| 摘要 |
PURPOSE:To obtain a working fluid, capable of providing a substitute for a fluorocarbon R134a and hardly affecting the ozonosphere of the stratosphere. CONSTITUTION:This mixed working fluid contains 5-60wt.% difluoromethane and two selected from any of <=95wt.% dimethyl ether, <=95wt.% trifluorodimethyl ether, <=95wt.% tetrafluorodimethyl ether and <=85wt.% difluorodimethyl ether as fluorinated dimethyl ethers composed of only two carbon atoms, one oxygen atom, hydrogen atoms and fluorine atoms or 5-60wt.% difluoromethane and only one selected from either of <=95wt.% tetrafluorodimethyl ether and <=85wt.% difluorodimethyl ether. |
