Patent ID: 7229257

Claim:
A horizontal type compressor comprising: a casing in which a suction pipe and a discharge pipe are connected to each other; a driving unit mounted at one side of the casing for generating a driving force; a compression unit mounted at the other side of the casing for compressing refrigerant by the driving force generated from the driving unit; a differential pressure plate for dividing the casing into a high pressure chamber and a lower pressure chamber and thus maintaining an oil level of the high pressure chamber to be higher than that of the lower pressure chamber; and a lubricating unit for supplying oil stored in the high pressure chamber to each sliding part in the compressor and making the oil which finished a lubricating operation return to the high pressure chamber from the lower pressure chamber, wherein the differential pressure plate includes: a muffler portion mounted at an upper surface of a main bearing and formed to have a predetermined space for reducing noise of refrigerant, and a differential pressure chamber is integrally extended from an outer side of the muffler portion and attached to an upper surface of the main bearing and has a predetermined clearance with an outer edge of the main bearing; and wherein a curved step portion is formed at an edge of the differential pressure chamber, and a predetermined clearance through which refrigerant passes is formed between the step portion and the main bearing.