What is the difference between a volute fan and a centrifugal fan?
Centrifugal fan cover is a volute, is to increase its static pressure head and high pressure section of the fan efficiency. After the volute centrifuge fan removed the volute, the majority of the air volume range (high pressure area) of the static pressure head is lower than the centrifugal fan with a volute
In theory, it should be no first volute centrifugal fan, after the emergence of a volute centrifugal fan. There is a spiral case centrifugal fan should be said to be a spiral case without a centrifugal fan upgrade version. But with the progress of technology, and now in a lot of applications, but also returned to the non-volute centrifugal fan, no volute centrifugal fan has become a spiral case centrifugal fan upgrade version.
Centrifugal fans include a volute bulk fan (Housed centrifugal fan) and a voluteless centrifugal fan (Unhoused centrifugal fan).
The efficiency of the blower in the high pressure zone is therefore lower than that of a centrifugal fan with a volute. And a part of the air flow range (low pressure area) of the static pressure head is higher than the spiral fan of the centrifugal fan, low pressure zone fan efficiency is also higher than the centrifugal fan with a volute. Remove the volute, the centrifugal fan of the maximum air volume has also increased.
Commonly used is a volute centrifugal fan, so the name of the "volute" was omitted. The full name of the volute without a volute is a volute-free centrifugal fan, which is also known as a plug fan or a Plenum fan on different occasions.
