A vapor compression refrigerator provided with a hydraulic medium comprising a coolant comprising HFC 32 as the indispensable component and at least one refrigerator oil selected from ether-base and ester-base refrigerator oils, wherein a synthetic zeolite having an average pore diameter of more than 2.6 ANGSTROM to 3.0 ANGSTROM at 25 DEG C is used as a desiccant for the hydraulic medium.
