Explosion-proof frequency converter

Abstract

The utility model relates to the field of frequency converters, in particular to an explosion-proof frequency converter. The explosion-proof frequency converter comprises a frequency converter main body; the heat dissipation structure is mounted on the back of the frequency converter main body and is suitable for being connected with a frequency conversion cabinet; the heat dissipation structure comprises a plurality of heat dissipation fins which are arranged side by side; the dust removal structure comprises an air knife structure mounted at the top of the heat dissipation structure and a dust collection box mounted at the bottom of the heat dissipation structure; the air knife structure is provided with an air inlet connected with external compressed air and an exhaust port which is communicated with the air inlet and extends along the outer wall of the cooling fin. According to the explosion-proof frequency converter of the utility model, after compressed air is introduced, an air knife can be formed at the exhaust port, and dust on the cooling fins can be blown to the dust collection box, and therefore, the heat dissipation performance of the heat dissipation structure can be ensured, and the frequency converter main body can be prevented from being overheated and burnt.

Description

Technical Field

[0001] This utility model relates to the field of frequency converters, and specifically to an explosion-proof frequency converter. Background Technology

[0002] A frequency converter is a power control device that uses frequency conversion technology and microelectronics technology to control an AC motor by changing the frequency of the motor's power supply.

[0003] Existing frequency converters typically consist of a converter body and a heat dissipation structure connected to the converter body. The heat dissipation structure cools the converter body to prevent overheating and damage. However, in actual use, it has been found that dust accumulates on the heat dissipation structure, reducing its heat dissipation performance and, in severe cases, causing the converter body to overheat and burn out.

[0004] Therefore, a new technical solution is needed in this field to solve the above problems. Summary of the Invention

[0005] To improve or solve the technical problem of dust accumulation on the heat dissipation structure and affecting heat dissipation performance in existing technologies, this utility model provides an explosion-proof frequency converter. The explosion-proof frequency converter includes: a frequency converter body; a heat dissipation structure installed on the back of the frequency converter body and adapted to be connected to a frequency converter cabinet; the heat dissipation structure includes multiple heat sinks arranged side-by-side; a dust removal structure including an air knife structure installed on the top of the heat dissipation structure and a dust collection box installed at the bottom of the heat dissipation structure; the air knife structure has an air inlet connected to external compressed gas and an exhaust port communicating with the air inlet and extending along the outer wall of the heat sinks.

[0006] This invention relates to an explosion-proof frequency converter, comprising a frequency converter body, a heat dissipation structure, and a dust removal structure. The heat dissipation structure is installed on the back of the frequency converter body and dissipates heat from the body. The dust removal structure includes an air knife structure and a dust collection box. The air knife structure has an air inlet connected to compressed air and an exhaust port extending along the outer wall of the heat sink. After compressed air is introduced, an air knife is formed at the exhaust port to clean the outer wall of the heat sink, preventing dust accumulation. The air knife structure and the dust collection box are respectively arranged at the top and bottom of the heat dissipation structure, blowing dust from the outer wall of the heat sink towards the dust collection box, preventing dust from splashing within the pipes between the heat sinks and falling back onto the heat sinks. Through the above configuration, this explosion-proof frequency converter can form an air knife at the exhaust port after compressed air is introduced, blowing dust from the heat sink towards the dust collection box, ensuring the heat dissipation performance of the heat dissipation structure and preventing the frequency converter body from overheating and burning out.

[0007] Furthermore, the exhaust port has opposing first and second sidewalls, the first sidewall being in the same plane as the outer wall of the heat sink.

[0008] Furthermore, a ventilation slot extending along the length of the heat sink and a compression slot communicating with the ventilation slot are provided in the air knife structure; the air inlet is communicating with the ventilation slot, and the compression slot is communicating with the exhaust port.

[0009] Furthermore, the air blade structure and the heat dissipation structure are detachably fixedly connected by bolts.

[0010] Furthermore, a through hole is provided on the bottom plate of the dust collection box facing away from the heat dissipation structure, and a filter screen is arranged at the through hole.

[0011] Furthermore, the dust collection box is slidably installed below the heat dissipation structure and the inverter body. With this arrangement, the dust collection box is slidably positioned below the heat dissipation structure and the inverter body. When compressed air is introduced through the air knife structure, the dust collection box, positioned below the heat dissipation structure, can collect dust blown off the heat dissipation structure. When the air knife structure stops blowing air, the dust collection box slides to below the inverter body, preventing the internal cooling air ducts of the inverter control cabinet from blowing dust from the dust collection box towards the heat dissipation structure.

[0012] Furthermore, a first mounting plate is fixed below the heat dissipation structure, and a drive motor is mounted on the first mounting plate. The drive motor is connected to a threaded post that forms a threaded connection with the dust collection box. A second mounting plate is mounted below the inverter body, and the end of the threaded post away from the drive motor is rotatably mounted on the second mounting plate.

[0013] Furthermore, a guide post is provided between the first mounting plate and the second mounting plate, and a guide hole matching the guide post is provided on the ash collection box.

[0014] In summary, compared with the prior art, this utility model has the following beneficial effects:

[0015] (1) The dust removal structure includes an air knife structure and a dust collection box. The air knife structure has an air inlet connected to compressed air and an exhaust port extending along the outer wall of the heat sink. After compressed air is introduced, an air knife is formed at the exhaust port to clean the outer wall of the heat sink and prevent dust accumulation. The air knife structure and the dust collection box are respectively arranged at the top and bottom of the heat dissipation structure. They can blow the dust on the outer wall of the heat sink to the dust collection box to prevent dust from splashing in the pipes between the heat sinks and falling back onto the heat sink.

[0016] (2) The dust collection box is slidably arranged below the heat dissipation structure and the main body of the frequency converter. When compressed air is introduced into the air knife structure, the dust collection box is arranged below the heat dissipation structure and can collect the dust blown off the heat dissipation structure. When the air knife structure stops blowing air, the dust collection box slides to the bottom of the main body of the frequency converter, which can prevent the heat dissipation air duct inside the frequency converter control cabinet from blowing the dust in the dust collection box toward the heat dissipation structure. Attached Figure Description

[0017] The preferred embodiments of this utility model are described below with reference to the accompanying drawings, in which:

[0018] Figure 1 This is a schematic diagram of an embodiment of an explosion-proof frequency converter according to the present invention;

[0019] Figure 2 This is a cross-sectional view of the heat dissipation mechanism and dust removal structure in an explosion-proof frequency converter according to this utility model;

[0020] Figure 3 yes Figure 2 Enlarged diagram of point A in the middle.

[0021] List of reference numerals in the attached drawings: 1. Inverter body; 2. Heat dissipation structure; 21. Mounting frame; 22. Heat sink; 3. Dust removal structure; 31. Air knife structure; 311. Clearance groove; 312. Air inlet; 313. Exhaust outlet; 314. Ventilation groove; 315. Compression groove; 316. First side wall; 317. Second side wall; 32. Dust collection box; 321. Base plate; 322. Enclosure frame; 323. Filter screen; 324. Threaded column; 325. Guide column. Detailed Implementation

[0022] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0023] It should be noted that in the description of this utility model, the terms "upper," "lower," "left," "right," "inner," and "outer," which indicate directional or positional relationships, are based on the directional or positional relationships shown in the accompanying drawings. These are merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "setting," and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection, an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] To improve or solve the technical problem of dust accumulation on the heat dissipation structure and affecting heat dissipation performance in existing technologies, this utility model provides an explosion-proof frequency converter. The explosion-proof frequency converter includes: a frequency converter body 1; a heat dissipation structure 2, installed on the back of the frequency converter body 1 and adapted to be connected to a frequency converter cabinet; the heat dissipation structure 2 includes multiple heat sinks 22 arranged side-by-side; a dust removal structure 3, including an air knife structure 31 installed on the top of the heat dissipation structure 2 and a dust collection box 32 installed at the bottom of the heat dissipation structure 2; the air knife structure 31 has an air inlet 312 connected to external compressed gas and an exhaust port 313 communicating with the air inlet 312 and extending along the outer wall of the heat sink 22.

[0026] Figure 1 This is a schematic diagram of an embodiment of an explosion-proof frequency converter according to this utility model. Figure 1 As shown, in one or more embodiments, the explosion-proof frequency converter of this utility model includes a frequency converter body 1, a heat dissipation structure 2, and a dust removal structure 3.

[0027] See also Figure 1 The heat dissipation structure 2 is installed on the back of the inverter body 1. In one or more embodiments, the heat dissipation structure 2 is fixedly connected to the inverter body 1 via a snap-fit ​​structure, and mounting holes are provided on the heat dissipation structure 2 to connect it to the frequency converter control cabinet. For example, the side of the heat dissipation structure 2 away from the inverter body 1 is connected to the back panel, rear door, or air guide plate of the frequency converter control cabinet, allowing airflow within the frequency converter control cabinet to flow through the heat dissipation structure 2 to dissipate heat from the inverter body 1. Specifically, the heat dissipation structure 2 includes a mounting frame 21 and heat sinks 22 mounted on the mounting frame 21. The mounting frame 21 includes a bottom wall, a left side wall, and a right side wall. The bottom wall is fitted to the inverter body 1. Snap-fit ​​grooves are formed on the left and right side walls, forming a snap-fit ​​connection with snap-fit ​​blocks on the inverter body 1. Simultaneously, mounting holes are arranged on the side of the left and right side walls away from the inverter body 1. Furthermore, the heat sinks 22 extend vertically and are arranged in parallel horizontally. Airflow channels are formed between adjacent heat sinks 22 and between heat sinks 22 and the left and right sidewalls. Airflow flows through the airflow channels, thereby carrying away the heat from the heat sinks 22. Specifically, the heat sinks 22 extend outward from the bottom wall and gradually narrow in thickness; the end closest to the bottom wall is the thickest, and the end furthest from the bottom wall is the thinnest.

[0028] Figure 2 This is a cross-sectional view of the heat dissipation mechanism and dust removal structure in an explosion-proof frequency converter according to this utility model. Figure 3 yes Figure 2 An enlarged view of point A in the middle. (See diagram below.) Figure 1 , Figure 2 and Figure 3 As shown, the dust removal structure 3 includes an air knife structure 31 installed on top of the heat dissipation structure 2 and a dust collection box 32 installed at the bottom of the heat dissipation structure 2. Specifically, the air knife structure 31 is detachably installed on top of the heat dissipation structure 2 by bolts. Alternatively, the air knife structure 31 can be installed on top of the heat dissipation structure 2 by a snap-fit ​​structure. Further, the air knife structure 31 is generally rectangular, and a clearance groove 311 is formed on the air knife structure 31. The clearance groove 311 matches the shape of the air duct of the heat dissipation structure 2, thereby facilitating the upward flow of airflow through the air duct and the clearance groove 311. An air inlet 312 connected to compressed gas and an exhaust port 313 communicating with the air inlet 312 are formed on the air knife structure 31. Specifically, multiple air inlets 312 are arranged side by side in the left-right direction. The exhaust port 313 extends along the outer wall of the heat sink 22 for cleaning the outer wall of the heat sink 22. For example, the leftmost exhaust port 313 is attached to the left side wall of the heat dissipation structure 2, enabling it to clean the left side wall of the heat dissipation structure 2; this exhaust port 313 corresponds to one air inlet 312. The rightmost exhaust port 313 is attached to the right side wall of the heat dissipation structure 2, enabling it to clean the right side wall of the heat dissipation structure 2; this exhaust port 313 corresponds to one air inlet 312. The middle exhaust ports 313 are grouped in pairs, each cleaning the left and right side walls of a heat sink 22; one group of exhaust ports 313 corresponds to one air inlet 312.

[0029] Continue to participate Figure 1 , Figure 2 and Figure 3 In one or more embodiments, a ventilation slot 314 extending along the length of the heat sink 22 and a compression slot 315 communicating with the ventilation slot 314 are provided inside the air knife structure 31. The ventilation slot 314 communicates with the air inlet 312, and compressed air enters the ventilation slot 314 through the air inlet 312. The compression slot 315 has a large end and a small end, with the large end communicating with the ventilation slot 314 and the small end connected to the exhaust port 313, thereby compressing the compressed gas in the ventilation slot 314 into the shape of an air knife. Furthermore, the exhaust port 313 has a first sidewall 316 and a second sidewall 317, with the first sidewall 316 on the same plane as the outer wall of the heat sink 22, and the second sidewall 317 extending slightly into the air duct, thereby facilitating the cleaning of the outer wall of the heat sink 22.

[0030] Continue to participate Figure 1 and Figure 2In one or more embodiments, the dust collection box 32 is slidably installed below the heat dissipation structure 2 and the inverter body 1. Specifically, the dust collection box 32 includes a base plate 321 and a frame 322 mounted on the base plate 321. A through hole is provided on the base plate 321, and a filter screen 323 is arranged at the through hole. The filter screen 323 is made of cloth and can filter dust while allowing air to pass through. Further, a first mounting plate is fixed below the heat dissipation structure 2, and a drive motor is mounted on the first mounting plate. The motor drive of the drive motor is connected to a threaded post 324. A second mounting plate is provided below the inverter body 1, and the end of the threaded post 324 away from the drive motor is rotatably connected to the second mounting plate. Specifically, the second mounting plate is fixedly connected to the inverter body 1 by bolts. A threaded plate is provided on the dust collection box 32, which is threadedly connected to the threaded post 324. When the threaded post 324 rotates, it drives the dust collection box 32 to move along the length of the threaded post 324 to below the inverter body 1 or below the heat dissipation structure 2. When cleaning of the ash collection box 32 is required, the second mounting plate can be removed, and the ash collection box 32 can then be taken off. Furthermore, a guide post 325 is provided between the first and second mounting plates, and a guide hole matching the guide post 325 is provided on the ash collection box 32. Specifically, two guide posts 325 are provided, respectively arranged on both sides of the threaded post 324, for guiding and supporting the ash collection box 32. Furthermore, recessed grooves are formed in both the first mounting plate and the surrounding frame 322, and the drive motor is arranged in the recessed groove.

[0031] The technical solution of this utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will all fall within the protection scope of this utility model.

Claims

1. An explosion-proof frequency converter, characterized in that, include: Inverter body (1); A heat dissipation structure (2) is installed on the back of the inverter body (1) and is adapted to be connected to the inverter cabinet; the heat dissipation structure (2) includes a plurality of heat sinks (22) arranged side by side; The dust removal structure (3) includes a wind knife structure (31) installed on the top of the heat dissipation structure (2) and a dust collection box (32) installed at the bottom of the heat dissipation structure (2); the wind knife structure (31) has an air inlet (312) connected to the external compressed gas and an exhaust port (313) connected to the air inlet (312) and extending along the outer wall of the heat dissipation fin (22).

2. The explosion-proof frequency converter according to claim 1, characterized in that, The exhaust port (313) has a first sidewall (316) and a second sidewall (317) opposite to each other, the first sidewall (316) being on the same plane as the outer wall of the heat sink (22).

3. The explosion-proof frequency converter according to claim 1, characterized in that, A ventilation slot (314) extending along the length of the heat sink (22) and a compression slot (315) communicating with the ventilation slot (314) are provided in the air knife structure (31); the air inlet (312) is communicating with the ventilation slot (314), and the compression slot (315) is communicating with the exhaust port (313).

4. The explosion-proof frequency converter according to claim 1, characterized in that, The air knife structure (31) and the heat dissipation structure (2) are detachably fixedly connected by bolts.

5. The explosion-proof frequency converter according to claim 1, characterized in that, A through hole is provided on the bottom plate (321) of the dust collection box (32) facing away from the heat dissipation structure (2), and a filter screen (323) is arranged at the through hole.

6. The explosion-proof frequency converter according to claim 1, characterized in that, The dust collection box (32) is slidably installed below the heat dissipation structure (2) and the inverter body (1).

7. The explosion-proof frequency converter according to claim 6, characterized in that, A first mounting plate is fixed below the heat dissipation structure (2), and a drive motor is mounted on the first mounting plate. The drive motor is connected to a threaded post (324) that forms a threaded connection with the dust collection box (32). A second mounting plate is mounted below the inverter body (1), and the end of the threaded post (324) away from the drive motor is rotatably mounted on the second mounting plate.

8. The explosion-proof frequency converter according to claim 7, characterized in that, A guide post (325) is provided between the first mounting plate and the second mounting plate, and a guide hole matching the guide post (325) is provided on the ash collection box (32).

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