Air-conditioner of construction machinery

Abstract

The object of the present invention is to provide an air-conditioning apparatus so as not to make space in an operator's cab narrow and to bring about a comfortable working environment in the operator's cab when installing an air-conditioning apparatus in a construction machine. For these purposes it is structured that while the body unit 4 of an air-conditioning apparatus is disposed under the floor surface 9 of the cab 1, cold air and hot air ducts 10L, 10R, 11L, 11R which are connected to the body unit, are routed under the floor of the cab and are taken out into the inside of the cab. In addition, the cold air and hot air outlets 10La, 10Ra, 11La, 11Ra are disposed at both left and right sides at the front part of the cab. Also, by providing two evaporators 6L,6R, air of different temperatures can be blown out through the left and right outlets.

Description

technical field [0001] The invention relates to an air conditioner on construction machines such as hydraulic excavators. Background technique [0002] In recent years, construction machines such as hydraulic excavators have been widely equipped with air conditioners for operating rooms in order to improve the working environment for operators. In the past, the main unit (built-in heat exchanger for cold air, heat exchanger for warm air) constituting the air conditioner has been widely used. Units such as blowers, blowers, etc.) are arranged under or behind the seats in the operator's cabin. Furthermore, ducts serving as outlet channels for conditioned air in the main body unit are piped toward, for example, the right side or rear side of the operating room, and these main unit units or ducts occupy a considerable space in the operating room. [0003] However, in the above-mentioned operation room, in addition to the operator's seat and the above-mentioned air conditioner, ...

AI Technical Summary

Problems solved by technology

[0004] In construction machinery such as hydraulic excavators, the door of the elevator door is generally installed on the left side of the operator's room. In this case, it is difficult to arrange the pipes of the aforementioned air conditioner on the left side of the operator's room. There are cases where a device for the door is not installed as the air outlet for defrosting

[0005] Have again, when the sun shines on the half body of the operator, it is more comfortable to reduce the temperature of the side irradiated by the sun and increase the temperature of the opposite side if the temperature of the cold wind blown from the left and right pipelines is different. In the device, the temperature of the cold air blown out from the left and right ducts at the same time cannot be different, which is also a problem, and these problems will be solved in the present invention

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