High pressure compressor and refrigerating machine having a high pressure compressor

A high pressure compressor, comprising:

• a casing, an inner space of which constitutes a high pressure unit and is provided with a compression unit;
• a first refrigerant passage connected between a suction side and a discharge side based on the compression unit;
• a check valve provided at the first refrigerant passage;
• a second refrigerant passage branched from the first refrigerant passage to shorten a distance between an inlet of the first refrigerant passage connected to the suction side of the compression unit and an outlet of the first refrigerant passage connected to the discharge side of the compression unit based on the compression unit;
• a solenoid valve provided at the second refrigerant passage to selectively open or close the second refrigerant passage;
• and
• a controller configured to control the solenoid valve to close the second refrigerant passage when a compression load occurs on the compression unit but control the solenoid valve to open the second refrigerant passage when a compression load is removed from the compression unit.

A refrigerating cycle device, comprising:

• a compressor,
• a condenser connected to the compressor;
• a condenser fan provided at one side of the condenser,
• an evaporator connected to the condenser;
• and
• an evaporator fan provided at one side of the evaporator,
• wherein the compressor comprises:
• a casing having a sealed inner space, the inner space of which communicates with a discharge pipe;
• a drive motor provided in the inner space of the casing;
• a compression unit provided in the inner space of the casing, and provided with a compression space for compressing refrigerant, and provided with a suction port for guiding refrigerant into the compression space, and provided with a discharge port for guiding refrigerant compressed in the compression space into the inner space of the casing;
• a discharge valve provided in the compression unit to selectively open or close the discharge port according to a difference between a pressure of the inner space of the casing and a pressure of the compression space of the compression unit;
• a first valve configured to suppress refrigerant discharged from the inner space of the casing from flowing backward into the inner space of the casing;
• a bypass pipe connected between a discharge side and a suction side of the compression unit based on the compression unit;
• and
• a second valve provided at the bypass pipe to selectively open or close the bypass pipe.