| 摘要 |
PROBLEM TO BE SOLVED: To change a preset temperature in a cab box while operating an operation lever. SOLUTION: Temperature adjusting switches 32, 33, and 34 are arranged in a grip part 17B of the operation lever 17. These temperature adjusting switches 32, 33, and 34 are connected to a control unit 36. The control unit 36 arithmetically operates in which degree of the air volume hot air or cold air is blown from either of air blowing ports 29, 30A, 30B, 31 according to detecting signals from a room temperature sensor 37, a water temperature sensor 38, an outside air temperature 39, and a solar radiation sensor 40 for allowing a temperature in the cab box 12 to reach the preset temperature T inputted from the temperature adjusting switches 32, 33, and 34, and outputs this arithmetically operated control signal to an air conditioner 18.
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