Refrigerant cycle device

A refrigerant cycle device for an air conditioner that performs a dehumidifying operation of cooling and dehumidifying feed air to be blown into a space to be air-conditioned and of heating the dehumidified air, the refrigerant cycle device comprising:

• a compressor which compresses and discharges refrigerant;
• a refrigerant radiator disposed to make a high-pressure refrigerant discharged from the compressor exchange heat with the feed air to thereby radiate heat of the high-pressure refrigerant;
• an outdoor heat exchanger disposed to make the refrigerant flowing out of the refrigerant radiator exchange heat with outdoor air;
• an evaporator disposed to make a low-pressure refrigerant passing therein exchange heat with the feed air before passing through the refrigerant radiator to thereby evaporate the low-pressure refrigerant;
• a first throttle part configured to reduce pressure of the refrigerant flowing into the outdoor heat exchanger and being capable of varying a throttle opening;
• a second throttle part configured to reduce pressure of the refrigerant flowing into the evaporator and being capable of varying a throttle opening;
• a constant-pressure adjusting part configured to keep a pressure of the refrigerant flowing out of the evaporator at a specified value which is determined in advance;
• and
• a refrigerant passage switching part configured to switch at least between a first refrigerant passage and a second refrigerant passage in a refrigerant cycle, wherein
• the first refrigerant passage makes the refrigerant flowing out of the refrigerant radiator flow in order of:
• the first throttle part→a the outdoor heat exchanger→the second throttle part→the evaporator→the constant-pressure adjusting part→a suction side of the compressor, and
• the second refrigerant passage makes the refrigerant flowing out of the refrigerant radiator flow in order of:
• the first throttle part→the outdoor heat exchanger→the suction side of the compressor and at the same time makes the refrigerant flowing out of the refrigerant radiator flow in order of the second throttle part→the evaporator→the constant-pressure adjusting part→the suction side of the compressor.