A scroll compressor and its lubricating oil cooling device

Abstract

The present invention relates to the field of scroll compressors, in particular to a scroll compressor and its lubricating oil heat dissipation device, which includes a stationary disk, a body, and a radiator; an oil sump is provided at the lower part inside the body, a radiator is arranged on one side of the body, a number of heat dissipation fins are arranged inside the radiator, an oil passage is arranged between the heat dissipation fins, and an oil inlet hole and an oil outlet hole are arranged on the oil passage; an oil outlet communicating with the oil sump is provided at the lower part of the body, and a return passage for the cooled lubricating oil to flow back is provided; a return oil inlet, a first return outlet, and a second return outlet are arranged on the return passage; the oil outlet communicates with the oil inlet hole on the radiator; the return oil inlet communicates with the oil outlet hole on the radiator; a cooling oil passage is arranged on the stationary disk, and the inlet of the cooling oil passage communicates with the first return outlet; the outlet of the cooling oil passage is located inside the scroll part of the stationary disk; the second return outlet is arranged on the crankshaft connection hole in the middle of the body. This patent does not require an oil pump to transport the lubricating oil, the lubricating oil transportation path is short, and it saves oil.

Description

Technical Field

[0001] The present invention relates to the field of scroll compressors, and particularly to a scroll compressor and a lubricating oil cooling 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, and 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 operation 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 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, resulting in a relatively high temperature of the lubricating oil inside the compressor, and it is necessary to cool the lubricating oil inside the body.

[0003] Existing lubricating oil cooling devices, for example, a Chinese invention patent (publication number: CN110118175A, publication date: 20190813) discloses a scroll compressor with oil cooling, including a bearing assembly, a compressor oil sump, an oil pump, a main bearing oil sump, and an air inlet. It also includes a cooler arranged at the air inlet. The cooler is provided with an internal oil passage and a ventilation groove. The internal oil passage is in fluid communication with the main bearing oil sump and is isolated from the air inlet. The refrigerant inhaled through the air inlet flows into the compressor interior after passing through the ventilation groove. When the compressor is running, the lubricating oil from the compressor oil sump is pumped to the bearing assembly by the oil pump, and then at least a part of the lubricating oil in the lubricating oil flows into the main bearing oil sump. The lubricating oil in the main bearing oil sump is introduced into the cooler for cooling, and finally flows back to the compressor oil sump. By arranging a cooler at the air inlet of the compressor and introducing the oil in the main bearing oil sump into the cooler, the relatively low-temperature inhaled refrigerant is used to cool and lower the temperature of the lubricating oil, effectively improving the load-bearing capacity of the lubricating oil.

[0004] The above device needs to additionally increase an oil pump to send the cooled oil back to the bearing assembly and the oil sump, and the lubricating oil circulation path is relatively long, resulting in a large amount of lubricating oil required for the equipment. Summary of the Invention

[0005] To solve the above problems, the object of the present invention is to provide a scroll compressor and its lubricating oil heat dissipation device. An oil outlet communicating with the oil sump is provided at the lower part of the body. Under the action of the high-pressure air in the body, the lubricating oil in the oil sump is pressed into the oil inlet hole of the radiator through the oil outlet. After the oil is cooled in the radiator, it is discharged from the oil outlet hole. The discharged oil is transported to the compression chamber with a lower pressure and the crankshaft connection hole, and the circulation of the lubricating oil is realized through the pressure difference in the body, and the path of the lubricating oil transportation in the body is short.

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

[0007] A lubricating oil heat dissipation device for a scroll compressor, comprising a stationary disk, a body and a radiator; the stationary disk is fixedly arranged on the body; an oil sump is arranged at the lower part inside the body, a radiator is arranged on one side of the body, a plurality of heat dissipation fins are arranged inside the radiator, an oil passage is arranged between the heat dissipation fins, and an oil inlet hole and an oil outlet hole are arranged on the oil passage; an oil outlet communicating with the oil sump and a return passage for the cooled lubricating oil to flow back are arranged at the lower part of the body; a return oil inlet, a first return outlet and a second return outlet are arranged on the return passage; the oil outlet is communicated with the oil inlet hole on the radiator; the return oil inlet is communicated with the oil outlet hole on the radiator; a cooling oil passage is arranged on the stationary disk, and the inlet of the cooling oil passage is communicated with the first return outlet; the outlet of the cooling oil passage is located inside the scroll part of the stationary disk; the second return outlet is arranged on the crankshaft connection hole in the middle of the body.

[0008] Preferably, the radiator is annular, the outer circumference is an air inlet, and the inner circumference is an air outlet; a fixed support is arranged inside the radiator, and the fixed support is a hollow structure; one side of the fixed support is fixedly connected with the body, and the shape of this side matches the shape inside the radiator; a connecting flange is arranged on the other side of the fixed support, and a plurality of radial air outlets are arranged on the outer circumference of the connecting flange; a wind blade is arranged inside the connecting flange, the wind blade is fixedly installed on the crankshaft, the crankshaft is rotatably arranged in the crankshaft connection hole in the middle of the body through a bearing, and the crankshaft is connected with the motor.

[0009] Preferably, the other side of the connecting flange is fixedly arranged on the outer shell of the motor.

[0010] Preferably, an oil seal assembly is also arranged between the body and the crankshaft.

[0011] A scroll compressor, comprising the above-mentioned lubricating oil heat dissipation device, a moving disk, a crankshaft and a motor; the moving disk is arranged on the scroll part on one side of the stationary disk in a matching manner, and a compression chamber is formed between the moving disk and the stationary disk; the moving disk is connected with the body through a cross slip ring; the center of the moving disk is connected with the eccentric shaft section on the crankshaft; the crankshaft is rotatably arranged in the crankshaft connection hole in the middle of the body through a bearing, and an oil seal assembly is arranged between the crankshaft and the body; the crankshaft is connected with the motor.

[0012] Preferably, the compressor further includes an oil-gas fine separation component, a rear cover plate, a secondary separation cover plate, and a rough separation cover plate; the secondary separation cover plate and the rough separation cover plate are located inside the fuselage; an annular outer ring and a first air guide rib are provided on the end face of one side of the static disk; the annular outer ring is arranged along the outer edge of the static disk, and the rough separation cover plate is arranged on the annular outer ring, so that a rough separation chamber is formed between the annular outer ring and the rough separation cover plate; the first air guide 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 guide rib divides the notch into a rough separation exhaust port and a first oil drain port; the first oil drain port is located below the rough separation exhaust port; the opening of the first air guide 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 rough separation air inlet communicating with the compression chamber is provided in the middle of the first air guide rib, and an air flow channel is formed between the outer side of the first air guide rib and the inner side of the annular outer ring. One end of the air flow channel communicates with the rough separation air inlet, and the other end communicates with the rough separation exhaust port.

[0013] A rear cover plate is provided at the tail of the fuselage. A secondary separation chamber is formed between the rear cover plate and the fuselage, and the rough separation exhaust hole communicates with the secondary separation chamber; a second air guide rib is provided on the inner end face of 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. A cavity air inlet communicating with the secondary separation chamber is provided on one side of the second air guide rib, and a cavity air outlet penetrating the rear cover plate is provided on the inner side of the second air guide rib; a second oil drain port is provided at the bottom of the second air guide rib.

[0014] An oil-gas separation seat is arranged on the outer side 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.

[0015] Preferably, the oil-gas fine separation component 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, and the oil separation core cover is arranged on the outer side of the oil separation core. The oil separation core cover is arranged on the oil-gas separation seat.

[0016] Preferably, an oil return seat is provided on the static disk, an oil return hole is provided in the oil return seat, and the oil return hole communicates with the compression chamber; a one-way oil return component installation hole penetrating the rear cover plate is provided at the lower part of the oil-gas separation seat, a one-way oil return component is arranged in the one-way oil return component installation hole, and the outlet end of the one-way oil return component extends into the compression chamber through the oil return hole.

[0017] Preferably, a minimum pressure valve is provided at the outlet end of the fine separation chamber; the minimum pressure valve is mechanical.

[0018] Preferably, the compressor further includes an air inlet connector and an air inlet valve assembly; the air inlet valve assembly is arranged on the outer side of the rear cover plate, and the air inlet connector is arranged at a position corresponding to the air inlet valve assembly on the inner side of the rear cover plate. The air inlet connector sequentially passes through the secondary separation cover plate and the coarse separation cover plate and is connected to the air inlet on the static plate, and the air inlet communicates with the compression chamber.

[0019] In summary, the advantages of the present invention are as follows: an oil outlet communicating with the oil sump is provided at the lower part of the fuselage. Under the action of the high-pressure air in the fuselage, the lubricating oil in the oil sump is pressed into the oil inlet hole of the radiator through the oil outlet. After the oil is cooled in the radiator, it is discharged from the oil outlet hole. The discharged oil is transported to the compression chamber with a lower pressure and the crankshaft connection hole, and the circulation of the lubricating oil is realized through the pressure difference in the fuselage. Moreover, the transmission path of the lubricating oil in the fuselage is short and less lubricating oil is required. The radiator is annular, which is beneficial to extending the path during cooling and improving the cooling effect. The fan blade is directly installed on the crankshaft, so that the compressor head and the radiator work simultaneously, maintaining good consistency and being beneficial to improving the cooling effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic structural diagram of a scroll compressor.

[0021] Figure 2 It is an exploded structural diagram of a scroll compressor.

[0022] Figure 3 It is a schematic structural diagram of the side of the static plate away from the scroll part.

[0023] Figure 4 It is a schematic structural diagram of the side of the static plate with the scroll part.

[0024] Figure 5 It is a schematic structural diagram of the coarse separation cover plate and the static plate.

[0025] Figure 6 It is a schematic diagram of the coarse separation process.

[0026] Figure 7 It is a schematic structural diagram of the rear cover plate and the secondary separation cover plate.

[0027] Figure 8 It is a schematic diagram of the secondary separation process.

[0028] Figure 9 It is a schematic structural diagram of the outer side of the rear cover plate.

[0029] Figure 10 It is a schematic structural diagram of the rear cover plate and the components installed thereon.

[0030] Figure 11 For Figure 10 The sectional view taken along line A-A in

[0031] Figure 12 It is a schematic diagram of the internal structure of the fuselage.

[0032] Figure 13 It is a schematic diagram of the external structure of the fuselage.

[0033] Figure 14 It is an exploded schematic diagram of the radiator, fixed bracket, connecting flange, fan blade and crankshaft. Specific implementation mode

[0034] As Figures 1 to 6 shown, an oil-gas rough separation device of a scroll compressor includes a rough separation cover plate 5, a stationary disk 6, a moving disk 7 and a fuselage 9. The rough separation cover plate 5, the stationary 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 stationary disk 6 is fixedly arranged on the fuselage 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 face 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 oil outlet 606. The opening of the first air guiding rib 602 faces the first oil outlet 606, and the first oil outlet 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.

[0035] 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.

[0036] As shown Figures 1 to 11 in the figure, an oil-gas separation device for a scroll compressor 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. A rear cover plate 2 is fixedly arranged at the tail of the body 9 through bolts. A secondary separation cavity is formed between the rear cover plate 2 and the body 9, and the rough separation exhaust hole 605 communicates with the secondary separation cavity. An arc-shaped second air guide rib 201 is arranged on the inner end surface of the rear cover plate 2. A secondary separation cover plate mounting hole 2011 is arranged 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 through 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 arranged on one side of the second air guide 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 guide rib 201. A second lower oil port 206 is arranged 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.

[0037] During the secondary separation process, the gas enters the secondary separation cavity from the rough separation exhaust hole 605, moves clockwise along the outer side 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.

[0038] As shown Figures 9 to 11As shown in the figure, an oil-gas separation seat 204 is provided on the outer side of the rear cover plate 2, and an oil-gas fine separation component 1 is provided 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 provided 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 to 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 provided on the outer side of the oil separation core 102, and the oil separation core cover 103 is provided on the oil-gas separation seat 204. A return oil hole 6031 is provided 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 provided at the lower part of the oil-gas separation seat 204. A one-way return oil component 4 is provided 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 into the compression chamber. A small hole for installing a one-way valve, four O-ring installation grooves, and a limiting step are provided inside the one-way return oil component 4.

[0039] 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.

[0040] The oil-gas separation device has the following advantages:

[0041] 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.

[0042] 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.

[0043] 3. The lubricating oil has a short circulation path inside the head, reducing the amount of lubricating oil used and improving the lubricating oil usage efficiency. Moreover, the lubricating oil has a small contact area with air inside the head, reducing the probability of lubricating oil emulsification.

[0044] 4. The structure inside the head has a sound absorption effect, significantly reducing the noise of the whole machine.

[0045] 5. The usage of electronic control components is reduced, decreasing the failure rate and manufacturing cost of the whole machine.

[0046] As Figures 1 to 14 shown, a scroll compressor includes the above-mentioned oil-gas separation device, cross slip ring 8, oil seal assembly 13, crankshaft 15, air inlet connecting piece 16, air inlet valve assembly 19, and 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 of the body 9 through a bearing 12, and an oil seal assembly 13 is arranged between the crankshaft 15 and the body 9 to seal 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. The air inlet valve assembly 19 is arranged on the outer side surface of the rear cover plate 2, and the air inlet connecting piece 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 connecting piece 16 passes through the secondary separation cover plate 3 and the rough separation cover plate 5 and is connected to the air inlet seat 604 on the static 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 to convey the air introduced by the air inlet valve assembly 19 inward 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.

[0047] 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. The return channel 92 is provided with a return oil inlet 921, a first return outlet 922, and a second return outlet 923. As Figures 3 to 5 shown, a cooling oil channel 608 is arranged on the static 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 to introduce the cooled lubricating oil into the compression chamber. The second return outlet 923 is arranged on the crankshaft connecting hole 93 in the middle of the body 9 to supply the cooled lubricating oil to the crankshaft 15 and its bearing 12.

[0048] 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 an air inlet, and the inner circumference is an 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.

[0049] A fixed support 23 is provided inside the radiator 14. The fixed support 23 is 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. A connecting flange 24 is provided on the other side of the fixed support 23. The connecting flange 24 is fixedly provided 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.

[0050] 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.

[0051] The advantage of the heat dissipation structure is that the wind blade 25 is directly provided 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. A scroll compressor, characterized in that, it includes a lubricating oil heat dissipation device, a moving disk (7), a crankshaft (15) and a motor (21); the lubricating oil heat dissipation device includes a stationary disk (6), a body (9) and a radiator (14); the stationary disk (6) is fixedly arranged on the body (9); an oil sump is arranged at the lower part inside the body (9), a radiator (14) is arranged on one side of the body (9), a plurality of heat dissipation fins are arranged inside the radiator (14), an oil passage is arranged between the heat dissipation fins, and an oil inlet hole (1401) and an oil outlet hole (1402) are arranged on the oil passage; an oil outlet (91) communicating with the oil sump is arranged at the lower part of the body (9) and a return passage (92) for the cooled lubricating oil to flow back is arranged; a return oil inlet (921), a first return outlet (922) and a second return outlet (923) are arranged on the return passage (92); the oil outlet (91) is communicated with the oil inlet hole (1401) on the radiator (14); the return oil inlet (921) is communicated with the oil outlet hole (1402) on the radiator (14); a cooling oil passage (608) is arranged on the stationary disk (6), and an inlet (6081) of the cooling oil passage (608) is communicated with the first return outlet (922); an outlet (6082) of the cooling oil passage (608) is located inside the scroll part of the stationary disk (6); the second return outlet (923) is arranged on a crankshaft connection hole (93) in the middle of the body (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); the moving disk (7) is connected with the body (9) through a cross slide ring (8); the center of the moving disk (7) is connected with an eccentric shaft section on the crankshaft (15); the crankshaft (15) is rotatably arranged in the crankshaft connection hole (93) in the middle of the body (9) through a bearing (12), and a oil seal assembly (13) is arranged between the crankshaft (15) and the body (9); the crankshaft (15) is connected with the motor (21); The compressor further includes an oil-gas fine separation assembly (1), a rear cover plate (2), a secondary separation cover plate (3), and a rough separation cover plate (5); the secondary separation cover plate (3) and the rough separation cover plate (5) are located inside the fuselage (9); an annular outer ring (601) and a first air guiding rib (602) are provided on an end face on one 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 outlet (606); the first oil outlet (606) is located below the rough separation exhaust port (605); the opening of the first air guiding rib (602) faces the first oil outlet (606), and the first oil outlet (606) is communicated with the oil sump and 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 an end face inside 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 provided 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 provided inside the second air guiding rib (201); a second oil outlet (206) is provided at the bottom of the second air guiding rib (201); An oil-gas separation seat (204) is arranged on the outer side of the rear cover plate (2), an oil-gas fine separation assembly (1) is arranged on the oil-gas separation seat (204), and a fine separation chamber is formed between the oil-gas fine separation assembly (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); The oil-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 with the cavity air outlet (203); the oil separation core (102) is coated 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-gas separation seat (204); a minimum pressure valve (17) is arranged at the outlet end of the fine separation chamber.

2. The lubricating oil heat dissipation device of a scroll compressor according to claim 1, characterized in that, The radiator (14) is annular, with an air inlet on the outer circumferential side and an air outlet on the inner circumferential side; a fixed support (23) is arranged inside 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); a connecting flange (24) is arranged on the other side of the fixed support (23), and a plurality of radial air outlets (2401) are arranged on the outer circumference of the connecting flange (24); a wind blade (25) is arranged inside the connecting flange (24), the wind blade (25) is fixedly installed on the crankshaft (15), the crankshaft (15) is rotatably arranged on the crankshaft connecting hole (93) in the middle of the fuselage (9) through a bearing (12), and the crankshaft (15) is connected to the motor (21).

3. The lubricating oil cooling device of a scroll compressor according to claim 2, characterized in that, the other side of the connecting flange (24) is fixedly arranged on the outer shell of the motor (21).

4. A scroll compressor according to claim 1, characterized in that, a return oil seat (603) is arranged on the stationary scroll (6), a return oil hole (6031) is arranged in the return oil seat (603), and the return oil hole (6031) communicates with the compression chamber; a one-way return oil component installation hole (205) penetrating 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), and the outlet end of the one-way return oil component (4) extends into the compression chamber through the return oil hole (6031).

5. A scroll compressor according to claim 1, characterized in that, the minimum pressure valve (17) is mechanical.

6. A scroll compressor according to claim 1, characterized in that, the compressor further includes an air inlet connecting piece (16) and an air inlet valve assembly (19); the air inlet valve assembly (19) is arranged on the outer side surface of the rear cover plate (2), the air inlet connecting piece (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 connecting piece (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 scroll (6), and the air inlet (6041) communicates with the compression chamber.

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