A thermal management monitoring device for a distributed photovoltaic power station

Abstract

The utility model relates to a kind of heat management monitoring devices of distributed photovoltaic power station, including frame body and multiple respectively fixed mounting in frame body's confluence box, the inside of multiple confluence boxes is all provided with infrared thermometer, and protective box is fixedly arranged on frame body, intermittent monitoring mechanism is provided in protective box, intermittent monitoring mechanism is respectively matched with multiple infrared thermometer, when intermittent monitoring mechanism operates, multiple infrared thermometer will be sequentially opened for a period of time and then closed, so that multiple confluence boxes are carried out a round of temperature monitoring with certain length of time, the utility model, by setting infrared thermometer in multiple confluence boxes, and sequentially controlled by intermittent monitoring mechanism, accurate, ordered temperature measurement to confluence box is realized, abnormal high temperature situation caused by current confluence and other factors is discovered in time, compared with traditional continuous temperature measurement mode, intermittent temperature measurement can reduce energy consumption, reduce equipment cost and operation and maintenance cost, improve the economy of entire photovoltaic power station.

Description

Technical Field

[0001] This utility model relates to the field of thermal monitoring technology, specifically a thermal management and monitoring device for a distributed photovoltaic power station. Background Technology

[0002] With the increasing global demand for clean energy, photovoltaic (PV) power plants, as an important renewable energy generation method, have been widely adopted. Distributed PV power plants, due to their high flexibility, convenient installation, and ability to generate electricity locally, have been extensively built in urban and rural areas. However, PV power plants face many challenges during operation, among which thermal management is particularly critical.

[0003] In distributed photovoltaic (PV) power plants, combiner boxes are crucial devices that combine the output currents of multiple PV strings, providing a stable DC input to the inverter. However, combiner boxes generate heat during operation, especially under conditions of high current or high ambient temperature. Heat accumulation can cause the internal temperature of the combiner box to rise, affecting the equipment's performance and lifespan. High temperatures can damage internal electronic components and even cause fires or other safety accidents, severely impacting the normal operation of the PV power plant.

[0004] Currently, although there are some thermal management monitoring devices for photovoltaic power plants on the market, most of these devices have some shortcomings. For example, some devices use continuous temperature measurement, which can monitor the temperature in real time, but this method consumes a lot of energy, and continuous temperature measurement is not very necessary when the equipment is running normally, resulting in waste of resources. Utility Model Content

[0005] The purpose of this invention is to provide a thermal management and monitoring device for distributed photovoltaic power plants to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A thermal management monitoring device for a distributed photovoltaic power station includes a frame and multiple combiner boxes respectively fixedly installed on the frame. The combiner boxes combine the output currents of multiple photovoltaic strings to provide a stable DC input for the inverter, and each of the multiple combiner boxes is equipped with an infrared thermometer.

[0008] A protective box is fixedly installed on the frame, and an intermittent monitoring mechanism is installed inside the protective box. The intermittent monitoring mechanism is in conjunction with multiple infrared thermometers. When the intermittent monitoring mechanism is running, the multiple infrared thermometers will turn on in sequence for a period of time and then turn off, so that the multiple junction boxes are subjected to a round of temperature monitoring for a certain period of time.

[0009] As a further embodiment of this utility model:

[0010] The intermittent monitoring mechanism includes a reciprocating lead screw and a rotating rod, both of which are horizontally rotatable inside the protective box;

[0011] A micro motor is fixedly installed on the protective box, and the output end of the micro motor is coaxially and fixedly connected to one end of the reciprocating lead screw.

[0012] As a further improvement of this utility model:

[0013] The outer wall of the reciprocating lead screw is slidably fitted with a sleeve along its length, and the outer wall of the rotating rod is slidably fitted with a collar along its length. The sleeve and the collar are fixedly connected by a movable plate.

[0014] As a further improvement of this utility model:

[0015] The outer wall of the rotating rod is provided with a plurality of straight grooves along its length direction. The plurality of straight grooves are evenly spaced along the length direction of the rotating rod, and the plurality of straight grooves are distributed at equal angles along the circumference of the rotating rod.

[0016] The outer wall of the rotating rod is provided with multiple spiral grooves along its length, and two adjacent straight grooves are connected by the spiral grooves.

[0017] As a further improvement of this utility model:

[0018] The inner wall of the collar is fitted with rolling balls, which are also fitted into the straight groove.

[0019] When the reciprocating screw rotates, the sleeve will drive the collar to slide on the outer wall of the rotating rod through the moving plate. When the ball in the collar slides in the straight groove, the rotating rod will remain stationary. When the ball slides from the straight groove into the spiral groove and then into the next straight groove, the rotating rod will rotate at a certain angle.

[0020] As a further improvement of this utility model:

[0021] One end of the rotating rod is coaxially fixed with a bevel gear, and a rotating shaft is vertically rotatably installed inside the protective box;

[0022] One end of the rotating shaft is coaxially fixed with a second bevel gear that meshes with the first bevel gear.

[0023] As a further improvement of this utility model:

[0024] A wireless controller is fixedly installed on the protective box, and a disc is fixedly installed coaxially at the other end of the rotating shaft. Multiple arc-shaped contact switches corresponding to multiple infrared thermometers are fixedly installed on the wireless controller along the circumference of the disc.

[0025] A spherical block is fixedly provided on the circumferential surface of the disk. When the disk rotates, the spherical block can turn on multiple arc-shaped contact switches.

[0026] The number of the plurality of spiral grooves is equal to the number of the plurality of arc-shaped contact switches.

[0027] Compared with the prior art, the beneficial effects of this utility model are:

[0028] By installing infrared thermometers in multiple combiner boxes and sequentially controlling them through an intermittent monitoring mechanism, accurate and orderly temperature measurement of the combiner boxes is achieved. This temperature measurement method can not only effectively monitor temperature changes in the combiner boxes during operation and promptly detect abnormal high temperatures caused by factors such as current convergence, thus providing early warnings and taking corresponding measures to prevent equipment damage due to overheating, extend equipment lifespan, and improve the operational stability and reliability of photovoltaic power plants; but also, compared with traditional continuous temperature measurement methods, intermittent temperature measurement can reduce energy consumption, reduce equipment costs and operation and maintenance costs, and improve the overall economic efficiency of photovoltaic power plants. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of an embodiment of a thermal management and monitoring device for a distributed photovoltaic power station.

[0030] Figure 2 This is a schematic diagram of a combiner box and an infrared thermometer in one embodiment of a thermal management monitoring device for a distributed photovoltaic power station.

[0031] Figure 3 This is a cross-sectional view of the protective box, collar, and movable plate in one embodiment of the thermal management monitoring device for a distributed photovoltaic power station.

[0032] Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0033] Figure 5 This is a front perspective view of the rotating rod and collar after disassembly in one embodiment of the thermal management monitoring device for a distributed photovoltaic power station.

[0034] Figure 6 This is a cross-sectional view of the protective box in one embodiment of the thermal management monitoring device for a distributed photovoltaic power station.

[0035] Figure 7 for Figure 6 Enlarged view of section B in the middle.

[0036] In the diagram: 1. Frame; 2. Combiner box; 3. Infrared thermometer; 4. Protective box; 5. Reciprocating screw; 6. Rotating rod; 601. Straight groove; 602. Spiral groove; 7. Micro motor; 8. Sleeve; 9. Collar; 10. Moving plate; 11. Ball bearing; 12. First bevel gear; 13. Rotating shaft; 14. Wireless controller; 15. Second bevel gear; 16. Disc; 17. Arc-shaped contact switch; 18. Spherical block. Detailed Implementation

[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0038] Furthermore, the elements in this invention are referred to as being "fixed to" or "set on" another element, which may be directly on the other element or may also include an intervening element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or may also include an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0039] Please see Figures 1-7 In this embodiment of the utility model, a thermal management monitoring device for a distributed photovoltaic power station includes a frame 1 and multiple combiner boxes 2 respectively fixedly installed on the frame 1. The combiner boxes 2 combine the output current of multiple photovoltaic strings to provide a stable DC input for the inverter, and each of the multiple combiner boxes 2 is equipped with an infrared thermometer 3.

[0040] A protective box 4 is fixedly installed on the frame 1. An intermittent monitoring mechanism is installed inside the protective box 4. The intermittent monitoring mechanism is in cooperation with multiple infrared thermometers 3. When the intermittent monitoring mechanism is running, the multiple infrared thermometers 3 will turn on in sequence for a period of time and then turn off, so that the multiple junction boxes 2 are subjected to a round of temperature monitoring for a certain period of time.

[0041] In this scheme, the intermittent monitoring mechanism inside the protective box 4 is the only control center. It forms a one-to-many master-slave relationship with all the infrared thermometers 3 in the junction boxes 2, but does not drive all the infrared thermometers 3 at the same time. Instead, it schedules them uniformly. The monitoring mechanism sends out trigger signals in a predetermined order: each time, only one infrared thermometer 3 is activated, so that it completes the acquisition of the internal temperature of the junction box 2 within the set opening time. After the timer ends, the infrared thermometer 3 is immediately turned off and switched to the next one. Through the rhythm of sequential opening, timed operation and immediate shutdown, timed scanning of all thermometers is achieved. When the last infrared thermometer 3 completes the temperature measurement and is turned off, a complete round of temperature monitoring ends.

[0042] As a further embodiment of this utility model, the intermittent monitoring mechanism includes a reciprocating lead screw 5 and a rotating rod 6, both of which are horizontally rotatable inside the protective box 4;

[0043] A micro motor 7 is fixedly installed on the protective box 4, and the output end of the micro motor 7 is coaxially and fixedly connected to one end of the reciprocating lead screw 5.

[0044] The outer wall of the reciprocating lead screw 5 is slidably fitted with a sleeve 8 along its length direction, and the outer wall of the rotating rod 6 is slidably fitted with a collar 9 along its length direction. The sleeve 8 and the collar 9 are fixedly connected by a moving plate 10.

[0045] The outer wall of the rotating rod 6 is provided with a plurality of straight grooves 601 along its length direction. The plurality of straight grooves 601 are evenly spaced along the length direction of the rotating rod 6, and the plurality of straight grooves 601 are distributed at equal angles along the circumference of the rotating rod 6.

[0046] The outer wall of the rotating rod 6 is provided with a plurality of spiral grooves 602 along its length direction, and two adjacent straight grooves 601 are connected by the spiral grooves 602.

[0047] The inner wall of the collar 9 is fitted with rolling balls 11, which are also fitted into the straight groove 601.

[0048] When the reciprocating screw 5 rotates, the sleeve 8 will drive the collar 9 to slide on the outer wall of the rotating rod 6 through the moving plate 10. When the ball 11 in the collar 9 slides in the straight groove 601, the rotating rod 6 will remain stationary. When the ball 11 slides from the straight groove 601 into the spiral groove 602 and then into the next straight groove 601, the rotating rod 6 will rotate at a certain angle.

[0049] In this embodiment, the micro motor 7 drives the reciprocating screw 5 to rotate uniformly in one direction; since the sleeve 8 is restricted by the thread of the reciprocating screw 5, it can only translate along the axial direction, and the translational motion is transmitted to the collar 9 without change through the moving plate 10, so that the collar 9 slides synchronously in a straight line on the outer wall of the rotating rod 6.

[0050] When the ball 11 inside the collar 9 is located in a straight groove 601, the straight groove 601 is parallel to the axis of the rotating rod 6. The ball 11 can only slide axially in the groove and cannot generate a circumferential torque on the rotating rod 6. Therefore, the rotating rod 6 remains stationary, which corresponds to the "off" or "waiting" state of the infrared thermometer 3.

[0051] The collar 9 continues to move to the end of the straight groove 601, and the ball 11 enters the spiral groove 602 that is connected to it; the helix angle of the spiral groove 602 forces the ball 11 to generate a circumferential component force while it moves axially.

[0052] The circumferential force acts on the rotating rod 6 through the ball 11, causing it to rotate against static friction; the rotation angle is uniquely determined by the pitch of the spiral groove 602 and the circumferential distribution angle of the straight groove 601; when the ball 11 slides out of the spiral groove 602 and enters the next straight groove 601, the rotating rod 6 is locked again, completing one "step" - corresponding to the infrared thermometer 3 being switched once;

[0053] The reciprocating screw 5 rotates continuously, and the above steps are repeated cyclically. The rotating rod 6 rotates intermittently and at fixed angles, realizing the sequential triggering function of the monitoring mechanism.

[0054] As a further embodiment of this utility model, a first bevel gear 12 is coaxially fixed at one end of the rotating rod 6, and a rotating shaft 13 is vertically rotatably arranged inside the protective box 4;

[0055] One end of the rotating shaft 13 is coaxially fixedly provided with a second bevel gear 15 that meshes with the first bevel gear 12;

[0056] A wireless controller 14 is fixedly installed on the protective box 4. A disc 16 is fixedly installed coaxially at the other end of the rotating shaft 13. A plurality of arc-shaped contact switches 17 corresponding to the plurality of infrared thermometers 3 are fixedly installed on the wireless controller 14 along the circumferential direction of the disc 16.

[0057] A spherical block 18 is fixedly provided on the circumferential surface of the disk 16. When the disk 16 rotates, the spherical block 18 can turn on the multiple arc-shaped contact switches 17.

[0058] The number of the plurality of spiral grooves 602 is equal to the number of the plurality of arc-shaped contact switches 17.

[0059] In this embodiment, driven by the intermittent monitoring mechanism, the rotating rod 6 rotates by a fixed angle after each movement of the ball 11 through the straight groove 601, the spiral groove 602, and the lower straight groove 601. This angle is determined by the lead of the spiral groove 602 and the circumferential distribution of the straight groove 601.

[0060] The rotation of the rotating rod 6 is transmitted through the 90-degree meshing of the first bevel gear 12 and the second bevel gear 15, so that the vertically arranged rotating shaft 13 rotates synchronously; the speed ratio is 1:1, so the rotating shaft 13 also rotates intermittently with the same step angle.

[0061] The rotating shaft 13 drives the disc 16 at its end to rotate in steps. Only one spherical block 18 is provided on the circumference of the disc 16. It moves step by step with the disc 16 and approaches each arc-shaped contact switch 17 in sequence along the circumference.

[0062] The number of arc-shaped contact switches 17 evenly arranged along the circumference on the wireless controller 14 is equal to the number of spiral grooves 602 (i.e., the number of steps). With each step, the disk 16 rotates to the position of the next arc-shaped contact switch 17, and the spherical block 18 presses the corresponding arc-shaped contact switch 17. The wireless controller 14 then sends a "start-measure temperature-off" command to the infrared thermometer 3 corresponding to the arc-shaped contact switch 17, completing one sequential scan.

[0063] When all the arc-shaped contact switches 17 are triggered in sequence, the disc 16 completes a full rotation, and the system enters the next cycle, realizing intermittent and sequential control of all infrared thermometers 3.

[0064] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0065] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A thermal management and monitoring device for a distributed photovoltaic power station, comprising a frame (1) and a plurality of combiner boxes (2) respectively fixedly installed on the frame (1), characterized in that, The combiner box (2) combines the output current of multiple photovoltaic strings to provide a stable DC input for the inverter, and each of the multiple combiner boxes (2) is equipped with an infrared thermometer (3). A protective box (4) is fixedly installed on the frame (1). An intermittent monitoring mechanism is installed inside the protective box (4). The intermittent monitoring mechanism is in cooperation with multiple infrared thermometers (3). When the intermittent monitoring mechanism is running, the multiple infrared thermometers (3) will turn on in sequence for a period of time and then turn off, so that the multiple junction boxes (2) are subjected to a round of temperature monitoring for a certain duration.

2. The thermal management and monitoring device for a distributed photovoltaic power station according to claim 1, characterized in that, The intermittent monitoring mechanism includes a reciprocating screw (5) and a rotating rod (6), both of which are horizontally rotatable inside the protective box (4); A micro motor (7) is fixedly installed on the protective box (4), and the output end of the micro motor (7) is coaxially and fixedly connected to one end of the reciprocating screw (5).

3. The thermal management and monitoring device for a distributed photovoltaic power station according to claim 2, characterized in that, The outer wall of the reciprocating screw (5) is slidably fitted with a sleeve (8) along its length direction, and the outer wall of the rotating rod (6) is slidably fitted with a collar (9) along its length direction. The sleeve (8) and the collar (9) are fixedly connected by a moving plate (10).

4. The thermal management and monitoring device for a distributed photovoltaic power station according to claim 3, characterized in that, The outer wall of the rotating rod (6) is provided with a plurality of straight grooves (601) along its length direction. The plurality of straight grooves (601) are evenly spaced along the length direction of the rotating rod (6), and the plurality of straight grooves (601) are distributed at equal angles along the circumference of the rotating rod (6). The outer wall of the rotating rod (6) is provided with a plurality of spiral grooves (602) along its length direction, and two adjacent straight grooves (601) are connected by the spiral grooves (602).

5. The thermal management and monitoring device for a distributed photovoltaic power station according to claim 4, characterized in that, The inner wall of the collar (9) is fitted with rolling balls (11), and the rolling balls (11) are also fitted into the straight groove (601). When the reciprocating screw (5) rotates, the sleeve (8) will drive the collar (9) to slide on the outer wall of the rotating rod (6) through the moving plate (10). When the ball (11) in the collar (9) slides in the straight groove (601), the rotating rod (6) will remain stationary. When the ball (11) slides from the straight groove (601) into the spiral groove (602) and then into the next straight groove (601), the rotating rod (6) will rotate at a certain angle.

6. The thermal management and monitoring device for a distributed photovoltaic power station according to claim 4, characterized in that, One end of the rotating rod (6) is coaxially fixed with a bevel gear (12), and a rotating shaft (13) is vertically rotatably installed inside the protective box (4). One end of the rotating shaft (13) is coaxially fixed with a second bevel gear (15) that meshes with the first bevel gear (12).

7. A thermal management and monitoring device for a distributed photovoltaic power station according to claim 6, characterized in that, A wireless controller (14) is fixedly installed on the protective box (4), and a disc (16) is fixedly installed on the other end of the rotating shaft (13) on the same axis. A plurality of arc-shaped contact switches (17) corresponding to the plurality of infrared thermometers (3) are fixedly installed on the wireless controller (14) along the circumferential direction of the disc (16). A spherical block (18) is fixedly provided on the circumferential surface of the disk (16). When the disk (16) rotates, the spherical block (18) can turn on the multiple arc-shaped contact switches (17). The number of the plurality of spiral grooves (602) is equal to the number of the plurality of arc-shaped contact switches (17).

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