A device for testing heat insulating glass

Abstract

The application provides a projector heat insulation glass testing device, which integrates an adjustable light plate, a testing cavity, heat insulation glass and a temperature detection assembly, constructs a testing environment capable of synchronously applying light and heat radiation, realizes the collaborative loading of thermal and optical coupling stress, and greatly shortens the testing period and reduces the time and energy consumption cost.

Description

Technical Field

[0001] This application relates to the field of projectors, and more particularly to a heat-insulating glass testing device. Background Technology

[0002] Insulating glass for projectors is mainly used to isolate the heat generated by the optical path and ensure effective light transmission. Its key evaluation indicators include temperature resistance, light resistance, and failure risks such as yellowing, transmittance reduction and deformation caused by the coupling of the two.

[0003] However, existing testing methods for heat-insulating glass used in projectors generally adopt a separate testing approach for "temperature resistance index" and "light resistance index": usually, temperature resistance performance is verified independently in a high-temperature chamber and light intensity is tested in a separate device, making it difficult to perform synergistic loading and evaluation of the two stresses in the same device; due to the lack of comprehensive verification under thermal-light coupling conditions, the testing is insufficient, and defects such as yellowing of heat-insulating glass may still occur in the mass production stage, reflecting the problem that the existing verification path does not cover the actual risks.

[0004] Therefore, there is a need for a testing device for heat-insulating glass that can simultaneously perform temperature resistance and light resistance tests at the same workstation to reproduce actual working conditions. Utility Model Content

[0005] In view of this, it is necessary to provide a heat-insulating glass testing device that can simultaneously perform temperature resistance and light resistance tests at the same work station to reproduce actual working conditions, in order to solve the above problems.

[0006] An embodiment of this application provides a heat-insulating glass testing device, comprising:

[0007] The housing, together with the connecting cover, forms the test chamber;

[0008] A photothermal assembly is disposed on the side of the connecting cover away from the housing. The photothermal assembly includes a dimmable plate, and the working optical path of the dimmable plate is arranged towards the test cavity.

[0009] A heat-insulating glass is disposed inside the test cavity and on the working optical path of the dimmable plate, so that the working optical path of the dimmable plate passes through the test cavity via the heat-insulating glass to apply heat to the test cavity;

[0010] A temperature detection component is used to obtain the temperature of the heat-insulating glass and the test chamber.

[0011] In at least one embodiment of this application, the temperature detection component includes:

[0012] A first temperature sensor is connected to the heat-insulating glass;

[0013] A second temperature sensor is disposed in the test chamber on the side away from the photothermal component, and the second temperature sensor is connected to the dimmable plate.

[0014] In at least one embodiment of this application, the photothermal component further includes a power driver connected to the dimmable plate to drive the dimmable plate to adjust the light intensity.

[0015] In at least one embodiment of this application, the heat-insulating glass is disposed in the test cavity to divide the test cavity into a first cavity and a second cavity;

[0016] The first cavity is located on the side of the test cavity close to the photothermal component;

[0017] The second cavity is located on the side of the test cavity away from the photothermal component, and the second temperature sensor is located inside the second cavity.

[0018] In at least one embodiment of this application, the testing device further includes: at least two sets of clamping components, respectively disposed on the inner walls of opposite sides of the housing and arranged opposite to each other, and the heat-insulating glass is disposed between the two sets of clamping components;

[0019] Each set of clamping components includes an elastic element and a clamping plate. One end of the elastic element is disposed on the inner wall of the housing, and the other end is disposed on the clamping plate.

[0020] The clamping plate includes an integrally formed connecting part and a clamping groove. The connecting part is connected to the elastic element and is disposed towards the inner wall of the housing. The clamping groove is away from the inner wall of the housing, and the edge of the heat-insulating glass is disposed in the clamping groove.

[0021] In at least one embodiment of this application, the first temperature sensor includes:

[0022] A temperature sensor is attached to the surface of the heat-insulating glass facing or away from the photothermal component;

[0023] A temperature measuring component, connected to the temperature sensing probe, is used to collect the temperature of the heat-insulating glass.

[0024] In at least one embodiment of this application, the housing has an installation opening, which communicates with the second cavity;

[0025] The testing device further includes an airflow control component, which is disposed on the mounting port to block the mounting port.

[0026] In at least one embodiment of this application, the airflow control component includes:

[0027] The fan casing is fitted over the mounting port;

[0028] The first cooling fan is located inside the fan housing;

[0029] A regulator is connected to the first cooling fan to adjust the fan speed of the first cooling fan;

[0030] The power supply is electrically connected to the regulator.

[0031] In at least one embodiment of this application, the photothermal component further includes: a heat dissipation component, the heat dissipation component being connected to the dimmable plate;

[0032] The heat dissipation component includes:

[0033] A heat sink is attached to the side of the dimmable plate opposite to the connecting cover.

[0034] A heat dissipation pipe extends along the surface of the heat dissipation plate and penetrates the opposite sides of the heat dissipation plate;

[0035] The second cooling fan is positioned directly opposite the heat pipe to dissipate the heat from the heat pipe.

[0036] In at least one embodiment of this application, the connecting cover has a first light-transmitting port and a second light-transmitting port, the first light-transmitting port and the second light-transmitting port are arranged facing each other, and the dimmable plate covers the opening end of the first light-transmitting port away from the test cavity, and the housing is connected to the side of the second light-transmitting port away from the first light-transmitting port.

[0037] When viewed along the horizontal direction of the dimmable plate, the inner diameter of the first light-transmitting port is smaller than the inner diameter of the second light-transmitting port.

[0038] The aforementioned heat-insulating glass testing device integrates a dimmable plate into the connecting cover, allowing its working optical path to pass through the test chamber and the heat-insulating glass under test. This enables simultaneous application of light and heat load at the same workstation, achieving synergistic loading of thermo-optical coupled stress. Simultaneously, it significantly shortens the testing cycle and reduces time and energy costs. The device can realistically simulate the combined photothermal and optical environment of the heat-insulating glass during actual projector operation, effectively reproducing failure modes such as yellowing and transmittance attenuation, significantly improving testing accuracy and operational coverage. Furthermore, the temperature detection component can monitor the glass and chamber temperature in real time, providing data support for evaluating the performance degradation of the heat-insulating glass under coupled conditions. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the test device in the embodiments of this application;

[0040] Figure 2This is a front view schematic diagram of the connecting cover and the shell;

[0041] Figure 3 This is a schematic cross-sectional view of the connection between the cover and the shell;

[0042] Figure 4 This is an exploded cross-sectional view of the connecting cover and the shell;

[0043] Figure 5 for Figure 3 A schematic diagram of structure A in the middle.

[0044] Explanation of main component symbols

[0045] 100. Testing device; 10. Housing; 11. Mounting port; 20. Connecting cover; 21. First light-transmitting port; 22. Second light-transmitting port; 30. Testing chamber; 31. First chamber; 32. Second chamber; 40. Photothermal component; 41. Dimmable plate; 42. Power driver; 43. Heat dissipation component; 431. Heat sink; 432. Heat dissipation pipe; 433. Second cooling fan; 50. Heat-insulating glass; 60. Temperature detection component; 61. First temperature sensor; 611. Temperature sensor probe; 612. Temperature measuring component; 62. Second temperature sensor; 70. Clamping component; 71. Elastic element; 72. Clamping plate; 721. Connecting part; 722. Clamping groove; 80. Airflow control component; 81. Fan housing; 82. First cooling fan; 83. Regulator; 84. Power supply. Detailed Implementation

[0046] The embodiments of this application will now be described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0047] It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or may also have an intervening component. When a component is considered to be "placed" on another component, it can be directly placed on the other component or may also have an intervening component. The terms "top," "bottom," "upper," "lower," "left," "right," "front," "back," and similar expressions used in this article are for illustrative purposes only.

[0048] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0049] According to Figure 1-2, this application provides a heat-insulating glass 50 testing device 100, including: a housing 10, a connecting cover 20, a photothermal component 40, a heat-insulating glass 50, and a temperature detection component 60.

[0050] The housing 10 and the connecting cover 20 are joined to form a test cavity 30. A photothermal component 40 is disposed on the connecting cover 20, away from the housing 10. The photothermal component 40 includes a dimmable plate 41, the working optical path of which faces the test cavity 30. A heat-insulating glass 50 is disposed inside the test cavity 30 and along the working optical path of the dimmable plate 41, allowing the working optical path of the dimmable plate 41 to pass through the test cavity 30 via the heat-insulating glass 50, thereby applying heat to the test cavity 30. A temperature detection component 60 is used to acquire the temperature of the heat-insulating glass 50 and the test cavity 30.

[0051] Specifically, the housing 10 and the connecting cover 20 are mechanically joined, such as by bolts or snap-fit ​​structures, to form a closed, heat-insulated, and light-tight test environment. This test chamber 30 simulates the actual installation environment of the projector's optical module, preventing external airflow and stray light from interfering with the test results, while ensuring stable loading of the thermal and optical fields. The dimmable plate 41, as the core loading component, can simulate the strong light and radiant heat in the actual optical path of the projector. Positioning it outside the connecting cover 20 facilitates the management of the heat dissipation pipe 432 and avoids the direct impact of heat radiation on the structure of the test chamber 30. The heat-insulating glass 50 is installed perpendicular to the optical path to simultaneously apply light and heat loads to it. This arrangement reproduces its actual working state in the projector's optical engine, ensuring high light transmittance while blocking heat transfer to sensitive optical components.

[0052] It should be noted that the dimmable plate 41 is used to adjust the output power of the light plate, thereby controlling the light intensity and heat radiation intensity of the dimmable plate 41.

[0053] Furthermore, the tunable light plate 41 serves as both a light source and a heat source. The output intensity of the tunable light plate 41 is adjustable via a variable drive to form a working optical path that meets testing specifications and illuminates the heat-insulating glass 50. During operation, the radiant energy and self-heating generated by the tunable light plate 41 are coupled radially into the test chamber 30 through the opening of the connecting cover 20 along the optical path, applying heat to the air inside the chamber and the heat-insulating glass 50. Since the optical path and heat flow superimpose from the same emitting surface and along the same spatial direction onto the same tested area, the photoinduced load and thermal load maintain a high degree of consistency in space and time, enabling a more realistic reproduction of the accumulated stress from strong light and heat during the projector's service life.

[0054] Furthermore, the temperature detection component 60 acquires the temperatures of the heat-insulating glass 50 and the test chamber 30, and monitors and provides feedback on the temperature of the glass body and the thermal field distribution of its surrounding environment in real time.

[0055] In one specific embodiment, the temperature detection component 60 includes:

[0056] A first temperature sensor 61 is connected to the heat-insulating glass 50;

[0057] The second temperature sensor 62 is located inside the test cavity 30 and on the side away from the photothermal component 40, and the second temperature sensor 62 is connected to the dimmable plate 41.

[0058] Specifically, the first temperature sensor 61 is directly connected to the heat-insulating glass 50, thereby directly capturing the real-time temperature change of the heat-insulating glass 50 body. This avoids misjudgment caused by transmission delay or deviation between the cavity temperature and the glass body temperature, and provides the most direct data basis for judging whether the glass has reached the temperature resistance limit and whether there is a risk of local overheating deformation.

[0059] Furthermore, the second temperature sensor 62 avoids the direct light-illuminated area of ​​the dimmable plate 41 and can monitor the temperature inside the test cavity 30. Together with the first temperature sensor 61, it reflects whether the overall temperature distribution inside the test cavity 30 is uniform. At the same time, its connection design with the dimmable plate 41 allows it to send a signal to the dimmable plate 41 when the second temperature sensor 62 detects that the temperature inside the cavity is too high or the temperature distribution is uneven. This allows the dimmable plate 41 to adjust the light intensity and heat radiation, ensuring that the test cavity 30 always conforms to the actual scene and avoiding the impact of uncontrolled test environment on the validity of the results.

[0060] Furthermore, the second temperature sensor 62 is an NTC temperature sensor that monitors the temperature of the test chamber 30 and links it to achieve chamber temperature control and over-temperature protection. In this embodiment, the second temperature sensor 62 can automatically cut off power for protection in case of abnormal high temperature, based on the monitored temperature setting.

[0061] In one specific embodiment, the photothermal component 40 further includes a power driver 42, which is connected to the dimmable plate 41 to drive the dimmable plate 41 to adjust the light intensity.

[0062] Specifically, the power driver 42 and the dimmable plate 41 are connected by a wire. The power driver 42 provides a stable and precisely adjustable drive current and voltage to the dimmable plate 41. By controlling the power of the dimmable plate 41, the required light source power is matched according to the specifications.

[0063] Through the linkage between the second temperature sensor 62 and the power driver 42, when the second temperature sensor 62 detects that the temperature inside the test chamber 30 exceeds the set range or is unevenly distributed, the power driver 42 can adjust the output power of the power driver 42 to fine-tune the light intensity of the adjustable light plate 41 and maintain the stability of the thermo-optical coupling condition.

[0064] In one specific embodiment, the heat-insulating glass 50 is disposed inside the test chamber 30 to divide the test chamber 30 into a first chamber 31 and a second chamber 32;

[0065] The first cavity 31 is located on the side of the test cavity 30 near the photothermal component 40;

[0066] The second cavity 32 is located on the side of the test cavity 30 away from the photothermal component 40, and the second temperature sensor 62 is located inside the second cavity 32.

[0067] Specifically, the heat-insulating glass 50 under test is fixedly installed inside the test chamber 30, dividing it into two independent environmental areas: a first chamber 31 and a second chamber 32. The first chamber 31 is located closer to the photothermal component 40, directly bearing all the light radiation and thermal shock from the dimmable plate 41, simulating the high-temperature, high-pressure environment of the light source engine side in a projector. The second chamber 32 is located further away from the photothermal component 40, representing the environment of the optical engine or display chip side protected by the heat-insulating glass 50. A second temperature sensor is arranged inside the second chamber 32 to accurately monitor the heat transferred to that side after passing through the heat-insulating glass 50 and the ambient temperature of that side of the chamber.

[0068] In one specific embodiment, the testing device 100 further includes: at least two sets of clamping assemblies 70, which are respectively disposed on the inner walls of opposite sides of the housing 10 and arranged opposite to each other, and the heat-insulating glass 50 is disposed between the two sets of clamping assemblies 70;

[0069] Each set of clamping components 70 includes an elastic element 71 and a clamping plate 72. One end of the elastic element 71 is disposed on the inner wall of the housing 10, and the other end is disposed on the clamping plate 72.

[0070] The clamping plate 72 includes an integrally formed connecting part 721 and a clamping groove 722. The connecting part 721 is connected to the elastic member 71 and is disposed toward the inner wall of the housing 10. The clamping groove 722 is away from the inner wall of the housing 10. The edge of the heat-insulating glass 50 is disposed in the clamping groove 722.

[0071] Specifically, by using two sets of clamping components 70 arranged opposite to each other, the heat-insulating glass 50 is limited and clamped by both sides in the width direction within the housing 10, and a symmetrical clamping force is formed from both sides of the heat-insulating glass 50 in the lateral direction, so as to avoid the light path shift caused by the heat-insulating glass 50 tilting due to force on one side.

[0072] The elastic member 71 provides pre-tightening force to the clamping plate 72, and the connecting part 721 transmits the pre-tightening force to the clamping groove 722. The clamping groove 722 positions and constrains the edge of the heat-insulating glass 50, thereby completing the clamping and positioning without adding additional support members.

[0073] The elastic element 71 is a spring structure that provides a recoverable preload and a deformable elastic force. The preload can absorb the slight dimensional changes caused by the thickness tolerance of the heat-insulating glass 50 and thermal expansion, while the elastic force can be adapted to various sizes or specifications of heat-insulating glass 50 without the need to change the fixture, thereby improving the utilization rate of the equipment.

[0074] In one specific embodiment, the first temperature sensor 61 includes:

[0075] A temperature sensor 611 is attached to the surface of the heat-insulating glass 50 facing or away from the photothermal component 40;

[0076] Temperature measuring component 612 is connected to temperature sensing probe 611 and is used to collect the temperature of heat-insulating glass 50.

[0077] Specifically, the temperature sensor 611 of the first temperature sensor 61 is attached to the surface of the heat-insulating glass 50 to be tested, so that the temperature sensor 611 is in direct contact with the glass body, and the temperature of the heat-insulating glass 50 itself is monitored in real time. This avoids the problem that the cavity temperature meets the standard but the glass body temperature does not meet the test requirements or that the glass body overheating is not detected. In this embodiment, the temperature measuring component 612 supports preset target test temperature of the heat-insulating glass 50. When the temperature of the glass body exceeds the preset value, an alarm will be triggered to ensure that the glass is not damaged due to overheating during the temperature resistance test, and at the same time ensure the accuracy of the temperature resistance test data.

[0078] In one specific embodiment, the housing 10 has a mounting port 11, which communicates with the second cavity 32;

[0079] The testing device 100 further includes an airflow control component 80, which is disposed on the mounting port 11 to block the mounting port 11.

[0080] Specifically, the mounting port 11 is directly connected to the second cavity 32, ensuring that the airflow control component 80 can introduce or exhaust air into the second cavity 32, thereby actively intervening in and controlling the airflow rate and temperature within the second cavity 32. By adjusting the airflow speed and temperature, the surface temperature of the tested heat-insulating glass 50 can be controlled, and a controllable and measurable temperature gradient can be established on both sides of the glass.

[0081] In one specific embodiment, the airflow control component 80 includes:

[0082] The fan housing 81 is fitted over the mounting port 11;

[0083] The first cooling fan 82 is disposed inside the fan housing 81;

[0084] Regulator 83 is connected to the first cooling fan 82 to adjust the airflow speed of the first cooling fan 82;

[0085] The power supply 84 is electrically connected to the regulator 83.

[0086] Specifically, the fan housing 81 is fixed to the outside of the housing 10 using bolts or other fixing structures. The first cooling fan 82 is built into the fan housing 81, and its core function is to generate directional airflow. By controlling the rotation of the fan, it actively draws out hot air from the second cavity 32 or blows in cooling air, thereby controlling the surface temperature of the heat-insulating glass 50. The regulator 83 can be a PWM controller. The regulator 83 is electrically connected to the first cooling fan 82. By changing the output current or voltage signal, it can continuously and precisely linearly adjust the fan speed, thereby achieving stepless control of the airflow speed. The power supply 84 provides a stable power supply to the regulator 83 and the first cooling fan 82, ensuring that their operation is not affected by other parts of the test device 100, and guaranteeing the stability and reliability of the control.

[0087] In one specific embodiment, the photothermal component 40 further includes a heat dissipation component 43, which is connected to the dimmable plate 41;

[0088] The heat dissipation component 43 includes:

[0089] Heat sink 431, the heat sink 431 is attached to the side of the dimmable plate 41 away from the connecting cover 20;

[0090] Heat dissipation pipe 432 extends along the surface of heat dissipation plate 431 and penetrates the opposite sides of heat dissipation plate 431.

[0091] The second cooling fan 433 is positioned directly opposite the heat pipe 432 to dissipate the heat from the heat pipe 432.

[0092] Specifically, a heat sink 431, tightly attached to the back of the dimmable plate 41, is typically made of a metal with high thermal conductivity, such as aluminum alloy or copper. Its function is to rapidly dissipate the enormous heat generated by the dimmable plate 41 during operation, preventing heat accumulation that could lead to overheating and damage to the core components of the plate. To further enhance heat dissipation efficiency, the heat dissipation assembly 43 also includes a heat pipe 432, which runs in a straight line through opposite sides of the heat sink 431. Its function is to utilize the phase change cycle of the internal working fluid to rapidly transfer heat from the heat-generating end attached to the plate to the heat-dissipating end away from the heat source, greatly improving the efficiency of heat conduction. Finally, a second cooling fan 433 is positioned in the far-end heat dissipation area opposite the heat pipe 432. Through forced convection, it rapidly dissipates the heat from the heat pipe 432 and the heat sink to the external environment, thus forming a highly efficient heat dissipation path from the dimmable plate 41, the heat sink 431, and the heat pipe 432.

[0093] In one specific embodiment, the connecting cover 20 has a first light-transmitting port 21 and a second light-transmitting port 22, which are arranged facing each other. The dimmable plate 41 covers the opening end of the first light-transmitting port 21 that is away from the test cavity 30. The housing 10 is connected to the side of the second light-transmitting port 22 that is away from the first light-transmitting port 21.

[0094] When viewed along the horizontal direction of the dimmable plate 41, the inner diameter of the first light-transmitting port 21 is smaller than the inner diameter of the second light-transmitting port 22.

[0095] Specifically, the connecting cover 20 has a first light-transmitting port 21 and a second light-transmitting port 22, which are aligned on the same axis and face each other, forming the channel through which the working light path passes. The dimmable plate 41 tightly covers the outer opening of the first light-transmitting port 21 away from the test chamber 30, acting as a light source sealing cover for the channel, ensuring that light can only enter through this entrance. The housing 10 is connected to the outer end of the second light-transmitting port 22, allowing the light path to enter the test chamber 30 from the connecting cover 20. Viewed horizontally from the dimmable plate 41, the inner diameter of the first light-transmitting port 21 is designed to be smaller than the inner diameter of the second light-transmitting port 22, making the entire channel appear as a gradually widening flared mouth shape.

[0096] Therefore, the aforementioned heat-insulating glass 50 testing device 100, by integrating the dimmable plate 41 into the connecting cover 20 and ensuring its working optical path passes through the test cavity 30 and the heat-insulating glass 50 under test, can simultaneously apply light and heat load at the same station, achieving synergistic loading of thermo-optical coupling stress. This significantly shortens the testing cycle and reduces time and energy costs. The device can realistically simulate the combined photothermal and optical environment of the heat-insulating glass 50 during actual projector operation, effectively reproducing failure modes such as yellowing and transmittance attenuation, significantly improving testing accuracy and operational coverage. Simultaneously, the temperature detection component 60 can monitor the glass and cavity temperature in real time, providing data support for evaluating the performance degradation of the heat-insulating glass 50 under coupling conditions.

[0097] The above description is merely an embodiment of this application. It should be noted that those skilled in the art can make improvements without departing from the inventive concept of this application, but these improvements all fall within the protection scope of this application.

Claims

1. A heat-insulating glass testing device, characterized in that, include: The housing, together with the connecting cover, forms the test chamber; A photothermal assembly is disposed on the side of the connecting cover away from the housing. The photothermal assembly includes a dimmable plate, and the working optical path of the dimmable plate is arranged towards the test cavity. A heat-insulating glass is disposed inside the test cavity and on the working optical path of the dimmable plate, so that the working optical path of the dimmable plate passes through the test cavity via the heat-insulating glass to apply heat to the test cavity; A temperature detection component is used to obtain the temperature of the heat-insulating glass and the test chamber.

2. The heat-insulating glass testing device according to claim 1, characterized in that, The temperature detection component includes: A first temperature sensor is connected to the heat-insulating glass; A second temperature sensor is disposed in the test chamber on the side away from the photothermal component, and the second temperature sensor is connected to the dimmable plate.

3. The heat-insulating glass testing device according to claim 1, characterized in that, The photothermal component further includes a power driver, which is connected to the dimmable plate to drive the dimmable plate to adjust the light intensity.

4. The heat-insulating glass testing device according to claim 2, characterized in that, The heat-insulating glass is disposed in the test chamber to divide the test chamber into a first chamber and a second chamber; The first cavity is located on the side of the test cavity close to the photothermal component; The second cavity is located on the side of the test cavity away from the photothermal component, and the second temperature sensor is located inside the second cavity.

5. The heat-insulating glass testing device according to claim 1, characterized in that, The testing device further includes: at least two sets of clamping components, which are respectively disposed on the inner walls of opposite sides of the housing and arranged opposite to each other, and the heat-insulating glass is disposed between the two sets of clamping components; Each set of clamping components includes an elastic element and a clamping plate. One end of the elastic element is disposed on the inner wall of the housing, and the other end is disposed on the clamping plate. The clamping plate includes an integrally formed connecting part and a clamping groove. The connecting part is connected to the elastic element and is disposed towards the inner wall of the housing. The clamping groove is away from the inner wall of the housing, and the edge of the heat-insulating glass is disposed in the clamping groove.

6. The heat-insulating glass testing device according to claim 2, characterized in that, The first temperature sensor includes: A temperature sensor is attached to the surface of the heat-insulating glass facing or away from the photothermal component; A temperature measuring component, connected to the temperature sensing probe, is used to collect the temperature of the heat-insulating glass.

7. The heat-insulating glass testing device according to claim 4, characterized in that, The housing has an installation port, which communicates with the second cavity; The testing device further includes an airflow control component, which is disposed on the mounting port to block the mounting port.

8. The heat-insulating glass testing device according to claim 7, characterized in that, The airflow control component includes: The fan casing is fitted over the mounting port; The first cooling fan is located inside the fan housing; A regulator is connected to the first cooling fan to adjust the fan speed of the first cooling fan; The power supply is electrically connected to the regulator.

9. The heat-insulating glass testing device according to claim 1, characterized in that, The photothermal component further includes: a heat dissipation component, which is connected to the dimmable plate; The heat dissipation component includes: A heat sink is attached to the side of the dimmable plate opposite to the connecting cover. A heat dissipation pipe extends along the surface of the heat dissipation plate and penetrates the opposite sides of the heat dissipation plate; The second cooling fan is positioned directly opposite the heat pipe to dissipate the heat from the heat pipe.

10. The heat-insulating glass testing device according to claim 1, characterized in that, The connecting cover has a first light-transmitting port and a second light-transmitting port, which are directly opposite each other. The dimmable plate covers the opening end of the first light-transmitting port that is away from the test cavity. The housing is connected to the side of the second light-transmitting port that is away from the first light-transmitting port. When viewed along the horizontal direction of the dimmable plate, the inner diameter of the first light-transmitting port is smaller than the inner diameter of the second light-transmitting port.

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