Pumps – Three or more cylinders arranged in parallel – radial – or...
Patent
1990-10-25
1991-11-05
Bertsch, Richard A.
Pumps
Three or more cylinders arranged in parallel, radial, or...
184616, F04B 3904, F04B 2708, F01M 100
Patent
active
050627732
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a swash plate type refrigerant compressor, and more particularly to a swash plate type refrigerant compressor provided with a cylinder block having a suction passageway formed therein which permits a refrigerant gas containing a mist-like lubricant oil to enter the passageway per se, and permits the mist-like lubricant oil to be separated from the refrigerant gas, whereby the separated oil flows into a swash plate chamber and the oil removed refrigerant gas is sucked and compressed in cylinder bores of the cylinder block.
BACKGROUND ART
Generally, an automobile air-conditioner accommodating a refrigerant compressor uses a refrigerant gas containing therein a mist-like lubricant oil, i.e., oil fine particles. The lubricant oil is needed for lubricating the compressor. Nevertheless, when the lubricant oil is adhered to an evaporator arranged in the refrigerating circuit of the air-conditioner, the evaporator is unable to conduct an effective thermal exchange, and accordingly, the refrigerating efficiency of the air-conditioner is lowered. Further, when an increase in the amount of the lubricant oil contained in the refrigerant gas flowing in the refrigerating circuit occurs, the amount of the lubricant oil remaining inside the compressor is accordingly reduced, and therefore, the internal movable elements of the compressor suffer from a lack of lubrication. Accordingly, the adoption of a method of separating the mist-like lubricant oil from the refrigerant gas is required when the oil-containing refrigerant gas enters the compressor to be compressed therein.
One typical conventional swash plate type refrigerant compressor is provided with an internal construction such that a small hole is formed in a cylinder block of the compressor, to allow a communication between a suction passageway and a swash plate chamber and thereby permit a flow of the refrigerant gas from the swash plate chamber when a pressure of the refrigerant gas in the swash plate chamber becomes excessively high due to a bleeding of a blow-by refrigerant gas from cylinder bores into the swash plate chamber. In this compressor, a small amount of lubricant oil separated from the refrigerant gas, due to an impingement of the oil-containing refrigerant gas upon the internal wall of the suction passageway when entering the compressor from an external refrigerating circuit, is allowed to enter the swash plate chamber through the above-mentioned small hole. Nevertheless, such a small hole is unable to positively separate the lubricant oil from the lubricant oil-containing refrigerant gas, to thereby draw the lubricant oil into the swash plate chamber. This is because the small hole has different action from that of a baffle plate, and cannot function to deaden the flow inertia of the lubricant oil-containing refrigerant gas when it enters the compressor from the outside. Namely, the small hole of the typical conventional swash plate type compressor cannot function to separate the oil component from the refrigerant gas.
DISCLOSURE OF THE INVENTION
Accordingly, an object of the present invention is to obviate the above-mentioned defects encountered by the conventional swash plate type refrigerant compressor.
Another object of the present invention is to provide a swash plate type refrigerant compressor having a separating means for separating the oil component from the mist-like lubricant oil-containing refrigerant gas, whereby a positive separation of the oil component in a suction passageway of the compressor and supply of the separated lubricant oil to a swash plate chamber of the compressor are carried out.
In accordance with the present invention, there is provided a swash plate type refrigerant compressor with a unit for separating lubricant oil from a refrigerant gas, which comprises:
a cylinder block provided with a suction passageway formed therein to permit passing of a mist-like oil-containing refrigerant gas therethrough when such a refrigerant gas enters the cylinder block from an ex
REFERENCES:
patent: 2689080 (1954-09-01), Preiss
patent: 4070136 (1978-01-01), Nakayama
patent: 4938664 (1990-07-01), Zinsmeyer
Ikeda Hayato
Kawai Katsunori
Kawai Toshihiro
Yokomachi Naoya
Bertsch Richard A.
Kabushiki Kaisha Toyoda Jidoshokku Seisakusho
Korytnyk Peter
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