1, aluminum liner: aluminum has uniform heat conduction, easy molding and beautiful appearance, and can be compounded with other metals or alloys. It is the main material of mid-range cookware.

However, the aluminum liner cannot directly contact with food, and the surface must be protected. Thinning and stretching technology is often used in the manufacture of aluminum liner, which can keep the necessary thickness of the pot edge and bottom, and the liner looks thicker on the premise of saving materials.

2. "Thick kettle" liner: "Thick kettle" liner refers to the liner whose bottom and wall are made of thick metal materials. Because food transfers heat through the liner, under certain conditions, the transferred heat is directly proportional to the heat transfer area, that is, the heat transfer effect of the liner is directly proportional to the thickness of the liner.

Only when the thickness of the inner container reaches 3-4 mm can the heat transfer channel needed for cooking food be fully satisfied, and the effect of Shi Dingjia's "delicious rice and meat" can be achieved. If the thickness of the inner container does not reach 3-4 mm, it cannot be called a real "thick kettle".

3. "Honeycomb" liner: Honeycomb liner means that the thermal effect lines of the liner are designed in a honeycomb arrangement, which can make thermal convection more sufficient and improve energy efficiency than the traditional planar liner.

Extended data:

Matters needing attention

1, avoid connecting the power plug of the rice cooker to the power distribution socket of the lamp holder or desk lamp. Because the wires of general desk lamps are relatively thin, the current carrying capacity is small, and they are easy to age or melt when heated. However, the power and current of the rice cooker are large, which will lead to the heating of the lamp wire and the melting of the outer skin of the wire, causing accidents such as electric shock or fire.

2. Avoid bumping. The inner liner of the rice cooker is easy to deform after being touched, and the bottom of the inner liner cannot be well matched with the electric heating plate after being deformed. It is easy to cook raw rice when cooking, so handle it carefully.

3. Do not immerse the shell and electric heating plate of the inner pot in water. Electrical components should be installed in the lower part of the pot, and can only be wiped clean with a dry cloth after the power supply is cut off. After washing the inner pot, dry the water at the bottom of the pot with a cloth.

4. Don't cook too sour or salty food in the rice cooker. Because the inner liner of the rice cooker is made of aluminum, it will corrode the inner liner and be easily damaged if it is used to cook food that is too sour and salty. In addition, someone should be guarded when cooking and stewing meat to prevent porridge water from overflowing into electrical appliances and damaging electrical components.

When serving rice and soup, avoid using metal spoons without unplugging the power. Use a plastic or wooden bamboo spoon to hold it, and try to unplug the power before using it. When washing the liner, be sure to use a rag. If the liner is stuck with a crispy rice or something, it will be easy to wash in water.