Solar Energy Utilization Device

Abstract

The liquid light collector 100 has a light receiving surface larger than the width of the first light energy utilization unit 210 and / or the second light energy utilization unit 220 so that the liquid light collector can receive more sunlight. The liquid light collector is filled with a transparent liquid 130, so that the sunlight can reach the transparent liquid from the light-transmitting cavity wall of the liquid light collector and cause a total reflection phenomenon. By being reflected by the reflecting groove 300, the sunlight from the liquid light collector 100 can return to the liquid light collector 100 or irradiate the light energy utilization device 200. The total reflection phenomenon and the reflecting groove work together to collect more sunlight on the light energy utilization device 200, improving the light collection efficiency. In addition, the liquid light collector has an axisymmetric structure or a rotational structure. This structure can accommodate a larger angle change of the sunlight or expand the area of ​​the light receiving surface, so that it can increase the light collection rate or accommodate the change of the sunlight in the east-west direction.

Description

[Technical field]

[0001] The present invention relates to light energy conversion and utilization devices. [Background technology]

[0002] As the cost of solar panels falls and their efficiency increases, solar energy systems are becoming more common. However, current low-magnification concentrator photovoltaic systems are not typically liquid-cooled and operate at high temperatures that reduce their efficiency. Other systems do employ liquid cooling, but do not take advantage of the optical capabilities of the liquid. Summary of the Invention [Problem to be solved by the invention]

[0003] The present disclosure mainly provides a new type of solar energy utilization device to present a new solar energy utilization structure. [Means for solving the problem]

[0004] Based on the above object, as one embodiment, the present invention provides a solar energy utilization apparatus including a light energy utilization unit, a liquid light-condensing unit, and a reflection groove. The light energy utilization apparatus has a first light energy utilization section and a second light energy utilization section that can receive, convert, and utilize sunlight. The first light energy utilization section and the second light energy utilization section are arranged back to back.

[0005] The liquid light collecting device has an axisymmetric structure or a rotational structure. The liquid light collecting device has a storage cavity filled with a transparent liquid, at least a part of the cavity wall being a light-transmitting cavity wall. The light-transmitting cavity wall is for receiving sunlight incident from the outside, and is a light-receiving surface whose width is larger than that of the first light energy utilization unit and / or the second light energy utilization unit. The light energy utilization device may be disposed inside or outside the storage cavity, and may form a cavity wall of the storage cavity.

[0006] A reflecting surface is provided on the inner wall of the reflecting groove. The liquid light collecting device is disposed in the reflecting groove, and the second light energy utilization part is disposed facing the reflecting surface. A part of the sunlight reaches the reflecting surface from the liquid light collecting device, and is reflected by the reflecting surface, so that the part of the sunlight can return into the liquid light collecting device or can irradiate the light energy utilization device. A part of the sunlight is totally reflected from the transparent liquid in the accommodating cavity to the light-transmitting cavity wall, so that the sunlight is collected on the light energy utilization device.

[0007] In one embodiment, the light energy utilization device is disposed in the accommodation cavity, and gaps are provided between the first light energy utilization unit and the cavity wall, and between the second light energy utilization unit and the cavity wall, for accommodating the transparent liquid that guides sunlight to the first light energy utilization unit and the second light energy utilization unit.

[0008] In one embodiment, the translucent cavity wall includes a translucent top wall and a translucent bottom wall. The light energy utilization device is disposed in the accommodation cavity. The first light energy utilization unit is disposed inside the translucent top wall to receive the sunlight incident from the translucent top wall, and the transparent liquid is disposed between the second light energy utilization unit and the translucent bottom wall to guide the sunlight to the second light energy utilization unit.

[0009] In one embodiment, the translucent cavity wall includes a translucent top wall and a translucent bottom wall. The first light energy utilization unit is disposed outside the translucent bottom wall. The transparent liquid guides sunlight to the first light energy utilization unit, and at least a portion of the sunlight is irradiated onto the second light energy utilization unit by reflection from the reflective surface.

[0010] In one embodiment, the transparent top wall or the transparent bottom wall is a flat surface, a curved surface, a folded surface, or a Fresnel lens tooth surface.

[0011] In one embodiment, the light-transmitting bottom wall has a V-shaped structure or an inverted V-shaped structure.

[0012] In one embodiment, the reflecting surface and the light-transmitting bottom wall are spaced apart from each other.

[0013] In one embodiment, a portion of the light-transmitting bottom wall and a portion of the reflective surface overlap.

[0014] In one embodiment, the transparent bottom wall has a V-shaped structure or an inverted V-shaped structure, and the bottom of the reflective groove and the V-shaped structure or the inverted V-shaped structure overlap each other.

[0015] In one embodiment, at least a portion of the reflective surface is a reflective Fresnel lens.

[0016] In one embodiment, the bottom of the reflecting groove has a reflecting structure provided so as to be convex toward the liquid light collecting device.

[0017] In one embodiment, the device further includes a sealed container in which the light energy utilization device and the liquid light collecting device are disposed. The sealed container has a light-transmitting surface, which allows sunlight to enter the liquid light collecting device from the light-transmitting surface. A working medium is provided in the sealed container and is in contact with the light energy utilization device. In order to utilize the working medium, the sealed container has a first external connection port through which the working medium enters and leaves the sealed container.

[0018] In one embodiment, the solar energy utilization device further includes an attachment member connected to the liquid concentrating device and / or the reflective groove for connecting the solar energy utilization device to another adjacent solar energy utilization device. Effect of the Invention

[0019] The solar energy utilization device according to the above embodiment includes a light energy utilization device, a liquid light collecting device, and a reflecting groove. The light receiving surface of the liquid light collecting device is larger than the width of the first light energy utilization unit and / or the second light energy utilization unit so that more sunlight can be received. The liquid light collecting device is filled with a transparent liquid, so that sunlight can reach the transparent liquid from the light-transmitting cavity wall of the liquid light collecting device, causing a total reflection phenomenon. The sunlight that passes through the liquid light collecting device can be reflected by the reflecting groove to return into the liquid light collecting device, or can be reflected to irradiate the light energy utilization device.

[0020] The total reflection phenomenon and the reflection grooves work together to concentrate more sunlight on the light energy utilization device, improving the light concentration efficiency. The liquid light collector has an axisymmetric structure or a rotational structure. This structure can accommodate larger angle deflection of sunlight or enlarge the area of ​​the light receiving surface, thereby increasing the focusing ratio and adapting to the change in the east-west direction of sunlight. [Brief description of the drawings]

[0021] [Figure 1] FIG. 1 is a schematic cross-sectional view of a solar energy utilization device according to a first embodiment of the present invention. [Diagram 2] FIG. 5 is a schematic cross-sectional view of a solar energy utilization device according to a second embodiment of the present invention. [Diagram 3] FIG. 11 is a schematic exploded view of a solar energy utilization device according to a third embodiment of the present invention. [Figure 4] FIG. 11 is a schematic cross-sectional view of a solar energy utilization device according to a fourth embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0022] The present invention will be described in detail below in conjunction with the drawings through specific embodiments. For similar parts in different embodiments, the relevant similar part numbers are adopted. Many detailed descriptions in the following embodiments are provided to allow a better understanding of the present invention. However, those skilled in the art can easily recognize that some of the features can be omitted in different situations or can be replaced by other parts, materials and methods. In order to avoid the core part of the present invention being buried by excessive description, some operations according to the present invention may not be shown or described in the specification. For those skilled in the art, it is not necessary to describe these related operations in detail, and those skilled in the art can fully understand the related operations according to the description in this specification and the general technical knowledge in the field.

[0023] It should be noted that the features, operations, or characteristics described herein may be combined in any suitable manner to form various embodiments. Also, the steps or actions in the method descriptions may be reordered or adjusted in a manner that is apparent to one of ordinary skill in the art. Thus, any order in the specification and drawings is merely for the purpose of clarifying one embodiment, and does not imply a required order unless specifically stated that a particular order must be followed.

[0024] The part numbers in this specification, such as "first", "second", etc., are used only to distinguish the objects described and do not have any order or technical meaning. In addition, "connection" described in the present invention includes direct and indirect connection unless otherwise specified.

[0025] The present embodiment provides a solar energy utilization device that is used to receive and utilize sunlight to perform energy conversion, and convert the sunlight into electrical energy, thermal energy and other forms of energy for people to use.

[0026] The solar energy utilization device includes at least one light energy utilization device, at least one liquid light collecting device, and a reflection groove. The light energy utilization device has a first light energy utilization unit and a second light energy utilization unit that can receive, convert, and utilize sunlight. The first light energy utilization unit and the second light energy utilization unit are arranged back to back. In one embodiment, the first light energy utilization unit and the second light energy utilization unit may be one or more of a solar cell panel, a light heat utilization device, a photoelectric and thermal energy integrated utilization device, and a light-concentrating type light energy utilization device. The solar cell panel generally refers to a device that directly converts light energy into electrical energy, and includes various semiconductor solar cell panels, film-type solar cells, quantum dot photoelectric conversion elements, etc. In other embodiments, the first light energy utilization unit and the second light energy utilization unit may be other types of solar energy utilization conversion structures.

[0027] The liquid light collecting device has a plurality of cavity walls. The cavity walls form a receiving cavity filled with a transparent liquid. The light energy utilization device may be disposed in or outside the receiving cavity, and may form the cavity wall of the receiving cavity. At least a part of the cavity walls is a light-transmitting cavity wall, for example, all of the cavity walls may be light-transmitting cavity walls. The light-transmitting cavity wall may be designed as a bottom wall, a side wall, or a top wall of the receiving cavity according to actual needs. All of the light-transmitting cavity walls are made of a light-transmitting material, so that the sunlight can pass through the light-transmitting cavity walls and reach the transparent liquid. At least one of the light-transmitting cavity walls is a light-receiving surface for receiving the sunlight incident from the outside. Although the top wall is usually used as the light-receiving surface, the light-receiving surface is not limited to the top wall.

[0028] The structure of the liquid light collecting device is set as follows. A part of the sunlight that travels from the transparent liquid to the translucent cavity wall undergoes the phenomenon of total reflection (or total internal reflection). That is, the sunlight that reaches the transparent liquid continues to propagate within the liquid light collecting device by the action of total reflection, and is finally collected on the first light energy utilization unit and / or the second light energy utilization unit. The translucent cavity wall that can cause the phenomenon of total reflection differs depending on the arrangement position of the first light energy utilization unit and / or the second light energy utilization unit.

[0029] The inner wall of the reflecting groove has a reflecting surface for reflecting the sunlight toward the first light energy utilization unit and / or the second light energy utilization unit. The liquid light collecting device is disposed in the reflecting groove. In one embodiment, the second light energy utilization unit is disposed facing the reflecting surface. A portion of the sunlight passes through the liquid light collecting device and reaches the reflecting surface, and is reflected by the reflecting surface, so that it can return into the liquid light collecting device or irradiate the second light energy utilization unit. At least a portion of the sunlight that has returned to the liquid light collecting device continues to be collected by the total reflection phenomenon on the first light energy utilization unit and / or the second light energy utilization unit.

[0030] In this embodiment, the light receiving surface of the liquid light collecting device is larger than the width of the first light energy utilization unit and / or the second light energy utilization unit so that more sunlight can be received. The sunlight can pass through the light-transmitting cavity wall of the liquid light collecting device and reach the transparent liquid, causing a total reflection phenomenon. By being reflected by the reflection groove, the sunlight that has passed through the liquid light collecting device can return into the liquid light collecting device or irradiate the light energy utilization device. By the cooperation of the total reflection phenomenon and the reflection groove, more sunlight can be collected on the light energy utilization device. In order to make better use of the sunlight, this embodiment employs a double-sided light receiving structure (the first light energy utilization unit and / or the second light energy utilization unit) that are arranged to face each other. This improves the light collection efficiency by absorbing the sunlight from two back-to-back directions (for example, two opposing directions toward the sun and away from the sun).

[0031] The liquid light collecting device has an axisymmetric structure (including one or two symmetry axes) or a rotational structure. Axisymmetric means that the shapes of the cross sections cut along an unspecified plane perpendicular to the axis are almost the same, and the sizes may be the same or different. In one embodiment, the axisymmetric structure may be a uniaxially symmetric structure having one symmetry axis. Or, it may be a biaxially symmetric structure having two or more symmetry axes. That is, in the liquid light collecting device, the cross sections obtained by cutting along two or more planes that are different in direction and not parallel to each other may form an axisymmetric structure in different directions. For example, a square structure can be cut from a plurality of different directions to obtain different cross sections, and these cross sections themselves have an axisymmetric structure. The rotational structure refers to a structure provided to incorporate one center line by an arc-shaped surface, a folded surface, or a combination of an arc-shaped surface and a folded surface, and includes not only a three-dimensional rotational structure formed by rotating around one rotational center line, but also a similar structure formed by replacing the arc-shaped surface of a three-dimensional rotational structure with a folded surface or a combination of a folded surface and an arc-shaped surface. In a rotating structure, the outer walls are arranged to surround the center. Specifically, in a three-dimensional rotating structure, when cut in any plane passing through the center line of rotation, the same cross section is obtained with the center line as the axis of symmetry. In other structures similar to the three-dimensional rotating structure, the use of folded surfaces instead of arcuate surfaces of the rotor may not ensure that the same and symmetric cross sections are obtained when cut in all planes passing through the center line, but the cross sections obtained by cutting in some planes passing through the center line at a certain angle may also be the same and symmetric shape. Such axisymmetric or rotating structures can accommodate larger angular changes in sunlight or enlarge the area of ​​the light receiving surface, and can be used to increase the light collection rate or accommodate changes in the east-west direction of sunlight.

[0032] In one embodiment, the transparent liquid may be pure water, antifreeze (a mixture of water and ethylene glycol), or other environmentally friendly transparent liquid (e.g., a mixture of water and glycerin). The transparent liquid may directly or indirectly form a heat transfer structure with the first light energy utilization unit and / or the second light energy utilization unit. This provides a cooling effect or heat absorption effect on the first light energy utilization unit, improving the light energy utilization rate.

[0033] Furthermore, the light energy utilization device may be disposed inside or outside the receiving cavity, or may form a cavity wall of the receiving cavity. In one embodiment, the light energy utilization device is disposed in the receiving cavity, and gaps are provided between the first light energy utilization unit and the receiving cavity, and between the second light energy utilization unit and the receiving cavity, for accommodating a transparent liquid that guides sunlight to the first light energy utilization unit and the second light energy utilization unit.

[0034] In one embodiment, the light-transmitting cavity wall includes a light-transmitting top wall and a light-transmitting bottom wall. The light energy utilization device is disposed in the receiving cavity. The first light energy utilization unit is attached to the inside or outside of the light-transmitting top wall to receive the sunlight incident from the light-transmitting top wall. Between the second light energy utilization unit and the light-transmitting bottom wall, there is a transparent liquid for guiding the sunlight to the second light energy utilization unit.

[0035] In one embodiment, the translucent cavity wall includes a translucent top wall and a translucent bottom wall. The first light energy utilization unit is disposed on the outside or inside of the translucent bottom wall, and the transparent liquid guides the sunlight to the first light energy utilization unit, and the reflective surface reflects a portion of the sunlight to the second light energy utilization unit.

[0036] Based on the above inventive concept, the present invention is further described below through several different embodiments to better illustrate the present invention.

[0037] <Embodiment 1> Please refer to FIG. 1. The solar energy utilization device in the first embodiment includes a liquid light collecting device 100, a light energy utilization device 200, and a reflection groove 300. The liquid light collecting device 100 is filled with a transparent liquid 130 and has a sealed structure formed as a sealed storage cavity. The storage cavity has a light-transmitting top wall 110 and a light-transmitting bottom wall 120. The light energy utilization device 200 is immersed in the transparent liquid 130 and has a first light energy utilization part 210 facing upward and a second light energy utilization part 220 facing downward, which can receive, convert, and utilize sunlight. Between the first light energy utilization part 210 and the cavity wall of the storage cavity, and between the second light energy utilization part 220 and the cavity wall, there are provided gaps for accommodating the transparent liquid 130 that guides sunlight to the first light energy utilization part 210 and the second light energy utilization part 220. The liquid light collecting device 100 and the light energy utilization device 200 are disposed within a groove of a reflecting groove 300 having a reflecting surface.

[0038] Of course, in other embodiments, the light energy utilization device 200 may be disposed on the inner or outer surface of the light-transmitting top wall 110 or the light-transmitting bottom wall 120 of the liquid light concentrating device 100 .

[0039] 1 shows a process in which a part of the incident light L is refracted by the liquid light collecting device 100, reflected by the reflecting groove 300, refracted again by the liquid light collecting device 100, and totally reflected until it reaches the light energy utilization device 200. On the other hand, sunlight not shown may be directly irradiated and / or totally reflected from the liquid light collecting device 100 to the first light energy utilization unit 210 without being reflected by the reflecting groove 300. That is, by fully utilizing the total reflection phenomenon of the transparent liquid 130 in the liquid light collecting device 100 and the reflecting action of the reflecting groove 300, the function of converging and collecting sunlight at a larger angle is realized.

[0040] In one embodiment, at least a portion of the reflective surface of the reflective groove 300 is a reflective Fresnel lens or other type of reflective structure.

[0041] In one embodiment, the transparent liquid 130 is used to cool or absorb heat from the light energy utilization device 200, and to improve the light energy utilization rate of the light energy utilization device 200. That is, a part of the light-transmitting side wall (e.g., the light-transmitting top wall 110) has the following two functions. First, it transmits incident light from the outside through one surface, and then it totally reflects the light from the transparent liquid 130 at the one surface. In another embodiment, the light-transmitting bottom wall 120 (at least a part) also has both functions of transmission and total reflection.

[0042] Please refer to FIG. 1. In embodiment 1, the liquid light collector 100 is a rotating structure, specifically a three-dimensional rotating structure, and C is its rotation center line. Shown in FIG. 1 is a cross section of the liquid light collector 100 after cutting along a vertical plane including the rotation center line C. The shape of the liquid light collector 100 in three-dimensional space should be formed by rotating the cross section around the rotation center line C along the direction shown by the dashed line A in FIG. 1. In FIG. 1, the dashed line A is shown as an ellipse for perspective consideration, but in reality, the orbit of the cross section rotating around the rotation center line C is a circle. The cross section shown in FIG. 1 is a pentagonal folding surface, and the transparent bottom wall 120 is formed by combining four folding surfaces. In other embodiments, the cavity wall of the liquid light collector 100 may be a curved surface or a tooth surface of a Fresnel lens. For example, the optically transmissive top wall 110 or the optically transmissive bottom wall 120 may be flat, curved, folded, or Fresnel lens toothed. The cross section of the liquid light collector 100 may be other shapes, such as a tetrahedron, a heptahedron, or the like.

[0043] Please continue to refer to FIG. 1. In the first embodiment, the transparent bottom wall 120 has a V-shaped structure 121 (or an inverted V-shaped structure) to expand the vertical depth of the transparent bottom wall 120. The bottom of the reflecting groove 300 may have a reflecting structure 310 that is provided to be convex toward the liquid light collecting device 100. The V-shaped protruding reflecting structure 310 shown in FIG. 1 faces the V-shaped structure 121 of the transparent bottom wall 120, so that more sunlight is irradiated onto the second light energy utilization unit 220, the utilization rate of sunlight by the second light energy utilization unit 220 is increased, and the overall efficiency of the light energy utilization device is improved.

[0044] In one embodiment, the reflective surface and the light-transmitting bottom wall 120 are spaced apart and do not contact each other. Alternatively, in order to improve heat dissipation, a part of the light-transmitting bottom wall 120 may be in contact with or overlap with the reflective surface. The contact may be a point contact, a line contact, or a surface contact. The overlap between the light-transmitting bottom wall 120 and the reflective surface may be an integrated structure. For example, the bottom of the reflecting groove 300 and the V-shaped structure 121 or the inverted V-shaped structure may be in contact with or overlap with each other.

[0045] <Embodiment 2> Please refer to Fig. 2. The solar energy utilization device according to the second embodiment includes a liquid collector 100, a light energy utilization device 200, and a reflecting groove 300. Fig. 2 shows a cross section of the solar energy utilization device in the second embodiment. The liquid collector 100 and the reflecting groove 300 each have an elongated shape that is symmetrical about a single axis, and the cross section has an axially symmetrical structure.

[0046] The difference between the solar energy utilization device in the second embodiment and the first embodiment is that the translucent bottom wall 120 in the second embodiment is composed of six planes. The translucent bottom wall 120 also has a V-shaped structure 121 (or an inverted V-shaped structure) to expand the vertical depth of the translucent bottom wall 120. However, the difference is that the central part of the reflecting groove 300 in the second embodiment is a linear reflective Fresnel lens. In order to increase the reflected path of the sunlight, the reflecting surface of the reflecting groove 300 (for example, the linear reflective Fresnel lens 320 at the bottom) and the translucent bottom wall 120 are provided at a distance from each other.

[0047] <Embodiment 3> Please refer to Fig. 3. The solar energy utilization device according to the third embodiment includes a liquid light collecting device 100, a light energy utilization device 200, and a reflecting groove 300. The liquid light collecting device 100 and the reflecting groove 300 in the third embodiment are both biaxially symmetrical structures having two symmetrical axes, and the biaxially symmetrical structures are cut from two different directions to obtain cross sections that are axially symmetrical. Fig. 3 is an exploded three-dimensional structural view of the solar energy utilization device, and the liquid light collecting device 100 may specifically be in the shape of an inverted square pyramid. The third embodiment is suitable for use with a solar tracking system.

[0048] The main difference between the third embodiment and the first embodiment is that the translucent cavity wall includes a translucent top wall 110 and a translucent bottom wall 120, and the first light energy utilization unit 210 is disposed outside the translucent bottom wall 120. For example, the central portion of the bottom surface of the liquid light collecting device 100 is flat, and the light energy utilization device 200 is disposed below this flat portion. The sunlight is guided to the first light energy utilization unit 210 by the transparent liquid 130, and at least a portion of the sunlight can be irradiated to the second light energy utilization unit 220 by reflection on the reflective surface.

[0049] In one embodiment, the protruding reflective structures 310 in the reflective groove 300 may have point, line or area contact with the light-transmitting bottom wall 120 for better heat dissipation.

[0050] Furthermore, in the third embodiment, a mounting member is further provided, which is connected to the liquid light collecting device 100 and / or the reflective groove 300. The mounting member is used to connect the solar energy utilization device to another device. See FIG. 3. In a more specific embodiment, the mounting member is a transparent hanger 111 for mounting the solar energy utilization device. For example, the mounting member is used to hang the entire solar energy utilization device on another object or another solar energy utilization device via the hanger 111.

[0051] <Embodiment 4> Please refer to Fig. 4. The solar energy utilization device according to the fourth embodiment includes a liquid light collecting device 100, a light energy utilization device 200, and a reflecting groove 300. The liquid light collecting device 100 and the reflecting groove 300 in the fourth embodiment each have an elongated shape symmetrical about a single axis, and the cross section with respect to the axis of symmetry has an axially symmetric structure.

[0052] The light-transmitting cavity wall includes a light-transmitting top wall 110 and a light-transmitting bottom wall 120. The light energy utilization device is disposed in the accommodation cavity, and the first light energy utilization unit 210 is attached to the inside of the light-transmitting top wall 110 to receive the sunlight incident from the light-transmitting top wall 110. Between the second light energy utilization unit 220 and the light-transmitting bottom wall 120, there is a transparent liquid 130 for guiding the sunlight to the second light energy utilization unit 220. For example, the transparent liquid 130 is used to guide as much sunlight as possible to the second light energy utilization unit 220 by the total reflection phenomenon.

[0053] The solar energy utilization device further includes a sealed container 400 in which the light energy utilization device 200 and the liquid collector 100 are disposed. The sealed container 400 has a light-transmitting surface so that sunlight can enter the liquid collector 100 from the light-transmitting surface. The light-transmitting surface may be the top surface or another surface of the sealed container 400. A working medium 420 is provided in the sealed container 400 and is in contact with the light energy utilization device 200 and / or the reflecting groove 300. To utilize the working medium 420, the sealed container 400 has a first external connection port 410 through which the working medium 420 enters and leaves the sealed container 400.

[0054] Specifically, please refer to Fig. 4. In a more specific embodiment, the sealed container 400 is disposed under the reflecting groove 300 and is in thermal contact with the liquid collector 100 and / or the reflecting groove 300. In order to be used for the incidence of sunlight, a part of the surface of the sealed container 400 (e.g., the upper surface) may overlap with or be shared with a part of the surface of the liquid collector 100 or the reflecting groove 300. In the sealed container 400, a working medium 420 and a first external connection port 410 for exchanging heat with an external heat utilization device are provided.

[0055] In embodiment 4, in order to promote heat exchange between the transparent liquid 130 of the liquid-transparent lens and the working medium 420 in the sealed container 400, the central portion of the light-transmitting bottom wall 120 is inverted V-shaped and overlaps with the convex reflective structure 310 in the reflective groove 300, and this portion is immersed in the working medium 420 in the sealed container 400.

[0056] Although the present invention has been described in detail above using specific examples, the above embodiments are merely for the purpose of deepening understanding of the present invention and are not intended to limit the present invention. Those skilled in the art can modify the above specific embodiments based on the concept of the present invention.

Claims

1. A solar energy utilization device including a light energy utilization device, a liquid concentrating device, and a reflecting groove, The light energy utilization device has a first light energy utilization unit and a second light energy utilization unit that can receive, convert, and utilize sunlight, and the first light energy utilization unit and the second light energy utilization unit are arranged back to back, the liquid light collecting device has an axially symmetric structure or a rotational structure, the liquid light collecting device has a storage cavity filled with a transparent liquid, at least a part of the cavity wall being a light-transmitting cavity wall, the light-transmitting cavity wall is a light-receiving surface for receiving sunlight incident from the outside, the light energy utilization device is disposed inside or outside the storage cavity, or forms a cavity wall of the storage cavity, and the width of the light-receiving surface is larger than the width of the first light energy utilization part and / or the second light energy utilization part, a reflecting surface is provided on an inner wall of the reflecting groove, the liquid light collecting device is disposed in the reflecting groove, and the second light energy utilization unit is disposed facing the reflecting surface; A portion of the sunlight reaches the reflective surface from the liquid light collecting device, and is then reflected by the reflective surface, so that the portion of the sunlight can either (a) return into the liquid light collecting device, or (b) irradiate the light energy utilization device, A part of the sunlight is totally reflected from the transparent liquid in the containing cavity to the light-transmitting cavity wall, thereby concentrating the sunlight on the light energy utilization device; The solar energy utilization device is characterized in that the translucent cavity wall includes a translucent top wall and a translucent bottom wall, the light energy utilization device is arranged within the storage cavity, the first light energy utilization unit is attached to the inside of the translucent top wall to receive sunlight incident from the translucent top wall, and the transparent liquid is provided between the second light energy utilization unit and the translucent bottom wall to guide sunlight to the second light energy utilization unit.

2. A solar energy utilization device comprising a light energy utilization device, a liquid concentrating device, and a reflecting groove, The light energy utilization device has a first light energy utilization unit and a second light energy utilization unit that can receive, convert, and utilize sunlight, and the first light energy utilization unit and the second light energy utilization unit are arranged back to back, the liquid light collecting device has an axially symmetric structure or a rotational structure, the liquid light collecting device has a storage cavity filled with a transparent liquid, at least a part of the cavity wall being a light-transmitting cavity wall, the light-transmitting cavity wall is a light-receiving surface for receiving sunlight incident from the outside, the light energy utilization device is disposed inside or outside the storage cavity, or forms a cavity wall of the storage cavity, and the width of the light-receiving surface is larger than the width of the first light energy utilization part and / or the second light energy utilization part, a reflecting surface is provided on an inner wall of the reflecting groove, the liquid light collecting device is disposed in the reflecting groove, and the second light energy utilization unit is disposed facing the reflecting surface; A portion of the sunlight reaches the reflective surface from the liquid light collecting device, and is then reflected by the reflective surface, so that the portion of the sunlight can either (a) return into the liquid light collecting device, or (b) irradiate the light energy utilization device, A part of the sunlight is totally reflected from the transparent liquid in the containing cavity to the light-transmitting cavity wall, thereby concentrating the sunlight on the light energy utilization device; The solar energy utilization device is characterized in that the translucent cavity wall includes a translucent top wall and a translucent bottom wall, the first light energy utilization unit is arranged outside the translucent bottom wall, sunlight is guided to the first light energy utilization unit by the transparent liquid, and at least a portion of the sunlight is irradiated onto the second light energy utilization unit by reflection on the reflective surface.

3. 3. The solar energy utilization device according to claim 1, wherein the light-transmitting top wall or the light-transmitting bottom wall is a flat surface, a curved surface, a bent surface, or a Fresnel lens tooth surface.

4. 3. The solar energy utilization device according to claim 1, wherein the light-transmitting bottom wall has a V-shaped structure or an inverted V-shaped structure.

5. 3. The solar energy utilization device according to claim 1, wherein the reflecting surface and the light-transmitting bottom wall are provided at a distance from each other.

6. 3. The solar energy utilization device according to claim 1, wherein a portion of the light-transmitting bottom wall and a portion of the reflecting surface overlap each other.

7. The solar energy utilization device according to claim 6, characterized in that the translucent bottom wall has a V-shaped structure or an inverted V-shaped structure, and the bottom of the reflective groove and the V-shaped structure or the inverted V-shaped structure overlap each other.

8. The solar energy utilization device according to claim 1 or 2, further comprising a sealed container in which the light energy utilization device and the liquid collecting device are arranged, the sealed container having a light-transmitting surface that allows sunlight to enter the liquid collecting device from the light-transmitting surface, a working medium in contact with the light energy utilization device is provided within the sealed container, and the sealed container has a first external connection port through which the working medium enters and exits the sealed container in order to utilize the working medium.

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