| 摘要 |
PURPOSE:To suppress noises and prevent drying of the air by providing water tanks on the outside of the ceiling plate, both side plates and front plate of an air supply duct. CONSTITUTION:In an air supply 5 which is constituted with a ceiling plate 1, front plate 2 and bottom plate 3 and both side plates 4 a combustion cylinder 7 is provided and on the suction side of the air supply duct a propeller blower 8 provided, and air outlet opening 9 is provided on the downstream side. On the ceiling plate a water tank 10 is provided and a water tank 11 is placed round the front plate and both side plates of the duct. The ceiling plate of the water tank 10 is provided with an opening 12 for passing steam evaporating in the tank. The supplied air from an air passage 14 is sent toward the upper face of the water tank. Noises developed in the combustion section are shielded by the water tanks which surround the air supply duct, so that the water tanks suppress the noises, preventing outside radiation of noises, and at the same time the water tanks suppress vibration in the ceiling plate, front plate and both side plates in order to keep them from developing noises. Further, the water in the water tank is heated by the combustion section and evaporates. Steam from the evaporation is diffused by the air from the air passage into a room so that drying of the room is prevented.
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