Abstract: An air conditioner cleaning device with which the use of detergent can be decreased to zero or minimized and washing time can be shortened. A feature is that the device comprises a watertight cover to receive washings for the air conditioner that is set in the ceiling, the nozzles—located above the watertight cover—for washing an air conditioner from which steam, warm water, and air for drying gush out, and a steam generator that connects to the steam supply line of the nozzles so that the steam generated with the steam generator and warm water shall be below the specified temperature and gush out from said nozzles.

Abstract: The object of the present invention is to provide a dust measuring system, which can efficiently measure an amount of dust accumulated in a duct and can display the measured value at real time in a remote place. The system of the present invention comprises a running device moving in the duct by remote-controlled operation, being equipped with an accumulated dust separator, a dust concentration measuring unit and a video camera, means for measuring the dust separated and turned to loose state by said accumulated dust separator using said dust concentration measuring unit and for transmitting the measured data to a data processing unit, and a display unit for displaying an image including numerical values and graphs prepared by said data processing unit.

Abstract: The object of the present invention is to provide a robot system for duct cleaning, by which it is possible to detach and remove dust, dirt, etc. inside ducts almost completely and to reduce personnel cost and other cost, and which can be applied to any type of duct. The present invention provides a robot system for duct cleaning used for detaching and removing dust, dirt, etc. attached and accumulated inside the duct. The robot system comprises a robot unit for detaching and removing dust inside the duct and a hose of a dust collector connected to the duct and used for sucking the detached dust. By injecting the air from the air hose made of freely flexible material in backward direction, the robot is moved forward.