| 摘要 |
An improved water vacuum extraction machine having a modular design allowing the detergent container to be removed when the machine is used in the vacuum mode when the detergent solution is not required. The water vacuum extraction machine includes a removable water filter to allow for the hydro filtration tank to be cleaned more easily. Further, an added filter is provided downstream of the suction motor to thereby reduce the amount of particles which are released into the environment. Specifically, the machine includes an outer casing including a bottom wall and a top wall and defining a chamber therein and a recovery tank removably positioned within the chamber. The hydro filter is disposed within the recovery tank and includes an inner tube and an outer which are concentrically arranged to define an annular space therebetween. A top end of the inner tube communicates with a hose of the vacuum to suction a return stream, including contaminants, therethrough, the outer tube being closed at its bottom and spaced axially from an open lower end of the inner tube. An upper portion of the outer tube has an outlet port and a lower portion of the outer tube has an inlet port, and the inlet and outlet ports are open to the interior of the recovery tank and to the annular space between the concentric inner and outer tubes. Therefore, liquid filling the recovery tank above the level of the water inlet port is aspirated by the return stream to cause contaminants within the return stream to be entrained by the water for primary filtration of the return flow stream as the return stream flows through the annular space and out the outlet port. The entire hydro filter is removably secured to the filtration tank. Further, the outer tube includes a baffle projecting outwardly therefrom which is adjacent the outlet port for directing the contaminated return stream back toward the water.
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