Refrigerant compressor and refrigerating cycle device

A refrigerating cycle device, comprising:

• a refrigerant compressor comprising a compression mechanism that compresses a refrigerant used in refrigerating cycle, the compression mechanism including a plurality of sliding members,
• wherein at least one of the plurality of sliding members in the compression mechanism is formed of tool steel,
• a first layer comprising a single layer of chromium, a second layer comprising an alloy layer of chromium and tungsten carbide, a third layer consisting essentially of a metal-containing amorphous carbon layer wherein the metal is selected from the group consisting of tungsten and tungsten carbide, and a fourth layer comprising an amorphous carbon layer containing carbon and hydrogen without metals are sequentially formed on a surface of the at least one of the plurality of sliding members,
• the second layer is formed to have a chromium content higher on a side of the first layer than a side of the third layer, and have a tungsten carbide content higher on the side of the third layer than the side of the first layer, and
• the third layer is formed to have a tungsten content or a tungsten carbide content higher on a side of the second layer than a side of the fourth layer;
• and
• a thickness of the fourth layer is larger than a thickness of the third layer;
• a condenser;
• an expansion device;
• and
• an evaporator.