Heating cold-water-free hot water supply system with water tank
By introducing a hot water storage tank and a pump into the zero-cold water wall-mounted furnace system, the problem of frequent start-up of the hot water furnace and poor bathing experience is solved, and the effect of energy saving and stable operation is achieved.
Patent Information
- Application Number
- CN202421684172.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-17
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-07-17
AI Technical Summary
When the existing zero-cold water wall-mounted furnace starts the zero-cold water function, the hot water furnace is frequently started, resulting in low thermal efficiency. The water pipe between the water storage tank and the bath is cold water, which affects the bathing experience.
A heating zero-cold water heating system with water tank is designed. By setting up a hot water storage tank outside the hot water furnace and placing a heating water pump and a zero-cold water pump in the hot water furnace during the zero-cold water cycle, it is to avoid frequent start of the hot water furnace and improve the operating stability of the pump.
It effectively avoids frequent start of hot water furnaces, saves energy, and improves the user's bathroom experience, while improving the operating stability of the pump.
Smart Images
Figure CN222911756U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of gas heating and hot water boilers, and particularly relates to a heating zero - cold - water hot water supply system with a water tank. Background Technique
[0002] A gas heating and hot water boiler, also known as a "gas wall - mounted heating boiler" or "wall - hung boiler", is a fast - heating device without a hot water storage device, just like a gas instantaneous water heater. However, they have essential differences in structure. Different from a water heater, a gas heating and hot water boiler has dual functions of heating and supplying hot water, which can not only meet the heating needs of multiple rooms but also take into account the hot water bathing needs.
[0003] At present, the zero - cold - water wall - hung boiler is a relatively popular structure in the market. By configuring a zero - cold - water pump + wall - hung boiler, when the zero - cold - water function is started, the zero - cold - water pump is started for circulating heating to achieve the zero - cold - water effect. Generally, ordinary zero - cold - water models do not configure a water storage tank. Due to the too - fast temperature drop in the pipeline, the hot water boiler has to be directly started every time the zero - cold - water function is started, resulting in frequent startup of the hot water boiler and low thermal efficiency. Some models configure a water storage tank. By heating the water in the water storage tank, when taking a bath, hot water can be output in time when the user needs it. However, since the water pipe between the water storage tank and the bathing area is cold water, the cold water needs to be drained completely before hot water can flow out, resulting in a poor bathing experience. In addition, in the above zero - cold - water models, generally, the zero - cold - water pump is placed outside the hot water boiler. In cold weather, the zero - cold - water pump is easily affected by the air, thus affecting its working efficiency. Content of the Utility Model
[0004] In order to overcome the deficiencies of the prior art, the utility model provides a heating zero - cold - water hot water supply system with a water tank to solve the above - mentioned traditional problems. During the zero - cold - water circulation process, it can effectively avoid the frequent startup of the traditional hot water boiler, achieve the effect of saving energy, and bring a better bathroom experience to users.
[0005] The utility model is realized by adopting the following first technical solution:
[0006] A heating zero - cold - water hot water supply system with a water tank is used to be connected to a heating terminal and a bathroom terminal. The heating zero - cold - water hot water supply system includes a gas heating and hot water boiler, a hot water storage tank connected to the gas heating and hot water boiler, a bathroom water supply pipeline, a bathroom circulating water pipeline, a heating water outlet pipeline, a heating water return pipeline, a water tank heating pipeline, and a water tank return pipeline. The gas heating and hot water boiler includes a furnace body, a main heat exchanger installed in the furnace body, a heating water pump, a zero - cold - water pump, and an outlet three - way valve;
[0007] The heating water pump, the main heat exchanger, the heating end outlet of the outlet three - way valve, the heating water outlet pipeline, the heating terminal, and the heating water return pipeline are connected to form a heating cycle;
[0008] The zero - cold - water pump, the hot - water storage tank, the bathroom water - supply pipeline, and the bathroom circulating - water pipeline are connected to form a bathroom zero - cold - water circulation; one end of the bathroom terminal is connected to the pipeline between the bathroom water - supply pipeline and the bathroom circulating - water pipeline;
[0009] A heat - exchange coil is provided in the hot - water storage tank, and the heating water pump, the main heat exchanger, the bathroom - end outlet of the outlet three - way valve, the water tank heating pipeline, the heat - exchange coil, and the water tank return pipeline are connected to form a water - tank heating circulation.
[0010] Preferably, the position of the hot - water outlet of the hot - water storage tank is higher than the position of the zero - cold - water return port of the hot - water storage tank, and the heat - exchange coil is disposed between the hot - water outlet and the zero - cold - water return port.
[0011] Preferably, a first interface valve, a second interface valve, a third interface valve, a fourth interface valve, and a fifth interface valve are provided on the gas - fired heating and hot - water boiler. The first interface valve is disposed at the heating - end outlet of the outlet three - way valve, the second interface valve is disposed at the bathroom - end outlet of the outlet three - way valve, the third interface valve is disposed at the outlet of the zero - cold - water pump, the fourth interface valve is disposed at the inlet of the zero - cold - water pump, and the fifth interface valve is disposed at the inlet of the heating water pump.
[0012] Preferably, a sixth interface valve, a seventh interface valve, an eighth interface valve, and a ninth interface valve are provided on the hot - water storage tank. The sixth interface valve is connected to the water tank heating pipeline, the seventh interface valve is connected to the water tank return pipeline, the eighth interface valve is connected to the bathroom circulating - water pipeline, and the ninth interface valve is connected to the bathroom water - supply pipeline.
[0013] Preferably, a bathroom return NTC and a first water - flow sensor are further provided at the inlet of the zero - cold - water pump; a heating return NTC is provided at the inlet of the heating water pump.
[0014] Preferably, a first Y - type filter is provided on the bathroom circulating - water pipeline near the zero - cold - water pump, and a second Y - type filter is provided on the heating return pipeline near the heating water pump.
[0015] Preferably, the heating and zero - cold - water hot - water supply system further includes a water supply pipe and a connection conversion pipeline, and the water supply pipe is connected to the bathroom circulating - water pipeline through the connection conversion pipeline.
[0016] Preferably, a liquid - level detector and a temperature detector are further provided on the hot - water storage tank. The liquid - level detector is used to detect the liquid level of the hot - water storage tank, and the temperature detector is used to detect the temperature of the hot - water storage tank.
[0017] The present utility model is implemented by adopting the following second technical solution:
[0018] A heating zero - cold - water hot - water supply system with a water tank, which is used to be connected to a heating terminal, a bathroom terminal, and a high - level bathroom terminal. It is characterized in that the heating zero - cold - water hot - water supply system includes a gas - fired heating hot - water boiler, a hot - water storage tank connected to the gas - fired heating hot - water boiler, a bathroom water supply pipeline, a bathroom circulating water pipeline, a heating water outlet pipeline, a heating water return pipeline, a water tank heating pipeline, a water tank return pipeline, a high - level bathroom water pipe, and a high - level return pipe. The gas - fired heating hot - water boiler includes a boiler body, a main heat exchanger installed in the boiler body, a heating water pump, a zero - cold - water pump, and a water outlet three - way valve; a heat exchange coil is provided in the hot - water storage tank.
[0019] One end of the high - level bathroom water pipe is connected to the outlet of the zero - cold - water pump, and the other end of the high - level bathroom water pipe is used to be connected to the high - level bathroom terminal. One end of the high - level return pipe is connected to the hot - water storage tank; a first regulating valve is provided on the high - level bathroom water pipe, and a second regulating valve is provided on the high - level return pipe; when the high - level bathroom terminal does not need hot water, the first regulating valve, the second regulating valve, and the zero - cold - water pump are opened to form a high - level zero - cold - water circulation.
[0020] Preferably, a second water flow sensor is further provided on the high - level bathroom water pipe behind the first regulating valve.
[0021] Compared with the prior art, the beneficial effects of the present utility model are as follows:
[0022] 1. The heating zero - cold - water hot - water supply system of the present utility model is provided with a hot - water storage tank outside the hot - water boiler. During the zero - cold - water circulation process, it can effectively avoid the frequent startup of the traditional hot - water boiler, achieve the effect of saving energy, and bring a better bathroom experience to users. At the same time, pumps such as the heating water pump and the zero - cold - water pump are placed inside the hot - water boiler to improve the stability of their operation.
[0023] 2. The heating zero - cold - water hot - water supply system of the present utility model comprehensively solves the problem of supplying bathroom water at different positions, including high - level zero - cold - water circulation and low - level zero - cold - water circulation, to ensure that hot water can be supplied in time when the user needs to use hot water. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Figure 1 It is a schematic internal structure diagram of the gas - fired heating hot - water boiler of the present utility model;
[0025] Figure 2 It is a first - type schematic structure diagram of the heating zero - cold - water hot - water supply system of the present utility model;
[0026] Figure 3 It is a second - type schematic structure diagram of the heating zero - cold - water hot - water supply system of the present utility model.
[0027] In the figure: 10, gas heating and hot water boiler; 11, boiler body; 12, burner; 13, main heat exchanger; 14, fan; 15, gas valve; 16, heating water pump; 17, zero cold water pump; 170, bathroom return water NTC; 171, first water flow sensor; 18, outlet three-way valve; 20, hot water storage tank; 21, heat exchange coil; 30, bathroom water supply pipe; 40, bathroom circulating water pipe; 50, heating water outlet pipe; 60, heating water return pipe; 70, water tank heating pipe; 80, water tank return pipe; 90, high-position bathroom water pipe; 91, high-position return pipe. Detailed implementation mode
[0028] To make the above objects, features, and advantages of the present utility model more obvious and understandable, the following will describe the detailed implementation mode of the present utility model with reference to the accompanying drawings. Many specific details are set forth in the following description to fully understand the present utility model. However, the present utility model can be implemented in many other ways different from those described herein. Those skilled in the art can make similar improvements without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.
[0029] In the description of the present utility model, it should be understood that the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.
[0030] In the description of the present utility model, it should be understood that when an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be intermediate elements at the same time. On the contrary, when an element is referred to as being "directly" connected to another element, there are no intermediate elements.
[0031] Please refer to Figure 1 - Figure 2 , which is a heating zero cold water hot water supply system with a water tank in a preferred embodiment of the present utility model, used to be connected to a heating terminal and a bathroom terminal to provide the functions of heating and zero cold water hot water supply for users. Specifically, the heating zero cold water hot water supply system includes a gas heating and hot water boiler 10, a hot water storage tank 20 connected to the gas heating and hot water boiler 10, a bathroom water supply pipe 30, a bathroom circulating water pipe 40, a heating water outlet pipe 50, a heating water return pipe 60, a water tank heating pipe 70, and a water tank return pipe 80.
[0032] The gas-fired heating and hot water boiler 10 serves as the heat source for the entire system. In this embodiment, the gas-fired heating and hot water boiler 10 includes a furnace body 11, a burner 12 installed inside the furnace body 11, a main heat exchanger 13, a blower 14, a gas valve 15, a heating water pump 16, a zero cold water pump 17, and a water outlet three-way valve 18. The burner 12 is connected to the blower 14 and the gas valve 15. Through the action of the blower 14, gas and air are drawn into the burner 12 for ignition and combustion.
[0033] The heating water pump 16, the main heat exchanger 13, the heating end outlet of the water outlet three-way valve 18, the heating water outlet pipe 50, the heating terminal, and the heating return pipe 60 are connected to form a heating cycle; the zero cold water pump 17, the hot water storage tank 20, the bathroom water supply pipe 30, and the bathroom circulating water pipe 40 are connected to form a bathroom zero cold water circulation (the zero cold water pump 17 is installed on the bathroom circulating water pipe 40). One end of the bathroom terminal is connected to the pipe between the bathroom water supply pipe 30 and the bathroom circulating water pipe 40; a heat exchange coil 21 is provided in the hot water storage tank 20. The heating water pump 16, the main heat exchanger 13, the bathroom end outlet of the water outlet three-way valve 18, the water tank heating pipe 70, the heat exchange coil 21, and the water tank return pipe 80 are connected to form a water tank heating cycle.
[0034] In the above structure, pumps such as the zero cold water pump 17 and the heating water pump 16 are all placed inside the furnace body 11 of the gas-fired heating and hot water boiler 10. On the one hand, during operation, the temperature of each pump can be maintained, enabling it to start quickly during operation, avoiding the pumps being placed outside the furnace body 11 and being affected by cold weather, which may affect their normal operation. Among them, the zero cold water pump 17 and the water outlet three-way valve 18 are an integrated unit, or the zero cold water pump 17 is installed on the water outlet three-way valve 18 to improve the compactness of equipment installation.
[0035] In some embodiments, the gas-fired heating and hot water boiler 10 is provided with a first interface valve, a second interface valve, a third interface valve, a fourth interface valve, and a fifth interface valve. The first interface valve is provided at the heating end outlet of the water outlet three-way valve 18 for connecting to the heating water outlet pipe 50. The second interface valve is provided at the bathroom end outlet of the water outlet three-way valve 18 for connecting to the water tank heating pipe 70. The third interface valve is provided at the outlet of the zero cold water pump 17 for connecting to the water tank return pipe 80 of the hot water storage tank 20 section. The fourth interface valve is provided at the inlet of the zero cold water pump 17 for connecting to the water tank return pipe 80 between the hot water storage tank 20 and the zero cold water pump 17. The fifth interface valve is provided at the inlet of the heating water pump 16 for connecting to the heating return pipe 60.
[0036] The heat storage water tank 20 is provided with a sixth interface valve, a seventh interface valve, an eighth interface valve and a ninth interface valve. The sixth interface valve is connected to the water tank heating pipeline 70, the seventh interface valve is connected to the water tank return pipeline 80, the eighth interface valve is connected to the bathroom circulating water pipeline 40, and the ninth interface valve is connected to the bathroom water supply pipeline 30. By setting each valve, the installation convenience of the equipment is improved.
[0037] As Figure 2 shown, a bathroom return water NTC 170 and a first water flow sensor 171 are also provided at the inlet of the zero cold water pump 17. The bathroom return water NTC 170 and the first water flow sensor 171 are both installed in the gas heating and hot water furnace 10 or installed in other places according to needs. The bathroom return water NTC 170 is used to detect the water temperature of the bathroom zero cold water circulation. When the bathroom return water NTC 170 detects that the temperature of the bathroom circulating water pipeline 40 is lower than 35°C, the zero cold water pump 17 is started to run the bathroom zero cold water circulation, so that the water in the pipeline always maintains a relatively high temperature. When the detected temperature is higher than 45°C, the zero cold water pump 17 is stopped.
[0038] A first Y-type filter is provided at the position where the bathroom circulating water pipeline 40 is close to the zero cold water pump 17, and a second Y-type filter is provided at the position where the heating return water pipeline 60 is close to the heating water pump 16. Each filter is used to filter impurities in the pipeline to avoid impurities affecting the operation of the pump.
[0039] The heating zero cold water hot water supply system is also provided with a water supply pipe and a connection conversion pipeline. The water supply pipe is connected to the bathroom circulating water pipeline 40 through the connection conversion pipeline. The heat storage water tank 20 is also provided with a liquid level detector and a temperature detector (not shown in the figure). The liquid level detector is used to detect the liquid level of the heat storage water tank 20, and the temperature detector is used to detect the temperature of the heat storage water tank 20. At the beginning, when the liquid level of the heat storage water tank 20 does not reach the set liquid level, tap water will flow into the heat storage water tank 20 through the connection conversion pipeline to make up water to the set liquid level. At this time, the zero cold water pump 17 is not started or started according to demand. During subsequent normal operation, when the detected temperature is lower than the required detected water temperature, the zero cold water pump 17 can be started for hot water circulation. Subsequently, when the detected temperature is higher than 45°C, the zero cold water pump 17 is stopped. When the user needs to use hot water, the hot water flows out from the bathroom water supply pipeline 30 to the user. Then, tap water will flow into the heat storage water tank 20 through the connection conversion pipeline to make up water for the heat storage water tank 20 to achieve the effect of automatic water replenishment. If the user finds that the zero cold water function is not started during bathing, the zero cold water function can be temporarily started directly by manually turning on the faucet in the bathroom. After the water flow is detected for 3s to 5s and then closed, the integrated gas heating and hot water furnace starts the zero cold water water pump. When the detected return water NTC temperature is higher than 45°C, the zero cold water water pump stops running.
[0040] In this embodiment, as Figure 2As shown in the figure, when the hot water storage tank 20 is installed at a relatively high position, such as higher than the water-using points of the heating end and the bathroom end, the water in the hot water storage tank 20 can flow naturally to each bathroom water-using position. Among them, the hot water outlet of the hot water storage tank 20 is located at the upper end of the hot water storage tank 20, and the zero cold water return port of the hot water storage tank 20 is located at the lower end of the hot water storage tank 20, that is, the position of the hot water outlet of the hot water storage tank 20 is higher than the position of the zero cold water return port of the hot water storage tank 20. The heat exchange coil 21 is placed between the hot water outlet of the hot water storage tank 20 and the zero cold water return port of the hot water storage tank 20. The hot water outlet of the hot water storage tank 20 is connected to the bathroom water supply pipe 30, and the zero cold water return port of the hot water storage tank 20 is connected to the bathroom circulating water pipe 40, so that the heated hot water can flow out through the hot water outlet.
[0041] When the above system is in normal use, when the heating return water NTC detects that the heating temperature does not meet the requirements, the ignition combustion occurs, and the outlet three-way valve 18 is switched to the heating end outlet to form a heating cycle, and the main burner 12 heats for the heating cycle; when the heating temperature meets the requirements but the water temperature of the hot water storage tank 20 does not meet the requirements, the outlet three-way valve 18 is switched to the bathroom end outlet, and the water tank heating cycle is started, and the main burner 12 heats for the water tank heating cycle to raise the temperature of the hot water storage tank 20 for heat storage; when the bathroom return water NTC 170 detects that the temperature of the bathroom circulating water pipe 40 is lower than the zero cold water set low temperature, the zero cold water pump 17 is started, and the bathroom zero cold water circulation is run to keep the water in the pipe at a relatively high temperature all the time. When it is detected that the temperature is higher than the zero cold water set high temperature, the zero cold water pump 17 is stopped.
[0042] In another embodiment, when the installation position of the hot water storage tank 20 cannot cover all bathroom water-using points, such as there is still a high-end bathroom end, such as Figure 3 As shown in the figure, the present invention also provides a heating zero cold water hot water supply system with a water tank, which is used to be connected to the heating end, the bathroom end and the high-end bathroom end. Specifically, the heating zero cold water hot water supply system includes a gas heating hot water furnace 10, a hot water storage tank 20 connected to the gas heating hot water furnace 10, a bathroom water supply pipe 30, a bathroom circulating water pipe 40, a heating water outlet pipe 50, a heating water return pipe 60, a water tank heating pipe 70, a water tank return pipe 80, a high-end bathroom water pipe 90 and a high-end return pipe 91.
[0043] The gas heating hot water furnace 10 includes a furnace body 11, a burner 12 installed in the furnace body 11, a main heat exchanger 13, a blower 14, a gas valve 15, a heating water pump 16, a zero cold water pump 17 and an outlet three-way valve 18. The hot water storage tank 20 is provided with a heat exchange coil 21.
[0044] One end of the high-position bathroom water pipe 90 is connected to the outlet of the zero cold water pump 17, one end of the high-position return water pipe 91 is connected to the hot water storage tank 20, one end of the high-position end of the bathroom is connected to the pipeline between the high-position bathroom water pipe 90 and the high-position return water pipe 91. A first regulating valve and a second water flow sensor located at the rear end of the first regulating valve are provided on the high-position bathroom water pipe 90, and a second regulating valve is provided on the high-position return water pipe 91. When the high-position end of the bathroom does not need hot water, the first regulating valve, the second regulating valve and the zero cold water pump 17 are turned on to form a high-position zero cold water circulation. When the second water flow sensor detects a water flow demand, the first regulating valve is opened, the second regulating valve is closed, and the zero cold water pump 17 is turned on to form a high-position hot water supply system (at this time, the tap water does not supply water to the hot water storage tank 20). Through the action of the zero cold water pump 17, the hot water is transported to the high-position end of the bathroom. When the high-position end of the bathroom and the end of the bathroom (low-position water use point) need hot water at the same time, a small amount of valves are opened to make part of the water flow back, and then it is transported to the high-position end of the bathroom through the zero cold water pump 17 to ensure that there is hot water supply at each water use point. If the water consumption at the end of the bathroom is large, the zero cold water pump 17 can be stopped to temporarily stop supplying hot water to the high-position end of the bathroom.
[0045] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.
[0046] The above-described embodiments only represent several implementation manners of the present utility model, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several deformations and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the utility model patent shall be subject to the appended claims.
Claims
1. A heating zero cold water hot water supply system with a water tank, used to connect with the heating terminal and the bathroom terminal, characterized in that: The heating zero-cold water hot water supply system includes a gas heating hot water boiler, a hot water storage tank connected to the gas heating hot water boiler, a bathroom water supply pipe, a bathroom circulating water pipe, a heating water outlet pipe, a heating water return pipe, a water tank heating pipe and a water tank return pipe. The gas heating hot water boiler includes a furnace body, a main heat exchanger installed in the furnace body, a heating water pump, a zero-cold water pump and a water outlet three-way valve; The heating water pump, the main heat exchanger, the heating end outlet of the water outlet three-way valve, the heating water outlet pipe, the heating end, and the heating water return pipe are connected to form a heating cycle; The zero-cold water pump, the hot water storage tank, the bathroom water supply pipeline, and the bathroom circulating water pipeline are connected to form a bathroom zero-cold water circulation; one end of the bathroom terminal is connected to the pipeline between the bathroom water supply pipeline and the bathroom circulating water pipeline; A heat exchange coil is arranged in the heat storage tank, and the heating water pump, the main heat exchanger, the bathroom outlet of the water outlet three-way valve, the water tank heating pipe, the heat exchange coil, and the water tank return pipe are connected to form a water tank heating cycle.
2. The heating zero cold water hot water supply system with a water tank according to claim 1, characterized in that: The hot water outlet of the hot water storage tank is located higher than the zero cold water return port of the hot water storage tank, and the heat exchange coil is placed between the hot water outlet and the zero cold water return port.
3. The heating zero cold water hot water supply system with a water tank according to claim 1, characterized in that: The gas heating hot water boiler is provided with a first interface valve, a second interface valve, a third interface valve, a fourth interface valve and a fifth interface valve. The first interface valve is arranged at the outlet of the heating end of the water outlet three-way valve, the second interface valve is arranged at the outlet of the bathroom end of the water outlet three-way valve, the third interface valve is arranged at the outlet of the zero cooling water pump, the fourth interface valve is arranged at the inlet of the zero cooling water pump, and the fifth interface valve is arranged at the inlet of the heating water pump.
4. The heating zero cold water hot water supply system with a water tank according to claim 1, characterized in that: The heat storage tank is provided with a sixth interface valve, a seventh interface valve, an eighth interface valve and a ninth interface valve, the sixth interface valve is connected to the water tank heating pipe, the seventh interface valve is connected to the water tank return pipe, the eighth interface valve is connected to the bathroom circulating water pipe, and the ninth interface valve is connected to the bathroom water supply pipe.
5. The heating zero cold water hot water supply system with a water tank according to claim 1, characterized in that: A bathroom return water NTC and a first water flow sensor are also provided at the inlet of the zero cooling water pump; a heating return water NTC is provided at the inlet of the heating water pump.
6. The heating zero cold water hot water supply system with a water tank according to claim 5, characterized in that: The bathroom circulating water pipeline is provided with a first Y-type filter near the zero-cooling water pump, and the heating return water pipeline is provided with a second Y-type filter near the heating water pump.
7. The heating zero cold water hot water supply system with a water tank according to claim 1, characterized in that: The heating zero cold water hot water supply system is also provided with a tap water pipe and a connecting conversion pipe, and the tap water pipe is connected to the bathroom circulating water pipe through the connecting conversion pipe.
8. The heating zero cold water hot water supply system with a water tank according to claim 1, characterized in that: The hot water storage tank is also provided with a liquid level detector and a temperature detector. The liquid level detector is used to detect the liquid level of the hot water storage tank, and the temperature detector is used to detect the temperature of the hot water storage tank.
9. A heating zero cold water hot water supply system with a water tank, used to connect with a heating terminal, a bathroom terminal and a bathroom high terminal, characterized in that: The heating zero-cold water hot water supply system includes a gas heating hot water boiler, a hot water storage tank connected to the gas heating hot water boiler, a bathroom water supply pipe, a bathroom circulating water pipe, a heating water outlet pipe, a heating return water pipe, a water tank heating pipe, a water tank return water pipe, a high-position bathroom water pipe and a high-position return water pipe. The gas heating hot water boiler includes a furnace body, a main heat exchanger installed in the furnace body, a heating water pump, a zero-cold water pump and a water outlet three-way valve; a heat exchange coil is arranged in the hot water storage tank; One end of the high-level bathroom water pipe is connected to the outlet of the zero-cold water pump, the other end of the high-level bathroom water pipe is used to be connected to the high-level end of the bathroom, and one end of the high-level return pipe is connected to the hot water storage tank; a first regulating valve is provided on the high-level bathroom water pipe, and a second regulating valve is provided on the high-level return pipe; when the high-level end of the bathroom does not need hot water, the first regulating valve, the second regulating valve and the zero-cold water pump are opened to form a high-level zero-cold water circulation.
10. The heating zero cold water hot water supply system with a water tank according to claim 9, characterized in that: The high-position bathroom water pipe is also provided with a second water flow sensor located at the rear end of the first regulating valve.