US 6,960,070 B2Granted

Compressor

AssigneeBITZER Kuehlmaschinenbau GmbH

InventorsKarl-Friedrich Kammhoff, Gernot Balz, Christian Scharer

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Abstract

In order to improve a compressor for refrigerant, comprising an outer housing, a scroll compressor arranged in the outer housing and having a first compressor member arranged stationarily in the outer housing and a second compressor member which is movable relative to the first compressor member, the compressor members each having a base and first and second scroll ribs, respectively, which rise above the respective base and engage in one another such that the second compressor member is movable relative to the first compressor member on an orbital path about a central axis for the purpose of compressing the refrigerant, a drive unit for the second compressor member having an eccentric drive, a drive shaft, a drive motor arranged in a motor housing and having drawn-in refrigerant flowing around it as well as a bearing unit for the drive shaft which comprises a first bearing member connected to the outer housing, in such a manner that the refrigerant drawn in by the scroll compressor is free from lubricating oil to as great an extent as possible it is suggested that the refrigerant flow through an oil separator, which is arranged in the outer housing between this and the drive unit, after flowing around the drive motor and prior to entering the scroll compressor.

Claims35

Dependent claims

Compressor for refrigerant, comprising:

an outer housing,
a scroll compressor arranged in the outer housing and having a first compressor member arranged stationarily in the outer housing and a second compressor member movable relative to the first compressor member, said compressor members each having a base and first and second scroll ribs, respectively, rising above the respective base, said ribs engaging in one another such that the second compressor member is movable relative to the first compressor member on an orbital path about a central axis for the purpose of compressing the refrigerant,
a drive unit for the second compressor member with an eccentric drive,
a drive shaft,
a drive motor arranged in a motor housing and having drawn-in refrigerant flowing through said drive motor, the refrigerant after flowing through said drive motor exiting from said motor housing, through an exit opening of said motor housing facing said outer housing and defining a space between said outer housing and said motor housing, into a section of said space and flowing through an oil separator prior to entering the scroll compressor,
said oil separator being arranged inside the outer housing in said space between the outer housing and said motor housing, said refrigerant when entering said oil separator experiencing a deflection in an azimuthal direction in relation to the central axis caused by a deflection unit having at least one deflection surface arranged opposite the exit opening in said space and said refrigerant being guided in said azimuthal direction by an inner wall face of said outer housing and an outer wall face of said motor housing in order to deposit oil thereon.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 10/682,304Filed 8 Oct 2003
Priority: DE 102 48 92615 Oct 2002
Published: US 2004/0126261 A11 Jul 2004
Granted: 1 Nov 2005
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

F04C 29/126
With inlet and outlet valves specially adapted for rotary or oscillating piston pumps: of the non-return type
F04C 18/0215
Both members having co-operating elements in spiral form: where only one member is moving
F04C 23/008
Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping…:…
F04C 29/025
Lubrication ; Lubricant separation: using a lubricant pump