Air outlet structure of parallel switch

Abstract

The utility model discloses an air outlet structure of a parallel switch, which comprises a contact system, an arc extinguish chamber I and an arc extinguish chamber II, the contact system is connected in parallel, the arc extinguish chamber I and the arc extinguish chamber II correspond to the contact system, and exhaust passages are arranged at the tail parts of the arc extinguish chamber I and the arc extinguish chamber II. The exhaust channels of the first arc extinguish chamber and the second arc extinguish chamber are communicated through an air channel located between the opposite side faces of the first arc extinguish chamber and the second arc extinguish chamber. The exhaust passages of the arc extinguish chambers of the parallel switches are communicated, so that the arc generated under the condition of single-stage breaking total current can be exhausted from the parallel arc extinguish chambers after being extinguished, and the breaking performance of the switches is further improved.

Description

Technical Field

[0001] This utility model belongs to the field of low-voltage switch technology, specifically relating to an outlet structure for a parallel switch. Background Technology

[0002] Circuit breakers are a crucial component of electrical distribution equipment, primarily used in industrial low-voltage power systems. They connect and disconnect current in power grid circuits and protect lines and power equipment from overload, undervoltage, short circuit, and single-phase grounding faults. The circuit breaker's function of interrupting overload or short-circuit currents is mainly accomplished through the arc-extinguishing chamber installed within it. When a fault current occurs in the circuit, and the current value exceeds the set protection range of the trip unit, the operating mechanism actuates, causing the moving and stationary contacts of the circuit breaker to quickly disconnect. The voltage between the moving and stationary contacts causes air dielectric discharge, generating a high-temperature electric arc. During the arc's combustion, the air temperature within the arc-extinguishing device rises sharply, accelerating air ionization. Simultaneously, driven by the magnetic field and fluid effects within the arc-extinguishing chamber, the arc is divided into multiple short arcs by multiple arc-isolating grids. The metal arc-isolating grids enhance the deionization effect of the arc, reducing its size and causing a rapid voltage increase, ultimately extinguishing the arc.

[0003] During the arc-extinguishing process of a circuit breaker's arc-extinguishing chamber, it is desirable for the arc to enter the chamber as much as possible and be extinguished, as shown in the attached diagram. Figure 1 As shown, most existing high-current low-voltage circuit breakers are composed of low-current products connected in parallel. For example, a large-frame circuit breaker is composed of multiple or two small-frame circuit breakers connected in parallel. This structure consists of two sets of moving and stationary contacts connected in parallel. Once there is a deviation in the separation synchronization of the mechanism, uneven current shunting will occur. In severe cases, a single-pole interruption of the entire current will occur. The parallel arc-extinguishing chambers in the existing technology are difficult to effectively extinguish the interruption arc under the condition of single-pole interruption of the entire current. Moreover, the extinguished arc can only be discharged through a single-pole arc-extinguishing chamber, which increases the difficulty of extinguishing the arc and thus reduces the breaking performance of the switch. Utility Model Content

[0004] The existing parallel arc-extinguishing chambers are insufficient to effectively extinguish the interrupted arc under single-stage full-current interruption conditions. Furthermore, the extinguished arc can only be discharged through a single-pole arc-extinguishing chamber, increasing the difficulty of arc discharge and thus reducing the switching performance. This invention provides an exhaust port structure for a parallel switch that connects the exhaust channels of the arc-extinguishing chambers of the parallel switch. This allows the arc generated under single-stage full-current interruption conditions to be discharged from the parallel arc-extinguishing chambers after extinguishment, thereby improving the switching performance.

[0005] Technical solution

[0006] In order to achieve the above technical purposes, the utility model provides a parallel switch's gas outlet structure, it includes the contact system and the arc extinguishing chamber one and the arc extinguishing chamber two corresponding with contact system in parallel, the tail of arc extinguishing chamber one and arc extinguishing chamber two has the exhaust passage, it is characterized by: the exhaust passage of arc extinguishing chamber one and arc extinguishing chamber two is communicated through the air channel between the side of arc extinguishing chamber one and arc extinguishing chamber two opposite.

[0007] In one of the embodiments, the air channel is a communicating vessel.

[0008] In one of the embodiments, the air channel where arc extinguishing chamber one and arc extinguishing chamber two are communicated is provided with a deionization structure one, and the air channel is provided with an exhaust port one.

[0009] In one of the embodiments, the tail exhaust port of arc extinguishing chamber one and arc extinguishing chamber two is directly provided with a gas outlet cover to communicate the exhaust passage and thereby gather and discharge the gas.

[0010] In one of the embodiments, the gas outlet cover is internally provided with a deionization structure two, and the gas gathered in the gas outlet cover is discharged through the exhaust port two of the gas outlet cover after deionization by the deionization structure two.

[0011] In one of the embodiments, the exhaust passage of arc extinguishing chamber one and / or arc extinguishing chamber two is provided with a deionization area, and the air channel is located at the lower position of the deionization area in the exhaust passage.

[0012] In one of the embodiments, in the three-phase circuit breaker, the exhaust position of the gas outlet cover of each phase after parallel arrangement is provided with an integral gas outlet cover.

[0013] In one of the embodiments, the shell of the parallel switch includes at least two cavities, and the contact system is respectively located in the two cavities, and the two cavities are separated by an insulation wall.

[0014] In one of the embodiments, the exhaust passage of arc extinguishing chamber one and arc extinguishing chamber two is at least partially located outside the shell, so that the air channel is located outside the shell to communicate the exhaust passage.

[0015] In one of the embodiments, the parts of arc extinguishing chamber one and arc extinguishing chamber two located in the shell are separated by an insulation wall.

[0016] Advantages

[0017] The utility model provides a kind of air outlet structure of parallel switch, it includes the contact system of parallel and the arc-extinguishing chamber one and arc-extinguishing chamber two corresponding with contact system, the tail portion of arc-extinguishing chamber one and arc-extinguishing chamber two has exhaust passage, the exhaust passage of arc-extinguishing chamber one and arc-extinguishing chamber two is connected by air passage between the side surface of arc-extinguishing chamber one and arc-extinguishing chamber two opposite each other.The exhaust passage of arc-extinguishing chamber of parallel switch is connected, so that arc extinguishing after being generated in single-stage breaking full current case can also be discharged from the arc-extinguishing chamber of parallel, and then the breaking performance of switch is improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will be briefly introduced to the drawings needed to be used in the embodiment, it should be understood that the following drawings only shows certain embodiments of the utility model, therefore should not be regarded as the limitation to the scope, for ordinary skilled person in the art comes, under the premise of not paying creative labor, can also obtain other related drawings according to these drawings.

[0019] Figure Figure 1 It is arc-extinguishing chamber air outlet schematic diagram in prior art;

[0020] Figure Figure 2 It is arc-extinguishing chamber air outlet product schematic diagram in the embodiment 1 of the utility model;

[0021] Figure Figure 3 It is arc-extinguishing chamber air outlet schematic diagram in the embodiment 1 of the utility model;

[0022] Figure Figure 4 It is arc-extinguishing chamber air outlet product schematic diagram in the embodiment 2 of the utility model;

[0023] Figure Figure 5 It is arc-extinguishing chamber air outlet schematic diagram in the embodiment 2 of the utility model;

[0024] Figure Figure 6 It is arc-extinguishing chamber air outlet product schematic diagram in the embodiment 3 of the utility model;

[0025] Figure Figure 7 It is arc-extinguishing chamber air outlet schematic diagram in the embodiment 3 of the utility model;

[0026] Figure Figure 8 It is arc-extinguishing chamber air outlet schematic diagram in the embodiment 3 of the utility model;

[0027] Figure Figure 9 It is arc-extinguishing chamber air outlet schematic diagram in the embodiment 4 of the utility model;

[0028] Figure Figure 10 It is arc-extinguishing chamber air outlet schematic diagram in the embodiment 5 of the utility model; DETAILED DESCRIPTION

[0029] So that the purposes, technical solutions and advantages of the embodiments of the present application are more apparent, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of the present application.

[0030] It should be noted that when a component is referred to as being "fixed to" or "set to" another component, it can be directly on the other component or there can be a middle component. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or there can be a middle component. The terms "vertical", "horizontal", "upper", "lower", "left", "right", and similar expressions used in the description of the present application are for the purpose of illustration only and do not indicate the only implementation.

[0031] In addition, the terms "first", "second", etc. are used only for descriptive purposes and should not be construed as indicating or implying relative importance or an indicated number of the technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0032] In the present application, unless otherwise explicitly specified and limited, the "on", "under", "above" and "over" of the first feature to the second feature can be that the first feature is in direct contact with the second feature, or the first feature is indirectly in contact with the second feature through an intermediate medium. Moreover, the "on", "above" and "over" of the first feature to the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the first feature is higher than the second feature in horizontal height. The "under", "below" and "under" of the first feature to the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the first feature is lower than the second feature in horizontal height.

[0033] Unless otherwise defined, all technical and scientific terms used in the specification of the present application have the same meaning as understood by those skilled in the art to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. The term "and / or" used in the specification of the present application includes any and all combinations of one or more related listed items.

[0034] Example 1

[0035] During the arc-extinguishing process, it is desirable for the arc to enter the arc-extinguishing chamber of a circuit breaker as much as possible and be extinguished. Existing high-current low-voltage circuit breakers are mostly composed of low-current products connected in parallel, such as a large-frame circuit breaker consisting of two or more small-frame circuit breakers connected in parallel. This structure consists of two sets of moving and stationary contacts connected in parallel. If there is a deviation in the synchronization of the separation mechanism, uneven current distribution will occur, and in severe cases, a single-pole interruption of the entire current may occur. The parallel arc-extinguishing chambers in existing technology are difficult to effectively extinguish the interrupted arc under single-pole interruption of the entire current, and the extinguished arc can only be discharged through a single-pole arc-extinguishing chamber, increasing the difficulty of arc discharge and thus reducing the breaking performance of the switch. To solve this problem, as shown in the appendix... Figure 2 and 3 As shown, this embodiment provides an exhaust port structure for a parallel switch, comprising parallel contact systems a and b, and arc-extinguishing chamber 1 and arc-extinguishing chamber 2 corresponding to contact systems a and b. The tail ends of arc-extinguishing chamber 1 and arc-extinguishing chamber 2 have exhaust channels 101 and 201. Openings are located on two facing sides of the tail ends of arc-extinguishing chamber 1 and arc-extinguishing chamber 2, forming an air passage 3 between the two openings. The exhaust channels 101 and 201 of arc-extinguishing chamber 1 and arc-extinguishing chamber 2 are connected through the air passage 3 located between the facing sides of arc-extinguishing chamber 1 and arc-extinguishing chamber 2. Taking a grid-type arc-extinguishing chamber as an example, exhaust channels 101 and 201 are formed between the tail end of the arc-extinguishing grid and the upper end of the arc-extinguishing chamber. Exhaust channels 101 and 201 are provided with exhaust ports 102 and 202. When the arc-extinguishing chamber interrupts the current, high-temperature, high-pressure gas is discharged from the exhaust channels 101 and 201 through the exhaust ports 102 and 202. Among them, an anti-free ionization device is provided in the upper part of the inner cavity of the exhaust channel 101, 201 near the exhaust port 102, 202. At this time, the exhaust channel 101, 201 has an anti-free ionization function, and the upper part of the exhaust channel 101, 201 becomes the anti-free ionization region 103, 203.

[0036] Further, in the embodiment, the gas passage 3 is a communication vessel L, and the arc extinguishing chamber one 1 and the arc extinguishing chamber two 2 are connected by the communication vessel L to communicate the exhaust passages 101, 201. The communication vessel increases the area of the deionization and reduces the arc flying. On the other hand, the communication vessel increases the flow area, reduces the flow velocity impacting the top cover of the arc extinguishing chamber, reduces the internal pressure of the arc extinguishing chamber breaking large current, and avoids the top cover of the arc extinguishing chamber breaking. At this time, the openings on the two sides of the tail of the arc extinguishing chamber one 1 and the arc extinguishing chamber two 2 (i.e. the two ends of the communication vessel L) are located below the deionization area 103, 203 of the upper part of the exhaust passage 101, 201, i.e. the communication vessel L connects the lower part of the deionization area 103, 203 of the exhaust passage 101, 201. When one arc extinguishing chamber bears a large breaking current, the high-temperature and high-pressure gas is exhausted through the exhaust port after deionization of the deionization structure of the arc extinguishing chamber bearing the large breaking current, and part of the high-temperature and high-pressure gas enters the lower part of the deionization area of the other parallel arc extinguishing chamber through the communication vessel L located below the deionization area, and then is exhausted through the exhaust port after deionization of the deionization area of the other parallel arc extinguishing chamber.

[0037] In the embodiment, the contact systems a, b and the corresponding arc extinguishing chamber one 1 and arc extinguishing chamber two 2 can have different forms relative to the shell Q and the insulation wall K, which are as follows:

[0038] (I) The shell Q of the parallel switch includes at least two chambers m, n, the contact systems a, b and the corresponding arc extinguishing chamber one 1 and arc extinguishing chamber two 2 are located in the two chambers m, n respectively, the contact system a and the contact system b are separated by the insulation wall K, and the deionization areas 103, 203 of the arc extinguishing chamber one and the arc extinguishing chamber two 2 are at least partially not separated by the insulation wall K, so that the gas passage 3 communicates the lower part of the deionization areas 103, 203, and the rest of the arc extinguishing chamber one 1 and the arc extinguishing chamber two 2 are separated by the insulation wall K.

[0039] (II) The shell Q of the parallel switch includes at least two chambers m, n, the contact systems a, b and the corresponding arc extinguishing chamber one 1 and arc extinguishing chamber two 2 are located in the two chambers m, n respectively, the contact system a and the contact system b are separated by the insulation wall K, and the arc extinguishing chamber one 1 and the arc extinguishing chamber two 2 are not separated by the insulation wall K.

[0040] (III) The shell Q of the parallel switch includes at least two chambers m, n, the contact systems a, b are located in the two chambers m, n respectively and separated by the insulation wall K. The deionization areas 103, 203 of the arc extinguishing chamber one 1 and the arc extinguishing chamber two 2 are at least partially located outside the shell Q, so that the gas passage 3 is located outside the shell to communicate the lower part of the deionization areas 103, 203. The parts of the arc extinguishing chamber one 1 and the arc extinguishing chamber two 2 located in the shell m, n are separated by the insulation wall K.

[0041] (IV) The housing Q of the parallel switch comprises at least two chambers m and n, with contact systems a and b located in the two chambers m and n respectively, separated by an insulating wall K. The de-ionization regions 103 and 203 of arc-extinguishing chamber 1 and arc-extinguishing chamber 2 are at least partially located outside the housing Q, such that the air passage 3 is located outside the housing, communicating with the lower portion of the de-ionization regions 103 and 203. Contact systems a and b are separated by the insulating wall K. The portions of arc-extinguishing chamber 1 and arc-extinguishing chamber 2 located inside the housing Q are not separated by the insulating wall K.

[0042] The working process of this embodiment is as follows: When the parallel contact systems a and b have good synchronicity, the two arc-extinguishing systems independently extinguish the arc, eliminate free ionization, and exhaust gas; when there is a difference in the synchronicity of the parallel contact systems, arc-extinguishing chamber 1 or arc-extinguishing chamber 2 may interrupt a large current. When one arc-extinguishing chamber bears a large interrupting current, the high-temperature and high-pressure gas is eliminated from the arc-extinguishing chamber bearing the large interrupting current through the elimination structure and then discharged through its outlet. At the same time, some high-temperature and high-pressure gas enters another parallel arc-extinguishing chamber through the communicating vessel L, and then is eliminated from the arc-extinguishing chamber through the elimination structure and discharged through its outlet.

[0043] Example 2

[0044] As attached Figure 4 and 5 As shown, in this embodiment, the communicating vessel L described in Embodiment 1 is not provided at the air passage 3 connecting the arc-extinguishing chamber 1 and the arc-extinguishing chamber 2. This air passage 3 is a channel for gas flow between the arc-extinguishing chamber 1 and the arc-extinguishing chamber 2, formed directly using part of the switch housing structure. An anti-freezing structure 301 is provided at this air passage 3, and an exhaust port 302 is also provided on the air passage 3. The working process of this embodiment is as follows: (See attached diagram) Figure 5 As shown, when the parallel contact systems have good synchronicity, the two arc-extinguishing systems independently extinguish the arc, eliminate free ionization, and vent air; as shown in the attached figure. Figure 5 As shown, when there is a difference in the synchronicity of the operation of the parallel contact systems, either arc-extinguishing chamber 1 or arc-extinguishing chamber 2 may interrupt a larger current. When one arc-extinguishing chamber bears a larger interrupting current, the high-temperature and high-pressure gas is deionized from the deionization structure in that arc-extinguishing chamber and discharged through its outlet. Simultaneously, some high-temperature and high-pressure gas is discharged from the air passage 3 through the opening located below the deionization regions 103 and 203, deionized by the deionization structure 301, and then discharged through the exhaust port 302 on the air passage 3. At the same time, some high-temperature and high-pressure gas can also enter the area below the deionization region of another parallel arc-extinguishing chamber through the air passage 3, and then be deionized through the deionization region of that other parallel arc-extinguishing chamber before being discharged through its outlet. Other structures are the same as in Example 1.

[0045] Example 3

[0046] As shown in the accompanying drawings Figure 6 and 7 In this embodiment, the exhaust outlet 102, 202 of the arc-extinguishing chamber one 1 and the arc-extinguishing chamber two 2 is directly provided with an exhaust cover 4 to connect the exhaust passages 101, 201 to collect and discharge the gas. In this embodiment, the exhaust passages 101, 201 of the arc-extinguishing chamber one 1 and the arc-extinguishing chamber two 2 are not provided with a deionization structure, and the deionization structure two 401 is arranged in the exhaust cover 4. When the parallel contact systems a, b have good synchronization, the two arc-extinguishing systems independently extinguish the arc, and then enter the exhaust cover 4, pass through the deionization structure two 401 for deionization, and are discharged through the exhaust outlet two 402 on the exhaust cover 4. When the parallel contact systems have different synchronization, there may be a large current broken in the arc-extinguishing chamber one 1 or the arc-extinguishing chamber two 2. When one arc-extinguishing chamber bears a large broken current, the high-temperature and high-pressure gas from the arc-extinguishing chamber bearing the large broken current enters the exhaust cover 4, passes through the deionization structure two 401 for deionization, and is discharged through the exhaust outlet two 402 on the exhaust cover 4.

[0047] As shown in the accompanying drawings Figure 8 In this embodiment, when this embodiment is one phase of a three-phase circuit breaker, each phase has an exhaust cover 4, and the three-phase circuit breaker is further provided with an overall exhaust cover 5 outside the three exhaust covers 4 to further collect and process the discharged gas. The other structures are the same as those of embodiment 1.

[0048] Embodiment 4

[0049] As shown in the accompanying drawings Figure 9 In this embodiment, the exhaust passages 101, 201 of the arc-extinguishing chamber one 1 and / or the arc-extinguishing chamber two 2 are provided with the deionization structure three 101a, 201a, and the exhaust cover 4 is not provided with a deionization structure inside. The exhaust cover 4 connects the exhaust passages 101, 201 to collect and discharge the gas. The other structures are the same as those of embodiment 3. The other structures are the same as those of embodiment 3.

[0050] Embodiment 5

[0051] As shown in the accompanying drawings Figure 10 In this embodiment, the exhaust passages 101, 201 of the arc-extinguishing chamber one 1 and / or the arc-extinguishing chamber two 2 are provided with the deionization structure three 101a, 201a, the exhaust cover 4 connects the exhaust passages 101, 201, and the exhaust cover 4 is provided with the deionization structure two 401 inside. The gas collected in the exhaust cover 4 passes through the deionization structure two 401 for deionization and is discharged through the exhaust outlet two 402 on the exhaust cover 4. The other structures are the same as those of embodiment 3. The other structures are the same as those of embodiment 3.

[0052] The utility model provides a kind of air outlet structure of parallel switch, it includes the contact system a,b of parallel and the arc-extinguishing chamber one 1 and arc-extinguishing chamber two 2 corresponding with contact system a,b, the tail portion of arc-extinguishing chamber one 1 and arc-extinguishing chamber two 2 has exhaust passage 101,201, and the exhaust passage 101,201 of arc-extinguishing chamber one 1 and arc-extinguishing chamber two 2 is connected by air passage 3 between the side surface of arc-extinguishing chamber one 1 and arc-extinguishing chamber two 2 opposite each other.The exhaust passage of arc-extinguishing chamber of parallel switch is connected, so that arc produced under the condition of single-stage breaking full current can also be discharged from the arc-extinguishing chamber of parallel, to further improve the breaking performance of switch.The exhaust passage of arc-extinguishing chamber of parallel switch is connected, so that arc produced under the condition of single-stage breaking full current can also be discharged from the arc-extinguishing chamber of parallel, to further improve the breaking performance of switch.

[0053] The technical features of the above-described embodiments can be combined arbitrarily, and to make the description concise, not all possible combinations of the technical features in the above-described embodiments are described, however, as long as the combinations of the technical features do not exist contradictory, it should be considered as the scope of the present disclosure.

[0054] The above-described embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as the limitation of the patent scope of the present application. It should be pointed out that, for ordinary skilled in the art, without departing from the concept of the present application, several modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. An exhaust port structure for a parallel switch, comprising a parallel contact system (a, b) and an arc-extinguishing chamber one (1) and an arc-extinguishing chamber two (2) corresponding to the contact system (a, b), wherein the tail ends of the arc-extinguishing chamber one (1) and the arc-extinguishing chamber two (2) have exhaust channels (101, 201), characterized in that: The exhaust channels (101, 201) of the first arc-extinguishing chamber (1) and the second arc-extinguishing chamber (2) are connected by an air passage (3) located between the facing sides of the first arc-extinguishing chamber (1) and the second arc-extinguishing chamber (2).

2. The air outlet structure of a parallel switch as described in claim 1, characterized in that: The airway (3) is a communicating vessel (L).

3. The air outlet structure of a parallel switch as described in claim 1, characterized in that: An anti-free structure (301) is provided at the air passage (3) connecting the first arc-extinguishing chamber (1) and the second arc-extinguishing chamber (2), and an exhaust port (302) is provided on the air passage (3).

4. The air outlet structure of a parallel switch as described in claim 1, characterized in that: The exhaust ports (102, 202) at the tail end of the arc-extinguishing chamber 1 (1) and arc-extinguishing chamber 2 (2) are directly equipped with exhaust hoods (4) to connect the exhaust channels (101, 201) so as to collect and discharge the gas.

5. The air outlet structure of a parallel switch as described in claim 4, characterized in that: The exhaust hood (4) is equipped with a second deionization structure (401). The gas collected in the exhaust hood (4) is deionized by the second deionization structure (401) and then discharged through the second exhaust port (402) on the exhaust hood (4).

6. The air outlet structure of a parallel switch as described in claim 1, characterized in that: The exhaust channels (101, 201) of the first (1) and / or the second (2) of the arc-extinguishing chamber are provided with de-free zones (103, 203), and the air passage (3) is located at the lower part of the de-free zones (103, 203) in the exhaust channels (101, 201).

7. The air outlet structure of a parallel switch as described in claim 4, characterized in that: In a three-phase circuit breaker, an integral vent hood (5) is installed at the exhaust position of each phase's vent hood (4) after they are arranged in parallel.

8. The outlet structure of a parallel switch as described in claim 1, characterized in that: The housing (Q) of the parallel switch includes at least two chambers (m,n), and the contact systems (a,b) are located in the two chambers (m,n) respectively, and the two chambers (m,n) are separated by an insulating wall (k).

9. The air outlet structure of a parallel switch as described in claim 8, characterized in that: The exhaust passages (101, 201) of the first arc-extinguishing chamber (1) and the second arc-extinguishing chamber (2) are at least partially located outside the housing (Q), such that the air passage (3) is located outside the housing (Q) and communicates with the exhaust passages (101, 201).

10. The air outlet structure of a parallel switch as described in claim 9, characterized in that: The portions of arc-extinguishing chamber one (1) and arc-extinguishing chamber two (2) located within the housing (Q) are separated by an insulating wall (k).

Images