The invention provides a heat absorption type engine as well as application and application method thereof. The heat absorption type engine comprises cylinders, a
piston is arranged in the air cylinder, the heat absorption type engine further comprises an
inertia device, a heat exchange
pool, a heat regenerator, a radiator and an
evaporator, the cylinders are divided into a first cylinder and a second cylinder, working medium gas is arranged in the first cylinder, a
refrigerant is arranged in the second cylinder, the transmission
assembly comprises a connecting rod and a curved bar, the
inertia device is an
inertia flywheel, and the outer end of the
piston is hinged to the inertia
flywheel sequentially through the connecting rod and the curved bar. Compared with the prior art, the heat absorption type engine, the application and the application method have the advantages that the refrigerants absorbed by
heat energy are separated from working media used for work, combination of the first cylinder and the second cylinder is realized, the whole cycle work is completed in a closed environment, the energy utilization efficiency is theoretically 100% without external air suction and exhaust processes, nearly
zero emission is realized, and the heat absorption type engine can be widely applied to the fields of power generation,
refrigeration, central air conditioners and the like.