Self-cleaning device and lighting device

Abstract

The utility model relates to the field of illumination, in particular to a self-cleaning device and an illumination device, and is applied to the illumination device comprising a light source. The one or more nozzles are arranged on the side of the light-transmitting plate and used for spraying liquid to the lower surface of the light-transmitting plate so as to clean the lower surface of the light-transmitting plate; and the lower surface of the light-transmitting plate is obliquely arranged, so that liquid sprayed to the lower surface of the light-transmitting plate by the nozzles flows to one side far away from the nozzles. Long-term accumulation of pollutants can be prevented, and cleanliness of the light source is kept.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the field of lighting, in particular to a self-cleaning device and a lighting device. BACKGROUND

[0002] In the field of lighting, in some harsh environments with dust, the lighting device will be attached by dust, resulting in the light emitted being weakened, which cannot meet the lighting demand, so that the actual situation cannot be observed or the image quality of the shooting is affected. SUMMARY

[0003] To overcome the problems in the related art, an exemplary embodiment of the present disclosure provides a self-cleaning device applied to a lighting device including a light source, wherein the self-cleaning device comprises: a light-transmitting plate configured to transmit light emitted by the light source; and one or more nozzles arranged on a side of the light-transmitting plate and configured to spray liquid to a lower surface of the light-transmitting plate to clean the lower surface of the light-transmitting plate; wherein the lower surface of the light-transmitting plate is arranged to be inclined, so that the liquid sprayed by the nozzles flows to a side away from the nozzles.

[0004] In some embodiments, the lower surface of the light-transmitting plate is provided with a hydrophilic layer configured to adsorb the liquid sprayed by the nozzles.

[0005] In some embodiments, the inclination angle of the lower surface of the light-transmitting plate is 3-10 degrees.

[0006] In some embodiments, the cross section of the liquid outlet of the nozzle is a sector surface, so that the liquid sprayed is in the form of a sector.

[0007] In some embodiments, the sector angle of the liquid sprayed by the nozzle is 50-80 degrees.

[0008] In some embodiments, the self-cleaning device comprises a plurality of nozzles, and the plurality of nozzles are arranged side by side, and the spacing between adjacent nozzles is 20-30 mm.

[0009] In some embodiments, the self-cleaning device further comprises: one or more air outlets arranged on a side of the light-transmitting plate and configured to spray gas to the lower surface of the light-transmitting plate.

[0010] In the second aspect, the present disclosure further provides a lighting device, wherein the lighting device comprises: a support; a light source mounted on the support and configured to provide light; and a self-cleaning device as described in the first aspect, wherein the light-transmitting plate is arranged below the light source, and the side away from the nozzles is fixedly connected to the support; and the nozzles are fixedly connected to the support.

[0011] In some embodiments, the lighting device further comprises a lampshade arranged above the light source and fixedly connected with the support, for reflecting light emitted by the light source.

[0012] In some embodiments, the lampshade is in the shape of a parabola, and the light source is arranged at a focal point of the parabola.

[0013] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory, and are not limiting to the present disclosure.

[0014] The present disclosure provides a self-cleaning device and a lighting device, wherein the self-cleaning device sprays liquid to a light-transmitting plate through one or more nozzles, so as to clean the light source, prevent long-term accumulation of pollutants, keep the light source clean, facilitate observation, and ensure the image quality and accuracy of shooting. BRIEF DESCRIPTION OF DRAWINGS

[0015] The present disclosure can be better understood by describing exemplary embodiments thereof with reference to the accompanying drawings, in which:

[0016] Figure 1 is a structural schematic diagram of a self-cleaning device according to an exemplary embodiment;

[0017] Figure 2 is a schematic diagram of a lighting device according to an exemplary embodiment;

[0018] Figure 3 is a perspective view of a lighting device according to an exemplary embodiment;

[0019] Figure 4 is a schematic diagram of a lampshade and a light source according to an exemplary embodiment. DETAILED DESCRIPTION

[0020] In the following detailed description of the present disclosure, it is to be understood that not all of the features of the embodiments described can be necessary in every instance, and therefore not all of these features can be described in the description of each embodiment. It should be appreciated that in the development of any such actual implementation, numerous implementation-specific decisions can be made to avert a variety of concrete decisions, which have to be made to accommodate specific combinations of constraints associated with the project or design. Also, it is to be understood that such a development effort might qualitatively and / or quantitatively differ from implementation to implementation, based on, inter alia, the experience of the developer, available resources, and conditions faced by the developer. Furthermore, it should be appreciated that dependent on the nature of the development effort, a design, manufacture, and / or production effort might be required to produce the technology disclosed herein, and such efforts should not be interpreted as a defect in the disclosure.

[0021] Unless otherwise defined, technical and scientific terms used in the claims and specification have their ordinary meaning as understood by one of ordinary skill in the art to which this disclosure pertains. The terms "first," "second," and similar terms do not imply any order, quantity, or importance, but are used to distinguish one element from another, and the terms "a" and "an" and "the" and similar terms mean "one or more," unless otherwise indicated. The terms "including," "containing," and similar terms are inclusive, meaning that elements or objects preceding the composition, quantifier, or field listed are encompassed, and does not exclude the addition of extra elements or objects. The terms "connected" and "coupled" and similar terms are not limited to direct or physical connections, but also include indirect and non-physical connections.

[0022] In some scenarios, such as in ore sorting, food sorting, garbage sorting, and the like, a material sorting machine identifies materials by taking images and sorts the materials according to their categories. The image taking requires an illuminating device to provide illumination to ensure the quality of the images taken. In some cases, the illuminating device can be covered with dust, which weakens the light emitted and fails to meet the illumination requirement, affecting the image quality. Especially in environments with a lot of dust, such as ore sorting, the illuminating device is affected more, which seriously affects the accuracy of classification and recognition, leading to sorting errors. In some related technologies, a mechanical brush or a scraper is installed to regularly wipe the surface of the light source to remove deposits, but the mechanical brush or the scraper needs to be cleaned regularly, which is low in production efficiency.

[0023] To overcome the problems in the related art, an example embodiment of the present disclosure provides a self-cleaning device, as shown inFigure 1 As shown, it is applied to an illumination device including a light source, wherein the self-cleaning device may include: a light-transmitting plate 100 and one or more nozzles 200.

[0024] 100mm light-transmitting panel, such as Figure 1 As shown, the light-transmitting plate 100 can be used to transmit light emitted from the light source 300. The light-transmitting plate 100 is flat. The shape of the light-transmitting plate 100 can be configured according to the light source 300; for example, if the light source is tubular, the light-transmitting plate 100 can be a long strip extending along the axial direction of the tube. The light-transmitting plate 100 can be positioned below the light source to allow light emitted from the light source 300 to pass through the light-transmitting plate 100 and provide downward illumination. The material can be acrylic, polycarbonate, etc., which allows most of the light to pass through effectively, reducing light absorption and loss, and has good light transmittance, thus improving the utilization efficiency of the light source. These materials have good chemical stability and corrosion resistance, and can withstand dust, moisture, and temperature changes in the environment. The outer surface of the light-transmitting panel 100 can be coated, such as with an anti-fouling coating or a hydrophilic coating. Through the surface structure and chemical properties of the coating, the adhesion between contaminants such as dirt, bacteria, and grease and the outer surface of the light-transmitting panel 100 is reduced, making it easier to wash away or prevent contaminants from adhering. This can prevent contaminants from adhering to the outer surface of the light-transmitting panel 100, which can not only reduce the frequency of maintenance and reduce cleaning costs and time, but also extend the service life of the light-transmitting panel 100 and prevent corrosion, scratches or other forms of aging of the light-transmitting panel 100.

[0025] One or more nozzles 200, such as Figure 1As shown, the nozzles 200 can be arranged at the side 110 of the light-transmitting plate 100 and can be used to spray liquid to the lower surface 120 of the light-transmitting plate 100 to clean the lower surface 120 of the light-transmitting plate 100. In the embodiment of the present disclosure, the light-transmitting plate 100 can be arranged below the light source 300, and the light emitted by the light source 300 can pass through the light-transmitting plate 100 and be emitted downward. On the other hand, dust that can exist below the light-transmitting plate 100 can adhere to the lower surface of the light-transmitting plate 100 and affect the lighting effect of the light emitted by the light source 300. The number of nozzles 200 can be one or more, and the number of nozzles can be determined according to the size and uniformity of the area that needs to be cleaned. Multiple nozzles can ensure uniform distribution of the liquid and achieve the effect of overall cleaning. One nozzle can be suitable for a situation where the range that needs to be cleaned is relatively small. The nozzles 200 can be arranged at the side 110 of the light-transmitting plate 100 and can be distributed along the edge of the light-transmitting plate 100. In some cases, the nozzles 200 can be arranged at one side of the light-transmitting plate 100. In other cases, multiple nozzles can be arranged at two sides of the light-transmitting plate 100. In the embodiment of the present disclosure, each nozzle sprays liquid toward the lower surface to clean the area in front of the nozzle 200. The light-transmitting plate 100 can be a long strip-shaped flat plate, and the lower surface can be a whole rectangle. The nozzles 200 can be arranged at the side of the long side of the rectangle, so that the distance that the liquid flows on the lower surface 120 of the light-transmitting plate 100 is reduced, the area that needs to be cleaned by the liquid sprayed by the nozzles 200 is reduced, and the cleaning effect is improved. The nozzles 200 can be arranged at the position of the oblique lower side of the light-transmitting plate 100, which can ensure that the liquid sprayed by the nozzles 200 can reach the position of the lower surface 120 of the light-transmitting plate 100. The nozzles 200 can be adjusted to appropriate angles and positions according to the inclination and surface area of the light-transmitting plate 100, which can effectively spray liquid to cover the lower surface 120 of the light-transmitting plate 100, so as to ensure that the liquid is uniformly distributed on the lower surface 120 of the light-transmitting plate 100. The material of the nozzles can be stainless steel, plastic, etc. Such materials have durability and can adapt to different types of liquid, such as water, chemical solvents, etc. They can also adapt to different working environments, such as high temperature, high pressure and corrosive environment, etc. The liquid sprayed by the nozzles 200 to the lower surface 120 of the light-transmitting plate 100 can have certain cleaning properties and can be water, a cleaning agent mixture or a solution with a surfactant. The impact force of the liquid can be used to wash away the dust, oil stains and other pollutants on the lower surface 120 of the light-transmitting plate 100, which can clean the lower surface 120 of the light-transmitting plate 100, maintain the light transmission of the light-transmitting plate 100 and ensure that the light emitted by the light source 300 can pass through smoothly. The nozzles 200 can be combined with an automatic control system and can be started according to a predetermined time or frequency. The cleaning frequency can be set according to the degree of pollution of the lower surface 120 of the light-transmitting plate 100 and can be once every 30 minutes to 60 minutes. The nozzles 200 can also be controlled to clean the light-transmitting plate 100 according to the image situation, such as when the image brightness is too dark.The liquid sprayed from nozzle 200 can be selected at an appropriate flow rate to ensure uniform distribution of the liquid and keep the light-transmitting plate 100 clean for a long time. The liquid sprayed from nozzle 200 can be a high-pressure liquid, which can quickly remove contaminants from the lower surface 120 of the light-transmitting plate 100 and prevent stubborn dirt caused by long-term accumulation.

[0026] like Figure 1 As shown, the lower surface 120 of the light-transmitting plate 100 can be tilted, causing the liquid sprayed by the nozzle 200 onto the lower surface 120 of the light-transmitting plate 100 to flow away from the nozzle 200. This allows the liquid sprayed by the nozzle 200 onto the lower surface 120 of the light-transmitting plate 100 to flow with gravity, ensuring that the liquid covers a larger area of ​​the lower surface 120 of the light-transmitting plate 100 and effectively removes dirt and impurities. When the liquid flows to the side away from the nozzle 200, the lower surface 120 of the light-transmitting plate 100 can be cleaned more thoroughly. This not only prevents some areas from being missed due to liquid stagnation but also helps prevent liquid from accumulating on the lower surface 120 of the light-transmitting plate 100, reducing the risk of water accumulation. In this embodiment, by tilting the lower surface 120 of the light-transmitting plate 100, the liquid sprayed by the nozzle 200 onto the lower surface 120 of the light-transmitting plate 100 can flow away from the nozzle 200, improving the cleaning effect and ensuring the illumination effect of the light source. In some embodiments, the tilt angle of the lower surface 120 of the light-transmitting plate 100 can be set to 3-10 degrees, that is, the angle between the lower surface 120 of the light-transmitting plate 100 and the horizontal plane (towards the nozzle 200) is 3-10 degrees, for example, it can be 5 degrees, so as to ensure that the liquid can flow to the opposite side of the lower surface 120 of the light-transmitting plate 100 and fall from the opposite side, thereby improving the cleaning effect.

[0027] In this embodiment of the present disclosure, one or more nozzles 200 may be provided on the side 110 of the light-transmitting plate 100. The nozzles 200 spray liquid onto the lower surface 120 of the light-transmitting plate 100 to clean the lower surface 120 of the light-transmitting plate 100, maintain the light transmittance of the light-transmitting plate 100, ensure that the light emitted by the light source can pass through smoothly, prevent the long-term accumulation of pollutants, keep the light source clean, facilitate observation, and ensure the quality and accuracy of the captured images.

[0028] In some embodiments, the lower surface 120 of the light-transmitting plate 100 can be provided with a hydrophilic layer for adsorbing the liquid sprayed by the nozzle 200. The hydrophilic layer on the lower surface 120 of the light-transmitting plate 100 can be sprayed or pasted. The hydrophilic layer can be a special coating material, such as a silica coating or a nano coating, which has good hydrophilicity and durability and can resist the influence of external environmental factors. The hydrophilic layer can quickly adsorb and diffuse the liquid sprayed by the nozzle 200, so that the liquid uniformly covers the lower surface 120 of the light-transmitting plate 100, forming a uniform water film on the lower surface 120 of the light-transmitting plate 100. The dust on the hydrophilic layer can move with the water film and eventually form droplets to be discharged by the drainage system. In the embodiments of the present disclosure, by providing the hydrophilic layer on the lower surface 120 of the light-transmitting plate 100, the adhesion of the liquid sprayed by the nozzle 200 is enhanced, so that the liquid can be uniformly distributed, the cleaning process is more efficient, and the maintenance cost is reduced.

[0029] In some embodiments, the liquid outlet 210 of the nozzle 200 can have a fan-shaped cross section for spraying liquid in a fan shape. In the embodiments of the present disclosure, the nozzle 200 has a liquid outlet 210 at one end, and the liquid is sprayed outward from the liquid outlet 210. The cross section of the liquid outlet 210 can have a fan-shaped surface, wherein the cross section can be a plane parallel to the liquid spraying direction and can be parallel to the horizontal plane or inclined at a certain angle in the spraying direction. In some embodiments, the fan-shaped surface of the liquid spraying can form a suitable angle with the horizontal plane, so that the liquid can be sprayed to the lower surface of the light-transmitting plate 100 to ensure that the dirt on the lower surface 120 of the light-transmitting plate 100 can be cleaned. The liquid sprayed by the liquid outlet 210 of the nozzle 200 in a fan shape can uniformly distribute the liquid in a larger range on the lower surface 120 of the light-transmitting plate 100 and cover more areas. The liquid sprayed by the nozzle 200 can be uniformly sprayed at a small flow rate, which can reduce the concentration of the liquid on the lower surface 120 of the light-transmitting plate 100 in some positions and prevent excessive cleaning or liquid waste in some positions. In the embodiments of the present disclosure, by setting the cross section of the liquid outlet 210 of the nozzle 200 to have a fan-shaped surface, the coverage range and uniformity of the liquid distribution can be improved, which facilitates to improve the cleaning effect.

[0030] In some embodiments, the fan angle of the liquid sprayed by the nozzle 200 can be 50-80 degrees. The fan angle of the liquid sprayed by the nozzle 200 can be adjusted as appropriate, and the fan angle of the nozzle 200 can be determined according to the size and uniformity of the area to be cleaned. A larger fan angle can not only ensure uniform distribution of the liquid and achieve comprehensive cleaning, but also reduce waste caused by concentrated spraying. A smaller fan angle can be suitable for situations where the area to be cleaned is relatively small. The fan angle can be 65 degrees, which can effectively improve the cleaning degree. In the embodiments of the present disclosure, by setting the fan angle of the liquid sprayed by the nozzle 200 to 50-80 degrees, the flexibility of cleaning coverage can be ensured, which is conducive to improving the cleaning degree and ensuring the lighting effect of the light-transmitting plate 100.

[0031] In some embodiments, as shown in FIG. 2, the self-cleaning device can include a plurality of nozzles 200, and the plurality of nozzles 200 can be arranged side by side with a spacing of 20-30 mm between adjacent nozzles. Figure 3 The plurality of nozzles 200 can be arranged side by side, which can cover a larger area of the lower surface 120 of the light-transmitting plate 100 and can reduce the cleaning time. The spacing between adjacent nozzles can be appropriately set. Too small spacing can cause over-cleaning of a specific area and waste of liquid, and too large spacing can cause some areas to be cleaned insufficiently. The spacing can be set to 20-30 mm, which can ensure uniform distribution of liquid spraying, avoid dead angles, and improve the cleaning effect. In the embodiments of the present disclosure, by arranging a plurality of nozzles 200 in the self-cleaning device and maintaining a spacing of 20-30 mm between adjacent nozzles, the uniformity of liquid spraying and the cleaning coverage can be significantly improved, which is conducive to improving the cleaning effect.

[0032] In some embodiments, the self-cleaning device can further include one or more gas injection ports arranged on the side of the light-transmitting plate 100 for injecting gas to the lower surface 120 of the light-transmitting plate 100. The self-cleaning device can be provided with gas injection ports for injecting gas to the lower surface 120 of the light-transmitting plate 100, which can blow off dust to achieve the purpose of cleaning, and can also quickly blow off and dry the liquid sprayed to the lower surface of the light-transmitting plate 100 for cleaning, so that the cleaning effect is better and the influence of liquid adhesion on light is avoided. The number of gas injection ports can be one or more, which can be determined according to the size and uniformity of the area to be cleaned. Multiple gas injection ports can ensure uniform distribution of gas to achieve the effect of comprehensive cleaning, and one gas injection port can be suitable for the case where the range to be cleaned is relatively small. In some embodiments, the gas injection ports can be arranged above the nozzles 200, below the nozzles 200, or side by side with the nozzles 200. The side-by-side arrangement of multiple gas injection ports can be staggered arrangement of multiple gas injection ports and multiple nozzles, or can be arranged side by side without limitation, which can ensure that gas and liquid can act alternately to form a more comprehensive spraying area and can avoid cleaning dead angles. In other embodiments, the gas injection ports can be arranged on the side opposite to the nozzles 200 of the light-transmitting plate 100 or on the side adjacent to the nozzles 200 of the light-transmitting plate 100 for convenient installation and space layout. The gas injected by the gas injection ports can improve the flowability of the liquid on the lower surface 120 of the light-transmitting plate 100, ensure that the liquid can better cover each area of the lower surface 120 of the light-transmitting plate 100, combine the pushing force of the gas and the flushing action of the liquid, and effectively remove the dirt attached to the lower surface 120 of the light-transmitting plate 100 to keep the light-transmitting plate 100 clean. In the embodiments of the present disclosure, by arranging the gas injection ports and arranging the gas injection ports and the nozzles 200 side by side, it can be ensured that the gas and the liquid can act alternately to form a more comprehensive spraying area, which can improve the efficiency and effect of the self-cleaning device and ensure the cleaning of the light-transmitting plate 100.

[0033] Based on the same inventive concept, the exemplary embodiments of the present disclosure also provide a lighting device, which comprises a light-transmitting plate and a self-cleaning device arranged on the light-transmitting plate, wherein the self-cleaning device comprises a nozzle array arranged on the light-transmitting plate for spraying liquid to the lower surface of the light-transmitting plate, and a gas injection port arranged on the side of the light-transmitting plate for injecting gas to the lower surface of the light-transmitting plate. Figure 2 、 Figure 3As shown, the lighting device may include: a bracket 400, a light source 300, and a self-cleaning device as described in any of the preceding embodiments. The bracket 400 can be used to fix the device. The light source 300, which can be mounted on the bracket 400, can be used to provide light. The light source 300 may be tubular, with both ends mounted on the bracket 400, and may be located above the light-transmitting plate 100, allowing light to pass through the light-transmitting plate 100 to provide illumination to the area below it. The light-transmitting plate 100 of the self-cleaning device may be disposed below the light source 300, and the side away from the nozzle 200 may be fixedly connected to the bracket 400; the nozzle 200 may be fixedly connected to the bracket 400. The side of the light-transmitting plate 100 away from the nozzle 200 may be fixedly connected to the bracket 400, and the section near the nozzle 200 forms an opening with the bracket 400, ensuring that the nozzle 200 can conveniently spray liquid onto the lower surface of the light-transmitting plate 100. In this embodiment of the disclosure, a lighting device is provided, which may include a bracket 400, a light source 300, and a self-cleaning device. The light-transmitting plate 100 and the nozzle 200 in the self-cleaning device are fixedly connected to the bracket 400, so that the self-cleaning device can perform efficient cleaning during operation.

[0034] In some embodiments, such as Figure 2 , Figure 3 As shown, the lighting device may further include a lampshade 500, which can be disposed above the light source 300 and fixedly connected to the bracket 400, for reflecting the light emitted by the light source 300. The lampshade 500, installed above the light source 300, can effectively reflect the light emitted by the light source 300, enhancing light utilization, improving the overall lighting effect, and protecting the light source 300 from dust and other external factors, thus extending the lifespan of the light source 300. The shape of the lampshade 500 can be configured according to the light source 300; for example, if the light source is tubular, the lampshade 500 can be a plate-like structure extending along the axial direction of the tube. The fixed connection between the lampshade 500 and the bracket 400 ensures the stability of the lampshade during use, making it less prone to movement and maintaining uniform illumination. The lampshade 500 can be made of a highly reflective material, such as aluminum alloy, to improve light reflection efficiency. In this embodiment, by providing a lampshade 500 in the lighting device, the light emitted by the light source 300 can be reflected, thereby improving the lighting effect of the light source.

[0035] In some embodiments, such as Figure 4As shown, the cross section of the lampshade 500 can be parabolic, and the light source 300 is arranged at the focal point of the parabolic cross section. The cross section of the lampshade 500 is parabolic, and the size and angle of the parabolic cross section can be adjusted according to the size and angle of the lampshade 500, which can uniformly distribute the light to the illumination area and improve the overall illumination effect. The light source 300 is arranged at the focal point of the parabolic cross section, which can effectively focus the light emitted by the light source 300 to a point, which can improve the brightness and intensity of the light and make the energy utilization of the light source 300 higher. In the embodiment of the present disclosure, by arranging the cross section of the lampshade 500 to be parabolic and arranging the light source 300 at the focal point of the parabolic cross section, the light emitted by the light source 300 can be effectively focused and reflected, which can improve the brightness and intensity of the light and improve the illumination effect.

[0036] The present application uses specific words to describe the embodiments of the present application. As "one embodiment", "an embodiment", and / or "some embodiments" means a certain feature, structure or characteristic related to at least one embodiment of the present application. Therefore, it should be emphasized and noted that the "an embodiment" or "one embodiment" or "an alternative embodiment" mentioned in different places in the specification does not necessarily refer to the same embodiment. In addition, some features, structures or characteristics in one or more embodiments of the present application can be properly combined.

[0037] In the context of the present application, unless the context clearly indicates otherwise, "a", "an", "one", and / or "the" do not mean to refer to the singular, but also include the plural. Generally speaking, the terms "comprise" and "include" only indicate the inclusion of the steps and elements explicitly identified, and these steps and elements do not constitute an exclusive list, and the method or device can also include other steps or elements.

[0038] Similarly, it should be noted that, in order to simplify the description of the present application and to help understand one or more embodiments of the present application, sometimes multiple features are combined into one embodiment, figure or description thereof in the foregoing description of embodiments of the present application. However, this method of disclosure does not mean that the features required by the present application are more than the features mentioned in the claims. In fact, the features of the embodiment are less than all the features of the disclosed single embodiment.

[0039] The above has described the basic concept, and it is obvious that the above disclosure is only an example and does not constitute a limitation on the present application for those skilled in the art. Although it is not explicitly stated here, those skilled in the art can make various modifications, improvements and corrections to the present application. Such modifications, improvements and corrections are suggested in the present application, so such modifications, improvements and corrections still belong to the spirit and scope of the embodiments of the present application.

Claims

1. A self-cleaning device applied to a lighting device comprising a light source, wherein, The application relates to a self-cleaning device and a lighting device. The self-cleaning device comprises: a light-transmitting plate for transmitting light emitted by a light source, the light-transmitting plate being a long strip-shaped flat plate, the lower surface of the light-transmitting plate being a whole rectangle, and the light-transmitting plate being arranged below the light source; one or more nozzles arranged on the side of the light-transmitting plate and used for spraying liquid to the lower surface of the light-transmitting plate to clean the lower surface of the light-transmitting plate, the nozzles being arranged on the obliquely lower side of the long side of the rectangle of the light-transmitting plate to ensure that the liquid sprayed by the nozzles can reach the lower surface of the light-transmitting plate; one or more air outlets arranged on the side of the light-transmitting plate and used for spraying gas to the lower surface of the light-transmitting plate; wherein the lower surface of the light-transmitting plate is arranged obliquely, so that the liquid sprayed by the nozzles to the lower surface of the light-transmitting plate flows to the side far away from the nozzles; 2. The self-cleaning device of claim 1, wherein, wherein the lower surface of the light-transmitting plate is provided with a hydrophilic layer for adsorbing the liquid sprayed by the nozzles.

3. The self-cleaning device of claim 1, wherein, The oblique angle of the lower surface of the light-transmitting plate is 3-10 degrees.

4. The self-cleaning device of claim 3, wherein, The cross section of the liquid outlet of the nozzle is a sectorial surface, so that the liquid sprayed by the nozzle is in a sectorial shape.

5. The self-cleaning device of claim 1, wherein, The sectorial angle of the liquid sprayed by the nozzle is 50-80 degrees.

6. An illumination device, wherein, The self-cleaning device comprises a plurality of nozzles, and the plurality of nozzles are arranged side by side and the interval between adjacent nozzles is 20-30 mm. The lighting device comprises: a support; a light source mounted on the support and used for providing light; The self-cleaning device according to any one of claims 1-5, wherein the light-transmitting plate is arranged below the light source, and the side far away from the nozzles is fixedly connected with the support; 7. The illumination device of claim 6, wherein, the nozzles are fixedly connected with the support. The lighting device further comprises:

8. The illumination device of claim 7, wherein, a lampshade arranged above the light source and fixedly connected with the support and used for reflecting the light emitted by the light source. The cross section of the lampshade is in a parabolic shape, and the light source is arranged at the focal point of the parabolic shape.

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