Patent ID: 6305610
Filing Date: 2001-10-23
Classification: D06F,G05D

Abstract:
A fluid temperature control circuit for a washing machine having a hot water valve and a cold water valve controllable to provide a flow of hot and cold water, respectively, into a washing chamber, and a temperature selector switch having a first output to energize the hot water valve, a second output to energize the cold water valve, and a third output to enable operation of the fluid temperature control circuit, the fluid temperature control circuit comprising:a temperature sensing element positioned to sense a temperature of water flowing into the washing chamber;a window detector circuit in sensory communication with said temperature sensing element, said window detector circuit having a first and a second output, said first output being active when the temperature of the water is below a first threshold, and said second output being active when the temperature of the water is above a second threshold; anda pair of water valve driver circuits responsive to said first and said second outputs of said window detector circuit to energize the hot water valve and the cold water valve.