Low-energy-consumption agricultural drying device

Abstract

The utility model relates to the technical field of agricultural drying, and provides a low-energy-consumption agricultural drying device which comprises a solar air heat collector, a first air energy pump, a drying box and a control assembly, an air outlet of the solar air heat collector is connected with the drying box, the drying box is provided with an exhaust pipe, and the exhaust pipe is connected with a first air source heat pump; an air outlet of the first air source heat pump is connected with the drying box; the control assembly is used for controlling starting and stopping of the solar air heat collector and the first air source heat pump. The low-energy-consumption agricultural drying device aims to reduce energy loss.

Description

Technical Field

[0001] The present application relates to the technical field of agricultural drying, and in particular to a low-energy consumption agricultural drying device. Background Art

[0002] In the industrial, agricultural and food industries, materials often need to be dried to ensure the quality of storage and use. At present, when drying agricultural products, hot air is usually passed into the drying box; and in order to reduce heat waste, the air with residual heat discharged from the drying box is reheated and passed into the drying box.

[0003] However, in order to reduce the reaction between hot air and agricultural products after repeated heating, fresh air needs to be added and the air with residual heat discharged from the drying box is heated to a certain temperature before being re-introduced into the drying box. Since the temperature of fresh air is relatively low, it takes a long time to heat the fresh air and the air with residual heat in the drying box to a certain temperature, resulting in greater energy loss. Utility Model Content

[0004] In order to reduce energy loss, the present application provides a low-energy agricultural drying device.

[0005] The low-energy agricultural drying device provided in this application adopts the following technical solution:

[0006] A low-energy agricultural drying device includes a solar air collector, a first air source heat pump, a drying box and a control component, wherein the air outlet of the solar air collector is connected to the drying box, the drying box is provided with an exhaust duct, and the exhaust duct is connected to the first air source heat pump; the air outlet of the first air source heat pump is connected to the drying box; the control component is used to control the opening and closing of the solar air collector and the first air source heat pump.

[0007] By adopting the above technical solution, under the control of the control component, the device sends hot air into the drying box by the solar air collector. After the drying process, the cooling gas discharged from the inside of the drying box is absorbed by the first air source heat pump and heated again, and then input into the drying box again, forming a cycle of heating-drying-cooling-reheating. In this way, the advantages of the solar air collector can be fully utilized, that is, the heat input by the solar collector will not be discharged after completing a cycle, resulting in the heat that is not completely released being discharged into the environment and causing waste; and for the first air source heat pump, the temperature of the air entering the first air source heat pump from the drying box is higher than the ambient temperature, which effectively reduces the energy consumption of the first air source heat pump, and compared with the air source heat pump directly heating the ambient air, it can increase the temperature of the air heated by the air source heat pump, that is, increase the temperature in the drying box, and improve the drying efficiency.

[0008] Optionally, the solar air collector includes a heat collection bracket and a double straight-through vacuum heat collection tube installed on the heat collection bracket and two air flow channels, one of the air flow channels is connected to a drying box, and the other air flow channel is installed with an exhaust fan; the two ends of the double straight-through vacuum heat collection tube are respectively connected to the two air flow channels.

[0009] By adopting the above technical solution and setting up double straight-through vacuum collector tubes, when the equipment is in operation, air flows in a unidirectional direct current along the inside of the double straight-through vacuum collector tubes. Compared with the original U-shaped vacuum collector tubes, the reciprocating flow of air is smoother and the resistance is smaller, thereby reducing the overall pipeline resistance during system operation, reducing the operating pressure of the system and improving operating safety.

[0010] Optionally, the exhaust fan is equipped with a filter, and the filter covers the air inlet of the exhaust fan.

[0011] By adopting the above technical solution and setting a filter, it is possible to reduce the dust content in the air drawn into the double straight-through vacuum heat collecting tubes by the exhaust fan, thereby reducing the possibility of the heat collecting tubes being blocked by dust.

[0012] Optionally, the exhaust fan is provided with a mounting groove, in which a frame is inserted; the filter is installed on the frame, and a rubber layer is provided on an outer wall of the frame.

[0013] By adopting the above-mentioned technical solution, the frame and the installation groove are plugged in and matched, so that the filter can be removed from the exhaust fan for cleaning to maintain the filtering effect of the filter on the air; and by providing a rubber layer, the friction between the frame and the inner wall of the installation groove can be increased, thereby reducing the possibility of the frame detaching from the installation groove.

[0014] Optionally, both ends of the installation slot are connected to both sides of the shell, a cover plate is hinged on one side of the shell, and the exhaust fan is installed with a fixing component for making the cover plate normally cover the surface of the installation slot.

[0015] By adopting the above-mentioned technical solution and setting up an installation groove, when the filter in the exhaust fan is updated, the frame with the new filter is inserted into the installation groove. At this time, the frame with the new filter abuts against the frame in the exhaust fan, so that the frame in the exhaust fan can be pushed out of the installation groove to the outside world; the filter can be replaced during the use of the exhaust fan, thereby improving the working efficiency of the device.

[0016] Optionally, the fixing assembly includes a fixing block and a second spring, the cover plate is provided with a first fixing groove, and the fixing block is movably installed in the first fixing groove; the second spring is installed between the inner wall of the first fixing groove and the fixing block, and the second spring is maintained in a compressed state; the exhaust fan is provided with a second fixing groove for plugging the fixing block.

[0017] By adopting the above technical solution and setting a fixing component, the cover plate can normally cover the installation slot, reducing the possibility of the frame detaching from the installation slot to the outside, and maintaining the filtering effect of the filter on the exhaust fan.

[0018] Optionally, it further includes a second air source heat pump, wherein the air inlet of the second air source heat pump is connected to the outside, and the air outlet of the second air source heat pump is connected to the drying box.

[0019] By adopting the above technical solution, on cloudy days / at night, the second air source heat pump can heat the ambient air and pass it into the drying box to heat the agricultural products; and the air with waste heat in the drying box that heats the agricultural products is reheated and utilized by the first air source heat pump, further reducing energy loss.

[0020] Optionally, the outer wall of the drying box is provided with a heat-insulating layer.

[0021] By adopting the above technical solution and providing a heat-insulating layer, the shell can be insulated, the heat dissipation to the outside can be reduced, and the heat loss can be reduced.

[0022] In summary, the present application includes at least one of the following beneficial technical effects:

[0023] 1. When the device is in operation, the heat collected by the solar air energy collector is fully utilized. The heating-drying-cooling-reheating cycle formed by the first air source heat pump and the drying room avoids the waste of heat collected by solar energy, while improving the efficiency (COP) of the first air source heat pump, effectively reducing the energy consumption cost of the overall system;

[0024] 2. By setting up a straight-through vacuum heat collection tube, the upper and lower ends of which are respectively connected to air flow channels, the air can flow along the single-phase direct current inside the vacuum heat collection tube when the device is running, effectively reducing the pipeline resistance when the device is running. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a partial cross-sectional view of the housing of Example 1;

[0026] Figure 2 is a schematic structural diagram of the exhaust fan of Example 2;

[0027] Figure 3 is a partial cross-sectional view of the exhaust fan of Example 2;

[0028] Figure 4 yes Figure 3 A local enlarged view of point A;

[0029] Figure 5This is a partial cross-sectional view of the cover plate of Example 2.

[0030] Explanation of the reference numerals: 1. solar air collector; 11. collector bracket; 12. air flow channel; 13. double straight-through vacuum collector tube; 14. air supply pipe; 2. first air source heat pump; 21. first air outlet pipe; 3. drying box; 4. shell; 5. exhaust fan; 51. mounting shell; 52. fan blade; 53. mounting slot; 54. snap-in slot; 55. blocking slot; 56. cover plate; 6. frame; 61. filter screen; 62. movable slot; 63. snap-in block; 64. first spring; 65. rubber layer; 7. second air source heat pump; 71. second air inlet pipe; 8. fixing assembly; 81. fixing block; 82. second spring; 83. unlocking lever; 84. first fixing slot; 85. second fixing slot; 86. unlocking slot. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1-5 This application is described in further detail. Example 1

[0032] The embodiment of the present application discloses a low-energy agricultural drying device.

[0033] Reference Figure 1 A low-energy agricultural drying device includes a solar air collector 1, a first air source heat pump 2, a second air source heat pump 7, a drying box 3, a control component and a shell 4. The control component is used to control the opening and closing of the solar air collector 1, the first air source heat pump 2 and the second air source heat pump 7. The drying box 3, the first air source heat pump 2 and the second air source heat pump 7 are all installed in the shell 4.

[0034] The solar air heat collector includes a heat collecting bracket 11, two air flow channels 12, a plurality of double straight-through vacuum heat collecting tubes 13 and two air flow channels 12; the two air flow channels 12 are installed on both sides of the width of the heat collecting bracket 11, one of the air flow channels 12 is installed with an exhaust fan 5, and the exhaust fan 5 is used to transport outside air into the air flow channel 12; the other air flow channel 12 is connected to the drying box 3 through a conveying pipe penetrating the shell 4, and is used to transport hot air into the drying box 3.

[0035] All the double straight vacuum heat collecting tubes 13 are arranged at intervals along the length direction between the heat collecting tubes, and the two ends of the double straight vacuum heat collecting tubes 13 are respectively connected to the two air flow channels 12; the direct flow resistance of air entering the double straight vacuum heat collecting tubes 13 from the air flow channels 12 is small, which reduces the pipeline resistance of the solar collector and reduces safety hazards;

[0036] The drying box 3 is provided with a heat-insulating layer. In this embodiment, the heat-insulating layer is made of glass fiber material, which can reduce the diffusion of heat in the shell 4 to the outside and reduce heat loss.

[0037] The first air source heat pump 2 is provided with a first air inlet pipe and a first air outlet pipe 21 , and both the first air inlet pipe and the first air outlet pipe 21 are connected to the drying box 3 .

[0038] The second air source heat pump 7 is provided with a second air inlet pipe 71 and a second air outlet pipe. The second air inlet pipe 71 runs through the shell 4 and is connected to the outside, and the second air outlet pipe is connected to the drying box 3. On cloudy days / at night, the second air source heat pump 7 can heat the ambient air and pass it into the drying box 3 to heat the agricultural products, and the first air source heat pump 2 reheats and utilizes the waste heat to further reduce energy loss.

[0039] In other embodiments, a dehumidification component is arranged between the first air source heat pump 2 and the drying box 3, and the dehumidification component includes a condenser and a dehumidification pipe. The condenser is used to condense water in the air entering the first air source heat pump 2 from the drying box 3, and discharge it to the outside through the dehumidification pipe, so as to reduce the water vapor from drying the agricultural products and return it from the first air source heat pump 2 to the drying box 3, thereby improving the drying efficiency.

[0040] The implementation principle of Example 1 of the present application is:

[0041] Under the control of the control component, the solar air collector 1 sends hot air into the drying box 3. After the drying process, the cooling gas discharged from the drying box 3 is absorbed by the first air source heat pump 2 and heated again, and then input into the drying box 3 again, forming a cycle of heating-drying-cooling-reheating. The heat input by the solar collector will not be discharged after completing a cycle, resulting in the heat that is not completely released being discharged into the environment and causing waste; and for the first air source heat pump 2, the temperature of the air entering the first air source heat pump 2 from the drying box 3 is higher than the ambient temperature, which effectively reduces the energy consumption of the first air source heat pump 2. Compared with the first air source heat pump 2 directly heating the ambient air, it can increase the temperature of the air heated by the air source heat pump, that is, it can increase the temperature in the drying box 3 and improve the drying efficiency. Example 2

[0042] The embodiment of the present application discloses a low-energy agricultural drying device.

[0043] Reference Figure 2 and Figure 3The difference between the embodiment 2 of the present application and the embodiment 1 is that the exhaust fan 5 includes a mounting shell 51, a blade 52 and a motor, and the mounting shell 51 is connected to the air flow channel 12; the blade 52 is rotatably mounted in the mounting shell 51, and the motor is installed in the mounting shell 51 to drive the blade 52 to rotate. The side wall of the mounting shell 51 is provided with a mounting slot 53, and the mounting slot 53 is connected to the inside of the mounting shell 51; the mounting slot 53 is plugged with a frame 6, and the frame 6 is fixed with a filter 61; by setting the filter 61, the dust in the air can be filtered to keep the gas clean; and the filter 61 can be replaced by pulling the frame 6 out of the mounting slot 53.

[0044] Reference Figure 4 The outer wall of the frame 6 is provided with a movable groove 62, and a clamping block 63 is movably installed in the movable groove 62. The clamping block 63 and the inner wall of the movable groove 62 are provided with a first spring 64, and the elastic force of the first spring 64 drives the clamping block 63 to move toward the side away from the movable groove 62; the inner wall of the installation groove 53 is provided with a clamping groove 54 for the clamping block 63 to be inserted; the cooperation between the clamping block 63 and the clamping groove 54 can reduce the situation that the frame 6 is separated from the installation groove 53. In this embodiment, a guide surface is provided on the side of the clamping block 63 close to the installation groove 53, and the guide surface is used to guide the clamping block 63 into the clamping groove 54.

[0045] The outer wall of the frame 6 is provided with a rubber layer 65 for increasing the friction between the frame 6 and the inner wall of the installation groove 53 , and further reducing the possibility of the frame 6 being separated from the installation groove 53 .

[0046] The two sides of the mounting groove 53 are respectively connected with the two sides of the shell 4; the mounting shell 51 is provided with a blocking groove 55, which is connected with the mounting groove 53; the mounting shell 51 is hinged with a cover plate 56, and the mounting shell 51 is provided with a fixing component 8 for making the cover plate 56 normally cover the surface of the blocking groove 55.

[0047] When replacing the filter 61 of the exhaust fan 5, the frame 6 with the new filter 61 is inserted into the installation groove 53 and abutted against the old frame 6 in the installation groove 53, so that the old frame 6 is subjected to force and the clamping block 63 enters the movable groove 62 under the guidance of the guide surface, thereby enabling the old frame 6 to be detached from the installation groove 53; thereby, the filter 61 can be replaced during the use of the exhaust fan 5, thereby improving the working efficiency of the device.

[0048] Reference Figure 5The fixing assembly 8 includes a fixing block 81, a second spring 82 and an unlocking rod 83. The cover plate 56 is provided with a first fixing groove 84, and the fixing block 81 is movably installed in the second fixing groove 85; the two ends of the second spring 82 are respectively connected to the fixing block 81 and the inner wall of the first fixing groove 84, and the elastic force of the second spring 82 drives the fixing block 81 to move toward the side away from the first fixing groove 84; the surface of the cover plate 56 is provided with an unlocking groove 86, and the unlocking groove 86 is connected with the first fixing groove 84, and the unlocking rod 83 is fixed to the fixing block 81 and exposed to the outside through the unlocking groove 86; the inner wall of the blocking groove 55 is provided with a second fixing groove 85 for the fixing block 81 to be plugged in.

[0049] The plug-in cooperation between the fixing block 81 and the second fixing groove 85 can make the cover plate 56 normally cover the installation groove 53, reduce the situation that the frame 6 is separated from the installation groove 53 to the outside, and maintain the filtering effect of the filter screen 61 on the exhaust fan 5. By moving the unlocking rod 83 to the position in the unlocking groove 86 to cancel the plug-in of the fixing block 81 and the second fixing groove 85,

[0050] The above are preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A low energy consumption agricultural drying device, characterized in that: The invention comprises a solar air heat collector (1), a first air energy pump, a drying box (3) and a control component, wherein the air outlet of the solar air heat collector (1) is connected to the drying box (3), the drying box (3) is provided with an exhaust pipe, and the exhaust pipe is connected to the first air source heat pump (2); the air outlet of the first air source heat pump (2) is connected to the drying box (3); and the control component is used to control the opening and closing of the solar air heat collector (1) and the first air source heat pump (2).

2. A low energy consumption agricultural drying device according to claim 1, characterized in that: The solar air heat collector (1) comprises a heat collection bracket (11), a double straight-through vacuum heat collection tube (13) mounted on the heat collection bracket (11), and two air flow channels (12), wherein one of the air flow channels (12) is connected to a drying box (3), and the other of the air flow channels (12) is equipped with an exhaust fan (5); both ends of the double straight-through vacuum heat collection tube (13) are respectively connected to the two air flow channels (12).

3. A low energy consumption agricultural drying device according to claim 2, characterized in that: The exhaust fan (5) is installed with a filter screen (61), and the filter screen (61) covers the air inlet of the exhaust fan (5).

4. A low energy consumption agricultural drying device according to claim 3, characterized in that: The exhaust fan (5) is provided with a mounting groove (53), and a frame (6) is inserted into the mounting groove (53); the filter screen (61) is installed on the frame (6), and a rubber layer (65) is provided on the outer wall of the frame (6).

5. A low energy consumption agricultural drying device according to claim 4, characterized in that: The two ends of the installation groove (53) are connected to the two sides of the shell (4); a cover plate (56) is hingedly connected to one side of the shell (4); and the exhaust fan (5) is provided with a fixing component (8) for allowing the cover plate (56) to normally cover the surface of the installation groove (53).

6. A low energy consumption agricultural drying device according to claim 5, characterized in that: The fixing assembly (8) comprises a fixing block (81) and a second spring (82); the cover plate (56) is provided with a first fixing groove (84); the fixing block (81) is movably mounted in the first fixing groove (84); the second spring (82) is mounted between the inner wall of the first fixing groove (84) and the fixing block (81); the second spring (82) is kept in a compressed state; and the exhaust fan (5) is provided with a second fixing groove (85) for plugging the fixing block (81) therein.

7. A low energy consumption agricultural drying device according to claim 1, characterized in that: It also comprises a second air source heat pump (7), wherein the air inlet of the second air source heat pump (7) is connected to the outside, and the air outlet of the second air source heat pump (7) is connected to the drying box (3).

8. A low energy consumption agricultural drying device according to claim 1, characterized in that: The outer wall of the drying box (3) is provided with a heat-insulating layer.

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