Liquid spraying device for washing, cooling, and deicing of facilities

Abstract

The present invention provides a liquid spraying device for washing, cooling, and deicing of facilities, the device comprising: a storage tank for storing a liquid containing a washing solution or a deicing solution; a photocatalytic water treatment device disposed around the storage tank or inside the storage tank to purify the liquid; an oxygen nanobubble generating device for increasing the dissolved oxygen content of the liquid; a pipe installed as an embedded or external type; a pump for transporting, through the pipe, the washing solution or deicing solution discharged from the storage tank; and a plurality of spray nozzles connected to the pipe and spraying the washing solution or deicing solution onto the surface of the target object.

Description

Liquid spraying device for cleaning, cooling and de-icing of facilities

[0001] This application claims priority to Korean Patent Application No. 10-2023-0170149, filed November 29, 2023, the entire disclosure of which is incorporated herein by reference.

[0002] The present invention relates to a liquid spraying device, and more particularly, to a liquid spraying device for washing, cooling and removing snow from a facility having a structure capable of spraying a cleaning liquid or a de-icing liquid onto the surface of a target object after purifying it.

[0003] In general, closed water bodies such as rivers, ponds, lakes, dams, and reservoirs, where water flow is slow and stagnant, have a continuous inflow of surface sewage, domestic wastewater, factory and agricultural and livestock wastewater, which increases the concentration of pollutants in the water.

[0004] Nutrients, including nitrogen compounds and phosphates among pollutants, promote the growth and proliferation of microorganisms that decompose organic matter, thus causing eutrophication in freshwater.

[0005] Eutrophication refers to the phenomenon of excessive algal blooms in freshwater caused by the decomposition of organic matter by microorganisms, leading to increased levels of nutrients such as nitrogen and phosphorus. This eutrophication causes serious damage to the lake ecosystem, including reduced freshwater turbidity, foul odors from decaying waste, and, in severe cases, mass fish deaths. Furthermore, in enclosed waters with little water flow, oxygen is depleted in the lower layers, exacerbating water pollution from the bottom.

[0006] Therefore, in closed waters, it is important to maintain a balance so that the amount of nutrients such as nitrogen and phosphorus contained in the aquatic ecosystem does not exceed its self-purification capacity, and it is also very important to increase the dissolved oxygen in the water as much as possible so that the purification process of sinking organic matter and heavy metals can be carried out smoothly.

[0007] However, despite the increase in sewage treatment facilities on the upstream side, many dams, reservoirs, and lakes in the country are still experiencing a deterioration in water quality due to the inflow of large amounts of pollutants and the formation of dense layers over long periods of fresh water.

[0008] Among the major conventional water quality improvement methods, direct purification methods using physical methods include coagulation and sedimentation, direct sedimentation, filtration, aeration, circulation, water purification, and phosphorus recovery technology, while biological methods include direct oxidation, vegetation purification, microbial preparations, and fixation by enzymes. However, as previously discussed, they have limitations in purifying lakes due to short-term purification and local side effects.

[0009] Advances in science and technology have led to the mass production and use of a wide variety of chemicals, raising environmental pollution caused by synthetic chemicals as a social problem. Water pollution caused by non-biodegradable substances, which are difficult to treat using conventional methods, is particularly serious. The problem with hazardous non-biodegradable pollutants is that they are difficult to treat using conventional physical or biological methods alone.

[0010] In addition to the environmental pollution problem of closed water bodies where water flow is slow and stagnant, water pollution caused by early rainfall is also causing serious environmental problems.

[0011] In areas paved with concrete or asphalt, when it rains, the infiltration and retention functions of rainwater are reduced, and highly polluted substances from the initial rainfall flow into nearby sewers or rivers, adversely affecting the water system.

[0012] Pollution that occurs through unspecified emission routes, such as roads, farmland, and construction sites, is called nonpoint pollution. Fine tire dust accumulated on roads, nitrogen oxides (NOx), which are the main culprit of fine dust, pesticide components remaining in farmland, and dust generated at construction sites are all nonpoint pollutants. These are the main cause of river pollution when they are washed away with rainwater when it rains. The reason why these nonpoint pollutants are a problem is that pollutants generated in unspecified places flow directly into rivers when it rains without any special filtration, so they quickly contaminate water quality. Water pollution is much more serious than other types of pollution because it does not simply make water turbid; it can cause mass fish deaths or destroy habitats for plants and animals, disrupting the ecosystem.

[0013] Recently, interest in non-point source pollution reduction devices such as infiltration facilities, retention facilities, and filtration facilities has been increasing to treat non-point source pollution caused by early rainfall.

[0014] Although infiltration facilities and retention facilities, which are called natural non-point source pollution reduction technologies, are said to have good installation effects, they have the disadvantage of taking up a lot of land. Therefore, filtration facilities called filtration-type non-point source pollution treatment facilities are often installed along with natural non-point source pollution reduction facilities. For example, Korean Patent Publication No. 10-1311903 discloses a non-point source pollution filtration treatment device characterized in that a plurality of fiber unit filters are arranged adjacent to each other and continuously inside a debris collection pipe, and polluted water flows through the debris collection pipe, filtering out pollutants and passing through the drain hole of the debris collection pipe to be discharged outside the sedimentation tank.

[0015] Filtration-type non-point source pollution treatment facilities have the advantage of requiring less land area and faster treatment speed than natural types, but have the disadvantage of requiring maintenance such as regular cleaning and replacement of filter media.

[0016] In addition, existing filters only have the function of filtering out pollutant particles, so they have a weakness in that they cannot decompose harmful substances such as nitrogen oxides (NOx) and sulfur oxides (SOx), which are the main culprits of fine dust, and instead pass them through.

[0017] Rainwater or river water collected in the aforementioned storage facilities can be used as a cleaning liquid for solar panels. For example, Korean Patent No. 10-1213146 discloses a solar panel cleaning and remote control system that cleans and remotely controls solar power modules to improve their power generation efficiency.

[0018] However, conventional solar power generation cleaning systems have vulnerabilities in that they cannot treat organic contaminants or various foreign substances remaining in the cleaning liquid and instead spray them directly onto the surface of the solar panel (power generation module) through the spray nozzle, which can cause the spray nozzle to become clogged, cause stains on the surface of the solar panel, or cause physical and chemical damage to the surface.

[0019] Additionally, there is concern that the cleaning liquid may contain residual harmful substances such as nitrogen oxides (NOx) and sulfur oxides (SOx), as well as bacteria such as E. coli, which may cause secondary pollution such as water or soil pollution after being sprayed on solar panels.

[0020] The present invention was created in consideration of the above problems, and its purpose is to provide a liquid spray device for washing, cooling and de-icing facilities, in which the structure of the spray nozzle is improved so that water with cleaner and enhanced cleaning power can be sprayed in a wide width on the surface of the target object by increasing the amount of dissolved oxygen in the washing liquid or de-icing liquid.

[0021] Another object of the present invention is to provide a liquid spraying device for washing, cooling and snow removal of a facility that can improve the air quality around the facility and does not cause secondary pollution such as water pollution or soil pollution.

[0022] In order to achieve the above object, the present invention comprises: a storage tank for storing a liquid including a cleaning solution or a de-icing solution; a photocatalytic water treatment device disposed around or inside the storage tank to purify the liquid; an oxygen nanobubble generator for increasing the dissolved oxygen content of the liquid; a pipe installed as an embedded or external type; a pump for transporting the cleaning solution or de-icing solution discharged from the storage tank through the pipe; and a plurality of spray nozzles connected to the pipe and spraying the cleaning solution or de-icing solution onto the surface of an object; wherein the photocatalytic water treatment device comprises: a box-shaped or mesh-shaped support body having an open upper surface and a plurality of perforations formed on a lower surface and a peripheral surface; a gravel filter unit having a plurality of porous gravel surfaces coated with a photocatalytic material, the surfaces of which are disposed inside the support body; And an LED mesh in which a plurality of LED elements capable of irradiating ultraviolet or visible light to the porous gravel and activating the photocatalytic material are installed at set intervals in a zigzag shape arranged in the gravel filtering section; wherein the spray nozzle comprises: a base portion having a flat upper surface and having a settling hole formed in a portion thereof; a nozzle block assembled to a lower surface of the base portion and having an internal space into which a liquid having a flow rate and pressure controlled by a pump can be introduced; a disk-shaped valve installed in the nozzle block and positioned within the settling hole, selectively rising to a set height by the hydraulic pressure of the liquid and spraying the cleaning liquid or de-icing liquid to the outside through a gap formed below a circular edge, and lowering and returning to the original position when the hydraulic pressure is released; a stopper provided at the lower end of the disk-shaped valve to limit the rising height of the disk-shaped valve; And a wall part provided on the lower surface of the above-mentioned disk-shaped valve to partially close the gap when the above-mentioned disk-shaped valve is completed to define the spray angle is provided. The present invention provides a liquid spray device for washing, cooling and removing snow from a facility, characterized in that it has:

[0023] The above porous gravel may be a porous scoria volcanic eruption containing SiO2, Al2O3 and Fe2O3 components.

[0024] The above photocatalytic material may include a TiO2 component.

[0025] An auxiliary tank is further included, which is positioned at the front end of the storage tank, is communicated with the storage tank, and has a smaller storage capacity than the storage tank; and the photocatalytic water treatment device can be positioned within the auxiliary tank.

[0026] The above-mentioned spray nozzle may have a spray angle of 180 degrees by extending vertically downward by a set length from the outer circumference of one half of the edge of the above-mentioned disc-shaped valve.

[0027] The above wall portion may be formed of an arc-shaped protruding rib adjacent to the edge of the above disc-shaped valve.

[0028] The present invention may include a mobile phone or central control device that performs communication with the control unit to remotely control the pump.

[0029] It may include a detection unit that detects the injection state and standby state of the above injection nozzle.

[0030] The above facility is a solar power generation facility, and the plurality of injection nozzles are arranged at set intervals around a plurality of solar modules, and include at least a solar power device that supplies power to the pump; and a water temperature controller that maintains the temperature of the liquid within a set value; and the water temperature controller may be a cooling coil or an air-cooled radiator that cools the liquid to maintain the temperature at 20°C or lower.

[0031] The liquid spraying device for washing, cooling and snow removal of a facility according to the present invention has the following effects.

[0032] First, the high surface area of ​​scoria volcanic debris (volcanic clusters) and the catalytic action of ceramic components within the photocatalytic water treatment device connected to the storage tank can naturally decompose and kill bacteria and viruses, resulting in a purification process. Furthermore, the oxygen nanobubble generator connected to the storage tank increases the dissolved oxygen content in the cleaning or de-icing solution and generates hydroxyl radicals (OH radicals), effectively decomposing contaminants such as organic pollutants. The water, now free of contaminants, can then be sprayed onto the surface of solar panels. Therefore, the purified liquid, with its simple equipment and low cost, can be used for washing, cooling, and de-icing solar panels.

[0033] Second, the spray nozzle has a wide spray angle of 180 degrees, which increases the efficiency of washing, cooling, and snow removal work on solar panels and shortens the work time.

[0034] Third, the scoria volcanic material that constitutes the gravel filter is light in weight, hard enough not to be easily destroyed, and has a sufficiently large specific surface area compared to other minerals, so it can adsorb fine pollutants with high performance.

[0035] Fourth, if a photocatalytic material such as TiO2 is coated on the surface of porous gravel, various bacteria and viruses remaining in rainwater including initial rainfall or river water flowing in from non-point sources of pollution can be sterilized, and harmful substances such as nitrogen oxides (NOx), sulfur oxides (SOx), and volatile organic compounds (VOCs), which are the main causes of fine dust, can be decomposed, and the purified water can be used for washing, cooling, and snow removal of facilities.

[0036] Fifth, simply placing a gravel filter in a storage tank storing rainwater, tap water, groundwater, or river water not only filters the water contained in the tank but also sterilizes and decomposes harmful compounds, allowing for the construction of a low-cost, environmentally friendly photocatalytic water treatment device.

[0037] Sixth, the photocatalytic water treatment device can be installed in a relatively small auxiliary tank connected to the storage tank to secure sufficient water treatment capacity.

[0038] Seventh, a receiving portion capable of receiving fine dust, stone powder, etc. generated by contact or friction between porous gravel in the gravel filter section can be provided to prevent clogging of pipes or nozzles in advance.

[0039] Eighth, it can prevent air, water and soil pollution around solar modules caused by washing water used to clean solar panels.

[0040] Figure 1 is a configuration diagram of a liquid spraying device for washing, cooling and snow removal of a facility according to a preferred embodiment of the present invention.

[0041] Fig. 2 is a cross-sectional view showing a configuration in which a photocatalytic water treatment device is placed within an auxiliary tank in Fig. 1.

[0042] Figure 3 is a cross-sectional view showing in detail the configuration of the water treatment in Figure 2.

[0043] Figure 4 is a perspective view schematically illustrating the configuration before and after a catalyst coating layer is formed on the porous gravel in Figure 3.

[0044] Fig. 5 is a cross-sectional view showing a modified example of Fig. 3.

[0045] Fig. 6 is a perspective view showing the configuration of the LED mesh in Fig. 5.

[0046] Figure 7 is a front view showing the detailed configuration of the oxygen nanobubble generator in Figure 1.

[0047] Fig. 8 is a perspective view showing the exterior of the injection nozzle in Fig. 1 in detail.

[0048] Fig. 9 is a partial cross-sectional view showing an example in which a disk-shaped valve is raised by the hydraulic pressure of the liquid in Fig. 8 and the liquid is sprayed.

[0049] Fig. 10 is a perspective view showing the appearance of the disc-shaped valve in Fig. 9.

[0050] Fig. 11 is a bottom view of Fig. 10.

[0051] FIG. 12 is a drawing schematically showing the operation of a liquid spray device for washing, cooling and snow removal of a facility according to a preferred embodiment of the present invention.

[0052] FIG. 1 is a schematic diagram illustrating the configuration of a liquid spray device for washing, cooling and snow removal of a facility according to a preferred embodiment of the present invention.

[0053] Referring to FIG. 1, the present invention includes a storage tank (100) in which a liquid used as a cleaning liquid or a de-icing liquid is stored, a photocatalytic water treatment device (201) for purifying the liquid, a pump (104) for pumping the liquid discharged from the storage tank (100), a control unit (106) for controlling the operation of the pump (104), a plurality of spray nozzles (120) arranged around a plurality of panel-shaped solar modules (hereinafter referred to as “solar panels”) installed in a solar power generation facility and spraying the liquid onto the surface of the solar panels (1), a pipe (111) for supplying the liquid transported by the pump (104) to the spray nozzles (120), and a valve box (108) having a communication card (110) capable of transmitting and receiving a control signal for controlling the spraying of the liquid and an electric valve (109) connected to the communication card (110). Preferably, the 'facility' to which the present invention is applied may be a solar power generation facility. Furthermore, the object to be cleaned, cooled, and de-iced may be a solar panel (module).

[0054] The storage tank (100) has an internal space capable of accommodating liquid (water) used as a cleaning solution or de-icing solution. The liquid stored in the storage tank (100) may include rainwater secured through rainwater storage tanks in subway stations, river water procured from rivers connected to various non-point pollution sources, and tap water used for household, industrial, or agricultural purposes. The dissolved oxygen content of the oxygen nanobubble water stored in the storage tank (100) is maintained at a high level when the temperature is maintained at 20°C or lower, and considering oxidation resistance and corrosion resistance, the storage tank (100) is preferably an underground concrete structure having a storage capacity of, for example, 50 tons or more. Alternatively, the storage tank (100) may be a tank composed of stainless steel, fiberglass reinforced plastic (FRP), sheet molding compound (SMC), polyethylene (PE), or the like.

[0055] The upper part of the storage tank (100) is provided with an inlet for injecting liquid and a cover, and the lower part is provided with a discharge part for discharging the stored liquid to the outside. The present invention can be operated for the purpose of cleaning and cooling the surface of a solar panel (1) using recycled water such as groundwater or rainwater in the summer, and for the purpose of cleaning and removing snow from the surface of a solar panel (1) using a liquid containing an eco-friendly de-icing agent in the winter.

[0056] When a snow removal fluid is injected into the storage tank (100), a vertically arranged stirrer (not shown) may be provided at the inner center of the storage tank (100). The stirrer has a structure in which a stirring blade is installed below a motor fixed to the upper portion of the storage tank (100). The stirrer slowly rotates the stirring blade to stir the fluid stored in the storage tank (100), thereby preventing the snow removal fluid from settling in the winter or preventing the fluid inside the storage tank (100) from freezing. The installation structure of the stirrer is disclosed in more detail in the registered patent publication No. 10-2073520, which the applicant of the present invention previously applied for and was granted a patent for.

[0057] The above-mentioned deicing solution must contain a melting agent or a melting aid, a steel corrosion inhibitor, and a freezing point depressant. Among the melting agent compounds, acetate or formic acid salts may be added considering the environmental friendliness and biodegradability of the material, which is harmless to solar panels and the ecosystem. Preferably, food additives such as citric acid, sodium citrate, gluconic acid, sodium gluconate, and potassium gluconate may be added as steel corrosion inhibitors. For example, the composition may be water:glycerin = 60%:40% by weight or water:propylene glycol = about 65%: about 35% by weight. More preferably, the deicing solution may contain 2 to 10 wt% potassium formate, 2 to 10 wt% potassium acetate, 0.5 to 2 wt% urea, 3 to 15 wt% propylene glycol, 0.01 to 0.02 wt% potassium hydroxide, 0.2 to 0.5 wt% sodium metasilicate, and 0.15 to 2.0 wt% tripotassium phosphate. In addition, the deicing solution may contain various known environmentally friendly deicing agents.

[0058] The photocatalytic water treatment device (201) may be placed around the storage tank (100) to perform the function of purifying the fluid to be introduced into the storage tank (100) in advance. Preferably, the photocatalytic water treatment device (201) may be placed in front of the storage tank (100) and may be placed in an auxiliary tank (200) that is in communication with the storage tank (100). Alternatively, the photocatalytic water treatment device (201) may be placed inside the storage tank (100) to purify the liquid.

[0059] The auxiliary tank (200) is a small storage container with a significantly smaller storage capacity than the storage tank (100), and can accommodate an amount of water corresponding to the contaminant treatment capacity of the photocatalytic water treatment device (201). The auxiliary tank (200) and the storage tank (100) can be selectively connected by a treated water discharge valve (203).

[0060] As detailed in Fig. 2, the photocatalytic water treatment device (201) is arranged in the internal space of the auxiliary tank (200). When the gravel filter (202) is set in the photocatalytic water treatment device (201) and the treated water discharge valve (203) is closed, and raw water, such as tap water or rainwater storage tank liquid, is supplied through the inlet pipe and stored in the auxiliary tank (200), water purification treatment proceeds naturally by the gravel filter (202) arranged to be submerged in the water to be treated in the auxiliary tank (200). For example, after the water treatment is purified for several to several tens of hours, the purified treated water can be moved to the storage tank (100) and stored by opening the treated water discharge valve (203). For this purpose, a predetermined pump may be interposed in the pipe between the auxiliary tank (200) and the storage tank (100). By repeating this process, the purified water collected in the storage tank (100) can be sprayed on the surface of the solar panel (1) as a washing, cooling, and snow removal liquid.

[0061] As shown in more detail in Fig. 3, the photocatalytic water treatment device (201) includes a support (201a) of a predetermined shape placed in the internal space of an auxiliary tank (200), and a gravel filter (202) which is an aggregate of a plurality of porous gravels (202a) placed on the support (201a).

[0062] The support (201a) may be composed of a mesh net capable of storing a gravel filter (202), or a stainless steel box or synthetic resin box with an open upper surface and a plurality of perforations formed on the lower surface and the peripheral surface. Alternatively, the support (201a) may simply be composed of a stainless steel plate with a plurality of perforations formed therein.

[0063] Preferably, the porous gravel (202a) may be a porous scoria volcanic product, a 'scoria cluster', containing silicon oxide (SiO2), aluminum oxide (Al2O3), and iron oxide (Fe2O3). The scoria volcanic product is formed when magma is released into the atmosphere during volcanic activity, allowing the volatile components inside to escape, creating many pores, and is derived from basic or neutral magma. The scoria volcanic product is light in weight, hard enough not to be easily destroyed, and has a surface area of ​​9.9 to 177.6 m2 / g, so it has a surface structure sufficient to adsorb fine pollutants.

[0064] In order to further promote the decomposition reaction of pollutants in the porous gravel (202a), as shown in Fig. 4, a catalyst coating layer (207) may be provided on the surface of each porous gravel (202a), which may preferably be formed by a photocatalytic composition mainly composed of titanium dioxide (TiO2). In addition, the catalyst coating layer (207) may further include an additive, such as phosphoric acid (H3PO4), so that the catalytic reaction of the catalyst coating layer (207) can occur well not only in an ultraviolet ray environment but also in a visible light environment, and further, even in a dark environment inside the storage tank (100) without a separate light source.

[0065] The support (206) is arranged at the bottom of the support (201a) to support the support (201a) so that it is stably fixed without floating in the water. The support (206) includes a first surface corresponding to the support (201a) and a second surface formed with a through hole (206a) located on both sides of the first surface and through which treated water can freely pass. The first surface, which is a portion without a through hole (206a), serves to prevent fine stone particles or dust generated in the gravel filter (202) and discharged through the through hole (201b) on the lower surface of the support (201a) from spreading into the water but stagnating on the first surface. As shown in Fig. 2, a protruding guide jaw may be provided on the upper surface of the first surface so as to hold the support (201a). Alternatively, the upper surface of the first surface may have a groove formed corresponding to the bottom surface of the support (201a), and the lower end of the support (201a) may be fitted into the groove.

[0066] In the gravel filter unit (202), an LED net (210) having a plurality of LED elements (210b) installed at set intervals on a wire array (210a) arranged in a mesh shape as shown in Fig. 6 can be arranged. The LED net (210) is connected to a power supply unit (208) arranged on the outside of the support (201a) via a power line (209).

[0067] As shown in Fig. 5, the LED net (210) is folded in a zigzag shape inside the gravel filter (202), and porous gravel (202a) is arranged between each fold, so that the porous gravel (202a) located inside the gravel filter (202) can be evenly irradiated with ultraviolet or visible light to further promote the activation reaction of the catalyst coating layer (207). In this case, the catalyst coating layer (207) is configured to include a photocatalytic composition.

[0068] As porous gravel (202a), scoria, a volcanic ash, was prepared, and in order to coat the surface of the porous gravel with a photocatalytic material, the porous gravel (202a) was dipped in a mixture of TiO2 and isopropyl alcohol (IPA) for 30 minutes, and then a heat treatment process was performed in an oven at 200°C for 1 hour. The porous gravel after the heat treatment process still contains pores on the surface and has an overall reddish color due to its characteristic of containing iron (Fe).

[0069] An oxygen nanobubble generator (300) is placed around a storage tank (100) and performs the function of increasing the dissolved oxygen content of a liquid to be injected (or injected) into the storage tank (100). Preferably, the oxygen nanobubble generator (300) can generate oxygen so that the dissolved oxygen content of the liquid injected from the injection nozzle (120) is 10 to 55 ppm.

[0070] As shown in Fig. 7, the oxygen nanobubble generator (300) includes an oxygen supplier (301) that provides oxygen gas, a nanobubble generator (302) that atomizes the oxygen gas supplied from the oxygen supplier (301) to generate oxygen nanobubbles in the liquid, and a water temperature controller (306, 307) that maintains the temperature of the liquid within a set value.

[0071] The oxygen nanobubbles generated from the nanobubble generator (302) preferably have an average diameter of 200 nanometers (nm) or less in order to most effectively decompose organic pollutants such as phenol, chloroform, and benzene. The organic pollutants are decomposed by the oxidation action of hydroxyl radicals generated when oxygen nanobubbles are aerated in the liquid in the storage tank, and the effects of decomposing pollutants such as nitrogen oxides (NOx) and sulfur oxides (SOx) as well as sterilization can be obtained. The oxidation action by hydroxyl radicals can contribute not only to the decomposition of pollutants in the water in the storage tank (100), but also to the decomposition of pollutants remaining on the surface of the solar panel (1) when water is sprayed on the panel. In addition, the sterilization effect against bacteria, etc. can be further promoted by the heat generated by the generation, friction, and collapse of oxygen nanobubbles. Oxygen nanobubbles are oxygen bubbles measuring in the nanometer (nm) scale. They have almost no buoyancy, so they can remain in the water of a storage tank as microscopic particles under Brownian motion for a long time (about 90 days or more). Oxygen nanobubbles generate high energy, heat, and vibration during the instantaneous cavitation and explosion process due to external pressure or deformation in the water of the storage tank or when water is sprayed, which generates a large amount of hydroxyl radicals, which are oxidizing substances. After reacting with pollutants, the hydroxyl radicals are reduced to oxygen and water.

[0072] The water temperature controller (306, 307) includes a radiator (306) that cools water passing through it by air cooling, and a cooling fan (307) that is attached to one side of the radiator (306) and circulates air about the radiator (306). According to this configuration, the oxygen nanobubble water discharged from the oxygen nanobubble generator (300) can be cooled by air through the process of passing through the radiator (306) in which outside air is circulated by the cooling fan (307). The radiator (306) is a cooling device that has a plurality of heat dissipation fins and a water circulation path to perform heat exchange with air. At this time, the power for operating the cooling fan (307) can be provided by a solar panel (303) that is arranged at an angle at the top of the device. A controller (305) including an inverter or the like can be connected to the solar panel (303). The controller (305) converts the electricity generated from the solar panel (303) into rated DC power that can operate the cooling fan (307) and outputs it to the cooling fan (307).

[0073] As indicated by the arrows in Fig. 7, the treated water discharged from the photocatalytic water treatment device (201) can be supplied to the storage tank (100) after passing through the oxygen nanobubble generator (300) and the water temperature controller (306, 307) in sequence. Specifically, the treated water discharged from the photocatalytic water treatment device (201) can be turned into oxygen nanobubble water through the process of ① -> ② -> ③ -> ④ -> ⑤ and then be injected into the storage tank (100). The oxygen nanobubble water injected into the storage tank (100) can be returned to the oxygen nanobubble generator (300) through the process of ⑥ -> ② and then the process of ③ -> ④ -> ⑤ can be repeated, thereby further increasing the amount of dissolved oxygen. More preferably, the treated water discharged from the photocatalytic water treatment device (201) may be circulated between a purified water tank (304) with a relatively small storage capacity (e.g., 200 liters) and an oxygen nanobubble generator (300) through the process of ① -> ② -> ③ -> ④ -> ⓐ -> ⓑ -> ⓒ, thereby increasing the dissolved oxygen content more efficiently and then being injected into the storage tank (100).

[0074] Referring again to FIG. 1, the pump (104) is connected to the discharge port of the storage tank (100) through a predetermined pipe and pumps the liquid discharged from the storage tank (100) at a predetermined flow rate and pressure. At least two pumps (104) are provided, and it is preferable that one of the two serves as an auxiliary pump.

[0075] The air supply device (103) is installed on one side of the pipe connected to the storage tank (100) and supplies air to discharge the remaining fluid in the pipe to the outside through the injection nozzle (112). The air supply device (103) may be connected to a separate air compressor, or alternatively, the air supply device (103) itself may be configured as an air compressor. When the summer solar panel washing and cooling mode is finished, the air supply device (103) discharges all remaining liquids such as groundwater, liquids, or tap water remaining in the entire pipe by air pressure, thereby preventing the pipe from freezing in the winter.

[0076] The liquid discharged from the storage tank (100) and pumped by the pump (104) is supplied to the pipe (111) via the main pipe (105).

[0077] A pump station is a facility that surrounds the exterior of a pump (104), a main pipe (105), an air supply device (103), a control unit (106), etc. to protect them. The pump station may be constructed as a house made of a concrete structure, etc., or a container, etc.

[0078] A pipe (111) is placed in a designated area of ​​the solar module to transport liquid pumped by a pump (104) and supply it to a spray nozzle (112). The pipe (111) may be buried underground under the road surface, or at least part of it may be exposed to the outside, if necessary.

[0079] The control unit (106) controls the operation of the pump (104) to control the flow rate and pressure of the liquid, on / off control, etc. The control unit (106) can be remotely controlled by communicating with a remote control device (107) that is composed of a remote control system including a remote mobile phone (smartphone) (107a) and / or a central control device (107b) which is a computer located in a central control room. The remote control device (107) can perform data communication with the control unit (106) through wired or wireless Internet, various serial communications, etc. Specifically, communication between the remote control device (107) and the control unit (106) can be performed according to at least one communication protocol selected from among, for example, LoRa, CDMA, LTE, Ethernet, CAN, RS422, RS232, and RS485. At least one communication protocol selected from among LoRa, CDMA, LTE, RS422, RS232, and RS485 may be used for communication between the control unit (106), the storage tank (100), the pump (104), the detection unit (113), and the electric valve (109).

[0080] The control unit (106) is preferably provided in a control panel having a metal housing. The control panel is preferably installed spatially within the pump station, but is not limited to this example. The control panel performs control of the valve box (108), control of the pump (104) or various control valves within the pump station, control of the main pipe (105), operation control of the agitator, and switching control for manual / automatic operation mode, etc. The control unit (106) can transmit data on the spraying status and standby status of the spray nozzle (112) detected by the detection unit (113) to the remote control device (107).

[0081] The detection unit (113) may be equipped with at least one detection sensor among a fine dust detection sensor that detects fine dust, a hazardous substance detection sensor that detects at least one selected from sulfur oxides, nitrogen oxides, volatile organic compounds, and radon, and other hazardous substances prescribed by the Ministry of Environment Ordinance, a temperature and humidity detection sensor that detects temperature and humidity, a rain detection sensor that detects the amount of snow or rain, and a road detection sensor that checks the state of snow or rain accumulated on the road surface. A detection signal output from the detection unit (113) is transmitted to the control unit (106) through the communication card box (114).

[0082] Around the detection unit (113), a video surveillance camera (116) that enables real-time confirmation of the spraying status, etc., and an information display board (117) composed of an LED or liquid crystal display device that displays the spraying status of the liquid, the concentration of fine dust, and the weather conditions can be placed.

[0083] The valve box (108) can be installed externally or embedded in a designated area within the solar module. One valve box (108) can be placed for each spray area including a plurality of spray nozzles (120).

[0084] The information display board (118) may be configured as, for example, an LED display board installed on a solar module or a predetermined support. The information display board (118) may display phrases such as "solar panel cleaning," "solar panel cooling," or "solar panel snow removal" to facilitate checking the operating status and management of solar modules.

[0085] Spray nozzles (120) are arranged at set intervals around a plurality of solar panels (1) and connected to a pipe (111). The spray nozzles (120) are arranged close to the tops of the solar panels (1) to spray cleaning liquid or de-icing liquid onto the surface of the solar panels (1). The spray nozzles (120) may be arranged obliquely downward to correspond to the inclination angle of the solar panels (1). Considering that the solar panels (1) are arranged obliquely downward in one direction, it is preferable that the spray angle of the spray nozzles (120) be within 180 degrees.

[0086] As shown in FIGS. 8 and 9, the injection nozzle (120) includes a base part (10), a nozzle block (30) assembled on the lower surface of the base part (10), a disk-shaped valve (V) installed on the nozzle block (30) and positioned within a mounting hole of the base part (10), and a stopper (24) in the form of a bolt member that limits the maximum elevation height of the disk-shaped valve (V).

[0087] The base portion (10) may be preferably arranged parallel to the surface of the solar panel (1) during installation. The base portion (10) is a disc-shaped metal plate with rounded sides. The base portion (10) may be substantially connected to the solar panel (1) through a predetermined bracket (not shown). Bolt fastening holes (12) are formed at set intervals around the base portion (10).

[0088] The nozzle block (30) has a flange (34) having a circular rounded side surface, a step-shaped connecting portion (31) that is integrated with the flange (34) and protrudes from one surface (upper surface) of the flange (34), and a step-shaped connecting portion (36) that is integrated with the flange (34) and protrudes from the other surface (lower surface) of the flange (34). The nozzle block (30) is assembled by fixing the flange (34) to the base (10) with a bolt (40) while the connecting portion (31) is fitted into a mounting hole through the lower portion of the base (10).

[0089] For assembly between the base part (10) and the nozzle block (30), at least two bolt fastening holes (13) are formed around the mounting hole of the base part (10), and correspondingly, at least two bolt penetration holes (33) are formed in the flange (34) of the nozzle block (30).

[0090] The connecting portion (31) is a cylindrical structure that is protruded on the upper surface of the flange (34), fitted into the fixing hole of the base portion (10), and has an internal space for the movement of liquid inside, and an open upper surface. It is preferable that the upper surface of the connecting portion (31) be inclined so that the height gradually increases as it goes outward, so that the spray angle can be adjusted. To this end, the connecting portion (31) has a tapered structure in which the upper surface gradually becomes thinner as it goes upward. This tapered structure can be easily implemented by processing the inner edge of the connecting portion (31) to bevel at a predetermined angle. The inclination angle of the upper surface of the connecting portion (31) should be set so that a low-angle spray can be performed as close to the surface of the solar panel (1) as possible. Considering that the plate (20) of the disc-shaped valve (V) described later has an optimal inclination angle (θ1) of 6˚ to 8˚ with respect to a horizontal line parallel to the surface of the base portion (10), it is preferable that the second inclination angle (θ2) of the tapered portion of the joint portion (31) be 10˚ to 11˚.

[0091] The connecting portion (36) is formed protrudingly on the lower surface of the flange (34) and positioned at the lower portion of the nozzle block (30). The lower end of the connecting portion (36) is open, and a hollow internal space (S1) is formed, which is connected to the internal space (S2) of the connecting portion (31). A female screw portion (37) is formed from the hollow inlet of the connecting portion (36) to a predetermined section, so that a male screw portion (not shown) provided at the end of a high-pressure pipe or high-pressure hose through which liquid is supplied can be screwed to tightly connect the high-pressure pipe or high-pressure hose to the nozzle block (30).

[0092] Inside the nozzle block (30), specifically, in the internal space (S1) of the connecting portion (36), a partition wall (32) is provided with a plurality of holes (33) formed at predetermined intervals to allow the supplied liquid to flow into the internal space (S2) of the connecting portion (31). The partition wall (32) may be formed integrally with the nozzle block (30).

[0093] A disk-shaped valve (V) is provided with a thin disk-shaped plate (20) having a circular edge, and is arranged so as to be openable and closable on the upper surface of a joint (31). The disk-shaped valve (V) includes a cylindrical reinforcing block integrated into the center of the lower surface of the plate (20) to provide rigidity to the plate (20), and a rod-shaped rod (22) extending downward from the reinforcing block with a smaller outer diameter and installed so as to penetrate the center of a bulkhead (32) so as to be able to rise and fall.

[0094] The plate (20) may be configured to have a tapered shape that gradually becomes thinner from the inside toward the circular edge. This shape may be implemented by processing the upper and lower surfaces of the plate (20) to be gradually inclined from the inside to the outside, respectively. In order to spray the liquid at a low angle as closely as possible to the VYAUSD of the solar panel (1), the first inclination angle (θ1) formed on the lower surface adjacent to the circular edge of the plate (20) should be set smaller than the second inclination angle (θ2) formed on the tapered portion of the joint (31). If the first inclination angle (θ1) is relatively large compared to the second inclination angle (θ2), a problem may occur in which the liquid is not sprayed in a horizontal direction but rises into the air. That is, when the first inclination angle (θ1) is relatively small compared to the second inclination angle (θ2), the wedge-shaped space surrounded by the circular edge of the plate (20) and the tapered portion of the joint (31) has a wide entrance and a narrow exit, so that smooth low-angle spraying can be achieved in the horizontal direction. On the other hand, when the first inclination angle (θ1) is relatively large compared to the second inclination angle (θ2), the wedge-shaped space surrounded by the circular edge of the plate (20) and the tapered portion of the joint (31) has an exit that is equal to or wider than the entrance, so that spraying can be achieved in an upwardly surging pattern like a normal fountain.

[0095] The stopper (24) is a nut member screwed into the rod-shaped rod (22) to limit the rising height of the disc-shaped valve (V). Alternatively, the stopper (24) may be composed of a bolt member and screwed into a predetermined nut hole (22a) formed longitudinally in the rod-shaped rod (22). The rising height of the disc-shaped valve (V) can be determined by the fastening position of the stopper (24). That is, when water pressure is applied, the plate (20) is instantly pushed up together with the rod-shaped rod (22) to pop up, and stops when the catch provided in the stopper (24) fastened to the rod-shaped rod (22) comes into contact with the lower surface of the bulkhead (32).

[0096] When the disc-type valve (V) pops up, the maximum rising height matches the gap between the engaging portion of the stopper (24) and the lower surface of the bulkhead (32). In order to prevent the stopper (24) from loosening, it is preferable that the stopper (24) be completely tightened onto the rod-shaped rod (22) so that the engaging portion is in close contact with the lower surface of the rod-shaped rod (22). The engaging portion may be a washer (25) interposed between the head (24a) of the stopper (24) and the lower surface of the rod-shaped rod (22). When the disc-type valve (V) is completely lowered and in a standby state, the rod-shaped rod (22) is configured to protrude from the lower surface of the bulkhead (32) by a predetermined length from the lower surface. Here, since the stopper (24) is tightly screwed onto the rod-shaped rod (22) with the washer (25) fitted, a gap can be secured between the upper surface of the washer (25) and the lower surface of the bulkhead (32). While securing the gap in this way, the stopper (24) is always kept firmly fastened to the rod (22), so that the phenomenon of screw loosening due to vibration can be effectively prevented even without using a fixing means such as adhesive.

[0097] When the disc-shaped valve (V) is completely lowered and in a standby state, the lower end of the reinforcing block does not contact the upper surface of the bulkhead (32) but is spaced apart from it with a gap. At this time, the plate (20) is in a state of tightly closing the upper surface of the joint (31). Here, the gap provides a free space (buffer space) that allows the plate (20) to slightly and elastically bend downward by the gap (G2) when an external force is applied to the disc-shaped valve (V), thereby more effectively preventing damage to the disc-shaped valve (V).

[0098] The disc-shaped valve (V) selectively rises to a height determined by the hydraulic pressure of the liquid and sprays the liquid in all directions of 360 degrees through a fine gap formed under the circular rim. When the disc-shaped valve (V) is raised and opened, a gap of preferably 0.3 to 0.6 millimeters (mm) is formed between the circular rim of the plate (20) and the joint (31), and the liquid can be sprayed in all directions of 360 degrees through the gap. When the hydraulic pressure of the liquid is released, the disc-shaped valve (V) can be lowered and returned to the original position by its own weight. When not spraying, the disc-shaped valve (V) descends and closes the joint (31) of the nozzle block (30), thereby preventing foreign substances from entering the nozzle block (30).

[0099] The plate (20) is processed to have a fine, gradual taper from the center of the upper surface toward the edge, so that it is possible to avoid forming a sharp step with respect to the upper surface of the base portion (10).

[0100] A wall portion (21) is provided on the lower surface of the plate (20). The wall portion (21) partially closes the gap when the disk-shaped valve (V) is completely raised, thereby defining a spray angle. As illustrated in FIGS. 10 and 11, the wall portion (21) can extend vertically downwards by a predetermined length from the outer circumference of one half of the edge of the disk-shaped valve (V). Accordingly, liquid spraying through the disk-shaped valve (V) can be performed through the space (gap) opposite to the wall portion (21). Specifically, the wall portion (21) can be formed as an arc-shaped protruding rib structure adjacent to the edge of the disk-shaped valve (V). Accordingly, the disk-shaped valve (V) can have a spray angle of 180 degrees.

[0101] As shown in Fig. 12, since a plurality of solar panels (1) are arranged in a horizontal direction, it is most preferable that the disk-shaped valve (V) have a spray angle of 180 degrees. When a water pressure of about 5 kgf / cm2 is applied to the disk-shaped valve (V) through the pipe (111), the spray distance of the disk-shaped valve (V) can be about 3 meters (m). Considering these points, the disk-shaped valve (V) is not provided one by one for each solar panel (1), but is sufficiently arranged to be located adjacent to the solar panels (1) but one by one.

[0102] The nozzle block (30) is assembled by a long bolt (40) that screws the flange (34) and the base (10).

[0103] Fig. 9 is a cross-sectional view showing a state in which the disk-shaped valve (V) is operated by the hydraulic pressure of the liquid to open the injection port of the nozzle block (30). Referring to Fig. 9, the liquid supplied through the connecting portion (36) of the nozzle block (30) passes through a plurality of holes (33) formed in the partition wall (32) and flows into the internal space (S2) of the joint portion (31). When the liquid flows in, hydraulic pressure is applied to the internal space (S2) of the joint portion (31), and the disk-shaped valve (V) is instantaneously pushed up to open the upper surface of the joint portion (31). At this time, the disk-shaped valve (V) moves upward by the amount of the gap between the washer (25) coupled to the stopper (24) and the lower surface of the partition wall (32), thereby opening the upper surface of the joint portion (31). The liquid is discharged to the outside through the open portion between the disk-shaped valve (V) and the joint portion (31). That is, the liquid can be sprayed at a spray angle of 180 degrees toward the solar panel (1) through the gap formed under the circular edge of the plate (20) by the rise of the disc-shaped valve (V).

[0104] The solar power supply (2) is a power supply provided to contribute to carbon neutrality, and is placed around a storage tank (100) or a pump (104) to generate direct current electricity through solar power generation. The solar power supply (2) may include a solar panel with a predetermined power generation capacity and a predetermined power conversion device. The direct current electricity generated by the solar power supply (2) can be used as a power source for the operation of at least the pump (104). Furthermore, the direct current electricity generated by the solar power supply (2) can be used as a power source for the operation of the LED mesh (210).

[0105] As described above, the photocatalytic water treatment device (201) can be placed in the internal space of the auxiliary tank (200). When the gravel filter (202) is placed in the photocatalytic water treatment device (201) and the treated water discharge valve (203) is closed, raw water, such as tap water or rainwater storage tank liquid, is supplied through the inlet pipe and stored in the auxiliary tank (200), and water quality purification treatment proceeds naturally by the gravel filter (202) placed so as to be submerged in the water to be treated in the auxiliary tank (200). After the water treatment is purified for several to several tens of hours, the treated water discharge valve (203) is opened so that the purified treated water can be moved to the storage tank (100) and stored. At this time, the movement of the purified treated water can be performed by a predetermined pump. By repeating this process, the purified water collected in the storage tank (100) is transferred to the spray nozzle (120) via the pipe (111) and is sprayed from the spray nozzle (120) in the form of a fine stream of water to wash and cool the surface of the solar panel (1) or remove snow.

[0106] As described above, when the present invention is applied, water purified by the photocatalytic water treatment device (201) and the oxygen nanobubble generator (300) connected to the storage tank can be used for washing, cooling, and snow removal of solar panels. In the photocatalytic water treatment device (201), pollutants can be naturally decomposed and purified by the high specific surface area of ​​the porous gravel immersed in the water, the catalytic action of the ceramic component, and further, the photodegradation reaction of the photocatalyst. In addition, the oxygen nanobubble generator (300) can further purify the water discharged from the photocatalytic water treatment device (201) to supply clean water free of foreign substances to the storage tank (100).

[0107] Although the present invention has been described above with reference to limited embodiments and drawings, the present invention is not limited thereto, and it is obvious that various modifications and variations are possible within the scope of the technical idea of ​​the present invention and the equivalent scope of the patent claims to be described below by a person having ordinary skill in the art to which the present invention pertains.

[0108] When the present invention is applied, by spraying a cleanly purified liquid onto the surface of a solar panel at a wide angle of 180 degrees with simple equipment and low cost, the efficiency of washing, cooling and snow removal can be increased, and the surrounding air, water and soil can be prevented from being polluted by the washing water.

Claims

1. A storage tank for storing liquid containing detergent or deicing liquid; A photocatalytic water treatment device disposed around or inside the storage tank to purify the liquid; An oxygen nanobubble generator that increases the amount of dissolved oxygen in the liquid; Piping installed flush or externally; A pump that transports the washing liquid or snow removal liquid discharged from the storage tank through the pipe; and A plurality of spray nozzles connected to the above pipe and spraying the cleaning liquid or snow removal liquid onto the surface of the target object; The above photocatalytic water treatment device, A box-shaped or mesh-shaped support having an open upper surface and a number of perforations formed on the lower surface and the peripheral surface; A gravel filter having a plurality of porous gravels coated with a photocatalytic material on the surface disposed inside the support; and An LED net is provided in the gravel filter section, in which a plurality of LED elements are arranged in a zigzag shape and installed at set intervals to activate the photocatalytic material by irradiating ultraviolet or visible light on the porous gravel; The above injection nozzle, A base having a flat surface and having a settling hole formed in some part; A nozzle block assembled on the lower surface of the above base portion and having an internal space into which a liquid with a flow rate and pressure controlled by a pump can be introduced; A disc-shaped valve installed in the nozzle block and positioned within the settling hole, selectively rising to a height determined by the hydraulic pressure of the liquid and spraying the cleaning liquid or snow removal liquid to the outside through a gap formed under the circular rim, and returning to the original position when the hydraulic pressure is released; A stopper provided at the bottom of the above disc-type valve to limit the rising height of the above disc-type valve; and A liquid spray device for washing, cooling and removing snow from a facility, characterized by having a wall portion provided on the lower surface of the above-mentioned disc-shaped valve to partially close the gap when the above-mentioned disc-shaped valve is completed rising, thereby defining a spray angle.

2. In paragraph 1, The above porous gravel is SiO 2 , Al 2 O 3 and Fe 2 O 3 A liquid spray device for washing, cooling and removing snow from a facility, characterized by being a porous scoria volcanic eruption containing a component.

3. In paragraph 1, The above photocatalytic material is TiO 2 A liquid spray device for washing, cooling and removing snow from a facility, characterized in that it contains a component.

4. In paragraph 1, It further includes an auxiliary tank, which is arranged at the front end of the storage tank and is in communication with the storage tank and has a smaller storage capacity than the storage tank; A liquid spraying device for washing, cooling and snow removal of a facility, characterized in that the photocatalytic water treatment device is placed within the auxiliary tank.

5. In paragraph 1, A liquid spray device for washing, cooling and removing snow from a facility, characterized in that the wall portion extends vertically downward by a set length from the outer periphery of one half of the edge of the disc-shaped valve and has a spray angle of 180 degrees.

6. In paragraph 1, A liquid spraying device for washing, cooling and removing snow of a facility, characterized in that the above wall portion is formed of an arc-shaped protruding rib adjacent to the edge of the above disc-shaped valve.

7. In paragraph 1, A liquid spraying device for washing, cooling and removing snow of a facility, further comprising a remote control device comprising a remote control system including a mobile phone or a central control device that performs communication with a control unit and remotely controls the pump; 8. In paragraph 7, A liquid spray device for washing, cooling and snow removal of a facility, further comprising a detection unit for detecting the spraying state and standby state of the spray nozzle.

9. In paragraph 1, The above facility is a solar power generation facility. The above multiple injection nozzles are arranged at set intervals around a plurality of solar modules, At least a solar power supply for powering said pump; and A water temperature controller for maintaining the temperature of the liquid within a set value; A liquid spraying device for washing, cooling and snow removal of a facility, characterized in that the above-mentioned water temperature controller is a cooling coil or an air-cooled radiator that cools the liquid and maintains it at a temperature of 20℃ or lower.

Images