CN112531479A

CN112531479A - Electric switch cabinet capable of dehumidifying

Info

Publication number: CN112531479A
Application number: CN202011433791.9A
Authority: CN
Inventors: 冯林英
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-12-10
Filing date: 2020-12-10
Publication date: 2021-03-19

Abstract

The invention provides a dehumidifying electrical switch cabinet, which comprises a cabinet body, a semiconductor refrigerating sheet, a fan, a partition plate, a waterproof breathable film, a shell and a controller, wherein the partition plate divides an inner cavity of the cabinet body into a first cavity and a second cavity, the semiconductor refrigerating sheet is fixedly arranged on the side wall of the second cavity far away from the first cavity, a cold end is positioned in the second cavity, the top and the bottom of the partition plate are respectively provided with an air outlet and an air inlet, the fan is fixedly arranged in the air outlet, the peripheral edge of the waterproof breathable film is hermetically connected with the side wall of the air inlet, the bottom of the side wall of the second cavity is provided with a drain hole, one end of the shell is in contact with the cold end of the semiconductor refrigerating sheet, the other end of the shell penetrates through the partition plate and is positioned in the first cavity, heat-conducting silicone grease is. The invention can effectively perform dehumidification and damp-proof operation on the air in the switch cabinet, ensures the normal work of the electrical elements and has high dehumidification and damp-proof efficiency.

Description

Electric switch cabinet capable of dehumidifying

Technical Field

The invention relates to the technical field of switch cabinets, in particular to a dehumidifying electrical switch cabinet.

Background

The switch cabinet is an electrical device, the external line of the switch cabinet firstly enters a main control switch in the cabinet and then enters a branch control switch, and each branch is arranged according to the requirement. The electrical switch cabinet mainly functions to open, close, control and protect electric equipment in the process of power generation, power transmission, power distribution and electric energy conversion of an electric power system, and the internal components of the electrical switch cabinet mainly comprise a circuit breaker, an isolating switch, a load switch, an operating mechanism, a mutual inductor, various protection devices and the like. In order to effectively prevent potential safety hazards such as ageing of internal equipment of the switch cabinet, short circuit, reduction of insulation strength, secondary terminal breakdown, material mildew and corrosion of a steel structural part, safe operation of a power grid is guaranteed, and the switch cabinet is required to be subjected to damp-proof dehumidification operation generally.

One method for performing moisture-proof and dehumidification operation on the switch cabinet is to mount a semiconductor refrigeration piece inside the switch cabinet, and to enable the cold end of the semiconductor refrigeration piece to be located in the inner cavity of the switch cabinet, so that water vapor in air inside the switch cabinet is in contact with the cold end of the semiconductor refrigeration piece to be condensed, is converted into liquid, and is finally discharged out of the switch cabinet.

Although the method can carry out moisture-proof and dehumidification operation on the switch cabinet, water drops formed by condensation at the cold end of the semiconductor refrigeration sheet still partially evaporate into water vapor to return to the interior of the switch cabinet, and the moisture-proof and dehumidification efficiency is to be improved.

Disclosure of Invention

Based on this, in order to solve the problem that the existing switch cabinet carries out damp-proof dehumidification operation through a semiconductor, water drops formed by condensation at the cold end of a semiconductor refrigeration sheet still partially evaporate into water vapor and return to the interior of the switch cabinet, the invention provides a dehumidification electric switch cabinet, which has the following specific technical scheme:

a dehumidifying electrical switch cabinet comprises a cabinet body, a semiconductor refrigeration piece, a fan, a partition plate, a waterproof breathable film, a shell and a controller, wherein the partition plate is fixedly installed in an inner cavity of the cabinet body and divides the inner cavity of the cabinet body into a first cavity and a second cavity, the semiconductor refrigeration piece is fixedly installed on the side wall, away from the first cavity, of the second cavity, the cold end of the semiconductor refrigeration piece is located in the second cavity, the hot end of the semiconductor refrigeration piece is located on the outer side of the cabinet body, an air outlet and an air inlet are respectively formed in the top and the bottom of the partition plate, the fan is fixedly installed in the air outlet, the peripheral edge of the waterproof breathable film is hermetically connected with the side wall of the air inlet, a drain hole is formed in the bottom of the side wall of the partition plate, and one end of the shell is in contact with the cold end of the semiconductor refrigeration piece, the other end of the shell penetrates through the partition plate and is located in the first cavity, heat-conducting silicone grease is filled in an inner cavity of the shell, and the controller is fixedly installed at the other end of the shell.

Preferably, the electric switch cabinet that can dehumidify still includes cabinet door and first pivot, the opening one side of the cabinet body is equipped with the inside outstanding protruding border, protruding border is equipped with the fluting, the cabinet door pass through first pivot with the fluting is rotated and is connected.

Preferably, the electrical switch cabinet capable of dehumidifying further comprises a second rotating shaft, a nut column, a piston, a first spiral spring, a push rod and a spring lock, wherein a first inner cavity and a second inner cavity are arranged in the protruding edge, the spring lock is installed in the side wall of the first inner cavity far away from the cabinet door, the spring lock comprises an inner lock cylinder, one end of the second rotating shaft is fixedly connected with the inner lock cylinder, the other end of the second rotating shaft extends into the first inner cavity and is in threaded connection with the nut column, the piston is fixedly connected with one end of the nut column far away from the second rotating shaft, the piston is in sliding sealing connection with the inner wall of the first inner cavity, the first inner cavity is communicated with the second inner cavity through a first through hole, a sealed chamber is formed among the piston, the first inner cavity and the push rod, and liquid is filled in the sealed chamber, one end of the first spiral spring is fixedly connected with the side wall of the second inner cavity, the other end of the first spiral spring is fixedly connected with one end of the push rod, one end of the push rod is connected with the inner wall of the first through hole in a sliding and sealing mode, one end of the first rotating shaft extends into the second inner cavity and is provided with a clamping groove matched with the other end of the push rod.

Preferably, a second through hole is further formed in the protruding edge, one end of the second through hole is communicated with the open groove, the other end of the second through hole is communicated with the side wall of the first through hole, and fusible alloy is filled in the second through hole.

Preferably, the electrical switch cabinet capable of dehumidifying further comprises a drain pipe and a switch valve, wherein one end of the drain pipe is communicated with the drain hole, the other end of the drain pipe is located on the outer side of the cabinet body, the drain pipe is communicated with the drain hole, and the switch valve is fixedly installed in the drain pipe.

Preferably, the dehumidified electrical switchgear further comprises a humidity sensor fixedly mounted in the first chamber and electrically connected with the controller.

Preferably, the liquid is a lubricating grease or a heat conductive silicone grease.

Preferably, the housing is made of an aluminum alloy material.

Preferably, the partition is made of insulating ceramic.

The air outlet and the air inlet are respectively arranged at the top and the bottom of the partition plate, and when the fan rotates, air inside the cabinet body flows in the first cavity and the second cavity in a circulating mode. The cold end of the semiconductor refrigeration sheet is positioned in the second chamber, and the air with water vapor flowing out of the first chamber flows through the cold end of the semiconductor refrigeration sheet, is condensed into liquid and flows into the bottom of the second chamber, and then flows out of the switch cabinet through the drain hole. That is to say, through with semiconductor refrigeration piece fixed mounting keep away from first in the second cavity on the lateral wall of first cavity, just the cold junction of semiconductor refrigeration piece is located in the second cavity, can make the inside steam condensation of cubical switchboard become liquid, carry out dampproofing dehumidification operation to the cubical switchboard.

When the fan rotates and makes the air circulation in first cavity and the second cavity flow, the waterproof ventilated membrane that sets up in the air intake can avoid flowing into the liquid conversion of second cavity bottom and steam then flow into first cavity again, so can solve current cubical switchboard and carry out dampproofing dehumidification operation through the semiconductor, the drop of water that forms at semiconductor refrigeration piece cold junction condensation still has partial evaporation to become steam and gets back to the inside problem of cubical switchboard again, guarantees electric elements's normal work.

Above-mentioned electrical switchgear can dehumidify dampproofing operation to cubical switchboard inside air effectively, guarantees electrical component's normal work, has very high dehumidification dampproofing efficiency.

Drawings

The invention will be further understood from the following description in conjunction with the accompanying drawings. The components in the figures are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the embodiments. Like reference numerals designate corresponding parts throughout the different views.

FIG. 1 is a schematic diagram of an electrical switch cabinet with dehumidification according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of an overall structure of a dehumidified electrical switchgear in an embodiment of the present invention;

FIG. 3 is an enlarged view of a portion of FIG. 2 at A;

FIG. 4 is a schematic diagram illustrating a portion of a dehumidified electrical switchgear in accordance with one embodiment of the present invention;

FIG. 5 is a schematic diagram of a second embodiment of a dehumidified electrical switchgear;

FIG. 6 is a schematic diagram of a portion of a dehumidified electrical switchgear in accordance with an embodiment of the present invention;

description of reference numerals:

1. a cabinet body; 2. a semiconductor refrigeration sheet; 3. a fan; 4. a partition plate; 5. a waterproof breathable film; 6. a first chamber; 7. a second chamber; 8. an air outlet; 9. an air inlet; 10. a drain hole; 11. a cabinet door; 12. a first rotating shaft; 13. a second rotating shaft; 14. a nut post; 15. a piston; 16. a first coil spring; 17. a push rod; 18. a cylinder lock; 19. a first lumen; 20. a second lumen; 21. a first through hole; 22. a fusible alloy; 23. a temperature sensor; 24. an inner lock cylinder; 25. a second through hole; 26. a drain pipe; 27. an on-off valve; 28. a controller; 29. a humidity sensor; 30. a raised edge; 31. grooving; 32. a first round bar; 33. a top rod; 34. a third coil spring; 35. a rubber block; 36. a third lumen; 37. a groove; 38. a first stopper; 39. a second round bar; 40. a second limiting block; 41. a housing.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to embodiments thereof. It should be understood that the detailed description and specific examples, while indicating the scope of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The terms "first" and "second" used herein do not denote any particular order or quantity, but rather are used to distinguish one element from another.

A dehumidifying electrical switch cabinet comprises a cabinet body 1, a semiconductor refrigeration piece 2, a fan 3, a partition plate 4, a waterproof breathable film 5, a shell 41 and a controller 28, wherein the partition plate 4 is fixedly installed in an inner cavity of the cabinet body 1 and divides the inner cavity of the cabinet body 1 into a first cavity 6 and a second cavity 7, the semiconductor refrigeration piece 2 is fixedly installed on a side wall of the second cavity 7 far away from the first cavity 6, a cold end of the semiconductor refrigeration piece 2 is located in the second cavity 7, a hot end of the semiconductor refrigeration piece 2 is located on the outer side of the cabinet body 1, an air outlet 8 and an air inlet 9 are respectively formed in the top and the bottom of the partition plate 4, the fan 3 is fixedly installed in the air outlet 8, the peripheral edge of the waterproof breathable film 5 is hermetically connected with the side wall of the air inlet 9, a drain hole 10 is formed right at the bottom of the side wall of the partition plate 4 by the second cavity 7, one end of shell 41 with the cold junction contact of semiconductor refrigeration piece 2, the other end of shell 41 passes baffle 4 and is located in first cavity 6, it has heat conduction silicone grease to fill in the inner chamber of shell 41, controller 28 fixed mounting be in on the other end of shell 41.

The air outlet 8 and the air inlet 9 are respectively arranged at the top and the bottom of the partition plate 4, and when the fan 3 rotates, air inside the cabinet body 1 flows in the first chamber 6 and the second chamber 7 in a circulating manner. The cold end of the semiconductor refrigerating sheet 2 is positioned in the second chamber 7, and the air with water vapor flowing out of the first chamber 6 flows through the cold end of the semiconductor refrigerating sheet 2, is condensed into liquid and flows into the bottom of the second chamber 7, and then flows out of the switch cabinet through the drain hole 10. That is to say, through with semiconductor refrigeration piece 2 fixed mounting keep away from first on the lateral wall of first cavity 6 is in second cavity 7, just the cold junction of semiconductor refrigeration piece 2 is located in second cavity 7 can make the inside steam condensation of cubical switchboard become liquid, carries out dampproofing dehumidification operation to the cubical switchboard. When fan 3 rotates and makes the air circulation in first cavity 6 and the second cavity 7 flow, the waterproof ventilated membrane 5 that sets up in air intake 9 can avoid flowing into the liquid of second cavity 7 bottom and turn into steam then flow into first cavity 6 again, so can solve current cubical switchboard and carry out dampproofing dehumidification operation through the semiconductor, the drop of water that forms at the condensation of 2 cold junctions of semiconductor refrigeration pieces still has partial evaporation to become steam and get back to the inside problem of cubical switchboard again, guarantees electric elements's normal work. Above-mentioned electrical switchgear can dehumidify dampproofing operation to cubical switchboard inside air effectively, guarantees electrical component's normal work, has very high dehumidification dampproofing efficiency.

In one embodiment, the other end of the housing 41 passes through the partition plate 4 and is located in the first chamber 6, the inner cavity of the housing 41 is filled with heat conductive silicone grease, the controller 28 is fixedly mounted on the other end of the housing 41, and the outer side wall of the housing 41 is hermetically connected with the partition plate 4. The liquid is lubricating grease or heat-conducting silicone grease, and preferably the heat-conducting silicone grease. Through setting up shell 41 can utilize the low temperature of semiconductor refrigeration piece 2 during operation cold junction, dispel the heat the cooling to controller 28, avoids appearing controller 28 operating temperature too high and the problem of performance reduction, can guarantee controller 28's normal steady operation. In addition, by means of the housing 41, it is possible to reduce the operating temperature of the controller 28 while avoiding the re-entry of moisture into the first chamber 6.

In one embodiment, as shown in fig. 1, the side wall of the housing 41 contacting the cold end of the semiconductor chilling plate 2 and the side wall contacting the controller 28 are made of aluminum alloy, that is, the side wall of the housing 41 near the cold end of the semiconductor chilling plate 2 and the side wall far from the cold end of the semiconductor chilling plate 2 are made of aluminum alloy, and the rest of the side walls of the housing 41 are made of insulating ceramic. Thus, through the shell 41 not only can be well right the controller 28 carries out the cooling operation of dispelling the heat, can also avoid appearing semiconductor refrigeration piece 2 cold junction temperature and transmitting the baffle 4 and be located the side of first cavity 6 and lead to the problem that baffle 4 is located the condensation of first cavity 6 side.

In one embodiment, as shown in fig. 2 and 3, the electrical switch cabinet further includes a cabinet door 11, a first rotating shaft 12, a second rotating shaft 13, a nut column 14, a piston 15, a first spiral spring 16, a push rod 17, and a pin tumbler lock 18, an inwardly protruding raised edge 30 is provided at one side of the opening of the cabinet body 1, a slot 31 is provided on the raised edge 30, and the cabinet door 11 is rotatably connected with the slot 31 through the first rotating shaft 12. The protruding edge 30 is provided with a first inner cavity 19 and a second inner cavity 20, the pin tumbler lock 18 is installed in the side wall of the first inner cavity 19 far away from the cabinet door 11, the pin tumbler lock 18 includes an inner lock cylinder, one end of the second rotating shaft 13 is fixedly connected with the inner lock cylinder, the other end of the second rotating shaft 13 extends into the first inner cavity 19 and is in threaded connection with the nut column 14, the piston 15 is fixedly connected with one end of the nut column 14 far away from the second rotating shaft 13, the piston 15 is in sliding sealed connection with the inner wall of the first inner cavity 19, the first inner cavity 19 is communicated with the second inner cavity 20 through a first through hole 21, a sealed cavity is formed among the piston 15, the first inner cavity 19 and the push rod 17, the sealed cavity is filled with a liquid, one end of the first spiral spring 16 is fixedly connected with the side wall of the first inner cavity 19 far away from the second inner cavity 20, the other end of the first spiral spring 16 is fixedly connected with one end of the push rod 17, one end of the push rod 17 is connected with the inner wall of the first through hole 21 in a sliding and sealing manner, and one end of the first rotating shaft 12 extends into the second inner cavity 20 and is provided with a clamping groove (not shown in the figure) matched with the other end of the push rod 17.

By filling the sealed chamber with liquid, it is ensured that the piston 15 slides smoothly along the side wall of the first inner chamber 19 and the push rod 17 along the inner wall of the first through hole 21. When the cabinet door 11 is closed, the cabinet door 11 is hermetically connected with the side wall of the opening edge of the cabinet body 1, so as to prevent moist air from flowing into the inner cavity of the switch cabinet through a gap between the cabinet door 11 and the cabinet body 1 to influence the performance of the electrical element.

One end of the second rotating shaft 13 is rotatably connected with the side wall of the first inner cavity 19 far away from the cabinet door 11 through the inner lock cylinder, the other end of the second rotating shaft 13 is in threaded connection with the nut column 14, and one end of the nut column 14 is fixedly connected with the piston 15, so that the second rotating shaft 13 can be driven to rotate by rotating the inner lock cylinder of the spring lock 18, and the piston 15 is driven to move back and forth along the side wall of the first inner cavity 19. And first coil spring 16 set up the lateral wall at first inner chamber 19 with between the one end of push rod 17, the one end of push rod 17 and the inner wall sliding seal of first through-hole 21 are connected, the one end of first pivot 12 be equipped with the other end assorted draw-in groove of push rod 17, it has liquid to fill in the sealed cavity, through drive piston 15 along the lateral wall round trip movement of first inner chamber 19, can make push rod 17 slide from top to bottom along the inner wall of first through-hole 21, and then make the other end card of push rod 17 go into among the draw-in groove or follow break away from in the draw-in groove to prescribe a limit to the position of first pivot 12 and cabinet door 11, make things convenient for the technical staff to open cabinet door 11, clean and maintain the electric elements in the electric switch cabinet.

When the other end of the push rod 17 is engaged in the engaging groove, the first helical spring 16 is under tension, and its elastic force can make the push rod 17 keep a tendency to move toward the first inner cavity 19. When the first rotating shaft 12 is rotated to drive the nut post 14 and the piston 15 to move away from the first spiral spring 16, the push rod 17 moves towards the first inner cavity 19 under the elastic force of the first spiral spring 16, and the other end of the push rod 17 is disengaged from the clamping groove. At this moment, the cabinet door 11 is opened to a certain angle, and the first rotation is rotated again, the nut column 14 and the piston 15 are driven to move towards the direction close to the first spiral spring 16, the push rod 17 is driven to move towards the direction of the second inner cavity 20 through the liquid in the sealed cavity, and then the other end of the push rod 17 is clamped into the clamping groove, so that the position of the cabinet door 11 can be limited, and the technical personnel can clean or maintain and replace the internal electric elements of the electric switch cabinet conveniently.

When the other end of the push rod 17 is clamped into the clamping groove or separated from the clamping groove, the first spiral spring 16 is in a stretching state all the time. When the nut column 14 and the piston 15 are driven to move away from the first spiral spring 16 by rotating the first rotating shaft 12, the push rod 17 always keeps a trend of moving toward the first inner cavity 19 under the elastic force of the first spiral spring 16, so that the push rod 17 can be smoothly separated from the clamping groove to open the cabinet door 11.

In one embodiment, a second through hole 25 is further disposed in the protruding edge, one end of the second through hole 25 is communicated with the slot 31, the other end of the second through hole 25 is communicated with the side wall of the first through hole 21, and the second through hole 25 is filled with a fusible alloy 22. Specifically, the fusible alloy 22 is a low melting point alloy having a melting temperature of 45 to 85 degrees celsius, preferably 60 degrees celsius. That is, when the fusible alloy 22 is heated and melted, the first through hole 21 is communicated with the slot 31 through the second through hole 25, the liquid in the sealed chamber flows into the slot 31 through the first through hole 21 and the second through hole 25, and the push rod 17 is separated from the slot under the elastic force of the first spiral spring 16.

When the fan 3 rotates and circulates the air in the first chamber 6 and the second chamber 7, the temperature inside the switch cabinet may rise slowly due to the continuous operation of the semiconductor chilling plates 2, which may result in overhigh temperature of the switch cabinet or sound fire. Through being in pack fusible alloy 22 in the second through-hole 25, when electrical switchgear high temperature or conflagration breaing out, need not to rotate interior lock core 24 and first pivot 12 through the key, can dispel the heat or close the electrical switchgear cabinet door 11 that has opened in order to open electrical switchgear cabinet door 11, in order to reach the mesh that utilizes the isolated electrical switchgear inside air of cabinet door 11 and make the inside flame of the cabinet body 1 extinguish. In addition, when the electrical switch cabinet is used for a long time and the spring lock 18 is corroded and rusted, and the electrical switch cabinet cannot be opened by a key, the part, opposite to the groove 31, of the protruding edge 30 of the electrical switch cabinet can be heated, so that the fusible alloy 22 is melted, liquid in the sealed cavity flows into the groove 31 through the first through hole 21 and the second through hole 25, the push rod 17 is separated from the clamping groove, and the closed electrical switch cabinet is opened.

In one embodiment, the cabinet body 1 and the cabinet door 11 are made of aluminum alloy material, so that the fusible alloy 22 can be heated synchronously with the cabinet body 1.

In one embodiment, the slot has a regular hexagon shape. In this way, by rotating the first rotating shaft 12, the nut post 14 and the piston 15 are driven to move toward the first coil spring 16, and the other end of the push rod 17 is driven to be inserted into the slot, so that the cabinet door 11 can be limited to three angles of 0 degree, 60 degrees, 120 degrees and 180 degrees.

In one embodiment, as shown in fig. 1, the electrical switch cabinet further includes a drain pipe 26 and a switch valve 27, the drain pipe 26 is communicated with the drain hole 10, the switch valve 27 is fixedly installed in the drain pipe 26, and a peripheral edge of one end of the drain pipe 26 is hermetically connected with an inner side wall of the drain hole 10.

Opening said on-off valve 27 makes it possible to discharge the liquid that flows in and accumulates at the bottom of the second chamber 7 to the outside of the switchgear cabinet. If the semiconductor chilling plate 2 is stopped and the fan 3 is rotated while the on-off valve 27 is opened, a negative pressure is formed at the bottom of the second chamber 7. So, then can make the outside air of cubical switchboard inside to the cubical switchboard through the rotation of fan 3, realize the ventilation operation of cubical switchboard.

The interior of the switch cabinet can be sealed by closing the switch valve 27 and closing the cabinet door 11. So, not only can carry out dampproofing dehumidification operation to cubical switchboard inside, when guaranteeing that electrical component normally works, can also utilize gas insulation to seal electrical switchgear improves electrical switchgear's security performance.

In one of the embodiments, the partition 4 is made of insulating ceramic. The liquid is lubricating grease or heat-conducting silicone grease. As a preferred technical solution, the liquid is heat conductive silicone grease.

In order to allow the heat-conducting silicone grease in the sealed chamber to heat up synchronously with the inner side wall of the first chamber 6, in one embodiment, the switch cabinet further comprises an aluminum alloy heat-conducting grid. One end of the aluminum alloy heat-conducting grid penetrates through the side wall of the sealed chamber and is in sealing connection with the side wall of the sealed chamber, and the other end of the aluminum alloy heat-conducting grid surrounds the inner side wall of the first chamber 6. Therefore, the aluminum alloy heat-conducting grid can ensure that the heat-conducting silicone grease and the inner side wall of the first chamber 6 are synchronously heated, and further improve the sensitivity of the fusible alloy 22.

In one embodiment, the electrical switch cabinet further comprises a humidity sensor 29, the controller 28 is fixedly installed on the side surface of the partition plate 4 located on the second chamber 7 and in contact with the semiconductor chilling plate 2, the humidity sensor 29 is fixedly installed in the first chamber 6, and the controller 28 is electrically connected with the humidity sensor 29, the semiconductor chilling plate 2, the fan 3 and the switch valve 27 respectively. The humidity sensor 29 is used to detect the humidity value of the air in the first chamber 6 and feed the humidity value back to the controller 28. The controller 28 controls the fan 3 and the semiconductor chilling plate 2 to act according to the humidity value until the humidity value of the air in the first chamber 6 is smaller than a preset humidity value. Controller 28 can install at the cold junction of semiconductor refrigeration piece 2 through aluminum alloy support, and the cold junction with the help of semiconductor refrigeration piece 2 is right controller 28 dispels the heat and cools down, guarantees controller 28's normal work.

As shown in fig. 5, in one embodiment, the electrical switch cabinet further includes a first round rod 32, a top rod 33, a third spiral spring 34, and a rubber block 35, a third inner cavity 36 is further disposed in the protruding edge 30, a groove 37 is disposed on a side wall of the slot 31 away from the first rotating shaft 12, the rubber block 35 is slidably connected to the groove 37, one end of the third inner cavity 36 is communicated with the groove 37, one end of the top rod 33 extends into the third inner cavity 36 and is slidably and sealingly connected to a side wall of the third inner cavity 36, the other end of the top rod 33 is fixedly connected to one end of the third spiral spring 34, the other end of the third spiral spring 34 is fixedly connected to a side surface of the rubber block 35 away from the first rotating shaft 12, the first round rod 32 is slidably and sealingly connected to a side wall of the third inner cavity 36 close to the piston 15, just the one end of first round bar 32 stretches into in the third inner chamber 36, the other end of first round bar 32 stretches into in the first inner chamber 19 and be located piston 15 with between the interior lock core 24, the peripheral surface of the one end of first round bar 32 is equipped with first stopper 38, form the sealed cavity of second between third inner chamber 36, first round bar 32 and the ejector pin 33, it has lubricating grease to fill in the sealed cavity of second. Specifically, when the push rod 17 is inserted into the engaging groove and the piston 15 is separated from the first round bar 32, the first round bar 32 can be restored to the original position by the rubber block 35 and the third coil spring 34. The first stopper 38 is disposed to prevent one end of the first rod 32 from being located in the third cavity 36 all the time.

When the key is inserted into the inner cylinder 24 of the pin tumbler lock 18 to unlock the pin tumbler lock 18, the piston 15 can push the first round bar 32 to the third inner cavity 36 by rotating the inner cylinder 24 and the first rotating shaft 12 to make the nut column 14 and the piston 15 approach the second rotating shaft 13 under the action of the second rotating shaft 13. During the process that the first round rod 32 moves towards the third inner cavity 36, the first round rod 32 drives the ejector rod 33 and the second coil spring to approach the first rotating shaft 12 through the lubricating grease in the second sealed chamber, so that the rubber block 35 slides along the groove 37 and contacts with the first rotating shaft 12.

In the actual use process, rotate interior lock core 24 earlier for piston 15 moves towards interior lock core 24 direction, and push rod 17 breaks away from with the draw-in groove under the effect of first coil spring 16 elasticity, at this moment, can freely open cabinet door 11 to arbitrary angle. After the door 11 is opened, the inner lock cylinder 24 is rotated continuously in the same direction and the piston 15 is pressed against the first round bar 32, the rubber block 35 is close to the first rotating shaft 12 and the first rotating shaft 12 is tightly contacted together, and the position of the door 11 is further limited by the friction force between the rubber block 35 and the first rotating shaft 12.

As shown in fig. 5 and 6, in this embodiment, the electrical switch cabinet further includes a second round rod 39, the second round rod 39 is connected with the third inner cavity 36 in a sliding and sealing manner near the side wall of the piston 15, one end of the second round rod 39 extends into the third inner cavity 36, the other end of the second round rod 39 extends into the first inner cavity 19 and is located between the first round rod 32 and the inner lock cylinder 24, and a second limit block 40 is disposed on an outer peripheral surface of one end of the second round rod 39. A second round bar 39 is arranged between the first round bar 32 and the inner lock cylinder 24, and by continuing to rotate the inner lock cylinder 24 and pressing the piston 15 against the second round bar 39, the ejector rod 33 can be further pushed to the first rotating shaft 12 by using the lubricating grease in the second sealed chamber, so that the elastic force of the third spiral spring 34 and the friction force between the rubber block 35 and the first rotating shaft 12 are further increased.

In one embodiment, the first round bar 32 and the second round bar 39 are both arc-shaped at one end of the first inner cavity 19.

In one embodiment, the electrical switchgear further comprises a temperature sensor 23, the temperature sensor 23 being fixedly mounted within the first chamber 6 and electrically connected to the controller 28. The temperature sensor 23 is used for detecting the temperature value inside the cabinet 1 and feeding the temperature value back to the controller 28. When the temperature value in the cabinet body 1 is greater than the preset temperature value, the controller 28 controls the fan 3 to rotate, the switch valve 27 is opened, and the semiconductor refrigerating sheet 2 stops working. Therefore, the outside air of the switch cabinet can be pumped to the inside of the switch cabinet by controlling the rotation of the fan 3, so that the ventilation operation of the switch cabinet is realized, or the high-temperature gas inside the first cavity 6 is discharged to the outside of the cabinet body 1 through the drain hole 10 and the drain pipe 26, and then the heat dissipation and cooling operation is carried out on the switch cabinet until the air temperature inside the cabinet body 1 is lower than the preset temperature value.

When the fan 3 rotates and the switch valve 27 is opened, the ventilation operation or the heat dissipation and cooling operation of the switch cabinet depends on the material of the waterproof breathable film 5, the effective breathable area, the internal and external pressure difference and the rotating speed of the fan 3. That is to say, under the condition that waterproof ventilated membrane 5 material keeps unchangeable, realize the ventilation operation of cubical switchboard or the operation of cooling down of dispelling the heat and depend on the rotational speed of fan 3. By controlling the speed of the fan 3, it is possible to selectively pump air outside the switchgear cabinet to the inside of the switchgear cabinet or exhaust air inside the first chamber 6 to the outside of the cabinet body 1.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A dehumidifying electrical switch cabinet comprises a cabinet body and is characterized by further comprising a semiconductor refrigerating sheet, a fan, a partition plate, a waterproof breathable film, a shell and a controller, wherein the partition plate is fixedly installed in an inner cavity of the cabinet body and divides the inner cavity of the cabinet body into a first cavity and a second cavity, the semiconductor refrigerating sheet is fixedly installed on a side wall, away from the first cavity, of the second cavity, a cold end of the semiconductor refrigerating sheet is located in the second cavity, a hot end of the semiconductor refrigerating sheet is located on the outer side of the cabinet body, an air outlet and an air inlet are respectively formed in the top and the bottom of the partition plate, the fan is fixedly installed in the air outlet, the peripheral edge of the waterproof breathable film is in sealing connection with the side wall of the air inlet, and a drain hole is formed in the second cavity and is opposite to the bottom of the side wall of the partition plate, one end of the shell is in contact with the cold end of the semiconductor refrigeration piece, the other end of the shell penetrates through the partition plate and is located in the first cavity, heat-conducting silicone grease is filled in the inner cavity of the shell, and the controller is fixedly installed at the other end of the shell.

2. A dehumidified electrical switchgear cabinet as claimed in claim 1, further comprising a cabinet door and a first shaft, wherein the cabinet body has an inwardly protruding raised edge on an open side thereof, the raised edge has a slot, and the cabinet door is rotatably connected to the slot via the first shaft.

3. A dehumidified electrical switchgear cabinet as claimed in any preceding claim, further comprising a second shaft, a nut post, a piston, a first coil spring, a push rod, and a pin tumbler lock, wherein the protruding edge has a first inner cavity and a second inner cavity therein, the pin tumbler lock is installed in the side wall of the first inner cavity away from the cabinet door, the pin tumbler lock includes an inner lock cylinder, one end of the second shaft is fixedly connected to the inner lock cylinder, the other end of the second shaft extends into the first inner cavity and is in threaded connection with the nut post, the piston is fixedly connected to the end of the nut post away from the second shaft, the piston is in sliding sealed connection with the inner wall of the first inner cavity, the first inner cavity is communicated with the second inner cavity through a first through hole, and the piston, the first through hole, the second through hole, and the second through hole is communicated with the second inner cavity through a second through hole, First inner chamber form a sealed cavity between the push rod, it has liquid to fill in the sealed cavity, first coil spring's one end with first inner chamber is kept away from the lateral wall fixed connection of second inner chamber, first coil spring's the other end with the one end fixed connection of push rod, the one end of push rod with the inner wall sliding seal of first through-hole connects, the one end of first pivot stretch into in the second inner chamber and be equipped with the other end assorted draw-in groove of push rod.

4. A dehumidified electrical switchgear as claimed in any preceding claim, wherein a second through hole is provided in the raised edge, one end of the second through hole communicates with the slot, the other end of the second through hole communicates with the side wall of the first through hole, and the second through hole is filled with a fusible alloy.

5. A dehumidified electrical switchgear, according to any one of the preceding claims, further comprising a drain pipe, one end of which communicates with the drain hole, and the other end of which is located outside the cabinet body, and a switch valve, which is fixedly installed in the drain pipe.

6. A dehumidified electrical switchgear as claimed in any preceding claim, further comprising a humidity sensor fixedly mounted in the first chamber and electrically connected to the controller.

7. A dehumidified electrical switchgear as claimed in any preceding claim, wherein the liquid is a grease or a heat-conducting silicone grease.

8. A dehumidified electrical switchgear, as claimed in any preceding claim, wherein the enclosure is made of aluminium alloy material.

9. A dehumidified electrical switchgear, as claimed in any preceding claim, wherein the partition is made of insulating ceramic.