CN114866021A - Water cooling structure for heat dissipation of photovoltaic junction box - Google Patents
Water cooling structure for heat dissipation of photovoltaic junction box Download PDFInfo
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- CN114866021A CN114866021A CN202210502128.2A CN202210502128A CN114866021A CN 114866021 A CN114866021 A CN 114866021A CN 202210502128 A CN202210502128 A CN 202210502128A CN 114866021 A CN114866021 A CN 114866021A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
- H02S40/30—Electrical components
- H02S40/34—Electrical components comprising specially adapted electrical connection means to be structurally associated with the PV module, e.g. junction boxes
- H02S40/345—Electrical components comprising specially adapted electrical connection means to be structurally associated with the PV module, e.g. junction boxes with cooling means associated with the electrical connection means, e.g. cooling means associated with or applied to the junction box
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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Abstract
本发明公开了一种用于对光伏接线盒散热的水冷结构，涉及光伏发电设备技术领域。本发明安装于可跟随太阳转动的光伏板支架上，用于对光伏接线盒进行冷却，包括注水结构、牵引结构和水管，所述光伏板支架的可转动部分与牵引结构连接，并通过光伏板支架的转动来牵引注水结构进行注水动作，所述光伏接线盒上设置有冷区管路，所述注水结构上设置有出水口，所述出水口通过水管与冷区管路连通。本发明对光伏接线盒上冷却管路的加工精度还是对冷却液的质量要求都很低，安装和维护难度小，成本低廉易于推广。
The invention discloses a water cooling structure for dissipating heat to a photovoltaic junction box, and relates to the technical field of photovoltaic power generation equipment. The present invention is installed on a photovoltaic panel support that can rotate following the sun, and is used for cooling the photovoltaic junction box, including a water injection structure, a traction structure and a water pipe. The rotation of the bracket pulls the water injection structure to perform water injection. The photovoltaic junction box is provided with a cold zone pipeline, and the water injection structure is provided with a water outlet, which is communicated with the cold zone pipeline through a water pipe. The invention has low requirements on the machining accuracy of the cooling pipeline on the photovoltaic junction box and on the quality of the cooling liquid, is less difficult to install and maintain, and has low cost and is easy to popularize.
Description
Technical Field
The invention belongs to the technical field of photovoltaic power generation equipment, and particularly relates to a water cooling structure for dissipating heat of a photovoltaic junction box.
Background
The photovoltaic junction box is used for converting electric energy generated by photovoltaic reaction of the photovoltaic panel into a common circuit system, and comprises a diode and other conductive elements, wherein the diode can generate a large amount of heat during operation. When the temperature in the photovoltaic junction box is too high due to the heat generated by the diode, the photovoltaic junction box may be damaged, and the photovoltaic junction box cannot work normally.
Therefore, the cooling of the photovoltaic junction box is an important technical problem. In the invention patent with the application number of 201910533417.7, a heat dissipation structure for a diode is arranged in a photovoltaic junction box, the heat dissipation structure is covered outside the diode, a spiral cooling channel is further arranged in the heat dissipation structure, the cooling channel is used for introducing cooling liquid, and the cooling liquid is used for cooling the diode, so that the technical effect of enhancing the heat dissipation capacity of the photovoltaic junction box is achieved. However, the diode is small in size, so that the processing requirement of a heat dissipation structure in the technology is high, the quality requirement of the introduced cooling liquid is also high, and the maintenance difficulty and cost in the subsequent maintenance of the photovoltaic junction box are increased.
Disclosure of Invention
The invention aims to provide a water cooling structure for heat dissipation of a photovoltaic junction box, and aims to enable the photovoltaic junction box to dissipate heat through water cooling and reduce the processing precision and the maintenance difficulty of the photovoltaic junction box and the whole water cooling structure.
In order to solve the technical problems, the invention is realized by the following technical scheme:
the utility model provides a be used for following radiating water-cooling structure of sun for install on the pivoted photovoltaic board support of sun for cool off the photovoltaic terminal box, include the water injection structure, pull structure and water pipe, the rotatable part of photovoltaic board support is connected with the structure of pulling to the rotation through the photovoltaic board support pulls the water injection structure and carries out the water injection action, be provided with the cooling pipeline on the photovoltaic terminal box, the structural delivery port that is provided with of water injection, the delivery port leads to pipe and cooling pipeline intercommunication.
According to the photovoltaic panel capable of moving along with the sun, when the photovoltaic panel moves along with the sun, the water injection mechanism can be driven by the traction mechanism to inject water into the cooling pipeline on the photovoltaic junction box, and when water in the cooling pipeline flows, large heat on the photovoltaic junction box can be taken away. The water injection power of the photovoltaic power generation system is not required to be independently arranged, and only the photovoltaic panel is required to move. The length and the width of the photovoltaic panel are usually measured in meters, so that the rotation stroke of the edge of the photovoltaic panel is large, the rotation stroke of the photovoltaic panel is large, the traction distance of the traction mechanism which can be driven is long, namely the water injection flow of the water injection mechanism is large, and therefore under the condition that the water injection flow is large enough, the pipe diameter allowable range of the cooling pipeline is larger, and the pipe diameter is more selected. When the selectable range of the pipe diameter is larger, the precision requirement of the pipe diameter is obviously reduced. The precision requirement of the pipe diameter is reduced, and the requirement of the available cooling liquid is reduced, so that the invention can use water as the cooling liquid and achieve the purposes of heat dissipation and temperature reduction through water flow.
Preferably, the water injection structure is fixed in the water tank, the water injection structure is a piston structure, the water outlet is arranged on a piston cylinder of the piston structure, the piston cylinder is also provided with a water inlet, and the water inlet and the water outlet are both provided with one-way valves.
The water tank is arranged to provide water source for the water injection structure, so that the water injection structure can be ensured to work for a long time. Because the photovoltaic panel needs to be cleaned and maintained regularly, the maintenance period is different according to local environments, the maintenance period is usually between 1 day and 1 month, and even in areas with serious sand storm, the maintenance frequency is more than once per day. The existence of the water tank can ensure that the water injection structure has enough water to carry out cooling operation in a maintenance period, and the water in the water tank can be supplemented when the water tank is maintained and cleaned every time. Therefore, the cooling structure does not need to be additionally provided with structures such as a motor and the like to provide power for the water injection structure, and does not need to separately pull a water pipe to provide water source for the cooling structure in a maintenance period. Wherein water inlet and delivery port are located the same end on the piston cylinder, and the one end of principle piston rod promptly ensures that when the piston rod is removing, water inlet or delivery port can not be blockked up by piston rod itself and can't intake or go out water. The one-way valve of the water inlet only allows external water to enter the piston cylinder, and the one-way valve of the water outlet only allows water in the piston cylinder to be discharged outwards. In a similar way, the piston structure can be provided with only one water inlet and outlet, which is equivalent to an injector, only one tee joint needs to be fixed on the water inlet and outlet, one interface of the tee joint is connected with the water inlet and outlet, one interface of the other two interfaces is connected with a water outlet pipe with a one-way valve, and the other interface is connected with a water inlet pipe with a one-way valve; this embodiment also achieves the same technical effect.
Preferably, the traction structure is a traction rope, a piston rod and a piston cylinder of the piston structure are respectively provided with a first anchor point and a first guide ring, a rotatable part of the photovoltaic plate support is provided with a second anchor point, a fixed part of the photovoltaic plate support is provided with a second guide ring, one end of the traction rope is fixedly connected with the first anchor point, and the other end of the traction rope passes through the first guide ring and the second guide ring and is fixedly connected with the second anchor point.
Say that first anchor point and first guide ring set up respectively on piston rod and piston cylinder for the haulage rope can be along the axis guide piston rod of piston structure or piston cylinder removal, ensures that drive mechanism can be followed the correct direction and pushed the piston rod into in the piston cylinder. When the piston cylinder is fixedly connected with the water tank, the first anchor point is fixed on the piston rod, the first guide ring is fixed on the piston cylinder, and the traction mechanism pulls the piston rod to move; on the contrary, when the piston rod is fixedly connected with the water tank, the first anchor point is fixed on the piston cylinder, the first guide ring is fixed on the piston rod, and the traction mechanism pulls the piston cylinder to move towards the piston rod, so that the aim of realizing water injection by the opposite movement of the piston cylinder and the piston rod can be fulfilled. And traction force of the traction mechanism comes from the rotation of the photovoltaic panel support, and when the photovoltaic panel support rotates, the traction mechanism can be driven to move, so that a second anchor point is arranged on the rotatable part of the photovoltaic panel support and is used for fixedly connecting the other end of the traction mechanism. The whole structure of the photovoltaic panel bracket comprises a fixed part and a rotatable part, wherein the fixed part comprises a base and a support column and is used for being fixedly connected with the ground to support the whole photovoltaic panel bracket; the fixed part and the rotatable part are rotatably connected through a rotatable turntable, so that the rotatable part can rotate relative to the fixed part, the rotatable part comprises a fixed frame which is connected with the turntable and comprises the turntable and the rotatable part, the fixed frame is a rectangular frame which is formed by mutually fixing a plurality of profiles which are longitudinally arranged and transversely arranged, and the photovoltaic panel is fixed on the rectangular frame. The further the second anchor point is from the center of rotation of the turntable, the longer the towing distance. Therefore, the position of the second anchor point can be judged according to the stroke of the piston structure, and the length of the track of the second anchor point moving along with the sun every day is equal to the stroke of the piston structure.
Preferably, the piston structure is provided with a reset structure, and the reset structure is a reset spring. One arrangement mode of the return spring is a built-in spring, namely, in the piston rod and the piston cylinder, the return spring is positioned in the piston cylinder, one end of the return spring abuts against one inner end face of the piston cylinder, the other end of the return spring abuts against the end face of the piston rod, and when the piston structure is filled with water outwards, the return spring is compressed, so that when the photovoltaic panel support is reset every day, the traction force of the traction mechanism disappears, and at the moment, the compressed return spring pushes the piston rod to move outwards to an initial position; the other setting mode of the return spring is that the spring is external, namely in the piston rod and the piston cylinder, one part is fixedly connected with the water tank, the other part is connected with the water tank through the return spring, when the piston structure is filled with water outwards, the return spring can be stretched, when the photovoltaic panel support is reset every day, the traction force of the traction mechanism disappears, and at the moment, the stretched return spring can push the piston rod to move outwards to the initial position.
Since the photovoltaic panel support rotates along with the movement of the sun every day, the photovoltaic panel support has a resetting action every day, and therefore, the piston structure also needs a resetting structure to reset itself, so that the photovoltaic panel support can automatically and circularly work every day.
Preferably, the cooling pipeline is an S-shaped rotary channel, the S-shaped rotary channel is located on one side surface attached to a heating element in the photovoltaic junction box, the cooling pipeline has two pipe orifices, one pipe orifice is connected with the water outlet of the piston structure through a water pipe, and the other pipe orifice is connected with the water tank through another water pipe.
Set up the cooling pipeline into the gyration pipeline of S type, need with the pipe diameter complex of cooling pipeline, because piston structure' S water injection volume is fixed, it makes the rivers circulation to set up a flat through passageway on the photovoltaic terminal box casing so, also can reach the purpose of cooling the photovoltaic terminal box through the water of pouring into the flow, but rivers are big at the flow pipeline sectional area on the photovoltaic terminal box like this, rivers flow slowly, the slow rivers radiating effect of velocity of flow is not as good as the fast rivers effect of velocity of flow, the photovoltaic terminal box also can not increase too much thickness because of the reason that sets up the cooling pipeline simultaneously. The cooling circuit is thus configured as an S-shaped return circuit, so that the length of the circuit increases and the cross-sectional area of the circuit decreases over the same area. Under the unchangeable condition of the water injection volume of water injection structure, the velocity of flow that can accelerate rivers is reduced to the sectional area of pipeline, reaches better radiating effect. The S-shaped rotary pipeline is arranged, the sectional area of the S-shaped rotary pipeline can be square or rectangular, and the side length of the square or the rectangle can reach 2-4 mm. The pipeline of this kind of size machining precision is low, very easy processing and low to the requirement of water source, only need filter obvious particulate matter in the water source can. And the water outlet of the S-shaped rotary pipeline is connected with the water tank, so that water can be recycled, and the water consumption is greatly reduced. That is, one moisturizing can maintain the entire cooling structure operating for a long time, sufficient to the end of the cleaning cycle of each photovoltaic panel.
Preferably, the traction rope is further sleeved with a rope sleeve, the rope sleeve is of a tubular structure which cannot be pulled up, the traction rope is slidably connected with an inner hole of the rope sleeve, one end of the rope sleeve is fixedly connected with the water tank, and the other end of the rope sleeve is fixedly connected with the fixing part of the photovoltaic panel support.
After the rope sleeve is arranged, the traction effect of the traction rope cannot be influenced by the distance between the water tank and the photovoltaic panel support. If there is not the fag end, then when the water tank is close to the photovoltaic board support, then the haulage rope can become lax to influence piston structure's stroke, the water injection volume also can reduce after the stroke of water injection structure reduces. After the rope sleeve is added, no matter how far the water tank is away from the photovoltaic panel support, the traction rope can be in a tight state, the principle of the traction rope is similar to that of a brake cable of a bicycle, and the part of the brake cable of the bicycle from a brake handle to a brake structure is also provided with the rope sleeve structure, so that the brake cable between the brake handle and the brake structure of the bicycle is not a tight straight line, and when the brake handle is held tightly, the brake structure can still make a braking action at once. The presence of the rope socket limits the travel distance of the pull rope so that the pulling capacity of the pull rope is not affected by the positional displacement of the water tank.
Preferably, a buffer structure is arranged on a section of the traction rope between the rope sleeve and the rotatable part of the photovoltaic panel bracket, and the buffer structure can be a buffer spring. Since the length of the trajectory that the second anchor point runs each day is not easily estimated accurately. Consequently, set up buffer spring, can reduce the installation accuracy by a wide margin, can make the staff install according to big distance when the installation, can wrap the stroke of evidence piston structure at every turn and can all walk like this, also can be at haulage rope tension can not too big, and when the pulling force that the haulage rope received obviously increased, buffer spring will be elongated to guaranteed that the haulage rope should not be impaired for the pulling force is too big.
Preferably, the photovoltaic board support is used for installing the photovoltaic board, the opening of water tank is up, the water tank is located the downside on photovoltaic board lower limb. The water tank with the upward opening can be convenient for adding water, and can also receive rainwater or water for cleaning the photovoltaic panel to serve as cooling water in the water tank. When rain water or washing of the photovoltaic panel falls on the photovoltaic panel, the water flows down along the photovoltaic panel and falls from the lower edge of the photovoltaic panel, thereby falling in the water tank.
Preferably, a filtering structure is arranged on the opening of the water tank for filtering water. The filtration of water tank includes bearing frame, filter cloth and filter screen, and the bearing frame is used for providing the holding power for filter cloth and filter screen, have obvious hole of permeating water on the bearing frame for the water after being filtered by filter screen and filter cloth passes through. Therefore, the bearing frame can be in a basket shape or a metal frame shape with an upward opening. The filter cloth is laid to bearing frame top, and the filter screen is laid to the filter cloth top, and the filter screen is used for filtering large granule impurity, and the filter cloth is then used for filtering small granule impurity. The filter screen adopts the metal mesh, presses the filter cloth on the bearing frame, and the filter screen also is the one deck protection to the filter cloth simultaneously, prevents that the filter cloth from being damaged. In order to achieve the filtering effect, a gravel layer can be laid on the filter screen, so that the filtering effect can be better achieved. And the grit layer can also reduce the evaporation of water in the water tank, ensures that enough water in the water tank can be recycled.
The bearing frame can be connected with the water tank through a hinge and can also be directly located on an opening of the water tank. When not laying the gravel layer on the filter screen, the bearing frame passes through hinged joint with the water tank, carries out abluent cycle to the photovoltaic board at every turn and arrives, and the staff can directly open the bearing frame and look over in the water tank, and the staff can manually promote piston structure this moment and detect the water injection structure, if observe with the photovoltaic terminal box on the water pipe that the delivery port is connected have when going out water, then explain that whole water-cooling structure is normal operating. When the bearing frame is turned over, impurities on the bearing frame and impurities on the filter cloth are dumped out, and the impurities on the filter cloth and the filter cloth are cleaned. Therefore, the edges of the filter screen and the filter cloth are fixedly connected with the bearing frame, and the filter screen and the filter cloth cannot be loosened when the bearing frame rotates around the hinge. When a gravel layer needs to be added on the filter screen and the filter cloth, the bearing frame needs to be directly located on the water tank, a worker needs to lift the bearing frame to move away when the water tank is checked, and large sundries on the gravel layer need to be manually picked up when the sundries on the gravel layer are cleaned.
The invention has the following beneficial effects:
according to the technical scheme, the requirements on the machining precision of the cooling pipeline on the photovoltaic junction box and the quality of the cooling liquid are low, so that the cooling structure is low in installation and maintenance difficulty and cost, and is easy to popularize and apply.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without inventive labor.
FIG. 1 is a front view of the present invention;
FIG. 2 is a right side view of the present invention;
FIG. 3 is a cross-sectional view of one embodiment of a water tank and fill structure of the present invention;
FIG. 4 is a cross-sectional view of another embodiment of the water tank and filling structure of the present invention;
FIG. 5 is a left side view of the photovoltaic junction box of the present invention;
FIG. 6 is a cross-sectional view taken at C-C of FIG. 5;
FIG. 7 is an enlarged view taken at A in FIG. 1;
FIG. 8 is an enlarged view of FIG. 1 at B;
FIG. 9 is a front view of a pitch structure of the present invention;
fig. 10 is a front view of fig. 9 in another state.
In the drawings, the components represented by the respective reference numerals are listed below:
1. the water injection structure comprises a water injection structure, 2, a water inlet, 3-a water outlet, 4-a water pipe, 5, a photovoltaic junction box, 6, a support column, 7, a rope sleeve, 8, a traction rope, 9, a rotary disc, 10, a rotatable part, 11, buffer springs 11, 12, a second anchor point, 13-a filtering structure, 14, a water tank, 15, a first anchor point, 16, a reset spring, 17, a first guide ring, 18, a gravel layer, 19, a cooling pipeline, 20, a second guide ring, 21, a main support, 22, a support piston cylinder, 23, a water inlet joint, 24, a spray head, 25 and a pitching frame.
Detailed Description
The technical solution of the present invention is clearly and completely described below with reference to the accompanying drawings by way of specific implementation manners of the embodiments of the present invention.
Referring to fig. 1 to 10, the present invention is a water cooling structure for dissipating heat of a photovoltaic junction box, which is installed on a photovoltaic panel support that can rotate along with the sun, and is used for cooling a photovoltaic junction box 5.
In fig. 1 and 2, the fixed part of the photovoltaic panel support refers to a base and a pillar 6, the base is fixedly connected with the ground, the bottom of the pillar 6 is connected with the base and is used for supporting the rest part of the photovoltaic panel support, a turntable 9 for rotary connection is arranged at the joint of the top of the pillar 6 and a rotatable part 10, and the turntable 9 enables the rotatable part 10 to rotate relative to the pillar 6. The turnable part 10 comprises a fixed frame connecting the turntables 9 and above, which fixed frame is usually a rectangular frame formed by a number of longitudinally and transversely arranged profiles fixed to each other, to which rectangular frame the photovoltaic panels are fixed. The photovoltaic junction box 5 is fixed on a fixed part of the photovoltaic panel bracket, the water tank 14 is placed on the lower side of the photovoltaic panel, and the lower edge of the photovoltaic panel is positioned right above the water tank 14.
A piston arrangement, i.e. a filling arrangement 1 for filling water, is fixed in the water tank 14. A return spring 16 is arranged between the piston rod of the piston structure and the inner wall of the water tank 14, and under the action of the return spring 16, the piston rod is in a state of extending out of the piston cylinder. And a water inlet 2 and a water outlet 3 are arranged on the piston cylinder, and the water inlet 2 and the water outlet 3 are both positioned on one side far away from the piston rod. Therefore, when the piston rod moves into the piston cylinder, i.e. the piston structure shortens, the water in the piston cylinder is squeezed by the piston rod and is discharged from the water outlet 3, and the process is the water filling process of the piston structure in the invention. Conversely, when the piston rod is moved outwards from the piston cylinder, i.e. when the piston structure is extended, a low pressure is created in the piston cylinder, so that water can be sucked in from the water inlet 2 to fill the piston cylinder. The reason why the water inlet 2 and the water outlet 3 are separated is that the water inlet 2 and the water outlet 3 are both provided with one-way valves, the one-way valve on the water inlet 2 only allows water to enter the piston cylinder from the outside of the piston cylinder, and the one-way valve on the water outlet 3 only allows water to be discharged from the inside of the piston cylinder to the outside of the piston cylinder.
The side wall of the water tank 14 is provided with a joint which is used for communicating the inside of the water tank 14 and the outside of the water tank 14, a water outlet 3 of the piston is connected with a joint interface inside the water tank 14 through a water pipe 4, the joint interface outside the water tank 14 is also connected with the water pipe 4, the other end of the water pipe 4 is connected to a cooling pipeline 19 of the photovoltaic junction box 5, water injected by the piston structure can be conveyed to the cooling pipeline 19 through the water pipe 4, when the water in the cooling pipeline 19 keeps a flowing state, a large amount of heat at the position of the cooling pipeline 19 can be taken away, and the purpose of cooling and radiating the photovoltaic junction box 5 is achieved.
After entering the cooling pipeline 19, the water may be directly discharged from the other end of the cooling pipeline 19, or a water pipe 4 may be connected to the water discharge end of the cooling pipeline 19, and the water is guided back to the water tank 14 through the water pipe 4, so that the water in the water tank 14 may be recycled.
The movement of the piston rod is driven by a traction rope 8, the power of the traction rope 8 comes from the rotation of the photovoltaic panel bracket, and the reason why the invention is applied to the photovoltaic panel bracket which can rotate along with the sun is also.
One end of the traction rope 8 is anchored on the piston rod, the other end of the traction rope 8 is anchored on the photovoltaic panel bracket, because the photovoltaic panel rotates periodically, the traction rope 8 also pulls the piston rod to move periodically, and when the photovoltaic panel returns to the initial position every day, the piston rod also returns to the initial position under the action of the return spring 16. In this way, the piston periodically injects water into the cooling pipeline 19 of the photovoltaic junction box 5 to cool the photovoltaic junction box 5. When the photovoltaic panel rotates along with the sun, the photovoltaic panel generates electricity, namely when the diodes in the photovoltaic junction box 5 generate heat, namely when the water injection structure 1 of the invention injects water, the photovoltaic junction box 5 needs heat dissipation and cooling.
The anchor point of the traction rope 8 on the piston rod is a first anchor point 15, and the anchor point on the photovoltaic plate support is a second anchor point 12. In order to correct the pulling direction of the pulling rope 8, a first guide ring 17 is provided on the piston cylinder, through which first guide ring 17 the pulling rope 8 passes, so that the pulling direction of the pulling rope 8 towards the piston rod is the direction between the first anchor point 15 and the first guide ring 17, which is substantially equal to the direction of the piston rod movement. Because the pull rope 8 transmits the rotation of the rotatable part 10 of the photovoltaic panel bracket to the piston rod in the water tank 14, in order to avoid the displacement of the water tank 14 under the action of the pull rope 8 and influence the normal work of the piston structure, a rope sleeve 7 is arranged between the water tank 14 and the fixed part of the photovoltaic panel bracket, the rope sleeve 7 is a tubular structure sleeved on the pull rope 8, one end of the rope sleeve 7 is fixedly connected with the support column 6 of the photovoltaic panel bracket, and the other end of the rope sleeve is fixedly connected with the side wall of the water tank 14. The traction rope 8 is movable in the rope socket 7 along the inner hole of the rope socket 7, and the principle of the traction rope is similar to that of a brake cable and a pipeline for coating the brake cable of a bicycle. When the second anchor point 12 is displaced, the pulling rope 8 will move along with it, but the length of the pulling rope 8 between the water tank 14 and the photovoltaic panel support's strut 6 must move along the inner bore of the socket 7, even if the socket 7 is in a curved state. Therefore, after the rope socket 7 is arranged, the traction effect of the traction rope 8 is not influenced by the position of the water tank 14. Can set up second guide ring 20 on the pillar 6 of photovoltaic board support, when the haulage rope 8 is worn out from the fag end 7, probably because the angle is too big between haulage rope 8 and the fag end 7, form cutting action to fag end 7 in the reciprocating motion of haulage rope 8, thereby cause the damage to fag end 7, consequently set up second guide ring 20 and can once guide the direction of haulage rope 8, with the direction guide of haulage rope 8 to with fag end 7 extreme point department axial direction, avoided the damage of haulage rope 8 to fag end 7. Similarly, the end point of the rope sling 7 on one side of the water tank 14 can penetrate into the water tank 14 and is directly fixed on the piston cylinder, and the fixing mode can also avoid the damage of the traction rope 8 to the rope sling 7.
In order to facilitate the installation of the traction rope 8, a buffer spring 11 is provided on the traction rope 8, and the buffer spring 11 can greatly increase the selectable range of the second anchor point 12 of the traction rope 8. Without the damping spring 11, the actual distance of the second anchor point 12 from the center of rotation is greater than the calculated distance, which may result in excessive tightening of the traction rope 8, even in disconnection of the traction rope 8 or in detachment of the two anchor points. After the cushion spring 11 is provided, the extra distance can be compensated by the extension of the cushion spring 11. Therefore, after the buffer spring 11 is arranged, the installation precision of the traction rope 8 part can be greatly reduced, and the traction rope 8 is convenient to install and maintain.
The first anchor point 15 and the second anchor point 12 can be holes formed in the piston rod and the photovoltaic panel support, and can also be fixed seats or fixed rings welded on the piston rod and the photovoltaic panel support, and only the traction rope 8 needs to be fixed.
In fig. 3 and 4, two different embodiments are shown. In the embodiment shown in fig. 3, the filter structure 13 on the tank 14 is connected to the tank 14 by sitting on an opening above the tank 14, and in fig. 3 the relationship between the filter structure 13 and the tank 14 is shown, thus lifting the filter structure 13 away from the tank 14. Gravel layer 18 has still been laid among the filtration 13, sets up gravel layer 18 and can pass through gravel layer 18 and filter the first time of outside impurity, and gravel layer 18 can reduce the evaporation of moisture in the water tank 14 simultaneously.
In the embodiment shown in fig. 4, the filtering structure 13 is connected to the water tank 14 by a hinge, so that the filtering structure 13 can be turned around the hinge point, and impurities filtered by the filtering structure 13 can be directly poured out by turning.
In the two embodiments shown in fig. 3 and 4, the water injection structure 1 is a syringe, and the syringe only has one nozzle for water inlet and outlet, so a three-way joint is installed on the nozzle of the syringe, the other two nozzles of the three-way joint are respectively used as a water inlet 2 and a water outlet 3, and a one-way valve in the corresponding direction is installed according to the difference between the water inlet 2 and the water outlet 3.
In both embodiments shown in fig. 3 and 4, the water tank 14 is open upwards and the filter structure 13 is arranged so that the water tank 14 can receive rainwater directly or water flowing down from the photovoltaic panel as a water source, the filter structure 13 being intended to filter out significant particulate impurities.
In fig. 5 and 6, the structure of the cooling pipeline 19 on the photovoltaic junction box 5 is shown, and the cooling pipeline 19 is an S-shaped rotary channel, so that the purpose of the design is to ensure the flow velocity of water in the cooling pipeline 19, and the heat dissipation and cooling effects are good when the flow velocity of water is high. The shaping of cooling pipeline 19 can process out the slot that corresponds on a rectangular plate, then will have the one side subsides of slot to the position that photovoltaic terminal box 5 corresponds and generate heat, then adopt glue bond can, as long as can avoid cooling pipeline 19 and photovoltaic terminal box 5 edge of being connected to be watertightness, just can ensure the recycling of water, even cooling pipeline 19 appears leaking with photovoltaic terminal box 5 edge of being connected, also can not influence the cooling effect.
In order to fit the tank 14 configuration shown in fig. 3 and 4, the cooling circuit 19 is therefore 2-4mm in diameter, which allows filtered water to be used without clogging. And the diameter of the water injection structure 1 adopts the size of about 10cm, so the water flow of the water injection structure 1 moving unit distance can completely flow out only by the distance of dozens of times of the flowing distance of the cooling pipeline 19, therefore, the water flow speed in the cooling pipeline 19 can still be ensured by the slow movement of the water injection structure 1 under the action of the hauling rope 8, the water flow speed in the cooling pipeline 19 can be ensured, and the heat dissipation effect of the cooling pipeline 19 can also be ensured. And the diameter of the water injection structure 1 may be set larger as necessary to secure the cooling effect of the cooling line 19 as necessary.
In a preferred embodiment, as shown in fig. 9 and 10, the rotatable portion 10 of the photovoltaic panel is used for mounting the photovoltaic panel, the rotatable portion 10 includes a main bracket 21 and a pitching frame 25, the bottoms of the main bracket 21 and the pitching frame 25 are rotatably connected, so that the pitching frame 25 can adjust the pitching angle around the connection point with the main bracket 21, a telescopic structure is arranged between the main bracket 21 and the pitching frame 25, and the photovoltaic panel is fixed on the pitching frame 25. When the photovoltaic panel needs to be cleaned, the pitching frame 25 is supported from the main support 21 through the telescopic structure, so that the photovoltaic panel fixed on the pitching frame 25 is inclined. At the moment, the photovoltaic panel is cleaned, and sand and dust on the photovoltaic panel are more easily driven by water flow formed on the photovoltaic panel, and can more easily fall along the water flow under the action of gravity, so that the residual quantity of the sand and dust on the photovoltaic panel is reduced.
The telescopic structure is a supporting piston cylinder 22, and a water inlet pipe is arranged on the side wall of a piston cylinder of the supporting piston cylinder 22. In a more common telescopic structure, compared with a worm gear structure, the supporting piston cylinder 22 has a quicker response, and the pitching frame 25 can be supported immediately when the cleaning is needed, so that the telescopic structure is more in line with the actual requirement. The supporting piston cylinder 22 needs to be driven through hydraulic power, and therefore when the supporting piston cylinder 22 is adopted, a cleaning trolley is needed to provide a water source, the cleaning trolley provides power to inject the water source into the supporting piston cylinder 22, and the supporting piston cylinder 22 extends to support the pitching frame 25, so that the inclination of the photovoltaic panel on the pitching frame 25 is increased. The water inlet pipe supporting the piston cylinder 22 only needs to be provided with a water inlet joint 23, and the water inlet joint 23 is used for connecting a water spraying gun of a cleaning vehicle.
The supporting piston cylinder 22 is provided with a water outlet pipe, the water outlet pipe of the supporting piston cylinder 22 is connected with a plurality of spray heads 24, and the spray heads 24 are located at the top of the photovoltaic panel. Therefore, when the cleaning vehicle conveys water into the supporting piston cylinder 22, the supporting piston cylinder 22 can be extended by water pressure, the pitching frame 25 can be supported by extending the supporting piston cylinder 22, the inclination angle of the pitching frame 25 is larger, and the water in the supporting piston cylinder 22 flows to the spray head 24 when the piston in the supporting piston cylinder 22 moves to the water outlet pipe of the supporting piston cylinder 22 and is sprayed out by the spray head 24 to clean the surface of the photovoltaic panel.
Preferably, the second anchor point 12 is located on the main support so that the pitching motion of the pitching frame 25 does not affect the normal operation of the traction ropes 8.
Therefore, water is injected into the supporting piston cylinders 22 through the cleaning vehicle, the supporting piston cylinders 22 extend to support the pitching frame 25, then the spray heads 24 spray water to clean the photovoltaic panel, the water sprayed from the spray heads 24 flows into the water tank 14 below along with sand and dust attached to the photovoltaic panel, the water is filtered by the filtering structure above the water tank 14, and the filtered water is used for cooling the photovoltaic junction box 5.
Claims (9)
1. The utility model provides a be used for to radiating water-cooling structure of photovoltaic terminal box installs on can following sun pivoted photovoltaic board support for cool off photovoltaic terminal box (5), its characterized in that: including water injection structure (1), pull structure and water pipe (4), rotatable part (10) of photovoltaic board support with pull the structural connection to pull water injection structure (1) through the rotation of photovoltaic board support and carry out the water injection action, be provided with cold district pipeline (19) on photovoltaic terminal box (5), be provided with delivery port (3) on water injection structure (1), delivery port (3) lead to pipe (4) and cold district pipeline (19) intercommunication.
2. The water-cooling structure for dissipating heat of a photovoltaic junction box according to claim 1, wherein: still include water tank (14), water injection structure (1) is fixed in water tank (14), water injection structure (1) is a piston structure, delivery port (3) set up on piston structure's a piston section of thick bamboo, still be provided with water inlet (2) on the piston section of thick bamboo, all be provided with the check valve on water inlet (2) and delivery port (3).
3. The water-cooling structure for dissipating heat of a photovoltaic junction box according to claim 2, wherein: the photovoltaic panel traction device is characterized in that the traction structure is a traction rope (8), a piston rod of the piston structure and a piston cylinder are respectively provided with a first anchor point (15) and a first guide ring (17), a rotatable part (10) of the photovoltaic panel support is provided with a second anchor point (12), a fixed part of the photovoltaic panel support is provided with second guide rings (20) (20), one end of the traction rope (8) is fixedly connected with the first anchor point (15), and the other end of the traction rope passes through the first guide ring (17), the second guide rings (20) (20) and the second anchor point (12).
4. The water-cooling structure for dissipating heat of a photovoltaic junction box according to claim 3, wherein: the piston structure is provided with a reset structure.
5. The water-cooling structure for dissipating heat of a photovoltaic junction box according to claim 2, wherein: the cold area pipeline (19) is an S-shaped rotary channel, the S-shaped rotary channel is positioned on one side face attached to a heating element in the photovoltaic junction box (5), the cold area pipeline (19) is provided with two pipe orifices, one pipe orifice is connected with the water outlet (3) of the piston structure through a water pipe (4), and the other pipe orifice is connected with the water tank (14) through another water pipe (4).
6. The water-cooling structure for dissipating heat of a photovoltaic junction box according to claim 3, wherein: still overlap on haulage rope (8) and have fag end (7), fag end (7) are the tubular structure that can not draw and rise, haulage rope (8) with fag end (7) hole slidable connection, fag end (7) one end and water tank (14) fixed connection, the other end with the fixed part fixed connection of photovoltaic board support.
7. The water-cooling structure for dissipating heat of a photovoltaic junction box according to claim 6, wherein: a buffer structure is arranged on a section of the traction rope (8) between the rope sleeve (7) and the rotatable part (10) of the photovoltaic panel support.
8. The water-cooling structure for dissipating heat of a photovoltaic junction box according to claim 2, wherein: the photovoltaic board support is used for installing the photovoltaic board, the opening of water tank (14) up, water tank (14) are located the downside on photovoltaic board lower limb.
9. The water-cooling structure for dissipating heat of a photovoltaic junction box according to claim 8, wherein: and a filtering structure (13) is arranged on an opening of the water tank (14) and is used for filtering water.
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| CN202210502128.2A CN114866021A (en) | 2022-05-10 | 2022-05-10 | Water cooling structure for heat dissipation of photovoltaic junction box |
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