Abstract: The present application relates to a cooking device, comprising an inner shell, wherein a heat insulating plate is arranged in the inner shell; a heating assembly is arranged above the heat insulating plate; the heating assembly comprises a heating element and a heating plate; the heating plate is arranged above the heating element; an air duct is arranged between the heat insulating plate and the heating plate; air holes are formed at ends of the heating plate; a cooking plate is further arranged on the heating plate; air vents are formed on the cooking plate; the air vents are communicated with the air holes of the heating plate; and, the air duct is communicated with the air holes of the heating plate.

Abstract: A 3D flame projection system is provided, comprising a light source and a light-transmittable hood. The light source is disposed inside the light-transmittable hood. The 3D flame projection system further comprises a lens which has different refractive indexes for refracting light generated by the light source and splitting the light into a plurality of light beams at different angles and/or has different light transmittances for allowing light generated by the light source to partially transmit through the lens. The 3D flame projection system has the following advantages: simple structure, low cost, small space occupation, realistic flame dancing effect, and it is advantageous for realization of ultrathin production of fireplaces.

Abstract: A 3D flame projection system is provided, comprising a light source and a light-transmittable hood. The light source is disposed inside the light-transmittable hood. The 3D flame projection system further comprises a lens which has different refractive indexes for refracting light generated by the light source and splitting the light into a plurality of light beams at different angles and/or has different light transmittances for allowing light generated by the light source to partially transmit through the lens. The 3D flame projection system has the following advantages: simple structure, low cost, small space occupation, realistic flame dancing effect, and it is advantageous for realization of ultrathin production of fireplaces.

Abstract: A radiating fin with a bent radiating portion and an electrothermal oil heater using the same are provided. The radiating fin comprises a main body with an oil guide groove formed therein, connecting sleeves extending in a horizontal direction being provided at an upper end and a lower end of the main body; a bent radiating portion is formed within a region, a certain distance away from the middle, of an edge of at least one end of the main body; and an upper end and a lower end of the bent radiating portion are located in different vertical planes, or the upper end and the lower end of the bent radiating portion are located in a same vertical plane, and at least one portion between the upper end and the lower end is bent to form a side-raised structure.

Abstract: A radiating fin with a bent radiating portion and an electrothermal oil heater using the same are provided. The radiating fin comprises a main body with an oil guide groove formed therein, connecting sleeves extending in a horizontal direction being provided at an upper end and a lower end of the main body; a bent radiating portion is formed within a region, a certain distance away from the middle, of an edge of at least one end of the main body; and an upper end and a lower end of the bent radiating portion are located in different vertical planes, or the upper end and the lower end of the bent radiating portion are located in a same vertical plane, and at least one portion between the upper end and the lower end is bent to form a side-raised structure.