Switch and power converter

Abstract

The utility model discloses a switch and a power converter, and the switch comprises a housing which is provided with an arc spraying port; and the first dustproof assembly comprises a first dustproof cover, the first dustproof cover is arranged on the shell, the first dustproof cover seals the arc spraying opening, and part of the first dustproof cover can be separated from the shell and open the arc spraying opening under the condition that the switch sprays the arc. In the switch, the first dustproof assembly reduces foreign matters such as sand and dust entering the switch, so that the reliability of the switch is improved; the first dustproof assembly also prevents the arc discharge function of the switch from being affected.

Description

Switches and power converters Technical Field

[0001] This application relates to the field of switch protection technology, and more specifically, to a switch and a power converter. Background Technology

[0002] In power converters, foreign objects such as sand and dust can enter the switch. These foreign objects can easily cause the switch to fail and affect its reliability.

[0003] Therefore, how to reduce the entry of foreign objects such as sand and dust into the switch in order to improve the reliability of the switch is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0004] In view of this, the purpose of this application is to provide a switch and power converter that reduces the entry of foreign objects such as sand and dust into the switch, thereby improving the reliability of the switch.

[0005] To achieve the above objectives, this application provides the following technical solution:

[0006] A switch, comprising:

[0007] A housing, wherein the housing is provided with an arc nozzle;

[0008] A first dustproof component, comprising a first dustproof cover disposed on the housing, the first dustproof cover sealing the arc nozzle, and a portion of the first dustproof cover being able to detach from the housing and open the arc nozzle when the arc is switched on or off.

[0009] Optionally, a portion of the first dust cover can deform and detach from the housing when the arc is switched on and off to open the arc nozzle.

[0010] Optionally, the first dust cover includes: a first part of the dust cover, a second part of the dust cover, and a deformable structure;

[0011] The dust cover is first connected to the housing, the dust cover second part is connected to or in contact with the housing, the deformable structure connects the dust cover second part and the dust cover first part, the deformable structure can deform when the arc spraying is switched on and off, and the dust cover second part can detach from the housing and open the arc spraying port when the arc spraying is switched on and off.

[0012] Optionally, the deformable structure includes at least one of a groove and a flexible element.

[0013] Optionally, when the deformable structure includes a groove, the groove includes a gradient groove, the width of which gradually decreases from the opening of the groove to the bottom of the groove, and the width direction of the groove is the distribution direction of the first part of the dust cover and the second part of the dust cover.

[0014] Optionally, the first part of the dust cover is fixedly connected to the housing, and the end of the second part of the dust cover away from the first part of the dust cover is snapped into the housing.

[0015] Optionally, the second part of the dust cover is provided with a first buckle, which is located inside the spray nozzle and is engaged with the housing plate where the spray nozzle is located.

[0016] Optionally, the first dust cover is a flexible sheet.

[0017] Optionally, the first dustproof component further includes a dustproof frame, which is connected to the housing. The through hole of the dustproof frame communicates with the jet nozzle, and the first dustproof cover is connected to the dustproof frame and closes the through hole.

[0018] Optionally, the first end of the first dust cover is rotatably connected to the housing, and the second end of the first dust cover is in contact with or detachably connected to the housing.

[0019] Optionally, the first dustproof assembly further includes a first sealing element disposed on the first dustproof cover, the first dustproof cover being sealed to the housing via the first sealing element.

[0020] Optionally, the switch further includes:

[0021] The operating handle is disposed inside the housing, the housing is provided with a clearance hole, and the operating handle protrudes from the housing through the clearance hole;

[0022] The second dustproof component includes a second dustproof cover disposed on the housing, and the second dustproof cover is capable of closing and opening the clearance hole.

[0023] Optionally, the second dust cover is disposed in the clearance hole, the second dust cover and the clearance hole are sealed together, and the second dust cover has a clearance groove for accommodating the operating handle.

[0024] Optionally, the second dust cover and the clearance hole are sealed together by an interference fit or a transition fit;

[0025] And / or, the second dust cover is provided with a second buckle, which engages with the housing plate where the clearance hole is located.

[0026] Optionally, the second dust cover is provided with a dust cover handle.

[0027] Optionally, the second dust cover covers the housing plate where the clearance hole is located.

[0028] Optionally, the second dust cover has a first end and a second end opposite to each other, the first end of the second dust cover is rotatably connected to the housing, and the second end of the second dust cover is in contact with or detachably connected to the housing.

[0029] Optionally, the second dust cover includes a dust cover panel and a dust cover side panel, wherein the dust cover side panel is annular, the dust cover side panel is connected to the periphery of the dust cover panel, a portion of the dust cover side panel is the first end of the second dust cover, and a portion of the dust cover side panel is the second end of the second dust cover.

[0030] Optionally, the housing is provided with a first magnetic suction member, and the second dustproof assembly further includes a second magnetic suction member that is magnetically connected to the first magnetic suction member, and the second dustproof cover is disposed on the second magnetic suction member.

[0031] Optionally, the second dustproof assembly further includes a second seal disposed on the second dustproof cover, the second dustproof cover being sealed to the housing via the second seal.

[0032] Optionally, the housing includes a housing body and a cover plate, the cover plate and the housing body are sealed together, and the jet nozzle is disposed on the housing body.

[0033] Based on the above-described switch, this application also provides a power converter, which includes: a housing, and the switch described in any of the above-described embodiments; wherein the switch is located inside the housing.

[0034] In the switch provided in this application, the first dust cover of the first dustproof assembly is connected to the housing. The first dust cover closes the arc-spraying nozzle, which reduces the entry of foreign objects such as sand and dust into the housing through the arc-spraying nozzle, thereby reducing the entry of foreign objects such as sand and dust into the switch and improving the reliability of the switch. Moreover, part of the first dust cover can detach from the housing and open the arc-spraying nozzle when the switch is arcing, ensuring that the arc is vented through the arc-spraying nozzle when the switch is arcing, and avoiding affecting the arc-venting function of the switch. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0036] Figure 1 is a partial structural schematic diagram of the power converter provided in Embodiment 1 of this application;

[0037] Figure 2 is a schematic diagram of the switch provided in Embodiment 1 of this application;

[0038] Figure 3 is a schematic diagram of the switch provided in Embodiment 1 of this application under arcing conditions;

[0039] Figure 4 is a schematic diagram of a structure of the first dustproof component in the switch provided in Embodiment 1 of this application;

[0040] Figure 5 is an enlarged structural diagram of part A in Figure 4;

[0041] Figure 6 is another structural schematic diagram of the first dustproof component in the switch provided in Embodiment 1 of this application;

[0042] Figure 7 is another structural schematic diagram of the first dustproof component in the switch provided in Embodiment 1 of this application;

[0043] Figure 8 is a cross-sectional view of the switch provided in Embodiment 1 of this application;

[0044] Figure 9 is an enlarged structural diagram of part B in Figure 8;

[0045] Figure 10 is an enlarged structural diagram of part C in Figure 8;

[0046] Figure 11 is a schematic diagram of the switch provided in Embodiment 1 of this application with the operating handle exposed;

[0047] Figure 12 is a schematic diagram of the switch provided in Embodiment 2 of this application;

[0048] Figure 13 is a schematic diagram of the switch provided in Embodiment 2 of this application under arcing conditions;

[0049] Figure 14 is a schematic diagram of the structure of the first dustproof component in the switch provided in Embodiment 2 of this application;

[0050] Figure 15 is a schematic diagram of the switch provided in Embodiment 3 of this application;

[0051] Figure 16 is a schematic diagram of the switch provided in Embodiment 3 of this application with the operating handle exposed;

[0052] Figure 17 is a schematic diagram of the structure of the second dustproof component in the switch provided in Embodiment 3 of this application;

[0053] Figure 18 is a schematic diagram of the switch provided in Embodiment 4 of this application;

[0054] Figure 19 is an enlarged schematic diagram of the cross-sectional view of the switch provided in Embodiment 4 of this application;

[0055] Figure 20 is a schematic diagram of the structure of the second dustproof component in the switch provided in Embodiment 4 of this application.

[0056] Explanation of reference numerals in the attached figures:

[0057] 1-Switch, 2-Casing;

[0058] 11-Shell, 110-Shell plate, 111-Shell body, 1111-Spray nozzle, 1112-Top plate, 1113-First side plate, 1114-Second side plate, 1115-Bottom plate, 112-Cover plate, 1121-Lean hole, 1122-Slot, 1123-Cover plate panel, 1124-Cover plate top plate, 1125-Cover plate side plate, 1126-Cover plate bottom plate, 113-Third seal;

[0059] 12-Operating handle;

[0060] 13-First dustproof component, 131-First dustproof cover, 1311-First part of dustproof cover, 1312-Second part of dustproof cover, 13121-End, 1313-Deformable structure, 13131-Groove, 01-Equal width groove, 02-Gradual groove, 03-Groove bottom, 04-Groove opening, 13132-Flexible part, 132-First sealing element, 133-First buckle, 134-Dustproof frame, 1341-Through hole;

[0061] 14-Second dustproof assembly, 141-Second dustproof cover, 1411-Third buckle, 1412-Dustproof panel, 1413-Dustproof side panel, 1414-Dustproof cover body, 14141-Giveaway groove, 1415-Dustproof cover handle, 1416-Second buckle, 142-Second seal, 143-Hinge, 144-Second magnetic attachment;

[0062] 15 - First magnetic chuck;

[0063] 001 - First end, 002 - Second end. Detailed Implementation

[0064] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0065] The terminology used in the following embodiments is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. As used in the specification and appended claims of this application, the singular expressions “a,” “an,” “the,” “the,” “the,” and “this” are intended to also include expressions such as “one or more,” unless the context clearly indicates otherwise. It should also be understood that in the embodiments of this application, “one or more” means one, two, or more; “and / or” describes the relationship between related objects, indicating that three relationships may exist; for example, A and / or B can represent: A alone, A and B simultaneously, or B alone, where A and B can be singular or plural. The character “ / ” generally indicates that the preceding and following related objects are in an “or” relationship.

[0066] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0067] The "multiple" mentioned in the embodiments of this application refers to two or more. It should be noted that in the description of the embodiments of this application, terms such as "first" and "second" are used only for the purpose of distinguishing descriptions and should not be construed as indicating or implying relative importance, nor should they be construed as indicating or implying order.

[0068] This application provides a switch and a power converter that reduces the entry of foreign objects such as sand and dust into the switch, thereby improving the switch's reliability.

[0069] The following four examples illustrate the switching and power converter in detail.

[0070] Example 1 of this application

[0071] As shown in Figure 1, in Embodiment 1 of this application, the power converter includes a housing 2 and a switch 1, with the switch 1 located inside the housing 2.

[0072] To facilitate the installation of switch 1, a support member is provided inside the housing 2, and switch 1 is mounted on the support member. Of course, switch 1 can be installed inside the housing 2 in other ways, and this embodiment of the application does not limit this.

[0073] The switch 1 includes a housing 11 and a first dustproof component 13.

[0074] The housing 11 contains corresponding components, such as moving contacts and stationary contacts, to ensure the function of switch 1.

[0075] The housing 11 includes a housing body 111 and a cover plate 112, which are sealed to the housing body 111, for example, by a third seal 113. This reduces the entry of foreign objects such as sand and dust into the housing 11.

[0076] To ensure the stability of the housing 11, the cover plate 112 is fixed to the housing body 111 by screws, or the cover plate 112 is fixed to the housing body 111 by other means.

[0077] The specific structure of the housing body 111 and the cover plate 112 is selected according to the actual situation. For example, as shown in Figures 2 and 8, the housing body 111 includes: a top plate 1112, a bottom plate 1115, two first side plates 1113 and a second side plate 1114. The top plate 1112 and the bottom plate 1115 are distributed along a first direction, the two first side plates 1113 are distributed along a second direction, and the second side plate 1114 is perpendicular to a third direction. The first direction, the second direction and the third direction are perpendicular to each other. The first direction can be understood as the vertical direction. The first side plates 1113 and the second side plate 1114 are both connected between the top plate 1112 and the bottom plate 1115. The two first side plates 1113 are both connected to the second side plate 1114. The two first side plates 1113, the top plate 1112 and the bottom plate 1115 form an opening, and the cover plate 112 closes the opening.

[0078] The cover plate 112 and the housing body 111 are distributed along a third direction. The cover plate 112 includes: a cover plate front panel 1123, a cover plate top plate 1124, a cover plate bottom plate 1126, and two cover plate side plates 1125. The cover plate front panel 1123 is perpendicular to the third direction. The cover plate top plate 1124 and the cover plate bottom plate 1126 are distributed along a first direction, and the two cover plate side plates 1125 are distributed along a second direction. The cover plate front panel 1123 and the two cover plate side plates 1125 are both connected between the cover plate top plate 1124 and the cover plate bottom plate 1126, and the two cover plate side plates 1125 are both connected to the cover plate front panel 1123. In the first direction, the cover plate front panel 1123 is located on the side of the cover plate 112 away from the housing body 111, and in the third direction, the openings of the cover plate front panel 1123 and the housing body 111 are opposite each other.

[0079] Of course, the shell body 111 and the cover plate 112 can also be other structures, and this application embodiment one does not limit them.

[0080] The housing 11 is provided with an arc discharge port. As shown in Figure 8, the arc discharge port 1111 is provided on the housing body 111. In order to facilitate the arc discharge of the switch 1, the arc discharge port 1111 is located on the top of the housing body 111, for example, the arc discharge port 1111 is provided on the top plate 1112.

[0081] The spray nozzle 1111 connects to the cavity inside the housing 11 where the moving and stationary contacts are located. Foreign objects such as sand and dust can enter the housing 11 through the spray nozzle 1111. The sand and dust deposited on the contacts can easily cause poor contact between the moving and stationary contacts of the switch, leading to switch failure.

[0082] As shown in Figures 2 and 3, the first dustproof component 13 is disposed on the housing 11, specifically, the first dustproof component 13 is disposed on the housing body 111. The first dustproof component 13 seals the spray nozzle 1111 to reduce the entry of foreign objects such as sand and dust into the housing 11, thereby improving the reliability of the switch.

[0083] Specifically, the first dustproof component 13 includes a first dustproof cover 131, which is disposed on the housing 11. The first dustproof cover 131 closes the spray nozzle 1111, and a portion of the first dustproof cover 131 can detach from the housing 11 and open the spray nozzle 1111 when the spray nozzle is switched on or off.

[0084] For example, a first dust cover 131 is disposed on the housing body 111, and a portion of the first dust cover 131 can detach from the housing body 111 and open the arc nozzle 1111 when the arc is switched on and off.

[0085] The first dustproof component 13 reduces the entry of foreign objects such as sand and dust into the housing 11 through the arc discharge port 1111, thereby reducing the entry of foreign objects such as sand and dust into the switch and improving the reliability of the switch. The first dustproof component 13 also ensures that the arc is vented through the arc discharge port 1111 in the event of arc discharge by the switch, avoiding affecting the arc venting function of the switch 1. Therefore, the first dustproof cover 131 can both seal the arc discharge port 1111 and allow the arc discharge port 1111 to be opened.

[0086] In the first embodiment of this application, the first dust cover 131 closes the spray nozzle 1111, so that the protection level of the switch can reach IP6X.

[0087] In switch 1, there can be one or more spray nozzles 1111. To improve the dustproof effect, the first dustproof component 13 can correspond one-to-one with the spray nozzles 1111. Of course, the first dustproof component 13 can also correspond to at least two spray nozzles 1111.

[0088] In the first embodiment of this application, the following is achieved: a portion of the first dust cover 131 can detach from the housing 11 and open the arc nozzle 1111 when the arc is switched on and off; a portion of the first dust cover 131 can deform and detach from the housing 11 when the arc is switched on and off, so as to open the arc nozzle 1111.

[0089] As shown in Figure 4, the first dust cover 131 includes: a first part 1311 of the dust cover, a second part 1312 of the dust cover, and a deformable structure 1313.

[0090] As shown in Figures 2-4, the first part 1311 of the dust cover is connected to the housing 11, the second part 1312 of the dust cover is connected to or in contact with the housing 11, and the deformable structure 1313 connects the second part 1312 of the dust cover and the first part 1311 of the dust cover. The deformable structure 1313 can deform when the arc spraying is switched on and off, and the second part 1312 of the dust cover can detach from the housing 11 and open the arc spraying port 1111 when the arc spraying is switched on and off.

[0091] For example, the first part 1311 of the dust cover is connected to the housing body 111, and the second part 1312 of the dust cover is connected to or in contact with the housing body 111. The second part 1312 of the dust cover can detach from the housing body 111 and open the arc nozzle 1111 when the arc is switched on and off.

[0092] In the above structure, when the switch is in the case of arcing, the arcing impact force acts on the deformable structure 1313, causing the deformable structure 1313 to deform. Based on the deformation of the deformable structure 1313, the second part 1312 of the dust cover moves relative to the first part 1311 of the dust cover, causing the second part 1312 of the dust cover to detach from the housing 11 and open the arcing port 1111, thereby not affecting the normal arc extinguishing function of the switch 1.

[0093] The aforementioned first dust cover 131 can be rectangular, square, or other polygonal. In this case, to facilitate arc venting, the first part 1311 of the dust cover can be arranged along one side of the first dust cover 131, making the entire first dust cover 131 a cantilever structure. For example, as shown in FIG4, the first dust cover 131 is rectangular, with two long sides and two narrow sides. The first part 1311 of the dust cover is arranged along the narrow side of the first dust cover 131, and the first part 1311 and the second part 1312 of the dust cover are distributed along the long side. Of course, the first dust cover 131 can also be other structures or other shapes, such as circles, etc., which is not limited in this embodiment of the present application.

[0094] To facilitate arc extinguishing, in the third direction, the distance between the first part 1311 of the dust cover and the cover plate 112 is less than the distance between the second part 1312 of the dust cover and the cover plate 112. Thus, the first part 1311 of the dust cover is closer to the cover plate 112 than the second part 1312. Of course, the distance between the first part 1311 of the dust cover and the cover plate 112 can also be greater than the distance between the second part 1312 of the dust cover and the cover plate 112, or the distance between the first part 1311 of the dust cover and the cover plate 112 can also be equal to the distance between the second part 1312 of the dust cover and the cover plate 112.

[0095] To facilitate arc extinguishing, the projection of the first part 1311 of the dust cover along the axial direction of the jet nozzle 1111 is relatively independent from the projection of the jet nozzle 1111 along its axial direction. This prevents the first part 1311 of the dust cover from obstructing the jet nozzle 1111, thus facilitating arc extinguishing. Of course, the first part 1311 of the dust cover can also obstruct the jet nozzle 1111.

[0096] To facilitate the processing of the first dust cover 131, as shown in Figure 4, the deformable structure 1313 includes a groove 13131, which is disposed on the side of the first dust cover 131 facing the spray nozzle 1111.

[0097] As shown in Figure 5, the groove 13131 has a bottom 03 and an opening 04, which are distributed along the depth direction of the groove 13131. It can be understood that the depth direction of the groove 13131 is the same as the thickness direction of the first dust cover 131. The width direction of the groove 13131 is the distribution direction of the first part 1311 and the second part 1312 of the dust cover.

[0098] The groove 13131 includes a constant-width groove 01 and a gradient groove 02. The constant-width groove 01 is closer to the groove opening 04 than the gradient groove 02, and the gradient groove 02 is closer to the groove bottom 03 than the constant-width groove 01. The width of the constant-width groove 01 is equal at any position, and the width of the gradient groove 02 gradually decreases from the groove opening 04 to the groove bottom 03.

[0099] The cross-section of the groove 13131 can be triangular, trapezoidal or other shapes, and the cross-section of the groove 13131 is parallel to the depth direction of the groove 13131.

[0100] In practice, the groove 13131 may include the gradient groove 02 but not the equal width groove 01, as long as the groove 13131 includes the gradient groove 02.

[0101] To improve the dustproof effect of the first dust cover 131, as shown in Figures 8 and 9, the first part 1311 of the dust cover is fixedly connected to the housing 11, and the end 13121 of the second part 1312 of the dust cover away from the first part 1311 is snapped into the housing 11.

[0102] For example, the first part 1311 of the dust cover is fixedly connected to the housing body 111, and the end 13121 of the second part 1312 of the dust cover away from the first part 1311 is engaged with the housing body 111.

[0103] As shown in Figures 4 and 9, to simplify the snap-fit ​​structure, the second part 1312 of the dust cover can be provided with a first snap-fit ​​133. The first snap-fit ​​133 is located inside the spray nozzle 1111, and the first snap-fit ​​133 is snapped into the housing plate 110 where the spray nozzle 1111 is located. In this way, the first snap-fit ​​133 is snapped into the housing 11 itself, simplifying the structure of the housing 11; moreover, there is no need to modify the structure of the housing 11, which facilitates the promotion and application of the first dustproof component 13.

[0104] It should be noted that the top plate 1112, bottom plate 1115, first side plate 1113, second side plate 1114, cover plate panel 1123, cover plate top plate 1124, cover plate bottom plate 1126, and cover plate side plate 1125 mentioned above are all shell plates 110. When the spray nozzle 1111 is set on the top plate 1112, the shell plate 110 where the spray nozzle 1111 is located is the top plate 1112, and the first buckle 133 is engaged with the top plate 1112.

[0105] In practice, the dust cover second part 1312 and the housing 11 can be provided with a buckle, and the other can be provided with a slot that cooperates with the buckle, and are not limited to the above structure.

[0106] In Embodiment 1 of this application, as shown in FIG6, the deformable structure 1313 can also be a flexible member 13132, which can be bent and deformed in the event of arcing during switching. FIG6(a) shows the state of the first dust cover 131 when there is no arcing during switching; FIG6(b) shows the state of the first dust cover 131 when there is arcing during switching.

[0107] It should be noted that bending deformation includes zigzag deformation and flexural deformation.

[0108] In practice, the deformable structure 1313 may also include a flexible element 13132 and the groove 13131 mentioned above. The flexible element 13132 and the groove 13131 may be distributed along the distribution direction of the first part 1311 and the second part 1312 of the dust cover, or the groove 13131 may be disposed on the flexible element 13132.

[0109] In Embodiment 1 of this application, other structures can also be used to achieve the following: a portion of the first dust cover 131 can detach from the housing 11 and open the arc nozzle 1111 when the arc is switched on and off. As shown in Figure 7, the first end 001 of the first dust cover 131 is rotatably connected to the housing 11, and the second end 002 of the first dust cover 131 is in contact with or detachably connected to the housing 11. This simplifies the structure of the first dust cover 131 and reduces its cost.

[0110] Figure 7(a) shows the state of the first dust cover 131 when the switch is not arcing; Figure 7(b) shows the state of the first dust cover 131 when the switch is arcing.

[0111] For example, when the second end 002 of the first dust cover 131 is in contact with the housing 11, the second end 002 of the first dust cover 131 can be attached to the housing plate 110 where the jet nozzle 1111 is located. When the second end 002 of the first dust cover 131 and the housing 11 are detachably connected, the second end 002 of the first dust cover 131 and the housing 11 can be snapped, magnetically connected, or adhesively connected, etc.

[0112] Referring again to Figures 4 and 7, to improve the dustproof effect of the first dustproof assembly 13, the first dustproof assembly 13 may further include a first sealing member 132 disposed on the first dustproof cover 131, and the first dustproof cover 131 is sealed to the housing 11 through the first sealing member 132. It is understood that at least a portion of the first sealing member 132 fills the gap between the first dustproof cover 131 and the housing 11.

[0113] The first seal 132 can be attached to the first dust cover 131 by adhesive backing, or the first seal 132 can be disposed on the first dust cover 131 by other means.

[0114] When the first dust cover 131 includes a first part 1311 and a second part 1312, as shown in FIG4, a first sealing member 132 is disposed on the second part 1312, and the second part 1312 is sealed to the housing 11 through the first sealing member 132.

[0115] In practice, the first dust cover 131 and the housing 11 can also be sealed together by other structures, which is not limited in this embodiment of the present application.

[0116] In the first embodiment of this application, as shown in Figure 1, in order to facilitate the operation of the switch by maintenance personnel, the switch also includes an operating handle 12. The operating handle 12 is disposed inside the housing 11. The housing 11 is also provided with a clearance hole 1121. The operating handle 12 protrudes from the housing 11 through the clearance hole 1121 so that maintenance personnel can operate the above-mentioned operating handle 12 for manual disconnection of the switch or manual energy storage of the switch.

[0117] It should be noted that a switch with electric operation and manual energy storage refers to a design in which the switch is equipped with both an electric operating mechanism (electric operation) and a manual energy storage device.

[0118] The clearance hole 1121 can be provided on the cover plate 112, so that the operating handle 12 is exposed on the cover plate 112 through the clearance hole 1121, which facilitates the operation of the operating handle 12 by the maintenance personnel. Of course, the clearance hole 1121 can also be provided in other locations, and is not limited to the cover plate 112.

[0119] To facilitate operation of the aforementioned operating handle 12, the clearance hole 1121 is located in the cover plate panel 1123 of the cover plate 112.

[0120] The clearance hole 1121 connects to the moving and stationary contact action mechanism inside the switch 1. Foreign objects such as sand and dust can enter the housing 11 through the clearance hole 1121. The sand and dust entering the housing 11 through the clearance hole 1121 can cause the moving and stationary contact action mechanism to jam, resulting in the failure of the switch 1.

[0121] Referring to Figures 2 and 11, the switch also includes a second dustproof assembly 14, which includes a second dustproof cover 141. The second dustproof cover 141 is disposed on the housing 11 and can close and open the clearance hole 1121. Specifically, when maintenance personnel need to operate the operating handle 12, the second dustproof cover 141 opens the clearance hole 1121; when maintenance personnel do not need to operate the operating handle 12, the second dustproof cover 141 closes the clearance hole 1121.

[0122] Because the second dust cover 141 closes the clearance hole 1121, it reduces the amount of foreign matter such as sand and dust entering the housing 11 through the clearance hole 1121, thus reducing the amount of foreign matter entering the switch 1 and improving the reliability of the switch 1. At the same time, since the second dust cover 141 is detachably connected to the housing 11, removing the connection between the second dust cover 141 and the housing 11 allows operation of the operating handle 12 of the switch 1, avoiding interference with the maintenance operation of the switch 1 and meeting the long-term operating requirements of the power converter.

[0123] In the first embodiment of this application, the first dust cover 131 closes the spray nozzle 1111 and the second dust cover 141 closes the clearance hole 1121, so that the protection level of the switch can reach IP6X.

[0124] In Embodiment 1 of this application, in order to facilitate the second dust cover 141 in closing the clearance hole 1121, the second dust cover 141 covers the housing plate 110 where the clearance hole 1121 is located. In this case, the housing plate 110 where the clearance hole 1121 is located can also be provided with other holes, and the second dust cover 141 can cover all the holes on the housing plate 110 where the clearance hole 1121 is located, further improving the dustproof effect.

[0125] For example, the clearance hole 1121 is located in the cover panel 1123, and the second dust cover 141 covers the cover panel 1123.

[0126] To facilitate the closing and opening of the clearance hole 1121 by the second dust cover 141, the second dust cover 141 has a first end 001 and a second end 002. The first end 001 of the second dust cover 141 is rotatably connected to the housing 11, and the second end 002 of the second dust cover 141 is in contact with or detachably connected to the housing 11. To improve dustproof reliability, the second end 002 of the second dust cover 141 is detachably connected to the housing 11.

[0127] When maintenance personnel need to maintain operating switch 1, disconnect the second end 002 of the second dust cover 141 from the housing 11, flip the second dust cover 141 in a specific direction to expose the housing plate 110 where the clearance hole 1121 is located and the operating handle 12. Maintenance personnel can then operate the operating handle 12. After the operation is completed, flip the second dust cover 141 in the opposite direction and cover the housing plate 110 where the clearance hole 1121 is located to restore the dustproof function of the second dust cover 141 and improve the on-site operating experience.

[0128] For example, the first end 001 of the second dust cover 141 can be one end of the second dust cover 141 in a first direction, and the second end 002 of the second dust cover 141 can be the other end of the second dust cover 141 in the first direction. Of course, the first end 001 and the second end 002 of the second dust cover 141 can also be two ends of the second dust cover 141 in other directions.

[0129] The first end 001 of the second dust cover 141 and the housing 11 can be rotatably connected by a pivot or hinge 143. The second end 002 of the second dust cover 141 and the housing 11 can be detachably connected by a snap-fit ​​structure, fasteners, magnetic structure, or other structures.

[0130] For ease of installation and disassembly, the second end 002 of the second dust cover 141 is snapped onto the housing 11. As shown in Figures 8 and 10, the second end 002 of the second dust cover 141 is provided with a third latch 1411, and the housing 11 is provided with a slot 1122 that mates with the third latch 1411. Of course, the second end of the second dust cover 141 may also be provided with a slot 1122, and the housing 11 may also be provided with a third latch 1411.

[0131] As shown in Figure 11, to facilitate the connection of both the first end 001 and the second end 002 of the second dust cover 141 to the housing 11, the second dust cover 141 may include a dustproof panel 1412 and a dustproof side plate 1413. The dustproof panel 1412 and the clearance hole 1121 are opposite each other. The dustproof side plate 1413 is annular and connected to the periphery of the dustproof panel 1412. Part of the dustproof side plate 1413 forms the first end 001 of the second dust cover 141, and part of the dustproof side plate 1413 forms the second end 002 of the second dust cover 141. When the second dust cover 141 closes the clearance hole 1121, the dustproof side plate 1413 is located on the periphery of the cover plate 112.

[0132] The third clip 1411 mentioned above can be installed on the dustproof side panel 1413.

[0133] Referring to Figures 8 and 10, to improve the dustproof effect, the second dustproof assembly 14 further includes a second sealing element 142 disposed on the second dustproof cover 141, and the second dustproof cover 141 is sealed to the housing 11 through the second sealing element 142. Specifically, the second dustproof cover 141 is sealed to the cover plate 112 through the second sealing element 142. It can be understood that the second sealing element 142 is used to fill the gap between the second dustproof cover 141 and the cover plate 112 to prevent sand, dust, or other foreign objects from entering the front of the switch 1.

[0134] The second seal 142 is provided on the second dust cover 141 by adhesive or other means. When the second dust cover 141 includes a dustproof side plate 1413, the second seal 142 is provided on the dustproof side plate 1413.

[0135] In practice, the second dust cover 141 and the housing 11 can also be sealed and connected in other ways, and this application embodiment does not limit this.

[0136] In the first embodiment of this application, switch 1 includes a first dustproof component 13 but does not include a second dustproof component 14, or switch 1 includes a second dustproof component 14 but does not include a first dustproof component 13.

[0137] In the first embodiment of this application, the housing 11 can also be other structures, and is not limited to a housing structure including the housing body 111 and the cover plate 112. After the structure of the housing 11 changes, the positions of the arc spray nozzle 1111 and the clearance hole 1121 are adjusted according to the structural change of the housing 11, as long as the arc spray nozzle 1111 and the clearance hole 1121 are set on the housing 11, and the arc spray and the installation operation handle 12 are guaranteed.

[0138] In the first embodiment of this application, since switch 1 has the above-mentioned technical effects, the power converter provided in the first embodiment of this application includes the above-mentioned switch 1, and the power converter provided in the first embodiment of this application also has the corresponding technical effects, which will not be repeated here.

[0139] In Embodiment 1 of this application, the power converter can be an inverter, a converter, or a DC-DC converter, etc. Embodiment 1 of this application does not limit the type of power converter.

[0140] Example 2 of this application

[0141] The main difference between the switch 1 provided in Embodiment 2 of this application and Embodiment 1 of this application lies in the first dustproof component 13.

[0142] As shown in Figures 12 and 13, in Embodiment 2 of this application, the first dustproof component 13 includes a first dustproof cover 131, which is disposed on the housing 11. The first dustproof cover 131 closes the spray nozzle 1111, and a portion of the first dustproof cover 131 can detach from the housing 11 and open the spray nozzle 1111 when the spray nozzle is switched on or off. Specifically, a portion of the first dustproof cover 131 can deform and detach from the housing 11 when the spray nozzle is switched on or off to open the spray nozzle 1111. Further explanation of this part can be found above and will not be repeated here.

[0143] In the second embodiment of this application, the first dust cover 131 is a flexible sheet. In this case, a portion of the first dust cover 131 is connected to the housing 11, and a portion of the first dust cover 131 is in contact with the housing 11. Under the impact of the jet arc, the portion of the first dust cover 131 that is in contact with the housing 11 separates from the housing 11.

[0144] Figure 12 shows the state of the first dust cover 131 when the switch is not arcing; Figure 13 shows the state of the first dust cover 131 when the switch is arcing.

[0145] As shown in Figures 13 and 14, to facilitate the installation of the first dust cover 131, the first dustproof assembly 13 also includes a dustproof frame 134. The dustproof frame 134 is connected to the housing 11, and the through hole 1341 of the dustproof frame 134 communicates with the spray nozzle 1111. The first dust cover 131 is connected to the dustproof frame 134 and closes the through hole 1341 to close the spray nozzle 1111. This simplifies the structure of the first dust cover 131, simplifies the structure of the first dustproof assembly 13, and reduces the cost of the first dustproof assembly 13.

[0146] To facilitate arc venting, the first dust cover 131 has a first end 001 and a second end 002. The first end 001 of the first dust cover 131 is connected to the dust cover frame 134, and the second end 002 of the first dust cover 131 is in contact with the dust cover frame 134. In this way, the dust cover frame 134 serves to support the first dust cover 131, facilitating its installation. In this structure, under the impact of the arc, the portion of the first dust cover 131 that is in contact with the dust cover frame 134 separates from the dust cover frame 134, thus separating a portion of the first dust cover 131 from the housing 11, opening the arc nozzle 1111, and achieving arc venting.

[0147] The first end of the first dust cover 131 can be connected to the dust cover frame by means of adhesive backing or fasteners.

[0148] To ensure stability, the dustproof frame 134 and the housing 11 are fixedly connected. For example, the dustproof frame 134 and the housing 11 are fixedly connected by fasteners or other means.

[0149] In the second embodiment of this application, the switch 1 may include the second dustproof component 14, or it may not include the second dustproof component 14.

[0150] In Embodiment 2 of this application, the other structures of switch 1 and power converter can be referred to the previous text, and will not be repeated here.

[0151] Example 3 of this application

[0152] The main difference between the switch 1 provided in Embodiment 3 of this application and Embodiment 1 of this application lies in the second dustproof component 14.

[0153] As shown in Figures 15-17, in Embodiment 3 of this application, the second dustproof component 14 covers the housing plate where the clearance hole 1121 is located, and the second dustproof component 14 has a magnetic structure. Specifically, the housing 11 is provided with a first magnetic member 15, and the second dustproof component 14 also includes a second magnetic member 144 that is adsorbed and connected to the first magnetic member 15. The second dustproof cover 141 is disposed on the second magnetic member 144. In this way, when the second magnetic member 144 is adsorbed on the first magnetic member 15, the second dustproof cover 141 is fixed on the housing 11, sealing the clearance hole 1121, thus playing a dustproof role and reducing the entry of foreign objects such as sand and dust into the switch 1. When maintenance personnel need to maintain switch 1, they can disconnect the first magnetic component 15 and the second magnetic component 144, remove the second dustproof component 14, and expose the operating handle 12. Maintenance personnel can then operate the operating handle 12, avoiding interference with the maintenance of switch 1 and meeting the long-term operation requirements of the power converter. After the operation is completed, the second magnetic component 144 can be attached to the first magnetic component 15 and the cover panel 1123 of the switch cover plate 112 can be covered to restore the dustproof function of switch 1, effectively improving the on-site operation experience.

[0154] During the disassembly and installation of the second dustproof component 14, no space is required at the top of the housing 11. Therefore, the switch provided in Embodiment 2 of this application can be applied to scenarios where there is insufficient space at the top of the switch 1 inside the power converter. Of course, it can also be applied to scenarios where there is sufficient space at the top of the switch 1 inside the power converter.

[0155] For ease of installation, the first magnetic component 15 and the second magnetic component 144 can both be magnetic frames, with the second dust cover 141 covering the second magnetic component 144, or the second magnetic component 144 can be located inside the second magnetic component 144.

[0156] In Embodiment 3 of this application, switch 1 may or may not include the first dustproof component 13. When switch 1 includes the first dustproof component 13, the first dustproof component 13 provided in Embodiment 1 of this application or the first dustproof component 13 provided in Embodiment 2 of this application may be used.

[0157] In Embodiment 3 of this application, the other structures of switch 1 and power converter can be referred to the previous text, and will not be repeated here.

[0158] Example 4 of this application

[0159] The main difference between the switch 1 provided in Embodiment 4 of this application and Embodiment 1 of this application lies in the second dustproof component 14.

[0160] As shown in Figures 18 and 19, in Embodiment 4 of this application, the second dust cover 141 is disposed in the clearance hole 1121, and the second dust cover 141 and the clearance hole 1121 are sealed together. The second dust cover 141 has a clearance groove 14141 for the clearance operation handle 12. It is understood that the second dust cover 141 is detachably disposed in the clearance hole 1121. In this way, the second dust cover 141 covers the operating handle 12, effectively sealing the gap between the clearance hole 1121 and the operating handle 12. This allows the second dust cover 141 to seal the clearance hole 1121, reducing the entry of foreign objects such as sand and dust into the switch. When maintenance personnel need to maintain the operating switch 1, they can simply pull out the second dust cover 141 from the housing 11 to remove it. After removing the second dust cover 141, the cover plate 112 and the operating handle 12 are exposed, allowing maintenance personnel to operate the operating handle 12 without affecting the maintenance operation of the switch 1. This meets the long-term operation requirements of the power converter. After the work is completed, the second dust cover 141 is installed and the clearance hole 1121 is covered to restore the dustproof function of the switch 1, effectively improving the on-site operating experience.

[0161] In Embodiment 4 of this application, the second dust cover 141 is smaller in size, which reduces the cost of the second dustproof component 14.

[0162] In Embodiment 4 of this application, the second dust cover 141 and the clearance hole 1121 can be sealed together by interference fit or transition fit. In this way, there is no need to set up a separate sealing element, which reduces the number of parts of the second dust cover 14 and further reduces the cost of the second dust cover 14.

[0163] Of course, the second dust cover 141 and the clearance hole 1121 can also be sealed together by a sealing element, and this application does not limit this in Embodiment 4.

[0164] To improve the stability of the sealing performance, the second dust cover 141 and the housing 11 are detachably fixedly connected. As shown in Figures 19 and 20, for easy installation and disassembly, the second dust cover 141 is provided with a second snap-fit ​​1416, which engages with the housing plate 110 where the clearance hole 1121 is located. As mentioned above, the housing plate where the clearance hole 1121 is located is the cover panel 1123, and the second snap-fit ​​1416 engages with the cover panel 1123. In this way, the clearance hole 1121 and the housing plate where the clearance hole 1121 is located are fully utilized, eliminating the need for a separate structure to cooperate with the second snap-fit ​​1416, thus simplifying the structure of the housing.

[0165] It should be noted that the second snap-fit ​​1416 and the clearance hole 1121 are connected to the housing plate, which achieves an interference fit or transition fit between the second dust cover 141 and the clearance hole 1121.

[0166] In practice, when the second dust cover 141 and the clearance hole 1121 are sealed together by an interference fit or a transition fit, the second dust cover 141 may be provided with a second snap fastener 1416; or, when the second dust cover 141 is provided with a second snap fastener 1416, the second dust cover 141 and the clearance hole 1121 may be sealed together by an interference fit or a transition fit.

[0167] In Embodiment 4 of this application, the second dust cover 141 includes a dust cover body 1414, which is used to close the relief hole 1121. To improve the sealing performance, the outer contour of the dust cover body 1414 is located around the relief hole 1121. Of course, the circumferential surface of the dust cover body 1414 and the hole wall of the relief hole 1121 can also fit together.

[0168] The clearance groove 14141 mentioned above is provided on the dust cover body 1414, the second buckle 1416 is provided on one side of the dust cover body 1414, and the dust cover handle 1415 is located on the other side of the dust cover body 1414.

[0169] To improve the stability of the connection between the second dust cover 141 and the housing 11, the second buckle 1416 can be annular, and the shape of the second buckle 1416 is adapted to the shape of the relief hole 1121. Of course, there can also be two or more second buckles 1416, distributed circumferentially along the relief hole 1121.

[0170] In practice, the second dust cover 141 and the housing 11 can also be connected by other snap-fit ​​structures. Of course, the second dust cover 141 and the housing 11 can also be detachably fixed by magnetic structures or other structures, and are not limited to the structures described above.

[0171] To facilitate the installation and removal of the second dust cover 141, a dust cover handle 1415 is provided on the second dust cover 141. It is understood that the dust cover handle 1415 is located on the side of the second dust cover 141 opposite to the clearance hole 1121, ensuring that the dust cover handle 1415 is exposed on the outside of the housing 11. In this way, maintenance personnel can use the dust cover handle 1415 to complete the installation and removal of the second dust cover 141.

[0172] In Embodiment 4 of this application, switch 1 may or may not include the first dustproof component 13. When switch 1 includes the first dustproof component 13, switch 1 may use the first dustproof component 13 provided in Embodiment 1 of this application, or it may use the first dustproof component 13 provided in Embodiment 2 of this application.

[0173] In Embodiment 4 of this application, the other structures of switch 1 and power converter can be referred to the previous text, and will not be repeated here.

[0174] The technical features mentioned above, those to be mentioned below, and those shown individually in the accompanying drawings can be combined arbitrarily, provided that the combined technical features are not contradictory. All feasible combinations of features are the technical content explicitly described herein. Any one of the multiple technical features contained in the same statement can be applied independently, without necessarily being applied together with other technical features.

[0175] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A switch, characterized in that, include: The housing (11) is provided with an arc spray nozzle (1111); the first dustproof component (13) includes a first dustproof cover (131), which is disposed on the housing (11), and the first dustproof cover (131) closes the arc spray nozzle (1111), and a portion of the first dustproof cover (131) can detach from the housing (11) and open the arc spray nozzle (1111) when the arc spray is switched on or off.

2. The switch according to claim 1, characterized in that, A portion of the first dust cover (131) is capable of deforming and detaching from the housing (11) when the arc is switched on and off, so as to open the arc nozzle (1111).

3. The switch according to claim 2, characterized in that, The first dust cover (131) includes: a first dust cover part (1311), a second dust cover part (1312), and a deformable structure (1313); wherein, the first dust cover part (1311) is connected to the housing (11), the second dust cover part (1312) is connected to or in contact with the housing (11), the deformable structure (1313) connects the second dust cover part (1312) and the first dust cover part (1311), the deformable structure (1313) is capable of deforming when the arc spraying is switched on and off, and the second dust cover part (1312) is capable of detaching from the housing (11) and opening the arc spraying port (1111) when the arc spraying is switched on and off.

4. The switch according to claim 3, characterized in that, The deformable structure (1313) includes at least one of a groove (13131) and a flexible element (13132).

5. The switch according to claim 4, characterized in that, When the deformable structure (1313) includes a groove (13131), the groove (13131) includes a gradient groove (02), the width of the gradient groove (02) gradually decreases from the opening (04) of the groove (13131) to the bottom (03) of the groove (13131), and the width direction of the groove (13131) is the distribution direction of the first part (1311) and the second part (1312) of the dust cover.

6. The switch according to claim 3, characterized in that, The first part (1311) of the dust cover and the housing (11) are fixedly connected, and the end (13121) of the second part (1312) of the dust cover away from the first part (1311) of the dust cover is engaged with the housing (11).

7. The switch according to claim 6, characterized in that, The second part (1312) of the dust cover is provided with a first buckle (133), which is located inside the spray nozzle (1111) and is engaged with the housing plate (110) where the spray nozzle (1111) is located.

8. The switch according to claim 2, characterized in that, The first dust cover (131) is a flexible sheet.

9. The switch according to claim 8, characterized in that, The first dustproof component (13) further includes a dustproof frame (134), which is connected to the housing (11). The through hole (1341) of the dustproof frame (134) is connected to the spray nozzle (1111). The first dustproof cover (131) is connected to the dustproof frame (134) and closes the through hole (1341).

10. The switch according to claim 1, characterized in that, The first end (001) of the first dust cover (131) is rotatably connected to the housing (11), and the second end (002) of the first dust cover (131) is in contact with or detachably connected to the housing (11).

11. The switch according to claim 1, characterized in that, The first dustproof assembly (13) further includes a first sealing element (132) disposed on the first dustproof cover (131), and the first dustproof cover (131) is sealed to the housing (11) through the first sealing element (132).

12. The switch according to any one of claims 1-11, characterized in that, Also includes: An operating handle (12) is disposed inside the housing (11), the housing (11) is provided with a clearance hole (1121), and the operating handle (12) protrudes from the housing (11) through the clearance hole (1121); a second dustproof assembly (14) is provided, the second dustproof assembly (14) includes a second dustproof cover (141), the second dustproof cover (141) is disposed in the housing (11), and the second dustproof cover (141) is capable of closing and opening the clearance hole (1121).

13. The switch according to claim 12, characterized in that, The second dust cover (141) is disposed in the relief hole (1121), and the second dust cover (141) and the relief hole (1121) are sealed together. The second dust cover (141) has a relief groove (14141) for accommodating the operating handle (12).

14. The switch according to claim 13, characterized in that, The second dust cover (141) and the relief hole (1121) are sealed together by an interference fit or a transition fit; and / or, the second dust cover (141) is provided with a second buckle (1416), which engages with the housing plate (110) where the relief hole (1121) is located.

15. The switch according to claim 13, characterized in that, The second dust cover (141) is provided with a dust cover handle (1415).

16. The switch according to claim 12, characterized in that, The second dust cover (141) covers the housing plate (110) where the clearance hole (1121) is located.

17. The switch according to claim 16, characterized in that, The second dust cover (141) has a first end (001) and a second end (002) opposite to each other. The first end (001) of the second dust cover (141) is rotatably connected to the housing (11), and the second end (002) of the second dust cover (141) is in contact with or detachably connected to the housing (11).

18. The switch according to claim 17, characterized in that, The second dust cover (141) includes a dust cover panel (1412) and a dust cover side panel (1413), wherein the dust cover side panel (1413) is annular and is connected to the periphery of the dust cover panel (1412). A portion of the dust cover side panel (1413) is the first end (001) of the second dust cover (141), and a portion of the dust cover side panel (1413) is the second end (002) of the second dust cover (141).

19. The switch according to claim 16, characterized in that, The housing (11) is provided with a first magnetic suction member (15), and the second dustproof assembly (14) further includes a second magnetic suction member (144) that is adsorbed and connected to the first magnetic suction member (15), and the second dustproof cover (141) is disposed on the second magnetic suction member (144).

20. The switch according to claim 16, characterized in that, The second dustproof assembly (14) further includes a second seal (142) disposed on the second dustproof cover (141), and the second dustproof cover (141) is sealed to the housing (11) through the second seal (142).

21. The switch according to any one of claims 1-11, characterized in that, The housing (11) includes a housing body (111) and a cover plate (112), the cover plate (112) and the housing body (111) are sealed together, and the spray nozzle (1111) is disposed on the housing body (111).

22. A power converter, characterized in that, include: The housing (2) includes the switch (1) as claimed in any one of claims 1-21; wherein the switch (1) is located inside the housing (2).

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