| 摘要 |
A faucet supplies water at a computer controlled temperture. Hot and cold water valves are connected to hot and cold water supplies. A mixing connection is attached between the valves for mixing the hot and cold water together and supplying it at a faucet discharge. Each valve has a movable valve member which can be moved toward and away from a valve seat to control the flow of hot or cold water. A stepper motor is connected to each of the valve members and can be controlled by a digital error signal to rotate, in steps, either to increase or decrease the flow of hot or cold water. A temperature sensor is provided at the faucet outlet for sensing the actual temperature. A microcomputer receives signals corresponding to the actual temperature. The actual temperature is compared to a selected set point temperature which is programmed into the microcomputer. If an error exists between the actual and set point temperatures, control signals are supplied to the stepper motors for changing the flow of hot or cold water to move the actual temperature toward the set point temperature.
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