Ultra-low temperature freezers are primarily used for the long-term, low-temperature storage of biological samples, chemical reagents, vaccines, and pharmaceuticals, ensuring that sensitive substances maintain their stability and activity at extremely low temperatures.

Ultra-low temperature refrigerator that has been in operation for an extended period often develops various issues, such as a decline in cooling performance. In some cases, the freezer may fail to achieve sufficient cooling; when this occurs, one should inspect the frost accumulation on the surface of the evaporator to determine whether the problem stems from frequent opening of the freezer door or improper placement. Ideally, an ultra-low temperature freezer should be positioned at a certain height above the floor and kept at an appropriate distance from the walls to prevent heat transfer through the floor or wall surfaces.

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