Energy-saving building photovoltaic curtain wall with automatic cleaning function

Abstract

The invention relates to the technical field of building curtain walls, in particular to an automatic-cleaning energy-saving building photovoltaic curtain wall which comprises a photovoltaic module and a support arranged on the periphery of the photovoltaic module in a sleeving mode. A containing groove is horizontally formed in the upper portion of the support, a plurality of sprayers capable of swinging in a reciprocating mode are evenly distributed in the containing groove in the horizontal direction of the containing groove, the sprayers are used for spraying cleaning liquid to a photovoltaic module, a hydraulic unit used for driving the sprayers to swing is arranged on the support, and the hydraulic unit and the sprayers work in rainy days. According to the photovoltaic curtain wall, it is guaranteed that the overall size of the photovoltaic curtain wall is not too large, meanwhile, normal heat dissipation of the photovoltaic curtain wall is guaranteed, cleaning liquid is sprayed out in a swinging mode through the spray heads during rainfall, cleaning of a photovoltaic assembly is completed, and the use amount of the cleaning liquid is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of building curtain walls, in particular to an automatic cleaning energy-saving building photovoltaic curtain wall. Background Art

[0002] After long-term use, the surface of the glass curtain wall will become very dirty, and it needs to be cleaned. The existing glass curtain wall cleaning method is mainly through manual cleaning, which is to install a hanging basket and a hanging board, and the staff stand on the hanging board and use wiping tools and cleaning chemicals to clean the glass curtain wall from top to bottom row by row. This increases the labor intensity of the staff. At the same time, after long-term work, the staff are more tired, which increases the danger of the staff. Moreover, the cleaning fluid needs to be replaced after each cleaning period, resulting in a waste of time and reducing the work efficiency of the staff.

[0003] Chinese patent publication number CN215166936U discloses an energy-saving, self-cleaning photovoltaic curtain wall for buildings, comprising a mounting frame, a photovoltaic curtain wall panel disposed on the top of the mounting frame, and a cleaning device disposed within the bottom of the photovoltaic curtain wall panel. The cleaning device comprises a fixed frame, a chute, a connecting rod, a connecting block, a cleaning block, a gear, a rack, and a motor. The chute is located at the top of the fixed frame, the rack is fixedly connected to the top of the chute, the gear meshes with the top of the rack, the connecting rod is fixedly connected to the side of the gear, the connecting block is fixedly connected to the side of the connecting rod, the cleaning block is fixedly connected to the bottom of the connecting block, and the output shaft of the motor is rotatably connected to the side of the gear.

[0004] Although the above scheme can automatically clean the photovoltaic curtain wall, it is necessary to set a circle of cleaning equipment on the periphery of the photovoltaic curtain wall body, and the size of the cleaning equipment is large. Most photovoltaic curtain walls are installed in large numbers and are connected in sequence. If a cleaning device is set on the outside of each photovoltaic curtain wall, the actual number of photovoltaic curtain walls installed will be limited. At the same time, since there are multiple motors in the cleaning equipment, the use cost of each photovoltaic curtain wall is extremely high. At the same time, the motors in the cleaning equipment need to be regularly inspected and maintained, and the cleaning fluid cannot be automatically replenished. After a period of use, the cleaning equipment can no longer clean the photovoltaic curtain wall. Secondly, if a fixed nozzle is used to spray the photovoltaic module, too many holes for installing the nozzle will need to be opened on the bracket profile. Otherwise, there will be a cleaning blind spot when the nozzle sprays the cleaning fluid, and too many holes on the bracket profile will reduce the strength of the bracket profile. Summary of the Invention

[0005] In response to the above problems, an automatic cleaning energy-saving building photovoltaic curtain wall is provided. A receiving groove is opened on the upper part of the bracket, and a plurality of reciprocatingly swinging nozzles are arranged in the receiving groove. At the same time, a hydraulic unit for driving the nozzle to swing is provided on one side of the nozzle. The hydraulic unit drives the nozzle to swing by flowing liquid, that is, the hydraulic unit does not generate heat when driving the nozzle to swing, ensuring that the photovoltaic module can dissipate heat normally. When cleaning the surface of the photovoltaic module, the nozzle and the hydraulic unit are only started when there is continuous rainfall outside, so that the rainwater can first wet and wash away the dust on the surface of the photovoltaic module, and then the nozzle sprays the cleaning liquid. The cleaning liquid softens the stubborn stains attached to the surface of the photovoltaic module and is washed away by the rainwater, reducing the use of the cleaning liquid. At the same time, the nozzle is in a reciprocating swinging state when spraying cleaning, ensuring that the sprayed cleaning liquid can fully cover the surface of the photovoltaic module under the premise of setting a small number of nozzles, thereby reducing the number of nozzles set and ultimately reducing the cost of a single photovoltaic curtain wall.

[0006] In order to solve the problems of the prior art, the present invention provides an energy-saving photovoltaic curtain wall for buildings that automatically cleans, comprising a photovoltaic module, a bracket mounted on the periphery of the photovoltaic module, and a rain detection sensor; a receiving groove is horizontally provided on the upper portion of the bracket, and a plurality of nozzles capable of reciprocating and swinging are evenly arranged in the receiving groove along the horizontal direction of the receiving groove, the nozzles being used to spray cleaning liquid on the photovoltaic module, a hydraulic unit for driving the nozzles to swing is provided on the bracket, a controller for activating the hydraulic unit is provided on one side of the rain detection sensor, and when the rain detection sensor detects rain, the controller controls the driving of the hydraulic unit and the swinging of the nozzles. Preferably, the hydraulic unit comprises a swing shell provided on the bracket, the interior of the swing shell being a fan-shaped structural cavity, a swing blade being provided in the fan-shaped structural cavity and rotating around the fan-shaped structural cavity, and the hydraulic unit further comprises a first water pump for injecting or discharging a fixed amount of liquid from one end of the swing shell.

[0007] Preferably, a rotating ring is provided on the swing shell for rotation along the axis of the fan-shaped structure cavity, the swing blades are fixedly provided on the rotating ring, an extension tube is horizontally provided on the nozzle and passes through the inner ring of the rotating ring, the extension tube is connected to the nozzle, the extension tube is fixedly connected to the rotating ring, and a water supply pipe for supplying cleaning liquid to the extension tube is provided at the end of the extension tube away from the nozzle, and the extension tube and the water supply pipe are rotated in coordination.

[0008] Preferably, an extension rod is fixedly provided on the side wall of the extension tube along the radial direction of the extension tube, and a gravity block is fixedly provided at the end of the extension rod. After the rotating ring rotates under the action of the second water pump, the gravity block provides a reset rotational force to the extension tube through the extension rod.

[0009] Preferably, a two-position three-way reversing valve is provided between the first water pump and the swing housing. After the first water pump injects liquid into the swing housing through the reversing valve, the reversing valve changes position and the liquid in the swing housing can be discharged freely through the reversing valve.

[0010] Preferably, an inflow end and an outflow end are provided on the swing shell, and a limit block is fixedly provided on the bracket to limit the inclination angle of the nozzle when the first water pump is not started. When the nozzle is limited by the limit block, the swing blade is located at the upper part of the inflow end, and the inflow end and the outflow end are in a non-connected state.

[0011] Preferably, a deceleration unit capable of reducing the swing speed of the nozzle is provided on one side of the nozzle. The deceleration unit includes an arc-shaped shell arranged on the bracket around the axis of the extension tube, an arc-shaped rod fixedly connected to the gravity block is slidingly arranged in the arc-shaped shell, and an overflow groove connected to the arc-shaped shell is provided on one side of the end of the arc-shaped shell.

[0012] Preferably, a liquid storage cavity is provided at the end of the arc-shaped shell, a communication port is provided at the upper end of the liquid storage cavity, the liquid storage cavity is communicated with the arc-shaped shell through the communication port, and a sphere is provided on the flow port.

[0013] Preferably, a telescopic cavity is provided at the bottom of the liquid storage cavity.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention provides a receiving groove on the upper part of the bracket, and arranges a plurality of reciprocatingly swinging nozzles in the receiving groove. At the same time, a hydraulic unit for driving the nozzle to swing is provided on one side of the nozzle. The hydraulic unit drives the nozzle to swing through the flowing liquid, that is, the hydraulic unit does not generate heat when driving the nozzle to swing, ensuring that the photovoltaic module can dissipate heat normally. When cleaning the surface of the photovoltaic module, the nozzle and the hydraulic unit are only started when there is continuous rainfall outside, so that the rainwater can first wet and flush away the dust on the surface of the photovoltaic module, and then the nozzle sprays the cleaning liquid, which removes the stubborn dust attached to the surface of the photovoltaic module. Solid stains are softened and washed away by rainwater, which reduces the amount of cleaning fluid used. At the same time, the nozzle is in a reciprocating swinging state when spraying cleaning, ensuring that the sprayed cleaning fluid can fully cover the surface of the photovoltaic module under the premise of setting a smaller number of nozzles, thereby reducing the number of nozzles set, and ultimately reducing the cost of a single photovoltaic curtain wall. In summary, it ensures that the overall size of the photovoltaic curtain wall will not be too large, and at the same time ensures the normal heat dissipation of the photovoltaic curtain wall. The nozzle is used to swing and spray the cleaning fluid during rainfall, which not only completes the cleaning of the photovoltaic module, but also reduces the amount of cleaning fluid used and improves the strength of the bracket profile.

[0015] 2. By setting a reversing valve and a gravity block, when the nozzle and the hydraulic unit are activated, the first water pump injects water into the swing shell through the reversing valve, causing the swing blades in the swing shell to rotate, and the swing blades drive the extension tube to rotate through the rotating ring, thereby causing the nozzle fixedly connected to the extension tube to swing. When the first water pump injects a certain amount of water into the swing shell, the first water pump stops running, and the reversing valve is reversed at the same time. The gravity block drives the extension tube to rotate in the opposite direction through its own gravity, causing the nozzle to rotate and reset, thereby realizing the swing of the nozzle.

[0016] 3. By fixing an arc rod on the gravity block, and sleeved on the periphery of the arc rod an arc shell which is coaxial with the extension tube and has an overflow groove at the end, hydraulic oil is provided in both the arc shell and the overflow groove. When the arc rod slides in the arc shell, the overflow groove slows down the rotation of the nozzle, so that the cleaning liquid sprayed by the nozzle will not be thrown a long distance, ensuring that the surface of the photovoltaic module near the nozzle position can also be sprayed with the cleaning liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a three-dimensional diagram of the installation of an automatic cleaning energy-saving building photovoltaic curtain wall in the present invention. Figure 1 .

[0018] Figure 2 The invention is an automatic cleaning energy-saving building photovoltaic curtain wall Figure 1 A local enlarged schematic diagram of point A in the middle.

[0019] Figure 3 This is a three-dimensional diagram of the installation of an automatic cleaning energy-saving building photovoltaic curtain wall in the present invention. Figure 2 .

[0020] Figure 4 This is a three-dimensional schematic diagram of an automatic cleaning energy-saving building photovoltaic curtain wall of the present invention. Figure 1 .

[0021] Figure 5 It is a three-dimensional schematic diagram of an automatic cleaning energy-saving building photovoltaic curtain wall of the present invention with the bracket removed.

[0022] Figure 6 The present invention is a cross-sectional schematic diagram of an energy-saving building photovoltaic curtain wall with its supports removed.

[0023] Figure 7 The invention is an automatic cleaning energy-saving building photovoltaic curtain wall Figure 6 A partial enlarged schematic diagram of point B in the middle.

[0024] Figure 8 The invention is an automatic cleaning energy-saving building photovoltaic curtain wall Figure 6 A partial enlarged schematic diagram of point C in the middle.

[0025] Figure 9 It is a three-dimensional schematic diagram of a deceleration unit of an automatic cleaning energy-saving building photovoltaic curtain wall according to the present invention.

[0026] Figure 10 The invention discloses a schematic cutaway perspective diagram of a deceleration unit of an energy-saving photovoltaic curtain wall for an automatic cleaning building.

[0027] Figure 11 This is a three-dimensional schematic diagram of an automatic cleaning energy-saving building photovoltaic curtain wall of the present invention. Figure 2 .

[0028] The numbers in the figure are: 1. Photovoltaic module; 2. Bracket; 21. Receiving tank; 3. Nozzle; 4. Hydraulic unit; 41. Swinging shell; 411. Inflow end; 412. Outflow end; 413. Limit block; 42. Swinging blade; 43. First water pump; 431. Reversing valve; 44. Rotating ring; 45. Extension pipe; 451. Extension rod; 452. Gravity block; 46. Water supply pipe; 461. Second water pump; 47. Speed ​​reduction unit; 471. Arc shell; 472. Arc rod; 473. Overflow tank; 474. Liquid storage chamber; 4741. Connecting port; 475. Sphere; 478. Telescopic chamber. DETAILED DESCRIPTION

[0029] In order to further understand the features, technical means, specific objectives and functions achieved by the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] Reference Figure 1 and Figure 3 - Figure 6 : An automatic cleaning energy-saving building photovoltaic curtain wall, comprising a photovoltaic module 1, a bracket 2 mounted on the periphery of the photovoltaic module 1, and a rain detection sensor; a receiving groove 21 is horizontally opened on the upper part of the bracket 2, and a plurality of reciprocatingly swinging nozzles 3 are evenly arranged in the receiving groove 21 along the horizontal direction of the receiving groove 21, and the nozzles 3 are used to spray cleaning liquid on the photovoltaic module 1, and a hydraulic unit 4 for driving the nozzle 3 to swing is provided on the bracket 2. A controller for activating the hydraulic unit (4) is provided on one side of the rain detection sensor. When the rain detection sensor detects rain, the controller controls the driving of the hydraulic unit (4) and the swinging of the nozzle (3).

[0031] Many existing buildings have photovoltaic curtain walls installed on their exterior walls. These walls are not only energy-efficient and environmentally friendly, but also reduce the heat island effect. However, due to the height of most buildings today, these walls need to be cleaned after a period of use. Otherwise, dust adhering to the photovoltaic modules 1 will seriously affect the electrical conversion efficiency of the modules 1. Due to the height of the buildings, the frequency of cleaning of photovoltaic curtain walls is usually low, only once or twice a year. The existing cleaning method is manual, which is costly per cleaning and requires cleaning personnel to be stationed outside the building, posing a significant safety risk when cleaning photovoltaic curtain walls. In order to avoid the above risks and the high cost of manual cleaning, some existing patents have proposed a method of installing a cleaning device on the periphery of the photovoltaic module 1. However, the cleaning device is provided with multiple motors. It is extremely expensive to install a cleaning device on each photovoltaic module 1, and manual maintenance is required for the motor in each cleaning device on a regular basis. The maintenance frequency is higher than the frequency when manual cleaning of the curtain wall is used, and the cost of use is also high. At the same time, the cleaning equipment is large in size and heavy in weight, which not only affects the number of photovoltaic curtain walls to be installed, but also has high requirements on the strength of the building walls. At the same time, the heat generated by the cleaning equipment during operation will flow in the gap between the photovoltaic curtain wall and the outer wall of the building, thereby affecting the normal heat dissipation of the photovoltaic curtain wall during daily use, and has no practical value.

[0032] In order to avoid the above situation, the specific structure of the existing energy-saving building photovoltaic curtain wall is redesigned so that the photovoltaic curtain wall can self-clean its own photovoltaic modules 1. At the same time, the size of the non-photovoltaic module 1 part of a single photovoltaic curtain wall will not be too large, thereby ensuring the number of photovoltaic curtain walls to be installed. At the same time, in addition to the photovoltaic modules 1 being electronic components, no other electronic components are in operation in the photovoltaic curtain wall, thereby ensuring that the photovoltaic modules 1 can dissipate heat normally during operation. The specific structure and working process of the photovoltaic curtain wall of the present invention are as follows: A bracket 2 that can be fixedly mounted on a building wall is provided around the periphery of the photovoltaic module 1. A gap exists between the photovoltaic module 1 and the building wall, and the heat generated by the photovoltaic module 1 during operation is dissipated through the gap. After the photovoltaic module 1 has been used for a period of time, the dust attached to the photovoltaic module 1 needs to be cleaned. It is worth noting that the nozzle 3 is only in operation when there is continuous rainfall. This is because if the nozzle 3 starts to spray cleaning liquid at the beginning of the rain, it is easy to waste too much cleaning liquid. This is because when the rain starts, the rain has not yet wetted the dust attached to the surface of the photovoltaic module 1. The dust on the outermost layer can be directly washed away by the rain, without the need for cleaning liquid. After the rain continues for a period of time, the rain will basically wash away the dust attached to the surface of the photovoltaic module 1. Only some stubborn dust remains attached to the surface of the photovoltaic module 1. At this time, the cleaning liquid sprayed by the nozzle 3 rinses the surface of the photovoltaic module 1, which not only ensures the cleanliness of the surface of the photovoltaic module 1 but also reduces the loss of cleaning liquid. At the same time, when the nozzle 3 sprays the cleaning liquid, the hydraulic unit 4 drives the nozzle 3 to swing, so that the cleaning liquid sprayed by the nozzle 3 can cover a larger area, thereby reducing the number of nozzles 3 arranged in the receiving tank 21 and reducing costs.

[0033] By opening a receiving groove 21 on the upper part of the bracket 2, and arranging a plurality of reciprocatingly swinging nozzles 3 in the receiving groove 21, and at the same time, a hydraulic unit 4 for driving the nozzle 3 to swing is arranged on one side of the nozzle 3, and the hydraulic unit 4 drives the nozzle 3 to swing through the flowing liquid, that is, the hydraulic unit 4 does not generate heat when driving the nozzle 3 to swing, ensuring that the photovoltaic module 1 can dissipate heat normally. When cleaning the surface of the photovoltaic module 1, the nozzle 3 and the hydraulic unit 4 are only started when the outside world is in continuous rainfall, so that the rainwater can first wet and flush away the dust on the surface of the photovoltaic module 1, and then the nozzle 3 sprays out the cleaning liquid, and the cleaning liquid will adhere to Stubborn stains on the surface of the photovoltaic module 1 are softened and washed away by rainwater, reducing the amount of cleaning liquid used. At the same time, the nozzle 3 is in a reciprocating swinging state when spraying cleaning, ensuring that under the premise of setting a smaller number of nozzles 3, the sprayed cleaning liquid can fully cover the surface of the photovoltaic module 1, thereby reducing the number of nozzles 3 set, and ultimately reducing the cost of a single photovoltaic curtain wall. In summary, it ensures that the overall size of the photovoltaic curtain wall will not be too large, and at the same time ensures the normal heat dissipation of the photovoltaic curtain wall. By making the nozzle 3 swing and spray the cleaning liquid during rainfall, the cleaning of the photovoltaic module 1 is completed, and the amount of cleaning liquid used is reduced.

[0034] When the rain detection sensor just detects rain, the controller will not immediately activate the hydraulic unit 4. According to the rainfall level divided by meteorological standards, rainfall less than 2.5 mm per hour is light rain; rainfall between 2.5 mm and 7.9 mm per hour is moderate rain; and rainfall greater than 8 mm per hour is heavy rain. In order to improve the cleaning efficiency of the cleaning fluid, the greater the external rainfall, the better the flushing effect on the photovoltaic module 1. If the external rainfall just starts, the hydraulic unit 4 is activated. At this time, the dust on the surface of the photovoltaic module 1 has not yet been wetted by the rain, and the cleaning effect of the sprayed cleaning fluid is poor. The rain detection sensor is preset with a maximum precipitation threshold. When the precipitation of external rain reaches the maximum threshold, the controller activates the hydraulic unit 4. In areas with abundant rainfall, the maximum precipitation threshold can be set to 8 mm, and in areas with less rainfall, the maximum precipitation threshold can be flexibly set according to actual conditions. When it rains continuously and the rainfall is large, the rainwater falling on the photovoltaic module 1 can not only moisten the dust on the photovoltaic module 1 in advance, but also wash away the cleaning liquid sprayed by the nozzle 3 in time, which not only reduces the water resource usage in traditional cleaning of the photovoltaic module 1, but also ensures that the photovoltaic module 1 can be cleaned smoothly.

[0035] Reference Figure 2 、 Figure 7 and Figure 8 : The hydraulic unit 4 includes a swinging shell 41 arranged on the bracket 2, the interior of the swinging shell 41 is a fan-shaped structure cavity, and a swinging blade 42 is arranged in the fan-shaped structure cavity to rotate around the fan-shaped structure cavity. The hydraulic unit 4 also includes a first water pump 43 that injects or discharges a certain amount of liquid from one end of the swinging shell 41.

[0036] Two ports for supplying water to flow through the swing housing 41 are provided on the swing housing 41 . Water flows into the swing housing 41 from one of the ports and flows out from the other port. The flowing water drives the swing blades 42 to rotate.

[0037] Reference Figure 5 - Figure 8 : A rotating ring 44 is provided on the swing shell 41 to rotate along the axis of the fan-shaped structure cavity, and the swing blade 42 is fixedly provided on the rotating ring 44. An extension tube 45 is horizontally provided on the nozzle 3 and passes through the inner ring of the rotating ring 44. The extension tube 45 is connected to the nozzle 3 and is fixedly connected to the rotating ring 44. A water supply pipe 46 for supplying cleaning liquid to the extension tube 45 is provided at the end of the extension tube 45 away from the nozzle 3, and the extension tube 45 and the water supply pipe 46 are rotatably matched.

[0038] A second water pump 461 is connected to the input end of the water supply pipe 46. Since the nozzle 3 will swing back and forth when spraying cleaning liquid, an extension pipe 45 is provided on one side of the nozzle 3 to be interconnected with the nozzle 3, so that the extension pipe 45 is fixedly connected to the rotating ring 44 and the extension pipe 45 is rotated and coordinated with the water supply pipe 46, thereby avoiding the situation where the extension pipe 45 and the water supply pipe 46 swing together with the nozzle 3 when the nozzle 3 swings.

[0039] Reference Figure 9 : An extension rod 451 is fixedly provided on the side wall of the extension tube 45 along the radial direction of the extension tube 45, and a gravity block 452 is fixedly provided at the end of the extension rod 451. After the rotating ring 44 rotates under the action of the second water pump 461, the gravity block 452 provides a reset rotation force to the extension tube 45 through the extension rod 451.

[0040] Reference Figure 2 : A two-position three-way reversing valve 431 is provided between the first water pump 43 and the swing shell 41. After the first water pump 43 injects liquid into the swing shell 41 through the reversing valve 431, the reversing valve 431 changes position, and the liquid in the swing shell 41 can be freely discharged through the reversing valve 431.

[0041] When the nozzle 3 and the hydraulic unit 4 are activated, the first water pump 43 injects water into the swing shell 41 through the reversing valve 431, causing the swing blade 42 in the swing shell 41 to rotate, and the swing blade 42 drives the extension tube 45 to rotate through the rotating ring 44, thereby causing the nozzle 3 fixedly connected to the extension tube 45 to swing. When the first water pump 43 injects a certain amount of water into the swing shell 41, the first water pump 43 stops running, and at the same time the reversing valve 431 is reversed, and the gravity block 452 drives the extension tube 45 to rotate in the opposite direction by its own gravity, causing the nozzle 3 to rotate and reset, thereby realizing the swing of the nozzle 3.

[0042] Reference Figure 8 、 Figure 9 and Figure 10 : An inflow end 411 and an outflow end 412 are provided on the swing shell 41, and a limit block 413 is fixedly provided on the bracket 2 to limit the inclination angle of the nozzle 3 when the first water pump 43 is not started. When the nozzle 3 is limited by the limit block 413, the swing blade 42 is located at the upper part of the inflow end 411, and the inflow end 411 and the outflow end 412 are in a non-connected state.

[0043] After the first water pump 43 is started, the swing blade 42 is pushed by the water flow to rotate in the swing shell 41, and the inflow end 411 is connected to the outflow end 412. After the first water pump 43 stops running, the reversing valve 431 is reversed, and the gravity block 452 drives the extension tube 45 to rotate in the opposite direction through the extension rod 451, thereby causing the swing blade 42 to rotate from the outflow end 412 to the inflow end 411. After the nozzle 3 contacts the limit block 413, the swing blade 42 resets and stops rotating, and the nozzle 3 is in a tilted state.

[0044] Reference Figure 8 - Figure 11 : A deceleration unit 47 that can reduce the swing speed of the nozzle 3 is provided on one side of the nozzle 3. The deceleration unit 47 includes an arc-shaped shell 471 arranged on the bracket 2 around the axis of the extension tube 45, and an arc-shaped rod 472 fixedly connected to the gravity block 452 is slidingly provided in the arc-shaped shell 471. An overflow groove 473 connected to the arc-shaped shell 471 is provided on one side of the end of the arc-shaped shell 471.

[0045] When the first water pump 43 injects water into the swing shell 41, the water flow is in a high-pressure state, the flow rate of the water flow is high, and the swing speed of the nozzle 3 is fast, resulting in the cleaning liquid being unable to contact the surface of the photovoltaic component 1 near the nozzle 3. After the first water pump 43 completes the water injection, the reversing valve 431 is reversed, and under the action of the gravity block 452, the nozzle 3 will be quickly driven to reset, and the swing speed is still fast, which still causes the cleaning liquid to be unable to contact the surface of the photovoltaic component 1 near the nozzle 3, thereby resulting in the generation of a blind spot. An arc rod 472 is fixedly set on the gravity block 452, and an arc shell 471 is sleeved on the periphery of the arc rod 472, which is coaxial with the extension tube 45 and has an overflow groove 473 at the end. Hydraulic oil is provided in the arc shell 471 and the overflow groove 473. When the arc rod 472 slides in the arc shell 471, the overflow groove 473 slows down the rotation of the nozzle 3, so that the cleaning liquid sprayed by the nozzle 3 will not be thrown a long distance, ensuring that the surface of the photovoltaic module 1 near the nozzle 3 can also be sprayed with the cleaning liquid.

[0046] Reference Figure 10 : A liquid storage chamber 474 is provided at the end of the arc-shaped shell 471, and a communication port 4741 is provided at the upper end of the liquid storage chamber 474. The liquid storage chamber 474 is connected to the arc-shaped shell 471 through the communication port 4741, and a sphere 475 is provided on the flow port.

[0047] When the first water pump 43 is started, the nozzle 3 rotates, and the gravity block 452 drives the arc rod 472 to slide out of the arc shell 471. In order to prevent the overflow groove 473 from decelerating the nozzle 3 when the first water pump 43 is running, a liquid storage chamber 474, a connecting port 4741 and a sphere 475 are provided. When the arc rod 472 slides out of the arc shell 471, a negative pressure is formed in the arc shell 471, and the hydraulic oil in the liquid storage chamber 474 can flow into the arc shell 471 through the connecting port 4741 as well as through the overflow groove 473. 71, the overflow effect of the overflow groove 473 is weakened, thereby reducing the load of the first water pump 43 during operation. When the first water pump 43 completes operation, the gravity block 452 drives the arc rod 472 to slide into the arc shell 471, and the sphere 475 blocks the connecting port 4741. The hydraulic oil in the arc shell 471 can only flow from the overflow groove 473 into the liquid storage chamber 474, thereby achieving a deceleration effect, which not only reduces the load of the first water pump 43, but also avoids the blind spot when the nozzle 3 sprays the cleaning liquid.

[0048] Reference Figure 10 : A telescopic chamber 478 is provided at the bottom of the liquid storage chamber 474.

[0049] When the nozzle 3 is reset, the arc rod 472 slides into the arc shell 471, the sphere 475 blocks the connecting port 4741, the overflow groove 473 decelerates the nozzle 3 during the reset process, and the hydraulic oil in the arc shell 471 flows into the liquid storage chamber 474 through the overflow groove 473. The telescopic chamber 478 stretches after the hydraulic oil flows into the liquid storage chamber 474.

[0050] Working Principle: After the photovoltaic module 1 has been used for a period of time, it is necessary to clean the dust attached to the photovoltaic module 1. It is worth noting that the nozzle 3 is only in operation when there is continuous rainfall. This is because if the nozzle 3 starts to spray cleaning liquid at the beginning of the rain, it is easy to waste too much cleaning liquid. This is because when the rain starts, the rain has not yet wetted the dust attached to the surface of the photovoltaic module 1. The dust on the outermost layer can be directly washed away by the rain, without the need for cleaning liquid. After the rain continues for a period of time, the rain will basically wash away the dust attached to the surface of the photovoltaic module 1. Only some stubborn dust remains attached to the surface of the photovoltaic module 1. At this time, the cleaning liquid sprayed by the nozzle 3 rinses the surface of the photovoltaic module 1, ensuring the cleaning of the photovoltaic module 1 and reducing the loss of cleaning liquid. At the same time, when the nozzle 3 sprays the cleaning liquid, the hydraulic unit 4 drives the nozzle 3 to swing, so that the cleaning liquid sprayed by the nozzle 3 can cover a larger area, thereby reducing the number of nozzles 3 arranged in the receiving tank 21 and reducing costs.

[0051] The above embodiments merely represent one or more embodiments of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of protection of the present invention. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present invention, and such modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the appended claims.

Claims

1. An automatic cleaning energy-saving building photovoltaic curtain wall, comprising a photovoltaic module (1), a bracket (2) arranged on the periphery of the photovoltaic module (1), and a rain detection sensor; It is characterized by: A receiving groove (21) is horizontally provided on the upper portion of the bracket (2), and a plurality of reciprocatingly swingable nozzles (3) are evenly arranged in the receiving groove (21) along the horizontal direction of the receiving groove (21). The nozzles (3) are used to spray cleaning liquid on the photovoltaic module (1). A hydraulic unit (4) for driving the nozzles (3) to swing is provided on the bracket (2), and a controller for activating the hydraulic unit (4) is provided on one side of the rain detection sensor. When the rain detection sensor detects rain, the controller controls the hydraulic unit (4) to drive the nozzles (3) to swing.

2. The automatic cleaning energy-saving building photovoltaic curtain wall according to claim 1, characterized in that: The hydraulic unit (4) comprises a swinging shell (41) arranged on a bracket (2); the interior of the swinging shell (41) is a fan-shaped structural cavity; a swinging blade (42) is arranged in the fan-shaped structural cavity and rotates around the fan-shaped structural cavity; the hydraulic unit (4) further comprises a first water pump (43) for injecting or discharging a fixed amount of liquid from one end of the swinging shell (41).

3. The automatic cleaning energy-saving building photovoltaic curtain wall according to claim 2, characterized in that: A rotating ring (44) is provided on the swing shell (41) so as to rotate along the axis of the sector-shaped structure cavity. The swing blade (42) is fixedly provided on the rotating ring (44). An extension pipe (45) is horizontally provided on the nozzle (3) and passes through the inner ring of the rotating ring (44). The extension pipe (45) is communicated with the nozzle (3). The extension pipe (45) is fixedly connected to the rotating ring (44). A water supply pipe (46) for supplying cleaning liquid to the extension pipe (45) is provided at one end of the extension pipe (45) away from the nozzle (3). The extension pipe (45) and the water supply pipe (46) are rotatably matched.

4. The automatic cleaning energy-saving building photovoltaic curtain wall according to claim 3, characterized in that: An extension rod (451) is fixedly provided on the side wall of the extension tube (45) along the radial direction of the extension tube (45), and a gravity block (452) is fixedly provided at the end of the extension rod (451). After the rotating ring (44) rotates under the action of the second water pump (461), the gravity block (452) provides a restoring rotation force to the extension tube (455) through the extension rod (451).

5. The automatic cleaning energy-saving building photovoltaic curtain wall according to claim 2, characterized in that: A two-position three-way reversing valve (431) is provided between the first water pump (43) and the swing housing (41). After the first water pump (43) injects liquid into the swing housing (41) through the reversing valve (431), the reversing valve (431) switches positions, and the liquid in the swing housing (41) can be freely discharged through the reversing valve (431).

6. The automatic cleaning energy-saving building photovoltaic curtain wall according to claim 2, characterized in that: An inflow end (411) and an outflow end (412) are provided on the swing housing (41), and a limit block (413) is fixedly provided on the bracket (2) for limiting the tilt angle of the nozzle (3) when the first water pump (43) is not started. When the nozzle (3) is limited by the limit block (413), the swing blade (42) is located above the inflow end (411), and the inflow end (411) and the outflow end (412) are in a non-connected state.

7. The automatic cleaning energy-saving building photovoltaic curtain wall according to claim 4, characterized in that: A deceleration unit (47) capable of reducing the swing speed of the nozzle (3) is provided on one side of the nozzle (3). The deceleration unit (47) includes an arc-shaped shell (471) arranged on the bracket (2) around the axis of the extension tube (45), an arc-shaped rod (472) fixedly connected to the gravity block (452) is slidably provided in the arc-shaped shell (471), and an overflow groove (473) connected to the arc-shaped shell (471) is provided on one side of the end of the arc-shaped shell (471).

8. The automatic cleaning energy-saving building photovoltaic curtain wall according to claim 7, characterized in that: A liquid storage cavity (474) is provided at the end of the arc-shaped shell (471), and a communication port (4741) is provided at the upper end of the liquid storage cavity (474). The liquid storage cavity (474) is communicated with the arc-shaped shell (471) via the communication port (4741), and a sphere (475) is provided on the flow port.

9. The automatic cleaning energy-saving building photovoltaic curtain wall according to claim 8, characterized in that: A telescopic cavity (478) is provided at the bottom of the liquid storage cavity (474).

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