Testing device

Abstract

The utility model provides a testing device, which is suitable for testing the vapor permeability of a waterproof material, and comprises a shell, the shell comprises a first part and a second part, the opposite first ends of the first part and the second part are provided with openings, a sample to be tested is detachably arranged between the first part and the second part, and the first part and the second part are arranged on the shell; the sample shields the opening in an assembly state, the sample and the first part enclose to form a first chamber, and the sample and the second part enclose to form a second chamber; the steam generating mechanism is arranged in the first chamber and is configured to generate steam; the weighing mechanism is arranged in the second chamber and comprises a water absorption part which is configured to absorb at least one part of steam passing through the sample; and a weighing unit configured to weigh a change in mass of the water absorption unit.

Description

TECHNICAL FIELD

[0001] The at least one embodiment of the utility model relates to a testing device for waterproof material, especially a testing device for vapor permeability of waterproof material. BACKGROUND

[0002] Waterproof material is widely used in the field of construction to meet the requirements of mold and moisture resistance of building structure. In addition to effectively preventing liquid-phase water and vapor-phase water from penetrating from the outside of the building, waterproof material should also have certain vapor permeability to allow part of the water vapor inside the building to be discharged through the waterproof material, thereby preventing mold and corrosion problems caused by the accumulation of water vapor in the building, and improving the comfort and durability of the building.

[0003] To study the vapor permeability of waterproof material, it needs to be tested accordingly. Currently, the test of the vapor permeability of waterproof material is carried out in an indoor environment, and the test conditions are limited by the indoor environment. Because the indoor environment is relatively open, the required test environment is easily disturbed by other factors when it is configured. UTILITY MODEL CONTENT

[0004] To solve the above and other technical problems in the prior art, the utility model provides a testing device for testing the vapor permeability of waterproof material.

[0005] The embodiment of the utility model provides a testing device suitable for testing the vapor permeability of waterproof material, which comprises: a shell comprising a first part and a second part, the first part and the second part are provided with openings at the first ends facing each other, a sample to be tested is detachably arranged between the first part and the second part, the sample covers the opening in the assembled state, the sample and the first part form a first cavity, and the sample and the second part form a second cavity; a steam generating mechanism arranged in the first cavity and configured to generate steam; a weighing mechanism arranged in the second cavity, comprising: a water absorbing part configured to absorb at least part of the steam passing through the sample; and a weighing part configured to weigh the mass change of the water absorbing part.

[0006] In some illustrative embodiments, the testing device comprises a detection mechanism configured to detect the temperature difference between the first cavity and the second cavity.

[0007] In some illustrative embodiments, the detection mechanism is further configured to detect the humidity difference between the first cavity and the second cavity.

[0008] In some illustrative embodiments, the detecting mechanism comprises a first temperature and humidity sensor, a detecting end of the first temperature and humidity sensor being arranged in the first chamber; and a second temperature and humidity sensor, a detecting end of the second temperature and humidity sensor being arranged in the second chamber.

[0009] In some illustrative embodiments, the testing device further comprises a connecting mechanism arranged between the first part and the second part, configured to connect the first part and the second part, so that the sample is clamped and held by the first part and the second part in the assembled state.

[0010] In some illustrative embodiments, the first part and the second part further comprise an extension part, the extension part being protruded outwardly from the side wall of the first part and the second part; wherein the first part and the second part are connected by the connecting mechanism between the facing extension parts.

[0011] In some illustrative embodiments, the first end of the first part and the second part is provided with a shoulder part extending to the inside of the opening, and the sample is clamped between the shoulder parts formed by the first part and the second part.

[0012] In some illustrative embodiments, the testing device further comprises a sealing member arranged between the sample and the shoulder part, so as to form a seal between the shoulder part and the sample.

[0013] In some illustrative embodiments, the first part and the second part are arranged side by side.

[0014] In some illustrative embodiments, the first part and the second part are arranged in a stack, and the first part is located below the second part.

[0015] According to the testing device provided by the present application, the first part and the second part arranged oppositely are suitable for configuring a sealed environment isolated from the external open environment, so that the sample to be tested is maintained in the sealed environment for testing, so that the testing environment can be configured without being affected by the external open environment. The steam generating mechanism arranged in the first chamber is suitable for generating steam, and the weighing mechanism arranged in the second chamber is suitable for absorbing steam. Since the first chamber and the second chamber are isolated by the sample to be tested, the generated steam can only pass through the sample. The water absorbing part is suitable for absorbing steam, and the weighing part is used for weighing the mass change of the water absorbing part. The mass increment of the water absorbing part can be obtained through the difference of the mass change, and the vapor permeability of the sample can be calculated based on this principle. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a sectional view of a testing device according to an illustrative embodiment of the present application;

[0017] Figure 2 is Figure 1 a schematic view of the appearance of the testing device of the schematic embodiment shown, showing a top view perspective;

[0018] Figure 3 is Figure 2 a schematic view of the A-A perspective of the testing device of the schematic embodiment shown;

[0019] Figure 4 is a sectional view of the testing device according to another schematic embodiment of the present application;

[0020] Figure 5 is Figure 4 a schematic view of the appearance shown.

[0021] In the drawings, the meanings of the reference signs are as follows:

[0022] 1, housing;

[0023] 11, first part;

[0024] 12, second part;

[0025] 13, shoulder part;

[0026] 14, extension part;

[0027] 15, sealing element;

[0028] 2, connecting mechanism;

[0029] 21, screw;

[0030] 22, nut;

[0031] 23, gasket;

[0032] 3, detection mechanism;

[0033] 31, first temperature and humidity sensor;

[0034] 32, second temperature and humidity sensor;

[0035] 4, steam generation mechanism;

[0036] 5, water absorption part;

[0037] 6, weighing part;

[0038] 7, window;

[0039] 8, sample;

[0040] 9, support element. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical scheme and advantages of the utility model clearer and more understandable, the utility model will be further described in detail below in combination with specific embodiments and with reference to the drawings.

[0042] The terms used herein are merely used to describe specific embodiments, and are not intended to limit the utility model. The terms "include", "contain" and the like used herein indicate the existence of the described features, steps, operations and / or components, but do not exclude the existence or addition of one or more other features, steps, operations or components.

[0043] All the terms used herein, including technical and scientific terms, have the meanings generally understood by those skilled in the art, unless otherwise defined. It should be noted that the terms used herein should be interpreted to have meanings consistent with the context of the specification, and should not be interpreted in an idealized or overly formal manner.

[0044] In the case of using expressions similar to "at least one of A, B and C, etc.", it should be generally interpreted in the meaning that the expression is generally understood by those skilled in the art, for example, "a system having at least one of A, B and C" should include but not be limited to a system having A alone, a system having B alone, a system having C alone, a system having A and B, a system having A and C, a system having B and C, and / or a system having A, B, and C, etc. In the case of using expressions similar to "at least one of A, B or C, etc.", it should be generally interpreted in the meaning that the expression is generally understood by those skilled in the art, for example, "a system having at least one of A, B or C" should include but not be limited to a system having A alone, a system having B alone, a system having C alone, a system having A and B, a system having A and C, a system having B and C, and / or a system having A, B, and C, etc.

[0045] In order to study the vapor permeability of waterproof materials, the waterproof and breathable film or waterproof and breathable material can be subjected to steam permeability detection.

[0046] Taking the standard JG / T 309-2011 "Determination and Grading of Steam Permeability of Exterior Wall Coatings" as an example, the test principle is: a certain amount of ammonium dihydrogen phosphate saturated solution is poured into the test cup, so that the relative humidity of the air above the test cup is rapidly increased to 93%. The film-shaped sample to be tested or the porous structure substrate coated with the sample to be tested is used to close the test cup. The mass is weighed at appropriate time intervals, and when the mass change is proportional to the change of time interval, the steam permeability can be determined by the mass change.

[0047] Based on the above standards, it requires a higher test environment. For example, the sample needs to be placed in a room with a temperature of (23±2)℃ and a relative humidity of (50±5)%, and the wind speed in the environment chamber needs to be less than 0.3 m / s. The weighing balance has high accuracy, with an accuracy of 0.001 g. Although the above test requirements are carried out in a sealed room (such as a room with sealed doors and windows), due to the size of the indoor space, the equipment displayed in the room, the operation of the ventilation equipment and / or auxiliary heating equipment, and the sealing of the doors and windows, it takes a long preparation time and complicated operation to configure the above test environment. Therefore, it is not conducive to test the corresponding product (i.e. waterproof and breathable film or waterproof and breathable material) during the production process.

[0048] Therefore, a test device with low external environment requirements, easy to configure a test environment, high test repeatability, and quantitative testing should be provided to test the water vapor transmission performance of the waterproof material.

[0049] Figure 1 is a sectional view of a test device according to an exemplary embodiment of the present application.

[0050] According to the test device provided by the present application, the water vapor transmission performance of the waterproof material can be tested, such as Figure 1 As shown in the drawings, the test device comprises a housing 1, a steam generating mechanism 4 and a weighing mechanism. The housing 1 comprises a first part 11 and a second part 12. The first part 11 and the second part 12 are provided with openings at the first ends facing each other. The sample 8 to be tested is detachably arranged between the first part 11 and the second part 12. The sample 8 in the assembled state covers the openings. The sample 8 and the first part 11 form a first chamber, and the sample 8 and the second part 12 form a second chamber. The steam generating mechanism 4 is arranged in the first chamber and is configured to generate steam. The weighing mechanism is arranged in the second chamber and comprises a water absorbing part 5 and a weighing part 6. The water absorbing part 5 is configured to absorb at least a part of the steam passing through the sample 8. The weighing part 6 is configured to weigh the mass change of the water absorbing part 5.

[0051] In such an embodiment, the oppositely arranged first part 11 and second part 12 are adapted to configure a sealed environment isolated from an open environment outside, so that the sample 8 to be tested is maintained in the sealed environment for testing, thus the test environment can be configured without being affected by the open environment outside (such as the current indoor environment). The steam generating mechanism 4 located in the first chamber is adapted to generate steam (such as water vapor), and the weighing mechanism located in the second chamber is adapted to absorb the steam. Since the first chamber and the second chamber are isolated by the sample 8 to be tested, the generated steam can only pass through the sample 8. The water absorbing part 5 is adapted to absorb the steam, and the weighing part 6 is used to weigh the mass change of the water absorbing part 5. Through the difference of the mass change, the mass increment of the water absorbing part 5 can be obtained, and based on this principle, the vapor permeability of the sample 8 can be quantitatively calculated.

[0052] According to an embodiment of the present application, as shown in Figure 1 The test device further comprises a detection mechanism 3. The detection mechanism 3 is configured to detect the temperature difference between the first chamber and the second chamber.

[0053] According to an embodiment of the present application, as shown in Figure 1 The detection mechanism 3 is further configured to detect the humidity difference between the first chamber and the second chamber.

[0054] According to an embodiment of the present application, as shown in Figure 1 The detection mechanism 3 comprises a first temperature and humidity sensor 31 and a second temperature and humidity sensor 32. The detection end of the first temperature and humidity sensor is arranged in the first chamber, and the detection end of the second temperature and humidity sensor 32 is arranged in the second chamber, so as to detect the temperature and humidity of the first chamber and the second chamber, respectively. It should be understood that the embodiments of the present application are not limited thereto.

[0055] For example, the temperature and humidity sensor arranged in the first chamber or the second chamber can respectively adopt a temperature sensor and a humidity sensor.

[0056] In an exemplary embodiment, as shown in Figure 1 The first part 11 and the second part 12 include but are not limited to structures configured as substantially cubic. In detail, the first part 11 (and the second part 12) each comprises a top plate, a bottom plate and three side plates arranged between the top plate and the bottom plate, wherein the first end (such as Figure 1The right end of the first part 11 and the left end of the second part 12 form an opening. Further, the sample 8 to be tested is arranged between the first part 11 and the second part 12 and is tightly clamped by the first part 11 and the second part 12 to maintain an unfolded state covering the opening. The sample 8 to be tested can be a waterproof and breathable film or a waterproof and breathable material (e.g. a coating), and when the sample 8 to be tested is a waterproof and breathable material, it should be arranged on a water vapor and air permeable substrate (e.g. a non-woven fabric) so that it can have an unfolded state like a film.

[0057] In an exemplary embodiment, as shown in Figure 1 The water absorption part 5 includes but is not limited to the use of a powerful desiccant. In detail, the desiccant includes but is not limited to the use of anhydrous calcium chloride, silica gel dryer or other suitable desiccant for absorbing water. Further, the desiccant needs to be covered in a porous packaging material to maintain the overall state of the desiccant (powder or shell) and not affect the absorption of water vapor.

[0058] In an exemplary embodiment, as shown in Figure 1 The weighing part 6 includes but is not limited to the use of an electronic balance. In detail, an analytical balance, a precision balance, an industrial balance and other suitable devices for weighing the water absorption part 5 can be used, and the accuracy required for testing should be met. Further, the above-mentioned electronic balance should meet the corresponding installation requirements (e.g. placed on a flat work surface, calibrated accordingly, etc.) in the state of being arranged in the second chamber to maintain the accuracy of weighing.

[0059] In an exemplary embodiment, the steam generating mechanism 4 includes but is not limited to the use of a humidifying device, which can be an ultrasonic humidifying device, an evaporative humidifying device, a thermal evaporative humidifying device, a centrifugal humidifying device and other suitable humidifying devices for generating water vapor by treating pure water or aqueous solution (e.g. saturated solution of ammonium dihydrogen phosphate). The above-mentioned steam generating mechanism 4 can be configured with a corresponding liquid storage tank or connected to an external liquid source to continuously generate steam. Further, if necessary, based on the consumption of liquid in the liquid storage tank or the liquid source within the test time, the steam generation amount of the steam generating mechanism 4 can also be quantitatively known.

[0060] In an exemplary embodiment, as shown in Figure 1 At least a part of the first part 11 and the second part 12 should be provided with a window 7 made of transparent material, so that the operator can observe the internal conditions of the first chamber and the second chamber (e.g. to observe whether the steam generating mechanism 4 is working, the display of the weighing part 6, and the display of the detection mechanism 3, etc.) during the test.

[0061] For example, the first part 11 and the second part 12 can be made of transparent materials, including but not limited to acrylic plate, resin, glass and any other transparent material.

[0062] Alternatively, the first part 11 and the second part 12 can be made of transparent materials in part and made of translucent or non-transparent materials in part. In this case, the part of the first part 11 and the second part 12 made of transparent materials (i.e. the formed view window 7) should be able to allow the operator to clearly observe the inside of the first chamber and the second chamber.

[0063] Alternatively, the first part 11 and the second part 12 can be made of translucent or non-transparent materials in whole, but are provided with video acquisition devices (such as cameras with light sources) inside to allow the operator to observe the inside of the first chamber and the second chamber outside the shell 1.

[0064] Based on the steam permeability test of the above-mentioned test device, the following method can be used.

[0065] Operation S100: The first temperature and humidity sensor 31, the second temperature and humidity sensor 32, the weighing part 6 and the steam generating mechanism 4 are debugged and installed in the corresponding chamber (i.e. the first chamber or the second chamber);

[0066] Operation S110: The first part 11, the second part 12 and the sample 8 to be tested are assembled by the connecting mechanism 2 (which will be described in detail in the following embodiments) so that the sample 8 is in an assembled state of being unfolded and sealing the opening;

[0067] Operation S120: Rest for a period of time until the temperature and humidity displayed by the first temperature and humidity sensor 31 and the second temperature and humidity sensor 32 are the same (e.g. R1, which can be regarded as the temperature and humidity of the first chamber and the second chamber being approximately the same), start the test and record the start time (e.g. T1) and the reading of the weighing part 6 (e.g. M1);

[0068] Operation S130: Control the steam generating mechanism 4 to operate and generate water vapor, the humidity of the first chamber displayed by the first temperature and humidity sensor 31 rises, while the humidity of the second chamber displayed by the second temperature and humidity sensor 32 remains basically unchanged (a humidity threshold value can be set through experience or calculation, and if the humidity does not exceed the humidity threshold value, it can be regarded as basically unchanged), but the reading of the weighing part 6 continues to increase (which indicates that the sample 8 has steam permeability, and it can be regarded that all (approximately all) water vapor passing through the sample 8 is absorbed by the water absorbing part 5);

[0069] Operation S140: The steam generating mechanism 4 continues to operate until the humidity of the second chamber displayed by the second temperature and humidity sensor 32 changes significantly (i.e. exceeds the threshold value mentioned above), then the test is stopped and the stopping time (e.g. T2) and the reading of the weighing unit 6 (e.g. M2) are recorded (which can be regarded as the water absorbing unit 5 being saturated or close to saturation and thus unable to further absorb water);

[0070] Operation S150: Calculate the vapor transmission rate V of the sample, specifically as shown in the following Formula 1:

[0071] Formula 1

[0072] In Formula 1, M1 is the mass of the water absorbing unit before absorbing water; M2 is the mass of the water absorbing unit after absorbing water; T1 is the starting time of the test; T2 is the stopping time of the test; S is the surface area of the sample (which can be regarded as the area of the opening formed by the first part or the second part). It should be understood that the above method schematically shows an embodiment of testing the vapor transmission rate of the sample based on the test device, which is not the protection subject of the present application, and the test device can also test the vapor transmission performance of the sample based on other test methods. The test not only includes quantitative test, but also includes qualitative test.

[0073] Further, in another illustrative embodiment, the test device can also be configured with other mechanisms in the first chamber and / or the second chamber to assist the smooth progress of the test.

[0074] For example, an auxiliary heating mechanism (which can be, for example, an electric heating wire, an electric heating sheet, etc.) can be configured to adjust the temperature in the first chamber and / or the second chamber;

[0075] For another example, a flow guiding mechanism (such as a fan, etc.) can be configured to guide the steam to flow directionally between the first chamber and the second chamber. Of course, the auxiliary heating mechanism mentioned above can cause the temperature in the first chamber and the second chamber to be different, which can also cause the pressure in the first chamber and the second chamber to be different, thereby causing the steam to flow directionally under the action of the pressure difference.

[0076] Figure 2 is Figure 1 is a schematic view of the appearance of the test device of the illustrative embodiment, showing a top view.

[0077] According to the embodiment of the present application, as shown in Figure 1 and Figure 2 , the first part 11 and the second part 12 are arranged side by side. That is, the first part 11 and the second part 12 are arranged on a flat mounting surface, and as shown in Figure 1 and Figure 2 , they are arranged opposite to each other.

[0078] Figure 3 is Figure 2A schematic diagram of the test apparatus from the AA perspective of the illustrative embodiment shown.

[0079] According to embodiments of the present invention, such as Figure 2 and Figure 3 As shown, the testing apparatus also includes a connecting mechanism 2. The connecting mechanism 2 is disposed between the first part 11 and the second part 12 and is configured to connect the first part 11 and the second part 12 so that the sample 8 is clamped by the first part 11 and the second part 12 and held in an assembled state.

[0080] According to embodiments of the present invention, such as Figure 3 As shown, the first part 11 and the second part 12 also include an extension 14. The extension 14 protrudes outward from the sidewalls of the first part 11 and the second part 12. The opposing extensions 14 of the first part 11 and the second part 12 are connected by a connecting mechanism 2.

[0081] In one illustrative embodiment, such as Figure 3 and Figure 3 As shown, the extension 14 is disposed at the second end where the first part 11 and the second part 12 are far apart (e.g., Figure 4 The extension 14 is located on the left end of the first part 11 and the right end of the second part 12 (as shown). Specifically, the extension 14 can be a plate-like mechanism, such as being integrally fixed to the opposing side plates of the first part 11 and the second part 12, and protruding from the side plate adjacent to that side plate. Furthermore, a connecting mechanism 2 is provided between the opposing extensions 14 to pull the first part 11 and the second part 12 towards each other, thereby maintaining them in a tightly connected state. Even further, the sample 8 is tightly abutted by the first part 11 and the second part 12 on both sides to maintain it in an unfolded assembly state that covers the opening.

[0082] In one illustrative embodiment, such as Figure 5 As shown, the connecting mechanism 2 includes a screw 21 (with a nut), a nut 22, and a washer 23. Specifically, the screw 21 is inserted through one extension 14 and exits through another opposing extension 14. Furthermore, the end of the screw 21 exiting the extension 14 is secured by the washer 23 and the nut 22.

[0083] According to embodiments of the present invention, such as Figure 4 As shown, the first ends of the first part 11 and the second part 12 are provided with shoulders 13 extending inward toward the opening, and the sample 8 is clamped between the shoulders 13 formed by the first part 11 and the second part 12.

[0084] According to embodiments of the present invention, such as Figure 4 As shown, the testing device also includes a seal 15 disposed between the sample 8 and the shoulder 13, so that the shoulder 13 and the sample 8 form a seal.

[0085] In an illustrative embodiment, as shown in Figure 5 , the shoulder 13 extends inwardly from the side plates of the first part 11 and the second part 12 in a direction perpendicular to the side plates, and the inner edge of the shoulder 13 encloses a substantially rectangular opening. Further, the outer edge of the sample 8 is tightly pressed by the shoulder 13 formed by the first part 11 and the second part 12, so as to be kept in the assembled state of covering the opening under the tension provided by the connecting mechanism 2.

[0086] In an illustrative embodiment, as shown in Figure 4 , the surface of the shoulder 13 facing the sample 8 is provided with an annular sealing groove. In detail, the sealing groove includes but is not limited to a groove structure configured as a substantially rectangle. Further, a sealing member 15 (such as an annular sealing member) matching the shape and size of the sealing groove is fitted in the sealing groove, and tightly abuts against the sample 8 when the sample 8 is assembled. In this way, the sealing member can tightly abut against the surface of the sample 8 and elastically deform under the tension provided by the connecting mechanism 2, so as to form a seal between the sample 8 and the first part 11 and the second part 12, thereby preventing the leakage of steam from the connection position of the sample 8 and the first part 11 or the second part 12 during the test.

[0087] Figure 5 is a sectional view of a test device according to another illustrative embodiment of the present application. Figures 1 to 3 is an external view of the illustrative embodiment shown in Figure 5 .

[0088] According to an embodiment of the present application, as shown in ​ and ​ , the first part 11 and the second part 12 are stacked, and the first part 11 is located below the second part 12.

[0089] In an illustrative embodiment, as shown in ​ and ​ , unlike the embodiment shown in ​ , the first part 11 and the second part 12 can be stacked vertically, which is beneficial for saving the space occupied by the test device. Further, in the stacked embodiment, since the density of the steam generated by the steam generating mechanism 4 is smaller than that of air, the first part 11 can be arranged below the second part 12, which is beneficial for the diffusion of the steam into the second part 12. On this basis, in order to avoid the blocking of the sample 8, the load bearing mechanism and the second temperature and humidity sensor provided in the second part should adopt a wall-mounted structure, i.e. being suspended on the inner wall of the second part 12 by the support 9. The support 9 includes but is not limited to an L-shaped support plate, the lower end of which is connected to the inner wall of the second part 12, and the upper end of which forms a platform extending in the horizontal direction as a working surface of the weighing part 6.

[0090] In an exemplary embodiment, as shown in FIG. 1, the first part 11 and the second part 12 can be configured as a substantially cylindrical structure when the first part 11 and the second part 12 are overlaid. ​ Further, the extension 14 provided on the first part 11 and the second part 12 can also be configured as a flange structure to facilitate the assembly and sealing of the first part 11 and the second part 12.

[0091] It should be noted that the directional terms mentioned in the embodiments, such as "upper", "lower", "front", "back", "left", "right", etc., are only the directions of the drawings and are not intended to limit the protection scope of the present application. Throughout the drawings, the same elements are represented by the same or similar reference numerals. When the conventional structures or configurations may cause confusion to the understanding of the present application, they will be omitted.

[0092] The embodiments of the present application are described above. However, these embodiments are only for illustrative purposes, and are not intended to limit the scope of the present application. Although each embodiment is described above, it does not mean that the measures in each embodiment cannot be used advantageously in combination. The scope of the present application is defined by the appended claims and their equivalents. Without departing from the scope of the present application, those skilled in the art can make various substitutions and modifications, which should fall within the scope of the present application.

Claims

1. A testing apparatus suitable for testing the vapor permeability of waterproof materials, characterized in that, include: The housing (1) includes a first part (11) and a second part (12). The first ends of the first part (11) and the second part (12) facing each other are provided with openings. The sample (8) to be tested is detachably disposed between the first part (11) and the second part (12). The sample (8) is in an assembled state and covers the openings. The sample (8) and the first part (11) surround each other to form a first chamber. The sample (8) and the second part (12) surround each other to form a second chamber. A steam generating mechanism (4) is disposed in the first chamber and configured to generate steam; A weighing mechanism, disposed in the second chamber, includes: The water-absorbing part (5) is configured to absorb at least a portion of the vapor passing through the sample (8); as well as The weighing unit (6) is configured to weigh the mass change of the water-absorbing unit (5).

2. The testing apparatus according to claim 1, characterized in that, The device includes a detection mechanism (3) configured to detect the temperature difference between the first chamber and the second chamber.

3. The testing apparatus according to claim 2, characterized in that, The detection mechanism (3) is also configured to detect the humidity difference between the first chamber and the second chamber.

4. The testing apparatus according to claim 3, characterized in that, The testing organization (3) includes: A first temperature and humidity sensor (31), the detection end of the first temperature and humidity sensor (31) is disposed in the first cavity; and The second temperature and humidity sensor (32) is located in the second chamber.

5. The testing apparatus according to claim 1, characterized in that, It also includes a connecting mechanism (2) disposed between the first part (11) and the second part (12), configured to connect the first part (11) and the second part (12) so that the sample (8) is clamped by the first part (11) and the second part (12) and held in the assembled state.

6. The testing apparatus according to claim 5, characterized in that, The first part (11) and the second part (12) further include an extension (14) which protrudes outward from the sidewall of the first part (11) and the second part (12); The opposing extensions (14) of the first part (11) and the second part (12) are connected by the connecting mechanism (2).

7. The testing apparatus according to claim 1, characterized in that, The first end of the first part (11) and the second part (12) is provided with a shoulder (13) extending toward the inside of the opening, and the sample (8) is held between the shoulder (13) formed by the first part (11) and the second part (12).

8. The testing apparatus according to claim 7, characterized in that, It also includes a seal (15) disposed between the sample (8) and the shoulder (13) to form a seal between the shoulder (13) and the sample (8).

9. The testing apparatus according to claim 1, characterized in that, The first part (11) and the second part (12) are arranged side by side.

10. The testing apparatus according to claim 1, characterized in that, The first part (11) and the second part (12) are stacked, with the first part (11) located below the second part (12).

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