A solar photovoltaic power generation energy storage device

Abstract

The present invention relates to the field of photovoltaic power generation, and specifically to a solar photovoltaic power generation and energy storage device. It includes a mounting seat, a photovoltaic mechanism, a reflective assembly and a battery; a fixed shaft is arranged on the mounting seat; the photovoltaic mechanism includes a rotating cover and a rotating column rotatably arranged on the fixed shaft, a plurality of photovoltaic components and a plurality of fan plates evenly distributed around the central axis of the rotating cover, and a transmission assembly for rotating the rotating cover and the rotating column in opposite directions, the rotating column is located inside the rotating cover, and the photovoltaic assembly includes a roller in rolling contact with the outer peripheral surface of the rotating column, a wheel frame for mounting the roller, a sliding rod radially sliding through the rotating cover and connected to the wheel frame at one end, a photovoltaic panel connected to the other end of the sliding rod and located outside the rotating cover, and a spring sleeved on the outer peripheral side of the sliding rod and connected to the wheel frame and the inner wall of the rotating cover at both ends. The present invention has a compact structure and can automatically clean dust on the surface of the photovoltaic panel in windy weather to ensure the conversion efficiency of the photovoltaic panel to solar energy.

Description

Technical Field

[0001] The present invention relates to the field of photovoltaic power generation, and in particular to a solar photovoltaic power generation energy storage device. Background Art

[0002] Photovoltaic power generation mainly uses solar photovoltaic panels to absorb solar energy, convert it into electrical energy and store it for use. Solar energy is a renewable resource, and has the advantages of large quantity and no pollution, making it suitable for long-term collection and use.

[0003] Chinese patent announcement number CN117081472B discloses a photovoltaic power generation and energy storage device and method, including a photovoltaic panel, an adjustment component is arranged at the bottom of the photovoltaic panel, the adjustment component is used to adjust the position of the photovoltaic panel, a blocking component is arranged at the bottom of the adjustment component, the blocking component is used to block the wind, a fixing plate is arranged at the bottom of the adjustment component, a fixing component is arranged in the middle of the fixing plate, the fixing component is used to fix the position of the photovoltaic panel, and the setting of the adjustment component can make the photovoltaic panel close to the roof, so as to avoid the photovoltaic panel being subjected to strong wind force due to the large gap between the photovoltaic panel and the roof when strong wind blows, thereby avoiding the photovoltaic panel being damaged due to the strong wind force.

[0004] However, the above technical solution has the following shortcomings:

[0005] The overall size of the device is large, and dust on the surface of the photovoltaic panels is difficult to handle, resulting in a gradual decrease in the photovoltaic panel's conversion efficiency to solar energy. Summary of the invention

[0006] The purpose of the present invention is to address the problems existing in the background technology and to propose a solar photovoltaic power generation and energy storage device which has a compact structure and can automatically clean dust on the surface of photovoltaic panels in windy weather to ensure the efficiency of photovoltaic panels in converting solar energy.

[0007] The technical solution of the present invention is a solar photovoltaic power generation and energy storage device, including a mounting seat, a photovoltaic mechanism, a reflective assembly and a battery; a fixed shaft is arranged on the mounting seat; the photovoltaic mechanism includes a rotating cover and a rotating column rotatably arranged on the fixed shaft, a plurality of groups of photovoltaic components and a plurality of fan plates evenly distributed around the central axis of the rotating cover, and a transmission assembly for rotating the rotating cover and the rotating column in opposite directions, the rotating column is located on the inner side of the rotating cover, the rotating column is a regular polygonal prism structure, the photovoltaic assembly includes a roller in rolling contact with the outer peripheral surface of the rotating column, a wheel frame for mounting the roller, a sliding rod radially sliding through the rotating cover and connected to the wheel frame at one end, a photovoltaic panel connected to the other end of the sliding rod and located on the outer side of the rotating cover, and a spring sleeved on the outer peripheral side of the sliding rod and connected to the wheel frame and the inner wall of the rotating cover at both ends, the fan plates are vertically arranged on the outer peripheral surface of the rotating cover, and a plurality of fan plates are spaced between a plurality of photovoltaic panels; the reflective assembly is located on the rear side of the photovoltaic mechanism; the battery is electrically connected to the photovoltaic panel.

[0008] Preferably, the fan plate is a transparent structure.

[0009] Preferably, the cross section of the fan plate is semi-elliptical, and the thickness of the fan plate gradually decreases in the direction away from the rotating cover, refracting the sunlight to the adjacent photovoltaic panel and / or adjacent fan plate.

[0010] Preferably, the transmission assembly includes a connecting seat a arranged on the top of the rotating cover and rotatably connected to the fixed shaft, a bevel gear a arranged on the connecting seat a and coaxially distributed with the fixed shaft, a mounting sleeve arranged on the fixed shaft, an intermediate bevel gear rotatably arranged on the mounting sleeve and meshingly connected with the bevel gear a, a connecting seat b arranged on the top of the rotating column and rotatably connected to the fixed shaft, and a bevel gear b arranged on the connecting seat b and coaxially distributed with the fixed shaft, and the bevel gear b is meshingly connected with the intermediate bevel gear.

[0011] Preferably, the reflective assembly includes a mounting plate arranged on a mounting base and a plurality of reflective plates vertically distributed on the mounting plate, the plurality of reflective plates are arc-shaped plates with a fixed axis as a central axis, the plurality of reflective plates are distributed in a fan shape, and the diameters of the plurality of reflective plates gradually increase inwardly from both ends of the fan shape.

[0012] Preferably, a ventilation channel is formed between two adjacent reflective plates.

[0013] Preferably, it also includes an azimuth adjustment mechanism, which includes a mounting cover, a support arranged inside the mounting cover, a screw rotatably arranged on the support, a motor arranged on the support and drivingly connected to the screw, a screw nut threadedly connected to the screw, a moving platform connected to the screw nut, a rack horizontally arranged on the moving platform, an incomplete gear meshing with the rack, and a rotating shaft rotatably arranged on the mounting cover and connected to the incomplete gear and the mounting seat, a battery is arranged in the mounting cover, and a light tracking sensor and a central controller are arranged on the mounting cover, the light tracking sensor is communicatively connected to the central controller, and the central controller is control-connected to the motor.

[0014] Preferably, an outer conductive ring coaxially distributed with the fixed axis is provided on the rotating cover, a cable passing through the rotating cover is electrically connected between the photovoltaic panel and the outer conductive ring, an inner conductive ring electrically and rotationally connected to the outer conductive ring is coaxially provided on the fixed axis, a cable passing through the mounting cover is electrically connected between the inner conductive ring and the battery, a threading channel for the cable to pass through is provided at the bottom of the fixed axis, and the mounting seat has a through hole for the cable to pass through.

[0015] Compared with the prior art, the present invention has the following beneficial technical effects:

[0016] The present invention has a compact structure, and multiple groups of photovoltaic modules are evenly distributed around the rotating cover. No matter where the sun moves, there are photovoltaic modules that can effectively receive light to convert solar energy into electrical energy. Photovoltaic panels can directly and indirectly receive light to generate electricity, which improves the efficiency of photovoltaic power generation in a compact space. In addition, the device can automatically clean the dust on the surface of the photovoltaic panel in windy weather to ensure the efficiency of the photovoltaic panel in converting solar energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of an embodiment of the present invention;

[0018] Figure 2 for Figure 1 A partial structural cross-sectional view;

[0019] Figure 3 for Figure 2 A magnified view of the structure at center A;

[0020] Figure 4 for Figure 2 A magnified view of the structure at B in the middle;

[0021] Figure 5 for Figure 2 A magnified view of the structure at C in the middle;

[0022] Figure 6 Schematic diagram of the projection distribution of photovoltaic panels, fan panels and reflective panels along the length direction.

[0023] : Illustrations: 1. mounting seat; 101. through hole; 2. fixed axis; 201. threading channel; 3. rotating cover; 4. rotating column; 401. groove; 5. roller; 6. wheel frame; 7. slide bar; 8. photovoltaic panel; 9. spring; 10. folding cylinder; 11. fan plate; 12. connecting seat a; 13. bevel gear a; 14. mounting sleeve; 15. intermediate bevel gear; 16. bevel gear b; 17. connecting seat b; 18. outer conductive ring; 19. inner conductive ring; 20. cable; 21. battery; 22. mounting cover; 23. light tracking sensor; 24. support; 25. motor; 26. screw; 27. screw nut; 28. moving platform; 29. ​​rack; 30. incomplete gear; 31. rotating shaft; 32. mounting plate; 33. reflector; 34. supporting seat. DETAILED DESCRIPTION

[0024] Embodiment 1

[0025] like Figure 1-Figure 6 As shown, a solar photovoltaic power generation and energy storage device proposed in this embodiment includes a mounting seat 1, a photovoltaic mechanism, a reflective component and a battery 21.

[0026] A fixed shaft 2 is arranged on the mounting seat 1 .

[0027] The photovoltaic mechanism includes a rotating cover 3 and a rotating column 4 rotatably arranged on a fixed shaft 2, a plurality of photovoltaic components and a plurality of fan plates 11 evenly distributed around the central axis of the rotating cover 3, and a transmission component for rotating the rotating cover 3 and the rotating column 4 in opposite directions. The rotating column 4 is located inside the rotating cover 3 and is a regular polygonal prism structure. The photovoltaic component includes a roller 5 in rolling contact with the outer peripheral surface of the rotating column 4, a wheel frame 6 for mounting the roller 5, a sliding rod 7 radially slidingly penetrating the rotating cover 3 and connected to the wheel frame 6 at one end, a photovoltaic panel 8 connected to the other end of the sliding rod 7 and located outside the rotating cover 3, and a spring 9 sleeved on the outer peripheral side of the sliding rod 7 and connected to the wheel frame 6 and the inner wall of the rotating cover 3 at both ends. In each group of photovoltaic components, at least two sliding rods 7 can be designed. A folding cylinder 10 can be added between the outer surface of the rotating cover 3 and the photovoltaic panel 8, and the sliding rod 7 is located inside the folding cylinder 10, and the folding cylinder 10 plays a shielding and protective role.

[0028] The fan plates 11 are vertically arranged on the outer circumference of the rotating cover 3, and a plurality of fan plates 11 are spaced and distributed between a plurality of photovoltaic panels 8. In windy weather, the fan plates 11 can be blown by the wind, thereby driving the rotating cover 3 to rotate, and the rotating cover 3 drives the rotating column 4 to rotate in the opposite direction through the transmission assembly, and the roller 5 rolls on the outer circumference of the rotating column 4, the sliding rod 7 has a higher reciprocating sliding frequency, the spring 9 has a higher reciprocating expansion and contraction frequency, and the photovoltaic panel 8 has a high vibration frequency, which can more effectively shake off the dust attached to the photovoltaic panel 8, and at the same time cooperate with the wind to effectively clean up the dust.

[0029] An arc-shaped groove 401 can be designed on the outer side of the rotating column 4, and the groove 401 is located in the middle of the outer side of the rotating column 4. When the wind force is strong enough, the roller 5 will roll out from the groove 401. If the wind force is weak, the roller 5 will remain in the groove 401. When the wind force is strong enough, the roller 5 rolls and the dust on the photovoltaic panel 8 is shaken off, as the wind force gradually decreases, the roller 5 will eventually roll to the groove 401 and maintain a relatively stable state. If the groove 401 is not designed on the outer side of the rotating column 4, the roller 5 will eventually stop in the middle of the outer side of the rotating column 4, but the stability is slightly weaker than when the groove 401 is designed. When the wind force is not strong, the roller 5 moves back and forth on an outer side of the rotating column 4, and the photovoltaic panel 8 will also vibrate slightly, which can achieve a certain degree of vibration dust removal.

[0030] The reflective assembly is located at the rear side of the photovoltaic mechanism. The reflective assembly includes a mounting plate 32 arranged on the mounting seat 1 and a plurality of reflective panels 33 vertically distributed on the mounting plate 32. The plurality of reflective panels 33 are all arc-shaped panels with the fixed axis 2 as the central axis. The plurality of reflective panels 33 are distributed in a fan-shaped manner, and the diameters of the plurality of reflective panels 33 gradually increase in the order from the two ends of the fan-shaped direction inward. A ventilation channel is formed between two adjacent reflective panels 33, so that the wind can pass through the ventilation channel, thereby reducing the wind force borne by the device. If the wind flows in from between the rotating cover 3 and one side of the reflective assembly, it will pass through the ventilation channel on the other side of the reflective assembly; if the wind comes from the rear side or the left and right sides of the reflective assembly, it will directly pass through the ventilation channel. A certain distance is maintained between the reflective assembly and the rotating cover 3, so that the shadow of the rotating cover 3 will not completely cover the reflective panel 33. At this time, the reflective panel 33 can reflect light to the photovoltaic panel 8 on the back side.

[0031] The storage battery 21 is electrically connected to the photovoltaic panel 8 , and the photovoltaic panel 8 stores the electrical energy converted from solar energy in the storage battery 21 .

[0032] The present embodiment has a compact structure, and multiple groups of photovoltaic components are evenly distributed around the rotating cover 3. No matter what direction the sun moves to, there are photovoltaic components that can effectively receive light to convert solar energy into electrical energy. The sunlight can directly irradiate the photovoltaic panel 8 on the front side facing the sun, and the reflective component increases the number of photovoltaic components that can receive light. The reflective component can reflect the sunlight to the photovoltaic panel 8 on the back side, realizing indirect irradiation of sunlight and improving the photovoltaic power generation efficiency in a compact space. The device can automatically clean the dust on the surface of the photovoltaic panel 8 in windy weather to ensure the conversion efficiency of the photovoltaic panel 8 to solar energy. The strong wind can blow the fan plate 11 to rotate, and the fan plate 11 drives the rotating cover 3 to rotate. The rotating cover 3 drives the rotating column 4 to rotate in the opposite direction through the transmission component, so the relative speed between the rotating cover 3 and the rotating column 4 is improved, and the roller 5 can roll on the outer peripheral surface of the rotating column 4 at a faster speed. The slide bar 7 moves back and forth, and the photovoltaic panel 8 vibrates, which can effectively shake off the dust on the photovoltaic panel 8, and the strong wind can also effectively blow away the dust.

[0033] Embodiment 2

[0034] like Figure 1 , Figure 2 and Figure 6 As shown, the present embodiment proposes a solar photovoltaic power generation and energy storage device. Compared with the first embodiment, in the present embodiment, the fan plate 11 is a transparent structure, so the fan plate 11 can transmit light, thereby expanding the number of photovoltaic panels 8 that can receive light.

[0035] The fan plate 11 can be further designed to have a semi-elliptical cross-section. The thickness of the fan plate 11 gradually decreases in the direction away from the rotating cover 3, and can refract sunlight to the adjacent photovoltaic panel 8 and / or the adjacent fan plate 11. When the fan plate 11 refracts light, the light has already irradiated the adjacent photovoltaic panel 8 and / or the adjacent fan plate 11 before it passes through the fan plate 11 and reaches the focus of refraction. Because the distribution positions of different fan plates 11 are different, some fan plates 11 will refract light to the adjacent photovoltaic panel 8 on the rear side, some fan plates 11 will refract light to the adjacent photovoltaic panel 8 on the rear side and the adjacent fan plate 11 on the rear side at the same time, and some fan plates 11 will refract light to the adjacent fan plate 11 on the rear side. Similarly, the adjacent fan plate 11 on the rear side will refract light to the adjacent photovoltaic panel 8 and / or the adjacent fan plate 11. By analogy, the light can be refracted to the photovoltaic panel 8 in the end, so that the photovoltaic panel 8 on the back side can also receive light, which effectively expands the light receiving area of ​​the photovoltaic panel 8 and improves the solar energy conversion efficiency.

[0036] Embodiment 3

[0037] This embodiment proposes a solar photovoltaic power generation and energy storage device. Compared with the first embodiment, in this embodiment, Figure 3 As shown, the transmission assembly includes a connection seat a12 arranged on the top of the rotating cover 3 and rotatably connected to the fixed shaft 2, a bevel gear a13 arranged on the connection seat a12 and coaxially distributed with the fixed shaft 2, a mounting sleeve 14 arranged on the fixed shaft 2, an intermediate bevel gear 15 rotatably arranged on the mounting sleeve 14 and meshingly connected with the bevel gear a13, a connection seat b17 arranged on the top of the rotating column 4 and rotatably connected to the fixed shaft 2, and a bevel gear b16 arranged on the connection seat b17 and coaxially distributed with the fixed shaft 2, and the bevel gear b16 is meshingly connected with the intermediate bevel gear 15. When the rotating cover 3 rotates, the bevel gear a13 can be driven to rotate through the connection seat a12, the bevel gear a13 drives the intermediate bevel gear 15 to rotate, the intermediate bevel gear 15 drives the connection seat b17 to rotate through the bevel gear b16, and the connection seat b17 drives the rotating column 4 to rotate in the opposite direction. The transmission assembly has a compact structure and stable transmission.

[0038] Embodiment 4

[0039] like Figure 1-Figure 6As shown, a solar photovoltaic power generation and energy storage device proposed in this embodiment, compared with the first embodiment, in this embodiment, the solar photovoltaic power generation and energy storage device also includes an azimuth adjustment mechanism, which includes a mounting cover 22, a support 24 arranged inside the mounting cover 22, a screw 26 rotatably arranged on the support 24, a motor 25 arranged on the support 24 and drivingly connected to the screw 26, a screw nut 27 threadedly connected to the screw 26, a moving platform 28 connected to the screw nut 27, a rack 29 horizontally arranged on the moving platform 28, an incomplete gear 30 meshingly connected to the rack 29, and a rotating shaft 31 rotatably arranged on the mounting cover 22 and connected to the incomplete gear 30 and the mounting seat 1, and a battery 21 is arranged in the mounting cover 22. A light tracking sensor 23 and a central controller are arranged on the mounting cover 22, the light tracking sensor is connected to the central controller for communication, and the central controller is connected to the motor 25 for control. The battery 21 can power the motor 25, the light tracking sensor 23 and the central controller.

[0040] The light tracking sensor 23 detects the sun's position and transmits the detection data to the central controller, which controls the motor 25. The motor 25 drives the screw 26 to rotate, the screw 26 drives the screw nut 27 to move, the screw nut 27 drives the moving platform 28 to move, the moving platform 28 drives the rack 29 to move, the rack 29 drives the incomplete gear 30 to rotate, the incomplete gear 30 drives the mounting base 1 to rotate through the rotating shaft 31, thereby driving the rotating cover 3 to rotate, adjusting the tilt position of the photovoltaic panel 8, so that the photovoltaic panel 8 on the front side rotates toward the sun. In order to prevent the rotating cover 3 from causing a large shielding of the reflective component, the rotating cover 3 can be adjusted to a position lower than the vertical position facing the sun, so that the reflective component can effectively reflect light and reflect the light to the photovoltaic panel 8 on the back side, and the photovoltaic panels 8 on the front and back sides can generate electricity at the same time.

[0041] A support seat 34 may be added to the rear side of the mounting cover 22 to improve the stability of the entire solar photovoltaic power generation and energy storage device, so that the entire device is not prone to tipping over.

[0042] like Figure 2 and Figure 4As shown, the rotating cover 3 is provided with an outer conductive ring 18 coaxially distributed with the fixed shaft 2, a cable passing through the rotating cover 3 is electrically connected between the photovoltaic panel 8 and the outer conductive ring 18, an inner conductive ring 19 electrically and rotationally connected with the outer conductive ring 18 is coaxially provided on the fixed shaft 2, a cable 20 passing through the mounting cover 22 is electrically connected between the inner conductive ring 19 and the storage battery 21, the bottom of the fixed shaft 2 has a threading channel 201 for the cable 20 to pass through, and the mounting seat 1 has a through hole 101 for the cable 20 to pass through. The electricity generated by the photovoltaic panel 8 is transmitted to the storage battery 21 for storage through the cable, the outer conductive ring 18, the inner conductive ring 19 and the cable 20, and the outer conductive ring 18 and the inner conductive ring 19 are rotationally connected, and the power can be effectively transmitted without hindering the smooth rotation of the rotating cover 3.

[0043] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto, and various changes can be made within the knowledge scope of technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A solar photovoltaic power generation and energy storage device, characterized in that: include: A mounting seat (1) on which a fixed shaft (2) is disposed; A photovoltaic mechanism, comprising a rotating cover (3) and a rotating column (4) rotatably arranged on a fixed shaft (2), a plurality of photovoltaic components and a plurality of fan plates (11) uniformly distributed around the central axis of the rotating cover (3), and a transmission component for rotating the rotating cover (3) and the rotating column (4) in opposite directions, wherein the rotating column (4) is located inside the rotating cover (3) and is a regular polygonal prism structure, the photovoltaic component comprising a roller (5) in rolling contact with the outer peripheral surface of the rotating column (4), a wheel frame (6) for mounting the roller (5), a sliding rod (7) radially slidingly penetrating the rotating cover (3) and connected to the wheel frame (6) at one end, a photovoltaic panel (8) connected to the other end of the sliding rod (7) and located outside the rotating cover (3), and a spring (9) sleeved on the outer peripheral side of the sliding rod (7) and connected to the wheel frame (6) and the inner wall of the rotating cover (3) at both ends, the fan plates (11) being vertically arranged on the outer peripheral surface of the rotating cover (3), and a plurality of fan plates (11) being distributed between a plurality of photovoltaic panels (8) at intervals; A reflective component, which is located at the rear side of the photovoltaic mechanism; A storage battery (21) electrically connected to the photovoltaic panel (8); The transmission assembly comprises a connecting seat a (12) arranged on the top of the rotating cover (3) and rotatably connected to the fixed shaft (2), a bevel gear a (13) arranged on the connecting seat a (12) and coaxially distributed with the fixed shaft (2), a mounting sleeve (14) arranged on the fixed shaft (2), an intermediate bevel gear (15) rotatably arranged on the mounting sleeve (14) and meshingly connected with the bevel gear a (13), a connecting seat b (17) arranged on the top of the rotating column (4) and rotatably connected to the fixed shaft (2), and a bevel gear b (16) arranged on the connecting seat b (17) and coaxially distributed with the fixed shaft (2), wherein the bevel gear b (16) is meshingly connected with the intermediate bevel gear (15); The device also includes an azimuth adjustment mechanism, which includes a mounting cover (22), a support (24) disposed inside the mounting cover (22), a screw (26) rotatably disposed on the support (24), a motor (25) disposed on the support (24) and drivingly connected to the screw (26), a screw nut (27) threadedly connected to the screw (26), a moving platform (28) connected to the screw nut (27), a rack (29) disposed horizontally on the moving platform (28), an incomplete gear (30) meshingly connected to the rack (29), and a rotating shaft (31) rotatably disposed on the mounting cover (22) and connected to the incomplete gear (30) and the mounting seat (1), a battery (21) disposed inside the mounting cover (22), a light tracing sensor (23) and a central controller disposed on the mounting cover (22), the light tracing sensor being communicatively connected to the central controller, and the central controller being control-connected to the motor (25); An outer conductive ring (18) coaxially distributed with the fixed shaft (2) is arranged on the rotating cover (3); a cable passing through the rotating cover (3) is electrically connected between the photovoltaic panel (8) and the outer conductive ring (18); an inner conductive ring (19) coaxially connected to the outer conductive ring (18) for electrical rotation is arranged on the fixed shaft (2); a cable (20) passing through the mounting cover (22) is electrically connected between the inner conductive ring (19) and the storage battery (21); a threading channel (201) for the cable (20) to pass through is provided at the bottom of the fixed shaft (2); and the mounting seat (1) has a through hole (101) for the cable (20) to pass through.

2. A solar photovoltaic power generation and energy storage device according to claim 1, characterized in that: The fan plate (11) is a transparent structure.

3. A solar photovoltaic power generation and energy storage device according to claim 2, characterized in that: The fan plate (11) has a semi-elliptical cross section, and the thickness of the fan plate (11) gradually decreases in a direction away from the rotating cover (3), thereby refracting sunlight onto adjacent photovoltaic panels (8) and / or adjacent fan plates (11).

4. A solar photovoltaic power generation and energy storage device according to claim 1, characterized in that: The reflective assembly comprises a mounting plate (32) arranged on a mounting seat (1) and a plurality of reflective plates (33) vertically distributed on the mounting plate (32); the plurality of reflective plates (33) are all arc-shaped plates with a fixed axis (2) as a central axis; the plurality of reflective plates (33) are distributed in a fan-shaped manner, and the diameters of the plurality of reflective plates (33) gradually increase in sequence from both ends of the fan-shaped plate inward.

5. A solar photovoltaic power generation and energy storage device according to claim 4, characterized in that: A ventilation channel is formed between two adjacent reflective plates (33).

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