KR102043908B1

KR102043908B1 - Electrically scroll compressor

Info

Publication number: KR102043908B1
Application number: KR1020150027383A
Authority: KR
Inventors: 박일영
Original assignee: 한온시스템 주식회사
Priority date: 2015-02-26
Filing date: 2015-02-26
Publication date: 2019-12-02
Also published as: KR20160104398A

Abstract

The present invention relates to an electric scroll compressor, which has an inverter provided therein and an inverter casing (130) coupled with the inverter cover (110), one end of the inverter cover (110) and an inverter casing (130) are coupled, and the other end. The rear head 300 is coupled, and includes a cylindrical housing 200 in which a driving unit 250 controlled by the inverter and a compression unit 230 for compressing a refrigerant by the driving unit 250 are installed therein. The housing 200 is characterized in that one body (one body). According to the present invention, by reducing the number of housing can reduce the number of processing surface and the support of the parts laminated at the time of assembly has the effect of improving the mass production quality and cost.

Description

Electric scroll compressor

The present invention relates to an electric scroll compressor, and more particularly, to an electric scroll compressor having an improved housing structure.

A compressor, which is a configuration of a cooling system in an automotive air conditioner, is a device that compresses a refrigerant in a gas state exchanged in an evaporator to a state of high temperature and high pressure that is easy to liquefy and discharges it to a condenser.

Compressors are classified into reciprocating type and rotary type according to refrigerant compression type and compression structure. Reciprocating type compressors are classified into crank type, swash plate type, and wobble plate type compressors. Rotary compressors are divided into main rotary compressors and scroll compressors.

Among them, scroll compressors are provided with fixed scrolls and swing scrolls which mesh with each other and pivot relatively. One or more fluid pockets in which the helical structures of the fixed scroll and the swivel scroll are interlocked and move in varying volume between the helical element of the swivel scroll and the helical element of the fixed scroll as the orbiting scroll pivots relative to the fixed scroll. Is formed. As the swinging operation of the swinging scroll proceeds, the fluid pocket moves to the discharge port of the compressor rear housing, and the volume thereof decreases, so that the refrigerant fluid in the fluid pocket is compressed and discharged through the discharge port.

Korean Utility Registration No. 0410845 discloses a scroll compressor as described above.

Generally, a scroll compressor includes a plurality of rear housings mounted at the rear of the fixed scroll, a center housing mounted at the front of the fixed scroll, a motor housing mounted at the front of the center housing, and a front housing mounted at the front of the motor housing. It has a form for coupling the housing to each other.

Each housing is mutually coupled by a fastening bolt having a length sufficient to connect the respective housings, and a gasket is generally inserted into the coupling surface of each housing. The gasket is for managing tolerances generated during assembly, and the assembly tolerance of the housing may be managed by adjusting the thickness of the gasket.

However, since the conventional scroll compressor uses a plurality of housings, there is a problem in that it is difficult to lower manufacturing costs, and thus a new housing for reducing cost and improving mass production quality is required.

Registered Korean Utility Model No. 0410845 (Registration Date: Mar. 02, 2006)

SUMMARY OF THE INVENTION An object of the present invention is to provide an electric scroll compressor that can reduce cost and improve mass production quality by improving the structure of the housing.

In an electric scroll compressor according to an embodiment of the present invention, an inverter is provided therein and an inverter casing 130 coupled to the inverter cover 110, and the inverter cover 110 and the inverter casing 130 are coupled to one end. The rear head 300 is coupled to the other end of the cylindrical housing 200 in which a driving unit 250 controlled by the inverter and a compression unit 230 for compressing a refrigerant by the driving unit 250 are installed therein. ), The housing 200 is characterized in that one body (one body).

The housing 200 is formed on the outer circumferential surface of both end portions, respectively, a plurality of fastening bolts 30 are inserted into which the inverter cover 110, the inverter casing 130, and the rear cover 110 are respectively coupled. It may include a coupling portion (200a).

The fastening bolt 30 sequentially penetrates through the inverter cover 110 and the inverter casing to be coupled to the coupling part 200a formed at one side of the housing 200, and penetrates the rear cover 110. Characterized in that coupled to the coupling portion (200a) formed on the other side of the housing 200.

Inside the coupling portion (200a) is characterized in that a screw groove corresponding to the thread of the fastening bolt 30 is formed.

It may further include a gasket 270 inserted between the coupling portion 200a and the fastening bolt 30.

The driving unit 250 includes a stator 252 and a rotor 254 installed inside the housing 200, and a rotating shaft 256 installed through the stator 252 and the rotor 254. The compression unit 230 includes a fixed scroll 232 fixed to the rear head 300 and a rotating scroll 234 coupled to the rotary shaft 256 to rotate eccentrically, the housing 200 is one side It may further include a center head 210 coupled to the rotating shaft 256 and receiving the fixed scroll 232 and the revolving scroll 234 on the other side.

The center head 210 is characterized in that coupled to the rotating shaft 256 via a bearing (212a).

The center head 210 accommodates a coupling portion to which the pivoting scroll 234 and the rotating shaft 256 are coupled and forms a back pressure chamber, and the fixed scroll 232 and the pivoting scroll 234. It may include a scroll support 214 for receiving.

The center head 210 may further include an insertion part 214a which is bent outwardly from one end of the scroll support part 214 and extends.

The housing 200 may further include a head support part 200b at which one end thereof is bent toward the outside to insert the insertion part 214a of the center head 210.

One side of the fixed scroll 232 is closely coupled to the inner circumferential surface of the head support portion 200b, and the insertion portion 214a is inserted between the head support portion 200b and one side of the fixed scroll 232. do.

In addition, the electric scroll compressor according to an embodiment of the present invention, the coupling portion (200a) is inserted into one end and the other end of the fastening bolt 30 is formed, the inverter cover 110 and the inverter casing 130 is the fastening One end coupled to the coupling part 200a by the bolt 30, the rear head 300 is coupled to the coupling part 200a on the other end by the fastening bolt 30, and one body ( a cylindrical housing 200 formed of one body, a stator 252 and a rotor 254 installed inside the housing 200, and a rotating shaft installed through the stator 252 and the rotor 254. Compression unit provided with a driving unit 250 having a 256, a fixed scroll 232 fixed to the rear head 300, and a rotating scroll 234 coupled to the rotating shaft 256 eccentrically rotated ( 230 and is accommodated in the housing 200, one side is coupled to the rotating shaft 256 and the other side is A center head 210 for receiving a fixed scroll 232 and a pivoting scroll 234, wherein the fastening bolt 30 sequentially passes through the inverter cover 110 and the inverter casing 130, and the rear Penetrating through the head 300 is characterized in that fastening to each of the coupling portion (200a).

The inside of the coupling portion 200a is characterized in that a screw groove corresponding to the thread of the fastening bolt 30 is formed.

Electric scroll compressor according to an embodiment of the present invention by reducing the number of housing can reduce the number of processing surface and the support of the parts laminated at the time of assembly has the effect of improving the mass production quality and cost.

1 is an exploded cross-sectional view showing an electric scroll compressor according to an embodiment of the present invention;
2 is a cross-sectional view illustrating an electric scroll compressor according to an embodiment of the present invention.

Hereinafter, with reference to the drawings, will be described in detail with respect to according to an embodiment of the present invention.

Hereinafter, an electric scroll compressor according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings (for convenience, a direction in which an inverter is located is defined as a front and a direction opposite thereto).

1 is an exploded cross-sectional view showing an electric scroll compressor according to an embodiment of the present invention, Figure 2 is a combined cross-sectional view showing an electric scroll compressor according to an embodiment of the present invention.

As shown in Figure 1 and 2, the electric scroll compressor 10 according to an embodiment of the present invention is provided with an inverter therein An inverter casing 130 and an inverter cover 110, a housing 200 coupled to the rear of the inverter casing 130, and a rear head 300 coupled to the rear of the housing 200, are compressed therein. The unit 230 and the driving unit 250 are combined.

An inverter for generating a control signal of the driving unit 250 and applying power to the inverter casing 130 is provided, and components for heat dissipation and insulation of the inverter are provided. The inverter is composed of various circuit elements and printed circuit boards. The inverter is electrically connected to the driving unit 250 to control the driving unit 250.

The driving unit 250 includes a stator 252 fixed to the inside of the housing 200, a rotor 254 rotating inside the stator 252, and a rotating shaft 256 installed therethrough. The rear end of the rotating shaft 256 is coupled to the rotating scroll 234 to be described later is driven to rotate in accordance with the rotation of the rotating shaft (256). In addition, the rear end of the rotating shaft 256 is coupled to the center head 210 via a bearing 212a to support the pivoting scroll 234.

The compression unit 230 is inserted into the rear of the housing 200 and supported by the rear head 300 and the compression scroll 232 in engagement with the fixed scroll 232 while being eccentrically rotated by the driving unit 250 ( Swivel scroll 234 forming 214b. The fixed scroll 232 is fixed to the rear side end of the housing 200 and the pivoting scroll 234 is eccentrically rotated by the eccentric bush 258 inside the center head 210 in a state of being coupled to the rotating shaft 256. Possibly combined.

The suction chamber 202, the compression chamber 214b, the discharge chamber 310, and the back pressure chamber 212b are formed inside the housing 200.

The suction chamber 202 is a space for storing the refrigerant sucked from the outside of the housing 200, and the compression chamber 214b is a space for compressing the refrigerant sucked into the suction chamber 202, the fixed scroll 232 and the swing scroll. It is formed between 234. The discharge chamber 310 is a space in which the refrigerant compressed in the compression chamber 214b is discharged, and the back pressure chamber 212b is a space in which a predetermined pressure is formed so that the swing scroll 234 adheres in the fixed scroll 232 direction. .

Looking at the structure of the housing 200 in more detail as follows.

The housing 200 is a cylindrical structure in which the internal space is empty, and the housing 200 is a structure in which the housing 200 is replaced with one housing. That is, the housing 200 is formed of one body.

In the housing 200, the aforementioned driving part 250 is inserted into the front side, and the center head 210 and the compression part 230 are inserted into the rear side. The front end of the housing 200 is coupled to the inverter casing 130 by a fastening bolt 30, and the rear end is coupled to the rear head 300 by a fastening bolt 30. The center head 210 has a front end coupled to the rotating shaft 256 via a bearing 212a, and the rear end of the center head 210 is coupled to an inner circumferential surface of the housing 200.

At the outer end of the housing 200, a plurality of coupling parts 200a into which the fastening bolts 30 are inserted are formed to couple the inverter cover 110, the inverter casing 130, and the rear head 300, respectively. It is preferable that a screw groove corresponding to the thread of the fastening bolt 30 is formed inside the coupling part 200a.

The fastening bolt 30 inserted into the front side of the housing 200 is sequentially inserted into the inverter cover 110 and the inverter casing 130, and then passes through the inverter casing 130 and is fastened to the coupling part 200a. The fastening bolt 30 inserted into the rear side of the housing 200 passes through the outside of the rear head 300 and is inserted into the coupling part 200a. Therefore, the fastening bolt 30 preferably has a length sufficient to be inserted into the coupling portion 200a while being coupled to the inverter cover 110, the inverter casing 130, and the rear head 300, respectively.

Gasket 270 between the coupling surface of the coupling portion 200a and the inverter casing 130, the coupling surface of the inverter casing 130 and the inverter cover 110, and the coupling surface of the coupling portion 200a and the rear head 300. Is inserted. The gasket 270 serves to reduce the assembly tolerance generated when the housing 200 and other components are assembled. That is, the assembly tolerance can be compensated for by adjusting the thickness of the gasket 270.

One side of the rear end of the housing 200 is bent toward the outside to form a head support portion (200b) for supporting the center head 210, one side of the fixed scroll 232 is closely coupled to the inner peripheral surface of the head support portion (200b) do. One side of the center head 210 is inserted and fixed between the head support part 200b and the fixed scroll 232. To this end, one side of the rear end portion of the center head 210 extends toward the head support part 200b. The insertion portion 214a is formed.

The front side of the center head 210 is substantially cylindrical in shape and has a diameter corresponding to the diameter of the coupling site to which the pivoting scroll 234 and the rotating shaft 256 are coupled. The rear side of the center head 210 has a cylindrical shape larger in diameter than the front side, and has a diameter corresponding to the diameter when the swinging scroll 234 and the fixed scroll 232 are coupled. The smaller diameter side of the revolving scroll 234 is defined as the shaft connecting portion 212 and the larger diameter side is referred to as the scroll support portion 214.

The shaft connecting portion 212 is coupled via a bearing 212a inserted between the rotating shaft 256 and the rotating shaft 256 is rotatably supported by the bearing 212a in the fixed center head 210. do. The space formed inside the shaft connecting portion 212 is the back pressure chamber 212b described above, and the space is formed so that the pressure is formed so that the turning scroll 234 comes into close contact with the fixed scroll 232.

A rotating scroll 234 and a fixed scroll 232 are disposed inside the scroll support 214, and the refrigerant is compressed while the rotating scroll 234 rotates with respect to the fixed scroll 232 inside the scroll support 214. The compression chamber 214b which is a space is formed.

On the other hand, when assembling the housing 200, the coupling portion of the housing 200 and the coupling portion between the components inserted therein may have assembly tolerances because several coupling surfaces are stacked. The assembly tolerance can be calculated by applying the root sum of square, and the cumulative tolerance of the final compressor assembly can also be predicted. Based on the predicted cumulative tolerances, assembly tolerances can be managed by applying tolerances in the machining of mating surfaces.

That is, in FIG. 2, when only one surface of the front side A portion of the housing 200 forms a coupling surface with the inverter casing 130, the cross-section of the coupling surface of the housing 200 or the inverter casing 130 is processed through a cross-section. Tolerances can be compensated for. Also, in FIG. 2, the insertion portion 214a of the center head 210 of the rear side coupling portion of the housing 200 forms a coupling surface on both sides of the fixed scroll 232 and the head support portion 200b of the housing 200. have. In this case, the tolerance may be compensated for through the double-sided processing of the insertion portion 214a of the center head 210.

Electric scroll compressor according to an embodiment of the present invention having the above-described configuration can reduce the number of the processing surface and the support of the parts laminated at the time of assembly by reducing the number of housing to improve the mass production quality and reduce the cost have.

An embodiment of the present invention described above and illustrated in the drawings should not be construed as limiting the technical spirit of the present invention. The scope of the present invention is limited only by the matters described in the claims, and those skilled in the art can improve and change the technical idea of the present invention in various forms. Therefore, as long as such improvements and modifications are obvious to those skilled in the art, they will fall within the scope of the present invention.

10: scroll compressor 30: fastening bolt
110: inverter cover 130: inverter casing
200: housing 200a: coupling portion
200b: head support 202: suction chamber
210: center head 212: shaft connection
214: scroll support 214a: insert
230: compression unit 232: fixed scroll
234: swing scroll 250: drive unit
256: rotation axis 270: gasket
300: rear head

Claims

An inverter casing 130 provided with an inverter and coupled to the inverter cover 110,
The inverter cover 110 and the inverter casing 130 is coupled to one end, the rear head 300 is coupled to the other end, and the drive unit 250 and the drive unit 250 controlled by the inverter therein It includes a cylindrical housing 200 is installed, the compression unit 230 for compressing the refrigerant,
The housing 200 is one body,
The driving unit 250 includes a stator 252 and a rotor 254 installed inside the housing 200, and a rotating shaft 256 installed through the stator 252 and the rotor 254. The compression unit 230 includes a fixed scroll 232 fixed to the rear head 300 and a turning scroll 234 coupled to the rotating shaft 256 to eccentrically rotate the housing 200. It further comprises a center head 210, one side is coupled to the rotary shaft 256 and the other side receives the fixed scroll 232 and the revolving scroll 234,
The center head 210 accommodates a coupling portion to which the pivoting scroll 234 and the rotational shaft 256 are coupled and forms a back pressure chamber, and the fixed scroll 232 and the pivoting scroll 234. It includes a scroll support 214 for receiving,
The center head 210 further includes an insertion part 214a which is bent outwardly from one end of the scroll support part 214 and extends.
The insertion part (214a) is a fixed scroll (232) and the electric scroll compressor, characterized in that both sides of the head support portion (200b) of the housing 200 forms a coupling surface.

The method of claim 1,
The housing 200 is formed on the outer circumferential surface of both end portions, respectively, a plurality of fastening bolts 30 inserted into the inverter cover 110, the inverter casing 130, and the inverter cover 110, respectively. Electric scroll compressor including a coupling portion (200a).

The method of claim 2,
The fastening bolt 30 is sequentially penetrated through the inverter cover 110 and the inverter casing to be coupled to the coupling part 200a formed at one side of the housing 200, and penetrates the inverter cover 110. The electric scroll compressor, characterized in that fastened to the coupling portion (200a) formed on the other side of the housing (200).

The method of claim 3,
Motorized scroll compressor, characterized in that the screw groove corresponding to the screw thread of the fastening bolt 30 is formed inside the coupling portion (200a).

The method of claim 4, wherein
And a gasket (270) inserted between the coupling part (200a) and the fastening bolt (30).

delete

The method of claim 2,
The center head 210 is an electric scroll compressor, characterized in that coupled to the rotating shaft (256) via a bearing (212a).

delete

The method of claim 7, wherein
The housing (200) further includes a head support (200b) in which one end is bent toward the outside to insert the insertion portion (214a) of the center head (210).

The method of claim 10,
One side of the fixed scroll 232 is closely coupled to the inner circumferential surface of the head support portion 200b, and the insertion portion 214a is inserted between the head support portion 200b and one side of the fixed scroll 232. Electric scroll compressor.

A coupling part 200a into which one end and another end of the fastening bolt 30 is inserted is formed, and the inverter cover 110 and the inverter casing 130 are connected to the one end side by the fastening bolt 30. It is coupled to, the rear head 300 is coupled to the other side of the coupling portion 200a by the fastening bolt 30, the cylindrical housing 200 formed of one body (one body),
A driving unit 250 having a stator 252 and a rotor 254 installed inside the housing 200, a rotation shaft 256 installed through the stator 252 and the rotor 254, and
A compression unit 230 having a fixed scroll 232 fixed to the rear head 300, a turning scroll 234 coupled to the rotary shaft 256 and eccentrically rotating;
It is accommodated in the housing 200, the one side is coupled to the rotating shaft 256 and the other side includes a center head 210 for receiving the fixed scroll 232 and the revolving scroll 234,
The fastening bolts 30 sequentially pass through the inverter cover 110 and the inverter casing 130, and pass through the rear head 300 and are fastened to the coupling parts 200a, respectively.
The center head 210 accommodates a coupling portion to which the pivoting scroll 234 and the rotational shaft 256 are coupled and forms a back pressure chamber, and the fixed scroll 232 and the pivoting scroll 234. It includes a scroll support 214 for receiving,
The center head 210 further includes an insertion part 214a which is bent outwardly from one end of the scroll support part 214 and extends.
The insertion part (214a) is a fixed scroll (232) and the electric scroll compressor, characterized in that both sides of the head support portion (200b) of the housing 200 forms a coupling surface.

The method of claim 12,
Motorized scroll compressor, characterized in that the screw groove corresponding to the screw thread of the fastening bolt 30 is formed inside the coupling portion (200a).

The method of claim 13,
And a gasket (270) inserted between the coupling part (200a) and the fastening bolt (30).