Solar energy collection and storage device

Abstract

The invention provides a solar energy collecting and storing device which comprises a first concave mirror and a second concave mirror with the mirror face facing the mirror face of the first concave mirror. The focus of the first concave mirror coincides with the focus of the second concave mirror. A light through hole is formed in the intersection of the optical axis of the first concave mirror and the first concave mirror; the heat storage box body is arranged on one side of the back surface of the first concave mirror; a columnar light channel is arranged in the heat storage box body, an opening in the first end of the light channel is communicated with the light inlet hole, the second end of the light channel is a closed bottom, and a reflecting mirror capable of reflecting light from the light inlet hole to the side wall of the light channel is arranged at the bottom of the light channel. And a heat exchange pipe for a heat exchange medium to flow is arranged between the side wall of the light channel and the inner wall of the heat storage box body. The technical scheme can be applied to the field of solar energy utilization.

Description

Technical Field

[0001] The invention relates to the technical field of solar energy utilization, in particular to a device for collecting and storing solar energy. Background Art

[0002] As an energy source, solar energy has the advantages of being renewable, clean, safe and reliable. Solar thermal technology is a relatively common and low-cost solar energy utilization technology. Solar thermal technology refers to the technology of converting solar radiation energy into thermal energy for utilization. It usually uses specific devices, such as solar collectors, to absorb the energy of sunlight, and then transfers the heat to usable media such as water through heat exchange, thereby realizing the utilization of solar energy.

[0003] Existing solar thermal products all use collectors. Collectors are mainly divided into two types: vacuum tubes and collector plates. Existing collectors are prone to damage. For example, vacuum tubes are more vulnerable to wind and sand, especially outdoors, and are prone to tube damage. Summary of the invention

[0004] In order to solve the problem of easy damage of collectors in the existing solar thermal technology, the present invention provides a solar energy collection and storage device.

[0005] The technical solution of the present invention is as follows:

[0006] A solar energy collection and storage device comprises a first concave mirror, and also comprises a second concave mirror with a mirror surface facing the mirror surface of the first concave mirror; the optical axis of the first concave mirror is coaxially arranged with the optical axis of the second concave mirror; the focus of the first concave mirror coincides with the focus of the second concave mirror; a light hole is arranged at the intersection of the optical axis of the first concave mirror and the first concave mirror; and also comprises a heat storage box arranged on one side of the back of the first concave mirror, a light entrance hole is arranged on the wall of the heat storage box, and the light entrance hole is arranged toward the light entrance hole; a columnar light channel is arranged in the heat storage box, the opening of the first end of the light channel is connected with the light entrance hole, the second end of the light channel is a closed bottom, and a reflector capable of reflecting light from the light entrance hole to the side wall of the light channel is arranged at the bottom of the light channel; the axis of the light channel coincides with the extension line of the optical axis of the second concave mirror; a heat exchange pipe for heat exchange medium to flow is arranged between the side wall of the light channel and the inner wall of the heat storage box.

[0007] Optionally, a structure protruding toward the light entrance hole is provided at the bottom of the light channel; and the reflector is provided on the surface of the structure.

[0008] Optionally, the structure comprises a cone.

[0009] Optionally, the material of the side wall of the optical channel includes a good thermal conductor material.

[0010] Optionally, a heat absorbing coating is provided on the inner surface of the side wall of the light channel.

[0011] Optionally, heat-conducting fins are arranged on the outer side of the side wall of the light channel; and the heat-conducting fins are extended toward the inner wall of the heat storage box.

[0012] Optionally, the thermal conductive fin comprises a long sheet-shaped body, and the minimum angle between a straight line where the width direction of the thermal conductive fin lies and a straight line parallel to the axis of the light channel is an acute angle.

[0013] Optionally, a heat storage body is arranged in the space between the light channel and the inner wall of the heat storage box.

[0014] Optionally, a heat-insulating layer is provided on the wall of the heat storage box.

[0015] Optionally, an exhaust valve that can connect the space inside and outside the heat storage box is arranged on the wall of the heat storage box.

[0016] Optionally, the first concave mirror is in a spherical cap shape, and a light-transmitting dust cover is provided at the bottom of the spherical cap; an edge of the light-transmitting dust cover is sealed and connected to an edge of the first concave mirror.

[0017] Optionally, a long strip of descaling brush is provided on the light-transmitting dust cover; one end of the descaling brush is connected to the rotating mechanism.

[0018] Optionally, a metal mesh surrounding the light channel is fixedly arranged between the inner wall of the heat storage box and the light channel.

[0019] Optionally, a heat dissipation device is provided on the back side of the second concave mirror.

[0020] Optionally, the heat dissipation device includes a shell that is buckled onto the back side of the second concave mirror, forming a cavity between the shell and the second concave mirror; a recess concave toward the shell is provided at the connection between the shell and the back side of the second concave mirror; a heat dissipation fan is provided on the shell; the air inlet of the heat dissipation fan is provided inside the shell, and the air outlet of the heat dissipation fan is provided outside the shell; or the air outlet of the heat dissipation fan is provided inside the shell, and the air inlet of the heat dissipation fan is provided outside the shell.

[0021] Optionally, the heat exchange tube comprises a spiral tube surrounding the light channel.

[0022] The technical effects of the present invention are as follows:

[0023] The technical solution of the present invention utilizes two opposite concave mirrors to project the sunlight collected on the first concave mirror to the bottom of the light channel. A reflector is provided at the bottom of the light channel to reflect the light to the side wall of the light channel, so that the side wall of the light channel is heated by the collected sunlight. The side wall of the light channel then transfers the heat to the heat exchange tube in the space between it and the heat storage tank, and exchanges heat with the heat exchange medium in the heat exchange tube, thereby realizing the collection and utilization of solar energy. The concave mirror used in the technical solution of the present invention has a simple structure and high reliability; the light channel part is arranged inside the heat storage tank, which isolates it from the influence of adverse factors such as external wind and sand, and has a long service life, thereby achieving the purpose of the present invention.

[0024] The further effects of the above optional manner will be described below in conjunction with the specific implementation manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a structural principle diagram of the first embodiment of the solar energy collection and storage device of the present invention.

[0026] Figure 2 for Figure 1 Schematic diagram of the external structure of the embodiment shown.

[0027] Figure 3 for Figure 1 The structural principle diagram of the heat dissipation device in the embodiment shown.

[0028] Figure 4 for Figure 1 The structural principle diagram of the descaling brush in the embodiment shown.

[0029] Figure 5 This is a structural principle diagram of the second embodiment of the solar energy collection and storage device of the present invention.

[0030] Figure 6 for Figure 5 A perspective view of the illustrated embodiment from one angle.

[0031] Figure 7 for Figure 5 A cross-sectional view of a swivel joint in the illustrated embodiment.

[0032] Figure 8 for Figure 5 Schematic diagram of the internal structure of the heat storage box in the embodiment shown.

[0033] The symbols in the figure are explained as follows:

[0034] 101, second concave mirror; 102, first concave mirror; 103, exhaust valve; 104, heat storage box; 105, heat storage body; 106, reflector; 107, metal mesh; 108, light channel; 109, heat exchange tube; 110, heat conduction fin; 111, light entrance hole; 112, light through hole;

[0035] 201, descaling brush; 202, housing; 203, driving motor; 204, light-transmitting dust cover; 205, first concave mirror bracket; 206, elevation adjustment mechanism; 207, annular track;

[0036] 301, cooling fan; 302, vent; 303, notch;

[0037] 501, roller bracket; 502, heat storage box; 503, box support frame; 504, drive motor; 505, transmission mechanism; 506, rotary pipe joint;

[0038] 701, first access hole of the fixing part; 702, first cavity of the fixing part; 703, second cavity of the fixing part; 704, second access hole of the fixing part; 705, access hole of the first pipe; 706, access hole of the second pipe; 707, second pipe; 708, first pipe; 709, access hole of the first pipe;

[0039] 801, heat-conducting fins; 802, heat exchange tubes; 803, optical channels. DETAILED DESCRIPTION

[0040] The technical solution of the present invention is described in detail below in conjunction with the embodiments shown in the accompanying drawings.

[0041] Figure 1 The principle of an embodiment of the solar energy collection and storage device of the present invention is shown. Figure 1 As shown, the solar energy collection and storage device includes a first concave mirror 102 and a second concave mirror 101. The mirror size of the second concave mirror 101 is smaller than that of the first concave mirror 102. The mirror surface (i.e., the concave surface) of the first concave mirror 102 is arranged opposite to the mirror surface of the second concave mirror 101. In addition, the optical axis of the first concave mirror 102 and the optical axis of the second concave mirror 101 are on the same straight line, that is, the optical axis of the first concave mirror 102 is coaxial with the optical axis of the second concave mirror 101. The optical axis of the concave mirror is a straight line passing through the center of the spherical surface of the concave mirror, which is the geometric center axis of the concave mirror and the optical symmetry axis of the concave mirror. The focus of the first concave mirror 102 coincides with the focus of the second concave mirror. The concave mirror is in the shape of a spherical crown, and a light hole 112 penetrating the first concave mirror 102 is arranged at the vertex of the spherical crown of the first concave mirror 102, that is, at the intersection of the optical axis of the first concave mirror 102 and the first concave mirror 102.

[0042] Figure 1The solar energy collection and storage device shown also includes a heat storage box 104 arranged on the back side of the first concave mirror 102. The back side of the concave mirror described in the present invention refers to the convex surface opposite to the mirror surface of the concave mirror. In this embodiment, the heat storage box 104 is a cylindrical container. The outer layer of the heat storage box 104 is provided with a heat preservation layer, that is, a protective layer made of heat preservation material to reduce the heat exchange between the inside and outside of the heat storage box 104. A light entrance hole 111 is provided at one end of the cylindrical heat storage box 104, and the other end of the heat storage box 104 is a closed end. The light entrance hole 111 and the light through hole 112 are arranged opposite to each other, and the straight line where the optical axis of the first concave mirror 102 is located passes through the center of the light entrance hole 111 and the center of the light through hole 112 respectively. A light channel 108 with one end closed and the other end open is provided inside the heat storage box 104. The light channel 108 is a cylindrical space, and the central axis of the cylinder is on the same straight line as the optical axis of the first concave mirror 102. The opening of the light channel 108 coincides with the light entrance hole 111 to form a through hole. The inner surface of the closed end of the light channel 108 is the bottom of the light channel 108. The bottom of the light channel 108 is in a conical shape, and the cone protrudes toward the inside of the light channel 108, and the vertex of the cone is on the straight line where the optical axis of the first concave mirror 102 is located, and the axis of the cone coincides with the straight line where the optical axis of the first concave mirror 102 is located. A mirror surface that can reflect light is set on the surface of the cone to form a reflector 106. A heat-absorbing coating is set on the inner surface of the side wall of the heat storage box 104. The heat-absorbing coating can be painted with a dark paint. In this embodiment, the material of the heat-absorbing coating is graphite emulsion or a graphite plate. The light channel 108 is made of a good thermal conductor material. In this embodiment, the light channel 108 is made of carbon steel. A plurality of heat conducting fins 110 extending toward the inner surface of the heat storage box 104 are arranged on the outer surface of the light channel 108, that is, the heat conducting fins 110 are arranged in the space between the light channel 108 and the inner wall of the heat storage box 104. The heat conducting fins 110 are made of carbon steel and welded to the outer wall of the light channel 108.

[0043] Inside the heat storage tank 104, the space between the light channel 108 and the inner wall of the heat storage tank 104 is filled with a heat storage body 105. The heat storage body 105 is a heat storage material, and gravel is used in this embodiment, and concrete mixed with gravel and lime can also be used. A heat exchange tube 109 is also provided in the space between the light channel 108 and the inner wall of the heat storage tank 104. The heat exchange tube 109 is arranged spirally around the light channel 108, and the heat exchange tube 109 is arranged in the heat storage body 105. The heat exchange tube 109 is provided with an inlet and an outlet, and the inlet and the outlet are respectively connected to the water circulation system outside the heat storage tank 104, and the circulating water as the heat exchange medium can flow in the heat exchange tube 109. The heat storage tank 104 is also provided with an exhaust valve 103 that can connect the space between the light channel 108 and the inner wall of the heat storage tank 104 with the outside of the heat storage tank 104. A metal mesh 107 surrounding the light channel 108 is fixedly disposed in the space between the light channel 108 and the inner wall of the heat storage box 104 .

[0044] The following is through Figure 1 The description of the working process of the illustrated embodiment further illustrates the technical solution of the present invention.

[0045] Figure 1 The line with an arrow in the figure represents the transmission path of light, and the arrow represents the transmission direction of light. The first concave mirror 102 faces the sun. After the sunlight is incident on the mirror surface of the first concave mirror 102, it is collected and reflected on the mirror surface of the second concave mirror 101. The light reflected on the mirror surface of the second concave mirror 101 is further collected into parallel light and enters the light channel 108 through the light entrance hole 111 and the light through hole 112, and irradiates the reflector 106. Since the mirror surface of the reflector 106 is inclined to the parallel light projected from the second concave mirror 101, the reflector 106 can further reflect the projected light onto the inner wall of the light channel 108. Continuous illumination causes the light channel 108 and the heat-conducting fins 110 to continuously heat up, transferring heat to the heat storage body 105. The heat-conducting fins 110 increase the heat transfer area and improve the efficiency of heat transfer.

[0046] The heat storage body 105 can store a certain amount of energy, and can also transfer heat to the circulating water in the heat exchange tube 109 through heat exchange. The energy carried by the heated circulating water can be further utilized, thereby effectively utilizing solar energy. When the air in the space where the heat storage body 105 is located expands due to temperature rise, the pressure in the space can be adjusted by opening the exhaust valve 103.

[0047] The metal mesh 107 plays a role in stabilizing the heat storage body 105. When the heat storage body 105 is concrete, the metal mesh 107, as a support frame structure, can form a supporting force inside the heat storage box 104, dispersing the pressure of the concrete on the wall of the heat storage box 104. When the heat storage body 105 is gravel, since the gravel is fluid, when the heat storage box 104 adjusts the angle, the metal mesh 107 can bear part of the impact force generated by the flowing gravel, reducing the impact force of the gravel on the wall of the heat storage box 104. In addition, the spiral structure of the heat exchange tube 109 itself also plays a role in stirring the gravel when the gravel flows, accelerating the heat exchange between the gravel and improving the overall heat exchange efficiency.

[0048] Figure 2 Shows Figure 1 The external structure of the embodiment shown. The first concave mirror bracket 205 is used to lay the first concave mirror 102. The first concave mirror bracket 205 is connected to the heat storage box 104 by four support rods. The heat storage box 104 is arranged on a support frame with rollers, and an elevation adjustment mechanism 206 is arranged on the support frame. The elevation adjustment mechanism 206 is used to adjust the angle of the heat storage box 104, and then adjust the angle of the first concave mirror bracket 205, so that the mirror surface of the first concave mirror 102 can face the sun. The support frame with rollers is placed on a circular track 207 so as to adjust the angle of the mirror surface of the first concave mirror 102 facing the sun in this degree of freedom.

[0049] from Figure 1 and Figure 2 It can be seen that the bottom position of the first concave mirror 102 in the shape of a spherical crown, that is, above the mirror surface of the first concave mirror 102, is provided with a light-transmitting dust cover 204 covering the bottom of the first concave mirror 102. The edge of the light-transmitting dust cover 204 is sealed with the edge of the first concave mirror 102. The light-transmitting dust cover 204 can prevent the impact of wind and sand on the mirror surface of the first concave mirror 102, as well as the accumulation of dust on the first concave mirror 102, thereby improving the use efficiency and service life of the solar energy collection and storage device. A descaling brush 201 is provided on the outer surface of the light-transmitting dust cover 204. Figure 4 The descaling brush 201 is a long strip brush, one end of which is connected to the driving motor 203, and the other end is a free end. The driving motor 203 is arranged at the center of the circular light-transmitting dust cover 204, and can drive the descaling brush 201 to rotate with the driving motor 203 as the selection center, so as to scrub the surface of the light-transmitting dust cover 204 to keep the light-transmitting dust cover 204 with high light transmittance.

[0050] As mentioned above, the second concave mirror 101 has a small size and a small heat dissipation area. At the same time, it collects all the sunlight received by the first concave mirror 101 during operation. Therefore, an additional heat dissipation device is required to dissipate heat to avoid damage caused by excessive temperature. Figure 2 and Figure 3 , a heat dissipation device is arranged on the back of the second concave mirror 101. The heat dissipation device includes a shell 202 buckled on the back of the second concave mirror 101. A cavity is formed between the shell 202 and the second concave mirror 101. A plurality of inwardly concave notches 303 are arranged on the shell 202 at the joint of the shell 202 and the second concave mirror 101. A vent 302 is arranged on the shell 202. A heat dissipation fan 301 is arranged at the vent 302, so that the exhaust port of the heat dissipation fan 301 is arranged toward the space between the shell 202 and the second concave mirror 101, and the air inlet of the heat dissipation fan 301 is arranged outside the shell 202. When the heat dissipation fan 301 is working, the heat dissipation fan 301 blows the flowing air into the space between the shell 202 and the second concave mirror 101, and then discharges it from the notch 303 to dissipate heat for the second concave mirror 101. In other embodiments, the following arrangement may be made: the heat dissipation fan 301 is arranged at the vent 302, so that the air inlet of the heat dissipation fan 301 is arranged toward the space between the housing 202 and the second concave mirror 101, and the air outlet of the heat dissipation fan 301 is arranged outside the housing 202. When the heat dissipation fan 301 is working, a negative pressure is formed in the space between the housing 202 and the second concave mirror 101, and the external air enters the space between the housing 202 and the second concave mirror 101 through the recess 303, and then is discharged from the housing 202 through the air inlet and the air outlet of the heat dissipation fan 301. This process forms a continuous flow of wind on the back of the second concave mirror 101, thereby dissipating heat for the second concave mirror 101.

[0051] Figures 5 to 7 A second embodiment of the present invention is shown. Figure 5 and Figure 6 As shown, Figure 1 Compared with the first embodiment shown, the difference of the solar energy collection and storage device of the second embodiment is that a structure is added to realize the rotation function of the heat storage box 502. The structure includes a box support frame 503, a roller bracket 501, a drive motor 504, a transmission mechanism 505 and a rotating pipe joint 506. Among them, the heat storage box 502 is mounted on the box support frame 503. The box support frame 503 and the heat storage box 502 have two rolling support contact positions: one is contacting the heat storage box 502 through the roller bracket 501, and the other is a position adjacent to the rotating pipe joint 506.

[0052] like Figure 5 As shown, the driving motor 504 drives the heat storage box 502 to rotate through the transmission mechanism 505. When the heat storage box 502 rotates, it is necessary to ensure that the heat exchange medium in the heat exchange tube (not shown in the figure) in the heat storage box 502 can flow in and out smoothly, and a rotating pipe joint 506 is provided for this purpose.

[0053] Figure 7The specific structure of the rotating pipe joint 506 is further shown. Figure 7 As shown, the rotating pipe joint 506 includes a fixed part and a rotating part. The rotating part is connected to the heat exchange pipe in the heat storage box 502, and the fixed part is connected to the heat exchange medium pipeline outside the heat storage box 502.

[0054] like Figure 7 As shown, the rotating member includes two sections of pipes that are connected to each other and are not connected: a first pipe 708 and a second pipe 707. The first pipe 708 is provided with a first pipe inlet and outlet hole 705 and a first pipe inlet and outlet hole 709, which serve as the outlet and inlet holes of the heat exchange medium, respectively. The second pipe 707 is provided with a second pipe inlet and outlet hole 706, and another second pipe inlet and outlet hole provided on the second pipe 707 is not shown in the figure, which serves as the outlet and inlet hole of the heat exchange medium, respectively. The first pipe inlet and outlet hole 709 is connected to the heat exchange pipe in the heat storage tank 502; the second pipe inlet and outlet hole (not shown in the figure) is connected to the heat exchange pipe in the heat storage tank 502.

[0055] like Figure 7 As shown, the fixing member includes two unconnected cavities: a first fixing member cavity 702 and a second fixing member cavity 703. A first fixing member inlet and outlet hole 701 is provided on the first fixing member cavity 702. The first fixing member inlet and outlet hole 701 is connected to the heat exchange medium pipeline outside the heat storage tank 502. A second fixing member inlet and outlet hole 704 is provided on the second fixing member cavity 703. The second fixing member inlet and outlet hole 704 is connected to the heat exchange medium pipeline outside the heat storage tank 502. The rotating member penetrates the fixing member, wherein one end of the first pipe 708 extends into the second fixing member cavity 703, and the first pipe 708 is connected to the second fixing member cavity 703 through the first pipe inlet and outlet hole 705. The first pipe 708 is provided with a sealing structure at the separation between the first fixing member cavity 702 and the second fixing member cavity 703. The second pipe 707 extends into the first cavity 702 of the fixing member, and is connected to the first cavity 702 of the fixing member through the second pipe inlet and outlet hole 706. A sealing structure is provided between the second pipe 707 and the fixing member.

[0056] The heat exchange medium in the heat exchange tube in the heat storage tank 502 is communicated with the heat exchange medium pipeline outside the heat storage tank 502 through the first pipeline inlet and outlet hole 709, the first pipeline 708, the first pipeline inlet and outlet hole 705, the second cavity 703 of the fixing part, and the second inlet and outlet hole 704 of the fixing part. The heat exchange medium in the heat exchange tube in the heat storage tank 502 is communicated with the heat exchange medium pipeline outside the heat storage tank 502 through the second pipeline inlet and outlet hole (not shown in the figure), the second pipeline 707, the second pipeline inlet and outlet hole 706, the first cavity 702 of the fixing part, and the first inlet and outlet hole 701 of the fixing part.

[0057] Figure 8The internal structure of the heat storage box of the second embodiment of the present invention is shown. Figure 8 As shown, in the heat storage box 502, a spiral heat exchange tube 802 is arranged around the light channel 803. The heat-conducting fin 801 is a rectangular sheet body arranged on the light channel 803. The heat-conducting fin 801 extends from the light channel 803 to the inner wall direction of the heat storage box. The minimum angle between the straight line where the width direction of the heat-conducting fin 801 is located and the straight line parallel to the axis of the light channel 803 is an acute angle, that is, the heat-conducting fin 801 is inclined at a certain angle relative to the axis of the light channel 803, and the inclination direction is consistent with the spiral direction of the heat exchange tube 802. In other embodiments, the heat-conducting fin 801 can also be welded to the heat exchange tube 802 to play a role in reinforcing support. When the heat storage box rotates, the gravel therein begins to flow. The flowing gravel forms a flow trend from the lower part of the heat storage tank upward under the guidance of the spiral direction of the heat exchange tube 802 and the aforementioned inclined direction of the heat conduction fin 801, and then the gravel forms a circulating flow in the heat storage tank, thereby improving the efficiency of heat exchange.

[0058] The solar energy collection and storage device of the present invention has a simple structure and high reliability, and can be widely used in the field of solar energy utilization in harsh environments with strong winds and sand.

[0059] It is worth noting that the above description is only a preferred embodiment of the present invention, and does not limit the scope of patent protection of the present invention. The present invention can also be replaced by equivalent technologies. Therefore, any equivalent changes made by using the description and illustrations of the present invention, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A solar energy collection and storage device, comprising a first concave mirror, characterized in that: The invention also includes a second concave mirror whose mirror surface faces the mirror surface of the first concave mirror; the optical axis of the first concave mirror is coaxially arranged with the optical axis of the second concave mirror; the focus of the first concave mirror coincides with the focus of the second concave mirror; a light hole is arranged at the intersection of the optical axis of the first concave mirror and the first concave mirror; and a heat storage box is arranged on the back side of the first concave mirror, and a light entrance hole is arranged on the wall of the heat storage box, and the light entrance hole is arranged toward the light entrance hole; a columnar light channel is arranged in the heat storage box, the opening of the first end of the light channel is connected with the light entrance hole, the second end of the light channel is a closed bottom, and a reflector that can reflect light from the light entrance hole to the side wall of the light channel is arranged at the bottom of the light channel; the axis of the light channel coincides with the extension line of the optical axis of the second concave mirror; a heat exchange pipe for heat exchange medium to flow is arranged between the side wall of the light channel and the inner wall of the heat storage box.

2. A solar energy collection and storage device according to claim 1, characterized in that: A structure protruding toward the light entrance hole is arranged at the bottom of the light channel; and the reflector is arranged on the surface of the structure.

3. A solar energy collection and storage device according to claim 2, characterized in that: The structure includes a cone.

4. A solar energy collection and storage device according to claim 1, characterized in that: The material of the side wall of the optical channel includes a good thermal conductor material.

5. A solar energy collection and storage device according to claim 1, characterized in that: A heat absorbing coating is provided on the inner surface of the side wall of the light channel.

6. A solar energy collection and storage device according to claim 1, characterized in that: Heat-conducting fins are arranged on the outer side of the side wall of the light channel; the heat-conducting fins are extended toward the inner wall of the heat storage box.

7. A solar energy collection and storage device according to claim 1, characterized in that: The heat-conducting fin comprises a long sheet-shaped body, and the minimum angle between a straight line where the width direction of the heat-conducting fin is located and a straight line parallel to the axis of the light channel is an acute angle.

8. A solar energy collection and storage device according to claim 1, characterized in that: A heat storage body is arranged in the space between the light channel and the inner wall of the heat storage box.

9. A solar energy collection and storage device according to claim 1, characterized in that: A heat-insulating layer is arranged on the wall of the heat storage box.

10. A solar energy collection and storage device according to claim 1, characterized in that: An exhaust valve which can communicate the inner and outer spaces of the heat storage box is arranged on the wall of the heat storage box.

11. A solar energy collection and storage device according to claim 1, characterized in that: The first concave mirror is in the shape of a spherical cap, and a light-transmitting dust cover is arranged at the bottom of the spherical cap; the edge of the light-transmitting dust cover is sealed and connected to the edge of the first concave mirror.

12. A solar energy collection and storage device according to claim 11, characterized in that: A long strip-shaped descaling brush is arranged on the light-transmitting dust cover; one end of the descaling brush is connected to the rotating mechanism.

13. A solar energy collection and storage device according to claim 1, characterized in that: A metal mesh surrounding the light channel is fixedly arranged between the inner wall of the heat storage box and the light channel.

14. A solar energy collection and storage device according to claim 1, characterized in that: A heat dissipation device is arranged on the back side of the second concave mirror.

15. A solar energy collection and storage device according to claim 14, characterized in that: The heat dissipation device includes a shell that is buckled onto the back side of the second concave mirror, forming a cavity between the shell and the second concave mirror; a recess that is concave toward the shell is provided at the connection between the shell and the back side of the second concave mirror; a heat dissipation fan is provided on the shell; the air inlet of the heat dissipation fan is provided inside the shell, and the air outlet of the heat dissipation fan is provided outside the shell; or the air outlet of the heat dissipation fan is provided inside the shell, and the air inlet of the heat dissipation fan is provided outside the shell.

16. A solar energy collection and storage device according to claim 1, characterized in that: The heat exchange tube includes a spiral tube surrounding the light channel.

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