Photovoltaic heat collector

Abstract

The utility model discloses a photovoltaic heat collector. The photovoltaic heat collector comprises a photovoltaic laminated piece; the heat transfer plate is arranged on the lower surface of the photovoltaic laminated piece and is packaged with the photovoltaic laminated piece into a whole; the heat collection frame comprises a supporting back plate and a frame fixed on the periphery of the supporting back plate, the supporting back plate and the frame form a limiting space, the photovoltaic laminated piece and the heat transfer plate are arranged in the limiting space, a plurality of flow channels are formed between the supporting back plate and the heat transfer plate, and the frame is provided with connector pipes communicated with the flow channels; and the heat transfer plate and the heat collection frame form a heat exchange unit. According to the utility model, the photovoltaic laminated piece and the heat transfer plate are arranged in the heat collection frame, and the plurality of flow channels are formed between the heat collection frame and the heat transfer plate, so that the heat transfer plate and the heat collection frame form a heat exchange unit, heat generated in the power generation process of the photovoltaic laminated piece exchanges heat with liquid in the flow channels, the photovoltaic laminated piece is cooled, and the heat exchange efficiency is improved. The photoelectric efficiency of the photovoltaic laminated piece is improved, a frame of the photovoltaic module is omitted, and the product cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic power generation, in particular to a photovoltaic collector. Background Art

[0002] As a green new energy, solar energy has many advantages such as being inexhaustible, clean and environmentally friendly. With the advancement of science and technology, the use of solar energy has made great progress, the photoelectric conversion efficiency of photovoltaic modules has been continuously improved, and solar photovoltaic modules have increasingly replaced traditional petrochemical combustion energy and become a green energy with an increasing proportion.

[0003] Photovoltaic modules are mainly composed of frames and photovoltaic laminates fixed in the frames, where the photovoltaic laminates mainly include light cover plates, battery strings, insulating sheets, etc. In the process of photovoltaic modules converting solar radiation into electrical energy, a large amount of waste heat will be generated inside the battery string, which will increase the temperature of the photovoltaic modules and reduce the photoelectric efficiency.

[0004] At present, a collector is added behind the photovoltaic module to absorb the waste heat generated by the photovoltaic module during the power generation process. The collector and the photovoltaic module are fitted together as two independent devices without integrated optimization design. This is due to high cost, low waste heat utilization rate and low photovoltaic efficiency. Utility Model Content

[0005] In order to solve at least one technical problem of the prior art, the utility model provides a photovoltaic collector.

[0006] In order to achieve the above utility model object, the technical solution adopted by the utility model is: a photovoltaic collector, comprising: a photovoltaic laminate;

[0007] A heat transfer plate, disposed on the lower surface of the photovoltaic laminate and packaged as a whole with the photovoltaic laminate;

[0008] The heat collecting frame comprises a supporting back plate and a frame fixed around the supporting back plate, wherein the supporting back plate and the frame form a limiting space, the photovoltaic laminate and the heat transfer plate are arranged in the limiting space, a plurality of flow channels are formed between the supporting back plate and the heat transfer plate, and the frame is provided with an interface pipe connected to the flow channels, so that the heat transfer plate and the heat collecting frame form a heat exchange unit.

[0009] In some embodiments, the supporting back plate is provided with a plurality of flow channel grooves, and the heat transfer plate is laid on top of the flow channel grooves to form the flow channel with the flow channel grooves.

[0010] In some embodiments, the cross section of the flow channel is "U"-shaped or square.

[0011] In certain embodiments, the photovoltaic laminate and the heat transfer plate are bonded within the confined space.

[0012] In some embodiments, the support back plate is provided with a plurality of sealing grooves arranged parallel to the flow channel, the sealing grooves are filled with a second sealant, and the support back plate and the heat transfer plate are bonded by the second sealant.

[0013] In some embodiments, the plurality of flow channels are interconnected at the ends, and the interface pipe includes an inlet pipe and an outlet pipe, and the inlet pipe and the outlet pipe can be arranged at opposite ends of the heat collecting frame or at the same end of the heat collecting frame.

[0014] In certain embodiments, when the inlet pipe and the outlet pipe are arranged at the same end of the solar collector frame, an intermediate sealing groove is provided at the middle position of the supporting back plate, a plurality of flow channels are symmetrically distributed on both sides of the intermediate sealing groove, and the second sealant filled in the intermediate sealing groove separates the flow channels distributed on both sides of the intermediate sealing groove at the interface end, and the inlet pipe and the outlet pipe are respectively arranged on both sides of the intermediate sealing groove and are respectively connected to the flow channels located on both sides of the intermediate sealing groove.

[0015] In some embodiments, the heat collecting frame further includes at least two mounting portions fixed to two opposite sides of the bottom of the frame and extending in a direction away from the frame, and the mounting portions are provided with a plurality of mounting holes.

[0016] In some embodiments, the mounting portion includes a mounting plate arranged parallel to and below the supporting back plate and a supporting plate connecting the frame and the mounting plate, the mounting plate is provided with a plurality of mounting holes, and the height of the supporting plate is greater than the depth of the flow channel.

[0017] In some embodiments, the heat collecting frame and the heat transfer plate are both made of metal plates.

[0018] The beneficial effect of the utility model is that the photovoltaic laminate and the heat transfer plate are arranged in a heat collecting frame, and a plurality of flow channels are formed between the heat collecting frame and the heat transfer plate, so that the heat transfer plate and the heat collecting frame form a heat exchange unit. On the one hand, the heat generated in the power generation process of the photovoltaic laminate is used to heat the liquid in the flow channel, thereby providing hot water for residents; on the other hand, the liquid in the flow channel can take away the heat generated in the power generation process of the photovoltaic laminate, cool the photovoltaic laminate, and improve the photoelectric efficiency of the photovoltaic laminate; and the photovoltaic laminate and the heat transfer plate are integrated together through the heat collecting frame, thereby eliminating the frame of the photovoltaic module and reducing the cost of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1This is a schematic diagram of the front structure of a photovoltaic collector according to one embodiment of the utility model;

[0020] Figure 2 This is a schematic diagram of the back structure of a photovoltaic collector according to one embodiment of the utility model;

[0021] Figure 3 A cross-sectional view of a photovoltaic collector according to one embodiment of the utility model;

[0022] Figure 4 It is a schematic cross-sectional view of a heat collecting frame of a photovoltaic heat collector according to one embodiment of the utility model. DETAILED DESCRIPTION

[0023] In order to more clearly understand the above-mentioned purposes, features and advantages of the utility model, the utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. These drawings are all simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner. Therefore, they only show the structures related to the utility model. It should be noted that the embodiments in this application and the features in the embodiments can be combined with each other without conflict.

[0024] In the following description, many specific details are set forth to provide a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0025] Reference Figures 1 to 4 , a photovoltaic collector is provided, comprising a photovoltaic laminate 1, a heat transfer plate 2 arranged on the lower surface of the photovoltaic laminate 1 and packaged as a whole with the photovoltaic laminate 1, and a heat collecting frame 3 as a bearing body supporting the photovoltaic laminate 1 and the heat transfer plate 2, the heat collecting frame 3 comprising a supporting back plate 30 and a frame 31 fixed around the supporting back plate 30, the supporting back plate 30 and the frame 31 constitute a limited space, the photovoltaic laminate 1 and the heat transfer plate 2 are arranged in the limited space, a plurality of flow channels 4 are formed between the supporting back plate 30 and the heat transfer plate 2, and the frame 31 is provided with an interface pipe connected with the flow channel 4, so that the heat transfer plate 2 and the heat collecting frame 3 form a heat exchange unit, on the one hand, the heat generated in the photovoltaic laminate 1 during power generation is used to heat the liquid in the flow channel 4 to provide hot water for residents, on the other hand, the liquid in the flow channel 4 can take away the heat generated in the photovoltaic laminate 1 during power generation, cool the photovoltaic laminate 1, and improve the photoelectric efficiency of the photovoltaic laminate 1.

[0026] In some embodiments, the photovoltaic laminate 1 and the heat transfer plate 2 are bonded in the limited space of the heat collection frame 3. Specifically, the photovoltaic laminate 1 and the heat transfer plate 2 are bonded to the frame 31 by the first sealant 5.

[0027] In some embodiments, a plurality of sealing grooves 301 are provided on the support back plate 30 . The sealing grooves 301 are parallel to the flow channel 4 . The sealing grooves 301 are filled with a second sealant 6 . The heat transfer plate 2 is bonded to the upper surface of the support back plate 30 by the second sealant 6 .

[0028] In some embodiments, the support back plate 30 is provided with a plurality of flow channels 300, the cross section of the flow channels 300 is "U" shaped or square, and the flow channels 300 extend from one end to the other end of the support back plate 30. Preferably, the flow channels 300 extend along the long side direction of the support back plate 30. The cross section of the flow channels 300 is "U" shaped or square. The heat transfer plate 2 is laid above the flow channels 300 to form a flow channel 4 with the flow channels 300, and the plurality of flow channels 4 are interconnected at the ends.

[0029] In some embodiments, the interface pipe includes an inlet pipe 7 and an outlet pipe 8, which are respectively connected to the flow channel 4. The liquid first enters the photovoltaic collector from the inlet pipe 7, exchanges heat with the heat generated by the photovoltaic laminate 1 in the flow channel 4, and then flows out from the outlet pipe 8.

[0030] The inlet pipe 7 and the outlet pipe 8 can be arranged at two opposite ends of the heat collecting frame 3 , or can be arranged at the same end of the heat collecting frame 3 .

[0031] When the inlet pipe 7 and the outlet pipe 8 are arranged at the same end of the heat collecting frame 3, the supporting back plate 30 is provided with an intermediate sealing groove 302 at the middle position, and a plurality of flow channels 4 are symmetrically distributed on both sides of the intermediate sealing groove 302, and the second sealant 6 filled in the intermediate sealing groove 302 separates the flow channels 4 distributed on both sides of the intermediate sealing groove 302 at the interface end, so that the flow channels 4 distributed on both sides of the intermediate sealing groove 302 are connected to each other at the interface end away from the interface end, and are divided into two parts at the interface end. The inlet pipe 7 and the outlet pipe 8 are arranged at both ends of the intermediate sealing groove 302 and are respectively connected to the flow channels 4 separated at both ends of the intermediate sealing groove 302, and the inlet pipe 7, the flow channels 4 and the outlet pipe 8 generally form a "U" structure.

[0032] In some embodiments, the solar collector frame 3 also includes at least two mounting portions fixed on two opposite sides of the bottom of the frame 31 and extending away from the frame 31. The mounting portions are provided with a plurality of mounting holes 330. The photovoltaic collector is fixed to a fixed object such as a bracket, a wall or a roof by means of a pressing block or bolts passing through the mounting holes 330.

[0033] The mounting portion includes a mounting plate 33 arranged parallel to the lower side of the supporting back plate 30 and a supporting plate 32 connecting the frame 31 and the mounting plate 33, wherein the mounting plate 33 is provided with a plurality of mounting holes 330. The height of the supporting plate 32 is greater than the depth of the flow channel 4, so that the flow channel 4 is located above the mounting plate 33, thereby preventing the photovoltaic collector from being unable to be mounted on a fixed object due to the protrusion of the flow channel 4 from the mounting plate 33.

[0034] In some embodiments, the heat collecting frame 3 and the heat transfer plate 2 are both made of metal plates. Preferably, the heat transfer plate 2 is a steel plate, an aluminum plate or a copper plate with a thickness of 0.2 mm to 1 mm. The heat collecting frame 3 is made of a steel plate with a thickness of 0.5 mm to 2 mm.

[0035] As a common setting in the art, the photovoltaic laminate 1 includes a light cover, a battery string and an insulating sheet, and the battery string is encapsulated between the light cover and the insulating sheet by encapsulation glue. The light cover 110 is glass, or a transparent PET plate, or a fluororesin film. The insulating sheet is an insulating hard plastic sheet, such as a PET plate, and the thickness of the insulating sheet is 0.15 mm to 0.5 mm.

[0036] The heat transfer plate 2 is connected to the lower surface of the insulating sheet by packaging glue, and is packaged into a whole with the photovoltaic laminate 1 by a laminator.

[0037] In some embodiments, the photovoltaic collector further includes a plurality of split junction boxes 9, which are arranged in the lower surface of the collector frame 3, and the heat transfer plate 2 is provided with a plurality of conductive wire holes, through which the cables of the split junction boxes 9 are connected to the photovoltaic laminate.

[0038] In some embodiments, the photovoltaic collector also includes a support beam 10, which is disposed below the heat transfer plate 2, and both ends of the support beam 10 are fixedly connected to the frame 31. By setting the support beam 10, the stiffness and strength of the photovoltaic collector can be adapted to installation scenarios with different load performance requirements.

[0039] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to the above embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the above embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A photovoltaic collector, characterized in that: include: Photovoltaic laminates (1); A heat transfer plate (2) arranged on the lower surface of the photovoltaic laminate (1) and packaged integrally with the photovoltaic laminate (1); A heat collecting frame (3) comprises a supporting back plate (30) and a frame (31) fixed around the supporting back plate (30), wherein the supporting back plate (30) and the frame (31) form a limiting space, wherein the photovoltaic laminate (1) and the heat transfer plate (2) are arranged in the limiting space, wherein a plurality of flow channels (4) are formed between the supporting back plate (30) and the heat transfer plate (2), and the frame (31) is provided with an interface pipe connected to the flow channels (4), so that the heat transfer plate (2) and the heat collecting frame (3) form a heat exchange unit.

2. The photovoltaic collector according to claim 1, characterized in that: The supporting back plate (30) is provided with a plurality of flow channel grooves (300), and the heat transfer plate (2) is laid on top of the flow channel grooves (300) to form the flow channel (4) with the flow channel grooves (300).

3. The photovoltaic collector according to claim 2, characterized in that: The cross section of the flow channel groove (300) is "U"-shaped or square.

4. The photovoltaic collector according to claim 1, characterized in that: The photovoltaic laminate (1) and the heat transfer plate (2) are bonded in the limited space.

5. The photovoltaic collector according to claim 1, characterized in that: The supporting back plate (30) is provided with a plurality of sealing grooves (301), the sealing grooves (301) being parallel to the flow channel (4), the sealing grooves (301) being filled with a second sealing adhesive (6), and the supporting back plate (30) and the heat transfer plate (2) being bonded together by the second sealing adhesive (6).

6. The photovoltaic collector according to claim 5, characterized in that: The plurality of flow channels (4) are interconnected at the ends, and the interface pipe comprises an inlet pipe (7) and an outlet pipe (8). The inlet pipe (7) and the outlet pipe (8) may be arranged at two opposite ends of the heat collecting frame (3), or may be arranged at the same end of the heat collecting frame (3).

7. The photovoltaic collector according to claim 6, characterized in that: When the inlet pipe (7) and the outlet pipe (8) are arranged at the same end of the heat collecting frame (3), an intermediate sealing groove (302) is provided at the middle position of the supporting back plate (30), a plurality of flow channels (4) are symmetrically distributed on both sides of the intermediate sealing groove (302), and the second sealant (6) filled in the intermediate sealing groove (302) separates the flow channels (4) distributed on both sides of the intermediate sealing groove (302) at the interface end, and the inlet pipe (7) and the outlet pipe (8) are arranged on both sides of the intermediate sealing groove (302) and are respectively connected to the flow channels (4) located on both sides of the intermediate sealing groove (302).

8. The photovoltaic collector according to any one of claims 1 to 7, characterized in that: The heat collecting frame (3) further comprises at least two mounting portions fixed to two opposite sides of the bottom of the frame (31) and extending in a direction away from the frame (31), wherein the mounting portions are provided with a plurality of mounting holes (330).

9. The photovoltaic collector according to claim 8, characterized in that: The mounting portion comprises a mounting plate (33) arranged parallel to and below the supporting back plate (30) and a supporting plate (32) connecting the frame (31) and the mounting plate (33); the mounting plate (33) is provided with a plurality of mounting holes (330); and the height of the supporting plate (32) is greater than the depth of the flow channel (4).

10. The photovoltaic collector according to any one of claims 1 to 7, characterized in that: The heat collecting frame (3) and the heat transfer plate (2) are both made of metal plates.

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