KR102133847B1 - Motor and compressor including the same - Google Patents

Abstract

The present invention relates to a motor which comprises a stator and a rotor core rotating with regard to the stator. A blade shape can be provided on one surface of the rotor core. More specifically, according to a first viewpoint of the present invention, the motor comprises: the rotor core formed by stacking a plurality of circular magnetic steel plates and including at least one of a rivet hole for coupling the plurality of magnetic steel plates, a shaft coupling hole for coupling a rotation shaft, and a weight reduction hole; and a rotor cover including a first hole located on a first surface of the rotor core and opening the weight reduction hole and having a first blade provided on one side of the first hole.

Description

Motor and compressor with the same {Motor and compressor including the same}

The present invention relates to a motor, and more particularly, to an inner rotor type motor in which a stator is located on the outer circumferential side of the rotor and a compressor including the same.

Generally, a compressor operates by driving a motor. Such a motor includes a stator with a winding and a fixed winding, and a rotor rotating about the stator.

Usually, the rotor (rotor core) may be formed by stacking circular magnetic steel plates, and a plurality of permanent magnets may be provided in the rotor core.

Rotor covers may be coupled to both sides of the rotor core. At this time, the rotor cover may be coupled to the rivet hole by a coupling hole. In addition, through-holes other than the shaft coupling hole may be formed in the rotor core. In some cases, these through-holes can help the flow of refrigerant.

In addition, a balance weight may be coupled to the rotor cover. As described above, when the rotor cover and the balance weight are assembled on the rotor core, the through hole of the rotor core is covered.

As described above, the rotor cover acts as a resistance of the flow path connected to the compressor from the suction port, and may act as a factor to lower the compression efficiency.

Accordingly, there is a need for a method capable of smoothing the flow of refrigerant and improving compression efficiency in the structure of the rotor core.

The configuration for increasing the intake refrigerant flow rate of a motor used in such a compressor is published in the following prior art documents (Patent Document 1).

1. Japanese Patent Publication No. 5817605

The technical problem to be achieved by the present invention is to solve the above problems, to provide a motor and a compressor having the same that can lower the resistance of the refrigerant intake passage.

In addition, the present invention is to provide a motor and a compressor having the same that can actively improve the suction efficiency of the refrigerant.

In addition, the present invention is to provide a motor and a compressor having the same to improve the magnetic flux concentration effect by exerting a synergy effect with the magnetic flux barrier.

As a first aspect for achieving the above technical problem, the present invention relates to a motor including a stator and a rotor core rotating relative to the stator, and a blade shape may be provided on one surface of the rotor core.

This blade shape rotates with the rotor core of the motor, and in particular, when the motor is applied to the compressor, it is possible to minimize the flow path resistance of the suction refrigerant and increase the efficiency of the refrigerant being sucked into the compression space.

In addition, through-holes for weight reduction are present in the rotor core of the motor, and the blade shape is provided on one side of the through-holes to improve the efficiency of refrigerant flowing through the through-holes.

More specifically, the present invention according to the first aspect is made by stacking a plurality of circular magnetic steel plates, and at least one of a rivet hole for coupling the plurality of magnetic steel plates, a shaft coupling hole for rotating shaft coupling, and a weight loss hole. It includes a rotor core including any one and a first hole located on the first surface of the rotor core and opening the weight loss hole, and includes a rotor cover having a first blade on one side of the first hole can do.

In addition, a plurality of weight loss holes may be provided through the rotor core in a direction parallel to the shaft coupling hole, and the first hole may be formed in a number corresponding to the weight loss holes.

Further, the first blade may include a flat blade and a composite blade including a flat portion and a curved portion.

Further, on the rotor core, the flat blade and the composite blade may be alternately positioned.

In addition, the curvature of the curved portion may be the same as the curvature of the rivet hole.

Further, the first blade may be provided in at least one of the plurality of first holes.

In addition, the first blade may be provided in a first hole located in half of the area of the rotor cover around the diameter of the rotor cover.

Further, the first blade may be provided in the first hole in a direction opposite to the rotational direction of the rotor.

Further, on the rotor cover, a first balance weight including a second hole provided with a second blade on one side while opening the weight loss hole may be further included.

In addition, the first balance weight may be coupled to a portion where the first blade on the rotor cover is not provided.

In addition, a plurality of second holes may be formed corresponding to the plurality of weight loss holes.

In addition, the second blade may include a flat blade and a composite blade including a flat portion and a curved portion.

Further, the flat blade and the composite blade may be alternately positioned.

In addition, the second blade may be provided in the second hole in a direction opposite to the rotational direction of the rotor.

As a second aspect for achieving the above technical problem, the present invention can provide a compressor including a motor having a blade shape on one surface of a rotor core.

More specifically, the present invention according to the second aspect, a motor having the above characteristics, a rotating shaft coupled to the shaft coupling hole of the rotor of the motor, and a frame installed on one side of the motor to support the rotating shaft , It may include a fixed scroll coupled to the frame to form a compressed space and eccentrically coupled to the rotating shaft, positioned in the compressed space, coupled to the fixed scroll to orbit to scroll the fluid to compress the fluid.

The present invention has the following effects.

According to the present invention, the blade shape is rotated together with the rotor core of the motor, and in particular, when the motor is applied to the compressor, it is possible to minimize the flow resistance of the suction refrigerant and increase the efficiency of the refrigerant being sucked into the compressed space.

In addition, through-holes for weight reduction are present in the rotor core of the motor, and the blade shape is provided on one side of the through-holes to improve the efficiency of refrigerant flowing through the through-holes.

Further scope of applicability of the present invention will become apparent from the following detailed description. However, various changes and modifications within the spirit and scope of the present invention may be clearly understood by those skilled in the art, and thus, it should be understood that specific embodiments such as detailed description and preferred embodiments of the present invention are given as examples only.

1 is a cross-sectional view showing a compressor according to an embodiment of the present invention.
2 is a cross-sectional view showing a rotor assembly according to an embodiment of the present invention.
3 is a perspective view showing a rotor core according to an embodiment of the present invention.
4 is a perspective view showing a typical rotor core assembly.
5 is a perspective view showing a rotor assembly according to an embodiment of the present invention.
6 is a plan view showing a rotor cover according to an embodiment of the present invention.
7 is a view seen from the direction A of FIG. 6.
8 is a view seen from the direction B of FIG. 6.
9 is a plan view showing a first balance weight according to an embodiment of the present invention.
10 is a view seen from the direction C of FIG. 9.
11 is a view seen from the direction D of FIG. 9.

Hereinafter, exemplary embodiments disclosed in the present specification will be described in detail with reference to the accompanying drawings, but the same or similar elements are assigned the same reference numbers regardless of the reference numerals, and overlapping descriptions thereof will be omitted. The suffixes "modules" and "parts" for components used in the following description are given or mixed only considering the ease of writing the specification, and do not have meanings or roles distinguished from each other in themselves. In addition, in the description of the embodiments disclosed herein, when it is determined that detailed descriptions of related known technologies may obscure the gist of the embodiments disclosed herein, detailed descriptions thereof are omitted. In addition, the accompanying drawings are only for easy understanding of the embodiments disclosed in the present specification, and the technical spirit disclosed in the specification is not limited by the accompanying drawings, and all modifications included in the spirit and technical scope of the present invention , It should be understood to include equivalents or substitutes.

Terms including ordinal numbers such as first and second may be used to describe various components, but the components are not limited by the terms. The terms are used only for the purpose of distinguishing one component from other components.

When an element is said to be "connected" or "connected" to another component, it is understood that other components may be directly connected to or connected to the other component, but there may be other components in between. It should be. On the other hand, when a component is said to be "directly connected" or "directly connected" to another component, it should be understood that no other component exists in the middle.

Singular expressions include plural expressions unless the context clearly indicates otherwise.

In this application, terms such as “comprises” or “have” are intended to indicate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, and that one or more other features are present. It should be understood that the existence or addition possibilities of fields or numbers, steps, operations, components, parts or combinations thereof are not excluded in advance.

1 is a cross-sectional view showing a compressor according to an embodiment of the present invention. 1 shows a horizontal scroll compressor.

The horizontal scroll type compressor 100 includes a casing 110 having an enclosed inner space, and components for compressing a fluid may be installed in the casing 110. That is, in the casing 110, the motor 200, the rotating shaft 300, the fixed scroll 500 and the orbiting scroll 600 interlocking with each other, and may include a frame 400 on which the rotating shaft 300 is installed. .

The casing 110 for forming a closed space may be formed in the form of a horizontal cylinder. In the casing 110, a suction port 111 and a discharge port 112 for entering and exiting the refrigerant may be formed.

A motor 200 generating rotational force may be installed in the inner space of the casing 110. In addition, a rotating shaft 300 coupled to a rotor (rotor core) 210 of the motor 200 may be installed.

The rotating shaft 300 may be eccentrically coupled to the orbiting scroll 600. That is, the motor 200 may provide a rotational force through which the orbiting scroll 600 orbits through the rotation shaft 300.

The frame 400 may be installed on one side of the motor 200. The frame 400 may be formed of a material having a high hardness as the main frame.

The frame 400 may provide a supporting structure in which the fixed scroll 500 and the orbiting scroll 600 can be installed. That is, the fixed scroll 500 may be coupled to the frame 400 to form a compressed space 501.

At this time, the casing 110 includes a discharge chamber 101 through which refrigerant gas is discharged from the compression space 501, and the discharge port 112 is provided in the discharge chamber 101, and the refrigerant in the discharge chamber 101 is provided. May be discharged through the discharge port 112. The flow of refrigerant in FIG. 1 is indicated by arrowheads (F).

In the discharge chamber 101, oil may be separated from the refrigerant through the oil separator 113, and oil separated at the lower side may be sucked through the oil pick-up and supplied to each rotating part.

A separate inverter space may be provided on the inlet 111 side of the casing 110, and the inverter unit 120 may be located in the inverter space.

2 is a cross-sectional view showing a rotor assembly according to an embodiment of the present invention.

The motor 200 is installed in the inner space of the casing 110 to generate rotational force, and a stator including a stator 220 in which a winding is installed and an insulator 230 coupled to the stator 220 to insulate the winding An assembly and a rotor (or rotor core) 210 coupled to the stator assembly and rotating may be included. Hereinafter,'rotor' will be described as a term having the same meaning as'rotor core'. Therefore,'rotor' and'rotor core' will be described using the same reference numeral 210.

As such, the motor 200 may have an internal rotor-type structure in which the stator 220 is located on the outer circumferential side of the rotor 210. However, the present invention is not limited to this. That is, the technical features of the motor 200 described in the present invention can be applied to the same or similar to the external rotor type structure in which the stator 220 is located inside and the rotor 210 is located on the outer circumference side.

First, the motor 200 may include a rotor core 210 formed by stacking a plurality of circular magnetic steel plates.

The rotor core 210 includes rivet holes 213 for coupling a plurality of magnetic steel plates (see FIG. 3), shaft coupling holes 211 for rotation axis coupling (see FIG. 3), and weight loss holes 214 (see FIG. 3). ).

The motor 200 may include a rotor cover 250 having first blades 251 and 252 positioned on a first surface of the rotor core 210 and positioned on the side of the weight loss hole 214.

In addition, on the rotor cover 250, a first balance weight (260) having second blades 261 and 262 on one side (only a second blade corresponding to reference numeral 262 is shown in FIG. 2) is provided. Can be located.

The first balance weight 260 may be coupled to a portion where the first blades 251 and 252 on the rotor cover 250 are not provided.

At least one of the rotor cover 250 and the first balance weight 260 may reduce the flow path resistance of the sucked refrigerant when the motor 200 is used in the compressor, and also smoothly flow the refrigerant. can do.

Meanwhile, a second balance weight 710 may be located on a second surface that is opposite to the first surface of the rotor core 210. The second balance weight 710 may be located on the opposite side of the first balance weight 260 based on the circular shape of the rotor core 210.

The configuration of the motor 200 will be described later in detail.

Referring to FIG. 1 again, the inverter unit 120 installed in the inverter space may be electrically connected to the motor 200 through the connector 240 to drive the motor 200.

On the other hand, one side of the frame 400 may be provided with a bearing 310 for sealing the compression space while fixing the rotating shaft 300 so as to be rotatable. On the other hand, in some cases, the bearing 320 is also installed on the inner end side of the casing 100 to help the rotating shaft 300 to rotate smoothly.

Between the fixed scroll 500 and the frame 400, the orbiting scroll 600 coupled to the fixed scroll 500 and pivoting with respect to the fixed scroll 500 may be installed.

The orbiting scroll 600 is connected to the rotating shaft 300 and is eccentrically coupled to the center of the rotating shaft 300, so that the orbiting movement can be implemented.

In this way, in the scroll type compressor 100, a compression chamber 501 is formed between the orbiting scroll 600 and the fixed scroll 500, and a back pressure chamber (between the orbiting scroll 600 and the frame 400) is formed. 401) may be formed.

A third balance weight 700 may be installed in the back pressure chamber 401 to offset the centrifugal force generated by the turning of the orbiting scroll 600. The third balance weight 700 may be installed on the rotating shaft 300 and may be installed on the opposite side to the eccentric direction of the rotating shaft 300.

3 is a perspective view showing a rotor core according to an embodiment of the present invention.

3, the rotor core 210 is formed with a rivet hole 213 for coupling a plurality of magnetic steel plates, a shaft coupling hole 211 for rotating shaft coupling, and a magnet hole 212 for coupling magnets Can be.

In addition, a weight reduction hole 214 for reducing the weight of the rotor core 210 may be formed in the rotor core 210.

As shown in FIG. 3, a plurality of such weight loss holes 214 may be formed in a circumferential direction on one surface of the rotor core 210. In addition, the plurality of weight loss holes 214 may be formed at regular intervals in a circumferential direction on one surface of the rotor core 210.

The weight reduction hole 214 may be formed along the peripheral side of the shaft coupling hole 211. In addition, the weight loss hole 214 may be formed along the inside of the magnet hole 212. The weight loss hole 214 may include a curved portion to avoid interference with the rivet hole 213.

Here, the weight loss hole 214 may also serve as a through hole through which the refrigerant passes. That is, the hole passing through the rotor core 210 is referred to as a weight loss hole 214 according to its purpose, but this may be the case if the hole penetrates the rotor core 210.

4 is a perspective view showing a typical rotor core assembly.

Referring to FIG. 4, rotor covers 215 may be coupled to both sides of the rotor core 210 as described in FIG. 3. At this time, the rotor cover 215 may be coupled to the rivet hole 213 by a coupling hole 217.

In addition, a balance weight 216 may be coupled to the rotor cover 215. As described above, when the rotor cover 215 and the balance weight 216 are assembled on the rotor core 210, the weight loss hole 214 as described above is covered.

Therefore, the rotor cover 215 acts as a resistance of the flow path connected to the compressor from the suction port, and may act as a factor to lower the compression efficiency.

5 is a perspective view showing a rotor assembly according to an embodiment of the present invention.

Referring to FIG. 5, as mentioned above, the motor 200 is located on the first surface of the rotor core 210 and is located on the first surface of the rotor core 210 and located on the side of the weight loss hole 214. It may include a rotor cover 250 is provided with the first blade (251, 252).

In addition, on the rotor cover 250, a first balance weight 260 having second blades 261 and 262 may be positioned on one side.

The first balance weight 260 may be coupled to a portion where the first blades 251 and 252 on the rotor cover 250 are not provided.

At least one of the rotor cover 250 and the first balance weight 260 may reduce the flow path resistance of the sucked refrigerant when the motor 200 is used in the compressor, and also smoothly flow the refrigerant. can do.

In this case, the first blades 251 and 252 may include a flat blade 251 and a composite blade 252 including a flat portion and a curved portion.

Further, on the rotor core 210, the flat blade 251 and the composite blade 252 may be alternately positioned along the circumferential direction of the first surface of the rotor core 210.

The rotor cover 250 may include a first hole 254 located on the first surface of the rotor core 210 and opening the weight loss hole 214. In this case, the first blades 251 and 252 may be provided on one side of the first hole 254.

A plurality of first holes 254 may be formed corresponding to the plurality of weight loss holes 214, while the first blades 251 and 252 may be at least one of the plurality of first holes 254. It may be provided in. The first blades 251 and 252 may be located in one direction of the first hole 254.

At this time, as shown in FIG. 5, the first blades 251 and 252 are the first holes 254 located in half of the area of the rotor cover 250 around the radial direction of the rotor cover 250. It may be provided in.

That is, the first blades 251 and 252 may not be provided in the first hole 254 corresponding to the other half of the rotor cover 250 area. The reason is that the first balance weight 260 may be located on the first hole 254 corresponding to the other half of the area of the rotor cover 250.

The first balance weight 260 may include a second hole 263 opening the weight loss hole 214. At this time, the second blades 261 and 262 may be provided on one side of the second hole 263.

Also, the second hole 263 may correspond to the first hole 254 of the rotor cover 250. More specifically, the second hole 263 of the first balance weight 260 may coincide with the first hole 254 of the rotor cover 250.

In addition, the first balance weight 260 may be coupled to a portion where the first blades 251 and 252 on the rotor cover 250 are not provided.

Like the first hole 254, the second hole 263 may be formed in a number corresponding to the plurality of weight loss holes 214, while the second blades 261 and 262, such a plurality of second It may be provided in at least one of the holes 254.

At this time, as illustrated in FIG. 5, the second blades 261 and 262 may be provided in both of the first holes 263. Also, the second blades 261 and 262 may be located in one direction of the first hole 263.

Hereinafter, the rotor cover 250 and the first balance weight 260 will be described in more detail.

6 is a plan view showing a rotor cover according to an embodiment of the present invention. 7 is a view seen from the direction A of FIG. 6, and FIG. 8 is a view seen from the direction B of FIG. 6.

Referring to FIG. 6, a first hole 254 may be formed in the rotor cover 250 at a position corresponding to the weight loss hole 214 along the circumferential direction. The first hole 254 may open the weight loss hole 214 when the rotor cover 250 is installed on the rotor core 210. In addition, the first hole 254 may be formed in the same shape as the weight loss hole 214.

In this case, first blades 251 and 252 may be provided in one direction in the first hole 254 corresponding to half of the plurality of first holes 254. As illustrated in FIG. 6, the first blades 251 and 252 are not provided in the first hole 254 corresponding to the upper half, and the first blade 251 is provided in the first hole 254 corresponding to the lower half. , 252) may be provided.

In addition, the first blades 251 and 252 may be provided in the first hole 254 in a direction opposite to the rotational direction R of the rotor core 210.

As described above, the first blades 251 and 252 provided in the opposite direction to the rotational direction R can help the refrigerant flow smoothly by rotation of the rotor core 210.

Accordingly, the rotor cover 250 can effectively improve the suction flow path resistance.

As mentioned above, the first blades 251 and 252 may include a flat blade 251 and a composite blade 252 including a flat portion 251a and a curved portion 252b.

Further, on the rotor core 210, the flat blade 251 and the composite blade 252 may be alternately positioned along the circumferential direction of the first surface of the rotor core 210.

The first hole 254 may have the same shape as the weight loss hole 214, and thus, the first hole 254 may have a curved portion according to the shape of the coupling hole 253 corresponding to the rivet hole 213. It can contain.

Accordingly, the composite blade 252 may include a flat plate portion 252a and a curved portion 252b.

Therefore, the curved portion 252b of the composite blade 252 may be formed corresponding to the shape of the coupling hole 253 corresponding to the rivet hole 213. Accordingly, the curvature of the curved portion 252b may be the same as the curvature of the rivet hole 213.

9 is a plan view showing a first balance weight according to an embodiment of the present invention. 10 is a view seen from the direction C of FIG. 9, and FIG. 11 is a view seen from the direction D of FIG. 9.

Referring to FIG. 9, a second hole 263 may be formed in the first balance weight 260 at a position corresponding to the weight loss hole 214 along the circumferential direction. The second hole 263 may open the weight loss hole 214 when the rotor cover 250 and the first balance weight 260 are installed on the rotor core 210. In addition, the second hole 263 may be formed in the same shape as the weight loss hole 214.

As illustrated, the first balance weight 260 may have an area of half of the rotor cover 250.

In this case, a plurality of second holes 263 may be provided with second blades 261 and 262 in one direction. 9, second blades 261 and 262 may be provided in the entire second hole 263.

Further, the second blades 261 and 262 may be provided in the second hole 263 in a direction opposite to the rotation direction R of the rotor core 210.

As described above, the second blades 261 and 262 provided in the opposite direction to the rotational direction R can help the refrigerant flow smoothly by rotation of the rotor core 210.

Therefore, the first balance weight 260 can effectively improve the suction flow path resistance by working together with or independently of the rotor cover 250.

As mentioned above, the second blades 261 and 262 may include a flat blade 261 and a composite blade 262 including a flat portion 262a and a curved portion 262b.

Further, on the rotor core 210, the flat blade 251 and the composite blade 252 may be alternately positioned along the circumferential direction of the first balance weight 260.

The second hole 263 may have the same shape as the weight loss hole 214, and thus, the second hole 254 may have a curved portion according to the shape of the coupling hole 264 corresponding to the rivet hole 213. It can contain.

Accordingly, the composite blade 262 may include a flat plate portion 262a and a curved portion 262b.

Accordingly, the curved portion 262b of the composite blade 262 may be formed corresponding to the shape of the coupling hole 264 corresponding to the rivet hole 213. Accordingly, the curvature of the curved portion 262b may be the same as the curvature of the rivet hole 213.

As described above, according to the present invention, the blade shape is rotated together with the rotor core of the motor, in particular, when the motor is applied to the compressor, the flow resistance of the suction refrigerant is minimized and the efficiency of the refrigerant being sucked into the compression space is increased. Can be.

In addition, through-holes for weight reduction are present in the rotor core of the motor, and the blade shape is provided on one side of the through-holes to improve the efficiency of refrigerant flowing through the through-holes.

Features, structures, effects, etc. described in the above embodiments are included in at least one embodiment of the present invention, and are not necessarily limited to only one embodiment. Furthermore, features, structures, effects, and the like exemplified in each embodiment may be combined or modified for other embodiments by a person having ordinary knowledge in the field to which the embodiments belong. Therefore, the contents related to such combinations and modifications should be interpreted as being included in the scope of the present invention.

In addition, although the embodiments have been mainly described above, these are merely examples and do not limit the present invention, and those skilled in the art to which the present invention pertains are exemplified above without departing from the essential characteristics of the present embodiment. It will be appreciated that various modifications and applications are possible. For example, each component specifically shown in the embodiments can be implemented by modification. And differences related to these modifications and applications should be construed as being included in the scope of the invention defined in the appended claims.

100: compressor 110: casing
120: inverter unit
200: motor 210: rotor (rotor core)
211: Shaft engaging hole 213: Rivet hole
214: weight loss hole
220: stator 230: insulator
250: rotor cover 251, 252: first blade
260: first balance weight
261, 262: second blade
300: rotating shaft 400: frame
500: fixed scroll 600: orbiting scroll
700: Balance weight 800: Elastic plate

Claims (15)

A rotor core formed by stacking a plurality of circular magnetic steel plates and including at least one of a rivet hole for coupling the plurality of magnetic steel plates, an axis coupling hole for rotating shaft coupling, and a weight loss hole;
A rotor cover including a first hole located on a first surface of the rotor core and opening the weight loss hole, and having a first blade on one side of the first hole-the rotor cover has the first blade A first part provided and a second part not provided with the first blade; And
And a first balance weight located on a second portion of the rotor cover and opening the weight loss hole and including a second hole with a second blade on one side. The method of claim 1, wherein the weight loss hole is provided in plural number through the rotor core in a direction parallel to the shaft coupling hole,
The first hole is a motor characterized in that a plurality of formed corresponding to the plurality of weight loss holes. The method of claim 2, wherein the first blade,
Flat blades; And
And a composite blade including a flat plate portion and a curved portion. The motor according to claim 3, wherein on the rotor core, the flat blade and the composite blade are alternately positioned. The motor according to claim 3, wherein the curvature of the curved portion is the same as the curvature of the rivet hole. The motor according to claim 3, wherein the first blade is provided in at least one of the plurality of first holes. The motor according to claim 6, wherein the first blade is provided in a first hole located in half of the rotor cover area around the diameter of the rotor cover. The motor according to claim 1, wherein the first blade is provided in a direction opposite to a rotational direction of the rotor in the first hole. delete delete The motor according to claim 1, wherein a plurality of the second holes are formed corresponding to the plurality of weight loss holes. The method of claim 1, wherein the second blade,
Flat blades; And
And a composite blade including a flat plate portion and a curved portion. The motor of claim 12, wherein the flat blade and the composite blade are alternately positioned. The motor according to claim 1, wherein the second blade is provided in the second hole opposite to the rotational direction of the rotor. A rotor core formed by stacking a plurality of circular magnetic steel plates and including at least one of a rivet hole for coupling the plurality of magnetic steel plates, an axis coupling hole for rotating shaft coupling, and a weight loss hole; A rotor cover including a first hole located on a first surface of the rotor core and opening the weight loss hole, and having a first blade on one side of the first hole-the rotor cover has the first blade A first part provided and a second part not provided with the first blade; And a first balance weight located on a second portion of the rotor cover, opening the weight loss hole and including a second hole with a second blade on one side;
A rotating shaft coupled to and rotated by an axial coupling hole of the rotor of the motor;
A frame installed on one side of the motor to support the rotating shaft;
A fixed scroll coupled to the frame to form a compressed space; And
A scroll type compressor comprising an orbiting scroll that is eccentrically coupled to the rotating shaft, is located in the compression space, and is coupled to the fixed scroll to perform orbiting motion to compress fluid.

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