Composite multi-surface concentrator with adjustable heat collection

Abstract

The present invention provides a composite multi-curved concentrator with adjustable heat collection, comprising a body and an air inlet assembly, wherein a receiving cavity is provided in the body, and an air inlet and an air outlet connected to the receiving cavity are provided on the body; the air inlet assembly comprises a fan assembly, wherein a light-transmitting tube connected to the fan assembly is provided in the receiving cavity, wherein a reflective ventilation tube with a plurality of magnetic suction heads attached to the surface is provided in the light-transmitting tube, wherein a plurality of photothermal conversion fins connected to the magnetic suction heads are provided on the outer peripheral wall of the reflective ventilation tube, wherein a reflective coating and a selective absorption coating arranged opposite to the reflective coating are provided on the light-thermal conversion fin; when the light-transmitting tube is in an air-intake state, one end of the photothermal conversion fin is blown away from the magnetic suction head, and rotates around one end of the magnetic suction head toward the inner wall surface of the light-transmitting tube, and the selective absorption coating faces the light-intake side away from the reflective ventilation tube; when the light-transmitting tube is in a non-air-intake state, the photothermal conversion fin is attached to the outer wall surface of the reflective ventilation tube, and the reflective coating faces the light-intake side of the receiving cavity. Thus, overheating damage is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of solar energy concentration and thermal design, and in particular to a composite multi-curved surface concentrator capable of adjusting the amount of collected heat. Background Art

[0002] The receivers of the composite multi-surface concentrators currently used are mostly made of glass vacuum tubes. Their advantage is that they can effectively reduce convective heat dissipation losses, but they also have the following disadvantages in practical applications: the vacuum interlayer cannot effectively absorb the incident sunlight, which can easily cause "gap optical losses"; the heat exchange medium is mostly liquid, which consumes large power during cyclic operation and has high requirements for pipeline sealing; when not in operation, the high temperature generated by the incident sunlight causes the receiver to "overheat", which can cause long-term damage to the receiver; when in operation, it is difficult to effectively adjust the amount of collected heat according to the operating conditions.

[0003] That is, the existing composite multi-curved surface concentrator has low operating efficiency, high investment cost, poor actual application effect, and is prone to overheating, which affects the service life of the concentrator. Summary of the invention

[0004] The embodiment of the present invention provides a composite multi-curved surface concentrator with adjustable heat collection amount, so as to solve the technical problem in the prior art that the heat of the concentrator cannot be adjusted, resulting in a short service life.

[0005] The embodiment of the present invention provides a composite multi-curved surface concentrator with adjustable heat collection amount, comprising:

[0006] A main body, wherein a containing cavity is provided therein, and an air inlet and an air outlet communicated with the containing cavity are provided on the main body;

[0007] An air inlet assembly, including a fan assembly, wherein a light-transmitting tube connected to the fan assembly is provided in the accommodating cavity, and two ends of the light-transmitting tube are connected to the air inlet and the air outlet;

[0008] A reflective ventilation pipe with a plurality of magnetic heads attached to the surface is arranged in the light-transmitting tube, a plurality of photothermal conversion fins connected to the magnetic heads are arranged on the outer peripheral wall of the reflective ventilation pipe, and a reflective coating and a selective absorption coating arranged opposite to the reflective coating are arranged on the photothermal conversion fins; wherein,

[0009] When the light-transmitting tube is in the air-inletting state, one end of the photothermal conversion fin is blown away from the magnetic suction head and rotates around the one end of the magnetic suction head toward the inner wall surface of the light-transmitting tube, and the selective absorption coating faces the light-inlet side away from the reflective ventilation tube; when the light-transmitting tube is in the non-air-inletting state, the photothermal conversion fin is attached to the outer wall surface of the reflective ventilation tube and the reflective coating faces the light-inlet side of the accommodating cavity.

[0010] According to a composite multi-curved concentrator with adjustable heat collection capacity in one embodiment of the present invention, a gas flow channel connected to the inner cavity of the light-transmitting tube is provided in the reflective ventilation tube, a continuous guide groove is provided on the surface of the reflective ventilation tube, and a plurality of the guide grooves are arranged in a spiral.

[0011] According to a composite multi-curved concentrator with adjustable heat collection capacity according to one embodiment of the present invention, a plurality of the photothermal conversion fins are arranged at intervals along the axial direction of the reflective ventilation pipe, and a line connecting the connection ends of the plurality of the photothermal conversion fins and the reflective ventilation pipe is spiral and is arranged in the same direction as the rotation direction of the guide groove.

[0012] According to a composite multi-curved concentrator with adjustable heat collection amount in one embodiment of the present invention, the body comprises a top frame and a light-transmitting cover plate connected to the top frame, and the light-transmitting cover plate is disposed on the accommodating cavity.

[0013] According to the composite multi-curved concentrator with adjustable heat collection amount in one embodiment of the present invention, the light-transmitting cover plate is a double-layer glass cover plate or a double-layer PC cover plate, and a heat preservation cavity is provided in the middle of the double-layer glass cover plate or the double-layer PC cover plate.

[0014] According to a composite multi-curved concentrator with adjustable heat collection amount according to one embodiment of the present invention, the two side walls of the accommodating cavity parallel to the axial direction of the light-transmitting tube include, in sequence, along the direction from one end close to the light-transmitting cover plate to the direction toward the light-transmitting tube: a first reflecting surface, a second reflecting surface connected to the first reflecting surface, and a third reflecting surface connected to the second reflecting surface, wherein the first reflecting surface, the second reflecting surface and the third reflecting surface are used to reflect the light passing through the light-transmitting cover plate toward the light-transmitting tube.

[0015] According to a composite multi-surface concentrator with adjustable heat collection capacity according to one embodiment of the present invention, the first reflecting surface and the third reflecting surface are both parabolic surfaces, the second reflecting surface is a plane, the second reflecting surface is arranged parallel to the axial direction of the reflective ventilation pipe, and the third reflecting surface is at least partially located below the light-transmitting pipe.

[0016] A composite multi-curved concentrator with adjustable heat collection according to an embodiment of the present invention,

[0017] The air inlet assembly also includes an air guide pipe connected to the fan assembly;

[0018] A connecting sleeve connected to the main body is provided on one side of the air guide pipe, and the connecting sleeve is connected to the air inlet or the air outlet.

[0019] According to a composite multi-curved concentrator with adjustable heat collection capacity according to an embodiment of the present invention, a plurality of the bodies are arranged in series or in parallel;

[0020] Each of the fan components is connected to at least one of the bodies.

[0021] According to a composite multi-curved concentrator with adjustable heat collection amount according to one embodiment of the present invention, both ends of the reflective ventilation tube are provided with clamping columns abutting against the inner wall of the transparent tube, and the clamping columns are used to make the central axis of the reflective ventilation tube colinear with the central axis of the transparent tube.

[0022] In the composite multi-curved concentrator with adjustable heat collection provided by the embodiment of the present invention, when the light-transmitting tube is in the air-inlet state, one end of the photothermal conversion fin is separated from the reflective ventilation tube, and the selective absorption coating is facing the light-inlet side of the light-transmitting tube, absorbing heat and transferring the heat to the inner cavity of the light-transmitting tube; when the light-transmitting tube is in the non-air-inlet state, one side of the selective absorption coating of the photothermal conversion fin is attached to the surface of the reflective ventilation tube, thereby avoiding overheating reaction on one side of the selective absorption coating of the photothermal conversion fin and reducing the service life of the photothermal conversion fin. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a partial structural schematic diagram of an angle of a composite multi-curved surface concentrator with adjustable heat collection according to an embodiment of the present invention;

[0025] Figure 2 It is a schematic structural diagram of an embodiment of a composite multi-curved surface concentrator with adjustable heat collection according to an embodiment of the present invention;

[0026] Figure 3 for Figure 1 A schematic structural diagram of another state of the composite multi-curved surface concentrator with adjustable heat collection amount shown;

[0027] Figure 4 for Figure 1 A schematic structural diagram of a state of the light-transmitting tube shown;

[0028] Figure 5 for Figure 1 A schematic structural diagram of a composite multi-curved concentrator with adjustable heat collection, showing a state in which light enters;

[0029] Figure 6 for Figure 1 A schematic structural diagram of another state of light entering the composite multi-curved concentrator with adjustable heat collection amount shown;

[0030] Figure 7 It is a schematic structural diagram of another embodiment of the composite multi-curved surface concentrator with adjustable heat collection according to an embodiment of the present invention;

[0031] 10. Main body; 110. Accommodating cavity; 1110. First reflecting surface; 1120. Second reflecting surface; 1130. Third reflecting surface; 120. Air inlet; 130. Air outlet; 140. Top frame; 150. Translucent cover plate;

[0032] 20. air inlet assembly; 210. fan assembly; 220. air guide duct; 230. connecting sleeve;

[0033] 30. Translucent tube; 310. Magnetic head; 3110. Gas flow channel; 3120. Guide groove; 3140. Card column; 320. Photothermal conversion fin; 3210. Reflective coating; 3220. Selective absorption coating; 330. Reflective ventilation tube. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limitations on the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0036] Combine the following Figures 1 to 7The embodiment of the present invention provides a composite multi-curved concentrator with adjustable heat collection, including a body 10 and an air inlet assembly 20. The body 10 is provided with a housing cavity 110, and the body 10 is provided with an air inlet 120 and an air outlet 130 connected to the housing cavity 110; the air inlet assembly 20 includes a fan assembly 210, and the housing cavity 110 is provided with a light-transmitting tube 30 connected to the fan assembly 210, and the two ends of the light-transmitting tube 30 are connected to the air inlet 120 and the air outlet 130; the light-transmitting tube 30 is provided with a reflective ventilation tube 330 with a plurality of magnetic suction heads 310 attached to the surface, and the outer peripheral wall of the reflective ventilation tube 330 is provided with a magnetic suction head 310 connected to the magnetic suction head 310. The photothermal conversion fin 320 is connected to the light-heat conversion fin 320, and a reflective coating 3210 and a selective absorption coating 3220 arranged opposite to the reflective coating 3210 are provided on the light-heat conversion fin 320; wherein, when the light-transmitting tube 30 is in the air-inletting state, one end of the photothermal conversion fin 320 is blown away from the magnetic suction head 310, and rotates around one end of the magnetic suction head 310 toward the inner wall surface of the light-transmitting tube 30, and the selective absorption coating 3220 is facing the light-inlet side away from the reflective ventilation tube 330; when the light-transmitting tube 30 is in the non-air-inletting state, the photothermal conversion fin 320 is attached to the outer wall surface of the reflective ventilation tube 330 and the reflective coating 3210 is facing the light-inlet side of the accommodating cavity 110.

[0037] Please refer to Figure 1 When the fan assembly 210 is in operation and allows flowing air to pass through the inner cavity of the light-transmitting tube 30, one end of the photothermal conversion fin 320 separates from the reflective ventilation tube 330 and rotates toward the inner wall surface of the light-transmitting tube 30, so that the air not only flows in the inner cavity of the light-transmitting tube 30 but also partially circulates in the reflective ventilation tube 330, so that the air can fully contact the photothermal conversion fin 320, thereby extending the heat exchange time between the air and the photothermal conversion fin 320, and the selective absorption coating 3220 provided on the photothermal conversion fin 320 absorbs the heat of the light and transfers it to the air flowing through, and the heated air is discharged to the external functional system through the air outlet 130. In this process, the accommodating chamber 110 is in a closed state, and a greenhouse effect is formed inside, which reduces the loss of heat dissipation and improves the heat output efficiency.

[0038] Please refer to Figures 2 to 4In a feasible embodiment of the present invention, a gas flow channel 3110 connected to the inner cavity of the light-transmitting tube 30 is provided inside the reflective ventilation tube 330, and a plurality of guide grooves 3120 connected to the gas flow channel 3110 are provided on the surface of the reflective ventilation tube 330, and the plurality of guide grooves 3120 are arranged in a spiral manner; a plurality of photothermal conversion fins 320 are arranged at intervals along the axial direction of the reflective ventilation tube 330, and the connecting lines between the plurality of photothermal conversion fins 320 and the connecting ends of the reflective ventilation tube 330 are spirally shaped and are arranged in the same direction as the rotation direction of the guide grooves 3120. It should be noted that the light-transmitting tube 30 is a single-layer light-transmitting tube, and the light-transmitting tube 30 is provided with an inner cavity for gas circulation, and the reflective ventilation tube 330 is provided in the inner cavity. The reflective ventilation tube 330 is provided with a gas flow channel 3110 connected to the inner cavity. When the fan assembly 210 flows gas into the light-transmitting tube 30 through the air inlet 120, a part of the flowing gas flows through the inner cavity toward the air outlet 130, and the other part passes through the gas flow channel 3110 and is guided to the inner cavity through the guide groove 3120. That is, when the gas flows in the inner cavity, because the guide groove 3120 is spiral, as the gas is transmitted through the gas flow channel 3110, it will blow the photothermal conversion fin 320 to rotate around one end of the magnetic suction head 310, so that one end of the photothermal conversion fin 320 is separated from the reflective ventilation tube 330 and rotates toward the inner wall of the light-transmitting tube 30. It can be understood that the reflective ventilation duct 330 is rotatably connected to the main body 10, so that when the reflective ventilation duct 330 rotates, the photothermal conversion fins 320 close to the air inlet 120 side will rotate, which will promote the end of the photothermal conversion fins 320 away from the air inlet 120 side to gradually separate from the magnetic suction head 310, and finally cause one end of all the photothermal conversion fins 320 to separate from the magnetic suction head 310 and rotate with the magnetic suction head 310. Specifically, for the rotational connection method between the reflective ventilation duct 330 and the main body 10, a socket connection or the like can be selected, which is not limited here.

[0039] In one embodiment of the present invention, the light-transmitting tube 30 is changed into a single-layer tube, which reduces the manufacturing cost of the light-transmitting tube 30 and can realize the switching between direct light-to-heat conversion and reflective self-protection against overheating, thereby ensuring the service life of the light-to-heat conversion receiver composed of the light-transmitting tube 30 and the reflective ventilation tube 330.

[0040] Please continue to refer to Figures 3 to 5In a feasible embodiment of the present invention, a magnetic attraction portion (not shown) is provided on the surface of the reflective ventilation pipe 330 near the photothermal conversion fin 320, so that the light-transmitting pipe 30 is in a non-air-inlet state, and the selectively absorbent coating 3220 on the photothermal conversion fin 320 is attached to the magnetic attraction portion. The provision of the magnetic attraction portion facilitates the photothermal conversion fin 320 to return to a state of being attached to the magnetic attraction head 310 in a non-air-inlet state, and in order to protect one side of the selectively absorbent coating 3220 from being damaged by overheating due to light exposure, one side of the selectively absorbent coating 3220 is attached to the surface of the reflective ventilation pipe 330. In other feasible embodiments, a limiting groove may also be provided on the surface of the reflective ventilation pipe 330, so that the selectively absorbent coating 3220 is restored to the limiting groove when not blown by the flowing gas. The limiting groove may be coated with a magnetic attraction material, so that the photothermal conversion fin 320 moves toward the limiting groove when not blown by the flowing gas.

[0041] For the main body 10, a top frame 140 and a light-transmitting cover plate 150 connected to the top frame 140 are provided on the top of the main body 10, and the light-transmitting cover plate 150 is covered on the accommodating cavity 110. In a feasible embodiment of the present invention, the light-transmitting cover plate 150 is a double-layer glass cover plate, and a heat-insulating cavity is provided in the middle of the double-layer glass cover plate. The light-transmitting cover plate 150 is used to seal the sealed cavity. After the light passes through the double-layer glass cover plate and irradiates the light-transmitting tube 30, the double-layer glass cover plate can reduce the exchange of heat in the accommodating cavity 110 with the outside world. In other feasible embodiments, the light-transmitting cover plate 150 can also be a double-layer PC cover plate, and a heat-insulating cavity is also provided between the double-layer PC cover plates, which is not limited here.

[0042] Please refer to Figures 5 to 7 The two side walls of the accommodating cavity 110 parallel to the axis direction of the light-transmitting tube 30 include: a first reflection surface 1110, a second reflection surface 1120 connected to the first reflection surface 1110, and a third reflection surface 1130 connected to the second reflection surface 1120 in sequence along the direction from one end close to the light-transmitting cover plate 150 to the light-transmitting tube 30. The first reflection surface 1110, the second reflection surface 1120, and the third reflection surface 1130 are used to reflect the light passing through the light-transmitting cover plate 150 toward the light-transmitting tube 30. That is, the accommodating cavity 110 can be symmetrically arranged on the two opposite side surfaces of the light-transmitting tube 30, and one side surface includes the first reflection surface 1110, the second reflection surface 1120, and the third reflection surface 1130 connected in sequence. In a feasible embodiment of the present invention, the first reflecting surface 1110 and the third reflecting surface 1130 are both parabolic surfaces, the second reflecting surface 1120 is a plane, the second reflecting surface 1120 is arranged parallel to the axial direction of the reflective ventilation tube 330, and the third reflecting surface 1130 is at least partially located below the transparent tube 30.

[0043] For example, refer to Figure 5In actual application, the accommodating cavity 110 can receive incident sunlight with a solar altitude angle ranging from 0 to 40 degrees, and can also be adjusted according to the season to increase the average heat collection of the composite multi-curved concentrator with adjustable heat.

[0044] When the light is irradiated to the first reflective surface 1110 through the transparent cover plate 150, because the first reflective surface 1110 is a parabolic surface, most of the light will be reflected in the direction toward the light-transmitting tube 30, and more light can be irradiated to the light-transmitting tube 30 after reflection. As for the light irradiated to the second reflective surface 1120, because the second reflective surface 1120 is a plane and is arranged parallel to the axis of the light-transmitting tube 30, the light can be directly reflected to the light-transmitting tube 30 or reflected to the light-transmitting tube 30 through the third reflective surface 1130. As for the light irradiated to the third reflective surface 1130, because the third reflective surface 1130 is close to the bottom of the light-transmitting tube 30 and is a parabolic surface, most of the light will pass through the bottom area of ​​the light-transmitting tube 30 in the direction of the top of the accommodating cavity 110 after reflection. For example, refer to Figure 5 When light a is irradiated to the third reflective surface 1130, it will be reflected to the light-transmitting tube 30. Light b and light c are two end points of the first reflective surface 1110. Both light b and light c can be reflected to the light-transmitting tube 30. Most of the light in the area between light b and light c can also reach the light-transmitting tube 30 after being reflected. Figure 6 Similarly, when the photothermal conversion fin 320 is attached to the light-transmitting tube 30, except for some light rays that are directly directed to the reflective ventilation tube 330, other light rays will not pass through the reflective ventilation tube 330, thereby avoiding overheating reaction on the outer surface of the reflective ventilation tube 330. Moreover, at this time, the selective coating side of the photothermal conversion fin 320 provided on the magnetic suction head 310 is attached to the surface of the reflective ventilation tube 330, and the reflective coating 3210 is provided on the side away from the outer surface of the reflective ventilation tube 330, thereby also reflecting some light rays, avoiding overheating and damage to the photothermal conversion fin 320.

[0045] The air inlet assembly 20 also includes an air duct 220 connected to the fan assembly 210. A connecting sleeve 230 connected to the body 10 is provided on one side of the air duct 220. The connecting sleeve 230 is connected to the air inlet 120 or the air outlet 130. In a feasible embodiment of the present invention, the connecting sleeve 230 is used to connect the air duct 220 and the light-transmitting tube 30. Both ends of the light-transmitting tube 30 can extend to the air inlet 120 and the air outlet 130, and then the connecting sleeve 230 can be directly bonded to the outer wall of the body 10 near the air inlet 120, and the other side of the connecting sleeve 230 is connected to the air duct 220.

[0046] For the reflective ventilation tube 330, a clamping column 3140 is respectively arranged at both ends of the reflective ventilation tube 330, and the length of the clamping column 3140 is consistent with the diameter of the inner cavity of the light-transmitting tube 30, so that the two ends of the clamping column 3140 can abut the side wall of the inner diameter of the light-transmitting tube 30, and the connecting end of the reflective ventilation tube 330 and the clamping column 3140 is located in the middle of the clamping column 3140, so that when the clamping column 3140 abuts the side wall of the light-transmitting tube 30, the reflective ventilation tube 330 can be located at the center of the inner cavity of the light-transmitting tube 30. The two clamping columns 3140 are respectively arranged near the air inlet 120 and the air outlet 130, thereby preventing the magnetic suction head 310 from moving back and forth inside the light-transmitting tube 30.

[0047] Please refer to Figure 1 , Figure 2 and Figure 7 In a feasible embodiment of the present invention, a plurality of bodies 10 may be arranged in series or in parallel, and each fan assembly 210 may be connected to at least one body 10. For example, please refer to Figure 2 , two bodies 10 can be arranged in series, and the two bodies 10 are connected by the air guide 220. That is, a fan assembly 210 can be used to connect one body 10, but both bodies 10 can be in the air intake state at the same time. Alternatively, two bodies 10 can be arranged in parallel, for example, Figure 7 , one fan assembly 210 can be used to simultaneously fill two parallel-connected bodies 10 with flowing air.

[0048] In summary, in the composite multi-curved concentrator with adjustable heat collection provided by the embodiment of the present invention, when the light-transmitting tube 30 is in the air-inlet state, one end of the photothermal conversion fin 320 is separated from the reflective ventilation tube 330, and the selective absorption coating 3220 is facing the light-inlet side of the light-transmitting tube 30, absorbing heat and transferring the heat to the inner cavity of the light-transmitting tube 30, and when the light-transmitting tube 30 is in the non-air-inlet state, one side of the selective absorption coating of the photothermal conversion fin 320 is attached to the surface of the reflective ventilation tube 330, thereby avoiding overheating reaction on one side of the selective absorption coating of the photothermal conversion fin 320 and reducing the service life of the photothermal conversion fin 320.

[0049] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0050] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A composite multi-curved concentrator with adjustable heat collection, characterized in that: include: A main body, wherein a containing cavity is provided therein, and an air inlet and an air outlet communicated with the containing cavity are provided on the main body; An air inlet assembly, including a fan assembly, wherein a light-transmitting tube connected to the fan assembly is provided in the accommodating cavity, and two ends of the light-transmitting tube are connected to the air inlet and the air outlet; A reflective ventilation pipe with a plurality of magnetic heads attached to the surface is arranged in the light-transmitting tube, a plurality of photothermal conversion fins connected to the magnetic heads are arranged on the outer peripheral wall of the reflective ventilation pipe, and a reflective coating and a selective absorption coating arranged opposite to the reflective coating are arranged on the photothermal conversion fins; wherein, When the light-transmitting tube is in the air-intake state, one end of the photothermal conversion fin is blown away from the magnetic suction head and rotates around one end of the magnetic suction head toward the inner wall surface of the light-transmitting tube, and the selective absorption coating faces the light-intake side away from the reflective ventilation tube; when the light-transmitting tube is in the non-air-intake state, the photothermal conversion fin is attached to the outer wall surface of the reflective ventilation tube and the reflective coating faces the light-intake side of the accommodating cavity; The reflective ventilation pipe is provided with a gas flow channel connected to the inner cavity of the light-transmitting pipe, and the surface of the reflective ventilation pipe is provided with a continuous guide groove, and a plurality of the guide grooves are arranged in a spiral manner; The body comprises a top frame and a light-transmitting cover plate connected to the top frame, and the light-transmitting cover plate is arranged to cover the accommodating cavity.

2. The composite multi-curved concentrator with adjustable heat collection amount according to claim 1, characterized in that: The plurality of photothermal conversion fins are arranged at intervals along the axial direction of the reflective ventilation pipe, and the connection lines between the plurality of photothermal conversion fins and the connecting ends of the reflective ventilation pipe are spiral and are arranged in the same direction as the rotation direction of the guide groove.

3. The composite multi-curved concentrator with adjustable heat collection amount according to claim 1, characterized in that: The light-transmitting cover plate is a double-layer glass cover plate or a double-layer PC cover plate, and a heat-insulating cavity is provided in the middle of the double-layer glass cover plate or the double-layer PC cover plate.

4. The composite multi-curved concentrator with adjustable heat collection amount according to claim 1, characterized in that: The two side walls of the accommodating cavity parallel to the axial direction of the light-transmitting tube include, in sequence, along the direction from close to one end of the light-transmitting cover plate to the direction toward the light-transmitting tube: a first reflecting surface, a second reflecting surface connected to the first reflecting surface, and a third reflecting surface connected to the second reflecting surface. The first reflecting surface, the second reflecting surface, and the third reflecting surface are used to reflect the light passing through the light-transmitting cover plate toward the light-transmitting tube.

5. The composite multi-curved concentrator with adjustable heat collection amount according to claim 4, characterized in that: The first reflecting surface and the third reflecting surface are both parabolic surfaces, the second reflecting surface is a plane, the second reflecting surface is arranged parallel to the axial direction of the reflective ventilation pipe, and the third reflecting surface is at least partially located below the light-transmitting pipe.

6. The composite multi-curved concentrator with adjustable heat collection amount according to claim 1, characterized in that: The air inlet assembly also includes an air guide pipe connected to the fan assembly; A connecting sleeve connected to the main body is provided on one side of the air guide pipe, and the connecting sleeve is connected to the air inlet or the air outlet.

7. The composite multi-curved concentrator with adjustable heat collection amount according to claim 6, characterized in that: A plurality of the bodies are arranged in series or in parallel; Each of the fan components is connected to at least one of the bodies.

8. The composite multi-curved concentrator with adjustable heat collection amount according to claim 1, characterized in that: Both ends of the reflective ventilation tube are provided with clamping columns abutting against the inner side wall of the light-transmitting tube, and the clamping columns are used to make the central axis of the reflective ventilation tube and the central axis of the light-transmitting tube collinear.

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