Polishing method of transparent cover plate in flat plate collector and flat plate collector

Abstract

The application discloses a polishing method for a transparent cover plate in a flat-plate collector and the flat-plate collector. The polishing method for the transparent cover plate in the flat-plate collector is characterized by the following steps: after the frame is bent to form a rectangular frame structure and the two end portions of the frame are connected together, the curvature x of the corner portion on the frame is measured; if x is greater than a, the corner portion of the transparent cover plate is polished; wherein the distance between the transparent cover plate and the outer side edge of the frame is a. The corner portion of the transparent cover plate is polished accurately to improve the overall processing quality of the flat-plate collector.

Description

Technical Field

[0001] This invention belongs to the field of solar collector technology, and particularly relates to a method for polishing a transparent cover plate in a flat plate solar collector and the flat plate solar collector itself. Background Technology

[0002] Currently, water heaters are common household appliances, categorized into electric, gas, and solar water heaters. Solar water heaters utilize solar energy to heat water, making them more environmentally friendly and widely adopted. To utilize solar energy for heating, solar water heaters typically incorporate flat-plate collectors, which ultimately heat the water within the heater.

[0003] Conventional flat-plate solar collectors typically consist of a frame, an absorber core, a transparent cover, and a base plate. The frame, as the main supporting component, is usually assembled from individual edges. To facilitate manufacturing, a one-piece frame structure has become increasingly popular. For example, Chinese Patent Publication No. CN 204460799 U discloses a frame for a solar flat-plate collector, formed by bending a single profile. Due to the limitations imposed by the bending process, the corners of the frame have a certain curvature, and the angles of the transparent cover also require corresponding grinding.

[0004] In existing technologies, grinding is typically done by workers based on accumulated experience, which results in inconsistent dimensions of the ground transparent cover plate, leading to a decrease in the overall quality of the flat-plate solar collector. Therefore, the technical problem this invention aims to solve is how to design a technique for precisely grinding the corners of the transparent cover plate to improve the overall processing quality of the flat-plate solar collector. Summary of the Invention

[0005] This invention provides a flat-plate solar collector and its assembly method, which enables precise grinding of the corners of the transparent cover plate to improve the overall processing quality of the flat-plate solar collector.

[0006] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution:

[0007] In one aspect, the present invention provides a method for polishing a transparent cover plate in a flat-plate solar collector, wherein the frame of the flat-plate solar collector is formed into a rectangular frame structure by bending, and the bent portion of the frame forms a corner. The method includes: bending the frame to form a rectangular frame structure, connecting the two ends of the frame together, and then measuring the radii x of the corner on the frame; if... Then the corners of the transparent cover are polished.

[0008] The distance between the transparent cover and the outer edge of the frame is 'a'.

[0009] By determining the curvature of the corner formed after the frame is bent, and combining this with the dimensions of the frame and the transparent cover, the grinding depth of the transparent cover's corners can be obtained. In this way, based on specific parameter values, the curvature of the corner formed after the frame is bent in the same batch, and the dimensions of the transparent cover in the same batch, the specific grinding depth requirements can be obtained. This allows on-site operators to use the obtained grinding reference for grinding, achieving precise grinding of the transparent cover's corners and improving the overall processing quality of the flat plate solar collector.

[0010] In one embodiment of this application, the corner grinding depth of the transparent cover is y=0.414x-1.414a.

[0011] In one embodiment of this application, if in At this time, there is no need to grind the corners of the transparent cover.

[0012] Another embodiment of the present invention also provides a flat-plate solar collector, comprising:

[0013] The border is bent to form a rectangular frame structure, the two ends of the border are connected together, and the bent part of the border forms a corner.

[0014] Transparent cover;

[0015] Heat absorption plate core;

[0016] Base plate;

[0017] The transparent cover is disposed on the upper part of the frame, and the edge of the transparent cover is located in the first mounting groove and the second mounting groove of the frame. The bottom plate is disposed on the lower part of the frame. An installation cavity is formed between the frame, the transparent cover, and the bottom plate, and the heat-absorbing plate core is disposed in the installation cavity.

[0018] In addition, the distance between the transparent cover and the outer edge of the frame is a, the distance between the transparent cover and the intersection of the tangents of the corresponding corner is b, and the radius of the corner is x.

[0019] exist hour, ;

[0020] exist hour, .

[0021] In one embodiment of this application, the flat-plate solar collector further includes:

[0022] A pressure strip, wherein the outer edge of the pressure strip is provided with a first flange, and the lower edge of the first flange is provided with a first snap-fit ​​part;

[0023] A covering component, wherein the outer edge of the covering component is provided with a second flange, and the lower edge of the second flange is provided with a second snap-fit ​​part;

[0024] The frame includes a covering component at each corner, a pressure strip between adjacent covering components, and the end of the pressure strip below the corresponding covering component. The covering component covers the corresponding corner. A first snap-fit ​​part and a second snap-fit ​​part are engaged with the snap-fit ​​part. A first mounting groove is formed between the pressure strip and the frame, and a second mounting groove is formed between the covering component and the frame. The first mounting groove is adjacent to and communicates with the second mounting groove. The first mounting groove is a strip structure, and the second mounting groove is a bent structure.

[0025] In one embodiment of this application, the upper surface of the frame is further provided with a positioning part, the lower surface of the pressure strip is further provided with a first positioning mating part, the first positioning mating part is located inside the first flange, and the lower surface of the covering component is further provided with a second positioning mating part, the second positioning mating part is located inside the second flange.

[0026] The first positioning mating part and the second positioning mating part are respectively attached to the inner side of the positioning part.

[0027] In one embodiment of this application, the two ends of the covering component are respectively provided with extension portions, the contour of the lower surface of the extension portion matches the contour of the upper surface of the pressure strip, and the end of the pressure strip is sandwiched between the extension portion and the frame.

[0028] In one embodiment of this application, a first support portion is provided on the upper part of the frame, and the first support portion extends laterally toward the inner side of the frame.

[0029] A second support portion is provided at the lower part of the frame, and the second support portion extends laterally toward the inner side of the frame;

[0030] The first mounting groove is formed between the pressure strip and the first supporting part, and the second mounting groove is formed between the covering part and the first supporting part.

[0031] In one embodiment of this application, the edge of the first support portion is provided with a downward flange, and a groove is formed between the downward flange and the frame; the frame assembly for the solar collector further includes a connecting member, the upper part of the connecting member is engaged in the groove, the lower part of the connecting member abuts against the second support portion, and the connecting member covers the mating portion formed at both ends of the frame.

[0032] In one embodiment of this application, a side-opening insertion groove is formed in the second bearing portion, and the edge of the base plate is inserted into the insertion groove. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of the frame assembly in one embodiment of the flat plate solar collector of this utility model;

[0035] Figure 2 for Figure 1 A partial cross-sectional view of the middle border component;

[0036] Figure 3 for Figure 2 A magnified view of a portion of region A in the middle;

[0037] Figure 4 for Figure 1 A cross-sectional view of the middle border;

[0038] Figure 5 for Figure 1 Schematic diagram of the structure of the intermediate pressure strip;

[0039] Figure 6 for Figure 1 One of the structural schematic diagrams of the middle covering component;

[0040] Figure 7 for Figure 1 Schematic diagram of the structure of the middle covering component (Part 2);

[0041] Figure 8 This is a schematic diagram of another embodiment of the flat-plate solar collector of this utility model;

[0042] Figure 9 for Figure 8 A schematic diagram of the partial structure of a corner area of ​​a medium-plate solar collector.

[0043] Explanation of reference numerals in the attached figures:

[0044] 1. Frame; 11. Corner; 12. Snap-fit ​​part; 13. Positioning part; 14. First bearing part; 15. Second bearing part; 16. Insertion groove; 17. Lower flange; 18. Mounting port; 2. Pressure strip; 21. First flange; 22. First snap-fit ​​part; 23. First positioning part; 3. Covering component; 31. Second flange; 32. Second snap-fit ​​part; 33. Second positioning part; 34. Extension part; 4. Connecting component; 5. Sealing ring. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0046] It should be noted that in the description of this utility model, the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," which indicate directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. These are merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0047] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0048] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0049] The following disclosure provides many different embodiments or examples for implementing various structures of this invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0050] Example 1, as Figures 1-7 As shown, one embodiment of this application provides a frame assembly for a solar collector, including: a frame 1, a pressure strip 2, and a covering component 3.

[0051] The frame 1 is bent to form a rectangular frame structure, and the two ends of the frame 1 are connected together. The bent portion of the frame 1 forms a corner 11, and the frame 1 is also provided with snap-fit ​​portions 12 around its perimeter. A certain amount of material is cut off from the frame 1 at the corresponding position to allow for bending at that position to form the corner 11.

[0052] The outer edge of the pressure strip 2 is provided with a first flange 21, and the lower edge of the first flange 21 is provided with a first snap-fit ​​part 22. The pressure strip 2 is generally elongated and is used to cooperate with the frame 1 to install the transparent cover plate of the flat plate solar collector.

[0053] The outer edge of the covering component 3 is provided with a second flange 31, and the lower edge of the second flange 31 is provided with a second snap-fit ​​part 32. The covering component 3 is installed on the frame 1 to cover and protect the gap formed at the bending part of the frame 1.

[0054] The corner portion 11 of the frame 1 is provided with a covering component 3, and a pressure strip 2 is provided between two adjacent covering components 3. The end of the pressure strip 2 is located below the corresponding end of the covering component 3, and the covering component 3 covers the corresponding corner portion 11. The first snap-fit ​​part 22 and the second snap-fit ​​part 32 are engaged with the snap-fit ​​part 12. A first mounting groove is formed between the pressure strip 2 and the frame 1, and a second mounting groove is formed between the covering component 3 and the frame 1. The first mounting groove is adjacent to and communicates with the second mounting groove. The first mounting groove is a strip structure, and the second mounting groove is a bent structure.

[0055] Specifically, in this embodiment, the frame 1 is formed by bending a single profile to create a one-piece frame 1, with the bent portion of the frame 1 forming a corner 11. Because the corner 11 is formed by bending, a seam will be created at the corresponding part of the profile during splicing. Furthermore, when forming the corner 11, a certain amount of material needs to be cut away at the corresponding location, which will also lead to a decrease in structural strength at the corner 11.

[0056] Therefore, a covering component 3 is provided at the corner 11 of the frame 1. On the one hand, the covering component 3 can cover the corner 11 and thus block the gap formed by the corner 11; on the other hand, the covering component 3 can partially wrap around the outside of the corner 11 through the second flange 31, so as to enhance the structural strength of the corner 11 and further improve the angle impact resistance of the frame 1.

[0057] In addition, the upper surface of the frame 1 is further covered by the pressure strip 2. On the one hand, the pressure strip 2 can cooperate with the frame 1 to install the transparent cover plate. On the other hand, the first flange 21 of the pressure strip 2 is arranged on the outside of the frame 1, which can improve the strength of the side wall. Furthermore, the outer surface of the pressure strip 2 can be smoother, so as to more effectively optimize the overall appearance.

[0058] The covering component 3 and the pressure strip 2 work together to effectively prevent the corners of the flat plate collector from being collided and deformed, thus improving assembly efficiency and aesthetics.

[0059] By adding a covering component 3 to the corner 11 of the frame 1, the covering component 3 is snapped onto the frame 1 to cover the corner 11 and thus conceal the gap formed by the corner 11, thereby improving the overall assembly quality of the flat plate solar collector. Furthermore, the snap-fit ​​method for assembling the covering component 3 and the pressure strip 2 onto the frame 1 facilitates rapid on-site assembly, reducing assembly difficulty and improving assembly efficiency. Simultaneously, the flange formed by the pressure strip 2 and the covering component 3 is located on the outer side of the frame 1, which further enhances the overall structural strength of the frame 1.

[0060] In some embodiments of this application, the upper surface of the frame 1 is further provided with a positioning part 13, the lower surface of the pressure strip 2 is further provided with a first positioning mating part 23, the first positioning mating part 23 is located inside the first flange 21, and the lower surface of the covering part 3 is further provided with a second positioning mating part 33, the second positioning mating part 33 is located inside the second flange 31.

[0061] The first positioning mating part 23 and the second positioning mating part 33 are respectively attached to the inner side of the positioning part 13.

[0062] Specifically, in order to improve the reliability of the mounting, a positioning part 13 is provided on the upper surface of the frame 1. When the pressure strip 2 is mounted, the first positioning mating part 23 formed on the lower surface of the pressure strip 2 will abut against the positioning part 13 to play a positioning role. After the first snap-fit ​​mating part 22 snaps into the snap-fit ​​part 12, the pressure strip 2 is firmly and reliably mounted onto the frame 1.

[0063] Similarly, when the cover component 3 is installed, the second positioning mating part 33 formed on the lower surface of the cover component 3 will abut against the positioning part 13 to play a positioning role, and after the second snap-fit ​​mating part 32 snaps into the snap-fit ​​part 12, the cover component 3 is securely and reliably installed onto the frame 1.

[0064] In some embodiments, in order to improve the assembly reliability of the pressure strip 2 and to effectively position and install the two ends of the pressure strip 2, an extension portion 34 can be provided at each end of the covering component 3. The contour of the lower surface of the extension portion 34 matches the contour of the upper surface of the pressure strip 2, and the end of the pressure strip 2 is sandwiched between the extension portion 34 and the frame 1.

[0065] Specifically, during assembly, the pressure strip 2 is first snapped onto the corresponding side of the frame 1. Then, the covering component 3 is snapped onto the corner 11 of the frame 1, and the covering component 3 is used to cover and limit the end of the adjacent pressure strip 2, so that the end of the pressure strip 2 is sandwiched between the rotating component and the frame 1. The extension 34 formed at the end of the covering component 3 can effectively overlap the end of the pressure strip 2 to cover and limit the end of the pressure strip 2.

[0066] In another embodiment of this application, a first support portion 14 is provided on the upper part of the frame 1, and the first support portion 14 extends laterally toward the inner side of the frame 1.

[0067] The first mounting groove (not marked) is formed between the pressure strip 2 and the first support part 14, and the second mounting groove (not marked) is formed between the covering part 3 and the first support part 14.

[0068] Specifically, during the assembly of the flat-plate solar collector, a transparent cover plate needs to be installed on the frame 1. The edge of the transparent cover plate installed on the frame 1 is limited and fixed at the top by the pressure strip 2 and the covering component 3. In this way, the edge of the transparent cover plate can be limited and fixed in the mounting groove.

[0069] In one embodiment, in order to improve the structural strength of the first bearing portion 14 to meet the requirements of bearing the transparent cover plate, a first reinforcing structure is provided on the surface of the first bearing portion 14 along the length direction. The first reinforcing structure is a rib or a groove.

[0070] Specifically, the surface of the first support portion 14 is provided with ribs or grooves, which gives the first support portion 14 higher structural strength to meet the installation requirements of the transparent cover.

[0071] In another embodiment, in order to meet the installation requirements of the flat plate collector base plate, a second support portion 15 is provided at the lower part of the frame 1, and the second support portion 15 extends laterally toward the inner side of the frame 1.

[0072] Specifically, the base plate of the flat-plate solar collector is installed and fixed to the bottom of the frame 1 and connected and fixed to the second support portion 15 provided at the bottom of the frame 1. The second support portion 15 is distributed around the bottom of the frame 1, thus enabling an effective and reliable connection with the four sides of the base plate.

[0073] To facilitate assembly, the second support portion 15 has a side-opening insertion groove 16.

[0074] Specifically, when the base plate is assembled onto the frame 1, the bottom edge can be inserted into the insertion slot 16 so that the base plate can achieve a better connection with the second bearing part 15, thereby improving the connection reliability and connection strength between the two.

[0075] Similarly, to enhance the structural strength of the second support portion 15, a second reinforcing structure is provided on the surface of the second support portion 15 along its length direction. The second reinforcing structure is a rib or a groove.

[0076] In another embodiment of this application, the edge of the first support portion 14 is provided with a downward flange 17, and a slot (not marked) is formed between the downward flange 17 and the frame 1; the frame assembly for the solar collector also includes a connecting member 4, the upper part of the connecting member 4 is engaged in the slot, the lower part of the connecting member 4 abuts against the second support portion 15, and the connecting member 4 covers the mating parts formed at both ends of the frame 1.

[0077] Specifically, since the frame 1 is manufactured into a one-piece frame structure by bending, the two ends of the frame 1 need to be fixedly connected. Therefore, a connecting component 4 is used to fix the two ends of the frame 1 together. During assembly, the upper end of the connecting component 4 is inserted into the slot, and then the lower end of the connecting component 4 abuts against the second support part 15. In this way, the connecting component 4 is snapped onto the frame 1 and positioned between the two ends of the frame 1 to connect them together.

[0078] Among them, the longitudinal section of the connecting component 4 is a U-shaped structure with a sideways inclination, which gives the connecting component 4 a certain elasticity. The connecting component 4 is clamped onto the frame 1 to ensure that the two ends of the frame 1 are reliably connected together.

[0079] In another embodiment, a mounting port 18 can be provided on the frame 1 to meet the installation requirements of the inlet and outlet liquid pipes. Furthermore, a sealing ring 5 can be provided on the mounting port 18 as needed. The sealing ring 5 can be fitted onto the inlet and outlet liquid pipes. While ensuring the sealing of the frame 1, the sealing ring 5, due to its elasticity, allows water vapor generated inside the flat plate solar collector to be discharged through the connection formed between the sealing ring 5 and the inlet and outlet liquid pipes when the internal air pressure is high.

[0080] Example 2, as Figure 8 As shown, one embodiment of this application also provides a flat-plate solar collector, comprising:

[0081] The frame assembly adopts the solar collector frame assembly described in Embodiment 1 above.

[0082] 6 transparent cover plates;

[0083] Heat absorber core (not shown);

[0084] Base plate (not shown);

[0085] The transparent cover plate 6 is disposed on the upper part of the frame 1 in the frame assembly, and the edge of the transparent cover plate 6 is located in the first mounting groove and the second mounting groove of the frame assembly. The bottom plate is disposed on the lower part of the frame 1. An installation cavity is formed between the frame assembly, the transparent cover plate and the bottom plate, and the heat-absorbing plate core is disposed in the installation cavity.

[0086] Specifically, in one embodiment of this application, the flat plate solar collector adopts the frame assembly in the first embodiment above. The transparent cover plate 6 and the bottom plate are assembled onto the frame assembly, and the heat absorption plate core is located between the transparent cover plate 6 and the bottom plate. The liquid inlet and outlet pipes on the heat absorption plate core extend through the mounting port on the frame 1 of the frame assembly to meet the requirements for connection with the flow path of external equipment.

[0087] Example 3, as Figures 8-9 As shown, this application also provides a grinding method for the transparent cover plate in a flat plate solar collector. Since the frame 1 is made of a single profile bent, the corner formed by the bend will have a certain curvature. In order to match the installation requirements of the corner on the frame 1, the corner of the transparent cover plate 6 needs to be ground according to the curvature of the corner.

[0088] The grinding method for the transparent cover plate in a flat-plate solar collector includes: bending the frame to form a rectangular frame structure, connecting the two ends of the frame together, and then measuring the radius x of the corner of the frame; if Then the corners of the transparent cover are polished.

[0089] The distance between the transparent cover and the outer edge of the frame is 'a'.

[0090] Specifically, for an aluminum profile frame with a short side of C and a long side of D, and a distance a between the transparent cover plate 6 and the outer edge of the frame 1, then the length of the maximum spacing b without grinding the transparent cover plate is... When the limiting distance b is greater than 0.414x, the transparent cover plate does not need to be polished, and the polishing depth of the transparent cover plate is 0. When the limiting distance b is less than 0.414x, the relationship between the bending radius x of the flat plate collector and the polishing depth y of the transparent cover plate can be derived as follows.

[0091]

[0092] For an aluminum profile frame with side C (short side) and side D (long side), the radius of the bend is x, and the distance between the glass and the frame is a. According to the side length relationships of an equilateral right triangle, the distance from the center of the bend to the vertex of the frame is... The distance from the glass vertex to the edge vertex is... ,therefore Figure 9 x1 is the distance minus the radius x of the curve, which is... .

[0093] If the glass does not require polishing, the polishing depth y=0. .

[0094] When glass needs to be polished Grinding depth y= ,at this time .

[0095] Based on the above formulas, the relationship between the heat exchange area S (i.e. the area of ​​the glass cover plate) of the bent flat plate solar collector and the bending curvature of the flat plate solar collector can be calculated. This area is equal to the area of ​​the unpolished glass cover plate minus the area of ​​the polished corner. .

[0096] By determining the curvature of the corner formed after the frame is bent, and combining this with the dimensions of the frame and the transparent cover, the grinding depth of the transparent cover's corners can be obtained. In this way, based on specific parameter values, the curvature of the corner formed after the frame is bent in the same batch, and the dimensions of the transparent cover in the same batch, the specific grinding depth requirements can be obtained. This allows on-site operators to use the obtained grinding reference for grinding, achieving precise grinding of the transparent cover's corners and improving the overall processing quality of the flat plate solar collector.

[0097] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0098] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions claimed by this utility model.

Claims

1. A method for polishing a transparent cover plate in a flat-plate solar collector, wherein the frame of the flat-plate solar collector is formed into a rectangular frame structure by bending, and the bent part of the frame forms a corner, characterized in that... include: Bend the border to form a rectangular frame structure, and connect the two ends of the border together. Measure the radius x of the corner of the border; if Then the corners of the transparent cover are polished. The distance between the transparent cover and the outer edge of the frame is 'a'. The grinding depth of the corner of the transparent cover is y=0.414x-1.414a.

2. The method for polishing the transparent cover plate in a flat-plate solar collector according to claim 1, characterized in that, If in At this time, there is no need to grind the corners of the transparent cover.

3. A flat-plate solar collector, characterized in that, include: The border is bent to form a rectangular frame structure, the two ends of the border are connected together, and the bent part of the border forms a corner. Transparent cover; Heat absorption plate core; Base plate; The transparent cover is disposed on the upper part of the frame, and the edge of the transparent cover is located in the first mounting groove and the second mounting groove of the frame. The bottom plate is disposed on the lower part of the frame. An installation cavity is formed between the frame, the transparent cover, and the bottom plate, and the heat-absorbing plate core is disposed in the installation cavity. In addition, the distance between the transparent cover and the outer edge of the frame is a, the distance between the transparent cover and the intersection of the tangents of the corresponding corner is b, and the radius of the corner is x. exist hour, ; exist hour, .

4. The flat-plate solar collector according to claim 3, characterized in that, The flat-plate solar collector also includes: A pressure strip, wherein the outer edge of the pressure strip is provided with a first flange, and the lower edge of the first flange is provided with a first snap-fit ​​part; A covering component has a second flange on its outer edge and a second snap-fit ​​part on its lower edge. The bent portion of the frame forms a corner, and snap-fit ​​parts are provided around the perimeter of the frame. Covering components are respectively provided on the corners of the frame, and a pressure strip is provided between adjacent covering components. The end of the pressure strip is located below the corresponding end of the covering component, and the covering component covers the corresponding corner. The first and second snap-fit ​​parts are engaged with the snap-fit ​​parts. A first mounting groove is formed between the pressure strip and the frame, and a second mounting groove is formed between the covering component and the frame. The first mounting groove is adjacent to and communicates with the second mounting groove. The first mounting groove is a strip structure, and the second mounting groove is a bent structure.

5. The flat-plate solar collector according to claim 4, characterized in that, The upper surface of the frame is also provided with a positioning part, the lower surface of the pressure strip is also provided with a first positioning mating part, the first positioning mating part is located inside the first flange, and the lower surface of the covering component is also provided with a second positioning mating part, the second positioning mating part is located inside the second flange. The first positioning mating part and the second positioning mating part are respectively attached to the inner side of the positioning part.

6. The flat-plate solar collector according to claim 4, characterized in that, The two ends of the covering component are respectively provided with extensions, the contour of the lower surface of the extension matches the contour of the upper surface of the pressure strip, and the end of the pressure strip is sandwiched between the extension and the frame.

7. The flat-plate solar collector according to claim 4, characterized in that, The upper part of the frame is provided with a first support part, which extends laterally toward the inside of the frame. A second support portion is provided at the lower part of the frame, and the second support portion extends laterally toward the inner side of the frame; The first mounting groove is formed between the pressure strip and the first supporting part, and the second mounting groove is formed between the covering part and the first supporting part.

8. The flat-plate solar collector according to claim 7, characterized in that, The first support portion has a downward-curved edge, and a groove is formed between the downward-curved edge and the frame; the frame assembly for the solar collector also includes a connecting member, the upper part of which is engaged in the groove, the lower part of which abuts against the second support portion, and the connecting member covers the mating area formed at both ends of the frame.

9. The flat-plate solar collector according to claim 7, characterized in that, The second bearing portion has a side-opening insertion groove, and the edge of the base plate is inserted into the insertion groove.

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