The good or bad of refrigerators for people s lives, and what harm refrigerators do to people

The best place for food preservation.

The scientific use of refrigerators is not harmful to people. The harm of refrigerators is mainly due to unscientific use. If food is left in the refrigerator for too long, bacteria will slowly grow and cause spoilage.

When a person consumes this food, it can cause diseases. So don't use the refrigerator as a safety box, and food should not be stored in the refrigerator for too long.

The refrigerator is basically available in every family, and its benefits are not to mention that everyone knows it, and it becomes quite easy to store some perishable food.

In addition, it is easy to drink cool drinks and beverages in summer, as well as chilled watermelon and other fruits.

But the refrigerator sometimes has some bad effects.

For example, after having a refrigerator, everyone often makes a lot of food at once when preparing food, thinking that they can put it in the refrigerator if they can't finish it.

However, some foods can easily breed bacteria when kept in the refrigerator, and people will be at risk of getting sick after eating them.

In addition, the refrigerator has a relatively large capacity, and some things will be forgotten after being put in the refrigerator, and when you think about it one day, the food will not be edible, so there is a certain degree of waste.

Benefits: It is possible to extend the storage time of certain things!

Consumption can be promoted! OK.

Disadvantage: Waste of electricity resources!

There is radiation ..

The good thing is that it's cold inside the fridge.

The downside is that it's hot outside.

It can preserve some perishable food, etc., and it can bring coolness to people (making ice cream) and: if the homework book is wet and will wrinkle after drying, you can put it in the freezer compartment of the refrigerator for a period of time, and it will be flat when you take it out.

A scientific summary of food preservation techniques.

The invention of the refrigerator in 1923.

The invention of the refrigerator has enabled human beings to have cool and fresh food. In 1923, two Swedish engineers, Platten and Mendes, made the world's first refrigerator, and since then, refrigerators have entered thousands of households and become a commonly used "home appliance companion" in people's daily life.

For thousands of years, humans have tried to keep themselves and their food cool on hot days. As early as 1000 BC, the Chinese knew how to put winter ice cubes in cellars and save them for use in summer. In the 8th century, the king of the Kingdom of Baghdad piled up snow from abroad in his summer lodge to cool down.

But it wasn't until 1834, when the 68-year-old inventor Jacob Perkins patented a patent for the compressor, that people learned how to make artificial ice. Perkins' machine works on the same principle as the household refrigerators we use today: it cools by evaporating a compressed fluid, and then recondenses it.

It's just that the material used by Perkins was ether, and today we use ammonia and Freon.

In 1923, Swedish engineers Platten and Menders built the world's first refrigerator, which used an electric motor to run a compressor. Two years later, an American company bought out the technology patent and began mass production of refrigerators. Household refrigerators have since swept the world.

According to statistics, in the United States, the penetration rate of refrigerators is quite high, and the proportion of households without refrigerators is less than 1.

Since the advent of the first batch of refrigerators, to today's "blooming everywhere", the refrigerator itself has also undergone a huge "revolution". In the early days of refrigerators, the electric compressor and food box inside were separated, and later they became one. In refrigerators, the refrigerant used at first was a toxic substance, such as ammonia or sulfuric acid, which gradually developed into a safer freon, which is still used today.

With the sharp increase in production volumes, refrigerators **began**. By 1944, about 85 percent of American households had refrigerators. Scientists are constantly innovating refrigerators, producing portable small refrigerators and developing new technologies such as sonic refrigeration to save energy.

Since the volatilization of freon tends to lead to the reduction of the ozone layer in the atmosphere, high-efficiency, freon-free refrigerators have appeared on the market.

Side-by-side refrigerator.

Advantages: This kind of side-by-side refrigerator is more suitable for use in the narrow space where there is no room for a wide refrigerator door. In general, the internal space area is relatively large, and the appearance is relatively atmospheric, which has a certain role in decorating the kitchen space in addition to practicality.

Disadvantages: However, compared with other models of refrigerators, this type of refrigerator is more suitable for energy consumption, and it is not very cost-effective for ordinary consumers.

Built-in refrigerator.

Pros: Clean, all-in-one layout, novel design, refrigerator embedded in cabinets, wooden panels around the cabinets. Width range: 36?48 inches (1 inch = cm).

Disadvantages: **High, requires special personnel to install, and the available storage space is less than other types of refrigerators.

French under freezer.

Advantages: This so-called French refrigerator is designed with a double door, with two refrigerator doors in the upper part and a freezer in the lower part, which has become the choice of more and more people, mainly reflected in the bright and fashionable appearance, the built-in capacity is larger, and it is generally equipped with an ice and water device.

Disadvantages: Need to lean over to pick up food from the freezer.

on the freezer.

Advantages: There are more refrigerators suitable for small apartment spaces, general kitchen space is relatively small, and families with limited budgets are the best choice. The performance and style of this type of refrigerator are generally relatively continuous traditional style, which occupies small space, is cheap, and has the largest storage space, which has become the biggest advantage of this type of refrigerator.

In the market, it has become the choice of many ordinary consumers. Width range: 30?

33 inches (1 inch = cm).

Disadvantages: It is often necessary to lean over to reach the storage items located in the lower refrigerator compartment and to leave some space for the wide refrigerator door.

Traditionally under the freezer refrigerator.

Advantages: Compared with the traditional refrigerator style, the refrigerator freezer compartment is generally set in the lower half. Easier access to food in the refrigerator. The width range is the same as that of the upper freezer, which is 30?33 inches (1 inch = cm).

Disadvantages: Leaning over to pick up food from the freezer and leaving some space for the wide refrigerator door.

Built-in cabinet refrigerator.

Advantages: This kind of cabinet refrigerator generally needs to reserve appropriate space when decorating the kitchen, and it can be integrated with the kitchen cabinet in the space, which is more fashionable and beautiful. There are three main forms of this type of refrigerator: freezer refrigerator, traditional freezer refrigerator and side-by-side refrigerator.

Disadvantages: Slightly protruding from the cabinet, less space than similar standard models.

A good refrigerator has a high price, and the general functions of the low price are not complete!

It should be defrosted frequently, it is not easy to clean.

Practical functions need to be expanded.

Refrigerators saved the world.

Because as we all know, the earth is getting warmer and warmer because of the greenhouse effect, the temperature is getting higher and higher, and the food is more likely to spoil outside, if there is no refrigerator, people can only cook those perishable foods, so that there will be many people who are too lazy to do it, they will not eat or rarely eat this kind of food, then some of the nutrients that are only available in this kind of food can not be consumed, and then some bad things may happen to the body of such people, and they may lose their life. Then people die earlier and earlier, productivity decreases, and fewer people have time to cook, and the vicious circle continues, and humanity is finished. So the refrigerator saved the world!

The most important function of the refrigerator is to keep fresh, meat, dairy products, flowers, industrial supplies, etc. can be stored for a long time, especially in summer, people have a great demand for frozen food, and things are also thorny to keep things fresh, which is, the emergence of refrigerators, to a large extent, has improved people's living standards; In addition, frozen storage can effectively prevent the growth of bacteria, which plays a great role in promoting food safety and human dietary health.

In industry, refrigeration technology is ...... applied to many fields@#

Give your own examples).