Air source heat pump and municipal steam combined heat supply closed type hot water system
Through the closed hot water system that combines air source heat pumps with municipal steam for heating, the problems of reduced heating capacity of air source heat pumps and high cost of gas boilers in hot summer and cold winter areas are solved, achieving stable heating and economical operation.
Patent Information
- Application Number
- CN202422924256.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-29
- Publication Date
- 2025-10-10
- Estimated Expiration
- 2034-11-29
AI Technical Summary
In areas with hot summers and cold winters, the heating capacity of air source heat pumps decreases during defrosting in winter, making it difficult to provide stable heating. In addition, the operating costs of gas boilers are high. There are problems with the combined heating of municipal steam as a primary heating auxiliary heat source for the hot water system and the air source heat pump.
A closed hot water system with combined heating of air source heat pump and municipal steam is designed. Three operating modes are realized by valve switching: heating with municipal steam alone, heating with air source heat pump alone, and heating with municipal steam and air source heat pump in series. The economical operating mode is selected based on the heating capacity of the air source heat pump and the price of municipal steam.
It achieves stable heating under different weather conditions, reduces operating energy consumption and costs, reduces carbon emissions, and solves the problems of heating stability and economy.
Smart Images
Figure CN223425335U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to heating facilities technical field relates to closed hot water system. BACKGROUND
[0002] At present, in the Yangtze River Basin, especially in hot summer and cold winter area, the life hot water system of existing building and part new building generally adopts gas boiler as heat source, or air source heat pump and electric auxiliary heat combined operation as heat source to provide life hot water for building. Closed hot water system adopts pressure tank, hot water does not contact with air when operating, and water terminal does not need to configure additional pressure pump, and energy consumption is low, and hot water pressure comes from the cold water pipe network in the subarea, and cold and hot water pressure is balanced, and the terminal of water point can guarantee constant temperature water outlet. The hot water system using gas boiler as heat source, gas combustion can produce a large amount of carbon dioxide, and in recent years, gas price rises, and in addition, gas boiler is used as traditional energy form, and the efficiency is relatively low, so that the operating cost is relatively high. The hot water system using air source heat pump has higher heating efficiency, but in winter, due to hot summer and cold winter area, air humidity is relatively larger than other climate zones, and when heating water in winter, frequent defrosting occurs, so that the heat supply capacity is seriously attenuated, and it is difficult to meet the demand of stable heat supply. Compared with the increasingly rising gas, the price of part municipal steam is relatively cheap, however, as a primary heating auxiliary heat source of hot water system, how to combine heat supply with air source heat pump is a problem existing at present. CONTENT OF THE UTILITY MODEL
[0003] In order to solve the problem of how to combine heat supply with air source heat pump when municipal steam is used as a primary heating auxiliary heat source of hot water system in the background art, the utility model provides a closed hot water system combining heat supply of air source heat pump and municipal steam.
[0004] The closed hot water system of the utility model, including the hot water supply system of user water point, municipal steam heating system and air source heat pump heating system are connected on the hot water supply system, municipal steam of municipal steam heating system is connected with life hot water supply pipeline through plate heat exchanger and valve, air source heat pump heating system is connected with pressure storage tank through valve, and is connected with life hot water supply pipeline through pressure storage tank, municipal steam heating system can provide heat source for hot water supply system through the opening and closing operation of valve via life hot water supply pipeline, air source heat pump heating system can provide heat source for hot water supply system through the opening and closing operation of valve via life hot water supply pipeline, municipal steam heating system and air source heat pump heating system can provide heat source for hot water supply system through the opening and closing operation of valve in series via life hot water supply pipeline. In the closed hot water system, pressure storage tank can reduce the running time of air-cooled heat pump, and the purpose of stable water supply is achieved.
[0005] Furthermore, the municipal steam heating system includes a municipal steam pipe, a plate heat exchanger, a steam trap, a condensate pipe, a third electric valve, a fourth electric valve and a fifth electric valve; the municipal steam pipe is connected to the plate heat exchanger, and the water outlet of the plate heat exchanger connects the hot water to the domestic hot water supply pipe through the fourth electric valve. The fifth electric valve is arranged on the domestic hot water supply pipe, and the return water of the domestic hot water supply pipe is connected to the return water outlet of the plate heat exchanger through the fifth electric valve and the third electric valve in sequence; a condensate pipe is provided on the plate heat exchanger, and a steam trap is provided on the condensate pipe.
[0006] Furthermore, the air source heat pump heating system includes an air heat exchange channel, an air source heat pump evaporator, an air source heat pump compressor, an air source heat pump condenser, an air source heat pump throttle valve, a fourth refrigerant pipe, a first refrigerant pipe, a second refrigerant pipe, a third refrigerant pipe, an air source heat pump system water supply pipe, a first electric valve, an air source heat pump system return pipe, an air source side hot water circulation water pump and a second electric valve; the air heat exchange channel is connected to the air source heat pump evaporator, the outlet of the air source heat pump evaporator is connected to the air source heat pump compressor through the first refrigerant pipe, and the air source heat pump compressor The machine is connected to the air source heat pump condenser through the second refrigerant pipe, the air source heat pump condenser is connected to the air source heat pump throttle valve through the third refrigerant pipe, and the air source heat pump throttle valve is connected to the air source heat pump evaporator through the fourth refrigerant pipe; the air source heat pump condenser is connected to the pressure water storage tank through the air source heat pump system water supply pipe, and the air source heat pump system water supply pipe is provided with a first electric valve; the air source heat pump system return pipe is connected to the return water port of the pressure water storage tank and the air source heat pump condenser, and the air source heat pump system return pipe is provided with an air source side hot water circulation pump and a second electric valve.
[0007] Furthermore, the hot water supply system includes a domestic hot water supply pipe, hot water users, a cold water supply pipe, a domestic hot water return pipe, a water supply pipe, and a hot water return pump; the domestic hot water supply pipe is connected to the hot water users, the cold water supply pipe connects the tap water supply to the hot water users, the domestic hot water return pipe connects the return water of the hot water users and the pressure water storage tank, and the domestic hot water return pipe is provided with a hot water return pump; the water supply pipe connects the tap water supply to the domestic hot water return pipe.
[0008] Furthermore, the water supply pipeline is sequentially provided with a one-way check valve, a water meter, a pressure gauge, a thermometer, and an expansion tube.
[0009] Furthermore, the water supply pipe is provided with a second shut-off valve, and a silver ion sterilizer is connected to the upstream and downstream ends of the second shut-off valve via a pipe. The upstream inlet pipe of the silver ion sterilizer is provided with a first shut-off valve, and the downstream outlet pipe of the silver ion sterilizer is provided with a third shut-off valve. The silver ion sterilizer generates silver ions by electrolyzing pure silver electrodes. The silver ions react with microorganisms, deactivating them and achieving the effect of microbial inactivation, thereby disinfecting domestic hot water.
[0010] Compared with the existing technology, the present invention connects a municipal steam heating system and an air source heat pump heating system to the hot water supply system. By adjusting the valve switch, three operating modes can be achieved: the municipal steam heating system uses municipal steam to provide high-temperature hot water using a plate heat exchanger, which provides a heat source for the hot water supply system alone; the air source heat pump heating system uses an air source heat pump through electrical drive to provide domestic hot water, which provides a heat source for the hot water supply system alone; the air source heat pump system and the municipal steam heat exchange system operate in series, and the cold water of the hot water system is heated once by the air source heat pump and then heated again by municipal steam, so that the municipal steam serves as the primary heating auxiliary heat source of the hot water system and is combined with the air source heat pump to provide stable domestic hot water for water points. This closed hot water system can select an economical operating mode based on outdoor weather conditions, the heating capacity of the air source heat pump, the price of electricity, and the price of municipal steam, thereby reducing operating energy consumption and costs for users, reducing carbon emissions, and solving the stability and economy problems of heating in existing domestic hot water systems. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 This is a schematic structural diagram of a closed hot water system of the present utility model.
[0012] Explanation of reference signs: 1-air source heat pump evaporator; 2-air source heat pump compressor; 3-air source heat pump condenser; 4-air source heat pump throttling valve; 5-air source side hot water circulating water pump; 6-pressure storage water tank; 7-plate heat exchanger; 8-drain trap; 9-hot water user; 9a-first water point; 9b-second water point; 10-hot water return water pump; 11-silver ion sterilizer; 12-water meter; 13-expansion pipe; 14-pressure gauge; 15-thermometer; 16-one-way check valve; 17-first stop valve; 18-second stop valve; 19-third stop valve; 20-first electric valve; 21-second electric valve; 23-third electric valve; 24-fourth electric valve; 25-fifth electric valve; 25-air heat exchange channel; 26-first refrigerant pipeline; 27-second refrigerant pipeline; 28-third refrigerant pipeline; 29-fourth refrigerant pipeline; 30-air source heat pump system water supply pipe; 31-air source heat pump system return water pipe; 32-municipal steam pipeline; 33-condensate water pipeline; 34-domestic hot water supply pipeline; 35-domestic hot water return pipeline; 36-water replenishment pipeline; 37-cold water supply pipeline; 38-first water point hot water valve; 39-first water point cold water valve; 40-second water point hot water valve; 41-second water point cold water valve. DETAILED DESCRIPTION
[0013] In order to make the technical problems, technical solutions and beneficial effects of the present application clearer, the present application will be further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and do not limit the present application. The positional relationships described in the examples are consistent with those shown in the drawings.
[0014] The closed hot water system of air source heat pump combined with municipal steam heating, as shown in Figure 1 , is composed of hot water supply system of user water point, municipal steam heating system and air source heat pump heating system, the hot water supply system is connected with the municipal steam heating system and the air source heat pump heating system, the municipal steam heating system and the air source heat pump heating system can provide heat source for the hot water supply system alone, or the municipal steam heating system and the air source heat pump heating system can be connected in series to provide heat source for the hot water supply system.
[0015] Specifically, as shown in Figure 1As shown, the municipal steam of the municipal steam heating system is connected to the domestic hot water supply pipe 34 through the plate heat exchanger 7 and the valve; the air source heat pump heating system is connected to the pressure water storage tank 6 through the valve, and is connected to the domestic hot water supply pipe 34 through the pressure water storage tank 6; the municipal steam heating system can provide a heat source for the hot water supply system separately through the domestic hot water supply pipe 34 by opening and closing the valve; the air source heat pump heating system can provide a heat source for the hot water supply system separately through the domestic hot water supply pipe 34 by opening and closing the valve; the municipal steam heating system and the air source heat pump heating system can be connected in series through the opening and closing operation of the valve to provide a heat source for the hot water supply system via the domestic hot water supply pipe 34.
[0016] Specifically, if Figure 1 As shown, the municipal steam heating system consists of a municipal steam pipeline 32, a plate heat exchanger 7, a steam trap 8, a condensate pipeline 33, a third electric valve 22, a fourth electric valve 23, and a fifth electric valve 24. The municipal steam pipeline 32 is connected to the plate heat exchanger 7. The water outlet of the plate heat exchanger 7 connects the hot water to the domestic hot water supply pipeline 34 through the fourth electric valve 23. The fifth electric valve 24 is installed on the domestic hot water supply pipeline 34. The return water from the domestic hot water supply pipeline 34 is connected to the return water outlet of the plate heat exchanger 7 through the fifth electric valve 24 and the third electric valve 22 in sequence. The plate heat exchanger 7 is provided with a condensate pipeline 33, and the steam trap 8 is installed on the condensate pipeline 33.
[0017] Specifically, if Figure 1 As shown, the air source heat pump heating system consists of an air heat exchange channel 25, an air source heat pump evaporator 1, an air source heat pump compressor 2, an air source heat pump condenser 3, an air source heat pump throttle valve 4, a fourth refrigerant pipe 29, a first refrigerant pipe 26, a second refrigerant pipe 27, a third refrigerant pipe 28, an air source heat pump system water supply pipe 30, a first electric valve 20, an air source heat pump system return pipe 31, an air source side hot water circulation pump 5 and a second electric valve 21. The air heat exchange channel 25 is connected to the air source heat pump evaporator 1, the outlet of the air source heat pump evaporator 1 is connected to the air source heat pump compressor 2 through the first refrigerant pipe 26, the air source heat pump compressor 2 is connected to the air source heat pump condenser 3 through the second refrigerant pipe 27, the air source heat pump condenser 3 is connected to the air source heat pump throttle valve 4 through the third refrigerant pipe 28, and the air source heat pump throttle valve 4 is connected to the air source heat pump evaporator 1 through the fourth refrigerant pipe 29; the air source heat pump condenser 3 is connected to the pressure water storage tank 6 through the air source heat pump system water supply pipe 30, and the air source heat pump system water supply pipe 30 is provided with a first electric valve 20; the air source heat pump system return pipe 31 is connected to the return water port of the pressure water storage tank 6 and the air source heat pump condenser 3, and the air source heat pump system return pipe 31 is provided with an air source side hot water circulation water pump 5 and a second electric valve 21.
[0018] Specifically, if Figure 1 As shown, the hot water supply system includes a domestic hot water supply pipe 34, hot water users 9, a cold water supply pipe 37, a domestic hot water return pipe 35, a water supply pipe 36, and a hot water return pump 10. The domestic hot water supply pipe 34 connects to the hot water users 9, the cold water supply pipe 37 connects the tap water supply to the hot water users 9, the domestic hot water return pipe 35 connects the return water from the hot water users 9 and the pressure storage tank 6, and the domestic hot water return pipe 35 is provided with a hot water return pump 10. The water supply pipe 36 connects the tap water supply to the domestic hot water return pipe 35. The water supply pipe 36 is provided with a one-way check valve 16, a water meter 12, a pressure gauge 14, a thermometer 15, and an expansion tube 13 in this order. A second shut-off valve 18 is also provided on the water supply pipe 36. A silver ion sterilizer 11 is connected to the upstream and downstream ends of the second shut-off valve 18 via a pipe. A first shut-off valve 17 is provided on the water inlet pipe at the upstream end of the silver ion sterilizer 11, and a third shut-off valve 19 is provided on the water outlet pipe at the downstream end of the silver ion sterilizer 11. The hot water users 9 can be divided into a first water point 9a and a second water point 9b. The hot water input pipe of the first water point 9a is provided with a first water point hot water valve 38, and the cold water input pipe of the first water point 9a is provided with a first water point cold water valve 39. The hot water input pipe of the second water point 9b is provided with a second water point hot water valve 40, and the cold water input pipe of the first water point 9a is provided with a second water point cold water valve 41. Of course, the number of hot water users 9 is not limited to two and can be one or more.
[0019] Example 1
[0020] The municipal steam heating system heats domestic hot water separately. Open the third electric valve 22, fourth electric valve 23, first shut-off valve 17, and third shut-off valve 19, and close the first electric valve 20, second electric valve 21, fifth electric valve 24, and second shut-off valve 1. The building's internal tap water supply pipeline is divided into two routes: a make-up water pipeline 36 and a cold water supply pipeline 37. The cold water supply pipeline 37 directly delivers cold water to the first and second taps 9a, 9b. The cold water in the make-up water pipeline 36 passes through a one-way check valve 16, a water meter 12, a pressure gauge 14, a thermometer 15, and an expansion tube 13. It then mixes with the pressurized domestic hot water return water from the hot water return pump 10, enters the silver ion disinfector 11, and then enters the pressure storage tank 6. The outlet of the pressure storage tank 6 is connected to the domestic hot water supply pipeline 34. Domestic hot water enters the plate heat exchanger 7 through the third electric valve 22. The heated, high-temperature hot water then passes through the fourth electric valve 23 and enters the first and second taps 9a, 9b. The municipal steam passes through the municipal steam pipeline and the plate heat exchanger 7 to become condensed water, which is then discharged into the drainage ditch after passing through the steam trap 8.
[0021] The second stop valve 18 is a bypass valve. When the silver ion sterilizer 11 needs to be replaced and cleaned, the second stop valve 18 is opened, and the first stop valve 17 and the third stop valve 19 are closed.
[0022] Embodiment 2
[0023] The air source heat pump heating system alone heats domestic hot water. The first electric valve 20, the second electric valve 21, the fifth electric valve 24, the first stop valve 17, and the third stop valve 19 are opened, and the third electric valve 22, the fourth electric valve 23, and the second stop valve 18 are closed. The air source heat pump heating system uses the condenser 3 to heat domestic hot water. The outlet of the condenser 3 is connected to the first electric valve 20. The heated domestic hot water enters the pressure storage water tank 6 through the air source heat pump system water supply pipe 30. The pressure storage water tank 6 is additionally provided with three interfaces, one of which is connected to the air source heat pump system water return pipe 31. The outlet is connected to the inlet of the condenser 3 through the air source side hot water circulating pump 5 to complete the air source heat pump heating cycle system. The other two interfaces of the pressure storage water tank 6 are connected to the domestic hot water supply pipe 34 and the domestic hot water return pipe 35, respectively. High-temperature domestic hot water enters the first water use point 9a and the second water use point 9b through the supply pipe 34 and the fifth electric valve 24. The remaining domestic hot water is mixed with cold water from the water supplement pipe 36 to form low-temperature hot water, which is disinfected by the silver ion sterilizer 11 and then returned to the pressure storage water tank 6.
[0024] Embodiment 3
[0025] The municipal steam heating system and the air source heat pump heating system are connected in series to provide heat source for the hot water supply system. The first electric valve 20, the second electric valve 21, the third electric valve 22, the fourth electric valve 23, the first stop valve 17, and the third stop valve 19 are opened, and the fifth electric valve 24 and the second stop valve 18 are closed. In the low-temperature season, the air source heat pump heating system uses the condenser 3 to provide 50°C low-temperature hot water. The outlet of the condenser 3 enters the pressure storage water tank 6 through the air source heat pump system water supply pipe 30. One of the outlets of the pressure storage water tank 6 enters the plate heat exchanger 7 for secondary heating through the domestic hot water supply pipe 34. The 60°C high-temperature hot water after steam heating enters the first water use point 9a and the second water use point 9b. The remaining domestic hot water is mixed with water supplement and then enters the pressure storage water tank 6. When the water temperature in the pressure storage water tank 6 is lower than 45°C, the air source side hot water circulating pump 5 is started. The hot water from the other outlet of the pressure storage water tank 6 enters the condenser 3 through the air source heat pump system water return pipe 31 for heating, completing the first cycle.
[0026] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings and specific embodiments. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the scope of protection of the present invention.
Claims
1. A closed hot water system using an air source heat pump and municipal steam for combined heating, including a hot water supply system at a user's water point, characterized by: The hot water supply system is connected to a municipal steam heating system and an air source heat pump heating system; The municipal steam of the municipal steam heating system is connected to the domestic hot water supply pipeline (34) through a plate heat exchanger (7) and a valve; the air source heat pump heating system is connected to the pressure water storage tank (6) through a valve, and is connected to the domestic hot water supply pipeline (34) through the pressure water storage tank (6); The municipal steam heating system can independently provide a heat source for the hot water supply system via the domestic hot water supply pipe (34) by opening and closing the valve; The air source heat pump heating system can independently provide a heat source for the hot water supply system via the domestic hot water supply pipe (34) by opening and closing the valve; The municipal steam heating system and the air source heat pump heating system can be connected in series through the opening and closing operation of valves to provide a heat source for the hot water supply system via the domestic hot water supply pipe (34).
2. A closed hot water system combining air source heat pump and municipal steam for heating according to claim 1, characterized in that: The municipal steam heating system comprises a municipal steam pipeline (32), a plate heat exchanger (7), a steam trap (8), a condensate pipeline (33), a third electric valve (22), a fourth electric valve (23) and a fifth electric valve (24); The municipal steam pipe (32) is connected to the plate heat exchanger (7); the water outlet of the plate heat exchanger (7) connects hot water to the domestic hot water supply pipe (34) through the fourth electric valve (23); the fifth electric valve (24) is arranged on the domestic hot water supply pipe (34); the return water of the domestic hot water supply pipe (34) is connected to the return water outlet of the plate heat exchanger (7) through the fifth electric valve (24) and the third electric valve (22) in sequence; the plate heat exchanger (7) is provided with a condensate pipe (33), and the condensate pipe (33) is provided with a steam trap (8).
3. A closed hot water system combining air source heat pump and municipal steam for heating according to claim 2, characterized in that: The air source heat pump heating system comprises an air heat exchange channel (25), an air source heat pump evaporator (1), an air source heat pump compressor (2), an air source heat pump condenser (3), an air source heat pump throttle valve (4), a fourth refrigerant pipeline (29), a first refrigerant pipeline (26), a second refrigerant pipeline (27), a third refrigerant pipeline (28), an air source heat pump system water supply pipe (30), a first electric valve (20), an air source heat pump system return pipe (31), an air source side hot water circulation pump (5) and a second electric valve (21); The air heat exchange channel (25) is connected to the air source heat pump evaporator (1), the outlet of the air source heat pump evaporator (1) is connected to the air source heat pump compressor (2) through the first refrigerant pipe (26), the air source heat pump compressor (2) is connected to the air source heat pump condenser (3) through the second refrigerant pipe (27), the air source heat pump condenser (3) is connected to the air source heat pump throttle valve (4) through the third refrigerant pipe (28), and the air source heat pump throttle valve (4) is connected to the air source heat pump throttle valve (4) through the fourth refrigerant pipe (29). 9) is connected to the air source heat pump evaporator (1); the air source heat pump condenser (3) is connected to the pressure water storage tank (6) through the air source heat pump system water supply pipe (30), and the air source heat pump system water supply pipe (30) is provided with a first electric valve (20); the air source heat pump system return pipe (31) is connected to the return water port of the pressure water storage tank (6) and the air source heat pump condenser (3), and the air source heat pump system return pipe (31) is provided with an air source side hot water circulation pump (5) and a second electric valve (21).
4. A closed hot water system combining air source heat pump and municipal steam for heating according to claim 3, characterized in that: The hot water supply system comprises a domestic hot water supply pipe (34), a hot water user (9), a cold water supply pipe (37), a domestic hot water return pipe (35), a water supply pipe (36), and a hot water return pump (10); the domestic hot water supply pipe (34) is connected to the hot water user (9); the cold water supply pipe (37) connects the tap water supply to the hot water user (9); the domestic hot water return pipe (35) connects the return water of the hot water user (9) and the pressure water storage tank (6); the domestic hot water return pipe (35) is provided with a hot water return pump (10); the water supply pipe (36) connects the tap water supply to the domestic hot water return pipe (35).
5. A closed hot water system combining air source heat pump and municipal steam for heating according to claim 4, characterized in that: The water supply pipeline (36) is provided with a one-way check valve (16), a water meter (12), a pressure gauge (14), a thermometer (15), and an expansion pipe (13) in sequence.
6. A closed hot water system combining air source heat pump and municipal steam for heating according to claim 5, characterized in that: A second stop valve (18) is also provided on the water supply pipe (36), and a silver ion sterilizer (11) is connected between the upstream end and the downstream end of the second stop valve (18) via a pipe. The water inlet pipe at the upstream end of the silver ion sterilizer (11) is provided with a first stop valve (17), and the water outlet pipe at the downstream end of the silver ion sterilizer (11) is provided with a third stop valve (19).