KR20230103331A - Cluster assembly and electric compressor comprising same - Google Patents

Abstract

A cluster assembly and an electric compressor including the same are disclosed. According to the present embodiment, the arrangement of the terminals of the cluster assembly is improved, thereby miniaturizing the electric compressor and improving assembly performance according to the package.

Description

Cluster assembly and electric compressor comprising the same

This embodiment relates to a cluster assembly for miniaturization of an electric compressor, and more particularly, to a cluster assembly and an electric compressor including the same.

Recently, in accordance with low-emission, high-fuel efficiency policies due to problems such as depletion of fossil fuels and environmental pollution, hybrid vehicles or electric vehicles using both fossil fuel and electricity as driving sources are in the spotlight, and research on them is being actively conducted.

A hybrid vehicle or an electric vehicle obtains power for propulsion of the vehicle through an electric motor. Accordingly, unlike the widely used mechanical compressors in vehicle air conditioning systems, there is a recent trend towards using electric compressors.

An electric compressor includes an electric motor that converts electrical energy into mechanical energy and an inverter that controls rotation of the electric motor. An electric motor of such an electric compressor generally includes a cylindrical rotor and a stator around which a coil is wound.

At this time, the rotor rotates as the current flows in the coil by the power supplied from the inverter, and the rotational force of the rotor is transmitted to the rotation shaft, and the mechanical means receiving the mechanical energy from the rotation shaft performs reciprocating or rotational motion. The refrigerant is compressed.

Accordingly, the electric compressor is provided with a terminal for receiving an output signal from the inverter at the end of the coil, and a housing for fixing the terminal.

A cluster assembly provided in a conventional electric compressor will be described with reference to the drawings.

1, the conventional cluster assembly 50 includes three coils (not shown) provided at the end of a coil (not shown) drawn from a coil (not shown) wound on a stator (not shown) of an electric motor (not shown). The terminal 51, the separable cluster 52 in which the terminal 51 is accommodated, and the separable cluster 52 coupled to one side of the electric motor are inserted so that the separable cluster 52 is connected to the electric motor. It includes a cluster body 56 to be fixed to one side of the. For reference, the terminal wire 53 is extended as shown in the drawing and 21 means a stator.

Looking more closely, the terminal 51 is drawn from a coil wound on a stator and provided at an end thereof in order to receive power of three phases (U, V, W phases) for driving the electric motor from the motor driving circuit. .

The terminal 51 is electrically connected to the place where the end of the coil wound on the stator is gripped, and coupling is generally performed through clamping.

In the conventional electric compressor 50 configured as described above, all of the terminals 51 are arranged looking in one direction, for example, they are arranged inclined when looking to the left, and the terminal wire 53 also has one side in the terminal 51, respectively. extends in the direction

In this way, when the terminal 51 and the terminal wire 53 are arranged, the overall layout is eccentric in one direction, causing interference when components inserted inside such as a rotor assembly or a motor bearing are press-fitted. .

In addition, since the terminal wires 53 come into close contact with each other to make surface contact, sticking or deformation may occur when the temperature rises.

Therefore, it is disadvantageous to the overall packaging of the cluster assembly and a countermeasure for improving the damage of the terminal wire 53 is required.

Korean Patent Publication No. 10-2014-0095798

The present embodiments are intended to provide a cluster assembly that can be used in a layout advantageous in packaging according to miniaturization of the electric compressor and an electric compressor including the same by improving the arrangement state of the terminal of the cluster assembly provided in the electric compressor.

A cluster assembly according to an embodiment of the present invention includes a terminal housing having a pair of first and second terminals and a third terminal branched in different directions; Terminal wires branched from the first to third terminals, respectively; and a cluster block in which a holder for fixing the terminal wire is installed.

The first and second terminals are inclined in the same direction, and the third terminal is inclined in an opposite direction to the first and second terminals.

The terminal wire may include first and second terminal wires drawn out from the first and second terminals, respectively; and a third terminal wire drawn out from the third terminal, and the first to third terminal wires are each independently branched.

The second to third terminal wires are characterized in that a fixed state is maintained by the holder in a non-contact state with each other.

The holder independently fixes the second to third terminal wires.

An insertion part into which the first to third terminal wires are inserted is formed in the cluster block.

The insertion part is disposed symmetrically with the first to third terminals based on the center of the cluster block.

The insertion part includes a first insertion part spaced apart from the first terminal by the shortest distance from the edge of the cluster block toward the inner side in the radial direction so that the first terminal is inserted.

The insertion unit includes a second insertion unit located below the edge of the cluster block in the first insertion unit; and a third insertion part spaced apart from the second insertion part along an edge of the cluster block.

An electric compressor according to one embodiment of the present invention includes a housing; a motor unit provided in the housing; a compression unit driven by the motor unit; an inverter unit coupled to one side of the housing and controlling an operation of the motor unit; and a cluster assembly electrically connecting the motor unit and the inverter unit and having one terminal disposed in the opposite direction to the other pair of terminals.

Embodiments of the present invention can promote miniaturization of the electric compressor by changing the arrangement direction of the first to third terminals to a position favorable for packaging.

According to the present embodiments, a cluster assembly and an electric compressor in which unnecessary interference is minimized can be manufactured because a space that is easy to assemble components can be secured.

In the present embodiments, damage due to heat generation is prevented because the terminal wires are arranged to be branched independently from each other.

1 is a perspective view showing a conventional cluster assembly;
2 is a longitudinal sectional view of an electric compressor in which a cluster assembly according to the present embodiment is installed.
3 is a plan view showing a cluster assembly according to the present embodiment;
4 is a view showing a comparison between a conventional cluster assembly and a cluster assembly according to this embodiment.

Advantages and features of the present disclosure, and methods of achieving them, will become clear with reference to embodiments described below in detail in conjunction with the accompanying drawings. However, the present disclosure is not limited to the embodiments disclosed below, but will be implemented in various different forms, and only the present embodiments make the disclosure of the present disclosure complete, and common knowledge in the art to which the present disclosure belongs. It is provided to fully inform the person who has the scope of the disclosure, and the disclosure is only defined by the scope of the claims. Like reference numbers designate like elements throughout the specification.

A component is said to be "connected to" or "coupled to" another component when it is directly connected or coupled to the other component or through another component in between. include all cases. On the other hand, when one component is referred to as “directly connected to” or “directly coupled to” another component, it indicates that another component is not intervened. “And/or” includes each and every combination of one or more of the recited items.

Terminology used herein is for describing embodiments and is not intended to limit the present disclosure. In this specification, singular forms also include plural forms unless specifically stated otherwise in a phrase. As used in the specification, "comprises." and/or "comprising" does not preclude the presence or addition of one or more other elements, steps, operations and/or elements.

Although first, second, etc. are used to describe various constituent elements, these constituent elements are not limited by these terms, of course. These terms are only used to distinguish one component from another.

A cluster assembly according to an embodiment of the present invention and an electric compressor including the same will be described with reference to the drawings. In particular, this embodiment improved the arrangement structure of terminals concentrated in a specific position by changing the eccentric arrangement structure of the terminals provided in the existing cluster assembly so that the overall balance was stably maintained.

For reference, FIG. 2 is a longitudinal cross-sectional view of an electric compressor in which a cluster assembly according to the present embodiment is installed, and FIG. 3 is a plan view illustrating the cluster assembly according to the present embodiment.

1 to 3, the electric compressor according to the present embodiment includes a housing 100, a motor unit 200, a compression unit 300, an inverter unit 400, and the motor unit 200. ) and the inverter unit 400, and a cluster assembly 500 in which one terminal is disposed in the opposite direction to the other pair of terminals.

The housing 100 forms the overall appearance of the electric compressor, and in this embodiment, it is composed of a front housing 110 and a rear housing 120.

The motor unit 200 is provided in the front housing 110 and provides power for the compression unit 300 to compress the refrigerant. The motor unit 200 includes a rotor 240 coupled to a rotational shaft 220 rotatably installed at the center of the front housing 110 and fixed to the front housing 110 so as to rotate the rotor 240. It includes a stator 260 disposed radially outward. The stator 260 includes a stator core 262 and a coil 264 wound around the stator core 262 .

The compression unit 300 is provided inside the rear housing 120, and between the orbiting scroll 320 coupled to the rotating shaft 220 through an eccentric bush, and between the front housing 110 and the rear housing 120. It includes a fixed scroll 340 that is fixed to the orbiting scroll 320 and forms a compression chamber in which the refrigerant is compressed.

In this way, as the compression unit 300 is connected to the motor unit 200 through the rotation shaft 220, the rotational force generated by the motor unit 200 is transmitted to the turning scroll 320 of the compression unit by the rotation shaft 220. can

The inverter unit 400 is provided on the outside of the housing 100 and coupled to the opposite side of the compression unit 300 based on the motor unit 200. The inverter unit 400 is electrically connected to the motor unit 200, supplies power to the motor unit 200 through external power and control signals, and controls its operation.

More specifically, the stator 260 forms an electromagnetic field by power applied from the inverter unit 400, and as the rotor 240 rotates by the electromagnetic field formed by the stator 260, the compression unit 300 is compressed. Rotational force for driving is generated.

The inverter unit 400 includes an inverter case 460 having a printed circuit board 420 on which switching elements (not shown) are provided and coupled to the housing 100 to receive the printed circuit board 420 therein. do.

The cluster assembly 500 according to this embodiment is coupled to one end of the stator 260, for example. The cluster assembly 500 includes a terminal housing 510 having a pair of first and second terminals 512 and 514 and a third terminal 516 diverging in different directions, and the first to third terminals 510. It includes terminal wires 520 branched from terminals 512, 514, and 516, and a cluster block 530 in which holders 532 for fixing the terminal wires 520 are installed.

When viewed from the top of the cluster block 530, the terminal housing 510 is located at the top, the first and second terminals 512 and 514 are inclined toward the left side based on the drawing, and the third terminal 516 ) is disposed inclined at a predetermined angle toward the right side on the basis of the drawing.

In this embodiment, all of the first to third terminals 512, 514, and 516 are not disposed facing one direction, and the third terminal 516 is disposed inclined toward the right to improve the layout of the cluster block 530. can contribute

That is, since the first to third terminals 512, 514, and 516 are not arranged facing one direction as before, a press-in space for packaging internal components such as a rotor assembly or a motor bearing can be secured.

In addition, compared to the existing cluster block, some area can be additionally secured, contributing to overall weight reduction, which can also contribute to reducing production cost through cost reduction.

In particular, in this embodiment, the first and second terminals 512 and 514 are inclined in the same direction, and the third terminal 516 is inclined in the opposite direction to the first and second terminals 512 and 514. Although shown as being, it is not necessarily limited to the above-described embodiment.

That is, it may be possible that the second to third terminals 514 and 516 are inclined in the same direction as a pair, and the first terminal 512 is inclined in the opposite direction.

The terminal wire 520 includes first and second terminal wires 522 and 524 drawn from the first and second terminals 512 and 514, respectively, and a third terminal wire drawn from the third terminal 516. (526).

Also, the first to third terminal wires 522, 524, and 526 are independently branched. In particular, the first to second terminal wires 522 and 524 extend to the left side of the drawing, and the third terminal wire 526 extends to the right side of the drawing.

In particular, since the insertion part 534 to be described later is disposed at the lower central position of the cluster block 530, the extension lengths of the first to third terminal wires 522, 524, and 526 are not unnecessarily long and are minimized. may be extended.

Since the first terminal wire 522 according to this embodiment extends independently without surface contact between the second terminal wire 524 and each other in the entire extended section, the temperature rise due to the surface contact occurs. Out is improved so that malfunctions or failures due to damage can be prevented in advance.

Since the third terminal wire 526 is independently disposed as shown in the drawing without contact with the first and second terminal wires 522 and 524, like the first terminal wire 522 described above, the second terminal Since it is not in contact with the wire 524, it can be used without causing a short circuit due to damage or the need for replacement.

The first terminal wire 522 extends via the insertion rib 600 provided in the first terminal 512 and extends to the shortest length in a state where the holder 532 to be described later is not installed.

The reason why the first terminal wire 522 is extended in this way is that the position of the insertion part 534, which will be described later, is changed to the lower side of the cluster block 530, and the shortest distance to the first terminal wire 522 is made. It is positioned so that it can be easily installed without installing the holder 532.

The second to third terminal wires 524 and 526 together with the first terminal wire 522 are maintained in a fixed state by the holder 532 in a non-contact state with each other.

Like the first terminal wire 522, the second terminal wire 524 has a shorter length compared to the previous one, so that even if one holder 532 is installed independently, it can be stably fixed.

Like the second terminal wire 524, the third terminal wire 526 is maintained independently fixed in the cluster block 530 by installing one holder 532 thereon.

That is, in this embodiment, since the holder 532 does not have to fix the second to third terminal wires 524 and 526 at the same time, even if only one is installed, the fixed state can be stably maintained.

Since the holder 532 only needs to fix one terminal wire, the overall size and weight are reduced, which can contribute to reducing the weight of the cluster block 530.

An insertion part 534 into which the first to third terminal wires 522 , 524 , and 526 are inserted is formed in the cluster block 530 .

The insertion part 534 is disposed symmetrically with the first to third terminals 512 , 514 , and 516 based on the center of the cluster block 530 .

The reason why the insertion part 534 is disposed in this way is to simplify the layout by maintaining the extension lengths of the first to third terminal wires 522, 524, and 526 constituting the aforementioned terminal wire 520 to the shortest length. It is to do.

In addition, this embodiment prevents temperature rise due to surface contact between the first to third terminal wires 522, 524, and 526, and minimizes the number of holders 532 to reduce overall weight and improve packaging performance. is to improve

The insertion part 534 is formed toward the inside in the radial direction from the edge of the cluster block 530 so that the first terminal 512 is inserted, and the first insertion spaced apart from the first terminal 512 by the shortest distance. It includes section 534a.

In addition, the insertion part 534 includes a second insertion part 534b located below the edge of the cluster block 530 in the first insertion part 534a, and the cluster block in the second insertion part 534b. and third inserts 534c spaced apart along the edge of 530 .

In the insertion part 534, the first insertion part 534a is disposed on the left side of the second insertion part 534b, and the third insertion part 534c is disposed on the right side. The layout of the cluster block 530 together with the three terminals 512 , 514 , and 516 may be improved and the extension lengths of the first to third terminal wires 522 , 524 , and 526 may be shortened. For reference, Cp represents the neutral point.

Referring to FIG. 4 attached, the conventional cluster assembly 50 has terminals arranged only in the direction indicated by the left arrow, so that the layout of the terminal wires is also biased to the left. In addition, due to the shape limitation of the cluster assembly 50, the first area S1 is limited to the area shown in the drawing.

In this embodiment, compared to the conventional cluster assembly, the first and second terminals 512 and 514 are disposed toward the left side, and the third terminal 516 is divided and disposed toward the right side, thereby changing the structure of the cluster block. It is improved so that the area is relatively reduced and the first area S2 is increased.

Therefore, the present embodiment can more simply improve the layout required for miniaturization of the electric compressor, secure space according to packaging, and prevent damage through independent arrangement of terminal wires.

In the above, one embodiment of the present invention has been described, but those skilled in the art can add, change, delete, or add components within the scope not departing from the spirit of the present invention described in the claims. The present invention can be variously modified and changed by the like, and this will also be said to be included within the scope of the present invention.

100: housing
200: motor part
300: compression unit
400: inverter unit
500: cluster assembly
510: housing terminal
512, 514, 516: Terminal 1, 2, 3
520: terminal wire
522, 524, 526: first, second, third terminal wire
530: cluster block
532: holder
534: insertion part
534a, 534b, 534c: first, second and third insertion parts

Claims (10)

a terminal housing in which a pair of first and second terminals and a third terminal diverging in different directions are formed;
Terminal wires branched from the first to third terminals, respectively; and
A cluster assembly comprising a cluster block in which a holder for fixing the terminal wire is installed. According to claim 1,
The first and second terminals are inclined in the same direction, and the third terminal is inclined in an opposite direction to the first and second terminals. According to claim 1,
The terminal wire may include first and second terminal wires drawn out from the first and second terminals, respectively;
Including a third terminal wire drawn out from the third terminal,
The first to third terminal wires are each independently branched cluster assembly. According to claim 3,
The cluster assembly in which the second to third terminal wires are maintained in a fixed state by the holder in a non-contact state with each other. According to claim 4,
The holder is a cluster assembly for independently fixing the second to third terminal wires. According to claim 2,
A cluster assembly in which an insertion portion into which the first to third terminal wires are inserted is formed in the cluster block. According to claim 6,
The insertion portion is disposed symmetrically with the first to third terminals based on the center of the cluster block. According to claim 6,
The insertion part is formed toward the inner side in the radial direction from the edge of the cluster block so that the first terminal is inserted, and includes a first insertion part spaced apart from the first terminal by the shortest distance. According to claim 8,
The insertion unit includes a second insertion unit located below the edge of the cluster block in the first insertion unit;
A cluster assembly including a third insert positioned spaced apart from the second insert along an edge of the cluster block. housing;
a motor unit provided in the housing;
a compression unit driven by the motor unit;
an inverter unit coupled to one side of the housing and controlling an operation of the motor unit; and
An electric compressor comprising a cluster assembly electrically connecting the motor unit and the inverter unit and having one terminal disposed in an opposite direction to another pair of terminals.

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