A moisture-proof control cabinet

Abstract

The present invention belongs to the field of control cabinets, and in particular, relates to a moisture-proof control cabinet. The technology includes a cabinet body, wherein a first horizontal partition, a second horizontal partition, a first vertical partition, and a second vertical partition are provided in the cabinet body; a slide groove and two air flow grooves are provided on the first horizontal partition and the second horizontal partition, and a sliding baffle is provided in the slide groove; a first outer box body and a second outer box body are respectively installed on the left and right sides of the cabinet body; a third vertical partition is provided inside the first outer box body and the second outer box body; two first air flow channels and two second air flow channels are provided on the cabinet body, and an axial flow fan is installed at the first air flow channel; a desiccant filter layer is provided in each of the two outer boxes, and a third air flow channel is provided at the bottom of the outer box body below the desiccant filter layer. The air can be dried and dehumidified before entering the cabinet body, and the two desiccant filter layers can alternately dry and dehumidify and dehydrate by heat, which can ensure the moisture-proof performance of the control cabinet and enable the control cabinet to operate for a long time.

Description

Technical Field

[0001] The invention belongs to the field of control cabinets, and in particular relates to a moisture-proof control cabinet. Background Art

[0002] A control cabinet is a device that monitors data and performs electrical control on external devices. It typically consists of a cabinet body and internally installed switchgear, measuring instruments, protective devices, and auxiliary equipment, all designed to meet electrical wiring requirements. Depending on the type of external device, control cabinets can be categorized into various types, including water pump control cabinets, power supply control cabinets, elevator control cabinets, fire control cabinets, and brick machine control cabinets. Depending on the type of electronic components installed within the cabinet and the requirements of the operating environment, control cabinets can be further divided into heat dissipation control cabinets, explosion-proof control cabinets, and moisture-proof control cabinets.

[0003] Among them, for water conservancy and hydropower engineering equipment, such as pumping stations and sluice gates, their operation requires electrical control through control cabinets. However, the control cabinets of water conservancy and hydropower engineering equipment generally work in relatively humid environments. Special attention should be paid to the moisture-proof performance of the control cabinet. If the moisture-proof performance of the control cabinet is poor, in a humid working environment, the electronic components inside the cabinet are easily damaged by moisture, and even a short circuit may occur, causing a safety accident.

[0004] Existing moisture-proof control cabinets commonly use methods to prevent moisture by installing a heating system inside the cabinet to keep the cabinet dry; or installing a heating system and a condensing system inside the cabinet to heat the air before it enters the cabinet and then condense it for dehumidification, reducing the humidity of the air; or installing a desiccant inside the cabinet to absorb moisture from the air inside the cabinet. While installing a heating system inside the cabinet can dry the air, it also causes the cabinet to heat up internally, affecting the heat dissipation of electronic components; installing a heating system and a condensing system inside the cabinet is relatively expensive; installing a desiccant inside the cabinet, while effective and cost-effective, allows air outside the cabinet to enter directly, requiring the desiccant to absorb moisture over time, and electronic components inside the cabinet will still become damp during this process; if the desiccant is placed at the cabinet's air inlet, although the air can be dried before entering the cabinet, the desiccant gradually becomes saturated with water, reducing its dehumidification function during this process. Replacing the desiccant can affect the normal operation of the control cabinet, and the timing of desiccant replacement is difficult to control. Summary of the Invention

[0005] In view of the above deficiencies in the prior art, the technical problem to be solved by the present invention is: to provide a moisture-proof control cabinet, in which a desiccant is used to dehumidify the air before the air enters the cabinet body, and two air flow channels, each containing a desiccant, are provided for alternating dehumidification. When one desiccant absorbs water and dehumidifies, the other desiccant is dehydrated and restored to activity, without the need to replace the desiccant. This ensures not only the drying effect of the desiccant but also the continuous operation of the control cabinet.

[0006] The moisture-proof control cabinet includes a cabinet body, wherein a first horizontal partition is installed at the bottom of the cabinet body, a first vertical partition is installed at the bottom of the first horizontal partition, the first vertical partition divides the space below the first horizontal partition into a first chamber and a second chamber; a second horizontal partition is installed at the top of the cabinet body, a second vertical partition is installed on the top of the second horizontal partition, and the second vertical partition divides the space above the second horizontal partition into a third chamber and a fourth chamber; the top end of the first horizontal partition and the bottom end of the second horizontal partition are both provided with a slide groove, and the bottom end of the first horizontal partition and the top end of the second horizontal partition are both provided with two air flow grooves; the two air flow grooves on the first horizontal partition are symmetrical along the first vertical partition, and each air flow groove is connected to the slide groove on the first horizontal partition; the two air flow grooves on the second horizontal partition are symmetrical along the second vertical partition, and each air flow groove is connected to the slide groove on the second horizontal partition; a sliding baffle is slidably arranged in each slide groove, and the sliding baffle can block one of the air flow grooves connected to the slide groove;

[0007] A first outer box is installed on the left side of the cabinet, and a second outer box is installed on the right side thereof, and the first outer box and the second outer box are symmetrically arranged on the left and right sides of the cabinet; a third vertical partition is installed inside the first outer box and the second outer box, and the interior of the first outer box is divided into a fifth chamber and a sixth chamber by the third vertical partition, and the interior of the second outer box is divided into a seventh chamber and an eighth chamber by the third vertical partition, and the top of the fifth chamber is connected to the top of the sixth chamber, and the top of the seventh chamber is connected to the top of the eighth chamber; a first air flow channel is opened on the top of the left side wall and the top of the right side wall of the cabinet, one end of the first air flow channel on the left side is connected to the third chamber, and the other end is connected to the first The interior of the outer box is connected, one end of the first air flow channel on the right is connected to the fourth chamber, and the other end thereof is connected to the interior of the second outer box; axial fans are installed at the first air flow channel on the left side wall of the third chamber and the first air flow channel on the right side wall of the fourth chamber; second air flow channels are opened at the bottom of the left side wall and the bottom of the right side wall of the cabinet, one end of the second air flow channel on the left is connected to the first chamber, and the other end thereof is connected to the fifth chamber, and one end of the second air flow channel on the right is connected to the second chamber, and the other end thereof is connected to the eighth chamber; desiccant filter layers are provided in the sixth chamber and the seventh chamber, and third air flow channels are opened at the bottom of the sixth chamber and the seventh chamber.

[0008] Furthermore, a transverse driving mechanism is installed at the top end of the first transverse partition and the bottom end of the second transverse partition, and the transverse driving mechanism is used to drive the sliding baffle to slide in the sliding groove.

[0009] Furthermore, the two desiccant filter layers are bilaterally symmetrical structures; a limiting component is provided on the top and bottom of each desiccant filter layer, and the limiting component is used to fix the position of the desiccant filter layer.

[0010] Furthermore, the desiccant filter layer is made of silica gel desiccant or montmorillonite desiccant.

[0011] Furthermore, a heating device is installed inside the sixth chamber and the seventh chamber, and the heating device is located above the desiccant filter layer.

[0012] Furthermore, the desiccant filter layer is made of color-changing silica gel desiccant; the outer side walls of the first outer box and the second outer box are both provided with observation windows, and transparent glass plates are installed in the observation windows, and the observation windows are located outside the desiccant filter layer.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] When the control cabinet is in operation, the air outside the cabinet, whether it enters the cabinet through the first outer box and then flows out from the second outer box, or flows into the cabinet through the second outer box and then flows out from the first outer box, can be dried and dehumidified by the desiccant filter layer before entering the cabinet, so as to prevent moist air from entering the cabinet and causing electronic components to get damp or short circuit. One of the desiccant filter layers dries and dehumidifies, while the other desiccant filter layer can be dehydrated and restored to activity by heat. The two desiccant filter layers alternately dry and dehumidify and dehydrate by heat, which can ensure the moisture-proof performance of the control cabinet. The desiccant has the ability to restore activity by dehydration, and there is no need to replace the desiccant, which can enable the control cabinet to operate for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention;

[0016] Figure 2 It is the front view of the present invention;

[0017] Figure 3 for Figure 1 A magnified schematic diagram of the local structure at center A;

[0018] Figure 4 for Figure 1 A magnified schematic diagram of the local structure at point B in the middle;

[0019] Figure 5 for Figure 1 Schematic diagram of the cross-sectional structure in the CC direction;

[0020] Figure 6 for Figure 1 Schematic diagram of the cross-sectional structure in the middle DD direction;

[0021] Figure 7 for Figure 1 Schematic diagram of the cross-sectional structure in the EE direction;

[0022] Component names in the figure: 1. Cabinet body 2. First transverse partition 3. First chamber 4. First vertical partition 5. Sliding baffle 6. Second chamber 7. Transverse drive mechanism 7.1. Motor 7.2. Screw rod 8. Second outer box body 9. Third vertical partition 10. Seventh chamber 11. Eighth chamber 12. Heating device 13. First air flow channel 14. Second transverse partition 15. Fourth chamber 16. Second vertical partition 17. Third chamber 18. Axial fan 19. First outer box body 20. Insulation layer 21. Fifth chamber 22. Sixth chamber 23. Observation window 24. Transparent glass plate 25. Desiccant filter layer 26. Limiting assembly 26.1. Limiting frame plate 26.2. Grille plate 26.3. Silk screen 27. Second air flow channel 28. Third air flow channel 29. Dust filter 30. Cabinet door 31. Slide groove 32. Air flow groove 33. Threaded sleeve. DETAILED DESCRIPTION

[0023] The present invention will be further described below through specific embodiments in conjunction with the accompanying drawings, but the present invention is not limited thereto. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

[0024] Example 1

[0025] The moisture-proof control cabinet described in this embodiment is as follows: Figures 1 to 4As shown, it includes a cabinet 1, a first horizontal partition 2 is installed at the bottom of the cabinet 1, a first vertical partition 4 is installed at the bottom of the first horizontal partition 2, and the first vertical partition 4 divides the space below the first horizontal partition 2 into a first chamber 3 and a second chamber 6; a second horizontal partition 14 is installed at the top of the cabinet 1, a second vertical partition 16 is installed on the top of the second horizontal partition 14, and the second vertical partition 16 divides the space above the second horizontal partition 14 into a third chamber 17 and a fourth chamber 15; the space between the first horizontal partition 2 and the second horizontal partition 14 is used to install electronic components of the control cabinet; the top end of the first horizontal partition 2 and the bottom end of the second horizontal partition 14 are both provided with a slide groove 31, two air flow grooves 32 are formed at the bottom end of the first transverse partition 2 and the top end of the second transverse partition 14; the two air flow grooves 32 on the first transverse partition 2 are symmetrical along the first vertical partition 4, and each air flow groove 32 is connected to the chute 31 on the first transverse partition 2; the two air flow grooves 32 on the second transverse partition 14 are symmetrical along the second vertical partition 16, and each air flow groove 32 is connected to the chute 31 on the second transverse partition 14; a sliding baffle 5 is slidably provided in each chute 31, and the sliding baffle 5 can block one of the air flow grooves 32 connected to the chute 31, preventing air from passing through one of the air flow grooves 32, allowing air to pass through the other air flow groove 32;

[0026] A first outer box 19 is installed on the left side of the cabinet 1, and a second outer box 8 is installed on the right side thereof. The first outer box 19 and the second outer box 8 are symmetrically arranged on the left and right sides of the cabinet 1; a third vertical partition 9 is installed inside the first outer box 19 and the second outer box 8, and the interior of the first outer box 19 is divided into a fifth chamber 21 and a sixth chamber 22 by the third vertical partition 9, and the interior of the second outer box 8 is divided into a seventh chamber 10 and an eighth chamber 11 by the third vertical partition 9, the top of the fifth chamber 21 is connected to the top of the sixth chamber 22, and the top of the seventh chamber 10 is connected to the top of the eighth chamber 11; a first air flow channel 13 is provided at the top of the left side wall and the top of the right side wall of the cabinet 1, one end of the first air flow channel 13 on the left is connected to the third chamber 17, and the other end thereof is connected to the interior of the first outer box 19, and the first air flow channel 13 on the right is connected One end of the flow channel 13 is connected to the fourth chamber 15, and the other end is connected to the interior of the second outer box 8; an axial flow fan 18 is installed at the first air flow channel 13 on the left side wall of the third chamber 17 and the first air flow channel 13 on the right side wall of the fourth chamber 15. The axial flow fan 18 is used to guide the air in the cabinet 1 to flow to the outside through the first air flow channel 13; a second air flow channel 27 is opened at the bottom of the left side wall and the bottom of the right side wall of the cabinet 1, one end of the second air flow channel 27 on the left is connected to the first chamber 3, and the other end is connected to the fifth chamber 21, and one end of the second air flow channel 27 on the right is connected to the second chamber 6, and the other end is connected to the eighth chamber 11; a desiccant filter layer 25 is provided in the sixth chamber 22 and the seventh chamber 10, and a third air flow channel 28 is opened at the bottom of the sixth chamber 22 and the seventh chamber 10.

[0027] As a preferred embodiment, in this embodiment, Figure 2 As shown, a cabinet door 30 is provided on the front side of the cabinet 1 , and opening the cabinet door 30 facilitates maintenance of electronic components inside the cabinet 1 .

[0028] As a preferred embodiment, in this embodiment, the front side wall of the cabinet 1 is provided with an opening for installing the cabinet door 30, and a step groove is provided on the front side of the opening of the front side wall of the cabinet 1. The cabinet door 30 is installed in the step groove. The right end of the cabinet door 30 is connected to the front side wall of the cabinet 1 by a hinge, and the left end is connected to the front side wall of the cabinet 1 by a lock. Specifically, the left end front side wall of the cabinet door 30 is provided with a movable part of the lock, and the front side wall of the cabinet 1 is provided with a fixed part of the lock; a sealing ring is provided in the step groove on the cabinet 1. When the cabinet door 30 is closed with the cabinet 1, the sealing ring can seal the contact surface gap between the cabinet door 30 and the cabinet 1 to prevent air inside and outside the cabinet 1 from entering and exiting the cabinet door 30.

[0029] As a preferred embodiment, in this embodiment, Figure 1 and Figure 4As shown, a dust filter 29 is provided in each third air flow channel 28, and the air is filtered of impurities by the dust filter 29 before entering the outer box.

[0030] The working principle and technical effect of this embodiment are as follows: when the control cabinet is configured for water conservancy and hydropower engineering equipment, the switchgear, measuring instruments, protective electrical appliances and auxiliary equipment of the water conservancy and hydropower engineering equipment are installed inside the cabinet body 1. Although the control cabinet of the water conservancy and hydropower engineering equipment usually operates in a humid environment, the control cabinet has a good moisture-proof effect. The moisture-proof principle of the control cabinet is as follows:

[0031] When the control cabinet is operating normally, the sliding baffle 5 in the slide groove 31 on the first transverse partition 2 blocks one of the air flow slots 32. Taking the sliding baffle 5 blocking the air flow slot 32 on the right side of the slide groove 31 on the first transverse partition 2 as an example, the sliding baffle 5 in the slide groove 31 on the second transverse partition 14 blocks the air flow slot 32 on its left side accordingly, and the axial flow fan 18 on the right side is started. The air outside the cabinet 1 enters the sixth chamber 22 through the third air flow channel 28 at the bottom of the first outer box 19. The air is dried and dehumidified through the desiccant filter layer 25. The dried air enters the fifth chamber 21 at the top of the sixth chamber 22, and then enters the first chamber 3 through the second air flow channel 27 at the bottom of the fifth chamber 21, and then enters the interior of the cabinet 1 through the unblocked left air flow slot 32 and the slide groove 31 on the first transverse partition 2. When the air outside the cabinet 1 enters the interior of the cabinet 1 through this path, it is dried and dehumidified by the desiccant filter layer 25, which can reduce the cabinet The risk of electronic components in the cabinet 1 getting damp is eliminated. The air in the cabinet 1 enters the fourth chamber 15 through the slide groove 31 on the second transverse partition 14 and an unblocked air flow groove 32 on the right side. Driven by the axial flow fan 18 on the right, the air enters the interior of the second outer box 8 through the first air flow channel 13 on the right side, and enters the seventh chamber 10 from the top of the second outer box 8. The air flows downward through the desiccant filter layer 25 in the seventh chamber 10, and finally flows out from the third air flow channel 28 at the bottom of the seventh chamber 10 to the outside of the second outer box 8. During the entire process of air entering and exiting the cabinet 1, it is driven and guided by the axial flow fan 18 on the right side, and can promote the heat dissipation of the electronic components inside the cabinet 1. The air flowing out of the cabinet 1 carries the heat generated by the electronic components. When flowing through the desiccant filter layer 25 in the seventh chamber 10, the desiccant is heated, which can promote the dehydration of the desiccant in the desiccant filter layer 25, which is beneficial to the restoration of the activity of the desiccant.

[0032] On the contrary, taking the sliding baffle 5 blocking the air flow slot 32 on the left side of the slide slot 31 on the first transverse partition 2 as an example, the sliding baffle 5 in the slide slot 31 on the second transverse partition 14 correspondingly blocks the air flow slot 32 on its right side, and the axial flow fan 18 on the left is started. The air outside the cabinet 1 enters the seventh chamber 10 through the third air flow channel 28 at the bottom of the second outer box 8, and the air is dried and dehumidified through the desiccant filter layer 25. The dried air enters the eighth chamber 11 at the top of the seventh chamber 10, and then enters the second chamber 6 through the second air flow channel 27 at the bottom of the eighth chamber 11, and then enters the interior of the cabinet 1 through an unblocked right side air flow slot 32 and slide slot 31 on the first transverse partition 2. When the air outside the cabinet 1 enters the interior of the cabinet 1 through this path, it is dried and dehumidified by the desiccant filter layer 25, which can reduce the risk of moisture to the electronic components in the cabinet 1, and the air in the cabinet 1 The air enters the third chamber 17 through the chute 31 on the second transverse partition 14 and an unblocked air flow slot 32 on the left side. Driven by the axial flow fan 18 on the left, the air enters the interior of the first outer box 19 through the first air flow channel 13 on the left, and enters the sixth chamber 22 from the top of the first outer box 19. The air flows downward through the desiccant filter layer 25 in the sixth chamber 22, and finally flows out from the third air flow channel 28 at the bottom of the sixth chamber 22 to the outside of the first outer box 19. The air is driven and guided by the axial flow fan 18 on the right during the entire process of entering and exiting the cabinet 1, and can promote the heat dissipation of the electronic components inside the cabinet 1. The air flowing out of the cabinet 1 carries the heat generated by the electronic components. When flowing through the desiccant filter layer 25 in the sixth chamber 22, the desiccant is heated, which can promote the dehydration of the desiccant in the desiccant filter layer 25, which is beneficial to the restoration of the activity of the desiccant.

[0033] No matter the air outside the cabinet 1 enters the cabinet 1 through the first outer box 19 and flows out from the second outer box 8, or flows into the cabinet 1 through the second outer box 8 and flows out from the first outer box 19, the air can be dried and dehumidified by the desiccant filter layer 25 before entering the cabinet 1, so as to prevent humid air from entering the interior of the cabinet 1 and causing electronic components to get damp or a circuit short circuit. One of the desiccant filter layers 25 dries and dehumidifies, and the other desiccant filter layer 25 is heated and dehydrated to restore its activity. The two desiccant filter layers 25 alternately dry and dehumidify and heat and dehydrate, which can ensure the moisture-proof performance of the control cabinet. There is no need to replace the desiccant, and the control cabinet can operate for a long time. The control cabinet is suitable for use as a control cabinet for water conservancy and hydropower engineering equipment, and can operate for a long time in a humid working environment. It has good moisture-proof performance. In addition, it is also suitable for use as a control cabinet for other mechanical equipment.

[0034] Example 2

[0035] This embodiment further illustrates the technology. Figure 1 、 Figure 3 and Figure 6As shown, the top end of the first transverse partition 2 and the bottom end of the second transverse partition 14 are both installed with a transverse driving mechanism 7, which is used to drive the sliding baffle 5 to slide in the slide groove 31, so that the sliding baffle 5 can alternately block the two air flow grooves 32 connected to the slide groove 31.

[0036] As a preferred embodiment, in this embodiment, Figure 1 、 Figure 3 and Figure 6 As shown, the transverse driving mechanism 7 includes a motor 7.1 and a screw rod 7.2; at the top end of the first transverse partition 2, the motor 7.1 is fixedly installed on the first transverse partition 2, one end of the screw rod 7.2 is connected to the first transverse partition 2 through a bearing seat, and the other end thereof is transmission-connected to the rotating shaft of the motor 7.1, and a threaded sleeve 33 is threadedly connected to the screw rod 7.2, and the sliding baffle 5 is fixedly connected to the threaded sleeve 33. When the motor 7.1 drives the screw rod 7.2 to rotate, the threaded sleeve 33 drives the sliding baffle 5 to move left and right in the sliding groove 31. When the sliding baffle 5 moves to the leftmost end of the sliding groove 31 on the first transverse partition 2, the sliding baffle 5 blocks the air flow groove 32 on the left. Conversely, when the sliding baffle 5 moves to the rightmost end of the sliding groove 31 on the first transverse partition 2, the sliding baffle 5 blocks the air flow groove 32 on the right.

[0037] At the bottom end of the second transverse partition 14, the motor 7.1 is fixedly installed on the second transverse partition 14, one end of the screw rod 7.2 is connected to the second transverse partition 14 through a bearing seat, and the other end thereof is transmission-connected to the rotating shaft of the motor 7.1, and a threaded sleeve 33 is threadedly connected to the screw rod 7.2, and the sliding baffle 5 is fixedly connected to the threaded sleeve 33. When the motor 7.1 drives the screw rod to the leftmost end of the slide groove 31 on the second transverse partition 14, the sliding baffle 5 blocks the air flow groove 32 on the left. Conversely, when the sliding baffle 5 moves to the rightmost end of the slide groove 31 on the second transverse partition 14, the sliding baffle 5 blocks the air flow groove 32 on the right; in addition to this structure, the transverse driving mechanism 7 can also be a slider guide structure or a gear rack structure, which are all well-known technologies and their specific structures are not listed here.

[0038] As a preferred embodiment, in this embodiment, a controller is installed inside or outside the cabinet 1, and the two axial fans 18 and the two motors 7.1 are electrically connected to the controller, and the controller is used to control the start and stop of the two axial fans 18 and the two motors 7.1 respectively; it should be noted here that the axial fans 18 and the motors 7.1 are both existing technology equipment, which can be purchased online and offline, and the controller is an existing technology equipment, which can choose an ATMEGA16 general-purpose single-chip microcomputer controller or a Mitsubishi PLC controller. It is a conventional technology to control the alternating start and stop of the two axial fans 18 and the alternating start and stop of the two motors 7.1, which can be achieved using an existing controller.

[0039] The working principle and technical effect of this embodiment are as follows: during the operation of the control cabinet, it should be ensured that the sliding baffle 5 in the upper groove 31 of the first transverse partition 2 blocks the air flow groove 32 on the left side, and the sliding baffle 5 in the upper groove 31 of the second transverse partition 14 blocks the air flow groove 32 on the right side, or the sliding baffle 5 in the upper groove 31 of the first transverse partition 2 blocks the air flow groove 32 on the right side, and the sliding baffle 5 in the upper groove 31 of the second transverse partition 14 blocks the air flow groove 32 on the left side. The two states form two flow paths for air to enter and exit the cabinet body 1; if it is necessary to switch the air flow path, the controller controls the motor 7.1 on the first transverse partition 2 to start, and the motor 7.1 drives the screw rod 7.2 rotates to move the sliding baffle 5 in the slide groove 31. Similarly, the controller controls the start-up of the motor 7.1 on the second transverse partition 14, and the motor 7.1 drives the screw rod 7.2 to rotate to move the sliding baffle 5 in the slide groove 31. After this switching, it is also necessary to use the controller to control the two axial flow fans 18 to switch to ensure that there are axial flow fans 18 on the air flow path as the power of air flow; the controller can be used to set the time interval for starting and stopping the motor 7.1 and the axial flow fan 18. After the set time is reached, the air flow path is automatically switched, so that the two desiccant filter layers 25 can alternately dry and dehumidify and dehydrate to restore activity, thereby ensuring the moisture-proof effect of the control cabinet.

[0040] Example 3

[0041] This embodiment further illustrates the technology. Figure 1 and Figure 4 As shown, the two desiccant filter layers 25 are bilaterally symmetrical structures; a limiting component 26 is provided at the top and bottom of each desiccant filter layer 25 , and the limiting component 26 is used to fix the desiccant filter layer 25 .

[0042] As a preferred embodiment, in this embodiment, the limiting assembly 26 at the top of the desiccant filter layer 25 and the limiting assembly 26 at its bottom are downwardly symmetrical structures; each limiting assembly 26 includes a limiting frame plate 26.1, a grid plate 26.2 and a wire mesh 26.3, and the grid plate 26.2 is located between the limiting frame plate 26.1 and the wire mesh 26.3; the wire mesh 26.3 at the top of the desiccant filter layer 25 can prevent the desiccant filter layer 25 from being blown upward when the air flows upward, and the wire mesh at the bottom of the desiccant filter layer 25 26.3 can prevent the desiccant filter layer 25 from leaking downward; the grid plate 26.2 on the top of the desiccant filter layer 25 can limit the position of the wire mesh 26.3, and the limiting frame plate 26.1 on the top of the desiccant filter layer 25 can limit the position of the grid plate 26.2; the grid plate 26.2 at the bottom of the desiccant filter layer 25 can support the wire mesh 26.3 and the desiccant filter layer 25, and the limiting frame plate 26.1 at the bottom of the desiccant filter layer 25 can support the grid plate 26.2, wire mesh 26.3 and desiccant filter layer 25 thereon.

[0043] The working principle and technical effect of this embodiment are as follows: when the air outside the cabinet 1 enters through the first outer box 19, the air flows upward through the desiccant filter layer 25 in the sixth chamber 22 of the first outer box 19. After the air enters the interior of the cabinet 1, it flows out from the second outer box 8 under the action of the axial flow fan 18. The air flows downward through the desiccant filter layer 25 in the seventh chamber 10 of the second outer box 8. The wire mesh 26.3 and the grid plate 26.2 can ensure the stability of the desiccant filter layer 25 and prevent the desiccant from being overheated. filter layer 25 leaks; on the contrary, when the air outside the cabinet 1 enters through the second outer box 8, the air flows upward through the desiccant filter layer 25 in the seventh chamber 10 of the second outer box 8. After the air enters the interior of the cabinet 1, it flows out from the first outer box 19 under the action of the axial flow fan 18. The air flows downward through the desiccant filter layer 25 in the sixth chamber 22 of the first outer box 19. The wire mesh 26.3 and the grid plate 26.2 can ensure the stability of the desiccant filter layer 25 and prevent the desiccant filter layer 25 from leaking.

[0044] Example 4

[0045] This embodiment further illustrates the technology. The desiccant filter layer 25 is made of silica gel desiccant or montmorillonite desiccant. Both silica gel desiccant and montmorillonite desiccant have good water absorption and dehumidification capabilities and can be dehydrated and restored to activity for reuse. In addition, the desiccant filter layer 25 can also be made of a mixture of silica gel desiccant and montmorillonite desiccant, or made of a desiccant with dehydration recovery activity, such as a molecular sieve desiccant and activated alumina.

[0046] The working principle and technical effect of this embodiment are as follows: the air outside the cabinet 1 enters through one of the outer boxes (the first outer box 19 or the second outer box 8), and the air in the outer box flows upward through the desiccant filter layer 25. The desiccant filter layer 25 can absorb moisture in the air, making the air dry and dehumidified. The dried and dehumidified air then enters the interior of the cabinet 1 through the air flow groove 32 on the first transverse partition 2; the electronic components inside the cabinet 1 will generate heat during operation, and the air can carry the heat and flow from the air flow groove 32 on the second transverse partition 14 to the outside of the cabinet 1. The axial fan 18 serves as a power source on the air flow path, which can promote the inside and outside of the cabinet 1. The air flows out of the cabinet 1 and carries heat into another outer box (the second outer box 8 or the first outer box 19). In this outer box, the air flows downward through the desiccant filter layer 25. The hot air has a heating effect on the desiccant in the desiccant filter layer 25. After being heated, the desiccant can be dehydrated and restored to its activity, thereby restoring its water absorption capacity. By switching the air flow path, the air can enter the cabinet 1 alternately from the two outer boxes. The desiccant filter layer 25 in one outer box is dried and dehumidified, and the desiccant in the other outer box is heated, dehydrated and restored to its activity, which can ensure the moisture-proof performance of the control cabinet. There is no need to replace the desiccant, and the control cabinet can operate for a long time.

[0047] Example 5

[0048] This embodiment further illustrates the technology. Figure 1 、 Figure 5 and Figure 7 As shown, a heating device 12 is installed inside the sixth chamber 22 and the seventh chamber 10, and the heating device 12 is located above the desiccant filter layer 25. When the air in the cabinet 1 flows to the outside, it can first be heated by the heating device 12 and then flow downward through the desiccant filter layer 25 to increase the temperature of the air and promote the desiccant filter layer 25 to be heated and dehydrated and restored to activity.

[0049] As a preferred embodiment, in this embodiment, the heating device 12 is an electric heating tube or a heating wire, and the heating device 12 is electrically connected to the controller. The controller is used to control the two heating devices 12 to operate alternately, and the heating device 12 on the left and the axial flow fan 18 on the left start and stop synchronously, and the heating device 12 on the right and the axial flow fan 18 on the right start and stop synchronously.

[0050] As a preferred embodiment, in this embodiment, the left outer wall and the right outer wall of the cabinet 1 are both provided with an insulation layer 20. Specifically, the insulation layer 20 can be provided only within the range covered by the outer box body, and the left outer wall and the right outer wall of the cabinet 1 located outside the outer box body are not provided with the insulation layer 20. This structure can reduce the heat generated by the heating device 12 from entering the interior of the cabinet body 1 and affecting the electronic components.

[0051] The working principle and technical effects of this embodiment are as follows: when the control cabinet is in operation, the air outside the cabinet 1 enters through one of the outer boxes (the first outer box 19 or the second outer box 8) and flows out from the other outer box (the second outer box 8 or the first outer box 19). The heat carried by the air flowing out of the cabinet 1 is limited. When the air enters the other outer box through the axial fan 18, the heating device 12 in the outer box is powered on to generate heat to heat the air. After being heated, the air flows downward through the desiccant filter layer 25 in the outer box. The hot air has a heating effect on the desiccant in the desiccant filter layer 25. After being heated, the desiccant can be dehydrated and restored to activity, thereby restoring its water absorption capacity. While the air is circulating, the air is dried and dehumidified and the desiccant is dehydrated and restored to activity, so that the control cabinet always has good moisture-proof performance and can operate for a long time. The heating device 12 can increase the temperature of the air and promote the desiccant filter layer 25 to be heated and dehydrated and restored to activity.

[0052] Example 6

[0053] This embodiment further illustrates the technology. Figure 1 、 Figure 4 and Figure 6As shown, the desiccant filter layer 25 is made of color-changing silica gel desiccant; the outer side walls of the first outer box body 19 and the second outer box body 8 are both provided with an observation window 23, and a transparent glass plate 24 is installed in the observation window 23. The observation window 23 is located on the outside of the desiccant filter layer 25. The transparent glass plate 24 can be used to easily observe the color of the desiccant in the desiccant filter layer 25 in the outer box to determine its water absorption capacity and whether it is saturated with water.

[0054] As a preferred embodiment, in this embodiment, the desiccant filter layer 25 can be made of blue silica gel desiccant or orange silica gel desiccant; the blue silica gel desiccant is blue in the dry state and turns red after absorbing moisture and losing its effectiveness; the orange silica gel desiccant is orange-yellow in the dry state and turns green after absorbing moisture.

[0055] The working principle and technical effect of this embodiment are as follows: when the control cabinet is in operation, the air flow path can be automatically switched at regular intervals by the controller, but the staff can also observe the color of the desiccant in the desiccant filter layer 25 inside the first outer box 19 or the second outer box 8 through the observation window 23 to judge the water absorption capacity of the desiccant and whether it is saturated with water. Under normal circumstances, when the desiccant filter layer 25 absorbs water and dehumidifies, air flows upward through the desiccant filter layer 25, and the color change of the desiccant in the lower part of the desiccant filter layer 25 is greater than that of the desiccant in the upper part. The drying and dehumidification capacity of the desiccant filter layer 25 can be judged by observing the color difference. If the color of the desiccant in the upper part of the desiccant filter layer 25 has changed significantly and the air flow path has not been automatically switched by the controller, the air flow path can be manually switched to ensure the moisture-proof performance of the control cabinet.

Claims

1. A moisture-proof control cabinet, comprising a cabinet body (1), characterized in that: A first transverse partition (2) is installed at the bottom of the cabinet (1), a first vertical partition (4) is installed at the bottom of the first transverse partition (2), and the first vertical partition (4) divides the space below the first transverse partition (2) into a first chamber (3) and a second chamber (6); a second transverse partition (14) is installed at the top of the cabinet (1), a second vertical partition (16) is installed at the top of the second transverse partition (14), and the second vertical partition (16) divides the space above the second transverse partition (14) into a third chamber (17) and a fourth chamber (15); the top and The bottom end of the second transverse partition (14) is provided with a chute (31), and the bottom end of the first transverse partition (2) and the top end of the second transverse partition (14) are provided with two air flow grooves (32); the two air flow grooves (32) on the first transverse partition (2) are symmetrical along the first vertical partition (4), and each air flow groove (32) is connected to the chute (31); the two air flow grooves (32) on the second transverse partition (14) are symmetrical along the second vertical partition (16), and each air flow groove (32) is connected to the chute (31); a sliding baffle (5) is slidably provided in each chute (31); A first outer box (19) is installed on the left side of the cabinet (1), and a second outer box (8) is installed on the right side thereof; a third vertical partition (9) is installed inside the first outer box (19) and the second outer box (8); the interior of the first outer box (19) is divided into a fifth chamber (21) and a sixth chamber (22); the interior of the second outer box (8) is divided into a seventh chamber (10) and an eighth chamber (11); the top of the fifth chamber (21) is communicated with the top of the sixth chamber (22), and the top of the seventh chamber (10) is communicated with the top of the eighth chamber (11); a first air flow channel (13) is provided on the top of the left side wall and the top of the right side wall of the cabinet (1); one end of the first air flow channel (13) on the left side is communicated with the third chamber (17), and the other end thereof is communicated with the interior of the first outer box (19); the first air flow channel (13) on the right side is communicated with the third chamber (17). ) is communicated with the fourth chamber (15) at one end, and communicated with the interior of the second outer box (8) at the other end; an axial flow fan (18) is installed at the first air flow channel (13) on the left side wall of the third chamber (17) and the first air flow channel (13) on the right side wall of the fourth chamber (15); a second air flow channel (27) is provided at the bottom of the left side wall and the bottom of the right side wall of the cabinet (1); one end of the second air flow channel (27) on the left side is communicated with the first chamber (3), and the other end thereof is communicated with the fifth chamber (21); one end of the second air flow channel (27) on the right side is communicated with the second chamber (6), and the other end thereof is communicated with the eighth chamber (11); a desiccant filter layer (25) is provided in the sixth chamber (22) and the seventh chamber (10), and a third air flow channel (28) is provided at the bottom of the sixth chamber (22) and the seventh chamber (10).

2. The moisture-proof control cabinet according to claim 1, characterized in that: A transverse drive mechanism (7) is installed at the top end of the first transverse partition (2) and the bottom end of the second transverse partition (14). The transverse drive mechanism (7) is used to drive the sliding baffle (5) to slide in the slide groove (31).

3. The moisture-proof control cabinet according to claim 1, characterized in that: The two desiccant filter layers (25) are bilaterally symmetrical structures; a limiting component (26) is provided at the top and bottom of each desiccant filter layer (25), and the limiting component (26) is used to fix the desiccant filter layer (25).

4. The moisture-proof control cabinet according to claim 3, characterized in that: The desiccant filter layer (25) is made of silica gel desiccant or montmorillonite desiccant.

5. The moisture-proof control cabinet according to claim 4, characterized in that: A heating device (12) is installed inside the sixth chamber (22) and the seventh chamber (10), and the heating device (12) is located above the desiccant filter layer (25).

6. The moisture-proof control cabinet according to claim 4, characterized in that: The desiccant filter layer (25) is made of color-changing silica gel desiccant; the outer side walls of the first outer box (19) and the second outer box (8) are both provided with an observation window (23), and a transparent glass plate (24) is installed in the observation window (23); the observation window (23) is located outside the desiccant filter layer (25).

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