US 4,544,338 AGranted

Oil feeder means for use in a horizontal type rotary compressor

AssigneeHitachi, Ltd.

InventorsMasahiro Takebayashi, Akio Sakazume, Hiroshi Iwata, Masahiko Sugiyama, Mitsuru Murata, Shigetaro Tagawa

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Abstract

A horizontal type rotary compressor including a compression element having a cylinder, a shaft having a crank thereon, a pair of side plates concurrently serving both as bearings of the shaft and as side walls of the cylinder, a roller fitted onto the crank, and a vane so arranged as to slide in a groove of the cylinder and have a tip end thereof contacted with the roller rotating in accordance with the rotation of the crank and an appropriate end thereof urged by a spring to make a reciprocating movement along the groove are provided within a case. A pumping chamber is defined by a rear face of the vane, the groove of the cylinder and the side plates. One of the side plates is formed with a suction port capable of sucking thereinto the oil within the case while the other of the side plate is formed with a discharge port for transmitting the oil in the pumping chamber to an oil feeding passage. An oil feeder means for use in the horizontal type rotary compressor is a space provided at the exit of the suction port of the side plate having the suction port and the suction port opens downwardly so that the feeding of a sufficient or stable amount of oil is ensured even when the surface level of the oil is lowered.

Claims5

Dependent claims

In a horizontal type rotary compressor constructed such that a compression element is provided within a case which includes a cylinder, a shaft having a crank thereon, a pair of side plates concurrently serving both as bearings of said shaft and as side walls of said cylinder, a roller fitted onto said crank, and a vane so arranged so as to slide in a groove of said cylinder and to have a tip end thereof contacted with said roller rotating in accordance with the rotation of said crank and an opposite end thereof pushed by a spring to make a reciprocating movement along said groove;

a pumping chamber is defined by a rearface of said vane, said groove of said cylinder and said side plates;
one of said side plates is formed therein with a suction port capable of sucking thereinto the oil within said case while the other of said side plates is formed therein with a discharge port for transmitting the oil in said pumping chamber to an oil feeding passage, an oil feeder means for use in said horizontal rotary pump compressor characterized in that a flow path from the suction inlet to the pumping chamber comprises a suction port tapered from the inlet thereof to the outlet thereof, said inlet being downwardly opened into an oil sump, a space provided at the side plate in which said suction port is opened, and a horizontal passage communicating said space to said pumping chamber, whereby said flow path has a resistance against the backflow of oil.

Dependencies are inferred from the claim text.