Laundry washing machine with automatic rinse operation type selection
A laundry washing machine and method utilize a fluid property sensor to dynamically select between different types of rinse operations, e.g., fill rinse operations or spin rinse operations, performed during a wash cycle.
1. A laundry washing machine, comprising:
a wash tub disposed within a housing;
a fluid property sensor configured to sense turbidity and/or conductivity of fluid from the wash tub; and
a controller coupled to the fluid property sensor, the controller configured to initiate a wash phase of a wash cycle to wash a load disposed in the wash tub, determine prior to initiating a rinse phase of the wash cycle and with the fluid property sensor a fluid property value associated with the wash fluid used during the wash phase of the wash cycle to assess a concentration of detergent and/or soil in the wash fluid, select prior to initiating the rinse phase of the wash cycle between a fill rinse operation and a spray rinse operation for a rinse phase of the wash cycle based at least in part upon the determined fluid property value, and after selecting between the fill rinse operation and the spray rinse operation, initiate the rinse phase of the wash cycle using the selected fill rinse or spray rinse operation, wherein the controller is configured to select between the fill rinse operation and the spray rinse operation by:
determining from the determined fluid property value whether the concentration of detergent and/or soil in the wash fluid meets a threshold;
selecting the fill rinse operation for the rinse phase in response to the threshold being met; and
selecting the spray rinse operation for the rinse phase in response to the threshold not being met.
2. The laundry washing machine of claim 1 , wherein the fluid property sensor includes a turbidity sensor configured to measure turbidity of the fluid from the wash tub, and wherein the controller is configured to select between the fill rinse operation and the spray rinse operation at least based upon turbidity of the fluid from the wash tub.
3. The laundry washing machine of claim 2 , wherein the turbidity sensor is further configured to measure conductivity of the fluid from the wash tub, and wherein the controller is further configured to select between the fill rinse operation and the spray rinse operation based upon conductivity of the fluid from the wash tub.
4. The laundry washing machine of claim 1 , wherein the controller is further configured to determine whether to perform an additional rinse operation based at least in part upon a second fluid property value sensed by the fluid property sensor after the selected fill rinse operation or spray rinse operation is performed.
5. The laundry washing machine of claim 4 , wherein the controller is configured to select between the fill rinse operation and the spray rinse operation to be performed as the additional rinse operation based upon the second fluid property value.
6. The laundry washing machine of claim 4 , wherein the controller is configured to repeat the selected fill rinse operation or spray rinse operation as the additional rinse operation.
7. The laundry washing machine of claim 1 , further comprising a weight sensor operatively coupled to the wash tub to sense a weight associated with the wash tub and a fluid level sensor configured to sense a fluid level in the wash tub, wherein the controller is configured to dynamically select a load type from among a plurality of load types based at least upon weight and fluid level values sensed respectively by the weight and fluid level sensors, and to control a wash cycle at least based upon the selected load type.
8. The laundry washing machine of claim 7 , further comprising a water inlet configured to dispense water into the wash tub, wherein the controller is further configured to initiate an initial fill phase of a wash cycle by controlling the water inlet to dispense water into the wash tub and to dynamically select the load type during the initial fill phase after a selected amount of water has been dispensed by the water inlet.
9. The laundry washing machine of claim 1 , further comprising a detergent dispenser configured to dispense detergent for washing a load disposed in the wash tub, wherein the controller is configured to control dispensing of detergent by the detergent dispenser based at least in part upon the fluid property value.
10. The laundry washing machine of claim 1 , wherein determining from the determined fluid property value whether the concentration of detergent and/or soil in the wash fluid meets a threshold includes determining from the determined fluid property value whether the concentration of soil in the wash fluid meets the threshold.