Warm-water inflow control method for microprocessor-controlled domestic dishwashers and washing machines

摘要

In a known water-supply arrangement for domestic appliances, cold, warm or hot water is fed to a washing machine from three separate delivery conduits controlled via solenoid valves. The solenoid valves are actuated in a programme-dependent manner; specifically independently of the water temperatures actually prevailing in the supply systems. Standing water cooled in the delivery conduits has little heat content and is likewise also introduced. In the method according to the invention, cooled mains feed water is rejected altogether and is used only when the temperatures are sufficiently high for a washing or rinsing process. By means of the electrical house BUS installation technique, consumers are informed of the heat content and temperature of the supply arrangement itself and of the appliance water feed conduit. Microprocessors within the appliance decide whether the use of external warm water affords energy advantages in relation to internal heating. The method according to the invention can be employed in electronically controlled domestic washing machines and dishwashers which, moreover, are designed for warm-water and/or cold-water connection.