IGBT four-quadrant rectification module frequency conversion cabinet

Abstract

The utility model relates to the technical field of frequency conversion cabinets, and discloses an IGBT four-quadrant rectification module frequency conversion cabinet, which comprises a frequency conversion cabinet body, two dehumidification mechanisms are arranged in the frequency conversion cabinet body, and through the arranged dehumidification mechanisms, drying agent particles in dehumidification boxes absorb moisture in the frequency conversion cabinet body through a protective net, so that the moisture in the frequency conversion cabinet body can be removed. When a user opens the cabinet door to overhaul the four-quadrant rectification module body, the cabinet door drives the transmission strip to enable the transmission wheel to rotate, the transmission wheel enables the transmission block to transmit through the multiple connecting rods, the transmission block drives the transmission rod to rotate, and the transmission rod drives the stirring blades to stir drying agent particles in the dehumidification box. On one hand, the drying agent particles which are not saturated by absorption can be turned to the surface to absorb moisture, so that the overall utilization rate of the drying agent particles is improved, on the other hand, the drying agent particles are stirred by the stirring blades to reduce caking of the drying agent particles, and the service life of the drying agent particles is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of frequency conversion cabinets, in particular to an IGBT four-quadrant rectifier module frequency conversion cabinet. Background Art

[0002] An IGBT four-quadrant rectifier module frequency conversion cabinet is a power electronic device that combines a four-quadrant rectifier and variable frequency speed regulation technology for the speed regulation and control of AC motors. IGBT (Insulated Gate Bipolar Transistor) is a commonly used power semiconductor device in such devices and is favored for its high efficiency, high power density, and good switching characteristics.

[0003] According to the Chinese patent authorization announcement: CN218829586U, a disclosed frequency conversion cabinet includes a frequency conversion cabinet. A cavity is provided on the frequency conversion cabinet. Partition plates are vertically and spacedly installed in the cavity of the frequency conversion cabinet. A wiring board is inserted on the partition plate. A plurality of wire grooves are provided on the wiring board. An inlet is provided on the wiring board and is communicated with the wire grooves. A wiring arrangement board covers the wire grooves. The frequency conversion cabinet described in this utility model is convenient for people to reasonably arrange wires and convenient for people to check and repair later. However, there are still some problems in the use of this frequency conversion cabinet. In actual use, to ensure the heat dissipation performance of the frequency conversion cabinet, special heat dissipation holes are usually provided on both sides of the cabinet body in its actual design. However, in an environment with relatively high humidity, external moisture may penetrate into the cabinet through these heat dissipation holes. In this case, once the moisture invades, it may cause a short circuit problem of the electrical components in the cabinet, thereby affecting the normal operation and safety of the equipment. Summary of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the utility model provides an IGBT four-quadrant rectifier module frequency conversion cabinet, which solves the problem that in an environment with relatively high humidity, external moisture may penetrate into the cabinet through these heat dissipation holes, and in this case, once the moisture invades, it may cause a short circuit problem of the electrical components in the cabinet.

[0005] To achieve the above objectives, the present utility model is realized through the following technical solutions: An IGBT four-quadrant rectification module frequency conversion cabinet, including a frequency conversion cabinet body, wherein two dehumidification mechanisms are provided inside the frequency conversion cabinet body. The dehumidification mechanism includes a transmission strip, a transmission wheel, a connecting rod, a transmission block, desiccant particles, a transmission rod, a dehumidification box, a protective net, and a stirring blade. A plurality of protective nets are fixedly connected to the side walls of the two dehumidification boxes. Covers are snap-connected to the tops of the two dehumidification boxes. Desiccant particles are laid inside the two dehumidification boxes. Stirring blades are rotatably connected to the inner walls of the two dehumidification boxes. Transmission rods are fixedly connected to the tops of the two stirring blades. Transmission wheels are provided on the tops of the two covers. A plurality of connecting rods are fixedly connected to the inner walls of the two transmission wheels. Transmission strips are provided on one side of the two transmission wheels. A four-quadrant rectification module body is arranged inside the frequency conversion cabinet body;

[0006] An energy-saving heat dissipation mechanism is provided on the back of the frequency conversion cabinet body. The energy-saving heat dissipation mechanism includes a temperature control switch, a mounting frame, a heat dissipation fan, heat dissipation fins, and a heat conduction plate. A plurality of heat dissipation fans are fixedly connected to the inner walls of the two mounting frames. A heat conduction plate is fixedly connected between the two mounting frames. The front surface of the heat conduction plate is fixedly embedded in the inner wall of the back of the frequency conversion cabinet body. A plurality of heat dissipation fins are fixedly connected to the outside of the heat conduction plate. A temperature control switch is arranged on one side of the back of the frequency conversion cabinet body. The temperature control switch is electrically connected to the plurality of heat dissipation fans.

[0007] Preferably, two cabinet doors are slidably connected to the front surface of the frequency conversion cabinet body. The two transmission strips are respectively fixedly connected to the backs of the two cabinet doors.

[0008] Preferably, a control module is arranged at the bottom of the four-quadrant rectification module body.

[0009] Preferably, a drive module is arranged on one side of the control module. The control module and the drive module are both electrically connected to the four-quadrant rectification module body.

[0010] Preferably, the bottoms of the two dehumidification boxes are snap-connected to the inner wall of the bottom end of the frequency conversion cabinet body. The tops of the two transmission rods respectively penetrate through the two covers.

[0011] Preferably, one ends of the plurality of connecting rods are respectively fixedly connected to two transmission blocks. The bottoms of the two transmission blocks are respectively fixedly connected to the tops of the two transmission rods.

[0012] Preferably, the two mounting frames are both fixedly connected to the back of the frequency conversion cabinet body. The inner side of the heat conduction plate is attached to the back of the four-quadrant rectification module body.

[0013] Preferably, both ends of the plurality of heat dissipation fins are respectively placed between the plurality of heat dissipation fans. The detection end of the temperature control switch is arranged inside the frequency conversion cabinet body. Beneficial effects

[0014] The utility model provides a frequency conversion cabinet for an IGBT four - quadrant rectifier module. Compared with the prior art, it has the following beneficial effects:

[0015] In the utility model, through the arranged dehumidification mechanism, the desiccant particles inside the dehumidification box absorb the moisture inside the frequency conversion cabinet body through the protective net. When the user opens the cabinet door to repair the four - quadrant rectifier module body, the cabinet door drives the transmission strip to make the transmission wheel rotate. The transmission wheel drives the transmission block to move through multiple connecting rods, and the transmission block drives the transmission rod to rotate. The transmission rod drives the stirring blade to stir the desiccant particles inside the dehumidification box. On the one hand, the unsaturated desiccant particles can be turned to the surface to absorb moisture, thereby improving the overall utilization rate of the desiccant particles. On the other hand, the stirring blade stirring the desiccant particles can reduce the caking of the desiccant particles and improve the service life of the desiccant particles.

[0016] 2. In the utility model, through the arranged energy - saving heat dissipation mechanism, the temperature generated when the four - quadrant rectifier module body works is transmitted to the heat conducting plate. The heat conducting plate evenly transmits the temperature to multiple heat dissipation fins, and the multiple heat dissipation fins transmit the temperature to the surrounding air. When the detection end of the temperature control switch detects that the temperature inside the frequency conversion cabinet body reaches the temperature threshold set by the temperature control switch, the temperature control switch starts multiple heat dissipation fans. The multiple heat dissipation fans can accelerate the air flow around the heat dissipation fins, further promoting heat dissipation, effectively reducing the temperature inside the frequency conversion cabinet body, ensuring the stable operation and safety of the equipment, and saving the electric energy required by the frequency conversion cabinet body. Description of the drawings

[0017] Figure 1 is a three - dimensional structure schematic diagram of a frequency conversion cabinet for an IGBT four - quadrant rectifier module proposed by the utility model;

[0018] Figure 2 is a back - side structure solid diagram of a frequency conversion cabinet for an IGBT four - quadrant rectifier module proposed by the utility model;

[0019] Figure 3 is a Figure 2 magnified view of part A in a frequency conversion cabinet for an IGBT four - quadrant rectifier module proposed by the utility model;

[0020] Figure 4 is a structural decomposition diagram of the dehumidification mechanism part of a frequency conversion cabinet for an IGBT four - quadrant rectifier module proposed by the utility model.

[0021] Legend description:

[0022] 1. Variable frequency cabinet body; 2. Cabinet door; 3. Four-quadrant rectifier module body; 4. Dehumidification mechanism; 401. Transmission bar; 402. Transmission wheel; 403. Connecting rod; 404. Transmission block; 405. Desiccant particles; 406. Transmission rod; 407. Protective net; 408. Stirring blade; 409. Cover plate; 410. Dehumidification box; 5. Energy-saving heat dissipation mechanism; 501. Temperature control switch; 502. Installation frame; 503. Cooling fan; 504. Heat dissipation fins; 505. Heat conduction plate; 6. Control module; 7. Drive module. Detailed implementation manners

[0023] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0024] Please refer to Figure 1 - Figure 4 , the present invention provides two technical solutions, specifically including the following embodiments: Embodiment

[0025] An IGBT four - quadrant rectifier module frequency conversion cabinet, including a frequency conversion cabinet body 1. There are two dehumidification mechanisms 4 inside the frequency conversion cabinet body 1. The dehumidification mechanism 4 includes a transmission strip 401, a transmission wheel 402, a connecting rod 403, a transmission block 404, desiccant particles 405, a transmission rod 406, a dehumidification box 410, a protective net 407 and a stirring blade 408. A plurality of protective nets 407 are fixedly connected to the side walls of the two dehumidification boxes 410. The pore size of the protective net 407 is smaller than the size of the desiccant particles 405. The tops of the two dehumidification boxes 410 are snap - connected with cover plates 409. Desiccant particles 405 are laid inside the two dehumidification boxes 410. Stirring blades 408 are rotatably connected to the inner walls of the two dehumidification boxes 410. Transmission rods 406 are fixedly connected to the tops of the two stirring blades 408. Transmission wheels 402 are arranged on the tops of the two cover plates 409. A plurality of connecting rods 403 are fixedly connected to the inner walls of the two transmission wheels 402. Transmission strips 401 are arranged on one side of the two transmission wheels 402. A four - quadrant rectifier module body 3 is arranged inside the frequency conversion cabinet body 1. Two cabinet doors 2 are slidably connected to the front of the frequency conversion cabinet body 1. The two transmission strips 401 are respectively fixedly connected to the backs of the two cabinet doors 2. A control module 6 is arranged at the bottom of the four - quadrant rectifier module body 3. A drive module 7 is arranged on one side of the control module 6. The control module 6 and the drive module 7 are both electrically connected to the four - quadrant rectifier module body 3. The bottoms of the two dehumidification boxes 410 are snap - connected to the inner walls of the bottom of the frequency conversion cabinet body 1. The tops of the two transmission rods 406 respectively penetrate through the two cover plates 409. One ends of the plurality of connecting rods 403 are respectively fixedly connected to two transmission blocks 404. The bottoms of the two transmission blocks 404 are respectively fixedly connected to the tops of the two transmission rods 406. It should be noted that the four - quadrant rectifier module body 3 is an IGBT four - quadrant rectifier module. Its working principle is that in the four - quadrant rectifier module body 3, IGBT and diodes work together to convert alternating current into direct current. The direct - current voltage is smoothed by a capacitor to reduce voltage fluctuations and ripples. The control module 6 adjusts the switching frequency and duty cycle of the four - quadrant rectifier module body 3 according to the input command signal and feedback signal, so as to control the voltage and current output to the AC motor and achieve precise speed control of the motor. The above - mentioned relevant four - quadrant rectifier module bodies 3 all refer to existing technologies.

[0026] During operation, the desiccant particles 405 inside the dehumidification box 410 absorb the moisture inside the variable frequency cabinet body 1 through the protective net 407. When the user opens the cabinet door 2 to repair the four-quadrant rectifier module body 3, the cabinet door 2 drives the transmission bar 401 to rotate the transmission wheel 402. The transmission wheel 402 drives the transmission block 404 through a plurality of connecting rods 403. The transmission block 404 drives the transmission rod 406 to rotate, and the transmission rod 406 drives the stirring blade 408 to stir the desiccant particles 405 inside the dehumidification box 410. On the one hand, the unsaturated desiccant particles 405 can be turned to the surface to absorb moisture, thereby improving the overall utilization rate of the desiccant particles 405. On the other hand, the stirring blade 408 stirring the desiccant particles 405 can reduce the caking of the desiccant particles 405 and improve the service life of the desiccant particles 405. Embodiment

[0027] On the basis of Embodiment 1, an energy-saving heat dissipation mechanism 5 is provided on the back of the variable frequency cabinet body 1. The energy-saving heat dissipation mechanism 5 includes a temperature control switch 501, mounting frames 502, cooling fans 503, heat dissipation fins 504 and a heat conduction plate 505. A plurality of cooling fans 503 are fixedly connected to the inner walls of the two mounting frames 502. A heat conduction plate 505 is fixedly connected between the two mounting frames 502. The front surface of the heat conduction plate 505 is fixedly embedded in the inner wall of the back of the variable frequency cabinet body 1. A plurality of heat dissipation fins 504 are fixedly connected to the outside of the heat conduction plate 505. A temperature control switch 501 is arranged on one side of the back of the variable frequency cabinet body 1. The temperature control switch 501 is electrically connected to the plurality of cooling fans 503. The two mounting frames 502 are both fixedly connected to the back of the variable frequency cabinet body 1. The inner side of the heat conduction plate 505 is attached to the back of the four-quadrant rectifier module body 3. The two ends of the plurality of heat dissipation fins 504 are respectively placed between the plurality of cooling fans 503. The detection end of the temperature control switch 501 is arranged inside the variable frequency cabinet body 1. The specific model of the temperature control switch 501 is Honeywell RT8000. The temperature threshold set by the temperature control switch 501 is 45 degrees. When the temperature inside the variable frequency cabinet body 1 exceeds 45 degrees, the temperature control switch 501 starts the plurality of cooling fans 503. When the temperature inside the variable frequency cabinet body 1 is lower than 45 degrees, the temperature control switch 501 turns off the plurality of cooling fans 503.

[0028] When the temperature generated by the four - quadrant rectifier module body 3 during operation is transmitted to the heat - conducting plate 505, the heat - conducting plate 505 evenly transmits the temperature to a plurality of heat - dissipating fins 504, and the plurality of heat - dissipating fins 504 then transmit the temperature to the surrounding air. When the detection end of the temperature - control switch 501 detects that the temperature inside the variable - frequency cabinet body 1 reaches the temperature threshold set by the temperature - control switch 501, the temperature - control switch 501 activates a plurality of cooling fans 503. The plurality of cooling fans 503 can accelerate the air flow around the heat - dissipating fins 504, further promoting heat dissipation, effectively reducing the temperature inside the variable - frequency cabinet body 1, ensuring the stable operation and safety of the equipment, and saving the electric energy required by the variable - frequency cabinet body 1.

[0029] The above - mentioned are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the application shall be included within the protection scope of the present application.

Claims

1. An IGBT four-quadrant rectifier module frequency conversion cabinet, comprising a frequency conversion cabinet body (1), characterized in that: Two dehumidification mechanisms (4) are arranged inside the frequency conversion cabinet body (1), and the dehumidification mechanisms (4) include a transmission bar (401), a transmission wheel (402), a connecting rod (403), a transmission block (404), desiccant particles (405), a transmission rod (406), a dehumidification box (410), a protective net (407) and a stirring blade (408). The side walls of the two dehumidification boxes (410) are fixedly connected with a plurality of protective nets (407). The top ends of the two dehumidification boxes (410) are snap-fitted with a cover plate (409). The two dehumidification boxes (410) are The interior of the two dehumidification boxes (410) is paved with desiccant particles (405), the inner walls of the two dehumidification boxes (410) are rotatably connected to stirring blades (408), the tops of the two stirring blades (408) are fixedly connected to transmission rods (406), the tops of the two cover plates (409) are provided with transmission wheels (402), the inner walls of the two transmission wheels (402) are fixedly connected to a plurality of connecting rods (403), one side of the two transmission wheels (402) is provided with a transmission bar (401), and a four-quadrant rectifier module body (3) is arranged inside the frequency conversion cabinet body (1); An energy-saving heat dissipation mechanism (5) is provided on the back of the frequency conversion cabinet body (1), and the energy-saving heat dissipation mechanism (5) comprises a temperature control switch (501), a mounting frame (502), a heat dissipation fan (503), heat dissipation fins (504) and a heat conduction plate (505). The inner walls of the two mounting frames (502) are fixedly connected with a plurality of heat dissipation fans (503), a heat conduction plate (505) is fixedly connected between the two mounting frames (502), the front side of the heat conduction plate (505) is fixedly embedded in the inner wall of the back of the frequency conversion cabinet body (1), and the outer side of the heat conduction plate (505) is fixedly connected with a plurality of heat dissipation fins (504), and a temperature control switch (501) is provided on one side of the back of the frequency conversion cabinet body (1), and the temperature control switch (501) is electrically connected to the plurality of heat dissipation fans (503).

2. The IGBT four-quadrant rectifier module frequency conversion cabinet according to claim 1, characterized in that: The front side of the frequency conversion cabinet body (1) is slidably connected to two cabinet doors (2), and the two transmission bars (401) are respectively fixedly connected to the back sides of the two cabinet doors (2).

3. The IGBT four-quadrant rectifier module frequency conversion cabinet according to claim 1, characterized in that: A control module (6) is provided at the bottom of the four-quadrant rectifier module body (3).

4. The IGBT four-quadrant rectifier module frequency conversion cabinet according to claim 3, characterized in that: A drive module (7) is provided on one side of the control module (6), and both the control module (6) and the drive module (7) are electrically connected to the four-quadrant rectifier module body (3).

5. The IGBT four-quadrant rectifier module frequency conversion cabinet according to claim 2, characterized in that: The bottom ends of the two dehumidification boxes (410) are both snap-connected to the inner wall of the bottom end of the frequency conversion cabinet body (1), and the top ends of the two transmission rods (406) respectively penetrate the two cover plates (409).

6. The IGBT four-quadrant rectifier module frequency conversion cabinet according to claim 1, characterized in that: One end of the plurality of connecting rods (403) is respectively fixedly connected to two transmission blocks (404), and the bottom ends of the two transmission blocks (404) are respectively fixedly connected to the top ends of the two transmission rods (406).

7. The IGBT four-quadrant rectifier module frequency conversion cabinet according to claim 1, characterized in that: The two installation frames (502) are both fixedly connected to the back side of the frequency conversion cabinet body (1), and the inner side of the heat conduction plate (505) is attached to the back side of the four-quadrant rectifier module body (3).

8. The IGBT four-quadrant rectifier module frequency conversion cabinet according to claim 1, characterized in that: Two ends of the plurality of heat dissipation fins (504) are respectively placed between the plurality of heat dissipation fans (503), and a detection end of the temperature control switch (501) is arranged inside the frequency conversion cabinet body (1).

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