Bearing, compressor and refrigeration equipment

Abstract

The invention provides a bearing, a compressor and refrigeration equipment, the bearing is used for the compressor, the bearing comprises a shaft sleeve and a flange part, and the shaft sleeve is provided with a shaft hole penetrating in the axial direction of the bearing and used for installing a rotating shaft of the compressor; the flange part is connected with the shaft sleeve and arranged in the circumferential direction of the shaft sleeve, a platform is arranged on the first side of the flange part, the flange part is provided with a through hole, the through hole is formed in the platform, and the through hole extends to the second side of the flange part from the platform in the axial direction of the bearing so as to penetrate through the flange part. The platform is arranged on the bearing, so that a refrigerant and lubricating oil mixture can be gathered in the center area of the bearing, the refrigerant has more sufficient time for flash evaporation, the lubricating oil and the refrigerant mixture can be separated, the separated refrigerant moves upwards to be discharged out of the compressor, and the lubricating oil is accumulated to a certain height and overflows to the platform; the oil flows back to the oil pool through the through hole. The condition that a refrigerant returns to the oil pool along with lubricating oil is avoided, the amount of the refrigerant discharged by the compressor is guaranteed, and the working efficiency of the compressor is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of compressors, and more particularly, to a bearing, a compressor, and a refrigeration device. Background Art

[0002] Currently, in the related art, in order to improve the oil return effect of the compressor, oil return holes are provided on the bearing. When the compressor operates at a low temperature, after the refrigerant and lubricating oil inside the compressor are compressed by the pump body of the compressor, they will move towards the top of the bearing through the exhaust holes of the bearing. However, when the refrigerant-lubricating oil mixture that moves to the top of the bearing has not been fully separated, the refrigerant will follow the lubricating oil and return to the oil sump again, resulting in insufficient refrigerant discharged by the compressor and low working efficiency of the compressor. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

[0004] To this end, a first aspect of the present invention provides a bearing.

[0005] A second aspect of the present invention provides a compressor.

[0006] A third aspect of the present invention provides a refrigeration device.

[0007] In view of this, a first aspect of the present invention provides a bearing for a compressor. The bearing includes a bushing and a flange portion. The bushing is provided with a shaft hole that penetrates axially along the bearing for installing the rotating shaft of the compressor. The flange portion is connected to the bushing and arranged circumferentially along the bushing. A platform is provided on a first side of the flange portion. The flange portion is provided with a through hole. The through hole is provided on the platform and extends axially along the bearing from the platform to a second side of the flange portion to penetrate the flange portion.

[0008] The present invention provides a bearing applicable to a compressor, which includes a bushing and a flange portion. Among them, the bushing is provided with a shaft hole, and the rotating shaft of the compressor is limited by the shaft hole, so that the position of the rotating shaft rotating at high speed does not shift, improving the operating stability of the compressor. The flange portion is used for connecting and fixing with components such as the housing, bracket or shaft of the compressor, so that the bearing can be accurately installed at a predetermined position, ensuring the relative position accuracy between it and related components. A platform is provided on the flange portion, and through holes penetrating the flange portion are provided on the platform, and the through holes are used for the return of lubricating oil. When the compressor starts at low temperature, by providing a platform on the bearing, the refrigerant and lubricating oil mixture will gather in the central area of the bearing. Furthermore, the refrigerant has more sufficient time to flash vaporize, and the lubricating oil and refrigerant mixture can be separated. The separated refrigerant moves upward and is discharged from the compressor, and the lubricating oil accumulates to a certain height and then overflows onto the platform and returns to the oil sump through the through holes. By optimizing the structure and form of the bearing, the present invention avoids the situation where the refrigerant follows the lubricating oil back to the oil sump, ensures the amount of refrigerant discharged by the compressor, and thus improves the working efficiency of the compressor.

[0009] Meanwhile, by providing a platform, the present invention enables the full separation of the refrigerant and lubricating oil mixture. The lubricating oil returns to the oil sump through the through holes, increasing the height of the oil level in the oil sump, reducing the wear risk of the compressor, and enhancing the reliability of the product and the user experience.

[0010] If a platform is not provided on the bearing, the refrigerant and lubricating oil mixture does not have sufficient time to flash vaporize. As a result, the refrigerant will carry a large amount of lubricating oil and be discharged from the compressor, causing the oil level in the oil sump to drop. Even worse, there is a risk of the compressor running out of oil, increasing the degree of wear of the compressor and affecting the product reliability, user experience and company reputation.

[0011] Taking refrigerant deposition startup as an example, when the compressor stops outside at low temperature, the refrigerant gradually condenses into a liquid and accumulates in the compressor. When the compatibility between the refrigerant and the lubricating oil is good, the lubricating oil and the refrigerant are fully mixed. The lower the ambient temperature and the longer the deposition time, the more refrigerant dissolved in the lubricating oil. When starting the compressor at this time, the refrigerant in the lubricating oil is heated and flashes vaporize, carrying a large amount of lubricating oil and being discharged from the compressor, which is extremely likely to cause the compressor to run out of oil. By providing a platform on the bearing, the present invention enables the refrigerant to flash vaporize in the central area of the bearing. After the separation of the refrigerant and the lubricating oil, the lubricating oil returns to the oil sump through the through holes, avoiding the situation where the refrigerant follows the lubricating oil back to the oil sump, ensuring the amount of refrigerant discharged by the compressor, and improving the working efficiency of the compressor. At the same time, it also increases the height of the oil level in the oil sump, reduces the wear risk of the compressor, and enhances the reliability of the product and the user experience.

[0012] In addition, the bearing in the above technical solution provided by the present invention may further have the following additional technical features:

[0013] In some technical solutions of the present invention, optionally, the flange portion is provided with exhaust holes; in a radial section of the bearing, the through hole has a first center line extending along the radial direction of the bearing, and the exhaust hole has a second center line extending along the radial direction of the bearing, and the included angle between the first center line and the second center line is greater than or equal to 45 degrees.

[0014] In this technical solution, the flange portion is provided with exhaust holes, and the exhaust holes are used to discharge the refrigerant from the cylinder. Since the temperature in the exhaust hole area is high, a large amount of lubricating oil will be discharged from the compressor due to violent flashing in this area. In order to separate the lubricating oil and the refrigerant mixture more thoroughly, the through hole is arranged in an area far from the exhaust hole, so that the refrigerant undergoes slow flashing as much as possible, and then more lubricating oil returns to the oil sump, increasing the height of the oil level in the oil sump of the compressor.

[0015] Specifically, the through hole is arranged in an area far from the exhaust hole, and it is required that the included angle between the first center line extending along the radial direction of the bearing of the through hole and the second center line extending along the radial direction of the bearing of the exhaust hole is greater than or equal to 45 degrees.

[0016] Specifically, the included angle between the first center line and the second center line can be 45 degrees.

[0017] The included angle between the first center line and the second center line can be 60 degrees.

[0018] The included angle between the first center line and the second center line can be 90 degrees.

[0019] Exemplarily, when the included angle between the first center line and the second center line is less than 45 degrees, the relative height of the lowest oil level is less than 0.9; when the included angle between the first center line and the second center line is greater than or equal to 45 degrees, the relative height of the lowest oil level is greater than 0.9. It can be seen from this that when the included angle between the first center line and the second center line is greater than or equal to 45 degrees, the relative height of the lowest oil level is larger.

[0020] In some technical solutions of the present invention, optionally, the first side of the flange portion has a first surface, and the platform protrudes from the first surface.

[0021] In this technical solution, the platform protrudes from the first surface of the flange portion. This design can prevent the refrigerant and lubricating oil mixture from directly flowing back to the oil sump through the through hole. By setting the platform to protrude from the first surface, after the refrigerant and lubricating oil are separated, the lubricating oil returns to the oil sump through the through hole, improving the effect of lubricating oil return, ensuring the reliability of the product, and increasing the working efficiency of the compressor.

[0022] In some technical solutions of the present invention, optionally, in the axial direction of the bearing, the platform has a second surface, and the distance between the first surface and the second surface is greater than or equal to 3 mm and less than or equal to 6 mm.

[0023] In this technical solution, the upper surface of the platform is the second surface, and the platform protrudes from the first surface of the flange portion. The distance between the first surface and the second surface is greater than or equal to 3 mm and less than or equal to 6 mm. This design can make the refrigerant flash as much as possible in the bearing center flange portion area. After the refrigerant is separated from the lubricating oil, the refrigerant moves upward and is discharged from the compressor, and the lubricating oil flows back to the oil sump through the through holes on the platform, thereby increasing the height of the oil level in the oil sump when the compressor starts at low temperature.

[0024] If the distance between the first surface and the second surface is too small, the refrigerant and lubricating oil mixture is likely to directly enter the oil sump through the through holes of the platform, and the flashing in the bearing area is insufficient, so that the refrigerant carries the lubricating oil and is discharged from the compressor, resulting in a decrease in the oil level in the oil sump. If the distance between the first surface and the second surface is too large, a large amount of lubricating oil will be stored in the bearing area, so that the lubricating oil cannot return, resulting in a decrease in the height of the oil level in the oil sump.

[0025] Specifically, the distance between the first surface and the second surface can be 3 mm.

[0026] The distance between the first surface and the second surface can be 6 mm.

[0027] The distance between the first surface and the second surface can be 4.5 mm.

[0028] The distance between the first surface and the second surface can be 4 mm.

[0029] The distance between the first surface and the second surface can be 5 mm.

[0030] Exemplarily, when the distance between the first surface and the second surface is less than 3 mm, the relative steady-state oil level in the oil sump is below 0.8; when the distance between the first surface and the second surface is greater than or equal to 3 mm and less than or equal to 6 mm, the relative steady-state oil level in the oil sump is above 0.85 units; when the distance between the first surface and the second surface is greater than 6 mm, the relative steady-state oil level in the oil sump is below 0.85 units. It can be seen that when the distance between the first surface and the second surface is greater than or equal to 3 mm and less than or equal to 6 mm, the relative steady-state oil level in the oil sump is relatively high.

[0031] In some technical solutions of the present invention, optionally, the bearing further includes a blocking portion, there are a plurality of blocking portions, and the plurality of blocking portions are arranged at intervals along the circumferential direction of the flange portion; the platform is arranged between two adjacent blocking portions among the plurality of blocking portions.

[0032] In this technical solution, the bearing further includes a plurality of blocking portions, and a platform is provided between two adjacent blocking portions. When flashing occurs in the central region of the bearing, after the lubricating oil and the refrigerant mixture are separated, the refrigerant moves upward and is discharged from the compressor, and the lubricating oil is guided by the blocking portion to the through holes on the platform, improving the separation effect of the refrigerant and the lubricating oil, and at the same time improving the effect of the lubricating oil returning to the oil sump, thereby increasing the height of the oil level in the oil sump when the compressor starts at low temperature.

[0033] In some technical solutions of the present invention, optionally, the platform has a second surface; the blocking portion has a third surface; the distance between the third surface and the first surface is greater than the distance between the second surface and the first surface.

[0034] In this technical solution, by designing such that the distance between the third surface and the first surface is greater than the distance between the second surface and the first surface, the second surface is located between the first surface and the third surface. After separation, the lubricating oil is guided by the blocking portion to the through holes on the platform. If the distance between the first surface and the second surface is too small, the refrigerant and the lubricating oil mixture is likely to directly enter the oil sump through the through holes of the platform, resulting in insufficient flashing in the bearing area, and then the refrigerant carries the lubricating oil and is discharged from the compressor, causing the oil level in the oil sump to drop. If the distance between the first surface and the second surface is too large, a large amount of lubricating oil is stored in the bearing area, and then the lubricating oil cannot return to the oil sump, resulting in a decrease in the height of the oil level in the oil sump.

[0035] In some technical solutions of the present invention, optionally, the area of the radial cross-section of the through hole is a first area; the platform has a second surface, and the area of the second surface is a second area; the ratio of the first area to the second area is greater than or equal to 0.3 and less than or equal to 0.8.

[0036] In this technical solution, the first area is smaller than the second area, and the ratio of the first area to the second area is greater than or equal to 0.3 and less than or equal to 0.8. After the refrigerant flashes sufficiently, the lubricating oil flows back through the through holes, increasing the height of the oil level during low-temperature startup.

[0037] Specifically, when the area of the radial cross-section of the through hole is too small, the resistance to the return flow of the separated lubricating oil is large, reducing the ability to return oil to the oil sump and causing the oil level in the oil sump to drop; when the area of the radial cross-section of the through hole is too large, the refrigerant will directly enter the through hole and flow back without sufficient flashing, reducing the height of the oil level during low-temperature startup.

[0038] Specifically, the ratio of the first area to the second area can be 0.3.

[0039] The ratio of the first area to the second area can be 0.8.

[0040] The ratio of the first area to the second area can be 0.55.

[0041] The ratio of the first area to the second area can be 0.4.

[0042] The ratio of the first area to the second area can be 0.7.

[0043] Exemplarily, when the ratio of the first area to the second area is less than 0.3, the relative height of the steady-state oil surface in the oil sump is below 0.8; when the ratio of the first area to the second area is greater than or equal to 0.3 and less than or equal to 0.8, the relative height of the steady-state oil surface in the oil sump is above 0.8; when the ratio of the first area to the second area is greater than 0.8, the relative height of the steady-state oil surface in the oil sump is below 0.8. It can be seen from this that when the ratio of the first area to the second area is greater than or equal to 0.3 and less than or equal to 0.8, the relative height of the steady-state oil surface in the oil sump is relatively large.

[0044] In some technical solutions of the present invention, optionally, the through hole is a round hole, a square hole or a kidney-shaped hole.

[0045] In this technical solution, the through hole is a round hole, a square hole or a kidney-shaped hole, etc., which improves the flow rate of the lubricating oil, thereby increasing the height of the oil surface and improving the stability and working efficiency of the compressor.

[0046] The second aspect of the present invention provides a compressor, including a bearing as described in any one of the above technical solutions. Therefore, this type of compressor has all the beneficial effects of the bearing as described in any one of the above technical solutions.

[0047] In some technical solutions of the present invention, optionally, the compressor further includes a housing, a stator assembly, a rotor assembly, a pump assembly and a silencer. The stator assembly is arranged in the housing; the rotor assembly includes a rotor core and a rotating shaft. The rotor core is arranged in the stator assembly, and the rotating shaft passes through the rotor core; the pump assembly is sleeved on the rotating shaft, and a flange portion is arranged on one side of the pump assembly close to the rotor core; the silencer is arranged on one side of the flange portion close to the rotor core and is sleeved on the outside of the shaft sleeve.

[0048] In this technical solution, the compressor further includes a housing, a stator assembly, a rotor assembly, a pump assembly, and a silencer. Among them, the stator assembly and the rotor assembly are arranged inside the housing, providing power output for the operation of the compressor, and realizing functions such as compression and transportation of media such as refrigerant, thereby completing the working cycle of the compressor. The housing wraps the compressor components, making the overall structure of the compressor more solid and reducing the risk of damage to the compressor affected by external forces. The rotor assembly is composed of a rotor core and a rotating shaft. Through the design structure of the rotating shaft passing through the rotor core, the rotor core can drive the rotating shaft to rotate synchronously. At the same time, by sleeving the pump assembly on the rotating shaft, the rotation of the rotating shaft can drive the pump assembly to work, thereby realizing the function of compressing media such as refrigerant. The flange portion is provided on the pump assembly, making the position of the shaft sleeve connected to the flange portion fixed, thereby improving the stability of the rotation of the rotating shaft. The silencer is sleeved on the outside of the shaft sleeve, used to reduce the noise of the pump assembly and at the same time reduce the sound of the rotation of the rotating shaft, improving the reliability of the product and the user experience.

[0049] The third aspect of the present invention provides a refrigeration device, including a compressor as described in any one of the above technical solutions. Therefore, this refrigeration device has all the beneficial effects of the compressor as described in any one of the above technical solutions.

[0050] In some technical solutions of the present invention, optionally, the refrigeration device further includes a liquid receiver, a sealed housing, a piston, a lower bearing, a cylinder, and an exhaust port.

[0051] In this technical solution, the refrigeration device further includes a liquid receiver, a sealed housing, a piston, a lower bearing, a cylinder, and an exhaust port. Among them, the liquid receiver is used for oil separation and preventing the compressor from experiencing liquid slugging. The sealed housing cooperates with the housing to seal the inside of the compressor, preventing refrigerant leakage under high pressure. At the same time, the sealed housing and the housing can also make the overall structure of the compressor more solid, playing a protective role for the compressor. The upper end of the rotating shaft is fixed by the shaft sleeve, and the lower end is fixed by the lower bearing. This design enables the rotating shaft not to shift during high-speed rotation, improving the stability of the product operation. In the present invention, the rotating shaft drives the piston to reciprocate, compressing the refrigerant in the cylinder. After the refrigerant is compressed, it is discharged through the silencer into the air hood, and then enters the upper cavity of the motor through multiple through holes of the rotor core, realizing the working effect of the compressor.

[0052] Specifically, the refrigeration device includes a refrigerator, an air conditioner, a freezer, a wine cabinet, or a display cabinet, etc.

[0053] In some technical solutions of the present invention, optionally, when the refrigerant deposition starts, the oil level may be lower than the standard for several minutes. Since the temperature in the condenser is high, the discharged refrigerant cannot be quickly condensed, and the exhaust pressure rises relatively fast. The housing and the motor are in a cold state, the exhaust temperature rises slowly, and the exhaust superheat cannot be quickly established. Part of the liquid refrigerant deposits in the bearing and the oil sump. By optimizing the bearing structure, the present invention enables the refrigerant to flash slowly in the bearing area as much as possible, reduces the violent flashing in the bearing area from carrying a large amount of lubricating oil into the system, and thus increases the height of the oil level in the oil sump during low-temperature startup.

[0054] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0056] Figure 1 is an overall structure diagram of a compressor according to an embodiment of the present invention;

[0057] Figure 2 is a schematic diagram of a bearing according to an embodiment of the present invention;

[0058] Figure 3 is one of the cross-sectional views of a bearing according to an embodiment of the present invention;

[0059] Figure 4 is another cross-sectional view of a bearing according to an embodiment of the present invention;

[0060] Figure 5 is a schematic diagram of the relationship between the angle between the first center line and the second center line and the oil level height according to an embodiment of the present invention;

[0061] Figure 6 is a schematic diagram of the relationship between the angle between the third center line and the second center line and the oil level height according to an embodiment of the present invention;

[0062] Figure 7 is a schematic diagram of the relationship between the distance between the first surface and the second surface and the oil level height according to an embodiment of the present invention;

[0063] Figure 8 is a schematic diagram of the relationship between the ratio of the first area to the second area and the oil level height according to an embodiment of the present invention.

[0064] Wherein, Figures 1 to 8 the corresponding relationship between the reference numerals in

[0065] 100 Bearing, 110 Bush, 112 Bush Bore, 120 Flange Portion, 122 First Side of the Flange Portion, 124 Platform, 126 Through-Hole, 128 Second Side of the Flange Portion, 130 Exhaust Hole, 132 First Surface, 134 Second Surface, 140 Blocking Portion, 142 Third Surface, 200 Compressor, 210 Housing, 220 Stator Assembly, 230 Rotor Assembly, 232 Rotor Core, 234 Rotating Shaft, 240 Pump Assembly, 250 Silencer, 260 Liquid Reservoir, 270 Sealed Housing, 280 Piston, 290 Lower Bearing, 300 Cylinder, 310 Exhaust Port. Detailed Embodiments

[0066] In order to more clearly understand the above objects, features and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments may be combined with each other.

[0067] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited by the specific embodiments disclosed below.

[0068] The following refers to Figures 1 to 8 Describe the bearing 100, compressor 200 and refrigeration equipment according to some embodiments of the present invention.

[0069] In one embodiment of the present invention, as Figure 1 and Figure 2 shown, a bearing 100 is provided. The bearing 100 is used for the compressor 200. The bearing 100 includes a bush 110 and a flange portion 120. The bush 110 is provided with a bush bore 112 that penetrates axially along the bearing 100 for installing the rotating shaft 234 of the compressor 200. The flange portion 120 is connected to the bush 110 and is arranged circumferentially along the bush 110. A platform 124 is provided on the first side 122 of the flange portion 120. The flange portion 120 is provided with a through-hole 126. The through-hole 126 is provided on the platform 124, and the through-hole 126 extends axially along the bearing 100 from the platform 124 to the second side 128 of the flange portion 120 to penetrate the flange portion 120.

[0070] In this embodiment, the bearing 100 includes a bushing 110 and a flange portion 120. Among them, the bushing 110 is provided with a shaft hole 112, and the rotating shaft 234 of the compressor 200 is limited by the shaft hole 112, so that the position of the rotating shaft 234 rotating at high speed does not shift, improving the operating stability of the compressor 200. The flange portion 120 is used for connecting and fixing with components such as the housing, bracket or shaft of the compressor 200, so that the bearing 100 can be accurately installed at a predetermined position, ensuring the relative position accuracy between it and related components. A platform 124 is provided on the flange portion 120, and a through hole 126 penetrating the flange portion 120 is provided on the platform 124. When the compressor 200 starts at low temperature, by providing the platform 124, the refrigerant and lubricating oil mixture will gather in the central area of the bearing 100. Furthermore, the refrigerant has more sufficient time to flash vaporize, and can separate the lubricating oil and refrigerant mixture. The separated refrigerant moves upward and is discharged from the compressor 200, and the lubricating oil will overflow to the platform 124 when it accumulates to a certain height and then flows back to the oil sump through the through hole 126. By optimizing the structure and form of the bearing 100, the present invention avoids the situation that the refrigerant follows the lubricating oil and returns to the oil sump again, ensures the amount of refrigerant discharged by the compressor 200, and thus improves the working efficiency of the compressor 200.

[0071] At the same time, by providing the platform 124, the present invention enables the refrigerant and lubricating oil mixture to be fully separated, and the lubricating oil returns to the oil sump through the through hole 126, increasing the height of the oil level in the oil sump, reducing the wear risk of the compressor 200, and enhancing the reliability of the product and the user experience.

[0072] If the platform 124 is not provided on the bearing 100, the refrigerant and lubricating oil mixture does not have sufficient time to flash vaporize. As a result, the refrigerant will carry a large amount of lubricating oil and be discharged from the compressor 200, causing the oil level in the oil sump to drop. Even worse, there is a risk of the compressor 200 running out of oil, increasing the degree of wear of the compressor 200 and affecting the product reliability, user experience and company reputation.

[0073] Taking the refrigerant deposition startup as an example, when the compressor 200 stops operating on the low-temperature outdoor side, the refrigerant gradually condenses into a liquid and accumulates inside the compressor 200. When the compatibility between the refrigerant and the lubricating oil is good, the lubricating oil and the refrigerant are fully mixed. The lower the ambient temperature, the longer the deposition time, and the more refrigerant dissolved in the lubricating oil. When the compressor 200 is started at this time, the refrigerant in the lubricating oil undergoes flash evaporation due to heat, carrying a large amount of lubricating oil and discharging from the compressor 200, which is extremely likely to cause the compressor 200 to run out of oil. By providing the platform 124 in the present invention, the refrigerant undergoes flash evaporation in the central region of the bearing 100. After the separation of the refrigerant and the lubricating oil, the lubricating oil returns to the oil sump through the through hole 126, avoiding the situation where the refrigerant follows the lubricating oil back to the oil sump, ensuring the amount of refrigerant discharged from the compressor 200, improving the working efficiency of the compressor 200. At the same time, it also increases the height of the oil level in the oil sump, reduces the wear risk of the compressor 200, and enhances the reliability of the product and the user experience.

[0074] Specifically, the axial direction in the present invention is Figure 1 the direction indicated by arrow A in

[0075] The radial direction in the present invention is Figure 1 the direction indicated by arrow B in

[0076] The circumferential direction in the present invention is Figure 2 the direction indicated by arrow C in

[0077] The first area in the present invention is Figure 2 the area indicated by S1 in

[0078] The second area in the present invention is Figure 2 the area indicated by S2 in

[0079] The first center line in the present invention is Figure 2 the dotted line indicated by Z1 in

[0080] The second center line in the present invention is Figure 2 the dotted line indicated by Z2 in

[0081] The third center line in the present invention is Figure 2 the dotted line indicated by Z3 in

[0082] The distance between the first surface 132 and the second surface 134 in the present invention is Figure 3 and Figure 4 the distance indicated by H1 in

[0083] The distance between the first surface 132 and the third surface 142 in the present invention is Figure 4 the distance indicated by H2 in

[0084] This embodiment provides a bearing 100. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features.

[0085] As Figure 2 shown, the flange portion 120 is provided with an exhaust hole 130; in a radial cross-section of the bearing 100, the through hole 126 has a first center line extending along the radial direction of the bearing 100, and the exhaust hole 130 has a second center line extending along the radial direction of the bearing 100, and the included angle between the first center line and the second center line is greater than or equal to 45 degrees.

[0086] In this embodiment, the flange portion 120 is provided with an exhaust hole 130, and the exhaust hole 130 is used to discharge the refrigerant from the cylinder 300. Since the temperature in the area of the exhaust hole 130 is high, a large amount of lubricating oil will be discharged from the compressor 200 due to intense flashing in this area. In order to separate the lubricating oil and the refrigerant mixture more thoroughly, the through hole 126 is arranged in an area far from the exhaust hole 130, so that the refrigerant undergoes slow flashing as much as possible, and then more lubricating oil returns to the oil sump, increasing the height of the oil level in the oil sump of the compressor 200.

[0087] Specifically, the through hole 126 is arranged in an area far from the exhaust hole 130, and it is required that the included angle between the first center line extending along the radial direction of the bearing 100 of the through hole 126 and the second center line extending along the radial direction of the bearing 100 of the exhaust hole 130 is greater than or equal to 45 degrees.

[0088] Specifically, the included angle between the first center line and the second center line can be 45 degrees.

[0089] The included angle between the first center line and the second center line can be 60 degrees.

[0090] The included angle between the first center line and the second center line can be 90 degrees.

[0091] Exemplarily, as Figure 5 and Figure 6 shown, when the included angle between the first center line and the second center line is less than 45 degrees, the relative height of the lowest oil level is less than 0.9; when the included angle between the first center line and the second center line is greater than or equal to 45 degrees, the relative height of the lowest oil level is greater than 0.9. It can be seen that when the included angle θ1 between the first center line and the second center line is greater than or equal to 45 degrees, the relative height of the lowest oil level is larger. When the included angle θ2 between the third center line and the second center line is also greater than or equal to 45 degrees, the relative height of the lowest oil level is larger.

[0092] This embodiment provides a bearing 100. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features.

[0093] As Figure 3As shown, the first side 122 of the flange portion 120 has a first surface 132, and the platform 124 protrudes from the first surface 132.

[0094] In this embodiment, the platform 124 protrudes from the first surface 132 of the flange portion 120. This design can prevent the refrigerant and lubricating oil mixture from directly flowing back to the oil sump through the through hole 126. By setting the platform 124 to protrude from the first surface 132, after the refrigerant and the lubricating oil are separated, the lubricating oil returns to the oil sump through the through hole 126, improving the effect of the lubricating oil returning, ensuring the reliability of the product, and improving the working efficiency of the compressor 200.

[0095] This embodiment provides a bearing 100. In addition to the technical features of the above embodiment, this embodiment further includes the following technical features.

[0096] As Figure 3 shown, in the axial direction of the bearing 100, the platform 124 has a second surface 134, and the distance between the first surface 132 and the second surface 134 is greater than or equal to 3 millimeters and less than or equal to 6 millimeters.

[0097] In this embodiment, the upper surface of the platform 124 is the second surface 134. The platform 124 protrudes from the first surface 132 of the flange portion 120, and the distance between the first surface 132 and the second surface 134 is greater than or equal to 3 millimeters and less than or equal to 6 millimeters. This design can cause the refrigerant to flash as much as possible in the central flange portion 120 area of the bearing 100. After the refrigerant and the lubricating oil are separated, the refrigerant moves upward and is discharged from the compressor 200, and the lubricating oil returns to the oil sump through the through hole 126 on the platform 124, thereby increasing the height of the oil level in the oil sump when the compressor 200 starts at low temperature.

[0098] If the distance between the first surface 132 and the second surface 134 is too small, the refrigerant and lubricating oil mixture is likely to directly enter the oil sump through the through hole 126 of the platform 124, and the flashing in the bearing 100 area is insufficient, and then the refrigerant carries the lubricating oil and is discharged from the compressor 200, resulting in a decrease in the oil level in the oil sump. If the distance between the first surface 132 and the second surface 134 is too large, a large amount of lubricating oil will be stored in the bearing 100 area, and then the lubricating oil cannot return to the oil sump, resulting in a decrease in the height of the oil level in the oil sump.

[0099] Specifically, the distance between the first surface 132 and the second surface 134 can be 3 millimeters.

[0100] The distance between the first surface 132 and the second surface 134 can be 6 millimeters.

[0101] The distance between the first surface 132 and the second surface 134 can be 4.5 millimeters.

[0102] The distance between the first surface 132 and the second surface 134 can be 4 millimeters.

[0103] The distance between the first surface 132 and the second surface 134 can be 5 millimeters.

[0104] Exemplarily, as Figure 7 shown, when the distance between the first surface 132 and the second surface 134 is less than 3 millimeters, the relative height of the steady-state oil level in the oil sump is below 0.8; when the distance between the first surface 132 and the second surface 134 is greater than or equal to 3 millimeters and less than or equal to 6 millimeters, the relative height of the steady-state oil level in the oil sump is above 0.85 units; when the distance between the first surface 132 and the second surface 134 is greater than 6 millimeters, the relative height of the steady-state oil level in the oil sump is below 0.85 units. It can be seen from this that when the distance between the first surface 132 and the second surface 134 is greater than or equal to 3 millimeters and less than or equal to 6 millimeters, the relative height of the steady-state oil level in the oil sump is relatively large.

[0105] This embodiment provides a bearing 100. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features.

[0106] As Figure 4 shown, the bearing 100 further includes a plurality of blocking portions 140. The plurality of blocking portions 140 are arranged at intervals along the circumferential direction of the flange portion 120; a platform 124 is disposed between two adjacent blocking portions 140 among the plurality of blocking portions 140.

[0107] In this embodiment, the bearing 100 further includes a plurality of blocking portions 140, and a platform 124 is disposed between two adjacent blocking portions 140. When flashing occurs in the central region of the bearing 100, after the lubricating oil and the refrigerant mixture are separated, the refrigerant moves upward and is discharged from the compressor 200, and the lubricating oil is guided by the blocking portion 140 to the through hole 126 on the platform 124, improving the separation effect of the refrigerant and the lubricating oil, and at the same time improving the effect of the lubricating oil returning to the oil sump, thereby increasing the height of the oil level in the oil sump when the compressor 200 starts at low temperature.

[0108] This embodiment provides a bearing 100. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features.

[0109] As Figure 3 and Figure 4 shown, the platform 124 has a second surface 134; the blocking portion 140 has a third surface 142; the distance between the third surface 142 and the first surface 132 is greater than the distance between the second surface 134 and the first surface 132.

[0110] In this embodiment, by designing the distance between the third surface 142 and the first surface 132 to be greater than the distance between the second surface 134 and the first surface 132, the second surface 134 is located between the first surface 132 and the third surface 142. After separation, the lubricating oil is diverted by the blocking portion 140 to the through hole 126 on the platform 124. If the distance between the first surface 132 and the second surface 134 is too small, the refrigerant and lubricating oil mixture is likely to directly enter the oil sump through the through hole 126 of the platform 124, resulting in insufficient flashing in the bearing 100 area. Furthermore, the refrigerant carries the lubricating oil out of the compressor 200, causing the oil level in the oil sump to drop. If the distance between the first surface 132 and the second surface 134 is too large, a large amount of lubricating oil is stored in the bearing 100 area, making it impossible for the lubricating oil to return, resulting in a decrease in the oil level height in the oil sump.

[0111] This embodiment provides a bearing 100, which further includes the following technical features in addition to the technical features of the above embodiment.

[0112] As Figure 2 shown, the area of the radial cross-section of the through hole 126 is the first area; the platform 124 has a second surface 134, and the area of the second surface 134 is the second area; the ratio of the first area to the second area is greater than or equal to 0.3 and less than or equal to 0.8.

[0113] In this embodiment, the first area is smaller than the second area, and the ratio of the first area to the second area is greater than or equal to 0.3 and less than or equal to 0.8. After the refrigerant fully flashes, the lubricating oil flows back through the through hole 126, raising the oil level during low-temperature startup.

[0114] Specifically, when the area of the radial cross-section of the through hole 126 is too small, the resistance to the return flow of the separated lubricating oil is large, reducing the ability to return oil to the oil sump and causing the oil level in the oil sump to drop; when the area of the radial cross-section of the through hole 126 is too large, the refrigerant will directly enter the through hole 126 for return flow without sufficient flashing, reducing the oil level during low-temperature startup.

[0115] Specifically, the ratio of the first area to the second area can be 0.3.

[0116] The ratio of the first area to the second area can be 0.8.

[0117] The ratio of the first area to the second area can be 0.55.

[0118] The ratio of the first area to the second area can be 0.4.

[0119] The ratio of the first area to the second area can be 0.7.

[0120] Exemplarily, as Figure 8As shown, when the ratio of the first area to the second area is less than 0.3, the relative height of the steady-state oil level in the oil sump is below 0.8; when the ratio of the first area to the second area is greater than or equal to 0.3 and less than or equal to 0.8, the relative height of the steady-state oil level in the oil sump is above 0.8; when the ratio of the first area to the second area is greater than 0.8, the relative height of the steady-state oil level in the oil sump is below 0.8. It can be seen from this that when the ratio of the first area to the second area is greater than or equal to 0.3 and less than or equal to 0.8, the relative height of the steady-state oil level in the oil sump is larger.

[0121] This embodiment provides a bearing 100. In addition to the technical features of the above embodiment, this embodiment further includes the following technical features.

[0122] The through hole 126 is a round hole, a square hole or an oval hole.

[0123] In this embodiment, the through hole 126 is a round hole, a square hole, an oval hole, etc., which improves the flow rate of the lubricating oil, thereby increasing the oil level height and improving the stability and working efficiency of the compressor 200.

[0124] The second aspect of the present invention provides a compressor 200, including the bearing 100 according to any one of the above embodiments. Therefore, this compressor 200 has all the beneficial effects of the bearing 100 according to any one of the above embodiments.

[0125] This embodiment provides a compressor 200. In addition to the technical features of the above embodiment, this embodiment further includes the following technical features.

[0126] As Figure 1 shown, the compressor 200 further includes a housing 210, a stator assembly 220, a rotor assembly 230, a pump assembly 240 and a muffler 250. The stator assembly 220 is disposed inside the housing 210; the rotor assembly 230 includes a rotor core 232 and a rotating shaft 234. The rotor core 232 is disposed inside the stator assembly 220, and the rotating shaft 234 passes through the rotor core 232; the pump assembly 240 is sleeved on the rotating shaft 234, and the flange portion 120 is disposed on the side of the pump assembly 240 close to the rotor core 232; the muffler 250 is disposed on the side of the flange portion 120 close to the rotor core 232 and is sleeved outside the shaft sleeve 110.

[0127] In this embodiment, the compressor 200 further includes a housing 210, a stator assembly 220, a rotor assembly 230, a pump assembly 240, and a silencer 250. Among them, the stator assembly 220 and the rotor assembly 230 are arranged inside the housing 210, providing power output for the operation of the compressor 200, and realizing functions such as compression and transportation of media such as refrigerant, thereby completing the working cycle of the compressor 200. The housing 210 wraps the components of the compressor 200, making the overall structure of the compressor 200 more solid and reducing the risk of damage to the compressor 200 due to external forces. The rotor assembly 230 is composed of a rotor core 232 and a rotating shaft 234. Through the design structure in which the rotating shaft 234 penetrates the rotor core 232, the rotor core 232 can drive the rotating shaft 234 to rotate synchronously. At the same time, by sleeving the pump assembly 240 on the rotating shaft 234, the rotation of the rotating shaft 234 can drive the pump assembly 240 to work, thereby realizing the function of compressing media such as refrigerant. The flange portion 120 is provided on the pump assembly 240, making the position of the bushing 110 connected to the flange portion 120 fixed, thereby improving the rotation stability of the rotating shaft 234. The silencer 250 is sleeved outside the bushing 110, used to reduce the noise of the pump assembly 240 and at the same time reduce the sound of the rotation of the rotating shaft 234, improving the reliability of the product and the user experience.

[0128] The third aspect of the present invention provides a refrigeration device, including the compressor 200 as described in any one of the above embodiments. Therefore, this refrigeration device has all the beneficial effects of the compressor 200 as described in any one of the above embodiments.

[0129] This embodiment provides a refrigeration device. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features.

[0130] As Figure 1 shown, the refrigeration device further includes a liquid receiver 260, a sealed housing 270, a piston 280, a lower bearing 290, a cylinder 300, and an exhaust port 310.

[0131] In this embodiment, the refrigeration device further includes a liquid receiver 260, a sealed housing 270, a piston 280, a lower bearing 290, a cylinder 300, and an exhaust port 310. Among them, the liquid receiver 260 is used for separating lubricating oil and preventing liquid slugging in the compressor 200. The sealed housing 270 cooperates with the housing 210 to seal the interior of the compressor 200 and prevent refrigerant leakage under high pressure. At the same time, the sealed housing 270 and the housing 210 can also make the overall structure of the compressor 200 stronger and play a protective role for the compressor 200. The upper end of the rotating shaft 234 is fixed by the bushing 110, and the lower end is fixed by the lower bearing 290. This design enables the rotating shaft 234 not to shift during high-speed rotation, improving the operating stability of the product. In the present invention, the piston 280 is driven by the rotating shaft 234 to reciprocate, compressing the refrigerant in the cylinder 300. After the refrigerant is compressed, it is discharged through the muffler 250 into the air hood, and then enters the upper cavity of the motor through the multiple through holes 126 of the rotor core, achieving the working effect of the compressor 200.

[0132] Specifically, the refrigeration device includes a refrigerator, an air conditioner, a freezer, a wine cabinet, or a display cabinet, etc.

[0133] When the refrigerant deposition starts, the oil level will be lower than the standard for several minutes. Since the temperature in the condenser is high, the discharged refrigerant cannot be quickly condensed, and the exhaust pressure rises relatively fast. The housing 210 and the motor are in a cold state, the exhaust temperature rises slowly, and the exhaust superheat cannot be quickly established. Part of the liquid refrigerant deposits in the bearing 100 and the oil sump. By optimizing the structure of the bearing 100 in the present invention, the liquid refrigerant is made to flash slowly in the bearing 100 area as much as possible, reducing the violent flashing in the bearing 100 area from carrying a large amount of lubricating oil into the system, thereby increasing the height of the oil level in the oil sump during low-temperature startup.

[0134] In the claims, the description, and the drawings of the present invention, the term "a plurality of" means two or more, unless otherwise explicitly defined. The orientation or positional relationship indicated by terms such as "upper" and "lower" is based on the orientation or positional relationship shown in the drawings, and is only for more convenient description of the present invention and to make the description process simpler, rather than to indicate or imply that the device or element referred to must have the specific orientation, be constructed and operated in the specific orientation. Therefore, these descriptions should not be construed as limitations on the present invention; terms such as "connected", "installed", and "fixed" should all be understood in a broad sense. For example, "connected" can be a fixed connection between multiple objects, a detachable connection between multiple objects, or an integral connection; it can be a direct connection between multiple objects, or an indirect connection between multiple objects through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances of the above data.

[0135] In the claims, specification and drawings of the present invention, the descriptions of terms such as "one embodiment", "some embodiments", "specific embodiments", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In the claims, specification and drawings of the present invention, the schematic representations of the above terms do not necessarily refer to the same embodiment or instance. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0136] The foregoing are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A bearing, characterized in that: The bearing is used for a compressor, and the bearing comprises: A shaft sleeve, wherein the shaft sleeve is provided with an axial hole penetrating along the axial direction of the bearing and is used for mounting the rotating shaft of the compressor; A flange portion, the flange portion is connected to the sleeve and is arranged along the circumference of the sleeve, a platform is provided on the first side of the flange portion, the flange portion is provided with a through hole, the through hole is provided on the platform, and the through hole extends from the platform to the second side of the flange portion along the axial direction of the bearing to penetrate the flange portion.

2. The bearing according to claim 1, characterized in that: The flange portion is provided with an exhaust hole; On a radial cross section of the bearing, the through hole has a first center line extending radially along the bearing, the exhaust hole has a second center line extending radially along the bearing, and an angle between the first center line and the second center line is greater than or equal to 45 degrees.

3. The bearing according to claim 1, characterized in that: The first side of the flange portion has a first surface, and the platform protrudes from the first surface.

4. The bearing according to claim 3, characterized in that: In the axial direction of the bearing, the platform has a second surface, and a distance between the first surface and the second surface is greater than or equal to 3 mm and less than or equal to 6 mm.

5. The bearing according to claim 3, characterized in that: Also includes: A blocking portion, wherein the blocking portion is multiple and the multiple blocking portions are arranged at intervals along the circumference of the flange portion; The platform is arranged between two adjacent blocking parts among the plurality of blocking parts.

6. The bearing according to claim 5, characterized in that: The platform has a second surface; The blocking portion has a third surface; A distance between the third surface and the first surface is greater than a distance between the second surface and the first surface.

7. The bearing according to claim 1, characterized in that The area of ​​the radial cross section of the through hole is a first area; The platform has a second surface, and the area of ​​the second surface is a second area; A ratio of the first area to the second area is greater than or equal to 0.3 and less than or equal to 0.

8.

8. The bearing according to any one of claims 1 to 7, characterized in that The through hole is a round hole, a square hole or a waist-shaped hole.

9. A compressor, characterized in that: Comprising the bearing according to any one of claims 1 to 8.

10. The compressor according to claim 9, characterized in that Also includes: case; A stator assembly, wherein the stator assembly is disposed in the housing; A rotor assembly, the rotor assembly comprising a rotor core and the rotating shaft, the rotor core is arranged in the stator assembly, and the rotating shaft passes through the rotor core; A pump assembly, wherein the pump assembly is sleeved on the rotating shaft, and the flange portion is arranged on a side of the pump assembly close to the rotor core; The muffler is arranged on a side of the flange portion close to the rotor core and is sleeved on the outer side of the shaft sleeve.

11. A refrigeration device, characterized in that: Comprising a compressor as claimed in claim 9 or 10.

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