Zhejiang gas shell manufacturers include Ningguo Hong Xin Electric Furnace Factory, Yongkang Qingxi Town Paixi Road Foundry and Cixi Changhe Agile Kitchen Accessories Factory. The bottom shell structure of the cooker comprises a bottom shell main body and a positioning frame, and the bottom. The housing includes a mounting shell and a plate located at the top of the mounting shell. An installation cavity is arranged in the installation shell, and the positioning frame is arranged on the side of the bottom shell.