KR20150109156A - Electric motor driven compressor - Google Patents

Abstract

The present invention relates to an electric compressor. According to one embodiment of the present invention, a mounting unit is expanded in an insertion slot of a magmate terminal wherein a magnet wire is inserted, and the magnet wire is mounted in the mounting unit, thereby preventing a connection defect of the magnet wire and stably controlling a driving unit.

Description

[0001] Electric motor driven compressor [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric compressor, and more particularly, to an electric compressor capable of preventing faulty connection between a driving unit and a control unit and stably controlling the operation of the driving unit.

Generally, a compressor used in an air conditioning system of an automobile sucks refrigerant that has been evaporated from an evaporator, converts it into a high-temperature and high-pressure state which is easy to be liquefied, and transfers it to a condenser.

Such a compressor includes a reciprocating type in which a compression mechanism that compresses refrigerant actually performs compression while performing a reciprocating motion and a rotary type in which compression is performed while rotating. In this case, a mechanical type And an electric type using a motor as a driving source.

The motor compressor uses a separate motor to drive the compressor. In this case, the rotation speed of the motor is controlled by the inverter of the motor compressor.

Generally, an electric compressor is provided with a housing having a suction port and a discharge port on an outer circumferential surface thereof, a driving unit mounted on one side of the housing to generate a rotational driving force, a compression mechanism for compressing the refrigerant by receiving driving force from the driving unit, And a control unit for controlling the operation of the control unit.

Here, the driving unit includes a stator having a coil bundle wound thereon and a rotor rotatably installed in the hollow of the stator, and when the current is applied to the coil, the rotor rotates by the motor operating principle to generate the rotating driving force.

The control unit includes an inverter, and the inverter is electrically connected to the driving unit through the terminal assembly to control operation of the compression mechanism by controlling power supplied to the coil of the stator.

FIG. 1 is an exploded perspective view showing a conventional terminal assembly, and FIG. 2 is a cross-sectional view showing a conventional electrical connection structure of a terminal assembly and a stator.

1, the terminal assembly 10 includes a first terminal housing 20 of a female type, a second terminal housing 30 of a male type coupled to one side of the first terminal housing 20, A plurality of magmate terminals 40 coupled to the seating grooves 31 of the terminal housing 30 and a cover member 50 coupled to one side of the second terminal housing 30 to receive the magmate terminals 40, .

The magnetomotive terminal 40 includes a terminal connection portion 41 electrically connected to the control portion terminal inserted through the insertion hole 51 of the cover member 50 and a terminal connection portion 41 formed at one side of the terminal connection portion 41 And a wire connecting piece (42) electrically connected to the magnet wire (3) extending from one side of the coil end (2) of the stator (1). The insertion slot 43 is formed along the longitudinal direction of the wire connecting piece 42 so as to insert the magnet wire 3 into one side of the wire connecting piece 42.

1 and 2, the magnet wire 3 extending outward from one side of the coil end 2 of the stator 1 is inserted into the insertion groove 21 of the first terminal housing 20, And is press-fitted into the press-fit groove 32 of the two-terminal housing 30.

At this time, the press-fit groove 32 is communicated to one side of the seating groove 31 in which the magnetomatic terminal 40 is seated, and the magnetomotive terminal 40 is connected to the wire connecting piece 42 when the seating groove 31 is seated. And is inserted into the press-fit groove 32.

That is, the magnet wire 3 is inserted into the first terminal housing 20 along the first direction through the insertion groove 21 of the first terminal housing 20, Is inserted into the insertion slot (43) of the wire connecting piece (42) inserted in the press-fit groove (32) along the second direction perpendicular to the first direction.

3 is a cross-sectional view showing a connection structure of a conventional magnet-wire terminal and a magnet wire.

When the second terminal housing 30 is coupled to the first terminal housing 20 after the magnet wire 3 is inserted into the first terminal housing 20 through the insertion groove 21, Is urged toward the bottom surface of the first terminal housing (20) by the wire connecting piece (42) of the magnetomotive terminal (40).

At this time, the magnet wire 3 is inserted along the longitudinal direction of the insertion slot 43 cut into the wire connecting piece 42, and a cutter 44 formed on both sides of the insertion slot 43 in this process, The cover of the magnet wire 3 is peeled off and the magnet wire 3 and the magnetomain terminal 40 are electrically connected.

3, the magnet wire 3 has two bundles. At this time, as the insertion slot 43 is opened due to the magnet wire 3 inserted at this time, The magnet wire 3 to be inserted next has a problem that the coating is not peeled off by the cutter 44 so that the conduction failure is caused.

The magnet wire 3 can not be inserted along the longitudinal direction of the insertion slot 43 and is pushed by the wire connecting piece 42 so that the bottom surface of the first terminal housing 20 There is a problem that conduction failure occurs between the magnet wire 3 and the magnetomotive terminal 40 when the magnet wire 3 is bent in the plane direction.

KR 10-2013-0025601 A (March 3, 2013 open)

SUMMARY OF THE INVENTION The present invention has been conceived to solve the problems as described above, and one embodiment of the present invention is to provide a magnetoresistive device in which a magnetoresistance terminal The object of the present invention is to provide an electric compressor.

According to a preferred embodiment of the present invention, there is provided a vacuum cleaner comprising: a housing having a suction port and a discharge port separated from each other on an outer circumferential surface; A driving unit mounted on one side of the housing and generating a rotational driving force by an interaction between a stator in which a coil bundle is wound and a rotor rotatably installed in the hollow of the stator; A compression mechanism mounted on one side of the driving unit and adapted to compress a refrigerant received through the suction port by receiving a driving force from the driving unit; And a control unit which is mounted on the other side of the driving unit and is electrically connected to the stator through a terminal assembly including a magmate terminal to control the operation of the driving unit, Wherein an insertion slot having a width larger than the width of the insertion slot is formed on one side of the insertion slot so that the magnet wire is inserted thereinto so that the magnet wire extended from the insertion slot is inserted into the insertion slot. / RTI >

Here, the terminal assembly includes a terminal housing into which one end of the magnet wire is inserted; A magmatic terminal coupled to one side of the terminal housing and electrically connected to the magnet wire; And a control terminal coupled to one side of the magnetomule terminal and electrically connected to the control unit.

A protrusion is formed on the bottom surface of the terminal housing so as to face the insertion slot, and when the magnet wire is inserted into the insertion slot, the magnet wire is supported by the protrusion.

At this time, a plurality of the seating portions are spaced apart from each other along the longitudinal direction of the insertion slot.

At this time, the seat portion may be formed in a circular or polygonal shape.

The magnetomotive terminal further includes a terminal connection portion to which one end of the control terminal is connected and a wire connection piece formed by bending at one side of the terminal connection portion and having the insertion slot formed therein.

At this time, when the magnet wire is inserted into the insertion slot, the cover of the magnet wire is peeled off by a cutter formed on both sides of the insertion slot, and the magnet wire and the magnetomain terminal are electrically connected.

According to an embodiment of the present invention, a seating portion having a width greater than the width of the insertion slot is formed in the insertion slot of the magnetomain terminal, thereby preventing deformation of the insertion slot due to insertion of the magnet wire, Defects can be prevented.

In addition, since the magnet wire is supported by the protrusion formed on the bottom surface of the terminal housing, it is possible to prevent the magnet wire from being assembled poorly when the magnet wire is inserted.

1 is an exploded perspective view of a conventional terminal assembly;
2 is a cross-sectional view showing an electrical connection structure of a conventional terminal assembly and a stator.
3 is a cross-sectional view showing a connection structure of a conventional magnet port and a magnet wire.
4 is a cross-sectional view of an electric compressor according to an embodiment of the present invention.
5 is a perspective view of a first terminal housing according to an embodiment of the present invention;
FIG. 6 is a schematic view schematically showing the structure of a magmate terminal and a protrusion according to an embodiment of the present invention; FIG.
7 is a cross-sectional view illustrating a connection structure of a magnet wire and a magnet wire according to an embodiment of the present invention;
8 is a cross-sectional view illustrating a connection structure of a magnet wire and a magnet wire according to another embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of an electric compressor according to the present invention will be described with reference to the accompanying drawings. In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation.

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

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, Embodiments that include components replaceable as equivalents in the elements may be included within the scope of the present invention.

In addition, although the following embodiments describe a scroll compressor in which a compression mechanism for compressing refrigerant by fixed scroll and orbiting scroll is specifically described, the present invention is not limited to this, and a motor may be used as a drive source of the compression mechanism It is possible to apply to all motor compressors.

Example

4 is a cross-sectional view of an electric compressor according to an embodiment of the present invention.

The motor-driven compressor 100 according to an embodiment of the present invention includes a housing 200 formed in a substantially hollow cylindrical shape, a driving unit 300 mounted on one side of the housing 200 to generate a driving force, And a control unit 500 mounted on the other side of the driving unit 300 and controlling the operation of the driving unit 300. The control unit 500 controls the operation of the driving unit 300,

Here, the housing 200 is an overall appearance of the motor-driven compressor 100 according to an embodiment of the present invention. The housing 200 includes a driving unit housing 210 in which the driving unit 300 and the compression mechanism unit 400 are mounted, A head housing 220 coupled to one side of the housing 210 and having an inverter for controlling the operation of the driving unit 300 and a cover housing 230 coupled to the rear side of the driving unit housing 210, do.

A suction port 214 for sucking the refrigerant into the suction chamber 213 is formed in one side of the outer circumferential surface of the drive housing 210. A discharge port 231 for supplying the refrigerant to the outside is formed at one side of the outer circumferential surface of the cover housing 230 Is formed.

At this time, the shape of the driving unit housing 210, the head housing 220, and the cover housing 230 can be variously modified, and the entire housing 200 can have various configurations.

For example, the driving unit housing 210 may include two parts, a front housing 211 and a rear housing 212, which are opposed to each other as shown in FIG. 4. The front housing 211 and the rear housing 212 Or the drive housing 210 and the head housing 220 or the drive housing 210 and the cover housing 230 may be integrally formed.

A space portion forming a suction chamber 213 is formed in the driving housing 210, and a driving portion 300 is mounted on one side of the space portion.

Here, the driving unit 300 includes a driving motor including a stator 310 and a rotor 320.

The stator 310 has a cylindrical shape passing through the center and is mounted inside the driving unit housing 210 and a plurality of bundles of coils 311 are wound around the stator 310.

The rotor 320 is rotatably mounted on the inner side of the stator 310 and includes a rotating shaft 321 rotatably inserted into the central through hole of the stator 310 and disposed along the center axis, And a permanent magnet 322 attached to the outer circumferential surface of the rotating shaft 321.

A magnetic field is formed around the stator 310 when the current flows through the winding coil 311 of the stator 310. The magnetic field is generated around the stator 310 by the interaction between the stator 310 and the permanent magnet 322, The shaft 321 is driven to rotate.

A first bearing receiving portion 216 is fixed to the bottom surface of the front housing 211 and a first bearing 215 is fixed to the bottom surface of the front housing 211. A second bearing 217 is provided on the bottom surface of the rear housing 212 And a second bearing receiving portion 218 which is fixedly installed is protruded.

At this time, the front end of the rotating shaft 321 is rotatably supported by the first bearing 215, and the rear end is rotatably supported by the second bearing 217. [

A suction port 214 is formed at one side of the outer circumferential surface of the drive housing 210 so that the refrigerant can be sucked in. The refrigerant sucked into the suction chamber 213 through the suction port 214 is sucked Is compressed to a high pressure in the compression chamber 430 and is discharged to the discharge chamber 440 and then supplied to the outside through a discharge port 231 formed separately from the suction port 214.

The compression mechanism 400 for compressing refrigerant is mounted on one side of the driving unit 300 and the cover housing 230 is coupled to the rear side of the driving unit housing 210 to close the open end of the driving unit housing 210.

The compression mechanism 400 according to an embodiment of the present invention includes a fixed scroll 410 and an orbiting scroll 420 installed to face each other. However, the present invention is not limited to this, and the compression mechanism 400 of the present invention can be applied to all types of compressing (compressing) compressing refrigerant by receiving the rotational driving force through the rotating shaft 321, It goes without saying that the mechanism part is applicable.

The fixed scroll 410 includes a fixed end plate 411 in the form of a disk and a fixed lap 412 protruding from the one surface of the fixed end plate 411 so as to converge toward the center. The orbiting scroll 420 includes a circular end plate 421 and a orbiting wrap 422 protruding from the one side of the end plate 421 so as to converge toward the center to face the stationary wrap 412, .

At this time, the orbiting scroll 420 is eccentrically joined to one end of the rotating shaft 321 by the eccentric bush 323, and the fixed scroll 410 is fixed to one side of the driving part 300 so as to face the orbiting scroll 420 Respectively. Therefore, when the rotary shaft 321 rotates, the orbiting scroll 420 revolves with respect to the fixed scroll 410.

The fixed lap 412 and the orbiting lap 422 come into contact with each other at a plurality of points while the orbiting scroll 412 and the orbiting wrap 422 are rotated The space is divided into a plurality of compression chambers 430.

That is, when the orbiting scroll 420 revolves, the fixed scroll 410 and the orbiting scroll 420 are matched with each other. By the relative rotation of the fixed lap 412 and the orbiting lap 422, The refrigerant sucked into the outer periphery of the orbiting wrap 422 is compressed at its center and discharged through a discharge port 413 formed through the center of the fixed scroll 410. [ The high-pressure refrigerant discharged to the discharge chamber 440 through the discharge port 413 is supplied to the outside through the discharge port 231.

The head housing 220 is coupled to the front of the driving unit housing 210 and includes a PCB 510 and a controller 500 including various driving circuits and elements mounted on the PCB 510.

The control unit 500 includes an inverter for converting DC power to AC power, and controls the amount of compression of the refrigerant by controlling the rotation speed of the driving motor to maintain the vehicle interior at a desired temperature.

To this end, a terminal assembly 600 is mounted on one side of the stator 310 as a means for electrically coupling the winding coil 311 of the stator 310 to the control unit 500.

The terminal assembly 600 includes a terminal housing 610 into which the magnet wire 313 extending from the coil end 312 of the stator 310 is inserted and a magnet wire 610 coupled to one side of the terminal housing 610, And a control terminal 630 coupled to one side of the magnetomotive terminal 620 and electrically connected to the control unit 500. The control unit terminal 620 is electrically connected to the control unit 500,

The terminal assembly 600 according to an embodiment of the present invention includes a first terminal housing 611 of a female type and a magnet wire 313 protruding radially outward from one side of the outer circumferential surface of the coil end 312 of the stator 310, And the second terminal housing 612 of the male type.

The control unit terminal 630 is inserted in the direction of the magnet wire 313 through the terminal hole 623 (see Fig. 6) of the magnetata terminal 620 and the magnet wire 313 of the stator 310 is inserted into the magnetata terminal 620 And the control unit terminal 630. The control unit terminal 630 is electrically connected to the control unit 500. [

5) for supporting the magnet wire 313 on the inner bottom surface of the first terminal housing 611 may include at least one protrusion 614 (see FIG. 5) for supporting the magnet wire 313 on the inner bottom surface of the first terminal housing 611. In this case, And at least one seating portion 625 (see FIG. 7) is formed in the insertion slot 624 (see FIG. 7) of the magnetomotive terminal 620 in a protruded manner, .

FIG. 5 is a perspective view of a first terminal housing according to an embodiment of the present invention, and FIG. 6 is a schematic view schematically illustrating a structure of a magmate terminal and a protrusion according to an embodiment of the present invention.

5, the first terminal housing 611 according to an embodiment of the present invention is formed in a hollow shape having a space formed therein and one side opened, and a magnet wire 313 is inserted into the first terminal housing 611 A plurality of insertion grooves 613 are formed along one side edge.

A plurality of protrusions 614 are protruded from the bottom surface of the first terminal housing 611 and the protrusions 614 are spaced apart from each other by a predetermined distance so as to correspond to the respective insertion recesses 613.

6, the magnetomotive terminal 620 includes a terminal connection portion 621 in which a terminal hole 623 is formed so that one end of the control portion terminal 630 (see FIG. 4) is connected to the terminal connection portion 621 And a wire connecting piece 622 formed by cutting the insertion slot 624 along the longitudinal direction so that the magnet wire 313 is inserted.

The first terminal housing 611 is coupled to a second terminal housing 612 (see FIG. 4), wherein a magma terminal 620 and a cover member 640 (see FIG. 4) Respectively.

When the first terminal housing 611 and the second terminal housing 612 are coupled to each other, the wire connecting piece 622 of the magnetomotive terminal 620 moves the magnet wire 313 to the first terminal housing 612, (611).

At this time, the magnet wire 313 is inserted along the insertion slot 624 of the wire connection piece 622, and the protrusion 614 serves to support the magnet wire 313 inserted along the insertion slot 624 .

That is, since one side of the magnet wire 313 is supported by the protrusion 614, the magnet wire 313 is not bent toward the bottom surface of the first terminal housing 611 when the wire connecting piece 622 is pressed So that it can be fitted into the insertion slot 624 of the wire connecting piece 622.

FIG. 7 is a cross-sectional view illustrating a connection structure of a magnet wire and a magnet wire according to an embodiment of the present invention, and FIG. 8 is a cross-sectional view illustrating a connection structure of a magnet wire and a magnet wire according to another embodiment of the present invention to be.

According to an embodiment of the present invention, an insertion slot 624 is formed in the wire connecting piece 622 of the magnetomotive terminal 620 and a plurality of seating portions 625 are formed along the longitudinal direction of the insertion slot 624. [ . At this time, the seating portion 625 is formed to have a width larger than the width of the insertion slot 624, and an expansion hole 626 is formed inside the insertion slot 624.

When the driving unit 300 is a three-phase motor, the two magnet wires 313 are inserted into the first terminal housing 611 through the insertion groove 613.

When the terminal assembly 600 is assembled, the wire connecting piece 622 of the magnetomotive terminal 620 presses one side of the magnet wire 313 toward the bottom surface of the first terminal housing 611, The wire 313 is moved in the opposite direction along the insertion slot 624 of the wire connecting piece 622 and is inserted into the insertion slot 624.

Both side edges of the insertion slot 624 are formed by a sharp cutter 624a so that while the magnet wire 313 moves along the insertion slot 624, the covering of the magnet wire 313, such as enamel coating, And the cutter 624a, which grasps the sheath of the magnet wire 313, is brought into electrical contact with the core wire of the magnet wire 313. [

3, when the two magnet wires 3 arranged vertically along the longitudinal direction of the insertion slot 43 are inserted into the insertion slot 43 in order, the magnet wires 3 inserted first, The cutter 44 on both sides of the insertion slot 43 is opened by elastic deformation by the elastic member 3. For this reason, there arises a problem that the magnet wire 3 to be inserted at the back causes defective energization with the magnetomotive terminal 40.

In order to solve this problem, the magnetomotive terminal 620 of the motor-driven compressor 100 according to an embodiment of the present invention includes at least one seating portion 625, which is a space portion along the longitudinal direction of the insertion slot 624, And the magnet wire 313 fitted in the insertion slot 624 is seated on the seat portion 625.

At this time, the seating portion 625 has a width larger than the width of the insertion slot 624, and one side of the seating portion 625 is in electrical contact with the core wire through the covering of the magnet wire 313. Preferably, the maximum width of the seating portion 625 is equal to or larger than the diameter of the magnet wire 313.

According to the embodiment of the present invention, the magnet wire 313 is moved along the insertion slot 624 and is cut at one side to be seated on the seating portion 625. The diameter of the magnet wire 313 It is possible to prevent the elastic deformation of the cutter 624a that has occurred due to the small width of the slot 624 and to prevent the failure of energization between the magnet wire 313 and the magnetomotive terminal 620. [

The seating portion 625 has a width enough to accommodate the magnet wire 313 therein and not to be elastically deformed by the magnet wire 313 seated on the seating portion 625 And the shape of the seating part 625 may be variously selected as needed, such as a circular shape or a polygonal shape.

For example, the embodiment shown in FIG. 7 shows an example in which the seating portion 625 is formed in a trapezoidal shape, and the embodiment shown in FIG. 8 shows an example in which the seating portion 625 is circular, The mounting portion 625 may be formed in a polygonal shape such as an ellipse, a square, or a pentagon.

100: electric compressor (200): housing
300: driving part 310:
313: Magnet wire 320: Rotor
400: compression mechanism part 410: fixed scroll
420: orbiting scroll 500:
600: Terminal assembly 610: Terminal housing
620: Magnet terminal 621: Terminal connection
622: wire connecting piece 624: insertion slot
624a: Cutter 625:
630: control terminal 640: cover member

Claims (7)

A housing (200) having a suction port (214) and a discharge port (231) separated from each other on an outer peripheral surface;
The rotational driving force is generated by the interaction between the stator 310 in which the bundle of coils 311 is wound and the rotor 320 which is rotatably installed in the hollow of the stator 310, A driving unit 300 for generating a driving signal;
A compression mechanism 400 mounted on one side of the driving unit 300 and adapted to receive a driving force from the driving unit 300 to compress the refrigerant sucked through the suction port 214; And
A control unit 500 mounted on the other side of the driving unit 300 and electrically connected to the stator 310 via the terminal assembly 600 including the magnetomotive terminal 620 to control the operation of the driving unit 300 ), ≪ / RTI >
The magnetomotive terminal 620 includes:
An insertion slot 624 is formed in one side of the stator 310 so that the magnet wire 313 extending from the coil end 312 of the stator 310 is inserted and a side of the insertion slot 624 Wherein a seating portion (625) having a width larger than the width of the insertion slot (624) is formed in an enlarged manner.
The terminal assembly (600) according to claim 1,
A terminal housing 610 into which one end of the magnet wire 313 is inserted;
A magmate terminal 620 coupled to one side of the terminal housing 610 and electrically connected to the magnet wire 313; And
And a control terminal (630) coupled to one side of the magnetomotive terminal (620) and electrically connected to the controller (500).
The method of claim 2,
A protrusion 614 protrudes from the bottom surface of the terminal housing 610 so as to face the insertion slot 624 and protrudes from the protrusion 614 when the magnet wire 313 is inserted into the insertion slot 624 And the magnet wire (313) is supported by the magnet wire (313).
The method according to claim 1,
Wherein the plurality of seating portions (625) are spaced from each other along the longitudinal direction of the insertion slot (624).
The method according to claim 1,
Wherein the seating portion (625) is formed in a circular or polygonal shape.
[3] The apparatus of claim 2, wherein the magnetomotive terminal (620)
A terminal connecting portion 621 to which one end of the control unit terminal 630 is connected and a wire connecting piece 622 bent at one side of the terminal connecting portion 621 and having the insertion slot 624 cut Motor compressor.
The method according to claim 1,
The cover of the magnet wire 313 is peeled off by the cutter 624a formed on both sides of the insertion slot 624 when the magnet wire 313 is inserted into the insertion slot 624 and the magnet wire 313 ) And the magnetomotive terminal (620) are electrically connected to each other.

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