Air tightness testing device

Abstract

This application discloses an airtightness testing device, belonging to the field of testing. The airtightness testing device includes a housing, at least one fixing buckle, and a sealing gasket. The housing includes a cover plate with opposing first and second surfaces, and the cover plate also has an air inlet. The sealing gasket is located on the second surface and has a first opening communicating with the air inlet. The object to be tested abuts against the sealing gasket. The object to be tested includes a connected test panel and a test body. The test panel has a test hole communicating with the first opening. The test body includes a housing, a telescopic rod, and a test sealing ring. One end of the telescopic rod is located inside the housing, and the other end extends into the test hole. The test sealing ring surrounds the telescopic rod and abuts against the telescopic rod. The test sealing ring is connected to the housing and the test panel. The inner wall of the test hole, the telescopic rod, and the surface of the test sealing ring near the test panel form a test chamber. This application can detect whether there is a gap between the test panel and the test sealing ring.

Description

Technical Field

[0001] This application relates to the field of testing, and in particular to an airtightness testing device. Background Technology

[0002] For products comprising a connected panel and a main body, such as a charging dock with a connected panel and a main body, where the main body is an electronic lock, the panel has an opening, and the main body includes a housing, a telescopic rod, and a sealing ring. The housing has an opening on its side wall near the panel, one end of the telescopic rod is located inside the housing, and the other end extends from the opening in the housing to the opening in the panel. The sealing ring surrounds and abuts against the telescopic rod, and is located between the housing and the panel to be tested, with the sealing ring connected to both the housing and the panel. However, there may be a gap between the sealing ring and the housing, which could allow moisture to enter the housing through the gap between the sealing ring and the housing, and the gap between the telescopic rod and the opening in the housing, affecting the normal use of the device under test.

[0003] Therefore, an airtightness testing device is needed to perform airtightness testing on the aforementioned products, thereby detecting whether there is a gap between the sealing ring and the box. Summary of the Invention

[0004] This application provides an airtightness testing device. The technical solution is as follows:

[0005] The airtightness testing device includes a housing and at least one fixing buckle. The housing includes a cover plate having opposing first and second surfaces. The second surface has a groove and a support portion surrounding the groove. The groove is configured to receive an object to be tested. The cover plate also has an air inlet that penetrates the groove on the first and second surfaces. The at least one fixing buckle is located on the support portion and is configured to fix the object to be tested within the groove. The airtightness testing device also includes a sealing gasket located on the second surface. The sealing gasket has a first opening communicating with the air inlet. The surface of the object to be tested near the air inlet abuts against the sealing gasket. The device includes a connected panel to be tested and a main body to be tested. The panel to be tested has a test hole communicating with a first opening. The main body to be tested includes a housing, a telescopic rod, and a test sealing ring. The housing has a second opening on its side wall near the panel to be tested. One end of the telescopic rod is located inside the housing, and the other end of the telescopic rod extends from the second opening to the test hole. The test sealing ring surrounds the telescopic rod and abuts against it. The test sealing ring is located between the housing and the panel to be tested, and is connected to both the housing and the panel to be tested. The inner wall of the test hole, the telescopic rod, and the surface of the test sealing ring near the panel to be tested form a test chamber.

[0006] Optionally, the airtightness testing device further includes at least one detection structure, one end of which is fixedly connected to the groove, and the other end of which is connected to the panel to be tested; the detection structure is configured to detect the pressure on the groove in a first direction, wherein the first direction is the direction from the second surface to the first surface.

[0007] Optionally, the telescopic rod can extend and retract along the axial direction of the second opening, so that the end of the telescopic rod away from the second opening moves between a first position and a second position. The first position is located on the side of the second position away from the second opening, and in the direction from the second surface to the first surface, the sum of the length of the air supply hole, the length of the first opening, and the length of the hole to be detected is greater than or equal to the distance between the first position and the second opening.

[0008] Optionally, the housing further includes at least one storage shell, which includes a first storage shell and a second storage shell. Both the first and second storage shells are connected to the support portion, and the first and second storage shells are located on opposite sides of the groove. The storage shell has a third opening located near the side wall of the groove. The fastener includes a connected fastening body and a protruding portion. The at least one fastener includes a first fastener with the fastening body located inside the first storage shell and a second fastener with the fastening body located inside the second storage shell. The protruding portion extends and retracts relative to the fastening body from the third opening.

[0009] Optionally, the panel to be tested has a plurality of protrusions on the side near the second surface, and the bottom surface of the groove has a plurality of recesses. The plurality of protrusions and the plurality of recesses are opposite to each other, and the orthographic projection of the opening to be tested on the second surface is outside the orthographic projection of the plurality of protrusions on the second surface.

[0010] Optionally, the airtightness testing device further includes a first air source and a first air supply channel connecting the first air source and the air supply port.

[0011] Optionally, the airtightness testing device further includes a pressure gauge located on the side wall of the first air supply channel, the pressure gauge being configured to measure the air pressure within the first air supply channel.

[0012] Optionally, the airtightness testing device further includes a first valve and a second valve, wherein the first valve is located between the first air source and the pressure gauge, and the second valve is located between the pressure gauge and the air inlet.

[0013] Optionally, the airtightness testing device further includes a second air source, a third valve, and a second air supply channel. The first end of the second air supply channel is connected to the first air supply channel, and the first end of the second air supply channel is located between the first valve and the second valve. The second end of the second air supply channel is connected to the second air source. The third valve is located inside the second air supply channel. One of the first air source and the second air source is a positive pressure air source, and the other is a negative pressure air source.

[0014] Optionally, the radial dimension of the air supply hole is greater than or equal to the radial dimension of the first opening, and the radial dimension of the first opening is greater than or equal to the radial dimension of the hole to be detected.

[0015] The beneficial effects of the technical solution provided in this application embodiment include at least the following: by using the airtightness testing device provided in this application embodiment, an airtightness test is performed on the chamber to be tested, which is formed by the inner wall of the test hole, the telescopic rod, and the surface of the test sealing ring near the test panel, so as to detect whether there is a gap between the test panel and the test sealing ring, thereby determining whether there is a gap between the test sealing ring and the box body, thereby preventing water vapor from entering the box body along the gap between the test sealing ring and the box body and the gap between the telescopic rod and the second opening. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of an airtightness testing device provided in an embodiment of this application;

[0018] Figure 2 This is a schematic diagram of another airtightness testing device provided in the embodiments of this application;

[0019] Figure 3 This is a schematic diagram of the structure of a panel to be tested provided in an embodiment of this application;

[0020] Figure 4 This is a schematic diagram of the structure of a subject to be detected provided in an embodiment of this application;

[0021] Figure 5 This is a schematic diagram illustrating the cooperative relationship between an airtightness testing device, a panel to be tested, and a subject to be tested, as provided in an embodiment of this application.

[0022] Figure 6 This is a schematic diagram of a cross-sectional structure of a chamber to be tested provided in an embodiment of this application;

[0023] Figure 7 This is a schematic diagram of another airtightness testing device provided in the embodiments of this application;

[0024] Figure 8 This is a schematic diagram of another airtightness testing device provided in the embodiments of this application;

[0025] Figure 9 This is a schematic diagram of another cross-sectional structure of the chamber to be tested provided in an embodiment of this application;

[0026] Figure 10 This is a schematic diagram of another airtightness testing device provided in the embodiments of this application;

[0027] Figure 11 This is a schematic diagram of another airtightness testing device provided in the embodiments of this application;

[0028] Figure 12 This is a schematic flowchart of an airtightness testing method provided in an embodiment of this application. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0030] Figure 1 This is a schematic diagram of the structure of an airtightness testing device provided in an embodiment of this application. Figure 2 This is a schematic diagram of another airtightness testing device provided in the embodiments of this application, and Figure 1 and Figure 2 The observation angles are from opposite sides of the airtightness testing device. For example... Figure 1 and Figure 2 As shown, the airtightness testing device includes a housing 1 and at least one retaining buckle 2. The housing 1 includes a cover plate 11, which has opposing first surfaces 111 and second surfaces 112. The second surface 112 has a groove 1121 and a support portion 1122 surrounding the groove 1121. The groove 1121 is configured to accommodate the object to be tested. The cover plate 11 also has an air inlet 113 that penetrates the groove 1121 of the first surface 111 and the second surface 112. At least one retaining buckle 2 is located in the support portion 1122 and is configured to fix the object to be tested within the groove 1121. The airtightness testing device also includes a sealing gasket 3 located on the second surface 112, which has a first opening 31 communicating with the air inlet 113.

[0031] Figure 3 This is a schematic diagram of the structure of a panel to be tested provided in an embodiment of this application. Figure 4 This is a schematic diagram of the structure of a subject to be detected provided in an embodiment of this application. Figure 5 This is a schematic diagram illustrating the interaction between an airtightness testing device, a panel to be tested, and a subject to be tested, as provided in an embodiment of this application. (In conjunction with...) Figures 1 to 5The surface of the object to be tested near the air inlet 113 abuts against the sealing gasket 3. The object to be tested includes a connected test panel 4 and a test body 5. The test panel 4 has a test hole 41 communicating with the first opening 31. The test body 5 includes a box 51, a telescopic rod 52, and a test sealing ring 53. The side wall of the box 51 near the test panel 4 has a second opening 510. One end of the telescopic rod 52 is located inside the box 51, and the other end of the telescopic rod 52 extends from the second opening 510 to the test hole 41. The test sealing ring 53 surrounds the telescopic rod 52 and abuts against the telescopic rod 52. The test sealing ring 53 is located between the box 51 and the test panel 4, and is connected to both the box 51 and the test panel 4. The inner wall of the test hole 41, the telescopic rod 52, and the surface of the test sealing ring 53 near the test panel 4 form a test chamber.

[0032] It should be noted that, Figure 4 To clearly illustrate the positions of the second opening 510 and the telescopic rod 52, the structure near the second opening 510 is partially enlarged, but the sealing gasket 53 is not shown to avoid obscuring the second opening 510.

[0033] To provide a clearer example of the chamber to be tested, Figure 6 This is a schematic diagram of a cross-sectional structure of a chamber to be tested provided in an embodiment of this application, as shown below. Figure 6 As shown, the inner wall of the hole 41 to be tested, the telescopic rod 52, and the sealing ring 53 to be tested near the surface of the panel 4 to be tested form the chamber to be tested, and the position of the chamber to be tested is marked with a filling pattern.

[0034] like Figure 6 As shown in part (a), if the chamber to be tested has good airtightness, there will be no leakage when gas (as indicated by the curved arrow) is introduced into the chamber through the gas inlet 113. In this case, the housing 51 and the panel to be tested 4 are well fixed, that is, the extension direction of the telescopic rod 52 is perpendicular to the panel to be tested 3, and the pressure from the housing 51 and the panel to be tested on each part of the sealing ring 53 is relatively uniform. Therefore, during the actual use of the object under test, external moisture will not enter the interior of the housing 51 along the gap between the sealing ring 53 and the housing 51, and then along the gap between the telescopic rod 53 and the second opening 510 of the housing 51. This avoids moisture affecting the electronic components inside the housing 51 and causing the object under test to malfunction.

[0035] However, in the actual production process, the following may occur: Figure 6In the case shown in part (b), where the housing 51 and the panel to be tested 4 are not properly secured, near the sealing ring 53, the plane of the housing 51 near the panel to be tested 4 is not parallel to the plane of the panel to be tested 4 near the housing 51. This results in the first part 531 of the sealing ring 53 being pressed tightly by the housing 51 and the panel to be tested 4, while the second part 532 of the sealing ring 53 is pressed loosely by the housing 51 and the panel to be tested 4. For example, for... Figure 6 The sealing ring 53 to be tested shown in part (b) has its lower half being the first part 531 and its upper half being the second part 532. Therefore, if there is a gap between the second part 532 of the sealing ring 53 and the housing 51, there will also be a gap between the second part 532 of the sealing ring 53 and the panel 4 to be tested, and vice versa. That is, if there is a gap between the second part 532 of the sealing ring 53 and the panel 4 to be tested, there will also be a gap between the second part 532 of the sealing ring 53 and the housing 51.

[0036] Therefore, the airtightness of the chamber under test can be detected using the airtightness testing device provided in this application embodiment, to detect whether there is a gap between the sealing ring 53 under test and the panel 4 under test. If there is a gap, the gas input from the air inlet 113 may be leaking. Figure 6 Leakage occurs at arrow a in part (b), which allows detection of a gap between the sealing ring 53 and the housing 51, preventing moisture from entering the device during actual use. Figure 6 The arrow at point b in part (b) enters the interior of box 51, affecting the normal use of the object to be tested.

[0037] Furthermore, this embodiment of the application provides a sealing gasket 3 to ensure that there is no gap between the air tightness testing device and the panel to be tested 4 near the air inlet 113. In other words, there is no gap between the air tightness testing device and the object to be tested near the air inlet 113, thereby avoiding leakage of gas input from the air inlet 113 due to the gap between the air tightness testing device and the panel to be tested near the air inlet 113, which would affect the test results.

[0038] In summary, the airtightness testing device provided in this application includes a housing, at least one fixing buckle, and a sealing gasket. The housing includes a cover plate with opposing first and second surfaces. The second surface has a groove, and the fixing buckle fixes the object to be tested within the groove. The cover plate also has an air inlet through the groove on the first and second surfaces. The sealing gasket is located on the second surface and has a first opening communicating with the air inlet. The object to be tested includes a panel to be tested and a body to be tested. The panel to be tested has a test hole, and the body to be tested includes a housing with a second opening, a telescopic rod extending from the second opening to the test hole, and a test sealing ring located between the panel to be tested and the housing and surrounding the telescopic rod. Thus, by using the airtightness testing device provided in this application embodiment, an airtightness test can be performed on the chamber to be tested, which is formed by the inner wall of the test hole, the telescopic rod, and the surface of the test sealing ring near the test panel. This allows for the detection of whether there is a gap between the test panel and the test sealing ring, thereby determining whether there is a gap between the test sealing ring and the box body. This prevents moisture from entering the box body through the gap between the test sealing ring and the box body and the gap between the telescopic rod and the second opening.

[0039] For example, the object to be tested could be a charging dock installed on a new energy vehicle. Figure 3 As shown, panel 4 to be tested is a charging panel. Figure 4 As shown, the main body 5 to be tested is an electronic lock, the telescopic rod 53 is a locking rod, and the box 51 contains multiple electronic components (not shown in the figure). If a gap occurs between the box 51 and the sealing ring 53 to be tested, during the use of the charging dock, moisture may enter the box 51 through the gap between the sealing ring 53 and the box 51, and then through the gap between the locking rod and the second opening 510 of the box 5. This will affect the normal operation of the electronic components inside the box 51, which may cause the charging dock to malfunction, for example, the locking rod may not be able to extend or retract properly.

[0040] For example, such as Figure 4 As shown, the subject 5 to be tested includes a first connecting part 54 and a second connecting part 55 connected to the box body 51 and located on both sides of the box body. Both the first connecting part 54 and the second connecting part 55 have hollow connecting holes, facilitating the fixing of the subject 5 to be tested and the panel 4 to be tested using methods such as screws and nuts. The bolts include a first bolt (not shown) and a second bolt (not shown). The first bolt passes through the connecting hole of the first connecting part 54, and the second bolt passes through the connecting hole of the second connecting part 55. Because when connecting the first bolt to the corresponding nut and the second bolt to the corresponding nut, one bolt may fit the nut more tightly while the other bolt fits less loosely, thus leading to... Figure 6Part (b) shows the situation where one part of the sealing ring 53 is squeezed tighter and the other part is squeezed looser.

[0041] For example, such as Figure 3 As shown, the panel to be tested 4 (charging panel) includes a first opening 42 and a second opening 43. The subject to be tested includes a first charging interface (not shown) and a second charging interface (not shown) located within the first opening 42 and the second opening 43, respectively. Exemplarily, one of the first charging interface and the second charging interface can be a fast charging interface, and the other can be a slow charging interface. For example, the first charging interface can be a slow charging interface, and the second charging interface can be a fast charging interface. Here, the fast charging interface is used to connect to a fast charging gun, and the slow charging interface is used to connect to a slow charging gun.

[0042] Combination Figure 3 and Figure 4 By setting a test subject with a telescopic rod 52 (locking rod), the telescopic rod 52 extends from the box 51 into the test hole 41. When the charging gun is connected to the charging interface located in the first opening 42, the telescopic rod 52 extends to the side of the test panel 4 away from the test subject 5. At this time, the telescopic rod 52 can fix the charging interface, thereby preventing the charging gun from falling off the charging interface located in the first opening 42 during the charging process, thus affecting the charging. If moisture enters the box 51, it may cause the electronic components controlling the extension and retraction of the telescopic rod inside the box 51 to malfunction. For example, after the charging is finished, the telescopic rod cannot retract, making it impossible to remove the charging gun; or, before the charging starts, the telescopic rod cannot extend, making it impossible to fix the charging gun and the charging interface located in the first opening 42, thus causing abnormal charging, and / or, during the charging process, the charging gun falls off the charging interface located in the first opening 42, resulting in abnormal termination of charging. Optionally, one side of the charging gun has a fixing structure that matches the telescopic rod 52, such as a snap-fit ​​structure that matches the telescopic rod 52.

[0043] For example, combined Figure 1 , Figure 3 and Figure 5The panel 4 to be tested has multiple protrusions 44 on the side near the second surface 112, and the bottom surface of the groove 1121 has multiple recesses 11211. The multiple protrusions 44 are opposite to the multiple recesses. The orthographic projection of the opening 41 to be tested on the second surface 112 is outside the orthographic projection of the multiple protrusions 44 on the second surface 112. That is, the opening 41 to be tested is not located on the protrusions 44. Therefore, the shape of the bottom surface of the groove 112 is designed according to the shape and position of the protrusions 44, so that the bottom surface of the groove 1121 has multiple recesses 11211 that are opposite to the multiple protrusions 44. This allows the recesses 11211 to accommodate the protrusions 44, thereby facilitating the panel 4 to be tested to abut against the sealing gasket 3 at the opening 41 to be tested.

[0044] For example, combined Figure 4 and Figure 6 In part (a), the telescopic rod 52 is axially extendable along the second opening 510, allowing the end of the telescopic rod 52 away from the second opening 510 to move between a first position and a second position. The first position is located on the side of the second position away from the second opening 510, and in the direction from the second surface 112 to the first surface 111, the sum of the length of the air supply hole 113, the length of the first opening 31, and the length of the hole to be tested 41 is greater than or equal to the distance between the first position and the second opening 150. Since other structures, such as air supply channels for conveying gas, are provided on the side of the air supply hole 113 away from the object to be tested, if the telescopic rod 52 extends too far, it will cause the telescopic rod 52 to collide with other structures on the side of the air supply hole 113 away from the object to be tested, thereby affecting the structure of the object to be tested, such as affecting the tightness of the connection between the panel 4 to be tested and the main body 5 to be tested, thus affecting the test results. Therefore, by setting the sum of the lengths of the air inlet 113, the first opening 31, and the test hole 41 to be greater than or equal to the distance between the first position and the second opening 150, this embodiment of the application can avoid collisions between the telescopic rod 52 and other structures (such as air pipes) on the side of the air inlet 113 away from the test object, thereby improving the accuracy of the test results. Furthermore, since collisions between the telescopic rod 52 and other structures on the side of the air inlet 113 away from the test object are avoided, airtightness tests can be performed not only on static test chambers but also on dynamic test chambers. That is, during the test, the airtightness test of the test chamber is performed while the end of the telescopic rod 52 away from the second opening 510 moves between the first and second positions.

[0045] For example, the radial dimension of the air inlet 113 is greater than or equal to the radial dimension of the first opening 31, and the radial dimension of the first opening 31 is greater than or equal to the radial dimension of the hole to be detected 41. For example Figure 6As shown, the radial dimension of the air inlet 113 is equal to the radial dimension of the first opening 31, and the radial dimension of the first opening 31 is equal to the radial dimension of the hole to be tested 41. Since the end of the telescopic rod 52 away from the second opening 510 may extend out of the panel 4 to be tested, by limiting the radial dimensions of the air inlet 113, the first opening 31, and the hole to be tested 41, it can be avoided that if the radial dimensions of the air inlet 113 or the first opening 31 are too small, the telescopic rod will collide with the air tightness testing device when the object to be tested is fixed to the air tightness testing device, thereby affecting the air tightness of the chamber to be tested and causing inaccurate air tightness test results.

[0046] In one possible embodiment, see again Figure 1 and Figure 2 The cover plate 1 also has a first fixing hole 114 through a groove 1121 penetrating the first surface 111 and the second surface 112. The sealing gasket 3 also includes a fixing post (not shown in the figure) located in the first fixing hole 114. By placing the fixing post of the sealing gasket 3 into the first fixing hole 114, the sealing gasket 3 and the cover plate 1 are fixedly connected.

[0047] For example, such as Figure 1 As shown, the orthographic projection of the sealing gasket 3 onto the second surface 112 is located within the groove 1121 of the second surface 112. That is, the sealing gasket 3 is only located within the groove 1121. Compared with a sealing gasket 3 covering the entire second surface 112, this embodiment of the application provides a smaller sealing gasket 3 only within the groove 1121 near the air outlet 113. This allows the sealing gasket 3 to be closer to the surface of the object to be tested. Compared to the area of ​​the second surface 112 near the sealing gasket 3 but without a sealing gasket 3, it protrudes towards the object to be tested. This allows for a height difference between the surface of the airtightness testing device and the surface of the object to be tested near the air outlet 113. This height difference facilitates sufficient contact between the surface of the object to be tested near the air outlet 113 and the sealing gasket 3 when aligning the test hole 41 of the test panel 4 with the first opening 31, thereby improving the accuracy of the airtightness test results.

[0048] For example, combined Figure 1 and Figure 3 Let S1 be the area of ​​the hole 41 to be tested on the panel 4 to be tested, and S2 be the area of ​​the sealing gasket 32. S1 and S2 satisfy: S2 / S1≥8 and S2 / S1≤12. Optionally, S2 / S1 is 8, or S2 / S1 is 10, or S2 / S1 is 12.

[0049] For example, the area of ​​the sealing gasket 3 may also be smaller than... Figure 1 As shown, for example, sealing gaskets 3 can be provided in all grooves 1121, or sealing gaskets 3 can be provided on the entire second surface 112.

[0050] Figure 7 This is a schematic diagram of another airtightness testing device provided in an embodiment of this application. Figure 8 This is a schematic diagram of another airtightness testing device provided in an embodiment of this application. Figure 9 This is a schematic cross-sectional view of another chamber to be tested provided in an embodiment of this application. In another possible embodiment, such as... Figure 7 , Figure 8 and Figure 9 As shown, the airtightness testing device also includes a connected metal tube 81 and a metal gasket 82. The metal tube 81 is located inside the air inlet 113, and the metal gasket 82 is located between the cover plate 11 and the sealing gasket 3. The metal gasket 82 has a fourth opening 821 communicating with the metal tube 81. The metal tube 81 facilitates the installation of an air supply pipe for supplying air into the air inlet 113, and the air supply pipe is connected to the metal tube 81. The metal gasket 82 can improve the strength of the area near the air inlet 113, extend the service life of the airtightness testing device, and also improve the flatness, so that the sealing gasket 3 and the metal gasket 82 are in a tighter contact than the sealing gasket 3 and the housing 1, which is conducive to further improving the accuracy of the airtightness test results. Optionally, the length of the metal tube 81 is greater than or equal to the length of the air inlet 113. Here, the length refers to the dimension of the metal tube 81 and the air inlet 113 in the direction perpendicular to the panel 4 to be tested.

[0051] Optionally, the metal washer 82 also includes a second fixing hole 822. The first fixing hole 114 and the second fixing hole 822 can be used to install matching screws (not shown) and nuts (not shown) to fix the metal washer 82 to the cover plate 1.

[0052] Optionally, the surface of the metal gasket 82 near the sealing gasket 3 also has multiple recessed structures. The sealing gasket 3 also includes a fixing post located in the recessed structure of the metal gasket 82. By placing the fixing post of the sealing gasket 3 into the recessed structure 4 of the metal gasket 82, the sealing gasket 3 and the metal gasket 82 are fixedly connected.

[0053] In the embodiments of this application, see again... Figure 1 The airtightness testing device also includes at least one detection structure 6, one end of which is fixedly connected to the groove 1121, and the other end of which is connected to the panel 4 to be tested. The detection structure 6 is configured to detect the pressure on the groove 1121 in a first direction x, where the first direction x is the direction from the second surface 112 to the first surface 111.

[0054] After the object to be tested is placed into the groove 1121, pressure in the first direction x needs to be applied to the panel 4 to be tested, so that the panel 4 to be tested and the sealing gasket 3 can fully abut against each other. Then, the object to be tested is fixed in the groove 1121 by the fixing buckle 2. That is, the pressure detected by the detection structure 6 when the object to be tested is in the groove 1121 but not fixed by the fixing buckle 2 is recorded as F1, and the pressure detected by the detection structure 6 when the object to be tested is fixed in the groove 1121 by the fixing buckle 2 is recorded as F2, where F1 is less than F2. Among them, after the object to be tested is fixed in the groove 1121 by the fixing buckle 2, the pressure detected by the detection structure 6 is within the target range value.

[0055] However, in actual testing, there may be situations where foreign objects get stuck between the object to be tested and the airtightness testing device. For example, the object to be tested may be a charging dock with many cables, and the cables may get stuck between the object to be tested and the airtightness testing device. Therefore, after the object to be tested is fixed in the groove 1121 by the fixing buckle 2, the pressure detected by the detection structure 6 may be greater than the target range value.

[0056] In actual testing, there may be a situation where the fixing buckle 2 fails to secure the object to be tested within the groove 1121. In this case, the pressure detected by the detection structure 6 is less than the target range.

[0057] Therefore, after the object to be tested is fixed in the groove 1121 by the fixing buckle 2, it can be determined whether the object to be tested is well fixed in the groove 1121 based on whether the pressure detected by the detection structure 6 is within the target range, thereby determining whether to proceed with the subsequent inflation test. The setting of the detection structure 6 can improve the accuracy of the airtightness test results.

[0058] For example, the airtightness testing device includes multiple detection structures 6, such as... Figure 1 The four detection structures 6 are shown. By setting multiple detection structures 6, it is possible to more accurately detect whether the object to be tested is properly fixed in the groove 1121 by the fixing buckle 2. For example, if a foreign object is stuck between the airtightness testing device and the object to be tested, the detection structure 6 closer to the foreign object may detect a higher pressure, while the other detection structures 6 may detect a lower pressure. As another example, if one or more of the fixing buckles 2 used to fix the object to be tested malfunction, such as failing to extend properly, the object to be tested may not be properly fixed in the groove 1121. In this case, the detection structure 6 closer to the malfunctioning fixing buckle 2 may detect a lower pressure, while the other detection structures 6 may detect a higher pressure.

[0059] For example, such as Figure 1 As shown, the four detection structures 6 are the first detection structure, the second detection structure, the third detection structure, and the fourth detection structure. When the pressure detected by all four detection structures 6 is within the first target range value, the second target range value, the third target range value, and the fourth target range value, respectively, it can be determined that the object to be tested is well fixed in the groove 1121, and the subsequent inflation test can be carried out. When the pressure detected by one of the four detection structures 6 is outside the corresponding target range value, for example, if the pressure detected by the first detection structure is outside the first target range value, the operator needs to check the airtightness detection device and the object to be tested, and then use the fixing buckle 2 to fix the object to be tested in the groove 1121 again. Only after confirming that the pressure detected by all four detection structures 6 is within the first target range value, the second target range value, the third target range value, and the fourth target range value, respectively, can the subsequent inflation test be carried out.

[0060] For example, see again Figure 1 The housing 1 also includes at least one storage shell, which includes a first storage shell 121 and a second storage shell 122. Both the first storage shell 121 and the second storage shell 122 are connected to the support portion 1122, and the first storage shell 121 and the second storage shell 122 are located on opposite sides of the groove 1121. The storage shell has a third opening 120 located near the side wall of the groove 1121. The fixing buckle 2 includes a connected fixing body (not shown) and a protrusion 20. At least one fixing buckle 2 includes a first fixing buckle 21 whose fixing body is located in the first storage shell 121, and a second fixing buckle 22 whose fixing body is located in the second storage shell 122. The protrusion 20 extends and retracts relative to the fixing body from the third opening 120. By providing the storage shell 12, the fixing buckle 2 can be stored in the storage shell when the fixing buckle 2 is not used to fix the object to be tested. For example, before fixing the object to be tested into the groove 1121, a storage shell can be used to store the fixing buckle 2 to prevent the protruding part 20 of the fixing buckle 2 from protruding from the third opening 120 and blocking the operator from placing the object to be tested into the groove 1121. Exemplarily, the material of the shell 1 includes nylon.

[0061] Figure 10 This is a schematic diagram of another airtightness testing device provided in an embodiment of this application. Figure 10As shown, the cover plate 11 includes a first part 13 and a second part 14. The first part 13 of the cover plate includes a groove 1121 near the surface of the object to be inspected, and the first part 13 of the cover plate 11 is detachable from the second part 14 of the cover plate, so that the first part 13 of the cover plate 11 of different shapes can be flexibly replaced according to the different shapes of the objects to be inspected. Exemplarily, the first part 13 and the second part 14 of the cover plate 11 are fixed by a snap-fit ​​or by bolts or other means.

[0062] Figure 11 This is a schematic diagram of another airtightness testing device provided in an embodiment of this application. Figure 11 As shown, the airtightness testing device also includes a first air source 71 and a first air supply channel 72 connecting the first air source 71 and the air supply port 113. By setting the first air source 71 and the first air supply channel 72, gas can be input into the air supply port 113.

[0063] For example, such as Figure 11 As shown, the airtightness testing device also includes a pressure gauge 73, which is located on the side wall of the first air supply channel 72. The pressure gauge 73 is configured to measure the air pressure within the first air supply channel 72. By providing a pressure gauge 73 that can measure the air pressure within the first air supply channel 72, the airtightness of the chamber under test can be determined based on the reading of the pressure gauge 73. For example, if the reading of the pressure gauge 73 decreases, it can be determined that the chamber under test is leaking.

[0064] For example, such as Figure 11 As shown, the airtightness testing device also includes a first valve 74 and a second valve 75. The first valve 74 is located between the first gas source 71 and the pressure gauge 73, and the second valve 75 is located between the pressure gauge 73 and the air inlet 113. By setting the first valve 74 and the second valve 75 in the first air inlet 72, and with the first valve 74 and the second valve 75 located on both sides of the pressure gauge 73, a pressure stabilization function can be achieved, making the airtightness test results more accurate. Specifically, the steps are as follows: Open the first valve 74 and close the second valve 75; open the first gas source 71 to input gas into the first air inlet 72; close the first valve 74 and close the second valve 75 until the reading of the pressure gauge 73 stabilizes; close the first valve 74 and open the second valve 75, wait for a period of time to allow the input gas to fill the chamber to be tested, and observe whether there is a change in the reading of the pressure gauge 73. If there is a change, such as a decrease in the reading of the pressure gauge 73, it can be determined that the airtightness of the chamber to be tested is poor. For example, the first valve 74 and the second valve 75 are solenoid valves.

[0065] For example, such as Figure 11As shown, the airtightness testing device also includes a fourth valve 79, which is located between the first valve 74 and the pressure gauge 73, and also between the third valve 78 and the pressure gauge 73. In actual use, the first valve 74 can be opened first, and the second valve 75 and the fourth valve 79 can be closed. The first gas source 71 can be opened to input gas into the first gas supply channel 72. The first valve 74, the second valve 75, and the fourth valve 79 can then be closed until the reading of the pressure gauge 73 stabilizes. The fourth valve 79 can be closed, and the second valve 75 can be opened. After a period of time, allowing the input gas to fill the chamber to be tested, the reading of the pressure gauge 73 can be observed to see if there is a change. If there is a change, such as a decrease in the reading of the pressure gauge 73, it can be determined that the airtightness of the chamber to be tested is poor.

[0066] For example, such as Figure 11 As shown, the airtightness testing device also includes a second air source 76, a third valve 78, and a second air supply channel 77. The first end of the second air supply channel 77 is connected to the first air supply channel 72, and the first end of the second air supply channel 77 is located between the first valve 74 and the second valve 75. The second end of the second air supply channel 77 is connected to the second air source 76. The third valve 78 is located within the second air supply channel 77. One of the first air source 71 and the second air source 76 is a positive pressure air source, and the other is a negative pressure air source. By setting up both a positive pressure air source and a negative pressure air source in the airtightness testing device, the choice between using a positive pressure air source or a negative pressure air source can be made freely according to different testing conditions. For example, the same object to be tested can be tested using both a positive pressure air source and a negative pressure air source to further ensure the good airtightness of the chamber under test. It should be noted that when a negative pressure air source is connected, if the airtightness of the chamber under test is poor, the reading of the pressure gauge 73 will rise instead of fall.

[0067] Figure 12 This is a schematic flowchart of an airtightness testing method provided in an embodiment of this application. Figure 12 As shown, the method includes:

[0068] Step 1201: Open the first valve and close the second valve, and input gas into the first gas supply channel through the first gas source.

[0069] For example, the pressure of the first gas source 71 is set to 30 kPa or other values. For example, the time for gas to be input into the first gas supply channel 72 through the first gas source 71 is 10 seconds.

[0070] Step 1202: Close the first valve and record the reading of the air pressure test gauge as the first value.

[0071] For example, step 1202 is performed after the value of the pressure gauge 73 in step 1201 has stabilized. For example, after closing the first valve 74, the reading of the pressure gauge 73 is taken as the first value after it has stabilized. Optionally, the time to wait for the value of the pressure gauge 73 to stabilize is approximately 10 seconds.

[0072] Step 1203: Open the second valve and record the reading of the air pressure test gauge as the second value.

[0073] For example, after opening the second valve 75, wait for about 10 seconds, and then take the reading of the air pressure gauge 73 as the second value.

[0074] Step 1204: Compare the first value and the second value. If the difference between the second value and the first value is less than or equal to the target difference, the airtightness of the chamber under test is good; if the difference between the second value and the first value is greater than the target difference, the airtightness of the chamber under test is poor. Optionally, the target difference can be 0.1% to 0.3% of the first value.

[0075] For example, step 1203 can also be: opening the second valve 75, waiting for a first period of time and recording the reading of the pressure gauge 73 as the third value, waiting for a second period of time and recording the reading of the pressure gauge 73 as the fourth value, and comparing the difference between the third value and the fourth value to detect whether the airtightness of the chamber to be tested is good.

[0076] Exemplary examples show that this application embodiment can perform airtightness testing not only on static chambers under test, but also on dynamic chambers under test. For example, after steps 1201 and 1202 above, the second valve is opened, and during the movement of the end of the telescopic rod away from the second opening between a first position and a second position, multiple readings of the pressure gauge are recorded as multiple fifth values. By comparing the differences between the multiple fifth values, the airtightness of the dynamic chamber under test can be detected. For example, if the difference between the multiple fifth values ​​is less than a target difference, the airtightness of the chamber under test is good; if the difference between the multiple fifth values ​​is greater than the target difference, the airtightness of the chamber under test is poor.

[0077] It should be noted that the specific values ​​of air pressure and time mentioned in the above steps are for reference only, and the embodiments of this application do not limit them.

[0078] It should be noted that the terminology used in the implementation section of the embodiments of this application is only for explaining the embodiments of this application and is not intended to limit the embodiments of this application. Unless otherwise defined, the technical or scientific terms used in the implementation of the embodiments of this application should have the ordinary meaning understood by a person skilled in the art to which the embodiments of this application pertain. The words "first," "second," and similar terms used in the patent application specification and claims of the embodiments of this application do not indicate any order, quantity, or importance, but are only used to distinguish different components. Similarly, the words "an" or "a" and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The words "comprising" or "including" and similar terms mean that the elements or objects preceding "comprising" or "including" cover the elements or objects listed after "comprising" or "including" and their equivalents, and do not exclude other elements or objects. The directional terms mentioned in the embodiments of this application, such as "top", "bottom", "up", "down", "left" or "right", are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of this application, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0079] The above are merely optional embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An airtightness testing device, characterized in that, The airtightness testing device includes a housing and at least one fixing buckle. The housing includes a cover plate having opposing first and second surfaces. The second surface has a groove and a support portion surrounding the groove. The groove is configured to accommodate an object to be tested. The cover plate also has an air inlet that penetrates the groove on the first and second surfaces. The at least one fixing buckle is located on the support portion and is configured to fix the object to be tested within the groove. The airtightness testing device further includes a sealing gasket located on the second surface. The sealing gasket has a first opening communicating with the air inlet. The surface of the object to be tested near the air inlet abuts against the sealing gasket. The object to be tested includes a panel to be tested and a body to be tested connected together. The panel to be tested has a test hole communicating with the first opening. The body to be tested includes a box, a telescopic rod, and a test sealing ring. The box has a second opening on its side wall near the panel to be tested. One end of the telescopic rod is located inside the box, and the other end of the telescopic rod extends from the second opening to the test hole. The test sealing ring surrounds the telescopic rod and abuts against the telescopic rod. The test sealing ring is located between the box and the panel to be tested, and the test sealing ring is connected to both the box and the panel to be tested. The inner wall of the hole to be tested, the telescopic rod, and the surface of the sealing ring to be tested near the panel to be tested form the chamber to be tested.

2. The airtightness testing device according to claim 1, characterized in that, The airtightness testing device further includes at least one detection structure, one end of which is fixedly connected to the groove, and the other end of which is connected to the panel to be tested. The detection structure is configured to detect the pressure exerted on the groove in a first direction, the first direction being the direction from the second surface to the first surface.

3. The airtightness testing device according to claim 1, characterized in that, The telescopic rod can extend and retract along the axial direction of the second opening, so that the end of the telescopic rod away from the second opening moves between a first position and a second position. The first position is located on the side of the second position away from the second opening, and in the direction from the second surface to the first surface, the sum of the length of the air supply hole, the length of the first opening, and the length of the hole to be detected is greater than or equal to the distance between the first position and the second opening.

4. The airtightness testing device according to claim 1, characterized in that, The housing further includes at least one storage shell, which includes a first storage shell and a second storage shell. Both the first and second storage shells are connected to the support portion and are located on opposite sides of the groove. The storage shell has a third opening located near the side wall of the groove. The fastener includes a connected fastening body and a protruding portion. The at least one fastener includes a first fastener with the fastening body located inside the first storage shell and a second fastener with the fastening body located inside the second storage shell. The protruding portion extends and retracts relative to the fastening body from the third opening.

5. The airtightness testing device according to claim 1, characterized in that, The panel to be tested has multiple protrusions on the side near the second surface, and the bottom surface of the groove has multiple recesses. The multiple protrusions and the multiple recesses are opposite to each other. The orthographic projection of the opening to be tested on the second surface is outside the orthographic projection of the multiple protrusions on the second surface.

6. The airtightness testing device according to claim 1, characterized in that, The airtightness testing device further includes a first air source and a first air supply channel connecting the first air source and the air supply port.

7. The airtightness testing device according to claim 6, characterized in that, The airtightness testing device also includes a pressure gauge, which is located on the side wall of the first air supply channel and is configured to measure the air pressure in the first air supply channel.

8. The airtightness testing device according to claim 7, characterized in that, The airtightness testing device further includes a first valve and a second valve, wherein the first valve is located between the first air source and the air pressure test gauge, and the second valve is located between the air pressure test gauge and the air supply port.

9. The airtightness testing device according to claim 8, characterized in that, The airtightness testing device further includes a second air source, a third valve, and a second air supply channel. The first end of the second air supply channel is connected to the first air supply channel, and the first end of the second air supply channel is located between the first valve and the second valve. The second end of the second air supply channel is connected to the second air source, and the third valve is located inside the second air supply channel. One of the first gas source and the second gas source is a positive pressure gas source, and the other is a negative pressure gas source.

10. The airtightness testing device according to claim 1, characterized in that, The radial dimension of the air supply hole is greater than or equal to the radial dimension of the first opening, and the radial dimension of the first opening is greater than or equal to the radial dimension of the hole to be tested.

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