| 摘要 |
The present invention relates to a vacuum-actuated device for receiving a central vacuum-cleaning hose, using the building's own pipes and solving an unsolved problem in centralized vacuum cleaning: the storage of the hose and respective cleaning brushes. The hose is introduced inside a sleeve (Fig. 1.6). This sleeves forms the final section of the pipe, thus also being located embedded in the walls or floors (Fig. 1.6). The metal tip (Fig. 1.2) of the handle of the hose to be fitted in its support (Fig. 1.5) actuates an "end-of- operation" microswitch (Fig. 1.7), which disconnects the vacuum cleaner. When the sleeve is removed from the support (Fig. 1.5), the "end-of-operation" switch (Fig. 1.7) connects up the vacuum cleaner, injecting air inside the sleeve. Covering the tip of the hose with the hand, the air expels it from inside the sleeve via the opening (Fig. 2). The end part of the hose abuts against the jamb, being immobilized. As soon as the vacuum cleaner starts up, the motorized/time-based system rotates the choke valve (Fig. 3.5) until it is in a position to allow the flow of 1 to 2 and from 3 to 4 (Fig. 3). In this position, the existing vacuum-cleaner vacuum passes through the sleeve and then via the hose. The cleaning operation completed, the mechanical withdrawal mechanism is actuated (Fig. 2). The tip of the hose is covered over with the hand and, through vacuum action, the hose is sucked inside the sleeve via the opening, only the tip remaining visible. With the sleeve fitted onto its support, the microswitch (Fig. 1.7) disconnects the vacuum cleaner and connects the four-way valve (Fig. 3), turning the choke valve (Fig. 3.5) to the rest position. <IMAGE>
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