A photovoltaic composite ultraviolet aging test box

Abstract

The present application relates to the technical field of ultraviolet aging test chambers, and discloses a photovoltaic composite ultraviolet aging test chamber, which is used to solve the problem that the existing ultraviolet aging test chamber is difficult to simulate the scene of cyclic irradiation of photovoltaic components by sunrise and sunset. The ultraviolet irradiation lamp is fixed on a fixing part, and light shielding plates are connected to the fixing parts at both ends, and the fixing parts are rotated by a driven gear, a stepper motor and a driving gear; when the ultraviolet aging test chamber simulates ultraviolet rays irradiating the photovoltaic components, the fixing part, the light shielding plate and the ultraviolet irradiation lamp are rotated by a stepper motor, so that the light shielding plate cyclically blocks the ultraviolet rays irradiated by the ultraviolet irradiation lamp to the photovoltaic components, simulating the scene of cyclic irradiation of photovoltaic components by sunrise and sunset in reality, and preventing the error in the experimental results of the ultraviolet aging test chamber on photovoltaic components due to the difference between constant irradiation and cyclic irradiation by sunrise and sunset in reality.

Description

Technical Field

[0001] The present application relates to the technical field of ultraviolet aging test chambers, and in particular to a photovoltaic composite ultraviolet aging test chamber. Background Art

[0002] Since photovoltaic modules are placed outdoors for a long time, before mass production, they need to be subjected to UV aging experiments in UV aging test chambers to study the durability of photovoltaic modules under UV radiation, so as to determine whether the quality of the produced photovoltaic modules meets the standards.

[0003] UV aging test chamber, also known as UV test chamber or UV aging test machine, is a device that simulates the climatic conditions such as UV irradiation, temperature, humidity and condensation in the natural environment. Its main function is to evaluate the weathering performance of various materials under UV irradiation, as well as the performance changes of materials during long-term use.

[0004] When existing UV aging test chambers simulate UV irradiation, they use UV lamps to continuously irradiate for a long time until the experiment is completed. However, in the actual environment, the sunlight irradiates the photovoltaic modules in a cyclic manner, that is, the photovoltaic modules are irradiated when the sun comes out, and the photovoltaic modules are no longer irradiated when the sun sets. When the UV aging test chamber simulates UV irradiation, it is difficult to simulate the situation of cyclic irradiation of photovoltaic modules, and thus it is difficult to accurately simulate the impact of UV cyclic irradiation of photovoltaic modules on the performance of photovoltaic modules in reality, which ultimately affects the experimental results of the UV aging test chamber on photovoltaic modules. Summary of the invention

[0005] The present application proposes a photovoltaic composite UV aging test chamber, which has the advantage of being able to simulate the cyclic irradiation scene of the sunrise and sunset on the photovoltaic components, so as to solve the problem that the existing UV aging test chambers are difficult to simulate the cyclic irradiation scene of the sunrise and sunset on the photovoltaic components.

[0006] To achieve the above-mentioned purpose, the present application adopts the following technical scheme: a photovoltaic composite ultraviolet aging test box, comprising a box body, an experimental space and a closed door, wherein the experimental space is provided with: two connecting parts, fixedly connected to the two sides of the top of the experimental space; two fixing parts, each fixing part is movably sleeved in a connecting part; an ultraviolet irradiation lamp, with both ends respectively fixedly connected to the side walls of the fixing parts; a light baffle, with both ends respectively fixedly connected to the outer rings of the two fixing parts; a driven gear, fixedly sleeved on the outer ring of one of the fixing parts; a stepping motor, fixedly installed at the top of the experimental space; a driving gear, fixedly sleeved on the output shaft of the stepping motor, and the driving gear is meshed with the driven gear; and fixing devices are provided on the side walls on both sides of the experimental space.

[0007] Furthermore, the fixing device includes: two installation shafts, one ends of which are movably embedded in the side walls on both sides of the experimental space; a fixing plate, fixedly connected to the other end of the installation shaft, and the fixing plate is L-shaped; an extrusion bag, fixedly installed on the fixing plate, and the extrusion bag is filled with gas; a fixing rod is fixedly connected to the side of the driven gear close to the side wall of the experimental space, one end of the fixing rod is hinged to one end of the connecting rod, and the other end of the connecting rod is hinged to the fixing plate.

[0008] Furthermore, the difference between the length of the connecting rod and the fixing rod is smaller than the distance from the fixing member to the mounting axis.

[0009] Furthermore, a spiral groove is provided on the outer ring of the fixing member close to the side wall of the experimental space, and the spiral grooves are connected end to end;

[0010] An air storage device is fixedly installed on the side walls on both sides of the experimental space, and the air storage device includes: an air cylinder, fixedly installed on the side wall of the experimental space, and an air inlet hole is opened on the side wall of the air cylinder near the fixing part; a slider, slidably installed in the air cylinder; a power rod, fixedly connected to the center of the slider on one side close to the fixing part, and the power rod passes through and extends out of the side wall of the air cylinder; a sliding rod, one end of which is fixedly connected to the power rod extending out of the air cylinder, and the other end is slidably installed in the spiral groove of the fixing part; a one-way valve, fixedly installed on the side wall of the air cylinder; the one-way valve is connected to one end of a connecting pipe, and the connecting pipe is embedded in the box body, and the other end of the connecting pipe passes through the mounting shaft and the fixing plate and is connected to the extrusion bag.

[0011] Furthermore, a plurality of pressure relief valves are equidistantly arranged at the top ends of the opposite surfaces of the squeezing bags on both sides, and the pressure relief valves are communicated with the interior of the squeezing bags.

[0012] Furthermore, the height of the squeezing bag is greater than the height of the clamped part, and the position of the pressure relief valve is higher than the position of the top end of the clamped part.

[0013] Furthermore, the length of the fixing rod is shorter than the length of the sliding rod.

[0014] Furthermore, the maximum distance between the spiral groove and the end surface of the fixing member is less than the length of the air storage cylinder.

[0015] This application has the following beneficial effects:

[0016] 1. The present application provides a photovoltaic composite UV aging test box, which is achieved by fixing an UV lamp on a fixing part, and light shielding plates are connected to the fixing parts at both ends, and the fixing parts are rotated by a driven gear, a stepper motor and a driving gear; when the UV aging test box simulates UV irradiation on a photovoltaic component, the fixing part, the light shielding plate and the UV lamp are rotated by a stepper motor, so that the light shielding plate cyclically blocks the UV light from the UV lamp irradiating the photovoltaic component, simulating the scene of cyclic irradiation of the photovoltaic component by the sunrise and sunset in reality, so as to prevent the error in the experimental results of the UV aging test box on the photovoltaic component due to the difference between the constant irradiation and the cyclic irradiation by the sunrise and sunset in reality.

[0017] 2. The present application provides a photovoltaic composite UV aging test chamber, in which a fixing rod is fixedly connected to a fixing part, and both ends of the connecting rod are hinged to the fixing rod and the fixing plate respectively; the fixing part is driven to rotate by a stepper motor, so that the fixing rod on the fixing part drives the connecting rod to move, thereby driving the fixing device to reciprocate around the installation axis, so that the photovoltaic components on the fixing device rotate synchronously, simulating the oblique radiation of sunlight on the photovoltaic components, thereby increasing the degree of simulation of the real environment by the UV aging test chamber, and making the experimental results closer to reality.

[0018] 3. The present application provides a photovoltaic composite UV aging test box, in which a gas storage device is fixedly installed on a box body, the gas storage device comprising a gas cylinder, a slider, a power rod and a slide rod, a spiral groove is opened on the fixing part to drive the slide rod to drive the power rod and the slider to move, an extrusion bag is provided on the fixing plate, and the extrusion bag is connected to the gas storage device through a connecting tube, and the gas storage device is driven by the rotation of the fixing part to inflate the extrusion bag. In the experiment, the photovoltaic components are prevented from aging or deformation due to ultraviolet irradiation, which causes the extrusion bag to loosen the clamping of the photovoltaic components, thereby causing the photovoltaic components to fall.

[0019] 4. The present application provides a photovoltaic composite UV aging test chamber, in which a number of pressure relief valves are equidistantly arranged at the top ends of the opposite surfaces of two extrusion bags; when the gas in the extrusion bags reaches a certain pressure, it is released through the pressure relief valve (the pressure of the extrusion bags after releasing the gas is sufficient to clamp the photovoltaic module), thereby cleaning the upper surface of the photovoltaic module and preventing water droplets from staying on the upper surface of the photovoltaic module for a long time during the simulation process, which may cause errors in the experimental results. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which constitute a part of the specification, illustrate embodiments disclosed in the present application and, together with the description, serve to explain the principles disclosed in the present application.

[0021] The present disclosure may be more clearly understood from the following detailed description with reference to the accompanying drawings, in which:

[0022] Figure 1It is a schematic diagram of the three-dimensional structure of the present invention;

[0023] Figure 2 It is a longitudinal cross-sectional view of the present invention from the middle position of the box body;

[0024] Figure 3 It is a longitudinal cross-sectional view of the ultraviolet irradiation lamp of the present invention from the axis center;

[0025] Figure 4 It is a schematic diagram of the structure of the ultraviolet irradiation lamp, the fixing device and the gas storage device of the present invention;

[0026] Figure 5 It is a left side view of the ultraviolet irradiation lamp, the fixing device and the gas storage device of the present invention;

[0027] Figure 6 A cross-sectional view of the ultraviolet irradiation lamp, the fixing device and the gas storage device of the present invention;

[0028] Figure 7 For the present invention Figure 6 A magnified view of the local structure at point A.

[0029] In the figure: 1. box; 2. hinge; 3. experimental space; 4. closed door; 5. ultraviolet lamp; 6. fixing part; 601. light shield; 602. spiral groove; 7. connecting part; 8. driven gear; 9. stepping motor; 10. driving gear; 11. fixing device; 1101. mounting shaft; 1102. fixing plate; 1103. extrusion bag; 1104. pressure relief valve; 12. fixing rod; 13. connecting rod; 14. air storage device; 1401. air cylinder; 1402. sliding block; 1403. power rod; 1404. sliding rod; 1405. one-way valve; 15. connecting pipe. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0031] Embodiment 1

[0032] See also Figure 1 and Figure 2 A photovoltaic composite ultraviolet aging test box includes a box body 1, an experimental space 3 and a closed door 4. A hollow experimental space 3 is opened on the side of the upper end of the box body 1. A plurality of hinges 2 are fixedly installed on both sides of the opening of the experimental space 3. The closed door 4 is fixedly connected to the hinge 2 on the same side, and the closed door 4 is used to close the experimental space 3.

[0033] See also Figure 2-Figure 4 , connecting parts 7 are fixedly connected to both sides of the top of the experimental space 3, and a fixing part 6 is movably sleeved in each connecting part 7. An ultraviolet lamp 5 is arranged between the two fixing parts 6, and both ends of the ultraviolet lamp 5 are respectively fixedly connected to the side walls of the fixing parts 6, and the axis of the fixing part 6 is in the same straight line as the axis of the ultraviolet lamp 5. The outer rings of the two fixing parts 6 are fixedly installed with light blocking plates 601, and the two ends of the light blocking plates 601 are respectively fixedly connected to the outer rings of the fixing parts 6, and the width of the light blocking plates 601 can be adjusted proportionally according to the ultraviolet irradiation time and the non-irradiation time in the simulation; a driven gear 8 is fixedly sleeved on the outer ring of one of the fixing parts 6, and a stepping motor 9 is fixedly installed on the top of the experimental space 3, and a driving gear 10 is fixedly sleeved on the output shaft of the stepping motor 9, and the driving gear 10 is meshed with the driven gear 8; the side walls on both sides of the experimental space 3 are provided with fixing devices 11 for clamping photovoltaic modules.

[0034] The stepper motor 9 is a motor that converts electrical pulse signals into corresponding angular displacement or linear displacement. Each time a pulse signal is input, the rotor rotates an angle or moves forward one step. The angular displacement or linear displacement output is proportional to the number of input pulses, and the speed is proportional to the pulse frequency.

[0035] The working principle of the first embodiment of the present invention is as follows:

[0036] See also Figure 1-Figure 4 When the photovoltaic module is tested in the UV aging test chamber, the photovoltaic module is clamped by the fixing devices 11 on both sides so that the upper end surface of the photovoltaic module faces the UV irradiation lamp 5;

[0037] At this time, the ultraviolet irradiation lamp 5 and the stepper motor 9 are started, and the ultraviolet irradiation lamp 5 emits ultraviolet rays to irradiate the upper end surface of the photovoltaic module. At the same time, the stepper motor 9 drives the driving gear 10 to rotate at a set speed, so that the driving gear 10 drives the driven gear 8 and the fixed part 6 to rotate. During the rotation of the fixed part 6, the light blocking plate 601 on the fixed part 6 rotates accordingly. During the process of the light blocking plate 601 rotating one circle, the light blocking plate 601 will be at the lower end of the ultraviolet irradiation lamp 5 for a period of time, and the light blocking plate 601 blocks the ultraviolet rays emitted from the lower end of the ultraviolet irradiation lamp 5 to prevent the ultraviolet irradiation lamp from The ultraviolet rays emitted by the ultraviolet irradiation lamp 5 irradiate the upper end surface of the photovoltaic component. After a period of time, the light blocking plate 601 no longer blocks the ultraviolet rays emitted by the lower end of the ultraviolet irradiation lamp 5. At this time, the ultraviolet rays emitted by the ultraviolet irradiation lamp 5 irradiate the upper end surface of the photovoltaic component again, so that the ultraviolet rays emitted by the ultraviolet irradiation lamp 5 irradiate the upper end surface of the photovoltaic component in a cyclic manner, simulating the scene of cyclic irradiation of the photovoltaic component by the rising and setting sun in reality, preventing the error in the experimental results of the UV aging test chamber on the photovoltaic component due to the difference between the ultraviolet rays emitted by the ultraviolet irradiation lamp 5 and the cyclic irradiation by the rising and setting sun in reality.

[0038] Embodiment 2

[0039] In the actual use of photovoltaic modules, since the sun rises in the east and sets in the west, in the morning and afternoon, the sun's rays will produce oblique radiation on the photovoltaic modules. However, when the ultraviolet irradiation lamp 5 of the ultraviolet aging test box irradiates the photovoltaic modules, the ultraviolet rays generated by the ultraviolet irradiation lamp 5 directly irradiate the photovoltaic modules, and the oblique irradiation of the ultraviolet rays on the photovoltaic modules is not simulated. Therefore, there is a certain error in the accuracy of the experimental results. Embodiment 2 is a further improvement on Embodiment 1.

[0040] The difference from the first embodiment is that, please refer to Figure 2-Figure 4 The fixing device 11 includes two installation shafts 1101, a fixing plate 1102 and an extrusion bag 1103. One ends of the two installation shafts 1101 are movably embedded in the side walls on both sides of the experimental space 3 respectively, and the other ends of the installation shafts 1101 are fixedly connected with the fixing plates 1102. The fixing plates 1102 are L-shaped, and the fixing plates 1102 include a horizontal plate and a vertical plate. The extrusion bag 1103 is fixedly installed on the horizontal plate of the fixing plate 1102, and the extrusion bag 1103 is close to the vertical plate of the fixing plate 1102, and the extrusion bag 1103 is filled with gas; the side of the driven gear 8 close to the side wall of the experimental space 3 is fixedly connected with a fixing rod 12, one end of the fixing rod 12 is hinged to one end of a connecting rod 13, and the other end of the connecting rod 13 is hinged to the vertical plate of the fixing plate 1102, and the connecting rod 13 can push the fixing plate 1102 to drive the installation shaft 1101 to rotate around the axis of the installation shaft 1101.

[0041] The difference in length between the connecting rod 13 and the fixing rod 12 is less than the distance from the fixing member 6 to the mounting shaft 1101. When the fixing member 6 drives the fixing rod 12 to rotate to the highest point of the fixing member 6, the fixing rod 12 can pull the connecting rod 13 to drive the fixing plate 1102 to rotate.

[0042] The working principle of the second embodiment of the present invention is as follows:

[0043] See also Figure 1-Figure 4 When the photovoltaic module is tested in the UV aging test chamber, the stepper motor 9 drives the driving gear 10 to rotate at a set speed, so that the driving gear 10 drives the driven gear 8 and the fixing member 6 to rotate. During the rotation of the fixing member 6, the fixing rod 12 on the fixing member 6 rotates accordingly. Since one end of the connecting rod 13 is hinged to the fixing rod 12, and the other end of the connecting rod 13 is hinged to the fixing plate 1102, during the process of the fixing rod 12 rotating from the bottom end of the fixing member 6 to the top end of the fixing member 6, the fixing rod 12 will pull the connecting rod 13 to move upward, so that the connecting rod 13 pulls one side of the fixing plate 1102 to move upward, and the fixing plate 1102 that moves upward on one side will rotate around the axis of the installation shaft 1101, so that the whole The fixing device 11 is tilted, at this time, the photovoltaic module fixed on the fixing device 11 will be in a tilted state, and the ultraviolet rays irradiated by the ultraviolet irradiation lamp 5 will be tilted to the upper end face of the photovoltaic module; in the process of the fixing rod 12 rotating from the top of the fixing member 6 to the bottom of the fixing member 6, the fixing rod 12 will push the connecting rod 13 downward, so that the connecting rod 13 pushes one side of the fixing plate 1102 downward, and the fixing plate 1102 that moves downward on one side will rotate around the axis of the installation shaft 1101, so that the entire fixing device 11 is tilted toward the other side. At this time, the photovoltaic module fixed on the fixing device 11 will be tilted toward the other side, and the ultraviolet rays irradiated by the ultraviolet irradiation lamp 5 will be tilted from the other side to the upper end face of the photovoltaic module. The fixing device 11 drives the rotation of the photovoltaic module, causing the ultraviolet rays emitted by the ultraviolet irradiation lamp 5 to be tilted to the upper end face of the photovoltaic module, simulating the oblique radiation of sunlight on the photovoltaic module when the sun rises in the east and sets in the west, thereby increasing the degree of simulation of the real environment by the ultraviolet aging test chamber, making the experimental results closer to reality.

[0044] Embodiment 3

[0045] In the second embodiment, when the photovoltaic module is tested in the UV aging test box, the photovoltaic module will age or deform due to UV irradiation, causing the clamping of the squeezing capsule 1103 on the photovoltaic module to loosen, thereby causing the photovoltaic module to fall. The third embodiment is a further improvement on the second embodiment.

[0046] The difference from the second embodiment is that please refer to Figure 2-Figure 7A spiral groove 602 is provided on the outer circle of the fixing member 6 near the side wall of the experimental space 3, the spiral groove 602 is connected end to end, and the center of the spiral groove 602 is not on the same vertical plane, and the side walls on both sides of the experimental space 3 are respectively fixedly installed with gas storage devices 14, the gas storage device 14 includes a gas storage cylinder 1401, a slider 1402, a power rod 1403, a slide bar 1404 and a one-way valve 1405, the gas storage cylinder 1401 is fixedly installed on the side wall of the experimental space 3, and the position of the gas storage cylinder 1401 is higher than the center line of the fixing member 6, an air inlet hole is provided on the side wall of the gas storage cylinder 1401 and near the fixing member 6, and a slider is slidably installed in the gas storage cylinder 1401 1402, a power rod 1403 is fixedly connected to the center of the slider 1402 near the fixed part 6, and the power rod 1403 penetrates and extends out of the side wall of the air cylinder 1401, and one end of the power rod 1403 extending out of the air cylinder 1401 is fixedly connected to a slide rod 1404, and the bottom end of the slide rod 1404 is slidably installed in the spiral groove 602 of the fixed part 6, and a one-way valve 1405 is fixedly installed on the side wall of the air cylinder 1401; the one-way valve 1405 is connected to one end of the connecting pipe 15, and the connecting pipe 15 is embedded in the box body 1, and the other end of the connecting pipe 15 penetrates the installation shaft 1101 and the fixed plate 1102 and is connected to the extrusion bag 1103.

[0047] See also Figure 4 and Figure 6 A plurality of pressure relief valves 1104 are equidistantly arranged at the top ends of the opposite surfaces of the squeezing bags 1103 on both sides, and the pressure relief valves 1104 are connected to the interior of the squeezing bags 1103 .

[0048] The height of the squeezing bag 1103 is greater than the height of the clamped part, and the position of the pressure relief valve 1104 is higher than the top of the clamped part, so as to prevent the side wall of the photovoltaic module from blocking the pressure relief valve 1104 when the squeezing bag 1103 clamps the photovoltaic module, so that the gas in the pressure relief valve 1104 cannot be released.

[0049] The length of the fixed rod 12 is less than the length of the sliding rod 1404. When the fixing member 6 drives the fixed rod 12 to rotate, the fixed rod 12 is prevented from being blocked by the gas storage device 14, resulting in the phenomenon that the fixed rod 12 and the fixing member 6 cannot rotate.

[0050] The farthest distance between the spiral groove 602 and the end face of the fixing member 6 is less than the length of the gas cylinder 1401. When the slide bar 1404 slides in the spiral groove 602, the slide bar 1404 drives the power rod 1403 and the slider 1402 to move. Since the slider 1402 moves in the gas cylinder 1401, if the farthest distance between the spiral groove 602 and the end face of the fixing member 6 is greater than the length of the gas cylinder 1401, during operation, the slider 1402 will be limited by the gas cylinder 1401, resulting in the slide bar 1404 being unable to slide to the farthest distance between the spiral groove 602 and the end face of the fixing member 6.

[0051] The working principle of the third embodiment of the present invention is as follows:

[0052] See also Figure 1-Figure 7 When the photovoltaic module is tested in the UV aging test chamber, the squeezing bag 1103 of the fixing device 11 is inflated so that the photovoltaic module is clamped by the squeezing bags 1103 on both sides; during the experiment, the stepping motor 9 drives the driving gear 10 to rotate at a set speed, so that the driving gear 10 drives the driven gear 8 and the fixing member 6 to rotate. During the rotation of the fixing member 6, the spiral groove 602 on the fixing member 6 rotates accordingly. Since the spiral groove 602 is not on the same vertical plane, the rotating spiral groove 602 causes the slide bar 1404 to reciprocate in the axial direction of the fixing member 6, and the slide bar 1404 drives the power rod 1403 and the slider 140 2 also reciprocates in the axial direction of the fixing member 6. When the slider 1402 moves toward the one-way valve 1405, the gas in the gas cylinder 1401 is squeezed by the slider 1402, and the gas in the gas cylinder 1401 enters the squeezing bag 1103 through the one-way valve 1405 and the connecting pipe 15, so as to inflate the squeezing bag 1103, so that the squeezing bag 1103 clamps the photovoltaic module, and prevents the photovoltaic module from aging or deformation due to ultraviolet radiation, resulting in the squeezing bag 1103 loosening the clamping of the photovoltaic module, thereby causing the photovoltaic module to fall. The squeezing bag 1103 that replenishes gas clamps the photovoltaic module more firmly, and prevents the photovoltaic module from falling;

[0053] During the experiment on the photovoltaic module, the UV aging test chamber will also simulate rain falling on the upper end surface of the photovoltaic module, and there will be water droplets on the upper end surface of the photovoltaic module. At this time, when the gas in the extrusion bag 1103 reaches the pressure limit of the pressure relief valve 1104, the gas in the extrusion bag 1103 will be discharged from the pressure relief valve 1104, so that the discharged gas is blown to the upper end surface of the photovoltaic module, and the water droplets on the upper end surface of the photovoltaic module are blown off (the pressure of the extrusion bag 1103 after releasing the gas is sufficient to clamp the photovoltaic module), preventing the water droplets in the simulation process from staying on the upper surface of the photovoltaic module for a long time, causing errors in the experimental results.

Claims

1. A photovoltaic composite ultraviolet aging test box, comprising a box body (1), an experimental space (3) and a closed door (4), characterized in that: The experimental space (3) is provided with: Two connecting pieces (7) are fixedly connected to two sides of the top of the experimental space (3); Two fixing members (6), each fixing member (6) being movably sleeved in a connecting member (7); An ultraviolet irradiation lamp (5) has two ends fixedly connected to the side walls of a fixing member (6); A light blocking plate (601), both ends of which are respectively fixedly connected to the outer rings of two fixing members (6); A driven gear (8) fixedly sleeved on an outer ring of one of the fixing members (6); A stepper motor (9) is fixedly mounted on the top of the experimental space (3); A driving gear (10) is fixedly sleeved on the output shaft of the stepping motor (9), and the driving gear (10) is meshed with the driven gear (8); The side walls on both sides of the experimental space (3) are provided with fixing devices (11); The fixing device (11) comprises: Two installation shafts (1101), one end of the two installation shafts (1101) being movably embedded in the side walls on both sides of the experimental space (3); A fixing plate (1102) is fixedly connected to the other end of the mounting shaft (1101), and the fixing plate (1102) is L-shaped; An extrusion bag (1103) is fixedly mounted on the fixed plate (1102), and the extrusion bag (1103) is filled with gas; A fixing rod (12) is fixedly connected to the side surface of the driven gear (8) close to the side wall of the experimental space (3); one end of the fixing rod (12) is hinged to one end of a connecting rod (13); and the other end of the connecting rod (13) is hinged to a fixing plate (1102); A spiral groove (602) is provided on the outer ring of the fixing member (6) close to the side wall of the experimental space (3), and the spiral groove (602) is connected end to end; Gas storage devices (14) are fixedly mounted on the side walls of both sides of the experimental space (3), and the gas storage devices (14) include: An air storage cylinder (1401) is fixedly mounted on a side wall of the experimental space (3), and an air inlet hole is provided on the side wall of the air storage cylinder (1401) near the fixing member (6); A slider (1402) is slidably mounted in the air storage cylinder (1401); A power rod (1403) is fixedly connected to the center of the slider (1402) near the fixing member (6), and the power rod (1403) penetrates and extends out of the side wall of the gas storage cylinder (1401); A sliding rod (1404), one end of which is fixedly connected to a power rod (1403) extending out of the gas storage cylinder (1401), and the other end of which is slidably mounted in a spiral groove (602) of a fixing member (6); A one-way valve (1405) is fixedly mounted on the side wall of the gas storage cylinder (1401); The one-way valve (1405) is in communication with one end of a connecting pipe (15), the connecting pipe (15) is embedded in the box body (1), and the other end of the connecting pipe (15) passes through the mounting shaft (1101) and the fixing plate (1102) and is in communication with the extrusion bag (1103); A plurality of pressure relief valves (1104) are equidistantly arranged at the top ends of the opposite surfaces of the squeezing bags (1103) on both sides, and the pressure relief valves (1104) are in communication with the interior of the squeezing bags (1103).

2. A photovoltaic composite UV aging test box according to claim 1, characterized in that: The difference between the length of the connecting rod (13) and the fixing rod (12) is smaller than the distance from the fixing member (6) to the mounting shaft (1101).

3. The photovoltaic composite UV aging test box according to claim 1, characterized in that: The height of the squeezing bag (1103) is greater than the height of the clamped part, and the position of the pressure relief valve (1104) is higher than the position of the top end of the clamped part.

4. The photovoltaic composite UV aging test box according to claim 1, characterized in that: The length of the fixed rod (12) is smaller than the length of the sliding rod (1404).

5. The photovoltaic composite UV aging test box according to claim 1, characterized in that: The maximum distance between the spiral groove (602) and the end surface of the fixing member (6) is less than the length of the gas storage cylinder (1401).

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