Abstract: There is a significant temperature difference between the display temperature and the actual outlet temperature in instant electric water tap, which directly affects user experience and safety. To address this issue, this study focuses on the internal structure of the faucet and investigates the influence of different flow channel structures and temperature measurement point layouts on the temperature deviation through numerical simulation methods. The improvement effects of various schemes on temperature response speed, stability, and measurement accuracy are evaluated, aiming to reduce the temperature difference through optimized design. The results show that optimizing the flow channel to reduce flow dead zones, improving heat exchange efficiency, and precisely configuring the temperature sensor position can effectively reduce system thermal inertia and significantly minimize the deviation between the display and outlet temperatures. Based on the above, the optimal solution obtained in this study achieves a significant improvement in display accuracy while controlling cost and size, providing a practical basis for the precise temperature control and structural design of instant electric water tap.

Key words: Instant electric water tap, Temperature difference, Structural optimization, CFD