A clothes dryer comprising: a heat pump device including a pipeline connecting a compressor, a radiator for radiating heat of a refrigerant compressed, a throttle part for reducing pressure of the refrigerant of high-pressure, and a heat absorber for causing the reduced refrigerant of low-pressure to deprive heat of surroundings, the refrigerant circulating the pipeline; a temperature detecting unit for detecting temperature of the refrigerant; a rotary drum forming a drying chamber to accommodate and dry clothes; a blower fan for supplying warm air heated by the heat pump device into the rotary drum; a heat exchange air passage for passing the air for drying through the heat absorber to the radiator, and then for guiding the air into the drying chamber, the air being blown from the blower fan; a controller for controlling at least the compressor, wherein, when the temperature detected by the temperature detecting unit is lower than a predetermined temperature that is stored in advance, the controller energizes windings of a motor inside the compressor, without causing the motor to rotate, wherein the predetermined temperature is set to be a low temperature at which the refrigerant becomes a liquid; and a time measuring unit, wherein the controller terminates the energization when time measured by the time measuring unit becomes longer than a predetermined time period, characterized in that the clothes dryer further comprises: a conversion unit for converting an alternating-current power source inputted to the dryer into a direct-current power source; and a direct-current voltage detecting unit for detecting voltage of the direct-current power source converted by the conversion unit, wherein the controller modifies the predetermined time period until time when the energization is terminated, in accordance with a difference between the voltage detected by the direct-current voltage detecting unit and a second predetermined voltage. a heat pump device including a pipeline connecting a compressor, a radiator for radiating heat of a refrigerant compressed, a throttle part for reducing pressure of the refrigerant of high-pressure, and a heat absorber for causing the reduced refrigerant of low-pressure to deprive heat of surroundings, the refrigerant circulating the pipeline; a compressor, a radiator for radiating heat of a refrigerant compressed, a throttle part for reducing pressure of the refrigerant of high-pressure, and a heat absorber for causing the reduced refrigerant of low-pressure to deprive heat of surroundings, the refrigerant circulating the pipeline; a temperature detecting unit for detecting temperature of the refrigerant; a rotary drum forming a drying chamber to accommodate and dry clothes; a blower fan for supplying warm air heated by the heat pump device into the rotary drum; a heat exchange air passage for passing the air for drying through the heat absorber to the radiator, and then for guiding the air into the drying chamber, the air being blown from the blower fan; a controller for controlling at least the compressor, wherein, when the temperature detected by the temperature detecting unit is lower than a predetermined temperature that is stored in advance, the controller energizes windings of a motor inside the compressor, without causing the motor to rotate, wherein the predetermined temperature is set to be a low temperature at which the refrigerant becomes a liquid; and a time measuring unit, wherein the controller terminates the energization when time measured by the time measuring unit becomes longer than a predetermined time period, characterized in that the clothes dryer further comprises: a conversion unit for converting an alternating-current power source inputted to the dryer into a direct-current power source; and a direct-current voltage detecting unit for detecting voltage of the direct-current power source converted by the conversion unit, wherein the controller modifies the predetermined time period until time when the energization is terminated, in accordance with a difference between the voltage detected by the direct-current voltage detecting unit and a second predetermined voltage. a conversion unit for converting an alternating-current power source inputted to the dryer into a direct-current power source; and a direct-current voltage detecting unit for detecting voltage of the direct-current power source converted by the conversion unit, wherein the controller modifies the predetermined time period until time when the energization is terminated, in accordance with a difference between the voltage detected by the direct-current voltage detecting unit and a second predetermined voltage. wherein the controller modifies the predetermined time period until time when the energization is terminated, in accordance with a difference between the voltage detected by the direct-current voltage detecting unit and a second predetermined voltage.