A multifunctional photovoltaic louver energy-saving window

Abstract

The present invention discloses a multifunctional photovoltaic louver energy-saving window, which includes an outer glass, an air cavity, a multifunctional louver assembly, an inner glass, a window frame and an adjusting device; the outer glass and the inner glass are fixedly arranged on the window frame in parallel; the air cavity is located between the outer glass and the inner glass; the multifunctional louver assembly is disposed inside the air cavity; the multifunctional louver assembly includes louvers and a rotating shaft; the louvers are fixed on the rotating shaft and can rotate around the rotating shaft; the louvers are composed of blade A, blade B, blade C, blade D which are arranged at an angle of 90° in sequence and a connecting device. The present invention utilizes the multifunctional louver assembly to increase the air flow resistance in the air cavity, effectively weaken the natural convection heat transfer between the outer glass and the inner glass, and improve the heat insulation performance of the window; at the same time, by adjusting the rotation angle of the multifunctional louver assembly, functions such as sun shading in summer, heat gain in winter, anti-glare and power generation are realized, which is beneficial to the coordinated reduction of the building cooling and heating loads and lighting loads, and promotes building energy conservation.

Description

Technical Field

[0001] The present invention belongs to the technical field of building doors and windows, and particularly relates to a multifunctional photovoltaic louver energy-saving window integrating functions such as summer sunshading, winter heat gain, anti-glare, and power generation. Background Art

[0002] Windows play an important role in providing natural lighting for the interior of a building to meet people's visual needs. However, they are also a weak link in the heat insulation of the building envelope, restricting the improvement of building energy efficiency. Existing window technologies mostly adopt a structural design of double or multiple layers of glass, and increase the heat transfer thermal resistance of the window by increasing the air layer, thereby improving the heat insulation performance of the window to a certain extent. In addition, in order to reduce the solar radiation heat gain through the window in summer and reduce the probability of glare occurrence, technologies such as window sunshading or low-emissivity glass are often used. However, this will reduce the heat gain of the building in winter and cause an increase in the heat load. Therefore, there is a problem that it is difficult to balance summer sunshading and winter heat gain in building windows.

[0003] Although existing window technologies can already reflect or absorb solar radiation as needed, they do not take into account the daylighting performance of the window and cannot solve the problem that the solar radiation heat gain caused by daylighting in summer windows increases significantly. In addition, the heat insulation performance of windows still needs to be further improved. If a multifunctional energy-saving window with better heat insulation performance and integrating functions such as summer sunshading, winter heat gain, anti-glare, and power generation can be developed, it will be of great significance for promoting building energy conservation and emission reduction. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the contradiction that summer sunshading and winter heat gain in traditional building windows restrict each other, and provide a multifunctional photovoltaic louver energy-saving window integrating functions such as summer sunshading, winter heat gain, anti-glare, and power generation.

[0005] To solve the above technical problem, the technical solution proposed by the present invention is a multifunctional photovoltaic louver energy-saving window, which is characterized in that it includes an outer glass, an air cavity, a multifunctional louver assembly, an inner glass, a window frame, and an adjusting device; the outer glass and the inner glass are fixedly arranged in parallel on the window frame, the air cavity is located between the outer glass and the inner glass; the multifunctional louver assembly is disposed inside the air cavity.

[0006] The multi-functional louver assembly includes louvers and a rotating shaft; the louvers are fixed on the rotating shaft and can rotate around the rotating shaft. The louvers are composed of blade A, blade B, blade C, blade D which are arranged at an angle of 90° in sequence and a connecting device; blade A is made of a material that transmits visible light and blocks infrared radiation, such as high-transmission low-emissivity glass; blade C is composed of a material that has a high transmittance to the entire band of solar radiation, such as ordinary glass; blade B and blade D are composed of photovoltaic panels; the surface of blade B adjacent to blade A and the surface of blade D adjacent to blade A are the back sides of the photovoltaic panels, and this surface is made of a diffuse reflection material with a high reflectivity to solar radiation, such as a nano high-reflection coating; the surface of blade B adjacent to blade C and the surface of blade D adjacent to blade C are the front sides of the photovoltaic panels with a high absorption of solar radiation.

[0007] The air cavity is filled with air, inert gas or evacuated; an efficient moisture absorbent or getter is placed in the air cavity to maintain the dryness of the air cavity or keep the vacuum degree of the air cavity.

[0008] The adjusting device can adjust the rotation angle of the multi-functional louver assembly manually or electrically.

[0009] The technical idea of the present invention is as follows: (1) Using the built-in multi-functional louver assembly to divide the air cavity between the outer glass and the inner glass into multiple small spaces, increasing the air flow resistance in the air cavity, effectively weakening the natural convective heat transfer between the outer glass and the inner glass, and improving the heat insulation performance of the window; (2) In the summer sunshading condition, adjust the multi-functional louver assembly so that blade D is at the top. At this time, the multi-functional louver window can reflect solar radiation to the outdoor environment in the form of diffuse reflection, achieving sunshading, reducing the building cooling load, and avoiding light pollution to the environment; (3) In the summer daylighting condition, adjust the multi-functional louver assembly so that blade A is at the top. At this time, the multi-functional louver window blocks infrared radiation, only allows visible light to pass through and enters the indoor environment in the form of diffuse reflection, reducing the solar radiation heat gain while achieving natural daylighting, and reducing the probability of glare; (4) In the winter daylighting condition, adjust the multi-functional louver assembly so that blade C is at the top. At this time, the multi-functional louver window allows the entire wavelength of solar radiation to pass through, meeting the natural daylighting requirements; if the natural daylighting illuminance in the room is too high in winter, the multi-functional louver assembly can be adjusted so that blade B is at the top to avoid glare. In this condition, not only part of the solar radiation absorbed by louver B and louver D is converted into electric energy, but the remaining part is also stored in the air cavity in the form of heat energy, reducing the building heat load and improving the comprehensive utilization rate of solar energy. It should be noted that in practical applications, the rotation angle of the multi-functional louver assembly can be continuously adjusted to take into account the functional requirements of different application scenarios.

[0010] Compared with the prior art, the beneficial effects of a multifunctional photovoltaic louver energy-saving window of the present invention are as follows: (1) It has excellent heat insulation performance; (2) It can realize multiple functions such as summer sunshading, winter heat gain, anti-glare and power generation by adjusting the rotation angle of the multifunctional louver assembly. Therefore, the multifunctional photovoltaic louver energy-saving window of the present invention is beneficial to the coordinated reduction of building heating and cooling loads and lighting loads, and is of great significance for promoting building energy conservation and emission reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic structural diagram of an embodiment of a multifunctional photovoltaic louver energy-saving window of the present invention.

[0012] Figure 2 It is a schematic diagram of the summer sunshading condition of an embodiment of the present invention.

[0013] Figure 3 It is a schematic diagram of the summer daylighting condition of an embodiment of the present invention.

[0014] Figure 4 It is a schematic diagram of the winter heat gain and daylighting conditions of an embodiment of the present invention.

[0015] Legend:

[0016] 100 - Outer glass;

[0017] 200 - Air cavity;

[0018] 300 - Multifunctional louver assembly;

[0019] 310 - Louvers;

[0020] 311 - Blade A;

[0021] 312 - Blade B;

[0022] 313 - Blade C;

[0023] 314 - Blade D;

[0024] 315 - Connecting device;

[0025] 320 - Rotating shaft;

[0026] 400 - Inner glass;

[0027] 500 - Window frame;

[0028] 600 - Adjusting device. DETAILED DESCRIPTION OF THE INVENTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention; the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0030] Referring to Figure 1 , a multifunctional photovoltaic louver energy-saving window of the present invention includes an outer glass (100), an air cavity (200), a multifunctional louver assembly (300), an inner glass (400), a window frame (500), and an adjusting device (600); the outer glass (100) and the inner glass (400) are fixedly arranged in parallel on the window frame (500), and the air cavity (200) is located between the outer glass (100) and the inner glass (400); the multifunctional louver assembly (300) is disposed inside the air cavity (200).

[0031] The multifunctional louver assembly (300) includes louvers (310) and a rotating shaft (320); the louvers (310) are fixed on the rotating shaft (320) and can rotate around the rotating shaft (320). The louvers (310) are composed of a blade A (311), a blade B (312), a blade C (313), a blade D (314) which are arranged at an angle of 90° in sequence, and a connecting device (315); the blade A (311) is made of a material that transmits visible light and blocks infrared radiation, such as high-transmittance low-emissivity glass; the blade C (313) is composed of a material that has a high transmittance to the entire band of solar radiation, such as ordinary glass; the blade B (312) and the blade D (314) are composed of lightweight solid material photovoltaic panels; the surfaces of the blade B (312) adjacent to the blade A (311) and the surfaces of the blade D (314) adjacent to the blade A (311) are the back surfaces of the photovoltaic panels, and this surface is made of a diffuse reflection material with a high reflectivity to solar radiation, such as a nano-high reflection coating; the surfaces of the blade B (312) adjacent to the blade C (313) and the surfaces of the blade D (314) adjacent to the blade C (313) are the front surfaces of the photovoltaic panels with a high absorption of solar radiation.

[0032] The air cavity (200) is filled with air, inert gas or evacuated; an efficient moisture absorbent or getter is placed in the air cavity (200) to maintain the dryness in the air cavity (200) or to maintain the vacuum degree in the air cavity (200).

[0033] The adjusting device (600) can adjust the rotation angle of the multifunctional louver assembly (300) manually or electrically.

[0034] In the summer sunshading condition, referring to Figure 2, adjust the multi-functional louver assembly so that the blade D (314) is at the uppermost position. At this time, the blades B (312) and D (314) reflect solar radiation to the outdoor environment in the form of diffuse reflection, realizing the sunshade function, reducing the building cooling load, and avoiding light pollution to the outdoor environment.

[0035] In the summer daylighting condition, refer to Figure 3 , adjust the multi-functional louver assembly so that the blade A (311) is at the uppermost position. At this time, the blade A (311) blocks the infrared radiation, only allowing visible light to pass through, and enters the indoor environment through the diffuse reflection of the louver B (312) and the louver D (314), achieving the purposes of natural daylighting, avoiding glare, and reducing solar radiation heat gain.

[0036] In the winter daylighting condition, refer to Figure 4 , adjust the multi-functional louver assembly so that the blade C (313) is at the uppermost position. At this time, the full-wavelength solar radiation can pass through the blade C (313) and enter the indoor environment, meeting the natural daylighting requirements; if the indoor natural daylighting illuminance is too high in winter, the multi-functional louver assembly can be adjusted so that the blade B is at the uppermost position to avoid glare. In this condition, not only part of the solar radiation absorbed by the louver B (312) and the louver D (314) is converted into electric energy, but the remaining part is also stored in the air cavity in the form of heat energy, reducing the building heating load and improving the comprehensive utilization rate of solar energy.

Claims

1. A multifunctional photovoltaic louver energy-saving window, characterized in that, It includes an outer glass (100), an air cavity (200), a multi-functional louver assembly (300), an inner glass (400), a window frame (500) and an adjusting device (600); the outer glass (100) and the inner glass (400) are fixedly arranged on the window frame (500) in parallel; the air cavity (200) is located between the outer glass (100) and the inner glass (400); the multi-functional louver assembly (300) is built in the air cavity (200); the multi-functional louver assembly (300) includes louvers (310) and a rotating shaft (320); the louvers (310) are fixed on the rotating shaft (320) and can rotate around the rotating shaft (320); the louvers (310) are composed of blade A (311), blade B (312), blade C (313), blade D (314) which are arranged at an angle of 90° in sequence and a connecting device (315); the blade A (311) is made of a high-transmittance low-emissivity glass that transmits visible light and blocks infrared radiation; the blade C (313) is made of ordinary glass with high transmittance to all-band solar radiation; the blade B (312) and the blade D (314) are composed of photovoltaic panels; the surfaces of the blade B (312) adjacent to the blade A (311) and the surfaces of the blade D (314) adjacent to the blade A (311) are the back surfaces of the photovoltaic panels, and this surface is made of a diffuse reflection material with high reflectivity to solar radiation - a nano high-reflection coating; the surfaces of the blade B (312) adjacent to the blade C (313) and the surfaces of the blade D (314) adjacent to the blade C (313) are the front surfaces of the photovoltaic panels with high absorption of solar radiation; the multi-functional photovoltaic louver energy-saving window is characterized in that the air cavity (200) is filled with air, inert gas or evacuated; an efficient moisture absorbent or getter is placed in the air cavity (200) to maintain the dryness in the air cavity (200) or keep the vacuum degree in the air cavity (200).

2. The multifunctional photovoltaic louver energy-saving window according to claim 1, characterized in that, The adjusting device (600) can adjust the rotation angle of the multi-functional louver assembly (300).

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