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Parameter display of air tightness detector for fan

Fan depends on the input mechanical energy and improve the gas pressure and discharge gas. It is a kind of driven fluid machinery. It is used for cooling and ventilation of air conditioning equipment and household electrical equipment. As a necessary ventilation equipment, its safety and stability are very important. If the air tightness of the fan is not good, it will lead to the fan failure. In order to use it safely, people often test its air tightness.

Hiris technology has also done a lot of research on the air tightness detection of fans. While solving many detection problems, hiris's air tightness detector has also been used in the production line. This time we will share a fan waterproof test case for your reference.

Air tightness detector of fan

1、 Air tightness test requirements of fans

The shape of the fan is special, and the shell material with strong water resistance is used for casting as a whole. The rear end is used to connect the rotary valve of the rotary fan, while the front end is used as the interface to connect with other parts, with a special hollow.

For the air tightness test of the fan, two points need to be overcome: the nondestructive test of the product and the accuracy of the results. As the overall shape of the fan is relatively special, it is difficult to fix it when testing, so it needs to use a special mold to fix it, and adopt indirect testing method.

2、 Air tightness test process of fan

The detection of the fan needs to be divided into two parts, one is the flow detection of the rotary valve, the other is the air tightness detection of the whole shell of the fan.

Air tightness test mold display of fan

Air tightness test details of fans

2. According to the testing requirements, Harris technology has developed a special mold, and the shape of the mold is completely made according to the shape of the fan. The lower part is a special groove which can be used to place the fan rotary valve. The rubber ring is attached to the surface of the groove. When the fan is placed, the rotary valve can be better stuck in the groove. The lower part of the groove is integrated with the transmission pipeline connecting the detector, which makes the detection more convenient; The surface of the fan has a fully formed convex shape, while the surface of the other end of the mold has a special groove for clamping, which corresponds to the convex shape of the fan.

Air tightness test details of fans

3. Because this test needs two groups of data, we also added two pressure regulating valves on the tester, which can debug two groups of different test parts. During the detection, the upper mold will block the fan as a whole and fix it on the lower mold. The detector will send gas to the rotary valve through the pipe under the mold, and the detection is completed; Switch another group of detection mode, the gas channel originally connected with the groove of the rotary valve is closed, and the gas is automatically delivered to the outlet of the other end of the mold to detect the fan as a whole;

Display screen of air tightness detector for fan

4. If the fan is not sealed and air leakage occurs, the leakage value in the instrument will be larger and larger, and the pressure value will drop. At this time, it can determine whether the fan is leaking, and the instrument test results will also show ng, which means that the air tightness test fails. If the tested fan does not leak, the gas in the tooling die will be in a constant state after inflation, the pressure value and leakage value displayed on the instrument are also stable, and the test result of the instrument will display "OK", indicating that the air tightness test has passed.

threeParameter display of air tightness detector of fan

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