Permanent magnet variable frequency air compressor structure

Abstract

The utility model discloses a kind of permanent magnet variable frequency air compressor structure, belong to air compressor technical field, including shunt valve body, one shunt valve body is set between machine head and oil-gas separation bucket, another shunt valve body is set in machine head oil injection port, shunt valve body includes shunt passage one, shunt passage two, main stream passage, solenoid valve one and solenoid valve two, shunt passage one and shunt passage two are communicated with main stream passage respectively, solenoid valve one is arranged in shunt passage one, solenoid valve two is arranged in shunt passage two. The utility model one is changed the present situation that traditional permanent magnet variable frequency air compressor low-frequency constant pressure gas supply time machine head speed reduction, oil injection amount unchanged, volumetric efficiency is low, power consumption increases, two is changed the separation linear velocity of compressed oil-gas mixture after traditional permanent magnet variable frequency air compressor low-frequency constant pressure gas supply time into oil-gas separation bucket is not enough, oil-gas separation effect is poor, increase the oil content of compressed air of oil separation discharge problem.

Description

Technical Field

[0001] This utility model relates to the field of air compressor technology, and in particular to a permanent magnet variable frequency air compressor structure. Background Technology

[0002] Existing air compressors have some problems: First, traditional permanent magnet variable frequency air compressors do not change the oil injection volume of the compressor head when supplying air at low frequency and constant pressure. This results in the compressor head speed already decreasing when supplying air at low frequency and constant pressure, and the intake volume decreasing, but the oil injection volume does not decrease accordingly, resulting in lower volumetric efficiency and increased power consumption.

[0003] Secondly, when a traditional permanent magnet variable frequency air compressor supplies air at low frequency and constant pressure, it does not change the diameter between the compressor head exhaust port and the oil-gas separator. When supplying air at low frequency and constant pressure, the compressor head speed has already decreased and the intake volume has decreased, but the diameter between the compressor head exhaust port and the oil-gas separator has not decreased accordingly. This results in insufficient separation linear velocity after the compressed oil-gas mixture enters the oil-gas separator, leading to a poorer oil-gas separation effect and an increased oil content in the compressed air discharged from the oil separator. Utility Model Content

[0004] The purpose of this invention is to provide a permanent magnet variable frequency air compressor structure that solves two problems existing in the prior art. First, traditional permanent magnet variable frequency air compressors do not change the oil injection quantity at the compressor head during low-frequency constant pressure air supply. This results in the compressor head speed decreasing during low-frequency constant pressure air supply, reducing the intake volume but not the corresponding oil injection quantity, leading to lower volumetric efficiency and increased power consumption. Second, while the compressor head speed and intake volume decrease during low-frequency constant pressure air supply, the diameter between the compressor head exhaust port and the oil-gas separator does not decrease accordingly. This results in insufficient separation linear velocity of the compressed oil-gas mixture after entering the oil-gas separator, leading to poorer oil-gas separation and increased oil content in the discharged compressed air.

[0005] To achieve the above objectives, this utility model provides a permanent magnet variable frequency air compressor structure, including a flow divider valve body, one of which is disposed between the compressor head and the oil-gas separator, and the other of which is disposed at the oil injection port of the compressor head. The diverter valve body includes a diverter channel one, a diverter channel two, a main channel, a solenoid valve one, and a solenoid valve two. The main channel is located in the middle of the diverter valve body. The diverter channel one and the diverter channel two are located on both sides of the main channel. The diverter channel one and the diverter channel two are respectively connected to the main channel. An oil inlet and an oil outlet are respectively provided at both ends of the main channel. A solenoid valve is installed in the first diversion channel, and a solenoid valve is installed in the second diversion channel. Three valve cores are fixedly connected to the moving shaft of the solenoid valve, and three valve cores are fixedly connected to the moving shaft of the solenoid valve.

[0006] Preferably, a flow-limiting port is provided in the middle of the main channel.

[0007] Preferably, a left connecting channel one and a left connecting channel two are provided between the main channel and the branch channel one.

[0008] Preferably, a right connecting channel one and a right connecting channel two are provided between the main channel and the branch channel two.

[0009] Preferably, the first solenoid valve and the second solenoid valve are electrically connected to the controller. The controller controls the movement of the moving shaft of the first solenoid valve, thereby controlling the three valve cores to simultaneously close or open the left connecting channel one and the left connecting channel two. The controller also controls the movement of the moving shaft of the second solenoid valve, thereby controlling the three valve cores to simultaneously close or open the right connecting channel one and the right connecting channel two.

[0010] The advantages and positive effects of this utility model are as follows: (1) This utility model adopts a multi-channel oil injection design for the oil injection port of the compressor head according to the operating speed of the compressor head. One of them is a constant-flow design to ensure the minimum oil injection volume required for the operation of the compressor head. The other channels are adjusted according to the operating speed of the compressor head. This changes the situation where the compressor head speed decreases, the oil injection volume remains unchanged, the volumetric efficiency decreases, and the power consumption increases when the traditional permanent magnet variable frequency air compressor is supplied with low-frequency constant pressure air.

[0011] (2) This utility model adopts a multi-channel design for the passage between the exhaust port of the compressor head and the oil-gas separator according to the operating speed of the compressor head. One channel is a normally open design to ensure that the oil-gas mixture after compression by the compressor head is discharged into the oil-gas separator. The other channels are adjusted according to the operating speed of the compressor head, which changes the problem that the separation linear velocity of the compressed oil-gas mixture entering the oil-gas separator is insufficient when the traditional permanent magnet variable frequency air compressor supplies air at low frequency constant pressure.

[0012] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the diversion valve body of this utility model; Figure 2 This is a schematic diagram of the diversion valve body of this utility model in one of its usage states; Figure 3 This is a schematic diagram of the second usage state of the diversion valve body of this utility model; Figure 4 This is a schematic diagram of the third usage state of the diversion valve body of this utility model; Figure 5 This is a schematic diagram of the installation of the diversion valve body of this utility model.

[0014] Figure Labels 1. Diversion Channel 1; 2. Diversion Channel 2; 3. Main Flow Channel; 4. Solenoid Valve 1; 401. Valve Core 1; 5. Solenoid Valve 2; 501. Valve Core 2; 6. Oil Inlet; 7. Oil Outlet; 8. Flow Limiting Port; 9. Oil-Gas Separator; 10. Machine Head; 11. Left Connecting Channel 1; 12. Left Connecting Channel 2; 13. Right Connecting Channel 1; 14. Right Connecting Channel 2. Detailed Implementation

[0015] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0016] In this application, unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. In case of any inconsistency, the meaning set forth in this specification or derived from the content described herein shall prevail. Furthermore, the terminology used herein is for the purpose of describing embodiments of this application only and is not intended to limit the scope of this application.

[0017] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0018] like Figures 1-5 As shown, a permanent magnet variable frequency air compressor structure includes a flow divider valve body, one of which is disposed between the compressor head 10 and the oil-gas separator 9, and the other flow divider valve body is disposed at the oil injection port of the compressor head 10. The main body of the diverter valve includes a diverter channel 1, a diverter channel 2, a main channel 3, a solenoid valve 4, and a solenoid valve 5. The main channel 3 is located in the middle of the main body of the diverter valve. The diverter channel 1 and the diverter channel 2 are located on both sides of the main channel 3. The diverter channel 1 and the diverter channel 2 are respectively connected to the main channel 3. The two ends of the main channel 3 are respectively provided with an oil inlet 6 and an oil outlet 7. Solenoid valve 4 is installed in diversion channel 1, and solenoid valve 5 is installed in diversion channel 2. Three valve cores 401 are fixedly connected to the moving shaft of solenoid valve 4, and three valve cores 501 are fixedly connected to the moving shaft of solenoid valve 5.

[0019] A flow-limiting port 8 is set in the middle of the main channel 3.

[0020] A left connecting channel 11 and a left connecting channel 2 12 are provided between the main channel 3 and the branch channel 1.

[0021] A right connecting channel 13 and a right connecting channel 2 14 are provided between the main channel 3 and the branch channel 2.

[0022] Solenoid valve 4 and solenoid valve 5 are electrically connected to the controller. The controller controls the movement of the moving shaft of solenoid valve 4, thereby controlling the three valve cores 401 to simultaneously close or open the left connecting channel 11 and the left connecting channel 12. The controller also controls the movement of the moving shaft of solenoid valve 5, thereby controlling the three valve cores 501 to simultaneously close or open the right connecting channel 13 and the right connecting channel 14. Specifically, the movement principle of valve cores 1 and 2 of solenoid valves 4 and 5 is based on existing structures.

[0023] The usage process of the diversion valve body between the machine head 10 and the oil-gas separator 9 of this utility model is as follows: During low-frequency constant-pressure gas supply, the diverter valve operates as follows: Figure 2 The main flow channel 3 is normally open, while the first and second flow channels 1 and 2 are normally closed. The oil-gas mixture discharged from the air compressor head 10 enters the flow divider valve body through the oil inlet 6, passes through the flow restriction port 8, and then enters the oil-gas separator through the oil outlet 7. Due to the effect of the flow restriction port 8, the linear velocity of the oil-gas mixture increases after passing through the flow restriction port 8, thus improving the oil-gas separation effect.

[0024] As the demand for air increases, the motor speed increases. The amount of oil-air mixture discharged from the air compressor head 10 increases. Driven by solenoid valve 4, valve core 401 moves, switching the operating state to the lower position. Figure 3 Mainstream channel 3 is always open, diversion channel 1 is open, and diversion channel 2 remains closed.

[0025] At this point, the oil-gas mixture enters the oil-gas separator 9 through two channels via the diversion valve body. One channel continues along the main channel 3, while the other channel passes through the overflow channel and diversion channel 1, merging with the main channel 3 before entering the oil separator together. This ensures both high linear velocity and sufficient flow rate of the oil-gas mixture, achieving a moderate oil-gas separation effect and reducing the oil content in the air.

[0026] As supply and demand continue to increase to the point where the motor operates at full frequency, the diversion valve body, driven by solenoid valve 4 and solenoid valve 5, switches the valve core's movement position to the lower operating state. Figure 4 Mainstream channel 3 is normally open, branch channel 1 is open, and branch channel 2 is open. At this time, the oil-gas mixture enters the oil-gas separator tank through the three channels and the branch valve: the first two channels remain unchanged, and a new channel is added to release the remaining oil-gas mixture into branch channel 2, and then into the mainstream channel 3, where it merges with the oil-gas mixture from the first two channels and enters the oil-gas separator tank 9 together, thereby increasing the flow rate again and ensuring the linear velocity of the oil-gas mixture entering the separator tank.

[0027] The usage process of the diverter valve body at the fuel injector of this utility model is as follows: When supplying air at low frequency and constant pressure, the motor speed is low and the required amount of oil injection is small. Mainstream channel 3 is normally open, while branch channel 1 and branch channel 2 are normally closed.

[0028] As the demand for gas increases and the motor speed increases, a larger amount of fuel injection is required. Mainstream channel 3 is normally open, branch channel 1 is open, and branch channel 2 remains closed.

[0029] As supply and demand continue to increase to the point where the motor operates at full frequency, the required amount of oil injection is greater. Mainstream channel 3 is normally open, diversion channel 1 is open, and diversion channel 2 is open. This changes the situation where the compressor head speed of the traditional permanent magnet variable frequency air compressor decreases, the amount of oil injection remains unchanged, the volumetric efficiency decreases, and the power consumption increases when supplying air at low frequency and constant pressure.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solution of this utility model, and these modifications or equivalent substitutions cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of this utility model.

Claims

1. A permanent magnet variable frequency air compressor structure, characterized in that: Includes a flow divider valve body, one of which is disposed between the engine head and the oil-gas separator, and the other of which is disposed at the engine head injection port; The diverter valve body includes a diverter channel one, a diverter channel two, a main channel, a solenoid valve one, and a solenoid valve two. The main channel is located in the middle of the diverter valve body. The diverter channel one and the diverter channel two are located on both sides of the main channel. The diverter channel one and the diverter channel two are respectively connected to the main channel. An oil inlet and an oil outlet are respectively provided at both ends of the main channel. A solenoid valve is installed in the first diversion channel, and a solenoid valve is installed in the second diversion channel. Three valve cores are fixedly connected to the moving shaft of the solenoid valve, and three valve cores are fixedly connected to the moving shaft of the solenoid valve.

2. The permanent magnet variable frequency air compressor structure according to claim 1, characterized in that: A flow-limiting port is set in the middle of the main channel.

3. The permanent magnet variable frequency air compressor structure according to claim 2, characterized in that: A left connecting channel one and a left connecting channel two are provided between the main channel and the branch channel one.

4. The permanent magnet variable frequency air compressor structure according to claim 3, characterized in that: A right connecting channel one and a right connecting channel two are provided between the main channel and the branch channel two.

5. The permanent magnet variable frequency air compressor structure according to claim 4, characterized in that: The first solenoid valve and the second solenoid valve are electrically connected to the controller. The controller controls the movement of the moving shaft of the first solenoid valve, thereby controlling the three valve cores to simultaneously close or open the left connecting channel one and the left connecting channel two. The controller also controls the movement of the moving shaft of the second solenoid valve, thereby controlling the three valve cores to simultaneously close or open the right connecting channel one and the right connecting channel two.

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