JPS6432489U - - Google Patents

Description

[Brief explanation of the drawing]

Fig. 1 is a vertical sectional view of a hermetic rotary compressor showing an embodiment of the present invention, Fig. 2 is a sectional view of the main part of the rotary compression element at startup, and Fig. 3 is a main part of the rotary compression element during normal operation. FIG. 2... sealed case, 3... rotating compression element, 5... bore, 6... cylinder block, 7... compression chamber, 11... roller, 12... vane chamber, 13... vane, 15... suction passage, 17... bellows.

Claims (1)

[Scope of utility model registration request] A cylinder block having a bore, a frame that closes the bore of this block to define a compression chamber inside, a roller that rotates eccentrically within the compression chamber, and a roller whose tip abuts against the roller to create high pressure inside the compression chamber. A rotary compression element consisting of a vane divided into a side and a low pressure side is housed in a sealed case, and low pressure gas is introduced into the case from outside the sealed case,
A bellows is provided on the back of the vane, in which the high-pressure gas compressed in the compression chamber is discharged to the outside of the case through a space inside the sealed case, while the high-pressure gas is directly sucked into the compression chamber through the suction passage, A hermetic rotary compressor characterized in that the bellows is expanded and contracted by a pressure difference between the periphery of the bellows and the suction passage, and the bellows is configured to press the vane toward the roller only when the bellows is expanded.