Variable area gas permeation cell structure, gas permeation tester and method of operation

Abstract

The application provides a variable-area gas permeation cell structure, a gas permeation tester and a working method. The gas permeation cell structure comprises a first test cavity and a second test cavity. The first test cavity is provided with a first groove, and the second test cavity is provided with a second groove. The opening of the first groove is opposite to the opening of the second groove. A sample support is arranged in the second groove. The sample support is used for placing a sample between the opening of the first groove. The application further comprises a first sealing element arranged between the first test cavity and the sample, and a second sealing element arranged between the sample support and the second test cavity. The application can conveniently replace the test area, and meets the test requirements of customers for samples with different test areas.

Description

Technical Field

[0001] This invention relates to the field of gas permeation testing technology, and in particular to a variable area gas permeation cell structure, a gas permeation tester, and an operating method. Background Technology

[0002] The statements in this section are merely background information related to the present invention and do not necessarily constitute prior art.

[0003] Gas permeability testing systems are used in gas permeation testing, and one of the core components of such systems is the gas permeation cell. For example, Chinese patent CN202011049632.9 discloses a multi-cavity test structure, system, and method for thin-film permeation testing, which includes at least one set of test units. Each set of test units includes two symmetrically arranged test chambers, and each test chamber is equivalent to a gas permeation cell.

[0004] A typical gas permeation cell structure consists of two parts: a first test chamber and a second test chamber. Each test chamber has a fixed test area.

[0005] The inventors discovered that users may need to change the test area during actual testing. However, the first and second test chambers are connected by complex pipes and lines, making it very difficult to disassemble and replace the two test chambers. Therefore, the current gas permeation cell structure cannot meet the customer's need to change the test area. In addition, the vent holes of common gas permeation cells are generally straight holes, which will cause the formation of airflow dead zones in areas far from the vent holes. Only the test gas near the vent holes enters the vent holes, thus affecting the test accuracy of the gas permeation cell. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a variable-area gas permeation cell structure, a gas permeation tester, and an operating method, which allows for easy replacement of the test area and meets customers' testing needs for samples with different test areas.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] The first aspect of the present invention provides a gas permeation cell structure with variable area.

[0009] A variable area gas permeation cell structure includes: a first test chamber and a second test chamber, the first test chamber having a first groove and the second test chamber having a second groove, the openings of the first groove and the openings of the second groove being opposite to each other.

[0010] The second groove is provided with a sample support, and the space between the sample support and the opening of the first groove is used to place the sample.

[0011] It also includes a first seal for placement between the first test chamber and the sample, and a second seal for placement between the sample support and the second test chamber.

[0012] Furthermore, the first test chamber has at least one air passage communicating with the first groove, and the air passage near the first groove has a flow guide structure.

[0013] Furthermore, the second test chamber has at least one air passage communicating with the second groove, and the air passage near the second groove has a flow guide structure.

[0014] Furthermore, the sample support is equipped with a flow guiding structure.

[0015] Furthermore, the flow guiding structure is a cone-shaped or stepped structure with a gradually increasing cross-sectional area.

[0016] The second aspect of the present invention provides a method for operating a variable area gas permeation cell structure, which utilizes the variable area gas permeation cell structure described in the first aspect of the present invention to change the test area by altering the sample support and the first test chamber.

[0017] A third aspect of the present invention provides a variable area gas permeation cell structure, comprising: a first test chamber and a second test chamber, wherein the first test chamber has a first groove and the second test chamber has a second groove, and the openings of the first groove and the second groove are positioned opposite each other.

[0018] The second groove is provided with a sample support, and the space between the sample support and the opening of the first groove is used to place the sample.

[0019] It also includes a sample clamping member disposed between the first test chamber and the sample, a first sealing member for being placed between the first test chamber and the sample clamping member, and a second sealing member for being placed between the sample support member and the second test chamber.

[0020] Furthermore, the first test chamber has at least one air passage communicating with the first groove, and the air passage near the first groove has a flow guide structure.

[0021] Furthermore, the second test chamber has at least one air passage communicating with the second groove, and the air passage near the second groove has a flow guide structure.

[0022] Furthermore, the sample support is equipped with a flow guiding structure.

[0023] Furthermore, the flow guiding structure is a cone-shaped or stepped structure with a gradually increasing cross-sectional area.

[0024] Furthermore, it also includes a third seal disposed between the sample clamping member and the sample.

[0025] The fourth aspect of the present invention provides a method for operating a variable area gas permeation cell structure, which utilizes the variable area gas permeation cell structure described in the third aspect of the present invention to change the test area by altering the sample support and sample clamping components.

[0026] The fifth aspect of the present invention provides a gas permeation tester, including the variable area gas permeation cell structure described in the first or third aspect of the present invention; or, using the operating method described in the second or fourth aspect.

[0027] Compared with the prior art, the beneficial effects of the present invention are:

[0028] 1. The variable area gas permeation cell structure, gas permeation tester and operating method described in this invention change the test area of ​​the sample by replacing the sample support with different test areas, thereby realizing flexible transformation of the test area and meeting the customer's testing needs for samples with different test areas.

[0029] 2. The variable area gas permeation cell structure, gas permeation tester, and operating method described in this invention have a flow guiding structure at the position of the gas path of the test chamber near the groove of the test chamber, which enables the gas permeation cell to collect test gas to the maximum extent to improve test accuracy. Attached Figure Description

[0030] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0031] Figure 1 This is a schematic diagram of the variable area gas permeation cell structure provided in Embodiment 1 of the present invention.

[0032] Figure 2 This is a schematic diagram of the variable area gas permeation cell structure provided in Embodiment 4 of the present invention.

[0033] Figure 3 This is a schematic diagram of the variable-area second test cavity structure provided in Embodiments 1 and 4 of the present invention.

[0034] Figure 4 This is a schematic diagram of the structure of the sample support provided in Embodiments 1 and 4 of the present invention.

[0035] The components are: 1. First test chamber; 2. First vent; 3. First seal; 4. Sample; 5. Second test chamber; 6. Second vent; 7. Sample support; 8. Second seal; 9. Sample clamping component; 10. Third seal. Detailed Implementation

[0036] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0037] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0038] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0039] Where there is no conflict, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0040] Example 1:

[0041] like Figure 1 , Figure 3 and Figure 4 As shown, Embodiment 1 of the present invention provides a variable area gas permeation cell structure, including: a first test chamber 1 and a second test chamber 5.

[0042] In this embodiment, the first test chamber 1 and the second test chamber 5 of the gas permeation cell are both provided with corresponding grooves, including the first groove of the first test chamber 1 and the second groove of the second test chamber 5.

[0043] The first test chamber 1 is provided with at least one first vent hole 2 (the first vent hole 2 extends to the outside of the first test chamber 1 through an air passage). One end of the first vent hole 2 is connected to the first groove. At the connection between the first vent hole 2 and the first groove, a tapered or stepped gradually increasing flow guiding structure is also provided to improve gas diffusion efficiency and test accuracy.

[0044] Similarly, the second test chamber 5 is also provided with at least one second vent hole 6 (the second vent hole 6 extends to the outside of the first test chamber 1 through the air passage). One end of the second vent hole 6 is connected to the second groove. At the connection between the second vent hole 6 and the second groove, a tapered or stepped gradually increasing flow guiding structure is also provided to improve gas diffusion efficiency and test accuracy.

[0045] A sample support 7 and a sample 4 are also provided between the first test chamber 1 and the second test chamber 5.

[0046] Specifically, the sample support 7 is placed in the second groove of the second test chamber 5, and a second sealing member 8 is provided between the sample support 7 and the second test chamber 5. The second sealing member 8 is installed in the second sealing member groove provided on the sample support 7.

[0047] The second sealing element 8 is used to seal between the second test chamber 5 and the sample support 7. The sample support 7 is also provided with a flow guiding structure to facilitate the faster diffusion of the gas being tested through the sample into the second groove of the second test chamber 5.

[0048] A sample 4 is disposed between the sample support 7 and the first test chamber 1. A first sealing member 3 is also disposed between the sample 4 and the first test chamber 1. The first sealing member 3 is installed in the first sealing member groove disposed on the first test chamber 1. The first sealing member 3 is used for sealing between the sample 4 and the first test chamber 1.

[0049] Example 2:

[0050] Embodiment 2 of the present invention provides an operation method for a variable area gas permeation cell structure. Using the variable area gas permeation cell structure described in Embodiment 1, the test area is changed by modifying the sample support 7 and the first test chamber 1 before the test.

[0051] Example 3:

[0052] Embodiment 3 of the present invention provides a gas permeation tester, including at least one variable area gas permeation cell structure as described in Embodiment 1; or, using the operating method described in Embodiment 2.

[0053] Example 4:

[0054] like Figure 2 , Figure 3 and Figure 4 As shown, Embodiment 4 of the present invention provides a variable area gas permeation cell structure, including: a first test chamber 1 and a second test chamber 5.

[0055] In this embodiment, the first test chamber 1 and the second test chamber 5 of the gas permeation cell are both provided with corresponding grooves, including the first groove of the first test chamber 1 and the second groove of the second test chamber 5.

[0056] The first test chamber 1 is provided with at least one first vent hole 2 (the first vent hole 2 extends to the outside of the first test chamber 1 through an air passage). One end of the first vent hole 2 is connected to the first groove. At the connection between the first vent hole 2 and the first groove, a tapered or stepped gradually increasing flow guiding structure is also provided to improve gas diffusion efficiency and test accuracy.

[0057] Similarly, the second test chamber 5 is also provided with at least one second vent hole 6 (the second vent hole 6 extends to the outside of the first test chamber 1 through the air passage). One end of the second vent hole 6 is connected to the second groove. At the connection between the second vent hole 6 and the second groove, a tapered or stepped gradually increasing flow guiding structure is also provided to improve gas diffusion efficiency and test accuracy.

[0058] A sample support 7 and a sample 4 are also provided between the first test chamber 1 and the second test chamber 5.

[0059] Specifically, the sample support 7 is placed in the second groove of the second test chamber 5, and a second sealing member 8 is provided between the sample support 7 and the second test chamber 5. The second sealing member 8 is installed in the second sealing member groove provided on the sample support 7.

[0060] The second sealing element 8 is used to seal between the second test chamber 5 and the sample support 7. The sample support 7 is also provided with a flow guiding structure to facilitate the faster diffusion of the gas being tested through the sample into the second groove of the second test chamber 5.

[0061] It also includes a sample clamping member 9, which is located between the first test chamber 1 and the sample 4. The sample 4 is located between the sample clamping member 9 and the sample support member 7. The first sealing member 3 is installed in the first sealing member groove provided on the first test chamber 1. The first sealing member 3 is located between the first test chamber 1 and the sample clamping member 9 and is used to seal between the first test chamber 1 and the sample clamping member 9.

[0062] A third sealing element 10 is also provided between the sample clamping member 9 and the sample 4. The third sealing element 10 is installed in the third sealing groove provided on the sample clamping member 9 and is used to seal between the sample clamping member 9 and the sample 4.

[0063] Example 5:

[0064] Embodiment 5 of the present invention provides an operation method for a variable area gas permeation cell structure. Using the variable area gas permeation cell structure described in Embodiment 4, the test area can be changed by modifying the sample support and sample clamping components before testing.

[0065] Example 6:

[0066] Embodiment 6 of the present invention provides a gas permeation tester, including at least one variable area gas permeation cell structure as described in Embodiment 4; or, using the operating method described in Embodiment 5.

[0067] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A variable area gas permeation cell structure, Characterized in that: It comprises a first test cavity and a second test cavity, the first test cavity is provided with a first groove, the second test cavity is provided with a second groove, and the opening of the first groove is opposite to the opening of the second groove; A sample support is arranged in the second groove, and the sample support is used to place a sample between the opening of the first groove; It further comprises a first sealing member arranged between the first test cavity and the sample, and a second sealing member arranged between the sample support and the second test cavity; The test area is changed by changing the sample support and the first test cavity; The first test cavity is provided with at least one gas path in communication with the first groove, and the position close to the first groove is a flow guide structure; The second test cavity is provided with at least one gas path in communication with the second groove, and the position close to the second groove is a flow guide structure; The sample support is provided with a flow guide structure, which is a tapered or stepped structure with gradually increasing cross-sectional area.

2. A variable area gas permeation cell structure, Characterized in that: It comprises a first test cavity and a second test cavity, the first test cavity is provided with a first groove, the second test cavity is provided with a second groove, and the opening of the first groove is opposite to the opening of the second groove; A sample support is arranged in the second groove, and the sample support is used to place a sample between the opening of the first groove; It further comprises a sample pressing member arranged between the first test cavity and the sample, a first sealing member arranged between the first test cavity and the sample pressing member, and a second sealing member arranged between the sample support and the second test cavity; The test area is changed by changing the sample support and the sample pressing member; The first test cavity is provided with at least one gas path in communication with the first groove, and the position close to the first groove is a flow guide structure; The second test cavity is provided with at least one gas path in communication with the second groove, and the position close to the second groove is a flow guide structure; The sample support is provided with a flow guide structure, which is a tapered or stepped structure with gradually increasing cross-sectional area.

3. The variable-area gas permeation cell structure of claim 2, characterized in that: It further comprises a third sealing member arranged between the sample pressing member and the sample.

4. A gas permeation tester characterized by: It comprises the variable-area gas permeation cell structure of any one of claims 1-3.

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