Building facade photovoltaic component

Abstract

The utility model relates to a building facade photovoltaic component, belongs to the field of photovoltaic building integration, and solves the problem of poor heat dissipation effect caused by poor air flowability in the conventional photovoltaic component. The photovoltaic module comprises a photovoltaic module, a heat conduction layer, a base material and a junction box, the photovoltaic module, the heat conduction layer and the junction box are arranged on the base material, and the junction box is connected with the photovoltaic module; the heat conduction layer is used for conducting heat generated by the photovoltaic cell assembly to the base material. Heat dissipation channels are formed in the base material and comprise the vertical heat dissipation channel and the transverse heat dissipation channel, and the two ends of the vertical heat dissipation channel communicate with the external environment; one end of the transverse heat dissipation channel communicates with the vertical heat dissipation channel, the other end of the transverse heat dissipation channel communicates with the external environment, and hot air in the transverse heat dissipation channel can converge into the vertical heat dissipation channel and is discharged to the external environment through the vertical heat dissipation channel. The heat dissipation channel can reduce the airflow resistance, improve the fluidity of hot air in the heat dissipation channel and improve the heat dissipation efficiency.

Description

Technical Field

[0001] The utility model relates to the field of photovoltaic building integration, in particular to a building facade photovoltaic component. Background Art

[0002] Dry hanging of building materials is a special construction technology in current wall decoration. It is to hang building materials such as granite and artificial marble directly on the outer surface of the building structure, so as to play the role of beauty, sound insulation, waterproofing and decoration. In addition, the exterior wall of the building can receive sufficient sunlight, which will become an important application scenario for photovoltaic power generation.

[0003] Building integrated photovoltaics (BIPV) integrates solar power generation products (photovoltaic cell modules) into buildings, which not only changes the appearance of the building, but also generates electricity for the building. After the photovoltaic cell modules are integrated with the building substrate, the photovoltaic cell modules can maintain stable and long-term power generation without changing the original performance of the substrate.

[0004] Since only solar energy within a certain spectral range can produce the photoelectric effect, and only a small part of the solar energy actually projected onto the photovoltaic panel is converted into electrical energy output, the rest is converted into heat energy and discharged into the environment. If this heat is not taken away in time, the temperature of the photovoltaic panel will increase, resulting in a decrease in the photoelectric conversion efficiency. Therefore, strengthening the heat dissipation of the photovoltaic panel has an important impact on improving the photoelectric conversion efficiency. In the prior art, the heat dissipation of photovoltaic components adopts serpentine tubes. Since the heat dissipation of serpentine tubes requires the serpentine tubes to be arranged in a winding manner, the air flow path in the serpentine tubes is longer, thereby increasing the air flow resistance in the serpentine tubes, resulting in poor air flow in the photovoltaic components, resulting in poor heat dissipation effect of the photovoltaic components. Utility Model Content

[0005] In view of the above analysis, the utility model aims to provide a building facade photovoltaic component to solve the problem of poor air flow in existing photovoltaic components, resulting in poor heat dissipation effect.

[0006] The purpose of this utility model is mainly achieved through the following technical solutions:

[0007] A photovoltaic component for a building facade comprises a photovoltaic cell assembly, a heat-conducting layer, a substrate and a junction box, wherein the photovoltaic cell assembly and the heat-conducting layer are sequentially stacked on the substrate from top to bottom; the junction box is mounted on the substrate and connected to the photovoltaic cell assembly; the heat-conducting layer is used to conduct the heat generated by the photovoltaic cell assembly to the substrate and dissipate the heat through the substrate; a heat dissipation channel is provided on the substrate, the heat dissipation channel comprises a vertical heat dissipation channel and a horizontal heat dissipation channel, both ends of the vertical heat dissipation channel are connected to the external environment; one end of the horizontal heat dissipation channel is connected to the vertical heat dissipation channel, and the other end is connected to the external environment, the hot air in the horizontal heat dissipation channel can converge into the vertical heat dissipation channel, and be discharged to the external environment through the vertical heat dissipation channel; the horizontal heat dissipation channel comprises an inclined section, and the inclined section is inclined along the flow direction of the hot air in the vertical heat dissipation channel.

[0008] Furthermore, the inclined section is arc-shaped.

[0009] Furthermore, a plurality of the vertical heat dissipation channels and a plurality of the horizontal heat dissipation channels are provided, and the plurality of the vertical heat dissipation channels and the plurality of the horizontal heat dissipation channels form a heat dissipation channel network.

[0010] Furthermore, the heat dissipation channel further includes a connecting pipe, and two ends of the connecting pipe are respectively connected to two adjacent vertical heat dissipation channels.

[0011] Furthermore, the hot air outlet of the connecting pipe is staggered with the hot air outlet of the transverse heat dissipation channel.

[0012] Furthermore, the photovoltaic cell assembly includes a transparent protective layer, a photovoltaic cell layer and a water-blocking packaging plate stacked in sequence from top to bottom.

[0013] Furthermore, the photovoltaic cell assembly also includes a first adhesive film layer and a second adhesive film layer.

[0014] Furthermore, the first adhesive film layer is arranged between the transparent protective layer and the photovoltaic cell layer, the second adhesive film layer is arranged between the photovoltaic cell layer and the water-blocking packaging plate, and the first adhesive film layer and the second adhesive film layer are used to encapsulate the photovoltaic cell layer.

[0015] Furthermore, a wire trough is provided on the substrate, and the wire trough is used to install cables and junction boxes.

[0016] Furthermore, a heat insulating layer is provided on the substrate, and the heat insulating layer is used to prevent the heat in the substrate from being transferred to the building wall.

[0017] The technical solution of the utility model can achieve at least one of the following effects:

[0018] (1) The utility model provides a photovoltaic component for a building facade, wherein the photovoltaic component is provided with a heat dissipation channel on a substrate, wherein the heat dissipation channel includes a vertical heat dissipation channel and a horizontal heat dissipation channel, wherein both ends of the vertical heat dissipation channel are connected to the external environment; one end of the horizontal heat dissipation channel is connected to the vertical heat dissipation channel, and the other end is connected to the external environment; the hot air in the horizontal heat dissipation channel can converge into the vertical heat dissipation channel and be discharged to the external environment through the vertical heat dissipation channel, thereby shortening the air flow path, reducing the hot air flow resistance in the heat dissipation channel, thereby improving the fluidity of the hot air in the heat dissipation channel, and being able to promptly bring the heat generated by the photovoltaic cell assembly to the external environment, thereby improving the heat dissipation efficiency, and being able to effectively prevent the temperature of the photovoltaic cell assembly from rising, thereby avoiding a decrease in the photoelectric conversion efficiency.

[0019] (2) The utility model has the horizontal heat dissipation channel including a horizontal section and an inclined section, the inclined section is connected to the vertical heat dissipation channel, and the inclined section is inclined along the flow direction of the hot air in the vertical heat dissipation channel, which can prevent the hot air in the vertical heat dissipation channel from flowing back into the horizontal heat dissipation channel, thereby reducing the resistance of the hot air in the horizontal heat dissipation channel to converge into the vertical heat dissipation channel, and further improving the rate at which the hot air in the horizontal heat dissipation channel converges into the vertical heat dissipation channel.

[0020] In the present invention, the above-mentioned technical solutions can also be combined with each other to achieve more preferred combination solutions. Other features and advantages of the present invention will be described in the subsequent description, and some advantages can become obvious from the description, or can be understood by implementing the present invention. The purpose and other advantages of the present invention can be achieved and obtained through the contents specifically pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings are only used for the purpose of illustrating specific embodiments and are not to be considered as limiting the present invention. In the entire drawings, the same reference symbols represent the same components.

[0022] Figure 1 It is a schematic diagram of the structure of the photovoltaic component in the embodiment of the utility model;

[0023] Figure 2 It is one of the cross-sectional views of the photovoltaic component in the embodiment of the utility model;

[0024] Figure 3 This is the second cross-sectional view of the photovoltaic component in the embodiment of the utility model.

[0025] Reference numerals:

[0026] 1-photovoltaic cell assembly; 11-transparent protective layer; 12-photovoltaic cell layer; 13-water-blocking packaging board; 14-first adhesive film layer; 15-second adhesive film layer; 2-thermal conductive layer; 3-substrate; 31-heat dissipation channel; 311-vertical heat dissipation channel; 312-lateral heat dissipation channel; 313-connecting pipe; 32-wire trough; 4-thermal insulation layer; 5-junction box. DETAILED DESCRIPTION

[0027] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0028] Example 1

[0029] A specific embodiment of the utility model discloses a photovoltaic component for a building facade, such as Figure 1 and Figure 2 As shown, it includes a photovoltaic cell assembly 1, a thermal conductive layer 2, a substrate 3 and a junction box 5. The photovoltaic cell assembly 1 and the thermal conductive layer 2 are stacked on the upper surface of the substrate 3 from top to bottom, and the junction box 5 is installed on the back of the substrate 3. The junction box 5 is connected to the photovoltaic cell assembly 1; the thermal conductive layer 2 is used to conduct the heat generated by the photovoltaic cell assembly 1 to the substrate 3, and dissipate the heat through the substrate 3 to reduce the temperature of the photovoltaic cell assembly 1 and improve the performance and stability of the photovoltaic component.

[0030] Preferably, if Figure 3As shown, the substrate 3 is provided with a heat dissipation channel 31, and the heat dissipation channel 31 includes a vertical heat dissipation channel 311 and a horizontal heat dissipation channel 312 (when the photovoltaic component is dry-hung on the building wall, the vertical heat dissipation channel 311 extends in the vertical direction, and the horizontal heat dissipation channel 312 extends in the horizontal direction). Both ends of the vertical heat dissipation channel 311 are connected to the external environment, one end of the horizontal heat dissipation channel 312 is connected to the vertical heat dissipation channel 311, and the other end is connected to the external environment. The substrate 3 performs heat exchange with the air in the heat dissipation channel 31. The air in the vertical heat dissipation channel 311 moves upward after being heated and is discharged to the external environment, so that the air pressure in the vertical heat dissipation channel 311 is lower than the air pressure in the horizontal heat dissipation channel 312, thereby causing the hot air in the horizontal heat dissipation channel 312 to converge into the vertical heat dissipation channel 311. , and simultaneously introduce external air into the horizontal heat dissipation channel 312 to form an airflow path, and finally bring the heat of the substrate 3 to the external environment, cool the photovoltaic cell assembly 1, so as to prevent the temperature of the photovoltaic cell assembly 1 from rising and avoid the decrease in photoelectric conversion efficiency; compared with the prior art in which a serpentine tube is provided for heat dissipation, the heat dissipation channel 31 of this embodiment does not need to be arranged in a winding manner, and an airflow path is formed by providing a vertical heat dissipation channel 311 and a horizontal heat dissipation channel 312. The flow distance of hot air in the heat dissipation channel 31 is shorter, thereby reducing the hot air flow resistance in the heat dissipation channel 31, thereby improving the fluidity of the hot air in the heat dissipation channel 31, and can timely bring the heat generated by the photovoltaic cell assembly 1 to the external environment, thereby improving the heat dissipation efficiency, and can effectively prevent the temperature of the photovoltaic cell assembly 1 from rising and avoid the decrease in photoelectric conversion efficiency.

[0031] Preferably, the transverse heat dissipation channel 312 includes a horizontal section and an inclined section, the inclined section is connected to the vertical heat dissipation channel 311, and the inclined section is along the flow direction of the hot air in the vertical heat dissipation channel 311 (such as Figure 3 The vertical heat dissipation channel 311 is inclined (in the direction of the arrow in the vertical heat dissipation channel 311), which can prevent the hot air in the vertical heat dissipation channel 311 from flowing back into the horizontal heat dissipation channel 312, thereby reducing the resistance of the hot air in the horizontal heat dissipation channel 312 to converge into the vertical heat dissipation channel 311, and further increasing the rate at which the hot air in the horizontal heat dissipation channel 312 converges into the vertical heat dissipation channel 311.

[0032] Preferably, the inclined section is arc-shaped, so as to further reduce the resistance of the hot air in the horizontal heat dissipation channel 312 when flowing into the vertical heat dissipation channel 311, and further improve the air fluidity.

[0033] Preferably, a plurality of the vertical heat dissipation channels 311 and the transverse heat dissipation channels 312 are provided, and the plurality of the vertical heat dissipation channels 311 and the plurality of the transverse heat dissipation channels 312 form an interwoven heat dissipation channel network, thereby improving the heat exchange efficiency between the substrate 3 and the air in the heat dissipation channels 31 .

[0034] Preferably, the heat dissipation channel 31 also includes a connecting pipe 313, which is arranged between two adjacent vertical heat dissipation channels 311, and its two ends are respectively connected to the two adjacent vertical heat dissipation channels 311. The connecting pipe 313 can balance the air pressure in the two adjacent vertical heat dissipation channels 311, thereby achieving coordinated heat dissipation of multiple vertical heat dissipation channels 311, thereby improving the heat dissipation efficiency.

[0035] Preferably, the hot air outlet of the connecting pipe 313 is staggered with the hot air outlet of the horizontal heat dissipation channel 312, so as to avoid the hot air in the horizontal heat dissipation channel 312 interfering with the hot air in the connecting pipe 313 flowing into the vertical heat dissipation channel 311 when flowing into the vertical heat dissipation channel 311, thereby accelerating the flow of hot air and improving the heat dissipation efficiency.

[0036] Preferably, the photovoltaic cell assembly 1 includes a transparent protective layer 11, a photovoltaic cell layer 12 and a water-blocking packaging plate 13 stacked in sequence from top to bottom, the transparent protective layer 11 enables sunlight to penetrate and irradiate on the photovoltaic cell layer 12, and the photovoltaic cell layer 12 is used to absorb light to generate electricity; the transparent protective layer 11 is used to protect the photovoltaic cell layer 12 from external environmental erosion; the water-blocking packaging plate 13 is used to prevent water vapor contained in the substrate 3 from precipitating from the substrate 3 after being heated and invading the photovoltaic cell layer 12, causing damage to the photovoltaic cell layer 12.

[0037] Preferably, the photovoltaic cell assembly 1 also includes a first adhesive film layer 14 and a second adhesive film layer 15, the first adhesive film layer 14 is arranged between the transparent protective layer 11 and the photovoltaic cell layer 12, and the second adhesive film layer 15 is arranged between the photovoltaic cell layer 12 and the water-blocking packaging plate 13, and the first adhesive film layer 14 and the second adhesive film layer 15 are used to encapsulate the photovoltaic cell layer 12 to prevent dust, water vapor, etc. in the external environment from entering the photovoltaic cell layer 12, causing damage to the photovoltaic cell layer 12 and reducing the power generation efficiency of the photovoltaic cell layer 12.

[0038] Preferably, a wire groove 32 is provided on the back of the substrate 3 , and the wire groove 32 is used to install cables and junction boxes 5 , so as to prevent the cables and junction boxes 5 from protruding from the back of the substrate 3 and causing damage.

[0039] Preferably, the photovoltaic component further includes a heat insulation layer 4, which is disposed on the back of the substrate 3. The heat insulation layer 4 can prevent the heat in the substrate 3 from being transferred to the building wall.

[0040] The above is only a preferred specific implementation of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the present invention should be covered by the protection scope of the present invention.

Claims

1. A building facade photovoltaic component, characterized in that: The invention comprises a photovoltaic cell assembly (1), a heat-conducting layer (2), a substrate (3) and a junction box, wherein the photovoltaic cell assembly (1) and the heat-conducting layer (2) are sequentially stacked on the substrate (3) from top to bottom; the junction box is mounted on the substrate (3) and connected to the photovoltaic cell assembly (1); the heat-conducting layer (2) is used to conduct heat generated by the photovoltaic cell assembly (1) to the substrate (3), and to dissipate heat through the substrate (3); The substrate (3) is provided with a heat dissipation channel (31), the heat dissipation channel (31) comprising a vertical heat dissipation channel (311) and a horizontal heat dissipation channel (312), both ends of the vertical heat dissipation channel (311) are connected to the external environment; one end of the horizontal heat dissipation channel (312) is connected to the vertical heat dissipation channel (311), and the other end is connected to the external environment, and the hot air in the horizontal heat dissipation channel (312) can converge into the vertical heat dissipation channel (311) and be discharged to the external environment through the vertical heat dissipation channel (311); The transverse heat dissipation channel (312) comprises an inclined section, and the inclined section is inclined along the flow direction of the hot air in the vertical heat dissipation channel (311).

2. A building facade photovoltaic component according to claim 1, characterized in that: The inclined section is arc-shaped.

3. A building facade photovoltaic component according to claim 2, characterized in that: A plurality of the vertical heat dissipation channels (311) and the plurality of transverse heat dissipation channels (312) are provided, and the plurality of vertical heat dissipation channels (311) and the plurality of transverse heat dissipation channels (312) form a heat dissipation channel network.

4. A building facade photovoltaic component according to claim 3, characterized in that: The heat dissipation channel (31) further comprises a connecting pipe (313), and two ends of the connecting pipe (313) are respectively connected to two adjacent vertical heat dissipation channels (311).

5. A building facade photovoltaic component according to claim 4, characterized in that: The hot air outlet of the connecting pipe (313) and the hot air outlet of the transverse heat dissipation channel (312) are arranged in a staggered manner.

6. A building facade photovoltaic component according to claim 5, characterized in that: The photovoltaic cell assembly (1) comprises a transparent protective layer (11), a photovoltaic cell layer (12) and a water-blocking packaging plate (13) which are stacked in sequence from top to bottom.

7. A building facade photovoltaic component according to claim 6, characterized in that: The photovoltaic cell assembly (1) further comprises a first adhesive film layer (14) and a second adhesive film layer (15).

8. A building facade photovoltaic component according to claim 7, characterized in that: The first adhesive film layer (14) is arranged between the transparent protective layer (11) and the photovoltaic cell layer (12), and the second adhesive film layer (15) is arranged between the photovoltaic cell layer (12) and the water-blocking packaging plate (13). The first adhesive film layer (14) and the second adhesive film layer (15) are used to encapsulate the photovoltaic cell layer (12).

9. A building facade photovoltaic component according to claim 8, characterized in that: The base material (3) is also provided with a wire trough (32), and the wire trough (32) is used for installing cables and a junction box (5).

10. A building facade photovoltaic component according to claim 9, characterized in that: It also comprises a heat-insulating layer (4) arranged on the substrate (3), wherein the heat-insulating layer (4) is used to prevent the heat in the substrate (3) from being transferred to the building wall.

Images