A refrigeration apparatus, comprising main components such as a three-port valve (4) or multi-port valve, a generator, a cylinder group (5,6), an airproof container (11) and the like in addition to the conventional components such as compressor (3), the three-port valve (4) or the multi-port valve, the cylinder group (5,6), the condenser (10), the expansion valve (1), and the evaporator (2), and finally enters the compressor (3) from the evaporator (2); the cylinder group (5,6) can utilize the atmospheric pressure inside the airproof container (11) to do work and generate electricity, so as to compensate for the power consumption of the compressor (3), thus saving electrical energy.