An integrated screw main engine

Abstract

This application provides an integrated screw compressor unit, belonging to the field of air compressor technology, including a main unit housing and a drive motor; the main unit housing has independent compression chambers and oil-gas separation chambers; the main unit housing has an intake channel at the intake end of the compression chamber, which communicates with the outer wall of the main unit housing; the main unit housing has an exhaust channel at the exhaust end of the compression chamber, which communicates with the oil-gas separation chamber; the drive motor housing is integrally formed with the main unit housing; a screw is rotatably installed in the compression chamber, one end of which is connected to the output shaft of the drive motor; the main unit housing has an oil-gas separation port on the side wall above the oil; the main unit housing has an outlet port that communicates with the gas outlet of the oil separator; through the above-mentioned configuration of this application, the oil-gas separation chamber and the compression chamber are integrated into the main unit housing, which not only saves installation space but also saves connecting pipelines, avoids the risk of oil leakage in the connecting pipelines, and improves the sealing and safety of the system.

Description

Technical Field

[0001] This application belongs to the field of air compressor technology, specifically relating to an integrated screw compressor unit. Background Technology

[0002] A screw air compressor is a positive displacement gas compression machine whose working volume rotates. Gas compression is achieved by changes in volume.

[0003] The screw air compressor in the prior art includes a screw compressor, an oil-gas cylinder and an oil filter, with an oil separator core built into the oil-gas cylinder; the screw compressor and the oil-gas cylinder and the oil filter are connected by pipelines.

[0004] In the existing technology, the screw compressor and the oil and gas cylinder are separate units, which require a large space for installation, and there is a risk of oil leakage in the connecting pipeline between the screw compressor and the oil and gas cylinder. Utility Model Content

[0005] This application provides an integrated screw compressor, which aims to solve the problems of the existing technology where the screw compressor and oil cylinder are set up separately, which requires a large installation space and poses a risk of oil leakage in the connecting pipeline between the screw compressor and the oil cylinder.

[0006] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0007] An integrated screw compressor main unit is provided, comprising:

[0008] The main unit housing has an independent compression chamber and an oil-gas separation chamber inside; the main unit housing has an air intake channel at the air intake end of the compression chamber, which is connected to the outer wall of the main unit housing; the main unit housing has an exhaust channel at the exhaust end of the compression chamber, which is connected to the oil-gas separation chamber.

[0009] The drive motor has its housing integrally formed with the main unit housing; a screw is rotatably disposed inside the compression chamber, and one end of the screw is connected to the output shaft of the drive motor;

[0010] The main unit housing has an oil-gas separation port on the side wall above the oil, and an oil separator is installed at the oil-gas separation port; the main unit housing has an outlet that communicates with the gas outlet of the oil separator.

[0011] In one possible implementation, the oil-gas separation chamber is connected to an injection pipe at the location of the exhaust channel, with the injection nozzle of the injection pipe facing the top of the oil-gas separation chamber.

[0012] In one possible implementation, the end of the main housing facing away from the drive motor housing has an opening, and the compression chamber and the oil-gas separation chamber can communicate at the opening.

[0013] A sealing plate is detachably connected to the opening position, which can close the opening of the main unit so that the compression chamber and the oil-gas separation chamber are independent of each other;

[0014] The exhaust passage is disposed on the sealing plate, and the two ends of the exhaust passage are located in the compression chamber and the oil-gas separation chamber, respectively.

[0015] In one possible implementation, the oil separator has a gas outlet and a trace oil outlet, the gas outlet of the oil separator is connected to the gas outlet, and the main housing has an oil discharge channel connected to the trace oil outlet.

[0016] The oil drain channel is connected to the air intake channel via a pipe, and a one-way valve is provided at the connection point between the pipe and the air intake channel.

[0017] In one possible implementation, the screw in the compression chamber is a twin-screw structure, one of which is a drive screw;

[0018] One end of the drive screw is located inside the housing of the drive motor and is connected to the rotor to form the output shaft of the drive motor.

[0019] In one possible implementation, a heat dissipation structure and a frequency converter are also included. The housing of the drive motor is provided with a plurality of heat dissipation fins spaced circumferentially thereon. The heat dissipation structure includes:

[0020] The heat dissipation housing is connected at one end to the heat dissipation fins of the drive motor housing;

[0021] A cooling fan is rotatably mounted inside a heat sink housing; the output shaft of the drive motor is located inside the heat sink housing and is connected to the cooling fan.

[0022] Several heat dissipation plates are arranged at intervals along the circumference of the heat dissipation shell; the heat dissipation shell has ventilation holes at the positions of the heat dissipation plates.

[0023] The frequency converter is located at the end of the heat sink away from the cooling fan.

[0024] In one possible implementation, the frequency converter includes a heat dissipation component and a frequency conversion module, the heat dissipation component being connected to the heat sink plate, and the frequency conversion module being mounted on the heat dissipation component.

[0025] In one possible implementation, the main housing has an intake valve at the location of the intake channel, and the housing of the intake valve is integrally formed with the main housing.

[0026] In one possible implementation, the main housing has a circulation pipe on its side wall within the oil, and an oil filter is connected to the circulation pipe.

[0027] One end of the circulation pipeline is connected to the oil in the oil-gas separation chamber, and the other end of the circulation pipeline is connected to the compression chamber.

[0028] In one possible implementation, a temperature control valve is provided on the circulation pipeline. The temperature control valve has a low-temperature oil outlet and a high-temperature oil outlet, and the low-temperature oil outlet and the high-temperature oil outlet are switched by a valve core.

[0029] The high-temperature oil outlet is connected to a radiator via a pipe, and the radiator is connected to the circulation pipeline via a pipe.

[0030] The drive motor drives the screw to rotate. During the rotation of the screw, the air is compressed. The compressed air and oil-gas mix together and enter the exhaust channel, and finally enter the oil-gas separation chamber.

[0031] Compressed gas in the oil-gas separation chamber enters the oil separator through the oil-gas separation port, achieving the separation of compressed gas and oil. The separated compressed gas is discharged from the gas outlet.

[0032] This application provides an integrated screw compressor unit that, compared with the prior art, integrates the oil-gas separation chamber and the compression chamber on the main unit housing. This not only saves installation space but also eliminates the need for connecting pipelines between the screw compressor unit and the oil-gas cylinder, avoiding the risk of oil leakage from the connecting pipelines and improving the system's sealing and safety. Attached Figure Description

[0033] Figure 1 A schematic diagram of an integrated screw compressor unit provided in an embodiment of this application;

[0034] Figure 2 This is a schematic diagram from another angle of an integrated screw compressor provided in an embodiment of this application;

[0035] Figure 3 A schematic diagram of the main housing and sealing plate portion of an integrated screw compressor provided in an embodiment of this application;

[0036] Figure 4 A schematic diagram of the sealing plate portion of an integrated screw compressor unit provided in an embodiment of this application;

[0037] Figure 5 A cross-sectional view of an integrated screw compressor unit provided in an embodiment of this application;

[0038] Figure 6 A cross-sectional view of an integrated screw compressor provided as an embodiment of this application from another angle;

[0039] Figure 7 for Figure 6 Enlarged diagram of section A in the middle;

[0040] Figure 8 A cross-sectional view of the main housing and sealing plate portion of an integrated screw compressor provided in an embodiment of this application;

[0041] Figure 9 for Figure 8 Enlarged diagram of section B;

[0042] Figure 10 A cross-sectional view of the circulation pipeline section of an integrated screw compressor provided in an embodiment of this application;

[0043] Figure 11 A cross-sectional view of the oil-gas separation port portion of an integrated screw compressor unit provided in an embodiment of this application;

[0044] Figure 12 for Figure 11 Enlarged schematic diagram of section C.

[0045] Explanation of reference numerals in the attached drawings: 1. Main unit housing; 11. Compression chamber; 12. Oil-gas separation chamber; 121. Oil discharge channel; 122. Safety valve; 13. Air intake channel; 131. Check valve; 14. Exhaust channel; 15. Oil-gas separation port; 151. Sleeve; 16. Oil separator; 161. Gas outlet; 162. Micro-oil outlet; 163. Insert; 164. Air guide tube; 165. Annular groove; 17. Air outlet; 18. Cylindrical structure; 19. 1. Opening; 2. Drive motor; 21. Heat sink fins; 3. Screw; 4. Oil injection pipe; 41. Oil injection port; 5. Sealing plate; 6. Intake valve; 7. Heat dissipation structure; 71. Heat sink housing; 72. Cooling fan; 73. Heat sink plate; 74. Rear plate; 75. Guide plate; 8. Frequency converter; 81. Heat dissipation components; 82. Frequency converter module; 9. Circulation pipeline; 91. Oil filter; 92. Temperature control valve; 921. High temperature oil outlet; 922. Oil inlet; 93. Notch. Detailed Implementation

[0046] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0047] Please refer to the following: Figures 1 to 12This application describes an integrated screw compressor. The integrated screw compressor includes a main housing 1 and a drive motor 2. The main housing 1 has an independent compression chamber 11 and an oil-gas separation chamber 12. The main housing 1 has an intake channel 13 at the intake end of the compression chamber 11, which communicates with the outer wall of the main housing 1. The main housing 1 has an exhaust channel 14 at the exhaust end of the compression chamber 11, which communicates with the oil-gas separation chamber 12. The housing of the drive motor 2 is integrally formed with the main housing 1. A screw 3 is rotatably mounted inside the compression chamber 11, and one end of the screw 3 is connected to the output shaft of the drive motor 2. The main housing 1 has an oil-gas separation port 15 on the side wall above the oil, and an oil separator 16 is located at the oil-gas separation port 15. The main housing 1 has an outlet 17 communicating with the gas outlet of the oil separator 16.

[0048] The integrated screw compressor provided in this application integrates the oil-gas separation chamber 12 and the compression chamber 11 on the main unit housing 1, which not only saves installation space, but also saves the connecting pipeline between the screw compressor and the oil-gas cylinder, avoids the risk of oil leakage in the connecting pipeline, and improves the sealing and safety of the system.

[0049] For example, the screw 3 inside the compression chamber 11 is a twin-screw structure, one of which is a drive screw 3. One end of the drive screw 3 is located inside the housing of the drive motor 2 and is connected to the rotor to form the output shaft of the drive motor 2. By integrally molding the housing of the drive motor 2 with the main housing 1, and using a portion of the drive screw 3 as the output shaft of the drive motor 2, compared to the separate arrangement in the prior art, this application can ensure the coaxiality of the drive screw 3 and the output shaft of the drive motor 2. The principle of twin-screw air compression is prior art and will not be described in detail here.

[0050] In some embodiments, such as Figures 1 to 12 As shown, the oil-gas separation chamber 12 is connected to the exhaust channel 14 by an injection pipe 4, and the injection port of the injection pipe 4 faces the top of the oil-gas separation chamber 12.

[0051] After the screw 3 compresses the air, the compressed air and oil mix together and enter the exhaust channel 14, and finally enter the fuel injection pipe 4. The fuel injection pipe 4 has a strip-shaped fuel injection nozzle 41 facing upward. The fuel injection pipe 4 is located at the bottom of the outer peripheral wall of the compression chamber 11. After the compressed gas and oil are sprayed out from the fuel injection pipe 4, the compressed gas and oil are sprayed towards the outer peripheral wall of the compression chamber 11. Some of the oil falls down from the outer peripheral wall of the compression chamber 11 and into the oil below.

[0052] The oil separator 16 can separate the oil that enters the oil-gas separation port 15 along with the compressed air, and the separated compressed air is finally discharged from the air outlet 17.

[0053] By installing an oil injection pipe 4 inside the oil-gas separation chamber 12 with the injection nozzle of the oil injection pipe 4 facing upward, the compressed air entering the oil-gas separation chamber 12 can be guided, reducing the situation where the compressed air discharged from the exhaust channel 14 blows directly onto the oil at the bottom of the oil-gas separation chamber 12.

[0054] For example, a cylindrical structure 18 is integrally formed inside the main housing 1. The area enclosed by the cylindrical structure 18 is the compression chamber 11, and the area between the cylindrical structure 18 and the inner peripheral wall of the main housing 1 is the oil-gas separation chamber 12.

[0055] In some embodiments, such as Figures 1 to 12 As shown, the main housing 1 has an opening 19 at the end opposite to the drive motor 2 housing, and the compression chamber 11 and the oil-gas separation chamber 12 can communicate at the opening 19 position; a sealing plate 5 is detachably connected at the opening 19 position, and the sealing plate 5 can close the opening 19 of the main housing so that the compression chamber 11 and the oil-gas separation chamber 12 are independent of each other; the exhaust channel 14 is provided on the sealing plate 5, and the two ends of the exhaust channel 14 are located in the compression chamber 11 and the oil-gas separation chamber 12 respectively.

[0056] The end of the cylindrical structure 18 is coplanar with the opening 19 end of the main housing 1. The sealing plate 5 is connected to the opening 19 end of the main housing 1 by bolts. There is a sealing ring between the sealing plate 5 and the main housing 1 to seal the connection position between the sealing plate 5 and the main housing 1.

[0057] By setting an exhaust channel 14 on the sealing plate 5, after the sealing plate 5 is fixed on the main housing 1, one end of the exhaust channel 14 is connected to the exhaust end of the compression chamber 11, and the other end of the exhaust channel 14 is connected to the oil-gas separation chamber 12.

[0058] For example, the main housing 1 is provided with an intake valve 6 at the position of the intake channel 13. The outer shell of the intake valve 6 is integrally formed with the main housing 1, which makes the processing more convenient and the structure simpler.

[0059] In some embodiments, such as Figures 1 to 12 As shown, the oil separator 16 has a gas outlet 161 and a trace oil outlet 162. The gas outlet 161 of the oil separator 16 is connected to the air outlet 17. The main housing 1 has an oil discharge channel 121 connected to the trace oil outlet 162. The oil discharge channel 121 is connected to the air intake channel 13 through a pipe, and a one-way valve 131 is provided at the position where the pipe connects to the air intake channel 13.

[0060] The oil separator 16 has a tube 163 and an air guide tube 164. The air guide tube 164 is inserted into the tube 163 and fixed at the bottom of the tube 163. There is a gap between the air guide tube 164 and the tube 163 for oil to pass through. The tube 163 has an annular groove 165 near the bottom and a through hole at the position of the annular groove 165. The through hole communicates with the oil discharge channel 121.

[0061] The bottom wall of the oil-gas separator 15 has a sleeve 151, and the insert 163 is inserted into the sleeve 151. The outer peripheral wall of the insert 163 is provided with sealing rings on the upper and lower sides corresponding to the annular groove 165 to achieve a sealing effect. The sleeve 151 also has an annular groove 165 corresponding to the annular groove 165 of the insert 163. The annular groove 165 on the sleeve 151 is connected to the oil drain channel 121. The connection between the insert 163 and the sleeve 151 can be a threaded connection.

[0062] The filtration principle of the oil separator 16 is existing technology, and the connection and sealing methods between the oil separator 16 and the oil-gas separation port 15 are also existing technologies, which will not be described in detail here. The oil separator 16 in the attached figure is only a schematic diagram, which only shows the key components. The rest are existing components and are not shown in the figure.

[0063] With the above-mentioned configuration of this application, the oil in the oil drain channel 121 can enter the air intake channel 13 after passing through the pipeline and the one-way valve 131.

[0064] In some embodiments, such as Figures 1 to 12 As shown, it also includes a heat dissipation structure 7 and a frequency converter 8. The housing of the drive motor 2 is provided with a plurality of heat dissipation fins 21 spaced apart along its circumference. The heat dissipation structure 7 includes a heat dissipation shell 71, a cooling fan 72 and a plurality of heat dissipation plates 73. One end of the heat dissipation shell 71 is connected to the heat dissipation fins 21 on the housing of the drive motor 2. The cooling fan 72 is rotatably disposed inside the heat dissipation shell 71. The output shaft of the drive motor 2 is located inside the heat dissipation shell 71 and is connected to the cooling fan 72. A plurality of heat dissipation plates 73 are spaced apart along the circumference of the heat dissipation shell 71. The heat dissipation shell 71 has ventilation holes at the positions of the heat dissipation plates 73. The frequency converter 8 is disposed at the end of the heat dissipation plate 73 away from the cooling fan 72.

[0065] Several heat sinks 73 are fixed on the rear plate 74, which is fixed inside the heat sink housing 71. The inner peripheral wall of the rear plate 74 is sealed to the outer peripheral wall of the heat sink housing 71. The heat sinks 73 form a circular cavity in the central area of ​​the rear plate 74, allowing air to move from two adjacent heat sinks 73 into the circular cavity in the middle of the rear plate 74.

[0066] A guide plate 75 is provided between the heat sink 73 and the fan. The guide plate 75 has a guide hole in the middle, which is aligned with the circular cavity of the rear plate 74. The guide plate 75 has a conical structure. The small end of the guide plate 75 is fixed on the heat sink 73, and the large end of the guide plate 75 is close to the inner peripheral wall of the heat sink housing 71.

[0067] When the output shaft of the drive motor 2 rotates, it can drive the fan to rotate. During the rotation of the fan, it can guide the airflow in the heat sink 71, so that the external air enters the heat sink 71 through the vent. The air moves along the two adjacent heat sinks 73 and eventually moves to the middle position. The air in the middle position passes through the guide plate 75 and moves in all directions towards the inner peripheral wall of the heat sink 73, and finally blows out from the heat sink fins 21 of the drive motor 2 housing.

[0068] The above settings can effectively cool the drive motor 2; the frequency converter 8 is mounted on the rear plate 74, and the frequency converter 8 and the heat sink 73 are located on the two sides of the rear plate 74 respectively. Therefore, the frequency converter 8 will not affect the airflow direction inside the heat sink 73, and the rear plate 74 can also play a role in heat exchange for the frequency converter 8.

[0069] In some embodiments, such as Figures 1 to 12 As shown, the frequency converter 8 includes a heat dissipation component 81 and a frequency conversion module 82. The heat dissipation component 81 is connected to the heat dissipation plate 73, and the frequency conversion module 82 is mounted on the heat dissipation component 81.

[0070] The heat dissipation component 81 is mounted on the rear plate 74, and heat exchange can be performed between the rear plate 74 and the heat dissipation component 81, thereby dissipating heat from the frequency converter module 82 and reducing the temperature of the frequency converter module 82; the working principle of the frequency converter module 82 is existing technology and will not be described in detail here.

[0071] In some embodiments, such as Figures 1 to 12 As shown, the main housing 1 has a circulation pipe 9 on the side wall inside the oil, and an oil filter 91 is connected to the circulation pipe 9; wherein, one end of the circulation pipe 9 is connected to the oil in the oil-gas separation chamber 12, and the other end of the circulation pipe 9 is connected to the compression chamber 11.

[0072] The oil-gas separation chamber 12 has a certain pressure. Under pressure, the oil in the oil-gas separator enters the circulation pipeline 9 and then flows into the compression chamber 11 after passing through the oil filter 91, forming a small circulation.

[0073] In some embodiments, such as Figures 1 to 12As shown, a temperature control valve 92 is installed on the circulation pipeline 9. The temperature control valve 92 has a low-temperature oil outlet and a high-temperature oil outlet 921, which are switched by a valve core. The high-temperature oil outlet 921 is connected to a radiator (not shown in the figure) through a pipe. The radiator is connected to the circulation pipeline 9 through a pipe, and the connection point is the oil inlet 922. The radiator is existing technology, and the working principle of the temperature control valve 92 is existing technology, which will not be described in detail here.

[0074] In the attached diagram, the high-temperature oil outlet 921 and the oil inlet 922 are sealed with bolts, indicating that they are not in use. When installation is required, the bolts on the high-temperature oil outlet 921 and the oil inlet 922 are unscrewed. The high-temperature oil outlet 921 is connected to the radiator through a pipe, and the oil outlet pipe on the radiator is connected to the oil inlet 922.

[0075] The bottom of the oil-gas separation chamber 12 has a notch 93 that communicates with the oil inlet of the temperature control valve 92, so that the oil in the oil-gas separation chamber 12 can enter the temperature control valve 92 through the notch 93. It should be noted that the oil level in the oil-gas separation chamber 12 is higher than the oil inlet of the temperature control valve 92, so that the oil inlet of the temperature control valve 92 can be submerged in the oil.

[0076] When the oil temperature in the oil-gas separation chamber 12 is below 60 degrees, the valve core of the temperature control valve 92 opens the low-temperature oil outlet and closes the high-temperature oil outlet 921; the circulation pipeline 9 is connected to the low-temperature oil outlet, and the oil in the oil-gas separation chamber 12 enters the circulation pipeline 9 from the low-temperature oil outlet, and enters the compression chamber 11 after passing through the oil filter 91.

[0077] When the oil temperature in the oil-gas separation chamber 12 is higher than 60 degrees, the valve core of the temperature control valve closes the low-temperature oil outlet and opens the high-temperature oil outlet. The oil in the oil-gas separation chamber 12 enters the radiator from the high-temperature oil outlet 921. After being cooled by the radiator, it enters the circulation pipeline 9 from the oil inlet 922 and then passes through the oil filter 91 before entering the compression chamber 11 to form a large circulation.

[0078] The main housing 1 has a safety valve 122 at the top of the oil-gas separation chamber 12. When the pressure in the oil-gas separation chamber 12 exceeds the pressure that the safety valve 122 can withstand, the safety valve 122 opens to achieve the purpose of pressure relief.

[0079] By integrating the oil filter 91 and the oil-gas separation chamber 12 onto the screw compressor, installation space can be further saved, the pipeline connection between the oil filter 91 and the oil-gas separation chamber 12 can be reduced, the risk of oil leakage can be reduced, and the structure can be made more compact.

[0080] The frequency converter 8 is integrated into the screw compressor, making the debugging of the frequency converter 8 and the motor more convenient and the matching degree between the two higher, ensuring that the equipment operates more smoothly and efficiently.

[0081] The frequency converter 8 is integrated into the screw compressor, making the heat dissipation structure 7 simpler. The cooling fan 72 of the frequency converter 8 is eliminated, and the motor cooling fan 72 directly dissipates heat. This not only simplifies the heat dissipation system but also reduces noise, making the structural design of the frequency converter 8 simpler and extending its service life.

[0082] The frequency converter 8 is integrated into the screw compressor unit. The frequency converter 8 has a higher protection level, optimizes the overall structure, and effectively reduces manufacturing and maintenance costs.

[0083] Working principle: The output shaft of the drive motor 2 drives the drive screw 3 to rotate. The meshing of the twin screws 3 can compress the air. External air enters the intake passage 13 from the intake valve 6, is compressed by the twin screws 3 and discharged into the exhaust passage 14. The compressed air and oil entering the exhaust passage 14 are blown from the oil injection port 41 of the oil injection pipe 4 to the bottom of the cylindrical structure 18. Some of the oil can remain on the outer peripheral wall of the cylindrical structure 18 and eventually fall down from the outer peripheral wall of the cylindrical structure 18 into the oil below.

[0084] The compressed air in the oil-gas separation chamber 12 moves upward to the oil-gas separation port 15, and the oil and compressed air are separated by the oil separator 16, so that the compressed gas enters the air guide cylinder 164 and is discharged from the gas outlet 161 of the oil separator 16. The discharged compressed gas is discharged from the air outlet 17 on the main unit housing 1.

[0085] A small amount of oil on the outer peripheral wall of the air guide cylinder 164 can flow downward into the gap between the insert cylinder 163 and the air guide cylinder 164, and finally flow into the annular groove 165; the oil in the annular groove 165 is discharged from the through hole and enters the annular groove 165 in the sleeve 151. The oil in the annular groove 165 in the sleeve 151 can enter the oil discharge channel 121 and finally be discharged into the air intake channel 13 through the pipe.

[0086] By installing a one-way valve 131 on the intake passage 13, the flow direction of the one-way valve 131 is from the outside to the inside of the intake passage 13, so that the oil in the drain passage 121 can flow into the intake passage 13, and the air in the intake passage 13 will not enter the drain passage 121.

[0087] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An integrated screw compressor, characterized in that, include: The main unit housing contains independent compression chambers and oil-gas separation chambers. The main housing has an air intake channel at the air intake end of the compression chamber, and the air intake channel is connected to the outer side wall of the main housing; the main housing has an exhaust channel at the exhaust end of the compression chamber, which is connected to the oil-gas separation chamber. The drive motor has its housing integrally formed with the main unit housing; a screw is rotatably disposed inside the compression chamber, and one end of the screw is connected to the output shaft of the drive motor; The main unit housing has an oil-gas separation port on the side wall above the oil, and an oil separator is installed at the oil-gas separation port; the main unit housing has an outlet that communicates with the gas outlet of the oil separator.

2. The integrated screw compressor as described in claim 1, characterized in that, The oil-gas separation chamber is connected to an oil injection pipe at the location of the exhaust channel, and the injection nozzle of the oil injection pipe faces the top of the oil-gas separation chamber.

3. The integrated screw compressor as described in claim 1, characterized in that, The main housing has an opening at the end opposite to the drive motor housing, and the compression chamber and the oil-gas separation chamber can be connected at the opening. A sealing plate is detachably connected to the opening position, which can close the opening of the main unit so that the compression chamber and the oil-gas separation chamber are independent of each other; The exhaust passage is disposed on the sealing plate, and the two ends of the exhaust passage are located in the compression chamber and the oil-gas separation chamber, respectively.

4. The integrated screw compressor as described in claim 1, characterized in that, The oil separator has a gas outlet and a trace oil outlet. The gas outlet of the oil separator is connected to the gas outlet. The main housing has an oil discharge channel connected to the trace oil outlet. The oil drain channel is connected to the air intake channel via a pipe, and a one-way valve is provided at the connection point between the pipe and the air intake channel.

5. An integrated screw compressor as described in claim 1, characterized in that, The screw inside the compression chamber has a twin-screw structure, one of which is a drive screw; One end of the drive screw is located inside the housing of the drive motor and is connected to the rotor to form the output shaft of the drive motor.

6. An integrated screw compressor as described in claim 1, characterized in that, It also includes a heat dissipation structure and a frequency converter. The housing of the drive motor is provided with a plurality of heat dissipation fins spaced circumferentially. The heat dissipation structure includes: The heat dissipation housing is connected at one end to the heat dissipation fins of the drive motor housing; A cooling fan is rotatably mounted inside a heat sink housing; the output shaft of the drive motor is located inside the heat sink housing and is connected to the cooling fan. Several heat dissipation plates are arranged at intervals along the circumference of the heat dissipation shell; the heat dissipation shell has ventilation holes at the positions of the heat dissipation plates. The frequency converter is located at the end of the heat sink away from the cooling fan.

7. An integrated screw compressor as described in claim 6, characterized in that, The frequency converter includes a heat dissipation component and a frequency conversion module. The heat dissipation component is connected to the heat dissipation plate, and the frequency conversion module is mounted on the heat dissipation component.

8. An integrated screw compressor as described in claim 1, characterized in that, The main unit housing has an intake valve at the intake channel position, and the housing of the intake valve is integrally formed with the main unit housing.

9. An integrated screw compressor as described in claim 1, characterized in that, The main unit housing has a circulation pipe on the side wall inside the oil, and an oil filter is connected to the circulation pipe; One end of the circulation pipeline is connected to the oil in the oil-gas separation chamber, and the other end of the circulation pipeline is connected to the compression chamber.

10. An integrated screw compressor as described in claim 9, characterized in that, A temperature control valve is installed on the circulation pipeline. The temperature control valve has a low-temperature oil outlet and a high-temperature oil outlet, which are switched by a valve core. The high-temperature oil outlet is connected to a radiator via a pipe, and the radiator is connected to the circulation pipeline via a pipe.

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