Use high temperature test chamber to test the temperature resistance of LED light

For now, there are more and more places where we use LED lights in our lives. LED is a light-emitting diode semiconductor device. Its working principle is to convert electric energy into light energy, which has good seismic performance, long service life, environmental protection and other characteristics.

LED can emit red, yellow, blue, green, green, orange, purple and white light directly. So it is widely used. Although LED lamps have been promoting the use of cold light sources, LED bulbs still generate heat. If it is at high temperature for a long time, its service life will be reduced. For some hot places, in order to improve the service life, it is necessary to use a high temperature test chamber for repeated tests to improve its heat resistance.

In LED bulbs, only 20% – 30% of the electric energy is converted into light after being powered on, and the remaining 70% is converted into heat energy. If it stays at high temperature for a long time, the heat dissipation performance will deteriorate, which will rapidly increase the temperature of LED chips and shorten the service life of LED lamps. Through various tests in high temperature test chamber, it can be concluded that LED lamps have good stability and will not explode in high temperature environment for a long time. However, if you use inferior drive circuit, its drive circuit will explode, so in consideration of personal safety, please open your eyes after purchase to prevent the purchase of counterfeit and shoddy products.

There are several points to save the power of the high temperature test chamber:
1. Location: Place the high temperature test chamber in a cool and ventilated place, away from the dry environment. When placing the test chamber, appropriate space shall be reserved on the left and right sides of its top and at the back for heat dissipation. Due to the high ambient temperature around the test chamber, the power consumption of the test chamber increases.

2. Regularly check the sealing performance of the sealing strip of the high temperature box. If the sealing strip is deformed, it will affect the sealing degree, cause air conditioning leakage and increase power consumption. If the deformation is serious, repair and replace it in time.

3. Every time the door is opened, the air conditioner will be exposed When the hot air enters, run the compression device again. When sampling, try to reduce the number and time of opening the door. The opening and closing action should be fast and the opening angle should be small.

4. Always pay attention to cleaning the high temperature test chamber, and clean the surface of the equipment every two to three months. The more dust, the worse the heat dissipation effect and the greater the power consumption. When cleaning, cut off the power supply and wipe it with a wet cloth.

How does the high temperature test chamber dissipate heat？
1. The temperature field change in the high temperature test box is affected by the aging circuit power and heat dissipation capacity (wind speed). The device not only controls the power of the circuit, but also changes the layout of the circuit. The lower layer should fill the circuit as much as possible, and gradually reduce the power of the circuit from the lower layer to form a power gradient, which is consistent with the wind speed of the test chamber, to achieve the purpose of heat dissipation.

2. The test chamber adopts electric heating high temperature drying test chamber, and the air source is from the bottom. Due to the bearing plate and aging plate of the test chamber, the wind speed gradually decreases from bottom to top. According to the characteristics of the wind speed of the test chamber, the placement direction of the aging plate can be consistent with the wind direction of the test chamber, increase the ventilation area, reduce the wind speed barrier, and enhance the heat dissipation function of the high temperature test chamber.

3. According to the improvement measures, combined with the DC/DC power supply of the power device as the test object, the temperature is set at 80 ℃, and the test circuit power 65W (1) gradually increases to 5200W (8). The circuit power 520W of the high temperature test chamber is 5.6 ℃ higher than the set temperature, meeting the requirements of the national standard (8) ℃ or 8%).

Temperature Humidity Chamber | Thermal Chamber | Climate Chamber is according to IEC60068-2-1 (GB/T2423.1) and IEC60068-2-2 (GB/T2423.2), IEC60068-2-78, IEC60598-1, GB/T2423.17, GB/T5170.2, GB/T5170.5. The climate chamber is used to test the CFL/LED which meets IES LM-80-08, electricity products, automative cars, home appications and mobiles.

Lisun Instruments Limited was found by LISUN GROUP in 2003. LISUN quality system has been strictly certified by ISO9001:2015. As a CIE Membership, LISUN products are designed based on CIE, IEC and other international or national standards. All products passed CE certificate and authenticated by the third party lab.

Our main products are Goniophotometer, Integrating Sphere, Spectroradiometer, Surge Generator, ESD Simulator Guns, EMI Receiver, EMC Test Equipment, Electrical Safety Tester, Environmental Chamber, Temperature Chamber, Climate Chamber, Thermal Chamber, Salt Spray Test, Dust Test Chamber, Waterproof Test, RoHS Test (EDXRF), Glow Wire Test and Needle Flame Test.

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