Non-penetrating air permeability comparison device

Abstract

The utility model relates to the technical field of air permeability detection, in particular to a non-penetrating air permeability comparison device. The device comprises at least two test cavities which are respectively used for accommodating a medical packaging bag to be tested; the inflating part is connected with the opening of the testing cavity, a pressure adjusting module and an air pressure measuring device are arranged on the inflating part, and the inflating part further comprises an inflating pump and a vacuum pump which are connected with the pressure adjusting module; each test cavity is connected with at least one pressure adjusting module; the clamping device is arranged at the opening of the testing cavity and is used for sealing the bag opening of the medical packaging bag; the color gas storage tank is connected with the inflator pump; according to the device, the air permeability difference can be directly sensed by filling the color gas and observing the color diffusion speed or the air pressure change; the initial air pressure consistency is ensured through the pressure adjusting module, the result is quantified through the air pressure measuring device, and the testing accuracy is improved; the medical packaging bag body can be quickly clamped and sealed through the clamping device without damaging the medical packaging bag, and the device is suitable for online detection of a production line.

Description

Technical Field

[0001] This utility model relates to the field of air permeability testing technology, and in particular to a non-penetrating air permeability comparison device. Background Technology

[0002] Air permeability testing is a crucial aspect of quality control for medical packaging bags and a key step in evaluating the microbial barrier performance of medical packaging materials. Medical packaging bags need to prevent microbial entry under specified conditions, ensuring that the medical devices or drugs inside remain sterile during storage and use. Furthermore, permeable materials must allow sterilization media (such as ethylene oxide, vapor, or gamma rays) to pass through during sterilization while preventing microbial invasion during storage. Air permeability testing verifies whether the material meets these requirements.

[0003] In existing technologies, the air permeability of medical packaging bags is tested using specific instruments, and the results are usually presented as data. Professionals use the test data to determine whether the air permeability of the packaging bag meets the standards. This testing method is relatively conventional, and the personnel interpreting the data need to have a certain level of professional knowledge. There is a lack of a visual testing device suitable for demonstration and display scenarios, allowing non-professionals to understand the data intuitively. Utility Model Content

[0004] To address the aforementioned issues, this utility model provides a non-penetrating air permeability comparison device suitable for comparing the air permeability of unsealed medical packaging bags. The device includes at least two test chambers for accommodating the medical packaging bags to be tested; an inflation unit connected to the opening of each test chamber, equipped with a pressure regulating module and a pressure measuring device, and further including an inflation pump and a vacuum pump connected to the pressure regulating module; at least one pressure regulating module connected to each test chamber; a clamping device located at the opening of each test chamber for sealing the opening of the medical packaging bag; and a color gas storage tank connected to the inflation pump.

[0005] Based on the above scheme, it further includes a heat sealing module integrated on the [1] clamping device, the heat sealing module including a heating band.

[0006] Based on the above solution, the clamping device further includes an elastic closure part with a groove on its inner side to be embedded in the edge of the bag.

[0007] Based on the above solution, the elastic sealing part is further made of silicone or rubber.

[0008] Based on the above scheme, the cross-section of the inflatable part is further defined as olive-shaped, with a ratio of 2 to 3:1 between its major axis and minor axis.

[0009] Based on the above scheme, furthermore, the test chamber is equipped with scale lines.

[0010] Based on the above scheme, the pressure measuring device is further configured as a differential pressure sensor or a barometer.

[0011] Based on the above scheme, the color gas storage tank and the air pump are further designed to be detachable, and the gas stored inside is ozone.

[0012] Based on the above scheme, the test chamber is further made of polycarbonate or polyethylene terephthalate.

[0013] Based on the above scheme, further, the light transmittance of the test cavity is ≥50%.

[0014] Compared with existing technologies, the non-penetrating air permeability comparison device provided by this utility model allows ordinary users to directly perceive differences in air permeability by filling in colored gas and observing the color diffusion rate or air pressure changes, without relying on professional numerical interpretation; the pressure adjustment module ensures the consistency of initial air pressure, and the air pressure measurement device quantifies the results, improving test accuracy; the clamping device can quickly clamp and seal the medical packaging bag without damaging it, making it suitable for online testing on production lines. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 A schematic diagram of the structure of an embodiment provided by this utility model;

[0017] Figure 2 Detailed drawings of the inflation part and clamping device of Embodiment 1 provided by this utility model;

[0018] Figure 3 Detailed drawings of the inflation part and clamping device in Embodiment 2 of this utility model.

[0019] Figure label:

[0020] Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0022] In the description of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] refer to Figure 1-2 Example 1, Figure 1 and 3 As shown in Embodiment 2, the present invention provides a non-penetrating air permeability comparison device, comprising at least two test chambers 100 for respectively accommodating medical packaging bags to be tested; an inflation part 200 connected to the opening of the test chamber 100, having a pressure regulating module 210 and a pressure measuring device 220 thereon, and also including an inflation pump 230 and a vacuum pump 240 connected to the pressure regulating module 210; each test chamber 100 is connected to at least one pressure regulating module 210; a clamping device 300 disposed at the opening of the test chamber 100 for sealing the opening of the medical packaging bag; and a color gas storage tank 500 connected to the inflation pump 230.

[0024] Specifically, in use, such as Figure 1 As shown, two medical packaging bags are fixed to the left and right test chambers 100 respectively, and the bag openings are sealed by the clamping device 300; the air inside the bags is extracted by the vacuum pump 240 to make the air pressure inside the two bags the same (so that a certain amount of air is retained inside the bags); the colored gas is filled into the two bags by the inflation pump 230 to the same initial air pressure; after the inflation stops, the air pressure drop value per unit time is recorded by the air pressure measuring device 220 to obtain the observation results.

[0025] In Example 1, as Figure 2 As shown, it also includes a heat sealing module integrated on the clamping device 300, the heat sealing module including a heating band 310.

[0026] By adopting the above solution, the opening of the medical packaging bag is connected to the inflation part 200 by heat fusion. After the test, when the packaging bag is removed, the heating belt 310 is heated again to separate the opening of the packaging bag from the inflation part 200, so as to realize the reuse of the packaging bag.

[0027] In Example 2, as Figure 3 As shown, the clamping device 300 also includes an elastic closure portion 320, the inner side of which is provided with a groove 321 to be embedded into the edge of the bag.

[0028] Using the above solution, the clamping device 300 is used to seal the medical packaging bag, and the groove 321 makes the packaging bag fit more tightly with the inflation part 200.

[0029] It should be noted that the shape of the groove 321 includes, but is not limited to, the solution provided in this embodiment 2. Those skilled in the art can change the shape of the groove 321 according to actual needs to make the inflation part 200 fit more tightly with the medical packaging bag.

[0030] Preferably, the elastic closure 320 is made of silicone or rubber.

[0031] Using silicone or rubber materials allows for a tighter fit between the packaging bag and the inflatable part 200.

[0032] Preferred, such as Figure 2 or Figure 3 As shown, the cross-section of the inflatable part 200 is olive-shaped, and the ratio of its major axis to its minor axis is 2 to 3:1.

[0033] By adopting the above solution, the cross-section of the inflatable part 200 is set to an olive shape, which makes it easier for the clamping device 300 to clamp the packaging bag and the inflatable part 200.

[0034] Preferred, such as Figure 1 As shown, the test chamber 100 is equipped with a scale line 400.

[0035] The purpose of adopting the above scheme is that ozone has a relative molecular mass of 48 and air has a relative molecular mass of 29. When ozone leaks out of the medical packaging bag, it will sink to the bottom of the test chamber 100. Therefore, a scale is set to indicate the volume of leaked ozone for comparison, which facilitates the quantification of results.

[0036] Preferably, the pressure measuring device 220 is a differential pressure sensor or a barometer.

[0037] Using the above scheme, at the start of the measurement, the initial air pressure can be kept consistent by the air pressure measuring device 220; the air pressure measurement device 220 can also be used to record the air pressure drop value per unit time to judge the air permeability of the packaging bag.

[0038] Preferably, the color gas storage tank 500 and the air pump 230 are detachably installed, and the gas stored inside is ozone.

[0039] Using the above solution, the color gas storage tank 500 and the air pump 230 are detachable, which facilitates the replacement of the color gas storage tank and is suitable for online detection in medical packaging bag production lines. Ozone is a pale blue gas, and users can obtain the difference in air permeability between two medical packaging bags by observing the speed at which the gas diffuses from the inside of the bag to the outside.

[0040] Preferably, the test chamber 100 is made of polycarbonate or polyethylene terephthalate.

[0041] Using the above method, polycarbonate or polyethylene terephthalate has good chemical stability, can withstand the strong oxidizing properties of ozone, and extends the service life of the test chamber 100.

[0042] Preferably, the light transmittance of the test cavity 100 is ≥50%.

[0043] More preferably, the light transmittance of the test cavity 100 is ≥80%.

[0044] Using the above method, the light transmittance of the test chamber 100 is ≥80%, which allows users to observe the gas color diffusion with the naked eye through the test chamber 100, making it easy to judge the differences in air permeability of different medical packaging bags.

[0045] In summary, the non-penetrating air permeability comparison device provided by this utility model allows ordinary users to directly perceive differences in air permeability by filling in colored gas and observing the color diffusion rate or air pressure changes, without relying on professional numerical interpretation; the pressure adjustment module ensures the consistency of initial air pressure, and the air pressure measurement device quantifies the results, improving test accuracy; the clamping device can quickly clamp and seal the medical packaging bag without damaging it, making it suitable for online testing on production lines.

[0046] Although this document frequently uses terms such as test chamber, pressure measuring device, medical packaging bag, air pump, and vacuum pump, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this invention; interpreting them as any additional limitation would contradict the spirit of this invention.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A non-permeable air permeability comparison device, characterized in that, include: At least two test chambers (100) are used to respectively accommodate the medical packaging bag to be tested; an inflation part (200) is connected to the opening of the test chamber (100) and is provided with a pressure regulating module (210) and a pressure measuring device (220), and also includes an inflation pump (230) and a vacuum pump (240) connected to the pressure regulating module (210); at least one pressure regulating module (210) is connected to each test chamber (100); a clamping device (300) is provided at the opening of the test chamber (100) for sealing the opening of the medical packaging bag; and also includes a color gas storage tank (500) connected to the inflation pump (230).

2. The non-penetrating air permeability comparison device according to claim 1, characterized in that: It also includes a heat sealing module integrated on the clamping device (300), the heat sealing module including a heating band (310).

3. The non-permeable air permeability comparison device according to claim 1, characterized in that: The clamping device (300) also includes an elastic closure (320) with a groove (321) on its inner side to be embedded in the edge of the bag.

4. The non-permeable air permeability comparison device according to claim 3, characterized in that: The elastic closure (320) is made of silicone or rubber.

5. The non-permeable air permeability comparison device according to claim 1, characterized in that: The cross-section of the inflatable part (200) is olive-shaped, and the ratio of its major axis to its minor axis is 2 to 3:

1.

6. The non-permeable air permeability comparison device according to claim 1, characterized in that: The test chamber (100) is provided with scale lines (400).

7. The non-penetrating air permeability comparison device according to claim 1, characterized in that: The pressure measuring device (220) is a differential pressure sensor or a barometer.

8. The non-permeable air permeability comparison device according to claim 1, characterized in that: The color gas storage tank (500) and the air pump (230) are detachable and the gas stored inside is ozone.

9. The non-permeable air permeability comparison device according to claim 1, characterized in that: The test chamber (100) is made of polycarbonate or polyethylene terephthalate.

10. The non-permeable air permeability comparison device according to claim 1, characterized in that: The light transmittance of the test cavity (100) is ≥50%.

Images