Abstract: A food cooking method and a device in which a combustion chamber and a food cooking vessel are separated by a surface having fine holes or slits, and a fuel or a substance which gives off an aroma produced in the combustion chamber while the combustion chamber is screened from the atmosphere, such that heat and aroma are transmitted to the food as the aromatic and hot combustion gasses are discharged to the exterior through the food in the food cooking vessel. In the cooking method, flavor is enhanced as a smoky aroma is directly added to the foods in forms of pastes and the foods in a solid phase which is distributed by mixing into a liquid phase or semi-liquid phase. The method also can be used to remove unwanted smells and to cook rice.

Abstract: The present invention relates to a heat exchanging type boiler that includes: a water retaining reservoir 10 in which a predetermined amount of water is charged; and a combustion chamber 33 for emitting heating gas at a high temperature to the water in the water retaining reservoir 10 through a heating gas supply pipe 20 such that the water in the water retaining reservoir 10 is raised to produce steam at a high pressure, the boiler characterized in that a water discharging film 32 disposed between the heating gas supply pipe 20 and the water and having a plurality of fine through holes such that the water in the water retaining reservoir 10 is not leaked to the combustion chamber 33 and at the same time the heating gas emitted to the water by means of the heating gas supply pipe 20 is distributed in substantially small bubble form.

Abstract: The present invention relates to a heat exchanging type boiler that includes: a water retaining reservoir 10 in which a predetermined amount of water is charged; and a combustion chamber 33 for emitting heating gas at a high temperature to the water in the water retaining reservoir 10 through a heating gas supply pipe 20 such that the water in the water retaining reservoir 10 is raised to produce steam at a high pressure, the boiler characterized in that a water discharging film 32 disposed between the heating gas supply pipe 20 and the water and having a plurality of fine through holes such that the water in the water retaining reservoir 10 is not leaked to the combustion chamber 33 and at the same time the heating gas emitted to the water by means of the heating gas supply pipe 20 is distributed in substantially small bubble form.