CN212566346U - Overtemperature-preventing gas-assisted solar water heating system - Google Patents

Abstract

The utility model discloses an anti-overtemperature gas-assisted solar water heating system, which comprises a solar heat collector, a water tank and a gas water heater, wherein the water tank forms a first circulating water path between a pipeline and the solar heat collector, the gas water heater forms a second circulating water path between the pipeline and the water tank, and a second control valve is arranged on the second circulating water path; the water temperature control device further comprises an overtemperature monitoring element and an overtemperature prevention controller, wherein the overtemperature monitoring element monitors the water temperature of the first circulating water path and outputs an overtemperature signal, and the overtemperature prevention controller controls the second control valve to be opened when receiving the overtemperature signal. When the temperature of water in solar collector and the water tank was too high, overtemperature monitoring component sent overtemperature signal, prevented overtemperature control ware received signal and opened the second control valve, and the high temperature water in the water tank gets into the second and circulates the water route, and wherein in the surplus heat gives off ambient air through gas heater to effectively prevent the inside overtemperature condition that appears of solar water heating system.

Description

Overtemperature-preventing gas-assisted solar water heating system

Technical Field

The utility model relates to a water heater field, in particular to prevent gas-assisted solar water heating system of overtemperature.

Background

A solar water heating system is a common domestic water heating system. A typical solar water heating system includes a solar collector, a water tank, and a pipe connecting the solar collector and the water tank to form a water circuit. Heating water through a solar heat collector at ordinary times, and storing hot water by using a water tank; meanwhile, water in the water tank can circularly flow through the solar heat collector to be heated repeatedly; when in use, hot water is directly led out from the water tank. The solar water heating system mainly utilizes the environment-friendly energy of solar energy and has the advantages of energy conservation, environmental protection and the like.

However, most of the land in China is located in the northern hemisphere, the solar radiation amount is large in summer, the water temperature of a solar water heating system is easily high, and the safety and the reliability of the solar water heating system can be influenced by the fact that the water temperature is too high. For example, the internal pressure of the solar water heating system is increased due to the excessively high water temperature, abnormal stress occurs locally, and deformation or breakage of structural components may occur; in addition, some non-metal structural components are sensitive to temperature, and the accelerated aging phenomenon can occur at higher temperature, so that the service life of the solar water heating system is obviously shortened; especially in solar collectors using antifreeze, too high an antifreeze temperature not only leads to an accelerated degradation of its performance, but also some chemical reactions occur, generating substances which have a destructive effect on the structural components of the solar collector.

At present, in order to reduce the problem caused by overhigh water temperature of a solar water heating system in summer, two common solutions are as follows: the first method is to install a cover on the heat collector to cover part of the heated surface, thereby reducing the heat collection amount and avoiding the high water temperature, but the method has the disadvantages of large field construction amount, removing the cover after the summer is over, and possibly causing insufficient heat collection amount when the sunshine condition changes, thereby influencing the use of the solar water heating system. The second method is automatic water drainage, when the temperature of water in the solar water heating system is detected to be higher, partial hot water is automatically drained and replaced by cold water, and the average temperature of hot water in the solar water heating system is reduced.

Therefore, in order to overcome the above disadvantages, the development of the gas-assisted solar water heating system for preventing the overtemperature is needed.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a prevent solar water heating system is assisted to overtemperature prote gas effectively prevents the inside overtemperature condition that appears of solar water heating system.

According to the utility model discloses a prevent solar water heating system is assisted to overtemperature gas of first aspect embodiment, include: a solar heat collector; the water tank forms a first circulating water path with the solar thermal collector through a pipeline; the gas stove forms a second circulating water path between the pipeline and the water tank, and a second control valve for controlling the switch of the second circulating water path is arranged on the second circulating water path; the first circulating water path is provided with the circulating water pump, and the second circulating water path is provided with the circulating water pump; the overtemperature monitoring element is arranged at any section of the first circulating water path, monitors the water temperature of the first circulating water path when the first circulating water path works, and sends an overtemperature signal when the water temperature of the first circulating water path exceeds a preset value; the overtemperature prevention controller is characterized in that the input end of the overtemperature prevention controller is connected with the overtemperature monitoring element and used for receiving the overtemperature signal, and the output end of the overtemperature prevention controller is connected with the second control valve and controls the second control valve to be opened when the overtemperature signal is received.

According to the utility model discloses prevent solar water heating system is assisted to overtemperature gas has following beneficial effect at least: when the solar irradiation amount greatly causes the water temperature in the solar heat collector and the water tank to be too high, the overtemperature monitoring element sends an overtemperature signal, the second circulating water path with the gas stove is opened after the overtemperature-preventing controller receives the signal, high-temperature water in the water tank enters the second circulating water path, and excess heat in the overtemperature-preventing controller is dissipated to ambient air through the heat exchanger arranged on the gas stove, so that the overtemperature condition in the solar water heating system is effectively prevented. Compared with the prior art, the overtemperature prevention gas-assisted solar water heating system of the embodiment does not need to be installed and detached to cover, and does not need to achieve the cooling effect by discharging hot water. The anti-overtemperature gas-assisted solar water heating system has the advantages of low manufacturing cost, convenience in installation, automatic operation in the whole process, high reliability, low running cost and the like.

According to the utility model discloses an aspect prevent solar water heating system is assisted to overtemperature gas, the gas furnace is gas heater, gas heater includes: the water supply pipeline is provided with a water heater water inlet and a water heater water outlet and is connected to the second circulating water channel through the water heater water inlet and the water heater water outlet; the first heat exchanger is arranged on the water supply pipeline; a burner; is arranged below the first heat exchanger; and the fan is arranged above the first heat exchanger. The gas water heater has the functions of heating and auxiliary cooling, and when the heating function of the gas water heater is used, the burner and the fan are turned on to heat water in the first heat exchanger; when the auxiliary cooling function of the gas water heater is used, only the fan is opened, high-temperature water of the solar water heating system is conveyed to the first heat exchanger through the second circulating water path, heat is emitted outwards with the help of the fan, and the effect of auxiliary cooling is achieved.

According to the utility model discloses the first aspect prevent solar water heating system is assisted to overtemperature gas, be provided with on the water tank and be used for inserting first circulation water route with the circulation water inlet and the circulation delivery port in second circulation water route.

According to the utility model discloses the first aspect prevent solar water heating system is assisted to overtemperature gas, set up moisturizing mouth and water tank delivery port on the water tank, the water tank delivery port passes through the three-way valve and connects on the second circulation water path. When the user uses hot water, the hot water in the water tank is output from the water outlet of the water tank.

According to the utility model discloses first aspect prevent solar water heating system is assisted to overtemperature gas, the three-way valve sets up gas heater before the water heater water inlet, the water of following water tank delivery port output can pass through gas heater, when the temperature is not enough, can utilize gas heater to export high-temperature water again after heating.

According to the utility model discloses the first aspect prevent solar water heating system is assisted to overtemperature gas, be provided with the hot water delivery port on the second circulation water route, the hot water delivery port sets up the water heater delivery port with between the circulation water inlet.

According to the utility model discloses the first aspect prevent super temperature gas auxiliary solar water heating system, be provided with the check valve on the second circulation water route, the check valve sets up hot water delivery port with between the circulation water inlet, the condition that prevents the refluence from appearing in water.

According to the utility model discloses first aspect prevent solar water heating system is assisted to overtemperature prote gas, the gas furnace is for gas heating water heater, gas heating water heater includes: the water supply pipeline is provided with a water heater water inlet and a water heater water outlet and is connected to the second circulating water channel through the water heater water inlet and the water heater water outlet; a first heat exchanger; a burner; is arranged below the first heat exchanger; and the fan is arranged above the first heat exchanger. A heating conduit passing through the first heat exchanger; and the heating pipeline and the water supply pipeline exchange heat in the second heat exchanger. The gas heating water heater has the functions of heating, heating hot water and assisting in cooling, and when the heating function of the gas heating water heater is used, a burner and a fan are turned on to heat a medium in a heating pipeline; when the gas heating water heater is used for heating hot water, the burner and the fan are turned on to heat the medium in the heating pipeline, and meanwhile, the medium in the heating pipeline exchanges heat with the water in the water supply pipeline through the second heat exchanger to heat the hot water; when the auxiliary cooling function of the gas heating water heater is used, only the fan is opened, high-temperature water of the solar water heating system is conveyed to the second heat exchanger through the second circulating water path, and the medium of the heating pipeline absorbs the heat of the hot water and gives off the heat outwards under the help of the first heat exchanger and the fan, so that the auxiliary cooling effect is achieved.

According to the utility model discloses first aspect prevent super temperature gas auxiliary solar water heating system, the input of second heat exchanger connect and the output of first heat exchanger, the output of second heat exchanger is connected the input of first heat exchanger constitutes the third circulation circuit, is in under the state of heating hot water or supplementary cooling when gas heating water heater, utilizes the third circulation circuit, makes the medium in the heating pipe circulate repeatedly between first heat exchanger and second heat exchanger, reaches the effect of heating hot water or supplementary cooling. Furthermore, a medium circulating pump is arranged on the third circulating loop, and a three-way control valve is further arranged on the third circulating loop.

According to the utility model discloses first aspect prevent solar water heating system is assisted to overtemperature gas, be provided with the first control valve of the first circulation water route switch of control on the first circulation water route. When the gas water heater is used for heating, the first circulating water way can be closed through the first control valve.

According to the utility model discloses the first aspect prevent solar water heating system is assisted to overtemperature gas, be provided with parallelly connected constant temperature heating valve and temperature difference circulating valve on first circulation water route and the second circulation water route. Only one of the constant temperature heating valve and the temperature difference circulating valve is in a working state in the same time period. When the hot water system carries out constant temperature heating, the constant temperature heating valve is opened; and when the hot water system performs temperature difference circulation heating, opening the temperature difference circulation valve.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural diagram of embodiment 1 of the present invention;

FIG. 2 is a schematic diagram of an embodiment of the solar thermal collector for a thermoelectric heating cycle in embodiment 1;

FIG. 3 is a schematic diagram of the embodiment 1 in which a solar heat collector is used for constant temperature heating;

FIG. 4 is a schematic diagram of the implementation of the high temperature protection cycle in embodiment 1;

FIG. 5 is a schematic diagram of the embodiment 1 using the cyclic heating of the gas water heater;

FIG. 6 is a schematic view showing the hot water yielding from example 1;

fig. 7 is a schematic structural diagram of embodiment 2 of the present invention.

The reference numbers illustrate: 100. a solar heat collector; 200. a water tank; 210. a water outlet of the water tank; 220. a water replenishing port; 300. a first circulation water path; 310. a first control valve; 400. a gas water heater; 410. a burner; 420. a first heat exchanger; 430. a fan; 440. a water inlet of the water heater; 450. a water outlet of the water heater; 500. a second circulation water path; 510. a second control valve; 520. a three-way valve; 521. a first interface; 522. a second interface; 523. a third interface; 530. a one-way valve; 600. a water circulating pump; 710. a temperature difference circulating valve; 720. a constant temperature heating valve; 800. a hot water outlet; 900. a gas heating water heater; 910. a burner; 920. a first heat exchanger; 930. a fan; 940. a water inlet of the water heater; 950. a water outlet of the water heater; 960. a heating pipe; 961. a heating inlet; 962. a heating outlet; 970. a second heat exchanger; 980. a medium circulation pump; 990. a three-way control valve.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means are one or more, and a plurality of means are two or more. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

Referring to fig. 1, the utility model provides an embodiment 1, an prevent solar water heating system is assisted to overtemperature prote gas, includingsolar collector 100 andwater tank 200, constitute firstcirculation water route 300 through the pipeline betweensolar collector 100 and thewater tank 200, be provided with watertank delivery port 210 andmoisturizing mouth 220 on thewater tank 200, be provided with circulatingwater pump 600 on the firstcirculation water route 300. Referring to fig. 2 and 3, in a normal use of the solar water heating system, water is heated by thesolar collector 100 and stored in thewater tank 200; the water in thewater tank 200 may be repeatedly heated by thesolar collector 100 through the firstcirculation water path 300. Further, in this embodiment, agas water heater 400 is further provided, thegas water heater 400 forms a secondcirculation water path 500 through a space between the pipe and thewater tank 200, thecirculation water pump 600 is simultaneously located on the secondcirculation water path 500, and asecond control valve 510 is provided on the secondcirculation water path 500, and thesecond control valve 510 is used for controlling the on-off state of the secondcirculation water path 500. In this embodiment, one of the functions of thegas water heater 400 is to assist in cooling when the temperature of the water in the solar water heating system is high. In order to realize this function, the solar water heating system of the present embodiment is further provided with an overtemperature monitoring element and an overtemperature prevention controller. Specifically, the over-temperature monitoring element is a temperature sensor, and the over-temperature monitoring element may be disposed at any section of the firstcirculation water path 300, and is preferably disposed in the solarthermal collector 100 or thewater tank 200; the overtemperature monitoring element monitors the water temperature of the first circulatingwater channel 300 when the first circulatingwater channel 300 works, and sends an overtemperature signal when the water temperature of the first circulatingwater channel 300 exceeds a preset value; the input end of the over-temperature prevention controller is connected with the over-temperature monitoring element and used for receiving an over-temperature signal, and the output end of the over-temperature prevention controller is connected with thesecond control valve 510. Referring to fig. 4, when the firstcirculation water path 300 is operated, the overtemperature prevention controller receives an overtemperature signal, thesecond control valve 510 is controlled to be opened, and high-temperature hot water passes through the secondcirculation water path 500 and is emitted to the external environment through thegas water heater 400 to achieve the effect of reducing the water temperature, so that the overtemperature condition inside the solar water heating system is effectively prevented.

Specifically, thegas water heater 400 includes a water supply pipe, aburner 410, a first heat exchanger 420, and afan 430. The water supply pipeline is provided with a waterheater water inlet 440 and a waterheater water outlet 450, and the water supply pipeline is connected to the second circulating water channel through the waterheater water inlet 440 and the waterheater water outlet 450. The first heat exchanger 420 is disposed on the water supply pipeline, theburner 410 is disposed below the first heat exchanger 420, and theblower fan 430 is disposed above the first heat exchanger 420. Thegas water heater 400 has heating and auxiliary cooling functions. Referring to fig. 5, when the heating function of thegas water heater 400 is used, theburner 410 and theblower fan 430 are turned on to heat water in the first heat exchanger 420. Referring to fig. 4, when the auxiliary cooling function of thegas water heater 400 is used, only thefan 430 is turned on, and the high-temperature water of the solar water heating system is delivered to the first heat exchanger 420 through the secondcirculation water path 500, so that heat is radiated outwards with the help of thefan 430, and the auxiliary cooling effect is achieved.

Specifically, thewater tank 200 is provided with a circulation water inlet, a circulation water outlet, awater replenishing port 220 and a watertank water outlet 210. The circulation water inlet and the circulation water outlet are used for connecting the firstcirculation water path 300 and the secondcirculation water path 500. Thewater replenishing port 220 is connected to a tap water pipe. Thetank outlet 210 is connected to the secondcirculation water path 500 by a three-way valve 520. Thefirst interface 521 of the three-way valve 520 is connected to the output end of thesecond control valve 510, thesecond interface 522 of the three-way valve 520 is connected to the waterheater water inlet 440, and thethird interface 523 of the three-way valve 520 is connected to the watertank water outlet 210.

It is easy to think that the three-way valve 520 is arranged in front of thewater heater inlet 440 of thegas water heater 400, and the water output from thewater tank outlet 210 passes through thegas water heater 400, as shown in fig. 6, when the water temperature is insufficient, thegas water heater 400 can be used for heating and then outputting high-temperature water.

In addition, ahot water outlet 800 is provided on the secondcirculation water path 500, and thehot water outlet 800 is provided between thewater heater outlet 450 and the circulation water inlet. Further, acheck valve 530 is arranged on the secondcirculation water path 500, and thecheck valve 530 is arranged between thehot water outlet 800 and the circulation water inlet to prevent water from flowing backwards.

The firstcirculation water path 300 is further provided with afirst control valve 310 for controlling the opening and closing of the firstcirculation water path 300. As shown in fig. 5, when thegas water heater 400 is used for heating, the firstcirculation water path 300 may be closed by thefirst control valve 310.

Further, a constanttemperature heating valve 720 and a temperaturedifference circulating valve 710 are arranged in parallel on the first circulatingwater path 300 and the second circulatingwater path 500. Only one of the constanttemperature heating valve 720 and the temperaturedifference circulating valve 710 is in operation during the same period of time. Referring to fig. 3, when the hot water system performs constant temperature heating, the constanttemperature heating valve 720 is opened; referring to fig. 2, when the hot water system performs the temperature difference circulation heating, the temperaturedifference circulation valve 710 is opened.

Referring to fig. 7, the present invention further provides an embodiment 2, in this embodiment 2, a gasheating water heater 900 is used to replace thegas water heater 400. The gas heating water heater comprises a water supply pipeline, aburner 910, afirst heat exchanger 920, afan 930, aheating pipeline 960, asecond heat exchanger 970, amedium circulating pump 980 and a three-way control valve 990. The water supply pipeline is provided with a waterheater water inlet 940 and a waterheater water outlet 950, and the water supply pipeline is connected to the second circulatingwater channel 500 through the waterheater water inlet 940 and the waterheater water outlet 950. Theheating pipe 960 is provided with aheating inlet 961 and aheating outlet 962, theheating pipe 960 passes through thefirst heat exchanger 920, theburner 910 is disposed below thefirst heat exchanger 920, and theblower 930 is disposed above thefirst heat exchanger 920. The input end ofsecond heat exchanger 970 is connected and the output offirst heat exchanger 920, and the input offirst heat exchanger 920 is connected to the output ofsecond heat exchanger 970, constitutes the third circulation circuit, andmedium circulation pump 980 and three-way control valve 990 set up on the third circulation circuit, andheating pipeline 960 and water supply pipeline carry out the heat exchange insecond heat exchanger 970. The gas-firedheating water heater 900 of this embodiment has functions of heating, heating hot water, and assisting in cooling. When the heating function of the gas-fired heating water heater is used, the secondcirculation water path 500 is closed, theburner 910 and thefan 930 are turned on, and the medium in theheating pipe 960 is heated. When the gas-firedheating water heater 900 is used to heat hot water, theburner 910 and thefan 930 are turned on, the medium in theheating pipe 960 is repeatedly heated by the third circulation loop, and the secondcirculation water path 500 is turned on, so that the medium in theheating pipe 960 exchanges heat with water in thesecond heat exchanger 970 and the water supply pipe to heat hot water. When the auxiliary cooling function of the gasheating water heater 900 is used, the secondcirculation water path 500 is opened, the high-temperature water of the solar water heating system is conveyed to thesecond heat exchanger 970 through the secondcirculation water path 500, the medium of theheating pipe 960 absorbs the heat of the hot water, and simultaneously thefan 930 is opened, and the medium of theheating pipe 960 is radiated outwards with the help of thefan 930 after flowing to thefirst heat exchanger 920, so that the auxiliary cooling effect is achieved.

The overtemperature prevention gas-assisted solar water heating system according to an embodiment of the present invention is described in detail with specific embodiments with reference to fig. 1 to 7. It is to be understood that the following description is illustrative only and is not intended as a specific limitation on the invention.

Example 1:

fig. 1 is a schematic structural diagram of embodiment 1 provided by the present invention, which includes a solarthermal collector 100, awater tank 200, a circulatingwater pump 600, afirst control valve 310, asecond control valve 510, agas water heater 400, a constanttemperature heating valve 720, a temperaturedifference circulating valve 710 and a control device. Wherein, thewater tank 200 is provided with awater replenishing port 220 and a watertank water outlet 210, and thesolar heat collector 100 and thewater tank 200 are internally provided with temperature sensors which comprise overtemperature monitoring elements. The control device comprises an overtemperature prevention controller. Thegas water heater 400 includes a water supply pipe, aburner 410, a first heat exchanger 420, and afan 430.

Specifically, a firstcirculation water path 300 is formed between thesolar collector 100 and thewater tank 200 through a pipeline, and afirst control valve 310 is located on the firstcirculation water path 300; a secondcirculation water path 500 is formed between thegas water heater 400 and thewater tank 200 through a pipe, and asecond control valve 510 is positioned on the secondcirculation water path 500. In the present embodiment, thecirculation water pump 600 is located on both the first and secondcirculation water paths 300 and 500. The constanttemperature heating valve 720 and the temperaturedifference circulation valve 710 are disposed in parallel and then disposed on the firstcirculation water path 300.

Further, thewater tank 200 is provided with a circulation water inlet, a circulation water outlet, awater replenishing port 220 and a watertank water outlet 210. The circulation water inlet and the circulation water outlet are used for connecting the firstcirculation water path 300 and the secondcirculation water path 500. Thewater replenishing port 220 is connected to a tap water pipe. Thetank outlet 210 is connected to the secondcirculation water path 500 by a three-way valve 520. The three-way valve 520 is disposed in front of thewater heater inlet 440 of thegas water heater 400. Thefirst interface 521 of the three-way valve 520 is connected to the output end of thesecond control valve 510, thesecond interface 522 of the three-way valve 520 is connected to the waterheater water inlet 440, and thethird interface 523 of the three-way valve 520 is connected to the watertank water outlet 210.

In addition, ahot water outlet 800 is provided on the secondcirculation water path 500, and thehot water outlet 800 is provided between thewater heater outlet 450 and the circulation water inlet. Further, acheck valve 530 is disposed on the secondcirculation water path 500, and thecheck valve 530 is disposed between thehot water outlet 800 and the circulation water inlet.

The water supply pipeline of thegas water heater 400 is provided with awater heater inlet 440 and awater heater outlet 450, and the water supply pipeline is connected to the secondcirculation water channel 500 through thewater heater inlet 440 and thewater heater outlet 450. The water supply pipeline passes through the first heat exchanger 420. Theburner 410 is disposed below the first heat exchanger 420, and theblower 430 is disposed above the first heat exchanger 420. When thegas water heater 400 is used to heat hot water, theburner 410 and thefan 430 are simultaneously activated. When thegas water heater 400 is used for auxiliary cooling, only theblower fan 430 is activated.

The operation mode of the embodiment is as follows:

fig. 2 is a schematic diagram of the solar water heating system of embodiment 1 performing a temperature difference heating cycle, which is generally used in winter or when the solar energy is less, in order to improve the solar heating efficiency. The system starts the circulatingwater pump 600 according to the temperature difference between the temperature sensor and thewater tank 200 and opens the first circulatingvalve 310 and the temperaturedifference circulating valve 710, so that the water circulates along the first circulatingwater path 300 and is repeatedly heated by thesolar heat collector 100 until the set temperature is reached.

Fig. 3 is a schematic diagram illustrating constant temperature heating of the solar water heating system according to embodiment 1, which is generally used to increase the temperature of hot water in thewater tank 200 when solar energy is sufficient. When the system detects that the temperature of the outlet of thesolar heat collector 100 is higher than a certain value (the solar energy is sufficient), the circulatingwater pump 600 is started, the first circulatingvalve 310 and the constanttemperature heating valve 720 are opened, and water circulates along the first circulatingwater path 300 and is repeatedly heated by thesolar heat collector 100 until the set temperature is reached.

Fig. 4 is a schematic diagram of a high temperature protection cycle of the solar water heating system of embodiment 1. After the system is started, when the temperature of the heating water in the solarthermal collector 100 is too high due to some reason, the overtemperature monitoring element sends an overtemperature signal, the overtemperature prevention controller receives the signal, thesecond control valve 510 is opened, thefirst connector 521 and thesecond connector 522 of the three-way valve 520 are conducted, the first circulatingwater path 300 and the second circulatingwater path 500 work at the same time, and the system enters a high-temperature protection mode. High-temperature water flowing out of thewater tank 200 is conveyed to thegas water heater 400 through the second circulatingwater path 500, and passes through the first heat exchanger 420, theburner 410 of thegas water heater 400 is in a closed state, and meanwhile, thefan 430 is started to accelerate heat dissipation of the first heat exchanger 420, so that surplus heat is dissipated to the external environment through the first heat exchanger 420, an auxiliary cooling effect is achieved, and the over-temperature condition inside the solar water heating system is effectively prevented.

Fig. 5 is a schematic view of a gas heating cycle of the solar water heating system of embodiment 1. After the system is started, when the control device detects that the heat provided by thesolar heat collector 100 is insufficient, the system is switched to a gas heating mode, thesecond control valve 510 and the constanttemperature circulating valve 720 are opened, thefirst control valve 310 is closed, the first circulatingwater path 300 is closed, and the second circulatingwater path 500 is conducted. Theburner 410 and theblower fan 430 in thegas water heater 400 are started, and water is circulated in the secondcirculation water path 500 by thecirculation water pump 600 and heated by thegas water heater 400 until the hot water temperature of thewater tank 200 reaches a desired temperature. Fig. 5 is a schematic diagram of constant temperature cycle heating, in which when temperature difference heating is performed, the temperaturedifference heating valve 710 is opened, and the constanttemperature cycle valve 720 is closed.

Fig. 6 is a schematic view illustrating the use of hot water supplied from the solar water heating system of embodiment 1. When the user opens thehot water outlet 800, thethird interface 523 and thesecond interface 522 of the three-way valve 520 are connected, and the hot water in thewater tank 200 flows out along thewater tank outlet 210, passes through the three-way valve 520 and thegas water heater 400, and reaches thehot water outlet 800 to be supplied to the outside. When the water temperature is insufficient, thegas water heater 400 can be used for further heating the hot water and then outputting the high-temperature water.

Example 2:

fig. 7 is a schematic structural diagram of an embodiment 2 provided by the present invention, and in comparison with embodiment 1, a gasheating water heater 900 is adopted to replace thegas water heater 400. The gas heating water heater comprises a water supply pipeline, aburner 910, afirst heat exchanger 920, afan 930, aheating pipeline 960, asecond heat exchanger 970, amedium circulating pump 980 and a three-way control valve 990. The water supply pipeline is provided with a waterheater water inlet 940 and a waterheater water outlet 950, and the water supply pipeline is connected to the second circulatingwater channel 500 through the waterheater water inlet 940 and the waterheater water outlet 950. Theheating pipe 960 is provided with aheating inlet 961 and aheating outlet 962, theheating pipe 960 passes through thefirst heat exchanger 920, theburner 910 is disposed below thefirst heat exchanger 920, and theblower 930 is disposed above thefirst heat exchanger 920. The input end ofsecond heat exchanger 970 is connected and the output offirst heat exchanger 920, and the input offirst heat exchanger 920 is connected to the output ofsecond heat exchanger 970, constitutes the third circulation circuit, andmedium circulation pump 980 and three-way control valve 990 set up on the third circulation circuit, andheating pipeline 960 and water supply pipeline carry out the heat exchange insecond heat exchanger 970. The gas-firedheating water heater 900 of this embodiment has functions of heating, heating hot water, and assisting in cooling. When the heating function of the gas-fired heating water heater is used, the secondcirculation water path 500 is closed, theburner 910 and thefan 930 are turned on, and the medium in theheating pipe 960 is heated. When the gas-firedheating water heater 900 is used to heat hot water, theburner 910 and thefan 930 are turned on, the medium in theheating pipe 960 is repeatedly heated by the third circulation loop, and the secondcirculation water path 500 is turned on, so that the medium in theheating pipe 960 exchanges heat with water in thesecond heat exchanger 970 and the water supply pipe to heat hot water. When the auxiliary cooling function of the gasheating water heater 900 is used, the secondcirculation water path 500 is opened, the high-temperature water of the solar water heating system is conveyed to thesecond heat exchanger 970 through the secondcirculation water path 500, the medium of theheating pipe 960 absorbs the heat of the hot water, and simultaneously thefan 930 is opened, and the medium of theheating pipe 960 is radiated outwards with the help of thefan 930 after flowing to thefirst heat exchanger 920, so that the auxiliary cooling effect is achieved.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. The utility model provides an prevent solar water heating system is assisted to super temperature gas which characterized in that includes:

a solar heat collector;

the water tank forms a first circulating water path with the solar thermal collector through a pipeline;

the gas stove forms a second circulating water path between the pipeline and the water tank, and a second control valve for controlling the switch of the second circulating water path is arranged on the second circulating water path;

the first circulating water path is provided with the circulating water pump, and the second circulating water path is provided with the circulating water pump;

the overtemperature monitoring element is arranged at any section of the first circulating water path, monitors the water temperature of the first circulating water path when the first circulating water path works, and sends an overtemperature signal when the water temperature of the first circulating water path exceeds a preset value;

the overtemperature prevention controller is characterized in that the input end of the overtemperature prevention controller is connected with the overtemperature monitoring element and used for receiving the overtemperature signal, and the output end of the overtemperature prevention controller is connected with the second control valve and controls the second control valve to be opened when the overtemperature signal is received.

2. The anti-overtemperature gas-assisted solar water heating system of claim 1, wherein the gas stove is a gas water heater, and the gas water heater comprises:

the water supply pipeline is provided with a water heater water inlet and a water heater water outlet and is connected to the second circulating water channel through the water heater water inlet and the water heater water outlet;

the first heat exchanger is arranged on the water supply pipeline;

a burner; is arranged below the first heat exchanger;

and the fan is arranged above the first heat exchanger.

3. The overtemperature prevention gas-assisted solar water heating system as claimed in claim 2, wherein a circulating water inlet and a circulating water outlet for connecting the first circulating water path and the second circulating water path are arranged on the water tank.

4. The overtemperature prevention gas-assisted solar water heating system as claimed in claim 3, wherein the water tank is provided with a water replenishing port and a water tank water outlet, and the water tank water outlet is connected to the second circulating water path through a three-way valve.

5. The anti-overtemperature gas-assisted solar water heating system of claim 4, wherein the three-way valve is arranged in front of the water heater water inlet of the gas water heater.

6. The anti-overtemperature gas-assisted solar water heating system according to any one of claims 3 to 5, wherein a hot water outlet is arranged on the second circulating water path and is arranged between the water outlet of the water heater and the circulating water inlet.

7. The anti-overtemperature gas-assisted solar water heating system as claimed in claim 6, wherein a one-way valve is arranged on the second circulating water path, and the one-way valve is arranged between the hot water outlet and the circulating water inlet.

8. The anti-overtemperature gas-assisted solar water heating system according to claim 1, wherein the gas stove is a gas heating water heater, and the gas heating water heater comprises:

the water supply pipeline is provided with a water heater water inlet and a water heater water outlet and is connected to the second circulating water channel through the water heater water inlet and the water heater water outlet;

a first heat exchanger;

a burner; is arranged below the first heat exchanger;

the fan is arranged above the first heat exchanger;

a heating conduit passing through the first heat exchanger;

and the heating pipeline and the water supply pipeline exchange heat in the second heat exchanger.

9. The anti-overtemperature gas-assisted solar water heating system as claimed in claim 1 or 8, wherein a first control valve for controlling the opening and closing of the first circulating water path is arranged on the first circulating water path.

10. The anti-overtemperature gas-assisted solar water heating system as claimed in claim 9, wherein the first circulating water path and the second circulating water path are provided with a constant temperature heating valve and a temperature difference circulating valve which are connected in parallel.

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