Outdoor sunshade device and control method thereof

Abstract

The present application relates to the technical field of building sunshade, solve the problem that the sunshade component in the prior art blocks the direct sunlight, and the sunshade component itself is heated by the sunlight and causes secondary heat radiation to the indoor, resulting in poor sunshade effect of the sunshade component on the indoor, and provide an outdoor sunshade equipment and a control method thereof. The method comprises the following steps: obtaining the current time of the geographic location where the sunshade surface to be shaded is located; if the current time is within the preset cooling time period, obtaining the first heat radiation intensity value received by the evaporative plate; if the first heat radiation intensity value is greater than the first preset heat radiation intensity value, obtaining the first moisture content of the evaporative plate; and controlling the water supplementing component to supplement water to the evaporative plate according to the first moisture content. Since water absorbs heat when evaporating, the heat of the outdoor sunshade equipment itself can be removed, the secondary heat radiation of the outdoor sunshade equipment to the indoor is avoided, and the sunshade effect of the outdoor sunshade equipment on the indoor is improved.

Description

Technical Field

[0001] This invention relates to the field of building shading technology, and in particular to an outdoor shading device and its control method. Background Technology

[0002] Currently, the building envelope is prone to heat-induced increases in indoor temperature, leading to increased air conditioning energy consumption. Transparent building envelopes, in particular, are weak points in insulation, characterized by a high heat transfer coefficient (generally greater than 1.0 W / m²). 2 / K), low thermal inertia and transparent (direct light passes through, scattered light passes through) or translucent (only scattered light passes through).

[0003] In existing technologies, the solar radiation entering the room during the cooling season can be reduced by installing shading components on the outside of the transparent enclosure structure, thereby reducing energy consumption. Existing shading components mainly include metal louvers, wooden shading panels, terracotta shading components, polymer composite materials (such as PVC / PMMA), and fabric shading curtains.

[0004] However, while current sunshade components block direct sunlight, they themselves generate secondary heat radiation into the room after being heated by sunlight, resulting in poor cooling effect of the sunshade components. Summary of the Invention

[0005] In view of this, embodiments of the present invention provide an outdoor sunshade device and its control method to solve the problem in the prior art that while the sunshade component blocks direct sunlight, it also generates secondary heat radiation into the room after being heated by sunlight, resulting in poor cooling effect of the sunshade component.

[0006] In a first aspect, the present invention provides a control method for an outdoor sunshade device. The outdoor sunshade device is used to shade a surface to be shaded. The outdoor sunshade device includes an evaporation component and a water replenishment component. The evaporation component includes an evaporation plate made of a rigid porous material. The water replenishment component is used to replenish water to the evaporation plate, allowing the water to permeate and evaporate within the evaporation plate. The method includes:

[0007] Get the current time of the geographical location of the area to be shaded;

[0008] If the current time is within the preset cooling period, then obtain the first thermal radiation intensity value received by the evaporator plate;

[0009] If the first thermal radiation intensity value is greater than the first preset thermal radiation intensity value, then the first moisture content of the evaporation plate is obtained;

[0010] Based on the first moisture content, the water supply component is controlled to supply water to the evaporator plate.

[0011] Secondly, the present invention provides an outdoor sunshade device for shading a surface to be shaded. The outdoor sunshade device includes an evaporation component and a water replenishment component. The evaporation component includes an evaporation plate. The evaporation plate is made of a rigid porous material. The water replenishment component is used to replenish water to the evaporation plate, allowing the water to permeate and evaporate in the evaporation plate. The outdoor sunshade device is used to perform the steps of the control method of the outdoor sunshade device according to any one of claims 1-9.

[0012] In summary, the beneficial effects of the present invention are as follows:

[0013] The outdoor sunshade device and its control method provided in this invention obtain the current time of the geographical location of the surface to be shaded; if the current time is within a preset cooling time period, a first thermal radiation intensity value received by the evaporator plate is obtained; if the first thermal radiation intensity value is greater than a first preset thermal radiation intensity value, a first moisture content of the evaporator plate is obtained; based on the first moisture content, a water replenishment component is controlled to replenish water to the evaporator plate. When the thermal radiation received by the outer surface of the evaporator plate increases, the evaporation efficiency also increases. Since water absorbs heat during evaporation, it can carry away the heat of the outdoor sunshade device itself to cool the sunshade components, avoiding secondary thermal radiation or even radiative cooling effects on the indoor environment, further improving the sunshade effect of the outdoor sunshade device on the indoor environment. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments of the present invention will be briefly introduced below. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, and these are all within the protection scope of the present invention.

[0015] Figure 1 This is a schematic diagram of the structure of the outdoor sunshade device provided in an embodiment of the present invention. Figure 1 ;

[0016] Figure 2 This is a schematic diagram of the structure of the outdoor sunshade device provided in an embodiment of the present invention. Figure 2 ;

[0017] Figure 3 This is a schematic diagram of the structure of the outdoor sunshade device provided in an embodiment of the present invention. Figure 3 ;

[0018] Figure 4 This is a schematic diagram of the structure of the outdoor sunshade device provided in an embodiment of the present invention. Figure 4 ;

[0019] Figure 5 This is a flowchart illustrating the outdoor sunshade device control method provided in this embodiment of the invention. Figure 1 ;

[0020] Figure 6 This is a schematic diagram of water absorption characteristics provided in an embodiment of the present invention;

[0021] Figure 7 This is a flowchart illustrating the outdoor sunshade device control method provided in this embodiment of the invention. Figure 2 .

[0022] The components and their numbers shown in the picture:

[0023] Evaporation component 100, evaporation plate 110, first connecting part 112, second connecting part 113, top plate 120, reserved groove 122, bottom plate 130, second snap-fit ​​groove 131, water replenishment component 200, water tank 210, guide pipe 220, drip irrigation port 221, water stop valve 230, control component 300, time sensor 310, solar radiation sensor 320, moisture detector 330. Detailed Implementation

[0024] The features and exemplary embodiments of various aspects of the present invention will now be described in detail. To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention 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 only configured to explain the present invention and are not configured to limit the present invention. For those skilled in the art, the present invention can be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the invention.

[0025] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0026] It should be noted that all actions involving the acquisition of signals, information, or data in this invention are carried out in compliance with the relevant data protection laws and regulations of the locality and with authorization from the owner of the relevant device.

[0027] In existing technologies, cooling of the interior can be achieved by installing shading components on the outside of a transparent building envelope, thereby reducing energy consumption. Existing shading components mainly include metal louvers, wooden shading panels, terracotta shading components, polymer composite materials (such as PVC / PMMA), and fabric shading curtains. Evaporative cooling products can also be used to cool the outside of the building envelope.

[0028] However, the existing technology has the following technical problems:

[0029] Regarding sunshade products:

[0030] 1. The above types of building shading, while blocking direct sunlight, do not respond to secondary radiation after their own heating up. For example, the surface temperature of a certain metal sunshade can reach 60-80℃ under solar radiation, and the secondary radiant heat transferred to the room accounts for 18%-25% of the total heat gain.

[0031] 2. The sunshade and cooling effect is fixed, not intelligent, and lacks the operability of multi-control;

[0032] 3. The evaporative cooling approach was not used to supplement the shading cooling effect;

[0033] 4. Not suitable for renovation of existing buildings; many patents are specifically designed for installation during the initial construction phase.

[0034] 5. Lack of ability to freely set the shade area.

[0035] Regarding evaporative cooling products:

[0036] 1. Traditional evaporative cooling applications, such as building roof membrane spraying systems, use spray or mist water supply, which can easily lead to excessive slipperiness, severe watermarks, and dirt accumulation.

[0037] 2. It is greatly affected by wind conditions; strong winds can easily carry the spray mist away from the ideal cooling area.

[0038] 3. Sprayed water comes into direct contact with solar radiation, causing excessive evaporation, resulting in high water consumption and short cooling duration.

[0039] To address at least one of the aforementioned technical problems, this application designs an outdoor sunshade device for shading a surface. The device includes an evaporation component and a water replenishment component. The evaporation component comprises an evaporation plate made of a porous material. The water replenishment component replenishes water to the evaporation plate, allowing the water to permeate and evaporate within the plate. The system obtains the current time of the geographical location of the surface to be shaded. If the current time falls within a preset cooling period, a first thermal radiation intensity value is obtained. If this value is greater than a first preset thermal radiation intensity value, a first moisture content of the evaporation plate is obtained. Based on this moisture content, the water replenishment component replenishes water to the evaporation plate. As the thermal radiation on the outer surface of the evaporation plate increases, the evaporation efficiency also increases. Since water absorbs heat during evaporation, it can carry away the heat from the outdoor sunshade device itself, cooling the shading components and preventing secondary thermal radiation or even radiative cooling effects on the interior, thus further improving the shading effect of the outdoor sunshade device on the interior.

[0040] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0041] Example 1

[0042] Please see Figure 1 This invention provides an outdoor sunshade device, which is installed on a surface to be shaded. This surface can be the outer surface of a building component or other spaces requiring cooling. For example, it can be installed on the outdoor side of a glass window. In some embodiments, it can also be used in other scenarios requiring sunshade, such as installing outdoor sunshades on the top or sides of vehicles to prevent direct sunlight from raising the interior temperature; installing outdoor sunshades on the outside of tents to lower the indoor temperature; and installing outdoor sunshades on the outside of base stations to reduce the heat generated by electronic equipment and improve its operating efficiency.

[0043] Specifically, the outdoor sunshade device may include: an evaporation component 100 and a water replenishment component 200. The evaporation component 100 includes an evaporation plate 110, which is made of a rigid porous material. The water replenishment component 200 is used to replenish water to the evaporation plate 110, so that the water can permeate and evaporate in the evaporation plate 110.

[0044] The evaporation unit 100 includes a top plate 120 and a bottom plate 130, with an evaporation plate 110 disposed between the top plate 120 and the bottom plate 130;

[0045] The water supply component 100 includes a water tank 210 and a guide pipe 220. The guide pipe 220 connects the water tank 210 and the evaporation component 100. A stop valve 230 is provided between the water tank 210 and the guide pipe 220. The guide pipe 220 is provided with a drip inlet 221, which is used to supply water to the evaporation plate 110.

[0046] In this embodiment, the evaporator plate 110 is made of a rigid porous material. Moisture can naturally permeate from the internal water storage section to the surface under capillary action, and evaporate rapidly under solar radiation or air flow, absorbing the surrounding heat. This achieves passive cooling of the shaded object or space; the evaporative cooling process does not require active energy drive, and has the advantages of low energy consumption and environmental friendliness.

[0047] Specifically, the pore size of the rigid porous material used in the evaporator plate 110 can be 1~20μm, including but not limited to ceramic bricks, terracotta boards, porous concrete, etc. The porosity of the evaporator plate can be uniformly distributed or non-uniformly distributed; for example, a non-uniform distribution can be linearly distributed.

[0048] When the pores of the evaporator plate are non-uniformly distributed, for example, if the porosity of the evaporator plate is linearly distributed with higher porosity at the top than at the bottom, the porosity of the evaporator plate from top to bottom can be designed according to the reciprocal of the volumetric water content-time function to ensure that drip irrigation water penetrates as evenly as possible to the top and bottom of the evaporator plate. That is, the porosity distribution is related to the depth of the evaporator plate. For clay materials:

[0049]

[0050] For cement-based materials:

[0051]

[0052] in, Porosity This refers to the depth of the evaporation plate, expressed in meters (m). It is a constant, obtained from the above water spraying experiment.

[0053] Preferably, the porosity of the evaporation plate 110 is uniformly distributed. Because, given the same total volume and average porosity, the theoretical maximum water storage capacity is the same whether the pores are uniformly or non-uniformly distributed. In terms of water absorption efficiency and speed, a uniformly distributed pore distribution results in a more consistent water absorption rate across the entire area, allowing water to reach the far end faster, leading to faster overall saturation, and facilitating the establishment of continuous water absorption channels through capillary action. From the perspective of evaporation control and maintaining water supply stability, a uniform pore distribution can more evenly maintain the water tension and evaporation across the entire plate surface, resulting in a more continuous and stable evaporation process and a lower risk of dripping.

[0054] In some implementations, such as Figure 2As shown, in order to better fix the evaporator plate 110, the evaporator component 100 may also include a top plate 120 and a bottom plate 130, with the evaporator plate 110 disposed between the top plate 120 and the bottom plate 130.

[0055] In this way, the evaporator plate 110 can be supported by the top plate 120 and the bottom plate 130.

[0056] In some embodiments, the top plate 120 and the evaporator plate 110 can be connected by a snap-fit ​​connection. A first snap-fit ​​member is provided at the bottom of the top plate 120, and a second snap-fit ​​member is provided at the top of the evaporator plate 110. The first and second snap-fit ​​members can cooperate to snap and fix the top plate 120 and the evaporator plate 110 to prevent displacement. For example, either the first or second snap-fit ​​member can be a groove-shaped structure, and the other can be a protruding structure.

[0057] The base plate 130 and the evaporator plate 110 can also be connected by snap-fit. The specific connection method is similar to the connection method described above, and will not be repeated here.

[0058] To facilitate the smooth flow of water from the water supply component into the evaporator plate, the top of the evaporator plate 110 may include a first connecting portion 112, which has a funnel-shaped structure. The edge of the first connecting portion 112 can also engage with a first engaging groove in the top plate 120. The bottom of the evaporator plate 110 may also include a second connecting portion 113, which has a engaging protrusion that can engage with a second engaging groove 131 in the bottom plate 130.

[0059] To increase the stability of the connection between the evaporator plate 110 and the base plate 130, the second connecting part 113 can be trapezoidal in shape.

[0060] In some embodiments, the top plate 120 has a first splicing part at its upper end, and the bottom plate 130 has a second splicing part at its lower end;

[0061] When there are multiple evaporation components 100, the multiple evaporation components 100 are spliced ​​and fixed by the first splicing part and the second splicing part to obtain an evaporation assembly.

[0062] Furthermore, to avoid affecting indoor lighting, the outdoor shading device may include multiple evaporation components 100, with each evaporation plate 110 spaced a certain distance apart to facilitate light transmission. The evaporation plates 110 may be parallel to or inclined to the surface to be shaded; for example, the angle between the evaporation plate 110 and the surface to be shaded is 45°. Each evaporation component 100 has a first splicing part at its upper end of its top plate 120 and a second splicing part at its lower end of its bottom plate 130. Multiple evaporation components 100 are spliced ​​and fixed together through the first and second splicing parts. The splicing method between the first and second splicing parts may include snap-fitting, adhesive bonding, and riveting.

[0063] To keep the evaporator plate moist and enhance evaporation continuity, a water replenishment component 200 is installed to continuously replenish water to the evaporator plate, preventing failure due to water drying out. This improves the time continuity and stability of evaporation efficiency, reduces the frequency of manual maintenance, and enhances the intelligence and reliability of the equipment.

[0064] The water tank 210 can be located on the upper side of the evaporation component 100, facilitating the flow of water from the tank 210 into the evaporation component 100 via the guide pipe 220, eliminating the need for a water pump and saving cost and space. The water tank 210 can be a cuboid, cylindrical, or irregularly shaped container, with a water inlet at the top. A sealing cap can be installed at the water inlet to seal the water tank and prevent impurities from entering and clogging the pipes. The bottom may include a water outlet, which can be connected to the guide pipe 220 via threaded connection, quick-connect fitting, or flange sealing, etc., with no restrictions on the method used.

[0065] When outdoor shading equipment is used for shading the exterior surface of a building, the water tank 210 can also be connected to the building's water supply system to replenish the water tank 210. The water tank 210 can also integrate a float-type or electrode-type water level sensor, a transparent observation window, or an anti-algae coating to facilitate real-time monitoring of the water level.

[0066] The flow guide 220 can be a flexible hose, such as silicone or PVC, or a rigid tube, such as ABS or metal.

[0067] The drip inlet 221 can be a circular or slit-shaped opening, and the number can be a single row or multiple rows in an array. The aperture of the drip inlet 221 can be determined according to the evaporation efficiency of the evaporation plate 110. The drip inlet 221 can be located inside the evaporation plate 110 or on the upper side of the evaporation plate 110 to facilitate the flow of water from the drip inlet 221 into the evaporation plate.

[0068] The stop valve 230 can be a solenoid valve or a physical valve, which can be opened and closed by an external controller or by manual operation.

[0069] In some embodiments, when multiple evaporation components 100 are connected in an array to form an evaporation assembly, the guide pipe 220 is laterally disposed on the side of the evaporation assembly closer to the room, and each drip port 221 in the guide pipe 220 corresponds to the evaporation plate 110 in each evaporation component 100.

[0070] The guide pipe 220 can be horizontally arranged along the shaded side of the evaporator assembly to form a through-type water supply channel, enabling precise water replenishment across multiple nodes in a single pipe. The guide pipe 220 can also adopt a segmented quick-connect design, connected via threaded joints or clamps, facilitating expansion or replacement based on the scale of the evaporator assembly. The diameter of the guide pipe 220 can be determined through hydraulic calculations to ensure stable pressure at the drip inlet 221 at the end, preventing uneven water replenishment due to excessive array length. Figure 2As shown, a reserved groove 122 may be provided at the connection between the top plate 120 and the bottom plate 130 of the evaporation component 100 for installing the guide pipe 220, so that the relative position between the guide pipe 220 and the guide groove 121 is more stable and displacement is avoided.

[0071] In some implementations, such as Figure 4 As shown, it may also include a control component 300, which is electrically connected to the stop valve 230 and is used to control the opening and closing of the stop valve 230.

[0072] Among them, the water stop valve 230 connected to the control component 300 is a solenoid valve.

[0073] In some embodiments, the control component 300 further includes:

[0074] Time sensor 310 is used to determine whether shading is needed at the current time;

[0075] An outdoor solar radiation sensor 320 is used to measure solar radiation intensity.

[0076] A moisture detector 330 is installed in the evaporation plate 110, and the moisture detector 330 is used to measure the moisture content of the evaporation plate 110.

[0077] The use of outdoor sunshade equipment is related to the season. When it is the air-conditioning season, outdoor sunshade equipment can be turned on. Therefore, time sensor 310 can be used to determine whether it is the air-conditioning season.

[0078] For example, the time sensor 310 can employ a real-time clock module (RTC chip such as DS3231) with built-in temperature compensation and an annual error of <±2 minutes. It can also synchronize network time via the NTP protocol, making it suitable for intelligent building complexes requiring remote control. Additionally, seasonal judgment logic can be configured, specifically using a preset time interval method: storing the local air conditioning cooling season date range (e.g., May 15th - September 30th). When the time falls within the seasonal range and the temperature sensor reading is >28℃, shading is triggered.

[0079] In addition, the amount of solar radiation can be used to determine whether outdoor sunshade equipment needs to be turned on. Therefore, a solar radiation sensor 320 can be used to measure the amount of solar radiation. If the amount of solar radiation is higher than a preset threshold, the outdoor sunshade equipment will be turned on.

[0080] For example, the solar radiation sensor 320 can be made of: 1. Silicon photodiode type (such as LI-200R), with a measurement range of 0-2000 W / m² and a response wavelength of 300-1100 nm. 2. Thermopile type (such as ML8511), suitable for ultraviolet intensity detection and preventing material aging. For dynamic threshold adjustment, a time-division threshold can be considered: set the summer threshold to 800 W / m² and adjust it to 1200 W / m² in winter. Building orientation compensation: reduce the threshold by 15% when installed facing east / west (due to longer periods of direct sunlight).

[0081] When using outdoor shading equipment, it is necessary to determine whether the water stop valve 230 needs to be opened. Therefore, the moisture content of the evaporation plate 110 can be determined by the moisture detector 330. When the moisture content is lower than the moisture content threshold, the water stop valve 230 can be opened by the control component 300.

[0082] For example, the moisture detector 330 can employ: 1. Resistive type: stainless steel electrode array, which infers moisture content through impedance changes (accuracy ±5%). 2. Capacitive type: embedded PCB ring electrode, which detects changes in dielectric constant (anti-corrosion coating optional). In terms of control strategy, a gradient water replenishment method can be used: when the moisture content of the evaporator plate 110 is <30%, the stop valve 230 is fully opened; when the moisture content is 30%-50%, pulse-type water replenishment occurs.

[0083] In some possible implementations, the control component may also include a solar panel with solar cells mounted on top of the evaporation plate. When the first thermal radiation intensity value is greater than the first preset thermal radiation intensity value, it indicates that the sunlight is strong and the outdoor shading device needs to be turned on for shading and cooling. The use of a solar panel can cleverly convert solar radiation into electrical energy for storage when the outdoor shading device is turned on, providing power to the outdoor shading device and realizing energy self-circulation.

[0084] In some possible implementations, the outdoor shading device also includes a movable component that is fixedly connected to the evaporation component and is used to move the evaporation component.

[0085] The moving part can refer to the actuator used to drive the evaporation unit to move between the "shading position" and the "storage position", and may include slide rails, electric push rods, reel motors, guide rail sliders, motor lead screw assemblies, etc.

[0086] Outdoor surfaces requiring sunshade include, for example, the exterior walls of buildings, the outside of windows, and balcony railings.

[0087] Indoor lighting surfaces can refer to indoor areas near windows or transparent facades used for lighting.

[0088] During periods when shading or evaporative cooling is not required (such as at night, on cloudy days, or in winter), if the shading structure is fixed to the exterior window, it will continuously block natural light, affecting indoor lighting and energy efficiency. Introducing moving parts can enable the shading device to have the function of "actively retracting and unfolding", achieving an intelligent balance between dynamic shading needs and natural lighting needs, improving the overall energy efficiency and comfort of modern buildings. The moving control logic can also be linked with time and weather sensors to achieve automatic control.

[0089] Specifically, the evaporation component and the moving component can be rigidly connected. The moving component is installed in the window frame, exterior wall, or ceiling structure and can accommodate the retraction space.

[0090] When evaporative cooling needs to be activated, the control unit controls the movement of the moving parts, and the evaporator is pushed outside the window or to the area to be shaded.

[0091] When the control unit determines that there is no need to continue shading and cooling (such as when the temperature drops or the time period ends) or the user actively turns it off, the moving part reverses its movement and brings the evaporator back to a hidden position, such as a recess above the facade, the end of the track, or a louver storage slot.

[0092] Furthermore, the movable component can be a member capable of vertically flipping the outdoor sunshade device. This is achieved by rotatably connecting the top of the outdoor sunshade device to the top of the surface to be shaded, installing an electric air rod at the rotatable connection, and flipping the outdoor sunshade device using the electric air rod. The electric air rod can be connected to a control component, which controls the electric air rod to switch between two states.

[0093] Example 2

[0094] Please see Figure 5 This invention provides a control method for an outdoor sunshade device. The outdoor sunshade device is used to shade the surface to be shaded. The outdoor sunshade device includes an evaporation component and a water replenishment component. The evaporation component includes an evaporation plate made of a rigid porous material. The water replenishment component is used to replenish water to the evaporation plate, allowing the water to permeate and evaporate within the evaporation plate. The method includes:

[0095] S501, Obtain the current time of the geographical location of the area to be shaded.

[0096] Among them, the current time of the geographical location of the surface to be shaded can be obtained through a time sensor. The time sensor is used to determine whether the current time is within the "cooling required" time period set by the device, so as to avoid ineffective operation at night or on rainy days. For example, if the geographical location of the surface to be shaded is Beijing, then the current time obtained is the current Beijing time.

[0097] Furthermore, the current time of the geographical location of the area to be shaded can be obtained according to a preset detection frequency. For example, the detection frequency is once per hour.

[0098] Specifically, the time sensor first reads the time module value through the control component (such as a PLC or microcontroller); then it compares it with the preset cooling time period (such as 11:00–16:00 Beijing time); if it falls within that time period, it proceeds to the next step.

[0099] S502. If the current time is within the preset cooling time period, obtain the first thermal radiation intensity value received by the evaporator plate.

[0100] The first thermal radiation intensity value can refer to the radiation intensity value measured by the solar radiation sensor. Here, it is called the first thermal radiation intensity value in order to distinguish it from the radiation intensity values ​​measured at other times.

[0101] The initial thermal radiation intensity value can be obtained through a solar radiation sensor, which measures the amount of solar energy received per unit area. This ensures that the system only initiates evaporative cooling under strong solar radiation conditions, thus avoiding water waste.

[0102] Specifically, the current irradiance can be read from the solar radiation sensor by controlling the components;

[0103] If the value is satisfied with the first preset thermal radiation intensity value (e.g., 500 W / m²), proceed to the next step.

[0104] The first preset thermal radiation intensity value can be dynamically set according to different regions. For example, the preset thermal radiation intensity value is 800W / m² for regions near the equator and 1200W / m² for regions far from the equator. It can also be automatically corrected by ±15% according to the building orientation.

[0105] In some implementations, if the current time falls within a preset cooling time period, obtaining the first thermal radiation intensity value received by the evaporator plate may include:

[0106] If the current time is within the preset cooling period, obtain the weather forecast information of the geographical location of the area to be shaded;

[0107] Based on the maximum temperature value within the temperature range in the weather forecast information, determine whether the first temperature value is greater than the first temperature threshold.

[0108] If the first temperature value is greater than the first preset temperature value, then the first thermal radiation intensity value received by the evaporator plate is obtained.

[0109] In this embodiment, the first temperature threshold can be set according to the human comfort temperature, for example, 28℃. This embodiment combines time and meteorological information to achieve intelligent judgment of the cooling logic, avoiding operation of the shading cooling system during periods of low temperature in the morning and evening or when cooling is not needed; reducing unnecessary start-up frequency, and improving the system's intelligence level and energy utilization efficiency. Temperature prediction enables "early response," determining in advance whether high temperatures are likely based on the maximum temperature range in the weather forecast information; improving the reaction speed to impending heat loads, enabling early shading, and optimizing the user experience.

[0110] Finally, thermal radiation intensity is introduced as a secondary criterion to improve the accuracy of cooling control. Even if the temperature is high, if the radiation is not strong (such as in cloudy weather), the cooling can be appropriately delayed or not activated; this reduces resource waste and realizes a truly "on-demand" climate-sensing control logic.

[0111] In some possible implementations, S502 may include:

[0112] If the first thermal radiation intensity value is less than or equal to the first preset thermal radiation intensity value, then obtain the second temperature value of the surface to be shaded;

[0113] If the second temperature value is greater than the second temperature threshold, the water replenishment component will be activated to replenish water to the evaporator plate.

[0114] The second temperature value can refer to the temperature value measured by the temperature sensor, which can be set on the side of the surface to be shaded that is closer to the interior.

[0115] The second temperature threshold can be set according to human comfort, for example, 28℃.

[0116] In this embodiment, when the external solar radiation is not strong but the room temperature is still high (such as hot and humid weather, or evening heat lag), the temperature value of the surface to be shaded can be introduced as an independent water replenishment trigger dimension to improve the system's responsiveness to human body temperature and thus improve the actual shading effect.

[0117] S503. If the first thermal radiation intensity value is greater than the first preset thermal radiation intensity value, then obtain the first moisture content of the evaporation plate.

[0118] Here, "first moisture content" refers to the moisture content measured by a moisture detector; for clarity, it is referred to as "first moisture content" here. A moisture detector can be a device that detects the moisture content of the evaporator plate or its water storage section; it may be a capacitive, impedance, or infrared moisture sensor. It is used to determine whether the evaporator plate is short of water, and only activates water replenishment when water is scarce, effectively saving water.

[0119] In this step, if the first thermal radiation intensity value is greater than the first preset thermal radiation intensity value, it means that an evaporation plate is needed for evaporation and cooling. Therefore, it is necessary to determine whether there is enough moisture in the evaporation plate. Thus, the first moisture content is obtained, and the moisture content is used to determine whether there is enough moisture in the evaporation plate.

[0120] S504. Based on the first moisture content, control the water replenishment component to replenish water to the evaporator plate.

[0121] In this step, after obtaining the first moisture content, the moisture content of the evaporator plate can be determined by judging the first moisture content, thereby controlling the water replenishment component to replenish water to the evaporator plate.

[0122] In some embodiments, step S504, controlling the water replenishment component to replenish water to the evaporation plate according to the first moisture content, may include:

[0123] S601. Determine whether the first moisture content is less than or equal to the first preset moisture content;

[0124] The first preset moisture content can refer to a preset minimum allowable moisture content threshold. If the moisture content falls below this value, water replenishment must be triggered. This is used to determine whether the evaporator plate has entered a water shortage state; it is the trigger condition for the entire water replenishment process, equivalent to a "lower limit alarm threshold".

[0125] The system reads the moisture content output from the moisture detector in real time and compares it with a set threshold. If the moisture content is less than or equal to the threshold, the system initiates a water replenishment process. This prevents the system from operating too dry or failing due to evaporation; it ensures that the system only needs water replenishment, thus saving water and increasing efficiency.

[0126] S602. If the first moisture content is less than or equal to the first preset moisture content, the first water absorption rate of the evaporation plate is determined from the preset mapping relationship between moisture content and water absorption rate based on the first moisture content.

[0127] The first water absorption rate can refer to the maximum rate at which the evaporation plate can absorb water per unit time under the current moisture content, in units of L / min or m³ / s.

[0128] The mapping relationship can be established by experimentally created curves or tables showing the correspondence between "moisture content" and "water absorption rate".

[0129] In this step, if the first moisture content is less than or equal to the first preset moisture content, it means that water needs to be added to the evaporation plate. However, since the water absorption capacity of the material varies under different moisture conditions, the higher the moisture content, the lower the capillary water absorption rate usually is. Therefore, there is a possibility of excessive water addition leading to dripping. Therefore, the optimal water absorption capacity of the evaporation plate for the current state can be obtained by looking up a table or fitting a function.

[0130] Specifically, the moisture content can be used as input to find / calculate the water absorption rate (such as linear / exponential / piecewise linear interpolation) to avoid surface water accumulation or dripping caused by the water replenishment rate exceeding the water absorption rate, thus achieving precise dynamic water replenishment control.

[0131] For example, if the mapping relationship is in the form of a linear function: Where θ is the current volumetric water content, and a and b are fitting coefficients, then when the water content is 0.3, if The current maximum absorption capacity is 0.3 L / min.

[0132] S603. Determine the first water spraying rate of the water replenishment component based on the first water absorption rate, wherein the first water spraying rate is less than or equal to the first water absorption rate.

[0133] The water spray rate refers to the target flow rate that is actually required to control the water supply equipment (such as a solenoid valve or a variable frequency pump).

[0134] In this step, based on the first water absorption rate calculated above, the first water spraying rate of the water replenishment component is further determined. To prevent water from dripping due to exceeding the instantaneous absorption capacity of the evaporation plate, the set first water spraying rate must be less than or equal to the first water absorption rate. To improve steady-state safety, in S603, the first water spraying rate is: , where Q 淋 R is the first water spraying rate. 吸 The first water absorption rate is η, and the safety factor is η (e.g., 0.85 to 0.95).

[0135] For example, if the water absorption rate is 0.3 L / min and η is 0.9, then the final water spraying rate is 0.27 L / min.

[0136] S604. Based on the first water spraying rate, control the water replenishment component to replenish water to the evaporation plate.

[0137] In this step, based on the first water spray rate calculated above, the water replenishment component is controlled to perform the actual water replenishment operation. The control method can be real-time adjustment of pump speed and solenoid valve opening, or intermittent water supply in the form of PWM duty cycle, ensuring that the average water replenishment rate does not exceed the target value. During execution, a closed-loop feedback mechanism can be used to dynamically adjust the flow rate or moisture content, ensuring that the water replenishment process is both fast and efficient, without causing surface accumulation or water dripping, thereby achieving refined management of the system's water replenishment to the evaporator plate.

[0138] In some embodiments, S604, determining the first water spraying rate of the water replenishment component based on the first water absorption rate, may include:

[0139] S6041. Obtain the first evaporation efficiency of the evaporator plate.

[0140] The first evaporation efficiency can refer to the ability of the evaporation plate to remove moisture through the evaporation process per unit time, and can be expressed in units of mass or volume, such as L / min or g / s.

[0141] In this step, the magnitude of the first water spraying rate is also affected by the evaporation efficiency of the evaporation plate. Therefore, the current first evaporation efficiency of the evaporation plate is obtained. The first evaporation efficiency is closely related to environmental conditions and mainly depends on the relative humidity of the air, ambient temperature, wind speed, solar irradiance, etc.

[0142] S6042. Based on the first evaporation efficiency and the first water absorption rate, determine the first water spraying rate of the water replenishment component, wherein the first water spraying rate is less than or equal to the sum of the first evaporation efficiency and the first water absorption rate.

[0143] In this step, the first evaporation efficiency is added to the first water absorption rate to obtain the maximum total water flux that the evaporation plate can withstand under the current state. This flux includes the "amount of water absorbed into the pores" and the "amount of water evaporated and discharged," which together represent the maximum safe water replenishment rate that the evaporation plate can handle without dripping. Therefore, the first water spraying rate must satisfy: Q 淋 ≤R 吸 +R 蒸

[0144] That is, the first water spraying rate must not exceed the sum of the instantaneous absorption capacity and instantaneous evaporation capacity of the evaporation plate. In S6042, the first water spraying rate can also be: , where R 蒸 Let η be the first evaporation efficiency, and η be the safety factor, where η ∈ (0.8, 1.0).

[0145] For example, if the current water absorption rate is 0.30 L / min and the evaporation rate is 0.12 L / min, the system can be set to η = 0.9, then: This value is the target flow rate used to drive the water supply pump or control the solenoid valve.

[0146] This design ensures that the amount of water replenished does not exceed the absorption capacity and fully utilizes the evaporation potential under the current environment, thereby achieving the goal of efficient, water-saving and safe water replenishment control, avoiding local over-wetting or dripping, and improving the system's operational stability and energy efficiency.

[0147] Furthermore, obtaining the first evaporation efficiency of the evaporator plate can include:

[0148] The first wind speed experienced by the evaporator plate, the first surface temperature of the evaporator plate, and the first temperature difference between the air temperature are obtained.

[0149] The first evaporation efficiency of the evaporator plate is obtained based on the first thermal radiation intensity value, the first wind speed, and the first temperature difference value.

[0150] Here, the first wind speed can refer to the wind speed value at the geographical location of the evaporator plate as measured by a wind speed sensor. For the sake of distinction, it is referred to as the first wind speed here. The wind speed sensor can be installed on the evaporator plate or in other locations, as long as it can measure the wind speed value experienced by the evaporator plate.

[0151] The first surface temperature can refer to the surface temperature value of the evaporator plate measured by the temperature sensor. Here, it is referred to as the first surface temperature for the sake of distinction. The temperature sensor can be set on the evaporator plate, as long as it can measure the temperature value of the surface of the evaporator plate.

[0152] Air temperature can refer to the air temperature value at the geographical location of the evaporator plate, as measured by a temperature sensor.

[0153] The first temperature difference can refer to the difference between the first surface temperature of the evaporator and the air temperature. For example, if the first surface temperature is 40 degrees Celsius and the air temperature is 30 degrees Celsius, the first temperature difference is 10 degrees Celsius.

[0154] In this embodiment, environmental parameters closely related to the evaporation process are first obtained, including the first wind speed, the temperature difference between the surface temperature of the evaporator plate and the air temperature, and the current thermal radiation intensity. These parameters affect the convective heat transfer evaporation capacity and the radiation-enhanced evaporation capacity of the evaporator plate, respectively.

[0155] Specifically, wind speed affects the thickness of the air boundary layer and the mass transfer rate, temperature difference affects the water vapor partial pressure gradient, and solar radiation directly heats the surface of the evaporator plate, increasing its temperature and boosting the evaporation driving force. Therefore, the system can acquire these three parameters in real time using appropriate sensors.

[0156] In some possible implementations, the first evaporation efficiency of the evaporator plate is obtained based on a first thermal radiation intensity value, a first wind speed, and a temperature difference value, which may include:

[0157] Obtain the current relative humidity parameter of the air, and calculate the humidity difference between the relative humidity parameter and the saturation state;

[0158] The real-time wind speed of the environment where the evaporator plate is located and the temperature difference between the surface temperature of the evaporator plate and the air temperature are obtained.

[0159] The first evaporation component is obtained based on the humidity difference, real-time wind speed, and temperature difference.

[0160] The second evaporation component is obtained based on the thermal radiation intensity parameters received on the surface of the evaporation plate;

[0161] The first evaporation efficiency is obtained based on the first evaporation component and the second evaporation component.

[0162] This solution achieves accurate calculation of the actual evaporation efficiency of the evaporator plate by extracting environmental parameters step by step. Specifically, the system first acquires the current relative humidity of the air and compares it with the theoretical saturation humidity to determine the degree of air dryness, i.e., the humidity difference. Then, the system collects the real-time wind speed of the environment surrounding the evaporator plate, as well as the temperature difference between the evaporator plate surface temperature and the air temperature. These factors collectively determine the basic capacity for water to evaporate from the evaporator plate surface. Based on these three parameters—humidity difference, wind speed, and temperature difference—the system comprehensively calculates the first evaporation component of the evaporator plate, reflecting the evaporation efficiency dominated by environmental conditions. Simultaneously, the system also acquires the intensity of thermal radiation received by the evaporator plate surface and calculates the second evaporation component due to radiative heating. Finally, these two evaporation components are combined to obtain the first evaporation efficiency of the evaporator plate, reflecting the actual evaporation environment. This efficiency is used for subsequent water replenishment control and system optimization, achieving more scientific and energy-efficient evaporator plate management.

[0163] For example, it can be obtained through the following formula:

[0164] ;

[0165] in:

[0166] R 蒸 The first evaporation efficiency;

[0167] RH stands for relative humidity.

[0168] v 0.5 This refers to the current wind speed;

[0169] ΔT is the temperature difference;

[0170] G is the first thermal radiation intensity value;

[0171] C1 and C2 are constants obtained from experimental fitting.

[0172] Evaporation efficiency can be defined as the amount of water that can actually be evaporated per unit area per unit time, expressed in units such as g / m²·s or L / min. It is calculated by adding the evaporation capacity of convection-enhanced evaporation (driven by wind speed and temperature difference) and radiation-enhanced evaporation (driven by solar radiation), thus obtaining the first evaporation efficiency value of the evaporation plate under the current environmental conditions. This value will be used to determine the upper limit of the subsequent water replenishment rate, enabling the system to fully utilize the environmental evaporation potential and optimize water resource use without exceeding its absorption capacity.

[0173] In some possible implementations, determining the first water spraying rate of the water replenishment component based on the first evaporation efficiency and the first water absorption rate may include:

[0174] The optimization objectives for the water spraying scenario are obtained, including maximizing evaporation efficiency and minimizing water waste.

[0175] Obtain preset constraints, including a first water spraying rate less than or equal to a first water absorption rate, a first water spraying rate less than or equal to a second evaporation efficiency, and a first moisture content maintained within a preset evaporation range.

[0176] Based on the constraints and the optimization objectives, the first water spraying rate is subjected to multi-objective optimization processing.

[0177] Based on the optimization results, the first water spraying rate is obtained.

[0178] The preset evaporation range can refer to the preset range of moisture content suitable for evaporation plates to carry out evaporation.

[0179] In this scheme, the system uses the initial moisture content of the evaporator plate as a basis, collects its current state in real time, and dynamically optimizes the water replenishment decision by combining the initial water absorption rate of the evaporator plate during the water replenishment process and the initial evaporation efficiency calculated based on environmental conditions. There are two optimization objectives: first, to ensure that the surface of the evaporator plate is always in the optimal moisture content range to maximize the evaporation effect; and second, to avoid the water replenishment exceeding the actual absorption and evaporation capacity of the evaporator plate, thereby reducing water waste. The system finds the upper limit of the corresponding water absorption rate based on the actual measured initial moisture content, and takes the smaller of these two values ​​as the constraint range for the water replenishment rate, combined with the current evaporation efficiency. Then, within this constraint range, for different water replenishment rates, it calculates the corresponding evaporation per unit time (i.e., evaporation efficiency) and water waste (i.e., the difference between the replenishment amount and the actual evaporation and absorption amounts). By balancing these two indicators, the water replenishment rate that ensures high evaporation efficiency while minimizing water waste is selected as the operating parameter of the current water replenishment component. Ultimately, this multi-objective optimization method can dynamically adapt to changes in environment and state, achieving an organic unity of maximizing evaporation efficiency and saving water.

[0180] For example, assume the real-time moisture content of the evaporator plate is 60% (first moisture content). According to the system's table lookup, at this moisture content, the evaporator plate can absorb a maximum of 20 ml of water per minute (first absorption rate). At this time, the measured wind speed was relatively high and the temperature difference was moderate. Based on the real-time thermal radiation data, the system calculated that the maximum evaporation capacity of the evaporator plate was 18 ml per minute (first evaporation efficiency). ).

[0181] The system first determines that the water replenishment rate cannot exceed the minimum values ​​of the water absorption rate and evaporation efficiency, which is no more than 18 ml / min. Next, the system simulates several alternative water replenishment rates, such as testing 15 ml / min, 17 ml / min, and 18 ml / min respectively.

[0182] Theoretically, the evaporation effect is best when the rate is set to 18 ml / min. However, if the actual evaporation rate is slightly lower or the absorption in a local area is slightly slower, water may accumulate, resulting in a small amount of water being wasted.

[0183] If set to 15ml / min, it can basically ensure that all the water is absorbed and evaporated, but at this time the water content on the surface of the evaporation plate may be slightly lower than the optimal level, and the evaporation rate per unit time will be slightly lower.

[0184] If set to 17 ml / min, within the range allowed by the actual absorption and evaporation capacity of the evaporation plate, efficient evaporation can be maintained while basically avoiding waste.

[0185] Through real-time simulation and comparison, the system found that setting the water replenishment rate to 17 ml / min resulted in near-maximum evaporation efficiency while minimizing water waste. Therefore, 17 ml / min was ultimately selected as the optimal replenishment rate for this round. The system then sends this rate to the water replenishment component, dynamically executing the replenishment operation. The entire decision-making process is automatically reassessed every few minutes to ensure that evaporation efficiency and water resource utilization are always maximized.

[0186] In some implementations, the method may further include:

[0187] When the water replenishment component is in the water replenishment state, the second moisture content in the evaporation plate is obtained;

[0188] If the second moisture content is greater than or equal to the second preset moisture content, the water replenishment component is controlled to stop replenishing water. The second preset moisture content is greater than the first preset moisture content and less than the saturated moisture content of the evaporation plate.

[0189] The second moisture content can refer to the current moisture content value detected in real time during the water replenishment process, which is used to determine whether saturation or a sufficient level has been reached; it is different from the first moisture content in S503, which is used to trigger water replenishment, while the second moisture content is used to terminate water replenishment control.

[0190] The second preset moisture content can refer to the upper limit of the system design, and is generally set within the critical range of the saturated water absorption rate of the evaporation plate material (such as 50~70%). Its function is to terminate the water replenishment process and prevent oversaturation from causing water leakage or material expansion and damage.

[0191] Saturated moisture content can refer to the maximum volumetric moisture content of the evaporation plate.

[0192] Different materials have different volumetric moisture contents. For clay:

[0193]

[0194] For cement-based materials:

[0195]

[0196] in, This refers to the volumetric water content. The absorption time is expressed in seconds (s). It is a constant;

[0197] The value is related to the specific material properties and the water spraying rate, and can be obtained through water spraying experiments in combination with the water replenishment rate and the material.

[0198] The water spray test involves artificially spraying water onto a material specimen, then removing the specimen at regular intervals (e.g., 30 seconds, 1 minute, 2 minutes), wiping off surface water with a soft, saturated sponge, and placing it on an electronic balance under load. At least 10 sets of data are measured, and the results are used to perform fitting calculations. The value.

[0199] Taking a certain type of permeable concrete as an example, the water absorption characteristics at a water spray rate of 1.0 mm / min are as follows: Figure 6 As shown, we can obtain a=7.86, b=0.00010, c=-8.01, d=-0.0066.

[0200] After water replenishment begins, to prevent excessive moisture, the moisture content needs to be monitored in real time. This step introduces a dynamic feedback mechanism to ensure that water replenishment is controllable, moderate, and terminated in a timely manner; a closed-loop control logic is implemented: triggering when the moisture content is below the first moisture content and terminating when it is above the second moisture content. When the second moisture content reaches the safe upper limit, it indicates that the evaporator plate has fully absorbed water and no further water replenishment is needed; if the stop valve is not closed in time, it may lead to water overflow, structural damage, or excessive water consumption.

[0201] Specifically, the control unit continuously monitors the status of the stop valve; once the stop valve is in the "open" state, the system periodically reads data from the moisture detector; the sampling period can be set (e.g., every 10 seconds), and the readings are temporarily stored for comparison. The control unit compares the sampled second moisture content with a second preset threshold; if the value is greater than or equal to the set value (e.g., set to 60%), it immediately issues a "close the stop valve" control command; simultaneously, it can reset the water replenishment status flag to prepare for the next round of detection.

[0202] like Figure 7As shown, this is one possible implementation method provided by this example. Based on the first moisture content, controlling the water replenishment component to replenish water to the evaporation plate can specifically include:

[0203] Get the current time of the geographical location of the area to be shaded;

[0204] If the current time is within the preset cooling period, then obtain the first thermal radiation intensity value received by the evaporator plate;

[0205] If the first thermal radiation intensity value is greater than the first preset thermal radiation intensity value, then the first moisture content in the evaporation plate is obtained;

[0206] Determine whether the first moisture content is less than or equal to the first preset moisture content;

[0207] If the first moisture content is less than or equal to the first preset moisture content, the first water absorption rate of the evaporator is determined from the preset mapping relationship between moisture content and water absorption rate based on the first moisture content.

[0208] Based on the first water absorption rate, the first water spraying rate of the water replenishment component is determined, wherein the first water spraying rate is less than or equal to the first water absorption rate;

[0209] Based on the first water spray rate, control the water replenishment component to replenish water to the evaporation plate;

[0210] When the water replenishment component is in the water replenishment state, the second moisture content in the evaporation plate is obtained;

[0211] If the second moisture content is greater than or equal to the second preset moisture content, the water replenishment component is controlled to stop replenishing water. The second preset moisture content is greater than the first preset moisture content and less than the saturated moisture content of the evaporation plate.

[0212] In some embodiments, the outdoor sunshade device further includes a movable component fixedly connected to the evaporation component for moving the evaporation component and controlling the water replenishment component to replenish water to the evaporation plate according to a first moisture content. It may also include:

[0213] S701. Determine whether the evaporator is on the side to be shaded.

[0214] In the control process, whether to replenish water to the evaporator plate is determined based on whether the first moisture content has reached a preset lower limit. However, before the water replenishment action is executed, it is also necessary to determine whether the current evaporation component is already on the surface to be shaded, that is, the target coverage area where the evaporator plate is located. This determination can be achieved through position sensors, encoders, visual recognition, or magnetic limit devices.

[0215] S702. If the evaporator is on the side to be shaded, the water replenishment component is controlled to replenish water to the evaporator plate according to the first moisture content.

[0216] In this step, if it is determined that the evaporator is already above the surface to be shaded, it indicates that the evaporator plate has been covered. At this time, the water replenishment control process can continue according to the aforementioned logic: if the first moisture content is lower than the first preset value, the water absorption rate and evaporation efficiency are determined based on the moisture content, the first water spraying rate is further calculated, and the water replenishment component is controlled to perform water replenishment operation. At this time, water replenishment is safe and reliable, and will not cause direct evaporation loss of moisture exposed to sunlight or cause uneven wetting.

[0217] S703. If the evaporation component is not on the shading surface, the moving component is controlled to move the evaporation component to the shading surface, and the water replenishment component is controlled to replenish water to the evaporation plate according to the first moisture content.

[0218] In this step, if it is determined that the evaporator has not yet been moved to the shading surface, the water replenishment operation is delayed. The system first activates the moving component to automatically move the evaporator to the target position, i.e., above the shading surface where the evaporator plate is located, ensuring that the evaporator plate is effectively covered. Only after the movement is completed and the correct position is confirmed will the system continue with the water replenishment process.

[0219] This control logic ensures that the evaporator plate is always replenished with water under shade protection, avoiding water loss caused by water replenishment in strong sunlight environment. It also prevents performance instability caused by local rapid drying of the evaporator plate surface, thereby improving the overall system's water-saving efficiency, evaporation uniformity and structural intelligence.

[0220] In some implementations, since the angle of sunlight changes over time, a single-angle sunshade may allow sunlight to enter the room in some cases, failing to effectively block sunlight. Therefore, the outdoor sunshade device also includes a drive mechanism. The upper and lower ends of the evaporator plate are respectively connected to the drive mechanism, causing the evaporator plate to rotate under the drive mechanism. The step of controlling the water replenishment component to replenish water to the evaporator plate according to the first moisture content includes:

[0221] Obtain the angle between the evaporator plate and the sun;

[0222] If the angle value does not meet the preset angle range, then a first offset value for the evaporator plate is determined based on the angle value.

[0223] Obtain the current wind direction and second wind speed experienced by the evaporator plate;

[0224] If the second wind speed is greater than a preset wind speed threshold, and the wind direction angle between the current wind direction and the evaporation surface of the evaporator exceeds a preset angle threshold, then a second offset value for the evaporator is determined based on the current wind direction.

[0225] The target offset value is determined based on the first weight corresponding to the first offset value and the second weight corresponding to the second offset value.

[0226] The evaporator plate is rotated according to the target offset value and the drive mechanism;

[0227] Based on the first moisture content, the water replenishment component is controlled to replenish water to the evaporation plate.

[0228] The drive mechanism includes a motor and a transmission rack, with the motor connected to the control components. The evaporator plate of the outdoor sunshade device can be connected to the rotating shaft in the transmission rack at both its upper and lower ends. Driven by the motor and the transmission rack, the evaporator plate rotates, and the opening of the rotating shaft at the upper end of the evaporator plate is connected to the water supply component.

[0229] The second wind speed and current wind direction can be collected through the wind direction recognition module.

[0230] The current wind direction ranges from 0° to 360°, and the wind angle ranges from 0° to 360°.

[0231] The preset wind speed threshold can refer to a parameter value that is set in advance in the control unit to limit the current wind speed, such as 2m / s.

[0232] The preset angle threshold can refer to a parameter value that is preset in the control unit to limit the current wind direction, such as 15°.

[0233] The wind speed value is greater than a preset wind speed threshold, and the wind direction angle relative to the current orientation angle of the evaporator plate exceeds a preset angle threshold, for example, the current wind speed is greater than 2 m / s and the wind direction angle is greater than 15°.

[0234] The control components also include a solar angle detector and a position feedback unit. The solar angle detector is located on the outside of the outdoor sunshade device and is used to measure the angle between the sunshade and the sun. The position feedback unit is located at the end of the drive rack shaft and is used to detect the angle of the evaporator plate.

[0235] Specifically, to balance evaporation efficiency and shading effect, a first weight and a second weight can be set to perform weighted optimization on both. After optimization, the target offset value is determined, and the drive mechanism is controlled to adjust the evaporator plate to the target angle based on the target offset value. The sum of the first weight and the second weight is 1. For example, if the first weight is 0.4 and the second weight is 0.6, when the first offset value is 20° and the second offset value is 40°, the target offset value is 0.4*20°+0.6*40°=32°, which means that the angle of the sunshade plate will be offset by 32°.

[0236] The method in this embodiment can dynamically maximize evaporation efficiency by rotating the evaporator plate, while also balancing shading and lighting. The evaporator plate changes with the elevation angle, automatically opening partially in the morning / afternoon to increase indoor illuminance. It can dynamically match the angle of sunlight and the wind direction, balancing evaporation efficiency and shading effect, and the weights can be adjusted according to different operating conditions.

[0237] In some embodiments, controlling the water replenishment component to replenish water to the evaporation plate according to the first moisture content further includes:

[0238] Determine whether the first moisture content is less than or equal to the first preset moisture content;

[0239] If the first moisture content is less than or equal to the first preset moisture content, then the first water absorption rate of the evaporation plate is determined from the preset mapping relationship between moisture content and water absorption rate based on the first moisture content.

[0240] The third wind speed experienced by the evaporator plate, the second surface temperature of the evaporator plate, and the second temperature difference between the air temperature are obtained.

[0241] The second evaporation efficiency of the evaporator plate is obtained based on the first thermal radiation intensity value, the third wind speed, and the second temperature difference value.

[0242] The second water spraying rate of the water replenishment component is determined based on the second evaporation efficiency and the first water absorption rate, wherein the second water spraying rate is less than or equal to the sum of the second evaporation efficiency and the first water absorption rate;

[0243] The water replenishment component is controlled to replenish water to the evaporation plate according to the second water spraying rate.

[0244] The third wind speed can refer to the wind speed obtained after the moving component moves the evaporator plate.

[0245] The second surface temperature can refer to the surface temperature value of the evaporator plate measured by a temperature sensor; here it is referred to as the second surface temperature for distinction.

[0246] The second temperature difference can refer to the difference between the second surface temperature of the evaporator plate and the air temperature.

[0247] In this embodiment, precise intelligent water replenishment control is achieved by dynamically sensing the actual moisture content of the evaporator plate and environmental changes. Specifically, the system first determines whether the current first moisture content of the evaporator plate is lower than or equal to a set minimum safety threshold. If it is, water replenishment is required. At this point, based on the current first moisture content, the system determines the effective water absorption rate of the evaporator plate under this moisture condition from a preset relationship between moisture content and water absorption rate. Subsequently, the system collects the third wind speed at the location of the evaporator plate after adjustment by the moving parts, and the second surface temperature of the evaporator plate detected by a temperature sensor, comparing these with the air temperature to calculate the second temperature difference. Combining this temperature difference, wind speed, and actual heat radiation intensity, the system calculates the second evaporation efficiency of the evaporator plate under the current environment. Then, based on the calculated second evaporation efficiency and the previously determined first water absorption rate, the system comprehensively determines the second water spraying rate of the water replenishment component, ensuring that the water replenishment speed does not exceed the limits of evaporation and absorption, nor does it waste water resources. Finally, the system automatically replenishes water to the evaporator plate according to this water spraying rate, forming an adaptive, precise, and energy-saving dynamic water replenishment control process.

[0248] In some possible implementations, in order to maximize evaporation efficiency and minimize water waste, determining the second water spraying rate of the water replenishment component based on the second evaporation efficiency and the first water absorption rate may include:

[0249] The optimization objectives for the water spraying scenario are obtained, including maximizing evaporation efficiency and minimizing water waste.

[0250] Obtain preset constraints, including a second water spraying rate less than or equal to a first water absorption rate, a second water spraying rate less than or equal to a second evaporation efficiency, and a first moisture content maintained within a preset evaporation range;

[0251] Based on the constraints and the optimization objectives, the second water spraying rate is subjected to multi-objective optimization processing.

[0252] Based on the optimization results, the second water spraying rate was obtained.

[0253] In this scheme, the system uses the initial moisture content of the evaporator plate as a basis, collects its current state in real time, and dynamically optimizes the water replenishment decision by combining the initial water absorption rate of the evaporator plate during the water replenishment process and the second evaporation efficiency calculated based on environmental conditions. There are two optimization objectives: first, to ensure that the surface of the evaporator plate is always in the optimal moisture content range to maximize the evaporation effect; and second, to avoid the replenishment amount exceeding the actual absorption and evaporation capacity of the evaporator plate, thereby reducing water waste. The system finds the upper limit of the corresponding water absorption rate based on the actual measured initial moisture content, and takes the smaller of these two values ​​as the constraint range for the water replenishment rate, combined with the current evaporation efficiency. Then, within this constraint range, for different water replenishment rates, it calculates the corresponding evaporation amount per unit time (i.e., evaporation efficiency) and water waste amount (i.e., the difference between the replenishment amount and the actual evaporation and absorption amounts). By balancing these two indicators, the water replenishment rate that ensures high evaporation efficiency while minimizing water waste is selected as the operating parameter of the current water replenishment component. Ultimately, this multi-objective optimization method can dynamically adapt to changes in environment and state, achieving an organic unity of maximizing evaporation efficiency and saving water.

[0254] In some possible implementations, in addition to conventionally replenishing the evaporator plate with water according to the second water spray rate, a feedback-based automatic rinsing mechanism can also be introduced. After controlling the water replenishment component to replenish the evaporator plate with water according to the second water spray rate, the mechanism may further include:

[0255] The actual evaporation efficiency of the evaporation plate is obtained based on the evaporation time and evaporation rate.

[0256] If the difference between the actual evaporation efficiency and the second evaporation efficiency is greater than the preset evaporation efficiency difference;

[0257] Then the second water spray rate is set as the rinsing value, and the evaporator plate is rinsed by the second water spray rate.

[0258] In this system, after water replenishment, the system calculates the actual evaporation efficiency of the evaporator plate based on the set evaporation time and the actual amount of water evaporated. If the difference between this actual evaporation efficiency and the second evaporation efficiency predicted based on environmental conditions exceeds an allowable threshold, it indicates that the evaporator plate may have surface blockage, dirt accumulation, or other abnormalities affecting normal evaporation. In this case, the system automatically switches the second water spray rate to a specially set higher "rinsing value" to powerfully rinse the evaporator plate. Through a short period of high-flow water replenishment, it helps remove impurities or blockages from the evaporator plate surface, restoring its normal evaporation capacity. This enables intelligent maintenance of the evaporator plate, ensuring long-term efficient operation of the equipment.

[0259] In some possible implementations, it is necessary to determine whether outdoor shading equipment is still needed to avoid wasting resources. Therefore, controlling the water replenishment component to replenish water to the evaporation plate based on the first moisture content may further include:

[0260] When the evaporation component blocks the surface to be shaded, the second thermal radiation intensity value received by the evaporation plate is obtained;

[0261] If the second thermal radiation intensity value is less than or equal to the second preset thermal radiation intensity value, then the status of the water replenishment component is obtained, and the second preset thermal radiation intensity value is less than or equal to the first preset thermal radiation intensity value.

[0262] If the water replenishment component is in the water replenishment state, then turn off the water replenishment component and control the moving component to move the evaporation component away from the surface to be shaded;

[0263] If the water supply component is in the off state, the control moving component will move the evaporation component away from the surface to be shaded.

[0264] Through the above steps, a coordinated shading and water replenishment mechanism can be achieved: when the heat radiation value under the evaporator plate has decreased to a safe range and water replenishment is no longer required, the evaporation components automatically move away to avoid unnecessary shading that could block light for extended periods; if water replenishment is still in progress, it is prioritized to stop to prevent unnecessary water loss after the shading is removed. This logic improves the automatic adaptability under complex climatic conditions and balances the dynamic equilibrium of shading, evaporation, and water resources. It also enables dynamic and precise control of the water replenishment process, avoiding water waste or evaporator plate leakage caused by timed water replenishment; it improves the adaptability of control components to environmental changes (such as wind speed and temperature); it forms a complete closed loop of triggering and terminating water replenishment, effectively preventing excessive structural humidity and extending service life. Furthermore, it allows for personalized adjustments based on materials, such as setting different upper and lower thresholds for different porosities, providing fundamental data support for system energy and water conservation. It possesses good scalability and parameterized adjustment capabilities, making it suitable for use in combination with various evaporation materials and external environments.

[0265] The following examples are provided in specific scenarios:

[0266] Suppose there is an outdoor sunshade device installed at the entrance of a restaurant. This outdoor sunshade device is used to block sunlight from shining into the entrance during the day. The sunshade device is composed of multiple evaporation components, and there are gaps between the evaporation plates for ventilation and light transmission.

[0267] The outdoor sunshade device includes an evaporation component, a water replenishment component, and a moving component. The evaporation component includes an evaporation plate. The water replenishment component is used to replenish water to the evaporation plate. The evaporation plate is made of a porous material, allowing water from the water replenishment component to permeate to the surface of the evaporation plate. The moving component is fixedly connected to the evaporation component and is used to move the evaporation component. After controlling the water replenishment component to replenish water to the evaporation plate according to the first moisture content, it may further include:

[0268] Obtain the second thermal radiation intensity value received by the surface to be shaded or the outdoor shading device;

[0269] When the second thermal radiation intensity value is lower than the second preset thermal radiation intensity value, obtain the second temperature value of the surface to be shaded;

[0270] If the second temperature value is greater than the second temperature threshold, the moving component is activated to move the evaporation component to the shading surface and obtain the first moisture content in the evaporation plate;

[0271] If the first moisture content is less than or equal to the first preset moisture content, the water replenishment component is activated to replenish water to the evaporator plate.

[0272] When the water replenishment component is in the water replenishment state, the second moisture content in the evaporation plate is obtained;

[0273] If the second moisture content is greater than or equal to the second preset moisture content, the water replenishment component is controlled to stop replenishing water, and the second preset moisture content is greater than the first preset moisture content;

[0274] Obtain the third temperature value of the surface to be shaded;

[0275] If the third temperature value is less than or equal to the third preset temperature value, the control moving component will move the evaporating component away from the surface to be shaded.

[0276] The method in this embodiment implements a dual water replenishment judgment mechanism: one path is driven by solar radiation intensity, and the other by the temperature of the surface to be shaded. These two mechanisms complement each other, improving the system's intelligence in responding to heat loads under different scenarios. Simultaneously, it enhances the correlation with human comfort; the system no longer relies solely on external climate indicators (such as sunlight) but directly combines indoor temperature sensing needs, resulting in stronger adaptability to various usage scenarios. It can also improve energy-saving water control efficiency, ensuring timely cooling even during special periods of low sunlight but high temperature (such as high-humidity evenings or areas enclosed by heat reflection).

[0277] In some possible implementations, the moving component drives the outdoor sunshade device to rotate longitudinally, the driving mechanism drives the evaporator plate to rotate laterally, and the water replenishment component controls the water replenishment to the evaporator plate according to the first moisture content. The system may also include:

[0278] Obtain the first angle value between the evaporator plate and the sun;

[0279] If the first angle value does not meet the preset longitudinal angle range, then the longitudinal offset value to be determined for the evaporator plate is determined based on the first angle value.

[0280] The outdoor sunshade device is longitudinally flipped according to the moving part and the longitudinal offset value;

[0281] Obtain the second angle value between the evaporator plate and the sun;

[0282] If the second angle value does not meet the preset lateral angle range, then a third offset value for the evaporator plate is determined based on the second angle value.

[0283] Obtain the current wind direction and fourth wind speed experienced by the evaporator plate;

[0284] If the fourth wind speed is greater than a preset wind speed threshold, and the wind direction angle between the current wind direction and the evaporation surface of the evaporator exceeds a preset angle threshold, then the fourth offset value to be determined for the evaporator is determined based on the current wind direction.

[0285] The target offset value is determined based on the first weight corresponding to the third offset value and the second weight corresponding to the fourth offset value.

[0286] The evaporator plate is rotated according to the target offset value and the drive mechanism;

[0287] Based on the first moisture content, the water replenishment component is controlled to replenish water to the evaporation plate.

[0288] In this solution, the moving part of the outdoor sunshade device can achieve vertical flipping of the device, so as to more flexibly adjust the spatial attitude of the sunshade panel relative to the sun. Specifically, the system first obtains the first angle value between the evaporation panel and the sun, and judges whether this angle is within the preset longitudinal optimal sunshade range. If not, the longitudinal offset to be adjusted is calculated according to the current angle, and the flipping operation is performed through the moving part to adjust the sunshade device to the ideal longitudinal sunshade angle. Subsequently, the system obtains the second angle value between the evaporation panel and the sun again, and this time judges whether it is within the lateral optimal sunshade range. If it still does not meet the requirement, the offset value to be adjusted laterally is calculated according to this angle. Then, the system also collects the current wind direction and the fourth wind speed. If the wind speed is relatively high and the included angle between the wind direction and the evaporation surface of the evaporation panel exceeds the preset threshold, an additional wind direction adjustment amount needs to be calculated according to the wind direction. Finally, the system combines the two factors of the lateral angle and the wind direction, weights their respective offset values to be adjusted according to the set weights, obtains a final target offset value, and drives the mechanism to rotate the evaporation panel to this target position. Throughout the process, whenever the attitude of the evaporation panel changes, the system will re-judge and adjust the water replenishment strategy based on the first moisture content to ensure that the evaporation panel is always in an efficient evaporation and optimal sunshade state. This multi-factor linkage adjustment method effectively improves the intelligent level of the sunshade device and the adaptability of practical applications.

[0289] It should be clarified that the present invention is not limited to the specific configurations and processes described above and shown in the figures. For the sake of brevity, detailed descriptions of known methods are omitted here. In the above embodiments, several specific steps are described and shown as examples. However, the method process of the present invention is not limited to the specific steps described and shown. Those skilled in the art can make various changes, modifications, and additions, or change the order of steps, after understanding the spirit of the present invention. The functional blocks shown in the above structural block diagrams can be implemented as hardware, software, firmware, or a combination thereof. When implemented in hardware, it can be, for example, an electronic circuit, an application-specific integrated circuit (ASIC), appropriate firmware, a plug-in, a function card, etc. When implemented in software, the elements of the present invention are programs or code segments used to perform the desired tasks. The programs or code segments can be stored in a machine-readable medium or transmitted over a transmission medium or communication link via data signals carried in a carrier wave. "Machine-readable medium" can include any medium capable of storing or transmitting information. Examples of machine-readable media include electronic circuits, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, fiber optic media, radio frequency (RF) links, etc. The code segment can be downloaded via computer networks such as the Internet or intranets. It should also be noted that the exemplary embodiments mentioned in this invention describe methods or systems based on a series of steps or apparatus. However, this invention is not limited to the order of the steps described above; that is, the steps can be performed in the order mentioned in the embodiments, or in a different order, or several steps can be performed simultaneously.

[0290] It should also be noted that the exemplary embodiments mentioned in this invention describe methods or systems based on a series of steps or apparatus. However, this invention is not limited to the order of the steps described above; that is, the steps can be performed in the order mentioned in the embodiments, or in a different order, or several steps can be performed simultaneously.

[0291] The above are merely specific embodiments of the present invention. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, modules, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here. It should be understood that the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and these modifications or substitutions should all be covered within the protection scope of the present invention.

Claims

1. A control method of an outdoor sunshade apparatus, characterized by, The outdoor sun-shading device is used for shading a sun-shading surface, and comprises an evaporation component and a water supplement component, the evaporation component comprises an evaporation plate, the evaporation plate is made of rigid porous material, and the water supplement component is used for supplementing water for the evaporation plate so that water is evaporated in the evaporation plate, and the method comprises the following steps: obtaining the current time of the geographical location where the sun-shading surface is located; if the current time is within the preset cooling time period, obtaining the first heat radiation intensity value received by the evaporation plate; if the first heat radiation intensity value is greater than the first preset heat radiation intensity value, obtaining the first water content rate of the evaporation plate; controlling the water supplement component to supplement water for the evaporation plate according to the first water content rate; the method further comprises the following steps: determining whether the first water content rate is less than or equal to the first preset water content rate; if the first water content rate is less than or equal to the first preset water content rate, determining the first water absorption rate of the evaporation plate from the preset water content rate and water absorption rate mapping relationship according to the first water content rate; determining the first water spraying rate of the water supplement component according to the first water absorption rate, the first water spraying rate being less than or equal to the first water absorption rate; controlling the water supplement component to supplement water for the evaporation plate according to the first water spraying rate; the method further comprises the following steps: obtaining the first evaporation efficiency of the evaporation plate; determining the first water spraying rate of the water supplement component according to the first evaporation efficiency and the first water absorption rate, the first water spraying rate being less than or equal to the sum of the first evaporation efficiency and the first water absorption rate.

2. The method of claim 1, wherein, the method further comprises the following steps: obtaining the first wind speed received by the evaporation plate, the first surface temperature of the evaporation plate, and the first temperature difference value of the air temperature; determining the first evaporation efficiency of the evaporation plate according to the first heat radiation intensity value, the first wind speed, and the first temperature difference value.

3. The method of claim 1, wherein, the method further comprises the following steps: if the current time is within the preset cooling time period, obtaining the weather prediction information of the geographical location where the sun-shading surface is located; determining the first temperature value according to the maximum temperature of the temperature range in the weather prediction information; determining whether the first temperature value is greater than the first temperature threshold value; if the first temperature value is greater than the first preset temperature value, obtaining the first heat radiation intensity value received by the evaporation plate.

4. The method of claim 1, wherein, the method further comprises the following steps: when the water supplement component is in the water supplement state, obtaining the second water content rate in the evaporation plate; if the second water content rate is greater than or equal to the second preset water content rate, controlling the water supplement component to stop supplementing water, the second preset water content rate being greater than the first preset water content rate, and the second preset water content rate being less than the saturation water content rate of the evaporation plate.

5. The method according to any one of claims 1 to 4, characterized in that, The outdoor sun-shading device further comprises a moving component fixedly connected with the evaporation component, used for moving the evaporation component, and the controlling the water supplement component to supplement water for the evaporation plate according to the first water content rate comprises: judging whether the evaporation component is in the sun-shading surface; if the evaporation component is in the sun-shading surface, controlling the water supplement component to supplement water for the evaporation plate according to the first water content rate; if the evaporation component is not in the sun-shading surface, controlling the moving component to move the evaporation component to the sun-shading surface, and controlling the water supplement component to supplement water for the evaporation plate according to the first water content rate.

6. The method of claim 5, wherein, The outdoor sun-shading device further comprises a driving mechanism, and the upper and lower ends of the evaporation plate are connected with the driving mechanism respectively, so that the evaporation plate rotates under the driving of the driving mechanism, and the controlling the water supplement component to supplement water for the evaporation plate according to the first water content rate comprises: obtaining an angle value of the evaporation plate and the sun; if the angle value does not satisfy a preset angle range, determining a first offset value of the evaporation plate according to the angle value; obtaining a current wind direction and a second wind speed received by the evaporation plate; if the second wind speed is greater than a preset wind speed threshold value, and an included angle between the current wind direction and a wind direction of the evaporation surface of the evaporation plate exceeds a preset angle threshold value, determining a second offset value of the evaporation plate according to the current wind direction; determining a target offset value according to a first weight corresponding to the first offset value and a second weight corresponding to the second offset value; rotating the evaporation plate according to the target offset value and the driving mechanism; controlling the water supplement component to supplement water for the evaporation plate according to the first water content rate.

7. The method of claim 6, wherein, The controlling the water supplement component to supplement water for the evaporation plate according to the first water content rate comprises: judging whether the first water content rate is less than or equal to a first preset water content rate; if the first water content rate is less than or equal to the first preset water content rate, determining a first water absorption rate of the evaporation plate from a preset water content rate and water absorption rate mapping relationship according to the first water content rate; obtaining a third wind speed received by the evaporation plate, a second surface temperature of the evaporation plate and a second temperature difference value of air temperature; obtaining a second evaporation efficiency of the evaporation plate according to the first heat radiation intensity value, the third wind speed and the second temperature difference value; determining a second water spraying rate of the water supplement component according to the second evaporation efficiency and the first water absorption rate, the second water spraying rate being less than or equal to a sum of the second evaporation efficiency and the first water absorption rate; controlling the water supplement component to supplement water for the evaporation plate according to the second water spraying rate.

8. An outdoor sun shading device, characterized in that The outdoor sun-shading device is used for shading a sun-shading surface, and comprises an evaporation component and a water supplement component, the evaporation component comprises an evaporation plate, the material of the evaporation plate is rigid porous material, the water supplement component is used for supplementing water for the evaporation plate, and the water is evaporated in the evaporation plate by permeation, and the outdoor sun-shading device is used for executing the steps of the control method of the outdoor sun-shading device in any one of claims 1-7.

Images