Power distribution cabinet dehumidification device
By designing exhaust and dehumidification components in the power distribution cabinet, combined with temperature and humidity detection and a fresh air dehumidifier, the condensation problem in the power distribution cabinet was solved, achieving effective heat dissipation and dehumidification, and ensuring stable equipment operation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-13
- Publication Date
- 2026-03-27
AI Technical Summary
Existing distribution cabinets are prone to condensation in high humidity environments, which leads to reduced insulation strength of electrical components, corrosion, and equipment damage. The existing dehumidification capacity is insufficient.
A dehumidification device for a power distribution cabinet was designed, comprising an exhaust component and a dehumidification component. The device adjusts ventilation and dehumidification in real time by detecting temperature and humidity, uses a fresh air dehumidifier to filter out moisture in the air, and combines the switching of the baffle plate to achieve effective heat dissipation and dehumidification.
It achieves effective heat dissipation and dehumidification inside the distribution cabinet, ensuring the stable operation of electrical equipment, preventing condensation, and extending equipment life.
Smart Images
Figure CN121748952A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application belongs to the field of power distribution cabinet equipment, and particularly relates to a power distribution cabinet dehumidification device. BACKGROUND
[0002] As a key equipment for power distribution and control, the power distribution cabinet is widely used in industrial, commercial and civil buildings. A large number of precise electrical components such as circuit breakers, contactors, relays and intelligent control units are concentrated in the cabinet. The normal operation of these components has strict requirements on the environment in the cabinet, especially the air humidity. In areas with large diurnal temperature difference or high air humidity (such as coastal, riverside and basement environments), moisture aggregation problem is prone to occur in the power distribution cabinet. The existing power distribution cabinet generally only has the functions of heat dissipation and ventilation, and has poor dehumidification capacity. When the air temperature in the cabinet drops below the dew point, water vapor will condense into liquid droplets and adhere to the metal surfaces of insulators, terminal blocks, circuit boards and components, forming "condensation". The condensation phenomenon will reduce the insulation strength of electrical components, cause partial discharge or surface flashover, accelerate the electrochemical corrosion of metal conductors, connection terminals and structural parts in the cabinet, increase the contact resistance, and cause overheating or even burning. For intelligent electronic devices such as PLC and comprehensive protection devices, condensation can cause short circuit of circuit boards and corrosion of components, resulting in control failure or permanent damage to the equipment. SUMMARY
[0003] In order to solve the problems of the prior art, the present application provides a power distribution cabinet dehumidification device. The device can detect the temperature and humidity of the power distribution cabinet in real time, and can dehumidify and effectively regulate the ventilation and heat dissipation power in the cabinet according to the changes of the temperature and humidity in the cabinet, so as to ensure the stable operation of the power distribution equipment.
[0004] In order to achieve the above purpose, the technical scheme adopted by the present application is as follows: A power distribution cabinet dehumidification device, comprising a cabinet body and a dehumidification and ventilation mechanism, power distribution electrical equipment is installed in the cabinet body, the dehumidification and ventilation mechanism comprises an air extraction assembly and a dehumidification assembly, the air extraction assembly comprises a wind box and a fan installed on the top of the cabinet body, a first air outlet is formed on the top of the cabinet body, the wind box is covered on the first air outlet, and the fan is installed on the second air outlet on the wind box; the dehumidification assembly comprises a shell and a fresh air dehumidifier, a first air hole and a second air hole are formed on the lower side of the cabinet body, the shell is covered and installed at the second air hole, an air inlet is formed on the side of the shell, a third air hole is formed on the top of the shell, a partition plate is vertically and fixedly arranged in the shell, a fourth air hole is transversely and longitudinally formed on the partition plate, the air inlet of the fresh air dehumidifier is communicated with the third air hole, and the air outlet is communicated with the first air hole; a baffle and a switching assembly are movably installed in the shell, the switching assembly is connected with the baffle, and is used for driving the baffle to switch between blocking the third air hole and the fourth air hole; a temperature detector and a humidity detector are further installed in the cabinet body.
[0005] Preferably, a switching cavity is formed in the shell between the baffle and the air inlet, the wind baffle is arranged in the switching cavity, the upper end of the wind baffle is rotationally connected to the inner top corner of the switching cavity, and the switching assembly is used to drive the wind baffle to vertically flip between the third air hole and the fourth air hole.
[0006] Preferably, the switching assembly comprises a screw rod, a motor, a base and a rotating drum, the base is horizontally mounted on the inner side wall of the shell close to the second air hole, the motor is horizontally mounted on the base towards the inner wall of the shell, a first bevel gear is coaxially mounted on the output shaft of the motor, the vertical part of the L-shaped plate is rotationally connected to the inner wall of the shell through a first rotating shaft, the first rotating shaft is coaxially arranged with the output shaft of the motor, a through hole is formed in the horizontal part of the L-shaped plate, the rotating drum is rotationally mounted in the through hole in a concentric manner, a second bevel gear is coaxially fixed to the end of the rotating drum, and the second bevel gear is vertically engaged with the first bevel gear; the upper end of the screw rod is hingedly connected below the wind baffle, the other end of the screw rod coaxially penetrates the through hole, the rotating drum and the second bevel gear and extends outwards, and the inner wall of the rotating drum is threadedly sleeved on the screw rod.
[0007] Preferably, an obstacle-avoiding notch is formed in the base below the screw rod.
[0008] Preferably, a wind hole adjusting assembly is mounted at the first air outlet in the wind box.
[0009] Preferably, the wind hole adjusting assembly comprises a circular horizontally arranged lower disc and an upper disc, the lower disc is concentrically fixed at the first air outlet, the upper disc is rotationally mounted on the lower disc in a concentric manner through an annular bearing, a circular hole is formed in the middle of the upper disc and the lower disc in a concentric and corresponding manner, a plurality of arc-shaped plates are arranged between the upper disc and the lower disc, and the arc-shaped plates are annularly and crossly arranged with the center of the circular hole as the center; one end of the arc-shaped plate is rotationally connected to the lower disc through a second rotating shaft, and the other end is rotationally connected to the upper disc through a third rotating shaft; a hanging piece is fixed to the outer edge of the upper disc, and the hanging piece is connected to a rotary driving assembly.
[0010] Preferably, the rotary driving assembly comprises a telescopic cylinder, the tail of the telescopic cylinder is rotationally connected in the wind box, and the piston rod at the other end is rotationally connected to the hanging piece.
[0011] Preferably, the annular bearing is arranged on the outer side of the arc-shaped plate and is concentrically mounted close to the outer edge of the lower disc.
[0012] Preferably, a filter screen is vertically mounted inside the shell close to the air inlet.
[0013] The present application has the beneficial effects that: 1. Under normal heat dissipation operation (non-dehumidification), the outside air enters the cabinet through the air inlet via the suction action of the fan, and is then discharged through the first and second exhaust vents, thus achieving ventilation and heat dissipation within the cabinet. In actual operation, under real-time monitoring by a temperature detector, the airflow can be adjusted by regulating the fan's power. Furthermore, the extension and retraction of the telescopic cylinder can rotate the upper plate via the mounting plates, which in turn rotates the lower arc-shaped plate, adjusting the diameter of the exhaust vents. This adaptively adjusts the ventilation rate within the cabinet, ensuring effective heat dissipation for the electrical equipment while also being more energy-efficient and environmentally friendly.
[0014] 2. During normal heat dissipation operation, the baffle plate is horizontally positioned, blocking the third air vent. At this time, the fresh air dehumidifier is not working, and outside air enters the cabinet through the air inlet, the fourth air vent, and the second air vent. When dehumidification is required, the switching component rotates the baffle plate downwards by 90 degrees, making it vertical and blocking the second air vent. At this time, the fresh air dehumidifier operates, and outside air enters the dehumidifier through the air inlet and the third air vent, and is then sent into the cabinet through the first air vent. The fresh air dehumidifier can effectively filter out the moisture in the outside air, thereby continuously sending dry air into the cabinet and blowing out the moisture inside the cabinet, thus achieving effective heat dissipation and dehumidification inside the cabinet and ensuring the stable operation of the electrical equipment.
[0015] 3. When the switching component of this application drives the baffle plate to switch between the third and fourth air holes, the motor drives the first bevel gear to rotate, which in turn drives the second bevel gear to rotate the drum on the L-shaped plate. This causes the screw to move up and down along the axis of the drum, thereby driving the baffle plate to flip, thus achieving the blocking and switching between the third and fourth air holes. When the screw moves, the L-shaped plate can rotate around the first rotating shaft and keep the second bevel gear and the first bevel gear always perpendicularly meshed, thus achieving stable power transmission. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the housing of the present invention; Figure 3 This is a partial structural schematic diagram of the switching component of the present invention; Figure 4 This is a schematic diagram of the installation of the L-shaped plate of the present invention; Figure 5 This is a schematic diagram of the structure of the rotary drive assembly of the present invention; Figure 6 This is a schematic diagram of the structure of the lower plate of the present invention; Detailed Implementation
[0017] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are for illustrative purposes only and are not intended to limit the scope of the invention.
[0018] like Figures 1-6 As shown, this invention proposes a dehumidification device for a power distribution cabinet, including a cabinet 1 and a dehumidification fan 21. The power distribution equipment is installed inside the cabinet 1. The dehumidification fan 21 includes an exhaust assembly and a dehumidification assembly. The exhaust assembly includes an air box 2 and a fan 21 installed on the top of the cabinet 1. A first exhaust vent 11 is provided on the top surface of the cabinet 1. A temperature detector and a humidity detector are also installed inside the cabinet 1. The temperature detector and humidity detector can monitor the temperature and humidity changes inside the cabinet 1 in real time, thereby adjusting the working efficiency of the dehumidification fan 21.
[0019] The air box 2 is mounted on the first exhaust vent 11, and the fan 21 is installed at the second exhaust vent on the top of the air box 2. The fan 21 is a suction fan 21, which can draw air out of the cabinet 1. An air outlet adjustment assembly is installed at the first exhaust vent 11 inside the air box 2. The air outlet adjustment assembly includes a lower plate 71 and an upper plate 72, which are arranged horizontally in a circle. The lower plate 71 is concentrically fixed at the first exhaust vent 11, and the upper plate 72 is concentrically mounted on the lower plate 71 via a ring bearing 75. Specifically, the ring bearing 75 is located on the outside of the arc plate 73 and concentrically mounted near the outer edge of the lower plate 71. The upper plate 72 and the lower plate 71 are concentrically positioned with corresponding circular holes in the middle. Multiple arc-shaped plates 73 are positioned between the upper plate 72 and the lower plate 71, arranged in a circular, intersecting pattern around the center of each circular hole. The central portion of each arc-shaped plate 73 forms an air vent. One end of each arc-shaped plate 73 is rotatably connected to the lower plate 71 via a second rotating shaft 761, and the other end is rotatably connected to the upper plate 72 via a third rotating shaft 762. A hanging plate is fixed to the outer edge of the upper plate 72, and the hanging plate is connected to the rotary drive assembly. In this embodiment, the rotary drive assembly includes a telescopic cylinder 74, the tail of which is rotatably connected to the air box 2, and the piston rod at the other end is rotatably connected to the hanging plate.
[0020] Under normal heat dissipation operation (non-dehumidification), the outside air enters the cabinet 1 through the air inlet 41 and the housing 4 via the suction action of the fan 21, and is then discharged through the first and second exhaust vents 11, thus achieving ventilation and heat dissipation within the cabinet 1. In actual operation, under real-time monitoring by a temperature detector, the airflow can be adjusted by regulating the working power of the fan 21. Furthermore, the telescopic cylinder 74's extension and retraction action can rotate the upper plate 72 via the hanging plate, which in turn rotates the lower arc-shaped plate 73, thereby adjusting the diameter of the air vents. This adaptively adjusts the ventilation rate within the cabinet, ensuring effective heat dissipation for the electrical equipment while also being more energy-efficient and environmentally friendly.
[0021] The dehumidification assembly includes a housing 4 and a fresh air dehumidifier 3. A first air vent 12 and a second air vent 13 are provided on the lower side of the cabinet 1. The housing 4 is fitted over the second air vent 13. An air inlet 41 is provided on the side of the housing 4 corresponding to the second air vent 13. A filter screen is vertically installed inside the housing 4 near the air inlet 41. The filter screen effectively filters the air entering the housing 4, preventing external dust and impurities from entering the cabinet 1 and affecting the stability of the equipment operation. A third air vent 42 is provided on the top of the housing 4. A partition 43 is vertically fixed inside the housing 4 between the second air vent 13 and the third air vent 42. A fourth air vent 431 is horizontally penetrating the partition 43. The air inlet of the fresh air dehumidifier 3 is connected to the third air vent 42, and the exhaust end is connected to the first air vent 12. In this embodiment, the fresh air dehumidifier 3 adopts a commonly used fresh air dehumidification device on the market, the principle and structure of which are well known to those skilled in the art.
[0022] A baffle plate 5 and a switching assembly are movably installed inside the housing 4. The switching assembly is connected to the baffle plate 5 and is used to drive the baffle plate 5 to switch between blocking the third air hole 42 and the fourth air hole 431. Specifically, a switching cavity is formed inside the housing 4 between the partition plate 43 and the air inlet 41. The baffle plate 5 is movably disposed in the switching cavity, and the upper end of the baffle plate 5 is rotatably connected to the inner top corner of the switching cavity. The switching assembly is used to drive the baffle plate 5 to vertically rotate between the third air hole 42 and the fourth air hole 431. The switching assembly includes a screw 61, a motor 62, a base 63, and a rotating drum 65. The base 63 is horizontally mounted on the inner wall of the housing 4 near the second air vent 13. The motor 62 is horizontally mounted on the base 63 facing the inner wall of the housing 4. A first bevel gear 621 is coaxially mounted on the output shaft of the motor 62. The vertical part of the L-shaped plate 64 is rotatably connected to the inner wall of the housing 4 through a first rotating shaft 641, which is coaxially arranged with the output shaft of the motor 62. A through hole 640 is provided on the horizontal part of the L-shaped plate 64. A rotating drum 65 is concentrically mounted at the through hole 640. A second bevel gear 66 is coaxially fixed at the end of the rotating drum 65. The second bevel gear 66 meshes perpendicularly with the first bevel gear 621. The upper end of the screw 61 is hinged to the bottom of the baffle plate 5, and the other end extends coaxially through the through hole 640, the rotating drum 65, and the second bevel gear 66. The inner wall of the rotating drum 65 is threaded onto the screw 61. An obstacle avoidance notch 630 is provided on the base 63 below the screw 61. The obstacle avoidance notch 630 provides space for the movement of the screw 61 and prevents the base 63 from affecting the screw 61 when it swings.
[0023] During normal heat dissipation operation, the baffle plate 5 is horizontally positioned, blocking the third air vent 42. At this time, the fresh air dehumidifier 3 is not working, and outside air enters the cabinet 1 through the air inlet 41, the fourth air vent 431, and the second air vent 13. When dehumidification is required, the switching component rotates the baffle plate 5 downwards by 90 degrees, making it vertical and blocking the second air vent 13. At this time, the fresh air dehumidifier 3 is working, and outside air enters the fresh air dehumidifier 3 through the air inlet 41 and the third air vent 42, and is then sent into the cabinet 1 through the first air vent 12. The fresh air dehumidifier 3 can effectively filter out the moisture in the outside air, thereby continuously sending dry air into the cabinet 1 and blowing out the moisture inside the cabinet 1, thus achieving effective heat dissipation and dehumidification inside the cabinet 1 and ensuring the stable operation of the electrical equipment.
[0024] When the switching component drives the wind deflector 5 to switch between the third air hole 42 and the fourth air hole 431, the motor 62 drives the first bevel gear 621 to rotate, which in turn drives the second bevel gear 66 to drive the rotating drum 65 on the L-shaped plate 64 to rotate. This allows the screw 61 to move up and down along the axis of the rotating drum 65, thereby driving the wind deflector 5 to flip, thus achieving the blocking and switching between the third air hole 42 and the fourth air hole 431. When the screw 61 moves, the L-shaped plate 64 can rotate around the first rotating shaft 641 and keep the second bevel gear 66 and the first bevel gear 621 in perpendicular meshing, thus achieving stable power transmission.
[0025] Obviously, the embodiments described above are only some embodiments of this application, not all embodiments. The accompanying drawings show preferred embodiments of this application, but do not limit the patent scope of this application. This application can be implemented in many different forms; rather, the purpose of providing these embodiments is to provide a more thorough and comprehensive understanding of the disclosure of this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this application's specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the scope of patent protection of this application.
Claims
1. A dehumidification device for a power distribution cabinet, comprising a cabinet and a dehumidification and ventilation mechanism, wherein electrical distribution equipment is installed inside the cabinet, characterized in that: The dehumidification and ventilation mechanism includes an exhaust component and a dehumidification component. The exhaust component includes an air box and a fan installed on the top of the cabinet. A first exhaust vent is opened on the top of the cabinet, the air box is covered on the first exhaust vent, and the fan is installed on a second exhaust vent on the air box. The dehumidification component includes a housing and a fresh air dehumidifier. A first air hole and a second air hole are opened on the lower side of the cabinet. The housing is covered and installed at the second air hole. An air inlet is opened on the side of the housing, and a third air hole is opened on the top of the housing. A partition is vertically fixed inside the housing, and a fourth air hole is opened horizontally through the partition. The air inlet end of the fresh air dehumidifier is connected to the third air hole, and the exhaust end is connected to the first air hole. A baffle plate and a switching component are movably installed inside the housing. The switching component is connected to the baffle plate and is used to drive the baffle plate to switch between blocking the third air hole and the fourth air hole. A temperature detector and a humidity detector are also installed inside the cabinet.
2. The dehumidification device for the distribution cabinet according to claim 1, characterized in that: A switching cavity is formed inside the housing between the partition and the air inlet. The baffle is located in the switching cavity, and the upper end of the baffle is rotatably connected to the inner top corner of the switching cavity. The switching assembly is used to drive the baffle to rotate vertically between the third air hole and the fourth air hole.
3. The dehumidification device for the distribution cabinet according to claim 2, characterized in that: The switching assembly includes a screw, a motor, a base, and a rotating cylinder. The base is horizontally mounted on the inner wall of the housing near the second air vent. The motor is horizontally mounted on the base facing the inner wall of the housing. A first bevel gear is coaxially mounted on the output shaft of the motor. The vertical part of the L-shaped plate is rotatably connected to the inner wall of the housing via a first rotating shaft, which is coaxially arranged with the output shaft of the motor. A through hole is provided on the horizontal part of the L-shaped plate. The rotating cylinder is concentrically rotatably mounted at the through hole. A second bevel gear is coaxially fixed at the end of the rotating cylinder, and the second bevel gear meshes perpendicularly with the first bevel gear. The upper end of the screw is hinged to the bottom of the baffle plate, and the other end extends coaxially through the through hole, the rotating cylinder, and the second bevel gear. The inner wall of the rotating cylinder is threaded onto the screw.
4. The dehumidification device for the distribution cabinet according to claim 3, characterized in that: An obstacle avoidance notch is provided on the base below the screw.
5. The dehumidification device for the distribution cabinet according to claim 1, characterized in that: An air outlet adjustment component is installed at the first air outlet inside the air box.
6. The dehumidification device for the distribution cabinet according to claim 5, characterized in that: The air vent adjustment assembly includes a lower plate and an upper plate arranged horizontally in a circle. The lower plate is concentrically fixed at the first air vent, and the upper plate is concentrically rotatably mounted on the lower plate via a ring bearing. The upper and lower plates have concentrically corresponding circular holes in their middle. Multiple arc-shaped plates are provided between the upper and lower plates, and the arc-shaped plates are arranged in a ring with the center of the circular holes as the center. One end of each arc-shaped plate is rotatably connected to the lower plate via a second rotating shaft, and the other end is rotatably connected to the upper plate via a third rotating shaft. A hanging plate is fixedly provided on the outer edge of the upper plate, and the hanging plate is connected to a rotary drive assembly.
7. The dehumidification device for the distribution cabinet according to claim 6, characterized in that: The rotary drive assembly includes a telescopic cylinder, the tail of which is rotatably connected to the bellows, and the piston rod at the other end is rotatably connected to the hanging plate.
8. The dehumidification device for the distribution cabinet according to claim 6, characterized in that: The annular bearing is installed concentrically on the outer side of the arc-shaped plate, near the outer edge of the lower plate.
9. The dehumidification device for the distribution cabinet according to claim 1, characterized in that: A filter screen is vertically installed inside the housing near the air inlet.