CN114641185A - an electrical cabinet - Google Patents

Abstract

The invention discloses an electrical cabinet, which includes a first cabinet and a second cabinet. Wherein, the first cabinet includes a first air conditioner, and the inside of the first cabinet is tempered and/or dehumidified by the first air conditioner. The second cabinet includes a first cavity and a second cavity, wherein the first cavity includes a second air conditioner, and the interior of the first cavity is tempered and/or dehumidified by the second air conditioner, and the surface of the second cavity is provided with The first through hole is used for external ventilation and heat exchange for the inside of the second cavity.

Description

an electrical cabinet

technical field

The invention relates to the technical field of power electronics, in particular to an electrical cabinet.

Background technique

Electrical cabinets are usually closed or semi-closed metal cabinets. In order to meet the requirements of the normal operation of the power system, it is usually assembled with switchgear, measuring instruments, protective electrical and auxiliary equipment according to the electrical wiring requirements. In technical fields such as wind power generation, it is usually necessary to connect an electrical cabinet between the generator and the mains line to control the power output of the generator to the grid connection of the mains line (that is, the input of the generated electrical energy to the power grid) in order to Provides power to electrical consumers, and disconnects generator power from utility lines.

The heat dissipation methods of the existing electrical cabinets mainly include air cooling and liquid cooling. Among them, the air cooling technology refers to a cooling method that uses a fan to drive the working air flow through the heating surface to take away the heat. The heat dissipation of this method is easily affected by the ambient temperature, and the air-cooled electrical cabinet is open, which cannot meet the application requirements of high humidity and high corrosion scenarios. The liquid-cooled cooling technology transfers the heat to the heat exchanger through the liquid circulation and adopts air-cooled centralized heat dissipation. Using liquid cooling technology, the entire electrical cabinet can be fully sealed to achieve IP54 protection level. However, liquid cooling technology has high costs, poor relative reliability, and widespread leakage risks, resulting in high maintenance costs throughout the life cycle.

SUMMARY OF THE INVENTION

Aiming at some or all of the problems in the prior art, the present invention provides an electrical cabinet, which maintains the forced air cooling method under the premise of meeting the application requirements of high temperature, high humidity and high corrosion environment, thereby not only reducing the cost of heat dissipation, The desired cooling effect is also achieved, and at the same time, reliability problems such as liquid seepage of liquid cooling are avoided. The electrical cabinet includes:

a first cabinet, including a first air conditioner, the first air conditioner is used for tempering and/or dehumidifying the interior of the first cabinet; and

Second cabinet, including:

a first cavity, which includes a second air conditioner, the second air conditioner is used to temperature and/or dehumidify the interior of the first cavity; and

The surface of the second cavity is provided with first through holes, and the first through holes are used for external ventilation and heat exchange for the interior of the second cavity.

Further, the device installation density of the first cabinet is greater than the device installation density of the second cabinet.

Further, the device mounting density of the first cavity is greater than the device mounting density of the second cavity.

Further, the second cavity is used to install a device whose calorific value or cooling air volume is higher than or equal to a specified threshold, and the surface is provided with an anti-corrosion layer.

Further, the first cabinet includes at least one cabinet body, the cabinet body adopts a sealed design, and the surface is provided with a first anti-corrosion layer.

Further, the anti-corrosion grade of the first anti-corrosion layer is not lower than the C4 grade.

Further, the second cabinet includes at least one cabinet body, and the surface of the cabinet body is provided with a second anti-corrosion layer.

Further, the anti-corrosion level of the second anti-corrosion layer is not lower than the C4 level.

Further, the first cavity adopts a sealed design.

Further, the electrical cabinet further includes a fan, and the fan is disposed at the first through hole, and the second cavity further includes an air inlet, and an air duct is disposed between the fan and the fan, so as to prevent The inside of the second cavity conducts external ventilation and heat exchange.

Further, the number of the first air conditioner, the second air conditioner and the fan is set according to the calorific value or the cooling air volume requirement of the devices inside the first cabinet and the second cabinet.

Further, the electrical cabinet further includes a monitoring module, which is disposed inside the first cabinet and the second cabinet, and is used to measure the internal temperature and humidity of the first cabinet and the second cabinet in real time.

Further, the electrical cabinet further includes a control module for controlling the working modes of the first air conditioner and the second air conditioner according to the temperature and humidity inside the first cabinet and the second cabinet.

Another aspect of the present invention provides a frequency conversion cabinet, which adopts the aforementioned electrical cabinet.

The present invention also provides a converter cabinet, which adopts the aforementioned electrical cabinet.

The present invention also provides an energy storage cabinet, which adopts the aforementioned electrical cabinet.

The beneficial effects of the present invention and the unique principles upon which it is based are set forth below. The electrical cabinet provided by the present invention reasonably designs the air-cooling ring according to the application requirements of the C4 grade atmospheric corrosion environment, such as the high temperature, high humidity and high corrosion environment in coastal areas, inland high-humidity areas and inland chemical industry areas. control plan. The electrical cabinet adopts a partition design. According to the characteristics of different devices, it is installed in different cabinets, and different environmental control and anti-corrosion measures are adopted. Specifically, the electrical cabinet installs a module that contains a large number of components and is difficult to perform anti-corrosion strengthening operations on itself in a closed cabinet, strengthens the sealing and anti-corrosion of the cabinet, and introduces an air conditioner to achieve forced air Cold, while meeting the cooling requirements in the cabinet, it protects the components in the cabinet from moisture or corrosion. For the devices and/or modules that are easy to do anti-corrosion enhancement, the method of external ventilation and heat exchange is adopted, that is, such devices and/or modules are installed in a cabinet provided with external ventilation openings, and the devices and/or modules are Additional anti-corrosion enhancement is carried out. When the heat dissipation of this type of device is high, a fan can be further installed to achieve forced air volume, so that it can meet the application requirements of high temperature, high humidity and high corrosion environment while meeting the heat dissipation requirements of high loss devices. In addition, the electrical cabinet can further adjust the environmental control strategy at any time according to the real-time temperature and humidity inside the cabinet through the monitoring module and the control module. The electrical cabinet provided by the invention maintains the forced air cooling method and has strong heat dissipation capacity, and can meet the application requirements of C4 atmospheric corrosive environments such as coastal areas, inland high-humidity areas and inland chemical industry areas, and expand the product application environment. Compared with the liquid cooling method, the cost of the air cooling method is greatly reduced, the product structure is simpler, the installation is convenient, and the operation and maintenance difficulty is low.

Description of drawings

In order to further clarify the above and other advantages and features of the various embodiments of the present invention, a more specific description of the various embodiments of the present invention will be presented with reference to the accompanying drawings. It is understood that these drawings depict only typical embodiments of the invention and are therefore not to be considered limiting of its scope. In the drawings, the same or corresponding parts will be denoted by the same or similar numerals for clarity.

FIG. 1 shows a schematic diagram of the front structure of an electrical cabinet according to an embodiment of the present invention;

FIG. 2 shows a schematic view of the reverse structure of an electrical cabinet according to an embodiment of the present invention; and

FIG. 3 shows a schematic diagram of the bottom surface structure of an electrical cabinet according to an embodiment of the present invention.

Detailed ways

In the following description, the present invention is described with reference to various examples. However, one skilled in the art will recognize that the various embodiments may be practiced without one or more of the specific details or with other alternative and/or additional methods, materials or components. In other instances, well-known structures, materials, or operations are not shown or described in detail so as not to obscure the concepts of the present invention. Similarly, for purposes of explanation, specific quantities, materials and configurations are set forth in order to provide a thorough understanding of the embodiments of the invention. However, the invention is not limited to these specific details. Furthermore, it is to be understood that the various embodiments shown in the drawings are illustrative representations and have not necessarily been drawn to correct scale.

In this specification, reference to "one embodiment" or "the embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. The appearances of the phrase "in one embodiment" in various places in this specification are not necessarily all referring to the same embodiment.

In coastal areas, inland high-humidity areas, and inland chemical areas and other high-temperature, high-humidity, and highly corrosive application environments, electrical cabinets usually need to use corrosion-resistant materials for enhanced corrosion protection, and the cabinets are usually sealed to avoid moisture. When the loss of components in the cabinet is low, natural air cooling can be used for heat dissipation. Specifically, heat dissipation fins are installed on the surface of the cabinet to conduct the heat in the cabinet to the external environment by natural heat exchange. Once the loss of the components in the cabinet is high, the air cooling method as mentioned above will be difficult to meet the heat dissipation requirements. At this time, the liquid cooling method is often chosen, but the liquid cooling method is expensive, complicated in structure, installation and operation and maintenance. Not easy, and there is a risk of leakage.

In order to maintain the forced air cooling method in the high temperature, high humidity and high corrosion application environment, the present invention provides an electrical cabinet, which adopts a partition design, and includes modules with a large number of components and difficult to carry out anti-corrosion strengthening operations for themselves. Installed in a closed cabinet, the cabinet is sealed and strengthened, and anti-corrosion is strengthened, and an air conditioner is introduced to achieve forced air cooling. While meeting the cooling requirements in the cabinet, it protects the components in the cabinet from moisture or corrosion. For devices and/or modules that are easy to perform anti-corrosion enhancement, external ventilation and heat exchange are adopted. Such devices and/or modules are installed in a cabinet provided with external ventilation openings, and the devices and/or modules are installed in a cabinet with external ventilation openings. The module carries out additional anti-corrosion reinforcement. When the heat dissipation of this type of device is high, a fan can be further installed to achieve forced air cooling, so as to meet the heat dissipation requirements of high-loss devices and meet the application of high temperature, high humidity and high corrosion environment. Require. In addition, the electrical cabinet can further adjust the environmental control strategy at any time according to the real-time temperature and humidity inside the cabinet through the monitoring module and the control module. The electrical cabinet provided by the invention maintains the forced air cooling method and has strong heat dissipation capacity, and can meet the application requirements of C4 atmospheric corrosive environments such as coastal areas, inland high-humidity areas and inland chemical industry areas, and expand the product application environment. Compared with the liquid cooling method, the cost of the air cooling method is greatly reduced, the product structure is simpler, the installation is convenient, and the operation and maintenance difficulty is low.

The solution of the present invention will be further described below in conjunction with the accompanying drawings.

1 to 3 respectively show the front, back and bottom structural schematic diagrams of an electrical cabinet according to an embodiment of the present invention. As shown in the figure, the electrical cabinet includes a plurality of cabinets, among which, the cabinets 101 and 102 that only use air conditioners for environmental control are denoted as the first cabinets, and the cabinets adopt a mixed environment control method of air conditioners and external ventilation and heat exchange. 103 is recorded as the second cabinet. It should be understood that, in other embodiments of the present invention, the first cabinet and/or the second cabinet may also include more or less cabinets.

As shown in the figure, the first cabinet includes a first air conditioner 111, and the first air conditioner is used to perform environmental control on the interior of the first cabinet, specifically, to perform temperature and/or humidity control. As mentioned above, in the embodiment of the present invention, the first cabinet is mainly used for installing devices that are not suitable for anti-corrosion reinforcement, and modules containing many devices. For such devices and/or modules, it is difficult and/or costly to perform anti-corrosion enhancement. Therefore, in order to simplify the process and reduce costs, in the embodiments of the present invention, such devices and/or modules are It is installed in the first cabinet, and the environment is controlled by the first air conditioner 111 . In an embodiment of the present invention, in order to adapt to the application environment of the C4 level, the first cabinet is designed with enhanced sealing and anti-corrosion. Specifically, the sealing enhancement includes but is not limited to: adopting full welding of splicing seams, adopting sealing strips for door panels, etc. In the anti-corrosion enhancement design, for example, a first anti-corrosion layer may be provided on the surface of the cabinet body of the first cabinet, wherein the anti-corrosion level of the first anti-corrosion layer is not lower than the C4 level.

The second cabinet as a whole also adopts the design of sealing enhancement and anti-corrosion enhancement. Specifically, the sealing enhancement includes but is not limited to: adopting full welding of splicing seams, adopting sealing strips for door panels, and the like. In the anti-corrosion enhancement design, for example, a second anti-corrosion layer may be provided on the surface of the cabinet body of the second cabinet, wherein the anti-corrosion level of the second anti-corrosion layer is not lower than the C4 level. Due to the high heat dissipation requirements of some devices, such as reactors, IGBTs, etc., it may be difficult for air conditioners to meet their heat dissipation requirements. Therefore, when some devices with high heat dissipation requirements are easy to carry out anti-corrosion enhancement design, they can be installed in External ventilation and heat dissipation are carried out in an independent cavity. Based on this, the cabinet body of the second cabinet can be divided into a plurality of cavities, wherein the cavity designed for sealing is denoted as the first cavity, and the cavity provided with the external ventilation port is denoted as the second cavity. It should be understood that, the first cavity may be one or more, and the second cavity may also be one or more. In an embodiment of the present invention, each of the first cavity, the second cavity, and the first cavity and the second cavity can be isolated by a partition plate, and respective cabinet doors are respectively provided. Wherein, through holes may be provided on the separator to facilitate electrical and/or mechanical connection between the first cavity and the devices inside the second cavity. Since the second cavity is mainly used to install devices with high heat dissipation requirements and/or easy to be reinforced with corrosion protection, in an embodiment of the present invention, the device installation density of the second cavity is smaller than that of the The device installation density of the first cavity, as a whole, the device installation density of the second cabinet is smaller than the device installation density of the first cabinet.

As shown in the figure, the first cavity includes a second air conditioner 131, and the second air conditioner is used to perform environmental control on the inside of the first cavity, specifically, to perform temperature and/or humidity control. Similar to the first cabinet, in the embodiment of the present invention, the devices and/or modules installed in the first cavity are also devices that are not suitable for anti-corrosion enhancement, and only perform environmental control through the second air conditioner.

As shown in the figure, the second cavity is provided with a first through hole 132, and the first through hole 132 is used for external ventilation and heat exchange for the inside of the second cavity. The devices in the second cavity are exposed to the external environment, therefore, additional anti-corrosion designs are required for themselves. In an embodiment of the present invention, a third anti-corrosion layer is provided on the surface of the device. In order to adapt to the application environment of high temperature, high humidity and high corrosion, the anti-corrosion level of the third anti-corrosion layer is not lower than the C4 level. . In addition, in an embodiment of the present invention, when the heat generation or the cooling air volume of the device is higher than or equal to a specified threshold, a fan is further introduced to perform forced air cooling and heat dissipation. As shown in the figure, the fan 133 is arranged at the first through hole 132, and at the same time, one or more air inlets 134 are arranged on the second cavity, so that the inside of the second cavity can be form air ducts. In an embodiment of the present invention, the specified threshold is: the cooling air volume is greater than 3000 m ³ /h or the calorific value is greater than 15 KW.

In an embodiment of the present invention, the first air conditioner, the second air conditioner and the fan all adopt a modular design, and the number of them can be adapted according to the calorific value or cooling air volume demand of the devices inside the first cabinet and the second cabinet increase or decrease.

In order to achieve precise control of the internal environment of the electrical cabinet, in an embodiment of the present invention, a control module is also arranged in the electrical cabinet to adjust the working modes of the first air conditioner, the second air conditioner and the electric fan in real time and/or state to achieve temperature control and humidity control of the interior of the electrical cabinet. In yet another embodiment of the present invention, a monitoring module is disposed inside the first cabinet and the second cabinet, which can measure the internal temperature and humidity of the first cabinet and the second cabinet in real time. The monitoring module includes, but is not limited to, a temperature sensor, a humidity sensor, and the like.

In an embodiment of the present invention, the temperature control includes heating control and heat dissipation control. The heating control refers to controlling the first air conditioner and/or the second air conditioner to enter the heating mode when the real-time temperature in the cabinet is lower than a specified value, so that the temperature in the cabinet rises to the appropriate working range of each device, thereby satisfying the Low temperature environment application requirements. Heat dissipation control refers to controlling the first air conditioner and/or the second air conditioner to enter the cooling mode and/or adjusting the state of the fan when each device enters the normal working state and begins to dissipate heat, or the ambient temperature is too high. The temperature in the cabinet is kept within the appropriate working range of each device.

In an embodiment of the present invention, the first air conditioner and/or the second air conditioner includes a variety of dehumidification modes, and can be based on the real-time humidity value in the cabinet and/or the temperature difference inside and outside the cabinet and/or the electrical The working state of the cabinet can be adjusted to different dehumidification modes. The dehumidification mode may include, for example, a normal dehumidification mode, a standby dehumidification mode, a forced dehumidification mode, a dew condensation protection mode, and the like.

The electrical cabinet provided by the present invention can be widely used in various products that need to be installed in a high-humidity C4 atmospheric corrosive environment, such as frequency conversion cabinets, converter cabinets, energy storage cabinets and the like in the field of wind power generation. Through the environmental control zoning design, targeted sealing and anti-corrosion strengthening is carried out on the cabinet, and air conditioners are introduced to realize forced air cooling, low-temperature heating and dehumidification in the cabinet, so as to realize the control of the internal environment of the electrical cabinet. For individual high-loss devices, forced air cooling is used, fans are introduced, and special air ducts are set up to meet their high-volume heat dissipation requirements; at the same time, additional anti-corrosion reinforcement is performed on these high-loss devices that are connected to the external environment. Through the above design, firstly, the electrical cabinet can meet the application requirements of the high-humidity C4 atmospheric corrosion environment in coastal areas, and secondly, the good working environment conditions of each device in the electrical cabinet are ensured, so that each device operates within the appropriate temperature and humidity range.

While various embodiments of the present invention have been described above, it should be understood that they have been presented by way of example only, and not limitation. It will be apparent to those skilled in the relevant art that various combinations, modifications and changes can be made therein without departing from the spirit and scope of the present invention. Therefore, the breadth and scope of the invention disclosed herein should not be limited by the above-disclosed exemplary embodiments, but should be defined only in accordance with the appended claims and their equivalents.

Claims (17)

1. an electrical cabinet, is characterized in that, comprises: a first cabinet including a first air conditioner configured to temper temperature and/or dehumidify the interior of the first cabinet; and Second cabinet, including: a first cavity including a second air conditioner configured to temperature and/or dehumidify the interior of the first cavity; and The surface of the second cavity is provided with a first through hole, and the first through hole is configured to perform external ventilation and heat exchange for the inside of the second cavity. 2 . The electrical cabinet according to claim 1 , wherein the device installation density of the first cabinet is greater than the device installation density of the second cabinet. 3 . 3 . The electrical cabinet according to claim 1 , wherein the device installation density of the first cavity is greater than the device installation density of the second cavity. 4 . 4 . The electrical cabinet according to claim 1 , wherein the second cavity is configured to install a device with a calorific value or a cooling air volume higher than or equal to a specified threshold, and a third anti-corrosion layer is provided on the surface. 5 . 5 . The electrical cabinet according to claim 4 , wherein the anti-corrosion level of the third anti-corrosion layer is not lower than the C4 level. 6 . 6 . The electrical cabinet according to claim 1 , wherein the first cabinet comprises at least one cabinet body, the cabinet body adopts a sealed design, and the surface is provided with a first anti-corrosion layer. 7 . 7. The electrical cabinet according to claim 6, wherein the anti-corrosion grade of the first anti-corrosion layer is not lower than the C4 grade. 8 . The electrical cabinet according to claim 1 , wherein the second cabinet comprises at least one cabinet body, and the surface of the cabinet body is provided with a second anti-corrosion layer. 9 . 9 . The electrical cabinet according to claim 8 , wherein the anti-corrosion level of the second anti-corrosion layer is not lower than the C4 level. 10 . 10. The electrical cabinet according to claim 1, wherein the first cavity adopts a sealed design. 11 . The electrical cabinet according to claim 4 , wherein the electrical cabinet further comprises a fan, the fan is disposed at the first through hole, and the second cavity further comprises an air inlet, which is 11 . An air duct is arranged between the fan and the fan. 12 . The electrical cabinet according to claim 11 , wherein the number of the first air conditioner, the second air conditioner and the fan is set according to the calorific value or the cooling air volume requirement of the devices inside the first cabinet and the second cabinet. 13 . . 13 . The electrical cabinet of claim 1 , further comprising a monitoring module, which is disposed inside the first cabinet and the second cabinet and configured to measure the first cabinet and the second cabinet in real time. 14 . The internal temperature and humidity of the cabinet. 14. The electrical cabinet of claim 1, further comprising a control module configured to control the first air conditioner and the second air conditioner according to the temperature and humidity inside the first cabinet and the second cabinet The working mode of the air conditioner. 15. A frequency conversion cabinet, characterized in that it comprises the electrical cabinet according to any one of claims 1 to 14. 16. A converter cabinet, characterized by comprising the electrical cabinet according to any one of claims 1 to 14. 17. An energy storage cabinet, characterized by comprising the electrical cabinet according to any one of claims 1 to 14.

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