| 摘要 |
<p>Disclosed is a multi-cylinder rotary compressor (R) in which cylinders (6A, 6B) are provided with an intervening partition plate (2) interposed therebetween, blade rear chambers (10a, 10b) communicate through a blade groove with cylinder chambers (Sa, Sb) which introduce low-pressure gas, and a spring member (14) is provided in a first blade rear chamber in such a way that compressive action is regularly performed in a cylinder chamber by applying rear pressure to a blade (11a). A second blade rear chamber has a hermetically sealed construction and a compressive action is performed in a cylinder chamber by introducing high-pressure gas thereto. A pressure changeover mechanism (K) which introduces low-pressure gas and performs closed-cylinder operation is provided above an oil reservoir section (15). The expression L < C / 4Fmax (1) is established in respect of a conduit of length L [m] from the pressure changeover mechanism to the blade rear chamber, in which the maximum rotation speed of the compressor is Fmax [Hz] and the speed of sound in the high-pressure gas discharged therefrom is C [m/s]. A multi-cylinder rotary compressor is provided in which generation of abnormal increases in vibratory force on the conduits produced by resonance and abnormal increases in pressure fluctuation in the blade rear chamber are prevented, and in which improved reliability and high compression performance are obtained. Further provided is a refrigeration cycle device which is provided with said compressor and which achieves improved refrigeration cycle efficiency.</p> |
