| 摘要 |
PROBLEM TO BE SOLVED: To suppress the performance drop caused by impropriety of the quantity of a refrigerant or supercooling at operation mode without gas injection, in an air conditioner capable of gas injection. SOLUTION: This air conditioner operates the optimum degree of supercooling to the difference between outside air temperature or room temperature and set temperature and the operation states of the numbers of revolutions of indoor and outdoor fans, and controls a first motor-operated expansion valve 4 or a second motor-operated expansion valve 6 so that it may be the optimum degree of supercooling, and lets a surplus refrigerant stay in a gas-liquid separator 5. Hereby, it becomes the optimum quantity of a refrigerant or the optimum degree of supercooling, so this can suppress the performance drop.
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