Double-source coupling type heat pump system

Abstract

The utility model discloses a double-source coupling type heat pump system which comprises an air source heat pump unit, a water source heat pump unit, an energy storage water tank, a water storage tank, a cooling tower and a heat consumer, and a first circulation pipeline, a second circulation pipeline, a third circulation pipeline and a fourth circulation pipeline are respectively formed through opening and closing control of a plurality of electromagnetic valves to achieve different operation modes. Switching of a single-source system and a double-source system and multiple heating (cooling) modes can be achieved. During coupling operation, the double-source heat pump unit and the water tank form a first circulation pipeline. During decoupling operation, the low-temperature air source heat pump unit is directly communicated with the heat user to form a second circulating pipeline; the low-temperature air source heat pump unit, the energy storage water tank and the heat user form a third circulating pipeline to realize heating (cooling); the water source heat pump unit, the energy storage water tank, the cooling tower and the heat user form a fourth circulation pipeline to refrigerate the heat user.

Description

Technical Field

[0001] The utility model relates to a heat pump system, in particular to a dual-source coupled heat pump system. Background Art

[0002] Heat pumps consume part of the high-potential energy (mechanical energy, electrical energy or thermal energy, etc.) as compensation, and convert the low-potential energy stored in the environmental medium (water, air, soil) that cannot be directly used into high-potential energy that can be used through thermal circulation, and transfer the energy to the user needs in the building through the system circulation system. There is no polluting external discharge during the heat exchange process, which can effectively improve the environmental quality. Compared with traditional boiler and chiller systems, heat pump systems have significant advantages. In recent years, China has been vigorously promoting the development and application of heat pump technology.

[0003] Due to the low ambient temperature in the north in winter, the energy efficiency ratio of the air source heat pump system is greatly reduced. As for the unit itself, the evaporator is prone to frost under low temperature conditions, which may cause the heat pump to shut down in serious cases. Therefore, the operation effect of air source heat pump alone in the north is not ideal.

[0004] When using a water source heat pump unit, it is necessary to consider that the water source meets certain temperature, water volume, and water quality requirements. Hydrological conditions are an important prerequisite for determining whether the water source heat pump unit system can operate normally and stably. Therefore, the use scenarios of water source heat pumps are greatly limited.

[0005] In the past, coupled heat pump systems were fixed-mode series or parallel combinations. The system performance was improved to a certain extent in low-temperature environments, but the system mode could not be flexibly changed to match the actual environment according to actual load requirements, resulting in energy waste in non-extreme environments. Utility Model Content

[0006] The utility model aims to solve the problems that a single heat source heat pump system has poor operating stability, harsh operating conditions, and poor environmental adaptability; the existing coupled heat pump system has poor operating flexibility and it is difficult to coordinate the system's heating (cooling) capacity and load. A dual-source coupled heat pump system is proposed, which can be flexibly coupled and decoupled according to the operating environment, has the ability to provide a stable supply of heating (cooling) water, and realizes efficient cascade utilization of energy.

[0007] In order to solve the above technical problems, the utility model adopts the following technical solutions: a dual-source coupled heat pump system, including an air source heat pump unit, an evaporator of a water source heat pump unit, a condenser of a water source heat pump unit, an energy storage tank, a water storage tank, a first heat user and a second heat user, the energy storage tank is provided with a first water supply pipe, a first water return pipe, a second water supply pipe, a second water return pipe, a water supply pipe of the energy storage tank, and a water return pipe of the energy storage tank, the first water supply pipe is connected to the water outlet of the air source heat pump unit, and a water storage tank is provided at the inlet of the energy storage tank. The first electric valve, the first return pipe is connected to the heat source return port of the air source heat pump unit, and the second electric valve is arranged at the outlet of the energy storage water tank; the second water supply pipe is connected to the water outlet of the evaporator of the water source heat pump unit, and the second return pipe is connected to the evaporator return port of the water source heat pump unit; the energy storage water tank supply pipe is connected to the first heat user water supply pipe, and a third electric valve is arranged at the outlet of the energy storage water tank supply pipe, the energy storage water tank return pipe is connected to the first heat user return pipe, and a fourth electric valve is arranged at the inlet of the energy storage water tank return pipe;

[0008] The water storage tank is provided with a third water supply pipe, a third water return pipe, a fourth water supply pipe, a fourth water return pipe, a water storage tank water supply pipe and a water storage tank return pipe. The third water supply pipe is connected to the heat source water outlet of the air source heat pump unit, and a fifth electric valve is arranged at the entrance of the water storage tank. The third water return pipe is connected to the heat source water return port of the air source heat pump unit, and a sixth electric valve is arranged at the outlet of the water storage tank; the fourth water supply pipe is connected to the condenser water outlet of the water source heat pump unit, and a seventh electric valve is arranged therebetween. The fourth water return pipe is connected to the condenser water return port of the water source heat pump unit, and an eighth electric valve is arranged therebetween. The water storage tank water supply pipe is connected to the second heat user water supply pipe, and the water storage tank return pipe is connected to the second heat user return pipe;

[0009] The heat source outlet of the air source heat pump unit is bypassed to connect the first heat user water supply pipe, the bypass is located between the two water tank water supply pipes, and the bypass is provided with a ninth electric valve; the heat source return outlet of the air source heat pump unit is bypassed to connect the first heat user return pipe, the bypass is located between the two water tank return pipes, and the bypass is provided with a tenth electric valve;

[0010] Circulating water pumps are installed on the pipelines between the air source heat pump unit and the energy storage water tank, on the pipelines between the energy storage water tank and the first heat user, on the pipelines between the energy storage water tank and the evaporator of the water source heat pump unit, on the pipelines between the condenser of the water source heat pump unit and the water storage tank, and on the pipelines between the water storage tank and the second heat user.

[0011] Furthermore, it includes a cooling tower, a water source heat pump unit condenser outlet bypass connected to the cooling tower water inlet pipe, the bypass is located between the water source heat pump unit condenser outlet and the seventh electric valve, and the bypass is provided with an eleventh electric valve; the water source heat pump unit condenser return outlet bypass connected to the cooling tower return pipe, the bypass is located between the water source heat pump unit condenser return outlet and the eighth electric valve, and the bypass is provided with a twelfth electric valve; a circulating water pump is provided on the pipeline between the water source heat pump unit condenser and the cooling tower return pipe.

[0012] Furthermore, rubber hoses are used to connect the front and back of each circulating water pump inlet for system shock absorption.

[0013] Furthermore, filters for filtering the water system are respectively arranged before the inlet of each circulating water pump.

[0014] Furthermore, the filter is a Y-type filter.

[0015] Furthermore, it includes a soft water system, which is connected to the energy storage tank, the water storage tank and the cooling tower to provide constant pressure water replenishment for the system.

[0016] Furthermore, the air source heat pump unit is a plurality of air source heat pumps connected in parallel, and the water source heat pump unit is a plurality of water source heat pumps connected in parallel.

[0017] Furthermore, the energy storage water tank adopts a group of coil-type immersed heat exchangers.

[0018] Furthermore, the coil-type immersed heat exchanger is composed of more than one tube bundle bundled together.

[0019] Furthermore, the first water supply pipe, the second water supply pipe and the energy storage tank return pipe are located at the top of the energy storage tank, and the first return pipe, the second return pipe and the energy storage tank water supply pipe are located at the bottom of the side of the energy storage tank.

[0020] Compared with the prior art, the utility model has the following beneficial effects:

[0021] 1. It can realize flexible coupling and decoupling operation of dual-source heat pump system. In summer, the single-pole system can be used to provide cooling for users; in winter, the system operation strategy can be switched according to the ambient temperature. In extremely low temperature environment, the coupling system is used to "reduce the burden" of the air source heat pump, and reasonable load distribution can realize the operation of the unit at a high COP level.

[0022] 2. The design of the energy storage device in the water loop of the utility model can effectively solve the problem of high switching frequency of the system, improve the overall stability of the system, and realize efficient cascade utilization of system energy.

[0023] 3. In the dual-source coupled heating mode of the utility model, the water circuit in the system forms a closed loop, which can meet the water source demand of the water source heat pump unit, realize stable operation of the system, and effectively expand the applicable scenarios of the utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the technical solutions of the utility model are further described in detail below through the accompanying drawings and embodiments.

[0025] Figure 1 It is a schematic diagram of the utility model;

[0026] Figure 2 It is a schematic diagram of the connection mode and structure of the energy storage water tank pipeline;

[0027] Figure 3 This is a schematic diagram of the pipeline operation of the utility model when the low-temperature air source heat pump unit operates alone and provides cold and hot water to heat users through the energy storage water tank;

[0028] Figure 4 This is a schematic diagram of the pipeline operation of the low-temperature air source heat pump unit in the utility model to directly provide cold and hot water to heat users;

[0029] Figure 5 This is a schematic diagram of the refrigeration operation of the utility model in a water source heat pump unit;

[0030] Figure 6 This is a schematic diagram of the utility model operating in dual-source coupling mode.

[0031] In the figure: 1- low temperature air source heat pump unit, 2- fifth circulating water pump, 3- first heat user, 4- screw water source heat pump unit evaporator, 5- screw water source heat pump unit condenser, 6- wet cooling tower, 7- sixth circulating water pump, 8- third circulating water pump, 9- second heat user, 10- fourth circulating water pump, 11- soft water system, 12- second circulating water pump, 13- first circulating water pump, 14- first water supply pipe, 15- first water return pipe, 16- second water supply pipe, 17- second water return pipe, 18- energy storage tank water supply pipe, 19- energy storage tank water return pipe, 20- coil type immersion heat exchanger;

[0032] A-energy storage tank, B-water tank, a-first electric valve, b-ninth electric valve, c-fifth electric valve, d-seventh electric valve, e-eighth electric valve, f-sixth electric valve, g-tenth electric valve, h-second electric valve, i-third electric valve, j-eleventh electric valve, k-twelfth electric valve, l-fourth electric valve. DETAILED DESCRIPTION

[0033] The present invention is further described below in conjunction with specific preferred embodiments, but the protection scope of the present invention is not limited thereby.

[0034] For the convenience of description, the relative position relationship of each component, such as left, right, top, bottom, etc., is described according to the layout direction of the drawings in the specification, and does not limit the structure of this patent.

[0035] In the description of the present utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0036] like Figure 1 As shown, an embodiment of a dual-source coupled heat pump system of the utility model includes a low-temperature air source heat pump unit 1, a fifth circulating water pump 2, a first heat user 3, an evaporator 4 of a screw water source heat pump unit, a condenser 5 of a screw water source heat pump unit, a wet cooling tower 6, a sixth circulating water pump 7, a third circulating water pump 8, a second heat user 9, a fourth circulating water pump 10, a soft water system 11, a second circulating water pump 12, a first circulating water pump 13, an energy storage tank A, a water storage tank B, a first electric valve a, a ninth electric valve b, a fifth electric valve c, a seventh electric valve d, an eighth electric valve e, a sixth electric valve f, a tenth electric valve g, a second electric valve h, a third electric valve i, an eleventh electric valve j, a twelfth electric valve k and a fourth electric valve l.

[0037] The low-temperature air source heat pump unit 1 provides a higher heating capacity for multiple groups of air source heat pumps connected in parallel, and the water source heat pump unit provides a higher heating capacity for multiple groups of water source heat pumps connected in parallel.

[0038] like Figure 2 As shown, the energy storage tank A adopts a group of coil-type immersed heat exchangers 20, which can be bundled together by more than one tube bundle. Valley electricity is used to auxiliary heat the low-temperature water to a set temperature. The first water supply pipe 14 at the top of the energy storage water tank A is connected to the heat source water outlet pipe of the low-temperature air source heat pump unit 1, and a first electric valve a is arranged at the entrance of the energy storage water tank A; the first return pipe 15 at the bottom of the right side of the energy storage water tank A is connected to the heat source return port of the low-temperature air source heat pump unit 1, and a second electric valve h is arranged at the outlet of the energy storage water tank A; the second water supply pipe 16 at the top of the energy storage water tank A is connected to the water outlet of the evaporator 4 of the screw water source heat pump unit; the second return pipe 17 at the bottom of the left side of the energy storage water tank A is connected to the return port of the evaporator 4 of the screw water source heat pump unit; the energy storage water tank water supply pipe 18 at the bottom of the left side of the energy storage water tank A is connected to the first heat user 3 water supply pipe, and a third electric valve i is arranged at the outlet of the energy storage water tank water supply pipe 18; the energy storage water tank return pipe 19 at the top of the energy storage water tank A is connected to the return pipe of the first heat user 3, and a fourth electric valve l is arranged at the entrance of the energy storage water tank return pipe 19. Energy storage tank A can realize valley electricity heat storage during coupled operation and decoupled heating operation; and energy storage tank A is connected to the user side for peak electricity heating, saving operating costs; in addition, energy storage tank A has a voltage stabilizing and buffering function, which can improve the energy efficiency and stability of the system.

[0039] The third water supply pipe at the top of water tank B is connected to the water outlet of the heat source of the low-temperature air source heat pump unit 1, and a fifth electric valve c is arranged at the entrance of water tank B; the third return pipe at the bottom of the side of water tank B is connected to the return water outlet of the heat source of the low-temperature air source heat pump unit 1, and a sixth electric valve f is arranged at the outlet of water tank B; the fourth water supply pipe at the top of water tank B is connected to the water outlet of the condenser 5 of the screw water source heat pump unit, and a seventh electric valve d is arranged in between; the fourth return pipe at the bottom of the side of water tank is connected to the return water outlet of the condenser 5 of the screw water source heat pump unit, and an eighth electric valve e is arranged in between; the water supply pipe of the water tank at the bottom of the side of water tank B is connected to the water supply pipe of the second heat user 9; the water return pipe of the water tank at the top of water tank B is connected to the return pipe of the second heat user 9.

[0040] The heat source water outlet of the low-temperature air source heat pump unit 1 is connected to the water supply pipe of the first heat user 3 through a bypass, the bypass is located between the water supply pipes of the two water tanks, and the bypass is provided with a ninth electric valve b; the heat source return water outlet of the air source heat pump unit 1 is connected to the return water pipe of the first heat user 3 through a bypass, the bypass is located between the return water pipes of the two water tanks, and the bypass is provided with a tenth electric valve g.

[0041] The water outlet of the screw water source heat pump unit condenser 5 is connected to the upper water inlet pipe of the wet cooling tower 6 through a bypass, the bypass is located between the water outlet of the screw water source heat pump unit condenser 5 and the seventh electric valve d, and the bypass is provided with an eleventh electric valve j; the return water port of the screw water source heat pump unit condenser 5 is connected to the return water pipe at the bottom of the wet cooling tower 6 through a bypass, the bypass is located between the return water port of the screw water source heat pump unit condenser and the eighth electric valve e, and the bypass is provided with a twelfth electric valve k.

[0042] A first circulating water pump 13 is provided on the pipeline between the low-temperature air source heat pump unit 1 and the energy storage water tank A, a fifth circulating water pump 2 is provided on the pipeline between the energy storage water tank A and the first heat user 3, a second circulating water pump 12 is provided on the pipeline between the energy storage water tank A and the evaporator 4 of the screw water source heat pump unit, a third circulating water pump 8 is provided on the pipeline between the condenser 5 of the screw water source heat pump unit and the water storage tank B, a sixth circulating water pump 7 is provided on the pipeline between the water storage tank B and the second heat user 9, and a fourth circulating water pump 10 is provided on the pipeline between the condenser 5 of the screw water source heat pump unit and the return pipe of the cooling tower 6, and the circulating water pump is used to provide power for the system water circulation.

[0043] Rubber hoses are used to connect the inlet of each circulating water pump to reduce the shock of the system. A filter for filtering the water system is set in front of the inlet of each circulating water pump. The filter is a Y-type filter. The soft water system 11 is connected to the energy storage tank A, the water storage tank B and the wet cooling tower 6 to provide constant pressure water for the system.

[0044] The utility model forms the first, second, third and fourth circulation pipelines respectively through the opening and closing control of twelve solenoid valves to realize different operation modes, and can realize the switching between single-source and dual-source systems and multiple heating (cooling) modes. In coupled operation, the dual-source heat pump unit and the water tank constitute the first circulation pipeline. In decoupled operation, the low-temperature air source heat pump unit 1 is directly connected to the heat user to form the second circulation pipeline; the low-temperature air source heat pump unit 1, the energy storage water tank A and the heat user constitute the third circulation pipeline to realize heating (cooling); the water source heat pump unit, the energy storage water tank A, the wet cooling tower 6 and the heat user constitute the fourth circulation pipeline to cool the heat user.

[0045] Specifically, during coupled operation, in the first circulation pipeline, the low-temperature air source heat pump unit 1 is connected to the energy storage tank A through a pipeline to form a primary loop, and the medium-temperature water produced by the low-temperature air source heat pump unit 1 is stored in the energy storage tank A; the evaporator 4 of the screw water source heat pump unit is connected to the energy storage tank A through a pipeline to form a secondary loop, and the condenser 5 of the screw water source heat pump unit continues to heat the medium-temperature water as the water source to the target temperature and then transports it to the tertiary loop formed by the water source heat pump unit and the water storage tank B, and supplies it to the second heat user 9 for use.

[0046] During decoupling operation, in the second circulation pipeline, the low-temperature air source heat pump unit 1 is directly connected to the first heat user 3 , and the low-temperature air source heat pump unit 1 directly heats (cools) the first heat user 3 .

[0047] In the third circulation pipeline, the low-temperature air source heat pump unit 1, the energy storage water tank A and the first heat user 3 are connected through a pipeline. The low-temperature air source heat pump unit 1 produces hot (cold) water and stores it in the energy storage water tank A to heat (cool) the first heat user 3.

[0048] In the fourth circulation pipeline, the evaporator 4 of the screw water source heat pump unit uses the energy storage tank A as the water source, and forms a circulation pipeline with the wet cooling tower 6 and the first heat user 3 to produce cooling capacity for the heat user.

[0049] The utility model uses the energy storage water tank A as an intermediate heat source to connect the primary and secondary water systems, and uses the water storage tank B as an intermediate buffer heat exchange device. The operation mode can be flexibly selected and switched according to load requirements and ambient temperature. Figure 3~Figure 6 It is a schematic diagram of four operating modes of the flexible coupling and decoupling operation heat pump system according to this embodiment. The working modes include at least: low-temperature air source heat pump unit 1 + energy storage tank A function mode, low-temperature air source heat pump unit 1 direct supply mode, water source heat pump unit cooling mode, and dual-source coupling operation mode.

[0050] When heat load demand is low and ambient temperature is low:

[0051] Select the low-temperature air source heat pump unit 1 + energy storage tank A function mode. The energy storage tank A uses peak electricity heating to assist the low-temperature air source heat pump unit 1 in heating. At this time, the system opens the first electric valve a, the third electric valve i, the second electric valve h, the fourth electric valve l, the fifth circulating water pump 2, and the first circulating water pump 13.

[0052] When the heating (cooling) load demand is low and the ambient temperature is high:

[0053] The low-temperature air source heat pump unit 1 is selected to operate in the decoupled direct supply mode to directly provide heat (cold) to the heat user. At this time, the system turns on the ninth electric valve b, the tenth electric valve g, the fifth circulating water pump 2, and the first circulating water pump 13.

[0054] When heat load demand is high and ambient temperature is low:

[0055] Select the dual-source coupling operation mode, and appropriately reduce the heating temperature of the low-temperature air source heat pump unit 1 to 15~20℃ and transmit it to the energy storage tank A, and turn on the peak electricity heating of the energy storage tank A to assist in heating. The water source heat pump unit will perform secondary heating on the medium-temperature water in the energy storage tank A to 45~50℃ for heating users.

[0056] When the heat load demand is high and the ambient temperature is high:

[0057] Selecting the dual-source coupling operation mode allows the low-temperature air source heat pump unit 1 to produce 25~35℃ medium-temperature hot water and transport it to the energy storage tank A. The water source heat pump unit performs secondary heating of the medium-temperature water in the energy storage tank A to 45~50℃ for heating users. Energy storage tank A is used as a peak-shaving energy storage device and can be flexibly set according to the load.

[0058] It is understood that the present invention is described by some embodiments, and those skilled in the art are aware that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application belong to the scope protected by the present invention.

Claims

1. A dual-source coupled heat pump system, characterized in that: It includes an air source heat pump unit, an evaporator of a water source heat pump unit, a condenser of a water source heat pump unit, an energy storage water tank, a water storage tank, a first heat user and a second heat user. The energy storage water tank is provided with a first water supply pipe, a first water return pipe, a second water supply pipe, a second water return pipe, a water supply pipe of the energy storage water tank and a water return pipe of the energy storage water tank. The first water supply pipe is connected with the water outlet of the air source heat pump unit, and a first electric valve is arranged at the inlet of the energy storage water tank. The first water return pipe is connected with the water return port of the heat source of the air source heat pump unit, and a second electric valve is arranged at the outlet of the energy storage water tank; the second water supply pipe is connected with the water outlet of the evaporator of the water source heat pump unit, and the second water return pipe is connected with the water return port of the evaporator of the water source heat pump unit; the water supply pipe of the energy storage water tank is connected with the water supply pipe of the first heat user, and a third electric valve is arranged at the outlet of the water supply pipe of the energy storage water tank, the water return pipe of the energy storage water tank is connected with the water return pipe of the first heat user, and a fourth electric valve is arranged at the inlet of the water return pipe of the energy storage water tank; The water storage tank is provided with a third water supply pipe, a third water return pipe, a fourth water supply pipe, a fourth water return pipe, a water storage tank water supply pipe and a water storage tank return pipe. The third water supply pipe is connected to the heat source water outlet of the air source heat pump unit, and a fifth electric valve is arranged at the entrance of the water storage tank. The third water return pipe is connected to the heat source water return port of the air source heat pump unit, and a sixth electric valve is arranged at the outlet of the water storage tank; the fourth water supply pipe is connected to the condenser water outlet of the water source heat pump unit, and a seventh electric valve is arranged therebetween. The fourth water return pipe is connected to the condenser water return port of the water source heat pump unit, and an eighth electric valve is arranged therebetween. The water storage tank water supply pipe is connected to the second heat user water supply pipe, and the water storage tank return pipe is connected to the second heat user return pipe; The heat source outlet of the air source heat pump unit is bypassed to connect the first heat user water supply pipe, the bypass is located between the two water tank water supply pipes, and the bypass is provided with a ninth electric valve; the heat source return outlet of the air source heat pump unit is bypassed to connect the first heat user return pipe, the bypass is located between the two water tank return pipes, and the bypass is provided with a tenth electric valve; Circulating water pumps are installed on the pipelines between the air source heat pump unit and the energy storage water tank, on the pipelines between the energy storage water tank and the first heat user, on the pipelines between the energy storage water tank and the evaporator of the water source heat pump unit, on the pipelines between the condenser of the water source heat pump unit and the water storage tank, and on the pipelines between the water storage tank and the second heat user.

2. The dual-source coupled heat pump system according to claim 1, characterized in that: It includes a cooling tower, a water source heat pump unit condenser outlet bypass connected to the cooling tower water inlet pipe, the bypass is located between the water source heat pump unit condenser outlet and the seventh electric valve, and the bypass is provided with an eleventh electric valve; the water source heat pump unit condenser return outlet bypass connected to the cooling tower return pipe, the bypass is located between the water source heat pump unit condenser return outlet and the eighth electric valve, and the bypass is provided with a twelfth electric valve; a circulating water pump is provided on the pipeline between the water source heat pump unit condenser and the cooling tower return pipe.

3. The dual-source coupled heat pump system according to claim 2, characterized in that: Rubber hoses are used to connect the front and back of each circulating water pump inlet for system shock absorption.

4. The dual-source coupled heat pump system according to claim 2 or 3, characterized in that: A filter for filtering the water system is provided before the inlet of each circulating water pump.

5. The dual-source coupled heat pump system according to claim 4, characterized in that: The filter is a Y-type filter.

6. The dual-source coupled heat pump system according to claim 2, characterized in that: It includes a soft water system, which is connected to the energy storage tank, the water storage tank and the cooling tower to provide constant pressure water replenishment for the system.

7. The dual-source coupled heat pump system according to claim 1, characterized in that: The air source heat pump unit is a plurality of air source heat pumps connected in parallel, and the water source heat pump unit is a plurality of water source heat pumps connected in parallel.

8. The dual-source coupled heat pump system according to claim 1, characterized in that: The energy storage tank uses a set of coil-type immersed heat exchangers.

9. The dual-source coupled heat pump system according to claim 8, characterized in that: Coil-type immersed heat exchangers consist of more than one tube bundle tied together.

10. The dual-source coupled heat pump system according to claim 1, characterized in that: The first water supply pipe, the second water supply pipe and the energy storage water tank return pipe are located at the top of the energy storage water tank, and the first return pipe, the second return pipe and the energy storage water tank supply pipe are located at the bottom of the side of the energy storage water tank.

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