Agricultural product heat pump drying room based on dew point dehumidification and energy recovery dehumidification

Abstract

The agricultural product heat pump drying room comprises a base, a drying room is arranged on the top of the base, a water suction pump is fixedly installed on one side of the drying room, and a heat pump unit located on the rear side of the water suction pump is fixedly installed on one side of the drying room; the water inlet end of the water suction pump is fixedly provided with a water suction pipe communicated with the underground water well, the water outlet end of the water suction pump is fixedly provided with a water inlet pipe, the other end of the water inlet pipe is fixedly installed with a cooling water inlet of the heat pump unit, the bottom of the heat pump unit is fixedly provided with an air guide pipe, and the bottom of the air guide pipe is fixedly provided with a dispersion pipe. According to the agricultural product heat pump drying room based on dew-point dehumidification and energy recovery dehumidification, hot air is sprayed into the drying room through the air nozzles, the multiple evenly-distributed air nozzles can conveniently and evenly blow the hot air into the drying room, it is guaranteed that agricultural products in the drying room are evenly heated, the large temperature difference in the agricultural products is avoided, and the drying effect of the agricultural products is improved.

Description

Technical Field

[0001] The invention relates to the technical field of agricultural product processing, in particular to an agricultural product heat pump drying room based on dew point dehumidification and energy recovery dehumidification. Background Art

[0002] Drying rooms are usually used when materials need to be dried. Drying rooms can quickly dry materials and are widely used in the field of agricultural product processing. Farmers' fruits and vegetables can be dried in drying rooms to extend storage time and obtain different flavors. When fruits and vegetables are unsalable, it can also reduce farmers' losses.

[0003] With the improvement of people's quality of life, the awareness of environmental protection is getting stronger and stronger, and non-renewable energy (such as natural gas, coal, oil) is becoming increasingly exhausted. The use of the original high-energy consumption and high-pollution drying equipment such as coal, oil or electric heating is strictly restricted or even banned. It is becoming more and more urgent to find a new, safe, environmentally friendly, and energy-efficient drying and dehumidification equipment to replace the original old drying and dehumidification equipment. Summary of the invention

[0004] In view of the defects in the prior art, the present invention provides a heat pump drying room for agricultural products based on dew point dehumidification and energy recovery dehumidification, comprising a base, a drying room is arranged on the top of the base, a water pump is fixedly installed on one side of the drying room, a heat pump unit located at the rear side of the water pump is fixedly installed on one side of the drying room, a water pump pipe connected to a groundwater well is fixedly installed on the water inlet end of the water pump, a water inlet pipe is fixedly installed on the water outlet end of the water pump, the other end of the water inlet pipe is fixedly installed on the cooling water inlet of the heat pump unit, an air guide pipe is fixedly installed on the bottom of the heat pump unit, a dispersion pipe is fixedly installed on the bottom of the air guide pipe, an air nozzle facing the inside of the drying room is fixedly installed on the top of the dispersion pipe, an air intake pipe is fixedly installed on the top of the drying room, an air collecting hood is fixedly installed on the bottom of the air intake pipe, and the other end of the air intake pipe is connected to the air inlet of the heat pump unit.

[0005] Preferably, an empty slot located above the dispersion pipe is opened on the top of the base, a protective mesh cover is fixedly installed on the top of the empty slot, and the top of the protective mesh cover is flush with the top of the base.

[0006] Preferably, a buffer water tank is fixedly installed on the top of the drying room, a dew point dehumidifier located on the rear side of the buffer water tank is fixedly installed on the top of the drying room, a water outlet pipe located above the water pump is fixedly installed on the front of the heat pump unit, and one side of the buffer water tank is fixedly installed with the other end of the water outlet pipe.

[0007] Preferably, a connecting duct is fixedly installed on the rear side of the buffer water tank, the other end of the connecting duct is fixedly installed on the dew-point dehumidifier, a water delivery pump is arranged in the middle of the connecting duct, one side of the dew-point dehumidifier is fixedly installed on the other end of the air inlet pipe, the air inlet pipe is provided with an intake fan located on one side of the dew-point dehumidifier, a return air duct located on the rear side of the air inlet pipe is fixedly installed on the side of the dew-point dehumidifier, the other end of the return air duct is fixedly installed on the air inlet of the heat pump unit, and an air supply fan is arranged at the connection between the return air duct and the air inlet of the heat pump unit.

[0008] Preferably, a cooling water inlet located on one side of the air supply fan is provided at the top of the heat pump unit, a water receiving conduit is fixedly installed on the cooling water inlet, the other end of the water receiving conduit is fixedly installed on the middle part of the water outlet pipe, a circulating water pump is fixedly installed on the middle part of the water receiving conduit, a cooling water outlet is provided on the top of the heat pump unit, a circulating conduit located above the heat pump unit is fixedly installed on the cooling water outlet, and the other end of the circulating conduit is fixedly installed on the middle part of the water inlet pipe.

[0009] Preferably, a return water pipe located on the rear side of the return air duct is fixedly installed on one side of the dew point dehumidifier, and the other end of the return water pipe is fixedly installed on the middle part of the water inlet pipe. The connection between the return water pipe and the water inlet pipe is located in front of the connection between the circulation duct and the water inlet pipe, and a one-way valve is arranged in the middle part of the return water pipe.

[0010] Preferably, a gate is provided on the other side of the drying room, and a stepping platform below the gate is provided on one side of the drying room, and the width of the stepping platform is greater than the width of the gate.

[0011] Preferably, the heat pump unit includes an air circulation heating mechanism, the bottom of the return air duct is fixedly installed with the air inlet of the heating mechanism, the air guide duct is fixedly installed with the air inlet and outlet of the heating mechanism, the heat exchange mechanism inside the heat pump unit provides a heat source for the heating mechanism, the dew-point dehumidifier is provided with an evaporator inside, the connecting conduit is connected to the liquid inlet of the evaporator inside the dew-point dehumidifier, the return water pipe is connected to the liquid outlet of the evaporator inside the dew-point dehumidifier, the heat pump unit is provided with a cooling coil wrapped around the outside of the internal heat-generating component, and the cooling water inlet and the cooling water outlet are respectively connected to the two ends of the cooling coil.

[0012] Preferably, a plurality of the dispersion pipes are evenly laid inside the base, and a plurality of the air inlet pipes are evenly arranged on the top inside the drying chamber.

[0013] Preferably, a pressure sensor is provided inside the buffer water tank, and an insulation board is wrapped outside the buffer water tank.

[0014] The beneficial effects of the present invention are embodied in:

[0015] 1. The agricultural product heat pump drying room based on dew point dehumidification and energy recovery dehumidification is provided with a dispersion pipe and an air inlet pipe. After the agricultural products to be dried are put into the drying room through the door, the heat pump unit is started, and the suction fan sucks out the high-temperature and high-humidity air inside the drying room through the air inlet pipe through the air collecting hood. At the same time, the high-temperature and low-humidity hot air heated by the heat pump unit is transported to the dispersion pipe through the dispersion pipe, and then sprayed into the drying room through the air nozzle. The evenly arranged multiple air nozzles are convenient for evenly blowing the hot air into the drying room, ensuring the uniform heating of the agricultural products in the drying room, avoiding large temperature differences inside, and improving the drying effect of the agricultural products.

[0016] 2. The agricultural product heat pump drying room based on dew point dehumidification and energy recovery dehumidification is provided with a heat pump unit. When the heat pump unit is working, water is pumped from the water well through the pumping pipe by the water pump, and is transported to the heat pump unit through the water inlet pipe. The groundwater after heat exchange is discharged from the outlet pipe, and the groundwater after heat exchange flows into the buffer water tank through the outlet pipe, and then the low-temperature water inside the buffer water tank is transported into the evaporator inside the dew point dehumidifier by the delivery water pump, so that the high-temperature and high-humidity air transported into the dew point dehumidifier through the air inlet pipe is cooled and dehumidified, and the low-temperature air after dehumidification is sent into the heat pump unit through the return air duct for heating, so that the water discharged after heat exchange is recycled, which prevents a large amount of water resources from being wasted, is beneficial to the environmental protection of the device, and is convenient for directly utilizing the water source, thereby improving the convenience of the device.

[0017] 3. The agricultural product heat pump drying room based on dew point dehumidification and energy recovery dehumidification is equipped with a water inlet pipe. The groundwater after heat exchange is discharged from the outlet pipe. The circulating water pump draws part of the low-temperature water from the outlet pipe through the water inlet pipe and sends it to the cooling water inlet to cool down the equipment inside the heat pump unit. The cooling water after absorbing heat is sent to the water inlet pipe through the cooling water outlet and the circulating pipe, thereby achieving the purpose of recycling the water discharged after heat exchange.

[0018] 4. The agricultural product heat pump drying room based on dew point dehumidification and energy recovery dehumidification is equipped with a return pipe. When the dew point dehumidifier cools down the high-temperature and high-humidity air extracted from the drying room, the water vapor in the air condenses, and the condensed water and the low-temperature water transported to the evaporator are transported to the water inlet pipe again through the return pipe, mixed with the groundwater pumped by the water pump, and then sent to the heat pump unit for heat exchange. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the description of the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a structural schematic diagram of the drying room of the present invention;

[0022] Figure 3 It is a structural schematic diagram of the base of the present invention;

[0023] Figure 4 For the present invention Figure 3 The enlarged view of point A in the middle;

[0024] Figure 5 It is a schematic diagram of the structure of the air intake pipe of the present invention;

[0025] Figure 6 It is a structural schematic diagram of the heat pump unit of the present invention;

[0026] Figure 7 It is a partial structural schematic diagram of the return air duct of the present invention;

[0027] Figure 8 It is a schematic structural diagram of the water receiving conduit of the present invention.

[0028] In the attached figure: 1. base; 2. drying room; 3. water pump; 4. water pump pipe; 5. water inlet pipe; 6. heat pump unit; 7. air duct; 8. dispersion pipe; 9. air nozzle; 10. empty slot; 11. protective net cover; 12. water outlet pipe; 13. buffer water tank; 14. connecting duct; 15. water delivery pump; 16. dew point dehumidifier; 17. air inlet pipe; 18. suction fan; 19. air collecting hood; 20. return air duct; 21. air supply fan; 22. return water pipe; 23. one-way valve; 24. cooling water inlet; 25. water connecting duct; 26. circulating water pump; 27. cooling water outlet; 28. circulating duct; 29. ​​stepping platform. DETAILED DESCRIPTION

[0029] The following embodiments of the technical solution of the present invention are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore only used as examples, and cannot be used to limit the protection scope of the present invention.

[0030] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by those skilled in the art to which the present invention belongs.

[0031] See also Figures 1 to 8The agricultural product heat pump drying room based on dew point dehumidification and energy recovery dehumidification comprises a base 1, a drying room 2 is arranged on the top of the base 1, a water pump 3 is fixedly installed on one side of the drying room 2, a heat pump unit 6 located at the rear side of the water pump 3 is fixedly installed on one side of the drying room 2, a water pump 4 connected to a groundwater well is fixedly installed on the water inlet end of the water pump 3, a water inlet pipe 5 is fixedly installed on the water outlet end of the water pump 3, the other end of the water inlet pipe 5 is fixedly installed with a cooling water inlet 24 of the heat pump unit 6, an air guide pipe 7 is fixedly installed on the bottom of the heat pump unit 6, a dispersion pipe 8 is fixedly installed on the bottom of the air guide pipe 7, an air nozzle 9 facing the inside of the drying room 2 is fixedly installed on the top of the dispersion pipe 8, an air intake pipe 17 is fixedly installed on the top of the drying room 2, and an air intake pipe 17 is fixedly installed on the top of the inside of the drying room 2. An air collecting hood 19 is fixedly installed at the bottom of the tube 17, and the other end of the air inlet pipe 17 is connected to the air inlet of the heat pump unit 6. By arranging the dispersion pipe 8 and the air inlet pipe 17, after the agricultural products to be dried are put into the drying room 2 through the door, the heat pump unit 6 is started, and the suction fan 18 sucks out the high-temperature and high-humidity air inside the drying room 2 through the air inlet pipe 17 through the air collecting hood 19. At the same time, the high-temperature and low-humidity hot air heated by the heat pump unit 6 is transported to the dispersion pipe 8 through the dispersion pipe 8, and then sprayed into the drying room 2 through the air nozzle 9. The evenly arranged multiple air nozzles 9 facilitate uniformly blowing the hot air into the drying room 2, ensuring uniform heating of the agricultural products in the drying room 2, avoiding large temperature differences inside it, and improving the drying effect of the agricultural products.

[0032] As an embodiment of the present invention, a hollow groove 10 located above the dispersion pipe 8 is opened on the top of the base 1, and a protective mesh cover 11 is fixedly installed on the top of the hollow groove 10, and the top of the protective mesh cover 11 is flush with the top of the base 1.

[0033] As an embodiment of the present invention, a buffer water tank 13 is fixedly installed on the top of the drying room 2, a dew point dehumidifier 16 located on the rear side of the buffer water tank 13 is fixedly installed on the top of the drying room 2, a water outlet pipe 12 located above the water pump 3 is fixedly installed on the front of the heat pump unit 6, and one side of the buffer water tank 13 is fixedly installed with the other end of the water outlet pipe 12.

[0034] As an embodiment of the present invention, a connecting duct 14 is fixedly installed on the rear side of the buffer water tank 13, the other end of the connecting duct 14 is fixedly installed on the dew point dehumidifier 16, a delivery water pump 15 is arranged in the middle of the connecting duct 14, one side of the dew point dehumidifier 16 is fixedly installed on the other end of the air inlet pipe 17, the air inlet pipe 17 is provided with an intake fan 18 located on one side of the dew point dehumidifier 16, a return air duct 20 located on the rear side of the air inlet pipe 17 is fixedly installed on the side of the dew point dehumidifier 16, the other end of the return air duct 20 is fixedly installed on the air inlet of the heat pump unit 6, and an air supply fan 21 is arranged at the connection between the return air duct 20 and the air inlet of the heat pump unit 6.

[0035] As an embodiment of the present invention, a cooling water inlet 24 located on one side of the air supply fan 21 is provided at the top of the heat pump unit 6, and a water receiving conduit 25 is fixedly installed on the cooling water inlet 24. The other end of the water receiving conduit 25 is fixedly installed with the middle part of the water outlet pipe 12, and a circulating water pump 26 is fixedly installed in the middle part of the water receiving conduit 25. A cooling water outlet 27 is provided on the top of the heat pump unit 6, and a circulating conduit 28 located above the heat pump unit 6 is fixedly installed on the cooling water outlet 27. The other end of the circulating conduit 28 is fixedly installed with the middle part of the water inlet pipe 5. By providing the water receiving conduit 25, the groundwater after heat exchange is discharged from the water outlet pipe 12, and the circulating water pump 26 extracts part of the low-temperature water from the water outlet pipe 12 through the water receiving conduit 25 and sends it to the cooling water inlet 24 to cool down the equipment inside the heat pump unit 6. The cooling water after absorbing heat is sent to the water inlet pipe 5 through the cooling water outlet 27 and the circulating conduit 28, thereby achieving the purpose of recycling the water discharged after heat exchange.

[0036] As an embodiment of the present invention, a return water pipe 22 located at the rear side of the return air duct 20 is fixedly installed on one side of the dew point dehumidifier 16, and the other end of the return water pipe 22 is fixedly installed on the middle part of the water inlet pipe 5. The connection between the return water pipe 22 and the water inlet pipe 5 is located in front of the connection between the circulation duct 28 and the water inlet pipe 5. A one-way valve 23 is arranged in the middle part of the return water pipe 22. By setting the return water pipe 22, when the dew point dehumidifier 16 cools down the high-temperature and high-humidity air extracted from the drying room 2, the water vapor in the air condenses, and the condensed water and the low-temperature water transported to the evaporator are transported to the water inlet pipe 5 again through the return water pipe 22, and after mixing with the groundwater extracted by the water pump 3, they are sent to the heat pump unit 6 for heat exchange again.

[0037] As an embodiment of the present invention, a gate is disposed on the other side of the drying room 2, and a stepping platform 29 is disposed on one side of the drying room 2 and is located below the gate. The width of the stepping platform 29 is greater than the width of the gate.

[0038] As an embodiment of the present invention, the heat pump unit 6 includes an air circulation heating mechanism, the bottom of the return air duct 20 is fixedly installed with the air inlet of the heating mechanism, the air guide pipe 7 is fixedly installed with the air inlet and outlet of the heating mechanism, the heat exchange mechanism inside the heat pump unit 6 provides a heat source for the heating mechanism, the dew point dehumidifier 16 is provided with an evaporator inside, the connecting conduit 14 is connected to the liquid inlet of the evaporator inside the dew point dehumidifier 16, the return water pipe 22 is connected to the liquid outlet of the evaporator inside the dew point dehumidifier 16, the heat pump unit 6 is provided with a cooling coil wrapped around the outside of the internal heating component, the cooling water inlet 24 and the cooling water outlet 27 are respectively connected to the two ends of the cooling coil, and by setting the heat pump unit 6, the heat pump unit 6 is working. Water is pumped from the water well through the pumping pipe 4 by the pumping pump 3, and is transported to the heat pump unit 6 through the water inlet pipe 5. The groundwater after heat exchange is discharged from the outlet pipe 12, and the groundwater after heat exchange flows into the buffer water tank 13 through the outlet pipe 12, and then the low-temperature water inside the buffer water tank 13 is transported to the evaporator inside the dew-point dehumidifier 16 by the delivery water pump 15, so that the high-temperature and high-humidity air transported into the dew-point dehumidifier 16 through the air inlet pipe 17 is cooled and dehumidified, and the low-temperature air after dehumidification is sent into the heat pump unit 6 through the return air pipe 20 for heating, so that the water discharged after heat exchange is recycled, which prevents a large amount of water resources from being wasted, is beneficial to the environmental protection of the device, and is convenient for directly utilizing the water source, thereby improving the convenience of the device.

[0039] As an implementation mode of the present invention, a plurality of dispersion pipes 8 are evenly laid inside the base 1 , and a plurality of air inlet pipes 17 are evenly arranged on the top inside the drying chamber 2 .

[0040] As an embodiment of the present invention, a pressure sensor is disposed inside the buffer water tank 13, and an insulation board is wrapped outside the buffer water tank 13.

[0041] It should be noted that when in use, after the agricultural products to be dried are placed into the drying room 2 through the door, the heat pump unit 6 is started, and the suction fan 18 sucks out the high-temperature and high-humidity air inside the drying room 2 through the air inlet pipe 17 through the air collecting hood 19. At the same time, the high-temperature and low-humidity hot air heated by the heat pump unit 6 is transported to the dispersion pipe 8 through the dispersion pipe 8, and then sprayed into the drying room 2 through the air nozzle 9. The evenly arranged multiple air nozzles 9 are convenient for evenly blowing the hot air into the drying room 2, ensuring the uniformity of the agricultural products in the drying room 2. The heat pump unit 6 is heated to avoid a large temperature difference inside the unit, thereby improving the drying effect of the agricultural products. When the heat pump unit 6 is working, water is pumped from the water well through the water pump 3 through the water pump pipe 4, and is transported to the heat pump unit 6 through the water inlet pipe 5. The groundwater after heat exchange is discharged from the water outlet pipe 12, and the groundwater after heat exchange flows into the buffer water tank 13 through the water outlet pipe 12. The low-temperature water inside the buffer water tank 13 is then transported to the evaporator inside the dew point dehumidifier 16 through the water delivery pump 15, so that the low-temperature water is transported to the dew point dehumidifier 16 through the air inlet pipe 17. 6 is cooled and dehumidified, and the low-temperature air after dehumidification is sent into the heat pump unit 6 through the return air duct 20 for heating, so that the water discharged after heat exchange is recycled, which prevents a large amount of water resources from being wasted, is beneficial to the environmental protection of the device, and is convenient for directly utilizing the water source, thereby improving the convenience of the device. The groundwater after heat exchange is discharged from the outlet pipe 12, and the circulating water pump 26 extracts part of the low-temperature water from the outlet pipe 12 through the water receiving conduit 25 and sends it to the cooling water inlet 24 to cool the equipment inside the heat pump unit 6. The cooling water after absorbing heat is sent to the water inlet pipe 5 through the cooling water outlet 27 and the circulating conduit 28, so as to achieve the purpose of recycling the water discharged after heat exchange. When the dew point dehumidifier 16 cools the high-temperature and high-humidity air extracted from the drying room 2, the water vapor in the air condenses, and the condensed water and the low-temperature water transported to the evaporator are transported to the inlet pipe 5 again through the return water pipe 22, and after mixing with the groundwater extracted by the pump 3, they are sent to the heat pump unit 6 for heat exchange again.

[0042] The main principle of the heat pump equipment based on dew point dehumidification in this embodiment is to use the heat pump evaporator to absorb the latent heat of moisture in the material in the air in the drying room and realize condensation dehumidification. The absorbed heat enters the heat exchanger through the work of the compressor and is converted into hot air through the fan. The hot air is repeatedly circulated in the drying room for heating, moisture absorption, and condensation, and finally the material is dried; the sensible heat and latent heat in the warm and humid air discharged from the drying room are effectively utilized, and only a small amount of electricity is consumed to drive the heat pump unit to work. Compared with ordinary electric drying and gas drying, 60-70% of energy consumption costs can be saved, and it is more energy-efficient than traditional dryers such as oil-fired drying, coal-fired drying, gas-fired drying, electric heating, and infrared drying.

[0043] In terms of the drying technology effect of materials, during the operation of the equipment, the evaporation rate of the moisture on the surface of the material and the migration rate of the internal moisture to the surface are close to natural drying, which can meet the high-quality drying requirements of most heat-sensitive materials, make them have good color and high activity, and retain the effective ingredients to the maximum extent without loss. During use, the temperature and humidity of the drying chamber can also be scientifically adjusted according to the material requirements to fully meet the material's requirements for texture, appearance, etc., and the drying conditions are more stable and the drying quality is more guaranteed. Since the drying medium of the equipment is always circulating in a closed system, there is no pollution caused by material dust, volatile substances and odors discharged into the environment with the drying exhaust gas. The waste heat in the exhaust gas of the drying chamber is directly recycled by the heat pump, and there is no heat pollution from the unit to the environment. The sanitation and safety of the materials are environmentally friendly, and the sanitation and safety of the materials are more guaranteed.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. A heat pump drying room for agricultural products based on dew point dehumidification and energy recovery dehumidification, comprising a base (1), characterized in that: A drying room (2) is arranged on the top of the base (1), a water pump (3) is fixedly installed on one side of the drying room (2), a heat pump unit (6) located at the rear side of the water pump (3) is fixedly installed on one side of the drying room (2), a water pump pipe (4) connected to an underground water well is fixedly installed at the water inlet end of the water pump (3), a water inlet pipe (5) is fixedly installed at the water outlet end of the water pump (3), and the other end of the water inlet pipe (5) is fixedly connected to the cooling water inlet (24) of the heat pump unit (6). The heat pump unit (6) is installed with an air guide pipe (7) fixedly installed at the bottom, a dispersion pipe (8) fixedly installed at the bottom of the air guide pipe (7), an air nozzle (9) facing the inside of the drying room (2) fixedly installed at the top of the dispersion pipe (8), an air intake pipe (17) fixedly installed at the top of the drying room (2), an air collecting hood (19) fixedly installed at the bottom of the air intake pipe (17), and the other end of the air intake pipe (17) is connected to the air intake port of the heat pump unit (6).

2. The agricultural product heat pump drying room based on dew point dehumidification and energy recovery dehumidification according to claim 1 is characterized by: The top of the base (1) is provided with an empty slot (10) located above the dispersion pipe (8), and a protective mesh cover (11) is fixedly installed on the top of the empty slot (10), and the top of the protective mesh cover (11) is arranged flush with the top of the base (1).

3. The agricultural product heat pump drying room based on dew point dehumidification and energy recovery dehumidification according to claim 1 is characterized in that: A buffer water tank (13) is fixedly mounted on the top of the drying room (2), a dew point dehumidifier (16) located at the rear side of the buffer water tank (13) is fixedly mounted on the top of the drying room (2), a water outlet pipe (12) located above the water pump (3) is fixedly mounted on the front of the heat pump unit (6), and one side of the buffer water tank (13) is fixedly mounted to the other end of the water outlet pipe (12).

4. The agricultural product heat pump drying room based on dew point dehumidification and energy recovery dehumidification according to claim 3 is characterized in that: A connecting duct (14) is fixedly installed on the rear side of the buffer water tank (13), the other end of the connecting duct (14) is fixedly installed on the dew-point dehumidifier (16), a water delivery pump (15) is arranged in the middle of the connecting duct (14), one side of the dew-point dehumidifier (16) is fixedly installed on the other end of the air inlet pipe (17), the air inlet pipe (17) is provided with an air intake fan (18) located on one side of the dew-point dehumidifier (16), a return air duct (20) located on the rear side of the air inlet pipe (17) is fixedly installed on the side of the dew-point dehumidifier (16), the other end of the return air duct (20) is fixedly installed on the air inlet of the heat pump unit (6), and an air supply fan (21) is arranged at the connection between the return air duct (20) and the air inlet of the heat pump unit (6).

5. The agricultural product heat pump drying room based on dew point dehumidification and energy recovery dehumidification according to claim 4 is characterized in that: The top of the heat pump unit (6) is provided with a cooling water inlet (24) located on one side of the air supply fan (21); the cooling water inlet (24) is fixedly installed with a water receiving conduit (25); the other end of the water receiving conduit (25) is fixedly installed with the middle part of the water outlet pipe (12); the middle part of the water receiving conduit (25) is fixedly installed with a circulating water pump (26); the top of the heat pump unit (6) is provided with a cooling water outlet (27); the cooling water outlet (27) is fixedly installed with a circulating conduit (28) located above the heat pump unit (6); the other end of the circulating conduit (28) is fixedly installed with the middle part of the water inlet pipe (5).

6. The agricultural product heat pump drying room based on dew point dehumidification and energy recovery dehumidification according to claim 5 is characterized by: A water return pipe (22) located at the rear side of the return air pipe (20) is fixedly installed on one side of the dew point dehumidifier (16); the other end of the water return pipe (22) is fixedly installed on the middle part of the water inlet pipe (5); the connection between the water return pipe (22) and the water inlet pipe (5) is located in front of the connection between the circulation duct (28) and the water inlet pipe (5); and a one-way valve (23) is provided in the middle part of the water return pipe (22).

7. The agricultural product heat pump drying room based on dew point dehumidification and energy recovery dehumidification according to claim 1 is characterized by: A gate is arranged on the other side of the drying room (2), and a stepping platform (29) located below the gate is arranged on one side of the drying room (2), wherein the width of the stepping platform (29) is greater than the width of the gate.

8. The agricultural product heat pump drying room based on dew point dehumidification and energy recovery dehumidification according to claim 6 is characterized by: The heat pump unit (6) includes an air circulation heating mechanism, the bottom of the return air duct (20) is fixedly installed with the air inlet of the heating mechanism, the air guide duct (7) is fixedly installed with the air inlet and outlet of the heating mechanism, the heat exchange mechanism inside the heat pump unit (6) provides a heat source for the heating mechanism, an evaporator is arranged inside the dew point dehumidifier (16), the connecting conduit (14) is connected to the liquid inlet of the evaporator inside the dew point dehumidifier (16), the return water pipe (22) is connected to the liquid outlet of the evaporator inside the dew point dehumidifier (16), and a cooling coil wrapped around the outside of the internal heat-generating component is arranged inside the heat pump unit (6), and the cooling water inlet (24) and the cooling water outlet (27) are respectively connected to the two ends of the cooling coil.

9. The agricultural product heat pump drying room based on dew point dehumidification and energy recovery dehumidification according to claim 1 is characterized in that: A plurality of the dispersion pipes (8) are evenly laid inside the base (1), and a plurality of the air inlet pipes (17) are evenly arranged on the top inside the drying room (2).

10. The agricultural product heat pump drying room based on dew point dehumidification and energy recovery dehumidification according to claim 4 is characterized in that: A pressure sensor is arranged inside the buffer water tank (13), and an insulation board is wrapped around the outside of the buffer water tank (13).

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