Light engine heat radiation parameter test device and test method

Abstract

The invention discloses a light engine heat radiation parameter test device and test method; the light engine heat radiation parameter test device comprises a sealed semispherical cavity, a radiator arranged in the center of the cavity, temperature sensors uniformly arranged on an inner wall of the cavity, two power meters respectively connected with a temperature heater and a to be tested light engine, and a voltage meter connected with a heat flow meter; the heat flow meter and the temperature heater are arranged on an outer side face of the radiator. A real work condition of the light engine is simulated and influences against environment temperature by convection and radiation are fully considered, so the light engine radiation parameters can be accurately measured and calculated, and influence against heat distribution by the sealed space is mastered, thus providing evidences for a designer and developer to analyze product heat radiation characteristics, and satisfying comparison test demands of different light engine heat radiation parameters under same power.

Description

technical field [0001] The invention relates to a test device, in particular to a device and a test method for testing the distribution and variation of heat dissipation parameters of light engines such as LEDs during use, and belongs to the field of lamp test equipment. Background technique [0002] Due to the lack of standardized and unified optical, mechanical, electrical, and thermal interfaces in the LED industry, as well as the uneven development of equipment and facilities, work foundations, and technical levels of various enterprises, there are many types of LED lighting light engines on the market, with different performances and poor interchangeability. Such shortcomings have brought serious impact and challenges to the development of the entire industry. [0003] In recent years, ZHAGA, an alliance association composed of the world's top LED manufacturers, has released a set of LED light engine standards, which cover the main standards of physical size, optics, el...

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Problems solved by technology

This method is widely used in other types of products, but when this method is used to measure the heat dissipation efficiency of LED lighting products, the high-temperature environment in which it is located makes the heat dissipation efficiency of the heat sink device no longer a key factor in determining the reliability of the product, and directly affects the reliability of the product. Accuracy of this type of product testing

In addition, thermocouples and other instruments are used to directly measure the temperature of various points on the product when the lamp is lit, so as to obtain the temperature of the radiator, the back of the light-emitting module, and the light-emitting surface when the product is working, so as to judge the heat dissipation efficiency. Uniformity, this method cannot accurately obtain parameters such as product heat dissipation power, and there is no way to know the subsequent heat distribution of the product in space, and the test results are severely limited

There is another method that is used, which is to use software simulation to simulate and calculate the heat dissipation power, temperature of each point and space heat distribution of the product, to consider the influence of various factors on the heat dissipation process to the greatest extent, to simulate and reproduce the lighting process, and its design Although the idea and implementation method are simple and convenient, due to the complexity of the simulation process and temperature changes, the simulation data deviates greatly from the actual effect and the accuracy is poor

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