WO2018035732A1

WO2018035732A1 - Motor rotor for use in compressor, motor for use in compressor, and compressor

Info

Publication number: WO2018035732A1
Application number: PCT/CN2016/096478
Authority: WO
Inventors: 坂柳智司; 张巍; 王玲
Original assignee: 广东美芝制冷设备有限公司
Priority date: 2016-08-24
Filing date: 2016-08-24
Publication date: 2018-03-01

Abstract

A motor rotor (1) for use in a compressor, a motor for use in the compressor, and the compressor. The motor rotor (1) for use in the compressor comprises a rotor iron core (100) and at least one counterbalancing block (200). The rotor iron core (100) is provided in the axial direction thereof with a compressing extremity and a decompressing extremity. The counterbalancing block (200) comprises a mount part (210) and a counterbalancing part (220). The mount part (210) is mounted on at least one end surface of the compressing extremity and the decompressing extremity of the rotor iron core (100). The counterbalancing part (220) is connected to the surface of the mount part (210) facing away from the end surface and extends in the circumferential direction of the rotor iron core (100). An oblique surface (201) inclined relative to the end surface is provided between the outer end surface and the outer circumferential surface of the counterbalancing part (220).

Description

Motor rotor for compressor, motor for compressor and compressor

Technical field

The present invention relates to the field of compressor manufacturing technology, and in particular to a motor rotor for a compressor, a motor for the compressor having the motor rotor for the compressor, and the motor for the compressor. compressor.

Background technique

When the compressor is operated at a high rotational speed, the balance block agitates the refrigerant gas on the side of the compression mechanism (ie, the side of the motor facing the compression mechanism), resulting in the refrigerant on the side of the anti-compression mechanism (ie, the side of the motor facing away from the compression mechanism). The separation effect of the oil contained in the gas is lowered, and the refrigerant gas containing the oil is discharged into the refrigeration cycle system, thereby reducing the amount of oil in the oil pool in the compressor. Further, in order to return the oil separated from the refrigerant gas on the counter-compression mechanism side to the compression mechanism side, it is necessary to enlarge the area of the notch portion of the motor stator, and the motor characteristics of the compressor are lowered.

Summary of the invention

The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a motor rotor for a compressor which can improve the refrigerant gas under the condition of ensuring the motor characteristics of the compressor even when operating at a high rotational speed. The separation effect of the oil contained therein suppresses the inflow of oil in the refrigeration cycle system and ensures the amount of oil in the compressor.

The invention also proposes a motor for a compressor having the motor rotor for the compressor.

The invention also proposes a compressor having the electric machine for a compressor.

An electric machine rotor for a compressor according to an embodiment of the first aspect of the present invention includes: a rotor core having a compression end and a reverse compression end in an axial direction thereof; at least one balance block, the balance block including a mounting portion and a balance portion mounted on an end surface of at least one of a compression end and a reverse compression end of the rotor core, the balance portion being coupled to a surface of the mounting portion facing away from the end surface And extending along a circumferential direction of the rotor core, and an inclined surface inclined with respect to the end surface between the outer end surface and the outer peripheral surface of the balance portion.

The rotor of the motor for a compressor according to the embodiment of the present invention can suppress the agitation of the refrigerant gas and improve the refrigerant gas under the condition of ensuring the motor characteristics of the compressor, even if the rotor is operated at a high rotation speed. The separation effect of the oil contained in the refrigerant suppresses the inflow of the oil in the refrigeration cycle system and ensures the amount of oil in the compressor.

In addition, the motor rotor for a compressor according to an embodiment of the present invention has the following additional technical features:

According to some embodiments of the present invention, the slope extends along the length of the balance portion to two of the balance portions The end is such that the thickness of both ends of the balance portion is smaller than the thickness of the remaining portion of the balance portion.

According to some embodiments of the invention, the balance portion has a cross section of a right angle trapezoid.

According to some embodiments of the invention, the mounting portion is mounted on the rotor core by at least two rivets that are opposite in a radial direction of the rotor core.

According to some embodiments of the invention, the mounting portion is provided with a number of lightweight cuts that avoid the balance.

According to some embodiments of the invention, the weight is a non-magnetic piece.

According to some embodiments of the invention, the bevel is cast or forged.

According to some embodiments of the present invention, the balance block includes: a compression end balance block disposed on an end surface of the compression end of the rotor core; a reverse compression end balance block, the reverse compression end balance The block is disposed on an end surface of the anti-compression end of the rotor core, and the inclined surface is respectively disposed on the compression end balance block and the anti-compression end balance block.

Further, the motor rotor for a compressor further includes: a magnetic member having a magnetic groove penetrating the rotor core in an axial direction of the rotor core, the magnetic member being provided In the magnetic groove; a compression end cap, the compression end cap is disposed on an end surface of the compression end of the rotor core and at least a portion of the end surface of the compression end of the rotor core and the compression end balance block The compression end cap covers one end of the magnetic groove; the reverse compression end cap is disposed on an end surface of the anti-compression end of the rotor core and at least a portion thereof is located Between the end surface of the reverse compression end of the rotor core and the counter-compression end balance block, the reverse compression end cover covers the other end of the magnetic groove.

An electric machine for a compressor according to an embodiment of the second aspect of the present invention, comprising: a stator; the rotor, which is a motor rotor for a compressor according to an embodiment of the first aspect of the present invention, the rotor being rotatable Grounded in the stator.

According to the motor for a compressor according to the embodiment of the present invention, the motor rotor for the compressor as described above can suppress the agitation of the refrigerant gas under the condition of ensuring the characteristics of the motor even if it is operated at a high rotation speed. The separation effect of the oil contained in the refrigerant gas suppresses the inflow of the oil in the refrigeration cycle system and ensures the amount of oil in the compressor.

A compressor according to an embodiment of the third aspect of the present invention includes: a housing; a compression mechanism, the compression mechanism being disposed in the housing; an oil pool for storing oil, the oil pool being disposed in the housing a motor for driving the compression mechanism, the motor being a motor for a compressor according to an embodiment of the second aspect of the present invention, the motor being disposed in the housing and drivingly coupled to the compression mechanism The compression mechanism and the oil pool are both located on one side of the compression end of the rotor core, and the stator is provided with an oil passage that communicates with one side of the compression end of the rotor core and one side of the reverse compression end.

According to the compressor of the embodiment of the present invention, the motor for the compressor as described above can suppress the agitation of the refrigerant gas and improve the content of the refrigerant gas under the condition of ensuring the characteristics of the motor even when operating at a high rotation speed. The separation effect of the oil suppresses the inflow of oil in the refrigeration cycle system and ensures the amount of oil in the oil pool.

The additional aspects and advantages of the invention will be set forth in part in the description which follows.

DRAWINGS

1 is a schematic structural view of a rotor of an electric motor for a compressor according to an embodiment of the present invention;

Figure 2 is a cross-sectional view taken along line A-A of Figure 1;

3 is a schematic structural view of a rotor of a motor for a compressor according to a first alternative embodiment of the present invention;

Figure 4 is a cross-sectional view taken along line B-B of Figure 3;

Figure 5 is a structural schematic view of a rotor of an electric machine for a compressor in accordance with a second alternative embodiment of the present invention.

Reference mark:

Motor rotor 1 for a compressor,

Rotor core 100, magnetic slot 101,

The weight block 200, the slope 201, the compression end weight 202, the reverse compression end weight 203, the mounting portion 210, the lightweight slit 211, the balance portion 220,

The rivet 300, the magnetic member 400, the compression end cap 510, and the compression end cap 520.

detailed description

The embodiments of the present invention are described in detail below, and the examples of the embodiments are illustrated in the drawings, wherein the same or similar reference numerals are used to refer to the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are intended to be illustrative of the invention and are not to be construed as limiting.

In the description of the present invention, it is to be understood that the terms "length", "thickness", "upper", "lower", "inner", "outer", "clockwise", "counterclockwise", "axial" The orientation or positional relationship of the indications, "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description of the present invention and simplified description, rather than indicating or implying the indicated device. Or the components must have a particular orientation, are constructed and operated in a particular orientation, and thus are not to be construed as limiting the invention. Moreover, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, features defining "first" and "second" may include one or more of the features either explicitly or implicitly. In the description of the present invention, "a plurality" means two or more unless otherwise stated.

This application is based on the discovery and recognition of the following facts and issues by the inventors:

In the compressor of the related art, the oil in the compressor is mixed with the refrigerant gas discharged from the compression mechanism into a high temperature and high pressure state to form a mist, and the uniform or uneven gap formed by the motor stator and the motor rotor is the main passage. It flows upward to the side of the anti-compression mechanism (ie, the side of the motor that faces away from the compression mechanism). In order to correct the mechanical eccentricity of the compression mechanism, a balance block is usually placed on the rotor of the motor, so that when the compressor is operated at a higher rotational speed (for example, 100 rps - 120 rps), the balance block will agitate the compression mechanism side (ie, the motor face). One of the compression mechanisms The refrigerant gas on the side accelerates the flow rate of the refrigerant gas flowing upward, and the separation effect of the oil contained in the refrigerant gas on the side of the anti-compression mechanism is lowered, and the refrigerant gas containing the oil is discharged into the refrigeration cycle system, reducing the compression. The amount of oil in the oil pool inside the machine.

In order to solve the above technical problem, the balance block on the side of the anti-compression mechanism is usually integrally formed with the oil separator by rivets, however, when the compressor is operated at a higher rotation speed (for example, 150 rps - 240 rps), the discharge from the side of the compression mechanism is compressed. The high-temperature high-pressure refrigerant gas has a high fluid resistance, and the refrigerant gas containing the oil is stirred at the outer peripheral portion and the end portion of the balance block, and is formed uniformly or not by the notch portion disposed in the motor stator and the motor stator and the motor rotor. The uniform gap acts as a main passage and flows toward the side of the anti-compression mechanism, and the oil separated from the refrigerant gas on the side of the counter-compression mechanism cannot be returned to the side of the compression mechanism.

In order to return the oil separated from the refrigerant gas on the side of the anti-compression mechanism to the compression mechanism side, it is necessary to enlarge the area of the notch portion of the motor stator to reduce the flow rate of the refrigerant gas flowing upward from the compression mechanism side, resulting in a compressor. The motor characteristics are reduced.

To this end, the invention proposes a motor rotor 1 for a compressor which is particularly suitable for high-speed operation and which can improve the refrigerant gas under the condition of ensuring the motor characteristics of the compressor. The separation effect of the oil contained therein suppresses the inflow of oil in the refrigeration cycle system and ensures the amount of oil in the compressor.

An electric motor rotor 1 for a compressor according to an embodiment of the first aspect of the present invention will be described below with reference to Figs. Wherein, the compressor may include a compression mechanism for compressing the refrigerant gas.

As shown in FIGS. 1 to 5, a motor rotor 1 for a compressor according to an embodiment of the present invention includes a rotor core 100 and at least one weight 200.

Specifically, the rotor core 100 has a compression end and a reverse compression end in the axial direction of the rotor core 100. Here, the compression end of the rotor core 100 refers to one end of the rotor core 100 adjacent to the compression mechanism, and the rotor core The reverse compression end of 100 refers to the end of the rotor core 100 that is remote from the compression mechanism. For example, the axial direction of the rotor core 100 is oriented in the up and down direction, and the upper end of the rotor core 100 is a reverse compression end and the lower end is a compression end.

The weights 200 may be one or plural, and each of the weights 200 includes a mounting portion 210 and a balance portion 220. The mounting portion 210 is mounted on an end surface of at least one of the compression end and the reverse compression end of the rotor core 100, that is, a balance block 200 is disposed on the compression end or the reverse compression end of the rotor core 100, and the mounting portion 210 is disposed on the rotor The end surface of the compression end of the iron core 100 or the end surface of the reverse compression end, or the compression end and the reverse compression end of the rotor core 100 are provided with a weight 200, and the mounting portions 210 are respectively disposed on the end faces of the compression ends of the rotor core 100. And on the end face of the reverse compression end. The balance portion 220 is coupled to a surface of the mounting portion 210 facing away from the end surface, and the balance portion 220 extends in the circumferential direction of the rotor core 100. For example, the mounting portion 210 is a closed loop shape extending in the circumferential direction of the rotor core 100.

The inclined surface 201 inclined with respect to the end surface is provided between the outer end surface of the balance portion 220 and the outer peripheral surface, and the agitation of the refrigerant gas on the outer peripheral surface of the balance portion 220 can be suppressed. For example, the weights 200 are respectively set in the compression of the rotor core 100. On the end surface of the end surface and the end surface of the reverse compression end, the inclined surface 201 is obliquely extended from the outer end surface of the balance portion 220 in the radial direction of the rotor core 100 toward the surface of the mounting portion 210, that is, the slope 201 is inclined in the up and down direction, thereby It is possible to suppress the agitation of the refrigerant gas on the upper side of the rotor core 100 (that is, on the side of the anti-compression mechanism), to enhance the separation effect of the oil contained in the refrigerant gas, and to suppress the lower side of the rotor core 100 (that is, the compression mechanism side). The agitation of the refrigerant gas reduces the flow rate of the upwardly flowing refrigerant gas so that the separated oil can return to the lower side of the rotor core 100. It can be understood that the bevel 201 can be cast or forged to facilitate molding.

Thus, the motor rotor 1 for a compressor according to the embodiment of the present invention can suppress the stirring of the refrigerant gas and improve the stirring of the refrigerant gas even at a high rotation speed (for example, 150 rps - 240 rps) by using the inclined surface 201 on the weight 200. The separation effect of the oil contained in the refrigerant gas suppresses the inflow of the oil in the refrigeration cycle system, ensures the amount of oil in the compressor, and ensures the characteristics of the motor of the compressor since it is not necessary to enlarge the area of the notch portion of the stator of the motor. .

It should be noted that, in the motor rotor 1 for a compressor according to an embodiment of the present invention, when operating at a higher rotational speed (for example, 100 rps - 150 rps), only the balance block 200 is disposed on the end surface of the compression end of the rotor core 100. The above effects can be achieved. It can be understood that "higher speed" is not higher than "high speed".

According to some embodiments of the present invention, as shown in FIGS. 1 to 5, the slope 201 extends in the longitudinal direction of the balance portion 220 (ie, the circumferential direction of the rotor core 100) to both ends of the balance portion 220, so that the balance portion 220 The thickness of both ends is smaller than the thickness of the remaining portion of the balance portion 220, thereby suppressing the agitation of the refrigerant gas at both ends of the balance portion 220. Alternatively, as shown in FIGS. 2 and 4, the cross section of the balance portion 220 may be a right-angled trapezoid, that is, the outer peripheral surface of the balance portion 220 may be a slope 201, thereby enhancing the suppression of the stirring effect of the refrigerant gas.

In some embodiments of the present invention, as shown in FIGS. 1-5, the mounting portion 210 is mounted on the rotor core 100 by at least two rivets 300 that are opposed in the radial direction of the rotor core 100, thereby implementing the weight 200. Reliable assembly improves the mechanical strength of the centrifugal force of the compression mechanism of the compressor at high speeds. For example, the rivets 300 are four, and the four rivets 300 are evenly spaced along the circumferential direction of the rotor core 100 and opposed in the radial direction of the rotor core 100, so that the mechanical strength is higher.

Advantageously, as shown in FIG. 1 , FIG. 3 and FIG. 5 , the mounting portion 210 may be provided with a plurality of lightweight slits 211 avoiding the balance portion 220 , so that the center of gravity of the weight 200 can be adjusted to raise the weight of the balancing block 200 . The balance effect reduces the height of the balance block 200 in the up and down direction, so that the balance block 200 of the compression end of the rotor core 100 can further suppress the agitation of the refrigerant gas on the compression mechanism side to further reduce the flow rate of the upward flowing refrigerant gas; The counterweight 200 of the reverse compression end of the core 100 can further suppress the agitation of the refrigerant gas on the side of the anti-compression mechanism to further enhance the separation effect of the oil.

For example, as shown in FIG. 1, the lightweight slits 211 are one and extend along the circumferential direction of the rotor core 100; for example, as shown in FIG. 3, the lightweight slits 211 are four, and two of the four lightweight slits 211 The edges of the strips are respectively formed by three straight segments and one arc segment, and the other two lightweight slits 211 are respectively formed by the cutting process of the mounting portion 210; As shown in FIG. 5, the lightweight slits 211 are three, and the edges of one of the three lightweight slits 211 are respectively surrounded by a plurality of straight segments and a plurality of curved segments, and the remaining two lightweight slits 211 are respectively installed. The trimming process of the portion 210 is formed.

Preferably, the weight 200 may be a non-magnetic member, so that the leakage flux of the balance block 200 as a magnetic circuit can be reduced, the effective interlinkage flux of the coil of the motor stator can be prevented from being lowered, and the deterioration of the characteristics of the motor can be suppressed.

According to some embodiments of the present invention, as shown in FIGS. 1-4, the weight 200 may include a compression end weight 202 and a counter compression end weight 203, and the compression end weight 202 is disposed at the end of the compression end of the rotor core 100. The reverse compression end weight 203 is disposed on the end surface of the reverse compression end of the rotor core 100, and the compression end weight 202 and the reverse compression end weight 203 are respectively provided with slopes 201. Thereby, the compression end weight 202 can suppress the agitation of the refrigerant gas on the compression mechanism side to reduce the flow rate of the upward flowing refrigerant gas; the reverse compression end weight 203 can suppress the agitation of the refrigerant gas on the anti-compression mechanism side to lift the oil The separation effect of the liquid.

It can be understood that the heights of the compression end weight 202 and the counter compression end weight 203 may also differ depending on the amount of eccentricity of the compression mechanism. It will also be appreciated that the shape and configuration of the compression end weight 202 and the counter compression end weight 203 may be the same or different.

Further, as shown in FIGS. 1 to 5, the motor rotor 1 for a compressor may further include a magnetic member 400, a compression end cover 510, and a reverse compression end cover 520. Wherein, the magnetic member 400 can be a permanent magnet. The rotor core 100 is provided with a magnetic groove 101 penetrating the rotor core 100 in the axial direction of the rotor core 100, and the magnetic member 400 is disposed in the magnetic groove 101. The compression end cap 510 is disposed on an end surface of the compression end of the rotor core 100, and at least a portion of the compression end cap 510 is located between the end surface of the compression end of the rotor core 100 and the compression end weight 202, that is, the compression end cap The portion 510 is located between the lower end surface of the rotor core 100 and the compression end weight 202, or the compression end cover 510 is entirely located between the lower end surface of the rotor core 100 and the compression end weight 202. The reverse compression end cover 520 is disposed on the end surface of the reverse compression end of the rotor core 100, and at least a portion of the reverse compression end cover 520 is located between the end surface of the reverse compression end of the rotor core 100 and the counter compression end balance block 203, that is, The reverse compression end cover 520 is partially located between the upper end surface of the rotor core 100 and the counter compression end balance block 203, or the reverse compression end cover 520 is entirely located at the lower end surface of the rotor core 100 and the counter compression end balance block 203. between. Thus, the compression end cap 510 covers one end of the magnetic groove 101, and the reverse compression end cap 520 covers the other end of the magnetic groove 101, so that the magnetic member 400 can be prevented from coming out of the magnetic groove 101.

It can be understood that, as shown in FIG. 3 to FIG. 5, the mounting portion 210 of the compression end weight block 202 can cover the lower end of the magnetic groove 101 and the mounting portion 210 of the reverse compression end weight 203 can cover the upper end of the magnetic groove 101, thereby The compression end cap 510 and the reverse compression end cap 520 can be omitted, further reducing the height of the weight 200.

An electric machine for a compressor according to an embodiment of the second aspect of the present invention includes a stator and a rotor.

Specifically, the rotor is an electric machine rotor 1 for a compressor according to an embodiment of the first aspect of the present invention, and the rotor 1 is rotatably provided in the stator. Alternatively, the rotor 1 may be of a multi-stage configuration such as a quadrupole configuration or a hexapole configuration.

An electric machine for a compressor according to an embodiment of the present invention, using the motor rotor 1 for a compressor as described above, that is, By operating at a high rotational speed, it is also possible to suppress the agitation of the refrigerant gas under the condition of ensuring the characteristics of the motor, improve the separation effect of the oil contained in the refrigerant gas, suppress the inflow of the oil in the refrigeration cycle system, and ensure the inside of the compressor. The amount of oil.

Wherein, the stator may be mounted on the housing by a heat jacket or the like, the stator may include a stator core and a coil, the stator core has an annular yoke portion and a plurality of tooth portions distributed on the inner circumferential surface of the yoke portion, and the coil is A concentrated coil that is wound on a plurality of teeth. Of course, the above-mentioned technical effects can also be achieved by a motor using a distributed coil coil.

A compressor according to an embodiment of the third aspect of the present invention includes a housing, a compression mechanism, an oil sump, and a motor.

Specifically, the compressor may be a rotary compressor used in an appliance such as an air conditioner or a refrigerator. The compression mechanism is disposed in the housing, and the compression mechanism is used to compress the refrigerant gas. The oil pool is used to store oil, and the oil pool is disposed in the casing. The motor is used for driving a compression mechanism. The motor is a motor for a compressor according to an embodiment of the second aspect of the present invention. The motor is disposed in the housing, and the motor is coupled to the compression mechanism, and the compression mechanism and the oil pool are located at the rotor core. One side of the compression end (ie, the compression mechanism side, that is, the lower side of the rotor core), and the stator is provided with one side that connects the compression end of the rotor core and one side of the reverse compression end (ie, the side of the anti-compression mechanism, that is, the rotor) The oil side of the upper side of the iron core. Here, the oil passage refers to the cutout portion of the above stator.

According to the compressor of the embodiment of the present invention, the motor for the compressor as described above can suppress the stirring of the refrigerant gas on the upper side of the rotor core under the condition of ensuring the characteristics of the motor even when operating at a high rotation speed. The refrigerant gas can repeatedly impact the coil in the stator to enhance the separation effect of the oil contained in the refrigerant gas, and at the same time, suppress the agitation of the refrigerant gas on the lower side of the rotor core, and reduce the flow rate of the refrigerant gas flowing upward through the oil passage. The separated oil can be returned from the oil passage to the oil pool on the lower side of the rotor core to maintain the oil volume of the compressor.

Other configurations and operations of the compressor in accordance with embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail herein.

In the description of the present invention, it should be noted that the terms "mounting" and "connecting" are to be understood broadly, and may be, for example, a fixed connection, a detachable connection, or an integral, unless otherwise explicitly stated and defined. Ground connection; it can be a mechanical connection or an electrical connection. The specific meaning of the above terms in the present invention can be understood in a specific case by those skilled in the art.

In the description of the present specification, the description with reference to the terms "one embodiment", "some embodiments", "optional embodiment", "example" or "some examples" and the like means a specific description in connection with the embodiment or example A feature, structure, material or feature is included in at least one embodiment or example of the invention. In the present specification, the schematic representation of the above terms does not necessarily mean the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

While the embodiments of the present invention have been shown and described, the embodiments of the invention may The scope of the invention is defined by the claims and their equivalents.

Claims

An electric machine rotor for a compressor, comprising:

a rotor core having a compression end and a reverse compression end in an axial direction thereof;

At least one weight, the balance block including a mounting portion and a balance portion, the mounting portion being mounted on an end surface of at least one of a compression end and a reverse compression end of the rotor core, the balance portion being coupled to the A surface of the mounting portion facing away from the end surface extends along a circumferential direction of the rotor core, and an inclined surface inclined with respect to the end surface between the outer end surface and the outer peripheral surface of the balance portion.
The motor rotor for a compressor according to claim 1, wherein the slope extends to a length of the balance portion to both ends of the balance portion such that a thickness of both ends of the balance portion is smaller than The thickness of the remainder of the balance.
The motor rotor for a compressor according to claim 1, wherein the balance portion has a right-angled trapezoidal cross section.
The motor rotor for a compressor according to claim 1, wherein said mounting portion is mounted on said rotor core by at least two rivets opposed to each other in a radial direction of said rotor core.
The motor rotor for a compressor according to claim 1, wherein the mounting portion is provided with a plurality of lightweight slits that avoid the balance portion.
The motor rotor for a compressor according to claim 1, wherein the weight is a non-magnetic member.
The motor rotor for a compressor according to claim 1, wherein the slope is cast or forged.
The motor rotor for a compressor according to any one of claims 1 to 7, wherein the weighting block comprises:

a compression end balance block, the compression end balance block being disposed on an end surface of the compression end of the rotor core;

And a reverse compression end balance block, wherein the reverse compression end balance block is disposed on an end surface of the reverse compression end of the rotor core, and the inclined surface is respectively disposed on the compression end balance block and the reverse compression end balance block.
The motor rotor for a compressor according to claim 8, further comprising:

a magnetic member, the rotor core is provided with a magnetic groove penetrating the rotor core along an axial direction of the rotor core, and the magnetic member is disposed in the magnetic groove;

a compression end cap, the compression end cap being disposed on an end surface of the compression end of the rotor core and at least a portion being located between an end surface of the compression end of the rotor core and the compression end balance block, the compression end An end cap covers one end of the magnetic groove;

a reverse compression end cap disposed on an end surface of the reverse compression end of the rotor core and at least partially located between an end surface of the reverse compression end of the rotor core and the counter-compression end balance block The reverse compression end cap covers the other end of the magnetic groove.
A motor for a compressor, comprising:

stator;

A rotor for an electric machine rotor for a compressor according to any one of claims 1 to 9, the rotor being rotatably disposed within the stator.
A compressor, comprising:

case;

a compression mechanism, the compression mechanism being disposed in the housing;

An oil pool for storing oil, the oil pool being disposed in the casing;

a motor for driving the compression mechanism, the motor being the motor for a compressor according to claim 10, the motor being disposed in the housing and drivingly coupled to the compression mechanism, the compression mechanism And the oil pool are located on one side of the compression end of the rotor core and the stator is provided with an oil passage that communicates with one side of the compression end of the rotor core and one side of the reverse compression end.