Patent ID: 7476089
Filing Date: 2009-01-13
Classification: F04C

Abstract:
1. A scroll compressor comprising: a casing including a high pressure chamber and a low pressure chamber; a driving motor installed in the casing, the driving motor configured to generate a driving force; a rotating shaft; a compression unit including a muffler, a fixed scroll, and a compression unit compressing chamber, the compression unit connected to the driving motor by the rotating shaft, the compression unit configured to compress and externally discharge a gas when the driving motor is driven; and an overheat preventing unit configured to sense a temperature of a gas at an intermediate pressure location of the compression unit compressing chamber, and to bypass gas from the high pressure chamber to the low pressure chamber if a sensed temperature of the gas at the intermediate pressure location exceeds a pre-set value, the overheat preventing unit comprising: a passage member attached to an upper surface of the fixed scroll and containing a bypass configured to connect the high pressure chamber to the low pressure chamber, a thermal distortion member configured to be thermally distorted when the temperature of the gas compressed at the intermediate pressure location increases beyond the pre-set value, a channel connecting the intermediate pressure location to the thermal distortion member, and a valve member attached to the thermal distortion member and configured to open the bypass passage when the thermal distortion member is thermally distorted in a first concave position, the valve member blocking the bypass passage when the thermal distortion member is not thermally distorted and in a second concave position opposite to the first concave position.