The main reason is the limitation of refrigeration mode of refrigerator.
Household refrigerators have been kept fresh at low temperature by refrigeration for nearly a hundred years, and the fresh-keeping method is single, so it is impossible to accurately store ingredients. Keeping dry goods in the refrigerator has become a "blank" in the industry for a hundred years. However, among the 1258 kinds of ingredients used by human daily, dry food accounts for about 63.6%, and the humidity suitable for fresh-keeping environment should be controlled at about 45% low humidity to avoid moisture regain. Vegetables account for 36.4%. Because of the high water content, the most suitable humidity for fresh-keeping should be controlled at 90%-95%, and air circulation should be ensured to avoid rot and deterioration due to high humidity.
Today, this "blank" has finally been filled. The birth of Haier refrigerator dry and wet storage technology has become the most revolutionary technology in the industry. After three years of research and development and thousands of experiments, Haier refrigerator team finally successfully developed HCS ecological plant film for moisturizing and frost-free technology for keeping dry corridors.
HCS eco-plant membrane can intelligently sense environmental humidity, reduce pore size to inhibit moisture permeability at low humidity, prevent food from dehydration and decay, expand pore size to accelerate moisture permeability at high humidity, prevent food from condensation and decay, keep the humidity at about 90%-95% all the time, and ensure "wet but not rotten". Frost-free technology in arid areas uses the principle of air pressure. The sensor built in the refrigerator can monitor the air humidity at any time and keep the air humidity at about 45%. Once the humidity exceeds 45%, the sensor will be triggered. The dedicated air path will supply air to dry areas, reduce the relative humidity and ensure "dry but not dry". Through the application of two industry-leading technologies, Haier refrigerator finally realized dry and wet storage for the first time in the industry.
It is understood that the dry and wet storage preservation technology is unique to Haier, and has applied for 23 domestic patents and 23 international patents 1 1. As a result, Haier has become the only brand in the industry that can provide consumers with the most scientific food preservation scheme and lead the technological innovation trend of the whole industry.