A water vapor transmission rate test chamber

Abstract

The utility model relates to material performance test technical field, concretely is a kind of water vapor permeability test cavity. Including test upper cavity, test lower cavity and support, support includes support fixed base, support crossbeam, locking handle and support hook plate, support fixed base one end is linked with test lower cavity, support fixed base other end is rotatably connected with support crossbeam one end, support crossbeam is located above test upper cavity and another end of support crossbeam is rotatably connected with support hook plate, another end of support hook plate is buckled on test lower cavity, the free end of locking handle is rotated through support crossbeam and is connected with test upper cavity;Moisture pipeline enters test upper cavity from support fixed base, test upper cavity and test lower cavity are all connected with the temperature control mechanism that keeps the temperature constant of test upper cavity and test lower cavity.The utility model is applicable to the water vapor permeability test of different thickness sample, and effectively solve test upper cavity pipeline condensation problem.

Description

Technical Field

[0001] This utility model relates to the field of material performance testing technology, specifically a water vapor transmission rate testing chamber. Background Technology

[0002] Water vapor transmission rate is an important indicator for measuring the water vapor barrier performance of materials, and it has wide applications in many fields such as packaging materials, building materials, and electronic materials. Accurate measurement of the water vapor transmission rate of materials is of great significance for evaluating material quality, optimizing product design, and ensuring product quality.

[0003] Currently, water vapor transmission rate testing generally uses standard testing conditions: a test temperature of 38.0℃ and a test humidity of 90.0%RH. Compared to the standard laboratory environment (23.0℃, 50%RH), this is considered high temperature and high humidity. During the test, the test chamber needs to be heated, and humidified test gas is delivered to the high humidity side of the test chamber through a pipeline. If the pipeline is not well insulated, water vapor can easily condense inside. In current products, to prevent condensation on the high humidity side of the test chamber, the pipeline passes through the low humidity side, and the test chamber insulates the pipeline to prevent condensation inside the gas pipe. This test chamber structure features a set of moisture inlets and outlets on one side of the high-humidity chamber and another set on the other side. The low-humidity chamber has its own inlet and outlet, connected to both sets of inlets and outlets. Moisture enters the high-humidity test chamber through the inlet and exits through the other set of inlets and outlets from the low-humidity test chamber. A surface seal is typically used between the high-humidity and low-humidity test chambers to seal the inlets and outlets. While this structure allows for insulation of the moisture delivery pipeline within the test chamber, the surface seal restricts the test chamber to specific sample thicknesses, generally limiting testing to samples up to 0.5 mm. For samples of different thicknesses, the test chamber's adaptability is poor, often requiring replacement with different chambers or complex adjustments, resulting in cumbersome and inefficient operations that cannot meet the need for rapid and efficient testing of samples of various thicknesses. Utility Model Content

[0004] In view of the shortcomings of the existing technology, this utility model provides a water vapor transmission rate test chamber, which is suitable for testing the water vapor transmission rate of samples of different thicknesses and effectively solves the problem of condensation in the test chamber pipeline.

[0005] To solve the aforementioned technical problem, the present invention adopts the following technical solution: a water vapor transmission rate testing chamber, comprising an upper testing chamber, a lower testing chamber, and a support. The support includes a support fixing seat, a support beam, a locking handle, and a support hook plate. One end of the support fixing seat is connected to the lower testing chamber, and the other end of the support fixing seat is rotatably connected to one end of the support beam. The support beam is located above the upper testing chamber, and the other end of the support beam is rotatably connected to the support hook plate. The other end of the support hook plate is fastened to the lower testing chamber. The free end of the locking handle rotates through the support beam and connects to the upper testing chamber. The support fixing seat has a slot I for the passage of a moisture pipe. The upper testing chamber has a heat-insulating channel for the passage of a moisture pipe, as well as a moisture inlet and a moisture outlet connected to the heat-insulating channel. The lower testing chamber has a carrier gas inlet and a carrier gas outlet. Both the upper and lower testing chambers are connected to a temperature control mechanism to maintain a constant temperature in the upper and lower testing chambers.

[0006] Furthermore, the bracket fixing seat and the bracket crossbeam are connected by a bracket folding plate. One end of the bracket folding plate is rotatably connected to the bracket fixing seat, and the other end of the bracket folding plate is connected to the bracket crossbeam. The bracket folding plate has a slot II for the moisture pipeline to pass through.

[0007] Furthermore, both slot I and slot II are fitted to the upper cavity of the test chamber.

[0008] Furthermore, slot I and slot II are U-shaped, with the opening of slot I facing the upper test cavity.

[0009] Furthermore, the temperature control mechanism includes a temperature control chamber, a temperature sensor, and a circulating bath temperature control device. The temperature control chamber includes an upper temperature control chamber and a lower temperature control chamber. The upper temperature control chamber is located in the upper test chamber, and the lower temperature control chamber is located in the lower test chamber. The temperature sensor is located in both the upper and lower test chambers. Both the upper and lower temperature control chambers are equipped with a circulating medium interface that is connected to the circulating bath temperature control device.

[0010] Furthermore, both the upper and lower controlled greenhouses are connected to cover plates.

[0011] Furthermore, a connecting seat is provided at the position where the upper cavity of the test is connected to the locking handle. The connecting seat has a rotating space and a through hole connected to the rotating space. The free end of the locking handle passes through the through hole and extends into the rotating space. A limit block is connected to the free end of the locking handle. The diameter of the limit block is larger than the diameter of the through hole.

[0012] Furthermore, the test chamber has two heat preservation channels, which are connected to the moisture inlet and moisture outlet, respectively.

[0013] Furthermore, the lower cavity of the test chamber has a groove, and the lower end of the bracket hook plate is fastened into the groove.

[0014] The beneficial effects of this utility model are as follows: This utility model passes the moisture pipeline through the bracket fixing seat and the bracket folding plate, and the moisture pipeline no longer passes through the lower test chamber. Therefore, the sealing rings of the upper test chamber and the air inlet / outlet of the lower test chamber can be omitted, and the sealing problem can be eliminated. Furthermore, the upper test chamber can press the sample under the drive of the locking handle, so that samples of different thicknesses can be installed and fixed conveniently without replacing the test chamber or making complex adjustments, which greatly improves the efficiency and applicability of the test.

[0015] The moisture pipeline passes through the support base, the support folding plate, and the upper test chamber. The upper test chamber is equipped with a temperature control mechanism. The slots on the support base and the support folding plate are designed to fit the upper test chamber, allowing the temperature of the upper test chamber to be transferred to the support base and the support folding plate. This ensures that the entire transmission path of the moisture pipeline is within the set temperature range, meaning that the pipeline temperature is consistent with the test temperature. This effectively prevents water vapor from condensing on the inner wall of the pipeline, ensuring the accuracy of the test results.

[0016] The temperature control mechanism can precisely control the temperature inside the test chamber with a small temperature fluctuation range, providing a stable test environment for water vapor transmission rate testing and helping to improve the accuracy and stability of the test. Attached Figure Description

[0017] Figure 1 A schematic diagram of the existing water vapor transmission rate test chamber;

[0018] Figure 2 This is a schematic diagram of the overall structure of the test chamber described in Example 1;

[0019] Figure 3 This is a schematic diagram of the test chamber in the open state as described in Example 1;

[0020] Figure 4 This is a cross-sectional view of the test chamber in the open state as described in Example 1;

[0021] Figure 5 This is a structural schematic diagram of the bracket fixing seat;

[0022] Figure 6 This is a schematic diagram of the structure of the bracket folding plate;

[0023] Figure 7 A cross-sectional view of the bracket fixing seat and the bracket folding plate in the closed state;

[0024] Figure 8 A cross-sectional view of the bracket fixing seat and the bracket folding plate in the open state;

[0025] Figure 9 This is a cross-sectional schematic diagram of the heat preservation channel and the moisture channel when the test chamber is closed;

[0026] Figure 10 This is a cross-sectional view of the support fixture when the test chamber is closed.

[0027] Figure 11 This is a rear view diagram of the test chamber in the closed state;

[0028] Figure 12 A cross-sectional view for testing the superior cavity;

[0029] Figure 13 A magnified view of the connection point between the upper cavity and the locking handle for testing purposes;

[0030] In the diagram: 01, upper test chamber; 02, lower test chamber; 03, moisture inlet pipe; 04, moisture outlet pipe; 05, moisture pipe; 06, surface seal ring; 07, test space seal ring; 08, carrier gas pipe.

[0031] 11. Test upper cavity; 12. Test lower cavity; 13. Test upper cavity circulating medium interface; 14. Test lower cavity circulating medium interface; 15. Bracket fixing seat; 16. Bracket folding plate; 17. Bracket crossbeam; 18. Locking handle; 19. Rotating shaft; 110. Bracket hook plate; 111. Slot; 112. Moisture inlet; 113. Moisture outlet; 114. Carrier gas inlet; 115. Carrier gas outlet; 116. Upper cavity cover; 117. Upper control chamber; 118. Moisture pipeline; 119. Insulation channel; 120. Lower cavity cover; 121. Lower control chamber; 122. Slot I; 123. Slot II; 124. Connecting seat; 125. Rotation space; 126. Through hole; 127. Limiting block. Detailed Implementation

[0032] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0033] Example 1

[0034] Figure 1This is a schematic diagram of the existing water vapor transmission rate test chamber, including an upper test chamber 01 (high humidity side) and a lower test chamber 02 (low humidity side). The lower test chamber 02 is equipped with a moisture inlet pipe 03 and a moisture outlet pipe 04. Moisture enters through the moisture inlet pipe 03, passes through the lower test chamber 02 and the upper test chamber 01, and then enters the test space of the upper test chamber. After entering the test space, the moisture permeates through the sample and enters the test space of the lower test chamber. Carrier gas enters the lower test chamber through the carrier gas pipe 08, carrying away the permeated moisture to complete the test. Moisture remains flowing within the test space of the upper test chamber 01, and the flowing moisture is discharged through the moisture outlet pipe 04 via the moisture outlet pipe 05. To prevent moisture leakage, a surface sealing ring 06 is provided between the upper test chamber 01 and the lower test chamber 02, and a test space sealing ring 07 is provided outside the test space. When the sample between the upper test chamber 01 and the lower test chamber 02 is too thick, it will lift the upper test chamber 01, preventing the upper test chamber 01 and the lower test chamber 02 from contacting each other and affecting the sealing of moisture transport. Therefore, it can be seen that the existing water vapor transmission rate test chamber cannot adapt to samples of different thicknesses.

[0035] To address this problem, this invention proposes a novel water vapor transmission rate testing chamber, such as... Figure 2 As shown, the system includes an upper test chamber 11, a lower test chamber 12, and a support. The support includes a support fixing seat 15, a support folding plate 16, a support crossbeam 17, a locking handle 18, and a support hook plate 110. One end of the support fixing seat 15 is fixedly connected to the lower test chamber 12, and the other end of the support fixing seat 15 is rotatably connected to the lower end of the support folding plate 16. The upper end of the support folding plate 16 is connected to the support crossbeam 17. The support crossbeam 17 is located above the upper test chamber 11, and the other end of the support crossbeam 17 is rotatably connected to the support hook plate 110 via a rotating shaft 19. The other end of the support hook plate 110 is fastened to a groove 111 in the lower test chamber 12. The free end of the locking handle 18 rotates through the support crossbeam 17 and connects to the upper test chamber 11.

[0036] like Figure 5 , 6 As shown, to allow the moisture pipe to pass through, the bracket fixing seat 15 has a slot I122 for the moisture pipe to pass through, and the bracket folding plate 16 has a slot II123 for the moisture pipe to pass through. Both slots I122 and II123 are fitted into the upper test cavity 11, and both slots I122 and II123 are U-shaped, with the opening of slot I122 facing the upper test cavity 11. In other embodiments, the shapes of slots I122 and II123 can be designed to allow the moisture pipe to pass through. Furthermore, the upper test cavity, the bracket fixing seat, and the bracket folding plate are all made of metal. Metal has good thermal conductivity, and the temperature of the bracket fixing seat and the bracket folding plate is close to the temperature control temperature of the upper test cavity, thereby controlling the temperature of the moisture pipe passing through the slots and preventing condensation.

[0037] like Figure 3 , 4 As shown, the upper test chamber 11 has an insulated channel 119 through which the moisture pipe 118 passes, and a moisture inlet 112 and a moisture outlet 113 connected to the insulated channel 119. The lower test chamber 12 has a carrier gas inlet 114 and a carrier gas outlet 115. In order to avoid condensation, both the upper test chamber 11 and the lower test chamber 12 are connected to a temperature control mechanism to keep the temperature of the upper test chamber 11 and the lower test chamber 12 constant.

[0038] In this embodiment, the temperature control mechanism includes a temperature control chamber, a temperature sensor, and a circulating bath temperature control device, such as... Figure 4 As shown, the temperature control chamber includes an upper temperature control chamber 117 and a lower temperature control chamber 121. The upper temperature control chamber 117 is located in the upper test chamber 11, and the lower temperature control chamber 121 is located in the lower test chamber 12. Temperature sensors are installed in both the upper test chamber 11 and the lower test chamber 12. Figure 2 As shown, both the upper and lower controlled-temperature chambers are equipped with circulating medium interfaces 13 / 14 that are connected to the circulating bath temperature control device. In this embodiment, the upper controlled-temperature chamber 117 is connected to an upper cavity cover plate 116, and the lower controlled-temperature chamber 121 is connected to a lower cavity cover plate 120.

[0039] like Figure 7 , 8 As shown in Figures 9 and 10, the moisture pipe 118 passes through the slot I of the bracket fixing seat 15 and the slot 123 of the bracket folding plate 16, and enters the heat preservation channel 119 of the upper test chamber 11. When the bracket fixing seat 15 and the bracket folding plate 16 are in the closed state, the moisture pipe 118 is bent, thereby entering the heat preservation channel 119 of the upper test chamber 11. When the bracket fixing seat 15 and the bracket folding plate 16 are in the open state, the moisture pipe 118 is straightened. The opening or closing of the upper test chamber 11 will not affect the state of the moisture pipe 118.

[0040] like Figure 11 , 12 As shown, the upper chamber 11 of the test has two heat preservation channels 119, which are connected to the moisture inlet 112 and the moisture outlet 113 respectively, forming a complete moisture transport channel.

[0041] like Figure 13As shown, a connecting seat 124 is provided at the position where the upper test cavity 11 connects to the locking handle 18. The connecting seat 124 has a rotation space 125 and a through hole 126 connected to the rotation space 125. The free end of the locking handle 18 passes through the through hole 126 and extends into the rotation space 125. A limiting block 127 is connected to the free end of the locking handle 18, and the diameter of the limiting block 127 is larger than the diameter of the through hole 126. This design allows the upper test cavity 11 to be pressed by the locking handle 18 when rotating, thereby clamping the sample. Alternatively, when the bracket hook plate 110 is opened, the bracket simultaneously lifts the upper test cavity 11.

[0042] The testing process of the test chamber described in this embodiment is as follows: First, the support hook plate 110 is removed from the groove 111 of the lower test chamber 12. The support folding plate 110 rotates around the rotating shaft 19, driving the support beam 17 and the upper test chamber 11 to move upward, thus opening the chamber. The test sample is placed between the upper and lower test chambers. The support hook plate 110 is moved downward and locked into the groove 111, thus closing the chamber. The locking handle 18 is rotated, which drives the upper test chamber 11 to move downward, thereby clamping the sample. The humidified moisture enters the upper test chamber through the slot I122 of the support fixing seat 15 and the slot II123 of the support folding plate 16. The temperature control chamber of the upper test chamber ensures that the moisture pipeline is always within the set temperature range. The moisture enters the test space of the upper test chamber. After entering the test space, the moisture passes through the sample and enters the test space of the lower test chamber 12. The carrier gas enters the lower test chamber through the carrier gas inlet 08 and carries away the moisture through the carrier gas outlet, thus completing the test. Moisture is kept flowing in the test space of the upper test chamber 11, and the flowing moisture is discharged from the moisture outlet through the moisture pipe.

[0043] This invention allows the moisture pipeline 118 to pass through the bracket fixing seat 15 and the bracket folding plate 16, and the moisture pipeline 118 no longer passes through the lower test chamber 12. Therefore, the sealing rings of the air inlet / outlet of the upper test chamber 11 and the lower test chamber 12 can be omitted, and the sealing problem can be eliminated. Furthermore, the upper test chamber 11 can press the sample under the drive of the locking handle 18, thereby facilitating the installation and fixing of samples of different thicknesses without the need to replace the test chamber or make complex adjustments, which greatly improves the efficiency and applicability of the test.

[0044] The moisture pipeline 118 passes through the bracket fixing seat 15, the bracket folding plate 16, and the upper test chamber 11. The upper test chamber 11 is equipped with a temperature control mechanism. The slots on the bracket fixing seat 15 and the bracket folding plate 16 are all set to fit the upper test chamber 11, so that the temperature of the upper test chamber can be transferred to the bracket fixing seat 15 and the bracket folding plate 16. This ensures that the entire transmission path of the moisture pipeline is within the set temperature range, that is, the pipeline temperature is consistent with the test temperature, effectively preventing water vapor from condensing on the inner wall of the pipeline and ensuring the accuracy of the test results.

[0045] Therefore, this invention is particularly suitable for testing the water vapor transmission rate of samples of different thicknesses, and effectively solves the problem of condensation in the test chamber pipeline. It can solve the problems of inconvenient testing of samples of different thicknesses and easy condensation in the test chamber pipeline in the prior art, improve the accuracy and efficiency of the test, and enhance the applicability and reliability of the equipment.

[0046] The above description is only the basic principle and preferred embodiment of this utility model. Any improvements and substitutions made by those skilled in the art based on this utility model shall fall within the protection scope of this utility model.

Claims

1. A water vapor transmission rate test chamber characterized by: The test chamber includes an upper test chamber, a lower test chamber, and a support. The support includes a support base, a support beam, a locking handle, and a support hook plate. One end of the support base is connected to the lower test chamber, and the other end is rotatably connected to one end of the support beam. The support beam is located above the upper test chamber, and the other end of the support beam is rotatably connected to the support hook plate. The other end of the support hook plate is fastened to the lower test chamber. The free end of the locking handle rotates through the support beam and connects to the upper test chamber. The support base has a slot I for the passage of a moisture pipe. The upper test chamber has an insulation channel for the passage of a moisture pipe, as well as a moisture inlet and a moisture outlet connected to the insulation channel. The lower test chamber has a carrier gas inlet and a carrier gas outlet. Both the upper and lower test chambers are connected to a temperature control mechanism to maintain a constant temperature in the upper and lower test chambers.

2. The water vapor transmission rate test chamber of claim 1, wherein: The bracket fixing seat and the bracket crossbeam are connected by a bracket folding plate. One end of the bracket folding plate is rotatably connected to the bracket fixing seat, and the other end of the bracket folding plate is connected to the bracket crossbeam. The bracket folding plate has a slot II for the moisture pipeline to pass through.

3. The water vapor transmission rate test chamber of claim 2, wherein: Both slot I and slot II are fitted to the upper cavity of the test chamber.

4. The water vapor transmission rate test chamber of claim 3, wherein: Slot I and slot II are U-shaped, with the opening of slot I facing the upper test cavity.

5. The water vapor transmission rate test chamber of claim 1, wherein: The temperature control mechanism includes a temperature control chamber, a temperature sensor, and a circulating bath temperature control device. The temperature control chamber includes an upper temperature control chamber and a lower temperature control chamber. The upper temperature control chamber is located in the upper test chamber, and the lower temperature control chamber is located in the lower test chamber. The temperature sensor is located in both the upper and lower test chambers. Both the upper and lower temperature control chambers are equipped with a circulating medium interface that is connected to the circulating bath temperature control device.

6. The water vapor transmission rate test chamber of claim 5, wherein: Both the upper and lower controlled greenhouses are connected to cover plates.

7. The water vapor transmission rate test chamber of claim 1, wherein: The upper cavity of the test chamber is equipped with a connecting seat at the connection position with the locking handle. The connecting seat has a rotation space and a through hole connected to the rotation space. The free end of the locking handle passes through the through hole and extends into the rotation space. The free end of the locking handle is connected to a limit block, and the diameter of the limit block is larger than the diameter of the through hole.

8. The water vapor transmission rate test chamber of claim 1, wherein: The test chamber has two heat-insulating channels, which are connected to the moisture inlet and moisture outlet, respectively.

9. The water vapor transmission rate test chamber of claim 1, wherein: The lower cavity of the test chamber has a groove, and the lower end of the bracket hook plate is fastened into the groove.

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