There are many theories about the invention of refrigerator, such as: 19 13, which was born in Chicago, USA, Domelre was the first one. It is widely said that Swedish engineers Balser von Plantan and Karl Mont took the lead in making the first refrigerator and sold the patent right to the American company Ronghua Company. However, they invented the refrigerator in 192 1, 1923, 1926 respectively.
In the final analysis, the refrigerator is mainly used to preserve food and protect the nutrition in food. At present, consumers have higher and higher requirements for the preservation function of refrigerators: long preservation time, no loss of nutrients, no odor between partitions, no odor in refrigerators, etc. These have become the most basic requirements for buying a refrigerator. In recent years, various refrigerator brands are committed to improving the preservation effect. As the saying goes, "every village has its own ingenious ways": double circulation, -7℃, reducing the temperature difference ... but there is only one purpose-preservation or preservation!
LG:P207 1BCQ
Main preservation methods: integrated circulation to avoid temperature difference.
The so-called "integrated cycle mode" refers to the refrigeration mode in which the temperature is controlled by evaporator, compressor and control box. The evaporator cools the freezer and then the cold air in the freezer flows to the freezer. There is a control box in the freezer, and the control box can decide whether to send cold air according to the temperature in the freezer. The product also adopts three-dimensional circulation refrigeration, and its air supply outlet is arranged on the side wall of the refrigerator. This design prevents the large container in the refrigerator from blocking the cold air sent by the air outlet on the back wall, causing the temperature difference between the front and back, and ensures the coolness of the front bar.
According to the sales staff of Dazhong Electric, the cost of this product's brushed panel is smaller than that of titanium alloy and mirror, and the price of the mirror with the same volume is about 10,000 yuan higher. With the same product performance, this may be another important factor for consumers to choose it.
Samsung: RS2 1NLTR
Main preservation method: double-cycle refrigeration.
After the clerk's explanation, the author understands that this double-cycle refrigeration mode is superior to the ordinary mode. Ordinary single-cycle refrigerator seems that refrigeration and freezing are separated, but in fact they are connected. The temperature of the freezer is brought by the freezer. If you open the door of the freezer, the cold air in the freezer will flow out. This recycling method not only consumes electricity, but also stinks easily, and sometimes the smell of raw meat in the freezer will also appear in the freezer. The double-cycle refrigeration refrigerator of the invention is provided with a compressor, and the refrigerating chamber and the freezing chamber are respectively provided with a set of independent evaporators for refrigeration, so that the heat preservation effect is good, there is no peculiar smell, and electricity is saved. In order to reduce the temperature difference as much as possible, each floor of the cold storage room is provided with an air outlet and a three-dimensional cold flow, which reduces the temperature difference and improves the preservation effect compared with the air supply mode of the upper air outlet.
Haier: BCD-252WBCS
Main preservation methods: The concept of -7℃ is aimed at meat.
There is a variable temperature chamber in the middle of Haier's refrigerator, and the temperature can be adjusted arbitrarily from-18℃ to 10℃. Users can turn this mobile space into a cold room or a freezing room as needed. And its unique concept -7℃ is the best temperature for storing meat. In the environment below -7℃, the cell wall will be punctured, and water and nutrients will be lost endlessly. Frozen meat taken from the freezer of ordinary refrigerator is blood after thawing, which is the evidence that the cell wall is punctured and nutrition is lost. The frozen meat taken out at -7℃ is not only soft and easy to cut, but also does not bleed after thawing, and its cell wall is intact and its nutrition is complete.
Siemens: KK28F76
Main preservation methods: 0℃ is the best preservation method for fruits and vegetables.
Professionals from Siemens manufacturers said that how to make the fresh-keeping room have a relatively stable and independent temperature environment very close to 0℃, so that food can be preserved for a long time without freezing, which is a technical problem. -7℃ is the best environment for preserving meat, while 0℃ is a wonderful temperature for preserving vegetables and fruits, which makes water and nutrition "a lot". The 0℃ fresh-keeping room of Siemens refrigerator is divided into two areas, the temperature is close to 0℃, but the humidity is different: the meat storage area above can store meat for 7- 10 days; The fruit and vegetable storage area below can store 15 days of fruits and vegetables.