VEHICLE AIR-CONDITIONING DEVICE

To reduce stress on coolant piping at the side of a cooling evaporation section.SOLUTION: A vehicle air-conditioning device comprises: cooling decompression section 18a and 18b which are juxtaposed with an air-conditioning decompression section in a flow direction of a coolant and decompress a coolant with heat thereof radiated through a radiator; cooling evaporation sections 19a and 19b which cool a cooling object 70 through evaporation of the coolant decompressed with the cooling decompression sections; a branch section 13a where a coolant flow from a radiator to the air-conditioning decompression section is branched into the cooling decompression sections; a merging section 13b where the coolant discharged from the cooling evaporation sections is merged into the coolant flow from an air-conditioning evaporation section to a compressor; inlet side coolant piping 46 where the coolant flows from the branch section to the air-conditioning decompression section; and outlet side coolant piping 47 where the coolant flow from the cooling evaporation section to the merging section. The inlet side coolant piping is at least partially made of an inlet side elastic member 46a which is elastically deformable. The outlet side coolant piping is at least partially made of an outlet side elastic member 47a which is elastically deformable.SELECTED DRAWING: Figure 1 【課題】冷却用蒸発部側の冷媒配管にかかる応力を軽減する。【解決手段】冷媒の流れにおいて空調用減圧部と並列に配置され、放熱器で放熱された冷媒を減圧させる冷却用減圧部１８ａ、１８ｂと、冷却用減圧部で減圧された冷媒を蒸発させることによって冷却対象物７０を冷却する冷却用蒸発部１９ａ、１９ｂと、放熱器から空調用減圧部へ流れる冷媒を冷却用減圧部側へ分岐させる分岐部１３ａと、空調用蒸発部から圧縮機へ流れる冷媒に、冷却用蒸発部から流出した冷媒を合流させる合流部１３ｂと、分岐部から空調用減圧部へ冷媒が流れる入口側冷媒配管４６と、冷却用蒸発部から合流部へ冷媒が流れる出口側冷媒配管４７とを備え、入口側冷媒配管の少なくとも一部は、弾性変形可能な入口側弾性部材４６ａであり、出口側冷媒配管の少なくとも一部は、弾性変形可能な出口側弾性部材４７ａである。【選択図】図１