| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a multi-cylinder rotary compressor which improves reliability and reduces noise by hardly staying a lubricating oil in a blade back chamber and a back-pressure introducing pathway, and to provide a refrigeration cycle device which improves refrigeration cycle efficiency by including the multi-cylinder rotary compressor. <P>SOLUTION: A compression mechanism unit 3 constituting a multi-cylinder rotary compressor is provided with: a first cylinder 6A and a second cylinder 6B with cylinder chambers Sa and Sb; a first blade 12a and a second blade 12b; a blade back chamber 11b formed at a rear end side of the second blade; a back-pressure introducing pathway H applying a back pressure to the second blade; a communicating pathway 22 communicating the blade back chamber and an internal space of a sealed case 1; and a check valve mechanism G for opening/closing the communication pathway. The check valve mechanism closes the communication pathway when a high pressure is introduced into the blade back chamber and the second blade is moved in a direction in which the volume of the blade back chamber is expanded, and the check valve mechanism opens the communication pathway when the second blade is moved in a direction in which the volume of the blade back chamber is reduced. <P>COPYRIGHT: (C)2013,JPO&INPIT |
