VEHICLE AIR-CONDITIONING DEVICE

To curb a pressure increase in a coolant flow passage when cooling is not required for a cooling object.SOLUTION: A vehicle air-conditioning device comprises: cooling decompression sections 18a and 18b which are juxtaposed with an air-conditioning expansion valve 15 in a flow direction of a coolant; cooling evaporation sections 19a and 19b; a branch section 13a where a coolant flow from a condenser 12 to the air-conditioning expansion valve 15 is branched into the cooling decompression sections 18a and 18b; a merging section 13b where the coolant discharged from the cooling evaporation sections 19a and 19b is merged into the coolant flow from an air-conditioning evaporator 16 to a compressor 11; a cooling passage section 460 where the coolant flows from the branch section to the cooling decompression sections 18a and 18b; a battery solenoid valve 14b which opens and closes the cooling passage section 460; and an air-conditioning control unit 50 which controls operation of the cooling decompression sections 18a and 18b and the battery solenoid valve 14b. The air-conditioning control unit 50 closes the battery solenoid valve 14b and sets openings of the cooling decompression sections 18a and 18b so as to allow the coolant to pass therethrough when no request is made for cooling a battery 70.SELECTED DRAWING: Figure 14 【課題】冷却対象物の冷却が不要な場合における冷媒流路内の圧力上昇を抑制する。【解決手段】冷媒の流れにおいて空調用膨張弁１５と並列に配置される冷却用減圧部１８ａ、１８ｂと、冷却用蒸発部１９ａ、１９ｂと、凝縮器１２から空調用膨張弁１５へ流れる冷媒を冷却用減圧部１８ａ、１８ｂ側へ分岐させる分岐部１３ａと、空調用蒸発器１６から圧縮機１１へ流れる冷媒に、冷却用蒸発部１９ａ、１９ｂから流出した冷媒を合流させる合流部１３ｂと、分岐部から冷却用減圧部１８ａ、１８ｂへ冷媒が流れる冷却用流路部４６０と、冷却用流路部４６０を開閉する電池用電磁弁１４ｂと、冷却用減圧部１８ａ、１８ｂおよび電池用電磁弁１４ｂの作動を制御する空調制御装置５０と、を備え、空調制御装置５０は、バッテリ７０を冷却する要求がない場合、電池用電磁弁１４ｂを閉じるとともに、冷却用減圧部１８ａ、１８ｂを冷媒の通過が可能な開度にする。【選択図】図１４