KR100679857B1 - Housings for inverter integrate electric compressors - Google Patents

Abstract

A housing for an electric compressor integrating an inverter is provided to cool an inverter directly by convection of inhaled refrigerant, thereby improving cooling efficiency. A housing for an electric compressor integrating an inverter includes a main housing(100) formed with a suction chamber(130) at a side surface to be connected to a suction port(600), and the inverter(200) mounted and sealed in the suction chamber, so that inhaled refrigerant flows between a bottom of the suction chamber and the inverter. The inverter is formed with heating fins protruded toward the suction chamber, which is formed with coupling grooves for the heating fins.

Description

Housing for Inverter Integrate Electric Compressors

1 is a cross-sectional view showing the inverter cooling structure of a conventional scroll compressor.

2 is a side view showing a housing for an inverter-integrated electric scroll compressor according to a first embodiment of the present invention.

3 is a longitudinal cross-sectional view of FIG. 2.

4 is an exploded perspective view of FIG. 2.

5 is an exploded perspective view showing a housing for an inverter integrated electric scroll compressor according to a second embodiment of the present invention.

Fig. 6 is a side view showing a housing for an inverter integrated electric scroll compressor according to a third embodiment of the present invention.

7 is an exploded perspective view of FIG. 6.

FIG. 8 is a view showing a coupling structure between the inverter and the inverter case in FIG. 7, wherein (a) is a bottom perspective view, and (b) is a partially exploded perspective view.

9 is a side view showing a housing for an inverter-integrated electric scroll compressor according to a fourth embodiment of the present invention.

10 is a longitudinal cross-sectional view of FIG. 9.

11 is an exploded perspective view of FIG. 9.

Fig. 12 is a view showing the inverter case in Fig. 9, (a) is a front cover, and (b) is a front view showing an inverter accommodating portion and a channel portion.

FIG. 13 is an exploded perspective view showing a housing for an inverter integrated electric scroll compressor according to a fifth embodiment of the present invention.

FIG. 14 is a partially exploded perspective view illustrating a coupling structure of the inverter and the inverter case in FIG. 13.

15 is an exploded perspective view showing an inverter integrated electric scroll compressor according to a sixth embodiment of the present invention.

※ Explanation of Major Drawings

100 ... main housing

100a ... front cover

100b ... rear cover

200 .... Inverter

300, 500 ... inverter case

600 ... Suction port

700 ... discharge port

810 ... Fixed Scroll

820 ... Turning Scroll

830 ... axis of rotation

840 ... motor

850 ... Eccentric Bushings

860 ... anti-rotation pin

1000 ... Housing

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a housing for an inverter integrated electric compressor, and more particularly to a vehicle inverter integrated electric compressor housing capable of efficiently cooling an embedded inverter.

In general, a scroll compressor is provided with a fixed scroll housed fixedly in a housing, a swing scroll pivoting in engagement with the fixed scroll, and a rotation stopping mechanism for preventing rotation of the swing scroll itself. Further, an eccentric bush is interposed between the distal end of the rotating shaft and the swing scroll, and the swing scroll revolves so as to revolve with a predetermined radius.

Accordingly, when the swinging scroll revolves in the rotational restraint state, the refrigerant gas sucked into the suction chamber is transferred to the compression chamber formed by the fixed scroll and the swinging scroll, and the refrigerant gas is compressed and the discharge port is reduced as the volume in the compression chamber decreases. Is discharged from the discharge chamber.

In addition, as shown in FIG. 1, in a conventional scroll compressor, a compressor (not shown) is disposed on one side 101 of the housing 100, and a motor (not shown) is stored on the opposite side 102. . The base plate 104 is installed above the housing 100 via a bonding plate 106. In addition, the inverter 110 and the condenser 111 are disposed on the circuit mounting surface 105a of the base plate 104, and both of them are covered by the cover 113. The inverter 110 is connected to the motor by a bus bar 114 passing through the base plate 104.

During motor operation, the heat generated by the inverter 110 is indirectly cooled by the low pressure refrigerant gas flowing through the flow path 105b in the housing.

That is, the inverter cooling in the conventional vehicle inverter integrated scroll compressor is performed by attaching the inverter heating element close to the scroll compressor housing so that the heat of the inverter is conducted to the suction refrigerant inside the compressor housing.

However, the heat conduction through the housing depends not only on the material of the housing but also on the smallest heat transfer rate, so that it is difficult to effectively cool the inverter. For this reason, the inverter may overheat and be damaged in some cases.

The present invention has been made to solve the above problems, an object of the present invention is to directly cool the built-in inverter by convection or heat transfer through the inverter case thinner than the housing of the compressor can significantly increase the cooling efficiency The present invention provides a housing for an inverter integrated electric compressor.

It is also an object of the present invention to provide a housing for an inverter-integrated electric scroll compressor that can facilitate the assembly and installation of the inverter.

In addition, another object of the present invention is to provide a housing for an inverter-integrated electric scroll compressor that can reduce the size of the compressor while cooling the inverter effectively.

In order to achieve the above object, the housing for an electric scroll compressor,

The front cover and the main housing are combined, the suction port and the discharge port are formed, and the inverter is integrally installed.

The suction chamber is formed on the side of the main housing so as to communicate with the suction port,

The suction chamber is installed to seal the inverter,

Intake refrigerant is characterized in that flow between the bottom of the suction chamber and the inverter.

In this case, it is preferable that the radiating fins protrude from the portion facing the suction chamber of the inverter.

In addition, the bottom of the suction chamber is preferably formed with a coupling groove into which the heat radiation fin is inserted.

In addition, an inverter case in which an additional inverter or an inverter is accommodated may be installed at the rear end of the main housing.

In addition, the housing for an electric scroll compressor according to the present invention,

The front cover and the main housing are combined, the suction port and the discharge port are formed, and the inverter is integrally installed.

The suction chamber is formed on the side of the main housing,

The suction chamber is installed to seal the inverter case,

A suction port is formed on an external exposed surface of the inverter case, and a refrigerant outlet is formed on the opposite side of the inverter case.

An inverter is housed inside the inverter case.

Here, it is preferable that the heat dissipation fins protrude from the portion facing the suction chamber of the inverter case.

In addition, the bottom of the suction chamber is preferably formed with a coupling groove into which the heat radiation fin is inserted.

In addition, an inverter case for accommodating an additional inverter or an inverter may be installed at the rear end of the main housing.

In addition, the motor-driven compressor housing according to the present invention,

The front cover and the main housing are combined, the suction port and the discharge port are formed, and the inverter is integrally installed.

Inverter case is installed at the rear opening of the main housing.

A suction port is formed in the inverter case,

An inverter is installed inside the inverter case.

In this case, a suction port is formed at a rear end surface of the inverter case, a refrigerant flow channel communicating with the suction passage is formed therein, and a refrigerant discharge hole communicating with the refrigerant flow channel is formed at the front surface of the inverter case. It is preferable that it is formed.

In addition, a part of the circumference of the inverter case is detachably detached to form an inverter cover, and the inside of the inverter case is preferably configured such that the inverter is installed while the inverter cover is opened.

In addition, a suction port is formed on the rear surface of the inverter case, and a refrigerant discharge hole communicating with the refrigerant flow channel is formed on the front surface.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

First embodiment

2 to 4 show the configuration of the housing for the electric scroll compressor according to the present embodiment.

First, as shown in FIG. 3, the components contained inside the housing for the electric scroll compressor are similar to the prior art.

That is, the electric scroll compressor includes a housing 1000, a suction port 600 and a discharge port 700 formed in the housing 1000, a fixed scroll 810 and a pivot that are accommodated in the housing 1000 and engaged with each other. It is installed between the scroll 820, the rotating shaft 830, the motor 840, the tip of the rotating shaft 830 and the turning scroll 820 to induce a turning (orbital) movement of the turning scroll 820. And an anti-rotation pin 860 for preventing rotation of the eccentric bush 850 and the turning scroll 820.

In the figure, the housing 1000 is 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.

In particular, in this embodiment, the suction chamber 130 is formed on the side of the main housing 100 to communicate with the suction port 600. In addition, the suction chamber 130 is provided to seal the inverter 200.

Meanwhile, the refrigerant passing through the suction chamber flows into the compression unit (scroll) and is immediately discharged, or discharged through the motor unit in the axial direction (see FIG. 3). To this end, the suction chamber discharge port 150 and the rear discharge port 160 is formed separately.

According to the above-described configuration, since the refrigerant sucked through the suction port 600 flows through the space between the bottom of the inverter 200 and the bottom of the suction chamber 130, the suction refrigerant is directly connected to the inverter 200. In contact with the inverter, the cooling efficiency of the inverter is greatly increased.

That is, by first providing a space in which the suction refrigerant will be present in the housing 1000 and sealing the suction refrigerant space by the inverter 200, cooling of the inverter can be effectively performed.

In addition, since the suction port 600 is formed in the suction chamber, it is also advantageous for the dispersion of the refrigerant, and it is possible to prevent heat loss due to the temperature increase of the suction refrigerant.

In this embodiment, the rear cover is not separately separated, but may have a structure in which the main housing 100 and the rear cover 100b are integrally formed.

Second embodiment

5 shows a configuration of a housing for an electric scroll compressor according to the present embodiment. Except for the heat sink 210 formed in the inverter 200 is the same as in the first embodiment, the description of the other components will be omitted.

As shown, a plurality of heat dissipation fins 210 (five in the figure) are formed on the portion facing the suction chamber side of the inverter 200. As a result, heat radiation from the inverter 200 is more efficiently achieved.

Specifically, the suction refrigerant entering through the suction port 600 on the side of the radiating fin has a certain speed, and the suction refrigerant includes not only the refrigerant itself but also oil dissolved in the refrigerant. Therefore, when the suction refrigerant having a speed collides with the heat radiating fin 210, the highly viscous oil adheres to the heat radiating fin 210, and thus the suction refrigerant may be separated into the oil and the refrigerant.

In addition, when the heat radiation fins 210 are installed, the heat exchange area of the heat radiation fins through the bottom of the inverter 200 is increased, so that cooling can be more efficiently performed. In addition, since the heating element is positioned in contact with the top of the heat radiation fins, the cooling effect is further increased.

On the other hand, if the coupling groove 131 is formed in the bottom of the suction chamber 130 is inserted into the radiating fin 210 is coupled to each other is more advantageous in terms of assembly strength.

Of course, the same effects as in the first embodiment are also retained.

Third embodiment

6 to 8 show the configuration of the housing for the electric scroll compressor according to the present embodiment. Except that the inverter case 300 is installed and the same as the second embodiment, the description of the other components will be omitted.

As shown, the suction chamber 130 is formed on the side of the main housing 100, the inverter chamber 300 is installed in the suction chamber 130 to be sealed, the inside of the inverter case 300 The inverter 200 is housed in the structure.

In this case, in order to solve the problem that the inverter case 300 partially blocks the heat from the inverter 200, a suction port 600 is formed on an external exposed surface of the inverter case 300, and the inside ( On the other side), a refrigerant discharge port 380 is formed.

In addition, if the heat radiation fins 310 are formed in the portion facing the suction chamber side of the inverter case 300, the cooling efficiency is greatly increased. In addition, the bottom of the suction chamber 130 may be formed so that the coupling groove 131 into which the heat dissipation fin 310 is inserted.

In addition, the inverter inserting portion 330 may be formed inside the inverter case 300 so that the inverter 200 is firmly fitted to the inverter case 300. That is, the inverter 200 may be installed in a slot type in the inverter case 300.

According to this configuration, in addition to the effects according to the first and second embodiments, the inverter can be easily replaced and repaired, and the assembling work can be simplified.

Further, in the first and second embodiments, the upper end of the inverter may be difficult to cool due to the influence of the temperature of the engine room. However, according to the present embodiment, since the intake refrigerant is returned while enclosing the inside of the inverter case 300, the inverter 200 ) Can be cooled as a whole.

On the other hand, the refrigerant discharged through the refrigerant discharge port 380 of the inverter case 300 passes through the suction chamber, flows into the compression unit (scroll) immediately discharged, or is discharged through the motor unit in the axial direction. That is, the refrigerant flow path is similar to the structure of FIG.

Fourth embodiment

9 to 12 show the configuration of the housing for the electric scroll compressor according to the present embodiment.

As shown, in the housing for the electric scroll compressor according to the present embodiment, the front cover 100a, the main housing 100 and the rear cover 100b are coupled to each other, the suction port 600 and the discharge port 700 ) Is formed.

In particular, an inverter case 500 for accommodating the inverter is installed at the rear end of the main housing 100, and a suction port 600 is formed at the rear of the inverter case 500, that is, the rear cover 100b. The rear cover 100b is detachably attached.

In this embodiment, the refrigerant flow channel 550 is formed along the inner circumference of the inverter case 500 so that the flow of the suction refrigerant passing through the suction port 600 is smooth, and the suction port 600 is also It is formed to communicate with the refrigerant flow channel (550).

In addition, the refrigerant discharge port 580 is formed on the opposite side of the suction port 600 to communicate with the refrigerant flow channel 550 of the inverter case 500, so that the sucked refrigerant is smoothly discharged toward the front motor part.

The coolant flow channel 550 preferably has a circular shape, but the shape does not need to be limited.

In addition, a plurality of heat dissipation fins (not shown) protrude from the front surface of the inverter case 500 to allow more effective cooling. That is, as described above, the oil separation action by the heat radiation fins occur, and the heat generating element is located in contact with the heat radiation fins, so effective cooling is achieved.

According to the present embodiment, since the motor unit, which is a heating element, and the inverter are spaced apart in the axial direction, the concentration of heat generation is alleviated, so that the inverter cooling is advantageous.

In addition, since it is installed at the axial end instead of the side of the housing, it is possible to obtain the effect of greatly reducing the appearance of the compressor.

Fifth Embodiment

13 and 14 show the configuration of the housing for the electric scroll compressor according to the present embodiment. Since the inverter cover 520 is the same as the fourth embodiment except that the inverter cover 500 is provided around the inverter case 500 and there is no refrigerant flow channel, description of other components will be omitted.

Specifically, a part of the circumference of the inverter case 500 is separated to form an inverter cover 520, and the inverter case 500 and the inverter cover 520 are detachable.

In addition, an inverter insertion unit 530 is installed in the inverter case 500 to install the inverter in a state in which the inverter cover 520 is opened.

In particular, although the suction port 600 is formed on the rear surface of the inverter case 500, unlike the fourth embodiment, there is no refrigerant flow channel and flows directly surrounding the entire inverter 200. Accordingly, since the suction refrigerant passes in a state closer to the inverter 200 than in the fourth embodiment, the cooling effect is more excellent.

In addition, since the inverter 200 can be installed in a slot type, assembly and maintenance work can be performed more easily.

In addition, since the motor unit, which is a heating element, and the inverter are spaced apart in the axial direction, the concentration of heat generation is alleviated, so that the inverter cooling is advantageous.

In addition, since it is installed at the axial end instead of the side of the housing, it is possible to obtain the effect of greatly reducing the appearance of the compressor.

Meanwhile, a coolant discharge hole 580 is formed on the front surface of the inverter case 500, that is, on the opposite side of the suction port 600, and is discharged from the discharge part through the motor and the compression part.

Sixth embodiment

15 shows the configuration of the housing for the electric scroll compressor according to the present embodiment. This embodiment is a useful method when an additional inverter is installed in the second embodiment, and the inverter is separated into two (first inverter, second inverter).

As shown, a plurality of heat dissipation fins 210 (five in the figure) are formed on the portion facing the suction chamber of the first inverter 200. As a result, heat dissipation from the first inverter 200 is more efficiently performed.

Specifically, the suction refrigerant entering through the suction port 600 on the side of the radiating fin has a certain speed, and the suction refrigerant includes not only the refrigerant itself but also oil dissolved in the refrigerant. Therefore, when the suction refrigerant having a speed collides with the heat radiating fin 210, the highly viscous oil adheres to the heat radiating fin 210, and thus the suction refrigerant may be separated into the oil and the refrigerant.

In addition, when the heat dissipation fins 210 are installed, the heat exchange area of the heat dissipation fins through the bottom of the first inverter 200 is increased, so that cooling can be more efficiently performed. In addition, since the heating element is positioned in contact with the top of the heat radiation fins, the cooling effect is further increased.

On the other hand, if the coupling groove 131 is formed in the bottom of the suction chamber 130 is inserted into the radiating fin 210 is coupled to each other is more advantageous in terms of assembly strength.

In addition, as shown, in the housing for the electric scroll compressor according to the present embodiment, the inverter case 500 for accommodating the second inverter is installed in the rear end opening of the main housing 100, the inverter case ( The rear cover 100b is detachably attached to the rear surface of the 500, that is, the rear cover 100b.

In this case, although the inverter may be accommodated in the inverter case 500, it may be mounted so that it may be sealed only by the inverter itself.

Accordingly, the first inverter that requires a lot of cooling is installed to be sealed to the suction chamber 130 in which the suction port 600 is formed at the side of the main housing 100, and the other second inverter is installed at the rear of the compressor. By dispersing, the cooling efficiency can be increased.

According to the present invention having the above-described configuration, since the inverter can be directly cooled by the convection of the suction refrigerant, the cooling efficiency is greatly increased.

In addition, according to the present invention, by providing an additional heat radiation fin can increase the cooling effect.

In addition, according to the present invention, it is possible to facilitate the assembly configuration while maintaining an excellent heat transfer efficiency by interposing an inverter case thinner than the thickness of the housing.

In addition, according to the present invention, the motor unit and the inverter, which is a heating element, can be spaced apart in the axial direction to effectively perform inverter cooling.

In addition, according to the present invention, since it can be installed at the axial end instead of the side of the housing it is possible to obtain the effect of greatly reducing the appearance of the compressor.

Claims (12)

In the housing for the electric compressor is coupled to the front cover and the main housing, the suction port and the discharge port is formed, the inverter is integrally installed, The suction chamber 130 is formed on the side of the main housing 100 to communicate with the suction port 600, Inverter 200 is installed in the suction chamber 130 to be sealed, Inverter-integrated electric compressor housing, characterized in that the suction refrigerant flows between the bottom of the suction chamber 130 and the inverter (200). The method of claim 1, A housing for the inverter-type electric compressor, characterized in that the heat dissipation fin 210 is protrudingly formed in the portion facing the suction chamber side of the inverter 200. The method of claim 2, The housing of the inverter integrated electric compressor, characterized in that the coupling groove 131 is formed in the bottom of the suction chamber 130 is the heat radiation fin 210 is inserted. The method according to any one of claims 1 to 3, Inverter integrated motor housing, characterized in that the rear end of the main housing 100 is provided with an additional inverter or inverter case accommodating the inverter. In the housing for the inverter-integrated electric compressor is coupled to the front cover and the main housing, the suction port and the discharge port is formed, the inverter is integrally installed, The suction chamber 130 is formed on the side of the main housing 100, Inverter case 300 is installed in the suction chamber 130 to be sealed. A suction port 600 is formed on an externally exposed surface of the inverter case 300, and a refrigerant outlet 380 is formed on an opposite surface of the inverter case 300. An inverter integrated electric compressor housing, characterized in that the inverter 200 is accommodated in the inverter case 300. The method of claim 5, A housing for the inverter-integrated electric compressor, characterized in that the heat dissipation fin 310 is protrudingly formed on the suction chamber side of the inverter case 300. The method of claim 6, The housing of the inverter integrated electric compressor, characterized in that the coupling groove 131 is formed in the bottom of the suction chamber 130 is the heat radiation fin 310 is inserted. The method according to any one of claims 5 to 7, An inverter integrated motor housing, characterized in that the rear end of the main housing 100 is provided with an additional inverter or inverter case 500 is accommodated. In the housing for the inverter-integrated electric compressor is coupled to the front cover and the main housing, the suction port and the discharge port is formed, the inverter is integrally installed, Inverter case is installed at the rear end of the main housing 100, Suction port 600 is formed in the inverter case 500, Inverter case housing 500 is an inverter integrated electric compressor housing, characterized in that the inverter is installed. The method of claim 9, A suction port 600 is formed on a rear surface of the inverter case 500, and a refrigerant flow channel 550 is formed therein, which communicates with the suction port 600, and is provided on a front surface of the inverter case 500. Inverter integrated motor housing, characterized in that the refrigerant discharge hole 580 is formed in communication with the refrigerant flow channel (550). The method of claim 9, A part of the circumference of the inverter case 500 is detachably detached to constitute an inverter cover 520, and the inverter is installed in the inverter case 500 while the inverter cover 520 is opened. A housing for an inverter-integrated electric compressor, characterized in that. The method of claim 11, Suction port (600) is formed on the rear surface of the inverter case (500), the front of the inverter integrated electric compressor housing, characterized in that the refrigerant discharge hole (580) is formed.

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