JP5388608B2

Movatterモバイル変換

Info

Publication number: JP5388608B2
Application number: JP2009020470A
Authority: JP
Inventors: 康史本庄; 一樹池田; 利幸佐久間
Original assignee: Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Corp
Priority date: 2009-01-30
Filing date: 2009-01-30
Publication date: 2014-01-15
Anticipated expiration: 2029-01-30
Also published as: JP2010175198A

Description

本発明は、貯湯式給湯機に関するものである。 The present invention relates to a hot water storage type water heater.

貯湯タンクに貯留した湯を該貯湯タンクから所定の給湯先に供給する貯湯式給湯機では、貯湯タンクからの湯と水道等の水源からの水とを混合弁に導き、該混合弁の開度を制御装置により制御して、給湯先での給湯温度をユーザの設定温度に調整する。上記の混合弁は給湯先への給湯が終わるたびに水側全開または湯側全閉にされるというものではなく、例えば特許文献１に記載された貯湯式給湯機（給湯システム）におけるように、次回の給湯時に給湯温度が安定するよう、給湯停止後も所定の開度（以下、「安定給湯開度」という）に保たれる。 In a hot water storage type water heater that supplies hot water stored in a hot water storage tank to a predetermined hot water supply destination from the hot water storage tank, hot water from the hot water storage tank and water from a water source such as a water supply are led to a mixing valve, and the opening of the mixing valve Is controlled by the control device to adjust the hot water supply temperature at the hot water supply destination to the temperature set by the user. The above mixing valve is not to be fully opened on the water side or fully closed on the hot water side every time hot water supply to the hot water supply end is completed. For example, in a hot water storage type hot water heater (hot water system) described in Patent Document 1, A predetermined opening degree (hereinafter referred to as “stable hot water supply opening degree”) is maintained even after the hot water supply is stopped so that the hot water supply temperature is stabilized at the next hot water supply.

近年では、例えば特許文献２に記載された貯湯式給湯機（自動給湯装置）のように、ユーザが給湯栓を操作する一般給湯先（台所等）と給湯栓が不要な浴槽とに給湯可能な貯湯式給湯機が一般的になってきている。このような貯湯式給湯機では、出湯側が二股分岐した給湯管路により貯湯タンク内の湯が一般給湯先用の混合弁（以下、「一般給湯混合弁」という）と風呂給湯用の混合弁（以下、「風呂給湯混合弁」という）とに導かれる。また、出水側が二股分岐した給水管路により水源からの水が上記の一般給湯混合弁と風呂給湯混合弁とに導かれる。そして、一般給湯先への給湯温度に応じて一般給湯混合弁の開度が制御され、浴槽への給湯温度に応じて風呂給湯混合弁の開度が制御される。 In recent years, for example, a hot water storage hot water heater (automatic hot water supply device) described in Patent Document 2 can be used to supply hot water to a general hot water destination (such as a kitchen) where a user operates a hot water tap and a bathtub that does not require a hot water tap. Hot water storage water heaters are becoming popular. In such a hot water storage type water heater, the hot water in the hot water storage tank is divided into a mixing valve for general hot water supply (hereinafter referred to as “general hot water mixing valve”) and a mixing valve for bath hot water supply (hereinafter referred to as “general hot water mixing valve”). Hereinafter, it is referred to as “bath hot water mixing valve”). In addition, water from the water source is guided to the general hot water supply mixing valve and the bath hot water supply mixing valve by a water supply pipe having a bifurcated branch on the water discharge side. Then, the opening degree of the general hot water supply mixing valve is controlled according to the hot water supply temperature to the general hot water supply destination, and the opening degree of the bath hot water supply mixing valve is controlled according to the hot water supply temperature to the bathtub.

特開２００８−１６４２８６号公報JP 2008-164286 A特開２００８−２６７６９２号公報JP 2008-267692 A

しかしながら、二股分岐した給湯管路と給水管路とが一般給湯混合弁と風呂給湯混合弁とに接続された従来の貯湯式給湯機では、一般給湯先への給湯停止後に一般給湯混合弁の開度を安定給湯開度に保っておくと、浴槽への給湯時に貯湯タンク内の湯や水源からの水が一般給湯混合弁を通って風呂給湯混合弁に回り込み、浴槽への給湯温度が不安定になることがある。 However, in a conventional hot water storage type hot water heater in which a bifurcated hot water supply line and a water supply line are connected to a general hot water mixing valve and a bath hot water mixing valve, the general hot water mixing valve is opened after the hot water supply to the general hot water supply is stopped. If the temperature is kept at a stable hot water supply opening, the hot water in the hot water storage tank and the water from the water source go through the general hot water mixing valve to the bath hot water mixing valve when hot water is supplied to the bathtub, and the hot water temperature to the bathtub is unstable. It may become.

本発明は上記の事情に鑑みてなされたものであり、一般給湯先への給湯が停止されているときでも浴槽への給湯温度を安定させ易い貯湯式給湯機を得ることを目的とする。 The present invention has been made in view of the above circumstances, and an object of the present invention is to obtain a hot water storage type hot water heater that can easily stabilize the hot water supply temperature to a bathtub even when hot water supply to a general hot water supply destination is stopped.

本発明の貯湯式給湯機は、貯湯タンク内の湯を出湯側が二股分岐した給湯管路により一般給湯混合弁と風呂給湯混合弁とに供給すると共に、水源からの水を出水側が二股分岐した給水管路により一般給湯混合弁と風呂給湯混合弁とに供給し、一般給湯混合弁の開度と風呂給湯混合弁の開度とを制御装置により別個に調整して、一般給湯混合弁から一般給湯先への給湯温度と風呂給湯混合弁から浴槽への給湯温度とを制御する貯湯式給湯機であって、制御装置は、一般給湯先への給湯停止中に浴槽に給湯するときには、風呂給湯混合弁の開度に応じて一般給湯混合弁の開度を調整する。 The hot water storage type hot water supply apparatus of the present invention supplies hot water in a hot water storage tank to a general hot water mixing valve and a bath hot water mixing valve through a hot water supply pipe branched on the outlet side, and water supplied from the water source to the outlet side. Supply to the general hot water mixing valve and the bath hot water mixing valve by the pipe line, and adjust the opening of the general hot water mixing valve and the opening of the hot water hot water mixing valve separately by the control device. A hot water storage type water heater that controls the temperature of hot water supplied to the hot water and the temperature of hot water supplied to the bathtub from the hot water hot water mixing valve. The opening degree of the general hot water supply mixing valve is adjusted according to the opening degree of the valve.

本発明の貯湯式給湯機では、一般給湯先への給湯停止中に浴槽に給湯するときには風呂給湯混合弁の開度に応じて一般給湯混合弁の開度を調整し、一般給湯混合弁を通って風呂給湯混合弁に達する湯や水の回り込みを抑えるので、浴槽への給湯温度を安定させ易い。 In the hot water storage type water heater of the present invention, when hot water is supplied to the bathtub while hot water supply to the general hot water supply is stopped, the opening degree of the general hot water mixing valve is adjusted according to the opening degree of the bath hot water mixing valve, and the general hot water mixing valve is passed through. Therefore, it is easy to stabilize the hot water supply temperature to the bathtub.

図１は、本発明の貯湯式給湯機の一例を示す概略図である。FIG. 1 is a schematic view showing an example of a hot water storage type hot water supply apparatus of the present invention.図２は、図１に示した貯湯式給湯機での制御装置と該制御装置に接続された構成要素とを概略的に示すブロック図である。FIG. 2 is a block diagram schematically showing the control device and the components connected to the control device in the hot water storage type hot water heater shown in FIG.図３は、本発明の貯湯式給湯機で一般給湯先への給湯停止中に浴槽に給湯するときにおける風呂給湯混合弁の開度と一般給湯混合弁の開度との対応関係の一例を示すグラフである。FIG. 3 shows an example of the correspondence relationship between the opening degree of the bath hot water mixing valve and the opening degree of the general hot water mixing valve when hot water is supplied to the bathtub while hot water supply to the general hot water supply is stopped in the hot water storage type water heater of the present invention. It is a graph.図４は、一般給湯先への給湯停止中に浴槽に給湯するときにおける風呂給湯混合弁への湯と水の回り込みの一例を示す概略図である。FIG. 4 is a schematic diagram showing an example of hot water and water wrapping around the bath hot water mixing valve when hot water is supplied to the bathtub while hot water supply to the general hot water supply is stopped.図５は、一般給湯先への給湯停止中に浴槽に給湯するときにおける風呂給湯混合弁の開度と一般給湯混合弁での開度と浴槽への給湯温度との関係の一例を示すグラフである。FIG. 5 is a graph showing an example of the relationship between the opening degree of the bath hot water mixing valve, the opening degree of the general hot water mixing valve, and the hot water temperature to the bathtub when hot water is supplied to the bathtub while hot water supply to the general hot water supply is stopped. is there.図６は、本発明の貯湯式給湯機で一般給湯先への給湯停止中に浴槽に給湯するときにおける一般給湯混合弁および風呂給湯混合弁それぞれの開度調整の手順の一例を示すフローチャートである。FIG. 6 is a flowchart showing an example of procedures for adjusting the opening degrees of the general hot water mixing valve and the bath hot water mixing valve when hot water is supplied to the bathtub while hot water supply to the general hot water supply is stopped in the hot water storage type water heater of the present invention. .

以下、本発明の貯湯式給湯機の実施の形態について、図面を参照して詳細に説明する。なお、本発明は下記の形態に限定されるものではない。 DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a hot water storage type water heater of the present invention will be described in detail with reference to the drawings. In addition, this invention is not limited to the following form.

図１は、本発明の貯湯式給湯機の一例を示す概略図である。同図に示す貯湯式給湯機１３０は、熱源機で沸き上げた湯を貯湯タンクに貯留し、ここから一般給湯先１５０と浴槽１６０とに湯を供給する機能を有するものであり、ヒートポンプユニット１０と給湯機本体１１０とリモートコントローラ１２０とを備えている。以下、貯湯式給湯機１３０の各構成要素について説明する。 FIG. 1 is a schematic view showing an example of a hot water storage type hot water supply apparatus of the present invention. The hot water storage typehot water heater 130 shown in the figure has a function of storing hot water boiled by a heat source machine in a hot water storage tank and supplying hot water to the general hotwater supply destination 150 and thebathtub 160 from here. And a water heatermain body 110 and aremote controller 120. Hereinafter, each component of the hot water storagetype water heater 130 will be described.

上記のヒートポンプユニット１０は、冷媒を圧縮する圧縮機と、放熱器に相当する沸上げ用熱交換器と、膨張弁と、蒸発器と、これらを環状に接続する循環配管とを有する冷凍サイクル部（図示せず）を備え、後述する制御装置１００による制御の下に動作して熱源機として機能する。上記の冷凍サイクル部では、二酸化炭素等の冷媒が圧縮機で圧縮されて高温、高圧となった後に沸上げ用熱交換器で放熱し、膨張弁で減圧され、蒸発器で吸熱してガス状態となって圧縮機に吸入される。 Theheat pump unit 10 includes a compressor that compresses refrigerant, a heat exchanger for boiling corresponding to a radiator, an expansion valve, an evaporator, and a circulation pipe that connects these in an annular shape. (Not shown), and operates under the control of thecontrol device 100 described later to function as a heat source machine. In the above refrigeration cycle section, a refrigerant such as carbon dioxide is compressed by a compressor to become a high temperature and high pressure, then dissipated heat by a heat exchanger for boiling, depressurized by an expansion valve, and absorbed by an evaporator to be in a gas state And is sucked into the compressor.

一方、給湯機本体１１０は、貯湯タンク２０、給水管路３０、貯湯用循環管路４０、給湯管路５０、一般給湯混合弁６５、風呂給湯混合弁７０、一般用給湯管路８０、風呂用給湯管路９０、および制御装置１００等を有している。 On the other hand, the water heatermain body 110 includes a hotwater storage tank 20, awater supply pipe 30, a hotwater circulation pipe 40, a hotwater supply pipe 50, a general hotwater mixing valve 65, a bath hotwater mixing valve 70, a general hotwater supply pipe 80, and a bath. It has a hotwater supply line 90, acontrol device 100, and the like.

上記の貯湯タンク２０は、給水管路３０から供給される水を貯留すると共にヒートポンプユニット１０で沸き上げられた湯を貯留する積層式の貯湯タンクであり、その下部には給水管路３０と貯湯用循環管路４０の往き管４０ａが、また上部には貯湯用循環管路４０の戻り管４０ｂと給湯管路５０がそれぞれ接続されている。この貯湯タンク２０は、給水管路３０からの給水により常に満水状態に保たれる。 The hotwater storage tank 20 is a stacked hot water storage tank that stores water supplied from thewater supply pipe 30 and also stores hot water boiled by theheat pump unit 10. Thereturn pipe 40a of the hotwater circulation line 40 is connected to theforward pipe 40a of the hotwater circulation pipe 40, and the hotwater supply pipe 50 is connected to the upper part thereof. The hotwater storage tank 20 is always kept in a full state by supplying water from thewater supply pipe 30.

貯湯タンク２０の上部には、貯湯タンク２０から給湯管路５０に流入する湯の温度を検知するためのタンク温度センサ２０ａが取り付けられている。また、貯湯タンク２０の周面部には、貯湯タンク２０内の湯の温度を検知するための複数の沸上げ温度センサ（図示せず）が互いに異なる取付け高さをもって取り付けられている。 Atank temperature sensor 20 a for detecting the temperature of hot water flowing from the hotwater storage tank 20 into the hotwater supply pipe 50 is attached to the upper part of the hotwater storage tank 20. A plurality of boiling temperature sensors (not shown) for detecting the temperature of hot water in the hotwater storage tank 20 are attached to the peripheral surface portion of the hotwater storage tank 20 with different mounting heights.

給水管路３０は、市水等の水を貯湯タンク２０、一般給湯混合弁６５、風呂給湯混合弁７０、および一般給湯先１５０に供給する管路であり、減圧弁２３、給水温度センサ２５、第１逆止弁２７、第１給水管部３０ａ、第２給水管部３０ｂ、および第３給水管部３０ｃを有している。減圧弁２３は、第１給水管部３０ａの途中に設けられて、水道等の水源（図示せず）からの水圧を所定値に減じる。給水温度センサ２５は、第１給水管部３０ａでの減圧弁２３の上流側に設けられて、該第１給水管部３０ａ内の水の温度を検知する。第１逆止弁２７は、第２給水管部３０ｂでの出水口側に配置されて、当該第２給水管部２０ｂでの水の逆流を防止する。 Thewater supply line 30 is a line for supplying water such as city water to the hotwater storage tank 20, the general hotwater mixing valve 65, the bath hotwater mixing valve 70, and the general hotwater supply destination 150. Thepressure reducing valve 23, thewater temperature sensor 25, It has the1st check valve 27, the 1st watersupply pipe part 30a, the 2nd watersupply pipe part 30b, and the 3rd watersupply pipe part 30c. Thepressure reducing valve 23 is provided in the middle of the first watersupply pipe section 30a, and reduces the water pressure from a water source (not shown) such as a water supply to a predetermined value. The feedwater temperature sensor 25 is provided on the upstream side of thepressure reducing valve 23 in the first feedwater pipe section 30a, and detects the temperature of the water in the first feedwater pipe section 30a. The 1stnon-return valve 27 is arrange | positioned at the water outlet side in the 2nd watersupply pipe part 30b, and prevents the backflow of the water in the said 2nd water supply pipe part 20b.

また、上記の第１給水管部３０ａは水源と貯湯タンク２０とを繋ぐ。第２給水管部３０ｂは、本発明でいう出水側が二股分岐した給水管路に相当し、減圧弁２３の下流側で第１給水管部３０ａから分かれて該第１給水管部３０ａと一般給湯混合弁６５および風呂給湯混合弁７０の各々とを繋ぐ。第３給水管部３０ｃは、減圧弁２３の上流側で第１給水管部３０ａから分かれて該第１給水管部３０ａと一般給湯先１５０とを繋ぐ。第２給水管部３０ｂでの二股分岐箇所の上流側に第１逆止弁２７が設けられている。なお、図１には、一般給湯先１５０として１つの給湯栓が示されている。一般給湯先１５０には、サーモスタット付き混合水栓やシャワー等が接続されていてもよい。 The first watersupply pipe portion 30 a connects the water source and the hotwater storage tank 20. The 2nd watersupply pipe part 30b is equivalent to the water supply pipe line where the water discharge side in the present invention is bifurcated, and is separated from the first watersupply pipe part 30a on the downstream side of thepressure reducing valve 23 and the first watersupply pipe part 30a and the general hot water supply. Each of themixing valve 65 and the bath / hotwater mixing valve 70 is connected. The third watersupply pipe section 30 c is separated from the first watersupply pipe section 30 a on the upstream side of thepressure reducing valve 23 and connects the first watersupply pipe section 30 a and the general hotwater supply destination 150. Afirst check valve 27 is provided upstream of the bifurcated branch in the second watersupply pipe portion 30b. In FIG. 1, one hot water tap is shown as the general hotwater supply destination 150. The generalhot water supply 150 may be connected to a mixing faucet with a thermostat, a shower, or the like.

貯湯用循環管路４０は、貯湯タンク２０の下部からヒートポンプユニット１０中の沸上げ用熱交換器を経由して貯湯タンク２０の上部に達する管路であり、貯湯用送水ポンプ３５、往き管４０ａ、および戻り管４０ｂを有している。貯湯用送水ポンプ３５は往き管４０ａに設けられており、該往き管４０ａは貯湯タンク２０の下部と上記沸上げ用熱交換器とを繋ぐ。戻り管４０ｂは、上記沸上げ用熱交換器と貯湯タンク２０の上部とを繋ぐ。 The hot waterstorage circulation line 40 is a pipe line that reaches the upper part of the hotwater storage tank 20 from the lower part of the hotwater storage tank 20 via the boiling heat exchanger in theheat pump unit 10, and includes a hot waterstorage water pump 35 and anoutgoing pipe 40a. , And areturn pipe 40b. The hot waterstorage water pump 35 is provided in theforward pipe 40a, and theforward pipe 40a connects the lower part of the hotwater storage tank 20 to the boiling heat exchanger. Thereturn pipe 40 b connects the boiling heat exchanger and the upper part of the hotwater storage tank 20.

給湯管路５０は、本発明でいう出湯側が二股分岐した給湯管路に相当し、二股分岐箇所の上流側に第２逆止弁４５を有している。この給湯管路５０は、入湯側が貯湯タンク２０の上部に接続され、二股分岐した出湯側での一方の流路が一般給湯混合弁６５に、また他方の流路が風呂給湯混合弁７０にそれぞれ接続されて、貯湯タンク２０内の湯を一般給湯混合弁６５と風呂給湯混合弁７０とに導く。第２逆止弁４５は、給湯管路５０での上記分岐箇所の上流側に設けられている。 The hotwater supply pipe 50 corresponds to the hot water supply pipe branched at the outlet side in the present invention, and has asecond check valve 45 upstream of the bifurcated branch. The hotwater supply pipe 50 has a hot water supply side connected to the upper part of the hotwater storage tank 20, one flow path at the bifurcated hot water supply side is connected to the general hot watersupply mixing valve 65, and the other flow path is connected to the bath hot watersupply mixing valve 70. The hot water in the hotwater storage tank 20 is connected to the general hotwater mixing valve 65 and the bath hotwater mixing valve 70. Thesecond check valve 45 is provided upstream of the branch point in the hotwater supply pipe 50.

膨張水排出管路６０は、給湯管路５０での入湯側の端部で該給湯管路５０から分かれて排出口（図示せず）に接続されており、この膨張水排出管路６０の途中に圧力逃し弁５５が取り付けられている。圧力逃し弁５５は、湯の沸上げにより貯湯タンク２０内の湯水が体積膨張を起こして当該貯湯タンク２０の内圧が所定圧力を超えたときに開弁し、体積膨張により生じた膨張水（余剰水）を膨張水排出管路６０から排出口へと排出して貯湯タンク２０の内圧過上昇を防止する。 The expansionwater discharge pipe 60 is separated from the hotwater supply pipe 50 at the end of the hotwater supply pipe 50 and connected to a discharge port (not shown). Apressure relief valve 55 is attached. Thepressure relief valve 55 opens when the hot water in the hotwater storage tank 20 undergoes volume expansion due to boiling of the hot water and the internal pressure of the hotwater storage tank 20 exceeds a predetermined pressure, and the expanded water generated by the volume expansion (excess water) Water) is discharged from the expandedwater discharge pipe 60 to the discharge port, and the internal pressure of the hotwater storage tank 20 is prevented from rising excessively.

一般給湯混合弁６５は電動式の弁であり、制御装置１００により開度を調整されて、第２給水管部３０ｂから供給される水と給湯管路５０から供給される湯とを所定の混合比の下に混合する。同様に、風呂給湯混合弁７０も電動式の弁であり、制御装置１００により開度を調整されて、第２給水管部３０ｂから供給される水と給湯管路５０から供給される湯とを所定の混合比の下に混合する。これら一般給湯混合弁６５と風呂給湯混合弁７０とは、制御装置１００により互いに別個に開度を制御することができるものであればよく、その構造は一体型、独立型等、適宜選定可能である。 The general hot watersupply mixing valve 65 is an electric valve whose opening is adjusted by thecontrol device 100 to mix the water supplied from the second watersupply pipe section 30b and the hot water supplied from the hot watersupply pipe line 50 with a predetermined mixing. Mix under the ratio. Similarly, the bath / hotwater mixing valve 70 is also an electric valve, and the opening degree thereof is adjusted by thecontrol device 100 so that water supplied from the second watersupply pipe portion 30b and hot water supplied from the hotwater supply pipe 50 are supplied. Mix under a predetermined mixing ratio. These general hotwater mixing valve 65 and bath hotwater mixing valve 70 only need to be capable of controlling the opening degree separately from each other bycontrol device 100, and the structure thereof can be selected as appropriate, such as an integral type or an independent type. is there.

一般用給湯管路８０は、一般用流量センサ７３と一般用温度センサ７５とを有しており、一般給湯混合弁６５と一般給湯先１５０とを繋ぐ。一般用流量センサ７３は一般用給湯管路８０での流量を検知し、一般用温度センサ７５は一般用給湯管路８０内の湯水の温度を検知する。図示の例では、一般用流量センサ７３の下流側に一般用温度センサ７５が設けられている。 The general hotwater supply pipe 80 has ageneral flow sensor 73 and ageneral temperature sensor 75, and connects the general hotwater mixing valve 65 and the generalhot water supply 150. Thegeneral flow sensor 73 detects the flow rate in the general hotwater supply pipe 80, and thegeneral temperature sensor 75 detects the temperature of the hot water in the general hotwater supply pipe 80. In the illustrated example, ageneral temperature sensor 75 is provided on the downstream side of thegeneral flow sensor 73.

風呂用給湯管路９０は、電磁弁８３と、風呂用流量センサ８５と、風呂用温度センサ８７とを有しており、風呂給湯混合弁７０と浴槽１６０とを繋ぐ。電磁弁８３は、制御装置１００により開度を調整されて風呂用給湯管路９０での流量を調節し、風呂用流量センサ８５は風呂用給湯管路９０での流量を検知し、風呂用温度センサ８７は風呂用給湯管路９０内の湯水の温度を検知する。図示の例では、電磁弁８３と、風呂用流量センサ８５と、風呂用温度センサ８７とが風呂給湯混合弁７０側からこの順番で設けられている。なお、浴槽１６０内には浴槽アダプタ１５５が取り付けられ、風呂用給湯管路９０は当該浴槽アダプタ１５５に接続される。 The bath hotwater supply line 90 includes anelectromagnetic valve 83, abath flow sensor 85, and abath temperature sensor 87, and connects the bath hotwater mixing valve 70 and thebathtub 160. Thesolenoid valve 83 is adjusted in opening degree by thecontrol device 100 to adjust the flow rate in the hotwater supply pipeline 90 for bath, and theflow sensor 85 for bath detects the flow rate in the hotwater supply pipeline 90 for bath to detect the bath temperature. Thesensor 87 detects the temperature of hot water in the hotwater supply pipe 90 for bath. In the illustrated example, anelectromagnetic valve 83, abath flow sensor 85, and abath temperature sensor 87 are provided in this order from the bath / hotwater mixing valve 70 side. Abathtub adapter 155 is attached in thebathtub 160, and the hotwater supply pipe 90 for bath is connected to thebathtub adapter 155.

制御装置１００は、リモートコントローラ１２０から受信した指令または情報と、タンク温度センサ２０ａ、各沸上げ温度センサ（図示せず）、給水温度センサ２５、一般用流量センサ７３、一般用温度センサ７５、風呂用流量センサ８５、または風呂用温度センサ８７の検知温度とに応じて、ヒートポンプユニット１０、貯湯用送水ポンプ３５、一般給湯混合弁６５、風呂給湯混合弁７０、または電磁弁８３の動作を制御する。 Thecontrol device 100 receives the command or information received from theremote controller 120, thetank temperature sensor 20a, each boiling temperature sensor (not shown), the feedwater temperature sensor 25, thegeneral flow sensor 73, thegeneral temperature sensor 75, the bath. The operation of theheat pump unit 10, the hot water storagewater supply pump 35, the general hot watersupply mixing valve 65, the bath / hotwater mixing valve 70, or theelectromagnetic valve 83 is controlled according to the detected temperature of theflow sensor 85 for bath or thetemperature sensor 87 for bath. .

給湯機本体１１０を構成する上述の構成要素のうち、給水管路３０、貯湯用循環管路４０、膨張水排出管路６０、一般用給湯管路８０、および風呂用給湯管路９０をそれぞれ除いた残りの構成要素は、外装ケース１０５に納められている。給水管路３０、貯湯用循環管路４０、膨張水排出管路６０、一般用給湯管路８０、および風呂用給湯管路９０の各々は、その一部が外装ケース１０５の外部にまで延在している。 Of the above-described components constituting the water heatermain body 110, thewater supply conduit 30, the hotwater circulation conduit 40, the expansionwater discharge conduit 60, the general hotwater supply conduit 80, and the bath hotwater supply conduit 90 are excluded. The remaining components are housed in theouter case 105. A part of each of thewater supply pipe 30, the hotwater circulation pipe 40, the expansionwater discharge pipe 60, the general hotwater supply pipe 80, and the bath hotwater supply pipe 90 extends to the outside of theexterior case 105. doing.

リモートコントローラ１２０は、複数の入力スイッチにより構成される操作部１１３と、液晶表示パネル等のフラットディスプレイパネルを用いて構成されて操作部１１３から入力された指令や情報、および制御装置１００から受信した運転状況等の情報等を文字、図形、キャラクタ等で視覚表示する表示部１１５と、メッセージのアナウンスや警告音の再生等を行う報知部（図示せず）と備えている。当該リモートコントローラ１２０は、制御装置１００に有線接続または無線接続されて、該制御装置１００と通信する。 Theremote controller 120 is configured using anoperation unit 113 including a plurality of input switches and a flat display panel such as a liquid crystal display panel, and receives commands and information input from theoperation unit 113 and received from thecontrol device 100. It includes adisplay unit 115 that visually displays information such as driving conditions in characters, figures, characters, and the like, and a notification unit (not shown) that performs message announcements, warning sound reproduction, and the like. Theremote controller 120 communicates with thecontrol device 100 by wired connection or wireless connection to thecontrol device 100.

図示の例では制御装置１００に１つのリモートコントローラ１２０のみが接続されているが、制御装置１００には１以上の所望数のリモートコントローラを接続することができる。また、リモートコントローラ１２０は台所や浴室等、所望の場所に設置可能である。 In the illustrated example, only oneremote controller 120 is connected to thecontrol device 100, but one or more desired number of remote controllers can be connected to thecontrol device 100. Theremote controller 120 can be installed in a desired place such as a kitchen or a bathroom.

上述の各構成要素を備えた貯湯式給湯機１３０は、給水管路３０から貯湯タンク２０に給水して該貯湯タンク２０、貯湯用循環管路４０、給湯管路５０、一般用給湯管路８０、および風呂用給湯管路９０の各々が満水状態にされた後に使用に供され、貯湯タンク２０内の水を湯に沸き上げる沸上げ運転、一般給湯先１５０への給湯運転、または浴槽１６０への給湯運転を適宜行う。 The hot water storage typehot water heater 130 having each of the above-described components supplies water to the hotwater storage tank 20 from thewater supply pipe 30 and supplies the hotwater storage tank 20, the hotwater circulation pipe 40, the hotwater supply pipe 50, and the general hotwater supply pipe 80. , And the hotwater supply pipe 90 for bathing are used after being filled with water, the water is heated in the hotwater storage tank 20 to the hot water, the hot water supply operation to the generalhot water supply 150, or to thebathtub 160. The hot water supply operation is appropriately performed.

沸上げ運転は、例えばユーザがリモートコントローラ１２０から沸上げ開始指令を入力すると、あるいはユーザがリモートコントローラ１２０から入力した沸上げ開始時刻になると、制御装置１００による制御の下にヒートポンプユニット１０および貯湯用送水ポンプ３５が起動され、開始される。ユーザは、希望する沸上げ温度および沸上げ湯量を予めリモートコントローラ１２０から入力しておく。 In the boiling operation, for example, when the user inputs a boiling start command from theremote controller 120, or when the boiling start time input by the user from theremote controller 120 is reached, theheat pump unit 10 and the hot water storage are controlled under the control of thecontrol device 100. Thewater pump 35 is activated and started. The user inputs a desired boiling temperature and boiling water amount from theremote controller 120 in advance.

沸上げ運転が開始されると、制御装置１００は、沸上げ湯量に対応した所定の沸上げ温度センサの検知温度を監視し、該検知温度が所定温度以上になると、上記沸上げ湯量以上の湯が貯湯タンク２０に貯留されたと判断して沸上げ運転を停止させる。この間、貯湯タンク２０の下部から貯湯用循環管路４０の往き管４０ａに水が流入し、ヒートポンプユニット１０内の沸上げ用熱交換器に通水されて該沸上げ用熱交換器で湯に沸き上げられる。沸上げ用熱交換器で沸き上げられた湯は、貯湯用循環管路４０の戻り管４０ｂを通って貯湯タンク２０の上部から貯湯タンク２０内に戻される。 When the boiling operation is started, thecontrol device 100 monitors the detection temperature of a predetermined boiling temperature sensor corresponding to the amount of boiling water, and when the detected temperature becomes equal to or higher than the predetermined temperature, Is stored in the hotwater storage tank 20 and the boiling operation is stopped. During this time, water flows from the lower part of the hotwater storage tank 20 into theforward pipe 40a of the hot waterstorage circulation line 40, and is passed through the heating heat exchanger in theheat pump unit 10 to be heated into the hot water by the boiling heat exchanger. Boiled. Hot water boiled by the boiling heat exchanger is returned to the hotwater storage tank 20 from the upper part of the hotwater storage tank 20 through thereturn pipe 40b of the hot waterstorage circulation line 40.

一方、一般給湯先１５０への給湯運転は、一般給湯先１５０をユーザが開栓して一般用流量センサ７３が所定流量以上の水流を検知すると、制御装置１００による制御の下に開始される。当該給湯運転では、タンク温度センサ２０ａの検知温度と、給水温度センサ２５の検知温度と、ユーザがリモートコントローラ１２０から入力した給湯温度に係る情報とに基づき、制御装置１００が一般給湯混合弁６５の開度（給湯管路５０側の弁開度および第２給水管部３０ｂ側の弁開度）を調整して、給湯管路５０からの湯と第２給水管部３０ｂからの水との混合比を調整する。そして、一般用温度センサ７５の検知温度に基づいて制御装置１００が一般給湯混合弁６５の開度を繰り返しフィードバック制御して、一般給湯先１５０での給湯温度をユーザの設定温度に調整する。 On the other hand, the hot water supply operation to the generalhot water supply 150 is started under the control of thecontrol device 100 when the user opens the generalhot water supply 150 and thegeneral flow sensor 73 detects a water flow of a predetermined flow rate or higher. In the hot water supply operation, thecontrol device 100 controls the general hot watersupply mixing valve 65 based on the temperature detected by thetank temperature sensor 20 a, the temperature detected by thewater temperature sensor 25, and information related to the hot water temperature input from theremote controller 120 by the user. Adjusting the opening (the valve opening on the side of the hotwater supply pipe 50 and the valve opening on the side of the secondwater supply pipe 30b) to mix the hot water from the hotwater supply pipe 50 and the water from the secondwater supply pipe 30b Adjust the ratio. Based on the temperature detected by thegeneral temperature sensor 75, thecontrol device 100 repeatedly feedback-controls the opening of the general hot watersupply mixing valve 65 to adjust the hot water supply temperature at the general hotwater supply destination 150 to the set temperature of the user.

一般給湯先１５０への給湯運転は、ユーザが一般給湯先１５０を閉栓して一般用流量センサ７３が所定流量以上の水流を検知しなくなると停止する。このとき、制御装置１００は、一般給湯先１５０に同じ給湯温度で断続的に給湯するときでも給湯温度が安定するように、予め定められた時間（以下、「一般給湯待機時間」という）に亘って、一般給湯混合弁６５での開度を上記の給湯温度に対応した開度（以下、「安定給湯開度」という）に保つ。当該一般給湯待機時間が経過すると、一般給湯混合弁６５の開度を予め定められた初期開度に調整する。なお、図１においては、一般給湯先１５０への湯水の流れ方向を実線の矢印Ａで示している。 The hot water supply operation to the generalhot water supply 150 is stopped when the user closes the generalhot water supply 150 and thegeneral flow sensor 73 no longer detects a water flow exceeding a predetermined flow rate. At this time,control device 100 extends over a predetermined time (hereinafter referred to as “general hot water supply standby time”) so that the hot water supply temperature is stabilized even when hot water is intermittently supplied to generalhot water supply 150 at the same hot water supply temperature. Thus, the opening degree of the general hot watersupply mixing valve 65 is maintained at an opening degree corresponding to the hot water supply temperature (hereinafter referred to as “stable hot water supply opening degree”). When the general hot water supply standby time has elapsed, the opening degree of the general hot watersupply mixing valve 65 is adjusted to a predetermined initial opening degree. In addition, in FIG. 1, the flow direction of the hot water to the general hotwater supply destination 150 is indicated by a solid arrow A.

また、浴槽１６０への給湯運転は、ユーザがリモートコントローラ１２０から湯張り開始指令、差し湯指令、足し湯指令等、浴槽１６０への給湯（水である場合を含む）に係る指令を入力すると、制御装置１００が電磁弁８３に開指令を出して開始される。当該給湯運転では、タンク温度センサ２０ａの検知温度と、給水温度センサ２５の検知温度と、ユーザがリモートコントローラ１２０から入力した湯張り温度、差し湯温度、足し湯温度等の温度情報に基づき、制御装置１００が風呂給湯混合弁７０の開度（給湯管路５０側の弁開度および第２給水管部３０ｂ側の弁開度）を調整して、給湯管路５０からの湯と第２給水管部３０ｂからの水との混合比を調整する。そして、風呂用温度センサ８７の検知温度に基づいて制御装置１００が風呂給湯混合弁７０の開度を繰り返しフィードバック制御して、浴槽１６０への給湯温度をユーザの設定温度に調整する。 The hot water supply operation to thebathtub 160 is performed when the user inputs a command related to hot water supply to the bathtub 160 (including the case of water), such as a hot water start command, a hot water command, and an additional hot water command, from theremote controller 120. Thecontrol device 100 is started by issuing an open command to theelectromagnetic valve 83. In the hot water supply operation, control is performed based on temperature information such as the temperature detected by thetank temperature sensor 20a, the temperature detected by thewater temperature sensor 25, and the hot water temperature, hot water temperature, additional hot water temperature, etc. input by the user from theremote controller 120. Theapparatus 100 adjusts the opening of the bath / hot water mixing valve 70 (the valve opening on the hotwater supply pipe 50 side and the valve opening on the secondwater supply pipe 30b side), and the hot water and the second water supply from the hotwater supply pipe 50 are adjusted. The mixing ratio with water from thepipe part 30b is adjusted. And thecontrol apparatus 100 repeatedly feedback-controls the opening degree of the bath hotwater mixing valve 70 based on the detection temperature of thebath temperature sensor 87, and adjusts the hot water supply temperature to thebathtub 160 to a user's preset temperature.

一般給湯先１５０への給湯停止中に浴槽１６０に給湯するときには、風呂給湯混合弁７０の開度に応じて、制御装置１００が一般給湯混合弁６５の開度を調整する。このときの一般給湯混合弁６５の開度（以下、「指定待機開度」という）は、貯湯式給湯機１３０のメーカにより予め定められる。指定待機開度については、後に詳述する。 When hot water is supplied to thebathtub 160 while hot water supply to the generalhot water supply 150 is stopped, thecontrol device 100 adjusts the opening degree of the general hot watersupply mixing valve 65 according to the opening degree of the bath hotwater mixing valve 70. The opening degree of the general hot watersupply mixing valve 65 at this time (hereinafter referred to as “designated standby opening degree”) is determined in advance by the manufacturer of the hot water storage typehot water heater 130. The designated standby opening will be described in detail later.

浴槽１６０への給湯運転は、風呂用流量センサ８５の検知結果が湯張り湯量、差し湯湯量、または足し湯湯量等に達すると、あるいはリモートコントローラ１２０から浴槽１６０への給湯の停止を指示する指令が入力されると、制御装置１００が電磁弁８３に閉指令を出して停止する。上記の湯張り湯量、差し湯湯量、足し湯湯量等の給湯量情報は、リモートコントローラ１２０からユーザにより予め入力される。図１においては、浴槽１６０への湯水の流れ方向を実線の矢印Ｂで示している。また、浴槽１６０内の浴水を参照符号１６０ａで示している。 The hot water supply operation to thebathtub 160 is a command for instructing to stop the hot water supply from theremote controller 120 to thebathtub 160 when the detection result of thebath flow sensor 85 reaches the amount of hot water, the amount of hot water, or the amount of hot water. Is input, thecontrol device 100 issues a close command to theelectromagnetic valve 83 and stops. Hot water supply amount information such as the amount of hot water, hot water, and additional hot water is input from theremote controller 120 in advance by the user. In FIG. 1, the flowing direction of hot water to thebathtub 160 is indicated by a solid arrow B. Further, the bath water in thebathtub 160 is indicated byreference numeral 160a.

上述のようにして一般給湯先１５０および浴槽１６０へ給湯運転を行う貯湯式給湯機１３０は、一般給湯先１５０への給湯停止中に浴槽１６０に給湯するときにおける一般給湯混合弁６５の開度調整に特徴を有しているので、以下、制御装置１００の構成および上記一般給湯混合弁６５の開度調整について図２〜図６を参照して詳述する。 As described above, the hot water storagetype water heater 130 that performs hot water supply operation to the general hotwater supply destination 150 and thebathtub 160 adjusts the opening degree of the general hot watersupply mixing valve 65 when hot water is supplied to thebathtub 160 while hot water supply to the general hotwater supply destination 150 is stopped. Therefore, the configuration of thecontrol device 100 and the opening adjustment of the general hot watersupply mixing valve 65 will be described in detail below with reference to FIGS.

図２は、図１に示した貯湯式給湯機での制御装置と該制御装置に接続された構成要素とを概略的に示すブロック図である。同図に示すように、貯湯式給湯機１３０（図１参照）の制御装置１００は、送受信処理部９１、制御部９３、および記憶部９５を有しており、ヒートポンプユニット１０、タンク温度センサ２０ａ、給水温度センサ２５、貯湯用送水ポンプ３５、一般給湯混合弁６５、風呂給湯混合弁７０、一般用流量センサ７３、一般用温度センサ７５、電磁弁８３、風呂用流量センサ８５、風呂用温度センサ８７、およびリモートコントローラ１２０に接続されている。図２では図示を省略しているが、制御装置１００は、前述した沸上げ温度センサの各々にも接続されている。 FIG. 2 is a block diagram schematically showing the control device and the components connected to the control device in the hot water storage type hot water heater shown in FIG. As shown in the figure, thecontrol device 100 of the hot water storage type hot water heater 130 (see FIG. 1) includes a transmission /reception processing unit 91, acontrol unit 93, and astorage unit 95, and includes aheat pump unit 10, atank temperature sensor 20a. , Watersupply temperature sensor 25, hot waterstorage water pump 35, general hot watersupply mixing valve 65, bath hot watersupply mixing valve 70,general flow sensor 73,general temperature sensor 75,solenoid valve 83,bath flow sensor 85,bath temperature sensor 87 and theremote controller 120. Although not shown in FIG. 2, thecontrol device 100 is also connected to each of the boiling temperature sensors described above.

制御装置１００を構成する上記の送受信処理部９１は、ヒートポンプユニット１０への指令の送信に係る処理、リモートコントローラ１２０からの指令や情報の受信および振り分けに係る処理、およびリモートコントローラ１２０への情報（例えば運転状況等）の送信に係る処理を行う。 The transmission /reception processing unit 91 that constitutes thecontrol device 100 performs processing related to transmission of a command to theheat pump unit 10, processing related to reception and distribution of commands and information from theremote controller 120, and information to the remote controller 120 ( For example, processing related to transmission of driving conditions and the like is performed.

制御部９３は、送受信処理部９１が振り分けてきたリモートコントローラ１２０からの指令や情報と、貯湯式給湯機１３０を構成する各センサの検知結果とに基づいて、沸上げ運転および給湯運転を総括的に制御する。また、上記各センサの検知結果に基づいて貯湯式給湯機１３０の運転状況等に係る情報を纏め、送受信処理部９１の動作を制御して当該情報をリモートコントローラ１２０宛に送信させる。これらの処理を行うために、制御部９３は、沸上げ制御部９３ａ、給湯制御部９３ｂ、および計時部９３ｃを有している。 Thecontrol unit 93 comprehensively performs the boiling operation and the hot water supply operation based on the commands and information from theremote controller 120 distributed by the transmission /reception processing unit 91 and the detection results of each sensor constituting the hot water storagetype water heater 130. To control. Further, based on the detection results of the sensors, information related to the operation status of the hot water storagehot water heater 130 is collected, the operation of the transmission /reception processing unit 91 is controlled, and the information is transmitted to theremote controller 120. In order to perform these processes, thecontrol unit 93 includes a boilingcontrol unit 93a, a hot watersupply control unit 93b, and atimer unit 93c.

上記の沸上げ制御部９３ａは、ユーザがリモートコントローラ１２０から入力して送受信処理部９１により振り分けられてきた沸上げ開始時刻、沸上げ運転時の沸上げ温度、および沸上げ運転時の沸上げ湯量に係る各情報を記憶部９５に格納する。そして、上記沸上げ開始時刻、沸上げ運転時の沸上げ温度、および沸上げ運転時の沸上げ湯量それぞれの情報と、各沸上げ温度センサ（図示せず）のうちの所定の温度センサの検知温度とを用いて、前述した沸上げ運転を制御する。 The boilingcontroller 93a receives the boiling start time, the boiling temperature at the boiling operation, and the amount of boiling water at the boiling operation, which are input by the user from theremote controller 120 and distributed by the transmission /reception processor 91. Each piece of information is stored in thestorage unit 95. And the information of each said boiling start time, the boiling temperature at the time of boiling operation, the amount of boiling water at the time of boiling operation, and detection of the predetermined temperature sensor of each boiling temperature sensor (not shown) The above-described boiling operation is controlled using the temperature.

一方、給湯制御部９３ｂは、ユーザがリモートコントローラ１２０から入力して送受信処理部９１により振り分けられてきた一般給湯先１５０（図１参照）への給湯温度と、浴槽１６０（図１参照）への給湯温度（湯張り温度、差し湯温度、足し湯温度）に係る情報とを記憶部９５に格納する。また、ユーザがリモートコントローラ１２０から入力して送受信処理部９１により振り分けられてきた浴槽１６０（図１参照）への給湯量（湯張り湯量や足し湯湯量等）に係る情報も記憶部９５に格納する。 On the other hand, the hot watersupply control unit 93b receives the hot water supply temperature to the general hot water supply destination 150 (see FIG. 1) input by the user from theremote controller 120 and distributed by the transmission /reception processing unit 91, and the bath 160 (see FIG. 1). Information relating to the hot water supply temperature (hot water temperature, hot water temperature, additional hot water temperature) is stored in thestorage unit 95. In addition, information related to the amount of hot water supplied to the bathtub 160 (see FIG. 1) input by the user from theremote controller 120 and distributed by the transmission / reception processing unit 91 (such as the amount of hot water and the amount of hot water added) is also stored in thestorage unit 95. To do.

当該給湯制御部９３ｂは、上記の情報と、タンク温度センサ２０ａ、給水温度センサ２５、一般用流量センサ７３、一般用温度センサ７５、風呂用流量センサ８５、または風呂用温度センサ８７の検知結果とを用いて、前述した給湯運転を制御する。また、一般給湯先１５０への給湯が停止すると、計時部９３ｃに計時を開始させる。そして、一般給湯先１５０への給湯停止後、前述した一般給湯待機時間が経過するまでの間に浴槽１６０に給湯するときには、風呂給湯混合弁７０の開度に応じて一般給湯混合弁６５の開度を調整して、一般給湯混合弁６５を通って風呂給湯混合弁７０に達する湯や水の回り込みを抑える。具体的には、風呂給湯混合弁７０の開度と一般給湯混合弁６５の安定給湯開度とに応じて一般給湯混合弁６５の開度を前述の指定待機開度に調整して、一般給湯混合弁６５を通って風呂給湯混合弁７０に達する湯や水の回り込みを抑える。一般給湯待機時間が経過するまでの間に浴槽１６０に給湯が行われなかったときには、一般給湯混合弁６５の開度を前述の初期開度に調整する。 The hot watersupply control unit 93b includes the above information and the detection result of thetank temperature sensor 20a, the watersupply temperature sensor 25, thegeneral flow sensor 73, thegeneral temperature sensor 75, thebath flow sensor 85, or thebath temperature sensor 87. Is used to control the hot water supply operation described above. In addition, when the hot water supply to the general hotwater supply destination 150 is stopped, thetime measuring unit 93c starts measuring time. Then, when hot water is supplied to thebathtub 160 after the hot water supply to the generalhot water supply 150 is stopped and before the general hot water supply waiting time elapses, the general hotwater mixing valve 65 is opened according to the opening degree of the bath hotwater mixing valve 70. The temperature is adjusted to prevent the hot water or water from reaching the bath hotwater mixing valve 70 through the general hotwater mixing valve 65. Specifically, the opening degree of the general hotwater mixing valve 65 is adjusted to the above-mentioned designated standby opening degree according to the opening degree of the bath hotwater mixing valve 70 and the stable hot water supply opening degree of the general hotwater mixing valve 65, thereby The hot water or water that reaches the bath hotwater mixing valve 70 through the mixingvalve 65 is suppressed. When hot water is not supplied to thebathtub 160 until the general hot water supply waiting time elapses, the opening degree of the general hotwater mixing valve 65 is adjusted to the above-described initial opening degree.

一般給湯混合弁６５の指定待機開度および初期開度、ならびに上記の一般給湯待機時間については、貯湯式給湯機１３０のメーカにより予め定められて、これらの情報が記憶部９５に格納される。また、一般給湯混合弁６５の指定待機開度を変更させる契機となる風呂給湯混合弁７０の開度に係る情報も、貯湯式給湯機１３０のメーカにより予め定められて記憶部９５に格納される。以下、一般給湯先１５０への給湯停止中に浴槽１６０に給湯するときにおける一般給湯混合弁６５の開度調整について、図３を参照して詳述する。 The designated standby opening and initial opening of the general hotwater mixing valve 65 and the above-described general hot water supply standby time are determined in advance by the manufacturer of the hot water storage typehot water heater 130, and these pieces of information are stored in thestorage unit 95. Further, information on the opening degree of the bath / hotwater mixing valve 70 which is an opportunity to change the designated standby opening degree of the general hotwater mixing valve 65 is also determined in advance by the manufacturer of the hot waterstorage water heater 130 and stored in thestorage unit 95. . Hereinafter, the opening degree adjustment of the general hotwater mixing valve 65 when hot water is supplied to thebathtub 160 while hot water supply to the generalhot water supply 150 is stopped will be described in detail with reference to FIG.

図３は、一般給湯先への給湯停止中に浴槽に給湯するときにおける風呂給湯混合弁の開度と一般給湯混合弁の開度との対応関係の一例を示すグラフである。図示の例では、一般給湯混合弁６５（図１参照）の開度（指定待機開度）として、中間開度よりも水側全開に近い第１指定待機開度γと、中間開度よりも湯側全開に近い第２指定待機開度δとが設定されている。第１指定待機開度γは、一般給湯混合弁６５での水の混合比率が第１の設定値となる開度であり、第２指定待機開度δは、一般給湯混合弁６５での水の混合比率が上記第１の設定値よりも低い第２の設定値となる開度である。 FIG. 3 is a graph showing an example of a correspondence relationship between the opening degree of the bath hot water mixing valve and the opening degree of the general hot water mixing valve when hot water is supplied to the bathtub while hot water supply to the general hot water supply is stopped. In the illustrated example, as the opening degree (designated standby opening degree) of the general hot water mixing valve 65 (see FIG. 1), the first designated standby opening degree γ closer to the water side fully open than the intermediate opening degree, and the intermediate opening degree than A second designated standby opening δ close to the hot water side full open is set. The first designated standby opening γ is an opening at which the mixing ratio of water in the general hotwater mixing valve 65 becomes the first set value, and the second designated standby opening δ is water in the general hotwater mixing valve 65. Is an opening at which the mixing ratio becomes a second set value lower than the first set value.

一般給湯混合弁６５の開度は、浴槽１６０（図１参照）への給湯開始時における風呂給湯混合弁７０（図１参照）の開度が「β」未満のときには、制御装置１００の給湯制御部９３ｂにより第１指定待機開度γに調整され、浴槽１６０への給湯開始時における風呂給湯混合弁７０の開度が「β」以上のときには、給湯制御部９３ｂにより第２指定待機開度δに調整される。風呂給湯混合弁７０の開度が「β」であるときの風呂給湯混合弁７０での水の混合比率は、一般給湯混合弁６５の指定待機開度を変更させる契機となる第１の混合比率に相当する。当該開度「β」および「第１の混合比率」の値は、貯湯式給湯機１３０（図１参照）のメーカにより予め定められて記憶部９５（図２参照）に格納される。 When the opening degree of the general hotwater mixing valve 65 is less than “β” at the start of hot water supply to the bathtub 160 (see FIG. 1), the hot water control of thecontrol device 100 is performed. When the opening degree of the bath / hotwater mixing valve 70 at the start of hot water supply to thebathtub 160 is equal to or larger than “β”, the second designated standby opening degree δ is adjusted by the hot watersupply control unit 93b. Adjusted to The water mixing ratio in the bath / hotwater mixing valve 70 when the opening degree of the bath / hotwater mixing valve 70 is “β” is the first mixing ratio that triggers the change of the designated standby opening degree of the general hotwater mixing valve 65. It corresponds to. The values of the opening “β” and “first mixing ratio” are determined in advance by the manufacturer of the hot-water storage type hot water heater 130 (see FIG. 1) and stored in the storage unit 95 (see FIG. 2).

また、浴槽１６０への給湯温度を給湯制御部９３ｂがフィードバック制御する過程で、風呂給湯混合弁７０での水の混合比率が上記第１の混合比率を超える値から上記第１の混合比率以下の値に変化したときには、給湯制御部９３ｂによって一般給湯混合弁６５の開度が第１指定待機開度γから第２指定待機開度δに調整される。 Further, in the process in which the hot watersupply control unit 93b performs feedback control of the hot water supply temperature to thebathtub 160, the water mixing ratio in the bath hotwater mixing valve 70 is less than the first mixing ratio from a value exceeding the first mixing ratio. When the value is changed, the opening degree of the general hotwater mixing valve 65 is adjusted from the first designated standby opening degree γ to the second designated standby opening degree δ by the hot watersupply control unit 93b.

逆に、浴槽１６０への給湯温度を給湯制御部９３ｂがフィードバック制御する過程で、風呂給湯混合弁７０での水の混合比率が上記第１の混合比率以下の値から上記第１の混合比率を超える値に変化したときには、当該水の混合比率が第１の混合比率より高い第２の混合比率になるまでは、一般給湯混合弁６５の開度が給湯制御部９３ｂにより第２指定待機開度δに保たれる。そして、風呂給湯混合弁での水の混合比率が上記第２の混合比率を超えると、一般給湯混合弁６５の開度が給湯制御部９３ｂにより第１指定待機開度γに調整される。このように一般給湯混合弁６５の指定待機開度を調整することにより、該一般給湯混合弁６５の開度にハンチングが生じるのを防止する。 On the contrary, in the process in which the hotwater supply controller 93b performs feedback control of the hot water supply temperature to thebathtub 160, the mixing ratio of water in the bath hotwater mixing valve 70 is changed from the value equal to or lower than the first mixing ratio to the first mixing ratio. When the value exceeds the first mixing ratio, the opening degree of the general hot watersupply mixing valve 65 is changed by the hot watersupply control unit 93b until the mixing ratio of the water reaches a second mixing ratio higher than the first mixing ratio. kept at δ. And if the mixing ratio of the water in a bath hot-water supply mixing valve exceeds the said 2nd mixing ratio, the opening degree of the general hot-watersupply mixing valve 65 will be adjusted to the 1st designated standby opening degree (gamma) by the hot-watersupply control part 93b. By adjusting the designated standby opening degree of the general hot watersupply mixing valve 65 in this manner, hunting is prevented from occurring in the opening degree of the general hotwater mixing valve 65.

なお、図３中に示す風呂給湯混合弁７０での開度「α」での水の混合比率が上記第２の混合比率に相当する。これら開度「α」および第２の混合比率は、貯湯式給湯機１３０のメーカにより予め定められて記憶部９５に格納される。 In addition, the mixing ratio of water at the opening “α” in the bath / hotwater mixing valve 70 shown in FIG. 3 corresponds to the second mixing ratio. The opening “α” and the second mixing ratio are determined in advance by the manufacturer of the hot water storage typehot water heater 130 and stored in thestorage unit 95.

貯湯式給湯機１３０は、風呂給湯混合弁７０の開度に応じて一般給湯混合弁６５の開度を給湯制御部９３ｂにより上述のように調整することで、一般給湯先１５０への給湯停止中に浴槽１６０に給湯したときに湯や水が一般給湯混合弁６５を通って風呂給湯混合弁７０に回り込んでしまうのを防止する。 The hot water storage typehot water heater 130 is stopping hot water supply to the general hotwater supply destination 150 by adjusting the opening degree of the general hot watersupply mixing valve 65 by the hot watersupply control part 93b according to the opening degree of the bath hot watersupply mixing valve 70 as described above. When hot water is supplied to thebathtub 160, hot water or water is prevented from flowing into the bath hotwater mixing valve 70 through the general hotwater mixing valve 65.

図４は、浴槽への給湯時における風呂給湯混合弁への湯や水の回り込みの一例を示す概略図である。同図は、一般給湯先１５０（図１参照）への給湯停止中に浴槽１６０（図１参照）に給湯したときに生じる湯や水の回り込みを示している。 FIG. 4 is a schematic view showing an example of hot water or water wrapping around the bath hot water mixing valve when hot water is supplied to the bathtub. The figure shows hot water or water wraparound that occurs when hot water is supplied to the bathtub 160 (see FIG. 1) while hot water supply to the general hot water supply 150 (see FIG. 1) is stopped.

例えば、浴槽１６０内の浴水１６０ａ（図１参照）の温度を下げる（温くする）ために浴槽１６０へ水を供給するときには、風呂給湯混合弁７０の開度が水側全開にされて該風呂給湯混合弁７０の出口が大気開放状態になることから、給湯管路５０内の湯との間で圧力差が生じる。このとき、風呂給湯混合弁７０での湯側は閉弁されてはいるものの、一般給湯混合弁６５での湯側の弁は該一般給湯混合弁６５を安定給湯開度に保っていることから開状態になっている。 For example, when water is supplied to thebathtub 160 in order to lower (warm) the temperature of thebath water 160a (see FIG. 1) in thebathtub 160, the opening of the bath hotwater mixing valve 70 is fully opened on the water side. Since the outlet of the hot watersupply mixing valve 70 is opened to the atmosphere, a pressure difference is generated between the hot water in the hotwater supply pipe 50. At this time, although the hot water side in the bath hotwater mixing valve 70 is closed, the hot water side valve in the general hotwater mixing valve 65 maintains the general hotwater mixing valve 65 at a stable hot water supply opening. Opened.

そのため、図４中に一点鎖線の矢印Ｂ_H2で示すように、給湯管路５０からの湯が一般給湯混合弁６５を通って風呂給湯混合弁７０に回り込み、風呂用給湯管路９０に流入する。結果として、リモートコントローラ１２０（図１参照）から水の供給を指示したにも拘わらず浴槽１６０に温湯が供給されて、浴水１６０ａがなかなか温くならないといった事態になることがある。Therefore, as indicated by a one-dot chain line arrow B_H2 in FIG. 4, hot water from the hotwater supply pipe 50 passes through the general hot watersupply mixing valve 65 and flows into the bath hotwater mixing valve 70 and flows into the hotwater supply pipe 90 for bath. . As a result, although hot water is instructed from the remote controller 120 (see FIG. 1), hot water is supplied to thebathtub 160, and thebath water 160a may not be easily heated.

同様のことが、浴水１６０ａの温度を上げるために浴槽１６０に高温の差し湯を供給するときにも起こる。この場合には、図４中に破線の矢印Ｂ_C2で示すように、第２給水管部３０ｂからの水が一般給湯混合弁６５を通って風呂給湯混合弁７０に回り込み、風呂用給湯管路９０に流入する。なお、図４中の実線の矢印Ｂ_H1は、給湯管路５０から風呂給湯混合弁７０に直接流入して風呂用給湯管路９０に流出する湯の流れを示しており、実線の矢印Ｂ_C1は、第２給水管部３０ｂから風呂給湯混合弁７０に直接流入して風呂用給湯管路９０に流出する水の流れを示しており、参照符号「８０」は一般用給湯管路を示している。The same thing occurs when hot hot water is supplied to thebathtub 160 in order to raise the temperature of thebath water 160a. In this case, as indicated by a broken-line arrow B_C2 in FIG. 4, the water from the second watersupply pipe portion 30b passes through the general hot watersupply mixing valve 65 to the bath hotwater mixing valve 70, and the hot water supply pipe for bath Flow into 90. Note that a solid arrow B_H1 in FIG. 4 indicates the flow of hot water that flows directly from the hotwater supply pipe 50 into the bath hotwater mixing valve 70 and flows out into the bath hotwater supply pipe 90, and the solid arrow B_C1 Indicates the flow of water flowing directly from the second watersupply pipe section 30b into the bath hotwater mixing valve 70 and flowing out into the bath hotwater supply pipe 90, and reference numeral “80” indicates a general hot water supply pipe Yes.

図４に示したような湯の回り込みや水の回り込みは、例えば給湯管路５０から第２給水管部３０ｂへの水の流入および第２給水管部３０ｂから給湯管路５０への水の流入を逆止弁のようなもので遮断するといった方法でも防止可能である。ただし、機械的手段により湯や水の回り込みを防止した場合には、当該機械的手段が経年劣化にしたときに部品の交換が必要になったり、給湯機本体１１０（図１参照）の小型化を図り難くなったりする。また、上述した湯や水の回り込みは、一般給湯先１５０（図１参照）への給湯停止後に一般給湯混合弁６５を水側全開または湯側全開にしても防止することができる。ただし、一般給湯混合弁６５を水側全開または湯側全開にしておくと、一般給湯先１５０への次回の給湯時の初期に、給湯温度にボトムやピークが過渡的に生じて給湯温度が不安定になる。 For example, the hot water wraparound and the water wraparound as shown in FIG. 4 are performed by the inflow of water from the hotwater supply pipe 50 to the second watersupply pipe section 30b and the inflow of water from the second watersupply pipe section 30b to the hotwater supply pipe 50. It is also possible to prevent the problem by shutting off with a check valve or the like. However, when hot water or water wraparound is prevented by mechanical means, it is necessary to replace parts when the mechanical means has deteriorated over time, or downsizing of the water heater main body 110 (see FIG. 1). It becomes difficult to plan. In addition, the above-described hot water and water wraparound can be prevented even if the general hotwater mixing valve 65 is fully opened or the hot water side is fully opened after the hot water supply to the general hot water supply 150 (see FIG. 1) is stopped. However, if the general hotwater mixing valve 65 is fully opened on the water side or hot water side, the bottom or peak of the hot water supply temperature will transiently occur at the initial stage of the next hot water supply to the general hotwater supply destination 150, and the hot water supply temperature will not be increased. Become stable.

部品交換のコスト、給湯機本体１１０の小型化、一般給湯先１５０での給湯温度の安定性等を考慮すると、一般給湯先１５０への給湯停止中に浴槽１６０に給湯した際に生じる上述の湯や水の回り込みは、風呂給湯混合弁７０の開度に応じて一般給湯混合弁６５の開度を調整して防止することが好ましい。 Considering the cost of parts replacement, downsizing of the water heatermain body 110, stability of hot water supply temperature at the generalhot water supply 150, etc., the above-mentioned hot water generated when hot water is supplied to thebathtub 160 while hot water supply to the generalhot water supply 150 is stopped. It is preferable to prevent the sneaking of water and water by adjusting the opening of the general hot watersupply mixing valve 65 in accordance with the opening of the bath hotwater mixing valve 70.

図５は、一般給湯先への給湯停止中に浴槽に給湯するときにおける風呂給湯混合弁の開度と一般給湯混合弁での開度と浴槽への給湯温度（風呂給湯温度）との関係の一例を示すグラフである。同図中の実線は、一般給湯混合弁６５（図１参照）の開度を図３に示した第１指定待機開度γまたは第２指定待機開度δに調整して浴槽１６０へ給湯したときの風呂給湯混合弁７０（図１参照）の開度と風呂給湯温度との関係を示している。また、同図中の一点鎖線は、一般給湯混合弁６５の開度を中間開度にして浴槽１６０へ給湯したときの風呂給湯混合弁７０の開度と風呂給湯温度との関係を示しており、同図中の二点鎖線は、一般給湯混合弁６５の開度を水側全開または湯側全開にして浴槽１６０へ給湯したときの風呂給湯混合弁７０の開度と風呂給湯温度との関係を示している。 FIG. 5 shows the relationship between the opening degree of the bath hot water mixing valve, the opening degree of the general hot water mixing valve, and the hot water temperature to the bathtub (bath hot water temperature) when hot water is supplied to the bathtub while hot water supply to the general hot water supply is stopped. It is a graph which shows an example. The solid line in the figure adjusts the opening of the general hot water mixing valve 65 (see FIG. 1) to the first designated standby opening γ or the second designated standby opening δ shown in FIG. The relationship between the opening degree of the bath hot water mixing valve 70 (see FIG. 1) and the bath hot water temperature is shown. Also, the alternate long and short dash line in the figure shows the relationship between the opening of the bath hotwater mixing valve 70 and the bath hot water temperature when hot water is supplied to thebathtub 160 with the opening of the general hotwater mixing valve 65 being the intermediate opening. The two-dot chain line in the figure shows the relationship between the opening degree of the hot watersupply mixing valve 70 and the hot water supply temperature when the hotwater supply valve 65 is fully opened or the hot water side is fully opened to supply hot water to thebathtub 160. Is shown.

図５から明らかなように、風呂給湯温度を所定の温度に制御するうえからは、一般給湯混合弁６５の開度を水側全開または湯側全開にしておくことが好ましいが、一般給湯混合弁６５の開度をこのように制御すると、前述したように、一般給湯先１５０（図１参照）に断続的に給湯する際の次回の給湯時に給湯温度が不安定になる。浴槽１６０への給湯温度（風呂給湯温度）および一般給湯先１５０への給湯温度の各々を安定化させるという観点からは、一般給湯先１５０への給湯停止中に一般給湯混合弁６５の開度を中間開度、水側全開、または湯側全開にして浴槽１６０への給湯を行うよりも、図３に示した第１指定待機開度γまたは第２指定待機開度δにして浴槽１６０への給湯を行う方が好ましい。 As is apparent from FIG. 5, in order to control the bath hot water temperature to a predetermined temperature, it is preferable that the opening degree of the general hotwater mixing valve 65 is set to the water side fully open or the hot water side fully open. If the opening degree of 65 is controlled in this way, as described above, the hot water supply temperature becomes unstable at the time of the next hot water supply when intermittently supplying hot water to the general hot water supply destination 150 (see FIG. 1). From the viewpoint of stabilizing the hot water supply temperature to the bathtub 160 (bath hot water supply temperature) and the hot water supply temperature to the general hotwater supply destination 150, the opening degree of the general hotwater mixing valve 65 is set while the hot water supply to the generalhot water supply 150 is stopped. Rather than performing hot water supply to thebathtub 160 with the intermediate opening, the water side fully open, or the hot water side fully open, the first designated standby opening γ or the second designated standby opening δ shown in FIG. It is preferable to perform hot water supply.

勿論、一般給湯先１５０への給湯停止中に浴槽１６０に給湯するにあたって、給湯開始時に一般給湯混合弁６５の開度を水側全開または湯側全開にし、浴槽１６０への給湯停止後に一般給湯混合弁６５の開度を前述の安定給湯開度や初期開度に調整するという制御を行っても、浴槽１６０への給湯温度（風呂給湯温度）を安定化させることができる。 Of course, when hot water is supplied to thebathtub 160 while the hot water supply to the generalhot water supply 150 is stopped, the opening of the general hotwater mixing valve 65 is set to the fully open side on the water side or the hot water side at the start of hot water supply. Even when control is performed to adjust the opening degree of thevalve 65 to the above-described stable hot water supply opening degree or initial opening degree, the hot water supply temperature (bath hot water supply temperature) to thebathtub 160 can be stabilized.

図１に示した貯湯式給湯機１３０は、一般給湯先１５０への給湯停止中に浴槽１６０に給湯するときに、風呂給湯混合弁７０の開度に応じて一般給湯混合弁６５の開度を調整するので、一般給湯混合弁６５と風呂給湯混合弁７０とが互いに連通するように構成しても、浴槽１６０への給湯時に湯や水が一般給湯混合弁６５を通って風呂給湯混合弁７０に回り込んでしまうのを防止することができる。したがって、一般給湯先１５０への給湯が停止されているときでも浴槽１６０への給湯温度を安定させ易い。一般給湯混合弁６５の指定待機開度は、浴槽１６０への給湯温度および一般給湯先１５０への給湯温度それぞれの安定性、ならびに一般給湯混合弁６５の性能等を勘案して適宜選定される。 The hot water storagetype water heater 130 shown in FIG. 1 sets the opening degree of the general hotwater mixing valve 65 according to the opening degree of the bath hotwater mixing valve 70 when hot water is supplied to thebathtub 160 while hot water supply to the generalhot water supply 150 is stopped. Therefore, even when the general hotwater mixing valve 65 and the bath hotwater mixing valve 70 are configured to communicate with each other, hot water or water passes through the general hotwater mixing valve 65 and the bath hotwater mixing valve 70 when hot water is supplied to thebathtub 160. It is possible to prevent sneaking around. Therefore, it is easy to stabilize the hot water supply temperature to thebathtub 160 even when hot water supply to the general hotwater supply destination 150 is stopped. The designated standby opening degree of the general hotwater mixing valve 65 is appropriately selected in consideration of the stability of the hot water supply temperature to thebathtub 160 and the hot water supply temperature to the general hotwater supply destination 150, the performance of the general hotwater mixing valve 65, and the like.

一般給湯先１５０への給湯停止中に浴槽１６０に給湯するときにおける一般給湯混合弁６５の開度を調整するための手順は、特に限定されるものではなく、種々の手順を採用することができる。以下、図１または図２で用いた参照符号を適宜引用しつつ図６を参照して、上記の手順の一例を具体的に説明する。 The procedure for adjusting the opening degree of the general hotwater mixing valve 65 when hot water is supplied to thebathtub 160 while hot water supply to the generalhot water supply 150 is stopped is not particularly limited, and various procedures can be adopted. . Hereinafter, an example of the above procedure will be specifically described with reference to FIG. 6 while appropriately quoting the reference numerals used in FIG. 1 or FIG.

図６は、一般給湯先への給湯停止中に浴槽に給湯するときにおける一般給湯混合弁および風呂給湯混合弁それぞれの開度調整の手順の一例を示すフローチャートである。図示の例では、貯湯式給湯機１３０の制御装置１００（図１参照）がステップＳ１〜Ｓ１１の処理を繰り返し行って、一般給湯混合弁６５および風呂給湯混合弁７０（図１参照）それぞれの開度を制御する。 FIG. 6 is a flowchart showing an example of procedures for adjusting the opening degrees of the general hot water mixing valve and the bath hot water mixing valve when hot water is supplied to the bathtub while hot water supply to the general hot water supply is stopped. In the illustrated example, the control device 100 (see FIG. 1) of the hot water storage typehot water heater 130 repeats the processes of steps S1 to S11 to open each of the general hotwater mixing valve 65 and the bath hot water mixing valve 70 (see FIG. 1). Control the degree.

最初に行われるステップＳ１は、一般給湯先１５０への給湯および浴槽１６０（図１参照）への給湯の各々が一定時間以上停止されている初期状態下で始められる。このステップＳ１では、一般用流量センサ７３（図１参照）の検知結果に基づいて、一般給湯先１５０への給湯（以下、「一般給湯」と略記する）が行われているか否かを制御装置１００の給湯制御部９３ｂ（図２参照）が判断する。当該ステップＳ１で一般給湯が行われていないと判断されたときには該ステップＳ１を繰り返し、一般給湯が行われていると判断されたときにはステップＳ２に進む。 Step S1 performed first is started under an initial state in which each of hot water supply to the general hotwater supply destination 150 and hot water supply to the bathtub 160 (see FIG. 1) is stopped for a predetermined time or more. In this step S1, based on the detection result of the general flow sensor 73 (see FIG. 1), it is determined whether or not hot water supply to the general hot water supply destination 150 (hereinafter abbreviated as “general hot water supply”) is performed. 100 hot watersupply control unit 93b (see FIG. 2) determines. When it is determined that the general hot water supply is not performed in step S1, the step S1 is repeated, and when it is determined that the general hot water supply is performed, the process proceeds to step S2.

ステップＳ２では、記憶部９５（図２参照）に格納されている上記給湯温度に係る情報と、タンク温度センサ２０ａ、給水温度センサ２５、および一般用温度センサ７５（図１参照）それぞれの検知温度とを用いて、一般給湯先１５０への給湯温度がユーザによる設定温度となるように給湯制御部９３ｂが一般給湯混合弁６５の開度を調整する。 In step S2, information related to the hot water temperature stored in the storage unit 95 (see FIG. 2) and the detected temperatures of thetank temperature sensor 20a, the feedwater temperature sensor 25, and the general temperature sensor 75 (see FIG. 1). The hot watersupply control unit 93b adjusts the opening degree of the general hot watersupply mixing valve 65 so that the hot water supply temperature to the general hotwater supply destination 150 becomes the temperature set by the user.

次いで行われるステップＳ３では、一般用流量センサ７３の検知結果に基づいて、一般給湯が停止されたか否かを給湯制御部９３ｂが判断する。このステップＳ３で一般給湯が停止されていないと判断されたときにはステップＳ２に戻って該ステップＳ２以降を繰り返すことで一般給湯先１５０への給湯温度をフィードバック制御し、一般給湯が停止されたと判断されたときには、給湯制御部９３ｂが計時部９３ｃ（図２参照）に計時を開始させてステップＳ４に進む。 Next, in step S3, the hot watersupply control unit 93b determines whether or not the general hot water supply is stopped based on the detection result of thegeneral flow sensor 73. When it is determined in step S3 that the general hot water supply is not stopped, the process returns to step S2 and repeats step S2 and subsequent steps to feedback control the hot water supply temperature to the general hotwater supply destination 150, and it is determined that the general hot water supply is stopped. If hot water is supplied, the hot watersupply control unit 93b causes thetime measuring unit 93c (see FIG. 2) to start measuring time, and proceeds to step S4.

ステップＳ４では、記憶部９５に格納されている一般給湯先１５０（図１参照）への給湯温度に係る情報に基づいて、給湯制御部９３ｂが一般給湯混合弁６５の開度を安定給湯開度に調整する。あるいは、ステップＳ２で調整した一般給湯混合弁６５の開度に係る情報を給湯制御部９３ｂが記憶部９５（図２参照）に格納し、該情報に基づいて、ステップＳ４で給湯制御部９３ｂが一般給湯混合弁６５の開度を安定給湯開度に調整するように貯湯式給湯機１３０（図１参照）を構成してもよい。 In step S4, based on the information related to the hot water supply temperature to the general hot water supply 150 (see FIG. 1) stored in thestorage unit 95, the hot watersupply control unit 93b determines the opening degree of the general hotwater mixing valve 65 as the stable hot water supply opening degree. Adjust to. Alternatively, information relating to the opening degree of the general hotwater mixing valve 65 adjusted in step S2 is stored in the storage unit 95b (see FIG. 2) by the hot watersupply control unit 93b, and based on the information, the hot watersupply control unit 93b in step S4. You may comprise the hot water storage type hot water supply machine 130 (refer FIG. 1) so that the opening degree of the general hot watersupply mixing valve 65 may be adjusted to the stable hot water supply opening degree.

次いで行われるステップＳ５では、一般給湯待機時間が経過したか否かを計時部９３ｃの計時結果に基づいて給湯制御部９３ｂが判断する。このステップＳ５で一般給湯待機時間が経過したと判断されたときには給湯制御部９３ｂが計時部９３ｃの計時結果をクリアしてステップＳ６に進み、一般給湯待機時間が経過していないと判断されたときにはステップＳ７に進む。 Next, in step S5 to be performed, the hot watersupply control unit 93b determines whether or not the general hot water supply standby time has elapsed based on the time measurement result of thetime measuring unit 93c. When it is determined in step S5 that the general hot water supply standby time has elapsed, the hot watersupply control unit 93b clears the time measurement result of thetime measuring unit 93c and proceeds to step S6, and when it is determined that the general hot water supply standby time has not elapsed. Proceed to step S7.

ステップＳ６では、給湯制御部９３ｂが一般給湯混合弁６５の開度を初期開度に調整して、一般給湯混合弁６５の開度調整を一旦終了し、前述した初期状態に戻る。一方、ステップＳ７では、浴槽１６０への給湯（以下、「風呂給湯」と略記する）が行われているか否かを給湯制御部９３ｂが判断する。この判断は、例えば給湯制御部９３ｂが電磁弁８３に開指令を出したか否かに基づいて行われる。当該ステップＳ７で風呂給湯が行われていないと判断されたときには後述するステップＳ１１に進み、風呂給湯が行われていると判断されたときにはステップＳ８に進む。 In step S6, the hotwater supply controller 93b adjusts the opening degree of the general hotwater mixing valve 65 to the initial opening degree, temporarily ends the adjustment of the opening degree of the general hotwater mixing valve 65, and returns to the initial state described above. On the other hand, in step S7, the hot watersupply control unit 93b determines whether or not hot water supply to the bathtub 160 (hereinafter abbreviated as “bath hot water supply”) is performed. This determination is made based on, for example, whether or not the hot watersupply control unit 93b issues an opening command to theelectromagnetic valve 83. When it is determined in step S7 that bath hot water is not being performed, the process proceeds to step S11 described later, and when it is determined that bath hot water is being performed, the process proceeds to step S8.

ステップＳ８では、浴槽１６０への給湯温度がユーザによる設定温度となるよう、記憶部９５（図２参照）に格納されている浴槽１６０への給湯温度に係る情報と、タンク温度センサ２０ａ、給水温度センサ２５、および風呂用温度センサ８７（図１参照）それぞれの検知温度とを用いて、給湯制御部９３ｂが風呂給湯混合弁７０の開度を調整する。 In step S8, the information related to the hot water temperature to thebathtub 160 stored in the storage unit 95 (see FIG. 2), thetank temperature sensor 20a, and the hot water temperature so that the hot water temperature to thebathtub 160 becomes the temperature set by the user. The hotwater supply controller 93b adjusts the opening degree of the hot watersupply mixing valve 70 using thesensor 25 and the detected temperature of the bath temperature sensor 87 (see FIG. 1).

次いで行われるステップＳ９では、風呂給湯混合弁７０の開度と、記憶部９５に格納されている指定待機開度に係る情報と、指定待機開度に対応する風呂給湯混合弁７０の開度および該開度での水の混合比率に係る情報とに基づいて、給湯制御部９３ｂが一般給湯混合弁６５の開度を指定待機開度に調整する。その結果として、湯や水が一般給湯混合弁６５を通って風呂給湯混合弁７０側に回り込んでしまうことが抑えられて、浴槽１６０への給湯温度が安定する。 Next, in step S9 to be performed, the opening degree of the bath / hotwater mixing valve 70, information on the designated standby opening degree stored in thestorage unit 95, the opening degree of the bath / hotwater mixing valve 70 corresponding to the designated standby opening degree, and Based on the information related to the mixing ratio of water at the opening, the hot watersupply control unit 93b adjusts the opening of the general hotwater mixing valve 65 to the designated standby opening. As a result, hot water or water is prevented from flowing around the hot water / hotwater mixing valve 70 through the general hot water / mixingvalve 65, and the hot water temperature to thebathtub 160 is stabilized.

次いで行われるステップＳ１０では、風呂給湯が停止されたか否かを給湯制御部９３ｂが判断する。この判断は、例えば給湯制御部９３ｂが電磁弁８３に閉指令を出したか否かに基づいて行われる。当該ステップＳ１０で風呂給湯が停止されていないと判断されたときにはステップＳ８に戻って該ステップＳ８以降を繰り返すことで浴槽１６０への給湯温度をフィードバック制御し、風呂給湯が停止されたと判断されたときには風呂給湯混合弁７０の開度を初期状態に調整して前述のステップＳ４に戻り、該ステップＳ４以降を繰り返す。 Next, in step S10 performed, the hot watersupply control unit 93b determines whether or not the bath hot water supply is stopped. This determination is made based on, for example, whether or not the hot watersupply control unit 93b issues a close command to theelectromagnetic valve 83. When it is determined in step S10 that bath hot water supply is not stopped, the process returns to step S8 and repeats step S8 and subsequent steps to feedback control the hot water supply temperature to thebathtub 160, and when it is determined that bath hot water supply is stopped. The opening degree of the bath / hotwater mixing valve 70 is adjusted to the initial state, the process returns to the above-described step S4, and the steps after step S4 are repeated.

一方、前述したステップＳ７で風呂給湯が行われていないと判断されてステップＳ１１に進んだときには、ステップＳ１におけるのと同様にして、一般給湯が行われているか否かを給湯制御部９３ｂが判断する。このステップＳ１１で一般給湯が行われていないと判断されたときにはステップＳ４に戻って該ステップＳ４以降を繰り返し、一般給湯が行われていると判断されたときにはステップＳ２に戻って該ステップＳ２以降を繰り返す。 On the other hand, when it is determined in step S7 that bath hot water supply is not performed and the process proceeds to step S11, the hot watersupply control unit 93b determines whether or not general hot water supply is performed in the same manner as in step S1. To do. When it is determined that the general hot water supply is not performed in step S11, the process returns to step S4 and repeats the steps after step S4. When it is determined that the general hot water supply is performed, the process returns to step S2 and the processes after step S2 are performed. repeat.

以上、本発明の貯湯式給湯機について実施の形態を挙げて説明したが、前述のように、本発明は上記の形態に限定されるものではない。本発明の貯湯式給湯機は、貯湯タンク内の湯を出湯側が二股分岐した給湯管路により一般給湯混合弁と風呂給湯混合弁とに供給すると共に、水源からの水を出水側が二股分岐した給水管路により一般給湯混合弁と風呂給湯混合弁とに供給し、一般給湯混合弁から一般給湯先への給湯停止中に風呂給湯混合弁から浴槽に給湯するときには一般給湯混合弁の開度を調整して、上述した湯や水の回り込みを抑えるものであれば基本的によい。一般給湯混合弁の開度を調整して湯や水の回り込みを防止する機能以外は適宜変更可能である。 As mentioned above, although the hot water storage type hot water heater of the present invention has been described with reference to the embodiment, as described above, the present invention is not limited to the above embodiment. The hot water storage type hot water supply apparatus of the present invention supplies hot water in a hot water storage tank to a general hot water mixing valve and a bath hot water mixing valve through a hot water supply pipe branched on the outlet side, and water supplied from the water source to the outlet side. Supply to general hot water mixing valve and bath hot water mixing valve by pipe, and adjust the opening of general hot water mixing valve when supplying hot water from bath hot water mixing valve to bathtub while hot water supply from general hot water mixing valve to general hot water destination is stopped Thus, it is basically good as long as it suppresses the above-mentioned hot water and water from flowing around. Other than the function of adjusting the opening degree of the general hot water supply mixing valve to prevent hot water or water from flowing around, it can be changed as appropriate.

例えば、水を湯に沸き上げる熱源機としては、ヒートポンプユニット以外に、電熱式のヒータやガス燃焼装置等を用いることもできる。熱源機は、その種類に応じて、貯湯タンクの外側または貯湯タンクの内側に配置される。また、貯湯タンクに貯留した湯を熱源として用いる熱交換器を設け、該熱交換器により浴槽や温水式床暖房装置で用いられて温度低下した湯を再加熱する機能を付加することもできる。 For example, as a heat source device for boiling water into hot water, an electrothermal heater, a gas combustion device, or the like can be used in addition to the heat pump unit. The heat source device is arranged outside the hot water storage tank or inside the hot water storage tank depending on the type. Moreover, the heat exchanger which uses the hot water stored in the hot water storage tank as a heat source can be provided, and the function which reheats the hot water used by the heat exchanger by the bathtub or the hot water type floor heating apparatus can be added.

一般給湯混合弁の開度を調整して湯や水の回り込みを防止する機能の具体的な設定についても、適宜変更可能である。例えば、実施の形態で説明した貯湯式給湯機は、一般給湯混合弁の指定待機開度が「γ」と「δ」の２種類のものであるが、当該指定待機開度の数は３以上の所望数とすることもできる。また、各指定待機開度は固定値に限定されるものではなく、タンク温度センサ２０ａの検知温度、給水温度センサ２５の検知温度、および浴槽１６０（図１参照）への給湯温度等に応じて給湯制御部９３ｂ（図２参照）が演算により算出してもよい。 The specific setting of the function of adjusting the opening of the general hot water supply mixing valve to prevent hot water or water from entering can be changed as appropriate. For example, the hot water storage type hot water heater described in the embodiment has two types of designated standby openings “γ” and “δ” of the general hot water mixing valve, but the number of designated standby openings is 3 or more. The desired number can also be made. Each designated standby opening is not limited to a fixed value, and depends on the detected temperature of thetank temperature sensor 20a, the detected temperature of the watersupply temperature sensor 25, the hot water supply temperature to the bathtub 160 (see FIG. 1), and the like. The hot watersupply control unit 93b (see FIG. 2) may calculate by calculation.

また、実施の形態で説明した風呂給湯混合弁での水の混合比率「α」、「β」は、湯水の回り込みを抑えるという効果をより発揮するうえからは、例えば水側全開と湯側全開との中間となる開度位置を境にして「α」を水側全開寄りに設定し、「β」を湯側全開寄りに設定することが好ましい。実施の形態で説明した一般給湯混合弁の指定待機開度「γ」、「δ」の各々に関しても同様であり、水側全開と湯側全開との中間となる開度位置を境にして「γ」を水側全開寄りに設定し、「δ」を湯側全開寄りに設定することが好ましい。 In addition, the water mixing ratios “α” and “β” in the bath hot water mixing valve described in the embodiment are more effective in suppressing the circulation of hot water, for example, the water side fully open and the hot water side fully open. It is preferable that “α” is set to close to the water side fully open and “β” is set to close to the hot water side at the opening position that is in the middle. The same applies to each of the designated standby opening degrees `` γ '' and `` δ '' of the general hot water mixing valve described in the embodiment, with the opening position being an intermediate position between the water side fully open and the hot water side fully open as a boundary. It is preferable that “γ” is set close to the water side fully open and “δ” is set close to the hot water side fully open.

実施の形態では一般給湯待機時間が経過するまでの間に浴槽への給湯があったときにだけ一般給湯混合弁の開度を指定待機開度としたが、一般給湯先への給湯停止中に浴槽に給湯する場合は常に、一般給湯混合弁の開度を所定の指定待機開度に調整するように貯湯式給湯機を構成してもよい。本発明については、上述した以外にも種々の変形、修飾、組み合わせ等が可能である。 In the embodiment, the opening degree of the general hot water mixing valve is set as the designated standby opening degree only when there is hot water supply to the bathtub before the general hot water supply standby time elapses. Whenever hot water is supplied to the bathtub, the hot water storage type hot water heater may be configured so that the opening degree of the general hot water supply mixing valve is adjusted to a predetermined designated standby opening degree. The present invention can be variously modified, modified and combined in addition to the above.

本発明の貯湯式給湯機は、家庭用および業務用の給湯機として好適に用いることができる。 The hot water storage type hot water heater of the present invention can be suitably used as a domestic and commercial hot water heater.

１０ヒートポンプユニット（熱源機）
２０貯湯タンク
３０給水管路
３０ａ第１給水管部
３０ｂ第２給水管部（出水側が二股分岐した給水管路）
３０ｃ第３給水管部
４０貯湯用循環管路
５０給湯管路（出湯側が二股分岐した給湯管路）
６５一般給湯混合弁
７０風呂給湯混合弁
８０一般用給湯管路
９０風呂用給湯管路
９３制御部
９３ａ沸上げ制御部
９３ｂ給湯制御部
９３ｃ計時部
１００制御装置
１１０給湯機本体
１２０リモートコントローラ
１３０貯湯式給湯機
１５０一般給湯先
１６０浴槽
γ 第１指定待機開度
δ 第２指定待機開度10 Heat pump unit (heat source machine)
20 Hotwater storage tank 30Water supply line 30a 1st watersupply pipe part 30b 2nd water supply pipe part (water supply line where the water discharge side branched into two branches)
30c 3rd watersupply pipe part 40 Hot waterstorage circulation line 50 Hot water supply line (hot water supply line with bifurcated outlet side)
65 General Hot WaterSupply Mixing Valve 70 Bath Hot WaterSupply Mixing Valve 80 General HotWater Supply Pipeline 90 Hot Water Supply Pipeline forBath 93Control Unit 93aBoiling Control Unit 93b Hot WaterSupply Control Unit93c Timekeeping Unit 100Controller 110 HotWater Supply Body 120Remote Controller 130 Hot Water Storage TypeHot water heater 150 General hotwater supply destination 160 Bathtub γ First designated standby opening δ Second designated standby opening

Claims

Translated fromJapanese

前記制御装置は、前記一般給湯先への給湯停止中に前記浴槽に給湯するにあたって前記風呂給湯混合弁での湯の混合比率が水の混合比率よりも高くなるように該風呂給湯混合弁の開度を調整するときには、前記一般給湯混合弁での湯の混合比率が水の混合比率よりも高くなるように該一般給湯混合弁の開度を調整することを特徴とする請求項１に記載の貯湯式給湯機。 The control device opens the bath hot water mixing valve so that the hot water mixing ratio in the bath hot water mixing valve is higher than the water mixing ratio when hot water is supplied to the bathtub while hot water supply to the general hot water supply is stopped. When adjusting the degree, the opening degree of the general hot water mixing valve is adjusted so that the mixing ratio of hot water in the general hot water mixing valve is higher than the mixing ratio of water. Hot water storage water heater.

前記制御装置は、前記浴槽への給湯停止後に、前記一般給湯混合弁の開度を前記一般給湯先への給湯温度に対応した開度に調整すること特徴とする請求項１〜５のいずれか１つに記載の貯湯式給湯機。 The said control apparatus adjusts the opening degree of the said general hot water supply mixing valve to the opening degree corresponding to the hot water supply temperature to the said general hot water supply destination after the hot water supply to the said bathtub is stopped. The hot water storage type water heater according to one.