Dishwasher appliance and a freeze prevention operation
AssigneeHaier US Appliance Solutions, Inc.
InventorsBrett Alan Farris, Richard F. Whalen, JR., Gregory Schardein
Life of this patent
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Abstract
A method of operating a dishwasher appliance may include determining a freeze prevention condition indicating an initiation of a freeze prevention operation. The method may include directing the fluid circulation assembly, the drain pump, and the sump temperature sensor according to a sump correlation procedure. The method may include comparing sump temperature data to a first sump threshold value. The method may include comparing the sump temperature data to a second sump threshold value. The method may include halting the freeze prevention operation based on comparing the temperature reading to the second sump threshold value.
Claims20
A dishwasher appliance comprising:
- a cabinet comprising a wash tub and a sump positioned below the wash tub;
- a fluid circulation assembly for controlling a flow of water into the wash tub;
- a drain pump for draining water from the sump;
- a sump temperature sensor for obtaining a temperature of a wash fluid within the sump;
- and
- a controller being operable for:
- determining a freeze prevention condition indicating an initiation of a freeze prevention operation,
- directing the fluid circulation assembly, the drain pump, and the sump temperature sensor according to a sump correlation procedure in response to determining the freeze prevention condition,
- comparing sump temperature data to a first sump threshold value in response directing the fluid circulation assembly, the drain pump, and the sump temperature sensor according to the sump correlation procedure, the first sump threshold value being based on a freezing temperature of water and a sump tolerance value,
- comparing the sump temperature data to a second sump threshold value based on comparing the sump temperature data to first sump threshold value, the second sump threshold value being based on a start threshold variable and the sump tolerance value, and
- halting the freeze prevention operation based on comparing the temperature reading to the second sump threshold value.
A method of operating a dishwasher appliance, the dishwasher appliance comprising a cabinet comprising a wash tub and a sump positioned below the wash tub, a fluid circulation assembly for controlling a flow of water into the wash tub, a drain pump for draining water from the sump, and a sump temperature sensor for obtaining a temperature of a wash fluid within the sump, the method comprising:
- determining a freeze prevention condition indicating an initiation of a freeze prevention operation;
- directing the fluid circulation assembly, the drain pump, and the sump temperature sensor according to a sump correlation procedure in response to determining the freeze prevention condition;
- comparing sump temperature data to a first sump threshold value in response directing the fluid circulation assembly, the drain pump, and the sump temperature sensor according to the sump correlation procedure, the first sump threshold value being based on a freezing temperature of water and a sump tolerance value;
- comparing the sump temperature data to a second sump threshold value based on comparing the sump temperature data to first sump threshold value, the second sump threshold value being based on a start threshold variable and the sump tolerance value;
- and
- halting the freeze prevention operation based on comparing the temperature reading to the second sump threshold value.
Dependencies are inferred from the claim text.