| 摘要 |
<P>PROBLEM TO BE SOLVED: To inhibit leak current of a motor by preventing a drop of a voltage insulation property in a compressor in a freezing device using a coolant represented by molecular formula 1: C3HmFn (wherein m and n independently represent an integer of 1 to 5, provided that the sum total of m and n is 6) and having a double bond in its molecular structure. <P>SOLUTION: This freezing device 20 is provided with a coolant circuit 10 for circulating a coolant by a compressor 30 to perform a freezing cycle. The compressor 30 is provided with a fluid machine 82 compressing the coolant and the motor 85 driving the fluid machine 82. The compressor 30 uses a freezer oil having a volume resisitivity of 10<SP>10</SP>Ωm or above at 20°C. <P>COPYRIGHT: (C)2010,JPO&INPIT |
