Patent ID: 6166466
Filing Date: 2000-12-26
Classification: C08G,C10M,H01B,Y10T

Abstract:
A refrigeration unit comprising a refrigeration compressor using hydrofluorocarbons as a refrigerant; a motor for driving the refrigeration compressor and including an enameled wire as a magnet wire of the motor; and a refrigerating machine oil in contact with the enameled wire and compressor and which is a synthetic lubricating oil having at least one ester bond in a molecule, said enameled wire being coated with an insulating material containing a compound having at least one carbodiimide group represented by the following formula (1):.paren open-st.N.dbd.C.dbd.N--R.sub.1 .paren close-st..sub.n1( 1)wherein R.sub.1 is an isocyanate residue, and n.sub.1 is an integer of 1-100;or by the following formula (2):R.sub.3 --R.sub.2 .paren open-st.N.dbd.C.dbd.N--R.sub.2 .paren close-st..sub.n2 R.sub.4 ( 2)wherein R.sub.2 is an isocyanate residue, R.sub.3 and R.sub.4 are each a terminal group; and n.sub.2 is an integer of 1-100;or by the following formula (3):.paren open-st.N.dbd.C.dbd.N--R.sub.5 .paren close-st..sub.n3 .paren open-st.Y--R.sub.6 .paren close-st..sub.m ( 3)wherein Y is a residue of a compound having a functional group reactive with isocyanate; R.sub.5 and R.sub.6 are each an isocyanate residue; and n.sub.3 and m are each an integer of 1-100;or by the following formula (4):R.sub.7 --N.dbd.C.dbd.N--R.sub.8 ( 4)wherein R.sub.7 and R.sub.8 are each a terminal group.