Circuit for preventing liquefaction inside glass cover and lamp

Abstract

The invention proposes a circuit for preventing liquefaction inside a glass cover. A lamp is provided with the glass cover. The circuit comprises a detection unit, a control unit, a switch and a hot air fan, wherein the detection unit is used for detecting the temperature of the glass cover, the control unit comprises a first input end, a second input end and an output end, the first input end of the control unit is connected with the a second output end of the detection unit, the second input end of the control unit is connected with an anode of a power supply, the output end of the control unit is connected with a cathode of the power supply, and the switch is controlled by the control unit and connected with the power supply. When the detection unit detects that the temperature of the glass cover is at a first set value, the control unit controls the switch to be switched on, the hot air fan works and blows out hot air for heating the glass cover; and when the detection unit detects that the temperature of the glass cover is at a second set value, the control unit controls the switch to be switched off, and the hot air fan stops working. The invention also proposes a lamp. With the adoption of the circuit, a liquefaction phenomenon inside the glass cover can be prevented, so that the lamp is protected.

Description

technical field [0001] The invention relates to an alarm circuit, in particular to a circuit for preventing liquefaction in a glass cover and a lamp. Background technique [0002] In the cold winter, water droplets will appear on the glass of the house, which is the phenomenon of air liquefaction. Now the lamps and lanterns will also appear the same in winter. Now, because the light source of the lamps and lanterns heats the internal air, the external glass cover is very cold. When the hot air meets the cold glass cover, water droplets will appear inside. It will cause the light source to explode or be damaged. Contents of the invention [0003] The technical problem to be solved by the present invention is to overcome the above-mentioned deficiencies in the prior art, and propose a circuit and a lamp to prevent liquefaction in the glass cover, which can solve the problem of damage to the light source due to liquefaction in the glass cover of the lamp when the weather is ...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to overcome the above-mentioned deficiencies in the prior art, and propose a circuit and a lamp to prevent liquefaction in the glass cover, which can solve the problem of damage to the light source due to liquefaction in the glass cover of the lamp when the weather is cold. question

Images