| 摘要 |
A pressure washer has an inlet and an outlet, a pump assembly in fluid communication with the inlet and the outlet, and a motor which drives the pu mp assembly. A flow switch is disposed upstream of the pump assembly, and is electrically connected to the motor. Configured to be extended with a biasin g structure towards the inlet, an axially displaceable flow plunger seals the pump assembly from fluid communication with the inlet. The flow plunger is also configured to be retracted when a fluid force of a fluid from the inlet overcomes the bias of the biasing structure. When the flow plunger is retracted, the flow plunger automatically turns the pressure washer motor on.
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