Deionization device and circuit breaker

Abstract

A deionization device comprises a module shell, at least one metal net plate and at least one insulating flash barrier, the module shell and the at least one insulating flash barrier are fixedly installed, so that at least one containing cavity is formed in the module shell, the at least one metal net plate is arranged in the containing cavity, and the at least one metal net plate is arranged in the containing cavity. The insulating flash barrier and the metal mesh plate are provided with a plurality of air holes, the side wall, far away from the insulating flash barrier, of the module shell is provided with at least one air inlet boss in a protruding mode, the face, far away from the containing cavity, of the air inlet boss is provided with an air inlet, the air inlet is communicated with the containing cavity, and the air inlet is communicated with the containing cavity. The sectional area of the air inlet boss is smaller than that of the containing cavity. The deionization device provided by the utility model is more favorable for increasing the pressure in the circuit breaker, so that the arc voltage is rapidly increased, and the arc is rapidly extinguished to achieve a current limiting effect.

Description

Technical Field

[0001] The utility model relates to the field of low-voltage electrical appliances, in particular to an anti-ionization device and a circuit breaker. Background Art

[0002] During the circuit breaker's tripping process, an arc is generated between the moving and stationary contacts. Because arcs are conductive, if they are not extinguished promptly, they can cause a phase-to-phase short circuit in the circuit breaker, directly impacting the breaker's breaking capacity and service life, and even endangering personal safety. Extinguishing arcs is typically accomplished by installing an external ionization device.

[0003] However, the arc extinguishing effect of the quenching device in the prior art is poor, and the high-temperature gas inside the quenching device is easily affected by the external air pressure and flows back into the circuit breaker, causing the arc to reignite. Utility Model Content

[0004] The purpose of the utility model is to overcome the defects of the prior art and provide an arc extinguishing device with better arc extinguishing effect.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] In the first aspect, the present application provides an anti-ionization device, comprising a module shell, at least one metal mesh plate and at least one insulating arc isolation plate, the module shell and the at least one insulating arc isolation plate are fixedly installed to form at least one accommodating cavity inside the module shell, at least one metal mesh plate is placed in the accommodating cavity, the insulating arc isolation plate and the metal mesh plate are provided with a plurality of air holes, the side wall protrusion of the module shell away from the insulating arc isolation plate is provided with at least one air inlet boss, the air inlet boss is provided with an air inlet on a side away from the accommodating cavity, the air inlet is communicated with the accommodating cavity, and the cross-sectional area of ​​the air inlet boss is smaller than the cross-sectional area of ​​the accommodating cavity.

[0007] In one possible implementation, the connection between the air inlet boss and the accommodating cavity has a transition channel with a trumpet structure. The transition channel is located inside the module shell and connects the air inlet boss and the accommodating cavity. The transition channel gradually becomes larger from the air inlet to the accommodating cavity.

[0008] In a possible implementation, the area of ​​the largest portion of the air inlet is less than or equal to 50% of the cross-sectional area of ​​the accommodating cavity.

[0009] In a possible implementation, the air inlet is in a trumpet structure, gradually becoming larger from away from the accommodating cavity to closer to the accommodating cavity.

[0010] In one possible implementation, the deionization device is a monopole deionization device, which includes a module housing and an insulating arc isolation plate installed on the module housing, and the module housing includes an accommodating cavity and an air inlet boss.

[0011] In one possible implementation, the deionization device is a multi-pole deionization device, which includes a module shell and at least one insulating arc isolation plate installed on the module shell, and the module shell includes a plurality of the accommodating cavities and a plurality of the air inlet bosses corresponding to the plurality of the accommodating cavities.

[0012] In a possible implementation, a step surface is formed at the connection between the transition channel and the accommodating cavity, and the metal mesh plate is limitedly matched with the step surface.

[0013] In one possible implementation, the metal mesh plate is a flat plate structure.

[0014] In one possible implementation, the metal mesh plate is provided with a first limiting structure, and the module shell is provided with a second limiting structure that cooperates with the first limiting structure; the first limiting structure is a protruding "U"-shaped hook, and the second limiting structure is a first groove that cooperates with the "U"-shaped hook.

[0015] In one possible implementation, the metal mesh plate is a curved structure, and the metal mesh plate includes one or more curved surface structures.

[0016] In one possible implementation, the metal mesh plate may be an "S"-shaped structure or a "C"-shaped structure.

[0017] In the second aspect, the present application provides a circuit breaker including the above-mentioned deionization device, the circuit breaker including a housing and at least one phase pole arranged in the circuit breaker, the phase poles each including a contact system and an arc extinguishing chamber, at least one phase pole cavity is provided in the housing for accommodating the phase pole, an arc extinguishing channel is provided in the phase pole cavity, the arc extinguishing chamber is installed in the phase pole cavity and connected to the arc extinguishing channel, and the air inlet of the deionization device is located at one end of the arc extinguishing channel, facing the arc extinguishing chamber.

[0018] In one possible implementation, the deionization device is installed outside the housing and is detachably fixedly connected to the housing.

[0019] In one possible implementation, the shell includes a first mounting structure, and a second mounting structure is provided on the outside of the air inlet boss of the de-ionization device, which is installed in coordination with the first mounting structure. The air inlet boss extends into the shell, and the module shell is fixedly installed on the shell through the coordination of the first mounting structure and the second mounting structure.

[0020] Compared with the prior art, the ion elimination device provided in the present application includes a module housing, at least one metal mesh plate, and at least one insulating arc isolation plate. The module housing and the at least one insulating arc isolation plate are fixedly mounted to form a housing cavity for accommodating the at least one metal mesh plate. The insulating arc isolation plate and the metal mesh plate are provided with a plurality of air holes. The metal mesh plate in the housing cavity can effectively absorb high-temperature metal ions generated by the opening of the cooling contact system. At least one air inlet boss is provided on a side wall protrusion of the module housing away from the insulating arc isolation plate. An air outlet is provided on a side of the module housing away from the air inlet, so that the air inlet and the housing cavity are connected. The cross-sectional area of ​​the air inlet boss is smaller than the cross-sectional area of ​​the housing cavity, and the area of ​​the air inlet is smaller than the area of ​​the air outlet. The smaller aperture of the air inlet is more conducive to increasing the pressure inside the circuit breaker, causing the arc voltage to increase rapidly, thereby quickly extinguishing the arc and achieving the effect of current limiting. At the same time, the smaller aperture of the air inlet can also prevent the high-temperature gas in the housing cavity from being affected by the external air pressure and flowing back into the circuit breaker, causing the arc to reignite.

[0021] Furthermore, by providing a transition channel with a trumpet structure at the connection between the air inlet boss inside the module shell and the accommodating cavity, the transition channel with the trumpet structure is beneficial for the arc inside the circuit breaker to enter the accommodating cavity, so that the airflow has a larger divergence space, ensuring a larger contact area between the arc and the metal mesh plate, and quickly extinguishing the arc so that it cannot fly out to the outside, thereby achieving the purpose of zero arcing.

[0022] Furthermore, the air inlet is in a trumpet structure, gradually becoming larger from away from the accommodating cavity to closer to the accommodating cavity, which is more conducive to a larger divergence space for the air flow entering the accommodating cavity from the air inlet, ensuring a larger contact area between the arc and the metal mesh plate, and extinguishing the arc more quickly.

[0023] Furthermore, the area of ​​the largest part of the air inlet is less than or equal to 50% of the cross-sectional area of ​​the accommodating cavity, which is more conducive to increasing the pressure inside the circuit breaker and rapidly increasing the arc voltage.

[0024] Furthermore, the anti-ionization device can be a single-pole anti-ionization device with one body and one pole, or a multi-pole anti-ionization device with multiple poles, which can improve the flexibility of assembling the anti-ionization device on the circuit breaker and improve the assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the structure of the utility model after the internal structure of the deionization device is disassembled;

[0026] Figure 2 This is a schematic structural diagram of the front side of the utility model's freeing device;

[0027] Figure 3It is a structural diagram of the back of the utility model's freeing device;

[0028] Figure 4 、 Figure 5 and Figure 6 This is a schematic structural diagram of the metal mesh plate flat structure of the utility model's deionization device;

[0029] Figure 7 and Figure 8 This is a schematic structural diagram of the bent structure of the metal mesh plate of the utility model's deionization device;

[0030] Figure 9 This is a schematic diagram of the structure of the utility model's free-floating device after the curved metal mesh plate is disassembled;

[0031] Figure 10 This is a structural diagram of the front side of the module housing of the bipolar deionization device of the utility model;

[0032] Figure 11 This is a structural diagram of the back of the housing of the bipolar deionization device module of the utility model;

[0033] Figure 12 and Figure 13 This is a schematic structural diagram of the back of the two module shells of the utility model's deionization device;

[0034] Figure 14 This is a schematic diagram of the structure of the circuit breaker housing, arc extinguishing channel base and ion elimination device after disassembly;

[0035] The numbers in the accompanying drawings include: arc extinguishing channel 103; module housing 1; metal mesh plate 2; insulating arc isolation plate 3; accommodating cavity 11; air vent 31; air inlet boss 12; air inlet 121; air outlet 13; transition channel 14; step surface 23; first limiting structure 21; second limiting structure 22; recessed structure 15; first mounting hole 32; second mounting hole 33; circuit breaker base 101; arc extinguishing channel base 102; first mounting structure 16; second mounting structure 17; third mounting structure 18. DETAILED DESCRIPTION

[0036] The following embodiments are given in conjunction with the accompanying drawings to further illustrate the specific implementation of the present invention. The protection scope of the present invention is not limited to the description of the following embodiments.

[0037] A circuit breaker includes a housing and at least one phase pole disposed within the housing. Each phase pole includes a contact system and an arc extinguishing chamber. The housing includes at least one phase pole cavity for accommodating the phase pole. The contact system and arc extinguishing chamber are mounted within the phase pole cavity. The contact system includes a moving contact and a stationary contact. An operating mechanism is connected to the moving contact and is used to drive the contact system to close or open, thereby opening and closing the circuit breaker. An arc is generated at the moment the contact system opens and closes. The arc extinguishing chamber is configured to correspond to the contact system and is used to extinguish the arc generated by the contact system. When a circuit breaker includes multiple phase poles, an insulating partition is provided within the housing to separate the housing into multiple phase pole cavities for accommodating the multiple phase poles. The insulating partition is used to isolate the phase voltage to prevent phase-to-phase short circuits caused by accidents.

[0038] The circuit breaker also features a quenching device, mounted externally and removably attached to the housing. This device absorbs arcing generated by the arc. It also absorbs high-temperature metal particles generated by the contact system, effectively cooling and eliminating the quenching. An arc extinguishing channel 103 is provided within the phase cavity of the housing. The arc extinguishing chamber is mounted within the phase cavity and communicates with the arc extinguishing channel 103. The quenching device is located at one end of the arc extinguishing channel 103, facing the arc extinguishing chamber.

[0039] like Figure 1 、 Figure 2 and Figure 3 As shown, the present application provides an elimination device, comprising a module shell 1, at least one metal mesh plate 2 and at least one insulating arc isolation plate 3, the module shell 1 and the at least one insulating arc isolation plate 3 are fixedly installed so that at least one accommodating cavity 11 is formed inside the module shell 1, and at least one metal mesh plate 2 is placed in the accommodating cavity 11, and the insulating arc isolation plate 3 and the metal mesh plate 2 are provided with a plurality of air holes 31, and the side wall protrusion of the module shell 1 away from the insulating arc isolation plate 3 is provided with at least one air inlet boss 12, and the side of the air inlet boss 12 away from the accommodating cavity 11 is provided with an air inlet 121, and the side of the module shell 1 away from the air inlet 121 is an air outlet 13, the insulating arc isolation plate 3 is arranged at the air outlet 13, the air inlet 121 is connected with the accommodating cavity 11, and the cross-sectional area of ​​the air inlet boss 12 is smaller than the cross-sectional area of ​​the accommodating cavity 11.

[0040] Furthermore, if the cross-sectional area of ​​the air inlet boss 12 is smaller than the cross-sectional area of ​​the accommodating cavity 11, the area of ​​the air inlet 121 must also be smaller than the area of ​​the air outlet 13. The high-temperature gas inside the circuit breaker enters from the air inlet 121, passes through the metal mesh plate 2, and is discharged from the air vents 31 on the insulating arc isolation plate 3 at the air outlet 13.

[0041] The deionization device provided in the present application includes a module housing 1, at least one metal mesh plate 2 and at least one insulating arc isolation plate 3. The module housing 1 and the at least one insulating arc isolation plate 3 are fixedly installed so that a accommodating cavity 11 for accommodating at least one metal mesh plate 2 is formed inside the module housing 1. The insulating arc isolation plate 3 and the metal mesh plate 2 are provided with multiple air holes 31. The metal mesh plate 2 in the accommodating cavity 11 can effectively absorb the high-temperature metal ions generated by the opening of the cooling contact system. At least one air inlet boss 12 is provided on the side wall protrusion of the module housing 1 away from the insulating arc isolation plate 3. The air inlet 121 is connected to the accommodating cavity 11. The cross-sectional area of ​​the air inlet boss 12 is smaller than the cross-sectional area of ​​the accommodating cavity 11. The smaller aperture of the air inlet 121 is more conducive to increasing the pressure inside the circuit breaker, so that the arc voltage increases rapidly, thereby quickly extinguishing the arc to achieve the effect of current limiting. At the same time, the small aperture of the air inlet 121 can also prevent the high-temperature gas in the accommodating cavity 11 from being affected by the external air pressure and flowing back into the circuit breaker, causing the arc to reignite.

[0042] Preferably, Figure 1 As shown, the connection between the air inlet boss 12 and the accommodating cavity 11 within the module housing 1 is provided with a trumpet-shaped transition channel 14. This transition channel 14 is located within the module housing 1 and connects the air inlet boss 12 and the accommodating cavity 11. The transition channel 14 gradually widens from the air inlet 121 to the accommodating cavity 11. This transition channel 14 facilitates the expansion of the airflow after the arc inside the circuit breaker enters the accommodating cavity 11, ensuring a larger contact area between the arc and the metal mesh plate 2, quickly extinguishing the arc and preventing it from escaping to the outside, thereby achieving zero arcing.

[0043] Preferably, the area of ​​the air inlet 121 at its maximum point is less than or equal to 50% of the cross-sectional area of ​​the accommodating cavity 11 , which is more conducive to increasing the pressure inside the circuit breaker and rapidly increasing the arc voltage. Of course, this is only a preferred embodiment and does not strictly limit the size of the cross-sectional area of ​​the air inlet boss 12 .

[0044] In one embodiment of the air inlet 121, the cross-sectional area of ​​the air inlet 121 remains constant from the direction away from the accommodating chamber 11 to the direction closer to the accommodating chamber 11, i.e., the size remains the same. In another embodiment, the air inlet 121 also has a trumpet-shaped structure, gradually increasing in size from the direction away from the accommodating chamber 11 to the direction closer to the accommodating chamber 11. The trumpet-shaped structure of the air inlet 121 further facilitates the airflow entering the accommodating chamber 11 from the air inlet 121 to have a larger divergence space, ensuring a larger contact area between the arc and the metal mesh plate 2, and extinguishing the arc more quickly.

[0045] Preferably, the cross-sectional structure of the air inlet boss 12 remains unchanged from the direction away from the accommodating cavity 11 to the direction close to the accommodating cavity 11, which is more conducive to the installation of the air inlet boss 12 in the circuit breaker.

[0046] Preferably, Figure 1 、 Figure 2 、 Figure 3 and Figure 9 As shown, the deionization device can be a single-pole deionization device with one body and one pole, corresponding to a phase pole of a circuit breaker, and installed at one end of one pole of the circuit breaker. The single-pole deionization device includes a module housing 1 and an insulating arc isolation plate 3 installed at the air outlet 13 of the module housing 1. The module housing 1 includes an accommodating cavity 11 and an air inlet boss 12.

[0047] Further, such as Figure 10 and Figure 11 As shown, in another possible implementation, the deionization device can be an integrated multi-pole deionization device, which corresponds one-to-one to multiple poles of the circuit breaker. In this case, the multi-pole deionization device includes a module housing 1 and at least one insulating arc isolation plate 3 installed at the air outlet 13 of the module housing 1. The module housing 1 includes multiple accommodating cavities 11 and multiple air inlet bosses 12 corresponding to the multiple accommodating cavities 11. Each accommodating cavity 11 and air inlet boss 12 corresponds to one pole of the circuit breaker. Figure 10 and Figure 11 Shown is a schematic structural diagram of a bipolar deionization device module housing 1 .

[0048] Among them, in the multi-pole deionization device, it can include multiple insulating arc isolation plates 3, and multiple insulating arc isolation plates 3 are installed one-to-one with multiple accommodating cavities 11, or it can include one insulating arc isolation plate 3, and one insulating arc isolation plate 3 is installed corresponding to the module shell 1 to block multiple accommodating cavities 11.

[0049] Each of the accommodating chambers 11 in the above-mentioned monopolar deionization device and multipolar deionization device includes at least one metal mesh plate 2.

[0050] In one embodiment, the anti-ionization device includes two accommodating cavities 11 and two air inlet bosses 12. When installed in a four-pole circuit breaker, two multi-pole anti-ionization devices are installed at each end of the circuit breaker.

[0051] in, Figure 14 The schematic diagram of the structure of the single-pole deionization device of the present application installed in the double-pole circuit breaker is shown as follows: Figure 14 As shown, the single-pole anti-ionization device is installed at both ends of the double-pole circuit breaker, with two single-pole anti-ionization devices installed at each end.

[0052] The anti-ionization device provided in the present application can be either a single-pole anti-ionization device with one integrated pole or a multi-pole anti-ionization device with multiple integrated poles, which can improve the flexibility of assembling the anti-ionization device on the circuit breaker and improve the assembly efficiency.

[0053] Preferably, Figure 2 As shown, the module housing 1 and the air inlet boss 12 are both square structures. The square structure can adapt to the internal structure of the circuit breaker, allowing the ion elimination device and the circuit breaker to be seamlessly connected, enhancing the sealing between the ion elimination device and the circuit breaker, preventing leakage of high-temperature ion elimination gas, and reducing the risk of breakdown between the external busbars of the circuit breaker.

[0054] Furthermore, in other embodiments, the air inlet boss 12 is circular or elliptical, or has other similar structures, and the module shell 1 can also be designed into other shapes as needed, such as circular or elliptical, etc. As long as it is a boss structure, and the air inlet 121 on the boss and the accommodating cavity 11 are through structures, and the cross-sectional area of ​​the air inlet boss 12 is smaller than the cross-sectional area of ​​the accommodating cavity 11, it falls within the scope of protection of this application.

[0055] Preferably, Figure 9 As shown, a step surface 23 is formed at the connection between the transition channel 14 and the accommodating cavity 11. The metal mesh plate 2 is limitedly matched with the step surface 23 and installed inside the accommodating cavity 11 so that the maximum area of ​​the metal mesh plate 2 contacts the arc.

[0056] Preferably, Figure 4 、 Figure 5 and Figure 6 As shown, the metal mesh plate 2 is a flat plate structure.

[0057] Further, such as Figure 1 、 Figure 5 and Figure 6 As shown, the metal mesh plate 2 has a first limiting structure 21 at both ends along the height direction of the circuit breaker, and the module housing 1 is provided with a second limiting structure 22 that cooperates with the first limiting structure 21; in a feasible manner, the first limiting structure 21 is a protruding "U"-shaped hook, and the second limiting structure 22 is a first groove that cooperates with the "U"-shaped hook, and the protruding "U"-shaped hook can be placed inside the first groove and limited by the first groove.

[0058] Furthermore, the first limiting structure 21 can also be a boss protruding from the air inlet 121 to the air outlet 13, or the first limiting structure 21 is a groove structure, and the second limiting structure 22 is the boss that cooperates with the groove structure. On the one hand, the purpose of setting the first limiting structure 21 on the metal mesh plate 2 and setting the second limiting structure 22 on the module shell 1 is to increase the stability of the installation of the metal mesh plate 2 and the module shell 1, to avoid the metal mesh plate 2 shaking inside the module shell 1 and affecting the arc extinguishing effect. On the other hand, the first limiting structure 21 can be used in the case where multiple metal mesh plates 2 are stacked. The first limiting structure 21 can create an arc extinguishing gap between the metal mesh plates 2 and the metal mesh plates 2. The arc extinguishing gap will produce an effect similar to the arc extinguishing of the longitudinal seam, which is more conducive to the cooling and extinguishing of the arc.

[0059] Of course, in other feasible embodiments, the metal mesh plate 2 may not be provided with the first limiting structure 21, and the module housing 1 may be provided with grooves or bosses that partially or completely fit around the metal mesh plate 2, and the metal mesh plate 2 cooperates with the grooves or bosses on the module housing 1 and is installed inside the module housing 1. In this embodiment of the metal mesh plate 2 (such as Figure 4 As shown), when multiple metal mesh plates 2 need to be stacked, a corresponding limiting structure is also required on the module shell 1 so that there is an arc-extinguishing gap between the multiple flat metal mesh plates 2. The limiting structure can be but is not limited to a limiting groove or a limiting boss.

[0060] Preferably, the metal mesh plate 2 is a curved structure, and the metal mesh plate 2 includes one or more curved structures. Setting the metal mesh plate 2 into a curved structure can increase the surface area of ​​the metal mesh plate 2, thereby increasing the number of arc extinguishing holes and improving the arc extinguishing effect.

[0061] Further, such as Figure 7 and Figure 8 As shown, the metal mesh plate 2 can be an "S"-shaped structure or a "C"-shaped structure. Of course, the metal mesh plate 2 can also include more than two curved surface structures, which will not be repeated here.

[0062] in, Figure 1 It shows a schematic structural diagram of two flat metal mesh plates 2 installed in the accommodating cavity 11. Figure 9 The figure shows a schematic diagram of a metal mesh plate 2 in a "C" shape installed in the accommodating cavity 11. Figure 1 and Figure 9 As shown, according to the structure and quantity of the metal mesh plates 2 , the internal structure of the module housing 1 can also be adjusted differently to adapt to the structure and quantity of the metal mesh plates 2 .

[0063] It should be noted that the number of metal mesh plates 2 can be selected based on the arcing distance requirement. For example, when the arcing distance is 50 mm, 1-2 metal mesh plates 2 can be placed in at least one accommodating cavity 11 of the extinguishing device. When the arcing distance requirement is too high, for example, when the arcing distance needs to be 0 mm, 2-3 metal mesh plates 2 can be placed in at least one accommodating cavity 11 of the extinguishing device. "Arcing distance" refers to the distance the arc travels through the air between the moving and static contacts and is a unit of measure for arc length. During the arc extinguishing process of a circuit breaker, a portion of the arc or ionized gas will be ejected from the arc nozzle of the circuit breaker, forming an arcing. The length of the arcing is not only related to the design and manufacture of the circuit breaker itself, but also to external factors, such as load characteristics, ambient temperature, and humidity. The longer the arcing distance, the better the arc can be extinguished, thereby reducing potential dangers and damage.

[0064] When a circuit is disconnected, an arc is generated between the moving and stationary contacts. Because air is an insulator, the arc must travel a certain distance to continue burning. The arcing distance is directly related to the extent of the arc. If the arcing distance is too small, the arc may not be extinguished, resulting in the circuit not being disconnected.

[0065] Preferably, Figure 4-Figure 9 As shown, the air holes 31 of the metal mesh plate 2 and the insulating arc isolation plate 3 can be, but are not limited to, circular, elliptical, rectangular, square, diamond and other shapes.

[0066] like Figure 1 and Figure 9 As shown, in this embodiment, the insulating arc isolation plate 3 includes a plurality of air holes 31 in a parallel strip-shaped structure.

[0067] It should be noted that when the accommodating cavity 11 of the module housing 1 includes a plurality of metal mesh plates 2 , the plurality of metal mesh plates 2 may be one or a combination of the above-mentioned flat plate structure and curved structure.

[0068] Preferably, Figure 11 、 Figure 12 and Figure 13 As shown, a recessed structure 15 is provided at the air outlet 13 of the module housing 1 , and the insulating arc isolation plate 3 can be placed inside the recessed structure 15 and seamlessly fit with the module housing 1 .

[0069] Preferably, the insulating arc isolation plate 3 includes a first mounting portion, and the module housing 1 is provided with a second mounting portion that cooperates with the first mounting portion. The insulating arc isolation plate 3 is fixedly mounted on the module housing 1 through the cooperation of the first mounting portion and the second mounting portion.

[0070] Furthermore, the first mounting portion is a snap-fit ​​structure, and the second mounting portion is a slot structure. The snap-fit ​​structure and the slot structure cooperate to achieve snap-fit ​​installation of the insulating arc isolation plate 3 and the module housing 1 .

[0071] Further, such as Figure 1 As shown, in the embodiment of the present application, the four corners of the insulating arc isolation plate 3 are provided with first mounting holes 32, and the module housing 1 is provided with second mounting holes 33 or second mounting grooves at positions corresponding to the first mounting holes 32. The insulating arc isolation plate 3 is installed on the module housing 1, and the module housing 1 also includes four screws, which are respectively inserted into the first mounting holes 32 at the four corners of the insulating arc isolation plate 3 and the second mounting holes 33 or second mounting grooves corresponding to the first mounting holes 32, and the four screws are tightened and fixed.

[0072] In the embodiment of this application, Figure 14 As shown, the casing includes a circuit breaker base 101 and an arc extinguishing channel base 102. The circuit breaker base 101 and the arc extinguishing channel base 102 are fixedly installed along the height direction of the circuit breaker. The arc extinguishing channel base 102 includes at least one arc extinguishing channel 103. The arc extinguishing chamber is installed inside the circuit breaker and is connected to the arc extinguishing channel 103 in the arc extinguishing channel base 102. The air inlet 121 of the ion elimination device is located at one end of the arc extinguishing channel 103, facing the arc extinguishing chamber.

[0073] Further, such as Figure 14 As shown, the arc extinguishing channel base 102 includes a first mounting structure 16, and the air inlet boss 12 of the extinguishing device is provided with a second mounting structure 17 on the outside thereof for being installed in cooperation with the first mounting structure 16. The air inlet boss 12 extends into the arc extinguishing channel base 102, and the module housing 1 is fixedly installed on the arc extinguishing channel base 102 through the cooperation between the first mounting structure 16 and the second mounting structure 17.

[0074] Furthermore, the bottom of the circuit breaker base 101 is also provided with the first mounting structure 16 , which can seal and fix the top of the air inlet boss 12 of the deionization device.

[0075] Furthermore, the first mounting structure 16 is at least one mounting groove provided along the height direction of the circuit breaker, and the second mounting structure 17 is at least one mounting boss that cooperates with the mounting groove. The mounting boss of the deionization device is inserted into the mounting groove from top to bottom along the height direction of the circuit breaker, thereby fixing the deionization device to the arc extinguishing channel base 102. In other possible implementations, the first mounting structure 16 may be a mounting boss, and the second mounting structure 17 may be a mounting groove.

[0076] Further, such as Figure 14As shown, in the embodiment of the present application, two strip-shaped bosses are protruding on the outer side of the air inlet boss 12, and three strip-shaped bosses are protruding on the tail end of the arc extinguishing channel base 102. Two strip-shaped grooves are formed between the three strip-shaped bosses, which are installed corresponding to the two strip-shaped bosses of the air inlet boss 12. Two groups of strip-shaped bosses and strip-shaped grooves are arranged for coordinated installation, which has better sealing and more secure installation.

[0077] Furthermore, at least one third mounting structure 18 is provided on the circuit breaker base 101, and a second insulating partition can be provided outside the circuit breaker base 101. The second insulating partition is isolated between adjacent deionization devices. The second insulating partition includes a fourth mounting structure that cooperates with the third mounting structure 18. The third mounting structure 18 can be a mounting rib groove, and the fourth mounting structure is a mounting rib. Through the cooperation between the mounting rib groove and the mounting rib, the second insulating partition is installed on the circuit breaker base 101 along the height direction of the circuit breaker.

[0078] Furthermore, in another embodiment, a terminal shield may be provided at the wiring terminal of the circuit breaker base 101 to replace the second insulating partition. The terminal shield includes a panel and at least one third insulating partition. The panel and the third insulating partition are arranged vertically and integrally formed. The panel is used to shield the wiring terminals on the operating surface to improve the safety protection effect. The third mounting structure 18 is a groove corresponding one-to-one to the third insulating partition. The terminal shield is installed at the wiring terminal of the circuit breaker base 101, and the third insulating partition thereon is inserted into the groove to isolate the wiring terminals.

[0079] It should be noted that in the description of this utility model, the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, or are conventionally placed directions or positional relationships during use. They are intended solely for ease of description and do not imply that the devices or components referred to must have a specific direction. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used solely for distinction and description and should not be construed as indicating relative importance.

[0080] The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For those skilled in the art of the present invention, without departing from the concept of the present invention, several simple deductions or substitutions can be made, which should be considered to fall within the scope of protection of the present invention.

Claims

1. A device for eliminating ionization, comprising a module housing (1), at least one metal mesh plate (2) and at least one insulating arc isolation plate (3), wherein the module housing (1) and the at least one insulating arc isolation plate (3) are fixedly installed so that at least one accommodating cavity (11) is formed inside the module housing (1), and at least one metal mesh plate (2) is placed in the accommodating cavity (11), and a plurality of air holes (31) are provided on the insulating arc isolation plate (3) and the metal mesh plate (2), characterized in that: The module housing (1) is provided with at least one air inlet boss (12) on a side wall protruding away from the insulating arc isolation plate (3); an air inlet port (121) is provided on a side of the air inlet boss (12) away from the accommodating cavity (11); the air inlet port (121) is communicated with the accommodating cavity (11); and the cross-sectional area of ​​the air inlet boss (12) is smaller than the cross-sectional area of ​​the accommodating cavity (11).

2. The deionization device according to claim 1, characterized in that: A transition channel (14) with a trumpet structure is provided at the connection between the air inlet boss (12) and the accommodating chamber (11). The transition channel (14) is located inside the module housing (1) and connects the air inlet boss (12) and the accommodating chamber (11). The transition channel (14) gradually becomes larger from the air inlet (121) to the accommodating chamber (11).

3. The deionization device according to claim 1, characterized in that: The area of ​​the largest portion of the air inlet (121) is less than or equal to 50% of the cross-sectional area of ​​the accommodating cavity (11).

4. The deionization device according to claim 1, characterized in that: The air inlet (121) is in a trumpet structure, and gradually becomes larger from a direction away from the accommodating chamber (11) to a direction close to the accommodating chamber (11).

5. The deionization device according to claim 1, characterized in that: The deionization device is a single-pole deionization device, comprising a module housing (1) and an insulating arc isolation plate (3) mounted on the module housing (1); the module housing (1) comprises a housing cavity (11) and an air inlet boss (12).

6. The deionization device according to claim 1, characterized in that: The deionization device is a multi-pole deionization device, comprising a module housing (1) and at least one insulating arc isolation plate (3) mounted on the module housing (1); the module housing (1) comprises a plurality of accommodating cavities (11) and a plurality of air inlet bosses (12) corresponding to the plurality of accommodating cavities (11).

7. The deionization device according to claim 2, characterized in that: A step surface (23) is formed at the connection between the transition channel (14) and the accommodating cavity (11), and the metal mesh plate (2) is positionally matched with the step surface (23).

8. The deionization device according to claim 1, characterized in that: The metal mesh plate (2) is a flat plate structure.

9. The deionization device according to claim 8, characterized in that: The metal mesh plate (2) is provided with a first limiting structure (21), and the module housing (1) is provided with a second limiting structure (22) that cooperates with the first limiting structure (21); the first limiting structure (21) is a protruding "U"-shaped barb, and the second limiting structure (22) is a first groove that cooperates with the "U"-shaped barb.

10. The deionization device according to claim 1, characterized in that: The metal mesh plate (2) is a curved structure, and the metal mesh plate (2) includes one or more curved surface structures.

11. The deionization device according to claim 10, characterized in that: The metal mesh plate (2) is an "S"-shaped structure or a "C"-shaped structure.

12. A circuit breaker, characterized in that: The invention comprises the deionization device according to any one of claims 1 to 11, wherein the circuit breaker comprises a housing and at least one phase pole arranged in the circuit breaker, wherein the phase poles each comprise a contact system and an arc extinguishing chamber, and at least one phase pole cavity is arranged in the housing for accommodating the phase pole, an arc extinguishing channel (103) is arranged in the phase pole cavity, and the arc extinguishing chamber is installed in the phase pole cavity and communicated with the arc extinguishing channel (103), and the air inlet (121) of the deionization device is located at one end of the arc extinguishing channel (103) and faces the arc extinguishing chamber.

13. The circuit breaker according to claim 12, wherein: The deionization device is installed outside the shell and is detachably fixedly connected to the shell.

14. The circuit breaker according to claim 13, wherein: The housing includes a first mounting structure (16); a second mounting structure (17) is provided on the outside of the air inlet boss (12) of the deionization device and is mounted in cooperation with the first mounting structure (16); the air inlet boss (12) extends into the housing; and the module housing (1) is fixedly mounted on the housing through the cooperation between the first mounting structure (16) and the second mounting structure (17).

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