Reflective photovoltaic sunshade device

Abstract

This invention belongs to the field of building energy conservation and discloses a reflective photovoltaic shading device installed inside a window opening at a height of 300-1000mm from the top of the window opening. It includes a supporting purlin, a connecting shaft assembly, a shading assembly, and a control assembly. The two ends of the supporting purlin are fixed to the inner wall of the window opening. The shading assembly is rotatably connected to the supporting purlin via the connecting shaft assembly. The control assembly acts on the connecting shaft assembly to control the rotation of the shading assembly to adjust its tilt angle. The shading assembly includes a photovoltaic panel, a reflector, and a shading plate arranged sequentially from top to bottom. This invention integrates the photovoltaic panel, reflector, and shading plate into a shading assembly. The tilt angle of the shading assembly can be adjusted by the control assembly, allowing the shading plate to reduce strong light near the window, the reflector to ensure uniform illuminance inside the window, and the reflected sunlight to be reused by the photovoltaic panel to generate electricity, thus improving photovoltaic power generation efficiency. This is of great significance for the utilization of renewable energy on building facades.

Description

Technical Field

[0001] This invention relates to the field of building energy conservation, and in particular to a reflective photovoltaic shading device. Background Technology

[0002] As a major source of carbon emissions, the construction sector requires close attention. While shading is an effective way to reduce solar radiation, it is often not adopted by owners and designers because it affects the appearance of building facades. The lack of shading forces the use of heat-reflective glass in buildings, resulting in higher indoor heat loads in summer. This hinders the reduction of building operating energy consumption, leading to unnecessary carbon emissions and contradicting current energy conservation and carbon reduction principles.

[0003] Currently, most existing sunshades are directly installed outdoors and have a single function, usually only providing sun shading, which is not very practical. Fixed sunshades can only achieve the function of sun shading, and may even affect the indoor lighting when sun shading is not needed; movable sunshades can switch between sun shading and lighting functions, but usually cannot achieve both effects at the same time.

[0004] Photovoltaic (PV) power generation fully utilizes solar radiation energy, and is flexible in installation, easy to maintain, and widely applicable, facilitating energy-saving renovations of both new and old buildings. Currently, PV power generation is mainly concentrated on rooftops. However, with the increasing prevalence of high-rise residential buildings, the limited roof area makes it difficult to meet the huge electricity demand. Residential facades, with their ample surface area, represent a key future application area for PV. Current facade PV power generation methods include PV curtain walls, PV exterior walls, and PV shading. PV shading typically uses crystalline silicon photovoltaic (PV) panels, which fully utilize solar radiation energy. The opaque nature of crystalline silicon PV panels replaces traditional shading boards to achieve a shading effect. PV shading boards can block some solar radiation, reducing the heat from direct sunlight. Simultaneously, PV power generation modules convert solar radiation energy into electrical energy for the building's main structure, reducing building energy consumption. However, crystalline silicon PV panels generate a large amount of waste heat during power generation, which radiates into the interior, negatively impacting indoor comfort, and their power generation efficiency is not high. Therefore, a more comprehensive shading structure is urgently needed to address these issues. Summary of the Invention

[0005] The present invention aims to solve the technical problems existing in the prior art. To this end, the present invention provides a more comprehensive reflective photovoltaic shading device.

[0006] The technical solution adopted by this invention to solve its technical problem is:

[0007] A reflective photovoltaic shading device is provided, installed inside a window opening at a height of 300-1000mm from the top of the window opening. The shading device includes a supporting purlin, a connecting shaft assembly, a shading component, and a control assembly. The two ends of the supporting purlin are fixed to the inner wall of the window opening. The shading component is rotatably connected to the supporting purlin via the connecting shaft assembly. The control assembly acts on the connecting shaft assembly to control the rotation of the shading component to adjust its tilt angle. The shading component includes a photovoltaic panel, a reflector, and a shading plate arranged sequentially from top to bottom.

[0008] In a preferred embodiment of the present invention, the sunshade assembly further includes a frame and square pads, the reflector and the sunshade are fixed in the frame, a plurality of square pads are disposed on the outer edge of the reflector, and the photovoltaic panel is disposed on the square pads.

[0009] Preferably, the width of the sunshade component is the same as the width of the window frame.

[0010] In a preferred embodiment of the present invention, the connecting shaft assembly includes a first sleeve disposed on a supporting purlin, a second sleeve disposed on a sunshade assembly, and a round steel pipe penetrating the first sleeve and the second sleeve, wherein the round steel pipe is welded to the second sleeve.

[0011] Preferably, the supporting purlin, frame, sleeve one and sleeve two are made of aluminum alloy.

[0012] In a preferred embodiment of the present invention, the control component is a manual operation component, comprising two sets located at both ends of the support purlin. Each set includes a connecting rod, an operating push rod, and an operating handle. The middle part of the operating push rod is hinged to the support purlin, and the end of the push rod near the connecting shaft assembly is hinged to the connecting rod. The connecting rod is rotatably connected to the inner wall of the round steel pipe via a pin. The end of the operating push rod protruding from the support purlin is provided with a limiting groove having multiple locking positions. The operating handle is movably disposed within the limiting groove, and the tilt angle of the sunshade component is adjusted by the operating handle in different locking positions within the limiting groove.

[0013] Preferably, the limiting slot has at least four positions, which are used to control the tilt angle of the sunshade component at 0°, 30°, 60° and 90° respectively.

[0014] In another preferred embodiment of the present invention, the control component is an electric operating component, including a motor disposed in the support purlin, a wheel disposed on the motor shaft, and a connecting rod hinged to the end face of the wheel. The connecting rod is rotatably connected to the inner wall of the round steel pipe by a pin.

[0015] Preferably, there are two motors, and the two motors drive the round steel pipe synchronously.

[0016] In a preferred embodiment of the present invention, the light-shielding plate is made of an opaque, heat-resistant rigid plate.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] This invention adopts a prefabricated construction method, installed inside window openings. Compared to traditional movable shading, construction is more convenient, and old photovoltaic panels can be easily replaced. Furthermore, compared to traditional movable external shading, integrating photovoltaic panels, reflectors, and shading panels into a single shading assembly allows for adjustment of the shading assembly's tilt angle. This enables the shading panels to reduce strong light near windows, the reflectors to ensure uniform illuminance inside, and the reflected sunlight to be reused by the photovoltaic panels for power generation, improving photovoltaic power generation efficiency. This is of great significance for the utilization of renewable energy in building facades. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0020] Figure 1 This is a schematic diagram of the installation of the reflective photovoltaic shading device provided by the present invention in a window opening;

[0021] Figure 2 yes Figure 1 A cross-sectional view of the provided sunshade assembly;

[0022] Figure 3 This is an exploded view of the installation of the reflective photovoltaic shading device provided in Embodiment 1 of the present invention;

[0023] Figure 4 yes Figure 3 A schematic diagram of the installation structure of the provided control components;

[0024] Figure 5 This is an exploded view of the installation of the reflective photovoltaic shading device provided in Embodiment 2 of the present invention;

[0025] Figure 6 This is a schematic diagram of the sunshade device provided in Embodiment 1 of the present invention under a 0° tilt angle condition;

[0026] Figure 7 yes Figure 6 The indoor lighting conditions when the provided shading device is in operation at a 0° tilt angle;

[0027] Figure 8 This is a schematic diagram of the sunshade device provided in Embodiment 1 of the present invention under a 30° tilt angle condition;

[0028] Figure 9 yes Figure 8 The indoor lighting conditions when the provided shading device is in operation at a 30° tilt angle;

[0029] Figure 10 A schematic diagram of the sunshade device provided in Embodiment 1 of the present invention under a 60° tilt angle condition;

[0030] Figure 11 yes Figure 10 The indoor lighting conditions when the provided shading device is tilted at a 60° angle. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Example 1

[0033] This embodiment provides a reflective photovoltaic shading device, which is installed inside a window opening, as shown in the attached figure. Figure 1 As shown, the preferred height is 300-1000mm from the top of the window opening. The sunshade device includes a supporting purlin 1, a connecting shaft assembly 2, a sunshade assembly 3, and a control assembly 4, wherein:

[0034] The two ends of the supporting purlin 1 are fixed to the inner wall of the window opening, serving as the installation base for the entire sunshade device. Specifically, it is installed on the outer side of the window frame, without affecting the normal installation and use of the window.

[0035] The sunshade component 3 is rotatably connected to the support purlin 1 via the connecting shaft component 2; preferably, the width of the sunshade component 3 is the same as the width of the window frame inside the window opening.

[0036] The control component 4 acts on the connecting shaft assembly 2 to control the rotation of the sunshade component 3 to adjust the tilt angle of the sunshade component. The control component can control the sunshade component to adjust its tilt angle at different times of the day to adjust the amount of light entering the room.

[0037] Preferred options are listed below. Figure 2As shown, the sunshade assembly 3 includes a photovoltaic panel 3.1, a reflector 3.2, a shader 3.3, a frame 3.4, and square pads 3.5. The photovoltaic panel 3.1, reflector 3.2, and shader 3.3 are arranged sequentially from top to bottom within the frame 3.4. Specifically, the reflector 3.2 and shader 3.3 are fixed within the frame 3.4, multiple square pads 3.4 are distributed along the outer edge 3.2 of the reflector, and the photovoltaic panel 3.1 is mounted on the square pads 3.1. This embodiment integrates the photovoltaic panel, reflector, and shader into a single unit. The tilt angle of the sunshade assembly can be adjusted via a control component, allowing the shader to reduce strong light near the window, the reflector to ensure uniform illuminance inside, and the reflected sunlight to be reused by the photovoltaic panel for power generation, thus improving photovoltaic power generation efficiency. Preferably, the light-shielding plate 3.3 in this embodiment is an opaque, heat-resistant rigid plate, preferably an opaque polycarbonate plate.

[0038] Preferred options are listed below. Figure 3 Or attached Figure 5 As shown, the connecting shaft assembly 2 includes a first sleeve 2.1 disposed on the supporting purlin 1, a second sleeve 2.2 disposed on the sunshade assembly 3, and a round steel pipe 2.3 penetrating the first sleeve 2.1 and the second sleeve 2.2, and the round steel pipe 2.3 is welded to the second sleeve 2.2. In this embodiment, the connecting shaft assembly is used to realize the rotation of the sunshade assembly.

[0039] Preferably, in this embodiment, the supporting purlin 1, frame 3.4, tube sleeve 1 2.1 and tube sleeve 2.2 are all made of aluminum alloy. Aluminum alloy is lightweight and has high strength, which improves the service life of the sunshade device.

[0040] Preferred options are listed below. Figure 3 and attached Figure 4 As shown, the control component 4 is a manually operated component, comprising two sets located at both ends of the supporting purlin 1. Each set includes a connecting rod 4.1, an operating push rod 4.2, and an operating handle 4.3. The middle part of the operating push rod 4.2 is hinged to the supporting purlin 1, and the end of the push rod 4.2 near the connecting shaft assembly 2 is hinged to the connecting rod 4.1. The connecting rod 4.1 is rotatably connected to the inner wall of the round steel pipe 2.3 via a pin. The end of the operating push rod 4.2 protruding from the supporting purlin 1 is provided with a limiting groove 4.2.1 with multiple locking positions. The operating handle 4.3 is movably disposed within the limiting groove 4.2.1, and the tilt angle of the sunshade component is adjusted by moving the operating handle to different locking positions within the limiting groove. The connection between the operating handle and the operating push rod is as follows: one end of the operating handle is provided with a plug for inserting into the locking position, and the end of the plug is provided with a limiting plate to prevent the operating handle from dislodging from the limiting groove. Preferably, the limiting slot 4.2.1 has at least 4 locking positions, so that the operating handle can keep the sunshade component stable at tilt angles of 0°, 30°, 60° and 90° respectively in the 4 locking positions.

[0041] In practice, during periods of high solar altitude, such as noon, adjust the operating handle to the innermost position within the limiting slot. At this time, the operating handle is flush with the window frame, limiting the sunshade component and maintaining the tilt angle of the sunshade device at 0°, as shown in the attached diagram. Figure 6 As shown, this design, while providing shade, reflects sunlight into the interior, supplementing indoor lighting with diffused light, as illustrated in the attached diagram. Figure 7 As shown;

[0042] When the sun's altitude angle is moderate, adjust the operating handle to the position that allows the sunshade device to be tilted at 30°, ensuring the best sunshade effect while also taking into account the reflective properties, as shown in the attached diagram. Figure 8 As shown in the attached diagram, the indoor lighting is as follows. Figure 9 As shown;

[0043] During periods of low sun altitude, such as when the sun is shining from the east or west, adjust the operating handle to the position that allows the sunshade device to tilt at 60° to achieve maximum shading while allowing a small amount of sunlight to enter, ensuring adequate indoor illumination. (See attached image.) Figure 10 As shown in the attached diagram, the indoor lighting is as follows. Figure 11 As shown.

[0044] The operating handle can also be adjusted to the outermost position to adjust the tilt angle of the sunshade device to 90°, achieving complete sunshade of the lower part of the window, allowing light to only enter from a small area of ​​the window.

[0045] Example 2

[0046] The only difference between this embodiment and Embodiment 1 is the control component. In this embodiment, the control component 4 is an electrically operated component, as shown in the attached diagram. Figure 5 As shown, the shading assembly includes a motor 4.3' housed within the supporting purlin 1, a rotating wheel 4.2' mounted on the motor shaft, and a connecting rod 4.1 hinged to the end face of the rotating wheel. The connecting rod 4.1 is rotatably connected to the inner wall of the round steel tube 2.3 via a pin. This embodiment achieves stepless adjustment of any angle by driving the rotation of the sunshade assembly with a motor, while also creating conditions for automated control, making operation simpler and more practical.

[0047] Preferably, in this embodiment, two motors 4.3' are provided, and the two motors 4.3' synchronously drive the round steel pipe 2.3. The dual-motor control of the sunshade assembly results in more reasonable force distribution and more stable control.

[0048] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A reflective photovoltaic shading device, characterized in that: Installed inside the window opening, at a height of 300-1000mm from the top of the window opening; the sunshade device includes supporting purlins, connecting shaft assemblies, sunshade components, and control components, wherein: The two ends of the supporting purlin are fixed to the inner wall of the window opening; The sunshade assembly is rotatably connected to the support purlin via a connecting shaft assembly; The control component acts on the connecting shaft assembly to control the rotation of the sunshade assembly to adjust the tilt angle of the sunshade assembly; The sunshade assembly includes a photovoltaic panel, a reflector, a shader, a frame, and square pads. The photovoltaic panel, reflector, and shader are arranged sequentially from top to bottom. The reflector and shader are fixed within the frame. Multiple square pads are disposed along the outer edge of the reflector. The photovoltaic panel is mounted on the square pads. The reflector is used to reflect sunlight to the indoor ceiling and the back surface of the photovoltaic panel. The shader is used to reduce strong light near the window.

2. The reflective photovoltaic shading device according to claim 1, characterized in that: The width of the sunshade component is the same as the width of the window frame.

3. The reflective photovoltaic shading device according to claim 1, characterized in that: The connecting shaft assembly includes a first sleeve disposed on the supporting purlin, a second sleeve disposed on the sunshade assembly, and a round steel pipe passing through the first sleeve and the second sleeve, wherein the round steel pipe is welded to the second sleeve.

4. The reflective photovoltaic shading device according to claim 3, characterized in that: The supporting purlins, frame, sleeve one, and sleeve two are made of aluminum alloy.

5. The reflective photovoltaic shading device according to claim 3, characterized in that: The control component is a manually operated component, comprising two sets located at both ends of the support purlin. Each set includes a connecting rod, an operating push rod, and an operating handle. The middle part of the operating push rod is hinged to the support purlin, and the end of the push rod near the connecting shaft assembly is hinged to the connecting rod. The connecting rod is rotatably connected to the inner wall of the round steel pipe via a pin. The end of the operating push rod protruding from the support purlin is provided with a limiting groove with multiple locking positions. The operating handle is movably disposed within the limiting groove, and the tilt angle of the sunshade component is adjusted by moving the operating handle to different locking positions within the limiting groove.

6. The reflective photovoltaic shading device according to claim 5, characterized in that: The limiting slot has at least four positions, which are used to control the tilt angle of the sunshade component at 0°, 30°, 60° and 90°.

7. The reflective photovoltaic shading device according to claim 3, characterized in that: The control component is an electric operating component, including a motor installed in the support purlin, a wheel installed on the motor shaft, and a connecting rod hinged to the end face of the wheel. The connecting rod is rotatably connected to the inner wall of the round steel pipe through a pin.

8. The reflective photovoltaic shading device according to claim 7, characterized in that: The system has two motors, which drive the round steel pipe synchronously.

9. The reflective photovoltaic shading device according to any one of claims 1 to 8, characterized in that: The light-shielding plate is made of an opaque, heat-resistant rigid board.

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