Flexible and efficient PVT heat pump unit

Abstract

The invention provides a flexible and efficient PVT heat pump unit. The flexible and efficient PVT heat pump unit comprises a PVT photovoltaic photo-thermal power generation assembly and a heat pump unit body. The heat pump unit body is provided with a four-way reversing valve, an expansion valve, a liquid storage tank, a fluorine pump, a compressor, a first heat exchanger and a second heat exchanger, the compressor is connected between a first connector and a third connector of the four-way reversing valve, and the second heat exchanger is connected to a second connector of the four-way reversing valve. A PVT photovoltaic photo-thermal power generation assembly, a first heat exchanger and a second heat exchanger are connected to a fourth connector of the four-way reversing valve. One end of the liquid storage tank is connected with the first heat exchanger and the expansion valve, the expansion valve is connected with the second heat exchanger, and the other end of the liquid storage tank is connected with the fluorine pump and the PVT photovoltaic photo-thermal power generation assembly; the second heat exchanger is connected with the liquid storage tank; through an automatic control mode, different operation modes can be changed to adapt to different outdoor meteorological conditions and buildings, and the flexibility of the unit is high.

Description

Technical Field

[0001] The invention belongs to the field of renewable energy utilization, and specifically designs a flexible and efficient PVT heat pump unit. Background Art

[0002] Photovoltaic Thermal (PVT) technology can provide electricity and heat to buildings at the same time, which can significantly improve the overall efficiency and space utilization of solar energy systems. PVT heat pump units usually use PVT components as the evaporator of the heat pump, absorbing the heat generated by photovoltaic power generation and the heat in the air, and raising the temperature through the heat pump to supply domestic hot water or heating for buildings. Due to the high evaporation temperature, the PVT heat pump can produce higher hot water temperature than the air source heat pump, and the unit efficiency is high, which has better application potential.

[0003] In the previous design of PVT heat pump units, the operation of PVT heat pump units is affected by external factors such as local solar radiation and outdoor temperature, as well as fluctuations in building heat and electricity loads. Therefore, it is difficult to fully match the energy supply and energy consumption of PVT heat pump units. Sometimes the heat generated by the PVT heat pump cannot be absorbed, and sometimes the PVT heat pump cannot meet the needs of the building. When the building cannot absorb the heat generated by the unit, the PVT components have poor heat dissipation performance, causing the temperature of the photovoltaic cells to rise, and ultimately causing the PVT heat pump to shut down, the power generation efficiency of the PVT components to decrease, and the power generation to decrease. When the unit cannot meet the building's heat needs, it will affect the building's user experience. For example: when used in school dormitory buildings, during the summer vacation, there is very little demand for hot water, and the PVT heat pump stops running, which will cause the temperature of the PVT components to rise and reduce photovoltaic power generation.

[0004] In summary, current PVT heat pump units cannot be flexibly adjusted to adapt to different outdoor meteorological conditions and building loads. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a flexible and efficient PVT heat pump unit that can be flexibly adjusted to adapt to different outdoor meteorological conditions and building loads.

[0006] The technical solution of the present invention is: a flexible and efficient PVT heat pump unit, including a PVT photovoltaic thermal power generation component and a heat pump unit body; the heat pump unit body has a four-way reversing valve, an expansion valve, a liquid storage tank, a fluorine pump, a compressor, a first heat exchanger, and a second heat exchanger. A compressor is connected between the first interface and the third interface of the four-way reversing valve, the second interface of the four-way reversing valve is connected to the second heat exchanger, and the fourth interface of the four-way reversing valve is connected to the PVT photovoltaic thermal power generation component, the first heat exchanger and the second heat exchanger; one end of the liquid storage tank is connected to the first heat exchanger and the expansion valve, the expansion valve is connected to the second heat exchanger, and the other end of the liquid storage tank is connected to the fluorine pump and the PVT photovoltaic thermal power generation component; the second heat exchanger is connected to the liquid storage tank.

[0007] A first valve and a second valve are connected between the fourth interface of the four-way reversing valve and the PVT photovoltaic thermal power generation component; a third valve is connected between an end of the first valve close to the second valve and the first heat exchanger, a fourth valve is connected between an end of the first valve close to the second valve and the second heat exchanger, a fifth valve is connected between the second interface of the four-way reversing valve and the second heat exchanger, a seventh valve is connected between the expansion valve and the liquid storage tank, a sixth valve is connected in parallel to the expansion valve, an eighth valve is connected between the first heat exchanger and the seventh valve, a tenth valve is connected between the fluorine pump and the liquid storage tank, and a ninth valve is connected in parallel to the fluorine pump and the tenth valve.

[0008] Refrigerant pipelines are provided at both ends of the PVT photovoltaic thermal power generation component. The refrigerant pipeline at one end of the PVT photovoltaic thermal power generation component is connected to a first external interface valve, and the refrigerant pipeline at the other end of the PVT photovoltaic thermal power generation component is connected to a second external interface valve; the first external interface valve is connected to the first valve, and the second external interface valve is respectively connected to the fluorine pump and the ninth valve.

[0009] The first heat exchanger is an air heat exchanger, and a fan is provided on the first heat exchanger.

[0010] A gas-liquid separation device is provided between the first interface of the four-way reversing valve and the compressor.

[0011] A first check valve is arranged between the third interface of the four-way reversing valve and the compressor.

[0012] The output end of the fluorine pump is connected with a second check valve.

[0013] The second heat exchanger is a container heat exchanger, a shell and tube heat exchanger, a plate heat exchanger or a coil heat exchanger; the first heat exchanger is a fin coil heat exchanger.

[0014] The second heat exchanger is connected to a hot water storage tank; the second heat exchanger has a first heat exchanger joint and a second heat exchanger joint, the first heat exchanger joint and the second heat exchanger joint are both connected to the hot water storage tank through a water pipe, and a water pump is provided on the water pipe between the second heat exchanger joint and the hot water storage tank, and the water pump is used to pump water in the hot water storage tank into the second heat exchanger.

[0015] The number of the PVT photovoltaic thermal power generation components is at least two, and the PVT photovoltaic thermal power generation components are connected in series or in parallel.

[0016] Beneficial effects of the present invention:

[0017] (1) In the present invention, when the heat generated is greater than the user's heat load and cannot be stored, the excess heat is dissipated into the atmosphere through the fluorine pump and the first heat exchanger, thereby reducing the temperature of the PVT photovoltaic thermal component 1 and improving the power generation efficiency and power generation;

[0018] (2) When the heat output cannot meet the user's heat load demand, part of the heat can be provided from the first heat exchanger to supplement the heat output difference;

[0019] (3) Through automatic control, different operating modes can be switched to adapt to different outdoor weather conditions and buildings, and the unit is highly flexible. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of an implementation mode of a flexible and efficient PVT heat pump unit in the present invention.

[0021] Figure 2 It is a structural schematic diagram of another embodiment of the flexible and efficient PVT heat pump unit in the present invention. DETAILED DESCRIPTION

[0022] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and is in no way intended to limit the present invention and its application or use. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to make the present invention thorough and complete and to fully express the scope of the present invention to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the parts and steps, the composition of the materials, the numerical expressions and the numerical values ​​set forth in these embodiments should be interpreted as being merely exemplary, rather than as limitations.

[0023] The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different parts. The words "include" or "comprise" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0024] like Figure 1 and 2 As shown, a flexible and efficient PVT heat pump unit includes a PVT photovoltaic thermal power generation component 1 and a heat pump unit body 2; the heat pump unit body 2 has a four-way reversing valve 3, an expansion valve 7, a liquid storage tank 8, a fluorine pump 9, a compressor 5, a first heat exchanger 10, and a second heat exchanger 6, the compressor 5 is connected between the first interface and the third interface of the four-way reversing valve 3, the second interface of the four-way reversing valve 3 is connected to the second heat exchanger 10, and the fourth interface of the four-way reversing valve 3 is connected to the PVT photovoltaic thermal power generation component 1, the first heat exchanger 10 and the second heat exchanger 6; one end of the liquid storage tank 8 is connected to the first heat exchanger 10 and the expansion valve 7, the expansion valve 7 is connected to the second heat exchanger 6, the other end of the liquid storage tank 8 is connected to the fluorine pump 9 and the PVT photovoltaic thermal power generation component 1; the second heat exchanger 6 is connected to the liquid storage tank 8. In this embodiment, it has five operation modes, namely, a PVT heat pump basic heating mode, a heat dissipation operation mode, an air source heat pump operation mode, a heating increase operation mode, and a preheating operation mode.

[0025] In the basic heating mode of the PVT heat pump, the PVT photovoltaic thermal component 1, the four-way reversing valve 3, the compressor 5, the second heat exchanger 6, and the expansion valve 7 are in operation, and the first heat exchanger 10 and the fluorine pump 9 are not in operation; after the PVT photovoltaic thermal component 1 absorbs solar radiation, the PVT photovoltaic thermal component 1 generates electricity, and the generated electricity can be directly or through an inverter to supply the heat pump unit compressor 5, the fluorine pump 9 and other electrical equipment for use; the heat generated by the PVT photovoltaic thermal component 1 is absorbed by the refrigerant in the heat exchange mechanism behind it, and the refrigerant vapor after absorbing heat is transported to the four-way reversing valve 3, sucked by the compressor 5, and becomes the refrigerant superheated vapor after being pressurized and heated by the compressor 5. The refrigerant superheated vapor passes through the outlet of the compressor 5 to the second heat exchanger 6, and exchanges heat with water or other media in the second heat exchanger 6 to become a high-pressure supercooled refrigerant liquid. The high-pressure supercooled refrigerant solution passes through the expansion valve 7 and isenthalpic pressure reduction and then enters the PVT photovoltaic thermal component 1 again to absorb heat and become the refrigerant superheated vapor, completing the basic heating cycle.

[0026] In the heat dissipation operation mode, the PVT photovoltaic thermal component 1, the first heat exchanger 10, and the fluorine pump 9 are in operation, and the four-way reversing valve 3, the compressor 5, and the second heat exchanger 6 are not in operation; after the PVT photovoltaic thermal component 1 absorbs solar radiation, the PVT photovoltaic thermal component 1 generates electricity, and the generated electricity can be directly or through an inverter to be supplied to electrical equipment such as the heat pump unit compressor 5 and the fluorine pump 9, and the heat generated by the PVT photovoltaic thermal component 1 is absorbed by the refrigerant in the heat exchange mechanism behind it, and the refrigerant vapor after absorbing heat is transported to the first heat exchanger 10, cooled by the first heat exchanger 10, and the cooled refrigerant liquid is sent back to the PVT photovoltaic thermal component 1 by the fluorine pump 9 to absorb heat to cool the component, completing the cycle.

[0027] In the air source heat pump operation mode, the first heat exchanger 10, the four-way reversing valve 3, the compressor 5, the second heat exchanger 6, and the expansion valve 7 are in operation; the PVT photovoltaic thermal component 1 and the fluorine pump 9 are not in operation; after being pressurized and heated by the compressor 5, the refrigerant becomes superheated steam and passes through the compressor outlet to the second heat exchanger 6, where it exchanges heat with water or other media to become a high-pressure supercooled refrigerant liquid. The high-pressure supercooled refrigerant solution enters the first heat exchanger 10 after isenthalpic pressure reduction through the expansion valve 7, and heat is exchanged between the refrigerant and the air entering the first heat exchanger 10 to become superheated refrigerant steam; the superheated low-pressure refrigerant steam coming out of the first heat exchanger 10 is mixed and sucked into the compressor 5, where it becomes superheated steam after being pressurized and heated by the compressor 5 to complete the cycle.

[0028] In the heat-increasing operation mode, the PVT photovoltaic thermal component 1, the four-way reversing valve 3, the compressor 5, the second heat exchanger 6, the expansion valve 7, and the first heat exchanger 10 are in operation, and the fluorine pump 9 is not in operation; after being pressurized and heated by the compressor 5, it becomes the refrigerant superheated steam and passes through the compressor outlet to the second heat exchanger 6, and exchanges heat with water or other media in the second heat exchanger 6 to become a high-pressure supercooled refrigerant liquid. The high-pressure supercooled refrigerant solution is divided into two branches after isenthalpic pressure reduction by the expansion valve 7, and enters the first heat exchanger 10 and the PVT photovoltaic thermal component respectively. 1 absorbs heat; the refrigerant entering the first heat exchanger 10 exchanges heat with the air and becomes superheated refrigerant vapor; the refrigerant absorbs heat through the PVT photovoltaic thermal module 1 and becomes superheated low-pressure refrigerant vapor, the superheated low-pressure refrigerant vapor from the first heat exchanger 10 and the PVT photovoltaic thermal module 1 is mixed and sucked into the compressor 5, and becomes refrigerant superheated vapor after being pressurized and heated by the compressor 5, completing the cycle, and the PVT photovoltaic thermal module 1 generates electricity, and the generated electricity can be supplied to electrical equipment directly or through an inverter.

[0029] In the preheating operation mode, the PVT photovoltaic thermal component 1, the second heat exchanger 6, and the fluorine pump 9 are in operation, and the first heat exchanger 10, the four-way reversing valve 3, the compressor 5, and the expansion valve 7 are not in operation; after the PVT photovoltaic thermal component 1 absorbs solar radiation, the PVT photovoltaic thermal component 1 generates electricity, and the generated electricity can be supplied to electrical equipment directly or through an inverter; the heat generated by the PVT photovoltaic thermal component 1 is absorbed by the refrigerant in the heat exchange mechanism behind it, and the refrigerant vapor after absorbing heat is transported to the second heat exchanger 6, and the refrigerant exchanges heat with water or other media in the second heat exchanger 6, and the water or other media in the second heat exchanger 6 is preheated, and the cooled refrigerant liquid is sent back to the PVT photovoltaic thermal component 1 by the fluorine pump 9 to absorb heat to cool the component, completing the cycle.

[0030] In the above embodiment, when the heat generation is greater than the user's heat load and cannot be stored, the excess heat is dissipated into the atmosphere through the fluorine pump and the first heat exchanger, thereby reducing the temperature of the PVT photovoltaic thermal component 1 and improving the power generation efficiency and power generation; when the heat generation cannot meet the user's heat load demand, part of the heat can be provided from the first heat exchanger to supplement the heat generation difference; different operating modes can be switched through automatic control to adapt to different outdoor meteorological conditions and buildings, and the unit has high flexibility.

[0031] In some embodiments, a first valve 31 and a second valve 32 are connected between the fourth interface of the four-way reversing valve 3 and the PVT photovoltaic thermal power generation component 1; a third valve 33 is connected between the end of the first valve 31 close to the second valve 32 and the first heat exchanger 10, a fourth valve 34 is connected between the end of the first valve 31 close to the second valve 32 and the second heat exchanger 6, a fifth valve 35 is connected between the second interface of the four-way reversing valve 3 and the second heat exchanger 6, a seventh valve 37 is connected between the expansion valve 7 and the liquid storage tank 8, a sixth valve 36 is connected in parallel to the expansion valve 7, an eighth valve 38 is connected between the first heat exchanger 10 and the seventh valve 37, a tenth valve 40 is connected between the fluorine pump 9 and the liquid storage tank 8, and a ninth valve 39 is connected in parallel to the fluorine pump 9 and the tenth valve 40; in the basic heating mode of the PVT heat pump, the first valve 31, the second valve 32, the fifth valve 35, the seventh valve 37, and the ninth valve 39 are opened, and the third valve 33, the fourth valve 3 4, the sixth valve 36, the eighth valve 38, and the tenth valve 40 are closed; in the heat dissipation operation mode, the first valve 31, the third valve 33, the seventh valve 37, the eighth valve 38, and the tenth valve 40 are opened, and the second valve 32, the fourth valve 34, the fifth valve 35, the sixth valve 36, and the ninth valve 39 are closed; in the air source heat pump operation mode, the second valve 32, the third valve 33, the fifth valve 35, and the eighth valve 38 are opened, and the first valve 31, the fourth valve 34, the sixth valve 36, the seventh valve 37, and the ninth valve 39 are closed. Valve 39 and the tenth valve 40 are closed; in the heating operation mode, the first valve 31, the second valve 32, the third valve 33, the fifth valve 35, the seventh valve 37, the eighth valve 38 and the ninth valve 39 are opened; the fourth valve 34, the sixth valve 36 and the tenth valve 40 are closed; in the preheating operation mode, the first valve 31, the fourth valve 34, the sixth valve 36, the seventh valve 37 and the ninth valve 39 are opened, and the second valve 32, the third valve 33, the fifth valve 35, the eighth valve 38 and the tenth valve 40 are closed.

[0032] In some embodiments, refrigerant pipes 11 are provided at both ends of the PVT photovoltaic thermal power generation component 1. The PVT photovoltaic thermal power generation component 1 realizes refrigerant circulation between the thermal unit body 2 through the refrigerant pipes 11. The refrigerant pipe 11 at one end of the PVT photovoltaic thermal power generation component 1 is connected to a first external interface valve 21, and the refrigerant pipe 11 at the other end of the PVT photovoltaic thermal power generation component 1 is connected to a second external interface valve 22; the first external interface valve 21 is connected to the first valve 31, and the second external interface valve 22 is respectively connected to the fluorine pump 9 and the ninth valve 39.

[0033] In some embodiments, the first heat exchanger 10 is an air heat exchanger, and a fan 101 is provided on the first heat exchanger 10; in the basic heating mode of the PVT heat pump, the heat dissipation operation mode, and the preheating operation mode, the fan 101 is turned off; in the air source heat pump operation mode and the heating operation mode, the fan 101 is on, and the fan 101 can enhance the heat exchange effect between the refrigerant and the air.

[0034] In some embodiments, a gas-liquid separation device 4 is provided between the first interface of the four-way reversing valve 3 and the compressor 5; the gas-liquid separation device 4 is a device for preventing the liquid refrigerant from directly entering the compressor 5. It is installed at the input end of the compressor 5. The gas-liquid separation device 4 retains the liquid entering its interior and allows the steam to pass through and enter the compressor 5 to prevent the compressor 5 from generating liquid hammer.

[0035] In some embodiments, a first check valve 51 is provided between the third interface of the four-way reversing valve 3 and the compressor 5 , and the first check valve 51 is used to prevent the backflow of superheated refrigerant vapor.

[0036] In some embodiments, the output end of the fluorine pump 9 is connected to a second check valve 39 , and the second check valve 39 is used to prevent the refrigerant liquid from flowing back.

[0037] In some embodiments, the second heat exchanger 6 is a container heat exchanger, a shell and tube heat exchanger, a plate heat exchanger or a coil heat exchanger; the first heat exchanger 10 is a fin coil heat exchanger.

[0038] In some embodiments, the second heat exchanger 6 is connected to a hot water storage tank 200; the second heat exchanger 6 has a first heat exchanger joint 23 and a second heat exchanger joint 24, the first heat exchanger joint 23 and the second heat exchanger joint 24 are both connected to the hot water storage tank 200 through a water pipe 202, and a water pump 201 is provided on the water pipe 202 between the second heat exchanger joint 24 and the hot water storage tank 200, and the water pump 201 is used to pump the water in the hot water storage tank 200 into the second heat exchanger 6; the water or other medium in the second heat exchanger 6 circulates through the heat exchanger interfaces 23 and 24, and is directly supplied to the building for use or stores the heat in the heat storage device after the temperature is increased.

[0039] In some embodiments, the number of the PVT photovoltaic thermal power generation components 1 is at least two, and the PVT photovoltaic thermal power generation components 1 are connected in series or in parallel.

[0040] In some embodiments, Figure 2 As shown, a flexible and efficient PVT heat pump unit is disclosed for use in schools. In the flexible and efficient PVT heat pump unit, a single PVT photovoltaic thermal power generation component 1 has a power generation capacity of 550W and adopts a 50m 3The heat storage tank 200 is used in a dormitory building of a middle school in a cold area; it operates in the basic heating mode of the PVT heat pump on weekdays during the semester, and in the heat dissipation mode on weekends or summer vacations; it operates in the air source heat pump mode on consecutive rainy days during the semester; during the summer vacation or weekends, when no one uses hot water, it operates in the heat dissipation mode, which can improve the power generation efficiency by 5.5%; when the number of people in the dormitory increases or the demand for domestic hot water increases, it operates in the air source heat pump mode at night, or in the heating mode at normal times, to meet the hot water demand of the dormitory.

[0041] So far, various embodiments of the present invention have been described in detail. In order to avoid obscuring the concept of the present invention, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed here.

[0042] The above-mentioned embodiments only express some implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the invention patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be based on the attached claims.

Claims

1. A flexible and efficient PVT heat pump unit, characterized by: Including PVT photovoltaic thermal power generation components and heat pump unit body; The heat pump unit body comprises a four-way reversing valve, an expansion valve, a liquid storage tank, a fluorine pump, a compressor, a first heat exchanger, and a second heat exchanger. A compressor is connected between the first interface and the third interface of the four-way reversing valve, a second heat exchanger is connected to the second interface of the four-way reversing valve, and the PVT photovoltaic thermal power generation component, the first heat exchanger and the second heat exchanger are connected to the fourth interface of the four-way reversing valve; One end of the liquid storage tank is connected to the first heat exchanger and the expansion valve, the expansion valve is connected to the second heat exchanger, and the other end of the liquid storage tank is connected to the fluorine pump and the PVT photovoltaic thermal power generation assembly; The second heat exchanger is connected to the liquid storage tank.

2. The flexible and efficient PVT heat pump unit according to claim 1, characterized in that: A first valve and a second valve are connected between the fourth interface of the four-way reversing valve and the PVT photovoltaic thermal power generation component; a third valve is connected between an end of the first valve close to the second valve and the first heat exchanger, a fourth valve is connected between an end of the first valve close to the second valve and the second heat exchanger, a fifth valve is connected between the second interface of the four-way reversing valve and the second heat exchanger, a seventh valve is connected between the expansion valve and the liquid storage tank, a sixth valve is connected in parallel to the expansion valve, an eighth valve is connected between the first heat exchanger and the seventh valve, a tenth valve is connected between the fluorine pump and the liquid storage tank, and a ninth valve is connected in parallel to the fluorine pump and the tenth valve.

3. The flexible and efficient PVT heat pump unit according to claim 2, characterized in that: Refrigerant pipelines are provided at both ends of the PVT photovoltaic thermal power generation component. The refrigerant pipeline at one end of the PVT photovoltaic thermal power generation component is connected to a first external interface valve, and the refrigerant pipeline at the other end of the PVT photovoltaic thermal power generation component is connected to a second external interface valve; the first external interface valve is connected to the first valve, and the second external interface valve is respectively connected to the fluorine pump and the ninth valve.

4. The flexible and efficient PVT heat pump unit according to claim 1, characterized in that: The first heat exchanger is an air heat exchanger, and a fan is provided on the first heat exchanger.

5. The flexible and efficient PVT heat pump unit according to claim 1, characterized in that: A gas-liquid separation device is provided between the first interface of the four-way reversing valve and the compressor.

6. The flexible and efficient PVT heat pump unit according to claim 1, characterized in that: A first check valve is arranged between the third interface of the four-way reversing valve and the compressor.

7. The flexible and efficient PVT heat pump unit according to claim 1, characterized in that: The output end of the fluorine pump is connected with a second check valve.

8. The flexible and efficient PVT heat pump unit according to claim 1, characterized in that: The second heat exchanger is a container heat exchanger, a shell and tube heat exchanger, a plate heat exchanger or a coil heat exchanger; the first heat exchanger is a fin coil heat exchanger.

9. The flexible and efficient PVT heat pump unit according to claim 1, characterized in that: The second heat exchanger is connected to a hot water storage tank; the second heat exchanger has a first heat exchanger joint and a second heat exchanger joint, the first heat exchanger joint and the second heat exchanger joint are both connected to the hot water storage tank through a water pipe, and a water pump is provided on the water pipe between the second heat exchanger joint and the hot water storage tank, and the water pump is used to pump water in the hot water storage tank into the second heat exchanger.

10. The flexible and efficient PVT heat pump unit according to claim 1, characterized in that: The number of the PVT photovoltaic thermal power generation components is at least two, and the PVT photovoltaic thermal power generation components are connected in series or in parallel.

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