A vacuum-insulated cooking device comprises: a vacuum-insulated body including a bottom plate and a sidewall extending from an edge of the bottom plate to one side, wherein the bottom plate and the sidewall are vacuum-insulated by a vacuum pressure lower than atmospheric pressure; a shelf which is accommodated in a storage space formed by the bottom plate and the side wall and on which stones and food materials heated to a high temperature from the outside are stored layer by layer; and a lid, having the same shape as an opening of the vacuum-insulated body, for opening and closing of the opening.

A vacuum-insulated cooking device comprises: a vacuum-insulated body including a bottom plate and a sidewall extending from an edge of the bottom plate to one side, wherein the bottom plate and the sidewall are vacuum-insulated by a vacuum pressure lower than atmospheric pressure; a shelf which is accommodated in a storage space formed by the bottom plate and the side wall and on which stones and food materials heated to a high temperature from the outside are stored layer by layer; and a lid, having the same shape as an opening of the vacuum-insulated body, for opening and closing of the opening.

A pressure fryer includes a cooking well having a conical bottom and a substantially vertical sidewall extending upwardly from the conical bottom. A series of vertical fins is mounted to the sidewall. The vertical fins are spaced from one another and a series of undulating fins are mounted between the vertical fins. A heat shield surrounds the cooking well and vertical and undulating fins. The heat shield has an upper wall extending to the cooking well and an outer cover that covers the heat shield and defines an exhaust gas chamber between the outer cover and the heat shield. The fryer includes a multi-shelf rack system and a lift operably connected to the multi-shelf rack system.

A pressure fryer includes a cooking well having a conical bottom and a substantially vertical sidewall extending upwardly from the conical bottom. A series of vertical fins is mounted to the sidewall. The vertical fins are spaced from one another and a series of undulating fins are mounted between the vertical fins. A heat shield surrounds the cooking well and vertical and undulating fins. The heat shield has an upper wall extending to the cooking well and an outer cover that covers the heat shield and defines an exhaust gas chamber between the outer cover and the heat shield. The fryer includes a multi-shelf rack system and a lift operably connected to the multi-shelf rack system.

A cooking vessel includes a base having a flat bottom and a sidewall connected to and surrounding the base, thereby defining an interior space configured for containing food. The base comprises a layered composite material that includes a first layer of the composite material has a positive Poisson's ratio (PPR) and a second layer of the composite material is disposed in contact with the first layer. The cooking vessel includes a material having a negative Poisson's ratio (NPR).

A cooking vessel includes a base having a flat bottom and a sidewall connected to and surrounding the base, thereby defining an interior space configured for containing food. The base comprises a layered composite material that includes a first layer of the composite material has a positive Poisson's ratio (PPR) and a second layer of the composite material is disposed in contact with the first layer. The cooking vessel includes a material having a negative Poisson's ratio (NPR).

A cooking vessel includes a base having a flat bottom and a sidewall connected to and surrounding the base, thereby defining an interior space configured for containing food. The base comprises a layered composite material that includes a first layer of the composite material has a positive Poisson's ratio (PPR) and a second layer of the composite material is disposed in contact with the first layer. The cooking vessel includes a material having a negative Poisson's ratio (NPR).