1. Rice cooker

The rice cooker we use every day to cook rice has a stainless steel or aluminum pot inside, an enamel cylinder shell outside, and an inlaid pot at the bottom. Electric hot plate with heater. The rice cooker is equipped with two automatic devices: a thermal bimetal thermostat and a magnetic switch. Thermal bimetal thermostat consists of two metal sheets with different expansion coefficients. Due to expansion, when the temperature rises to a certain level, it will automatically power off; when the temperature drops, it will automatically power on.

The rice cooker is convenient and safe. The procedure is to wash the rice - add water - cover - press the button. After the rice is automatically cooked, the temperature inside the fort can be maintained at the eating temperature. When using the rice cooker, be sure to note that you cannot wash the inner pot and other components with tap water before powering off, and you cannot wipe them with wet things, as this can easily cause leakage and endanger safety.

2. Induction cooker

Induction cooker is also called induction cooker. Compared with gas stove, it has the characteristics of high thermal efficiency, low energy consumption, safety without open flame, clean and hygienic. Induction cookers use the principle of electromagnetic induction for heating. The output power is usually 150 to 2000 watts, which can be continuously adjusted during use. It is generally equipped with flat-bottomed containers with good magnetic conductivity such as flat-bottomed iron pots, enamel pots, and stainless steel pots. The temperature inside the pot can reach 50°C to 200°C during operation. Users of the simplest induction cooktop can have three different working modes: "heating", "keep warm" and "frying", and more complex functions and temperature control can be adjusted.

3. Microwave oven

The microwave oven that entered thousands of households in 1967 was made using the characteristics of microwaves. Microwaves are sensitive to moisture-containing food and fatty substances and can be absorbed by them. Absorbed; when it is reflected by metal, the conductor cannot absorb its energy; it can also pass through insulating materials freely without energy consumption.

The cabinet of a microwave oven is much like a TV case. It cooks rice and vegetables very quickly. What's even more surprising is that the food containers are heated in the microwave without being hot to the touch. Its thermal efficiency is comparable to that of induction cooktops and can reach 80%. All of these are closely related to the characteristics of "microwaves".

Microwave ovens are known as the "liberator of women". Modern microwave ovens have more functions and related microwave recipes have been developed, which greatly enriches people's dining table life.

4. Electric oven

The electric oven is a household electric cooker with many uses. It can be used to roast chicken, duck, fish, meat and other dishes, and can also make cakes, Bread, pancakes and other foods are also ideal for processing peanuts, melon seeds, beans and other roasted seeds and nuts.

Electric ovens are divided into ordinary types and far-infrared types. The core component of a far-infrared electric oven is composed of multiple tubular or sheet-shaped far-infrared heating components, which are installed at the top and bottom of the box cavity. Far infrared is actually a kind of invisible light. It has strong penetrating ability. It can be used to heat food. It has the advantages of short baking time, high thermal efficiency, not affecting the nutritional content of food and being hygienic.

5. Sandwich stove

The sandwich stove is an electric cooker used to bake sandwich bread. It can also be used to fry poached eggs, pot stickers and other foods. The sandwich oven is mainly composed of two upper and lower heating chamber membranes and a temperature control component. The heating cavity membrane has four triangular concave molds, and the upper and lower molds are opened and closed by hinges so that the food to be baked can be placed into the cavity membrane. There is a tubular electric heating component inside the cavity membrane, and its surface is sprayed with polyvinyl fluoride paint, which is non-toxic, resistant to high temperatures, corrosion, and non-stick to food. After power is turned on, the red neon light lights up and the tubular electric heating component begins to heat up. When it reaches the set fixed temperature (usually 225°C, which cannot be adjusted), the green neon light lights up and the electric heating component stops heating. When the temperature drops to a certain value When the time comes, the green neon light goes out, and the heating is turned on again, and it works over and over again. After baking, open the top cover and you can eat delicious food.

6. Dishwasher

A dishwasher is a kitchen appliance used in homes, hotels, etc. to wash and clean bowls, basins, dishes, cups, knives, forks and other tableware. Use machinery. It can free people's hands from greasiness, hot and cold water and detergents, and no longer worry about washing dishes and wiping dishes.

Commercially available dishwashers are generally divided into two types according to their washing working methods: tableware fixed and high-speed rotating tableware, including shower type, jet type, water flow type, ultrasonic type, etc. No matter which dishwasher you choose, you must pay attention to the following points: (1) the dishwasher must be suitable for various shapes of tableware in the home; (2) the washing and rinsing method must be high in cleanliness; (3) the tableware must be picked up and placed Convenient and reliable; (4) Operation control must be flexible and simple; (5) Operation must be smooth and low noise.

7. Electronic sterilizer

Household electronic sterilizer is a kitchen utensil that sterilizes tableware, tea sets, etc. and ensures that they are not contaminated by germs. It has the function of preventing "diseases from entering through the mouth", and is especially suitable for areas with serious environmental pollution and frequent epidemic infectious diseases.

Household electronic disinfection cabinets usually include two types: far-infrared high-temperature disinfection cabinets and ozone low-temperature disinfection cabinets. The former utilizes the characteristics of infrared heating, strong penetration, and good sterilization effect. To sterilize edible utensils, the temperature inside the cabinet is generally around 125°C and the sterilization time is 15 to 25 minutes. The ozone low-temperature sterilization cabinet uses electronic high-pressure to generate ozone gas for low-temperature sterilization of edible utensils. It has the characteristics of short disinfection time, high efficiency, and will not deform plastic tableware.

8. Water heater

When people take a shower, they cannot do without a water heater that can boil water. There are three types of water heaters that are commonly used: one is electric water heater, the other is gas water heater, and a very promising water heater - solar water heater.

The electric water heater is made of stainless steel and is shaped like a small water tank. It has a heater inside and cold water is supplied from the water pipe. Electric water heaters have automatic thermostats to ensure that the water temperature is not too high. There is also a heat-sensitive component in the circuit, which acts as a secondary insurance once the thermostat loses control. A gas water heater uses gas for heating and has a burner like a gas stove underneath it. Inside a gas water heater is a set of coiled copper pipes. Spiral water pipes have a large heating area, while copper pipes conduct heat quickly. Be careful not to let gas leak when using a gas water heater, otherwise it will cause serious pollution and even endanger life.

At present, the most promising water heater is solar water heater. It is made using the principle of black steel plate absorbing the heat energy of the sun. One of the biggest advantages of this kind of water heater is its low cost and very economical. Solar radiation energy passes through the glass cover and is absorbed by the black corrugated heat-absorbing steel plate. After the solar water heater fully absorbs heat, the temperature can reach over 100 degrees Celsius. Obviously, solar water heater is a new energy-saving water heater that is both economical and pollution-free. At present, this kind of water heater is very popular in rural areas.

Microwave heating principle

The principle of microwave heating is simply: when microwaves radiate to food, the food always contains a certain amount of water, and water is composed of polar Composed of molecules (the positive and negative charge centers of the molecules do not overlap even in the absence of an external electric field), the orientation of this polar molecule will change with the microwave field. Due to this movement of polar molecules of water in food and the interaction between adjacent molecules, a phenomenon similar to friction is produced, which increases the temperature of the water, and therefore, the temperature of the food also rises. Food heated by microwaves is also heated internally, so that the entire object is heated evenly and the temperature rises quickly. It heats food 5cm deep into the food at a frequency of 2.45 billion times per second, accelerating the movement of molecules.