阅读说明：本技术 一种碟式太阳能聚光镜 (Disc type solar condenser ) 是由 于献榕 于 2020-04-22 设计创作，主要内容包括：本发明涉及一种碟式太阳能聚光镜。该碟式太阳能聚光镜由一次反光镜和二次反光镜组成；一次反光镜上安装了若干个由平面镜切割而成的小镜片,可将入射光线反射到二次反光镜上；二次反光镜由整块平面镜切割而成,可将一次反光镜反射过来的入射光线再次反射到指定区域内。本发明的制造材料主要是塑料和平面镜,制造成本远低于传统的抛物面反光镜,适用于不需要高精度点聚焦、只需将阳光大致地聚集到指定区域内即可的应用场景。(The invention relates to a disc type solar condenser. The disc type solar condenser consists of a primary reflector and a secondary reflector; a plurality of small lenses cut by plane mirrors are arranged on the primary reflector, and incident light can be reflected to the secondary reflector; the secondary reflector is formed by cutting a whole plane mirror, and can reflect incident light reflected by the primary reflector to a designated area again. The manufacturing materials of the invention are mainly plastic and plane mirrors, the manufacturing cost is far lower than that of the traditional parabolic reflector, and the invention is suitable for application scenes which do not need high-precision point focusing and only need to approximately gather sunlight into a designated area.)

1. The utility model provides a dish formula solar energy condensing lens which characterized in that: comprises a primary reflector (1) and a secondary reflector (2);

the primary reflector (1) is formed by splicing a plurality of primary reflector components (3) and is a sunny surface facing to incident light; the primary mirror assembly (3) comprises a small mirror (5) and a small mirror support (4); the small lens (5) is a plane mirror and is arranged on the sunny surface of the small lens support (4) to form a reflecting surface of the primary reflector (1), and the reflecting surface of the primary reflector (1) can reflect the incident light (12) to the secondary reflector (2);

the reflecting surface of the secondary reflector (2) is opposite to the reflecting surface of the primary reflector (1), and the reflecting surface of the secondary reflector (2) can reflect the incident light (12) reflected by the primary reflector (1) to a designated area called a light collecting area (7);

the plane where the edge profile of the secondary reflector (2) is located is a secondary reflector reference surface (6); the secondary mirror reference surface (6) is parallel to the plane where the edge profile of the primary reflective mirror (1) is located;

the edge profile of the primary reflector (1) is similar to the edge profile of the secondary reflector (2) in shape; connecting the centroid of the edge profile of the primary reflector (1) with the centroid of the edge profile of the secondary reflector (2) to obtain a straight line which is a central connecting line (8); the central connecting line (8) is vertical to the secondary mirror reference surface (6).

2. The solar concentrator of claim 1, wherein: the edge profiles of the primary reflector (1) and the secondary reflector (2) are circular or polygonal.

3. The solar concentrator of claim 1, wherein: the primary reflector (1) is a hollow annular structure, and the edges of the annular structure are an outer ring (14) and an inner ring (15); a small lens (5) is laid between the outer ring (14) and the inner ring (15); a heat storage container (17) is arranged in the inner ring (15); the plane where the inner ring (15) is located is a primary mirror reference plane (16); the primary mirror reference surface (16) is parallel to the secondary mirror reference surface (6).

4. The solar concentrator of claim 1, wherein: the light collecting area (7) is the surface, closest to the secondary reflector (2), of the heat storage container (17) on the heat insulation glass window (25); if the incident light (12) can be reflected to the light collecting region (7) by the primary reflector (1) and the secondary reflector (2), the light can enter the heat storage container (17) without fail.

5. The solar concentrator of claim 1, wherein: the secondary reflector (2) is a plane mirror, a spherical convex mirror or a spherical concave mirror.

6. The solar concentrator of claim 1, wherein: the section of the small lens support (4) comprises a plurality of section line segments (11); the section line segments (11) are sequentially connected end to form a continuous broken line; the greater the distance between the midpoint of the profile line segment (11) and the center connecting line (8), the greater the slope of the profile line segment (11); the length and the slope of the section line segment (11) can ensure that incident light (12) is reflected into the light collecting region (7) by the primary reflector (1) and the secondary reflector (2) and cannot be blocked by the shell of the heat storage container (17).

7. The solar concentrator of claim 6, wherein: the method for determining a profile line segment (11) comprises the following steps:

step1, selecting design parameters of a condenser according to actual application scenes and requirements of customers:

f: the radius F of the primary reflector (1);

r: when the secondary reflector (2) is a spherical mirror, the spherical radius of the secondary reflector (2) is larger than the spherical radius of the spherical mirror;

h: the distance between the primary mirror reference surface (16) and the secondary mirror reference surface (6);

h: the distance between the light collection area (7) and the primary mirror reference surface (16);

d: the radius of the edge profile of the secondary reflector (2);

d: the radius of the edge profile of the light collecting area (7);

step 2, making a cross-sectional contour line (34) of the shell of the heat storage container (17) on an XY plane;

step 3, drawing a line segment L on the XY plane diagram_d(33) A representative light-collecting region (7); line segment L_d(33) The function of (d) is: h, x belongs to (D-D, D + D), and the coordinates of the middle point are as follows: (D, h);

step 4, drawing a line segment L on the XY plane diagram_D(35) Represents the projection of the profile of the secondary reflector (2) in the X-axis direction; line segment L_D(35) The function of (d) is: h, x ∈ (0,2D), and the midpoint coordinate is: (D, H);

step 5, passing line section L_D(35) Two end points of the curve function S of the profile contour of the quadratic reflector_D；

If the secondary mirror is a plane mirror, the curve function S_D(50) Comprises the following steps: h, x ∈ (0, 2D);

if the quadratic mirror is a spherical convex mirror, the curve function S_D(51) Comprises the following steps:

if the secondary reflector is a spherical concave mirror, the curve function S_D(52) Comprises the following steps:

step6, passing line section L_d(33) And line segment L_D(35) The middle point of (2) is taken as a central connecting line (8); the function of the center line (8) is: x is D;

step7, selecting point (x)₁,y₁) (37), the value range is: x is the number of₁≥2D，y₁0; passing point (x)₁,y₁) (37) making a slope k₁Length of l₁Line segment L of₁(36) The line represents the section of the small lens (5); line segment L₁(36) The function of (d) is: k is₁(x-x₁)+y₁,x∈(x₁，x₁+l₁cos(tan^-1(k₁)))；

Step 8, passing line section L₁(36) Starting point (x) of (c)₁,y₁) (37) as incident light ray P₀(38) (ii) a Incident light ray P₀(38) The function of (d) is: x ═ x₁；

Step 9, passing line section L₁(36) End point of (1) as incident ray T₀(39) (ii) a Incident ray T₀(39) The function of (d) is: x ═ x₁+l₁cos(tan^-1(k₁))；

Step 10, segment L₁(36) The incident light P is calculated according to the optical reflection law and is regarded as the section of a plane reflector₀(38) Primary reflected light ray P₁(40) (ii) a Primary reflected light ray P₁(40) The slope of (d) is: k is a radical of_P1＝tan(π/2+2tan^-1(k₁) Functions are: y-tan (pi/2 +2 tan)^-1(k₁))(x-x₁)+y₁,x∈(-∞，x₁)；

Step 11, segment L₁(36) The incident ray T is calculated according to the law of optical reflection₀(39) Primary reflected light ray T₁(41) (ii) a Primary reflected light ray T₁(41) The slope of (d) is: k is a radical of_T1＝tan(π/2+2tan^-1(k₁) Functions are: y-tan (pi/2 +2 tan)^-1(k₁))(x-x₁-l₁cos(tan^-1k₁))+k₁l₁cos(tan^-1(k₁))++y₁,x∈(-∞,x₁+cos(tan^-1k₁))；

Step 12, calculating the primary reflected light P₁(40) And the section curve S_DCross point (x) of₂,y₂)(42)；

Step 13, calculating the primary reflected ray T₁(41) And the section curve S_DCross point (x) of₃,y₃)(43)；

Step 14, passing Point (x)₂,y₂) (42) making a primary reflected light ray P₁(40) In the section curve S_DUpper secondary reflected light ray P₂(44)；

If the secondary reflector is a flat mirror, the secondary reflected light ray P₂(44) The slope of (d) is: k is a radical of_P1＝tan(π-tan^-1(k₁) Functions are: y-tan (pi-tan)^-1(k₁))×(x-x₂)+y₂，x∈(-∞,x₂)；

If the secondary reflector is a spherical convex mirror, the secondary reflected light P₂(44) The slope of (d) is: k is a radical of_P2＝tan(tan^-1k_P1-2θ₁) The function is: y is tan (tan)^-1k_P1-2θ₁)(x-x₂)+y₂,x∈(-∞,x₂) Wherein theta₁＝tan^-1|(k_m1-k_P1)/(1+k_m1k_P1)|，

If the secondary reflector is a spherical concave mirror, the secondary reflected light ray P₂(44) The slope of (d) is: k is a radical of_P2＝tan(tan^-1k_P1-2θ₁) The function is: y is tan (tan)^-1k_P1-2θ₁)(x-x₂)+y₂,x∈(-∞,x₂) Wherein theta₁＝tan^-1|(k_m1-k_P1)/(1+k_m1k_P1)|，

Step15, passing Point (x)₃,y₃) (43) making a primary reflected ray T₁(41) In the section curve S_DUpper secondary reflected ray T₂(45)；

If the secondary reflector is a plane mirror, the secondary reflected light ray T₂(45) The slope of (d) is: k is a radical of_T1＝tan(π-tan^-1(k₁) Functions are: y-tan (pi-tan)^-1(k₁))×(x-x₃)+y₃,x∈(-∞，x₃)；

If the secondary reflector is a spherical convex mirror, the secondary reflected light ray T₂(45) The slope of (d) is: k is a radical of_T2＝tan(tan^-1k_T1-2θ₂) The function is: y is tan (tan)^-1k_T1-2θ₂)(x-x₃)+y₃，x∈(-∞，x₃) Wherein theta₂＝tan^-1|(k_m2-k_T1)/(1+k_m2k_T1)|，

If the secondary reflector is a spherical concave mirror, the secondary reflected light ray T₂(45) The slope of (d) is: k is a radical of_T2＝tan(tan^-1k_T1-2θ₂) The function is: y is tan (tan)^-1k_T1-2θ₂)(x-x₃)+y₃,x∈(-∞,x₃) Wherein theta₂＝tan^-1|(k_m2-k_T1)/(1+k_m2k_T1)|，

Step16, calculating the secondary reflected light P₂(44) And line segment L_d(33) The intersection point of (a); if the light ray P is reflected twice₂(44) And line segment L_d(33) Intersecting at a suitable position and not intersecting the edge contour (34) of the outer shell of the heat accumulation container (17), the next Step17 is performed; otherwise change the line segment L₁(36) Slope k of₁And length l₁And repeating all the steps from Step7 to Step15 until the secondary reflected light ray P₂(44) And line segment L_d(33) Intersects the edge contour (34) of the outer shell of the heat storage container (17) at a proper position and does not intersect the edge contour;

step17, calculating the secondary reflected ray T₂(45) And line segment L_d(33) The intersection point of (a); if the light ray T is reflected twice₂(45) And line segment L_d(33) Intersecting at a suitable position and not intersecting the edge contour (34) of the outer shell of the heat accumulation container (17), the next Step18 is performed; otherwise change the line segment L₁(36) Slope k of₁And length l₁And repeating all the steps from Step7 to Step16 until the secondary reflected light ray T₂(45) And line segment L_d(33) Intersects the edge contour (34) of the outer shell of the heat storage container (17) at a proper position and does not intersect the edge contour;

step18, selecting line segment L₁(36) Is taken as a starting point, and a slope of k is taken as₂Length of l₂Line segment L of₂(46) (ii) a Repeating the steps from Step7 to Step17 until the incident ray is divided by the line segment L₂(46) And profile curve S of secondary reflector_DThe secondary reflected light obtained by reflection is all related to the line segment L_d(33) Intersecting at a suitable position;

step19, repeating the steps from Step7 to Step18 until the maximum distance between the section line segment (11) of the primary reflector (1) and the center connecting line (8) is equal to the radius F of the primary reflector (1);

step 20, adjusting the slope k of all section line segments (11) of the primary reflector (1)₁And length l₁Repeating the steps from Step6 to Step19 until all the secondary reflected rays are aligned with the line segment L_d(33) Intersecting at the appropriate location.

8. The solar concentrator of claim 1, wherein: the number of the primary reflector assemblies (3) is 6.

Technical Field

The invention relates to the technical field of solar condensation, in particular to a disc type solar condenser.

Background

At present, the disc type solar energy condenser is mainly applied to the disc type photo-thermal power generation technology. The basic principle of the disc type photo-thermal power generation technology is that sunlight is focused to be used as a heat source, and a Stirling engine is directly driven to do work to generate power. In order to ensure the thermal efficiency of the Stirling engine, the temperature of a heat source must reach thousands of degrees, which puts high requirements on the light condensation precision of the disc type solar condenser; in order to meet the high light condensation requirement, the existing dish type solar energy condenser adopts a paraboloidal reflector with high processing precision.

If the application scenario does not require as high a point focusing accuracy and heating temperature, but rather concentrates sunlight roughly into a specified area (such as patent 2018102799515, distributed solar thermal storage), the existing dish solar concentrator is not economically feasible because it has two major drawbacks: (1) the high-precision parabolic reflector has high manufacturing cost, and finally the cost of the whole system is difficult to reduce, which is also one of the reasons that the dish type photo-thermal power generation technology cannot be used for large-scale commercial use; (2) the Stirling engine is generally arranged at the focus of the parabolic reflector, and the moment relative to the supporting point of the sun tracking mechanism is very large, so that the power and the energy consumption of the sun tracking mechanism are very large, the manufacturing cost is increased, and the economic benefit is reduced.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides the disc type solar condenser with simple structure and low cost, which is suitable for application scenes which do not need high-precision point focusing and only need to approximately concentrate sunlight into a specified area.

The technical scheme of the invention is as follows:

a disc type solar condenser comprises a primary reflector 1 and a secondary reflector 2;

the primary reflector 1 is formed by splicing a plurality of primary reflector components 3 and is a sunny surface facing to incident light; the primary mirror assembly 3 comprises a small lens 5 and a small lens holder 4; the small lens 5 is a plane mirror and is arranged on the sunny side of the small lens support 4 to form a reflecting surface of the primary reflector 1, and the reflecting surface of the primary reflector 1 can reflect the incident light 12 to the secondary reflector 2;

the reflecting surface of the secondary reflector 2 is opposite to the reflecting surface of the primary reflector 1, and the reflecting surface of the secondary reflector 2 can reflect the incident light 12 reflected by the primary reflector 1 to a designated area called a light collecting area 7;

the plane where the edge profile of the secondary reflector 2 is located is a secondary reflector reference surface 6; the secondary mirror reference surface 6 is parallel to the plane where the edge profile of the primary reflective mirror 1 is located;

the edge profile of the primary reflector 1 is similar to the edge profile of the secondary reflector 2 in shape; connecting the centroid of the edge profile of the primary reflector 1 with the centroid of the edge profile of the secondary reflector 2 to obtain a straight line which is a central connecting line 8; the central connecting line 8 is perpendicular to the secondary mirror reference plane 6.

Preferably, the edge profiles of the primary reflecting mirror 1 and the secondary reflecting mirror 2 are circular or polygonal.

Preferably, the primary reflector 1 is a hollow ring-shaped structure, and the edges of the ring-shaped structure are an outer ring 14 and an inner ring 15; a small lens 5 is laid between the outer ring 14 and the inner ring 15; the heat storage container 17 is placed inside the inner ring 15; the plane of the inner ring 15 is a primary mirror reference plane 16; the primary mirror reference surface 16 is parallel to the secondary mirror reference surface 6.

Preferably, the light collecting area 7 is the surface of the heat storage container 17 closest to the secondary reflector 2 on the insulating glass window 25; if the incident light 12 can be reflected by the primary mirror 1 and the secondary mirror 2 to the light collecting region 7, it is certainly possible to enter the inside of the heat storage container 17.

Preferably, the secondary reflector 2 is a plane mirror, a spherical convex mirror or a spherical concave mirror.

Preferably, the section of the small lens support 4 comprises several section line segments 11; the section line segments 11 are sequentially connected end to form a continuous broken line; the greater the distance between the midpoint of the profile line segment 11 and the center connecting line 8, the greater the slope of the profile line segment 11; the length and slope of the profile line segment 11 are chosen to ensure that the incident light 12 is reflected by the primary reflector 1 and the secondary reflector 2 into the light collection region 7 and is not blocked by the housing of the heat storage container 17.

Preferably, the method of determining the section line segment 11 comprises the following steps:

step1, selecting design parameters of a condenser according to actual application scenes and requirements of customers:

f: radius F of the primary mirror 1;

r: when the secondary reflector 2 is a spherical mirror, the spherical radius of the secondary reflector 2 is larger;

h: the distance between the primary mirror reference surface 16 and the secondary mirror reference surface 6;

h: the distance between the light collection area 7 and the primary mirror reference plane 16;

d: radius of the edge profile of the secondary mirror 2;

d: the radius of the edge profile of the light collecting area 7;

step 2, drawing a cross-sectional outline 34 of the outer shell of the thermal storage container 17 on an XY plane;

step 3, drawing a line segment L on the XY plane diagram_d33 denotes a light-collecting region 7; line segment L_dThe function of 33 is: h, x belongs to (D-D, D + D), and the coordinates of the middle point are as follows: (D, h);

step 4, drawing a line segment L on the XY plane diagram_D35 represents the projection of the profile of the secondary mirror 2 in the X-axis direction; line segment L_DThe function of 35 is: h, x ∈ (0,2D), and the midpoint coordinate is: (D, H);

step 5, passing line section L_D35 as a function S of the profile of the quadratic mirror_D；

If the secondary mirror is a plane mirror, the curve function S_D50 is as follows: h, x ∈ (0, 2D);

if the quadratic mirror is a spherical convex mirror, the curve function S_D51 is as follows: x∈(0,2D)；

if the secondary reflector is a spherical concave mirror, the curve function S_D52 is: x∈(0,2D)；

step6, passing line section L_d33 and line segment L_DThe midpoint of 35 is taken as a central connecting line 8; the function of the center connecting line 8 is: x is D;

step7, selecting point (x)₁,y₁)37, the value range is: x is the number of₁≥2D，y₁0; passing point (x)₁,y₁)37 as a slope k₁Length of l₁Line segment L of₁36, the line segment representing the cross section of the small lens 5; line segment L₁The function of 36 is: k is₁(x-x₁)+y₁,x∈(x₁,x₁+l₁ cos(tan^-1(k₁)))；

Step 8, passing line section L₁Starting point of 36 (x)₁,y₁)37 as incident light P₀38; incident light ray P₀The function of 38 is: x ═ x₁；

Step 9, passing line section L₁36 as incident ray T₀39; incident ray T₀The function of 39 is: x ═ x₁+l₁cos(tan^-1(k₁))；

Step 10, segment L₁36 is regarded as a section of a plane reflector, and the incident ray P is calculated according to the law of optical reflection₀38 of primary reflected light ray P₁40; primary reflected light ray P₁The slope of 40 is: k is a radical of_P1＝tan(π/2+2tan^-1(k₁) Functions are: y-tan (pi/2 +2 tan)^-1(k₁))(x-x₁)+y₁,x∈(-∞,x₁)；

Step 11, segment L₁36 is regarded as the section of a plane reflector, and the incident ray T is calculated according to the law of optical reflection₀39 primary reflected ray T₁41; primary reflected light ray T₁The slope of 41 is: k is a radical of_T1＝tan(π/2+2tan^-1(k₁) Functions are: y-tan (pi/2 +2 tan)^-1(k₁))(x-x₁-l₁cos(tan^-1k₁))+k₁l₁cos(tan^-1(k₁))++y₁,x∈(-∞,x₁+cos(tan^-1k₁))；

SteP12, calculating the primary reflected ray P₁40 and the section curve S_DCross point (x) of₂,y₂)42；

Step 13, calculating the primary reflected ray T₁41 and the cross-sectional curve S_DCross point (x) of₃,y₃)43；

Step 14, passing Point (x)₂,y₂)42 make a primary reflected light ray P₁40 in the cross-sectional curve S_DUpper secondary reflected light ray P₂44；

If the secondary reflector is a flat mirror, the secondary reflected light ray P₂The slope of 44 is: k is a radical of_P1＝tan(π-tan^-1(k₁) Functions are: y-tan (pi-tan)^-1(k₁))×(x-x₂)+y₂，x∈(-∞，x₂)；

If the secondary reflector is a spherical convex mirror, the secondary reflected light P₂The slope of 44 is: k is a radical of_P2＝tan(tan^-1k_P1-2θ₁) The function is: y is tan (tan)^-1k_P1-2θ₁)(x-x₂)+y₂,x∈(-∞，x₂) Wherein theta₁＝tan^-1|(k_m1-k_P1)/(1+k_m1k_P1)|，

If the secondary reflector is a spherical concave mirror, the secondary reflected light ray P₂The slope of 44 is: k is a radical of_P2＝tan(tan^-1k_P1-2θ₁) The function is: y is tan (tan)^-1k_P1-2θ₁)(x-x₂)+y₂，x∈(-∞，x₂) Wherein theta₁＝tan^-1|(k_m1-k_P1)/(1+k_m1k_P1)|，

Step15, passing Point (x)₃,y₃)43 make a primary reflected ray T₁41 in the cross-sectional curve S_DUpper secondary reflected ray T₂45；

If the secondary reflector is a plane mirror, the secondary reflected light ray T₂The slope of 45 is: k is a radical of_T1＝tan(π-tan^-1(k₁) Functions are: y-tan (pi-tan)^-1(k₁))×(x-x₃)+y₃,x∈(-∞,x₃)；

If the secondary reflector is a spherical convex mirror, the secondary reflected light ray T₂The slope of 45 is: k is a radical of_T2＝tan(tan^-1k_T1-2θ₂) The function is: y is tan (tan)^-1k_T1-2θ₂)(x-x₃)+y₃,x∈(-∞,x₃) Wherein theta₂＝tan^-1|(k_m2-k_T1)/(1+k_m2k_T1)|，

If the secondary reflector is a spherical concave mirror, the secondary reflected light ray T₂The slope of 45 is: k is a radical of_T2＝tan(tan^-1k_T1-2θ₂) The function is: y is tan (tan)^-1k_T1-2θ₂)(x-x₃)+y₃，x∈(-∞，x₃) Wherein theta₂＝tan^-1|(k_m2-k_T1)/(1+k_m2k_T1)|，

Step16, calculating the secondary reflected light P₂44 and line segment L_d33, the intersection point; if the light ray P is reflected twice₂44 and line segment L_d33 intersect at the right place and not with the edge contour line 34 of the outer shell of the thermal storage container 17, the next Step17 is performed; otherwise change the line segment L₁Slope k of 36₁And length l₁And repeating all the steps from Step7 to Step15 until the secondary reflected light ray P₂44 and line segment L_d33 intersect at suitable locations and do not intersect with the edge contour lines 34 of the housing of the thermal storage container 17;

step17, calculating the secondary reflected ray T₂45 and line segment L_d33, the intersection point; if the light ray T is reflected twice₂45 and line segment L_d33 intersect at the right place and not with the edge contour line 34 of the outer shell of the thermal storage container 17, the next Step18 is performed; otherwise change the line segment L₁Slope k of 36₁And length l₁And repeating all the steps from Step7 to Step16 until the secondary reflected light ray T₂45 and line segment L_d33 intersect at suitable locations and do not intersect with the edge contour lines 34 of the housing of the thermal storage container 17;

step18, selecting line segment L₁36 as a starting point and making a slope of k₂Length of l₂Line segment L of₂46; repeating the steps from Step7 to Step17 until the incident ray is divided by the line segment L₂46 and the profile curve S of the secondary mirror_DThe secondary reflected light obtained by reflection is all related to the line segment L_d33 at the appropriate location;

step19, repeating the steps from Step7 to Step18 until the maximum distance between the section line segment 11 of the primary reflector 1 and the center connecting line 8 is equal to the radius F of the primary reflector 1;

step 20, adjusting the slope k of all the sectional line segments 11 of the primary reflector 1₁And length l₁Repeating the steps from Step6 to Step19 until all the secondary reflected rays are aligned with the line segment L_d33 intersect at a suitable location.

Preferably, the number of primary mirror assemblies 3 is 6.

The invention has the beneficial effects that:

the present invention can be applied to a distributed solar thermal storage apparatus (distributed solar thermal storage apparatus, patent No. 2018102799515) as shown in fig. 3, and functions to collect sunlight into the thermal storage container 17 and heat the thermal storage medium in the thermal storage container 17 to 200 degrees centigrade or higher;

as shown in the attached drawings 1 and 2, the disc type solar condenser consists of a primary reflector 1 and a secondary reflector 2; a plurality of small lenses 5 cut by plane mirrors are arranged on the primary reflector 1 and can reflect incident light 12 to the secondary reflector 2; the secondary reflector 2 is formed by cutting a single reflector, and can reflect the incident light reflected by the primary reflector 1 into the heat storage container 17 again.

The design concept of the disc type solar condenser is as follows:

(1) the characteristic that the application scene has low requirement on the condensation precision is fully utilized, the primary reflector 1 is manufactured by splicing small plane mirrors, and a parabolic reflector which can be manufactured only by a mechanical die and a grinding process is replaced;

(2) the small lens holder 4 of the primary reflector 1 is preferably made of plastic;

(3) the secondary reflector 2 is used for transferring the light collecting area 7 from the focal position of the primary reflector 1 to the vicinity of the central position of the primary reflector 1, so that the moment of the whole condenser relative to the pitching rotating shaft is reduced;

(4) the secondary reflector 2 is preferably made of a plane mirror among the plane mirror, the spherical convex mirror and the spherical concave mirror.

Thanks to the design concept, the cost of the whole condenser is reduced to be within 200 yuan, which is far lower than that of the traditional parabolic reflector, and the economic benefit is very obvious.

However, the light collection requirements of the dish solar concentrator vary greatly from conventional parabolic concentrators. The conventional parabolic condenser has the following condensing requirements: point focusing, "higher concentration ratio" is better; however, the light-gathering requirements of the dish-type solar light-gathering lens mainly include the following points:

(1) the surface focusing is performed as long as the sunlight is gathered in a specified range, and no requirement is made on the light gathering ratio;

(2) the housing of the heat storage container 17 cannot be made to block sunlight;

(3) in order to reduce the reflection loss of the sunlight on the surface of the glass, the sunlight is close to the vertical incidence as much as possible;

(4) the projection size of the secondary reflector 2 is minimized on the premise that all incident light rays are guaranteed to be concentrated to the light collecting area 7.

Since the light-gathering requirement changes, when the section of the primary reflector 1 is designed, the optimal light-gathering effect cannot be obtained by adopting the method of dividing line segments on the parabola, and a brand new design method must be adopted. The brand new design method and the distinctive light condensation effect brought by the brand new design method are the biggest differences between the invention and the traditional disc type condenser.

Drawings

Fig. 1 is an external view of the present invention. The labels in the figure are: 1-a primary reflector; 2-a secondary reflector; 3-a primary mirror assembly; 4-a small lens support; 5-small lens; 13-a support bar; 14-an outer ring; 15-inner ring.

Fig. 2 is a cross-sectional view of the present invention. The labels in the figure are: 1-a primary reflector; 2-a secondary reflector; 6-secondary mirror reference plane; 7-a light collecting area; 8-center line; 9-a light collection plane; 11-section line segment; 12-incident light; 13-a support bar; 14-an outer ring; 15-inner ring; 16-primary mirror reference plane.

Fig. 3 is a complete machine diagram of the distributed solar heat storage device. The labels in the figure are: 1-a primary reflector; 2-a secondary reflector; 7-a light collecting area; 10-light collecting circle; 13-secondary mirror support bar; 17-a thermal storage vessel; 18-a thermal storage container support arm; 19-pitch pan tilt; 20-a pitch rotation motor; 21-tripod head supporting feet; 22-a roller assembly; 23-horizontal rotation track; 24-horizontal rotation motor.

Fig. 4 is a sectional view of the thermal storage container. The labels in the figure are: 25-insulating glass windows; 26-a light-heat converter; 27-a thermal storage container tank; 28-a housing; 29-a bearing; 30-a rotary joint; 31-an oil bin; 32-heat insulating material.

FIG. 5 is a diagram of one embodiment of a design method. The labels in the figure are: 8-center line L_m(ii) a 11-section line segment; 33-line segment L_d(ii) a 34-section of shell of heat accumulation container; 35-line segment L_D(ii) a 36-line segment L₁(ii) a 37-line segment L₁Starting point (x) of (c)₁,y₁) (ii) a 38-incident ray P₀(ii) a 39-incident ray T₀(ii) a 40-primary reflected light ray P₁(ii) a 41-primary reflected ray T₁(ii) a 42-intersection (x)₂,y₂) (ii) a 43-intersection (x)₃,y₃) (ii) a 44-secondary reflected light ray P₂(ii) a 45-secondary reflected ray T₂(ii) a 46-line segment L₂(ii) a 50-section curve S_D。

FIG. 6 is a diagram of an embodiment of a design method. The labels in the figure are: 8-center line L_m(ii) a 11-section line segment; 33-line segment L_d(ii) a 34-section of shell of heat accumulation container; 35-line segment L_D(ii) a 36-line segment L₁(ii) a 37-line segment L₁Starting point (x) of (c)₁,y₁) (ii) a 38-incident ray P₀(ii) a 39-incident ray T₀(ii) a 40-primary reflected light ray P₁(ii) a 41-primary reflected ray T₁(ii) a 42-intersection (x)₂,y₂) (ii) a 43-intersection (x)₃,y₃) (ii) a 44-secondary reflected light ray P₂(ii) a 45-secondary reflected ray T₂(ii) a 46-line segment L₂(ii) a 47-sphere center of secondary reflector; 48-normal m₁(ii) a 49-normal m₂(ii) a 51-section curve S_D；

FIG. 7 is a diagram of a third embodiment of the design method. The labels in the figure are: 8-center line L_m(ii) a 11-section line segment; 33-line segment L_d(ii) a 34-section of shell of heat accumulation container; 35-line segment L_D(ii) a 36-line segment L₁(ii) a 37-line segment L₁Starting point (x) of (c)₁,y₁) (ii) a 38-incident ray P₀(ii) a 39-incident ray T₀(ii) a 40-primary reflected light ray P₁(ii) a 41-primary reflected ray T₁(ii) a 42-intersection (x)₂,y₂) (ii) a 43-intersection (x)₃,y₃) (ii) a 44-secondary reflected light ray P₂(ii) a 45-secondary reflected ray T₂(ii) a 46-line segment L₂(ii) a 47-sphere center of secondary reflector; 48-normal m₁(ii) a 49-normal m₂(ii) a 52-section curve S_D。

Fig. 8 is a three-dimensional view one of the primary mirrors. The labels in the figure are: 8-center line L_m。

Fig. 9 is a three-dimensional view two of the primary mirror. The labels in the figure are: 5-small lens.

Detailed Description

The present invention will be described in detail below with reference to the accompanying fig. 1 to 9.

The specific application example of the invention is a brand new product: distributed solar thermal storage apparatus (patent name: distributed solar thermal storage apparatus, patent No. 2018204520155), as shown in fig. 1-4:

as shown in fig. 3, the distributed solar heat storage device mainly comprises a disc-type solar condenser, a heat storage container 17, a heat storage container support arm 18, a pitching rotation pan-tilt 19, a pitching rotation motor 20, pan-tilt support feet 21, a roller assembly 22, a horizontal rotation track 23 and a horizontal rotation motor 24;

as shown in attached figures 1 and 2, the disc type solar energy condenser consists of a primary reflector 1, a secondary reflector 2 and a secondary reflector support rod 13; the primary reflector 1 is formed by connecting 6 primary reflector assemblies 3 to form a sunny surface facing incident rays; the primary reflector assembly 3 comprises a small lens 5 and a small lens support 4, and is formed by connecting a plurality of small lenses 5 and one small lens support 4; the material of which the small lens support 4 is made is flame retardant PC; the small lens 5 is cut by a common plane mirror and is arranged on the sunny side of the small lens support 4 to form a reflecting surface of the primary reflector 1, and the incident light 12 can be reflected to the secondary reflector 2;

the primary reflector 1 is a hollow circular ring structure, and the edges of the circular ring structure are an outer ring 14 and an inner ring 15; a small lens 5 is laid between the outer ring 14 and the inner ring 15; the heat storage container 17 is placed inside the inner ring 15; the plane of the inner ring 15 is a primary mirror reference plane 16;

the secondary reflector 2 is formed by cutting a piece of complete glass, and the edge contour is circular; the plane where the edge profile of the secondary reflector 2 is located is a secondary reflector reference plane 6; the secondary mirror reference surface 6 is parallel to the primary mirror reference surface 16;

connecting the circle center of the inner ring 15 with the circle center of the edge profile of the secondary reflector 2 to obtain a straight line which is a central connecting line 8; the central connecting line 8 is vertical to the secondary mirror reference surface 6;

the reflecting surface of the secondary reflector 2 is opposite to the reflecting surface of the primary reflector 1, and the incident light 12 reflected by the primary reflector 1 can be reflected into the light collecting area 7;

the light collecting region 7 refers to the surface of the heat storage container 17 on the insulating glass window 25 closest to the secondary reflector 2, and if the incident light 12 can be reflected by the primary reflector 1 and the secondary reflector 2 to the light collecting region 7, it can enter the interior of the heat storage container 17 without fail;

as shown in fig. 5-7, the profile of the small lens support 4 comprises a plurality of profile line segments 11; the section line segments 11 are sequentially connected end to form a continuous broken line; the greater the distance between the midpoint of the cross-sectional line segment 11 and the center connecting line 8, the greater the slope of the cross-sectional line segment 11; the length and the slope of the section line segment 11 can ensure that the incident light 12 is reflected into the light collecting area 7 by the primary reflector 1 and the secondary reflector 2 and is not blocked by the shell of the heat storage container 17;

as shown in fig. 3, the primary mirror 1 is fixed to the heat storage container 17 by a coupling, and the secondary mirror 2 is connected to the heat storage container 17 by a secondary mirror support 13;

as shown in fig. 4, the heat storage container 17 is composed of a heat insulating glass window 25, a photothermal converter 26, a heat storage container tank 27, a housing 28, a rotary joint 30 and a bearing 29; the photothermal converter 26 is installed on the heat storage container tank 27, the photothermal converter and the heat storage container tank form a closed oil bin 31, and heat conduction oil is contained in the oil bin 31; the insulating glass window 25 is mounted on the photothermal converter 26, and the surface facing the incident light is the light collecting region 7; the incident light 12 collected by the disc-type solar condenser is irradiated into the photothermal converter 26 through the heat-insulating glass window 25; a relatively large space is formed between the heat storage container tank 27 and the casing 28, and a heat insulating material 32 is installed in the space;

as shown in fig. 3, the thermal storage container 17 is connected to the thermal storage container support arm 18 via a bearing 29, and the thermal storage container support arm 18 is fixed to the tilt/tilt head 19; the disc type solar energy collecting lens and the heat storage container 17 as a whole have the freedom degree of pitching rotation on the pitching rotation holder 19, and can realize pitching rotation under the action of the pitching rotation motor 20 and the speed reduction transmission mechanism;

the pitching rotating cradle head 19 is connected to a roller assembly 22 through a supporting foot 21, and the roller assembly 22 can horizontally rotate on a horizontal rotating track 23; the horizontal rotation rail 23 is provided with an internal gear which is meshed with an external gear of the horizontal rotation motor 24; the disc type solar energy condenser, the heat storage container 17, the heat storage container supporting arm 18, the pitching rotation holder 19, the supporting foot 21, the roller assembly 22 and other equipment as a whole have horizontal rotation freedom, and can be driven by the horizontal rotation motor 24 to horizontally rotate on the horizontal rotation track 23.

The work flow of the product is as follows:

a nine-axis acceleration gyroscope angle sensor is arranged on the heat storage container 17 and can measure the azimuth angle of the disc type solar condenser;

the singlechip control system calculates the azimuth angle of the sun according to the local longitude and latitude, date and time;

the single chip microcomputer control system drives the pitching rotating motor 20 and the horizontal rotating motor 24 according to the difference value between the azimuth angle of the disc type solar condenser and the azimuth angle of the sun, and the difference value is adjusted to be within an error allowable range;

the disc-type solar collecting lens collects sunlight into the photo-thermal converter 26 to heat the photo-thermal converter 26, and the photo-thermal converter 26 heats heat conduction oil in the oil bin 31;

the heat conducting oil in the oil 31 can realize long-time heat preservation and heat storage under the action of the heat preservation material 32;

under the action of the oil pump, the heat conducting oil in the oil bin 31 can be pumped out from the rotary joint 30, and then hot water, steam and the like are generated through the heat exchanger.

The design method of the primary reflector 1 mainly comprises six steps: (1) as shown in fig. 5, SolidWorks is selected as a three-dimensional design tool, and a sketch function of the SolidWorks is utilized to make a section view of the primary reflector 1, especially a section line 11; (2) as shown in fig. 8, the sectional view of the primary reflecting mirror 1 is rotated by one turn with the central connecting line 8 of the primary reflecting mirror 1 and the secondary reflecting mirror 2 as an axis to generate a perspective view of the primary reflecting mirror 1; (3) as shown in fig. 9, the mounting position of the small mirror 5 is made on the perspective view of the primary mirror 1; (4) selecting optical simulation software LightTools to perform optical simulation on the whole collecting lens including the primary reflector 1 and the secondary reflector 2, and verifying whether the light paths of the primary reflected light and the secondary reflected light meet the design requirements or not; (5) making the stereogram of the condenser into a real object; (6) and carrying out condensation test on the real object of the condenser by using a laser. The structure of the secondary reflector 2 can be a plane mirror, a spherical convex mirror or a spherical concave mirror. The step (1) is slightly different according to different structures of the secondary reflecting mirror 2, and will be described by dividing into 3 embodiments.

Example 1

The secondary reflecting mirror 2 of the present embodiment is a plane mirror, and the step (1) is composed of the following steps:

step1, selecting design parameters of a condenser according to actual application scenes and requirements of customers:

f: radius F of the primary mirror 1;

r: when the secondary reflector 2 is a spherical mirror, the spherical radius of the secondary reflector 2 is larger;

h: the distance between the primary mirror reference surface 16 and the secondary mirror reference surface 6;

h: the distance between the light collection area 7 and the primary mirror reference plane 16;

d: radius of the edge profile of the secondary mirror 2;

d: the radius of the edge profile of the light collecting area 7;

step 2, drawing a cross-sectional outline 34 of the outer shell of the heat storage container 17 on a sketch of SolidWorks;

step 3, drawing a line L on the sketch of SolidWorks_d33 denotes a light-collecting region 7; line segment L_DThe function of 33 is: h, x belongs to (D-D, D + D), and the coordinates of the middle point are as follows: (D, h);

step 4, drawing a line L on the sketch of SolidWorks_D35 represents the projection of the profile of the secondary mirror 2 in the X-axis direction; line segment L_DThe function of 35 is: h, x ∈ (0,2D), and the midpoint coordinate is: (D, H);

step 5, passing line section L_D35 as a function S of the profile of the quadratic mirror_D50; function of the curve S_D50 is as follows: h, x ∈ (0, 2D);

step6, passing line section L_d33 and line segment L_DThe midpoint of 35 is taken as a central connecting line 8; the function of the center connecting line 8 is: x is D;

step7, selecting point (x)₁,y₁)37, the value range is: x is the number of₁≥2D，y₁0; passing point (x)₁,y₁)37 as a slope k₁Length of l₁Line segment L of₁36, the line segment representing the cross section of the small lens 5; line segment L₁The function of 36 is: k is₁(x-x₁)+y₁,x∈(x₁,x₁+l₁cos(tan^-1(k₁)))；

Step 8, passing line section L₁Starting point of 36 (x)₁,y₁)37 as incident light P₀38; incident light ray P₀The function of 38 is: x ═ x₁；

Step 9, passing line section L₁36 as incident ray T₀39; incident ray T₀The function of 39 is: x ═ x₁+l₁cos(tan^-1(k₁))；

Step 10, segment L₁36 is regarded as a section of a plane reflector, and the incident ray P is calculated according to the law of optical reflection₀38 of primary reflected light ray P₁40; primary reflected light ray P₁The slope of 40 is: k is a radical of_P1＝tan(π/2+2tan^-1(k₁) Functions are: y-tan (pi/2 +2 tan)^-1(k₁))(x-x₁)+y₁，x∈(-∞，x₁)；

Step 11, segment L₁36 is regarded as the section of a plane reflector, and the incident ray T is calculated according to the law of optical reflection₀39 primary reflected ray T₁41; primary reflected light ray T₁The slope of 41 is: k is a radical of_T1＝tan(π/2+2tan^-1(k₁) Functions are: y-tan (pi/2 +2 tan)^-1(k₁))(x-x₁-l₁cos(tan^-1k₁))+k₁l₁cos(tan^-1(k₁))++y₁,x∈(-∞，x₁+cos(tan^-1k₁))；

Step 12, calculating the primary reflected light P₁40 and the section curve S_D50 (x)₂,y₂)42；

Step 13, calculating the primary reflected ray T₁41 and the cross-sectional curve S_D50 (x)₃,y₃)43；

Step 14, passing Point (x)₂,y₂)42 make a primary reflected light ray P₁40 in the cross-sectional curve S_DSecondary reflected light ray P at 50₂44; secondary reflected light P₂The slope of 44 is: k is a radical of_P1＝tan(π-tan^-1(k₁) Functions are: y-tan (pi-tan)^-1(k₁))×(x-x₂)+y₂,x∈(-∞,x₂)；

Step15, passing Point (x)₃,y₃)43 make a primary reflected ray T₁41 in the cross-sectional curve S_DSecondary reflected ray T at 50₂45, a first step of; secondary reflected light ray T₂The slope of 45 is: k is a radical of_T1＝tan(π-tan^-1(k₁) Functions are: y-tan (pi-tan)^-1(k₁))×(x-x₃)+y₃,x∈(-∞,x₃)；

Step16, calculating the secondary reflected light P₂44 and line segment L_d33, the intersection point; if the light ray P is reflected twice₂44 and line segment L_d33 intersect at the right place and not with the edge contour line 34 of the outer shell of the thermal storage container 17, the next Step17 is performed; otherwiseChanging the line segment L₁Slope k of 36₁And length l₁And repeating all the steps from Step7 to Step15 until the secondary reflected light ray P₂44 and line segment L_d33 intersect at suitable locations and do not intersect with the edge contour lines 34 of the housing of the thermal storage container 17;

step17, calculating the secondary reflected ray T₂45 and line segment L_d33, the intersection point; if the light ray T is reflected twice₂45 and line segment L_d33 intersect at the right place and not with the edge contour line 34 of the outer shell of the thermal storage container 17, the next Step18 is performed; otherwise change the line segment L₁Slope k of 36₁And length l₁And repeating all the steps from Step7 to Step16 until the secondary reflected light ray T₂45 and line segment L_d33 intersect at suitable locations and do not intersect with the edge contour lines 34 of the housing of the thermal storage container 17;

step18, select line segment l₁36 as a starting point and making a slope of k₂Length of l₂Line segment L of₂46; repeating the steps from Step7 to Step17 until the incident ray is divided by the line segment L₂46 and the profile curve S of the secondary mirror_DThe secondary reflected light rays obtained by 50 reflections are all matched with the line segment L_d33 at the appropriate location;

step19, repeating the steps from Step7 to Step18 until the maximum distance between the section line segment 11 of the primary reflector 1 and the center connecting line 8 is equal to the radius F of the primary reflector 1;

step 20, adjusting the slope k of all the sectional line segments 11 of the primary reflector 1₁And length l₁Repeating the steps from Step6 to Step19 until all the secondary reflected rays are aligned with the line segment L_d33 intersect at a suitable location.

The step (6) comprises the following steps:

(6-1) adjusting the angle and direction of the laser so that the beam emitted by the laser is parallel to the incident light ray P₀36 and strikes on the small lens 5 of the primary mirror 1;

(6-2) if the light beam emitted from the laser passes through the primary reflecting mirror 1 and the secondary reflecting mirrorAfter reflection by the mirror 2, falls on the line segment L_d30, the position of the laser is changed so that the beam of light emitted by the laser is parallel to the incident light ray P₀36 and hit on another small lens 5 of the primary reflector 1 and repeat the above test steps; if not, the line segment L_d30, the step of utilizing SolidWorks to make a three-dimensional drawing of the disc-type solar condenser is executed again.

Example 2

The secondary reflecting mirror 2 of the present embodiment is a spherical convex mirror, and the step (1) is composed of the following steps:

step1, selecting design parameters of a condenser according to actual application scenes and requirements of customers:

f: radius F of the primary mirror 1;

r: when the secondary reflector 2 is a spherical mirror, the spherical radius of the secondary reflector 2 is larger;

h: the distance between the primary mirror reference surface 16 and the secondary mirror reference surface 6;

h: the distance between the light collection area 7 and the primary mirror reference plane 16;

d: radius of the edge profile of the secondary mirror 2;

d: the radius of the edge profile of the light collecting area 7;

step 2, drawing a cross-sectional outline 34 of the outer shell of the heat storage container 17 on a sketch of SolidWorks;

step 3, drawing a line L on the sketch of SolidWorks_D33 denotes a light-collecting region 7; line segment L_dThe function of 33 is: h, x belongs to (D-D, D + D), and the coordinates of the middle point are as follows: (D, h);

step 4, drawing a line L on the sketch of SolidWorks_D35 represents the projection of the profile of the secondary mirror 2 in the X-axis direction; line segment L_DThe function of 35 is: h, x ∈ (0,2D), and the midpoint coordinate is: (D, H);

step 5, passing line section L_D35 as a function S of the profile of the quadratic mirror_D51; function of the curve S_D51 is:x∈(0,2D)；

step6, passing line section L_d33 and line segment L_DThe midpoint of 35 is taken as a central connecting line 8; the function of the center connecting line 8 is: x is D;

step7, selecting point (x)₁,y₁)37, the value range is: x is the number of₁≥2D，y₁0; passing point (x)₁,y₁)37 as a slope k₁Length of l₁Line segment L of₁36, the line segment representing the cross section of the small lens 5; line segment L₁The function of 36 is: k is₁(x-x₁)+y₁，x∈(x₁，x₁+l₁cos(tan^-1(k₁)))；

Step 8, passing line section L₁Starting point of 36 (x)₁,y₁)37 as incident light P₀38; incident light ray P₀The function of 38 is: x ═ x₁；

Step 9, passing line section L₁36 as incident ray T₀39; incident ray T₀The function of 39 is: x ═ x₁+l₁cos(tan^-1(k₁))；

Step 10, segment L₁36 is regarded as a section of a plane reflector, and the incident ray P is calculated according to the law of optical reflection₀38 of primary reflected light ray P₁40; primary reflected light ray P₁The slope of 40 is: k is a radical of_P1＝tan(π/2+2tan^-1(k₁) Functions are: y-tan (pi/2 +2 tan)^-1(k₁))(x-x₁)+y₁,x∈(-∞,x₁)；

Step 11, segment L₁36 is regarded as the section of a plane reflector, and the incident ray T is calculated according to the law of optical reflection₀39 primary reflected ray T₁41; primary reflected light ray T₁The slope of 41 is: k is a radical of_T1＝tan(π/2+2tan^-1(k₁) Functions are: y-tan (pi/2 +2 tan)^-1(k₁))(x-x₁-l₁cos(tan^-1k₁))+k₁l₁cos(tan^-1(k₁))++y₁,x∈(-∞,x₁+cos(tan^-1k₁))；

Step 12, calculating the primary reflected light P₁40 and the section curve S_D51 intersection (x)₂,y₂)42；

Step 13, calculating the primary reflected ray T₁41 and the cross-sectional curve S_D51 intersection (x)₃,y₃)43；

Step 14, passing Point (x)₂,y₂)42 make a primary reflected light ray P₁40 in the cross-sectional curve S_DSecondary reflected light ray P on 51₂44; secondary reflected light P₂(44) The slope of (d) is: k is a radical of_P2＝tan(tan^-1k_P1-2θ₁) The function is: y is tan (tan)^-1k_P1-2θ₁)(x-x₂)+y₂,x∈(-∞,x₂) Wherein theta₁＝tan^-1|(k_m1-k_P1)/(1+k_m1k_P1)|，Step15, passing Point (x)₃,y₃)43 make a primary reflected ray T₁41 in the cross-sectional curve S_DSecondary reflected ray T on 51₂45, a first step of; secondary reflected light ray T₂(45) The slope of (d) is: k is a radical of_T2＝tan(tan^-1k_T1-2θ₂) The function is: y is tan (tan)^-1k_T1-2θ₂)(x-x₃)+y₃,x∈(-∞,x₃) Wherein theta₂＝tan^-1|(k_m2-k_T1)/(1+k_m2k_T1)|，Step16, calculating the secondary reflected light P₂44 and line segment L_d33, the intersection point; if the light ray P is reflected twice₂44 and line segment L_d33 intersect at the right place and not with the edge contour line 34 of the outer shell of the thermal storage container 17, the next Step17 is performed; otherwise change the line segment L₁Slope k of 36₁And length l₁And repeating all the steps from Step7 to Step15 until the secondary reflected light ray P₂44 and line segment L_d33 intersect at suitable locations and do not intersect with the edge contour lines 34 of the housing of the thermal storage container 17;

step17, calculating the secondary reflected ray T₂45 and line segment L_d33, the intersection point; if the light ray T is reflected twice₂45 and line segment L_d33 intersect at the right place and not with the edge contour line 34 of the outer shell of the thermal storage container 17, the next Step18 is performed; otherwise change the line segment L₁Slope k of 36₁And length l₁And repeating all the steps from Step7 to Step16 until the secondary reflected light ray T₂45 and line segment L_d33 intersect at suitable locations and do not intersect with the edge contour lines 34 of the housing of the thermal storage container 17;

step18, selecting line segment L₁36 as a starting point and making a slope of k₂Length of l₂Line segment L of₂46; repeating the steps from Step7 to Step17 until the incident ray is divided by the line segment L₂46 and the profile curve S of the secondary mirror_DThe secondary reflected light obtained by reflection is all related to the line segment L_d33 at the appropriate location;

step19, repeating the steps from Step7 to Step18 until the maximum distance between the section line segment 11 of the primary reflector 1 and the center connecting line 8 is equal to the radius F of the primary reflector 1;

step 20, adjusting the slope k of all the sectional line segments 11 of the primary reflector 1₁And length l₁Repeating the steps from Step6 to Step19 until all the secondary reflected rays are aligned with the line segment L_d33 intersect at a suitable location.

The step (6) comprises the following steps:

(6-1) adjusting the angle and direction of the laser so that the beam emitted by the laser is parallel to the incident light ray P₀36 and strikes on the small lens 5 of the primary mirror 1;

(6-2) if the light beam emitted from the laser falls on the primary mirror 1 and the secondary mirror 2 after being reflectedLine segment L_d30, the position of the laser is changed so that the beam of light emitted by the laser is parallel to the incident light ray P₀36 and hit on another small lens 5 of the primary reflector 1 and repeat the above test steps; if not, the line segment L_d30, the step of utilizing SolidWorks to make a three-dimensional drawing of the disc-type solar condenser is executed again.

Example 3

The secondary reflecting mirror 2 of the present embodiment is a spherical concave mirror, and the step (1) is composed of the following steps:

step1, selecting design parameters of a condenser according to actual application scenes and requirements of customers:

f: radius F of the primary mirror 1;

r: when the secondary reflector 2 is a spherical mirror, the spherical radius of the secondary reflector 2 is larger;

h: the distance between the primary mirror reference surface 16 and the secondary mirror reference surface 6;

h: the distance between the light collection area 7 and the primary mirror reference plane 16;

d: radius of the edge profile of the secondary mirror 2;

d: the radius of the edge profile of the light collecting area 7;

step 2, drawing a cross-sectional outline 34 of the outer shell of the heat storage container 17 on a sketch of SolidWorks;

step 3, drawing a line L on the sketch of SolidWorks_d33 denotes a light-collecting region 7; line segment L_dThe function of 33 is: h, x belongs to (D-D, D + D), and the coordinates of the middle point are as follows: (D, h);

step 4, drawing a line L on the sketch of SolidWorks_D35 represents the projection of the profile of the secondary mirror 2 in the X-axis direction; line segment L_DThe function of 35 is: h, x ∈ (0,2D), and the midpoint coordinate is: (D, H);

step 5, passing line section L_D35 as a function S of the profile of the quadratic mirror_D52; function of the curve S_D52 is: :x∈(0,2D)；

step6, passing line section L_d33 and line segment L_DThe midpoint of 35 is taken as a central connecting line 8; the function of the center connecting line 8 is: x is D;

step7, selecting point (x)₁,y₁)37, the value range is: x is the number of₁≥2D，y₁0; passing point (x)₁,y₁)37 as a slope k₁Length of l₁Line segment L of₁36, the line segment representing the cross section of the small lens 5; line segment L₁The function of 36 is: k is₁(x-x₁)+y₁,x∈(x₁，x₁+l₁cos(tan^-1(k₁)))；

Step 8, passing line section L₁Starting point of 36 (x)₁,y₁)37 as incident light P₀38; incident light ray P₀The function of 38 is: x ═ x₁；

Step 9, passing line section L₁36 as incident ray T₀39; incident ray T₀The function of 39 is: x ═ x₁+l₁cos(tan^-1(k₁))；

Step 10, segment L₁36 is regarded as a section of a plane reflector, and the incident ray P is calculated according to the law of optical reflection₀38 of primary reflected light ray P₁40; primary reflected light ray P₁The slope of 40 is: k is a radical of_P1＝tan(π/2+2tan^-1(k₁) Functions are: y-tan (pi/2 +2 tan)^-1(k₁))(x-x₁)+y₁,x∈(-∞,x₁)；

Step 11, segment L₁36 is regarded as the section of a plane reflector, and the incident ray T is calculated according to the law of optical reflection₀39 primary reflected ray T₁41; primary reflected light ray T₁The slope of 41 is: k is a radical of_T1＝tan(π/2+2tan^-1(k₁) Functions are: y-tan (pi/2 +2 tan)^-1(k₁))(x-x₁-l₁cos(tan^-1k₁))+k₁l₁cos(tan^-1(k₁))++y₁，x∈(-∞，x₁+cos(tan^-1k₁))；

Step 12, calculating the primary reflected light P₁40 and the section curve S_D52 (x)₂,y₂)42；

Step 13, calculating the primary reflected ray T₁41 and the cross-sectional curve S_D52 (x)₃,y₃)43；

Step 14, passing Point (x)₂,y₂)42 make a primary reflected light ray P₁40 in the cross-sectional curve S_DSecondary reflected light ray P at 52₂44; secondary reflected light P₂(44) The slope of (d) is: k is a radical of_P2＝tan(tan^-1k_P1-2θ₁) The function is: y is tan (tan)^-1k_P1-2θ₁)(x-x₂)+y₂,x∈(-∞,x₂) Wherein theta₁＝tan^-1|(k_m1-k_P1)/(1+k_m1k_P1)|，Step15, passing Point (x)₃,y₃)43 make a primary reflected ray T₁41 in the cross-sectional curve S_DSecondary reflected ray T at 52₂45, a first step of; secondary reflected light ray T₂(45) The slope of (d) is: k is a radical of_T2＝tan(tan^-1k_T1-2θ₂) The function is: y is tan (tan)^-1k_T1-2θ₂)(x-x₃)+y₃,x∈(-∞,x₃) Wherein theta₂＝tan^-1|(k_m2-k_T1)/(1+k_m2k_T1)|，Step16, calculating the secondary reflected light P₂44 and line segment L_d33, the intersection point; if the light ray P is reflected twice₂44 and line segment L_d33 intersect at the right place and not with the edge contour line 34 of the outer shell of the thermal storage container 17, the next Step17 is performed; otherwise change the line segment L₁Slope k of 36₁And length l₁And repeating all the steps from Step7 to Step15 until the secondary reflected light ray P₂44 and line segment L_d33 intersect at suitable locations and do not intersect with the edge contour lines 34 of the housing of the thermal storage container 17;

step17, calculating the secondary reflected ray T₂45 and line segment L_d33, the intersection point; if the light ray T is reflected twice₂45 and line segment L_d33 intersect at the right place and not with the edge contour line 34 of the outer shell of the thermal storage container 17, the next Step18 is performed; otherwise change the line segment L₁Slope k of 36₁And length l₁And repeating all the steps from Step7 to Step16 until the secondary reflected light ray T₂45 and line segment L_d33 intersect at suitable locations and do not intersect with the edge contour lines 34 of the housing of the thermal storage container 17;

step18, selecting line segment L₁36 as a starting point and making a slope of k₂Length of l₂Line segment L of₂46; repeating the steps from Step7 to Step17 until the incident ray is divided by the line segment L₂46 and the profile curve S of the secondary mirror_DThe secondary reflected light obtained by reflection is all related to the line segment L_d33 at the appropriate location;

step19, repeating the steps from Step7 to Step18 until the maximum distance between the section line segment 11 of the primary reflector 1 and the center connecting line 8 is equal to the radius F of the primary reflector 1;

step 20, adjusting the slope k of all the sectional line segments 11 of the primary reflector 1₁And length l₁Repeating the steps from Step6 to Step19 until all the secondary reflected rays are aligned with the line segment L_d33 intersect at a suitable location.

The step (6) comprises the following steps:

(6-1) adjusting the angle and direction of the laser so that the beam emitted by the laser is parallel to the incident light ray P₀36 and strikes on the small lens 5 of the primary mirror 1;

(6-2) if the light beam emitted by the laser falls on the line segment L after being reflected by the primary reflector 1 and the secondary reflector 2_d30, the position of the laser is changed so that the beam of light emitted by the laser is parallel to the incident light ray P₀36 and hit on another small lens 5 of the primary reflector 1 and repeat the above test steps; if not, the line segment L_d30, the step of utilizing SolidWorks to make a three-dimensional drawing of the disc-type solar condenser is executed again.