Intelligent composite window with switchable working configuration

Abstract

The intelligent composite window comprises a window frame, an electrochromic glass unit, a flexible regression reflection film unit and a control unit, the electrochromic glass unit, the flexible regression reflection film unit and the control unit are fixedly installed on the window frame, the electrochromic glass unit is connected to the control unit, and the control unit controls the flexible regression reflection film unit according to the outdoor environment temperature. A control mode needing to be triggered at present is recognized according to a preset temperature threshold value, an electric control signal is generated accordingly, and the electric control signal is sent to the electrochromic glass unit so as to dynamically adjust the light transmitting state of the electrochromic glass unit; the flexible regression reflection film unit is movably arranged on the window frame, the control unit controls the flexible regression reflection film unit to move between a covering position and a folding position according to the outdoor environment temperature and the environment self-adaption control logic, and when the flexible regression reflection film unit is located at the covering position, the flexible regression reflection film unit covers the outer side surface of the electrochromic glass unit; in the stowed position, the flexible retro-reflective film unit is moved away to expose the electrochromic glass unit.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of intelligent buildings and building energy saving, in particular to an intelligent composite window with switchable working configurations. BACKGROUND

[0002] In buildings, the heat loss through windows accounts for a large proportion of the heat loss of the building envelope. The heat gain in summer is the main reason for the high indoor temperature and the surge in air conditioning energy consumption. Therefore, developing intelligent windows that can dynamically adjust solar radiation is one of the core topics in the field of building energy saving. At present, the mainstream technical route and its limitations are as follows:

[0003] (1) Electrochromic glass is composed of an electrochromic layer (such as tungsten trioxide WO3) and an ion conductor layer sandwiched between two glass substrates. After applying a low-voltage direct current electric field, ions are injected / extracted from the electrochromic layer, causing changes in its optical properties, and realizing reversible switching between transparent and colored states. However, electrochromic glass mainly achieves solar shading by absorbing solar radiation. In the colored state, the absorbed solar energy (especially near-infrared radiation) will be converted into heat, causing the glass itself to significantly increase in temperature. This heat is then transferred to the indoor side again through two forms of long-wave infrared radiation and convective heat exchange, resulting in a significant reduction in the actual thermal insulation efficiency, especially when dealing with extreme solar radiation in summer. Essentially, it is a "heat-absorbing" solar shading, rather than a "heat-insulating" solar shading.

[0004] (2) Retroreflective materials are functional materials that can reflect most of the incident light back along the original light path. Common structures include micro-prism arrays and glass micro-bead types. When applied to building exterior windows, they can theoretically "reject" solar radiation from the window, achieving extremely high thermal insulation efficiency. However, their traditional application forms have a fatal weakness: they usually exist in the form of fixed films or coatings, lacking dynamic adjustment capabilities. This results in the blocking of beneficial solar radiation heat gain in winter or transitional seasons, increasing the heating load and failing to maximize energy savings throughout the year. Their fixed high-reflectivity state also permanently affects the view and natural lighting.

[0005] In addition, traditional indoor shading devices such as blinds and roller shutters are usually installed indoors or in double-glazed cavities. This results in the fact that solar radiation has already entered the room through the glass, and the shading device itself becomes a heat source, heating the indoor air through convection and radiation, with minimal thermal insulation effect.

[0006] In summary, the prior art has the contradiction that the "adjustment ability" and "heat insulation efficiency" are difficult to be compatible, and the traditional single-function heat insulation or light transmission technology cannot meet the complex and variable environmental requirements, and a smart window solution capable of flexible and active switching among various states such as "high-efficiency light transmission", "solar radiation absorption", and "high-efficiency reflective heat insulation" according to different environmental conditions is needed to break through the bottleneck of the prior art and realize the overall improvement of the performance of the smart window. SUMMARY

[0007] The technical problem to be solved by the present application is to provide a smart composite window with switchable working configurations to solve the problems of the prior art.

[0008] The technical solution for solving the above technical problem is as follows: A smart composite window with switchable working configurations, comprising a window frame, an electrochromic glass unit fixedly installed on the window frame, a flexible return reflective film unit, and a control unit, wherein:

[0009] The electrochromic glass unit is connected to the control unit, and the control unit identifies the required control mode according to the preset temperature threshold value comparison according to the outdoor environment temperature, and generates an electric control signal and sends the electric control signal to the electrochromic glass unit to dynamically adjust the light transmission state of the electrochromic glass unit;

[0010] The flexible return reflective film unit is movably arranged on the window frame, and the control unit controls the flexible return reflective film unit to move between the covering position and the stowed position according to the environmental adaptive control logic according to the outdoor environment temperature, wherein:

[0011] In the covering position, the flexible return reflective film unit covers the outer surface of the electrochromic glass unit;

[0012] In the stowed position, the flexible return reflective film unit is moved away to expose the electrochromic glass unit.

[0013] Further, the flexible return reflective film unit comprises a reel mechanism and a flexible return reflective film, the reel mechanism is installed at the top or side of the window frame, one end of the flexible return reflective film is wound in the reel mechanism, and the other end can be driven to unfold downward or unfold to the side to the covering position, and be retracted to the stowed position in the reel mechanism.

[0014] Further, the reel mechanism is an electric reel with a built-in drive motor, and the drive motor is electrically connected to the control unit, and the control unit controls the drive motor according to the real-time monitoring situation to drive the flexible return reflective film unit to move between the covering position and the stowed position.

[0015] Further, the control unit controls the movement of the flexible retroreflective film unit between the covering position and the stowed position according to the following steps:

[0016] (1) Obtain the outdoor ambient temperature , and according to the preset temperature threshold, calculate the temperature difference between the current temperature and the threshold by the formula ;

[0017] (2) Obtain the outdoor light intensity I, and according to the preset light intensity threshold , calculate the light intensity deviation rate by the formula ;

[0018] (3) Based on the temperature difference and the light intensity deviation rate , calculate the comprehensive environment index E from the vector synthesis angle ;

[0019] (4) When the comprehensive environment index E is greater than the preset comprehensive environment threshold , the control unit drives the flexible retroreflective film unit to expand to the covering position;

[0020] (5) When the comprehensive environment index E is less than or equal to the preset comprehensive environment threshold , the control unit drives the flexible retroreflective film unit to stow to the stowed position.

[0021] Further, the control unit generates an electric control signal according to the following steps:

[0022] (1) Based on the preset temperature threshold comparison, identify the control mode required to be triggered at present, which includes full light transmission mode, privacy heat insulation mode, high temperature reflection mode and sunshade mode;

[0023] (2) According to the identified control mode, the control unit retrieves the control voltage value corresponding to the mode from the preset parameter library, and combines the specification characteristics of the electrochromic glass unit to fine tune and optimize the retrieved control voltage value, so as to generate an electric control signal for dynamically adjusting the light transmission state of the electrochromic glass unit.

[0024] Further, the light transmission state of the electrochromic glass unit is dynamically adjusted by the following method:

[0025] (1) When the control unit determines that the full light transmission mode or the sunshade mode is required to be triggered at present, it generates a first electric control signal corresponding to the target bleaching voltage, which is used to control the voltage size and duration applied to the electrochromic glass unit, and drives the ions to be extracted from the electrochromic glass, so that the glass is converted to transparent state;​​

[0026] (2) The control unit generates a second electric control signal corresponding to the target coloring voltage when it is determined that the privacy heat insulation mode or the high-temperature reflection mode is currently required, and the second electric control signal is used to regulate the voltage intensity and the action time length applied to the electrochromic glass unit, so that the ions are uniformly injected into the electrochromic glass at a predetermined rate and distribution, and the glass is converted into a colored state.

[0027] Further, in the full light transmission mode, the electrochromic glass unit is switched to a high-transmittance transparent state, and the flexible return reflection film unit is in a retracted position, at this time, the entire window is only transparent electrochromic glass, and the view transmittance can maximize the transmission of sunlight;

[0028] In the sunshade mode, the electrochromic glass unit is switched to a high-transmittance transparent state, and the flexible return reflection film unit is deployed and covers the outer surface of the electrochromic glass unit, at this time, the flexible return reflection film unit reflects most of the solar radiation heat back to the outside, which can effectively reduce the indoor heat gain, and the high-transmittance characteristic of the electrochromic glass unit can ensure sufficient natural lighting in the room, achieving a good balance between heat insulation and lighting;

[0029] In the high-temperature reflection mode, the electrochromic glass unit is switched to a low-transmittance colored state, and the flexible return reflection film unit is deployed and covers the outer surface of the electrochromic glass unit, at this time, the flexible return reflection film unit reflects most of the incident solar radiation light back along the original path, and the low-transmittance characteristic of the electrochromic glass unit prevents part of the heat that is not reflected from entering the room, achieving the strongest heat insulation effect;

[0030] In the privacy heat insulation mode, the electrochromic glass unit is in a low-transmittance colored state, and the flexible return reflection film unit is in a retracted position, at this time, the low-transmittance characteristic of the electrochromic glass unit can play a good heat insulation role and prevent the outside from peeping into the room.

[0031] The beneficial effects of the present application are:

[0032] (1) The light transmittance state of the electrochromic glass unit can be flexibly controlled by the control unit according to different use scenarios and requirements, and the return reflection characteristic of the flexible return reflection film unit is used to realize precise and dynamic regulation of indoor light and heat;

[0033] (2) Through the cooperative work of the electrochromic glass unit and the flexible return reflection film unit, the indoor heat exchange can be better controlled, the indoor temperature can be kept relatively stable, and the indoor temperature fluctuation caused by the drastic change of the outside temperature can be reduced, thereby creating a more comfortable thermal environment for the indoor personnel;

[0034] (3) It solves the problem that existing technologies cannot balance high-efficiency heat insulation and dynamic adaptability. It can achieve active management of solar radiation heat gain and precise control of solar transmittance according to different seasons, weather and user needs, and significantly reduce building air conditioning energy consumption.

[0035] (4) The traditional "absorption" mechanism is transformed into a "reflection" mechanism, which physically blocks the heat transfer path and the heat insulation performance is far higher than that of single electrochromic technology. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the overall layout of an intelligent composite window with switchable working configuration disclosed in this invention.

[0037] Figure 2 This is a partial layout schematic diagram of an intelligent composite window with switchable working configuration disclosed in this invention;

[0038] Figure 3 This is a flowchart illustrating the process of generating electronic control signals from the control unit.

[0039] In the diagram: 1. Window frame; 2. Electrochromic glass unit fixedly installed on the window frame; 3. Flexible retroreflective film unit; 31. Roll mechanism; 32. Flexible retroreflective film; 4. Control unit. Detailed Implementation

[0040] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0041] like Figure 1 As shown, this application discloses a smart composite window with switchable working configuration. The smart composite window includes a window frame 1, an electrochromic glass unit 2 fixedly installed on the window frame, a flexible retroreflective film unit 3, and a control unit 4, wherein:

[0042] The electrochromic glass unit 2 is connected to the control unit 4. The control unit 4 identifies the control mode to be triggered based on the outdoor ambient temperature and a preset temperature threshold, and generates an electronic control signal and sends the electronic control signal to the electrochromic glass unit 2 to dynamically adjust its light transmission state.

[0043] The flexible retroreflective film unit 3 is movably mounted on the window frame 1. The control unit 4 controls the movement of the flexible retroreflective film unit 3 between the covered position and the retracted position according to the outdoor ambient temperature and environmental adaptive control logic.

[0044] In the covered position, the flexible retroreflective film unit 3 covers the outer surface of the electrochromic glass unit 2.

[0045] In the stowed position, the flexible return reflective film unit 3 is moved away to expose the electrochromic glass 2 unit.

[0046] As can be seen from the above, the smart composite window with switchable working configuration disclosed by the present application can flexibly control the light transmission state of the electrochromic glass unit and utilize the return reflection characteristics of the flexible return reflective film unit to achieve precise and dynamic regulation of indoor light and heat according to different use scenarios and requirements; through the cooperative work of the electrochromic glass unit and the flexible return reflective film unit, indoor heat exchange can be better controlled, indoor temperature can be kept relatively stable, and indoor temperature fluctuations caused by drastic changes in external temperature can be reduced, thereby creating a more comfortable thermal environment for indoor personnel; the problem that the prior art cannot balance high-efficiency heat insulation and dynamic adaptability is solved, active management of solar radiation heat and precise control of solar transmittance can be achieved for different seasons, weather and user needs, and building air conditioning energy consumption is significantly reduced; the "absorption" mechanism of traditional technology is changed into a "reflection" mechanism, which physically blocks the heat transfer path, and the heat insulation efficiency is much higher than that of single electrochromic technology.

[0047] In one of the embodiments, referring to Figure 2 , the flexible return reflective film unit 3 includes a reel mechanism 31 and a flexible return reflective film 32, the reel mechanism 31 is installed at the top or side of the window frame 1, one end of the flexible return reflective film 32 is wound in the reel mechanism 31, and the other end can be driven to be unfolded downward or unfolded to the side to the covering position, and retracted to the stowed position in the reel mechanism.

[0048] Specifically, the inside of the reel mechanism is provided with a driving motor and a transmission assembly, and the driving motor is electrically connected with the control unit. When the control unit issues an unfolding instruction, the driving motor starts to drive one end of the flexible return reflective film to extend out of the reel mechanism through the transmission assembly (such as gear transmission or belt transmission). If it needs to be unfolded downward, the transmission assembly will control the film to descend uniformly in the vertical direction to the covering position; if it needs to be unfolded to the side, the film will be smoothly moved to the covering position along the side track according to the preset path. When the retraction instruction is received, the driving motor reverses to rewind the flexible return reflective film back into the reel mechanism to the stowed position, and the whole process is monitored in real time by the control unit to ensure the accuracy and stability of the action.

[0049] In one of the embodiments, the reel mechanism is an electric reel and has a built-in driving motor, the driving motor is electrically connected with the control unit, and the driving motor is controlled by the control unit according to real-time monitoring to drive the movement of the flexible return reflective film unit between the covering position and the stowed position.

[0050] In one embodiment, the control unit controls the movement of the flexible retroreflective film unit between the covered position and the retracted position according to the following steps:

[0051] (1) Obtain outdoor ambient temperature And based on the preset temperature threshold, through the formula Calculate the temperature difference between the current temperature and the threshold. .

[0052] Specifically, this application uses a temperature sensor installed on the outside of the window frame to detect the outdoor ambient temperature in real time. The temperature sensor converts the collected analog temperature signal into a digital signal and transmits it to the control unit. The control unit reads the preset temperature threshold and then calculates the temperature difference according to the above formula.

[0053] (2) Obtain the outdoor light intensity I, and determine the light intensity threshold based on the preset threshold value. Through formula The light intensity deviation rate was calculated. .

[0054] Specifically, this application uses a light intensity sensor installed on the outside of the window frame to measure the outdoor light intensity, converts the obtained light signal into an electrical signal, and then sends it to the control unit after analog-to-digital conversion. The control unit then obtains a preset light intensity threshold and calculates the light intensity deviation rate according to a given formula.

[0055] (3) Based on the temperature difference and the light intensity deviation rate From the perspective of vector composition The comprehensive environmental index E is calculated.

[0056] Specifically, the parameters α and β were set with reference to relevant indoor environmental assessment standards. During the calculation, the temperature difference value acquired and calculated in real time was first... and light intensity deviation rate Multiply each product by the corresponding weighting coefficients α and β, then square the results and add them together. Finally, take the square root of the sum to obtain the comprehensive environmental index E.

[0057] (4) When the comprehensive environmental index E is greater than the preset comprehensive environmental threshold At that time, the control unit drives the flexible retroreflective film unit to unfold to the coverage position.

[0058] Specifically, when the comprehensive environmental index E is greater than a preset comprehensive environmental threshold... When the temperature difference and the light intensity deviation rate jointly exceed the comfortable range of indoor environment, it proves that the adverse effect of outdoor environment on indoor environment has reached the degree that heat insulation and light shielding measures are needed, and the flexible return reflection film unit is driven by the control unit to be deployed to the covering position.

[0059] (5) When the comprehensive environment index E is less than or equal to the preset comprehensive environment threshold , the flexible return reflection film unit is driven by the control unit to be retracted to the retracted position.

[0060] Specifically, when the comprehensive environment index E is less than or equal to the preset comprehensive environment threshold , it means that the adverse effect of outdoor environment on indoor environment is within an acceptable range, and the demand for natural lighting and natural heat exchange with the outside world in the indoor environment is more prominent. In this case, the flexible return reflection film unit is retracted to the retracted position, allowing more natural light to enter the indoor environment, improving the brightness and transparency of the indoor environment, reducing the use of artificial lighting, and thus saving energy.

[0061] In one embodiment, referring to Figure 3 , the control unit generates an electric control signal according to the following steps:

[0062] (1) Based on the preset temperature threshold comparison, the current required control mode is identified, and the control mode includes full light transmission mode, privacy heat insulation mode, high temperature reflection mode and sunshade mode.

[0063] Specifically, the present application determines the specific mode to be entered by judging whether the temperature condition threshold, light intensity and day and night judgment corresponding to the full light transmission mode, privacy mode, high temperature reflection mode or sunshade mode are met. For example, when the outdoor environment temperature is lower than the preset low temperature threshold, the light intensity is weak, and it is in the daytime period, it is determined that the full light transmission mode condition is met, and the control unit triggers the mode to make the electrochromic glass present the maximum light transmission state. In the current mode, the transmission of sunlight is maximized, allowing sufficient visible light and solar radiant heat to enter the indoor environment. When the outdoor environment temperature is higher than the preset high temperature threshold and the light intensity is extremely high, it is determined that the high temperature reflection mode condition is met, and the control unit triggers the mode to make the electrochromic glass colored, and the flexible return reflection film unit is deployed and covers the outer surface of the electrochromic glass unit, reflecting most of the solar radiation back to block the heat from entering the indoor environment.

[0064] (2) According to the identified control mode, the control unit retrieves the control voltage value corresponding to the mode from the preset parameter library, and optimizes the retrieved control voltage value in combination with the specification characteristics of the electrochromic glass unit to generate an electric control signal for dynamically adjusting the light transmission state thereof.

[0065] Specifically, the application will monitor the temperature of the electrochromic glass in real time , and compare it with the standard working temperature . If there is , it means that the ion migration speed is accelerated, which may cause the color change to be too fast or uneven. At this time, the application will fine-tune and optimize the initial voltage value obtained according to the formula: (wherein is an empirical coefficient) to slow down the ion migration speed and make the color change more stable. If there is , it means that the ion migration speed is slowing down. At this time, the application will fine-tune and optimize the initial voltage value obtained according to the formula: to speed up the ion migration and ensure that the color change is completed on time.

[0066] In one embodiment, the light transmission state of the electrochromic glass unit is dynamically adjusted in the following way:

[0067] (1) When the control unit determines that the full-transmission mode or the sunshade mode needs to be triggered, it generates a first electric control signal corresponding to the target bleaching voltage, which is used to control the voltage size and duration applied to the electrochromic glass unit, driving the ions to be extracted from the electrochromic glass and making the glass change to a transparent state.

[0068] (2) When the control unit determines that the privacy heat insulation mode or the high-temperature reflection mode needs to be triggered, it generates a second electric control signal corresponding to the target coloring voltage, which is used to regulate the voltage intensity and action time applied to the electrochromic glass unit, ensuring that the ions are injected into the electrochromic glass at a predetermined rate and distribution, making the glass change to a colored state.

[0069] In one embodiment, in the full-transmission mode, the electrochromic glass unit switches to a high-transmission transparent state, and the flexible return reflection film unit is in a retracted position. At this time, the entire window is only transparent electrochromic glass, and its field of view is maximized for sunlight transmission.

[0070] In the sunshade mode, the electrochromic glass unit switches to a high-transmission transparent state, and the flexible return reflection film unit is deployed and covers the outer surface of the electrochromic glass unit. At this time, the flexible return reflection film unit reflects most of the solar radiation heat back to the outside, effectively reducing the indoor heat gain, and the high-transmission characteristic of the electrochromic glass unit ensures sufficient natural lighting in the room, achieving a good balance between heat insulation and lighting.

[0071] In the high-temperature reflection mode, the electrochromic glass unit is switched to a low-transmittance colored state, and the flexible return reflection film unit is unfolded and covers the outer surface of the electrochromic glass unit. At this time, the flexible return reflection film unit reflects most of the incident solar radiation light back along the original path, and the low transmittance of the electrochromic glass unit prevents part of the unreflected heat from entering the room, achieving the strongest heat insulation effect.

[0072] In the privacy heat insulation mode, the electrochromic glass unit is in a low-transmittance colored state, and the flexible return reflection film unit is in a retracted position. At this time, the low transmittance of the electrochromic glass unit can play a good heat insulation effect and prevent the outside from peeping into the indoor situation.

[0073] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A smart composite window with switchable working configuration, characterized in that, The intelligent composite window includes a window frame, an electrochromic glass unit fixedly installed on the window frame, a flexible retroreflective film unit, and a control unit, wherein: The electrochromic glass unit is connected to the control unit. The control unit identifies the control mode to be triggered based on the outdoor ambient temperature and a preset temperature threshold, and generates an electronic control signal and sends the electronic control signal to the electrochromic glass unit to dynamically adjust its light transmission state. The flexible retroreflective film unit is movably mounted on the window frame. The control unit controls the movement of the flexible retroreflective film unit between a covered position and a retracted position according to the outdoor ambient temperature and environmental adaptive control logic. In the covered position, the flexible retroreflective film unit covers the outer surface of the electrochromic glass unit; When in the retracted position, the flexible retroreflective film unit is moved away to expose the electrochromic glass unit.

2. The intelligent composite window according to claim 1, characterized in that, The flexible retroreflective film unit includes a roll mechanism and a flexible retroreflective film. The roll mechanism is installed on the top or side of the window frame. One end of the flexible retroreflective film is wound inside the roll mechanism, and the other end can be driven to unfold downwards or to the side to cover the film, and to retract into a stowed position inside the roll mechanism.

3. The intelligent composite window according to claim 2, characterized in that, The reel mechanism is an electric reel with a built-in drive motor. The drive motor is electrically connected to the control unit, which controls the drive motor according to real-time monitoring to drive the flexible retroreflective film unit to move between the covered position and the retracted position.

4. The intelligent composite window according to claim 1, characterized in that, The control unit controls the movement of the flexible retroreflective film unit between the covered position and the retracted position according to the following steps: (1) Obtain outdoor ambient temperature And based on the preset temperature threshold, through the formula Calculate the temperature difference between the current temperature and the threshold. ; (2) Obtain the outdoor light intensity I, and determine the light intensity threshold based on the preset threshold value. Through formula The light intensity deviation rate was calculated. ; (3) Based on the temperature difference and the light intensity deviation rate From the perspective of vector composition The comprehensive environmental index E is calculated. (4) When the comprehensive environmental index E is greater than the preset comprehensive environmental threshold At that time, the control unit drives the flexible retroreflective film unit to unfold to the coverage position; (5) When the comprehensive environmental index E is less than or equal to the preset comprehensive environmental threshold At that time, the control unit drives the flexible retroreflective film unit to retract to the retracted position.

5. The intelligent composite window according to claim 1, characterized in that, The control unit generates the electronic control signal according to the following steps: (1) Based on the comparison of preset temperature thresholds, identify the control mode to be triggered. The control module includes full light transmission mode, privacy heat insulation mode, high temperature reflection mode and sunshade mode. (2) Based on the identified control mode, the control unit retrieves the control voltage value corresponding to the mode from the preset parameter library, and, in combination with the specifications and characteristics of the electrochromic glass unit, fine-tunes and optimizes the retrieved control voltage value to generate an electronic control signal for dynamically adjusting its light transmission state.

6. The intelligent composite window according to claim 5, characterized in that, The light transmittance of the electrochromic glass unit can be dynamically adjusted in the following ways: (1) When the control unit determines whether the full light transmission mode or the shading mode needs to be triggered, it generates a first electronic control signal corresponding to the target fading voltage. The first electronic control signal is used to control the magnitude and duration of the voltage applied to the electrochromic glass unit, driving ions to be extracted from the electrochromic glass and causing the glass to become transparent. (2) When the control unit determines whether the privacy insulation mode or the high temperature reflection mode needs to be triggered, it generates a second electronic control signal corresponding to the target coloring voltage. The second electronic control signal is used to regulate the voltage intensity and duration applied to the electrochromic glass unit to ensure that ions are injected into the electrochromic glass at a predetermined rate and distribution, so that the glass is transformed into a colored state.

7. The intelligent composite window according to claim 6, characterized in that, In full-transparency mode, the electrochromic glass unit switches to a highly transparent state, while the flexible retroreflective film unit is in the retracted position. At this time, the window is only transparent electrochromic glass, which maximizes the transmission of sunlight. In shading mode, the electrochromic glass unit switches to a highly transparent state with high light transmittance. At the same time, the flexible retroreflective film unit unfolds and covers the outer surface of the electrochromic glass unit. At this time, the flexible retroreflective film unit reflects most of the solar radiation heat back to the outside, which can effectively reduce indoor heat gain. The high light transmittance of the electrochromic glass unit can also ensure sufficient natural light indoors, achieving a good balance between heat insulation and light transmission. In high-temperature reflection mode, the electrochromic glass unit switches to a low-transmittance tinted state, while the flexible retroreflective film unit unfolds and covers the outer surface of the electrochromic glass unit. At this time, the flexible retroreflective film unit reflects most of the incident solar radiation back along the original path, while the low transmittance of the electrochromic glass unit prevents some of the unreflected heat from entering the room, achieving the strongest heat insulation effect. In privacy and heat insulation mode, the electrochromic glass unit is in a low-transmittance colored state, while the flexible retroreflective film unit is in the retracted position. At this time, the low light transmittance of the electrochromic glass unit can play a good role in heat insulation and prevent outsiders from peeping into the indoor situation.

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