CN205491634U - A heat abstractor and switch board for big power control cabinet - Google Patents

Abstract

The application discloses be used for the heat abstractor of big power control cabinet, including control cabinet, control cabinet is sealed airtight electric apparatus room and the gas flow room that keeps apart each other at inside the partition through high heat -conducting plate, and high heat -conducting plate is used for the fixed electrical equipment who is located airtight electric apparatus room towards one side face of airtight electric apparatus room, the gas flow room is provided with the gaseous ion exchange assembly who is used for going on gaseous exchange with the control cabinet outside. Among this heat abstractor, the heat of electrical equipment production mostly directly transmits to gas flow indoorly through high heat -conducting plate, and passing through gases ion exchange assembly exchanges with the external world the indoor gas of gas flow to it is outside to distribute control cabinet with the heat, and the heat in the airtight electric apparatus room of the few part of surplus distributes away through control cabinet. Consequently, the interior temperature greatly reduced of airtight electric apparatus room and electrical equipment has improved the radiating efficiency. Simultaneously, electrical equipment installs in airtight electric apparatus room, can protect electrical equipment not receive external environment's damage.

Description

A cooling device and a control cabinet for a high-power control cabinet

technical field

The utility model relates to the technical field of electrical control cabinets, in particular to a heat dissipation device for high-power control cabinets. It also relates to a control cabinet using the cooling device.

Background technique

In production practice, many control cabinets equipped with high-power semiconductor devices are placed outdoors. In order to protect the control circuits and semiconductor components in the control cabinet from outdoor rain, dust, and corrosive gases, the control cabinet must have Very high degree of protection, such as IP54 or higher. This means that the sealing of the control cabinet must be good to prevent water, dust, etc. from entering. But now more and more advanced control cabinets use high-power semiconductor devices (such as IGBT modules) as switches, and work at higher switching frequencies. When these high-power semiconductor devices work at high frequencies, they consume a lot of power and generate a lot of heat. If the heat cannot be dissipated in time, the devices will be damaged. Therefore, high-power control cabinets are required to be able to dissipate heat better. Therefore, the heat dissipation of the control cabinet and the airtight protection of the control cabinet constitute a pair of contradictions. It is difficult to balance the problem of ensuring the airtight protection of the control cabinet while ensuring the heat dissipation of the control cabinet.

At present, the most typical and effective solution is to use a heat exchanger. Figure 1 is a schematic diagram of a heat dissipation method for a high-power control cabinet in the prior art, that is, one or more air The heat exchanger 04 "exchanges" the heat generated by the electrical equipment 02 in the control cabinet 01 to the outside of the control cabinet 01 through the air heat exchanger 04, and the air heat exchanger 04 is air-isolated, that is, the control cabinet 01 The air inside and the air outside the control cabinet 01 are isolated, and a fan 03 is generally installed on the top of the cabinet to stir the air in the control cabinet 01. In this way, both airtightness and heat dissipation can be realized, which effectively solves the contradiction that the high-power control cabinet must be airtight and fully radiate heat when it is used outdoors.

However, the disadvantage of this method is that the heat emitted by the power device is first dissipated to the inside of the control cabinet 01 to heat the air inside the control cabinet 01, and then the heat of the internal air is transferred to the control cabinet by the air heat exchanger 04 In the environment outside the body 01, the air inside the control cabinet 01 is acting as a heat transfer medium. Due to the poor thermal conductivity of air as a heat transfer medium and the large thermal resistance, the heat generated by the power device cannot be dissipated to the outside of the control cabinet 01 in time, and the heat is easily accumulated inside the power device and the control cabinet 01, resulting in power The device is damaged by high temperature.

To sum up, how to ensure the airtight protection of the high-power control cabinet and effectively dissipate heat has become an urgent problem to be solved by those skilled in the art.

Utility model content

In view of this, the purpose of this utility model is to provide a heat dissipation device for a high-power control cabinet, so as to ensure the airtight protection of the high-power control cabinet and improve the heat dissipation efficiency of the high-power control cabinet.

Another object of the present invention is to provide a control cabinet using the heat dissipation device, so as to ensure the airtight protection of the control cabinet and improve the heat dissipation efficiency of the control cabinet.

In order to achieve the above object, the utility model provides the following technical solutions:

A heat dissipation device for a high-power control cabinet, comprising a control cabinet body, the interior of the control cabinet body is divided into a closed electrical room and a gas circulation room that are sealed and isolated from each other by a high heat conduction plate, and the high heat conduction plate faces the airtight One side of the electrical room is used to fix the electrical equipment located in the airtight electrical room; the gas circulation room is provided with a gas exchange component for gas exchange with the outside of the control cabinet.

Preferably, in the above-mentioned heat dissipation device, a circulation fan arranged in the sealed electrical room for agitating the gas flow in the sealed electrical room is further included.

Preferably, in the above heat dissipation device, the circulation fan is installed on the inner ceiling of the airtight electrical room.

Preferably, in the above heat dissipation device, the gas exchange assembly includes an air inlet fan and an air outlet fan arranged on the wall of the gas circulation chamber and communicating with the inside of the gas circulation chamber and the outside.

Preferably, in the above heat dissipation device, the air intake fan is arranged on the lower chamber wall of the gas circulation chamber; the air outlet fan is arranged on the upper chamber wall of the gas circulation chamber.

Preferably, in the above heat dissipation device, the high thermal conductivity plate is a copper plate, an aluminum plate or a heat pipe.

Preferably, in the above heat dissipation device, first heat dissipation fins are provided on the side of the high thermal conductivity plate facing the gas circulation chamber.

Preferably, in the above heat dissipation device, the surface of the first heat dissipation fin is coated with an oxide film.

Preferably, in the above heat dissipation device, second heat dissipation fins are arranged on the outer wall of the control cabinet.

The utility model also provides a control cabinet, including electrical equipment, and also includes the heat dissipation device as described in any one of the above, the electrical equipment is located in the airtight electrical room of the heat dissipation device and is fixed on the height of the heat dissipation device. The heat conduction plate faces a side plate surface of the airtight electrical room.

Compared with the prior art, the beneficial effects of the utility model are:

In the heat dissipation device used in the high-power control cabinet provided by the utility model, the inside of the control cabinet is separated into a sealed electrical room and a gas circulation room that are sealed and isolated from each other through a high heat conduction plate. The sealed electrical room is used to accommodate electrical equipment, and the high The side surface of the heat conduction plate facing the airtight electrical room is used for fixing electrical equipment, and the gas circulation room is provided with a gas exchange component for exchanging gas with the outside of the control cabinet. When working, most of the heat generated by the electrical equipment is directly transferred to the gas circulation chamber through the high heat conduction plate, and the gas in the gas circulation chamber is exchanged with the outside world through the gas exchange component, thereby dissipating the heat of the electrical equipment to the outside of the control cabinet. The heat in the remaining small part of the sealed electrical room is dissipated through the control cabinet. Because the electrical equipment is directly connected with the high heat conduction plate, the heat can quickly spread out of the airtight electrical room, so the temperature in the airtight electrical room and electrical equipment is greatly reduced, and the electrical equipment will not be damaged. Compared with the heat dissipation method of the heat exchanger, the heat dissipation device improves the heat dissipation efficiency. At the same time, the electrical equipment is sealed in the airtight electrical room, which can protect the electrical equipment from being damaged by the external environment.

Because the control cabinet provided by the utility model adopts the heat dissipation device in the utility model, it has the same beneficial effect as above, so it will not be repeated here.

Description of drawings

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 accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description It is only an embodiment of the utility model, and those skilled in the art can also obtain other drawings according to the provided drawings without creative work.

Fig. 1 is a schematic diagram of a heat dissipation method of a high-power control cabinet in the prior art;

Fig. 2 is a schematic structural diagram of a heat dissipation device for a high-power control cabinet provided by an embodiment of the present invention.

In Figure 1 and Figure 2, 01 is the control cabinet, 02 is the electrical equipment, 03 is the fan, and 04 is the air heat exchanger;

1 is the control cabinet, 2 is the circulating fan, 3 is the airtight electrical room, 4 is the electrical equipment, 5 is the high thermal conductivity plate, 501 is the installation surface, 502 is the heat dissipation surface, 6 is the gas circulation room, 7 is the intake fan, 8 is an air outlet fan;

The solid arrows in the figure indicate the direction of heat diffusion, and the boxed arrows indicate the direction of gas flow.

detailed description

The core of the utility model is to provide a heat dissipation device for a high-power control cabinet, which can improve the heat dissipation efficiency of the high-power control cabinet while ensuring the airtight protection of the high-power control cabinet.

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Please refer to Fig. 2, the embodiment of the utility model provides a heat dissipation device for a high-power control cabinet, hereinafter referred to as a heat dissipation device, which includes a control cabinet 1, a high thermal conductivity plate 5 and a gas exchange assembly, wherein the control cabinet 1 The interior is divided into a sealed electrical room 3 and a gas circulation room 6 that are sealed and isolated from each other by a high thermal conductivity plate 5. The sealed electrical room 3 is used to install electrical equipment 4, and the side of the high thermal conductive plate 5 facing the sealed electrical room 3 is used for installation. The surface 501, the installation surface 501 is used to fix the electrical equipment 4, the side plate surface of the high thermal conductivity plate 5 facing the gas circulation chamber 6 is the heat dissipation surface 502; External gas exchange.

The working principle of the above-mentioned heat dissipation device is: most of the heat generated by the electrical equipment 4 located in the sealed electrical room 3 is directly transferred to the gas circulation chamber 6 through the high thermal conductivity plate 5 that is in contact with it, and the gas is circulated through the gas exchange component. The gas in the room 6 exchanges and circulates with the outside world, thereby dissipating the heat of the electrical equipment 4 to the outside of the control cabinet 1 , and the remaining heat in the sealed electrical room 3 is dissipated through the wall of the control cabinet 1 . Since the electrical equipment 4 is directly connected with the high thermal conductivity plate 5, the heat of the electrical equipment 4 can quickly diffuse out of the airtight electrical room 3, and the temperature in the airtight electrical room 3 and the electrical equipment 4 is greatly reduced, and the electrical equipment 4 will not be damaged. Compared with the existing method of dissipating heat through an air heat exchanger, the heat dissipating device improves the heat dissipation efficiency. At the same time, the electrical equipment 4 is sealed in the airtight electrical equipment room 3, which can protect the electrical equipment 4 from being damaged by the external environment. The purpose of improving the heat dissipation efficiency of the high-power control cabinet while ensuring the airtight protection of the high-power control cabinet is achieved.

As shown in Figure 2, further, in this embodiment, the heat dissipation device also includes a circulation fan 2 arranged inside the sealed electrical room 3, which is used to stir the gas flow in the sealed electrical room 3, thereby speeding up the airflow in the sealed electrical room 3. The heat of the control cabinet 1 is dissipated to the outside.

As an optimization, the circulation fan 2 is installed on the inner top plate of the airtight electrical room 3, so that the gas circulation effect is better. Of course, the circulation fan 2 can also be installed in other positions inside the airtight electrical appliance room 3, as long as the gas in the airtight electrical appliance room can circulate.

As shown in FIG. 2 , this embodiment provides a specific gas exchange assembly, which includes an air inlet fan 7 and an air outlet fan 8 arranged on the wall of the gas circulation chamber 6 and communicating with the inside and outside of the gas circulation chamber 6 . Through the air intake fan 7 and the air outlet fan 8, the gas circulation chamber 6 and the outside world form a gas circulation channel, and the heat of the high thermal conductivity plate 5 is taken out of the control cabinet 1 by the air flow through the circulation, so as to achieve the purpose of rapid heat dissipation.

As an optimization, the air intake fan 7 is arranged on the lower chamber wall of the gas circulation chamber 6 ; the outlet fan 8 is arranged on the upper chamber wall of the gas circulation chamber 6 . Let the cold air enter from the bottom, and the air after heat exchange is discharged from the top, so the heat exchange effect is better. Of course, the air intake fan 7 and the air outlet fan 8 can also be arranged in other positions of the gas circulation chamber 6, as long as the air circulation and heat dissipation can be carried out between the gas circulation chamber and the outside.

Of course, the gas exchange assembly can also be an air intake fan 7 and an air outlet, and the air outlet is arranged on the wall of the gas circulation chamber 6, and the gas in the gas circulation chamber 6 is pushed out only by the blowing effect of the air intake fan 7. tuyere. Or the gas exchange component is an air outlet fan 8 and an air inlet. Through the suction of the air outlet fan 8, the gas is sucked into the gas circulation chamber 6 from the air inlet and exhausted by suction. Or the gas exchange component is an air inlet and an air outlet, and the gas flows naturally from the air inlet through the gas circulation chamber 6 to the air outlet to form a natural convection cycle of the gas, which is suitable for a control cabinet with relatively small heat generation. An exchange of gas between the gas flow chamber 6 and the environment can likewise be achieved.

In this embodiment, the high thermal conductivity plate 5 is preferably a copper plate, an aluminum plate or a heat pipe, which has high thermal conductivity and can accelerate the heat transfer of the electrical equipment 4 to the outside.

Further, in order to improve heat dissipation efficiency, first heat dissipation fins are provided on the heat dissipation surface 502 of the high heat conduction plate 5 facing the gas circulation chamber 6 in this embodiment. The fin-shaped heat dissipation surface increases the heat dissipation area, thereby accelerating the heat dissipation of the electrical equipment 4 .

Furthermore, the surface of the first cooling fin is coated with an anti-corrosion oxide film to increase the service life.

In order to further accelerate the heat dissipation of the control cabinet body 1, the outer wall surface of the control cabinet body 1 in this embodiment is provided with a second heat dissipation fin, and the heat dissipation area is increased by the outer wall surface of the finned control cabinet body 1, thereby improving cooling efficiency.

The embodiment of the utility model also provides a control cabinet, including electrical equipment 4 and a heat dissipation device, wherein the heat dissipation device is the heat dissipation device described in all the above embodiments, and the electrical equipment 4 is located in the airtight electrical room 3 of the heat dissipation device and fixed The high thermal conductivity plate 5 of the heat sink is installed on the side plate facing the airtight electrical room 3 , that is, installed on the mounting surface 501 .

The heat dissipation device used in the control cabinet in the utility model has high heat dissipation efficiency, can ensure the normal operation of the electrical equipment 4, and at the same time, has good sealing performance, can protect the electrical equipment 4 from being damaged by the external environment, has a high protection level, and is suitable for for high power devices.

Each embodiment in this specification is described in a progressive manner, each embodiment focuses on the difference from other embodiments, and the same and similar parts of each embodiment can be referred to each other.

The above description of the disclosed embodiments enables those skilled in the art to realize or use the utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A heat dissipation device for a high-power control cabinet, comprising a control cabinet (1), characterized in that the inside of the control cabinet (1) is separated into mutually sealed and isolated airtight electrical appliances by a high heat conduction plate (5) chamber (3) and gas circulation chamber (6), the side plate surface of the high thermal conductivity plate (5) facing the airtight electrical chamber (3) is used to fix the electrical equipment located in the airtight electrical chamber (3) (4); The gas circulation chamber (6) is provided with a gas exchange component for exchanging gas with the outside of the control cabinet (1). 2. The heat dissipation device according to claim 1, further comprising a circulation fan (2) arranged in the sealed electrical room (3) for stirring the gas flow in the sealed electrical room (3) . 3. The heat dissipation device according to claim 2, characterized in that, the circulation fan (2) is installed on the inner top plate of the airtight electrical room (3). 4. The heat dissipation device according to claim 1, characterized in that, the gas exchange assembly includes a wall that is arranged on the wall of the gas circulation chamber (6) and communicates with the inside and outside of the gas circulation chamber (6). Inlet fan (7) and outlet fan (8). 5. The heat dissipation device according to claim 4, characterized in that, the air intake fan (7) is arranged on the lower chamber wall of the gas circulation chamber (6); the air outlet fan (8) is arranged on the On the upper chamber wall of the gas circulation chamber (6). 6. The heat dissipation device according to claim 1, characterized in that, the high thermal conductivity plate (5) is a copper plate, an aluminum plate or a heat pipe. 7. The heat dissipation device according to claim 1, characterized in that first heat dissipation fins are provided on the side plate surface of the high thermal conductivity plate (5) facing the gas circulation chamber (6). 8. The heat dissipation device according to claim 7, wherein the surface of the first heat dissipation fin is coated with an oxide film. 9. The heat dissipation device according to claim 1, characterized in that, the outer wall of the control cabinet (1) is provided with second heat dissipation fins. 10. A control cabinet, comprising electrical equipment (4), characterized in that it also includes the heat dissipation device according to any one of claims 1-9, the electrical equipment (4) is located in the airtight electrical appliance of the heat dissipation device The high thermal conductivity plate (5) in the chamber (3) and fixed on the heat sink faces the side plate surface of the airtight electrical chamber (3).