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Why is There Frost Phenomenon in the Low Temperature Chiller Circulator?

Many low temperature chiller circulators will frost when they are used, but there is no frost phenomenon in low temperature chiller circulators. So, what's the matter? Is it related to refrigeration?

First of all, why does the low temperature chiller circulator frost? To find out why there is no frost in the low temperature chiller circulator, it's better to see why the the low temperature chiller circulator frosts first. Frost is a white crystalline substance of water vapor. When water vapor suddenly encounters a very low temperature object, it will condense frost on its surface.

When the air in the the low temperature chiller circulator meets the inner wall of the the low temperature chiller circulator with lower temperature, it will form frost on its surface. This is the basic reason for the frost in the the low temperature chiller circulator. The frosting of the the low temperature chiller circulator will affect the efficiency of heat exchange, resulting in the decrease of refrigeration capacity, which requires manual removal by users.

Knowing why the cold water cooler circulator frosts, then why not the wind-cooled frost? Is it the opposite? The principle of air-cooled ultra-low temperature chiller circulator is to use air to refrigerate. High temperature air flows through the built-in evaporator. Because of the high air temperature and the low evaporator temperature, the air temperature will be reduced by the direct heat exchange between the two.

At the same time, the cold air is blown into the ultra-low temperature water cooler circulator. The air-cooled ultra-low temperature water cooler circulator reduces the temperature of the ultra-low temperature water cooler circulator through this continuous circulation mode. However, there is always water vapor in the air. When water vapor is cooled, it will condense. So as long as there is heat exchange in the cryogenic water cooler circulator, frost will form. So where did the frost go?

In fact, the air-cooled ultra-low temperature water cooler circulator is not frost-free, but frost condensed on the evaporator. Because it is inside the cryogenic water cooler circulator, we can't see it directly when we open the door of the cryogenic water cooler circulator, so it is called frost-free.
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