As an important part of the air conditioning system, the automobile air conditioner air outlet duct can ensure the designed flow rate when the air conditioner is running inside and maintain the stable operation of the air conditioner.Therefore, people have high requirements for its sealing properties. If its sealing conditions are not good, it will easily cause water vapor to leak out during transportation inside the air outlet duct of the automobile air conditioner, causing the air conditioner to lose stability.Therefore, manufacturers often conduct sealing testing on air conditioners when they are produced and assembled. However, conventional sealing testing cannot correctly detect its sealing. Hirays has also done in-depth research on the sealing testing of automobile air conditioning outlet ducts. This time we will share a testing case of automobile air conditioning outlet ducts for your reference.
1. Appearance display of automobile air conditioner air outlet duct
What was tested this time was a common car air conditioner air outlet duct. The whole is an irregular polygon, and the outside is wrapped with black waterproof material. One end of the pipe is a connected exhaust fan, with obvious butt gaps, and the other end is two separate pipes with an irregular convex shape.
Car air conditioning outlet duct
2. Breakthrough in the detection of automobile air conditioner air outlet ducts and demonstration of the detection process
We helped the customer develop a tooling fixture for the automotive air-conditioning air outlet duct. This time, the customer requested to use the flow test method to test the automotive air-conditioning air outlet duct. Hirays Technology helped the customer develop the following testing plan.
Car air conditioner air outlet duct sealing testing mold
Since the exhaust pipe is empty inside and the interface is closed, we can fill the air outlet at the other end with gas and judge its sealing performance by changing the internal air pressure.
So we designed two air pipes for this test, one is to inject air pressure into the car air conditioning pipe, and the other is used to sense the internal pressure of the car air conditioning outlet pipe.When the instrument is started, the instrument will automatically inflate the air into the exhaust duct of the car air conditioner. At the same time, the air pressure of the instrument will slowly rise. When the air pressure reaches the set value, the interior of the air duct of the car air conditioner will be in a constant state. At this time, the induction line will determine the flow value to detect whether the flow of the air duct meets the standard.
Car air conditioner air outlet duct sealing tester
3. Display and parameter table of automobile air conditioner air outlet duct sealing tester
1. High-sensitivity pressure sensing and adjustment unit, combined with advanced differential pressure software algorithm, the minimum resolution can reach 0.1Pa. This algorithm has obtained a national patent.
2. Patented technology independently developed by Hirays,"IVT pneumatic sealing valve island", greatly improving the test accuracy, ensuring the stability of the instrument, and the inflation speed is also greatly improved.
3. Multiple test functions: The instrument integrates two pressure forms, positive and negative, and 8 test methods: two pressure forms and five test methods can be programmed into more than 20 test functions.
4. It has more than 200 groups of subroutines. Each group of subroutines can be programmed independently, single selected and combined to meet various complex testing requirements.
5. Full-touch large-screen intelligent operating system, graphical UI design based on the detection process, the operation interface is simple and clear, easy to teach and learn.
6. A variety of pressure adjustment components and ranges are optional, with a wide air pressure range (-80KPA&-1MPa) optional.The optional electronic pressure regulating valve can realize multiple sets of pressure sequential tests.
7. Multiple communication interfaces: built-in RS232 serial port, RJ45 network port, USB communication interface, LTP external I/O control port, supporting multiple communication protocols.
8. Optional barcode scanning function and printer are available to facilitate product data management and quality traceability. The instrument history record can reach up to 200,000 items and can be exported to the computer in batches.
9. The standard volume identification function can automatically identify the volume of the sample to be tested, and measure and judge the leakage rate in a volumetric manner.
10. Ultra-high stability and ease of use have passed the rigorous test of the market.
11. A variety of accessories are available, including inflatable bypass, quick connector, and standard leak hole. At the same time, the instrument supports third-party calibration and can issue a calibration report.
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