Compressor-free refrigeration system powered by heat source

Abstract

A refrigeration system having: a heat source that provides heat energy; a power generator that contains the heat source to heat a refrigerating medium, to increase the temperature and pressure and vaporize the refrigerating medium; a condenser into which flows the liquid refrigerating medium from the power generator under the pressure difference resulted from heating in the power generator, and in which the liquid refrigerating medium temperature is decreased; a throttle valve that jets the liquid refrigerating medium into an evaporator to decrease its pressure and absorb heat; an evaporator to exchange heat from the refrigerating medium with a refrigeration output; and a liquid working medium return unit through which the liquid working medium accumulated on the bottom of the evaporator flows by gravity back freely to the power generator, wherein the evaporator, liquid working medium return unit, and power generator are arranged from top to bottom vertically.

What is claimed: 
     
         1 . A refrigeration system, comprising:
 a heat source designed to provide heat energy;   a power generator designed to heat up a refrigerating medium with the heat source arranged in the power generator, so that the temperature and pressure of the refrigerating medium are increased and the refrigerating medium is vaporized;   a condenser into which the liquid refrigerating medium flows from the power generator under the action of the pressure difference resulted from the high temperature in the power generator, and in which the temperature of the liquid refrigerating medium is decreased;   a throttle valve which controls the liquid refrigerating medium flowing through the condenser to jet out from the throttle valve under the action of the pressure difference, so that the pressure of the liquid refrigerating medium is decreased under the jet action and the liquid refrigerating medium absorbs heat;   an evaporator into which the low-temperature and low-pressure refrigerating medium is jetted from the throttle valve, and in which the low-temperature and low-pressure refrigerating medium exchanges heat with a refrigeration output in the evaporator and is accumulated in the form of liquid refrigerating medium on the bottom of the evaporator; and   a liquid working medium return unit through which the liquid working medium accumulated on the bottom of the evaporator flows back freely to the power generator under gravity action,   wherein the evaporator, liquid working medium return unit, and power generator are arranged from top to bottom in a vertical direction in turn.   
     
     
         2 . The refrigeration system as set forth in  claim 1 , wherein the liquid working medium return unit comprises an upper valve, a reservoir, and a lower valve, the upper end of the reservoir is connected to the evaporator via the upper valve, the lower end of the reservoir is connected to the power generator via the lower valve, and the upper valve and lower valve open sequentially, but don't open at the same time. 
     
     
         3 . The refrigeration system as set forth in  claim 1 , wherein the liquid working medium flows out of the power generator through a pipe outlet arranged blow the gas-liquid interface in the power generator. 
     
     
         4 . The refrigeration system as set forth in  claim 1 , wherein the condenser is a water-cooled condenser or an air-cooled condenser, or comprises a water-cooled condenser and an air-cooled condenser connected in series. 
     
     
         5 . The refrigeration system as set forth in  claim 1 , wherein the refrigerating medium is any gas-liquid phase change refrigerant. 
     
     
         6 . The refrigeration system as set forth in  claim 5 , wherein the refrigerating medium is ammonia, F12, F22, F502, liquid nitrogen, or 134A. 
     
     
         7 . The refrigeration system as set forth in  claim 1 , wherein the liquid working medium return unit opens at a specific time interval.