Photovoltaic panel cleaning equipment

Abstract

Photovoltaic panel cleaning equipment is used for cleaning a photovoltaic panel and comprises an unmanned aerial vehicle, a downward hanging device, a container, a controller and a spray head, the downward hanging device is connected with the unmanned aerial vehicle, the container is installed on the downward hanging device, the controller is used for controlling the pressure and flow of fluid output by the container, and the spray head is arranged on the downward hanging device and communicates with the container; the spraying head is used for spraying a gas-liquid mixture, the spraying angle of the spraying head is matched with the inclination angle of the photovoltaic panel, the liquid content Q1 and the gas content Q2 in the gas-liquid mixture sprayed by the spraying head per minute meet the following conditions: 0.1 < = Q2 / Q1 < = 0.5 and 0 < = Q1 < = 6L, the liquid consumption of the photovoltaic panel cleaning equipment is reduced, and the cleaning effect of the photovoltaic panel cleaning equipment is improved.

Description

Technical Field

[0001] The invention relates to the technical field of unmanned aerial vehicle (UAV) cleaning photovoltaic panels, and in particular to a photovoltaic panel cleaning device. Background Art

[0002] The power generation of photovoltaic power stations is affected by many external factors, and dust is the most important factor. Sandstorms, dust, air pollution, and vehicle traffic can cause dust accumulation on the surface of photovoltaic panels, leading to heat dissipation obstruction, local overheating, and chemical corrosion of photovoltaic panels. In the prior art, high-pressure water spraying and spray cleaning are usually used to remove dust from photovoltaic panels, which has the problems of high water consumption and poor cleaning effect. Summary of the invention

[0003] The purpose of the present invention is to provide a photovoltaic panel cleaning device to solve the problem that the conventional techniques of removing dust from photovoltaic panels by means of high-pressure water spraying and spray cleaning have large water consumption and poor cleaning effect.

[0004] To achieve the purpose of the present invention, the present invention provides the following technical solutions:

[0005] The present invention provides a photovoltaic panel cleaning device for cleaning photovoltaic panels, the photovoltaic panel cleaning device comprising: an unmanned aerial vehicle; a hanging device connected to the unmanned aerial vehicle; a container installed on the hanging device; a controller for controlling the pressure and flow rate of a fluid output by the container; a nozzle arranged on the hanging device, the nozzle being connected to the container, the nozzle being used to spray a gas-liquid mixture, the spraying angle of the nozzle being adapted to the inclination angle of the photovoltaic panel; wherein the liquid content in the gas-liquid mixture sprayed by the nozzle per minute is Q1, and the gas content is Q2, satisfying the following: 0.1≤Q2 / Q1≤0.5, 0≤Q1≤6L.

[0006] In one embodiment, the nozzle includes a nozzle, the nozzle has an injection channel, the injection channel runs through the nozzle in a first direction, the injection channel includes a first section, a second section and a third section arranged in sequence in the first direction, the first section is connected to the container, the second section extends along the first direction, and the first section and the third section are both flared; the angle between the extension direction of the inner circumferential wall of the first section and the first direction is C1, satisfying: 7.5°≤C1≤45°, the angle between the extension direction of the inner circumferential wall of the third section and the first direction is C2, satisfying: 45°≤C2≤50°.

[0007] In one embodiment, the third section includes a plurality of mutually isolated sub-channels, the plurality of sub-channels are evenly distributed in the circumferential direction of the nozzle, the same end of the plurality of sub-channels in the first direction are connected to the second section, and the spacing distance between the plurality of sub-channels gradually increases from the first section to the third section.

[0008] In one embodiment, the nozzle also includes a mounting tube, which is connected to the lower hanging device, and the mounting tube has a mounting cavity, which is communicated with the container, and the mounting tube also has a mounting port at one end in the first direction, and the nozzle is used to extend from the mounting port into the mounting cavity and be sealed and connected to the mounting tube, and the first section is communicated with the mounting cavity.

[0009] In one embodiment, the container includes a liquid tank and a gas tank, and the mounting tube also has a first interface and a second interface, the first interface connects the mounting cavity and the liquid tank, and the second interface connects the mounting cavity and the gas tank; the nozzle also includes a mixing tube, the mixing tube is accommodated in the mounting cavity, one end of the mixing tube in the first direction is sealed connected to the mounting tube, and the other end is sealed connected to the nozzle, the mixing tube has a mixing chamber, the mixing chamber is connected to the first interface, the second interface and the first section, and the mixing chamber is used to produce a gas-liquid mixture.

[0010] In one embodiment, the first interface is located on a side of the mixing tube away from the nozzle in the first direction, and the second interface is located on a side of the outer circumference of the mixing tube; the mixing chamber passes through the mixing tube in the first direction and has a first opening and a second opening, the first opening is connected to the first interface, and the second opening is connected to the first section; the outer wall of the mixing tube is also provided with a plurality of through holes, and the plurality of through holes are evenly distributed in the circumferential direction of the mixing tube and in the first direction, and the plurality of through holes connect the second interface and the mixing chamber, the first opening is used for liquid to enter the mixing chamber, and the through holes are used for gas to enter the mixing chamber.

[0011] In one embodiment, the nozzle also includes a first joint and a second joint, both of which are one-way valves, one end of the first joint extends into the first interface and is sealed and connected to the mounting tube, the other end of the first joint is connected to the liquid tank, one end of the second joint extends into the second interface and is sealed and connected to the mounting tube, and the other end of the second joint is connected to the gas tank.

[0012] In one embodiment, there are multiple nozzles, and the multiple nozzles are evenly distributed on the hanging device, and the controller is used to control the multiple nozzles to work simultaneously or alternately.

[0013] In one embodiment, the photovoltaic panel cleaning equipment also includes a detection member and a first rotating mechanism, the detection member is installed on the drone or the hanging device, the detection member is electrically connected to the controller, the first rotating mechanism is installed on the hanging device and connected to the nozzle; the photovoltaic panel has a plurality of areas to be cleaned arranged in an array, the detection member is used to detect the degree of contamination of the plurality of areas to be cleaned, the controller is used to control the first rotating mechanism to drive the nozzle to rotate around the first axis and / or the second axis, so that the spray angle of the nozzle is adapted to the inclination angle of the photovoltaic panel, and the nozzle sprays a gas-liquid mixture to at least one of the areas to be cleaned, and the second axis intersects with the first axis.

[0014] In one embodiment, the lower hanging device includes a second rotating mechanism, a third rotating mechanism, a first connecting arm and a second connecting arm, the second rotating mechanism is installed on the drone, one end of the first connecting arm is connected to the second rotating mechanism, the other end of the first connecting arm is connected to the third rotating mechanism, the second connecting arm is connected to the third rotating mechanism, and the first rotating mechanism is installed on the second connecting arm; the second rotating mechanism and the third rotating mechanism are both electrically connected to the controller, the detection member is also used to detect the angle between the second connecting arm and the photovoltaic panel, the second rotating mechanism is used to drive the first connecting arm to rotate around a third axis, and the third rotating mechanism is used to drive the second connecting arm to rotate around a fourth axis, so that the spray angle of the nozzle is adapted to the inclination angle of the photovoltaic panel, the third axis intersects with the fourth axis and the length direction of the first connecting arm, and the fourth axis intersects with the first axis and the second axis.

[0015] A nozzle is connected to a container and is used to spray a gas-liquid mixture. The spray angle of the nozzle is adapted to the inclination angle of the photovoltaic panel, and the controller can change the flow rate and gas-liquid ratio of the gas-liquid mixture by controlling the pressure and flow rate of the output fluid of the container. The photovoltaic panel cleaning equipment can reduce the liquid consumption of the photovoltaic panel cleaning equipment and improve the cleaning effect of the photovoltaic panel cleaning equipment by changing the spray angle of the nozzle and the flow rate and gas-liquid ratio of the gas-liquid mixture when cleaning the photovoltaic panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1is a structural diagram of a photovoltaic panel cleaning device according to an embodiment;

[0018] Figure 2 is a structural diagram of a first nozzle or a second nozzle of an embodiment;

[0019] Figure 3 is a cross-sectional view of a first nozzle of an embodiment;

[0020] Figure 4 is a cross-sectional view of a second nozzle of an embodiment;

[0021] Figure 5 is a cross-sectional view of a third nozzle of an embodiment;

[0022] Figure 6 is a cross-sectional view of a fourth nozzle of an embodiment;

[0023] Figure 7 is a structural diagram of a third nozzle or a fourth nozzle of an embodiment;

[0024] Figure 8 is a structural diagram of a nozzle of an embodiment;

[0025] Fig. 9 is an exploded view of a nozzle of an embodiment;

[0026] Fig.10 is a cross-sectional view of a nozzle according to an embodiment.

[0027] Description of reference numerals:

[0028] 1000- Photovoltaic panel cleaning equipment;

[0029] 100-Sprinkler;

[0030] 10-nozzle, 11-injection channel, 111-first section, 112-second section, 113-third section, 1131-sub-channel, 12-first groove, 13-second groove, P1-first nozzle, P2-second nozzle, P3-third nozzle, P4-fourth nozzle;

[0031] 20-installation tube, 21-installation cavity, 211-first cavity, 212-second cavity, 213-third cavity, 22-installation port, 23-first interface, 24-second interface;

[0032] 30 - mixing tube, 31 - mixing chamber, 32 - tube body, 33 - protrusion, 34 - first opening, 35 - second opening, 36 - through hole;

[0033] 40-first sealing ring;

[0034] 50- second sealing ring;

[0035] 60-first joint;

[0036] 70- second connector;

[0037] 200-UAV;

[0038] 300-underhanging device, 301-second rotating mechanism, 3011-fourth mounting member, 3012-third driving member, 302-third rotating mechanism, 3021-fourth driving member, 303-first connecting arm, 304-second connecting arm, 305-mounting bracket, 306-landing gear;

[0039] 400-container, 401-liquid tank, 402-gas tank;

[0040] 500-first rotating mechanism, 501-first mounting member, 502-second mounting member, 503-third mounting member, 504-first driving member, 505-guide groove, 506-limiting member;

[0041] L1-first axis, L2-second axis, L3-third axis, L4-fourth axis;

[0042] X-first direction, Y-front and rear direction of the photovoltaic panel cleaning device, Z-left and right direction of the photovoltaic panel cleaning device. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there can be a central component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there can be a central component at the same time.

[0045] Unless otherwise defined, all technical and scientific terms used in the present invention have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used 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 in the present invention includes any and all combinations of one or more of the related listed items.

[0046] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0047] Please refer to Figure 1 The present invention provides a photovoltaic panel cleaning device 1000 for cleaning photovoltaic panels. The photovoltaic panel cleaning device 1000 includes a drone 200, a hanging device 300, a container 400, a controller and a nozzle 100. The hanging device 300 is connected to the drone 200, and the container 400 is installed on the hanging device 300. The controller is used to control the pressure and flow rate of the fluid output by the container 400. The nozzle 100 is arranged on the hanging device 300, and the nozzle 100 is connected to the container 400. The nozzle 100 is used to spray a gas-liquid mixture. The spray angle of the nozzle 100 is adapted to the inclination angle of the photovoltaic panel, wherein the liquid content in the gas-liquid mixture sprayed by the nozzle 100 per minute is Q1, and the gas content is Q2, which satisfies: 0.1≤Q2 / Q1≤0.5, 0≤Q1≤6L (liters).

[0048] Photovoltaic panels, also known as solar panels, are important components in solar photovoltaic power generation systems. Photovoltaic panels are power generation devices that generate direct current when exposed to sunlight. They are mainly composed of thin solid photovoltaic cells made almost entirely of semiconductor materials (such as silicon). They use the photovoltaic effect of solar cell semiconductor materials to directly convert solar radiation energy into electrical energy. In order to increase the actual area of ​​photovoltaic panels that receive light and reduce the difficulty of the manufacturing process of photovoltaic panels, the surface of photovoltaic panels that receive light is usually a smooth plane.

[0049] Optionally, the drone 200 is used to drive the photovoltaic panel cleaning device 1000 to move above the photovoltaic panel and keep it suspended or moving. At the same time, the drone 200 can also drive the photovoltaic panel cleaning device 1000 to rotate as a whole relative to the photovoltaic panel in any direction to change the angle between the spray angle of the nozzle 100 and the inclination angle of the photovoltaic panel and the distance between the nozzle 100 and the photovoltaic panel.

[0050] Optionally, the gas-liquid mixture sprayed from the nozzle 100 is in a cone shape, and the cone has a rotationally symmetrical center line, and the extension direction of the rotationally symmetrical center line is the spray angle of the nozzle 100, and the spray angle of the nozzle 100 and the tilt angle of the photovoltaic panel are the angles between the rotationally symmetrical center line and the photovoltaic panel. Optionally, the photovoltaic panel cleaning device 1000 provided by the present invention can change the spray angle of the nozzle 100 by moving and rotating the drone 200, and can also change the spray angle of the nozzle 100 by driving the nozzle 100 to rotate relative to the lower hanging device 300 through a driving motor or other structures, without limitation.

[0051] Specifically, the spray angle of the nozzle 100 and the tilt angle of the photovoltaic panel can be 30°-90°, specifically 30°, 45°, 60° and 90°, etc., without limitation. Optionally, under the premise that the distance between the nozzle 100 and the photovoltaic panel remains unchanged, when the spray angle of the nozzle 100 and the tilt angle of the photovoltaic panel are 90°, the contour shape of the gas-liquid mixture covering the photovoltaic panel is roughly circular (excluding the sputtering caused by the contact between the gas-liquid mixture and the photovoltaic panel). At this time, the gas-liquid mixture has a strong impact force on the photovoltaic panel, but the cleaning range is small, which is suitable for cleaning stains with strong adhesion on the photovoltaic panel, including dust, mud, water stains and mud stains. When the spray angle of the nozzle 100 and the tilt angle of the photovoltaic panel are 30°, the contour shape of the gas-liquid mixture covering the photovoltaic panel is roughly elliptical (excluding the sputtering caused by the contact between the gas-liquid mixture and the photovoltaic panel). At this time, the impact force of the gas-liquid mixture on the photovoltaic panel is weak, but the cleaning range is large, and the effect of flushing away the pollutants on the photovoltaic panel is better. It is suitable for cleaning stains with less adhesion and larger solid particles on the photovoltaic panel, including sand, dust and plastic. Optionally, in the process of increasing the spray angle of the nozzle 100 and the tilt angle of the photovoltaic panel from 30° to 90°, the impact force of the gas-liquid mixture on the photovoltaic panel gradually increases, the cleaning range gradually decreases, and the ability to flush pollutants away from the photovoltaic panel gradually weakens. The photovoltaic panel cleaning device 1000 provided by the present invention can select different spray angles to clean the photovoltaic panel according to the pollution situation on the photovoltaic panel, so as to achieve a better cleaning effect while reducing liquid consumption and improving cleaning efficiency.

[0052] Optionally, an electric-controlled valve is provided at the output end of the container 400, and the container 400 is connected to the nozzle 100 through the electric-controlled valve and a pipeline. The controller is electrically connected to the electric-controlled valve, and the controller changes the pressure and flow of the fluid output from the container 400 by controlling the electric-controlled valve.

[0053] Specifically, the liquid content in the gas-liquid mixture sprayed out by the nozzle 100 per minute is Q1, and the gas content is Q2, that is, the nozzle 100 sprays (Q1+Q2)L of gas-liquid mixture per minute, and has Q1L of liquid and Q2L of gas, the ratio of the gas content to the liquid content is between 0.1 and 0.5, and the maximum liquid content is 6L.

[0054] When Q1=0L and Q2≠0, that is, the nozzle 100 only sprays gas, at this time, the photovoltaic panel cleaning device 1000 is suitable for cleaning stains with less adhesion and larger solid particles on the photovoltaic panel, including dust, sand and plastic, etc., to reduce liquid consumption. When Q1=6L and Q2≠0, the water content of the gas-liquid mixture sprayed by the nozzle 100 reaches the maximum preset value. At this time, the photovoltaic panel cleaning device 1000 is suitable for cleaning stains with less adhesion and larger solid particles on the photovoltaic panel, as well as cleaning stains with greater adhesion on the photovoltaic panel, including dust, sand, mud, water stains, mud stains and plastic, etc. In the process of Q1 increasing from 0L to 6L, the cleaning intensity of the photovoltaic panel cleaning device 1000 on the stains on the photovoltaic panel gradually increases. The photovoltaic panel cleaning device 1000 can select different liquid contents of the gas-liquid mixture according to the pollution conditions on the photovoltaic panel to achieve a better cleaning effect while reducing liquid consumption and improving cleaning efficiency.

[0055] When Q1≠0, Q1 is constant, and Q2 / Q1=0.1, the liquid content in the gas-liquid mixture reaches the maximum preset value, and the gas content reaches the minimum preset value. Since the mass of the gas-liquid mixture sprayed out per minute is large and the pressure is small, the effective spray distance of the gas-liquid mixture sprayed out by the nozzle 100 is short, but the impact force on the photovoltaic panel within the effective spray distance is strong, which is suitable for cleaning stains with large adhesion on the photovoltaic panel, including dust, sand, mud, water stains, mud stains and plastics. When Q1≠0, Q1 is constant, and Q2 / Q1=0.5, the liquid content in the gas-liquid mixture reaches the minimum preset value, and the gas content reaches the maximum preset value. Since the mass of the gas-liquid mixture sprayed out per minute is small and the pressure is large, the effective spray distance of the gas-liquid mixture sprayed out by the nozzle 100 is long, but the impact force on the photovoltaic panel within the effective spray distance is weak, which is suitable for cleaning stains with small adhesion and large solid particles on the photovoltaic panel, including sand, dust and plastics. The photovoltaic panel cleaning device 1000 can select different gas-liquid content ratios of the gas-liquid mixture according to the pollution conditions on the photovoltaic panel, so as to achieve a better cleaning effect while reducing liquid consumption and improving cleaning efficiency.

[0056] In a specific embodiment, in order to ensure that the gas-liquid mixture sprayed by the nozzle 100 has an effective cleaning distance and impact force that meet the requirements of the cleaning operation and does not exceed the maximum load of the drone 200, the container 400 includes a liquid tank 401 and a gas tank 402, wherein the liquid tank 401 is loaded with 50L of liquid, the gas tank has a volume of 15L and is loaded with gas at a pressure of 35MPa, and the nozzle 100 can spray Q1=4.8L, Q2=1.44L (ie, Q2 / Q1=0.3) of the gas-liquid mixture per minute, and a single nozzle 100 can continuously spray the gas-liquid mixture for 10 minutes, so as to achieve a better cleaning effect while reducing liquid consumption and improving cleaning efficiency.

[0057] Optionally, the drone 200 can drive the nozzle 100 to stay above the photovoltaic panel for fixed-point cleaning for a longer duration, which is suitable for removing pollutants with strong adhesion on the photovoltaic panel. The drone 200 can also drive the nozzle 100 to move continuously above the photovoltaic panel. The nozzle 100 continuously or intermittently sprays a gas-liquid mixture during the movement to perform a large-scale cleaning operation on the photovoltaic panel, which is suitable for removing pollutants with less adhesion on the photovoltaic panel and situations where the pollutants on the photovoltaic panel are relatively dispersed.

[0058] Optionally, the container 400 may directly output a gas-liquid mixture to the nozzle 100, or may output a liquid and a gas to the nozzle 100 separately, and the liquid and the gas are mixed in the nozzle 100 to form a gas-liquid mixture, without limitation. Optionally, the liquid in the gas-liquid mixture may be water, a solution of a detergent and water, etc., and the gas in the gas-liquid mixture may be air, argon, helium, nitrogen, etc., without limitation.

[0059] By setting the nozzle 100 to be connected with the container 400 and used to spray the gas-liquid mixture, the spray angle of the nozzle 100 is adapted to the inclination angle of the photovoltaic panel, and the controller can change the flow rate and gas-liquid ratio of the gas-liquid mixture by controlling the pressure and flow rate of the fluid output from the container 400, so that the photovoltaic panel cleaning device 1000 can change the spray angle of the nozzle 100 and the flow rate and gas-liquid ratio of the gas-liquid mixture when cleaning the photovoltaic panel, thereby reducing the liquid consumption of the photovoltaic panel cleaning device 1000 and improving the cleaning effect of the photovoltaic panel cleaning device 1000.

[0060] Please refer to Figures 2 to 6 The nozzle 100 includes a nozzle 10, and the nozzle 10 has an injection channel 11. The injection channel 11 runs through the nozzle 10 in a first direction X. The injection channel 11 includes a first section 111, a second section 112 and a third section 113 arranged in sequence in the first direction X. The first section 111 is connected to the container 400, and the second section 112 extends along the first direction X. The first section 111 and the third section 113 are both flared. The angle between the extension direction of the inner circumferential wall of the first section 111 and the first direction X is C1, which satisfies: 7.5°≤C1≤45°. The angle between the extension direction of the inner circumferential wall of the third section 113 and the first direction X is C2, which satisfies: 45°≤C2≤50°.

[0061] Optionally, in the cross section of the nozzle 10 at any position on the first direction X, the contour shapes of the first section 111, the second section 112 and the third section 113 are all circular, elliptical, triangular and rectangular, etc., without limitation. Specifically, in the cross section of the nozzle 10 at any position on the first direction X, the contour shapes of the first section 111, the second section 112 and the third section 113 are all circular, so that the shape of the gas-liquid mixture sprayed from the nozzle 10 is conical, so that the distance between the nozzle 10 and the photovoltaic panel remains unchanged, and when the spray angle of the nozzle 10 remains unchanged, the coverage of the gas-liquid mixture on the photovoltaic panel is maximized. Optionally, in the cross section perpendicular to the first direction X, the inner wall surfaces of the first section 111, the second section 112 and the third section 113 are all straight lines, so as to reduce the resistance of the gas-liquid mixture in the spray channel 11.

[0062] Optionally, the maximum inner diameter of the first section 111 is D1, the inner diameter of the second section 112 is D2, and the maximum inner diameter of the third section 113 is D3, satisfying: D1=D3, D1 and D3 are both greater than D2, so that in the process of the gas-liquid mixture entering the second section 112 from the first section 111, the gas-liquid mixture is gradually further compressed in the first section 111, thereby increasing the spraying speed of the gas-liquid mixture, thereby improving the cleaning ability of the gas-liquid mixture, and at the same time, in the process of the gas-liquid mixture entering the third section 113 from the second section 112 and being sprayed, the gas-liquid mixture can be sprayed in a conical shape under the restriction of the inner circumferential wall of the third section 113, so that the shape of the gas-liquid mixture sprayed from the nozzle 10 is conical, so that when the distance between the nozzle 10 and the photovoltaic panel remains unchanged, and the spraying angle of the nozzle 10 remains unchanged, the coverage range of the gas-liquid mixture on the photovoltaic panel is maximized.

[0063] In a specific embodiment, please refer to Figure 3 , Figure 3 The first nozzle P1 is shown. The first nozzle P1 has C1=C2=45°, D1=D3 and D1 / D2=D3 / D2=2, that is, the first section 111 and the third section 113 are symmetrically arranged relative to the second section 112. Since the first section 111 and the third section 113 are shorter in the first direction X and the second section 112 is longer in the first direction X, the gas-liquid mixture can be quickly compressed in the first section 111 and enter the second section 112 with a faster flow rate, thereby reducing the residence time of the gas-liquid mixture in the injection channel 11, which is beneficial to reducing the speed loss of the gas-liquid mixture in the injection channel 11 and improving the cleaning effect.

[0064] In another specific embodiment, please refer to Figure 4 , Figure 4The second nozzle P2 is shown, and the second nozzle P2 has C1=7.5°, C2=45°, 2<D1 / D2<3, and 5<D3 / D2<6. Since the length of the first section 111 in the first direction X is longer, and the lengths of the second section 112 and the third section 113 in the first direction X are shorter, the gas-liquid mixture is compressed while moving in the first section 111, and is mixed evenly under the restriction of the inner circumferential wall of the first section 111, and is quickly ejected through the second section 112 and the third section 113. The photovoltaic panel cleaning device 1000 can select the first nozzle P1 or the second nozzle P2 to clean the photovoltaic panel according to the pollution on the photovoltaic panel, so as to achieve a better cleaning effect while reducing the liquid consumption and improving the cleaning efficiency.

[0065] Optionally, when D1 / D2 of the nozzle 10 remains unchanged, the larger C1 is, the shorter the length of the first section 111 in the first direction X is, the shorter the time the gas-liquid mixture stays in the injection channel 11 is, the less the velocity loss of the gas-liquid mixture in the injection channel 11 is, and the stronger the impact force of the gas-liquid mixture on the photovoltaic panel is; the smaller C1 is, the longer the length of the first section 111 in the first direction X is, the longer the gas-liquid mixture stays in the injection channel 11 is, and the gas-liquid mixture is beneficial to the uniform mixing of the gas-liquid mixture in the injection channel 11.

[0066] Optionally, the coverage of the gas-liquid mixture on the photovoltaic panel can be changed by changing the angle of C2. When the distance between the nozzle 10 and the photovoltaic panel remains unchanged, the smaller the C2, the smaller the coverage of the gas-liquid mixture on the photovoltaic panel, but the longer the effective spray distance of the gas-liquid mixture, the more gas-liquid mixture is received per unit area of ​​the photovoltaic panel, and the faster and more powerful the removal of pollutants on the photovoltaic panel; the larger the C2, the larger the coverage of the gas-liquid mixture on the photovoltaic panel, but the shorter the effective spray distance of the gas-liquid mixture, the less gas-liquid mixture is received per unit area of ​​the photovoltaic panel, which is suitable for large-scale cleaning of photovoltaic panels. Specifically, C2 can be 45°, 46°, 47°, 48°, 49°, 50°, etc., without limitation.

[0067] By setting the nozzle 10, the nozzle 10 has a spray channel 11, the spray channel 11 penetrates the nozzle 10 in the first direction X, and the spray channel 11 includes a first section 111, a second section 112 and a third section 113 sequentially arranged in the first direction X. The first section 111 is connected to the container 400, and the second section 112 extends along the first direction X. The first section 111 and the third section 113 are both flared. The angle between the extension direction of the inner circumferential wall of the first section 111 and the first direction X is C1, which satisfies: 7.5°≤C1≤45°, and the angle between the extension direction of the inner circumferential wall of the third section 113 and the first direction X is C2, which satisfies: 45°≤C2≤50°, so that the gas-liquid mixture can be compressed under the restriction of the inner circumferential wall surface of the first section 111 when moving from the first section 111 to the second section 112, so as to increase the spraying speed of the gas-liquid mixture, and at the same time, the gas-liquid mixture is sprayed in a preset shape under the restriction of the inner circumferential wall surface of the third section 113 to adapt to different cleaning requirements.

[0068] Please refer to Figures 5 to 7 The third section 113 includes a plurality of mutually isolated sub-channels 1131, and the plurality of sub-channels 1131 are evenly distributed in the circumferential direction of the nozzle 10. The same end of the plurality of sub-channels 1131 in the first direction X is connected to the second section 112. From the direction from the first section 111 to the third section 113, the spacing distance between the plurality of sub-channels 1131 gradually increases.

[0069] The gas-liquid mixture passes through the second section 112 and enters the multiple sub-channels 1131 of the third section 113 and is ejected. The gas-liquid mixture ejected from each sub-channel 1131 moves approximately in a straight line and is cylindrical. Since the inner diameter of each sub-channel 1131 is smaller than the maximum inner diameter of the third section 113, compared with the gas-liquid mixture ejected from the first nozzle P1 and the second nozzle P2, the gas-liquid mixture ejected from each sub-channel 1131 has a faster ejection speed and a stronger impact force on the photovoltaic panel, and is suitable for cleaning stains with greater adhesion on the photovoltaic panel, including dust, mud, water stains, mud stains, etc., and has a larger coverage area.

[0070] In a specific embodiment, please refer to Figure 5 , Figure 5 The third nozzle P3 is shown, and C1=45°, C2=50°, and D1 / D2=2 of the third nozzle P3. In order to ensure that each sub-channel 1131 has an inner diameter that meets the preset requirements so that the nozzle 10 can spray enough gas-liquid mixture, D3 / D2>2. Optionally, the inner peripheral wall of each sub-channel 1131 extends in a straight line, and the angle between any two sub-channels 1131 arranged opposite to each other in the radial direction of the second section 112 is 100°.

[0071] In another specific embodiment, please refer to Figure 6 , Figure 6The fourth nozzle P4 is shown. The structure of the fourth nozzle P4 is similar to that of the third nozzle P3. The difference is that C1 of the fourth nozzle P4 is 7.5°. The photovoltaic panel cleaning equipment 1000 can select the third nozzle P3 or the fourth nozzle P4 to clean the photovoltaic panel according to the contamination condition on the photovoltaic panel, so as to achieve a better cleaning effect while reducing liquid consumption and improving cleaning efficiency.

[0072] In addition, the photovoltaic panel cleaning device 1000 also includes a conversion device, which is installed on the lower hanging device 300. The first nozzle P1, the second nozzle P2, the third nozzle P3 and the fourth nozzle P4 are all pre-installed on the conversion device. The conversion device can select different nozzles 10 to connect the aforementioned container 400 according to the pollution conditions on the photovoltaic panel. Specifically, the conversion device includes a fixed part, a driving part and a rotating part. The fixed part is connected to the lower hanging device 300, and the driving part connects the fixed part and the rotating part. The first nozzle P1, the second nozzle P2, the third nozzle P3 and the fourth nozzle P4 are all installed on the rotating part. The driving part is used to drive the rotating part to rotate relative to the fixed part to realize the switching between the first nozzle P1, the second nozzle P2, the third nozzle P3 and the fourth nozzle P4.

[0073] By setting the third section 113 to include a plurality of mutually isolated sub-channels 1131, the plurality of sub-channels 1131 are evenly distributed in the circumferential direction of the nozzle 10, and the same end of the plurality of sub-channels 1131 in the first direction X is connected to the second section 112. From the direction from the first section 111 to the third section 113, the spacing distance between the plurality of sub-channels 1131 gradually increases, so that the gas-liquid mixture sprayed out from the nozzle 10 has an impact force that meets the cleaning requirements, and also improves the cleaning range of the gas-liquid mixture on the photovoltaic panel.

[0074] Please refer to Figures 8 to 10 The nozzle 100 also includes a mounting tube 20, which is connected to the lower hanging device 300. The mounting tube 20 has a mounting cavity 21, which is connected to the container 400. The mounting tube 20 also has a mounting port 22 at one end in the first direction X. The nozzle 10 is used to extend from the mounting port 22 into the mounting cavity 21 and be sealed and connected to the mounting tube 20. The first section 111 is connected to the mounting cavity 21.

[0075] Optionally, the container 400 may directly output a gas-liquid mixture to the installation cavity 21 , or may output liquid and gas to the installation cavity 21 separately, and the liquid and gas may be mixed in the installation cavity 21 and / or the injection channel 11 to form a gas-liquid mixture, without limitation.

[0076] Exemplarily, the mounting tube 20 is threadedly connected to the nozzle 10, that is, the inner peripheral wall surface of the mounting cavity 21 is provided at the mounting opening 22, and the outer peripheral surface of the portion of the nozzle 10 that is used to extend into the mounting cavity 21 is provided with mutually matching threads. Optionally, the mounting tube 20 and the nozzle 10 threads can also be connected and fixed by means of clamping, riveting, magnetic attraction, etc., without limitation.

[0077] Optionally, the outer circumferential surface of the nozzle 10 is provided with a first groove 12, and the first groove 12 extends along the circumference of the nozzle 10. The nozzle 100 also includes a first sealing ring 40, which is sleeved on the nozzle 10 and located in the first groove 12. When the nozzle 10 is connected to the mounting tube 20, the first sealing ring 40 abuts against the bottom wall of the first groove 12 and the inner wall of the mounting cavity 21 to achieve a sealed connection. Optionally, the first nozzle P1, the second nozzle P2, the third nozzle P3 and the fourth nozzle P4 can be connected to the container 400 by connecting to the mounting tube 20, so that when the nozzle 10 is replaced, there is no need to disassemble and connect the nozzle 10 and the container 400, which reduces the difficulty of installing the nozzle 10.

[0078] By setting a mounting tube 20, the mounting tube 20 is connected to the lower hanging device 300, and the mounting tube 20 has a mounting cavity 21, and the mounting cavity 21 is connected to the container 400. The mounting tube 20 also has a mounting port 22 at one end in the first direction X. The nozzle 10 is used to extend from the mounting port 22 into the mounting cavity 21 and be sealed and connected to the mounting tube 20. The first section 111 is connected to the mounting cavity 21, so that the connection between the nozzle 10 and the lower hanging device 300 is more stable, and the gas-liquid mixture can be transported to the injection channel 11 through the mounting cavity 21, so that the gas-liquid mixture can be more fully mixed in the nozzle 100, thereby improving the cleaning ability of the photovoltaic panel cleaning equipment 1000.

[0079] Please refer to Figures 8 to 10 Combined with Figure 1 The container 400 includes a liquid tank 401 and a gas tank 402. The mounting tube 20 also has a first interface 23 and a second interface 24. The first interface 23 connects the mounting cavity 21 and the liquid tank 401, and the second interface 24 connects the mounting cavity 21 and the gas tank 402. The nozzle 100 also includes a mixing tube 30. The mixing tube 30 is accommodated in the mounting cavity 21. One end of the mixing tube 30 in the first direction X is sealedly connected to the mounting tube 20, and the other end is sealedly connected to the nozzle 10. The mixing tube 30 has a mixing chamber 31. The mixing chamber 31 is connected to the first interface 23, the second interface 24 and the first section 111. The mixing chamber 31 is used to generate a gas-liquid mixture.

[0080] Optionally, the liquid tank 401 is used to input liquid into the installation chamber 21 through the first interface 23, and the gas tank 402 is used to input gas into the installation chamber 21 through the second interface 24. The liquid and gas in the installation chamber 21 enter the mixing chamber 31 to mix and form a gas-liquid mixture, and the gas-liquid mixture enters the injection channel 11 from the mixing chamber 31. The volume of the mixing chamber 31 is smaller than the volume of the installation chamber 21, so that the liquid and the liquid are mixed more evenly in the mixing chamber 31 without causing a pressure drop.

[0081] Optionally, a second groove 13 is further provided on the end surface of the nozzle 10 facing the mixing tube 30, and the second groove 13 extends along the circumference of the nozzle 10. The nozzle 100 also includes a second sealing ring 50, which is sleeved on the nozzle 10 and located in the second groove 13. When the nozzle 10 is connected to the mounting tube 20 and the mixing tube 30, the second sealing ring 50 abuts against the bottom wall surfaces of the mixing tube 30 and the second groove 13 to achieve a sealed connection between the nozzle 10 and the mixing tube 30.

[0082] Optionally, the mixing tube 30 includes a tube body 32 and a protrusion 33, wherein the protrusion 33 is connected to one end of the tube body 32 close to the nozzle 10 and protrudes from the outer peripheral surface of the tube body 32, and the end surface of the protrusion 33 away from the tube body 32 in the first direction X abuts against the second sealing ring 50, and the protrusion 33 can be used to determine the installation direction of the mixing tube 30 when installing the mixing tube 30, so as to prevent the mixing tube 30 from being incorrectly installed. Optionally, the mixing tube 30 is a three-way tube having three openings connected to the mixing chamber 31, wherein one opening is used for liquid to enter the mixing chamber 31, another opening is used for gas to enter the mixing chamber 31, and the third opening is connected to the injection channel 11.

[0083] By setting the container 400 including the liquid tank 401 and the gas tank 402, the installation pipe 20 also has a first interface 23 and a second interface 24, the first interface 23 connects the installation cavity 21 and the liquid tank 401, and the second interface 24 connects the installation cavity 21 and the gas tank 402, the nozzle 100 also includes a mixing tube 30, the mixing tube 30 is accommodated in the installation cavity 21, one end of the mixing tube 30 in the first direction X is sealed with the installation pipe 20, and the other end is sealed with the nozzle 10, the mixing tube 30 has a mixing cavity 31, and the mixing cavity 31 is connected to the first direction X. The first interface 23, the second interface 24 and the first section 111 are all connected, and the mixing chamber 31 is used to produce a gas-liquid mixture, so that the photovoltaic panel cleaning equipment 1000 can provide gas and liquid to the nozzle 100 separately through the liquid tank 401 and the gas tank 402, which is convenient for loading different gases and liquids according to different pollution conditions on the photovoltaic panel. At the same time, the liquid and gas can be evenly mixed in the mixing chamber 31 to form a gas-liquid mixture and then sprayed out through the nozzle 10, thereby extending the mixing time of the gas and liquid, so as to achieve a better cleaning effect of the gas-liquid mixture.

[0084] Please refer to Figures 8 to 10 The first interface 23 is located on the side of the mixing tube 30 away from the nozzle 10 in the first direction X, and the second interface 24 is located on the outer side of the mixing tube 30. The mixing chamber 31 penetrates the mixing tube 30 in the first direction X and has a first opening 34 and a second opening 35. The first opening 34 is connected to the first interface 23, and the second opening 35 is connected to the first section 111. The outer wall of the mixing tube 30 is also provided with a plurality of through holes 36, and the plurality of through holes 36 are evenly distributed in the circumferential direction of the mixing tube 30 and in the first direction X. The plurality of through holes 36 connect the second interface 24 and the mixing chamber 31. The first opening 34 is used for liquid to enter the mixing chamber 31, and the through holes 36 are used for gas to enter the mixing chamber 31.

[0085] When the liquid enters the mixing chamber 31 from the first opening 34, the gas enters the mixing chamber 31 from the plurality of through holes 36 and mixes with the liquid to form a gas-liquid mixture. Optionally, the installation chamber 21 includes a first chamber 211, a second chamber 212, and a third chamber 213 sequentially arranged in the first direction X, the first chamber 211 communicates with the first interface 23 and the first opening 34, the second chamber 212 is used to accommodate the mixing tube 30 and communicates with the second interface 24 and the plurality of through holes 36, and the third chamber 213 is used to accommodate the nozzle 10. Optionally, in the orthographic projection on the first direction X, the contours of the first chamber 211, the second chamber 212, the third chamber 213 and the mixing chamber 31 are all circular, and the inner diameter of the first chamber 211 is smaller than the inner diameter of the second chamber 212, and also smaller than the inner diameter of the mixing chamber 31, so as to ensure that when the liquid enters the mixing chamber 31 from the first chamber 211, it will not enter the second chamber 212 from the gap between the mixing tube 30 and the mounting tube 20, thereby ensuring that the pressure of the liquid entering the mixing chamber 31 will not decrease.

[0086] Optionally, in the radial orthographic projection of the mixing tube 30, the outline of the through hole 36 is a rectangle, and the outline of the through hole 36 may also be a circle, an ellipse, or other non-circular shapes, without limitation. Optionally, the plurality of through holes 36 partially overlap in the first direction X, or may be staggered in the first direction X, without limitation.

[0087] By setting the first interface 23 to be located on the side of the mixing tube 30 away from the nozzle 10 in the first direction X, and the second interface 24 to be located on the outer circumference side of the mixing tube 30, the mixing chamber 31 passes through the mixing tube 30 in the first direction X and has a first opening 34 and a second opening 35, the first opening 34 is connected to the first interface 23, and the second opening 35 is connected to the first section 111, and the outer peripheral wall of the mixing tube 30 is also provided with a plurality of through holes 36, the plurality of through holes 36 are evenly distributed in the circumferential direction of the mixing tube 30 and in the first direction X, the plurality of through holes 36 connect the second interface 24 and the mixing chamber 31, the first opening 34 is used for liquid to enter the mixing chamber 31, and the through holes 36 are used for gas to enter the mixing chamber 31, so that when the liquid flows along the first direction X, the gas can enter the mixing chamber 31 through the plurality of through holes 36 and mix with the liquid to produce a gas-liquid mixture, thereby increasing the contact area between the liquid and the gas, which is beneficial to improving the uniformity and ejection speed of the gas-liquid mixture and reducing the liquid consumption of the photovoltaic panel cleaning device 1000.

[0088] Please refer to Figures 8 to 10 The nozzle 100 also includes a first joint 60 and a second joint 70, both of which are one-way valves. One end of the first joint 60 extends into the first interface 23 and is sealed and connected to the mounting pipe 20, and the other end of the first joint 60 is connected to the liquid tank 401. One end of the second joint 70 extends into the second interface 24 and is sealed and connected to the mounting pipe 20, and the other end of the second joint 70 is connected to the gas tank 402.

[0089] Optionally, the first joint 60 and the second joint 70 can be connected to the installation tube 20 by threads, or can be connected and fixed by clamping and riveting, etc., without limitation. Optionally, the channel enclosed by the first joint 60 and the channel enclosed by the second structure both extend in a straight line, so that both gas and liquid can be input into the installation cavity 21 in a straight line direction, reducing the pressure loss of gas and liquid.

[0090] After the liquid tank 401 and the gas tank 402 input liquid and gas into the installation cavity 21 and the gas-liquid mixture is not ejected from the injection channel 11, the pressure in the installation cavity 21 is greater than the pressure in the liquid tank 401 and the gas tank 402. Therefore, a first joint 60 and a second joint 70 are provided. The first joint 60 and the second joint 70 are both one-way valves. One end of the first joint 60 extends into the first interface 23 and is sealed and connected to the installation pipe 20, and the other end of the first joint 60 is communicated with the liquid tank 401, and one end of the second joint 70 extends into the second interface 24 and is sealed and connected to the installation pipe 20, and the other end of the second joint 70 is communicated with the gas tank 402. When the liquid tank 401 and the gas tank 402 input liquid and gas into the installation cavity 21, no backflow will occur due to the pressure in the installation cavity 21, thereby ensuring the ejection speed of the gas-liquid mixture and the impact force on the photovoltaic panel, thereby improving the cleaning effect of each unit of gas-liquid mixture and reducing the liquid consumption.

[0091] Please refer to Figure 1 There are multiple nozzles 100, and the multiple nozzles 100 are evenly distributed on the hanging device 300. The controller is used to control the multiple nozzles 100 to work simultaneously or alternately. Optionally, the nozzles 10 of the multiple nozzles 100 can be any one of the first nozzle P1, the second nozzle P2, the third nozzle P3 and the fourth nozzle P4 mentioned above, without limitation. The photovoltaic panel cleaning device 1000 provided by the present invention can use different nozzles 10 to perform cleaning operations according to different pollution conditions on the photovoltaic panel.

[0092] Optionally, when the photovoltaic panel cleaning device 1000 is in the synchronous spray mode, the multiple nozzles 100 simultaneously spray the gas-liquid mixture, and the liquid consumption and cleaning range of the photovoltaic panel cleaning device 1000 in the synchronous spray mode both reach the maximum preset value. When the photovoltaic panel cleaning device 1000 is in the neutral spray mode, at least one of the multiple nozzles 100 sprays the gas-liquid mixture, and when the photovoltaic panel cleaning device 1000 is in the alternating spray mode, the multiple nozzles 100 alternately spray the gas-liquid mixture in sequence, and the liquid consumption and cleaning range of the photovoltaic panel cleaning device 1000 in the neutral spray mode or the alternating spray mode are both less than those in the synchronous spray mode.

[0093] Optionally, the spray angles of multiple nozzles 100 may be the same or different, and the liquid content and gas content of the gas-liquid mixture sprayed by multiple nozzles 100 may be the same or different, without limitation. The photovoltaic panel cleaning equipment 1000 can reduce liquid consumption and improve cleaning effect by changing the spray angles of different nozzles 100 and the flow rate and gas-liquid ratio of the gas-liquid mixture according to the contamination conditions on the photovoltaic panel.

[0094] By setting up multiple nozzles 100, the multiple nozzles 100 are evenly distributed on the hanging device 300, and the controller is used to control the multiple nozzles 100 to work simultaneously or alternately, so that the photovoltaic panel cleaning equipment 1000 can control the multiple nozzles 100 to work simultaneously or alternately according to the pollution conditions on the photovoltaic panel, thereby improving the cleaning range and cleaning efficiency of the photovoltaic panel cleaning equipment 1000.

[0095] Please refer to Figure 1The photovoltaic panel cleaning device 1000 also includes a detection member and a first rotating mechanism 500. The detection member is installed on the drone 200 or the hanging device 300. The detection member is electrically connected to the controller. The first rotating mechanism 500 is installed on the hanging device 300 and is connected to the nozzle 100. The photovoltaic panel has a plurality of areas to be cleaned arranged in an array. The detection member is used to detect the degree of contamination of the plurality of areas to be cleaned. The controller is used to control the first rotating mechanism 500 to drive the nozzle 100 to rotate around the first axis L1 and / or the second axis L2, so that the spray angle of the nozzle 100 is adapted to the inclination angle of the photovoltaic panel, and the nozzle 10 sprays a gas-liquid mixture to at least one area to be cleaned, and the second axis L2 intersects with the first axis L1.

[0096] Optionally, the first rotating mechanism 500 includes a first mounting member 501, a second mounting member 502, a third mounting member 503 and a first driving member 504, wherein the first mounting member 501 is connected and fixed to the lower hanging device 300, the second mounting member 502 is connected and rotated with the first mounting member 501 around the first axis L1, the first driving member 504 is connected and fixed to the second mounting member 502, the third mounting member 503 is connected to the output end of the first driving member 504 and to the nozzle 100, and the first driving member 504 is used to drive the nozzle 100 to rotate around the second axis L2. Optionally, the first rotating mechanism 500 also includes a second driving member, which is mounted on the first mounting member 501, the second mounting member 502 is connected to the output end of the second driving member, and the second driving member is used to drive the second mounting member 502 to rotate relative to the first mounting member 501 around the first axis L1.

[0097] Optionally, the first mounting member 501 is provided with a guide groove 505 extending in the annular direction, and the first rotating mechanism 500 further includes a limiter 506, which passes through the guide groove 505 and is connected to the second mounting member 502 to limit the rotation angle of the second mounting member 502 relative to the first mounting member 501. Optionally, the second mounting member 502 drives the nozzle 100 to rotate around the first axis L1 at an angle of 0°-90°, which can be specifically 0°, 30°, 45°, 60° and 90°, etc., without limitation. Optionally, the first driving member 504 drives the nozzle 100 to rotate around the second axis L2 at an angle of 0°-180°, which can be specifically 0°, 60°, 90°, 120° and 180°, etc., without limitation.

[0098] In which, when the distance and angle between the photovoltaic cleaning equipment and the photovoltaic panel remain unchanged, the detection component can detect the angle between the spray angle of the nozzle 100 and the photovoltaic panel, and control the first rotating mechanism 500 through the controller to drive the nozzle 100 to rotate around the first axis L1 and / or the second axis L2, so that the spray angle of the nozzle 100 is adapted to the inclination angle of the photovoltaic panel.

[0099] Optionally, there are multiple nozzles 100 and first rotating mechanisms 500, multiple first rotating mechanisms 500 are evenly arranged on the lower hanging device 300, multiple first rotating mechanisms 500 are connected to multiple nozzles 100 in a one-to-one correspondence, the detection member can detect the pollution on the photovoltaic panel, and drive each nozzle 100 to rotate around the first axis L1 and / or the second axis L2 through the controller and multiple first rotating mechanisms 500. Optionally, the coverage of the gas-liquid mixture sprayed by the multiple nozzles 100 on the photovoltaic panel is spaced apart from each other, or the coverage of the gas-liquid mixture sprayed by at least two nozzles 100 on the photovoltaic panel at least partially overlaps, without limitation.

[0100] By setting a detection member and a first rotating mechanism 500, the detection member is installed on the drone 200 or the hanging device 300, the detection member is electrically connected to the controller, the first rotating mechanism 500 is installed on the hanging device 300 and connected to the nozzle 100, the photovoltaic panel has a plurality of areas to be cleaned arranged in a display, the detection member is used to detect the degree of contamination of the plurality of areas to be cleaned, the controller is used to control the first rotating mechanism 500 to drive the nozzle 100 to rotate around the first axis L1 and / or the second axis L2, so that the spray angle of the nozzle 100 is adapted to the inclination angle of the photovoltaic panel, and the nozzle 10 sprays a gas-liquid mixture to at least one area to be cleaned, The second axis L2 intersects with the first axis L1. Compared with the solution of changing the tilt angle of the drone 200 to adapt the spray angle of the nozzle 100 to the tilt angle of the photovoltaic panel, the photovoltaic panel cleaning device 1000 can detect the angle between the spray angle of the nozzle 100 and the tilt angle of the photovoltaic panel and the pollution condition on the photovoltaic panel through the detection part, and then control the first rotating mechanism 500 to drive the nozzle 100 to rotate through the control part, so that the spray angle of the nozzle 100 is adapted to the tilt angle of the photovoltaic panel, which reduces the operating difficulty of the photovoltaic panel cleaning device 1000 and improves the working efficiency of the photovoltaic panel cleaning device 1000.

[0101] Please refer to Figure 1The lower hanging device 300 includes a second rotating mechanism 301, a third rotating mechanism 302, a first connecting arm 303 and a second connecting arm 304. The second rotating mechanism 301 is installed on the UAV 200. One end of the first connecting arm 303 is connected to the second rotating mechanism 301, and the other end of the first connecting arm 303 is connected to the third rotating mechanism 302. The second connecting arm 304 is connected to the third rotating mechanism 302. The first rotating mechanism 500 is installed on the second connecting arm 304. The second rotating mechanism 301 and the third rotating mechanism 302 are connected to each other. 2 are electrically connected to the controller, the detection member is also used to detect the angle between the second connecting arm 304 and the photovoltaic panel, the second rotating mechanism 301 is used to drive the first connecting arm 303 to rotate around the third axis L3, and the third rotating mechanism 302 is used to drive the second connecting arm 304 to rotate around the fourth axis L4, so that the spraying angle of the nozzle 100 is adapted to the inclination angle of the photovoltaic panel, the third axis L3 intersects with the fourth axis L4 and the length direction of the first connecting arm 303, and the fourth axis L4 intersects with the first axis L1 and the second axis L2.

[0102] Optionally, the lower hanging device 300 also includes a mounting bracket 305 and a landing gear 306, the mounting bracket 305 is connected and fixed to the drone 200, and the container 400 is installed in the receiving space enclosed by the mounting bracket 305. Specifically, the container 400 includes a gas tank 402 and a liquid tank 401, and the gas tank 402 and the liquid tank 401 are both installed on the mounting bracket 305. The landing gear 306 is connected to one end of the mounting bracket 305 away from the drone 200. When the photovoltaic panel cleaning equipment 1000 is in a shutdown state, the drone 200 does not work and the photovoltaic panel cleaning equipment 1000 is located on the ground or on a landing platform, and the landing gear 306 is in contact with the ground or the landing platform to support the photovoltaic panel cleaning equipment 1000.

[0103] Optionally, the second rotating mechanism 301 includes a fourth mounting member 3011 and a third driving member 3012, the fourth mounting member 3011 is connected and fixed to the mounting bracket 305, the third driving member 3012 is connected to the fourth mounting member 3011, the output end of the third driving member 3012 is connected to the first connecting arm 303, and the third driving member 3012 is used to drive the first connecting arm 303 to rotate around the third axis L3. Optionally, the rotation angle of the first connecting arm 303 relative to the mounting bracket 305 is 0°-180°, which can be 0°, 60°, 90°, 120° and 180°, etc., without limitation. Optionally, the third driving member 3012 can drive the first connecting arm 303 to rotate 0°-90° around the third axis L3 to any side in the front-rear direction Y of the photovoltaic panel cleaning device, without limitation.

[0104] Optionally, the third rotating mechanism 302 includes a fourth driving member 3021, the fourth driving member 3021 is connected to one end of the first connecting arm 303 away from the second rotating mechanism 301, the output end of the fourth driving member 3021 is connected to the second connecting arm 304, specifically, the output end of the fourth driving member 3021 is connected to the middle position of the second connecting arm 304, and the fourth driving member 3021 is used to drive the second connecting arm 304 to rotate around the fourth axis L4. Optionally, the rotation angle of the second connecting arm 304 relative to the first connecting arm 303 is 0°-90°, specifically 0°, 30°, 45°, 60° and 90°, etc., without limitation. Optionally, the fourth driving member 3021 can drive the second connecting arm 304 to rotate 0°-45° around the fourth axis L4 to any side of the left and right direction Z of the photovoltaic panel cleaning device, without limitation.

[0105] Among them, the detection part is used for the angle between the spray angle of the nozzle 100 and the tilt angle of the photovoltaic panel, and the controller controls the second rotating mechanism 301 and the third rotating mechanism 302 and the aforementioned first rotating mechanism 500 to change the spray angle of the nozzle 100 and the tilt angle of the photovoltaic panel, so that the spray angle of the nozzle 100 is adapted to the tilt angle of the photovoltaic panel.

[0106] Optionally, when the photovoltaic panel cleaning device 1000 is in a shutdown state, the drone 200 does not work, and the lower hanging device 300 is in a retracted state. Specifically, the second rotating mechanism 301 controls the first connecting arm 303 to rotate into the aforementioned landing gear 306, that is, the extension direction of the first connecting arm 303 is the front-to-back direction Y of the photovoltaic panel cleaning device, and the third rotating mechanism 302 controls the second connecting arm 304 to be perpendicular to the first connecting arm 303, that is, the extension direction of the second connecting arm 304 is the left-right direction Z of the photovoltaic panel cleaning device. When the photovoltaic panel cleaning device 1000 is in a working state, the drone 200 flies up and is above the photovoltaic panel, and the second rotating mechanism 301 controls the first connecting arm 303 to extend from the landing gear 306.

[0107] By setting a second rotating mechanism 301, a third rotating mechanism 302, a first connecting arm 303 and a second connecting arm 304, the second rotating mechanism 301 is installed on the drone 200, one end of the first connecting arm 303 is connected to the second rotating mechanism 301, the other end of the first connecting arm 303 is connected to the third rotating mechanism 302, the second connecting arm 304 is connected to the third rotating mechanism 302, the first rotating mechanism 500 is installed on the second connecting arm 304, the second rotating mechanism 301 and the third rotating mechanism 302 are both electrically connected to the controller, the detection element is also used to detect the angle between the second connecting arm 304 and the photovoltaic panel, the second rotating mechanism 301 is used to drive the third rotating mechanism 302. A connecting arm 303 rotates around a third axis L3, and the third rotating mechanism 302 is used to drive the second connecting arm 304 to rotate around a fourth axis L4 so that the spray angle of the nozzle 100 is adapted to the inclination angle of the photovoltaic panel. The third axis L3 intersects with the fourth axis L4 and the length direction of the first connecting arm 303, and the fourth axis L4 intersects with the first axis L1 and the second axis L2, so that the photovoltaic panel cleaning device 1000 can control the position of the nozzle 100 and the angle between the spray angle of the nozzle 100 and the inclination angle of the photovoltaic panel through the second rotating mechanism 301 and the third rotating mechanism 302 to adapt the respective working states of the photovoltaic panel cleaning device 1000.

[0108] In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationship of terms such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inside" and "outside" are based on the orientation or positional relationship described in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0109] What is disclosed above is only a preferred embodiment of the present invention, and it certainly cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made according to the claims of the present invention still fall within the scope covered by the present invention.

Claims

1. A photovoltaic panel cleaning device, characterized in that: Used for cleaning photovoltaic panels, the photovoltaic panel cleaning device comprises: Drones; A lower hanging device connected to the UAV; A container, mounted on the lower hanging device; A controller, used to control the pressure and flow rate of the fluid output from the container; A spray head is arranged on the hanging device, the spray head is connected with the container, the spray head is used to spray out the gas-liquid mixture, and the spray angle of the spray head is adapted to the inclination angle of the photovoltaic panel; The liquid content in the gas-liquid mixture sprayed out by the nozzle per minute is Q1, and the gas content is Q2, which satisfies: 0.1≤Q2 / Q1≤0.5, 0≤Q1≤6L.

2. The photovoltaic panel cleaning device according to claim 1, characterized in that: The nozzle comprises a nozzle, the nozzle has an injection channel, the injection channel runs through the nozzle in a first direction, the injection channel comprises a first section, a second section and a third section arranged in sequence in the first direction, the first section is connected to the container, the second section extends along the first direction, and the first section and the third section are both in a flared shape; The angle between the extension direction of the inner circumferential wall of the first section and the first direction is C1, which satisfies: 7.5°≤C1≤45°; the angle between the extension direction of the inner circumferential wall of the third section and the first direction is C2, which satisfies: 45°≤C2≤50°.

3. The photovoltaic panel cleaning device according to claim 2, characterized in that: The third section includes a plurality of mutually isolated sub-channels, the plurality of sub-channels are evenly distributed in the circumferential direction of the nozzle, the same end of the plurality of sub-channels in the first direction are connected to the second section, and the spacing distance between the plurality of sub-channels gradually increases from the direction of the first section approaching the third section.

4. The photovoltaic panel cleaning device according to claim 2, characterized in that: The nozzle also includes a mounting tube, which is connected to the lower hanging device, and has a mounting cavity, which is communicated with the container. One end of the mounting tube in the first direction also has a mounting port, and the nozzle is used to extend from the mounting port into the mounting cavity and be sealed and connected to the mounting tube, and the first section is communicated with the mounting cavity.

5. The photovoltaic panel cleaning device according to claim 4, characterized in that: The container includes a liquid tank and a gas tank, and the installation tube further includes a first interface and a second interface, the first interface is connected to the installation cavity and the liquid tank, and the second interface is connected to the installation cavity and the gas tank; The nozzle also includes a mixing tube, which is accommodated in the mounting cavity. One end of the mixing tube in the first direction is sealedly connected to the mounting tube, and the other end is sealedly connected to the nozzle. The mixing tube has a mixing chamber, which is connected to the first interface, the second interface and the first section, and the mixing chamber is used to produce a gas-liquid mixture.

6. The photovoltaic panel cleaning device according to claim 5, characterized in that: The first interface is located at a side of the mixing tube away from the nozzle in the first direction, and the second interface is located at a side of the outer circumference of the mixing tube; The mixing chamber penetrates the mixing tube in the first direction and has a first opening and a second opening, the first opening is communicated with the first interface, and the second opening is communicated with the first section; The outer wall of the mixing tube is also provided with a plurality of through holes, which are evenly distributed in the circumferential direction of the mixing tube and in the first direction, and connect the second interface and the mixing chamber. The first opening is used for liquid to enter the mixing chamber, and the through holes are used for gas to enter the mixing chamber.

7. The photovoltaic panel cleaning device according to claim 5, characterized in that: The nozzle also includes a first joint and a second joint, both of which are one-way valves, one end of the first joint extends into the first interface and is sealed and connected to the mounting tube, the other end of the first joint is connected to the liquid tank, one end of the second joint extends into the second interface and is sealed and connected to the mounting tube, and the other end of the second joint is connected to the gas tank.

8. The photovoltaic panel cleaning device according to any one of claims 1 to 7, characterized in that: There are multiple nozzles, and the multiple nozzles are evenly distributed on the hanging device. The controller is used to control the multiple nozzles to work simultaneously or alternately.

9. The photovoltaic panel cleaning device according to claim 1, characterized in that: The photovoltaic panel cleaning device further includes a detection member and a first rotating mechanism, wherein the detection member is mounted on the drone or the lower hanging device, the detection member is electrically connected to the controller, and the first rotating mechanism is mounted on the lower hanging device and connected to the nozzle; The photovoltaic panel has multiple areas to be cleaned arranged in an array, the detection element is used to detect the degree of contamination of the multiple areas to be cleaned, the controller is used to control the first rotating mechanism to drive the nozzle to rotate around the first axis and / or the second axis, so that the spray angle of the nozzle is adapted to the inclination angle of the photovoltaic panel, and the nozzle sprays a gas-liquid mixture to at least one of the areas to be cleaned, and the second axis intersects the first axis.

10. The photovoltaic panel cleaning device according to claim 9, characterized in that: The lower hanging device comprises a second rotating mechanism, a third rotating mechanism, a first connecting arm and a second connecting arm, the second rotating mechanism is installed on the UAV, one end of the first connecting arm is connected to the second rotating mechanism, the other end of the first connecting arm is connected to the third rotating mechanism, the second connecting arm is connected to the third rotating mechanism, and the first rotating mechanism is installed on the second connecting arm; The second rotating mechanism and the third rotating mechanism are both electrically connected to the controller, and the detection member is also used to detect the angle between the second connecting arm and the photovoltaic panel. The second rotating mechanism is used to drive the first connecting arm to rotate around a third axis, and the third rotating mechanism is used to drive the second connecting arm to rotate around a fourth axis, so that the spray angle of the nozzle is adapted to the inclination angle of the photovoltaic panel. The third axis intersects with the fourth axis and the length direction of the first connecting arm, and the fourth axis intersects with the first axis and the second axis.

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