JP2003286979A5 - - Google Patents

Claims (4)

A cylindrical cylinder, a piston disposed eccentrically in the cylinder portion, a piston having a spiral groove with a gradually changing pitch provided on the outer wall surface of the cylinder, and a blade mounted with a minute gap in the spiral groove; In a helical blade compressor in which a shaft for transmitting the power of the electric motor to the piston and an Oldham mechanism for rotating the piston with respect to the cylinder are mechanically connected, a circle provided inside the cylinder of the piston 12 A slide bush 15 provided on a shaft 8 between a main frame and a sub-frame is provided with a slide bush 15 provided with a flat sliding surface on one side provided with a rectangular fitting hole on the inside of the columnar shape. The seal gap δ in the longitudinal direction of the working chamber is formed between the cylinder cylinder portion and the piston outer wall surface so as to be in close contact with the slide receiving surface formed by a flat surface. As but a minimum, Herikarubure characterized by being configured the eccentricity variable mechanism of the piston - de compressor. A shaft in which the flat surface of the slide portion 8b is inclined with respect to a plane including a shaft axis coinciding with a cylindrical cylinder cylinder portion axis and a cylindrical piston shaft eccentrically mounted inside the cylinder portion. 2. The helical blade compressor according to claim 1, wherein a piston eccentric amount variable mechanism is configured by mounting so that the slide surface of the slide bush comes into close contact. Between the shaft and the slide bush, an elastic member 17 composed of a spring, rubber or the like is moved so that the slide bush is pushed and moved in a direction where the slide receiving surface 8d of the shaft slide portion and the slide surface 15e of the slide bush meet. The helical blade type compressor according to claim 1 or 2, wherein the helical blade type compressor is mounted on. A slide having a cylindrical balancer corresponding to a rotational inertial mass equal to or less than a rotational inertial mass including a piston 12 with a blade constituting a compression mechanism and an eccentric portion of a shaft on which the piston is mounted. The helical blade compressor according to any one of claims 1 to 3, wherein the helical blade compressor is configured to be fixed at one or two end faces of the bush.