Patent ID: 7665892

Claim:
An infrared ear thermometer comprising: a body, which comprises a housing ( 102 ), a display ( 104 ), a power switch ( 106 ), a control circuit ( 108 ), a protrudent first opening ( 110 ), a second opening ( 112 ) and a second outlet ( 122 ); and an infrared sensor ( 114 ), which is provided inside the body and near the protrudent first opening ( 110 ) and comprises a thermopile ( 124 ), a color filter ( 126 ), a metal cap ( 128 ) and a thermistor ( 130 ); said infrared ear thermometer characterized in: a heat dissipation means ( 116 ), which is provided inside the body and comprises a fan ( 118 ) and an air channel ( 120 ), said fan ( 118 ) is provided near the second opening ( 112 ), said air channel ( 120 ) comprises at least one inlet which provided behind said infrared sensor ( 114 ) and an exit which provided at said second outlet ( 122 ); so that when the power switch ( 106 ) is turned on, the thermistor ( 130 ) is actuated to measure the temperature variation of the thermopile ( 124 ), wherein when the temperature variation of the thermopile ( 124 ) exceeds a predetermined level, the heat dissipation means ( 116 ) operates, the fan ( 118 ) urges the outside air flowing in and cooling said infrared sensor ( 114 ), then flowing out of the body via said air channel ( 120 ), and the heat dissipation means ( 116 ) shuts when the temperature variation of the thermopile ( 124 ) becomes lower than or equal to the predetermined level, wherein when the temperature variation of the thermopile ( 124 ) is lower than or equal to the predetermined level, the infrared ear thermometer is at an operational state while when the temperature variation of the thermopile ( 124 ) is higher than the predetermined level, the infrared ear thermometer is at an nonoperational state.