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 invention relates to the technical field of air compressors, and in particular to a variable frequency air compressor. Background Art

[0002] Air compressor is also called air compressor. Its core components include host and driving source, the driving source is generally a motor. Air compressor is a device that converts mechanical energy into gas pressure energy. It is driven by a motor and used to compress air. Its function is to provide gas source power.

[0003] At present, air compressors are usually equipped with frequency conversion components to achieve fully automated control of the air compressor's exhaust volume and achieve the goal of energy conservation and emission reduction. However, the current frequency conversion air compressors have a low degree 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 response to the heat dissipation problem of components such as frequency conversion components in the chassis, a 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 set on the heat dissipation port to prevent dust from entering.

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

[0005] The technical problem to be solved by the present invention is to provide a variable frequency air compressor which integrates a variable frequency component in a main engine, has a high degree of integration, good heat dissipation and dustproof effects, and does not require a heat dissipation fan to dissipate heat from the variable frequency component.

[0006] The technical solution of the present invention is: a variable frequency air compressor, including a main unit, an air filter and a frequency conversion component, the main unit includes 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 located on the outside of the air inlet channel, and the air inlet channel is arranged as a heat-conducting structure for exporting heat in the air inlet seat to the air inlet channel.

[0007] After adopting the above structure, the present invention 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, and has 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 setting of the air intake channel with a heat-conducting function, the heat discharged 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 with the compressed air. Therefore, an air intake channel is set 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 there is no need to set a cooling fan for the frequency conversion component, and the cost and energy consumption are lower.

[0009] Preferably, the air intake passage is made of a heat-conducting material, and a plurality of first heat-conducting sheets are evenly arranged on the inner side wall of the air intake passage and along the circumferential direction, and each of the first heat-conducting sheets extends along the axial direction of the air intake passage. This arrangement increases the heat dissipation area of ​​the air intake passage, and the extension direction of the first heat-conducting sheets is consistent with the airflow direction of the intake air, both of which improve the heat conduction effect of the air intake passage.

[0010] Preferably, the air inlet passage is transversely arranged in the air inlet seat, a partition is arranged in the air inlet seat and outside the air inlet passage, one side of the partition is close to the air inlet passage and a slot is arranged on the other side, and the frequency conversion component can be installed in the slot in a pull-out manner. The partition is arranged close to the air inlet passage so that the heat generated by the frequency conversion component can be better guided into the air inlet passage, and the slot is arranged to install the frequency conversion component, so that the installation and removal of the frequency conversion component are more convenient.

[0011] Preferably, the air inlet seat is made of a heat-conducting material and a plurality of second heat-conducting sheets are provided on the outer wall of the air inlet seat for conducting heat in the air inlet seat to the outside. This arrangement can utilize the air inlet seat to conduct part of the heat of the frequency conversion component, and the overall heat dissipation effect is better.

[0012] Preferably, the cylinder is made of a heat-conducting material and a plurality of third heat-conducting sheets are provided on the outer wall of the cylinder to conduct the heat in the cylinder to the outside. This arrangement can utilize the cylinder to conduct part of the heat of the internal high-temperature and high-pressure gas, further improving the overall heat dissipation effect.

[0013] Preferably, it also includes a motor and a muffler, the air filter, the air intake seat, the cylinder and the motor are fixed together in sequence from left to right, the exhaust port is set at the top of the cylinder, and the muffler is fixed above the exhaust port. The arrangement is reasonable, which facilitates the direct connection and integration of various components, and the frequency conversion component is also integrated in the air intake seat, so there is no need to set up a chassis outside these components, and there is no need for too many connection brackets, which can meet the needs of fixing and dust prevention, so the overall structure has a higher degree of integration and is more compact.

[0014] As a preference, a controller electrically connected to the frequency conversion assembly is also included, and the controller is fixed on 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, the motor housing is made of a heat-conducting material, and a plurality of fourth heat-conducting sheets are provided on the outer wall of the motor housing for conducting heat from the motor housing to the outside. This arrangement utilizes the motor housing to conduct part of the heat from the inside of the motor, and the overall heat dissipation effect is further improved.

[0016] Preferably, the motor housing further comprises a motor shaft, a cooling fan is arranged outside the motor housing, one end of the motor shaft is connected to the host and the other end is connected to the cooling fan. The cooling fan is used to further dissipate heat from the motor, and the overall cooling effect is further improved; and the cooling fan is directly driven by the motor shaft, and the structure is further simplified.

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

[0018] Figure 1 It is a structural schematic diagram of the variable frequency air compressor of the present invention;

[0019] Figure 2 Another structural schematic diagram of the variable frequency air compressor of the present invention;

[0020] Figure 3 It is a top view of the variable frequency air compressor of the present invention;

[0021] Figure 4 for Figure 3 Sectional view along AA';

[0022] Figure 5 for Figure 3 Sectional view along the middle line BB';

[0023] In the figure: 1-main engine, 2-air filter, 3-frequency conversion assembly, 4-cylinder, 5-air inlet of cylinder, 6-exhaust port of cylinder, 7-intake seat, 8-intake channel, 9-motor, 10-gear box, 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 plate, 25-first sealing member, 26-second sealing member. 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. 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 arranged 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, and the degree of integration is high. Since the air intake seat 7 is close to the enclosed 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 the enclosed space, due to the setting of the air intake channel 8 with a heat-conducting effect, 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, the air intake channel 8 is set in the almost enclosed 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, so the cost and energy consumption are lower.

[0028] The air intake passage 8 is made of a heat-conducting material, and a plurality of first heat-conducting sheets 11 are evenly arranged on the inner side wall of the air intake passage 8 and along the circumferential direction, and each first heat-conducting sheet 11 extends along the axial direction of the air intake passage 8. This arrangement increases the heat dissipation area of ​​the air intake passage 8, and the extension direction of the first heat-conducting sheet 11 is consistent with the air flow direction of the intake air, both of which make the heat conduction effect of the air intake passage 8 better.

[0029] The air inlet passage 8 is horizontally arranged in the air inlet seat 7. A partition 12 is arranged in the air inlet seat 7 and outside the air inlet passage 8. One side of the partition 12 is close to the air inlet passage 8 and a slot 13 is arranged on the other side. The frequency conversion component 3 can be installed in the slot 13 in a pull-out manner. In this embodiment, two frequency conversion components 3 are arranged, and two partitions 12 are also arranged accordingly. The partition 12 is arranged close to the air inlet passage 8 so that the heat generated by the frequency conversion component 3 can be better guided into the air inlet passage 8. The slot 13 is arranged to install the frequency conversion component 3, and the installation and removal of the frequency conversion component 3 are relatively convenient.

[0030] The air inlet 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 inlet seat 7 to conduct heat from the air inlet seat 7 to the outside. This arrangement can utilize the air inlet seat 7 to conduct part of the heat of the frequency conversion component 3, and the overall heat dissipation effect is better.

[0031] The cylinder 4 is made of heat-conducting material and a plurality of third heat-conducting sheets 15 are provided on the outer wall of the cylinder 4 to conduct heat from the cylinder 4 to the outside. This arrangement can utilize the cylinder 4 to conduct part of the heat of the internal high-temperature and high-pressure gas, further improving the overall heat dissipation effect.

[0032] It also includes a motor 9 and a muffler 16, an air filter 2, an air intake seat 7, a cylinder 4 and a motor 9 are fixed together in sequence from left to right, an exhaust port 6 is arranged at the top of the cylinder 4, and a muffler 16 is fixed above the exhaust port 6; this embodiment is an oil-injected screw air compressor, a male rotor and a female rotor meshing with each other are arranged in the cylinder 4 of the main engine 1, a gear box 10 is arranged between the cylinder 4 and the motor 9, the motor 9 is connected to the male rotor or the female rotor through the gear box 10, and an oil injection hole 17 is also arranged on the cylinder 4 for providing lubricating oil to the two rotors and the gear box 10, and the internal structure of the main engine 1, the motor 9 and the gear box 10 can adopt the existing technology, and no schematic diagram is given in the figure. The layout of this setting is reasonable, which facilitates the direct connection and integration of various components, and 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, and there is no need for too many connecting brackets, which can meet the needs of fixing 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 assembly 3, and the controller 18 is fixed on the top of the air inlet seat 7. This arrangement not only facilitates the connection between the frequency conversion assembly 3 and the controller 18, but also makes the installation and operation of the controller 18 more convenient.

[0034] The motor 9 includes a motor housing 19, which is made of a heat-conducting material and has a plurality of fourth heat-conducting sheets 20 disposed on the outer wall of the motor housing 19, for dissipating the heat in the motor housing 19 to the outside. This arrangement utilizes the motor housing 19 to dissipate part of the heat inside the motor 9, and the overall heat dissipation effect is further improved.

[0035] It also includes a motor shaft arranged in the motor housing 19, and a cooling fan 21 is arranged 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. The motor shaft can be made of existing technology, which is not shown in the figure. Generally, a stator is fixed in the motor housing 19, and a rotor is rotatably arranged in the stator, and the motor shaft is installed in the rotor. This arrangement uses the cooling fan 21 to further dissipate heat from the motor 9, and the overall cooling effect is further improved; and the cooling fan 21 is directly driven by the motor shaft, and the structure is more simplified.

[0036] A protective cover 22 is also 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 tightly covered 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 running 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 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) arranged on the cylinder (4), an air inlet seat (7) being arranged on the air inlet (5) side of the cylinder (4), and characterized in that: An air intake passage (8) is provided in the air intake seat (7), one end of the air intake passage (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 arranged in the air intake seat (7) and is located on the outside of the air intake passage (8), and the air intake passage (8) is arranged as a heat-conducting structure for conducting heat in the air intake seat (7) to the air intake passage (8).

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

3. A variable frequency air compressor according to claim 1, characterized in that: The air intake passage (8) is transversely arranged in the air intake seat (7), a partition (12) is arranged in the air intake seat (7) and on the outside of the air intake passage (8), one side of the partition (12) is close to the air intake passage (8) and the other side is provided with a slot (13), and the frequency conversion component (3) can be pulled out and installed in the 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 inside 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: It also includes a motor (9) and a muffler (16), wherein 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. A 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) being made of a heat-conducting material and having a plurality of fourth heat-conducting sheets (20) disposed on an outer side wall of the motor housing (19) for dissipating heat in the motor housing (19) to the outside.

9. A 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 arranged outside the motor housing (19), one end of the motor shaft is connected to the main machine (1) and the other end is connected to the cooling fan (21).

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

Images