Dishwashing appliances and methods for determining valve status therein
AssigneeHaier US Appliance Solutions, Inc.
InventorKyle Edward Durham
Life of this patent
Estimating the term…
Abstract
Dishwashing appliances and methods, as provided herein, may include features or steps such as measuring a first pressure in a sump with a pressure sensor and storing the first pressure in a memory of the dishwashing appliance as a reference pressure. Dishwashing appliances and methods may further include features or steps for measuring a second pressure within the sump with the pressure sensor after measuring the first pressure, and determining that a check valve is failed when the second pressure exceeds the first pressure by at least a predetermined margin.
Claims18
A method of operating a dishwashing appliance, the dishwashing appliance comprising a sump and a pressure sensor mounted to the sump with a check valve downstream from the sump along a fluid drain path and a drain pump downstream from the check valve along the fluid drain path, the method comprising:
- performing a drain segment, the drain segment comprising activating the drain pump, whereby the drain pump urges wash liquid along the fluid drain path from the sump through the check valve;
- deactivating the drain pump;
- measuring a first liquid pressure within the sump with the pressure sensor after deactivating the drain pump;
- determining the drain segment was successful based on the measured first liquid pressure when the measured first liquid pressure is less than or equal to a predetermined threshold value;
- starting a timer while the drain pump remains deactivated and taking a reference pressure after determining the drain was successful and while the drain pump continues to remain deactivated;
- measuring a second liquid pressure within the sump when the timer expires;
- and
- determining that the check valve is failed when the second pressure exceeds the reference pressure by at least a predetermined value.
A method of operating a dishwashing appliance, the dishwashing appliance comprising a sump and a pressure sensor mounted to the sump with a check valve downstream from the sump along a fluid drain path and a drain pump downstream from the check valve along the fluid drain path, the method comprising:
- activating the drain pump, whereby the drain pump urges wash liquid along the fluid drain path from the sump through the check valve and discharges the wash liquid from the dishwashing appliance;
- deactivating the drain pump;
- measuring, by the pressure sensor, a first pressure within the sump after deactivating the drain pump;
- storing the first pressure in a memory of the dishwashing appliance as a reference pressure;
- measuring, by the pressure sensor, a second pressure within the sump after measuring the first pressure and while the drain pump continues to remain deactivated;
- and
- determining that the check valve is failed when the second pressure exceeds the reference pressure by at least a predetermined value.
Dependencies are inferred from the claim text.