| 摘要 |
A pump unit for bubble baths comprises a centrifugal pump 11 with a central inlet 13 and a radial outlet 18 and a piping system connected to the inlet by means of an inlet opening 14 and an outlet opening 19. The pump unit also comprises elements 21, 23 for introducing air into the outlet pipe 19. The capacity of the pump can be adjusted by means of a control device comprising an air duct 21, provided with a valve, which serves for introducing air into the inlet opening 14. When the valve 27 is opened so that a large quantity of air enters the pump, both the quantity of water pumped by the pump and the outlet pressure of the pump will diminish as a result thereof. <IMAGE>
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