Abstract: A painting apparatus having a booth with a painting room for defining a path having a U-shaped configuration wherein a front painting zone and a rear painting zone are adjacent each other in the legs of the path. An intermediate zone is located at the bight of the U-shaped path. An air supply and exhaust system is provided for the zones. A duct to the front and rear zones does not interfere with a duct to the intermediate zone. An exhaust system re-circulates the air in the intermediate zone and includes a solvent adsorber and a total heat exchanger upstream in the direction of air flow for adsorbing solvent and recovering sensible and latent heat.

Abstract: A method of operating an air-supplied type coating booth in which conditioned air supplied from an air supply blower is enforced downwardly to the inside of a tunnel-shaped coating booth and the air in the coating booth is drawn together with paint mists and the likes down to the beneath of a booth floor by way of an air exhaust blower comprises the steps of detecting the flow velocity of air streams flowing into or out of inlet and the exit of the coating booth, applying primary and secondary averaging processings for signals for averaging variations caused by external disturbances fluctuating at relatively shorter and longer periods of time, judging the thus averaged direction and the flow velocity of the air streams at the inlet and the exit, variably controlling the flow rate of exhaust from the exhaust blower in accordance with the direction and the flow velocity.

Abstract: A method of operating an air-supplied type coating booth in which conditioned air is enforced from an air supply blower downwardly to the inside of a coating booth and then discharged to the beneath of the booth floor by an exhaust blower, in which the booth operation is stopped after memorizing the balanced flow rates for the supply blower and the exhaust blowers kept just before the completion of the booth operation, and the supply blower and the exhaust blower are automatically set to the above-mentioned balanced flow rates respectively upon re-starting the booth operation again. Balanced and stable booth operation where no air streams flow into or out of the inlet and the exit can be attained rapidly at the start of the booth operation.

Abstract: A method of operating an air-supplied type coating booth adapted to enforce conditioned air by an air supply blower through a filter downwardly to the inside of a tunnel-shaped coating booth at a predetermined flow velocity and then drawn to discharge together with coating mists, etc. to the beneath of the floor comprises the step of detecting the flow velocity of conditioned air flowing through the filter to the inside of continuously, applying primary and secondary averaging processings for the detected signals containing variations fluctuating at relatively shorter and longer periods respectively, comparing the value obtained from the signals applied with the secondary averaging processing with a predetermined flow velocity value and variably controlling the flow rate of the air supplied from the air supply blower depending on the deviation and thereby maintaining the flow velocity of the conditioned air flowing to the inside of the coating booth always constant.

Abstract: An air conditioner for a coating booth is constructed so as to intake the air through a filter for eliminating dust, to heat the air by a plate fin coil heater to the extent that it is not excessively saturated, to atomize the steam directly into the air via a steam atomizing tube, to contact the air including the atomized steam with water flowing down on the surfaces of the wet walls, to make the recirculating water absorb the steam for giving energy for humidifying to the water, to humidify the air by contacting the flowing water and to feed the humidified air through an eliminator to a coating booth at a temperature controlled by another plate fin coil heater.

Abstract: An air conditioner for a coating booth wherein for the purpose of feeding the air into the coating booth at a predetermined temperature and humidity there are provided devices for heating the recirculating water in the storage tank to the dew point temperature and devices for electrical controlling to automatically keep the temperature and humidity of the air to predetermined values.