Circuit breaker

Abstract

Disclosed is a circuit breaker, including a housing 1 and an arc extinguishing chamber 2 arranged in an interior space of the housing 1, wherein a gas outlet passage is formed in a first sidewall 13 of the housing 1, the gas outlet passage is designed to communicate the interior space of the housing with a surrounding environment of the circuit breaker, at least one deionizing component 3, 4 is arranged between the arc extinguishing chamber 2 and the gas outlet passage, and the deionizing component 3, 4 is configured to allow conductive gases to pass therethrough and designed to cool the conductive gases therethrough. By the circuit breaker having the above-described configuration, the conductive gases are kept inside the housing of the circuit breaker and prevented from flying out of the circuit breaker, thus achieving zero flashover function.

Description

TECHNICAL FIELD

[0001] This disclosure relates to relates to a low-voltage electrical appliance, and in particular to a circuit breaker.BACKGROUND

[0002] The circuit breaker is applied to the field of power distribution, and as shown in FIG. 1, it mainly includes a housing 1, as well as a moving contact terminal, a fixed contact terminal 7 and an arc extinguishing chamber 2 that are installed in an interior space of the housing. The circuit breaker realizes the on and off of current through connection and disconnection between a moving contact of the moving contact terminal and a fixed contact of the fixed contact terminal. When a line is overloaded or short-circuited, under the action of a protection unit, the moving contact terminal will separate from the fixed contact terminal, thus generating an arc. In this case, gas inside the circuit breaker will be ionized under the effect of a high temperature and a strong electric field to produce a large amount of ionized gas. Moreover, under the action of the arc, a large amount of metal vapor is also generated in the arc extinguishing chamber. If the ionized gas and metal vapor fly out of the circuit breaker via a gas outlet passage formed in a first sidewall 13 of the housing (gas flow paths are shown by arrows in FIG. 1), it is harmful to surrounding circuits and power devices, causing a potential safety hazard. At present, it is generally used to install a terminal cover outside the circuit breaker to prevent the ionized gas and metal vapor from diffusing into the surrounding environment of the circuit breaker, but this method will occupy a large installation space and increase the production cost of the circuit breaker.

[0003] US 2017 / 278653 A1 discloses a circuit breaker according to the preamble of claim 1.SUMMARY

[0004] To solve the problems described above, this disclosure provides a circuit breaker in which a deionizing component is arranged between the arc extinguishing chamber and the gas outlet passage in the interior space of the housing, thereby preventing the ionized gas and the metal vapor flying out of the circuit breaker via the gas outlet passages to achieve zero flashover function. Moreover, such a circuit breaker does not need to increase the original occupation space, and greatly reduces the manufacturing cost.

[0005] This disclosure provides a circuit breaker as defined by the independent claim 1.

[0006] In accordance with the technical solution of this disclosure, by means of arranging at least one deionizing component in the interior space of the housing, it is not required to install a terminal cover outside the circuit breaker, not like the prior art in which a terminal cover is installed outside the circuit breaker, resulting in increase of the original occupation space. Further, the technical solution of this disclosure only needs to arrange the deionizing component within a reduced space range and thus requires less material than the prior art, which significantly reduces the manufacturing cost.

[0007] Preferably, the deionizing component is made of one or both of a metal braided mesh or a foam metal.

[0008] Preferably, the metal woven mesh is made of a steel material, and the foam metal is made of a steel material, a ceramic material or a nickel-based alloy.

[0009] Preferably, when the foam metal is made of a steel material or a nickel-based alloy, an outer surface of the foam metal is also coated with a ceramic compound coating.

[0010] Preferably, the first deionizing component extends longitudinally across the entire arc extinguishing chamber.

[0011] Preferably, the second deionizing component is arranged at a first end of the gas outlet passage close to the interior space of the housing.

[0012] Preferably, an insulation sheet is further arranged at the first end of the gas outlet passage, the insulation sheet is provided with at least one gas inlet hole which is in gas communication with the gas outlet passage, wherein the insulation sheet is arranged between the first end and the second deionizing component.

[0013] According to the invention, the circuit breaker includes a support frame for fixedly installing the first deionizing component, and the first deionizing component is received in the interior space of the housing in a relatively non-movable manner by means of the support frame.

[0014] According to the invention, the housing includes a base and a cover located above the base, and the gas outlet passage is formed on a vertically extending section of the cover. The circuit breaker further includes a fixed contact terminal located below the arc extinguishing chamber in the interior space of the housing, the cover has a second sidewall extending above the arc extinguishing chamber, and the support frame is positioned relatively non-movably with respect to the housing by means of a first limiting component fixedly installed on the fixed contact terminal and a second limiting component fixedly installed on the second sidewall.

[0015] Preferably, the second deionizing component is relatively non-movably clamped between a lower surface of the second sidewall and an upper end surface of the base facing the cover.BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Embodiments of the device and method of this disclosure are further described in detail below with reference to the accompanying drawings, where: FIG. 1 is a schematic diagram of an internal structure of a circuit breaker in a prior art; FIG. 2 is a schematic diagram of an internal structure of a circuit breaker according to this disclosure; FIG. 3 is an enlarged schematic diagram of the part indicated by the dashed box in FIG. 2; FIG. 4 is a schematic diagram of an assembly of a first deionizing component and a support frame; FIGS. 5 and 6 are schematic diagrams of a second deionizing component and an insulation sheet viewed from different angles, respectively; and FIG. 7 is a schematic diagram of an arc extinguishing chamber in the prior art. LIST OF REFERENCE NUMERALS

[0017] 1. housing; 11. base; 12. cover; 13. first sidewall; 14. second sidewall; 2. arc extinguishing chamber; 21. arc extinguishing chamber side plate; 3. first deionizing component; 4. second deionizing component; 5. support frame; 6. insulation sheet; 7. fixed contact terminal; 8. First limiting component; and 9. second limiting component.DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] A schematic solution of the structure disclosed by this disclosure is described in detail with reference to the accompanying drawings. Although providing the accompanying drawings is to present some implementations of the present utility model, the accompanying drawings do not need to be drawn according to the size of the specific implementation schemes, and certain features can be enlarged, removed, or locally exploded to better illustrate and explain the disclosure of the present utility model.

[0019] Some directional terms used in the following to describe the accompanying drawings should be construed as having normal meanings thereof and refer to those directions involved when the accompanying drawings are viewed normally. For example, "upper," "lower," "left," and "right" refer to top, bottom, left-hand and right-hand sides in view of FIGS. 1 and 2, respectively.

[0020] In addition, the ionized gas and the metal vapor, as well as other conductive gases that may be generated in the arc extinguishing chamber under the action of high-temperature arc are collectively referred to herein as conductive gases.

[0021] FIG. 2 shows a schematic structural diagram of the circuit breaker according to this disclosure. Similar to the prior art, the circuit breaker includes a housing 1 and an arc extinguishing chamber 2 arranged in an interior space of the housing 1, wherein the arc extinguishing chamber 2 is relatively non-movably arranged in the interior space of the housing 1. A fixed contact terminal 7 and a moving contact terminal are also fixedly arranged in the housing 1. The housing 1 has a first sidewall 13 and the first sidewall 13 is provided with a gas outlet passage so that conductive gases generated inside the housing 1 can flow from the interior space of the housing 1 to the surrounding environment of the circuit breaker via the gas outlet passage.

[0022] Typically, one of vertically extending sidewalls of the housing 1 is selected as the first sidewall 13, and the gas outlet passage on the first sidewall 13 is located above the diagonal of the arc extinguishing chamber 2, with a specific position referring to FIG. 1. Certainly, those skilled in the art should understand that the possible arrangement position of the gas outlet passage is not limited to the situation shown in FIG. 1. The housing 1 includes a base 11 and a cover 12, wherein the cover body 12 is located above the base 11. The cover 12 includes a second sidewall 14 extending above the arc extinguishing chamber 2 and a vertically extending section. The gas outlet passage is formed on the vertically extending section of the cover 12.

[0023] With reference to FIG. 3 again, in order to prevent the conductive gases from flying out of the housing 1 via the gas outlet passage, at least one deionizing component is arranged between the arc extinguishing chamber 2 and the gas outlet passage, and the the gas outlet passage can allow the conductive gases to pass therethrough and also to cool the conductive gases therethrough.

[0024] Specifically, the deionizing component can be configured as a metal braided mesh. FIG. 4 shows the configuration when the deionizing component can be configured as a metal braided mesh. The conductive gases can pass through the metal braided mesh via mesh holes.

[0025] Further, the deionizing component may also be made of a foam metal with a large number of air holes therein, the air holes can be connected to form a through passage through which the conductive gases can pass through the metal foam.

[0026] Further, the deionizing component can also be formed by stacking a plurality of metal plates, wherein each metal plate needs to have 10 through holes, and the through holes in each metal plate need to be able to be connected into at least one through passage when the metal plates are stacked together to allow the conductive gases to pass through.

[0027] The metal braided mesh or metal plate described above is preferably made of steel, copper, or other materials, especially preferably a steel material.

[0028] The foam metal can be made of a steel material, a ceramic material or a nickel-based alloy. When the foam material is made of a steel material or a nickel-based alloy, an outer surface of the foam metal is also coated with a ceramic compound coating. The ceramic compound coating has a physical property of high-temperature resistance, which can improve the high-temperature resistance of the metal foam

[0029] The deionizing component having the above properties can cool the conductive gases passing therethrough, so that the ionized gas is deionized or the metal vapor becomes large metal particles and stays inside the product.

[0030] The preferred arrangement of the deionizing components is detailed below, but is not limited to the following situations.

[0031] Referring to FIG. 3, a first deionizing component 3 is arranged between the arc extinguishing chamber 2 and the gas outlet passage. The first deionizing component 3 extends along its longitudinal direction and extends through the entire arc extinguishing chamber 2. As a result, the conductive gases generated from the arc extinguishing chamber 2 must pass through the first deionizing component 3 before entering the gas outlet passage.

[0032] Also preferably, a second deionizing component 4 is arranged at a first end of the gas outlet passage close to the interior space of the housing 1. Therefore, by means of additionally adding a second deionizing component 4 at the first end of the gas outlet passage close to the interior space of the housing 1, it is further ensured that all the conductive gases that escapes to the external environment through the gas outlet passage under various arc conditions are deionized to achieve "zero flashover".

[0033] It is known in the prior art that an insulation sheet 6 has been arranged at the first end, referring to FIGS. 5 and 6, the insulation sheet 6 is provided with a plurality of gas inlet holes which can be in gas communication with the gas outlet passage without blocking gas from going in and out of the gas outlet passage. The insulation sheet 6 is able to prevent foreign objects in the surrounding environment from entering the interior space of the housing via the gas outlet passage. In the case of the configuration with the second deionizing component 4, the insulation sheet 6 can be arranged between the first end of the gas outlet passage and the second deionizing component 4.

[0034] It will be appreciated by those skilled in the art that the first deionizing component 3 and the second deionizing component 4 do not necessary employ the same material and configuration. For example, the first deionizing component 3 can employ a copper-made metal braided mesh and the second deionizing component 4 can employ a steel-made foam metal. In addition, a plurality of deionizing components 3 and a plurality of second deionizing components 4 may be provided according to factors such as desired effects, selected materials, material thicknesses, and the like.

[0035] Referring to FIGS. 3 and 4, a support frame 5 is also provided. The first deionizing component 3 is fixedly installed on the support frame 5, for example, embedded within the support frame 5, so that the first deionizing component is received in the interior space of the housing 1 in a non-movable manner by means of the support frame 5.

[0036] According to not claimed embodiments, the support frame 5 may be fixedly connected to the housing 1 and / or the fixed contact terminal 7 located below the arc extinguishing chamber 2 by means of a fastening tool, for example a screw or a clamp. The support frame 5 may also be fixed directly to an arc extinguishing chamber side plate 21 of the arc extinguishing chamber 2 shown in FIG. 7.

[0037] According to the invention, the first limiting component 8 and the second limiting component 9 are provided, respectively, wherein the first limiting component 8 is fixedly installed on the fixed contact terminal 7, the second limiting component 9 is fixedly installed on the second sidewall 14 of the housing 1, and lower and upper borders of the support frame 5 are limited from relative movement relative to the housing 1 through shape fit with the first limiting component 8 and the second limiting component 9 respectively. As shown, for example, in FIG. 3, the first limiting component 8 limits the leftward movement of the lower border, the second limiting component 9 limits the rightward movement of the upper border, the support frame 5 is also dimensionally designed such that the upper end surface of the upper border and the lower end surface of the lower border abut against the second limiting component 9 and the first limiting component 8 respectively so as to be limited from moving up and down.

[0038] The second deionizing component 4 may also be connected to the housing 1 by means of other tools. However, due to the limitation of space, it is preferred that the second deionizing component 4 is clamped between a lower surface of the second sidewall 14 and an upper end surface of the base 11 facing the cover 12.

[0039] Since the deionizing components are arranged in the interior space of the housing, there is no need to increase the original occupation space. Less material is required, thus greatly reducing the manufacturing cost.

Examples

Embodiment Construction

[0018]A schematic solution of the structure disclosed by this disclosure is described in detail with reference to the accompanying drawings. Although providing the accompanying drawings is to present some implementations of the present utility model, the accompanying drawings do not need to be drawn according to the size of the specific implementation schemes, and certain features can be enlarged, removed, or locally exploded to better illustrate and explain the disclosure of the present utility model.

[0019]Some directional terms used in the following to describe the accompanying drawings should be construed as having normal meanings thereof and refer to those directions involved when the accompanying drawings are viewed normally. For example, "upper," "lower," "left," and "right" refer to top, bottom, left-hand and right-hand sides in view of FIGS. 1 and 2, respectively.

[0020]In addition, the ionized gas and the metal vapor, as well as other conductive gases that may be generated i...

TECHNICAL FIELD

[0001] This disclosure relates to relates to a low-voltage electrical appliance, and in particular to a circuit breaker.BACKGROUND

[0002] The circuit breaker is applied to the field of power distribution, and as shown in FIG. 1, it mainly includes a housing 1, as well as a moving contact terminal, a fixed contact terminal 7 and an arc extinguishing chamber 2 that are installed in an interior space of the housing. The circuit breaker realizes the on and off of current through connection and disconnection between a moving contact of the moving contact terminal and a fixed contact of the fixed contact terminal. When a line is overloaded or short-circuited, under the action of a protection unit, the moving contact terminal will separate from the fixed contact terminal, thus generating an arc. In this case, gas inside the circuit breaker will be ionized under the effect of a high temperature and a strong electric field to produce a large amount of ionized gas. Moreover, under the action of the arc, a large amount of metal vapor is also generated in the arc extinguishing chamber. If the ionized gas and metal vapor fly out of the circuit breaker via a gas outlet passage formed in a first sidewall 13 of the housing (gas flow paths are shown by arrows in FIG. 1), it is harmful to surrounding circuits and power devices, causing a potential safety hazard. At present, it is generally used to install a terminal cover outside the circuit breaker to prevent the ionized gas and metal vapor from diffusing into the surrounding environment of the circuit breaker, but this method will occupy a large installation space and increase the production cost of the circuit breaker.

[0003] US 2017 / 278653 A1 discloses a circuit breaker according to the preamble of claim 1.SUMMARY

[0004] To solve the problems described above, this disclosure provides a circuit breaker in which a deionizing component is arranged between the arc extinguishing chamber and the gas outlet passage in the interior space of the housing, thereby preventing the ionized gas and the metal vapor flying out of the circuit breaker via the gas outlet passages to achieve zero flashover function. Moreover, such a circuit breaker does not need to increase the original occupation space, and greatly reduces the manufacturing cost.

[0005] This disclosure provides a circuit breaker as defined by the independent claim 1.

[0006] In accordance with the technical solution of this disclosure, by means of arranging at least one deionizing component in the interior space of the housing, it is not required to install a terminal cover outside the circuit breaker, not like the prior art in which a terminal cover is installed outside the circuit breaker, resulting in increase of the original occupation space. Further, the technical solution of this disclosure only needs to arrange the deionizing component within a reduced space range and thus requires less material than the prior art, which significantly reduces the manufacturing cost.

[0007] Preferably, the deionizing component is made of one or both of a metal braided mesh or a foam metal.

[0008] Preferably, the metal woven mesh is made of a steel material, and the foam metal is made of a steel material, a ceramic material or a nickel-based alloy.

[0009] Preferably, when the foam metal is made of a steel material or a nickel-based alloy, an outer surface of the foam metal is also coated with a ceramic compound coating.

[0010] Preferably, the first deionizing component extends longitudinally across the entire arc extinguishing chamber.

[0011] Preferably, the second deionizing component is arranged at a first end of the gas outlet passage close to the interior space of the housing.

[0012] Preferably, an insulation sheet is further arranged at the first end of the gas outlet passage, the insulation sheet is provided with at least one gas inlet hole which is in gas communication with the gas outlet passage, wherein the insulation sheet is arranged between the first end and the second deionizing component.

[0013] According to the invention, the circuit breaker includes a support frame for fixedly installing the first deionizing component, and the first deionizing component is received in the interior space of the housing in a relatively non-movable manner by means of the support frame.

[0014] According to the invention, the housing includes a base and a cover located above the base, and the gas outlet passage is formed on a vertically extending section of the cover. The circuit breaker further includes a fixed contact terminal located below the arc extinguishing chamber in the interior space of the housing, the cover has a second sidewall extending above the arc extinguishing chamber, and the support frame is positioned relatively non-movably with respect to the housing by means of a first limiting component fixedly installed on the fixed contact terminal and a second limiting component fixedly installed on the second sidewall.

[0015] Preferably, the second deionizing component is relatively non-movably clamped between a lower surface of the second sidewall and an upper end surface of the base facing the cover.BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Embodiments of the device and method of this disclosure are further described in detail below with reference to the accompanying drawings, where: FIG. 1 is a schematic diagram of an internal structure of a circuit breaker in a prior art; FIG. 2 is a schematic diagram of an internal structure of a circuit breaker according to this disclosure; FIG. 3 is an enlarged schematic diagram of the part indicated by the dashed box in FIG. 2; FIG. 4 is a schematic diagram of an assembly of a first deionizing component and a support frame; FIGS. 5 and 6 are schematic diagrams of a second deionizing component and an insulation sheet viewed from different angles, respectively; and FIG. 7 is a schematic diagram of an arc extinguishing chamber in the prior art. LIST OF REFERENCE NUMERALS

[0017] 1. housing; 11. base; 12. cover; 13. first sidewall; 14. second sidewall; 2. arc extinguishing chamber; 21. arc extinguishing chamber side plate; 3. first deionizing component; 4. second deionizing component; 5. support frame; 6. insulation sheet; 7. fixed contact terminal; 8. First limiting component; and 9. second limiting component.DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] A schematic solution of the structure disclosed by this disclosure is described in detail with reference to the accompanying drawings. Although providing the accompanying drawings is to present some implementations of the present utility model, the accompanying drawings do not need to be drawn according to the size of the specific implementation schemes, and certain features can be enlarged, removed, or locally exploded to better illustrate and explain the disclosure of the present utility model.

[0019] Some directional terms used in the following to describe the accompanying drawings should be construed as having normal meanings thereof and refer to those directions involved when the accompanying drawings are viewed normally. For example, "upper," "lower," "left," and "right" refer to top, bottom, left-hand and right-hand sides in view of FIGS. 1 and 2, respectively.

[0020] In addition, the ionized gas and the metal vapor, as well as other conductive gases that may be generated in the arc extinguishing chamber under the action of high-temperature arc are collectively referred to herein as conductive gases.

[0021] FIG. 2 shows a schematic structural diagram of the circuit breaker according to this disclosure. Similar to the prior art, the circuit breaker includes a housing 1 and an arc extinguishing chamber 2 arranged in an interior space of the housing 1, wherein the arc extinguishing chamber 2 is relatively non-movably arranged in the interior space of the housing 1. A fixed contact terminal 7 and a moving contact terminal are also fixedly arranged in the housing 1. The housing 1 has a first sidewall 13 and the first sidewall 13 is provided with a gas outlet passage so that conductive gases generated inside the housing 1 can flow from the interior space of the housing 1 to the surrounding environment of the circuit breaker via the gas outlet passage.

[0022] Typically, one of vertically extending sidewalls of the housing 1 is selected as the first sidewall 13, and the gas outlet passage on the first sidewall 13 is located above the diagonal of the arc extinguishing chamber 2, with a specific position referring to FIG. 1. Certainly, those skilled in the art should understand that the possible arrangement position of the gas outlet passage is not limited to the situation shown in FIG. 1. The housing 1 includes a base 11 and a cover 12, wherein the cover body 12 is located above the base 11. The cover 12 includes a second sidewall 14 extending above the arc extinguishing chamber 2 and a vertically extending section. The gas outlet passage is formed on the vertically extending section of the cover 12.

[0023] With reference to FIG. 3 again, in order to prevent the conductive gases from flying out of the housing 1 via the gas outlet passage, at least one deionizing component is arranged between the arc extinguishing chamber 2 and the gas outlet passage, and the the gas outlet passage can allow the conductive gases to pass therethrough and also to cool the conductive gases therethrough.

[0024] Specifically, the deionizing component can be configured as a metal braided mesh. FIG. 4 shows the configuration when the deionizing component can be configured as a metal braided mesh. The conductive gases can pass through the metal braided mesh via mesh holes.

[0025] Further, the deionizing component may also be made of a foam metal with a large number of air holes therein, the air holes can be connected to form a through passage through which the conductive gases can pass through the metal foam.

[0026] Further, the deionizing component can also be formed by stacking a plurality of metal plates, wherein each metal plate needs to have 10 through holes, and the through holes in each metal plate need to be able to be connected into at least one through passage when the metal plates are stacked together to allow the conductive gases to pass through.

[0027] The metal braided mesh or metal plate described above is preferably made of steel, copper, or other materials, especially preferably a steel material.

[0028] The foam metal can be made of a steel material, a ceramic material or a nickel-based alloy. When the foam material is made of a steel material or a nickel-based alloy, an outer surface of the foam metal is also coated with a ceramic compound coating. The ceramic compound coating has a physical property of high-temperature resistance, which can improve the high-temperature resistance of the metal foam

[0029] The deionizing component having the above properties can cool the conductive gases passing therethrough, so that the ionized gas is deionized or the metal vapor becomes large metal particles and stays inside the product.

[0030] The preferred arrangement of the deionizing components is detailed below, but is not limited to the following situations.

[0031] Referring to FIG. 3, a first deionizing component 3 is arranged between the arc extinguishing chamber 2 and the gas outlet passage. The first deionizing component 3 extends along its longitudinal direction and extends through the entire arc extinguishing chamber 2. As a result, the conductive gases generated from the arc extinguishing chamber 2 must pass through the first deionizing component 3 before entering the gas outlet passage.

[0032] Also preferably, a second deionizing component 4 is arranged at a first end of the gas outlet passage close to the interior space of the housing 1. Therefore, by means of additionally adding a second deionizing component 4 at the first end of the gas outlet passage close to the interior space of the housing 1, it is further ensured that all the conductive gases that escapes to the external environment through the gas outlet passage under various arc conditions are deionized to achieve "zero flashover".

[0033] It is known in the prior art that an insulation sheet 6 has been arranged at the first end, referring to FIGS. 5 and 6, the insulation sheet 6 is provided with a plurality of gas inlet holes which can be in gas communication with the gas outlet passage without blocking gas from going in and out of the gas outlet passage. The insulation sheet 6 is able to prevent foreign objects in the surrounding environment from entering the interior space of the housing via the gas outlet passage. In the case of the configuration with the second deionizing component 4, the insulation sheet 6 can be arranged between the first end of the gas outlet passage and the second deionizing component 4.

[0034] It will be appreciated by those skilled in the art that the first deionizing component 3 and the second deionizing component 4 do not necessary employ the same material and configuration. For example, the first deionizing component 3 can employ a copper-made metal braided mesh and the second deionizing component 4 can employ a steel-made foam metal. In addition, a plurality of deionizing components 3 and a plurality of second deionizing components 4 may be provided according to factors such as desired effects, selected materials, material thicknesses, and the like.

[0035] Referring to FIGS. 3 and 4, a support frame 5 is also provided. The first deionizing component 3 is fixedly installed on the support frame 5, for example, embedded within the support frame 5, so that the first deionizing component is received in the interior space of the housing 1 in a non-movable manner by means of the support frame 5.

[0036] According to not claimed embodiments, the support frame 5 may be fixedly connected to the housing 1 and / or the fixed contact terminal 7 located below the arc extinguishing chamber 2 by means of a fastening tool, for example a screw or a clamp. The support frame 5 may also be fixed directly to an arc extinguishing chamber side plate 21 of the arc extinguishing chamber 2 shown in FIG. 7.

[0037] According to the invention, the first limiting component 8 and the second limiting component 9 are provided, respectively, wherein the first limiting component 8 is fixedly installed on the fixed contact terminal 7, the second limiting component 9 is fixedly installed on the second sidewall 14 of the housing 1, and lower and upper borders of the support frame 5 are limited from relative movement relative to the housing 1 through shape fit with the first limiting component 8 and the second limiting component 9 respectively. As shown, for example, in FIG. 3, the first limiting component 8 limits the leftward movement of the lower border, the second limiting component 9 limits the rightward movement of the upper border, the support frame 5 is also dimensionally designed such that the upper end surface of the upper border and the lower end surface of the lower border abut against the second limiting component 9 and the first limiting component 8 respectively so as to be limited from moving up and down.

[0038] The second deionizing component 4 may also be connected to the housing 1 by means of other tools. However, due to the limitation of space, it is preferred that the second deionizing component 4 is clamped between a lower surface of the second sidewall 14 and an upper end surface of the base 11 facing the cover 12.

[0039] Since the deionizing components are arranged in the interior space of the housing, there is no need to increase the original occupation space. Less material is required, thus greatly reducing the manufacturing cost.

Examples

Embodiment Construction

[0018]A schematic solution of the structure disclosed by this disclosure is described in detail with reference to the accompanying drawings. Although providing the accompanying drawings is to present some implementations of the present utility model, the accompanying drawings do not need to be drawn according to the size of the specific implementation schemes, and certain features can be enlarged, removed, or locally exploded to better illustrate and explain the disclosure of the present utility model.

[0019]Some directional terms used in the following to describe the accompanying drawings should be construed as having normal meanings thereof and refer to those directions involved when the accompanying drawings are viewed normally. For example, "upper," "lower," "left," and "right" refer to top, bottom, left-hand and right-hand sides in view of FIGS. 1 and 2, respectively.

[0020]In addition, the ionized gas and the metal vapor, as well as other conductive gases that may be generated i...

Claims

1. A circuit breaker, comprising a housing (1) and an arc extinguishing chamber (2) arranged in an interior space of the housing (1), wherein a gas outlet passage is formed in a first sidewall (13) of the housing (1), the gas outlet passage is designed to communicate the interior space of the housing (1) with a surrounding environment of the circuit breaker, at least one deionizing component is arranged between the arc extinguishing chamber (2) and the gas outlet passage, and the deionizing component is configured to allow conductive gases to pass therethrough and designed to cool the conductive gases therethrough; wherein the at least one deionizing component includes a first deionizing component (3) and a second deionizing component (4); wherein the circuit breaker further includes a support frame (5) for fixedly installing the first deionizing component, wherein the first deionizing component (3) is received in the interior space of the housing in a relatively non-movable manner by means of the support frame (5); characterised in that the housing (1) comprises a base (11) and a cover (12) located above the base (11), and the gas outlet passage is formed on a vertically extending section of the cover (12); and in that the circuit breaker further comprises a fixed contact terminal (7) located below the arc extinguishing chamber (2) in the interior space of the housing (1), the cover (12) has a second sidewall (14) extending above the arc extinguishing chamber (2), and the support frame (5) is positioned relatively non-movably with respect to the housing by means of a first limiting component (8) fixedly installed on the fixed contact terminal (7) and a second limiting component (9) fixedly installed on the second sidewall (14).

2. The circuit breaker according to claim 1, wherein the deionizing component (3, 4) is made of one or both of a metal braided mesh or a foam metal.

3. The circuit breaker according to claim 2, wherein the metal woven mesh is made of a steel material, and the foam metal is made of a steel material, a ceramic material or a nickel-based alloy.

4. The circuit breaker according to claim 3, wherein when the foam metal is made of a steel material or a nickel-based alloy, an outer surface of the foam metal is also coated with a ceramic compound coating.

5. The circuit breaker according to any one of claims 1 to 4, wherein the first deionizing component (3) extends longitudinally across the entire arc extinguishing chamber (2).

6. The circuit breaker according to claim 5, wherein the second deionizing component (4) is arranged at a first end of the gas outlet passage close to the interior space of the housing (1).

7. The circuit breaker according to claim 6, wherein an insulation sheet (6) is further arranged at the first end of the gas outlet passage, at least one gas inlet hole is formed in the insulation sheet (6) and in gas communication with the gas outlet passage, wherein the insulation sheet (6) is arranged between the first end and the second deionizing component (4).

8. The circuit breaker according to claim 1, wherein the second deionizing component (4) is relatively non-movably clamped between a lower surface of the second sidewall (14) and an upper end surface of the base (11) facing the cover (12).

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