Which country invented the sea freezer?

The country that invented the sea freezer was Britain.

1626, Francis Bacon, a famous American philosopher, made an experiment in which chickens were buried in the snow and did not rot for a long time. Since then, some scientists have done the same experiment. Since then, people have known that the cause of food corruption is invisible microorganisms. One way to deal with them is freezing, so it's a good idea to use ice to refrigerate food. 1873, a refrigerated ship named Norfolk was built. It transported 20 tons of frozen mutton from Melbourne, Australia to London, England. After the news spread, people came to visit one after another to see if the refrigerated ship could keep the mutton from going bad. When the hut was opened, people were disappointed-the mutton had gone bad and stinked! It turned out that when the ship set out from Melbourne, it had to cross the hot equator to reach England. The ice on the ship could not stand the heat of the equator and soon melted. Therefore, the experiment of a refrigerated ship that tried to use ice as refrigeration means failed.

Because natural ice can't achieve long-term refrigeration, people have found another way and started to study the technology of making artificial ice. 1822, the British physicist Faraday discovered such a phenomenon: gaseous carbon dioxide, ammonia and chlorine will become liquid under pressure, and the gas will be recovered after the pressure is reduced, and this process is accompanied by heat absorption and heat release. Soon, German chemist Linde made use of this phenomenon to make a refrigerator. He uses ammonia for refrigeration. Firstly, pressurizing to liquefy ammonia; Then it is sprayed from the small hole and evaporated immediately. In the process of evaporation, a lot of heat will be absorbed, thus reducing the temperature of the surrounding environment and achieving the purpose of refrigeration. Then the evaporated ammonia is recompressed by the compressor to liquefy it, and the next cycle process of absorbing heat and cooling is started again. According to this principle, 1876 built a refrigerated ship named "Rosam". A refrigerator with ammonia as refrigerant was installed on the ship, and salt water was used in the cabin to come to cooling coils. The ship was launched in Sydney Harbour, Australia, and the mutton was just loaded into the cabin, ready to set sail. Unexpectedly, the cooling system failed due to the salt water leakage in cooling coils. As a result, the salt water not only polluted the mutton, but also deteriorated quickly because of the hot weather, and the refrigerated ship experiment failed again.

However, scientists are not discouraged. On the one hand, they analyzed the reasons for improvement, on the other hand, they continued their experiments. 1879, a refrigerated ship named "Strasbourg Levin" was finally built, and once again loaded with 40 tons of beef and mutton, it set off from Sydney Port, Australia, and sailed for London Port. All the way across the hot equator, across the Indian Ocean and the Red Sea, across the Suez Canal, across the Mediterranean Sea, and finally arrived in London Harbor on February 2, 1880, which lasted several months in Wan Li. When people opened the cabin, they found that the beef and mutton were still frozen into pieces of hard meat ice and did not deteriorate at all. This is the first practical refrigerated ship in the world. Since then, the operation of refrigerated ships has been on the normal track.

In the 20th century, American refrigeration industry developed rapidly. In addition to large refrigeration equipment, a small refrigerator suitable for home use has also been developed. This is the refrigerator, which ordinary families can use to freeze food. In order to improve the refrigeration efficiency and further improve it, the refrigerant was changed to Freon, which is now the refrigerator. The principle is exactly the same as that invented by Linde.