laboratory ultra-low temperature refrigerators precautions

The samples stored in laboratories are complex and varied, including tissue samples and blood samples. Of course, a DNA sample is essential. The cryopreservation of these samples, which maintain the stability of performance for a long time, is a key point for forensic identification and research. Therefore, how to better use the ultra-low temperature refrigerator in the laboratory and the precautions in the use process have become issues that the experimenter must pay attention to.

 

First of all, when the ultra-low temperature refrigerator is in use, if there is a power failure, the power switch behind the refrigerator must be turned off. After the normal power supply is restored, first turn on the power switch behind the refrigerator;
 

Secondly, heat dissipation is very important for refrigerators. Maintain indoor ventilation and a good cooling environment. The ambient temperature should not exceed 35 degrees. Otherwise, the refrigerator will alarm and indicate that the condenser is overheated, which will seriously affect the cooling effect, or even fail to cool;

 

In addition, please note that the samples that need to be taken frequently should be placed on the upper two floors, the samples that need to be stored for a long time, and the samples that do not need to be taken frequently should be placed on the lower two floors to ensure that the air-conditioning will not be lost too much when the door is opened, and the temperature will not be too high. will rise too fast;

 

In addition, it should be noted that the filter must be cleaned once a month (can be washed with clean water, and finally dried and reset). Use a brush to clean the dust on the internal condenser every two months to ensure good heat dissipation;

 

Finally, you can usually wipe the refrigerator door seal and frost on the door with a clean, soft cloth; do not thaw easily. Be sure to defrost only to cut off the power of the refrigerator, do not open the door temporarily. When the ice and frost begin to melt, you must place clean, absorbent papers and cloths on each layer of the refrigerator to absorb and wipe the water.

 

The above are the problems and precautions that may be encountered when using traditional ultra-low temperature refrigerators.

 

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