Directional light transmission solar energy concentrating light guide collector

Abstract

The present invention provides a directional light transmission solar energy concentrating light-guiding collector, in which sunlight can be totally reflected and directionally transmitted in a receiving tube, realizing concentrating and guiding light; at the same time, when the solar energy concentrating collector is used with an axial tilt, it can output heat energy and light energy in reverse, thereby realizing light-heat separation and expanding the solar energy utilization mode and field. The solar energy concentrating light-guiding collector comprises: a composite multi-curved surface concentrating collector and a receiving tube; the composite multi-curved surface concentrating collector is a trough structure; the receiving tube comprises: a coaxially docked light inlet tube and a light guide tube; the light guide tube is a tapered tube, the large end of which is docked with the light inlet tube; the small end of the light guide tube is a light outlet; the light inlet tube of the receiving tube is fixed in the composite multi-curved surface concentrating collector, and the light inlet channel on the light inlet tube coincides with the focal line of the composite multi-curved surface concentrating collector; the air channel inside the light inlet tube is connected to the hot air outlet arranged on the composite multi-curved surface concentrating collector; the light guide tube of the receiving tube extends out of the composite multi-curved surface concentrating collector.

Description

Technical Field

[0001] The invention relates to a solar energy concentrating light-guiding heat collector, in particular to a directional light transmission solar energy concentrating light-guiding heat collector, and belongs to the technical field of solar energy concentrating light-guiding and heat collection design. Background Art

[0002] The composite multi-curved concentrating collector currently used is to improve the energy concentration of incident solar radiation by concentrating light, but it also has the following disadvantages in practical applications:

[0003] (1) It only achieves the energy convergence of solar radiation, but cannot separate the light energy and heat energy in solar radiation for efficient utilization, and the utilization method is single;

[0004] (2) When concentrating sunlight, the energy obtained by the photothermal conversion of the receiver needs to be forced to circulate the heat exchange medium before it can be output. The system requires driving pump work, which consumes a lot of energy;

[0005] (3) When multiple concentrating solar collectors are connected in series, the receiver needs to be sealed and connected, which is difficult to construct and maintain later, and has poor sealing and thermal insulation performance. Summary of the invention

[0006] In view of this, the present invention provides a directional light transmission solar concentrating light guiding collector, in which the sunlight can be totally reflected and directionally transmitted in a receiving tube, thereby realizing concentrating and guiding light; at the same time, when the solar concentrating light collector is used in an axially tilted manner, it can output heat energy and light energy in reverse, thereby realizing light and heat separation and expanding the methods and fields of solar energy utilization.

[0007] The technical solution adopted by the present invention is: a directional light transmission solar energy concentrating collector, comprising: a composite multi-curved concentrating collector and a receiving tube;

[0008] The composite multi-curved surface concentrating collector is a trough structure;

[0009] The receiving tube comprises: a light inlet tube and a light guide tube coaxially connected; the end of the light inlet tube connected to the light guide tube is its front end; the inner diameter of the light inlet tube decreases from the back to the front; the body material of the light inlet tube is a light-dense medium relative to air, and the outer surface of the light inlet tube is coated with a reflective material except for the position of the light inlet path along the axial direction;

[0010] The light guide tube is a tapered tube, the large end of which is butted against the light inlet tube; the outer surface of the light guide tube is a light absorbing material, and the inner surface is a light reflecting material; the small end of the light guide tube is a light outlet;

[0011] The light inlet pipe of the receiving tube is fixed in the composite multi-curved surface concentrating collector, and the light inlet path on the light inlet pipe coincides with the focal line of the composite multi-curved surface concentrating collector; and the air channel inside the light inlet pipe is connected to the hot air outlet arranged on the composite multi-curved surface concentrating collector; the light guide tube of the receiving tube extends out of the composite multi-curved surface concentrating collector.

[0012] As a preferred embodiment of the present invention, the height of the receiving tube in the composite multi-curved concentrating solar collector ensures that the light reflected once by the composite multi-curved concentrating solar collector is in the same direction as the incident light.

[0013] As a preferred embodiment of the present invention, when the solar concentrating light-guiding collector is used for light guiding, the solar concentrating light-guiding collector is placed tilted along the axis so that the light outlet of the receiving tube is tilted toward the set light guiding position, and the direction and tilt angle of the solar concentrating light-guiding collector are adjusted so that the light incident angle is greater than the critical angle of the light-dense medium.

[0014] As a preferred embodiment of the present invention, a bracket for adjusting the posture of the composite multi-curved concentrating solar collector is provided at the bottom of the composite multi-curved solar concentrating solar collector.

[0015] As a preferred embodiment of the present invention, the bracket comprises: a base, a universal joint and a bottom plate;

[0016] The composite multi-curved concentrating collector is installed on the top of the universal joint through a base plate, and the universal joint is supported on a base. The posture of the composite multi-curved concentrating collector is adjusted by controlling the movement of the universal joint, specifically: the direction of the composite multi-curved concentrating collector is adjusted by rotation, and the angle between the axis of the composite multi-curved concentrating collector and the horizontal direction is adjusted by tilting.

[0017] As a preferred embodiment of the present invention, when two or more solar concentrating light-guiding thermal collectors are connected in series for concentrating heat collection, the light guide tube of the previous solar concentrating light-guiding thermal collector can be directly inserted into the air channel inside the light inlet tube of the next solar concentrating light-guiding thermal collector.

[0018] As a preferred embodiment of the present invention, the length of the light guide tube is greater than the length of the light inlet tube.

[0019] As a preferred embodiment of the present invention, the composite multi-curved concentrating collector comprises: two reflector assemblies, a transparent cover plate, a trough bottom parabolic reflector and a transparent side plate;

[0020] The two reflector assemblies are arranged symmetrically on the left and right, and each includes: a parabolic reflector for light reflection and a plane reflector connected to the lower end of the parabolic reflector for light reflection; the transparent cover plate is laid on the top of the two reflector assemblies; a transparent side plate is laid on each of the front and rear sides of the whole formed by the two reflector assemblies; and a groove-bottom parabolic reflector for light reflection is laid on the bottom of the two reflector assemblies.

[0021] As a preferred embodiment of the present invention, a supporting side panel for fixing and supporting the receiving tube is provided on the inner surface of the transparent side panel at the rear side of the composite multi-curved concentrating collector; the air outlet is an opening processed on the supporting side panel and the transparent side panel at the corresponding position.

[0022] As a preferred embodiment of the present invention, both front and rear ends of the transparent cover plate extend outward relative to the groove bottom parabolic reflector, so that the transparent side plate is in an inwardly inclined state after installation;

[0023] During transportation, two or more composite multi-curved surface concentrating thermal collectors are stacked together in the height direction so that the lower end of the upper composite multi-curved surface concentrating thermal collector is placed inside the lower composite multi-curved surface concentrating thermal collector.

[0024] Beneficial effects:

[0025] (1) The solar concentrating and light-guiding collector of the present invention can achieve forward focusing and directional light transmission. The sunlight is reflected by the composite multi-curved surface of the concentrating collector, and then enters the light inlet tube through the light inlet path that coincides with the focal line of the concentrating collector. Under the action of the reflective material on the inner surface of the light inlet tube, total reflection occurs, and directional transmission of light in the optical density medium is achieved, thereby realizing the focusing and light-guiding function, thereby expanding the utilization methods and fields of traditional solar concentrating collectors.

[0026] (2) The position of the receiving tube in the composite multi-curved concentrating collector makes the light reflected once by the composite multi-curved concentrating collector have the same direction as the incident light, thereby achieving "forward focusing" and improving the light guiding effect.

[0027] (3) When the solar concentrating light-guiding collector of the present invention is tilted to guide light, the light is totally reflected inside the receiving tube and transmitted to the light outlet, while the heat generated in the receiving tube in the process is discharged in reverse through the buoyancy of the "chimney effect" (that is, the hot air floats upward and is output from the hot air outlet of the concentrating collector), thereby realizing unpowered light-heat separation and realizing the separation and efficient utilization of light energy and heat energy in solar radiation; thus, the solar concentrating collector of the present invention can be used as an exhaust duct, which is beneficial to the fresh air exchange of the building.

[0028] (4) The light guide tube in the present invention is designed to be in the shape of a cone. When multiple concentrating light guide heat collectors are placed horizontally for heat collection, the receiving tube can be used as a connecting component between the concentrating light guide heat collectors. The light guide tube of the previous concentrating light guide heat collector can be coaxially embedded in the light inlet tube of the next concentrating light guide heat collector. At the same time, the air in the receiving tube realizes dual conversion and collection of thermal energy under the combined action of the transmitted light in the optically dense medium and the totally reflected light in the light guide tube, which significantly improves the heat collection efficiency. The light inlet tube and the light guide tube are embedded in each other for heat collection, which improves the thermal insulation effect during heat collection, simplifies the connection method of the concentrator, and effectively improves the utilization efficiency and application convenience of the concentrator.

[0029] (5) The present invention provides a bracket capable of supporting, rotating, and tilting the composite multi-curved concentrating collector. The orientation of the composite multi-curved concentrating collector can be adjusted by rotation, and the angle between the axis of the composite multi-curved concentrating collector and the horizontal direction can be adjusted by tilting. Thus, the posture of the composite multi-curved concentrating collector can be adjusted according to usage requirements.

[0030] (6) The axial dimension of the upper end of the composite multi-curved concentrating solar collector of the present invention is larger than that of the lower end, thereby reducing the size of the stacked solar collector in the height direction during transportation, saving placement height and facilitating transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic structural diagram of the directional light transmission solar energy concentrating light guiding collector of the present invention;

[0032] Figure 2 It is a schematic diagram of the structure of the receiving tube in the directional light transmission solar energy concentrating light guiding collector of the present invention;

[0033] Figure 3 It is a schematic diagram of the structure of the light inlet tube in the directional light transmission solar energy concentrating light guiding collector of the present invention;

[0034] Figure 4 It is a schematic diagram of the structure of the light guide tube in the directional light transmission solar energy concentrating light guide collector of the present invention;

[0035] Figure 5 It is a schematic diagram of light propagation in a receiving tube of a directional light transmission solar energy concentrating light guiding collector of the present invention;

[0036] Figure 6 It is a schematic diagram of light propagation of the directional light transmission solar energy concentrating light guiding collector of the present invention;

[0037] Figure 7 It is a schematic diagram of an example of using the directional light transmission solar energy concentrating light guiding collector of the present invention;

[0038] Figure 8 A schematic diagram of the series connection of two or more directional light-transmitting solar concentrating light-guiding collectors.

[0039] Among them: 10-composite multi-curved concentrating collector; 110-transparent cover plate; 120-parabolic reflector; 130-hot air outlet; 140-plane reflector; 150-trough bottom parabolic reflector; 160-transparent side plate; 170-support side plate;

[0040] 20-receiving tube; 210-light inlet tube; 2110-light inlet channel; 2120-external reflection layer; 2130-light dense medium; 2140-air channel; 220-light guide tube; 2210-light outlet; 2220-light absorbing material; 2230-internal reflection layer;

[0041] 30- bracket; 310- controller; 320- universal joint; 330- bottom plate. DETAILED DESCRIPTION

[0042] The present invention is further described in detail below with reference to the accompanying drawings and examples.

[0043] Embodiment 1:

[0044] Traditional solar concentrating collectors can only collect heat, but cannot separate light and heat (traditional solar concentrating collectors transmit light and heat in the same direction when in use), resulting in a single energy supply method, and in actual applications, the focusing and heat transfer directions are inconsistent, the receiving body is "overheated" during non-operating periods, and the connection method is complicated, making it difficult to meet the solar radiation energy supply needs in different seasons; this embodiment provides a forward focusing and directional light transmission solar concentrating light guiding collector, which can achieve total reflection and directional transmission of sunlight in the receiving tube, thereby realizing the light guiding function; and in this process, it can achieve light and heat separation and graded utilization.

[0045] like Figure 1 As shown, the directional light transmission solar energy concentrating light guiding collector comprises: a composite multi-curved surface concentrating collector 10 and a receiving tube 20.

[0046] The composite multi-curved concentrating collector 10 is a trough structure, comprising: two reflector assemblies, a transparent cover 110, a trough bottom parabolic reflector 150 and a transparent side panel 160; wherein the two reflector assemblies are arranged symmetrically on the left and right, and each comprises: a parabolic reflector 120 for light reflection and a plane reflector 140 connected to the lower end of the parabolic reflector 120 for light reflection; the transparent cover 110 is laid on the top of the two reflector assemblies; a transparent side panel 160 is laid on each of the front and rear sides of the whole formed by the two reflector assemblies; and the trough bottom parabolic reflector 150 for light reflection is laid on the bottom of the two reflector assemblies.

[0047] A supporting side panel 170 for fixing and supporting the receiving tube 20 is arranged inside the composite multi-curved concentrating collector 10; in this example, the supporting side panel 170 is vertically arranged on the inner surface of the transparent side panel 160 located at the rear side; the hot air outlet 130 is an opening processed on the supporting side panel 170 and the transparent side panel 160 at the corresponding position.

[0048] like Figure 2 , Figure 3 and Figure 5 As shown, the receiving tube 20 includes: a coaxially connected light inlet tube 210 and a light guide tube 220; for the convenience of description, the end of the light inlet tube 210 connected to the light guide tube 220 is its front end; wherein the outer circumferential surface of the light inlet tube 210 is a cylindrical surface with equal diameter, and the inner circumferential surface is a cylindrical surface that gradually decreases axially from back to front, that is, the outer diameter of the light inlet tube 210 at each position along the axial direction is the same, and the inner diameter decreases from back to front; the inner circumferential surface of the light inlet tube 210 is an axially gradually decreasing cylindrical surface, which is used to achieve directional light transmission. The material of the main body of the light inlet tube 210 is a light-dense medium 2130 (relative to air, that is, compared with air, the material of the main body of the light inlet tube 210 is a light-dense medium, and air is a light-sparse medium), such as glass, PC or acrylic, etc., and the shape transformation from the outer layer to the inner layer is achieved by relying on the light-dense medium. The outer surface of the light inlet pipe 210 is coated with a layer of reflective material to form an outer reflective layer 2120. The outer reflective layer 2120 does not completely cover the outer surface of the light inlet pipe 210, but reserves a light inlet path 2110 along the axial direction (that is, the outer reflective layer 2120 is an unclosed annular structure, and the light inlet pipe 210 body leaks out at the position of the light inlet path 2110); the internal channel of the light inlet pipe 210 is an air channel 2140.

[0049] like Figure 2 and Figure 4 As shown, the light guide 220 is a tapered tube (i.e., the light guide 220 is in the shape of a truncated cone), the large end of the light guide 220 is coaxially connected to the light inlet pipe 210, and the outer diameter of the large end of the light guide 220 is the same as the outer diameter of the light inlet pipe 210. The outer surface of the light guide 220 is a black light absorbing material 2220, and the inner surface is a reflective material to form an inner reflection layer 2230; the small end of the light guide 220 is a light outlet 2210. The inner circumferential surface of the light inlet pipe 210 is designed as an axially tapered cylindrical surface and the tapered light guide 220 is used to ensure directional light transmission, so that the light entering the receiving tube can only be transmitted along the direction from the light inlet pipe 210 to the light guide 220.

[0050] When the receiving tube 20 is installed, the light inlet tube 210 of the receiving tube 20 is fixed in the composite multi-curved concentrating heat collector 10 through the supporting side plate 170, and the light inlet path 2110 on the light inlet tube 210 is made to coincide with the focal line of the solar concentrating heat collector; and the air passage 2140 inside the light inlet tube 210 (i.e., the center hole of the light inlet tube 210) is connected to the hot air outlet 130. The trough bottom parabolic reflector 150 supports and protects the light inlet tube 210, and the light guide tube 220 extends out of the composite multi-curved concentrating heat collector 10 from the transparent side plate 160 located at the front side, and the light inlet port of the light guide tube 220 (i.e., the large end of the light guide tube 220) is rigidly connected to the light outlet port of the light inlet tube 210 (i.e., the front end of the light inlet tube 210).

[0051] The position of the receiving tube 20 in the composite multi-curved concentrating collector 10 should ensure that the light reflected once by the composite multi-curved concentrating collector 10 is in the same direction as the incident light, thereby achieving forward focusing ("forward focusing" means that the focused light and the incident light are in the same direction); Figure 6 As shown, the receiving tube 20 needs to be located below the connecting line between the parabolic reflector 120 and the plane reflector 140, that is, located in the area between the two plane reflectors 140. In order to ensure that the light reflected once by the composite multi-curved concentrating collector 10 is in the same direction as the incident light, the specific height of the receiving tube 20 is designed based on the curve equation of the actual parabolic reflector 120.

[0052] like Figure 6 As shown, the composite multi-curved concentrating collector 10 has, from top to bottom, a parabolic reflector 120, a plane reflector 140, and a trough bottom parabolic reflector 150; the parabolic reflector 120 is used to reflect the incident light through the transparent cover plate 110 to the light inlet 2110 located on the surface of the light inlet pipe 210, and the trough bottom parabolic reflector 150 supports and protects the light inlet pipe 20 and the sealing and insulation of the concentrating collector. The light inlet 2110 on the upper surface of the light inlet pipe 210 is located at the focal line position of the two parabolic reflectors; if light a and light b are two incident light rays, the incident light rays enter the interior of the light inlet pipe 210 through the light inlet 2110 after being reflected by the parabolic reflector 120 (such as Figure 6 In the figure, the two incident light rays and the light rays c and d reflected once by the parabolic reflector 120 are in the same direction, that is, forward focusing). The light rays entering the light inlet pipe 210 are fully reflected and directional propagated in the light inlet pipe under the joint action of the optically dense medium 2130 and the outer reflective layer 2120.

[0053] When the solar concentrating light-guiding collector is used for concentrating and collecting heat, the heat collection method is the same as that of the traditional solar concentrating collector.

[0054] When the solar energy concentrating light guide collector is used for light guide, Figure 5As shown, the solar concentrating collector is tilted along the axis so that the light outlet 2210 of the receiving tube 20 is tilted toward the light guiding position, and the orientation and tilt angle of the solar concentrating light guiding collector are adjusted so that the light incident angle is greater than the critical angle of the light-dense medium 2130; at this time, after the incident light passes through the composite multi-curved concentrating collector 10 and converges to the receiving tube 20, it enters the light-dense medium 2130 from the light-sparse medium air through the light inlet channel 2110 of the light inlet tube 210. Because the light incident angle is greater than the critical angle of the light-dense medium 2130, the incident sunlight will be totally reflected in the light-dense medium 2130 and transmitted to the light guiding tube 220. The light is again totally reflected and transmitted by the internal reflection layer 2230 of the light guiding tube 220, and finally transmitted out from the light outlet 2210 to achieve light guiding.

[0055] Embodiment 2:

[0056] On the basis of the above-mentioned embodiment 1, in order to facilitate the adjustment of the posture of the composite multi-curved concentrating collector 10, a bracket 30 is further provided. The bracket 30 is the base of the composite multi-curved concentrating collector 10, and is used to support, rotate, and tilt the composite multi-curved concentrating collector 10. The bracket 30 includes: a base, a controller 310, a universal joint 320, and a bottom plate 330 directly fixed to the composite multi-curved concentrating collector 10. The composite multi-curved concentrating collector 10 is installed on the top of the universal joint 320 through the bottom plate 330, and the universal joint 320 is supported on the base. The controller 310 controls the movement of the universal joint 320, and the posture of the composite multi-curved concentrating collector 10 can be adjusted, specifically: the direction of the composite multi-curved concentrating collector 10 is adjusted by rotation, and the angle between the axis of the composite multi-curved concentrating collector 10 and the horizontal direction is adjusted by tilting.

[0057] Embodiment 3:

[0058] Based on the above-mentioned embodiment 2, a specific use method of the solar concentrating light-guiding collector is given.

[0059] like Figure 7 As shown, when the solar concentrating light-guiding collector is used for guiding light in a solar greenhouse in summer, the bracket 30, under the action of the controller 310, makes the solar concentrating light-guiding collector in a tilted downward state, and the receiving tube 20 is tilted downward, and the light-guiding tube 220 is extended into the solar greenhouse, and the composite multi-curved concentrating collector 10 is located outside the solar greenhouse and faces south.

[0060] The sunlight enters the interior of the composite multi-curved concentrating collector 10 through the transparent cover plate 110 and the transparent side plate 160, and enters the interior of the light inlet tube 210 through the light inlet duct 2110 under the reflection of the parabolic reflector 120, and is totally reflected by the outer reflection layer 2120 and the inner reflection layer 2230 to propagate to the light outlet 2210, thereby achieving light guidance; at the same time, the heat inside the solar greenhouse can be exported to the outside through the receiving tube 20 and the hot air outlet 130 using the buoyancy of the "chimney effect", thereby achieving the fresh air and dehumidification effect of the solar greenhouse.

[0061] Embodiment 4:

[0062] On the basis of the above-mentioned embodiments 1-3, Figure 8 As shown, the length of the light guide 220 is slightly larger than the length of the light inlet pipe 210; when multiple solar concentrating light-guiding collectors are connected in series for concentrating heat collection, the light guide 220 of the previous solar concentrating light-guiding collector can be directly inserted into the inner air channel 2140 of the light inlet pipe 210 of the next solar concentrating light-guiding collector, thereby simplifying the connection method of the concentrating collectors.

[0063] At the same time, since the outer surface of the light guide tube 220 is the black light absorbing material 2220, the black light absorbing material 2220 can effectively absorb sunlight and heat the circulating medium flowing through the air channel 2140 when performing concentrated solar heat collection; and when performing concentrated solar heat collection, since the light inlet tube 210 and the light guide tube 220 are in a nested state, the light transmitted through the receiving tube 20 that is not used by the first concentrated solar collector can heat the air inside the second heating air channel 2140 again, thereby realizing efficient utilization of thermal energy.

[0064] Therefore, when this type of structural form of solar concentrating light-guiding collector is used in series, the light inlet tube and the light guide tube can be embedded in the heat collection, reducing the heat dissipation loss during heat collection, realizing the same direction of light transmission and heat transport, simplifying the connection method of the concentrator, and effectively improving the utilization efficiency of the concentrator.

[0065] Embodiment 5:

[0066] On the basis of the above-mentioned embodiments 1-4, in order to facilitate the transportation of the composite multi-curved concentrating collector 10 (the receiving tube 20 and the composite multi-curved concentrating collector 10 are transported separately), the axial dimension of the upper end of the composite multi-curved concentrating collector 10 is made larger than the axial dimension of the lower end, that is, the length of the transparent cover 110 is larger than the length of the trough bottom parabolic reflector 150. Specifically, the front and rear ends of the transparent cover 110 both have an outward extension relative to the trough bottom parabolic reflector 150, so that the transparent side panel 160 is in an inwardly inclined state after installation.

[0067] During transportation, the transparent cover 110 is not installed first (for a solar concentrating light-guiding collector with a bracket 30, the bracket 30 is also not installed first), and multiple composite multi-curved concentrating collectors 10 are stacked together in the height direction. Since the axial dimension of the upper end of the composite multi-curved concentrating collector 10 is larger than the axial dimension of the lower end, the lower end of the upper composite multi-curved concentrating collector 10 can be placed inside the lower composite multi-curved concentrating collector 10, which saves placement height and facilitates transportation.

[0068] The above contents are further detailed descriptions of the present invention in combination with specific implementation methods, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. Directional light transmission solar energy concentrating light guiding collector, characterized by: include: Composite multi-curved concentrating collector and receiving tube; The composite multi-curved surface concentrating collector is a trough structure; The receiving tube comprises: a light inlet tube and a light guide tube coaxially connected to each other; the end of the light inlet tube connected to the light guide tube is its front end; The inner diameter of the light inlet pipe decreases from the back to the front; the main body material of the light inlet pipe is a light-dense medium relative to air, and the outer surface thereof is coated with a reflective material except for the light inlet path along the axial direction; The light guide tube is a tapered tube, the large end of which is butted against the light inlet tube; the outer surface of the light guide tube is a light absorbing material, and the inner surface is a light reflecting material; the small end of the light guide tube is a light outlet; The light inlet pipe of the receiving tube is fixed in the composite multi-curved concentrating heat collector, and the light inlet path on the light inlet pipe coincides with the focal line of the composite multi-curved concentrating heat collector; and the air channel inside the light inlet pipe is connected to the hot air outlet arranged on the composite multi-curved concentrating heat collector; the light guide pipe of the receiving tube extends out of the composite multi-curved concentrating heat collector; When two or more solar concentrating light-guiding heat collectors are connected in series for concentrating heat collection, the light-guiding tube of the last solar concentrating light-guiding heat collector can be directly inserted into the air passage inside the light inlet tube of the next solar concentrating light-guiding heat collector.

2. The directional light transmission solar energy concentrating light guide collector according to claim 1, characterized in that: The height of the receiving tube in the composite multi-curved surface concentrating collector ensures that the light reflected once by the composite multi-curved surface concentrating collector is in the same direction as the incident light.

3. The directional light transmission solar energy concentrating light guiding collector according to claim 1, characterized in that: When the solar concentrating light-guiding collector is used for light guiding, the solar concentrating light-guiding collector is placed tilted along the axis so that the light outlet of the receiving tube is tilted toward the set light guiding position, and the direction and tilt angle of the solar concentrating light-guiding collector are adjusted so that the light incident angle is greater than the critical angle of the light-dense medium.

4. The directional light transmission solar energy concentrating light guiding collector according to claim 1, 2 or 3, characterized in that: A bracket for adjusting the posture of the composite multi-curved surface concentrating thermal collector is arranged at the bottom of the composite multi-curved surface concentrating thermal collector.

5. The directional light transmission solar energy concentrating light guiding collector according to claim 4, characterized in that: The bracket comprises: a base, a universal joint and a bottom plate; The composite multi-curved concentrating collector is installed on the top of the universal joint through a base plate, and the universal joint is supported on a base. The posture of the composite multi-curved concentrating collector is adjusted by controlling the movement of the universal joint, specifically: the direction of the composite multi-curved concentrating collector is adjusted by rotation, and the angle between the axis of the composite multi-curved concentrating collector and the horizontal direction is adjusted by tilting.

6. The directional light transmission solar energy concentrating light guiding collector according to claim 1, 2 or 3, characterized in that: The length of the light guide pipe is greater than the length of the light inlet pipe.

7. The directional light transmission solar energy concentrating light guiding collector according to claim 1, 2 or 3, characterized in that: The composite multi-curved surface concentrating heat collector comprises: two reflector assemblies, a transparent cover plate, a trough bottom parabolic reflector and a transparent side plate; The two reflector assemblies are arranged symmetrically on the left and right, and each includes: a parabolic reflector for light reflection and a plane reflector connected to the lower end of the parabolic reflector for light reflection; the transparent cover plate is laid on the top of the two reflector assemblies; a transparent side plate is laid on each of the front and rear sides of the whole formed by the two reflector assemblies; and a groove-bottom parabolic reflector for light reflection is laid on the bottom of the two reflector assemblies.

8. The directional light transmission solar energy concentrating light guiding collector according to claim 7, characterized in that: A supporting side plate for fixing and supporting the receiving tube is arranged on the inner surface of the transparent side plate at the rear side of the composite multi-curved concentrating collector; the air outlet is an opening processed on the supporting side plate and the transparent side plate at the corresponding position.

9. The directional light transmission solar energy concentrating light guide collector according to claim 7, characterized in that: Both the front and rear ends of the transparent cover plate extend outward relative to the parabolic reflector at the bottom of the groove, so that the transparent side plate is in an inwardly inclined state after installation; During transportation, two or more composite multi-curved surface concentrating thermal collectors are stacked together in the height direction so that the lower end of the upper composite multi-curved surface concentrating thermal collector is placed inside the lower composite multi-curved surface concentrating thermal collector.

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