A dustproof fan for a frequency converter

Abstract

This utility model relates to a dustproof fan for a frequency converter, comprising a fan housing, an inner cavity of which a motor is installed, and a guide vane is mounted on the motor output shaft. Dustproof frames are provided at both the air inlet and outlet of the fan housing, and a filter screen is installed on the surface of the dustproof frames. Pins are installed at the four corners of the dustproof frames, and corresponding insertion holes are made on the fan housing for initial positioning. A mounting groove is made on the surface of the dustproof frame, and a connecting plate is installed within the groove. A spring is installed between the connecting plate and the mounting groove, and a limiting strip is installed at the connecting end of the connecting plate. A corresponding insertion groove and a limiting groove are made on the fan housing. During installation, the connecting plate is inserted into the insertion groove, and the spring drives the limiting strip into the limiting groove, forming a secondary fixation. During disassembly, pressing the connecting plate disengages the limiting strip from the limiting groove, and then pulling out the connecting plate and pins allows for quick removal of the dustproof frame and filter screen. This structure enables convenient removal and installation of the filter screen, facilitating regular cleaning or replacement and effectively improving maintenance efficiency.

Description

Technical Field

[0001] This utility model relates to the field of fans, specifically to a dustproof fan for a frequency converter. Background Technology

[0002] In the field of inverter heat dissipation technology, dustproof fans are key heat dissipation components, and their structural design directly affects the heat dissipation efficiency and service life of the equipment. Existing inverter dustproof fans usually require dustproof structures at the air inlet and outlet to prevent dust from entering, but the ease of disassembly and maintenance of the filter has always been a key focus of technological improvement.

[0003] Currently, the dustproof structure of some inverter dustproof fans adopts traditional fixing methods, such as screw fastening or complex buckle connection. This makes it necessary to use tools and the operation steps are cumbersome when disassembling the filter, resulting in low maintenance efficiency. In addition, if the filter cannot be quickly disassembled and cleaned after dust accumulation, it will lead to a decrease in heat dissipation performance, or even cause equipment overheating failure due to dust accumulation, increasing the maintenance cost and downtime risk of the equipment. Utility Model Content

[0004] The purpose of this utility model is to solve the above defects and provide a dustproof fan for frequency converters. It enables convenient disassembly and assembly of the filter screen, solving the technical problem that if the filter screen cannot be quickly disassembled and cleaned after dust accumulation, it will lead to a decrease in heat dissipation performance, or even cause equipment overheating failure due to dust accumulation, which increases the maintenance cost and downtime risk of the equipment.

[0005] The objective of this utility model is achieved through the following means:

[0006] A dustproof fan for a frequency converter includes a fan housing, an inner cavity of which a motor is installed. A guide vane is mounted on the output shaft of the motor. Dustproof frames are provided at both the air inlet and outlet of the fan housing. Filter screens are provided on the surface of each dustproof frame. Pins are installed at the four corners of each dustproof frame. Insertion holes are provided on the surface of the fan housing corresponding to the pins. Mounting grooves are provided on the surface of each dustproof frame. Insertion plates are provided within the inner cavities of each mounting groove. Springs are installed between the insertion plates and the mounting grooves. Limit strips are installed at the connecting ends of the insertion plates. Insertion slots are provided on the surface of the fan housing corresponding to the insertion plates. Limit grooves are provided within the inner cavities of each insertion slot.

[0007] Furthermore, a bracket is mounted on the surface of the motor, and support feet are installed at the connecting ends of the bracket. The support feet are in contact with the inner wall of the fan housing. The bracket is made of high-strength metal material, which can effectively enhance the load-bearing capacity of the bracket. When the motor vibrates during operation, it can ensure that the bracket will not easily deform or be damaged, thereby ensuring the stability of the motor installation and reducing the noise caused by motor shaking and the impact on other components.

[0008] Furthermore, bolts are screwed onto the surface of the support feet of the bracket. These bolts penetrate the support feet and are screwed into the inner wall of the fan housing. The bolts are made of a material with good rust resistance. During long-term use of the fan, it may come into contact with moisture in the air. Using these rust-proof bolts can prevent the bolts from rusting, avoid loosening due to rust, and thus ensure the connection between the bracket and the inner wall of the fan housing, thereby ensuring the reliability of the motor installation.

[0009] Furthermore, each of the dustproof frames has a fixing groove on its surface, and a fixing frame is installed inside each fixing groove. The filter screen is installed on the surface of the fixing frame, which allows for easy replacement of the filter screen individually.

[0010] Furthermore, threaded rods are screwed onto the surface of the fixing frame, and the fixing frame is fixed to the surface of the dustproof frame by the threaded rods, which makes it easy to assemble and disassemble the fixing frame.

[0011] Furthermore, guide blocks are installed on the surface of the plug-in plate, and guide grooves are opened on the inner wall of the mounting groove at the corresponding positions of the guide blocks, so that the plug-in plate can be raised and lowered stably.

[0012] The beneficial effects of this utility model are as follows: Initial positioning is achieved through the engagement of the pin with the insertion hole on the fan housing. Simultaneously, a spring-supported connector plate is installed in the mounting groove on the surface of the dustproof frame. When the dustproof frame is in place, the connector plate is fully inserted into the insertion groove. Under the action of the spring, the limiting strip is inserted into the limiting groove on the surface of the fan housing, forming a secondary fixation. During disassembly, simply press the connector plate to disengage the limiting strip from the limiting groove, allowing the connector plate to be pulled out and the pin removed. This enables quick removal of the dustproof frame and filter, facilitating convenient disassembly and assembly of the filter, making regular cleaning or replacement easier, and effectively improving maintenance efficiency. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the installation structure of the guide vane of this utility model;

[0015] Figure 3 This is a schematic diagram of the structure of the dustproof frame of this utility model;

[0016] Figure 4 This is a schematic diagram of the structure of the fan housing of this utility model;

[0017] Figure 5 This is a schematic diagram of the mounting groove of this utility model;

[0018] Figure 6 This is a cross-sectional view of the insertion slot of this utility model;

[0019] Figure 7 This is a schematic diagram of the structure of the fixing frame of this utility model;

[0020] In the diagram, 1. Fan housing; 2. Motor; 3. Guide vane; 4. Dustproof frame; 5. Filter screen; 6. Pin; 7. Socket; 8. Mounting slot; 9. Connecting plate; 10. Spring; 11. Limiting strip; 12. Connecting slot; 13. Limiting slot; 14. Bracket; 15. Bolt; 16. Fixing slot; 17. Fixing frame; 18. Threaded rod; 19. Guide block; 20. Guide slot. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0022] In this embodiment, refer to Figures 1-7 The dustproof fan of a frequency converter specifically implemented therein includes a fan housing 1, a motor 2 installed in the inner cavity of the fan housing 1, a guide vane 3 installed on the output shaft of the motor 2, a dustproof frame 4 provided at both the air inlet and air outlet of the fan housing 1, a filter screen 5 provided on the surface of the dustproof frame 4, a pin 6 installed at each of the four corners of the surface of the dustproof frame 4, a socket hole 7 opened at the corresponding position of the pin 6 on the surface of the fan housing 1, a mounting groove 8 opened at the surface of the dustproof frame 4, a plug-in plate 9 provided in the inner cavity of the mounting groove 8, a spring 10 installed between the plug-in plate 9 and the mounting groove 8, a limit strip 11 installed at the connecting end of the plug-in plate 9, a plug-in groove 12 opened at the corresponding position of the plug-in plate 9 on the surface of the fan housing 1, and a limit groove 13 opened in the inner cavity of the plug-in groove 12.

[0023] The dustproof frame 4 is initially positioned by engaging the pins 6 at its four corners with the sockets 7 on the fan housing 1. Simultaneously, the mounting groove 8 on the surface of the dustproof frame 4 contains a connector plate 9 supported by a spring 10. When the dustproof frame 4 is in place, the connector plate 9 is fully inserted into the connector groove 12. Under the action of the spring 10, the limiting strip 11 is inserted into the limiting groove 13 on the surface of the fan housing 1, forming a secondary fixation. For disassembly, simply press the connector plate 9 to disengage the limiting strip 11 from the limiting groove 13, allowing the connector plate 9 to be pulled out and the pins 6 removed, enabling quick removal of the dustproof frame 4 and filter 5. Conversely, during installation, aligning the pins 6 with the sockets 7 and pushing the dustproof frame 4 causes the connector plate 9 to be compressed by the inner wall of the connector groove 12, thus compressing the spring 10. When the limiting strip 11 reaches the position of the limiting groove 13, the spring 10 returns to its original position, completing the fixation. This facilitates convenient installation and removal of the filter 5, making it easy to clean or replace regularly and effectively improving maintenance efficiency.

[0024] A bracket 14 is mounted on the surface of the motor 2. Each end of the bracket 14 is equipped with a support foot, which contacts the inner wall of the fan housing 1. The bracket 14 is made of high-strength metal material, which can effectively enhance the load-bearing capacity of the bracket 14. When the motor 2 vibrates during operation, it can ensure that the bracket 14 will not easily deform or be damaged, thereby ensuring the stability of the motor 2 installation and reducing the noise caused by the shaking of the motor 2 and the impact on other components.

[0025] Bolts 15 are screwed onto the surface of the support feet of bracket 14. The bolts 15 penetrate the support feet of bracket 14 and are screwed into the inner wall of fan housing 1. The bolts 15 are made of a material with good rust resistance. During long-term use of the fan, it may come into contact with moisture in the air. Using this rust-proof bolt 15 can prevent the bolt 15 from rusting and avoid loosening due to rust, which would affect the connection between bracket 14 and the inner wall of fan housing 1 and ensure the reliability of motor 2 installation.

[0026] The surface of the dustproof frame 4 is provided with a fixing groove 16, and a fixing frame 17 is installed inside the fixing groove 16. The filter screen 5 is installed on the surface of the fixing frame 17, which makes it easy to replace the filter screen 5 individually.

[0027] The surface of the fixing frame 17 is screwed with threaded rods 18. The fixing frame 17 is fixed to the surface of the dustproof frame 4 by the threaded rods 18, which makes it easy to assemble and disassemble the fixing frame 17.

[0028] Guide blocks 19 are installed on the surface of the plug-in plate 9, and guide grooves 20 are opened on the inner wall of the mounting groove 8 at the corresponding positions of the guide blocks 19, so that the plug-in plate 9 can be raised and lowered stably.

[0029] During installation, the dustproof frame 4 is initially positioned by aligning it with the insertion holes 7 on the fan housing 1 using the four corner pins 6. Pushing the dustproof frame 4 causes the insertion plate 9, supported by a spring 10 within the mounting groove 8, to compress the spring 10 under pressure from the inner wall of the insertion groove 12. When the limiting strip 11 reaches the position of the limiting groove 13, the spring 10 resets, causing the limiting strip 11 to insert into the limiting groove 13, forming a secondary fixation and completing the installation of the dustproof frame 4 and filter 5. The motor 2 is then screwed onto the fan housing via a bracket 14 made of high-strength metal and its supporting feet. The bolts 15, which are rust-proof and have an inner wall of the shell 1, are securely installed in the inner cavity of the fan shell 1. When the filter 5 needs to be replaced, unscrew the threaded rod 18 on the surface of the fixing frame 17 and remove the fixing frame 17 from the fixing groove 16 on the surface of the dustproof frame 4 to replace the filter 5 separately. When disassembling the dustproof frame 4, press the plug plate 9 to disengage the limiting strip 11 from the limiting groove 13, pull out the plug plate 9 and pull out the pin 6 to remove the dustproof frame 4 and the filter 5. The guide block 19 on the surface of the plug plate 9 slides in the guide groove 20 on the inner wall of the mounting groove 8 to ensure the stable lifting and lowering of the plug plate 9.

[0030] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. A dustproof fan of a frequency converter, comprising a fan shell, a motor is installed in an inner cavity of the fan shell, and a guide vane is installed on an output shaft of the motor, characterized in that: The fan housing has dustproof frames at both the air inlet and outlet. Each dustproof frame has a filter screen on its surface. Pins are installed at the four corners of each dustproof frame. Holes are provided on the surface of the fan housing corresponding to the pins. Mounting grooves are provided on the surface of each dustproof frame. A connecting plate is provided within the mounting groove. A spring is installed between the connecting plate and the mounting groove. Limit strips are installed at the connecting ends of the connecting plates. Insertion slots are provided on the surface of the fan housing corresponding to the insertion plates. Limit slots are provided within the insertion slots. The surface of the motor is equipped with a bracket, and the connecting ends of the bracket are all equipped with support feet, which are in contact with the inner wall of the fan housing. The surface of each dustproof frame is provided with a fixing groove, and a fixing frame is installed inside each fixing groove. The filter screen is installed on the surface of the fixing frame. Each surface of the fixing frame is screwed with a threaded rod, and the fixing frame is fixed to the surface of the dustproof frame by the threaded rod; Guide blocks are installed on the surface of each plug-in plate, and guide grooves are opened on the inner wall of each mounting groove at positions corresponding to the guide blocks.

2. The dustproof fan for a frequency converter according to claim 1, characterized in that: Bolts are screwed onto the surface of the support feet of the bracket, and the bolts penetrate the support feet of the bracket and are screwed into the inner wall of the fan housing.

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