First, the temperature of cold storage is generally below 0℃, such as 0℃,-18℃, -28℃, etc., sometimes higher than 0℃, but not much higher; The constant temperature warehouse is generally above 5℃, mostly in the twenties.

Second, the cold storage is simply refrigeration. If the temperature in the warehouse is high, the machine will start to cool down. In addition to the cooling function, the thermostat also needs to prepare heat. When the temperature is high, it will cool down, and when the temperature is low, it will heat up. The accuracy can be slightly higher, but it is not absolute.

Constant temperature storage is a kind of cold storage, but it is slightly special. High temperature storage, low temperature storage, constant temperature storage and quick freezing storage are collectively called cold storage.