A frequency converter

Abstract

This utility model relates to the field of conversion device technology, specifically to a frequency converter, including a frequency converter body and a drying assembly. The drying assembly includes a side cover, a filter screen, a housing, a desiccant, an elastic telescopic rod, and a shielding frame. The side cover is fixedly connected to the frequency converter body, the filter screen is fixedly installed inside the side cover, the housing is slidably connected to the side cover, and the housing is located inside the side cover. The housing has a placement groove. The two ends of the elastic telescopic rod are fixedly connected to the housing and the side cover, respectively. One end of the shielding frame is rotatably connected to the side cover, and the other end of the shielding frame is detachably connected to the side cover. The shielding frame is located on the top of the side cover. The desiccant is detachably connected to the housing and is located inside the housing. When the desiccant needs to be replaced after prolonged use, the shielding frame can be rotated to open the top of the side cover. At this time, the housing moves out of the side cover under the action of the elastic telescopic rod, thereby exposing the desiccant for easy replacement.

Description

Technical Field

[0001] This utility model relates to the field of conversion device technology, and in particular to a frequency converter. Background Technology

[0002] Vector inverter technology decomposes the motor current into D-axis current and Q-axis current, where the D-axis current is the excitation current and the Q-axis current is the torque current. This allows for separate control of the excitation and torque currents of an AC motor, giving it control characteristics similar to a DC motor and improving its overall control performance. Existing vector inverters often have waterproof gaskets at the openings of the casing to prevent moisture from seeping into the interior. However, this moisture-proofing measure is not comprehensive enough to remove moisture from the air blown into the casing. In humid environments, the high moisture content in the air reduces the lifespan of internal components.

[0003] The utility model patent with publication number CN215582027U provides a moisture-proof and sealed vector frequency converter. The air drawn in by the cooling fan is first filtered by the desiccant in the enclosure, which absorbs most of the moisture in the air. As the outside air seeps into the inside of the frequency converter body through the second filter and the threaded cover, most of the moisture in the air is also absorbed by the desiccant in the threaded cover. This makes the air entering the inside of the frequency converter body relatively dry, which helps to reduce the impact of moisture on the internal structure of the frequency converter body and helps to extend the service life of the frequency converter body.

[0004] The above solution uses a desiccant inside the enclosure to absorb moisture from the air, making the air entering the inverter relatively dry. However, replacing the desiccant is inconvenient and affects its use. Utility Model Content

[0005] The purpose of this invention is to provide a frequency converter that solves the problem of inconvenient desiccant replacement affecting its use.

[0006] To achieve the above objectives, this utility model provides a frequency converter, including a frequency converter body and a drying assembly; the drying assembly includes a side cover, a filter, a housing, a desiccant, an elastic telescopic rod, and a shielding frame. The side cover is fixedly connected to the frequency converter body and is located outside the frequency converter body. The filter is fixedly installed inside the side cover. The housing is slidably connected to the side cover and is located inside the side cover. The housing has a placement groove. Both ends of the elastic telescopic rod are fixedly connected to the housing and the side cover, respectively, and the elastic telescopic rod is located inside the placement groove. One end of the shielding frame is rotatably connected to the side cover, and the other end of the shielding frame is detachably connected to the side cover. The shielding frame is located on top of the side cover. The desiccant is detachably connected to the housing and is located inside the housing.

[0007] The elastic telescopic rod includes an outer cylinder, a first spring, and an inner cylinder. One end of the outer cylinder is fixedly connected to the side cover, and the other end of the outer cylinder is slidably connected to one end of the inner cylinder. The other end of the inner cylinder is fixedly connected to the insert cover. The two ends of the first spring are fixedly connected to the inner cylinder and the outer cylinder, respectively, and the first spring is located inside the outer cylinder.

[0008] The outer side of the cover is provided with a limiting bracket, and the inner side of the side cover has a limiting groove adapted to the limiting bracket, with the limiting bracket located inside the limiting groove.

[0009] The shield is provided with a positioning block, and the side cover has a positioning groove that is adapted to the positioning block. The positioning block is located inside the positioning groove.

[0010] The drying assembly further includes a locking nut, the positioning block has a bayonet, the locking nut is threadedly connected to the side cover, and one end of the locking nut is located inside the bayonet.

[0011] This utility model discloses a frequency converter in which air is first filtered by the filter screen and then dried by the desiccant, thereby reducing the moisture content in the air and extending the service life of the frequency converter body. When the desiccant needs to be replaced after prolonged use, the shield can be rotated to open the top of the side cover. At this time, the insert is moved out of the side cover under the action of the elastic telescopic rod, thus exposing the desiccant for easy replacement, solving the problem of inconvenient desiccant replacement affecting use. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0013] Figure 1 This is a schematic diagram of the structure of a frequency converter according to this utility model.

[0014] Figure 2 This is a cross-sectional view of the inverter of this utility model.

[0015] Figure 3 This is a cross-sectional view of the internal structure of the side cover of a frequency converter according to this utility model.

[0016] 100-Inverter body, 210-Side cover, 211-Limiting groove, 212-Positioning groove, 220-Filter screen, 230-Inset cover, 231-Placement groove, 232-Limiting bracket, 240-Desiccant, 250-Shielding bracket, 251-Positioning block, 252-Bayonet, 261-Outer cylinder, 262-First spring, 263-Inner cylinder, 270-Locking nut. Detailed Implementation

[0017] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0018] Please see Figures 1 to 3 , Figure 1 This is a structural schematic diagram of a frequency converter according to this utility model. Figure 2 This is a cross-sectional view of the inverter according to this utility model. Figure 3 This is a cross-sectional view of the internal structure of the side cover of a frequency converter according to this utility model.

[0019] This utility model provides a frequency converter, including a frequency converter body 100 and a drying assembly. The drying assembly includes a side cover 210, a filter screen 220, a cover 230, a desiccant 240, an elastic telescopic rod, a shielding frame 250, and a locking nut 270. The elastic telescopic rod includes an outer cylinder 261, a first spring 262, and an inner cylinder 263.

[0020] In this specific embodiment, the side cover 210 is fixedly connected to the inverter body 100, and the side cover 210 is located outside the inverter body 100. The filter screen 220 is fixedly installed inside the side cover 210. The insert cover 230 is slidably connected to the side cover 210, and the insert cover 230 is located inside the side cover 210. The insert cover 230 has a placement groove 231. The two ends of the elastic telescopic rod are fixedly connected to the insert cover 230 and the side cover 210 respectively. The elastic telescopic rod is located inside the placement groove 231. One end of the shielding frame 250 is rotatably connected to the side cover 210, and the other end of the shielding frame 250 is detachably connected to the side cover 210. The shielding frame 250 is located on top of the side cover 210. The desiccant 240 is detachably connected to the insert cover 230, and the desiccant 240 is located inside the insert cover 230. The side cover 210 is connected to the inverter body 100. The filter 220 is used to filter impurities in the air. The desiccant 240 is installed inside the cover 230. The shielding bracket 250 is used to shield the top of the side cover 210. The elastic telescopic rod is elastic enough to push the cover 230 out from inside the side cover 210. In use, the air is first filtered by the filter 220 and then dried by the desiccant 240, thereby reducing the moisture in the air and helping to extend the service life of the inverter body. When the desiccant 240 needs to be replaced after prolonged use, the shielding bracket 250 can be rotated to open the top of the side cover 210. At this time, the cover 230 moves out of the side cover 210 under the action of the elastic telescopic rod, thereby exposing the desiccant 240 for easy replacement, solving the problem that the inconvenience of replacing the desiccant 240 affects its use.

[0021] Furthermore, one end of the outer cylinder 261 is fixedly connected to the side cover 210, and the other end of the outer cylinder 261 is slidably connected to one end of the inner cylinder 263. The other end of the inner cylinder 263 is fixedly connected to the insert cover 230. The two ends of the first spring 262 are fixedly connected to the inner cylinder 263 and the outer cylinder 261 respectively, and the first spring 262 is located inside the outer cylinder 261. The inner cylinder 263 can slide relative to the outer cylinder 261. The first spring 262 holds the inner cylinder 263 upward. When the shielding frame 250 opens the top of the side cover 210, the first spring 262 holds the inner cylinder 263 upward, causing the inner cylinder 263 to push the insert cover 230 upward, so as to push the insert cover 230 out of the side cover 210, so as to facilitate the replacement of the desiccant 240.

[0022] Specifically, a limiting bracket 232 is provided on the outer side of the cover 230, and a limiting groove 211 adapted to the limiting bracket 232 is provided on the inner side of the side cover 210. The limiting bracket 232 is located inside the limiting groove 211. The limiting bracket 232 can slide inside the limiting groove 211, and the limiting bracket 232 and the limiting groove 211 cooperate with each other to limit the range of motion of the cover 230.

[0023] The shielding frame 250 is provided with a positioning block 251, and the side cover 210 has a positioning groove 212 adapted to the positioning block 251, with the positioning block 251 located inside the positioning groove 212. When fixing the shielding frame 250 to the side cover 210, the positioning block 251 is inserted into the positioning groove 212 to facilitate fixing the shielding frame 250.

[0024] Additionally, the positioning block 251 has a bayonet 252, and the locking nut 270 is threadedly connected to the side cover 210, with one end of the locking nut 270 located inside the bayonet 252. The locking nut 270 can rotate relative to the side cover 210. Tightening the locking nut 270 causes one end of the locking nut 270 to enter the bayonet 252, thereby holding the positioning block 251 in place and fixing the positioning block 251 in the positioning groove 212, thus securing the shielding frame 250. When it is necessary to rotate the shielding frame 250, tightening the locking nut 270 causes its end to move out of the bayonet 252, allowing the positioning block 251 to be moved out of the positioning groove 212, thereby rotating the shielding frame 250.

[0025] When using a frequency converter, air is first filtered by the filter screen 220 and then dried by the desiccant 240, thereby reducing moisture in the air and extending the service life of the frequency converter body. When the desiccant 240 needs to be replaced after prolonged use, the locking nut 270 can be turned so that its end moves out of the latch 252, allowing the positioning block 251 to be moved out of the positioning groove 212. The shielding bracket 250 can then be rotated to open the top of the side cover 210. At this time, the insert 230 moves out of the side cover 210 under the pushing action of the inner cylinder 263, thus exposing the desiccant 240 for further cleaning. After replacement, press the insert 230 to move it into the side cover 210, rotate the shield 250 to close the top of the side cover 210, and tighten the locking nut 270 to move the end of the locking nut 270 into the bayonet 252 to hold the positioning block 251, thereby fixing the positioning block 251 in the positioning groove 212 and fixing the shield 250.

[0026] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments and equivalent changes made in accordance with the claims of this application still fall within the scope of this application.

Claims

1. A frequency converter, comprising a frequency converter body, characterized in that, It also includes a drying component; The drying assembly includes a side cover, a filter, a housing, a desiccant, a flexible telescopic rod, and a shielding frame. The side cover is fixedly connected to the inverter body and is located outside the inverter body. The filter is fixedly installed inside the side cover. The housing is slidably connected to the side cover and is located inside the side cover. The housing has a placement groove. Both ends of the flexible telescopic rod are fixedly connected to the housing and the side cover, respectively, and the flexible telescopic rod is located inside the placement groove. One end of the shielding frame is rotatably connected to the side cover, and the other end of the shielding frame is detachably connected to the side cover. The shielding frame is located on top of the side cover. The desiccant is detachably connected to the housing and is located inside the housing.

2. The frequency converter as described in claim 1, characterized in that, The elastic telescopic rod includes an outer cylinder, a first spring, and an inner cylinder. One end of the outer cylinder is fixedly connected to the side cover, and the other end of the outer cylinder is slidably connected to one end of the inner cylinder. The other end of the inner cylinder is fixedly connected to the insert cover. The two ends of the first spring are fixedly connected to the inner cylinder and the outer cylinder, respectively, and the first spring is located inside the outer cylinder.

3. The frequency converter as described in claim 1, characterized in that, The outer side of the cover is provided with a limiting bracket, and the inner side of the side cover has a limiting groove adapted to the limiting bracket, with the limiting bracket located inside the limiting groove.

4. The frequency converter as described in claim 1, characterized in that, The shield is provided with a positioning block, and the side cover has a positioning groove that is adapted to the positioning block, with the positioning block located inside the positioning groove.

5. The frequency converter as described in claim 4, characterized in that, The drying assembly also includes a locking nut, the positioning block has a bayonet, the locking nut is threadedly connected to the side cover, and one end of the locking nut is located inside the bayonet.

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