Abstract:
A dishwasher comprising directing means (5) for directing a washing liquid at least towards the first or the second spraying means (3, 4); said directing means (5) comprising: -an electric motor (50), a cam profile (53) and a switch (54) having a mobile part intended to come into contact with the cam profile (53); -a rotating element (51 ) comprising at least one washing liquid supply hole; said at least one hole can be placed in communication with the first or the second spraying means (3, 4); a rotation of said rotating element (51 ) determines a relative shift of said cam profile (53) and of said switch (54) in order to determine the opening/closing of the switch (54); said cam profile (53) comprises a plurality of concavities (63) at which there is an opening of the switch (54); -motor (50) rotation activation means (7); the motor (50) rotation activation means (7) are controlled by a pulse based electric signal; - an electric path (8) for electrically powering the motor (50); said electric path (8) comprising a first branch (81 ) along which said activation means (7) are arranged and a second branch (82) which by-passes the first branch (81 ) and along which the switch (54) is arranged; - control means (9) that monitor the duration of the various time intervals in which the switch (54) is closed or open.
Abstract:
A drive circuit (100) for driving a household appliance from a stand-by condition to an operating condition, said circuit comprising: an input stage (110) for generating a main signal (MS) representative of a movement of an actuation/selection element (120) of a household appliance (1), said main signal (MS) having a different sign depending on a direction of movement (D1, D2) of said actuation/selection element (120); a first comparator stage (130) for detecting said main signal (MS) when the latter has a given sign and for outputting a corresponding first control signal (CS1); a second comparator stage (140) for detecting said main signal (MD) when the latter has a sign opposite to said given sign and for outputting a corresponding second control signal (CS2); an output stage (150) configured for generating, when it receives said first control signal (CS1) and/or said second control signal (CS2), a corresponding reactivation signal (RS) for driving said household appliance (1) from a stand-by condition to an operating condition.
Abstract:
Household appliance (1) with a safety circuit, comprising at least one electrical load (L1-Ln) connected to a power mains supply, said at least one electrical load (L1-Ln) being provided with a ground connection branch (10), said household appliance (1) further comprising a safety circuit (20) provided with: a detection element (30) associated with said ground connection branch (10) and configured to detect a leakage current (I) flowing in said ground connection (10); a comparison module (40) configured to compare said leakage current (I) with a preset threshold. Said module of comparison (40) is further configured to disconnect said at least one electrical load (L1-Ln) from said power mains when the leakage current (I) turns out to be higher than said preset threshold.
Abstract:
A dishwasher comprising directing means (5) for directing a washing liquid at least towards the first or the second spraying means (3, 4); said directing means (5) comprising: -an electric motor (50), a cam profile (53) and a switch (54) having a mobile part intended to come into contact with the cam profile (53); -a rotating element (51 ) comprising at least one washing liquid supply hole; said at least one hole can be placed in communication with the first or the second spraying means (3, 4); a rotation of said rotating element (51 ) determines a relative shift of said cam profile (53) and of said switch (54) in order to determine the opening/closing of the switch (54); said cam profile (53) comprises a plurality of concavities (63) at which there is an opening of the switch (54); -motor (50) rotation activation means (7); the motor (50) rotation activation means (7) are controlled by a pulse based electric signal; - an electric path (8) for electrically powering the motor (50); said electric path (8) comprising a first branch (81 ) along which said activation means (7) are arranged and a second branch (82) which by-passes the first branch (81 ) and along which the switch (54) is arranged; - control means (9) that monitor the duration of the various time intervals in which the switch (54) is closed or open.
Abstract:
Household appliance with a safety circuit, comprising at least one electrical load connected to a power mains supply, said at least one electrical load being provided with a ground connection branch, said household appliance further comprising a safety circuit provided with: a detection element associated with said ground connection branch and configured to detect a leakage current flowing in said ground connection; a comparison module configured to compare said leakage current with a preset threshold. Said module of comparison is further configured to disconnect said at least one electrical load from said power mains when the leakage current turns out to be higher than said preset threshold.