CN111927782A

CN111927782A - Motor rotor, rotary compressor and air conditioner

Info

Publication number: CN111927782A
Application number: CN202010845633.8A
Authority: CN
Inventors: 魏会军; 吴健; 王珺; 张心爱; 闫鹏举; 张大鹏
Original assignee: Gree Green Refrigeration Technology Center Co Ltd of Zhuhai
Current assignee: Gree Green Refrigeration Technology Center Co Ltd of Zhuhai; Zhuhai Gree Energy Saving Environmental Protection Refrigeration Technology Research Center Co Ltd
Priority date: 2020-08-20
Filing date: 2020-08-20
Publication date: 2020-11-13

Abstract

The invention discloses a motor rotor and a rotary compressor, and belongs to the technical field of compressors. The motor rotor comprises a first end face and a second end face, the motor rotor comprises a circulation hole, the motor rotor rotates in a first direction, two ends of the circulation hole penetrate through the first end face and the second end face respectively, the circulation hole is deviated in a second direction in the direction towards the second end face, and the second direction is opposite to the first direction. The motor rotor can obviously reduce the noise generated in operation.

Description

Motor rotor, rotary compressor and air conditioner

Technical Field

The invention relates to the technical field of compressors, in particular to a motor rotor, a rotary compressor and an air conditioner.

Background

The conventional rolling rotor compressor mainly comprises a shell assembly, an upper cover, a lower cover, a pump body assembly, a motor assembly, a liquid distributor component and the like. The casing subassembly forms airtight type structure with the cooperation of upper and lower cover, and the casing is inside mainly to be become by two parts of pump body subassembly and motor element, and pump body subassembly includes cylinder, roller, crank, gleitbretter, upper and lower bearing assembly, and each spare part is mutually supported and is formed inclosed suction pump air cavity, and motor element then includes stator module and rotor subassembly. The rotary compressor generates driving force to the crank of the pump body through the action of electromagnetic force generated between the motor rotor component and the stator component, and under the action of crank rotation driving, the volume of a suction pump air cavity of the compressor is continuously changed by utilizing a crank eccentric part structure, so that the periodic air suction, compression and exhaust processes of the compressor are realized. Aiming at the rare earth motor which is commonly applied in the industry at present, a motor rotor is formed by overlapping and assembling a plurality of punching sheets, a plurality of axially through circulation holes (formed by overlapping the punched holes on each punching sheet) are usually arranged on the rotor, and gas exhausted from a pump body cavity enters a motor lower cavity space, mainly enters a motor upper cavity through the rotor circulation holes and then enters an air conditioning system.

The conventional compressor rotor circulation hole structure is usually designed to be axially and vertically communicated, in the actual operation of the compressor, the rotor rotates in the circumferential direction, and the flowing direction of gas passing through the rotor circulation hole is vertically upward along the flow through hole. Therefore, high-pressure gas discharged by the pump body of the compressor is transversely impacted by high-speed flowing gas when flowing through the rotor circulation hole, so that high pneumatic noise is caused, and meanwhile, the motor rotor is transversely impacted by the high-speed flowing gas when rotating in the circumferential direction, so that high pneumatic wind resistance is caused. Especially under the heavy operating mode of high frequency, the inside gas flow velocity of compressor housing is great, and this kind of phenomenon is more serious, and noise compressor energy consumption rises by a wide margin, and pneumatic noise risees by a wide margin to be unfavorable for the efficiency of the compressor and fall the noise. In recent years, with the trend of miniaturization development of compressors, if the miniaturized compressors reach the same capacity, the operating frequency of the miniaturized compressors needs to be greatly increased, the influence of a rotor circulation structure on the noise performance of the miniaturized compressors is more prominent, and the miniaturized compressors become a difficult problem that the design process of the rotor compressors needs to be optimized and improved.

Disclosure of Invention

In order to overcome the defects in the prior art, embodiments of the present invention provide a motor rotor and a rotary compressor, which can significantly reduce noise generated during the operation of the motor rotor and the rotary compressor.

In order to achieve the above object, in a first aspect, an embodiment of the present invention provides a motor rotor applied to a rotary compressor, the motor rotor includes a first end surface and a second end surface, the motor rotor includes a flow hole, the motor rotor rotates in a first direction, two ends of the flow hole respectively penetrate through the first end surface and the second end surface, the flow hole is offset in a second direction in a direction toward the second end surface, and the second direction is opposite to the first direction.

Optionally, the distance from the center of the flow hole at any position to the rotation axis of the motor rotor on the same section is equal.

Optionally, the flow hole has a spiral structure, and the spiral direction of the spiral structure is the second direction.

Optionally, the lead of the flow hole is equal to or greater than the linear distance from the first end face to the second end face.

Optionally, an inclination slope of the flow hole is greater than or equal to 0.5 and less than or equal to 15, where the inclination slope is a ratio of a rotation angle of the flow hole to a linear distance from the first end surface to the second end surface, the rotation angle is an included angle between a center of a projection of an inlet and an outlet of the flow hole on the horizontal plane and a line connecting centers of circle centers of the center circle lines, respectively, the inlet is a portion of the flow hole on the first end surface, and the outlet is a portion of the flow hole on the second end surface.

Optionally, the circulation holes are horizontally projected on the same central circular line, and the sum of the rotation angles of the circulation holes is less than or equal to 360 degrees; wherein the content of the first and second substances,

the central circular line is a circular line determined by taking a projection point of the rotating axis of the motor rotor on a horizontal plane as a center,

the rotation angle is an included angle between a connecting line of centers of projections of an inlet and an outlet of the circulation hole on the horizontal plane and a circle center of the central circular line, the inlet is a part of the circulation hole on the first end face, and the outlet is a part of the circulation hole on the second end face.

Optionally, the projections of any two of the flow holes on the horizontal plane do not intersect with each other.

Optionally, a plurality of the circulation holes with horizontal projections on different central circular lines are included, and the sum of the maximum radial widths of the circulation holes on two different central circular lines is smaller than the difference of the diameters of two different central circular lines; wherein the content of the first and second substances,

the central circular line is a circular line determined by taking a projection point of the rotation axis of the motor rotor on a horizontal plane as a center.

Optionally, a weight is disposed on the first end surface and/or the second end surface.

In a second aspect, embodiments of the present invention further provide a rotary compressor, including the motor rotor as described above.

In a third aspect, an embodiment of the present invention further provides an air conditioner, including the motor rotor as described above.

The invention has the beneficial effects that:

the invention provides a motor rotor, which is applied to a rotary compressor and comprises a first end surface and a second end surface, wherein the motor rotor comprises a circulation hole, the motor rotor rotates in a first direction, two ends of the circulation hole respectively penetrate through the first end surface and the second end surface, the circulation hole is deviated in a second direction in the direction towards the second end surface, and the second direction is opposite to the first direction. The motor rotor reduces the flow wind resistance of air flow and reduces air flow disturbance, thereby realizing the obvious effect of improving efficiency and reducing noise.

Drawings

The advantages of the above and/or additional aspects of the present invention will become apparent and readily appreciated from the following description of the embodiments taken in conjunction with the accompanying drawings of which:

fig. 1 is an assembly structure view of a rotary compressor;

FIG. 2 is a schematic structural view of a rotor of a prior art electric machine;

FIG. 3 is a schematic end view of the structure of FIG. 2;

FIG. 4 is a schematic structural diagram of a rotor of an electric machine according to an embodiment of the present invention;

FIG. 5 is an end perspective view of the embodiment of FIG. 4;

FIG. 6 is a schematic end view of the embodiment of FIG. 4;

FIG. 7 is an end perspective view of a rotor of an electric machine according to one embodiment of the present invention;

fig. 8 is a schematic end view of a rotor of an electric machine according to another embodiment of the present invention.

Wherein the correspondence between the reference numbers and the names of the components in fig. 1 to 8 is:

1. a liquid separating member; 2. a pump body assembly; 3. a motor assembly; 4. an exhaust component; 5. a first chamber; 6. a second chamber; (ii) a 7. A housing assembly; 20. an exhaust chamber; 21. a first flange; 22. a second flange; 23. a crank; 24. a cylinder; 25. a valve plate; 30. a motor rotor; 31. a motor stator; 70; a main housing; 71. an upper housing; 72. a lower housing; 301. a first end face; 302. a second end face; 303. a counterbalance; 310. a flow-through hole; 311. an inlet; 312. and (7) an outlet.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments of the present invention and features of the embodiments may be combined with each other without conflict.

Fig. 1 shows an assembly structure diagram of a rotary compressor, fig. 2 shows a structure diagram of a rotor of a motor in the related art, and fig. 3 shows an end surface structure diagram of fig. 2. It should be noted that in the example shown in fig. 1, the motor rotor is a structure of a motor rotor in the prior art, and the structure of the rotary compressor shown in fig. 1 is not limited to the prior art.

As shown in fig. 1, the rotary compressor mainly includes a liquid separating member 1, a pump body assembly 2, and a motor assembly 3. The motor assembly 3 mainly includes a motor rotor 30 and a motor stator 31. Wherein divide liquid part 1 and pump body subassembly 2 to link to each other, divide liquid part 1 and provide gas for pump body subassembly 2, pump body subassembly 2 provides power for the gas flow, makes gas flow towards the direction of predetermineeing. As shown in fig. 2, a flow hole 310 is provided in the motor rotor of the related art, and the flow hole 310 penetrates the first end surface 301 and the second end surface 302 of the motor rotor 30 along the axial direction of the motor rotor 30. Referring to fig. 1 to 3, when the motor rotor 30 does not rotate or has a relatively slow rotation speed, the air flow provided by the pump body assembly 2 flows along the flow hole 300 and is discharged when passing through the motor rotor 30, the gas outflow direction is parallel to the axial direction of the motor rotor 30, and in actual operation, the motor rotor 30 is in a high-speed rotation state, and the high-pressure gas discharged by the pump body assembly 2 is disturbed by the high-speed rotation of the motor rotor 30 when passing through the flow hole 310 of the motor rotor 30, which causes a relatively large aerodynamic noise, and meanwhile, the flow speed of the gas flowing at a high speed when the motor rotor 30 rotates in the circumferential direction is relatively high, which is more serious, and causes a significant increase in compressor energy consumption and a significant increase in aerodynamic noise.

To this end, as shown in fig. 4, an embodiment of the present invention provides a motor rotor applied to a rotary compressor, the motor rotor rotates in a first direction R during operation, a flow hole 310 is provided in the motor rotor 30, one end of the flow hole 310 penetrates a first end surface 301 of the motor rotor 30 to form an inlet 311, the other end of the flow hole 310 penetrates a second end surface 302 of the motor rotor 30 to form an outlet 312, the flow hole 310 is offset in a direction toward the second end surface in a direction from the first end surface 301 to the second end surface 302 of the motor rotor 30, and the second direction is opposite to the first direction to meet a rotation direction of the motor rotor 30.

It will be appreciated that the flow openings 310 therein may also be considered to form an outlet 312 that is deflected in a direction opposite the first direction R, and that the outlet 312 of the flow opening 310 may be considered to be offset a distance in a circumferential direction opposite the first direction R, since the first direction R may be considered to be in a circumferential direction. When the high-speed air flow pump works, the motor rotor 30 rotates at a high speed in the first direction R, high-pressure air flow pumped in through the pump body assembly 2 flows into the circulation hole 310 through the inlet 311 of the motor rotor 30 and finally flows out through the outlet 312, when the air flow flows along the circulation hole 310, the air flow has a flow component in the direction opposite to the first direction R of the motor rotor 30, so that the influence of the high-speed rotation of the motor rotor 30 on the air flow can be counteracted, the circulation area of the circulation hole 310 is greatly increased, the flow wind resistance is greatly reduced, the air flow disturbance is reduced, and the effect improvement and the noise reduction are realized.

Further illustratively, the distances from the center of any position of the flow holes 310 to the rotation circumferential direction of the motor rotor 30 on the same cross section are equal. At this time, it may be considered that the offset of the flow holes 310 is mainly opposite to the first direction R.

In a specific embodiment, the flow holes 310 are helical structures, and the helical direction of the flow holes 310 is opposite to the first direction R in a direction from the first end face 301 to the second end face 302 of the motor rotor 30. In this embodiment, the circulation hole 310 is a spiral-up structure having a direction opposite to the first direction R, so that the airflow direction in the circulation hole 310 spirally rises in response to the first direction R of the motor rotor 30, thereby greatly weakening the lateral impact force of the airflow on the motor rotor 30, reducing the flow wind resistance, and reducing the disturbance of the rotation of the motor rotor 30 on the circulation airflow, thereby significantly reducing the power consumption during the operation of the compressor, reducing the airflow pulsation in the compressor, and reducing the aerodynamic noise.

Further exemplarily, the height of the motor rotor 30 is H (i.e. the linear distance between the first end surface 301 and the second end surface 302 is H), and the lead of the flow hole 310 is S, preferably S ≧ H. It will be appreciated that when S ≧ H, each portion of the flow-through hole 310 is in a direction opposite the first direction R of the motor rotor 30 over the entire height of the motor rotor 30. If S < H, the flow hole 310 portion is the same as the first direction R of the motor rotor 30, and the effect of reducing noise in the present invention is reduced to some extent. The height of the motor rotor 30 and the lead of the circulation hole 310 are restricted to ensure that the number of spiral turns of the circulation hole 310 is less than one circle, so that the occupied space can be limited on the axial space while the motor rotor is easy to process and realize, the design of a plurality of spiral circulation holes 310 is facilitated, the total circulation area of the circulation hole 310 is increased, high-pressure airflow accumulated in the lower cavity of the motor can quickly and smoothly flow to the upper cavity of the motor through the circulation hole 310 to be discharged out of a compressor and then enters an air conditioning system, airflow pulsation of the upper cavity of the motor and the lower cavity of the motor and the circulation hole 310 is greatly slowed down, and the pneumatic noise of the compressor is reduced while the flow resistance of the.

In this embodiment, the flow holes 310 are in a continuous spiral structure, and it should be noted that in different embodiments, the flow holes 310 can be selected to be in other different structures, such as: the flow holes 310 are linear structures, curved structures, etc. gradually extending in the direction opposite to the first direction R from the first end surface 301 to the second end surface 302 of the motor rotor 30, and of course, the flow holes 310 may be set to be a combination of different structures, which are all within the protection scope of the present invention.

In an optional embodiment, an inclination slope of the flow holes 310 is greater than or equal to 0.5 and less than or equal to 15, where the inclination slope is a ratio of a rotation angle θ of the flow holes 310 to a linear distance from the first end surface 301 to the second end surface 302, and the rotation angle θ is an included angle between a connecting line of centers of projections of the inlet 311 and the outlet 312 of the flow holes 310 on the horizontal plane and a center of the central circular line. By adopting the range of the inclination slope of the flow through hole 310 in the embodiment, the lateral impact generated between the airflow in the flow through hole 310 and the high-speed rotation of the motor rotor 30 can be effectively reduced, the wind resistance of the airflow can be reduced, and the noise can be reduced.

Further exemplarily, as shown in fig. 5, in a specific embodiment, a plurality of flow holes 310 are disposed in the motor rotor 30, projections of trajectories of the plurality of flow holes 310 on a horizontal plane are located on a same central circular line, and a sum of rotation angles of the plurality of flow holes 310 is equal to or less than 360 degrees. Wherein, the central circular line is a circular line determined by taking the projection point of the rotation axis of the motor rotor 30 on the horizontal plane as the center; the rotation angle is an included angle between a connection line of centers of projections of the inlet 311 and the outlet 312 of the flow hole 310 on a horizontal plane and a center of the center circle line, and it should be noted that, for convenience of description, the horizontal plane is a reference plane parallel to the first end surface 301 and the second end surface 302 of the motor rotor 30.

Specifically, as shown in fig. 5, the motor rotor 30 includes a plurality of flow holes 310 whose projections on the horizontal plane are located on the same central circular line, where, for example, any one of the flow holes 310 is taken as an example, L1 is a connecting line between a center point of a projection of the inlet 311 of the flow hole 310 on the horizontal plane and a center O of the central circular line, L2 is a connecting line between a center point of a projection of the outlet 312 of the flow hole 310 on the horizontal plane and the center O of the central circular line, and the rotation included angle θ is an included angle between L1 and L2, in this embodiment, on the central circular line, there are N flow holes 310, that is, N θ is not more than 360 degrees. In this embodiment, when the circulation hole 310 is machined on the motor rotor 30, the position crossing of different punching sheets can be avoided, so as to reduce the identification difficulty of machining and assembling to a greater extent. In a preferred embodiment, the sum of the rotation angles of the plurality of flow holes 310 on the same central circular line is equal to 360 degrees.

Further, any two flow holes 310 do not intersect with each other in the plurality of flow holes 310 defined by the same central circular line. So as to avoid mutual interference between the flow holes 310 and reduce the difficulty of processing.

Further exemplarily, as shown in fig. 6, a plurality of flow holes 310 are disposed in the motor rotor 30, and projections of trajectories of the plurality of flow holes 310 on a horizontal plane are located on different central circular lines, which are circular lines defined by taking a projection point of a rotation axis of the motor rotor 30 on the horizontal plane as a center, wherein a sum of maximum radial widths of the flow holes 310 located on two different central circular lines is smaller than or equal to a difference between diameters of the two different central circular lines.

In particular, the above-mentioned multiple circulationThe diameters of the central circular lines projected on the horizontal plane by the locus of the hole 310 are d1, d2 … … and d_k(k.gtoreq.2). First, a case where k is 2 is taken as an example, and as shown in fig. 6, diameters of two adjacent center circle lines are set to d_n、d_n-1The maximum values of the widths of the flow holes 310 in the radial direction, which are centered on the adjacent two center circular lines, are D_n、D_n-1Then D is_n+D_n-1<d_n-d_n-1. In this principle, when there are a plurality of center circular lines defined by the plurality of flow holes 310, it is necessary to satisfy that the sum of the maximum radial widths of any two flow holes 310 is equal to or less than the difference between the diameters of the center circular lines corresponding to the two flow holes 310. Therefore, the risk that the plurality of circulation holes 310 which are distributed along different central circular lines in projection interfere with each other and are communicated with each other can be reduced, the processing and assembling process of the motor rotor 30 is simplified, the structural strength of the motor rotor 30 is improved, noise is reduced, and vibration is reduced. Of course, the flow holes 310 are usually formed by one standard punching, and the radial lengths thereof are equal to each other over the entire locus of the flow holes 310, and therefore, the sum of the radial lengths of any two flow holes 310 may be considered to be equal to or smaller than the difference between the diameters of the center circular lines corresponding to the two flow holes 310.

It should be noted that, in the embodiment of the present invention, a plurality of flow holes 310 are disposed in the motor rotor 30, and the plurality of flow holes 310 may be selected to satisfy: the flow hole comprises a plurality of flow holes 310, projections of the tracks on a horizontal plane are positioned on the same central circular line, and the sum of the rotation angles of the plurality of flow holes 310 is less than or equal to 360 degrees; and a plurality of flow holes 310 with the projection of the locus on the horizontal plane on different central circular lines are included, wherein the sum of the maximum radial widths of the flow holes 310 on any two different central circular lines is less than or equal to the difference of the diameters of the two different central circular lines.

In the example of fig. 4 to 6, the cross-sectional shape of the flow holes 310 is circular. It is to be noted that the cross-sectional shape of the flow holes 310 in the embodiment of the present invention is not limited to a circular shape, and in different embodiments, the cross-sectional shape of the flow holes 310 may be selected to be other different shapes, such as: as in the example of fig. 7, the cross-sectional shape of the flow holes 310 may be selected from a kidney-shaped hole and a D-shaped hole, and fig. 7 does not show all the other shapes, and alternatively, the cross-sectional shape of the flow holes 310 may be selected from a regular shape such as a fan shape or an oval shape, and of course, the cross-sectional shape of the flow holes 310 may be selected from an irregular shape, which is within the scope of the present invention.

In addition, in the example of fig. 4 to 6, the plurality of flow holes 310 are provided in the motor rotor 30 in the same standard form, or, within a range determined by the same central circular line, the corresponding flow holes 310 are provided in the same standard form, and there is an adaptive change in the flow holes 310 corresponding to different central circular lines. However, in different embodiments, even within the range defined by the same central circular line, the plurality of flow holes 310 may be arranged in different standard forms, as in the example of fig. 8, and the projection of the trajectories of the plurality of flow holes 310 on the horizontal plane within the range defined by the same central circular line may be selected to be different, without departing from the concept of the present invention, and it is within the protection scope of the present invention.

In an alternative embodiment, in combination with fig. 1, a balance weight 303 may be optionally disposed on the first end surface 301 and/or the second end surface 302 of the motor rotor 30, so as to adjust the rotation center of the motor rotor 30 through the balance weight 303, thereby ensuring that the motor rotor 30 rotates smoothly. In a specific embodiment, the balance weights 303 may be selectively disposed on the first end surface 301 and the second end surface 302 of the motor rotor 30, one of the balance weights 303 is selected as a main balance weight, the other balance weight 303 is selected as a secondary balance weight, the motor rotor 30 is primarily adjusted through the main balance weight, and the motor rotor 30 is finely adjusted through the secondary balance weight.

As shown in table one, the noise data of the case of using the conventional motor rotor and the motor rotor using the embodiment of the present invention are listed, respectively.

Watch 1

As shown in table one, the applicant has conducted the noise data of the rotary compressor in the case of using the conventional motor rotor and the motor rotor according to the preferred embodiment of the present invention, respectively. In the embodiment, the working condition frequency is selected as a national standard 90Hz high-frequency working condition, compared with a conventional motor rotor, under the condition that the motor rotor provided by the optimal embodiment of the invention is adopted, the energy efficiency COP is improved by 1.49%, from the viewpoint of noise frequency spectrum, the frequency band is mainly optimized to be 1 KHz-3 KHz, the total value of full-band noise is reduced by 1.3dBA, the total value of noise within 1KHz is reduced by 0.3dBA, and the noise within 2KHz is reduced by 2.5 dBA.

Based on the above technical solution of the motor rotor, an embodiment of the present invention further provides a rotary compressor, which includes the motor rotor as described above. Compared with the traditional rotary compressor, the rotary compressor provided by the embodiment of the invention can obviously reduce the noise of the rotary compressor and improve the energy efficiency of equipment.

In an alternative embodiment, referring to fig. 1, the rotary compressor of the embodiment of the present invention mainly includes a liquid separation component 1, a pump body component 2, a motor component 3, and a gas discharge component 4. The pump body assembly 2 is connected with the liquid separating component 1, the pump body assembly 2 comprises a pump air cavity 20, the motor assembly 3 comprises a motor rotor 30 and a motor stator 31, the motor stator 31 is fixedly arranged, the motor rotor 30 can rotate relative to the motor stator 31, in the embodiment, the motor rotor 30 adopts the motor rotor, an inlet 311 of the motor rotor 30 is connected with the pump air cavity 20, and the exhaust component 4 is connected with an outlet 312 of the motor rotor 30. In operation, gas firstly passes through the liquid separation component 1 for liquid separation treatment and then is supplied to the pump body assembly 2, the pump body assembly 2 pumps the gas out of the pump gas cavity 20 to form high-pressure gas flow, and the high-pressure gas flow passes through the flow hole 310 and then is discharged through the exhaust component 4. In this embodiment, the motor rotor 30 adopts the above-mentioned structure of the flow holes 310, so that the noise generated by the operation of the rotary compressor is significantly reduced, and the energy efficiency of the device is improved.

In the embodiment of the present invention, the rotary compressor further includes a first chamber 5 and a second chamber 6, the first chamber 5 is disposed between the pumping chamber 20 and the inlet 311 of the motor rotor 30, and the second chamber 6 is disposed between the pumping chamber 20 and the exhaust component 4.

Further exemplarily, as shown in fig. 1, the rotary compressor includes a housing assembly 7, the pump body assembly 2 and the motor assembly 3 are disposed in the housing assembly 7, and a suction and exhaust cavity is formed between the housing assembly 7 and the pump body assembly 2 and between the housing assembly 7 and the motor assembly 3, and the suction and exhaust cavity includes the first cavity 5 and the second cavity 6. The housing assembly 7 includes a main housing 70 with openings at two ends, and an upper housing 71 and a lower housing 72 covering the openings at two ends of the main housing 70, the upper housing 71 and the lower housing 72 are detachable so as to replace the components in the housing assembly 7, the upper housing 71 is provided with an exhaust component 4, and the exhaust component 4 can be selected as an opening formed on the upper housing 71. In an alternative embodiment, the exhaust component 4 may be selected to be connected to an air conditioning system.

The pump body assembly 2 comprises a first flange 21, a second flange 22, a crank 23 and a cylinder 24, the first flange 21 and the second flange 22 are arranged oppositely, the crank 23 is arranged between the first flange 21 and the second flange 22, the crank 23 is positioned through the first flange 21 and the second flange 22, the cylinder 24 is covered outside the crank 23, the pump air cavity 20 is arranged between the cylinder 24 and the crank 23 and is positioned on one side of the crank 23, the crank 23 is arranged on the axis of the shell assembly 7, and when the crank 23 works, the axis of the shell assembly 7 is used as a rotation center line to perform eccentric rotation, so that the pump air cavity 20 can periodically suck air and exhaust air. Optionally, a valve plate 25 is disposed at an air outlet of the air discharge cavity 20, and the valve plate 25 may be a one-way valve plate, that is, when the air discharge cavity 20 discharges air to the first chamber 20, the valve plate 25 is opened, and when the air discharge cavity 20 sucks air from the liquid separation part 1, the valve plate 25 is closed. In an alternative embodiment, the movement of the crank 23 is driven by the motor rotor 30, for example, the motor rotor 30 generates an electromagnetic force when rotating, and the electromagnetic force acts on the crank 23 to drive the crank 23 to rotate.

The embodiment of the invention also provides an air conditioner which comprises the motor rotor.

In the description of the present invention, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the communication may be direct, indirect via an intermediate medium, or internal to both elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. The motor rotor is characterized by comprising a first end face and a second end face, the motor rotor comprises a circulation hole, the motor rotor rotates in a first direction, two ends of the circulation hole penetrate through the first end face and the second end face respectively, the circulation hole is deviated in a second direction in the direction towards the second end face, and the second direction is opposite to the first direction.

2. The motor rotor as claimed in claim 1, wherein the distance from the center point of the flow hole at any position to the rotation axis of the motor rotor on the same cross section is equal.

3. The electric machine rotor as recited in claim 2, wherein the flow holes are helical structures, a direction of the helix of the helical structures being the second direction.

4. The electric machine rotor of claim 3, wherein the lead of the flow holes is equal to or greater than the linear distance from the first end face to the second end face.

5. The motor rotor according to claim 2, wherein an inclination slope of the circulation hole is 0.5 or more and 15 or less, wherein the inclination slope is a ratio of a rotation angle of the circulation hole to a linear distance from the first end surface to the second end surface, the rotation angle is an included angle between a connection line of centers of projections of an inlet and an outlet of the circulation hole on the horizontal plane, respectively, and a center of the center circle line, the inlet is a portion of the circulation hole on the first end surface, and the outlet is a portion of the circulation hole on the second end surface.

6. The motor rotor as claimed in any one of claims 1 to 5, comprising a plurality of the circulation holes horizontally projected on the same central circular line, wherein the sum of the rotation angles of the plurality of the circulation holes is 360 degrees or less; wherein the content of the first and second substances,

7. The electric machine rotor of claim 6, wherein projections of any two of the flow holes on a horizontal plane do not intersect each other.

8. An electric machine rotor according to any of claims 1-5, characterized in that it comprises a plurality of said flow openings with horizontal projections on different central circular lines, the sum of the maximum radial widths of the flow openings on two different central circular lines being smaller than the difference between the diameters of two different central circular lines; wherein the content of the first and second substances,

9. An electric machine rotor as claimed in claim 1, wherein a weight is provided on the first end face and/or the second end face.

10. A rotary compressor, characterized by comprising an electric machine rotor as claimed in any one of claims 1 to 9.

11. An air conditioner characterized by comprising an electric machine rotor according to any one of claims 1 to 9.