Abstract: A home-style decoctor endowed with steamy boiling function includes a main body equipped with a heater; a heating vessel; a support plate for allowing a to-be-boiled object to be placed above the surface of water stored in the heating vessel; means for supplying water for boiling into the heating vessel so that the to-be-object is immersed; a steam collector for gathering steam produced when the to-be-boiled object is decocted with water; means for condensing the steam collected into the steam collector; and steam/condensed water guiding means for leading the steam present in the heating vessel to the steam collector and the condensed water placed in the steam collector to the heating vessel. With such construction, undried or white ginseng can become red ginseng extract by producing such useful components as several kinds of phenolic compounds and maltol, anti-oxidants, and ginsenosides Rg and Rh through steam-boiling, drying and re-boiling.

Abstract: A home-style decoctor endowed with steamy boiling function includes a main body equipped with a heater; a heating vessel; a support plate for allowing a to-be-boiled object to be placed above the surface of the water stored in the heating vessel; a water supply for supplying water for boiling into the heating vessel so that the to-be-object is immersed; a steam collector for gathering stream produced when the to-be-boiled object is decocted with water; a condenser for condensing the steam collected into the steam collector; and a stream/condensed water guide for leading the steam present in the heating vessel to the steam collector and the condensed water placed in the steam collector to the heating vessel. With such construction, undried or white ginseng can become red ginseng extract by producing such useful components as several kinds of phenolic compounds and maltol, anti-oxidants, and ginsenosides Rg and Rh through steam-boiling, drying and re-boiling.

Abstract: A home-style decoctor endowed with steamy boiling function includes a main body equipped with a heater; a heating vessel; a support plate for allowing a to-be-boiled object to be placed above the surface of water stored in the heating vessel; means for supplying water for boiling into the heating vessel so that the to-be-object is immersed; a steam collector for gathering steam produced when the to-be-boiled object is decocted with water; means for condensing the steam collected into the steam collector; andsteam/condensed water guiding means for leading the steam present in the heating vessel to the steam collector and the condensed water placed in the steam collector to the heating vessel. With such construction, undried or white ginseng can become red ginseng extract by producing such useful components as several kinds of phenolic compounds and maltol, anti-oxidants, and ginsenosides Rg and Rh through steam-boiling, drying and re-boiling.

Abstract: A double boiler for domestic use includes a heating vessel for receiving water and a filtering device containing food, the vessel having a lid on the top; a main case having a reception hollow and a heater at one side so that the heating vessel is mounted and heated; a steam condenser incorporated in the top end of the main case so that steam produced from the heating vessel is collected; steam cooling device for circulating cooling water along the inner and outer circumferential surfaces of the steam condenser so that the steam collected in the steam condenser becomes cooled; and a condensed water collecting device for receiving the heating vessel to the hollow of the main case and at the same time connecting the heating vessel and steam condenser so that the condensed water condensed in the steam condenser is gathered into the heating vessel.