Switch cabinet assembly

Abstract

The utility model relates to the field of electrical equipment, in particular to a switch cabinet assembly, which comprises at least two switch cabinets arranged side by side, and each switch cabinet comprises a rear space which is positioned at the rear part of the switch cabinet and is communicated with at least one part of compartment of the switch cabinet, the rear spaces of every two adjacent switch cabinets are communicated with each other through through holes formed in the adjacent side faces of the two adjacent switch cabinets, the switch cabinet assembly further comprises an exhaust pipe, one end of the exhaust pipe is installed on an end switch cabinet located at one end of the switch cabinet assembly so as to be communicated with the rear space of the end switch cabinet, and the other end of the exhaust pipe is communicated with the rear space of the end switch cabinet. The other end of the exhaust pipe is connected to the outside of the switch cabinet assembly. According to the switch cabinet assembly provided by the utility model, the difficulty and time for installing the exhaust pipe on the switch cabinet assembly are obviously reduced. The switch cabinet assembly can be installed close to a rear wall, the installation process is convenient, and the installation cost is reduced.

Description

Technical Field

[0001] The utility model relates to the field of electrical equipment, in particular to a switch cabinet component. Background Art

[0002] Switchgear is commonly used in electrical equipment. Typically, multiple switchgear cabinets are arranged side by side indoors to form a switchgear assembly. In some cases, operational requirements necessitate exhaust systems for each switchgear cabinet to dissipate gases, smoke, and other gases generated by arcing within the switchgear cabinet.

[0003] For multiple switchgear panels arranged side by side, the typical exhaust system configuration involves equipping each panel with its own chimney assembly. During on-site installation of the switchgear assembly, the installer first arranges the individual switchgear panels, then secures the corresponding chimney assembly to the top of each panel. The chimney assemblies are then connected together (also known as chimney-joining panels). The connected chimney assemblies communicate with the exterior of the switchgear assembly through a common outlet. This allows the interior of each switchgear panel to communicate with the exterior of the switchgear assembly via its corresponding chimney assembly.

[0004] The on-site installation process is laborious and time-consuming, especially when the rear of the switchgear assembly needs to be mounted against a wall. Furthermore, if the interior space is low, the installation of the chimney components becomes even more challenging, further increasing installation costs.

[0005] Therefore, it is hoped that there will be a solution to the above problems. Utility Model Content

[0006] In response to the above problems, according to a first aspect of the present utility model, a switch cabinet assembly is proposed, characterized in that the switch cabinet assembly includes at least two switch cabinets arranged side by side, each switch cabinet includes a rear space located at the rear of the switch cabinet and connected to at least a portion of the compartments of the switch cabinet, wherein the rear spaces of every two adjacent switch cabinets are connected to each other via through holes provided on adjacent side surfaces of the two adjacent switch cabinets, and the switch cabinet assembly further includes an exhaust pipe, one end of the exhaust pipe is mounted to an end switch cabinet located at one end of the switch cabinet assembly to communicate with the rear space of the end switch cabinet, and the other end of the exhaust pipe is connected to the outside of the switch cabinet assembly.

[0007] The switchgear assembly of the present invention significantly reduces the difficulty and time required to install the exhaust pipe on the switchgear assembly by providing interconnected through-holes on adjacent sides of adjacent switchgears. The switchgear assembly can be installed against a rear wall, facilitating installation and reducing installation costs.

[0008] The switch cabinet assembly according to the present invention may have one or more of the following features individually or in combination.

[0009] According to one embodiment, preferably, one end of the exhaust pipe is connected to a through hole at a top surface of a rear portion of the end switch cabinet to communicate with a rear space of the end switch cabinet.

[0010] According to one embodiment, preferably, one end of the exhaust pipe is connected to a through hole at a side of the rear of the end switch cabinet away from other switch cabinets, so as to communicate with the rear space of the end switch cabinet.

[0011] According to one embodiment, preferably, the exhaust pipe includes a plurality of exhaust pipe sections sealedly connected to each other.

[0012] According to one embodiment, preferably, the housing of each switch cabinet of the switch cabinet assembly includes a rear cover portion located at the rear of the switch cabinet, the rear cover portion includes a rear cover plate and a peripheral portion extending forward along the periphery of the rear cover plate, the peripheral portion connects the rear cover plate to the rest of the housing, the peripheral portion includes a top, a bottom and two opposite side portions located between the top and the bottom, the through-holes at the top surface of the rear of one or more switch cabinets in the switch cabinet assembly are arranged at the top, and the through-holes at the side surfaces of the rear of one or more switch cabinets in the switch cabinet assembly are arranged at the side portions.

[0013] According to one embodiment, preferably, the through holes at the top surface of the rear of all switch cabinets in the switch cabinet assembly are arranged at the top, the through holes at the side surfaces of the rear of all switch cabinets in the switch cabinet assembly are arranged at the side, and the through holes of the switch cabinets in the switch cabinet assembly that are not connected with the rear space of the adjacent switch cabinet and are not connected with the exhaust pipe are closed by sealing plates.

[0014] According to one embodiment, preferably, the rear cover plate and the peripheral portion define the rear space.

[0015] According to one embodiment, preferably, the rear cover is a separate plate, and the top, bottom and two side portions of the peripheral portion are separate plate portions and are fixed to the periphery of the rear cover.

[0016] According to one embodiment, preferably, the rear cover portion includes a supporting rib provided in the rear space, the supporting rib connecting the two side portions.

[0017] According to one embodiment, preferably, the supporting rib is provided with a through hole communicating with the rear space.

[0018] According to one embodiment, preferably, the other end of the exhaust pipe is connected to the outside of the room where the switch cabinet assembly is located. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings of the embodiments of the present invention. The drawings are only used to illustrate some embodiments of the present invention, and are not intended to limit all embodiments of the present invention to these drawings.

[0020] Figure 1 4 is a perspective view of a switch cabinet assembly according to an embodiment of the present invention.

[0021] Figure 2A 4 is a perspective view of a first exhaust pipe section of a switch cabinet assembly according to an embodiment of the present invention.

[0022] Figure 2B It is a perspective view of the top cover plate of the switch cabinet assembly according to an embodiment of the present utility model.

[0023] Figure 3 It is a perspective view of the rear cover portion of the switch cabinet of the switch cabinet assembly according to an embodiment of the present utility model.

[0024] Figure 4 This is another perspective view of a switch cabinet assembly according to an embodiment of the present invention, without showing the rear cover plates of the respective switch cabinets.

[0025] Figure 5 4 is a perspective view of a switch cabinet assembly according to another embodiment of the present invention.

[0026] Figure 6 4 is a perspective view of a switch cabinet assembly according to another embodiment of the present invention.

[0027] Figure 7 This is a perspective view of an exhaust pipe section of a switch cabinet assembly according to another embodiment of the present invention.

[0028] Reference Signs List

[0029] 1Switch cabinet components

[0030] 10Switch cabinet

[0031] 100 switch cabinet housing

[0032] 101 First Compartment

[0033] 102 Second Compartment

[0034] 103 Third Compartment

[0035] 110 back cover

[0036] 120 rear cover

[0037] 130 surrounding areas

[0038] 111 rear space

[0039] 131 Top

[0040] 1310 through hole

[0041] 1311 top panel

[0042] 132 bottom

[0043] 1321 bottom plate

[0044] 133 first side

[0045] 1330 through hole

[0046] 1331 first side panel

[0047] 134 second side

[0048] 1340 through hole

[0049] 1341 second side panel

[0050] 140 support ribs

[0051] 1400 through-hole

[0052] 20 switch cabinet

[0053] 30 switch cabinet

[0054] 81 top cover

[0055] 82 side cover

[0056] 90 exhaust pipe

[0057] 91 first exhaust pipe section

[0058] 910 Inlet of the first exhaust pipe section

[0059] 911 first exhaust pipe section outlet

[0060] 92 Second exhaust pipe section

[0061] 93 Third exhaust pipe section

[0062] 94 fourth exhaust pipe section

[0063] 941 The outlet of the fourth exhaust pipe section DETAILED DESCRIPTION

[0064] In order to make the purpose, technical solution and advantages of the technical solution of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of the specific embodiments of the present invention. The same figure marks in the drawings represent the same parts. It should be noted that the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0065] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning understood by persons of ordinary skill in the field to which the present invention belongs. The words "first", "second" and similar terms used in the specification and claims of the present utility model patent application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "a" do not necessarily indicate a quantity limitation. Words such as "include" or "comprise" mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to direct connections, but may include indirect connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0066] The present invention will be described in detail below by describing exemplary embodiments.

[0067] Figure 1 FIG1 shows a perspective view of a switch cabinet assembly 1 according to an embodiment of the present invention. Figure 1 , three switch cabinets 10, 20, 30 are arranged side by side. However, according to the present invention, the number of switch cabinets in the switch cabinet assembly 1 is not limited to three, and the switch cabinet assembly 1 may include at least two switch cabinets arranged side by side. Figure 1 Also shown is an exhaust duct 90. One end of the exhaust duct 90 is mounted to the switchgear 10, communicating with the rear space within the switchgear 10, as will be described in detail later. Since the switchgear 10 is located at one end of the switchgear assembly 1, it is also referred to as an end switchgear. The other end of the exhaust duct 90 is connected to the exterior of the switchgear assembly 1. For example, the other end of the exhaust duct 90 may be connected to the exterior of the room where the switchgear assembly 1 is located.

[0068] exist Figure 1In FIG, the exhaust pipe 90 includes a plurality of exhaust pipe sections sealed to each other, namely a first exhaust pipe section 91, a second exhaust pipe section 92, a third exhaust pipe section 93 and a fourth exhaust pipe section 94. The first exhaust pipe section 91 is directly connected to the rear space in the switch cabinet 10. See also Figure 2A Below the first exhaust duct section 91, an inlet 910 is provided. This inlet communicates with a through-hole on the top surface of the switchgear 10, thereby connecting to the rear space within the switchgear 10. A side of the first exhaust duct section 91 is provided with an outlet 911 for communicating with other exhaust duct sections. Thus, gas in the rear space within the switchgear 10 can be discharged out of the switchgear assembly 1 through the first exhaust duct section 91, the second exhaust duct section 92, the third exhaust duct section 93, and the fourth exhaust duct section 94, sequentially passing through the fourth exhaust duct section's outlet 941.

[0069] exist Figure 1 In the embodiment, the switch cabinets 20 and 30 do not belong to the end switch cabinets mentioned above. However, the switch cabinets 20 and 30 themselves can have a structure substantially the same as that of the switch cabinet 10. Through holes can also be provided on the top surface of each of the switch cabinets 20 and 30. Figure 1 As shown, the through holes at the top surfaces of the switch cabinets 20 and 30 can be closed by sealing plates, for example, Figure 2B The top cover plate 81 is shown as closed. Thus, in the switchgear assembly 1, the exhaust pipe 90 is connected only to the switchgear 10 serving as the end switchgear.

[0070] Figure 3 FIG. 1 shows a rear cover portion 110 of a switch cabinet for a switch cabinet assembly 1 according to the present invention. According to one embodiment of the present invention, the rear cover portion 110 can be installed at the rear of each switch cabinet. Figure 3 As shown, the rear cover portion 110 includes a rear cover plate 120 and a peripheral portion 130 extending along the periphery of the rear cover plate 120. The peripheral portion 130 extends forward from the rear cover plate 120 relative to the front-rear direction defined by the switchgear assembly 1. The peripheral portion 130 connects the rear cover plate 120 to the rest of the housing 100 of the switchgear.

[0071] like Figure 3 As shown, the peripheral portion 130 includes a top portion 131, a bottom portion 132, and two opposite side portions located between the top portion 131 and the bottom portion 132. The two opposite side portions can be referred to as a first side portion 133 and a second side portion 134, respectively. Figure 3The top 131 may be provided with one or more through holes 1310, the first side 133 may be provided with one or more through holes 1330, the second side 134 may be provided with one or more through holes 1340, and the bottom 132 may not be provided with any through holes. Specifically, for example, the top 131, the bottom 132, the first side 133, and the second side 134 may be separate panels, namely, the top panel 1311, the bottom panel 1321, the first side panel 1331, and the second side panel 1341, respectively. The rear cover 120 may also be a separate panel, and the top panel 1311, the bottom panel 1321, the first side panel 1331, and the second side panel 1341 are each fixed to the periphery of the rear cover 120 after being bent by sheet metal. In this way, the structure of the rear cover portion 110 can be achieved at a lower cost.

[0072] like Figure 3 As shown, the rear cover portion 110 further includes support ribs 140 . Figure 3 Two supporting ribs 140 are shown, each connecting the first side portion 133 and the second side portion 134, thereby providing enhanced rigidity for the peripheral portion 130 and the rear cover portion 110. The supporting ribs 140 may also be provided with one or more through holes 1400 to allow the interior of the space surrounded by the peripheral portion 130 to communicate.

[0073] Figure 4 Another perspective view of the switch cabinet assembly 1 according to an embodiment of the present invention is shown, in which the switch cabinet assembly 1 is viewed from the rear side. Figure 4 In the figure, the rear cover of each switch cabinet 10, 20, 30 is not shown, so part of the internal structure of each switch cabinet 10, 20, 30 is shown. Taking the switch cabinet 10 as an example, Figure 4 The positions of the first compartment 101, the second compartment 102 and the third compartment 103 are indicated. The first compartment 101, the second compartment 102 and the third compartment 103 may be, for example, a busbar compartment, a gas tank compartment and a cable compartment, respectively. Figure 4 The rear side wall of each compartment has a certain distance from the rear end face of the switch cabinet 10, so that the switch cabinet 10 has a rear space 111. It should be noted that Figure 4 The internal structure of the switch cabinet shown is only exemplary, and the present invention does not specifically limit the functions, arrangements and internal components of each compartment in the switch cabinet.

[0074] Figure 4 Still showing the peripheral portion 130 and the supporting ribs 140 of the rear cover portion 110 of each switch cabinet 10, 20, 30. It can be seen that according to the embodiment of the present invention, the rear cover plate 120 and the peripheral portion 130 of the rear cover portion 110 define the rear space 111 of the corresponding switch cabinet. Figure 4As shown, the rear space 111 of the switch cabinet 10 extends substantially from the bottom to the top of the switch cabinet 10. Accordingly, the support rib 140 is disposed in the rear space 111, and the through hole 1400 disposed on the support rib 140 is disposed to communicate with the rear space 111.

[0075] According to an embodiment of the present invention, the rear space 111 is connected to the first compartment 101, the second compartment 102, and the third compartment 103, for example, through the through holes or channels on the rear side walls of each compartment. Thus, when arcing occurs in a compartment, the pressure, high-temperature gas, particles, etc. generated by the arcing can enter the rear space 111 of the corresponding switch cabinet through the through holes or channels on the rear side walls. In other words, according to the present invention, for example, for the switch cabinet 10, its rear space 111 is connected to at least a part of its compartments, so that the gas and smoke generated when arcing occurs in this part of the compartment can be discharged into the rear space 111. In addition, if Figure 4 As shown, the switch cabinets 20 and 30 may also have the same rear structure as the switch cabinet 10. In particular, the switch cabinets 20 and 30 each have the same rear space as the switch cabinet 10, and at least a portion of the compartments of each of the switch cabinets 20 and 30 are also connected to the corresponding rear space.

[0076] like Figure 4 As shown, for every two adjacent switch cabinets in the switch cabinet assembly 1, no barrier is provided between the through holes 1330, 1340 on the respective rear cover parts on the adjacent sides. Thus, for two adjacent switch cabinets, their rear spaces are connected to each other through the through holes 1330, 1340. In other words, for all the switch cabinets in the switch cabinet assembly 1, their rear spaces are connected to each other, forming a through space for exhaust. In addition, as mentioned above, the through holes on the top surface of the switch cabinet of the non-end switch cabinet in the switch cabinet assembly 1 are closed by a sealing plate. Also refer to Figure 1 and Figure 4 For the two switchgear cabinets at either end of the switchgear assembly 1, the side openings are sealed by side sealing plates 82. Therefore, if an arc occurs in a compartment of any switchgear cabinet within the switchgear assembly 1, the generated gases and particles can reach the end switchgear cabinet (switchgear cabinet 10 in the illustrated embodiment) and then be discharged to the exterior of the switchgear assembly 1 through exhaust pipe 90. In particular, according to the configuration of the present invention, the high pressure generated by an arc in a switchgear cabinet can be shared by the rear covers of multiple switchgear cabinets, thereby enhancing the arc resistance of the switchgear assembly 1. Accordingly, the forward extension length of the peripheral portion 130 can be adjusted to be narrower while still ensuring a certain level of arc resistance for the switchgear assembly 1, thereby reducing the overall thickness of the switchgear assembly 1 in the front-to-back direction. According to the applicant's test results, the switchgear assembly according to the present application can achieve an arc resistance of 25 kA / 1s.

[0077] refer to Figure 1 and Figure 4 As can be seen, during on-site installation, the switchgear assembly 1 according to the embodiment of the present invention eliminates the need to install exhaust devices on top of each switchgear cabinet and seal these exhaust devices together. Instead, only the exhaust duct 90 needs to be installed on the end switchgear cabinets, and only the sealing plate needs to be fixed on the tops of the other switchgear cabinets. Considering that switchgear assemblies are typically located in rooms with limited space, this arrangement significantly reduces the difficulty and time required to install the exhaust duct on the switchgear assembly. During on-site installation, the switchgear assembly can be easily installed against the rear wall, facilitating installation and reducing installation costs.

[0078] On the other hand, as described above, according to the illustrated embodiment of the present invention, the through-holes on the top surface of the rear portion of each switch cabinet in the switch cabinet assembly 1 are all disposed at the top 131 of the rear cover portion 110, and the through-holes on the side surfaces of the rear portion of each switch cabinet are all disposed at the side portions 133 and 134 of the rear cover portion 110. The through-holes of the switch cabinet that do not communicate with the rear space of adjacent switch cabinets or the exhaust duct are sealed by sealing plates (e.g., top sealing plates 81 or side sealing plates 82). However, according to an unillustrated embodiment of the present invention, the portions of the peripheral portion 130 of the rear cover portion 110 of each switch cabinet that are not configured to communicate with the rear space of adjacent switch cabinets or the exhaust duct may not be provided with through-holes, that is, the corresponding top and side portions of the rear cover portion 110 may not be provided with through-holes. In addition, according to another embodiment of the present invention (not shown), the through-holes of the switch cabinet configured to communicate with the rear space of an adjacent switch cabinet or with the exhaust pipe may not be provided on the peripheral portion of the rear cover portion 110, but may be provided in the remaining portion of the housing 100 of the corresponding switch cabinet, near the rear space 111 of the switch cabinet. In these cases, the rear spaces of each two adjacent switch cabinets are still connected to each other via the through-holes provided on the adjacent side surfaces of the two adjacent switch cabinets.

[0079] Figure 5 Another embodiment of the switch cabinet assembly 1 according to the present invention is shown. Figure 1 and Figure 4 The switch cabinet components shown differ only in the arrangement of the exhaust pipe 90. Figure 5 In the example, exhaust duct 90 includes only two exhaust duct sections: a first exhaust duct section 91 and a second exhaust duct section 92. In practice, according to embodiments of the present invention, the arrangement of exhaust duct sections in exhaust duct 90 can be selected based on factors such as the switchgear assembly's location within the room and its distance from the room's air outlet. Therefore, if exhaust duct 90 may include multiple, sealed, connected exhaust duct sections, exhaust duct sections of varying specifications can be prepared in advance and then directly selected and combined based on the on-site installation requirements of the switchgear assembly.

[0080] Figure 6 FIG. 1 shows another embodiment of a switch cabinet assembly 1 according to the present invention. The switch cabinet assembly 1 according to this embodiment differs from the aforementioned switch cabinet assembly only in the arrangement of the exhaust pipe 90. Figure 6 In the embodiment, the exhaust pipe 90 is provided on the side of the switch cabinet 10 serving as the end switch cabinet. In other words, one end of the exhaust pipe 90 is connected to a through hole on the side of the switch cabinet 10 away from the other switch cabinets, such as a portion of the first side through hole 1330, to communicate with the rear space of the switch cabinet 10. As a result, the through holes on the top surface of all the switch cabinets in the switch cabinet assembly 1 are sealed by the top surface sealing plate 81, and the side sealing plate 82 on the side of the switch cabinet 10 away from the other switch cabinets reserves an opening for the exhaust pipe 90. Figure 5 The switchgear components shown, Figure 6 The switch cabinet assembly shown may require fewer exhaust pipe sections (e.g., only Figure 7 The first exhaust pipe section 91 shown in the figure) is also easier and takes less time to operate on the top of the switch cabinet assembly 1 during on-site installation, further reducing manufacturing and installation costs.

[0081] The exemplary implementation of the switch cabinet assembly proposed in the present invention is described in detail above with reference to the preferred embodiments. However, it will be understood by those skilled in the art that various modifications and variations can be made to the above-mentioned specific embodiments without departing from the concept of the present invention, and various combinations of the various technical features and structures proposed in the present invention can be made without exceeding the scope of protection of the present invention.

Claims

1. A switch cabinet assembly, characterized in that: The switch cabinet assembly includes at least two switch cabinets arranged side by side, each switch cabinet including a rear space located at the rear of the switch cabinet and communicating with at least a portion of the compartments of the switch cabinet, wherein the rear spaces of every two adjacent switch cabinets are communicated with each other via through holes provided on adjacent sides of the two adjacent switch cabinets. The switch cabinet assembly further includes an exhaust pipe, one end of which is mounted to an end switch cabinet located at one end of the switch cabinet assembly to communicate with a rear space of the end switch cabinet, and the other end of which is connected to the outside of the switch cabinet assembly.

2. The switch cabinet assembly according to claim 1, characterized in that: One end of the exhaust pipe is connected to a through hole at the top surface of the rear portion of the end switch cabinet to communicate with the rear space of the end switch cabinet.

3. The switch cabinet assembly according to claim 1, characterized in that: One end of the exhaust pipe is connected to a through hole at a side of the rear portion of the end switch cabinet away from other switch cabinets, so as to communicate with the rear space of the end switch cabinet.

4. The switch cabinet assembly according to claim 1, characterized in that The exhaust pipe comprises a plurality of exhaust pipe sections which are sealedly connected to one another.

5. The switch cabinet assembly according to any one of claims 1 to 4, characterized in that: The housing of each switch cabinet of the switch cabinet assembly includes a rear cover portion located at the rear of the switch cabinet, the rear cover portion including a rear cover plate and a peripheral portion extending forward along the periphery of the rear cover plate, the peripheral portion connecting the rear cover plate to the rest of the housing, The peripheral portion includes a top, a bottom, and two opposite side portions located between the top and the bottom, the through holes at the top surface of the rear of one or more switch cabinets in the switch cabinet assembly are arranged at the top, and the through holes at the side surfaces of the rear of one or more switch cabinets in the switch cabinet assembly are arranged at the side portions.

6. The switch cabinet assembly according to claim 5, characterized in that: The through holes at the top surface of the rear of all switch cabinets in the switch cabinet assembly are arranged at the top, the through holes at the side surfaces of the rear of all switch cabinets in the switch cabinet assembly are arranged at the side, and the through holes of the switch cabinets in the switch cabinet assembly that are not connected with the rear space of the adjacent switch cabinet and are not connected with the exhaust pipe are closed by sealing plates.

7. The switch cabinet assembly according to claim 5, characterized in that: The rear cover and the peripheral portion define the rear space.

8. The switch cabinet assembly according to claim 5, characterized in that: The rear cover plate is a separate plate, and the top, bottom, and both sides of the peripheral portion are separate plate members and are fixed to the periphery of the rear cover plate.

9. The switch cabinet assembly according to claim 5, characterized in that: The rear cover portion includes a support rib provided in the rear space, the support rib connecting the two side portions.

10. The switch cabinet assembly according to claim 9, characterized in that: The supporting rib is provided with a through hole communicating with the rear space.

11. The switch cabinet assembly according to claim 1, characterized in that: The other end of the exhaust pipe is connected to the outside of the room where the switch cabinet assembly is located.

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