发明名称 |
Method and apparatus using phases for communication in thermostat circuit |
摘要 |
In a receiver circuit module (22) having a microcontroller (U1), an output line (FILTER_LED) connectable to a source circuit module (20) is also used as an input. A switch (SW2) disposed in the source circuit module is closed to change the wave form which is read by the microcontroller as an input signal to drive a 5V signal to the gate of a solid state switch (Q1) turning it on to thereby energize an output device in the source circuit module via the same output line (FILTER_LED). By means of the dual function of the output line the control can notify a user of an HVAC system, for example, of system problems with a blinking light and/or an audible alarm as well as serving to notify the user at a remote location that selected maintenance is due, such as a need to change filters without additional control lines. The source circuit module can be mounted near the thermostat of the HVAC system or on the central heating and cooling unit.
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申请公布号 |
US6307464(B1) |
申请公布日期 |
2001.10.23 |
申请号 |
US20000563081 |
申请日期 |
2000.05.01 |
申请人 |
TEXAS INSTRUMENTS INCORPORATED |
发明人 |
MILLER MARK E.;ANDERSON TIMOTHY L.;GARNETT RONALD E. |
分类号 |
F24F11/00;(IPC1-7):H04M11/04 |
主分类号 |
F24F11/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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