Freezing preventive LED lamp
Provided is an LED lamp for prevention of freezing, comprising: a housing opened at a front side thereof; an LED unit disposed inside the housing; a lens mounted at the opened front side of the housing and configured to allow lighting light emitted from the LED unit to transmit therethrough; a heating member disposed at the rear side of the lens and configured to generate heat by being supplied with power; a sensor unit disposed at the inside of the housing and configured to sense the internal temperature of the housing; and a control unit configured to control the power supplied to the heating member depending on the internal temperature of the housing, sensed by the sensor unit.
1. An LED lamp for prevention of freezing, comprising:
a housing ( 110 ) opened at a front side thereof;
an LED unit ( 120 ) disposed inside the housing ( 110 );
a lens ( 130 ) mounted at the opened front side of the housing ( 110 ) and configured to allow lighting light emitted from the LED unit ( 120 ) to transmit therethrough;
a heating member ( 140 ) disposed at the rear side of the lens and configured to generate heat by being supplied with power;
a sensor unit ( 150 ) disposed at the inside of the housing ( 110 ) and configured to sense the internal temperature of the housing ( 110 ); and
a control unit ( 200 ) configured to control the power supplied to the heating member ( 140 ) depending on the internal temperature of the housing ( 110 ), sensed by the sensor unit ( 150 ).
2. The LED lamp for prevention of freezing according to claim 1 , wherein the control unit ( 200 ) drops a voltage being applied to the heating member if the internal temperature of the housing ( 110 ), sensed by the sensing unit ( 150 ), is higher than a predetermined temperature, and
boosts a voltage being applied to the heating member ( 140 ) if the internal temperature of the housing ( 110 ), sensed by the sensing unit ( 150 ), is lower than the predetermined temperature.
3. The LED lamp for prevention of freezing according to claim 2 , wherein the heating member ( 140 ) generates heat by being supplied with power from the control unit ( 200 ) when power is applied to the LED unit ( 120 ).
4. The LED lamp for prevention of freezing according to claim 3 , wherein the control unit ( 200 ) includes:
an analysis unit ( 210 ) configured to compare the internal temperature of the housing ( 110 ), sensed by the sensing unit ( 150 ), with the predetermined temperature, and analyze a compared result; and
a transformer unit ( 220 ) configured to receive the compared result from the analysis unit ( 210 ) and boost or drop a voltage to be applied the heating member ( 140 ) based on the compared result.
5. The LED lamp for prevention of freezing according to claim 4 , wherein the predetermined temperature ranges from 40° C. to 60° C.
6. The LED lamp for prevention of freezing according to claim 1 , wherein the heating member ( 140 ) is a transparent electrode film attached on the inner surface of the lens.
7. The LED lamp for prevention of freezing according to claim 1 , wherein the sensor unit ( 150 ) is disposed at a position that is not affected by the lighting light emitted from the LED unit ( 120 ).
8. The LED lamp for prevention of freezing according to claim 7 , further comprising a reflector ( 160 ) disposed at the inside of the housing ( 110 ) and configured to receive lighting light emitted from the LED unit ( 120 ) and reflect the emitted lighting light to the lens ( 130 ),
wherein the reflector ( 160 ) comprises:
a reflective plate ( 161 ) inserted into the internal space part of the housing ( 110 ) and configured to receive the lighting light emitted from the LED unit ( 120 );
a frame part ( 162 ) formed protrudingly radially from a front end portion of the reflective plate ( 161 ) and connected to a front end portion of the housing ( 110 ); and
a through-hole ( 163 ) formed at a vertical portion of the frame part ( 162 ) and configured to allow the sensor unit 150 to be inserted thereinto.