Water temperature control system for a clothes washing machine
First Claim
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1. Water temperature control system for a clothes washing machine comprising:
- control means for establishing a control effect representative of a desired water temperature for use in the clothes washing tub;
first and second valve means for supplying incoming cold and hot water, respectively;
mixing means for combining the water flow from the valve means before entry into the clothes washing tub;
means for sensing the temperature of the combined water flow before entry into the tub;
means for determining the cumulative average temperature of said combined water flow;
means for periodically comparing said average temperature to said desired temperature to determine the difference between said two temperatures;
and means responsive to said comparing means when said difference exceeds a predetermined amount for actuating said valve means to cause said combined water temperature to change in the direction of approaching said desired temperature.
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Abstract
A microprocessor controlled water temperature control system for a clothes washer. The temperature of incoming mixed hot and cold water is periodically sensed, a cumulative average temperature of the mixed water is compared to a desired temperature value stored in memory. When the comparison results in a temperature difference which exceeds a predetermined error limit, the appropriate hot and/or cold water valves are turned on or off causing the average temperature of the mixed water to change toward the desired temperature value.
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Citations
3 Claims
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1. Water temperature control system for a clothes washing machine comprising:
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control means for establishing a control effect representative of a desired water temperature for use in the clothes washing tub; first and second valve means for supplying incoming cold and hot water, respectively; mixing means for combining the water flow from the valve means before entry into the clothes washing tub; means for sensing the temperature of the combined water flow before entry into the tub; means for determining the cumulative average temperature of said combined water flow; means for periodically comparing said average temperature to said desired temperature to determine the difference between said two temperatures; and means responsive to said comparing means when said difference exceeds a predetermined amount for actuating said valve means to cause said combined water temperature to change in the direction of approaching said desired temperature. - View Dependent Claims (2, 3)
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Specification