As shown in Figure 1, the light superimposed reflection device has a three-layer or more than three-layer ring structure, that is, the first and last mirrors of each layer are connected end to end. From the inside to the outside, the mirror unit of the first layer is a trapezoid or oblique plane. The oblique plane is an oblique line rotating around the central axis of the ring mirror by an angle of α, 0<α≤l80°; each mirror unit of the first layer corresponds to each mirror unit X of each layer from the second to the last layer and is arranged side by side in a row, and two adjacent rows of reflective units are provided with N mirror units Y on the corresponding mirror layer.
The reflection principle diagram of the mirror unit is shown in Figure 2. When the sunlight from 8₁ to 8₂ is reflected by the mirror unit, it is projected on the solar silicon wafer, and there may be a blank A in the horizontal or vertical direction. To this end, set up mirror unit groups in columns to overcome the horizontal blank A, and the reflection mirrors are stacked by layer distribution light to overcome the vertical blank A, so that the reflection line of the sunlight through each mirror unit is located on the illuminated surface of the same solar silicon wafer, which increases the solar radiation intensity received by the solar silicon wafer. Improve the utilization rate of solar silicon wafers, and improve the utilization rate of solar silicon wafers.
The first layer of light stacking mirror is composed of 8 trapezoidal mirror units 111, which are continuously arranged in a gossip-like structure. Each trapezoidal mirror unit 111 and each mirror unit X of the second-layer light superimposed mirror and the third-layer light superimposed mirror are arranged in a row of mirror unit groups 1′, as shown in Figure 3. Two adjacent rows of reflective unit groups 1’are provided with a piece of reflective mirror unit on the corresponding reflective mirror layer, wherein the reflective mirror unit X is rectangular, and the reflective mirror unit is trapezoidal. The material of the reflector unit can be made of cheap plastic plating materials, stainless steel plates, mirror surface materials, etc., so that the manufacturing cost is greatly reduced, which is conducive to market promotion.
The mirror units of the light superimposing reflection device are arranged in rows, which can be controlled to prevent the mirror units from being unable to project on the silicon wafer when part of the sunlight reflects in the lateral direction;
The mirror units are arranged in layers, which can prevent the mirror units from being unable to project on the silicon wafer when part of the sunlight reflects in the longitudinal direction;
Reflecting mirror units are arranged between two adjacent rows to make full use of the sunlight projected in the light superimposing reflection device. Keep a certain gap between the reflector unit groups in each column, which can play an air leakage effect, can effectively reduce the wind resistance, and reduce the damage to the equipment due to strong wind.
As shown in Fig. 4, the mounting bracket of a light superimposing reflection device is provided with a bearing arm 71 at the corresponding position of each column of the mirror group, and the rigid material 72 is used to pull and locate between adjacent bearing arms to form a mesh structure. The mirror unit can be placed on the corresponding grid with a certain gap to reduce resistance, which not only can effectively strengthen the load-bearing arm and play a role in positioning, but also can reduce the quality of the reflective superimposed mirror mounting bracket.
As shown in Fig. 5, the light superimposing and reflecting device can also be formed by coaxially superposing 5 layers or more of light superimposing mirrors to form a ring structure. The mirrors follow the stacking sequence from bottom to top, and the angle B between the mirror unit and the center line of the light stacking mirror gradually increases. The first layer of light superimposed reflector is composed of 8 trapezoidal reflector units, and the first layer of light superimposed reflector is composed of 8 trapezoidal reflector units continuously arranged in a gossip-like structure. Each trapezoidal mirror unit 111 corresponds to a mirror unit X of the second-layer light superimposed mirror and the third-layer light superimposed mirror to form a row of mirror unit groups. Starting from the third layer, two adjacent rows of mirror unit groups are provided with a mirror unit Y on the corresponding mirror layer, the mirror unit X is rectangular, the mirror unit Y corresponding to the third layer is trapezoidal, and the fourth layer and above are rectangular.
Each reflecting unit of the light superposition reflecting device can be equipped with 8+8 reflecting mirrors in a ring-shaped range. Therefore, the 5-layer structure can be equipped with 64 mirrors, and if it is 6-layer, 16 mirrors can be added. As long as the heat generation of the silicon wafer can be controlled, the efficiency of the silicon wafer can be maximized within a ring-shaped concentration range.
The above-mentioned light superimposed reflection device structure can choose the corresponding number of layers according to the intensity of sunlight in various places, and multi-layers can be selected for low light intensity, and on the contrary, fewer layers can be selected; the size and shape of the reflector unit X or Y can satisfy that the reflected sunlight can be completely projected on the solar wafer; the reflector unit Y between the two rows of reflector unit groups can be more than one piece, and can be triangular or other shapes; the use of a hollow reflector can reduce wind resistance and facilitate drainage, making the device more compact and lighter.