Patent ID: 11874022
Assignee: HAMFOP TECHNOLOGIES LLC
Field: Thermal processes and apparatus (Mechanical engineering)
Classification: CPC H  F  Y | IPC F

Claim 0:
1. A heat-activated multiphase fluid-operated pump for cooling a building, comprising:
an evaporator containing a working fluid and receptive of heat from the building to convert a liquid phase of the working fluid into a vapor phase of the working fluid;
a pressure-control safety valve coupled to an exit port of the evaporator and maintaining the working fluid in the evaporator at a set target pressure and allowing the vapor phase of the working fluid to escape through the exit port whenever the set target pressure is exceeded;
a liquid-piston chamber coupled to the pressure-control valve to receive the vapor phase of the working fluid from the evaporator at the set target pressure, the vapor phase of the working fluid expanding adiabatically and displacing a liquid within the liquid-piston chamber, expelling the displaced liquid therefrom in a pumping stage of a thermodynamic cycle;
a unidirectional injector return check valve coupled to both a first exit port of the liquid-piston chamber and to an input port of the evaporator, wherein periodic pressure pulses of a liquid phase of the working fluid from the liquid-piston chamber that temporarily exceed the pressure in the evaporator facilitate jets of the liquid phase of the working fluid to return to the evaporator in successive brief spurts;
a unidirectional pump-exit check valve coupled to a second exit port of the liquid-piston chamber to allow the displaced liquid to exit the liquid-piston chamber;
a unidirectional liquid suction-entry check valve coupled to a return port of the liquid-piston chamber; and
a heat exchanger coupled to the unidirectional pump-exit check valve to receive the displaced liquid from the liquid piston-chamber, the heat exchanger located underground at a substantially constant earth temperature to serve as a heatsink, the heat exchanger also coupled to the unidirectional suction-entry check valve to allow the displaced liquid, in a suction stage of the thermodynamic cycle, to return to the liquid-piston chamber via cooling lines in one or more rooms of a building.