AIR CONDITIONER

To provide an air conditioner capable of suppressing dew formation on a heat generating body and its peripheral portion.SOLUTION: An air conditioner (1) includes: a main refrigerant circuit (4) in which a compressor (11), a heat source side heat exchanger (13), a first expansion valve (15) and a use side heat exchanger (16) are provided and a refrigerant flows; an auxiliary refrigerant circuit (5) including a cooling member (41) in which the refrigerant branched from the main refrigerant circuit (4) flows and having the refrigerant branched from the main refrigerant circuit (4) and flowing therein; and a heat generating body (31) cooled by the cooling member (41). Piping (6) for causing part of the refrigerant discharged from the compressor (11) to flow is connected to piping (5) between the cooling member (41) and a second expansion valve (43) provided in the auxiliary refrigerant circuit (5) and expanding the refrigerant flowing to the cooling member (41).SELECTED DRAWING: Figure 7 【課題】発熱体及びその周辺部における結露の発生を抑制できる空気調和機を提供する。【解決手段】本発明の空気調和機（１）は、圧縮機（１１）、熱源側熱交換器（１３）、第１膨張弁（１５）および利用側熱交換器（１６）が設けられ、冷媒が流れる主冷媒回路（４）と、主冷媒回路（４）から分岐された冷媒が流れる冷却部材（４１）が設けられ、主冷媒回路（４）から分岐された冷媒が流れる副冷媒回路（５）と、冷却部材（４１）によって冷却される発熱体（３１）とを備え、圧縮機（１１）から吐出した冷媒の一部を流す配管（６）が、冷却部材（４１）と副冷媒回路（５）に設けられ冷却部材（４１）へと流れる冷媒を膨張させる第２膨張弁（４３）との間の配管（５）に接続されている。【選択図】図７