Air source heat pump drying system for photovoltaic rock heat regeneration and energy storage

Abstract

The utility model relates to the technical field of drying, in particular to a photovoltaic rock regenerative energy storage air source heat pump drying system which comprises an air source heat pump unit and a drying box, the air source heat pump unit is composed of a compressor, a condenser, an evaporator and a fan, the compressor is connected with a photovoltaic power generation unit, the condenser is installed in the drying box, and the evaporator is installed in the drying box. A rock regenerative energy storage unit is installed on one side of the evaporator and connected with the drying box through a pipeline, and the rock regenerative energy storage unit is connected with the main controller. Compared with the prior art, energy of sunlight is converted into heat of rocks to be stored in the rock regenerative energy storage unit in the daytime in plateau, severe cold and large diurnal temperature difference areas, and when the air temperature is reduced and the heating performance of the air source heat pump unit is attenuated at night, the heat in the rock regenerative energy storage unit is released, so that the heat energy of the rocks can be stored in the rock regenerative energy storage unit. The heat pump unit is used for increasing the ambient temperature around the evaporator, stable heating of the heat pump unit is guaranteed, stable energy supply in the drying box is maintained, and the quality of dried materials is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of drying, in particular to an air source heat pump drying system for photovoltaic rock regenerative energy storage. Background Art

[0002] Traditional material drying and dehumidification generally adopt natural drying or heating drying. Open-air natural drying has low efficiency, large floor area, is vulnerable to weather influence, consumes a large amount of manpower and material resources, is also vulnerable to pollution by dust and insects, and it is difficult to guarantee the quality of dried agricultural and sideline products. Although fossil fuel drying is not restricted by the above objective factors, the fossil fuel required for drying, on the one hand, pollutes the environment, and on the other hand, some components of the fossil fuel will pollute the dried products, affecting the quality of agricultural and sideline products. Reducing the use of fossil fuels and actively developing new energy are the inevitable trends in the development of the green drying industry.

[0003] Heat pump drying technology is a technology that uses electrical energy and uses a heat pump device to transfer heat from a low-temperature heat source to a high-temperature heat source. One part of electricity can transfer several parts of heat. Compared with general electric heating drying, it can save more than 50% of energy consumption. At the same time, it can have the dual effects of condenser heating and evaporator dehumidification, and it is the development direction of future drying technology.

[0004] However, for areas with high altitude, severe cold and large temperature difference between day and night, solar direct drying is affected by the environment. At the same time, after the ambient temperature of a conventional air source heat pump drops below 0°C, the heating performance of the unit fluctuates and decays, and the temperature of the drying room drops significantly. When the ambient temperature continuously drops to the dew point temperature of the air, the evaporator will frost, the compression ratio of the compressor increases, and the exhaust temperature of the compressor rises sharply, resulting in the system alarm and shutdown. In view of this, the present utility model is particularly proposed. Summary of the Utility Model

[0005] In order to overcome the above technical defects, the present utility model provides an air source heat pump drying system for photovoltaic rock regenerative energy storage, which can provide sufficient heat for the evaporation end under low-temperature working conditions, ensure the stable operation and heating of the heat pump unit, and solve the problem that the traditional heat pump drying system cannot continuously dry at night under high-cold and large temperature difference conditions.

[0006] The technical solution adopted by the present utility model is as follows: An air source heat pump drying system for photovoltaic rock regenerative energy storage includes an air source heat pump unit composed of a compressor, a condenser, an evaporator, and a fan, and a drying box. The compressor is connected to a photovoltaic power generation unit. The condenser is installed in the drying box. A rock regenerative energy storage unit is installed on one side of the evaporator. The rock regenerative energy storage unit is connected to the drying box through a pipeline, and the rock regenerative energy storage unit is connected to a main controller.

[0007] In a specific solution, the evaporator is a finned-tube evaporator, the condenser is a finned-tube condenser, and the compressor is a scroll compressor.

[0008] Specifically, according to the working conditions of high altitude, severe cold, and large temperature difference, the main controller controls the opening and closing of the rock regenerative energy storage unit, combines the air energy with the rock regenerative energy storage, ensures that the heat pump unit can stably heat under the conditions of high cold and large temperature difference, and at the same time ensures that the drying process can proceed continuously. The photovoltaic power generation unit provides electric energy for the stable operation of the air source heat pump unit.

[0009] Furthermore, the rock regenerative energy storage unit includes a heat storage tank filled with rock materials. The heat storage tank is provided with a heat extraction pipe, a heat return pipe, and a heat discharge pipe. The heat extraction pipe and the heat return pipe are communicated with the drying box. The outlet of the heat extraction pipe is arranged towards the evaporator. The first solenoid valve, the second solenoid valve, and the third solenoid valve are respectively installed on the heat extraction pipe, the heat return pipe, and the heat discharge pipe. The first solenoid valve, the second solenoid valve, and the third solenoid valve are all connected to the main controller.

[0010] Specifically, when the sunlight is sufficient during the day, the first solenoid valve and the second solenoid valve are opened, and the third solenoid valve is closed, so that the heat storage tank, the evaporator, the compressor, the condenser, and the fan form an air source heat pump drying energy storage system. The working medium absorbs heat from the air through the evaporator, releases heat to the drying box through the condenser, heats the material, and then flows into the heat storage tank through the heat extraction pipe to heat the rock bed, converting it into the heat of the rock for storage; when the air temperature drops at night and the heating performance of the air source heat pump unit decays, the first solenoid valve is closed, the second solenoid valve is opened and / or closed, and the third solenoid valve is opened. The hot air flows to the evaporator through the heat discharge pipe, and the working medium absorbs the air heat in the heat storage tank through the evaporator. After the compressor raises the temperature and pressure, it releases heat to the drying box through the condenser. The heat stored during the day is taken out for the heat pump unit to use, so that the heat pump unit does not operate or reduces the operation time under adverse working conditions, improves the heating performance of the heat pump unit under high cold and large temperature difference, and ensures the drying quality of the material.

[0011] Furthermore, a first circulation fan, a second circulation fan, and a heat extraction fan are respectively arranged in the heat extraction pipe, the heat return pipe, and the heat discharge pipe. The first circulation fan is located on one side of the drying box, and the second circulation fan and the heat extraction fan are located on one side of the heat storage tank.

[0012] Specifically, through the first circulation fan and the heat extraction pipe, the heat energy in the drying box can be introduced into the heat storage box to heat the rock bed in the heat storage box, and then, through the second circulation fan and the heat return pipe, it flows back into the drying box. Through this cycle, the heat generated by the air source heat pump unit is converted into the heat of the rock and stored; through the first circulation fan and the heat extraction pipe, the heat energy in the drying box can be introduced into the heat storage box to heat the rock bed in the heat storage box, and then, through the heat extraction fan and the exhaust heat pipe, the heat stored in the rock bed is discharged to increase the ambient temperature around the evaporator.

[0013] Further, a cold air inlet is provided on the heat storage box, and a fourth solenoid valve is installed at the cold air inlet and connected to the main controller.

[0014] Specifically, the cold air enters the heat storage box through the cold air inlet, exchanges heat with the rock bed, extracts the heat stored in the rock, and is used to increase the ambient temperature around the evaporator.

[0015] Further, an expansion valve is provided on the pipeline between the condenser and the evaporator.

[0016] Specifically, the working medium absorbs heat from the air through the evaporator, is heated and pressurized by the compressor, releases heat through the condenser and the condenser, and returns to the evaporator after being cooled and depressurized by the expansion valve. Through this cycle.

[0017] Further, it also includes a temperature sensor, which is arranged close to the evaporator, and the temperature sensor is connected to the main controller.

[0018] Specifically, the ambient temperature around the evaporator is monitored by the temperature sensor. When the surface temperature of the evaporator is lower than the set temperature, the main controller controls the opening and closing of the first solenoid valve, the second solenoid valve, the third solenoid valve and the fourth solenoid valve, extracts the heat in the rock heat recovery energy storage system for the evaporation end to use, improves the deteriorated heating performance of the heat pump unit, and ensures the energy demand inside the drying box.

[0019] Further, the photovoltaic power generation unit includes multiple groups of solar power generation components and a photovoltaic power generation controller, and the solar power generation components, the photovoltaic power generation controller and the compressor are electrically connected.

[0020] Specifically, multiple groups of solar photovoltaic power generation components are connected in series and fixedly installed facing south in an open and unobstructed area. The solar photovoltaic power generation components are connected to the photovoltaic power generation controller and drive the compressor to work.

[0021] Further, the drying box is made of heat-insulating plates, and a material rack and a material tray are installed in the drying box.

[0022] In a specific solution, the drying box is a rectangular box spliced by polyurethane heat-insulating boards, and has good heat-insulating performance.

[0023] Further, a drainage cover is installed at the outlet end of the exhaust heat pipe.

[0024] Specifically, the heat energy in the heat storage tank is evenly guided to the evaporator through the drainage cover, continuously providing heat for the evaporator.

[0025] Further, a low-pressure gauge and a high-pressure gauge are further included. The low-pressure gauge is located on the pipeline between the compressor and the evaporator, and the high-pressure gauge is located on the pipeline between the compressor and the condenser. Specifically, it is used to monitor the operating stability of the working medium in the air source heat pump unit.

[0026] Beneficial effects: An air source heat pump drying system with photovoltaic rock regenerative energy storage provided by the present utility model can convert the energy of sunlight into the heat of rocks during the day and store it in the rock regenerative energy storage unit in areas with high altitudes, severe cold, and large temperature differences between day and night. When the air temperature drops at night and the heating performance of the air source heat pump unit decays, the heat in the rock regenerative energy storage unit is released to increase the ambient temperature around the evaporator, ensuring the stable heating of the heat pump unit, maintaining the stable energy supply inside the drying box, and ensuring the quality of the dried materials. Description of the Drawings

[0027] Figure 1 It is a schematic structural diagram of the present utility model. Specific Embodiments

[0028] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model. It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly. In addition, the descriptions involving "first", "second", etc. in the present utility model are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0029] Please refer to Figure 1 Figure 1 , in an embodiment of the present utility model, an air source heat pump drying system for photovoltaic rock regenerative energy storage includes an air source heat pump unit composed of a compressor 4, a condenser 7, an evaporator 25, and a fan, and a drying box 8. The compressor 4 is connected to a photovoltaic power generation unit. The condenser 7 is installed in the drying box 8. The drying box 8 is connected to a rock regenerative energy storage unit through a pipeline. An air flow path is formed between one side of the evaporator 25 and the rock regenerative energy storage unit. The rock regenerative energy storage unit is connected to a main controller. In a more optimal specific embodiment, the evaporator 25 is a finned-tube evaporator, and the condenser 7 is a finned-tube condenser. Both the finned-tube evaporator and the finned-tube condenser are equipped with fans. According to the working conditions of high altitude, severe cold, and large temperature difference, the opening and closing of the rock regenerative energy storage unit are controlled by the main controller, combining air energy with rock regenerative energy storage to ensure that the heat pump unit can stably heat under high cold and large temperature difference, and at the same time ensure that the drying process can proceed continuously. The photovoltaic power generation unit provides electrical energy for the stable operation of the air source heat pump unit.

[0030] In a specific embodiment, the rock regenerative energy storage unit includes a heat storage tank 18 filled with rock materials. The heat storage tank 18 is provided with a heat extraction pipe 12, a heat return pipe 13, and a heat extraction pipe 12. The heat extraction pipe 12 and the heat return pipe 13 are communicated with the drying box 8. The outlet of the heat extraction pipe 12 is arranged towards the evaporator 25 to form the air flow path. A first solenoid valve 11, a second solenoid valve 14, and a third solenoid valve 22 are respectively installed on the heat extraction pipe 12, the heat return pipe 13, and the heat discharge pipe 21. The first solenoid valve 11, the second solenoid valve 14, and the third solenoid valve 22 are all connected to the main controller;

[0031] When the sunlight is sufficient during the day, the first solenoid valve and the second solenoid valve are opened, and the third solenoid valve is closed, so that the heat storage tank, the evaporator, the compressor, the condenser, and the fan form an air source heat pump drying energy storage system. The working medium absorbs heat from the air through the evaporator, releases heat to the drying box through the condenser, heats the material, and then flows into the heat storage tank through the heat extraction pipe to heat the rock bed and convert it into heat stored in the rock;

[0032] When the air temperature drops at night and the heating performance of the air source heat pump unit decays, the first solenoid valve is closed, the second solenoid valve is opened and / or closed, and the third solenoid valve is opened. The hot air flows through the heat discharge pipe to the evaporator. The working medium absorbs the air heat in the heat storage tank through the evaporator. After the compressor raises the temperature and pressure, it releases heat to the drying box through the condenser;

[0033] The heat stored during the day is taken out for the use of the heat pump unit, so that the heat pump unit does not operate or reduces the operation time under adverse working conditions, improves the heating performance of the heat pump unit under high cold and large temperature difference, and ensures the drying quality of the material.

[0034] In a specific embodiment, a first circulation fan 10, a second circulation fan 15 and a heat extraction fan 20 are respectively provided in the heat extraction pipe 12, the heat return pipe 13 and the heat discharge pipe 21. The first circulation fan 10 is located on one side of the drying box 8, and the second circulation fan 15 and the heat extraction fan 20 are located on one side of the heat storage box 18.

[0035] Through the first circulation fan and the heat extraction pipe 12, the thermal energy in the drying box 8 can be introduced into the heat storage box to heat the rock bed in the heat storage box 18, and then through the second circulation fan 15 and the heat return pipe 13, it flows back into the drying box 8. Through this cycle, the heat generated by the air source heat pump unit is converted into the heat of the rock and stored.

[0036] Through the first circulation fan and the heat extraction pipe 12, the thermal energy in the drying box 8 can be introduced into the heat storage box 18 to heat the rock bed in the heat storage box 18, and then through the heat extraction fan 20 and the heat discharge pipe 21, the heat stored in the rock bed is discharged to increase the ambient temperature around the evaporator 25.

[0037] In a specific embodiment, a cold air inlet 16 is provided on the heat storage box 18, and a fourth solenoid valve 17 is installed at the cold air inlet 16 and connected to the main controller. Cold air enters the heat storage box 18 through the cold air inlet 16, exchanges heat with the rock bed, and extracts the heat stored in the rock for increasing the ambient temperature around the evaporator 25.

[0038] In a specific embodiment, an expansion valve 26 is provided on the pipeline between the condenser 7 and the evaporator 25. The working medium absorbs heat from the air through the evaporator, releases heat through the condenser after being heated and pressurized by the compressor, and returns to the evaporator after being cooled and depressurized by the expansion valve. Through this cycle.

[0039] In a specific embodiment, a temperature sensor is further included. The temperature sensor is arranged close to the evaporator 25 and is connected to the main controller. By monitoring the ambient temperature around the evaporator through the temperature sensor, when the surface temperature of the evaporator 25 is lower than the set temperature, the main controller controls the opening and closing of the first solenoid valve 11, the second solenoid valve 14, the third solenoid valve 22 and the fourth solenoid valve 17, extracts the heat in the rock heat recovery and energy storage system for use at the evaporation end, improves the deteriorated heating performance of the heat pump unit, and ensures the internal energy demand of the drying box 8.

[0040] In a specific embodiment, the photovoltaic power generation unit includes multiple groups of solar power generation components 1 and a photovoltaic power generation controller 2. The solar power generation components, the photovoltaic power generation controller 2 and the compressor 4 are electrically connected; multiple groups of solar photovoltaic power generation components are connected in series and fixedly installed facing south in an open and unobstructed area. The solar photovoltaic power generation components are connected to the photovoltaic power generation controller and drive the compressor to work.

[0041] In a specific embodiment, the drying oven 8 is made of heat-insulating plates, and a material rack and a material tray are installed in the drying oven 8; in a more optimal specific embodiment, the drying oven is a rectangular box body spliced by polyurethane heat-insulating plates, and has good heat-insulating performance.

[0042] In a specific embodiment, a diversion hood 23 is installed at the outlet end of the exhaust heat pipe 21; the heat energy in the heat storage tank 18 is evenly guided to the evaporator 25 through the diversion hood 23 to continuously provide heat for the evaporator 25.

[0043] In a specific embodiment, a low-pressure gauge 3 and a high-pressure gauge 5 are further included. The low-pressure gauge 3 is located on the pipeline between the compressor 4 and the evaporator 25, and the high-pressure gauge 5 is located on the pipeline between the compressor 4 and the condenser 7; it is used to monitor the operation stability of the working medium in the air source heat pump unit.

[0044] The following further illustrates the present utility model in conjunction with a specific application scenario:

[0045] An air source heat pump drying system for photovoltaic rock regenerative energy storage includes a solar power generation component 1, a photovoltaic power generation controller 2, a low-pressure gauge 3, a scroll compressor 4, a high-pressure gauge 5, a condensing fan 6, a finned-tube condenser 7, a drying oven 8, a material tray 9, a first circulation fan 10, a first solenoid valve 11, a heat extraction pipe 12, a heat return pipe 13, a second solenoid valve 14, a second circulation fan 15, a cold air inlet 16, a fourth solenoid valve 17, a heat storage tank 18, a rock bed 19, a heat extraction fan 20, an exhaust heat pipe 21, a third solenoid valve 22, a diversion hood 23, an evaporation fan 24, a finned-tube evaporator 25, an expansion valve 26, a temperature sensor not shown in the figure and a main controller not shown in the figure; wherein, the finned-tube evaporator 25, the scroll compressor 4, the finned-tube condenser 7 and the expansion valve 26 are connected by copper pipes. The finned-tube condenser 7 is configured with a condensing fan 6, and the finned-tube evaporator 25 is configured with an evaporation fan 24. The temperature sensor is arranged close to the finned-tube evaporator 25; the heat storage tank 18 is installed near the drying oven 8. The heat storage tank 18 is internally provided with a rock bed 19. The heat storage tank 18 is connected to the drying oven 8 through the heat extraction pipe 12 and the heat return pipe 13, and the heat extraction pipe 12 and the heat return pipe 13 are respectively provided with a first solenoid valve 11, a second solenoid valve 14, a first circulation fan 10 and a second circulation fan 15. The heat storage tank 18 forms a fluid connection area with the finned-tube evaporator 25 through the exhaust heat pipe 21 and evenly supplies the finned-tube evaporator 25 through the diversion hood 23. The exhaust heat pipe 21 is provided with a third solenoid valve 22 and a heat extraction fan 20. The heat storage tank 18 is provided with a cold air inlet duct 16, and the cold air inlet duct is provided with a fourth solenoid valve 17; the finned-tube condenser 7 of the heat pump unit is installed inside the drying oven 8, and a material rack and a material tray 9 are installed inside the drying oven for placing materials.

[0046] In use, the solar photovoltaic power generation modules are fixedly installed facing south in an open and unobstructed area. Multiple groups of solar photovoltaic power generation modules 1 are connected in series to form a photovoltaic power generation unit. Each solar photovoltaic power generation module 1 is connected to a photovoltaic power generation controller 2 and drives a compressor 4 to operate. When there is sufficient sunlight during the day and the ambient temperature is relatively high, the compressor 4 is completely driven by the solar power generation modules and the photovoltaic controller 2. When the solar radiation is insufficient during the day, the mains power is used to supplement and drive the compressor 4 to operate.

[0047] The switching of the heat pump working mode is completed by controlling the opening and closing of the solenoid valves and the circulation fans. When there is sufficient sunlight during the day and the ambient temperature is relatively high, the first solenoid valve 11, the second solenoid valve 14, the first circulation fan 10 and the circulation fan 15 can be controlled to open, and the air source heat pump unit starts. The working medium absorbs heat from the air through the finned-tube evaporator 25. After the scroll compressor 4 raises the temperature and pressure, it releases heat to the drying oven 8 through the finned-tube condenser 6, heats the material 9, and then flows into the rock regenerative energy storage tank 18 through the first circulation fan 10 and the exhaust heat pipe 12 to heat the rock bed 19. Finally, it enters the drying oven 8 through the second circulation fan 15 and the ventilation pipe 13, and circulates in this way.

[0048] When the ambient temperature continuously decreases at night and the heating performance of the air source heat pump unit decays to the point where it cannot meet the requirements of the drying oven, and the surface temperature of the finned-tube evaporator 25 is lower than the set temperature, on the one hand, the first solenoid valve 11 and the first circulation fan 10 can be controlled to close, and the second solenoid valve 14 and the second circulation fan 15 can be opened. The hot air in the energy storage tank raises the ambient temperature around the evaporator through the heat extraction fan 20 and the exhaust heat pipe 21. On the other hand, the first solenoid valve 11, the second solenoid valve 14, the first circulation fan 10 and the second circulation fan 15 can be controlled to close, and the fourth solenoid valve 17, the third solenoid valve 22 and the heat extraction fan 20 can be opened. The cold air enters the energy storage tank 18 through the cold air inlet 16, is heated and then raises the ambient temperature around the evaporator through the heat extraction fan 20 and the exhaust heat pipe 21.

[0049] The working medium absorbs the heat of the air taken out by the drainage cover 23 through the finned-tube evaporator 25. After the scroll compressor 4 raises the temperature and pressure, it releases heat to the drying oven 8 through the finned-tube condenser 6, and then returns to the finned-tube evaporator 25 after reducing the temperature and pressure through the expansion valve 26. The working medium absorbs the heat of the air taken out by the drainage cover 23 through the finned-tube evaporator 25 again, and circulates in this way.

[0050] When the ambient temperature starts to rise on the second day and the heating capacity of the heat pump unit can meet the heat required for drying the materials inside the drying oven, that is, when the surface temperature of the finned evaporator 25 is higher than the set temperature, control the opening and closing of the first solenoid valve 11, the fourth solenoid valve 17, the second solenoid valve 14, the third solenoid valve 22 and the start and stop of the circulation fans 10, 15, 20, start the heat pump drying system and the rock regenerative energy storage system. The working medium absorbs heat from the air through the finned evaporator 25, the scroll compressor 4 increases the temperature and pressure and then releases heat to the drying oven 8 through the finned condenser 6. After heating the material 9, it flows into the rock regenerative energy storage tank 18 through the first circulation fan 10 and the exhaust heat pipe 12 to heat the rock bed 19, and finally enters the drying oven 8 through the second circulation fan 15 and the circulation air duct 13. Thus, it circulates reciprocally to realize the full utilization and storage of air energy and solar energy during the day.

[0051] At night, by controlling the opening and closing of the solenoid valves and the start and stop of the circulation fans, the heat stored during the day is taken out for the use of the heat pump unit, so that the heat pump unit does not operate or reduces the operation time under adverse conditions, improves the heating performance of the heat pump unit under high cold and large temperature differences, and ensures the drying quality of the materials.

[0052] It should be noted that the above description is only the preferred embodiment of the present invention. Those skilled in the art, inspired by the present invention and without violating the purpose and claims of the present invention, can make various similar representations, and such transformations all fall within the protection scope of the present invention.

Claims

1. An air source heat pump drying system for photovoltaic rock heat recovery and energy storage, comprising an air source heat pump unit consisting of a compressor (4), a condenser (7), an evaporator (25), a fan and a drying box (8), characterized in that: The compressor (4) is connected to a photovoltaic power generation unit, the condenser (7) is installed in the drying box (8), a pipeline of the drying box (8) is connected to a rock heat recovery energy storage unit, an air flow passage is formed between one side of the evaporator (25) and the rock heat recovery energy storage unit, and the rock heat recovery energy storage unit is connected to a main controller.

2. The air source heat pump drying system with photovoltaic rock heat recovery and energy storage according to claim 1 is characterized by: The rock heat recovery energy storage unit comprises a heat storage box (18), the heat storage box (18) is filled with rock material, the heat storage box (18) is provided with a heat extraction pipe (12), a heat recovery pipe (13) and a heat exhaust pipe (21), the heat extraction pipe (12) and the heat recovery pipe (13) are connected to the drying box (8), the outlet of the heat extraction pipe (12) is arranged toward the evaporator (25) to form the air flow passage, the heat extraction pipe (12), the heat recovery pipe (13) and the heat exhaust pipe (21) are respectively installed with a first solenoid valve (11), a second solenoid valve (14) and a third solenoid valve (22), the first solenoid valve (11), the second solenoid valve (14) and the third solenoid valve (22) are all connected to a main controller.

3. The air source heat pump drying system with photovoltaic rock heat recovery and energy storage according to claim 2 is characterized by: The heat extraction pipe (12), the heat recovery pipe (13) and the heat exhaust pipe (21) are respectively provided with a first circulation fan (10), a second circulation fan (15) and a heat extraction fan (20); the first circulation fan (10) is located on one side of the drying box (8), and the second circulation fan (15) and the heat extraction fan (20) are located on one side of the heat storage box (18).

4. The air source heat pump drying system with photovoltaic rock heat recovery and energy storage according to claim 2 is characterized in that: The heat storage box (18) is provided with a cold air inlet (16), and the cold air inlet (16) is installed with a fourth solenoid valve (17) connected to the main controller.

5. The air source heat pump drying system with photovoltaic rock heat recovery and energy storage according to claim 2 is characterized by: An expansion valve (26) is provided on the pipeline between the condenser (7) and the evaporator (25).

6. The air source heat pump drying system with photovoltaic rock heat recovery and energy storage according to claim 1 is characterized by: It also includes a temperature sensor, which is arranged close to the evaporator (25) and connected to a main controller.

7. The air source heat pump drying system with photovoltaic rock heat recovery and energy storage according to claim 2 is characterized by: The photovoltaic power generation unit comprises a plurality of groups of solar power generation components (1) and a photovoltaic power generation controller (2), and the solar power generation components, the photovoltaic power generation controller (2) and the compressor (4) are electrically connected.

8. The air source heat pump drying system with photovoltaic rock heat recovery and energy storage according to claim 1 is characterized by: The drying box (8) is made of a heat-insulating plate material, and a material rack and a material tray (9) are installed in the drying box (8).

9. The air source heat pump drying system with photovoltaic rock heat recovery and energy storage according to claim 2 is characterized by: A flow guide cover (23) is installed at the outlet end of the heat exhaust pipe (21).

10. The air source heat pump drying system with photovoltaic rock heat recovery and energy storage according to claim 2 is characterized in that: It also includes a low-pressure gauge (3) and a high-pressure gauge (5), wherein the low-pressure gauge (3) is located on the pipeline between the compressor (4) and the evaporator (25), and the high-pressure gauge (5) is located on the pipeline between the compressor (4) and the condenser (7).

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