ELECTRIC COMPRESSOR

Abstract

An electric compressor includes: a driving part being a driving source configured to generate a rotating force of the electric compressor, the driving part including a stator; a motor housing surrounding the driving part, the motor housing including: one or more first mounting lugs installed on an outer surface of the motor housing; and a press fitting portion formed on an inner surface of the motor housing, the stator of the driving part is press fitted into the press fitting portion; a rear housing surrounding a compressing part configured to rotate due to a rotational driving force generated by the driving part so as to compress a refrigerant; and a center housing installed between the motor housing and the rear housing, wherein the first mounting lugs are installed spaced at a first distance from a center of gravity of the electric compressor overlapping with the press fitting portion.

Claims

1. An electric compressor comprising: a driving part being a driving source configured to generate a rotating force of the electric compressor, the driving part comprising a stator; a motor housing surrounding the driving part, the motor housing comprising: one or more first mounting lugs installed on an outer surface of the motor housing; and a press fitting portion formed on an inner surface of the motor housing, the stator of the driving part is press fitted into the press fitting portion; a rear housing surrounding a compressing part configured to rotate due to a rotational driving force generated by the driving part so as to compress a refrigerant; and a center housing installed between the motor housing and the rear housing, wherein the first mounting lugs are installed spaced at a first distance from a center of gravity of the electric compressor and overlapping with the press fitting portion.

2. The electric compressor of claim 1, wherein the first mounting lugs of the motor housing are installed as far away as possible from the center of gravity of the electric compressor within the range of the press fitting portion.

3. The electric compressor of claim 1, wherein the first mounting lugs of the motor housing are installed to be spaced at a second distance from each other on the outer surface of the motor housing.

4. The electric compressor of claim 3, wherein the first mounting lugs of the motor housing are symmetrically installed to be collinear with each other on motor housing.

5. The electric compressor of claim 1, wherein the rear housing comprises: one or more second mounting lugs installed on an outer surface of the rear housing, the mounting lugs being installed to be spaced at a third distance from the center of gravity of the electric compressor.

6. The electric compressor of claim 5, wherein the second mounting lugs are installed as far away as possible from the center of gravity of the electric compressor.

7. The electric compressor of claim 5, wherein the mounting lugs of the rear housing are installed to be spaced at a fourth distance from each other on the outer surface of the rear housing.

8. The electric compressor of claim 7, wherein the second mounting lugs of the rear housing are symmetrically installed to be collinear with each other on the rear housing.

9. The electric compressor of claim 1, wherein the first mounting lugs of the motor housing are formed to have a cylindrical shape.

10. The electric compressor of claim 5, wherein the second mounting lugs of the rear housing are formed to have a cylindrical shape.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0026] FIG. 1 is a view illustrating an overall structure of a general electric compressor;

[0027] FIG. 2 is a front view illustrating an electric compressor according to an exemplary embodiment of the present invention; and

[0028] FIG. 3 is a perspective view illustrating a motor housing included in the electric compressor according to the exemplary embodiment of the present invention.

DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS

[0029] Advantages and features of the present invention and methods of achieving the same will be clearly understood with reference to the following embodiments and the accompanying drawings. However, the present invention is not limited to the embodiments to be disclosed below and may be implemented in various different forms. The embodiments are provided in order to fully explain the present invention and fully explain the scope of the present invention for those skilled in the art. The scope of the present invention is only defined by the appended claims. Meanwhile, the terms used herein are provided only to describe the embodiments of the present invention and not for purposes of limitation. Unless the context clearly indicates otherwise, the singular forms include the plural forms. It will be understood that the terms comprise or comprising, when used herein, specify some stated components, steps, operations and/or elements, but do not preclude the presence or addition of one or more other components, steps, operations and/or elements.

[0030] Hereinafter, embodiments of the present invention will be described with reference to accompanying drawings in detail. FIG. 2 is a front view illustrating an electric compressor according to the present invention, and FIG. 3 is a perspective view illustrating a motor housing include in the electric compressor according to the present invention.

[0031] As illustrated in FIG. 2, an electric compressor 100 of the present invention includes a motor part configured to generate a rotating force, a control unit configured to control operation of the motor part, and a scroll compressing part in which a fixed scroll and a rotating scroll are embedded.

[0032] A motor housing 200 surrounding a driving part configured to generate a rotating force of the electric compressor, a rear housing 300 surrounding the compressing part rotated due to a rotational driving force of the driving part to compress a refrigerant, and a center housing 400 installed between the motor housing 200 and the rear housing 300 are formed outside the electric compressor 100.

[0033] The electric compressor 100 according to the present invention optimizes positions of mounting lugs 220 and 320 installed in the motor housing 200 and the rear housing 300 to minimize an amount of vibrations transmitted to a vehicle body.

[0034] More specifically, in the electric compressor 100, a rotating force M is generated around a center of gravity of the electric compressor due to a gas force of the refrigerant in the compressing part.

[0035] Since forces F1 and F2 at lower ends of the mounting lugs 220 and 320 are calculated by dividing a rotating force by distances from the center of gravity of the electric compressor to the lower ends of the mounting lugs 220 and 320, in order to minimize magnitudes of vibration at the lower ends of the mounting lugs 220 and 320, magnitudes of the forces applied to the mounting lugs 220 and 320 should be minimized. To this end, the electric compressor needs to be designed so that the distances from the center of gravity M to the lower ends of the mounting lugs 220 and 320 are maximized.

[0036] The motor housing 200 surrounds the driving part configured to supply a rotating force of the electric compressor 100. The motor housing 200 is formed to have a hollow shape, and four to eight ribs 210 are formed on an inner circumferential surface of the motor housing 200 along a circumference of the motor housing 200.

[0037] That is, in the motor housing 200, the plurality of ribs 210 are formed on the inner circumferential surface of motor housing 200 to accommodate components such as a motor therein and also prevent deformation of the center housing 400.

[0038] In addition, one or more mounting lugs 220 of the motor housing are mounted on an outer surface of the motor housing 200.

[0039] In this case, the mounting lugs 220 of the motor housing 200 are installed to be spaced a gap from the center of gravity M of the electric compressor 100 within a range of a motor stator press fitting portion 230, and installing the mounting lugs 220 of the motor housing as far away as possible from the center of gravity M of the electric compressor within the range of the motor stator press fitting portion 230 is effective. In other words, the mounting lugs 220 of the motor housing 200 are installed to overlap with the motor stator press fitting portion 230.

[0040] In this case, the mounting lugs 220 of the motor housing are installed within the range of the motor stator press fitting portion 230 so as to obtain a secondary effect in that a motor stator is prevented from being separated therefrom.

[0041] That is, when the motor stator press fitting portion 230 is strengthened by positioning the mounting lugs 220 of the motor housing on the motor stator press fitting portion 230 of the motor housing 200, the motor stator is prevented from being separated therefrom.

[0042] In addition, the mounting lugs 220 of the motor housing are installed to be spaced a gap from each other on the outer surface of the motor housing 200. In the present invention, the mounting lugs 220 of the motor housing are symmetrically installed to be collinear with each other on the motor housing 200.

[0043] In the present invention, the mounting lugs 220 of the motor housing 200 are formed to have a cylindrical shape, but the mounting lugs 220 of the motor housing 200 may be variously changed according to an environment and a purpose.

[0044] The rear housing 300 is rotated due to a rotational driving force of the driving part to surround the compressing part configured to compress the refrigerant.

[0045] One or more mounting lugs 320 of the rear housing are installed on an outer surface of the rear housing 300.

[0046] In this case, the mounting lugs 320 of the rear housing are installed to be spaced a gap from the center of gravity M of the electric compressor. Installing the mounting lugs 320 of the rear housing as far away as possible from the center of gravity M of the electric compressor is effective.

[0047] The mounting lugs 320 of the rear housing are installed to be spaced a gap from each other on the outer surface of the rear housing 300. In the present invention, the mounting lugs 320 of the rear housing are symmetrically formed to be collinear with each other on the rear housing 300.

[0048] In this case, in the mounting lugs 320 of the rear housing, hindrance between the mounting lug of the rear housing and a discharge port may occur according to a position of the discharge port. One of the mounting lugs 320 of the rear housing may move toward the center of gravity M of the electric compressor.

[0049] The center housing 400 is installed between the motor housing 200 and the rear housing 300. The center housing 400 is formed to have a hollow shape, and four to eight grooves are formed along a circumference of an outer surface of the center housing 400.

[0050] That is, the center housing 400 is installed between the motor housing 200 and the rear housing 300 to improve a coupling force of the motor housing 200 and also to minimize deformation of the center housing 400.

[0051] The embodiment of the electric compressor of the present invention will be described below.

[0052] First, the center housing 400 in which the plurality of grooves are formed is installed at one side of the motor housing 200 in which the mounting lugs 220 are installed.

[0053] Next, the rear housing 300 is assembled with one side of the center housing 400 to completely assemble the electric compressor 100.

[0054] Here, an assembly order of the electric compressor may be different from the above described order.

[0055] An electric compressor according to the present invention has effects in that an amount of vibrations transmitted to a vehicle body can be minimized and a level of driving quietness required as an eco-friendly vehicle can be secured by optimizing a position of a mounting lug of a medium electric compressor.

[0056] The above description is only an example describing the technological spirit of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the present invention by those skilled in the art.

[0057] Therefore, the embodiments disclosed above and in the accompanying drawings should be considered in a descriptive sense only and not for limiting the technological scope of the present invention. The scope of rights of the present invention is not limited to the embodiments and the accompanying drawings. The scope of protection of the present invention should be interpreted by the appended claims and encompass all equivalents falling within the scope of rights of the appended claims.