Refrigerant cycle device

A refrigerant cycle device for a vehicle, adapted to adjust a temperature of air blown into an air-conditioning target space by utilizing heat of refrigerant circulating through a refrigerant cycle of the refrigerant cycle device, the refrigerant cycle device comprising:

• a compressor configured to compress the refrigerant and to discharge the compressed refrigerant;
• a discharge capacity control portion configured to control a discharge capacity of the compressor;
• a noise determination portion configured to determine whether a noise audible to a passenger, other than a refrigerant passing noise generated from the refrigerant when the refrigerant circulates through the refrigerant cycle, is in a low noise state in which a level of the audible noise other than the refrigerant passing noise is equal to or lower than a predetermined noise level;
• a decompressor decompressing the compressed refrigerant discharged by the compressor;
• and
• a pressure sensor being disposed between the compressor and the decompressor and detecting a pressure of the compressed refrigerant, wherein
• the discharge capacity control portion performs a normal control in which the discharge capacity of the compressor is increased in accordance with an increase of an air-conditioning thermal load of the air-conditioning target space,
• the discharge capacity control portion performs a gradual activation control in which the discharge capacity of the compressor is set to be lower than the discharge capacity determined in the normal control, when the noise determination portion determines that the audible noise other than the refrigerant passing noise is in the low noise state at an activation time of the compressor, and
• the discharge capacity control portion sets an initial value of the discharge capacity in the gradual activation control at the activation time of the compressor to be lower than an initial value of the discharge capacity in the normal control at the activation time of the compressor, based on the pressure detected by the pressure sensor at the activation time of the compressor.