Combiner box with thermal management system

Abstract

The invention belongs to the technical field of combiner boxes, and particularly relates to a combiner box with a thermal management system, the combiner box comprises a combiner box assembly and a support leg assembly, the combiner box assembly is used for converging electric energy generated by a photovoltaic panel, and the support leg assembly is used for supporting and fixing a box body. The heat conduction assembly can effectively condense a working medium volatilized due to heat absorption of the circuit breaker assembly or the fuse assembly in the heat dissipation assembly through underground low temperature in summer and conduct heat to the outside of the box body, so that the box body can effectively dissipate heat of heating elements in the box body all the year round.

Description

Technical Field

[0001] The present invention belongs to the technical field of combiner boxes, and in particular relates to a combiner box with a thermal management system. Background Art

[0002] The combiner box is an important electrical component of a photovoltaic power station, which has the function of bringing together the output lines of multiple photovoltaic panels.

[0003] The combiner box generally includes fuses, circuit breakers, lightning arresters and disconnectors. Circuit breakers and fuses generate a lot of heat on a daily basis. The combiner box generally has no heat dissipation function. The published patent with application number 202021188877.5 dissipates heat by adding a fan in the box and heat dissipation holes on the door. The patent with application number 201620844377.X improves the heat dissipation capacity of the combiner box by adding heat dissipation strips to the outer shell of the box. The heat dissipation structures of these two patents cannot accurately dissipate heat for electrical components in the box, resulting in high power consumption and unsatisfactory heat dissipation efficiency, especially for combiner boxes with high-power convergence.

[0004] Combined with the heat dissipation technology in other technical fields, cooling liquid or cooling gas can be used to cool electrical components in series or in parallel, such as Fig.21 and Fig. 22 shown.

[0005] like Fig.21 , the electrical components are arranged in series on the coolant or cooling air pipeline, and the coolant or cooling air flows through the electrical components in sequence, but such a design has the following problems: If one electrical component generates high temperature while other electrical components generate low temperature normally, the low-heating electrical component located behind the high-temperature heating electrical component will be heated by the coolant or cooling air heated by the high-temperature heating electrical component and affect normal operation.

[0006] like Fig. 22 , several branches are separated from the main road of the coolant or cooling air, and each branch flows through an electrical component. In this way, the temperature of the coolant or cooling air used to cool each electrical component is the same, but such a design has the following problems: If one of the electrical components is too hot, the cooling of other electrical components will not be affected. The amount of coolant or cooling air of the overheated electrical component is the same as that of other electrical components and cannot be changed to improve its heat dissipation efficiency. If at this time, the coolant or cooling air corresponding to the normally heated electrical component is reduced and supplemented to the high-heating electrical component, the utilization rate of the coolant or cooling air can be improved. Conventional technology will add valves to each branch to control the flow of coolant or cooling air in each branch, but this will inevitably increase the number of components in the box, thereby increasing the cost of the equipment.

[0007] In addition, the number of branch elements in the junction box is uncertain, and it is necessary to increase or decrease the number of branch elements according to the specific layout position. The branch elements here refer to fuses and circuit breakers, and how to quickly and flexibly connect fuses and circuit breakers to the cooling pipelines needs to be considered.

[0008] Furthermore, the temperature of the coolant or cooling gas needs to be low enough to achieve a good cooling effect. Air cooling is currently the lowest cost cooling method, but in summer, the temperature is very high, which will affect the cooling effect.

[0009] The present invention designs a junction box with a thermal management system to solve the above problems. Summary of the invention

[0010] Based on this, it is necessary to provide a junction box with a thermal management system to address the problems existing in the current junction box. In the present invention, the fuse assembly and the circuit breaker assembly as branch components can conduct their own heat generation to the heat dissipation assembly through their own structure during operation. The heat dissipation assembly effectively conducts the heat conducted by the circuit breaker assembly and the fuse assembly out of the box through the heat conduction assembly, thereby achieving the purpose of accurately dissipating the heat of the fuse assembly and the circuit breaker assembly as branch components. The fan in the circuit breaker assembly of the present invention uses the electricity generated by the photovoltaic panel to dissipate heat through the rectifier circuit module, effectively reducing its power consumption. The heat dissipation component in the present invention adopts the heat pipe principle to absorb the heat generated by the circuit breaker component and the fuse component matched therewith. The low-boiling-point working fluid in the mounting seat of the heat dissipation component is effectively supplemented from the normal low-heating circuit breaker component or fuse component to the high-heating circuit breaker component or fuse component under the action of the capillary absorption material, while ensuring that the high-heating fuse component or circuit breaker component uses the low-temperature working fluid in other parts to effectively dissipate heat, while improving the utilization rate of the working fluid in the low-heating circuit breaker component or fuse component. The heat dissipation component in the present invention can effectively coordinate the working mass at the high-heating circuit breaker component or fuse component and the normal low-heating circuit breaker component or fuse component, without adding components or valves with heat dissipation function to dissipate heat in the box or components, effectively reducing the cost of the heat dissipation structure added by the junction box. The circuit breaker assembly and fuse assembly in the present invention can be quickly and flexibly connected with the heat dissipation assembly with cooling function by plugging, without considering the number of circuit breaker components and fuse assemblies and the connection between the circuit breaker assembly and fuse assembly and the heat dissipation assembly. The heat conduction assembly in the present invention can use the low temperature underground in summer to effectively condense the working fluid volatilized by absorbing heat from the circuit breaker assembly or fuse assembly in the heat dissipation assembly and conduct the heat to the outside of the box, so that the box in the present invention can effectively dissipate heat for the heating elements in the box in all seasons.

[0011] The above purpose is achieved through the following technical solutions: A combiner box with a thermal management system, used for combining electric energy generated by photovoltaic panels, comprising: A junction box assembly is used to combine the electric energy generated by photovoltaic panels. The junction box assembly includes a box body, in which are arranged a plurality of branch element groups electrically connected to the photovoltaic panels and an isolating switch for combining the positive and negative poles of the electric energy on the branches where all the branch elements are located for output. The branch element group is composed of a fuse assembly, a circuit breaker assembly and a lightning arrester electrically connected in sequence. The box body is provided with a heat dissipation assembly that utilizes the heat pipe principle to absorb the heat generated by the fuse assembly and the circuit breaker assembly, and a heat conduction assembly that utilizes the underground low temperature to conduct the heat absorbed by the heat dissipation assembly to the outside of the box. The heat dissipation assembly can transfer the low-boiling-point working fluid located in the low-heat fuse assembly or the circuit breaker assembly to the high-heat fuse assembly or the circuit breaker assembly. A box door is hinged on the front side of the box body, and a waterproof and breathable valve is provided at the bottom of the box body.

[0012] The leg assembly is used to support and fix the box.

[0013] In one embodiment, the fuse assembly includes a first shell, a socket for cooperating with the heat dissipation assembly is opened on the rear side of the first shell, a straight surface is provided on the inner wall of the socket, a first socket for cooperating with the heat dissipation assembly is provided at the socket in the first shell, a straight surface is provided on the inner wall of the first socket, a second electrical connector electrically connected to the circuit breaker assembly through a wire and a first electrical connector electrically connected to the output end of the photovoltaic panel through a wire are provided at the top and bottom of the first shell, a second positioning sleeve and a first positioning sleeve are provided at the top and bottom of the first shell, an electrode column electrically connected to the second electrical connector and an electrode spring electrically connected to the first electrical connector are provided in the first positioning sleeve and the second positioning sleeve, a column sleeve is provided between the electrode column and the electrode spring, a fuse connecting the electrode column and the electrode spring is provided in the column sleeve, a thermal conductive seat opposite to the first socket is provided on the outside of the column sleeve, and a first locking screw cooperating with the heat dissipation assembly is provided in the threaded holes on the first shell and the first socket.

[0014] In one embodiment, the circuit breaker assembly includes a second shell, a ring sleeve is provided at the rear circular hole of the second shell, a coaxial second socket matched with the heat dissipation assembly is provided in the ring sleeve through a circumferentially distributed connecting rod, a straight surface is provided on the inner wall of the second socket, a third electrical connector electrically connected to the lightning arrester through a wire and a fourth electrical connector electrically connected to the second electrical connector in the corresponding fuse assembly through a wire are respectively provided at the top and bottom ends of the second shell, an opening is provided at the front bottom of the second shell, a filter screen for filtering air is provided at the opening through a clamping frame and a bolt seal, a rectifier circuit module electrically connected to the third electrical connector and the fourth electrical connector is provided in the second shell, a first motor is provided in the ring sleeve through a cross, a fan is provided on the output shaft of the first motor, a second locking screw matching with the heat dissipation assembly is provided in the threaded holes on the ring sleeve and the first socket, and a temperature sensor is provided on the wall surface of the second shell.

[0015] In one embodiment, the heat dissipation component includes two hollow mounting seats distributed up and down, wherein the mounting seats are provided with capillary material and filled with an appropriate amount of low-boiling-point working fluid, the front side of the upper mounting seat is provided with a plurality of hollow sockets which are connected to the interior and correspond one-to-one with the second socket in the circuit breaker assembly, the front side of the lower mounting seat is provided with a plurality of sockets which are connected to the interior and correspond one-to-one with the first socket in the fuse assembly, the socket is provided with a straight surface which matches the straight surface of the inner wall of the first socket or the second socket, capillary material is provided in the socket, the upper side of the mounting seat is provided with a plurality of cone sleeves which correspond one-to-one with the sockets and are connected to the interior, the upper end of the cone sleeve is provided with a conduit, the upper end of the conduit is provided with a condenser which is connected to the conduit, the inner wall of the conduit and the cone sleeve is evenly provided with drainage grooves in the circumferential direction, and the notch of the drainage groove is provided with a strip of capillary material which closes the drainage groove laterally and passes through up and down.

[0016] In one of the embodiments, a plurality of receiving grooves for allowing the guide tubes on another mounting seat to pass through are disposed on the rear side of one of the mounting seats.

[0017] In one embodiment, the leg assembly includes two semicircular tubes, both sides of the semicircular tubes are provided with slats, the slats on the same side of the two semicircular tubes are connected by bolts, and connecting plates are provided at both ends of the semicircular tubes, and the connecting plates are connected to the box or the hard foundation of the ground by bolts.

[0018] In one embodiment, the hard foundation is made of cast-in-place concrete.

[0019] In one of the embodiments, the heat-conducting component includes a blower disposed in the box and driven by a second motor, a first suction pipe and an exhaust pipe are respectively disposed at the air inlet and the air outlet of the blower, the exhaust pipe passes through the middle of the condenser pipe and is connected to the outside of the box, a plurality of guide rods are connected between the lower side of the exhaust pipe and the edge of the conduit pipe opening on the inner wall of the condenser pipe, a second valve assembly is disposed at the end of the exhaust pipe to enable one-way exhaust to the outside, a first valve assembly for one-way air intake under the negative pressure of the blower is disposed in the first suction pipe, the first suction pipe passes through the bottom of the box and the deep soil of the leg assembly, The lower end of the first suction pipe is closed, and a second suction pipe is arranged on the pipe wall of the first suction pipe, and the second suction pipe passes through the slots on the two semicircular tubes. An suction hood is arranged at the end of the second suction pipe, and a filter layer for filtering air is arranged in the suction hood. The first suction pipe is provided with a space which divides the part located in the soil into two parts from the axis line and is connected from the bottom, and one of the spaces is connected with the second suction pipe. A waterproof bag is arranged outside the underground part of the first suction pipe, and the waterproof bag is filled with sand. A water injection pipe is arranged on the upper side wall of the waterproof bag, and a sealing cover is arranged on the upper end of the water injection pipe.

[0020] In one of the embodiments, a heat insulation layer is disposed on the outer side of the first suction pipe to wrap the above-ground part thereof.

[0021] In one of the embodiments, the first valve assembly and the second valve assembly have the same structure, and the first valve assembly or the second valve assembly includes a guide sleeve arranged in the exhaust pipe or the first intake pipe through a plurality of circumferentially distributed fixing rods, a guide rod is slidably arranged in the guide sleeve, a valve plug for opening and closing the exhaust port in the exhaust pipe or the air inlet in the first intake pipe is arranged at one end of the guide rod, and a driving spring for driving the valve plug to close the exhaust port or the air inlet is connected between the valve plug and the guide sleeve.

[0022] The beneficial effects of the present invention are: 1. In the present invention, the fuse assembly and the circuit breaker assembly as branch components can transfer their own heat generation to the heat dissipation assembly during operation through their own structure. The heat dissipation assembly effectively transfers the heat transferred from the circuit breaker assembly and the fuse assembly out of the box through the heat conduction assembly, thereby achieving the purpose of accurately dissipating the heat of the fuse assembly and the circuit breaker assembly as branch components.

[0023] 2. The fan in the circuit breaker assembly of the present invention utilizes the electric energy generated by the photovoltaic panel to perform heat dissipation through the rectifier circuit module, thereby effectively reducing its power consumption.

[0024] 3. The heat dissipation component of the present invention adopts the heat pipe principle to absorb the heat generated by the circuit breaker component and the fuse component matched therewith. The low-boiling-point working fluid in the mounting seat of the heat dissipation component is effectively supplemented from the normally low-heating circuit breaker component or fuse component to the high-heating circuit breaker component or fuse component under the action of the capillary absorption material, thereby ensuring that the high-heating fuse component or circuit breaker component uses the low-temperature working fluid in other parts to effectively dissipate heat while improving the utilization rate of the working fluid in the low-heating circuit breaker component or fuse component.

[0025] 4. The heat dissipation assembly in the present invention can effectively coordinate the working quality of the high-heat circuit breaker assembly or fuse assembly and the normal low-heat circuit breaker assembly or fuse assembly. There is no need to add heat dissipation components or valves to dissipate heat inside the box or components, effectively reducing the cost of the heat dissipation structure added by the junction box.

[0026] 5. The circuit breaker assembly and the fuse assembly in the present invention can be quickly and flexibly connected with the heat dissipation assembly with cooling function by plugging, without considering the arrangement quantity of the circuit breaker components and the fuse assembly and the connection problem between the circuit breaker assembly and the fuse assembly and the heat dissipation assembly.

[0027] 6. The heat-conducting component in the present invention can utilize the low temperature underground in summer to effectively condense the working fluid volatilized in the heat dissipation component due to the heat absorption of the circuit breaker component or the fuse component, and conduct the heat to the outside of the box, so that the box in the present invention can effectively dissipate heat for the heating elements in the box all year round. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is an overall schematic diagram of the present invention; Figure 2 It is a top cross-sectional view of the combiner box assembly; Figure 3 is a side cutaway view of a combiner box assembly; Figure 4 are two overall cross-sectional views of the present invention; Figure 5 It is a cross-sectional view of the cooperation between the heat dissipation component and the heat conduction component in the combiner box assembly; Figure 6 is a cross-sectional view of a second valve assembly; Figure 7 is a cross-sectional view of a first valve assembly; Figure 8 is a cross-sectional view of the bottom structure of the heat conducting component; Fig. 9 It is a schematic diagram of the fuse assembly; Fig.10 These are two cross-sectional views of the fuse assembly and the heat sink assembly; Fig.11is a schematic diagram of the circuit breaker assembly; Fig.12 It is a cross-sectional view of the cooperation between the circuit breaker assembly and the heat dissipation assembly; Fig.13 is a schematic diagram of the heat dissipation component; Fig.14 It is a cross-sectional view of the cooperation between the heat dissipation component and the heat conduction component; Fig.15 It is a cross-sectional view of the inner wall structure of the conduit in the heat dissipation component; Fig.16 It is a schematic diagram of the heat conducting component; Fig.17 is a cross-sectional view of the bottom structure of the first air intake pipe in the heat conduction component; Fig.18 It is a cross-sectional view of the coordination between the outrigger assembly and the box body, and between the outrigger assembly and the hard foundation; Fig.19 is a schematic diagram of the semicircular tube structure in the outrigger assembly; Fig. 20 is a schematic diagram of a branch element group; Fig.21 It is a schematic diagram of series cooling of electrical components; Fig. 22 It is a schematic diagram of parallel cooling of electrical components; Name of the label in the figure: 100, combiner box assembly; 101, box body; 102, box door; 103, waterproof and breathable valve; 104, lightning arrester; 105, isolating switch; 106, branch element group; 200, fuse assembly; 201, first housing; 202, socket; 203, first socket; 204, first locking screw; 205, first electrical connector; 206, first positioning sleeve; 207, electrode spring; 208, second electrical connector; 209, second positioning sleeve; 210, electrode column; 211, column sleeve; 212, fuse; 213, thermal conductive seat; 300, circuit breaker assembly; 301, second housing; 302, ring; 303, connecting rod; 304, second socket; 305, second locking screw; 306, third electrical connector; 307, fourth electrical connector; 308, pressing frame; 309, filter; 310, rectifier circuit module; 311, fan; 312, first motor; 313, cross; 314, temperature sensor; 400, heat dissipation component; 401, mounting seat; 402, receiving groove; 403, socket; 404, cone sleeve; 405, conduit; 406, drainage groove; 407, capillary material; 408, condenser; 500, leg assembly; 501, semicircular tube; 502, slat; 503, connecting plate; 504, slot; 600, heat conduction component; 601, blower; 602, first air intake pipe; 603, partition; 604, second air intake pipe; 605, air intake cover; 606, filter layer; 607, waterproof bag; 608, water injection pipe; 609, cover; 610, sand; 611, heat insulation layer; 612, exhaust pipe; 613, drainage rod; 615, second motor; 616, first valve assembly; 617, second valve assembly; 618, guide sleeve; 619, fixing rod; 620, guide rod; 621, valve plug; 622, drive spring; 623, air inlet; 624, exhaust port; 701. Hard foundation; 702. Soil. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0030] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the orientation or position relationship indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0031] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0032] like Figure 1-Figure 20 As shown, a junction box with a thermal management system is used to combine the electric energy generated by photovoltaic panels, including: The combiner box assembly 100 is used to combine the electric energy generated by the photovoltaic panels. The combiner box assembly 100 includes a box body 101, and the box body 101 is provided with a plurality of branch element groups 106 electrically connected to the photovoltaic panels and an isolating switch 105 for outputting the positive and negative electrodes of the electric energy on the branches where all the branch elements are located. The branch element group 106 is composed of a fuse assembly 200, a circuit breaker assembly 300 and a lightning arrester 104 which are electrically connected in sequence. The box body 101 is provided with a fuse assembly that absorbs the heat of the fuse using the heat pipe principle. The heat dissipation component 400 generates heat from the fuse assembly 200 and the circuit breaker assembly 300, and the heat conduction component 600 utilizes the low temperature underground to conduct the heat absorbed by the heat dissipation component 400 to the outside of the box body 101. The heat dissipation component 400 can transfer the low-boiling-point working fluid located in the low-heat-generating fuse assembly 200 or the circuit breaker assembly 300 to the high-heat-generating fuse assembly 200 or the circuit breaker assembly 300. The front side of the box body 101 is hinged with a box door 102, and the bottom of the box body 101 is provided with a waterproof and breathable valve 103.

[0033] The leg assembly 500 is used to support and fix the box body 101 .

[0034] In a further embodiment, Fig. 9 , Fig.10 As shown, the fuse assembly 200 includes a first shell 201, a socket 202 for matching with the heat dissipation assembly 400 is provided at the rear side of the first shell 201, a straight surface is provided on the inner wall of the socket 202, a first socket 203 for matching with the heat dissipation assembly 400 is provided at the socket 202 in the first shell 201, a straight surface is provided on the inner wall of the first socket 203, a second electrical connector 208 electrically connected to the circuit breaker assembly 300 through a wire and a first electrical connector 205 electrically connected to the output end of the photovoltaic panel through a wire are respectively provided at the top and bottom of the first shell 201, and a first electrical connector 208 electrically connected to the output end of the photovoltaic panel through a wire is respectively provided at the top and bottom of the first shell 201. The second positioning sleeve 209 and the first positioning sleeve 206, the first positioning sleeve 206 and the second positioning sleeve 209 are respectively provided with an electrode column 210 electrically connected to the second electrical connector 208 and an electrode spring 207 electrically connected to the first electrical connector 205, a column sleeve 211 is provided between the electrode column 210 and the electrode spring 207, a fuse 212 connecting the electrode column 210 and the electrode spring 207 is provided in the column sleeve 211, a heat-conducting seat 213 opposite to the first socket 203 is provided on the outside of the column sleeve 211, and a first locking screw 204 cooperating with the heat dissipation component 400 is provided in the threaded holes on the first shell 201 and the first socket 203.

[0035] In a further embodiment, Fig.11 , Fig.12As shown, the circuit breaker assembly 300 includes a second housing 301, a ring sleeve 302 is provided at the rear circular hole of the second housing 301, a coaxial second socket 304 cooperating with the heat dissipation assembly 400 is provided in the ring sleeve 302 through a circumferentially distributed connecting rod 303, the inner wall of the second socket 304 is provided with a straight surface, the top and bottom ends of the second housing 301 are respectively provided with a third electrical connector 306 electrically connected to the lightning arrester 104 through a wire and a fourth electrical connector 307 electrically connected to the second electrical connector 208 in the corresponding fuse assembly 200 through a wire, and the front side of the second housing 301 is provided with a second electrical connector 208 in the ... An opening is provided at the bottom, and a filter screen 309 for filtering air is provided at the opening through a clamping frame 308 and a bolt seal, a rectifier circuit module 310 electrically connected to the third electrical connector 306 and the fourth electrical connector 307 is provided in the second shell 301, a first motor 312 is provided in the ring sleeve 302 through a cross 313, a fan 311 is provided on the output shaft of the first motor 312, a second locking screw 305 cooperating with the heat dissipation assembly 400 is provided in the threaded holes on the ring sleeve 302 and the first socket 203, and a temperature sensor 314 is provided on the wall surface of the second shell 301.

[0036] In a further embodiment, Fig.13 , Fig.14 , Fig.15 As shown, the heat dissipation assembly 400 includes two hollow mounting seats 401 distributed up and down, wherein the mounting seats 401 are provided with a capillary material 407 and filled with an appropriate amount of low-boiling-point working fluid, and the front side of the upper mounting seat 401 is provided with a plurality of hollow sockets 403 which are connected thereto and matched one-to-one with the second sockets 304 in the circuit breaker assembly 300, and the front side of the lower mounting seat 401 is provided with a plurality of sockets 403 which are connected thereto and matched one-to-one with the first sockets 203 in the fuse assembly 200, and the sockets 403 are provided with a plurality of sockets 403 which are connected thereto and matched one-to-one with the first sockets 203 or The straight surface of the inner wall of the second socket 304 matches the straight surface, and the socket 403 is provided with a capillary material 407. The upper side of the mounting seat 401 is provided with a plurality of conical sleeves 404 corresponding to the sockets 403 and connected thereto. The upper end of the conical sleeve 404 is provided with a conduit 405, and the upper end of the conduit 405 is provided with a condenser 408 connected thereto. The inner walls of the conduit 405 and the conical sleeve 404 are uniformly provided with drainage grooves 406 in the circumferential direction, and the notch of the drainage groove 406 is provided with a strip of capillary material 407 that closes the drainage groove 406 laterally and passes through it from top to bottom.

[0037] In a further embodiment, Fig.13 As shown, a plurality of receiving grooves 402 are provided on the rear side of one of the mounting seats 401 for the guide tubes 405 on the other mounting seat 401 to pass through.

[0038] In a further embodiment, Figure 1 , Figure 4 , Fig.18 As shown, the leg assembly 500 includes two semicircular tubes 501, and slats 502 are arranged on both sides of the semicircular tubes 501. The slats 502 on the same side of the two semicircular tubes 501 are connected by bolts. Connecting plates 503 are arranged at both ends of the semicircular tubes 501, and the connecting plates 503 are connected to the box 101 or the hard foundation 701 on the ground by bolts.

[0039] In a further embodiment, Figure 1 , Figure 2 As shown, the hard foundation 701 is made of cast-in-place concrete.

[0040] In a further embodiment, Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig.17 , Fig.18 As shown, the heat-conducting component 600 includes a blower 601 arranged in the box body 101 and driven by a second motor 615, and a first air intake pipe 602 and an exhaust pipe 612 are respectively arranged at the air inlet 623 and the air outlet of the blower 601, and the exhaust pipe 612 passes through the middle of the condenser pipe 408 and is connected to the outside of the box body 101, and a plurality of guide rods 613 are connected between the lower side of the exhaust pipe 612 and the edge of the pipe opening of the guide tube 405 on the inner wall of the condenser pipe 408, and a second valve component 617 is arranged at the end of the exhaust pipe 612 to enable one-way exhaust to the outside, and a first valve component 616 for one-way air intake under the negative pressure of the blower 601 is arranged in the first air intake pipe 602, and the first air intake pipe 602 passes through the bottom of the box body 101 and the deep soil 702 of the leg assembly 500. The lower end of the first air intake pipe 602 is closed, a second air intake pipe 604 is arranged on the pipe wall of the first air intake pipe 602, the second air intake pipe 604 passes through the slots 504 on the two semicircular tubes 501, an air intake cover 605 is arranged at the end of the second air intake pipe 604, a filter layer 606 for filtering air is arranged in the air intake cover 605, a space is arranged in the first air intake pipe 602 that divides the part located in the soil 702 into two parts from the axis line and is connected from the bottom, one of the spaces is connected with the second air intake pipe 604, a waterproof bag 607 is arranged outside the underground part of the first air intake pipe 602, the waterproof bag 607 is filled with sand 610, a water injection pipe 608 is arranged on the upper side wall of the waterproof bag 607, and a sealing cover 609 is arranged on the upper end of the water injection pipe 608.

[0041] In a further embodiment, Figure 7 , Figure 8As shown, a heat insulation layer 611 is provided on the outer side of the first air intake pipe 602 to wrap the above-ground part thereof.

[0042] In a further embodiment, Figure 6 , Figure 7 As shown, the first valve assembly 616 and the second valve assembly 617 have the same structure. The first valve assembly 616 or the second valve assembly 617 includes a guide sleeve 618 arranged in the exhaust pipe 612 or the first intake pipe 602 through a plurality of circumferentially distributed fixed rods 619, a guide rod 620 is slidably arranged in the guide sleeve 618, and a valve plug 621 for switching the exhaust port 624 in the exhaust pipe 612 or the air inlet 623 in the first intake pipe 602 is arranged at one end of the guide rod 620, and a driving spring 622 for driving the valve plug 621 to close the exhaust port 624 or the air inlet 623 is connected between the valve plug 621 and the guide sleeve 618.

[0043] In the present invention, the fuse assembly 200 and the circuit breaker assembly 300 as branch circuit elements can conduct their own heat generation to the heat dissipation assembly 400 through their own structure during operation. The heat dissipation assembly 400 effectively conducts the heat conducted by the circuit breaker assembly 300 and the fuse assembly 200 out of the box 101 through the heat conduction assembly 600, so as to achieve the purpose of accurately dissipating the heat of the fuse assembly 200 and the circuit breaker assembly 300 as branch circuit elements. The fan 311 in the circuit breaker assembly 300 of the present invention uses the electric energy generated by the photovoltaic panel to dissipate heat through the rectifier circuit module 310, effectively reducing its power consumption. The heat dissipation component 400 of the present invention adopts the heat pipe principle to absorb the heat generated by the circuit breaker component 300 and the fuse component 200 matched therewith. The low-boiling-point working fluid in the mounting seat 401 of the heat dissipation component 400 is effectively supplemented from the normally low-heating circuit breaker component 300 or fuse component 200 to the high-heating circuit breaker component 300 or fuse component 200 under the action of the capillary absorption material 407, thereby ensuring that the high-heating fuse component 200 or circuit breaker component 300 uses the low-temperature working fluid in other parts to effectively dissipate heat, while improving the utilization rate of the working fluid in the low-heating circuit breaker component 300 or fuse component 200. The heat dissipation assembly 400 in the present invention can effectively coordinate the working quality of the high-heating circuit breaker assembly 300 or fuse assembly 200 and the normal low-heating circuit breaker assembly 300 or fuse assembly 200, without adding components or valves with heat dissipation functions to dissipate heat in the box body 101 or components, effectively reducing the cost of the heat dissipation structure added by the junction box. The circuit breaker assembly 300 and the fuse assembly 200 in the present invention can be quickly and flexibly connected and matched with the heat dissipation assembly 400 with a cooling function by plugging, without considering the number of circuit breaker components and fuse assembly 200 and the connection between the circuit breaker assembly 300 and the fuse assembly 200 and the heat dissipation assembly 400. The heat-conducting component 600 in the present invention can utilize the low temperature of the underground in the summer to effectively condense the working fluid volatilized in the heat dissipation component 400 due to absorbing heat from the circuit breaker component 300 or the fuse component 200, and conduct the heat to the outside of the box 101, so that the box 101 in the present invention can effectively dissipate heat for the heating elements in the box 101 all year round.

[0044] The operation process of the present invention is as follows: Open the cover 609 as needed and inject water into the sand 610 in the waterproof bag 607 through the water injection pipe 608. Since water has a large specific heat, it can always maintain its cooling ability on the first intake pipe 602 surrounded by the underground soil 702, so that the first intake pipe 602 always maintains a relatively low temperature. When the condenser 408 in the heat dissipation component 400 needs to dissipate heat, the water-injected sand 610 around the first intake pipe 602 has a sufficient cooling effect on the air entering and moving along both sides of the partition 603. At the same time, the insulation layer 611 on the outside of the first intake pipe 602 can effectively block the heat exchange between the inside and outside of the first intake pipe 602, thereby ensuring that the air reaching the exhaust pipe 612 has sufficient cooling capacity to keep a relatively low temperature in the condenser 408, so that the working fluid vapor entering the condenser 408 from the conduit 405 can be quickly and effectively condensed and circulated back to the mounting seat 401 through the drainage grooves 406 densely distributed on the inner wall of the conduit 405 and the cone sleeve 404.

[0045] The fuse assembly 200 is installed on the corresponding socket 403 on the corresponding mounting seat 401, and the first socket 203 is inserted into the corresponding socket 403 of the corresponding mounting seat 401, so that the front end of the socket 403 is in close contact with the corresponding thermal conductive seat 213, and then the corresponding first locking screw 204 is tightened to complete the locking of the fuse assembly 200 on the corresponding socket 403.

[0046] The circuit breaker assembly 300 is installed on the corresponding socket 403 on the corresponding mounting seat 401, and the second socket 304 is inserted into the corresponding socket 403 of the corresponding mounting seat 401, so that there is a large gap between the end of the ring sleeve 302 and the corresponding mounting seat 401, and then the corresponding second locking screw 305 is tightened to complete the locking of the circuit breaker assembly 300 on the corresponding socket 403.

[0047] Next, the first electrical connector 205 is connected to the corresponding output end of the corresponding photovoltaic panel through a wire, the second electrical connector 208 is connected to the fourth electrical connector 307 of the corresponding circuit breaker assembly 300 through a wire, and the third electrical connector 306 on the circuit breaker assembly 300 is connected to the corresponding lightning arrester 104 through a wire.

[0048] Start the blower 601, which generates negative pressure in the upper end of the first air intake pipe 602. The outside air reaches the blower 601 through the filter layer 606 in the air intake cover 605, the second air intake pipe 604 and the connection port at the lower end of the partition 603 and enters the exhaust pipe 612. The valve plug 621 in the first valve assembly 616 opens the air inlet 623 under the negative pressure and the top pressure of the outside air and further compresses the corresponding driving spring 622. When the air moves on both sides of the partition 603, the waterproof bag 60 The water-injected sand 610 in 7 has a sufficient cooling effect on the air entering and moving along the two sides of the partition 603. At the same time, the insulation layer 611 on the outside of the first intake pipe 602 can effectively block the heat exchange between the inside and the outside, thereby ensuring that the air reaching the exhaust pipe 612 has enough cooling capacity to maintain a lower temperature environment in the condenser 408. The valve plug 621 in the second valve assembly 617 opens the exhaust port 624 under the action of the air pressure in the exhaust pipe 612 and further compresses the corresponding drive spring 622.

[0049] When the fuse 212 in a fuse assembly 200 is abnormally heated, the heat generated by the fuse 212 is transferred to the capillary material 407 at the corresponding position in the mounting seat 401 through the corresponding column sleeve 211, the heat-conducting seat 213 and the socket 403, and the low-boiling-point working fluid at the corresponding position in the mounting seat 401 is evaporated by heat, and the vaporized working fluid moves upward along the corresponding conduit 405 to the condenser 408, and the working fluid vapor entering the condenser 408 is quickly and effectively discharged on the outer wall of the exhaust pipe 612. Condensation forms droplets, which, under the action of gravity, travel along the drainage rod 613 to the bottom of the condenser 408 and reach the mouth of the corresponding conduit 405. The working fluid droplets that reach the mouth of the conduit 405 flow back along the drainage groove 406 toward the mounting seat 401 under the action of gravity. At the same time, the strip-shaped capillary material 407 at the groove of the drainage groove 406 can accelerate the downward movement speed of the working fluid droplets in the drainage groove 406, thereby completing the circulation reflux of the working fluid into the mounting seat 401.

[0050] When a circuit breaker assembly 300 generates abnormally high temperature, the temperature sensor 314 on the corresponding second shell 301 senses the increase in internal temperature and controls the operation of the first motor 312 through the rectifier circuit module 310. The first motor 312 drives the fan 311 to rotate. The fan 311 discharges the heat generated in the second shell 301 through the gap between the ring sleeve 302 and the second socket 304. Another part of the heat generated in the second shell 301 is conducted to the low-boiling-point working medium in the mounting seat 401 through the corresponding socket 403, causing the working medium at the corresponding location to evaporate and gasify. Negative pressure is generated in the second shell 301, and the outside air is filtered through the filter 309 and enters the second shell 301 to replenish the second shell 301 with cold air. The vaporized working fluid moves upward along the corresponding conduit 405 to the condenser 408, and the working fluid vapor entering the condenser 408 is quickly and effectively condensed on the outer wall of the exhaust pipe 612 to form droplets. The formed droplets reach the bottom of the condenser 408 and reach the pipe mouth of the corresponding conduit 405 along the drainage rod 613 under the action of gravity. The working fluid droplets reaching the pipe mouth of the conduit 405 flow back along the drainage groove 406 toward the mounting seat 401 under the action of gravity. At the same time, the strip-shaped capillary suction material 407 at the groove of the drainage groove 406 can accelerate the downward movement speed of the working fluid droplets in the drainage groove 406, thereby completing the circulation reflux of the working fluid into the mounting seat 401.

[0051] The rectifier circuit module 310 in the circuit breaker assembly 300 is in a state of using the power of the photovoltaic panel to power the first motor 312 when the corresponding circuit breaker assembly 300 is turned on, and the rectifier circuit module 310 in the circuit breaker assembly 300 is in a state of disconnecting the power to the first motor 312 when the corresponding circuit breaker assembly 300 is turned off.

[0052] The position where the circuit breaker assembly 300 or the fuse assembly 200 generates more heat and has a higher temperature, the more the working fluid evaporates at the corresponding position, and the working fluid at the circuit breaker assembly 300 or the fuse assembly 200 with a lower temperature and less heat generation flows to the circuit breaker assembly 300 or the fuse assembly 200 with higher heat generation for replenishment under the capillary action of the capillary material 407, so that more working fluid is evaporated at the high heat generation location and the heat dissipation is greater, while the reduced working fluid at the circuit breaker assembly 300 or the fuse assembly 200 with a lower temperature and less heat generation can also meet the heat dissipation and cooling of the circuit breaker assembly 300 or the fuse assembly 200 at the corresponding location.

Claims

1. A combiner box with a thermal management system, used for combining the electric energy produced by photovoltaic panels, characterized in that: include: A junction box assembly is used to combine the electric energy generated by the photovoltaic panels. The junction box assembly includes a box body, in which are arranged a plurality of branch element groups electrically connected to the photovoltaic panels and an isolating switch for combining the positive and negative poles of the electric energy on the branches where all the branch elements are located. The branch element group is composed of a fuse assembly, a circuit breaker assembly and a lightning arrester electrically connected in sequence. The box body is provided with a heat dissipation assembly that utilizes the heat pipe principle to absorb the heat generated by the fuse assembly and the circuit breaker assembly, and a heat conduction assembly that utilizes the underground low temperature to conduct the heat absorbed by the heat dissipation assembly to the outside of the box. The heat dissipation assembly can distribute the low-boiling-point working fluid located at the low-heat fuse assembly or the circuit breaker assembly to the high-heat fuse assembly or the circuit breaker assembly. The front side of the box body is hinged with a box door, and the bottom of the box body is provided with a waterproof and breathable valve; The leg assembly is used to support and fix the box.

2. A combiner box with a thermal management system according to claim 1, characterized in that: The fuse assembly includes a first shell, a socket matched with the heat dissipation assembly is provided on the rear side of the first shell, a straight surface is provided on the inner wall of the socket, a first socket matched with the heat dissipation assembly is provided at the socket in the first shell, a straight surface is provided on the inner wall of the first socket, a second electrical connector electrically connected to the circuit breaker assembly through a wire and a first electrical connector electrically connected to the output end of the photovoltaic panel through a wire are provided at the top and bottom of the first shell, a second positioning sleeve and a first positioning sleeve are provided at the top and bottom of the first shell, an electrode column electrically connected to the second electrical connector and an electrode spring electrically connected to the first electrical connector are provided in the first positioning sleeve and the second positioning sleeve, a column sleeve is provided between the electrode column and the electrode spring, a fuse connecting the electrode column and the electrode spring is provided in the column sleeve, a heat-conducting seat opposite to the first socket is provided on the outside of the column sleeve, and a first locking screw matched with the heat dissipation assembly is provided in the threaded holes on the first shell and the first socket.

3. A combiner box with a thermal management system according to claim 2, characterized in that: The circuit breaker assembly includes a second shell, a ring sleeve is provided at the rear circular hole of the second shell, a coaxial second socket matched with the heat dissipation assembly is provided in the ring sleeve through circumferentially distributed connecting rods, a straight surface is provided on the inner wall of the second socket, a third electric connector electrically connected to the lightning arrester through a wire and a fourth electric connector electrically connected to the second electric connector in the corresponding fuse assembly through a wire are respectively provided at the top and bottom of the second shell, an opening is provided at the front bottom of the second shell, a filter screen for filtering air is provided at the opening through a clamping frame and a bolt seal, a rectifier circuit module electrically connected to the third electric connector and the fourth electric connector is provided in the second shell, a first motor is provided in the ring sleeve through a cross, a fan is provided on the output shaft of the first motor, a second locking screw matched with the heat dissipation assembly is provided in the threaded holes on the ring sleeve and the first socket, and a temperature sensor is provided on the wall surface of the second shell.

4. A combiner box with a thermal management system according to claim 1, characterized in that: The heat dissipation component includes two hollow mounting seats distributed up and down, wherein the mounting seats are provided with capillary suction material and filled with an appropriate amount of low-boiling-point working fluid, the front side of the upper mounting seat is provided with a plurality of hollow sockets which are connected with the inner part and which correspond one-to-one with the second socket in the circuit breaker assembly, the front side of the lower mounting seat is provided with a plurality of sockets which are connected with the inner part and which correspond one-to-one with the first socket in the fuse assembly, the socket is provided with a straight surface which matches with the straight surface of the inner wall of the first socket or the second socket, capillary suction material is provided in the socket, the upper side of the mounting seat is provided with a plurality of cone sleeves which correspond one-to-one with the sockets and are connected with the inner part, the upper end of the cone sleeve is provided with a conduit, the upper end of the conduit is provided with a condenser which is connected with the conduit, the inner wall of the conduit and the cone sleeve is evenly provided with drainage grooves in the circumferential direction, and the notch of the drainage groove is provided with a strip of capillary suction material which closes the drainage groove laterally and passes through up and down.

5. A combiner box with a thermal management system according to claim 4, characterized in that: The rear side of one of the mounting seats is provided with a plurality of accommodating grooves for the guide tubes on the other mounting seat to pass through.

6. A combiner box with a thermal management system according to claim 1, characterized in that: The leg assembly includes two semicircular tubes, with slats on both sides of the semicircular tubes. The slats on the same side of the two semicircular tubes are connected by bolts. Connecting plates are provided at both ends of the semicircular tubes, and the connecting plates are connected to the box or the hard foundation of the ground by bolts.

7. A combiner box with a thermal management system according to claim 6, characterized in that: The hard foundation is formed by cast-in-place concrete.

8. A combiner box with a thermal management system according to claim 6, characterized in that: The heat-conducting component includes a blower arranged in the box and driven by a second motor, a first suction pipe and an exhaust pipe are respectively arranged at the air inlet and the air outlet of the blower, the exhaust pipe passes through the middle of the condenser pipe and is connected to the outside of the box, a plurality of guide rods are connected between the lower side of the exhaust pipe and the edge of the conduit pipe opening on the inner wall of the condenser pipe, a second valve assembly is arranged at the end of the exhaust pipe to enable one-way exhaust to the outside, a first valve assembly for one-way air intake under the negative pressure of the blower is arranged in the first suction pipe, the first suction pipe passes through the bottom of the box and the deep soil of the leg assembly, and the first suction pipe The lower end of the air pipe is closed, a second air intake pipe is arranged on the pipe wall of the first air intake pipe, the second air intake pipe passes through the slots on the two semicircular tubes, an air intake hood is arranged at the end of the second air intake pipe, a filter layer for filtering air is arranged in the air intake hood, a space is arranged in the first air intake pipe which divides the part located in the soil into two parts from the axis line and is connected from the bottom, one of the spaces is connected with the second air intake pipe, a waterproof bag is arranged outside the underground part of the first air intake pipe, the waterproof bag is filled with sand, a water injection pipe is arranged on the upper side wall of the waterproof bag, and a sealing cover is arranged on the upper end of the water injection pipe.

9. A combiner box with a thermal management system according to claim 8, characterized in that: The outer side of the first suction pipe is provided with a heat insulation layer which wraps the above-ground part thereof.

10. A combiner box with a thermal management system according to claim 8, characterized in that: The first valve assembly and the second valve assembly have the same structure. The first valve assembly or the second valve assembly includes a guide sleeve arranged in the exhaust pipe or the first intake pipe through a plurality of circumferentially distributed fixing rods. A guide rod is slidably arranged in the guide sleeve. A valve plug for opening and closing the exhaust port in the exhaust pipe or the air inlet in the first intake pipe is arranged at one end of the guide rod. A driving spring for driving the valve plug to close the exhaust port or the air inlet is connected between the valve plug and the guide sleeve.

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