Patent ID: 7263828
Filing Date: 2007-09-04
Classification: F01C,F01K,F04C,F25B

Abstract:
1. A fluid machine comprising: a housing: a shaft supported on the housing, wherein the shaft is capable of being rotated by a driving force from a driving source; an expansion-and-compressor device housed in the housing, the expansion-and-compressor device being capable of operating as a compressor device in a pump mode operation in which the expansion-and-compressor device is rotated by the driving force from the driving source via the shaft to compress working fluid, and of operating as an expansion device in a motor mode operation in which fluid pressure of the working fluid is converted into kinetic energy; and a transmission device housed in the housing and located between the shaft and the expansion-and-compressor device, for transmitting rotation from the shaft to the expansion-and-compressor device, the transmission device being capable of increasing the rotational speed of the expansion-and-compressor device to be transmitted from the shaft to the expansion-and-compressor device, when the expansion-and-compressor device is operated in the pump mode operation.