Patent ID: 8072339

Claim:
A remote control system comprising: a wireless handheld RC ( 1 ) comprising a first processor ( 10 ), a keypad ( 12 ), a temperature sensor ( 13 ), and an RF unit ( 15 ); and a receiver ( 3 ) mounted on an air conditioner and comprising an RF unit ( 32 ), a second processor ( 30 ), and a master processing unit ( 33 ), wherein the first processor ( 10 ) compares temperature measured by the temperature sensor ( 13 ) with a set temperature of the air conditioner, the first processor ( 10 ) sends a temperature value to the RF unit ( 15 ) or a temperature adjustment instruction to the RF unit ( 15 ) if the measured temperature is not within a predetermined range of the set temperature, the RF unit ( 15 ) transmits the temperature value or the temperature adjustment instruction to the RF unit ( 32 ) via RF signals, the second processor ( 30 ) receives the RF signals from the RF unit ( 32 ), and the second processor ( 30 ) either (i) converts the RF signals into IR signals with RF data being converted into corresponding IR data such that the master processing unit ( 33 ) receives the IR signals from the second processor ( 30 ) and performs a temperature adjustment of the air conditioner if there is a sending of the temperature adjustment instruction to the RF unit ( 15 ) or (ii) sends the RF signals to the master processing unit ( 33 ); wherein the temperature sensor ( 13 ) comprises a thermistor and a resistor, the thermistor having one end connected to a voltage source and the other end connected to one end of the resistor, one end of the resistor connected to an A/D (analog to digital converter) port of the first processor ( 10 ) and the other end thereof being connected to an output port of the first processor ( 10 ); wherein an analog voltage measured at a joining point of the thermistor and the resistor is fed to the A/D port to convert into a digital representation of the voltage, and the digital representation of the voltage is transformed into a corresponding temperature value representing the measured temperature of the temperature sensor ( 13 ) by the first processor ( 10 ); wherein the first processor ( 10 ) activates to adjust the set temperature by outputting a low level on its output port if the measured temperature is not within the predetermined range of the set temperature; and wherein the first processor ( 10 ) issues a high level on its output port to stop supplying current to the resistor if the measured temperature is within the predetermined range of the set temperature.