To provide a fluid compressor for preventing generation of water in a motor chamber to deteriorate a fluid compression function, by suppressing entering of fluid containing hydrogen from a pump chamber side into the motor chamber.
A gear housing 14 and a bearing block 15 forming a connection housing 13 are interposed between a motor housing 11 and a pump housing 12, and they are integrally assembled to constitute a hydrogen compressor 10. A gear chamber 20 is surrounded by and formed between the gear housing 14 and bearing block 15, and a fluid discharge port 21 is formed at an uppermost position of the gear housing 14 to make the inside of the gear camber 20 communicate with outside through a communication passage 50. Therefore, even if the hydrogen offgas H enters from the pump chamber 18 side into the gear chamber 20, the hydrogen offgas H is discharged from the fluid discharge port 21 to the outside through the communication passage 50, so as to prevent the hydrogen offgas H from entering into the motor chamber 16.
FUJII TOSHIRO
ISHIDA ATSUHIRO
Makoto Onda