A scroll compressor and its oil-gas separation device

Abstract

The present invention relates to a scroll compressor, in particular to a scroll compressor and its oil-gas separation device, which includes an oil-gas fine separation component, a rear cover plate, a secondary separation cover plate, a coarse separation cover plate, a stationary scroll, a moving scroll and a housing; an annular outer ring and a first air guide rib are arranged on the end face on the other side of the stationary scroll; the coarse separation cover plate is arranged on the annular outer ring, and a coarse separation chamber is formed between the annular outer ring and the coarse separation cover plate; a coarse separation air inlet is arranged in the middle of the stationary scroll; the rear cover plate is arranged at the tail of the housing, and a secondary separation chamber is formed between the rear cover plate and the housing, and the coarse separation exhaust hole is communicated with the secondary separation chamber; a second air guide rib is arranged on the end face inside the rear cover plate, and the secondary separation cover plate is arranged on the second air guide rib; a cavity is formed between the second air guide rib and the secondary separation cover plate, and the cavity air inlet is communicated with the secondary separation chamber; the cavity air outlet penetrates through the inner and outer sides of the rear cover plate; the oil-gas fine separation component is arranged on the outer side of the rear cover plate. This patent improves the effect of oil-gas separation.

Description

Technical Field

[0001] The present invention relates to a scroll compressor, and in particular to a scroll compressor and an oil-gas separation device thereof. Background Art

[0002] A scroll compressor mainly consists of a control part, a motor part, and a compression part. The compression part has a pair of scroll disks. The main compression process of the scroll compressor is realized by the scroll disks. The refrigerant is compressed into a high-temperature and high-pressure gas by the scroll disks. The high-temperature and high-pressure gas is discharged through the exhaust holes on the stationary scroll disk, flows to the motor area, and then is discharged through the exhaust pipe. During the use of the compressor, in order to meet the needs of lubrication, sealing, and cooling, liquid lubricating oil is often used. These lubricating oils lubricate the moving pairs, so that friction and wear can be reduced. At the same time, due to the presence of the lubricating oil, the leakage amount generated through the mating clearance is greatly reduced. Finally, the lubricating oil can cool the key moving parts of the compressor, such as bearings, rotors, and cylinders, etc., thereby improving the working reliability of the compressor. During the operation of the scroll compressor, the high-temperature and high-pressure gas will fill the internal space of the compressor. When the high-temperature and high-pressure gas flows, it will carry away the lubricating oil in the compressor. Therefore, before the compressed gas is discharged, it is necessary to separate the oil and gas from the gas through an oil-gas separation device.

[0003] The existing scroll compressor, for example, a Chinese utility model patent (Publication No.: CN211343344U, Publication Date: 20200825) discloses a horizontal scroll compressor with an oil-gas separation mechanism, belonging to the technical field of intelligent equipment drive control. It includes a stationary scroll disk, a moving scroll disk, an oil-gas separation device, an eccentric shaft, a housing, a stator, a rotor, a bearing seat one, a bearing seat two, a moving scroll disk bearing, an exhaust port, an intake pipe, and an exhaust pipe. The oil-gas separation device includes an inner cylinder, an outer cylinder, a spiral partition plate, and a guide pipe. The spiral partition plate is spirally arranged between the inner wall of the outer cylinder and the outer wall of the inner cylinder. The spiral partition plate divides the oil-gas separation cavity into a spiral gas flow path. During the oil-gas flow process of the present invention, it collides with the inner wall of the outer cylinder and the outer wall of the inner cylinder, condenses into oil, and the oil is guided back to the oil storage cavity of the compressor, and is shunted to lubricate the moving and vulnerable parts such as the bearing of the bearing seat, the moving scroll disk bearing, the bearing seat friction pad, and the stationary disk friction pad, etc., enhancing the smoothness and durability of the operation of the scroll compressor, reducing the friction noise, and improving the service life of the moving and vulnerable parts.

[0004] The above-mentioned scroll compressor has the following problems: only filtering the air once cannot ensure that the content of lubricating oil in the air is qualified. Summary of the Invention

[0005] To solve the above problems, the object of the present invention is to provide a scroll compressor and its oil-gas separation device. The compressed gas first passes through the coarse separation chamber on the back of the stationary disk for the first filtration, then the gas is introduced into the secondary separation chamber inside the rear cover plate for another filtration, and finally the gas is introduced into the oil-gas separation device on the outside of the rear cover plate for fine separation. Through multiple filtrations, it is ensured that the lubricating oil content in the final gas is qualified.

[0006] To achieve the object of the present invention, the following technical solutions are adopted for implementation:

[0007] An oil-gas separation device for a scroll compressor includes an oil-gas fine separation component, a rear cover plate, a secondary separation cover plate, a coarse separation cover plate, a stationary disk, a moving disk, and a body; the secondary separation cover plate, the coarse separation cover plate, the stationary disk, and the moving disk are all located inside the body; an oil sump is provided at the lower part inside the body; the stationary disk is fixedly arranged on the body; the moving disk is cooperatively arranged on the scroll part on one side of the stationary disk, and a compression chamber is formed between the moving disk and the stationary disk; an annular outer ring and a first air guiding rib are arranged on the end face on the other side of the stationary disk; the annular outer ring is arranged along the outer edge of the stationary disk, and the coarse separation cover plate is arranged on the annular outer ring, so that a coarse separation chamber is formed between the annular outer ring and the coarse separation cover plate; the first air guiding rib is arc-shaped and is located inside the annular outer ring; a notch is left at the lower part of the annular outer ring, and the first air guiding rib divides the notch into a coarse separation exhaust port and a first oil drain port; the first oil drain port is located below the coarse separation exhaust port; the opening of the first air guiding rib faces the first oil drain port, and the first oil drain port communicates with the oil sump and is sealed by lubricating oil; a coarse separation air inlet communicating with the compression chamber is provided in the middle of the first air guiding rib, and an air flow channel is formed between the outer side of the first air guiding rib and the inner side of the annular outer ring. One end of the air flow channel communicates with the coarse separation air inlet, and the other end communicates with the coarse separation exhaust port.

[0008] The rear cover plate is provided at the tail of the body, and a secondary separation chamber is formed between the rear cover plate and the body. The coarse separation exhaust hole communicates with the secondary separation chamber; a second air guiding rib is arranged on the inner end face of the rear cover plate, and the secondary separation cover plate is arranged on the second air guiding rib; a cavity is formed between the second air guiding rib and the secondary separation cover plate. A cavity air inlet communicating with the secondary separation chamber is provided on one side of the second air guiding rib, and a cavity air outlet penetrating the rear cover plate is provided on the inner side of the second air guiding rib; a second oil drain port is provided at the bottom of the second air guiding rib.

[0009] An oil-gas separation seat is arranged on the outside of the rear cover plate, and an oil-gas fine separation component is arranged on the oil-gas separation seat. A fine separation chamber is formed between the oil-gas fine separation component and the oil-gas separation seat; the fine separation chamber is provided with an air inlet end and an air outlet end; the air inlet end of the fine separation chamber communicates with the cavity air outlet.

[0010] Preferably, a coarse separation cover plate mounting hole is arranged on the annular outer ring, and the coarse separation cover plate is connected to the coarse separation cover plate mounting hole by bolts; the length of the first air guiding rib along the axial direction of the stationary disk is the same as that of the annular outer ring.

[0011] Preferably, the first air guiding rib forms an oil return seat and an air inlet seat; the oil return seat is arranged on the upper part of the static disk, and the air inlet seat is arranged on the lower part of the static disk; the air inlet seat divides the notch into a coarse separation exhaust port and a first lower oil port.

[0012] Preferably, the oil and gas fine separation assembly includes an oil separation core rod, an oil separation core and an oil separation core cover; the lower part of the oil separation core rod is connected to the cavity air outlet; the oil separation core is coated on the outer side of the oil separation core rod, the oil separation core cover is arranged on the outer side of the oil separation core, and the oil separation core cover is arranged on the oil and gas separation seat.

[0013] Preferably, the material of the oil separation core is cotton.

[0014] Preferably, an oil return seat is arranged on the static disk, an oil return hole is arranged in the oil return seat, and the oil return hole is communicated with the compression chamber; a one-way oil return assembly mounting hole penetrating through the rear cover plate is arranged at the lower part of the oil and gas separation seat, a one-way oil return assembly is arranged in the one-way oil return assembly mounting hole, and the outlet end of the one-way oil return assembly extends into the compression chamber through the oil return hole.

[0015] Preferably, a secondary separation cover plate mounting hole is arranged on the second air guiding rib, and the secondary separation cover plate is fixedly mounted on the secondary separation cover plate mounting hole by bolts.

[0016] Preferably, a minimum pressure valve is arranged at the outlet end of the fine separation cavity; the minimum pressure valve is mechanical.

[0017] A scroll compressor includes the above-mentioned oil and gas separation device, a cross slide ring, an oil seal assembly, a crankshaft, an air inlet connecting piece, an air inlet valve assembly and a motor; the moving disk is connected to the fuselage through the cross slide ring; the center of the moving disk is connected to the eccentric shaft section on the crankshaft, the middle part of the crankshaft is rotatably arranged in the crankshaft connecting hole in the middle of the fuselage through a bearing, and an oil seal assembly is arranged between the crankshaft and the fuselage; the end of the crankshaft is arranged in the motor; the air inlet valve assembly is arranged on the outer side surface of the rear cover plate, and an air inlet connecting piece is arranged at the position corresponding to the air inlet valve assembly on the inner side surface of the rear cover plate. The air inlet connecting piece sequentially passes through the secondary separation cover plate and the coarse separation cover plate and is connected to the air inlet on the static disk, and the air inlet is communicated with the compression chamber.

[0018] Preferably, an oil outlet communicating with the oil sump and a return channel for the cooled lubricating oil to flow back are provided at the lower part of the body; a return oil inlet, a first return outlet and a second return outlet are provided on the return channel; a cooling oil channel is provided on the stationary disk, and the inlet of the cooling oil channel communicates with the first return outlet; the outlet of the cooling oil channel is located in the compression chamber; the second return outlet is provided on the crankshaft connection hole in the middle of the body; a radiator is provided between the body and the motor; the outer circumference of the radiator is an air inlet, and the inner circumference is an air outlet; a plurality of heat dissipation fins are provided in the radiator, an oil channel is provided between the heat dissipation fins, the oil inlet hole of the oil channel communicates with the oil outlet, and the oil outlet hole of the oil channel communicates with the return oil inlet; a fixed support is provided on the inner side of the radiator, and the fixed support is a hollow structure; one side of the fixed support is fixedly connected to the body, and the shape of this side matches the shape of the inner side of the radiator; a connecting flange is provided on the other side of the fixed support, and the connecting flange is fixedly provided on the outer shell of the motor; a plurality of radial air outlets are provided on the outer circumference of the connecting flange; a wind blade is provided on the crankshaft at the position of the connecting flange.

[0019] In summary, the advantages of the present invention are as follows:

[0020] 1. The gas discharged from the compression chamber sequentially passes through the rough separation chamber, the secondary separation chamber, the cavity and the fine separation chamber. The gas is filtered multiple times through the above separation chambers to improve the oil-gas separation effect; in the rough separation chamber, the secondary separation chamber and the cavity, the gas flow path is extended through the air guiding ribs to further improve the oil-gas separation effect; in the rough separation chamber, the secondary separation chamber and the cavity, the separated oil flows back to the oil sump under the action of gravity. In the fine separation chamber, the filtered oil flows back into the compression chamber under the action of the negative pressure in the compression chamber.

[0021] 2. The oil-gas barrel is cancelled to make the structure of the machine more compact, and the complex pipe network structure is cancelled to reduce the vulnerable parts of the machine and lower the maintenance cost of the machine.

[0022] 3. The circulating path of the lubricating oil inside the machine head is short, reducing the amount of lubricating oil used, improving the use efficiency of the lubricating oil, and moreover, the contact area between the lubricating oil and the air inside the machine head is small, reducing the probability of emulsification of the lubricating oil.

[0023] 4. The structure inside the machine head has a sound absorption effect, and the noise of the whole machine is significantly reduced.

[0024] 5. The usage amount of electronic control components is reduced, reducing the failure rate of the whole machine and the manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic structural diagram of a scroll compressor.

[0026] Figure 2 It is an exploded structural diagram of a scroll compressor.

[0027] Figure 3Schematic diagram of the structure on the side of the stationary disk away from the vortex part.

[0028] Figure 4 Schematic diagram of the structure on the side of the stationary disk with the vortex part.

[0029] Figure 5 Schematic diagram of the structure of the coarse separation cover plate and the stationary disk.

[0030] Figure 6 Schematic diagram of the coarse separation process.

[0031] Figure 7 Schematic diagram of the structure of the rear cover plate and the secondary separation cover plate.

[0032] Figure 8 Schematic diagram of the secondary separation process.

[0033] Figure 9 Schematic diagram of the structure on the outside of the rear cover plate.

[0034] Figure 10 Schematic diagram of the structure of the rear cover plate and the components installed thereon.

[0035] Figure 11 For Figure 10 Cross-sectional view taken at A-A in

[0036] Figure 12 Schematic diagram of the structure inside the fuselage.

[0037] Figure 13 Schematic diagram of the structure outside the fuselage.

[0038] Figure 14 Exploded schematic diagram of the radiator, fixed bracket, connecting flange, fan blade and crankshaft. Detailed implementation manner

[0039] Such as Figures 1 to 6As shown in the figure, an oil-gas rough separation device for a scroll compressor includes a rough separation cover plate 5, a stationary disk 6, a moving disk 7, and a housing 9. The rough separation cover plate 5, the stationary disk 6, and the moving disk 7 are all located inside the housing 9. An oil sump is provided at the lower part inside the housing 9. The stationary disk 6 is fixedly arranged on the housing 9. The moving disk 7 is cooperatively arranged on the scroll part on one side of the stationary disk 6, and a compression chamber is formed between the moving disk 7 and the stationary disk 6. An annular outer ring 601, a first air guiding rib 602, an oil return seat 603, and an air inlet seat 604 are arranged on the end surface on the other side of the stationary disk 6. The annular outer ring 601 is arranged along the outer edge of the stationary disk 6, and a rough separation cover plate mounting hole 6011 is arranged on the annular outer ring 601. The rough separation cover plate 5 is connected to the rough separation cover plate mounting hole 6011 through a bolt 20. A rough separation chamber is formed between the annular outer ring 601 and the rough separation cover plate 5. The first air guiding rib 602 is arc-shaped and is located inside the annular outer ring 601. The length of the first air guiding rib 602 along the axial direction of the stationary disk 6 is the same as that of the annular outer ring 601, so that the rough separation cover plate 5 is in contact with both the annular outer ring 601 and the first air guiding rib 602 at the same time, thus defining a unique air flow channel. The oil return seat 603 and the air inlet seat 604 are formed by the first air guiding rib 602. The oil return seat 603 is arranged at the upper part of the stationary disk 6, and the air inlet seat 604 is arranged at the lower part of the stationary disk 6. A notch is left at the lower part of the annular outer ring 601, and the air inlet seat 604 or the first air guiding rib 602 divides the notch into a rough separation exhaust port 605 and a first lower oil port 606. The opening of the first air guiding rib 602 faces the first lower oil port 606, and the first lower oil port 606 is communicated with the oil sump and is sealed by lubricating oil. A rough separation air inlet 607 communicating with the compression chamber is arranged in the middle of the first air guiding rib 602. An air flow channel is formed between the outer side of the first air guiding rib 602 and the inner side of the annular outer ring 601. One end of the air flow channel is communicated with the rough separation air inlet 607, and the other end is communicated with the rough separation exhaust port 605.

[0040] During rough separation, the gas in the compression chamber enters the rough separation chamber through the rough separation air inlet 607, and moves from the inner side of the first air guiding rib 602 to the outer side of the first air guiding rib 602. Under the guidance of the first air guiding rib 602, the air flow flows clockwise along the air flow channel between the first air guiding rib 602 and the annular outer ring 601, and finally discharges from the rough separation exhaust port 605. The lubricating oil in the gas falls on the rough separation cover plate 5 and the first air guiding rib 602, and finally flows back to the oil sump under the action of gravity.

[0041] As Figures 1 to 11As shown in the figure, an oil-gas separation device for a scroll compressor, which includes the above-mentioned oil-gas rough separation device, an oil-gas fine separation assembly 1, a rear cover plate 2, and a secondary separation cover plate 3. The secondary separation cover plate 3 is located inside the body 9. The rear end of the body 9 is fixedly provided with a rear cover plate 2 by bolts. A secondary separation cavity is formed between the rear cover plate 2 and the body 9, and the rough separation exhaust hole 605 is communicated with the secondary separation cavity. An arc-shaped second air guide rib 201 is provided on the inner end face of the rear cover plate 2, and a secondary separation cover plate mounting hole 2011 is provided on the second air guide rib 201. The secondary separation cover plate 3 is fixedly installed on the secondary separation cover plate mounting hole 2011 by bolts. A cavity is formed between the second air guide rib 201 and the secondary separation cover plate 3. A cavity air inlet 202 communicating with the secondary separation cavity is provided on one side of the second air guide rib 201, and a cavity air outlet 203 penetrating through the rear cover plate 2 is provided on the inner side of the second air guide rib 201. A second lower oil port 206 is provided at the bottom of the second air guide rib 201. The lubricating oil after secondary separation flows back to the oil sump through the second air guide rib 201 and the secondary separation cover plate 3.

[0042] During the secondary separation process, the gas enters the secondary separation cavity from the rough separation exhaust hole 605, moves clockwise along the outside of the second air guide rib 201, enters the cavity through the cavity air inlet 202, continues to flow along the inner side of the second air guide rib 201, and finally enters the cavity air outlet 203. The lubricating oil in the gas flows into the oil sump under the action of the secondary separation cover plate 3 and the second air guide rib 201. The shape of the second air guide rib 201 can effectively extend the path of air flow and improve the oil-gas separation effect.

[0043] As Figures 9 to 11As shown in the figure, an oil-gas separation seat 204 is arranged on the outer side of the rear cover plate 2, and an oil-gas fine separation component 1 is arranged on the oil-gas separation seat 204. A fine separation chamber is formed between the oil-gas fine separation component 1 and the oil-gas separation seat 204. The fine separation chamber is provided with an air inlet end and an air outlet end. The air inlet end of the fine separation chamber is communicated with the cavity air outlet 203. A minimum pressure valve 17 is arranged at the outlet end of the fine separation chamber. The minimum pressure valve 17 is mechanical. When the pressure at the outlet reaches the rated pressure, the minimum pressure valve 17 opens and starts to exhaust. The oil-gas fine separation component 1 includes an oil separation core rod 101, an oil separation core 102 and an oil separation core cover 103. The lower part of the oil separation core rod 101 is connected with the cavity air outlet 203. The oil separation core 102 is coated on the outer side of the oil separation core rod 101, and the material of the oil separation core 102 is cotton. The oil separation core cover 103 is arranged on the outer side of the oil separation core 102, and the oil separation core cover 103 is arranged on the oil-gas separation seat 204. A return oil hole 6031 is arranged on the return oil seat 603. A one-way return oil component installation hole 205 penetrating through the inner and outer sides of the rear cover plate 2 is arranged at the lower part of the oil-gas separation seat 204. A one-way return oil component 4 is arranged in the one-way return oil component installation hole 205. The end of the one-way return oil component 4 passes through the return oil hole 6031 and extends into the compression chamber. The one-way return oil component 4 is used to guide the lubricating oil after fine separation back to the compression chamber. A small hole for installing a one-way valve, four O-ring installation grooves and a limit step are formed inside the one-way return oil component 4.

[0044] During fine separation, the gas enters the oil-gas fine separation component 1 from the cavity air outlet 203 and moves along the oil separation core rod 101. Under the action of the oil separation core 102, the gas is filtered. The filtered gas enters the outlet of the fine separation chamber. When the pressure at the outlet reaches the rated pressure, the minimum pressure valve 17 opens and starts to exhaust. The filtered oil flows downward to the inlet of the one-way return oil component 4 and flows back into the compression chamber under the action of the negative pressure in the compression chamber.

[0045] The oil-gas separation device has the following advantages:

[0046] 1. The gas discharged from the compression chamber passes through the rough separation chamber, the secondary separation chamber, the cavity and the fine separation chamber in sequence. The gas is filtered multiple times through the above separation chambers, improving the oil-gas separation effect; in the rough separation chamber, the secondary separation chamber and the cavity, the gas flow path is extended through the air guiding ribs, further improving the oil-gas separation effect; in the rough separation chamber, the secondary separation chamber and the cavity, the separated oil flows back into the oil sump under the action of gravity. In the fine separation chamber, the filtered oil flows back into the compression chamber under the action of the negative pressure in the compression chamber.

[0047] 2. The oil-gas barrel is cancelled, making the structure of the machine more compact. The complex pipe network structure is cancelled, reducing the vulnerable parts of the machine and lowering the maintenance cost of the machine.

[0048] 3. The lubricating oil has a short circulation path inside the head, reducing the amount of lubricating oil used and improving the lubricating oil utilization efficiency. Moreover, the lubricating oil has a small contact area with air inside the head, reducing the probability of lubricating oil emulsification.

[0049] 4. The structure inside the head has a sound absorption effect, significantly reducing the noise of the whole machine.

[0050] 5. The usage amount of electronic control components is reduced, lowering the failure rate and manufacturing cost of the whole machine.

[0051] As Figures 1 to 14 shown, a scroll compressor includes the above-mentioned oil-gas separation device, a cross slip ring 8, an oil seal assembly 13, a crankshaft 15, an air inlet connecting piece 16, an air inlet valve assembly 19, and a motor 21. The moving disk 7 is connected to the body 9 through the cross slip ring 8. The center of the moving disk 7 is connected to the eccentric shaft section on the crankshaft 15. The middle part of the crankshaft 15 is rotatably arranged on the crankshaft connecting hole 93 in the middle part of the body 9 through a bearing 12, and an oil seal assembly 13 is arranged between the crankshaft 15 and the body 9 for sealing the lubricating oil inside the body 9. The end of the crankshaft 15 is arranged inside the motor 21, and the crankshaft 15 is driven by the motor 21. An air inlet valve assembly 19 is arranged on the outer side surface of the rear cover plate 2, and an air inlet connecting piece 16 is arranged at a position corresponding to the air inlet valve assembly 19 on the inner side surface of the rear cover plate 2. The air inlet connecting piece 16 passes through the secondary separation cover plate 3 and the coarse separation cover plate 5 and is connected to the air inlet seat 604 on the stationary disk 6. The air inlet seat 604 is provided with an air inlet 6041 communicating with the compression chamber, and the air inlet connecting piece 16 is used for inwardly conveying the air introduced by the air inlet valve assembly 19 into the compression chamber. An oil sight glass 18 for observing the liquid level height of the oil sump inside the body 9 and a pressure gauge 22 for detecting the air pressure inside the body 9 are arranged on the rear cover plate 2. A temperature sensor 10 and a lifting ring 11 are arranged on the top of the body 9.

[0052] As Figure 12 and Figure 13 shown, an oil outlet 91 communicating with the oil sump and a return channel 92 for the cooled lubricating oil to flow back are arranged at the lower part of the body 9. A return oil inlet 921, a first return outlet 922, and a second return outlet 923 are arranged on the return channel 92. As Figures 3 to 5 shown, a cooling oil channel 608 is arranged on the stationary disk 6. The inlet 6081 of the cooling oil channel 608 is communicated with the first return outlet 922, and the outlet 6082 of the cooling oil channel 608 is located inside the compression chamber. The cooling oil channel 608 is used for introducing the cooled lubricating oil into the compression chamber. The second return outlet 923 is arranged on the crankshaft connecting hole 93 in the middle part of the body 9 for supplying the cooled lubricating oil to the crankshaft 15 and its bearing 12.

[0053] As Figure 14As shown, a radiator 14 is provided between the fuselage 9 and the motor 21. The outer circumference of the radiator 14 is the air inlet, and the inner circumference is the air outlet. A number of heat dissipation fins are provided inside the radiator 14, and an oil passage is provided between the heat dissipation fins. The oil inlet hole 1401 of the oil passage is communicated with the oil outlet 91, and the oil outlet hole 1402 of the oil passage is communicated with the return oil inlet 921. Since the pressure at the compression chamber and the crankshaft connection hole 93 is lower than the pressure inside the fuselage, the oil in the oil sump enters the oil passage through the oil outlet 91. The lubricating oil entering the oil passage is cooled by the heat dissipation fins and then discharged from the oil outlet hole 1402 and returned to the return passage 92. Since the radiator is annular, the path of the oil passage is extended, which is beneficial to the cooling of the lubricating oil.

[0054] A fixed bracket 23 is provided inside the radiator 14. The fixed bracket 23 is a hollow structure. One side of the fixed bracket 23 is fixedly connected to the fuselage 9, and the shape of this side matches the shape of the inner side of the radiator 14. A connecting flange 24 is provided on the other side of the fixed bracket 23. The connecting flange 24 is fixedly arranged on the outer shell of the motor 21. A plurality of radial air outlets 2401 are provided on the outer circumference of the connecting flange 24. A wind blade 25 is provided on the crankshaft 15 at the position of the connecting flange 24.

[0055] During operation, the crankshaft 15 drives the compressor head and the wind blade 25 to act simultaneously. Inside the head, the compression chamber and the crankshaft connection hole 93 are low-pressure areas, and the inside of the fuselage is a high-pressure area. Therefore, the lubricating oil in the head enters the inside of the radiator 14 under the action of the pressure difference. The wind blade 25 extracts the air inside the radiator 14, so that the cold air enters the inside of the radiator from the outer circumference of the radiator 14 to cool the oil inside the radiator 14, and the hot air is discharged from the radial air outlets 2401. The cooled lubricating oil flows back into the head.

[0056] The advantage of the heat dissipation structure is that the wind blade 25 is directly arranged on the crankshaft 15, so that the radiator 14 and the head act synchronously. The shape of the radiator 14 is annular, which increases the cooling path of the oil and improves the heat dissipation effect.

Claims

1. An oil-gas separation device for a scroll compressor, characterized in that, It includes an oil and gas fine separation component (1), a rear cover plate (2), a secondary separation cover plate (3), a rough separation cover plate (5), a static disk (6), a moving disk (7) and a fuselage (9); the secondary separation cover plate (3), the rough separation cover plate (5), the static disk (6) and the moving disk (7) are all located inside the fuselage (9); an oil sump is provided at the lower part inside the fuselage (9); the static disk (6) is fixedly arranged on the fuselage (9); the moving disk (7) is cooperatively arranged on the vortex part on one side of the static disk (6), and a compression chamber is formed between the moving disk (7) and the static disk (6); an annular outer ring (601) and a first air guiding rib (602) are arranged on the end face on the other side of the static disk (6); the annular outer ring (601) is arranged along the outer edge of the static disk (6), and the rough separation cover plate (5) is arranged on the annular outer ring (601), so that a rough separation chamber is formed between the annular outer ring (601) and the rough separation cover plate (5); the first air guiding rib (602) is arc-shaped and is located inside the annular outer ring (601); a notch is left at the lower part of the annular outer ring (601), and the first air guiding rib (602) divides the notch into a rough separation exhaust port (605) and a first oil drain port (606); the first oil drain port (606) is located below the rough separation exhaust port (605); the opening of the first air guiding rib (602) faces the first oil drain port (606), and the first oil drain port (606) is communicated with the oil sump and is sealed by lubricating oil; a rough separation air inlet (607) communicating with the compression chamber is provided in the middle of the first air guiding rib (602), and an air flow channel is formed between the outer side of the first air guiding rib (602) and the inner side of the annular outer ring (601), one end of the air flow channel is communicated with the rough separation air inlet (607), and the other end is communicated with the rough separation exhaust port (605); A rear cover plate (2) is arranged at the tail of the fuselage (9), a secondary separation chamber is formed between the rear cover plate (2) and the fuselage (9), and the rough separation exhaust port (605) is communicated with the secondary separation chamber; a second air guiding rib (201) is arranged on the inner end face of the rear cover plate (2), and the secondary separation cover plate (3) is arranged on the second air guiding rib (201); a cavity is formed between the second air guiding rib (201) and the secondary separation cover plate (3), a cavity air inlet (202) communicating with the secondary separation chamber is arranged on one side part of the second air guiding rib (201), and a cavity air outlet (203) penetrating through the rear cover plate (2) is arranged on the inner side of the second air guiding rib (201); a second oil drain port (206) is arranged at the bottom of the second air guiding rib (201); An oil and gas separation seat (204) is arranged on the outer side of the rear cover plate (2), an oil and gas fine separation component (1) is arranged on the oil and gas separation seat (204), and a fine separation chamber is formed between the oil and gas fine separation component (1) and the oil and gas separation seat (204); the fine separation chamber is provided with an air inlet end and an air outlet end; the air inlet end of the fine separation chamber is communicated with the cavity air outlet (203); The stationary disk (6) is provided with an oil return seat (603). An oil return hole (6031) is arranged in the oil return seat (603), and the oil return hole (6031) communicates with the compression chamber; the first air guiding rib (602) forms the oil return seat (603) and the air inlet seat (604); the oil return seat (603) is arranged on the upper part of the stationary disk (6), and the air inlet seat (604) is arranged on the lower part of the stationary disk (6); the air inlet seat (604) divides the notch into a rough separation exhaust port (605) and a first oil outlet (606).

2. The oil-gas separation device of a scroll compressor according to claim 1, characterized in that, A rough separation cover plate mounting hole (6011) is arranged on the annular outer ring (601), and the rough separation cover plate (5) is connected to the rough separation cover plate mounting hole (6011) through bolts (20); the length of the first air guiding rib (602) along the axial direction of the stationary disk (6) is the same as that of the annular outer ring (601).

3. The oil-gas separation device of a scroll compressor according to claim 1, characterized in that, The oil and gas fine separation assembly (1) includes an oil separation core rod (101), an oil separation core (102) and an oil separation core cover (103); the lower part of the oil separation core rod (101) is connected to the cavity air outlet (203); the oil separation core (102) is covered and arranged on the outer side of the oil separation core rod (101), the oil separation core cover (103) is arranged on the outer side of the oil separation core (102), and the oil separation core cover (103) is arranged on the oil and gas separation seat (204).

4. The oil-gas separation device of a scroll compressor according to claim 3, characterized in that, The material of the oil separation core (102) is cotton.

5. An oil-gas separation device for a scroll compressor according to claim 1, characterized in that, A one-way oil return assembly mounting hole (205) penetrating through the rear cover plate (2) is arranged at the lower part of the oil and gas separation seat (204). A one-way oil return assembly (4) is arranged in the one-way oil return assembly mounting hole (205), and the outlet end of the one-way oil return assembly (4) extends into the compression chamber through the oil return hole (6031).

6. The oil-gas separation device of a scroll compressor according to claim 1, characterized in that, A secondary separation cover plate mounting hole (2011) is arranged on the second air guiding rib (201), and the secondary separation cover plate (3) is fixedly installed on the secondary separation cover plate mounting hole (2011) through bolts.

7. The oil-gas separation device of a scroll compressor according to claim 1, characterized in that A minimum pressure valve (17) is arranged at the outlet end of the fine separation cavity; the minimum pressure valve (17) is mechanical.

8. A scroll compressor, characterized in that, It includes the oil and gas separation device according to any one of claims 1 to 7, as well as a cross slip ring (8), an oil seal assembly (13), a crankshaft (15), an air inlet connector (16), an air inlet valve assembly (19) and a motor (21); the moving disk (7) is connected to the fuselage (9) through the cross slip ring (8); the center of the moving disk (7) is connected to the eccentric shaft section on the crankshaft (15). The middle part of the crankshaft (15) is rotatably arranged on the crankshaft connection hole (93) in the middle of the fuselage (9) through a bearing (12), and an oil seal assembly (13) is arranged between the crankshaft (15) and the fuselage (9); the end of the crankshaft (15) is arranged inside the motor (21); the air inlet valve assembly (19) is arranged on the outer side surface of the rear cover plate (2), and the air inlet connector (16) is arranged at the position corresponding to the air inlet valve assembly (19) on the inner side surface of the rear cover plate (2). The air inlet connector (16) sequentially passes through the secondary separation cover plate (3) and the rough separation cover plate (5) and is connected to the air inlet (6041) on the stationary disk (6), and the air inlet (6041) communicates with the compression chamber.

9. A scroll compressor according to claim 8, characterized in that, At the lower part of the fuselage (9), there is an oil outlet (91) communicating with the oil sump and a return channel (92) for the cooled lubricating oil to flow back; on the return channel (92), there are a return inlet (921), a first return outlet (922) and a second return outlet (923); on the static disk (6), there is a cooling oil channel (608), and the inlet (6081) of the cooling oil channel (608) communicates with the first return outlet (922); the outlet (6082) of the cooling oil channel (608) is located in the compression chamber; the second return outlet (923) is arranged on the crankshaft connection hole (93) in the middle of the fuselage (9); a radiator (14) is arranged between the fuselage (9) and the motor (21); the outer circumference of the radiator (14) is an air inlet, and the inner circumference is an air outlet; several heat dissipation fins are arranged in the radiator (14), and an oil channel is arranged between the heat dissipation fins. The oil inlet hole (1401) of the oil channel communicates with the oil outlet (91), and the oil outlet hole (1402) of the oil channel communicates with the return inlet (921); a fixed support (23) is arranged on the inner side of the radiator (14), and the fixed support (23) is of a hollow structure; one side of the fixed support (23) is fixedly connected to the fuselage (9), and the shape of this side matches the shape of the inner side of the radiator (14); on the other side of the fixed support (23), there is a connecting flange (24), and the connecting flange (24) is fixedly arranged on the outer shell of the motor (21); a plurality of radial air outlets (2401) are arranged on the outer circumference of the connecting flange (24); a wind blade (25) is arranged on the crankshaft (15) at the position of the connecting flange (24).

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