KR102162740B1 - Motor operated compressor - Google Patents

Abstract

The present invention relates to an electric compressor. The electric compressor of the present invention comprises: a compression module configured to compress a fluid to be compressed by an orbiting motion of a scroll; an inverter module configured to control driving of the compression module; a main housing formed to surround a mechanical component provided in the compression module and having an intake port for drawing in the fluid to be compressed; an inverter cover which forms a boundary between the compression module and the inverter module, and is disposed to be exposed to the fluid to be compressed flowing into the compression module through the intake port; and a plurality of guide protrusions protruding from the inverter cover toward an inner space of the main housing to guide the fluid to be compressed flowing through the intake port along the surface of the inverter cover, and formed along the direction from the intake port toward the opposite side of the intake port. Accordingly, a structure capable of cooling circuit components of the inverter module, etc. only with components originally provided in the electric compressor can be provided.

Description

Electric compressor {MOTOR OPERATED COMPRESSOR}

The present invention relates to an electric compressor driven by a motor.

Compressors are classified into a mechanical type with an engine as a driving source and an electric type with a motor as a driving source.

As an electric compressor, a scroll compression method suitable for high compression ratio operation is widely known. An electric part composed of a drive motor is installed inside the sealed casing of an electric compressor having a scroll compression method (hereinafter, abbreviated as an electric compressor in this specification). And a compression unit consisting of a fixed scroll and an orbiting scroll is installed on one side of the electric unit. The electric part and the compression part are connected to the rotating shaft. The rotational force of the electric unit is transmitted to the compression unit through the rotating shaft. In addition, the compression unit compresses fluid such as a refrigerant by the rotational force transmitted through the rotation shaft.

The driving of the motor provided in the electric compressor is controlled by the inverter module. Circuit components such as elements provided in the inverter module inevitably generate heat as they operate by receiving power. In addition, when the discharge temperature of the fluid to be compressed increases, heat of the discharged fluid is transferred to the circuit parts of the inverter module through the parts constituting the electric compressor.

The higher the temperature of circuit components included in the inverter module, the lower the efficiency of the inverter module. Since it is difficult to prevent the efficiency of the inverter module from deteriorating with only natural cooling, the temperature of circuit components must be lowered through more active cooling to improve the efficiency of the inverter module.

Korean Patent Publication No. 10-1182661 (2012.09.07.) discloses a cooling fan device for an inverter power module. The above patent document discloses a structure for cooling an inverter using a cooling fan and a cooling fin. When the device disclosed in the above patent document is used, it is possible to expect an improvement in the efficiency of the inverter module through a cooling effect beyond natural cooling.

However, due to the autonomous volume of the apparatus disclosed in the patent document, the volume of the compressor naturally increases, and an increase in the manufacturing cost of the compressor is inevitable. Furthermore, since the cooling fan consumes power supplied to the compressor, the effect of improving efficiency through cooling of circuit components is canceled out.

In addition, since it is impossible to guide the wind direction in a desired direction by using the cooling fin disclosed in the above patent document, it is difficult to cool a circuit component in which heat is concentrated.

Further, with the structure disclosed in the above patent document, a desired degree of cooling cannot be set.

One object of the present invention is to propose a structure capable of cooling circuit components of an inverter module, etc. only with components originally provided in an electric compressor without adding a separate device such as a cooling fan or cooling fin.

Another object of the present invention is to provide an electric compressor having a structure capable of cooling circuit components of an inverter module without consuming power.

Another object of the present invention is to provide a structure capable of cooling a circuit component in which heat is concentrated by guiding a cooling fluid in a desired direction.

Another object of the present invention is to propose a structure capable of setting the degree of cooling of circuit components according to a designer's wish.

Another object of the present invention is to provide an electric compressor capable of additionally obtaining an effect of reinforcing rigidity of an inverter cover by using a component for cooling circuit components.

In order to achieve such an object of the present invention, an electric compressor according to an embodiment of the present invention includes a plurality of guide projections formed at the boundary between the compression module and the main inverter module.

The plurality of guide protrusions protrude from the boundary between the compression module and the inverter module toward the inner space of the compression module.

The compression module is formed to compress a fluid to be compressed by a rotational motion of a scroll, and the inverter module is formed to control driving of the compression module.

The compression module includes a main housing, and the main housing is formed to surround a mechanical component provided in the compression module, and includes an intake port for sucking a fluid to be compressed.

The inverter module includes an inverter cover, and the inverter cover forms a boundary between the compression module and the inverter module, and is disposed to be exposed to a fluid to be compressed that flows into the compression module through the intake port.

The plurality of guide protrusions protrude from the inverter cover toward the inner space of the main housing to guide the fluid to be compressed flowing through the intake port along the surface of the inverter cover. Further, the plurality of guide protrusions are formed along a direction from the intake port toward the opposite side of the inlet port. The direction toward the opposite side of the intake port is based on the radial direction of the main housing.

A contact area between the inverter cover and the fluid to be compressed is defined by an open end of the main housing, and an opposite side of the intake port indicates a position opposite to the intake port with respect to the plurality of guide protrusions within the contact area, and the The plurality of guide protrusions are spaced apart from each other to form a continuous flow path extending from the intake port to the opposite side of the intake port therebetween.

The inverter cover is provided with a rotation shaft support portion protruding from the surface of the inverter cover, and the plurality of guide projections are radially arranged around the rotation shaft support portion.

The plurality of guide protrusions are formed along an imaginary concentric circle centered on the rotation shaft support part, and are arranged to be spaced apart from each other in a circumferential direction of the concentric circle and a radial direction of the rotation shaft support part.

Among the virtual concentric circles, a plurality of guide protrusions arranged along a first concentric circle relatively close to the rotation shaft support are arranged to be spaced apart from each other at a first interval along the circumference of the first concentric circle, and the rotation shaft of the virtual concentric circles A plurality of guide protrusions arranged along a second concentric circle relatively far from the support portion are arranged to be spaced apart from each other at a second interval along the circumference of the second concentric circle, and the first interval is smaller than the second interval.

The inverter cover has a rotation shaft support portion protruding from the surface of the inverter cover, the plurality of guide projections are formed in a virtual circle centered on the rotation shaft support portion, and adjacent guide projections are arranged at equal intervals in all directions. do.

The inverter cover is formed with a rotation shaft support protruding from the surface of the inverter cover,

The plurality of guide protrusions may include a plurality of first guide protrusions extending along an imaginary circle centered on the rotation shaft support and arranged to be spaced apart from each other; A second guide protrusion extending toward the intake port from one of the plurality of first guide protrusions; And a third guide protrusion extending from the other one of the plurality of first guide protrusions toward the opposite side of the intake port.

The plurality of first guide protrusions extend along a virtual concentric circle centered on the rotation shaft support part, and are arranged to be spaced apart from each other.

The second guide protrusions are formed in plural, extend along imaginary straight lines passing through the rotational shaft support in parallel with each other, and the third guide protrusions are formed in plural, and virtually each other passing through the rotational shaft support in parallel with each other. It extends along straight lines.

Among the plurality of first guide protrusions, those extending along different virtual concentric circles are arranged to be spaced apart from each other in the radial direction of the rotation shaft support.

The virtual concentric circle may include a first concentric circle located relatively close to the rotation shaft support portion; A second concentric circle located farther from the rotation shaft support than the first concentric circle; And a third concentric circle at a position farther from the rotation shaft support than the second concentric circle, a plurality of first guide protrusions arranged along the first concentric circle, and a plurality of first guide protrusions arranged along the second concentric circle A plurality of first guide protrusions arranged to be spaced apart from each other at a first interval in the radial direction of the rotation shaft support part and arranged along the second concentric circle, and a plurality of first guide protrusions arranged along the third concentric circle are the rotation shaft They are arranged to be spaced apart from each other at a second interval in the radial direction of the support, and the first interval is smaller than the second interval.

The plurality of guide protrusions further include a fourth guide protrusion, and the fourth guide protrusion is along the radial direction of the rotation shaft support so as to connect the plurality of first guide protrusions extending along different virtual concentric circles. Is extended.

In the inverter cover, a rotation shaft support part protruding in an annular shape from the surface of the inverter cover is formed, and at least one hole is formed in the side of the rotation shaft support part through which the inside and the outside of the annular shape communicate with each other, and the plurality of guide projections It is formed both at a position corresponding to the inside of the annular shape and a position corresponding to the outside of the annular shape.

The plurality of guide protrusions are formed integrally with the inverter cover by processing the surface of the inverter cover.

The electric compressor further includes a cover plate formed to cover the plurality of guide protrusions, and the cover plate is in close contact with the plurality of guide protrusions and is disposed to be spaced apart from the surface of the inverter cover.

A plurality of cover protrusions having a shape corresponding to the plurality of guide protrusions are formed on the cover plate, and the plurality of cover protrusions protrude toward the plurality of guide protrusions.

The electric compressor further includes a protrusion forming plate made of a thermally conductive material that is in close contact with the surface of the inverter cover, and the plurality of guide protrusions are formed on the protrusion forming plate.

According to the present invention having the configuration as described above, a plurality of guide protrusions can be formed on an inverter cover originally provided in an electric compressor and used for cooling circuit components, without adding a separate device for heat dissipation. In particular, the plurality of guide protrusions guide the flow of the refrigerant to be compressed flowing through the intake port to the opposite side of the intake port, thereby inducing a sufficient cooling effect.

According to the present invention, circuit components of an inverter module can be naturally cooled through heat exchange between a low-temperature compressed refrigerant and an inverter cover without consuming power required for driving a cooling fan. In particular, the plurality of guide protrusions guide the flow of the fluid to be compressed, and the plurality of guide protrusions themselves increase the heat exchange area to improve the cooling effect.

According to the present invention, it is possible to concentrate the cooling effect on a specific area of the inverter cover by designing a flow path formed by a plurality of guide protrusions according to a designer's desire. For example, if a flow path is designed so that the refrigerant to be compressed is concentrated in a region where the inverter cover and the heat sink are in direct contact, the cooling effect through the heat sink may be further increased.

In addition, according to the present invention, as a plurality of guide protrusions are formed on the inverter cover, an effect of reinforcing rigidity may be additionally obtained, such as preventing deformation or damage of the inverter cover.

In addition, according to the present invention, it is possible to temporarily confine the fluid to be compressed in a region in contact with the inverter cover with the cover plate, thereby obtaining a greater cooling effect.

1 is a perspective view showing an example of an electric compressor proposed in the present invention.
FIG. 2 is an exploded perspective view of the electric compressor shown in FIG. 1 by separating the compression module and the inverter module.
3 is an exploded perspective view of an inverter module related to the first embodiment of the present invention.
4 is a cross-sectional view of the inverter module shown in FIG. 3.
5 is a conceptual diagram of the inverter module and the main housing shown in FIG. 3 as viewed from the rear side of the electric compressor.
6 is a front view of an inverter cover related to a second embodiment of the present invention.
7 is a front view of an inverter cover according to a third embodiment of the present invention.
8 is an exploded perspective view of an inverter module related to a fourth embodiment of the present invention.
9 is a cross-sectional view of the inverter module shown in FIG. 8.
10 is a conceptual diagram of the inverter module and the main housing shown in FIG. 8 as viewed from the rear side of the electric compressor.
11 is an exploded perspective view of an inverter module according to a fifth embodiment of the present invention.
12 is a cross-sectional view of the inverter module shown in FIG. 11.

Hereinafter, an electric compressor according to the present invention will be described in more detail with reference to the drawings.

In the present specification, the same or similar reference numerals are assigned to the same and similar configurations even in different embodiments, and the description is replaced with the first description.

When a component is referred to as being "connected" or "connected" to another component, it is understood that it may be directly connected or connected to the other component, but other components may exist in the middle. Should be. On the other hand, when a component is referred to as being "directly connected" or "directly connected" to another component, it should be understood that there is no other component in the middle.

Singular expressions used in the present specification include plural expressions unless the context clearly indicates otherwise.

1 is a perspective view showing an example of an electric compressor proposed in the present invention.

The electric compressor 1000 includes a compression module 1100 and an inverter module 1200.

The compression module 1100 refers to a set of components for compressing a fluid such as a refrigerant. The inverter module 1200 refers to a set of components for controlling the driving of the compression module 1100. The inverter module 1200 may be coupled to one side of the compression module 1100. If the direction is set based on the flow of the fluid compressed by the electric compressor 1000, one side of the compression module 1100 refers to the front side of the compression module 1100. Since the fluid to be compressed is introduced into the intake port 1111 and discharged through the discharge port 1121, the inverter module 1200 disposed close to the intake port 1111 may be described as being coupled to the front side of the compression module 1100.

The compression module 1100 is formed to compress a fluid to be compressed by a rotational motion of a compression unit (not shown) composed of a fixed scroll (not shown) and an orbiting scroll (not shown). The exterior of the compression module 1100 may be formed by the main housing 1110 and the rear housing 1120.

The main housing 1110 is formed to enclose a mechanical component provided in the compression module 1100. Here, the mechanical parts refer to parts constituting a driving part, a compression part, and the like. The main housing 1110 has a hollow cylinder, a polygonal column, or an appearance equivalent thereto. The main housing 1110 may be disposed to extend in the transverse direction.

Both ends of the main housing 1110 may be all or partially open. For example, the front end of the main housing 1110 may be entirely open, and the rear end of the main housing 1110 may be partially opened. Here, the front end of the housing 1110 refers to an end coupled to the inverter module 1200. In addition, the rear end of the housing 1110 refers to an end coupled to the rear housing 1120.

The inner and outer diameters of the main housing 1110 may not be constant. For example, as shown in FIG. 1, the front end and the rear end may have an outer diameter larger than that of an intermediate portion between the front end and the rear end.

An intake port 1111 and a mount portion 1112 are formed on the outer peripheral surface of the main housing 1110.

The intake port 1111 forms a flow path for supplying the fluid to be compressed to the internal space of the electric compressor 1000. The intake port 1111 may protrude from the outer peripheral surface of the main housing 1110. The intake port 1111 may be connected to a suction pipe (not shown) that supplies a fluid to be compressed to the electric compressor 1000. The intake port 1111 has a shape corresponding to the suction pipe so as to be coupled to the suction pipe.

The mount unit 1112 is a configuration for fixing the electric compressor 1000 to an installation target area. The mount portion 1112 may protrude from the outer peripheral surface of the main housing 1110. The mount part 1112 may protrude along the circumferential direction of the main housing 1110. The mount portion 1112 may extend along a tangential direction of the outer peripheral surface of the main housing 1110.

The mount portion 1112 may include a fastening member coupling hole 1112a that can be coupled to an arbitrary fastening member. The fastening member coupling hole 1112a may be opened toward a tangential direction of the outer peripheral surface of the main housing 1110. The mount portion 1112 may be formed on one side and the other side of the main housing 1110, respectively. For example, in FIG. 1, the mount portions 1112 are formed on the left and right sides or upper and lower sides of the main housing 1110, respectively.

The rear housing 1120 is disposed on the other side of the main housing 1110 or on the rear side of the main housing 1110. The rear housing 1120 may be formed to cover the rear end of the main housing 1110.

The rear housing 1120 includes a discharge port 1121 and a mount portion 1122.

The discharge port 1121 forms a flow path for discharging the fluid compressed by the electric compressor 1000 to the outside. The discharge port 1121 may protrude from the outer peripheral surface of the rear housing 1120. The discharge port 1121 may be connected to a discharge pipe (not shown) that supplies the compressed fluid to the downstream device of the refrigeration cycle. The discharge port 1121 has a shape corresponding to the discharge pipe so as to be coupled to the discharge pipe.

The mount portion 1122 is formed on the rear outer surface of the rear housing 110. The mount part 1122 may protrude from an outer surface of the rear side of the rear housing 110. The mount part 1122 may extend in the vertical direction. A fastening member coupling hole 1122a is formed in the mount part 1122. The mount portion 1122 serves substantially the same as the mount portion 1112 of the main housing 1110.

The main housing 1110 and the rear housing 1120 may be coupled to each other by a plurality of fastening members 1123. The fastening member 1123 is inserted from the rear housing 1120 side toward the main housing 1110 side. A plurality of fastening members 1123 may be installed along the circumference of the rear housing 1120.

A relief valve 1124 is installed in the rear housing 1120. The relief valve 1124 is formed to open above the reference pressure. The relief valve 1124 is for preventing the high-pressure fluid from flowing into the interior of the vehicle through the discharge port 1121 under abnormal conditions. When an abnormal situation such as an accident occurs in a vehicle equipped with the electric compressor 1000 and the inside of the electric compressor 1000 is overpressured above the reference pressure, the relief valve 1124 is opened. When the relief valve 1124 is opened, a high-pressure fluid is discharged to the outside of the electric compressor 1000 through the relief valve 1124.

Next, the inverter module 1200 will be described.

The exterior of the inverter module 1200 is formed by the inverter housing 1210 and the inverter cover 1220.

The inverter housing 1210 and the inverter cover 1220 are coupled to each other and provide a space for mounting circuit components and the like.

The inverter housing 1210 is disposed at the front end of the electric compressor 1000. One surface of the inverter housing 1210 is disposed to face the front of the electric compressor 1000 and forms an outer wall of the electric compressor 1000. The inverter housing 1210 has a side wall, and the side wall protrudes toward the inverter cover 1220 along an edge of the one surface. The inverter housing 1210 may have an outer peripheral surface larger than the outer peripheral surface of the main housing 1110.

The inverter cover 1220 is coupled to the inverter housing 1210. The inverter cover 1220 may be formed in a plate shape covering the opening of the inverter housing 1210 and the front end of the main housing 1110. An edge of the inverter cover 1220 may have a shape corresponding to a sidewall of the inverter housing 1210.

The inverter housing 1210 and the inverter cover 1220 are coupled to each other by a plurality of fastening members 1215. A plurality of fastening member accommodating grooves 1214 for accommodating the fastening member 1215 may be formed in the inverter housing 1210. The plurality of fastening members 1215 are inserted from the inverter housing 1210 side toward the inverter cover 1220 side. The plurality of fastening members 1215 are installed at positions spaced apart from each other along the circumference of the inverter housing 1210. As the inverter cover 1220 is coupled to the inverter housing 1210, the inverter module 1200 has an internal space.

The edge of the inverter cover 1220 is coupled to the inverter housing 1210, and one surface of the inverter cover 1220 is coupled to the main housing 1110.

The inverter cover 1220 is provided with a power connector 1241 and a communication connector 1242. The power connector 1241 and the communication connector 1242 are formed to be connectable to different mating connectors (not shown), respectively. The power connector 1241 is formed to transmit power supplied from the mating connector to circuit components or the like. The communication connector 1242 electrically transmits a control command or the like transmitted from the outside to a circuit component or the like so that the electric compressor 1000 is driven according to the control command.

Hereinafter, the internal structure of the electric compressor 1000 will be described.

FIG. 2 is an exploded perspective view of the electric compressor 1000 shown in FIG. 1 by separating the compression module 1100 and the inverter module 1200.

When the compression module 1100 and the inverter module 1200 are separated from each other, the motor chamber S1 is exposed through the front end 1110a of the main housing 1110. The motor room S1 means a space in which the drive motor 1130 is installed.

The motor chamber S1 is formed by coupling the main housing 1110 and the inverter cover 1220. A sealing member such as an O-ring may be installed along the coupling position of the main housing 1110 and the inverter cover 1220 to seal the motor chamber S1.

The drive motor 1130 is installed in the motor chamber S1. The drive motor 1130 includes a stator 1131 and a rotor 1132.

The stator 1131 is installed along the inner circumferential surface of the main housing 1110 and is fixed to the inner circumferential surface of the main housing 1110. The stator 1131 is inserted and fixed to the main housing 1110 by shrink fit (or hot press fit). Therefore, setting the insertion depth of the stator 1131 inserted into the main housing 1110 to be small (or shallow) is advantageous in securing the ease of assembly work of the stator 1131. Furthermore, setting the insertion depth of the stator 1131 to be small is advantageous in maintaining the concentricity of the stator 1131 during the shrink fit process.

The rotor 1132 is installed in an area surrounded by the stator 1131. The rotor 1132 is rotated by electromagnetic interaction with the stator 1131.

The rotation shaft 1140 is coupled to the center of the rotor 1132. The rotation shaft 1140 rotates together with the rotor 1132 and transmits a rotational force generated by the drive motor 1130 to a compression unit to be described later. The rotation shaft 1140 is inserted and fixed to the rotor 1132 by shrink fit (or hot press fit).

The inverter cover 1220 and the main housing 1110 are coupled by a plurality of fastening members 1221. The plurality of fastening members 1221 pass through the holes formed in the inverter cover 1220 from the first surface to the second surface, and protrude toward the main housing 1110. The plurality of fastening members 1221 are coupled to the front end 1110a of the main housing 1110. The plurality of fastening members 1221 are disposed at positions spaced apart from each other along a curve corresponding to the edge of the front end 1110a.

An area surrounded by the plurality of fastening members 1221 is present on the outer surface of the inverter cover 1220. The area surrounded by the plurality of fastening members 1221 covers the front opening of the main housing 1110.

A rotation shaft support part 1222 for supporting the rotation shaft 1140 of the compression module 1100 in the axial direction may be formed at the center of the area surrounded by the plurality of fastening members 1221. The rotation shaft support part 1222 protrudes from the rear outer surface of the inverter cover 1220 and may be formed to surround the end of the rotation shaft 1140.

When a fluid such as a refrigerant is compressed in the compression module 1100, the rotating shaft 1140 receives a force toward the inverter module 1200 along the axial direction due to the high pressure. When the rotation shaft support part 1222 supports the rotation shaft 1140 in the axial direction, it is possible to prevent the rotation shaft 1140 from being pushed toward the inverter module 1200.

A three-phase airtight terminal 1260 is exposed on one side of the rotation shaft support 1222. The three-phase airtight terminal 1260 is electrically connected to the driving motor 1130 driven by the UVW three-phase, and transmits power and electrical control commands from the inverter module 1200 to the driving motor 1130.

The inverter cover 1220 forms a boundary between the compression module 1100 and the inverter module 1200. One surface of the inverter cover 1220 is exposed to the motor chamber S1. The intake port 1111 provided in the main housing 1110 is formed to communicate with the outside of the electric compressor 1000 and the motor chamber S1, and the fluid to be compressed is introduced into the motor chamber S1 through the intake port 1111. , One surface of the inverter cover 1220 is exposed to a fluid to be compressed.

When the electric compressor 1000 is operated, the inverter cover 1220 becomes relatively high temperature by receiving heat generated from circuit components in the inverter module 1200 and heat according to an increase in the discharge temperature of the fluid to be compressed. In contrast, the fluid to be compressed that flows into the motor chamber S1 through the intake port 1111 is relatively low temperature. Accordingly, when the inverter cover 1220 is exposed to the compression target fluid, the inverter cover 1220 may be cooled by the compression target fluid.

A plurality of guide protrusions 1223 are formed on the inverter cover 1220. The plurality of guide protrusions 1223 are for further enhancing the cooling effect of the inverter cover 1220 by the fluid to be compressed. In particular, since the intake port 1111 is formed on one side of the main housing 1110, the cooling effect may be reduced at a location far from the intake port 1111, but the plurality of guide protrusions 1223 induce the flow of the fluid to be compressed to cool it. This is a configuration to prevent the effect from being reduced.

A more detailed description of the plurality of guide protrusions 1223 will be described later with reference to the accompanying drawings in FIG. 3.

3 to 5 are views showing the electric compressor 1000 of the first embodiment provided by the present invention.

3 is an exploded perspective view of the inverter module 1200 according to the first embodiment of the present invention.

4 is a cross-sectional view of the inverter module 1200 illustrated in FIG. 3.

5 is a conceptual diagram of the inverter module 1200 and the main housing 1110 shown in FIG. 3 viewed from the rear side of the electric compressor 1000.

The inverter module 1200 includes an inverter housing 1210, an inverter cover 1220, a circuit component 1230, a connector 1241, 1242, a printed circuit board 1251, a power element 1270, a heat sink 1280, and the like. Include.

Here, the circuit component 1230 refers to various electric components that are mounted on the printed circuit board 1251, such as capacitors and switching elements, to perform electrical functions.

The communication connector 1242 is partially inserted into the inverter module 1200 through the inverter cover 1220. The portion 1242a inserted into the inverter module 1200 is electrically connected to the printed circuit board 1251. The communication connector 1242 is fixed to the inverter cover 1220 by a fastening member 1242b. This description can be applied equally to the power connector 1241.

The printed circuit board 1251 is mounted inside the inverter module 1200. A plurality of electrical elements are mounted on the printed circuit board 1251. In particular, a power element 1270 is mounted on the printed circuit board 1251, and the power element 1270 is electrically connected to the driving motor 1130 by a three-phase airtight terminal 1260 described in FIG. 2.

The printed circuit board 1251 is fixed by the annular printed circuit board support 1252 and the fastening member 1253. In order to maintain the functions of the circuit components 1230 mounted on the printed circuit board 1251, the printed circuit board 1251 must be fixed in one position within the inverter module 1200. In particular, the printed circuit board 1251 and the inverter The distance between the covers 1220 should be kept constant.

For example, a heat sink 1280 is disposed between the power element 1270 and the inverter cover 1220, which will be described later, to cool the power element 1270. The distance between the printed circuit board 1251 and the inverter cover 1220 is If fluctuates, the heat conduction function of the heat sink 1280 is inevitably deteriorated. The printed circuit board support part 1252 not only supports the printed circuit board 1251 by fixing the printed circuit board 1251 in one position, but also serves to maintain a constant distance from the inverter cover 1220.

A plurality of bushes 1252a protrude toward the inverter cover 1220 and the printed circuit board 1251 around the printed circuit board support portion 1252 corresponding to the outer portion of the ring. The plurality of bushes 1252a may be alternately arranged with a fastening member 1215 for coupling the inverter cover 1220 and the main housing 1110.

One side of the printed circuit board 1251 is in close contact with the bush 1252a, and the fastening member 1253 is fastened to the bush 1252a on the other side of the printed circuit board 1251.

Since the printed circuit board support part 1252 is formed in an annular shape, circuit components 1230 including the power element 1270 may be mounted on the printed circuit board 1251 inside and outside the ring.

The power element 1270 is a component included in the inverter module 1200 and provides power to the driving motor 1130 and controls the operation of the driving motor 1130. The power device 1270 is provided on a conductive pin 1271, and the conductive pin 1271 is electrically connected to the printed circuit board 1251 and the three-phase airtight terminal 1260.

The heat sink 1280 is formed of a thermally conductive material, and is disposed between the power element 1270 and the inverter cover 1220. Since one surface of the inverter cover 1220 is exposed to the fluid to be compressed, when the heat sink 1280 is disposed between the other surface of the inverter cover 1220 and the power element 1270, heat generated from the power element 1270 is transferred to the inverter. The power element 1270 may be cooled by conducting the cover 1220.

The heat sink 1280 includes bushes 1281 for coupling with the inverter cover 1220 on both sides. When the fastening member 1282 is inserted into the bush 1281 and fastened to the inverter cover 1220, the heat sink 1280 is also coupled to the inverter cover 1220.

As described above, since heat generated from the power element 1270 is transferred to the inverter cover 1220 through the heat sink 1280, cooling the inverter cover 1220 ultimately lowers the temperature of the power element 1270, the inverter module Efficiency improvement of 1200 can be expected. In order to increase the cooling effect of the inverter cover 1220 by the fluid to be compressed, a structure for improving the contact opportunity between the fluid to be compressed and the inverter cover 1220 is required. The structure to improve the chance of contact between the fluid to be compressed and the inverter cover 1220 means a structure capable of guiding the flow of the fluid to be compressed flowing from one side of the main housing 1110 to the opposite side of the intake port 1111 do.

The plurality of guide protrusions 1223 form a structure capable of guiding the flow of the fluid to be compressed from the intake port 1111 to the opposite side of the intake port 1111. Here, the opposite side of the intake port 1111 refers to a plurality of guide protrusions 1223 (or rotation shaft support part 1222) within the contact area between the inverter cover 1220 and the fluid to be compressed, defined by the main housing 1110. The opposite position of the intake port 1111 is indicated.

The plurality of guide protrusions 1223 protrude from the inverter cover 1220 toward the inner space of the main housing 1110 so that the fluid to be compressed flowing through the intake port 1111 flows along the surface of the inverter cover 1220. . The plurality of guide protrusions 1223 may protrude in a hemisphere shape. The internal space of the main housing 1110 means the motor chamber S1. The protruding direction of the guide protrusion 1223 is a direction from the front to the rear of the electric compressor 1000.

Since the intake port 1111 is formed at a position close to the front end (open end) of the main housing 1110, one surface of the inverter cover 1220 coupled to the front end of the main housing 1110 naturally closes the intake port 1111 It comes into contact with the fluid to be compressed flowing through.

Therefore, when the plurality of guide protrusions 1223 protrude from the inverter cover 1220 toward the motor chamber S1, the fluid to be compressed flowing through the intake port 1111 flows along the surface of the inverter cover 1220 and is compressed. The flow of the target fluid is naturally guided by the plurality of guide protrusions 1223.

The plurality of guide protrusions 1223 are formed along a direction from the intake port 1111 toward the opposite side of the intake port 1111. If the position where the intake port 1111 is formed in the radial direction of the main housing 1110 is referred to as one side of the main housing 1110, the opposite side of the intake port 1111 may be referred to as the other side of the main housing 1110. According to this standard, the plurality of guide protrusions 1223 may be described as being formed on the surface of the inverter cover 1220, and formed along a direction from one side of the main housing 1110 to the other side.

A rotation shaft support part 1222 is formed in the inverter cover 1220 in the middle of the direction from one side of the main housing 1110 to the other side. Accordingly, the plurality of guide protrusions 1223 may be described as being formed around the rotation shaft support portion 1222.

The rotation shaft support 1222 may protrude from the surface of the inverter cover 1220 in an annular shape toward the motor chamber S1. Accordingly, the rotation shaft support part 1222 may have a hollow cylindrical shape.

At least one hole 1222a through the inside and outside of the annular shape may be formed in a side surface of the rotation shaft support part 1222 corresponding to the side surface of the cylinder. According to such a structure, a low-temperature compression target fluid may flow into the rotation shaft support 1222 through the hole 1222a. The inside of the rotation shaft support part 1222 means the inside of the cylinder. Since a portion of the inverter cover 1220 faces the inside of the cylinder, the portion may be cooled by the fluid to be compressed.

The plurality of guide protrusions 1223 are spaced apart from each other to form a continuous flow path extending from the intake port 1111 to the opposite side of the intake port 1111 therebetween. If the plurality of guide protrusions 1223 are connected to each other, a continuous flow path cannot be formed. For example, if the plurality of guide protrusions 1223 are partially connected, the flow path formed by the plurality of guide protrusions 1223 is partially discontinuous. However, if the plurality of guide protrusions 1223 are spaced apart from each other, a continuous flow path capable of guiding the flow of the fluid to be compressed is naturally formed.

A plurality of guide protrusions 1223 formed in the electric compressor 1000 of the first embodiment are radially arranged around the rotation shaft support 1222. Radial refers to a shape that extends from one point in the center like a wheel. It may be understood that the plurality of guide protrusions 1223 are arranged to be spaced apart from each other along virtual straight lines extending in different directions from a central reference position called the rotation shaft support part 1222.

The plurality of guide protrusions 1223 formed in the electric compressor 1000 of the first embodiment may also be described as being formed along a virtual concentric circle centered on the rotation shaft support 1222. Concentric circles mean multiple circles with the same center. The plurality of guide protrusions 1223 are arranged to be spaced apart from each other in the circumferential direction of a concentric circle sharing a center called the rotation shaft support part 1222 and the radial direction of the rotation shaft.

The degree of spacing between the plurality of guide protrusions 1223 formed in the electric compressor 1000 of the first embodiment may be uniform or non-uniform depending on the direction. For example, in the radial direction of the rotation shaft support part 1222, the plurality of guide protrusions 1223 are arranged to be spaced apart from each other with a uniform spacing D. However, in the circumferential direction of the concentric circle, the plurality of guide protrusions 1223 may be arranged to be spaced apart from each other with non-uniform spacing.

For example, among the virtual concentric circles, a plurality of guide protrusions 1223 arranged along an arbitrary first concentric circle relatively close to the rotation shaft support 1222 are spaced apart from each other at a first distance A1 along the circumference of the first concentric circle. It can be defined as being arranged. And among the virtual concentric circles, a plurality of guide protrusions 1223 arranged along an arbitrary second concentric circle relatively far from the rotation shaft support 1222 are arranged to be spaced apart from each other at a second interval (A2) along the circumference of the second concentric circle. It can be defined as being.

At this time, the first interval A1 and the second interval A2 are not the same, but the first interval A1 is smaller than the second interval A2. For example, as the position of the concentric circle is further away from the rotation shaft support part 1222, the distance between the plurality of guide protrusions 1223 arranged along the circumference of the concentric circle also increases.

According to this structure, since the plurality of guide protrusions 1223 are spaced apart from each other in the radial direction of the rotation shaft support part 1222 and in the circumferential direction of the concentric circle, the intake port 1111 between the plurality of guide protrusions 1223 ), a continuous flow path can be formed. Accordingly, the fluid to be compressed flowing into the intake port 1111 may be guided from the intake port 1111 to the opposite side of the intake port 1111 by a continuous flow path formed by a plurality of guide protrusions 1223. In FIG. 5, the flow of the fluid to be compressed guided by the plurality of guide protrusions 1223 is indicated by arrows.

In particular, the fluid to be compressed that has flowed into the interior of the compression module through the inlet 1111 may be pushed by the fluid to be compressed that is introduced thereafter and naturally flow to the rotation shaft support 1222. If the first interval A1 is smaller than the second interval A2, there is an effect that the fluid to be compressed flowing from the intake port 1111 to the rotary shaft support 1222 can be concentrated around the rotary shaft support 1222. . In addition, if the first interval A1 is smaller than the second interval A2, there is an effect that the fluid to be compressed concentrated around the rotation shaft support 1222 can be diffused to the opposite side of the intake port 1111.

Reference numeral 1216, which is not described in FIG. 3, denotes a fastening member through hole for penetrating the fastening member 1215, and 1217 is an annular sealing member for sealing the coupling portion between the inverter housing 1210 and the inverter cover 1220. Pointing to, 1220a denotes a fastening member through hole for penetrating the fastening member 1221.

Reference numeral 1164 not described in FIG. 4 denotes a ball bearing formed to support the rotation shaft 1140 in a radial direction.

Reference numeral 1220b, which is not described in FIG. 5, denotes an airtight terminal receiving portion for accommodating the three-phase airtight terminal 1260, and 1113 denotes a fastening member for coupling the main housing 1110 and the rear housing (see 1120 in FIG. 2) ( The guide protrusion 1223 may not be formed in a region that indicates the fastening member receiving groove for 1123 and overlaps the airtight terminal receiving portion 1220b.

Hereinafter, other embodiments of the guide protrusion 2223 will be described.

6 is a front view of an inverter cover 2220 related to a second embodiment of the present invention.

The plurality of guide protrusions 2223 are formed in an imaginary circle centered on the rotation shaft support 2222. And the guide protrusions 2223 adjacent to each other among the plurality of guide protrusions 2223 are arranged to be spaced apart at equal intervals in all directions. All directions refer to the vertical, left and right directions centered on one of the guide protrusions 2223. According to the guide protrusion 2223 having such a structure, the fluid to be compressed flowing through the intake port 2111 can be stably guided to the opposite side of the intake port 2111.

The rotation shaft support 2222 protrudes from the surface of the inverter cover 2220 in an annular shape toward the motor chamber S1, and accordingly, the inner and outer sides of the annular shape are separated from each other. At least one hole (see 1222a in FIG. 3) is formed on the side of the rotation shaft support part 2222. This hole 1222a allows an inner region and an outer region separated by the rotation shaft support 2222 to communicate with each other. The fluid to be compressed may flow into and out of the rotation shaft support part 2222 through the hole 1222a.

The surface of the inverter cover 2220 is also divided into an annular inner and an outer surface by the rotation shaft support 2222. The plurality of guide protrusions 2223 may be formed on both the inner and outer sides of the annular shape divided by the rotation shaft support 2222. Accordingly, the fluid to be compressed that has flowed into the interior of the compression module through the intake port 2111 may be guided from the outside to the inside of the rotation shaft support part 2222 and from the inside to the outside again to the opposite side of the intake port 2111. In addition, the surface of the inverter cover 2220 may be cooled by the compression target fluid in both a position corresponding to the inner side of the rotation shaft support part 2222 and a position corresponding to the outer side.

It is only in the second embodiment that a hole 2222a is formed in the rotation shaft support part 2222, and a plurality of guide protrusions 2223 are formed in both a position corresponding to the inner side and a position corresponding to the outer side of the rotation shaft support part 2222. It can also be applied to other embodiments.

Reference numeral 2220a not described in FIG. 6 denotes a fastening member through hole, 2241' denotes a power connector receiving hole, 2242' denotes a communication connector receiving hole, and 2220b denotes an airtight terminal receiving portion.

7 is a front view of an inverter cover 3220 according to a third embodiment of the present invention.

While the guide protrusion 3223 of the first and second embodiments protrudes in a hemispherical shape, the guide protrusion 3223 of the third embodiment may protrude in a shape other than a hemispherical shape. For example, as described below, the guide protrusion 3223 may protrude in a form extending along a straight line or a curve.

The rotation shaft support part 3222 may be divided into a first guide protrusion 3223a, a second guide protrusion 3223b, a third guide protrusion 3223c, and a fourth guide protrusion 3223d according to the formation position and extension direction.

The first guide protrusion 3223a protrudes from the inverter cover 3220 and extends along an imaginary circle centered on the rotation shaft support part 3222. The first guide protrusion 3223a may be formed in plural. The plurality of first guide protrusions 3223a may be arranged to be spaced apart from each other on the circumference of the virtual circle. It can be understood that the plurality of first guide protrusions 3223a protrude in the shape of a circular arc along a curve. Even in the same virtual circle, there can be multiple arcs, and the sizes of multiple arcs can be different.

There may be a plurality of virtual circles, and the plurality of virtual circles correspond to a virtual concentric circle centered on the rotation shaft support part 3222. Among the plurality of first guide protrusions 3223a, those extending along different virtual concentric circles may be arranged to be spaced apart from each other in the radial direction of the rotation shaft support part 3222.

The degree to which the plurality of first guide protrusions 3223a are spaced apart from each other in the radial direction increases as the distance from the rotation shaft support part 3222 increases. For example, assuming that the virtual concentric circle includes a first concentric circle (C1), a second concentric circle (C2), and a third concentric circle (C3), the first concentric circle (C1) is formed at a position relatively close to the rotation axis. , The second concentric circle (C2) is formed at a position farther from the rotation shaft support portion (3222) than the first concentric circle (C1), and the third concentric circle (C3) is a rotation shaft support portion (3222) than the second concentric circle (C2). It is formed at a location far from The second concentric circle C2 may be understood as being formed between the first concentric circle C1 and the third concentric circle C3.

At this time, the plurality of first guide protrusions 3223a arranged along the first concentric circle C1 and the plurality of first guide protrusions 3223a arranged along the second concentric circle C2 are first in the radial direction of the rotation axis. They are arranged to be spaced apart from each other with an interval B1. In addition, the plurality of first guide protrusions 3223a arranged along the second concentric circle C2 and the plurality of first guide protrusions 3223a arranged along the third concentric circle C3 have a second interval in the radial direction of the rotation axis. Arranged apart from each other with (B2). In addition, the first interval B1 is smaller than the second interval B2. The effect of the difference in this interval is the same as the effect on the difference between A1 and A2 described above.

The plurality of first guide protrusions 3223a protrude along an arc formed in each concentric circle. The size of arcs formed in different concentric circles may not be constant. For example, the closer to the rotation shaft support part 3222 corresponding to the center of the concentric circle, the smaller the size of the arc, and the further away from the rotation shaft support part 3222, the size of the arc may increase.

The first guide protrusion 3223a may also be formed inside the rotation shaft support part 3222. At least one hole 3222a may be formed on the side of the rotation shaft support part 3222, and the fluid to be compressed flowing into the rotation shaft support part 3222 is a first guide protrusion formed inside the rotation shaft support part 3222 Can be guided by (3223a).

The second guide protrusion 3223b extends from one of the plurality of first guide protrusions 3223a toward the intake port (see 1111 in FIG. 5). Assuming that there is an imaginary straight line passing through the rotation shaft support part 3222, and if the imaginary straight line extends in a direction toward the intake port, the second guide protrusion 3223b extends toward the intake port along the imaginary straight line. In particular, from one end of the plurality of first guide protrusions 3223a disposed closest to the virtual straight line, the second guide protrusion 3223b extends toward the intake port.

The second guide protrusion 3223b may be formed in plural. If a plurality of imaginary straight lines passing through the rotation shaft support part 3222 are said to be plural, all of the plurality of imaginary straight lines extend parallel to each other from the rotation shaft support part 3222 toward the intake port. In addition, the plurality of second guide protrusions 3223b also extend parallel to each other along virtual straight lines.

A plurality of second guide protrusions 3223b extending along any one virtual straight line may also be formed, and may be disposed to be spaced apart from each other on the straight line.

The third guide protrusion 3223c extends from one of the plurality of first guide protrusions 3223a toward the opposite side of the intake port. Here, the other means that the second guide protrusion 3223b is different from the corresponding first guide protrusion 3223a extending.

As previously described in the second guide protrusion 3223b, assuming that there is an imaginary straight line passing through the rotation shaft support part 3222, and if the imaginary straight line extends in a direction opposite to the intake port, the third guide protrusion 3223c Extends toward the opposite side of the intake port along the imaginary straight line. In particular, from one end of the plurality of first guide protrusions 3223a disposed closest to the virtual straight line, the third guide protrusion 3223c extends toward the opposite side of the intake port.

The third guide protrusion 3223c may be formed in plural. If a plurality of imaginary straight lines passing through the rotation shaft support part 3222 are assumed, all of the plurality of imaginary straight lines extend parallel to each other from the rotation shaft support part 3222 toward the opposite side of the intake port. In addition, the plurality of third guide protrusions 3223c also extend parallel to each other along virtual straight lines.

The third guide protrusion 3223c extending along any one virtual straight line is also formed in plural, and may be disposed to be spaced apart from each other on the straight line.

The second guide protrusion 3223b and the third guide protrusion 3223c extend in opposite directions with respect to the rotation shaft support part 3222.

Among the plurality of first guide protrusions 3223a, the one disposed at the outermost edge of the concentric circle centered on the rotation shaft support part 3222 is a concentric circle from the end of the second guide protrusion 3223b or the end of the third guide protrusion 3223c. Can extend toward the circumferential direction of.

The fluid to be compressed flowing into the intake port may be sequentially guided from the intake port to the opposite side of the intake port by the second guide protrusion 3223b, the first guide protrusion 3223a, and the third guide protrusion 3223c. In particular, the first guide protrusion 3223a, the second guide protrusion 3223b, and the third guide protrusion 3223c are in the circumferential direction of a concentric circle centered on the rotation shaft support part 3222, and in the radial direction of the rotation shaft support part 3222. Since they are arranged to be spaced apart from each other, a continuous flow path for guiding the flow of the fluid to be compressed may be formed. The fluid to be compressed flowing into the intake port may be guided to the opposite side of the intake port by the first guide protrusion 3223a, the second guide protrusion 3223b, and the third guide protrusion 3223.

The fourth guide protrusion 3223d extends along the radial direction of the rotation axis to connect the plurality of first guide protrusions 3223a extending along different virtual concentric circles to each other. In order to guide the continuous flow of the fluid to be compressed, it may be more preferable that the plurality of first guide protrusions 3223a are spaced apart from each other. However, the plurality of guide protrusions 3223 not only guide the flow of the fluid to be compressed, but also reinforce the rigidity of the inverter cover 3220. In particular, when the fourth guide protrusion 3223d extends in the radial direction, the effect of reinforcing the rigidity of the inverter cover 3220 is further increased.

Reference numeral 3220a not described in FIG. 7 denotes a fastening member through hole, 3241' denotes a power connector receiving hole, 3242' denotes a communication connector receiving hole, and 3220b denotes an airtight terminal receiving part.

8 is an exploded perspective view of an inverter module 4200 according to a fourth embodiment of the present invention.

9 is a cross-sectional view of the inverter module 4200 shown in FIG. 8.

10 is a conceptual diagram of the inverter module 4200 and the main housing 4110 shown in FIG. 8 viewed from the rear side of the electric compressor 4000.

The electric compressor 4000 further includes a cover plate 4224. The cover plate 4224 is formed to cover the plurality of guide protrusions 4223. For example, the cover plate 4224 may be formed in an annular shape. The inner diameter of the cover plate 4224 is the same as the outer diameter of the rotation shaft support portion 4222 or is formed larger than the outer diameter of the rotation shaft support portion 4222. The rotation shaft support part 4222 is inserted into the hole 4222a formed in the cover plate 4224. The outer diameter of the cover plate 4224 is equal to or smaller than the inner diameter of the main housing (see 1110 in FIG. 5). One side of the cover plate 4224 may be partially cut to form an arrangement space for a three-phase airtight terminal (see 1260 in FIG. 2 ).

The cover plate 4224 may be disposed in close contact with the plurality of guide protrusions 4223 formed on the inverter cover 4220 and spaced apart from the surface of the inverter cover 4220. The surface of the inverter cover 4220 here refers to a root portion from which the plurality of guide protrusions 4223 starts to protrude.

As the cover plate 4224 is provided, a flow path through which the fluid to be compressed can pass is formed between the surface of the inverter cover 4220 and the cover plate 4224. The fluid to be compressed may be guided to the opposite side of the intake port 4111 by a plurality of guide protrusions 4223 disposed between the surface of the inverter cover 4220 and the cover plate 4224.

In particular, the fluid to be compressed that has flowed into the intake port 4111 must eventually pass through the driving unit (see 1130 in FIG. 2) and flow into the compression unit (not shown). I can. When the cover plate 4224 is provided, since the fluid to be compressed that has flowed into the flow path does not flow into the compression unit until it exits the opposite side of the intake port 4111, the cooling effect of the inverter cover 4220 may be further increased.

A plurality of cover protrusions 4224a may be formed in the cover plate 4224 as well. The plurality of cover protrusions 4224a may protrude from one surface of the cover plate 4224 toward the plurality of guide protrusions 4223. The plurality of cover protrusions 4224a may have a shape corresponding to the plurality of guide protrusions 4223. According to this structure, the flow path between the surface of the inverter cover 4220 and the cover plate 4224 is further expanded. Accordingly, it is possible to increase the inflow amount of the fluid to be compressed flowing into the flow path, and the cooling effect by the fluid to be compressed is further increased.

The amount of fluid to be compressed flowing into the flow path by setting the protrusion degree of the plurality of guide protrusions 4223 formed in the inverter cover 4220 and the plurality of cover protrusions 4224a formed in the cover plate 4224, It is possible to set a cooling effect by the fluid to be compressed.

Meanwhile, the shape of the guide protrusion 4223 formed on the inverter cover 4220 in the fourth embodiment may be the same as the shape of the guide protrusion 4223 described in the first, second, and third embodiments. I can. For example, in FIGS. 8 to 10, a guide protrusion 4223 having the same shape as the first embodiment is illustrated.

Reference numeral 4220a not described in FIG. 8 denotes a fastening member through hole, 4220b denotes an airtight terminal receiving portion, 4241 denotes a power connector, and 4242 denotes a communication connector.

Reference numeral 4210, which is not described in FIG. 9, is an inverter housing, 4242a is a part inserted into the inverter module from a communication connector, 4242b is a fastening member, 4251 is a printed circuit board, 4252 is a support, 4252a is a bush, and 4253 is a fastening member. , 4270 designates a power element, 4271 a conductive pin, 4280 a heat sink, 4281 a bush, and 4282 a fastening member.

Reference numeral 4113 not described in FIG. 10 denotes a fastening member receiving groove.

Description of the components of the reference numerals that have not been described will be replaced with the previous description.

The guide projections described in the first, second, third, and fourth embodiments described above may be integrally formed with the inverter cover by processing the surface of the inverter cover. For example, in the case of manufacturing an inverter cover by a method of casting, a mold including a shape of a guide protrusion may be manufactured, and the inverter cover may be manufactured using the mold. In this case, the inverter cover and the plurality of guide projections are not separated from each other.

Alternatively, the plurality of guide protrusions may be formed on a separate member that is separate from the inverter cover. The fifth embodiment described below relates to an electric compressor including separate members in which a plurality of guide projections are formed.

11 is an exploded perspective view of an inverter module 5200 according to a fifth embodiment of the present invention.

12 is a cross-sectional view of the inverter module 5200 shown in FIG. 11.

The electric compressor 5000 includes a protrusion forming plate 5225. The protrusion forming plate 5225 is formed of a thermally conductive material. The protrusion forming plate 5225 is in close contact with the surface of the inverter cover 5220.

The protrusion forming plate 5225 may be formed in an annular shape. The inner diameter of the protrusion forming plate 5225 is the same as the outer diameter of the rotation shaft support portion 5222 or is formed larger than the outer diameter of the rotation shaft support portion 5222. The rotation shaft support part 5222 is inserted into a hole formed in the protrusion forming plate 5225. One side of the protrusion forming plate 5225 may be partially cut to form an arrangement space for a three-phase airtight terminal (see 1260 in FIG. 2 ).

A plate receiving groove 5220c for accommodating the protruding plate 5225 is formed in the inverter cover 5220. A rotation shaft support portion 5222 is formed at the center of the plate receiving groove 5220c, and the plate receiving groove 5220c is formed in a shape corresponding to the inner and outer diameters of the protruding plate 5225. For example, the protrusion forming plate 5225 is formed in an annular shape, and the plate receiving groove 5220c is also formed in an annular shape corresponding to the protrusion forming plate 5225.

The outer diameters of the protrusion forming plate 5225 and the plate receiving groove 5220c may be the same. Accordingly, the protrusion forming plate 5225 may be press-fit into the plate receiving groove 5220c.

The plurality of guide protrusions 5225a may protrude from the protrusion forming plate 5225. The plurality of guide protrusions 5225a protrude from the protrusion forming plate 5225 toward the inner space of the main housing 5110. The shape of the guide protrusion 5225a formed on the protrusion forming plate 5225 may be the same as the shape of the guide protrusion described in the first, second, and third embodiments. For example, in FIGS. 11 to 12, a guide protrusion 5225a having the same shape as the first embodiment is illustrated.

The electric compressor 5000 may include a cover plate 5224 separately from the protrusion forming plate 5225. The plurality of cover protrusions 5224a formed on the cover plate 5224 may correspond to the plurality of guide protrusions 5225a formed on the protrusion forming plate 5225. A detailed description of the cover plate 5224 will be replaced with the description of the fourth embodiment.

Reference numeral 5241, which is not described in FIG. 11, denotes a power connector, 5242 a communication connector, 5220a a fastening member through hole, 5220b an airtight terminal receiving portion, and 5222a a hole formed in the rotating shaft support.

Reference numeral 5210, which is not described in FIG. 12, is an inverter housing, 5242a is a part inserted into the inverter module from a communication connector, 5242b is a fastening member, 5251 is a printed circuit board, 5252 is a support, 5252a is a bush, and 5253 is a fastening member. , 5270 designates a power element, 5271 a conductive pin, 5280 a heat sink, 5281 a bush, 5282 a fastening member, and 5164 a ball bearing.

The electric compressor described above is not limited to the configuration and method of the above-described embodiments, and the embodiments may be configured by selectively combining all or part of each of the embodiments so that various modifications can be made.

Claims (17)

A compression module configured to compress a fluid to be compressed by a rotational motion of a scroll;
An inverter module configured to control driving of the compression module;
A main housing formed to surround a mechanical component provided in the compression module and having an intake port for inhaling a fluid to be compressed;
An inverter cover that forms a boundary between the compression module and the inverter module and is disposed to be exposed to the compression target fluid flowing into the compression module through the intake port; And
A plurality of components protruding from the inverter cover toward the inner space of the main housing to guide the fluid to be compressed flowing through the intake port along the surface of the inverter cover, and formed along a direction opposite to the intake port from the inlet port. Including the guide protrusion of,
The inverter cover is formed with a rotation shaft support protruding from the surface of the inverter cover,
The plurality of guide protrusions are arranged radially around a imaginary concentric circle centered on the rotation shaft support part and spaced apart from each other in a circumferential direction of the concentric circle and a radial direction of the rotation shaft support part,
Among the virtual concentric circles, a plurality of guide protrusions arranged along a first concentric circle relatively close to the rotation shaft support are arranged to be spaced apart from each other at a first interval along the circumference of the first concentric circle,
Among the virtual concentric circles, a plurality of guide protrusions arranged along a second concentric circle relatively far from the rotation shaft support part are arranged to be spaced apart from each other at a second interval along the circumference of the second concentric circle,
The first interval is an electric compressor, characterized in that smaller than the second interval. The method of claim 1,
The contact area between the inverter cover and the fluid to be compressed is defined by an open end of the main housing,
The opposite side of the intake port indicates an opposite position of the intake port with respect to the plurality of guide protrusions within the contact area,
The plurality of guide projections are spaced apart from each other to form a continuous flow path extending from the intake port to the opposite side of the intake port therebetween. delete delete delete The method of claim 1,
The inverter cover is formed with a rotation shaft support protruding from the surface of the inverter cover,
The plurality of guide protrusions are formed in a virtual circle centered on the rotation shaft support, and adjacent guide protrusions are arranged to be spaced apart at equal intervals in all directions. The method of claim 1,
The inverter cover is formed with a rotation shaft support protruding from the surface of the inverter cover,
The plurality of guide projections,
A plurality of first guide protrusions extending along an imaginary circle centered on the rotation shaft support and arranged to be spaced apart from each other;
A second guide protrusion extending toward the intake port from one of the plurality of first guide protrusions; And
And a third guide protrusion extending from another one of the plurality of first guide protrusions toward the opposite side of the intake port. The method of claim 7,
The plurality of first guide protrusions extend along an imaginary concentric circle centered on the rotation shaft support part, and are arranged to be spaced apart from each other. The method of claim 8,
The second guide protrusion is formed in plural, and extends in parallel to each other along virtual straight lines passing through the rotation shaft support,
The third guide protrusion is formed in plural, and extends in parallel with each other along virtual straight lines passing through the rotation shaft support. The method of claim 8,
Among the plurality of first guide protrusions, those extending along different virtual concentric circles are arranged to be spaced apart from each other in a radial direction of the rotation shaft support. The method of claim 10,
The virtual concentric circle,
A first concentric circle positioned relatively close to the rotation shaft support;
A second concentric circle located farther from the rotation shaft support than the first concentric circle; And
It includes a third concentric circle at a position farther from the rotation shaft support than the second concentric circle,
The plurality of first guide protrusions arranged along the first concentric circle and the plurality of first guide protrusions arranged along the second concentric circle are arranged to be spaced apart from each other at a first interval in the radial direction of the rotation shaft support portion,
The plurality of first guide protrusions arranged along the second concentric circle and the plurality of first guide protrusions arranged along the third concentric circle are arranged to be spaced apart from each other at a second interval in the radial direction of the rotation shaft support portion,
The first interval is an electric compressor, characterized in that smaller than the second interval. The method of claim 8,
The plurality of guide protrusions further include a fourth guide protrusion,
The fourth guide protrusion is an electric compressor, characterized in that extending along a radial direction of the rotation shaft support portion to connect the plurality of first guide protrusions extending along different virtual concentric circles. The method of claim 1,
The inverter cover is formed with a rotating shaft support protruding in an annular shape from the surface of the inverter cover,
At least one hole is formed in the side of the rotation shaft support part to allow the inside and the outside of the annular shape to communicate with each other,
The plurality of guide protrusions are electric compressors, characterized in that formed in both a position corresponding to the inner side of the annular shape and a position corresponding to the outer side of the annular shape. The method according to any one of claims 1, 2 and 6 to 13,
The electric compressor, characterized in that the plurality of guide protrusions are formed integrally with the inverter cover by processing the surface of the inverter cover. The method according to any one of claims 1, 2 and 6 to 13,
The electric compressor further includes a cover plate formed to cover the plurality of guide projections,
The cover plate is in close contact with the plurality of guide protrusions, characterized in that the electric compressor is disposed to be spaced apart from the surface of the inverter cover. The method of claim 15,
A plurality of cover protrusions having a shape corresponding to the plurality of guide protrusions are formed on the cover plate,
The electric compressor, characterized in that the plurality of cover protrusions protrude toward the plurality of guide protrusions. The method according to any one of claims 1, 2 and 6 to 13,
The electric compressor further comprises a protrusion forming plate made of a thermally conductive material in close contact with the surface of the inverter cover,
The electric compressor, characterized in that the plurality of guide projections are formed on the projection forming plate.

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