| 摘要 |
PURPOSE: A dual air-conditioner system is provided to prevent refrigerant from moving to an air conditioning unit for back seats by closing the magnetic valve arranged on the upper part of a branch pipe if an air conditioner operates in single air-conditioner manner. CONSTITUTION: A dual air-conditioner system(100) for a vehicle comprises a first air conditioning unit for front seats(101) and a second air conditioning unit for back seats(102). A compressor(110), a condenser(120), a front expansion valve(130) and a front evaporator(140) are successively connected and form a closed circuit to constitute the first air conditioning unit for front seats. A rear expansion valve(150) and a rear evaporator(160) are branched from the condenser and are successively connected to the compressor to constitute the second air conditioning unit for back seats. The branching is made at a position adjacent to the condenser. An electronic valve(170) which is controlled by a controller(180) to be selectively opened and closed is installed at the branch pipe(195) between the rear expansion valve and the condenser and the controller closes the electronic valve if only the air conditioning unit for front seats operates.
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