Gravity-driven gas-liquid circulation device

Abstract

The present invention provides a gravity-driven gas-liquid circulation device, comprising a condensation unit and an evaporation unit. The condensation unit has an end connected to a gaseous phase input tube and another end connected to a liquid phase output tube. The evaporation unit comprises a thermally conductive base for contact with an external high-temperature device, a plurality of fins integrally formed on the thermally conductive base, and an integrally formed sealing housing provided on the thermally conductive base and enclosing the fins, wherein the integrally formed sealing housing is provided with a gas outlet hole and a liquid inlet hole, the gas outlet hole is lower than the gaseous phase input tube and is connected to an end of the gaseous phase input tube in order to guide a high-temperature gaseous-state working fluid through the gaseous phase input tube to the condensation unit, and the liquid inlet hole is level with or lower than the liquid phase output tube and is connected to an end of the liquid phase output tube in order to receive a liquid-state working fluid, allowing a force of gravity acting on the liquid-state working fluid to provide a siphoning force and thereby cause circulation of the liquid-state working fluid and the gaseous-state working fluid.

What is claimed is: 
     
         1 . A gravity-driven gas-liquid circulation device, comprising:
 a condensation unit having an end connected to a gaseous phase input tube and another end connected to a liquid phase output tube; and   an evaporation unit comprising a thermally conductive base for contact with an external high-temperature device, a plurality of fins integrally formed on the thermally conductive base, and an integrally formed sealing housing provided on the thermally conductive base and enclosing the fins, wherein the integrally formed sealing housing is provided with a gas outlet hole and a liquid inlet hole, the gas outlet hole is lower than the gaseous phase input tube and is connected to an end of the gaseous phase input tube in order to guide a high-temperature gaseous-state working fluid through the gaseous phase input tube to the condensation unit, and the liquid inlet hole is level with or lower than the liquid phase output tube and is connected to an end of the liquid phase output tube in order to receive a liquid-state working fluid, allowing a force of gravity acting on the liquid-state working fluid to provide a siphoning force and thereby cause circulation of the liquid-state working fluid and the gaseous-state working fluid.   
     
     
         2 . The gravity-driven gas-liquid circulation device of  claim 1 , wherein the thermally conductive base is provided thereon with a reinforcement member, wherein, the reinforcement member is clamped vertically between the integrally formed sealing housing and the thermally conductive base and serves to increase the compressive strength. 
     
     
         3 . The gravity-driven gas-liquid circulation device of  claim 2 , wherein the reinforcement member is provided with at least one through hole and/or at least one aperture to enable passage of the liquid-state working fluid. 
     
     
         4 . The gravity-driven gas-liquid circulation device of  claim 1 , wherein the integrally formed sealing housing includes a first housing portion and a second housing portion; the first housing portion is provided on the thermally conductive base and encloses the fins; and, the second housing portion is integrally formed with, and lies on top of, the first housing portion. 
     
     
         5 . The gravity-driven gas-liquid circulation device of  claim 1 , wherein the top sides of the fins are higher than the bottom edge, and lower than the top edge, of the liquid inlet hole or are higher than the top edge of the liquid inlet hole. 
     
     
         6 . The gravity-driven gas-liquid circulation device of  claim 1 , wherein the gas outlet hole has a larger hole diameter than the liquid inlet hole. 
     
     
         7 . The gravity-driven gas-liquid circulation device of  claim 1 , wherein the spacing between each two adjacent fins forms a flow channel, and the spacing ranges from 0.2 mm to 1 mm. 
     
     
         8 . The gravity-driven gas-liquid circulation device of  claim 7 , wherein the liquid inlet hole is in alignment with the flow channels. 
     
     
         9 . The gravity-driven gas-liquid circulation device of  claim 1 , wherein the fins are integrally formed on the thermally conductive base by a relieving means. 
     
     
         10 . The gravity-driven gas-liquid circulation device of  claim 1 , wherein each fin has a thickness ranging from 0.2 mm to 1 mm. 
     
     
         11 . The gravity-driven gas-liquid circulation device of  claim 1 , wherein the condensation unit comprises a front condensation assembly, a rear condensation assembly, and a plurality of heat dissipation fins; the front condensation assembly comprises a front left flow tube, a front right flow tube, and a plurality of front heat dissipation tubes; the front left flow tube and the front right flow tube are provided on two opposite lateral sides of the front condensation assembly respectively and are connected to the gaseous phase input tube and the liquid phase output tube respectively; the front heat dissipation tubes are in communication with the front left flow tube and the front right flow tube and are vertically spaced apart; the rear condensation assembly comprises a rear left flow tube, a rear right flow tube, and a plurality of rear heat dissipation tubes; the rear left flow tube and the rear right flow tube are provided on two opposite lateral sides of the rear condensation assembly respectively; the rear heat dissipation tubes are in communication with the rear left flow tube and the rear right flow tube and are vertically spaced apart; gaps between the rear heat dissipation tubes and gaps between the front heat dissipation tubes correspond to each other and jointly form a plurality of through grooves; the heat dissipation fins are in contact with surfaces of the front heat dissipation tubes and surfaces of the rear heat dissipation tubes to enable heat exchange between the heat dissipation fins and the heat dissipation tubes; the front left flow tube and the rear left flow tube are separately formed; and, the front right flow tube and the rear right flow tube are separately formed. 
     
     
         12 . The gravity-driven gas-liquid circulation device of  claim 1 , wherein the condensation unit comprises a front condensation assembly, a rear condensation assembly, and a plurality of heat dissipation fins; the front condensation assembly comprises a front left flow tube, a front right flow tube, and a plurality of front heat dissipation tubes; the front left flow tube and the front right flow tube are provided on two opposite lateral sides of the front condensation assembly respectively and are connected to the gaseous phase input tube and the liquid phase output tube respectively; the front heat dissipation tubes are in communication with the front left flow tube and the front right flow tube and are vertically spaced apart; the rear condensation assembly comprises a rear left flow tube, a rear right flow tube, and a plurality of rear heat dissipation tubes; the rear left flow tube and the rear right flow tube are provided on two opposite lateral sides of the rear condensation assembly respectively; the rear heat dissipation tubes are in communication with the rear left flow tube and the rear right flow tube and are vertically spaced apart; gaps between the rear heat dissipation tubes and gaps between the front heat dissipation tubes correspond to each other and jointly form a plurality of through grooves; the heat dissipation fins are in contact with surfaces of the front heat dissipation tubes and surfaces of the rear heat dissipation tubes to enable heat exchange between the heat dissipation fins and the heat dissipation tubes; the front left flow tube and the rear left flow tube are jointly formed by two stamped plates; and, the front right flow tube and the rear right flow tube are jointly formed by two stamped plates. 
     
     
         13 . The gravity-driven gas-liquid circulation device of  claim 11 , wherein at least one left opening is provided between the front left flow tube and the rear left flow tube; at least one right opening is provided between the front right flow tube and the rear right flow tube; and, the left opening and the right opening are diagonally arranged with respect to each other, wherein the bottom side of the left opening is higher than the top side of the right opening. 
     
     
         14 . The gravity-driven gas-liquid circulation device of  claim 11 , wherein both the front heat dissipation tube and the rear heat dissipation tube have a flattened configuration. 
     
     
         15 . The gravity-driven gas-liquid circulation device of  claim 11 , wherein the front heat dissipation tube is provided therein with a plurality of supporting ribs, which extend through the front heat dissipation tube; and, the rear heat dissipation tube is provided therein with a plurality of supporting ribs, which extend through the rear heat dissipation tube. 
     
     
         16 . The gravity-driven gas-liquid circulation device of  claim 11 , wherein a plurality of microstructures are provided on the surface of each heat dissipation fin to increase the area of contact between each heat dissipation fin and air. 
     
     
         17 . The gravity-driven gas-liquid circulation device of  claim 11 , wherein the heat dissipation fins have a corrugated configuration or a serrated configuration. 
     
     
         18 . The gravity-driven gas-liquid circulation device of  claim 1 , wherein the condensation unit includes a plurality of condensation plate assemblies and a plurality of heat dissipation tins; the condensation plate assemblies are vertically spaced apart; the heat dissipation fins are inserted between the condensation plate assemblies and are therefore also spaced apart from one another; and, each condensation plate assembly is provided with a left flow tube on the left side, a right flow tube on the right side, and a flow passage in communication with the left flow tube and the right flow tube, wherein the left flow tube and the right flow tube are connected to the gaseous phase input tube and the liquid phase output tube respectively. 
     
     
         19 . The gravity-driven gas-liquid circulation device of  claim 18 , wherein each condensation plate assembly is formed by two metal plates; wherein, each metal plate is provided with a plurality of protruding structures on the side facing the flow passage in order to increase the strength of the condensation plate assembly.