# US 2014/0154122 A1 · Scroll Fluid Machine

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- Number: US 2014/0154122 A1
- Document ID: US20140154122A1
- Status: Published application
- Kind: A1
- Application number: 13/953,335
- Filed: 2013-07-29
- Published: 2014-06-05
- Earliest claimed: 2012-11-30
- Assignees: Hitachi Industrial Equipment Systems Co., Ltd.
- Applicants: Hitachi Industrial Equipment Systems Co., Ltd.
- Inventors: Kosuke SADAKATA; Kiminori IWANO; Yoshio KOBAYASHI
- Web page: https://patentgrep.com/patent/US20140154122A1

## CPC

- F04C 29/04: Heating; Cooling (of machines or engines in general F01P); Heat insulation (heat insulation in general F16L59/00)
- F04C 15/0096: {Heating; Cooling (of machines or engines in general F01P)}
- F04C 18/0215: {where only one member is moving}
- F01C 21/10: Outer members for co-operation with rotary pistons; Casings (casings for rotary engines or machines in general F16M)
- F04C: ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS (engines F03C); ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F01C: ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES (internal-combustion aspects F02B53/00, F02B55/00)

## Abstract

A scroll fluid machine having: a compressor body including a fixed scroll and an orbiting scroll opposed to the fixed scroll, the orbiting scroll orbiting; a drive shaft connected to the orbiting scroll; a cooling fan provided on another side of the drive shaft opposite to the orbiting scroll, the cooling fan generating a cooling wind; and a cooling wind passage surrounded by walls in all directions, the cooling wind passage sending the cooling wind of the cooling fan to the compressor body, when the cooling wind passage being disposed left and the drive shaft being disposed right when seen from a direction in which the drive shaft extends, a size of the cooling wind passage in the left and right directions being smaller in upstream than downstream of the cooling wind passage.

## Claims

### Claim 1

A scroll fluid machine comprising:
a compressor body having a fixed scroll and an orbiting scroll, opposed to the fixed scroll, to make orbiting motions;
a drive shaft connected to the orbiting scroll;
a cooling fan provided on another side of the drive shaft opposite to the orbiting scroll, the cooling fan generating a cooling wind; and
a cooling wind passage surrounded by walls in all directions, the cooling wind passage sending the cooling wind of the cooling fan to the compressor body,
wherein assuming that the cooling wind passage is disposed left and the drive shaft is disposed right, as seen from a direction in which the drive shaft extends, a size of the cooling wind passage in the left and right directions is smaller in upstream than downstream of the cooling wind passage.

### Claim 2 (depends on 1)

The scroll fluid machine according to claim 1, wherein
in the cooling wind passage, an inside of an outlet is closer to the drive shaft than an inside of an inlet is.

### Claim 3 (depends on 1)

The scroll fluid machine according to claim 1, wherein
the dimension of the cooling wind passage in upper and lower directions is larger upstream than downstream.

### Claim 4 (depends on 1)

The scroll fluid machine according to claim 1, wherein
a fan casing having the cooling fan disposed therein and the cooling wind passage are connected by a bend.

### Claim 5 (depends on 1)

The scroll fluid machine according to claim 1, wherein
the cooling wind passage is connected to an introduction duct supplying the cooling wind to the compressor body.

### Claim 6 (depends on 5)

The scroll fluid machine according to claim 5, wherein
an outside of the cooling wind passage is connected to an introduction wall of the introduction duct, and the introduction wall is inclined inward from upstream to downstream.

### Claim 7

A scroll fluid machine comprising:
a compressor body compressing air;
a drive shaft driving the compressor body;
a cooling fan provided on a side of the drive shaft opposite to the compressor body, the cooling fan generating a cooling wind; and
a cooling wind passage sending the cooling wind of the cooling fan to the compressor body,
the cooling wind passage comprising an inside wall near the drive shaft and an outside wall far from the drive shaft, and a distance between the inside wall and the outside wall on an upstream side being smaller than a distance between the inside wall and the outside wall on a downstream side.

### Claim 8 (depends on 7)

The scroll fluid machine according to claim 7, wherein
the inside wall is inclined inward from upstream to downstream.

### Claim 9 (depends on 7)

The scroll fluid machine according to claim 7, wherein
the cooling wind passage comprises an upper side wall on an upper side and a lower side wall on a lower side when the outside wall is disposed left and the inside wall is disposed right, and a distance between the upper side wall and the lower side wall on the upstream side is larger than a distance between the upper side wall and the lower side wall on the downstream side.

### Claim 10 (depends on 7)

The scroll fluid machine according to claim 7, wherein
a fan casing having the cooling fan disposed therein and the cooling wind passage are connected by a bend.

### Claim 11 (depends on 7)

The scroll fluid machine according to claim 7, wherein
the cooling wind flowed in the cooling wind passage is supplied to the compressor body via an introduction duct.

### Claim 12 (depends on 11)

The scroll fluid machine according to claim 11, wherein
the outside wall is connected to an introduction wall of the introduction duct, and the introduction wall is inclined inward from upstream to downstream.