What material is good for the inner container of electric kettle? Everyone usually drinks boiled water, and they all use electric kettles to boil water. Although the electric kettle is a small household appliance, it is basically found in every household and is very common in life. So what material is used for the inner container of the electric kettle?
What material is used for the inner container of electric kettle? 1 electric water heater liners mainly include stainless steel liners, enamel liners and galvanized liners.
The inner container is the most important and core component of electric water heater. The performance and quality of the inner container of electric water heater directly affect the safety performance, service performance and working life of electric water heater. Generally speaking, stainless steel liner is better than enamel liner, and enamel liner is better than galvanized liner.
Stainless steel lining
Stainless steel liner usually adopts steel plate containing titanium metal, which has high strength and high temperature resistance. Anti-corrosion characteristics, in the process of use, the performance of this liner is very stable. However, the welding of stainless steel liner is very easy to be corroded, and water leakage may occur when it is used.
Enamel lining
The enamel liner is also called "glass", "timely porcelain glaze" and "high glaze composite steel", which consists of two raw materials: porcelain layer and enamel steel plate. The enamel on the surface of the liner is a nonmetallic material, which is neither rusty nor corrosion-resistant. The gallbladder body is made of thick steel plate, which has strong compression resistance and its service life is about 5- 10 years.
Galvanized inner container
Galvanized water tank is the water tank of the first generation electric water heater. The zinc protective layer is only 0.06 mm, which is easy to rust and scale and has a short life. Now it has been gradually withdrawn from the market and replaced by hot-dip galvanized steel tanks coated with antirust resin.
Answer:
1, ceramic insulating gasket. Ceramic liner, the liner made of this material is completely harmless, without many harmful substances, such as plastic, and will not release many heavy metals, such as metal cups. However, ceramic insulation gasket is an uncommon material, which is rare in the market.
2, purple sand heat insulation liner. This material has the function of heat preservation. Some better purple sand has the function of health care and conditioning. The inner container of the purple sand cup is often equipped with a stainless steel shell, which can prolong the service life of the purple sand cup.
3. Glass thermal insulation lining. Glass insulated liner This is a relatively healthy kettle, but it is not resistant to falling. The substance in the glass is relatively stable and will not leak impurities because of boiling water. Glasses are easier to clean, but they are not easy to carry around.
4, plastic insulation liner. Plastic heat insulation gasket is a common material. The thermos cup made of this kind of liner only has the function of heat preservation, and the heat preservation time is only about 3 hours.
What material is the inner container of the electric kettle? 2 A healthy electric kettle basically meets the following requirements:
Safety of lining materials
Functional richness
usability
High quality thermostat
Safety of liner materials: The liners of electric kettles on the market can be divided into four categories: food-grade stainless steel, food-grade silica gel, carbon and glass.
The inner container is made of food grade stainless steel 304.
The advantage is that it is very cheap. Basically, we can see all stainless steel hot water kettles at home. The disadvantage is that the face value is fixed and it is not hot. Easy to scale.
Glass electric kettle
The advantage is high face value, but it is easy to break.
Food grade silica gel material
Advantages: easy to carry, durable, easy to clean, not easy to produce scale, really ordinary.
Carbon coated inner container: basically used for multi-stage temperature control electric hot water bottle.
Different materials have their own characteristics, so you can choose according to the actual situation.
1, oxygen-free copper liner
Advantages: fast heat conduction, pressure and corrosion resistance, good ductility, antibacterial and bacteriostatic, and high thermal efficiency.
Usage: Oxygen-free copper liner electric water heater is recognized by the industry as the most mature and stable water heater in line with the trend of environmental protection and health. But it is mainly suitable for hot electric water heaters, which are more common in developed areas in Europe and America.
2, stainless steel liner
Usage: Although the stainless steel liner has its own advantages, it will be corroded by chloride ions during use, resulting in water leakage at the welding place.
3, enamel liner
Advantages: non-metallic material, not easy to rust, strong compression resistance, best thermal insulation performance and long service life.
Usage: Enamel liner is a widely used electric water heater liner at present, and most manufacturers promise to replace it for more than five years, which is more practical.
What material is used for the inner container of electric kettle? 3. Processing materials.
The inner container material of electric kettle is generally 304 stainless steel-electric kettle is one of the products listed in detail in national standards, so the requirements are relatively high. As long as it is a qualified electric kettle, the inner container must be made of food-grade 304 stainless steel.
For the electric kettle shell, some have it and some don't. There is no shell, the inner container is a shell, the inner layer is in contact with water, and the outer layer is in direct contact with air. The biggest disadvantage of this electric kettle is its heat. A slightly better electric kettle will use a plastic shell. With the shell, the risk of scalding will be greatly reduced.
A slightly better electric kettle will use a plastic shell. With the shell, the risk of scalding will be greatly reduced.
Technically, you can look at the seams in the pot-the pot with seams is welded. The joint is easy to be damaged, especially the tap water with more scale is scalded. The seamless liner is integrated with pressure, so there is no weakness without gaps, and the service life is naturally longer.
Second, heat preservation and constant temperature
An electric kettle without a shell has no heat preservation function. When water is boiled in a pot, it will naturally cool down. Kettles with shells generally have better thermal insulation performance. But the insulation effect depends on the material and thickness of the shell. Some high-end electric kettles will also be sandwiched between the inner container and the outer shell, but it is of little use to me.
There is only one word difference between constant temperature and heat preservation, but the principle is much worse. Insulation depends on the shell to slow down the speed of water temperature reduction. Constant temperature depends on internal electronic components to keep the water temperature in the pot constant.
1, material safety
All of them are safe. It is best to choose food-grade stainless steel that meets the national standard GB4806.9-20 16.
There have been rumors about high manganese stainless steel for a long time. Therefore, there is no drinking water safety problem in the normal electric kettle.
But the stainless steel material is really different. 304 is more suitable for food and medical industry than 20 1. However, 304 stainless steel is generally not food grade, but food grade stainless steel that has reached the national standard GB4806.9-20 16 through special processing.
Therefore, it is best to choose the packaging of the electric kettle or the logo of GB4806.9-20 16 on the kettle body, which is the real "food-grade stainless steel". (GB 9684-2011April 19 days ago, 2065438)
2. Don't worry
Choose products with 3C certification and multi-layer liner design.
The Consumer Report analyzed the sampling data of national industrial and commercial quality supervision of electric kettle from 2065438+00 to 2065438+06, and found that the unqualified rate of Oaks and Hemisphere was high, and the unqualified items of sampling data mainly focused on grounding measures, signs and structures, as shown in the following figure.
Therefore, if you want to rest assured, the first point is the circuit safety of electric kettle products, choose reliable purchase channels (choose products with 3C certification) and well-known brands, and don't buy unknown products at roadside stalls or small shops.
The second point is to choose a kettle with multi-layer liner design, otherwise it will easily cause burns.
PConline Truth-seeking Laboratory tested the temperature rise of the electric kettle during use. The conclusion is that all the product shells with single-layer structure are over 60 degrees, and the average temperature is about 85 degrees, which is a risk of scalding! ! The products with double-layer structure are much safer, and the average temperature is about 42 degrees.
* The conclusion and chart are from PConline Truth-Seeking Laboratory. "We bought 20 mainstream electric kettles and found that 70% of them have potential safety hazards".
3. Summary
Material safety of 1: All materials are safe. It is best to choose food-grade stainless steel that meets the national standard GB4806.9-20 16+06.
2 pot safety: choose an electric kettle with double pot design.
3 Circuit safety: Choose big brands to buy in reliable channels (3C certification is guaranteed), the finer the workmanship, the better the product quality.