Device and method for air leakage self-inspection and object to be tested for air leakage detection

Abstract

The invention provides an airtightness detection device with the function of correcting the influence of its own leakage and internal volume and a detection method thereof, belonging to the technical field of airtightness detection. The main technical solution is as follows: an air tightness detection device with the function of correcting its own leakage and the influence of internal volume, including a fluid source, a control unit A, a metering unit, a control unit B, and a boundary valve connected in sequence, and the control unit A flow bypass valve is connected between A and control unit B; the control unit A controls the operation of the metering unit, control unit B, boundary valve, and flow bypass valve, and the control unit B includes one or more valves . The data obtained by the detection device of the present invention is used for the correction of leakage data of the measured object, and also includes evaluating whether the current leakage amount is suitable for the leakage detection of the measured object. The invention requires less component resources, increased functions, reduced costs, and reduced volume.

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...

AI Technical Summary

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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