Light tracking and concentrating heating device

Abstract

This application discloses a light-tracking and focusing heating device, relating to the technical field of focusing heating devices. The device includes: a reflector for reflecting light and forming a focused light spot; a collector for holding the material to be heated, wherein the focusing light plate of the reflector projects onto the outer wall of the collector to heat the collector; and a rotatable rotating assembly, to which both the reflector and the collector are connected, enabling the rotating assembly to drive the reflector and the collector to rotate synchronously.

Description

Technical Field

[0001] This application relates to the field of concentrating heating devices, and in particular to a light-tracking concentrating heating device. Background Technology

[0002] In the field of solar energy utilization, photothermal conversion technology has attracted much attention because it directly converts solar radiation energy into heat energy and has a wide range of applications, such as heating water or purifying water through evaporation and condensation. Traditional solar thermal devices typically use a fixed concentrator structure, which concentrates sunlight onto the surface of the collector through a reflector, and then converts the energy through heat conduction or convection.

[0003] In existing technologies, reflectors and solar collectors are mostly fixed installations, capable of receiving sunlight only during specific time periods. As the solar altitude angle and azimuth angle change dynamically over time, the incident angle of reflected light from fixed devices gradually deviates from the optimal angle, easily leading to problems such as reflected light spot shift and uneven light intensity distribution on the collector surface. Utility Model Content

[0004] The main purpose of this application is to provide a light-tracking and concentrating heating device, which aims to solve the technical problems in the prior art where the incident angle of reflected light from a fixed device gradually deviates from the optimal angle due to the dynamic changes of the solar altitude angle and azimuth angle over time, easily leading to reflected light spot shift and uneven light intensity distribution on the surface of the collector.

[0005] To achieve the above objectives, this application provides a light-tracking and focusing heating device, comprising: A reflector, used to reflect light and capable of forming a focused light spot; A solar collector for holding the material to be heated, wherein the focusing plate of the reflector projects light onto the outer wall of the solar collector to heat the solar collector; It also includes a rotatable rotating component, to which both the reflector and the collector are connected, so that the reflector and the collector can be driven to rotate synchronously through the rotating component.

[0006] Optionally, the rotating assembly includes a positioning element, a rotating shaft, and a support frame; The positioning element has a positioning hole, a portion of the rotating shaft is located within the positioning hole, and the rotating shaft is capable of rotating about the axis of the positioning hole; The rotating shaft is connected to the reflector, and the solar collector is connected to the rotating shaft via the support frame.

[0007] Optionally, the rotating assembly further includes a fixing frame for supporting the reflector, and the fixing frame is connected to the rotating shaft.

[0008] Optionally, a first gear is sleeved on the positioning member, a mounting plate is connected to the rotating shaft, a drive motor is provided on the mounting plate, a second gear is sleeved on the output shaft of the drive motor, the second gear meshes with the first gear, and the drive motor drives the rotating shaft to rotate around the positioning hole of the positioning member.

[0009] Optionally, the mounting plate is further provided with a counterweight, which is located on both sides of the rotating shaft, along with the drive motor.

[0010] Optionally, the support frame includes a first connecting rod, a second connecting rod, a first support rod, and a second support rod; The first end of the first support rod is connected to the rotating shaft, one end of the first connecting rod is connected to the second end of the first support rod, and the other end of the first connecting rod is connected to the solar collector. The first end of the second support rod is connected to the rotating shaft, one end of the second connecting rod is connected to the second end of the first support rod, and the other end of the second connecting rod is connected to the solar collector.

[0011] Optionally, the support frame further includes a support ring and a tie rod, the support ring having a mounting surface for mounting the solar collector; The first support rod is a telescopic component. The first end of the first support rod is hinged to the rotating shaft, the second end of the first support rod is hinged to one end of the first connecting rod, the other end of the first connecting rod is hinged to the support ring, and one end of the pull rod is hinged to the rotating shaft and the other end is hinged to the middle of the first connecting rod. One end of the second connecting rod is hinged to the support ring, and the other end of the second connecting rod is hinged to the support ring; The angle between the mounting surface of the support ring and the horizontal plane can be adjusted by driving the first support rod.

[0012] Optionally, the positioning element includes a positioning post, the positioning hole is disposed at the upper end of the positioning post, and a plurality of support legs are provided at the lower end of the positioning post.

[0013] Optionally, the solar collector is located above the reflector, which has a through clearance hole for the support frame to pass through.

[0014] Optionally, the collector has a receiving cavity for accommodating the material to be heated, and the inner wall of the receiving cavity is provided with heat-conducting fins.

[0015] The beneficial effects that this application can achieve are: The solar-focusing heating device proposed in this application uses a reflector to reflect sunlight and form a focused light spot. The focused light spot is projected onto the outer wall of the solar collector, thereby heating the solar collector. By driving the reflector to rotate synchronously with the solar collector through a rotating component, the relative angle of the reflector can be adjusted in real time to track changes in the solar azimuth and altitude angles, ensuring that the reflected light spot is always accurately projected onto the outer wall of the solar collector, thus improving the heat collection effect of the solar collector. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the light-tracking and focusing heating device according to an embodiment of this application; Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure shown. Figure 3 This is a three-dimensional structural diagram of the support frame according to an embodiment of this application; Figure 4 for Figure 1 A schematic diagram of the right-side view structure; Figure 5 This is a first-view perspective three-dimensional structural diagram of the light-tracking and focusing heating device according to an embodiment of this application. Figure 6 This is a second-view perspective three-dimensional structural diagram of the light-tracking and focusing heating device according to an embodiment of this application.

[0017] The numbers on the map are: 10-Reflector, 11-Allowing hole, 20-Collector, 21-Accommodation cavity, 22-Heat-conducting fins, 30-Positioning component, 31-Support leg, 32-Positioning post, 33-Positioning hole, 40-Rotating shaft, 50-Fixing frame, 60-Support frame, 61-First support rod, 62-Second support rod, 63-Pull rod, 64-Second connecting rod, 65-First connecting rod, 66-Support ring, 70-First gear, 71-Mounting plate, 72-Drive motor, 73-Second gear, 74-Counterweight.

[0018] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0021] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0022] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0023] Example 1 Reference Figures 1-6 The first embodiment of this application provides a light-tracking and light-concentrating heating device, including: a reflector 10, which is used to reflect light and can form a focused light spot; The collector 20 is used to hold the material to be heated. The focusing plate of the reflector 10 projects light onto the outer wall of the collector 20 to heat the collector 20. It also includes a rotatable rotating component, to which both the reflector 10 and the collector 20 are connected, so that the reflector 10 and the collector 20 can be driven to rotate synchronously through the rotating component.

[0024] In this embodiment, the upper surface of the reflector 10 is a reflective surface, which can be set as a paraboloid of revolution or a composite paraboloid to ensure that the incident light rays converge to a single focal point (or focal line) after reflection, forming a high-density focused light spot. The reflector 10 can be a single integral structure or it can be spliced ​​together from multiple small curvature units. Each unit can be independently adjusted in angle (error ≤ 0.1°), and the splicing error is compensated by an algorithm to ensure overall focusing accuracy. A high-reflectivity coating is applied to the upper surface of the reflector 10. The substrate of the reflector 10 can be a lightweight aluminum alloy (such as 6061-T6) or carbon fiber composite material, with a silver or silica antireflective coating on the surface. The collector 20 can actually be a container, and the material to be heated can be water. The upper end of the solar collector 20 can be equipped with an openable and closable end cap, through which water to be heated can be injected into the solar collector 20. Alternatively, a water inlet pipe can be installed on the solar collector 20 to inject water to be heated into the solar collector 20. A water outlet pipe can also be installed on the solar collector 20, through which the heated water can be discharged. A steam pipe can also be installed on the solar collector 20, through which the steam generated by the heating inside the solar collector 20 can be transported to the condenser for condensation to obtain purified water. At this time, the purified water can be transported to the destination for use by people or livestock according to actual needs.

[0025] The reflector 10 is tilted and mounted on the rotating assembly. Both the reflector 10 and the collector 20 are mounted on the rotating assembly. The rotating assembly drives the reflector 10 and the collector 20 to move synchronously. When the collector 20 is mounted on the reflector 10, through experience and multiple trials, the light spot reflected by the reflector 10 is projected onto the bottom outer wall or side wall of the collector 20. During the rotation of the rotating assembly, the reflector 10 and the collector 20 do not rotate separately, and there is no relative movement between them. This eliminates the need to adjust the position of the collector 20 each time, reducing manual labor intensity. As the reflector 10 is driven to rotate by the rotating assembly, the relative angle of the reflector 10 can be adjusted in real time to track changes in the solar azimuth and altitude angles over time, maintaining the angle of sunlight incidence within a suitable range to improve the heat collection efficiency of the collector 20.

[0026] The light-tracking and concentrating heating device of this application embodiment refers to "concentrating light" by reflecting light through the reflector 10 to form a concentrated light spot, "heating" by heating the collector 20 through the concentrating light plate, and "light tracking" by adjusting the relative position of the reflector 10 and the collector 20 through a rotating assembly to adapt to changes in the solar azimuth and altitude angles over different time periods, thereby achieving the effect of "light tracking". It should be noted that the light tracking can be targeted at only a certain time period or multiple preset time periods, without requiring all-day sunlight; of course, it can also perform all-day light tracking.

[0027] The device's geographical location (longitude and latitude) and time information are obtained through a GPS module. Combined with a solar position algorithm (such as the SPA algorithm), the theoretical solar azimuth and altitude angles are calculated as a tracking reference. A four-quadrant photodetector or CCD camera is installed on the outer wall of the solar collector 20 to monitor the deviation of the light spot center position in real time (accuracy ±0.5mm). The theoretical values ​​are corrected using a PID algorithm to compensate for mechanical errors and environmental interference (such as uneven ground). In clear weather: a high-speed tracking mode (azimuth and rotation speed 2-5 rpm) is used to quickly respond to solar motion (angular velocity 0.25° / min). In cloudy weather: a low-speed cruise mode is switched (azimuth and rotation speed 0.5-1 rpm) to reduce energy consumption and wear caused by frequent motor start-stop. Combining historical weather data and a solar trajectory model, the reflector angle is pre-adjusted by 10° 10 minutes in advance to shorten the tracking delay (delay time ≤0.3s).

[0028] Example 2 As an optional implementation, this embodiment provides a specific structure of a rotating assembly, including: the rotating assembly includes a positioning member 30, a rotating shaft 40 and a support frame 60; the positioning member 30 has a positioning hole 33, a portion of the rotating shaft 40 is located in the positioning hole 33, and the rotating shaft 40 is capable of rotating around the axis of the positioning hole 33; the rotating shaft 40 is connected to the reflector plate 10, and the solar collector 20 is connected to the rotating shaft 40 through the support frame 60.

[0029] Specifically, the positioning component 30 provides support for the entire solar radiation focusing heating device. The positioning component 30 can be positioned as needed by means of placement, screw fixing, or other methods. The upper end of the positioning component 30 has a positioning hole 33, and the lower end of the rotating shaft 40 is located within the positioning hole 33, allowing the rotating shaft 40 to rotate within it. Optionally, a bearing seat can be provided inside the positioning hole 33 or outside the positioning component 30, with a bearing installed inside. The bearing hole is coaxial with the positioning hole 33, and a portion of the rotating shaft 40 is mounted within the bearing, improving the stability of the rotating shaft 40 during rotation. The lower end of the support frame 60 is connected to the rotating shaft 40, and the upper end of the support frame 60 is connected to the solar collector 20.

[0030] Optionally, the rotating assembly also includes a mounting bracket 50 for supporting the reflector 10, and the mounting bracket 50 is connected to the rotating shaft 40.

[0031] Specifically, the fixing frame 50 includes multiple horizontally and vertically intersecting fixing beams. The fixing beams are connected to the lower end of the reflector 10, and the shape of the fixing beams matches the lower arc surface of the reflector 10. The fixing beams increase the support area for the lower end of the reflector 10, thereby improving the support stability of the reflector 10. The fixing frame 50 can be connected to the reflector 10 by means of bonding, welding, bolting, etc.

[0032] Optionally, a first gear 70 is fitted on the positioning component 30, and a mounting plate 71 is connected to the rotating shaft 40. A drive motor 72 is installed on the mounting plate 71, and a second gear 73 is fitted on the output shaft of the drive motor 72. The second gear 73 meshes with the first gear 70, and the drive motor 72 drives the rotating shaft 40 to rotate around the positioning hole 33 of the positioning component 30.

[0033] Specifically, the first gear 70 is sleeved on the positioning member 30. The portion of the positioning member 30 where the first gear 70 is sleeved is cylindrical. The first gear 70 is fixedly mounted on the positioning member 30, meaning it will not rotate relative to the positioning member 30. A mounting plate 71 is provided on the rotating shaft 40, and the mounting plate 71 is fixedly connected to the rotating shaft 40, preventing relative movement between them. The mounting plate 71 supports the drive motor 72, allowing the output shaft of the drive motor 72 to be located outside the first gear 70. The second gear 73 is mounted on the output shaft of the drive motor 72, parallel to the first gear 70, and located around the periphery of the first gear 70. The second gear 73 meshes with the first gear 70. When the drive motor 72 operates, the second gear 73 moves circumferentially around the periphery of the first gear 70. That is, the first gear 70 remains stationary while the second gear 73 moves circumferentially around the first gear 70, thereby driving the rotating shaft 40 to rotate circumferentially via the mounting plate 71. The drive motor 72 can be equipped with a photoelectric encoder, etc., and the start, stop, speed, etc. of the drive motor 72 can be logically controlled according to actual usage requirements.

[0034] Optionally, a counterweight 74 is also provided on the mounting plate 71, with the counterweight 74 and the drive motor 72 located on opposite sides of the rotating shaft 40. The counterweight 74 can also be a battery, which provides power to the drive motor while also serving as a counterweight.

[0035] Specifically, by setting a counterweight 74 on the mounting plate 71, the weight of the counterweight 74 is equivalent to the weight of the drive motor 72, so as to ensure that the weight on both ends of the mounting plate 71 is roughly the same, thereby avoiding the situation where the weight of the shaft is uneven on one side, resulting in greater friction on one side during the rotation of the shaft, which affects the rotational stability.

[0036] Example 3 As an optional implementation, this embodiment provides a specific structure of a support frame 60, including: the support frame 60 includes a first connecting rod 65, a second connecting rod 64, a first support rod 61, and a second support rod 62; the first end of the first support rod 61 is connected to the rotating shaft 40, one end of the first connecting rod 65 is connected to the second end of the first support rod 61, and the other end of the first connecting rod 65 is connected to the solar collector 20; the first end of the second support rod 62 is connected to the rotating shaft 40, one end of the second connecting rod 64 is connected to the second end of the first support rod 61, and the other end of the second connecting rod 64 is connected to the solar collector 20.

[0037] Specifically, refer to Figure 2 and Figure 3 As shown, the first support rod 61 and the second support rod 62 are located on both sides of the rotating shaft 40, and both the first support rod 61 and the second support rod 62 are inclined upwards. The lower end of the second support rod 62 is fixed to the rotating shaft 40. Compared with directly connecting the lower ends of the first connecting rod 65 and the second connecting rod 64 to the rotating shaft 40, by setting the first support rod 61 and the second support rod 62, the connection position of the lower ends of the first connecting rod 65 and the second connecting rod 64 is offset to the periphery of the rotating shaft 40, thereby improving the stability of the mounting bracket supporting the solar collector 20.

[0038] Optionally, the support frame 60 further includes a support ring 66 and a tie rod 63. The support ring 66 has a mounting surface for mounting the solar collector 20. The first support rod 61 is a telescopic member. The first end of the first support rod 61 is hinged to the rotation shaft 40, and the second end of the first support rod 61 is hinged to one end of the first connecting rod 65. The other end of the first connecting rod 65 is hinged to the support ring 66. One end of the tie rod 63 is hinged to the rotation shaft 40, and the other end is hinged to the middle of the first connecting rod 65. One end of the second connecting rod 64 is hinged to the support ring 66, and the other end of the second connecting rod 64 is hinged to the support ring 66. The angle between the mounting surface of the support ring 66 and the horizontal plane can be adjusted by driving the first support rod 61.

[0039] Specifically, the first end of both the first support rod 61 and the second support rod 62 is connected to the rotating shaft 40, and the second end of both the first support rod 61 and the second support rod 62 is the end furthest from the first end. The first support rod 61 is a telescopic component, which can be one of a hydraulic cylinder, a pneumatic cylinder, or an electric push rod. The two ends of the first support rod 61 are hinged to the first connecting rod 65 and the rotating shaft 40, respectively. The support ring 66 is used to support the solar collector 20. The support ring 66 can be a ring structure to ensure support stability while preventing the support ring 66 from blocking the light-gathering plate from projecting onto the lower outer wall of the solar collector 20. The support ring 66 and the solar collector 20 can be connected by means of bonding, welding, riveting, bolting, etc. The upper end of the second connecting rod 64 is hinged to the support ring 66, and the lower end of the second connecting rod 64 is connected to the second end of the second support rod 62. The first connecting rod 65 can be Y-shaped, with the upper end of the Y-shape connected to the support ring 66 and the lower end of the Y-shape connected to the first support rod 61. By setting a pull rod 63, the stability of the first connecting rod 65 is improved. The two ends of the pull rod 63 are hinged to the first connecting rod 65 and the rotating shaft 40, respectively. It should be noted that the aforementioned hinge typically includes a hinge axis, through which the two hinged components can rotate relative to each other around the hinge axis. When the first support rod 61 extends, ... Figure 2 For reference, the left end of the support ring 66 is tilted upwards and to the right. At this time, the right end of the support ring 66 will also move slightly to the right. During this adjustment, each hinged part undergoes adaptive adjustment around the hinge axis. It should be noted that the hinges are damped connections; that is, when rotating around the hinge axis at the hinge, a certain amount of damping needs to be overcome to ensure that the hinges do not rotate arbitrarily when the first support rod 61 does not extend or shorten. Similarly, when the first support rod 61 shortens... Figure 2 For reference, the left end of the support ring 66 is tilted downwards and to the left. At this time, the right end of the support will also move slightly downwards and to the left instead of remaining fixed. This allows the tilt angle of the upper surface of the support ring 66 to be adjusted via the first support rod 61 according to actual usage requirements, thereby adjusting the tilt angle of the lower surface of the collector 20. This enables the focused light spot to be projected directly onto the bottom wall of the collector 20 when the reflector plate of the reflector plate 10 drifts, by finely adjusting the tilt angle of the lower outer wall of the collector 20.

[0040] Optionally, the positioning element 30 includes a positioning post 32, a positioning hole 33 is disposed at the upper end of the positioning post 32, and a plurality of support legs 31 are provided at the lower end of the positioning post 32.

[0041] Specifically, by setting multiple support legs 31, the support coverage area of ​​the positioning member 30 is increased, thereby improving support stability. Each support leg 31 can also be equipped with a universal wheel with a locking function to facilitate the overall movement of the light-tracking and focusing heating device of the embodiment. The locking structure is used to lock the universal wheel to ensure that it does not move arbitrarily.

[0042] Optionally, the collector 20 is located above the reflector 10, which has a through clearance hole 11 for the support frame 60 to pass through.

[0043] Specifically, the clearance hole 11 is provided to facilitate the installation of the first connecting rod 65, the second connecting rod 64, the pull rod 63, and the second support rod 62.

[0044] Optionally, the collector 20 has a receiving cavity 21 for holding the material to be heated, and the inner wall of the receiving cavity 21 is provided with heat-conducting fins 22.

[0045] Specifically, by providing heat-conducting fins 22, the heat from the bottom wall of the collector 20 can be transferred more evenly to the liquid in the accommodating cavity 21.

[0046] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A light following and concentrating heating device, characterized in that, include: A reflector, used to reflect light and capable of forming a focused light spot; A solar collector for holding the material to be heated, wherein the focusing plate of the reflector projects light onto the outer wall of the solar collector to heat the solar collector; It also includes a rotatable rotating component, to which both the reflector and the collector are connected, so that the reflector and the collector can be driven to rotate synchronously through the rotating component.

2. The light chasing spotlight heating device of claim 1, wherein, The rotating assembly includes a positioning element, a rotating shaft, and a support frame; The positioning element has a positioning hole, a portion of the rotating shaft is located within the positioning hole, and the rotating shaft is capable of rotating about the axis of the positioning hole; The rotating shaft is connected to the reflector, and the solar collector is connected to the rotating shaft via the support frame.

3. The light chasing spotlight heating device of claim 2, wherein, The rotating assembly also includes a fixing frame for supporting the reflector, and the fixing frame is connected to the rotating shaft.

4. The light chasing spotlight heating device of claim 2, wherein, The positioning component is fitted with a first gear, the rotating shaft is connected to a mounting plate, the mounting plate is equipped with a drive motor, and the output shaft of the drive motor is fitted with a second gear. The second gear meshes with the first gear, and the drive motor drives the rotating shaft to rotate around the positioning hole of the positioning component.

5. The light chasing spotlight heating device of claim 4, wherein, The mounting plate is also provided with a counterweight, which is located on both sides of the rotating shaft, along with the drive motor.

6. The light chasing spotlight heating device of claim 2, wherein, The support frame includes a first connecting rod, a second connecting rod, a first support rod, and a second support rod; The first end of the first support rod is connected to the rotating shaft, one end of the first connecting rod is connected to the second end of the first support rod, and the other end of the first connecting rod is connected to the solar collector. The first end of the second support rod is connected to the rotating shaft, one end of the second connecting rod is connected to the second end of the first support rod, and the other end of the second connecting rod is connected to the solar collector.

7. The light chasing spotlight heating device of claim 6, wherein, The support frame also includes a support ring and a tie rod, the support ring having a mounting surface for mounting the solar collector; The first support rod is a telescopic component. The first end of the first support rod is hinged to the rotating shaft, the second end of the first support rod is hinged to one end of the first connecting rod, the other end of the first connecting rod is hinged to the support ring, and one end of the pull rod is hinged to the rotating shaft and the other end is hinged to the middle of the first connecting rod. One end of the second connecting rod is hinged to the support ring, and the other end of the second connecting rod is hinged to the support ring; The angle between the mounting surface of the support ring and the horizontal plane can be adjusted by driving the first support rod.

8. The light chasing spotlight heating device of claim 2, wherein, The positioning element includes a positioning post, the positioning hole is disposed at the upper end of the positioning post, and a plurality of support legs are provided at the lower end of the positioning post.

9. The light chasing spotlight heating device of claim 2, wherein, The solar collector is located above the reflector plate, which has a through clearance hole for the support frame to pass through.

10. The light chasing spotlight heating device of claim 1, wherein, The collector has a receiving cavity for holding the material to be heated, and the inner wall of the receiving cavity is provided with heat-conducting fins.

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