Sanden Holdings Corporation

Hiroshi Honda

Atsuo Teshima

Misako Kaburagi

Yoshinobu Maemura

Yoshio Kowada

An object is to optimize a back pressure pressing an orbiting scroll against a fixed scroll in a scroll compressor to which an injection cycle is applied. A back pressure control valve () adjusting back pressure (Pm) in a back pressure chamber (H), adjusts the opening degree of a first valve body () increasing and decreasing the flow rate of lubricant which has been separated from gaseous refrigerant compressed in a compression chamber and is supplied to the back pressure chamber (H), in accordance with suction pressure (Ps) in a suction chamber (H), discharge pressure (Pd) in a discharge chamber (H), and injection pressure (Pinj). Then, the back pressure control valve () increases and decreases the lubricant flow rate in accordance with injection pressure (Pinj) as well as suction pressure (Ps) and discharge pressure (Pd), to adjust back pressure to target back pressure varying in accordance with injection pressure (Pinj).

Scroll compressor with back pressure control valve

A scroll-type fluid machine including: a scroll unit () having a fixed scroll () and a movable scroll () in which a bottom plate center () and a wrap spiral center () are made eccentric; and a rotation-inhibiting mechanism () with multiple rotating-inhibiting parts (), each part () being composed of a circular hole () and a pin (), wherein the rotation-inhibiting mechanism (), a straight line A connecting the bottom plate center () and the wrap spiral center () is rotated on the bottom plate center by 90&#xb0; in a direction opposite to a wrapping direction of the wrap (), a point at which the rotated straight line A intersects a pitch circle is set as a center position of one of the rotation-inhibiting parts (), the other rotation-inhibiting parts () are arranged on the pitch circle at even intervals based on one of the rotation-inhibiting part ().

Growing community of inventors

Isesaki, Japan

Hiroshi Honda