Calibration apparatus and method for air tightness testing equipment

Abstract

The application discloses a kind of calibration device and method of airtight detection equipment, belong to hydrogen fuel cell airtightness detection technical field.The calibration device of airtight detection equipment includes first ventilation module, second ventilation module and third ventilation module, and first ventilation module is equipped with hydrogen cavity and the first interface being communicated with hydrogen cavity;Second ventilation module is equipped with air cavity and the second interface being communicated with air cavity, and hydrogen cavity and air cavity are selectively connected;Third ventilation module is equipped with cooling water cavity and the third interface being communicated with cooling water cavity, and cooling water cavity is selectively communicated with hydrogen cavity and air cavity respectively.When airtight detection equipment needs to be used, it only needs to be connected first by making the calibration device of airtight detection equipment and airtight detection equipment to judge whether airtight detection equipment needs to be corrected, not only guarantee airtight detection equipment when measuring the airtightness of hydrogen fuel cell each time is always reliable, but also avoid needing to be detected by third party detection mechanism periodically.

Description

Technical Field

[0001] This application belongs to the field of hydrogen fuel cell air tightness testing technology, and particularly relates to a calibration device and method for air tightness testing equipment. Background Technology

[0002] Hydrogen fuel cell devices are devices that convert chemical energy into electrical energy. They are widely used due to their cleanliness, environmental friendliness, and high energy density. However, when hydrogen or air leaks into a hydrogen fuel cell, it not only affects its performance but also poses safety hazards due to the flammable nature of hydrogen. Therefore, regular leak testing of hydrogen fuel cells is typically required.

[0003] Currently, specialized airtightness testing equipment is typically used to test the airtightness of hydrogen fuel cells. However, after multiple tests, the airtightness of the testing equipment itself can deteriorate due to factors such as component movement, loose assembly, or prolonged use. If this equipment is not effectively and promptly calibrated, inaccurate testing of hydrogen fuel cells can occur, leading to economic losses. However, regularly having third-party testing agencies conduct tests on the airtightness testing equipment is not only time-consuming and labor-intensive, resulting in high labor costs, but also makes it difficult to accurately control the calibration requirements. Summary of the Invention

[0004] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes a calibration device and method for an airtightness testing device. When the airtightness testing device needs to be used, it is only necessary to first connect the calibration device to the airtightness testing device. By comparing the reference leakage amount with the actual leakage amount, it is quickly determined whether the airtightness testing device needs correction. This method is not only simple to operate, but also ensures the reliability of the airtightness testing device in every measurement of the airtightness of a hydrogen fuel cell, guaranteeing the accuracy of the test. It also avoids the need for periodic testing by a third-party testing agency, saving time and effort and reducing labor costs.

[0005] In a first aspect, this application provides a calibration device for an airtightness testing device, used for performing airtightness testing on the airtightness testing device, the calibration device comprising:

[0006] The first ventilation module is provided with a hydrogen chamber and a first interface communicating with the hydrogen chamber. The first interface is at least used to communicate with the hydrogen chamber detection interface of the airtightness detection device.

[0007] The second ventilation module is provided with an air cavity and a second interface communicating with the air cavity, and the hydrogen cavity is selectively communicated with the air cavity. The second interface is at least used to communicate with the cavity detection interface of the airtightness detection device.

[0008] The third ventilation module is provided with a cooling water cavity and a third interface communicating with the cooling water cavity. The cooling water cavity is selectively connected to the hydrogen cavity and the air cavity respectively. The third interface is at least used to communicate with the water cavity detection interface of the airtightness detection device.

[0009] According to the calibration device for the airtightness testing equipment of this application, when the airtightness testing equipment needs to be used, it is only necessary to first connect the calibration device to the airtightness testing equipment, and then quickly determine whether the airtightness testing equipment needs to be corrected by comparing the reference leakage amount and the actual leakage amount. This not only makes the operation simple, but also ensures that the airtightness testing equipment is always reliable when measuring the airtightness of hydrogen fuel cells, ensuring the accuracy of the test, and also avoids the need for periodic testing by third-party testing agencies, saving time and effort and reducing labor costs.

[0010] According to one embodiment of this application, it also includes:

[0011] A first pipeline, the two ends of which are respectively connected to the hydrogen chamber and the air chamber, and a first standard leak hole is provided on the first pipeline;

[0012] A first control valve is installed on the first pipeline to control the connection between the hydrogen chamber and the air chamber.

[0013] According to one embodiment of this application, the first standard leak is located on the first pipeline portion between the first control valve and the hydrogen chamber.

[0014] According to one embodiment of this application, it also includes:

[0015] The second pipeline has its two ends connected to the air cavity and the cooling water cavity, respectively, and a second standard leak hole is provided on the second pipeline.

[0016] The second control valve is installed on the second pipeline to control the connection between the air chamber and the cooling water chamber.

[0017] According to one embodiment of this application, the second standard leak is located on the second pipeline portion between the second control valve and the air chamber.

[0018] According to one embodiment of this application, it also includes:

[0019] The third pipeline has its two ends connected to the cooling water chamber and the hydrogen chamber, respectively, and a third standard leak hole is provided on the third pipeline.

[0020] A third control valve is installed on the third pipeline to control the connection between the cooling water chamber and the hydrogen chamber.

[0021] According to one embodiment of this application, the third standard leak is located on the third pipeline portion between the third control valve and the cooling water chamber.

[0022] According to one embodiment of this application, it also includes:

[0023] The housing contains the first ventilation module, the second ventilation module, and the third ventilation module, which are respectively installed inside the housing.

[0024] Secondly, this application provides a calibration method for an airtightness testing device, based on the calibration apparatus for the airtightness testing device described above, the calibration method for the airtightness testing device includes:

[0025] Obtain a reference leakage amount;

[0026] Connect the calibration device and the airtightness detection equipment to obtain the actual leakage amount;

[0027] The reference leakage amount and the actual leakage amount are compared to obtain a comparison value. If the comparison value is not within a preset range, it is determined that the airtightness detection device needs to be corrected.

[0028] According to the calibration method of the airtightness testing equipment in this application, when the airtightness testing equipment needs to be used, it is only necessary to first connect the calibration device of the airtightness testing equipment to the airtightness testing equipment, and then quickly determine whether the airtightness testing equipment needs to be corrected by comparing the reference leakage amount and the actual leakage amount. This method is not only simple to operate, but also ensures that the airtightness testing equipment is always reliable when measuring the airtightness of hydrogen fuel cells, ensuring the accuracy of the test. It also avoids the need for periodic testing by third-party testing agencies, accurately grasps the calibration cycle and time, saves time and effort, and reduces labor costs.

[0029] According to one embodiment of this application, the step of comparing the reference leakage amount and the actual leakage amount to obtain a comparison value further includes:

[0030] If the comparison value is within the preset range, it is determined that the airtightness testing device does not need to be corrected.

[0031] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0032] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0033] Figure 1 This is a schematic diagram of the structure of the calibration device for the airtightness testing equipment provided in the embodiments of this application;

[0034] Figure 2 This is a schematic flowchart of the calibration method for the airtightness testing equipment provided in the embodiments of this application.

[0035] Figure label:

[0036] 100. First ventilation module; 110. Hydrogen chamber; 120. First interface;

[0037] 200, Second ventilation module; 210, Air cavity; 220, Second interface;

[0038] 300. Third ventilation module; 310. Cooling water chamber; 320. Third interface;

[0039] 400, First pipeline; 410, First standard leak hole; 500, First control valve;

[0040] 600, Second pipeline; 610, Second standard leak hole; 700, Second control valve;

[0041] 800, Third pipeline; 810, Third standard leak hole; 900, Third control valve. Detailed Implementation

[0042] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0043] The following is for reference. Figure 1 The calibration device for an airtightness testing device provided in the embodiments of this application is described. The calibration device for the airtightness testing device includes a first ventilation module 100, a second ventilation module 200, and a third ventilation module 300.

[0044] The first ventilation module 100 includes a hydrogen chamber 110 and a first interface 120 communicating with the hydrogen chamber 110. The first interface 120 is at least used to communicate with the hydrogen chamber detection interface of an airtightness testing device. It should be noted that the size and shape of the hydrogen chamber 110 and the type of the first interface 120 can be designed according to actual needs, and this embodiment does not impose specific limitations on them.

[0045] The second ventilation module 200 includes an air cavity 210 and a second interface 220 communicating with the air cavity 210. The hydrogen cavity 110 is selectively connected to the air cavity 210. The second interface 220 is at least used to communicate with the cavity detection interface of an airtightness testing device. It should be noted that the size and shape of the air cavity 210 and the type of the second interface 220 can be designed according to actual needs, and this embodiment does not impose specific limitations on them.

[0046] The third ventilation module 300 includes a cooling water chamber 310 and a third interface 320 communicating with the cooling water chamber 310. The cooling water chamber 310 is selectively connected to the hydrogen chamber 110 and the air chamber 210, respectively. The third interface 320 is at least used to communicate with the water chamber detection interface of the airtightness testing equipment. It should be noted that the size and shape of the cooling water chamber 310 and the type of the third interface 320 can be designed according to actual needs, and this embodiment does not impose specific limitations on them.

[0047] Understandably, the steps for calibrating an airtightness testing device using its calibration device are as follows:

[0048] The calibration device of the airtightness testing equipment is tested by a third-party testing agency to determine the reference leakage amount. The reference leakage amount includes a first reference leakage amount, a second reference leakage amount, a third reference leakage amount, and a fourth reference leakage amount. The first reference leakage amount is the leakage amount of the calibration device of the airtightness testing equipment measured by the third-party testing agency when only the hydrogen chamber 110 and the air chamber 210 are connected. The second reference leakage amount is the leakage amount of the calibration device of the airtightness testing equipment measured by the third-party testing agency when only the air chamber 210 and the cooling water chamber 310 are connected. The third reference leakage amount is the leakage amount of the calibration device of the airtightness testing equipment measured by the third-party testing agency when only the hydrogen chamber 110 and the cooling water chamber 310 are connected. The fourth reference leakage amount is the leakage amount of the calibration device of the airtightness testing equipment measured by the third-party testing agency when the hydrogen chamber 110, the air chamber 210, and the cooling water chamber 310 are connected.

[0049] Connect the calibration device of the airtightness testing equipment to the airtightness testing equipment, that is, connect the hydrogen cavity testing interface of the airtightness testing equipment to the first interface 120, the cavity testing interface to the second interface 220, and the water cavity testing interface to the third interface 320.

[0050] The actual leakage amount is obtained, which includes the first actual leakage amount, the second actual leakage amount, the third actual leakage amount, and the fourth actual leakage amount. The first actual leakage amount is the leakage amount of the calibration device of the airtightness testing equipment measured by the airtightness testing equipment when only the hydrogen chamber 110 and the air chamber 210 are connected. The second actual leakage amount is the leakage amount of the calibration device of the airtightness testing equipment measured by the airtightness testing equipment when only the air chamber 210 and the cooling water chamber 310 are connected. The third actual leakage amount is the leakage amount of the calibration device of the airtightness testing equipment measured by the airtightness testing equipment when only the hydrogen chamber 110 and the cooling water chamber 310 are connected. The fourth actual leakage amount is the leakage amount of the calibration device of the airtightness testing equipment measured by the airtightness testing equipment when the hydrogen chamber 110, the air chamber 210, and the cooling water chamber 310 are connected.

[0051] A comparison value is obtained by comparing the reference leakage amount and the actual leakage amount, namely, comparing the first reference leakage amount and the first actual leakage amount to obtain the first comparison value, comparing the second reference leakage amount and the second actual leakage amount to obtain the second comparison value, comparing the third reference leakage amount and the third actual leakage amount to obtain the third comparison value, and comparing the fourth reference leakage amount and the fourth actual leakage amount to obtain the fourth comparison value.

[0052] The need for correction of the airtightness testing equipment is determined based on the comparison value. If the comparison value is outside the preset range, the airtightness testing equipment needs correction; if the comparison value is within the preset range, the airtightness testing equipment does not need correction. The preset ranges include a first preset range, a second preset range, a third preset range, and a fourth preset range. If the first comparison value is outside the first preset range, it indicates that the flow meter or corresponding pipeline and pipeline interface (including the hydrogen cavity detection interface) used by the airtightness testing equipment to measure the hydrogen pipeline of the hydrogen fuel cell is malfunctioning and needs correction. Similarly, if the second comparison value is outside the second preset range, it indicates that the flow meter or corresponding pipeline and pipeline interface (including the cavity detection interface) used by the airtightness testing equipment to measure the air pipeline of the hydrogen fuel cell is malfunctioning and needs correction. If the third comparison value is not within the third preset range, it is determined that the flow meter or the corresponding pipeline and pipeline interface (including the water cavity detection interface) used by the airtightness testing equipment to measure the coolant pipeline of the hydrogen fuel cell is abnormal and needs to be corrected. If the fourth comparison value is not within the fourth preset range, it is determined that the flow meter or the corresponding pipeline and pipeline interface (including the hydrogen cavity detection interface, air cavity detection interface and water cavity detection interface) used by the airtightness testing equipment to measure the main pipeline (the main pipeline includes the hydrogen pipeline, air pipeline and coolant pipeline) of the hydrogen fuel cell is abnormal and needs to be corrected.

[0053] It should be noted that correction includes, but is not limited to, hardware repair and parameter adjustment of the airtightness testing equipment. As long as the comparison value between the actual leakage amount and the reference leakage amount obtained by the airtightness testing equipment after correction is within the preset range, it can be said that the current airtightness testing equipment is accurate in measuring the airtightness of the hydrogen fuel cell.

[0054] According to the calibration device for the airtightness testing equipment provided in the embodiments of this application, when the airtightness testing equipment needs to be used, it is only necessary to first connect the calibration device to the airtightness testing equipment, and then quickly determine whether the airtightness testing equipment needs to be corrected by comparing the reference leakage amount and the actual leakage amount. This not only makes the operation simple, but also ensures that the airtightness testing equipment is always reliable when measuring the airtightness of hydrogen fuel cells, ensuring the accuracy of the test, and also avoids the need for periodic testing by third-party testing agencies, saving time and effort and reducing labor costs.

[0055] In some embodiments, such as Figure 1 As shown, the calibration device of the airtightness testing equipment also includes a first pipeline 400 and a first control valve 500. The two ends of the first pipeline 400 are respectively connected to the hydrogen chamber 110 and the air chamber 210, and a first standard leak hole 410 is provided on the first pipeline 400. The first control valve 500 is provided on the first pipeline 400 to control the connection between the hydrogen chamber 110 and the air chamber 210.

[0056] It is understood that the hydrogen chamber 110 and the air chamber 210 are connected through the first pipeline 400, and selectively connected through the first control valve 500. That is, when the first control valve 500 is open, the hydrogen chamber 110 and the air chamber 210 are connected, and when the first control valve 500 is closed, the hydrogen chamber 110 and the air chamber 210 are not connected. Simultaneously, by setting a first standard leak hole 410 in the first pipeline 400, the first standard leak rate value of the first standard leak hole 410 is compared with a first reference leak amount to evaluate the airtightness of the calibration device of the airtightness testing equipment itself.

[0057] In some embodiments, a first standard leak 410 is located on a portion of the first conduit 400 between the first control valve 500 and the hydrogen chamber 110. It is understood that because the first standard leak 410 is located between the first control valve 500 and the hydrogen chamber 110, the leakage amount of the portion of the first conduit 400 between the hydrogen chamber 110 and the first control valve 500 can be accurately obtained.

[0058] In some embodiments, the calibration device of the airtightness testing equipment further includes a second pipeline 600 and a second control valve 700. The two ends of the second pipeline 600 are respectively connected to the air chamber 210 and the cooling water chamber 310, and a second standard leak hole 610 is provided on the second pipeline 600. The second control valve 700 is provided on the second pipeline 600 for controlling the connection between the air chamber 210 and the cooling water chamber 310.

[0059] Understandably, the air chamber 210 and the cooling water chamber 310 are connected via the second pipe 600, and selectively connected via the second control valve 700. That is, when the second control valve 700 is open, the air chamber 210 and the cooling water chamber 310 are connected; when the second control valve 700 is closed, the air chamber 210 and the cooling water chamber 310 are not connected. Simultaneously, by providing a second standard leak hole 610 in the second pipe 600, the second standard leak rate value and the second reference leakage amount of the second standard leak hole 610 are compared to evaluate the airtightness of the calibration device itself in the airtightness testing equipment.

[0060] In some embodiments, the second standard leak 610 is located on a portion of the second conduit 600 between the second control valve 700 and the air chamber 210. It is understood that, since the second standard leak 610 is located between the second control valve 700 and the air chamber 210, the leakage amount of the portion of the second conduit 600 between the air chamber 210 and the second control valve 700 can be accurately obtained.

[0061] In some embodiments, the calibration device of the airtightness testing equipment further includes a third pipeline 800 and a third control valve 900. The two ends of the third pipeline 800 are respectively connected to the cooling water chamber 310 and the hydrogen chamber 110, and a third standard leak hole 810 is provided on the third pipeline 800. The third control valve 900 is provided on the third pipeline 800 to control the connection between the cooling water chamber 310 and the hydrogen chamber 110.

[0062] Understandably, the cooling water chamber 310 and the hydrogen chamber 110 are connected via the third pipeline 800, and selectively connected via the third control valve 900. That is, when the third control valve 900 is open, the cooling water chamber 310 and the hydrogen chamber 110 are connected; when the third control valve 900 is closed, the cooling water chamber 310 and the hydrogen chamber 110 are not connected. Simultaneously, by providing a third standard leak hole 810 in the third pipeline 800, the third standard leak rate value of the third standard leak hole 810 is compared with the third reference leak amount to evaluate the airtightness of the calibration device itself in the airtightness testing equipment.

[0063] In some embodiments, the third standard leak hole 810 is located on a portion of the third piping 800 between the third control valve 900 and the cooling water chamber 310. It is understood that, since the third standard leak hole 810 is located between the third control valve 900 and the cooling water chamber 310, the leakage amount of the portion of the third piping 800 between the cooling water chamber 310 and the third control valve 900 can be accurately obtained.

[0064] In some embodiments, the calibration device for the airtightness testing equipment further includes a housing, in which the first ventilation module 100, the second ventilation module 200, and the third ventilation module 300 are respectively installed. The housing is made of materials including, but not limited to, stainless steel, aluminum alloy, or titanium alloy.

[0065] It is understandable that by installing the first ventilation module 100, the second ventilation module 200, and the third ventilation module 300 inside the housing, and by extending one end of the first interface 120, one end of the second interface 220, and one end of the third interface 320 outside the housing to connect with the corresponding hydrogen cavity detection interface, air cavity detection interface, and water cavity detection interface, the structural stability and airtightness of the calibration device of the entire airtightness testing equipment are ensured as much as possible.

[0066] This application also provides a calibration method for an airtightness testing device, based on the above-described calibration apparatus for the airtightness testing device.

[0067] like Figure 2 As shown, the calibration method for the airtightness testing device includes steps S101, S102, and S103.

[0068] S101, Obtain the reference leakage amount.

[0069] Understandably, the reference leakage amount is obtained by testing the calibration device of the airtightness testing equipment through a third-party testing agency. That is, the reference leakage amount includes a first reference leakage amount, a second reference leakage amount, a third reference leakage amount, and a fourth reference leakage amount. The first reference leakage amount is the leakage amount of the calibration device of the airtightness testing equipment measured by a third-party testing agency when only the hydrogen chamber 110 and the air chamber 210 are connected. The second reference leakage amount is the leakage amount of the calibration device of the airtightness testing equipment measured by a third-party testing agency when only the air chamber 210 and the cooling water chamber 310 are connected. The third reference leakage amount is the leakage amount of the calibration device of the airtightness testing equipment measured by a third-party testing agency when only the hydrogen chamber 110 and the cooling water chamber 310 are connected. The fourth reference leakage amount is the leakage amount of the calibration device of the airtightness testing equipment measured by a third-party testing agency when the hydrogen chamber 110, the air chamber 210, and the cooling water chamber 310 are connected.

[0070] S102, Connect the calibration device and the airtightness testing equipment to obtain the actual leakage amount.

[0071] Understandably, the actual leakage is determined by connecting the calibration device of the airtightness testing equipment to the airtightness testing equipment. Specifically, the hydrogen chamber detection interface of the airtightness testing equipment is connected to the first interface 120, the air chamber detection interface is connected to the second interface 220, and the water chamber detection interface is connected to the third interface 320. The actual leakage includes a first actual leakage, a second actual leakage, a third actual leakage, and a fourth actual leakage. The first actual leakage is the leakage measured by the calibration device of the airtightness testing equipment when only the hydrogen chamber 110 and the air chamber 210 are connected. The leakage amount is as follows: the second actual leakage amount is the leakage amount of the calibration device of the air tightness testing equipment measured by the air tightness testing equipment when only the air chamber 210 and the cooling water chamber 310 are connected; the third actual leakage amount is the leakage amount of the calibration device of the air tightness testing equipment measured by the air tightness testing equipment when only the hydrogen chamber 110 and the cooling water chamber 310 are connected; and the fourth actual leakage amount is the leakage amount of the calibration device of the air tightness testing equipment measured by the air tightness testing equipment when the hydrogen chamber 110, the air chamber 210 and the cooling water chamber 310 are connected.

[0072] S103. Compare the reference leakage amount and the actual leakage amount to obtain a comparison value. If the comparison value is not within the preset range, it is determined that the airtightness detection equipment needs to be corrected.

[0073] It should be noted that the comparison values ​​include a first comparison value, a second comparison value, a third comparison value, and a fourth comparison value. The first comparison value is obtained by comparing the first reference leakage amount with the first actual leakage amount; the second comparison value is obtained by comparing the second reference leakage amount with the second actual leakage amount; the third comparison value is obtained by comparing the third reference leakage amount with the third actual leakage amount; and the fourth comparison value is obtained by comparing the fourth reference leakage amount with the fourth actual leakage amount.

[0074] It is understandable that the comparison value is used to determine whether the airtightness testing equipment needs to be corrected. The preset ranges include a first preset range, a second preset range, a third preset range, and a fourth preset range. If the first comparison value is not within the first preset range, it is determined that the flow meter or corresponding pipeline and pipeline interface (including the hydrogen cavity detection interface) used by the airtightness testing equipment to measure the hydrogen pipeline of the hydrogen fuel cell is abnormal and needs to be corrected. If the second comparison value is not within the second preset range, it is determined that the flow meter or corresponding pipeline and pipeline interface (including the cavity detection interface) used by the airtightness testing equipment to measure the air pipeline of the hydrogen fuel cell is abnormal and needs to be corrected. If the third comparison value is not within the third preset range, it is determined that the flow meter or corresponding pipeline and pipeline interface (including the water cavity detection interface) used by the airtightness testing equipment to measure the coolant pipeline of the hydrogen fuel cell is abnormal and needs to be corrected. If the fourth comparison value is not within the fourth preset range, it is determined that the flow meter or corresponding pipeline and pipeline interface (including the hydrogen cavity detection interface, the cavity detection interface, and the water cavity detection interface) used by the airtightness testing equipment to measure the main pipeline (including the hydrogen pipeline, the air pipeline, and the coolant pipeline) of the hydrogen fuel cell is abnormal and needs to be corrected.

[0075] It should be noted that the first preset range, the second preset range, the third preset range, and the fourth preset range may be completely the same or not completely the same. This embodiment does not impose specific restrictions on this.

[0076] According to the calibration method for the airtightness testing equipment provided in the embodiments of this application, when the airtightness testing equipment needs to be used, it is only necessary to first connect the calibration device of the airtightness testing equipment to the airtightness testing equipment, and then quickly determine whether the airtightness testing equipment needs to be corrected by comparing the reference leakage amount and the actual leakage amount. This method is not only simple to operate, but also ensures that the airtightness testing equipment is always reliable when measuring the airtightness of hydrogen fuel cells, ensuring the accuracy of the test. It also avoids the need for periodic testing by third-party testing agencies, accurately grasps the calibration cycle and time, saves time and effort, and reduces labor costs.

[0077] In some embodiments, after comparing the reference leakage amount and the actual leakage amount to obtain a comparison value in step S103, the method further includes:

[0078] If the comparison value is within the preset range, it is determined that the airtightness testing equipment does not need to be corrected.

[0079] In some embodiments, the actual leakage amount includes a first actual leakage amount, a second actual leakage amount, a third actual leakage amount, and a fourth actual leakage amount. In step S102, the calibration device connected to the airtightness detection device and the airtightness detection device are used to obtain the actual leakage amount, which includes steps S1021, S1022, S1023, S1024, and S1025.

[0080] S1021. Connect the hydrogen cavity detection interface of the airtightness testing equipment to the first interface 120, the cavity detection interface to the second interface 220, and the water cavity detection interface to the third interface 320.

[0081] S1022. Open the first control valve 500 and close the second control valve 700 and the third control valve 900. Obtain the first actual leakage amount based on the measured operating conditions. The first actual leakage amount includes the sum of the leakage values ​​of the third control valve 900, the first interface 120, the hydrogen chamber 110, the first standard leak hole 410, the first control valve 500, the second interface 220, the air chamber 210, the second standard leak hole 610, the second control valve 700, the first pipeline 400 and the second pipeline 600.

[0082] S1023. Open the second control valve 700 and close the first control valve 500 and the third control valve 900. Obtain the second actual leakage amount based on the measured operating conditions. The second actual leakage amount includes the sum of the leakage values ​​of the first control valve 500, the second interface 220, the air cavity 210, the second standard leak hole 610, the second control valve 700, the third interface 320, the cooling water cavity 310, the third standard leak hole 810, the third control valve 900, the second pipeline 600, and the third pipeline 800.

[0083] S1024. Open the third control valve 900 and close the first control valve 500 and the second control valve 700. Obtain the third actual leakage amount based on the measured operating conditions. The third actual leakage amount includes the sum of the leakage values ​​of the second control valve 700, the second interface 220, the cooling water cavity 310, the third interface 320, the third standard leak hole 810, the third control valve 900, the first pipeline 400 and the second pipeline 600.

[0084] S1025. Open the first control valve 500, the second control valve 700, and the third control valve 900. Based on the measured operating conditions, obtain the fourth actual leakage amount. The fourth actual leakage amount includes the leakage values ​​of the first interface 120, the hydrogen chamber 110, the first standard leak hole 410, the first control valve 500, the second interface 220, the air chamber 210, the second control leak hole, the second control valve 700, the third interface 320, the cooling water chamber 310, the third standard leak hole 810, the third control valve 900, the first pipeline 400, the second pipeline 600, and the second pipeline 600.

[0085] It should be noted that there is no specified order among S1022, S1023, S1024, and S1025, and they can be arbitrarily interchanged. This embodiment does not impose specific restrictions on this. Furthermore, one can either obtain the first comparison value, the second comparison value, the third comparison value, and the fourth comparison value first, and then determine whether each flow meter or corresponding pipeline and pipeline interface in the airtightness testing equipment needs correction, or obtain one of the first comparison value, the second comparison value, the third comparison value, and the fourth comparison value first, and then determine whether the corresponding flow meter or corresponding pipeline and pipeline interface in the airtightness testing equipment needs correction. This embodiment does not impose specific restrictions on this.

[0086] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0087] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0088] In the description of this application, "first feature" and "second feature" may include one or more of the features.

[0089] In the description of this application, "multiple" means two or more.

[0090] In the description of this application, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or the first and second features being in contact through another feature between them.

[0091] In the description of this application, the terms "above," "over," and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.

[0092] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0093] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A calibration device for an airtightness testing device, used for performing airtightness testing on the airtightness testing device, characterized in that, include: The first ventilation module is provided with a hydrogen chamber and a first interface communicating with the hydrogen chamber. The first interface is at least used to communicate with the hydrogen chamber detection interface of the airtightness detection device. The second ventilation module is provided with an air cavity and a second interface communicating with the air cavity, and the hydrogen cavity is selectively communicated with the air cavity. The second interface is at least used to communicate with the cavity detection interface of the airtightness detection device. The third ventilation module is provided with a cooling water cavity and a third interface communicating with the cooling water cavity. The cooling water cavity is selectively connected to the hydrogen cavity and the air cavity respectively. The third interface is at least used to communicate with the water cavity detection interface of the airtightness detection device. A first pipeline, the two ends of which are respectively connected to the hydrogen chamber and the air chamber, and a first standard leak hole is provided on the first pipeline; A first control valve is installed on the first pipeline to control the connection between the hydrogen chamber and the air chamber; The second pipeline has its two ends connected to the air cavity and the cooling water cavity, respectively, and a second standard leak hole is provided on the second pipeline. A second control valve is installed on the second pipeline to control the connection between the air chamber and the cooling water chamber; The third pipeline has its two ends connected to the cooling water chamber and the hydrogen chamber, respectively, and a third standard leak hole is provided on the third pipeline. A third control valve is installed on the third pipeline to control the connection between the cooling water chamber and the hydrogen chamber.

2. The calibration device for the airtightness testing equipment according to claim 1, characterized in that, The first standard leak is located on the first pipeline section between the first control valve and the hydrogen chamber.

3. The calibration device for the airtightness testing equipment according to claim 1, characterized in that, The second standard leak is located on the second piping section between the second control valve and the air chamber.

4. The calibration device for the airtightness testing equipment according to claim 1, characterized in that, The third standard leak is located on the third pipeline section between the third control valve and the cooling water chamber.

5. The calibration device for the airtightness testing equipment according to any one of claims 1 to 4, characterized in that, Also includes: The housing contains the first ventilation module, the second ventilation module, and the third ventilation module, which are respectively installed inside the housing.

6. A calibration method for an airtightness testing device, based on the calibration apparatus for the airtightness testing device as described in any one of claims 1 to 5, characterized in that, include: Obtain a reference leakage amount; Connect the calibration device and the airtightness detection equipment to obtain the actual leakage amount; The reference leakage amount and the actual leakage amount are compared to obtain a comparison value. If the comparison value is not within a preset range, it is determined that the airtightness detection device needs to be corrected.

7. The calibration method for the airtightness testing equipment according to claim 6, characterized in that, The process of comparing the reference leakage amount and the actual leakage amount to obtain a comparison value further includes: If the comparison value is within the preset range, it is determined that the airtightness testing device does not need to be corrected.

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