KR20130057889A

KR20130057889A - Electric compressor

Info

Publication number: KR20130057889A
Application number: KR1020110123859A
Authority: KR
Inventors: 박건웅; 문치명; 박일영; 김홍민; 정수철; 홍선주
Original assignee: 한라비스테온공조 주식회사
Priority date: 2011-11-24
Filing date: 2011-11-24
Publication date: 2013-06-03

Abstract

The present invention relates to an electric compressor, wherein the terminal connector 500 is located between the side surface 142a of the coil 142 and the upper surface 141a of the core 141, and protrudes in the axial direction A from the coil 142. Characterized in that it does not have a shape. By changing the shape and structure of the terminal connector 500 in this way, the length of the axial direction (A) of the compressor can be reduced, interference between the lead wires (L1, L2, L3) can be prevented, and the coil 142 and An insulation region between the driver housing 110 may be extended, and insulation breakdown due to exposure of metal parts inside the terminal connector 500 may be prevented.

Description

Electric Compressor {ELECTRIC COMPRESSOR}

The present invention relates to a motor-driven compressor, and more particularly to a motor-driven compressor including a terminal connector with improved shape and installation structure.

2. Description of the Related Art [0002] In general, compressors serving to compress refrigerant in a vehicle cooling system have been developed in various forms, and in recent years, motor compressors have been actively developed.

In such a compressor, there is actually a reciprocating type in which compression is performed while reciprocating movement of the working fluid is compressed, and a rotary type in which compression is performed while rotating.

The reciprocating type includes a crank type for transmitting a driving force of a drive source to a plurality of pistons using a crank, a swash plate type for transmitting to a rotating shaft provided with a swash plate, and a wobble plate type using a wobble plate.

The rotary type includes a rotary type using a rotating rotary shaft and a vane type, and a scroll type using a rotating scroll and a fixed scroll.

1 shows an example of a scroll compressor in cross section. According to this, the scroll compressor includes a driving unit 100, a compression unit 200, and a control unit 300.

The driving unit 100 is a driving source for generating rotational power of the electric compressor, and includes a driving unit housing 110 that forms an outer body, and a stator 140 and a rotor 170 mounted coaxially in the driving unit housing 110. It is configured by.

The drive unit housing 110 is formed to be separable into the motor head housing 120 and the center head housing 130.

Here, the motor head housing 120 has an open shape toward the adjacent center head housing 130, and has a closed shape except for the refrigerant inlet and the connector connection toward the control unit 300. A bearing housing 150 protrudes from the inside of the motor head housing 120. A rotary shaft 171 of the rotor 170 is rotatably installed in the bearing housing 150 through bearings.

In addition, the center head housing 130 has an open shape toward the adjacent motor head housing 120, and has an open shape in which a plurality of holes through which refrigerant is conveyed is formed toward the compression unit 200. The bearing housing 160 protrudes from the inside of the center head housing 130, and the rotation shaft 171 of the rotor 170 is rotatably installed through the bearing in the bearing housing 160.

The stator 140 is a kind of electromagnet which is a driving part for generating a rotational driving force together with the rotor 170. The stator 140 includes a core 141 fixedly mounted on the inner circumferential surface of the driving unit housing 110 by press fitting, 141).

Here, the core 141 is a hollow cylindrical member as shown in the drawing, a through hole into which the rotor 170 is inserted is formed on the central axis, and a plurality of ribs protrude radially inward on the inner circumferential surface of the core 141. The circumferential direction is arranged at regular intervals to form a through hole, wherein the rib extends long along the axial direction of the stator 140 to wind the coil 142.

As described above, the rotor 170 is coaxially mounted on the inside of the stator 140 to be driven to rotate. The rotor 170 is rotatably inserted into a hole in the center of the core 141 of the stator 140. It consists of a rotating shaft 171 arranged along the axis line and a permanent magnet attached to the outer circumferential surface of the rotating shaft 171. Therefore, the rotor 170 rotates by the interaction with the stator 140 according to the driving principle of the motor when the stator 140 is energized.

The compression unit 200 is a portion compressing the refrigerant by rotating by the rotational driving force generated by the drive unit 100, the compression unit housing 210 is formed in the outer body and coupled to the rear of the drive unit housing 110, the compression And a rotating scroll 220 and a fixed scroll 230 mounted relative to the secondary housing 210.

The control unit 300 is a part for controlling the operation of the drive unit 100, forms a cover body 310 coupled to the front of the drive unit housing 110, and is mounted inside the cover housing 310 and various drive times. And a PCB 320 including a furnace and a device.

On the other hand, when the refrigerant is to be compressed by the above-described scroll-type electric compressor, external power is first applied to the controller 300 through a connection end or the like. Accordingly, the control unit 300 transmits an operation signal to the driving unit 100 through a driving circuit.

When the operation signal is transmitted to the drive unit 100, the electromagnet-shaped stator 140 is pressed into the inner circumferential surface of the drive unit housing 110 to be excited and magnetic, and accordingly electromagnetic interaction with the rotor 170 is performed. The rotor 170 is rotated at high speed.

At this time, when the rotating shaft 171 of the driving unit 100 is rotated at high speed, the turning scroll 220 of the compression unit 200 coupled to the rear end of the rotating shaft 171 is rotated at high speed in synchronization with each other, thereby facing The refrigerant flowing from the driving unit 100 to the compression unit 200 by high pressure compression from the outer periphery of the scroll to the center of the scroll is discharged to the refrigerant line by interaction with the fixed scroll 230 matched in a state, and a series of refrigerant compression operations are performed. This will complete.

Meanwhile, a terminal connector 400 is installed inside the motor head housing 120 for electrical connection between the driving unit 100 and the control unit 300, as shown in FIGS. 2 and 3. 400 is installed to be located above the core 141 and the coil 142 of the stator 140.

The reason why the terminal connector 400 is installed above the core 141 and the coil 142 is not only to improve mass production and assemblability of the product but also to secure insulation between the coil 142 and the drive housing 110. Because it could be.

However, due to the installation structure of the terminal connector 400 as described above, the length of the axial direction (A) of the compressor is increased to hinder the miniaturization of the compressor, and the metal part inside the terminal connector 400 is exposed to the coil 142. There was a problem that insulation breakdown may occur.

In addition, the terminal connector 400 does not have a structure to prevent the interference between the lead wires (L1, L2, L3), there was a problem that can cause a defect in the product manufacturing process.

The present invention has been proposed to solve the above problems, by changing the shape and installation structure of the terminal connector, it is possible to reduce the axial length of the electric compressor, to prevent the interference between the lead wires, the coil and the drive unit An object of the present invention is to provide an electric compressor that can extend an insulation region between housings and prevent insulation breakdown due to exposure of metal parts therein.

Motor compressor according to the present invention for achieving the above object comprises a stator composed of a core and a coil and a rotor located inside the stator, the drive unit for generating a rotational driving force by the interaction between the stator and the rotor And a compression unit compressing the refrigerant by rotating by the rotational driving force generated by the driving unit, a control unit controlling the operation of the driving unit, and a terminal connector installed in the driving unit for electrical connection between the driving unit and the control unit. In a motor-driven compressor, the terminal connector includes a housing forming an external shape, and a plurality of terminals installed in the housing and connected to a plurality of lead wires drawn from the coil, wherein the plurality of lead wires are drawn out from the side of the coil. At least one of the plurality of leads is a circle of a coil Characterized in that the take-off in a direction opposite to the direction.

The housing is preferably made of a shape having a curved surface corresponding to the shape of the side of the coil.

In the housing, it is preferable that a lead wire accommodating tunnel accommodating the plurality of lead wires is formed in both directions with respect to the circumferential direction of the coil.

In the lead wire receiving tunnel, it is preferable that barrier ribs are formed to prevent interference between the lead wires.

The terminal connector is located between the side of the coil and the top surface of the core, preferably within the axial length of the coil.

According to the electric compressor as described above, by changing the shape and the installation structure of the terminal connector, it is possible to reduce the axial length of the compressor, to prevent the interference between the lead wires, and to provide an insulation region between the coil and the drive housing It can be expanded, and the breakdown caused by the exposure of the internal metal parts can be prevented.

BRIEF DESCRIPTION OF THE DRAWINGS The figure which shows an example of the electric compressor provided with the conventional terminal connector.
Figure 2 is a perspective view showing the shape and installation structure of a conventional terminal connector.
3 is a cross-sectional view schematically showing the installation structure of a conventional terminal connector.
4 is a view showing an electric compressor according to an embodiment of the present invention.
5 is a perspective view showing the shape and installation structure of the terminal connector applied to the electric compressor according to the embodiment of the present invention.
Figure 6 is a plan view showing the installation structure of the terminal connector applied to the electric compressor according to the embodiment of the present invention.
7 is a cross-sectional view schematically showing the installation structure of the terminal connector applied to the electric compressor according to the embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The objectives, specific advantages and novel features of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG. In the following description of the present invention, detailed description of known related arts will be omitted when it is determined that the gist of the present invention may be unnecessarily obscured by the present invention. In addition, the thickness of the lines or the size of the components shown in the drawings may be exaggerated for clarity and convenience of description. In addition, terms used are terms defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be based on the entire contents of the present specification.

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

Figure 4 is a view showing a motor-driven compressor according to an embodiment of the present invention, Figure 5 is a perspective view showing the shape and installation structure of the terminal connector applied to the motor-driven compressor according to an embodiment of the present invention, Figure 6 is a view of the present invention 7 is a plan view illustrating an installation structure of a terminal connector applied to an electric compressor according to an embodiment, and FIG. 7 is a cross-sectional view schematically illustrating an installation structure of a terminal connector applied to an electric compressor according to an embodiment of the present invention.

4 to 7, the electric compressor according to the embodiment of the present invention includes a driving unit 100, a compression unit 200, a control unit 300, and a terminal connector 500.

The driving unit 100 includes a driving unit housing 110 constituting an outer body, a stator 140 fixed to the inside of the driving unit housing 110, And a rotor 170 positioned in the rotor.

The driving unit housing 110 is formed to be separable into the motor head housing 120 and the center head housing 130, and is formed in a substantially cylindrical shape.

The motor head housing 120 has an open shape toward the adjacent center head housing 130 and has a closed shape toward the control unit 300 except for a coolant inflow portion and a connector connection portion. A bearing housing 150 protrudes from the inside of the motor head housing 120. A rotary shaft 171 of the rotor 170 is rotatably installed in the bearing housing 150 through bearings.

The center head housing 130 has an open shape toward the adjacent motor head housing 120 and has an open shape with a plurality of holes through which the refrigerant is conveyed toward the compression portion 200. A bearing housing 160 protrudes from the center head housing 130 and a plurality of ribs 131 are radially formed around the bearing housing 160. The rotary shaft 171 of the rotor 170 is rotatably installed in the bearing housing 160 through a bearing.

As shown in the figure, the core 141 is a hollow cylindrical member having a through hole into which a rotor 170 is inserted on a center axis. A plurality of ribs protrude radially inwardly from the inner circumferential surface of the core 141 And the ribs are elongated along the axial direction of the stator 140 in order to wind the coils 142.

In addition, the rotor 170 is coaxially mounted on the inside of the stator 140 to be driven to rotate. The rotor 170 is rotatably inserted into the through hole at the center of the core 141 of the stator 140. It consists of a rotating shaft 171 arranged long and a permanent magnet attached to the outer peripheral surface of the rotating shaft 171. Therefore, the rotor 170 rotates by the interaction with the stator 140 according to the driving principle of the motor when the stator 140 is energized.

The driving unit housing 110 is detachably connected to the motor head housing 120 and the center head housing 130, and is formed in a substantially cylindrical shape.

The center head housing 130 has an open shape toward the adjacent motor head housing 120, and has an open shape in which a plurality of holes through which refrigerant is transferred toward the compression unit 200 is formed. The bearing housing 160 protrudes from the inside of the center head housing 130, and a plurality of ribs 131 are radially formed around the bearing housing 160. Meanwhile, the rotating shaft 171 of the rotor 170 is rotatably installed through the bearing in the bearing housing 160.

The compression unit 200 compresses the refrigerant by rotating by the rotational driving force generated by the driving unit 100 and is connected to one side of the driving unit 100. The compression unit 200 includes a compression unit housing 210 constituting an outer body, An orbiting scroll 220 rotatably mounted in the compression housing 210 and a fixed scroll 230 paired with the orbiting scroll 220 to discharge the refrigerant out of the compressor, .

The revolving scroll 220 is formed with a revolving scroll wrap which is curved in a spiral shape converging toward the center and the rear end of the rotary shaft 171 of the rotor 170 is coupled to a center portion of the revolving scroll wrap . Accordingly, the orbiting scroll 220 is rotated in synchronization with the rotation axis 171 of the rotor 170.

In addition, the fixed scroll 230 is protruded in front of the closing surface of the compression unit housing 210 is formed integrally, the fixed scroll 230 is a spiral shape that is matched with the scroll wrap of the orbiting scroll 220 The fixed scroll wraps are arranged to converge towards the center. Therefore, when the swing scroll 220 rotates, the refrigerant sucked into the compression unit 200 by the interaction of the swing scroll wrap and the fixed scroll wrap, which are matched with each other, is compressed to the center of the fixed scroll 230 and then is in a high pressure state. In the discharge portion is discharged to the outside of the compressor through the discharge port penetrated in the center of the finish surface of the housing 210.

The control unit 300 controls the operation of the driving unit 100 and is electrically connected to the stator 140 of the driving unit 100 so that the rotor 170 is driven to rotate, Stop.

The control unit 300 includes a cover housing 310 and a PCB 320 mounted in the cover housing 310 and including various driving circuits and elements. The cover housing 310 Is coupled to one side of the driving unit housing 110 so as to form the outer body of the control unit 300. Here, the various driving circuits and elements mounted on the PCB 320 are operated by an external power source applied through the connection terminal, thereby controlling the operation of the driving unit 100.

The terminal connector 500 is installed inside the motor head housing 120 of the drive housing 110 for electrical connection between the drive unit 100 and the control unit 300.

Here, the terminal connector 500 includes a housing 510 forming an external shape, and a plurality of terminals connected to the housing 510 and a plurality of lead wires L1, L2, and L3 drawn out from the coil 142. It includes 520, and is located between the side surface 142a of the coil 142 and the upper surface 141a of the core 141, it is installed on the upper surface 141a of the core 141. As such, since the terminal connector 500 is positioned between the side surface 142a of the coil 142 and the top surface 141a of the core 141, the metal part inside the terminal connector 500, that is, the terminal 520. ) And the connecting portion between the lead wires (L1, L2, L3) is not exposed toward the coil 142, it is possible to prevent breakdown.

On the other hand, the terminal connector 500 is formed in a shape that does not protrude in the axial direction (A) than the coil 142. As such, since the terminal connector 500 is formed to have a size that does not protrude in the axial direction A from the coil 142, the axial length of the electric compressor can be reduced.

On the other hand, the housing 510 of the terminal connector 500 has a shape having a curved surface 511 corresponding to the shape of the side surface 142a of the coil 142 to optimize the installation structure. In this case, the curved surface 511 of the housing 510 is spaced apart from each other by facing the side surface 142a of the coil 142.

Meanwhile, in the housing 510, lead wire accommodating tunnels 512 accommodating the plurality of lead wires L1, L2, and L3 are formed in both directions with respect to the circumferential direction C of the coil 142. As such, the lead wire receiving tunnel 512 is formed in both directions with respect to the circumferential direction C of the coil 142, whereby a plurality of lead wires L1, L2, and L3 connected to the terminal connector 500 are dispersed to lead wire L1. The possibility of interference between L2 and L3 may be minimized, and the width of the terminal connector 500 may be reduced to minimize the gap between the side surface 142a of the coil 142 and the top surface 141a of the core 141. It can be installed while taking up space.

Meanwhile, a plurality of barrier ribs W1, W2, and W3 are formed in the lead wire receiving tunnel 512 to prevent interference between the lead wires L1, L2, and L3, and the barrier ribs W1, W2, and W3 are formed. Due to this, each of the lead wires L1, L2, L3 connected to the terminal connector 500 may be located in a space independent of each other, thereby preventing interference between the lead wires L1, L2, L3. do.

Meanwhile, the plurality of lead wires L1, L2, and L3 drawn out from the coil 142 are drawn out from the side surface 142a of the coil 142, and thus, the lead wires L1, L2, and L3 are drawn from the side surface of the coil 142. The lead wires L1, L2, and L3 may be minimally exposed between the coil 142 and the terminal connector 500 by being drawn out from the portion 142a, thereby insulating the lead wires L1, L2, and L3. This can be improved.

Of course, in the present invention, the length of the circumferential direction C of the terminal connector 500 is increased than in the conventional case, and the insulation of the lead wires L1, L2, and L3 is increased even through the increase in the circumferential direction C. Can be improved.

Meanwhile, since the lead wire receiving tunnel 512 is formed in both directions with respect to the circumferential direction C of the coil 142, at least one of the plurality of lead wires L1, L2, and L3 may have a circumferential direction of the coil 142. It is preferable that it is formed so that it may take out in the opposite direction with respect to (C). The lead structure of the lead wires L1, L2, and L3 may be a condition that allows the lead wire receiving tunnel 512 to be formed in both directions with respect to the circumferential direction C of the coil 142.

According to the electric compressor according to the embodiment of the present invention described above, by changing the shape and installation structure of the terminal connector, the axial length of the compressor can be reduced, the interference between the lead wires can be prevented, the coil and the drive unit The insulating region between the housings can be expanded, and the breakdown caused by the exposure of the metal parts inside can be prevented.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. It is to be understood that the invention may be variously modified and changed.

100: driving part 110: driving part housing
120: motor head housing 130: center head housing
140: stator 141: core
142: coil 150, 160: bearing housing
170: rotor 200: compression
220: turning scroll 230: fixed scroll
300: control unit 500: terminal connector
510: housing 520: terminal
L1, L2, L3: Lead wire 512: Lead wire accommodation tunnel
W1, W2, W3: bulkhead

Claims

A stator 140 comprising a core 141 and a coil 142 and a rotor 170 positioned inside the stator 140 to rotate therein, and the stator 140 and the rotor 170 may interact with each other. A driving unit 100 generating a rotational driving force;
Compression unit 200 for compressing the refrigerant by rotating by the rotation drive force generated in the drive unit 100;
A controller 300 for controlling the operation of the driver 100; And
In the electric compressor comprising a terminal connector 500 installed in the drive unit 100 for the electrical connection of the drive unit 100 and the control unit 300,
The terminal connector 500 includes a housing 510 that forms an external appearance, and a plurality of terminals 520 that are installed in the housing 510 and to which a plurality of lead wires L1, L2, and L3 drawn out from the coil 142 are connected. ), And the plurality of lead wires L1, L2, L3 are drawn out from the side surface 142a of the coil 142, and at least one of the plurality of lead wires L1, L2, L3 is connected to the coil 142. An electric compressor, which is drawn out in a direction opposite to the circumferential direction (C).

The method according to claim 1,
The housing (510) is an electric compressor, characterized in that the shape having a curved surface (511) corresponding to the shape of the side (142a) of the coil (142).

The method according to claim 1 or 2,
Electric compressor, characterized in that the lead wire receiving tunnel 512 for accommodating the plurality of lead wires (L1, L2, L3) is formed in both directions with respect to the circumferential direction (C) of the coil 142 in the housing 510 .

The method according to claim 3,
The lead wire accommodating tunnel (512) is characterized in that the partition wall (W1, W2, W3) to prevent the interference between the lead wire (L1, L2, L3) is formed.

The method according to claim 1,
The terminal connector 500 is positioned between the side surface 142a of the coil 142 and the top surface 141a of the core 141, and is located within the axial direction A of the coil 142. Motorized compressor.