What's the difference between a cold storage and a controlled atmosphere storage?

1. Freezers and quick-frozen warehouses have different functions.

The freezer is mainly used for cold storage, so the temperature is relatively low, generally controlled between-18℃ and -25℃, while the quick-frozen freezer means that the average temperature quickly reaches -28℃, so that food can pass through the largest ice crystal generation area in a very short time, greatly reducing the ice crystals between cells. The advantage of quick-freezing warehouse is that it can reduce the loss of juice in cells during quick-freezing, so as to better keep the nutrients of quick-frozen food from losing.

2. Difference in temperature and cost between freezer and freezer.

On the one hand, it is the cost difference between the two kinds of cold storage. Under the same conditions, the temperature required for cold storage is low, so the power of refrigeration equipment is relatively high, which means that the energy consumption of cold storage is higher than that of fresh storage, so the cost of cold storage is higher than that of fresh storage; On the other hand, cold storage is mainly used for the cold storage of meat and aquatic products, so it needs a relatively low temperature compared with fresh storage. Generally, the temperature is controlled at-15/ 18, and the preservation is mainly used for the preservation of agricultural and sideline products, so the temperature can not be too high or too low, generally around 0-5.

The difference between fresh-keeping cold storage and modified atmosphere storage is roughly the same. For fresh fruits and vegetables, especially when fresh e-commerce and cold chain logistics are popular, they are rare heroes in the field of fruit and vegetable preservation.

Strictly speaking, modified atmosphere storage is a kind of fresh-keeping storage, but the technology applied to modified atmosphere storage is more advanced than ordinary fresh-keeping storage. In specific applications, modified atmosphere storage is also used to keep fruits and vegetables fresh. Its preservation principle is to prolong the storage period of fruits and vegetables by adjusting the gas content in the cold storage. In general, the shelf life of modified atmosphere storage is about 3-4 months longer than that of fresh storage. Therefore, modified atmosphere storage is an upgraded version of fresh-keeping cold storage and the crystallization of higher technology. Of course, advanced technology requires more labor, which will inevitably lead to an increase in cost, which is why the cost of modified atmosphere storage is much higher than that of ordinary fresh-keeping cold storage.