AIR CONDITIONING SYSTEM FOR AUTOMOBILE

摘要

PROBLEM TO BE SOLVED: To improve efficiency of an air conditioning system used for a fuel cell vehicle while maintaining stable air conditioning capacity.

SOLUTION: High pressure air delivered from a compressor 20 is supplied to a fuel cell 70 and discharged air discharged from the fuel cell 70 is sent in an expander 23 and is expanded. A bypass passage 41 bypassing the fuel cell 70 is provided in an air side passage 11 and part of high pressure air is directly sent in the expander 23. Air which expands in the expander 23 and gets low temperature is sent to an evaporation cooling heat exchanger 14 and is used for cooling air supplied to a passenger compartment. When load of the fuel cell 70 fluctuates, quantity of high pressure air flowing in the bypass passage 41 is adjusted. Quantity of low temperature air sent to the evaporation cooling heat exchanger 14 from the expander 23 is not changed and high pressure air of a quantity corresponding to load is supplied to the fuel cell 70.

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