| 摘要 |
PURPOSE: A heat exchange pipe for a refrigerating machine is provided to maximize efficiency of heat exchange. CONSTITUTION: A heat exchange pipe includes an inner pipe(10) forming a coolant circulation channel; and an outer pipe(20) forming a refrigerant circulation channel with the inner pipe. At least two spiral grooves(30) are formed on a periphery of the inner pipe to form the refrigerant circulation channel and to protrude toward an inside of the inner pipe. Peak parts of the spiral grooves are formed to be attached on an inside wall of the outer pipe so that at least two of the refrigerant circulation channel are formed independently. Preferably, three of the spiral grooves are formed on the periphery of the inner pipe. Ratio between flow rates of the inner pipe in which coolant circulates and the spiral grooves in which refrigerant circulates is 1:3. Area of the metal inner pipe contacting with refrigerant and coolant is maximized thereby. Heat transmitting efficiency is maximized as refrigerant and coolant are cooled down not by fluid with low heat transmitting efficiency but by direct contact with the pipe, a contacting medium.
|
