How long does an insulated lunch box keep warm? How long can the insulated lunch box keep warm, abou

The weather is cold, the cooked meals will be cold for a while, you can easily eat hot meals in the cold weather, only the thermal insulation lunch box, so what brand of thermal insulation lunch box is good, the thermal insulation time is longer, this depends on the quality, the general thermal insulation lunch box is kept warm for two to three hours, but some thermal insulation lunch boxes can reach about six hours. If you want to keep it warm for a longer time, you need to use a more convenient electric lunch box, which can be heated at any time as long as you have a little. Let me explain to you the precautions for the use and maintenance of electric lunch boxes:

Precautions for electric lunch boxes 11. Before use, check whether the rated voltage marked on the nameplate of the body is consistent with the voltage you use. 22. Please use a power supply with grounding protection to ensure personal safety. 3. When using, the body should be placed on a stable platform and placed out of the reach of children.

44. Do not press the power switch too hard to prevent the power switch from being damaged. 5. Do not use this product on or near the surface of heat-resistant objects such as carpets, and do not place objects damaged by steam on top of this product. 6. If the body is dry, please add water to the heating plate or unplug the power supply, and do not touch the heating plate with your hands to prevent burns.

7. A large amount of steam will be generated when cooking food, and the steam will come out when the upper cover of the body is opened, so be careful of being scalded by the steam. After the food is heated, please turn off the power switch before opening the outer lid of the electric lunch box. 88. The body has the function of anti-dry burning, that is, the indicator light is off, when the use is finished, remember to turn the power switch to the off state, and unplug the power supply to ensure that the body stops working.

99. Do not immerse the body in water or let the liquid flow into the body during cleaning to avoid danger! 010. If the power cord is damaged, in order to avoid danger, it must be replaced by the manufacturer or its maintenance department or similar full-time personnel. 1111. The electric lunch box can only heat the meal, and does not have the function of cooking rice, steamed meat and other food processing and cooking!

Be clear about the characteristics of the insulated lunch box, so that it can better bring convenience to life.

It depends on what material the insulated lunch box is.

Simple identification method of thermal insulation performance: pour boiling water into the thermos cup and tighten the stopper or cup lid clockwise for 2-3 minutes and then touch the outer surface of the cup body with your hands, if the cup (pot) body has obvious heating phenomenon, especially the lower part of the cup body is heated, it means that the product has lost the vacuum degree and can not achieve a good thermal insulation effect, and the lower part of the insulated cup is always cool. Myth:

Some people use their ears to hear whether there is a sizzling sound to determine its thermal insulation performance, and the ears cannot hear whether it is vacuum.

Sealing performance identification method: after adding water to the cup (pot), tighten the cork or lid in a clockwise direction, and place the cup (pot) flat on the table, so that there should be no water seeping; The screw-in and screw-out of the cup (pot) lid and cup mouth should be flexible and there should be no gap. Fill a glass of water and turn upside down.

Four or five minutes, or a few hard shakes, can be used to verify whether there is a water leak.

The most worthwhile brand introduction of thermal lunch boxes.

The general insulated lunch box keeps warm for three hours, and the first one may reach five hours. This is determined by the quality of the insulated lunch box and the temperature of the outside. In the hot summer, the insulated lunch box will keep warm for a longer time, even more than six hours, but the food is also more likely to spoil in summer, so it is necessary to master the time of insulation.

If it is in the cold winter, the warming time of the insulated lunch box will also be shortened, so you should pay attention when using it, so that the food is not cold, and it will be more troublesome to find it again.

Hello, we all know that if the insulated lunch box loses the thermal insulation function, then it is no different from the general lunch box, that is, it is just a simple way to hold meals. In this case, when we buy an insulated lunch box, we must understand its insulated time clearly. Here's how long the insulated lunch box can last long.

A good quality insulated lunch box can generally keep warm for four to five hours, which is enough to meet the needs of ordinary people.

There will be some differences in the holding time of different brands of insulated lunch boxes. The insulated lunch box is an ordinary lunch box with an insulated shell, which is filled with foam plastic in the inner and outer layers, and then plated with metal film in the inner layer. Such a design reduces heat loss from three aspects: conduction, radiation, and convection.

Some insulated lunch boxes will also be equipped with an electric heating device between them and the shell, which can also electrically heat the meals.

In addition, the insulation time of the insulated lunch box also depends on the actual situation, and the insulated time in summer is longer than that in winter, which is easier for everyone to understand.

There is no fixed parameter for this, different manufacturers produce different products, the heat preservation time and heat preservation effect are also different, the good heat preservation time is long, and the temperature is relatively high, and the bad one is not easy to say.

Specifically, depending on the material and structure of the insulated lunch box, if it is a hollow stainless steel insulated lunch box, it is generally only a few hours, and the insulated ceramic or tempered glass glass insulated lunch box has a better thermal insulation effect, and generally has a thermal insulation effect of more than half a day.

Now the general insulated lunch box on the market can be kept warm for two or three hours, but now the quality of the insulated lunch box is getting better and better, and the thermal insulation time of a better insulated lunch box is about six hours, which is enough for office workers or students to bring food back to the company or school to eat.

There are many brands of thermos pots, domestic brands, Hals, Supor, Fuguang, Mayflower, etc.

Foreign brands, Tiger, Zojirushi, thermos, etc.

First of all, it depends on the quality of the kettle, the tightness, the temperature of the water, and it is generally okay to keep it warm for about 12 hours, until 30 degrees can be used for 24 hours.

It depends on what type of insulated lunch box, small lunch box plus insulated barrel, can keep warm for more than 10 hours, to choose ***, ** in about 300.

Pay attention to a problem when buying, write only the insulation is not warm, at most 4 hours, write the vacuum insulation, can be 10 hours, write the insulation and cold insulation, can be 24 hours.

4 to 8 hours, the material process, etc. will affect the holding time.

After it jumps, it turns to keep warm, and if you don't turn the power on, it will stay warm. After the rice is cooked, the maximum keeping time should not exceed six hours.

However, it should be kept warm for two hours, and the rice will be hard later.

It depends on what brand, what model, my house is up to 4 hours. (This is the case when the plug is unplugged).

There is a kind of non-plugging, always plugged in, the rice cooker insulation light is on, then it will always be insulated.

Generally, insulated lunch boxes are kept warm for two to three hours, but some insulated lunch boxes can reach about six hours. How long does it take to keep warm according to your own needs, there are three kinds of thermal insulation lunch boxes in the market: one is all made of plastic, and the insulation layer is foam and the like.

The second is a glass vacuum insulation lunch box similar to a hot water bottle, the thermal insulation effect is good, but it is not very safe, easy to break, and the capacity is small, there is generally no grid, it is relatively easy to clean, **General. The third kind of thermal insulation lunch box is all stainless steel, with good thermal insulation effect, large capacity, and container cleaning, which is expensive.

1. Separate meals:

Mixed storage of meals is more conducive to the reproduction and growth of bacteria, which can bring harm to our health.

2. Try not to bring green leafy vegetables:

Although green leafy vegetables are very rich in nutrients, they are prone to oxidation if they are left in a warm lunch box for too long, which not only makes the color and appearance unsightly, but also produces some nitrites. Although the nitrite content produced by the oxidation of green leafy vegetables is not high, it is better to eat as little as possible for the sake of health. The nutrients in leafy greens can be supplemented by fruits.

3. Dishes must be thoroughly fried:

This not only avoids harmful elements left behind due to undercooking, but also kills bacteria in the food by high temperatures, extending the time of safe storage. Another thing to note is that you must use freshly cooked meals to make bento boxes to avoid contamination of food by chopsticks or saliva.

Hello, this needs to look at the quality of the insulated lunch box, and the type of your meal, generally speaking, a better insulated lunch box from the morning to noon is not a problem (winter), generally more than 80 ** insulated lunch boxes are OK, pay attention to the coating and insulation layer and the spacing between the shell.

<>The average quality of the insulated lunch box can protect the high temperature for three hours, and some of the better quality of the insulated lunch box can usually keep the temperature for about five hours. The holding time of the insulated lunch box has a great relationship with the outside temperature and the quality of the insulated lunch box. The material of the insulated lunch box is different, and the performance will be different.

Although the insulated lunch box can be kept warm, it is not recommended to put food in the insulated lunch box for too long, because the temperature is generally high, and the food will deteriorate easily, and the food in the insulated lunch box is the same.