阅读说明：本技术 一种光伏发电装置 (Photovoltaic power generation device ) 是由 李兴财 王娟 屈高强 于 2019-11-28 设计创作，主要内容包括：本发明公开了一种光伏发电装置,包括至少一个光伏发电单元；光伏发电单元包括壳体、透光组件、反光组件和第一光伏电池组件；壳体的一侧设置有开口,且透光组件设置在开口处；反光组件设置在壳体的底部,并与壳体的底部所在的水平面之间形成夹角θ<Sub>0</Sub>；第一光伏电池组件设置于壳体的顶部与反光组件相对的位置；并且,透过透光组件的入射光经反光组件反射后至第一光伏电池组件上。本发明提供的光伏发电装置,实现对太阳光的高效利用,同时相对封闭的空间保护光伏电池组件使其表面不产生污损,便于维护。(The invention discloses a photovoltaic power generation device, which comprises at least one photovoltaic power generation unit; the photovoltaic power generation unit comprises a shell, a light transmitting component, a light reflecting component and a first photovoltaic cell component; an opening is formed in one side of the shell, and the light-transmitting component is arranged at the opening; the reflecting component is arranged at the bottom of the shell and forms an included angle theta with the horizontal plane where the bottom of the shell is located 0 (ii) a The first photovoltaic cell assembly is arranged at the top of the shell and opposite to the reflecting assembly; and incident light penetrating through the light transmitting assembly is reflected by the light reflecting assembly and then reaches the first photovoltaic cell assembly. The photovoltaic power generation device provided by the invention realizes high-efficiency utilization of sunlight, and simultaneously protects the photovoltaic cell component from being stained on the surface of the photovoltaic cell component in a relatively closed space, so that the photovoltaic power generation device is convenient to maintain.)

1. A photovoltaic power generation device is characterized by comprising at least one photovoltaic power generation unit;

the photovoltaic power generation unit comprises a shell, a light transmitting component, a light reflecting component and a first photovoltaic cell component;

an opening is formed in one side of the shell, and the light-transmitting component is arranged at the opening;

the light reflecting component is arranged at the bottom of the shell and forms an included angle theta with a horizontal plane where the bottom of the shell is located₀(ii) a The first photovoltaic cell assembly is arranged at the top of the shell and opposite to the reflecting assembly; and the number of the first and second electrodes,

incident light penetrating through the light transmitting assembly is reflected by the light reflecting assembly and then reaches the first photovoltaic cell assembly.

2. The photovoltaic power generation device according to claim 1, wherein the photovoltaic power generation unit further comprises a second photovoltaic cell module disposed in the housing opposite to the light transmissive module to receive the light reflected by the light reflective module.

3. The photovoltaic power generation device of claim 1, wherein the included angle θ₀Comprises the following steps:

wherein H₀To use the midday solar altitude of the ground.

4. The photovoltaic power generation apparatus of claim 3, wherein the first photovoltaic cell assembly is at an angle β with respect to a horizontal plane in which the top of the housing is located, and 0 ° ≦ β ≦ θ₀β is fixed or adjustable.

5. The photovoltaic power generation device of claim 4, wherein the housing is of a rectangular or square structure; the light reflecting component is arranged at the bottom of the shell, one end of the light reflecting component is fixedly connected with the bottom of one side of the shell, and the other end of the light reflecting component is fixedly connected with the other side of the shell opposite to the light transmitting component; the first photovoltaic cell assembly is fixedly connected to the top of the shell.

6. Photovoltaic power generation device according to claim 5, characterized in that the height H of the housing is:

H＝L(tgθ₀+tgH₀)

wherein L is the width between the side surface of the light-transmitting component in the shell and the other opposite side surface, and H₀At noon solar altitude, theta, for using the ground₀Is the included angle formed by the reflecting component and the horizontal plane where the bottom of the shell is located.

7. The photovoltaic power generation device of claim 5, further comprising a third photovoltaic module disposed within the housing on a side adjacent to the light transmissive component; the light reflecting assembly is divided into a main body section and an adjusting section along the horizontal extending direction of the light transmitting assembly, and the adjusting section is arranged on one side, far away from the third photovoltaic assembly, of the shell; the horizontal plane where the adjusting section and the main body section are located forms an included angle phi; wherein the included angle phi is adjustable, and the included angle phi is:

Φ＝90-15×(ST-12)

wherein ST is the intensity of solar radiation of the using ground reaching 50W/m²True solar time.

8. The photovoltaic power generation device of claim 7, wherein the length W of the adjustment segment along the direction in which the light transmission component extends horizontally₀Comprises the following steps:

W₀＝1/5×W

wherein W is the length of the light reflecting component along the horizontal extending direction of the light transmitting component.

9. A photovoltaic power generation device according to any of claims 5-8, characterized in that the photovoltaic power generation device comprises at least two photovoltaic power generation units; the photovoltaic power generation units are arranged adjacently; and the number of the first and second electrodes,

wherein the bottom of the housing of one of the photovoltaic power generation units is connected to the top of the housing of the other of the photovoltaic power generation units.

10. The photovoltaic power generation device of any one of claims 1-9, wherein the light transmissive component is a high light transmissive glass; the light reflecting component is a glass light reflecting lens.

Technical Field

The invention relates to the technical field of photovoltaic power generation, in particular to a photovoltaic power generation device.

Background

Solar power generation is the most mature new energy power generation method in the prior art, and the solar photovoltaic power generation technology is the most widely applied solar energy application technology which is most suitable for popularization and application at present. Photovoltaic power generation is a technology of directly converting light energy into electric energy by using the photovoltaic effect of a semiconductor interface. The efficient photovoltaic power generation device can obviously improve the solar power generation efficiency. The current photovoltaic power generation device mainly adopts a photovoltaic cell with an inclined flat plate structure, and sunlight directly radiates on the photovoltaic cell to obtain radiant quantity so as to generate power. The photovoltaic power generation device with the structure greatly occupies a space position due to the photovoltaic cell with the inclined flat plate structure, and has limited utilization of sunlight; further, in the photovoltaic power generation device with the structure, the surface of the photovoltaic cell is easy to be stained, so that the power generation efficiency is influenced, and therefore, the surface cleaning is required to be carried out irregularly, and the operation cost is obviously increased.

Disclosure of Invention

The invention aims to solve the problems that the existing photovoltaic power generation device has limited utilization of sunlight, the surface is easy to be stained to influence the power generation efficiency, and the cleaning is troublesome. The photovoltaic power generation device is provided with a shell, a reflecting component at the bottom of the shell is utilized to reflect solar radiation light irradiated on the reflecting component to a photovoltaic cell component opposite to the reflecting component, partial light is reflected and irradiated on the reflecting component again, and then secondary reflection is carried out on the photovoltaic cell component, so that the efficient utilization of sunlight is realized; the shell of the device forms a relatively closed space, and the surface of the photovoltaic cell component is protected and is not easy to stain.

In order to solve the above problems, the present invention discloses a photovoltaic power generation apparatus, comprising at least one photovoltaic power generation unit; the photovoltaic power generation unit comprises a shell, a light transmitting component, a light reflecting component and a first photovoltaic cell component; an opening is formed in one side of the shell, and the light-transmitting component is arranged at the opening; the reflecting component is arranged at the bottom of the shell and forms an included angle theta with the horizontal plane where the bottom of the shell is located₀(ii) a The first photovoltaic cell assembly is arranged at the top of the shell and opposite to the reflecting assembly; and incident light penetrating through the light transmitting assembly is reflected by the light reflecting assembly and then reaches the first photovoltaic cell assembly.

By adopting the scheme, when incident light of solar radiation enters the device through the light-transmitting component and is incident to the light-reflecting component, the incident light irradiates a first photovoltaic cell component arranged on a reflected light reflection path after being reflected, the light is absorbed and converted into electric energy by the first photovoltaic cell component, part of the light is reflected and irradiates the light-reflecting component again, and then the reflected light irradiates the first photovoltaic cell component through secondary reflection, so that the high-efficiency utilization of the light is realized; in addition, the device is provided with the shell to form a relatively closed space, so that the surface of the photovoltaic cell assembly is protected and is not easy to stain.

According to another specific embodiment of the present invention, in the photovoltaic power generation apparatus disclosed in the embodiment of the present invention, the photovoltaic power generation unit further includes a second photovoltaic cell module, and the second photovoltaic cell module is disposed in the casing at a position opposite to the light-transmitting module to receive the light reflected by the light-reflecting module.

By adopting the technical scheme, the incident angle reflected to the first photovoltaic cell assembly through the reflecting assembly is changed due to the fact that the solar altitude angle is reduced at some time, scattered light is generated, and the utilization rate of the reflected light is reduced; the second photovoltaic cell assembly is installed and arranged opposite to the light transmission assembly, reflected light irradiates the second photovoltaic cell assembly of the first photovoltaic cell assembly at the same time, scattered light is further utilized, and the utilization rate of the reflected light is improved.

According to another specific embodiment of the present invention, the photovoltaic power generation apparatus disclosed in the embodiments of the present invention, the reflecting component forms an included angle θ with a horizontal plane on which the bottom of the housing is located₀Comprises the following steps:

wherein H₀To use the midday solar altitude of the ground.

By adopting the technical scheme, the included angle theta is set according to the solar altitude at noon of the applicable place₀When the solar altitude is H₀The incident light through the device to the printing opacity subassembly entering device of sunny side to incidenting to reflection of light subassembly, shine the first photovoltaic cell subassembly that is located the device upside after the light is through the reflection, the contained angle that sets up makes most absorbed by first photovoltaic cell, and the reflector is shone once more in the reflection partially takes place, and then shines the first photovoltaic cell piece in top through the secondary reflection again to realize the high-efficient utilization of light.

According to another specific embodiment of the present invention, the photovoltaic power generation apparatus, the first photovoltaic cell module and the top of the housing are disposed in the photovoltaic power generation apparatusThe included angle between the horizontal planes is β, and theta is more than or equal to 0 degree and less than or equal to β degrees₀β is fixed or adjustable.

By adopting the scheme, the first photovoltaic cell assembly is parallel to or adjusts the included angle between the horizontal plane where the top of the shell is located according to the light reflected by the light reflecting assembly, so that the utilization rate of the reflected light is improved. And when the solar altitude angle is reduced at some time, the incident angle reflected to the first photovoltaic cell assembly is changed, the incident angle is adjusted by adjusting the included angle between the first photovoltaic cell assembly and the horizontal plane where the top of the shell is located, and the utilization rate of reflected light is improved.

According to another specific embodiment of the present invention, the photovoltaic power generation apparatus disclosed in the embodiments of the present invention, the housing has a rectangular parallelepiped or square structure; the light reflecting component is arranged on the bottom in the shell, one end of the light reflecting component is fixedly connected with the bottom of one side of the shell, and the other end of the light reflecting component is fixedly connected with the other side surface of the shell opposite to the light transmitting component; the first photovoltaic cell assembly is fixedly connected in the top portion.

By adopting the technical scheme, the device has stable integral structure and regular shape. A single photovoltaic power generation unit can be used as one module; or a plurality of photovoltaic power generation units can be combined into a multi-module device, so that the application of the multi-module device is facilitated.

According to another embodiment of the present invention, the photovoltaic power generation apparatus disclosed in the embodiment of the present invention, the height H of the housing 40 is:

H＝L(tgθ₀+tgH₀)

wherein L is the width between the side where the light-transmitting component is located in the shell and the other opposite side, H₀At noon solar altitude, theta, for using the ground₀Is the included angle formed by the reflecting component and the horizontal plane where the bottom of the shell is positioned.

By adopting the technical scheme, the solar altitude H at noon of the land is comprehensively used according to the width L of the bottom of the shell₀And theta₀And the height H of the shell is set, so that the first photovoltaic cell component obtains the maximum solar total radiant energy all day, and the solar radiant light energy utilization rate is improved.

According to another specific embodiment of the present invention, the photovoltaic power generation apparatus disclosed in the embodiment of the present invention, according to another specific embodiment of the present invention, further includes a third photovoltaic module, the third photovoltaic module is disposed on a side surface of the housing adjacent to the light-transmitting module; the light reflecting assembly is divided into a main body section and an adjusting section along the horizontal extending direction of the light transmitting assembly, and the adjusting section is arranged on one side, far away from the third photovoltaic assembly, of the shell; the horizontal plane where the adjusting section and the main body section are located forms an included angle phi; the included angle phi is adjustable and is:

Φ＝90-15×(ST-12)

wherein ST is the intensity of solar radiation of the using ground reaching 50W/m²True solar time.

By adopting the scheme, when the deviation of the incident light from the normal direction of the light-transmitting component is large, the incident light is reflected by the light-reflecting component 10 and then possibly falls on the side surface of the device, and therefore the photovoltaic component is also arranged on the side surface of the device. In addition, the end part of the reflecting component is provided with an extending end, and an included angle phi formed between the extending end and the horizontal plane can be adjusted according to time, so that the angle of the reflecting light incident to the third photovoltaic component can be adjusted, and the utilization rate of the reflecting light is improved.

According to another embodiment of the invention, the photovoltaic power generation device disclosed in the embodiment of the invention has the length W of the adjusting section along the horizontal extending direction of the light-transmitting component₀Comprises the following steps:

W₀＝1/5×W

wherein, W is the length of the reflecting component along the horizontal extending direction of the light-transmitting component.

By adopting the scheme, the light reflecting component is mainly used for reflecting light to the first photovoltaic component, and part of the light reflecting component is used for reflecting the light to the third photovoltaic component, so that the distribution is reasonable, and the utilization rate of the reflected light is improved.

According to another specific embodiment, the photovoltaic power generation apparatus disclosed in the embodiments of the present invention includes at least two photovoltaic power generation units; each photovoltaic power generation unit is arranged adjacently; and the bottom of the housing of one of the photovoltaic power generation units is connected with the top of the housing of the other photovoltaic power generation unit.

By adopting the scheme, the photovoltaic power generation units are connected with each other by the bottoms and the tops to form the multi-module device, and the whole structure is neat. The photovoltaic power generation device disclosed by the embodiment can be applied to a building curtain wall and is installed on a building sunny side.

According to another specific embodiment of the present invention, the embodiment of the present invention discloses a photovoltaic power generation apparatus, wherein the light-transmitting component is high-light-transmitting glass; the light reflecting component is a glass light reflecting lens.

By adopting the technical scheme, the light transmittance of the high-light-transmittance glass can reach more than 91.5%, the reflectivity of the glass reflecting lens can reach 100%, and the utilization rate of solar radiation light can be improved.

The photovoltaic power generation device provided by the invention realizes high-efficiency utilization of sunlight, and simultaneously protects the photovoltaic cell component from being stained on the surface of the photovoltaic cell component in a relatively closed space, so that the photovoltaic power generation device is convenient to maintain.

Drawings

FIG. 1 is a side cross-sectional view of one embodiment of a photovoltaic power plant of the present invention;

FIG. 2 is a side cross-sectional view of an embodiment of the photovoltaic power plant of the present invention including a second photovoltaic cell assembly;

FIG. 3 is a front cross-sectional view of one embodiment of a photovoltaic power plant of the present invention;

fig. 4 is a side cross-sectional view of an embodiment of the photovoltaic power generation apparatus of the present invention including at least two photovoltaic power generation units.

Reference numerals:

10: a light reflecting component; 11: a main body section; 12: an adjustment section; 20: a light transmissive component; 31: a first photovoltaic cell assembly; 32: a second photovoltaic cell assembly; 33: a third photovoltaic cell assembly; 40: a housing.

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure. While the invention will be described in conjunction with the preferred embodiments, it is not intended that features of the invention be limited to these embodiments. On the contrary, the invention is described in connection with the embodiments for the purpose of covering alternatives or modifications that may be extended based on the claims of the present invention. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The invention may be practiced without these particulars. Moreover, some of the specific details have been left out of the description in order to avoid obscuring or obscuring the focus of the present invention. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

It should be noted that in this specification, like reference numerals and letters refer to like items in the following drawings, and thus, once an item is defined in one drawing, it need not be further defined and explained in subsequent drawings.

In the description of the present embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that are conventionally placed when the products of the present invention are used, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements indicated must have specific orientations, be configured in specific orientations, and operate, and thus, should not be construed as limiting the present invention.

The terms "first," "second," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

In the description of the present embodiment, it should be further noted that, unless explicitly stated or limited otherwise, the terms "disposed," "connected," and "connected" are to be interpreted broadly, e.g., as a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present embodiment can be understood in specific cases by those of ordinary skill in the art.

In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The embodiment of the invention discloses a photovoltaic power generation device, which comprises at least one photovoltaic power generation unit as shown in figures 1-3; the photovoltaic power generation unit comprises a shell 40, a light-transmitting component 20, a light reflecting component 10 and a first photovoltaic cell component 31; an opening is formed in one side of the shell 40, and the light-transmitting component 20 is arranged at the opening; the light reflecting member 10 is disposed at the bottom of the housing 40 and forms an included angle theta with a horizontal plane on which the bottom of the housing 40 is located₀(ii) a The first photovoltaic cell assembly 31 is arranged at the top of the shell 40 and opposite to the light reflecting assembly 10; moreover, the incident light passing through the light-transmitting assembly 20 is reflected by the light-reflecting assembly 10 and then reaches the first photovoltaic cell assembly 31.

Specifically, as shown in fig. 1-3, a photovoltaic power generation unit housing 40; wherein, the light transmission component 20 is disposed on an opening of one side of the housing 40. The light reflecting component 10 is disposed at the bottom of the housing 40 and forms an included angle θ with the horizontal plane of the bottom of the housing 40₀(ii) a The first photovoltaic cell assembly 31 is disposed on the top of the casing 40 opposite to the light reflecting assembly 10, and has one end close to one end of the light transmitting assembly 20 on the casing 40. The light-transmitting member 20 is disposed on a side having incident light of the sun, so as to transmit the solar radiation irradiated thereon; the incident sunlight transmitted through the light transmitting member 20 may be reflected by the light reflecting member 10; the reflected light reflected by the light reflecting member 10 is irradiated onto the first photovoltaic cell module 31, and the first photovoltaic cell module 31 converts the reflected light energy into electric energy. In this arrangement, to reflect the incident light transmitted through the light-transmitting member 20 to the first photovoltaic cell assembly 31 by the light-reflecting member 10, the light-reflecting member 10 is disposed on a side far from the sun light irradiation position, particularly on a side close to the ground, and the first photovoltaic cell assembly 31 is disposed on a path of the reflected light after the incident light is reflected. In one embodiment, as shown in fig. 1-3, the light-transmitting member 20 is perpendicular to the horizontal plane, and the light-reflecting member 10 is inclined upward from the end connected to the light-transmitting member 20 and forms an included angle θ with the horizontal plane₀。

More specifically, the housing 40 may be metalPlastics and the like which have certain rigidity and can support the photovoltaic power generation device; the light transmission member 20 is fixedly connected with the housing 40. In order to make the light transmission component 20 sufficiently transmit light, the height of the side surface of the housing 40 should be close to the height of the light transmission component 20, i.e. the light transmission component 20 substantially constitutes one side surface of the housing 40. The light reflecting component 10 is arranged on the bottom in the shell 40, wherein one end of the light reflecting component is fixedly connected with the bottom of the shell 40 through bonding, riveting and other modes, and can also be fixedly connected with the bottom end of the light transmitting component 20; and the end of the light reflecting member 10 forms an angle theta with the horizontal plane on which the bottom is positioned₀(ii) a When theta is₀>When 0, the other end of the light reflecting component 10 is fixedly connected with the other side surface of the shell 40 opposite to the light transmitting component 20 through bonding, riveting and the like; when theta is₀When the value is 0, the bottom end of the reflector assembly 10 may also be fixedly connected to the bottom of the housing 40.

The first photovoltaic cell module 31 is disposed on the top side of the housing 40, and in order to make the device compact and make full use of the light-transmitting module 20, the first photovoltaic cell module 31 may be close to or connected to the top end of the side of the light-transmitting module 20 on the housing 40.

It should be noted that the housing 40 includes at least a side surface and a bottom surface, and may include a top surface, and the first photovoltaic cell assembly 31 is disposed in the top surface of the housing 40 or the first photovoltaic cell assembly 31 is a part of the top surface; the top surface may not be included and the first photovoltaic cell assembly 31 constitutes the top surface of the housing. The first photovoltaic cell module 31 can be attached to the corresponding surface through a special material, or fixedly mounted through a bracket, or connected with the housing through a connecting component.

And, in order to improve the utilization factor of the solar incident light. The light-transmitting component 20 should be a high light-transmitting material, such as high light-transmitting glass, high light-transmitting plastic, etc., and the light transmittance preferably reaches more than 90%; the reflective member 10 may be a glass reflector, a ceramic reflector, a metal reflector, etc., and preferably has a reflectivity of 90% or more. Theta₀The height of the sun at noon of the installation place of the photovoltaic power generation device and the position of the first photovoltaic cell module 31 relative to the light reflecting module 10 can be specifically determined, and the arrangement is such that the normal included angle between the reflected light of the light reflecting module 10 and the first photovoltaic cell module 31 is minimum.

Adopt above-mentioned scheme, the incident light that is in solar radiation gets into the device through printing opacity subassembly 20 to incidenting to reflection of light subassembly 10, the incident light shines to be located the first photovoltaic cell subassembly 31 that the setting was on the reflex reflection route after the reflection, and light is absorbed by first photovoltaic cell subassembly 31 and is converted into the electric energy, and the part takes place to reflect and shines the reflector once more, and then shines first photovoltaic cell subassembly 31 through the secondary reflection to realize the high-efficient utilization of light. In addition, the apparatus is provided with the housing 40 to form a relatively sealed space, so that the surface of the first photovoltaic cell module 31 is protected and is not easy to be stained, and maintenance is facilitated.

According to another embodiment of the present invention, the photovoltaic power generation unit further includes a second photovoltaic cell assembly 32, and the second photovoltaic cell assembly 32 is disposed in the housing 40 opposite to the light-transmitting assembly 20 to receive the light reflected by the light-reflecting assembly 10.

It should be noted that, as shown in FIG. 2, at some time, the line θ is aligned with the line₁The incident sunlight is reflected by the reflector 10 and then transmitted to the second photovoltaic cell module 32 opposite to the light-transmitting module 20, and the equivalent incident angle is (2 θ)₀+θ₁) Far greater than the initial angle of incidence theta of the sun₁Thereby significantly increasing the power generation efficiency thereof.

By adopting the technical scheme, at some time, as the solar altitude angle is reduced, the incident angle reflected to the first photovoltaic cell assembly 31 through the reflecting assembly 10 is changed, scattered light is generated, and the utilization rate of the reflected light is reduced; the second photovoltaic cell assembly 32 arranged opposite to the light transmission assembly 20 is installed, reflected light irradiates the first photovoltaic cell assembly 31 and the second photovoltaic cell assembly 32 at the same time, scattered light is further utilized, and the utilization rate of the reflected light is improved.

According to another embodiment of the present invention, a photovoltaic cell assembly is further included, which is disposed opposite to the first photovoltaic cell assembly 31. Specifically, the first photovoltaic cell assembly 31 and the photovoltaic cell assembly may be separately connected back to back, or may be both sides of a double-sided photovoltaic cell.

By adopting the scheme, the photovoltaic cell module is arranged on the back surface of the first photovoltaic cell module 31, and the photovoltaic cell module directly generates electricity facing to solar radiation, so that the utilization rate of sunlight is increased.

According to another embodiment of the present invention, the bottom of the housing 40 is at an angle θ to the horizontal₀Comprises the following steps:

wherein H₀To use the midday solar altitude of the ground.

Specifically, the installation place noon solar altitude H₀The calculation method of (1) is to assume that the solar declination of the installation place is represented by delta and observe the geographical latitude of the place

And then:

in the case of the northern hemisphere, the two hemispheres,

in the case of the southern hemisphere, the square,

H₀is calculated between 0 DEG and 90 DEG, so that theta₀The value is between 0 DEG and 45 deg.

The smaller the normal included angle between the incident light and the photovoltaic panel is, namely the larger the incident angle is, the higher the power generation efficiency is. The maximum time of solar radiation energy is at noon, and the included angle between the reflection component 10 and the horizontal plane is adjusted according to noon solar altitude, and in this embodiment, when the bottom of the photovoltaic power generation device shell 40 is arranged on the ground, the normal included angle between the refracted light at the time of the power generation peak in one day and the first photovoltaic cell component 31 can be the minimum.

By adopting the scheme, the included angle theta is set according to the solar altitude at noon of the applicable place₀And the utilization rate of solar radiation light utilized at noon is improved. The maximum altitude of the sun is H₀Incident light passing deviceThe light-transmitting component 20 on the sunny side enters the device and enters the light-reflecting component 10, light irradiates to the first photovoltaic cell component 31 on the upper side of the device after being reflected, the set angle enables most of light to be absorbed by the first photovoltaic cell, part of light is reflected and irradiates to the reflector again, and then the light irradiates to the top photovoltaic cell through secondary reflection, so that efficient utilization of light is achieved.

According to another embodiment of the present invention, as shown in FIGS. 1-4, the first photovoltaic cell assembly is at an angle β from the horizontal plane in which the top of the housing is located, and 0 ° ≦ β ≦ θ₀β is a fixed value or adjustable variation.

Specifically, as shown in fig. 4, the first photovoltaic cell assembly 31 may be parallel to the horizontal plane of the top of the housing 40 and fixedly disposed, that is, β is equal to 0 °, the first photovoltaic cell assembly 31 may be fixedly connected to the top of the housing 40, the first photovoltaic cell assembly 31 may also be disposed at an inclined included angle with the horizontal plane of the top of the housing 40, as shown in fig. 1-2, the inclined included angle β is formed between the first photovoltaic cell assembly 31 and the horizontal plane of the top of the housing 40, and the inclined included angle β satisfies 0 °<β≤θ₀β can be fixed, and the arrangement should at least minimize the normal angle between the light reflecting component 10 and the photovoltaic cell component 31 for reflecting midday sunlight, so as to achieve the purpose of improving the utilization rate of light.

The included angle β can also be set to satisfy the condition that the theta is more than or equal to 0 degree and less than or equal to β degree₀The included angle β is adjustable, specifically, the first photovoltaic cell module 31 and the top of the housing 40 may be rotatably connected through coupling, riveting, or the like, so that the included angle β is adjustable, and a fixing member is further required to be provided to allow the first photovoltaic cell module 31 to be relatively fixed at a certain angle, or one end of the top of the housing 40 may be rotatably connected to a side surface, and the other end may be opened to the other side surface, the first photovoltaic cell module 31 is fixedly connected to the top of the housing 40, and the included angle β between the horizontal planes where the first photovoltaic cell module 31 and the top of the housing 40 are located is adjustable by opening the top at a certain angle.

Calculating to obtain the optimal theta according to the solar altitude at noon of the using place₀On the basis of the sun, the altitude of the sun is reduced at other times except at noon,the incident angle reflected to the first photovoltaic cell assembly 31 will vary, the included angle β is adjustable, the incident angle can be adjusted by adjusting the included angle β, and the utilization rate of the reflected light is improved₀The maximum utilization of the solar radiation light all day as far as possible can be realized.

By adopting the above scheme, the first photovoltaic cell module 31 sets the horizontal plane relation between the first photovoltaic cell module 31 and the top of the shell 40 according to the light reflected by the light reflecting component 10, and the first photovoltaic cell module 31 and the horizontal plane relation between the top of the shell 40 are adjusted in parallel or in a set manner to form an inclined included angle, so that the utilization rate of the reflected light is improved. Moreover, when the solar altitude angle is reduced at some time, the incident angle reflected to the first photovoltaic cell module 31 is changed, and the incident angle is adjusted by adjusting the included angle between the first photovoltaic cell module 31 and the horizontal plane on which the top of the housing 40 is located, so that the utilization rate of reflected light is improved.

According to another embodiment of the present invention, as shown in fig. 4, the housing 40 has a rectangular or square structure; the reflecting component 10 is arranged on the bottom in the shell 40, and one end of the reflecting component is fixedly connected with the bottom of one side of the shell 40, and the other end of the reflecting component is fixedly connected with the other side of the shell 40 opposite to the light-transmitting component 20; the first photovoltaic cell assembly 31 is fixedly attached in-plane.

Specifically, the light-transmitting component 20 is perpendicular to the horizontal plane of the bottom in the housing 40, and an included angle θ is formed between the end of the light-reflecting component 10 connected to the light-transmitting component 20 and the bottom₀The first photovoltaic cell assembly 31 is parallel to the light reflecting assembly 10, an included angle β formed by the light transmitting assembly 20 and the first photovoltaic cell assembly 31 can be fixed to be 0 degree or can be arranged in an adjustable mode, and a second photovoltaic cell assembly 32 can be arranged on one side, opposite to the light transmitting assembly 20, in the shell 40.

By adopting the technical scheme, the device has stable integral structure and regular shape. A single photovoltaic power generation unit can be used as one module; or a plurality of photovoltaic power generation units can be combined into a multi-module device, so that the application of the multi-module device is facilitated.

According to another embodiment of the present invention, the height H of the housing 40 is:

H＝L(tgθ₀+tgH₀)

wherein L is the width between the side of the housing 40 where the light-transmitting component 20 is located and the opposite side, and H₀At noon solar altitude, theta, for using the ground₀Is the angle that the light reflecting member 10 makes with the horizontal plane in which the bottom of the housing 40 is located.

Specifically, the optimal theta is calculated according to the solar altitude at noon of the using place₀On the basis that the casing 40 is of a cuboid or cube structure, the embodiment integrates the solar altitude at noon H of the use place according to the width L of the bottom of the casing 40₀The angle theta formed by the light reflecting component 10 and the horizontal plane on which the bottom of the shell 40 is positioned₀By adopting the above formula, the height of the housing 40 is calculated and set so that the first photovoltaic cell module 31 receives the least shadow covering of the reflected light throughout the day, and the maximum total solar radiation energy throughout the day is obtained.

It should be noted that the width of the housing 40 can be designed according to specific needs.

By adopting the scheme, the solar altitude H at noon of the use place is comprehensively determined according to the width L of the bottom of the shell 40₀And theta₀The height H of the housing 40 is set to maximize the total solar radiation energy of the first photovoltaic cell module 31 throughout the day, thereby improving the solar radiation light energy utilization rate.

According to another embodiment of the present invention, as shown in fig. 3, the solar module further includes a third photovoltaic module 33, the third photovoltaic module 33 is disposed on a side surface of the housing 40 adjacent to the light-transmitting module 20; the light reflecting component 10 is divided into a main body section 11 and an adjusting section 12 along the horizontal extending direction of the light transmitting component 20, and the adjusting section 12 is arranged on one side of the shell 40 far away from the third photovoltaic component 33; the adjusting section 12 and the horizontal plane where the main body section 11 is located form an included angle phi; the third photovoltaic module 33 receives light reflected by the adjustment segment 12 of the reflective module 10.

Specifically, the third photovoltaic module 33 is disposed on one or two adjacent sides of the light-transmitting component 20, and the third photovoltaic module 33 is perpendicular to the horizontal plane where the bottom of the housing 40 is located. The light reflecting component 10 is provided with an adjusting section 12 at one or two ends along the horizontal extending direction of the light transmitting component 20, and a main body section 11 at other parts. The adjusting section 12 corresponding to each third photovoltaic module 33 is disposed on the opposite side of the third photovoltaic module 33, and an included angle Φ is formed between the adjusting section 12 and the horizontal plane of the main body section 11, so that solar radiation light enters through the light-transmitting assembly 20, and reflected light reflected by the adjusting section 12 illuminates the third photovoltaic module 33. It should be noted that the included angle Φ may be fixed or adjustable.

With the above scheme, when the deviation between the incident light and the normal direction of the light-transmitting component 20 is large, the incident light may fall on the side of the device after being reflected by the light-reflecting component 10, and therefore the photovoltaic component 33 is also installed on the side of the device. In addition, the end part of the reflecting component is provided with an extending end which forms an included angle with the horizontal plane, so that the angle of the reflected light incident on the third photovoltaic component 33 can be adjusted, and the utilization rate of the reflected light is improved.

Further, the included angle Φ is adjustable, and is:

Φ＝90-15×(ST-12)

wherein ST is the intensity of solar radiation of the using ground reaching 50W/m²True solar time.

Specifically, the main body segment 11 and the adjusting segment 12 of the light reflecting assembly 10 are rotatably connected by means of shaft connection, riveting, etc., so that the included angle Φ is adjustable. ST is measured at 24 hours. True time is equal to flat time plus time difference; the average solar time refers to the time reporting time of the country region which is referenced at ordinary times, such as Beijing time, and the time intervals are equal every day; time difference is (local longitude-120)/15.

By adopting the scheme, the included angle phi is adjusted according to time, the sunlight at the time period with the lower solar altitude angle can be reflected to the third photovoltaic cell assemblies 33 arranged at one side or two sides adjacent to the light-transmitting assembly 20, and then the incident angle is improved, so that the utilization rate of the reflected light is improved.

According to another embodiment of the present invention, the length W of the adjustment segment 12 along the direction in which the light transmission member 20 extends horizontally₀Comprises the following steps:

W₀＝1/5×W

where W is the length of the light reflecting member 10 along the direction in which the light transmitting member 20 horizontally extends.

Specifically, 1/5 of the length W of the reflector assembly 10 of the segment 12 is adjusted when the third photovoltaic cell assembly 33 is disposed on one side; thus, the main body segment 11 occupies 4/5 of the length W of the light reflecting assembly 10 for reflecting light to the first photovoltaic assembly 31; when the third photovoltaic module 33 is disposed on the bright side, the adjusting section 12 has two sections, and the main section 11 occupies 3/5 of the length W of the light reflecting module 10 for reflecting light to the first photovoltaic module 31.

When W is relatively large or small, W is₀And may be increased or decreased as the case may be. And, the length W of the adjusting section 12 along the direction in which the light transmission member 20 horizontally extends₀It is also possible to calculate from other parameters, for example from the solar altitude at which the place of use is the earliest day to produce useful solar radiation, as long as the solar utilisation is improved for periods of low solar altitude.

By adopting the scheme, the light reflecting component 20 is mainly used for reflecting light to the first photovoltaic component 31, and part of the light reflecting component is used for reflecting the light to the third photovoltaic component 33, so that the distribution is reasonable, and the utilization rate of the reflected light is improved.

According to another embodiment of the present invention, as shown in fig. 4, a photovoltaic power generation apparatus includes at least two photovoltaic power generation units; each photovoltaic power generation unit is arranged adjacently; and, the bottom of the case 40 of one of the photovoltaic power generation units and the top of the case 40 of the other photovoltaic power generation unit are connected.

Specifically, the plurality of shells 40 are connected with each other by the bottom and the top to form a multi-module device, and the whole structure is neat; more specifically, the connection can be non-detachable and fixed by means of bonding, welding and the like, and can also be detachable and fixed by means of screwing, pin joint and the like. The traditional flat-plate solar photovoltaic power generation device needs to keep an inclination angle, and the structure occupies a space position, so that the large-scale popularization cannot be realized in the aspect of green buildings; the photovoltaic power generation device disclosed by the embodiment can be applied to a building curtain wall.

By adopting the scheme, the photovoltaic power generation units are connected with each other by the bottoms and the tops to form the multi-module device, and the whole structure is neat. The photovoltaic power generation device disclosed by the embodiment can be applied to a building curtain wall and is installed on a building sunny side.

In the photovoltaic power generation device disclosed by the embodiment of the invention, the light-transmitting component 20 is high-light-transmitting glass.

By adopting the technical scheme, the light transmittance of the high-light-transmittance glass can reach more than 91.5%, and the utilization rate of solar radiation light can be improved.

According to another embodiment of the present invention, the photovoltaic power generation apparatus disclosed in the embodiment of the present invention, the reflective member 10 is a glass reflective lens.

By adopting the technical scheme, the reflectivity of the glass reflecting lens can reach 100 percent, and the utilization rate of reflected light can be improved.

While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that the foregoing is a more detailed description of the invention, taken in conjunction with the specific embodiments thereof, and that no limitation of the invention is intended thereby. Various changes in form and detail, including simple deductions or substitutions, may be made by those skilled in the art without departing from the spirit and scope of the invention.