# US 10,480,508 B2 · Scroll compressor

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- Number: US 10,480,508 B2
- Document ID: US10480508B2
- Status: Granted
- Kind: B2
- Application number: 15/526,417
- Filed: 2015-02-12
- Published: 2017-11-02
- Granted: 2019-11-19
- Earliest claimed: 2015-02-12
- Assignees: Mitsubishi Electric Corporation
- Applicants: Mitsubishi Electric Corporation
- Inventors: Tomokazu Matsui; Yuji Takamura
- Web page: https://patentgrep.com/patent/US10480508B2

## CPC

- F04C 18/0215: {where only one member is moving}
- F04C 29/0021: {Systems for the equilibration of forces acting on the pump (interstice adjustment other than by fluid pressure F01C21/102)}
- F04C 29/0057: {for eccentric movement}
- F04C 23/008: {Hermetic pumps}
- F04C 2210/263: HFO1234YF
- F04C 2240/50: Bearings
- F04C 2240/60: Shafts
- F04C 2240/807: Balance weight, counterweight
- F04C: ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS (engines F03C); ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS

## Abstract

A scroll compressor includes a compressing mechanism unit including a fixed scroll that is fixedly provided in a shell and an orbiting scroll that moves around the fixed scroll, the compressing mechanism unit compressing fluid; a main shaft including an eccentric shaft portion at one end thereof that transmits a rotational driving force to the orbiting scroll; a slider having a slide groove in which the eccentric shaft portion is slidably fitted; and an orbital bearing provided to the orbiting scroll that rotatably supports the slider. The slider is provided on the inner peripheral side of the orbital bearing when seen in a direction of a center axis of the slider. The center axis of the slider is eccentric in one direction from an axis of rotation of the main shaft and a center of gravity of the slider is eccentric in an opposite direction.

## Claims

### Claim 1

A scroll compressor comprising:
a compressing mechanism unit including a fixed scroll fixed in a shell and an orbiting scroll configured to move around the fixed scroll, the compressing mechanism unit being configured to compress fluid;
a main shaft including an eccentric shaft portion at one end and being configured to transmit a rotational driving force to the orbiting scroll;
a slider having a slide groove in which the eccentric shaft portion is slidably fitted; and
an orbital bearing provided to the orbiting scroll and rotatably supporting the slider, wherein
the slider is provided only on an inner peripheral side of the orbital bearing when seen in a direction of a center axis of the slider,
the center axis of the slider is eccentric in one direction from an axis of rotation of the main shaft,
the slider includes a balance weight portion for adjusting a center of gravity of the slider, and
the center of gravity of the slider is eccentric in a direction opposite to the one direction from the axis of rotation of the main shaft.

### Claim 2 (depends on 1)

The scroll compressor of claim 1, wherein a distance between the center of gravity of the slider and the axis of rotation of the main shaft is larger than a distance between the center axis of the slider and the axis of rotation of the main shaft.

### Claim 3 (depends on 1)

The scroll compressor of claim 1, wherein the slider has a hollow portion that is continuous with the slide groove.

### Claim 4 (depends on 1)

The scroll compressor of claim 1, wherein the fluid is an HFO refrigerant.

### Claim 5 (depends on 1)

The scroll compressor of claim 1, wherein the hollow portion of the slider is configured to adjust the center of gravity of the slider.

### Claim 6 (depends on 1)

The scroll compressor of claim 1, wherein the balance weight portion is configured not to project to an outer peripheral side of the orbital bearing.

### Claim 7

A scroll compressor comprising:
a compressing mechanism unit including a fixed scroll fixed in a shell and an orbiting scroll configured to move around the fixed scroll, the compressing mechanism unit being configured to compress fluid;
a main shaft including an eccentric shaft portion at one end and being configured to transmit a rotational driving force to the orbiting scroll;
a slider having a slide groove in which the eccentric shaft portion is slidably fitted; and
an orbital bearing provided to the orbiting scroll and rotatably supporting the slider; wherein
the slider is provided only on an inner peripheral side of the orbital bearing when seen in a direction of a center axis of the slider,
the center axis of the slider is eccentric in one direction from an axis of rotation of the main shaft,
the slider includes a balance weight portion for adjusting a center of gravity of the slider,
the center of gravity of the slider is eccentric in a direction opposite to the one direction from the axis of rotation of the main shaft, and
the slider has a hollow portion that is separate from the slide groove.