US Patent 9326633 Steamer

An improved steamer for heating food includes a base with a heating unit and a controlling switch, a plurality of pot units, a plurality of racks, and a lid. The pot units seat on top of the base, and the racks are placed on a bottom of each pot unit. Several steam ducts are arranged on ends of the pot units, and an opening is defined in the steam ducts. A cover is put on the opening. The lid is placed onto the upper pot unit. When the steamer with food is heated, the steam from the heating unit is introduced into the pot units from the openings of the steam ducts to heat the food. Each pot unit is isolated, and the steam introduced will not mix, and odors from the pot units will not interfere with other pot units.