KR20190102584A - Motor-operated compressor - Google Patents

Abstract

According to the present invention, an electric compressor comprises: a casing in which a rotary shaft is stored; a drive unit rotating the rotary shaft; and a compression unit having a first scroll fixed to the casing and a second scroll connected to the rotary shaft to be engaged with the first scroll to circle and form a compression chamber of which volume is changed. The first scroll comprises a chamfer unit formed inclined with respect to an axial direction and a radial direction of the rotary shaft to be supported by an inner surface of the casing. Accordingly, the first scroll can be operated by being stably supported by the inner surface of the casing.

Description

Electric Compressor {MOTOR-OPERATED COMPRESSOR}

The present invention relates to a compressor, and more particularly, to an electric compressor having a pair of scrolls to compress a fluid.

In general, the compressor that serves to compress the refrigerant in the vehicle air conditioning system has been developed in various forms, and in recent years, the development of the electric compressor driven by the electric using the motor is actively made according to the trend of the lengthening of the automotive parts.

Among the various compression methods, the motor-driven compressor mainly adopts a scroll compression method suitable for high compression ratio operation. In the scroll-type electric compressor, a motor part made of a rotating motor is installed in the sealed casing, and a compression part made of a fixed scroll and a swing scroll is installed at one side of the motor part. Then, the motor unit and the compression unit is connected to the rotating shaft so that the rotational force of the motor unit is transmitted to the compression unit. The rotational force transmitted to the compression unit pivots the swinging scroll with respect to the fixed scroll to form two pairs of compression chambers, a suction chamber, an intermediate pressure chamber, and a discharge chamber, and the refrigerant is sucked into both compression chambers to compress and discharge at the same time. do.

As disclosed in Patent Literature 1, a discharge space for accommodating the refrigerant discharged from the compression chamber is formed in the scroll compressor-type electric compressor. Specifically, the discharge space is formed between the fixed scroll and the rear head, the refrigerant contained in the discharge space may be discharged to the outside of the compressor via the oil separator. Also, in order to prevent leakage of the discharge space and support the fixed scroll, the rear head and the fixed scroll are supported with each other in the axial direction of the rotating shaft.

However, since the compressed refrigerant flowing into the discharge space during the operation of the electric compressor has high temperature and high pressure, the rear head may be expanded or deformed by heat and pressure. When the rear head is inflated or deformed, there is a possibility that the bearing force in which the rear head and the fixed scroll are in close contact with each other is weakened or the contact state is released.

When the support state of the fixed scroll is weakened as described above, the fixed scroll during the driving of the electric compressor may be shaken in the axial direction and the circumferential direction of the rotating shaft. As a result, leakage of the compression chamber may occur or vibration and noise may increase.

Accordingly, there is a need to design an electric compressor having a structure in which the support state with the fixed scroll can be sufficiently maintained even if the rear head is expanded or deformed by the high temperature and the high pressure of the discharged refrigerant. In particular, it is desirable to derive a structure in which the rear head and the fixed scroll can be mutually contacted and supported in a direction other than the axial direction of the rotation axis.

KR 10-2017-0139394 A (published 19 December 2017)

One object of the present invention is to provide an electric compressor, wherein the casing and the fixed scroll form mutually support surfaces that are inclined with respect to the axial and radial directions of the rotating shaft.

In addition, another object of the present invention is to provide an electric compressor in which a rear head forming a discharge space supports the fixed scroll in the axial direction and the radial direction of the rotating shaft.

In order to achieve the object of the present invention, an electric compressor according to the present invention includes a casing in which a rotating shaft is accommodated; A drive unit for rotating the rotating shaft; And a compression unit having a first scroll fixed to the casing, and a second scroll connected to the rotational shaft to form a compression chamber in which a volume is changed by pivoting in engagement with the first scroll. Is provided with a chamfer formed to be inclined with respect to the axial direction and the radial direction of the rotating shaft to be supported on the inner surface of the casing.

The first scroll may include a first hard plate portion having a disc shape having one side forming the compression chamber and the other side forming a discharge space for receiving a refrigerant compressed in the compression chamber, and the chamfer portion having the first hard plate portion. It may be formed along the other edge.

The casing includes a rear head overlapping the other side of the first hard plate portion to form the discharge space, and the rear head extends to surround the discharge space and is formed to be inclined to correspond to the chamfer portion. 1 may be provided with a chamfer support for supporting the scroll.

The casing may include a shell extending in a cylindrical shape and having a portion of an inner circumferential surface thereof facing an outer circumferential surface of the first hard plate portion; And a rear head configured to overlap the end of the shell to form the discharge space, wherein the rear head includes a rear side wall coupled to an end of the shell and inclined so that at least a portion of an inner circumferential surface thereof corresponds to the chamfer portion. It can be provided.

The first scroll may further include a sealing part formed on the other side of the first hard plate part to extend along the circumference of the discharge space and to be pressed by the casing to seal the discharge space.

In addition, the motor-driven compressor according to the present invention to achieve another object of the present invention, the casing for receiving a rotating shaft; A drive unit for rotating the rotating shaft; And a compression unit having a first scroll fixed to the casing, and a second scroll connected to the rotational shaft to form a compression chamber in which a volume is changed by pivoting in engagement with the first scroll, wherein the casing includes: A rear head overlapping the first scroll, wherein the rear head includes: a discharge groove recessed in a surface facing the first scroll to form a discharge space accommodating the compressed refrigerant in the compression chamber; And a rear side wall extending to surround the discharge groove and formed to support the first scroll in the axial direction and the radial direction of the rotation shaft.

The first scroll may include a first hard plate portion having a disk shape having one side forming the compression chamber and the other side forming a discharge space for receiving the refrigerant compressed in the compression chamber, and the rear side wall is the discharge groove. A first support part extended to be adjacent to and supported on the other side of the first light plate part; And a second support part extending to surround the first support part and supported on an outer circumferential surface of the first hard plate part.

The rear side wall further includes a chamfer support part extending to connect between the first support part and the second support part, and formed to be inclined in the axial direction and the radial direction of the rotation shaft, and the first scroll further includes: It may further include a chamfer extending along the side edges and in contact with the chamfer support.

According to the present invention constituted by the solutions described above, the following effects can be obtained.

In the motor-driven compressor of the present invention, the first scroll has a chamfer portion to be supported on the inner surface of the casing, so that the first scroll functioning as a fixed scroll during the operation of the compressor can be stably behaved. Accordingly, the vibration and noise can be reduced, there is an advantage that the sealing of the compression chamber can be further ensured.

In addition, in the electric compressor of the present invention, since the rear head forming the discharge space is supported in the axial direction and the radial direction of the rotating shaft by the first scroll, the first scroll can maintain a stable position during the operation of the compressor. In particular, even if the rear head is expanded or deformed by the heat and pressure of the discharge space, the rear head can maintain a state of pressing the first scroll, so that the stability and reliability of the compressor can be improved.

1 is a cross-sectional view showing an electric compressor according to an embodiment of the present invention.
FIG. 2 is an enlarged view of the region A shown in FIG. 1.
FIG. 3 is a conceptual view illustrating a state in which the rear head illustrated in FIG. 1 is deformed and supported by the first scroll; FIG.
4 is a cross-sectional view showing an electric compressor according to another embodiment of the present invention.
5 is an enlarged view of the region B shown in FIG. 4.

EMBODIMENT OF THE INVENTION Hereinafter, the electric compressor which concerns on this invention is demonstrated in detail with reference to drawings.

Even if different embodiments, the same or similar reference numerals are given to the same or similar components as the foregoing embodiments, and redundant description thereof will be omitted.

In the following description of the embodiments disclosed herein, when it is determined that the detailed description of the related known technology may obscure the gist of the embodiments disclosed herein, the detailed description thereof will be omitted.

The accompanying drawings are only for easily understanding the embodiments disclosed in the present specification, and the technical idea disclosed in the present specification is not limited by the accompanying drawings, and all changes and equivalents included in the spirit and scope of the present invention are provided. It should be understood to include water or substitutes.

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

The electric compressor according to the present invention may be a scroll compressor in which two scrolls are engaged to compress a refrigerant. The electric compressor according to the present invention may be a component of a refrigeration cycle apparatus for sucking and compressing a refrigerant into a working fluid. In this embodiment, an electric scroll compressor using carbon dioxide (CO ₂ ) as a working fluid will be described as an example. 1 is a cross-sectional view showing an electric compressor 100 according to an embodiment of the present invention.

Referring to FIG. 1, the motor-driven compressor 100 according to an embodiment of the present invention includes a casing 101, a frame, a driving unit 103, and a compression unit 104, and the frame includes a main frame 120 and The subframe 180 may be provided. The overall positional relationship thereof is, for example, the main frame 120 is fixed to the middle of the inner wall of the casing 101, the drive unit 103 for generating a driving force on one side (front) of the main frame 120 is Can be installed. In addition, a compression unit 104 may be installed at the other side (rear) of the main frame 120 to receive the driving force of the driving unit 103 to compress the refrigerant.

In addition, an inverter module for controlling the operation of the compressor may be installed outside the casing 101. The inverter module may be located on the opposite side (front side) of the compression unit 104 relative to the drive unit 103.

As shown in FIG. 1, the casing 101 may include a shell 111, a front head 112, and a rear head 113. The shell 111 has a cylindrical shape in which both ends (front and rear) are open, and may form a suction space S1 therein. In addition, the driving unit 103, the frame and the compression unit 104 may be accommodated in the shell 111.

The front head 112 may be coupled to seal the front end of the shell 111, the inverter module 300 for supplying power and controlling the drive unit 103 to the outside of the front head 112 may be connected. have. In addition, the rear head 113 may be coupled to seal the rear end of the shell 111. As described later, the rear head 113 may form a discharge space S2 in which the refrigerant discharged by compression is accommodated, and may include an oil separator 190.

The suction space S1 may be divided into two spaces by the driving unit 103 accommodated therein. That is, the suction space S1 may include a space formed at the front head 112 side and a space formed at the side close to the rear head 113. The refrigerant is sucked into the space on the front head 112 side and passes through the drive unit 103 to move to the space adjacent to the main frame 120.

The suction pipe 114 may be formed at the front head 112 to connect the refrigerant to the suction space S1. The intake port 114 may be formed to be located at the front end of the drive unit 103 opposite the compression unit 104 with respect to the drive unit 103. In this way, the refrigerant may be introduced into the casing 101 through the inlet 114, and may be sucked into the compression unit 104 after passing the driving unit 103 from the front side to the rear side.

In addition, the rear head 113 may be provided with an exhaust port 115 to which the discharge pipe is connected to guide the refrigerant compressed by the compression unit 104 to the refrigeration cycle. The rear side space of the compression unit 104 closed by the rear head 113 may be a discharge space S2 in which the compressed refrigerant is accommodated. In addition, an oil separator space for communicating the exhaust port 115 and the discharge space S2 with each other and an oil separator 190 installed inside the oil separator space to separate oil from the refrigerant are formed in the rear head 113. Can be.

The drive unit 103 includes a stator 131 and a rotor 132, and serves to drive the rotation shaft 135. In the present embodiment, the stator 131 may be formed in an annular shape to be fixed to the inner circumferential surface of the shell 111 and to form a cylindrical space therein. The rotor 132 may be spaced apart from the stator 131 in the inner space of the stator 131. The rotor 132 may be formed in a substantially cylindrical shape, the rotation axis 135 may be coupled to the center thereof. When power is supplied to the driving unit 103, the rotor 132 and the rotation shaft 135 may be rotated together by the interaction of the stator 131 and the rotor 132.

As shown, the rotating shaft 135 may be accommodated inside the shell 111 and may be rotatably supported by the frame. The rear side of the rotation shaft 135 may be radially supported by the main bearing 161 mounted to the main frame 120. In addition, the front end of the rotating shaft 135 may be radially supported by the sub bearing 162 mounted on the sub frame 180 formed on the inner surface of the front head 112. A portion of the outer circumferential surface of the rotating shaft 135 may be coupled to the rotor 132 to receive the rotational force generated by the driving unit 103.

The compression unit 104 may include a first scroll 140 that is a fixed scroll and a second scroll 150 that is a swing scroll. The second scroll 150 is eccentrically coupled to the rotating shaft 135 coupled to the rotor 132 of the drive unit 103 and pivots with respect to the first scroll 140 while the suction chamber together with the first scroll 140. And a pair of compression chambers P formed of an intermediate pressure chamber and a discharge chamber.

The first scroll 140 may include a first hard plate portion 141 having a disc shape and a first side wall portion 142 protruding toward the main frame 120 on one side of the first hard plate portion 141. Can be. A fixing wrap 143 may be formed at the center of the first hard plate part 141 to protrude from the turning wrap 152 to be described later to form two pairs of compression chambers P.

In addition, a suction port (not shown) communicating with the suction space S1 of the casing 101 is formed at an edge of the first hard plate portion 141, and a discharge space in the final compression chamber in the center of the first hard plate portion 141. A discharge port 144 communicating with S2 may be formed.

The second scroll 150 is formed in a disk shape, the second hard plate portion 151 is formed, and protrudes toward the first hard plate portion 141 on one side of the second hard plate portion 151 to fit with the fixed wrap 143. Swiveling wrap 152 is formed. In addition, the other side of the second hard plate portion 151 may be coupled to the rotating shaft 135 with the eccentric bearing 163 and the balance weight 136 therebetween to receive a rotational force. Here, the balance weight 136 may function to compensate for an imbalance caused by the eccentric movement of the second scroll 150. The balance weight 136 is connected to the rotating shaft 135 to be rotated, and may have a mass distribution eccentric from the center of the rotating shaft 135.

On the other hand, the main frame 120 may be provided with a body portion 121 and the bearing portion 122. The body portion 121 may be formed in a substantially disc shape, and the outer circumferential portion of the body portion 121 may be coupled to and supported by the first side wall portion 142 of the first scroll 140 and the inner surface of the casing 101. The body part 121 may slidably support the second scroll 150, and may include a thrust surface 123 sliding with the second hard plate part 151 of the second scroll 150.

The bearing part 122 may serve to support the rotating shaft 135 through the main bearing 161. The bearing part 122 may be formed to surround the outer circumferential surface of the rotation shaft 135 at the center of the body part 121. The main bearing 161 may be coupled to the bearing portion 122, and the rotation shaft 135 may be rotatably supported by the main bearing 161.

A plurality of pins and recess rings may be installed between the main frame 120 and the second hard plate part 151 to prevent the rotation. In the present exemplary embodiment, annular recess rings may be inserted into a plurality of spaces recessed from one side (front side) of the second hard plate part 151 of the second scroll 150. In addition, a plurality of pins fixed to the body part 121 may be coupled to be seated in the recess ring, and may slide on the inner circumferential surface of the recess ring. When the rotational force of the rotation shaft 135 is transmitted to the second scroll 150, the second scroll 150 may be pivoted relative to the first scroll 140 while the rotation is suppressed by the pin and the recess ring.

On the other hand, the subframe 180 may be formed at a position spaced apart from the main frame 120 to support the other end of the rotation axis 135. The subframe 180 may be fixed to the casing 101, and specifically, may be integrally formed with the front head 112 as in the present embodiment. The subframe 180 may include a boss protruding from the inner surface of the front head 112 to surround the end of the rotation shaft 135. The sub bearing 162 may be inserted between the inner circumferential surface of the boss and the outer circumferential surface of the rotation shaft 135 to support the rotation shaft 135 to be rotatable.

Electric compressor 100 according to the present invention described above is operated as follows.

First, when power is applied to the drive unit 103, the rotation shaft 135 rotates together with the rotor 132 of the drive unit 103 to transmit rotational force to the second scroll 150. Then, the second scroll 150 eccentrically connected to the rotation shaft 135 is rotated by an eccentric distance by the pin and the recess ring, and the compression chamber P is centered in the radial direction of the rotation shaft 135. The volume decreases as it continues to move toward the side.

Accordingly, the refrigerant flows into the suction space S1 through the inlet 114. The refrigerant introduced into the suction space S1 flows into a space adjacent to the main frame 120 through a flow path between the stator 131 and the shell 111 or a gap between the stator 131 and the rotor 132. At this time, the refrigerant may perform cooling of the stator 131 and the rotor 132.

Thereafter, the refrigerant sucked into the compression chamber P is compressed while being moved to the center side along the movement path of the compression chamber P, and is formed between the first scroll 140 and the rear head 113 through the discharge port 144. It is discharged to the discharge space S2.

The refrigerant discharged into the discharge space S2 flows into the oil separation space and passes through the oil separator 190 to separate oil components, and the refrigerant is discharged to the refrigeration cycle apparatus outside the compressor through the exhaust port 115.

On the other hand, when driving the electric compressor 100 according to the present invention, the second scroll 150 to prevent the leakage of the refrigerant compressed in the compression chamber (P) and to reduce the frictional resistance of the thrust surface 123, It is preferable that the pivoting movement is performed by being pressed toward the first scroll 140. Accordingly, the back pressure space S3 may be formed in the main frame 120 to be adjacent to the thrust surface 123. In addition, the oil separated from the oil separator 190 may be introduced and filled through the pressure reducing passage formed to penetrate the first scroll 140 and the main frame 120 to form a back pressure.

In the above described the overall structure and operation of the electric compressor 100 according to the present invention. Hereinafter, the supporting structure and its features between the rear head 113 and the first scroll 140 according to each embodiment of the present invention will be described.

FIG. 2 is an enlarged view of the region A shown in FIG. 1. 1 and 2, the first scroll 140 of the electric compressor 100 according to the embodiment of the present invention further includes a chamfer 145. The chamfer 145 may serve to provide a contact surface through which the first scroll 140 may be supported by the casing 101.

The chamfer 145 may be formed of surfaces inclined with respect to the axial direction and the radial direction of the rotation shaft 135, respectively, and may be made to be supported on the inner surface of the casing 101. Specifically, the chamfer 145 may be formed along the other side (rear side) edge of the first hard plate portion 141. That is, the chamfer 145 may extend in a ring shape along the circumference of the first hard plate portion 141.

In addition, the chamfer 145 may be supported on the inner surface of the rear head 113 among the inner surface of the casing 101. The rear head 113 extends to annularly surround the discharge space S2 and is inclined to correspond to the chamfer portion 145 of the first scroll 140 to support the first scroll 140. ) May be provided. The rear head 113 may be coupled to the shell 111 so that the chamfer portion 145 of the first hard plate portion 141 and the chamfer support portion 113a of the rear head 113 are supported in close contact with each other.

On the other hand, the rear head 113 according to the present embodiment may include a rear side wall 113b extending to abut the end of the shell 111 while forming the chamfer support portion 113a. In particular, at least a portion of the inner circumferential surface of the rear sidewall 113b may be formed to be inclined to correspond to the chamfer 145 of the first scroll 140. As the rear sidewall 113b is formed, portions of the rear head 113 and the first scroll 140 may overlap each other in the axial direction of the rotation shaft 135 as illustrated in FIGS. 1 and 2. That is, a portion of the first scroll 140 may be accommodated in the annular rear sidewall 113b.

In addition, the rear head 113 and the first hard plate portion 141 of the present embodiment extend along the circumference of the discharge space S2 on the surfaces facing each other, and are pressurized by the surfaces facing each other to discharge the discharge space S2. It may be further provided with a sealing portion (113c, 146) formed to seal the. The sealing portions 113c and 146 may include a groove recessed in an annular shape and an annular ring member inserted into the groove. As in the present exemplary embodiment, one sealing part 146 may be formed in the first hard plate part 141, and one sealing part 113c may be further added to the rear head 113 with a larger diameter.

3 is a conceptual view illustrating a state in which the rear head 113 illustrated in FIG. 1 is supported by the first scroll 140 while being deformed. The motor-driven compressor 100 according to the present invention has the effect that the first scroll 140 can be stably supported on the inner surface of the casing 101. When the refrigerant having a high temperature and high pressure in the compression chamber P fills the discharge space S2, the rear head 113 may expand and deform due to the temperature and pressure of the refrigerant. In particular, the amount of deformation may be large in the inner surface of the discharge groove 113d forming the discharge space S2 by recessing the rear head 113 facing the surface of the first hard plate portion 141.

FIG. 3 conceptually illustrates a deformation of the rear head 113. The rear head is formed in a direction in which the inner surface of the discharge groove 113d forming the discharge space S2 is pushed in the axial direction and the radial direction of the rotation axis 135. 113 may occur. As described above, when the discharge groove 113d formed at the center of the rear head 113 receives a force in the other direction (rear), the chamfer support portion 113a and the rear sidewall 113b supported by the first scroll 140 are relatively. ) Is subjected to a force bending in one direction (front) and the inside of the casing (101). Accordingly, the chamfer 145 of the first scroll 140 may receive a force by the chamfer support part 113a. That is, the first scroll 140 may receive the supporting force in the direction inclined in the axial direction and the radial direction so as to be supported both in the axial direction and the radial direction of the rotation shaft 135.

Therefore, in the motor-driven compressor 100 of the present invention, the first scroll 140, which functions as a fixed scroll during the operation of the compressor, may be supported in the casing 101 where the deformation occurs, and thus may be stably positioned. When the first scroll 140 is stably supported, vibration and noise during operation of the compressor may be reduced. In addition, since the sealing of the compression chamber P formed between the second scroll and the first scroll 140 can be further ensured, reliability can be ensured.

4 is a cross-sectional view of an electric compressor 200 according to another embodiment of the present invention, and FIG. 5 is an enlarged view of the region B shown in FIG. 4. Hereinafter, another embodiment in which the first scroll 140 may be supported by the rear head 213 in a direction other than the axial direction of the rotation shaft 135 will be described with reference to FIGS. 4 and 5.

In the motor-driven compressor 200 according to another embodiment of the present invention, the rotary shaft 135, the drive unit 103, and the compression unit 104 are accommodated inside the casing 101 as in the present embodiment. The casing 101 includes a rear head 213 formed to overlap the first scroll 140. The rear head 213 may cover the first scroll 140 from the rear to form the discharge space (S2).

That is, the rear head 213 may include a discharge groove 213d recessed in a surface facing the first scroll 140 to form a discharge space S2 for receiving refrigerant compressed in the compression chamber P. Can be. In addition, the rear head 213 may further include a rear side wall 213b extending to surround the discharge groove 213d. In this case, the rear sidewall 213b may be formed to support the first scroll 140 in the axial direction and the radial direction of the rotation shaft 135.

In detail, the rear sidewall 213b may include first and second support portions 213b1 and 213b2. The first support part 213b1 may extend to be adjacent to the discharge groove 213d and may be supported on the other side (rear face) of the first hard plate part 141. The second support part 213b2 may extend to surround the first support part 213b1, and may be formed to be supported on an outer circumferential surface of the first hard plate part 141. That is, the first support part 213b1 supports the first scroll 140 in the axial direction of the rotation axis 135, and the second support part 213b2 supports the first scroll 140 in the radial direction of the rotation axis 135. can do.

In addition, the rear sidewall 213b may further include a chamfer support part 213a. The chamfer support part 213a extends in an annular shape so as to connect between the first support part 213b1 and the second support part 213b2, and may be inclined in the axial direction and the radial direction of the rotation shaft 135. The first hard plate portion 141 of the first scroll 140 is formed with a chamfer portion 145 which is in surface contact with the chamfer support portion 213a, so that the chamfer support portion 213a and the chamfer portion 145 may be supported on each other. Can be.

Similar to the previous embodiment, the rear head 213 of the present embodiment may be deformed by the high temperature and high pressure refrigerant contained in the discharge space S2. In addition, when the rear head 213 is deformed, the rear side wall 213b may be subjected to a force that is bent forward and inwardly into the casing 101. Accordingly, the first scroll 140 may be supported in the axial direction and the radial direction of the rotation shaft 135 by the deformed rear head 213.

In the motor-driven compressor 200 according to the present embodiment, since the rear head 213 forming the discharge space S2 is supported by the first scroll 140 in the axial direction and the radial direction of the rotation shaft 135, the compressor is in operation. The first scroll 140 may maintain a stable position. Even if the rear head 213 is expanded or deformed due to the high temperature and high pressure environment formed in the discharge space S2, the rear head 213 can maintain a state in which the first scroll 140 is pressurized, thereby ensuring stability of the compressor and Reliability can be improved.

What has been described above are only embodiments for implementing the electric compressor according to the present invention, and the present invention is not limited to the above embodiments, and does not depart from the gist of the present invention as claimed in the following claims. Anyone with ordinary knowledge in the field to which the present invention belongs will have the technical idea of the present invention to the extent that various modifications can be made.

S1: suction space S2: discharge space
S3: Back pressure space P: Compression chamber
100, 200: electric compressor 101: casing
103: drive unit 104: compression unit
111: shell 112: front head
113,213: rear head 113a, 213a: chamfer support part
113b, 213b: rear side wall 113c: sealing portion
113d, 213d: Discharge groove 114: Intake vent
115: exhaust port 120: main frame
121: body portion 122: bearing part
123: thrust surface 131: stator
132: rotor 135: axis of rotation
136: balance weight 140: first scroll
141: first light plate portion 142: first side wall portion
143: fixed wrap 144: discharge port
145: chamfer portion 146: sealing portion
150: second scroll 151: second hard plate portion
152: swivel wrap 161: main bearing
162: sub bearing 163: eccentric bearing
180: subframe 190: oil separator
213b1: first support 213b2: second support
300: inverter module

Claims (8)

Casing;
A rotating shaft accommodated in the casing;
A drive unit configured to rotate the rotating shaft; And
A compression unit having a first scroll configured to be fixed to the casing, and a second scroll connected to the rotational shaft to pivot with the first scroll to form a compression chamber in which a volume is changed,
The first scroll is an electric compressor having a chamfer formed to be inclined with respect to the axial direction and the radial direction of the rotating shaft to be supported on the inner surface of the casing. The method of claim 1,
The first scroll may include a first hard plate part having a disk shape having one side forming the compression chamber and the other side forming a discharge space for receiving the refrigerant compressed in the compression chamber.
The chamfer portion is an electric compressor, characterized in that formed along the other edge of the first hard plate portion. The method of claim 2,
The casing includes a rear head overlapping the other side of the first hard plate portion to form the discharge space,
And the rear head includes a chamfer support part extending to surround the discharge space and inclined to correspond to the chamfer part to support the first scroll. The method of claim 2,
The casing is,
A shell extending in a cylindrical shape and having a portion of an inner circumferential surface thereof facing an outer circumferential surface of the first hard plate portion; And
A rear head configured to overlap an end portion of the shell to form the discharge space,
And the rear head has a rear sidewall coupled to an end of the shell and formed to be inclined such that at least a portion of an inner circumferential surface thereof corresponds to the chamfer portion. The method of claim 2,
And the first scroll further comprises a sealing part formed on the other side of the first hard plate part to extend along the circumference of the discharge space and pressurized by the casing to seal the discharge space. Casing;
A rotating shaft accommodated in the casing;
A drive unit configured to rotate the rotating shaft; And
A compression unit having a first scroll configured to be fixed to the casing, and a second scroll connected to the rotational shaft to pivot with the first scroll to form a compression chamber in which a volume is changed,
The casing includes a rear head configured to overlap the first scroll,
The rear head is
A discharge groove formed to be recessed in a surface facing the first scroll to form a discharge space accommodating the refrigerant compressed in the compression chamber; And
And a rear sidewall extending to enclose the discharge groove and formed to support the first scroll in the axial direction and the radial direction of the rotation shaft. The method of claim 6,
The first scroll may include a first hard plate part having a disk shape having one side forming the compression chamber and the other side forming a discharge space for receiving the refrigerant compressed in the compression chamber.
The rear side wall,
A first support part extending to be adjacent to the discharge groove and supported to the other side of the first hard plate part; And
And a second support portion extending to surround the first support portion and supported on an outer circumferential surface of the first hard plate portion. The method of claim 7, wherein
The rear side wall further includes a chamfer support part extending to connect between the first support part and the second support part and inclined in an axial direction and a radial direction of the rotation shaft,
The first scroll further comprises a chamfer portion extending along the other edge of the first hard plate portion and in contact with the chamfer support portion.

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