When it comes to keeping food fresh, I believe most people will immediately think of the refrigerator, the "guardian" that protects the safety of food day and night. However, with the increase in the types of food ingredients, more and more people have discovered that although the refrigerator can create a low-temperature environment, the preservation effect is not satisfactory, and various problems such as rot, discoloration, and odor are coming one after another. As a result, manufacturers have launched vacuum preservation refrigerators one after another. So is the preservation effect really better than that of ordinary refrigerators? Let's take a look together.
In low-temperature environments, some enzymes in food can still maintain high activity, thereby accelerating the oxidation and deterioration of food materials, resulting in the loss of nutrients. Vacuum preservation is to preserve food in a vacuum environment to extend the storage time of food. The refrigerator maintains the vacuum environment at a negative pressure of about -220mbar (hobar) and the air pressure of the environment at about 0.8 atmospheres. The oxygen content in the "box" is extremely scarce, effectively inhibiting the oxidation of active enzymes in the food, and at the same time, it can It does not destroy the cell wall and maintains the activity of food cells. In a vacuum environment, oxygen is thin, which greatly delays the oxidation process of food. At the same time, the ripening gas emitted by fruits and vegetables is also greatly reduced, which can further delay food spoilage. The food stored in a vacuum crisper box is better preserved than food under normal preservation conditions in terms of color, aroma and moisture, and the vitamins and other nutrients contained in the food are better preserved. The vacuum preservation effect of fruits, vegetables, meat and fish is particularly obvious.
The many benefits of vacuum preservation can be clearly seen from the comparison of the above pictures.
The current brands of vacuum refrigerators include: Hitachi, Hisense, etc.
It is not difficult to see from the above pictures, or it can be understood that the vacuum refrigerator is an additional compartment processed by a vacuum pump on the basis of the original refrigerator.
Vacuum refrigerators can be said to be a dark horse in the field of refrigerators, and they are definitely the trend of future development. As more and more people have higher and higher requirements for the quality of life, the quality of food is also the trend for people. The object of attention, then vacuum refrigerators will definitely enter thousands of households