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Clean room centrifugal blower heat transfer performance and lubrication requirements Jul 25, 2018

The clean room centrifugal blower has a large single-unit refrigeration capacity, and its volume is small and the floor space is small when the cooling capacity is the same, and its weight is 5-8 times lighter than the piston type. The clean room centrifugal blower has no reliable parts such as steam valve piston rings and no crank linkage mechanism, so it is reliable in operation, stable in operation, low in noise, simple in operation, and low in maintenance cost.

There is no friction between the working wheel and the casing of the clean room centrifugal blower. No lubrication is required during the operation, and the desired refrigerant vapor and lubricating oil are not in contact, thereby improving the heat transfer performance of the evaporator and the condenser. The cooling capacity can be adjusted economically and conveniently, and the range of adjustment is large.

In the clean room centrifugal blower, the system air volume demand changes, so the task of the compressor is to adjust the system when the system demand changes, so that the system pressure can be kept unchanged, effectively The function of the constant pressure source is controlled by the intake vane and the vent valve.

The high load limit of the clean room centrifugal blower is to limit the maximum opening of the intake vane when needed, to protect the motor, and the throttling limit is to limit the minimum opening of the intake vane and protect the compressor. The introduction of motor current in the pressure control loop is a feature of this circuit. The first function of introducing motor current is to protect the motor from overload, called high load limiting.

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