Lighting device and light guide lighting system using the same

Abstract

The present application relates to a light collecting device and a light guide lighting system using the light collecting device; the light collecting device comprises a first light collecting body, a second light collecting body and a light turning body. The first light collecting body contains at least one light reflecting or refracting device and is arranged to track incident sunlight and turn the sunlight to the light turning body; the second light collecting body is orthogonal or perpendicular to the transverse central axis of the first light collecting body; the light turning body turns the incident light to other light turning bodies or light guide pipes. The light guide lighting system comprises the light collecting device, a light guide pipe, a control and driving module and a frame; the first light collecting body of the present application functions to turn the sunlight to the light turning body. The second light collecting body functions to turn the sunlight to the first light collecting body. The first light collecting body and the second light collecting body work together to track the sunlight on a single axis, achieve simple and efficient use of sunlight and improve the utilization rate of sunlight and economic benefits of the light guide lighting system.

Description

Technical Field

[0001] This invention relates to a light-collecting device for a light-guiding lighting system, and a light-guiding lighting system using the light-collecting device. Background Technology

[0002] A daylighting light guide system is a type of daylighting system that collects natural outdoor light and transmits it indoors via light guide tubes for natural lighting. This type of system typically consists of two parts: a light-collecting section and a light-guiding section. Driven by the needs of healthy, energy-efficient, and environmentally friendly buildings, the use of daylighting light guide systems for architectural lighting has become widespread.

[0003] According to the national industry group standard "Evaluation of Lighting Systems for Green Buildings (T / CECS10065-2019)," daylighting systems are classified into two categories based on whether they automatically track the sun: active and passive. This patent application mainly relates to an active daylighting system.

[0004] Passive solar light guiding systems utilize light guide tubes with reflective inner surfaces as a means of transmitting sunlight, bringing sunlight from outdoors into indoor spaces. They offer the advantage of high solar energy utilization (up to 80%). However, these systems also suffer from drawbacks such as large tube diameters and short effective transmission distances. Figure 1 This demonstrates a typical passive daylighting light guide system. When in operation, diffused light from the sky and direct sunlight strike the system, which then passes sequentially through a transparent light-collecting dome, a light guide tube, and a diffuser before entering the indoor space to provide illumination. In practical applications, most passive daylighting light guide systems have a diameter between 350-530 mm, while the transmission distance is between 2-10 meters. This means that if a passive daylighting light guide system is used horizontally, it requires at least 350-530 mm of horizontal ceiling space; and if used vertically, it requires at least 350-530 mm of vertical shaft space. This objectively results in wasted space, significantly increases the system's application cost, and severely limits its applicability, making it unsuitable for use in the high-rise buildings prevalent in China.

[0005] To overcome the shortcomings of passive solar light guiding systems, active solar light guiding systems have emerged. Currently, active solar light guiding systems on the market fall into two main categories: one based on heliostat technology and the other based on focusing fiber optic technology. Chinese invention patent CN1317675A, "Automatic Solar Tracking Light-Collecting Device," demonstrates an active solar light guiding system based on heliostat technology. Figure 3A schematic diagram of an active daylight guiding lighting system based on concentrated fiber optic technology, manufactured in Sweden, is shown. Other international examples of similar products include Japan's "Himawari" (Sunflower). Both products use movable lens groups to track the sun, focusing sunlight into optical fibers, which are then laid to the indoor spaces requiring illumination. Figure 2 and Figure 3 As shown, the working principles of these two types of systems are as follows: the former projects a light spot onto a light-collecting device at a fixed location, forming multiple reflections before guiding the light into the building; the latter directly directs the light-collecting device towards the sun, using lenses to form a thin beam before guiding it into the building. These two types of systems share two common characteristics: first, they both require two-dimensional tracking of the sun's elevation and azimuth; second, they can utilize spaces with relatively small cross-sections (within 100mm in diameter) or even without occupying interior building space for transmission, ensuring that the system can transmit sunlight to a destination within a 10-100 meter range while saving space costs, thus overcoming the application limitations of passive daylight guiding lighting systems.

[0006] However, the existing active systems mentioned above all require two-dimensional tracking of the sun in both elevation and azimuth, resulting in complex electromechanical, optical, and control systems, as well as high costs for large-area solar illumination. The technical solution proposed in this application can better solve these problems. Summary of the Invention

[0007] To address the aforementioned issues, this application proposes a solution that utilizes a one-dimensional tracking system to collect and aggregate sunlight over a large area, and then transmits the aggregated sunlight horizontally or vertically into the depths of the building (10-100 meters) through a narrow space (100mm). This solution significantly simplifies system manufacturing and reduces costs while ensuring lighting efficiency.

[0008] To solve the above problems, the technical solution adopted by the present invention is as follows:

[0009] The lighting device is special in that it includes:

[0010] The first light-collecting body contains at least one light-reflecting or refractive device and is configured to track the incident sunlight after it has been redirected and directed toward the light-redirecting body;

[0011] The second light-collecting element has its transverse central axis orthogonal to or perpendicular to the transverse central axis of the first light-collecting element; and,

[0012] A light deflector is a device that redirects incident light so that it enters other light deflectors or light guides.

[0013] Preferably, the light-collecting device further includes a third light-collecting body, which contains at least one light-reflecting or refractive device and is configured to redirect the incident light and direct it directly to the first light-collecting body, or to direct the incident light first to the second light-collecting body and then to the first light-collecting body via the second reflector.

[0014] Preferably, the orientation and position of the light reflection or refraction device contained in the third light-collecting body can be adjusted, and its transverse central axis is substantially parallel to the transverse central axis of the first light-collecting body.

[0015] Preferably, the light reflecting or refracting device contained in the third light-collecting body is configured to face north and can rotate one-dimensionally as the solar altitude angle changes.

[0016] Preferably, the second light-collecting body is composed of at least one mirror and its position can be changed by manual or electrical means, such that its mirror faces generally east in the morning and generally west in the afternoon, and during the position change, its lateral central axis and the lateral central axis of the first light-collecting body always remain orthogonal or perpendicular.

[0017] Preferably, the light deflector is a lens or a mirror or a combination thereof.

[0018] Preferably, the light deflector is a plane mirror or a curved mirror and the mirror surface faces the inlet of the light guide tube.

[0019] Preferably, the light-directing body is a one-dimensional parabolic mirror; and the first light-collecting body is a plane mirror; and let: the angle between the plane mirror and the horizontal plane be P, the altitude angle of the sun be A, the azimuth angle of the sun be B, the azimuth angle of the plane mirror normal be C, and the angle between the axis of the one-dimensional parabolic mirror and the horizontal plane be Q, then when the system is working, it controls the pitch attitude of the plane mirror and performs one-dimensional tracking of the solar altitude through the control and drive module, so that the following condition is satisfied for at least part of the time period in a year, namely: Q=atan(tanA / cos(BC))-2P.

[0020] Preferably, the light-directing body is a one-dimensional parabolic mirror; and the first light-collecting body is a plane mirror; and let: the angle between the plane mirror and the horizontal plane be P, the solar altitude angle be A, the solar azimuth angle be B, the azimuth angle of the plane mirror normal be C, and the angle between the axis of the one-dimensional parabolic mirror and the horizontal plane be Q, then when the system is working, it controls the pitch attitude of the plane mirror and performs one-dimensional tracking of the solar altitude through the control and drive module, so that the following condition is satisfied for at least part of the time period in a year, namely: Q = atan(tanA / cos(bC)) - 2P; where b is the azimuth angle value of the sunlight with solar altitude angle A and solar azimuth angle B after being jointly mirrored by the third light-collecting body and the second light-collecting body.

[0021] The light guide lighting system is unique in that it includes a light-collecting device, a light guide tube, a control and drive module, and a frame;

[0022] The lighting devices include:

[0023] The first light-collecting body contains at least one light-reflecting or refractive device and is configured to track and redirect incident sunlight toward the light-redirecting body;

[0024] The second light-collecting element has its transverse central axis orthogonal or perpendicular to the transverse central axis of the first light-collecting element; and...

[0025] A light deflector redirects incident light so that it is directed into other light deflectors or light guides.

[0026] Among them, the light guide tube is a solid or hollow tube that transmits sunlight to a specific space inside the building using the principle of reflection;

[0027] Among them, the control and drive module is responsible for controlling and adjusting the posture of the first light-collecting body contained in the light-collecting device and achieving the purpose of tracking the incident sunlight;

[0028] The frame provides housing space and a fixed load-bearing foundation for the lighting device, light guide, control and drive modules.

[0029] Preferably, the light-collecting device further includes a third light-collecting body, which contains at least one light-reflecting or refractive device and is configured to redirect the incident light and direct it directly to the first light-collecting body, or to direct the incident light first to the second light-collecting body and then to the first light-collecting body via the second reflector.

[0030] Preferably, the orientation and position of the light reflection or refraction device contained in the third light-collecting body can be adjusted, and its transverse central axis is substantially parallel to the transverse central axis of the first light-collecting body.

[0031] Preferably, the light reflecting or refracting device contained in the third light-collecting body is configured to face north and can rotate one-dimensionally as the solar altitude angle changes.

[0032] Preferably, the second light-collecting body is composed of at least one mirror and its position can be changed by manual or electrical means, such that its mirror faces generally east in the morning and generally west in the afternoon, and during the position change, its lateral central axis and the lateral central axis of the first light-collecting body always remain orthogonal or perpendicular.

[0033] Preferably, the light deflector is a lens or a mirror or a combination thereof.

[0034] Preferably, the light deflector is a plane mirror or a curved mirror and the mirror surface faces the inlet of the light guide tube.

[0035] Preferably, the light-directing body is a one-dimensional parabolic mirror; and the first light-collecting body is a plane mirror; and let: the angle between the plane mirror and the horizontal plane be P, the altitude angle of the sun be A, the azimuth angle of the sun be B, the azimuth angle of the plane mirror normal be C, and the angle between the axis of the one-dimensional parabolic mirror and the horizontal plane be Q, then when the system is working, it controls the pitch attitude of the plane mirror and performs one-dimensional tracking of the solar altitude through the control and drive module, so that the following condition is satisfied for at least part of the time period in a year, namely: Q=atan(tanA / cos(BC))-2P.

[0036] Preferably, the light-directing body is a one-dimensional parabolic mirror; and the first light-collecting body is a plane mirror; and let: the angle between the plane mirror and the horizontal plane be P, the solar altitude angle be A, the solar azimuth angle be B, the azimuth angle of the plane mirror normal be C, and the angle between the axis of the one-dimensional parabolic mirror and the horizontal plane be Q, then when the system is working, it controls the pitch attitude of the plane mirror and performs one-dimensional tracking of the solar altitude through the control and drive module, so that the following condition is satisfied for at least part of the time period in a year, namely: Q = atan(tanA / cos(bC))-2P; where b is the azimuth angle value of the light rays formed after the sunlight with the solar altitude angle A and the solar azimuth angle B is jointly mirrored by the third light-collecting body and the second light-collecting body.

[0037] The beneficial effects of this invention are as follows: Without significantly occupying the interior space of a building, this application proposes a solution that utilizes a one-dimensional tracking system to collect and aggregate sunlight over a large area, and then transmits the aggregated sunlight horizontally or vertically deep into the building (10-100 meters) through a narrow space (100mm). This significantly simplifies system manufacturing and reduces costs while ensuring lighting efficiency. The multiple light-collecting elements within the system work in a unique coordinated manner, tracking the sun's azimuth angle within a 0-300 degree range to maximize the utilization of direct sunlight from both the north and south directions, further improving the sunlight utilization efficiency of the light-guiding lighting system. Attached Figure Description

[0038] Figure 1 A typical existing passive solar light guide lighting system;

[0039] Figure 2 An active solar light guiding illumination system based on heliostat technology;

[0040] Figure 3 : An existing active solar light guide lighting system based on concentrated fiber technology;

[0041] Figure 4 : A schematic diagram of the structure of the first embodiment of this application;

[0042] Figure 5 : A schematic diagram of the working principle of the first embodiment of this application (the sun is due south);

[0043] Figure 6 : A side view of the working principle diagram of the first embodiment of this application (sun is due south);

[0044] Figure 7 : A top view of the working principle diagram of the first embodiment of this application (sun is due south);

[0045] Figure 8 : A side view of the working principle diagram of the first embodiment of this application (sun on the southwest side);

[0046] Figure 9 : A top view of the working principle diagram of the first embodiment of this application (sun on the southwest side);

[0047] Figure 10 : A structural diagram of the second embodiment of this application;

[0048] Figure 11 : A top view of the working principle diagram of the second embodiment of this application (sun on the north side);

[0049] Figure 12 : A top view of the working principle of the second embodiment of this application (sun on the north side);

[0050] Figure 13 : A schematic diagram of a practical application scenario based on the first embodiment of this application;

[0051] Figure 14 The third embodiment of this application is shown in the structural and operational principle diagram.

[0052] Figure 15: Structural and operational principle diagram of the fourth embodiment of this application;

[0053] Figure 16: A schematic diagram of the actual application scenario after rotation based on the fourth embodiment of this application.

[0054] In the diagram: 1. Light-collecting device; 2. Light guide tube; 3. Control and drive module; 4. Frame; 5. First light-collecting body; 6. Third light-collecting body; 7. Light-directing body; 8. Lateral central axis of the first light-collecting body; 9. Lateral central axis of the third light-collecting body; 10. Second light-collecting body; 11. Lateral central axis of the second light-collecting body; 12. One-dimensional parabolic mirror contained in the light-directing body; 13. Plane mirror contained in the first light-collecting body; 14. Axis of the one-dimensional parabolic mirror; P. Angle between the plane mirror and the ground; A. Solar altitude angle; B. Solar azimuth angle; C. Azimuth angle of the plane mirror normal; Q. Angle between the axis of the one-dimensional parabolic mirror and the ground; 19. North-South line; 20. Projection line of the plane mirror normal onto the plane; 22. Multi-mirror assembly; 23. A building. Detailed Implementation

[0055] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0056] Existing technologies for tracking the sun and directing sunlight to designated lighting areas or transmission channels rely on relatively expensive two-axis systems. In the vertical dimension, the two-axis system tracks the sun's altitude (A); in the horizontal dimension, it tracks the sun's azimuth (B). The solution proposed in this embodiment eliminates the need for a two-axis system. Instead, it uses a single-axis system to perform one-dimensional tracking of the sun's altitude (A), achieving the goal of focusing sunlight and directing it into a sunlight transmission channel.

[0057] Figure 4 The first embodiment of the invention is shown. (See figure) Figure 4As shown, a light-collecting device 1, a light guide tube 2, and a control and drive module 3 are fixed in frame 4. The light-collecting device 1 includes a first light-collecting body 5, a light-deflecting body 7, and a second light-collecting body 10. In this embodiment, the first light-collecting body 5 contains a light-reflecting plane mirror, labeled as the plane mirror 13 contained in the first light-collecting body. Under the action of the control and drive module 3, the mirror rotates around the transverse central axis 8 of the first light-collecting body and tracks the solar altitude angle A, redirecting the incident sunlight towards the light-deflecting body 7. In this embodiment, the second light-collecting body 10 is a plane mirror, with its transverse central axis 11 perpendicular to the transverse central axis 8 of the first light-collecting body. In this embodiment, the light-deflecting body 7 is a one-dimensional parabolic mirror, labeled as the one-dimensional parabolic mirror 12 contained in the light-deflecting body. It converges the incident sunlight and directs at least a portion of it into the light guide tube 2, which then further transmits the sunlight to the spaces inside the building that ultimately require illumination. In this embodiment, the control and drive module 3 is responsible for controlling and rotating the attitude of the first light-collecting body 5 contained in the light-collecting device 1, and achieving the purpose of one-dimensional tracking of the pitch angle of the incident sunlight.

[0058] Figure 5 The working principle of the first embodiment of this application is demonstrated (the sun is due south). For example... Figure 5 As shown, under the action of the control and drive module 3, the plane mirror 13 contained in the first light-collecting body forms a certain angle with the sunlight incident from the due south direction, so that the two parallel sunlight beams are reflected onto the light-deflecting body 7, that is, the one-dimensional parabolic mirror 12 contained in the light-deflecting body, and then converged into the interior of the light guide tube 2.

[0059] Figure 6 A side view showing the working principle of the first embodiment of this application (sun is due south). Figure 7 A top view illustrating the working principle of the first embodiment of this application (sun due south). (See diagram below.) Figure 6 and Figure 7 As shown, under the control and drive module 3, the first light-collecting body 5, i.e., the plane mirror 13 contained in the first light-collecting body, forms a certain angle with the sunlight incident from the due south direction, so that the two parallel beams of sunlight are reflected onto the light-directing body 7, i.e., the one-dimensional parabolic mirror 12 contained in the light-directing body, and then converged into the light guide 2. The figure shows the axis 14 of the one-dimensional parabolic mirror 12. At this time, the solar azimuth angle is 180º, and the relationship between the angle P between the plane mirror 13 contained in the first light-collecting body and the ground, the solar altitude angle A, the azimuth angle C of the plane mirror normal, and the angle Q between the axis of the one-dimensional parabolic mirror and the ground satisfies the following condition: Q = atan(tanA / cos(180º-C)) - 2P. Wherein, the azimuth angle C of the plane mirror normal is... Figure 7 The details are explained in the text.

[0060] like Figure 7As shown, the north-south line 19 indicates the due south and due north directions, with the sun located due south at an azimuth angle of 180°. The azimuth angle C of the plane mirror normal is the azimuth angle of the projection line 20 of the plane mirror normal onto the plane. As shown in the figure, a beam of sunlight from due south is reflected by the first light-collecting body 5, i.e., the plane mirror 13 contained in the first light-collecting body, and then directed to the light-directing body 7, i.e., the one-dimensional parabolic mirror 12 contained in the light-directing body. The one-dimensional parabolic mirror 12 contained in the light-directing body then reflects the sunlight into the interior of the light guide tube 2.

[0061] like Figure 8 A schematic diagram illustrating the working principle of the first embodiment of this application in the afternoon when the sun is in the southwest is shown. (See diagram.) Figure 8 As shown, sunlight first shines on the second light-collecting body 10 located on the east side, and is then reflected onto the first reflector 5, i.e., the plane mirror 13 contained in the first light-collecting body. Then, the plane mirror redirects the sunlight to the light-deflecting body, i.e., the one-dimensional parabolic mirror 12 contained in the light-deflecting body, and the sunlight is then focused into the interior of the light guide tube 2. Figure 9 The process of sunlight entering the light guide tube 2 after multiple reflections is shown from a top-down perspective.

[0062] Figure 9 A top view illustrating the working principle of the first embodiment of this application (sun in the southwest). (See attached image.) Figure 9 As shown, north-south line 19 indicates true north and south, the sun is located in the southwest, and the azimuth angle B of the sun is the angle between its location and north-south line 19; the azimuth angle C of the plane mirror normal is the azimuth angle of the projection line 20 of the plane mirror normal onto the plane. As shown in the figure, a beam of sunlight from the southwest is reflected by the second light-collecting body 10 onto the plane mirror 13 contained in the first light-collecting body. The plane mirror 13 contained in the first light-collecting body reflects the sunlight and projects it onto the light-directing body 7, that is, the one-dimensional parabolic mirror 12 contained in the light-directing body; the one-dimensional parabolic mirror then reflects the sunlight into the interior of the light guide tube 2.

[0063] like Figure 8 and Figure 9 In the embodiment shown, assuming the azimuth angle of the sun is B, the angle between the plane mirror and the ground is P, the altitude angle of the sun is A, the azimuth angle of the plane mirror normal is C, and the angle between the axis of the one-dimensional parabolic mirror and the ground is Q, the system controls the pitch attitude of the first reflector 5, i.e. the plane mirror 13 contained in the first light-collecting body, through the control and drive module 3 and performs one-dimensional tracking of the sun altitude, so that the following condition is satisfied: Q = atan(tanA / cos(BC)) - 2P.

[0064] Figure 10 This is a structural diagram of the second embodiment of this patent application. (As shown) Figure 10As shown, the difference between this embodiment and the first embodiment is that a third light-collecting body 6 is added on the south side, and the transverse central axis 9 of the third light-collecting body is parallel to the transverse central axis 8 of the first light-collecting body.

[0065] Figure 11 The working principle of the second embodiment is demonstrated. For example... Figure 11 As shown, when the sun is located on the north side of the sky in the morning or evening of summer, the sunlight first shines on the second light-collecting body 10 located on the east side, and then shines on the third light-collecting body 6 located on the south side after being turned by it. Then the third light-collecting body 6 turns the sunlight to shine on the first light-collecting body 5, and it is reflected by it to the light-reflecting body 7. Finally, the light-reflecting body 7 turns the sunlight into the light guide tube 2. Figure 12 The working principle and process described above are further explained in the form of a side view.

[0066] In the second embodiment, when the system is working, it controls the pitch attitude of the first reflector 5, i.e. the plane mirror 13 contained in the first light-collecting body, through the control and drive module 3, and performs one-dimensional tracking of the solar altitude, so that the following condition is satisfied: Q = atan(tanA / cos(bC)) - 2P; where b is the azimuth angle value of the light rays formed after the sunlight with altitude angle and azimuth angle is jointly mirrored by the third light-collecting body 6 and the second light-collecting body 10.

[0067] Figure 13 This demonstrates a practical application scenario of this patent application. For example... Figure 13 As shown, a first embodiment of the present invention is placed in the underground space on the south side of a building 23. As shown in the figure, sunlight shines on the first light-collecting body 5 and the second light-collecting body 10 and is then directed onto the light-deflecting body 7. The sunlight is then deflected and directed into the light guide tube 2 and travels through the light guide tube into the underground space of the building 23, thereby serving to provide illumination using natural light.

[0068] Figure 14 The third embodiment of this patent application is shown. The difference between this embodiment and the second embodiment is that the attitude and position of the light reflecting device included in the third light-collecting body 6 can be automatically adjusted according to the sun's pitch angle by being driven by the control and drive module 3.

[0069] Figure 15 The fourth embodiment of this patent application is shown. The difference between this embodiment and the first embodiment is that the first light-collecting body 5 is composed of multiple mirror groups 22, which are linked together under the control and drive module 3 to synchronously track the position of the sun and direct sunlight onto the light-directing body 7. When the multiple mirror groups 22 are parallel, the parallel light characteristics of sunlight can be maintained; however, when they are not parallel, the sunlight may become converging light. Therefore, the light-directing body 7 should be made of heat-resistant material to prevent damage from the converging sunlight.

[0070] like Figure 16 As shown, this example can also be rotated as a whole and installed on the roof of a building according to actual application needs, so that the direction of the light guide tube 2 changes from horizontal to vertical, and transmits sunlight from the roof to the basement.

[0071] Therefore, without significantly occupying the building's interior space, this application proposes a solution that utilizes a simple and inexpensive one-dimensional tracking system to collect and aggregate sunlight over a large area, and then transmits the aggregated sunlight horizontally or vertically into the depths of the building (10-100 meters) through a narrow space (100mm). This solution significantly simplifies system manufacturing and reduces costs while ensuring lighting efficiency. The multiple light-collecting elements within the system work in a unique coordinated manner, tracking the sun's azimuth angle within a 0-300 degree range to maximize the utilization of direct sunlight from both the north and south directions. Therefore, this invention significantly improves the utilization efficiency of sunlight in light-guiding lighting systems while also increasing cost-effectiveness, effectively solving a developmental challenge in light-guiding systems.

[0072] This invention is not limited to the embodiments discussed above. The above description of specific embodiments is intended to describe and illustrate the technical solutions involved in this invention. Obvious modifications or substitutions based on the teachings of this invention should also be considered to fall within the protection scope of this invention. The above specific embodiments are used to disclose the best implementation methods of this invention, so that those skilled in the art can apply various embodiments and alternatives of this invention to achieve the objectives of this invention.

Claims

1. Daylighting device, characterized in that include: The first light-collecting body contains at least one light-reflecting or refractive device and is configured to track the incident sunlight after it has been redirected and directed toward the light-redirecting body; The second light-collecting element is composed of at least one mirror and is capable of positional change, wherein its lateral central axis remains perpendicular to the lateral central axis of the first light-collecting element during the positional change; and, A light deflector is a device that redirects incident light so that it enters other light deflectors or light guides.

2. The light-collecting device as described in claim 1, characterized in that... The light-collecting device further includes a third light-collecting body, which contains at least one light-reflecting or refractive device and is configured to redirect the incident light and direct it directly to the first light-collecting body, or to direct the incident light first to the second light-collecting body and then to the first light-collecting body via the second reflector.

3. The light-collecting device as described in claim 2, characterized in that, The orientation and position of the light reflection or refraction device contained in the third light-collecting body can be adjusted, and its transverse central axis is parallel to the transverse central axis of the first light-collecting body.

4. The light-collecting device as described in claim 2, characterized in that, The light-reflecting or refractive device contained in the third light-collecting body is configured to face north and can rotate one-dimensionally as the solar altitude angle changes.

5. The light-collecting device as described in claim 1, characterized in that, The mirror of the second light-collecting body faces east in the morning and west in the afternoon.

6. The light-collecting device as described in claim 1, characterized in that, The light-directing element is a lens or a mirror or a combination thereof.

7. The light-collecting device as described in claim 1, characterized in that... The light-directing body is a plane mirror or a curved mirror with the mirror surface facing the entrance of the light guide tube.

8. The light-collecting device as described in claim 1, characterized in that... The light-directing body is a one-dimensional parabolic mirror; and the first light-collecting body is a plane mirror; and let: the angle between the plane mirror and the horizontal plane be P, the altitude angle of the sun be A, the azimuth angle of the sun be B, the azimuth angle of the plane mirror normal be C, and the angle between the axis of the one-dimensional parabolic mirror and the horizontal plane be Q. Then, when the system is working, it controls the pitch attitude of the plane mirror and performs one-dimensional tracking of the solar altitude through the control and drive module, so that the following condition is satisfied for at least part of the time period in a year, namely: Q=atan(tanA / cos(BC))-2P.

9. The light-collecting device as described in claim 2, characterized in that... The light-directing body is a one-dimensional parabolic mirror; and the first light-collecting body is a plane mirror; and let: the angle between the plane mirror and the horizontal plane be P, the solar altitude angle be A, the solar azimuth angle be B, the azimuth angle of the plane mirror normal be C, and the angle between the axis of the one-dimensional parabolic mirror and the horizontal plane be Q. Then, when the system is working, it controls the pitch attitude of the plane mirror and performs one-dimensional tracking of the solar altitude through the control and drive module, so that the following condition is satisfied for at least part of the time period in a year, namely: Q = atan(tanA / cos(bC))-2P; where b is the azimuth angle value of the sunlight with solar altitude angle A and solar azimuth angle B after being jointly mirrored by the third light-collecting body and the second light-collecting body.

10. A light guide illumination system characterized in that, Includes light-collecting devices, light guides, control and drive modules, and a frame; The light-collecting device is the light-collecting device according to any one of claims 1-9; The light guide tube is a solid or hollow tube that transmits sunlight to a specific space inside the building using the principle of reflection. The control and drive module contains a light position sensor and a central processing unit, which are responsible for controlling and adjusting the posture of the first light-collecting body contained in the light-collecting device and achieving the purpose of tracking the incident sunlight. The frame is used to provide housing space and a fixed load-bearing foundation for the light-collecting device, light guide tube, control and drive module.

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