1. Fruits and vegetables suitable for temperatures around 0 ℃

Root, stem, and leaf vegetables are mostly cool fruits and vegetables, and the suitable storage temperature is 0-2 ℃, not lower than 0 ℃. Cabbage, spinach, cauliflower, celery, carrots, peaches, grapes, apples. When these fruits and vegetables are first purchased, do not immediately put them in the cold storage, as low temperatures can inhibit the enzyme activity of the fruits and vegetables, making it difficult for residual toxins to decompose. Therefore, these fruits and vegetables are pre cooled in the refrigeration unit warehouse before transportation. Transportation requires the use of refrigerated trucks for preservation, with a temperature controlled between 2-8 ℃.

Refrigerated container temperature

2. Fruits and vegetables suitable for temperatures around 10 ℃

Tomatoes, cucumbers, bell peppers, lychees, bitter gourds, cowpeas, pumpkins and other vegetables are generally suitable for storage at around 10 ℃; These fruits and vegetables, due to their high moisture content, may turn black, soft, and lose their flavor after prolonged refrigeration. On the way, the temperature of the refrigerated truck needs to be set at 8-15 ℃.

3. Fruits and vegetables suitable for temperatures above 10 ℃

Tropical fruits should be stored in a cool and shady place. If it is to be stored in a cold storage, it should be stored in a cooler with a higher temperature, and the storage time should not exceed two days. The suitable storage temperature for fruits and vegetables such as bananas, lemons, pumpkins, etc. is 13-15 ° C. Low temperature storage can easily cause them to turn black and rot. To prevent discoloration and spoilage, the temperature of the refrigerated truck should be adjusted to 10-20 ° C when transporting such fruits.

4. Foods that are not suitable for refrigeration

Ham should not be refrigerated because the fat in it will precipitate, causing the ham to clump or loosen. After refrigeration, chocolate tends to form white frost on the surface and lose its original flavor. Bread and other pasta should not be stored refrigerated, otherwise the straight chain part of amylopectin will gradually combine and harden, leading to aging.

If the storage temperature is higher than the appropriate temperature, the post ripening aging process will accelerate and the storage period will be shortened; If the storage temperature is lower than the appropriate temperature, cold damage and freezing damage will occur. The low-temperature critical temperature for storage varies depending on the variety. The temperature of the refrigerated container transporting this type of food needs to be adjusted to -5 ℃, which mainly depends on its properties.