KR20170040685A

KR20170040685A - Compressor

Info

Publication number: KR20170040685A
Application number: KR1020150139971A
Authority: KR
Inventors: 박희권; 이영훈; 김태완; 오세원
Original assignee: 한온시스템 주식회사
Priority date: 2015-10-05
Filing date: 2015-10-05
Publication date: 2017-04-13

Abstract

The present invention relates to an electrically driven compressor. More specifically, the electrically driven compressor comprises: a motor housing (100) having a suction chamber (102) into which a refrigerant to be compressed flows, and an opening part (110) formed on a first opposite surface (104) facing the outside with respect to an axial direction; and an inverter housing (200) which is constructed independently of the motor housing (100) and has an inverter element (206) mounted on an inner surface of a second opposite surface (204) facing the opening part (110) of the first opposite surface (104). A low temperature refrigerant flowing into the suction chamber (102) directly comes in contact with an outer side of the second opposite surface (204) on which the inverter element (206) is mounted to dissipate heat for the inverter element (206).

Description

[0001] COMPRESSOR [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric compressor, and more particularly, to an electric compressor in which an opening is formed in a motor housing for heat dissipation of an inverter element provided in the electric compressor inverter housing, and the refrigerant contacts directly with the inverter housing to perform heat exchange.

2. Description of the Related Art [0002] Compressors for compressing refrigerant in an air conditioning system for a vehicle have been developed in various forms. Recently, electric compressors driven by electric motors have been actively developed according to the tendency of electric parts to be electricized.

The motor of the electric compressor is usually configured to regulate its output through an inverter. However, since it is driven by electricity, the motors and inverters constituting the electric compressor generate heat, and the heat generated greatly affects the performance of the motor and the inverter. Accordingly, various alternatives for solving such a heating problem are suggested.

In the case of motor cooling, a motor built in the main housing is generally configured to allow the refrigerant to absorb the heat generated by the motor by causing the refrigerant to be compressed to flow directly to the portion where the motor is installed.

However, in the case of inverter cooling, a large number of exothermic switching elements (hereinafter referred to as inverter elements) such as IGBTs (insulated gate bipolar mode transistors) provided in the inverter are included, and since such inverter elements are weak in durability, It is not preferable to cool it to flow.

1, the conventional motor-operated compressor 1a is configured such that the refrigerant introduced into the motor housing 20 for circulation in the direction of the arrow is discharged to the bottom surface of the inverter housing 30 The heat radiation to the positioned inverter element 40 is performed. The thermal energy of the inverter device 40 is transferred to the inverter device 40 through the thermal grease 50 applied between the motor housing 20 and the inverter housing 30.

In the motor compressor 1a used in this manner, since the refrigerant is introduced into the motor housing 20 and then the heat is exchanged through the thermal grease 50, the heat radiation efficiency is lowered.

Korean Patent Publication No. 2008-0008353

SUMMARY OF THE INVENTION The present invention has been conceived in order to solve the above-mentioned problems, and it is an object of the present invention to provide an inverter device in which an opening is formed in a first mating surface of a motor housing facing an inverter housing, To thereby improve the heat transfer efficiency.

According to an aspect of the present invention, there is provided a refrigerator including a suction chamber having a suction chamber for introducing a refrigerant to be compressed therein and having an opening formed in a first mating surface, A housing (100); And an inverter housing 206 having an inverter element 206 mounted on an inner surface of a second mating surface 204 that is independent of the motor housing 100 and faces the opening 110 of the first mating surface 104 The low temperature refrigerant introduced into the suction chamber 102 is directly contacted with the outside of the second mating surface 204 on which the inverter element 206 is mounted, And heat dissipation is performed.

A gasket 300 is provided between the first mating surface 104 of the motor housing 100 and the second mating surface 204 of the inverter housing 200 to prevent the refrigerant from leaking out .

The gasket 300 includes a first gasket 310 disposed at an outermost position with respect to a second mating surface 204 of the inverter housing 200 facing the first mating surface 104 of the motor housing 100 ); And a second gasket 320 having a diameter relatively larger than the diameter of the opening 110.

The opening 110 may have a size corresponding to that of the inverter device 206 or a relatively large size.

The first mating surface 104 is disposed at a position adjacent to the suction hole 2 formed to allow the refrigerant to flow into the motor housing 100 and the refrigerant flows through the opening 110 of the first mating surface 104 To the second mating surface (204) of the inverter housing (200).

And an insulating sheet 400 is interposed between the inside of the second mating surface 204 and the lower surface of the inverter device 206 in the inverter housing 200.

The insulating sheet 400 may have a size covering the entire inverter device 206 when the inverter device 206 is a separate unit.

One end is fixed to the inside of the inverter housing 200 for fixing to the inverter element 206 and the other end pushes the upper surface of the inverter element 206 downward to fix the inverter element 206 And a clip member (500).

And a bolt member (600) fixed to the inverter housing (200) outside the inverter element (206) for fixing to the inverter element (206).

A first screw portion 201 is formed in a circumferential direction of the inverter housing 200 facing the motor housing 100 and a first screw portion 201 is formed in the inner circumferential direction of the motor housing 100, And a second screw portion 101 is formed.

According to the present invention, an opening is formed in the motor housing so that the high temperature heat generated in the inverter element can be effectively exchanged only through the low temperature heat energy of the refrigerant and the second mating surface, and the refrigerant can be directly So that heat can be radiated to the inverter device.

According to this embodiment, since the inverter element can be fixed to the inverter element through the clip member, workability and working process of the operator can be simplified and the inverter element can be kept in a state of being in close contact with the second mating surface of the inverter housing at all times, .

1 is a vertical cross-sectional view schematically showing a heat dissipation state of an inverter element included in a conventional motor-driven compressor;
BACKGROUND OF THE INVENTION 1. Field of the Invention [0001]
3 is a diagram showing a state in which inverter elements according to the present invention are arranged.
4 is a view showing a state in which an inverter element according to the present invention is fixed by a clip member;
5 is a view showing another embodiment of a motor housing and an inverter housing according to the present invention.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. The thicknesses of the lines and the sizes of the components shown in the accompanying drawings may be exaggerated for clarity and convenience of explanation.

In addition, the terms described below are defined in consideration of the functions of the present invention, and these may vary depending on the intention of the user, the operator, or the precedent. Therefore, definitions of these terms should be made based on the contents throughout this specification.

Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings. 2 is a vertical cross-sectional view illustrating the heat dissipation state of the inverter device in the motor-driven compressor according to the present invention. FIG. 3 is a diagram showing a state in which the inverter device according to the present invention is disposed. In which the inverter element is fixed by the clip member.

2 to 4, the motor-driven compressor 1 according to the present embodiment includes a suction chamber 102 into which a refrigerant to be compressed flows, and a first A motor housing (100) having an opening (110) in a mating surface (104); And an inverter housing 206 having an inverter element 206 mounted on an inner surface of a second mating surface 204 that is independent of the motor housing 100 and faces the opening 110 of the first mating surface 104 The low temperature refrigerant introduced into the suction chamber 102 is directly contacted with the outside of the second mating surface 204 on which the inverter element 206 is mounted, And heat dissipation is performed.

The motor housing 100 and the inverter housing 200 of the motor-driven compressor are not integrally formed to maximize the heat dissipation efficiency of the inverter element 206. The motor housing 100 and the inverter housing 200 are separated from each other And then assembled into a single component.

When the motor housing 100 and the inverter housing 200 are manufactured as separate components, the heat dissipation efficiency of the inverter device 206 can be improved, thereby preventing stable operation and malfunction of the inverter device operated under high temperature conditions, The operational safety and efficiency of the compressor can be improved at the same time.

The motor housing 100 has a predetermined space formed therein. The motor housing 100 receives an electric motor (not shown) and a compression mechanism (not shown), which are integrally provided in the internal space. A suction chamber 102 is formed, and a discharge chamber 103 having a scroll for discharging the refrigerant compressed by the compression mechanism is formed.

The motor housing 100 is located on the right side of the first mating surface 104, more specifically, at a position facing the inverter housing 200.

An opening 110 is formed in the first mating surface 104 and the opening 110 is opened at a position facing the inverter device 206 to serve as a passage through which the refrigerant can move. The positions and sizes of the openings 110 vary depending on the arrangement of the inverter elements 206, and the openings 110 are not limited to the shapes shown in the drawings, and may be variously changed.

For example, the opening 110 may have a rectangular shape, but may be formed in other shapes. A guide for guiding the flow of the refrigerant to the rim may be provided so that a large amount of refrigerant can be easily moved toward the second mating surface 204. A groove (not shown) may be formed. The opening 110 may have a size corresponding to that of the inverter device 206 or a relatively large size. The motor housing 100 is formed with a suction hole 2 at a position shown in the drawing and a refrigerant flows into the suction chamber 102 through the suction hole 2.

The inverter housing 200 has a second mating surface 204 formed at a position facing the first mating surface 104 and has the same or similar diameter as the first mating surface 104. Particularly, in the present invention, since the opening 110 is formed in the first mating surface 104, heat can be radiated to the inverter device 206 after the refrigerant moves directly toward the second mating surface 204 The heat radiation efficiency of the inverter element 206 can be improved.

In particular, since the motor housing 100 is disposed in a layout that can be moved immediately toward the second mating surface 204, the refrigerant introduced into the suction chamber 102 through the suction hole 2 has a path shown by an arrow .

When the refrigerant flows into the motor housing 100, the refrigerant flowing through the first suction hole 2 is moved in the direction B where the opening 110 is formed, and the remaining refrigerant is moved in the direction A . Then, heat is applied to the inverter element 206 while being directly contacted to one surface of the second mating surface 204 via the opening 110. Then, the refrigerant is moved in the direction A and mixed with the refrigerant.

The suction hole 2 is formed at the lower right side of the motor housing 100 and the inverter housing 200 is disposed on the right side adjacent to the suction hole 2 so that the refrigerant flowing through the suction hole 2 A copper wire moving to the second mating face 204 of the inverter housing 200 is formed at the shortest distance.

The refrigerant at a relatively lower temperature than that of the refrigerant moved from the suction chamber 102 to the discharge chamber 103 can be moved to the second mating surface 204 of the inverter housing 200, The efficiency can be improved.

The inverter housing 200 includes a high voltage connector (not shown) to which power is inputted from the outside, an inverter element 206 for converting a direct current power supplied from the high voltage connector into an alternating current and delivering it to an electric motor, do.

The number of the inverter elements 206 is not limited to a specific number but may be variously changed. For the additional heat dissipation, the number of the inverter elements 206 It can be used without having an additional cover or a radiating fin on its upper surface.

The main PCB 202 is disposed at a position spaced apart from the upper surface of the inverter element 206. The main PCB 202 is used to control the operation states of the plurality of inverter elements 206. [

A first mating surface 104 and a second mating surface 102 of the inverter housing 200 are provided between the motor housing 100 and the inverter housing 200 to prevent leakage of refrigerant introduced through the suction hole 2. [ And a gasket (300) is provided between the gasket (204). The gasket 300 is located in a space between the motor housing 100 and the inverter housing 200 to block leakage of the refrigerant.

The gasket 300 includes a first gasket 310 disposed at an outermost position with respect to a second mating surface 204 of the inverter housing 200 facing the first mating surface 104 of the motor housing 100 And a second gasket 320 having a diameter that is relatively larger than a diameter of the opening 110.

The first gasket 310 is installed at the edge position as shown in the figure for the overall airtightness of the motor housing 100 and the inverter housing 200 and the second gasket 320 is installed at the position of the inverter housing 206 The first and second mating surfaces 204 and 204 are installed in a state in which both surfaces of the refrigerant are in close contact with the first mating surface 104 and the second mating surface 204, respectively.

The motor compressor sealed by the first gasket 310 and the second gasket 320 interrupts the movement of the refrigerant to the edge region S1 except for the opening 110, It is possible to prevent the refrigerant from being unnecessarily moved to improve the heat dissipation effect of the inverter element 206.

Since the motor compressor is sealed by the first gasket 310 and the second gasket 310, when the refrigerant is moved toward the second mating surface 204 via the opening 110, The second gasket 320 is not moved between the first gasket 310 and the second gasket 320, and the movement of the unnecessary refrigerant is blocked in an area other than where the inverter element 206 is located.

Therefore, the heat generated in the inverter element 206 is always stable with the refrigerant and the heat exchange efficiency is improved, and the expensive inverter element 206 is prevented from malfunctioning or burning.

4, the insulating sheet 400 is interposed between the inside of the second mating surface 204 and the lower surface of the inverter element 206. When the inverter elements 206 are individual units, Cover. The insulating sheet 400 has a relatively large size on the lower surface of the inverter element 206.

One end of the clip member 500 is fixed to the inside of the inverter housing 200 for fixing to the inverter element 206 and the other end of the clip element 500 presses the upper surface of the inverter element 206 downward, 206).

The electric compressor according to the present embodiment uses the clip member 500 to fix the inverter element 206 so that the clip member 500 contacts the upper surface of the inverter element 206 with the second mating surface 204 The low temperature heat energy of the refrigerant can be more smoothly exchanged with the high temperature heat energy generated in the inverter element 206. [

Referring to FIG. 5, the motor-driven compressor according to the present invention can fix the inverter device 206 using the clip member 500 or the bolt member 600 as described above. In this case, The bolt member 600 is inserted from the outside of the inverter element 206 toward the inverter housing 200. The lower end of the bolt member 600 is inserted into the second mating surface 204. In this case, the bolt member 600 is screwed into the second mating surface 204 without passing through the second mating surface 204.

A first screw portion 201 is formed in a circumferential direction of the inverter housing 200 facing the motor housing 100 and a first screw portion 201 is formed in the inner circumferential direction of the motor housing 100, The second screw portion 101 is formed.

Various methods can be used for coupling the motor housing 10 and the inverter housing 200 with each other. As described above, the first screw portion 201 and the second screw portion 101 are assembled to each other , And can be assembled with each other through a fastening member such as a hook.

In this embodiment, the motor housing 100 and the inverter housing 200 are assembled through the first screw portion 201 and the second screw portion 101. In this case, the operator inserts the inverter housing 200 into the motor housing 100) so as to maintain a close contact state. In this case, the operator can easily assemble the inverter housing (200) to the motor housing (100), thereby improving the workability of the operator, and even when repair or replacement due to failure is required, the inverter can be easily disassembled and assembled. .

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It is understandable. Accordingly, the true scope of the present invention should be determined by the following claims.

100: Motor housing
101: first screw portion
102: suction chamber
104: first counter face
110: opening
200: inverter housing
201: second thread portion
204: second counter face
206: inverter device
300: Gasket
310: first gasket
320: second gasket
400: insulating sheet
500: clip member
600: Bolt member

Claims

A motor housing 100 in which a suction chamber 102 into which a refrigerant to be compressed flows is formed and an opening 110 is formed in a first mating surface 104 facing outward with respect to an axial direction; And
The inverter housing 206 is mounted on the inner surface of the second mating surface 204, which is independent of the motor housing 100 and faces the opening 110 of the first mating surface 104. ),
The low temperature refrigerant flowing into the suction chamber 102 is directly contacted with the outside of the second mating surface 204 on which the inverter element 206 is mounted to dissipate heat to the inverter element 206 Lt; / RTI >

The method according to claim 1,
A gasket 300 is provided between the first mating surface 104 of the motor housing 100 and the second mating surface 204 of the inverter housing 200 to prevent leakage of refrigerant. Electric compressors.

3. The method of claim 2,
The gasket (300)
A first gasket (300) disposed at an outermost position with respect to a second mating surface (204) of the inverter housing (200) facing the first mating surface (104) of the motor housing (100);
And a second gasket (300) having a diameter relatively larger than a diameter of the opening (110).

The method according to claim 1,
The opening (110)
Is opened to a size corresponding to or larger than that of the inverter element (206).

The method according to claim 1,
The first mating surface (104)
The motor housing 100 is disposed at a position adjacent to a suction hole 2 formed to allow the refrigerant to flow into the motor housing 100. The refrigerant flows through the opening 110 of the first mating surface 104 to the inside of the inverter housing 200 Is moved to the second mating surface (204).

The method according to claim 1,
In the inverter housing 200,
And an insulating sheet (400) is interposed between the inside of the second mating surface (204) and the lower surface of the inverter element (206).

The method according to claim 1,
The insulating sheet (400)
And the inverter device (206) is of a size that covers the entire inverter device (206).

The method according to claim 1,
One end is fixed to the inside of the inverter housing 200 for fixing to the inverter element 206 and the other end pushes the upper surface of the inverter element 206 downward to fix the inverter element 206 And a clip member (500) for the motor.

The method according to claim 1,
Further comprising a bolt member (600) secured to the inverter housing (200) outside the inverter element (206) for securing to the inverter element (206).

The method according to claim 1,
A first screw portion 201 is formed in a circumferential direction of the inverter housing 200 facing the motor housing 100 and a first screw portion 201 is formed in the inner circumferential direction of the motor housing 100, And a second screw portion (101) is formed.