A moisture-proof ventilation mechanism of an outdoor power distribution cabinet

Abstract

The present application relates to power distribution equipment technical field, especially provide a kind of outdoor switchgear's dampproof ventilation mechanism, comprising: first mounting plate, second mounting plate, first fan, second fan, dehumidification component and temperature sensor.The first fan is configured, in the temperature in switchgear rises to greater than or equal to first preset temperature value and less than second preset temperature value, start, after outside air enters switchgear through first air inlet, flow through dehumidification component from second air outlet;Second fan is configured, in the temperature in switchgear continues to rise to greater than or equal to second preset temperature value, start, after outside air enters switchgear through second air inlet, flow through dehumidification component from first air outlet.The scheme of the present application, when the temperature in switchgear is higher, control airflow reverse flow through dehumidification component, utilize high-temperature gas in switchgear to dry dehumidification component, so that dehumidification component is recycled, thereby reduce the maintenance cost of equipment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power distribution equipment, and particularly relates to a moisture-proof ventilation mechanism of an outdoor power distribution cabinet. BACKGROUND

[0002] During the operation of the power distribution cabinet, the internal electrical components continuously generate heat. If the heat is not dissipated in time, the high temperature will seriously threaten the performance and service life of the components, and therefore effective heat dissipation measures must be taken. At the same time, the electrical components have strict requirements on the working environment and need to be in a dry state for a long time to reduce the risk of short circuit. The power distribution cabinet in the prior art usually uses a fan to make the gas flow between the power distribution cabinet and the outside environment for heat dissipation. However, while introducing outside air to achieve cooling, water vapor and dust are easily brought into the cabinet. The water vapor condenses on the surface of the electrical components, which can easily cause short circuit failure of the electrical components. The dust deposited on the surface of the electrical components not only can cause short circuit failure, but also can reduce the heat dissipation efficiency, thereby greatly increasing the maintenance frequency and maintenance cost of the equipment. SUMMARY

[0003] An object of the present application is to dry the power distribution cabinet, reduce the risk of short circuit failure of the equipment due to condensed water, and further reduce the use and maintenance cost of the equipment.

[0004] Another object of the present application is to remove dust from the airflow flowing into the power distribution cabinet, thereby reducing the risk of short circuit failure of the equipment due to dust accumulation.

[0005] In particular, the present application provides a moisture-proof ventilation mechanism of an outdoor power distribution cabinet, comprising: a first mounting plate, a second mounting plate, a first fan, a second fan, a dehumidification assembly, and a temperature sensor; the first mounting plate and the second mounting plate are respectively arranged at a first air inlet and a second air inlet of the power distribution cabinet; the first fan and the second fan are respectively arranged on the first mounting plate and the second mounting plate; the dehumidification assembly is arranged on the inner side of the first fan and dehumidifies the air entering the power distribution cabinet through the first air inlet; the temperature sensor is arranged in the power distribution cabinet and detects the temperature in the power distribution cabinet; the first fan is configured to be started when the temperature in the power distribution cabinet rises to be greater than or equal to a first preset temperature value and less than a second preset temperature value, so that the outside air enters the power distribution cabinet through the first air inlet and then flows through the dehumidification assembly and is discharged from the second air inlet; the second fan is configured to be started when the temperature in the power distribution cabinet continues to rise to be greater than or equal to the second preset temperature value, so that the outside air enters the power distribution cabinet through the second air inlet and then flows through the dehumidification assembly and is discharged from the first air inlet; the inner side of the first mounting plate is provided with a fixed frame, and the dehumidification assembly is movably arranged in the fixed frame; a driving device is arranged on the fixed frame and connected with the dehumidification assembly, and is used to drive the movement of the dehumidification assembly; the driving device is configured to drive the dehumidification assembly to move after the second fan is started, so that the path length of the airflow through the dehumidification assembly is shortened.

[0006] Further, the first fan is further configured to be switched from the starting state to the stopping state when the temperature in the power distribution cabinet falls to less than or equal to a third preset temperature value; the second fan is configured to be switched from the starting state to the stopping state when the temperature in the power distribution cabinet falls to less than or equal to a fourth preset temperature value; wherein the third preset temperature value is less than the first preset temperature, and the fourth preset temperature value is greater than the first preset temperature value and less than the second preset temperature value.

[0007] Further, the moisture-proof ventilation mechanism of the outdoor power distribution cabinet further comprises: a first filter plate arranged on the first mounting plate and located between the first fan and the dehumidifying assembly; and a second filter plate arranged on the second mounting plate and located inside the second fan; wherein the air permeability of the second filter plate is higher than that of the first filter plate.

[0008] Further, the dehumidifying assembly comprises: a movable frame in a horizontal U shape, movably arranged in the fixed frame, a plurality of first slits arranged on the top wall and the bottom wall of the movable frame in a spaced manner, and a plurality of second slits arranged on the side wall of the movable frame in a spaced manner; and a plurality of dehumidifying plates arranged vertically in the movable frame and spaced along the air supply path of the first fan and opposite to the plurality of first slits; wherein the sum of the thicknesses of the plurality of dehumidifying plates is greater than the maximum height of the dehumidifying plates; the fixed frame is in a horizontal U shape, and a plurality of third slits are arranged on the top wall and the bottom wall of the fixed frame in a spaced manner, and a plurality of fourth slits are arranged on the side wall of the fixed frame in a spaced manner; the movable frame is configured to move under the drive of the driving device so that the first slits and the third slits are opposite or staggered; wherein when the first slits and the third slits are opposite, the side wall of the movable frame and the side wall of the fixed frame are in close contact, so that the second slits and the fourth slits are blocked.

[0009] Further, the driving device is configured to drive the movable frame to move so that the first slits and the second slits are opposite after the second fan is started for a preset time.

[0010] Further, the height of the dehumidifying plate and the distance between the dehumidifying plate and the first fan are negatively correlated.

[0011] Further, the moisture-proof ventilation mechanism of the outdoor power distribution cabinet further comprises: a deflector plate arranged on the first mounting plate and located above the fixed frame, for guiding the airflow vertically through the dehumidifying plate to the first air inlet.

[0012] Further, the moisture-proof ventilation mechanism of the outdoor power distribution cabinet further comprises: a first grating arranged on the first mounting plate and located outside the first fan; and a second grating arranged on the second mounting plate and located outside the second fan; wherein the grating bars of the first grating and the second grating are all arranged outwardly inclined from top to bottom.

[0013] Further, the first mounting plate and the second mounting plate are respectively arranged on two opposite side walls of the power distribution cabinet, and the mounting position of the first mounting plate is higher than that of the second mounting plate.

[0014] The beneficial effects of the present application are:

[0015] The moisture-proof ventilation mechanism of the outdoor power distribution cabinet has the beneficial effects that: the dehumidification assembly is arranged on the inner side of the first fan, and the start and stop of the first fan and the second fan are controlled according to the temperature in the power distribution cabinet, so that when the temperature in the power distribution cabinet is low, cold air enters the power distribution cabinet through the first fan and the dehumidification assembly, and the dehumidification assembly is used to dehumidify the airflow, so that the power distribution cabinet is kept dry while being cooled, and the risk of short circuit failure of the equipment due to condensed water is reduced, thereby reducing the maintenance cost. When the temperature in the power distribution cabinet is high, the first fan stops running, and the second fan starts running, so that the high-temperature airflow in the power distribution cabinet flows in the opposite direction and is discharged from the first air outlet after passing through the dehumidification assembly, so that the dehumidification assembly is dried by the high-temperature gas, realizing the recycling of the dehumidification assembly, thereby reducing the daily maintenance frequency of the dehumidification assembly, and further reducing the use cost and maintenance cost of the equipment.

[0016] Further, the moisture-proof ventilation mechanism of the outdoor power distribution cabinet has the beneficial effects that: the first filter plate and the second filter plate are arranged to filter and remove dust from the air entering the power distribution cabinet, thereby reducing the risk of short circuit failure of the electrical elements in the power distribution cabinet due to dust accumulation. The air permeability of the second filter plate is set to be higher than that of the first filter plate, so that when the temperature is high, the airflow entering the power distribution cabinet from the outside has smaller resistance, so that the flow rate of the airflow increases, thereby improving the heat dissipation efficiency while taking into account the dust removal effect, and meeting the heat dissipation demand of the power distribution cabinet under high temperature conditions. BRIEF DESCRIPTION OF DRAWINGS

[0017] Some specific embodiments of the present application will be described in detail hereinafter with reference to the accompanying drawings, which are shown by way of example and are not limiting. The same reference numerals in the drawings denote the same or similar components or parts. In the drawings:

[0018] Figure 1 is an assembly schematic view of the moisture-proof ventilation mechanism of the outdoor power distribution cabinet and the power distribution cabinet according to an embodiment of the present application;

[0019] Figure 2 is a structural schematic view of the outdoor power distribution cabinet according to an embodiment of the present application;

[0020] Figure 3 is an assembly schematic view of the moisture-proof ventilation mechanism of the outdoor power distribution cabinet and the power distribution cabinet from another angle according to an embodiment of the present application;

[0021] Figure 4 is a schematic sectional view taken along the section line A-A in Figure 3 ;

[0022] Figure 5 is Figure 4 a schematic enlarged view of region C in

[0023] Figure 6 is Figure 3 a schematic cross-sectional view taken along section line B-B in

[0024] Figure 7 is Figure 6 a schematic enlarged view of region D in

[0025] Figure 8 is Figure 6 a schematic enlarged view of region E in

[0026] Figure 9 is a schematic assembly view of the moisture-proof ventilation mechanism of the outdoor power distribution cabinet and the power distribution cabinet from another angle according to an embodiment of the present application; wherein the flow path of the air flow is shown;

[0027] Figure 10 is a structural schematic view of the first mounting plate, the dehumidification assembly, the air deflector and the first grid according to an embodiment of the present application;

[0028] Figure 11 is a structural schematic view of the first mounting plate, the dehumidification assembly, the air deflector and the first grid from another angle according to an embodiment of the present application;

[0029] Figure 12 is Figure 11 a schematic cross-sectional view taken along section line F-F in

[0030] Figure 13 is Figure 12 a structural schematic view of the moving frame in moving to make the first hole and the third hole staggered in

[0031] Figure 14 is Figure 11 a schematic cross-sectional view taken along section line G-G in

[0032] wherein:

[0033] 01, power distribution cabinet; 02, first air inlet; 03, second air inlet; 10, moisture-proof ventilation mechanism; 100, first mounting plate; 110, first fan; 120, first filter plate; 130, fixed frame; 131, third hole; 132, fourth hole; 140, air deflector; 150, first grid; 200, second mounting plate; 210, second fan; 220, second filter plate; 230, second grid; 300, dehumidification assembly; 310, moving frame; 311, first hole; 312, second hole; 313, lug plate; 320, dehumidification plate; 400, temperature sensor; 500, driving device; 510, screw rod. DETAILED DESCRIPTION

[0034] In order to make the objects, technical solutions and advantages of the present application clearer, the following further describes the present application in conjunction with the embodiments and the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present application and should not be used to limit the present application.

[0035] The terms "first", "second", etc. are used only for descriptive purposes and should not be construed as indicating or implying relative importance or implying the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features, i.e. one or more of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited. When a certain feature "includes or contains" a certain or certain features, unless otherwise specifically described, it indicates that other features are not excluded and can further include other features.

[0036] Unless otherwise specifically defined and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be broadly understood, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. Those skilled in the art should be able to understand the specific meaning of the above terms in the present application according to the specific circumstances.

[0037] The moisture-proof ventilation mechanism 10 of the outdoor power distribution cabinet provided by the present application will be described below with reference to Figures 1 to 14

[0038] The moisture-proof ventilation mechanism 10 of the outdoor power distribution cabinet provided by the present application will be described below with reference to Figures 1 to 14 The moisture-proof ventilation mechanism 10 of the outdoor power distribution cabinet provided by the present application will be described below with reference to The moisture-proof ventilation mechanism 10 of the outdoor power distribution cabinet provided by the present application will be described below with reference to

[0038]

[0039] The first installation plate 100 and the second installation plate 200 are respectively arranged at the first air inlet 02 and the second air inlet 03 of the power distribution cabinet 01. The first fan 110 and the second fan 210 are respectively arranged on the first installation plate 100 and the second installation plate 200. The dehumidification assembly 300 is arranged on the inner side of the first fan 110, and dehumidifies the air entering the power distribution cabinet 01 through the first air inlet 02. The temperature sensor 400 is arranged in the power distribution cabinet 01 to detect the temperature in the power distribution cabinet 01. The first fan 110 is configured to be started when the temperature in the power distribution cabinet 01 rises to be greater than or equal to a first preset temperature value and less than a second preset temperature value, so that the external air enters the power distribution cabinet 01 through the first air inlet 02 and then flows through the dehumidification assembly 300 and is discharged from the second air inlet 03. The second fan 210 is configured to be started when the temperature in the power distribution cabinet 01 continues to rise to be greater than or equal to the second preset temperature value, so that the external air enters the power distribution cabinet 01 through the second air inlet 03 and then flows through the dehumidification assembly 300 and is discharged from the first air inlet 02.

[0040] As shown in Figures 6-9 The first fan 110 and the second fan 210 are vertically arranged. When the first fan 110 is started, the external air enters the power distribution cabinet 01 through the first air inlet 02, then flows through the dehumidification assembly 300, and finally is discharged through the second air inlet 03. When the second fan 210 is started, the external air enters the power distribution cabinet 01 through the second air inlet 03, and then is discharged from the first air inlet 02 through the dehumidification assembly 300.

[0041] The scheme of the embodiment controls the start and stop of the first fan 110 and the second fan 210 according to the temperature in the power distribution cabinet 01 by arranging the dehumidification assembly 300 on the inner side of the first fan 110, so that when the temperature in the power distribution cabinet 01 is low, the cold air enters the power distribution cabinet 01 through the first fan 110 and then flows through the dehumidification assembly 300, and the dehumidification assembly 300 dehumidifies the airflow, thereby keeping the power distribution cabinet 01 dry and reducing the risk of short circuit failure of the equipment due to condensed water, thereby reducing the maintenance cost. When the temperature in the power distribution cabinet 01 is high, the first fan 110 is stopped and the second fan 210 is started, so that the high-temperature airflow in the power distribution cabinet 01 flows in the opposite direction and is discharged from the first air inlet 02 after passing through the dehumidification assembly 300. The dehumidification assembly 300 is dried by the high-temperature gas generated by the electrical elements in the power distribution cabinet 01, thereby realizing the recycling of the dehumidification assembly 300, reducing the frequency of daily maintenance of the dehumidification assembly 300, and thereby reducing the use cost and maintenance cost of the equipment.

[0042] The first preset temperature value is preferably set to 25℃, and the second preset temperature value is preferably set to 40℃.

[0043] The temperature sensor 400 is preferably arranged in the area of the power distribution cabinet 01 where the electrical elements are relatively dense, and the area with the highest temperature in the power distribution cabinet 01 is monitored in real time. The first fan 110 and the second fan 210 are controlled according to the temperature in the power distribution cabinet 01, so that the heat dissipation mode of the power distribution cabinet 01 can be switched in time and adapted to the temperature in the power distribution cabinet 01, thereby ensuring the stable operation of the power distribution cabinet 01.

[0044] In a further embodiment, the first fan 110 is further configured to transition from the start state to the stop state when the temperature in the power distribution cabinet 01 drops to less than or equal to a third preset temperature value. The second fan 210 is configured to transition from the start state to the stop state when the temperature in the power distribution cabinet 01 drops to less than or equal to a fourth preset temperature value. The third preset temperature value is less than the first preset temperature, and the fourth preset temperature value is greater than the first preset temperature value and less than the second preset temperature value.

[0045] The scheme of the present embodiment sets the start-stop temperature (i.e. the third preset temperature value and the fourth preset temperature value) of the first fan 110 and the second fan 210 during the temperature drop process of the power distribution cabinet 01 to be lower than the start-stop temperature (i.e. the first preset temperature value and the second preset temperature value) during the temperature rise process, thereby avoiding frequent start-stop of the first fan 110 and the second fan 210 when the temperature of the power distribution cabinet 01 fluctuates around a certain temperature value (i.e. the first preset temperature value, or the second preset temperature value, or the third preset temperature value, or the fourth preset temperature value), which causes equipment failure, and making the operation of the first fan 110 and the second fan 210 more stable, thereby ensuring the service life of the first fan 110 and the second fan 210.

[0046] The third preset temperature value is preferably set to 20℃, and the fourth preset temperature value is preferably set to 35℃.

[0047] In a further embodiment, the moisture-proof ventilation mechanism 10 of the outdoor power distribution cabinet can also generally include a first filter plate 120 and a second filter plate 220. The first filter plate 120 is arranged on the first mounting plate 100 and located between the first fan 110 and the dehumidifying assembly 300. The second filter plate 220 is arranged on the second mounting plate 200 and located inside the second fan 210. The air permeability of the second filter plate 220 is higher than that of the first filter plate 120.

[0048] The scheme of the present embodiment purifies and filters the air flowing into the power distribution cabinet 01 from the outside through the first filter plate 120 and the second filter plate 220, thereby reducing the probability of dust entering the power distribution cabinet 01 from the outside and reducing the risk of short circuit failure of the electrical elements due to dust accumulation.

[0049] Further, the scheme of the embodiment sets the air permeability of the second filter plate 220 to be higher than that of the first filter plate 120, so that the air flow has less resistance when passing through the second filter plate 220, and the air flow has higher filtering accuracy when passing through the first filter plate 120. When the temperature in the power distribution cabinet 01 is high, the heat dissipation requirement of the power distribution cabinet 01 is high, and the air flow flows into the power distribution cabinet 01 under the action of the second fan 210 through the second filter plate 220, so that the flow rate of the air flow is increased, thereby improving the heat dissipation efficiency. When the temperature in the power distribution cabinet 01 is low, the heat dissipation requirement of the power distribution cabinet 01 is low at this time, and the air flow flows into the power distribution cabinet 01 under the action of the first fan 110 through the first filter plate 120, so that the air flow is cleaner, thereby further reducing the risk of dust entering the power distribution cabinet 01 from the outside while taking into account the heat dissipation effect.

[0050] The first filter plate 120 preferably uses filter cotton with low porosity, and the second filter plate 220 preferably uses filter cotton with high porosity.

[0051] The inner side of the first mounting plate 100 is provided with a fixed frame 130, and the dehumidification assembly 300 is movably arranged in the fixed frame 130. The fixed frame 130 is provided with a driving device 500 connected with the dehumidification assembly 300 for driving the movement of the dehumidification assembly 300. The driving device 500 is configured to drive the dehumidification assembly 300 to move after the second fan 210 is started, so that the path length of the air flow passing through the dehumidification assembly 300 is shortened.

[0052] The scheme of the embodiment drives the dehumidification assembly 300 to move by using the driving device 500 after the second fan 210 is started, thereby changing the flow path of the air flow passing through the dehumidification assembly 300. The path length of the air flow passing through the dehumidification assembly 300 is shortened, so that the resistance of the air flow passing through the dehumidification assembly 300 is reduced, thereby improving the flow rate of the air flow while drying the dehumidification assembly 300 by using high-temperature air flow, and further improving the heat dissipation efficiency.

[0053] In some embodiments, the dehumidification assembly 300 can include a moving frame 310 and a plurality of dehumidification plates 320. The moving frame 310 is in a horizontal U shape and is movably arranged in the fixed frame 130. A plurality of first holes 311 are arranged on the top wall and the bottom wall of the moving frame 310 in a spaced manner. A plurality of second holes 312 are arranged on the side wall of the moving frame 310 in a spaced manner. The plurality of dehumidification plates 320 are arranged vertically in the moving frame 310 and are arranged in a spaced manner along the air supply path of the first fan 110 and are opposite to the plurality of first holes 311. The sum of the thicknesses of the plurality of dehumidification plates 320 is greater than the maximum height of the dehumidification plate 320. The fixed frame 130 is in a horizontal U shape. A plurality of third holes 131 are arranged on the top wall and the bottom wall of the fixed frame 130 in a spaced manner. A plurality of fourth holes 132 are arranged on the side wall of the fixed frame 130 in a spaced manner. The moving frame 310 is configured to move under the driving of the driving device 500 so that the first holes 311 and the third holes 131 are opposite or staggered. When the first holes 311 and the third holes 131 are opposite, the side wall of the moving frame 310 and the side wall of the fixed frame 130 abut, so that the second holes 312 and the fourth holes 132 are blocked.

[0054] According to the scheme of the present embodiment, by arranging the first holes 311 and the second holes 312 on the moving frame 310 and arranging the third holes 131 and the fourth holes 132 on the fixed frame 130, the on-off state between the first holes 311 and the third holes 131 and between the second holes 312 and the fourth holes 132 is changed by moving the moving frame 310, so that the flow path of the air flow is changed.

[0055] After the second fan 210 is started, the moving frame 310 moves under the driving of the driving device 500 so that the side wall thereof abuts against the side wall of the fixed frame 130, the first holes 311 and the third holes 131 are opposite, and the second holes 312 and the fourth holes 132 are blocked. Under the action of the second fan 210, the air flow vertically flows upward through the third holes 131, the first holes 311, the dehumidification plates 320, and then flows out from the first air outlet 02. After the first fan 110 is started, the moving frame 310 moves under the driving of the driving device 500 so that the side wall thereof is away from the side wall of the fixed frame 130, the first holes 311 and the third holes 131 are staggered, and the second holes 312 and the fourth holes 132 are communicated. Under the action of the first fan 110, the air flow flows laterally through the fourth holes 132, the second holes 312, the dehumidification plates 320, and then flows out from the second air outlet 03.

[0056] As shown in FIG. 1, the air conditioner 100 includes a fixed frame 130, a moving frame 310, a plurality of dehumidification plates 320, a first fan 110, a second fan 210, a driving device 500, and a control device 600. Figure 5As shown, in some embodiments, the driving device 500 can be configured as a motor, the side of the moving frame 310 is provided with an ear plate 313, and the motor is connected with a screw rod 510. The screw rod 510 penetrates through the ear plate 313 and is screwed with the ear plate 313. When the motor is started, the screw rod 510 is driven to rotate forward or reversely, thereby driving the ear plate 313 to move, and further driving the moving frame 310 to move relative to the fixed frame 130. In some embodiments, a guide column or a guide groove can be further arranged between the moving frame 310 and the fixed frame 130, so that the movement of the moving frame 310 is smoother.

[0057] In another embodiment, the driving device 500 can be configured as a pneumatic cylinder, the pneumatic cylinder is connected with a telescopic structure, and the telescopic structure is connected with the moving frame 310. When the pneumatic cylinder is started, the telescopic structure is driven to extend or retract, thereby driving the moving frame 310 to move relative to the fixed frame 130.

[0058] In yet another embodiment, the driving device 500 can be configured as an electromagnetic device, and a magnet can be arranged on the sliding frame. The electromagnetic device generates a magnetic force to push or attract the sliding frame to move.

[0059] The main component of the dehumidification plate 320 is a desiccant. The desiccant used in the dehumidification plate 320 can generally be a silica gel desiccant, or a montmorillonite desiccant, or a nano desiccant.

[0060] In a further embodiment, the driving device 500 is configured to drive the moving frame 310 to move after the second fan 210 is started for a preset time, so that the first hole 311 and the third hole 131 are opposite to each other.

[0061] According to the scheme of the embodiment, the driving device 500 drives the moving frame 310 to move after the second fan 210 is started for a preset time, so that when the running time of the second fan 210 does not reach the preset time, the gas in the power distribution cabinet 01 flows in the horizontal direction and reversely through the dehumidification plate 320 under the action of the second fan 210, and then flows out through the first filter plate 120 and the first fan 110. When the second fan 210 is just started, the clean gas in the power distribution cabinet 01 is used to blow back the first filter plate 120, thereby reducing the dust accumulation rate on the first filter plate 120, improving the subsequent filtering effect of the first filter plate 120, and reducing the maintenance frequency of the equipment.

[0062] With the operation of the second fan 210, external air continuously flows into the power distribution cabinet 01 through the second air port 03. After the operation time of the second fan 210 reaches the preset time, most of the gas in the power distribution cabinet 01 has been replaced by the air flowing in from the second air port 03. Since the air permeability of the second filter plate 220 is greater than that of the first filter plate 120, the gas in the power distribution cabinet 01 at this time cannot effectively backflush the first filter plate 120. Therefore, by controlling the driving device 500 to drive the moving frame 310 to move, the path of the airflow through the dehumidification plate 320 is changed, so that the airflow flows out from above the dehumidification assembly 300 and then flows out from the part of the first air port 02 above the first fan 110.

[0063] The preset time can be generally set to 30 seconds. In some preferred embodiments, the preset time can be set by comprehensively considering the air supply rate of the second fan 210 and the space size of the power distribution cabinet 01.

[0064] In further embodiments, the height of the dehumidification plate 320 and the distance between the dehumidification plate 320 and the first fan 110 are negatively correlated.

[0065] When the first fan 110 starts, external airflow passes through the dehumidification plate 320 layer by layer under the action of the first fan 110 and then enters the power distribution cabinet 01. Therefore, the closer the dehumidification plate 320 is to the first fan 110, the more water vapor it accumulates. The scheme of the present embodiment sets the height of the dehumidification plate 320 and the distance between the dehumidification plate 320 and the first fan 110 to be negatively correlated, that is, the height of the dehumidification plate 320 closer to the first fan 110 is smaller, so that when the airflow flows through the dehumidification plate 320 under the action of the second fan 210, the resistance of the dehumidification plate 320 closer to the first fan 110 to the airflow is smaller. Under the action of the second fan 210, the flow rate of the high-temperature airflow passing through the dehumidification plate 320 closer to the first fan 110 is larger, and the water vapor that can be carried away is also more. The flow rate of the high-temperature airflow is matched with the drying demand of the dehumidification plate 320, thereby improving the overall drying effect of the dehumidification plate 320 and improving the effective recycling degree of the dehumidification plate 320.

[0066] In further embodiments, the moisture-proof ventilation mechanism 10 of the outdoor power distribution cabinet can generally further include a wind deflector 140. The wind deflector 140 is arranged on the first mounting plate 100 and located above the fixed frame 130, and is used to guide the airflow vertically passing through the dehumidification plate 320 to the first air port 02.

[0067] The scheme of the present embodiment guides the airflow vertically passing through the dehumidification plate 320 upward by arranging the inclined wind deflector 140, so that the airflow flows more smoothly to the first air port 02 after passing through the dehumidification plate 320, thereby improving the heat dissipation effect.

[0068] AsFigures 6-9 As shown, in some embodiments, the first fan 110 may not completely block the first air outlet 02. When the airflow flows through the dehumidification plate 320 towards the first air outlet 02, it may bypass the first fan 110 and exit from the portion of the first air outlet 02 located on the first fan 110, thereby reducing the flow resistance of the airflow and making the airflow smoother. Similarly, the second fan 210 may not completely block the second air outlet 03. When the airflow flows through the dehumidification plate 320 towards the second air outlet 03, it may bypass the second fan 210 and exit from the portion of the second air outlet 03 located on the second fan 210, thereby reducing the flow resistance of the airflow and making the airflow smoother.

[0069] In other embodiments, the dehumidification assembly 300 may also include a horizontally placed rectangular dehumidification plate 320 and openable movable plates disposed around the dehumidification plate 320. When airflow flows in from the first air inlet 02, the movable plates at both ends of the dehumidification plate 320 are controlled to open, allowing the airflow to flow along the length of the dehumidification plate 320. When airflow flows in from the second air inlet 03, the movable plates at both the upper and lower ends of the dehumidification plate 320 are controlled to open, allowing the airflow to move along the height of the dehumidification plate 320.

[0070] In a further embodiment, the moisture-proof ventilation mechanism 10 of the outdoor power distribution cabinet may generally include a first grille 150 and a second grille 230.

[0071] The first grille 150 is disposed on the first mounting plate 100 and located outside the first fan 110. The second grille 230 is disposed on the second mounting plate 200 and located outside the second fan 210. The bars of both the first grille 150 and the second grille 230 are inclined outwards from top to bottom.

[0072] like Figure 7 , Figure 8 As shown, the solution in this embodiment uses a first grille 150 and a second grille 230 to shield the first air vent 02 and the second air vent 03. This protects the first fan 110 and the second fan 210 while preventing foreign objects from entering the distribution cabinet 01 through the first air vent 02 and the second air vent 03, thus reducing safety hazards. Furthermore, by setting the grille bars of the first grille 150 and the second grille 230 to slope outwards from top to bottom, condensation on the outer wall of the distribution cabinet 01 will drip outwards along the sloping grille bars instead of falling into the interior of the distribution cabinet 01, ensuring that the interior of the distribution cabinet 01 remains dry and further reducing the risk of failure.

[0073] In a further embodiment, the first mounting plate 100 and the second mounting plate 200 are respectively located on two opposite side walls of the power distribution cabinet 01, and the mounting position of the first mounting plate 100 is higher than that of the second mounting plate 200.

[0074] The scheme of the embodiment is that the first mounting plate 100 and the second mounting plate 200 are arranged on the opposite two side walls of the power distribution cabinet 01 respectively, so that the air flow flows back and forth between the two side walls, thereby making the flow of the air flow more smooth, thereby improving the heat dissipation effect.

[0075] Further, the scheme of the embodiment is that the position of the first mounting plate 100 is arranged to be higher than the second mounting plate 200, so that when the high-temperature air flow in the power distribution cabinet 01 flows to the first mounting plate 100 when the second fan 210 is running, the flow of the air flow is made more smooth by using the characteristics of hot air floating, thereby improving the heat dissipation efficiency. In addition, the height difference between the first mounting plate 100 and the second mounting plate 200 makes the air flow flow through most of the space in the power distribution cabinet 01 when flowing, so that the heat dissipation effect is more comprehensive and uniform.

[0076] The specific working process of the moisture-proof ventilation mechanism 10 of the outdoor power distribution cabinet provided by the application is described in combination with the above embodiment.

[0077] In the process of temperature rise in the power distribution cabinet 01, when the temperature of the power distribution cabinet 01 is lower than the first preset temperature value, the first fan 110 and the second fan 210 are in a stopped state, and the power distribution cabinet 01 is naturally cooled. When the temperature of the power distribution cabinet 01 rises to be greater than or equal to the first preset temperature value and less than the second preset temperature value, the first fan 110 starts, and the second fan 210 remains in a stopped state. When the temperature of the power distribution cabinet 01 rises to be greater than or equal to the second preset temperature value, the first fan 110 stops running, and the second fan 210 starts.

[0078] In the process of temperature drop in the power distribution cabinet 01, when the temperature of the power distribution cabinet 01 drops to be less than or equal to the fourth preset temperature value: the second fan 210 originally in the started state changes to a stopped state, and the first fan 110 originally in the stopped state changes to a started state; the second fan 210 originally in the stopped state remains in the stopped state, and the first fan 110 originally in the started state remains in the started state. When the temperature of the power distribution cabinet 01 drops to be less than or equal to the third preset temperature value: the first fan 110 originally in the started state changes to a stopped state, and the second fan 210 originally in the stopped state remains in the stopped state; the first fan 110 originally in the stopped state remains in the stopped state, and the second fan 210 originally in the stopped state remains in the stopped state.

[0079] When the first fan 110 is started, the second fan 210 is in a stop state, and the external cold air flows into the dehumidification assembly 300 through the first air outlet 02, then flows downward after passing through the multiple dehumidification plates 320 in the transverse direction, and finally flows out from the second air outlet 03. When the second fan 210 is started, the first fan 110 is in a stop state, and the external air flows into the power distribution cabinet 01 through the second air outlet 03, flows upward, passes through the dehumidification plates 320, and finally flows out from the first air outlet 02.

[0080] When the second fan 210 is started, the high-temperature gas in the power distribution cabinet 01 flows reversely through the multiple dehumidification plates 320 in the transverse direction, and then flows out from the second air outlet 03 when the running time of the second fan 210 has not reached the preset time. When the running time of the second fan 210 reaches the preset time, the driving device 500 is started to drive the moving frame 310 to move, so that the first hole 311 and the third hole 131 are relatively opened, and the second hole 312 and the fourth hole 132 are relatively closed. The high-temperature gas in the power distribution cabinet 01 vertically passes through the dehumidification plates 320 through the first hole 311 and the third hole 131, and then flows to the second air outlet 03 under the guidance of the air deflector 140.

[0081] The technical features of the above embodiments can be combined in any manner. To make the description concise, all possible combinations of the technical features in the above embodiments are not described, but as long as the combinations of the technical features do not exist contradictions, they should be considered as the scope of the present application.

[0082] The above embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of the present application. Therefore, the scope of protection of the present application should be subject to the appended claims.

Claims

1. A moisture-proof ventilation mechanism of an outdoor power distribution cabinet, characterized in that, The utility model relates to a power distribution cabinet air conditioning system, comprising: a first mounting plate and a second mounting plate arranged at a first air inlet and a second air inlet of the power distribution cabinet, respectively; a first fan and a second fan arranged on the first mounting plate and the second mounting plate, respectively; a dehumidification assembly arranged inside the first fan to dehumidify air entering the power distribution cabinet through the first air inlet; a temperature sensor arranged in the power distribution cabinet to detect the temperature in the power distribution cabinet; the first fan is configured to start when the temperature in the power distribution cabinet rises to be greater than or equal to a first preset temperature value and less than a second preset temperature value, and after outside air enters the power distribution cabinet through the first air inlet, the outside air flows through the dehumidification assembly and is discharged from the second air inlet; the second fan is configured to start when the temperature in the power distribution cabinet continues to rise to be greater than or equal to the second preset temperature value, and after outside air enters the power distribution cabinet through the second air inlet, the outside air flows through the dehumidification assembly and is discharged from the first air inlet; the inside of the first mounting plate is provided with a fixed frame, and the dehumidification assembly is movably arranged in the fixed frame; a driving device is arranged on the fixed frame and connected with the dehumidification assembly to drive the movement of the dehumidification assembly; the driving device is configured to drive the dehumidification assembly to move after the second fan starts, so that the path length of the air flow through the dehumidification assembly is shortened.

2. The moisture-proof ventilation mechanism of the outdoor power distribution cabinet according to claim 1, characterized in that, the first fan is further configured to change from a start state to a stop state when the temperature in the power distribution cabinet drops to be less than or equal to a third preset temperature value; the second fan is configured to change from a start state to a stop state when the temperature in the power distribution cabinet drops to be less than or equal to a fourth preset temperature value; wherein the third preset temperature value is less than the first preset temperature, and the fourth preset temperature value is greater than the first preset temperature value and less than the second preset temperature value.

3. The moisture-proof ventilation mechanism of the outdoor power distribution cabinet according to claim 1, characterized in that, Further comprising: a first filter plate arranged on the first mounting plate and located between the first fan and the dehumidification assembly; a second filter plate arranged on the second mounting plate and located inside the second fan; wherein the air permeability of the second filter plate is higher than that of the first filter plate.

4. The moisture-proof ventilation mechanism of the outdoor power distribution cabinet according to claim 1, characterized in that, the dehumidification assembly comprises: a movable frame in a horizontal U shape movably arranged in the fixed frame, the movable frame is provided with a plurality of first strip holes arranged at intervals on the top wall and the bottom wall, and a plurality of second strip holes are arranged at intervals on the side wall of the movable frame; a plurality of dehumidification plates vertically arranged in the movable frame and arranged at intervals along the air supply path of the first fan, opposite to a plurality of first strip holes; wherein the sum of the thicknesses of the plurality of dehumidification plates is greater than the maximum height of the dehumidification plates. The fixed frame is in a lying U shape, and a plurality of third holes are arranged on the top wall and the bottom wall of the fixed frame in a spaced manner, and a plurality of fourth holes are arranged on the side wall of the fixed frame in a spaced manner; the moving frame is configured to move under the driving of the driving device, so that the first holes and the third holes are opposite or staggered; wherein, when the first holes and the third holes are opposite, the side wall of the moving frame and the side wall of the fixed frame are in abutment, so that the second holes and the fourth holes are blocked.

5. The moisture-proof ventilation mechanism of the outdoor power distribution cabinet according to claim 4, characterized in that, The driving device is configured to drive the moving frame to move so that the first holes and the second holes are opposite after the second fan is started for a preset time.

6. The moisture-proof ventilation mechanism of the outdoor power distribution cabinet according to claim 4, characterized in that, The height of the dehumidification plate and the distance between the dehumidification plate and the first fan are negatively correlated.

7. The moisture-proof ventilation mechanism of the outdoor power distribution cabinet according to claim 4, characterized in that, Further comprising: An air deflector is arranged on the first mounting plate and above the fixed frame, and is used to guide the airflow vertically through the dehumidification plate to the first air outlet.

8. The moisture-proof ventilation mechanism of an outdoor power distribution cabinet according to claim 1, characterized in that, Further comprising: A first grating is arranged on the first mounting plate and outside the first fan; A second grating is arranged on the second mounting plate and outside the second fan; wherein, the grating bars of the first grating and the second grating are arranged outwardly inclined from top to bottom.

9. The moisture-proof ventilation mechanism of an outdoor power distribution cabinet according to claim 1, characterized in that, The first mounting plate and the second mounting plate are respectively arranged on the opposite two side walls of the power distribution cabinet, and the mounting position of the first mounting plate is higher than that of the second mounting plate.

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