EP0146719A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Laundry washing machine
Assignee: Industrie Zanussi SpA
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Filing: 1984-10-24
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Granted: —
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Expires: 2004-10-24
Abstract
Abstract A laundry washing machine comprising a washing tub (6), a washing drum (7) for containing the laundry, a collector (21) for collecting the washing liquid, and a recirculation pump (26) connected to said collector (21) and to said tub (6) for recirculating the washing liquid to said tub (6) so as to spray it onto the laundry. Said collector (21) accommodates at least one heating element (23) and a thermostatic sensor (24) for heating the washing liquid and for thermostatically controlling the temperature thereof, respectively. The machine is additionally provided with pressostats (49, 50, 63) for carrying out "intense" and "gentle" laundering programs for washign the laundry in a conventional manner, and with further pressostats (46, 47, 48) for carrying out "intense" laundering programs at reduced filling levels of the washing liquid within said tub (6) by repeatedly recirculating the liquid to said tub (6).
Inventors
- 👤 Piero Babuin
- 👤 Giuseppe Frucco
- 👤 Piero Durazzani
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 21:53
CPC Classifications
D; D06; D06F; D06F23/00; D06F23/02; D06F39/00; D06F39/08; D06F39/083; D06F39/04
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
226 words
A laundry washing machine comprising a washing tub, a drum rotatably mounted in said tub, a washing liquid collector disposed at a position below said tub and communicating therewith, and an electric recirchulation pump the inlet and outlet of which are connected respectively to said collector and said tub for repeatedly recirculating the washing liquid from said collector to said tub, said electric pump being connected to the electric circuit of the machine which is additionally provided with means for heating the washing liquid and means for controlling respectively the filling level of said tub and the temperature to which the washign liquid is heated, characterized in that said filling level control means comprise a first group (46, 47, 48) and a second group (49, 50) of pressostats or similar level control elements calibrated in such a manner that the pressostats of said first group (46, 47, 48) are effective to establish filling levels that are lower than those established by the second group (49, 50), and in that there are provided actuating means (56, 84; 57; 58, 93; 62) operable to activate said heating means (23) and said temperature control means (24) in series selectively with the respective pressostats of said first group (46, 47, 48) in parallel with said electric recirculation pump (90) or with the respective pressostats of said second group (49, 50).
Claim 2
Dependent Claim
226 words
A laundry washing machine comprising a washing tub, a drum rotatably mounted in said tub, a washing liquid collector disposed at a position below said tub and communicating therewith, and an electric recirchulation pump the inlet and outlet of which are connected respectively to said collector and said tub for repeatedly recirculating the washing liquid from said collector to said tub, said electric pump being connected to the electric circuit of the machine which is additionally provided with means for heating the washing liquid and means for controlling respectively the filling level of said tub and the temperature to which the washign liquid is heated, characterized in that said filling level control means comprise a first group (46, 47, 48) and a second group (49, 50) of pressostats or similar level control elements calibrated in such a manner that the pressostats of said first group (46, 47, 48) are effective to establish filling levels that are lower than those established by the second group (49, 50), and in that there are provided actuating means (56, 84; 57; 58, 93; 62) operable to activate said heating means (23) and said temperature control means (24) in series selectively with the respective pressostats of said first group (46, 47, 48) in parallel with said electric recirculation pump (90) or with the respective pressostats of said second group (49, 50).
Claim 3
Dependent Claim
155 words
A laundry washing machine according to claim 1, characterized in that said actuating means comprise first (56, 57, 58) and second (62) switch means associated respectively with the pressostats of said first (46, 47, 48) and said second group (49, 50), said first switch means (56, 57, 58) being additionally associated with said electric recirculation pump (90) via respective electric contact means (84, 93) and adapted to be actuated from a first operative position, in which said first switch means (56, 57, 58) are connected in series with each other and to said second switch means (62), while said contact means (84, 93) maintain said electric pump (90) in its deenergized state, to a second operative position, in which said first switch means (56, 57, 58) are connected in series to the respective pressostats of said first group (46, 47, 48) and said electric pump (90) is energized via the respective contact means (84, 93).
Claim 4
Dependent Claim
41 words
A laundry washing machine according to claim 2, characterized in that said second switch means (62) is adapted to be actuated from a first to a second operative position for selectively activating the respective pressostats of said second group (49, 50).
Claim 5
Dependent Claim
108 words
A laundry washing machine according to any of the preceding claims, additionally comprising at least one motor for driving said drum provided with respective windings for the high centrifugation speed and for the lower washing speed, the latter one being adapted to be intermittently energized for rotation in opposite directions by means of an inverter switch, characterized in that the energization of said windigns (74, 80) can also be accomplished via a further inverter switch (83) adapted to be connected to said one inverter switch (77) and to be activated through contact means (82) associated with a ingle one (56) of said first switch means (56, 57, 58).
Claim 6
Dependent Claim
23 words
A laundry washing machine according to claim 4, characterized in that said motor (14) is adapted to contemporaneously drive said recirculation pump (26).
Claim 7
Dependent Claim
44 words
A laundry washing machine according to claim 1, characterized in that said heater means (23) and said temperature control means (24) are accommodated in said collector (21) together with at least one filtering element (22) dispcsed within the recirculation path of the washing liquid.
Claim 8
Dependent Claim
99 words
A laundry washing machine according to claim 1, in which said tub is supported by a substantially cruciform bracket provided with a hub portion for mounting therein the drive shaft of said dium, characterized in that said hub member (11) is formed with an interior chamber (29) communicating via a conduit (28) with the outlet (27) of said electric recirculation pump ( 26 ), said chamber (29) communicating with the interior of said drum (7) via axially extending bores (30, 32) foremd in said shaft (8) and via a number of conduits (33, 34) forced with additional perforations (37).
Claim 9
Dependent Claim
25 words
A laundry washign machine according to any of the preceding claims, substantially as described with reference to the accompanying drawings and for the stated purposes.
References Cited (Backward Citations)
No citation records indexed.
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