CN203147709U - Intelligent LED lamp heat dissipation device - Google Patents

Abstract

An intelligent LED light heat dissipation device, comprising a lampshade (1) and a radiator (4); and the radiator (4) is installed above the lampshade (1), and a temperature sensor (3) is arranged inside the lampshade (1). The signal output end of the temperature sensor (3) is connected to the control circuit (5), and the output end of the control circuit (5) is connected to the fan (6); the fan (6) is fixed above the radiator (4), and the The control circuit (5) is installed outside the radiator, and the temperature sensor (3), control circuit (5) and fan (6) are uniformly powered by the power circuit (P). The beneficial effect of the utility model is: the volume is small and exquisite, the structure is simple, and the LED lamp that can carry out intelligent heat dissipation control through the real-time monitoring of the chip temperature of the LED lamp, the speed of the fan rotation is changed according to the measured temperature, and the temperature of the LED lamp is avoided. When it exceeds the normal range, the fan rotates without power, which saves a lot of energy.

Description

An intelligent LED lamp cooling device

technical field

The utility model relates to an illuminating device, in particular to an intelligent LED lamp cooling device. the

Background technique

With the improvement of LED performance and the reduction of cost, lighting products using LED as light source have achieved rapid development, and have gradually replaced traditional lighting products and are used in some indoor and outdoor lighting places. In traditional lighting products, incandescent bulbs are the most commonly used general-purpose light source. Since the light efficiency of incandescent light bulbs is very low, only about 15lm/W, replacing incandescent light bulbs with LED light bulbs will have significant energy-saving advantages. the

However, a problem with LED itself is that the luminous efficiency of its lamps is greatly affected by the junction temperature of the chip. A higher chip junction temperature will lead to a significant decrease in luminous efficiency and will affect the service life of the LED bulb. Therefore, solving the heat dissipation problem of the LED light bulb is very important for improving the performance of the LED light bulb. Because traditional light bulbs rely on the high temperature radiation of the filament itself to achieve light, there is no need for heat dissipation. As a result, when replacing traditional light bulbs with LED light bulbs, the size of the traditional light bulbs is limited, resulting in less available heat dissipation space in the LED light bulbs. the

Not only that, with the widespread use of LED lamps, it is generally necessary to concentrate multiple power LED lamps on one lamp for use. Therefore, the heat dissipation of LED lamps has become a traditional Chinese medicine factor that affects the use status and life of LED lamps, especially for high-power For LED lamps, the heat dissipation problem has affected a wide range of applications and is a technical bottleneck. Most of the existing LED lighting lamps are passive heat dissipation, that is, heat dissipation is carried out through the heat sink of the radiator or similar devices. In order to improve the heat dissipation effect, it is necessary to increase the heat dissipation area as much as possible, which leads to the general appearance of the existing LED lamps. The heat dissipation mechanism is complicated, and its heat dissipation effect is not satisfactory. the

The announcement number CN201507898U discloses a radiator and an LED lamp with a fan. The LED lamp with a fan is simple in structure, small in size, and has a good heat dissipation effect and a long service life. However, this utility model cannot measure the temperature of the LED lamp chip. To achieve intelligent cooling of the temperature of the chip of the LED lamp consumes a lot of unnecessary energy. the

It can be seen that the disadvantages of the prior art are: large volume, complex heat dissipation mechanism, poor heat dissipation effect or inability to judge temperature, and cannot achieve optimal heat dissipation effect. the

Utility model content

The purpose of the utility model is to provide an intelligent LED lamp cooling device with small size and simple structure, which can carry out intelligent heat dissipation control through real-time monitoring of the chip temperature of the LED lamp. the

In order to achieve the above purpose, the utility model adopts an intelligent LED lamp cooling device, and the technical scheme is as follows:

An intelligent LED lamp cooling device, the key of which is: comprising a lampshade, a radiator, and the radiator is installed above the lampshade, a temperature sensor is arranged inside the lampshade, the signal output end of the temperature sensor is connected to a control circuit, and the control circuit The output end of the circuit is connected with the fan; the fan is fixed above the radiator, and the control circuit is installed outside the radiator. The temperature sensor, the control circuit and the fan are all powered by the power circuit. the

The temperature sensor detects the temperature in the LED lampshade, transmits the temperature detection result to the control circuit for analysis, and controls the rotation speed of the fan according to the measured temperature. the

The control circuit includes a microcontroller, the signal input terminal of the microcontroller is connected to the temperature sensor, the control terminal of the microcontroller is connected to the power supply circuit through a pull-up resistor, and the control terminal of the microcontroller is also connected to the first The base of the triode is connected, the emitter of the first triode is grounded, the collector is connected to the base of the second triode, the emitter of the second triode is grounded after the fan, and the second A capacitor is connected between the emitter of the triode and the ground, and the collector of the second triode is connected to the power circuit. the

Under normal working conditions, the temperature sensor sends temperature data to the microcontroller, and compares the input data. When the detected temperature is higher than the set value, the signal output terminal of the microcontroller outputs a pulse signal to the first three-pole At this time, the base of the first triode is at a high level, the first triode is on, the base of the second triode is at a low level, the second triode is off, and the fan is powered off; the first three The base of the transistor is at a low level, the first transistor is cut off, the base of the second transistor is at a high level, the second transistor is turned on, and the fan is powered on;

As the temperature sensor changes the temperature detection value of the LED bulb, the microcontroller adjusts the duty cycle of the high level of the output pulse voltage. The higher the temperature, the longer the low-level power supply time of the first triode base, the longer the fan power-on time, and the fan speed is increased. The capacitor smoothes the operating voltage of the fan. With the change control of the duty ratio of the second triode, the frequency conversion speed regulation of the fan is realized. the

The beneficial effect of the utility model is: the volume is small and exquisite, the structure is simple, and the LED lamp that can carry out intelligent heat dissipation control through the real-time monitoring of the chip temperature of the LED lamp, the speed of the fan rotation is changed according to the measured temperature, and the temperature of the LED lamp is avoided. When it exceeds the normal range, the fan rotates without power, which saves a lot of energy. the

Description of drawings

Fig. 1 is the overall structure schematic diagram of the present utility model. the

Figure 2 is the wiring diagram of the control circuit. the

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is further described:

As shown in Figure 1: a kind of intelligent LED light heat dissipation device, comprises lampshade 1, radiator 4, and radiator 4 is installed on the top of lampshade 1, and described lampshade 1 is provided with a temperature sensor 3, and the signal output of this temperature sensor 3 terminal is connected with the control circuit 5, and the output terminal of the control circuit 5 is connected with the fan 6; the fan 6 is fixed above the radiator 4, and the control circuit 5 is installed outside the radiator. The temperature sensor 3 , the control circuit 5 and the fan 6 are all powered by the power circuit P. the

The temperature sensor 3 transmits the temperature detection result to the control circuit 5 for analysis by detecting the temperature in the LED lampshade, and controls the rotation speed of the fan according to the measured temperature. the

As shown in Figure 2, the microcontroller 4 is included in the control circuit 5, the signal input terminal of the microcontroller 4 is connected to the temperature sensor 3, and the control terminal of the microcontroller 4 is connected to the power supply circuit P through the pull-up resistor R5. connected, the control terminal of the microcontroller 4 is also connected to the base of the first transistor Q1, the emitter of the first transistor Q1 is grounded, and the collector is connected to the base of the second transistor Q2, the The emitter string fan 6 of the second triode Q2 is connected to the ground, and a capacitor C is connected between the emitter of the second triode Q2 and the ground, and the collector of the second triode Q2 is connected to the power circuit P. the

Under normal working conditions, the temperature sensor 3 sends temperature data to the microcontroller 4, and compares the input data. When the detected temperature is higher than the set value, the signal output terminal of the microcontroller 4 outputs a pulse signal to the first The base of a triode Q1, at this time the base of the first triode Q1 is at a high level, the first triode Q1 is turned on, the base of the second triode Q2 is at a low level, and the second triode Q2 is turned off , the fan 6 loses power; the base of the first triode Q1 is extremely low, the first triode Q1 is cut off, the base of the second triode Q2 is at a high level, the second triode Q2 is turned on, and the fan 6 is electricity;

As the temperature sensor 3 detects changes in the temperature of the LED bulb, the microcontroller 4 adjusts the duty ratio of the high level of the output pulse voltage. The higher the temperature, the longer the power supply time for the base of the first transistor Q1 at low level,

The longer the power-on time of the fan 6 is, the higher the speed of the fan 6 is. The capacitor C smoothes the working voltage of the fan 6 . With the change control of the duty ratio of the second triode Q2, the frequency conversion speed regulation of the fan 6 is realized, and the intelligent heat dissipation device can adjust the intensity of heat dissipation according to the temperature of the LED lamp, so as to achieve the purpose of energy saving. the

Claims (3)

1. intelligent LED heat sink for lamp, comprise lampshade (1), radiator (4), and radiator (4) is installed on lampshade (1) top, it is characterized in that: be provided with a temperature sensor (3) in the described lampshade (1), the signal output part of this temperature sensor (3) is connected with control circuit (5), and the output of described control circuit (5) is connected with fan (6); Described fan (6) is fixed on radiator (4) top, and described control circuit (5) is installed on the radiator outside.

2. a kind of intelligent LED heat sink for lamp according to claim 1 is characterized in that: described temperature sensor (3), control circuit (5) and fan (6) are unified is powered by power circuit (P).

3. a kind of intelligent LED heat sink for lamp according to claim 2, it is characterized in that: comprise microcontroller (4) in the described control circuit (5), the signal input part of this microcontroller (4) connects described temperature sensor (3), the control end of microcontroller (4) is connected with power circuit (P) through pull-up resistor (R5), the control end of this microcontroller (4) also is connected with the base stage of first triode (Q1), the grounded emitter of this first triode (Q1), colelctor electrode connects the base stage of second triode (Q2), emitter stage string fan (6) the back ground connection of described second triode (Q2), be connected to electric capacity (C) between the emitter stage of described second triode (Q2) and the ground, this second triode (Q2) colelctor electrode connects power circuit (P).

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