Cooling system integrated screw compressor

Abstract

The invention discloses a screw compressor with an integrated cooling system. The screw compressor comprises an air compression assembly, a driving assembly, an air inlet assembly and a variable frequency speed regulation assembly. A male rotor and a female rotor which are meshed with each other are arranged in the air compression assembly; the driving assembly comprises a motor cylinder, a driving motor, a first cooling fin and a second cooling fin; the driving motor is arranged in the motor cylinder and is connected with the male rotor; the bottom of the motor cylinder is provided with a first heat dissipation channel, and the top is provided with a second heat dissipation channel. The first radiating fin is arranged at the bottom of the motor cylinder and is arranged in the first radiating channel; the second radiating fin is arranged at the top of the motor cylinder and is arranged in the second radiating channel; the air inlet assembly is mounted on the right side of the driving assembly; the variable frequency speed regulation assembly is arranged above the driving assembly and the air inlet assembly and comprises a radiator arranged at the bottom of the shell, and the radiator is arranged in the second heat dissipation channel. Through the arrangement, the screw compressor is higher in integration level and better in heat dissipation effect.

Description

Technical Field

[0001] The present invention relates to the technical field of screw compressors, and in particular to a screw compressor with an integrated cooling system. Background Art

[0002] The cooling system of the screw machine permanent magnet synchronous drive motor is an important component to ensure the stable operation of the motor and the variable frequency speed regulator. The drive of permanent magnet synchronous motor is usually realized by variable frequency speed regulator, but when the variable frequency speed regulator runs at rated current, it will generate a lot of heat energy, accounting for about 3% of the rated power consumption of permanent magnet synchronous motor. The current cooling method is to use the axial flow fan of the variable frequency speed regulator to dissipate heat. However, the efficiency of this axial flow fan is low, and its cooling effect cannot meet the demand for efficient heat dissipation, resulting in the difficulty of fully cooling the variable frequency speed regulator and permanent magnet synchronous motor. As a result, the overall operating efficiency of the equipment is reduced, the internal temperature is high, and the reliability of system operation is reduced. Summary of the invention

[0003] In order to solve the deficiencies of the prior art, an object of the present invention is to provide a screw compressor with an integrated cooling system having a better heat dissipation effect.

[0004] Based on the above purpose, the present invention adopts the following technical solution: A screw compressor with an integrated cooling system comprises: an air compression component, a drive component, an intake component and a variable frequency speed regulation component; a male rotor and a female rotor meshing with each other are provided in the air compression component; the rotating shafts of the male rotor and the female rotor both extend in the left-right direction; the drive component is arranged on the right side of the air compression component, and comprises a motor barrel, a drive motor, a first heat sink and a second heat sink; the drive motor is at least partially arranged in the motor barrel, connected to the male rotor, and can drive the male rotor to rotate; a first heat dissipation channel is provided at the bottom of the motor barrel, and a second heat dissipation channel is provided at the top; the first heat sink is arranged at the bottom of the motor barrel, close to the drive motor, and at least partially arranged in the first heat dissipation channel; the second heat sink is arranged at the top of the motor barrel, close to the drive motor, and at least partially arranged in the second heat dissipation channel; the intake component comprises a cover body, a rotating shaft and a centrifugal impeller; the cover body is arranged in the motor barrel The right side of the housing has an air inlet at the right end; the centrifugal impeller is at least partially arranged in the housing; the rotating shaft extends in the left and right directions, is connected to the centrifugal impeller, and is penetrated by the motor cylinder and connected to the drive motor; the drive motor can drive the centrifugal impeller to rotate through the rotating shaft; the first heat dissipation channel and the second heat dissipation channel are both connected to the inside of the housing; the variable frequency speed regulation component is at least partially arranged above the drive component and the air intake component, including a housing, an IGBT module and a radiator; the IGBT module is at least partially arranged at the bottom of the inner cavity of the housing; the radiator is arranged at the bottom of the housing, close to the IGBT module, and at least partially arranged in the second heat dissipation channel.

[0005] Furthermore, the shell includes an upper shell, a lower shell, a first sealing step surface and a second sealing step surface; the front ends of the upper shell and the lower shell are connected by the first sealing step surface to form a sealing structure; the rear ends of the upper shell and the lower shell are connected by the second sealing step surface to form a sealing structure.

[0006] Furthermore, a gap D1 between the first sealing step surface between the upper shell and the lower shell is less than or equal to 1 mm; a gap D2 between the second sealing step surfaces between the upper shell and the lower shell is less than or equal to 1 mm.

[0007] Furthermore, a liquid crystal display driving board is provided on the top of the upper shell, and a display screen mask is covered on the liquid crystal display driving board.

[0008] Furthermore, the lower shell is made of plastic, and the IGBT module is made of metal material; a hard-soft sealing structure is formed between the lower shell and the IGBT module to prevent water vapor and dust from entering the variable frequency speed regulation component from the drive component.

[0009] Furthermore, a lead-out module is provided at the rear end of the lower shell; the lead-out module includes a lead-out wire 1641 connecting the internal and external circuits of the variable frequency speed regulation component and a sealing sleeve covering the lead-out wire 1641; a sealing ring is provided at the connection between the sealing sleeve and the lower shell and is sleeved on the sealing sleeve.

[0010] Furthermore, the variable frequency speed regulation component also includes a rectifier module and an inverter drive PCB board; the inverter drive PCB board is at least partially arranged in the shell and connected to the IGBT module through the rectifier module.

[0011] Furthermore, the drive motor includes a first operating speed and a second operating speed; when the variable frequency speed regulation component is operating at rated load, the drive motor is at the first operating speed; when the load of the air compression component changes and the operating load of the rectifier module and the IGBT module changes accordingly, the variable frequency speed regulation component controls the drive motor to be at the second operating speed; the ratio of the difference between the second operating speed and the first operating speed to the operating load change value of the rectifier module and the IGBT module is the variation coefficient k.

[0012] Furthermore, an air guide cover is provided above the air inlet, and an air guide plate is provided at one end of the bottom of the variable frequency speed regulation assembly close to the air guide cover, and an air guide channel is formed between the air guide plate and the air guide cover; air can flow into the cover body from the air inlet, be guided by the air guide cover and the air guide plate, and flow into the second heat dissipation channel from the air guide channel.

[0013] Furthermore, the air inlet is an air inlet louver window.

[0014] The above-mentioned cooling system integrates an integrated screw compressor, which realizes the integration of efficient heat dissipation and high-performance drive by integrating the drive component, air intake component and variable frequency speed regulation component into an integrated design and optimizing the layout structure of the heat dissipation channel and components. It solves the problems of complex structure and low heat dissipation efficiency of traditional screw compressors, and at the same time improves the integration and operational reliability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a cross-sectional view of a screw compressor provided according to the present invention; Figure 2 yes Figure 1 A partial enlarged view of the middle A; Figure 3 yes Figure 1 A partial enlarged view of point B in the middle. DETAILED DESCRIPTION

[0016] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] At the same time, in order to clearly explain the technical solution of this application, the following is also defined: Figure 1 Top, bottom, left and right sides shown.

[0018] like Figure 1 As shown, the present application provides a screw compressor with integrated cooling system. The screw compressor includes an air compression component 11, a drive component 12, an air intake component 15 and a variable frequency speed regulation component 16.

[0019] Specifically, a male rotor 111 and a female rotor meshing with each other are provided in the air compression assembly 11 for compressing air. The rotating shafts of the male rotor 111 and the female rotor both extend in the left-right direction.

[0020] The drive assembly 12 is arranged on the right side of the air compression assembly 11, and includes a motor barrel 121, a drive motor 122, a first heat sink 123 and a second heat sink 124. Among them, the motor barrel 121 is used to protect the internal parts of the drive assembly 12. The drive motor 122 is at least partially arranged in the motor barrel 121, connected to the male rotor 111, and can drive the male rotor 111 to rotate. The bottom of the motor barrel 121 is provided with a first heat dissipation channel 13, and the top is provided with a second heat dissipation channel 14. Specifically, the first heat sink 123 is arranged at the bottom of the motor barrel 121, close to the drive motor 122, and at least partially arranged in the first heat dissipation channel 13. The second heat sink 124 is arranged at the top of the motor barrel 121, close to the drive motor 122, and at least partially arranged in the second heat dissipation channel 14. The first heat sink 123 / the second heat sink 124 is used to exchange heat with the cold air in the first heat dissipation channel 13 / the second heat dissipation channel 14 to dissipate heat from the stator heating element in the drive motor 122.

[0021] The air intake assembly 15 includes a cover 151, a rotating shaft 152 and a centrifugal impeller 153. The cover 151 is arranged on the right side of the motor barrel 121, and an air inlet 154 is provided at the right end. Among them, the centrifugal impeller 153 is at least partially arranged in the cover 151. The rotating shaft 152 extends in the left-right direction, is connected with the centrifugal impeller 153, passes through the motor barrel 121 and is connected with the drive motor 122. The first heat dissipation channel 13 and the second heat dissipation channel 14 are both connected with the inside of the cover 151. The drive motor 122 can drive the centrifugal impeller 153 to rotate through the rotating shaft 152, and form wind flow and wind pressure in the cover 151, so that external cold air can flow in from the air inlet 154, flow through the first heat dissipation channel 13 and the second heat dissipation channel 14, and exchange heat with the first heat dissipation fin 123 and the second heat dissipation fin 124, so as to ensure the stable operation of the drive assembly 12.

[0022] The variable frequency speed regulation component 16 is at least partially arranged above the drive component 12 and the air intake component 15, and includes a housing 161, an IGBT module 162 and a radiator 163. The IGBT module 162 is at least partially arranged at the bottom of the inner cavity of the housing 161. The radiator 163 is arranged at the bottom of the housing 161, close to the IGBT module 162, and at least partially arranged in the second heat dissipation channel 14. When the cold air flows through the second heat dissipation channel 14, it can exchange heat with the radiator 163 and the second heat sink 124 at the same time, thereby improving the heat dissipation efficiency of the variable frequency speed regulation component 16; at the same time, it reduces the investment in independent axial fans in the variable frequency speed regulation component 16, and reduces the power consumption and cost of the screw compressor; in addition, the heat dissipation structure is highly compact, which improves the space utilization of the screw compressor.

[0023] Through the above-mentioned settings, the screw compressor integrates the drive component 12, the air intake component 15 and the variable frequency speed control component 16, and optimizes the layout structure of the heat dissipation channel and the components, realizing the integration of efficient heat dissipation and high-performance drive, solving the problems of complex structure and low heat dissipation efficiency of traditional screw compressors, and improving the integration and operation reliability of the equipment. At the same time, the traditional screw compressor uses a motor air guide cover for diversion, while the air intake component 15 of the present application is independently set up with the drive component 12, and the air guide cover 155 of the air intake component 15 is used for diversion, avoiding the phenomenon of air leakage and uneven air volume in the equipment during heat exchange.

[0024] like Figure 1 As shown, the housing 161 includes an upper housing 1611, a lower housing 1612, a first sealing step surface 1613, and a second sealing step surface 1614. Specifically, the front ends of the upper housing 1611 and the lower housing 1612 are connected through the first sealing step surface 1613 to form a sealing structure. The rear ends of the upper housing 1611 and the lower housing 1612 are connected through the second sealing step surface 1614 to form a sealing structure. This prevents oil, water, dust, metal shavings, etc. at the work site from entering the variable frequency speed regulator and damaging electrical components.

[0025] like Figures 2 to 3 As shown, the gap D1 of the first sealing step surface 1613 between the upper shell 1611 and the lower shell 1612 is less than or equal to 1 mm. The gap D2 between the second sealing step surfaces 1614 between the upper shell 1611 and the lower shell 1612 is less than or equal to 1 mm. Through the above settings, the variable frequency speed regulator has a high protection level, can effectively prevent solid objects with a diameter greater than 1 mm from entering, prevent splashing water droplets and dust from entering, and can be used in application scenarios in harsh environments.

[0026] like Figure 1 As shown, a liquid crystal display driving board 1614 is disposed on the top of the upper shell 1611 , and a display screen mask 1615 is covered on the liquid crystal display driving board 1614 to achieve waterproof and dustproof properties.

[0027] Specifically, the lower shell 1612 is made of plastic, and the IGBT module 162 is made of metal. A hard and soft sealing structure is formed between the lower shell 1612 and the IGBT module 162 to prevent water vapor and dust from entering the variable frequency speed regulation component 16 from the drive component 12. At the same time, the hard and soft sealing structure can reduce the use of additional sealing structures and reduce material costs. In addition, the hard and soft sealing structure can also be replaced by deformation caused by mechanical vibration and thermal expansion, further improving the stability of the connection between the lower shell 1612 and the IGBT module 162.

[0028] More specifically, the rear end of the lower shell 1612 is provided with a lead module 164. The lead module 164 includes a lead wire 1641 connecting the internal and external circuits of the variable frequency speed regulation assembly 16 and a sealing sleeve 1642 covering the lead wire 1641, which is used to improve the sealing effect of the lead module 164. A sealing ring 1643 is provided at the connection between the sealing sleeve 1642 and the lower shell 1612, which is sleeved on the sealing sleeve 1642, which is used to improve the sealing effect of the connection between the lead module 164 and the lower shell 1612.

[0029] Furthermore, the variable frequency speed regulation component 16 also includes a rectifier module 165 and an inverter drive PCB board 166. The inverter drive PCB board 166 is at least partially disposed in the housing 161 and is connected to the IGBT module 162 through the rectifier module 165. During operation, the current is inverted and rectified by the inverter drive PCB board 166 and the rectifier module 165 and then reaches the IGBT module 162 to drive the IGBT module 162 to operate. In the above process, electrical energy is converted into thermal energy, which is exchanged and dissipated by the radiator 163 in the second heat dissipation channel 14.

[0030] The variable frequency speed regulating assembly 16 also includes a control module 167. The control module 167 is disposed in the housing 161, connected to the housing 161 through a number of support members, and electrically connected to the inverter drive PCB board 166, the rectifier module 165, and the IGBT module 162. The connection between the control module 167, the inverter drive PCB board 166, the rectifier module 165, and the IGBT module 162 and the housing 161 is treated with waterproof and dustproof treatment, so that the variable frequency speed regulator obtains a better protection effect.

[0031] Through the above arrangement, the assembly accuracy of the variable frequency speed regulating assembly 16 is higher, and the protection level reaches IP54, which can prevent 1 mm solid from entering the housing 161. At the same time, each electrical component in the housing 161 and each contact surface of the housing 161 are sealed against water and dust, further improving the protection effect of the variable frequency speed regulating assembly 16.

[0032] Furthermore, the drive motor 122 includes a first operating speed and a second operating speed. When the variable frequency speed regulation component 16 is operating at rated load, the drive motor 122 is at the first operating speed. When the load of the air compression component 11 changes, and the operating load of the rectifier module 165 and the IGBT module 162 changes accordingly, the variable frequency speed regulation component 16 controls the drive motor 122 to be at the second operating speed. The ratio of the difference between the second operating speed and the first operating speed to the operating load change value of the rectifier module 165 and the IGBT module 162 is the variation coefficient k. Among them, the variation coefficient k is determined according to the heat exchange efficiency and heat dissipation area of ​​the radiator 163. When the drive motor 122 is at the second operating speed, the air volume of the cold air introduced by the air intake component 15 and the generated wind pressure can control the temperature of the variable frequency speed regulator to a controllable optimal state.

[0033] like Figure 1 As shown, an air guide cover 155 is provided above the air inlet 154, and an air guide plate 156 is provided at one end of the bottom of the variable frequency speed regulation component 16 near the air guide cover 155, and an air guide channel 157 is formed between the air guide plate 156 and the air guide cover 155. Cold air flows in from the air inlet 154, and forms air volume and pressure in the cover body 151 after being guided by the air guide cover 155, and flows into the second heat dissipation channel 14 through the air guide channel 157 after secondary guidance through the air guide plate 156. Through secondary guidance, the air flow direction and wind pressure distribution can be optimized, the leakage of cold air can be reduced, and the flow stability of cold air in the cover body 151 and the second heat dissipation channel 14 can be improved, thereby ensuring the heat dissipation efficiency of the drive component 12 and the variable frequency speed regulation component 16.

[0034] Specifically, the air inlet 154 is an air inlet louver window to prevent dust or impurities from entering the cover body 151; at the same time, the introduction direction of the cold air is optimized to ensure that the cold air can flow into the cover body 151 evenly and stably.

[0035] The above is a description of the embodiments of the present invention. Through the above description of the disclosed embodiments, professionals and technicians in the field can implement or use the present invention. Various modifications to these embodiments will be apparent to professionals and technicians in the field. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown in this article, but will conform to the widest range consistent with the principles and novelties disclosed herein.

Claims

1. A screw compressor with integrated cooling system, comprising: An air compression assembly (11), wherein a male rotor (111) and a female rotor meshing with each other are provided in the air compression assembly (11); The rotation axes of the male rotor (111) and the female rotor both extend in the left-right direction; Characterized in that the screw compressor also includes: A drive assembly (12), the drive assembly (12) being arranged on the right side of the air compression assembly (11), comprising a motor barrel (121), a drive motor (122), a first heat sink (123), and a second heat sink (124); the drive motor (122) being at least partially arranged in the motor barrel (121), connected to the male rotor (111), and capable of driving the male rotor (111) to rotate; a first heat dissipation channel (13) being arranged at the bottom of the motor barrel (121), and a second heat dissipation channel (14) being arranged at the top; the first heat sink (123) being arranged at the bottom of the motor barrel (121), being arranged close to the drive motor (122), and being at least partially arranged in the first heat dissipation channel (13); and the second heat sink (124) being arranged at the top of the motor barrel (121), being arranged close to the drive motor (122), and being at least partially arranged in the second heat dissipation channel (14); An air intake assembly (15), the air intake assembly (15) comprising a cover body (151), a rotating shaft (152) and a centrifugal impeller (153); the cover body (151) is arranged on the right side of the motor barrel (121), and an air inlet (154) is provided at the right end; the centrifugal impeller (153) is at least partially arranged in the cover body (151); the rotating shaft (152) extends in the left-right direction, is connected to the centrifugal impeller (153), passes through the motor barrel (121) and is connected to the drive motor (122); the drive motor (122) can drive the centrifugal impeller (153) to rotate through the rotating shaft (152); the first heat dissipation channel (13) and the second heat dissipation channel (14) are both connected to the interior of the cover body (151); A variable frequency speed regulation component (16), the variable frequency speed regulation component (16) being at least partially arranged above the drive component (12) and the air intake component (15), comprising a housing (161), an IGBT module (162) and a heat sink (163); the IGBT module (162) being at least partially arranged at the bottom of an inner cavity of the housing (161); the heat sink (163) being arranged at the bottom of the housing (161), close to the IGBT module (162), and at least partially arranged in the second heat dissipation channel (14).

2. The screw compressor with integrated cooling system as claimed in claim 1, characterized in that: The shell (161) comprises an upper shell (1611), a lower shell (1612), a first sealing step surface (1613) and a second sealing step surface (1614); the front ends of the upper shell (1611) and the lower shell (1612) are connected via the first sealing step surface (1613) to form a sealing structure; the rear ends of the upper shell (1611) and the lower shell (1612) are connected via the second sealing step surface (1614) to form a sealing structure.

3. The screw compressor with integrated cooling system as claimed in claim 2, characterized in that: A gap D1 between the first sealing step surface (1613) between the upper shell (1611) and the lower shell (1612) is less than or equal to 1 mm; a gap D2 between the second sealing step surface (1614) between the upper shell (1611) and the lower shell (1612) is less than or equal to 1 mm.

4. The screw compressor with integrated cooling system as claimed in claim 2, characterized in that: A liquid crystal display driving board (1614) is provided on the top of the upper shell (1611), and a display screen mask (1615) is covered on the liquid crystal display driving board (1614).

5. The screw compressor with integrated cooling system as claimed in claim 2, characterized in that: The lower shell (1612) is made of plastic, and the IGBT module (162) is made of a metal plate; a hard-soft sealing structure is formed between the lower shell (1612) and the IGBT module (162), which can prevent water vapor and dust from entering the variable frequency speed regulation component (16) from the drive component (12).

6. The screw compressor with integrated cooling system as claimed in claim 2, characterized in that: A lead-out module (164) is provided at the rear end of the lower shell (1612); the lead-out module (164) comprises a lead-out wire (1641) connecting the internal and external circuits of the variable frequency speed regulation component (16) and a sealing sleeve (1642) covering the lead-out wire (1641); a sealing ring (1643) sleeved on the sealing sleeve (1642) is provided at the connection between the sealing sleeve (1642) and the lower shell (1612).

7. The screw compressor with integrated cooling system as claimed in claim 1, characterized in that: The variable frequency speed regulation component (16) further comprises a rectifier module (165) and an inverter drive PCB board (166); the inverter drive PCB board (166) is at least partially disposed in the housing (161) and is connected to the IGBT module (162) via the rectifier module (165).

8. The screw compressor with integrated cooling system as claimed in claim 7, characterized in that: The drive motor (122) includes a first operating speed and a second operating speed; when the variable frequency speed regulation component (16) is operating at a rated load, the drive motor (122) is at the first operating speed; when the load of the air compression component (11) changes and the operating loads of the rectifier module (165) and the IGBT module (162) change accordingly, the variable frequency speed regulation component (16) controls the drive motor (122) to be at the second operating speed; the ratio of the difference between the second operating speed and the first operating speed to the operating load change value of the rectifier module (165) and the IGBT module (162) is a variation coefficient k.

9. The screw compressor with integrated cooling system as claimed in claim 1, characterized in that: An air guide cover (155) is provided above the air inlet (154); an air guide plate (156) is provided at one end of the bottom of the variable frequency speed regulation component (16) close to the air guide cover (155); an air guide channel (157) is formed between the air guide plate (156) and the air guide cover (155); air can flow from the air inlet (154) into the cover body (151), be guided by the air guide cover (155) and the air guide plate (156), and flow from the air guide channel (157) into the second heat dissipation channel (14).

10. The screw compressor with integrated cooling system as claimed in claim 1, characterized in that: The air inlet (154) is an air inlet louver window.

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