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(11) | EP 1 793 182 A3 |
(12) | EUROPEAN PATENT APPLICATION |
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(54) | Control method of refrigeration cycle apparatus |
(57) It is an object of the present invention to stably operate the refrigeration cycle
apparatus having an expansion mechanism capable of recovering pressure energy at the
time of expansion, and to enhance the stability at the time of actuation. A control
method of the refrigeration cycle apparatus including a compressing mechanism 2, a
heat source-side heat exchanger 6, the expansion mechanism 5 which recovers power,
and a utilizing-side heat exchanger 3. The number of revolutions of the expansion
mechanism 5 is controlled such that the number of revolutions becomes equal to a target
number of revolutions of the expansion mechanism 5 determined from a discharging temperature
of the compressing mechanism 2. The number of revolutions of the expansion mechanism
5 can appropriately be controlled, the refrigeration cycle apparatus can be operated
stably, and the stability of the refrigeration cycle apparatus at the time of actuation
can be enhanced.
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