Solar flash jet heat pump dehumidification and drying system and operation method thereof

Abstract

The present invention discloses a solar flash jet heat pump dehumidification and drying system and an operation method thereof, comprising a fan, which is sequentially connected to a solar air collector, a first partition, a condenser, and a drying chamber, the drying chamber is respectively connected to a second partition and an evaporator, the second partition and the evaporator are both connected to a third heat exchanger, the third heat exchanger is connected to the condenser, the condenser is connected to a refrigerant flow path, the refrigerant flow path is respectively connected to a solar heat storage circuit and an oil circuit, a temperature and humidity sensor is arranged in the drying chamber, the first partition, the second partition, and the temperature and humidity sensor are all connected to a control unit, and the system has a jet compression heating mode and a solar flash jet heating mode, thereby improving the drying effect and dehumidification effect of the drying chamber.

Description

Technical Field

[0001] The invention belongs to the technical field of solar heat pumps, and in particular relates to a solar flash jet heat pump dehumidification and drying system, and also relates to an operation method of the solar flash jet heat pump dehumidification and drying system. Background Art

[0002] With the progress of society and the development of economy, drying system has played an increasingly important role in the fields of industry, agriculture, biopharmaceuticals, etc. Traditional drying usually adopts open-air natural drying method, which is inefficient, occupies a large area, is time-consuming and labor-intensive, and is easily affected by climatic conditions such as showers and plum rains, making it difficult to ensure the quality of dried food or agricultural and sideline products. On the other hand, the artificial drying industry is an industry with high energy consumption, relying on the heat provided by fossil fuels, which seriously pollutes the environment. In today's energy crisis and environmental crisis, whether from the perspective of energy saving or environmental protection, the use of new renewable energy such as solar energy to replace conventional energy and improve energy utilization is an inevitable trend in the development of the dehumidification and drying industry.

[0003] Solar energy is an environmentally friendly, low-grade energy source. The introduction of a solar flash jet heat pump system, using an ejector as the device to complete the refrigerant compression process, can replace the compressor in a traditional refrigeration system when the solar irradiance is sufficient, thus reducing the energy consumption of the heat pump system. However, when the solar irradiance is insufficient, the heating performance of the unit will fluctuate and decay, resulting in a poor drying effect and being unfavorable for dehumidification operations. Summary of the invention

[0004] The purpose of the present invention is to provide a solar flash jet heat pump dehumidification and drying system, which solves the problem of poor drying effect and poor dehumidification effect of the existing heat pump drying system.

[0005] Another object of the present invention is to provide an operating method of a solar flash jet heat pump dehumidification and drying system.

[0006] The technical solution adopted by the present invention is a solar flash jet heat pump dehumidification and drying system, which includes a fan, which is connected to a solar air collector, a first partition, a condenser, and a drying chamber in sequence. The drying chamber is respectively connected to a second partition and an evaporator. The second partition and the evaporator are both connected to a third heat exchanger. The third heat exchanger is connected to the condenser. The condenser is connected to a refrigerant flow path. The refrigerant flow path is respectively connected to a solar heat storage circuit and an oil circuit. A temperature and humidity sensor is arranged in the drying chamber. The first partition, the second partition, and the temperature and humidity sensor are all connected to a control unit.

[0007] The present invention is also characterized in that:

[0008] The refrigerant flow path includes a compressor, which is connected to an oil separator, a filter, and a condenser in sequence. The condenser is respectively connected to a first solenoid valve and a second solenoid valve, the first solenoid valve is connected to a working fluid pump, the working fluid pump is connected to a solar thermal storage circuit, the solar thermal storage circuit and the second solenoid valve are both connected to an ejector, the ejector is respectively connected to a gas-liquid separator and a second heat exchanger, the gas-liquid separator is respectively connected to the second heat exchanger, a third solenoid valve, and a fourth solenoid valve, the second heat exchanger is respectively connected to an expansion valve and a compressor, the expansion valve is connected to the compressor through an evaporator, the third solenoid valve is connected to the first heat exchanger, the first heat exchanger is connected to an inlet of the condenser, the fourth solenoid valve is connected to the compressor, and the first solenoid valve, the second solenoid valve, the third solenoid valve, and the fourth solenoid valve are all connected to a control unit.

[0009] The oil circuit includes a sixth solenoid valve, which is respectively connected to the compressor and the first heat exchanger, the first heat exchanger is connected to the oil outlet of the oil separator, and the sixth solenoid valve is connected to the control unit.

[0010] The solar thermal storage circuit includes a solar generator, which is respectively connected to a water pump, a fifth solenoid valve, a working fluid pump, and an ejector. The water pump and the fifth solenoid valve are both connected to a hot water storage tank, which is also connected to both ends of a solar collector, and the water pump is connected to a control unit.

[0011] A first temperature sensor and a first pressure sensor are arranged between the oil separator and the condenser, a second temperature sensor and a second pressure sensor are arranged between the condenser and the working fluid pump, a third pressure sensor and a third temperature sensor are arranged between the working fluid pump and the solar generator, and the first temperature sensor, the first pressure sensor, the second temperature sensor, the second pressure sensor, the third pressure sensor, and the third temperature sensor are all connected to the control unit.

[0012] Another technical solution adopted by the present invention is an operation method of a solar flash jet heat pump dehumidification and drying system. When the solar radiation intensity is ≥400W / m 2 When the solar radiation intensity is less than 400W / m 2 Or when there is no solar radiation, the injection compression heating mode is operated.

[0013] The present invention is also characterized in that:

[0014] The specific process of operating the solar flash jet heating mode is as follows:

[0015] The first solenoid valve, the third solenoid valve, the fifth solenoid valve and the sixth solenoid valve are opened, the second solenoid valve and the fourth solenoid valve are closed, the gas phase outlet of the gas-liquid separator is a high-pressure saturated gas refrigerant, the high-pressure saturated gas refrigerant absorbs the waste heat of the lubricating oil through the first heat exchanger and directly enters the condenser to heat the air, and forms a high-pressure saturated / supercooled liquid after the condenser, and the high-pressure liquid refrigerant after the working fluid pump absorbs heat through the solar generator to become a high-pressure gas-liquid two-phase mixed refrigerant, and enters the ejector as a working fluid and then enters the gas-liquid separator for circulation;

[0016] The control unit calculates the relative humidity u at the temperature according to the temperature and humidity data collected by the temperature and humidity sensor according to formula (1);

[0017] u=(e / es)×100%(1)

[0018] In formula (1), e is the vapor pressure of water in the air, and es is the saturated vapor pressure at the same temperature;

[0019] The control unit compares the relative humidity u with the preset relative humidity u0. When the relative humidity value u is less than the preset relative humidity value u0, the control unit controls the opening of the first partition and the second partition to be reduced. When the relative humidity value u is greater than the preset relative humidity value u0, the control unit controls the opening of the first partition and the second partition to be increased.

[0020] The control unit obtains the unit heat supply Q_out of the condenser and the enthalpy value h_in of the outlet of the working fluid pump according to the thermodynamic equation of the refrigerant, and then calculates the dryness value x of the refrigerant at the outlet of the solar generator by using the pressure and temperature data collected by the first temperature sensor, the first pressure sensor, the second temperature sensor, the second pressure sensor and the third temperature sensor and the third pressure sensor at the outlet of the working fluid pump;

[0021] The control unit compares the dryness value x with the preset dryness value x0. When the dryness value x is less than the preset dryness value x0, the control unit controls the water pump to increase the speed; when the dryness value x is greater than the preset dryness value x0, the control unit controls the water pump to decrease the speed.

[0022] The expression of the dryness value x of the refrigerant at the outlet of the solar generator is:

[0023] x=(h_out-h_f) / (h_s-h_f)(2)

[0024] In formula (2), h_f is the enthalpy of saturated water, h_s is the enthalpy of saturated steam, and h_out is the enthalpy value at the outlet of the solar generator;

[0025] h_out = h_in + Φ×(h_out - h_in) (3)

[0026] In formula (3), h_in is the enthalpy value of the working fluid pump outlet, Φ is the solar energy input ratio;

[0027] Φ=Q_in / Q_out(4)

[0028] In formula (4), Q_in is the solar energy input per unit time, and Q_out is the heat supply of the condenser per unit time.

[0029] The specific process of operating the injection compression heating mode is as follows:

[0030] The solar thermal storage circuit is closed, the first solenoid valve, the third solenoid valve, the fifth solenoid valve and the sixth solenoid valve are closed, the second solenoid valve and the fourth solenoid valve are opened, the saturated gaseous refrigerant at the gas phase outlet of the gas-liquid separator enters the air supply port of the compressor and is compressed by the compressor to form a high-temperature and high-pressure superheated gaseous refrigerant that enters the condenser to form a superheated gaseous refrigerant that enters the nozzle of the ejector as a primary fluid and expands to become a gas-liquid two-phase mixed refrigerant. The gas-liquid two-phase mixed refrigerant is mixed with part of the superheated gaseous refrigerant coming out of the evaporator in the mixing section of the ejector and then After being pressurized by the diffuser section of the ejector to become a gas-liquid two-phase mixed refrigerant, it is discharged from the ejector. The gas-liquid two-phase mixed refrigerant at the ejector outlet enters the gas-liquid separator for gas-liquid separation. The saturated liquid refrigerant in the liquid phase of the gas-liquid separator is cooled by the second heat exchanger, throttled and depressurized by the expansion valve, and cooled before entering the evaporator to absorb heat and evaporate to become a superheated gaseous refrigerant. The superheated gaseous refrigerant at the evaporator outlet is divided into two paths, one path enters the air intake port of the compressor, and the other path enters the secondary flow port of the ejector after being heated by the heat exchanger, completing the circulation of the refrigerant flow path;

[0031] The opening adjustment process of the first baffle and the second baffle is the same as that in the solar flash jet heating mode;

[0032] The control unit controls the water pump to shut down.

[0033] The beneficial effects of the present invention are:

[0034] (1) The solar flash jet heat pump dehumidification and drying system of the present invention introduces an oil separator and a heat exchanger to achieve efficient waste heat utilization and increase heating capacity, and introduces two solar energy utilization methods to achieve efficient utilization of solar energy, an environmentally friendly energy source;

[0035] (2) The solar flash jet heat pump dehumidification and drying system of the present invention is convenient for switching between the solar flash jet heat pump system and the jet compression heat pump system by setting six solenoid valves, thereby improving the drying effect; by setting two sets of partitions, it is convenient for switching between dehumidification and drying modes in response to different weather conditions, thereby improving the stability of system operation and the dehumidification effect; by using three heat exchangers, the waste heat of the system is reused, energy loss is reduced, and system performance is optimized;

[0036] (3) The solar flash jet heat pump dehumidification and drying system of the present invention adopts R717 refrigerant, which is easy to separate from oil and improves the thermodynamic performance of the system and the economy and reliability of operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a structural schematic diagram of the solar flash jet heat pump dehumidification and drying system of the present invention;

[0038] Figure 2 This is a control principle diagram of the operation method of the solar flash jet heat pump dehumidification and drying system of the present invention.

[0039] In the figure, 1. compressor, 2. oil separator, 3. condenser, 4. working fluid pump, 5. solar generator, 6. ejector, 7. gas-liquid separator, 8. first heat exchanger, 9. second heat exchanger, 10. expansion valve, 11. evaporator, 12. solar collector, 13. hot water storage tank, 14. water pump, 15. fan, 16. solar air collector, 17. drying chamber, 18. third heat exchanger, 19. filter, 20. first solenoid valve, 21. second solenoid valve, 22. third solenoid valve, 23. fourth solenoid valve, 24. fifth solenoid valve, 25. sixth solenoid valve, 26. first partition, 27. second partition, 28. first temperature sensor, 29. first pressure sensor, 30. second temperature sensor, 31. second pressure sensor, 32. third temperature sensor, 33. third pressure sensor, 34. temperature and humidity sensor. DETAILED DESCRIPTION

[0040] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0041] Example 1

[0042] The solar flash jet heat pump dehumidification and drying system of the present invention has a structure as follows Figure 1As shown, the fan 15 includes a solar air collector 16, a first partition 26, a condenser 3, and a drying chamber 17, the drying chamber 17 is used to dry items, and the inlet and outlet of the drying chamber 17 are provided with fans, the drying chamber 17 is respectively connected to the second partition 27 and the evaporator 11, the second partition 27 and the evaporator 11 are connected to the third heat exchanger 18, the inlet of the evaporator 11 is provided with a fan, the third heat exchanger 18 is connected to the condenser 3, the condenser 3 is connected to a refrigerant flow path, the refrigerant flow path is provided with R717 (ammonia) refrigerant, which is easy to separate from oil and has a high heat release coefficient. When the heating capacity is the same, the size of the ammonia compressor is the smallest, which improves the thermodynamic performance of the system and the economy and reliability of operation. The refrigerant flow paths are respectively connected There are a solar heat storage circuit and an oil circuit, in which oil is arranged, a temperature and humidity sensor 34 is arranged in the drying chamber 17, the first partition 26, the second partition 27, and the temperature and humidity sensor 34 are all connected to the control unit, the first partition 26 and the second partition 27 are both connected to the control unit through an electric actuator, specifically, there are two electric actuators, each of which includes a DC motor, the output end of the DC motor is connected to a ball screw, one of the ball screws is connected to the first partition 26, and the other ball screw is connected to the second partition 27, the control unit controls the DC motor to work, the DC motor drives the ball screw to rotate, thereby driving the first partition 26 and the second partition 27 to move, so as to adjust the opening, and the first partition 26 and the second partition 27 are both arranged on the pipeline.

[0043] The refrigerant flow path includes a compressor 1, which is sequentially connected to an oil separator 2, a filter 19, and a condenser 3. The oil separator 2 has the function of separating the refrigerant from the lubricating oil. The oil separator 2 has an inlet, a refrigerant outlet, and an oil outlet. The refrigerant outlet is connected to the filter 19, and the inlet is connected to the compressor 1. The condenser 3 is respectively connected to a first solenoid valve 20 and a second solenoid valve 21. The first solenoid valve 20 is connected to a working fluid pump 4, and the working fluid pump 4 is connected to a solar thermal storage circuit. The solar thermal storage circuit and the second solenoid valve 21 are both connected to an ejector 6. The ejector The gas-liquid separator 6 is connected to the gas-liquid separator 7 and the second heat exchanger 9 respectively. The gas-liquid separator 7 is connected to the second heat exchanger 9, the third solenoid valve 22 and the fourth solenoid valve 23 respectively. The second heat exchanger 9 is connected to the expansion valve 10 and the compressor 1 respectively. The expansion valve 10 is connected to the compressor 1 through the evaporator 11. The third solenoid valve 22 is connected to the first heat exchanger 8. The first heat exchanger 8 is connected to the inlet of the condenser 3. The fourth solenoid valve 23 is connected to the compressor 1. The first solenoid valve 20, the second solenoid valve 21, the third solenoid valve 22 and the fourth solenoid valve 23 are all connected to the control unit. In the compressor An oil separator is introduced after the compressor 1 to separate the lubricating oil in the high-pressure steam discharged from the compressor 1, so as to improve the heat transfer effect of the condenser 3 and the evaporator 11, and ensure the safe and efficient operation of the device. The compressor 1 has an air intake port, an exhaust port and an air supply port. The exhaust port is connected to the oil separator 2, the air supply port is connected to the fourth solenoid valve 23, and the air intake port is connected to the evaporator 11; all the gas-liquid two-phase mixed refrigerant from the outlet of the solar generator 5 or the condenser 3 in the ejector 6 is used as the primary fluid of the ejector 6, and its pressure is greater than the pressure of the secondary fluid from the outlet of the evaporator 11. ; The refrigerant gas at the outlet of the evaporator 11 is ejected by a primary fluid in the suction chamber of the ejector 6, mixed in the mixing chamber of the ejector 6, and pressurized in the diffusion chamber before entering the gas-liquid separator 7. The saturated gaseous refrigerant at the gas phase outlet of the gas-liquid separator 7 recovers the waste heat of the oil through the heat exchanger 8 and enters the condenser 3 directly without being connected to the compressor 1; the gas-liquid two-phase mixed refrigerant passes through the gas-liquid separator 7, so that the saturated liquid refrigerant passes through the heat exchanger 9 and the expansion valve 10 and then enters the evaporator 11, which increases the heat absorption per unit mass of the refrigerant in the evaporator, and is beneficial to reducing the size of the evaporator 11.

[0044] The oil circuit includes a sixth solenoid valve 25, which is respectively connected to the compressor 1 and the first heat exchanger 8, the first heat exchanger 8 is connected to the oil outlet of the oil separator 2, and the sixth solenoid valve 25 is connected to the control unit, that is, the oil returns to the compressor 1 from the oil outlet of the oil separator 2 through the first heat exchanger 8 and the sixth solenoid valve 25.

[0045] The solar thermal storage circuit includes a solar generator 5, which is respectively connected to a water pump 14, a fifth solenoid valve 24, a working fluid pump 4, and an ejector 6. The water pump 14 and the fifth solenoid valve 24 are both connected to a hot water storage tank 13. The hot water storage tank 13 is also connected to both ends of a solar thermal collector 12. The fifth solenoid valve 24 and the water pump 14 are both connected to a control unit. Specifically, the hot water storage tank 13 has four ports, namely, port a (low-temperature water outlet), port b (high-temperature water inlet), port c (high-temperature water outlet), and port d (low-temperature water inlet). Port a is connected to the inlet of the solar thermal collector 12, port b is connected to the outlet of the solar thermal collector 12, port c is connected to the water pump 14, and port d is connected to the fifth solenoid valve 24.

[0046] Example 2

[0047] On the basis of Example 1, a first temperature sensor 28 and a first pressure sensor 29 are arranged between the oil separator 2 and the condenser 3, a second temperature sensor 30 and a second pressure sensor 31 are arranged between the condenser 3 and the working fluid pump 4, and a third pressure sensor 33 and a third temperature sensor 32 are arranged between the working fluid pump 4 and the solar generator 5. The first temperature sensor 28, the first pressure sensor 29, the second temperature sensor 30, the second pressure sensor 31, the third temperature sensor 32, and the third pressure sensor 33 are all connected to the control unit.

[0048] The control unit is used to receive the pressure and temperature data collected by the first temperature sensor 28, the first pressure sensor 29, the second temperature sensor 30, the second pressure sensor 31, the third temperature sensor 32, and the third pressure sensor 33, and process the pressure and temperature data; the control unit is used to receive the temperature and humidity data collected by the temperature and humidity sensor 34, and process the temperature and humidity data; the control unit is used to control the switching of the first solenoid valve 20, the second solenoid valve 21, the third solenoid valve 22, the fourth solenoid valve 23, the fifth solenoid valve 24, and the sixth solenoid valve 25; the control unit is used to control the opening of the first partition 26 and the second partition 27; the control unit is used to control the rotation speed of the water pump 14; the control unit is used to calculate the relative humidity value u and the dryness value x of the refrigerant at the outlet of the solar generator 5.

[0049] Example 3

[0050] The operation method of the solar flash jet heat pump dehumidification and drying system includes a solar flash jet heating mode and a jet compression heating mode. The specific process is as follows:

[0051] When the solar radiation intensity is ≥400W / m 2 When the solar flash jet heating mode is in operation, the specific process is as follows:

[0052] The first solenoid valve 20, the third solenoid valve 22, the fifth solenoid valve 24 and the sixth solenoid valve 25 are opened, and the second solenoid valve 21 and the fourth solenoid valve 23 are closed. The gas phase outlet of the gas-liquid separator 7 is a high-pressure saturated gaseous refrigerant. The high-pressure saturated gaseous refrigerant absorbs the waste heat of the lubricating oil through the first heat exchanger 8 and directly enters the condenser 3 to heat the air. After the condenser 3, a high-pressure saturated / supercooled liquid is formed. After passing through the working fluid pump 4, the high-pressure liquid refrigerant absorbs heat through the solar generator 5 to become a high-pressure gas-liquid two-phase mixed refrigerant, and enters the ejector 6 as a working fluid and then enters the gas-liquid separator 7 for circulation;

[0053] The control unit calculates the relative humidity u at the temperature according to the temperature and humidity data collected by the temperature and humidity sensor 34 according to Formula 1;

[0054] u=(e / es)×100%(1)

[0055] In formula (1), e is the vapor pressure of water in the air, and es is the saturated vapor pressure at the same temperature;

[0056] The control unit compares the relative humidity u with the preset relative humidity u0. When the relative humidity value u is less than the preset relative humidity value u0, the control unit controls the first partition 26 and the second partition 27 to reduce the opening. When the relative humidity value u is greater than the preset relative humidity value u0, the control unit 35 controls the first partition 26 and the second partition 27 to increase the opening.

[0057] The control unit obtains the unit heat supply Q_out of the condenser 3 and the enthalpy value h_in at the outlet of the working fluid pump 4 according to the thermodynamic equation of the refrigerant, and the pressure and temperature data collected by the first temperature sensor 28, the first pressure sensor 29, the second temperature sensor 30, the second pressure sensor 31, and the third temperature sensor 32 and the third pressure sensor 33 at the outlet of the working fluid pump 4, and then calculates the dryness value x of the refrigerant at the outlet of the solar generator 5;

[0058] The expression of the dryness value x of the refrigerant at the outlet of the solar generator 5 is:

[0059] x=(h_out-h_f) / (h_s-h_f)(2)

[0060] In formula (2), h_f is the enthalpy of saturated water, h_s is the enthalpy of saturated steam, and h_out is the enthalpy value at the outlet of the solar generator 5;

[0061] h_out = h_in + Φ×(h_out - h_in) (3)

[0062] In formula (3), h_in is the enthalpy value at the outlet of working fluid pump 4, and Φ is the solar energy input ratio;

[0063] Φ=Q_in / Q_out(4)

[0064] In formula (4), Q_in is the solar energy input per unit time, and Q_out is the heat supply per unit time of condenser 3;

[0065] The control unit compares the dryness value x with the preset dryness value x0. When the dryness value x is less than the preset dryness value x0, the control unit controls the water pump 14 to increase the speed; when the dryness value x is greater than the preset dryness value x0, the control unit controls the water pump 14 to reduce the speed.

[0066] When the solar radiation intensity is less than 400W / m 2 Or when there is no solar radiation, the injection compression heating mode is operated. The specific process is:

[0067] The solar thermal storage circuit is closed, the first solenoid valve 20, the third solenoid valve 22, the fifth solenoid valve 24 and the sixth solenoid valve 25 are closed, the second solenoid valve 21 and the fourth solenoid valve 23 are opened, and the saturated gaseous refrigerant at the gas phase outlet of the gas-liquid separator 7 enters the air supply port of the compressor 1 and is compressed by the compressor 1 to form a high-temperature and high-pressure superheated gaseous refrigerant, which enters the condenser 3 to form a superheated gaseous refrigerant, which enters the nozzle of the ejector 6 as a primary fluid and expands to become a gas-liquid two-phase mixed refrigerant. The gas-liquid two-phase mixed refrigerant is mixed with part of the superheated gaseous refrigerant coming out of the evaporator 11 in the mixing section of the ejector 6. After being combined, it is pressurized by the diffuser section of the ejector 6 to become a gas-liquid two-phase mixed refrigerant and then discharged from the ejector 6. The gas-liquid two-phase mixed refrigerant at the outlet of the ejector 6 enters the gas-liquid separator 7 for gas-liquid separation. The saturated liquid refrigerant in the liquid phase of the gas-liquid separator 7 is cooled by the second heat exchanger 9, throttled and depressurized by the expansion valve 10, and then enters the evaporator 11 to absorb heat and evaporate to become a superheated gaseous refrigerant. The superheated gaseous refrigerant at the outlet of the evaporator 11 is divided into two paths, one path enters the air intake port of the compressor 1, and the other path enters the secondary flow inlet of the ejector 6 after being heated by the heat exchanger 9, completing the circulation of the refrigerant flow path;

[0068] The opening adjustment process of the first baffle 26 and the second baffle 27 is the same as that in the solar flash jet heating mode;

[0069] The control unit 35 controls the water pump 14 to be turned off.

Claims

1. Solar flash jet heat pump dehumidification and drying system, characterized in that: The invention comprises a fan (15), wherein the fan (15) is sequentially connected to a solar air collector (16), a first partition (26), a condenser (3), and a drying chamber (17); the drying chamber (17) is respectively connected to a second partition (27) and an evaporator (11); the second partition (27) and the evaporator (11) are both connected to a third heat exchanger (18); the third heat exchanger (18) is connected to the condenser (3); the condenser (3) is connected to a refrigerant flow path; the refrigerant flow path is respectively connected to a solar heat storage circuit and an oil circuit; a temperature and humidity sensor (34) is arranged in the drying chamber (17); the first partition (26), the second partition (27), and the temperature and humidity sensor (34) are all connected to a control unit; The refrigerant flow path comprises a compressor (1), the compressor (1) is connected in sequence to an oil separator (2), a filter (19), and a condenser (3), the condenser (3) is connected to a first solenoid valve (20) and a second solenoid valve (21), the first solenoid valve (20) is connected to a working fluid pump (4), the working fluid pump (4) is connected to a solar thermal storage circuit, the solar thermal storage circuit and the second solenoid valve (21) are both connected to an ejector (6), the ejector (6) is connected to a gas-liquid separator (7) and a second heat exchanger (9), the gas-liquid separator (7) is connected to the second heat exchanger (9), The first solenoid valve (20), the second solenoid valve (21), the third solenoid valve (22) and the fourth solenoid valve (23) are connected to the first heat exchanger (8), the second solenoid valve (21), the third solenoid valve (22) and the fourth solenoid valve (23), the second heat exchanger (9) are connected to the expansion valve (10) and the compressor (1) respectively, the expansion valve (10) is connected to the compressor (1) via the evaporator (11), the third solenoid valve (22) is connected to the first heat exchanger (8), the first heat exchanger (8) is connected to the inlet of the condenser (3), the fourth solenoid valve (23) is connected to the compressor (1), and the first solenoid valve (20), the second solenoid valve (21), the third solenoid valve (22) and the fourth solenoid valve (23) are all connected to the control unit; The saturated liquid refrigerant in the liquid phase of the gas-liquid separator (7) is cooled by the second heat exchanger (9), throttled and depressurized by the expansion valve (10), and cooled before entering the evaporator (11) to absorb heat and evaporate into superheated gaseous refrigerant. The superheated gaseous refrigerant at the outlet of the evaporator (11) is divided into two paths, one of which enters the air intake port of the compressor (1), and the other of which enters the secondary flow port of the ejector (6) after being heated by the heat exchanger (9), thereby completing the circulation of the refrigerant flow path. The oil circuit comprises a sixth solenoid valve (25), the sixth solenoid valve (25) being connected to the compressor (1) and the first heat exchanger (8) respectively, the first heat exchanger (8) being connected to the oil outlet of the oil separator (2), and the sixth solenoid valve (25) being connected to the control unit; The oil returns to the compressor (1) from the oil outlet of the oil separator (2) through the first heat exchanger (8) and the sixth solenoid valve (25).

2. The solar flash jet heat pump dehumidification and drying system according to claim 1 is characterized in that: The solar thermal storage circuit comprises a solar generator (5), the solar generator (5) being respectively connected to a water pump (14), a fifth solenoid valve (24), a working fluid pump (4), and an ejector (6); the water pump (14) and the fifth solenoid valve (24) are both connected to a hot water storage tank (13); the hot water storage tank (13) is also connected to two ends of a solar thermal collector (12); and the water pump (14) is connected to a control unit.

3. The solar flash jet heat pump dehumidification and drying system according to claim 2 is characterized in that: A first temperature sensor (28) and a first pressure sensor (29) are arranged between the oil separator (2) and the condenser (3); a second temperature sensor (30) and a second pressure sensor (31) are arranged between the condenser (3) and the working fluid pump (4); a third pressure sensor (32) and a third temperature sensor (33) are arranged between the working fluid pump (4) and the solar generator (5); and the first temperature sensor (28), the first pressure sensor (29), the second temperature sensor (30), the second pressure sensor (31), the third pressure sensor (33), and the third temperature sensor (32) are all connected to the control unit.

4. The operation method of the solar flash jet heat pump dehumidification and drying system according to claim 3 is characterized in that: When the solar radiation intensity is ≥400W / m 2 When the solar radiation intensity is less than 400W / m 2 Or when there is no solar radiation, the injection compression heating mode is operated.

5. The operation method of the solar flash jet heat pump dehumidification and drying system according to claim 4 is characterized in that: The specific process of operating the solar flash jet heating mode is as follows: The first solenoid valve (20), the third solenoid valve (22), the fifth solenoid valve (24) and the sixth solenoid valve (25) are opened, the second solenoid valve (21) and the fourth solenoid valve (23) are closed, the gas phase outlet of the gas-liquid separator (7) is a high-pressure saturated gas refrigerant, the high-pressure saturated gas refrigerant absorbs waste heat of the lubricating oil through the first heat exchanger (8) and directly enters the condenser (3) to heat the air, and forms a high-pressure saturated / supercooled liquid after the condenser (3), the high-pressure liquid refrigerant after passing through the working fluid pump (4) absorbs heat through the solar generator (5) to become a high-pressure gas-liquid two-phase mixed refrigerant, and enters the ejector (6) as a working fluid and then enters the gas-liquid separator (7) for circulation; The control unit calculates the relative humidity u at the temperature according to the temperature and humidity data collected by the temperature and humidity sensor (34) and according to formula (1); u = (e / es)×100%(1) In formula (1), e is the vapor pressure of water in the air, and es is the saturated vapor pressure at the same temperature; The control unit compares the relative humidity u with a preset relative humidity u0; when the relative humidity value u is less than the preset relative humidity value u0, the control unit controls the first partition (26) and the second partition (27) to decrease their openings; and when the relative humidity value u is greater than the preset relative humidity value u0, the control unit (35) controls the first partition (26) and the second partition (27) to increase their openings; The control unit obtains the unit heat supply Q_out of the condenser (3) and the enthalpy value h_in at the outlet of the working fluid pump (4) according to the thermodynamic equation of the refrigerant and the pressure and temperature data collected by the first temperature sensor (28), the first pressure sensor (29), the second temperature sensor (30), the second pressure sensor (31) and the third temperature sensor (32) and the third pressure sensor (33) at the outlet of the working fluid pump (4), and then calculates the dryness value x of the refrigerant at the outlet of the solar generator (5); The control unit compares the dryness value x with a preset dryness value x0; when the dryness value x is less than the preset dryness value x0, the control unit controls the water pump (14) to increase the rotation speed; when the dryness value x is greater than the preset dryness value x0, the control unit controls the water pump (14) to decrease the rotation speed.

6. The operating method of the solar flash jet heat pump dehumidification and drying system according to claim 5, characterized in that: The expression of the dryness value x of the refrigerant at the outlet of the solar generator (5) is: x = (h_out - h_f) / (h_s - h_f) (2) In formula (2), h_f is the enthalpy of saturated water, h_s is the enthalpy of saturated steam, and h_out is the enthalpy value at the outlet of the solar generator (5); h_out = h_in + Φ×(h_out - h_in) (3) In formula (3), h_in is the enthalpy value at the outlet of the working fluid pump (4), and Φ is the solar energy input ratio; Φ = Q_in / Q_out (4) In formula (4), Q_in is the solar energy input per unit time, and Q_out is the heat supply per unit time of the condenser (3).

7. The operation method of the solar flash jet heat pump dehumidification and drying system according to claim 6, characterized in that: The specific process of operating the injection compression heating mode is as follows: The solar thermal storage circuit is closed, the first solenoid valve (20), the third solenoid valve (22), the fifth solenoid valve (24) and the sixth solenoid valve (25) are closed, the second solenoid valve (21) and the fourth solenoid valve (23) are opened, the saturated gaseous refrigerant at the gas phase outlet of the gas-liquid separator (7) enters the air supply port of the compressor (1), is compressed by the compressor (1) to form a high-temperature and high-pressure superheated gaseous refrigerant, enters the condenser (3), forms a superheated gaseous refrigerant as a primary fluid, enters the nozzle of the ejector (6), and expands to become a gas-liquid two-phase mixed refrigerant, the gas-liquid two-phase mixed refrigerant and the part of the superheated gaseous refrigerant coming out of the evaporator (11) are mixed in the mixing section of the ejector (6). After being mixed, the mixture is pressurized in the diffuser section of the ejector (6) to become a gas-liquid two-phase mixed refrigerant and then discharged from the ejector (6). The gas-liquid two-phase mixed refrigerant at the outlet of the ejector (6) enters the gas-liquid separator (7) for gas-liquid separation. The saturated liquid refrigerant in the liquid phase of the gas-liquid separator (7) is cooled by the second heat exchanger (9), throttled and depressurized by the expansion valve (10), and cooled before entering the evaporator (11) to absorb heat and evaporate to become a superheated gaseous refrigerant. The superheated gaseous refrigerant at the outlet of the evaporator (11) is divided into two paths, one path enters the air intake port of the compressor (1), and the other path enters the secondary inlet of the ejector 6 after being heated by the heat exchanger (9), thereby completing the circulation of the refrigerant flow path; The opening adjustment process of the first baffle (26) and the second baffle (27) is the same as the process in the solar flash jet heating mode; The control unit (35) controls the water pump (14) to be turned off.

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