Variable frequency air compressor

Abstract

A frequency conversion air compressor comprises a main machine, an air filter and a frequency conversion assembly, the main machine comprises an air cylinder, an air inlet and an air outlet, the air inlet and the air outlet are formed in the air cylinder, an air inlet seat is arranged on the air inlet side of the air cylinder, and an air inlet channel is formed in the air inlet seat. One end of the air inlet channel is communicated with an exhaust port of the air filter, the other end of the air inlet channel is communicated with an air inlet of the air cylinder, the frequency conversion assembly is arranged in the air inlet base and located on the outer side of the air inlet channel, and the air inlet channel is of a heat conduction structure and used for guiding heat in the air inlet base out into the air inlet channel. According to the variable-frequency air compressor, the variable-frequency assembly is integrated in the main machine, the integration degree is high, the heat dissipation and dustproof effects are good, and a heat dissipation fan does not need to be arranged for heat dissipation of the variable-frequency assembly.

Description

Technical Field

[0001] The utility model relates to the technical field of air compressors, in particular to a variable frequency air compressor. Background Art

[0002] An air compressor, also known as an air compressor, consists of a main engine and a drive source, typically a motor. An air compressor is a device that converts mechanical energy into gas pressure energy. Driven by a motor, it compresses air, providing a source of power.

[0003] Currently, air compressors are usually equipped with frequency conversion components to achieve fully automated control of the air compressor's exhaust volume, thereby achieving the goal of energy conservation and emission reduction. However, the current frequency conversion air compressors have a low level of integration, and components such as frequency conversion components are usually installed independently, requiring the production of multiple brackets to fix the combination. In order to fix the various components, and considering the high dustproof requirements of components such as frequency conversion components, it is usually necessary to set up a chassis to install all the components. However, the heat dissipation effect of components such as frequency conversion components installed in the chassis is poor, and high-temperature shutdown failures are very likely to occur. In order to address the heat dissipation problem of components such as frequency conversion components in the chassis, the Chinese utility model patent with authorization announcement number CN211924401U discloses a frequency conversion air compressor, which is achieved by setting a cooling fan in the chassis and opening a heat dissipation port on the chassis body. A dustproof net is also provided on the heat dissipation port to prevent dust from entering.

[0004] However, existing variable frequency air compressors still have the following technical problems: variable frequency components are installed independently, with a low degree of integration; there is an irreconcilable contradiction between heat dissipation and dust prevention of variable frequency components; and cooling fans are required to dissipate heat from variable frequency components, which increases costs and energy consumption. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a variable frequency air compressor which integrates a variable frequency component into a host machine, has a high degree of integration, good heat dissipation and dustproof effects, and does not require a cooling fan to dissipate heat for the variable frequency component.

[0006] The technical solution of the present utility model is: a variable frequency air compressor, including a main unit, an air filter and a frequency conversion component, the main unit including a cylinder, and an air inlet and an exhaust port arranged on the cylinder, an air inlet seat is provided on the air inlet side of the cylinder, an air inlet channel is provided in the air inlet seat, one end of the air inlet channel is connected to the exhaust port of the air filter and the other end is connected to the air inlet of the cylinder, the frequency conversion component is arranged in the air inlet seat and is located on the outside of the air inlet channel, and the air inlet channel is arranged as a heat-conducting structure for conducting heat in the air inlet seat to the air inlet channel.

[0007] After adopting the above structure, the utility model has the following advantages:

[0008] The variable frequency air compressor of the present invention integrates the variable frequency component in the air intake seat of the main engine, with a high degree of integration; since the air intake seat is close to the enclosed space and is connected to the air filter, the variable frequency component is installed therein, which has a good dust-proof effect; although the air intake seat is close to the enclosed space, due to the provision of the air intake channel with a heat-conducting function, the heat emitted by the variable frequency component in the air intake seat can be quickly conducted to the air intake channel, and the heat is quickly dissipated by using the intake air, and finally discharged from the exhaust port of the cylinder along with the compressed air; therefore, an air intake channel is provided in the almost enclosed air intake seat, and the air intake of the device itself is directly used to dissipate the heat of the variable frequency component, which not only solves the irreconcilable contradiction between heat dissipation and dust prevention, and makes the heat dissipation and dust-proof effects of the variable frequency component better, but also does not need to provide a cooling fan for the variable frequency component, and the cost and energy consumption are lower.

[0009] Preferably, the air intake passage is made of a thermally conductive material, and a plurality of first thermally conductive fins are evenly distributed along the circumference of the inner sidewall of the air intake passage, each of which extends axially along the air intake passage. This arrangement increases the heat dissipation area of ​​the air intake passage, and the extension direction of the first thermally conductive fins aligns with the direction of intake air flow, both of which enhance the heat conduction effect of the air intake passage.

[0010] Preferably, the air inlet passage is disposed transversely within the air inlet seat, and a partition is provided within the air inlet seat and on the outside of the air inlet passage. One side of the partition is adjacent to the air inlet passage, and the other side is provided with a slot, into which the frequency conversion component is retractably mounted. Providing the partition close to the air inlet passage allows heat generated by the frequency conversion component to be better directed into the air inlet passage, and providing the slot for mounting the frequency conversion component facilitates both installation and removal.

[0011] Preferably, the air intake seat is made of a heat-conducting material and a plurality of second heat-conducting fins are provided on the outer wall of the air intake seat to conduct heat from the air intake seat to the outside. This arrangement allows the air intake seat to conduct part of the heat from the inverter assembly, thereby improving the overall heat dissipation effect.

[0012] Preferably, the cylinder is made of a heat-conducting material and has a plurality of third heat-conducting fins on its outer wall for dissipating heat from the cylinder to the outside. This arrangement allows the cylinder to partially dissipate heat from the high-temperature, high-pressure gas inside, further improving the overall heat dissipation effect.

[0013] Preferably, the system also includes a motor and a muffler. The air filter, intake housing, cylinder, and motor are fixed together in sequence from left to right. The exhaust port is located at the top of the cylinder, and the muffler is fixed above the exhaust port. This arrangement is rational and convenient for the direct connection and integration of various components. The frequency conversion component is also integrated into the intake housing, eliminating the need for a chassis surrounding these components and requiring excessive connection brackets. This meets the requirements of fixation and dustproofing, resulting in a more integrated and compact overall structure.

[0014] As an advantage, the system further includes a controller electrically connected to the frequency conversion assembly, wherein the controller is fixed to the top of the air inlet seat. This arrangement not only facilitates the connection between the frequency conversion assembly and the controller, but also makes the installation and operation of the controller more convenient.

[0015] Preferably, the motor includes a motor housing made of a thermally conductive material and provided with a plurality of fourth heat conducting fins on the outer wall of the motor housing for dissipating heat within the motor housing to the outside. This arrangement utilizes the motor housing to dissipate some of the heat within the motor, further improving the overall heat dissipation effect.

[0016] Preferably, the system further includes a motor shaft disposed within the motor housing, with a cooling fan disposed outside the motor housing. One end of the motor shaft is connected to the main unit, and the other end is connected to the cooling fan. This arrangement utilizes the cooling fan to further dissipate heat from the motor, further improving the overall cooling effect. Furthermore, the cooling fan is directly driven by the motor shaft, further simplifying the structure.

[0017] Preferably, a protective cover is provided outside the cooling fan, and the protective cover is provided with air holes. This arrangement is conducive to the safe operation and dust prevention of the cooling fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural diagram of the utility model variable frequency air compressor;

[0019] Figure 2 This is another structural diagram of the variable frequency air compressor of the utility model;

[0020] Figure 3 This is a top view of the variable frequency air compressor of the utility model;

[0021] Figure 4 for Figure 3 Cross-sectional view along AA';

[0022] Figure 5 for Figure 3 Cross-sectional view along the middle line BB';

[0023] In the figure: 1-main engine, 2-air filter, 3-frequency conversion assembly, 4-cylinder, 5-cylinder air intake, 6-cylinder exhaust, 7-intake seat, 8-intake channel, 9-motor, 10-gearbox, 11-first heat conducting plate, 12-partition, 13-slot, 14-second heat conducting plate, 15-third heat conducting plate, 16-muffler, 17-oil filling hole, 18-controller, 19-motor housing, 20-fourth heat conducting plate, 21-cooling fan, 22-protective cover, 23-air vent, 24-cover, 25-first seal, 26-second seal. DETAILED DESCRIPTION

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0025] Example:

[0026] like Figure 1-Figure 5 As shown, a variable frequency air compressor includes a main unit 1, an air filter 2 and a frequency conversion component 3. The main unit 1 includes a cylinder 4, and an air inlet 5 and an exhaust port 6 arranged on the cylinder 4. An air inlet seat 7 is provided on the side of the air inlet 5 of the cylinder 4, and an air inlet channel 8 is provided in the air inlet seat 7. One end of the air inlet channel 8 is connected to the exhaust port of the air filter 2 and the other end is connected to the air inlet 5 of the cylinder 4. The frequency conversion component 3 is arranged in the air inlet seat 7 and is located on the outside of the air inlet channel 8. The air inlet channel 8 is set as a heat-conducting structure for conducting heat in the air inlet seat 7 to the air inlet channel 8.

[0027] The variable frequency air compressor of this embodiment integrates the variable frequency component 3 into the air intake seat 7 of the main unit 1, with a high degree of integration; since the air intake seat 7 is close to a closed space and is connected to the air filter 2, the frequency conversion component 3 is installed therein, which has a good dust-proof effect; although the air intake seat 7 is close to a closed space, due to the setting of the air intake channel 8 with a heat-conducting function, the heat discharged by the frequency conversion component 3 in the air intake seat 7 can be quickly conducted to the air intake channel 8, and the heat is quickly dissipated by using the intake air, and finally discharged from the exhaust port 6 of the cylinder 4 along with the compressed air; therefore, an air intake channel 8 is set in the almost closed air intake seat 7, and the air intake of the device itself is directly used to dissipate the heat of the frequency conversion component 3, which not only solves the irreconcilable contradiction between heat dissipation and dust prevention, so that the heat dissipation and dust-proof effects of the frequency conversion component 3 are better, but also there is no need to set a cooling fan for the frequency conversion component 3, which has lower cost and energy consumption.

[0028] The air intake passage 8 is made of a heat-conducting material. Multiple first heat-conducting fins 11 are evenly distributed along the circumference of the inner sidewall of the air intake passage 8. Each first heat-conducting fin 11 extends in the axial direction of the air intake passage 8. This arrangement increases the heat dissipation area of ​​the air intake passage 8. Furthermore, the extension direction of the first heat-conducting fins 11 aligns with the direction of the intake air flow, both of which enhance the heat conduction effect of the air intake passage 8.

[0029] The air inlet passage 8 is disposed transversely within the air inlet seat 7. A partition 12 is provided within the air inlet seat 7 and on the outside of the air inlet passage 8. One side of the partition 12 is adjacent to the air inlet passage 8, and the other side is provided with a slot 13. The frequency conversion assembly 3 is retractably mounted within the slot 13. In this embodiment, two frequency conversion assemblies 3 are provided, corresponding to two partitions 12. Placing the partition 12 close to the air inlet passage 8 allows heat generated by the frequency conversion assembly 3 to be better directed into the air inlet passage 8. The provision of the slot 13 for mounting the frequency conversion assembly 3 facilitates both installation and removal.

[0030] The air intake seat 7 is made of a heat-conducting material and a plurality of second heat-conducting fins 14 are provided on the outer wall of the air intake seat 7 to conduct heat from the air intake seat 7 to the outside. This arrangement can use the air intake seat 7 to conduct part of the heat of the frequency conversion component 3, thereby improving the overall heat dissipation effect.

[0031] The cylinder 4 is made of a heat-conducting material and has a plurality of third heat-conducting fins 15 on its outer wall for dissipating heat from the cylinder 4 to the outside. This arrangement allows the cylinder 4 to dissipate some of the heat from the high-temperature, high-pressure gas inside, further improving the overall heat dissipation effect.

[0032] It also includes a motor 9 and a muffler 16. The air filter 2, the air intake seat 7, the cylinder 4 and the motor 9 are fixed together in sequence from left to right. The exhaust port 6 is set at the top of the cylinder 4, and the muffler 16 is fixed above the exhaust port 6. This embodiment is an oil-injected screw air compressor. The cylinder 4 of the main unit 1 is provided with a male rotor and a female rotor that mesh with each other. A gearbox 10 is provided between the cylinder 4 and the motor 9. The motor 9 is connected to the male rotor or the female rotor through the gearbox 10. The cylinder 4 is also provided with an oil filling hole 17 for providing lubricating oil to the two rotors and the gearbox 10. The internal structure of the main unit 1, the motor 9 and the gearbox 10 can adopt the existing technology and is not shown in the figure. This arrangement is reasonable and convenient for the direct connection and integration of various components. The frequency conversion component 3 is also integrated in the air intake seat 7, so there is no need to set a chassis outside these components, nor is there a need for too many connecting brackets. It can meet the needs of fixation and dustproofing, so the overall structure has a higher degree of integration and is more compact.

[0033] It also includes a controller 18 electrically connected to the frequency conversion component 3, and the controller 18 is fixed to the top of the air inlet seat 7. This arrangement not only facilitates the connection between the frequency conversion component 3 and the controller 18, but also makes the installation and operation of the controller 18 more convenient.

[0034] Motor 9 includes a motor housing 19 made of a thermally conductive material. Multiple fourth heat conducting fins 20 are provided on the outer wall of motor housing 19 to dissipate heat from within motor housing 19 to the outside. This arrangement utilizes motor housing 19 to dissipate some of the heat from within motor 9, further improving the overall heat dissipation effect.

[0035] The motor housing 19 also includes a motor shaft disposed within the motor housing 19. A cooling fan 21 is also disposed outside the motor housing 19. One end of the motor shaft is connected to the main unit 1, and the other end is connected to the cooling fan 21. The motor shaft can be constructed using existing technology, which is not shown in the figure. Typically, a stator is also fixed within the motor housing 19, and a rotor is rotatably disposed within the stator, with the motor shaft mounted within the rotor. This arrangement utilizes the cooling fan 21 to further dissipate heat from the motor 9, further improving the overall cooling effect. Furthermore, the cooling fan 21 is directly driven by the motor shaft, simplifying the structure.

[0036] A protective cover 22 is further provided outside the heat dissipation fan 21, and a vent hole 23 is provided on the protective cover 22. This arrangement is conducive to the safe operation and dust prevention of the heat dissipation fan 21.

[0037] In this embodiment, a removable cover plate 24 is provided on the side of the air intake seat 7 close to the air filter 2, and the cover plate 24 is sealed with the air intake seat 7 through a first seal 25; the air intake channel 8 extends out of the cover plate 24 and a second seal 26 is provided between the cover plate 24.

[0038] The heat dissipation principle of the variable frequency air compressor in this embodiment is as follows:

[0039] The motor 9 runs, driving the positive rotor and the negative rotor to run; the operation of the positive rotor and the negative rotor will generate a strong negative pressure, causing the air filter 2 to continuously inhale low-temperature air from the outside; the low-temperature air purified by the air filter 2 enters the air intake channel 8 of the air intake seat 7, and at the same time, the heat of the frequency conversion component 3 in the air intake seat 7 is also exported to the air intake channel 8, so that the heat can be quickly dissipated by using the incoming air, and then the heat exported from the air intake seat 7 follows the incoming air into the cylinder 4 to participate in the compression movement of the positive rotor and the negative rotor, and finally is discharged from the exhaust port 6 of the cylinder 4 with the compressed air; in addition, the heat conductive plates arranged on the air intake seat 7, the cylinder 4 and the motor housing 19 can also discharge part of the internal heat, further improving the overall heat dissipation effect.

Claims

1. A variable frequency air compressor, comprising a main unit (1), an air filter (2) and a frequency conversion assembly (3), wherein the main unit (1) comprises a cylinder (4), and an air inlet (5) and an exhaust port (6) provided on the cylinder (4), an air inlet seat (7) being provided on the air inlet (5) side of the cylinder (4), and characterized in that: An air intake channel (8) is provided in the air intake seat (7), one end of the air intake channel (8) is connected to the exhaust port of the air filter (2) and the other end is connected to the air intake port (5) of the cylinder (4), the frequency conversion component (3) is provided in the air intake seat (7) and is located outside the air intake channel (8), and the air intake channel (8) is provided as a heat-conducting structure for conducting heat in the air intake seat (7) to the air intake channel (8).

2. The variable frequency air compressor according to claim 1, characterized in that: The air intake channel (8) is made of a heat-conducting material, and a plurality of first heat-conducting plates (11) are evenly distributed on the inner side wall of the air intake channel (8) and along the circumferential direction, and each of the first heat-conducting plates (11) extends along the axial direction of the air intake channel (8).

3. The variable frequency air compressor according to claim 1, characterized in that: The air intake channel (8) is transversely arranged in the air intake seat (7), and a partition (12) is provided in the air intake seat (7) and on the outside of the air intake channel (8). One side of the partition (12) is close to the air intake channel (8) and the other side is provided with a card slot (13), and the frequency conversion component (3) can be pulled out and installed in the card slot (13).

4. The variable frequency air compressor according to claim 1, characterized in that: The air intake seat (7) is made of a heat-conducting material and a plurality of second heat-conducting sheets (14) are provided on the outer wall of the air intake seat (7) for conducting heat in the air intake seat (7) to the outside.

5. The variable frequency air compressor according to claim 1, characterized in that: The cylinder (4) is made of a heat-conducting material and a plurality of third heat-conducting sheets (15) are provided on the outer wall of the cylinder (4) for conducting heat in the cylinder (4) to the outside.

6. The variable frequency air compressor according to claim 1, characterized in that: The invention also includes a motor (9) and a muffler (16). The air filter (2), the air intake seat (7), the cylinder (4) and the motor (9) are fixed together in sequence from left to right. The exhaust port (6) is arranged at the top of the cylinder (4), and the muffler (16) is fixed above the exhaust port (6).

7. The variable frequency air compressor according to claim 6, characterized in that: It also includes a controller (18) electrically connected to the frequency conversion component (3), and the controller (18) is fixed on the top of the air intake seat (7).

8. The variable frequency air compressor according to claim 6, characterized in that: The motor (9) comprises a motor housing (19), the motor housing (19) is made of a heat-conducting material, and a plurality of fourth heat-conducting sheets (20) are provided on the outer wall of the motor housing (19) for dissipating heat in the motor housing (19) to the outside.

9. The variable frequency air compressor according to claim 8, characterized in that: It also includes a motor shaft arranged in the motor housing (19), a cooling fan (21) is also provided outside the motor housing (19), one end of the motor shaft is connected to the host (1) and the other end is connected to the cooling fan (21).

10. The variable frequency air compressor according to claim 9, characterized in that: A protective cover (22) is further provided outside the heat dissipation fan (21), and an air vent (23) is provided on the protective cover (22).

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