A switch

Abstract

The utility model relates to a switch belongs to low voltage electrical apparatus technical field, including arc extinguishing chamber, arc extinguishing chamber includes a pair of side plate and multiple louvers arranged between a pair of side plate, arc extinguishing chamber has the gas outlet of outward exhaust, characteristics: in the outside of side plate is equipped with the lateral air channel of the communication gas outlet, lateral air channel passes through the air hole and is communicated with at least one side of the gas outlet end of at least part louvers, advantage: because of setting up lateral air channel, the outside area of side plate is used for ventilation, thereby can improve the gas exhaust smoothness of arc extinguishing chamber, is favorable to arc fast into the louver, improves arc extinguishing effect.

Description

Technical Field

[0001] This utility model belongs to the field of low-voltage electrical technology, and specifically relates to a switch. Background Technology

[0002] Switches are crucial electrical devices in power supply and distribution lines, interrupting current to break the circuit and protecting lines and equipment. A switch typically includes a contact system, which consists of moving and stationary contacts. When the moving contact actuates, it contacts or separates from the stationary contact, thus enabling the switch to conduct or disconnect. As is known in the industry, when a switch breaks, an electric arc is generated between the moving and stationary contacts. This arc has relatively large energy, posing a significant challenge to the switch's breaking action. The circuit can only be broken when the arc is extinguished. Therefore, a quenching chamber is usually installed within the switch. Under the combined action of magnetic and air force, the arc enters the quenching chamber and is cut into multiple short arcs connected in series by the grid plates, thereby increasing the arc voltage and extinguishing the arc. As a vital component of the circuit breaker, the arc-quenching chamber's arc-extinguishing capability directly determines the circuit breaker's overload and short-circuit current breaking performance.

[0003] To ensure the arc can smoothly enter the grid assembly within the arc-extinguishing chamber, the air venting from the grids within the chamber must be considered. Ensuring smooth air venting is crucial for the arc's successful entry. Currently, due to limited internal space, switches can only arrange the arc-extinguishing grids sequentially along the circumference of the contact assembly when designing the arc-extinguishing chamber. However, under high-voltage requirements, switches often stack more grids to meet arc voltage demands, making the smoothness of air venting from the arc-extinguishing chamber even more critical. Based on the aforementioned existing technologies, the applicant has developed a beneficial design, and the technical solution described below arises from this context. Utility Model Content

[0004] The purpose of this invention is to provide a switch that improves the airflow of the arc-extinguishing chamber by increasing the ventilation area, thereby ensuring that the electric arc can quickly enter the grid plate of the arc-extinguishing chamber and improving the arc-extinguishing effect.

[0005] The purpose of this utility model is achieved as follows: a switch includes an arc-extinguishing chamber, the arc-extinguishing chamber includes a pair of side plates and a plurality of grid plates arranged in an array between the pair of side plates, the arc-extinguishing chamber has an exhaust port for venting air outward, and a lateral air passage is provided on the outer side of the side plates to communicate with the exhaust port, the lateral air passage being connected to at least one side of the exhaust end of at least a portion of the grid plates through an air hole.

[0006] In a specific embodiment of this utility model, it further includes a housing, in which a contact arc-extinguishing cavity is formed, the arc-extinguishing chamber is located in the contact arc-extinguishing cavity, the air outlet is located on the housing and penetrates the outside of the housing and the contact arc-extinguishing cavity, and the air hole is located on the side plate.

[0007] In another specific embodiment of this utility model, there is a pair of lateral air passages, which are located on the outer side of the pair of side plates respectively. Each side plate is provided with an air hole, which penetrates both sides of the air outlet end of at least a portion of the grid plate.

[0008] In another specific embodiment of this utility model, the lateral air passage is formed by the side plate and the inner wall of the housing, and a rib is provided between the side plate and the housing to form the air passage wall between the side plate and the inner wall of the housing.

[0009] In another specific embodiment of this utility model, a contact system is also included, wherein the lateral air passage is U-shaped and includes a main air passage located outside the side plate and an auxiliary air passage located on the side of the arc-extinguishing chamber away from the contact system.

[0010] In another specific embodiment of this utility model, in the height direction of the switch, the air hole on the side plate is located at the bottom, while the air outlet is located at the top.

[0011] In a further specific embodiment of this utility model, a contact system is also included, the contact system including a moving contact and a stationary contact; the grid includes a first grid group and a third grid group, the first grid group is located on the side away from the contact system in the width direction of the switch, and the third grid group is arranged corresponding to the stationary contact, the first grid group and the third grid group forming an L-shaped structure.

[0012] In a more specific embodiment of this utility model, the air holes on the side plate correspond to the two sides of the air outlet end of the third grid plate group.

[0013] In yet another specific embodiment of this utility model, the arc-extinguishing chamber further includes an orifice plate, the orifice plate including a first orifice plate, the first orifice plate being located on the air outlet side of the first grid plate group, and a first air passage being formed between the first orifice plate and the inner wall of the housing.

[0014] In yet another specific embodiment of this utility model, the lateral airway is connected to the first airway.

[0015] In another specific embodiment of this utility model, the first airway is isolated from the lateral airway.

[0016] Because this invention incorporates the lateral air passage, the outer area of ​​the side plate is used for ventilation, thereby improving the airflow smoothness of the arc-extinguishing chamber, facilitating the rapid entry of the electric arc into the grid plate, and enhancing the arc-extinguishing effect. Attached Figure Description

[0017] Figure 1 This is a side sectional view of the switch described in the first embodiment of this utility model; Figure 2 This is a schematic diagram of the overall structure of the arc-extinguishing chamber described in the first embodiment of this utility model; Figure 3 This is an explosion diagram of the arc-extinguishing chamber described in the first embodiment of this utility model; Figure 4 This is a partial structural diagram of the switch described in the first embodiment of the present invention; Figure 5 This is a side sectional view of the arc-extinguishing chamber installed inside the housing in the first embodiment of this utility model; Figure 6 This is a top sectional view of the arc-extinguishing chamber installed inside the housing in the first embodiment of this utility model; Figure 7 This is a schematic diagram of the overall structure of the arc-extinguishing chamber described in the second embodiment of this utility model; Figure 8 This is a schematic diagram of the overall structure of the arc-extinguishing chamber in the third embodiment of the present invention; Figure 9 This is a side sectional view of the arc-extinguishing chamber installed inside the housing according to the third embodiment of this utility model.

[0018] In the diagram: 1. Arc-extinguishing chamber; 11. Grid plate; 111. First grid plate group; 112. Second grid plate group; 113. Third grid plate group; 114. Connecting element; 12. Side plate; 121. Baffle plate; 122. Vent hole; 13. Orifice plate; 131. First orifice plate; 132. Second orifice plate; 14. Moving arc-starting plate; 2. Contact system; 21. Moving contact; 22. Stationary contact; 221. Stationary arc-starting plate; 3. Shell. Body, 31. First half shell, 32. Second half shell; 10. First shell, 20. Second shell, 30. Third shell, 40. Fourth shell; 100. Isolator, 200. Separator, 300. Protruding rib, 400. Air passage, 401. First air passage, 402. Second air passage, 403. Lateral air passage; 1000. Air outlet, 1001. First air outlet, 1002. Second air outlet. Detailed Implementation

[0019] The specific embodiments of this utility model are described in detail below with reference to the accompanying drawings. However, the description of the embodiments is not a limitation on the technical solution. Any formal but not substantive changes made based on the concept of this utility model should be considered within the protection scope of this utility model.

[0020] In the following description, all directional (or orientational) concepts involving up, down, left, right, front, and back refer to the position of the figure being described, and are intended to facilitate public understanding. Therefore, they should not be construed as a special limitation on the technical solution provided by this utility model.

[0021] Example 1: As Figure 1 and Figure 2 As shown, this utility model relates to a switch, which includes an arc-extinguishing chamber 1, a contact system 2, and a housing 3. The arc-extinguishing chamber 1 and the contact system 2 are both located inside the housing 3, and the arc-extinguishing chamber 1 is located on the side of the contact system 2 in the opening direction. Thus, when the contact system 2 is opened and an electric arc is generated, the electric arc will enter the arc-extinguishing chamber 1 and be extinguished in the arc-extinguishing chamber 1.

[0022] See Figure 1 The housing 3 includes a first half-shell 31 and a second half-shell 32, which are joined together to form a contact arc-extinguishing cavity. This cavity accommodates the contact system 2 and the arc-extinguishing chamber 1. In this embodiment, the first half-shell 31 is located below, while the second half-shell 32 is located above the first half-shell 31.

[0023] The contact system 2 includes a moving contact 21 and a stationary contact 22. The stationary contact 22 is fixedly disposed, while the moving contact 21 is rotatably disposed. After the moving contact 21 rotates, it contacts or separates from the stationary contact 22, thereby realizing the closing or opening of the contact system 2.

[0024] See you later Figure 1In the figure, the first direction is the line connecting the open positions of the moving contact 21 and the stationary contact 22, and the second direction is the overall line connecting the contact system 2 and the arc-extinguishing chamber 1. The second direction is perpendicular to the first direction. The arc-extinguishing chamber 1 includes multiple grid plates 11, which further include a first grid plate group 111, a second grid plate group 112, and a third grid plate group 113. One end of the first grid plate group 111 engages with one end of the second grid plate group 112, and the other end of the first grid plate group 111 engages with one end of the third grid plate group 113, thereby forming a C-shape. Specifically, in the second direction, the first grid plate group 111 is arranged along the first direction on the side away from the contact system 2, and the second grid plate group 112, corresponding to the moving contact 21, is located above the first grid plate group 111 in the first direction and arranged along the second direction. The first grid plate group 111 and the second grid plate group 112 form an L-shaped structure. The third grid group 113 corresponds to the stationary contact 22, located below the first grid group 111 in the first direction and arrayed along the second direction. More specifically, the grids 11 of the second grid group 112 are inclined toward the contact system 2, and similarly, the grids 11 of the third grid group 113 are also inclined toward the contact system 2.

[0025] Still see Figure 1 The arc-extinguishing chamber 1 further includes side plates 12, perforated plates 13, and moving arc-inducing plates 14. The side plates 12 are a pair, spaced apart from each other. The grid plates 11 and the moving arc-inducing plates 14 are located between the pair of side plates 12, while the perforated plate 13 is located on the exhaust port side of the grid plates 11. The moving arc-inducing plate 14 is used to cooperate with the moving contact 21; similarly, a stationary arc-inducing plate 221 is also installed on the stationary contact 22. More specifically, the moving arc-inducing plate 14 also cooperates with the end of the second grid plate group 112 near the moving contact 21, while the stationary arc-inducing plate 221 cooperates with the side of the third grid plate group 113 near the stationary contact 22.

[0026] like Figure 3 As shown, the arc-extinguishing chamber 1 includes a first housing 10, a second housing 20, a third housing 30, and a fourth housing 40. The first housing 10, second housing 20, third housing 30, and fourth housing 40 are joined together to form the arc-extinguishing chamber shell of the arc-extinguishing chamber 1. The arc-extinguishing chamber shell is the external insulating layer of the arc-extinguishing chamber 1, and the grid plate 11 and the moving arc-inducing plate 14 are both installed inside the arc-extinguishing chamber shell. The above distinction is only a distinction in the number of components. The side plate 12 is composed of a portion of the aforementioned arc-extinguishing chamber shell, while the perforated plate 13 can be composed of a portion of the arc-extinguishing chamber shell or can be composed independently.

[0027] Specifically, the first housing 10 is a pair, located on both sides of the arc-extinguishing chamber 1 along a third direction as shown in the figure. The third direction is the width direction of the arc-extinguishing chamber 1, which can also be referred to as the width direction of the grid plate 11. The third direction is perpendicular to the first direction and the second direction. The second housing 20 is also a pair, and the pair of second housing 20 can be integrally formed. The second housing 20 is installed in conjunction with the first housing 10; the first housing 10 is located on the air inlet side of the arc-extinguishing chamber 1 relative to the second housing 20, while the second housing 20 is located on the air outlet side of the arc-extinguishing chamber 1 relative to the first housing 10. The third housing 30 is used to be installed in conjunction with the second grid plate group 112, and the fourth housing 40 is used to be installed in conjunction with the third grid plate group 113. Specifically, in the first direction, the third housing 30 is located above and on the side corresponding to the moving contact 21, while the fourth housing 40 is located below and on the side corresponding to the stationary contact 22.

[0028] Furthermore, a pair of baffles 121 are provided on the side of the first housing 10 facing the contact system 2. The baffles 121 are located on both sides of the moving contact piece of the moving contact 21 and cooperate with the rotating shaft on which the moving contact 21 is mounted.

[0029] See you later Figure 3 The first grid plate group 111 and the second grid plate group 112 are electrically connected by a series connector 114. Specifically, the series connector 114 is made of a metal plate bent into a "<" shape; or, the series connector 114 is made of a metal block processed into a triangle. The two outer surfaces of the series connector 114 are respectively spaced apart from the closest end grid plate in the first grid plate group 111 and the closest end grid plate in the second grid plate group 112.

[0030] See Figure 4 The arc-extinguishing chamber 1 has an exhaust port 1000, preferably located on the housing 3. In this embodiment, the exhaust port 1000 is located on the side wall of the housing 3 corresponding to the arc-extinguishing chamber 1 in the second direction. The exhaust port 1000 penetrates the outer side of the housing 3 and the contact arc-extinguishing cavity inside the housing 3, and the gas in the arc-extinguishing chamber 1 is discharged outward through the exhaust port 1000. Specifically, the exhaust port 1000 is located on the second half-shell 32, and more specifically, the exhaust port 1000 is provided corresponding to the first grid plate group 111 and the second grid plate group 112. In this embodiment, the switch is a three-pole housing. Preferably, the exhaust port 1000 is located on the two switch poles; the contact system 2 is also located on the two switch poles. The wiring portion of the stationary contact 22 is provided below the exhaust port 1000.

[0031] like Figure 5 An air passage 400 is provided on the side of the perforated plate 13 away from the grid plate 11, and the air passage 400 communicates with the air outlet 1000. A partition 100 is provided within the air passage 400, dividing it into a first air passage 401 and a second air passage 402. Since the partition 100 corresponds to the inner region of the air outlet 1000, both the first air passage 401 and the second air passage 402 are necessarily connected to the air outlet 1000.

[0032] The gas within the gaps in the grid 11 passes through the perforated plate 13 and enters the first air passage 401 and the second air passage 402. The airflow in the first air passage 401 and the second air passage 402 travels in opposite directions and is then discharged outward from the outlet 1000. Due to the partition 100, the airflow in the first air passage 401 and the second air passage 402 does not interfere with each other, thus ensuring smooth airflow discharge, facilitating rapid arc entry into the grid 11, and improving the arc extinguishing effect.

[0033] Furthermore, the effect of the partition 100 is not related to the arrangement shape of the grid plates 11. For example, when the grid plates 11 consist of only a strip-shaped grid plate group, the air outlet 1000 is located between the two ends of the air passage 400. The partition 100 cooperates with the air outlet 1000 to generate the first air passage 401 and the second air passage 402. Also, due to the presence of the partition 100, the airflow in the two passages will not affect each other, ensuring the smoothness of airflow discharge and facilitating the entry of the electric arc into the grid plates 11.

[0034] The perforated plate 13 includes a first perforated plate 131 and a second perforated plate 132. The first perforated plate 131 corresponds to the first grid plate group 111, and the second perforated plate 132 corresponds to the second grid plate group 112. That is, the first perforated plate 131 is located on the exhaust port side of the first grid plate group 111, and the second perforated plate 132 is located on the exhaust port side of the second grid plate group 112.

[0035] The separator 100 is located on one side of the first perforated plate 131. Specifically, the separator 100 is located on the upper part of the first perforated plate 131, and the first air passage 401 includes an air passage located on the side of the first perforated plate 131 away from the grid plate 11 and below the separator 100; while the second air passage 402 includes an air passage located on the side of the second perforated plate 132 away from the grid plate 11 and an air passage located on the side of the first perforated plate 131 away from the grid plate 11 and above the separator 100.

[0036] Furthermore, the air passage 400 is formed by the perforated plate 13 and the inner wall of the housing 3, and multiple ribs are provided between the perforated plate 13 and the housing 3 to form the air passage wall of the air passage 400. Specifically, the air passage wall is located between the side plate 12 and the inner wall of the housing 3. The separator 100 can be disposed on the perforated plate 13 or on the inner side of the housing 3; the separator 100 can also be partially disposed on the perforated plate 13 and partially disposed on the inner side of the housing 3, with the two parts joined together to form a complete separator 100. Preferably, the separator 100 is strip-shaped.

[0037] See you later Figure 2 , Figure 3 and Figure 6 The air passage 400 further includes a lateral air passage 403, which is located within the contact arc-extinguishing chamber and corresponds to and cooperates with the third grid plate group 113 for air outlet of the third grid plate group 113. The lateral air passage 403 is located on at least one outer side of a pair of side plates 12 of the arc-extinguishing chamber 1. The lateral air passage 403 is connected to at least one side of the air outlet end of at least a portion of the grid plate 11 through an air hole 122. The air outlet end of the grid plate 11 refers to the end away from the arc inlet in the extending direction of the grid plate 11, thereby facilitating the full entry of the arc into the grid plate 11. Preferably, the lateral air passages 403 are a pair, respectively located on the two outer sides of a pair of side plates 12, and penetrate both sides of the third grid plate group 113 through the air hole 122. Specifically, the air hole 122 is located on the side plate 12, and more specifically, the air hole 122 is located on both sides of the fourth housing 40. The vent 122 corresponds to both sides of the outlet end of the third grid plate group 113, thereby facilitating the entry of the electric arc into the third grid plate group 113. The vent 122 may also not be formed on the side plate 12, but located on the outer side of the side plate 12. This can usually be achieved by shortening the side plate 12, thereby forming the vent 122 on the outer side of the side plate 12 near the grid plate 11; or it can be achieved by leaving an air passage on the top outer side of the grid plate 11 to communicate with the lateral air passage 403. In this case, the side plate 12 is modified accordingly to realize the air passage.

[0038] In this embodiment, the lateral air passage 403 is formed by the side plate 12 and the inner wall of the housing 3, with a rib between them to form the air passage wall between the side plate 12 and the inner wall of the housing 3. The lateral air passage 403 also connects to the outlet 1000, meaning that the lateral air passage 403 connects the gas discharged from the third grid plate group 113 to the outlet 1000. The lateral air passage 403 can solve the gas discharge problem of the third grid plate group 113, and due to the arrangement of the lateral air passage 403, the smoothness of the gas discharge from the third grid plate group 113 can be fully guaranteed, ensuring that the electric arc can enter the third grid plate group 113.

[0039] In this embodiment, the lateral air passage 403 is used only for the air outlet of the third grid plate group 113. Of course, it can also be used for the air outlet of other grid plates 11. As long as the lateral air passage 403 is formed on the outer side of at least one side plate 12 and connects to the air outlet 1000, since the side plate 12 has air holes 122, which correspond to at least one side of the air outlet end of at least a portion of the grid plates 11, it is convenient for the electric arc to quickly enter a portion of the grid plates 11. In this embodiment, due to the setting of the lateral air passage 403, the outer area of ​​the side plate 12 is used for ventilation, which improves the air outlet smoothness of the arc-extinguishing chamber 1, thereby ensuring that the electric arc can quickly enter the grid plates 11 and improving the overall arc-extinguishing effect of the arc-extinguishing chamber 1.

[0040] Furthermore, the lateral air passage 403 may also include ventilation areas located in other positions. In this embodiment, the lateral air passage 403 is "┘" shaped, and in addition to the main air passage located outside the side plate 12, it also includes an auxiliary air passage located on the side of the arc-extinguishing chamber 1 away from the contact system 2. The auxiliary air passage and the main air passage constitute a complete lateral air passage 403. Both the main air passage and the auxiliary air passage are located within the contact arc-extinguishing chamber.

[0041] See you later Figure 2 and Figure 3 and combined Figure 1 The airflow within the lateral air passage 403 flows from bottom to top in the first direction. Specifically, in the height direction of the switch, the air hole 122 on the side plate 12 is located at the bottom, while the air outlet 1000 is located at the top.

[0042] Furthermore, since the first perforated plate 131 is located on the outlet side of the first grid plate group 111, and the first air passage 401 is located between the first perforated plate 131 and the inner wall of the housing 3, and the first air passage 401 is also connected to the outlet 1000, that is, the first air passage 401 and the lateral air passage 403 are both arranged on the periphery of the arc-extinguishing chamber 1 and located inside the contact arc-extinguishing cavity. Therefore, the first air passage 401 and the lateral air passage 403 can be connected. The above-mentioned connection means that in addition to being connected on the outlet side, the two are also connected in the middle of the air passage, for example, by opening holes on the spaced ribs, or by the ribs being partial, or by having complete connection without ribs. In this embodiment, the first air passage 401 and the lateral air passage 403 are isolated from each other. Specifically, this is achieved by the spacing of the ribs.

[0043] Example 2: Figure 7 As shown, the difference between this embodiment and Embodiment 1 is that it also includes a spacer 200, which is also located between the perforated plate 13 and the inner wall of the housing 3, and is angled to the partition 100. Preferably, the partition 100 extends along a third direction; the spacer 200 extends along a first direction and intersects with the partition 100. Due to the presence of the spacer 200, the first air passage 401 is divided into multiple air passages, thereby effectively preventing frontal penetration.

[0044] In this embodiment, the isolator 200 is located only within the first airway 401, dividing the first airway 401 into at least two sub-airways. Similarly, the isolator 200 may also be located within the second airway 402 or the lateral airway 403, dividing the second airway 402 or the lateral airway 403 into at least two sub-airways.

[0045] See you later Figure 7 A raised rib 300 is also provided on the outer side of the side plate 12. On the one hand, the raised rib 300 is used for the installation of the arc-extinguishing chamber 1, and it cooperates with the inner side of the housing 3 to ensure the installation and positioning of the arc-extinguishing chamber 1 in the contact arc-extinguishing cavity; on the other hand, the raised rib 300 can also be used as a raised rib, that is, it is used to cooperate with the inner side of the housing 3 and the side plate 12 to form the air passage 400.

[0046] Example 3: As Figure 8 and Figure 9As shown, the difference between this embodiment and Embodiment 1 is that the separator 100 is located at the junction of the first perforated plate 131 and the second perforated plate 132, and this junction corresponds to the corner of the housing 3. In this embodiment, the first air passage 401 also corresponds to the first perforated plate 131, while the second air passage 402 corresponds to the second perforated plate 132. The air outlet 1000 is located at the corner of the housing 3. Specifically, the air outlet 1000 includes a first air outlet 1001 and a second air outlet 1002, wherein the first air outlet 1001 is located on the housing 3 to the right of the arc-extinguishing chamber 1 in the second direction, and is used for the air outlet of the first air passage 401. Preferably, the first air outlet 1001 is also used for the air outlet of the lateral air passage 403; the second air outlet 1002 is located on the upper housing 3 in the first direction, and is used for the air outlet of the second air passage 402.

[0047] In the above embodiments, the air outlet 1000 is a single air outlet. However, the air outlet 1000 may be divided into two or more adjacent air outlets, which is also a variation that can be conceived by those skilled in the art and falls within the protection scope of this invention.

Claims

1. A switch comprising an arc-extinguishing chamber (1), said arc-extinguishing chamber (1) comprising a pair of side plates (12) and a plurality of grid plates (11) arranged in an array between said pair of side plates (12), said arc-extinguishing chamber (1) having an exhaust port (1000) for outward exhaust, characterized in that: A lateral air passage (403) is provided on the outer side of the side plate (12) to connect to the air outlet (1000). The lateral air passage (403) is connected to at least one side of the air outlet end of at least a portion of the grid plate (11) through an air hole (122).

2. A switch according to claim 1, characterized in that: It also includes a housing (3), in which a contact arc extinguishing cavity is formed, the arc extinguishing chamber (1) is located in the contact arc extinguishing cavity, the air outlet (1000) is located on the housing (3) and penetrates the outside of the housing (3) and the contact arc extinguishing cavity, and the air hole (122) is located on the side plate (12).

3. A switch according to claim 2, characterized in that: The lateral air passages (403) are in pairs, located on the outer side of the pair of side plates (12), and each side plate (12) is provided with an air hole (122), which penetrates both sides of the air outlet end of at least part of the grid plate (11).

4. A switch according to claim 2, characterized in that: The lateral air passage (403) is formed by the side plate (12) and the inner wall of the housing (3). The side plate (12) and the housing (3) are further provided with ribs to form the air passage wall of the lateral air passage (403) located between the side plate (12) and the inner wall of the housing (3).

5. A switch according to claim 2, characterized in that: It also includes a contact system (2), wherein the lateral air passage (403) is U-shaped and includes a main air passage located outside the side plate (12) and an auxiliary air passage located on the side of the arc-extinguishing chamber (1) away from the contact system (2).

6. A switch according to claim 1, characterized in that: In the height direction of the switch, the air hole (122) on the side plate (12) is located at the bottom, while the air outlet (1000) is located at the top.

7. A switch according to claim 5, characterized in that: The contact system (2) includes a moving contact (21) and a stationary contact (22); the grid (11) includes a first grid group (111) and a third grid group (113). In the width direction of the switch, the first grid group (111) is located on the side away from the contact system (2), while the third grid group (113) is arranged corresponding to the stationary contact (22). The first grid group (111) and the third grid group (113) form an L-shaped structure.

8. A switch according to claim 7, characterized in that: The air holes (122) on the side plate (12) correspond to the two sides of the air outlet end of the third grid plate group (113).

9. A switch according to claim 7, characterized in that: The arc-extinguishing chamber (1) further includes an orifice plate (13), the orifice plate (13) includes a first orifice plate (131), the first orifice plate (131) is located on the side of the air outlet of the first grid plate group (111), and a first air passage (401) is formed between the first orifice plate (131) and the inner wall of the housing (3).

10. A switch according to claim 9, characterized in that: The lateral airway (403) is connected to the first airway (401).

11. A switch according to claim 9, characterized in that: The first airway (401) is isolated from the lateral airway (403).

Images