Compressor, air conditioner

Abstract

This invention provides a compressor and an air conditioner. The compressor includes a housing and an oil distribution pipe. The housing has a compressor discharge pipe, and an oil sump is formed at the bottom of the housing cavity. The top end of the oil distribution pipe communicates with the compressor discharge pipe, and the bottom end of the oil distribution pipe protrudes from the inner wall of the housing to communicate with the housing cavity. The height of the bottom end of the oil distribution pipe corresponds to the upper limit oil level of the oil sump. This invention effectively reduces the compressor's discharge oil rate and ensures effective oil return of lubricating oil in the compressor cavity simply by adjusting the relative position of the bottom end of the oil distribution pipe and the inner wall of the housing. The structure is extremely simple, requiring no other complex assembly steps, and greatly reducing the compressor's manufacturing cost.

Description

Technical Field

[0001] This invention belongs to the field of compressor design technology, specifically relating to a compressor and an air conditioner. Background Technology

[0002] The compressor is the heart of an air conditioning system, and its performance directly affects the air conditioner's energy efficiency ratio. Scroll compressors are positive displacement compressors. An electric motor drives a crankshaft to rotate, and the moving scroll revolves around a stationary scroll under the crankshaft's influence, thus achieving periodic changes in the sealed volume and compressing the gas. During compressor discharge, due to the mutual solubility of refrigerant and lubricating oil, some lubricating oil is discharged along with the refrigerant, leading to a reduction in the compressor's lubricating oil level. Furthermore, excessive lubricating oil mixed with the refrigerant reduces heat exchange efficiency and lowers energy efficiency.

[0003] To overcome the shortcomings of the prior art, a compressor oil separator (such as...) has been proposed in related technologies. Figure 6 As shown, the oil distributor is located inside the housing, which has oil equalization holes that drain oil from the housing. The oil distributor is positioned at the location of the oil equalization holes and can also block them, thus isolating the influence of wall backflow and preventing the fluid flowing down the wall from being directly sucked away by the oil equalization pipe, reducing the compressor's oil discharge rate. However, in actual use, this sheet metal part needs to be welded to the inner surface of the housing, which is relatively complex in structure and process, increasing the cost of the compressor. Summary of the Invention

[0004] Therefore, the present invention provides a compressor and an air conditioner that can solve the technical problem in the prior art where the component structure design and assembly process used to prevent the backflow of lubricating oil on the inner wall of the compressor casing from being directly sucked away by the oil distribution pipe, resulting in an excessively high oil discharge rate, is relatively complex, leading to high compressor costs.

[0005] To address the above problems, the present invention provides a compressor, comprising:

[0006] The housing includes a compressor exhaust pipe, an oil sump at the bottom of the housing cavity, a top end of the oil distribution pipe communicating with the compressor exhaust pipe, and a bottom end of the oil distribution pipe protruding from the inner wall of the housing to communicate with the housing cavity. The bottom end of the oil distribution pipe is positioned at a height corresponding to the upper limit oil level of the oil sump.

[0007] In some embodiments, the compressor further includes:

[0008] The motor assembly includes a stator located above the bottom end of the oil equalization pipe. The diameter of the central through hole of the stator is Dd. The outer shell includes a cylindrical body. The stator is fixedly assembled to the inner wall surface of the cylindrical body, and the diameter of the inner wall surface of the cylindrical body is Db. The bottom end of the oil equalization pipe extends along the diameter direction of the outer shell, and the length protruding from the inner wall surface of the outer shell is l, where 2mm < l < (Db-Dd) / 2.

[0009] In some implementations...

[0010] 2mm<L≤(Db-Dd) / 3.

[0011] In some implementations...

[0012] The motor assembly also includes a rotor located within the central through hole, and the bottom end of the oil distribution pipe is a bend that bends downstream of the rotor's rotation direction.

[0013] In some implementations...

[0014] The bend includes a straight pipe section extending along the diameter direction of the outer casing and a bend section bent towards the downstream side of the rotor's rotation direction, wherein the bending angle formed between the straight pipe section and the bend section is α, and 30°≤α≤90°.

[0015] In some implementations...

[0016] The straight pipe section gradually increases in height from the outside to the inside along the diameter of the outer shell.

[0017] In some embodiments, the compressor further includes:

[0018] The crankshaft and the lower support are provided. The bottom end of the crankshaft is rotatably supported on the lower support, which is assembled on the inner wall of the housing. The bottom end of the oil distribution pipe is located in the area between the lower support and the stator.

[0019] In some implementations...

[0020] There is an oil return channel between the outer peripheral wall of the stator and the inner wall of the outer casing. When projected onto any radial plane of the stator, the bottom end does not intersect with the oil return channel.

[0021] In some implementations...

[0022] The stator has a tangent edge on its outer peripheral wall that extends through its two end faces along its axial direction, and the oil return channel is formed between the tangent edge and the inner wall surface of the outer casing.

[0023] The present invention also provides an air conditioner, including the compressor described above.

[0024] The compressor and air conditioner provided by this invention have the following beneficial effects:

[0025] Unlike existing technologies that have a separate oil distribution structure at the bottom of the oil distribution pipe, this invention sets the oil distribution pipe to protrude from the inner wall of the outer casing. This effectively prevents the lubricating oil flowing back on the inner wall at the corresponding position from being drawn in by the high-speed airflow discharged from the compressor exhaust pipe, which would lead to excessively high compressor exhaust oil discharge rate and insufficient lubricating oil in the oil sump. In other words, this invention can effectively reduce the compressor exhaust oil discharge rate and ensure effective oil return of lubricating oil in the compressor cavity simply by adjusting the relative position of the bottom of the oil distribution pipe and the inner wall of the outer casing. The structure is extremely simple and does not require other complex assembly steps, which greatly reduces the compressor manufacturing cost.

[0026] By limiting the bottom end of the oil distribution pipe to the area below the stator, the flow of refrigerant and lubricating oil into the oil distribution pipe caused by the high-speed rotating rotor can be reduced to a certain extent, thereby further preventing the compressor from discharging oil at an excessively high rate. At the same time, limiting the protruding length of the bottom end of the oil distribution pipe to more than 2mm ensures that the lubricating oil flowing back from the inner wall of the outer casing will turn up to the bottom inlet along the oil distribution pipe.

[0027] By designing a bent tube that bends downstream of the rotor's rotation direction, the bent tube is aligned with the rotor's rotation direction, which is also the direction of flow of the gas-liquid mixture in the containment cavity. This further reduces the direct discharge of the aforementioned gas-liquid mixture from the oil equalization pipe, thereby further reducing the compressor's exhaust oil discharge rate.

[0028] The straight pipe section gradually decreases in height from the radial inside to the outside of the outer casing, which effectively prevents the lubricating oil flowing back from the inner wall of the outer casing from spreading along the outer wall of the straight pipe section to the bend section and being sucked in at the inlet of the oil distribution pipe, further ensuring the smooth return of the lubricating oil.

[0029] The lower support set at the top of the oil sump below the accommodating cavity can provide reliable pivot support for the bottom of the crankshaft. On the other hand, it can also provide a certain degree of shielding for the upper surface of the oil sump, preventing large fluctuations in the oil level caused by the high-speed rotation of the rotor above. This reduces the probability of lubricating oil being sucked into the oil distribution pipe. Since the oil distribution pipe in this invention is set in the area between the lower support and the stator, the phenomenon of excessively high oil discharge rate caused by disturbances in the oil level of the lower oil sump can be effectively eliminated.

[0030] In this invention, the bottom end of the oil distribution pipe and the oil return channel are arranged sequentially and at intervals in the circumferential direction of the compressor. This can minimize the risk of lubricating oil flowing back from the upper oil return channel directly reaching the outer wall of the oil distribution pipe along the inner wall of the outer casing, thus ensuring smoother oil return.

[0031] By cutting the outer peripheral wall of the stator, the contact area between it and the outer shell is reduced, which reduces the difficulty of assembling the stator and the outer shell and simplifies the structure. Attached Figure Description

[0032] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0033] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0034] Figure 1 This is a schematic diagram of the internal structure of the compressor in an embodiment of the present invention;

[0035] Figure 2 for Figure 1 A schematic diagram of the cross-section of AA;

[0036] Figure 3 for Figure 2 A magnified view of a section at point A in the middle;

[0037] Figure 4 This is a schematic diagram of the bottom structure of the oil equalization pipe in this invention (projected downwards along the axial direction of the compressor);

[0038] Figure 5 This is a three-dimensional structural diagram of the oil distribution pipe in this invention. The arrows in the diagram indicate the flow direction of the lubricating oil inside.

[0039] Figure 6 This is an oil separation structure in the prior art that reduces the oil discharge rate of the oil distribution pipe.

[0040] The reference numerals in the attached figures are as follows:

[0041] 1. Outer casing; 11. Compressor exhaust pipe; 121. Cylinder; 122. Upper cover; 123. Lower cover; 2. Oil distribution pipe; 21. Straight pipe section; 22. Bend pipe section; 101. Stator; 1011. Oil return channel; 102. Rotor; 103. Crankshaft; 104. Lower support; 1051. Stationary scroll; 10511. Exhaust port; 1052. Moving scroll; 106. Upper support. Detailed Implementation

[0042] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0044] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0045] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0046] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0047] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0048] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0049] The main function of the oil equalization pipe in a scroll compressor is to achieve oil-gas separation during discharge, returning excess oil in the discharge pipe to the oil sump through the equalization pipe, thereby reducing the oil circulation rate. Traditional scroll compressor oil equalization pipes are mainly direct-flow pipes perpendicular to the compressor casing, not extending beyond it. As the high-frequency motor rotates counter-clockwise, the high-pressure oil-gas mixture at the bottom of the compressor enters the equalization pipe along the rotation direction, and then flows back to the discharge pipe to exit the compressor. This leads to a high oil content and slow oil return during high-frequency operation, resulting in insufficient lubrication of the compressor. In severe cases, this increases the risk of compressor failure and reduces compressor efficiency.

[0050] See also Figures 1 to 5 As shown, according to an embodiment of the present invention, a compressor is provided, particularly a scroll compressor, comprising:

[0051] The housing 1 and the oil distribution pipe 2 are provided. The housing 1 has a compressor exhaust pipe 11. An oil sump is formed at the bottom of the accommodating cavity of the housing 1. The top end of the oil distribution pipe 2 is connected to the compressor exhaust pipe 11. The bottom end of the oil distribution pipe 2 protrudes from the inner wall of the housing 1 to communicate with the accommodating cavity. The main pipeline of the oil distribution pipe 2 is located outside the housing 1. The bottom end of the oil distribution pipe 2 is set at a height corresponding to the upper limit oil level of the oil sump. That is, the bottom end of the oil distribution pipe 2 is set at a height approximately equal to the upper limit oil level of the oil sump. This allows the lubricating oil in the oil sump to enter the external system pipeline under the ejection action of the compressor exhaust pipe 11 when the upper limit oil level is reached, ensuring sufficient lubrication of the external system pipeline.

[0052] Unlike existing technologies that separately set an oil distribution structure at the bottom of the oil distribution pipe 2, this invention sets the oil distribution pipe 2 to protrude from the inner wall of the outer casing 1. This effectively prevents the lubricating oil flowing back on the inner wall at the corresponding position from being drawn in by the high-speed airflow discharged from the compressor exhaust pipe 11, which would lead to excessively high compressor exhaust oil discharge rate and insufficient lubricating oil in the oil sump. In other words, this invention can effectively reduce the compressor exhaust oil discharge rate and ensure effective oil return of lubricating oil in the compressor accommodating cavity simply by adjusting the relative position of the bottom of the oil distribution pipe 2 and the inner wall of the outer casing 1. The structure is extremely simple and does not require other complex assembly steps (the structure at this position can be assembled simply by welding the bottom of the oil distribution pipe 2 to the outer casing 1), which greatly reduces the compressor manufacturing cost.

[0053] In some embodiments, the compressor further includes: a motor assembly (not shown in the figure), the motor assembly including a stator 101, the stator 101 being located above the bottom end of the oil equalization pipe 2, the diameter of the central through hole of the stator 101 being Dd, the outer shell 1 including a cylindrical body 121, the stator 101 being fixedly assembled to the inner wall surface of the cylindrical body 121 and the diameter of the inner wall surface of the cylindrical body 121 being Db, the bottom end of the oil equalization pipe 2 extending along the diameter direction of the outer shell 1, and the length protruding from the inner wall surface of the outer shell 1 being l, 2mm < l < (Db-Dd) / 2, further, 2mm < L ≤ (Db-Dd) / 3.

[0054] In this technical solution, the bottom end of the oil equalization pipe 2 is limited to the area below the stator 101, which can reduce the flow of refrigerant and lubricating oil into the oil equalization pipe 2 caused by the disturbance of the high-speed rotating rotor 102 to a certain extent, thereby further preventing the compressor exhaust oil discharge rate from being too high. At the same time, the protrusion length of the bottom end of the oil equalization pipe 2 is limited to more than 2mm, which can ensure that the lubricating oil flowing back from the inner wall of the outer casing 1 is turned up to the bottom inlet along the oil equalization pipe 2.

[0055] As previously mentioned, the motor assembly also includes a rotor 102 located within the central through-hole; in some embodiments, see details below. Figures 2 to 4 As shown, the bottom end of the oil equalization pipe 2 is a bend, which bends downstream of the rotation direction of the rotor 102. It should be understood that the downstream direction of the rotation direction of the rotor 102 is not completely coincident, but rather that the rotation direction and the bending direction are roughly the same, rather than opposite.

[0056] In this technical solution, the structural design of the bent pipe that bends downstream of the rotation direction of the rotor 102 makes the bent pipe follow the rotation direction of the rotor 102, that is, the flow direction of the gas-liquid mixture in the accommodating cavity. This can further reduce the direct discharge of the gas-liquid mixture from the oil equalization pipe 2 and further reduce the discharge oil rate of the compressor.

[0057] See details Figure 4 As shown, the bend includes a straight pipe section 21 extending along the diameter direction of the outer casing 1 and a bend section 22 bent towards the downstream side of the rotation direction of the rotor 102. The bending angle formed between the straight pipe section 21 and the bend section 22 is α, where 30°≤α≤90°. In this technical solution, when α bends beyond 90°, its bending direction will have a portion that is opposite to the flow direction of the gas-liquid mixture, which will cause this portion of the gas-liquid mixture to enter the oil equalization pipe 2 under the rotation of the rotor 102.

[0058] In a preferred embodiment, the straight pipe section 21 increases in height from the outside to the inside along the diameter direction of the outer casing 1, that is, the straight pipe section 21 decreases in height from the radial inside to the outside of the outer casing 1. This can effectively prevent the lubricating oil flowing back on the inner wall of the outer casing 1 from spreading along the outer wall of the straight pipe section 21 to the bend section 22 and being sucked in at the inlet of the oil distribution pipe 2, further ensuring the smooth return of the lubricating oil.

[0059] In some embodiments, the compressor further includes a crankshaft 103 and a lower support 104. It is understood that the lower support 104 has multiple through-holes (not labeled in the figure) extending through it. The bottom end of the crankshaft 103 is rotatably supported on the lower support 104. The lower support 104 is assembled to the inner wall of the housing 1, and the bottom end of the oil distribution pipe 2 is located in the area between the lower support 104 and the stator 101. The aforementioned stator 101 and lower support 104 can both be assembled with the inner wall of the housing 1 by an interference fit.

[0060] In this technical solution, the lower support 104 installed at the top of the oil sump below the accommodating cavity can provide reliable pivot support for the bottom end of the crankshaft 103. On the other hand, it can also provide some shielding for the upper surface of the oil sump, preventing large fluctuations in the oil level caused by the high-speed rotation of the rotor 102 above. This reduces the probability of the lubricating oil in the oil sump being sucked in by the oil equalization pipe 2. Since the oil equalization pipe 2 in this invention is located in the area between the lower support 104 and the stator 101, the phenomenon of excessively high oil discharge rate caused by disturbances in the oil level of the lower oil sump can be effectively eliminated.

[0061] In some embodiments, an oil return channel 1011 is provided between the outer peripheral wall of the stator 101 and the inner wall of the outer casing 1 to ensure that the lubricating oil on the upper pump assembly can flow back smoothly. Projected on any radial plane of the stator 101, the bottom end and the oil return channel 1011 do not intersect, that is, the two do not overlap in the projection on the radial plane. In other words, the bottom end of the oil equalization pipe 2 and the oil return channel 1011 are arranged sequentially and at intervals in the circumferential direction of the compressor in this invention. This can minimize the lubricating oil flowing back from the upper oil return channel 1011 from directly to the outer wall of the oil equalization pipe 2 along the inner wall of the outer casing 1, thus ensuring further smooth oil return.

[0062] In a specific embodiment, the stator 101 has a cut edge on its outer peripheral wall that extends through its two end faces along its axial direction. The cut edge and the inner wall surface of the outer casing 1 form the oil return channel 1011. Multiple cut edges can be provided, thus corresponding to multiple oil return channels 1011. By processing the cut edge of the outer peripheral wall of the stator 101, the contact area between it and the outer casing 1 is reduced, which can reduce the assembly difficulty of the stator 101 and the outer casing 1 and simplify the structure.

[0063] See details Figure 1 As shown, the compressor also includes a stationary scroll 1051 and a moving scroll 1052. The bottom surface of the moving scroll 1052 is supported by an upper bracket 106 via a cross-shaped slip ring (not labeled in the figure). Meanwhile, the stationary scroll 1051 is fastened to the moving scroll 1052 to form a compression chamber. Under the driving action of the crankshaft 103, the moving scroll 1052 moves relative to the stationary scroll 1051 to achieve the purpose of vortex compression of the refrigerant.

[0064] The outer periphery of the aforementioned upper support 106 is fixedly connected to the inner wall of the outer casing 1, for example, by welding, interference fit, or other means. The central region of the stationary scroll 1051 is provided with an exhaust port 10511, which communicates with the accommodating cavity of the outer casing 1 and then with the aforementioned compressor exhaust pipe 11. The stationary scroll 1051 is also provided with a corresponding intake port (not shown in the figure).

[0065] See the aforementioned outer casing 1. Figure 1As shown, it includes a central cylindrical body 121 and an upper cover 122 and a lower cover 123 respectively connected (e.g., welded) to the top and bottom ends of the cylindrical body 121. The aforementioned upper support 106, lower support 104 and stator 101 are all assembled with the inner wall surface of the aforementioned cylindrical body 121.

[0066] According to an embodiment of the present invention, an air conditioner is also provided, including the above-described compressor, especially the aforementioned scroll compressor.

[0067] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the protection scope of the present invention.

Claims

1. A compressor characterized by, include: The housing (1) and the oil distribution pipe (2) are provided. The housing (1) has a compressor exhaust pipe (11). An oil sump is formed at the bottom of the accommodating cavity of the housing (1). The top end of the oil distribution pipe (2) is connected to the compressor exhaust pipe (11). The bottom end of the oil distribution pipe (2) protrudes from the inner wall of the housing (1) to communicate with the accommodating cavity. The bottom end of the oil distribution pipe (2) is set at a height corresponding to the upper limit oil level of the oil sump. The housing (1) also includes a motor assembly, which includes a stator (101) and a central through hole in the stator (101). The rotor (102) inside the house has an oil distribution pipe (2) with a bend at the bottom end. The bend bends downstream of the rotor (102) in the direction of rotation. The bend includes a straight pipe section (21) extending along the diameter of the housing (1). The straight pipe section (21) increases in height from the outside to the inside along the diameter of the housing (1). The bend also includes a bend section (22) bending downstream of the rotor (102) in the direction of rotation. The bending angle between the straight pipe section (21) and the bend section (22) is a, where 30°≤a≤90°.

2. The compressor according to claim 1, characterized in that, Also includes: The stator (101) is located above the bottom end of the oil equalization pipe (2). The diameter of the central through hole of the stator (101) is Dd. The outer shell (1) includes a cylinder (121). The stator (101) is fixedly assembled on the inner wall surface of the cylinder (121) and the diameter of the inner wall surface of the cylinder (121) is Db. The bottom end of the oil equalization pipe (2) extends along the diameter direction of the outer shell (1) and protrudes from the inner wall surface of the outer shell (1) by a length of l, 2mm < l < (Db-Dd) / 2.

3. The compressor according to claim 2, characterized in that, 2mm<L≤(Db-Dd) / 3.

4. The compressor according to claim 2, characterized in that, Also includes: The crankshaft (103) and the lower support (104) are provided. The bottom end of the crankshaft (103) is rotatably supported on the lower support (104). The lower support (104) is assembled on the inner wall of the housing (1). The bottom end of the oil distribution pipe (2) is located in the area between the lower support (104) and the stator (101).

5. The compressor according to claim 2, characterized in that, There is an oil return channel (1011) between the outer peripheral wall of the stator (101) and the inner wall of the outer shell (1). The bottom end of the stator (101) does not intersect with the oil return channel (1011) when projected onto any radial plane of the stator (101).

6. The compressor according to claim 5, characterized in that, The stator (101) has a tangent on its outer peripheral wall that extends through its two end faces along its axial direction, and the tangent forms the oil return channel (1011) between the oil return channel and the inner wall of the outer casing (1).

7. An air conditioner, characterized in that, The compressor includes any one of claims 1 to 6.

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