Weather resistance detection device for window film material

Abstract

A window film material weather resistance detection device comprises a detection box, a sample holder, a water storage disc and a xenon lamp. A plurality of partition plates are arranged in the detection box, first detection chambers and second detection chambers which are alternately distributed are divided by the partition plates in the circumferential direction, each first detection chamber and each second detection chamber are each internally provided with a water storage disc, a sample holder and a xenon lamp, and the first detection chambers and the second detection chambers alternately carry out irradiation testing and condensation testing on samples on the sample holders. The interior of the detection box is divided into a group of first detection chambers and a group of second detection chambers, irradiation test and condensation test are circularly performed in the first detection chambers and the second detection chambers, and parameters such as temperature and humidity can be changed in the same group of detection chambers, so that test data of a sample under the condition that one parameter is changed can be obtained at the same time, and the detection accuracy is improved. The speed of the weather resistance test of the film material can be multiplied, and the test efficiency is greatly improved.

Description

Technical Field

[0001] The invention belongs to the technical field of film material detection, and in particular relates to a device for detecting the weather resistance of window film materials. Background Art

[0002] Composite new material plastic window film adopts new functional materials with multi-layer composite structure. Its core feature is to achieve comprehensive properties such as heat insulation, explosion protection, UV protection and decoration through material combination. The laboratory accelerated aging test in its weather resistance testing aims to simulate the long-term natural aging process in a short period of time by strengthening environmental factors. By strengthening key factors such as light (such as xenon arc lamps to simulate solar radiation), temperature (high temperature cycle), humidity (high humidity environment), etc., the energy of ultraviolet rays can break the chemical bonds of the material, and high temperature will accelerate the thermal motion of molecular chains. The combined effect of the two causes rapid aging of the material, simulating the aging process of plastic window film outdoors for several years or even decades in a short period of time, thereby greatly shortening the research and development cycle.

[0003] In weather resistance testing, irradiation testing and condensation testing are used to simulate daytime sunlight and nighttime condensation. However, in the test chamber, the irradiation test and condensation test of the same sample are performed alternately. When multiple samples need to be tested for aging speed under different temperatures and humidity, they need to be tested sequentially, resulting in a longer entire test time and relatively low test efficiency. Therefore, an efficient detection device is urgently needed. Summary of the Invention

[0004] In view of the above situation, in order to overcome the defects of the prior art, the purpose of the present invention is to provide a device for detecting the weather resistance of window film materials, so as to at least partially solve the problems raised in the above background technology.

[0005] The technical solution adopted by the present invention is as follows: a device for detecting the weather resistance of window film materials is proposed, comprising: The detection box is constructed as a cylinder, and an axial support is fixed at the center; A water storage tray is arranged at the bottom of the detection box; A sample rack, disposed in the test box and used to fix the sample; a xenon lamp, disposed on the shaft-shaped support and capable of irradiating the sample on the sample holder; The interior of the test box is provided with a plurality of partitions, and the partitions are used to separate the first test chamber and the second test chamber into alternately distributed first test chambers along the circumferential direction. Each of the first test chamber and the second test chamber is provided with the water storage tray, the sample rack and the xenon lamp, and the first test chamber and the second test chamber perform irradiation test and condensation test on the samples on the sample rack alternately.

[0006] Further, the sample holder includes a sample frame, a support frame, and a connecting rod. One end of the connecting rod is connected to the shaft-shaped support, and the other end is connected to the sample frame through the support frame. The sample frame is inclined at an angle of 15° - 45° with respect to the horizontal plane, and the sample test surface on the sample holder faces the water storage tray.

[0007] Further, the sample frame includes a first clamping frame and a second clamping frame. Both the first clamping frame and the second clamping frame are configured as rectangular frames. The first clamping frame is fixed to the top of the support frame, and the second clamping frame is snap-fitted above the first clamping frame and can clamp the sample between the first clamping frame and the second clamping frame.

[0008] Further, the support frame is configured as a "C" shape. The upper end of the support frame is connected to both sides of the first clamping frame. The connecting rod is fixed at the middle position of the bottom of the support frame. A spray rack is fixedly arranged inside the support frame. An atomizing nozzle for spraying water onto the sample test surface is fixedly arranged at the top of the spray rack. A water supply pipe is arranged inside the shaft-shaped support. One end of the water supply pipe is connected to an external water supply device, and the other end is connected to the atomizing nozzle through the connecting rod, the support frame, and the spray rack.

[0009] Further, a first window is provided below the sample holder corresponding to the water storage tray. Distilled water is contained inside the water storage tray, and an electric heating element for heating the distilled water is arranged inside the water storage tray. Temperature sensors for detecting temperature are arranged inside both the first detection chamber and the second detection chamber. The electric heating element is configured to be electrically connected to the temperature sensor, and when the temperature sensor detects that the temperature inside the first detection chamber or the second detection chamber reaches the set value, the electric heating element maintains the temperature of the distilled water at the set temperature.

[0010] Further, at least one second window is provided on the water storage tray. An adjusting turntable for adjusting the opening area size of the second window is arranged inside the water storage tray. The adjusting turntable is movably installed inside the water storage tray, and the movement path of the adjusting turntable includes a first position and a second position. When the adjusting turntable is in the first position, the second window is closed. When the adjusting turntable is in the second position, the second window is opened. When the adjusting turntable moves from the first position to the second position, the opening area of the second window gradually increases.

[0011] Further, a plurality of the second windows are provided on the water storage tray corresponding to the periphery of the first window, and each of the second windows is configured as a sector. The adjusting turntable is configured as a sector plate, and the adjusting turntable can rotate around the centers of the plurality of second windows to adjust the opening area of the second window by rotating the adjusting turntable.

[0012] Furthermore, the tops of the first detection chamber and the second detection chamber are both provided with box covers, the connection between the box covers and the detection box is provided with a sealing ring, and the box covers are provided with a breathable cover corresponding to the top of the sample rack, and the breathable cover can be opened and closed on the box covers.

[0013] Furthermore, the cross-sections of the first detection chamber and the second detection chamber are both fan-shaped, and the cross-sections of the box cover and the water storage tray are correspondingly fan-shaped. There are more than two first detection chambers and second detection chambers separated by the partition in the detection box, and the first detection chamber and the second detection chamber are equal in size and symmetrically distributed.

[0014] Furthermore, the axial direction of the xenon lamp tube is perpendicular to the water storage tray, and the test surface of the sample on the sample rack faces one side of the xenon lamp and the water storage tray.

[0015] Beneficial effects: The present invention forms a group of first detection chambers and a group of second detection chambers in the detection box, and irradiation test and condensation test are cyclically performed in the first detection chamber and the second detection chamber. In addition, parameters such as temperature and humidity can also be changed in the detection chambers in the same group to obtain test data of the sample under the condition of changing one parameter at the same time, which can multiply the speed of the weather resistance test of the membrane material and greatly improve the test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the three-dimensional structure of a device for detecting the weather resistance of window film materials proposed in an embodiment of the present invention; Figure 2 A schematic diagram of the internal structure of a device for detecting the weather resistance of window film materials proposed in an embodiment of the present invention; Figure 3 A schematic diagram of the top view of the interior of a device for detecting the weather resistance of window film materials according to an embodiment of the present invention; Figure 4 A schematic structural diagram of a water storage tray proposed in an embodiment of the present invention; Figure 5 This is a schematic structural diagram of a sample rack proposed in an embodiment of the present invention.

[0017] Among them, 001, first detection chamber; 002, second detection chamber; 10, detection box; 11, box cover; 111, breathable cover; 12, axial support; 13, partition; 20, water storage tray; 201, first window; 202, second window; 21, electric heating element; 22, adjustment dial; 30, sample rack; 31, sample frame; 311, first clamping frame; 312, second clamping frame; 32, support frame; 33, connecting rod; 40, xenon lamp; 50, spray rack; 51, atomizing nozzle; 52, water supply pipe.

[0018] The accompanying drawings are used to provide further understanding of the embodiments and constitute a part of the specification. They are used for explanation together with the embodiments and do not constitute a limitation of the embodiments. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection.

[0020] In the description of the embodiments, it should be understood that terms such as "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the embodiments.

[0021] In order to improve the efficiency of testing the weather resistance of window film materials, an embodiment of the present invention provides a device for testing the weather resistance of window film materials. The device mainly includes a testing box 10, a water storage tray 20, a sample rack 30 and a xenon lamp 40.

[0022] like Figure 1 and Figure 2 As shown, the test box 10 is constructed as a cylinder, and an axial support 12 is fixedly provided at the center position. The water storage tray 20 is arranged at the bottom of the test box 10 and is used to provide an air atmosphere with a set temperature and humidity into the test box 10. The sample rack 30 is arranged in the test box 10 and is used to fix the sample. The xenon lamp 40 is arranged on the axial support 12 and can irradiate the sample on the sample rack 30. The xenon lamp 40 can well simulate full-spectrum sunlight and thermal effects.

[0023] Among them, the interior of the detection box 10 is provided with multiple partitions 13, and the partitions 13 are used to separate the first detection chamber 001 and the second detection chamber 002 that are alternately distributed along the circumferential direction. Each of the first detection chamber 001 and the second detection chamber 002 is provided with a water storage tray 20, a sample rack 30 and a xenon lamp 40, and the first detection chamber 001 and the second detection chamber 002 alternately perform irradiation tests and condensation tests on the samples on the sample rack 30.

[0024] In some embodiments, the entire detection box 10 can be made of alloy material or plastic material (such as acrylic). The axial support 12 and the partition 13 therein are integrally formed with the detection box 10. The partition 13 and the axial support 12 make each first detection chamber 001 and second detection chamber 002 independent of each other. Moreover, the partition 13 is configured as a heat preservation board, and heat preservation materials can be filled inside it to reduce the mutual influence of the temperatures between the first detection chamber 001 and the second detection chamber 002.

[0025] By partitioning the detection box 10 into at least one first detection chamber 001 and a second detection chamber 002, irradiating tests and condensation tests are alternately performed on the specimens in the first detection chamber 001 and the second detection chamber 002 respectively. Thus, the number of specimens is increased成倍. The same tests can be performed on at least two specimens within the original time period for a single specimen, so as to achieve the effect of doubling the detection efficiency of the specimens.

[0026] As Figure 2 and Figure 5 shown, the specimen holder 30 includes a specimen frame 31, a support frame 32 and a connecting rod 33. One end of the connecting rod 33 is connected to the axial support 12, and the other end is connected to the specimen frame 31 through the support frame 32.

[0027] It should be known that the specimen includes a test surface and a non-test surface. The test surface needs to face the xenon lamp 40 and the water storage tray 20, so that the test surface directly contacts the irradiation of the xenon lamp � and the steam condensation of the water storage tray 20 facing the test surface, so as to simulate the effects of daytime sunlight and nighttime condensation.

[0028] In some embodiments, the entire specimen holder 30 is made of stainless steel or aluminum alloy material. A part of the connecting rod 33 is connected and fixed on the outer peripheral side wall of the axial support 12. The connecting rod 33 is parallel to the horizontal plane. The support frame 32 is configured as a "匚" shape, and the connecting rod

[0029] 33 is fixed at the middle position of the bottom of the support frame 32, forming an "L" - shaped support structure.

[0030] Furthermore, the axial direction of the lamp tube of the xenon lamp 40 is perpendicular to the water storage tray 20, and the test surface of the specimen on the specimen holder 30 faces the side of the xenon lamp 40 and the water storage tray 20.

[0031] Generally, the size of the sample is 100×100mm or 150×150mm, and a non-test area of ≥5mm needs to be reserved on the edge of the sample to avoid the clamping frame blocking the exposure uniformity. The clamping cooperation of the first clamping frame 311 and the second clamping frame 312 can adopt the cooperation method of the card slot and the card rail or the installation method of the magnetic pole, so that the first clamping frame 311 and the second clamping frame 312 can be engaged or attracted to each other to achieve the effect of fixing the sample.

[0032] After the sample is fixed, the test surface of the sample is directly exposed to the irradiation of the xenon lamp 40, simulating the direct irradiation of sunlight (especially ultraviolet light, visible light and infrared light) on the material surface, causing photo-oxidative degradation, discoloration, gloss loss, embrittlement, etc.

[0033] In nature, especially at night or in the early morning, when the surface temperature of a material drops below the dew point of the surrounding air, water vapor in the air condenses on its surface as dew. This continuous wetting / drying cycle is one of the key factors that cause the aging of many materials. Condensation testing typically simulates the effects of the humid environment formed by dew on materials in nature. The sample frame 31 is tilted at an angle of 15° to 45° from the horizontal plane, with the test surface of the sample on the sample rack 30 facing the water storage tray 20. This angle is conducive to the effective formation, flow, and renewal of condensed water.

[0034] The following details the condensation test. The water reservoir 20 is heated to a set temperature (typically between 40°C and 60°C). First, the back of the sample needs to be cooled. At this point, the xenon lamp 40 is turned off, and outside air is introduced above the sample for cooling. The temperature is typically controlled to be approximately ten degrees lower than that of the water reservoir 20 (for example, if the water reservoir 20 is at 50°C, the air temperature is around 35°C). This creates a temperature difference between the upper and lower sides of the sample. The sample's test surface (facing downward) is exposed to the warm, humid steam environment. Because the sample itself is a poor conductor of heat, its test surface temperature approaches the higher temperature of the water vapor below. The back of the sample (facing upward) is exposed to the relatively cooler air, causing the overall sample temperature to drop, particularly below the dew point of the humid air above it. At this point, water vapor condenses on the sample's test surface, forming a continuous, uniform film. The condensed water droplets, driven by gravity, flow down the inclined sample surface (thanks to the sample's mounting angle). New water vapor will continue to condense on the sample surface, replacing the lost water droplets. This process ensures that the sample surface is always covered with a layer of fresh, unsaturated condensed water, which is very similar to the constantly renewed dew in nature. This dynamic renewal is very important because it can more effectively wash away soluble degradation products (such as plasticizers, stabilizer decomposition products, oxidation products, etc.) from the sample surface (accelerating degradation) and continuously provide pure water for hydrolysis reactions.

[0035] During the irradiation test and condensation test of the sample, an additional spray test is required to simulate the effect of rain on the membrane. Therefore, a spray rack 50 is also required. Currently, the spray rack 50 is set above, opposite to the test surface of the sample. Before the spray test, the direction of the sample needs to be turned to the upper side, and after the spray test, it needs to be turned to the lower side. Therefore, the test speed will also be slowed down.

[0036] In order to avoid the change of the sample direction during the spray test, the upper end of the support frame 32 is further connected to the two sides of the first clamping frame 311, and a spray frame 50 is fixed on the inner side of the support frame 32. The top of the spray frame 50 is fixed with an atomizing nozzle 51 for spraying water onto the test surface of the sample. A water supply pipe 52 is provided inside the axial support 12. One end of the water supply pipe 52 is connected to the external water supply device, and the other end is connected to the atomizing nozzle 51 through the connecting rod 33, the support frame 32 and the spray frame 50.

[0037] When conducting a spray test, distilled water or deionized water can be provided to the water supply pipe 52 through an external water supply device. The water is transported through the water supply pipe 52 to the atomizing nozzle 51 below the first clamping frame 311, so that the atomizing nozzle 51 sprays water onto the test surface of the sample. This can simulate rainwater scouring, wash away soluble degradation products and pollutants on the surface of the sample, accelerate aging, and simulate thermal shock. When the sample is suddenly sprayed with cold water after being exposed to high temperature light, a drastic temperature change occurs, which may induce or accelerate failures such as stress cracking and coating cracking.

[0038] like Figure 2 and Figure 4 As shown, a first window 201 is provided below the water storage tray 20 corresponding to the sample rack 30. Distilled water is contained inside the water storage tray 20, and an electric heating element 21 for heating the distilled water is provided inside the water storage tray 20. Temperature sensors for detecting temperature are provided inside the first detection chamber 001 and the second detection chamber 002. The electric heating element 21 is configured to be electrically connected to the temperature sensor, and when the temperature sensor detects that the temperature inside the first detection chamber 001 or the second detection chamber 002 reaches the set value, the electric heating element 21 maintains the temperature of the distilled water at the set temperature.

[0039] During operation, the water in the water storage tray 20 is heated to a set temperature by the electric heating element 21 inside the water storage tray 20, and the warm water in the water storage tray 20 transmits water vapor to the first detection chamber 001 or the second detection chamber 002 through the first window 201, so that the air atmosphere in the first detection chamber 001 or the second detection chamber 002 reaches the set temperature and humidity.

[0040] Further, such as Figure 3 and Figure 4As shown, at least one second window 202 is provided on the water storage tray 20, and an adjusting dial 22 for adjusting the opening area of the second window 202 is provided inside the water storage tray 20. The adjusting dial 22 is movably installed inside the water storage tray 20, and the movable path of the adjusting dial 22 includes a first position and a second position. When the adjusting dial 22 is in the first position, the second window 202 is closed, and when the adjusting dial 22 is in the second position, the second window 202 is opened. When the adjusting dial 22 moves from the first position to the second position, the opening area of the second window 202 gradually increases.

[0041] In some embodiments, a plurality of second windows 202 are provided on the water storage tray 20 corresponding to the circumferential side of the first window 201, and each second window 202 is configured as a fan, the adjustment dial 22 is configured as a fan-shaped plate, and the adjustment dial 22 can rotate around the center of the plurality of second windows 202, and the opening area of the second window 202 is adjusted by rotating the adjustment dial 22.

[0042] During operation, the exposed area of the second window 202 can be controlled by rotating the position of the adjustment dial 22. By controlling the area of the second window 202, the speed at which water vapor is transported into the first detection chamber 001 or the second detection chamber 002 can be controlled, thereby adjusting the humidity in the first detection chamber 001 or the second detection chamber 002.

[0043] A box cover 11 is provided on the top of the first detection chamber 001 and the second detection chamber 002. A sealing ring is provided at the connection between the box cover 11 and the detection box 10. A breathable cover 111 is provided on the box cover 11 corresponding to the top of the sample rack 30. The breathable cover 111 can be opened and closed on the box cover 11. By arranging the breathable cover 111 above the sample rack 30 and the breathable cover 111 can be opened independently, cold air can be introduced to the back of the sample during the condensation test to form condensation on the test surface of the sample. Compared with opening the box cover 11, it is more convenient and it is easier to form a larger temperature difference between the front and back of the sample, thereby promoting the formation of condensation.

[0044] The cross-sections of the first detection chamber 001 and the second detection chamber 002 are both fan-shaped, and the cross-sections of the box cover 11 and the water storage tray 20 are correspondingly fan-shaped. The first detection chamber 001 and the second detection chamber 002 are separated into two or more by partitions 13 in the detection box 10. The first detection chamber 001 and the second detection chamber 002 are equal in size and symmetrically distributed.

[0045] In some embodiments, when the number of first detection chambers 001 and second detection chambers 002 is large enough, for example, the number of first detection chambers 001 and second detection chambers 002 is three, multiple groups of control groups can be set up to control the temperature and humidity in the first detection chamber 001 and the second detection chamber 002 at different values, and the first detection chamber 001 and the second detection chamber 002 are circulated to perform radiation tests and condensation tests. Multiple groups of samples can be tested at the same time to obtain more test data.

[0046] In combination with the above embodiments, a group of first detection chambers 001 and a group of second detection chambers 002 are formed by dividing the detection box 10, and the radiation test and the condensation test are cyclically performed in the first detection chamber 001 and the second detection chamber 002. In addition, in the detection chambers of the same group, parameters such as temperature and humidity can also be changed to obtain test data of the sample under the condition of changing one parameter at the same time. In this way, the speed of the weather resistance test of the membrane material can be multiplied, greatly improving the test efficiency.

[0047] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0048] The above description of the embodiment is non-limiting. The drawings show only one embodiment, and the actual structure is not limited thereto. In short, if a person skilled in the art is inspired by this and, without departing from the purpose of the invention, designs a similar structure and embodiment without inventiveness, they shall fall within the scope of protection.

Claims

1. A device for detecting the weather resistance of window film materials, characterized in that: Comprising: A detection box (10), constructed as a cylinder, and an axial support (12) is fixedly provided at the central position; A water storage tray (20), arranged at the bottom of the detection box (10); A specimen holder (30), arranged inside the detection box (10), including a fixing part for fixing the specimen; A xenon lamp (40), arranged on the axial support (12) and configured to irradiate the specimen on the specimen holder (30); Wherein, a plurality of partition plates (13) are provided inside the detection box (10), and the first detection chamber (001) and the second detection chamber (002) which are alternately distributed are circumferentially separated by the partition plates (13). A water storage tray (20), a specimen holder (30) and a xenon lamp (40) are provided in each of the first detection chamber (001) and the second detection chamber (002). It is set that the on-period of the xenon lamp (40) in the first detection chamber (001) is consistent with the off-period of the xenon lamp (40) in the second detection chamber (002), and the xenon lamps (40) in the first detection chamber (001) and the second detection chamber (002) are alternately turned on to alternately perform irradiation tests and condensation tests on the specimens on the specimen holder (30).

2. The window film material weather resistance detection device according to claim 1, characterized in that: The specimen holder (30) includes a specimen frame (31), a support frame (32) and a connecting rod (33). One end of the connecting rod (33) is connected to the axial support (12), and the other end is connected to the specimen frame (31) through the support frame (32). The specimen frame (31) is inclined at an angle of 15° to 45° with respect to the horizontal plane, and the specimen test surface on the specimen holder (30) faces the water storage tray (20).

3. The window film material weather resistance detection device according to claim 2, characterized in that: The specimen frame (31) includes a first clamping frame (311) and a second clamping frame (312). Both the first clamping frame (311) and the second clamping frame (312) are constructed as rectangular frames. The first clamping frame (311) is fixed to the top of the support frame (32), and the second clamping frame (312) is snap-fitted and installed above the first clamping frame (311) and can clamp the specimen between the first clamping frame (311) and the second clamping frame (312).

4. The window film material weather resistance detection device according to claim 3, characterized in that: The support frame (32) is constructed as a "C" shape. The upper end of the support frame (32) is connected to both sides of the first clamping frame (311). The connecting rod (33) is fixed to the middle position at the bottom of the support frame (32). A spraying frame (50) is fixedly provided inside the support frame (32). An atomizing nozzle (51) for spraying water onto the specimen test surface is fixedly provided at the top of the spraying frame (50). A water supply pipe (52) is provided inside the axial support (12). One end of the water supply pipe (52) is connected to an external water supply device, and the other end is connected to the atomizing nozzle (51) through the connecting rod (33), the support frame (32) and the spraying frame (50).

5. The window film material weather resistance detection device according to claim 1, characterized in that: The water storage tray (20) is provided with a first window (201) below the sample rack (30), and the water storage tray (20) is filled with distilled water. The water storage tray (20) is provided with an electric heating element (21) for heating the distilled water. The first detection chamber (001) and the second detection chamber (002) are both provided with temperature sensors for detecting temperature. The electric heating element (21) is configured to be electrically connected to the temperature sensor, and when the temperature sensor detects that the temperature in the first detection chamber (001) or the second detection chamber (002) reaches a set value, the electric heating element (21) maintains the temperature of the distilled water at the set temperature.

6. The device for detecting the weather resistance of window film materials according to claim 5, wherein: At least one second window (202) is provided on the water storage tray (20), and an adjusting dial (22) for adjusting the size of the opening area of the second window (202) is provided inside the water storage tray (20). The adjusting dial (22) is movably installed inside the water storage tray (20), and the movable path of the adjusting dial (22) includes a first position and a second position. When the adjusting dial (22) is in the first position, the second window (202) is closed, and when the adjusting dial (22) is in the second position, the second window (202) is opened. When the adjusting dial (22) moves from the first position to the second position, the opening area of the second window (202) gradually increases.

7. The device for detecting the weather resistance of window film materials according to claim 6, wherein: A plurality of second windows (202) are provided on the water storage tray (20) on the circumferential side corresponding to the first window (201), and each second window (202) is configured in a fan shape. The adjusting dial (22) is configured as a fan-shaped plate, and the adjusting dial (22) can rotate around the center of the plurality of second windows (202), and the opening area of the second window (202) can be adjusted by rotating the adjusting dial (22).

8. The device for detecting the weather resistance of window film materials according to claim 1, wherein: The tops of the first detection chamber (001) and the second detection chamber (002) are both provided with box covers (11), and a sealing ring is provided at the connection between the box cover (11) and the detection box (10). A ventilation cover (111) is provided on the box cover (11) corresponding to the upper part of the sample rack (30), and the ventilation cover (111) is openably and closably arranged on the box cover (11).

9. The device for detecting the weather resistance of window film materials according to claim 8, wherein: The cross-sections of the first detection chamber (001) and the second detection chamber (002) are both constructed in a fan shape, and the cross-sections of the box cover (11) and the water storage tray (20) are correspondingly constructed in a fan shape. The first detection chamber (001) and the second detection chamber (002) are respectively divided into two or more by the partition (13) in the detection box (10), and the first detection chamber (001) and the second detection chamber (002) are of equal size and symmetrically distributed.

10. The device for detecting the weather resistance of window film materials according to claim 1, wherein: The axial direction of the xenon lamp (40) is perpendicular to the water storage tray (20), and the test surface of the sample on the sample rack (30) faces one side of the xenon lamp (40) and the water storage tray (20).

Images