Method and device for detecting micro leakage of airtight packaging part
By injecting inert gas into the air-sealed packaging and suction identification, the problems of difficulty, time-consuming and low accuracy of the air-sealed packaging are solved, and fast and accurate micro-leak detection is achieved.
Patent Information
- Application Number
- CN202411509291.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-25
- Publication Date
- 2025-07-11
AI Technical Summary
In the prior art, leakage detection of air-sealed packaging has problems such as difficulty in detection, time-consuming and low accuracy, especially the detection efficiency and accuracy of vacuum insulation plates.
Using inert gas such as helium to the gas-sealed package as the medium gas, the gas leakage is absorbed and identified, and the suction assembly and detection assembly are used to perform rapid and accurate micro leakage detection.
It realizes fast and accurate micro-leak detection of air-seal packaging, with fast detection speed and no damage to the packaging, and can be widely used in micro-leak detection of air-seal packaging.
Smart Images
Figure CN120293433A_ABST
Abstract
Description
Technical Field
[0001] The present invention belongs to the technical field of vacuum insulation, and particularly relates to a method and a device for detecting micro-leakage of a hermetically sealed component. Background Art
[0002] Vacuum insulation panel (VIP panel) is a kind of vacuum thermal insulation material, which is mainly made by vacuum packaging the core material and gas adsorbent into a barrier film bag. It can effectively avoid heat transfer caused by air convection, can greatly reduce the thermal conductivity coefficient, and play the role of heat preservation and insulation. In order to ensure the performance of the vacuum insulation panel, the prepared samples will be placed for 3 days before testing the thermal conductivity coefficient. Due to the long testing time of the precise thermal conductivity detector, sampling inspection is often carried out to improve the efficiency, and inevitable undetected cases exist; although the rapid thermal conductivity detector has high efficiency and can complete the detection in 30 - 60 s, the testing accuracy is low and the error is large, and it can only eliminate VIP samples with serious leakage.
[0003] Therefore, in view of the above deficiencies, the present invention is specifically proposed. Summary of the Invention
[0004] The purpose of the present invention is to provide a method and a device for detecting micro-leakage of a hermetically sealed component, so as to solve the problem of leakage detection of hermetically sealed components in the prior art.
[0005] The first aspect of the present invention provides a method for detecting micro-leakage of a hermetically sealed component, including:
[0006] Introduce a medium gas into the film bag of the hermetically sealed component and heat-seal to obtain the hermetically sealed component;
[0007] Extract the gas in and around the hermetically sealed component and identify the medium gas. When the medium gas is identified, it means that the hermetically sealed component has a micro-leakage; when the medium gas is not identified, it means that the hermetically sealed component is well encapsulated.
[0008] The method for detecting micro-leakage of a hermetically sealed component provided by the present invention may also have the following additional technical features:
[0009] In a specific embodiment of the present invention, the medium gas is an inert gas.
[0010] In a specific embodiment of the present invention, the medium gas is helium.
[0011] In a specific embodiment of the present invention, the volume ratio of the medium gas to the volume of the film bag is 1% - 50%.
[0012] In a specific embodiment of the present invention, the position where the medium gas is introduced is the bottom seal away from the opening of the film bag.
[0013] In a specific embodiment of the present invention, the hermetic package is a vacuum insulation panel.
[0014] The second aspect of the present invention also provides a detection device for the micro-leakage detection method of the hermetic package described in any one of the above, including:
[0015] A suction assembly, including a gas compression tank, an air pump and a suction cup connected to each other. The suction cup is used to adsorb or wrap the hermetic package, and the air pump is used to suck the gas around the hermetic package and store it in the gas compression tank;
[0016] A detection assembly, including a medium gas detector and a digital display connected electrically. The medium gas detector is arranged in the gas compression tank and is used to identify the medium gas and display it through the digital display.
[0017] In a specific embodiment of the present invention, the suction cup is in a disc shape, V shape or pocket shape.
[0018] In a specific embodiment of the present invention, the suction cup is made of a hard material or a flexible material.
[0019] In a specific embodiment of the present invention, the medium gas detector is a helium detection sensor.
[0020] The micro-leakage detection method provided by the present invention pre-injects a medium gas convenient for detection into the hermetic package. After the vacuum packaging of the hermetic package, a small amount of the medium gas still remains in the hermetic package. At this time, by obtaining the gas inside and outside the hermetic package and identifying the medium gas, if the obtained gas contains the medium gas, it means that the hermetic package has a gas leak; if the obtained gas does not contain the medium gas, it means that the hermetic package has no gas leak. Thus, it can be determined whether the hermetic package is intact according to the presence or absence of the medium gas. Compared with the problems of difficult detection, long time consumption and low accuracy in the related art for vacuum insulation panels, the micro-leakage detection method of the hermetic package provided by the present invention not only has a fast detection speed and high detection accuracy, but also has a fast detection process and will not damage the hermetic package. Therefore, it can be widely applied to the micro-leakage detection of hermetic packages. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.
[0022] Figure 1 This is a schematic structural diagram of the vacuum insulation panel in the embodiment of the present invention;
[0023] Figure 2 This is a schematic structural diagram of the vacuum insulation panel in the embodiment of the present invention;
[0024] Figure 3 This is a schematic structural diagram of the detection device in the embodiment of the present invention.
[0025] Explanation of reference numerals:
[0026] 1 - Vacuum insulation panel; 11 - Membrane material, 12 - Core material, 13 - Getter or desiccant, 14 - Hem, 15 - Connector;
[0027] 2 - Detection device, 21 - Suction cup, 22 - Air pump, 23 - Compression tank, 24 - Medium gas detector, 25 - Digital display. Detailed implementation manners
[0028] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present invention can be more thoroughly understood and the scope of the present invention can be fully conveyed to those skilled in the art.
[0029] It should be understood that the terms used herein are for the purpose of describing specific exemplary embodiments only and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "a", "an", and "the" as used herein may also include the plural forms. The terms "comprising", "including", "containing", and "having" are inclusive and thus specify the presence of the stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring them to be performed in the particular order described or illustrated, unless the order of performance is explicitly stated. It should also be understood that additional or alternative steps may be used.
[0030] Although terms such as first, second, and third may be used herein to describe multiple elements, components, regions, layers, and / or sections, these elements, components, regions, layers, and / or sections should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or section from another. Unless the context clearly indicates otherwise, terms such as "first" and "second" and other numerical terms do not imply an order or sequence when used in this document. Therefore, the first element, component, region, layer, or section discussed below may be referred to as the second element, component, region, layer, or section without departing from the teachings of the exemplary embodiments.
[0031] For ease of description, spatial relative relationship terms may be used herein to describe the relationship of one element or feature shown in the figure to another element or feature, such as "inside", "outside", "inner side", "outer side", "below", "beneath", "above", "on top", etc. Such spatial relative relationship terms are intended to include different orientations of the device in use or operation other than the orientations depicted in the figure. For example, if the device in the figure is flipped, an element described as "below" or "beneath" another element or feature will then be oriented as "above" or "on top" of the other element or feature. Thus, the exemplary term "below" can include orientations of above and below. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative relationship descriptors used in this document are interpreted accordingly.
[0032] A first aspect of an embodiment of the present invention provides a method for micro-leakage detection of a hermetic package, including:
[0033] Introduce a medium gas into the film bag of the hermetic package and heat-seal it to obtain a hermetic package;
[0034] Extract the gas in and around the hermetic package and perform identification of the medium gas. If the medium gas is identified, it indicates that the hermetic package has a micro-leakage. If the medium gas is not identified, it indicates that the hermetic package is well-sealed.
[0035] Specifically, the hermetic package is a gas-tight structure that is sealed separately for each part formed by encapsulation, such as a vacuum seal, etc. In theory, there is no gas exchange between the inside and outside of the hermetic package, that is, the gas inside the hermetic package will not leak, and the gas outside the hermetic package will not enter the inside of the hermetic package. However, in actual applications, the hermetic package may have problems such as leakage caused by process or material errors.
[0036] The micro-leakage detection method provided by the embodiment of the present invention passes a medium gas convenient for detection into the hermetic package in advance. In this way, after the hermetic package is vacuum packaged, a small amount of the medium gas can still remain in the hermetic package. At this time, by obtaining the gas inside and outside the hermetic package and identifying the medium gas, when the obtained gas contains the medium gas, it means that the hermetic package has a gas leak. If the obtained gas does not contain the medium gas, it means that the hermetic package does not have a gas leak. Furthermore, it is possible to determine whether the hermetic package is intact based on the presence or absence of the medium gas. And compared with the problems of difficult detection, long time consumption, and low accuracy in the related art for vacuum insulation panels, the micro-leakage detection method for the hermetic package provided by the embodiment of the present invention not only has a fast detection speed and high detection accuracy, but also has a fast detection process and will not damage the hermetic package. Therefore, it can be widely applied to the micro-leakage detection of hermetic packages.
[0037] In one embodiment, the medium gas is an inert gas. The chemical properties of inert gases are not active and generally do not combine with other elements. Therefore, introducing an inert gas into the membrane bag will not affect other tissue structures inside the membrane bag. At the same time, the content of inert gases in the air is very small and will not affect the subsequent detection accuracy. In addition, inert gases are relatively harmless, and a small amount of use will not pose a threat to the health of the staff.
[0038] Of course, in other embodiments, other highly sensitive identification gases can also be used as the medium gas, such as the odorant tetrahydrothiophene and so on.
[0039] In one embodiment, the medium gas is helium.
[0040] Specifically, the mass of helium is lighter than that of nitrogen, oxygen, and carbon dioxide in the air, and the mass difference is relatively large. Therefore, the membrane bag can be placed with the opening facing down first, and then helium is filled into the membrane bag. At this time, because the mass of helium is lighter, it flows upward and fills the bottom of the membrane bag, while some of the nitrogen, oxygen, and carbon dioxide in the air inside the membrane bag are squeezed out of the membrane bag, thus realizing the filling of the medium gas. And because the medium gas is helium, the above filling method is simple and effective.
[0041] Of course, in other embodiments, the medium gas can also be other inert gases, such as argon. And in addition to the above gas introduction method, some gas inside the membrane bag can also be extracted in advance, and then an inert gas is introduced into the membrane bag.
[0042] In one embodiment, it is 1% - 50% of the ratio of the volume of the medium gas to the volume of the membrane bag. Specifically, the ratio of the medium gas to the volume of the membrane bag can be 1%, 2%, 5%, 8%, 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50%. Exemplarily, the ratio of the medium gas to the volume of the membrane bag is 5%. Exemplarily, the ratio of the medium gas to the volume of the membrane bag is 10%. Exemplarily, the ratio of the medium gas to the volume of the membrane bag is 20%.
[0043] Specifically, the magnitude of the ratio of the volume of the medium gas to the volume of the membrane bag affects the amount of the medium gas introduced into the membrane bag, and further affects the content of the medium gas in the hermetically sealed package after encapsulation. The content of the medium gas in the hermetically sealed package further affects the content of the medium gas leaked from the hermetically sealed package under the leakage state, and further affects the subsequent identification of the medium gas. By increasing the ratio of the medium gas to the volume of the membrane bag, the accuracy of subsequent identification of the medium gas can be further improved.
[0044] In one embodiment, the introduction position of the medium gas is at the bottom seal away from the opening of the membrane bag.
[0045] Specifically, the bottom seal of the membrane bag is the side of the membrane bag away from the opening. For example, when the membrane bag is rectangular, its opening and bottom seal are respectively located at a pair of opposite sides of the membrane bag.
[0046] The medium gas is introduced into the membrane bag through a gas pipeline, and the introduction position of the medium gas is the position of the gas pipeline port. In this embodiment, by deeply inserting the port position of the gas pipeline to the bottom seal of the membrane bag, in this way, it can be avoided that the medium gas is dispersed into the air without entering the membrane bag due to the extrusion of the gas in the membrane bag, so as to ensure the ratio of the introduced medium gas to the volume of the membrane bag.
[0047] Refer to Figure 1-2 , in a specific embodiment of the present invention, the hermetically sealed package is a vacuum insulation panel 1.
[0048] The vacuum insulation panel 1 generally includes membrane materials 11, 12, getter 13 and / or desiccant 13. Its processing procedures mainly include forming a membrane bag with an opening by using the membrane material 11, loading 12, getter 13 and / or desiccant 13 into the membrane bag from the opening, evacuating and heat-sealing the opening of the membrane bag, rolling flat and pasting the folded edge 14 on the outer periphery of the membrane bag to one side of the membrane bag through the connecting member 15 to obtain the vacuum insulation panel 1. In this application, the medium gas can be introduced into the membrane bag at any process between the process of forming a membrane bag with an opening and the evacuation process, so as to obtain a vacuum insulation panel 1 that can facilitate micro-leakage detection.
[0049] In the evacuation process, part of the medium gas is evacuated from the membrane bag together with the air, and part of the medium gas still remains in the membrane bag. The remaining medium gas can be used for subsequent micro-leakage detection.
[0050] Referring to Figure 3 , the second aspect of the present invention further provides a detection device 2 for the micro-leakage detection method of the hermetic package in any one of the above. The detection device 2 includes a suction assembly and a detection assembly. Among them, the suction assembly includes a gas compression tank 23, a suction pump 22 and a suction cup 21 connected to each other. The suction cup 21 is used to adsorb or wrap the hermetic package. The suction pump 22 is used to suck the gas around the hermetic package and store it in the gas compression tank 23; the detection assembly includes a medium gas detector 24 and a digital display 25 connected electrically. The medium gas detector 24 is arranged in the gas compression tank 23 and is used to identify the medium gas and display it through the digital display 25.
[0051] Specifically, in the suction assembly, the compression tank 23, the suction pump 22 and the suction cup 21 are connected through a gas pipeline. Among them, the size of the suction cup 21 is larger than that of the hermetic package, and it can fit, cover or wrap the hermetic package, so as to be able to extract the gas around the hermetic package and the hermetic package itself; the compression tank 23 is a gas storage structure with a sealed cavity, which can compress and store the gas in the sealed cavity; the intake end of the suction pump 22 is connected to the suction cup 21, and the outlet end of the suction pump 22 is connected to the compression tank 23. In this way, when the suction pump 22 is started, it can suck the gas at the suction cup 21 end and transport it through the gas pipeline to the compression tank 23 for compression and storage, thereby realizing the collection of the gas around the hermetic package and the gas near it.
[0052] In the detection assembly, both the medium gas detector 24 and the digital display 25 are electrical components and are electrically connected through wires. Among them, the medium gas detector 24 is installed on the compression tank 23, and the probe of the detector is located in the sealed cavity of the compression tank 23 and can be used to identify the medium gas in the sealed cavity of the compression tank 23; the digital display 25 is arranged outside the compression tank 23, and it can obtain the detection result of the medium gas detector 24 and display the detection result in a digital way. In this way, the staff can judge whether there is a micro-leakage problem with the currently detected hermetic package according to the data displayed on the digital display 25.
[0053] The detection device 2 provided by the present invention is provided with a suction component and a detection component. In this way, the suction component can be used to suck the hermetically sealed package, so as to collect the air outside the hermetically sealed package. The detection component is used to identify the medium gas in the collected gas. If the medium gas is identified, it means that there is a micro-leakage problem with the hermetically sealed package. If the medium gas is not identified, it means that there is no leakage problem with the hermetically sealed package, that is, the hermetically sealed package is well sealed. The above detection device 2 has a simple structure, is convenient to operate, has a fast detection speed and high sensitivity, and the detection will not damage the hermetically sealed package. Therefore, it can greatly improve the detection efficiency and detection accuracy of the micro-leakage detection of the hermetically sealed package. And based on the above characteristics, the full inspection of the hermetically sealed package can be realized, and thus, compared with the prior art, the detection accuracy of the hermetically sealed package is further improved.
[0054] Furthermore, by using the compression tank 23 in the suction component, on the one hand, the volume of the suction component can be reduced, on the other hand, the content of the medium gas can be increased when the medium gas exists in the gas, which is convenient for detection. On the other hand, it can also facilitate the exhaust of the compression tank 23 after a single detection, so as to prepare for the next detection.
[0055] Of course, in other embodiments, the compression tank 23 can also be replaced by other gas storage containers.
[0056] Furthermore, the digital display 25 can be a display device with a digital display screen, or can also be an industrial device such as a computer.
[0057] Furthermore, the digital display 25 can also be a controller, where the controller is electrically connected to the air pump 22 and the medium gas detector 24 respectively. In this way, an automatic detection can be realized by presetting a detection program in the controller and making it control the air pump 22 and the medium gas detector 24 according to the preset program.
[0058] Furthermore, an early warning unit is also provided in the controller. The early warning unit can issue an alarm in real time when a micro-leakage hermetically sealed package is detected.
[0059] In one embodiment, the suction cup 21 is in a disc shape, V shape or pocket shape.
[0060] Specifically, the outer contour of the disc-shaped suction cup 21 is larger than the size of the hermetically sealed package. In this way, when detecting, the disc-shaped suction cup 21 can fit at least one side of the hermetically sealed package, so as to realize the detection of this side.
[0061] The V-shaped suction cup 21 has two parts arranged in a V shape, and the outer contour size of each part is larger than the size of the hermetically sealed package. When detecting, the hermetically sealed package is placed between the two parts of the V-shaped suction cup 21. The two parts are respectively attached to two opposite sides of the hermetically sealed package, and the edges are connected to each other. In this way, the hermetically sealed package is wrapped inside it, so as to realize the overall detection of the hermetically sealed package.
[0062] The pocket-shaped suction cup 21 is arranged in a bag shape, and its outer contour size is larger than that of the airtight package. During detection, the airtight package can be inserted into the pocket-shaped suction cup 21 from the opening, and then the opening of the suction cup 21 is sealed, thus wrapping the airtight package inside, and then realizing the overall detection of the airtight package.
[0063] In one embodiment, the suction cup 21 is made of a hard material, or the suction cup 21 is made of a flexible material.
[0064] Specifically, the suction cup 21 made of a flexible material has a certain deformation space, and thus can be used for the micro-leakage detection of special-shaped airtight packages. During detection, the flexible material can deform according to the shape of the airtight package, and thus can better fit the airtight package. In this way, a smaller suction cup 21 can realize the micro-leakage detection of special-shaped airtight packages.
[0065] The suction cup 21 can also be made of a hard material. At this time, the suction cup 21 has high structural strength, and thus can improve its service life.
[0066] In one embodiment, the medium gas detector 24 is a helium detection sensor.
[0067] The medium gas detector 24 is set according to the medium gas. When the medium gas is helium, the medium gas detector 24 can be a helium sensor. When the medium gas is other gases, the medium gas detector 24 can be a corresponding other sensor.
[0068] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.
Claims
1. A method for detecting micro-leakage of a hermetic package, characterized in that, Including: Introduce a medium gas into the film bag of the hermetic package and heat-seal to obtain the hermetic package; Extract the gas in the hermetic package and its vicinity and perform medium gas identification. When the medium gas is identified, there is a micro-leakage in the hermetic package. When the medium gas is not identified, the hermetic package is well-sealed.
2. The micro-leakage detection method of the hermetic package according to claim 1, characterized in that The medium gas is an inert gas.
3. The micro-leakage detection method of the hermetic package according to claim 1, wherein, The medium gas is helium.
4. The micro-leakage detection method for the hermetic package according to claim 1, characterized in that, 1%-50% of the ratio of the volume of the medium gas to the volume of the film bag.
5. The method for detecting micro-leakage of the hermetic package according to claim 1, wherein The position where the medium gas is introduced is the bottom seal away from the opening of the film bag.
6. The micro-leakage detection method of the hermetic package according to claim 1, characterized in that The hermetic package is a vacuum insulation panel.
7. A detection device, characterized in that, A method for detecting micro-leakage of the hermetic package according to any one of claims 1-6, including: A suction assembly, including a gas compression tank, an air pump and a suction cup connected to each other. The suction cup is used to adsorb or wrap the hermetic package, and the air pump is used to extract the gas in the hermetic package and its surroundings and store it in the gas compression tank; A detection assembly, including a medium gas detector and a digital display connected electrically. The medium gas detector is arranged in the gas compression tank and is used to identify the medium gas and display it through the digital display.
8. The detection device according to claim 7, wherein, The suction cup is in a disc shape, V shape or pocket shape.
9. The detection device according to claim 7, characterized in that The suction cup is made of a hard material, or the suction cup is made of a flexible material.
10. The detection device according to claim 7, characterized in that, The medium gas detector is a helium detection sensor.