CN113745988B - Intelligent dehumidification device and dehumidification method for low-voltage switch cabinet - Google Patents
Intelligent dehumidification device and dehumidification method for low-voltage switch cabinet Download PDFInfo
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- CN113745988B CN113745988B CN202111291993.9A CN202111291993A CN113745988B CN 113745988 B CN113745988 B CN 113745988B CN 202111291993 A CN202111291993 A CN 202111291993A CN 113745988 B CN113745988 B CN 113745988B
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- switch cabinet
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- dehumidification
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/28—Casings; Parts thereof or accessories therefor dustproof, splashproof, drip-proof, waterproof or flameproof
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
- B01D53/261—Drying gases or vapours by adsorption
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D22/00—Control of humidity
- G05D22/02—Control of humidity characterised by the use of electric means
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- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
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- Automation & Control Theory (AREA)
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Abstract
The invention relates to an intelligent dehumidifying device of a low-voltage switch cabinet, which comprises a switch cabinet and a controller, wherein a dehumidifying box is arranged on the inner wall of the switch cabinet, and two transverse sliding strips, a driving gear and a stepping motor which are longitudinally arranged are transversely arranged in the dehumidifying box in a sliding manner; the end part of the transverse slide bar is provided with a transverse mounting plate, and the front side surface of the mounting plate is provided with flaky moisture absorption cotton; two oblique extrusion rubber rollers are rotatably arranged in the dehumidification box, a transverse piston cavity is formed at the inner bottom of the dehumidification box, a piston rod and a return spring are arranged in the piston cavity, a liquid receiving hopper is arranged on the upper surface of the piston cavity in a penetrating manner, and a push block and a lifting unit are arranged at the lower end of the mounting plate; the piston cavity is communicated with the outside through a plurality of capillary tubes; adopt two piece absorbent cottons to and the mode of slant extrusion play water, not only can promote the area that moisture absorption treatment can cover, guarantee moisture absorption effect can carry out intelligence hydrofuge according to setting for simultaneously, degree of automation is high.
Description
Technical Field
The invention relates to the technical field of low-voltage switch cabinets, in particular to an intelligent dehumidifying device and method for a low-voltage switch cabinet.
Background
The low-voltage switch cabinet is a common electrical appliance device, a good method is not provided for treating water vapor in the low-voltage switch cabinet at present, and the conventional adsorption method is limited by adsorption area through moisture absorption cotton or activated carbon and the like, so that the moisture absorption efficiency is low and the low-voltage switch cabinet is difficult to recycle.
Disclosure of Invention
The invention aims to solve the technical problem of providing an intelligent dehumidification device and a dehumidification method for a low-voltage switch cabinet, aiming at the defects in the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the intelligent dehumidifying device for the low-voltage switch cabinet is constructed and comprises the switch cabinet and a controller, wherein a dehumidifying box is arranged on the inner wall of the switch cabinet, two transverse sliding strips which are longitudinally arranged, a longitudinal driving gear positioned between the two transverse sliding strips and a stepping motor driving the driving gear to rotate are transversely and slidably arranged in the dehumidifying box; racks meshed with the driving gears are arranged on the surfaces of the two opposite sides of the transverse sliding strips, a transverse mounting plate is arranged at the end part of each transverse sliding strip, and flaky moisture absorption cotton is arranged on the surface of the front side of each mounting plate; the surfaces of the left side and the right side of the dehumidification box are respectively provided with an opening for the mounting plate to enter and exit; two oblique extrusion rubber rolls which correspondingly extrude the moisture absorption cotton one by one are rotatably arranged in the dehumidification box, and the two extrusion rubber rolls are arranged in a V shape; a transverse piston cavity is formed at the inner bottom of the dehumidification box, a piston rod and a return spring for moving and resetting the piston rod are arranged in the piston cavity, a liquid receiving hopper for receiving liquid falling from the lower ends of the two extrusion rubber rollers is arranged on the upper surface of the piston cavity in a penetrating manner, and a push block for driving the piston rod to move and a lifting unit for driving the push block to lift are arranged at the lower end of the mounting plate close to the piston rod; one end of the piston cavity, which is far away from the piston rod, is communicated with the outside through a plurality of capillary tubes; the stepping motor and the lifting unit are electrically connected with and controlled by the controller.
According to the intelligent dehumidifying device for the low-voltage switch cabinet, the two mounting plates are driven to perform retraction and extension once by the aid of the stepping motor during operation, so that the working stroke is formed; and a liquid level sensor is embedded in the inner wall of the piston cavity, and the controller adjusts the interval time of adjacent working strokes of the stepping motor according to the detection data of the liquid level sensor.
According to the intelligent dehumidification device for the low-voltage switch cabinet, the controller drives the lifting unit to operate when the detection data of the liquid level sensor reaches a set threshold value, and the push block is driven to descend to a position opposite to the piston rod.
According to the intelligent dehumidification device for the low-voltage switch cabinet, a water receiving tank is arranged on the dehumidification box, and the two mounting plates are located above the water receiving tank; and a water suction pump for sucking water in the water receiving tank into the liquid receiving bucket is arranged in the dehumidification box, and the water suction pump is electrically connected with the controller and is controlled by the controller.
The intelligent dehumidifying device for the low-voltage switch cabinet is characterized in that a heating net is embedded in the mounting plate, the heating net is controlled by the controller to operate, and the mounting plate is made of heat conducting materials; the inner top of the dehumidification box is provided with a condensation box, the bottom of the condensation box is provided with a conical flow guide surface, and the edge of the liquid receiving hopper is connected with the inner wall of the dehumidification box.
According to the intelligent dehumidification device for the low-voltage switch cabinet, condensate is arranged in the condensation box, and a semiconductor refrigeration sheet assembly for refrigerating the condensation box is arranged on the outer side surface of the switch cabinet.
The intelligent dehumidification device of the low-voltage switch cabinet, disclosed by the invention, is characterized in that the semiconductor refrigeration piece assembly comprises a semiconductor refrigeration piece and a cooling fan for cooling a heating surface of the semiconductor refrigeration piece; the outer side surface of the switch cabinet is provided with a mounting groove for mounting the semiconductor refrigerating sheet; one end of the condensing box penetrates into the mounting groove and is attached to the refrigerating surface of the semiconductor refrigerating sheet.
An intelligent dehumidification method of a low-voltage switch cabinet is applied to the intelligent dehumidification device of the low-voltage switch cabinet, and the implementation method comprises the following steps:
under the control of the controller, the stepping motor drives the driving gear to rotate and drives the two transverse sliding strips to move, then the two mounting plates are driven to extend out from the openings at the two sides of the dehumidification box, the moisture absorption cotton absorbs the water vapor in the switch cabinet, after the moisture absorption is carried out for a certain time, the stepping motor drives the mounting plates to extend into the dehumidification box, the moisture absorption cotton is slowly extruded by the oblique extrusion rubber roll, the moisture absorption cotton is watered and extruded out, the extruded water slides down along the extrusion rubber roll and falls into the liquid receiving hopper and enters the piston cavity, when the liquid level in the piston cavity reaches a certain height, the controller controls the lifting unit to operate so that the push block is lowered to the position opposite to the piston rod, when the next mounting plate stretches into the dehumidification box, the push block pushes the piston rod to move, water in the piston cavity is discharged through the capillary tubes, and the piston rod resets under the action of the reset spring after the pushing force of the push block disappears.
The invention has the beneficial effects that: under the control of the controller, the stepping motor drives the driving gear to rotate and drives the two transverse sliding strips to move, then the two mounting plates are driven to extend out from the openings at the two sides of the dehumidification box, the moisture absorption cotton absorbs the water vapor in the switch cabinet, after the moisture absorption is carried out for a certain time, the stepping motor drives the mounting plates to extend into the dehumidification box, the moisture absorption cotton is slowly extruded by the oblique extrusion rubber roll, the moisture absorption cotton is watered and extruded out, the extruded water slides down along the extrusion rubber roll and falls into the liquid receiving hopper and enters the piston cavity, when the liquid level in the piston cavity reaches a certain height, the controller controls the lifting unit to operate so that the push block is lowered to the position opposite to the piston rod, when the next mounting plate extends into the dehumidification box, the push block pushes the piston rod to move, water in the piston cavity is discharged through the capillary tubes, and the piston rod is reset under the action of the reset spring after the pushing force of the push block disappears; adopt two piece absorbent cottons to and the mode of slant extrusion play water, not only can promote the area that moisture absorption treatment can cover, guarantee moisture absorption effect can carry out intelligence hydrofuge according to setting for simultaneously, degree of automation is high.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be further described with reference to the accompanying drawings and embodiments, wherein the drawings in the following description are only part of the embodiments of the present invention, and for those skilled in the art, other drawings can be obtained without inventive efforts according to the accompanying drawings:
FIG. 1 is a schematic structural diagram of an intelligent dehumidifying apparatus for a low-voltage switchgear according to a preferred embodiment of the present invention;
fig. 2 is a sectional view of the intelligent dehumidifying apparatus for low-voltage switchgear according to the preferred embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without inventive step, are within the scope of the present invention.
As shown in fig. 1 and also referring to fig. 2, the intelligent dehumidifying device for a low-voltage switch cabinet according to a preferred embodiment of the present invention includes a switch cabinet 1 and a controller, wherein a dehumidifying box 2 is disposed on an inner wall of the switch cabinet 1, two transverse sliding bars 20 longitudinally arranged are transversely slidably disposed in the dehumidifying box 2, a longitudinal driving gear 21 disposed between the two transverse sliding bars 20, and a stepping motor (not shown in the drawings, preferably, a movable end of the stepping motor is disposed on an outer surface of the dehumidifying box in a penetrating manner); the opposite side surfaces of the two transverse sliding strips 20 are respectively provided with a rack 200 meshed with the driving gear 21, the end part of the transverse sliding strip 20 is provided with a transverse mounting plate 22, and the front side surface of the mounting plate 22 is provided with a sheet-shaped absorbent cotton 23; the surfaces of the left side and the right side of the dehumidification box 2 are respectively provided with an opening for the installation plate 22 to enter and exit; two oblique extrusion rubber rolls 24 which correspondingly extrude the moisture absorption cotton one by one are rotatably arranged in the dehumidification box 2, and the two extrusion rubber rolls 24 are arranged in a V shape; a transverse piston cavity 25 is formed at the inner bottom of the dehumidification box 2, a piston rod 250 and a return spring 251 for moving and returning the piston rod 250 are arranged in the piston cavity 25, a liquid receiving hopper 26 for receiving liquid falling from the lower ends of two extrusion rubber rollers penetrates through the upper surface of the piston cavity 25, and a push block 27 for driving the piston rod 250 to move and a lifting unit (preferably an electric push rod) for driving the push block 27 to lift are arranged at the lower end of the mounting plate 22 close to the piston rod 250; the end of the piston chamber 25 remote from the piston rod 250 communicates with the outside through a plurality of capillary tubes 28; the stepping motor and the lifting unit are electrically connected with and controlled by the controller;
under the control of the controller, the stepper motor drives the driving gear 21 to rotate, drives the two transverse sliding strips 20 to move, then the two mounting plates 22 are driven to extend out from the openings at the two sides of the dehumidification box 1, the moisture absorption cotton 23 absorbs the water vapor in the switch cabinet 1, after a certain period of absorption, the stepper motor drives the mounting plates 22 to extend into the dehumidification box 1, the absorbent cotton 23 is slowly extruded by the oblique extrusion rubber roll 24, water on the absorbent cotton 23 is extruded out, the extruded water slides down along the extrusion rubber roll 24 and falls into the liquid receiving hopper 26 and enters the piston cavity 25, when the liquid level in the piston cavity 25 reaches a certain height, the controller controls the lifting unit to operate so that the push block 27 is lowered to a position opposite to the piston rod 250, when the next mounting plate 22 extends into the dehumidification box 1, the push block 27 pushes the piston rod 250 to move, water in the piston cavity 25 is discharged through the plurality of capillary tubes 28, and the piston rod 250 is reset under the action of the reset spring 251 after the pushing force of the push block 27 disappears;
by adopting the two pieces of moisture absorption cotton 23 and the mode of obliquely extruding water, the area which can be covered by moisture absorption treatment can be increased, the moisture absorption effect is ensured, meanwhile, intelligent moisture removal can be carried out according to setting, and the automation degree is high;
the extrusion rubber roll 24 is used for extruding moisture of the moisture absorption cotton 23 and simultaneously plays a role in pressing the mounting plate 22, and in addition, the extrusion rubber roll 24 is also used for guiding extruded water, so that the stability is good, the structural design is very simple, and the cost is low.
Preferably, the stepping motor drives the two mounting plates 22 to perform a retraction and extension movement as a working stroke; a liquid level sensor 252 is embedded in the inner wall of the piston cavity 25, and the controller adjusts the interval time of adjacent working strokes of the stepping motor according to the detection data of the liquid level sensor 252; the total moisture brought by dehumidification at each time or dehumidification for each time can be judged through liquid level rising data obtained by sensing the liquid level height, and when the brought moisture is lower than a set threshold value, the time interval between two working strokes can be prolonged, so that the mounting plate can adsorb more moisture at each time, the energy consumption is reduced, otherwise, the moisture extrusion frequency of the mounting plate needs to be increased; preferably, the liquid level sensor is arranged to start detection in a timed manner.
Preferably, the controller drives the lifting unit to operate when the detection data of the liquid level sensor 252 reaches a set threshold value, so as to drive the push block 27 to descend to a position opposite to the piston rod 250.
Preferably, the dehumidification box 2 is provided with a water receiving tank 29, and the two mounting plates 22 are both positioned above the water receiving tank 29; a water suction pump 210 for sucking water in the water receiving tank 29 into the liquid receiving hopper 26 is arranged in the dehumidification box 2, and the water suction pump 210 is electrically connected with and controlled by the controller; the influence of accidental water dripping of the mounting plate 22 on components in the switch cabinet is avoided.
Preferably, a heating net is embedded in the mounting plate 22, the heating net is controlled by a controller to operate, and the mounting plate 22 is made of heat conducting materials; the inner top of the dehumidification box 2 is provided with a condensation box 3, the bottom of the condensation box 3 is provided with a conical flow guide surface 30, and the edge of the liquid receiving hopper 26 is connected with the inner wall of the dehumidification box 2; it opens the heating network when being convenient for in the installation panel 22 retraction dehumidification case 2 as required, heat the moisture evaporation that makes on it to the dehumidification cotton 23, vapor rises to meet cold water conservancy diversion face 30 and can condense into the drop of water and follow water conservancy diversion face 30 gliding, fall into and connect liquid fill 26, guarantee dehumidification effect that can be further through this kind of mode, also can be when cubical switchboard 1 inside moisture is less, extrude under the condition that the rubber roll 24 is difficult to effectively extrude moisture, use the heating dehumidification function alone, both can complement promptly, make holistic dehumidification ability and all strengthen by a wide margin to application environment's suitability.
Preferably, condensate is arranged in the condensing box 3, and a semiconductor refrigerating sheet assembly 31 for refrigerating the condensing box 3 is arranged on the outer side surface of the switch cabinet 1; the semiconductor chilling plate assembly 31 comprises a semiconductor chilling plate 310 and a cooling fan 311 for cooling the heating surface of the semiconductor chilling plate; the outer side surface of the switch cabinet 1 is provided with a mounting groove 10 for mounting the semiconductor refrigeration piece 310; one end of the condensing box 3 penetrates into the mounting groove 10 and is attached to the refrigerating surface of the semiconductor refrigerating sheet 310; the structure is simple, and the condensing box is convenient to refrigerate.
An intelligent dehumidification method of a low-voltage switch cabinet is applied to the intelligent dehumidification device of the low-voltage switch cabinet, and the implementation method comprises the following steps:
under the control of the controller, the stepping motor drives the driving gear to rotate and drives the two transverse sliding strips to move, then the two mounting plates are driven to extend out from the openings at the two sides of the dehumidification box, the moisture absorption cotton absorbs the water vapor in the switch cabinet, after the moisture absorption is carried out for a certain time, the stepping motor drives the mounting plates to extend into the dehumidification box, the moisture absorption cotton is slowly extruded by the oblique extrusion rubber roll, the moisture absorption cotton is watered and extruded out, the extruded water slides down along the extrusion rubber roll and falls into the liquid receiving hopper and enters the piston cavity, when the liquid level in the piston cavity reaches a certain height, the controller controls the lifting unit to operate so that the push block is lowered to the position opposite to the piston rod, when the next mounting plate extends into the dehumidification box, the push block pushes the piston rod to move, water in the piston cavity is discharged through the capillary tubes, and the piston rod is reset under the action of the reset spring after the pushing force of the push block disappears;
adopt two piece absorbent cottons to and the mode of slant extrusion play water, not only can promote the area that moisture absorption treatment can cover, guarantee moisture absorption effect can carry out intelligence hydrofuge according to setting for simultaneously, degree of automation is high.
It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.
Claims (8)
1. An intelligent dehumidifying device of a low-voltage switch cabinet is characterized by comprising a switch cabinet and a controller, wherein a dehumidifying box is arranged on the inner wall of the switch cabinet, two transverse sliding strips which are longitudinally arranged, a longitudinal driving gear positioned between the two transverse sliding strips and a stepping motor driving the driving gear to rotate are transversely and slidably arranged in the dehumidifying box; racks meshed with the driving gears are arranged on the surfaces of the two opposite sides of the transverse sliding strips, a transverse mounting plate is arranged at the end part of each transverse sliding strip, and flaky moisture absorption cotton is arranged on the surface of the front side of each mounting plate; the surfaces of the left side and the right side of the dehumidification box are respectively provided with an opening for the mounting plate to enter and exit; two oblique extrusion rubber rolls which correspondingly extrude the moisture absorption cotton one by one are rotatably arranged in the dehumidification box, and the two extrusion rubber rolls are arranged in a V shape; a transverse piston cavity is formed at the inner bottom of the dehumidification box, a piston rod and a return spring for moving and resetting the piston rod are arranged in the piston cavity, a liquid receiving hopper for receiving liquid falling from the lower ends of the two extrusion rubber rollers is arranged on the upper surface of the piston cavity in a penetrating manner, and a push block for driving the piston rod to move and a lifting unit for driving the push block to lift are arranged at the lower end of the mounting plate close to the piston rod; one end of the piston cavity, which is far away from the piston rod, is communicated with the outside through a plurality of capillary tubes; the stepping motor and the lifting unit are electrically connected with and controlled by the controller.
2. The intelligent dehumidification device of the low-voltage switch cabinet as claimed in claim 1, wherein the stepping motor operates to drive the two mounting plates to perform a retraction and extension movement as a working stroke; and a liquid level sensor is embedded in the inner wall of the piston cavity, and the controller adjusts the interval time of adjacent working strokes of the stepping motor according to the detection data of the liquid level sensor.
3. The intelligent dehumidification device for the low-voltage switch cabinet as claimed in claim 2, wherein the controller drives the lifting unit to operate when detection data of the liquid level sensor reaches a set threshold value, and drives the push block to descend to a position opposite to the piston rod.
4. The intelligent dehumidification device for the low-voltage switch cabinet according to any one of claims 1 to 3, wherein a water receiving tank is arranged on the dehumidification tank, and the two mounting plates are both positioned above the water receiving tank; and a water suction pump for sucking water in the water receiving tank into the liquid receiving bucket is arranged in the dehumidification box, and the water suction pump is electrically connected with the controller and is controlled by the controller.
5. The intelligent dehumidification device of a low-voltage switch cabinet according to any one of claims 1 to 3, wherein a heating net is embedded in the mounting plate, the heating net is controlled by the controller to operate, and the mounting plate is made of a heat conduction material; the inner top of the dehumidification box is provided with a condensation box, the bottom of the condensation box is provided with a conical flow guide surface, and the edge of the liquid receiving hopper is connected with the inner wall of the dehumidification box.
6. The intelligent dehumidification device for the low-voltage switch cabinet according to claim 5, wherein a condensate is arranged in the condensation box, and a semiconductor refrigeration sheet assembly for refrigerating the condensation box is arranged on the outer side surface of the switch cabinet.
7. The intelligent dehumidification device for the low-voltage switch cabinet as claimed in claim 6, wherein the semiconductor refrigeration sheet assembly comprises a semiconductor refrigeration sheet and a heat dissipation fan for dissipating heat from a heating surface of the semiconductor refrigeration sheet; the outer side surface of the switch cabinet is provided with a mounting groove for mounting the semiconductor refrigerating sheet; one end of the condensing box penetrates into the mounting groove and is attached to the refrigerating surface of the semiconductor refrigerating sheet.
8. An intelligent dehumidification method of a low-voltage switch cabinet, which is applied to the intelligent dehumidification device of the low-voltage switch cabinet as claimed in any one of claims 1 to 7, and is characterized by comprising the following steps:
under the control of the controller, the stepping motor drives the driving gear to rotate and drives the two transverse sliding strips to move, then the two mounting plates are driven to extend out from the openings at the two sides of the dehumidification box, the moisture absorption cotton absorbs the water vapor in the switch cabinet, after the moisture absorption is carried out for a certain time, the stepping motor drives the mounting plates to extend into the dehumidification box, the moisture absorption cotton is slowly extruded by the oblique extrusion rubber roll, the moisture absorption cotton is watered and extruded out, the extruded water slides down along the extrusion rubber roll and falls into the liquid receiving hopper and enters the piston cavity, when the liquid level in the piston cavity reaches a certain height, the controller controls the lifting unit to operate so that the push block is lowered to the position opposite to the piston rod, when the next mounting plate stretches into the dehumidification box, the push block pushes the piston rod to move, water in the piston cavity is discharged through the capillary tubes, and the piston rod resets under the action of the reset spring after the pushing force of the push block disappears.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111291993.9A CN113745988B (en) | 2021-11-03 | 2021-11-03 | Intelligent dehumidification device and dehumidification method for low-voltage switch cabinet |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111291993.9A CN113745988B (en) | 2021-11-03 | 2021-11-03 | Intelligent dehumidification device and dehumidification method for low-voltage switch cabinet |
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| Publication Number | Publication Date |
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| CN113745988A CN113745988A (en) | 2021-12-03 |
| CN113745988B true CN113745988B (en) | 2022-02-11 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN209729668U (en) * | 2019-04-16 | 2019-12-03 | 中豪电力科技有限公司 | A kind of transformer moisture absorption apparatus |
| CN211701227U (en) * | 2020-04-26 | 2020-10-16 | 浙江炬宏电力设备有限公司 | Primary and secondary fusion ring main unit |
| CN211958372U (en) * | 2020-06-01 | 2020-11-17 | 浙江新跃电气有限公司 | High-protection switch cabinet |
| CN113035608A (en) * | 2021-03-22 | 2021-06-25 | 杭州临润贸易有限公司 | A intelligence switch that is used for moist environment to have a waterproof function |
| CN112928624B (en) * | 2021-03-22 | 2023-04-07 | 南通宁海机械电器有限公司 | Gas-heated inclined drainage type condensation removing switch cabinet |
| CN113300231B (en) * | 2021-05-12 | 2022-11-15 | 湖南湘能智能配电设备有限公司 | Double-pressure drainage dehumidification type ring main unit |
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