What is a blood bank fridge?
Why is it important to have a blood bank fridge?
First and foremost a blood bank refrigerator is used to store blood in a healthcare facility
Principle of a blood bank refrigeration
The process of refrigeration is normally carried out in an enclosed system.
The compressor absorbs in the refrigerant of low-pressure air in the evaporator from the low-pressure end and simultaneously compresses
it into high temperature and pressure air and feeds in to the condenser.
When the heat is emitted, it is condensed into a high-pressure liquid that flows through a dry filter,
after removal of moisture and impurities it enters the evaporator through a capillary throttling liquid.
At this time as the pressure is reduced the evaporated refrigerant of low pressure air is absorbed by the compressor once more.
This process goes on in a cycle.
Principle of electrical control
The unit temperature is controlled by the temperature controller,
when the unit temperature is higher than the range controlled by the temperature controller
the compressor will be operated to refrigerate. When the unit temperature goes below the temperature controller the compressor will stop.
When the unit temperature rises again the above action will be repeated and goes round and round.
Phenomena that do not need to cause concern
- When the refrigerator works and for some time after it stops, the refrigerant in the pipe flows in cycle with a rumble
- The surface temperature of the compressor may reach 70C -80C when it works
- In rainy and damp season, the body and insulation glass unit may be condensed with dew,
which can be dried by a cloth as it doesn’t affect the normal use of the refrigerator
- When the door is opened for access to goods, the computerized temperature controller
will send acoustic-optical alarm if the alarm temperature is surpassed because of instontanem discharge of coding air from the unit
80°
