Swimming pool cleaner with backwash system
First Claim
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1. A swimming pool cleaner for filtering debris from water in a swimming pool comprising:
- a housing;
drive means for displacing the swimming pool cleaner;
a water inlet;
a water outlet;
a filter formed by a first filter chamber, a second filter chamber and at least one partition, the at least one partition separating the first and second chambers and respectively defining first and second filter enclosures,at least one non-return device placed in correspondence with the partition wall; and
a pump;
whereinsaid water inlet, water outlet, filter, at least one non-return device and pump are configured to (i) draw a first flow of water and debris from the swimming pool into the swimming pool cleaner such that the debris is retained in the first filter chamber of the filter and filtered water is discharged back into the swimming pool via the water outlet during a first operation mode of the swimming pool cleaner, and (ii) draw a second flow of water from the swimming pool into the swimming pool cleaner and direct the second flow of drawn water to displace the debris in the first filter chamber to the second filter chamber during a second operation mode of the swimming pool cleaner, the at least one non-return device being arranged such that the displaced debris cannot return from the second filter enclosure to the first filter enclosure when the swimming pool cleaner is operating in the first operation mode.
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Abstract
A swimming pool cleaner comprising a housing (1, 2), drive means (4, 41), a water inlet (11), a water outlet (12), a filter (20) and a pump (3), arranged so that, in a first operation mode of the swimming pool cleaner, the pump (3) displaces water from said inlet (11) to said outlet (12) through said filter (20), so that debris entering with the water is retained in a first part of said filter (20). The swimming pool cleaner is configured so that in a second operation mode, debris is displaced from said first part to a second part of the filter. Thus, a backwash effect is provided that prevents clogging.
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Citations
14 Claims
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1. A swimming pool cleaner for filtering debris from water in a swimming pool comprising:
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a housing; drive means for displacing the swimming pool cleaner; a water inlet; a water outlet; a filter formed by a first filter chamber, a second filter chamber and at least one partition, the at least one partition separating the first and second chambers and respectively defining first and second filter enclosures, at least one non-return device placed in correspondence with the partition wall; and a pump;
whereinsaid water inlet, water outlet, filter, at least one non-return device and pump are configured to (i) draw a first flow of water and debris from the swimming pool into the swimming pool cleaner such that the debris is retained in the first filter chamber of the filter and filtered water is discharged back into the swimming pool via the water outlet during a first operation mode of the swimming pool cleaner, and (ii) draw a second flow of water from the swimming pool into the swimming pool cleaner and direct the second flow of drawn water to displace the debris in the first filter chamber to the second filter chamber during a second operation mode of the swimming pool cleaner, the at least one non-return device being arranged such that the displaced debris cannot return from the second filter enclosure to the first filter enclosure when the swimming pool cleaner is operating in the first operation mode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification