Compressor and refrigeration equipment

Abstract

The utility model discloses a compressor and refrigeration equipment, and relates to the technical field of compressors. The compressor comprises a shell, a motor assembly, a pump body assembly, a crankshaft and a bearing assembly, the motor assembly is installed in the shell, and the motor assembly drives the crankshaft to rotate relative to the pump body assembly so as to compress a refrigerant in the pump body assembly. The rotor is provided with an air channel, and the guide plate is used for guiding airflow flowing through the air channel to the part, protruding out of the upper end face of the stator iron core, of the winding. The winding has the function of a filter screen and can filter lubricating oil particles mixed in a refrigerant, so that the oil spitting amount of the compressor is reduced, and the service life of the compressor is prolonged. Due to the fact that the flow guide plate is fixed relative to the shell, and the gas passing channel can synchronously rotate along with the rotor, the relative speed of the refrigerant discharged from the gas passing channel and the flow guide plate is large, the refrigerant can be conveniently thrown out to the winding, and the oil-gas separation efficiency is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of compressors, in particular to a compressor and a refrigeration device. Background Art

[0002] The rotary compressor includes a housing, a crankshaft, a motor assembly, a pump body and other structures. The motor assembly is connected to the crankshaft in a driving manner, and the crankshaft is inserted into the pump body. Through the rotation of the crankshaft, the piston of the eccentric part of the crankshaft moves eccentrically in the pump body to compress the refrigerant. The compressed refrigerant is discharged into the interior of the housing. The compressed refrigerant passes through the motor assembly and is discharged from the compressor through the exhaust pipe. Since an oil pool is provided at the bottom of the housing, the refrigerant is likely to carry away some of the lubricating oil and be discharged from the exhaust pipe when it flows upward, resulting in an increase in the oil discharge of the compressor and insufficient lubricating oil in the oil pool, which intensifies the wear of the compressor and reduces its life. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a compressor that can reduce the oil discharge amount, improve the lubrication effect inside the compressor, and increase the service life.

[0004] The utility model also provides a refrigeration device having the compressor.

[0005] According to the first embodiment of the utility model, the compressor comprises: a shell, a bottom of which is formed with an oil pool for storing lubricating oil; a motor assembly, which is arranged inside the shell and above the oil pool, and the motor assembly comprises a winding, a stator core and a rotor, the stator core is arranged around the circumference of the shell, the winding is wound around the stator core and protrudes from the upper end surface of the stator core, the rotor is arranged on the inner side of the stator core, and the rotor is provided with a through-gas passage; a pump body assembly, which is arranged inside the shell and below the motor assembly A crankshaft is fixedly connected to the rotor and can rotate under the drive of the motor assembly and is arranged in the pump body assembly; a bearing assembly is fixedly connected to the inside of the shell and is located above the motor assembly, the bearing assembly includes a sleeve and a guide plate connected to the outside of the sleeve, the sleeve is sleeved on the crankshaft so that the crankshaft can rotate relative to the sleeve, the guide plate is located in the enclosed space of the winding, and the guide plate is used to guide the airflow flowing through the air passage to the portion of the winding protruding from the upper end surface of the stator core.

[0006] The compressor according to the embodiment of the utility model has at least the following beneficial effects:

[0007] By installing the motor assembly inside the housing, the motor assembly drives the crankshaft to rotate relative to the pump body assembly to compress the refrigerant in the pump body assembly. The pump body assembly discharges the compressed refrigerant into the housing and flows upward. After the refrigerant passes through the motor assembly, the motor assembly can be cooled. The winding of the motor assembly is wound around the stator core and protrudes from the upper end surface of the stator core. The sleeve of the bearing assembly is sleeved on the upper end of the crankshaft to improve the stability of the crankshaft operation. The guide plate is connected to the outer wall of the sleeve and is located in the space surrounded by the winding. The rotor is provided with a through-air passage. The guide plate is used to guide the airflow flowing through the air passage to the part of the winding protruding from the upper end surface of the stator core. The airflow includes refrigerant and lubricating oil particles. The winding has the function of a filter, which can filter the lubricating oil particles mixed in the refrigerant, and the refrigerant continues to flow to the upper side of the housing. The filtered lubricating oil can flow back to the oil pool to reduce the oil discharge of the compressor and improve the service life of the compressor. Since the guide plate is fixed relative to the shell and the air passage rotates synchronously with the rotor, the relative speed of the refrigerant discharged from the air passage and the guide plate is relatively large, which makes it easier to throw the refrigerant into the winding and further improve the oil-gas separation efficiency.

[0008] According to some embodiments of the present invention, on a projection plane perpendicular to the rotation axis of the motor assembly, a projection of the air outlet of the air passage is located within a projection of an outer contour line of the guide plate.

[0009] According to some embodiments of the utility model, along the radial direction of the motor assembly, the farthest distance between the air outlet of the air passage and the rotation axis of the motor assembly is R1, the farthest distance between the outer edge of the guide plate and the rotation axis is R2, and the farthest distance between the outer edge of the rotor and the rotation axis is R3, satisfying: R1≤R2≤1.2*R3.

[0010] According to some embodiments of the present utility model, the lower end surface of the guide plate is an inclined surface, and the inclined surface is inclined downward in a direction toward the winding.

[0011] According to some embodiments of the present invention, the angle A between the inclined surface and the rotation axis of the motor assembly satisfies: 45°≤A<90°.

[0012] According to some embodiments of the present invention, along the axial direction of the motor assembly, the thickness of the guide plate is h, which satisfies: 0.8 mm ≤ h ≤ 1.2 mm.

[0013] According to some embodiments of the utility model, the guide plate is provided with a through hole, the edge of the through hole is provided with a first flange extending along the axial direction of the motor assembly, and the first flange is sleeved on the outer side of the sleeve through the through hole.

[0014] According to some embodiments of the utility model, the upper end of the sleeve is provided with a second flange extending radially along the motor assembly, the bearing assembly also includes a positioning sleeve and a fastener, the guide plate is provided with a mounting hole, the fastener is passed through the second flange and the guide plate, the positioning sleeve is sleeved on the fastener and located between the second flange and the guide plate, and the two ends of the positioning sleeve abut against the second flange and the guide plate.

[0015] According to some embodiments of the present invention, the maximum distance between the lower end surface of the guide plate and the upper end surface of the winding is H1, and the maximum height between the upper end surface of the winding and the stator core is H2, satisfying: 0≤H1≤0.4*H2.

[0016] According to some embodiments of the utility model, the minimum distance between the lower end surface of the guide plate and the upper end surface of the rotor is H3, the displacement of the compressor is Q, the motor assembly is provided with a channel group for conveying refrigerant, and the flow area of ​​the air outlet of the channel group is S, satisfying: 3Q / S≤H3≤6Q / S.

[0017] The refrigeration device according to the embodiment of the second aspect of the utility model comprises the compressor described in the above embodiment.

[0018] The refrigeration device according to the embodiment of the utility model has at least the following beneficial effects:

[0019] By adopting the compressor of the first aspect embodiment, the compressor installs the motor assembly inside the housing, and the motor assembly drives the crankshaft to rotate relative to the pump body assembly to compress the refrigerant in the pump body assembly. The pump body assembly discharges the compressed refrigerant into the housing and flows upward. After the refrigerant passes through the motor assembly, the motor assembly can be cooled. The winding of the motor assembly is wound around the stator core and protrudes from the upper end surface of the stator core. The shaft sleeve of the bearing assembly is sleeved on the upper end of the crankshaft to improve the stability of the crankshaft operation. The guide plate is connected to the outer wall of the sleeve and is located in the space surrounded by the winding. The rotor is provided with a through-gas passage. The guide plate is used to guide the airflow flowing through the air passage to the part of the winding protruding from the upper end surface of the stator core. The airflow includes refrigerant and lubricating oil particles. The winding has the function of a filter, which can filter the lubricating oil particles mixed in the refrigerant, and the refrigerant continues to flow to the upper side of the housing. The filtered lubricating oil can flow back to the oil pool to reduce the oil discharge of the compressor and improve the service life of the compressor. Since the guide plate is fixed relative to the shell and the air passage rotates synchronously with the rotor, the relative speed of the refrigerant discharged from the air passage and the guide plate is relatively large, which makes it easier to throw the refrigerant into the winding and further improve the oil-gas separation efficiency.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention is further described below with reference to the accompanying drawings and embodiments, wherein:

[0022] Figure 1 is a cross-sectional view of a compressor of an embodiment of the utility model;

[0023] Figure 2 is a cross-sectional view of a bearing assembly according to an embodiment of the utility model;

[0024] Figure 3 It is a cross-sectional view of a guide plate of an embodiment of the utility model;

[0025] Figure 4 is a top view of a guide plate of another embodiment of the utility model;

[0026] Figure 5 It is a structural schematic diagram of a connection method between a guide plate and a shaft sleeve in another embodiment of the utility model;

[0027] Figure 6 is a cross-sectional view of a guide plate of another embodiment of the utility model;

[0028] Figure 7 It is a top view of a rotor of an embodiment of the utility model;

[0029] Figure 8 yes Figure 1 Enlarged view of point A in the middle.

[0030] Reference numerals:

[0031] Compressor 1000;

[0032] Shell 100; exhaust pipe 110; first cavity 120; second cavity 130; oil pool 140; first oil return channel 150;

[0033] Motor assembly 200; winding 210; stator core 220; rotor 230; air passage 231; second oil return passage 240; first balancing block 250; second balancing block 260;

[0034] Pump body assembly 300; crankshaft 310; first eccentric portion 311; second eccentric portion 312; first compression chamber 320; second compression chamber 330;

[0035] Bearing assembly 400 ; sleeve 410 ; second flange 411 ; guide plate 420 ; through hole 421 ; first flange 422 ; mounting hole 423 ; inclined surface 424 ; exhaust cavity 430 ; opening 431 ; positioning sleeve 440 ; fastener 450 . DETAILED DESCRIPTION

[0036] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0037] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0038] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0039] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0040] There is an oil pool at the bottom of the compressor, which is used to store lubricating oil. The lubricating oil participates in the refrigerant circulation inside the compressor, which plays a role in delaying wear and improving the smoothness of the rotation of the pump body components. In order to ensure the lubrication effect, the oil discharge of the compressor should not be too high. The compressor may increase the oil discharge due to reasons such as high temperature, different types of lubricating oil, and usage time. For example, in a two-stage compressor, compared with a single-stage compressor, more lubricating oil is in contact with the refrigerant in the compression chamber, thereby increasing the probability that the lubricating oil is taken out of the compressor with the refrigerant. At the same time, the refrigerant pressure and temperature of the two-stage compressor are higher, and the lubricating oil is more likely to volatilize, so the oil discharge of the two-stage compressor is higher. High oil discharge will lead to insufficient lubricating oil inside the compressor, increase friction and wear, and reduce the service life of the compressor.

[0041] In the related art, the oil discharge of the compressor can be reduced by setting an oil-gas separation structure. However, for compressors with larger displacement, the crankshaft is longer. In order to improve the stability of the crankshaft during rotation, it is necessary to add a bearing assembly to the upper end of the crankshaft to reduce the shaking of the crankshaft during operation. The oil-gas separation structure and the bearing assembly are both arranged at the upper end of the crankshaft, which is prone to interference. In order to maintain a safe distance, a large gap is left between the oil-gas separation structure and the bearing assembly, which easily causes the refrigerant with lubricating oil to escape directly, and the oil-gas separation structure is difficult to play a role in reducing the oil discharge.

[0042] To improve the above problems, refer to Figure 1 and Figure 2 As shown, a compressor 1000 of an embodiment of the utility model can be used in refrigeration equipment, such as air conditioners, refrigerators, etc. The compressor 1000 of the utility model embodiment includes a housing 100, a motor assembly 200, a pump body assembly 300, a crankshaft 310 and a bearing assembly 400. An oil pool 140 is formed at the bottom of the housing 100, and the oil pool 140 is used to store lubricating oil. The motor assembly 200 is arranged inside the housing 100 and above the oil pool 140. The motor assembly 200 includes a winding 210, a stator core 220 and a rotor 230. The stator core 220 is arranged circumferentially around the housing 100, and the winding 210 is wound around the stator core 220 and protrudes from the upper end surface of the stator core 220. The rotor 230 is arranged on the inner side of the stator core 220 and can rotate relative to the stator core 220. A first cavity 120 is formed between the upper end of the rotor 230 and the inner wall of the housing 100, a second cavity 130 is formed between the lower end of the rotor 230 and the inner wall of the housing 100, and the housing 100 is further provided with an exhaust pipe 110, the inner cavity of the exhaust pipe 110 is connected to the first cavity 120. The rotor 230 is provided with an air passage 231, the two ends of which are connected to the first cavity 120 and the second cavity 130, that is, the air passage 231 runs through the upper and lower ends of the rotor 230.

[0043] Continue to refer to Figure 1As shown, the pump assembly 300 is arranged inside the housing 100 and below the motor assembly 200. The crankshaft 310 and the rotor 230 are fixedly connected and can be rotated in the pump assembly 300 under the drive of the motor assembly 200. For example, the crankshaft 310 is provided with a first eccentric portion 311 and a second eccentric portion 312, and the compression assembly is provided with a first compression chamber 320 and a second compression chamber 330, the first eccentric portion 311 is located in the first compression chamber 320, and the second eccentric portion 312 is located in the second compression chamber 330. The crankshaft 310 drives the first eccentric portion 311 and the second eccentric portion 312 to rotate, so as to realize the secondary compression of the refrigerant. The bearing assembly 400 is fixedly connected to the inside of the housing 100 and is located above the motor assembly 200. The bearing assembly 400 includes a sleeve 410 and a guide plate 420, and the guide plate 420 is connected to the outside of the sleeve 410 and is located in the enclosed space of the winding 210. The sleeve 410 is sleeved on the crankshaft 310 so that the crankshaft 310 can rotate relative to the sleeve 410. The guide plate 420 is used to guide the airflow to the portion of the winding 210 protruding from the upper end surface of the stator core 220, and the airflow includes refrigerant and lubricating oil particles.

[0044] It is understandable that, by adopting the above scheme, the refrigerant compressed by the pump assembly 300 will enter the second cavity 130, then pass through the gas passage 231, then enter the first cavity 120 after passing through the winding 210, and finally discharge the housing 100 from the exhaust pipe 110. Since the airflow passes through the winding 210 under the guidance of the guide plate 420, the temperature of the winding 210 can be reduced. The winding 210 is formed by winding a plurality of copper wires, so the winding 210 acts as a filter to filter part of the lubricating oil particles mixed in the refrigerant, while the refrigerant continues to move upward into the first cavity 120. The filtered lubricating oil can flow back to the oil pool 140 to reduce the oil discharge of the compressor 1000, improve the lubrication effect in the compressor 1000, and improve the service life of the compressor 1000.

[0045] It should be noted that the guide plate 420 can guide the flow in the following manner: Figure 1 As shown, an exhaust cavity 430 is formed between the guide plate 420 and the upper end surface of the rotor 230, and an opening 431 is formed on the side of the exhaust cavity 430, and the opening 431 is arranged toward the portion of the winding 210 protruding from the upper end surface of the stator core 220. Since the guide plate 420 is fixed relative to the housing 100, and the air passage 231 rotates synchronously with the rotor 230, the relative speed between the refrigerant entering the exhaust cavity 430 and the guide plate 420 is relatively large, which is conducive to the refrigerant being thrown out from the exhaust cavity 430 through the opening 431 to the winding 210, further improving the oil-gas separation efficiency.

[0046] Reference Figure 1As shown, in the embodiment of the utility model, a first oil return channel 150 is formed between the stator core 220 and the inner wall of the housing 100, and the first oil return channel 150 communicates with the first cavity 120 and the second cavity 130. A second oil return channel 240 is formed between the stator core 220 and the rotor 230, and the second channel communicates with the first cavity 120 and the second cavity 130. Among them, the lubricating oil can flow back to the oil pool 140 through the first oil return channel 150 and the second oil return channel 240. It should be noted that the air passage 231 can also be used for oil return. For example, when the lubricating oil accumulates on the inner wall of the air passage 231 to a certain amount, the lubricating oil can flow back downward to the oil pool 140 under the action of gravity. It should also be noted that the refrigerant can also enter the first cavity 120 through the first oil return channel 150 and the second oil return channel 240. Since most of the refrigerant with lubricating oil will enter the first cavity 120 through the air passage 231 , the oil discharge amount of the compressor 1000 can be effectively reduced after the refrigerant in the air passage 231 is guided to the winding 210 .

[0047] Reference Figure 1 As shown, in the embodiment of the utility model, on the projection plane perpendicular to the rotation axis of the motor assembly 200, the projection of the air outlet of the air passage 231 is located within the outer contour line of the guide plate 420. For example, the air outlet of the air passage 231 is arranged on the bottom wall of the exhaust cavity 430, which is conducive to the air passage 231 to guide the refrigerant to the exhaust cavity 430. The opening 431 of the exhaust cavity 430 is arranged toward the winding 210, so the exhaust cavity 430 can guide the refrigerant to the winding 210. While reducing the temperature of the winding 210, the winding 210 can also filter the lubricating oil, thereby effectively reducing the oil discharge amount of the compressor 1000.

[0048] Reference Figure 4 and Figure 7 As shown, in an embodiment of the utility model, along the radial direction of the motor assembly 200, the farthest distance between the air outlet of the air passage 231 and the rotation axis of the motor assembly 200 is R1, the farthest distance between the outer edge of the guide plate 420 and the rotation axis is R2, and the farthest distance between the outer edge of the rotor 230 and the rotation axis is R3, satisfying: R1≤R2≤1.2*R3. When R2 is less than R1, it is difficult to guide the direction of the refrigerant. When R2 is greater than 1.2*R3, the guide plate 420 is prone to interfere with the winding 210, resulting in installation difficulties, and at the same time, it will hinder the refrigerant from entering the first cavity 120, reducing the ventilation efficiency. To this end, by reasonably designing the size relationship between R1, R2, and R3, it is possible to reduce the oil discharge of the compressor 1000 while ensuring the ventilation efficiency of the refrigerant.

[0049] Reference Figure 3As shown, in the embodiment of the utility model, the middle part of the guide plate 420 is provided with a through hole 421, and the edge of the through hole 421 is provided with a first flange 422 extending along the axial direction of the motor assembly 200, and the first flange 422 is sleeved on the outer side of the sleeve 410 through the through hole 421. It can be understood that the provision of the first flange 422 can increase the contact area with the sleeve 410, which is conducive to the fixed connection of the guide plate 420 and the sleeve 410 by welding, cold sleeve, hot sleeve, bonding, etc. In another embodiment, the guide plate 420 and the sleeve 410 can also be formed in one piece, and a suitable solution is selected according to the actual situation.

[0050] Reference Figure 4 and Figure 5 As shown, in another embodiment of the utility model, the connection mode of the guide plate 420 and the sleeve 410 can also be: the upper end of the sleeve 410 is provided with a second flange 411, and the second flange 411 extends along the radial direction of the motor assembly 200. The bearing assembly 400 also includes a positioning sleeve 440 and a fastener 450, and the guide plate 420 is provided with a mounting hole 423. A plurality of mounting holes 423 are provided, and the number of fasteners 450 and positioning sleeves 440 is the same as the number of mounting holes 423, for example, three. The fastener 450 is inserted through the second flange 411 and the guide plate 420, and the positioning sleeve 440 is sleeved on the fastener 450 and is located between the second flange 411 and the guide plate 420, and the two ends of the positioning sleeve 440 abut against the second flange 411 and the guide plate 420. Therefore, the positioning sleeve 440 plays a positioning role to determine the relative position between the guide plate 420 and the second flange 411. By providing a plurality of fasteners 450 and positioning sleeves 440 , the stability of the installation of the guide plate 420 can be improved, and the risk of the guide plate 420 becoming loose and falling off can be effectively avoided.

[0051] Reference Figure 6 As shown, in another embodiment of the utility model, the lower end surface of the guide plate 420 is an inclined surface 424, and the inclined surface 424 is inclined downwardly toward the direction of the winding 210. The inclined surface 424 plays a role in guiding the refrigerant to move toward the winding 210, and is also conducive to the lubricating oil gathering at the end of the inclined surface 424, so that the lubricating oil can flow back into the oil pool 140, reducing the situation of the lubricating oil being sucked in twice, so as to reduce the oil discharge amount of the compressor 1000.

[0052] Continue to refer to Figure 6 As shown, Figure 6The dotted line in represents the rotation axis of the motor assembly 200. In an embodiment of the utility model, the angle between the inclined surface 424 and the rotation axis of the motor assembly 200 is A, which satisfies: 45°≤A<90°, for example, A is 50°, 60°, 65°, 70°, 80°. When A is less than 45°, the opening 431 of the exhaust chamber 430 is set toward the rotor 230, which is difficult to play a role in guiding flow. When A is greater than 90°, that is, the inclined surface 424 extends upward, the refrigerant will be discharged along the gap between the winding 210 and the guide plate 420, and it is difficult to guide the refrigerant to the winding 210. Therefore, a reasonable design of the angle range of A can effectively guide the refrigerant to the winding 210, so that the winding 210 plays a role in filtering lubricating oil, effectively reducing the oil discharge amount of the compressor 1000.

[0053] Reference Figure 3 As shown, in the embodiment of the utility model, along the axial direction of the motor assembly 200, the thickness of the guide plate 420 is h, which satisfies: 0.8mm≤h≤1.2mm, for example, the value of h can be 0.9mm, 1mm, 1.1mm. When h is less than 0.8mm, the thickness of the guide plate 420 is relatively thin, and it is easy to cause deformation, bending and other unfavorable conditions during processing. When h is greater than 1.2mm, the thickness of the guide plate 420 is relatively thick, the strength margin is too large, and the material cost increases. Therefore, by reasonably designing the thickness of the guide plate 420, deformation, bending and the like caused by processing can be reduced or avoided, the processing efficiency can be improved, and the material usage can be reasonably controlled to reduce costs.

[0054] Reference Figure 8 As shown, in the embodiment of the utility model, the maximum distance between the lower end surface of the guide plate 420 and the upper end surface of the winding 210 is H1, and the maximum height between the upper end surface of the winding 210 and the stator core 220 is H2, which satisfies: 0≤H1≤0.4*H2, for example, H1=0.1*H2, H1=0.2*H2, H1=0.3*H2. It can be understood that, since there are many gaps between the winding 210 and the upper end surface of the stator core 220, when the exhaust cavity 430 guides the refrigerant to the position between the winding 210 and the stator core 220, the refrigerant will pass through the gap, making the effect of the winding 210 filtering the lubricating oil worse. To this end, by reasonably setting the relationship between H1 and H2, the opening 431 of the exhaust cavity 430 can be located above the winding 210, and the filtering effect of the winding 210 can be fully exerted to reduce the oil discharge amount of the compressor 1000.

[0055] Reference Figure 8As shown, in the embodiment of the present invention, the minimum distance between the lower end surface of the guide plate 420 and the upper end surface of the rotor 230 is H3, the displacement of the compressor 1000 is Q, the motor assembly 200 is provided with a channel group for conveying refrigerant, and the flow area of ​​the exhaust port of the channel group is S. It should be noted that the channel group includes the first oil return channel 150, the second oil return channel 240 and the air passage channel 231, and the flow area refers to the sum of the areas of the air outlet of the first oil return channel 150, the air outlet of the second oil return channel 240 and the air outlet of the air passage channel 231, and satisfies: 3Q / S≤H3≤6Q / S. It can be understood that when H3 is less than 3Q / S, the distance between the guide plate 420 and the upper end surface of the rotor 230 is too close, and the refrigerant will pass through the gap between the winding 210 and the stator core 220, making the effect of the winding 210 filtering the lubricating oil worse. When H3 is greater than 6Q / S, the distance between the guide plate 420 and the upper end surface of the rotor 230 is too far, and it is difficult to guide the refrigerant to the winding 210. Therefore, by reasonably designing the relationship between H3, Q and S, it is beneficial to guide the refrigerant to the winding 210 under the guidance of the guide plate 420, and effectively play the role of the winding 210 in filtering the lubricating oil.

[0056] Reference Figure 1 As shown, in the embodiment of the utility model, the motor assembly 200 further includes a first balancing block 250 and a second balancing block 260, wherein the first balancing block 250 is fixedly connected to the upper end of the rotor 230, and the second balancing block 260 is fixedly connected to the lower end of the rotor 230. The first balancing block 250 and the second balancing block 260 have irregular shapes, and the purpose is to correct the unbalance amount of the rotor 230 caused by the eccentric rotation of the crankshaft 310, so as to improve the stability of the operation of the rotor 230.

[0057] A refrigeration device according to an embodiment of the utility model comprises the compressor 1000 according to the above embodiment, and the refrigeration device may be an air conditioner or a refrigerator. The refrigeration device according to the embodiment of the utility model adopts the compressor 1000 according to the above embodiment, and the motor assembly 200 is installed inside the housing 100, and the motor assembly 200 drives the crankshaft 310 to rotate relative to the pump body assembly 300 to compress the refrigerant in the pump body assembly 300. The pump body assembly 300 discharges the compressed refrigerant into the housing 100 and flows upward, and the refrigerant can cool the motor assembly 200 after passing through the motor assembly 200. The winding 210 of the motor assembly 200 is wound around the stator core 220 and protrudes from the upper end surface of the stator core 220. The sleeve 410 of the bearing assembly 400 is sleeved on the upper end of the crankshaft 310 to improve the stability of the operation of the crankshaft 310. The guide plate 420 is connected to the outer wall of the sleeve 410 and is located in the space surrounded by the winding 210. An exhaust cavity 430 is formed between the guide plate 420 and the upper end surface of the rotor 230. The air passage 231 of the rotor 230 is used to transport the refrigerant discharged from the pump body assembly 300 to the exhaust cavity 430, and the exhaust cavity 430 then guides the refrigerant to the winding 210. The winding 210 has the function of a filter screen, which can filter the lubricating oil particles mixed in the refrigerant. The refrigerant continues to flow to the top of the housing 100, and the filtered lubricating oil can flow back to the oil pool 140 to reduce the oil discharge of the compressor 1000 and improve the service life of the compressor 1000. Since the guide plate 420 is fixed relative to the shell 100 and the air passage 231 rotates synchronously with the rotor 230, the relative speed between the refrigerant entering the exhaust chamber 430 and the guide plate 420 is relatively large, which is beneficial for the refrigerant to be thrown out from the exhaust chamber 430 through the opening 431 to the winding 210, further improving the oil-gas separation efficiency.

[0058] Since the refrigeration device adopts all the technical solutions of the compressor 1000 of the above embodiment, it has at least all the beneficial effects brought by the technical solutions of the above embodiment, which will not be repeated here.

[0059] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A compressor, characterized in that include: The housing has an oil pool formed at the bottom for storing lubricating oil; A motor assembly is arranged inside the housing and above the oil pool, the motor assembly includes a winding, a stator core and a rotor, the stator core is arranged around the circumference of the housing, the winding is wound around the stator core and protrudes from the upper end surface of the stator core, the rotor is arranged on the inner side of the stator core, and the rotor is provided with a penetrating air passage; A pump assembly is disposed inside the housing and below the motor assembly; A crankshaft, fixedly connected to the rotor and rotatable under the drive of the motor assembly, is disposed in the pump body assembly; A bearing assembly is fixedly connected to the interior of the housing and is located above the motor assembly. The bearing assembly includes a sleeve and a guide plate connected to the outside of the sleeve. The sleeve is sleeved on the crankshaft so that the crankshaft can rotate relative to the sleeve. The guide plate is located in the enclosed space of the winding. The guide plate is used to guide the airflow flowing through the air passage to the portion of the winding protruding from the upper end surface of the stator core.

2. The compressor according to claim 1, characterized in that: On a projection plane perpendicular to the rotation axis of the motor assembly, the projection of the air outlet of the air passage is located within the projection of the outer contour line of the guide plate.

3. The compressor according to claim 2, characterized in that: Along the radial direction of the motor assembly, the farthest distance between the air outlet of the air passage and the rotation axis of the motor assembly is R1, the farthest distance between the outer edge of the guide plate and the rotation axis is R2, and the farthest distance between the outer edge of the rotor and the rotation axis is R3, satisfying: R1≤R2≤1.2*R3.

4. The compressor according to claim 1, characterized in that: The lower end surface of the guide plate is an inclined surface, and the inclined surface is inclined downward in a direction toward the winding.

5. The compressor according to claim 4, characterized in that: The angle A between the inclined surface and the rotation axis of the motor assembly satisfies: 45°≤A<90°.

6. The compressor according to claim 1, characterized in that: Along the axial direction of the motor assembly, the thickness of the guide plate is h, satisfying: 0.8mm≤h≤1.2mm.

7. The compressor according to claim 1, characterized in that: The guide plate is provided with a through hole, and the edge of the through hole is provided with a first flange extending along the axial direction of the motor component, and the first flange is sleeved on the outer side of the shaft sleeve through the through hole.

8. The compressor according to claim 1, characterized in that: The upper end of the shaft sleeve is provided with a second flange extending radially along the motor assembly, the bearing assembly also includes a positioning sleeve and a fastener, the guide plate is provided with a mounting hole, the fastener is passed through the second flange and the guide plate, the positioning sleeve is sleeved on the fastener and is located between the second flange and the guide plate, and the two ends of the positioning sleeve abut against the second flange and the guide plate.

9. The compressor according to claim 1, characterized in that: The maximum distance between the lower end surface of the guide plate and the upper end surface of the winding is H1, and the maximum height between the upper end surface of the winding and the stator core is H2, satisfying: 0≤H1≤0.4*H2.

10. The compressor according to claim 1, characterized in that: The minimum distance between the lower end surface of the guide plate and the upper end surface of the rotor is H3, the displacement of the compressor is Q, the motor assembly is provided with a channel group for conveying refrigerant, and the flow area of ​​the air outlet of the channel group is S, satisfying: 3Q / S≤H3≤6Q / S.

11. Refrigeration equipment, characterized in that: Comprising the compressor according to any one of claims 1 to 10.

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