Energy-saving vehicle window projection system based on self-powered sensing and radiation refrigeration

Abstract

The utility model relates to the technical field of energy conservation, and provides an energy-saving car window projection system based on self-powered sensing and radiation refrigeration, which comprises a self-powered sensing device and a projection device used for projecting light rays to radiation refrigeration glass, and the projection device is provided with a power supply trigger interface and a projection lens. The power trigger interface is connected to the self-powered sensing device, and the projection lens faces the radiation refrigeration glass. The energy-saving car window projection system based on self-powered sensing and radiation refrigeration provided by the utility model can be favorable for realizing self power supply of the self-powered sensing device, saves energy consumption of temperature regulation and control through radiation refrigeration, and saves energy.

Description

Technical Field

[0001] This utility model belongs to the field of energy-saving technology, and in particular relates to an energy-saving vehicle window projection system based on self-powered sensing and radiative cooling. Background Technology

[0002] With the continuous growth of global energy demand and the rapid development of technology, data has become a core element driving social progress and optimizing resource allocation. Against this backdrop, intelligent sensors, as front-end devices for data acquisition, can provide accurate and massive amounts of data support for intelligent systems. However, the continuous standby time of sensors consumes a significant amount of energy; therefore, there is an urgent need for self-powered sensors to reduce energy dependence and extend their service life.

[0003] Smart windows are an innovative technology in the automotive industry, aiming to enhance window functionality and user experience by integrating advanced electronics, materials, and sensing technologies. Beyond the basic functions of traditional windows—light transmission and ventilation—smart windows can automatically adjust their characteristics based on environmental conditions and user needs. For example, they can adjust the window's light transmittance and heat radiation transmittance according to external light intensity, and project images as requested by the user. The main principles of smart windows are electrochromic and thermochromic properties. By changing the window's color, they reduce the cooling capacity of air conditioning in summer and the heat loss from the vehicle interior in winter, showing broad application prospects for reducing automotive energy consumption. Smart windows can significantly improve in-car comfort while reducing energy consumption, making them an important direction for future automotive development. Currently, the projection function of smart windows requires an internal power supply from the vehicle, wasting energy and hindering energy conservation. Utility Model Content

[0004] The purpose of this invention is to overcome at least one of the shortcomings of the prior art and to provide an energy-saving vehicle window projection system based on self-powered sensing and radiative cooling, which has excellent energy-saving effect.

[0005] The technical solution of this utility model is: an energy-saving vehicle window projection system based on self-powered sensing and radiative cooling, including a self-powered sensing device and a projection device for projecting light onto radiative cooling glass. The projection device has a power trigger interface and a projection lens. The power trigger interface is connected to the self-powered sensing device, and the projection lens is oriented towards the radiative cooling glass.

[0006] Optionally, the self-powered sensing device includes at least one of a thermoelectric sensor, a piezoelectric sensor, and a photoelectric sensor.

[0007] Optionally, the self-powered sensing device includes a thermoelectric sensor, which includes a thermoelectric foam and electrodes disposed on the thermoelectric foam.

[0008] Optionally, the energy-saving vehicle window projection system includes a radiation-cooled glass, which includes a bottom FTO layer, a middle spacer layer, and a top adjustment layer.

[0009] Optionally, the thickness of the FTO layer is 280 nm.

[0010] Optionally, the spacer layer is a SiO2 microsphere porous structure film with a thickness of 400 nm.

[0011] Optionally, the adjustment layer is a VO2 thin film layer with a thickness of 45 nm.

[0012] Optionally, multiple thermoelectric foams are bonded to a metal layer using conductive materials, and the metal layer is connected to a wireless transmitting device. The projection device is connected to a wireless receiving device to receive signals emitted by the wireless transmitting device.

[0013] Optionally, the wireless transmitting device is a Bluetooth transmitter, and the wireless receiving device is a Bluetooth receiver.

[0014] Specifically, it also includes an in-vehicle host and an in-vehicle power supply. The projection device is electrically connected to the in-vehicle host and the in-vehicle power supply, and the projection device is activated by the self-powered sensing device.

[0015] The present invention provides an energy-saving vehicle window projection system based on self-powered sensing and radiative cooling, which facilitates the self-powered sensing device to trigger power supply to the projection device, and saves energy consumption for temperature control through radiative cooling, thus saving energy. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of an energy-saving vehicle window projection system based on self-powered sensing and radiative cooling, provided by an embodiment of this utility model.

[0018] Figure 2 This is a SEM image of the SiO2 thin film provided in this embodiment of the present invention;

[0019] Figure 3 The W provided in this embodiment of the utility model x V 1-x XRD diffraction pattern of O2 thin film;

[0020] Figure 4 This is a SEM image of the cross-section of the three-layer thin film structure of the radiation-cooled glass provided in this embodiment of the present invention;

[0021] Figure 5 This is a phase characterization diagram of thermoelectric foam provided in an embodiment of this utility model. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0023] It should be noted that the terms "setup" and "connection" should be interpreted broadly. For example, they can refer to direct setup or connection, or indirect setup or connection through centered components or centered structures.

[0024] Furthermore, in embodiments of this utility model, terms such as "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" are used to indicate orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, or in a conventional placement or usage state. These terms are merely for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the structure, feature, device, or element referred to must have a specific orientation or positional relationship, nor that it must be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In the description of this utility model, unless otherwise stated, "multiple" means two or more.

[0025] The various specific technical features and embodiments described in the detailed embodiments can be combined in any suitable manner without contradiction. For example, different implementation methods can be formed by combining different specific technical features / embodiments. In order to avoid unnecessary repetition, the various possible combinations of the various specific technical features / embodiments in this utility model will not be described separately.

[0026] like Figure 1As shown in the figure, this utility model provides an energy-saving vehicle window projection system based on self-powered sensing and radiative cooling. It includes a self-powered sensing device 100 and a projection device 200 for projecting light onto a radiatively cooled glass 300. The projection device 200 has a power trigger interface and a projection lens. The power trigger interface is connected to the self-powered sensing device 100, which triggers the projection device 200 to operate. The projection lens faces the radiatively cooled glass 300. The integration of the self-powered sensing device 100 and the radiatively cooled glass 300 facilitates self-powering of the self-powered sensing device 100 and saves energy consumption for temperature control through radiative cooling. The self-powered sensing device 100 can be triggered using its own electrical energy.

[0027] Specifically, the self-powered sensing device 100 includes at least one of a thermoelectric sensor, a piezoelectric sensor, and a photoelectric sensor.

[0028] In this embodiment, the self-powered sensing device 100 includes a thermoelectric sensor, which includes a thermoelectric foam and an electrode disposed on the thermoelectric foam. The electrode can be connected to the power trigger interface (power supply interface) of the projection device 200, or it can be connected to the energy storage device (rechargeable battery or capacitor, etc.) alone or simultaneously.

[0029] Specifically, the energy-saving vehicle window projection system includes a radiation-cooling glass 300, which includes a bottom FTO layer, a middle spacer layer, and a top adjustment layer.

[0030] Specifically, the thickness of the FTO layer is 280 nm.

[0031] Specifically, the spacer layer is a SiO2 microsphere porous structure film with a thickness of 400 nm.

[0032] Specifically, the adjustment layer may be a VO2 thin film layer doped with 1.5% W atomic ratio, and the thickness of the VO2 thin film layer is 45 nm.

[0033] Specifically, multiple thermoelectric foams are bonded to a metal layer (0.1mm copper foil) using a conductive material. The metal layer is connected to a wireless transmitter. The projection device 200 is connected to a wireless receiver to receive signals (trigger signals) emitted by the wireless transmitter, which can project the content onto the radiation-cooled glass 300. The conductive material can be silver paste.

[0034] Specifically, the wireless transmitting device is a Bluetooth transmitter, and the wireless receiving device is a Bluetooth receiver. The Bluetooth transmitter and Bluetooth receiver together constitute Bluetooth device 400. The self-powered sensing device 100 can also be electrically connected to Bluetooth device 400.

[0035] In practical applications, the following steps can be referenced for the fabrication of thermoelectric foam:

[0036] 1. Degreasing: Soak the melamine sponge (Basotect; BASF) in an 80g / L NaOH solution.

[0037] Leave for 30 minutes, then rinse with deionized water and dry.

[0038] 2. Electroless Silver Plating: Melamine foam itself is insulating, so it first needs to be conductively treated to make it an electrode suitable for electrodeposition. Conductivity treatment makes the foam substrate conductive so that a layer of metal can be plated onto its surface. Methods for conductivity treatment include thermal evaporation, ion plating, sputtering, electroless plating, coating with conductive adhesive, coating with conductive resin, and coating with metal powder. Electroless plating is used to deposit glucose monohydrate (C6H4O3). 12 A reducing agent was prepared by dissolving glucose, sodium potassium tartrate tetrahydrate (C4H4O6KNa·4H2O), polyethylene glycol (PEG1000), and ethanol in deionized water. The concentrations of glucose, sodium potassium tartrate, polyethylene glycol, and ethanol were 40 g / L, 14 g / L, 0.1 g / L, and 100 g / L, respectively. The silver ammonia solution was prepared by mixing silver nitrate (AgNO3), sodium hydroxide (NaOH), and ammonia. Equal volumes of the reducing agent and silver ammonia solution were mixed. A melamine template was then immersed in the mixture and gently squeezed to remove residual air bubbles from the foam. The concentration of silver nitrate solution was fixed at 50 g / L, and the concentration of NaOH was fixed at 25 g / L.

[0039] 3. Selenization: A selenium solution was prepared by dissolving sodium sulfide nonahydrate (Na₂S·9H₂O) and selenium powder (Se) in deionized water, with concentrations of 60 g / L and 20 g / L, respectively. The aforementioned silver network was then immersed in the selenium solution for 10 h to synthesize an Ag₂Se network. Phase characterization of the thermoelectric foam can be found in [reference needed]. Figure 5 As shown.

[0040] The following steps can be used as a reference for the fabrication of radiation-cooling glass 300:

[0041] Preparation process: The sample consists of a three-layer thin film structure. The bottom layer is 280nm FTO, the middle spacer layer is 400nm SiO2 microsphere porous structure film, and the top layer is VO2 film doped with 1.5% W atomic ratio and has a thickness of 45nm.

[0042] FTO and W x V 1-x O2 thin film (XRD diffraction pattern as shown) Figure 3The SiO2 sol (shown) was prepared by magnetron sputtering, while the SiO2 sol was obtained by spin-coating SiO2 sol at a certain rotation speed. The SiO2 sol was prepared using a chemical synthesis method: First, 6.25 ml of TEOS (tetraethyl orthosilicate) was dripped into 25 ml of anhydrous ethanol and mixed for 10 min to obtain mixture 1. Then, 0.8 ml of ammonia and 1.25 ml of deionized water were sequentially dripped into 18.25 ml of anhydrous ethanol and magnetically stirred for 10 min to obtain mixture 2. The two mixtures were then mixed and stirred for 10 min to ensure thorough mixing, resulting in mixture 3. Finally, mixture 3 was placed in a constant temperature incubator at 70°C for 9.5 h to obtain the desired milky-white, stable SiO2 sol. The sol was dropped onto FTO glass, and a spin coater was set to 1500 rpm for 20 seconds to obtain a SiO2 wet film. This film was then dried in a 70℃ oven for 2 hours to obtain a uniform 400 nm SiO2 microsphere film with a microsphere diameter of approximately 50 nm. The SEM image of the film is shown below. Figure 2 and 4 As shown in the table below:

[0043] <![CDATA[ε Hot ]]> <![CDATA[ε Cold ]]> <![CDATA[Δε LWIR ]]> 300nm 0.71 0.23 0.48 400nm 0.76 0.28 0.48 1100nm 0.93 0.54 0.39 2100nm 0.82 0.66 0.16

[0044] ε Hot Emissivity at high temperatures, ε Cold Emissivity at low temperatures, Δε LWIR To enhance emissivity modulation capabilities, a thermoelectric foam sensor and a radiation-cooled glass are introduced. This enables the sensor to be self-powered, and radiation cooling saves energy consumption for temperature control, thus conserving energy. In specific applications, the thermoelectric foam's main structure is Ag₂Se, and the main thermoelectric material is Ag₂Se. The radiation-cooled glass's main radiation-cooling material is vanadium dioxide, with a deposition thickness of 2 mm.

[0045] The above manufacturing method is for reference only. In practical applications, the corresponding sensors and radiation-cooled glass can also be purchased directly.

[0046] The energy-saving vehicle window projection system of this utility model is applied to a vehicle and includes an on-board host, an on-board power supply, and a projection device 200. The vehicle window is made of radiation-cooled glass 300.

[0047] The projection device 200 is connected to the vehicle-mounted host and the vehicle power supply. The projection device 200 is positioned opposite at least a portion of the surface of the vehicle's dashboard. The projection device 200 can be fixed to a suitable location such as the dashboard, and its lens can be directed towards the vehicle window (i.e., the radiant cooling glass 300). The projection device 200 projects an image onto at least a portion of the surface of the vehicle window upon electrical triggering by the vehicle-mounted host. The projection device 200 is powered by the vehicle power supply and is activated by the self-powered sensor.

[0048] The self-powered sensing device 100 (sensor) is a thermoelectric foam sensor, electrically connected to the vehicle-mounted host. The self-powered sensing device 100 can be positioned lower in the longitudinal direction than the projection device 200. As a sensor, the self-powered sensing device 100 captures the position information of a human finger and feeds it back to the vehicle-mounted host in the form of an electrical signal. The vehicle power supply can be used to power the projection device, the sensor, and the Bluetooth device 400 (Bluetooth transmitter and receiver). A radiant cooling glass window connected to the vehicle body is used to receive the projected image.

[0049] The projection device 200, the Bluetooth transmitter, and the sensor are all fixed to the vehicle's dashboard using screws or snap-fit ​​connections; alternatively, the projection device 200 can be fixed to the vehicle's dome light using screws or snap-fit ​​connections, while the Bluetooth transmitter and the sensor can be mounted on the vehicle's secondary dashboard using screws or snap-fit ​​connections. The projection device 200 projects images onto the surface of the radiative cooling glass (window) 300, displaying the projected image in a specific area on the surface of the radiative cooling glass 300. The projection device 200's virtual keyboard projection is triggered by the self-powered sensing device 100 (thermoelectric foam sensor). That is, when the user selects to touch the thermoelectric foam sensor, the thermoelectric foam sensor simultaneously receives pressure and heat signals, transmits the signals to the Bluetooth transmitter, and sends an electrical trigger signal, causing the projection device 200 to start operating and project the image, displaying the image in a specific area of ​​the radiative cooling glass 300.

[0050] In order to ensure that the size of the projected image on the surface of the radiative cooling glass 200 is not distorted, the distance between the projection device 200 and the radiative cooling glass 300 needs to be set reasonably so that the aspect ratio of the projected image is within a reasonable range.

[0051] In this embodiment, the bottom of the projection device 200 is circular and is first fixed to the base by snap-fit. The base is generally installed on the dashboard by screws. The vertical height of the sensor and the Bluetooth transmitter is generally lower than that of the projection device. Alternatively, the bottom of the projection device is circular and is first fixed to the base by snap-fit. The base is generally installed on the dome light by screws. The sensor and the Bluetooth transmitter are respectively installed on the sub-dashboard by screws.

[0052] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions or improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An energy-saving vehicle window projection system based on self-powered sensing and radiative cooling, characterized in that, The device includes a self-powered sensing device and a projection device for projecting light onto a radiation-cooled glass. The projection device has a power trigger interface and a projection lens. The power trigger interface is connected to the self-powered sensing device, and the projection lens is oriented towards the radiation-cooled glass.

2. The energy-saving vehicle window projection system as described in claim 1, characterized in that, The self-powered sensing device includes at least one of thermoelectric sensors, piezoelectric sensors, and photoelectric sensors.

3. The energy-saving vehicle window projection system as described in claim 1, characterized in that, The self-powered sensing device includes a thermoelectric sensor, which includes a thermoelectric foam and electrodes disposed on the thermoelectric foam.

4. The energy-saving vehicle window projection system as described in claim 1, characterized in that, The energy-saving vehicle window projection system includes a radiation-cooled glass, which comprises a bottom FTO layer, a middle spacer layer, and a top adjustment layer.

5. The energy-saving vehicle window projection system as described in claim 4, characterized in that, The thickness of the FTO layer is 280 nm.

6. The energy-saving vehicle window projection system as described in claim 4, characterized in that, The spacer layer is a SiO2 microsphere porous structure film with a thickness of 400 nm.

7. The energy-saving vehicle window projection system as described in claim 4, characterized in that, The adjustment layer is a VO2 thin film layer with a thickness of 45 nm.

8. The energy-saving vehicle window projection system as described in claim 2, characterized in that, Multiple thermoelectric foams are bonded to a metal layer using conductive materials. The metal layer is connected to a wireless transmitter. The projection device is connected to a wireless receiver to receive signals emitted by the wireless transmitter.

9. The energy-saving vehicle window projection system as described in claim 8, characterized in that, The wireless transmitting device is a Bluetooth transmitter, and the wireless receiving device is a Bluetooth receiver.

10. The energy-saving vehicle window projection system as described in claim 1, characterized in that, It also includes an in-vehicle host and an in-vehicle power supply, with the projection device connected to the in-vehicle host and the in-vehicle power supply.

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