Repairing and replacing type photovoltaic photo-thermal heat collector

Abstract

The invention provides a reparable and replaceable photovoltaic photo-thermal heat collector which enables a photovoltaic panel and a heat collector to be independently replaced or disassembled, assembled and maintained, the repeated utilization rate of the photovoltaic panel and the heat collector is increased, cost is reduced, and resources are saved. The photovoltaic panel assembly comprises a photovoltaic panel outer frame and a photovoltaic panel; the heat collector is a micro-channel flat pipe assembly and comprises a micro-channel flat pipe, a corresponding liquid inlet pipeline and a corresponding liquid outlet pipeline; a thermally conductive silicone grease layer; each high-strength pressing strip comprises a frame connecting strip and a convex pressing end; and a corresponding fastening assembly. The photovoltaic panel is arranged on the upper layer of the photovoltaic panel outer frame, the lower surface of the photovoltaic panel is coated with a heat conduction silicone grease layer, and the upper surfaces of the micro-channel flat pipes are tightly attached to the lower surface of the heat conduction silicone grease layer.

Description

Technical Field

[0001] The invention relates to the technical field of photovoltaic thermal collectors, and in particular to a repairable photovoltaic thermal collector. Background Art

[0002] Photovoltaic thermal (PVT) collector refers to a structure in which the liquid working medium flowing in the collector collects and carries away the working waste heat generated by the photovoltaic module during operation, thereby reducing the working temperature of the photovoltaic module and improving the power generation efficiency. The existing photovoltaic thermal collector includes an upper photovoltaic panel and a lower collector. In order to ensure reliable heat conduction, the photovoltaic panel and the collector need to be bonded by EVA, which makes the photovoltaic panel and the collector reliably connected and ensures the heat collection effect of the collector; however, with this structure, once any component of the photovoltaic panel and the collector is damaged, the entire system will not be able to work normally and can only be scrapped, which makes it impossible to replace or repair some components of the existing photovoltaic thermal collector, resulting in a waste of cost and resources. Summary of the invention

[0003] In response to the above problems, the present invention provides a repairable photovoltaic thermal collector, which allows photovoltaic panels and collectors to be replaced or disassembled and repaired individually, thereby improving the reuse rate of photovoltaic panels and collectors, reducing costs and saving resources.

[0004] A replaceable photovoltaic thermal collector, characterized in that it comprises:

[0005] A photovoltaic panel assembly, comprising a photovoltaic panel outer frame and a photovoltaic panel;

[0006] The collector is a microchannel flat tube assembly, which includes a microchannel flat tube and corresponding liquid inlet and outlet pipelines;

[0007] Thermal grease layer;

[0008] Several high-strength pressure strips, including frame connecting strips and raised pressure ends;

[0009] and corresponding fastening components;

[0010] The photovoltaic panel is arranged on the upper layer of the photovoltaic panel outer frame, and the lower surface of the photovoltaic panel is coated with a thermal grease layer. The upper surface of the microchannel flat tube is in close contact with the lower surface of the thermal grease layer. A plurality of high-strength pressure strips are arranged at horizontal or vertical intervals along the bottom of the photovoltaic outer frame. The two ends of the frame connecting strip of each high-strength pressure strip are respectively fixed to the corresponding connection positions of the photovoltaic panel outer frame through fastening components. The upper end of the raised pressing end is in close contact with the lower surface of the microchannel flat tube, and the raised pressing end makes the upper surface of the microchannel flat tube close to the lower surface of the thermal grease layer.

[0011] It is further characterized by:

[0012] All high-strength beading strips are set in parallel;

[0013] The inner side of the outer frame of the photovoltaic panel corresponding to the liquid inlet pipeline and the liquid outlet pipeline is provided with a high-strength bead parallel to the liquid inlet pipeline or the liquid outlet pipeline. The high-strength bead is used to reinforce the position of the pipeline to ensure that the upper surface of the microchannel flat tube at the corresponding position is in close contact with the lower surface of the thermal grease layer;

[0014] The raised pressure end of the high-strength pressure strip is cut off at a position corresponding to the outer frame of the photovoltaic panel, so as to facilitate the reliable assembly of the high-strength pressure strip;

[0015] Since the high-strength pressure strip is fixed only by the two ends in the height direction and the bottom edge of the outer frame of the photovoltaic panel, the high-strength pressure strip is required to be not easily deformed in its own length direction;

[0016] The material of the high-strength layering strip is a metal material, an organic polymer material, an inorganic non-metallic material, or a composite material, which can meet the high-strength requirement;

[0017] The high-strength layering strips are T-shaped layering strips or I-shaped layering strips;

[0018] The thermally conductive silicone grease layer is obtained by coating a high thermally conductive insulating organic silicon material, which is in a paste-like state and does not solidify when used for a long time at a temperature of -60°C to +230°C.

[0019] The thickness of the thermal conductive silicone grease layer is 0.2 mm to 1.0 mm, which ensures reliable heat exchange between the photovoltaic panel and the microchannel flat tube.

[0020] After adopting the structure of the present invention, reliable heat exchange is carried out between the photovoltaic panel and the microchannel flat tube through the thermal grease layer. The thermal grease layer is kept in a paste-like state for a long time under a temperature of -60°C to +230°C and does not solidify. The lower part of the microchannel flat tube is firmly held by the protruding pressure end, so that the thermal grease layer and the photovoltaic panel and the microchannel flat tube maintain stable and reliable adhesion. When the photovoltaic panel, the microchannel flat tube or other components fail or are damaged, the fasteners are removed, and then the photovoltaic panel and the microchannel flat tube assembly are separated. At this time, the adhesion of the thermal grease layer will not destroy any component structure. After the photovoltaic panel, the microchannel flat tube or other components are replaced or repaired, the thermal grease layer is coated and smoothed again on the bottom of the photovoltaic panel, and the microchannel flat tube assembly is reliably assembled through the high-strength layering strip, so that the microchannel flat tube is close to the lower surface of the thermal grease layer; the photovoltaic panel and the collector can be replaced or disassembled and repaired separately, which improves the reuse rate of the photovoltaic panel and the collector, reduces costs and saves resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a bottom view structural schematic diagram of a specific embodiment of the present invention;

[0022] Figure 2 It is a partial assembly cross-sectional view of the microchannel flat tube, photovoltaic panel, thermal grease layer, photovoltaic panel outer frame, and high-strength layering strip according to the first specific embodiment of the present invention;

[0023] Figure 3 It is a partial assembly cross-sectional view of the microchannel flat tube, photovoltaic panel, thermal conductive silicone grease layer, photovoltaic panel outer frame, and high-strength layering strip according to the second specific embodiment of the present invention;

[0024] The names corresponding to the serial numbers in the figure are as follows:

[0025] Photovoltaic panel assembly 10, photovoltaic panel outer frame 11, bottom edge 111, photovoltaic panel 12, collector 20, microchannel flat tube 21, microchannel flat tube fitting 211, liquid inlet pipeline 22, liquid outlet pipeline 23, thermal grease layer 30, high-strength pressure strip 40, frame connecting strip 41, raised pressure strip 42, connecting strip 43, plane pressure strip 44, fastening assembly 50, bolts 51, nuts 52. DETAILED DESCRIPTION

[0026] A repairable photovoltaic thermal collector, see Figure 1-Figure 3 , which includes a photovoltaic panel assembly 10, a heat collector 20, a thermal grease layer 30, a plurality of high-strength pressure strips 40, and a corresponding fastening assembly 50;

[0027] The photovoltaic panel assembly 10 includes a photovoltaic panel outer frame 11 and a photovoltaic panel 12. The photovoltaic panel 12 is pressed into the upper space of the photovoltaic panel outer frame 11. A positioning hole is opened at a corresponding position of the bottom edge 111 of the lower space of the long side of the photovoltaic panel outer frame 11. The positioning hole is used to fix the high-strength pressure strip 40.

[0028] The collector 20 is a microchannel flat tube assembly, which includes a microchannel flat tube 21 and a corresponding liquid inlet pipeline 22 and a liquid outlet pipeline 23, wherein the microchannel flat tube 21 is formed by a plurality of groups of microchannel flat tube fittings 211 being spliced ​​together at intervals;

[0029] Each high-strength pressure strip 40 includes a frame connecting strip 41 and a protruding pressure end. Both ends of the frame connecting strip 41 in the length direction are provided with fixed positioning holes.

[0030] The lower surface of the photovoltaic panel 12 is coated with a thermal grease layer 30, and the upper surface of the microchannel flat tube 21 is in close contact with the lower surface of the thermal grease layer 30. A plurality of high-strength pressure strips 40 are arranged at intervals along the long side of the photovoltaic outer frame 11. The two ends of the frame connecting strip 41 of each high-strength pressure strip 40 are respectively fixed to the positioning holes of the corresponding bottom edge 111 of the photovoltaic panel outer frame 11 through the fastening assembly 50. The upper side of the raised pressure end 42 is in close contact with the lower surface of the microchannel flat tube 21, and the raised pressure end 42 makes the upper surface of the microchannel flat tube 21 in close contact with the lower surface of the thermal grease layer 30.

[0031] In a specific implementation, the liquid inlet pipeline 22 and the liquid outlet pipeline 23 (the positions of the two are interchangeable) are arranged at the corresponding inner positions of the short side of the lower layer area of ​​the photovoltaic panel outer frame 11, and all high-strength layering strips 40 are arranged in parallel along the long side of the photovoltaic panel outer frame 11, and the high-strength layering strips 40 are arranged parallel to the liquid inlet pipeline 22;

[0032] The inner side of the photovoltaic panel outer frame 11 corresponding to the liquid inlet pipeline 22 and the liquid outlet pipeline 23 is provided with a high-strength bead 40 arranged parallel to the liquid inlet pipeline 22 or the liquid outlet pipeline 23. The high-strength bead 40 here is used to reinforce the position of the pipeline to ensure that the upper surface of the microchannel flat tube 21 at the corresponding position is closely attached to the lower surface of the thermal conductive silicone grease layer 30;

[0033] The raised pressing end 4 of the high-strength pressure strip 40 is cut off at a position corresponding to the bottom edge 111 of the photovoltaic panel outer frame 11 , so as to facilitate the reliable assembly of the high-strength pressure strip 40 .

[0034] In specific implementation, the high-strength bead 40 is fixedly connected to the bottom edge 111 of the photovoltaic panel outer frame 11 only through the two ends in the length direction, so the high-strength bead 40 is not easy to deform in its own length direction; the material of the high-strength bead 40 is a metal material, an organic polymer material, an inorganic non-metallic material, or a composite material that meets the high strength requirement. In a specific embodiment, the high-strength bead 40 is an aluminum alloy bead, which is a T-shaped bead, and its material is 60063-T5 aluminum alloy, and is obtained through an anodizing process.

[0035] In the first specific embodiment, when the raised pressing end is a raised pressure strip 42 perpendicular to the frame connecting strip, the entire high-strength pressure strip is a T-shaped pressure strip.

[0036] In the second specific embodiment, when the raised pressing end includes a connecting strip 43 and a plane pressing strip 44, the plane pressing strip 44 is arranged parallel to the frame connecting strip 41 and connected through the connecting strip 43, and the entire high-strength pressing strip becomes an I-shaped pressing strip.

[0037] The height of the protruding pressing end of the high-strength pressure strip 40 ensures that the upper surface of the microchannel flat tube 21 is in close contact with the lower surface of the thermal grease layer 30 .

[0038] In a specific embodiment, the thermal grease layer 30 is obtained by coating a high thermal conductivity insulating silicone material. The high thermal conductivity insulating silicone material maintains a paste-like form and does not solidify when used for a long time at a temperature of -60°C to +230°C. This property is used to facilitate the replacement or repair of components of the photovoltaic thermal collector. In a specific implementation, the thermal conductivity of the high thermal conductivity insulating silicone material is 2.0W / m·K (the thermal conductivity coefficient is between 1.0 and 5.0W / m·k), which provides excellent thermal conduction or heat exchange effects.

[0039] In a specific embodiment, the thickness of the thermal conductive silicone grease layer 30 is 0.2 mm to 1.0 mm, which ensures reliable heat exchange between the photovoltaic panel and the microchannel flat tube.

[0040] In a specific embodiment, the fastening assembly 50 includes a bolt 51 and a nut 52. Each high-strength pressure strip 40 corresponds to two sets of fastening assemblies 50. The bolt 51 is pre-pierced through the positioning hole and then protrudes downward. The corresponding end of the frame connecting strip of the high-strength pressure strip 40 is pressed from bottom to top on the lower surface of the bottom edge 111. The bolt passes through the positioning hole, is fixed in the positioning hole, and is fastened to the nut below to form a reliable fastening. When disassembling, the high-strength pressure strip 40 can be removed by loosening the nut.

[0041] In specific implementation, a flexible cushion layer is further provided at the contact position between the frame connecting strip 41 and the photovoltaic outer frame 11, so that it is not easy to be worn during fastening, thereby ensuring a reliable positioning connection.

[0042] The working principle is as follows: the photovoltaic panel and the microchannel flat tube are reliably heat exchanged through the thermal grease layer. The thermal grease layer is kept in a paste-like state and does not solidify when used for a long time at a temperature of -60℃ to +230℃. The bottom of the microchannel flat tube is firmly held by the raised pressure end, so that the thermal grease layer and the photovoltaic panel and the microchannel flat tube maintain stable and reliable adhesion. When the photovoltaic panel, microchannel flat tube or other components fail or are damaged, the fasteners are removed to separate the photovoltaic panel and the microchannel flat tube assembly. At this time, the adhesion of the thermal grease layer will not destroy the structure of any component. After the photovoltaic panel, microchannel flat tube or other components are replaced or repaired, the thermal grease layer is applied and smoothed again on the bottom of the photovoltaic panel, and the microchannel flat tube assembly is reliably assembled through high-strength pressure strips, so that the microchannel flat tube is close to the lower surface of the thermal grease layer; it enables the photovoltaic panel and the collector to be replaced or disassembled and repaired separately, improves the reuse rate of the photovoltaic panel and the collector, reduces costs and saves resources.

[0043] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0044] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A replaceable photovoltaic thermal collector, characterized in that: It includes: A photovoltaic panel assembly, comprising a photovoltaic panel outer frame and a photovoltaic panel; The collector is a microchannel flat tube assembly, which includes a microchannel flat tube and corresponding liquid inlet and outlet pipelines; Thermal grease layer; Several high-strength pressure strips, including frame connecting strips and raised pressure ends; and corresponding fastening components; The photovoltaic panel is arranged on the upper layer of the photovoltaic panel outer frame, and the lower surface of the photovoltaic panel is coated with a thermal grease layer. The upper surface of the microchannel flat tube is in close contact with the lower surface of the thermal grease layer. A plurality of high-strength pressure strips are arranged at horizontal or vertical intervals along the bottom of the photovoltaic outer frame. The two ends of the frame connecting strip of each high-strength pressure strip are respectively fixed to the corresponding connection positions of the photovoltaic panel outer frame through fastening components. The upper end of the raised pressing end is in close contact with the lower surface of the microchannel flat tube, and the raised pressing end makes the upper surface of the microchannel flat tube close to the lower surface of the thermal grease layer.

2. A replaceable photovoltaic thermal collector according to claim 1, characterized in that: All high-strength layering strips are arranged in parallel.

3. A replaceable photovoltaic thermal collector according to claim 2, characterized in that: The inner side of the outer frame of the photovoltaic panel corresponding to the liquid inlet pipeline and the liquid outlet pipeline is provided with a high-strength strip parallel to the liquid inlet pipeline or the liquid outlet pipeline. The high-strength strip here is used to reinforce the pipeline position to ensure that the upper surface of the microchannel flat tube at the corresponding position is tightly attached to the lower surface of the thermal grease layer.

4. The replaceable photovoltaic thermal collector according to claim 1, characterized in that: The raised pressing end of the high-strength pressure strip is cut off at a position corresponding to the outer frame of the photovoltaic panel.

5. The replaceable photovoltaic thermal collector according to claim 1, characterized in that: Since the high-strength pressure strip is fixed only by the two ends in the height direction and the bottom edge of the outer frame of the photovoltaic panel, the high-strength pressure strip is required to be not easily deformed in its own length direction; The material of the high-strength layering strip is a metal material, an organic polymer material, an inorganic non-metallic material, or a composite material, as long as it meets the high-strength requirement.

6. The replaceable photovoltaic thermal collector according to claim 1, characterized in that: The high-strength layering strip is a T-shaped layering strip or an I-shaped layering strip.

7. The replaceable photovoltaic thermal collector according to claim 1, characterized in that: The thermally conductive silicone grease layer is obtained by coating a high thermally conductive insulating organic silicon material. The high thermally conductive insulating organic silicon material is in a paste-like state when used for a long time at a temperature of -60°C to +230°C and does not solidify.

8. The replaceable photovoltaic thermal collector according to claim 7, characterized in that: The thickness of the thermal conductive silicone grease layer is 0.2 mm to 1.0 mm.

Images