To improve performance and reliability of a refrigerating device using an R134a by using a specified raw material in polyol ester oil, using in a specified physical properties range, adding a special additive, and maintaining purity of hydrogen fluoride carbide refrigerant at a high value, and suppressing equilibrium moisture of a refrigerating cycle.
In a compressor comprising a rotary compression element and a dynamo-electric element for driving the rotary compression element and consisting of a stator having a winding and a rotor situated at the inside of the stator, the winding is covered by an insulating material having two-layer structure that a layer formed of heat resisting ester or ester imide is applied on the inside and a layer formed of amide imide is applied on the outside.
KOMATSUBARA TAKEO
SUNAGA TAKASHI
TAKAHASHI YASUKI
AKAZAWA KIYOSHI
ITO TORU
WATANABE MASATO
