Novel outdoor grid-connected cabinet dehumidification device

Abstract

The invention relates to a novel outdoor grid-connected cabinet dehumidification device which comprises a grid-connected cabinet, drawers and a heater, the grid-connected cabinet is of a multi-layer structure, each layer is provided with one drawer in a sliding mode, each drawer is internally provided with a physical drying agent, moisture absorption holes are formed in the bottoms of the drawers, and the hole diameter of the moisture absorption holes is smaller than the particle diameter of the physical drying agent; the heater is arranged at the bottom of the grid-connected cabinet, the drawer on the bottommost layer of the grid-connected cabinet is arranged above the heater, and the heater can heat the drawer above the heater. According to the novel outdoor grid-connected cabinet dehumidification device provided by the invention, the physical drying agent is placed in the drawers and is convenient to move, the plurality of drawers are arranged, the drying agents with different proportions can be configured according to different positions of the grid-connected cabinet, and the dehumidification requirements in different environments are met; after the physical drying agent loses efficacy, the heater at the bottom of the grid-connected cabinet is used for heating the drawer, so that drying and recycling of the physical drying agent are realized, and the maintenance cost is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of grid connection cabinets, and particularly relates to a new type of outdoor grid connection cabinet dehumidification device. Background Art

[0002] After moisture in the outdoor environment enters the grid connection cabinet, it may cause electrical components to be affected by moisture, reduce their insulation performance, increase the risk of faults such as electric leakage and short circuit, affect the normal operation of the equipment, and shorten the service life. Moreover, the condensed water droplets of humid air in the cabinet will cause metal parts to be affected by moisture and corrode and rust, which may lead to damage to the metal facilities of electrical equipment, and there are potential safety hazards such as electric discharge and electric leakage, threatening the safety of personnel and the stable operation of the power grid.

[0003] At present, a variety of dehumidification methods are adopted. For example, a dehumidification box, a dehumidification board, a desiccant, etc. are set in the grid connection cabinet to achieve the purpose of dehumidification by adsorbing moisture in the air; some grid connection cabinets are also equipped with devices such as dehumidifiers and water pumps to achieve more efficient dehumidification; in addition, using a ventilation and heat dissipation system to take away the moisture in the cabinet through air circulation is also one of the common dehumidification methods.

[0004] Despite a variety of dehumidification methods and technologies, in actual applications, there are still some problems. For example, the dehumidification effect of some dehumidification devices is not ideal enough to fully meet the dehumidification requirements in the complex outdoor environment; the maintenance cost of some dehumidification devices is relatively high, and the desiccant needs to be replaced regularly. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a new type of outdoor grid connection cabinet dehumidification device in view of the deficiencies of the prior art. The physical desiccant inside can be reused, reducing the maintenance cost, and at the same time meeting the dehumidification requirements in different environments.

[0006] To achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A new type of outdoor grid connection cabinet dehumidification device includes a grid connection cabinet, a drawer and a heater. The grid connection cabinet is a multi-layer structure, and a drawer is slidably arranged on each layer. A physical desiccant is arranged inside each drawer. A moisture absorption hole is opened at the bottom of the drawer, and the aperture of the moisture absorption hole is smaller than the particle diameter of the physical desiccant. The heater is arranged at the bottom of the grid connection cabinet. The drawer at the bottom layer of the grid connection cabinet is arranged above the heater, and the heater can heat the drawer above it.

[0008] To better implement the present invention, in the above structure, further optimization is made. The physical desiccant is a moisture absorption gel.

[0009] To better implement the present invention, in the above structure, further optimization is made. An observation window is vertically arranged on the front of the drawer.

[0010] To better implement the present invention, further optimization is made to the above structure, and a desiccant humidity comparison card is also provided on the front of the drawer.

[0011] To better implement the present invention, further optimization is made to the above structure, and the grid connection cabinet is provided with three layers, which are the high-voltage area, the instrument area, and the low-voltage area from high to low in sequence.

[0012] To better implement the present invention, further optimization is made to the above structure, and the drawers in the high-voltage area and the instrument area are both arranged at the bottom.

[0013] To better implement the present invention, further optimization is made to the above structure, and the drawer is made of insulating isolation board material.

[0014] To better implement the present invention, further optimization is made to the above structure, and all the leakage points on the grid connection cabinet communicating with the outside are subjected to sealing treatment.

[0015] The present invention has the following beneficial effects compared with the prior art:

[0016] The novel outdoor grid connection cabinet dehumidification device provided by the present invention places the physical desiccant in the drawer, which is convenient for movement. Moreover, multiple drawers are provided, and different ratios of desiccants can be configured for different positions of the grid connection cabinet to meet the dehumidification requirements in different environments; after the physical desiccant fails, the heater at the bottom of the grid connection cabinet is used to heat the drawer to realize the drying and reuse of the physical desiccant, thereby reducing the maintenance cost. At the same time, in special cases, the heater can also be directly started to dehumidify the grid connection cabinet, playing a role of standby protection. Brief Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 is the structural schematic diagram of the novel outdoor grid connection cabinet dehumidification device of the present invention;

[0019] Figure 2 is the front view of the drawer in the novel outdoor grid connection cabinet dehumidification device of the present invention;

[0020] Figure 3 is Figure 2 the cross-sectional view taken along A-A in

[0021] In the figure:

[0022] 1 - Grid - connection cabinet, 101 - High - voltage area, 102 - Instrument area, 103 - Low - voltage area, 2 - Drawer, 201 - Moisture - absorbing hole, 3 - Heater, 4 - Physical desiccant, 5 - Observation window, 6 - Desiccant humidity comparison card. Detailed implementation manners

[0023] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other implementation manners obtained by those of ordinary skill in the art without creative efforts fall within the scope protected by the present invention.

[0024] In the description of the present invention, it should be noted that unless otherwise specified, the meaning of ″a plurality of″ is two or more; the orientation or positional relationships indicated by the terms ″upper″, ″lower″, ″left″, ″right″, ″inner″, ″outer″, ″front end″, ″rear end″, ″head″, ″tail″, etc. are based on the orientation or positional relationships shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation of the present invention. In addition, the terms ″first″, ″second″, ″third″, etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0025] In the description of the present invention, it should also be noted that unless otherwise clearly defined and limited, the terms ″install″, ″connect″, ″couple″ should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] Please refer to Figures 1-3, the novel outdoor grid-connected cabinet dehumidification device provided by the present invention includes a grid-connected cabinet 1, a drawer 2, and a heater 3. The grid-connected cabinet 1 is a multi-layer structure, and a drawer 2 is slidably provided on each layer. The drawer 2 is made of insulating and isolating plates to protect the safety of the operator. In this embodiment, the grid-connected cabinet 1 is provided with three layers, which are the high-voltage area 101, the instrument area 102, and the low-voltage area 103 from high to low in sequence. The drawers 2 in the high-voltage area 101 and the instrument area 102 are both arranged at the bottom. The zoning setting can be equipped with corresponding proportions of desiccants according to the humidity sensitivity of each area, and be reasonably configured to meet the dehumidification work under different requirements. A physical desiccant 4 is arranged inside each drawer 2. They adsorb and lock the water vapor in the air through their own adsorption pores. Such desiccants can be reused by heating. For example, silica gel desiccants can be baked at a high temperature of 80-120 °C to remove the internal moisture to the greatest extent and restore them to a dry state for reuse. Common desiccants include silica gel, calcium chloride, montmorillonite, etc., and hygroscopic gel particles are preferably used.

[0027] A moisture absorption hole 201 is opened at the bottom of the drawer 2. The aperture of the moisture absorption hole 201 is smaller than the particle diameter of the physical desiccant 4. The moisture at the bottom enters the drawer 2 through the moisture absorption hole 201 and reacts with the desiccant. An observation window 5 is vertically arranged on the front of the drawer 2. Since the physical desiccant 4 in the drawer 2 is piled up very thickly, the reaction will gradually approach the center from the outside. The reaction state of the physical desiccant 4 can be viewed through the observation window 5. If the physical desiccant 4 in the center has also reacted, then this group of physical desiccants 4 has reached the saturated state and cannot continue to absorb moisture. A desiccant humidity comparison card 6 is also arranged on the front of the drawer 2. By comparing the humidity color observed through the observation window 5 with the color of the desiccant humidity comparison card 6, the state of the physical desiccant 4 can be quickly judged.

[0028] The heater 3 is arranged at the bottom of the grid-connected cabinet 1. The drawer 2 at the bottom layer of the grid-connected cabinet 1 is arranged above the heater 3, and the heater 3 can heat the drawer 2 above it. During use, when the physical desiccant 4 on which layer fails, the drawer 2 at the bottom layer is taken out, and the drawer 2 of the failed layer is placed on the heater 3 for heating and restoration. The setting of the heater 3 can, after the physical desiccant 4 absorbs moisture and becomes saturated and fails, use the heater 3 at the bottom of the grid-connected cabinet 1 to heat the physical desiccant 4 in the drawer 2 to realize the drying and reuse of the physical desiccant 4, thereby reducing the maintenance cost. At the same time, in special cases, the heater 3 can also be directly started to dehumidify the grid-connected cabinet 1, playing a role of standby protection.

[0029] In addition, the sources of moisture in the grid cabinet 1 are divided into multiple aspects. When the humidity of the outside air is high, such as in the rainy season, humid weather or near water, high-humidity air can easily enter the inside through the vents, gaps, etc. of the grid cabinet 1, increasing the moisture in the cabinet. The temperature difference between day and night, as well as the temperature changes in different seasons, will cause the air in the grid cabinet 1 to reach the dew point when the temperature drops, thereby forming condensation and increasing the moisture in the cabinet. In heavy rain or poor drainage, rainwater may enter the cabinet through the gaps, holes, etc. on the top, side or bottom of the grid cabinet 1, bringing a lot of moisture. The sealing strips on the cabinet doors, side panels, top panels and other parts of the cabinet body are aging, damaged or improperly installed, which will cause external moisture to enter the cabinet from the gaps. Therefore, the sealing of the grid cabinet 1 must be done well. For cost considerations, a combination of strips and sealants can be used, and all leakage points on the grid cabinet 1 that are connected to the outside world are sealed.

[0030] Under normal conditions, the moisture inside the power cabinet 1 is absorbed by the physical desiccant 4 in the drawer 2, and the inside of the power cabinet 1 is kept dry. The inspection personnel regularly observe the moisture absorption state of the physical desiccant 4 through the observation window 5. When the physical desiccant 4 in the center of the drawer 2 is found to be saturated with moisture through color comparison of the desiccant humidity comparison card 6, the corresponding drawer 2 is placed on the heater 3, and then the heater 3 is started to heat and restore the physical desiccant 4 to restore its moisture absorption function, thereby realizing the drying and reuse of the physical desiccant 4. After the restoration is completed, the corresponding drawer 2 can be restored to its original position.

[0031] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A new type of outdoor grid-connected cabinet dehumidification device, characterized in that: The invention comprises a power cabinet (1), a drawer (2) and a heater (3); the power cabinet (1) is a multi-layer structure, and each layer is provided with a drawer (2) for sliding, each drawer (2) is provided with a physical desiccant (4), the bottom of the drawer (2) is provided with a moisture absorption hole (201), the hole diameter of the moisture absorption hole (201) is smaller than the particle diameter of the physical desiccant (4), the heater (3) is arranged at the bottom of the power cabinet (1), the drawer (2) at the bottom layer of the power cabinet (1) is arranged above the heater (3), and the heater (3) can heat the drawer (2) above it.

2. A novel outdoor grid-connected cabinet dehumidification device according to claim 1, characterized in that: The physical desiccant (4) is a hygroscopic gel.

3. A novel outdoor grid-connected cabinet dehumidification device according to claim 2, characterized in that: An observation window (5) is vertically arranged on the front side of the drawer (2).

4. A novel outdoor grid-connected cabinet dehumidification device according to claim 3, characterized in that: A desiccant humidity comparison card (6) is also provided on the front side of the drawer (2).

5. A novel outdoor grid-connected cabinet dehumidification device according to any one of claims 1 to 4, characterized in that: The grid-connected cabinet (1) is provided with three layers, which are, from high to low, a high-voltage area (101), an instrument area (102) and a low-voltage area (103).

6. A novel outdoor grid-connected cabinet dehumidification device according to claim 5, characterized in that: The drawers (2) in the high-pressure area (101) and the instrument area (102) are both arranged at the bottom.

7. A novel outdoor grid-connected cabinet dehumidification device according to claim 1, characterized in that: The drawer (2) is made of insulating isolation board material.

8. The novel outdoor grid-connected cabinet dehumidification device according to claim 1 is characterized in that: The leakage points on the grid-connected cabinet (1) that are connected to the outside are all sealed.

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