Heat storage and exchange device and solar energy and air energy combined cooling and heating system containing the device

Abstract

The present invention provides a heat storage and exchange device and a solar energy and air energy combined heat and cold supply system including the device. The heat storage and exchange device includes an outer shell, an inner shell and an insulation layer. The inner shell is provided with a water inlet, a water outlet, a heat pump medium inlet, a heat pump medium outlet, a solar energy medium inlet and a solar energy medium outlet. An inner coil is provided in the inner shell, and a sleeve coil is provided on part of the inner coil. The solar energy and air energy combined heat and cold supply system including the device also includes a solar energy collection system, an air source heat pump heating and cooling unit, a fan coil terminal system and a floor heating coil terminal system. The solar energy and air energy combined heat and cold supply system realizes the organic combination of solar energy and air source heat pump, has low cost, and effectively solves the problems of high-voltage protection and frequent startup in the operation of the heat pump main unit.

Description

Technical Field

[0001] The invention relates to a solar energy and air energy comprehensive utilization system, and in particular to a heat storage and exchange device and a solar energy and air energy combined cooling and heating system comprising the device. Background Art

[0002] The solar thermal and air source heat pump combined hot water, heating, and cooling system (hereinafter referred to as the solar and air energy combined heating and cooling system) can achieve the complementary advantages of clean solar energy and air energy, and is the development direction of multi-energy complementary heating and cooling in non-central heating areas. However, the solar and air energy combined heating and cooling system is still in the research and development and testing stage. Considering the requirements for the isolation of domestic hot water and heat exchange medium, the heat storage and exchange device used in this system generally adopts a double-coil closed water tank structure, which is used to couple two or more heat sources, store heat and exchange heat through a heat exchanger, and then supply heat to the heating terminal. The solar collector circulates the temperature difference with the water tank through a set of coils to provide domestic hot water energy; the air source heat pump heating and cooling unit is connected to another set of coils, which is used to heat the water in the water tank when solar energy is insufficient. At the same time, the air source heat pump heating and cooling unit provides winter heating or summer cooling. In winter, when heating, turn on the heating mode, turn off the fan coil, and use the floor heating coil for radiant heating; in summer, when cooling, turn on the cooling mode, turn off the floor heating coil, and turn on the fan coil. The circulation pipelines of the two energy sources operate separately, without achieving an organic combination, and cannot give full play to the advantages of solar energy in medium and low temperature heat utilization.

[0003] During use, when the water temperature in the water tank is insufficient, and domestic hot water is given priority, the heating pipeline needs to be shut down and the heat pump needs to be started to produce hot water. Continuous heating is not possible, and there is a problem of high-pressure protection caused by the high heating power of the heat pump, the heat discharged by the compressor cannot be released in time, and the heat exchange speed of the coil is slow. In addition, due to the small amount of medium in the coil and the small amount of stored energy, the heat pump unit is prone to frequent start-up, resulting in a shortened lifespan. If a buffer water tank is added to reduce the number of starts and stops of the main unit, it needs to be set up in all heating circuits, cooling circuits, and hot water circuits, which increases the complexity and cost of the system, and also increases the heat loss of the system. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a heat storage and exchange device which organically combines solar energy and air source heat pumps, fully utilizes solar energy resources, has low cost, and effectively solves the problems of high-pressure protection and frequent startup of the heat pump main unit when making hot water, and a solar energy and air energy combined heating and cooling system including the device.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: a heat storage and exchange device, including an outer shell, an inner shell and an insulation layer between the outer shell and the inner shell, a water inlet, a water outlet, a heat pump medium inlet, a heat pump medium outlet, a solar medium inlet and a solar medium outlet are provided on the inner shell, the heat pump medium outlet, the solar medium inlet and the solar medium outlet are directly connected to the inner shell, an inner coil is provided in the inner shell, the water inlet and the water outlet are respectively connected to the two ends of the inner coil and sealed, a sleeve coil is provided on a part of the pipe section of the inner coil and is sleeved on the outside, the inner diameter of the sleeve coil is larger than the outer diameter of the inner coil, the overlapping part of the inner coil and the sleeve coil forms a clamping cavity, one end of the sleeve coil is open, and the other end connects the clamping cavity between the inner coil and the sleeve coil with the heat pump medium inlet through a adapter.

[0006] Preferably, the adapter comprises an inner coil interface, a sleeve coil interface and a medium inlet, the inner coil passes through the inner coil interface and the sleeve coil interface, and is connected and sealed at the inner coil interface, the sleeve coil is connected and sealed to the sleeve coil interface, and the medium inlet is connected and sealed to the heat pump medium inlet. After the heat pump circulating medium enters from the heat pump medium inlet, it flows through the sandwich cavity between the inner coil and the sleeve coil, and then flows out from the open end of the sleeve coil and enters the inner tank.

[0007] Preferably, the inner tank is provided with an upper temperature probe located at the upper part thereof and a lower temperature probe located at the lower part thereof. The upper temperature probe monitors the temperature of the upper area of ​​the inner tank, which is recorded as T2, so as to display and control the outlet water temperature and control the flow rate of the heat pump medium, and the lower temperature probe monitors the temperature of the lower area of ​​the inner tank, which is recorded as T3, so as to control the solar temperature difference cycle.

[0008] Preferably, an exhaust port is provided at the top of the inner container, and an automatic exhaust valve is provided at the exhaust port or the exhaust port is used as a supplementary port for the medium.

[0009] At the same time, the present invention also provides a solar energy and air energy combined heating and cooling system, comprising the above-mentioned heat storage and exchange device, and also comprising a solar energy heat collection system, an air source heat pump heating and cooling unit, a water supply main pipe and a return water main pipe, wherein the water supply main pipe and the return water main pipe are connected to the heating and cooling terminals;

[0010] The solar thermal collection system includes a solar thermal collector, a heat collection circulation pump, a liquid replenishing valve and a pipeline; the solar medium outlet, the heat collection circulation pump and the water inlet of the solar thermal collector are connected in sequence through pipelines, the solar medium inlet is connected to the water outlet of the solar thermal collector through a pipeline, the liquid replenishing valve is connected to the solar thermal collector through a pipeline, and a heat collection temperature probe is provided on the solar thermal collector, and the measured temperature is recorded as T1;

[0011] The air source heat pump cooling and heating unit comprises a heat pump host and a heat pump circulation pump, and the heat pump host is provided with a heat pump water supply port and a heat pump water return port;

[0012] The water inlet of the heat storage and exchange device is connected to the tap water supply pipeline, and the water outlet is connected to the domestic hot water pipeline. The heat pump medium outlet is connected to the heat pump return port through a pipeline, and the heat pump medium inlet is connected to the heat pump water supply port through a pipeline. An electrically controlled three-way valve 1 and an electrically controlled three-way valve 2 are arranged between the heat pump medium inlet and the heat pump water supply port. The heat pump medium inlet is connected to the outlet B of the electrically controlled three-way valve 1, the inlet A of the electrically controlled three-way valve 1 is connected to the inlet a of the electrically controlled three-way valve 2, the reversing port C of the electrically controlled three-way valve 1 is connected to the heat pump circulation pump and the heat pump return port in sequence through a pipeline, the outlet b of the electrically controlled three-way valve 2 is connected to the heat pump water supply port through a pipeline, the reversing port c of the electrically controlled three-way valve 2 is connected to the return water main pipe, and the heat pump water supply port is connected to the water supply main pipe through a pipeline.

[0013] In the solar circulation mode, when T3 is lower than the set temperature, the heat collection temperature difference circulation is turned on. The set temperature difference for starting the heat collection circulation pump is recorded as Δt1, and the set temperature difference for shutting down is recorded as Δt2. When the temperature difference between T1 and T3 is greater than or equal to Δt1, the heat collection circulation pump is started, and when the temperature difference between T1 and T3 is less than or equal to Δt2, the heat collection circulation pump is shut down.

[0014] During heating, start the heat pump main unit heating mode, the inlet A and outlet B of the electric three-way valve 1 are connected, the inlet a and the reversing port c of the electric three-way valve 2 are connected, the heat pump circulation pump is started, and the medium in the pipeline flows out from the heat pump water supply port, flows through the water supply main pipe to reach the heating and cooling terminals to release heat, then flows to the inner tank of the heat storage and exchange device for preheating, and then returns to the heat pump return water port to perform heat exchange in the heat pump main unit. This cycle is repeated, and the heat pump return water temperature is recorded as T4. When T4 reaches the set value, turn off the heat pump main unit and the heat pump circulation pump.

[0015] During cooling, start the cooling mode of the heat pump host, the inlet A of the electric three-way valve 1 is connected to the reversing port C, the inlet a of the electric three-way valve 2 is connected to the reversing port c, the heat pump circulation pump is started, and the medium in the pipeline flows out from the heat pump water supply port, flows through the water supply main pipe, reaches the heating and cooling end to absorb heat, and then returns to the heat pump return port to perform heat exchange in the heat pump host. This cycle is repeated. When T4 reaches the set value, turn off the heat pump host and the heat pump circulation pump.

[0016] When using hot water alone, tap water enters from the water inlet, is heated by the inner coil, and flows out from the water outlet. When the temperature T2 is lower than the set value, the heat pump main unit heating mode is started, the inlet A and outlet B of the electric three-way valve 1 are connected, the inlet a and outlet b of the electric three-way valve 2 are connected, the heat pump circulation pump is started, the medium in the pipeline flows out from the heat pump water supply port, enters the heat pump medium inlet, and then flows out through the heat pump medium outlet, returns to the heat pump return port, and performs heat exchange in the heat pump main unit, and this cycle is repeated until the temperature T2 reaches the set value, the heat pump main unit is turned off, and the heat pump circulation pump is turned off.

[0017] Preferably, the heating and cooling terminals include a fan coil terminal system and a floor heating coil terminal system, the fan coil terminal system includes a fan coil, a fan water supply pipeline, a fan return pipeline and a fan electric valve, the floor heating coil terminal system includes a floor heating coil, a manifold, a floor heating water supply pipeline and a floor heating return pipeline, the fan water supply pipeline and the floor heating water supply pipeline are connected to the water supply main, and the fan return pipeline and the floor heating return pipeline are connected to the return water main.

[0018] Preferably, the system further comprises a buffer water tank, which is a hollow closed water tank, the inlet of the buffer water tank is connected to the reversing port C of the electric-controlled three-way valve 1, and the outlet of the buffer water tank is connected to the return water port of the heat pump.

[0019] Preferably, the solar collector is a vacuum tube solar collector, and the liquid replenishment valve is a float type or diaphragm type automatic water control valve. The vacuum tube solar collector adopts an open structure and is provided with an exhaust pipe. The float type or diaphragm type automatic water control valve has the function of automatically controlling the water level. The medium enters the pipeline of the solar thermal collection system through the liquid replenishment valve, thereby replenishing the medium in the heat storage and exchange device.

[0020] The beneficial effects of the present invention are:

[0021] 1. The vacuum tube solar collector is directly connected to the atmosphere. The pressure inside the tank depends on the installation height. The system has a low operating pressure and does not require an expansion tank. It is highly safe. The material of the tank can be thinner than that of the closed type, saving costs.

[0022] 2. Domestic water is isolated from the medium of the inner tank, the water quality is clean, and the heat exchange between the inner coil and the outer coil is used to achieve continuous hot water supply;

[0023] 3. The solar thermal collection system heats the medium in the heat storage and exchange device through temperature difference circulation. During heating, the medium return water enters the heat storage and exchange device for preheating, absorbing the low-temperature heat energy of the inner tank, reducing the energy consumption of the air source heat pump cooling and heating unit, realizing the organic combination of solar energy and air energy, and improving the utilization rate of solar energy;

[0024] 4. When the heat pump main unit is heating, the medium enters the inner tank through the pipeline, and the heat is fully released, avoiding high-pressure protection and frequent startup of the heat pump main unit. When cooling, the buffer water tank is connected to the refrigeration circuit to prevent frequent startup and improve the stability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of a heat storage and exchange device of the present invention.

[0026] Figure 2 It is a schematic structural diagram of a converter of a heat storage and exchange device of the present invention.

[0027] Figure 3 It is a structural schematic diagram of a solar energy and air energy combined heating and cooling system of the present invention.

[0028] In the figure, 100: inner tank; 101: water inlet; 102: water outlet; 103: heat pump medium inlet; 104: heat pump medium outlet; 105: solar medium inlet; 106: solar medium outlet; 107: inner coil; 108: sleeve coil; 109: upper temperature probe; 110: lower temperature probe; 111: adapter; 112: exhaust port; 113: sleeve coil interface; 114: medium inlet; 115: inner coil interface; 200: solar thermal collection system; 201: solar thermal collector; 202: liquid replenishing valve; 300: heat pump main machine; 301: heat pump water supply port; 302: heat pump return port; 400: fan coil terminal system; 401: fan coil; 402: fan water supply pipeline; 403: fan return pipeline; 404: fan electric valve; 500: floor heating coil terminal system; 501: floor heating coil; 502: manifold; 503: floor heating water supply pipeline; 504: floor heating return pipeline; 600: water supply main; 700: return main; 800: buffer water tank; P1: heat collection circulation pump; P2: heat pump circulation pump; V1: electric control three-way valve one; V2: electric control three-way valve two. DETAILED DESCRIPTION

[0029] The technical solution of the present invention is further described in detail below in conjunction with embodiments.

[0030] like Figure 1 As shown, a heat storage and exchange device disclosed in the present invention comprises an outer shell, an inner shell 100 and an insulation layer between the outer shell and the inner shell 100, a water inlet 101, a water outlet 102, a heat pump medium inlet 103, a heat pump medium outlet 104, a solar medium inlet 105 and a solar medium outlet 106 are arranged on the inner shell 100, the heat pump medium outlet 104, the solar medium inlet 105 and the solar medium outlet 106 are directly connected to the inner shell 100, and an inner coil is arranged in the inner shell 100. 107, the water inlet 101 and the water outlet 102 are respectively connected to the two ends of the inner coil 107 and sealed, a sleeve coil 108 is provided on a part of the inner coil 107 and is sleeved on the outside, the inner diameter of the sleeve coil 108 is larger than the outer diameter of the inner coil 107, and the overlapping part of the inner coil 107 and the sleeve coil 108 forms a sandwich cavity, one end of the sleeve coil 108 is open, and the other end connects the sandwich cavity between the inner coil 107 and the sleeve coil 108 to the heat pump medium inlet 103 through the adapter 111.

[0031] Furthermore, if Figure 2As shown, the adapter 111 includes an inner coil interface 115, a sleeve coil interface 113 and a medium inlet 114. The inner coil 107 passes through the inner coil interface 115 and the sleeve coil interface 113, and is connected and sealed at the inner coil interface 115. The sleeve coil 108 is connected and sealed to the sleeve coil interface 113, and the medium inlet 114 is connected and sealed to the heat pump medium inlet 103. After entering from the heat pump medium inlet 103, the heat pump circulating medium flows through the sandwich cavity between the inner coil 107 and the sleeve coil 108, and then flows out from the open end of the sleeve coil 108 and enters the inner tank 100.

[0032] Furthermore, the inner tank 100 is provided with an upper temperature probe 109 located in the middle and upper part of the inner tank 100 and a lower temperature probe 110 located in the middle and lower part of the inner tank 100. The upper temperature probe 109 monitors the temperature of the upper area of ​​the inner tank 100, which is recorded as T2, so as to display and control the outlet water temperature and control the flow rate of the heat pump medium, and the lower temperature probe 110 monitors the temperature of the lower area of ​​the inner tank 100, which is recorded as T3, so as to control the solar temperature difference cycle.

[0033] Furthermore, an exhaust port 112 is provided at the top of the inner container 100 , and an automatic exhaust valve is provided at the exhaust port 112 .

[0034] At the same time, if Figure 3 As shown, the present invention also provides a solar energy and air energy combined heating and cooling system, comprising the above-mentioned heat storage and exchange device, and also comprising a solar energy heat collection system 200, an air source heat pump cooling and heating unit, a water supply main pipe 600 and a return water main pipe 700, wherein the water supply main pipe 600 and the return water main pipe 700 are connected to the heating and cooling terminals;

[0035] The solar thermal collection system 200 includes a solar thermal collector 201, a heat collection circulation pump P1, a liquid replenishing valve 202 and a pipeline; the solar medium outlet 106, the heat collection circulation pump P1 and the water inlet of the solar thermal collector 201 are connected in sequence through pipelines, the solar medium inlet 105 is connected to the water outlet of the solar thermal collector 201 through a pipeline, and the liquid replenishing valve 202 is connected to the solar thermal collector 201 through a pipeline. A heat collection temperature probe is provided on the solar thermal collector 201, and the measured temperature is recorded as T1;

[0036] The air source heat pump cooling and heating unit includes a heat pump host 300 and a heat pump circulation pump P2. The heat pump host 300 is provided with a heat pump water supply port 301 and a heat pump water return port 302.

[0037] The water inlet 101 of the heat storage and exchange device is connected to the tap water supply pipeline, the water outlet 102 is connected to the domestic hot water pipeline, the heat pump medium outlet 104 is connected to the heat pump return water port 302 through a pipeline, the heat pump medium inlet 103 is connected to the heat pump water supply port 301 through a pipeline, and an electric-controlled three-way valve V1 and an electric-controlled three-way valve V2 are arranged between the heat pump medium inlet 103 and the heat pump water supply port 301. The heat pump medium inlet 103 is connected to V1. Outlet B, inlet A of the electric-controlled three-way valve V1 is connected to inlet a of the electric-controlled three-way valve V2, the reversing port C of the electric-controlled three-way valve V1 is connected to the heat pump circulation pump P2 and the heat pump return water port 302 in sequence through pipelines, the outlet b of the electric-controlled three-way valve V2 is connected to the heat pump water supply port 301 through a pipeline, the reversing port c of the electric-controlled three-way valve V2 is connected to the return water main 700, and the heat pump water supply port 301 is connected to the water supply main 600 through a pipeline.

[0038] In the solar circulation mode, when T3 is lower than the set temperature, the heat collection temperature difference circulation is turned on. The set temperature difference for starting the heat collection circulation pump P1 is recorded as Δt1, and the set temperature difference for shutting down the heat collection circulation pump P1 is recorded as Δt2. When the temperature difference between T1 and T3 is greater than or equal to Δt1, the heat collection circulation pump P1 is started, and when the temperature difference between T1 and T3 is less than or equal to Δt2, the heat collection circulation pump P1 is shut down.

[0039] During heating, the heating mode of the heat pump host 300 is started, the inlet A and the outlet B of the electric three-way valve V1 are connected, the inlet a and the reversing port c of the electric three-way valve V2 are connected, the heat pump circulation pump P2 is started, and the medium in the pipeline flows out from the heat pump water supply port 301, flows through the water supply main pipe 600 to reach the heating and cooling terminals to release heat, and then flows to the inner tank 100 of the heat storage and exchange device for preheating, and then returns to the heat pump return water port 302, and heat exchange is carried out in the heat pump host 300. This cycle is repeated, and the heat pump return water temperature is recorded as T4. When T4 reaches the set value, the heat pump host 300 is turned off, and the heat pump circulation pump P2 is turned off.

[0040] During cooling, the cooling mode of the heat pump host 300 is started, the inlet A and the reversing port C of the electric three-way valve V1 are connected, the inlet a and the reversing port c of the electric three-way valve V2 are connected, the heat pump circulation pump P2 is started, and the medium in the pipeline flows out from the heat pump water supply port 301, flows through the water supply main pipe 600, reaches the heating and cooling end to absorb heat, and then returns to the heat pump return port 302, and heat exchange is carried out in the heat pump host 300. This cycle is repeated until T4 reaches the set value, then the heat pump host 300 is turned off, and the heat pump circulation pump P2 is turned off.

[0041] When hot water is used alone, tap water enters from the water inlet 101, is heated by the inner coil 107, and flows out from the water outlet 102. The temperature measured by the upper temperature probe 109 in the upper middle part of the inner tank 100 is recorded as T2. When the temperature T2 is lower than the set value, the heating mode of the heat pump host 300 is started, the inlet A and outlet B of the electric three-way valve V1 are connected, the inlet a and outlet b of the electric three-way valve V2 are connected, the heat pump circulation pump P2 is started, and the medium in the pipeline flows out from the heat pump water supply port 301, enters the heat pump medium inlet 103, and then flows out through the heat pump medium outlet 104, returns to the heat pump return water port 302, and performs heat exchange in the heat pump host 300. This cycle is repeated until the temperature T2 reaches the set value, the heat pump host 300 is turned off, and the heat pump circulation pump P2 is turned off.

[0042] Furthermore, the heating and cooling terminal includes a fan coil terminal system 400 and a floor heating coil terminal system 500, the fan coil terminal system 400 includes a fan coil 401, a fan water supply pipeline 402, a fan return pipeline 403 and a fan electric valve 404, the floor heating coil terminal system 500 includes a floor heating coil 501, a manifold 502, a floor heating water supply pipeline 503 and a floor heating return pipeline 504, the fan water supply pipeline 402 and the floor heating water supply pipeline 503 are connected to the water supply main 600, and the fan return pipeline 403 and the floor heating return pipeline 504 are connected to the return water main 700.

[0043] Furthermore, the system also includes a buffer water tank 800, which is a hollow closed water tank. The inlet of the buffer water tank 800 is connected to the reversing port C of the electric three-way valve V1, and the outlet of the buffer water tank 800 is connected to the heat pump return port 302.

[0044] Furthermore, the solar collector 201 is a vacuum tube solar collector, and the liquid replenishment valve 202 is a float type or diaphragm type automatic water control valve. The vacuum tube solar collector adopts an open structure and is provided with an exhaust pipe. The float type or diaphragm type automatic water control valve has the function of automatically controlling the water level. The medium enters the pipeline of the solar thermal collection system 200 through the liquid replenishment valve 202, thereby replenishing the medium in the heat storage and exchange device.

Claims

1. A heat storage and exchange device, characterized in that: The invention comprises an outer shell, an inner shell (100), and an insulation layer between the outer shell and the inner shell (100); the inner shell (100) is provided with a water inlet (101), a water outlet (102), a heat pump medium inlet (103), a heat pump medium outlet (104), a solar medium inlet (105), and a solar medium outlet (106); the heat pump medium outlet (104), the solar medium inlet (105), and the solar medium outlet (106) are all directly connected to the inner shell (100). An inner coil (107) is provided in the inner tank (100), the water inlet (101) and the water outlet (102) are respectively connected to the two ends of the inner coil (107) and sealed, a sleeve coil (108) is provided on a portion of the inner coil (107) and is sleeved on the outside of the inner coil (107), one end of the sleeve coil (108) is open, and the other end connects the cavity between the inner coil (107) and the sleeve coil (108) to the heat pump medium inlet (103) via an adapter (111).

2. A heat storage and exchange device according to claim 1, characterized in that: The adapter (111) comprises an inner coil interface (115), a sleeve coil interface (113) and a medium inlet (114); the inner coil (107) passes through the inner coil interface (115) and the sleeve coil interface (113) and is connected and sealed at the inner coil interface (115); the sleeve coil (108) is connected and sealed to the sleeve coil interface (113); and the medium inlet (114) is connected and sealed to the heat pump medium inlet (103).

3. A heat storage and exchange device according to claim 1, characterized in that: The inner liner (100) is provided with an upper temperature probe (109) located in the upper middle portion of the inner liner (100) and a lower temperature probe (110) located in the lower middle portion of the inner liner (100).

4. A heat storage and exchange device according to claim 1, characterized in that: An exhaust port (112) is provided at the top of the inner container (100).

5. A solar energy and air energy combined cooling and heating system, characterized by: A heat storage and exchange device comprising any one of claims 1 to 4, further comprising a solar heat collection system (200), an air source heat pump cooling and heating unit, a water supply main pipe (600) and a water return main pipe (700), wherein the water supply main pipe (600) and the water return main pipe (700) are connected to the heating and cooling terminals; The solar thermal collection system (200) comprises a solar thermal collector (201), a heat collection circulation pump (P1), a liquid replenishing valve (202) and a pipeline; the solar medium outlet (106), the heat collection circulation pump (P1) and the water inlet of the solar thermal collector (201) are connected in sequence through pipelines, the solar medium inlet (105) and the water outlet of the solar thermal collector (201) are connected through pipelines, the liquid replenishing valve (202) is connected to the solar thermal collector (201) through pipelines, and a heat collection temperature probe is provided on the solar thermal collector (201); The air source heat pump cooling and heating unit comprises a heat pump main unit (300) and a heat pump circulating pump (P2); the heat pump main unit (300) is provided with a heat pump water supply port (301) and a heat pump water return port (302); The water inlet (101) of the heat storage and exchange device is connected to a tap water supply pipeline, the water outlet (102) is connected to a domestic hot water pipeline, the heat pump medium outlet (104) is connected to a heat pump water return port (302) via a pipeline, the heat pump medium inlet (103) is connected to a heat pump water supply port (301) via a pipeline, an electric-controlled three-way valve 1 (V1) and an electric-controlled three-way valve 2 (V2) are provided between the heat pump medium inlet (103) and the heat pump water supply port (301), and the heat pump medium inlet (103) is connected to the electric-controlled three-way valve 1 ( The outlet B of the electric-controlled three-way valve 1 (V1) is connected to the outlet A of the electric-controlled three-way valve 2 (V2), the inlet A of the electric-controlled three-way valve 1 (V1) is connected to the inlet a of the electric-controlled three-way valve 2 (V2), the reversing port C of the electric-controlled three-way valve 1 (V1) is connected to the heat pump circulation pump (P2) and the heat pump return water port (302) in sequence through a pipeline, the outlet b of the electric-controlled three-way valve 2 (V2) is connected to the heat pump water supply port (301) through a pipeline, the reversing port c of the electric-controlled three-way valve 2 (V2) is connected to the return water main pipe (700), and the heat pump water supply port (301) is connected to the water supply main pipe (600) through a pipeline.

6. A solar energy and air energy combined cooling and heating system according to claim 5, characterized in that: The heating and cooling terminal comprises a fan coil terminal system (400) and a floor heating coil terminal system (500). The fan coil terminal system (400) comprises a fan coil (401), a fan water supply pipeline (402), a fan return pipeline (403) and a fan electric valve (404). The floor heating coil terminal system (500) comprises a floor heating coil (501), a manifold (502), a floor heating water supply pipeline (503) and a floor heating return pipeline (504). The fan water supply pipeline (402) and the floor heating water supply pipeline (503) are connected to a water supply main (600), and the fan return pipeline (403) and the floor heating return pipeline (504) are connected to a return water main (700).

7. The solar energy and air energy combined cooling and heating system according to claim 5 is characterized by: It also comprises a buffer water tank (800), which is a hollow closed water tank, the inlet of the buffer water tank (800) is connected to the reversing port C of the electric-controlled three-way valve 1 (V1), and the outlet of the buffer water tank (800) is connected to the heat pump return water port (302).

8. The solar energy and air energy combined cooling and heating system according to claim 5 is characterized by: The solar thermal collector (201) is a vacuum tube type solar thermal collector, and the liquid replenishment valve (202) is a float type or diaphragm type automatic water control valve.

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