# US 2024/0200837 A1 · Refrigerant compressor for air-conditioning systems and method for operating a refrigerant compressor

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- Number: US 2024/0200837 A1
- Document ID: US20240200837A1
- Status: Published application
- Kind: A1
- Application number: 18/555,703
- Filed: 2022-10-26
- Published: 2024-06-20
- Earliest claimed: 2021-11-18
- Assignees: Hanon Systems
- Applicants: Hanon Systems
- Inventors: Torsten Gehm; Erik-Florian Falkus; Dennis Kroecker; Denis T.G. Wambeogo; Oliver Fischer
- Web page: https://patentgrep.com/patent/US20240200837A1

## CPC

- F04C 29/028: {Means for improving or restricting lubricant flow}
- F25B 31/02: of motor-compressor units
- F04C 18/0246: {Details concerning the involute wraps or their base, e.g. geometry}
- F04C 18/0215: {where only one member is moving}
- F04C 2280/00: Arrangements for preventing or removing deposits or corrosion
- F25B 31/00: Compressor arrangements
- F04C: ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS (engines F03C); ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F25B: REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS

## Abstract

A refrigerant compressor for air-conditioning systems and to a method for operating a refrigerant compressor, is based on the object of specifying a solution with which safe functioning of a refrigerant compressor is achieved and in which the effort during production of the refrigerant compressor and the costs are reduced.

## Claims

### Claim at position 1

1-9. (canceled)

### Claim 10

A refrigerant compressor for an air-conditioning system, comprising:
a filter arranged in a region in front of a spiral nozzle insert of the refrigerant compressor, as seen in a direction of a mass flow of a refrigerant of the refrigerant compressor, to prevent blockages in the refrigerant compressor, wherein an annular channel surrounding a molding is arranged on a central housing of the refrigerant compressor, that the molding has a circular ring-shaped flat face, and that a friction plate is arranged parallel to the circular ring-shaped flat face, wherein a gap acting as a filter is formed between the circular ring-shaped flat face and the friction plate.

### Claim 11 (depends on 10)

The refrigerant compressor according to claim 10, wherein the annular channel is connected via a side chamber to an inflow for the refrigerant of the refrigerant compressor.

### Claim 12 (depends on 10)

The refrigerant compressor according to claim 10, wherein a bore, in which the spiral nozzle insert is placed, is arranged inside the molding in the central housing of the refrigerant compressor.

### Claim 13 (depends on 10)

The refrigerant compressor according to claim 10, wherein the molding has a trapezoidal or rectangular cross-section.

### Claim 14 (depends on 10)

The refrigerant compressor according to claim 10, wherein a size of the gap is within a range between 0.1 mm and 0.2 mm.

### Claim 15 (depends on 10)

The refrigerant compressor according to claim 10, wherein an inner diameter of the circular ring-shaped flat face of the molding is within a range between 6 mm and 12 mm, and that a width of the circular ring-shaped flat face of the molding is within a range between 1 mm and 3 mm.

### Claim 16

A method for operating a refrigerant compressor, in which particles exceeding a predefined size are filtered out in a region in front of a spiral nozzle insert of the refrigerant compressor, as seen in a direction of a mass flow of a refrigerant of the refrigerant compressor, wherein an annular channel surrounding a molding is provided in a central housing of the refrigerant compressor, that the molding is provided with a circular ring-shaped flat face, and that a friction plate is provided parallel to the circular ring-shaped flat face, as a result of which a filter which retains the particles exceeding the predefined size is formed by a gap between the circular ring-shaped flat face and the friction plate.

### Claim 17 (depends on 16)

The method according to claim 16, wherein the mass flow of the refrigerant takes place via a side chamber with an inflow into the annular channel via the gap into the spiral nozzle insert provided in a bore, wherein the particles exceeding the predefined size are retained by the gap and thus do not reach the region of the spiral nozzle insert.

### Claim 18 (depends on 16)

The method according to claim 16, wherein the gap is provided with a size between 0.1 mm and 0.2 mm.