Cleaning systems and photovoltaic systems

Abstract

The utility model discloses a cleaning system and a photovoltaic system, wherein the cleaning system includes a water source module, a detergent module, a water storage tank, a water inlet pipeline and a cleaning module, wherein the water storage tank has a water inlet end and a water outlet end; one end of the water inlet pipeline is connected to the water source module, and the other end is connected to the water inlet end; a confluence mixing position is provided on the water inlet pipeline, and the detergent module is connected to the confluence mixing position to inject detergent through the confluence mixing position, so that the detergent is mixed with water in the water inlet pipeline and then flows into the water storage tank. The cleaning module is connected to the water outlet end of the water storage tank. The technical solution of the utility model can improve the mixing uniformity of the detergent in water.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic cleaning, in particular to a cleaning system and a photovoltaic system. Background Art

[0002] Existing photovoltaic cleaning systems such as Figure 1 As shown, a water pipe is led out from the water source module, and because some photovoltaic modules may be far away from the water source, resulting in insufficient or unstable water pressure during cleaning, a water tank is generally added in the middle to facilitate further pressurized water spraying. To ensure the cleaning effect, detergent needs to be added to the water flow in the photovoltaic cleaning system, but the conventional method used by the existing photovoltaic cleaning system to add detergent to the cleaning water is to directly drip the detergent into the water tank. This addition method often causes the detergent to not dissolve evenly in the water, resulting in poor cleaning effect. Utility Model Content

[0003] The main purpose of the utility model is to provide a cleaning system, aiming to improve the mixing uniformity of detergent in water.

[0004] To achieve the above purpose, the cleaning system proposed by the utility model includes:

[0005] Water source module and detergent module;

[0006] A water storage tank, the water storage tank having a water inlet end and a water outlet end;

[0007] a water inlet pipeline, one end of which is connected to the water source module, and the other end of which is connected to the water inlet end; a confluence and mixing position is provided on the water inlet pipeline, and the detergent module is connected to the confluence and mixing position so as to inject detergent through the confluence and mixing position, so that the detergent is mixed with water in the water inlet pipeline and then flows into the water storage tank; and

[0008] The cleaning module is connected to the water outlet of the water storage tank.

[0009] Optionally, the confluence and mixing position is provided with a self-priming structure, the detergent module is connected to the water inlet pipeline via the self-priming structure, and the self-priming structure is used to suck detergent from the detergent module.

[0010] Optionally, the self-priming structure is configured as a Venturi structure.

[0011] Optionally, the Venturi structure includes a contraction section, a throat section, a diffusion section and a liquid intake pipe section which are connected in sequence, the axial direction of the liquid intake pipe section is arranged at an angle with the axial direction of the throat section, and one end of the liquid intake pipe section is at least connected to the throat section, and the other end is connected to the detergent module.

[0012] Optionally, the throat section is configured as a nozzle arranged in the contraction section, the nozzle and the diffusion section are provided with a gap, and one end of the liquid intake pipe section close to the throat section is at least arranged around the outer periphery of the throat section and connected to the gap between the nozzle and the diffusion section.

[0013] Optionally, a filtering device is installed in the water tank, and the filtering device divides the water storage chamber of the water tank into a first chamber and a second chamber, the water inlet end is arranged in the first chamber, and the water outlet end is arranged in the second chamber.

[0014] Optionally, the filtering device is configured as a multi-layer filter structure arranged at intervals; and / or,

[0015] The filtering device is detachably mounted on the water storage tank.

[0016] Optionally, a water level monitoring device is further provided in the water storage chamber, and the water level monitoring device is used to monitor the water level of the water storage chamber.

[0017] Optionally, the water level monitoring device comprises a high water level sensor, a middle water level sensor and a low water level sensor which are arranged at intervals along the depth direction of the water storage chamber, the cleaning system controls the water source module to work according to the high water level sensor, and the cleaning system controls the cleaning module to work according to the middle water level sensor and the low water level sensor; and / or,

[0018] The water level monitoring device is arranged in the second chamber.

[0019] Optionally, the cleaning module includes a driving device, a cleaning pipeline and at least one water spray unit, the cleaning pipeline connects the water spray unit and the water outlet, and the driving device is arranged in the cleaning pipeline to drive the water in the cleaning pipeline to flow toward the water spray unit.

[0020] Optionally, the water spray unit is configured in plurality, and the plurality of water spray units are arranged in parallel; and / or,

[0021] The water spray unit comprises a spray head, a water guide and a water spray control switch.

[0022] Optionally, the cleaning pipeline is further provided with a flow meter, and the flow meter is provided between the driving device and the water spray unit; and / or,

[0023] The cleaning pipeline is further provided with a pressure gauge, which is arranged between the driving device and the water spray unit; and / or,

[0024] The cleaning pipeline is further provided with a check valve, which is arranged between the driving device and the water spray unit; and / or,

[0025] The cleaning system is also provided with a drain valve, and the drain valve is used to discharge the liquid in the cleaning system when the cleaning system stops working.

[0026] The utility model also provides a photovoltaic system, comprising a photovoltaic module and the cleaning system as described above, wherein the cleaning system is used for cleaning photovoltaic components of the photovoltaic module.

[0027] The technical solution of the utility model is to set up a cleaning system, which includes a water source module, a detergent module, a water storage tank, a water inlet pipeline and a cleaning module. The water storage tank has a water inlet end and a water outlet end; one end of the water inlet pipeline is connected to the water source module, and the other end is connected to the water inlet end of the pipe. A confluence mixing position is provided on the water inlet pipeline. The detergent module is connected to the confluence mixing position to inject detergent through the confluence mixing position, so that the detergent is mixed with water in the water inlet pipeline and flows into the water storage tank, and the cleaning module is connected to the water outlet end of the water storage tank, and the cleaning module is used to clean the photovoltaic module. The water source module is used to supply water to the water storage tank, so the water source module is connected to the water inlet end of the water storage tank through the water inlet pipeline, and the water inlet pipeline has a confluence mixing position, which is used to mix water and detergent, so the detergent module is connected to the confluence mixing position, so that the detergent is mixed before the water enters the water storage tank, and then further mixed by the water flow speed after entering the water storage tank, thereby improving the mixing uniformity of the detergent in the water. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the utility model 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 utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0029] Figure 1 It is a structural schematic diagram of a cleaning system in the prior art;

[0030] Figure 2 This is a schematic structural diagram of an embodiment of the cleaning system of the utility model;

[0031] Figure 3 for Figure 2 Cross-sectional view of the Chinese Qiuli structure;

[0032] Figure 4 for Figure 2 Assembly drawing of the intermediate water storage tank and the filter device;

[0033] Figure 5 for Figure 2 Schematic diagram of the structure of the middle water storage tank;

[0034] Figure 6for Figure 2 Schematic diagram of the structure of the filtration device.

[0035] Description of Figure Numbers:

[0036]

[0037]

[0038] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0040] It should be noted that if the embodiments of the present invention involve directional indications such as up, down, left, right, front, back, etc., then the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.

[0041] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text is to include three parallel solutions, taking "A and / or B as an example", including solution A, or solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0042] like Figure 1As shown, in the prior art, a water inlet pipe is led out from the water source module 10 to connect to the water tank 11, and a cleaning pipe 12 is led out from the water tank 11, and the cleaning pipe 12 extends to the photovoltaic module and passes through the array formed by multiple photovoltaic modules 14, and multiple cleaning nozzles 13 are arranged at intervals on the cleaning pipe 12, and the cleaning nozzles 13 are used to clean the photovoltaic modules 14. Because some photovoltaic modules 14 may be far away from the water source, resulting in insufficient water pressure or unstable water pressure during cleaning, a water tank 11 is generally added between the pipes to facilitate further pressurized water spraying. To ensure the cleaning effect, detergent needs to be added to the water flow in the photovoltaic cleaning system, but the conventional method used by the existing photovoltaic cleaning system to add detergent to the cleaning water is: directly dripping detergent into the water tank 11. This addition method often causes the detergent to be not evenly dissolved in the water, resulting in poor cleaning effect. To improve the uniformity of the detergent dissolved in the water, it is often necessary to set a stirring device in the water tank 11. The installation of the stirring device is complicated, which greatly increases the cleaning cost of the photovoltaic cleaning system.

[0043] In view of this, the present invention provides a cleaning system 20 .

[0044] In the embodiment of the present utility model, Figures 2 to 6 As shown, the cleaning system 20 includes a water source module 21, a detergent module 22, a water storage tank 23, a water inlet pipeline 24 and a cleaning module 26. The water storage tank 23 has a water inlet end 231 and a water outlet end 232. One end of the water inlet pipeline 24 is connected to the water source module 21, and the other end is connected to the water inlet end 231. A confluence mixing position 241 is provided on the water inlet pipeline 24. The detergent module 22 is connected to the confluence mixing position 241 to inject detergent through the confluence mixing position 241, so that the detergent is mixed with water in the water inlet pipeline 24 and then flows into the water storage tank 23. The cleaning module 26 is connected to the water outlet end 232 of the water storage tank 23.

[0045] Specifically, the water source module 21 is used to supply water to the water tank 23, so the water source module 21 is connected to the water inlet end 231 of the water tank 23 through the water inlet pipe 24, and the water inlet pipe 24 has a confluence mixing position 241, and the confluence mixing position 241 is used to mix water and detergent, so the detergent module 22 is connected to the confluence mixing position 241, so that the detergent is mixed before the water enters the water tank 23, and then further mixed by using the water flow velocity after entering the water tank 23, thereby improving the mixing uniformity of the detergent in the water. Therefore, the confluence and mixing position 241 can be configured as a three-way pipe arranged in the water inlet pipe 24, and the three-way pipe is connected to the water source module 21, the detergent module 22, and the water tank 23 respectively. However, in order to ensure that water and detergent can smoothly enter the water tank 23 through the three-way pipe, the water source module 21 and the detergent module 22 can both be provided with a water pump structure, so that water can be smoothly pumped into the water tank 23 respectively, and mixed in the three-way pipe, and can be further mixed when flowing into the water tank 23 from the water inlet pipe 24, thereby ensuring the uniform mixing of the detergent in the water.

[0046] It is understandable that in order to facilitate water to enter the water tank 23, the water inlet end 231 should always be located above the water surface in the water tank 23 (if it is located below the water surface, a larger pressure is required to pump water into the water tank 23, resulting in increased cleaning costs). Therefore, when water enters the water tank 23 from the water inlet end 231, the water surface of the water tank 23 can be further agitated, thereby further mixing the detergent evenly. Of course, in other embodiments, the water inlet end 231 can also be located below the water surface in the water tank 23. Similarly, in order to facilitate water to flow out of the water tank 23, the water outlet end 232 should always be located below the water surface in the water tank 23. Of course, in other embodiments, the water outlet end 232 can also be located above the water surface in the water tank 23.

[0047] The water inlet 231 is provided on the water tank 23. To reduce water pollution, a cover plate or a filter structure is usually provided at the top opening of the water tank 23. The water inlet 231 can be configured as a water inlet provided on the side or top of the water tank 23. The water inlet pipe 24 is installed at the water inlet, or the water inlet pipe 24 can directly extend into the water tank 23. Similarly, the water outlet 232 can be configured as a water outlet provided on the side or bottom of the water tank 23.

[0048] The cleaning module 26 is connected to the water outlet 232 of the water storage tank 23, and the cleaning module 26 is used to clean the photovoltaic module. In one embodiment, the cleaning module 26 includes a driving device 261, a cleaning pipeline 262 and at least one water spray unit 263, the cleaning pipeline 262 connects the water spray unit 263 and the water outlet 232, and the driving device 261 is arranged in the cleaning pipeline 262 to drive the water in the cleaning pipeline 262 to flow to the water spray unit 263. Specifically, the water spray unit 263 is used to clean the photovoltaic module, the cleaning pipeline 262 connects the water spray unit 263 and the water outlet 232, so as to introduce the water in the water storage tank 23 into the water spray unit 263, and the driving device 261 is arranged in the cleaning pipeline 262, and the driving device 261 is generally configured as a water pump, so as to pump the water in the water storage tank 23 into the water spray unit 263, thereby providing power for the water flow in the water spray unit 263, ensuring the impact of the water flow of the water spray unit 263, so as to improve the cleaning effect. The cleaning module 26 may have one water spray unit 263 or multiple water spray units 263, which may be flexibly arranged according to the distribution mode and laying area of ​​the photovoltaic modules.

[0049] In one embodiment, a plurality of water spray units 263 are configured, and the plurality of water spray units 263 are arranged in parallel. Specifically, the water spray units 263 are arranged in parallel, thereby reducing the length of the cleaning pipeline 262 and reducing the difference in flow paths between different water spray units 263, which can reduce the driving force required by the driving device 261 and the difference in water flow impact strength between different water spray units 263.

[0050] In this embodiment, the water spray unit 263 includes a spray head 264, a water guide 265 and a water spray control switch 266. Specifically, the spray head 264 is used to spray the surface of the photovoltaic module. The water guide 265 is installed on the photovoltaic module to clean the dust accumulation zone of the photovoltaic module. The water spray control switch 266 is used to control the operation of the spray head 264, so that the multiple water spray units 263 can work independently. Among them, the water spray control switch 266 can be configured as a valve body structure such as a solenoid valve.

[0051] In one embodiment, the confluence and mixing position 241 is provided with a self-priming structure, and the detergent module 22 is connected to the water inlet pipe 24 through the self-priming structure, and the self-priming structure is used to suck detergent from the detergent module 22. Specifically, the self-priming structure can automatically absorb the detergent in the detergent module 22, so that the detergent module 22 does not need to be provided with a driving structure such as a water pump, thereby reducing the setting of the driving structure and further reducing the cleaning cost of the photovoltaic module.

[0052] Furthermore, the self-priming structure is configured as a Venturi structure 242. The Venturi structure 242 has a simple structure, low cost, and is easy to install, thereby ensuring the uniformity of the mixing of the detergent in the water and reducing the cleaning cost of the photovoltaic module.

[0053] In another embodiment, an inner diameter reducing section may be provided in the converging and mixing position 241, or a blocking portion may be provided in the converging and mixing position 241 to reduce the inner diameter of part of the converging and mixing position 241. The detergent module 22 is provided on the side of the inner diameter reducing section or the blocking portion close to the water storage tank 23, so that the flow velocity of water increases after passing through the inner diameter reducing section or the blocking portion, thereby forming a negative pressure zone, and then automatically absorbing the detergent in the detergent module 22.

[0054] When the self-priming structure is configured as a Venturi structure 242, in one embodiment, the Venturi structure 242 includes a contraction section 243, a throat section 244, a diffusion section 245 and a liquid collection pipe section 246 which are connected in sequence. The axial direction of the liquid collection pipe section 246 is set at an angle with the axial direction of the throat section 244, and one end of the liquid collection pipe section 246 is at least connected to the throat section 244, and the other end is connected to the detergent module 22. Specifically, the contraction section 243 is the water inlet section, which is connected to the water source module 21, and the diffusion section 245 is the water outlet section, which is connected to the water storage tank 23. Water flows out of the water source module 21 and then flows into the contraction section 243. The inner diameter of the contraction section 243 is set to be smaller in the direction close to the throat section 244, so that the water flow velocity of the contraction section 243 increases, and then further flows into the throat section 244, the water flow velocity further increases, and then sprays out from the throat section 244, thereby forming a negative pressure area, and then automatically absorbing the detergent in the detergent module 22. Therefore, the detergent module 22 is at least connected to the throat section 244, so a liquid intake pipe section 246 is provided, one end of the liquid intake pipe section 246 is at least connected to the throat section 244, and the other end is connected to the detergent module 22, thereby facilitating the installation of the detergent module 22 and the Venturi structure 242.

[0055] Among them, the inner diameter of the diffusion section 245 is also larger than the inner diameter of the throat section 244, and the inner diameter of the diffusion section 245 is set to be larger in the direction away from the throat section 244. Preferably, the inner diameter of the end of the diffusion section 245 close to the throat section 244 should be larger than the inner diameter of the throat section 244, so as to further improve the mixing uniformity of the detergent in the water. Furthermore, the inner diameter of the end of the diffusion section 245 close to the throat section 244 and the inner diameter of the throat section 244 are set to change suddenly. And the inner diameter of the contraction section 243 can be set to gradually decrease in the direction close to the throat section 244, or it can be set to change suddenly; the corresponding inner diameter of the diffusion section 245 can be set to gradually increase in the direction away from the throat section 244, or it can be set to change suddenly.

[0056] Further, the throat section 244 is configured as a nozzle disposed in the contraction section 243, the nozzle and the diffuser section 245 are provided with a gap, and the end of the liquid taking pipe section 246 close to the throat section 244 is at least arranged around the outer periphery of the throat section 244, and is connected to the gap between the nozzle and the diffuser section 245. That is, the liquid taking pipe section 246 can be arranged between the nozzle and the diffuser section 245, so that the liquid taking pipe section 246 can be arranged around the outer periphery of the nozzle, or around the outer periphery of the throat section 244 and the diffuser section 245, so as to facilitate the automatic absorption of the detergent in the detergent module 22, and also promote the uniform mixing of the detergent in the water. In other embodiments, a mixing zone can also be provided between the throat section 244 and the diffuser section 245, so as to further promote the uniform mixing of the detergent in the water.

[0057] In one embodiment, a filter device 233 is installed in the water tank 23, and the filter device 233 divides the water storage chamber of the water tank 23 into a first chamber 235 and a second chamber 236, the water inlet end 231 is arranged in the first chamber 235, and the water outlet end 232 is arranged in the second chamber 236. Specifically, in order to reduce the cleaning cost, the water in this solution is mostly industrial water, which contains impurities such as sand and gravel, so the filter device 233 is arranged in the water tank 23, and the filter device 233 can effectively filter the impurities in the water and reduce the possibility of clogging of the cleaning system 20. And the filter device 233 divides the water storage chamber into the first chamber 235 and the second chamber 236. It can be understood that the first chamber 235 and the second chamber 236 are not completely isolated, and water is allowed to flow between the two. The water inlet 231 is located in the first chamber 235, and the water outlet 232 is located in the second chamber 236, that is, the water inlet 231 and the water outlet 232 are located on opposite sides of the filter device 233. Since the water surface is easily agitated when water enters the water inlet 231, the filter device 233 is set, which can not only filter impurities in the water, but also provide buffering and blocking effects for the water flow flowing into the second chamber 236, thereby further stabilizing the water surface of the second chamber 236.

[0058] Furthermore, the filter device 233 is configured as a multi-layer filter structure arranged at intervals. On the one hand, the filtering effect of the filter device 233 is improved, and on the other hand, it can further provide a buffer and blocking effect for the water flow into the second chamber 236, and further stabilize the water surface of the second chamber 236. In order to facilitate installation, the multi-layer filter structure can be integrally formed. Of course, in other embodiments, the filter device 233 can also be configured as a single-layer filter structure.

[0059] In one embodiment, the filter device 233 is detachably mounted on the water storage tank 23. This facilitates the installation and removal of the filter device 233. In this embodiment, the wall of the water storage cavity is provided with a guide limit groove 234, and the edge of the filter device 233 is slidably mounted in the guide limit groove 234, which not only facilitates the installation of the filter device 233, but also reduces the possibility of accidental removal of the filter device 233. In other embodiments, the filter device 233 can also be installed by a snap-fit ​​structure. In another embodiment, the filter device 233 and the water storage tank 23 are integrally formed.

[0060] In one embodiment, a water level monitoring device 250 is further provided in the water storage chamber, and the water level monitoring device 250 is used to monitor the water level of the water storage chamber. The water level monitoring device 250 can monitor the water level change in the water storage tank 23, and thus control the operation of the water source module 21 and the cleaning module 26 according to the water level change in the water storage tank 23, thereby reducing the situation where the water in the water storage tank 23 is too little, resulting in insufficient water supply to the cleaning module 26, and reducing the possibility of overflowing the water storage tank 23 due to excessive water in the water storage tank 23.

[0061] In order to reduce the influence of the turbulence of the water surface caused by the water inlet 231 on the accuracy of the water level monitoring device 250, in one embodiment, the water level monitoring device 250 is arranged in the second chamber 236. Due to the buffering and blocking effect of the filter device 233, the water surface of the second chamber 236 is further stabilized, thereby improving the detection accuracy of the water level monitoring device 250, realizing the precise control of the water level monitoring device 250, and improving the stability of the operation of the cleaning system 20.

[0062] Furthermore, the water level monitoring device 250 includes a high water level sensor 251, a middle water level sensor 252 and a low water level sensor 253 which are arranged at intervals along the depth direction of the water storage chamber. The cleaning system 20 controls the water source module 21 to work according to the high water level sensor 251, and the cleaning system 20 controls the cleaning module 26 to work according to the middle water level sensor 252 and the low water level sensor 253. Specifically, the cleaning system 20 controls the water source module 21 to work according to the high water level sensor 251. When the water level in the water storage chamber reaches the high water level, the cleaning system 20 controls the water source module 21 to stop working, thereby stopping the water supply to the water storage tank 23, reducing the possibility of overflow of the water storage tank 23 due to excessive water in the water storage tank 23; when the water level in the water storage chamber is lower than the high water level, the cleaning system 20 controls the water source module 21 to start working, so that the water source module 21 supplies water to the water storage tank 23 to ensure that the water storage tank 23 has sufficient water. The cleaning system 20 controls the cleaning module 26 to work according to the middle water level sensor 252 and the low water level sensor 253. When the water level in the water storage chamber is higher than the middle water level, the water in the water storage tank 23 is sufficient, and the cleaning system 20 controls the cleaning module 26 to start working; when the water level in the water storage chamber is lower than the low water level, the water in the water storage tank 23 is insufficient, and the cleaning system 20 controls the cleaning module 26 to stop working. Controlling the cleaning module 26 to work, that is, controlling the opening and closing of the driving device 261 on the cleaning pipeline 262.

[0063] Among them, the high water level sensor 251, the middle water level sensor 252 and the low water level sensor 253 are arranged at intervals along the depth direction of the water storage chamber. It should be noted that the high water level sensor 251, the middle water level sensor 252 and the low water level sensor 253 can be on the same straight line, or they can be staggered along the depth direction of the water storage chamber, or at least two of the high water level sensor 251, the middle water level sensor 252 and the low water level sensor 253 are arranged on different side walls of the water storage chamber.

[0064] In one embodiment, a flow meter 267 is further provided on the cleaning pipeline 262, and the flow meter 267 is provided between the driving device 261 and the water spray unit 263. The flow meter 267 can count the water consumption of the cleaning system to facilitate the operator to monitor the water volume. The flow meter 267 is provided between the driving device 261 and the water spray unit 263, and can effectively monitor the water volume of the photovoltaic module in real time.

[0065] Furthermore, a pressure gauge 268 is provided on the cleaning pipeline 262, and the pressure gauge 268 is provided between the driving device 261 and the water spraying unit 263. The pressure gauge 268 can feedback control the unit water flow of the cleaning pipeline 262 according to the operation of the driving device 261, so as to realize the pressure control of each water spraying unit 263.

[0066] Furthermore, a check valve 269 is provided on the cleaning pipeline 262, and the check valve 269 is provided between the driving device 261 and the water spray unit 263. The check valve 269 can effectively prevent the water flow from moving in the reverse direction, thereby reducing the possibility of water flow turbulence in the cleaning pipeline 262.

[0067] Furthermore, the cleaning system is also provided with a drain valve 27, which is used to discharge the liquid in the cleaning system when the cleaning system stops working. The drain valve 27 is used to drain the water in the cleaning system when the cleaning system stops working, so as to reduce the possibility of damage to the cleaning system due to low temperature in winter. In order to ensure that the water in the cleaning system is drained smoothly, the drain valve 27 can be provided with multiple drain valves 27, and multiple drain valves 27 are arranged at intervals on the cleaning pipeline 262, the water inlet pipeline 24, the water storage tank 23 and the cleaning unit. The drain valve 27 can be configured as a solenoid valve.

[0068] The utility model also provides a photovoltaic system, which includes a photovoltaic module and a cleaning system 20. The specific structure of the cleaning system 20 refers to the above embodiment. Since the photovoltaic system adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here. Among them, the cleaning system 20 is used to clean the photovoltaic components of the photovoltaic module.

[0069] The above are only preferred embodiments of the present invention, and do not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly used in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A cleaning system, characterized in that: include: Water source module and detergent module; A water storage tank, the water storage tank having a water inlet end and a water outlet end; a water inlet pipeline, one end of which is connected to the water source module, and the other end of which is connected to the water inlet end; a confluence and mixing position is provided on the water inlet pipeline, and the detergent module is connected to the confluence and mixing position so as to inject detergent through the confluence and mixing position, so that the detergent is mixed with water in the water inlet pipeline and then flows into the water storage tank; and The cleaning module is connected to the water outlet of the water storage tank.

2. The cleaning system according to claim 1, characterized in that: The confluence and mixing position is provided with a self-priming structure, the detergent module is connected to the water inlet pipeline through the self-priming structure, and the self-priming structure is used to inhale detergent from the detergent module.

3. The cleaning system according to claim 2, characterized in that: The self-priming structure is configured as a Venturi structure.

4. The cleaning system according to claim 3, characterized in that: The Venturi structure includes a contraction section, a throat section, a diffusion section and a liquid intake pipe section which are connected in sequence. The axial direction of the liquid intake pipe section is arranged at an angle with the axial direction of the throat section, and one end of the liquid intake pipe section is at least connected to the throat section, and the other end is connected to the detergent module.

5. The cleaning system according to claim 4, characterized in that: The throat section is configured as a nozzle arranged in the contraction section, the nozzle and the diffusion section are provided with a gap, and one end of the liquid intake pipe section close to the throat section is at least arranged around the outer circumference of the throat section and connected to the gap between the nozzle and the diffusion section.

6. The cleaning system according to claim 1, characterized in that: A filter device is installed in the water tank, and the filter device divides the water storage chamber of the water tank into a first chamber and a second chamber. The water inlet is arranged in the first chamber, and the water outlet is arranged in the second chamber.

7. The cleaning system according to claim 6, characterized in that: The filtering device is configured as a multi-layer filter screen structure arranged at intervals; and / or, The filtering device is detachably mounted on the water storage tank.

8. The cleaning system according to claim 6, characterized in that: A water level monitoring device is also provided in the water storage chamber, and the water level monitoring device is used to monitor the water level of the water storage chamber.

9. The cleaning system according to claim 8, characterized in that: The water level monitoring device comprises a high water level sensor, a middle water level sensor and a low water level sensor arranged at intervals along the depth direction of the water storage chamber, the cleaning system controls the water source module to work according to the high water level sensor, and the cleaning system controls the cleaning module to work according to the middle water level sensor and the low water level sensor; and / or, The water level monitoring device is arranged in the second chamber.

10. The cleaning system according to any one of claims 1 to 9, characterized in that: The cleaning module includes a driving device, a cleaning pipeline and at least one water spray unit. The cleaning pipeline connects the water spray unit and the water outlet. The driving device is arranged in the cleaning pipeline to drive the water in the cleaning pipeline to flow toward the water spray unit.

11. The cleaning system according to claim 10, characterized in that: The water spraying units are provided in plurality, and the plurality of water spraying units are arranged in parallel; and / or, The water spray unit comprises a spray head, a water guide and a water spray control switch.

12. The cleaning system according to claim 10, characterized in that: The cleaning pipeline is further provided with a flow meter, which is arranged between the driving device and the water spray unit; and / or, The cleaning pipeline is further provided with a pressure gauge, which is arranged between the driving device and the water spray unit; and / or, The cleaning pipeline is further provided with a check valve, which is arranged between the driving device and the water spray unit; and / or, The cleaning pipeline is also provided with a drain valve, and the drain valve is used to discharge the liquid in the cleaning pipeline when the cleaning pipeline stops working.

13. A photovoltaic system, characterized in that: The invention comprises a photovoltaic module and a cleaning system according to any one of claims 1 to 12, wherein the cleaning system is used for cleaning photovoltaic components of the photovoltaic module.

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