Machine-pump combined drive PVT-air energy injection-compression combined heat pump combined cooling heating and power cogeneration system

Abstract

The invention relates to a machine-pump combined drive PVT-air energy injection-compression composite heat pump combined cooling heating and power cogeneration system which comprises a refrigerant system, a hot water system, a chilled water system and a power supply system. The system is composed of a compressor, a steam ejector, a finned heat exchanger, a hot water heat exchanger, a liquid storage device, a fluorine pump, a condensation type PVT array, a two-phase ejector, a gas-liquid separator, an electronic expansion valve, a chilled water heat exchanger, a three-way valve, a one-way valve, a hot water circulating pump, a chilled water supply pump, a direct-current converter and an alternating-current and direct-current inverter, and combined cooling, heating and power can be achieved. Renewable energy solar energy and an air energy system are used as cold and heat sources, multi-source coupling is achieved, the energy structure is reasonable, and the system capacity is diversified; the compressor and the fluorine pump are used as system driving force, and system energy supply is stable and efficient; the throttling loss and the overheating loss of the heat pump system are effectively reduced through the jet refrigeration technology; the system is energy-saving, efficient, green, low-carbon and low in operation cost, and has popularization and application values.

Description

Technical Field

[0001] The present invention belongs to the technical field of solar photovoltaic-thermal-air energy composite heat pumps, and in particular to a machine-pump-coupled-drive PVT-air energy injection-compression composite heat pump cooling, heating and power cogeneration system. Background Art

[0002] At present, both the solar photovoltaic and solar thermal industries have encountered bottlenecks in their own development, and are in urgent need of developing photovoltaic and solar thermal integration (PVT) technology that can further improve the comprehensive utilization efficiency of solar energy. At the same time, the development of green buildings, clean heating, low-energy consumption and near-zero energy consumption building technologies calls for the maximum use of solar energy to solve the energy needs of building heat, electricity, cooling and domestic hot water, and urgently needs to solve the problems of solar heating and cooling integration, and solar energy and building integration. In recent years, solar photovoltaic and solar thermal integration (PVT) heat pump technology, which integrates solar photovoltaic utilization technology, solar thermal utilization technology and heat pump technology, has become a hot spot and difficulty in the field of solar energy research.

[0003] However, due to the periodicity, intermittency, low and uneven energy density of solar energy, PVT heat pump technology faces the problem of poor production capacity stability and security, which limits the large-scale promotion and application of this technology. Therefore, it is urgent to explore a multi-source, stable and efficient heat pump technology path that complements renewable energy solar energy. Summary of the invention

[0004] In response to the above problems, the purpose of the embodiments of the present invention is to use renewable energy sources such as solar energy and air energy as the cold and heat sources of the system, and the compressor and fluorine pump as the driving force of the system, to effectively integrate and coordinate the injection refrigeration technology, solar energy PVT technology, and multi-source coupled heat pump technology, so as to achieve stable, efficient, green and low-carbon diversified energy output of cold, heat and electricity for the system.

[0005] To achieve the above-mentioned purpose, the embodiment of the present invention provides a PVT-air energy injection-compression composite heat pump cooling, heating and power cogeneration system driven by a machine and pump, the system comprising a refrigerant system, a hot water system, a chilled water system, and a power supply system;

[0006] The refrigerant system mainly consists of a fluorine pump driven PVT-air energy injection refrigeration cycle system and a compressor driven PVT-air energy injection-compression compound cycle system;

[0007] The fluorine pump driven PVT-air energy injection refrigeration cycle system is mainly composed of a steam ejector, a finned heat exchanger 1, a hot water heat exchanger, a liquid reservoir, a fluorine pump, a focusing type PVT array, a gas-liquid separator, an electronic expansion valve, a finned heat exchanger 2, a chilled water heat exchanger, a three-way valve 2, a three-way valve 3, a three-way valve 4, a check valve 2, a check valve 3, and a check valve 5. The fluorine pump is sequentially connected to the focusing type PVT array and the three-way valve 2 and then separated into two paths, one of which is connected to the check valve 3; the other is connected to the high-pressure inlet end of the steam ejector and then its outlet is connected to the check valve 2. The above two paths are collected and sequentially connected to the finned heat exchanger 1 and the hot water heat exchanger and then separated into two paths, one of which is connected to the fluorine pump inlet through the liquid reservoir; the other is sequentially connected to the low-pressure inlet section of the steam ejector through the three-way valve 3, the gas-liquid separator, the electronic expansion valve, the finned heat exchanger 2, the chilled water heat exchanger, the three-way valve 4, and the check valve 5;

[0008] The compressor driven PVT-air energy injection-compression compound cycle system is mainly composed of a compressor, a finned heat exchanger 1, a hot water heat exchanger, a two-phase injector, a gas-liquid separator, an electronic expansion valve, a finned heat exchanger 2, a chilled water heat exchanger, a three-way valve 1, a three-way valve 3, a three-way valve 4, and a check valve 4. The compressor is separated into two paths after passing through the three-way valve 1, the check valve 4, the finned heat exchanger 1, the hot water heat exchanger, the three-way valve 3, the two-phase injector, and the gas-liquid separator in sequence. One path is separated from the top of the gas-liquid separator and then connected to the compressor inlet; the other path is separated from the bottom of the gas-liquid separator and then connected to the electronic expansion valve, the finned heat exchanger 2, the chilled water heat exchanger, the three-way valve 4 in sequence, and then connected to the low-pressure inlet of the two-phase injector;

[0009] Compressor types include rotary, scroll, and piston;

[0010] The types of hot water heat exchangers and chilled water heat exchangers include flat plate, spiral plate, plate fin, immersed spiral tube, shell and tube, and shell and tube;

[0011] The electronic expansion valve can be replaced by a thermal expansion valve or a capillary tube;

[0012] The types of solar cell elements for concentrating PVT arrays include monocrystalline silicon, polycrystalline silicon, copper indium gallium selenide, gallium arsenide, cadmium telluride, and perovskite.

[0013] The hot water system is mainly composed of a hot water heat exchanger and a hot water circulation pump. The water side of the hot water heat exchanger is connected to the hot water circulation pump through a water pipeline.

[0014] The chilled water system is mainly composed of a chilled water heat exchanger and a chilled water circulation pump. The water side of the chilled water heat exchanger is connected to the chilled water circulation pump through a water pipeline.

[0015] The power supply system is mainly composed of a concentrating PVT array, a DC converter, and an AC / DC inverter. The power supply system is divided into two routes, one route is connected to the concentrating PVT array and the DC converter, and the other route is connected to the municipal power grid and the AC / DC inverter. The above two routes are connected to the compressor, the first fan of the finned heat exchanger, the second fan of the finned heat exchanger, the hot water circulation pump, and the chilled water circulation pump after being combined;

[0016] The motors of the compressor, finned heat exchanger one fan, fluorine pump, finned heat exchanger two fan, hot water circulation pump, and chilled water circulation pump are DC driven, and their types include brushless DC, brushed DC, and permanent magnet DC.

[0017] By controlling the compressor, the fan of finned heat exchanger 1, the fluorine pump, the electronic expansion valve, the fan of finned heat exchanger 2, the three-way valve 1, the three-way valve 2, the three-way valve 3, the four-way valve, the hot water circulation pump, and the chilled water circulation pump, the system can switch between the following operating modes:

[0018] Mode 1: The fluorine pump and hot water circulation pump are turned on, and the system runs the fluorine pump to drive the solar evaporation-condensation cycle cogeneration mode;

[0019] Mode 2: The fan, fluorine pump, electronic expansion valve, three-way valve 2, three-way valve 3, three-way valve 4 and chilled water circulation pump of finned heat exchanger 1 are turned on, and the system runs the fluorine pump to drive the air energy injection refrigeration cycle in the combined cooling and power generation mode;

[0020] Mode 3: fluorine pump, electronic expansion valve, three-way valve 2, three-way valve 3, three-way valve 4, chilled water circulation pump is turned on, and the system runs the fluorine pump to drive the solar-air energy jet refrigeration cycle in the combined cooling, heating and power generation mode;

[0021] Mode 4: The compressor, electronic expansion valve, fan of finned heat exchanger 2, and hot water circulation pump are turned on, and the system runs the compressor-driven air energy injection-compression combined cycle cogeneration mode;

[0022] Mode 5: The compressor, the fan of the finned heat exchanger 1, the electronic expansion valve, and the chilled water circulation pump are turned on, and the system runs the compressor-driven air energy injection-compression compound cycle cooling and power cogeneration mode;

[0023] Mode 6: The compressor, electronic expansion valve, hot water circulation pump, and chilled water circulation pump are turned on, and the system operates in a compressor-driven injection-compression compound cycle cogeneration mode with condensation heat as the heat source;

[0024] Mode 7: The compressor, fluorine pump, electronic expansion valve, fan of finned heat exchanger 2, three-way valve 1, three-way valve 2, and hot water circulation pump are turned on, and the system operates in a combined heat and power generation mode of solar energy-air energy injection-compression compound cycle;

[0025] Mode 8: The compressor, the fan of the finned heat exchanger 1, the fluorine pump, the electronic expansion valve, the three-way valve 1, the three-way valve 2, and the chilled water circulation pump are turned on, and the system operates in a combined cooling and power generation mode of the solar energy-air energy injection-compression compound cycle;

[0026] Mode nine, the compressor, fluorine pump, electronic expansion valve, three-way valve one, three-way valve two, hot water circulation pump, and chilled water circulation pump are turned on, and the system operates in a machine-pump joint drive solar injection-compression compound cycle cogeneration mode.

[0027] Beneficial effects of the present invention:

[0028] The embodiment of the present invention can make full use of renewable energy sources such as solar energy and air energy, realize the complementarity between solar energy and air energy, and achieve high utilization rate of renewable energy in the system;

[0029] The system of the embodiment of the present invention can meet the diversified energy demand of cooling, heating and electricity;

[0030] The embodiment of the present invention can realize the free switching of various operation modes of the system according to the outdoor solar energy and air energy heat source conditions, and the system energy supply is reliable and stable;

[0031] The embodiment of the present invention can combine the ejector refrigeration technology with the multi-source coupled heat pump technology, and the thermodynamic cycle process is improved, which can greatly reduce the throttling loss and superheating loss of the traditional steam compression cycle process, and improve the compressor efficiency and system energy efficiency;

[0032] The system of the embodiment of the present invention is self-sufficient in production capacity, and the system is highly efficient, energy-saving, low-carbon, and has low operating costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the principle of a PVT-air energy injection-compression composite heat pump combined cooling, heating and power generation system driven by a machine and pump according to an embodiment of the present invention;

[0034] Figure 2 This is a schematic diagram of the principle of a fluorine pump driven solar evaporation-condensation cycle cogeneration mode according to an embodiment of the present invention;

[0035] Figure 3 It is a schematic diagram of the principle of a fluorine pump driven air energy jet refrigeration cycle combined cooling and power generation mode and a fluorine pump driven solar energy-air energy jet refrigeration cycle combined cooling, heating and power generation mode according to an embodiment of the present invention;

[0036] Figure 4 Schematic diagrams of the principles of a compressor-driven air energy injection-compression combined cycle cogeneration mode, a compressor-driven air energy injection-compression combined cycle cogeneration mode, and a compressor-driven injection-compression combined cycle cogeneration mode with condensation heat as a heat source according to an embodiment of the present invention;

[0037] Figure 5 It is a schematic diagram of the principles of the pump-driven solar-air-energy injection-compression compound cycle cogeneration mode, the machine-pump-driven solar-air-energy injection-compression compound cycle cogeneration mode, and the machine-pump-driven solar-energy injection-compression compound cycle cogeneration mode of the machine embodiments of the present invention.

[0038] Figure markings: 1-compressor, 2-steam ejector, 3-finned heat exchanger one, 4-hot water heat exchanger, 5-liquid reservoir, 6-fluorine pump, 7-focusing PVT array, 8-two-phase ejector, 9-gas-liquid separator, 10-electronic expansion valve, 11-finned heat exchanger two, 12-chilled water heat exchanger, 13-three-way valve one, 14-three-way valve two, 15-three-way valve three, 16-three-way valve four, 17-check valve one, 18-check valve two, 19-check valve three, 20-check valve four, 21-check valve five, 22-hot water circulation pump, 23-chilled water supply pump, 24-DC converter, 25-AC / DC inverter. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] like Figure 1 As shown, in this embodiment, a machine-pump-coupled PVT-air energy injection-compression composite heat pump cogeneration system includes a refrigerant system, a hot water system, a chilled water system, and a power supply system.

[0041] The refrigerant system mainly consists of a fluorine pump driven PVT-air energy injection refrigeration cycle system and a compressor driven PVT-air energy injection-compression compound cycle system;

[0042] The fluorine pump driven PVT-air energy injection refrigeration cycle system is mainly composed of a steam ejector 2, a finned heat exchanger 1 3, a hot water heat exchanger 4, a liquid storage tank 5, a fluorine pump 6, a focusing type PVT array 7, a gas-liquid separator 9, an electronic expansion valve 10, a finned heat exchanger 2 11, a chilled water heat exchanger 12, a three-way valve 2 14, a three-way valve 3 15, a three-way valve 4 16, a check valve 2 18, a check valve 3 19, and a check valve 5 21 connected via a refrigerant pipeline;

[0043] The compressor driven PVT-air energy injection-compression compound cycle system is mainly composed of a compressor 1, a finned heat exchanger 1 3, a hot water heat exchanger 4, a two-phase ejector 8, a gas-liquid separator 9, an electronic expansion valve 10, a finned heat exchanger 2 11, a chilled water heat exchanger 12, a three-way valve 1 13, a three-way valve 3 15, a three-way valve 4 16, and a one-way valve 4 20 connected via a refrigerant pipeline;

[0044] The hot water system is mainly composed of a hot water heat exchanger 4 and a hot water circulation pump 22 connected via a water pipeline;

[0045] The chilled water system is mainly composed of a chilled water heat exchanger 12 and a chilled water circulation pump 23 connected via a water pipeline;

[0046] The power supply system is mainly composed of a concentrating PVT array 7, a DC converter 24, and an AC / DC inverter 25 connected via a circuit.

[0047] In this embodiment, by controlling the opening and closing of the compressor 1, the fan of the finned heat exchanger 1 3, the fluorine pump 6, the electronic expansion valve 10, the fan of the finned heat exchanger 2 11, the three-way valve 1 13, the three-way valve 2 14, the three-way valve 3 15, the three-way valve 4 16, the hot water circulation pump 22, and the chilled water circulation pump 23, the system can realize the free switching of various operation modes, thereby realizing diversified energy output of cold, heat and electricity, and using one machine for multiple purposes.

[0048] (1) When the solar radiation intensity is high, the ambient temperature is low, and there is only a demand for thermal power, the system runs the fluorine pump driven solar evaporation-condensation cycle cogeneration mode, and the fluorine pump 6 and the hot water circulation pump 22 are turned on. Figure 2 As shown, the working principle is as follows: the liquid refrigerant in the liquid storage tank 5 is pumped by the fluorine pump 6 to the concentrating PVT array 7 to absorb solar energy and boil into superheated gaseous refrigerant, and then enters the hot water heat exchanger 4 through the three-way valve 2 14, the one-way valve 3 19, and the finned heat exchanger 1 3 to dissipate heat into the circulating water, and is condensed into liquid refrigerant, and then enters the liquid storage tank 5. Driven by the hot water circulation pump 22, the circulating water enters the hot water heat exchanger 4 to absorb heat, and thus circulates and is continuously heated. In addition, the concentrating PVT array 7 converts solar energy into direct current electricity, and converts it into a DC 750V direct current voltage through the DC converter 24 for use in the system. If the power generated by the concentrating PVT array 7 is greater than the power consumption of the system, the surplus power is connected to the grid through the AC / DC inverter 25; if the power generated by the concentrating PVT array 7 is less than the power consumption of the system, the grid is converted into a DC 750V direct current voltage through the AC / DC inverter 25 for use in the system.

[0049] (2) When the solar radiation intensity is high, the ambient temperature is low, and there is only a demand for cold electricity energy, the system runs the fluorine pump driven air energy injection refrigeration cycle cold power cogeneration mode, and the fan of the finned heat exchanger 1 3, the fluorine pump 6, the electronic expansion valve 10, the three-way valve 2 14, the three-way valve 3 15, the three-way valve 4 16, and the chilled water circulation pump 23 are turned on. At this time, if Figure 3 As shown, the working principle is as follows: the liquid refrigerant in the liquid storage tank 5 is pumped by the fluorine pump 6 to the concentrating PVT array 7 to absorb solar energy and boil into superheated gaseous refrigerant, and then enters the high-pressure end of the steam ejector 2 through the three-way valve 14 to inject low-pressure gas and mix with it, and then enters the finned heat exchanger 1 3 through the one-way valve 18 to dissipate heat into the air, and is condensed into liquid refrigerant and then divided into two paths, one path passes through the hot water heat exchanger 4 and the liquid storage tank 5 and returns to the fluorine pump 6; the other path passes through the three-way valve 15 and the gas-liquid separator 9 to enter the electronic expansion valve 10 to throttle into gas-liquid two-phase refrigerant, and enters the chilled water heat exchanger 12 through the finned heat exchanger 11 to absorb the heat of the circulating water and boil into superheated gaseous refrigerant, and then passes through the three-way valve 4 16 and the one-way valve 5 21 back to the low-pressure inlet end of the steam ejector to be injected. Driven by the chilled water circulation pump 23, the circulating water enters the chilled water heat exchanger 12 to dissipate heat, and is continuously cooled by this circulation. In addition, the concentrating PVT array 7 converts solar energy into DC power, and converts it into a DC 750V DC voltage through the DC converter 24 for the system. If the power generated by the concentrating PVT array 7 is greater than the power consumption of the system, the surplus power is connected to the grid through the AC-DC inverter 25; if the power generated by the concentrating PVT array 7 is less than the power consumption of the system, the grid is converted into a DC 750V DC voltage through the AC-DC inverter 25 for the system.

[0050] (3) When the solar radiation intensity is high, the ambient temperature is low, and there is a demand for cooling, heating and power energy, the system runs the fluorine pump to drive the solar energy-air energy jet refrigeration cycle cooling, heating and power cogeneration mode, and the fluorine pump 6, electronic expansion valve 10, three-way valve 2 14, three-way valve 3 15, three-way valve 4 16, and chilled water circulation pump 23 are turned on. At this time, if Figure 3As shown, the working principle is as follows: the liquid refrigerant in the liquid storage tank 5 is pumped by the fluorine pump 6 to the concentrating PVT array 7 to absorb solar energy and boil into superheated gaseous refrigerant, and then enters the high-pressure end of the steam ejector 2 through the three-way valve 14 to inject low-pressure gas and mix with it, and then passes through the one-way valve 18 and the fin-type heat exchanger 1 3 to enter the hot water heat exchanger 4 to dissipate heat to the circulating water, and is condensed into liquid refrigerant and then divided into two paths, one of which is returned to the fluorine pump 6 through the liquid storage tank 5; the other is throttled to a gas-liquid two-phase refrigerant through the three-way valve 3 15 and the gas-liquid separator 9 into the electronic expansion valve 10, and then enters the chilled water heat exchanger 12 through the fin-type heat exchanger 11 to absorb the heat of the circulating water and boil into superheated gaseous refrigerant, and then passes through the three-way valve 4 16 and the one-way valve 5 21 back to the low-pressure inlet end of the steam ejector to be injected. Driven by the hot water circulation pump 22, the circulating water enters the hot water heat exchanger 4 to absorb heat, and is continuously heated by this circulation; driven by the chilled water circulation pump 23, the circulating water enters the chilled water heat exchanger 12 to dissipate heat, and is continuously cooled by this circulation. In addition, the concentrating PVT array 7 converts solar energy into direct current electricity, and converts it into a DC 750V direct current voltage through the DC converter 24 for use by the system. If the power generated by the concentrating PVT array 7 is greater than the power consumption of the system, the surplus power is connected to the grid through the AC / DC inverter 25; if the power generated by the concentrating PVT array 7 is less than the power consumption of the system, the grid is converted into a DC 750V direct current voltage through the AC / DC inverter 25 for use by the system.

[0051] (4) When the solar radiation intensity is low, the ambient temperature is high, and there is only a demand for thermal power, the system operates in a compressor-driven air energy injection-compression combined cycle cogeneration mode, and the compressor 1, the electronic expansion valve 10, the fan of the finned heat exchanger 11, and the hot water circulation pump 22 are turned on. Figure 4As shown, the working principle is as follows: the high-temperature and high-pressure gaseous refrigerant at the outlet of the compressor 1 enters the hot water heat exchanger 4 through the three-way valve 13, the one-way valve 4 20, and the finned heat exchanger 3 to dissipate the heat into the circulating water, and after being condensed into liquid refrigerant, enters the high-pressure inlet end of the two-phase ejector 8 through the three-way valve 3 15 to eject the low-pressure gas and then become a gas-liquid two-phase refrigerant and enter the gas-liquid separator 9 to be separated into two paths, one path is the gaseous refrigerant returning to the compressor 1, and the other path is the liquid refrigerant throttled by the electronic expansion valve 10 to become a gas-liquid two-phase refrigerant and then enters the finned heat exchanger 11 to absorb air energy and boil to become a superheated gaseous refrigerant, and then enters the two-phase ejector 8 through the chilled water heat exchanger 12 and the three-way valve 4 16 to be ejected. Driven by the hot water circulation pump 22, the circulating water enters the hot water heat exchanger 4 to absorb heat, and thus circulates and is continuously heated. In addition, the concentrating PVT array 7 converts solar energy into direct current electricity, and converts it into a DC 750V direct current voltage through a DC converter 24 for use in the system. If the power generated by the concentrating PVT array 7 is greater than the power consumption of the system, the surplus power is connected to the grid through an AC / DC inverter 25; if the power generated by the concentrating PVT array 7 is less than the power consumption of the system, the grid is converted into a DC 750V direct current voltage through an AC / DC inverter 25 for use in the system.

[0052] (5) When the solar radiation intensity is low, the ambient temperature is high, and there is only a demand for cooling power energy, the system runs the compressor-driven air energy injection-compression compound cycle cooling and power cogeneration mode, and the compressor 1, the fan of the finned heat exchanger 3, the electronic expansion valve 10, and the chilled water circulation pump 23 are turned on. At this time, if Figure 4 As shown, the working principle is as follows: the high-temperature and high-pressure gaseous refrigerant at the outlet of the compressor 1 passes through the three-way valve 13, the one-way valve 4 20, and enters the finned heat exchanger 13 to dissipate heat to the outdoor air, and after being condensed into liquid refrigerant, it passes through the hot water heat exchanger 4 and the three-way valve 3 15 to enter the high-pressure inlet end of the two-phase ejector 8 to eject low-pressure gas and then become gas-liquid two-phase refrigerant and enter the gas-liquid separator 9 to be separated into two paths, one path is gaseous refrigerant returning to the compressor 1, and the other path is liquid refrigerant. After being throttled to gas-liquid two-phase refrigerant by the electronic expansion valve 10, it enters the chilled water heat exchanger 12 through the finned heat exchanger 11 to absorb heat energy in the circulating water and boil to become superheated gaseous refrigerant, and then enters the two-phase ejector 8 through the three-way valve 4 16 to be ejected. The circulating water enters the chilled water heat exchanger 12 to dissipate heat under the drive of the chilled water circulation pump 23, and is continuously cooled in this cycle. In addition, the concentrating PVT array 7 converts solar energy into DC power and converts it into DC 750V voltage through the DC converter 24 for use in the system. If the power generated by the concentrating PVT array 7 is greater than the power consumption of the system, the surplus power is connected to the grid through the AC-DC inverter 25; if the power generated by the concentrating PVT array 7 is less than the power consumption of the system, the grid is converted into DC 750V voltage through the AC-DC inverter 25 for use in the system.

[0053] (6) When the solar radiation intensity is low, the ambient temperature is high, and there is a demand for cooling, heating and power energy, the system operates in a compressor-driven injection-compression combined cycle cooling, heating and power cogeneration mode with condensation heat as the heat source, and the compressor 1, electronic expansion valve 10, hot water circulation pump 22, and chilled water circulation pump 23 are turned on. At this time, if Figure 4 As shown, the working principle is as follows: the high-temperature and high-pressure gaseous refrigerant at the outlet of the compressor 1 enters the hot water heat exchanger 4 through the three-way valve 13, the one-way valve 4 20, and the finned heat exchanger 3 to dissipate the heat into the circulating water, and after being condensed into liquid refrigerant, enters the high-pressure inlet end of the two-phase ejector 8 through the three-way valve 3 15 to eject the low-pressure gas and become a gas-liquid two-phase refrigerant and enter the gas-liquid separator 9 to be separated into two paths, one path is the gaseous refrigerant returning to the compressor 1, and the other path is the liquid refrigerant after being throttled by the electronic expansion valve 10 to be a gas-liquid two-phase refrigerant, enters the chilled water heat exchanger 12 through the finned heat exchanger 11 to absorb the heat energy in the circulating water and boil to become a superheated gaseous refrigerant, and then enters the two-phase ejector 8 through the three-way valve 4 16 to be ejected. The circulating water enters the hot water heat exchanger 4 to absorb heat under the drive of the hot water circulating pump 22, and is continuously heated by this cycle; the circulating water enters the chilled water heat exchanger 12 to dissipate heat under the drive of the chilled water circulating pump 23, and is continuously cooled by this cycle. In addition, the concentrating PVT array 7 converts solar energy into direct current electricity, and converts it into a DC 750V direct current voltage through a DC converter 24 for use in the system. If the power generated by the concentrating PVT array 7 is greater than the power consumption of the system, the surplus power is connected to the grid through an AC / DC inverter 25; if the power generated by the concentrating PVT array 7 is less than the power consumption of the system, the grid is converted into a DC 750V direct current voltage through an AC / DC inverter 25 for use in the system.

[0054] (7) When the quality of solar energy and air energy heat sources is close, and only thermal power energy is required, the system operates in a pump-driven solar energy-air energy injection-compression combined cycle cogeneration mode, and the compressor 1, fluorine pump 6, electronic expansion valve 10, fan of finned heat exchanger 2 11, three-way valve 1 13, three-way valve 2 14, and hot water circulation pump 22 are turned on. At this time, if Figure 5As shown, the working principle is as follows: the liquid refrigerant in the liquid storage tank 5 is pumped by the fluorine pump 6 to the concentrating PVT array 7 to absorb solar energy and boil into superheated gaseous refrigerant, and then enters the high-pressure end of the steam ejector 2 through the three-way valve 14 to inject low-pressure gas and mix with it, and then passes through the one-way valve 18 and the finned heat exchanger 3, and enters the hot water heat exchanger 4 to dissipate heat into the circulating water, and is condensed into liquid refrigerant and then divided into two paths, one of which is returned to the fluorine pump 6 through the liquid storage tank 5. The other path enters the two-phase ejector 8 through the three-way valve 15 to eject low-pressure gas and then turns into gas-liquid two-phase refrigerant, and then passes through the gas-liquid separator 9 to separate into two paths, one path is gaseous refrigerant returning to the compressor 1, and the other path is liquid refrigerant throttled by the electronic expansion valve 10 to become gas-liquid two-phase refrigerant, then enters the finned heat exchanger 2 11 to absorb air energy and boil to become superheated gaseous refrigerant, and then passes through the chilled water heat exchanger 12 and the three-way valve 4 16 back to the two-phase ejector 8 to be ejected. Driven by the hot water circulation pump 22, the circulating water enters the hot water heat exchanger 4 to absorb heat, and circulates in this way to be continuously heated. In addition, the concentrating PVT array 7 converts solar energy into direct current electricity, and converts it into a DC 750V direct current voltage through a DC converter 24 for use in the system. If the power generated by the concentrating PVT array 7 is greater than the power consumption of the system, the surplus power is connected to the grid through an AC / DC inverter 25; if the power generated by the concentrating PVT array 7 is less than the power consumption of the system, the grid is converted into a DC 750V direct current voltage through an AC / DC inverter 25 for use in the system.

[0055] (8) When the quality of solar energy and air energy heat sources is close, and only cold electricity energy is required, the system operates in a pump-driven solar energy-air energy injection-compression compound cycle cold power cogeneration mode, and the compressor 1, the fan of the finned heat exchanger 3, the fluorine pump 6, the electronic expansion valve 10, the three-way valve 1 13, the three-way valve 2 14, and the chilled water circulation pump 23 are turned on. At this time, if Figure 5As shown, the working principle is as follows: the liquid refrigerant in the liquid storage tank 5 is pumped by the fluorine pump 6 to the concentrating PVT array 7 to absorb solar energy and boil into superheated gaseous refrigerant, and then enters the high-pressure end of the steam ejector 2 through the three-way valve 14 to inject low-pressure gas and mix with it, and then enters the finned heat exchanger 1 3 through the one-way valve 18 to dissipate heat to the air, and is condensed into liquid refrigerant and then divided into two paths through the hot water heat exchanger 4, one path returns to the fluorine pump 6 through the liquid storage tank 5; the other path After entering the two-phase ejector 8 through the three-way valve 15 to eject low-pressure gas, it becomes a gas-liquid two-phase refrigerant, and then it is separated into two paths through the gas-liquid separator 9, one path is a gaseous refrigerant that returns to the compressor 1, and the other path is a liquid refrigerant that is throttled by the electronic expansion valve 10 to become a gas-liquid two-phase refrigerant, and then enters the chilled water heat exchanger 12 through the finned heat exchanger 11 to absorb the heat energy of the circulating water and boil to become a superheated gaseous refrigerant, and then returns to the two-phase ejector 8 through the three-way valve 4 16 to be ejected. The circulating water enters the chilled water heat exchanger 12 under the drive of the chilled water circulation pump 23 to dissipate heat, and is continuously cooled in this cycle. In addition, the concentrating PVT array 7 converts solar energy into direct current electricity, and converts it into a DC 750V direct current voltage through a DC converter 24 for use in the system. If the power generated by the concentrating PVT array 7 is greater than the power consumption of the system, the surplus power is connected to the grid through an AC / DC inverter 25; if the power generated by the concentrating PVT array 7 is less than the power consumption of the system, the grid is converted into a DC 750V direct current voltage through an AC / DC inverter 25 for use in the system.

[0056] (9) When the quality of solar energy and air energy heat sources is close and there is a demand for cooling, heating and power energy, the system operates in a pump-driven solar injection-compression compound cycle cooling, heating and power cogeneration mode, and the compressor 1, fluorine pump 6, electronic expansion valve 10, three-way valve 1 13, three-way valve 2 14, hot water circulation pump 22, and chilled water circulation pump 23 are turned on. At this time, if Figure 5As shown, the working principle is as follows: the liquid refrigerant in the liquid storage tank 5 is pumped by the fluorine pump 6 to the concentrating PVT array 7 to absorb solar energy and boil into superheated gaseous refrigerant, and then enters the high-pressure end of the steam ejector 2 through the three-way valve 14 to inject low-pressure gas and mix with it, and then enters the hot water heat exchanger 4 through the one-way valve 18 and the finned heat exchanger 3 to dissipate heat into the circulating water, and is condensed into liquid refrigerant and then divided into two paths, one of which is returned to the fluorine pump 6 through the liquid storage tank 5; the other One path enters the two-phase ejector 8 through the three-way valve 15 to eject low-pressure gas and then turns into gas-liquid two-phase refrigerant, and then passes through the gas-liquid separator 9 to separate into two paths, one path is gaseous refrigerant returning to the compressor 1, and the other path is liquid refrigerant throttled by the electronic expansion valve 10 to become gas-liquid two-phase refrigerant, and then enters the chilled water heat exchanger 12 through the finned heat exchanger 11 to absorb the heat energy of the circulating water and boil to become superheated gaseous refrigerant, and then returns to the two-phase ejector 8 through the three-way valve 4 16 to be ejected. Driven by the hot water circulation pump 22, the circulating water enters the hot water heat exchanger 4 to absorb heat, and thus circulates and is continuously heated; driven by the chilled water circulation pump 23, the circulating water enters the chilled water heat exchanger 12 to dissipate heat, and thus circulates and is continuously cooled. In addition, the concentrating PVT array 7 converts solar energy into direct current electricity, and converts it into a DC 750V direct current voltage through a DC converter 24 for use in the system. If the power generated by the concentrating PVT array 7 is greater than the power consumption of the system, the surplus power is connected to the grid through an AC / DC inverter 25; if the power generated by the concentrating PVT array 7 is less than the power consumption of the system, the grid is converted into a DC 750V direct current voltage through an AC / DC inverter 25 for use in the system.

[0057] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the invention, and the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A PVT-air energy injection-compression composite heat pump combined cooling, heating and power generation system driven by a pump and a motor, characterized in that: The system includes a refrigerant system, a hot water system, a chilled water system, and a power supply system, wherein: The refrigerant system is mainly composed of a fluorine pump driven PVT-air energy injection refrigeration cycle system and a compressor driven PVT-air energy injection-compression compound cycle system; The fluorine pump driven PVT-air energy injection refrigeration cycle system mainly comprises a steam injector (2), a finned heat exchanger 1 (3), a hot water heat exchanger (4), a liquid storage device (5), a fluorine pump (6), a concentrated PVT array (7), a gas-liquid separator (9), an electronic expansion valve (10), a finned heat exchanger 2 (11), a chilled water heat exchanger (12), a three-way valve 2 (14), a three-way valve 3 (15), a three-way valve 4 (16), a check valve 2 (18), a check valve 3 (19), and a check valve 5 (21). The fluorine pump (6) is sequentially connected to the concentrated PVT array (7) and the three-way valve 2 (14) and then splits into two paths, one of which is connected to the The one-way valve three (19); the other is connected to the high-pressure inlet end of the steam ejector (2) and its outlet is connected to the one-way valve two (18). The above two paths are combined and connected to the finned heat exchanger one (3) and the hot water heat exchanger (4) in sequence, and then separated into two paths, one of which is connected to the inlet of the fluorine pump (6) through the liquid storage tank (5); the other is connected to the low-pressure inlet section of the steam ejector (2) in sequence through the three-way valve three (15), the gas-liquid separator (9), the electronic expansion valve (10), the finned heat exchanger two (11), the chilled water heat exchanger (12), the three-way valve four (16), and the one-way valve five (21); The compressor driven PVT-air energy injection-compression compound cycle system mainly comprises a compressor (1), a finned heat exchanger 1 (3), a hot water heat exchanger (4), a two-phase ejector (8), a gas-liquid separator (9), an electronic expansion valve (10), a finned heat exchanger 2 (11), a chilled water heat exchanger (12), a three-way valve 1 (13), a three-way valve 3 (15), a three-way valve 4 (16), and a one-way valve 4 (20). The compressor (1) is sequentially connected to the three-way valve 1 (13), the one-way valve 4 (20), the finned heat exchanger 2 (11), the chilled water heat exchanger 2 (12), a three-way valve 1 (13), a three-way valve 3 (15), a three-way valve 4 (16), and a one-way valve 4 (20). After the heat exchanger 1 (3), the hot water heat exchanger (4), the three-way valve 3 (15), the two-phase ejector (8), and the gas-liquid separator (9), two paths are separated, one path is separated through the top of the gas-liquid separator (9) and connected to the inlet of the compressor (1); the other path is separated through the bottom of the gas-liquid separator (9) and connected in sequence to the electronic expansion valve (10), the finned heat exchanger 2 (11), the chilled water heat exchanger (12), the three-way valve 4 (16), and then connected to the low-pressure inlet of the two-phase ejector (8); The hot water system is mainly composed of a hot water heat exchanger (4) and a hot water circulation pump (22), and the water side of the hot water heat exchanger (4) is connected to the hot water circulation pump (22) via a water pipeline; The chilled water system is mainly composed of a chilled water heat exchanger (12) and a chilled water circulation pump (23), and the water side of the chilled water heat exchanger (12) is connected to the chilled water circulation pump (23) via a water pipeline; The power supply system is mainly composed of a concentrating PVT array (7), a DC converter (24), and an AC / DC inverter (25). The power supply system is divided into two routes, one route is connected to the concentrating PVT array (7) and the DC converter (24), and the other route is connected to the municipal power grid and the AC / DC inverter (25). The two routes are combined and connected to the compressor (1), the fan of the finned heat exchanger 1 (3), the fan of the finned heat exchanger 2 (11), the hot water circulation pump (22), and the chilled water circulation pump (23).

2. The PVT-air energy injection-compression composite heat pump combined cooling, heating and power generation system driven by a pump and a motor according to claim 1 is characterized in that: By controlling the opening and closing of the compressor (1), the fan of the finned heat exchanger 1 (3), the fluorine pump (6), the electronic expansion valve (10), the fan of the finned heat exchanger 2 (11), the three-way valve 1 (13), the three-way valve 2 (14), the three-way valve 3 (15), the three-way valve 4 (16), the hot water circulation pump (22), and the chilled water circulation pump (23), the system can realize the switching of the following 9 operation modes: Mode 1: the fluorine pump (6) and the hot water circulation pump (22) are turned on, and the system operates in a fluorine pump-driven solar evaporation-condensation cycle cogeneration mode; Mode 2: The fan of the finned heat exchanger 1 (3), the fluorine pump (6), the electronic expansion valve (10), the three-way valve 2 (14), the three-way valve 3 (15), the three-way valve 4 (16), and the chilled water circulation pump (23) are turned on, and the system operates in a fluorine pump-driven air energy injection refrigeration cycle cogeneration mode; Mode three, the fluorine pump (6), the electronic expansion valve (10), the three-way valve two (14), the three-way valve three (15), the three-way valve four (16), and the chilled water circulation pump (23) are turned on, and the system operates in a fluorine pump-driven solar-air jet refrigeration cycle combined heat and power generation mode; Mode 4: the compressor (1), the electronic expansion valve (10), the fan of the finned heat exchanger 2 (11), and the hot water circulation pump (22) are turned on, and the system operates in a compressor-driven air energy injection-compression combined cycle cogeneration mode; Mode 5: the compressor (1), the fan of the finned heat exchanger 1 (3), the electronic expansion valve (10), and the chilled water circulation pump (23) are turned on, and the system operates in a compressor-driven air energy injection-compression compound cycle cooling and power cogeneration mode; Mode 6: the compressor (1), the electronic expansion valve (10), the hot water circulation pump (22), and the chilled water circulation pump (23) are turned on, and the system operates in a compressor-driven injection-compression compound cycle cogeneration mode using condensation heat as a heat source; Mode 7: the compressor (1), the fluorine pump (6), the electronic expansion valve (10), the fan of the finned heat exchanger 2 (11), the three-way valve 1 (13), the three-way valve 2 (14), and the hot water circulation pump (22) are turned on, and the system operates in a machine-pump joint drive solar-air energy injection-compression compound cycle cogeneration mode; Mode 8: the compressor (1), the fan of the finned heat exchanger 1 (3), the fluorine pump (6), the electronic expansion valve (10), the three-way valve 1 (13), the three-way valve 2 (14), and the chilled water circulation pump (23) are turned on, and the system operates in a machine-pump joint drive solar energy-air energy injection-compression compound cycle cooling and power cogeneration mode; Mode nine, the compressor (1), the fluorine pump (6), the electronic expansion valve (10), the three-way valve one (13), the three-way valve two (14), the hot water circulation pump (22), and the chilled water circulation pump (23) are turned on, and the system operates in a machine-pump-coupled solar injection-compression compound cycle cogeneration mode.

3. The PVT-air energy injection-compression composite heat pump combined cooling, heating and power generation system driven by a pump and a motor according to claim 1 or 2, characterized in that: The types of compressors (1) include rotor type, scroll type and piston type.

4. The PVT-air energy injection-compression composite heat pump combined cooling, heating and power generation system driven by a pump and a motor according to claim 1 or 2, characterized in that: The types of the hot water heat exchanger (4) and the chilled water heat exchanger (12) include flat plate type, spiral plate type, plate fin type, immersed spiral tube type, sleeve type, and shell and tube type.

5. The PVT-air energy injection-compression composite heat pump combined cooling, heating and power generation system driven by a pump and a motor according to claim 1 or 2, characterized in that: The electronic expansion valve (10) may be replaced by a thermal expansion valve or a capillary tube.

6. The PVT-air energy injection-compression composite heat pump combined cooling, heating and power generation system driven by a pump and a motor according to claim 1 or 2, characterized in that: The types of solar cell elements of the concentrating PVT array (7) include single crystal silicon, polycrystalline silicon, copper indium gallium selenide, gallium arsenide, cadmium telluride, and perovskite.

7. The PVT-air energy injection-compression composite heat pump combined cooling, heating and power generation system driven by a pump and a motor according to claim 1 or 2, characterized in that: The motors of the compressor (1), the fan of the finned heat exchanger 1 (3), the fluorine pump (6), the fan of the finned heat exchanger 2 (11), the hot water circulation pump (22), and the chilled water circulation pump (23) are DC-driven, and their types include brushless DC, brushed DC, and permanent magnet DC.

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