Load detection and cycle modification in laundry appliance applications
AssigneeWhirlpool Corporation
InventorsMichael B. Daly, Seth Herndon, Bruce M. Wiatrak
Life of this patent
Estimating the term…
Abstract
Inferring the laundry cycle type for a load of laundry items is provided. Measurements are performed of a laundry load in a drum of a laundry appliance during a pre-rinse cycle, the measurements including one or more of an absorption ratio of the laundry load, a retention ratio of the laundry load, a dry mass of the laundry load, a wet mass of the laundry load, or a spun mass of the laundry load. A model is used to determine load parameters based on the measurements. The load parameters are used to determine a laundry cycle type for the laundry load.
Claims19
A method for inferring a laundry cycle type for a load of laundry items, comprising:
- performing measurements of a laundry load in a drum of a laundry appliance during a pre-rinse cycle, the measurements including a dry mass of the laundry load, a wet mass of the laundry load, a spun mass of the laundry load, and time, the performing including
- estimating the dry mass of the laundry load,
- adding water into the drum,
- measuring a time between adding the water and the water reaching a sump of the laundry appliance,
- estimating the wet mass of the laundry load in comparison to the dry mass,
- spinning out the laundry load, and
- estimating the spun mass of the laundry load in comparison to the dry mass;
- using a model to determine load parameters based on the measurements;
- and
- using the load parameters to determine a laundry cycle type for the laundry load.
A method for inferring a laundry cycle type for a load of laundry items, comprising:
- performing measurements of a laundry load in a drum of a laundry appliance during a pre-rinse cycle, the measurements including:
- providing the water into the drum by opening a valve for a predefined amount of time, thereby providing a predefined quantity of water,
- measuring a time between adding the water and the water reaching a sump of the laundry appliance,
- identifying a maximum recorded sump pressure of a sump pressure sensor after adding the water and before spinning out the laundry load,
- identifying the wet mass based on an amount of retained water corresponding to the maximum recorded sump pressure as compared to the predefined quantity of water,
- receiving motor parameters from a motor of the laundry appliance during an initial dry spin of the laundry load before adding the water, the motor parameters including voltage, current, torque, and/or speed information, and
- using a machine learning algorithm to estimate the dry mass according to the motor parameters;
- using a model to determine load parameters based on the measurements;
- and
- using the load parameters to determine a laundry cycle type for the laundry load.
Dependencies are inferred from the claim text.