| 摘要 |
PROBLEM TO BE SOLVED: To provide a high efficient air conditioner capable of accommodating for a variation in a requisite air conditioning capability without changing a number of rotation of a prime mover, capable of restricting a reduction in thermal efficiency of the prime mover caused by changing-over the number of operating compressors and further capable of expanding a minimum region of operating capacity. SOLUTION: This air conditioner comprises a prime mover (1) acting as a driving machine for the air conditioner; a plurality of compressors (2), (3) driven by the prime mover (1); a transferring mechanism (4) for transmitting a rotating output of the prime mover (1) to the plurality of compressors (2), (3); and a transmission means (5) installed at any one of an output shaft (11) of the prime mover (1), input shafts (6), (7) of the compressor and the transferring mechanism (4). Any one (2) of the plurality of compressors (2), (3) is constituted such that it is always driven during an air conditioning operation. The other compressor (3) is constituted such that it is operated only in the case that a capability more than a predetermined air conditioning capability is required during an air conditioning operation. The transmission means (5) controls a rate of increasing speed to cause a torque of the prime mover (1) to become constant when the number of operating compressors is changed.
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