Patent ID: 8162087

Claim:
A construction machine comprising: a vehicle body on which a prime mover for driving a hydraulic pump is mounted; a working mechanism which is installed on said vehicle body and is operated by hydraulic oil supplied from said hydraulic pump; and heat exchange device which is installed on said vehicle body and cools a fluid by cooling air generated from a cooling fan, wherein said heat exchange device is constituted by: a supporting structure which is provided in an upright state on said vehicle body; a first heat exchanger which is provided in said supporting structure by being located upstream of said cooling fan in a flowing direction (A) of the cooling air; a second heat exchanger which is provided in said supporting structure by being located upstream of said cooling fan in the flowing direction (A) of the cooling air and by being juxtaposed in parallel to said first heat exchanger in the flowing direction (A) of the cooling air; a third heat exchanger which is provided in said supporting structure with a clearance with respect to said first heat exchanger by being located further upstream of said first heat exchanger in the flowing direction (A) of the cooling air; a top cover provided on said supporting structure in such a manner as to cover upper positions of said first, second, and third heat exchangers, wherein said top cover is constituted by a fixed type cover which is fixed so as to cover an upper side of said second heat exchanger and a detachable type cover which is detachably provided so as to cover upper sides of said first heat exchanger and said third heat exchanger, and an upper opening being provided in said detachable type cover at a position corresponding to said clearance so as to guide the cooling air into said clearance formed between said first heat exchanger and said third heat exchanger.