CN113898567A

CN113898567A - Air compressor machine frequency conversion control system

Info

Publication number: CN113898567A
Application number: CN202111240847.3A
Authority: CN
Inventors: 史怀鹏
Original assignee: Xuzhou Xinxu Machinery Manufacturing Co ltd
Current assignee: Xuzhou Xinxu Machinery Manufacturing Co ltd
Priority date: 2021-10-25
Filing date: 2021-10-25
Publication date: 2022-01-07

Abstract

The invention discloses a variable frequency control system of an air compressor, in particular to the technical field of air compressors, which comprises a connecting component, wherein the connecting component comprises a cabinet body, three cabinet walls of the cabinet body are respectively provided with two groups of symmetrical first screen plates and one group of symmetrical second screen plates, the bottom end in the cabinet body is provided with a cooling component, the cooling component comprises a bottom box, the bottom box is internally and rotatably provided with a driving shaft and a first rotating shaft, the top end of the bottom box is provided with a top box, one side in the top box is rotatably provided with a driving shaft, the driving shaft is slidably provided with a moving cylinder, the other side in the top box is rotatably provided with a one-way screw rod, the one-way screw rod is provided with a moving block in a threaded manner, one side of the moving block is provided with a rotating column, one end of the rotating column is provided with a fan, the driving shaft is used for rotating the fan to cool the interior of the cabinet body, the first rotating shaft is used for rotating to drive the fan to reciprocate, so that the inside of the cabinet body can be rapidly cooled.

Description

Air compressor machine frequency conversion control system

Technical Field

The invention relates to the technical field of air compressors, in particular to a variable frequency control system of an air compressor.

Background

With the development of economy, people pay more and more attention to high-efficiency and low-consumption technology, whether a variable frequency speed regulation technology can be applied in the air supply field of an air compressor, the performance of the air compressor can be improved while electric energy is saved, and the air supply quality is improved, the variable frequency air compressor and a fan motor water pump are the same in electricity saving, the input voltage frequency is controlled according to load change, the variable frequency air compressor can keep the stability of parameters such as pressure, flow, temperature and the like, so the working performance of the compressor is greatly improved, the variable frequency air compressor can generate a large amount of heat in the operation process, therefore, a heat dissipation device is required to be configured for heat dissipation, the existing heat dissipation device is fixed on the wall of a cabinet for heat dissipation and cannot move up and down to cool down, and when the existing screen plate is used, dust easily penetrates through the screen plate to carry out the interior of the cabinet body, so that a large amount of dust falls into the interior of the cabinet body, therefore, the air compressor variable-frequency control system is provided for solving the problems.

Disclosure of Invention

The invention aims to provide a variable frequency control system of an air compressor, which aims to solve the problems in the background technology.

In order to solve the technical problems, the invention adopts the following technical scheme: a frequency conversion control system of an air compressor comprises a connecting assembly, wherein the connecting assembly comprises a cabinet body, a frequency converter unit is arranged at the center of the bottom end in the cabinet body, a tank body is connected to one side of the frequency converter unit, a cooling assembly is arranged at one side, away from the tank body, of the frequency converter unit and comprises a bottom box, four supporting plates which are distributed up and down are arranged in the bottom box, driving shafts are rotatably arranged on the four supporting plates, a first rotating shaft is rotatably arranged on the supporting plate at the bottommost layer, a sector gear is arranged at the top end of the first rotating shaft, a plurality of connecting blocks which are distributed annularly are arranged on the outer ring at the upper end of the first rotating shaft, a sector inner gear ring is arranged at one end, away from the first rotating shaft, of the plurality of connecting blocks which are distributed annularly, a third gear is arranged between the sector inner gear ring and the sector gear, and a third rotating shaft is rotatably arranged on the three supporting plates at the top layer, the utility model discloses a fan, including first axis of rotation, first gear, second gear, third axis of rotation upper end, the sixth gear meshing has the seventh gear, the top case is installed on the under casing top, top incasement portion one side is rotated and is equipped with the transmission shaft, it is equipped with a removal section of thick bamboo to slide on the transmission shaft, the side gear is installed to removal section of thick bamboo outer lane, the side gear meshing has the eighth gear, eighth gear center department installs the rotation post, the rotation post is kept away from the one end of eighth gear and is installed the fan, the inside opposite side rotation of top incasement portion is equipped with one-way screw, the screw thread is equipped with the movable block on the one-way screw.

Preferably, two first buckles which are symmetrical up and down are installed on one side of the inner portion of the cabinet body respectively, the first buckles are connected with second buckles, two sets of symmetrical screws are installed on one side, close to the first buckles, of the second buckles, the first buckles are connected with the second buckles through the screws, and the tank body is installed between the first buckles and the second buckles which are distributed up and down.

Preferably, first rectangular hole has all been seted up to two cabinet walls of cabinet body symmetry, first rectangular hole is located the cabinet wall department that is close to the jar body, first rectangular hole internally mounted has the first otter board of symmetry, the second rectangular hole has been seted up to cabinet body one side, the second rectangular hole is located the cabinet wall of keeping away from the jar body, second rectangular hole internally mounted has the second otter board of symmetry.

Preferably, a first gear is mounted on the driving shaft, a second gear is meshed with the first gear, a motor is mounted on the two supporting plates on the top layer, and the output end of the motor is fixedly connected with the center of the second gear.

Preferably, the drive wheel is installed to the drive shaft bottom, from the driving wheel is installed to first axis of rotation bottom, the belt is overlapped with from driving wheel outer lane.

Preferably, the third gear can be respectively meshed with the sector gear and the sector inner gear ring, a second rotating shaft is rotatably arranged on the two middle supporting plates, and the bottom end of the second rotating shaft is fixedly connected with the center of the top end of the third gear.

Preferably, a fourth gear is mounted on the second rotating shaft, the fourth gear is engaged with a fifth gear, and the fifth gear is mounted at the lower end of the third rotating shaft.

Preferably, the transmission shaft is provided with symmetrical limiting grooves, the movable cylinder is internally provided with symmetrical limiting blocks which can slide in the symmetrical limiting grooves, the top end of the driving shaft is fixedly connected with the bottom end of the transmission shaft, and the bottom end of the one-way screw is fixedly connected with the center of the seventh gear.

Preferably, one side of the top box is provided with a first limiting hole and a second limiting hole, one side of the moving block, which is close to the second limiting hole, is provided with symmetrical limiting columns, the outer ring of each limiting column is rotatably provided with a limiting wheel, the symmetrical limiting wheels can slide in the second limiting hole, one side of the moving block, which is far away from the second limiting hole, is provided with symmetrical connecting columns, one ends of the symmetrical connecting columns, which are far away from the moving block, are provided with an L-shaped fixing seat, and the moving cylinder is rotatably arranged on the L-shaped fixing seat.

Preferably, a fixed block is installed on one side, close to the first limiting hole, of the moving block, the rotating column is rotatably arranged on the fixed block, the rotating column can slide in the first limiting hole, and the fan is located outside the top box.

Compared with the prior art, the invention has the beneficial effects that:

1. the driving shaft and the driving wheel are driven to rotate by the rotation of the driving shaft, the driving wheel drives the driven wheel and the first rotating shaft at the center of the driven wheel to rotate by the belt, the first rotating shaft drives the sector gear and the sector inner gear ring connected with the annularly distributed connecting blocks to rotate, the sector inner gear ring and the sector gear are intermittently meshed with the third gear, so that the sector inner gear ring and the sector gear rotate to drive the third gear to rotate in a reciprocating mode, the third gear rotates to drive the second rotating shaft to rotate in a reciprocating mode, the second rotating shaft rotates to drive the third rotating shaft to rotate in a reciprocating mode, and the third rotating shaft rotates to drive the one-way screw to rotate in a reciprocating mode.

2. The movable block is driven by the reciprocating rotation of the one-way screw to reciprocate, the fan is driven by the reciprocating movement of the movable block to reciprocate, the limit block in the movable cylinder rotatably arranged in the L-shaped fixing seat slides in the limit groove in the transmission shaft, so that the movable cylinder can slide in the transmission shaft, and the movable cylinder can still be driven by the rotation of the transmission shaft to rotate after the movable cylinder moves, the transmission shaft rotates to drive the movable cylinder to rotate, the movable cylinder rotates to drive the rotating column and the fan to rotate, and therefore heat in the cabinet body is dissipated from the second screen plate.

3. According to the invention, the first screen plate and the second screen plate which are double-layered and the space formed between the first screen plate and the second screen plate are utilized to prevent dust from directly entering the cabinet body.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic front view of the present invention.

FIG. 2 is a schematic cross-sectional view of the present invention.

FIG. 3 is a schematic cross-sectional view of the cooling mechanism of the present invention.

FIG. 4 is a schematic cross-sectional view of the bottom case of the present invention.

FIG. 5 is an enlarged view of the structure at A in FIG. 2 according to the present invention.

FIG. 6 is an enlarged view of the structure at B in FIG. 2 according to the present invention.

FIG. 7 is an enlarged view of the structure at C in FIG. 3 according to the present invention.

FIG. 8 is an enlarged view of the structure shown at D in FIG. 4 according to the present invention.

In the figure: 1. a connecting assembly; 101. a cabinet body; 102. a first screen plate; 103. a second screen plate; 104. a first buckle; 105. a second buckle; 106. a screw; 107. a tank body; 108. a frequency converter set; 2. a cooling assembly; 201. a bottom box; 202. a support plate; 203. a drive shaft; 204. a first gear; 205. a second gear; 206. a motor; 207. a driving wheel; 208. a belt; 209. a driven wheel; 210. a first rotating shaft; 211. a sector gear; 212. connecting blocks; 213. a fan-shaped inner toothed ring; 214. a third gear; 215. a second rotating shaft; 216. a fourth gear; 217. a fifth gear; 218. a third rotating shaft; 219. a sixth gear; 220. a seventh gear; 221. a top box; 222. a first limit hole; 223. a second limiting hole; 224. a drive shaft; 225. moving the drum; 226. a side gear; 227. an eighth gear; 228. rotating the column; 229. a fan; 230. a unidirectional screw; 231. a moving block; 232. a limiting column; 233. a limiting wheel; 234. connecting columns; 235. an L-shaped fixed seat; 236. and (5) fixing blocks.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example (b): as shown in fig. 1-8, the present invention provides a variable frequency control system for an air compressor, which includes a connecting assembly 1, wherein the connecting assembly 1 includes a cabinet 101, a frequency converter unit 108 is installed at the center of the bottom end inside the cabinet 101, a tank 107 is connected to one side of the frequency converter unit 108, the variable frequency control system for an air compressor is composed of the frequency converter unit 108 and the tank 107, so as to control the input voltage frequency according to the load change, and can keep the stability of the parameters such as pressure, flow rate, temperature, etc., and improve the working performance of the compressor, two first buckles 104 are installed at one side inside the cabinet 101, which are vertically symmetrical, respectively, the first buckle 104 is connected to a second buckle 105, two sets of symmetrical screws 106 are installed at one side of the second buckle 105, the first buckle 104 is connected to the second buckle 105 through the screws 106, the tank 107 is installed between the first buckle 104 and the second buckle 105 which are vertically distributed, utilize first buckle 104 and second buckle 105 to fix jar body 107, first rectangular hole has all been seted up to two cabinet walls of the symmetry of the cabinet body 101, first rectangular hole is located the cabinet wall department that is close to jar body 107, first rectangular hole internally mounted has the first otter board 102 of symmetry, the second rectangular hole has been seted up to cabinet body 101 one side, the second rectangular hole is located the cabinet wall of keeping away from jar body 107, second rectangular hole internally mounted has the second otter board 103 of symmetry, utilizes and forms the space between first otter board 102 of bilayer and second otter board 103 and first otter board 102 and the second otter board 103 to block that the dust directly gets into inside the cabinet body 101.

Further, a cooling assembly 2 is mounted on one side of the frequency converter unit 108 away from the tank body 107, the cooling assembly 2 includes a bottom case 201, four support plates 202 distributed up and down are mounted inside the bottom case 201, a drive shaft 203 is rotatably mounted on the four support plates 202, a first rotating shaft 210 is rotatably mounted on the support plate 202 at the lowermost layer, a sector gear 211 is mounted at the top end of the first rotating shaft 210, a plurality of annularly distributed connection blocks 212 are mounted on the outer ring of the upper end of the first rotating shaft 210, a sector inner gear ring 213 is mounted on one end of the plurality of annularly distributed connection blocks 212 away from the first rotating shaft 210, a third gear 214 is mounted between the sector inner gear ring 213 and the sector gear 211, a third rotating shaft 218 is rotatably mounted on the three support plates 202 at the top layer, a sixth gear 219 is mounted on the upper end of the third rotating shaft 218, and a seventh gear 220 is engaged with the sixth gear 219, the top box 221 is installed at the top end of the bottom box 201, a transmission shaft 224 is rotatably installed on one side inside the top box 221, a moving cylinder 225 is slidably installed on the transmission shaft 224, a side gear 226 is installed on the outer ring of the moving cylinder 225, the side gear 226 is meshed with an eighth gear 227, a rotating column 228 is installed at the center of the eighth gear 227, a fan 229 is installed at one end, far away from the eighth gear 227, of the rotating column 228, the inside of the cabinet body 101 is cooled through the fan 229, a one-way screw 230 is rotatably installed on the other side inside the top box 221, a moving block 231 is arranged on the one-way screw 230 in a threaded mode, and the moving block 231 is driven to move through rotation of the one-way screw 230.

Furthermore, a first gear 204 is installed on the driving shaft 203, a second gear 205 is engaged with the first gear 204, a motor 206 is installed on the two top supporting plates 202, the output end of the motor 206 is fixedly connected with the center of the second gear 205, the driving shaft 203 is driven to rotate by the motor 206, a driving wheel 207 is installed at the bottom end of the driving shaft 203, a driven wheel 209 is installed at the bottom end of the first rotating shaft 210, a belt 208 is sleeved on the outer rings of the driving wheel 207 and the driven wheel 209, the driving shaft 203 is used to rotate to drive the first rotating shaft 210 to rotate, the third gear 214 can be engaged with a sector gear 211 and a sector inner gear ring 213 respectively, a second rotating shaft 215 is rotatably installed on the two middle supporting plates 202, the bottom end of the second rotating shaft 215 is fixedly connected with the center of the top end of the third gear 214, and the sector inner gear ring 213 and the sector gear 211 are intermittently engaged with the third gear 214, the sector-shaped inner gear ring 213 and the sector-shaped gear 211 can drive the third gear 214 and the second rotating shaft 215 to rotate in a reciprocating manner, the fourth gear 216 is mounted on the second rotating shaft 215, the fourth gear 216 is meshed with the fifth gear 217, the fifth gear 217 is mounted at the lower end of the third rotating shaft 218, and the second rotating shaft 215 is used for rotating to drive the third rotating shaft 218 to rotate.

Furthermore, the transmission shaft 224 is provided with symmetrical limiting grooves, the movable barrel 225 is internally provided with symmetrical limiting blocks, the symmetrical limiting blocks can slide in the symmetrical limiting grooves, the limiting blocks in the movable barrel 225 rotatably arranged in the L-shaped fixing seat 235 slide in the limiting grooves in the transmission shaft 224, so that the movable barrel 225 can slide in the transmission shaft 224 and still can drive the movable barrel 225 to rotate in the rotation of the transmission shaft 224 after the movable barrel 225 moves, the top end of the driving shaft 203 is fixedly connected with the bottom end of the transmission shaft 224, the bottom end of the one-way screw 230 is fixedly connected with the center of the seventh gear 220, the driving shaft 203 rotates to drive the transmission shaft 224 to rotate, the seventh gear 220 rotates to drive the one-way screw 230 to rotate back and forth, one side of the top box 221 is provided with a first limiting hole 222 and a second limiting hole 223, one side of the movable block 231 close to the second limiting hole 223 is provided with symmetrical limiting columns 232, the outer ring of the limiting column 232 is rotatably provided with limiting wheels 233, the symmetrical limiting wheels 233 can slide in the second limiting hole 223, one side, away from the second limiting hole 223, of the moving block 231 is provided with symmetrical connecting columns 234, one end, away from the moving block 231, of the symmetrical connecting columns 234 is provided with an L-shaped fixing seat 235, the moving cylinder 225 is rotatably arranged on the L-shaped fixing seat 235, the moving process of the moving block 231 is limited by the sliding of the limiting wheels 233 in the second limiting hole 223, one side, close to the first limiting hole 222, of the moving block 231 is provided with a fixing block 236, the rotating column 228 is rotatably arranged on the fixing block 236, the rotating column 228 can slide in the first limiting hole 222, the fan 229 is located outside the top box 221, and the rotating column 228 is rotatably arranged on the fixing block 236, so that the fan 229 can move along with the moving block.

The working principle is as follows: when the invention is used, the motor 206 is used for driving the second gear 205 to rotate, the second gear 205 is rotated for driving the first gear 204 to rotate, the driving shaft 203 at the center of the first gear 204 rotates along with the first gear, the driving shaft 203 rotates for driving the transmission shaft 224 connected with the top end of the driving shaft and the driving wheel 207 at the bottom end of the driving shaft to rotate, the driving wheel 207 drives the driven wheel 209 to rotate by using the belt 208, the driven wheel 209 rotates for driving the first rotating shaft 210 to rotate, the first rotating shaft 210 rotates for driving the sector gear 211 and the connecting blocks 212 distributed annularly, the connecting blocks 212 rotate for driving the sector inner gear ring 213 to rotate, the sector inner gear ring 213 and the sector gear 211 are intermittently meshed with the third gear 214, the sector inner gear ring 213 and the sector gear 211 rotate for driving the third gear 214 to rotate in a reciprocating manner, the third gear 214 rotates for driving the second rotating shaft 215 to rotate in a reciprocating manner, and the fourth gear 216 at the upper end of the second rotating shaft 215 to rotate in a reciprocating manner, the fourth gear 216 rotates to drive the fifth gear 217 to rotate in a reciprocating manner, the third rotating shaft 218 at the center of the fifth gear 217 rotates along with the fifth gear 217, and drives the sixth gear 219 at the upper end of the fifth gear to rotate in a reciprocating manner, the sixth gear 219 rotates to drive the seventh gear 220 to rotate in a reciprocating manner, and the one-way screw 230 at the center of the seventh gear 220 rotates in a reciprocating manner;

the one-way screw 230 is used for reciprocating and rotating to drive the moving block 231 with the thread arranged thereon to reciprocate, the limiting wheel 233 is used for sliding in the second limiting hole 223 to limit the moving process of the moving block 231, the moving block 231 reciprocates to drive the fixing block 236 and the L-shaped fixing seat 235 to reciprocate, the fixing block 236 reciprocates to drive the rotating column 228 to slide in the first limiting hole 222, so that the fan 229 can reciprocate, the limiting block in the moving cylinder 225 rotatably arranged in the L-shaped fixing seat 235 slides in the limiting groove on the transmission shaft 224, so that the moving cylinder 225 can slide on the transmission shaft 224, and the moving cylinder 225 can still rotate on the transmission shaft 224 after the moving cylinder 225 moves, the transmission shaft 224 rotates to drive the moving cylinder 225 to rotate on the L-shaped fixing seat 235, the side gear 226 on the outer ring of the moving cylinder 225 rotates along with the side gear 226, and the side gear 226 rotates to drive the eighth gear 227 to rotate, the eighth gear 227 rotates to drive the rotating column 228 to rotate, the rotating column 228 rotates to drive the fan 229 to rotate, heat inside the cabinet 101 is dissipated from the second screen plate 103, and dust is prevented from directly entering the cabinet 101 by a space formed between the first screen plate 102 and the second screen plate 103 and between the first screen plate 102 and the second screen plate 103.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. The utility model provides an air compressor machine frequency conversion control system, includes coupling assembling (1), its characterized in that: the connecting assembly (1) comprises a cabinet body (101), a frequency converter set (108) is installed at the center of the bottom end in the cabinet body (101), a tank body (107) is connected to one side of the frequency converter set (108), a cooling assembly (2) is installed at one side, far away from the tank body (107), of the frequency converter set (108), the cooling assembly (2) comprises a bottom box (201), four supporting plates (202) distributed up and down are installed in the bottom box (201), driving shafts (203) are arranged on the four supporting plates (202) in a rotating mode, a first rotating shaft (210) is arranged on the supporting plate (202) at the bottommost layer in a rotating mode, a sector gear (211) is installed at the top end of the first rotating shaft (210), a plurality of connecting blocks (212) distributed in an annular mode are installed on the outer ring of the upper end of the first rotating shaft (210), and a sector inner gear ring (213) is installed at one end, far away from the first rotating shaft (210), of the connecting blocks (212) distributed in an annular mode, a third gear (214) is installed between the fan-shaped inner gear ring (213) and the fan-shaped gear (211), a third rotating shaft (218) is rotatably arranged on three supporting plates (202) at the top layer, a sixth gear (219) is installed at the upper end of the third rotating shaft (218), a seventh gear (220) is meshed with the sixth gear (219), a top box (221) is installed at the top end of the bottom box (201), a transmission shaft (224) is rotatably arranged at one side inside the top box (221), a moving cylinder (225) is slidably arranged on the transmission shaft (224), a side gear (226) is installed on the outer ring of the moving cylinder (225), an eighth gear (227) is meshed with the side gear (226), a rotating column (228) is installed at the center of the eighth gear (227), a fan (229) is installed at one end, far away from the eighth gear (227), of the rotating column (228), and a one-way screw (230) is rotatably arranged at the other side inside the top box (221), the unidirectional screw (230) is provided with a moving block (231) in a threaded manner.

2. The variable frequency control system of the air compressor according to claim 1, wherein two first buckles (104) are installed on one side of the inside of the cabinet body (101) and are vertically symmetrical, the first buckles (104) are connected with second buckles (105), two groups of symmetrical screws (106) are installed on one side, close to the first buckles (104), of the second buckles (105), the first buckles (104) and the second buckles (105) are connected through the screws (106), and the tank body (107) is installed between the first buckles (104) and the second buckles (105) which are vertically distributed.

3. The frequency conversion control system of the air compressor as claimed in claim 1, wherein two symmetrical cabinet walls of the cabinet body (101) are provided with first rectangular holes, the first rectangular holes are located at the cabinet wall close to the tank body (107), the first screen plates (102) are symmetrically arranged in the first rectangular holes, one side of the cabinet body (101) is provided with second rectangular holes, the second rectangular holes are located on the cabinet wall far away from the tank body (107), and the second screen plates (103) are symmetrically arranged in the second rectangular holes.

4. The variable frequency control system of the air compressor as claimed in claim 1, wherein a first gear (204) is installed on the driving shaft (203), a second gear (205) is engaged with the first gear (204), a motor (206) is installed on the two supporting plates (202) on the top layer, and the output end of the motor (206) is fixedly connected with the center of the second gear (205).

5. The variable frequency control system of the air compressor as claimed in claim 1, wherein a driving wheel (207) is installed at the bottom end of the driving shaft (203), a driven wheel (209) is installed at the bottom end of the first rotating shaft (210), and a belt (208) is sleeved on the outer rings of the driving wheel (207) and the driven wheel (209).

6. The variable frequency control system of the air compressor as claimed in claim 1, wherein the third gear (214) is capable of meshing with the sector gear (211) and the sector inner gear ring (213), a second rotating shaft (215) is rotatably provided on the middle two support plates (202), and the bottom end of the second rotating shaft (215) is fixedly connected with the center of the top end of the third gear (214).

7. The variable frequency control system of the air compressor as claimed in claim 1, wherein a fourth gear (216) is installed on the second rotating shaft (215), a fifth gear (217) is engaged with the fourth gear (216), and the fifth gear (217) is installed at the lower end of the third rotating shaft (218).

8. The variable frequency control system of the air compressor according to claim 1, wherein the transmission shaft (224) is provided with symmetrical limiting grooves, the moving cylinder (225) is internally provided with symmetrical limiting blocks which can slide in the symmetrical limiting grooves, the top end of the driving shaft (203) is fixedly connected with the bottom end of the transmission shaft (224), and the bottom end of the one-way screw (230) is fixedly connected with the center of the seventh gear (220).

9. The variable frequency control system of the air compressor as claimed in claim 1, wherein a first limit hole (222) and a second limit hole (223) are formed in one side of the top box (221), a symmetrical limit post (232) is installed on one side of the moving block (231) close to the second limit hole (223), a limit wheel (233) is rotatably installed on the outer ring of the limit post (232), the symmetrical limit wheel (233) can slide in the second limit hole (223), a symmetrical connecting post (234) is installed on one side of the moving block (231) far away from the second limit hole (223), an L-shaped fixing seat (235) is installed on one end of the symmetrical connecting post (234) far away from the moving block (231), and the moving cylinder (225) is rotatably installed on the L-shaped fixing seat (235).

10. The variable frequency control system of the air compressor as claimed in claim 9, wherein a fixed block (236) is installed at one side of the moving block (231) near the first position-limiting hole (222), the rotating post (228) is rotatably installed on the fixed block (236), the rotating post (228) can slide in the first position-limiting hole (222), and the fan (229) is located outside the top box (221).