Heat dissipation type frequency conversion box structure

Abstract

The utility model discloses a heat dissipation type frequency conversion box structure, which comprises a frequency conversion box main body, the frequency conversion box main body comprises a back plate and a vertical side plate, an installation cavity is formed between the back plate and the vertical side plate, an installation opening used for installing a frequency conversion plate is formed in the front part of the installation cavity, and a heat dissipation metal cover plate is detachably arranged at the installation opening. A mounting cavity is formed in the frequency conversion box body, a mounting column and a supporting column are arranged in the mounting cavity, the front side of the supporting column is attached to the rear side of the frequency conversion plate, a first fastener used for fixing the frequency conversion plate is in threaded connection with the mounting column, an insertion opening used for being connected with a mounting support is formed in the rear side of the frequency conversion box body, and a clamping structure is arranged at the insertion opening. A lateral opening is formed in the vertical side plate, a side cover is detachably arranged at the lateral opening, and a wiring groove is formed in the side cover; the LED lamp has the advantages of being good in heat dissipation performance, high in assembly efficiency and stable in structure.

Description

Technical Field

[0001] The utility model belongs to the technical field of frequency conversion board installation, and specifically relates to a heat dissipation type frequency conversion box structure. Background Art

[0002] The frequency converter is an electrical device whose main function is to change the frequency of the power supply.

[0003] Frequency conversion boards are usually used to control AC motors. They can convert the power input signal into a motor drive signal to achieve precise control of the motor speed and power. The frequency conversion board uses IGBT (insulated gate bipolar transistor) as a power device, which can output an adjustable AC current signal to fine-tune and control the motor. Frequency conversion boards are widely used in industrial fields, ships, and petroleum occasions. In air conditioners and refrigerators, frequency conversion boards can control the mechanical compression ratio by adjusting the speed of the drive compressor motor, and then control the cooling capacity, making the output of the driver more stable and accurate.

[0004] The frequency conversion box, also called the variable frequency motor junction box, is a device that connects the motor and the power line, and is used to connect the inverter output line and the motor input line. The variable frequency motor junction box generally consists of three parts: the junction box itself, the wiring harness and the connector, which are used to connect the three-phase power supply and control signal line of the motor.

[0005] The junction box plays a vital role in the operation of the variable frequency motor. First, the quality of the junction box directly affects the safety and service life of the motor. Secondly, the connection quality of the junction box also directly affects the performance and efficiency of the motor. If the junction box is poorly connected, it will cause the motor to vibrate and make abnormal noise, and there may also be safety hazards such as fire and damage to the motor.

[0006] The problem with the existing technology is that the frequency converter board has high power and generates a lot of heat, which is more obvious when used with high-power electrical appliances. The existing frequency converter box structure has insufficient heat dissipation performance, which affects the working reliability of the frequency converter board; the existing frequency converter box has many components, a complex structure, and insufficient overall stability; the components are connected by threaded fasteners, resulting in a large number of internal threaded fasteners and low assembly efficiency. Summary of the invention

[0007] The utility model aims to solve the problems existing in the prior art and provide a heat dissipation type frequency conversion box structure, which has the advantages of good heat dissipation performance, high assembly efficiency and stable structure.

[0008] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a heat dissipation type frequency conversion box structure, including a frequency conversion box body, the frequency conversion box body includes a back plate and a vertical side plate, an installation cavity is formed between the back plate and the vertical side plate, the front part of the installation cavity is formed with an installation opening for installing the frequency conversion board, a heat dissipation metal cover plate is detachably provided at the installation opening, an installation column and a support column are provided in the installation cavity, the front side of the support column is in contact with the rear side of the frequency conversion board, a fastener for fixing the frequency conversion board is screwed on the installation column, a plug-in opening for connecting the installation bracket is provided on the rear side of the frequency conversion box body, a locking structure is provided at the plug-in opening, a lateral opening is provided on the vertical side plate, a side cover is detachably provided at the lateral opening, and a wiring groove is provided on the side cover.

[0009] In the above scheme, the main body of the frequency converter box is composed of a back plate and vertical side plates. When the frequency converter board is installed, it enters the installation cavity through the installation opening, and the rear side of the frequency converter board is supported and positioned by the support column, and then a pair of fasteners are installed on the installation column to fix the frequency converter board. The thermal conductivity and structural strength of the heat dissipation metal cover plate arranged at the installation opening are better than those of the frequency converter box main body, so as to enhance the heat dissipation effect of the frequency converter board and the structural strength of the frequency converter box main body. The plug-in opening of the frequency converter box main body is used to electrically connect the frequency converter board with the corresponding electrical appliance, and the snap-fit ​​structure is used to connect and position the frequency converter box main body with the installation bracket. The lateral opening is used for wiring to connect an external power supply, and a wiring groove is provided on the side cover to protect and position the line.

[0010] Furthermore, the support column is arranged on a vertical side plate, an upper protrusion is arranged on the vertical side plate and is located at the front side of the support column, and a clamping groove for clamping the frequency conversion board is formed between the support column and the upper protrusion.

[0011] By arranging support columns and upper protrusions on the vertical side panels to form snap-fit ​​grooves, the edge of the frequency converter board is snap-fitted and limited. The snap-fit ​​grooves and fasteners are distributed on the outer circle of the frequency converter board to jointly position the frequency converter board, reduce the number of fasteners, facilitate installation and disassembly, and realize the positioning of the frequency converter board.

[0012] Furthermore, an annular rib is provided on the top surface of the vertical side plate, a mounting groove for connecting the heat dissipation metal cover plate is formed on the inner side of the annular rib, and an operating notch is formed on the annular rib.

[0013] The annular baffle plate forms a mounting slot to cooperate with the heat dissipation metal cover plate to ensure the positioning of the heat dissipation metal cover plate, and the operating notch is provided to facilitate the installation and removal of the heat dissipation metal cover plate.

[0014] Furthermore, a second fastener for fixing the heat dissipation metal cover plate is detachably provided on the top surface of the vertical side plate, and a limiting block for cooperating with the front side surface of the heat dissipation metal cover plate is provided on the annular baffle plate.

[0015] The heat dissipation metal cover plate is positioned by fastener 2 in cooperation with the limiting block, thereby reducing the number of fasteners, facilitating installation and disassembly, and improving production efficiency.

[0016] Furthermore, the frequency conversion board is provided with a wiring terminal corresponding to the lateral opening position, the vertical side plate is formed with a terminal mounting groove corresponding to the wiring terminal, and the heat dissipation metal cover plate includes a protrusion corresponding to the position of the terminal mounting groove.

[0017] A terminal mounting groove is provided for mounting the protruding wiring terminal, and the lateral opening corresponds to the position of the wiring terminal, which is convenient for lateral wiring and routing operations, and the protrusion on the heat dissipation metal cover is used to seal the terminal mounting groove.

[0018] Furthermore, the engaging structure includes a guide plate and a stop plate, and the guide plate is provided with a threaded hole for connecting a screw.

[0019] The guide plate cooperates with the mounting bracket to provide guidance during insertion, the stop plate is used to limit the insertion depth, and the screws are connected through the threaded holes to fasten the guide plate and the mounting bracket.

[0020] Compared with the prior art, the beneficial effects of the utility model are:

[0021] 1. The inverter box body is formed by arranging a back plate and vertical side plates, and a whole heat dissipation metal cover plate is arranged at the installation opening of the inverter box body to improve the heat dissipation efficiency of the inverter board and improve the working reliability of the inverter board;

[0022] 2. The main part of the frequency converter box is an integrated structure. The frequency converter box body is fixedly connected to the mounting bracket through a snap-fit ​​structure. The structure is stable. The heat dissipation metal cover at the installation opening is used to strengthen the structure of the frequency converter box body and improve the overall force stability.

[0023] 3. The frequency conversion box structure is formed by the frequency conversion box body, the heat dissipation metal cover plate and the side cover, which has a simple structure and high installation efficiency; threaded fasteners are used in combination with a slot structure between the frequency conversion board and the frequency conversion box body, and between the heat dissipation metal cover plate and the frequency conversion box body, thereby reducing the number of threaded fasteners and improving installation and disassembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a structural explosion diagram of a heat dissipation type frequency conversion box structure of Example 1 of the utility model;

[0025] Figure 2 This is a structural schematic diagram of the frequency conversion box body in Example 1 of the utility model;

[0026] Figure 3 This is a schematic diagram of the installation of the heat dissipation metal cover plate in Example 1 of the utility model;

[0027] Figure 4 This is a schematic diagram of the installation of the frequency conversion board in Example 1 of the utility model;

[0028] Figure 5 This is an exploded view of the installation of the side cover in Example 1 of the utility model;

[0029] In the figure: 1. back panel; 2. vertical side panel; 3. threaded hole; 4. installation opening; 5. heat dissipation metal cover; 6. installation column; 7. support column; 8. fastener one; 9. plug-in opening; 10. installation bracket; 11. lateral opening; 12. side cover; 13. wiring groove; 14. upper protrusion; 15. snap-fit ​​groove; 16. annular rib; 17. top block; 18. operation notch; 19. fastener two; 20. limit block; 21. wiring terminal; 22. terminal installation groove; 23. protrusion; 24. guide plate; 25. stop plate; 26. frequency conversion board. DETAILED DESCRIPTION

[0030] The technical solution of the utility model will be clearly and completely described below in conjunction with the drawings in the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative labor are within the scope of protection of the utility model. In the description of the utility model, it should be noted that the terms front, back, left, right, etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, or the directions or positional relationships in which the utility model product is usually placed when used. They are only for the convenience of describing the utility model or simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed or operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0031] Example 1

[0032] like Figure 1-5As shown, a heat dissipation type frequency conversion box structure includes a frequency conversion box body, the frequency conversion box body includes a back plate 1 and a vertical side plate 2, an installation cavity is formed between the back plate 1 and the vertical side plate 2, a installation opening 4 for installing a frequency conversion board 26 is formed at the front of the installation cavity, a heat dissipation metal cover plate 5 is detachably provided at the installation opening 4, a mounting column 6 and a support column 7 are provided in the installation cavity, the front side of the support column 7 is in contact with the rear side of the frequency conversion board 26, a fastener 8 for fixing the frequency conversion board 26 is screwed on the mounting column 6, a plug-in opening 9 for connecting a mounting bracket 10 is provided on the rear side of the frequency conversion box body, a snap-fit ​​structure is provided at the plug-in opening 9, a lateral opening 11 is provided on the vertical side plate 2, a side cover 12 is detachably provided at the lateral opening 11, and a wiring groove 13 is provided on the side cover 12.

[0033] In the above scheme, the main body of the frequency conversion box is composed of a back plate 1 and a vertical side plate 2. When the frequency conversion board 26 is installed, it enters the installation cavity through the installation opening 4, and the rear side of the frequency conversion board 26 is supported and positioned by the support column 7, and then the fastener 8 is installed on the installation column 6 to fix the frequency conversion board 26. The heat dissipation metal cover plate 5 arranged at the installation opening 4 has better thermal conductivity and structural strength than the frequency conversion box main body, so as to enhance the heat dissipation effect of the frequency conversion board 26 and the structural strength of the frequency conversion box main body. The plug-in opening 9 of the frequency conversion box main body is used to electrically connect the frequency conversion board 26 with the corresponding electrical appliance, and the clamping structure is used to connect and position the frequency conversion box main body with the installation bracket 10. The lateral opening 11 is used for wiring to connect an external power supply, and a wiring groove 13 is provided on the side cover 12 to protect and position the line.

[0034] Fastener one 8 and fastener two 19 include screws, and the frequency conversion board 26 is provided with a connection hole for cooperating with fastener one 8. The main body of the frequency conversion box is made of plastic, and the heat dissipation metal cover plate 5 is an aluminum plate. The mounting column 6 and the support column 7 can be set on the back plate 1 or the vertical side plate 2. The vertical side plate 2 is perpendicular to the direction of the back plate 1. The main body of the frequency conversion box is provided with a lateral column at the lateral opening 11, and a screw hole is provided in the middle of the lateral column, and a screw for fixing the side cover 12 is screwed into the screw hole. The main part of the frequency conversion box is an integrated structure that directly bears the weight of the frequency conversion board 26, the side cover 12 and the linear speed pull, and is directly fixed to the mounting bracket 10 without transfer, with strong supporting performance and good stability.

[0035] Furthermore, the support column 7 is disposed on the vertical side plate 2 , and an upper protrusion 14 is disposed on the vertical side plate 2 at the front side of the support column 7 , and a snap-fitting groove 15 for snap-fitting the frequency conversion board 26 is formed between the support column 7 and the upper protrusion 14 .

[0036] By arranging the support column 7 and the upper protrusion 14 on the vertical side plate 2, a snap-fit ​​groove 15 is formed to snap-fit ​​and limit the edge of the frequency conversion board 26. The snap-fit ​​groove 15 and the fastener 8 are distributed on the outer circle of the frequency conversion board 26 to jointly position the frequency conversion board 26, reduce the number of fasteners 8, facilitate installation and disassembly, and realize the positioning of the frequency conversion board 26.

[0037] Two engaging grooves 15 and a fastener 8 are provided to position the frequency conversion board 26 . The two engaging grooves 15 and the fastener are distributed in a triangular shape, and the installation cavity leaves an operating space for the frequency conversion board 26 to cooperate with the engaging grooves 15 .

[0038] Furthermore, an annular rib 16 is disposed on the top surface of the vertical side plate 2 , and a mounting groove for connecting the heat dissipation metal cover plate 5 is formed on the inner side of the annular rib 16 , and an operating notch 18 is formed on the annular rib 16 .

[0039] The annular baffle forms a mounting slot to cooperate with the heat dissipation metal cover plate 5 to ensure the positioning of the heat dissipation metal cover plate 5. The operation notch 18 is provided to facilitate the installation and removal of the heat dissipation metal cover plate 5.

[0040] Furthermore, the top surface of the vertical side plate 2 is detachably provided with a fastener 19 for fixing the heat dissipation metal cover plate 5 , and the annular baffle is provided with a limit block 20 for cooperating with the front side surface of the heat dissipation metal cover plate 5 .

[0041] The heat dissipation metal cover plate 5 is positioned by the second fastener 19 in cooperation with the limiting block 20, thereby reducing the number of fasteners, facilitating installation and disassembly, and improving production efficiency.

[0042] The mounting slot leaves an operating space for the heat dissipation metal cover plate 5 to be engaged with the limiting block 20 .

[0043] Furthermore, the frequency conversion board 26 is provided with a terminal 21 corresponding to the position of the lateral opening 11, the vertical side plate 2 is formed with a terminal mounting groove 22 corresponding to the terminal 21, and the heat dissipation metal cover plate 5 includes a protrusion 23 corresponding to the position of the terminal mounting groove 22.

[0044] The terminal installation groove 22 is provided for installing the protruding terminal 21 , and the lateral opening 11 corresponds to the position of the terminal 21 , which is convenient for lateral wiring and routing operations. The protrusion 23 on the heat dissipation metal cover plate 5 is used to seal the terminal installation groove 22 .

[0045] The limit block 20 is arranged at the protruding portion 23 , and the limit block 20 and the fastener 2 19 are arranged on two sides of the heat dissipation metal cover plate 5 .

[0046] Furthermore, the engaging structure comprises a guide plate 24 and a stop plate 25 , and the guide plate 24 is provided with a threaded hole 3 for connecting a screw.

[0047] The guide plate 24 cooperates with the mounting bracket 10 to provide guidance during insertion, the stop plate 25 is used to limit the insertion depth, and screws are connected through the threaded holes 3 to fasten the guide plate 24 and the mounting bracket 10.

[0048] A top block 17 may be disposed on the inner side of the guide plate 24 to fit with the front side of the mounting bracket 10 for limiting position.

[0049] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A heat dissipation type frequency conversion box structure, characterized in that: The utility model comprises a frequency conversion box body, wherein the frequency conversion box body comprises a back plate and a vertical side plate, an installation cavity is formed between the back plate and the vertical side plate, an installation opening for installing the frequency conversion board is formed at the front of the installation cavity, a heat dissipation metal cover plate is detachably provided at the installation opening, an installation column and a support column are provided in the installation cavity, the front side of the support column is in contact with the rear side of the frequency conversion board, a fastener for fixing the frequency conversion board is screwed on the installation column, a plug-in opening for connecting the installation bracket is provided on the rear side of the frequency conversion box body, a locking structure is provided at the plug-in opening, a lateral opening is provided on the vertical side plate, a side cover is detachably provided at the lateral opening, and a wiring groove is provided on the side cover.

2. The heat dissipation type frequency conversion box structure according to claim 1, characterized in that: The support column is arranged on a vertical side plate, an upper protrusion is arranged on the vertical side plate and is located at the front side of the support column, and a clamping groove for clamping the frequency conversion board is formed between the support column and the upper protrusion.

3. The heat dissipation type frequency conversion box structure according to claim 1, characterized in that: The top surface of the vertical side plate is provided with an annular rib, the inner side of the annular rib is formed with a mounting groove for connecting the heat dissipation metal cover plate, and the annular rib is provided with an operating notch.

4. The heat dissipation type frequency conversion box structure according to claim 3, characterized in that: The top surface of the vertical side plate is detachably provided with a second fastener for fixing the heat dissipation metal cover plate, and the annular retaining edge is provided with a limit block for cooperating with the front side surface of the heat dissipation metal cover plate.

5. The heat dissipation type frequency conversion box structure according to claim 1, characterized in that: The frequency conversion board is provided with a wiring terminal corresponding to the lateral opening position, the vertical side plate is formed with a terminal installation groove corresponding to the wiring terminal, and the heat dissipation metal cover plate includes a protrusion corresponding to the position of the terminal installation groove.

6. The heat dissipation type frequency conversion box structure according to claim 1, characterized in that: The clamping structure comprises a guide plate and a stop plate, and the guide plate is provided with a threaded hole for connecting a screw.

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