Aeration control box for silo storage
By using clamps and spring clamps to fix aviation plugs of different diameters in the ventilation control box, and combining the design of heat dissipation slots and heat conduction plates, the problems of unstable connection and poor heat dissipation of the ventilation controller are solved, thereby improving the safety and lifespan of the controller.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 广州港股份有限公司
- Filing Date
- 2025-05-21
- Publication Date
- 2026-06-12
AI Technical Summary
The existing ventilation controller's through-hole cannot secure aviation plugs of different diameters, resulting in unstable connections, poor contact and short circuits, poor heat dissipation, and reduced service life.
Design a ventilation control box for grain storage in silos. It adopts a temperature and humidity sensor and a hollow structure shell. The side wall of the shell has multiple through holes, and symmetrical clamping parts and spring clamping blocks are installed in the through holes. It can clamp aviation plugs of different diameters and improve heat dissipation through heat dissipation grooves and heat conduction plates.
It achieves stable connection to aviation plugs of different diameters, avoiding poor contact and short circuits, improving the safety and lifespan of the control box, and effectively dissipating heat to ensure the normal operation of the controller.
Smart Images
Figure CN224356393U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of grain storage equipment technology, specifically to a ventilation control box for grain storage in silos. Background Technology
[0002] As grain storage equipment, the internal environmental parameters of grain silos, such as temperature, humidity, and moisture, are closely related to problems like mold growth, sprouting, and pests, and have a decisive impact on grain quality. During the grain storage process, strict requirements are placed on the temperature, humidity, and moisture parameters inside the silo and on the grain itself. Therefore, ventilation is necessary to regulate the internal environment of the grain silos in a timely manner.
[0003] Traditional ventilation methods often rely on manual observation, which presents several problems: 1. Manual observation depends on manual operation, requiring regular inspections, resulting in low efficiency and a high risk of errors; 2. Manual observation cannot provide real-time monitoring, making it difficult to detect localized temperature and humidity anomalies in stored grain, leading to mold, pests, and other problems within the silos; 3. Existing ventilation methods rely on manual judgment regarding ventilation time and duration, easily resulting in over- or under-ventilation. Therefore, a controller based on environmental parameters has been developed to precisely and intelligently control the ventilation of grain silos. However, existing controllers have complex internal circuits involving numerous wires. To avoid a tangled distribution of wires, circular aviation connectors are typically used in the controller design to connect multiple wires together and then to external devices. In actual use, the controller connects to multiple external devices, necessitating the use of multiple aviation connectors of different diameters to match the wires of these devices. The through-hole dimensions on existing controllers are generally fixed, making it easy for aerospace plugs of different diameters to wobble within the hole when passing through and connecting to external devices. This can lead to short circuits in the controller's internal wiring due to pulling on the aerospace plug when connecting to other devices. Furthermore, because the through-hole dimensions are fixed in existing controllers, they cannot clamp aerospace plugs of different thicknesses securely, causing the plugs to wobble under external forces during use, potentially leading to poor contact with other components. All of these issues affect the normal operation of the controller. In addition, existing controllers have poor heat dissipation, easily leading to high internal temperatures and circuit damage, thus reducing the controller's lifespan. Utility Model Content
[0004] To address the technical problem that the through-hole of the existing controller cannot secure aviation plugs of different diameters inside the controller, which leads to poor contact between the controller and external devices, this utility model provides a ventilation control box for grain storage in silos.
[0005] This utility model is achieved using the following technical solution: a ventilation control box for grain storage in silos, comprising a temperature and humidity sensor and a hollow housing. The temperature and humidity sensor is installed on the outer wall of the housing and is used to detect the temperature and humidity in the grain silo. The side wall of the housing has multiple through holes for passing through aviation connectors, symmetrically arranged on both sides of the temperature and humidity sensor. A pair of clamping members are symmetrically arranged radially within each through hole. The side wall of the housing has a mounting groove communicating with the through hole, the width of which is greater than or equal to the diameter of the through hole. The clamping member includes a clamping block and at least one spring, the spring being fixedly installed in the mounting groove and always kept compressed. The clamping block is slidably installed in the mounting groove, with one end of the clamping block fixedly connected to the spring, and the other end of the clamping block extending into the through hole. The end of the clamping block extending into the through hole has an arc-shaped groove, the radius of which is smaller than the radius of the through hole. Two clamping blocks located in the same through hole can clamp aviation connectors of different diameters passing through the through hole.
[0006] As a further improvement of this utility model, a flexible anti-slip layer is pasted on the inner side of the arc-shaped groove.
[0007] As a further improvement of this utility model, the clamping block is also provided with a pair of limiting rods, which are symmetrically arranged on both sides of the clamping block. The side wall of the housing with the mounting groove is also provided with a pair of sliding grooves, which are respectively connected to the mounting groove. The sliding grooves are arranged along the length direction of the mounting groove, and each limiting rod is slidably installed in each sliding groove.
[0008] Furthermore, the shell is a cuboid structure, and the bottom of the shell is provided with multiple heat dissipation grooves 1 and 2 distributed in a mesh pattern. The two ends of each heat dissipation groove 1 penetrate through the side wall of the shell, and each heat dissipation groove 2 is connected to each heat dissipation groove 1.
[0009] Furthermore, multiple heat dissipation slots are arranged sequentially from the middle outwards along the length of the casing, with the distance between the outermost heat dissipation slot and the middle heat dissipation slot being less than the distance between the outermost heat dissipation slot and the sidewall along the length of the casing. Multiple heat dissipation slots are arranged sequentially from the middle outwards along the width of the casing, with the distance between the outermost heat dissipation slot and the middle heat dissipation slot being equal to the distance between the outermost heat dissipation slot and the sidewall of the casing.
[0010] In this utility model, a heat-conducting plate is also installed at the bottom of the shell. An arc-shaped curved surface is provided on the side of the heat-conducting plate facing the bottom of the shell. The arc-shaped curved surface is integrally formed by recessing from the periphery of the bottom surface of the heat-conducting plate towards the center.
[0011] In this invention, the upper surface of the housing is also provided with multiple heat dissipation fins.
[0012] Furthermore, a dust cover is detachably mounted on the outer surface of the temperature and humidity sensor.
[0013] As a further improvement of this utility model, the housing also includes an upper housing and a lower housing. Both the upper housing and the lower housing are hollow structures. The lower housing is provided with a slot, and the upper housing is provided with a plug at a position opposite to the slot. The plug is detachably installed in the slot.
[0014] As a further improvement of this utility model, both the upper and lower shells are provided with multiple semi-circular grooves, and two semi-circular grooves located at the same position on the upper and lower shells can form a through hole.
[0015] The technical solution provided by this utility model has the following beneficial effects:
[0016] (1) This utility model solves the technical problem in the prior art that aviation plugs cannot be fixed when passing through a through hole by setting a pair of limiting members, the spring on each pair of limiting members will generate an elastic force on the limiting block, so that the two limiting blocks can clamp aviation plugs of different diameters passing through the through hole. At the same time, since this solution can clamp the aviation plug, the control box of this solution can also improve the stability of the connection between the two when connected to other external devices through the aviation plug, avoid the phenomenon of short circuit or open circuit, and improve the safety of the control box during use.
[0017] (2) By setting up heat dissipation slot 1, heat dissipation slot 2 and heat conduction plate, the heat generated on the circuit board can be quickly diffused into heat dissipation slot 1 and heat dissipation slot 2 through heat conduction plate. The diffused heat can be diffused outward through heat dissipation slot 1 in a timely manner, thereby achieving the purpose of effectively dissipating heat inside the shell. Attached Figure Description
[0018] Figure 1 A three-dimensional schematic diagram of the ventilation control box for grain storage in silos provided by this utility model.
[0019] Figure 2 A schematic diagram of the upper and lower housings of the ventilation control box provided by this utility model when separated.
[0020] Figure 3 A top view of the ventilation control box for grain storage in silos provided by this utility model.
[0021] Figure 4 This utility model Figure 3 Sectional view along the middle AA.
[0022] Figure 5 This utility model provides a structural diagram of a pair of clamping members when clamping an aviation plug with a large diameter.
[0023] Figure 6 This utility model is Figure 5 Enlarged diagram of point B in the middle.
[0024] Figure 7 This is a cross-sectional schematic diagram of the heat-conducting plate in this utility model.
[0025] Figure 8 This is a schematic diagram of the circuit board structure in this utility model.
[0026] The markings in the diagram are as follows: 11. Dust cover; 2. Housing; 21. Through hole; 22. Mounting slot; 23. Clamping block; 231. Anti-slip layer; 232. Limiting rod; 24. Spring; 25. Heat dissipation slot one; 26. Heat dissipation slot two; 27. Heat conduction plate; 271. Curved surface; 28. Heat dissipation fin; 29. Upper housing; 291. Insertion block; 30. Lower housing; 301. Slot; 31. Slide. Detailed Implementation
[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.
[0028] This embodiment provides a ventilation control box for grain storage in silos, which is typically installed on the grain silo. Please refer to... Figure 1The ventilation control box includes a temperature and humidity sensor and a hollow housing 2. The temperature and humidity sensor is installed on the outer wall of the housing 2 and is used to detect the temperature and humidity in the grain silo. In this embodiment, the control box is generally installed at the ventilation opening of the grain silo, which allows the temperature and humidity sensor to collect temperature and humidity data more accurately. Multiple through holes 21 are provided on the side wall of the housing 2, symmetrically distributed on both sides of the temperature and humidity sensor. A circuit board is located inside the housing 2, with multiple wires connected via circular aviation connectors. These connectors then pass through the through holes 21 to connect to other external devices. For example, the connectors can be used to connect to a motor that ventilates the grain silo, or to a ventilation device (such as a power supply). When using aviation connectors to connect the circuit board to external devices, different diameter connectors are used. However, the through holes 21 in existing control boxes are of a fixed size, making it impossible to clamp aviation connectors of different diameters. In this design, a pair of clamping members are symmetrically arranged radially within each through-hole 21. These clamping members can clamp aviation connectors of different diameters passing through the through-holes 21. Furthermore, because this design can clamp the aviation connectors, it improves the stability of the connection between the control box and other external devices via the aviation connectors, preventing short circuits or open circuits and enhancing the safety of the control box during use. Please refer to [reference needed]. Figures 2 to 4The specific design is as follows: A mounting groove 22 communicating with a through hole 21 is provided on the side wall of the housing 2. The width of the mounting groove 22 is greater than or equal to the diameter of the through hole 21. The clamping component includes a clamping block 23 and at least one spring 24. The spring 24 is fixedly installed in the mounting groove 22 along its vertical direction and remains compressed within the mounting groove 22. The clamping block 23 can be a rectangular structure. The clamping block 23 is slidably installed in the mounting groove 22, with one end of the clamping block 23 fixedly connected to the spring 24, and the other end of the clamping block 23 extending into the through hole 21. An arc-shaped groove is provided at the end of the clamping block 23 extending into the through hole 21, the radius of which is smaller than the radius of the through hole 21. The purpose of this design is that when aviation plugs of different diameters pass through the through hole 21 to connect with external devices, the arc-shaped groove of the clamping block 23 can always exert pressure on aviation plugs of different diameters under the elastic force of the spring 24. In the actual selection of spring 24, it is necessary to select a spring 24 that can always maintain compression within the mounting slot 22. This limitation aims to ensure that spring 24 consistently exerts a spring force on clamping block 23, allowing clamping block 23 to consistently clamp the aviation connector passing through through hole 21. Furthermore, the two clamping blocks 23 on the pair of clamping members can clamp the aviation connector from both top and bottom, thereby improving the clamping effect. In this embodiment, the number of springs 24 can be multiple, and these springs 24 can be evenly distributed on clamping block 23. The purpose of this even distribution is to ensure that the force on each area of clamping block 23 is as uniform as possible, thereby increasing the stability of clamping by clamping block 23.
[0029] The temperature and humidity sensor can be installed on the housing 2 by means of threaded fastening, and a dust cover 11 is detachably installed on the outer surface of the temperature and humidity sensor. The dust cover 11 effectively protects the temperature and humidity sensor, preventing dust from affecting the measured data. The temperature and humidity sensor can use a Sensirion (Switzerland) digital temperature and humidity sensor probe. This sensor probe can include two probes, one for measuring the temperature and humidity inside the grain silo and the other for measuring the temperature and humidity outside the grain silo.
[0030] Please refer to Figure 6A flexible anti-slip layer 231 is adhered to the inner side of the arc-shaped groove. The flexible anti-slip layer 231 can be made of rubber, with a thickness of 2mm-3mm. This design increases the friction between the clamping block 23 and the aviation plug, and combined with the elasticity of the spring 24, ensures that the anti-slip layer 231 adheres tightly to the surface of the aviation plug, thereby improving the clamping effect of the clamping block 23. Simultaneously, the anti-slip layer 231 can deform to accommodate aviation plugs of different diameters, increasing the contact area between the clamping block 23 and the aviation plug, thus enhancing the clamping effect. This design enables the clamping block 23 in this solution to effectively clamp aviation plugs of different diameters.
[0031] The width of the clamping block 23 can be slightly smaller than the width of the mounting groove 22, and the length of the clamping block 23 is less than the length of the mounting groove 22. This design allows the mounting groove 22 itself to limit the movement of the clamping block 23, thereby improving the stability of the clamping block 23 sliding within the mounting groove 22 under the elastic force of the spring 24. Furthermore, to further increase the stability of the clamping block 23 sliding within the mounting groove 22, the applicant has made the following improvements to the clamping block 23: Please refer to... Figures 4 to 6 The clamping block 23 is also provided with a pair of limiting rods 232, which are symmetrically arranged on both sides of the clamping block 23. The side wall of the housing 2, which has a mounting groove 22, is also provided with a pair of sliding grooves 31, which are respectively connected to the mounting groove 22, and are symmetrically arranged on the left and right sides of the mounting groove 22. The sliding grooves 31 are arranged along the length of the mounting groove 22. Each limiting rod 232 is installed in the sliding groove 31. By setting the limiting rods 232 and the sliding grooves 31, the sliding of the clamping block 23 within the mounting groove 22 can be further limited, improving the stability of the clamping block 23 during the sliding process. Understandably, in this embodiment, by setting a spring 24 and a clamping block 23 that can slide within the mounting groove 22, when the diameter of the aviation plug passing through the through hole 21 is large, the clamping block 23 will move towards the spring 24. Simultaneously, the elastic force generated by the spring 24 will firmly press the anti-slip layer 231 on the clamping block 23 against the surface of the aviation plug, thereby achieving the purpose of clamping the aviation plug using the clamping block 23. Conversely, when the diameter of the aviation plug passing through the through hole 21 is small, the clamping block 23 can also exert a compressive force on the aviation plug under the elastic force of the spring 24. With the combined action of the two clamping blocks 23, the purpose of clamping the aviation plug can be effectively achieved.
[0032] The housing 2 can be a rectangular parallelepiped structure. The housing 2 can be a single-piece design, or it can be composed of multiple parts connected by adhesive or threaded connections. Please refer to... Figure 7 and Figure 8Inside the housing 2, a heat-conducting plate 27 and a circuit board are also installed at the bottom. The heat-conducting plate 27 has an arc-shaped curved surface 271 on one side facing the bottom of the housing 2. The arc-shaped curved surface 271 is integrally formed by recessing from the periphery of the bottom surface of the heat-conducting plate 27 towards the center. The side of the heat-conducting plate 27 opposite to the arc-shaped curved surface 271 is a flat surface, and the circuit board can be mounted on this flat surface of the heat-conducting plate 27 by adhesive bonding. Please refer to... Figure 2 The bottom of the housing 2 is provided with multiple heat dissipation slots 25 and 26, which are arranged in a mesh pattern. Each heat dissipation slot 25 penetrates the side wall of the housing 2 at both ends, and each heat dissipation slot 26 is connected to each heat dissipation slot 25. This arrangement allows heat inside the housing 2 to be dissipated through the heat dissipation slots 26 and 25, thereby achieving the purpose of heat dissipation inside the housing 2.
[0033] Multiple heat dissipation slots 25 can be arranged sequentially along the length of the housing 2, and the multiple heat dissipation slots 25 are arranged symmetrically from the center outwards along the length of the housing 2. The distance between the outermost heat dissipation slot 25 and the middle heat dissipation slot 25 is less than the distance between the outermost heat dissipation slot 25 and the side wall along the length of the housing 2. Multiple heat dissipation slots 26 can be arranged sequentially along the width of the housing 2, and the multiple heat dissipation slots are arranged symmetrically from the center outwards along the length of the housing 2. The distance between the outermost heat dissipation slot 26 and the middle heat dissipation slot 26 is equal to the distance between the outermost heat dissipation slot 26 and the side wall of the housing 2. This arrangement provides ample space around the bottom of the housing 2, which facilitates the installation of the heat-conducting plate 27. The side of the heat-conducting plate 27 facing the heat dissipation groove 25 is an arc-shaped curved surface 271. This not only increases the heat dissipation area of the heat-conducting plate 27, but also increases the heat dissipation space of hot air. At the same time, by passing the heat dissipation groove 25 through the side wall of the housing 2, the heat dissipated through the heat-conducting plate 27 can be discharged through the heat dissipation groove 25, thereby improving the heat dissipation effect inside the housing 2.
[0034] In addition, the upper outer surface of the housing 2 is provided with multiple heat dissipation fins 28, which can increase the surface area of the housing 2, making it easier for heat inside the housing 2 to dissipate. The lower outer surface of the housing 2 is also provided with mounting holes around its perimeter, through which the control box can be fixedly mounted.
[0035] The heat-conducting plate 27 can be made of copper. During operation, the control box connects to an external fan and detects parameters such as temperature, humidity, and gas concentration inside the grain silo, as well as the temperature and humidity outside the grain silo. The control motor is activated to ventilate the grain silo by comparing the temperature and humidity inside and outside the silo. The conditions for cooling and ventilating the grain silo are as follows: when the average temperature inside the grain silo is 8°C higher than the temperature outside (6°C in subtropical regions), the motor controlling ventilation will start. Furthermore, when the humidity inside the grain silo is higher than the customer's required safe humidity, the relative humidity during ventilation must be lower than the equilibrium relative humidity inside the grain silo. The conditions for dehumidifying and ventilating the grain silo are as follows: when the average temperature inside the grain silo is higher than the atmospheric dew point temperature outside the grain silo, and the equilibrium absolute humidity inside the grain silo is higher than the atmospheric absolute humidity outside the grain silo, the motor controlling ventilation will start. The above operations enable real-time monitoring of the internal environment of the grain silo and timely ventilation based on the monitored data. When the fan ventilates the grain silo, it drives the airflow around the control box. Due to the presence of heat dissipation slots 25, the high-speed airflow generated by the fan further accelerates the dissipation of heat generated inside the control box, thereby achieving rapid cooling of the control box.
[0036] The circuit board consists of a motor driver chip, a power supply circuit, and a drive circuit. The circuit board structure can be found in [reference needed]. Figure 8 As shown, U2 is the motor driver chip, U3 and U4 are power supply circuits, and Q1, Q2, Q3, Q4, Q5, Q6, Q7, and Q8 are all drive circuits. In this embodiment, by integrating the motor driver chip, drive circuit, and sensor into the control box, the structure of the entire control box can be effectively simplified. The electrode driver chip is a microprocessor manufactured by STMicroelectronics. The power supply circuit consists of an isolated power module and an LDO power chip. The isolated power module is a 12V input to 5V output power module manufactured by Mornsun, which provides 5V power input to the circuit board while achieving power isolation; then, it is converted to 3V3 by an MSKSEMI LDO power chip to power the motor driver chip. The motor driver chip and drive circuit are directly controlled through I / O ports, and the motor driver chip and sensor probe are connected through an I2C port.
[0037] The drive circuit is an H-bridge motor drive circuit, which can be formed into an "H" shape by four transistors. One end of the drive circuit is directly connected to the motor drive chip through the IO port, and the other end of the drive circuit is connected to the motor that ventilates the grain silo through a connector.
[0038] Meanwhile, since the temperature and humidity sensor is integrated into the housing 2 in this solution, the physical distance between the temperature and humidity sensor and the circuit board can be effectively reduced, and the feedback time from environmental data to device control can be reduced, thereby improving control efficiency.
[0039] When the housing 2 is a split structure, it may include an upper housing 29 and a lower housing 30, both of which are hollow structures. The upper housing 29 is provided with a plug 291, and the lower housing 30 is provided with a slot 301. The upper housing 29 and the lower housing 30 can be initially fixed by the plug 291 and the slot 301. Then, the upper housing 29 and the lower housing 30 can be fixed by fixing the plug 291 into the slot 301 with multiple bolts.
[0040] Both the upper housing 29 and the lower housing 30 are provided with multiple semi-circular grooves. Two semi-circular grooves located at the same position on the upper housing 29 and the lower housing 30 can form a through hole 21. That is, when the upper housing 29 and the lower housing 30 are assembled, the two semi-circular grooves can be assembled to form a through hole 21.
[0041] It is understandable that the upper housing 29 may also include separable upper housing one and upper housing two, with the dividing point between upper housing one and upper housing two being the upper end face of the slide groove 31. By setting upper housing one and upper housing two, the spring 24 and the limiting block can be quickly installed in the mounting groove 22. Similarly, the lower housing 30 can also be divided into two parts, the purpose of which is also to assemble the spring 24 and the limiting block into the mounting groove 22.
[0042] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A ventilation control box for grain storage in silos, characterized in that, It includes a temperature and humidity sensor and a hollow housing (2). The temperature and humidity sensor is installed on the outer wall of the housing (2) and is used to detect the temperature and humidity in the grain silo. The side wall of the housing (2) is provided with a plurality of through holes (21) for passing through an aviation plug. The plurality of through holes (21) are symmetrically distributed on both sides of the temperature and humidity sensor. Each through hole (21) is provided with a pair of clamping members symmetrically arranged in the radial direction. The side wall of the housing (2) is provided with a mounting groove (22) communicating with the through hole (21). The width of the mounting groove (22) is greater than or equal to the diameter of the through hole (21). The clamping members include clamping blocks (23) for... The device includes at least one spring (24), which is fixedly installed in the mounting groove (22) and always kept compressed; the clamping block (23) is slidably installed in the mounting groove (22) and one end of the clamping block (23) is fixedly connected to the spring (24), and the other end of the clamping block (23) extends into the through hole (21); the end of the clamping block (23) extending into the through hole (21) is provided with an arc-shaped groove, the radius of which is smaller than the radius of the through hole (21); the two clamping blocks (23) located in the same through hole (21) can clamp aviation plugs with different diameters passing through the through hole (21).
2. The ventilation control box for grain storage in silos as described in claim 1, characterized in that, A flexible anti-slip layer (231) is attached to the inner side of the arc-shaped groove.
3. The ventilation control box for grain storage in silos as described in claim 1, characterized in that, The clamping block (23) is also provided with a pair of limiting rods (232), which are symmetrically arranged on both sides of the clamping block (23). The side wall of the housing (2) with the mounting groove (22) is also provided with a pair of sliding grooves (31), which are respectively connected to the mounting groove (22). The sliding grooves (31) are arranged along the length direction of the mounting groove (22), and each of the limiting rods (232) is slidably installed in each of the sliding grooves (31).
4. The ventilation control box for grain storage in silos as described in claim 1, characterized in that, The shell (2) is a rectangular shell (2). The bottom of the shell (2) is provided with a plurality of heat dissipation grooves 1 (25) and heat dissipation grooves 2 (26) distributed in a mesh pattern. The two ends of each heat dissipation groove 1 (25) penetrate the side wall of the shell (2) respectively, and each heat dissipation groove 2 (26) is connected to each heat dissipation groove 1 (25).
5. The ventilation control box for grain storage in silos as described in claim 4, characterized in that, The plurality of heat dissipation slots (25) are arranged sequentially from the middle outward along the length of the housing (2). The distance between the outermost heat dissipation slot (25) and the middle heat dissipation slot (25) is less than the distance between the outermost heat dissipation slot (25) and the side wall provided along the length of the housing (2). The multiple heat dissipation slots (26) are arranged sequentially from the middle outward in the width direction of the housing (2), and the distance between the outermost heat dissipation slot (26) and the middle heat dissipation slot (26) is equal to the distance between the outermost heat dissipation slot (26) and the side wall of the housing (2).
6. The ventilation control box for grain storage in silos as described in claim 4, characterized in that, A heat-conducting plate (27) is also installed at the bottom inside the housing (2). An arc-shaped curved surface (271) is provided on the side of the heat-conducting plate (27) facing the bottom of the housing (2). The arc-shaped curved surface (271) is integrally formed by recessing from the periphery of the bottom surface of the heat-conducting plate (27) towards the center.
7. The ventilation control box for grain storage in silos as described in claim 1, characterized in that, The upper surface of the housing (2) is also provided with a plurality of heat dissipation fins (28).
8. The ventilation control box for grain storage in silos as described in claim 1, characterized in that, A dust cover (11) is detachably mounted on the outer surface of the temperature and humidity sensor.
9. The ventilation control box for grain storage in silos as described in claim 1, characterized in that, The housing (2) further includes an upper housing (29) and a lower housing (30). Both the upper housing (29) and the lower housing (30) are hollow structures. The lower housing (30) is provided with a slot (301). The upper housing (29) is provided with a plug (291) at a position opposite to the slot (301). The plug (291) is detachably installed in the slot (301).
10. The ventilation control box for grain storage in silos as described in claim 9, characterized in that, Both the upper housing (29) and the lower housing (30) are provided with a plurality of semi-circular grooves, and two of the semi-circular grooves located at the same position on the upper housing (29) and the lower housing (30) can form the through hole (21).