CN109323448B - Constant-temperature hot water circulating device and control method thereof - Google Patents

Abstract

A constant temperature hot water circulating device and its control method, the constant temperature hot water circulating device includes hot water circulation assembly and its water pump, one end of the water pump connects with water route connecting pipe and constant temperature pot sequentially, another end of the water pump connects with water inlet connector and temperature pick-up sequentially, the constant temperature pot includes upper tank body and lower tank body, one end of water pump and upper tank body interconnects; wherein, the upper tank body and the lower tank body are mutually connected, and a grid is arranged between the upper tank body and the lower tank body; the hot water circulation assembly further includes a controller and a power cord plug. The water circulating assembly with the constant temperature tank is used in combination with the gas water heater, so that the problem that the temperature difference of the outlet water of the gas water heater is large is avoided, meanwhile, the temperature sensor is arranged between the gas water heater and the water circulating assembly, the outlet water temperature of the gas water heater is detected in real time, and the water pump of the water circulating assembly is further controlled by detecting the outlet water temperature of the gas water heater.

Description

Constant-temperature hot water circulating device and control method thereof

Technical Field

The invention relates to a hot water circulating device, in particular to a constant-temperature hot water circulating device and a control method thereof.

Background

The hot water circulation device is commonly used in a household central hot water system to realize a zero-cold-water function. The device provides 24-hour hot water supply for families, and bathing does not need waiting, thereby greatly saving water resources. A common hot water circulating device is generally arranged at a water inlet of a gas water heater, a water pump is started when a starting condition is met, and cold water enters the gas water heater to be heated, so that hot water circulation is completed. Because the water is heated in the gas water heater, the outlet water temperature is influenced by the performance of the gas water heater and has larger influence.

When the temperature of inlet water is higher in summer, if the temperature set by a user is 40 ℃, but the actual outlet water temperature can reach 50 ℃, the overtemperature phenomenon occurs. When the temperature of intaking was lower winter, gas heater need heat the certain time, has some cold water to flow to the water spot through hot water circulating device this moment, is unfavorable for user's shower to experience. The hot water circulating device can not solve the problem of non-constant temperature phenomena such as temperature fluctuation and the like while realizing instant heating of boiled water, which brings great trouble to users. Chinese patent document No. CN108458487A discloses an intelligent hot water circulation device and system and a control method thereof, the hot water circulation device includes a water tank and has a cold water inlet, a circulation outlet, a circulation inlet, a circulation water return port and a hot water outlet; the water tank is provided with a hot water port, a water outlet, a circulating cold water port and an electric heating device; the cold water source is connected with a first interface of the electric three-way valve through a cold water inlet and two interfaces of the electric three-way valve, a second interface of the electric three-way valve is connected with a circulating cold water port, and a third interface of the three-way valve is connected with a circulating water return port through a circulating pump; a third interface of the electric three-way valve is connected with a low-temperature inlet through a circulating outlet, a hot water port is connected with a high-temperature outlet through the circulating inlet, and a water outlet is connected with a water using point through a hot water pipe after passing through the hot water outlet; the hot water pipe adjacent to the water consumption point is branched into a water return pipe connected with a circulating water return port. The arrangement is complicated. Therefore, further improvements are desired.

Disclosure of Invention

The invention aims to provide a constant-temperature hot water circulating device and a control method thereof, wherein the constant-temperature hot water circulating device is reasonable in arrangement structure, low in manufacturing cost and simple and flexible in operation, effectively solves the problem that the hot water circulating device is influenced by a gas water heater to cause unstable outlet water temperature, and improves the bathing experience of a user, so that the defects in the prior art are overcome.

The constant-temperature hot water circulating device comprises a hot water circulating assembly and a water pump thereof, wherein one end of the water pump is sequentially connected with a water path connecting pipe and a constant-temperature tank, the other end of the water pump is sequentially connected with a water inlet connector and a temperature sensor, the constant-temperature tank comprises an upper tank body and a lower tank body, and one end of the water pump is connected with one end of the upper tank body; the upper tank body and the lower tank body are connected with each other, a grid is arranged between the upper tank body and the lower tank body, the grid has the function of blocking water flow, and water in the upper tank body is prevented from directly flowing to the lower tank body; when water flows to the water pump through the water inlet connector, the temperature sensor detects the temperature of the water flow in real time.

The hot water circulation assembly further includes a controller and a power cord plug. The hot water circulation assembly is connected with a socket in a user's home through a power cord plug, and after the hot water circulation assembly is electrified, the user controls the hot water circulation assembly through the controller.

The controller comprises a front shell, a control panel and a rear shell which are sequentially connected with each other.

The controller is provided with control panel, and control panel sets up on the shell in the front, and control panel is provided with a plurality of control button, and control button includes power key, cruise key, temperature rise, fall key, reservation operating duration key and timing key.

Go up jar body bottom and be provided with annular protruding muscle, lower jar body top corresponds annular protruding muscle and is provided with annular groove, annular protruding muscle and the mutual lock of annular groove.

The water inlet end is arranged at the top end of the upper tank body, the water inlet end is connected with the water pump, the water outlet end is arranged at the bottom end of the lower tank body, the grid is provided with a solid part corresponding to the water inlet end, and the solid part and the water inlet end are aligned with each other. When rivers flow to the grid through last jar body, because of the end of intaking of the solid portion of grid and last jar body aligns each other, rivers and solid portion produce collision each other, and rivers form the backward flow, then under the water pressure effect, through the water hole, after the efflux of formation columnar formula, the jar body under the flow direction mixes with the water of the jar body down. Go up the end of intaking of jar body and water pump interconnect, rivers obtain the energy when the water pump, and pressure increase, the high pressure water flow in the constant temperature jar and mix more evenly.

And a plurality of water passing holes which are mutually spaced are uniformly distributed on the grid along the outer side of the solid part.

The water inlet of the gas water heater is connected with a tap water device, a first control valve and a second control valve are connected between the tap water device and the gas water heater, the water outlet of the gas water heater is connected with the water inlet connector of the hot water circulation assembly, the water outlet end of the lower tank body is sequentially connected with a third control valve and more than one water consumption point, one end of the water consumption point is connected with a one-way valve, and the one-way valve is connected with the first control valve and/or the second control valve.

The control method of the constant-temperature hot water circulating device designed according to the purpose comprises the constant-temperature hot water circulating device and a wireless controller externally arranged on a hot water circulating component, wherein a user controls a water pump of the hot water circulating component through the wireless controller, and the control method comprises the following steps: a. the hot water circulation assembly and the gas water heater are respectively communicated with a power supply, and the hot water circulation assembly firstly carries out standby detection; b. the user is provided with the reserved operation time and the set temperature through the wireless controller, then the wireless controller sends a starting instruction to the hot water circulation assembly, c, after the hot water circulation assembly receives the instruction, the water pump of the hot water circulation assembly is started, hot water in the gas water heater flows to the water pump through the water inlet connector, d, the water inlet temperature of the water pump is detected through the temperature sensor, e, the temperature sensor transmits the information of the water inlet temperature to the wireless controller, if the water inlet temperature is larger than or equal to the set temperature, the wireless controller calculates the stop time of the water pump after the water inlet temperature reaches the set temperature, if the stop time is larger than or equal to the reserved operation time, the wireless controller sends a stop instruction to the hot water circulation assembly, the hot water circulation assembly.

The water pump control system further comprises a controller arranged on the hot water circulation assembly, a user manually controls the water pump of the hot water circulation assembly through the controller, and the control method comprises the following steps: a. the hot water circulation assembly and the gas water heater are respectively communicated with a power supply, and the hot water circulation assembly firstly carries out standby detection; b. a user sets a reserved operation time and a set temperature through a controller, then the controller manually controls the water pump to start, c, hot water in the gas water heater flows to the water pump through a water inlet connector, d, a temperature sensor detects the water inlet temperature of the water pump, if the water inlet temperature is larger than or equal to the set temperature, the controller calculates the stop time of the water pump after the water inlet temperature reaches the set temperature, and if the stop time is larger than or equal to the reserved operation time, the controller controls the water pump to stop working.

The hot water circulation assembly is provided with the constant temperature tank, the hot water circulation assembly with the constant temperature tank is used in combination with the gas water heater, the water temperature fluctuation of the hot water circulation assembly in different climates is effectively alleviated, the large numerical difference between the outlet water temperature and the set temperature is avoided, the outlet water constant temperature is ensured, the bathing experience of a user is improved, meanwhile, the temperature sensor is arranged between the gas water heater and the hot water circulation assembly, the outlet water temperature of the gas water heater is detected in real time, and the water pump of the hot water circulation assembly is further controlled by detecting the outlet water temperature of the gas water heater. The structure is simple and convenient to install, low in manufacturing cost, capable of achieving wireless control operation and manual control operation and capable of increasing operation experience of users.

Drawings

Fig. 1 is a schematic structural diagram of a circulation assembly according to an embodiment of the present invention.

Fig. 2 is an exploded view of a controller according to an embodiment of the invention.

Fig. 3 is a schematic diagram of a control panel structure of a controller according to an embodiment of the present invention.

Fig. 4 is an exploded view of the thermostat tank according to an embodiment of the present invention.

Fig. 5 is a schematic structural diagram of a grid according to an embodiment of the invention.

Fig. 6 is a schematic cross-sectional structure view of a constant temperature tank according to an embodiment of the present invention.

Fig. 7 is a schematic structural view illustrating the interconnection of the gas water heater and the hot water circulation module according to an embodiment of the present invention.

Fig. 8 is a schematic view illustrating the operation flow of the water pump of the hot water circulation unit controlled by the wireless controller according to an embodiment of the present invention.

Fig. 9 is a schematic diagram illustrating the operation of the water pump of the hot water circulation unit controlled by the controller according to an embodiment of the present invention.

In the figure, 1 is a hot water circulation component, 2 is a water pump, 3 is a water path connecting pipe, 4 is a constant temperature tank, 4.1 is an upper tank body, 4.2 is a grid, 4.3 is a lower tank body, 4.4 is a water inlet end, 4.5 is a water outlet end, 4.6 is a water through hole, 4.7 is an annular convex rib, 4.8 is an annular groove, 4.9 is a solid part, 5 is a water inlet joint, 6 is a temperature sensor, 7 is a controller, 7.1 is a front shell, 7.2 is a control plate, 7.3 is a rear shell, 7.4 is a control panel, 7.5 is a key, 8 is a power cord plug, 9 is a gas water heater, 10 is a wireless controller, 11 is a tap water device, 12 is a first control valve, 13 is a second control valve, 14 is a third control valve, 15 is a first water point, 16 is a second water point, 17 is a one-way valve, T is a water inlet temperature, Ts is a set temperature, T is a stop time, T_sTo reserve the run time.

Detailed Description

The invention is further described with reference to the following figures and examples.

Referring to fig. 1-6, a constant temperature hot water circulating device comprises a hotwater circulating assembly 1 and awater pump 2 thereof, wherein one end of thewater pump 2 is sequentially connected with a waterpath connecting pipe 3 and aconstant temperature tank 4, the other end of thewater pump 2 is sequentially connected with awater inlet joint 5 and atemperature sensor 6, theconstant temperature tank 4 comprises an upper tank body 4.1 and a lower tank body 4.3, and one ends of thewater pump 2 and the upper tank body 4.1 are connected with each other; wherein, the upper tank body 4.1 and the lower tank body 4.3 are mutually connected, and a grating 4.2 is arranged between the upper tank body and the lower tank body. The hotwater circulation assembly 1 further includes acontroller 7 and apower cord plug 8. Thecontroller 7 comprises a front housing 7.1, a control panel 7.2 and a rear housing 7.3 which are connected to one another in sequence. Thecontroller 7 is provided with a control panel 7.4, the control panel 7.4 is arranged on the front shell 7.1, and the control panel 7.4 is provided with a plurality of control keys 7.5. The bottom end of the upper tank body 4.1 is provided with an annular convex rib 4.7, the top end of the lower tank body 4.3 is provided with an annular groove 4.8 corresponding to the annular convex rib 4.7, and the annular convex rib 4.7 and the annular groove 4.8 are buckled with each other. The water inlet device further comprises a water inlet end 4.4 arranged at the top end of the upper tank body 4.1, the water inlet end 4.4 is connected with thewater pump 2, a water outlet end 4.5 is arranged at the bottom end of the lower tank body 4.3, the grille 4.2 is provided with a solid part 4.9 corresponding to the water inlet end 4.4, and the solid part 4.9 is aligned with the water inlet end 4.4. The grille 4.2 is uniformly provided with a plurality of water through holes 4.6 which are mutually spaced along the outer side of the solid part 4.9.

Further, theconstant temperature tank 4 works according to the following principle: as shown in fig. 6, the arrows represent the direction of water flow. Rivers are through intaking 4.5 and flow into the last jar body 4.1 back ofconstant temperature jar 4, and rivers collision barrier 4.2's solid portion 4.9, and rivers produce backward flow after being obstructed, then under the water pressure effect, flow into down jar body 4.3 through the water hole 4.6 of crossing of barrier 4.2, and rivers are finally through the play water end 4.5 outflow of the jar body 4.3 down. According to the process, water is mixed twice in the process from inflow to outflow: the first mixed water is generated in the upper tank body 4.1, after the water flow collides with the solid part 4.9 of the barrier 4.2, upward backflow is generated, the backflow water is contacted with the inner wall of the upper tank body 4.1 to generate secondary collision, the water flows to the barrier 4.2 again, and at the moment, the water flowing into the water inlet end 4.4 is primarily mixed with the water in the upper tank body 4.1; the second time mixes the water and produces in lower jar of body 4.3, and rivers form the efflux of column form after a plurality of water holes 4.4 of retainer 4.2, stirs the water in the lower jar of body 4.3, makes the water mixing more even. In the water mixing process, due to the separation of the barrier 4.2, the flow velocity of water flow is reduced, and through backflow, the pressure is increased, so that higher pressure is provided for the water passing hole 4.4 flowing through the barrier 4.2, the jet phenomenon is more obvious, and the water mixing effect is better.

Referring to fig. 7, a water inlet of the gas water heater 9 is connected with a tap water device 11, afirst control valve 12 and a second control valve 13 are connected between the water inlet and the tap water device, a water outlet of the gas water heater 9 is connected with awater inlet joint 5 of the hotwater circulation assembly 1, a water outlet end 4.5 of the lower tank 4.3 is sequentially connected with a third control valve 14, a first water point 15 and a second water point 16, one end of the second water point 16 is connected with a one-way valve 17, and the one-way valve 17 is connected with thefirst control valve 12 and/or the second control valve 13. The direction of the tap water flow to the gas water heater 9 is shown by the arrows in fig. 7.

Referring to fig. 8, a control method of a constant temperature hot water circulation device includes the constant temperature hot water circulation device, and further includes a wireless controller 10 externally disposed on the hotwater circulation component 1, a user controls thewater pump 2 of the hotwater circulation component 1 through the wireless controller 10, and the control method includes: a. the hotwater circulation component 1 and the gas water heater 9 are respectively communicated with a power supply, and the hotwater circulation component 1 firstly carries out standby detection; b. the user sets the scheduled operation time t through the wireless controller 10_sAnd a set temperature Ts, then the wireless controller 10 sends a starting instruction to the hotwater circulation component 1, c, after the hotwater circulation component 1 receives the instruction, thewater pump 2 of the hotwater circulation component 1 is started, hot water in the gas water heater 9 flows to thewater pump 2 through thewater inlet connector 5, d, thetemperature sensor 6 detects the water inlet temperature T of thewater pump 2, e, thetemperature sensor 6 transmits the information of the water inlet temperature T to the wireless controller 10, if the water inlet temperature T is not less than the set temperature Ts, the wireless controller 10 calculates the stop time T of thewater pump 2 after the water inlet temperature T reaches the set temperature Ts, and if the stop time T is not less than the reserved operation time T_sThe wireless controller 10 sends a stop command to the hotwater circulation module 1, and the hotwater circulation module 1 receives the command, and thewater pump 2 stops working.

Referring to fig. 9, acontroller 7 is further included in the hotwater circulation assembly 1, and a user manually controls thewater pump 2 of the hotwater circulation assembly 1 through thecontroller 7 by: a. the hotwater circulation component 1 and the gas water heater 9 are respectively communicated with a power supply, and the hotwater circulation component 1 firstly carries out standby detection; b. the user sets the reserved operating time t through thecontroller 7_sAnd a set temperature T_sThen thewater pump 2 is manually controlled to start through thecontroller 7, hot water in the c gas water heater 9 flows to thewater pump 2 through thewater inlet joint 5, thed temperature sensor 6 detects the water inlet temperature T of thewater pump 2, and if the water inlet temperature T is larger than or equal to the set temperatureThe temperature Ts, thecontroller 7 calculates the stop time T of thewater pump 2 after the inlet water temperature T reaches the set temperature Ts, and if the stop time T is more than or equal to the reserved operation time T_sThecontroller 7 controls thewater pump 2 to stop operating.

Specifically, the method comprises the following steps: water of a tap water device 11 sequentially enters a gas water heater 9 through a second control valve 13 and afirst control valve 12, the gas water heater 9 heats tap water, hot water of the gas water heater 9 enters a hotwater circulation assembly 1 through awater inlet joint 5, the hot water is mixed with water and adjusted in temperature through aconstant temperature tank 4 of the hotwater circulation assembly 1, then the hot water sequentially flows to a first water point 15 and a second water point 16 through a third control valve 14, and the first water point 15 and the second water point 16 are connected with the gas water heater 9 through a one-way valve 17, thefirst control valve 12 and the second control valve 13 to form a circulating heating device. When hot water of the gas water heater 9 enters the hotwater circulating assembly 1 through thewater inlet joint 5, thetemperature sensor 6 detects whether the water inlet temperature T (namely the hot water temperature of the gas water heater 9) of the gas water heater 9 entering thewater pump 2 is larger than or equal to the set temperature Ts of the circulatingassembly 1, if the water inlet temperature T is larger than or equal to the set temperature Ts, thecontroller 7 or the wireless controller 10 calculates the stop time T of thewater pump 2 after the water inlet temperature T reaches the set temperature Ts, and if the water inlet temperature T is smaller than the set temperature Ts, the gas water heater 9 continues to feed water; wherein, if the stop time t is more than or equal to the reserved operation time t_sWhen thewater pump 2 stops working, the gas water heater 9 does not feed water any more, and if the stop time t is less than the reserved operation time t_sThe gas water heater 9 continues to feed water to the hotwater circulation assembly 1 through thewater pump 2.

Furthermore, the hotwater circulation assembly 1 with thethermostatic pot 4 combines the working principle of the gas water heater 9: a. when the gas water heater works normally, the water temperature in the water outlet pipe of the gas water heater 9 is consistent with the water temperature in theconstant temperature tank 4 of the hotwater circulation component 1; b. when the temperature of water in a water outlet pipe of the gas water heater 9 is increased or decreased, the temperature difference between the water and the water in theconstant temperature tank 4 is generated; c. when water flows into thethermostatic tank 4, the temperature of the water flowing into thethermostatic tank 4 is reduced or increased by utilizing the heat convection of the cold water and the hot water, so that the water flowing out of the gas water heater 9 and the water flowing into thethermostatic tank 4 are fully mixed, and the temperature of the water finally flowing out of the hotwater circulating assembly 1 is kept unchanged.

The foregoing is a preferred embodiment of the present invention, and the basic principles, principal features and advantages of the invention are shown and described. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are intended to illustrate the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, and the invention is intended to be protected by the following claims. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (8)

1. A constant-temperature hot water circulating device comprises a hot water circulating assembly (1) and a water pump (2) of the hot water circulating assembly, and is characterized in that one end of the water pump (2) is sequentially connected with a water path connecting pipe (3) and a constant-temperature tank (4), the other end of the water pump (2) is sequentially connected with a water inlet connector (5) and a temperature sensor (6), the constant-temperature tank (4) comprises an upper tank body (4.1) and a lower tank body (4.3), and one ends of the water pump (2) and the upper tank body (4.1) are mutually connected; wherein the upper tank body (4.1) and the lower tank body (4.3) are connected with each other, and a grid (4.2) is arranged between the upper tank body and the lower tank body;

the water-saving tank is characterized by further comprising a water inlet end (4.4) arranged at the top end of the upper tank body (4.1), the water inlet end (4.4) is connected with the water pump (2), a water outlet end (4.5) is arranged at the bottom end of the lower tank body (4.3), the grid (4.2) is provided with a solid part (4.9) corresponding to the water inlet end (4.4), and the solid part (4.9) and the water inlet end (4.4) are aligned with each other;

a plurality of water holes (4.6) which are mutually spaced are uniformly distributed on the outer side of the solid part (4.9) of the grid (4.2).

2. A thermostatic hot water circulation device according to claim 1, characterized in that the hot water circulation module (1) further comprises a controller (7) and a power cord plug (8).

3. A thermostatic hot water circulation device according to claim 2, characterized in that the controller (7) comprises a front housing (7.1), a control panel (7.2) and a rear housing (7.3) which are connected to each other in sequence.

4. A thermostatic hot water circulation device according to claim 3, characterized in that the controller (7) is provided with a control panel (7.4), the control panel (7.4) being provided on the front shell (7.1), the control panel (7.4) being provided with a plurality of control keys (7.5).

5. The constant-temperature hot water circulating device is characterized in that an annular convex rib (4.7) is arranged at the bottom end of the upper tank body (4.1), an annular groove (4.8) is arranged at the top end of the lower tank body (4.3) corresponding to the annular convex rib (4.7), and the annular convex rib (4.7) and the annular groove (4.8) are buckled with each other.

6. The constant-temperature hot water circulating device according to claim 1, characterized by further comprising a gas water heater (9), wherein a water inlet of the gas water heater (9) is connected with a tap water device (11), a first control valve (12) and a second control valve (13) are connected between the tap water device and the gas water heater, a water outlet of the gas water heater (9) is connected with a water inlet connector (5) of the hot water circulating assembly (1), a water outlet end (4.5) of the lower tank body (4.3) is sequentially connected with a third control valve (14) and more than one water consumption point, one end of the water consumption point is connected with a one-way valve (17), and the one-way valve (17) is connected with the first control valve (12) and/or the second control valve (13).

7. A control method of a constant-temperature hot water circulating device comprises the constant-temperature hot water circulating device as claimed in claim 6, wherein a wireless controller (10) is externally arranged on the hot water circulating component (1), and a user controls a water pump (2) of the hot water circulating component (1) through the wireless controller (10), and the control method comprises the following steps: a. the hot water circulation assembly (1) and the gas water heater (9) are respectively communicated with a power supply, and the hot water circulation assembly (1) firstly carries out standby detection; b. the user is provided with a reserved operating time (t) by means of the wireless control unit (10)_s) And set temperature (Ts), then wireless controller (10) send the start instruction to hot water circulation subassembly (1), c, after hot water circulation subassembly (1) received the instruction, water pump (2) of hot water circulation subassembly (1) start, hot water in gas heater (9) flows to water pump (2) through water inlet joint (5), d, temperature sensor (6) detect intake water temperature (T) of water pump (2), e, temperature sensor (6) transmit the information of intake water temperature (T) to wireless controller (10), if intake water temperature (T) is not less than or equal toSetting the temperature (Ts), calculating the stop time (T) of the water pump (2) after the inlet water temperature (T) reaches the set temperature (Ts) by the wireless controller (10), and if the stop time (T) is more than or equal to the reserved operation time (T)_s) The wireless controller (10) sends a stop instruction to the hot water circulation assembly (1), the hot water circulation assembly (1) receives the instruction, and the water pump (2) stops working.

8. The control method of the constant temperature hot water circulation device according to claim 7, further comprising a controller (7) provided in the hot water circulation module (1), wherein a user manually controls the water pump (2) of the hot water circulation module (1) through the controller (7), and the control method comprises: a. the hot water circulation assembly (1) and the gas water heater (9) are respectively communicated with a power supply, and the hot water circulation assembly (1) firstly carries out standby detection; b. the user is provided with a reserved operating time (t) by means of a control (7)_s) And a set temperature (Ts), then the water pump (2) is manually controlled to start through the controller (7), c, hot water in the gas water heater (9) flows to the water pump (2) through the water inlet connector (5), d, the water inlet temperature (T) of the water pump (2) is detected by the temperature sensor (6), if the water inlet temperature (T) is more than or equal to the set temperature (Ts), the controller (7) calculates the stop time (T) of the water pump (2) after the water inlet temperature (T) reaches the set temperature (Ts), and if the stop time (T) is more than or equal to the reserved operation time (T)_s) And the controller (7) controls the water pump (2) to stop working.

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