Double-source heat pump system

Abstract

According to the double-source heat pump system, intelligent compensation is conducted through external energy, the energy is utilized to the maximum extent, the commercial power input proportion of a heat pump is reduced, and the economic cost is saved. The inverter compressor assembly comprises an inverter compressor, a four-way valve, a gas-liquid separator, a high-voltage switch and a low-voltage switch; the water side heat exchanger comprises a water pipe and a heat exchange pipe assembly, the water pipe is provided with a heating water inlet end and a heating water outlet end, the heat exchange pipe assembly is located in an inner cavity of the water pipe, and the heat exchange pipe assembly comprises a medium inlet and a medium outlet; a liquid reservoir; the two groups of electronic expansion valves comprise a first electronic expansion valve and a second electronic expansion valve; the fin type heat exchanger comprises a fin coil pipe and a fan assembly; and the plate heat exchanger comprises a refrigerant heat exchange channel and an external heat exchange water channel.

Description

Technical Field

[0001] The present invention relates to the technical field of heat pump systems, and in particular to a dual-source heat pump system. Background Art

[0002] Existing heat pump systems generally use single-electricity or single-water source heat pump technology. With the diversification of energy forms, heat pumps that only use electricity as their energy source have gradually been unable to adapt to the development of modern heat pump systems. For this reason, it is urgent to develop a dual-source heat pump system so that users can choose different energy sources, thereby expanding the way energy is used. Summary of the invention

[0003] In view of the above problems, the present invention provides a dual-source heat pump system, which performs intelligent compensation through external energy, maximizes energy utilization, reduces the proportion of AC power input used by the heat pump, and saves economic costs.

[0004] A dual-source heat pump system, characterized in that it comprises:

[0005] A variable frequency compressor assembly, comprising a variable frequency compressor, a four-way valve, a gas-liquid separator, a high-pressure switch, and a low-pressure switch, wherein the four-way valve comprises a C port, a D port, an E port, and an S port, wherein the exhaust end of the variable frequency compressor is connected to the high-pressure switch and then to the D port, and the suction end of the variable frequency compressor is connected to the low-pressure switch and then to the connecting pipeline of the gas-liquid separator and then to the S port of the four-way valve;

[0006] A water-side heat exchanger, comprising a water pipe and a heat exchange tube assembly, wherein the water pipe is provided with a heating water inlet end and a heating water outlet end, the heat exchange tube assembly is located in the inner cavity of the water pipe, and the heat exchange tube assembly comprises a medium inlet and a medium outlet;

[0007] Liquid reservoir;

[0008] Two sets of electronic expansion valves, including a first electronic expansion valve and a second electronic expansion valve;

[0009] A fin heat exchanger, comprising a fin coil and a fan assembly;

[0010] and a plate heat exchanger comprising a refrigerant heat exchange channel and an external water exchange water channel;

[0011] The C port of the four-way valve is connected to the medium inlet of the water-side heat exchanger through a pipeline, and the medium outlet is connected to the inlet of the liquid accumulator through a pipeline. The outlet of the liquid accumulator is connected in parallel with the corresponding ends of the first electronic expansion valve and the second electronic expansion valve. The other end of the first electronic expansion valve is respectively connected in parallel with the second refrigerant solenoid valve and one end of the third refrigerant solenoid valve through pipelines. The other end of the third refrigerant solenoid valve is connected to the E port of the four-way valve and a port of the refrigerant heat exchange channel of the plate heat exchanger through a three-way valve. The other end of the second refrigerant solenoid valve is connected to the other port of the refrigerant heat exchange channel of the plate heat exchanger. The second electronic expansion valve is connected to the medium inlet of the fin coil. The medium outlet of the fin coil is connected to the first refrigerant solenoid valve and then connected to the other end of the first electronic expansion valve and one end of the second refrigerant solenoid valve through a three-way valve.

[0012] The external water exchange water channel is used for heating the second group of water channels;

[0013] The variable frequency compressor is connected to the mains and the second power source. When the power of the second power source meets the working conditions of the variable frequency compressor, it is switched to the second power source for power supply. When the power of the second power source is insufficient, it is switched to the mains or the mains and the second power source for power supply.

[0014] The external water exchange channel of the plate heat exchanger is used to connect hot water obtained by various new energy comprehensive source utilization technologies such as solar energy, air energy, water source, ground source, sewage source, seawater source, industrial waste heat, industrial waste heat, and photovoltaic thermal PVT components.

[0015] It is further characterized by:

[0016] The variable frequency compressor is a DC variable frequency compressor, the second power source is a photovoltaic thermal PVT component, the power output end of the photovoltaic thermal PVT component is connected to one of the power input ends of the DC variable frequency compressor, the power output of the photovoltaic thermal PVT component is direct current, the photovoltaic thermal PVT component has a built-in photovoltaic control module that adjusts voltage and current in real time, and uses photovoltaic direct current to drive the DC variable frequency compressor through photovoltaic direct drive technology;

[0017] It also includes an insulated water tank, which is provided with two groups of inlet and outlet water pipe assemblies, specifically a first inlet and outlet water pipe assembly and a second inlet and outlet water pipe assembly. The first inlet and outlet water pipe assembly corresponds to the photothermal pipeline of the photovoltaic photothermal PVT assembly and the external water exchange water channel arrangement of the plate heat exchanger, and the second inlet and outlet water pipe assembly corresponds to the water pipe corresponding port arrangement of the water side heat exchanger;

[0018] The first inlet and outlet water pipe assembly includes a first input pipe and a first output pipe, the hot water output end of the photovoltaic thermal PVT assembly is connected to the first end of the first three-way valve through a PVT circulation pump, the second end of the first three-way valve is connected to the first input pipe, the third end of the first three-way valve is connected to the hot water outlet end of the external water exchange channel, the first output pipe of the thermal insulation water tank is connected to the second end of the second three-way valve, the first end of the second three-way valve is connected to the cold water input end of the photovoltaic thermal PVT assembly, and the third end of the second three-way valve is connected to the cold water inlet end of the external water exchange channel of the plate heat exchanger;

[0019] The second inlet and outlet water pipe assembly includes a second input pipe and a second output pipe, the heating water outlet end of the water side heat exchanger is connected to the second input pipe through a water pump, and the second output pipe is connected to the heating water inlet end of the water side heat exchanger through a pipeline;

[0020] The fan assembly is arranged according to the transverse length of the fin coil, and the airflow fanning area of ​​the fan assembly covers the transverse length of the fin coil.

[0021] After adopting the structure of the present invention, the variable frequency compressor in the dual-source heat pump system is connected to the mains and the second power source. When the power of the second power source meets the working conditions of the variable frequency compressor, it is switched to the second power source for power supply. When the power of the second power source is insufficient, it is switched to the mains power supply or the mains and the second power source for power supply. The external water exchange water channel of the plate heat exchanger is used to connect the hot water obtained by various new energy comprehensive source utilization technologies such as solar energy, air energy, water source, ground source, sewage source, seawater source, industrial waste heat, industrial waste heat, and photovoltaic thermal PVT components. It performs intelligent compensation through external energy to maximize the utilization of energy, reduce the proportion of mains input for the heat pump, and save economic costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the present invention;

[0023] Figure 2 It is a schematic structural diagram of a specific embodiment of the present invention;

[0024] The names corresponding to the serial numbers in the figure are as follows:

[0025] First input pipe 1, first output pipe 2, second input pipe 3, second output pipe 4, PVT circulation pump 5, first three-way valve 6, second three-way valve 7, water pump 8;

[0026] Variable frequency compressor assembly 10, variable frequency compressor 11, four-way valve 12, gas-liquid separator 13, high pressure switch 14, low pressure switch 15, water side heat exchanger 20, water pipe 21, heating water inlet 211, heating water outlet 212, heat exchange tube assembly 22, medium inlet 221, medium outlet 222, liquid storage tank 30, electronic expansion valve 40, first electronic expansion valve 41, second electronic expansion valve 42, refrigeration solenoid valve 50, first refrigerant solenoid valve 51, second refrigerant solenoid valve 52, third refrigerant solenoid valve 53, fin heat exchanger 60, fin coil 61, fan assembly 62, plate heat exchanger 70, refrigerant heat exchange channel 71, external water exchange water channel 72, cold water inlet 721, hot water outlet 722, second power source 80, mains 90, air source heat pump 100, photovoltaic thermal PVT assembly 110, and insulation water tank 120. DETAILED DESCRIPTION

[0027] A dual-source heat pump system, see Figure 1 , Figure 2 , which includes a variable frequency compressor assembly 10, a water side heat exchanger 20, a liquid storage tank 30, two sets of electronic expansion valves 40, a fin heat exchanger 60, a plate heat exchanger 70, and three sets of refrigeration solenoid valves 50;

[0028] The variable frequency compressor assembly 10 includes a variable frequency compressor 11, a four-way valve 12, a gas-liquid separator 13, a high-pressure switch 14, and a low-pressure switch 15. The four-way valve 12 includes a C port, a D port, an E port, and an S port. The exhaust end of the variable frequency compressor 11 is connected to the high-pressure switch 14 and then to the D port. The suction end of the variable frequency compressor 11 is connected to the low-pressure switch 15 and then to the connecting pipeline of the gas-liquid separator 13 and then to the S port of the four-way valve 12.

[0029] The water-side heat exchanger 20 includes a water pipe 21 and a heat exchange tube assembly 22. The water pipe 21 is provided with a heating water inlet 211 and a heating water outlet 212. The heat exchange tube assembly 22 is located in the inner cavity of the water pipe 21. The heat exchange tube assembly 22 includes a medium inlet 221 and a medium outlet 222.

[0030] The two sets of electronic expansion valves 40 include a first electronic expansion valve 41 and a second electronic expansion valve 42;

[0031] The fin heat exchanger 60 includes a fin coil 61 and a fan assembly 62;

[0032] The plate heat exchanger 70 includes a refrigerant heat exchange channel 71 and an external water exchange water channel 72;

[0033] The three groups of refrigeration solenoid valves 50 include a first refrigerant solenoid valve 51, a second refrigerant solenoid valve 52, and a third refrigerant solenoid valve 53;

[0034] The C port of the four-way valve 12 is connected to the medium inlet 221 of the water side heat exchanger 20 through a pipeline, and the medium outlet 222 is connected to the inlet of the liquid accumulator 30 through a pipeline. The outlet of the liquid accumulator 30 is connected in parallel with the corresponding ends of the first electronic expansion valve 41 and the second electronic expansion valve 42. The other end of the first electronic expansion valve 41 is connected in parallel with the second refrigerant solenoid valve 52 and one end of the third refrigerant solenoid valve 53 through pipelines. The other end of the third refrigerant solenoid valve 53 is connected to the E port of the four-way valve 12 and one end of the refrigerant heat exchange channel 71 of the plate heat exchanger 70 through a three-way valve. The other end of the second refrigerant solenoid valve 52 is connected to the other end of the refrigerant heat exchange channel 71 of the plate heat exchanger 70. The second electronic expansion valve 42 is connected to the medium inlet of the fin coil 61. The medium outlet of the fin coil 61 is connected to the first refrigerant solenoid valve 51 and then connected to the other end of the first electronic expansion valve 41 and one end of the second refrigerant solenoid valve 52 through a three-way valve.

[0035] The external water exchange water channel 72 is used for heating the second group of water channels;

[0036] The variable frequency compressor 11 is connected to the mains 90 and the second power source 80. When the power of the second power source 80 meets the working conditions of the variable frequency compressor 11, it is switched to the second power source 80 for power supply. When the power of the second power source 80 is insufficient, it is switched to the mains 90 for power supply or the mains 90 and the second power source 80 for power supply in coordination.

[0037] The external water exchange channel 72 of the plate heat exchanger 70 is used to connect hot water obtained from various new energy comprehensive source utilization technologies such as solar energy, air energy, water source, ground source, sewage source, seawater source, industrial waste heat, industrial waste heat, and photovoltaic thermal PVT components.

[0038] In a specific implementation, the combination of the variable frequency compressor assembly 10 , the water side heat exchanger 20 , the liquid storage tank 30 , the two sets of electronic expansion valves 40 , and the fin heat exchanger 60 is equivalent to an air source heat pump 100 .

[0039] The variable frequency compressor 11 is a DC variable frequency compressor, the second power source 80 is a photovoltaic thermal PVT assembly 110, the power output end of the photovoltaic thermal PVT assembly 110 is connected to one of the power input ends of the DC variable frequency compressor, the power output by the photovoltaic thermal PVT assembly 110 is direct current, the photovoltaic thermal PVT assembly 110 has a built-in photovoltaic control module that adjusts the voltage and current in real time, and uses photovoltaic direct current to drive the DC variable frequency compressor through photovoltaic direct drive technology;

[0040] It also includes an insulated water tank 120, which is provided with two groups of inlet and outlet water pipe assemblies, specifically a first inlet and outlet water pipe assembly and a second inlet and outlet water pipe assembly. The first inlet and outlet water pipe assembly corresponds to the photothermal pipeline of the photovoltaic photothermal PVT assembly 110 and the external water exchange water channel 72 of the plate heat exchanger 70, and the second inlet and outlet water pipe assembly corresponds to the corresponding port of the water pipe 21 of the water side heat exchanger 20;

[0041] The first inlet and outlet water pipe assembly includes a first input pipe 1 and a first output pipe 2, the second inlet and outlet water pipe assembly includes a second input pipe 3 and a second output pipe 4, the hot water output end of the photovoltaic thermal PVT assembly 110 is connected to the first end of the first three-way valve 6 through the PVT circulation pump 5, the second end of the first three-way valve 6 is connected to the first input pipe 1, the third end of the first three-way valve 6 is connected to the hot water outlet end 722 of the external hot water exchange channel 72, the first output pipe 2 of the thermal insulation water tank 120 is connected to the second end of the second three-way valve 7, the first end of the second three-way valve 7 is connected to the cold water input end of the photovoltaic thermal PVT assembly 110, and the third end of the second three-way valve 7 is connected to the cold water inlet end 721 of the external hot water exchange channel 72 of the plate heat exchanger 70;

[0042] The heating water outlet 212 of the water side heat exchanger 20 is connected to the second input pipe 4 through the water pump 8, and the second output pipe 4 is connected to the heating water inlet 211 of the water side heat exchanger 20 through a pipeline;

[0043] The fan assembly 62 is arranged according to the transverse length of the fin coil 61 , and the airflow fanning area of ​​the fan assembly 62 covers the transverse length of the fin coil 61 . In a specific embodiment, the fan assembly 62 includes two groups of fans.

[0044] In specific implementation, the refrigerant can also be replaced by a coolant+water, and preferably the coolant is ethylene glycol.

[0045] The whole system includes the following working modes, and the flow direction of the refrigerant in the following modes is:

[0046] Heating mode cycle 1 (no-sun operation mode): variable frequency heat pump compressor → four-way reversing valve S port → four-way reversing valve C port → water side heat exchanger → liquid receiver → second electronic expansion valve → refrigerant first solenoid valve → refrigerant third solenoid valve → four-way reversing valve E port → four-way reversing valve D port → variable frequency heat pump compressor;

[0047] Heating mode cycle 2 (sun operation mode): variable frequency heat pump compressor → four-way reversing valve S port → four-way reversing valve C port → water side heat exchanger → liquid receiver → first electronic expansion valve → refrigerant second solenoid valve → plate heat exchanger → four-way reversing valve E port → four-way reversing valve D port → variable frequency heat pump compressor;

[0048] Heating mode cycle 3 (rainy day operation mode): variable frequency heat pump compressor-four-way reversing valve S port → four-way reversing valve C port → water side heat exchanger → liquid receiver → second electronic expansion valve-fin heat exchanger → refrigerant first solenoid valve → refrigerant second solenoid valve → plate heat exchanger → four-way reversing valve E port → four-way reversing valve D port → variable frequency heat pump compressor.

[0049] In heating cycle modes 2 and 3, the reverse Carnot cycle is performed by extracting heat from the photovoltaic thermal (PVT) components in the multi-energy source. The reverse Carnot cycle consists of a compression process, a condensation process, an expansion process, and an evaporation process. The limited refrigerant is used in a closed heating system to repeatedly compress, condense, expand, and evaporate the refrigerant, continuously absorbing heat and vaporizing at the evaporator to increase or decrease the temperature.

[0050] When the photovoltaic thermal PVT component is added, the entire heat pump system also has a photovoltaic direct-drive direct heating mode cycle. At this time, the first three-way valve and the second three-way valve are electric three-way valves, the first end and the second end of the first three-way valve are in a passage state, and the first end and the second end of the second three-way valve are in a passage state. The relatively cold water in the insulated water tank flows from the first output pipe along the second three-way valve into the cold water input end of the photovoltaic thermal PVT component. After that, the water heated by the photovoltaic thermal PVT component is pumped from the hot water output end through the PVT circulation pump through the first output pipe into the insulated water tank, and circulates in sequence.

[0051] Therefore, the dual-source heat pump system not only includes its own heating mode cycle 1, heating mode cycle 2, and heating mode cycle 3, but is also compatible with the operation function of the photovoltaic direct drive direct heating mode. At this time, the power output end of the photovoltaic thermal PVT component serves as the second power source to directly power the DC variable frequency compressor.

[0052] The main technical problem solved by the dual-source heat pump system with photovoltaic (PVT) components is to develop and use heat transfer media to ensure the basic stability of the temperature and power generation efficiency of solar panels, greatly improve the battery efficiency and the utilization rate of low-temperature heat, achieve a high overall efficiency, and ensure the self-operation of the system without external power supply. By using new heat transfer optimization technologies, increasing the heat exchange area, forcing the fluid to flow, strengthening radiation, convection and heat conduction, and coordinating multiple heat exchange methods, it can not only reduce the temperature of the panels, strengthen the heat dissipation effect of photovoltaic panels, and improve power generation efficiency, but also realize the use of solar thermal energy to provide hot water for users;

[0053] The dual-source heat pump system with photovoltaic (PVT) components mainly utilizes photovoltaic cells, flat-plate collectors, and air-source heat pump technologies to achieve high comprehensive efficiency; enhances the heat transfer effect between the cell and the flat-plate collector, reduces the temperature of the cell panel, delays the aging of the cell panel, and increases the service life of the collector; overcomes the problem that when the photothermal and photovoltaic collectors operate independently, the photothermal and photovoltaic collectors each occupy their own collection area, resulting in a small combined footprint; realizes the cogeneration function of a photovoltaic direct-drive (PVT) dual-source heat pump system, and part of the self-generated electricity can be directly used to drive the photothermal system air-source heat pump or circulating water pump through battery storage, reducing the consumption of conventional energy;

[0054] The dual-source heat pump system with photovoltaic (PVT) components perfectly combines the unique photovoltaic direct drive technology with the efficient DC variable frequency heat pump compressor. The key to this technological innovation is that the essential AC-DC conversion process in the traditional photovoltaic power generation system is omitted. The DC power generated by the photovoltaic panel directly drives the compressor, and the series boost technology is used to achieve efficient use of electrical energy.

[0055] The dual-source heat pump system has two power input ports: mains power and DC photovoltaic power. The mains power is responsible for the operation of auxiliary equipment such as fans and water pumps, and provides supplementary power for the compressor when the sunlight is insufficient. Photovoltaic power generation is mainly responsible for the power supply of the DC variable frequency compressor. It has automatic compensation technology for dual power input and intelligent switching of mains power. When the sunlight is sufficient, the proportion of mains power input can be reduced to an extremely low level, such as only 5% at noon, thereby achieving an excellent energy saving effect of up to 95%. When the sunlight weakens, the proportion of mains power input will gradually increase to ensure the stable operation of the equipment around the clock.

[0056] The advantage of a dual-source heat pump system with photovoltaic (PVT) components is that photovoltaic direct drive technology uses photovoltaic direct current to drive a high-efficiency DC variable-frequency heat pump compressor, a built-in photovoltaic control module to adjust voltage and current in real time, no inverter and low cost, dual power input intelligent compensation, and maximum utilization of photovoltaic power characteristics.

[0057] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0058] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A dual-source heat pump system, characterized in that: It includes: A variable frequency compressor assembly, comprising a variable frequency compressor, a four-way valve, a gas-liquid separator, a high-pressure switch, and a low-pressure switch, wherein the four-way valve comprises a C port, a D port, an E port, and an S port, wherein the exhaust end of the variable frequency compressor is connected to the high-pressure switch and then to the D port, and the suction end of the variable frequency compressor is connected to the low-pressure switch and then to the connecting pipeline of the gas-liquid separator and then to the S port of the four-way valve; A water-side heat exchanger, comprising a water pipe and a heat exchange tube assembly, wherein the water pipe is provided with a heating water inlet end and a heating water outlet end, the heat exchange tube assembly is located in the inner cavity of the water pipe, and the heat exchange tube assembly comprises a medium inlet and a medium outlet; Liquid reservoir; Two sets of electronic expansion valves, including a first electronic expansion valve and a second electronic expansion valve; A fin heat exchanger, comprising a fin coil and a fan assembly; and a plate heat exchanger comprising a refrigerant heat exchange channel and an external water exchange water channel; The C port of the four-way valve is connected to the medium inlet of the water-side heat exchanger through a pipeline, and the medium outlet is connected to the inlet of the liquid accumulator through a pipeline. The outlet of the liquid accumulator is connected in parallel with the corresponding ends of the first electronic expansion valve and the second electronic expansion valve. The other end of the first electronic expansion valve is respectively connected in parallel with the second refrigerant solenoid valve and one end of the third refrigerant solenoid valve through pipelines. The other end of the third refrigerant solenoid valve is connected to the E port of the four-way valve and a port of the refrigerant heat exchange channel of the plate heat exchanger through a three-way valve. The other end of the second refrigerant solenoid valve is connected to the other port of the refrigerant heat exchange channel of the plate heat exchanger. The second electronic expansion valve is connected to the medium inlet of the fin coil. The medium outlet of the fin coil is connected to the first refrigerant solenoid valve and then connected to the other end of the first electronic expansion valve and one end of the second refrigerant solenoid valve through a three-way valve. The external water exchange water channel is used for heating the second group of water channels; The variable frequency compressor is connected to the mains and the second power source. When the power of the second power source meets the working conditions of the variable frequency compressor, it is switched to the second power source for power supply. When the power of the second power source is insufficient, it is switched to the mains or the mains and the second power source for power supply. The external water exchange channel of the plate heat exchanger is used to connect hot water obtained by various new energy comprehensive source utilization technologies such as solar energy, air energy, water source, ground source, sewage source, seawater source, industrial waste heat, industrial waste heat, and photovoltaic thermal PVT components.

2. A dual-source heat pump system according to claim 1, characterized in that: The variable frequency compressor is a DC variable frequency compressor, the second power source is a photovoltaic thermal PVT component, the power output end of the photovoltaic thermal PVT component is connected to one of the power input ends of the DC variable frequency compressor, the power output of the photovoltaic thermal PVT component is direct current, the photovoltaic thermal PVT component has a built-in photovoltaic control module to adjust the voltage and current in real time, and uses photovoltaic direct current to drive the DC variable frequency compressor through photovoltaic direct drive technology.

3. A dual-source heat pump system according to claim 2, characterized in that: It also includes an insulated water tank, which is provided with two groups of inlet and outlet water pipe assemblies, specifically a first inlet and outlet water pipe assembly and a second inlet and outlet water pipe assembly. The first inlet and outlet water pipe assembly corresponds to the photothermal pipeline of the photovoltaic thermal (PVT) assembly and the external water exchange water channel arrangement of the plate heat exchanger, and the second inlet and outlet water pipe assembly corresponds to the corresponding port setting of the water pipe of the water side heat exchanger.

4. A dual-source heat pump system according to claim 3, characterized in that: The first inlet and outlet water pipe assembly includes a first input pipe and a first output pipe. The hot water output end of the photovoltaic thermal PVT assembly is connected to the first end of the first three-way valve through a PVT circulation pump, the second end of the first three-way valve is connected to the first input pipe, and the third end of the first three-way valve is connected to the hot water outlet end of the external water exchange channel. The first output pipe of the insulated water tank is connected to the second end of the second three-way valve, the first end of the second three-way valve is connected to the cold water input end of the photovoltaic thermal PVT assembly, and the third end of the second three-way valve is connected to the cold water inlet end of the external water exchange channel of the plate heat exchanger.

5. A dual-source heat pump system according to claim 3, characterized in that: The second inlet and outlet water pipe assembly includes a second input pipe and a second output pipe. The heating water outlet end of the water side heat exchanger is connected to the second input pipe through a water pump, and the second output pipe is connected to the heating water inlet end of the water side heat exchanger through a pipeline.

6. A dual-source heat pump system according to claim 1, characterized in that: The fan assembly is arranged according to the transverse length of the fin coil, and the airflow fanning area of ​​the fan assembly covers the transverse length of the fin coil.

Images