Moisture-proof ventilation structure of electric control cabinet

Abstract

The present invention relates to the technical field of dehumidification of electric control cabinets, and specifically to a moisture-proof ventilation structure of an electric control cabinet, which includes a primary dehumidification unit and a secondary dehumidification unit, and the electric control components inside the electric control cabinet are installed in a first chamber, wherein the primary dehumidification unit performs preliminary dehumidification on the gas in the first chamber. After the primary dehumidification unit dehumidifies the gas, the primary dehumidification unit transports the gas to the inside of a conical tube, and by limiting the way in which the gas enters the conical tube, it is ensured that the gas entering the conical tube can flow in a spiral, and the water vapor in the gas can adhere to the side wall of the conical tube under the action of centrifugal force, thereby separating the water vapor in the gas, and the gas after the water vapor is separated is transported to the first chamber again through a conducting pipe. By arranging the primary dehumidification unit and the secondary dehumidification unit, it is ensured that the gas in the first chamber can be fully dried.

Description

Technical Field

[0001] The present invention relates to the technical field of dehumidification of electric control cabinets, and in particular to a moisture-proof ventilation structure of an electric control cabinet. Background Art

[0002] Electrical control cabinets are filled with various electronic control components. These components control and coordinate various electrical devices through numerous circuits to ensure their orderly operation. If the humidity in the cabinet exceeds the specified limit, the control components can become damp, which can easily cause short circuits. A short circuit can instantly cut off the circuit, causing related equipment to shut down. In industrial production scenarios with extremely high continuity requirements, even a brief equipment downtime can cause the production line to stall, potentially resulting in product scrap and production delays.

[0003] Prior art, such as Chinese patent application CN216312496U, discloses an air-cooled, dehumidified, and moisture-proof electric control cabinet. The document discloses a heat dissipation fan chassis positioned at the top of the electric control cabinet body. When the heat dissipation fan chassis is in operation, air from the heat dissipation fan chassis is delivered to the interior of the electric control cabinet body via air ducts for heat dissipation. The air from the interior of the electric control cabinet body is then released through heat dissipation vents to the outside of the cabinet body, maintaining internal dryness. However, in humid weather, air entering the heat dissipation fan chassis transfers humid air into the electric control cabinet. While this dissipates heat from the electric control components, the humid air can easily cause short circuits in the components, impacting their proper operation. Summary of the Invention

[0004] The present invention provides a moisture-proof ventilation structure for an electric control cabinet, so as to solve the problem that the existing electric control cabinet has poor moisture-proof effect.

[0005] The moisture-proof ventilation structure of an electric control cabinet of the present invention adopts the following technical solutions:

[0006] A moisture-proof ventilation structure for an electric control cabinet comprises a primary dehumidification unit and a secondary dehumidification unit.

[0007] The interior of the electric control cabinet is hollow, and a partition is provided inside the electric control cabinet, the partition is used to separate the interior of the electric control cabinet into a first chamber and a second chamber isolated from each other, the first chamber is used to store electronic control components; the first-level dehumidification unit is used to perform preliminary dehumidification on the gas in the first chamber, and the second-level dehumidification unit is used to dehumidify the gas dehumidified by the first-level dehumidification unit; the second-level dehumidification unit includes a conical tube, which is arranged in the second chamber, the conical tube having a first end and a second end, the diameter of the first end being larger than the diameter of the second end, the first end passing through the partition, and a bracket being provided on the first end, the bracket being provided in the first chamber, and the bracket being used to seal and support the first end; a conducting tube is coaxially provided inside the conical tube, the outer diameter of the conducting tube being smaller than the inner diameter of the first end, the conducting tube passing through the bracket, and the gas dehumidified by the first-level dehumidification unit can enter the interior of the conical tube along the tangential direction of the conical tube.

[0008] Furthermore, the first-stage dehumidification unit includes a rotating ring and a sealing ring, the sealing ring is coaxially sleeved on the outside of the cone tube, and the sealing ring is fixedly connected to the partition; the rotating ring is rotatably arranged between the sealing ring and the cone tube, and the upper end of the rotating ring passes through the partition, so that the gas in the first chamber can enter between the rotating ring and the cone tube; the cross-section of the rotating ring is slightly Leuleau triangle, and the internal contour of the sealing ring is slightly elliptical, and the rotating ring and the sealing ring are always in an eccentric state when rotating inside.

[0009] Furthermore, the rotating ring has three arc-shaped side walls, each of the arc-shaped side walls is provided with a plurality of air guide holes, and each of the air guide holes is provided with a one-way valve.

[0010] Furthermore, an auxiliary chamber can be formed between each of the arc-shaped side walls and the inner side wall of the sealing ring. When the air pressure in the auxiliary chamber is in a negative pressure state, the gas between the rotating ring and the cone tube enters the auxiliary chamber through the air guide hole.

[0011] Furthermore, the side wall of the sealing ring is provided with a first air hole connected to the inside and outside, and the gas in the auxiliary chamber is discharged from the auxiliary chamber through the first air hole. The side wall of the cone tube is provided with a second air hole, and the second air hole is arranged along the tangential direction of the cone tube. The first air hole and the second air hole are connected by a conduit.

[0012] Furthermore, a groove is provided on the inner side wall of the sealing ring, and when one end portion of the rotating ring enters the groove, the two auxiliary chambers are in a communicating state.

[0013] Furthermore, a driving source is provided on the partition, and the driving source is used to drive the rotating ring to rotate between the sealing ring and the cone tube.

[0014] Furthermore, the driving source includes a driving cylinder and a traction rod, the driving cylinder is fixedly arranged on the partition, one end of the traction rod is connected to the driving cylinder, and the other end of the traction rod is coaxially rotatably connected to the rotating ring.

[0015] Furthermore, the driving source also includes a limit block, and the partition is provided with a limit groove along the radial direction of the conical tube. The limit block is slidably set in the limit groove, the limit block is fixedly connected to the power output shaft of the driving cylinder, and the limit block is ball-hinged with one end of the traction rod.

[0016] Furthermore, a water collecting tank is provided in the second chamber, and the water collecting tank is provided below the second end.

[0017] The beneficial effects of the present invention are as follows: a moisture-proof ventilation structure of an electric control cabinet of the present invention includes a primary dehumidification unit and a secondary dehumidification unit, and a partition is set inside the electric control cabinet to divide the interior of the electric control cabinet into a first chamber and a second chamber that are isolated from each other, and the electric control components inside the electric control cabinet are installed in the first chamber, wherein the primary dehumidification unit performs preliminary dehumidification on the gas in the first chamber, and after the primary dehumidification unit dehumidifies the gas, the primary dehumidification unit transports the gas to the inside of the conical tube, and by limiting the way in which the gas enters the conical tube, it is ensured that the gas entering the inside of the conical tube can flow in a spiral, and the water vapor in the gas can adhere to the side wall of the conical tube under the action of centrifugal force, thereby separating the water vapor in the gas, and the gas after the water vapor is separated is transported to the first chamber again through the conducting pipe, and by setting the primary dehumidification unit and the secondary dehumidification unit, it is ensured that the gas in the first chamber can be fully dried.

[0018] Furthermore, the first-level dehumidification unit is divided into a rotating ring and a sealing ring. The gas in the first chamber can directly enter between the rotating ring and the cone tube. By limiting the outer contour of the rotating ring and the inner contour of the sealing ring, an auxiliary chamber can be formed between the rotating ring and the sealing ring. When the rotating ring rotates eccentrically in the sealing ring, the volume of the same auxiliary chamber will change. When one of the auxiliary chambers is in a low-pressure state, the gas between the rotating ring and the cone tube enters the auxiliary chamber in the low-pressure state; in the same auxiliary chamber, when the volume decreases, the air pressure in the auxiliary chamber increases, and the saturated vapor pressure of the gas in the auxiliary chamber increases. When the volume increases, the air pressure in the auxiliary chamber decreases, and the saturated vapor pressure of the gas in the auxiliary chamber decreases. In addition, during the rotation of the rotating ring, the gas in the auxiliary chamber is subjected to a certain centrifugal force. When the air pressure in the auxiliary chamber decreases, the water vapor in the gas will condense into small water droplets, and the small water droplets adhere to the side wall of the sealing ring, thereby achieving preliminary dehumidification of the gas in the first chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 A diagram showing a state where a moisture-proof ventilation structure of an electric control cabinet provided by an embodiment of the present invention is installed on the electric control cabinet;

[0021] Figure 2 A side view of a moisture-proof ventilation structure of an electric control cabinet provided by an embodiment of the present invention installed on the electric control cabinet;

[0022] Figure 3 for Figure 2 Cross-sectional view in the AA direction;

[0023] Figure 4 for Figure 2 Cross-sectional view in the middle BB direction;

[0024] Figure 5 A schematic structural diagram of a primary dehumidification unit and a secondary dehumidification unit in a moisture-proof ventilation structure of an electric control cabinet provided by an embodiment of the present invention;

[0025] Figure 6 A top view of a primary dehumidification unit and a secondary dehumidification unit in a moisture-proof ventilation structure of an electric control cabinet provided by an embodiment of the present invention;

[0026] Figure 7 for Figure 6 Cross-sectional view in CC direction;

[0027] Figure 8 for Figure 6 Cross-sectional view in the middle DD direction;

[0028] Figure 9 A side view of a primary dehumidification unit and a secondary dehumidification unit in a moisture-proof ventilation structure of an electric control cabinet provided by an embodiment of the present invention;

[0029] Figure 10 for Figure 9 Cross-sectional view in the EE direction;

[0030] Figure 11 A schematic diagram of a partial structure of a primary dehumidification unit in a moisture-proof ventilation structure of an electric control cabinet provided by an embodiment of the present invention;

[0031] Figure 12A schematic structural diagram of a secondary dehumidification unit in a moisture-proof ventilation structure of an electric control cabinet provided by an embodiment of the present invention;

[0032] Figure 13 A schematic structural diagram of a sealing ring in a moisture-proof ventilation structure of an electric control cabinet provided by an embodiment of the present invention.

[0033] In the figure: 110, electric control cabinet; 111, partition; 112, first chamber; 113, second chamber; 120, tapered tube; 130, support rod; 140, conducting tube; 150, second air hole; 160, rotating ring; 161, apex; 162, curved side wall; 170, sealing ring; 171, groove; 180, blocking plate; 190, air inlet pipe; 210, limiting hole; 220, auxiliary chamber; 230, air guide hole; 240, first air hole; 250, conduit; 260, stirring plate; 270, driving cylinder; 280, traction rod; 290, limiting block. DETAILED DESCRIPTION

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0035] The serial numbers assigned to components herein, such as "first," "second," etc., are used solely to distinguish the objects being described and do not convey any sequential or technical meaning. References to "connection" and "coupling" herein, unless otherwise specified, include both direct and indirect connections (couplings). In the description of the present invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like, indicating positions or relationships, are based on those shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They are not intended to indicate or imply that the device or element referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limiting the present invention.

[0036] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," and "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "below," "below," and "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0037] like Figures 1 to 13 As shown, an embodiment of the present invention provides a moisture-proof ventilation structure for an electric control cabinet, which includes a primary dehumidification unit and a secondary dehumidification unit.

[0038] The interior of the electrical control cabinet 110 is hollow and roughly rectangular in shape. The cabinet 110 is vertically arranged. A horizontal partition 111 is provided inside the cabinet 110, dividing the interior of the cabinet 110 into a first chamber 112 and a second chamber 113, which are isolated from each other. The first chamber 112 is located above the second chamber 113 and is used to install electronic control components. The sidewalls of the cabinet 110 are provided with an access port connecting the external environment to the first chamber 112. The cabinet 110 is equipped with a door panel to block the access port, allowing personnel to install electronic control components in the first chamber 112 through the access port.

[0039] The first-level dehumidification unit is used to perform preliminary dehumidification on the gas in the first chamber 112. The second-level dehumidification unit is used to dehumidify the gas after dehumidification by the first-level dehumidification unit. The second-level dehumidification unit includes a conical tube 120, which is vertically arranged. The conical tube 120 has a first end and a second end. The diameter of the first end is larger than the diameter of the second end, and the first end is above the second end. The first end passes through the partition 111 so that the first end extends into the first chamber 112. A bracket is provided in the first chamber 112, and the bracket is fixedly connected to the first end of the conical tube 120. In this embodiment, the bracket is a support rod 130, which is horizontally arranged. The support rod 130 can block the opening of the first end. A conducting tube 140 is coaxially disposed within the conical tube 120 and fixedly connected to the support rod 130. The upper end of the conducting tube 140 is located above the first end, extending through the support rod 130. The outer diameter of the conducting tube 140 is smaller than the inner diameter of the first end, creating a gap between the conducting tube 140 and the conical tube 120. Furthermore, a second air hole 150 is provided on the sidewall of the conical tube 120, arranged tangentially to the inner wall of the conical tube 120. Gas dehumidified by the primary dehumidification unit enters the conical tube 120 through the second air hole 150. Once inside, the gas spirals along the inner wall of the conical tube 120, subjecting it to centrifugal force. This separates water vapor from the gas and deposits it on the inner wall of the conical tube 120. The separated gas then returns to the first chamber 112 through the conducting tube 140, thereby drying the first chamber 112.

[0040] The moisture-proof ventilation structure of an electric control cabinet of the present invention is configured to divide the interior of the electric control cabinet 110 into a first chamber 112 and a second chamber 113 which are isolated from each other by arranging a partition 111 inside the electric control cabinet 110, and to install the electric control element in the first chamber 112, wherein the first-level dehumidification unit performs preliminary dehumidification on the gas in the first chamber 112. After the first-level dehumidification unit dehumidifies the gas, the first-level dehumidification unit transports the gas to the interior of the conical tube 120. By limiting the way in which the gas enters the conical tube 120, it is ensured that the gas entering the conical tube 120 can flow in a spiral, and the water vapor in the gas can adhere to the side wall of the conical tube 120 under the action of centrifugal force, thereby separating the water vapor in the gas. The gas after the water vapor is separated is transported to the first chamber 112 again through the conducting pipe 140. By arranging the first-level dehumidification unit and the second-level dehumidification unit, it is ensured that the gas in the first chamber 112 can be fully dried.

[0041] In one embodiment, the primary dehumidification unit includes a rotating ring 160 and a sealing ring 170. The sealing ring 170 is coaxially mounted on the outside of the conical tube 120. The upper end of the sealing ring 170 is fixedly connected to the lower end surface of the partition 111. The lower end of the sealing ring 170 is provided with a sealing plate 180. The inner sidewall of the sealing ring 170, the outer sidewall of the conical tube 120, the upper end surface of the sealing plate 180, and the lower end surface of the partition 111 form a closed chamber. The rotating ring 160 is rotatably mounted between the sealing ring 170 and the conical tube 120, with the upper end of the rotating ring 160 tightly abutting the lower end surface of the partition 111, and the lower end surface of the rotating ring 160 tightly abutting the sealing plate 180. The rotating ring 160 is sleeved on the outside of the conical tube 120. The inner diameter of the rotating ring 160 is larger than the outer diameter of the conical tube 120. An air intake pipe 190 is fixedly arranged on the inner wall of the rotating ring 160. The inner diameter of the air intake pipe 190 is the same as the inner diameter of the rotating ring 160. The air intake pipe 190 passes through the partition 111. Furthermore, a limiting hole 210 is provided on the partition 111. The diameter of the limiting hole 210 is larger than the outer diameter of the air intake pipe 190, so that the gas inside the first chamber 112 can directly enter between the rotating ring 160 and the conical tube 120. The cross-section of rotating ring 160 is roughly the shape of a Reuleaux triangle, while the internal contour of sealing ring 170 is roughly elliptical. Rotating ring 160 has three vertices 161 and three curved sidewalls 162. The three vertices 161 simultaneously abut the inner sidewall of sealing ring 170. An auxiliary chamber 220 is formed between each curved sidewall 162, the inner sidewall of sealing ring 170, the upper end surface of blocking plate 180, and the lower end surface of partition 111. A drive source for rotating ring 160 is provided on partition 111. During rotation, the axis of rotating ring 160 and the axis of sealing ring 170 are always coaxial, forming a structure similar to a rotary engine between rotating ring 160 and sealing ring 170.Furthermore, during the rotation of the rotating ring 160, the volume of each auxiliary chamber 220 can change. When the volume in the auxiliary chamber 220 changes, the gas pressure in the auxiliary chamber 220 also changes. Furthermore, taking one of the auxiliary chambers 220 as an example, when its volume gradually increases, the gas between the rotating ring 160 and the cone 120 gradually enters the auxiliary chamber 220. When the volume of the auxiliary chamber 220 gradually decreases, the gas pressure in the auxiliary chamber 220 increases. As the rotating ring 160 further rotates, the volume of the auxiliary chamber 220 gradually decreases again. As the air pressure in the auxiliary chamber 220 gradually increases, the gas pressure in the auxiliary chamber 220 decreases. As the gas pressure changes, the saturated vapor pressure of the gas also changes. Specifically, the greater the gas pressure, the greater the saturated vapor pressure of the gas, and the lower the gas pressure, the lower the saturated vapor pressure of the gas. As the air pressure in the auxiliary chamber 220 decreases, the water vapor in the gas condenses into small water droplets. During the rotation of the rotating ring 160, the gas in the auxiliary chamber 220 is subjected to centrifugal force, and the condensed small water droplets in the auxiliary chamber 220 adhere to the inner wall of the sealing ring 170, thereby achieving preliminary dehumidification of the gas in the first chamber 112. Furthermore, when the rotating ring 160 rotates 240 degrees, the gas in the auxiliary chamber 220 begins to be transported into the interior of the conical tube 120.

[0042] In one embodiment, the rotating ring 160 has three arcuate side walls 162, and each arcuate side wall 162 is provided with a plurality of air guide holes 230 that pass through the two end surfaces of the arcuate side wall 162. The plurality of air guide holes 230 are irregularly arranged on the arcuate side wall 162, and a one-way valve is provided in each air guide hole 230. By limiting the conduction direction of the one-way valve, when the auxiliary chamber 220 is in a negative pressure state, the gas between the rotating ring 160 and the cone tube 120 smoothly passes through the one-way valve under the action of the pressure difference and enters the auxiliary chamber 220. When the air pressure inside the auxiliary chamber 220 is in a positive pressure state, the gas in the auxiliary chamber 220 is prevented from returning to the first chamber 112 again through the one-way valve. In the initial state, the auxiliary chamber 220 is in an atmospheric pressure state.

[0043] In one embodiment, the sidewall of the sealing ring 170 is provided with a first air hole 240 that communicates with the inside and outside. In the initial state, one of the auxiliary chambers 220 corresponds to the first air hole 240. As the rotating ring 160 rotates, the volume of the auxiliary chamber 220 gradually decreases, and along the rotation direction of the rotating ring 160, an auxiliary chamber 220 adjacent to and located in front of the auxiliary chamber 220 begins to take in air. As the rotating ring 160 rotates 240 degrees, the auxiliary chamber 220 containing the gas from the first chamber 112 will correspond to the first air hole 240. As the rotating ring 160 continues to rotate, the auxiliary chamber 220 containing the gas from the first chamber 112 communicates with the first air hole 240. At this time, the gas from the first chamber 112 is discharged from the sealing ring 170 through the first air hole 240. The first air hole 240 and the second air hole 150 are connected by a conduit 250, so that the gas discharged from the sealing ring 170 is transported to the interior of the conical tube 120 through the conduit 250.

[0044] In one embodiment, a groove 171 is provided on the inner side wall of the sealing ring 170. The groove 171 is provided in the vertical direction. During the rotation of the rotating ring 160, the vertex 161 of the rotating ring 160 can enter the groove 171. When the vertex 161 of the rotating ring 160 enters the groove 171, two adjacent auxiliary chambers 220 are in a connected state. Furthermore, in the initial state, each vertex 161 of the rotating ring 160 is not in the groove 171. When the rotating ring 160 starts to rotate, the gas between the rotating ring 160 and the cone 120 gradually enters an auxiliary chamber 220. When the air intake in the auxiliary chamber 220 does not stop, the vertex 161 located on the front side along the rotation direction of the rotating ring 160 of the two corresponding vertices 161 of the auxiliary chamber 220 enters the groove 171. As the rotating ring 160 continues to rotate, the vertex 161 located on the front side passes over the groove 171. After that, the auxiliary chamber 220 no longer takes in air, and the air pressure in the auxiliary chamber 220 gradually increases. As the rotating ring 160 rotates further, in the rotation direction of the rotating ring 160, an auxiliary chamber 220 adjacent to the rear side of the auxiliary chamber 220 begins to take in air. At this time, the vertex 161 on the rear side enters the groove 171. At this time, the gas in the auxiliary chamber 220 in a positive pressure state enters the auxiliary chamber 220 that is taking in air through the groove 171, so that the amount of gas in the auxiliary chamber 220 in a positive pressure state is reduced. As the rotating ring 160 rotates further, when the rotating ring 160 rotates 240 degrees, the air pressure in the auxiliary chamber 220 is in a negative pressure state. At this time, the gas in the first chamber 112 enters the auxiliary chamber 220 again. As the rotating ring 160 continues to rotate, the gas in the auxiliary chamber 220 is transported to the interior of the tapered tube 120 through the first air hole 240 and the conduit 250. When the gas enters the interior of the tapered tube 120, the pressure in the auxiliary chamber 220 first becomes positive pressure and then becomes negative pressure. The pressure change allows water vapor in the gas to be smoothly precipitated.

[0045] In one embodiment, each curved side wall 162 is provided with a mounting groove with an opening away from the axis of the rotating ring 160, and a plurality of stirring plates 260 are provided in the mounting groove. During the rotation of the rotating ring 160, the stirring plates 260 stir the gas in the auxiliary chamber 220, and when the air pressure in the auxiliary chamber 220 changes, it is ensured that the gas in the auxiliary chamber 220 is subjected to centrifugal force.

[0046] In one embodiment, a drive source is provided on the partition 111. The drive source is used to drive the rotating ring 160 to rotate between the sealing ring 170 and the conical tube 120. During the process of driving the rotating ring 160, the driving source causes the rotating ring 160 to rotate eccentrically about the axis of the conical tube 120, thereby achieving alternating changes in the volume of the auxiliary chamber 220. The drive source includes a drive cylinder 270 and a traction rod 280. The drive cylinder 270 is fixed to the partition 111. The power output shaft of the drive cylinder 270 is arranged in the radial direction of the conical tube 120. One end of the traction rod 280 is connected to the drive cylinder 270. The other end of the traction rod 280 is fixedly provided with a connecting ring. The connecting ring is coaxially connected to the intake pipe 190. When the drive cylinder 270 is activated, the traction rod 280 and the connecting ring drive the rotating ring 160 to undergo eccentric motion about the axis of the conical tube 120.

[0047] In one embodiment, the driving source also includes a limit block 290, and a limit groove extending in the radial direction of the conical tube 120 is provided on the partition 111. The limit block 290 is slidably set in the limit groove. The limit block 290 is fixedly connected to the power output shaft of the driving cylinder 270. The limit block 290 is ball-hinged with one end of the traction rod 280. When the driving cylinder 270 is started, the limit block 290 slides back and forth along the limit groove, and the traction rod 280 pulls the intake pipe 190 and the rotating ring 160 to move eccentrically around the axis of the conical tube 120 synchronously.

[0048] In one embodiment, a water collecting trough is provided in the second chamber 113, the water collecting trough opening is upward, and the water collecting trough is provided below the second end. The water droplets discharged from the second end of the conical tube 120 can drip into the water collecting trough, thereby centrally treating the water droplets.

[0049] Furthermore, the sealing plate 180 is provided with a drain outlet running through from top to bottom, and a sealing plug is provided at the drain outlet, which can block the drain outlet. In the initial state, the sealing plug is in a state of blocking the drain outlet. When the staff inspects the electrical control components in the first chamber 112, the staff will unblock the drain outlet with the sealing plug, so that the water droplets on the side wall of the sealing ring 170 are discharged from the inside of the sealing ring 170 through the drain outlet.

[0050] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. 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.

Claims

1. A moisture-proof ventilation structure for an electric control cabinet, characterized in that: It includes a primary dehumidification unit and a secondary dehumidification unit; The interior of the electric control cabinet is hollow and has a partition plate inside the electric control cabinet. The partition plate is used to separate the interior of the electric control cabinet into a first chamber and a second chamber that are isolated from each other. The first chamber is used to store electric control components. The primary dehumidification unit is used to perform preliminary dehumidification on the gas in the first chamber, and the secondary dehumidification unit is used to dehumidify the gas dehumidified by the primary dehumidification unit; the secondary dehumidification unit includes a conical tube, which is arranged in the second chamber, and has a first end and a second end. The diameter of the first end is larger than the diameter of the second end. The first end passes through the partition, and a bracket is provided on the first end. The bracket is arranged in the first chamber, and the bracket is used to seal and support the first end; a conducting tube is coaxially arranged inside the conical tube, and the outer diameter of the conducting tube is smaller than the inner diameter of the first end. The conducting tube passes through the bracket, and the gas dehumidified by the primary dehumidification unit can enter the interior of the conical tube along the tangential direction of the conical tube; The first-stage dehumidification unit includes a rotating ring and a sealing ring. The sealing ring is coaxially sleeved on the outside of the cone tube and is fixedly connected to the partition. The rotating ring is rotatably arranged between the sealing ring and the conical tube. The upper end of the rotating ring passes through the partition, and the gas in the first chamber can enter between the rotating ring and the conical tube. The cross section of the rotating ring is slightly Reuleaux triangle, and the internal contour of the sealing ring is slightly elliptical. When the rotating ring rotates inside the sealing ring, it is always in an eccentric state. The rotating ring has three arc-shaped side walls and three vertices. Each arc-shaped side wall is provided with a plurality of air guide holes, and each air guide hole is provided with a one-way valve. An auxiliary chamber is formed between each arc-shaped side wall and the inner side wall of the sealing ring. When the air pressure in the auxiliary chamber is in a negative pressure state, the gas between the rotating ring and the cone tube enters the auxiliary chamber through the air guide holes. The side wall of the sealing ring is provided with a first air hole communicating with the inside and outside, through which the gas in the auxiliary chamber is discharged from the auxiliary chamber. The side wall of the cone tube is provided with a second air hole, which is arranged along the tangent direction of the cone tube. The first air hole and the second air hole are connected by a conduit. A groove is provided on the inner side wall of the sealing ring, and the groove is provided in the vertical direction. In the initial state, each vertex of the rotating ring is not in the groove. As the rotating ring rotates, when the vertex located on the rear side of the auxiliary chamber in the rotation direction of the rotating ring enters the groove, the gas in the auxiliary chamber in a positive pressure state enters the auxiliary chamber adjacent to the rear side of the auxiliary chamber through the groove and is currently taking in air.

2. The moisture-proof ventilation structure of an electric control cabinet according to claim 1, characterized in that: A driving source is provided on the partition plate, and the driving source is used to drive the rotating ring to rotate between the sealing ring and the cone tube.

3. The moisture-proof ventilation structure of an electric control cabinet according to claim 2, characterized in that: The driving source comprises a driving cylinder and a traction rod. The driving cylinder is fixedly arranged on the partition plate. One end of the traction rod is connected to the driving cylinder, and the other end of the traction rod is coaxially rotatably connected to the rotating ring.

4. The moisture-proof ventilation structure of an electric control cabinet according to claim 3, characterized in that: The driving source also includes a limit block, a limit groove along the radial direction of the cone tube is provided on the partition, the limit block is slidably set in the limit groove, the limit block is fixedly connected to the power output shaft of the driving cylinder, and the limit block is ball-hinged with one end of the traction rod.

5. The moisture-proof ventilation structure of an electric control cabinet according to claim 1, characterized in that: A water collecting tank is provided in the second chamber and is arranged below the second end.

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