| 摘要 |
<p>Pumping apparatus comprises a first pump driven by a motor 10. The first pump may comprise a first impeller 16 rotatable within a first pumping chamber 20, with the motor 10 comprising a first back-plate 13 which forms part of a boundary of the first pumping chamber 20. The motor 10 may also drive a second pump which comprises a second impeller 17 rotatable within a second pumping chamber 21, with the motor 10 comprising a second back-plate 14 which forms part of a boundary of the second pumping chamber 21. The two pumps may be located at either end of a motor shaft 15. The, or each, back-plate 13, 14 may comprise a volute scroll, and the, or each, pump may have an axial inlet and/or a radial outlet. The motor 10 may be controlled using a printed circuit board (PCB) which responds to a measured outlet flow from the, or each, pumping chamber 20, 21. The pump(s) and motor 10 may be mounted within an integral housing.</p> |
