The invention discloses a pump-free type thermal spray refrigerating cycle method and device. After working fluids are pressurized and conveyed through high-temperature high-pressure
refrigerant steam generated by a generator, working fluids to be conveyed in next circulation are pressurized in advance, energy of the high-temperature high-pressure
refrigerant steam is fully used, and the COP of a
system is improved. The device comprises the generator, a throttling element, an
evaporator, an ejector, a condenser and a
liquid storage device. The
liquid storage device comprises at least two matched
liquid storage tanks in parallel connection, each
liquid storage tank is communicated with the generator, the condenser and other matched liquid storage tanks through a control valve, the ejector is sequentially connected with the condenser, the throttling element and the
evaporator in series to form a loop, and the condenser is sequentially connected with the liquid storage device and the generator in series to form a loop. By means of the device, energy utilization of the
system is more economical and reasonable, the
thermal load of cooling water is reduced, pump-free circulating of the
system is achieved, the number of
moving parts is reduced, and operation performance is more stable and reliable.