Intelligent temperature control and ventilation integrated device for granary

Abstract

The utility model relates to the technical field of granary grain storage, and discloses an intelligent temperature control and ventilation integrated device for a granary, which is used on the granary for storing grain piles, an air return duct is arranged on the granary, the air return duct is communicated with the space above the grain piles in the granary, a ventilation ground cage is arranged at the bottom of the granary, and a special air conditioning unit and a return air switching box are arranged outside the granary. An air outlet switching box is arranged in the granary, an air return opening of the special air conditioning unit is communicated with the air return duct or the external atmospheric environment through the air return switching box, an air outlet of the special air conditioning unit is communicated with the air outlet switching box, the air outlet switching box is communicated with the ventilation ground cage or the space above a grain pile in the granary, and the air return duct is higher than the air outlet switching box. The air duct connected with the special air conditioning unit is optimized, the three functions of grain surface temperature control in summer, grain pile cooling in summer and mechanical ventilation in winter can be achieved by switching the communication trend of the air duct, and the effect that one set of equipment has multiple working modes is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of grain storage in granaries, and in particular to an intelligent temperature control and ventilation integrated device for granaries. Background Art

[0002] A key point in grain storage is to control the temperature inside the grain warehouse. Only the appropriate temperature can keep the grain for a longer time. Usually, in the autumn and winter when the temperature is lower, it is suitable to use mechanical ventilation to cool the grain pile so that the grain can safely survive the winter at a lower temperature. In the spring and summer, due to the high external temperature, the temperature of the grain pile and grain surface gradually rises. At this time, it is necessary to choose different ventilation and cooling methods according to the actual temperature of the grain pile and grain surface to achieve the purpose of grain surface temperature control or grain pile cooling.

[0003] In view of the working environment of granaries, special air conditioners for granaries have been developed. However, the existing special air conditioners for granaries are only installed outside the granaries, and heat is exchanged through simple air ducts. Therefore, they can only cool the upper space of the granary pile, which is not much different from the traditional household air conditioners installed in the granary. It is not possible to cool the upper space of the grain pile and the inside of the grain pile in the summer. And even if the granary is equipped with a special air conditioner for granaries, it still needs to rely on manual handling of mobile fans to achieve winter ventilation and cooling when mechanically ventilated in winter, which is cumbersome to operate and poses safety hazards.

[0004] In actual application, grain warehouse custodians need to use different equipment to cool and ventilate the granary according to the difference in ambient temperature in summer and winter. It is imperative to promote the invention of an integrated device that can meet multiple granary cooling modes such as "summer grain surface temperature control / summer grain pile cooling / winter mechanical ventilation". Utility Model Content

[0005] In view of the problems existing in the prior art: the existing granary cooling equipment has a single function and cannot meet the needs of summer grain surface temperature control, summer grain pile cooling and winter mechanical ventilation with one set of equipment. The purpose of the utility model is to provide a granary intelligent temperature control and ventilation integrated device, which can realize the three functions of summer grain surface temperature control, summer grain pile cooling and winter mechanical ventilation by optimizing the air duct connected to the special air-conditioning unit and arranging a valve plate that can be opened or closed in the air duct, so as to achieve the effect of one set of equipment having multiple working modes.

[0006] In order to achieve the above object, the technical solution of the utility model is:

[0007] A granary intelligent temperature control and ventilation integrated device is used for a granary for storing grain piles, wherein the granary is provided with a return air duct, the return air duct is connected to the space above the grain pile in the granary, a ventilation cage is provided at the bottom of the granary, a special air-conditioning unit and a return air switching box are provided outside the granary, an air outlet switching box is provided inside the granary, the return air switching box connects the return air outlet of the special air-conditioning unit with the return air duct or the external atmospheric environment, the air outlet of the special air-conditioning unit is connected to the air outlet switching box, the air outlet switching box is connected to the ventilation cage or the space above the grain pile in the granary, and the height of the return air duct is higher than the air outlet switching box.

[0008] The utility model is further configured as follows: a return air duct switching plate is provided on the return air switching box, one end of the return air duct switching plate is hinged on the return air switching box, the return air duct switching plate is rotated to open or block the connecting passage between the return air switching box and the external atmospheric environment, and the return air duct switching plate can simultaneously open or block the connecting passage between the return air switching box and the return air duct.

[0009] The utility model is further configured as follows: a communication channel between the return air switching box and the external atmospheric environment is located at the bottom of the return air switching box.

[0010] The utility model is further configured that: the return air duct switching plate is driven by a motor or directly controlled by manpower.

[0011] The utility model is further configured as follows: an air outlet duct switching plate is provided on the air outlet switching box, one end of the air outlet duct switching plate is hinged to the air outlet switching box, the air outlet duct switching plate is rotated to open or block the connecting passage between the air outlet switching box and the space above the grain pile in the granary, and the air outlet duct switching plate can simultaneously open or block the connecting passage between the air outlet switching box and the ventilation cage.

[0012] The utility model is further configured that: the air outlet duct switching plate is driven by a motor or directly controlled by manpower.

[0013] The utility model is further configured as follows: the return air switching box and the outlet air switching box are both made of stainless steel.

[0014] The utility model is further configured as follows: a heat preservation layer is arranged on the communication passage between the air outlet of the special air-conditioning unit and the air outlet switching box.

[0015] The utility model is further configured as follows: the controller controls the motor to drive the return air duct switching plate to move.

[0016] The utility model is further configured that: the controller controls the motor to drive the air outlet duct switching plate to move.

[0017] In summary, the beneficial effects achieved by the present invention are as follows:

[0018] (1) By setting up a return air switching box and an outlet air switching box, the return air outlet of the dedicated air conditioning unit can absorb cold air from the external atmosphere in winter or absorb hot air from the space above the grain pile in the granary through the return air duct in summer. The outlet air switching box blows the air cooled or pressurized by the dedicated air conditioning unit into the ventilation cage or the space above the grain pile in the granary, thereby achieving the effect of absorbing hot air from the granary in summer and cooling it with the dedicated air conditioning unit or absorbing cold air from the external atmosphere in winter and pressurizing it with the dedicated air conditioning unit and blowing it into the space above the grain pile in the granary to control the grain surface temperature, or blowing cold air into the ventilation cage and then blowing it into the grain pile through the air holes on the ventilation cage to achieve cooling and ventilation of the grain pile. The cooperation of the return air switching box and the outlet air switching box with the dedicated air conditioning unit can achieve the effect of a set of equipment having multiple working modes;

[0019] (2) Both the return air switch box and the outlet air switch box open or block the channels connected thereto by rotating the switch plates hinged on the corresponding switch boxes, thereby switching the connecting channels. The switch boxes have the advantages of simple and reliable structure, low cost, high reliability and low failure rate;

[0020] (3) The return air duct switch plate and the outlet air duct switch plate can be directly controlled by manpower or by a motor through a controller, thus realizing remote and automatic control. There is no need to manually connect power cords, outlet and return air ducts, etc., thus saving labor costs and eliminating safety hazards for relevant personnel during operation.

[0021] (4) The return air switch box and the outlet air switch box are made of stainless steel, which can prevent the hot and humid air in the granary and the corrosion of the return air switch box and the outlet air switch box during the fumigation period of the granary, prolong the service life, and the after-sales maintenance is relatively simple;

[0022] (5) The insulation layer installed on the connecting channel between the air outlet of the dedicated air-conditioning unit and the air outlet switching box can effectively reduce the loss of cold air, improve the cooling effect of the granary and reduce energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the specification will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0024] Figure 1 This is a structural schematic diagram of an intelligent temperature control and ventilation integrated device for a granary in Embodiment 1 of the present utility model;

[0025] Figure 2 This is a schematic diagram of the structure of the return air channel and the outlet air channel in the first embodiment of the utility model;

[0026] Figure 3 This is a structural schematic diagram of an intelligent temperature control and ventilation integrated device for a granary in Embodiment 2 of the present utility model;

[0027] Figure 4 This is a schematic diagram of the structure of the return air channel and the outlet air channel in the second embodiment of the present utility model;

[0028] Figure 5 This is a schematic diagram of the structure of the intelligent temperature control and ventilation integrated device for granary in the third embodiment of the utility model;

[0029] Figure 6 It is a schematic diagram of the structure of the return air channel and the outlet air channel in the third embodiment of the present utility model.

[0030] In the figure: 1. Outer wall of granary; 2. Special air-conditioning unit; 21. Air-conditioning bracket; 3. Vertical pipe of granary; 4. Ventilation cage; 5. Return air channel; 51. Return air box; 52. Return air duct; 53. Return air switching box; 54. Return air duct switching plate; 6. Outlet channel; 61 Outlet duct; 62. Outlet air switching box; 63. Outlet duct switching plate; 7. Grain pile. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention are described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. For ease of explanation, the terms "vertical", "horizontal", "left", "right", "upper", "lower", "inner", "outer", "bottom", etc. used in this specification indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present application.

[0032] It should be noted that the embodiments of the present invention and the features involved in the embodiments can be combined with each other without conflict. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0033] Embodiment 1

[0034] As attached Figure 1-2 As shown, a granary intelligent temperature control and ventilation integrated device is used on a granary for storing grain piles 7.

[0035] The storage of grain in a granary needs to ensure ventilation inside the granary under the premise of ensuring protection from rain and moisture. Therefore, existing granaries, such as the widely used shallow round silos, form a closed space through the granary outer wall 1 on the side and top surface, and a plurality of ventilating holes are arranged on the top for ventilation. In addition, a ventilation cage 4 is generally arranged at the bottom of the granary. The ventilation cage 4 is an existing structure with many small air holes distributed thereon, which is used to improve the ventilation effect at the bottom of the grain pile 7.

[0036] The above-mentioned granary intelligent temperature control and ventilation integrated device includes a special air-conditioning unit 2, a granary vertical pipe 3, a return air channel 5 and an air outlet channel 6.

[0037] The dedicated air conditioning unit 2 is an air conditioner in the prior art that is specially used for cooling the granary. It adopts professional anti-corrosion design and manufacturing, so that there is no need to worry about the equipment being corroded even when the unit is used during the fumigation of the entire granary. The dedicated air conditioning unit 2 is provided with a return air port and an air outlet spaced a certain distance apart. The compressor inside the dedicated air conditioning unit 2 works, and the hot air enters the evaporator of the dedicated air conditioning unit 2 from the return air port for heat exchange. The cold air formed after the heat exchange is blown into the granary through the air outlet by the booster fan provided in the dedicated air conditioning unit 2, thereby achieving the effect of cooling and refrigeration. The dedicated air conditioning unit 2 is fixedly mounted on the outer wall 1 of the granary outside the granary through the air conditioning bracket 21.

[0038] The return air duct 5 can guide the hot air in the space above the grain pile 7 in the granary into the return air port of the dedicated air-conditioning unit 2. Specifically, the return air duct 5 includes a return air box 51, a return air duct 52, a return air switching box 53 and a return air duct switching plate 54.

[0039] The return air box 51 is a box-shaped structure located above the grain pile 7 inside the granary, and is provided with an air vent plate inside, which can effectively increase the air intake volume and improve the air intake efficiency.

[0040] The return air duct 52 passes through the outer wall 1 of the granary horizontally, and its two ends are respectively connected to the return air box 51 and the return air switching box 53 arranged outside the granary.

[0041] The return air switching box 53 is a rectangular box structure, and its end away from the return air duct 52 is connected to the return air outlet of the dedicated air-conditioning unit 2, so that the hot air in the space above the grain pile 7 in the granary can enter the return air outlet of the dedicated air-conditioning unit 2 along the return air box 51, the return air duct 52 and the return air switching box 53.

[0042] The return air switching box 53 can connect the return air outlet of the dedicated air conditioning unit 2 with the return air duct 52 or the external atmospheric environment, which is specifically achieved through the return air duct switching plate 54.

[0043] The return air duct switching plate 54 is a rectangular flat plate structure, which is disposed inside the return air switching box 53 , and one end of the return air duct switching plate 54 is hinged to the bottom surface of the return air switching box 53 .

[0044] The bottom surface of the return air switch box 53 is open, and the bottom surface opening is a communication channel between the return air switch box 53 and the external atmospheric environment. Since the return air switch box 53 is located outside the granary, the communication opening channel arranged at the bottom can prevent rain and snow from entering the return air switch box 53.

[0045] The shape and size of the return air duct switching plate 54 match the bottom surface of the return air switching box 53, so that the return air duct switching plate 54 can be rotated within a certain angle range to open or block the communication channel between the return air switching box 53 and the external atmospheric environment.

[0046] At the same time, one end of the return air duct switching plate 54 hinged to the bottom of the return air switching box 53 is close to the return air duct 52, and the size of the return air duct switching plate 54 is sufficient to completely block the return air duct 52 when the return air duct switching plate 54 is rotated clockwise to a vertical position, thereby cutting off the connecting channel between the interior of the granary and the return air outlet of the dedicated air-conditioning unit 2.

[0047] In this embodiment, when the return air duct switching plate 54 rotates to a vertical position, the return air duct switching plate 54 completely blocks the return air duct 52, and at the same time, the connecting passage between the return air switching box 53 and the external atmospheric environment is completely opened; and when the return air duct switching plate 54 rotates counterclockwise to a horizontal position, the return air duct switching plate 54 completely blocks the connecting passage between the return air switching box 53 and the external atmospheric environment, and at the same time, the connecting passage between the return air switching box 53 and the return air duct 52 is completely opened.

[0048] The air outlet channel 6 can guide the cold air from the air outlet of the dedicated air conditioning unit 2 into the interior of the granary. Specifically, the air outlet channel 6 includes an air outlet channel 61, an air outlet switching box 62 and an air outlet channel switching plate 63.

[0049] The air outlet duct 61 passes horizontally through the outer wall 1 of the granary, and its two ends are respectively connected to the air outlet of the dedicated air conditioning unit 2 and the air outlet switching box 62 arranged inside the granary.

[0050] The air outlet switching box 62 is a rectangular box structure, and its end away from the air outlet duct 61 is connected to the space above the grain pile 7 in the granary, so that the cold air from the air outlet of the dedicated air-conditioning unit 2 can enter the granary along the air outlet duct 61 and the air outlet switching box 62.

[0051] In particular, the vertical height of the entire return air duct 5 is higher than the air outlet switching box 62, thereby utilizing the principle of hot air ascending and cold air descending to improve the cooling effect of the dedicated air conditioning unit 2 on the granary.

[0052] The air outlet switching box 62 can connect the air outlet of the dedicated air conditioning unit 2 with the ventilation cage 4 or the upper space of the grain pile 7 in the granary, which is specifically achieved through the air outlet duct switching plate 63.

[0053] The air outlet duct switching plate 63 is a rectangular flat plate structure, one end of which is hinged to the inside of the air outlet switching box 62 . In this embodiment, the hinge between the air outlet duct switching plate 63 and the air outlet switching box 62 is located on the bottom surface of the air outlet switching box 62 .

[0054] The bottom of the air outlet switch box 62 is connected to the top of the granary vertical pipe 3. The granary vertical pipe 3 is a vertical pipe close to the granary outer wall 1, and the bottom of the granary vertical pipe 3 is connected to the ventilation cage 4, so that the cold air from the air outlet of the dedicated air conditioning unit 2 can enter the ventilation cage 4 through the air outlet switch box 62 and the granary vertical pipe 3, and then enter the grain pile 7 from the bottom of the grain pile 7 through the air holes on the ventilation cage 4.

[0055] The shape and size of the air outlet duct switching plate 63 are adapted to the air outlet switching box 62, so that when the air outlet duct switching plate 63 rotates in the air outlet switching box 62, the air outlet duct switching plate 63 can open or block the connecting passage between the air outlet switching box 62 and the ventilation cage 4.

[0056] At the same time, one end of the air outlet duct switching plate 63 hinged to the bottom surface of the air outlet switching box 62 is away from the air outlet duct 61, and the shape and size of the air outlet duct switching plate 63 are sufficient to completely block the connecting channel between the air outlet switching box 62 and the space above the grain pile 7 in the granary when the air outlet duct switching plate 63 is rotated to the top of the air outlet duct switching plate 63 and contacts the top surface of the air outlet switching box 62.

[0057] In the present embodiment, when the air outlet duct switching plate 63 rotates until the top of the air outlet duct switching plate 63 contacts the top surface of the air outlet switching box 62, the air outlet duct switching plate 63 completely blocks the communication passage between the air outlet switching box 62 and the space above the grain pile 7 in the granary, and at the same time, the communication passage between the air outlet switching box 62 and the vertical pipe 3 of the granary is completely opened; and when the air outlet duct switching plate 63 rotates counterclockwise to a horizontal position, the air outlet duct switching plate 63 completely blocks the vertical pipe 3 of the granary, and at the same time, the communication passage between the air outlet switching box 62 and the space above the grain pile 7 in the granary is completely opened.

[0058] The return air duct switching plate 54 and the outlet air duct switching plate 63 in the utility model are driven by motors. In order to further improve the automation and intelligence of the grain silo intelligent temperature control and ventilation integrated device, the motors driving the return air duct switching plate 54 and the outlet air duct switching plate 63 are controlled by controllers. The utility model uses a commonly used industrial controller in the prior art, such as a PLC (programmable logic controller), and can realize the automatic rotation of the return air duct switching plate 54 and the outlet air duct switching plate 63 without involving improvements to the control logic algorithm.

[0059] At the same time, the device retains direct human control of the return air duct switching plate 54 and the outlet air duct switching plate 63 to facilitate testing, maintenance work and emergency response.

[0060] In order to prevent the hot and humid air in the granary and the corrosion of the equipment during the fumigation period of the granary, the return air box 51, return air duct 52, return air switching box 53, return air duct switching plate 54, outlet duct 61, granary vertical pipe 3, outlet air switching box 62 and outlet duct switching plate 63 that are in direct contact with the air in the granary are all made of stainless steel, and preferably 304 stainless steel.

[0061] In order to prevent the loss of cold energy, the present device adopts an integrated internal insulation method for heat insulation. In some other embodiments, an insulation layer formed by insulation cotton can be set only on the connecting channel between the air outlet of the dedicated air-conditioning unit 2 and the air outlet switching box 62.

[0062] This embodiment takes the summer grain pile cooling working mode as an example, and its working principle is as follows:

[0063] In summer, the temperature of the outside atmosphere is high, and the temperature inside the granary is high, so the hot air inside the granary gathers in the space above the grain pile 7. In the summer grain pile cooling working mode, the booster fan and the compressor in the special air-conditioning unit 2 are both working, and the controller controls the motor to drive the return air duct switching plate 54 to rotate to a horizontal position and the outlet air duct switching plate 63 to rotate to the top of the outlet air duct switching plate 63 to contact the top surface of the outlet air switching box 62. At this time, the return air duct switching plate 54 completely blocks the communication channel between the return air switching box 53 and the outside atmosphere, and the outlet air duct switching plate 63 completely blocks the communication channel between the outlet air switching box 62 and the space above the grain pile 7 in the granary. At the same time, the communication channel between the outlet air switching box 62 and the granary vertical pipe 3 is completely opened, and the communication channel between the return air switching box 53 and the return air duct 52 is completely opened. The dedicated air-conditioning unit 2 absorbs hot air from the space above the grain pile 7 through the return air switching box 53, the return air duct 52 and the return air box 51. After cooling, the cold air is blown into the grain pile 7 through the outlet duct 61, the outlet switching box 62, the granary vertical pipe 3 and the ventilation cage 4. After the grain in the grain pile 7 is cooled, the cold air is converted into hot air and passes through the grain pile 7 and returns to the space above the grain pile 7. This process is repeated in a reciprocating cycle to achieve cooling of the grain pile in summer.

[0064] Embodiment 2

[0065] As attached Figure 3-4 As shown, a granary intelligent temperature control and ventilation integrated device disclosed by the utility model is shown. Different from the first embodiment, this embodiment shows the summer grain surface temperature control working mode of the device, and its working principle is as follows:

[0066] In the summer grain surface temperature control working mode, the booster fan and the compressor in the dedicated air conditioning unit 2 are both working, and the controller controls the motor to drive the return air duct switching plate 54 to rotate to a horizontal position and the outlet air duct switching plate 63 to rotate to a horizontal position. At this time, the return air duct switching plate 54 completely blocks the communication channel between the return air switching box 53 and the external atmospheric environment, and the outlet air duct switching plate 63 completely blocks the communication channel between the outlet air switching box 62 and the vertical pipe 3 of the granary. At the same time, the communication channel between the outlet air switching box 62 and the space above the grain pile 7 in the granary is completely opened, and the communication channel between the return air switching box 53 and the return air duct 52 is completely opened. The dedicated air-conditioning unit 2 absorbs hot air from the space above the grain pile 7 through the return air switching box 53, the return air duct 52 and the return air box 51. After cooling, the cold air is blown into the surface of the grain pile 7 through the outlet duct 61 and the outlet switching box 62. After the surface of the grain pile 7 is cooled, the cold air becomes hot air and goes up, and is sucked into the return air box 51 again. This reciprocating cycle is used to achieve temperature control of the grain surface in summer.

[0067] Embodiment 3

[0068] As attached Figure 5-6As shown, a granary intelligent temperature control and ventilation integrated device disclosed by the utility model is shown. Different from the first embodiment, this embodiment shows the winter mechanical ventilation working mode of the device, and its working principle is as follows:

[0069] In winter, the temperature of the outside atmosphere is low, and the temperature inside the granary is relatively low. In the winter mechanical ventilation working mode, the booster fan in the dedicated air conditioning unit 2 works but the compressor does not work. The controller controls the motor to drive the return air duct switching plate 54 to rotate to a vertical position and the outlet air duct switching plate 63 to rotate until the top of the outlet air duct switching plate 63 contacts the top surface of the outlet air switching box 62. At this time, the return air duct switching plate 54 completely blocks the communication channel between the return air switching box 53 and the return air duct 52, and the outlet air duct switching plate 63 completely blocks the communication channel between the outlet air switching box 62 and the space above the grain pile 7 in the granary. At the same time, the communication channel between the outlet air switching box 62 and the vertical pipe 3 of the granary is completely opened, and the communication channel between the return air switching box 53 and the outside atmosphere is completely opened. The dedicated air-conditioning unit 2 absorbs cold air from the external atmospheric environment through the return air switching box 53, and blows the cold air into the grain pile 7 through the air outlet duct 61, the air outlet switching box 62, the granary vertical pipe 3 and the ventilation cage 4. After the cold air in the ventilation cage 4 completes the ventilation of the grain in the grain pile 7, it is discharged from the granary through the ventilating port on the top of the granary. This process is repeated in a reciprocating cycle to achieve mechanical ventilation in winter.

[0070] Although preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they are aware of the basic creative concepts. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention. Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A granary intelligent temperature control and ventilation integrated device, used in a granary storing a grain pile (7), the granary is provided with a return air duct (52), the return air duct (52) is connected to the space above the grain pile (7) in the granary, and a ventilation cage (4) is provided at the bottom of the granary, characterized in that: A dedicated air conditioning unit (2) and a return air switching box (53) are arranged outside the granary, and an air outlet switching box (62) is arranged inside the granary. The return air switching box (53) connects the return air outlet of the dedicated air conditioning unit (2) with the return air duct (52) or the external atmospheric environment. The air outlet of the dedicated air conditioning unit (2) is connected with the air outlet switching box (62). The air outlet switching box (62) is connected with the ventilation cage (4) or the space above the grain pile (7) in the granary. The height of the return air duct (52) is higher than the air outlet switching box (62).

2. The intelligent temperature control and ventilation integrated device for granary according to claim 1 is characterized in that: The return air switching box (53) is provided with a return air duct switching plate (54), one end of which is hinged on the return air switching box (53), and the return air duct switching plate (54) is rotated to open or block the communication channel between the return air switching box (53) and the external atmospheric environment, and the return air duct switching plate (54) can simultaneously open or block the communication channel between the return air switching box (53) and the return air duct (52).

3. The intelligent temperature control and ventilation integrated device for granary according to claim 2 is characterized in that: The communication passage between the return air switching box (53) and the external atmospheric environment is located at the bottom of the return air switching box (53).

4. The intelligent temperature control and ventilation integrated device for granary according to claim 2 is characterized in that: The return air duct switching plate (54) is driven by a motor or directly controlled by manpower.

5. The intelligent temperature control and ventilation integrated device for granary according to claim 1 is characterized in that: The air outlet switching box (62) is provided with an air outlet duct switching plate (63), one end of which is hinged to the air outlet switching box (62). The air outlet duct switching plate (63) is rotated to open or block the communication passage between the air outlet switching box (62) and the space above the grain pile (7) in the granary, and the air outlet duct switching plate (63) can simultaneously open or block the communication passage between the air outlet switching box (62) and the ventilation cage (4).

6. The intelligent temperature control and ventilation integrated device for granary according to claim 5 is characterized in that: The air outlet duct switching plate (63) is driven by a motor or directly controlled by manpower.

7. The intelligent temperature control and ventilation integrated device for granary according to any one of claims 1 to 6, characterized in that: The return air switching box (53) and the outlet air switching box (62) are both made of stainless steel.

8. The intelligent temperature control and ventilation integrated device for granary according to any one of claims 1 to 6, characterized in that: A heat-insulating layer is provided on the communication passage between the air outlet of the dedicated air-conditioning unit (2) and the air outlet switching box (62).

9. The intelligent temperature control and ventilation integrated device for granary according to claim 4 is characterized in that: The controller controls the motor to drive the return air duct switching plate (54) to operate.

10. The intelligent temperature control and ventilation integrated device for granary according to claim 6, characterized in that: The controller controls the motor to drive the air outlet duct switching plate (63) to operate.

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