Energy-saving screw refrigerating unit

Abstract

The application discloses an energy-saving screw refrigerating unit, which comprises a refrigerating unit body, wherein the refrigerating unit body comprises a cooling heat exchanger, a temperature-rising heat exchanger, an oil-gas separator, a control box, a screw compressor and an expansion valve; the gas outlet end of the cooling heat exchanger is connected with the gas inlet end of the screw compressor through a pipeline; and the gas outlet end of the screw compressor is connected with the gas inlet end of the oil-gas separator through a pipeline. The magnetic force coupling mode of the magnetic strip one and the magnetic strip two is adopted, a single driving motor can drive the screw one and the screw two to reversely and synchronously operate, and the energy consumption and heating problems caused by gear meshing friction, mechanical impact and gear stirring oil are completely eliminated. The non-contact magnetic transmission structure effectively reduces the screw operation wear and vibration noise, avoids the defects of traditional gear transmission, such as easy failure and high loss, significantly improves the compression operation efficiency, reduces the mechanical component loss, prolongs the service life of the screw compressor, and improves the overall energy-saving effect and operation stability of the unit.

Description

Technical Field

[0001] This invention relates to the field of screw chiller technology, specifically to an energy-saving screw chiller. Background Technology

[0002] Screw chillers are widely used in continuous operation refrigeration scenarios such as industrial process cooling, cold chain storage, and central air conditioning. A typical screw chiller mainly consists of a heat exchanger, screw compressor, oil-gas separator, expansion valve, and electrical control box. It completes the refrigeration cycle by engaging and compressing the refrigerant with the screw rotor. Currently, most mainstream screw compressors on the market use a motor paired with synchronous gears for transmission. The motor's output torque is transmitted through the gear pair to drive the male and female screws to rotate in opposite directions. This structure has long been plagued by multiple energy consumption issues and equipment defects.

[0003] Traditional gear meshing transmissions suffer from high mechanical losses. The continuous friction and agitation of lubricating oil by high-speed gears generate a large amount of heat, which not only increases the compressor's input power consumption but also significantly raises the lubricating oil temperature, forcing the oil cooling system to operate under high load continuously, resulting in secondary energy consumption. The gear meshing clearance is easily affected by vibration and temperature, causing fluctuations in the screw meshing clearance, increasing the amount of refrigerant backflow and leakage, and continuously reducing the unit's operating efficiency. At the same time, the frequent replacement of vulnerable parts such as gears, gear oil seals, and high-speed bearings leads to high maintenance costs. Summary of the Invention

[0004] The purpose of this invention is to provide an energy-saving screw chiller unit to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an energy-saving screw chiller unit, comprising a chiller unit body, wherein the chiller unit body includes a cooling heat exchanger, a heating heat exchanger, an oil-gas separator, a control box, a screw compressor, and an expansion valve; the outlet end of the cooling heat exchanger is connected to the inlet end of the screw compressor via a pipe; the outlet end of the screw compressor is connected to the inlet end of the oil-gas separator via a pipe; the oil outlet end of the oil-gas separator is connected to the oil inlet end of the screw compressor via a pipe; the outlet end of the oil-gas separator is connected to the inlet end of the heating heat exchanger via a pipe; the outlet end of the heating heat exchanger is connected to the inlet end of the expansion valve via a pipe; and the outlet end of the expansion valve is connected to the inlet end of the cooling heat exchanger via a pipe.

[0006] Preferably, the refrigeration unit body further includes two supporting vertical plates. The cooling heat exchanger and the heating heat exchanger are both installed on the inner side of the opposite surfaces of the two supporting vertical plates. A support base is fixedly installed on the top of the cooling heat exchanger. The screw compressor is fixedly installed on the top of the support base. A first supporting horizontal plate is fixedly installed on one side of the support base. The oil-gas separator is fixedly installed on the top of the first supporting horizontal plate. A second supporting horizontal plate is fixedly installed on one side of one of the supporting vertical plates. The control box is fixedly installed on the top of the second supporting horizontal plate.

[0007] Preferably, the screw compressor includes an end cover, a compression housing, and an air storage housing. An mounting plate is fixedly installed on one side of the end cover, and the mounting plate is sealed to one side of the compression housing by bolts. A support leg is fixedly installed on the end of the compression housing away from the end cover.

[0008] Preferably, the mounting plate has an air guide cavity inside, and a cross connecting frame is fixedly installed inside the air guide cavity. Both ends of the cross connecting frame are fixedly installed with mounting rings. Alloy isolation shielding sleeve one and alloy isolation shielding sleeve two are respectively installed inside the mounting rings via bearings. One end of alloy isolation shielding sleeve one and alloy isolation shielding sleeve two are respectively fixedly installed with screw one and screw two. The compression housing has a compression air cavity inside, and screw one and screw two are both located inside the compression air cavity.

[0009] Preferably, an inner rotating post two is fixedly installed inside the alloy isolation shielding sleeve two, and a magnetic strip two is fixedly installed on the outer side of the inner rotating post two; an inner rotating post one is fixedly installed inside the alloy isolation shielding sleeve one, and a magnetic strip one is fixedly installed on the outer side of the support base.

[0010] Preferably, a drive motor is fixedly installed inside the end cap, and the output end of the drive motor is fixedly connected to the outer side of the alloy isolation shield.

[0011] Preferably, an oil collecting cylinder is fixedly installed on one side of the cross connecting frame. The oil collecting cylinder is inclined, and two oil scraper blades are symmetrically fixedly installed on the outer side of the oil collecting cylinder. The ends of the two oil scraper blades away from the oil collecting cylinder are in contact with the outer sides of alloy isolation shielding sleeve one and alloy isolation shielding sleeve two, respectively.

[0012] Preferably, oil inlet grooves are provided on both sides of the oil collecting cylinder, and an oil baffle is fixedly installed at the end of the oil collecting cylinder away from the mounting plate. The side of the oil baffle where it connects with the oil collecting cylinder is in contact with the ends of alloy isolation shielding sleeve one and alloy isolation shielding sleeve two.

[0013] Preferably, the cross-shaped connecting frame has four auxiliary oil outlet holes and multiple oil outlet grooves inside, and the auxiliary oil outlet holes and oil outlet grooves are all corresponding to the positions of the oil collection cylinder.

[0014] Preferably, four support legs are symmetrically fixedly installed at the bottom of the compression housing, and the ends of the four support legs away from the compression housing are fixedly installed on the top of the support base.

[0015] Compared with existing technologies, the beneficial effects of this invention are as follows: By employing magnetic coupling between magnetic stripe one and magnetic stripe two, a single drive motor can drive screw one and screw two to operate synchronously in opposite directions, completely eliminating the energy consumption and heat generation problems caused by gear meshing friction, mechanical impact, and gear oil churning. The non-contact magnetic transmission structure effectively reduces screw wear and vibration noise, avoids the defects of traditional gear transmission such as easy failure and high loss, and significantly improves compression efficiency. At the same time, it reduces wear on mechanical parts, extends the service life of the screw compressor, and improves the overall energy-saving effect and operational stability of the unit from the root of transmission.

[0016] In addition, the unit is equipped with an automatic oil scraping and removal structure consisting of an oil scraper, an oil collection cylinder, and an oil baffle. This structure can remove the lubricating oil film and oil mist adhering to the outside of the alloy isolation shield in real time, effectively solving problems such as magnetic gap changes, magnetic force deviations, and phase slippage caused by oil accumulation. This ensures the synchronous meshing accuracy of the two screws and prevents refrigerant backflow and leakage. The scraped oil can be recycled through a dedicated oil circuit, reducing lubricating oil consumption. Simultaneously, it prevents oil and carbon deposits from corroding the shield and magnets, significantly reducing the frequency and cost of unit maintenance and ensuring long-term stable, efficient, and energy-saving operation of the unit. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the three-dimensional appearance structure of the present invention.

[0018] Figure 2 This is a three-dimensional structural schematic diagram of the present invention from another perspective.

[0019] Figure 3 This is a three-dimensional structural diagram of the screw compressor of the present invention.

[0020] Figure 4 This is a schematic cross-sectional view of the end shell structure of the screw compressor of the present invention.

[0021] Figure 5 This is a schematic diagram of the three-dimensional structure of the screw compressor of the present invention after removing the end shell.

[0022] Figure 6 This is a schematic diagram of the three-dimensional structure of the end shell of the present invention.

[0023] Figure 7 For the present invention Figure 6 Enlarged structural diagram at point A in the middle.

[0024] Figure 8 This is a schematic diagram of the internal structure of alloy isolation shielding sleeve one and alloy isolation shielding sleeve two of the present invention.

[0025] In the diagram: 1. Support plate; 2. Cooling heat exchanger; 3. Heating heat exchanger; 4. Support plate one; 5. Oil-gas separator; 6. Control box; 7. Support plate two; 8. Screw compressor; 9. Support base; 10. Expansion valve; 11. End cap; 12. Compression housing; 13. Support leg; 14. Gas storage shell; 15. Screw one; 16. Alloy isolation shield one; 17. Drive motor; 18. Alloy isolation shield two; 19. Compressed air chamber; 20. Screw two; 21. Cross connecting frame; 22. Oil scraper; 23. Oil collection cylinder; 24. Oil inlet groove; 25. Oil baffle; 26. Air guide chamber; 27. Mounting bracket ring; 28. Mounting plate; 29. ​​Inner rotating column one; 30. Inner rotating column two; 31. Magnetic strip one; 32. Magnetic strip two; 33. Auxiliary oil outlet hole; 34. Oil outlet groove. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] Please see Figures 1-8 This invention provides a technical solution: an energy-saving screw chiller unit, including a chiller unit body, the chiller unit body including a cooling heat exchanger 2, a heating heat exchanger 3, an oil-gas separator 5, a control box 6, a screw compressor 8 and an expansion valve 10, the outlet end of the cooling heat exchanger 2 is connected to the inlet end of the screw compressor 8 through a pipe, the outlet end of the screw compressor 8 is connected to the inlet end of the oil-gas separator 5 through a pipe, the oil outlet end of the oil-gas separator 5 is connected to the oil inlet end of the screw compressor 8 through a pipe, the outlet end of the oil-gas separator 5 is connected to the inlet end of the heating heat exchanger 3 through a pipe, the outlet end of the heating heat exchanger 3 is connected to the inlet end of the expansion valve 10 through a pipe, and the outlet end of the expansion valve 10 is connected to the inlet end of the cooling heat exchanger 2 through a pipe;

[0028] The screw compressor 8 includes an end cover 11, a compression housing 12, and an air storage housing 14. A mounting plate 28 is fixedly installed on one side of the end cover 11. The mounting plate 28 is bolted and sealed to one side of the compression housing 12. A support leg 13 is fixedly installed at the end of the compression housing 12 away from the end cover 11. An air guide chamber 26 is formed inside the mounting plate 28. A cross-shaped connecting frame 21 is fixedly installed inside the air guide chamber 26. Mounting rings 27 are fixedly installed at both ends of the cross-shaped connecting frame 21. Alloy isolation shielding sleeve one 16 and alloy isolation shielding sleeve two 18 are respectively mounted inside the mounting rings 27 via bearings. Screw 15 and screw 20 are fixedly installed at one end of shielding sleeve 2 18, respectively. A compressed air chamber 19 is opened inside the compression housing 12, and screw 15 and screw 20 are both located inside the compressed air chamber 19. An inner rotating column 30 is fixedly installed inside the alloy isolation shielding sleeve 2 18, and a magnetic strip 32 is fixedly installed on the outside of the inner rotating column 30. An inner rotating column 29 is fixedly installed inside the alloy isolation shielding sleeve 1 16, and a magnetic strip 31 is fixedly installed on the outside of the support base 9. A drive motor 17 is fixedly installed inside the end cover 11, and the output end of the drive motor 17 is fixedly connected to the outside of the alloy isolation shielding sleeve 1 16.

[0029] The working principle of the above technical solution is as follows: After the unit starts, the low-temperature and low-pressure gas-liquid mixed refrigerant continuously enters the cooling heat exchanger 2, fully absorbs the heat from the external environment or process equipment, completes the phase change heat exchange, and achieves the terminal cooling effect. After the heat exchange is completed, the low-temperature liquid refrigerant is completely converted into low-temperature and low-pressure gaseous refrigerant. The gaseous refrigerant is smoothly transported to the inlet end of the screw compressor 8 through a dedicated gas pipeline.

[0030] The unit relies solely on the drive motor 17 as its sole power source. The motor output directly drives the alloy isolation shield sleeve 16, the internal inner rotating column 29, and the matching magnetic strip 31 to rotate synchronously at high speed. Relying on the precise magnetic pole phase arrangement, the magnetic strip 32, the inner rotating column 30, and the alloy isolation shield sleeve 18 are pulled in opposite directions and rotate synchronously through non-contact magnetic coupling force. No mechanical transmission structure such as gears or couplings is required. This drives the screw 15 and screw 20 to precisely mesh in opposite directions inside the compression chamber 19, continuously compressing the intake low-temperature and low-pressure gaseous refrigerant, effectively increasing the pressure and temperature of the refrigerant, and completing the core compression process of refrigeration. There is no mechanical friction loss and the transmission accuracy is high.

[0031] During the compression operation of the screw compressor 8, a small amount of lubricating oil is continuously injected to achieve screw sealing, cooling, and lubrication. This results in the compressed medium being a high-temperature, high-pressure oil-gas mixture. The mixed medium is then sent through a pipeline into the oil-gas separator 5. Through centrifugal and filtration separation principles, the refrigerant and lubricating oil are completely separated. The purified lubricating oil is precisely returned to the oil inlet of the screw compressor 8 through the return oil pipeline, continuously providing lubrication and cooling for the screw rotor and bearings. This achieves closed-loop circulation and reuse of lubricating oil, significantly reducing oil loss. The separated high-temperature, high-pressure pure gaseous refrigerant is free of oil contamination, effectively preventing subsequent blockage and scaling of heat exchangers and valves.

[0032] The high-temperature, high-pressure gaseous refrigerant, after being cleaned of oil, is transported to the heating heat exchanger 3, where it fully exchanges heat with the external medium, releases heat, and completes condensation and liquefaction, transforming into a room-temperature, high-pressure liquid refrigerant. The condensed liquid refrigerant is then smoothly transported to the expansion valve 10, where it is precisely throttled, depressurized, and cooled to stabilize the pressure, quickly transforming into a low-temperature, low-pressure gas-liquid two-phase mixed refrigerant. Finally, the low-temperature refrigerant flows back to the cooling heat exchanger 2 to rejoin the heat absorption and refrigeration cycle, forming a continuous closed-loop refrigeration circuit with stable operating conditions and consistently high refrigeration efficiency.

[0033] In another implementation scheme, such as Figures 1-8 As shown, an oil collecting cylinder 23 is fixedly installed on one side of the cross connecting frame 21. The oil collecting cylinder 23 is inclined. Two oil scraper blades 22 are symmetrically fixedly installed on the outer side of the oil collecting cylinder 23. The ends of the two oil scraper blades 22 away from the oil collecting cylinder 23 are in contact with the outer sides of alloy isolation shielding sleeve 16 and alloy isolation shielding sleeve 28, respectively. Oil inlet grooves 24 are opened on both sides of the oil collecting cylinder 23. An oil baffle plate 25 is fixedly installed on the end of the oil collecting cylinder 23 away from the mounting plate 28. The side of the oil baffle plate 25 connected to the oil collecting cylinder 23 is in contact with the ends of alloy isolation shielding sleeve 16 and alloy isolation shielding sleeve 28. Four auxiliary oil outlet holes 33 are opened inside the cross connecting frame 21. Multiple oil outlet grooves 34 are opened inside the cross connecting frame 21, and the auxiliary oil outlet holes 33 and oil outlet grooves 34 are all corresponding to the positions of the oil collecting cylinder 23.

[0034] During unit operation, the inclined oil collecting cylinder 23, fixed on the cross connecting frame 21, remains stationary and rotates continuously with the alloy isolation shielding sleeve 16 and alloy isolation shielding sleeve 28. The oil scraping plates 22, symmetrically arranged on both sides, are always in close contact with the outer circular wall of the shielding sleeve, scraping and cleaning the attached oil mist, oil film and carbon deposits in real time. The scraped oil is quickly collected through the oil inlet grooves 24 on both sides of the oil collecting cylinder 23, and then flows back to the unit's oil circuit system through the auxiliary oil outlet hole 33 and oil outlet groove 34. At the same time, the end baffle plate 25 can effectively seal the gap at the end of the shielding sleeve, preventing internal oil and gas from seeping out and adhering to the magnet area, ensuring that the magnetic coupling air gap is clean and uniform throughout the process, and completely avoiding faults such as magnetic attenuation, phase slippage and screw meshing deviation caused by oil.

[0035] In another implementation scheme, such as Figures 1-8 As shown, the refrigeration unit body also includes two supporting vertical plates 1. The cooling heat exchanger 2 and the heating heat exchanger 3 are both installed on the inner side of the opposite face of the two supporting vertical plates 1. The top of the cooling heat exchanger 2 is fixedly installed with a support base 9. The screw compressor 8 is fixedly installed on the top of the support base 9. The first supporting horizontal plate 4 is fixedly installed on one side of the support base 9. The oil-gas separator 5 is fixedly installed on the top of the first supporting horizontal plate 4. The second supporting horizontal plate 7 is fixedly installed on one side of one of the supporting vertical plates 1. The control box 6 is fixedly installed on the top of the second supporting horizontal plate 7. The bottom of the compression housing 12 is symmetrically fixedly installed with four supporting legs 13, and the ends of the four supporting legs 13 away from the compression housing 12 are fixedly installed on the top of the support base 9.

[0036] The main support frame of the unit is formed by two support plates 1. The cooling heat exchanger 2 and the heating heat exchanger 3 are embedded in the two support plates 1. The structure is compact and has strong heat exchange stability. The support seat 9 on the top of the cooling heat exchanger 2 provides a stable installation base for the screw compressor 8. Together with the four support legs 13 at the bottom of the compressor shell 12, the vibration of the compressor operation is greatly reduced. The first support plate 4 and the second support plate 7 independently support the oil-gas separator 5 and the control box 6, respectively, so that the electrical control, oil-gas separation and compression heat exchange modules are arranged in separate areas without interference. The entire support structure has strong seismic resistance and a regular layout, which effectively improves the overall operating stability and maintenance convenience of the unit.

[0037] Working principle: After the unit starts, the low-temperature and low-pressure gas-liquid mixed refrigerant continuously enters the cooling heat exchanger 2, fully absorbs the heat from the external environment or process equipment, completes phase change heat exchange, and achieves terminal cooling effect. After the heat exchange is completed, the low-temperature liquid refrigerant is completely converted into low-temperature and low-pressure gaseous refrigerant. The gaseous refrigerant is smoothly transported to the inlet end of the screw compressor 8 through a dedicated gas pipeline.

[0038] The unit relies solely on the drive motor 17 as its sole power source. The motor output directly drives the alloy isolation shield sleeve 16, the internal inner rotating column 29, and the matching magnetic strip 31 to rotate synchronously at high speed. Relying on the precise magnetic pole phase arrangement, the magnetic strip 32, the inner rotating column 30, and the alloy isolation shield sleeve 18 are pulled in opposite directions and rotate synchronously through non-contact magnetic coupling force. No mechanical transmission structure such as gears or couplings is required. This drives the screw 15 and screw 20 to precisely mesh in opposite directions inside the compression chamber 19, continuously compressing the intake low-temperature and low-pressure gaseous refrigerant, effectively increasing the pressure and temperature of the refrigerant, and completing the core compression process of refrigeration. There is no mechanical friction loss and the transmission accuracy is high.

[0039] During the compression operation of the screw compressor 8, a small amount of lubricating oil is continuously injected to achieve screw sealing, cooling, and lubrication. This results in the compressed medium being a high-temperature, high-pressure oil-gas mixture. The mixed medium is then sent through a pipeline into the oil-gas separator 5. Through centrifugal and filtration separation principles, the refrigerant and lubricating oil are completely separated. The purified lubricating oil is precisely returned to the oil inlet of the screw compressor 8 through the return oil pipeline, continuously providing lubrication and cooling for the screw rotor and bearings. This achieves closed-loop circulation and reuse of lubricating oil, significantly reducing oil loss. The separated high-temperature, high-pressure pure gaseous refrigerant is free of oil contamination, effectively preventing subsequent blockage and scaling of heat exchangers and valves.

[0040] The high-temperature, high-pressure gaseous refrigerant, after being cleaned of oil, is delivered to the heating heat exchanger 3, where it fully exchanges heat with the external medium, releases heat, and completes condensation and liquefaction, transforming into a room-temperature, high-pressure liquid refrigerant. The condensed liquid refrigerant is then steadily delivered to the expansion valve 10, where it is precisely throttled, depressurized, and cooled to stabilize the pressure, quickly transforming into a low-temperature, low-pressure gas-liquid two-phase mixed refrigerant. Finally, the low-temperature refrigerant flows back to the cooling heat exchanger 2 to rejoin the heat absorption and refrigeration cycle, forming a continuous closed-loop refrigeration circuit with stable operating conditions and consistently high refrigeration efficiency.

[0041] When the unit is running, the inclined oil collecting cylinder 23 fixed on the cross connecting frame 21 remains stationary and rotates continuously with the alloy isolation shielding sleeve 16 and the alloy isolation shielding sleeve 28. The oil scraping plates 22 arranged symmetrically on both sides are always in close contact with the outer circular wall of the shielding sleeve, scraping and cleaning the attached oil mist, oil film and carbon deposits in real time. The scraped oil is quickly collected through the oil inlet grooves 24 on both sides of the oil collecting cylinder 23, and then flows back to the unit's oil circuit system through the auxiliary oil outlet hole 33 and the oil outlet groove 34. At the same time, the end baffle plate 25 can effectively seal the gap at the end of the shielding sleeve, preventing the internal oil and gas from seeping out and adhering to the magnet area, ensuring that the magnetic coupling air gap is clean and uniform throughout the process, and completely avoiding faults such as magnetic attenuation, phase slippage and screw meshing deviation caused by oil.

[0042] The main support frame of the unit is formed by two support plates 1. The cooling heat exchanger 2 and the heating heat exchanger 3 are embedded in the two support plates 1. The structure is compact and has strong heat exchange stability. The support seat 9 on the top of the cooling heat exchanger 2 provides a stable installation base for the screw compressor 8. Together with the four support legs 13 at the bottom of the compressor shell 12, the vibration of the compressor operation is greatly reduced. The first support plate 4 and the second support plate 7 independently support the oil-gas separator 5 and the control box 6, respectively, so that the electrical control, oil-gas separation and compression heat exchange modules are arranged in separate areas without interference. The entire support structure has strong seismic resistance and a regular layout, which effectively improves the overall operating stability and maintenance convenience of the unit.

[0043] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An energy-saving screw chiller unit, comprising a chiller unit body, characterized in that: The main body of the refrigeration unit includes a cooling heat exchanger (2), a heating heat exchanger (3), an oil-gas separator (5), a control box (6), a screw compressor (8), and an expansion valve (10). The outlet of the cooling heat exchanger (2) is connected to the inlet of the screw compressor (8) through a pipe. The outlet of the screw compressor (8) is connected to the inlet of the oil-gas separator (5) through a pipe. The oil outlet of the oil-gas separator (5) is connected to the oil inlet of the screw compressor (8) through a pipe. The outlet of the oil-gas separator (5) is connected to the inlet of the heating heat exchanger (3) through a pipe. The outlet of the heating heat exchanger (3) is connected to the inlet of the expansion valve (10) through a pipe. The outlet of the expansion valve (10) is connected to the inlet of the cooling heat exchanger (2) through a pipe.

2. The energy-saving screw chiller unit according to claim 1, characterized in that: The main body of the refrigeration unit also includes two supporting vertical plates (1). The cooling heat exchanger (2) and the heating heat exchanger (3) are both installed on the inner side of the opposite face of the two supporting vertical plates (1). A support base (9) is fixedly installed on the top of the cooling heat exchanger (2). The screw compressor (8) is fixedly installed on the top of the support base (9). A first supporting horizontal plate (4) is fixedly installed on one side of the support base (9). The oil-gas separator (5) is fixedly installed on the top of the first supporting horizontal plate (4). A second supporting horizontal plate (7) is fixedly installed on one side of one of the supporting vertical plates (1). The control box (6) is fixedly installed on the top of the second supporting horizontal plate (7).

3. The energy-saving screw chiller unit according to claim 2, characterized in that: The screw compressor (8) includes an end cap (11), a compression housing (12) and an air storage housing (14). An mounting plate (28) is fixedly installed on one side of the end cap (11). The mounting plate (28) is installed on one side of the compression housing (12) by bolt sealing. A support leg (13) is fixedly installed on the end of the compression housing (12) away from the end cap (11).

4. The energy-saving screw chiller unit according to claim 3, characterized in that: The mounting plate (28) has an air guide cavity (26) inside. A cross connecting frame (21) is fixedly installed inside the air guide cavity (26). Mounting frame rings (27) are fixedly installed at both ends of the cross connecting frame (21). Alloy isolation shielding sleeve one (16) and alloy isolation shielding sleeve two (18) are respectively installed inside the mounting frame ring (27) through bearings. One end of alloy isolation shielding sleeve one (16) and alloy isolation shielding sleeve two (18) is fixedly installed with screw one (15) and screw two (20) respectively. The compression housing (12) has a compression air cavity (19) inside, and screw one (15) and screw two (20) are both located inside the compression air cavity (19).

5. An energy-saving screw chiller unit according to claim 4, characterized in that: The inner rotating post 2 (30) is fixedly installed inside the alloy isolation shielding sleeve 2 (18), and the magnetic strip 2 (32) is fixedly installed on the outer side of the inner rotating post 2 (30). The inner rotating post 1 (29) is fixedly installed inside the alloy isolation shielding sleeve 1 (16), and the magnetic strip 1 (31) is fixedly installed on the outer side of the support base (9).

6. The energy-saving screw chiller unit according to claim 5, characterized in that: A drive motor (17) is fixedly installed inside the end cap (11), and the output end of the drive motor (17) is fixedly connected to the outside of the alloy isolation shield sleeve (16).

7. An energy-saving screw chiller unit according to claim 6, characterized in that: An oil collecting cylinder (23) is fixedly installed on one side of the cross connecting frame (21). The oil collecting cylinder (23) is inclined. Two oil scraper blades (22) are symmetrically fixedly installed on the outer side of the oil collecting cylinder (23). The ends of the two oil scraper blades (22) away from the oil collecting cylinder (23) are in contact with the outer sides of alloy isolation shielding sleeve one (16) and alloy isolation shielding sleeve two (18), respectively.

8. An energy-saving screw chiller unit according to claim 7, characterized in that: Oil inlet grooves (24) are provided on both sides of the oil collecting cylinder (23). An oil baffle (25) is fixedly installed at the end of the oil collecting cylinder (23) away from the mounting plate (28). One side of the oil baffle (25) connected to the oil collecting cylinder (23) is in contact with the ends of alloy isolation shielding sleeve one (16) and alloy isolation shielding sleeve two (18).

9. An energy-saving screw chiller unit according to claim 8, characterized in that: The cross connecting frame (21) has four auxiliary oil outlet holes (33) inside and multiple oil outlet grooves (34) inside, and the auxiliary oil outlet holes (33) and oil outlet grooves (34) are all corresponding to the position of the oil collection cylinder (23).

10. An energy-saving screw chiller unit according to claim 9, characterized in that: The bottom of the compression housing (12) is symmetrically fixedly equipped with four support legs (13), and the ends of the four support legs (13) away from the compression housing (12) are fixedly installed on the top of the support base (9).

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