A temperature overload protection device for photovoltaic power generation combiner box

Abstract

The present application relates to a temperature overload protection device for a photovoltaic power generation junction box, and belongs to the technical field of photovoltaic power generation. The temperature overload protection device includes: a protection unit, a junction unit and a thermal sensing unit, the junction unit and the thermal sensing unit are both arranged inside the protection unit, and the thermal sensing unit is electrically connected to the junction unit, a heat exchange unit is arranged on the outside of the protection unit, the heat exchange unit penetrates to the inside of the protection unit, and the heat exchange unit is connected to a cooling unit arranged inside the protection unit, the cooling unit is located on the peripheral side of the junction unit, so as to adjust the temperature of the peripheral side of the junction unit through the cooperation of the cooling unit and the heat exchange unit. The present application can maintain the accuracy of the temperature sensor inside the existing photovoltaic power generation junction box within a relatively high range, while extending the service life of the temperature sensor inside the photovoltaic power generation junction box.

Description

Technical Field

[0001] The present application relates to the technical field of photovoltaic power generation, and in particular to a temperature overload protection device for a photovoltaic power generation combiner box. Background Art

[0002] Photovoltaic power generation is a technology that directly converts light energy into electrical energy by utilizing the photovoltaic effect of semiconductor interfaces. As a clean, safe and renewable energy source, it has broad development prospects and application potential. Among them, photovoltaic power generation mainly consists of three parts: solar panels (assemblies), controllers and inverters. The main components are composed of electronic components. After solar cells are connected in series and packaged for protection, they can form large-area solar cell modules, which are then combined with power controllers and other components to form photovoltaic power generation devices.

[0003] The existing photovoltaic power generation combiner box is a key component in the photovoltaic power generation controller. It is mainly used to collect current from multiple photovoltaic cell modules. At the same time, it can perform primary current convergence on the input of the photovoltaic cell array to reduce the wiring of the photovoltaic cell array to the inverter, optimize the system structure, and improve reliability and maintainability. The current photovoltaic power generation combiner box usually uses a temperature sensor to monitor the internal temperature of the combiner box, and triggers an alarm or power-off protection when the temperature exceeds the preset threshold. However, due to the relatively closed structure, the internal temperature cannot be dissipated, resulting in the internal temperature being maintained in a high range for a long time, which reduces the accuracy of the temperature sensor inside the photovoltaic power generation combiner box and causes the protection to fail. Summary of the invention

[0004] In order to maintain the accuracy of the temperature sensor inside the existing photovoltaic power generation combiner box within a higher range and at the same time extend the service life of the temperature sensor inside the photovoltaic power generation combiner box, the present application provides a temperature overload protection device for a photovoltaic power generation combiner box.

[0005] The temperature overload protection device for a photovoltaic power generation combiner box provided in the present application adopts the following technical solution:

[0006] A temperature overload protection device for a photovoltaic power generation junction box comprises: a protection unit, a junction unit and a thermal sensing unit, wherein the junction unit and the thermal sensing unit are both arranged inside the protection unit, and the thermal sensing unit is electrically connected to the junction unit, a heat exchange unit is arranged on the outside of the protection unit, the heat exchange unit penetrates to the inside of the protection unit, and the heat exchange unit is connected to a cooling unit arranged inside the protection unit, and the cooling unit is located on the peripheral side of the junction unit so as to adjust the temperature of the peripheral side of the junction unit through the cooperation of the cooling unit and the heat exchange unit.

[0007] By adopting the above technical solution, the protection unit can protect the whole of the confluence unit and the thermal sensing unit. The confluence unit can electrically connect the photovoltaic module and the inverter to realize the transmission and storage of electric energy, and the thermal sensing unit can monitor the temperature inside the protection unit in real time when the confluence unit is working, so as to control the confluence unit to perform circuit breaking protection when the temperature inside the protection unit is too high, thereby effectively extending the service life of the confluence unit.

[0008] In addition, compared with the temperature overload protection device of the existing photovoltaic power generation junction box, the technical solution of the present application can effectively cool down the surrounding side of the junction unit by setting a cooling unit inside the protection unit, so that the cooling unit and the heat exchange unit can cooperate to maintain the temperature inside the protection unit at a lower value, which is beneficial to reduce the situation where the accuracy of the thermal sensing unit inside the protection unit decreases due to long-term high temperature, thereby extending the service life of the thermal sensing unit inside the photovoltaic power generation junction box, and effectively improving the sensing sensitivity of the thermal sensing unit when the temperature inside the junction unit exceeds the preset value, thereby achieving the purpose of further extending the service life of the existing photovoltaic power generation junction box.

[0009] Optionally, the protection unit includes: a protection member and a mounting member, the protection member is integrally covered on the outside of the confluence unit and the thermal sensing unit, and the mounting member is arranged on the side wall of the protection member to facilitate assembly and positioning of the protection member.

[0010] By adopting the above technical solution, the protective component can effectively protect the internal junction unit and the thermal sensing unit, reduce the influence of the external environment on the junction unit and the thermal sensing unit during use, and improve the operating safety of the photovoltaic power generation junction box. The setting of the mounting component makes it easy to install the protective component on the corresponding supporting part, which is convenient for the subsequent operation and use of the photovoltaic power generation junction box.

[0011] Optionally, the convergence unit includes: a circuit breaker, a monitoring component and a transmission component, wherein the circuit breaker, the monitoring component and the transmission component are all arranged on the inner wall of the protective component, and the circuit breaker, the monitoring component and the transmission component are all electrically connected, the transmission component is used to be electrically connected to the photovoltaic component and the inverter, and the monitoring component is electrically connected to the thermal sensing unit so as to realize the control of the circuit breaker by the monitoring component through the sensing of temperature changes by the thermal sensing unit.

[0012] By adopting the above-mentioned technical scheme, the transmission component can provide an electrical connection, so that the photovoltaic power generation junction box of the present application can conduct current between the photovoltaic components and the inverter, and the circuit breaker can be used to control the on and off of the current in the transmission component of the photovoltaic power generation junction box, so as to perform maintenance and overheating protection when necessary. In addition, the set monitoring component can be used to monitor and manage the operating status of the photovoltaic power generation junction box in real time, including monitoring of parameters such as current, voltage, temperature, and fault diagnosis and alarm. At the same time, the electrical coordination between the monitoring component and the thermal sensing unit can realize real-time monitoring and management of the temperature in the protective component, so that the circuit breaker can realize overheating protection of the photovoltaic power generation junction box under the electrical control of the monitoring component.

[0013] Optionally, the thermal sensing unit includes: a temperature control unit, at least two of which are provided, the two temperature control units are respectively located on the inner walls on opposite sides of the protective component, and the two temperature control units are electrically connected to the monitoring component.

[0014] By adopting the above technical solution, at least two temperature control units are set up to better monitor the temperature of multiple positions inside the protective component, so that when the accuracy of one of the temperature control units decreases, the other temperature control unit can be used to monitor and alarm the external temperature of the convergence unit, thereby better improving the protection of the internal structure of the convergence unit.

[0015] Optionally, the cooling unit includes: a first flow guide, a second flow guide and a convection member, the first flow guide and the second flow guide are respectively arranged on both sides of the protective member and are located on the outside of the confluence unit, the first flow guide and the second flow guide are both connected to the heat exchange unit, and the convection member is arranged on the side walls of the first flow guide and the second flow guide to increase the gas flow speed outside the confluence unit through the convection member.

[0016] By adopting the above technical solution, the first guide member and the second guide member can guide the coolant delivered from the heat exchange unit inside the protective member, so that the external environment of the confluence unit can be heat exchanged through the continuous flow of the coolant inside the first guide member and the second guide member, which is beneficial to reducing the situation where the monitoring accuracy of the temperature control unit decreases due to the continuous high temperature. At the same time, the convection member can be used to enhance the flow rate of the air inside the protective member, thereby further reducing the continuous accumulation of overheated air on the side around the temperature control unit, thereby better improving the protection of the temperature control unit.

[0017] Optionally, the heat exchange unit includes: a storage component and a guiding component, the storage component is arranged on the outside of the protective component and is used to store the coolant, and the guiding component is connected to the side wall of the storage component and is in communication with the first guide component and the second guide component.

[0018] By adopting the above technical solution, the storage member provided can facilitate the cooling of the coolant on the outside of the protective member, and then re-send it to the first guide member and the second guide member inside the protective member through the conveying action of the guide member, so that the first guide member and the second guide member can continuously cool the external environment of the confluence unit inside the protective member, which is beneficial to reduce the situation where the temperature control unit inside the protective member is continuously exposed to a high temperature environment, resulting in a decrease in monitoring accuracy.

[0019] Optionally, the cooling unit also includes: an extension member, a heat dissipation member and an auxiliary member, the extension member is movably arranged on the side walls of the first guide member and the second guide member and is connected to the convection member, the heat dissipation member is arranged on the side walls of the first guide member and the second guide member and is located on the inner side of the extension member, the auxiliary member is movably arranged on the side walls of the first guide member and the second guide member and can correspond to the position of the convection member, so as to adjust the overall position of the convection member and the extension member through the auxiliary member, thereby better improving the heat exchange area between the airflow in the protective member and the first guide member and the second guide member through the heat dissipation member.

[0020] By adopting the above technical scheme, the set extension piece can flexibly change its position on the side walls of the first guide piece and the second guide piece in cooperation with the auxiliary feeding piece, so as to more effectively enhance the heat exchange efficiency of the first guide piece and the second guide piece through the heat sinks arranged on the side walls of the first guide piece and the second guide piece. When the temperature around the first guide piece and the second guide piece continues to be too high, rapid heat exchange can be carried out more promptly through the heat sinks on the side walls of the first guide piece and the second guide piece, thereby better improving the protection effect of the temperature control unit arranged inside the protective piece.

[0021] Optionally, the cooling unit also includes: a sensing component, which is arranged on the side wall of the extension component and can monitor the liquid flow rate inside the extension component, and the sensing component is electrically connected to the auxiliary component so that the position of the auxiliary component on the side wall of the first guide component or the second guide component can be adjusted through the sensing component.

[0022] By adopting the above-mentioned technical scheme, the set sensing member can monitor the liquid flow rate inside the first flow guide member and the second flow guide member in real time, so as to adjust the position of the auxiliary member on the side wall of the first flow guide member and the second flow guide member according to the change of the liquid flow rate inside the first flow guide member and the second flow guide member, thereby facilitating the synchronous adjustment of the position of the extension member by changing the position of the auxiliary member.

[0023] Optionally, the cooling unit further includes: a limiting member, which is arranged on the outside of the heat dissipation member and connected to the extending member.

[0024] By adopting the above technical solution, the provided limiting member can limit the position of the movement of the extension member, thereby effectively improving the movement stability of the extension member.

[0025] Optionally, the cooling unit further includes: a return member, which is arranged on a side wall of the limiting member and is respectively connected to the extending member and the limiting member.

[0026] By adopting the above technical solution, the return member can reset the extension member in cooperation with the limit member, so that the extension member re-covers the outer sides of the first guide member and the second guide member at the corresponding position, thereby effectively improving the heat exchange efficiency of the first guide member and the second guide member through the extension member when the amount of coolant flowing in decreases.

[0027] In summary, the present application includes at least one of the following beneficial technical effects:

[0028] 1. Through the protection unit, the junction unit and the thermal sensing unit can be used as a whole for protection. The junction unit can electrically connect the photovoltaic module and the inverter to realize the transmission and storage of electric energy, and the thermal sensing unit can monitor the temperature inside the protection unit in real time when the junction unit is working, so as to control the junction unit to perform circuit breaking protection when the temperature inside the protection unit is too high, thereby effectively extending the service life of the junction unit. In addition, compared with the temperature overload protection device of the existing photovoltaic power generation junction box, the technical solution of the present application can effectively cool down the surrounding side of the junction unit by setting a cooling unit inside the protection unit, so that the cooling unit and the heat exchange unit can cooperate to maintain the temperature inside the protection unit at a lower value, which is conducive to reducing the situation where the accuracy of the thermal sensing unit inside the protection unit decreases due to long-term high temperature, thereby extending the service life of the thermal sensing unit inside the photovoltaic power generation junction box, effectively improving the sensing sensitivity of the thermal sensing unit when the temperature inside the junction unit exceeds the preset value, and achieving the purpose of further extending the service life of the existing photovoltaic power generation junction box;

[0029] 2. The first guide member and the second guide member can guide the coolant delivered from the heat exchange unit inside the protective member, so that the external environment of the confluence unit can be heat-exchanged by the continuous flow of the coolant inside the first guide member and the second guide member, which is helpful to reduce the situation where the monitoring accuracy of the temperature control unit decreases due to the continuous high temperature. At the same time, the convection member can be used to enhance the flow speed of the air inside the protective member, thereby further reducing the continuous accumulation of overheated air around the temperature control unit, thereby better improving the protection of the temperature control unit;

[0030] 3. The extending member can flexibly change its position on the side wall of the first guide member and the second guide member in cooperation with the auxiliary member, so as to more effectively enhance the heat exchange efficiency of the first guide member and the second guide member through the heat sinks arranged on the side walls of the first guide member and the second guide member. When the temperature around the first guide member and the second guide member is continuously too high, the heat sinks on the side walls of the first guide member and the second guide member can be used to quickly exchange heat in a timely manner, thereby better improving the protection effect of the temperature control unit arranged inside the protective member;

[0031] 4. By means of the arranged sensing element, the liquid flow rate inside the first flow guide element and the second flow guide element can be monitored in real time, so as to adjust the position of the auxiliary element on the side walls of the first flow guide element and the second flow guide element according to the change of the liquid flow rate inside the first flow guide element and the second flow guide element, thereby facilitating the synchronous adjustment of the position of the extension element by changing the position of the auxiliary element. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the structure of the temperature overload protection device of an embodiment of the present application;

[0033] Figure 2 yes Figure 1 A magnified view of part A;

[0034] Figure 3 yes Figure 1 A magnified view of part B;

[0035] Figure 4 is a schematic structural diagram of a first flow guide member and an extension member in an embodiment of the present application;

[0036] Figure 5 It is a schematic diagram of the structure of the first outer tube, the second inner tube and the third inner tube in the embodiment of the present application;

[0037] Figure 6 yes Figure 5 Enlarged view of part C;

[0038] Figure 7 yes Figure 5 A magnified view of part D in the middle;

[0039] Figure 8 It is a structural schematic diagram of the auxiliary delivery component of the embodiment of the present application;

[0040] Fig. 9 It is a schematic diagram of the structure of the first flow guide member, the extension member and the auxiliary delivery member in the embodiment of the present application.

[0041] Description of reference numerals:

[0042] 1. Protection unit; 11. Protection member; 12. Mounting member; 2. Converging unit; 21. Circuit breaker; 22. Monitoring member; 23. Transmission member; 3. Thermal sensing unit; 31. Temperature control member; 4. Heat exchange unit; 41. Storage member; 42. Guide member; 5. Cooling unit; 51. First guide member; 511. Cooling pipe; 511a. First inner pipe; 511b. Second inner pipe; 511c. Third inner pipe; 511d. Matching ring; 511e. Snap ring; 511f. Temperature sensor; 511g. Inlet; 52. Second guide member Flow part; 53, convection part; 54, extension part; 541, first outer tube; 541a, first baffle; 541b, second baffle; 541c, adjustment rod; 541d, adjustment block; 542, second outer tube; 55, heat dissipation part; 56, auxiliary feeding part; 561, sleeve ring; 562, driven gear; 563, driving gear; 564, positioning rod; 565, wind shield; 566, servo motor; 567, toggle block; 57, induction part; 58, limit part; 581, guide rail; 582, guide block; 59, return part. DETAILED DESCRIPTION

[0043] The following is combined with Figure 1-9 This application is described in further detail. Example

[0044] The present application embodiment discloses a temperature overload protection device for a photovoltaic power generation combiner box. Figure 1-3 The temperature overload protection device includes a protection unit 1, a confluence unit 2 and a thermal sensing unit 3. The confluence unit 2 and the thermal sensing unit 3 are both installed on the inner wall of the protection unit 1, and the input end and the output end of the confluence unit 2 are used to be electrically connected to the photovoltaic module and the inverter.

[0045] At the same time, in order to continuously cool the temperature inside the protection unit 1 , a cooling unit 5 is provided inside the protection unit 1 , and a heat exchange unit 4 connected to the cooling unit 5 is provided outside the protection unit 1 .

[0046] When in use, the current between the photovoltaic module and the inverter is conducted through the bus unit 2, so as to realize the transmission and use of electric energy after the solar energy is converted into electric energy, and the thermal sensing unit 3 can detect the temperature inside the protection unit 1 in real time when the bus unit 2 is transmitting current, so as to be able to perform circuit breaking protection on the bus unit 2 when the operating temperature of the bus unit 2 is too high. In addition, through the coordinated use of the cooling unit 5 and the heat exchange unit 4, the interior of the protection unit 1 can be continuously heat exchanged, and the situation where the internal temperature of the protection unit 1 is continuously too high can be reduced, so that the thermal sensing unit 3 inside the protection unit 1 can be effectively protected, thereby achieving the purpose of improving the monitoring progress of the thermal sensing unit 3.

[0047] Reference Figure 1 In this embodiment, the protection unit 1 includes a protection member 11 and a mounting member 12. The protection member 11 is integrally covered on the outside of the confluence unit 2 and the thermal sensing unit 3, and a plurality of through holes are provided on the two side walls of the protection member 11 corresponding to the heat exchanger. The mounting member 12 is installed on the side wall of the protection member 11, so that the photovoltaic power generation confluence box of the present application can be stably installed on the corresponding supporting part through the mounting member 12.

[0048] In addition, the heat exchange units 4 are symmetrically installed on the two outer walls of the protective member 11, and cooling units 5 are arranged on the upper and lower sides inside the protective member 11, wherein the two heat exchange units 4 penetrate into the interior of the protective member 11 and are connected to the two cooling units 5 at the same time.

[0049] Reference Figure 1 In this embodiment, the confluence unit 2 includes a circuit breaker 21, a monitoring component 22, and a transmission component 23. The circuit breaker 21, the monitoring component 22, and the transmission component 23 are all mounted on the inner wall of the protection component 11, and the three are electrically connected. At the same time, the input end and the output end of the transmission component 23 are electrically connected to the external photovoltaic module and the inverter respectively.

[0050] When in use, the transmission component 23 can be used to conduct current between the photovoltaic module and the inverter, and the circuit breaker 21 can be used to control the on and off of the current in the transmission component 23 of the photovoltaic power generation junction box, so as to perform maintenance and overheating protection when necessary. At the same time, the monitoring component 22 can be used to monitor and manage the operating status of the photovoltaic power generation junction box in real time. In addition, the electrical cooperation between the monitoring component 22 and the thermal sensing unit 3 can realize real-time monitoring and management of the temperature in the protective component 11, so that the circuit breaker 21 can realize overheating protection of the photovoltaic power generation junction box under the electrical control of the monitoring component 22.

[0051] Reference Figure 1 In this embodiment, the thermal sensing unit 3 includes a temperature control unit 31. There are two groups of temperature control units 31, which are respectively installed on both sides of the inside of the protective member 11. At the same time, a plurality of temperature control units 31 are evenly arranged in each group. In addition, the plurality of temperature control units 31 in each group are electrically connected to the monitoring member 22. In this embodiment, the temperature control unit 31 can be selected as a temperature sensor 511f.

[0052] When in use, multiple temperature control components 31 can monitor the temperature inside the protective component 11 in real time. When the temperature inside the protective component 11 exceeds the preset temperature of the temperature control component 31, the temperature control component 31 will transmit an electrical signal to the monitoring component 22, so that the monitoring component 22 can transmit the electrical signal to the circuit breaker 21, thereby realizing circuit breaker protection for the photovoltaic power generation junction box.

[0053] Reference Figure 1-3In this embodiment, the cooling unit 5 includes a first guide member 51, a second guide member 52 and a convection member 53. The first guide member 51 and the second guide member 52 are respectively installed on the upper and lower sides of the protective member 11, and the two ends of the first guide member 51 and the second guide member 52 are respectively connected to the two heat exchange units 4 outside the protective member 11. At the same time, the convection member 53 is provided on the outer surfaces of the first guide member 51 and the second guide member 52.

[0054] In addition, in this embodiment, the first guide member 51 and the second guide member 52 are both composed of three cooling pipes 511. In this embodiment, the convection member 53 can be a fan, and the convection member 53 on the first guide member 51 and the convection member 53 on the second guide member 52 have opposite blowing directions.

[0055] Reference Figure 1-3 In this embodiment, the heat exchange unit 4 includes a storage member 41 and a guide member 42. The storage member 41 is installed on the outer wall of the protective member 11 and a filling port is provided on the side wall of the storage member 41. The guide member 42 is installed on the side wall of the storage member 41. In this embodiment, the guide member 42 can be an electric pump, and the input end of the guide member 42 is connected to the storage member 41, and the output end is connected to the first guide member 51 or the second guide member 52.

[0056] When in use, the coolant inside the storage member 41 can be pumped into the first guide member 51 or the second guide member 52 through the guide member 42, so that the coolant can effectively reduce the temperature inside the protective member 11 by circulating between the first guide member 51, the second guide member 52 and the storage member 41, thereby cooling the external environment of the confluence unit 2 inside the protective member 11, which is beneficial to reduce the situation where the temperature control unit 31 inside the protective member 11 is continuously exposed to a high temperature environment, resulting in a decrease in monitoring accuracy.

[0057] Reference Figure 2 and 4 -5, in order to better enhance the cooling effect on the inside of the protective member 11, in this embodiment, the cooling unit 5 also includes an extension member 54, a heat sink 55 and an auxiliary member 56. Among them, the extension member 54 is sleeved on the outer wall of the multiple cooling tubes 511 in the first guide member 51 and the second guide member 52. At the same time, a plurality of heat sinks 55 are evenly arranged, and the plurality of heat sinks 55 are respectively on the outer walls of the multiple cooling tubes 511 in the first guide member 51 and the second guide member 52. In addition, the auxiliary member 56 is installed on the outer walls of the multiple cooling tubes 511 in the first guide member 51 and the second guide member 52 and is located as a whole at one end of the extension member 54. In this embodiment, the heat sink 55 can be selected as a metal heat sink.

[0058] In this embodiment, the extension member 54 includes a first outer tube 541 and a second outer tube 542. Among them, a limiting member 58 is set at the outer end of two rows of heat sinks 55 on the outer wall of the cooling tube 511. In this embodiment, the limiting member 58 includes a guide rail 581, and the first outer tube 541 is slidably connected to the outer wall of the cooling tube 511 and is slidably connected to the guide rail 581 through a guide block 582 on the inner wall of the first outer tube 541. At the same time, in order to facilitate the reset of the first outer tube 541, a return member 59 is set in the guide rail 581. In this embodiment, the return member 59 can be selected as a reset spring, and one end of the reset spring is connected to the side wall of the slider, and the other end is connected to the side wall of the guide rail 581. In addition, the second outer tube 542 is fixedly sleeved on the outer wall of the cooling tube 511, and is located as a whole at a position where the auxiliary member 56 is close to the first outer tube 541. In addition, one end of the first outer tube 541 and one end of the second outer tube 542 are plugged into each other, and a sealing rubber member is disposed in the plugging groove formed at the end of the first outer tube 541 .

[0059] Reference Figure 4-7 In order to facilitate the transportation of the coolant between the cooling tube 511 and the first outer tube 541, the cooling tube 511 is divided into a first inner tube 511a, a second inner tube 511b and a third inner tube 511c. One end of the first inner tube 511a is connected to the storage element 41, and the other end penetrates the inner wall of the second outer tube 542 and is configured in a bell-mouth shape. The second inner tube 511b is connected and arranged between the third inner tube 511c and the first inner tube 511a, and the second inner tube 511b is located inside the first outer tube 541 as a whole and slides with the guide block 582 on the inner wall of the first outer tube 541 through the guide rail 581. At the same time, the other end of the third inner tube 511c is connected to the storage element 41 on the other side, and the end of the third inner tube 511c that penetrates the inside of the first outer tube 541 is configured in a bell-mouth shape.

[0060] In addition, in order to facilitate the sealed connection between the third inner tube 511c and the first outer tube 541, a matching ring 511d is provided on the outer wall of the third inner tube 511c close to the second inner tube 511b, and a snap ring 511e is provided on the inner wall of the first outer tube 541 away from the first inner tube 511a. The longitudinal sections of the snap ring 511e and the matching ring 511d are both L-shaped, and the two can be slidably plugged and matched with each other. In addition, two inlet ports 511g are provided at the intersection of the tube walls of the third inner tube 511c and the second inner tube 511b, so as to facilitate the transportation of the coolant between the first outer tube 541 and the third inner tube 511c.

[0061] Reference Figure 4-7In order to facilitate the cooling liquid to be guided from the first inner tube 511a to the first outer tube 541 for subsequent transportation, the end of the second inner tube 511b close to the first inner tube 511a is set to be conical, and the diameter of the end of the second inner tube 511b close to the first inner tube 511a is smaller than the diameter of the second inner tube 511b.

[0062] In addition, refer to Figure 5 and 8 -9, first baffles 541a with arc-shaped cross-sections are rotatably provided on both sides of the first outer tube 541 near one end of the second outer tube 542, and the two first baffles 541a are respectively located on both sides of the outer wall of the second inner tube 511b. At the same time, a second baffle 541b is rotatably provided at one end of the second inner tube 511b near the first inner tube 511a. Among them, the bottom of the second baffle 541b and the two first baffles 541a are provided with adjustment rods 541c, and each adjustment rod 541c is rotatably connected to the side wall of the first outer tube 541 and extends to the outside of the first outer tube 541 and is provided with an adjustment block 541d.

[0063] In addition, refer to Figure 2 In order to facilitate the reset of the second baffle 541b and the two first baffles 541a, a tightening ring is provided on the outer wall of each adjusting rod 541c, and a torsion spring is provided between the tightening ring and the outer wall of the first inner tube 511a. At the same time, in order to facilitate the sealing of the two second baffles 541b after rotation, a rubber extension tube is provided at the end of the second inner tube 511b close to the second inner tube 511b, and a sealing rubber ring is provided on the inner wall of the first inner tube 511a, and the inner and outer walls of the first baffle 541a are respectively fitted with the rubber extension tube and the sealing rubber ring.

[0064] Reference Figure 3-5 8, in this embodiment, the auxiliary conveying member 56 includes a sleeve ring 561, a driven gear 562 and a driving gear 563. The sleeve ring 561 is rotatably sleeved on the outer wall of the first inner tube 511a, and a positioning rod 564 is installed on the outer wall of one side of the sleeve ring 561, and a windshield plate 565 corresponding to the height of the convection member 53 is installed at the end of the positioning rod 564, and the driven gear 562 is installed on the side wall of the sleeve ring 561. At the same time, a servo motor 566 is arranged on the outer wall of the first inner tube 511a, and the driving gear 563 is assembled on the output shaft of the servo motor 566.

[0065] In addition, in order to facilitate the adjustment of the placement angle of the second baffle 541b and the two first baffles 541a, a toggle block 567 is installed on the outer wall of the other side of the sleeve ring 561, wherein the longitudinal section of the toggle block 567 is L-shaped, and the end of the toggle block 567 away from the sleeve ring 561 is extended toward the direction close to the first outer tube 541. In addition, in this embodiment, the cooling unit 5 also includes a sensor 57. The sensor 57 is arranged on the side wall of the first outer tube 541 and is electrically connected to the servo motor 566. In this embodiment, the sensor 57 can be selected as a flow meter.

[0066] When in use, the flow rate of the coolant in the first outer tube 541 is monitored in real time through the induction element 57. When the induction element 57 senses that the flow rate of the coolant in the first outer tube 541 increases, the electric signal is transmitted to the servo motor 566, so that the servo motor 566 can be controlled to start and drive the sleeve ring 561, so that the toggle block 567 can synchronously toggle the second baffle plate 541b and the two first baffle plates 541a, and the second baffle plate 541b is flipped open while the two first baffle plates 541a are flipped and fit with the first sealing rubber ring and the second sealing rubber ring. At this time, the coolant in the first inner tube 511a is guided to the second inner tube 511b, and then transported to the third inner tube 511c along the second inner tube 511b;

[0067] In addition, since the wind shield 565 is driven by the sleeve ring 561 to rotate to the same height as the convection member 53, the convection member 53 will drive the first outer tube 541 to move in the opposite direction along the guide rail 581 under the action of the wind shield 565, thereby exposing the multiple heat dissipation members 55 on the outer wall of the second inner tube 511b, so as to further improve the heat exchange efficiency.

[0068] Reference Figure 1-3 In order to monitor the temperature of the cooling unit 5 in real time, a temperature sensor 511f is provided on the outer wall of the first inner tube 511a. The temperature sensor 511f is electrically connected to a controller provided outside the storage element 41.

[0069] When in use, the temperature of the outer wall of the first inner tube 511a can be monitored in real time by the temperature sensor 511f, and displayed in real time on the indication of the controller on the outer wall of the storage component 41, so as to change the output power of the guide component 42 according to the temperature indication of the controller, so as to flexibly change the flow rate of coolant delivered to the cooling unit 5, thereby achieving the purpose of improving the heat exchange efficiency of the cooling unit 5 inside the protective component 11.

[0070] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A temperature overload protection device for a photovoltaic power generation combiner box, characterized in that: include: A protection unit (1), a confluence unit (2) and a thermal sensing unit (3), wherein the confluence unit (2) and the thermal sensing unit (3) are both arranged inside the protection unit (1), and the thermal sensing unit (3) is electrically connected to the confluence unit (2); a heat exchange unit (4) is arranged outside the protection unit (1), the heat exchange unit (4) penetrates the inside of the protection unit (1), and the heat exchange unit (4) is connected to a cooling unit (5) arranged inside the protection unit (1); the cooling unit (5) is located around the confluence unit (2), so that the temperature around the confluence unit (2) is adjusted by the cooperation of the cooling unit (5) and the heat exchange unit (4); The protection unit (1) comprises: a protection member (11) and a mounting member (12); the protection member (11) is integrally covered on the outside of the confluence unit (2) and the thermal sensing unit (3); the mounting member (12) is arranged on a side wall of the protection member (11) to facilitate assembly and positioning of the protection member (11); The cooling unit (5) comprises: a first flow guide (51), a second flow guide (52) and a convection member (53); the first flow guide (51) and the second flow guide (52) are respectively arranged on both sides of the protective member (11) and located outside the confluence unit (2); the first flow guide (51) and the second flow guide (52) are both connected to the heat exchange unit (4); the convection member (53) is arranged on the side walls of the first flow guide (51) and the second flow guide (52) so as to increase the gas flow velocity outside the confluence unit (2) through the convection member (53); The heat exchange unit (4) comprises: a storage member (41) and a guide member (42); the storage member (41) is arranged outside the protective member (11) and is used to store the coolant; the guide member (42) is arranged in communication with the side wall of the storage member (41) and is in communication with the first guide member (51) and the second guide member (52); The cooling unit (5) further comprises: an extension member (54), a heat dissipation member (55) and an auxiliary member (56); the extension member (54) is movably arranged on the side walls of the first guide member (51) and the second guide member (52) and connected to the convection member (53); the heat dissipation member (55) is arranged on the side walls of the first guide member (51) and the second guide member (52) and is located on the inner side of the extension member (54); the auxiliary member (56) is movably arranged on the side walls of the first guide member (51) and the second guide member (52) and can correspond to the position of the convection member (53), so that the overall position of the convection member (53) and the extension member (54) can be adjusted by the auxiliary member (56), so that the contact surface between the airflow in the protective member (11) and the first guide member (51) and the second guide member (52) can be better improved by the heat dissipation member (55); The cooling unit (5) further comprises: a sensing member (57), wherein the sensing member (57) is arranged on the side wall of the extension member (54) and is capable of monitoring the flow rate of the liquid inside the extension member (54), and the sensing member (57) is electrically connected to the auxiliary member (56) so that the position of the auxiliary member (56) on the side wall of the first guide member (51) or the second guide member (52) can be adjusted by the sensing member (57).

2. A temperature overload protection device for a photovoltaic power generation combiner box according to claim 1, characterized in that: The confluence unit (2) comprises: a circuit breaker (21), a monitoring component (22) and a transmission component (23); the circuit breaker (21), the monitoring component (22) and the transmission component (23) are all arranged on the inner wall of the protection component (11); the circuit breaker (21), the monitoring component (22) and the transmission component (23) are all electrically connected; the transmission component (23) is used to be electrically connected to a photovoltaic module and an inverter; the monitoring component (22) is electrically connected to the thermal sensing unit (3) so as to realize control of the circuit breaker (21) by the monitoring component (22) through the sensing of temperature changes by the thermal sensing unit (3).

3. A temperature overload protection device for a photovoltaic power generation combiner box according to claim 2, characterized in that; The thermal sensing unit (3) comprises: a temperature control unit (31), at least two of which are provided, the two temperature control units (31) being respectively located on inner walls on opposite sides of the protective component (11), and the two temperature control units (31) being electrically connected to the monitoring component (22).

4. A temperature overload protection device for a photovoltaic power generation combiner box according to claim 1, characterized in that: The cooling unit (5) further comprises: a limiting member (58), wherein the limiting member (58) is arranged on the outside of the heat dissipation member (55) and is connected to the extension member (54).

5. A temperature overload protection device for a photovoltaic power generation combiner box according to claim 4, characterized in that: The cooling unit (5) further comprises a return member (59), wherein the return member (59) is arranged on a side wall of the position-limiting member (58) and is respectively connected to the position-limiting member (58) and the auxiliary member (56).

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