High heat dissipation photovoltaic power generation inverter

Abstract

The utility model provides a high photovoltaic power generation inverter of heat dissipation relates to inverter heat dissipation technical field, including a set of support leg, a set of opposite side fixed mounting of support leg has installation shell, the inside of installation shell is provided with passive heat dissipation mechanism. In the utility model, through the mode that passive heat dissipation and active cooling are combined, the heat dissipation efficiency of inverter is improved significantly, in passive heat dissipation mechanism, heat conduction strip and heat gathering strip can quickly conduct the heat generated by inverter body to radiating fin, utilize the large area structure of radiating fin to expand the heat dissipation area, and the air flow is accelerated by the cooling fan, and the heat convection is strengthened to emit; Active cooling mechanism is driven by motor movable jet nozzle, and cooling air flow is accurately and comprehensively sprayed to inverter key heating area, and the limitation of fixed heat dissipation mode is made up, and the both synergies, effectively solve the problem of heat accumulation when inverter operation, guarantee its stable work in efficient interval.

Description

Technical Field

[0001] This utility model relates to the field of inverter heat dissipation technology, and in particular to a high-heat-dissipation photovoltaic power generation inverter. Background Technology

[0002] Driven by the global energy transition and the "dual carbon" goal, photovoltaic power generation, as one of the core forms of clean and renewable energy, has seen its installed capacity continue to grow rapidly. According to data from the International Energy Agency (IEA), the global newly installed photovoltaic capacity exceeded 300GW in 2023, and the cumulative installed capacity is expected to exceed 1.5TW by 2030. As photovoltaic power plants develop towards higher power and higher density (such as the popularization of 1500V systems and the increase in string inverter power to over 200kW), the inverter, as the "energy conversion hub" of the photovoltaic system, directly affects the power generation and lifespan of the overall power plant due to its operating efficiency and reliability. However, inverters generate a lot of heat when operating at high power, especially in large power plant scenarios such as deserts and Gobi deserts with high temperatures and high irradiance. Heat dissipation has become a key bottleneck restricting its performance.

[0003] The heat dissipation performance of an inverter is a core factor determining its conversion efficiency and lifespan. Existing inverter heat dissipation technologies are mainly divided into three categories: passive heat dissipation (heat sink fins + natural convection), active air cooling (forced convection by fan), and liquid cooling. Among them, small and medium power inverters (1-100kW) mostly adopt a combination of passive heat dissipation and air cooling, while high power inverters (above 100kW) are gradually shifting to liquid cooling technology. However, in practical applications, the heat dissipation system needs to be adapted to different environments (such as high temperature, high dust, and humidity) and operating conditions (such as power fluctuations and day-night temperature differences). Its design needs to balance multiple factors such as heat dissipation efficiency, cost, maintenance difficulty, and equipment size. Currently, the industry's requirements for inverter power density are continuously increasing (such as power per unit volume increasing from 20kW / m³ to over 50kW / m³), and traditional heat dissipation structures are facing the dual challenges of "heat concentration and space compaction".

[0004] The shortcomings of existing technology; 1) Insufficient heat dissipation efficiency and adaptability: Traditional passive heat dissipation relies on natural convection, which reduces heat dissipation capacity in high-temperature environments, easily causing inverters to operate under derating due to overheating; in air-cooled solutions, fixed fan installations can easily create heat dissipation blind spots, and airflow can easily carry dust to block the gaps between fins, resulting in a significant decrease in heat dissipation efficiency after long-term use.

[0005] 2) Lack of structural synergy and reliability: The heat conduction path of the existing heat dissipation system is isolated from the inverter body and auxiliary components (such as drive motor). For example, the air-cooled motor itself has insufficient heat dissipation and is prone to failure. Moreover, the heat dissipation components (such as fans and pipes) lack protective design and are easily corroded in windy, sandy and high-humidity environments, which leads to increased maintenance costs.

[0006] 3) Lack of intelligent and dynamic adjustment: Traditional heat dissipation solutions mostly operate at a fixed power (such as a fan rotating at a constant speed), which cannot dynamically adjust the heat dissipation intensity according to the real-time power and temperature of the inverter, resulting in energy waste (such as the fan consuming energy ineffectively at low power), and it is also difficult to cope with the sudden high heat shock brought by instantaneous power peaks. Utility Model Content

[0007] The purpose of this invention is to address the problems in the existing technology, such as insufficient heat dissipation efficiency and environmental adaptability, poor coordination between the heat dissipation system and the overall structure of the equipment, lack of dynamic adjustment capability leading to energy waste, and difficulty in coping with sudden high thermal shocks. Therefore, this invention proposes a high-heat-dissipation photovoltaic inverter.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: a high-heat-dissipation photovoltaic inverter, comprising a set of support legs, a mounting shell fixedly installed on the side of the set of support legs, and a passive heat dissipation mechanism provided inside the mounting shell; the passive heat dissipation mechanism includes a mounting plate, a set of heat-conducting strips fixedly installed on the outer surface of the mounting plate, a heat-gathering strip fixedly connected to one end of the set of heat-conducting strips, a second mounting frame installed on the outer wall of the mounting shell, two third mounting frames installed on the outer surface of the second mounting frame, heat dissipation fins fixedly installed on the opposite side of the second mounting frame, and a cooling fan installed on the outer surface of each of the third mounting frames.

[0009] Preferably, an active cooling mechanism is fixedly installed on the outer wall of the support leg; the active cooling mechanism includes a motor, the output end of the motor is fixedly connected to a lead screw, a limiting rod is fixedly inserted into the side of the support leg, a ball bearing mounting platform is threadedly connected to the outer wall of the lead screw, a flow divider is fixedly installed on the outer surface of the ball bearing mounting platform, a set of air nozzles is fixedly connected to the outer surface of the flow divider, and an air inlet flange is fixedly connected to the outer wall of the flow divider.

[0010] Preferably, a set of heat sink plates are attached to the outer surface of the motor, the mounting part of the motor and the outer surface of the support leg are fixed with screws, a protective shell is fixedly installed on the outer surface of the support leg, and the motor and the heat sink plates are both located inside the protective shell.

[0011] Preferably, the outer wall of each set of heat sinks passes through the interior of the support leg and is fixedly connected to the heat conduction strip.

[0012] Preferably, a first mounting frame is fixedly mounted on the outer surface of the mounting shell, and an inspection door is hinged to the outer surface of the first mounting frame.

[0013] Preferably, the outer surface of the mounting shell is provided with a sliding groove, and the opposite side of the sliding groove is slidably attached to the outer wall of the heat sink.

[0014] Preferably, the outer wall of a set of heat-conducting strips and heat-gathering strips is attached to the inverter body, the mounting part of the inverter body and the outer surface of the mounting plate are fixedly installed, and the support legs of the mounting plate are fixedly installed inside.

[0015] Compared with the prior art, the advantages and positive effects of this utility model are as follows: 1. In this utility model, the heat dissipation efficiency of the inverter is significantly improved by combining passive heat dissipation and active cooling. In the passive heat dissipation mechanism, the heat conduction strip and heat gathering strip can quickly conduct the heat generated by the inverter body to the heat dissipation fins. The large area structure of the heat dissipation fins expands the heat dissipation area, while the cooling fan accelerates the airflow and enhances the convection dissipation of heat. The active cooling mechanism uses a motor to drive a movable air nozzle to accurately and comprehensively spray the cooling airflow to the key heat-generating areas of the inverter, making up for the limitations of fixed heat dissipation methods. The two work together to effectively solve the problem of heat accumulation during inverter operation and ensure its stable operation in the high-efficiency range.

[0016] 2. In this utility model, the structural design takes into account heat dissipation performance, equipment protection and maintenance convenience. The heat sink outside the motor not only dissipates heat for itself, but also introduces the waste heat into the heat conduction strip for secondary utilization, thereby improving energy utilization efficiency. The protective shell provides effective protection for the motor and heat sink, avoiding interference from the external environment. The design of the maintenance door and sliding groove facilitates the daily maintenance of the equipment and the sliding stability of the components. The overall structure enables the inverter to maintain good heat dissipation and operational reliability even in complex environments. Attached Figure Description

[0017] Figure 1 This is a perspective view of a high-heat-dissipation photovoltaic inverter proposed in this utility model; Figure 2 This is another perspective view of a high-heat-dissipation photovoltaic inverter proposed in this utility model; Figure 3 This is a three-dimensional, exploded view of the mechanical structure of a high-heat-dissipation photovoltaic inverter proposed in this utility model. Figure 4 This is a three-dimensional view of the internal structure of a high-heat-dissipation photovoltaic inverter proposed in this utility model. Figure 5 This is a three-dimensional view of the mechanical structure of a high-heat-dissipation photovoltaic inverter proposed in this utility model.

[0018] Legend: 1. Support leg; 11. Mounting shell; 12. Protective shell; 13. First mounting frame; 14. Inspection door; 15. Sliding groove; 2. Passive heat dissipation mechanism; 201. Mounting plate; 202. Heat-conducting strip; 203. Heat-gathering strip; 204. Second mounting frame; 205. Third mounting frame; 206. Heat dissipation fins; 207. Cooling fan; 3. Active cooling mechanism; 301. Motor; 302. Lead screw; 303. Limiting rod; 304. Ball bearing mounting platform; 305. Diverter plate; 306. Air nozzle; 307. Air inlet flange; 308. Heat dissipation plate; 4. Inverter body. Detailed Implementation

[0019] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0020] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0021] Example 1: Please refer to... Figures 1-5 As shown, this utility model provides a high heat dissipation photovoltaic power generation inverter, including a set of support legs 1, a mounting shell 11 fixedly installed on the opposite side of the set of support legs 1, and a passive heat dissipation mechanism 2 provided inside the mounting shell 11; the passive heat dissipation mechanism 2 includes a mounting plate 201, a set of heat-conducting strips 202 fixedly installed on the outer surface of the mounting plate 201, a heat-gathering strip 203 fixedly connected to one end of the set of heat-conducting strips 202, a second mounting frame 204 installed on the outer wall of the mounting shell 11, two third mounting frames 205 installed on the outer surface of the second mounting frame 204, heat dissipation fins 206 fixedly installed on the opposite side of the second mounting frame 204, and a cooling fan 207 installed on the outer surface of each third mounting frame 205.

[0022] The overall effect of Embodiment 1 is that the passive heat dissipation mechanism 2 achieves efficient heat dissipation of the inverter's basic structure. The mounting plate 201 serves as the supporting foundation, and the heat-conducting strips 202 on its outer surface can quickly conduct the heat generated by the inverter body 4 to the heat-gathering strips 203, achieving concentrated heat accumulation. The heat-gathering strips 203 transfer the heat to the heat dissipation fins 206 connected to the second mounting frame 204. The large-area structure of the fins dissipates heat to the outside through natural convection and thermal radiation. At the same time, the cooling fan 207 on the third mounting frame 205 forms a forced airflow, accelerating the airflow around the heat dissipation fins 206 and significantly improving the heat dissipation efficiency. This mechanism combines passive heat dissipation (heat dissipation fins) and active auxiliary heat dissipation (fans), effectively solving the basic heat dissipation needs of small and medium power inverters while ensuring a simple structure. It is suitable for scenarios with good ventilation.

[0023] Example 2: Please refer to... Figures 1-5 As shown, an active cooling mechanism 3 is fixedly installed on the outer wall of the support leg 1; the active cooling mechanism 3 includes a motor 301, a lead screw 302 is fixedly connected to the output end of the motor 301, a limit rod 303 is fixedly inserted into the opposite side of the support leg 1, a ball bearing mounting platform 304 is threadedly connected to the outer wall of the lead screw 302, a flow divider 305 is fixedly installed on the outer surface of the ball bearing mounting platform 304, a set of air nozzles 306 are fixedly connected to the outer surface of the flow divider 305, and an air inlet flange 307 is fixedly connected to the outer wall of the flow divider 305.

[0024] The overall effect of Embodiment 2 is that the active cooling mechanism 3 achieves dynamic and precise heat dissipation of the inverter. The motor 301 drives the lead screw 302 to rotate, causing the ball bearing mounting platform 304 to slide stably along the limit rod 303, which in turn drives the splitter plate 305 and the jet nozzles 306 to move back and forth. The external cooling airflow enters the splitter plate 305 through the air inlet flange 307 and is evenly sprayed onto the key heat-generating areas of the inverter (such as areas with dense power devices) through a set of jet nozzles 306. This design breaks through the limitations of fixed heat dissipation and achieves coverage of heat dissipation blind spots through the movable jet structure, enhancing the targeting and flexibility of heat dissipation. At the same time, the forced airflow can quickly remove the heat accumulated on the surface, forming a synergy with the passive heat dissipation mechanism 2 to further improve the overall heat dissipation capacity, which is especially suitable for operating conditions with large instantaneous power fluctuations.

[0025] Example 3: Please refer to... Figures 1-5As shown, a set of heat dissipation plates 308 are attached to the outer surface of the motor 301. The mounting part of the motor 301 and the outer surface of the support leg 1 are fixed with screws. A protective shell 12 is fixedly installed on the outer surface of the support leg 1. The motor 301 and the heat dissipation plates 308 are both located inside the protective shell 12. The outer walls of the set of heat dissipation plates 308 pass through the interior of the support leg 1 and are fixedly connected to the heat conduction strip 202. A first mounting frame 13 is fixedly installed on the outer surface of the mounting shell 11. An inspection door 14 is hinged to the outer surface of the first mounting frame 13. A sliding groove 15 is opened on the outer surface of the mounting shell 11. The opposite side of the sliding groove 15 slides against the outer wall of the heat dissipation plate 308. An inverter body 4 is attached to the outer wall of a set of heat conduction strips 202 and heat gathering strips 203. The mounting part of the inverter body 4 is fixedly installed on the outer surface of the mounting plate 201. The mounting plate 201 is fixedly installed inside the support leg 1.

[0026] The overall effect of embodiment 3 is that the reliability and practicality of the heat dissipation system are improved through structural optimization and detailed design. The heat dissipation plate 308 on the outer surface of the motor 301 dissipates heat for the motor itself, preventing it from overheating due to long-term operation. On the other hand, through the connection with the heat conduction strip 202, the residual heat of the motor is introduced into the passive heat dissipation mechanism 2 for unified dissipation, realizing the secondary utilization of heat. The protective shell 12 protects the motor 301 and the heat dissipation plate 308 from external dust and moisture corrosion. The maintenance door 14 connected to the first mounting frame 13 facilitates the maintenance of the internal components of the mounting shell 11. The sliding groove 15 ensures the sealing and stability of the heat dissipation plate 308 when sliding. The tight fit between the inverter body 4 and the heat conduction strip 202 and the heat gathering strip 203, as well as the fixation between the mounting plate 201 and the support leg 1, ensures that the heat conduction path is unobstructed and reduces thermal resistance loss. The overall design takes into account heat dissipation efficiency, equipment protection and maintenance convenience, so that the heat dissipation system can still operate stably in complex environments.

[0027] Usage and Working Principle: Installation and Fixing: Fix the device to a flat surface or bracket using the support legs 1, ensuring good ventilation of the mounting shell 11; check the fit between the inverter body 4 and the heat conduction strips 202 and 203 to ensure smooth heat conduction. Start-up and Operation: After power is connected, the passive cooling mechanism 2 automatically operates, and the cooling fan 207 starts, working in conjunction with the heat sink 206 for basic heat dissipation; the active cooling mechanism 3 can be activated based on the inverter's operating power or temperature sensor signal (requires an external control module), and the motor 301 drives the nozzle 306 to reciprocate, spraying cooling airflow. Maintenance and Inspection: Regularly check the status of internal components through the inspection door 14, and clean the dust from the heat sink 206 and fan; check the sealing of the protective shell 12 to ensure normal heat dissipation of the motor 301 and the heat sink 308. Working Principle The heat generated by the inverter body 4 during operation is transferred and dissipated through the following paths: Heat collection: Heat is first transferred to the heat-gathering strip 203 through the tightly fitted heat-conducting strip 202, realizing the concentration of dispersed heat. Passive heat dissipation: The heat-gathering strip 203 conducts heat to the heat dissipation fins 206, and the cooling fan 207 accelerates the airflow, dissipating the heat on the fins to the outside through forced convection. Active enhancement: The jet nozzle 306 of the active cooling mechanism 3 moves back and forth under the drive of the motor, and the jet cooling airflow directly acts on the high heat-generating area, supplementing the shortcomings of passive heat dissipation and forming a dual heat dissipation path of "conduction + convection". Collaborative protection: The residual heat of the motor is introduced into the heat-conducting strip 202 for secondary heat dissipation through the heat dissipation plate 308. The protective shell 12 and the maintenance door 14 ensure the stability of the equipment operating environment, and ultimately realize the efficient and reliable operation of the inverter in the low temperature range.

[0028] The wiring diagrams of the heat sink 206, cooling fan 207, motor 301, ball bearing mounting platform 304, and inverter body 4 in this utility model are common knowledge in the field. Their working principles are known technologies. The appropriate model is selected according to actual use. Therefore, the control methods and wiring layouts of the heat sink 206, cooling fan 207, motor 301, ball bearing mounting platform 304, and inverter body 4 will not be explained in detail.

[0029] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A high-heat-dissipation photovoltaic power generation inverter, characterized in that, It includes a set of support legs (1), and a mounting shell (11) is fixedly installed on the opposite side of the set of support legs (1). A passive heat dissipation mechanism (2) is provided inside the mounting shell (11). The passive heat dissipation mechanism (2) includes a mounting plate (201), on the outer surface of the mounting plate (201) a set of heat-conducting strips (202) are fixedly installed, and a heat-gathering strip (203) is fixedly connected to one end of the set of heat-conducting strips (202). A second mounting frame (204) is installed on the outer wall of the mounting shell (11). Two third mounting frames (205) are installed on the outer surface of the second mounting frame (204). Heat dissipation fins (206) are fixedly installed on the opposite side of the second mounting frame (204). A cooling fan (207) is installed on the outer surface of each third mounting frame (205).

2. The high-heat-dissipation photovoltaic power generation inverter according to claim 1, characterized in that: An active cooling mechanism (3) is fixedly installed on the outer wall of the support leg (1); The active cooling mechanism (3) includes a motor (301), the output end of which is fixedly connected to a lead screw (302), a limiting rod (303) is fixedly inserted into the opposite side of the support leg (1), a ball bearing mounting platform (304) is threadedly connected to the outer wall of the lead screw (302), a flow divider plate (305) is fixedly installed on the outer surface of the ball bearing mounting platform (304), a set of air nozzles (306) is fixedly connected to the outer surface of the flow divider plate (305), and an air inlet flange (307) is fixedly connected to the outer wall of the flow divider plate (305).

3. The high-heat-dissipation photovoltaic power generation inverter according to claim 2, characterized in that: A set of heat sinks (308) are attached to the outer surface of the motor (301). The mounting part of the motor (301) and the outer surface of the support leg (1) are fixed with screws. A protective shell (12) is fixedly installed on the outer surface of the support leg (1). The motor (301) and the heat sinks (308) are both located inside the protective shell (12).

4. The high-heat-dissipation photovoltaic power generation inverter according to claim 3, characterized in that: The outer wall of each heat sink (308) passes through the interior of the support leg (1) and is fixedly connected to the heat conduction strip (202).

5. The high-heat-dissipation photovoltaic power generation inverter according to claim 1, characterized in that: The outer surface of the mounting shell (11) is fixedly mounted with a first mounting frame (13), and the outer surface of the first mounting frame (13) is hinged to an inspection door (14).

6. The high-heat-dissipation photovoltaic power generation inverter according to claim 5, characterized in that: The outer surface of the mounting shell (11) is provided with a sliding groove (15), and the opposite side of the sliding groove (15) slides against the outer wall of the heat sink (308).

7. A high-heat-dissipation photovoltaic inverter according to claim 4, characterized in that: An inverter body (4) is attached to the outer wall of a set of heat-conducting strips (202) and heat-gathering strips (203). The mounting part of the inverter body (4) and the outer surface of the mounting plate (201) are fixedly installed. The support leg (1) of the mounting plate (201) is fixedly installed inside.

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