What is the physical principle of putting steamed buns in the refrigerator?

Answer: Steamed bread cannot be kept in the refrigerator for a long time, refrigeration is low temperature, slow down the reproduction of bacteria.

Steamed buns are placed in the refrigerator for the atoms of the object. Because, thermal expansion and cold contraction. When the steamed buns are placed in the refrigerator, the flour and water will shrink. So it becomes dry, and then it is taken out and steamed, and it is soft and delicious.

Reduce the temperature, delay the time of microbial production, food storage time is longer, at room temperature, microorganisms are produced rapidly, and steamed bread grows mold and deteriorates.

How does it work? It's just that the temperature is low, and the bacteria multiply slowly, so they won't be so easily eroded.

There are very few bacteria in the refrigerator.

Just let him refrigerate and preserve, which is good, and it is also very good.

The physical principle of putting steamed buns in the refrigerator is that its temperature is low, and the temperature of its bacteria is low, and I don't like Li Wen.

On a hot summer day, does an ice-cold drink keep you absolutely cool? Does a delicious cup of ice cream make you feel less hot? Nowadays, the refrigerator has become an electrical appliance that people cannot leave with.

It can help people preserve vegetables and meats, and can also provide people with cold drinks. So I don't know if you know anything about refrigerators?

A refrigerator consists of a cabinet, a refrigeration system, a control system, and accessories. In the refrigeration system, it is mainly composed of four parts: compressor, condenser, evaporator and capillary restrictor, which is a closed circulation system. The evaporator is installed above the inside of the refrigerator, and the other parts are installed on the back of the refrigerator.

The system is filled with a substance called "CF2Cl2" (international symbol R12) as a refrigerant. R12 is vaporized into gas by low-pressure liquid in the evaporator, which absorbs the heat in the refrigerator and lowers the temperature in the box. The gaseous R12 is sucked in by the compressor, which is compressed into a high-temperature and high-pressure gas by the work of the compressor, and then discharged into the condenser.

In the condenser, the R12 continuously releases heat into the surrounding space, gradually condensing into a liquid. These high-pressure liquids must flow through the capillaries and throttle and depressurize before they can slowly flow into the evaporator, where they continue to vaporize and endothermy. In this way, the refrigerator uses electric energy to do work, and with the help of the refrigerant R12, the heat around the evaporator in the box is transferred to the condenser behind the box to be released, and so on and so on, so as to achieve the purpose of refrigeration.

Put the refrigerant first, and then use the welding torch to bake When the ice plugging, if the low pressure does not rise, the refrigerant is released first, and the interface between the filter drier and the capillary tube is baked, and the refrigerant with strong pressure is easy to spray and cause an accident after the solder is melted. Especially for refrigerators using R600A refrigerant, after cutting the process tube, the capillary tube at the interface between the filter drier and the capillary should also be cut, and the compressor process tube should be energized to suck in dry air or nitrogen and R12 gas, and discharge it from the filter drier.

Poor refrigeration The pipeline leaks, which reduces the refrigerant and causes poor refrigeration effect, and the thermostat does not stop. A refrigerator with a thermostat that does not stop itself, it is ineffective to change the thermostat many times, and the lowest temperature of the evaporator in the refrigerator is only -5 when measured with a thermometer. The shutdown temperature of the thermostat hotspot -14 is not reached, and finally the evaporator leakage is detected.

The exhaust efficiency of the compressor decreases, the refrigeration oil in the refrigerator and freezer evaporator is excessive, the capillary oil is blocked, the dirty is blocked, the refrigerator door is not tightly closed, and the frost layer is too thick will cause poor refrigeration.

Rust and air leakage The length of the self-disc copper pipe is too small, which will cause poor refrigeration and high power consumption. If fluoride is added according to the theoretical value or the return pressure value of the normal machine, the temperature of the lower part of the evaporator is high and there is no frost. At this time, the refrigerant should be added, so that the low pressure rises, the evaporation temperature rises, the return pipe frosts, the current value increases, and the thermostat is not easy to stop.

Refrigerators play a great role in people's lives today, if it is broken, it is a headache, if the problem of the refrigerator at home is more serious, you should call a professional maintenance worker to repair.

1.Introduction to steamed buns.

Mantou is one of the traditional Chinese foods, made from fermented flour and yeast flour. The steamed bun has a round or long shape and a smooth surface. Because of its low cost, convenient storage, easy to carry and other characteristics, it is widely used in daily diets all over China.

2.The reason why steamed buns can't be refrigerated.

Many people habitually keep food refrigerated to extend its shelf life or keep it fresh. However, steamed bread is different from other foods, and its special production process determines that it cannot be refrigerated.

First of all, the starch in steamed bread is susceptible to low temperatures, so storing it for too long at low temperatures will cause the steamed bread to become hard and taste poor.

Secondly, refrigeration will inhibit the growth of yeast, and yeast is the main fermentation factor in steamed bread, so refrigeration may cause steamed bread to fail to ferment, and ultimately affect the taste and quality of steamed bread.

3.How to preserve steamed buns.

Although steamed bread cannot be refrigerated, there are many other ways to extend the shelf life of steamed bread, as follows:

1) Storage: Put the steamed bread in a box or fresh-keeping bag that is completely waterless, oil-free, and odorless, and put it in a ventilated and dry place to maintain the fresh taste of the steamed bread.

2) Room temperature storage: If the temperature is low in winter, the steamed bread can be stored at room temperature, and it is not recommended to use too large a box when the amount of food is small every day, which is easy to produce moisture and make the steamed bread moldy.

4.Suggestions for eating steamed buns.

To ensure the best taste of steamed bread, it is recommended to consume it within three hours. If it needs to be stored, it is recommended to change its use, such as making steamed steamed dumplings and so on, and then put it in the refrigerator.

5.Conclusion.

Food culture is an important part of Chinese culture. Mantou is one of the most popular traditional foods in China, and its unique production process determines that it cannot be refrigerated. If you need to preserve the steamed bread, you can use the filling method or store it directly at room temperature, which can maintain the fresh taste and nutritional value of the steamed bread.

It needs to be decided according to the state of the steamed bread and the estimated time of consumption:

i.Steamed buns that have not yet been steamed: must be steamed before putting them in the refrigerator. If the dough is put in the refrigerator, it will lose water, collapse and lose shape.

ii.Steamed steamed buns: First of all, they must be steamed and cooled, and steamed buns with hot air will increase the burden of refrigeration or freezing in the refrigerator, so they must be cooled before they can be stored. ii.

If the steamed or bought steamed buns are not large, it is estimated that they can be eaten in 2 or 3 days, and these steamed buns can be stored in the refrigerator and reheated when eating. ii.

If you have a lot of steamed or bought steamed buns and can't eat them all within 2 or 3 days, you need to put the excess steamed buns in a clean plastic bag and put them in the freezer to freeze. Steamed buns stored frozen can be stored for more than a month. When you need to eat, you can take it out directly, and put it directly in the steamer to heat it up and eat it without waiting for it to thaw.

Is it better to put steamed buns in the refrigerator or freezer? Fortunately, I know, let the family know as soon as possible.

Hello, it is okay to freeze and refrigerate cooked steamed buns. If it is a steamed bun that can be eaten in two or three days, it can be stored in the refrigerator and reheated when eating. If it is a steamed bun that cannot be eaten in two or three days, you can put it in a clean plastic bag and put it in the freezer for freezing.

Frozen steamed buns can be stored for more than a month, and they can be taken out and heated when eating.