| 摘要 |
<p>The invention relates to a high pressure cleaning apparatus (10, 220) comprising an electric motor (14) and a pump (12) having at least one pump chamber (44), into which at least one piston (46, 48) that can be moved back and forth is immersed, and which is connected via an intake valve (56) to a suction line (58) and via a discharge valve (62) to a pressure line (68). The pump (12) has a first bypass line (96) in which a first overflow valve (98) is arranged, which, depending on a state quantity of a cleaning liquid flowing through the pressure line, is closed and opened automatically. The electric motor (14) can be switched on or off depending on the flow rate of the cleaning fluid flowing through the pressurized line. In order to reduce the energy consumption of the high pressure cleaning apparatus, the pump (12) has a second bypass line (160) in which a second overflow valve (128) is arranged, the closing body (146) of which can be moved manually between a closed position and an open position.</p> |
