Toyotomi Co., Ltd.

Tomohiko Takeuchi

Yutaka Nakanishi

Hiroyuki Onogawa

An object of the present invention is to provide a hot air space heater that is capable of blowing hot air out of a whole wide hot air outlet provided at a front plate of a frame of the heater while making the heater smaller in depth. A burner is arranged so as to be close to one side of the frame. A heat-discharge portion is constructed on the burner. On the other side of the frame, an accessory-receiving space is defined side by side with the heat-discharge portion. Between the hot air outlet provided at the front plate of the frame and a wall portion positioned in front of the accessory-receiving space, an extended air feed space is defined. Air fed by a fan into a duct structure is heated while passing through between a plurality of heat-exchange pipes. The air is blown against a front wall of the duct structure and a plate-like member of an air guide provided on a rear side of louvers. Heated air blown against the front wall flows out forward through a first air flow path above the plate-like member. Heated air blown against the plate-like member is guided into the extended air feed space and flows out forward through the louvers.

Hot air space heater

An intake/exhaust type combustion equipment capable of permitting oxygen in a proper amount required for stable combustion to be constantly fed to the combustion equipment, irrespective of outdoor air conditions. An intake air temperature detection sensor is arranged for detecting a temperature of combustion air fed to a burner by a combustion air feed fan and an oxygen data output element is arranged for outputting oxygen data corresponding to an oxygen concentration in combustion air depending on the temperature detected by the intake air temperature detection sensor. The oxygen data output element outputs oxygen data on the oxygen concentration or a variation in oxygen concentration based on the detected temperature. A combustion variation unit is configured so as to output a feed rate variation command for varying balance between the amount of fuel fed to the burner and the amount of combustion air fed thereto to ensure that combustion air is fed in a proper amount to the burner, on the basis of the oxygen data. Thus, the combustion variation unit controls a fuel feed element and the combustion air feed fan so that data on the amount of oxygen are obtained from data on a temperature of intake air, to thereby maintain balance between the amount of fuel fed to the burner and the amount of oxygen required for combustion in the burner.

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Chita, Japan

Tomohiko Takeuchi