Stopping piece, rotor structure, motor and compressor

Abstract

The invention provides a stop piece, a rotor structure, a motor and a compressor, the stop piece is used for stopping the upper end of a magnet on a rotor core, the stop piece is provided with an inner cavity and an oil-gas separation structure arranged in the inner cavity, the inner cavity is provided with a flow inlet, the inner cavity is communicated with a rotor circulation hole in the rotor core through the flow inlet, and the oil-gas separation structure is arranged in the oil-gas separation structure. Airflow of the rotor circulation hole flows into the inner cavity through the flow inlet; and the stopper is used for driving the oil-gas separation structure to rotate under the driving of the rotor core, so that the oil-gas separation structure performs oil-gas separation on the gas flow flowing into the inner cavity. According to the technical scheme, due to the fact that the stopping piece is the part closest to the upper end of the rotor circulation hole, the air flow of the rotor circulation hole is introduced into the stopping piece for oil-gas separation, diffusion of the air flow of the rotor circulation hole can be reduced, and therefore the oil-gas separation effect of the air flow of the rotor circulation hole can be improved; the exhaust oil content of the compressor is reduced, and the problem of high oil content at high-frequency ultrahigh rotating speed is solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of compressors, and in particular relates to a stopper, a rotor structure, a motor and a compressor. Background Art

[0002] With the widespread use of variable-frequency air conditioners, users have higher and higher requirements on the performance and noise of air conditioners. The key component that determines these two factors is the compressor of the outdoor unit. Therefore, improving the efficiency and reducing the noise of the compressor are the key to improving the quality of air conditioners.

[0003] The rotor compressor is mainly composed of a housing, a pump body and a motor. The motor consists of a stator and a rotor. The rotor is connected to the pump body. The rotor includes a rotor core, a magnet, a balance block and an oil retaining structure. When the compressor is running, the stator is connected to a three-phase power supply, and the rotating magnetic field drives the rotor to rotate. The rotor drives the pump body to perform compression movement through the crankshaft. When the refrigerant is compressed, the refrigerant oil is mixed, and the compressed high-pressure gas is discharged and flows into the upper chamber of the compressor through the rotor flow hole on the rotor core.

[0004] The oil retaining structure is generally arranged above the rotor and fixedly connected to the rotating shaft. The oil retaining structure rotates under the drive of the rotating shaft. The airflow flowing out of the rotor through-hole flows through the oil retaining structure during the upward flow process. The refrigerant and the refrigeration oil are separated by the buffering of the oil retaining structure.

[0005] The above-mentioned oil retaining structure is generally an open structure. The airflow of the rotor flow hole tends to diffuse to the four sides during the upward flow process, causing part of the airflow to bypass the oil retaining structure without oil-gas separation. This will make the airflow of the rotor flow hole insufficiently separated from the oil and gas, so that part of the refrigerant oil inside the compressor will be discharged with the exhaust airflow and enter the system, making it more difficult to return the oil to the compressor, resulting in a lack of refrigerant oil in the compressor, causing poor lubrication of the compressor parts, increased wear, and the inability to ensure the reliability of the compressor operation. In addition, an increase in the oil discharge rate will increase the amount of refrigerant oil entering the condenser and evaporator, reducing the heat exchange capacity of the air conditioning system and worsening the heat exchange conditions, thereby causing the performance of the air conditioning system to decline. Summary of the invention

[0006] Therefore, the present invention provides a stopper, a rotor structure, a motor and a compressor, the main technical problem to be solved is: how to improve the oil-gas separation effect of the airflow in the rotor flow hole to reduce the exhaust oil content of the compressor.

[0007] In order to solve the above problem, the present invention provides a stopper for stopping the upper end of the magnet on the rotor core, the stopper having an inner cavity and an oil-gas separation structure arranged in the inner cavity, the inner cavity having an inlet, the inner cavity being connected with the rotor flow hole on the rotor core through the inlet, so that the airflow of the rotor flow hole flows into the inner cavity through the inlet;

[0008] Wherein, the stopper is used to drive the oil-gas separation structure to rotate under the drive of the rotor core, so that the oil-gas separation structure can separate the oil and gas of the airflow flowing into the inner cavity.

[0009] In some embodiments, the oil-gas separation structure includes a first oil-gas separation component, which is opposite to the inlet so as to collide with the airflow of the inlet to separate the oil and gas in the airflow.

[0010] In some embodiments, the first oil-gas separator has a first surface opposite to the inlet, and the first oil-gas separator collides with the airflow of the inlet through the first surface;

[0011] The stopper is provided with a first outlet, and the first outlet is arranged corresponding to the first surface, so that the first surface can guide at least part of the fluid after oil and gas separation to the first outlet.

[0012] In some embodiments, the first oil-gas separator separates the inner cavity into a first chamber and a second chamber, the first chamber has the inlet; the first oil-gas separator is provided with a first flow hole connecting the first chamber and the second chamber;

[0013] The oil-gas separation structure further includes a second oil-gas separation component, which is disposed in the second chamber and is used for performing oil-gas separation on the airflow of the first flow hole.

[0014] In some embodiments, the second oil-gas separation element is opposite to the first flow hole so as to collide with the airflow of the first flow hole to separate the oil and gas in the airflow.

[0015] In some embodiments, the second oil-gas separator has a second surface opposite to the first flow hole, and the second oil-gas separator collides with the airflow of the first flow hole through the second surface; the end surface of the first oil-gas separator facing away from the first chamber is the third surface;

[0016] Wherein, in the cross section coinciding with the center line of the stopper, the tangent line of the edge of the second surface intersects with the third surface, so that the second surface can guide at least part of the fluid after oil and gas separation to the third surface.

[0017] In some embodiments, the stopper is further provided with a second outlet, and the second outlet is arranged corresponding to the third surface, so that the third surface can guide at least part of the fluid after oil and gas separation to the second outlet.

[0018] In some embodiments, when the stopper is provided with a first outlet, an oil guiding structure is provided in the first chamber, and the oil guiding structure is used to guide the oil at the bottom of the first chamber to the first outlet.

[0019] In some embodiments, the first outlet is disposed at an upper portion of a side wall of the first chamber, and a lower portion of the side wall of the first chamber is inclined outward from bottom to top to cooperate with a middle portion of the side wall of the first chamber to form the oil guide structure.

[0020] In some embodiments, the end surface of the first oil-gas separator, which is away from the first chamber, is in a first concave shape, and the bottom of the first concave shape has a first oil return port communicating with the first chamber;

[0021] And / or, a third outlet is provided at the upper portion of the second chamber, a side of the second oil-gas separator facing away from the first oil-gas separator is opposite to the third outlet, and a side of the second oil-gas separator facing away from the first oil-gas separator is in a second concave shape, and a bottom of the second concave shape has a second oil return port connected to the first chamber.

[0022] In some embodiments, when the end face of the first oil-gas separator facing away from the first chamber is in a first concave shape, and the bottom of the first concave shape has a first oil return port connected to the first chamber, and the side of the second oil-gas separator facing away from the first oil-gas separator is in a second concave shape, and the bottom of the second concave shape has a second oil return port connected to the first chamber, the second oil return port is opposite to the first oil return port, so that the second oil return port is connected to the first chamber through the first oil return port.

[0023] In some embodiments, the volume of the first chamber is T1, and the volume of the second chamber is T2, wherein 5>T1 / T2>4.

[0024] In some embodiments, the circumferential side wall of the stopper is partially solid and partially hollow in the circumferential direction.

[0025] The present invention also provides a rotor structure, comprising the stopper described in any one of the above, wherein the stopper is arranged at the upper end of the rotor core.

[0026] In some embodiments, the end surface of the upper end of the rotor core covers the inlet, and the opening of the rotor circulation hole at the upper end of the rotor core is opposite to the inlet, so that the rotor circulation hole is connected to the inlet.

[0027] In some embodiments, when the oil-gas separation structure includes a first oil-gas separation component, and the first oil-gas separation component separates the inner cavity into a first chamber and a second chamber, the volume of the second chamber is T2;

[0028] The number of the rotor flow holes is more than two, and the sum of the flow areas of the rotor flow holes is S; wherein, The unit of T2 is cubic meter and the unit of S is square meter.

[0029] In some embodiments, the rotor structure further includes another stopper, which is disposed at the lower end of the rotor core and is used to stop the lower end of the magnet on the rotor core;

[0030] Among them, the other stopper has a second flow hole passing through both ends, the second flow hole is an expanded hole, and the small mouth end of the second flow hole is opposite to the opening of the rotor flow hole at the lower end of the rotor core, so that the second flow hole is connected with the rotor flow hole.

[0031] In some embodiments, the circumferential side wall of the other stopper is partially solid and partially hollow in the circumferential direction.

[0032] In some embodiments, when the stopper has a first outlet, a second outlet and a third outlet at the same time, the area of ​​the third outlet is S1; the number of the first outlets is two or more, and they are evenly arranged around the circumference of the stopper, and the sum of the areas of the first outlets is S2; the number of the second outlets is two or more, and they are evenly arranged around the circumference of the stopper, and the sum of the areas of the second outlets is S3; the number of the rotor circulation holes is two or more, and the sum of the outlet areas of the rotor circulation holes is S; wherein, S1+S2+S3≥S.

[0033] The present invention also provides a motor, which comprises the rotor structure described in any one of the above.

[0034] The present invention also provides a compressor, which comprises the motor described above.

[0035] A stopper, a rotor structure, a motor and a compressor provided by the present invention have the following beneficial effects:

[0036] 1. Since the stopper is the component closest to the upper end of the rotor flow hole, the diffusion of the airflow in the rotor flow hole can be reduced by introducing the airflow in the rotor flow hole into the stopper for oil-gas separation, thereby improving the oil-gas separation effect of the airflow in the rotor flow hole, reducing the exhaust oil content of the compressor, and solving the problem of high oil content at high frequency and ultra-high speed.

[0037] 2. Since the end face of the upper end of the rotor core seals the inlet of the inner cavity of the stopper, the airflow of the rotor flow hole can all flow into the inner cavity of the stopper through the inlet, thereby preventing the airflow of the rotor flow hole from diffusing and allowing the airflow of the rotor flow hole to be completely separated from the oil and gas inside the stopper, thereby greatly improving the oil-gas separation effect of the airflow of the rotor flow hole.

[0038] 3. The outer surface of the stopper is a hemispherical surface, and the outer surface of the other stopper is also a part of the spherical surface. This can effectively reduce the airflow disturbance when the rotor rotates, effectively weaken the aerodynamic noise, reduce the compressor noise, improve the user experience, and improve the overall performance of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. The drawings described below are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0040] Figure 1 is a schematic structural diagram of a stopper provided by an embodiment of the present invention;

[0041] Figure 2 yes Figure 1 A schematic structural diagram of the stopper from another perspective;

[0042] Figure 3 is a cross-sectional view of the stopper;

[0043] Figure 4 is a schematic diagram of a rotor structure provided by an embodiment of the present invention;

[0044] Figure 5 is a cross-sectional view of the rotor structure;

[0045] Figure 6 It is an exploded schematic diagram of the rotor structure;

[0046] Figure 7 is a schematic structural diagram of another stopper provided by an embodiment of the present invention;

[0047] Figure 8 is a cross-sectional view of another stopper.

[0048] The accompanying drawings are marked as follows:

[0049] 1. Oil-gas separation structure; 2. First oil-gas separation member; 3. Second oil-gas separation member; 4. Rivet; 1a. Cover; 1b. Ring member; 20. First oil return port; 21. First surface; 22. Third surface; 23. First flow hole; 30. Second oil return port; 31. Second surface; 32. Second concave shape; 33. Connecting portion; 34. Flow port; 10. Inner cavity; 10a. First chamber; 10b. Second chamber; 101. First outlet; 102. Second outlet; 103. Third outlet; 104. Lower portion of the side wall of the first chamber; 105. Middle portion of the side wall of the first chamber; 106. Inlet; 201. Rotor flow hole; 301. Second flow hole; 100. Stopper; 200. Rotor core; 300. Another stopper; 311. Tangent of the edge of the second surface. DETAILED DESCRIPTION

[0050] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0051] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0052] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0053] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0054] See also Figure 1-6 As shown, according to an embodiment of the present invention, a stopper 100 is provided, and the stopper 100 is used to stop the upper end of the magnet on the rotor core 200. In some application occasions, the stopper 100 may also be referred to as an upper stopper.

[0055] like Figure 3 As shown, the stopper 100 has an inner cavity 10 and an oil-gas separation structure 1 disposed in the inner cavity 10. The inner cavity 10 has an inlet 106, through which the inner cavity 10 is connected to the rotor flow hole 201 on the rotor core 200, so that the airflow of the rotor flow hole 201 flows into the inner cavity 10 through the inlet 106. The stopper 100 is used to drive the oil-gas separation structure 1 to rotate under the drive of the rotor core 200, so that the oil-gas separation structure 1 performs oil-gas separation on the airflow flowing into the inner cavity 10.

[0056] In the above example, since the stopper 100 is the component closest to the upper end of the rotor flow hole 201, the diffusion of the airflow in the rotor flow hole 201 can be reduced by introducing the airflow in the rotor flow hole 201 into the stopper 100 for oil-gas separation, thereby improving the oil-gas separation effect of the airflow in the rotor flow hole 201 and reducing the exhaust oil content of the compressor.

[0057] In order to realize the oil-gas separation function of the oil-gas separation structure 1 on the airflow flowing into the inner cavity 10, in some embodiments, as Figure 3As shown, the aforementioned oil-gas separation structure 1 may include a first oil-gas separation component 2, and the first oil-gas separation component 2 is opposite to the inlet 106 to collide with the airflow of the inlet 106 to separate the oil and gas in the airflow.

[0058] In some embodiments, Figure 3 As shown, the aforementioned first oil-gas separator 2 has a first surface 21 opposite to the inlet 106. The first oil-gas separator 2 collides with the airflow of the inlet 106 through the first surface 21. Among them, the stopper 100 is provided with a first outlet 101, and the first outlet 101 is arranged corresponding to the first surface 21, so that the first surface 21 can guide at least part of the fluid after oil-gas separation to the first outlet 101.

[0059] In the above example, the first surface 21 of the first oil-gas separator 2 has a dual function. On the one hand, it can collide with the airflow of the first inlet port 106 to separate the oil and gas in the airflow of the first inlet port 106; on the other hand, it also has a guiding function to guide at least part of the fluid after oil-gas separation to be discharged from the first outlet port 101.

[0060] In a specific application example, the upper edge of the first outlet 101 can be flush with the first surface 21 so that the airflow after oil and gas separation can flow into the first outlet 101 along the first surface 21, thereby realizing the function of the first surface 21 being able to guide at least part of the fluid after oil and gas separation to the first outlet 101.

[0061] In some embodiments, Figure 3 As shown, the aforementioned first oil-gas separator 2 divides the inner cavity 10 into a first chamber 10a and a second chamber 10b, and the first chamber 10a has the aforementioned inlet 106. The first oil-gas separator 2 is provided with a first flow hole 23 connecting the first chamber 10a and the second chamber 10b. The oil-gas separation structure 1 also includes a second oil-gas separator 3, which is arranged in the second chamber 10b, and the second oil-gas separator 3 is used to separate oil and gas from the airflow of the first flow hole 23.

[0062] In the above example, the airflow of the rotor flow hole 201 flows into the first chamber 10a from the inlet 106 and undergoes a primary oil-gas separation with the first oil-gas separator 2; a portion of the airflow after oil-gas separation flows into the second chamber 10b from the first flow hole 23 and undergoes a secondary oil-gas separation with the second oil-gas separator 3. Due to the two times of oil-gas separation, the oil-gas separation effect of the airflow of the rotor flow hole 201 can be further improved, and the exhaust oil content of the compressor can be further reduced.

[0063] In order to realize the function of the second oil-gas separator 3 to separate the oil and gas in the airflow of the first flow hole 23, in some embodiments, the second oil-gas separator 3 is opposite to the first flow hole 23 so as to collide with the airflow of the first flow hole 23 to separate the oil and gas in the airflow.

[0064] In some embodiments, Figure 3 As shown, the aforementioned second oil-gas separator 3 has a second surface 31 opposite to the first flow hole 23. The second oil-gas separator 3 collides with the airflow of the first flow hole 23 through the second surface 31. The end surface of the first oil-gas separator 2 that faces away from the first chamber 10a is the third surface 22. Among them, in the cross section that coincides with the center line of the stopper 100, the tangent line 311 of the edge of the second surface 31 intersects with the third surface 22, so that the second surface 31 can guide at least part of the fluid after oil-gas separation to the third surface 22.

[0065] In the above example, since the second surface 31 can guide at least part of the fluid after oil-gas separation to the third surface 22, the part of the airflow guided to the third surface 22 will collide with the third surface 22 and perform oil-gas separation again, thereby further improving the oil-gas separation effect of the airflow in the rotor flow hole 201 and further reducing the exhaust oil content of the compressor.

[0066] In some embodiments, Figure 3 As shown, the aforementioned stopper 100 is further provided with a second outlet 102 , and the second outlet 102 is arranged corresponding to the third surface 22 , so that the third surface 22 can guide at least part of the fluid after oil and gas separation to the second outlet 102 .

[0067] In the above example, the third surface 22 of the first oil-gas separator 2 has a dual function. On the one hand, it can collide with the airflow to separate the oil and gas in the airflow; on the other hand, it also has a guiding function to guide at least part of the fluid after oil-gas separation to the second outlet 102 for discharge.

[0068] In a specific application example, Figure 3 As shown, the lower edge of the second outlet 102 can be flush with the third surface 22 so that the airflow after oil and gas separation can flow into the second outlet 102 along the third surface 22, thereby realizing the function of the third surface 22 being able to guide at least part of the fluid after oil and gas separation to the second outlet 102.

[0069] In some embodiments, when a first outlet port 101 is provided on the stop member 100, an oil guiding structure is provided in the aforementioned first chamber 10a, and the oil guiding structure is used to guide the oil at the bottom of the first chamber 10a to the first outlet port 101, so as to drain the oil in the first chamber 10a and prevent the oil from being deposited in the first chamber 10a.

[0070] In order to realize the functions of the above-mentioned oil guide structure, such as Figure 3 As shown, the first outlet 101 can be disposed at the upper portion of the side wall of the first chamber 10a. The lower portion 104 of the side wall of the first chamber is inclined outward from bottom to top to cooperate with the middle portion 105 of the side wall of the first chamber to form the aforementioned oil guide structure.

[0071] In the above example, when the stopper 100 rotates with the rotor core 200, the oil at the bottom of the first chamber 10a is thrown onto the side wall of the first chamber 10a under the action of centrifugal force. Since the lower portion 104 of the side wall of the first chamber is inclined outward from bottom to top, the oil at the bottom of the first chamber 10a can be guided to the middle portion 105 of the side wall of the first chamber, and then flow along the middle portion 105 of the side wall of the first chamber to the first outlet 101 under the action of centrifugal force.

[0072] It should be noted that: in a specific application example, the middle portion 105 of the side wall of the first chamber is annular and is a part of a spherical surface. The lower portion 104 of the side wall of the first chamber may be in the shape of a truncated cone, with the lower end of the truncated cone facing downward and the larger end facing upward.

[0073] In some embodiments, Figure 3 As shown, the end surface of the first oil-gas separator 2 at one end away from the first chamber 10a, i.e., the third surface 22, is in a first concave shape, and the bottom of the first concave shape has a first oil return port 20 connected to the first chamber 10a. The first oil return port 20 is used to guide at least part of the oil in the first concave shape to the first chamber 10a, and the oil flowing into the first chamber 10a flows to the first outlet 101 through the oil guide structure for discharge, so that the oil can be prevented from being deposited in the first chamber 10a and the second chamber 10b.

[0074] It should be noted here that: the aforementioned first oil-gas separator 2 can be in the shape of a cone, and the large end of the first oil-gas separator 2 faces upward, and the small end of the first oil-gas separator 2 faces downward. The small end of the first oil-gas separator 2 serves as the aforementioned first oil return port 20. Among them, the outer surface of the first oil-gas separator 2 constitutes the aforementioned first surface 21, and the inner surface of the first oil-gas separator 2 constitutes the aforementioned third surface 22. The first surface 21 and the third surface 22 are both cone-shaped surfaces. The first surface 21 in the shape of a cone has a larger contact area with the airflow in the first chamber 10a, which is beneficial to improving the oil-liquid separation effect on the airflow in the first chamber 10a.

[0075] In some embodiments, Figure 3As shown, the upper part of the second chamber 10b is provided with a third outlet 103, and the side of the second oil-gas separator 3 facing away from the first oil-gas separator 2 is opposite to the third outlet 103, and the side of the second oil-gas separator 3 facing away from the first oil-gas separator 2 is in a second concave shape 32. The bottom of the second concave shape 32 has a second oil return port 30 connected to the first chamber 10a, and the second oil return port 30 is used to guide the oil in the second concave shape 32 to the first chamber 10a. The oil flowing into the first chamber 10a flows to the first outlet 101 through the oil guide structure for discharge, so that the oil can be prevented from being deposited in the first chamber 10a and the second chamber 10b.

[0076] In order to achieve the effect of communicating the second oil return port 30 with the first chamber 10a, in some embodiments, as Figure 3 As shown, when the end face of the first oil-gas separator 2 facing away from the first chamber 10a is in a first recessed shape, and the bottom of the first recessed shape has a first oil return port 20 connected to the first chamber 10a, and the side of the second oil-gas separator 3 facing away from the first oil-gas separator 2 is in a second recessed shape 32, and the bottom of the second recessed shape 32 has a second oil return port 30 connected to the first chamber 10a, the second oil return port 30 is opposite to the first oil return port 20, so that the second oil return port 30 is connected to the first chamber 10a through the first oil return port 20.

[0077] In the above example, the oil in the second oil return port 30 drops to the first oil return port 20 under the action of gravity, and then flows into the first chamber 10 a through the first oil return port 20 .

[0078] It should be noted that in some embodiments, Figure 3 As shown, the aforementioned second oil-gas separator 3 is fixed on the first oil-liquid separator. Specifically, the second oil-gas separator 3 has a connecting portion 33, and the second oil-gas separator 3 is fixedly connected to the bottom of the first concave shape through the connecting portion 33. The aforementioned second oil return port 30 runs through the connecting portion 33. Among them, a flow port 34 is provided on the side wall of the connecting portion 33, and the interior of the aforementioned first concave shape is connected to the first oil return port 20 through the flow port 34, so that the oil inside the first concave shape can flow to the first oil return port 20 through the flow port 34, and then flow from the first oil return port 20 to the first chamber 10a.

[0079] The number of the above-mentioned first flow holes 23 can be more than two, and they are evenly arranged in the circumferential direction of the first oil-gas separator 2. The above-mentioned second oil-gas separator 3 can be annular, so that the second surface 31 of the above-mentioned second oil-gas separator 3 is an annular surface, and the above-mentioned first flow holes 23 are respectively opposite to different areas of the second surface 31.

[0080] In some embodiments, the volume of the first chamber 10a is T1, and the volume of the second chamber 10b is T2, wherein 5>T1 / T2>4.

[0081] In the above example, by making 5>T1 / T2>4, it can be ensured that there is enough space inside the first chamber 10a for oil and gas separation.

[0082] Among them, the volume of the first chamber 10a is larger than that of the second chamber 10b. The first chamber 10a has a large internal space and can fully separate most of the refrigerant oil from the airflow. The volume of the second chamber 10b is smaller, and the second chamber 10b can relieve the pressure of the first chamber 10a. At the same time, the second chamber 10b can also perform secondary oil-gas separation on the airflow to throw out the refrigerant oil remaining in the airflow. The combination of the first chamber 10a and the second chamber 10b can better collect the airflow of the rotor flow hole 201 and fully separate the oil and gas.

[0083] In some embodiments, Figure 3 As shown, the circumferential side wall of the aforementioned stopper 100 is partially solid and partially hollow in the circumferential direction, so that it can play the role of a balancing block.

[0084] In some embodiments, the aforementioned stopper 100 may be composed of a plurality of components. Figure 5 As shown, the stopper 100 may include a cover body 1a and an annular member 1b sleeved on the lower side of the cover body 1a. The annular member 1b constitutes the circumferential side wall of the stopper 100, and the inner part of the annular member 1b is partially hollow. The height H2 of the annular member 1b is designed according to the counterweight requirement.

[0085] The above-mentioned stopper 100 combines the functions of a baffle, a balancing block, and an oil stopper. The stopper 100 is in a semi-closed state, and the first cavity and the second cavity inside it can separate the oil and gas. The semi-closed structure design of the stopper 100 can better collect the airflow of the rotor circulation hole 201 and prevent the airflow of the rotor circulation hole 201 from diffusing, thereby fully separating the refrigerant oil and refrigerant in the airflow of the rotor circulation hole 201, effectively solving the problem of high oil discharge rate of the variable frequency compressor.

[0086] For ease of understanding, the working principle of the stopper 100 is described below: Figure 3As shown, after the airflow comes out of the rotor flow hole 201, it enters the first chamber 10a. The larger refrigeration oil droplets will be thrown around and gathered at the bottom of the first chamber 10a under the action of centrifugal force, and then gathered along the side wall of the first chamber 10a to be discharged from the first outlet 101. The smaller oil-gas mixture is diverted and guided by the first oil-gas separator 2. Part of the oil-gas mixture will form small refrigeration oil droplets under the obstruction of the first oil-gas separator 2, and will be gathered under the action of centrifugal force and thrown out from the first outlet 101. In order to reduce the pressure in the first chamber 10a, a first flow hole 23 is opened on the first oil-gas separator 2 to connect the first chamber 10a and the second chamber 10b. The second chamber 10b can relieve the pressure and exhaust the first chamber 10a. Most of the refrigerant gas is mainly discharged from the first chamber 10a. The second chamber 10b can perform secondary oil and gas separation on the airflow to throw out the residual refrigerant oil in the airflow, fully separate the oil and gas, and effectively solve the problem of high oil discharge rate of the variable frequency compressor.

[0087] like Figure 4-6 As shown, the present invention further provides a rotor structure, which may include any of the above-mentioned stoppers 100, and the stoppers 100 are arranged at the upper end of the rotor core 200. The stoppers 100 are used to stop the upper end of the magnet on the rotor core 200 to prevent the magnet from escaping from the upper end of the rotor core 200.

[0088] In the above example, since the rotor structure adopts the above stopper 100, the stopper 100 has a dual role. On the one hand, it can stop the upper end of the magnet on the rotor core 200, and on the other hand, it can also perform oil-gas separation on the airflow of the rotor flow hole 201. In addition, since the stopper 100 is the component closest to the upper end of the rotor flow hole 201, by introducing the airflow of the rotor flow hole 201 into the stopper 100 for oil-gas separation, the diffusion of the airflow of the rotor flow hole 201 can be reduced, thereby improving the oil-gas separation effect of the airflow of the rotor flow hole 201 and reducing the exhaust oil content of the compressor.

[0089] In some embodiments, Figure 5 As shown, the end surface of the upper end of the rotor core 200 covers the inlet 106 , and the opening of the rotor flow hole 201 at the upper end of the rotor core 200 is opposite to the inlet 106 , so that the rotor flow hole 201 is connected with the inlet 106 .

[0090] In the above example, since the end face of the upper end of the rotor core 200 covers the inlet 106 of the aforementioned inner cavity 10, the airflow of the rotor flow hole 201 can all flow into the inner cavity 10 of the stopper 100 through the inlet 106, thereby preventing the airflow of the rotor flow hole 201 from diffusing, so that the airflow of the rotor flow hole 201 can be completely separated from the oil and gas inside the stopper 100, thereby greatly improving the oil and gas separation effect of the airflow of the rotor flow hole 201.

[0091] In some embodiments, when the oil-gas separation structure 1 includes a first oil-gas separation element 2, and the first oil-gas separation element 2 separates the inner cavity 10 into a first chamber 10a and a second chamber 10b, the volume of the second chamber 10b is T2. The number of the rotor flow holes 201 is more than two, and the sum of the flow areas of the rotor flow holes 201 is S. The unit of T2 is cubic meter and the unit of S is square meter.

[0092] In the above example, the oil-gas mixture is ejected vertically from the rotor flow hole 201, and its unit flow volume is estimated as a cube, the rotor flow area is S, and with this as the base area, its equivalent cube volume is the square root of S to the cube. T2 is greater than this volume, which can ensure that there is enough volume to accommodate the gas flowing in the rotor flow hole 201 unit, and can ensure that the gas discharged from the rotor flow hole 201 is discharged smoothly.

[0093] In some embodiments, Figure 4-8 As shown, the aforementioned rotor structure further includes another stopper 300, which is disposed at the lower end of the rotor core 200. The other stopper 300 is used to stop the lower end of the magnet on the rotor core 200 to prevent the magnet from escaping from the lower end of the rotor core 200. The other stopper 300 has a second flow hole 301 penetrating both ends, and the second flow hole 301 is an expanded hole. The small end of the second flow hole 301 is opposite to the opening of the rotor flow hole 201 at the lower end of the rotor core 200, so that the second flow hole 301 is connected with the rotor flow hole 201.

[0094] In the above example, by designing the second flow hole 301 to be expanded, it has a drainage effect to help the high-pressure airflow enter the rotor flow hole more smoothly, so that the airflow is separated from the oil and liquid in the stopper 100, thereby reducing the exhaust oil content of the compressor.

[0095] In some embodiments, the circumferential side wall of the aforementioned other stopper 300 is partially solid and partially hollow in the circumferential direction, so that it can play the role of a balancing block, so that the other stopper 300 has the functions of both a baffle and a balancing block.

[0096] In some embodiments, Figure 6As shown, the aforementioned rotor structure further includes a fastener, which passes through the stopper 100, the rotor core 200 and another stopper 300 in sequence, and fixes the stopper 100, the rotor core 200 and another stopper 300. The fastener may be a rivet 4 or the like.

[0097] It should be noted here that the outer surface of the above-mentioned stopper 100 can be a hemispherical surface, the outer surface of the above-mentioned other stopper 300 can be an annular surface, and the outer surface of the other stopper 300 can be a part of a spherical surface. The stopper 100 and the other stopper 300 can cooperate to effectively reduce the airflow disturbance when the rotor rotates, effectively weaken the aerodynamic noise, reduce the compressor noise, improve the user experience, and improve the overall performance of the compressor.

[0098] Among them, the rotor structure of the present invention can improve the oil rejection effect, effectively reduce the oil content of the compressor exhaust, solve the problem of high oil content at high frequency and ultra-high speed, reduce the aerodynamic noise of the motor gas circulation, and has the advantage of simple assembly.

[0099] The rotor structure of the present invention has only one part (ie, the aforementioned stopper 100 and another stopper 300) at each end for assembly, which is simple and reliable, and improves the production efficiency of the production line.

[0100] In some embodiments, when the stopper 100 has a first outlet 101, a second outlet 102 and a third outlet 103 at the same time, the area of ​​the third outlet 103 is S1; the number of the first outlets 101 is more than two, and they are evenly arranged around the circumference of the stopper 100, and the sum of the areas of the first outlets 101 is S2; the number of the second outlets 102 is more than two, and they are evenly arranged around the circumference of the stopper 100, and the sum of the areas of the second outlets 102 is S3; the number of the rotor circulation holes 201 is more than two, and the sum of the outlet areas of the rotor circulation holes 201 is S; wherein, S1+S2+S3≥S.

[0101] In the above example, by making S1+S2+S3≥S, the air outlet area on the stopper 100 can be made greater than or equal to the air inlet area, so that the gas flowing out of the rotor flow hole can be smoothly discharged from each outlet of the stopper 100, ensuring that the internal air pressure of the stopper 100 will not increase.

[0102] The present invention also provides a motor, which includes any of the above-mentioned rotor structures. In particular, because the motor adopts the above-mentioned rotor structure, and because the stopper 100 is the component closest to the upper end of the rotor flow hole 201, by introducing the airflow of the rotor flow hole 201 into the stopper 100 for oil-gas separation, the diffusion of the airflow of the rotor flow hole 201 can be reduced, thereby improving the oil-gas separation effect of the airflow of the rotor flow hole 201 and reducing the exhaust oil content of the compressor.

[0103] The present invention also provides a compressor, which may include the motor described above. Since the compressor adopts the motor described above, and since the stopper 100 is the component closest to the upper end of the rotor flow hole 201, the diffusion of the airflow of the rotor flow hole 201 can be reduced by introducing the airflow of the rotor flow hole 201 into the stopper 100 for oil-gas separation, thereby improving the oil-gas separation effect of the airflow of the rotor flow hole 201 and reducing the exhaust oil content of the compressor.

[0104] For ease of understanding, the overall structure of the present invention is described below, and its working principle is explained.

[0105] like Figure 5 As shown, the aforementioned stopper 100 is hemispherical, and has the functions of a baffle, a balancing block, and an oil retaining plate. The maximum width D6 of the stopper 100 is less than the outer diameter D1 of the rotor core; the aforementioned inlet 106 is circular, and the diameter D7 of the inlet is greater than or equal to the maximum outer diameter D2 of the rotor flow hole; the diameter of the outer wall of the stopper 100 is D8, and D8 = D6. Among them, the hemispherical design of the stopper 100 can reduce the wind resistance of the rotor rotation, reduce airflow disturbance, and reduce aerodynamic noise.

[0106] like Figure 6 As shown, the aforementioned stopper 100, the rotor core 200 and another stopper 300 are fixed by rivets 4. The stopper 100 is provided with rivet holes for the rivets 4 to pass through, and the number and size of the rivet holes correspond to the number and size of the rivet holes on the rotor core 200. Figure 5 As shown, the aforementioned first oil-gas separator 2 divides the inner cavity 10 into a first chamber 10a and a second chamber 10b. The first oil-gas separator 2 can be in the shape of a cone, with the large end of the first oil-gas separator 2 facing upward and the small end of the first oil-gas separator 2 facing downward. The first oil-gas separator 2 is fixed to the cavity wall of the inner cavity 10 through the large end, and the distance from the connection between the large end of the first oil-gas separator 2 and the cavity wall of the inner cavity to the bottom of the stopper 100 is H3, wherein 1 / 2D8<H3<1 / 4D8, to ensure that the conical cavity volume of the first oil-gas separator 2 is large enough.

[0107] like Figure 3 As shown, the second outlet 102 is evenly distributed on the upper side of the connection between the first oil-gas separator 2 and the wall of the inner cavity 10, and the first outlet 101 is evenly distributed on the lower side. The opening area of ​​the first outlet 101 is larger than the opening area of ​​the second outlet 102. The first outlet 101 is connected to the first chamber 10a, and the second outlet 102 is connected to the second chamber 10b. A plurality of first flow holes 23 are evenly distributed in the circumferential direction in the middle of the first oil-gas separator 2, and the first flow holes 23 are connected to the first chamber 10a and the second chamber 10b.

[0108] like Figure 5 As shown, the small end of the aforementioned first oil-gas separator 2 forms the first oil return port 20. The aforementioned second oil-gas separator 3 is an annular umbrella-shaped structure, and the outer ring "umbrella edge" diameter D10 of the second oil-gas separator 3 is required to be larger than the maximum outer diameter D9 of the first flow hole 23 on the first oil-gas separator 2, to ensure that the second oil-gas separator 3 can block all the oil-gas mixture entering the second chamber 10b from the first flow hole 23, and the refrigerant oil can fully collide with the second oil-gas separator 3 and then gather, and under the centrifugal action, it will be thrown onto the cone wall of the first oil-gas separator 2 (i.e. the aforementioned third surface 22), and the refrigerant oil will gather on the third surface 22, and then be discharged from the second outlet 102. The remaining refrigerant gas is discharged from the third outlet 103 at the top. A small portion of the oil in the second chamber 10b that is not thrown out from the second outlet 102 settles to the small end of the first oil-gas separator 2, and can flow back to the first chamber 10a through the first oil return port 20, and be thrown out from the first outlet 101 through the side wall of the first chamber 10a, without causing refrigerant oil deposition.

[0109] like Figure 5 As shown, the aforementioned other stopper 300 is a semi-hollow annular structure. The end face of the other stopper 300 close to the rotor core 200 is flat, and fits with the lower end of the rotor core 200 to act as a baffle. Its main function is to block the lower end of the magnet to prevent the magnet from escaping from the lower end of the rotor core 200, and secondly to prevent the magnet fragments and impurities from flying out and affecting the operation of the motor or pump body. The maximum width D3 of the other stopper 300 is less than the outer diameter D1 of the rotor core, and cannot exceed the outer diameter of the rotor core 200 to prevent interference with the stator. The diameter D4 of the small mouth end of the second flow hole 301 of the other stopper 300 is greater than or equal to the maximum outer diameter D2 of the rotor flow hole, ensuring that the rotor flow hole is not blocked. The height H1 of the other stopper 300 depends on the weight requirement of the counterweight. The greater the weight, the higher the height, and the larger the volume of the solid part, which can meet the requirements. The outer wall of the other stopper 300 is in the shape of a truncated sphere, and its spherical diameter D5≤D3. The second flow hole 301 can be a frustum-shaped hole. The inner wall of the large-mouth end of the second flow hole 301 intersects with the outer wall of the other stopper 300, and a sharp angle is formed at the intersection. The annular structure of the other stopper 300 reduces the wind resistance of the rotor rotation and optimizes the gas path, assisting the high-pressure gas to enter the rotor flow hole more smoothly, thereby improving the overall performance of the compressor. The number and size of the rivet through holes on the other stopper 300 correspond to the number and size of the rivet through holes on the rotor core 200.

[0110] The aforementioned stopper 100 and the other stopper 300 are both integrated parts, integrating the functions of a baffle, an oil deflector cap, an oil deflector seat and a balancing block. The stopper 100, the rotor core 200 and the other stopper 300 are fixed by rivets 4, which is simple and reliable to assemble, thereby improving the production efficiency of the production line.

[0111] It is easy for those skilled in the art to understand that, without conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0112] The above description is only 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 principle of the present invention shall be included in the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present invention. These improvements and variations should also be regarded as the protection scope of the present invention.

Claims

1. A stopper (100) for stopping the upper end of a magnet on a rotor core (200), characterized in that: The stopper (100) comprises an inner cavity (10) and an oil-gas separation structure (1) arranged in the inner cavity (10); the inner cavity (10) comprises an inlet (106); the inner cavity (10) is connected to a rotor flow hole (201) on the rotor core (200) through the inlet (106), so that the airflow in the rotor flow hole (201) flows into the inner cavity (10) through the inlet (106); The stopper (100) is used to drive the oil-gas separation structure (1) to rotate under the drive of the rotor core (200), so that the oil-gas separation structure (1) can separate oil and gas from the airflow flowing into the inner cavity (10).

2. The stopper (100) according to claim 1, characterized in that: The oil-gas separation structure (1) comprises a first oil-gas separation component (2), wherein the first oil-gas separation component (2) is opposite to the inlet (106) so as to collide with the airflow of the inlet (106) to separate the oil and gas in the airflow.

3. The stopper (100) according to claim 2, characterized in that: The first oil-gas separation element (2) has a first surface (21) opposite to the inlet (106), and the first oil-gas separation element (2) collides with the airflow of the inlet (106) through the first surface (21); The stopper (100) is provided with a first outlet (101), and the first outlet (101) is arranged corresponding to the first surface (21), so that the first surface (21) can guide at least part of the fluid after oil and gas separation to the first outlet (101).

4. The stopper (100) according to claim 2 or 3, characterized in that: The first oil-gas separation component (2) divides the inner cavity (10) into a first chamber (10a) and a second chamber (10b), and the first chamber (10a) has the inlet (106); the first oil-gas separation component (2) is provided with a first flow hole (23) communicating with the first chamber (10a) and the second chamber (10b); The oil-gas separation structure (1) further comprises a second oil-gas separation component (3), wherein the second oil-gas separation component (3) is arranged in the second chamber (10b), and the second oil-gas separation component (3) is used to separate oil and gas from the airflow of the first flow hole (23).

5. The stopper (100) according to claim 4, characterized in that: The second oil-gas separation element (3) is opposite to the first flow hole (23) so as to collide with the airflow of the first flow hole (23) to separate the oil and gas in the airflow.

6. The stopper (100) according to claim 5, characterized in that: The second oil-gas separator (3) has a second surface (31) opposite to the first flow hole (23), and the second oil-gas separator (3) collides with the airflow of the first flow hole (23) through the second surface (31); the end surface of the first oil-gas separator (2) facing away from the first chamber (10a) is a third surface (22); In which, in a cross section coinciding with the center line of the stopper (100), a tangent line (311) of an edge of the second surface (31) intersects with the third surface (22), so that the second surface (31) can guide at least part of the fluid after oil and gas separation to the third surface (22).

7. The stopper (100) according to claim 6, characterized in that: The stopper (100) is also provided with a second outlet (102), and the second outlet (102) is arranged corresponding to the third surface (22), so that the third surface (22) can guide at least part of the fluid after oil and gas separation to the second outlet (102).

8. The stopper (100) according to claim 4, characterized in that: When the stopper (100) is provided with a first outlet (101), an oil guide structure is provided in the first chamber (10a), and the oil guide structure is used to guide the oil at the bottom of the first chamber (10a) to the first outlet (101).

9. The stopper (100) according to claim 8, characterized in that: The first outlet (101) is arranged at the upper part of the side wall of the first chamber (10a), and the lower part (104) of the side wall of the first chamber (10a) is inclined outward from bottom to top to cooperate with the middle part (105) of the side wall of the first chamber (10a) to form the oil guide structure.

10. The stopper (100) according to claim 8 or 9, characterized in that: The end surface of the first oil-gas separation element (2) facing away from the first chamber (10a) is in a first concave shape, and the bottom of the first concave shape has a first oil return port (20) communicating with the first chamber (10a); And / or, a third outlet (103) is provided at the upper portion of the second chamber (10b), a side of the second oil-gas separator (3) facing away from the first oil-gas separator (2) is opposite to the third outlet (103), and a side of the second oil-gas separator (3) facing away from the first oil-gas separator (2) is in a second concave shape (32), and a bottom of the second concave shape (32) has a second oil return port (30) connected to the first chamber (10a).

11. The stopper (100) according to claim 10, characterized in that: When the end surface of the first oil-gas separator (2) facing away from the first chamber (10a) is in a first concave shape, and the bottom of the first concave shape has a first oil return port (20) connected to the first chamber (10a), and the side of the second oil-gas separator (3) facing away from the first oil-gas separator (2) is in a second concave shape (32), and the bottom of the second concave shape (32) has a second oil return port (30) connected to the first chamber (10a), the second oil return port (30) is opposite to the first oil return port (20), so that the second oil return port (30) is connected to the first chamber (10a) through the first oil return port (20).

12. The stopper (100) according to claim 4, characterized in that: The volume of the first chamber (10a) is T1, and the volume of the second chamber (10b) is T2, wherein 5>T1 / T2>4.

13. The stopper (100) according to any one of claims 1-3 and 5-12, characterized in that: The circumferential side wall of the stopper (100) is partially solid and partially hollow in the circumferential direction.

14. A rotor structure, characterized in that: It comprises the stopper (100) according to any one of claims 1 to 13, wherein the stopper (100) is arranged at the upper end of the rotor core (200).

15. The rotor structure according to claim 14, characterized in that: The end surface of the upper end of the rotor core (200) covers the inlet (106), and the opening of the rotor circulation hole (201) at the upper end of the rotor core (200) is opposite to the inlet (106), so that the rotor circulation hole (201) is connected to the inlet (106).

16. The rotor structure according to claim 14 or 15, characterized in that: When the oil-gas separation structure (1) comprises a first oil-gas separation component (2), and the first oil-gas separation component (2) separates the inner cavity (10) into a first chamber (10a) and a second chamber (10b), the volume of the second chamber (10b) is T2; The number of the rotor circulation holes (201) is more than two, and the sum of the circulation areas of the rotor circulation holes (201) is S; wherein, The unit of T2 is cubic meter and the unit of S is square meter.

17. The rotor structure according to claim 14 or 15, characterized in that: It also includes another stopper (300), the other stopper (300) being arranged at the lower end of the rotor core (200), the other stopper (300) being used to stop the lower end of the magnet on the rotor core (200); The other stopper (300) has a second flow hole (301) passing through both ends, the second flow hole (301) is an expanded hole, and the small end of the second flow hole (301) is opposite to the opening of the rotor flow hole (201) at the lower end of the rotor core (200), so that the second flow hole (301) is connected with the rotor flow hole (201).

18. The rotor structure according to claim 17, characterized in that: The circumferential side wall of the other stopper (300) is partially solid and partially hollow in the circumferential direction.

19. The rotor structure according to claim 14, 15 or 18, characterized in that: When the stopper (100) has a first outlet (101), a second outlet (102) and a third outlet (103) at the same time, the area of ​​the third outlet (103) is S1; the number of the first outlets (101) is more than two, and they are evenly arranged around the circumference of the stopper (100), and the sum of the areas of the first outlets (101) is S2; the number of the second outlets (102) is more than two, and they are evenly arranged around the circumference of the stopper (100), and the sum of the areas of the second outlets (102) is S3; the number of the rotor circulation holes (201) is more than two, and the sum of the outlet areas of the rotor circulation holes (201) is S; wherein S1+S2+S3≥S.

20. A motor, characterized in that: A rotor structure comprising any one of claims 14-19.

21. A compressor, characterized in that: Comprising the motor as claimed in claim 20.

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