Thermal shock test chamber

Thermal shock test chamberEquipment working principle: This thermal shock test equipment is designed according to the thermal shock test provisions of Article 23.4.6.2 of GB3836.1-2000. A water pump is used to spray the test water through a nozzle with a diameter of 1mm onto the high temperature point on the transparent cover or glass surface of the lamp to assess whether the transparent cover and glass of the lamp are broken.

1、 Technical parameters

1. Temperature range: Lamp 40 ℃, glass RT+10 ℃~150 ℃

2. Temperature uniformity: ± 2.0 ℃ (with circulating air)

3. Temperature fluctuation: ± 0.5 ℃

4. Temperature deviation: ± 2.0 ℃

5. Heating rate: 1.0-3.0 ℃/min

6. Water temperature range: equipped with a cold water device, controlling the water temperature to 10 ℃

7. Temperature measurement system: Four sets of temperature sensors are reserved inside the box, and the instrument display is connected outside the box

8. Test time: Both the test time and water spraying time can be controlled and run automatically

9. Number of consecutive operating cycles: (1-200) adjustable and adjustable

10. Sample fixture: Made of aluminum profiles, the thinking space sample fixture is suitable for various shapes of lamps

11. Test bench area: ≥ φ 50cm

12. Test bench load capacity: ≥ 50kg

13. Test bench height adjustment: ≥ 20cm

2、 Test box body structure

1. The equipment is controlled to maintain a constant temperature of 150 ℃. Generally, the test requires a temperature of 40 ℃ -150 ℃. After the temperature stabilizes, the light is turned on, and the surface of the lamp will heat up. After the surface temperature of the lamp stabilizes, water will be sprayed on the lamp to check if it will burst.

2. In the process of air convection with the box, in order to make the temperature inside the box as uniform as possible, the left and right air inlets and outlets of the box are designed in a horn shape, and the left and right air outlets are equipped with porous buffer air plates. Design a small chiller with a controlled water temperature of 10 ℃, using a small water pump and a nozzle installed inside the box, facing the lamp directly at a distance according to customer requirements. After the surface temperature of the lamp stabilizes, it will automatically start spraying water onto the lamp.

3. Design a heating system for the equipment, with four temperature detection systems corresponding to four temperature instruments. The sensors are movable and can be fixed at any position on the surface of the lamp. After the temperature stabilizes at the specified value, the instrument sends a signal to command the water pump to spray water. The spraying time is controlled by a set of time relays.

4. Design a turntable that can rotate 360 ° with a speed of 1 revolution per minute. Install glass and lighting fixtures on the turntable for easy testing of glass and lighting fixtures.

IIIThermal shock test chamberControl system:

1. The temperature and humidity control instrument adopts a "7.0-inch" large screen - programmable microcomputer PID control SSR output operation, with a large screen, simple screen operation, and easy program editing;

2. Temperature display accuracy: 0.01 ℃;

3. Control method: Thermal balance temperature and humidity control method, all electrical appliances use (Chint) series products;

4. Equipped with automatic calculation function, it can immediately correct the temperature and humidity change conditions, making temperature and humidity control more stable;

5. The controller operation interface is available in both Chinese and English, and the real-time operation curve chart can be displayed on the screen with 12 sets of programs, each consisting of 10 segments, with a maximum time setting of 99 hours and 59 minutes for each segment; The controller has a screen lock function to avoid manual touch and shutdown;

6. Equipped with RS-232 or RS-485 remote communication interface, it can be programmed on a computer to monitor the testing process and perform functions such as automatic power on/off;