Diffuser
AssigneeDyson Technology Limited
InventorMark Andrew Johnson
Life of this patent
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Abstract
A diffuser that includes a plurality of radial vanes having a blade count of between 15 and 20, a solidity of between 0.6 and 0.8, and a radius ratio of vane inlet to impeller outlet of less than 1.5. Additionally, a compressor that incorporates the diffuser.
Claims14
A centrifugal compressor comprising an impeller and a diffuser, wherein the compressor operates between a lower flow rate and an upper flow rate, fluid exits the impeller at a first flow angle at the lower flow rate and at a second flow angle at the upper flow rate, the difference between the first flow angle and the second flow angle is around 20 degrees, and the diffuser comprises a plurality of radial vanes having a blade count of between 15 and 20, a solidity of between 0.6 and 0.8, and a radius ratio of vane inlet to impeller outlet of less than 1.5 so as to provide positive stall-free pressure recovery between the lower flow rate and the upper flow rate.
A vacuum cleaner comprising a centrifugal compressor comprising an impeller and a diffuser, wherein the compressor operates between a lower flow rate and an upper flow rate, fluid exits the impeller at a first flow angle at the lower flow rate and at a second flow angle at the upper flow rate, the difference between the first flow angle and the second flow angle is around 20 degrees, and the diffuser comprises a plurality of radial vanes having a blade count of between 15 and 20, a solidity of between 0.6 and 0.8, a radius ratio of vane inlet to impeller outlet of less than 1.5 so as to provide positive stall-free pressure recovery between the lower flow rate and the upper flow rate.
Dependencies are inferred from the claim text.