| 摘要 |
<p>A heater wire control circuit (1) to control the AC power supply of a connected heating element (21) comprises an interrupting means (31) having at least three switching states with regard to the AC power supplied to the heating element (21), e.g. both half-waves on, positive or negative half-wave off and both half-waves off, and a control means (32) to determine the temperature of the heating element (21) and an to decide on the switching status of the interrupting means (31) depending on said temperature and/or a user setting.</p> |
