What is cold quantity?

Cooling is a common name in refrigeration, refrigeration is to get lower temperature than the surrounding air, compared with the surrounding air, it has the ability to absorb heat, generally, the heat absorption capacity of low-temperature objects relative to the surrounding air temperature is called cold volume. The lower the temperature of the object is (the bigger the temperature difference between the object and the surrounding air is ). The more the quantity is, the greater the ability to absorb heat, that is, the greater the cooling.