KR101373992B1 - Electric Compressor - Google Patents

Abstract

The present invention relates to a motor-driven compressor, further comprising a drive terminal assembly (10) connected to the coil end (34) of the stator (35) and electrically connected to the control unit (7). The coil end 34 is connected by the combination of the first terminal housing 11 and the second terminal housing 13, so that the connection strength or durability of the magnet wire and the magnet terminal can be further improved. In addition, the outer wall of the driving unit or the control unit does not protrude outward, thereby making it possible to manufacture the exterior of the compressor as well as the driving unit or the control unit more simply and efficiently.

Description

Electric Compressor

The present invention relates to a motor-driven compressor, and more particularly, to simplify the coupling structure of a drive unit for generating a refrigerant compressive force and a drive unit assembly for electrically coupling a control unit detachably mounted to the drive unit to supply external power to the drive unit. The connection efficiency relates to the improved electric compressor.

In general, a compressor used in a vehicle cooling system plays a role of compressing a refrigerant, and has been developed in various forms. Recently, development of an electric compressor has been actively performed. This motor-driven compressor is generally divided into a drive unit 103, a compression unit 105, and a control unit 107 as shown by reference numeral 101 in FIG.

Here, the drive unit 103 is configured to include a drive unit housing 131 forming an outer body, and a stator 135 and a rotor 141 mounted coaxially in the drive unit housing 131. In addition, the compression unit 105 is configured to include a compression unit housing constituting the outer body and coupled to the rear of the drive housing, and a rotating scroll and a fixed scroll mounted to rotate relative to the compression housing. In addition, the control unit 107 is configured to include various drive circuits and elements, such as a cover housing coupled to the front of the drive unit housing and the PCB mounted inside the cover housing.

In this case, the controller 107 is not only mechanically detachable to the driver 103, but also the driver 103 through the driver terminal 110 to feed the driver 103 by an external power source connected to the controller 107. And electrically short circuited.

To this end, the driving unit 110 is mounted on one end of the control unit 107 side of the stator 135 of the driving unit 103 as schematically shown in FIG. 1, and the connection terminal 136 drawn out from the end surface of the stator 135. In order to connect the to the driver terminal 110, the driver terminal 110 protrudes axially from the driver 103 stator 135 as shown in FIG. 1, and thus the driver housing 131 surrounding the driver terminal 110. ) Also protrudes toward the controller 107 to form the protrusion 140.

For this reason, the housing outline of the control unit 107 mechanically coupled to the driving unit 103 should also be recessed inwardly in view of the protrusion 140, and the compressor 101 as far as the control unit housing opposite the protrusion 140 is also embedded. Since it must protrude convexly outward, there is a problem that the manufacturing efficiency and assemblability is very degraded.

In addition, in connecting the driving terminal 110 to the stator 135 as described above, the connection terminal 136 and the driving terminal 110 of the stator 135 by soldering or the like, so that the durability or strength of the connection site is weak There was also a problem that caused the failure by the connection part is easily dropped.

The present invention has been made to solve the problems of the conventional electric compressor as described above, by connecting the drive unit and the control unit mechanically and electrically through the drive terminal assembly to improve the connection performance of the drive unit and the control unit, The purpose of the present invention is to optimize the structure of the driver terminal so that the appearance of other components such as a driver or a control unit adjacent to the driver terminal can be more simply and efficiently produced.

In order to achieve the above object, the present invention is a fixed stator on the inner circumferential surface of the drive unit housing, the coil is wound so that the through-hole is formed along the axis, the interaction of the rotor rotatably axially supported on the drive housing in the stator A driving unit for generating a rotational driving force by; A swing scroll coupled to one end of the drive unit and synchronously rotated by a rotational driving force generated by the drive unit, a fixed scroll formed to correspond to the swing scroll, and a compression action of the swing scroll and the fixed scroll through a refrigerant suction port. A compression unit compressing the refrigerant introduced into the driving unit housing; And a control unit electrically connected to the stator and the control unit terminal to control the operation of the driving unit, wherein the coil end of the stator is electrically connected and simultaneously connected to the control unit. And a drive terminal assembly, wherein the coil end provides a motorized compressor connected by coupling a first terminal housing and a second terminal housing of the drive terminal assembly.

In addition, the first terminal housing forms an outer body and is open toward the controller to be attached to an end surface of the stator core so that the magnet wire is inserted therethrough, and the second terminal housing opens the first terminal housing. And are electrically connected to each other while fixing the magnet wire between the first terminal housing and the driver terminal assembly, and the driving unit assembly is inserted into the second terminal housing such that one end thereof is in close contact with the magnet wire. A plurality of magmate terminals in which a terminal hole is formed along the stator axis toward the control unit so that the control unit terminal is inserted and connected; And a cover member detachably coupled to the open side of the second terminal housing so that the magnet terminal is pressed against the magnet wire and is not detached from the second terminal housing.

The magnet terminal further comprises: an axial piece extending along the stator axis to be in contact with the magnet wire; And a radial piece extending along the stator radial direction from one end of the axial piece to insert the control terminal.

Therefore, according to the motor-driven compressor of the present invention, the magnet wire protruding radially outward from one side of the outer circumferential surface of the coil end of the drive part stator is gripped by the male and female terminal housings having a snap assembly structure. Since the control terminal is electrically connected to the magnet terminal that is pressed onto the magnet wire by the member, the magnet wire and the control terminal are electrically connected, so that not only the electrical connection performance of the terminal housing assembly electrically connecting the magnet wire and the control terminal In addition, mechanical durability and robustness can also be further improved.

In addition, since the control terminal assembly can be configured to be short so that the end surface thereof does not leave the stator coil end, it is possible to prevent the external protrusion of the control unit terminal portion to enable a simpler and more efficient production of the drive unit, the controller and even the compressor appearance.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows typically the relationship of each site coupling of the conventional electric compressor.
Figure 2 is a cross-sectional view showing one embodiment of the electric compressor according to the present invention.
FIG. 3 is an enlarged partial perspective view illustrating an engaged state of the driving unit assembly illustrated in FIG. 2.
4 is an exploded perspective view of the drive terminal assembly shown in FIGS. 2 and 3;

Hereinafter, a motor-driven compressor according to an embodiment of the present invention will be described with reference to the accompanying drawings.

As shown by reference numeral 1 in FIG. 2, the motor-driven compressor according to the present invention includes a driving unit 3, a compression unit 5, and a control unit 7.

Here, first, the drive unit 3 is a drive source for generating the rotational power of the compressor 1, and as shown in FIG. 2, the drive unit housing 31 is externally formed, and a stator fixed in the drive housing 31 is formed. 35, and a rotor 41 rotating inside the stator 35.

In this case, as shown in FIG. 2, the driving unit housing 31 is a portion forming an outer body of the driving unit 3, and is generally formed in a cylindrical shape as shown in the drawing, and is open toward the adjacent control unit 7. On the finishing surface 21 on which the control unit 7 on the opposite side is mounted, the rotating shaft 37 of the rotor 41 of the driving unit 3 is rotatably fixed through the bearing 39. In addition, the drive housing 31 has a coolant suction port 23 through which a coolant is supplied, penetratingly formed on one side of the circumferential surface adjacent to the finish surface 21.

The stator 35 is a driving part for generating a rotational driving force together with the rotor 41 mounted coaxially inside, and as shown in FIG. 2, as a kind of electromagnet, the stator 35 is press-fitted on the inner circumferential surface of the driving unit housing 31. It consists of a stator core 25 fixedly mounted and a coil 33 wound around this stator core 25. Here, the stator core 25 is a hollow cylindrical member as shown in the drawing, and a through hole into which the rotor 41 is inserted is formed on the central axis, and a plurality of ribs are radially inwardly formed on the inner circumferential surface of the stator core 25. Protruding into the circumferential direction to form a through hole, wherein the rib extends long along the axial direction of the stator core 25 to wind the coil 33.

As described above, the rotor 41 is coaxially mounted inside the stator 35 to be driven to rotate. As shown in FIG. 2, the rotor 41 is formed at the center of the stator core 25 of the stator 35. The bar is rotatably inserted into the through hole, and includes a rotating shaft 37 arranged along a central axis and a permanent magnet (not shown) attached to an outer circumferential surface of the rotating shaft 37.

Therefore, the rotor 41 is driven to rotate by interaction with the stator 35 in accordance with the driving principle of the motor when the stator 35 is excited, for this purpose, the rotor 41 is a bearing of the rotating shaft 37 The support 39 is rotatably supported by the drive housing 31, and the bearing 39 is fitted to the finish surface 21 by the bearing boss 43 and mounted to the drive housing 31.

In particular, the drive unit 3 of the present invention, as shown in Figure 2 and 3, the drive terminal assembly 10 is mounted on one end surface of the core 25 of the stator 35, the drive terminal assembly 10 ) Is a means for electrically fastening the stator 35 to the control unit 7, as shown, a female first terminal housing 11, a male second terminal housing 13, and a plurality of magmate terminals 15. And the cover member 17.

Accordingly, the driver terminal assembly 10 includes a magnet wire 36 protruding radially outwardly from one side of the outer circumferential surface of the coil end 34 of the stator 35, and thus, the first terminal housing 11 and the second terminal housing 13. Interposed and gripped therebetween, and electrically connected to the control unit 7 through the control unit terminal 71 inserted into the magnet wire 36 and bound to the terminal hole 19 (see FIG. 4) of the magnet terminal 15. do. At this time, the male and female first and second terminal housings 11 and 13 extend along the stator 35 axis, and the length of the male and female terminal housings 11 and 13 is limited so as not to exceed the end surface of the coil end 34 so that the control unit terminal 71 is inserted. It is preferable that the end face of the cover member 17 is located on the same line as the end face of the coil end 34.

Here, the first terminal housing 11 is an outer casing part that forms the outer body of the driver terminal assembly 10, and is attached to an end surface of the stator core 25, as shown in FIGS. It is open toward (7), and therefore it is made to insert-mount not only the 2nd terminal housing 13 but the magmate terminal 15 inside. In particular, as shown in FIG. 3, the first terminal housing 11 has a magnet wire 36 protruding radially outward from one side of the outer circumferential surface of the coil end 34 so as to penetrate through the lower middle portion. In this case, when the driving unit 3 is three-phase, the magnet wire 36 has two bundles, and each of the insertion grooves 77 into which the magnet wires 36 are inserted is also provided with three as shown in FIG. 4. A fitting hole 79 penetrates through a wall between the respective insertion grooves 77, so that the fitting protrusion of the second terminal housing 13 when the second terminal housing 13 is inserted into the first terminal housing 11. 81 to prevent the second terminal housing 13 from being separated from the first terminal housing 11.

The second terminal housing 13 is an inner casing portion for holding and holding the magnet wire 36 of the stator 35 and inserting and receiving the magnet terminal 15, as shown in FIGS. 2 to 4. As shown in FIG. 4, the insertion groove of the first terminal housing 11 has the same outer shape as that of the inner circumferential surface of the first terminal housing 11 so as to be inserted into the open side of the first terminal housing 11. The magnet wire 36 sandwiched between the first terminal housing 11 and the first terminal housing 11 is gripped by pressing the magnet wire 36 inserted into the press-fit groove 83. To this end, as shown in FIGS. 2 to 4, the second terminal housing 13 recesses the seating recesses 85 into which the respective mat terminals 15 are inserted and seated along the respective press-in recesses 83. Form. In addition, the second terminal housing 13 has a fitting protrusion 81 that snaps to the fitting hole 79 of the first terminal housing 11 as described above on the radially outer wall surface of the stator 35. On the circumferential outer wall surface of the stator 35, a fitting protrusion 86 which snaps to the fitting hole 87 of the cover member 17 protrudes.

The magnet terminal 15 is a terminal of the drive terminal assembly 10 that electrically connects the magnet wire 36 of the stator 35 and the control terminal 71 of the control unit 7. As shown, the bar is formed in the shape of a bar by the axial piece 73 and the radial piece 75 perpendicular to each other at one end, the axial piece 73 is a seating groove ( 85 is inserted along the stator 35 axis to be in close contact with the magnet wire 36, the insertion slot 89 is cut off along the axis to be crimped with the magnet wire 36. Further, the radial piece 75 extends perpendicularly from the end of the control section 7 side of the axial piece 73, ie in the radial direction of the stator 35, so as to insert the control terminal 71 in the middle. A terminal hole 19 is formed along the stator 35 axis in the portion.

Finally, the cover member 17 is a means for inserting the second terminal housing 13 and the magmate terminal 15 into the first terminal housing 11, and then closing the drive terminal assembly 10. As shown in FIGS. 2 to 4, the fitting protrusions, which are seated on the open side of the first terminal housing 11 to cover the magmate terminal 15, protrude on the circumferential sidewall of the second terminal housing 13. 86 is detachably snapped to the fitting hole 87 protruding at the side end so that the magnet terminal 15 is not only pressed against the magnet wire 36 but also detached from the second terminal housing 13. The stator 35 has a plurality of insertion holes 91 through which the control terminal 71 can pass so as to be inserted into and connected to the terminal hole 19 of the magmate terminal 15. It is penetrated on a straight line in the circumferential direction.

Meanwhile, the compression unit 5 is a portion compressing the refrigerant by rotating by the rotation driving force generated by the driving unit 3, as shown in FIG. 2, which is connected to the rear end of the rotation shaft 37 of the driving unit 3. Compression unit housing 51 forming an outer body, swinging scroll 53 rotatably mounted in the compression unit housing 51, and a pair of rotational scrolls 53 for compressing the refrigerant to compress the outside of the compressor 1. It is configured to include a fixed scroll 55 to be discharged to.

Here, the compression unit housing 51 is a cylindrical body opened toward the driving unit 3, as shown in FIG. 2, and forms an outer body of the compression unit 5, and is coupled to the rear surface of the driving unit housing 31. The refrigerant is discharged through the discharge port 58 opened at one side of the wall surface of the rear head housing 57 coupled to the rear surface. In addition, as shown in FIG. 2, the swing scroll 53 has a pivoting scroll wrap 59 that is curved in a spiral shape so as to converge toward the center, and protrudes from the rear side, and is located at the center of the swing scroll wrap 59. The rear end of the rotation shaft 37 of the drive unit 3 is engaged to rotate in synchronization with the rotor 41. In addition, as shown in FIG. 2, the fixed scroll 55 protrudes in front of the finish surface of the compression unit housing 51 to be integrally formed, and is formed in a spiral form so as to match with the scroll wrap 59 of the revolving scroll 53. The fixed scroll wrap 61, which is curved at, is arranged to converge toward the center. Therefore, when the swing scroll 53 rotates, the coincidence swing scroll 53 and the fixed scroll 55 pivot in the drive unit 3 by the interaction of the swing and fixed scroll wraps 59 and 61, respectively. And compresses the refrigerant sucked into the outer edges of the fixed scroll wraps 59 and 61 to the center thereof, and discharges the refrigerant sucked into the center portion of the fixed scroll wrap 59 and 61 to the rear head housing 57 through a discharge hole penetrated through the center of the finish surface of the compression unit housing 51. It is.

On the other hand, the control unit 7 is a part for controlling the operation of the drive unit 3, as shown in FIG. 2 is electrically connected to the stator 35 of the drive unit 3 to remove the stator 35 to the rotor 41 is rotated to drive or stop.

To this end, the controller 7 includes a cover housing 63, a PCB 65 mounted therein, and various driving circuits and elements 67 mounted on the PCB 65, as shown in FIG. As shown in FIG. 2, the cover housing 63 is coupled to the front end of the driving unit 3 so as to form the outer body of the control unit 7 so as to mount various electronic components therein. In addition, various driving circuits and elements 67 mounted on the PCB 65 are operated by an external power source applied through the connection end 69 to control the rotation of the driving unit 3. The control unit 7 is detachably coupled to the driving unit terminal assembly 10 by protruding the control terminal 71 at a point corresponding to the driving unit terminal assembly 10, and the control unit terminal 71 includes various driving circuits and elements ( As in the case of 67, the control unit 7 and the driving unit 3 are electrically connected to the PCB 65.

Now, the operation of the motor-driven compressor 1 according to the present invention configured as described above is as follows.

In order to compress the refrigerant by the motor-driven compressor 1 of the present invention, an external power source is first applied to the control unit 7 through the connection end 69, and the control unit 7 again supplies various driving circuits and elements 67. The winding coil 33 of the stator 35 of the drive unit 3 is fed through the control unit terminal 71 and the drive terminal assembly 10 via the stator 35.

To this end, as shown in FIG. 2, the control unit terminal 71 is inserted into the terminal hole 19 of the magmate terminal 15 through the insertion hole 91 of the driving unit assembly assembly 10. 15 is electrically connected to the magnet terminal 15, and the insertion terminal 89 of the axial piece 73 is crimped with the magnet wire 36, so that the control terminal 71 is the magnet terminal 15. It is electrically connected to the magnet wire 36 through) to feed the stator 35.

However, at this time, since the connection surface of the drive terminal assembly 10 into which the control unit terminal 71 is inserted is located on the same plane or inside the end surface of the coil end 34 of the stator 35, the drive terminal assembly 10 A portion of the drive housing 31 is installed does not protrude toward the control unit 7.

On the other hand, when the stator 35 of the drive unit 3 is excited as described above, the rotor 41 is rotated inside the stator 35 by the interaction of the stator 35 and the rotor 41 according to the motor driving principle. It rotates around high speed 37.

Accordingly, the turning scroll 53 of the compression unit 5 coupled to the rear end of the rotating shaft 37 also rotates at high speed in synchronism with the rotating shaft 37. As the turning scroll 53 rotates at high speed, spiral The scroll wrap 59 of the swinging scroll 53 formed in the form interacts with the scroll wrap 61 of the fixed scroll 55 that is matched to pivot and fix the refrigerant at the outer edges of the swing and fixed scroll wrap 59, 61. A series of refrigerant compression operations by the compressor 1 are completed by collecting the scroll wraps 59 and 61 at the center and discharging them at a high pressure through the rear head housing 57.

1 compressor 3 drive unit
5 compression unit 7 control unit
10: drive unit terminal assembly 11: the first terminal housing
13: second terminal housing 15: magmate terminal
17: cover member 19: terminal hole
21: finish surface 23: refrigerant inlet
25 stator core 31 drive housing
36: magnet wire 63: cover housing
67 drive circuit and device 69 connection terminal
71: control unit terminal

Claims (3)

The stator 35 is fixed to the inner circumferential surface of the drive housing 31, and the coil 33 is wound around the stator core 25 so that a through hole is formed along the axis. A drive unit 3 for generating a rotational driving force by the interaction of the rotor 41 rotatably axially supported;
A swing scroll 53 coupled to one end of the drive unit 3 and synchronously rotated by a rotational driving force generated by the drive unit 3, a fixed scroll 55 formed to correspond to the swing scroll 53, and Compression unit (5) for compressing the refrigerant flowing into the drive housing 31 through the refrigerant inlet port 23 by the compression action of the swinging scroll (53) and the fixed scroll (55);
A control unit (7) electrically connected to the stator (35) of the drive unit (3) through a control unit terminal (71) to control the operation of the drive unit (3); And
A drive terminal assembly 10 connected to the coil end 34 of the stator 35 to be electrically connected and electrically connected to the control unit 7,
The coil end 34 is connected by the coupling of the first terminal housing 11 and the second terminal housing 13 of the drive unit assembly 10,
The first terminal housing 11 forms an outer body and is opened toward the controller 7 so as to be attached to an end surface of the stator core 25 so that the magnet wire 36 is inserted therethrough.
The second terminal housing 13 is matched to the open side of the first terminal housing 11 to fix the magnet wire 36 between the first terminal housing 11 and to be electrically connected at the same time. There is,
The drive unit assembly 10,
One end is inserted into the second terminal housing 13 to be in close contact with the magnet wire 36, and the terminal along the stator 35 axis toward the control unit 7 is inserted so as to be connected to the control terminal 71. A plurality of magmate terminals 15 on which balls 19 are formed; And
A cover member detachably coupled to the open side of the second terminal housing 13 to prevent the magnet terminal 15 from being squeezed from the magnet wire 36 but detached from the second terminal housing 13. 17); electric compressor comprising a. delete The method according to claim 1,
The magmate terminal 15,
An axial piece (73) extending along the stator (35) axis in contact with the magnet wire (36); And
And a radial piece (75) extending in the radial direction of the stator (35) from one end of the axial piece (73) to insert the control terminal (71).

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