With the advancement and development of science and technology, many products now have increasingly higher requirements for waterproofing and sealing, and the efficiency of traditional water inspection hasNot satisfiedEfficient production rhythm.

Current mainstream waterproof testing methodsyesAir tightness testing(compressed air).

Its principle is that the product cavity is filled with gas at a certain pressure. After reaching the set pressure value, the gas supply is cut off. After the gas pressure is stabilized for a period of time, the pressure sensor monitors the attenuation of the pressure. If the attenuation exceeds the judgment threshold, the product is judged to be leaking.

picture1-1 The leakage point machine is soaking in water. The product in the picture is leaking.

So how do we need to set the parameters of the air tightness detector so that the air tightness detector can be judged as a qualified product and will not leak when actually soaked in water?

we need to knowProtection level，It adopts the International Electrotechnical Commission (The IPXX level standard recommended by IEC) has different levels in different installation locations.For details, please refer to the table below. In the grade standard, XX is a two-digit number. The first digit indicates the product's protection level against solids, and the second digit indicates the protection level against liquids.

The solid protection level isThere are 7 levels, represented by 0-6; there are 9 levels of liquid protection, represented by 0-8 respectively.

picture1-2 IP level table

When performing air tightness testing, we can use the formulaWaterproof levelDetermine the corresponding air pressure.

Conversion formula:P=ρgh，P is the pressure, ρ is the density of the liquid, g is the acceleration due to gravity, and h is the height of the water depth.After conversion of the formula, the following conclusions can be drawn:

Products inThe pressure experienced by 1m water depth≈10kpa

With the formula, you can calculate the air pressure required for the test.

Figure 1-3 Hirays air tightness testing equipment

first step: Put the assembled product into the air tightness testing instrument of the preliminary setting program to test and record"Test pressure" and "Leakage value";

Figure 1-4 Hai RuiSi HE Leak Point Detection Machine

Step 2: Put the tested products intoThe HE leakage point detector performs the test again, observes whether there is actual leakage, and records the phenomenon and results;

Figure 1-5 Engineer is analyzing data

Step 3: Analyze the air tightness testing data and water immersion test data, and correct the program parameters of the air tightness testing equipment;

Figure 1-6 Large batch inspection

Step 4: Start mass testing, and then gradually improve the process and testing procedures.

Compared with traditional water testing, air tightness testing is easier to implement batch testing, and accurate data can be obtained, which can be achieved after modification.Automated detection。

Hiraysi has been focusing on the research and development of air tightness detectors for thirteen years, and is committed to helping customers find out whether products are leaking through air tightness testing instruments and improving factory quality;“Use professional technology to continuously create value for customers"As our own responsibility, we will comprehensively build an air tightness detector that meets the requirements of modern development.