Patents by Inventor David Persson
David Persson 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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Publication number: 20230062451Abstract: A washing appliance comprising a liquid container, a liquid level indicator unit configured to provide data indicative of a liquid level in the liquid container, a drain conduit, and a drain pump. The washing appliance further comprises a control arrangement configured to operate the drain pump during a first time period, control the drain pump to a standstill during a second time period following the first time period, and monitor a change of the liquid level during the second time period using data from the liquid level indicator unit. Also provided are a method of detecting an operational error in a washing appliance, a computer program, a computer-readable medium, and a control arrangement for a washing appliance.Type: ApplicationFiled: January 24, 2020Publication date: March 2, 2023Applicant: Electrolux Appliances AktiebolagInventor: David Persson
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Patent number: 11272825Abstract: A dishwasher may include a washing chamber and a wash arm arrangement having a wash arm rotatably arranged in the washing chamber, and a satellite spray device arranged on the wash arm. The dishwasher may include at least one sensor configured to sense a rotational position of the wash arm and a control unit configured to monitor consecutive sensed rotational positions of the wash arm. The control unit may be configured to calculate a rotational speed of the wash arm based on an elapsed time and a rotational distance between two sensed rotational positions, and may be configured to estimate a current rotational position of the wash arm based on an elapsed time since a previously sensed rotational position and the calculated rotational speed. The control unit may adapt the pumping intensity of a pump of the dishwasher based on the estimated current rotational position of the wash arm.Type: GrantFiled: December 15, 2016Date of Patent: March 15, 2022Inventors: Magnus Wahlberg, Finn Svensson, David Persson, Camilla Runnquist, Maciej Zienkiewicz, David Hedberg, John Anello
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Patent number: 11172805Abstract: Provided are a method performed by an appliance for washing and rinsing goods, where some of the goods loaded into the appliance are sensitive to process water temperature changes, and an appliance performing the method. The method may include receiving via a user interface, an instruction that an appliance, during execution of a general-type washing program, should take into account that goods sensitive to temperature changes are loaded into the appliance, measuring a temperature value in a washing compartment of the appliance upon executing a draining process, and supplying fresh water to the washing compartment of the appliance. The method may include measuring, when the fresh water has been supplied, whether the process water being accommodated in a sump of the appliance is at a target temperature value or not and if not adjusting the temperature of the process water in the sump to attain the target temperature value.Type: GrantFiled: July 5, 2017Date of Patent: November 16, 2021Inventor: David Persson
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Patent number: 11141039Abstract: A method for handling a clogging condition in a dishwasher may include detecting the clogging condition; upon detecting the clogging condition, interrupting a wash cycle of the dishwasher and executing a remedial operation to remove the clogging condition. The remedial operation may include executing a drain operation for a predetermined drain time during which a drain pump may be continuously or intermittently operated to drain water from a sump of the dishwasher; following the drain operation, executing a fill operation for a predetermined fill time during which a fill valve may be continuously or intermittently activated to add water to the dishwasher; and following the fill operation, executing a circulation operation during which a circulation pump may be continuously or intermittently operated to remove the clogging condition. A dishwasher and a control system for handling a clogging condition are also provided.Type: GrantFiled: February 24, 2017Date of Patent: October 12, 2021Inventor: David Persson
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Patent number: 11076740Abstract: Provided herein are an appliance and method for washing and rinsing goods. The appliance may include a circulation pump, a sensing arrangement arranged to measure an indication of circulation pump pressure or process water flow rate through the circulation pump, and a controller arranged to control operating speed of the circulation pump. The controller may be further arranged to detect that the indicated circulation pump pressure or process water flow rate through the circulation pump is insufficient, and gradually reduce operating speed of the circulation pump until the circulation pump pressure or the process water flow rate through the circulation pump is at a sufficient operational level.Type: GrantFiled: October 7, 2015Date of Patent: August 3, 2021Inventor: David Persson
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Patent number: 11045067Abstract: A dishware supporting arrangement is provided that may include a mesh structure and a tilting mechanism. The mesh structure may include a structure main extension plane and may include a first plurality of ribs connected to a second plurality of ribs. The first plurality of ribs may extend along a first plane at a first angle and the second plurality of ribs may extend along a second plane at a second angle. The tilting mechanism may allow the mesh structure to be titled around at least one axis between a first position and a second position and may hold the mesh structure in the first position and in the second position. Each of the first plurality of ribs and each of the second plurality of ribs may be inclined in relation to the rack main extension plane at the first position and at the second position.Type: GrantFiled: October 19, 2016Date of Patent: June 29, 2021Inventors: Giuseppe Dreossi, Anna Delin, Marie Hakkarainen, David Persson
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Patent number: 11019979Abstract: Provided are a method of detecting a change in process water flow of a circulation pump in an appliance for washing and rinsing goods, and an appliance performing the method. An appliance for washing and rinsing goods may be provided including a circulation pump, a sensing arrangement arranged to measure a property indicating torque of the circulation pump, and a controller. The controller may be arranged to average a first set of values of the measured property, thereby creating a first average, average at least a further set of values of the measured property, thereby creating at least one further average, compare the first average with the at least one further average, and to detect change in process water flow of the circulation pump based on a difference between the first average and the at least one further average.Type: GrantFiled: February 15, 2016Date of Patent: June 1, 2021Assignee: Electrolux Appliances AktiebolagInventors: David Persson, Arne Nensén
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Patent number: 10939795Abstract: A method and corresponding appliance for carrying out the method may include detecting insufficient circulation pump pressure or process water flow rate through a circulation pump of the appliance, supplying water to a compartment of the appliance and logging a time period during which the water is supplied to the compartment and increasing the speed of the circulation pump to a target pump speed where the circulation pump pressure or the process water flow rate through the circulation pump has reached a sufficient operational level. The method may include logging at least two circulation pump speeds and a time period during which the water is supplied to the compartment, and estimating the water fill rate based on predetermined difference in compartment process water volume for the logged at least two speeds and the water supply time period.Type: GrantFiled: November 19, 2015Date of Patent: March 9, 2021Assignee: ELECTROLUX APPLIANCES AKTIEBOLAGInventor: David Persson
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Patent number: 10786137Abstract: Provided herein is a method performed by an appliance for washing and rinsing goods of detecting process water added to a sump of the appliance during interruption of operation of the appliance, upon recommence of appliance operation, and an appliance performing the method. The method may include detecting process water added to a sump of the appliance during interruption of operation of the appliance, upon recommence of appliance operation. The method may include increasing operating speed of a circulation pump of the appliance to a target speed, measuring an indication of circulation pump pressure or process water flow rate through the circulation pump, and determining that process water has been added to the sump of the appliance during the interruption in case the measured pressure or flow rate is maintained at a sufficient level after the speed of the circulation pump has reached the target speed.Type: GrantFiled: November 25, 2015Date of Patent: September 29, 2020Assignee: ELECTROLUX APPLIANCES AKTIEBOLAGInventor: David Persson
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Publication number: 20200221923Abstract: Provided are a method performed by an appliance for washing and rinsing goods, where some of the goods loaded into the appliance are sensitive to process water temperature changes, and an appliance performing the method. The method may include receiving via a user interface, an instruction that an appliance, during execution of a general-type washing program, should take into account that goods sensitive to temperature changes are loaded into the appliance, measuring a temperature value in a washing compartment of the appliance upon executing a draining process, and supplying fresh water to the washing compartment of the appliance. The method may include measuring, when the fresh water has been supplied, whether the process water being accommodated in a sump of the appliance is at a target temperature value or not and if not adjusting the temperature of the process water in the sump to attain the target temperature value.Type: ApplicationFiled: July 5, 2017Publication date: July 16, 2020Inventor: David PERSSON
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Patent number: 10595703Abstract: Provided herein is a method of determining whether process water is present in a circulation pump of an appliance for washing and rinsing goods, and an appliance performing the method. The method of determining whether process water is present in a circulation pump of an appliance for washing and rinsing goods may include measuring a minimum value of a property representing load of the circulation pump at a predetermined first speed, measuring a maximum value of a property representing load of the circulation pump at a predetermined second speed, the second speed being higher than the first speed, determining a relation between said minimum value and said maximum value, and determining, from said relation, whether process water is present in the circulation pump.Type: GrantFiled: November 10, 2015Date of Patent: March 24, 2020Assignee: Electrolux Appliances AktiebolagInventor: David Persson
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Publication number: 20200037846Abstract: A dishware supporting arrangement is provided that may include a mesh structure and a tilting mechanism. The mesh structure may include a structure main extension plane and may include a first plurality of ribs connected to a second plurality of ribs. The first plurality of ribs may extend along a first plane at a first angle and the second plurality of ribs may extend along a second plane at a second angle. The tilting mechanism may allow the mesh structure to be titled around at least one axis between a first position and a second position and may hold the mesh structure in the first position and in the second position. Each of the first plurality of ribs and each of the second plurality of ribs may be inclined in relation to the rack main extension plane at the first position and at the second position.Type: ApplicationFiled: October 19, 2016Publication date: February 6, 2020Inventors: Giuseppe DREOSSI, Anna DELIN, Marie HAKKARAINEN, David PERSSON
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Publication number: 20190357749Abstract: A method for handling a clogging condition in a dishwasher may include detecting the clogging condition; upon detecting the clogging condition, interrupting a wash cycle of the dishwasher and executing a remedial operation to remove the clogging condition. The remedial operation may include executing a drain operation for a predetermined drain time during which a drain pump may be continuously or intermittently operated to drain water from a sump of the dishwasher; following the drain operation, executing a fill operation for a predetermined fill time during which a fill valve may be continuously or intermittently activated to add water to the dishwasher; and following the fill operation, executing a circulation operation during which a circulation pump may be continuously or intermittently operated to remove the clogging condition. A dishwasher and a control system for handling a clogging condition are also provided.Type: ApplicationFiled: February 24, 2017Publication date: November 28, 2019Inventor: David PERSSON
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Publication number: 20190290095Abstract: A dishwasher may include a washing chamber and a wash arm arrangement having a wash arm rotatably arranged in the washing chamber, and a satellite spray device arranged on the wash arm. The dishwasher may include at least one sensor configured to sense a rotational position of the wash arm and a control unit configured to monitor consecutive sensed rotational positions of the wash arm. The control unit may be configured to calculate a rotational speed of the wash arm based on an elapsed time and a rotational distance between two sensed rotational positions, and may be configured to estimate a current rotational position of the wash arm based on an elapsed time since a previously sensed rotational position and the calculated rotational speed. The control unit may adapt the pumping intensity of a pump of the dishwasher based on the estimated current rotational position of the wash arm.Type: ApplicationFiled: December 15, 2016Publication date: September 26, 2019Inventors: Magnus WAHLBERG, Finn SVENSSON, David PERSSON, Camilla RUNNQUIST, Maciej ZIENKIEWICZ, David HEDBERG, John ANELLO
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Publication number: 20190174989Abstract: Provided are a method of detecting a change in process water flow of a circulation pump in an appliance for washing and rinsing goods, and an appliance performing the method. An appliance for washing and rinsing goods may be provided including a circulation pump, a sensing arrangement arranged to measure a property indicating torque of the circulation pump, and a controller. The controller may be arranged to average a first set of values of the measured property, thereby creating a first average, average at least a further set of values of the measured property, thereby creating at least one further average, compare the first average with the at least one further average, and to detect change in process water flow of the circulation pump based on a difference between the first average and the at least one further average.Type: ApplicationFiled: February 15, 2016Publication date: June 13, 2019Inventors: David PERSSON, Arne NENSÉN
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Patent number: 10271707Abstract: A domestic appliance and a method at the domestic appliance for detecting presence of process water in a pump of the domestic appliance are provided. The method of detecting process water in a pump of a domestic appliance may include operating the pump to rotate in a first direction, recording a first response of the pump rotating in the first direction based on a measured pump operation parameter, operating the pump to rotate in a second direction, and recording a second response of the pump rotating in the second direction based on the measured pump operation parameter. The method may further include comparing the first response and the second response, and determining the presence of water in the pump based on the comparison of the first and second response.Type: GrantFiled: December 15, 2014Date of Patent: April 30, 2019Assignee: Electrolux Appliances AktiebolagInventor: David Persson
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Publication number: 20190069752Abstract: Provided herein are an appliance and method for washing and rinsing goods. The appliance may include a circulation pump, a sensing arrangement arranged to measure an indication of circulation pump pressure or process water flow rate through the circulation pump, and a controller arranged to control operating speed of the circulation pump. The controller may be further arranged to detect that the indicated circulation pump pressure or process water flow rate through the circulation pump is insufficient, and gradually reduce operating speed of the circulation pump until the circulation pump pressure or the process water flow rate through the circulation pump is at a sufficient operational level.Type: ApplicationFiled: October 7, 2015Publication date: March 7, 2019Applicant: ELECTROLUX APPLIANCES AKTIEBOLAGInventor: David PERSSON
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Publication number: 20180310798Abstract: Provided herein is a method performed by an appliance for washing and rinsing goods of detecting process water added to a sump of the appliance during interruption of operation of the appliance, upon recommence of appliance operation, and an appliance performing the method. The method may include detecting process water added to a sump of the appliance during interruption of operation of the appliance, upon recommence of appliance operation. The method may include increasing operating speed of a circulation pump of the appliance to a target speed, measuring an indication of circulation pump pressure or process water flow rate through the circulation pump, and determining that process water has been added to the sump of the appliance during the interruption in case the measured pressure or flow rate is maintained at a sufficient level after the speed of the circulation pump has reached the target speed.Type: ApplicationFiled: November 25, 2015Publication date: November 1, 2018Inventor: David Persson
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Publication number: 20180310799Abstract: A method and corresponding appliance for carrying out the method may include detecting insufficient circulation pump pressure or process water flow rate through a circulation pump of the appliance, supplying water to a compartment of the appliance and logging a time period during which the water is supplied to the compartment and increasing the speed of the circulation pump to a target pump speed where the circulation pump pressure or the process water flow rate through the circulation pump has reached a sufficient operational level. The method may include logging at least two circulation pump speeds and a time period during which the water is supplied to the compartment, and estimating the water fill rate based on predetermined difference in compartment process water volume for the logged at least two speeds and the water supply time period.Type: ApplicationFiled: November 19, 2015Publication date: November 1, 2018Inventor: David Persson
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Publication number: 20180310797Abstract: Provided herein is a method of determining whether process water is present in a circulation pump of an appliance for washing and rinsing goods, and an appliance performing the method. The method of determining whether process water is present in a circulation pump of an appliance for washing and rinsing goods may include measuring a minimum value of a property representing load of the circulation pump at a predetermined first speed, measuring a maximum value of a property representing load of the circulation pump at a predetermined second speed, the second speed being higher than the first speed, determining a relation between said minimum value and said maximum value, and determining, from said relation, whether process water is present in the circulation pump.Type: ApplicationFiled: November 10, 2015Publication date: November 1, 2018Inventor: David PERSSON