Dehumidification heat exchanger coupling PVT double-source heat pump combined heat and power generation system and operation method thereof

Abstract

The invention provides a combined heat and power generation system with a dehumidification heat exchanger coupled with a PVT double-source heat pump and an operation method of the combined heat and power generation system. Comprising a PVT heating system, a low-pressure series heating system, a dehumidification heat exchanger heating system, a dehumidification system or a regeneration system, wherein the PVT heating system is formed by connecting any one of a PVT heat collector / evaporator, a gas-liquid separator, a compressor, a heat storage water tank, an electronic expansion valve or a dehumidification heat exchanger; by controlling starting and stopping of a compressor, the opening degree of an electronic expansion valve, opening and closing of an electromagnetic valve, reversing of a three-way air valve and starting and stopping of a fan in the heat pump system, annual combined heat and power generation can be achieved, the requirements for winter heating, annual electricity utilization and domestic hot water of a building are met, and heat needed in the regeneration stage of a solid adsorption material of a dehumidification heat exchanger is provided through waste heat of a PVT double-source heat pump; and indoor wet load treatment in a high-humidity area is realized.

Description

Technical Field

[0001] The present invention relates to the fields of solar photovoltaic and thermal cogeneration technology and dehumidification technology, and in particular to a dehumidification heat exchanger coupled PVT dual-source heat pump cogeneration system. Background Art

[0002] With the advancement of industrial technology and the increase in energy consumption, and the transformation of energy systems from fossil energy to renewable energy, it is urgent to develop efficient renewable energy technology.

[0003] Solar photovoltaic thermal (PVT) cogeneration technology is a technology that uses solar cells and solar collectors to convert solar energy into electrical energy and / or thermal energy. The technology is environmentally friendly and has good economic efficiency. This technology can be divided into direct evaporation PVT heat pump system and indirect PVT heat pump system according to the circulating working fluid. Compared with the indirect PVT heat pump system, the direct evaporation PVT heat pump cogeneration system has no intermediate heat exchange process, directly uses the heat pump working fluid as the circulating working fluid, and uses the integrated PVT component as the evaporator of the heat pump cycle. At the same time, the solar cell realizes photoelectric conversion through the photovoltaic effect, and the heat pump working fluid in the backplane can absorb the unused heat of the solar cell, so that the solar cell maintains efficient operation and realizes efficient cogeneration.

[0004] The existing patent document with publication number CN110296544A discloses a dual-source composite heat pump system based on a PVT component. The dual-source composite heat pump system based on PVT includes a first heat source heat pump subsystem and a second heat source heat pump subsystem, the first heat source heat pump subsystem and the second heat source heat pump subsystem are thermally coupled through a second heat source heat exchanger, so that the first refrigerant in the first heat source heat pump subsystem can exchange heat with the second refrigerant in the second heat source heat pump subsystem, the second heat source heat pump subsystem includes a PVT component and an energy storage device, the PVT component has a third refrigerant, the energy storage device has an energy storage phase change material, the PVT component is thermally coupled to the energy storage phase change material through the third refrigerant, and the second heat source heat exchanger is thermally coupled to the energy storage phase change material through the water therein.

[0005] Although the existing system uses a dual-source compound heat pump, its integration is not high, there are not many operating modes, and it cannot achieve a high dehumidification efficiency and comprehensive utilization rate of solar energy. Summary of the invention

[0006] In view of the defects in the prior art, an object of the present invention is to provide a dehumidification heat exchanger coupled PVT dual-source heat pump cogeneration system and an operation method thereof.

[0007] A dehumidification heat exchanger coupled PVT dual-source heat pump cogeneration system provided by the present invention comprises a PVT heat collector / evaporator, a gas-liquid separator, a compressor, a hot water storage tank, an electronic expansion valve or a dehumidification heat exchanger connected to form a PVT heating system, a low-pressure series heating system, a dehumidification heat exchanger heating system, a dehumidification system or a regeneration system.

[0008] Preferably, in the PVT heating system, the outlet end of the PVT collector / evaporator is connected to the gas-liquid separator through the first tee, the first solenoid valve and the second tee in sequence, the gas-liquid separator is connected to the compressor, the compressor is connected to the hot water storage tank through the third tee and the fourth solenoid valve in sequence, the hot water storage tank is connected to the electronic expansion valve through the sixth tee, and the electronic expansion valve is connected to the inlet end of the PVT collector / evaporator through the seventh tee, forming a cycle.

[0009] Preferably, in the low-pressure series heating system, the outlet end of the PVT collector / evaporator is connected to the inlet end of the dehumidification heat exchanger through the first tee, the fifth solenoid valve, the eighth tee, and the fifth tee in sequence, the outlet end of the dehumidification heat exchanger is connected to the gas-liquid separator through the fourth tee, the second solenoid valve, and the second tee in sequence, the gas-liquid separator is connected to the compressor, the compressor is connected to the hot water tank through the third tee and the fourth solenoid valve in sequence, the hot water tank is connected to the electronic expansion valve through the sixth tee, and the electronic expansion valve is connected to the inlet end of the PVT collector / evaporator through the seventh tee, forming a cycle.

[0010] Preferably, in the dehumidification heat exchanger heating system, the outlet end of the dehumidification heat exchanger is connected to the gas-liquid separator through the fourth three-way, the second solenoid valve, and the second three-way in sequence, the gas-liquid separator is connected to the compressor, the compressor is connected to the hot water storage tank through the third three-way and the fourth solenoid valve in sequence, the hot water storage tank is connected to the electronic expansion valve through the sixth three-way, the electronic expansion valve is connected to the inlet end of the dehumidification heat exchanger through the seventh three-way, the sixth solenoid valve, the eighth three-way, and the fifth three-way in sequence, forming a cycle.

[0011] Preferably, in the dehumidification system, the PVT heat collector / evaporator is connected in parallel with the dehumidification heat exchanger, the inlet end of the PVT heat collector / evaporator is connected to the inlet end of the dehumidification heat exchanger through the seventh three-way, the sixth solenoid valve, the eighth three-way, and the fifth three-way in sequence, and the outlet end of the PVT heat collector / evaporator is connected to the outlet end of the dehumidification heat exchanger through the first three-way, the first solenoid valve, the second three-way, the second solenoid valve, and the fourth three-way in sequence;

[0012] The second three-way connection is connected to the gas-liquid separator, the gas-liquid separator is connected to the compressor, the compressor is connected to the hot water storage tank through the third three-way connection and the fourth solenoid valve in sequence, the hot water storage tank is connected to the electronic expansion valve through the sixth three-way connection, and the electronic expansion valve is connected to the seventh three-way connection.

[0013] Preferably, in the regeneration system, the outlet end of the PVT collector / evaporator is connected to the gas-liquid separator through the first tee, the first solenoid valve and the second tee in sequence, the gas-liquid separator is connected to the compressor, the compressor is connected to the outlet end of the dehumidification heat exchanger through the third tee, the third solenoid valve and the fourth tee in sequence, the inlet end of the dehumidification heat exchanger is connected to the electronic expansion valve through the fifth tee, the seventh solenoid valve and the sixth tee in sequence, the electronic expansion valve is connected to the inlet end of the PVT collector / evaporator through the seventh tee, forming a cycle.

[0014] The present invention also provides an operation method of a dehumidification heat exchanger coupled PVT dual-source heat pump cogeneration system, including a PVT heating mode, a low-pressure series heating mode, a dehumidification heat exchanger heating mode, a dehumidification mode or a regeneration mode formed by connecting any several of a PVT collector / evaporator, a gas-liquid separator, a compressor, a hot water storage tank, an electronic expansion valve or a dehumidification heat exchanger.

[0015] Preferably, in the PVT heating mode, the PVT heat collector / evaporator operates as an evaporator, and after the heat pump working fluid evaporates in the PVT heat collector / evaporator, it enters the gas-liquid separator through the first three-way, the first solenoid valve, and the second three-way in sequence, and then is compressed to a high-temperature and high-pressure state by the compressor, and then enters the hot water storage tank through the third three-way and the fourth solenoid valve in sequence, and after heat exchange with water in the hot water storage tank, enters the electronic expansion valve through the sixth three-way and is throttled to a low-temperature and low-pressure state, and then enters the PVT heat collector / evaporator through the seventh three-way, forming a cycle;

[0016] In the low-pressure series heating mode, the PVT heat collector / evaporator and the dehumidification heat exchanger are connected in series and both operate as evaporators. After the heat pump working fluid evaporates in the PVT heat collector / evaporator, it enters the dehumidification heat exchanger through the first three-way, the fifth solenoid valve, the eighth three-way, and the fifth three-way in sequence. After evaporating in the dehumidification heat exchanger, it enters the gas-liquid separator through the fourth three-way, the second solenoid valve, and the second three-way in sequence. After being compressed in the compressor, it enters the hot water storage tank through the third three-way and the fourth solenoid valve in sequence. After exchanging heat with water in the hot water storage tank, it enters the electronic expansion valve through the sixth three-way and is throttled to a low temperature and low pressure state, and then enters the PVT heat collector / evaporator through the seventh three-way, forming a cycle.

[0017] The outdoor air flows in from the first air duct and sequentially passes through the fan, the third air duct, the dehumidification heat exchanger to the fourth air duct and flows into the outdoors.

[0018] Preferably, in the dehumidification mode, the PVT heat collector / evaporator is connected in parallel with the dehumidification heat exchanger and operates as an evaporator at the same time, the inlet end of the PVT heat collector / evaporator is connected to the inlet end of the dehumidification heat exchanger through the seventh three-way, the sixth solenoid valve, the eighth three-way, and the fifth three-way in sequence, and the outlet end of the PVT heat collector / evaporator is connected to the outlet end of the dehumidification heat exchanger through the first three-way, the first solenoid valve, the second three-way, the second solenoid valve, and the fourth three-way in sequence;

[0019] The heat pump working fluid is divided into two fluid paths at the seventh tee, and the two fluid paths include a first fluid and a second fluid, wherein the first fluid enters the PVT heat collector / evaporator, and after evaporating in the PVT heat collector / evaporator, the first fluid passes through the first tee and the first solenoid valve in sequence, and merges with the second fluid at the second tee; the second fluid passes through the sixth solenoid valve, the eighth tee, and the fifth tee in sequence to enter the dehumidification heat exchanger, and after evaporating in the dehumidification heat exchanger, the second fluid passes through the fourth tee and the second solenoid valve in sequence, and merges with the first fluid at the second tee; the first fluid and the second fluid enter the gas-liquid separator after merging at the second tee, and then are compressed to a high temperature and high pressure state by the compressor, and then pass through the third tee and the fourth solenoid valve in sequence to enter the hot water storage tank for heat exchange, and enter the electronic expansion valve through the sixth tee to be throttled to a low temperature and low pressure state, and then return to the seventh tee to form a cycle;

[0020] The indoor air flows in from the second air duct and sequentially passes through the fan, the third air duct, the dehumidification heat exchanger to the fifth air duct and flows into the room.

[0021] Preferably, in the heating mode of the dehumidification heat exchanger, the dehumidification heat exchanger operates as an evaporator, and after the heat pump working fluid evaporates in the dehumidification heat exchanger, it enters the gas-liquid separator through the fourth three-way, the second solenoid valve, and the second three-way in sequence, and then enters the hot water storage tank through the third three-way and the fourth solenoid valve after being compressed in the compressor, and then enters the hot water storage tank through the sixth three-way after exchanging heat with water in the hot water storage tank. It enters the electronic expansion valve and is throttled to a low temperature and low pressure state, and then enters the dehumidification heat exchanger through the seventh three-way, the sixth solenoid valve, the eighth three-way, and the fifth three-way in sequence, forming a cycle;

[0022] The outdoor air flows in from the first air duct and then flows through the fan, the third air duct, the dehumidification heat exchanger, and finally flows into the outdoor through the fourth air duct;

[0023] In the regeneration mode, the PVT heat collector / evaporator operates as an evaporator, and the dehumidification heat exchanger operates as a condenser. After the heat pump working fluid evaporates in the PVT heat collector / evaporator, it enters the gas-liquid separator through the first three-way, the first solenoid valve, and the second three-way in sequence, and then is compressed to a high temperature and high pressure state by the compressor, and then enters the dehumidification heat exchanger through the third three-way, the third solenoid valve, and the fourth three-way in sequence. After being condensed in the dehumidification heat exchanger, it passes through the fifth three-way, the seventh solenoid valve, and the sixth three-way in sequence, and then enters the electronic expansion valve to be throttled to a low temperature and low pressure state, and then enters the PVT heat collector / evaporator through the seventh three-way, forming a cycle;

[0024] The outdoor air flows in from the first air duct and sequentially passes through the fan, the third air duct, the dehumidification heat exchanger to the fourth air duct and flows into the outdoors.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. The present invention can realize year-round cogeneration of heat and power by controlling the start and stop of the compressor, the opening of the electronic expansion valve, the opening and closing of the solenoid valve, the reversal of the three-way air valve and the start and stop of the fan in the heat pump system, thereby meeting the winter heating of the building, the electricity consumption throughout the year and the domestic hot water demand;

[0027] 2. The present invention uses the irradiator to measure and control the opening and closing of the electromagnetic valve, adjust the speed of the compressor, the opening of the electronic expansion valve, the reversal of the three-way air valve and the start and stop of the fan to achieve system operation system / mode switching;

[0028] 3. The present invention meets the temperature requirements of hot water supply and heating through the PVT heating system / mode; at the same time, the DC output of the PVT collector / evaporator is inverted into AC output through the solar inverter, which can drive the compressor, solenoid valve, three-way air valve 2 reversing, fan start and stop or integrate the AC output into the power grid, thereby improving energy utilization and system economy;

[0029] 4. The present invention uses a low-pressure series heating mode system / mode to provide stable heating when the radiation conditions are poor in winter, meet the heat demand of the user side, and improve the stability and reliability of hot water supply in winter; at the same time, the PVT collector / evaporator and the dehumidification heat exchanger are connected in series to operate as an evaporator, which can increase the evaporation temperature of the heat exchanger, thereby improving the system heating COP;

[0030] 5. The present invention uses a dehumidification heat exchanger heating system / mode to provide heat when there is heat demand at the end and no radiation. 6. The present invention uses a dehumidification system / mode. When there is a wet load indoors, the solid adsorption material on the surface of the dehumidification heat exchanger can achieve dehumidification under conditions higher than the dew point temperature, which reduces the demand for evaporation temperature during the dehumidification process and improves the system COP. At the same time, due to the heat input of radiation, the evaporation temperature and system COP of the system are further improved.

[0031] 7. The present invention uses a regeneration system / mode, whereby the desiccant coated on the surface of the dehumidification heat exchanger is heated and regenerated, thereby regaining its adsorption capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0033] Figure 1 The schematic diagram mainly embodies the principle of the dehumidification heat exchanger coupled with the PVT dual-source heat pump cogeneration system of the present invention;

[0034] Figure 2 A schematic diagram mainly showing the principle of the PVT heating system / mode of the present invention;

[0035] Figure 3 A schematic diagram mainly showing the principle of the low-pressure series heating system / mode of the present invention;

[0036] Figure 4 A schematic diagram mainly showing the heating system / mode principle of the dehumidification heat exchanger of the present invention;

[0037] Figure 5 A schematic diagram mainly showing the principle of the dehumidification system / mode of the present invention;

[0038] Figure 6 The main schematic diagram embodies the principle of the regeneration system / mode of the present invention.

[0039] As shown in the figure:

[0040] PVT collector / evaporator 1 Fourth solenoid valve 11 Seventh three-way 21

[0041] Gas-liquid separator 2 Fifth solenoid valve 12 Eighth three-way valve 22

[0042] Compressor 3 Sixth solenoid valve 13 Three-way air valve 23

[0043] Hot water storage tank 4 Seventh solenoid valve 14 Three-way air valve 24

[0044] Electronic expansion valve 5 First three-way 15 Fan 25

[0045] Dehumidification heat exchanger 6 Second three-way 16 First air duct 26

[0046] Solar inverter integrated machine 7 Third three-way 17 Second air duct 27

[0047] First solenoid valve 8 Fourth three-way 18 Third air duct 28

[0048] Second solenoid valve 9 Fifth three-way 19 Fourth air duct 29

[0049] The third solenoid valve 10 The sixth three-way 20 The fifth air duct 30 DETAILED DESCRIPTION

[0050] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several changes and improvements can also be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0051] like Figure 1-6 As shown, the present invention provides a dual-source heat pump cogeneration system of a dehumidification heat exchanger coupled with PVT, including a PVT collector / evaporator 1, a gas-liquid separator 2, a compressor 3, a hot water storage tank 4, an electronic expansion valve 5 or a dehumidification heat exchanger 6 connected to form a PVT heating system, a low-pressure series heating system, a dehumidification heat exchanger heating system, a dehumidification system or a regeneration system.

[0052] The system of the present invention includes a PVT heat collector / evaporator 1, a gas-liquid separator 1, a compressor 3, a heat storage tank 4, an electronic expansion valve 5, a dehumidification heat exchanger 6, a solar energy reverse control integrated machine 7, a solenoid valve, a three-way, a three-way air valve, a fan 25, and an air duct. By controlling the start and stop of the compressor in the heat pump system, the opening of the electronic expansion valve 5, the opening and closing of the solenoid valve, the reversal of the three-way air valve, and the start and stop of the fan, it is possible to achieve year-round cogeneration of heat and power to meet the needs of winter heating, annual electricity consumption, and domestic hot water for buildings; the indoor wet load is treated by a solid adsorption dehumidification heat exchanger (DCHE), and the desiccant achieves dehumidification under conditions higher than the dew point temperature, which reduces the demand for evaporation temperature during the dehumidification process, thereby improving the system COP, and the waste heat of the PVT dual-source heat pump provides the heat required for the regeneration stage of the solid adsorption material of the dehumidification heat exchanger 6, so as to achieve the treatment of indoor wet load in areas with high humidity. The electricity generated by the PVT collector / evaporator 1 can power the system's compressor, solenoid valve, three-way air valve and fan; the opening and closing of the solenoid valve is measured and controlled by the irradiator, and the speed of the compressor 3, the opening of the electronic expansion valve 5, the reversal of the three-way air valve and the start and stop of the fan 25 are adjusted to achieve system operation mode switching. The system of the present invention has a high degree of integration and can achieve efficient solar energy cogeneration. The waste heat provides regenerative heat for the dehumidification heat exchanger to handle indoor wet loads, thereby improving dehumidification efficiency and comprehensive utilization of solar energy. It has important value in the fields of efficient solar energy cogeneration technology and dehumidification technology, and is helpful to achieve carbon neutrality in my country's construction sector.

[0053] Specifically, the PVT collector / evaporator 1, the gas-liquid separator 2, the compressor 3, the hot water storage tank 4, the electronic expansion valve 5 and the dehumidification heat exchanger 6 are connected through solenoid valves, three-way valves, etc. The solenoid valves include a first solenoid valve 8, a second solenoid valve 9, a third solenoid valve 10, a fourth solenoid valve 11, a fifth solenoid valve 12, a sixth solenoid valve 13 and a seventh solenoid valve 14. The three-way valve includes a first three-way valve 15, a second three-way valve 16, a third three-way valve 17, a fourth three-way valve 18, a fifth three-way valve 19, a sixth three-way valve 20, a seventh three-way valve 21 and an eighth three-way valve 22, and a first three-way air valve 23, a second three-way air valve 24, a fan 25, a first air duct 26, a second air duct 27, a third air duct 28, a fourth air duct 29, a fifth air duct 30 and a solar inverter 7. The DC output of the PVT collector / evaporator 1 is inverted into AC output through the solar inverter 7, which can drive a compressor, a solenoid valve, a three-way air valve, etc. or be connected to the power grid, thereby improving energy utilization and system economy.

[0054] like Figure 1 The schematic diagram of the whole system is shown, the outlet end of the PVT collector / evaporator 1 is connected to the first solenoid valve 8 and the fifth solenoid valve 12 through the first three-way 15, the fifth solenoid valve 12 is connected to the sixth solenoid valve 13 and the fifth three-way 19 through the eighth three-way 22, the other two ports of the fifth three-way 19 are connected to one port of the dehumidification heat exchanger 6 and the seventh solenoid valve 14, the other port of the dehumidification heat exchanger 6 is connected to the third solenoid valve 10 and one port of the second solenoid valve 9 through the fourth three-way 18, the other port of the second solenoid valve 9 is connected to the first solenoid valve 8 and the gas-liquid separator 2 through the second three-way 16, the gas-liquid separator 2 and the compressor 3 are connected in series to one port of the third three-way 17 in sequence, and the other two ports of the third three-way 17 are connected to the third solenoid valve 10 and the fourth solenoid valve 11 The fourth solenoid valve 11 and the heat storage tank 4 are connected in series to one port of the sixth three-way valve 20 in sequence, and the other two ports of the sixth three-way valve 20 are connected to the seventh solenoid valve 14 and the electronic expansion valve 5. The outlet end of the electronic expansion valve 5 is connected to the sixth solenoid valve 13 and the inlet end of the PVT collector / evaporator 1 through the seventh three-way valve 21. One end of the first air duct 26 is connected to the outdoors, and the other end of the first air duct 26 is connected to the first three-way air valve 23. The other two ends of the first three-way air valve 23 are connected to the indoor and the third air duct 28. The dehumidification heat exchanger 6 is placed in the third air duct 28. The other end of the third air duct 28 is connected to the second three-way air valve 24. The other end of the second three-way air valve 24 is connected to the outdoors through the fourth air duct 29. The last end of the second three-way air valve 24 is connected to the indoor through the fifth air duct 30.

[0055] Specifically, the PVT collector / evaporator 1 has a structure of tube-sheet type, inflation type, pressure-welded type and heat pipe type, and the working fluid in the collector / evaporator flow channel is a heat pump working fluid. The battery is any one of crystalline silicon, amorphous silicon, copper indium gallium selenide, gallium arsenide, organic compounds, heterojunction, etc. The dehumidification heat exchanger 6 is a fin-tube heat exchanger, the surface of the fin is coated with solid adsorption material, and the working fluid in the tube is a heat pump working fluid.

[0056] like Figure 2 As shown, in the PVT heating system, the second solenoid valve 9, the third solenoid valve 10, the fifth solenoid valve 12, the sixth solenoid valve 13 and the seventh solenoid valve 14 are in the closed state, the first solenoid valve 8 and the fourth solenoid valve 11 are in the open state, the PVT heat collector / evaporator 1 operates as an evaporator, and the dehumidification heat exchanger 6 stops working. The outlet end of the PVT heat collector / evaporator 1 is connected to the gas-liquid separator 2 through the first three-way 15, the first solenoid valve 8, and the second three-way 16 in sequence, the gas-liquid separator 2 is connected to the compressor 3, the compressor 3 is connected to the hot water storage tank 4 through the third three-way 17 and the fourth solenoid valve 11 in sequence, the hot water storage tank 4 is connected to the electronic expansion valve 5 through the sixth three-way 20, and the electronic expansion valve 5 is connected to the inlet end of the PVT heat collector / evaporator 1 through the seventh three-way 21, forming a complete cycle. The first three-way air valve 23 connects the first air duct 26 and the third air duct 28, the second three-way air valve 24 connects the third air duct 28 and the fourth air duct 29, the first air duct 26, the third air duct 28 and the fourth air duct 29 are connected to form an air circuit connected to the outside, the fan 25 stops working, and the air does not flow in the air duct. The PVT heating system provides heat when there is heat demand at the end and the radiation conditions are relatively good. The radiation intensity is measured by the irradiator. If the radiation intensity is greater than the set value I1, the system is started to provide heat. Under this system, the hot water in the hot water storage tank 4 can be heated to 50-65°C, meeting the temperature requirements of hot water supply and heating. The DC output of the PVT collector / evaporator 1 is inverted into AC output through the solar inverter 7, which can drive the compressor 3, the first to seventh solenoid valves, the three-way air valve 23 and the three-way air valve 24 to switch, and the fan 25, or the DC output of the PVT collector / evaporator 1 is inverted into AC output through the solar inverter 7 and incorporated into the power grid, thereby improving energy utilization and system economy.

[0057] like Figure 3As shown, in the low-pressure series heating system, the first solenoid valve 8, the third solenoid valve 10, the sixth solenoid valve 13 and the seventh solenoid valve 14 are in the closed state, and the second solenoid valve 9, the fourth solenoid valve 11 and the fifth solenoid valve 12 are in the open state. At this time, the PVT heat collector / evaporator 1 is connected in series with the dehumidification heat exchanger 6 and both operate as evaporators in the system. The outlet of the PVT heat collector / evaporator 1 is connected to the inlet of the dehumidification heat exchanger 6 through the first three-way 15, the fifth solenoid valve 12, the eighth three-way 22, and the fifth three-way 19 in sequence. The outlet of the dehumidification heat exchanger 6 is connected to the gas-liquid separator 2 through the fourth three-way 18, the second solenoid valve 9, and the second three-way 16 in sequence. The gas-liquid separator 2 is connected to the compressor 3, and the compressor 3 is connected to the hot water storage tank 4 through the third three-way 17 and the fourth solenoid valve 11 in sequence. The hot water storage tank 4 is connected to the electronic expansion valve 5 through the sixth three-way 20, and the electronic expansion valve 5 is connected to the inlet of the PVT heat collector / evaporator 1 through the seventh three-way 21, forming a complete cycle. The first three-way air valve 23 connects the first air duct 26 and the third air duct 28, the second three-way air valve 24 connects the third air duct 28 and the fourth air duct 29, the first air duct 26, the third air duct 28 and the fourth air duct 29 are connected to form an air circuit connected to the outside, the fan 25 is running, and the outdoor air flows through the first air duct 26, the fan 25, the third air duct 28, the dehumidification heat exchanger 6 and the fourth air duct 29 in sequence. The low-pressure series heating system provides heat when there is heat demand at the end and the radiation is insufficient. The radiation intensity is measured by the irradiator. If the radiation intensity is less than the set value I1 and greater than zero, the system is started to provide heat. Under this system, the heat pump working fluid first passes through the PVT collector / evaporator 1 and then passes through the dehumidification heat exchanger 6 and is completely evaporated. Compared with the air source heat pump, due to the heat input of the radiation, the evaporation temperature of the system is increased, thereby increasing the system heating COP. In addition, the DC output of the PVT collector / evaporator 1 is inverted into AC output through the solar inverter 7, which can drive the compressor 3, the first to seventh solenoid valves, the three-way air valve 23 and the three-way air valve 24 to switch, and the start and stop of the fan 25, or the DC output of the PVT collector / evaporator 1 is inverted into AC output through the solar inverter 7 and connected to the power grid.

[0058] like Figure 4As shown, in the heating system of the dehumidification heat exchanger 6, the first solenoid valve 8, the third solenoid valve 10, the fifth solenoid valve 12 and the seventh solenoid valve 14 are in the closed state, and the second solenoid valve 9, the fourth solenoid valve 11 and the sixth solenoid valve 13 are in the open state. At this time, the dehumidification heat exchanger 6 operates as an evaporator, and the PVT heat collector / evaporator 1 stops working. The outlet end of the dehumidification heat exchanger 6 is connected to the gas-liquid separator 2 through the fourth three-way 18, the second solenoid valve 9, and the second three-way 16 in sequence, and the gas-liquid separator 2 is connected to the compressor 3. The compressor 3 is connected to the hot water storage tank 4 through the third three-way 17 and the fourth solenoid valve 11 in sequence. The hot water storage tank 4 is connected to the electronic expansion valve 5 through the sixth three-way 20. The electronic expansion valve 5 is connected to the inlet end of the dehumidification heat exchanger 6 through the seventh three-way 21, the sixth solenoid valve 13, the eighth three-way 22, and the fifth three-way 19 in sequence, forming a complete cycle. The first three-way air valve 23 connects the first air duct 26 and the third air duct 28, the second three-way air valve 24 connects the third air duct 28 and the fourth air duct 29, the first air duct 26, the third air duct 28 and the fourth air duct 29 are connected to form an air circuit connected to the outside, the fan 25 is running, and the air flows through the first air duct 26, the fan 25, the third air duct 28, the dehumidification heat exchanger 6 and the fourth air duct 29 in sequence. The dehumidification heat exchanger heating system provides heat when there is heat demand at the end and there is no radiation. The radiation intensity is measured by the irradiator. If the radiation intensity is zero, the system is started to provide heat. Under this system, the compressor 3, the first to seventh solenoid valves, the three-way air valve 23 and the three-way air valve 24 are switched, and the start and stop of the fan 25 are driven by external input power.

[0059] like Figure 5As shown, in the dehumidification system, the third solenoid valve 10, the fifth solenoid valve 12 and the seventh solenoid valve 14 are in the closed state, the first solenoid valve 8, the second solenoid valve 9, the fourth solenoid valve 11 and the sixth solenoid valve 13 are in the open state, the PVT heat collector / evaporator 1 is connected in parallel with the dehumidification heat exchanger 6 and operates as an evaporator at the same time, and the inlet end of the PVT heat collector / evaporator 1 is connected to the inlet end of the dehumidification heat exchanger 6 through the seventh three-way 21, the sixth solenoid valve 13, the eighth three-way 22, the fifth three-way 19 in sequence. The outlet of the PVT heat collector / evaporator 1 is connected to the outlet of the dehumidification heat exchanger 6 through the first three-way 15, the first solenoid valve 8, the second three-way 16, the second solenoid valve 9, and the fourth three-way 18 in sequence. The second three-way 16 is connected to the gas-liquid separator 2, the gas-liquid separator 2 is connected to the compressor 3, the compressor 3 is connected to the hot water storage tank 4 through the third three-way 17 and the fourth solenoid valve 11 in sequence, the hot water storage tank 4 is connected to the electronic expansion valve 5 through the sixth three-way 20, and the electronic expansion valve 5 is connected to the seventh three-way 21. The heat pump working fluid is divided into two paths at the seventh three-way 21, the first path flows to the PVT heat collector / evaporator 1, and the second path flows to the dehumidification heat exchanger 6, and then converges at the second three-way 16, and after converging, it passes through the gas-liquid separator 2, the compressor 3, the third three-way 17, the fourth solenoid valve 11, the hot water storage tank 4, the sixth three-way 20, and the electronic expansion valve 5 to return to the seventh three-way 21 to form a complete cycle. The first three-way air valve 23 connects the second air duct 27 and the third air duct 28, the second three-way air valve 24 connects the third air duct 28 and the fifth air duct 30, the second air duct 27, the third air duct 28 and the fifth air duct 30 are connected to form an air circuit connected to the room, the fan 25 is running, and the indoor air flows through the second air duct 27, the fan 25, the third air duct 28, the dehumidification heat exchanger 6 and the fifth air duct 30 in sequence. The dehumidification system is an operating system when there is a wet load indoors. Under this system, the solid adsorption material on the surface of the dehumidification heat exchanger 6 can achieve dehumidification under conditions higher than the dew point temperature, reducing the demand for evaporation temperature during the dehumidification process and improving the system COP. At the same time, due to the heat input of radiation, the evaporation temperature and system COP of the system are further improved. In addition, the compressor 3, the first to seventh solenoid valves, the reversal of the three-way air valve 23 and the three-way air valve 24, and the start and stop of the fan 25 can be driven by the output power of the PVT collector / evaporator 1.

[0060] like Figure 6As shown, in the regeneration system, the second solenoid valve 9, the fourth solenoid valve 11, the fifth solenoid valve 12 and the sixth solenoid valve 13 are in the closed state, the first solenoid valve 8, the third solenoid valve 10 and the seventh solenoid valve 14 are in the open state, the PVT collector / evaporator 1 operates as an evaporator, and the dehumidification heat exchanger 6 operates as a condenser. The outlet end of the PVT collector / evaporator 1 is connected to the gas-liquid separator 2 through the first three-way 15, the first solenoid valve 8 and the second three-way 16 in sequence, the gas-liquid separator 2 is connected to the compressor 3, the compressor 3 is connected to the outlet end of the dehumidification heat exchanger 6 through the third three-way 17, the third solenoid valve 10 and the fourth three-way 18 in sequence, the inlet end of the dehumidification heat exchanger 6 is connected to the electronic expansion valve 5 through the fifth three-way 19, the seventh solenoid valve 14 and the sixth three-way 20 in sequence, and the electronic expansion valve 5 is connected to the inlet end of the PVT collector / evaporator 1 through the seventh three-way 21, forming a complete cycle. The first three-way air valve 23 connects the first air duct 26 and the third air duct 28, the second three-way air valve 24 connects the third air duct 28 and the fourth air duct 29, the first air duct 26, the third air duct 28 and the fourth air duct 29 are connected to form an air circuit connected to the outside, the fan 25 is running, and the outdoor air flows through the first air duct 26, the fan 25, the third air duct 28, the dehumidification heat exchanger 6 and the fourth air duct 29 in sequence. Under the regeneration system, the desiccant coated on the surface of the dehumidification heat exchanger 6 is heated and regenerated, and has the adsorption capacity again.

[0061] The present invention also provides an operation method of a dehumidification heat exchanger coupled with a PVT dual-source heat pump cogeneration system, including a PVT heating mode, a low-pressure series heating mode, a dehumidification heat exchanger heating mode, a dehumidification mode or a regeneration mode formed by connecting any of the PVT heat collector / evaporator, a gas-liquid separator, a compressor, a heat storage tank, an electronic expansion valve or a dehumidification heat exchanger. The operation mode is switched by the irradiator to measure and control the opening and closing of the solenoid valve, adjust the speed of the compressor, the opening of the electronic expansion valve, the reversal of the three-way air valve and the start and stop of the fan.

[0062] like Figure 1As shown, the outlet end of the PVT heat collector / evaporator 1 is connected to the first solenoid valve 8 and the fifth solenoid valve 12 through the first three-way connection 15, the fifth solenoid valve 12 is connected to the sixth solenoid valve 13 and the fifth three-way connection 19 through the eighth three-way connection 22, the other two ports of the fifth three-way connection 19 are connected to a port of the dehumidification heat exchanger 6 and the seventh solenoid valve 14, the other port of the dehumidification heat exchanger 6 is connected to the third solenoid valve 10 and a port of the second solenoid valve 9 through the fourth three-way connection 18, the other port of the second solenoid valve 9 is connected to the first solenoid valve 8 and the gas-liquid separator 2 through the second three-way connection 16, the gas-liquid separator 2 and the compressor 3 are connected in series to a port of the third three-way connection 17 in sequence, the other two ports of the third three-way connection 17 are connected to the third solenoid valve 10 and the fourth solenoid valve 11, the fourth three-way connection 18 is connected to the third solenoid valve 10 and the fourth solenoid valve 11, and the fourth three-way connection 19 is connected to the third solenoid valve 10 and the fourth solenoid valve 11. The magnetic valve 11 and the heat storage tank 4 are connected in series to one port of the sixth three-way valve 20 in sequence, and the other two ports of the sixth three-way valve 20 are connected to the seventh solenoid valve 14 and the electronic expansion valve 5. The outlet end of the electronic expansion valve 5 is connected to the sixth solenoid valve 13 and the inlet end of the PVT collector / evaporator 1 through the seventh three-way valve 21. One end of the first air duct 26 is connected to the outdoors, and the other end of the first air duct 26 is connected to the first three-way air valve 23. The other two ends of the first three-way air valve 23 are connected to the indoor and the third air duct 28. The dehumidification heat exchanger 6 is placed in the third air duct 28. The other end of the third air duct 28 is connected to the second three-way air valve 24. The other end of the second three-way air valve 24 is connected to the outdoors through the fourth air duct 29, and the last end of the second three-way air valve 24 is connected to the indoor through the fifth air duct 30.

[0063] like Figure 2As shown, in the PVT heating mode, the second solenoid valve 9, the third solenoid valve 10, the fifth solenoid valve 12, the sixth solenoid valve 13 and the seventh solenoid valve 14 are in the closed state, the first solenoid valve 8 and the fourth solenoid valve 11 are in the open state, the PVT heat collector / evaporator 1 operates as an evaporator, and the dehumidification heat exchanger 6 stops working. After the heat pump working fluid undergoes phase change and evaporates in the PVT heat collector / evaporator 1, it enters the gas-liquid separator 2 through the first three-way valve 15, the first solenoid valve 8, and the second three-way valve 16 in sequence, and then is compressed to a high temperature and high pressure state by the compressor 3, and then enters the hot water storage tank 4 through the third three-way valve 17 and the fourth solenoid valve 11 in sequence, and then enters the electronic expansion valve 5 through the sixth three-way valve 20 after heat exchange with water in the hot water storage tank 4, and is throttled to a low temperature and low pressure state, and then re-enters the PVT heat collector / evaporator 1 through the seventh three-way valve 21 to form a complete cycle. The first three-way air valve 23 connects the first air duct 26 and the third air duct 28, the second three-way air valve 24 connects the third air duct 28 and the fourth air duct 29, the first air duct 26, the third air duct 28 and the fourth air duct 29 are connected to form an air circuit connected to the outside, the fan 25 stops working, and the air does not flow in the air duct. The PVT heating mode is a heating mode when there is a heat demand at the end and the irradiation conditions are relatively good. The irradiation intensity is measured by the irradiator. If the irradiation intensity is greater than the set value I1, heating will be provided by this mode. In this mode, the hot water in the hot water storage tank 4 can be heated to 50-65°C, meeting the temperature requirements of hot water supply and heating. The DC output of the PVT collector / evaporator 1 is inverted into AC output through the solar inverter 7, which can drive the compressor 3, the first to seventh solenoid valves, the three-way air valve 23 and the three-way air valve 24 to switch, and the fan 25, or the DC output of the PVT collector / evaporator 1 is inverted into AC output through the solar inverter 7 and incorporated into the power grid, thereby improving energy utilization and system economy.

[0064] like Figure 3As shown, in the low-pressure series heating mode, the first solenoid valve 8, the third solenoid valve 10, the sixth solenoid valve 13 and the seventh solenoid valve 14 are in a closed state, and the second solenoid valve 9, the fourth solenoid valve 11 and the fifth solenoid valve 12 are in an open state. At this time, the PVT collector / evaporator 1 and the dehumidification heat exchanger 6 are connected in series and both operate as evaporators in the system. After the heat pump working fluid evaporates from the PVT collector / evaporator 1, it enters the dehumidification heat exchanger 6 through the first tee 15, the fifth solenoid valve 12, the eighth tee 22, and the fifth tee 19 in sequence. After the heat pump working fluid is completely evaporated in the dehumidification heat exchanger 6, it enters the gas-liquid separator 2 through the fourth tee 18, the second solenoid valve 9, and the second tee 16 in sequence, and then enters the hot water storage tank 4 after being compressed in the compressor 3. After exchanging heat with water in the hot water storage tank 4, it enters the electronic expansion valve 5 through the sixth tee 20 and is throttled to a low temperature and low pressure state, and then re-enters the PVT collector / evaporator 1 through the seventh tee 21 to form a complete cycle. The first three-way air valve 23 connects the first air duct 26 and the third air duct 28, the second three-way air valve 24 connects the third air duct 28 and the fourth air duct 29, the first air duct 26, the third air duct 28 and the fourth air duct 29 are connected to form an air circuit connected to the outside, the fan 25 is running, and the outdoor air flows through the first air duct 26, the fan 25, the third air duct 28, the dehumidification heat exchanger 6 and the fourth air duct 29 in sequence. The low-pressure series heating mode is a heating mode when there is heat demand at the end and insufficient radiation. The radiation intensity is measured by the irradiator. If the radiation intensity is less than the set value I1 and greater than zero, this mode will be used for heating. In this mode, the heat pump working fluid first passes through the PVT collector / evaporator 1 and then passes through the dehumidification heat exchanger 6 and is completely evaporated. Compared with the air source heat pump, due to the heat input of the radiation, the evaporation temperature of the system is increased, thereby increasing the system heating COP. In addition, the DC output of the PVT collector / evaporator 1 is inverted into AC output through the solar inverter 7, which can drive the compressor 3, the first to seventh solenoid valves, the three-way air valve 23 and the three-way air valve 24 to switch, and the start and stop of the fan 25, or the DC output of the PVT collector / evaporator 1 is inverted into AC output through the solar inverter 7 and connected to the power grid.

[0065] like Figure 4As shown, in the heating mode of the dehumidification heat exchanger, the first solenoid valve 8, the third solenoid valve 10, the fifth solenoid valve 12 and the seventh solenoid valve 14 are in the closed state, and the second solenoid valve 9, the fourth solenoid valve 11 and the sixth solenoid valve 13 are in the open state. At this time, the dehumidification heat exchanger 6 operates as an evaporator, and the PVT heat collector / evaporator 1 stops working. After the heat pump working fluid is completely evaporated in the dehumidification heat exchanger 6, it enters the gas-liquid separator 2 through the fourth three-way 18, the second solenoid valve 9, and the second three-way 16 in sequence, and then enters the hot water storage tank 4 through the third three-way 17 and the fourth solenoid valve 11 after being compressed in the compressor 3. After exchanging heat with water in the hot water storage tank 4, it enters the electronic expansion valve 5 through the sixth three-way 20 and is throttled to a low temperature and low pressure state, and then re-enters the dehumidification heat exchanger 6 through the seventh three-way 21, the sixth solenoid valve 13, the eighth three-way 22, and the fifth three-way 19 in sequence to form a complete cycle. The first three-way air valve 23 connects the first air duct 26 and the third air duct 28, the second three-way air valve 24 connects the third air duct 28 and the fourth air duct 29, the first air duct 26, the third air duct 28 and the fourth air duct 29 are connected to form an air circuit connected to the outside, the fan 25 is running, and the air flows through the first air duct 26, the fan 25, the third air duct 28, the dehumidification heat exchanger 6 and the fourth air duct 29 in sequence. The dehumidification heat exchanger heating mode is a heating mode when there is heat demand at the end and no radiation. The radiation intensity is measured by the irradiator. If the radiation intensity is zero, heating will be provided by this mode. In this mode, the compressor 3, the first to seventh solenoid valves, the three-way air valve 23 and the three-way air valve 24 are switched, and the start and stop of the fan 25 are driven by external input power.

[0066] like Figure 5As shown, in the dehumidification mode, the third solenoid valve 10, the fifth solenoid valve 12 and the seventh solenoid valve 14 are in the closed state, the first solenoid valve 8, the second solenoid valve 9, the fourth solenoid valve 11 and the sixth solenoid valve 13 are in the open state, the PVT collector / evaporator 1 is connected in parallel with the dehumidification heat exchanger 6 and operates as an evaporator at the same time, the inlet end of the PVT collector / evaporator 1 is connected to the inlet end of the dehumidification heat exchanger 6 through the seventh three-way valve 21, the sixth solenoid valve 13, the eighth three-way valve 22, and the fifth three-way valve 19 in sequence, and the outlet end of the PVT collector / evaporator 1 is connected to the outlet end of the dehumidification heat exchanger 6 through the first three-way valve 15, the first solenoid valve 8, the second three-way valve 16, the second solenoid valve 9, and the fourth three-way valve 18. The heat pump working fluid is divided into two fluids at the seventh tee 21: a first fluid and a second fluid, wherein the first fluid enters the PVT heat collector / evaporator 1, and after the first fluid undergoes phase change and evaporates in the PVT heat collector / evaporator 1, it passes through the first tee 15 and the first solenoid valve 8 in sequence, and merges with the second fluid at the second tee 16; the second fluid passes through the sixth solenoid valve 13, the eighth tee 22, and the fifth tee 19 in sequence and enters the dehumidification heat exchanger 6, and after the second fluid undergoes phase change and evaporates in the dehumidification heat exchanger 6, it passes through the fourth tee 18 and the second solenoid valve 9 in sequence, and merges with the first fluid at the second tee 16; the first fluid and the second fluid enter the gas-liquid separator 2 after merging at the second tee 16, and then are compressed to a high temperature and high pressure state by the compressor 3, and then pass through the third tee 17 and the fourth solenoid valve 11 in sequence to enter the hot water storage tank 4 for heat exchange, and enter the electronic expansion valve 5 through the sixth tee 20 to be throttled to a low temperature and low pressure state, and finally return to the seventh tee 21 to form a complete cycle. The first three-way air valve 23 connects the second air duct 27 and the third air duct 28, the second three-way air valve 24 connects the third air duct 28 and the fifth air duct 30, the second air duct 27, the third air duct 28 and the fifth air duct 30 are connected to form an air circuit connected to the room, the fan 25 is running, and the indoor air flows through the second air duct 27, the fan 25, the third air duct 28, the dehumidification heat exchanger 6 and the fifth air duct 30 in sequence. The dehumidification mode is an operation mode when there is a wet load indoors. In this mode, the solid adsorption material on the surface of the dehumidification heat exchanger 6 can achieve dehumidification under conditions higher than the dew point temperature, reducing the demand for evaporation temperature during the dehumidification process and improving the system COP. At the same time, due to the heat input of radiation, the evaporation temperature and system COP of the system are further improved. In addition, the compressor 3, the first to seventh solenoid valves, the reversal of the three-way air valve 23 and the three-way air valve 24, and the start and stop of the fan 25 can be driven by the output power of the PVT collector / evaporator 1.

[0067] like Figure 6As shown, in the regeneration mode, the second solenoid valve 9, the fourth solenoid valve 11, the fifth solenoid valve 12 and the sixth solenoid valve 13 are in the closed state, the first solenoid valve 8, the third solenoid valve 10 and the seventh solenoid valve 14 are in the open state, the PVT collector / evaporator 1 operates as an evaporator, and the dehumidification heat exchanger 6 operates as a condenser. After the heat pump working medium evaporates in the PVT collector / evaporator 1, it enters the gas-liquid separator 2 from the outlet end of the PVT collector / evaporator 1 through the first three-way valve 15, the first solenoid valve 8, and the second three-way valve 16 in sequence, and then is compressed to a high temperature and high pressure state by the compressor 3, and then enters the dehumidification heat exchanger 6 through the third three-way valve 17, the third solenoid valve 10, and the fourth three-way valve 18 in sequence. After being condensed in the dehumidification heat exchanger 6, the heat pump working medium passes through the fifth three-way valve 19, the seventh solenoid valve 14, and the sixth three-way valve 20 in sequence, and then enters the electronic expansion valve 5 to be throttled to a low temperature and low pressure state, and then re-enters the PVT collector / evaporator 1 through the seventh three-way valve 21 to form a complete cycle. The first three-way air valve 23 connects the first air duct 26 and the third air duct 28, the second three-way air valve 24 connects the third air duct 28 and the fourth air duct 29, the first air duct 26, the third air duct 28 and the fourth air duct 29 are connected to form an air circuit connected to the outside, the fan 25 is running, and the outdoor air flows through the first air duct 26, the fan 25, the third air duct 28, the dehumidification heat exchanger 6 and the fourth air duct 29 in sequence. In the regeneration mode, the desiccant coated on the surface of the dehumidification heat exchanger 6 is heated and regenerated, and has the adsorption capacity again.

[0068] The operation method of the dehumidification heat exchanger coupled PVT dual-source heat pump cogeneration system of the present invention is that in different modes, the speed of the compressor 3, the opening of the electronic expansion valve 5, the reversing of the three-way air valve 23-24 and the start and stop of the fan 25 will change according to the radiation intensity and the ambient temperature, so as to improve the operation energy efficiency under the premise of meeting the heat demand and dehumidification demand on the user side.

[0069] The operation method of the dehumidification heat exchanger coupled with the PVT dual-source heat pump cogeneration system of the present invention can provide stable heat supply through the low-pressure series heating mode when the radiation conditions in winter are poor, thereby improving the stability and reliability of hot water supply in winter. The low-pressure series heating mode can increase the evaporation temperature of the dehumidification heat exchanger, thereby improving the heating COP of the system. The power generated by the system can be supplied to the operation of components such as the compressor, solenoid valve, three-way air valve and fan in the system, thereby improving energy utilization. In addition, under the premise of meeting the stable heating requirement, the indoor wet load is treated by a solid adsorption dehumidification heat exchanger (DCHE), which reduces the requirements for the evaporation temperature of the dehumidification process, improves the system COP, and provides the regeneration heat required for the regeneration stage of the solid adsorption material of the dehumidification heat exchanger through the waste heat of the PVT dual-source heat pump. The system can realize efficient solar energy cogeneration, and the waste heat provides regeneration heat for the dehumidification heat exchanger, thereby improving the dehumidification efficiency and the comprehensive utilization rate of solar energy.

[0070] In the description of the present application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0071] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

Claims

1. A dehumidification heat exchanger coupled PVT dual-source heat pump cogeneration system, characterized in that: The invention comprises a PVT heating system, a low-pressure series heating system, a dehumidification heat exchanger (6) heating system, a dehumidification system or a regeneration system formed by connecting any of the following: a PVT heat collector / evaporator (1), a gas-liquid separator (2), a compressor (3), a heat storage tank (4), an electronic expansion valve (5) or a dehumidification heat exchanger (6).

2. The dehumidification heat exchanger coupled PVT dual-source heat pump cogeneration system according to claim 1, characterized in that: In the PVT heating system, the outlet end of the PVT heat collector / evaporator (1) is connected to the gas-liquid separator (2) through a first tee (15), a first solenoid valve (8), and a second tee (16) in sequence, the gas-liquid separator (2) is connected to the compressor (3), the compressor (3) is connected to the hot water storage tank (4) through a third tee (17) and a fourth solenoid valve (11) in sequence, the hot water storage tank (4) is connected to the electronic expansion valve (5) through a sixth tee (20), and the electronic expansion valve (5) is connected to the inlet end of the PVT heat collector / evaporator (1) through a seventh tee (21), thereby forming a cycle.

3. The dehumidification heat exchanger coupled PVT dual-source heat pump cogeneration system according to claim 1, characterized in that: In the low-pressure series heating system, the outlet end of the PVT heat collector / evaporator (1) is connected to the inlet end of the dehumidification heat exchanger (6) through the first three-way (15), the fifth solenoid valve (12), the eighth three-way (22), and the fifth three-way (19) in sequence; the outlet end of the dehumidification heat exchanger (6) is connected to the gas-liquid separator (2) through the fourth three-way (18), the second solenoid valve (9), and the second three-way (16) in sequence; the gas-liquid separator (2) is connected to the compressor (3); the compressor (3) is connected to the hot water storage tank (4) through the third three-way (17) and the fourth solenoid valve (11) in sequence; the hot water storage tank (4) is connected to the electronic expansion valve (5) through the sixth three-way (20); the electronic expansion valve (5) is connected to the inlet end of the PVT heat collector / evaporator (1) through the seventh three-way (21), thereby forming a cycle.

4. The dehumidification heat exchanger coupled PVT dual-source heat pump cogeneration system according to claim 1, characterized in that: In the dehumidification heat exchanger heating system, the outlet end of the dehumidification heat exchanger (6) is connected to the gas-liquid separator (2) through the fourth three-way (18), the second solenoid valve (9), and the second three-way (16) in sequence, the gas-liquid separator (2) is connected to the compressor (3), the compressor (3) is connected to the hot water storage tank (4) through the third three-way (17) and the fourth solenoid valve (11) in sequence, the hot water storage tank (4) is connected to the electronic expansion valve (5) through the sixth three-way (20), and the electronic expansion valve (5) is connected to the inlet end of the dehumidification heat exchanger (6) through the seventh three-way (21), the sixth solenoid valve (13), the eighth three-way (22), and the fifth three-way (19) in sequence, forming a cycle.

5. The dehumidification heat exchanger coupled PVT dual-source heat pump cogeneration system according to claim 1, characterized in that: In the dehumidification system, the PVT heat collector / evaporator (1) is connected in parallel with the dehumidification heat exchanger (6); the inlet end of the PVT heat collector / evaporator (1) is connected to the inlet end of the dehumidification heat exchanger (6) through the seventh tee (21), the sixth solenoid valve (13), the eighth tee (22), and the fifth tee (19) in sequence; and the outlet end of the PVT heat collector / evaporator (1) is connected to the outlet end of the dehumidification heat exchanger (6) through the first tee (15), the first solenoid valve (8), the second tee (16), the second solenoid valve (9), and the fourth tee (18) in sequence; The second three-way valve (16) is connected to the gas-liquid separator (2), the gas-liquid separator (2) is connected to the compressor (3), the compressor (3) is connected to the hot water storage tank (4) via the third three-way valve (17) and the fourth solenoid valve (11) in sequence, the hot water storage tank (4) is connected to the electronic expansion valve (5) via the sixth three-way valve (20), and the electronic expansion valve (5) is connected to the seventh three-way valve (21).

6. The dehumidification heat exchanger coupled PVT dual-source heat pump cogeneration system according to claim 1, characterized in that: In the regeneration system, the outlet end of the PVT heat collector / evaporator (1) is connected to the gas-liquid separator (2) through the first three-way valve (15), the first solenoid valve (8), and the second three-way valve (16) in sequence, the gas-liquid separator (2) is connected to the compressor (3), the compressor (3) is connected to the outlet end of the dehumidification heat exchanger (6) through the third three-way valve (17), the third solenoid valve (10), and the fourth three-way valve (18) in sequence, the inlet end of the dehumidification heat exchanger (6) is connected to the electronic expansion valve (5) through the fifth three-way valve (19), the seventh solenoid valve (14), and the sixth three-way valve (20) in sequence, and the electronic expansion valve (5) is connected to the inlet end of the PVT heat collector / evaporator (1) through the seventh three-way valve (21), forming a cycle.

7. A method for operating a dehumidification heat exchanger coupled with a PVT dual-source heat pump cogeneration system, characterized in that: The invention comprises a PVT heating mode, a low-pressure series heating mode, a dehumidification heat exchanger (6) heating mode, a dehumidification mode or a regeneration mode formed by connecting any of the PVT collector / evaporator (1), a gas-liquid separator (2), a compressor (3), a heat storage tank (4), an electronic expansion valve (5) or a dehumidification heat exchanger (6).

8. The operation method of the dehumidification heat exchanger coupled PVT dual-source heat pump cogeneration system according to claim 7, characterized in that: In the PVT heating mode, the PVT heat collector / evaporator (1) operates as an evaporator. After the heat pump working fluid evaporates in the PVT heat collector / evaporator (1), it enters the gas-liquid separator (2) through the first tee (15), the first solenoid valve (8), and the second tee (16) in sequence. It is then compressed to a high-temperature and high-pressure state by the compressor (3) and then enters the hot water storage tank (4) through the third tee (17) and the fourth solenoid valve (11). After exchanging heat with water in the hot water storage tank (4), it enters the electronic expansion valve (5) through the sixth tee (20) and is throttled to a low-temperature and low-pressure state. It then enters the PVT heat collector / evaporator (1) through the seventh tee (21), forming a cycle. In the low-pressure series heating mode, the PVT heat collector / evaporator (1) and the dehumidification heat exchanger (6) are connected in series and both operate as evaporators. After the heat pump working fluid evaporates in the PVT heat collector / evaporator (1), it enters the dehumidification heat exchanger (6) through the first three-way (15), the fifth solenoid valve (12), the eighth three-way (22), and the fifth three-way (19) in sequence. After evaporating in the dehumidification heat exchanger (6), it enters the gas-liquid separator (2) through the fourth three-way (18), the second solenoid valve (9), and the second three-way (16) in sequence. After being compressed in the compressor (3), it enters the hot water storage tank (4) through the third three-way (17) and the fourth solenoid valve (11) in sequence. After exchanging heat with water in the hot water storage tank (4), it enters the electronic expansion valve (5) through the sixth three-way (20) and is throttled to a low-temperature and low-pressure state. It then enters the PVT heat collector / evaporator (1) through the seventh three-way (21), forming a cycle. Outdoor air flows in from the first air duct (26), then flows in sequence through the fan (25), the third air duct (28), the dehumidification heat exchanger (6), and the fourth air duct (29) before flowing into the outdoors.

9. The operation method of the dehumidification heat exchanger coupled PVT dual-source heat pump cogeneration system according to claim 7, characterized in that: In the dehumidification mode, the PVT heat collector / evaporator (1) is connected in parallel with the dehumidification heat exchanger (6) and operates as an evaporator at the same time; the inlet end of the PVT heat collector / evaporator (1) is connected to the inlet end of the dehumidification heat exchanger (6) through the seventh three-way valve (21), the sixth solenoid valve (13), the eighth three-way valve (22), and the fifth three-way valve (19) in sequence; and the outlet end of the PVT heat collector / evaporator (1) is connected to the outlet end of the dehumidification heat exchanger (6) through the first three-way valve (15), the first solenoid valve (8), the second three-way valve (16), the second solenoid valve (9), and the fourth three-way valve (18) in sequence; The heat pump working fluid is divided into two fluid paths at the seventh tee (21), the two fluid paths comprising a first fluid and a second fluid, wherein the first fluid enters the PVT heat collector / evaporator (1), and after evaporating in the PVT heat collector / evaporator (1), the first fluid passes through the first tee (15) and the first solenoid valve (8) in sequence, and merges with the second fluid at the second tee (16); the second fluid passes through the sixth solenoid valve (13), the eighth tee (22), and the fifth tee (19) in sequence, and enters the dehumidification heat exchanger (6), and the second fluid in the dehumidification heat exchanger (6) After evaporation, the liquid passes through the fourth tee (18) and the second solenoid valve (9) in sequence, and merges with the first fluid at the second tee (16); after the first fluid and the second fluid merge at the second tee (16), they enter the gas-liquid separator (2), are compressed to a high-temperature and high-pressure state by the compressor (3), and then pass through the third tee (17) and the fourth solenoid valve (11) in sequence to enter the hot water storage tank (4) for heat exchange, pass through the sixth tee (20), enter the electronic expansion valve (5), are throttled to a low-temperature and low-pressure state, and then return to the seventh tee (21) to form a cycle; Indoor air flows in from the second air duct (27), then flows in sequence through the fan (25), the third air duct (28), the dehumidification heat exchanger (6), and the fifth air duct (30) before flowing into the room.

10. The operation method of the dehumidification heat exchanger coupled PVT dual-source heat pump cogeneration system according to claim 7, characterized in that: In the heating mode of the dehumidifying heat exchanger, the dehumidifying heat exchanger (6) operates as an evaporator. After the heat pump working fluid evaporates in the dehumidifying heat exchanger (6), it enters the gas-liquid separator (2) through the fourth tee (18), the second solenoid valve (9), and the second tee (16) in sequence. After being compressed in the compressor (3), it enters the hot water storage tank (4) through the third tee (17) and the fourth solenoid valve (11) in sequence. After exchanging heat with water in the hot water storage tank (4), it enters the electronic expansion valve (5) through the sixth tee (20) and is throttled to a low temperature and low pressure state. After that, it enters the dehumidifying heat exchanger (6) through the seventh tee (21), the sixth solenoid valve (13), the eighth tee (22), and the fifth tee (19) in sequence, thereby forming a cycle. Outdoor air flows in from the first air duct (26), then flows through the fan (25), the third air duct (28), the dehumidification heat exchanger (6), and the fourth air duct (29) in sequence and flows into the outdoors; In the regeneration mode, the PVT heat collector / evaporator (1) operates as an evaporator, and the dehumidification heat exchanger (6) operates as a condenser. After the heat pump working fluid evaporates in the PVT heat collector / evaporator (1), it enters the gas-liquid separator (2) through the first tee (15), the first solenoid valve (8), and the second tee (16) in sequence, and is then compressed to a high-temperature and high-pressure state by the compressor (3) and then enters the dehumidification heat exchanger (6) through the third tee (17), the third solenoid valve (10), and the fourth tee (18) in sequence. After being condensed in the dehumidification heat exchanger (6), it passes through the fifth tee (19), the seventh solenoid valve (14), and the sixth tee (20) in sequence, and then enters the electronic expansion valve (5) to be throttled to a low-temperature and low-pressure state, and then enters the PVT heat collector / evaporator (1) through the seventh tee (21), forming a cycle. Outdoor air flows in from the first air duct (26), then flows in sequence through the fan (25), the third air duct (28), the dehumidification heat exchanger (6), and the fourth air duct (29) before flowing into the outdoors.

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