Patents by Inventor Francesco CAVARRETTA
Francesco CAVARRETTA has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11377779Abstract: A method is provided for controlling a drying cycle of a laundry dryer having a laundry drum and an air stream fan for circulating drying air through said laundry drum. The method includes the steps of: starting a drying cycle (14); performing the drying cycle (16); detecting an electric resistance and/or conductivity of the laundry during the drying cycle (16) for estimating a dryness level of the laundry; comparing the electric resistance and/or conductivity of the laundry with an end cycle condition (20; 28, 30; 36); and finishing the drying cycle (16), if the end cycle condition (20; 28, 30; 36) is fulfilled. The end cycle condition (20; 28, 30; 36) depends on the rotation speed (SD) of the laundry drum and/or on the rotation speed (SF) of the air stream fan.Type: GrantFiled: November 20, 2013Date of Patent: July 5, 2022Inventors: Francesco Cavarretta, Elena Pesavento, Maurizio Ugel
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Publication number: 20220056630Abstract: A laundry dryer including: a drum, a motor to rotate the drum, a casing supporting the drum and including a rear wall and a front wall, a basement having first, second, third and fourth quarters with the first and third quarters on one side of a plane perpendicular to the basement plane and parallel to the drum axis, and the second and fourth quarters on an opposite side of the plane, a process air conduit in fluid communication with the drum and including a basement process air conduit located in the basement, and a heat pump circuit including a compressor, and first and second heat exchangers . The first and second heat exchangers are in the basement process air conduit mainly within third and fourth quarters, and the motor and compressor are mainly in, respectively, in the first and second quarters.Type: ApplicationFiled: December 21, 2018Publication date: February 24, 2022Applicant: Electrolux Appliances AktiebolagInventors: Francesco Cavarretta, Rudy Dal Molin, Davide Camata, Francesco Lucchini, Sergio Pillot
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Publication number: 20220056629Abstract: A laundry dryer having a drum, a casing supporting the drum and including a basement defining a basement plane, a basement process air conduit located in the basement and extending within the basement for a given length and having a basement air conduit width, and a heat pump having a first heat exchanger where refrigerant is cooled off and the process air is heated up, and a second heat exchanger where refrigerant is heated up and the process air is cooled off. The first heat and second heat exchangers are in the basement process air conduit to perform heat exchange between said refrigerant flowing in said heat pump circuit and said process air. The width of the basement air conduit along a first portion of its extension in the basement is wider than 50% of the width of the basement.Type: ApplicationFiled: December 21, 2018Publication date: February 24, 2022Applicant: Electrolux Appliances AktiebolagInventors: Francesco Cavarretta, Rudy Dal Molin, Davide Camata, Francesco Lucchini, Sergio Pillot
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Patent number: 11076742Abstract: A method for obtaining information about a load of articles to be cleaned in a dishwasher is provided. The method may include stopping a pump from pumping liquid through a spraying system of the dishwasher at a point of time; recording a pressure signal in a sump of the dishwasher from the point of time the pump was stopped; measuring a time period, said time period being measured from the point of time the pump stopped until the pressure signal is essentially stable; and comparing the time period with reference values for obtaining information about the load in the dishwasher. A corresponding dishwasher, computer program, and computer program product may be provided.Type: GrantFiled: June 27, 2014Date of Patent: August 3, 2021Inventors: Maurizio Ugel, Giuseppe Dreossi, Francesco Cavarretta
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Patent number: 10351989Abstract: A laundry drying appliance having a cabinet, a treatment chamber inside the cabinet, a drying air recirculation path for conveying air into/out from the treatment chamber, a drying air propeller driven by a drying air propeller motor for causing the drying air to recirculate along the recirculation path, a drying air moisture condensing and heating system the drying air recirculation path for dehydrating the moisture-laden drying air leaving the treatment chamber and heating the dehydrated drying air before it re-enters into the treatment chamber, a laundry drying cycle selector for selecting one out of a number of default laundry drying cycles, a control unit to control the machine operation by operating the drying propeller at a default average speed corresponding to the selected drying cycle, and a command input operable by the user to change an average working speed of the drying air propeller.Type: GrantFiled: July 9, 2013Date of Patent: July 16, 2019Assignee: Electrolux Appliances AktiebolagInventors: Alberto Bison, Francesco Cavarretta, Maurizio Ugel, Massimiliano Vignocchi
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Patent number: 10294605Abstract: A heat pump laundry dryer or a heat pump washing machine having a drying function, includes a control unit controlling an operation of the laundry treatment apparatus. A laundry treatment chamber treats laundry using process air circulated in a process air circuit. A heat pump system has a refrigerant loop in which refrigerant fluid is circulated through a first and a second heat exchanger. A compressor circulates the refrigerant fluid through the refrigerant loop, and a cooling fan unit cools the compressor. During the operation, a conveyance capacity of the cooling fan unit is varied. A detector unit detects an operation parameter indicating a state of at least one electronic board. A method of operation includes operating the cooling fan unit based upon the electronic board operation parameter, and controlling the compressor operation output based upon the electronic board operation parameter, wherein the compressor is a variable speed compressor.Type: GrantFiled: November 14, 2013Date of Patent: May 21, 2019Assignee: ELECTROLUX HOME PRODUCTS CORPORATION N.V.Inventors: Francesco Cavarretta, Roberto Ragogna, Maura Pasquotti, Stefano Zandona′, Elena Pesavento, Christian Montebello
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Patent number: 9758921Abstract: A method is provided for controlling a laundry dryer including a fan motor (26) for driving a drying air stream fan (18) with a variable speed (vf) and a drum motor (28) for driving a laundry drum (12). The method comprises the steps of setting a predetermined course for the speed (vd) of the drum motor (28), maintaining the speed (vd) of the drum motor (28) according to the predetermined course for the speed (vd) of said drum motor (28), detecting a power (Pd) or a current absorbed by the drum motor (28), and controlling the speed (vf) of the fan motor (26) on the basis of the absorbed power (Pd) or current of the drum motor (28). The speed (vf) of the fan motor (26) increases with a decreasing absorbed power (Pd) or current of the drum motor (28) and/or the speed (vf) of the fan motor (26) decreases with an increasing absorbed power (Pd) or current of the drum motor (28).Type: GrantFiled: November 18, 2013Date of Patent: September 12, 2017Assignee: Electrolux Home Products Corporation N.V.Inventors: Alberto Bison, Francesco Cavarretta, Maurizio Ugel, Massimiliano Vignocchi
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Patent number: 9695544Abstract: A laundry dryer is provided with a modular air recirculation subassembly fitted beneath a rotatable drum of the dryer. The subassembly has an air recirculation passage provided between an air supply passage and an air exhaust passage of the dryer. The air recirculation subassembly further has a flow directing flap at the juncture of the air inlet passage and the air recirculation passage to direct the recirculation air flow toward a heater and away from an inlet end of the air supply passage. The air recirculation subassembly may include a filter positioned across the air recirculation passage upstream of the heater, which filter is removable through the air exhaust passage. The subassembly may further include a heat exchanger to transfer heat from the warmer air exiting the exhaust passage to the cooler air entering the air supply passage, and a recirculation air flow regulating flap.Type: GrantFiled: April 2, 2012Date of Patent: July 4, 2017Assignee: Electrolux Home Products Corporation, N.V.Inventors: Francesco Cavarretta, Massimiliano Vignocchi, Maurizio Ugel, Alberto Bison
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Patent number: 9695547Abstract: A method is provided for operating a laundry dryer having a rotatable drum for accommodating clothes to be dried and an apparatus for circulating drying air through the drum. The method comprises the steps of performing a drying cycle selected by a user, wherein the drying cycle comprises predetermined drum movements over time depending on the cycle selected, detecting values indicative of the temperature of the drying air exiting the drum, based on said detected values, determining that the clothes inside the drum are in tangling conditions and starting an untangling operation for untying the clothes inside the drum. The untangling operation comprises modification of the predetermined drum movements.Type: GrantFiled: June 26, 2012Date of Patent: July 4, 2017Assignee: Electrolux Home Products Corporation N.V.Inventors: Alberto Bison, Francesco Cavarretta, Maurizio Ugel
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Publication number: 20170119232Abstract: A method for obtaining information about a load of articles to be cleaned in a dishwasher is provided. The method may include stopping a pump from pumping liquid through a spraying system of the dishwasher at a point of time; recording a pressure signal in a sump of the dishwasher from the point of time the pump was stopped; measuring a time period, said time period being measured from the point of time the pump stopped until the pressure signal is essentially stable; and comparing the time period with reference values for obtaining information about the load in the dishwasher. A corresponding dishwasher, computer program, and computer program product may be provided.Type: ApplicationFiled: June 27, 2014Publication date: May 4, 2017Inventors: Maurizio UGEL, Giuseppe DREOSSI, Francesco CAVARRETTA
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Patent number: 9534340Abstract: A method is provided for controlling a laundry dryer including a laundry drum (12) with a variable drum rotation speed (vd) and a drying air stream fan (18) with a variable fan rotation speed (vf). The method includes the steps of setting a course of the drum rotation speed (vd) or a course of a drum motor power (Pd) of the laundry drum (12), and setting a fan rotation speed (vf) and/or a fan motor power (Pf) of the drying air stream fan (18) on the basis of the drum rotation speed (vd) and/or the drum motor power (Pd) of the laundry drum (12). The fan rotation speed (vf) and/or the fan motor power (Pf) of the drying air stream fan (18) is decreased with an increasing drum rotation speed (vd) and/or increasing drum motor power (Pd) of the laundry drum (12). The fan rotation speed (vf) and/or the fan motor power (Pf) of the drying air stream fan (18) is increased with a decreasing drum rotation speed (vd) and/or decreasing drum motor power (Pd) of the laundry drum (12).Type: GrantFiled: November 21, 2013Date of Patent: January 3, 2017Assignee: Electrolux Home Products Corporation N.V.Inventors: Francesco Cavarretta, Elena Pesavento, Maurizio Ugel
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Publication number: 20160168777Abstract: A vented tumble laundry dryer is provided with a heat pump subassembly configured to join with a heater inlet and a blower outlet in an open air flow circuit. The heat pump subassembly forms a closed refrigerant loop. Condenser and evaporator heat exchangers of the subassembly form parts of the open air flow circuit. Air drawn from inside the dryer cabinet passes sequentially through the condenser heat exchanger, the heater, the dryer drum, the process air fan, and the evaporator heat exchanger before being vented to the outside. The heat exchangers have a modular construction that permits one to be stacked on the other and to be angularly offset with respect to the other in both horizontal and vertical planes, thus facilitating integration of the heat pump subassembly into existing vented dryer designs.Type: ApplicationFiled: December 10, 2014Publication date: June 16, 2016Applicant: ELECTROLUX APPLIANCES AKTIEBOLAGInventors: Alberto Bison, Francesco Cavarretta, Gabriele Missio, Luciano Sartor, Federico Sussarello, Massimiliano Vignocchi
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Publication number: 20160138208Abstract: A laundry drying appliance having a cabinet, a treatment chamber inside the cabinet, a drying air recirculation path for conveying air into/out from the treatment chamber, a drying air propeller driven by a drying air propeller motor for causing the drying air to recirculate along the recirculation path, a drying air moisture condensing and heating system in the drying air recirculation path for dehydrating the moisture-laden drying air leaving the treatment chamber and heating the dehydrated drying air before it re-enters into the treatment chamber, laundry drying cycle selector for selecting one out of a number of default laundry drying cycles, a control unit adapted to control the machine operation by operating the drying propeller at a default average speed corresponding to the selected drying cycle, and a command input means operable by the user to change an average working speed of the drying air propeller.Type: ApplicationFiled: July 9, 2013Publication date: May 19, 2016Inventors: Alberto Bison, Francesco Cavarretta, Maurizio Ugel, Massimiliano Vignocchi
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Publication number: 20160047080Abstract: A hybrid vented tumble dryer which includes a drying chamber such as a rotatable drum, a heater, a process air fan, a recirculation duct, and a process air circuit configured to recirculate process air through the dryer. The dryer may include first and second drum seal gaskets located between the drum and first and second bulkheads, respectively. In some embodiments, the recirculation duct is in closed fluid communication with the heater. In other embodiments, the process air circuit is configured such that substantially the only fresh air which enters the process air circuit enters directly into the drying chamber prior to passing through the heater, or such that substantially the only fresh air which enters the process air circuit enters the process air circuit, in an airflow direction of the process air moving through the process air circuit, after the heater and before an outlet of the drying chamber.Type: ApplicationFiled: August 13, 2014Publication date: February 18, 2016Applicant: ELECTROLUX APPLIANCES AKTIEBOLAGInventors: Francesco Cavarretta, Alberto Bison, Maurizio Ugel, Martha Angelica Flores Valdez
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Patent number: 9249538Abstract: A laundry treatment apparatus, in particular a dryer (2a) or washing machine having a drying function, includes a cabinet having a front wall, a rear wall, side walls and a base section. The base section has an internal side facing the interior of the cabinet and an external side exposed to the outside of the cabinet. A laundry storing chamber for treating laundry using process air (A), a process air loop for circulating the process air through the laundry storing chamber, and a heat pump system for dehumidifying and heating the process air are also provided. The heat pump system has a refrigerant loop comprising: a first heat exchanger (10) for heating a refrigerant and cooling the process air (A), a second heat exchanger (12) for cooling the refrigerant and heating the process air, a refrigerant expansion device, a compressor, and an auxiliary heat exchanger (13). The auxiliary heat exchanger (13) is arranged at the external side of the base section.Type: GrantFiled: September 26, 2012Date of Patent: February 2, 2016Assignee: Electrolux Home Products Corporation N.V.Inventors: Alberto Bison, Francesco Cavarretta, Massimiliano Vignocchi
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Publication number: 20150322619Abstract: The present invention relates to a method for controlling a laundry dryer including a fan motor (26) for driving a drying air stream fan (18) with a variable speed (vf) and a drum motor (28) for driving a laundry drum (12), said method comprising the steps of setting a predetermined course for the speed (vd) of the drum motor (28), maintaining the speed (vd) of the drum motor (28) according to the predetermined course for the speed (vd) of said drum motor (28), detecting a power (Pd) or a current absorbed by the drum motor (28), and controlling the speed (vf) of the fan motor (26) on the basis of the absorbed power (Pd) or current of the drum motor (28). The speed (vf) of the fan motor (26) increases with a decreasing absorbed power (Pd) or current of the drum motor (28) and/or the speed (vf) of the fan motor (26) decreases with an increasing absorbed power (Pd) or current of the drum motor (28).Type: ApplicationFiled: November 18, 2013Publication date: November 12, 2015Applicant: Electrolux Home Products Corporation N.V.Inventors: Alberto Bison, Francesco Cavarretta, Maurizio Ugei, Massimiliano Vignocchi
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Publication number: 20150308034Abstract: The invention relates to a heat pump laundry treatment apparatus, in particular a heat pump laundry dryer or a heat pump washing machine having drying function, and to a method of operating such a heat pump laundry treatment apparatus. The laundry treatment apparatus comprises a control unit (51) controlling the operation of the laundry treatment apparatus, a laundry treatment chamber for treating laundry using process air, a process air circuit for circulating the process air, a heat pump system having a refrigerant loop (6) in which the refrigerant fluid is circulated through a first and a second heat exchanger, a compressor (14) for circulating the refrigerant fluid through the refrigerant loop (6), and a cooling fan unit (53) for cooling the compressor (14). During the operation the conveyance capacity of the cooling fan unit (53) is varied, and a detector unit (60) for detecting an operation parameter indicates a state of an electronic board (52).Type: ApplicationFiled: November 14, 2013Publication date: October 29, 2015Applicant: Electrolux Home Products Corporation N.V.Inventors: Francesco Cavarretta, Roberto Ragogna, Maura Pasquotti, Stefano Zandona, Elena Pesavento, Christian Montebello
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Publication number: 20150308035Abstract: The present invention relates to a method for controlling a drying cycle of a laundry dryer having a laundry drum and an air stream fan for circulating drying air through said laundry drum. The method comprises the steps of: starting a drying cycle (14); performing the drying cycle (16); detecting an electric resistance and/or conductivity of the laundry during the drying cycle (16) for estimating a dryness level of the laundry; comparing the electric resistance and/or conductivity of the laundry with an end cycle condition (20; 28, 30; 36); finishing the drying cycle (16), if the end cycle condition (20; 28, 30; 36) is fulfilled. The end cycle condition (20; 28, 30; 36) depends on the rotation speed (SD) of the laundry drum and/or on the rotation speed (SF) of the air stream fan. Further, the present invention relates to a corresponding laundry dryer.Type: ApplicationFiled: November 20, 2013Publication date: October 29, 2015Applicant: Electrolux Home Products Corporation N.V.Inventors: Francesco Cavarretta, Elena Pesavento, Maurizio Ugel
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Publication number: 20150299934Abstract: A method for controlling a laundry dryer with a variable drum rotation speed and a variable fan rotation speed The present invention relates to a method for controlling a laundry dryer including a laundry drum (12) with a variable drum rotation speed (vd) and a drying air stream fan (18) with a variable fan rotation speed (vf). Said method comprising the steps of setting a course of the drum rotation speed (vd) or a course of a drum motor power (Pd) of the laundry drum (12), and setting a fan rotation speed (vf) and/or a fan motor power (Pf) of the drying air stream fan (18) on the basis of the drum rotation speed (vd) and/or the drum motor power (Pd) of the laundry drum (12). The fan rotation speed (vf) and/or the fan motor power (Pf) of the drying air stream fan (18) is decreased with an increasing drum rotation speed (vd) and/or increasing drum motor power (Pd) of the laundry drum (12).Type: ApplicationFiled: November 21, 2013Publication date: October 22, 2015Applicant: Electrolux Home Products Corporation N.V.Inventors: Francesco Cavarretta, Elena Pesavento, Maurizio Ugel
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Publication number: 20140373386Abstract: A method is provided for operating a laundry dryer having a rotatable drum for accommodating clothes to be dried and an apparatus for circulating drying air through the drum. The method comprises the steps of performing a drying cycle selected by a user, wherein the drying cycle comprises predetermined drum movements over time depending on the cycle selected, detecting values indicative of the temperature of the drying air exiting the drum, based on said detected values, determining that the clothes inside the drum are in tangling conditions and starting an untangling operation for untying the clothes inside the drum. The untangling operation comprises modification of the predetermined drum movements.Type: ApplicationFiled: June 26, 2012Publication date: December 25, 2014Applicant: ELECTROLUX HOME PRODUCTS CORPORATION N.V.Inventors: Alberto Bison, Francesco Cavarretta, Maurizio Ugel