Cleaning device and photovoltaic module
By designing rainwater collection and blowing heat dissipation mechanisms on photovoltaic modules, and using natural wind and rainwater for dust removal and cooling, the problems of pollution and heat spot effects of photovoltaic modules are solved, improving power generation efficiency and reducing maintenance costs.
Patent Information
- Application Number
- CN202420106828.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-16
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2034-01-16
AI Technical Summary
When installed outdoors, photovoltaic modules are easily contaminated by sand, soil, dust, etc., resulting in a decrease in light transmittance and affecting power generation efficiency. Local obstruction and dirt such as soil and bird dropping will cause a heat spot effect, which may lead to local burning of components and safety incidents.
Design a cleaning device, including a rainwater collection mechanism and a blow-air cooling mechanism, uses natural wind and rainwater for long-term low-cost dust removal and cooling, reduces local temperature of photovoltaic modules, removes dust through rainwater flushing and blow-air, and reduces static electricity and dust adhesion.
It effectively improves the power generation efficiency of photovoltaic modules, reduces the whitening of the battery caused by the heat spot effect, avoids local overheating and burning of the modules, and achieves low-cost long-term maintenance.
Smart Images
Figure CN222169746U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of photovoltaics, in particular to a cleaning device and a photovoltaic component. Background Art
[0002] Photovoltaic modules are usually installed outdoors in an inclined manner. Due to sand, dust and other reasons, fine dust particles will adhere to their surface. Dust particles will affect the transmittance of light, and then affect the amount of radiation received by the surface of the photovoltaic module, affecting the power generation efficiency. In addition, local obstructions such as mud and bird droppings on the surface of the photovoltaic module are difficult to remove, which will cause hot spot effects in local locations of the photovoltaic module. The hot spot effect will reduce the output power of the photovoltaic module to a certain extent. If the heating temperature exceeds a certain limit, it will cause permanent damage such as partial burning of the photovoltaic module, and may even cause safety incidents. Based on this, in order to improve the power generation efficiency of photovoltaic modules, photovoltaic modules need to be cleaned regularly. Among them, due to wind, sand and rain, the mud attached to the surface of the photovoltaic module will be brought to the lower edge of the photovoltaic module by rainwater to form attached precipitation. The attached precipitation blocks part of the battery cell, forming a hot spot effect. The hot spot effect will cause the temperature here to rise and generate static electricity. Static electricity will further absorb dust and attach it to the surface of the photovoltaic module, thus forming a vicious cycle. In addition, when the photovoltaic module is generating electricity normally, the junction box, which is the current extraction component of the module, will also heat up. The heating of the junction box will also strengthen the static electricity, aggravate the precipitation and accumulation of dust, and also cause the hot spot effect. Utility Model Content
[0003] Based on this, it is necessary to provide a cleaning device. The cleaning device of the utility model has a simple structure and low cost. When in use, it can make full use of natural wind and rain to achieve the functions of long-term low-cost dust removal and cooling, reduce the local temperature of photovoltaic modules, and greatly improve the whitening phenomenon of photovoltaic module cells caused by hot spot effect.
[0004] An embodiment of the present application provides a cleaning device.
[0005] A cleaning device includes a rainwater collecting mechanism and an air blowing and heat dissipation mechanism, wherein the rainwater collecting mechanism is used to collect rainwater and use it to flush the upper surface of a photovoltaic module, and the air blowing and heat dissipation mechanism includes a collecting component and a blowing pipe, wherein the collecting component has a collecting channel, and the opening size of the first end of the collecting channel is larger than the opening size of the second end, one end of the blowing pipe is connected to the collecting component and communicated with the second end opening, and the other end of the blowing pipe is used to face the lower edge of the photovoltaic module.
[0006] In some embodiments, the rainwater collection mechanism includes a rainwater receiving trough, a water reservoir and a water outlet pipe. The installation height of the rainwater receiving trough is higher than the photovoltaic module. The rainwater receiving trough is used to collect rainwater. The water reservoir is connected to the rainwater receiving trough to store rainwater collected from the rainwater receiving trough. One end of the water outlet pipe is connected to the water reservoir and the other end is used to extend to the upper surface of the photovoltaic module.
[0007] In some of the embodiments, the installation height of the rainwater collection trough is higher than the maximum height of the photovoltaic module.
[0008] In some of the embodiments, the water reservoir is installed on the back side of the photovoltaic module during installation.
[0009] In some embodiments, there are multiple water outlet pipes, and the multiple water outlet pipes are distributed at different positions on the upper surface of the photovoltaic component.
[0010] In some embodiments, the rainwater collection mechanism further includes a valve component, and the valve component is installed on the water outlet pipe to control the opening and closing of the water outlet pipe.
[0011] In some embodiments, the valve component is a manual valve, or the valve component is an electric valve that opens and closes at a fixed time.
[0012] In some embodiments, the collecting component is funnel-shaped.
[0013] In some embodiments, there are multiple air blowing and heat dissipation mechanisms, which are distributed at different positions on the upper surface of the photovoltaic component, and the air blowing pipe of at least one air blowing and heat dissipation mechanism extends to the junction box of the photovoltaic component.
[0014] An embodiment of the present invention further provides a photovoltaic module.
[0015] A photovoltaic assembly comprises the cleaning device.
[0016] The cleaning device has a simple structure and low cost. When in use, it can make full use of natural wind and rainwater to achieve the functions of long-term low-cost dust removal and cooling, reduce the local temperature of photovoltaic modules, and greatly improve the whitening phenomenon of photovoltaic module cells caused by hot spot effect. Specifically, when in use, the cleaning device collects rainwater through the rainwater collection mechanism. After the rainwater is collected, it can be directly washed on the upper surface of the photovoltaic module. After being washed by rainwater, the dust on the upper surface of the photovoltaic module is infiltrated, reducing the adhesion between the dust and the photovoltaic module, making it easy to remove. Then, the upper surface of the photovoltaic module is purged through the blowing and heat dissipation mechanism. The purging process is continuous. Since the opening size of the first end of the collection channel of the collecting component is larger than the opening size of the second end, the collecting component can collect air at all times. The collected air flow is blown out through the second end opening with a small size, which can increase the air flow pressure and speed, and is easy to blow the dust on the lower edge of the photovoltaic module. Since the collecting component does not require external electricity and other energy costs, the purging and cooling functions can be achieved by only using natural wind. In addition, the air blowing pipe of the air blowing and heat dissipation mechanism can also be extended to the junction box of the photovoltaic module to cool the junction box. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative work.
[0018] In order to more completely understand the present application and its beneficial effects, the following description will be made in conjunction with the accompanying drawings. In the following description, the same reference numerals represent the same parts.
[0019] FIG1 is a schematic diagram of the cooperation between a cleaning device and a photovoltaic module according to an embodiment of the present utility model;
[0020] FIG2 is a schematic structural diagram of a rainwater collection mechanism of a cleaning device according to an embodiment of the present utility model;
[0021] FIG3 is a schematic structural diagram of an air blowing and heat dissipation mechanism of a cleaning device according to an embodiment of the utility model.
[0022] Description of Reference Numerals
[0023] 100. Rainwater collecting mechanism; 110. Rainwater collecting tank; 120. Water storage tank; 130. Water outlet pipe; 200. Blowing and heat dissipation mechanism; 210. Collecting component; 220. Blowing pipe; 300. Photovoltaic module; 310. Junction box. DETAILED DESCRIPTION
[0024] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.
[0025] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0026] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0027] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.
[0028] In the description of the present utility model, "several" means more than one, "many" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used to distinguish the technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.
[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.
[0030] The present application provides a cleaning device to solve the problem in the conventional technology that dust deposition during the application of photovoltaic modules and heating of the junction box during operation will aggravate the adhesion of dust to the module surface, forming a hot spot effect, resulting in reduced output power of the photovoltaic modules and partial burning of the photovoltaic modules. The cleaning device will be described below in conjunction with the accompanying drawings.
[0031] The cleaning device provided in the embodiment of the present application is exemplified in Figure 1, which is a schematic diagram of the structure of the cleaning device provided in the embodiment of the present application in cooperation with the photovoltaic module 300. The cleaning device of the present application can be used for cleaning dust from the photovoltaic module 300 and other purposes.
[0032] In order to more clearly illustrate the structure of the cleaning device, the cleaning device will be introduced below with reference to the accompanying drawings.
[0033] For example, please refer to FIG. 1, which is a schematic diagram of the structure of the cleaning device provided in the embodiment of the present application and the photovoltaic module 300. A cleaning device includes a rainwater collection mechanism 100 and a blowing and heat dissipation mechanism 200. The rainwater collection mechanism 100 is used to collect rainwater and to rinse the upper surface of the photovoltaic module 300. Referring to FIG. 3, FIG. 3 is a schematic diagram of the structure of the blowing and heat dissipation mechanism 200 of the cleaning device of an embodiment of the utility model, and the blowing and heat dissipation mechanism 200 includes a collecting component 210 and a blowing pipe 220. The collecting component 210 has a collecting channel. The opening size of the first end of the collecting channel is larger than the opening size of the second end. One end of the blowing pipe 220 is connected to the collecting component 210 and communicates with the second end opening, and the other end of the blowing pipe 220 is used to face the lower edge of the photovoltaic module 300. The opening size of the first end of the collecting channel is larger than the opening size of the second end, which can increase the speed and pressure of the air flow collected by the collecting channel.
[0034] It should be noted that the hot spot effect of a photovoltaic module refers to the fact that under certain conditions, the blocked or defective areas in the series branches of the photovoltaic module 300 in the power generation state are treated as loads, consuming the energy generated by other areas, causing local overheating. This phenomenon is called the "hot spot effect" of the photovoltaic module 300.
[0035] When the above-mentioned cleaning device is in use, rainwater is collected by the rainwater collecting mechanism 100. After the rainwater is collected, it can be directly washed onto the upper surface of the photovoltaic module 300. After being washed by the rainwater, the dust on the upper surface of the photovoltaic module 300 is soaked, which reduces the adhesion between the dust and the photovoltaic module 300 and makes it easy to remove. Then, the upper surface of the photovoltaic module 300 is purged by the blowing and heat dissipation mechanism 200. The purging process is continuous. Since the opening size of the first end of the collecting channel of the collecting component 210 is larger than the opening size of the second end, the collecting component 210 can collect air at all times. The collected air flow is blown out through the small-sized second end opening, which can increase the air flow pressure and speed, making it easy to blow away the dust on the lower edge of the photovoltaic module 300. At the same time, the flowing air can reduce the temperature of the photovoltaic module 300. Since the collecting component 210 does not require external electricity and other energy costs, the purging and cooling functions can be achieved by only using natural wind. In addition, the blowing pipe 220 of the blowing and heat dissipation mechanism 200 may also extend to the junction box 310 of the photovoltaic assembly 300 to cool the junction box 310 .
[0036] In some embodiments, see FIG. 2 , which is a schematic diagram of a rainwater collection mechanism 100 of a cleaning device according to an embodiment of the utility model, wherein the rainwater collection mechanism 100 includes a rainwater receiving tank 110, a water reservoir 120, and a water outlet pipe 130. The installation height of the rainwater receiving tank 110 is higher than the photovoltaic module 300. The rainwater receiving tank 110 is used to collect rainwater. The water reservoir 120 is connected to the rainwater receiving tank 110 for storing rainwater collected from the rainwater receiving tank 110. One end of the water outlet pipe 130 is connected to the water reservoir 120 and the other end is used to extend to the upper surface of the photovoltaic module 300.
[0037] In some embodiments, the installation height of the rainwater collecting tank 110 is higher than the maximum height of the photovoltaic assembly 300. The rainwater collecting tank 110 needs to avoid blocking the light of the photovoltaic assembly 300 during installation.
[0038] In some embodiments, as shown in FIG2 , the water reservoir 120 is installed on the back of the photovoltaic assembly 300. The water reservoir 120 is installed on the back of the photovoltaic assembly 300 to avoid light blocking of the photovoltaic assembly 300. Preferably, the water reservoir 120 can be installed on the bracket of the photovoltaic assembly 300 during installation.
[0039] In some embodiments, there are multiple water outlet pipes 130. The multiple water outlet pipes 130 are distributed at different positions on the upper surface of the photovoltaic assembly 300. The multiple water outlet pipes 130 can clean and wet different positions on the upper surface of the photovoltaic assembly 300, thereby increasing the cleaning area of the photovoltaic assembly 300.
[0040] In some embodiments, the rainwater collection mechanism 100 further includes a valve component. The valve component is installed on the water outlet pipe 130 to control the opening and closing of the water outlet pipe 130.
[0041] In some embodiments, the valve component is a manual valve, or the valve component is an electric valve that opens and closes at a fixed time.
[0042] In some embodiments, the collecting component 210 of the air blowing and heat dissipation mechanism 200 is funnel-shaped. Such a configuration enables the collecting component 210 to collect air and accelerate the air flow rate.
[0043] In some embodiments, there are multiple air-blowing heat-dissipating mechanisms 200 . The multiple air-blowing heat-dissipating mechanisms 200 are distributed at different positions on the upper surface of the photovoltaic assembly 300 . The air-blowing pipe 220 of at least one air-blowing heat-dissipating mechanism 200 extends to the junction box 310 of the photovoltaic assembly 300 .
[0044] In some of the embodiments, the installation position of the blowing component 210 can be installed according to the monsoon wind direction of the photovoltaic assembly 300 installation area, and the blowing pipe 220 can be set to be bent or curved as needed.
[0045] An embodiment of the present invention further provides a photovoltaic assembly 300 .
[0046] A photovoltaic module 300 includes the above-mentioned cleaning device. During installation, the installation height of the rainwater collection tank 110 of the rainwater collection mechanism 100 is higher than the maximum height of the photovoltaic module 300. The water storage tank 120 is installed on the back of the photovoltaic module 300 to avoid light blocking of the photovoltaic module 300. There are multiple water outlet pipes 130, and one water outlet pipe 130 is respectively provided on the left and right sides of the photovoltaic module 300. The installation position of the blowing component 210 can be installed according to the monsoon wind direction of the installation area of the photovoltaic module 300, wherein the end of the blowing pipe 220 of at least one blowing and heat dissipation mechanism 200 faces the junction box 310, and a blowing pipe 220 of the blowing and heat dissipation mechanism 200 is respectively provided at the lower edge positions on the left and right sides of the upper surface of the photovoltaic module 300.
[0047] The above-mentioned cleaning device has a simple structure and low cost. When in use, it can make full use of natural wind and rain to achieve long-term low-cost dust removal and cooling functions, reduce the local temperature of the photovoltaic module 300, and greatly improve the whitening phenomenon of the photovoltaic module 300 cells caused by the hot spot effect.
[0048] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.
[0049] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0050] The above-mentioned embodiments only express several implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the utility model, and these all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.
Claims
1. A cleaning device, characterized in that: The invention comprises a rainwater collection mechanism (100) and an air blowing and heat dissipation mechanism (200), wherein the rainwater collection mechanism (100) is used to collect rainwater and to flush the upper surface of a photovoltaic module (300), and the air blowing and heat dissipation mechanism (200) comprises a collection component (210) and an air blowing pipe (220), wherein the collection component (210) has a collection channel, wherein the opening size of the first end of the collection channel is larger than the opening size of the second end, one end of the air blowing pipe (220) is connected to the collection component (210) and communicates with the second end opening, and the other end of the air blowing pipe (220) is used to face the lower edge of the photovoltaic module (300).
2. The cleaning device according to claim 1, characterized in that The rainwater collection mechanism (100) comprises a rainwater collection trough (110), a water reservoir (120) and a water outlet pipe (130); the installation height of the rainwater collection trough (110) is higher than the photovoltaic assembly (300); the rainwater collection trough (110) is used to collect rainwater; the water reservoir (120) is connected to the rainwater collection trough (110) to store rainwater collected from the rainwater collection trough (110); one end of the water outlet pipe (130) is connected to the water reservoir (120) and the other end is used to extend to the upper surface of the photovoltaic assembly (300).
3. The cleaning device according to claim 2, characterized in that: The installation height of the rainwater collection trough (110) is higher than the maximum height of the photovoltaic assembly (300).
4. The cleaning device according to claim 2, characterized in that: The water storage tank (120) is used to be installed on the back side of the photovoltaic assembly (300) during installation.
5. The cleaning device according to claim 2, characterized in that: There are a plurality of water outlet pipes (130), and the plurality of water outlet pipes (130) are distributed at different positions on the upper surface of the photovoltaic assembly (300).
6. The cleaning device according to any one of claims 2 to 5, characterized in that: The rainwater collection mechanism (100) further comprises a valve component, wherein the valve component is mounted on the water outlet pipe (130) to control the opening and closing of the water outlet pipe (130).
7. The cleaning device according to claim 6, characterized in that: The valve component is a manual valve, or the valve component is an electric valve that opens and closes at a fixed time.
8. The cleaning device according to any one of claims 1 to 5 and 7, characterized in that: The collecting component (210) is funnel-shaped.
9. The cleaning device according to any one of claims 1 to 5 and 7, characterized in that: The number of the air blowing and heat dissipation mechanisms (200) is multiple, and the multiple air blowing and heat dissipation mechanisms (200) are distributed at different positions on the upper surface of the photovoltaic component (300), wherein the air blowing pipe (220) of at least one air blowing and heat dissipation mechanism (200) extends to the junction box (310) of the photovoltaic component (300).
10. A photovoltaic module (300), characterized in that: A cleaning device comprising the cleaning device according to any one of claims 1 to 9.