| 摘要 |
The invention relates to a high-pressure cleaning device (10) having a high-pressure pump (16) that comprises a suction chamber (50), at least one pump chamber (52) which is arranged downstream thereof and in which liquid is pressurised, and a pressure chamber (56) which is arranged downstream of said pump chamber (52). According to the invention, in order to obtain such a high-pressure cleaning device which allows a more reliable operation, said high-pressure pump (16) comprises a return line (92) by means of which the pressure chamber (56) is fluidically connected to the suction chamber (50), as well as a valve unit (102) by means of which a free cross-sectional area of the return line (92) can be modified; said high-pressure cleaning device (10) comprises a drive unit (116) associated with the valve unit (102), a control unit (76) that is coupled to said drive unit (116), and a pressure sensor (138) which is coupled to said control unit (76) and by means of which a liquid pressure on the pressure side of the pump chamber (52) can be detected; and the liquid pressure can be regulated, depending on the signal of said pressure sensor (138), to a predetermined or predefinable liquid pressure by altering the free cross-sectional area of said return line (92). |
