| 摘要 |
An air-conditioning system for a truck comprises an air-conditioning unit mounted on a vehicle roof, which has an evaporator and other components for constituting a refrigerating cycle to control temperature of air and to supply the conditioned air into a passenger compartment through multiple blower ducts. The vehicle roof is provided with multiple roof openings, through which the air-conditioning unit and the multiple blower ducts are connected. Each of the blower ducts has an air inlet opening at its upstream side and blower openings at its downstream side, and at least two of the air inlet openings are arranged to close to each other so that a bifurcated connecting element connects the two blower ducts to the unit case through one roof opening. Further, multiple blower openings for different operational modes, such as a face blower opening and a nap-taking blower opening, are formed in a common blower duct, to reduce the number of blower ducts and thereby the number of the roof openings.
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