WO2023010977A1

WO2023010977A1 - Cabinet and pressure relief method

Info

Publication number: WO2023010977A1
Application number: PCT/CN2022/096153
Authority: WO
Inventors: 郭俊; 王晓虎; 朱其姚
Original assignee: 阳光电源股份有限公司
Priority date: 2021-08-06
Filing date: 2022-05-31
Publication date: 2023-02-09
Also published as: CN113488875A

Abstract

The present invention relates to the technical field of power equipment. Disclosed are a cabinet and a pressure relief method. The cabinet comprises a cabinet body; at least two accommodating cavities are provided in the cabinet body; each accommodating cavity is provided with a pressure relief port; the gas in each accommodating cavity can be discharged through the corresponding pressure relief port. The cabinet can separate multiple electrical components to prevent the multiple electrical components from affecting each other when working. In addition, multiple accommodating cavities can also satisfy the protection requirements of different electrical components, and have a good protection effect on the electrical components.

Description

A kind of cabinet and pressure relief method

This application claims the priority of the Chinese patent application with the application number 202110900309.6 and the title of the invention "A Cabinet and Pressure Relief Method" submitted to the China Patent Office on August 6, 2021, the entire contents of which are incorporated by reference in this application .

technical field

The invention relates to the technical field of electric equipment, in particular to a cabinet and a pressure relief method.

Background technique

During the working process of the cabinet, the electrical components inside the cabinet will generate arcing due to circuit aging, operation errors, overvoltage and other reasons. Discharge will cause the cabinet to burst and easily cause injury to the operator. Therefore, a pressure relief port is often provided on the top or bottom of the cabinet so that the high-pressure gas generated by the arc can be discharged through the pressure relief port. Since there are usually multiple electrical components in the cabinet, on the one hand, multiple electrical components may affect each other during work, and on the other hand, it is difficult to meet the protection requirements of different electrical components.

Contents of the invention

An object of the present invention is to provide a cabinet that can separate multiple electrical components, prevent the multiple electrical components from influencing each other during operation, and meet the protection requirements of different electrical components.

For this reason, the present invention adopts following technical scheme:

A cabinet, the cabinet includes a cabinet body, the cabinet is provided with at least two accommodation chambers, each of the accommodation chambers is correspondingly provided with a pressure relief port, and the gas in each of the accommodation chambers can be controlled by the corresponding of the pressure relief port to discharge.

As a preferred solution of the cabinet, at least two of the accommodation chambers are arranged independently of each other, and the pressure relief ports corresponding to the mutually independent accommodation chambers are all opened on the cabinet body.

As a preferred solution of the cabinet, the accommodating cavity includes a first accommodating cavity and a second accommodating cavity, and the first accommodating cavity is located inside the second accommodating cavity.

As a preferred solution of the cabinet, electrical components are accommodated in the accommodating cavity, and the pressure relief port is arranged close to the arc-prone part of the electrical components.

As a preferred scheme of the cabinet, at least one of the pressure relief openings is opened on the side wall of the cabinet, and the cabinet further includes a protection member, and the protection member is a shell with at least one end open in the vertical direction, The protection member can be buckled outside the pressure relief port on the side wall of the cabinet.

As a preferred scheme of the cabinet, the cabinet further includes a pressure relief plate corresponding to the pressure relief ports one by one, the first end of the pressure relief plate is rotatably connected to the cavity wall of the accommodating cavity, and the pressure relief plate The second end can be fastened to the cavity wall of the accommodating cavity from the outside of the accommodating cavity to block the pressure relief port.

As a preferred solution of the cabinet, the cavity wall of the accommodating cavity is provided with a magnetic piece corresponding to the pressure relief plate one by one, and the second end of the pressure relief plate can be buckled under the magnetic adsorption of the magnetic piece fit on the cavity wall of the accommodating cavity.

As a preferred solution of the cabinet, the magnetic component is an electromagnet.

As a preferred solution of the cabinet, an arc sensor and a controller are further provided in the accommodating cavity, and the controller is electrically connected to the arc sensor and the electromagnet respectively.

As a preferred solution of the cabinet, a temperature sensor is further provided in the accommodating cavity, and the temperature sensor is electrically connected to the controller.

As a preferred solution of the cabinet, an alarm is also provided in the accommodating cavity, and the alarm is electrically connected to the controller.

As a preferred solution of the cabinet, the side wall of the cabinet is provided with an opening, and the cabinet also includes a cabinet door, which can be locked on the cabinet body and seal the opening. The locking strength of the door is greater than the adsorption strength between each of the magnetic parts and the corresponding pressure relief plate.

Beneficial effects of the present invention:

The present invention proposes a cabinet, the cabinet includes at least two accommodation chambers, which can separate multiple electrical components and prevent multiple electrical components from influencing each other during work. Protection requirements, good protection effect on electrical components.

Another object of the present invention is to provide a pressure relief method, which can release the pressure of each containing cavity separately, and can ensure the sealing of the containing cavity when the pressure is not released.

For this reason, the present invention adopts following technical scheme:

A pressure relief method for a cabinet, the cabinet includes a cabinet body, the cabinet is provided with at least two accommodation chambers, each of the accommodation chambers corresponds to a pressure relief port, the pressure relief method includes the following steps :

When the accommodating chamber is depressurized, the corresponding pressure relief port is opened, and the gas inside the accommodating chamber can be discharged through the corresponding pressure relief port;

When the accommodating chamber is not depressurized, the corresponding decompression port is closed.

As a preferred solution of the pressure relief method, the cabinet body is provided with an opening, and the cabinet also includes a cabinet door for blocking the opening, and the pressure relief method also includes:

When the pressure relief port cannot meet the pressure relief requirements of the corresponding accommodating chamber, the cabinet door is opened for pressure relief.

Beneficial effects of the present invention:

The invention proposes a pressure relief method, which can respectively perform pressure relief on each accommodation cavity, and can ensure the sealing of the accommodation cavity when the pressure is not relieved, so as to ensure the protection effect on the electrical components inside the cabinet.

Description of drawings

Fig. 1 is a schematic structural diagram of a cabinet provided by an embodiment of the present invention;

FIG. 2 is a first perspective view of a cabinet provided by an embodiment of the present invention;

Fig. 3 is a second perspective view of the cabinet provided by the embodiment of the present invention;

Fig. 4 is a schematic structural view of a cabinet with protective parts provided by an embodiment of the present invention;

Fig. 5 is a perspective view of a cabinet with a protective member provided by an embodiment of the present invention;

Fig. 6 is a pressure change curve of the cabinet provided by the embodiment of the present invention when the pressure is released.

In the picture:

1-cabinet; 11-partition; 12-accommodating cavity; 121-first accommodating cavity; 122-second accommodating cavity; 13-pressure relief port;

2-protection part; 3-pressure relief plate; 4-magnetic part; 5-arc sensor; 6-controller; 7-cabinet door;

100 - Electrical components.

Detailed ways

In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only the technical solutions of the present invention. Some, but not all, embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present invention.

This embodiment provides a cabinet, as shown in Figures 1-3, the cabinet includes a cabinet body 1, and at least two accommodation cavities 12 are provided in the cabinet body 1, and each accommodation cavity 12 is correspondingly provided with a pressure relief port 13 , the gas in each accommodating chamber 12 can be discharged through the corresponding pressure relief port 13 . By arranging at least two housing chambers 12, multiple electrical components 100 can be separated to prevent multiple electrical components 100 from influencing each other during operation. In addition, multiple housing chambers 12 can also meet the protection requirements of different electrical components 100. The protection effect of the electrical component 100 is good.

Optionally, as shown in FIG. 2 , at least two accommodating chambers 12 are provided independently of each other, and the pressure relief ports 13 corresponding to the mutually independent accommodating chambers 12 are opened on the cabinet body 1, and each accommodating chamber 12 can pass through the corresponding The pressure relief port 13 directly performs pressure relief, which can meet the pressure relief needs of multiple accommodation chambers 12 and has a good pressure relief effect. Pressure relief can be realized without additional pressure relief channels. On the one hand, it can make the overall structure of the cabinet compact and reduce the size of the cabinet. On the other hand, the gas in the accommodation cavity 12 can be quickly discharged from the corresponding pressure relief port 13, the pressure relief effect is good, and the protection of the electrical components 100 contained in the accommodation cavity 12 The effect is good.

In this embodiment, as shown in FIG. 2 , the cabinet includes three partitions 11 , and the three partitions 11 are arranged at intervals in the cabinet body 1 along the vertical direction and divide the inside of the cabinet body 1 to form three accommodating chambers 12 The cabinet body 1 is provided with a pressure relief port 13 corresponding to each accommodation chamber 12, and the gas in each accommodation chamber 12 can be discharged through the corresponding pressure relief port 13 for pressure relief. Specifically, the accommodating cavity 12 near the top or bottom of the cabinet body 1 can release pressure through the pressure relief port 13 opened on the top or bottom of the cabinet body 1, or through the pressure relief port 13 opened on the side of the cabinet body 1. For pressure relief, the accommodating cavity 12 away from the top and bottom of the cabinet body 1 can be pressure relieved through the pressure relief port 13 opened on the side of the cabinet body 1 .

Of course, the arrangement of the accommodation cavity 12 is not limited thereto. In other embodiments, as shown in FIG. Inside the accommodation chamber 122, the first accommodation chamber 121 communicates with the second accommodation chamber 122 through the corresponding pressure relief port 13, without setting an additional sealing structure, the protection level of the first accommodation chamber 121 can be improved, when the first accommodation chamber When the electrical component 100 inside 121 has an arcing fault, the high-pressure gas inside the first accommodation chamber 121 can enter the second accommodation chamber 122 through the pressure relief port 13 corresponding to the first accommodation chamber 121, and is released by the corresponding pressure relief port 13 of the second accommodation chamber 122 The pressure relief port 13 discharges. It can be understood that, the pressure relief opening 13 corresponding to the first accommodation chamber 121 is close to the pressure relief opening 13 corresponding to the second accommodation chamber 122 , which can improve the pressure relief effect on the first accommodation chamber 121 .

Optionally, each accommodation chamber 12 may correspond to one pressure relief port 13, and each accommodation chamber 12 may also correspond to a plurality of pressure relief ports 13, which may be set according to actual pressure relief requirements, which is not limited in this embodiment.

Preferably, as shown in FIG. 2 , an electrical component 100 is accommodated in the housing chamber 12 , and the pressure relief port 13 is arranged close to the arc-prone part of the electrical component 100 , so that when the electrical component 100 is arc-ignited, the high voltage generated at the arc-ignition place The gas can be quickly discharged from the corresponding pressure relief port 13 , which can further improve the pressure relief effect and the protection effect on the electrical component 100 . In this embodiment, the arc-prone part of the electrical component 100 specifically refers to a DC copper bar or an AC copper bar.

Preferably, as shown in Figure 4 and Figure 5, in order to prevent the gas from causing harm to nearby operators when the gas is released through the pressure relief port 13 on the side of the cabinet body 1, the cabinet also includes a protective member 2, the protective member 2 It is a shell with at least one open end in the vertical direction, and the protective member 2 can be buckled outside the pressure relief port 13 on the side wall of the cabinet, so that the gas discharged from the pressure relief port 13 on the side wall of the cabinet body 1 can be released by the protection The top and/or bottom of the part 2 is discharged to prevent the high-pressure gas inside the cabinet 1 from directly blowing to the operator, thereby protecting the operator.

Optionally, in order to meet the pressure relief requirements of the cabinet while reducing the foreign matter entering the corresponding accommodating chamber 12 from the pressure relief port 13 and affecting the normal operation of the electrical component 100, improve the protection effect of the electrical component 100 inside the cabinet, as shown in Figure 1- As shown in FIG. 5 , the cabinet also includes a pressure relief plate 3 corresponding to the pressure relief port 13 one by one. The first end of the pressure relief plate 3 is rotatably connected to the cavity wall of the accommodation chamber 12 . The outside of the housing is fastened to the cavity wall of the accommodating cavity 12 to block the pressure relief port 13 . When the electrical components 100 in the housing chamber 12 work normally, the pressure relief plate 3 is fastened to the wall of the housing chamber 12 and seals the pressure relief port 13. Under the action of high-pressure gas, it is pushed open, thereby opening the pressure relief port 13 for pressure relief. Wherein, the pressure relief plate 3 is rotatably connected with the cavity wall of the accommodating cavity 12, which can prevent the pressure relief plate 3 from falling when being pushed open, and can also be conveniently fastened to block the pressure relief port 13 after each pressure relief.

Preferably, the second end of the pressure relief plate 3 can be adsorbed on the wall of the accommodating chamber 12 to block the corresponding pressure relief port 13. Compared with the method of fixing by plastic screws, the method of magnetic adsorption is not easy to wear and tear. The advantage of long life. Specifically, the cavity wall of the accommodation cavity 12 is provided with a magnetic part 4 corresponding to the pressure relief plate 3 one by one, the first end of the pressure relief plate 3 is rotatably connected with the cavity wall of the accommodation cavity 12, and the second end of the pressure relief plate 3 can be Under the magnetic adsorption of the magnetic part 4 , it is fastened to the cavity wall of the accommodating cavity 12 and blocks the pressure relief port 13 . Wherein, the pressure relief plate 3 can be made of magnetic material, so as to be fastened to the cavity wall of the accommodation cavity 12 under the magnetic adsorption effect of the magnetic member 4 . When the force of the gas inside the accommodation chamber 12 on the pressure relief plate 3 is greater than the magnetic adsorption force between the pressure relief plate 3 and the magnetic member 4 , the pressure relief plate 3 opens the pressure relief port 13 to perform pressure relief. Wherein, the magnetic member 4 can be arranged on the inner cavity wall or the outer cavity wall of the accommodation cavity 12 , and can be set according to actual adsorption needs, which is not limited in this embodiment.

Further, the magnetic part 4 is detachably arranged on the cavity wall of the containing chamber 12 , and the corresponding magnetic part 4 can be replaced according to the pressure relief requirement of the containing chamber 12 .

Preferably, the magnetic member 4 is an electromagnet, and the electromagnet can conveniently adjust the strength of magnetic adsorption to meet the pressure relief requirements of different electrical components 100 . Of course, in other embodiments, the magnetic member 4 can also be a permanent magnet to simplify the internal circuit of the cabinet, which can be set according to actual needs, which is not limited in this embodiment.

Further, as shown in FIG. 2 , an arc sensor 5 and a controller 6 are also provided in the accommodating chamber 12 , the controller 6 is electrically connected to the arc sensor 5 and the electromagnet respectively, and the controller 6 is configured to 5 The measured arcing signal and control the on and off of the electromagnet. Specifically, when an arcing fault occurs in the housing chamber 12, the arcing sensor 5 detects the arcing fault and generates an arcing signal, the arcing sensor 5 transmits the arcing signal to the controller 6, and the controller 6 controls the electromagnet Disconnect, the magnetic adsorption effect of the electromagnet and the pressure relief plate 3 disappears, and the pressure relief plate 3 opens the pressure relief port 13 under the push of the gas inside the accommodation chamber 12 to complete the pressure relief of the accommodation chamber 12. During the opening process of the pressure relief plate 3 The electromagnet has no force on the pressure relief plate 3, so the pressure relief plate 3 can be opened quickly, and the pressure relief effect is good.

In this embodiment, the arcing sensor 5 is arranged close to the arc-prone part of the electrical component 100, so that the arcing sensor 5 can quickly detect the occurrence of an arcing fault, with high detection accuracy and rapid pressure relief. It can be understood that when the arc sensor 5 fails, the air pressure in the accommodation chamber 12 gradually increases, and the gas in the accommodation chamber 12 can overcome the adsorption force of the magnetic part 4 on the pressure relief plate 3 and push away the pressure relief plate 3, which can play a role Secondary protection function, so as to ensure the pressure relief effect of the cabinet.

Exemplarily, the arcing sensor 5 is a pressure sensor. When an arcing fault occurs in the electrical component 100, the gas pressure in the housing chamber 12 rises, and the pressure sensor detects the pressure in the housing chamber 12 and transmits the measured pressure value to the control 6, the controller 6 compares the measured pressure value with the preset pressure, when the measured pressure value is greater than the preset pressure, the controller 6 controls the electromagnet to disconnect for pressure relief, and the pressure sensor has reliable operation The advantages of good performance and high sensitivity. Of course, the arrangement of the arc sensor 5 is not limited thereto. In other embodiments, the arc sensor 5 can also be a smoke sensor or a light sensor to detect the occurrence of arc, which can be set according to actual detection needs. In addition, multiple sensors may be used to detect arcing faults at the same time, so as to further improve detection accuracy and reliability of arcing faults, which is not limited in this embodiment.

Optionally, a temperature sensor is also provided in the accommodation cavity 12, and the temperature sensor is electrically connected to the controller 6, and the controller 6 is configured to control the on-off of the electromagnet according to the temperature measured by the temperature sensor. Specifically, the temperature sensor detects the temperature in the housing chamber 12, and transmits the measured temperature value to the controller 6, and the controller 6 compares the measured temperature value with the preset temperature, and when the measured temperature value When the temperature is higher than the preset temperature, the controller 6 controls the electromagnet to turn off to open the pressure relief port 13 to dissipate heat. The heat dissipation effect is good, and the protection effect on the electrical components 100 in the accommodating cavity 12 is good.

Optionally, an alarm is also provided in the accommodation chamber 12, and the alarm is electrically connected to the controller 6. When the temperature is set, the alarm is controlled to give an alarm, so as to remind the operator to stay away from the pressure relief port 13 and perform corresponding inspections and other operations, which has a good protection effect on the operator.

In this embodiment, as shown in Figure 1, the cabinet also includes a cabinet door 7, an opening is provided on the side wall of the cabinet body 1, and the cabinet door 7 can be locked on the cabinet body 1 and block the opening.

Preferably, the locking strength of the cabinet door 7 is greater than the sealing strength between each pressure relief plate 3 and the corresponding pressure relief port 13, so that when an arcing fault occurs, the corresponding pressure relief plate 3 opens first and closes the cavity. 12 to release the pressure. It can be understood that the sealing strength between the pressure relief plate 3 and the corresponding pressure relief port 13 in this embodiment refers to the adsorption strength of the magnetic member 4 on the pressure relief plate 3 . Optionally, the cabinet also includes seals that correspond one-to-one to the pressure relief ports 13, and the seals are arranged on the pressure relief plate 3 or the outer cavity wall of the accommodation chamber 12 along the circumferential direction of the pressure relief ports 13, and the pressure relief plate 3 blocks the pressure relief When the pressure port 13 is pressed, the seals are in contact with the pressure relief plate 3 and the outer cavity wall of the accommodation chamber 12 to ensure the tightness of the pressure relief port 13, thereby improving the sealing level of the cabinet and having a good protection effect on the electrical components 100 inside the cabinet . It can be understood that the locking strength of the cabinet door 7 should not be too large, so that when the pressure relief port 13 is difficult to meet the pressure relief requirements of the accommodating chamber 12, the gas in the accommodating chamber 12 can be opened by overcoming the locking force of the cabinet door 7 Cabinet door 7 carries out pressure release, avoids cabinet explosion and causes safety accident.

Exemplarily, the pressure relief process of the cabinet is as follows: As shown in Figure 6, when an arcing fault occurs, the gas pressure inside the housing chamber 12 continues to rise, and reaches the detection pressure P1 of the pressure sensor at time t1, and the pressure sensor sends The controller 6 sends a pressure signal, the controller 6 controls the electromagnet to disconnect, the corresponding pressure relief plate 3 opens under the gas pressure inside the housing chamber 12, and the gas pressure inside the housing chamber 12 begins to drop, as shown in the pressure curve 1 in Figure 6 As shown; when the pressure sensor fails, the gas pressure inside the chamber 12 continues to rise, and at t2 the force of the gas on the pressure relief plate 3 reaches the adsorption force of the magnetic part 4 on the pressure relief plate 3, and then the gas acts on the pressure relief plate 3 The force overcomes the adsorption force of the magnetic part 4 to open the pressure relief plate 3 to perform pressure relief. The pressure change at this time is shown in the pressure curve 2 in Figure 6; The gas pressure inside continues to rise. At time t3, the force of the gas on the cabinet door 7 reaches the locking force of the cabinet door 7, and then the force of the gas on the cabinet door 7 overcomes the locking force of the cabinet door 7 and opens the cabinet door 7 for leakage. pressure, as shown in pressure curve 3 in Figure 6.

This embodiment also provides a method for pressure relief, which is used in a cabinet. The cabinet includes a cabinet body 1. At least two accommodation chambers 12 are arranged in the cabinet body 1. Each accommodation chamber 12 is provided with a pressure relief port 13. The pressure relief The method includes the following steps:

When the chamber 12 is depressurized, the corresponding pressure relief port 13 is opened, and the gas inside the chamber 12 can be discharged by the corresponding pressure relief port 13;

When the accommodating cavity 12 is not depressurized, the corresponding depressurization port 13 is closed.

The pressure relief method can respectively relieve the pressure of each accommodation chamber 12 , and can also ensure the sealing of the accommodation chamber 12 when the pressure is not released, so as to ensure the protection effect on the electrical components 100 inside the cabinet body 1 .

Preferably, the cabinet body 1 is provided with an opening, and the cabinet also includes a cabinet door 7 for blocking the opening, and the pressure relief method also includes:

When the pressure relief port 13 cannot meet the pressure relief requirements of the corresponding accommodation chamber 12, the cabinet door 7 is opened for pressure relief, thereby preventing the arcing fault from causing excessive gas pressure, and the pressure relief port 13 is difficult to meet the pressure relief requirements, making the cabinet The body 1 burst due to excessive internal air pressure, causing injury to the electrical component 100 and nearby operators.

In the description of this specification, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing this embodiment and simplifying the description, rather than indicating or implying that the referred device or structure must have a specific orientation, use a specific Azimuth configuration and operation, therefore, should not be construed as limiting the invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and should not be understood as indicating or implying relative importance. Wherein, the terms "first position" and "second position" are two different positions.

In the description of this specification, a description referring to the terms "an embodiment", "an example" and the like means that a specific feature, structure, material or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention middle. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example.

Unless otherwise clearly specified and limited, the terms "mounted", "connected", "connected" and "fixed" should be interpreted in a broad sense, for example, it may be a fixed connection or a detachable connection; it may be a mechanical connection, or It can be an electrical connection; it can be a direct connection, or an indirect connection through an intermediary, and it can be an internal communication between two elements or an interaction relationship between two elements. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

Unless otherwise expressly specified and limited, a first feature being "on" or "under" a second feature may include that the first feature is in direct contact with the second feature, and may also include that the first feature and the second feature are not in direct contact. Rather, through additional characteristic contacts between them. Moreover, "above", "above" and "above" the first feature on the second feature include that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature. "Below", "beneath" and "under" the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

In addition, the above are only preferred embodiments and technical principles used in the present invention. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and can also include more other equivalent embodiments without departing from the concept of the present invention, and the present invention The scope is determined by the scope of the appended claims.

Claims

A cabinet, characterized in that the cabinet comprises a cabinet body (1), at least two accommodation cavities (12) are arranged in the cabinet body (1), each of the accommodation cavities (12) is correspondingly provided with A pressure relief port (13), the gas in each of the accommodating chambers (12) can be discharged through the corresponding pressure relief port (13).
The cabinet according to claim 1, characterized in that at least two of the accommodating cavities (12) are arranged independently of each other, and the pressure relief ports (13) corresponding to the independent accommodating cavities (12) are all opened on the cabinet body (1).
The cabinet according to claim 1, wherein the accommodating cavity (12) comprises a first accommodating cavity (121) and a second accommodating cavity (122), and the first accommodating cavity (121) is located in the second accommodating cavity Inside the second accommodation cavity (122).
The cabinet according to claim 1, characterized in that, electrical components (100) are accommodated in the accommodating chamber (12), and the pressure relief port (13) is close to arc-prone parts of the electrical components (100) set up.
The cabinet according to claim 1, characterized in that at least one of the pressure relief openings (13) is opened on the side wall of the cabinet (1), and the cabinet also includes a protective piece (2), the protective The part (2) is a shell with at least one open end along the vertical direction, and the protection part (2) can be buckled outside the pressure relief port (13) on the side wall of the cabinet (1).
The cabinet according to claim 1, characterized in that, the cabinet further comprises a pressure relief plate (3) corresponding to the pressure relief port (13), and the first end of the pressure relief plate (3) is connected to the pressure relief plate (3). The cavity wall (1) of the accommodating cavity (12) is rotatably connected, and the second end of the pressure relief plate (3) can be fastened to the cavity wall of the accommodating cavity (12) by the outside of the accommodating cavity (12) To block the pressure relief port (13).
The cabinet according to claim 6, characterized in that, a magnetic piece (4) corresponding to the pressure relief plate (3) is provided on the cavity wall of the accommodation cavity (12), and the pressure relief plate (3) ) can be buckled on the cavity wall of the accommodating cavity (12) under the magnetic adsorption effect of the magnetic component (4).
The cabinet according to claim 7, characterized in that, the magnetic member (4) is an electromagnet.
The cabinet according to claim 8, characterized in that, an arc sensor (5) and a controller (6) are also provided in the accommodating cavity (12), and the controller (6) is connected with the arc sensor respectively. The sensor (5) is electrically connected with the electromagnet.
The cabinet according to claim 9, characterized in that a temperature sensor is further arranged in the accommodating cavity (12), and the temperature sensor is electrically connected with the controller (6).
The cabinet according to claim 9, characterized in that, an alarm is further provided in the accommodating cavity (12), and the alarm is electrically connected to the controller (6).
The cabinet according to any one of claims 6-11, characterized in that, the side wall of the cabinet body (1) is provided with an opening, and the cabinet also includes a cabinet door (7), and the cabinet door (7) Can be locked on the cabinet body (1) and block the opening, the locking strength of the cabinet door (7) is greater than that of each of the pressure relief plates (3) and the corresponding pressure relief port (13 ) between the plugging strength.
A method for pressure relief, which is used in a cabinet. The cabinet includes a cabinet body. The cabinet body is provided with at least two accommodation cavities, and each of the accommodation cavities is provided with a pressure relief port. It is characterized in that the pressure relief The method includes the following steps:

When the accommodating chamber (12) is depressurized, the corresponding pressure relief port (13) is opened, and the gas inside the accommodating chamber (12) can be discharged through the corresponding pressure relief port (13);

When the accommodating chamber (12) is not depressurized, the corresponding depressurization port (13) is closed.
The pressure relief method according to claim 13, wherein an opening is provided on the cabinet (1), and the cabinet also includes a cabinet door (7) for blocking the opening, and the pressure relief Methods also include:

When the pressure relief port (13) cannot meet the pressure relief requirements of the corresponding accommodating chamber (12), the cabinet door (7) is opened for pressure relief.