A photovoltaic window and a temperature regulation system and method based on the photovoltaic window

Abstract

The application discloses a photovoltaic window, and relates to the technical field of photovoltaic windows, which comprises a first transparent plate, a second transparent plate, a radiation refrigeration film and a transparent photovoltaic plate; a fluid channel is formed between the first transparent plate, the second transparent plate and a frame, a fluid inlet and a fluid outlet which are both connected to the fluid channel are arranged on the body, the fluid inlet can be used to introduce a light-transmitting fluid, the fluid outlet can be used to discharge the light-transmitting fluid and is also connected to a heat exchange device, the light-transmitting fluid is used to absorb radiation in a non-photovoltaic wave band and convert the radiation into heat; the radiation refrigeration film is arranged on the inner side of the second transparent plate, the radiation refrigeration film can transmit sunlight and radiate refrigeration; the transparent photovoltaic plate is used to be electrically connected to an electric device, the transparent photovoltaic plate can make visible light transmit and generate electricity by using solar radiation. The photovoltaic window can meet the demand of overall temperature regulation in a building, so that the building can be heated and cooled. The application further provides a temperature regulation system and a regulation method based on the photovoltaic window.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic window technology, and in particular to a photovoltaic window and a temperature control system and method based on the photovoltaic window. Background Technology

[0002] With the increasing global energy demand and the growing severity of environmental pollution, the development and utilization of renewable energy has become a focus of social attention. Solar energy, as a clean and renewable energy source, has enormous development potential. Among these, "energy conservation and emission reduction" in buildings has become a trend, and building-integrated photovoltaics (BIPV) is gradually becoming a new hotspot in building energy conservation. Compared to traditional windows, photovoltaic windows, as a functional part of the building structure, can also provide electricity for indoor lighting; however, photovoltaic windows may experience reduced power generation efficiency due to overheating under sunlight. Therefore, it is possible to utilize the heat generated by photovoltaic windows while simultaneously reducing their temperature to improve their power generation efficiency. For example, the photovoltaic window power generation and heating system provided by patent CN201510907195.2 uses a cooling medium between the photovoltaic panel and the glass panel, which can effectively reduce the surface temperature of the photovoltaic cells and improve their photoelectric conversion efficiency. Furthermore, it can also obtain corresponding heat energy for indoor use, greatly improving the overall efficiency of the system. However, this type of photovoltaic window cannot achieve the effect of indoor cooling and is difficult to apply to the overall control of the building's temperature. Summary of the Invention

[0003] The purpose of this invention is to provide a photovoltaic window and a temperature control system and method based on the photovoltaic window to solve the problems existing in the prior art, and to meet the needs of overall temperature control in buildings, so as to achieve heating and cooling in buildings.

[0004] To achieve the above objectives, the present invention provides the following solution:

[0005] This invention provides a photovoltaic window, comprising a body, the body including a frame and a first transparent plate, a second transparent plate, a radiation-cooling film, and a transparent photovoltaic panel sequentially distributed along the thickness direction and connected to the frame; a fluid channel is formed between the first transparent plate and the second transparent plate and the frame; the body is provided with a fluid inlet and a fluid outlet both connected to the fluid channel; the fluid inlet allows light-transmitting fluid to enter, and the fluid outlet allows the light-transmitting fluid to exit and is also connected to a heat exchange device; the light-transmitting fluid is used to absorb radiation in non-photovoltaic bands and convert it into heat; the radiation-cooling film is disposed on the inner side of the second transparent plate and is attached to the transparent photovoltaic panel; the radiation-cooling film allows sunlight to pass through and can radiate cooling; the transparent photovoltaic panel is used for electrical connection to electrical equipment; the transparent photovoltaic panel allows sunlight to pass through and can generate electricity.

[0006] Preferably, the first transparent plate and the second transparent plate are made of a transparent polymer; the light-transmitting fluid is a water-based solution filled with nanoparticles.

[0007] Preferably, the radiative cooling film is used for radiative heat exchange with the outside world through an atmospheric window in the 8μm to 13μm wavelength range.

[0008] This invention also provides a temperature control system, including a liquid storage component, a control valve assembly, a drive component, a first monitoring component, a central control component, and a photovoltaic window as described above. The photovoltaic window is installed on a building wall. The fluid inlet is connected to the light-transmitting fluid through a first pipeline, and the fluid outlet is connected to the light-transmitting fluid through a second pipeline, with a branch pipeline for connecting to the heat exchange device connected to the second pipeline. The liquid storage component is used to store the light-transmitting fluid and is connected to both the first and second pipelines. The control valve assembly is used to control the connection and disconnection between the fluid inlet and the liquid storage component, and between the fluid outlet and the liquid storage component and the heat exchange device. The drive component is used to drive the light-transmitting fluid. The first monitoring component is used to monitor the temperature information inside the building. The central control component is communicatively connected to the first monitoring component and is used to receive the temperature information. It is also communicatively connected to the control valve assembly and the drive component and is used to control the operation of the control valve assembly and the drive component.

[0009] Preferably, it further includes a second monitoring component for monitoring solar radiation intensity information; the central control component is communicatively connected to the second monitoring component and is used to receive the solar radiation intensity information.

[0010] Preferably, the control valve assembly includes a first control valve and a second control valve that are communicatively connected to the central control component; the first control valve is disposed on the first pipeline and is used to control the connection and disconnection between the first pipeline and the liquid storage component; the second control valve is disposed at the fluid outlet and is connected to the second pipeline and the branch pipeline, and the second control valve is used to control the connection between the fluid outlet and the second pipeline or the branch pipeline.

[0011] Preferably, the device further includes an inverter electrically connected to the transparent photovoltaic panel. The inverter is also used to electrically connect to the electrical equipment. The inverter is used to receive and store the electrical energy of the transparent photovoltaic panel and to provide the electrical energy required by the electrical equipment.

[0012] Preferably, the driving component is configured as a fluid pump and is disposed on the first pipeline.

[0013] The present invention also provides a temperature control method. Based on the above-described temperature control system, a central control component receives temperature information monitored by the first monitoring component. The central control component compares the building temperature with a set threshold based on the temperature information. If the building temperature is less than the set threshold, the light-transmitting fluid is controlled to continuously enter the fluid channel and enter the heat exchange device. If the building temperature is not less than the set threshold, the light-transmitting fluid is controlled to continuously enter the fluid channel and enter the liquid storage component. Alternatively, the light-transmitting fluid in the fluid channel is drained.

[0014] Preferably, the system further includes: the temperature control system includes a second monitoring component that is communicatively connected to the central control component; the second monitoring component is used to monitor solar radiation intensity information and send it to the central control component; the central control component compares the solar radiation intensity with a set first threshold based on the solar radiation intensity information.

[0015] If the solar radiation intensity is greater than a set first threshold, the central control unit controls the control valve assembly to connect the fluid inlet to the liquid storage component, and the central control unit controls the drive component to drive the light-transmitting fluid to continuously enter the fluid channel through the fluid inlet; if the temperature inside the building is less than a set second threshold, the central control unit controls the control valve assembly to connect the fluid outlet to the heat exchange device; if the temperature inside the building is not less than the set second threshold, the central control unit controls the control valve assembly to connect the fluid outlet to the liquid storage component.

[0016] If the solar radiation intensity is not greater than a set first threshold, and if the building temperature is less than a set third threshold, the central control unit controls the control valve assembly to connect the fluid inlet to the liquid storage component and the fluid outlet to the heat exchanger. The central control unit controls the drive component to drive the light-transmitting fluid to continuously enter the fluid channel through the fluid inlet and to enter the heat exchanger through the fluid outlet. If the building temperature is not less than the set third threshold, the central control unit controls the control valve assembly to connect the fluid inlet to the liquid storage component and controls the drive component to drive the light-transmitting fluid to flow back to the liquid storage component through the fluid inlet to empty the fluid channel.

[0017] The present invention achieves the following technical effects compared to the prior art:

[0018] The photovoltaic window provided by this invention is connected to the building wall via a frame. Sunlight can sequentially pass through a first transparent panel, a light-transmitting fluid in a fluid channel, a second transparent panel, a radiative cooling film, and a transparent photovoltaic panel to enter the building. The transparent photovoltaic panel generates photovoltaic power to supply electrical equipment. At night, if the building's interior temperature is high, the radiative cooling film can provide radiative cooling, thereby lowering the building's interior temperature. If the building's interior temperature is low, the light-transmitting fluid is introduced into the fluid channel through a fluid inlet, forming a fluid barrier within the fluid channel. This fluid barrier can block the radiative cooling film from absorbing heat and carrying it through the fluid outlet into a heat exchange device, thus cooling the building. Internal heat exchange occurs; during the day, a transparent fluid is continuously introduced into the fluid channel through the fluid inlet, carrying away and absorbing heat from non-photovoltaic wavelengths of sunlight and radiant heat from the transparent photovoltaic panels. If the building's internal temperature is low, the transparent fluid enters the heat exchange equipment through the fluid outlet to heat the building's interior or enters the indoor heat storage and exchange equipment to heat the interior when the temperature is low at night. If the building's internal temperature is high, the transparent fluid flows to the outside through the fluid outlet to continuously carry away heat, thereby cooling the building's interior and the transparent photovoltaic panels. Thus, the photovoltaic window provided by this invention can be applied to scenarios involving overall temperature control within a building, achieving both heating and cooling.

[0019] The present invention also provides a temperature control system in which the central control component can determine whether it is necessary to introduce light-transmitting fluid into the fluid channel based on the building temperature information monitored by the first monitoring component; wherein the supply or circulation of light-transmitting fluid is realized by setting a liquid storage component; and the flow direction of light-transmitting fluid is controlled by a control valve assembly and a drive component, thus facilitating the automatic control of the building temperature.

[0020] This invention also provides a temperature control method. The central control unit compares the temperature information monitored by the first monitoring unit with a set threshold. If the building's internal temperature is lower than the set threshold, it indicates that the building's internal temperature is low and heating is required. At night, a light-transmitting fluid enters the fluid channel to form a fluid barrier, blocking the radiative cooling of the radiative cooling film. The light-transmitting fluid carries heat and enters the heat exchange equipment through the fluid outlet. The heat carried by the transparent fluid can come from the non-photovoltaic band heat absorbed during the day and the radiative heat from the transparent photovoltaic panels, thus heating the building's interior. During the day, the light-transmitting fluid enters the fluid channel to form a fluid barrier, blocking the radiative cooling of the radiative cooling film. It can absorb the non-photovoltaic band of sunlight and the radiant heat from transparent photovoltaic panels. The light-transmitting fluid carries the heat and enters the heat exchange equipment through the fluid outlet to heat the interior of the building. If the temperature inside the building is determined to be not lower than a set threshold, it indicates that the temperature inside the building is too high and cooling is required. At night, the light-transmitting fluid in the fluid channel is drained, allowing the radiative cooling film to perform radiative cooling, thereby reducing the temperature inside the building. During the day, the light-transmitting fluid enters the fluid channel to form a fluid barrier, absorbing the non-photovoltaic band of sunlight and the radiant heat from the transparent photovoltaic panels. The light-transmitting fluid carries the heat and enters the liquid storage component through the fluid outlet to exchange heat with the cold fluid, thereby reducing the temperature inside the building and the temperature of the transparent photovoltaic panels. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a structural schematic diagram of the photovoltaic window provided in Embodiment 1;

[0023] Figure 2 This is a schematic diagram of the temperature control system provided in Embodiment 2;

[0024] Figure 3 This is a schematic diagram of the temperature control method provided in Example 3.

[0025] In the diagram: 1-Photovoltaic window; 10-Frame; 11-First transparent panel; 12-Second transparent panel; 13-Radiative cooling film; 14-Transparent photovoltaic panel; 15-Fluid inlet; 16-Fluid outlet; 17-Fluid channel; 2-Building wall; 3-Heat exchange equipment; 4-Electrical equipment; 41-Inverter; 5-Liquid storage component; 51-First pipeline; 52-Second pipeline; 53-Branch pipeline; 6-Control valve assembly; 61-First control valve; 62-Second control valve; 7-Drive component; 8-First monitoring component; 9-Second monitoring component. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] The purpose of this invention is to provide a photovoltaic window and a temperature control system and method based on the photovoltaic window to solve the problems existing in the prior art, and to meet the needs of overall temperature control in buildings, so as to achieve heating and cooling in buildings.

[0028] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] Example 1

[0030] This embodiment provides a photovoltaic window 1, please refer to... Figure 1 The system includes a main body, which comprises a frame 10 and a first transparent plate 11, a second transparent plate 12, a radiation-cooling film 13, and a transparent photovoltaic panel 14, which are sequentially distributed along the thickness direction and connected to the frame 10. A fluid channel 17 is formed between the first transparent plate 11 and the second transparent plate 12 and the frame 10. The main body is provided with a fluid inlet 15 and a fluid outlet 16 that are both connected to the fluid channel 17. The fluid inlet 15 can allow light-transmitting fluid to enter, and the fluid outlet 16 can discharge light-transmitting fluid and can also be connected to a heat exchange device 3. The light-transmitting fluid is used to absorb radiation in the non-photovoltaic band and convert it into heat. The radiation-cooling film 13 is disposed on the inner side of the second transparent plate 12 and is attached to the transparent photovoltaic panel 14. The radiation-cooling film 13 is used to transmit sunlight and can radiate cooling. The transparent photovoltaic panel 14 is used to electrically connect to the electrical device 4 and is used to allow sunlight to pass through and generate electricity.

[0031] Connected to the building wall via frame 10, sunlight can sequentially pass through the first transparent panel 11, the light-transmitting fluid in the fluid channel 17, the second transparent panel 12, the radiative cooling film 13, and the transparent photovoltaic panel 14 to enter the building. The transparent photovoltaic panel 14 generates photovoltaic power to supply electrical equipment. At night, if the building temperature is high, the radiative cooling film 13 can provide radiative cooling, thereby lowering the building temperature. If the building temperature is low, the light-transmitting fluid is introduced into the fluid channel 17 through the fluid inlet 15, forming a fluid barrier within the fluid channel 17. This fluid barrier can block the radiative cooling film 15 from absorbing heat and carrying it through the fluid outlet. The light-transmitting fluid enters the heat exchanger 3 through the fluid inlet 16 to exchange heat inside the building. During the daytime, the light-transmitting fluid is continuously carried away by the non-photovoltaic band heat from the sun and the radiant heat from the transparent photovoltaic panel 14 through the fluid inlet 15 in the fluid channel 17. If the temperature inside the building is low, the light-transmitting fluid enters the heat exchanger 3 through the fluid outlet 16 to exchange heat and raise the temperature inside the building. If the temperature inside the building is high, the light-transmitting fluid flows to the outside through the fluid outlet 16 to exchange heat and continuously carry away heat to cool the inside of the building and the transparent photovoltaic panel 14. Thus, the photovoltaic window 1 provided by this invention can be applied to scenarios where the overall temperature inside the building is controlled to achieve both heating and cooling inside the building.

[0032] In this embodiment, a preferred embodiment is that the first transparent plate 11 and the second transparent plate 12 are made of a transparent polymer, such as highly transparent polyethylene, which exhibits excellent optical transmittance in the 0.2μm to 25μm wavelength range. The light-transmitting fluid is an aqueous solution filled with nanoparticles. Specifically, the light-transmitting fluid is an aqueous solution of Ag@SiO2, wherein the volume fraction of Ag@SiO2 is 0.003%, the diameter of Ag in Ag@SiO2 is 10nm, and the diameter of SiO2 is 5nm. The light-transmitting fluid is a mixture with specific optical and thermal properties formed by adding nanoparticles (such as metal oxides, carbon nanotubes, or graphene) to a base fluid. It possesses selective optical radiation characteristics, capable of absorbing and scattering light of specific wavelengths. By selectively absorbing and scattering radiation within the non-photovoltaic response band, it converts radiation into heat, avoiding waste heat heating the transparent photovoltaic panel 14. It selectively transmits radiation within the photovoltaic response band, and this portion of radiation reaches the surface of the transparent photovoltaic panel 14 and is converted into electrical energy by the photovoltaic panel. By adjusting the type and concentration of nanoparticles, the optical and thermal behavior of the fluid can be precisely controlled to adapt to the needs of different photovoltaic systems. The combination of the first transparent plate 11 and the second transparent plate 12 with the light-transmitting fluid is equivalent to the nanofluid frequency-dividing fluid channel, i.e., the NSS channel, in the art, which effectively divides solar radiation, absorbs radiation in the non-photovoltaic band, and converts it into heat.

[0033] In the optional embodiments of this example, more preferably, the radiation cooling film 13 is used to achieve radiation cooling of the building by exchanging heat with the outside universe through the atmospheric window in the 8μm to 13μm band. Specifically, materials with high transmittance in the solar spectrum and high emissivity in the "atmospheric window" band, such as silica, polymethyl methacrylate, or polydimethylsiloxane, are used. The radiation cooling film 13 can be formed in the form of metamaterials, multilayer composite materials, or randomly doped particles such as silica structures. Alternatively, conventional radiation cooling films 13 made of other materials in the art can be used to achieve efficient transmittance in the solar spectrum and efficient radiation cooling in the 8μm to 13μm "atmospheric window" band, thereby reducing the internal temperature of the building and the surface temperature of the transparent photovoltaic panel 14, and improving the photovoltaic power generation efficiency to a certain extent.

[0034] In this embodiment, the frame 10 is preferably made of metal, such as stainless steel or aluminum alloy, which has high strength and corrosion resistance, ensuring mechanical strength and weather resistance during long-term use. The circumferential frames of the frame 10 can be fixed by welding, such as using high-precision welding technology like argon arc welding, to ensure the firmness and airtightness of the connection. Furthermore, the outer and inner walls of the frame 10 can be bonded with heat-insulating materials, such as aerogel, fiberglass, or rock wool, which have excellent thermal resistance properties and can effectively reduce heat loss through the frame 10. The bonding parts use high-performance industrial-grade adhesives, such as epoxy resin, to ensure long-term stability in harsh environments such as high temperature and high humidity.

[0035] Specifically, the transparent photovoltaic panel 14 uses high-efficiency perovskite solar cells or other common transparent photovoltaic panel materials.

[0036] Example 2

[0037] This embodiment provides a temperature control system; please refer to [link / reference]. Figure 2The system includes a photovoltaic window 1, a liquid storage component 5, a control valve assembly 6, a drive component 7, a first monitoring component 8, and a central control component, as shown in Embodiment 1. The photovoltaic window 1 is installed on the building wall 2. The fluid inlet 15 of the photovoltaic window 1 is connected to a light-transmitting fluid through a first pipe 51, and the fluid outlet 16 is connected to a second pipe 52 to discharge the light-transmitting fluid. A branch pipe 53 for connecting to a heat exchange device 3 is connected to the second pipe 52. The liquid storage component 5 is used to store the light-transmitting fluid and is connected to both the first pipe 51 and the second pipe 52. The control valve assembly 6 is used to control the connection and disconnection between the fluid inlet 15 and the liquid storage component 5, as well as the connection and disconnection between the fluid outlet 16 and the liquid storage component 5 and the heat exchange device 3. The drive component 7 is used to drive the light-transmitting fluid. The first monitoring component 8 is used to monitor the temperature information inside the building. The central control component is communicatively connected to the first monitoring component 8 and is used to receive temperature information. It is also communicatively connected to the control valve assembly 6 and the drive component 7 and is used to control the operation of the control valve assembly 6 and the drive component 7.

[0038] The central control unit can determine whether it is necessary to introduce light-transmitting fluid into the fluid channel 17 based on the building temperature information monitored by the first monitoring unit 8; the supply or circulation of light-transmitting fluid is achieved by setting up a liquid storage unit 5; the flow direction of the light-transmitting fluid is controlled by the control valve assembly 6 and the drive unit 7, which facilitates the automatic regulation of the building temperature; the liquid storage unit 5 can be set as a liquid storage tank.

[0039] In the optional scheme of this embodiment, more preferably, the temperature control system provided in this embodiment also includes a second monitoring component 9 for monitoring solar radiation intensity information; the central control component is communicatively connected to the second monitoring component 9 and is used to receive solar radiation intensity information, and to determine whether it is daytime or nighttime based on the solar radiation intensity information. In daytime mode, the NSS fluid channel is opened, that is, the light-transmitting fluid circulates in the fluid channel 17. The light-transmitting fluid divides the solar radiation, absorbs radiation in the non-photovoltaic band and converts it into heat. In winter, the heat carried away by the light-transmitting fluid can flow to the heat exchange device 3 to heat the building. In summer, the light-transmitting fluid carries the heat out to the outside to avoid overheating indoors. In nighttime mode, the NSS fluid channel can be closed, that is, the light-transmitting fluid in the fluid channel 17 is emptied, the transparent photovoltaic panel 14 stops working, and the radiative cooling film 13 exchanges heat with the outer space through the atmospheric window to achieve passive radiative cooling to cool the building. Alternatively, the NSS fluid channel can be opened to prevent the radiative cooling film 13 from exchanging heat with the outer space through the atmospheric window to lower the room temperature. The heat carried away by the light-transmitting fluid can flow to the heat exchange device 3 to heat the building.

[0040] In an optional embodiment, more preferably, the control valve assembly 6 includes a first control valve 61 and a second control valve 62 that are communicatively connected to the central control component. The first control valve 61 is disposed on the first pipeline 51 and is used to control the connection and disconnection between the first pipeline 51 and the liquid storage component 5. The second control valve 62 is disposed at the fluid outlet 16 and is connected to the second pipeline 52 and the branch pipeline 53. The second control valve 62 is used to control the connection between the fluid outlet 16 and the second pipeline 52 or the branch pipeline 53. Specifically, the first control valve 61 is configured as an electrically controlled two-way valve, the second control valve 62 is configured as an electrically controlled three-way valve, and the circulation inlet of the heat exchange device 3 is connected to the second control valve 63 through a branch pipeline 53, and the circulation outlet of the heat exchange device 3 is connected to the second pipeline 52 through another branch pipeline 53, so that the fluid passing through the heat exchange device 3 can circulate to the liquid storage component 5.

[0041] In a preferred embodiment, the temperature control system provided in this embodiment further includes an inverter 41 electrically connected to the transparent photovoltaic panel 14. The inverter 41 is also electrically connected to the electrical device 4. The inverter 41 receives and stores the electrical energy of the transparent photovoltaic panel 14 and can provide the electrical energy required by the electrical device 4. The inverter 41 integrates a battery for storing and managing electrical energy. The inverter 41 converts the DC power output from the transparent photovoltaic panel 14 into AC power and connects it to the electrical device 4 through a DC-AC interface. This design ensures that the solar energy collected by the photovoltaic window 1 during the day can be converted and stored, and supplied to the electrical device 4 when needed, thus improving the overall energy efficiency and reliability of the system. The process of transmitting the power generated by the transparent photovoltaic panel 14 to the electrical device 4 through the inverter 41 is a conventional solution in the art and will not be described in detail here.

[0042] In the optional embodiments of this example, more preferably, the driving component 7 is configured as a fluid pump and is disposed on the first pipeline 51; specifically, the driving component 7 is configured as a bidirectional fluid pump, which can introduce light-transmitting fluid from the fluid inlet 15 into the fluid channel 17 or extract light-transmitting fluid from the fluid inlet 15 into the fluid channel 17.

[0043] In the optional scheme of this embodiment, more preferably, the first monitoring component 8 is set as a temperature sensor and is set inside the building, i.e., indoors, and the second monitoring component 9 is set as a solar radiation sensor and is set outside the building, i.e., outdoors; the central control component is set as an electrical control cabinet and can be set indoors.

[0044] Example 3

[0045] This embodiment provides a temperature control method based on the temperature control system in Embodiment 2, including:

[0046] The central control unit receives temperature information monitored by the first monitoring unit 8, and compares the temperature information monitored by the first monitoring unit 8 with the set threshold.

[0047] If the building's internal temperature is lower than the set threshold, it indicates that the building's internal temperature is low and heating is required. The system controls the continuous flow of translucent fluid into the fluid channel 17 and into the heat exchanger 3, i.e., the NSS channel is opened. The central control unit controls the fluid inlet 15 to connect to the liquid storage component 5 and the fluid outlet 16 to connect to the heat exchanger 3 via the control valve assembly 6. Then, the drive component 7 causes the translucent fluid to enter the fluid channel 17, forming a fluid barrier that blocks the radiative cooling of the radiative cooling film 13. The translucent fluid can absorb the radiative heat from non-photovoltaic band sunlight or the transparent photovoltaic panel 14. The translucent fluid carries the heat through the fluid outlet 16 into the heat exchanger 3 to heat and raise the building's internal temperature.

[0048] If the building's internal temperature is determined to be not less than a set threshold, it indicates that the building's internal temperature is high and cooling is required. The system controls the continuous flow of light-transmitting fluid into the fluid channel 17 and into the liquid storage component 5, i.e., the NSS channel is opened. The central control unit can control the control valve assembly 6 to connect the fluid inlet 15 to the liquid storage component 5 and the fluid outlet 16 to the liquid storage component 5. Then, the drive component 7 allows the light-transmitting fluid to enter the fluid channel 17, forming a fluid barrier to absorb heat from non-photovoltaic wavelengths of sunlight or radiant heat from the transparent photovoltaic panel 14. The light-transmitting fluid carries heat through the fluid outlet 16 into the liquid storage component 5 to exchange heat with the cold fluid. Alternatively, the light-transmitting fluid in the fluid channel 17 can be emptied, i.e., the NSS channel is closed. The central control unit can empty the light-transmitting fluid in the fluid channel 17 through the drive component 7 and the control valve assembly 6, allowing the radiative cooling film 13 to perform radiative cooling, thereby reducing the building's internal temperature and the temperature of the transparent photovoltaic panel 14.

[0049] The NSS channel is closed, but it can be opened by controlling the first control valve 61, and then the drive component 7 can be controlled to draw the light-transmitting fluid in the fluid channel 17 back to the liquid storage component 5.

[0050] Specifically, the set threshold can be a range such as 20-26 degrees Celsius. When the indoor temperature is below 20 degrees Celsius, the NSS channel is opened, the radiative cooling film 13 stops radiative cooling, and the room is heated. When the indoor temperature is above 26 degrees Celsius, the NSS channel is closed, the radiative cooling film 13 stops radiative cooling, and the room is cooled. Alternatively, the NSS channel is opened, the radiative cooling film 13 stops radiative cooling, and the fluid carries the heat to the outside.

[0051] Among the optional solutions provided in this embodiment, the more preferred option is described in the following example. Figure 3The central control unit is set to complete a cycle every set time interval t. The central control unit has a built-in time module, such as a timer, and controls the start of the next cycle according to the time module. The time interval t can be determined according to the requirements. At the beginning of a cycle, the central control unit compares the solar radiation intensity G with a set first threshold. The first threshold is set to G=0. By judging the solar radiation intensity, the central control unit first determines whether it is day or night, and then judges the temperature information inside the building.

[0052] If the solar radiation intensity G is greater than the set first threshold, the central control unit enters the daytime control mode. In the daytime control mode, the NSS channel is opened, that is, the central control unit controls the control valve assembly 6 to connect the fluid inlet 15 with the liquid storage component 5, and the central control unit controls the drive component 7 to drive the light-transmitting fluid to continuously enter the fluid channel 17 through the fluid inlet 15 to fill the fluid channel 17. If the indoor temperature T is less than the set second threshold, it indicates that the indoor temperature is low. The central control unit controls the control valve assembly 6 to connect the fluid outlet 16 with the heat exchange device 3 to heat the indoor environment. If the indoor temperature T is not less than the set second threshold, it indicates that the indoor temperature is high, usually in summer. The central control unit controls the control valve assembly 6 to connect the fluid outlet 16 with the liquid storage component 5 to carry the heat to the outside for heat exchange with the cold fluid. The second threshold is set to T = 20℃.

[0053] If the solar radiation intensity G is not greater than the set first threshold, the central control unit enters the night control mode. In the night control mode, if the indoor temperature T is less than the set third threshold, it indicates that the indoor temperature is low, usually in winter. The NSS channel is opened, that is, the central control unit controls the control valve assembly 6 to connect the fluid inlet 15 with the liquid storage component 5 and the fluid outlet 16 with the heat exchange device 3. The central control unit controls the drive component 7 to drive the light-transmitting fluid to continuously enter the fluid channel 17 through the fluid inlet 15 to fill the fluid channel 17, and then allows the light-transmitting fluid to enter the heat exchange device 3 through the fluid outlet 16, thus stimulating the indoor temperature. Heating can be performed, or only the fluid channel 17 can be filled with light-transmitting fluid to prevent the radiative cooling film 13 from exchanging heat with outer space through the atmospheric window; if the indoor temperature T is not less than the set third threshold, it indicates that the indoor temperature is high. The central control component controls the control valve assembly 6 to connect the fluid inlet 15 with the liquid storage component 5. The central control component controls the drive component 7 to drive the light-transmitting fluid to flow back to the liquid storage component 5 through the fluid inlet 15 to empty the fluid channel 17, so that the radiative cooling film 13 can perform radiative cooling, thereby reducing the indoor temperature and the temperature of the transparent photovoltaic panel 14; wherein the second threshold is set to T = 26℃.

[0054] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A temperature control system, characterized in that: include: A photovoltaic window (1) is installed on a building wall (2). The photovoltaic window (1) includes a body, which includes a frame (10) and a first transparent plate (11), a second transparent plate (12), a radiation cooling film (13), and a transparent photovoltaic panel (14) that are sequentially distributed along the thickness direction and connected to the frame (10). The first transparent plate (11) and the second transparent plate (12) form a fluid channel (17) with the frame (10). The body is provided with a fluid inlet (15) and a fluid outlet (16) that are both connected to the fluid channel (17). The fluid inlet (15) can allow light-transmitting fluid to pass through, and the fluid outlet (16) can discharge the light-transmitting fluid and can also be connected to a heat exchange device (3). The light-transmitting fluid is used to absorb radiation in the non-photovoltaic band and convert it into heat; the radiation-cooling film (13) is disposed on the inner side of the second transparent plate (12), and the radiation-cooling film (13) is attached to the transparent photovoltaic plate (14). The radiation-cooling film (13) is used to transmit visible light and can radiate cooling; the transparent photovoltaic plate (14) is used to be electrically connected to the electrical equipment (4). The transparent photovoltaic plate (14) can transmit visible light and can generate electricity; the fluid inlet (15) is introduced into the light-transmitting fluid through the first pipe (51), and the fluid outlet (16) is discharged from the light-transmitting fluid through the second pipe (52). The second pipe (52) is connected to a branch pipe (53) for connecting the heat exchange equipment (3). The liquid storage component (5) is used to store the light-transmitting fluid and is connected to both the first pipeline (51) and the second pipeline (52); Control valve assembly (6) is used to control the opening and closing of the fluid inlet (15) and the liquid storage component (5) and the opening and closing of the fluid outlet (16) and the liquid storage component (5) and the heat exchange device (3); A driving component (7) is used to drive the light-transmitting fluid; The first monitoring component (8) is used to monitor temperature information inside the building; and The central control unit is communicatively connected to the first monitoring unit (8) and used to receive the temperature information. It is also communicatively connected to the control valve assembly (6) and the drive unit (7) and used to control the operation of the control valve assembly (6) and the drive unit (7).

2. The temperature control system according to claim 1, characterized in that: It also includes a second monitoring component (9) for monitoring solar radiation intensity information; the central control component is communicatively connected to the second monitoring component (9) and is used to receive the solar radiation intensity information.

3. The temperature control system according to claim 1, characterized in that: The control valve assembly (6) includes a first control valve (61) and a second control valve (62) that are communicatively connected to the central control component. The first control valve (61) is disposed on the first pipeline (51) and is used to control the connection and disconnection between the first pipeline (51) and the liquid storage component (5). The second control valve (62) is disposed at the fluid outlet (16) and is connected to the second pipeline (52) and the branch pipeline (53). The second control valve (62) is used to control the connection between the fluid outlet (16) and the second pipeline (52) or the branch pipeline (53).

4. The temperature control system according to claim 1, characterized in that: It also includes an inverter (41) electrically connected to the transparent photovoltaic panel (14), the inverter (41) is also used to be electrically connected to the electrical equipment (4), the inverter (41) is used to receive and store the electrical energy of the transparent photovoltaic panel (14), and can provide the electrical energy required by the electrical equipment (4).

5. The temperature control system according to claim 1, characterized in that: The drive component (7) is configured as a fluid pump and is installed on the first pipeline (51).

6. The temperature control system according to claim 1, characterized in that: The first transparent plate (11) and the second transparent plate (12) are made of transparent polymer; the light-transmitting fluid is a water-based solution filled with nanoparticles.

7. The temperature control system according to claim 1, characterized in that: The radiation cooling film (13) is used for radiation heat exchange with the outside world through an atmospheric window in the 8μm~13μm band range.

8. A temperature control method, characterized in that: The temperature control system according to any one of claims 1-7 includes: The central control unit receives the temperature information monitored by the first monitoring unit (8), and the central control unit compares the temperature inside the building with the set threshold based on the temperature information; If the temperature inside the building is less than the set threshold, the light-transmitting fluid is controlled to continuously enter the fluid channel (17) and be able to enter the heat exchange equipment (3). If the temperature inside the building is not lower than the set threshold, the light-transmitting fluid is controlled to continuously enter the fluid channel (17) and be able to enter the liquid storage component (5); or, the light-transmitting fluid in the fluid channel (17) is drained.

9. The temperature control method according to claim 8, characterized in that: Also includes: The temperature control system includes a second monitoring component (9) that is communicatively connected to the central control component. The second monitoring component (9) is used to monitor solar radiation intensity information and send it to the central control component. The central control unit compares the solar radiation intensity with a set first threshold based on the solar radiation intensity information. If the solar radiation intensity is greater than the set first threshold, the central control component controls the control valve assembly (6) to connect the fluid inlet (15) with the liquid storage component (5), and the central control component controls the drive component (7) to drive the light-transmitting fluid to continuously enter the fluid channel (17) through the fluid inlet (15); if the temperature inside the building is less than the set second threshold, the central control component controls the control valve assembly (6) to connect the fluid outlet (16) with the heat exchange device (3); if the temperature inside the building is not less than the set second threshold, the central control component controls the control valve assembly (6) to connect the fluid outlet (16) with the liquid storage component (5); If the solar radiation intensity is not greater than the set first threshold and if the temperature inside the building is less than the set third threshold, the central control unit controls the control valve assembly (6) to connect the fluid inlet (15) with the liquid storage component (5) and the fluid outlet (16) with the heat exchange device (3). The central control unit controls the drive component (7) to drive the light-transmitting fluid to continuously enter the fluid channel (17) through the fluid inlet (15) and to enter the heat exchange device (3) through the fluid outlet (16). If the temperature inside the building is not less than the set third threshold, the central control unit controls the control valve assembly (6) to connect the fluid inlet (15) with the liquid storage component (5). The central control unit controls the drive component (7) to drive the light-transmitting fluid to flow back to the liquid storage component (5) through the fluid inlet (15) to empty the fluid channel (17).

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