WO2010016690A2

WO2010016690A2 - Inverter housing for electromotive compressor

Info

Publication number: WO2010016690A2
Application number: PCT/KR2009/004289
Authority: WO
Inventors: 이정경; 구인회; 이건호
Original assignee: 두원공과대학교; 두원전자
Priority date: 2008-08-06
Filing date: 2009-07-31
Publication date: 2010-02-11
Also published as: KR20100018227A; WO2010016690A3

Abstract

The present invention relates to an inverter housing arranged at one side of a main housing of an electromotive compressor. The inverter housing includes a bottom member facing the main housing, and a wall formed along the circumference of the bottom member and which extends to a predetermined length from one surface of the bottom member. The bottom member has an upper surface with a plurality of recesses for inserting electronic components, and a lower surface with a groove formed by the recesses formed adjacent to one another. The thus-configured present invention has advantages in that the plurality of recesses serve to widen the contact area at which a heating element contacts a refrigerant to improve the cooling efficiency of the refrigerant, the heating element is inserted in and fixed at the recesses to improve the fixation stability of the heating element, and a plurality of components are optimally arranged in the inverter housing to reduce the size of the same.

Description

Inverter Housing for Electric Compressor

The present invention relates to an inverter housing for a motor-driven compressor, and more particularly, to an inverter housing for a motor-driven compressor in which a capacitor, an inductor, a large power semiconductor element, etc. for controlling the motor of the compressor are accommodated.

In general, an electric compressor has a structure in which a driving shaft is rotated by using an electric motor and the refrigerant gas is compressed by a compression unit which is operated on the driving shaft.

A typical example of the motor-driven compressor is a scroll compressor, which includes a fixed scroll fixedly housed in a housing, a swing scroll pivoting in engagement with the fixed scroll, and an anti-rotation mechanism for preventing rotation of the swing scroll itself. .

An eccentric bush is interposed between the distal end of the drive shaft and the swing scroll, and the swing scroll revolves so as to revolve with a predetermined radius.

Accordingly, when the swing scroll is rotated in the anti-rotation state, refrigerant gas is sucked into the suction chamber formed around the swing scroll and the fixed scroll, and the pocket formed between the scroll wrap of the fixed scroll and the scroll wrap of the swing scroll ( After being compressed by the compression section), the refrigerant compressed into the discharge chamber is discharged from the discharge port formed near the center of the fixed scroll.

A typical example of such an electric scroll compressor is schematically illustrated in FIGS. 1A and 1B, and the structure thereof is described below.

As shown, the conventional electric scroll compressor 1000 has a housing, a suction port 600 and a discharge port 700 formed in the housing, a fixed scroll 810 and a pivoting scroll accommodated in the housing and engaged with each other. 820, an eccentric bush installed between the drive shaft 830 and the motor 840, the tip of the drive shaft 830, and the swing scroll 820 to induce a swing (orbit) motion of the swing scroll 820. 850 and the anti-rotation pin 860 for preventing the rotation of the swinging scroll 820.

In the drawing, the housing may be composed of a front cover 100a, a main housing 100 and a rear cover 100b.

A suction port 600 is formed in the main housing 100, and a discharge port 700 is formed in the front cover 100a.

A suction chamber 130 is formed at a side surface of the main housing 100 to communicate with the suction port 600. In addition, the suction chamber 130 is installed to seal the inverter housing 200.

In the inverter housing 200, an inductor (not shown), a capacitor (not shown), a large power semiconductor device (not shown, such as IGBT or IPM, etc.), which generate a lot of heat, are embedded.

Meanwhile, the refrigerant passing through the suction chamber 130 flows into the compression unit (scroll) and is immediately discharged or discharged through the motor unit in the axial direction.

To this end, the suction chamber 130 has a discharge outlet 150 and the rear discharge port 160 is formed separately.

Since the refrigerant sucked through the suction port 600 flows through the space between the bottom of the inverter housing 200 and the bottom of the suction chamber 130, the suction refrigerant directly comes into contact with the inverter housing 200. The housing is cooled.

That is, the inverter housing 200 is cooled so as to first provide a space in which the suction refrigerant is to be present in the housing, and seal the suction refrigerant space by the inverter housing 200.

However, the conventional inverter housing 200 has a rectangular parallelepiped outer shape, so that the contact area between the inverter housing 200 and the refrigerant is small and the cooling efficiency of cooling the inverter housing 200 is inferior.

In addition, the inside of the inverter housing 200 is filled with an expensive filler for mitigating insulation and shock, the size of the inverter housing 200 is formed so that a large number of heat generating elements are built, so the amount of the filler is used to increase the There was a disadvantage that the manufacturing cost increases.

In addition, conventionally, the bottom of the inverter housing 200 is formed only flat, so that the work of assembling the heating elements has a disadvantage.

The present invention has been made to solve the above problems, an object of the present invention is to provide an inverter housing for an electric compressor to improve the cooling efficiency by increasing the contact area of the inverter housing and the refrigerant.

Another object of the present invention is to provide an inverter housing for a motor-driven compressor that can more robustly and stably install embedded electronic components.

In addition, another object of the present invention is to provide an inverter housing for an electric compressor that can reduce the amount of expensive fillers by reducing the volume of the space portion in which the electronic component is embedded.

In order to achieve the above object, the inverter housing for a motor-driven compressor according to the present invention includes a bottom member facing the main housing, and a wall formed along a circumference of the bottom member and extending from a surface of the bottom member by a predetermined length. In the inverter housing,

A plurality of recesses each of which a plurality of electronic components are inserted are formed on an upper surface of the bottom member, and a recess is formed on the lower surface of the bottom member by the neighboring recesses.

The recess may be formed to protrude from the bottom member of the inverter housing toward the main housing.

The bottom member of the inverter housing is characterized in that the thickness is formed of 3 ~ 5mm.

The concave portion to which the component with high calorific value is coupled is longer than the concave portion to which the component with relatively low calorific value is coupled.

1A is a front view showing a conventional housing for a compressor.

Figure 1b is a perspective view showing the inverter housing of the conventional housing for the compressor.

Figure 2 is a perspective view of the inverter housing of the compressor housing of the present invention.

3 is a front view showing the inverter housing of the present invention.

4 is a cross-sectional view showing the inverter housing of the present invention.

10: Inverter Housing 11: Inductor

12: line filter 13: capacitor

14: inverter 15: circuit board

16: floor member 17: wall

18: space part 19: first hole

20: second hole 31: first recess

32: 2nd recess

Hereinafter, with reference to the accompanying Figures 2 to 4 will be described a preferred embodiment of the present invention. In addition, the same components as the above-described prior art will be denoted by the same reference numerals and redundant description thereof will be omitted.

2 is a perspective view showing an inverter housing of the compressor housing of the present invention, FIG. 3 is a front view showing the inverter housing of the present invention, and FIG. 4 is a sectional view showing the inverter housing of the present invention.

As shown in FIG. 2, the inverter housing 10 is formed in a box shape with an approximately upper surface open.

Specifically, the inverter housing 10 is formed along the circumference of the bottom member 16 and the bottom member 16 facing the main housing 100 of the compressor and extends a predetermined length from one surface of the bottom member 16. A wall 17 is formed, and a space portion 18 is formed inside the wall 17 to accommodate a plurality of parts. A plurality of fixing holes are formed in the bottom member 16 to be fixed to the main housing 100.

As shown in FIG. 3, an inductor 11, a line filter 12, a capacitor 13, and a high power are provided in the bottom member 16 and the space 18 of the inverter housing 10 for an electric compressor of the present invention. A plurality of electronic components such as the semiconductor element 14 and the circuit board 15 are installed and accommodated.

In particular, the inductor 11, the line filter 12, the capacitor 13, the high power semiconductor device 14, the circuit board 15, etc. are fixed to the top surface of the bottom member 16 of the inverter housing 10.

Recesses

31 and 32 are formed.

A groove is formed between the neighboring

recesses

31 and 32 so that the exposed area is wide.

In the drawing, these

concave portions

31 and 32 are composed of the first concave portion 31 and the second concave portion 32, but there may be additional concave portions as necessary.

2 and 4, a capacitor 13 is inserted into and fixed to the first recess 31, and a connector (not shown) for signal connection to the outside is attached to the second recess 32. As shown in FIG. Will be installed.

In addition, the first concave portion 31 and the second concave portion 32 are preferably formed to protrude from the bottom member 16 toward the main housing 100 (see FIG. 1), respectively.

Since the main housing 100 is installed on one side of the inverter housing 10, that is, the bottom surface of FIG. 4, a suction chamber 130 is formed between the main housing 100 and the bottom of the inverter housing 10. While moving along to cool the heat generated in the inverter housing (10).

Although the first recess 31 protrudes more than the second recess 32, these

recesses

31 and 32 may protrude to the same height.

In addition, it is possible to make the concave portion in which the component having a large amount of heat generation is installed to protrude longer, thereby making the contact area with the refrigerant larger.

The inductor 11, the line filter 12, the capacitor 13, the high power semiconductor device 14, the circuit board 15, and the like installed on the bottom member 16 may rotate the speed of the electric motor 840. Since a general component for controlling, a detailed description thereof will be omitted.

In addition, since the inverter housing 10 needs to be cooled by contact with the refrigerant, it is preferable to form the thickness of the bottom member 16 to 3 to 5 mm so as to facilitate heat exchange.

When the thickness of the bottom member 16 is 3 mm or less, the bottom member 16 may be damaged by the suction pressure of the refrigerant, and when the thickness of the bottom member 16 is 5 mm or more, heat exchange with the refrigerant may be slow, resulting in low cooling efficiency.

In addition, a first hole 19 is formed in the inverter housing 10 so as to connect a power line, and a second hole 20 is formed so that a connector for signal transmission with the controller is coupled.

Inverter housing 10 of the present invention having such a configuration is fixed to the upper side of the main housing 100, the front cover (100a) is fixed to one side of the main housing 100, the rear cover (100b) on the other side It is fixedly installed.

Since the inverter housing 10 fixed to the upper side of the main housing 100 is fixed to be spaced apart from the main housing 100, the refrigerant introduced into the main housing 100 is main as shown in FIG. 1B. It moves along the suction chamber 130 formed by the bottom of the housing 100 and the inverter housing 10.

In addition, since the inverter housing 10 is provided with a plurality of heat generating elements such as the inductor 11, the line pillar 12, the capacitor 13, the large power semiconductor element 14, and the circuit board 15, these electronic components Heat generated in the heat transfer through the bottom member 16 is heated to the inverter housing 10.

The heated inverter housing 10 is cooled in contact with a low temperature refrigerant moving along the suction chamber 130.

That is, the bottom member 16 of the inverter housing 10 is heated to a high temperature by the heat generated by the plurality of heat generating elements, but the bottom member 16 is protruding the first recess 31 and the second recess ( Since the refrigerant is in contact with the 32, and the heat exchange is performed by contacting the groove formed between the

recesses

31 and 32, the inverter housing 10 itself is cooled as the bottom member 16 is cooled to a low temperature.

At this time, the bottom member 16 has a large contact area in contact with the refrigerant, thereby increasing the cooling efficiency by the refrigerant. In addition, the bottom member 16 is formed to a thin thickness of 3 ~ 5mm to make the heat exchange more efficiently.

In addition, since the space 18 of the inverter housing 10 of the present invention may be omitted in the space portion 18 of the conventional space portion having a rectangular parallelepiped shape, the amount of expensive filler to be filled in the inverter housing 10 Will be reduced.

According to the present invention having such a configuration, the contact area between the various heating elements and the refrigerant is contacted by the plurality of recesses to increase the cooling efficiency by the refrigerant, and the heating elements are inserted into and fixed to the recesses so that the heating elements can be viewed. There is an advantage that it can be fixed stably.

In addition, the cooling efficiency of the heating element can be maximized by minimizing the bottom thickness of the inverter housing including the bottom of the concave portion under the condition of maintaining durability.

In addition, according to the present invention, a plurality of components can be compactly arranged in the inverter housing, thereby reducing the size of the inverter housing.

In addition, according to the present invention, there is a useful effect that the assembly operation is simple because the heat generating element is assembled by the groove.

Claims

An inverter housing disposed on one side of a main housing of an electric compressor and including a bottom member facing the main housing and a wall formed along a circumference of the bottom member and extending a predetermined length from one surface of the bottom member.

The upper surface of the bottom member is formed with a plurality of recesses each of which is inserted a plurality of electronic components, the lower surface of the bottom member is an inverter housing for an electric compressor characterized in that the groove is formed by the neighboring recesses.
The method of claim 1,

And the recess is formed to protrude from the bottom member of the inverter housing toward the main housing.
The method of claim 2,

The bottom member of the inverter housing is an inverter housing for an electric compressor, characterized in that the thickness is formed of 3 ~ 5mm.
The method of claim 2,

The concave portion to which the component having a large amount of heat generation is coupled is longer than the concave portion to which the component with a relatively low amount of heat generation is coupled.