Dustproof structure

Abstract

The utility model provides a dustproof structure. The dustproof structure comprises a shell, a relay and a dustproof sleeve, a connecting column is arranged on the relay; the relay is located on the first side of the shell. The dustproof sleeve is sleeved on the relay, and the connecting column passes through the dustproof sleeve and the housing and is clamped on the housing. According to the dustproof structure, the dustproof sleeve is arranged, the air duct and the relay are thoroughly isolated in a physical mode, and normal work of the relay in a high-pollution environment is ensured. On the premise that the current basic performance, the installation mode and the heat dissipation capability of the relay are not changed, the short circuit condition caused by dust and metal dust enrichment can be completely eradicated. And moreover, the dustproof sleeve is arranged, so that the operation steps and the operation mode are not influenced, the device can be compatible with previous versions, and the compatibility is high.

Description

Technical Field

[0001] This application belongs to the field of frequency converter technology, and more specifically, relates to a dustproof structure. Background Technology

[0002] With the advancement of cost reduction and miniaturization of frequency converters, the bypass circuit has been changed from the original contactor to a relay board, and its location has been changed from inside the power unit to inside the air duct.

[0003] This change significantly reduced costs, but the PCB was directly exposed in the air duct, which made the pins prone to short circuits due to the accumulation of dust and metal dust. Although there were measures such as PCB slotting and conformal coating, there was still a chance of short circuits, resulting in a poor customer experience.

[0004] Therefore, it is urgent to develop more effective dust prevention measures for relays exposed in air ducts. Utility Model Content

[0005] The purpose of this application is to provide a dustproof structure to solve the technical problem in the prior art where the PCB is directly exposed in the air duct, causing the pins to short-circuit due to the accumulation of dust and metal dust.

[0006] To achieve the above objectives, the technical solution adopted in this application is: to provide a dustproof structure, comprising:

[0007] case;

[0008] A relay, wherein a connecting post is provided on the relay; the relay is located on the first side of the housing;

[0009] A dust cover is fitted over the relay, and the connecting post passes through the dust cover and the housing, and is snapped onto the housing.

[0010] Furthermore, the dustproof structure also includes a circuit board, which is mounted on the second side of the housing, with the first side and the second side being two opposite sides of the housing; the connecting post passes through the dustproof sleeve and the housing and is connected to the circuit board.

[0011] Furthermore, the first side of the dust cover is provided with a groove, and the relay is snapped into the groove.

[0012] Furthermore, the inner sidewall of the groove has a blocking portion at its edge, the blocking portion being perpendicular to the inner sidewall of the groove and protruding into the groove; a slot is formed between the blocking portion and the groove, and the edge of the relay is engaged in the slot.

[0013] Furthermore, a through hole is provided at the bottom of the groove, and the connecting post passes through the through hole to connect with the circuit board.

[0014] Furthermore, the through holes are provided in multiple ways, and a baffle wall is provided at the bottom of the groove, so that two adjacent through holes are separated by the baffle wall.

[0015] Furthermore, multiple connecting posts are provided, and each connecting post corresponds to a through hole.

[0016] Furthermore, the second side of the dust cover is provided with an annular barrier, and the through hole is located within the area enclosed by the annular barrier; the second side and the first side are two opposing surfaces of the dust cover.

[0017] Furthermore, the housing is provided with a mating hole, and the connecting post passes through the through hole and the mating hole in sequence to connect with the circuit board.

[0018] Furthermore, the connecting post is provided with a mounting hole, the axis of which coincides with the axis of the connecting post; the circuit board is provided with a fastener, which is connected to the connecting post at the mounting hole.

[0019] The beneficial effects of the dustproof structure provided in this application are as follows: Compared with the prior art, the dustproof structure of this application, by setting a dustproof cover, completely isolates the air duct from the relay in a physical way, ensuring the normal operation of the relay in a highly polluted environment. It completely eliminates short circuits caused by the accumulation of dust and metal dust without changing the current basic performance, installation method, or heat dissipation capacity of the relay. Moreover, the dustproof cover has no impact on the operation steps or methods, and is compatible with previous versions, demonstrating strong compatibility. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application, 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 some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of an exploded structure of a dustproof structure provided in an embodiment of this application;

[0022] Figure 2 A three-dimensional structural diagram of a dust cover in a dustproof structure provided in this application embodiment. Figure 1 ;

[0023] Figure 3A three-dimensional structural diagram of a dust cover in a dustproof structure provided in this application embodiment. Figure 2 ;

[0024] Figure 4 A three-dimensional structural diagram of a relay and a dust cover in a dustproof structure provided in this application embodiment. Figure 1 ;

[0025] Figure 5 A three-dimensional structural diagram of a relay and a dust cover in a dustproof structure provided in this application embodiment. Figure 2 ;

[0026] Figure 6 A partial three-dimensional structural diagram of a dustproof structure provided in this application embodiment after the relay and circuit board are connected. Figure 1 ;

[0027] Figure 7 A partial three-dimensional structural diagram of a dustproof structure provided in this application embodiment after the relay and circuit board are connected. Figure 2 ;

[0028] Figure 8 This is a schematic diagram showing the relative position of a relay after installation in a dustproof structure provided in an embodiment of this application. Figure 1 ;

[0029] Figure 9 This is a schematic diagram showing the relative position of a relay after installation in a dustproof structure provided in an embodiment of this application. Figure 2 .

[0030] The following are the labeling elements in the figure:

[0031] 100 - Housing;

[0032] 200 - Circuit board;

[0033] 300 - Relay;

[0034] 310 - Connecting post;

[0035] 311 - Mounting hole;

[0036] 400-Dust Cover;

[0037] 410 - Groove;

[0038] 420 - Blocking section;

[0039] 430 - Through hole;

[0040] 440 - Retaining wall;

[0041] 450-Circular enclosure;

[0042] 500 - Fasteners. Detailed Implementation

[0043] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0044] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0045] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0046] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0047] This utility model is mainly applied to the power unit of high-voltage frequency converters and low-voltage frequency converters. Please refer to both. Figure 1 , Figure 8 and Figure 9 The dustproof structure provided in the embodiments of this application will now be described. This dustproof structure includes a housing 100, a relay 300, and a dust cover 400; as... Figure 4 As shown, the relay 300 is provided with a connecting post 310; the relay 300 is located on the first side of the housing 100; the dust cover 400 is sleeved on the relay 300, and the connecting post 310 passes through the dust cover 400 and the housing 100 and is snapped into the housing 100.

[0048] Compared with the prior art, the dustproof structure provided in this embodiment of the application, by setting a dustproof cover 400, completely isolates the air duct from the relay 300 by physical means, ensuring the normal operation of the relay in a highly polluted environment. It completely eliminates short circuits caused by the accumulation of dust and metal dust without changing the current basic performance, installation method, or heat dissipation capacity of the relay. Moreover, setting the dustproof cover 400 has no impact on the operation steps or methods, and is compatible with previous versions, demonstrating strong compatibility.

[0049] In this embodiment, as Figure 1 As shown, the dustproof structure also includes a circuit board 200, which is mounted on the second side of the housing 100; the first side and the second side are two opposite sides of the housing 100; the connecting post 310 passes through the dustproof sleeve 400 and the housing 100 and is connected to the circuit board 200. The circuit board 200 can be a PCB board.

[0050] In one embodiment of this application, please refer to the following: Figure 2 and Figure 6 The dust cover 400 has a groove 410 on its first side, and the relay 300 is snapped into the groove 410.

[0051] In this embodiment, by providing the groove 410, the dust cover 400 and the relay 300 are more tightly connected, ensuring that the relay 300 is securely fixed inside the dust cover 400, thereby enhancing the dustproof effect.

[0052] In one embodiment of this application, please refer to Figure 2 The inner sidewall of the groove 410 has a blocking part 420 at its edge. The blocking part 420 is perpendicular to the inner sidewall of the groove 410 and protrudes into the groove 410. A slot is formed between the blocking part 420 and the groove 410, and the edge of the relay 300 is engaged in the slot.

[0053] In this embodiment, the blocking part 420 further enhances the fixing effect of the dust cover 400 on the relay 300, preventing the intrusion of dust and metal dust. The design of the blocking part 420 not only strengthens the structural strength of the dust cover 400 but also assists in positioning during the installation and removal of the relay 300, making the entire dustproof structure more stable and reliable. Furthermore, the presence of the blocking part 420 prevents the relay 300 from shifting due to vibration or impact, thereby ensuring stable operation of the relay in harsh environments. In practical applications, this design significantly reduces maintenance costs and failure rates, improving equipment operating efficiency and service life.

[0054] It is understandable that the shape of the connection between the relay 300 and the dust cover 400 matches the shape of the groove 410 and the slot, so that the relay 300 and the dust cover 400 are connected more tightly.

[0055] In one embodiment of this application, please refer to the following: Figure 2 and Figure 3 The bottom of the groove 410 is provided with a through hole 430, and the connecting post 310 passes through the through hole 430 and is connected to the circuit board 200.

[0056] In this embodiment, by providing a through hole 430, the connecting post 310 can pass through the through hole 430 and be directly connected to the circuit board 200, simplifying the connection process while maintaining the stability of the connection. The design of the through hole 430 not only ensures the reliability of the electrical connection, but also forms a closed channel inside the dust cover 400, effectively preventing dust from entering the circuit board 200 area through the connecting post 310, further enhancing the dustproof performance of the entire system.

[0057] In one embodiment of this application, please refer to the following: Figure 2 and Figure 3 Multiple through holes 430 are provided, and a retaining wall 440 is provided at the bottom of the groove 410. Two adjacent through holes 430 are separated by the retaining wall 440.

[0058] In this embodiment, by setting up the baffle wall 440, the internal structural stability of the dust cover 400 is enhanced, which can further protect the connecting post 310 and prevent dust and metal dust from entering through the gap between the connecting post 310 and the dust cover 400. The design of the baffle wall 440 not only improves the safety of electrical connections, but also forms multiple independent channels inside the dust cover 400, ensuring that the connection between each connecting post 310 and the circuit board 200 has a good isolation effect, thereby further improving the dustproof capability of the entire system.

[0059] In one embodiment of this application, please refer to the following: Figure 4 and Figure 5 Multiple connecting posts 310 are provided, and each connecting post 310 is set in a one-to-one correspondence with the through hole 430.

[0060] In this embodiment, the connecting posts 310 and the through holes 430 are arranged in a one-to-one correspondence to ensure the accuracy and reliability of the connection. It can be understood that the number of connecting posts 310 and the number of through holes 430 are equal, and the relative positions of the multiple connecting posts 310 match the relative positions of the multiple through holes 430, with one connecting post 310 passing through each through hole 430.

[0061] For example, in this embodiment, the relay 300 is provided with four connecting posts 310, which are arranged in a rectangular array; correspondingly, the dust cover 400 is also provided with four through holes 430, which are also arranged in a rectangular array. The baffle 440 can be arranged in a cross shape, and the cross-shaped baffle 440 and the inner sidewall of the groove 410 enclose four isolation areas, with the four through holes 430 located in the four isolation areas respectively.

[0062] In one embodiment of this application, please refer to Figure 3 The second side of the dust cover 400 is provided with an annular barrier 450, and the through hole 430 is located in the area enclosed by the annular barrier 450; the second side and the first side are two opposing surfaces of the dust cover 400.

[0063] In this embodiment, by setting an annular enclosure 450, dust and metal dust can be effectively prevented from entering from the second side of the dust cover 400, thus enhancing the protective function of the dust cover 400. The design of the annular enclosure 450 not only improves the structural strength of the dust cover 400, but also forms a closed protective layer on the outside of the dust cover 400, effectively preventing dust and metal dust from directly contacting the connecting column 310, further enhancing the dustproof performance of the entire system, thereby ensuring the long-term stable operation of the entire system.

[0064] In one embodiment of this application, the housing 100 is provided with a mating hole (not shown), and the connecting post 310 passes through the through hole 430 and the mating hole in sequence to connect with the circuit board 200.

[0065] In this embodiment, the mating hole design makes the connection between the connecting post 310 and the circuit board 200 more stable while maintaining a simple connection. The mating hole design not only ensures the stability of the connection but also forms a closed channel on the housing 100, effectively preventing dust from entering the circuit board 200 area through the connecting post 310, further enhancing the dustproof performance of the entire system. The combined use of the mating hole and the through hole 430 ensures the reliability of the electrical connection while providing additional structural protection against the intrusion of dust and metal dust. This design not only improves the safety of the electrical connection but also significantly reduces maintenance costs and failure rates in practical applications, improving equipment operating efficiency and service life.

[0066] In one embodiment of this application, please refer to the following: Figure 4 and Figure 7 The connecting post 310 is provided with a mounting hole 311, the axis of the mounting hole 311 coincides with the axis of the connecting post 310; the circuit board 200 is provided with a fastener 500, the fastener 500 is connected to the connecting post 310 at the mounting hole 311.

[0067] In this embodiment, the mounting hole 311 makes the connection between the connecting post 310 and the circuit board 200 more secure, enhancing the mechanical strength of the connection. The threaded mounting hole 311 not only ensures the stability of the connection but also forms a closed channel on the connecting post 310, effectively preventing dust from entering the circuit board 200 area through the mounting hole 311, further enhancing the dustproof performance of the entire system. Furthermore, the mounting hole 311 design also prevents the connecting post 310 from loosening due to vibration or impact, thereby ensuring the stable operation of the relay in harsh environments. In practical applications, this design significantly reduces maintenance costs and failure rates, improving equipment operating efficiency and service life.

[0068] In this embodiment, the fastener 500 can be a screw, and correspondingly, the mounting hole 311 is a threaded hole; or, the fastener 500 can be a pin, and correspondingly, the mounting hole 311 is a pin hole. This embodiment preferably uses a screw as the fastener 500 and a threaded hole as the mounting hole 311. The fastener 500 is threadedly connected to the connecting post 310 at the mounting hole 311. This threaded connection not only improves the reliability of the connection but also provides convenience during disassembly and maintenance, making the operation simpler and faster.

[0069] Specifically, the connecting post 310 can be made of copper and coated with an anti-corrosion layer to improve its durability and reliability in harsh environments. The excellent conductivity of copper ensures stable current transmission, while the anti-corrosion layer effectively extends the service life of the connecting post 310 and reduces electrical failures caused by corrosion. This design not only improves the efficiency of the electrical connection but also reduces long-term operating costs, ensuring continuous and stable operation of the equipment.

[0070] In one embodiment of this application, the dust cover 400 is a silicone sleeve.

[0071] In this embodiment, the silicone sleeve possesses excellent flexibility and resistance to high and low temperatures, enabling it to adapt to various working environments. Its non-stick surface effectively prevents the adhesion of dust and dirt, thereby reducing the frequency and difficulty of maintenance. Furthermore, the excellent anti-aging properties of silicone material ensure that the dust cover 400 maintains good physical and chemical stability during long-term use, further extending the service life of the entire system.

[0072] In this embodiment, using a silicone sleeve as a dust cover 400 can not only effectively prevent dust from entering, but also absorb and buffer external impacts to a certain extent, further protecting the relay 300 from damage.

[0073] The dustproof structure provided in this application, through a series of carefully designed structural features such as the groove 410, the blocking part 420, the through hole 430, the retaining wall 440, and the annular enclosure 450, effectively protects the relay 300 and the circuit board 200. These designs not only improve the dustproof effect but also ensure the stability and reliability of the electrical connection, while achieving compatibility with existing technologies without affecting the operation steps and methods. Therefore, the dustproof structure of this application has significant technical advantages and practical value in high-pollution environments such as high-voltage frequency converter power units and low-voltage frequency converters.

[0074] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A dustproof structure, characterized in that, include: case; A relay, wherein a connecting post is provided on the relay; the relay is located on the first side of the housing; A dust cover is fitted over the relay, and the connecting post passes through the dust cover and the housing, and is snapped onto the housing.

2. The dustproof structure as described in claim 1, characterized in that, The dustproof structure also includes a circuit board, which is installed on the second side of the housing, with the first side and the second side being two opposite sides of the housing; the connecting post passes through the dustproof sleeve and the housing and is connected to the circuit board.

3. The dustproof structure as described in claim 2, characterized in that, The first side of the dust cover has a groove, and the relay is snapped into the groove.

4. The dustproof structure as described in claim 3, characterized in that, The inner sidewall of the groove has a blocking part at its edge, the blocking part is perpendicular to the inner sidewall of the groove and protrudes into the groove; a slot is formed between the blocking part and the groove, and the edge of the relay is engaged in the slot.

5. The dustproof structure as described in claim 3, characterized in that, The bottom of the groove has a through hole, through which the connecting post passes and connects to the circuit board.

6. The dustproof structure as described in claim 5, characterized in that, The through holes are provided in multiple ways, and a retaining wall is provided at the bottom of the groove, separating two adjacent through holes through the retaining wall.

7. The dustproof structure as described in claim 6, characterized in that, The connecting posts are provided in multiple ways, and each connecting post is arranged in a one-to-one correspondence with the through hole.

8. The dustproof structure as described in claim 5, characterized in that, The second side of the dust cover is provided with an annular barrier, and the through hole is located within the area enclosed by the annular barrier; the second side and the first side are two opposing surfaces of the dust cover.

9. The dustproof structure as described in claim 6, characterized in that, The housing is provided with a mating hole, and the connecting post passes through the through hole and the mating hole in sequence to connect with the circuit board.

10. The dustproof structure as described in any one of claims 2-9, characterized in that, The connecting post is provided with a mounting hole, the axis of which coincides with the axis of the connecting post; the circuit board is provided with a fastener, which is connected to the connecting post at the mounting hole.

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