A temperature detection circuit and an LED lamp with a temperature control protection circuit
A technology for temperature detection circuits and LED lamps, applied in circuit layout, lamp circuit layout, electric light source, etc., can solve problems such as low sensitivity, high temperature control switch cost, inability to realize lighting functions, etc., and achieve a wide range of applications.
Active Publication Date: 2017-10-13
深圳市冰夏科技有限公司
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Problems solved by technology
[0006] 1. When the temperature of the LED lamp itself is too high, cut off the input power to make the lamp automatically turn off the lamp. However, in some occasions, even if the temperature is high, it still needs to be illuminated. If the lamp is turned off at this time, the lighting function cannot be realized. Meet the needs of use
[0007] 2. Use the normally closed temperature control switch to control the circuit. At present, the temperature control switch generally uses the principle that the internal bimetal sheet produces arc changes under the condition of heat, and touches the internal linkage components to generate on or off functions. These, The temperature control switch has high cost and low sensitivity
Method used
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Embodiment 1
[0031] Embodiment 1, this embodiment is an LED lamp with an LED temperature control protection circuit, such as figure 2 , image 3 As shown, in this embodiment, the LED lamp beads 4 are evenly distributed on the front of a metal disk with high thermal conductivity. The heat sink includes two parts. The heat sink 2 is closely attached to the lamp panel 1, which has a large heat dissipation area. In order to ensure the air circulation around the heat sink 2, in this embodiment, the heat sink 2 is also The structure of installing the cooling fan 3 is the same as the installation method of the CPU fan in the current computer, so that the heat dissipation can be effectively ensured. In this embodiment, there is a feature that the power supply system that provides power for the LED lamp beads and the fan is provided separately from the lamp panel and the heat sink, and only wires are used to connect the power supply to the LED lamp beads and the power input end of the cooling fan...
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The invention relates to a temperature detection circuit and an LED lamp with a temperature control protection circuit. In the temperature detection circuit, a temperature control resistance, a comparison resistance branch and a reference voltage signal are input into a comparator. When the temperature reaches a set temperature , the comparator flips over, controls the triode behind or cuts off, and the triode outputs different voltage signals to indicate whether the set temperature is reached. The LED lamp includes such a temperature detection circuit. When the temperature reaches 70 degrees, it will perform temperature control protection and cut off the power supply of some LED lamp beads to reduce heat generation and temperature.
Description
technical field [0001] The invention relates to an LED lamp, in particular to a detection circuit for detecting the temperature of the LED lamp and an LED lamp with a temperature control protection circuit. Background technique [0002] At present, the application of LED is more and more extensive, and LED lamps for daily indoor and outdoor lighting are also becoming more and more popular. At present, LED lighting is developing more and more in the direction of high power, and the high heat brought by high power LED is an important factor that plagues the popularization of LED. If the LED works at high temperature for a long time, its lifespan will be greatly shortened, which will affect the exertion of its advantages, and even cause the phenomenon of dead lights, which will lead to the scrapping of lamps. [0003] Therefore, it is necessary to protect the LED lamps. When the temperature exceeds the set temperature, generally 70 degrees Celsius, protection is required. At p...
Claims
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IPC IPC(8): H05B37/02F21S2/00F21V23/00F21V29/67F21Y115/10
Inventor 鲁显刚
Owner 深圳市冰夏科技有限公司