Heat dissipation structure of solar inverter

Abstract

The invention belongs to the technical field of solar inverters, particularly relates to a heat dissipation structure of a solar inverter, and aims to solve the problem that a large amount of dust is easy to accumulate in an internal heat dissipation structure of an existing photovoltaic inverter, and provides the following scheme that the heat dissipation structure comprises a main case, and a shell is fixed to the outer side of the main case through bolts; air inlet grid plates which are distributed in an array mode are fixed to one side of the shell, exhaust side grooves which are distributed in an array mode are formed in the two sides of the shell and the two sides of the mainframe box, and an inverter body is fixed to the bottom of the mainframe box. When cleaning is needed, a lifting screw rod lifts a lifting machine box to the top, along with rotation of a wind wheel, a cleaning brush is in a horizontal state due to centrifugal force, the cleaning brush is driven by an internal second driving motor to rotate, the side walls of fan blades at the circumferential position are cleaned, dust is discharged along with airflow, and the lifting machine box is driven to descend through rotation of the lifting screw rod; the fan blades are cleaned completely, and after cleaning is completed, the cleaning brush is stored in the brush storage groove.

Description

Technical Field

[0001] This invention relates to the field of solar inverter technology, and more particularly to a heat dissipation structure for a solar inverter. Background Technology

[0002] An inverter is a converter that transforms DC power, batteries, and storage batteries into AC power of fixed frequency and voltage or frequency and voltage regulation, typically 220V, 50Hz sine wave. It consists of an inverter bridge, control logic, and filter circuits. The most important function of a photovoltaic inverter is to convert the DC power generated by solar panels into AC power used by household appliances. All the power generated by solar panels must be processed by the inverter before it can be output.

[0003] For example, Chinese patent document CN208015599U discloses a heat dissipation device for a solar photovoltaic grid-connected inverter, including an inverter body. The inverter body contains a cooling fan, an inner plate, and a side plate. The ends of the inner and side plates form placement grooves, inductor boxes are installed in these grooves, and the outer surface of the inductor box has several heat dissipation fins. The inner plate has a first ventilation opening communicating with the interior of the inverter body, and the ends of the side plates have several second ventilation openings. The above-disclosed technology has the following problems: during the operation of the solar inverter, heat dissipation introduces external dust and other contaminants, which adhere to the fan blades and the inside of the inverter, resulting in low heat dissipation efficiency after prolonged use. The cooling fan cannot maintain efficient heat dissipation, and existing technologies do not easily solve this problem. Therefore, a heat dissipation structure for solar inverters is urgently needed to address these issues. Summary of the Invention

[0004] To address the technical problem that current photovoltaic inverter internal heat dissipation structures easily accumulate large amounts of dust, this invention proposes a heat dissipation structure for solar inverters.

[0005] This invention proposes a heat dissipation structure for a solar inverter, comprising a main chassis, an outer shell fixed to the outside of the main chassis by bolts, an array of air intake grilles fixed to one side of the outer shell, and arrays of exhaust side slots on both sides of the outer shell and the main chassis. An inverter body is fixed to the bottom of the main chassis, with the terminals and control terminals of the inverter body located at the bottom. A heat dissipation casing is fixed to the top of the main chassis by bolts. The air intake of the heat dissipation casing is located on one side and is connected to the air intake grille on the top of the outer shell. The exhaust of the heat dissipation casing is located at both ends and is connected to the exhaust side slots at both ends. A heat-conducting fin plate is provided at the bottom of the heat dissipation casing.

[0006] Preferably, the cross-section of the exhaust side channel is inclined downward, the top inner wall of the exhaust side channel is provided with a receiving groove, and an exhaust baffle is hingedly installed inside the receiving groove. A limit spring is fixed between the top of the exhaust baffle and the top inner wall of the receiving groove.

[0007] Preferably, both sides of the heat dissipation box are provided with an exhaust mechanism, the exhaust mechanism includes a heat dissipation box exhaust port opened on the side wall of the heat dissipation box, an exhaust connection frame is fixed around the exhaust port of the heat dissipation box, and a first limiting post is fixed at each of the four corners of the exhaust port of the heat dissipation box.

[0008] Preferably, the four first limiting posts are externally slidably fitted with the same exhaust sealing frame, and an exhaust cover is sealed between the exhaust sealing frame and the exhaust connecting frame. An exhaust sealing strip is fixed to the side wall of the exhaust sealing frame, and the exhaust sealing strip is pressed against the exhaust port of the heat sink to maintain a seal.

[0009] Preferably, the air intake position of the heat dissipation box is provided with four sliding sleeve slots, and a sliding cylinder is slidably fitted inside each of the four sliding sleeve slots. A second limiting post is fixed at the axial position of the inner wall of the four sliding sleeve slots. The second limiting post is slidably inserted and matched with the middle position of the sliding cylinder. A return spring is fixed inside the sliding sleeve slot and is fixed to the end of the sliding cylinder.

[0010] Preferably, one side of each of the four sliding cylinders is fixed with the same air intake sealing frame, an air intake sleeve is fixed between the air intake sealing frame and the side wall of the heat sink, an air intake sealing strip is fixed to the side wall of the air intake sealing frame, and the air intake sealing strip is pressed against the inner wall of the outer shell and kept sealed.

[0011] Preferably, the inner wall of the heat dissipation box is fixed with two fan boxes, one side of the fan box is provided with a fan box air inlet, and one end of the fan box is provided with a fan box exhaust port.

[0012] Preferably, a vertically arranged air intake filter element is fixed on one side of the fan casing. The air intake filter element is installed and fixed inside the air intake of the fan casing. A fan wheel is installed between the top and bottom of the fan casing via a bearing. Fan blades are fixed around the circumference of the fan wheel. The fan wheel is driven by a first drive motor installed inside the fan casing.

[0013] Preferably, the wind turbine has an inner groove in the middle and a side groove around its circumference. A vertically oriented brush storage groove is located at the bottom of the side groove. A horizontally oriented lifting housing is slidably mounted inside the inner groove. A circumferential slider is located around the circumference of the lifting housing and is slidably engaged with the side groove. A vertically oriented lifting screw is mounted in the middle of the inner groove via a bearing, and the lifting screw is threaded into the middle of the lifting housing.

[0014] Preferably, a rotating shaft is mounted on the middle position of the circumferential slider via a bearing, and a vertically arranged cleaning brush is mounted on one end of the rotating shaft via a universal joint. The rotating shaft is driven by a second drive motor located inside the lifting box.

[0015] The beneficial effects of this invention are as follows: When cleaning is required, the lifting screw raises the lifting box to the top. As the fan rotates, the cleaning brush is in a horizontal state due to centrifugal force. Driven by the internal second drive motor, the cleaning brush rotates to clean the side walls of the fan blades at the circumference. Dust is discharged with the airflow. The rotation of the lifting screw drives the lifting box to descend, and the fan blades are thoroughly cleaned. After cleaning, the cleaning brush is stored in the brush storage slot.

[0016] The heat dissipation structure of this solar inverter allows the exhaust wind to lift the exhaust baffle during heat dissipation, enabling smooth ventilation. The thrust of the wind during ventilation is greater than the elastic force of the limit spring. When heat dissipation is not in progress, the elastic force of the limit spring and the weight of the exhaust baffle itself seal the exhaust side groove, preventing insects from entering and effectively preventing dust and moisture.

[0017] The heat dissipation structure of this solar inverter compresses the air intake sealing frame and the exhaust sealing frame inward during the matching process of installing the casing. After installation, the air intake sealing frame and the exhaust sealing frame are sealed and pressed tightly against each side wall through the air intake sealing strip and the exhaust sealing strip, effectively ensuring the sealing of the heat dissipation air passage and preventing dust from entering the inside of the device. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of a solar inverter heat dissipation structure proposed in this invention; Figure 2 This is a schematic diagram of the internal structure of the main unit of a solar inverter heat dissipation structure proposed in this invention. Figure 3 This is a schematic diagram of the internal cross-sectional structure of the exhaust side groove of a solar inverter heat dissipation structure proposed in this invention; Figure 4This is a schematic diagram of the heat dissipation chassis structure of a solar inverter proposed in this invention; Figure 5 This is a partial structural diagram of the heat dissipation casing of a solar inverter heat dissipation structure proposed in this invention; Figure 6 This invention proposes a heat dissipation structure for a solar inverter. Figure 5 Enlarged schematic diagram of part A of the structure; Figure 7 This is a schematic diagram of the wind turbine structure of a solar inverter heat dissipation structure proposed in this invention; Figure 8 This is a partial cross-sectional view of the wind turbine structure of a solar inverter heat dissipation structure proposed in this invention; Figure 9 This is a schematic diagram of the cleaning disk structure of a solar inverter heat dissipation structure proposed in this invention.

[0019] In the diagram: 1. Outer casing; 2. Intake grille; 3. Exhaust side channel; 4. Main unit chassis; 5. Inverter body; 6. Cooling unit chassis; 7. Fan chassis; 8. Intake filter; 9. Intake sealing frame; 10. Intake sealing strip; 11. Exhaust sealing frame; 12. Exhaust cover; 13. Exhaust baffle; 14. Limit spring; 15. Exhaust connection frame; 16. First limit post; 17. Exhaust sealing strip; 18. Cooling unit chassis 19. Exhaust port; 20. Fan housing exhaust port; 21. Sliding cylinder; 22. Inlet sleeve; 23. Sliding cylinder sleeve groove; 24. Return spring; 25. Second limit post; 26. Fan housing air inlet; 27. Fan blade; 28. Brush storage groove; 29. ​​Fan wheel inner groove; 30. Lifting box; 31. Lifting screw; 32. Fan wheel side groove; 33. Circumferential slider; 34. Rotating shaft; 35. Cleaning brush. Detailed Implementation

[0020] Reference Figures 1-9 A heat dissipation structure for a solar inverter includes a main unit 4, an outer shell 1 fixed to the outside of the main unit 4 by bolts, an array of air intake grilles 2 fixed to one side of the outer shell 1, and arrays of exhaust side slots 3 on both sides of the outer shell 1 and the main unit 4. An inverter body 5 is fixed to the bottom of the main unit 4, and the terminals and control terminals of the inverter body 5 are located at the bottom. A heat dissipation casing 6 is fixed to the top of the main unit 4 by bolts. The air intake of the heat dissipation casing 6 is located on one side and is connected to the air intake grille 2 on the top of the outer shell 1. The exhaust of the heat dissipation casing 6 is located at both ends and is connected to the exhaust side slots 3 at both ends. A heat-conducting fin plate is provided at the bottom of the heat dissipation casing 6.

[0021] Furthermore, the cross-section of the exhaust side channel 3 is inclined downwards, and a storage groove is provided on the top inner wall of the exhaust side channel 3. An exhaust baffle 13 is hinged inside the storage groove. A limit spring 14 is fixed between the top of the exhaust baffle 13 and the top inner wall of the storage groove. The elastic force of the limit spring 14 is set to be less than the wind force during exhaust. When working, the exhaust baffle 13 is lifted to achieve exhaust. When stopping work, the exhaust baffle 13 is lowered and closed to prevent dust from entering the interior, effectively maintaining the internal cleanliness and sealing and ventilation effect.

[0022] Furthermore, both sides of the heat dissipation casing 6 are provided with exhaust mechanisms, including heat dissipation casing exhaust ports 18 opened on the side walls of the heat dissipation casing 6. Exhaust connection frames 15 are fixed around the heat dissipation casing exhaust ports 18, and first limiting posts 16 are fixed at the four corners of the heat dissipation casing exhaust ports 18. The same exhaust sealing frame 11 is slidably sleeved on the outside of the four first limiting posts 16. An exhaust cover 12 is sealed between the exhaust sealing frame 11 and the exhaust connection frame 15. An exhaust sealing strip 17 is fixed to the side wall of the exhaust sealing frame 11. The exhaust sealing strip 17 is pressed against the heat dissipation casing exhaust port 18 to maintain a seal. During installation, after the exhaust sealing frame 11 is released, the elasticity of the exhaust cover 12 will press the exhaust sealing strip 17 into contact with the side wall of the heat dissipation casing 6 to achieve a seal.

[0023] Furthermore, the air intake position of the heat dissipation casing 6 is provided with four sliding sleeve grooves 22, and a sliding cylinder 20 is slidably fitted inside each of the four sliding sleeve grooves 22. A second limiting post 24 is fixed at the axial position of the inner wall of the four sliding sleeve grooves 22. The second limiting post 24 is slidably inserted and matched with the middle position of the sliding cylinder 20. A return spring 23 is fixed inside the sliding sleeve groove 22. The return spring 23 is fixed to the end of the sliding cylinder 20. The same air intake sealing frame 9 is fixed on one side of the four sliding cylinders 20. An air intake rubber sleeve 21 is fixed between the air intake sealing frame 9 and the side wall of the heat dissipation casing 6. An air intake sealing strip 10 is fixed on the side wall of the air intake sealing frame 9. The air intake sealing strip 10 is pressed against the inner wall of the outer shell 1 and keeps sealed. When installing the outer shell 1, the air intake sealing frame 9 is pressed inward. After the outer shell 1 is installed, the return spring 23 presses the air intake sealing frame 9 into contact with the inner wall of the outer shell 1, and the air intake sealing strip 10 achieves sealing.

[0024] Furthermore, two fan housings 7 are fixed to the inner wall of the heat dissipation housing 6. A fan housing air inlet 25 is opened on one side of the fan housing 7, and a fan housing exhaust port 19 is opened at one end of the fan housing 7.

[0025] Furthermore, a vertically arranged air intake filter element 8 is fixed on one side of the fan housing 7. The air intake filter element 8 is installed and fixed inside the air intake port 25 of the fan housing. A fan wheel 26 is installed between the top and bottom of the fan housing 7 via bearings. A fan blade 27 is fixed on the circumference of the fan wheel 26. The fan wheel 26 is driven by a first drive motor, which is installed inside the fan housing 7.

[0026] Furthermore, an inner groove 29 is provided in the middle of the impeller 26, and a side groove 32 is provided on the circumference of the impeller 26. A vertically arranged brush storage groove 28 is provided at the bottom of the side groove 32. A horizontally arranged lifting box 30 is slidably installed inside the inner groove 29. A circumferential slider 33 is provided on the circumference of the lifting box 30. The circumferential slider 33 is slidably engaged with the side groove 32. A vertically arranged lifting screw 31 is installed in the middle of the inner groove 29 through a bearing. The lifting screw 31 is threadedly fitted into the middle of the lifting box 30.

[0027] Furthermore, a rotating shaft 34 is mounted on the middle position of the circumferential slider 33 via a bearing. One end of the rotating shaft 34 is mounted on a vertically arranged cleaning brush 35 via a universal joint. The rotating shaft 34 is driven by a second drive motor located inside the lifting box 30. When cleaning is required, the lifting screw 31 raises the lifting box 30 to the top. As the impeller 26 rotates, the cleaning brush 35 is in a horizontal state due to centrifugal force. Driven by the internal second drive motor, the cleaning brush 35 rotates to clean the side wall of the impeller 27 at the circumferential position.

[0028] In use, the main unit 4 is fixedly installed, the inverter body 5 operates the entire photovoltaic power generation, and the outer casing 1 is installed outside the main unit 4. During operation, heat dissipation is achieved through the internal structure of the heat dissipation casing 6. The internal heat enters the interior of the heat dissipation casing 6 through the heat-conducting fins and is discharged through the air duct. When the heat dissipation casing 6 is working, the fan wheel 26 inside the fan casing 7 rotates, and the fan blades 27 circulate the internal air. Air is intaked from one side of the heat dissipation casing 6 and exhausted from both ends, forming a heat-conducting airflow to dissipate the internal heat. During heat dissipation, the exhaust wind force lifts the exhaust baffle 13, enabling smooth exhaust. The thrust of the exhaust wind is greater than the elastic force of the limiting spring 14. When heat dissipation is not in progress, the elastic force of the limiting spring 14 and the weight of the exhaust baffle seal the exhaust side groove 3, preventing insects from entering and effectively preventing dust and moisture. When installing the outer casing 1 for matching, the intake sealing frame 9 is compressed inward, and the exhaust sealing frame 11 is compressed outward. Internal compression, after installation, the intake sealing frame 9 is sealed and pressed tightly against each side wall by the intake sealing strip 10, and the exhaust sealing frame 11 is sealed tightly by the exhaust sealing strip 17, effectively ensuring the sealing of the heat dissipation air passage and preventing dust from entering the device's interior; when the impeller 26 and fan blades 27 rotate for a long time to dissipate heat, dust will accumulate on the surface, and the internal dust removal structure will actively clean the dust. During normal heat dissipation, the cleaning brush 35 is located at the bottom and placed in the brush storage slot 28 to prevent the impeller 26 from being exposed to dust. When rotating, the dust is thrown out; when cleaning is needed, the lifting screw 31 raises the lifting box 30 to the top. As the impeller 26 rotates, the cleaning brush 35 is in a horizontal state due to centrifugal force. Driven by the internal second drive motor, the cleaning brush 35 rotates to clean the side wall of the fan blade 27 at the circumference. The dust is discharged with the airflow. The rotation of the lifting screw 31 drives the lifting box 30 to descend and clean the fan blade 27 completely. After cleaning, the cleaning brush 35 is stored in the brush storage slot 28.

[0029] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A heat dissipation structure for a solar inverter, comprising a main unit housing (4), wherein an outer shell (1) is bolted to the outside of the main unit housing (4), characterized in that, An array of air intake grilles (2) is fixed on one side of the outer casing (1). An array of exhaust side slots (3) are provided on both sides of the outer casing (1) and the main unit (4). An inverter body (5) is fixed at the bottom of the main unit (4). The terminals and control terminals of the inverter body (5) are located at the bottom. A heat dissipation box (6) is fixed to the top of the main unit (4) by bolts. The air intake position of the heat dissipation box (6) is located on one side and is connected to the air intake grille (2) at the top of the outer casing (1). The exhaust position of the heat dissipation box (6) is located at both ends and is connected to the exhaust side slots (3) at both ends respectively. A heat-conducting fin plate is provided at the bottom of the heat dissipation box (6).

2. The heat dissipation structure for a solar inverter according to claim 1, characterized in that, The cross-section of the exhaust side groove (3) is inclined downward. The top inner wall of the exhaust side groove (3) is provided with a storage groove, and an exhaust baffle (13) is hinged inside the storage groove. A limit spring (14) is fixed between the top of the exhaust baffle (13) and the top inner wall of the storage groove.

3. The heat dissipation structure for a solar inverter according to claim 1, characterized in that, Both sides of the heat dissipation box (6) are provided with exhaust mechanisms. The exhaust mechanism includes a heat dissipation box exhaust port (18) opened on the side wall of the heat dissipation box (6). An exhaust connection frame (15) is fixed around the heat dissipation box exhaust port (18), and a first limiting post (16) is fixed at each of the four corners of the heat dissipation box exhaust port (18).

4. The heat dissipation structure for a solar inverter according to claim 3, characterized in that, The four first limiting posts (16) are externally slidably fitted with the same exhaust sealing frame (11). An exhaust cover (12) is sealed between the exhaust sealing frame (11) and the exhaust connecting frame (15). An exhaust sealing strip (17) is fixed to the side wall of the exhaust sealing frame (11). The exhaust sealing strip (17) is pressed and sealed with the exhaust port (18) of the heat sink.

5. The heat dissipation structure for a solar inverter according to claim 1, characterized in that, The air intake of the heat dissipation box (6) is provided with four sliding sleeve grooves (22), and a sliding cylinder (20) is slidably fitted inside each of the four sliding sleeve grooves (22). A second limiting post (24) is fixed at the axial position of the inner wall of the four sliding sleeve grooves (22). The second limiting post (24) is slidably inserted and matched with the middle position of the sliding cylinder (20). A return spring (23) is fixed inside the sliding sleeve groove (22), and the return spring (23) is fixed to the end of the sliding cylinder (20).

6. The heat dissipation structure for a solar inverter according to claim 5, characterized in that, The same air intake sealing frame (9) is fixed on one side of each of the four sliding cylinders (20). An air intake rubber sleeve (21) is fixed between the air intake sealing frame (9) and the side wall of the heat sink (6). An air intake sealing rubber strip (10) is fixed on the side wall of the air intake sealing frame (9). The air intake sealing rubber strip (10) is pressed against the inner wall of the outer shell (1) and kept sealed.

7. The heat dissipation structure for a solar inverter according to claim 1, characterized in that, The inner wall of the heat dissipation box (6) has two fan boxes (7). One side of the fan box (7) is provided with a fan box air inlet (25), and one end of the fan box (7) is provided with a fan box exhaust port (19).

8. A heat dissipation structure for a solar inverter according to claim 7, characterized in that, A vertically arranged air intake filter (8) is fixed on one side of the fan housing (7). The air intake filter (8) is installed and fixed inside the air intake (25) of the fan housing. A fan wheel (26) is installed between the top and bottom of the fan housing (7) through a bearing. A fan blade (27) is fixed on the circumference of the fan wheel (26). The fan wheel (26) is driven by a first drive motor, which is installed inside the fan housing (7).

9. A heat dissipation structure for a solar inverter according to claim 8, characterized in that, The wind turbine (26) has an inner groove (29) in the middle and a side groove (32) on the circumference of the wind turbine (26). The bottom of the side groove (32) has a vertically arranged brush storage groove (28). A horizontally arranged lifting box (30) is slidably installed inside the inner groove (29). A circumferential slider (33) is arranged on the circumference of the lifting box (30). The circumferential slider (33) is slidably engaged with the side groove (32). A vertically arranged lifting screw (31) is installed in the middle of the inner groove (29) through a bearing. The lifting screw (31) is threadedly fitted into the middle of the lifting box (30).

10. A heat dissipation structure for a solar inverter according to claim 9, characterized in that, A rotating shaft (34) is mounted on the middle position of the circumferential slider (33) via a bearing. A vertically arranged cleaning brush (35) is mounted on one end of the rotating shaft (34) via a universal joint. The rotating shaft (34) is driven by a second drive motor located inside the elevator box (30).

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