CN219329204U - Arc extinguishing chamber exhaust structure and switching device - Google Patents
Arc extinguishing chamber exhaust structure and switching device Download PDFInfo
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- CN219329204U CN219329204U CN202320148897.7U CN202320148897U CN219329204U CN 219329204 U CN219329204 U CN 219329204U CN 202320148897 U CN202320148897 U CN 202320148897U CN 219329204 U CN219329204 U CN 219329204U
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- 239000000758 substrate Substances 0.000 claims abstract description 19
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 238000004880 explosion Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 6
- 239000007789 gas Substances 0.000 description 24
- 230000009286 beneficial effect Effects 0.000 description 7
- 238000001816 cooling Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000002708 enhancing effect Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
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Abstract
The utility model relates to an arc extinguish chamber exhaust structure and a switching device, wherein the arc extinguish chamber exhaust structure comprises an arc extinguish grid assembly and a substrate, a window for accommodating the arc extinguish grid assembly is arranged on the substrate, an exhaust passage is arranged at the edge of the window positioned at the outlet side of the arc extinguish grid assembly, the exhaust passage comprises a first exhaust passage and a second exhaust passage, the first exhaust passage further comprises a first air inlet and a first extending air passage, the second exhaust passage further comprises a second air inlet and a second extending air passage, the first air inlet and the second air inlet are respectively and correspondingly arranged at the outlet sides of the lower half arc extinguish grid and the upper half arc extinguish grid of the arc extinguish grid assembly, the first extending air passage starts from the first air inlet and extends obliquely upwards, and the second extending air passage starts from the second air inlet and extends obliquely downwards. The arc extinguishing chamber has higher exhaust speed and more uniform exhaust effect, and the miniaturization of the external dimension of the circuit breaker and the longer length of the exhaust channel are considered.
Description
Technical Field
The utility model relates to the field of switching appliances, in particular to an improvement of an exhaust structure of an arc extinguishing chamber.
Background
In a switching device such as a circuit breaker, an arc extinguishing chamber is an important means for extinguishing an arc generated when a movable contact and a stationary contact are opened, and in general, when an arc is generated between the movable contact and the stationary contact, the arc is introduced into the arc extinguishing chamber by means of guiding an arc striking plate, pushing with an air blast, and the like, and an arc extinguishing gate is provided in the arc extinguishing chamber to perform arc extinguishing treatment on the arc. After arc extinction, the ionized gas and residual arc flushed from the exit side of the arc chute sheet need to be exhausted out of the circuit breaker through an exhaust passage. The design of the exhaust channel directly influences important safety parameters such as the discharge efficiency of ionized gas and electric arc in the arc extinguishing chamber, the temperature of the arc extinguishing chamber, the flashover distance of products and the like. In the prior art, the exhaust channels are mostly designed into a straight-through single exhaust channel, so that the external dimension of the circuit breaker is designed to be larger under the condition that the length of the exhaust channel is enough to meet the cooling requirement of gas; or the length of the exhaust passage is shortened due to the external dimension of the circuit breaker, but the defect that the cooling of the gas is not facilitated due to the short exhaust passage is caused. In addition, in the prior art, all gases in the space of the arc extinguishing chamber are difficult to uniformly exhaust through a single exhaust channel, so that the exhaust efficiency is affected, and the risk of arc re-combustion is improved.
Disclosure of Invention
Therefore, in order to solve the above problems, the present utility model provides an arc extinguishing chamber exhaust structure with optimized structure, and a switching device with the arc extinguishing chamber exhaust structure based on the arc extinguishing chamber exhaust structure.
The utility model is realized by adopting the following technical scheme:
the utility model provides an arc-extinguishing chamber exhaust structure, which comprises an arc-extinguishing grating sheet assembly and a substrate, wherein the arc-extinguishing grating sheet assembly is formed by relatively arranging a plurality of arc-extinguishing grating sheets at intervals, the relative arrangement direction of the arc-extinguishing grating sheets is defined to be the up-down direction, a window for loading the arc-extinguishing grating sheet assembly is arranged on the substrate, an exhaust channel is arranged at the edge of the window positioned at the outlet side of the arc-extinguishing grating sheet assembly, the exhaust channel comprises a first exhaust channel and a second exhaust channel, the first exhaust channel further comprises a first air inlet and a first extension air channel, the second exhaust channel further comprises a second air inlet and a second extension air channel, the first air inlet is correspondingly arranged at the outlet side of the lower half arc-extinguishing grating sheet of the arc-extinguishing grating sheet assembly, the first extension air channel is started from the first air inlet and extends obliquely upwards, and the second air inlet is correspondingly arranged at the outlet side of the upper half arc-extinguishing grating sheet of the arc-extinguishing grating sheet assembly, and the second extension air channel is started from the second air inlet and extends obliquely downwards.
Preferably, the substrate includes a first side plate surface and a second side plate surface that are different, the first air inlet and the first extending air passage are arranged on the first side plate surface, and the second air inlet and the second extending air passage are arranged on the second side plate surface.
Preferably, the window is formed by connecting a plurality of window walls end to end, and two diagonally arranged notches are arranged on one of the window walls corresponding to the outlet side of the arc extinguishing grid plate assembly and are respectively used as the first air inlet and the second air inlet.
Preferably, the first side plate surface is relatively positioned on the right side of the substrate, the second side plate surface is relatively positioned on the left side of the substrate, the right half arc-extinguishing gate sheet of the arc-extinguishing gate sheet assembly corresponds to the first air inlet, and the left half arc-extinguishing gate sheet of the arc-extinguishing gate sheet assembly corresponds to the second air inlet.
Preferably, the first extension air passage and/or the second extension air passage are/is a zigzag-shaped passage or an arc-shaped passage.
Preferably, the first extending air passage and the second extending air passage are two-section fold-line-shaped passages, the first extending air passage extends obliquely upwards and then vertically upwards, and the second extending air passage extends obliquely downwards and then vertically downwards.
Preferably, the first exhaust passage and/or the second exhaust passage are/is provided with at least two parallel passages.
Preferably, a guide plate inclined to the inner wall of the channel is arranged on the inner wall of the channel of the first extension air channel and/or the second extension air channel; the deflector is gradually far away from the inner wall of the channel from the upstream to the downstream direction of the first extension air channel or the second extension air channel.
The embodiment also provides a switching device, which comprises a movable contact and a stationary contact for controlling the circuit to be switched on or off, and further comprises an arc extinguishing chamber for extinguishing an arc generated when the movable contact and the stationary contact are switched off, wherein the arc extinguishing chamber comprises the arc extinguishing chamber exhaust structure.
Preferably, the switching device is a circuit breaker.
Preferably, the circuit breaker is a bipolar circuit breaker, and comprises an L-pole conductive system, an N-pole conductive system, a base and a first side cover, wherein the base and the first side cover are oppositely jointed to form an inner space for installing the L-pole conductive system and the N-pole conductive system, the base is arranged between the base and the first side cover to separate the L-pole conductive system and the N-pole conductive system, the L-pole conductive system comprises the arc extinguishing chamber, and the N-pole conductive system is provided with a third exhaust channel.
Preferably, the opposite joint direction of the base and the first side cover is defined as a left-right direction, wherein the first side cover is oppositely arranged on the left side of the base, and the base is oppositely arranged on the right side of the first side cover; the first extending air channel is communicated with the left end face of the first side cover in a left extending mode, the second extending air channel is communicated with the left end face of the second side cover in a left extending mode, and the second extending air channel is communicated with the left end face of the first side cover in a left extending mode.
Preferably, the third exhaust passage also exits from the left end face of the first side cover.
Preferably, the external angle at the joint of the first extending air channel and the first air outlet channel is a cambered surface chamfer or an inclined surface chamfer, and the external angle at the joint of the second extending air channel and the second air outlet channel is a cambered surface chamfer or an inclined surface chamfer.
Preferably, the channel walls of the exhaust channel are formed on the base plate, the base and the first side cover respectively, and the exhaust channel is formed by jointing the base plate and the base and the first side cover at two sides of the base plate.
The utility model has the following beneficial effects: according to the utility model, the first air inlet is correspondingly arranged at the lower half part of the arc-extinguishing grid plate assembly, and the second air inlet is correspondingly arranged at the upper half part of the arc-extinguishing grid plate assembly, so that the lower half arc-extinguishing grid plate and the upper half arc-extinguishing grid plate of the arc-extinguishing grid plate assembly can be respectively exhausted, and therefore, the exhaust speed of the arc-extinguishing chamber is higher, and the exhaust effect is more uniform. The first extending air passage extends obliquely upwards, the second extending air passage extends obliquely downwards, the obliquely extending air passage is beneficial to lengthening the length of the exhaust passage and enhancing the gas cooling effect, the first extending air passage and the second extending air passage are in crossed arrangement, the internal space of the circuit breaker is compactly utilized, and compared with a conventional exhaust passage structure extending in the length direction of the circuit breaker, the utility model can occupy the length space of the circuit breaker as little as possible, and the miniaturization of the external dimension of the circuit breaker and the longer length of the exhaust passage are considered.
Drawings
FIG. 1 is a schematic perspective view of an embodiment interrupt router;
FIG. 2 is a structural exploded view of an embodiment interrupt router;
FIG. 3 is a top view of an embodiment interrupt router;
FIG. 4 is a cross-sectional view at A-A in FIG. 3 to show the first air inlet and first extended air passage on the right side of the base plate;
FIG. 5 is a left side view of the embodiment interrupt router with the first side cover removed to show the second air inlet and the second extended air channel on the left side of the substrate;
FIG. 6 is a left side view of an embodiment interrupt router;
FIG. 7 is a cross-sectional view at B-B in FIG. 6;
FIG. 8 is a schematic perspective view (angle one) of a substrate in an embodiment;
fig. 9 is a schematic perspective view of a substrate (angle two) in the embodiment.
Detailed Description
For further illustration of the various embodiments, the utility model is provided with the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments and together with the description, serve to explain the principles of the embodiments. With reference to these matters, one of ordinary skill in the art will understand other possible embodiments and advantages of the present utility model. The components in the figures are not drawn to scale and like reference numerals are generally used to designate like components.
The utility model will now be further described with reference to the drawings and detailed description.
Referring to fig. 1 and 2, as a preferred embodiment of the present utility model, there is provided a circuit breaker, which is a bipolar circuit breaker, comprising a case, an L-pole conductive system 10 and an N-pole conductive system 20, wherein the case further comprises a base 2, and first and second side covers 1 and 3 coupled to both sides of the base 2, respectively, the first and second side covers 1 and 2 being relatively coupled to form an inner space for mounting the L-pole conductive system 10 and the N-pole conductive system 20, and the second side cover 3 and the base 2 being relatively coupled to form an inner space for mounting a control unit 30, the control unit 30 including an electromagnetic trip device and a trip mechanism in this embodiment. A substrate 4 is fixedly installed between the first side cover 1 and the base 2, and the L-pole conductive system 10 and the N-pole conductive system 20 are separated by the substrate 4. The L-pole conductive system 10 includes an arc extinguishing chamber 6 (refer to fig. 5), where the arc extinguishing chamber 6 includes an arc extinguishing grid assembly 5, and the arc extinguishing grid assembly 5 is formed by relatively arranging a plurality of arc extinguishing grids at intervals. For convenience of description, the definition in this embodiment is as follows:
the opposite arrangement direction of the arc extinguishing bars is taken as the up-down direction, namely the height direction of the breaker, namely the Y1-Y2 direction in the figure 2 is taken as the up-down direction, wherein the Y1 direction is upward, and the Y2 direction is downward;
the opposite joint direction of the base 2 and the first side cover 1 is taken as a left-right direction, namely, the width direction of the circuit breaker, wherein the first side cover 1 is oppositely positioned at the left side of the base 2, the base 2 is oppositely positioned at the right side of the first side cover 1, namely, the X1 direction is left in fig. 2, and the X2 direction is right.
Referring to fig. 2, 4 to 9, the substrate 4 is provided with a window 41 for accommodating the arc extinguishing bar assembly 5, an exhaust passage for exhausting arc and ionized gas is provided at the edge of the window 41 at the gas outlet side of the arc extinguishing bar assembly 5 (i.e., the downstream side of the arc extinguishing bar assembly 5 on the gas traveling path in the arc extinguishing chamber), the exhaust passage includes a first exhaust passage 71 and a second exhaust passage 72, the first exhaust passage 71 further includes a first gas inlet 710 and a first extension gas passage 711, the second exhaust passage 72 further includes a second gas inlet 720 and a second extension gas passage 721, the first gas inlet 710 is correspondingly provided at the outlet side of the lower half arc extinguishing bar of the arc extinguishing bar assembly 5, the first extension gas passage 711 is started from the first gas inlet 710 and extends obliquely upward, the second gas inlet 720 is correspondingly provided at the outlet side of the upper half arc extinguishing bar of the arc extinguishing bar assembly 5, and the second extension gas passage 721 is started from the second gas inlet 720 and extends obliquely downward. In this embodiment, the first air inlet 710 is correspondingly disposed at the lower half position of the arc-extinguishing gate assembly 5, and the second air inlet 720 is correspondingly disposed at the upper half position of the arc-extinguishing gate assembly 5, so that the lower half arc-extinguishing gate and the upper half arc-extinguishing gate of the arc-extinguishing gate assembly 5 can be exhausted respectively, and thus, the exhaust speed of the arc-extinguishing chamber is faster, and the exhaust effect is more uniform. The first extending air flue 711 extends obliquely upwards, the second extending air flue 721 extends obliquely downwards, the extending air flue is beneficial to lengthening the length of the exhaust channel and enhancing the gas cooling effect, the first extending air flue 711 and the second extending air flue 721 are in a cross layout, the internal space of the circuit breaker is compactly utilized, compared with a conventional exhaust channel structure extending in the length direction of the circuit breaker (the direction perpendicular to the up-down direction and the left-right direction at the same time is the length direction of the circuit breaker), the length space of the circuit breaker can be occupied as little as possible, and the miniaturization of the overall dimension of the circuit breaker and the longer length of the exhaust channel are considered.
The substrate 4 includes a first side plate 401 and a second side plate 402, the first side plate 401 is located on the right side of the substrate 4, the second side plate 402 is located on the left side of the substrate 4, the first air inlet 710 and the first extending air channel 711 are disposed on the first side plate 401, and the second air inlet 720 and the second extending air channel 721 are disposed on the second side plate 402. The window 41 is formed by connecting a plurality of window walls end to end, and two diagonally arranged notches are arranged on one window wall 411 corresponding to the outlet side of the arc extinguishing grid assembly 5 and serve as a first air inlet 710 and a second air inlet 720 respectively. In this way, the two exhaust channels are arranged by using the window thickness space of the substrate 4 with the window 41 in the left-right direction, and the installation space in the left-right direction is not additionally occupied, which is beneficial to miniaturization of the circuit breaker. Moreover, the first air inlet 710 and the second air inlet 720 are right to left and correspond to the right half arc extinguishing gate sheet and the left half arc extinguishing gate sheet of the arc extinguishing gate sheet assembly 5 respectively, so that the exhaust is further more uniform.
In the present embodiment, the first extension air channel 711 and the second extension air channel 721 are two-stage zigzag channels, the first extension air channel 711 extends obliquely upward and then extends vertically upward, and the second extension air channel 721 extends obliquely downward and then extends vertically downward. Of course, in other embodiments, the first extension air channel 711 or the second extension air channel 721 may be a three-section, four-section, or arc-shaped channel, as long as the overall extension trend is inclined upward or downward, and the embodiment sets the first extension air channel 711 and the second extension air channel 721 as two-section, folding-shaped channels for facilitating the manufacture thereof, and also ensures that the first extension air channel 711 and the second extension air channel 721 have longer extension lengths.
In this embodiment, the first extension air channel 711 and the second extension air channel 721 are both provided with two channels in parallel. In other embodiments, the first and/or second extension passages 711, 721 may be one-way only, or have three, four, etc. ways in parallel. The more the first and second extending air passages 711 and 721 are provided, the more the air passage walls are, which is more beneficial to the cooling of the gas, but the more difficult the manufacturing is, and the two first and second extending air passages 711 and 721 are selected in this embodiment to achieve both the cooling effect and the manufacturing difficulty.
In the present embodiment, a baffle (e.g., baffle 723, see fig. 5) inclined to the inner wall of the passage is provided on the inner wall of the passage of the first and second extension air passages 711 and 721; the baffle is gradually far away from the inner wall of the channel from the upstream to downstream direction of the first extension air channel 711 or the second extension air channel 721, and the baffle is arranged to be beneficial to preventing the gas from flowing back.
Referring to fig. 1 and 7, a first air outlet channel 712 is further connected downstream of the first extending air channel 711, where the first air outlet channel 712 extends leftwards to outlet air from the left end surface of the first side cover 1, and the corresponding air outlet is a first air outlet 11 disposed on the left end surface of the first side cover 1. A second air outlet channel 722 is further communicated downstream of the second extending air channel 721, and the second air outlet channel extends leftwards to outlet air from the left end face of the first side cover 1, and the corresponding air outlet is a second air outlet 12 arranged on the left end face of the first side cover 1. For the N-pole conductive system 20, a third exhaust passage 8 (see fig. 4) is provided, and the third exhaust passage 8 finally exits from the left end face of the first side cover 1 to the left, and the corresponding exit gas is a third air outlet 13 provided at the left end face of the first side cover 1. Therefore, in this embodiment, the L-pole conductive system 10 and the N-pole conductive system 20 are both left-facing, i.e. air is discharged from the width direction of the circuit breaker, so that the exhaust channel is prevented from occupying the space of the length direction of the circuit breaker, and the miniaturized design of the circuit breaker in the length direction is facilitated.
In this embodiment, the external angle at the connection position of the first extending air flue 711 and the first air outlet channel 712 is a cambered surface chamfer 9 (or may be an inclined chamfer), and the external angle at the connection position of the second extending air flue 721 and the second air outlet channel 722 is also the same chamfer structure, so as to guide the gas bending trend through the chamfer structure, and improve the exhaust speed. Of course, the same chamfer structure may be adopted for the passage turning portion of the third exhaust passage 8.
As shown in fig. 2 and 7, in this embodiment, the channel walls of the exhaust channel are formed on the base plate 4, the base 2 and the first side cover 1, and the exhaust channel is formed by joining the base plate 4, the base 2 on the left and right sides thereof and the first side cover 1, so that the arrangement is beneficial to reducing the manufacturing difficulty and facilitating the assembly of the product.
The arc extinguishing chamber and the arc extinguishing chamber exhaust structure adopted in the embodiment can be applied to other switching devices, such as a disconnecting switch, besides being applied to a circuit breaker.
While the utility model has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the utility model as defined by the appended claims.
Claims (12)
1. The utility model provides an explosion chamber exhaust structure, includes arc extinguishing bars piece subassembly and base plate, arc extinguishing bars piece subassembly comprises the relative interval arrangement of several arc extinguishing bars piece, defines the relative arrangement direction of arc extinguishing bars piece is upper and lower direction, its characterized in that: the base plate is provided with a window for loading the arc extinguishing grid plate component, the edge of the window positioned at the outlet side of the arc extinguishing grid plate component is provided with an exhaust channel, the exhaust channel comprises a first exhaust channel and a second exhaust channel, the first exhaust channel further comprises a first air inlet and a first extension air channel, the second exhaust channel further comprises a second air inlet and a second extension air channel, wherein,
the first air inlet is correspondingly arranged at the outlet side of the arc extinguishing grating sheet at the lower half part of the arc extinguishing grating sheet assembly, the first extending air passage starts from the first air inlet and extends obliquely upwards,
the second air inlet is correspondingly arranged at the outlet side of the arc extinguishing grating sheet at the upper half part of the arc extinguishing grating sheet assembly, and the second extending air passage starts from the second air inlet and extends obliquely downwards.
2. The arc chute exhaust structure according to claim 1, wherein: the base plate comprises a first side plate surface and a second side plate surface which are different, the first air inlet and the first extending air passage are formed in the first side plate surface, and the second air inlet and the second extending air passage are formed in the second side plate surface.
3. The arc chute exhaust structure according to claim 2, wherein: the window is formed by connecting a plurality of window walls end to end, and two notches which are diagonally arranged are arranged on one window wall corresponding to the outlet side of the arc extinguishing grid plate assembly and are respectively used as the first air inlet and the second air inlet.
4. The arc chute exhaust structure according to claim 2, wherein: the first side plate surface is relatively positioned on the right side of the substrate, the second side plate surface is relatively positioned on the left side of the substrate, the right half arc-extinguishing gate sheet of the arc-extinguishing gate sheet assembly corresponds to the first air inlet, and the left half arc-extinguishing gate sheet of the arc-extinguishing gate sheet assembly corresponds to the second air inlet.
5. The arc chute exhaust structure according to claim 1, wherein: the first extension air passage and/or the second extension air passage are a zigzag passage or an arc passage.
6. The arc chute exhaust structure according to claim 5, wherein: the first extending air passage and the second extending air passage are two-section fold-line-shaped passages, the first extending air passage extends obliquely upwards and then vertically upwards, and the second extending air passage extends obliquely downwards and then vertically downwards.
7. The arc chute exhaust structure according to claim 1, wherein: the first exhaust passage and/or the second exhaust passage are/is provided with at least two parallel passages.
8. The arc chute exhaust structure according to claim 1, wherein: a guide plate inclined to the inner wall of the channel is arranged on the inner wall of the channel of the first extension air channel and/or the second extension air channel; the deflector is gradually far away from the inner wall of the channel from the upstream to the downstream direction of the first extension air channel or the second extension air channel.
9. The switching electric appliance comprises a movable contact and a fixed contact which are used for controlling a circuit to be switched on or off, and further comprises an arc extinguishing chamber which is used for extinguishing an arc generated when the movable contact and the fixed contact are switched off, and is characterized in that: the arc extinguishing chamber comprises the arc extinguishing chamber exhaust structure of any one of claims 1-8.
10. The switching device according to claim 9, wherein: the switching apparatus is a bipolar breaker, and includes an L-pole conductive system, an N-pole conductive system, a base, and a first side cover, the base and the first side cover being relatively engaged to form an internal space in which the L-pole conductive system and the N-pole conductive system are installed, the base is disposed between the base and the first side cover to separate the L-pole conductive system and the N-pole conductive system, the L-pole conductive system includes the arc extinguishing chamber, and the N-pole conductive system is provided with a third exhaust passage.
11. The switching device according to claim 10, wherein: defining the relative joint direction of the base and the first side cover as a left-right direction, wherein the first side cover is oppositely arranged on the left side of the base, and the base is oppositely arranged on the right side of the first side cover; the first extending air channel is communicated with the left end face of the first side cover in a left extending mode, the second extending air channel is communicated with the left end face of the second side cover in a left extending mode, and the second extending air channel is communicated with the left end face of the first side cover in a left extending mode.
12. The switching device according to claim 11, wherein: the third exhaust passage also vents from the left end face of the first side cover; and/or
The external angle at the joint of the first extension air channel and the first air outlet channel is an arc surface chamfer or an inclined surface chamfer, and the external angle at the joint of the second extension air channel and the second air outlet channel is an arc surface chamfer or an inclined surface chamfer; and/or
The channel cavity walls of the exhaust channel are respectively formed on the base plate, the base seat and the first side cover, and the exhaust channel is formed by the combination of the base plate and the base seat and the first side cover on two sides of the base plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320148897.7U CN219329204U (en) | 2023-01-18 | 2023-01-18 | Arc extinguishing chamber exhaust structure and switching device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320148897.7U CN219329204U (en) | 2023-01-18 | 2023-01-18 | Arc extinguishing chamber exhaust structure and switching device |
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| Publication Number | Publication Date |
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| CN219329204U true CN219329204U (en) | 2023-07-11 |
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| CN202320148897.7U Active CN219329204U (en) | 2023-01-18 | 2023-01-18 | Arc extinguishing chamber exhaust structure and switching device |
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| Country | Link |
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| CN (1) | CN219329204U (en) |
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2023
- 2023-01-18 CN CN202320148897.7U patent/CN219329204U/en active Active
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Effective date of registration: 20240204 Address after: No.560-564 Donglin Road, Jimei North Industrial Zone, Jimei District, Xiamen City, Fujian Province Patentee after: XIAMEN HONGFA AUTOMOTIVE ELECTRONICS Co.,Ltd. Country or region after: China Address before: No.566 Donglin Road, Jimei North Industrial Zone, Xiamen City, Fujian Province Patentee before: XIAMEN HONGFA ELECTRICAL SAFETY & CONTROLS Co.,Ltd. Country or region before: China |