Air tightness detection device with self-leakage and internal volume influence correction function and detection method thereof

Abstract

The invention provides an air tightness detection device with a self-leakage and internal volume influence correction function and a detection method thereof, and belongs to the technical field of airtightness detection. The airtightness detection device with the self-leakage and internal volume influence correction function is characterized by comprising a fluid source, a control unit A, a metering unit, a control unit B and a boundary zone valve which are connected in sequence, wherein a flow bypass valve is connected between the control unit A and the control unit B, the control unit A controls operation of the metering unit, the control unit B, the boundary area valve and the flow bypass valve, and the control unit B comprises one or more valves. The device is advantaged in that dataobtained is used for correcting leakage data of a detected object, and whether the current leakage amount is suitable for leakage detection of the to-be-detected object or not is evaluated, componentresources required are reduced, functions are increased, cost is reduced, and the size is reduced.

Description

technical field [0001] The invention belongs to the technical field of air-tightness detection, and in particular relates to an air-tightness detection device with the function of correcting the influence of self-leakage and internal volume and a detection method thereof. Background technique [0002] For the detection of airtightness, especially for the airtightness of the fuel cell field including the airtightness of the seal and the airtightness of the stack components such as the electrode plate, not only the leakage of the measured object must be considered, but also the test device itself must be calibrated leak. Since the detection equipment is not absolutely sealed, there will always be a certain leakage, which will affect the measurement accuracy of the leakage of the target to varying degrees. Therefore, it is necessary to detect the leakage of the detection device itself, so as to correct the leakage of the object to be tested. At the same time, the leakage of t...

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Problems solved by technology

[0004] A small amount of leakage in the detection device itself may not be found immediately. If you rely on manual detection, it will be time-consuming, laborious and inconvenient

Moreover, due to the complex structure of the test device itself, or the combined factors such as long-term use or movement, vibration, and seal failure, the leakage of the test device may also increase occasionally or slowly.

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