WO2014029349A1

WO2014029349A1 - Lens unit array condenser

Info

Publication number: WO2014029349A1
Application number: PCT/CN2013/082069
Authority: WO
Inventors: 杨永顺
Original assignee: Yang Yongshun
Priority date: 2012-08-24
Filing date: 2013-08-22
Publication date: 2014-02-27
Also published as: CN102798969A

Abstract

A lens unit array condenser, comprising: a substrate (3) having a planar bottom surface and a condensing focal point (O) thereabove; a support piece array disposed on the upper surface of the substrate; and a lens unit (1) connected with the support surface of each support piece (2) forming the support piece array. The lens unit is a rectangular plane, and is disposed facing the condensing focal point; the incident light perpendicular to the substrate is reflected from the geometrical center of each lens unit, and the reflected light is condensed at the condensing focal point. The lens unit array condenser has simple manufacturing process, low cost and good condensing effect.

Description

Lens unit array concentrating mirror

The present disclosure relates to the field of solar energy utilization technologies, and in particular, to a lens unit array concentrating mirror. Background technique

Solar energy is a clean and renewable energy source. Therefore, people are paying more and more attention to the use of solar energy. Various devices using solar energy have been gradually developed. Among them, heat preparation using solar energy for heating, such as solar water heaters, hot air machines, etc. Great progress has also been made.

A hot air machine, also known as a Stirling engine or an external combustion engine, is an externally fired closed-loop reciprocating piston type heat engine. The medium that transfers energy in a hot air machine (usually a high-pressure gas) is called a working medium, and is filled with a certain volume of working fluid in one, two, four or more closed cylinders. One end of the cylinder is a hot chamber and the other end is a cold chamber. The working fluid is compressed in a low temperature cold chamber, and then flows into a high temperature hot chamber to rapidly heat and expand to perform work.

The advantage of the hot air machine is that the power and efficiency are not affected by the altitude, which is very suitable for high altitude use. Since the heat engine avoids the problem of the shocking work of the conventional internal combustion engine, low noise, low pollution, and low running cost are achieved. As long as a certain temperature difference is reached between the hot chamber and the cold chamber of the hot air machine, the hot air machine can perform the work. The hot air machine can burn various flammable gases or liquid fuels to heat the hot chamber, but it is more efficient to use solar energy for heating at high altitude and sunny places.

The use of solar energy to heat the hot chamber is preferably by placing the hot chamber of the hot air machine at the focus of the concentrating mirror and concentrating the sunlight to the focus to heat the hot chamber. For concentrating mirrors, parabolic concentrators have a good concentrating effect that converge parallel rays at one point. However, when the heat engine reaches a certain power, the rotating paraboloid of the parabolic concentrator (the surface obtained by rotating the parabola along its axis of symmetry, the cross section of which is a circle) is relatively large. This large-area parabolic concentrating mirror has a complicated manufacturing process and high cost. It costs at least 500 yuan per square meter, and even has a good workmanship of about 10,000 yuan. Second, the focus will deviate from the original when it is inflated and contracted. The focus, which affects the concentrating effect.

Faced with the above-mentioned problems of large-area parabolic concentrating mirrors, people began to explore the use of small-area lens units to form a paraboloid of a large-area parabolic concentrating mirror, for example, on a substrate that is generally a paraboloid of revolution. The small-area plane lens of the isosceles trapezoid is similar to the large-area rotating paraboloid. The trapezoid is chosen to adapt to the cross-sectional area of the paraboloid of revolution or the radius of the cross-section circle, and to increase the efficiency of the concentrating mirror. Reflective area. However, this type of concentrating mirror also has a problem that the processing cost of the lens unit is high, the pasting process is complicated, the condensing precision is poor, and the rotating paraboloid shape is difficult to process.

In addition to the heat engine, other solar energy utilization equipment that requires solar heating also requires a concentrating mirror including a flat lens unit. Summary of the invention

In view of the problems existing in the prior art, an object of the present disclosure is to provide a concentrating mirror capable of manufacturing a simple process, low cost, and good concentrating effect, so as to solve the technical problem that the concentrating mirror of the prior art is not cost-effective.

To achieve the above object, the technical solution of the present disclosure is as follows:

A lens unit array concentrating mirror comprising: a substrate having a flat bottom surface, a concentrating focus above the substrate; an array of support members disposed on an upper surface of the substrate; and each support member constituting the array of support members a lens unit to which the support surface is connected, the lens unit is disposed facing the concentrating focus, the lens unit is a rectangular plane, and the reflected light of the incident light perpendicular to the substrate is at a geometric center point of each of the lens units Light is concentrated on the focus of the light.

The beneficial effects of the present disclosure are that the lens unit array concentrating mirror of the present disclosure has the advantages of low manufacturing cost, simple process, and good condensing performance. The lens unit array concentrating mirror of the present disclosure can reduce the manufacturing cost to less than 300 yuan per square meter, which is much lower than the cost of the prior art; in addition, since the substrate of the lens unit array concentrating mirror of the present disclosure is a planar substrate, it is convenient Processing, also facilitates setting or integrally forming a support array on the substrate; the lens unit array concentrating mirror of the present disclosure, the geometric center point of each lens unit is concentrated on the concentrating focus, and the lens unit is small due to the small lens unit area The upper points have similar concentrating properties, so the concentrating performance of the entire lens unit array concentrating mirror is good. DRAWINGS

1 is a schematic view of a lens unit array concentrating mirror of a first embodiment of the present disclosure.

2 is a schematic cross-sectional view showing a diagonal position of a lens unit array condensing mirror according to a first embodiment of the present disclosure.

Figure 3 is a schematic diagram of the concentrating of the lens unit.

Fig. 4 is a schematic view showing the lens unit of the lens unit array condensing mirror of the first embodiment of the present invention attached to the support member.

FIG. 5 is a schematic view of a support member of a lens unit array concentrating mirror according to a first embodiment of the present disclosure.

6 is a schematic view of a lens unit array concentrating mirror of a second embodiment of the present disclosure.

7 is a schematic diagram of a lens unit of a lens unit array concentrating mirror attached to a support member according to a second embodiment of the present disclosure; Figure.

8 is a schematic view of a support member of a lens unit array concentrating mirror of a second embodiment of the present disclosure. detailed description

Exemplary embodiments embodying the features and advantages of the present disclosure will be described in detail in the following description. It should be understood that the present disclosure is capable of various modifications in the various embodiments, and This disclosure.

The lens unit array concentrating mirror of the preferred embodiment of the present disclosure will be specifically described below.

The lens unit array concentrating mirror of the present disclosure can be used for a hot air machine or for other solar energy utilization equipment that requires solar energy heating, such as a high power solar water heater.

As shown in FIG. 1, a lens unit array concentrating mirror of an embodiment of the present disclosure includes a lens unit 1, a support member 2, and a substrate 3. In this embodiment, the number of rows and the number of columns of the lens unit 1 are 16, but not limited thereto.

As shown in FIG. 2, the bottom surface 30 of the substrate 3 is a flat surface, so the substrate 3 is a planar substrate. As shown in FIG. 2, there is a concentrating focus 0, a concentrating focus 0 and a substrate directly above the geometric center point Q of the substrate. The distance between the center points Q can be determined by the area of the concentrator that is actually required. The larger the area of the concentrating mirror, the larger the distance between the concentrating focus 0 and the geometric center point Q of the substrate. The support member 2 or the lens unit 1 which is relatively close to the geometric center point Q of the substrate is an inner layer, and the support member 2 or the lens unit 1 which is relatively far from the geometric center point Q of the substrate is an outer layer, for example, the innermost lens unit 1 is four. However, in the present embodiment, the outermost lens unit is four (lens unit 1 in four angular positions).

As shown in FIG. 2, the upper surface of the substrate 3 is formed with an array of supports. The array of supports includes a plurality of rows and columns of support members 2. For example, the number of rows and the number of columns of the support array are the same, but not limited thereto. The number of rows and the number of columns may be different. The upper surface of each support member 2 supports a lens unit 1; in the present specification, the surface of the support member 2 connected to the lens unit 1 is referred to as a support surface, and since the support surface is, for example, a flat surface, It may be referred to as a support plane, and the geometric center point P of the support plane of each support member 2 is, for example, at the same height, or on the same plane perpendicular to the line connecting the geometric center point Q of the substrate and the focus point 0, and the same line. The geometric center point P of the support plane of each support member 2 is collinear and the distance (row spacing) of two adjacent geometric center points P is equal, and the geometric center point P of the support plane of each support member 2 on the same column is also The distances (column spacing) of the two collinear lines and adjacent geometric center points P are equal, and the line spacing is equal to the column spacing.

The geometric center points of the respective support members 2 are, for example, at the same height, such that the lowest point of the mounted lens unit 1 is not higher than the highest point of the lens unit 1 of the inner layer adjacent to the lens unit 1. Thus, the height of the support member 2 is not too high, which is advantageous for the production of the mold and reduces the cost of the condensing mirror. The advantage that the lowest point of the mounted lens unit 1 is not higher than the highest point of the lens unit 1 of the adjacent inner layer is that the height difference between adjacent lens units 1 can be given Fixing the lens unit on the struts 2 leaves a suitable operating space. The distance between the adjacent two lens units 1 is also kept at a distance of 2-5 mm.

Of course, it is also possible that the height of the geometric center point of the support member 2 of the opposite outer layer is higher than the height of the geometric center point of the support member 2 of the inner layer.

The lens unit 1 is disposed facing the concentrating focus 0, and the lens unit 1 is a rectangular plane, for example, a square plane, and the square length of the lens unit 1 may be between 100 mm and 500 mm, for example, 100 mm, 15 Omm, 200 mm, 300 mm or 500 mm. .

As shown in FIG. 3, the incident light a of the lens unit 1 parallel to the line d of the geometric center point Q of the substrate and the line d of the concentrating focus 0 is reflected by the lens unit 1 after the reflected light b at the geometric center point P of each lens unit 1 is reflected. Converging at the concentrating focus 0, FIG. 3 can also be regarded as a graph obtained by the plane lens unit 1 determined by three points of 0, P, and Q. The solid line N is the normal of the lens unit 1, and the broken line e is parallel to the method. Line N, dashed line d is on the line connecting the geometric center point Q of the substrate and the focus point 0, and the broken line c is perpendicular to the line d.

Similarly, Figure 3 also shows how to determine the set angle of each lens unit 1. The lens unit 1 as a plane is necessarily perpendicular to the normal of each position on the lens unit 1, and must also be perpendicular to the normal (or normal vector) N of the lens unit 1 at its geometric center point P, then the normal is determined. N, the setting angle of the lens unit 1 can be determined. The incident light a corresponds to a ray whose source point is the geometric center point P of the lens unit 1 and extends directly upward (that is, a direction parallel to the line connecting the geometric center point Q of the substrate and the focus point of the concentrating focus 0), and the reflected light b is equivalent. The source point is then the geometric center point P of the lens unit 1 and extends through another concentrating focus 0, which is coplanar with the normal N at the geometric center point P of the lens unit 1, and the normal N bisects this The angle between the two rays. Therefore, by determining the above two rays, the normal line N at the geometric center point P of the lens unit 1 can be determined by the method of finding the angle bisector, thereby determining the setting angle of each lens unit 1.

At the same time, the setting angle of the lens unit 1 can also be determined by determining the acute angle between the lens unit 1 and the bottom surface 30 of the substrate 3. First, the lens unit 1 needs to be perpendicular to the geometric center point P of the lens unit 1 to collect light. The focal plane 0 and the geometric center point of the substrate (that is, the projection point Q of the focused focal point 0 on the bottom surface 30 of the substrate 3) are determined by the distance from the geometric center point P of the lens unit 1 to the bottom surface 30 of the substrate 3. h, the distance of the concentrating focus 0 from the bottom surface 30 of the substrate 3 is m, and the distance from the geometric center point P of the lens unit 1 to the broken line d (that is, the distance between the two points P and R) is n, due to the normal N and The acute angle b is equal to the acute angle, and the acute angle between the lens unit 1 and the bottom surface 30 of the substrate 3 is ct, and the acute angle between the solid line b and the broken line c is equal to 90 degrees minus twice the ct, and the inverse trigonometric function is operated. Available:

In the lens unit array concentrating mirror of the present disclosure, the concentrating focus O may not be directly above the geometric center point of the substrate 3. At this time, the incident light is still perpendicular to the substrate 3, but is not parallel to the geometric center point Q and the concentrating focus of the substrate. 0, at this time, the incident light perpendicular to the substrate 3 is concentrated at the geometric center point P of each lens unit 1 at the focus point 0 of the lens unit 1, and is still used to find the incident light and the reflected light. The angle bisector method determines the normal N at the geometric center point P of the lens unit 1, and thereby determines the set angle of each lens unit 1. The lens unit 1 and the bottom surface 30 of the substrate 3 are:

Here, h is still the distance from the geometric center point P of the lens unit 1 from the bottom surface 30 of the substrate 3, m is still the distance of the concentrating focus 0 from the bottom surface 30 of the substrate 3, and n is still the geometric center point P of the lens unit 1 The distance between the focus of the concentrating focus 0 and the projection point of the concentrating focus 0 on the bottom surface 30, where the lens unit 1 is still perpendicular to the geometric center point P, the concentrating focus 0 and the concentrating focus 1 of the lens unit 1 The plane defined by the projection point on the bottom surface 30 of the substrate 3. If the concentrating focus 0 is not directly above any point on the substrate 3, but directly above a certain point on the plane of the bottom surface 30 of the substrate 3 outside the substrate 3, that is, the projection of the concentrating focus 0 on the substrate 3. The point is not in the bottom surface 30, but in the plane in which the bottom surface 30 is located, the projection point of the concentrating focus 0 in the plane of the bottom surface 30 is the projection point of the concentrating focus 0 at the bottom surface 30 to calculate the above angle.

In the lens unit array concentrating mirror of the present disclosure, the number of rows or columns of the support member 2 of the support array (the number of rows and the number of columns are usually equal or not large) ranges from 16 to 160, due to the support member 2 and the lens The units 1 are in one-to-one correspondence, so the number of rows or columns of the lens unit 1 is also in the same range, and the number of rows or columns can be divisible by, for example, 16, 32, 64, 128 or 160, etc. The advantage that the number of rows or columns can be divisible by four is that, for example, a 16-row 16-column lens unit 1 array concentrating mirror requires only four sets of the same mold, that is, four substrate units 31, 32, 33, 34 are prepared. And each of the substrate units 31, 32, 33, 34 may be integrally formed with an array of 8 rows and 8 columns of supports, and the substrate 3 includes four substrate units 31, 32, 33, 34. At this time, the lens unit array concentrating mirror may further include a frame holder such as a "field" shaped frame holder, and each of the substrate units 31, 32, 33, 34 is supported in one of the "mouth" shaped frame units of the frame holder.

In the lens unit array concentrating mirror of the embodiment of the present disclosure, the substrate unit 31, 32, 33, 34 and the support member array thereon may be integrally formed, for example, integrally injection molding, injection molding, or may be first formed into the substrate 3, and then A support member array is disposed on the substrate 3, and the support member 2 can be fixed on the substrate by screws, and the substrate 3 can be metal or polymer. Material.

In the lens unit array concentrating mirror of the embodiment of the present disclosure, the shape of the support member may be a cylindrical shape or a regular square prism shape or the like. As shown in FIG. 1, FIG. 4 and FIG. 5, the lens unit array concentrating mirror of the first embodiment of the present disclosure has a support member 2 having a square prism shape, and the support member 2 includes a support plane 26, a chamfer 27 and a support body 28. The chamfer 27 is a chamfer between the support plane 26 and the support body 28. The lens unit 1 can be attached to the support surface by gluing, or it can be connected to the support surface by screws, snaps or snaps.

As shown in FIG. 2, FIG. 7 and FIG. 8, the lens unit array concentrating mirror of the second embodiment of the present disclosure has a support member 2 having a cylindrical shape, and the support member 2 includes a support plane 21, a chamfer 22 and a support body 23, The corner 22 is a chamfer between the support plane 26 and the cylindrical surface of the support body 28. The area of the lens unit 1 is larger than the area of the support plane 21, which facilitates the attachment or attachment of the lens unit 1.

The lens unit array concentrating mirror of the embodiment of the present disclosure has the advantages of low manufacturing cost, simple process, and good condensing performance. The lens unit array concentrating mirror of the present disclosure can reduce the total manufacturing cost to less than 300 yuan per square meter, which is greatly reduced compared with the cost of the prior art; in addition, since the substrate 3 of the lens unit array concentrating mirror of the present disclosure is a planar substrate, Therefore, it is convenient to process, and it is also convenient to arrange or integrally form the support array on the substrate 3; the lens unit array concentrating mirror of the present disclosure, the geometric center point P of each lens unit 1 is concentrated on the concentrating focus 0, due to the lens unit 1 The area is small, so that each point on the lens unit 1 has an approximate condensing property, so that the concentrating performance of the concentrating mirror of the entire lens unit array is good.

It will be appreciated by those skilled in the art that the changes and modifications made within the scope and spirit of the disclosure disclosed in the appended claims are within the scope of the appended claims.

Claims

Rights request

1. A lens unit array condenser, wherein the lens unit array condenser includes:

The bottom surface is a flat substrate, and there is a focusing focus above the substrate;

An array of supports provided on the upper surface of the substrate;

A lens unit connected to the support surface of each support member constituting the support member array. The lens unit is arranged facing the focusing focus. The lens unit is a rectangular plane. Incident light perpendicular to the substrate is reflected on each The reflected light from the geometric center point of the lens unit is focused on the focusing focus.

2. The lens unit array condenser of claim 1, wherein the geometric center point of each lens unit is on the same plane parallel to the bottom surface, and the number of rows and columns of the support array are equal, so The focusing focus is located directly above the geometric center point of the substrate.

3. The lens unit array condenser of claim 1, wherein the lens unit is a square, the number of rows and columns of the support array is divisible by two, and the support surface of the support is a plane. .

4. The lens unit array condenser lens according to claim 1, wherein the shape of the support member is cylindrical.

5. The lens unit array condenser lens according to claim 1, wherein the shape of the support member is a regular square prism.

6. The lens unit array condenser of claim 5, wherein each support member includes a quadrangular prism body, a chamfer and the support surface, and the area of the lens unit is larger than the area of the support surface.

7. The lens unit array condenser of claim 3, wherein the square side length of the lens unit is 100mm-500mm, and the number of rows is 16-160.

8. The lens unit array condenser of claim 7, wherein the square side length of the lens unit is 100mm, 150mm, 200mm, 300mm or 500mm, and the number of rows is 16, 32, 64, 128 or 160.

9. The lens unit array condenser of claim 3, wherein the lens unit array condenser further includes a frame bracket, the substrate includes a plurality of substrate units, and the upper surface of each substrate unit has a number of rows and a number of columns. There is an array of 8 supports, and each substrate unit is supported in one of the frame units of the frame bracket.

10. The lens unit array condenser lens according to claim 9, wherein the substrate unit and the support array on the substrate unit are integrally formed.