1, preservation and refrigeration are two different concepts. Many friends are confused about preservation and refrigeration when using freezers. Refrigerator preservation only delays the degradation process of substances, and cannot fundamentally solve the problem that substances do not deteriorate. Preservation can ensure the quality of materials, that is, original ecology, freshness and original flavor. But not suitable for long-term preservation; Freezing is a process to prevent the degradation of substances and can be preserved for a long time. For merchants, it can not only avoid the trouble of slow sales, but also earn more profits through the wrong season. However, freezing causes the loss of substances, changes the quality, and the taste is different from the original taste or even changes.

2. Vegetables and fruits are stored for a long time. Because the stall shop is different from the stall shop, it saves expenses or procurement costs by purchasing a lot of goods, and it can't be sold in time after arriving at the store, which leads to the softening and yellowing of vegetables and fruits. For fresh vegetables and fruits, the fresh-keeping cabinet can keep them in the best condition through appropriate temperature, which can delay the decay process, but it still cannot be stored overnight or for a long time. Merchants are advised to supply in moderation, and it is most appropriate to distribute goods on the same day.

3. The temperature control is unreasonable. In order to save electricity, most supermarket merchants often adjust the temperature of the glass door freezer to a high level, resulting in the mineral water we bought not being cold enough and having a bad taste.

I mistakenly thought that it wouldn't break in the freezer. Many aunts put fresh fruits, vegetables and raw pasta in the refrigerator when they come back from shopping in the supermarket, and then thaw them when they eat. At that time, it was wrong. Many times, the fresh fruits and vegetables we put in are either frozen or spoiled. In fact, this is a misunderstanding of preservation. Therefore, when we use the freezer at home, we should adopt different freezing methods for different fresh fruits and vegetables, try not to store them for a long time, and eat them immediately.

5. Lack of awareness of preservation. Fruits and vegetables in different climatic zones have different temperature requirements and adaptations, and different fruits and vegetables also have great differences in heat preservation requirements. Therefore, when placing fresh goods and other items on the shelves, the ones with lower temperature requirements should be placed in the lower space as far as possible, and the ones with higher temperature requirements should be placed in the upper position. Generally speaking, the temperature below the freezer is lower than the temperature above the freezer.

6. The difference between original flavor and cold food. The original taste is the original taste and mouthfeel of the material, but due to the difference of weather temperature and the characteristics of the earth's climate zone, it needs to be conditioned by a fresh-keeping cabinet to make the taste more pure. Cold food is to change the taste of substances. Food will produce different tastes at different temperatures, and the taste will be different. Freezing allows us to enjoy different tastes of substances.