Power distribution cabinet capable of preventing condensation in cabinet

Abstract

The utility model discloses a power distribution cabinet capable of preventing condensation in the cabinet. The power distribution cabinet comprises a cabinet body, a cross-flow cooling fan for a dry-type transformer, a ventilation base, a plurality of temperature and humidity sensors, a touch display screen and a plurality of side fans, the cabinet body is arranged on the top surface of the ventilation base and is communicated with the ventilation base; a cross-flow cooling fan for the dry-type transformer is accommodated in the ventilation base; a plurality of ventilation structures are arranged on the side wall of the ventilation base and are communicated with the environment outside the cabinet body. The cabinet body not only can reduce the temperature of the environment in the power distribution cabinet used in the hot and humid areas, but also can push and exhaust humid air in the non-closed power distribution cabinet through the cross-flow cooling fan for the dry-type transformer in time, thereby reducing the temperature difference between the cabinet body and the shell, and avoiding condensation in the power distribution cabinet used in the hot and humid areas.

Description

Technical Field

[0001] This application relates to the field of electrical equipment technology, and in particular to a distribution cabinet that prevents condensation inside the cabinet. Background Technology

[0002] In hot and humid regions, the air has a high moisture content. When this air encounters the surface of an electrical cabinet casing that is below its dew point, water vapor condenses on the surface, forming dew droplets. The metal casing's temperature changes faster than the air inside the cabinet. The poor airflow inside the cabinet and the prolonged stagnation of air increase the likelihood of air droplets meeting and condensing. Simultaneously, the temperature difference between the interior and exterior of the cabinet further promotes condensation on the inner walls of the casing. In such areas, condensation problems are severe when using electrical cabinets.

[0003] When severe condensation occurs inside electrical equipment, it can not only cause short circuits in the internal wiring, but in severe cases, it can also lead to the paralysis of the entire wiring, resulting in serious losses.

[0004] First, the condensation phenomenon inside the high-voltage switchgear is generally determined by the moisture content of the air entering the switchgear, which in turn is determined by the ambient air in which the switchgear is located.

[0005] The commonly used method for decondensation removal in existing electrical cabinets is:

[0006] 1. Install a moisture-absorbing and dehumidifying device inside the distribution cabinet, similar to the moisture-absorbing lime bags in a cabinet, to absorb excess moisture from the air. This method requires replacement of the lime bags based on their moisture content over time. Furthermore, damp lime adhering to the inside of the electrical cabinet can corrode the cabinet and shorten its lifespan.

[0007] 2. Install an automatic dehumidification device. Humid air inside the cabinet is pushed into a dehumidification duct by a ventilation fan. In the duct, air droplets condense into water after passing through a semiconductor chip, and are then discharged from the cabinet through a drain pipe. This device requires a high degree of airtightness within the equipment. However, excessive sealing of the distribution cabinet in humid and hot regions can prevent the timely dissipation of heat generated by the electrical equipment inside. Furthermore, the automatic dehumidification device increases equipment costs.

[0008] 3. Installing an electric heater inside the equipment to heat the interior; however, this method only increases the unsaturation of water vapor in the air and does not remove the moisture from inside the cabinet. Furthermore, in humid and hot regions, the temperature of the distribution cabinet is already high, and further heating will accelerate the aging of the insulation components of the electrical equipment. For example, the anti-condensation ring network multi-bay electrical cabinet disclosed in CN202110085191.6 uses auxiliary heat dissipation devices on both sides of the ring network electrical cabinet and a cleaning device for the filter plates, which improves the air permeability of the filter plates. This improves the air circulation and heat dissipation efficiency of the ring network electrical cabinet, effectively preventing condensation caused by excessive temperature differences between the inside and outside of the cabinet, and effectively protecting the electrical components inside the cabinet. However, the air circulation inside the cabinet is still poor, which cannot meet the requirements for long-term use in high humidity and high temperature environments, and cannot effectively prevent the formation of condensation inside the cabinet under such conditions.

[0009] The information disclosed in the background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that such information constitutes prior art known to those skilled in the art. Utility Model Content

[0010] This application provides a distribution cabinet that prevents condensation inside the cabinet to address the above-mentioned technical problems. The cabinet has a directional airflow that promptly discharges high-humidity air and prevents condensation from forming inside the cabinet.

[0011] This application provides a power distribution cabinet for preventing condensation inside the cabinet, including: a cabinet body, a cross-flow cooling fan for dry-type transformers, a ventilation base, multiple temperature and humidity sensors, a touch display screen, and multiple side fans;

[0012] The cabinet is mounted on the top surface of the ventilation base and is connected to the ventilation base; the ventilation base houses the cross-flow cooling fan for the dry-type transformer.

[0013] Multiple ventilation structures are installed on the side wall of the ventilation base and are connected to the external environment of the cabinet.

[0014] Temperature and humidity sensors are spaced apart inside the cabinet.

[0015] A touch screen and multiple side fans are located on the upper exterior of the cabinet.

[0016] The touch screen is electrically connected to the temperature and humidity sensor, the side fan, and the cross-flow cooling fan for the dry transformer.

[0017] Preferably, the side fans are symmetrically arranged on opposite side walls of the cabinet.

[0018] Preferably, the side fans are symmetrically arranged on the front and rear doors of the cabinet.

[0019] Preferably, multiple ventilation structures are provided on the side wall of the cabinet.

[0020] Preferably, the ventilation structure consists of multiple elongated ventilation holes.

[0021] Preferably, the temperature and humidity sensor is located at the bottom of the cabinet near the ventilation base.

[0022] Preferably, the temperature and humidity sensor is located on the upper part of the cabinet, near the top surface of the cabinet.

[0023] Preferably, the height of the ventilation base is 150–250 mm.

[0024] The beneficial effects that this application can produce include:

[0025] 1) The anti-condensation distribution cabinet provided in this application not only reduces the temperature inside the distribution cabinet in humid and hot regions, but also promptly exhausts humid air from the non-sealed distribution cabinet through a cross-flow cooling fan using a dry-type transformer, reducing the temperature difference between the cabinet and the outer shell, thereby preventing condensation inside the distribution cabinet in humid and hot regions. Furthermore, the cabinet has low production costs, requires minimal internal structural modifications, and retains ample internal installation space; it requires less additional equipment, which helps reduce product costs and subsequent maintenance costs. It allows electrical equipment to operate stably in a condensation-free, dry environment, maintaining a low internal temperature. This solves the problems of insulation aging damage caused by high temperatures in humid and hot regions and the hazards posed by condensation to electrical equipment.

[0026] 2) The anti-condensation distribution cabinet provided in this application can reduce the encroachment on the internal environment of the cabinet by installing fans on the bottom and side door of the cabinet, thus ensuring the space for electrical equipment inside the cabinet. Attached Figure Description

[0027] Figure 1 A front view schematic diagram of an anti-condensation distribution cabinet in at least one embodiment provided in this application;

[0028] Figure 2 A side view of a condensation-proof distribution cabinet in at least one embodiment provided in this application;

[0029] Legend:

[0030] Ventilation vent 111, ventilation base 11, temperature and humidity sensor 12, touch screen 13, side fan 114, cabinet 1, cross-flow cooling fan for dry transformer 112. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0033] Technical means not detailed in this application and not used to solve the technical problems of this application are all set according to common general knowledge in the field, and multiple common general knowledge setting methods can be implemented.

[0034] See Figure 2 The anti-condensation distribution cabinet provided in this application includes: a cabinet body 1, a ventilation base 11, a cross-flow cooling fan 112 for dry-type transformers, multiple side fans 114, a temperature and humidity sensor 12, and a touch screen display 13; the cabinet body 1 is mounted on and connected to the ventilation base 11; the cross-flow cooling fan 112 for dry-type transformers is housed in the ventilation base 11; the side fans 114 are symmetrically arranged on opposite side walls of the cabinet body 1; the temperature and humidity sensors 12 are spaced apart on the upper outer side wall of the cabinet body 1 and are electrically connected to multiple temperature and humidity sensors 12 respectively installed inside the cabinet body 1; the touch screen display 13 is electrically connected to the cross-flow cooling fan 112 and the side fans 114 for dry-type transformers.

[0035] The ventilation base 11 has a ventilation structure on its side wall that connects to the external environment.

[0036] The cross-flow cooling fan 112 of the dry-type transformer installed in the ventilation base 11 draws air from outside the distribution cabinet into the cabinet 1 and pushes it through the cross-flow cooling fan 112 of the dry-type transformer, accelerating the air flow inside the cabinet 1. In conjunction with the multiple side fans 114 installed on the opposite side walls of the upper part of the cabinet 1, the air inside the cabinet 1 is drawn out, accelerating the directional flow of air inside the cabinet 1, which plays a role in blowing out the environment inside the cabinet 1, reducing the residence time of water-containing air inside the cabinet 1, effectively reducing the amount of condensation formed on the inner wall of the cabinet 1, and protecting the environment inside the cabinet 1.

[0037] Operators monitor temperature and humidity changes inside cabinet 1 via touchscreen display 13. Based on these changes, they can adjust the speed of the cross-flow cooling fan 112 and side fan 114 for the dry-type transformer using the touchscreen display 13, increasing or decreasing the fan speed as needed. By controlling the fan speed, the airflow rate inside cabinet 1 is increased, reducing the time air spends inside the cabinet and decreasing the likelihood of condensation. This also lowers the overall temperature of the inner wall and cavity of cabinet 1, bringing them closer together and reducing temperature differences, thus effectively protecting the electrical components inside the distribution cabinet for normal operation. The cross-flow cooling fan for the dry-type transformer reduces the temperature of the air entering cabinet 1, thereby reducing the humidity and minimizing condensation inside the cabinet.

[0038] In one specific embodiment, the side fans 114 are arranged in pairs on the front and rear doors of the cabinet 1. This symmetrical arrangement helps to enhance airflow and facilitates the installation of fans, while reducing the encroachment on the internal environment of the cabinet.

[0039] In one specific embodiment, the height of the ventilation base 11 is 150-250cm. Setting it at this height can prevent the cabinet 1 from being too high, while achieving a better ventilation effect.

[0040] In one specific embodiment, the temperature and humidity sensor 12 is disposed on the lower inner wall of the cabinet 1 and near the ventilation base 11.

[0041] In one specific embodiment, the temperature and humidity sensor 12 is disposed on the upper side wall of the cabinet 1 and near the top of the cabinet 1. This arrangement can accurately obtain the key temperature and humidity of the environmental monitoring area inside the cabinet 1.

[0042] In one specific embodiment, the cross-flow cooling fan for dry-type transformers is a GFDD590-65B model cross-flow cooling fan for dry-type transformers manufactured by Fujian Tianyi Electric Co., Ltd.

[0043] In one specific embodiment, ventilation holes 111 are respectively provided on the circumferential sidewalls of the ventilation base 11 to facilitate the entry of air into the ventilation base 11.

[0044] In one specific embodiment, multiple ventilation openings are provided on the interface connecting the top of the ventilation base 11 and the cabinet 1 to enable normal gas flow while ensuring that the strength of the cabinet meets the requirements for installation and use.

[0045] In one specific embodiment, multiple ventilation holes are provided on the side wall of the cabinet 1 to facilitate heat dissipation and ventilation of the environment inside the cabinet 1.

[0046] In one specific embodiment, the side fan 114 protrudes out of the cabinet 1, and a protective cover is provided on the protruding surface of the side fan 114 to improve safety during use.

[0047] In one specific embodiment, the power of the cross-flow cooling fan 112 for the dry-type transformer is 60-70W, and the power of the side fan 114 is 20-30W. This configuration can meet the needs of ventilation and cooling.

[0048] In one specific embodiment, a ventilated base 11 with a height of 200mm and a protection level meeting the requirements is installed at the bottom of the distribution cabinet. Multiple long ventilation holes 111 are provided on the peripheral side wall of the ventilation base. Multiple long ventilation holes 111 are provided on the top surface of the ventilation base that is connected to the distribution cabinet so that the cross-flow cooling fan 112 for dry-type transformers installed in the ventilation base 11 can be used. The air outlet of the cross-flow cooling fan 112 for dry-type transformers is set directly opposite the top plate so that the airflow generated by the cross-flow cooling fan 112 for dry-type transformers moves from bottom to top.

[0049] Side fans 114 are symmetrically installed on the upper side wall of the distribution cabinet. The side fans 114 are small axial flow fans with protective covers. The small axial flow fans draw air out of the cabinet from both sides of the distribution cabinet, so that the airflow inside the cabinet blows from inside the cabinet to outside.

[0050] Temperature and humidity sensors 12 are installed at the top and bottom of the distribution cabinet to sample the temperature in the area. Using two sets of temperature and humidity sensors 12 in this area reduces blind spots in the sampling of the cabinet's internal environment. Simultaneously, a touch screen display 13 is installed on the upper outer wall of the distribution cabinet. The touch screen display 13 is electrically connected to both sets of temperature and humidity sensors 12; it is also electrically connected to the cross-flow cooling fan 112 and side fan 114 used for the dry-type transformer, enabling monitoring of the temperature in key monitoring areas within the cabinet. This allows operators outside the cabinet to control the opening, closing, and speed of each fan via the touch screen display 13, thus adjusting the ventilation of the cabinet's internal environment in a timely manner according to changes in humidity. By adopting this structure, the condensation situation inside the distribution cabinet 1 is effectively reduced, allowing normal operation under conditions where the ambient temperature is above 40℃ and the relative humidity exceeds 60%.

[0051] The touch screen used is model IX-32EFSW-C, manufactured by Fuzhou Inno Electronics Technology Co., Ltd.

[0052] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A power distribution cabinet with anti-condensation features, characterized in that, include: Cabinet (1), cross-flow cooling fan for dry-type transformer (112), ventilation base (11), multiple temperature and humidity sensors (12), touch screen (13), multiple side fans (114); The cabinet (1) is set on the top surface of the ventilation base (11) and is connected to the ventilation base (11); the ventilation base (11) accommodates and installs a cross-flow cooling fan (112) for dry-type transformers; Multiple ventilation structures are provided on the side wall of the ventilation base (11) and are connected to the external environment of the cabinet (1); Temperature and humidity sensors (12) are spaced apart inside the cabinet (1); A touch screen (13) and multiple side fans (114) are installed on the upper exterior of the cabinet (1); The touch screen (13) is electrically connected to the temperature and humidity sensor (12), the side fan (114), and the cross-flow cooling fan (112) for the dry transformer.

2. The anti-condensation distribution cabinet according to claim 1, characterized in that, Side fans (114) are symmetrically arranged on opposite side walls of cabinet (1).

3. The anti-condensation distribution cabinet according to claim 1, characterized in that, Side fans (114) are symmetrically arranged on the front and rear doors of the cabinet (1).

4. The anti-condensation distribution cabinet according to claim 1, characterized in that, Multiple ventilation structures are installed on the side wall of the cabinet (1).

5. The anti-condensation distribution cabinet according to claim 1 or 4, characterized in that, The ventilation structure consists of multiple elongated ventilation holes (111).

6. The anti-condensation distribution cabinet according to claim 1, characterized in that, The temperature and humidity sensor (12) is located at the bottom of the cabinet (1) near the ventilation base (11).

7. The anti-condensation distribution cabinet according to claim 1, characterized in that, The temperature and humidity sensor (12) is installed on the upper part of the cabinet (1) near the top surface of the cabinet (1).

8. The anti-condensation distribution cabinet according to claim 1, characterized in that, The height of the ventilation base (11) is 150-250mm.

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