Protective device for cooling fan of photovoltaic inverter

Abstract

A photovoltaic inverter cooling fan protection device comprises a shell and a baffle rotationally arranged on the shell, an air opening is formed in the baffle, a cooling fan is arranged at the position, corresponding to the air opening, of the baffle, guide rails are arranged on the positions, located on the two sides of the air opening, of the baffle, and filter screens for protecting the cooling fan are arranged in the guide rails in a sliding mode. And lifting devices matched with the baffles are arranged at two ends of the filter screen on the baffles. A cleaning assembly for cleaning the filter screen is arranged on the baffle and comprises a sliding rail arranged on the baffle, a sliding block is arranged on the sliding rail in a sliding mode, and a cleaning brush for cleaning the filter screen is arranged on the sliding block. And a driving device is arranged between the sliding block and the sliding rail. The filter screen is additionally arranged on the baffle, so that catkin and other sundries are prevented from gathering on the surfaces of the cooling fins and the fan to cause channel blockage. The cooling fan operates normally, enough cooling air is conveyed, safe operation of equipment is ensured, and the service life is prolonged.

Description

Technical Field

[0001] The invention belongs to the field of power inverters, and in particular relates to a photovoltaic inverter cooling fan protection device. Background Art

[0002] In the power industry, the inverter is the most important part of the photovoltaic power generation process. The inverter generates heat during operation, so fans are installed on the inverter to dissipate heat. In spring, when catkins fly, they will adhere to the cooling fan, affecting the normal operation of the cooling fan. At the same time, the catkins passing through the cooling fan are also easy to accumulate on the heat sink, affecting the blockage of the heat dissipation air duct, causing excessive temperature and damaging the components. At present, it is necessary to manually clean the catkins on the cooling fan and the heat sink, which wastes manpower. Summary of the invention

[0003] The present invention aims to provide a photovoltaic inverter cooling fan protection device to solve the technical problems raised in the above background technology.

[0004] To achieve the above purpose, the specific technical solution of a photovoltaic inverter cooling fan protection device of the present invention is as follows:

[0005] A photovoltaic inverter cooling fan protection device comprises a housing, a baffle rotatably arranged on the housing, an air outlet is opened on the baffle, a cooling fan is arranged at a position corresponding to the air outlet, and guide rails are arranged on both sides of the baffle at the air outlet, a filter screen for protecting the cooling fan is slidably arranged in the guide rails, and lifting devices cooperating with the filter screen are arranged at both ends of the baffle. A cleaning component for cleaning the filter screen is arranged on the baffle, and the cleaning component comprises a slide rail arranged on the baffle, a slider is slidably arranged on the slide rail, and a cleaning brush for cleaning the filter screen is arranged on the slider. A driving device is arranged between the slider and the slide rail.

[0006] Furthermore, the lifting device comprises a first motor arranged on the baffle, the first motor is provided with a first gear, and a first rack arranged on the end surface of the filter screen, the first gear meshes with the first rack.

[0007] Furthermore, the driving device comprises a second motor arranged on the slide block, the second motor is provided with a second gear, and a second rack arranged on the slide rail, the second gear meshing with the second rack.

[0008] Furthermore, a third motor is provided on the slider, and a connecting shaft is rotatably provided on the slider, and the cleaning brush is connected to the bottom end of the connecting shaft, and the third motor is connected to the top end of the connecting shaft.

[0009] Further, the filter screen is provided with a partition, and a cleaning assembly is provided above and below the air outlet. A shield is provided on the baffle corresponding to each cleaning assembly position, and the two shields are arranged with an opening at one end close to each other, and the bottom end of each shield is connected to a discharge channel.

[0010] Furthermore, a scraper is provided at the outer end of the slider, and a guard plate is provided at the inner end of the slider.

[0011] Furthermore, the discharge channel and the shield are arranged at an inclination.

[0012] The photovoltaic inverter cooling fan protection device of the present invention has the following advantages:

[0013] 1. The present invention installs a filter on the baffle to prevent debris such as catkins from accumulating on the surface of the heat sink and fan to cause channel blockage, so that the heat dissipation fan can operate normally, deliver sufficient cooling air, ensure the safe operation of the equipment, and extend its service life.

[0014] 2. The present invention can clean the debris on the filter by adding a cleaning component to the filter, which is fast and efficient and reduces manpower. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic structural diagram of a photovoltaic inverter cooling fan protection device of the present invention;

[0016] Figure 2 It is a schematic diagram of the baffle, guide rail and filter structure of the present invention;

[0017] Figure 3 It is a schematic diagram of the protective cover of the present invention;

[0018] Figure 4 It is a schematic diagram of the lifting device of the present invention;

[0019] Figure 5 It is a schematic diagram of the cleaning component and the driving device of the present invention.

[0020] Description of the markings in the figure:

[0021] 1. Shell; 2. Baffle; 3. Air outlet; 4. Filter; 5. Guide rail; 6. Lifting device; 61. First motor; 62. First gear; 63. First rack; 7. Cleaning assembly; 71. Slide rail; 72. Slider; 73. Cleaning brush; 8. Driving device; 81. Second motor; 82. Second gear; 83. Second rack; 9. Third motor; 91. Connecting shaft; 10. Partition; 11. Scraper; 12. Guard plate; 13. First guard cover; 14. Second guard cover; 15. Discharge channel. DETAILED DESCRIPTION

[0022] In order to better understand the purpose, structure and function of the present invention, a photovoltaic inverter cooling fan protection device of the present invention is further described in detail below in conjunction with the accompanying drawings.

[0023] like Figures 1 to 5As shown, a photovoltaic inverter cooling fan protection device of the present invention comprises a housing 1, a cavity for placing electronic components is reserved in the housing 1, and a baffle 2 for shielding the cavity is rotatably provided on one side of the housing 1. At the same time, an air outlet 3 is opened on the baffle 2, and a cooling fan is provided at a position corresponding to the air outlet 3 on the baffle 2, and the cooling fan is connected to an external power supply to power the cooling fan, so that the cooling fan can cool down the electronic components in the housing 1.

[0024] In order to prevent fluff and debris from entering the cooling fan and the heat sink, a protective filter 4 for the cooling fan is provided on the baffle 2 at the position corresponding to the air outlet 3, and the filter 4 can block impurities and catkins in the air. In order to facilitate the cleaning of impurities and catkins on the filter 4 and reduce the process of manpower cleaning the filter 4, a cleaning component 7 for cleaning the filter 4 is provided on the baffle 2. At the same time, in order to prevent the debris on the filter 4 from being sucked into the cooling fan and the heat sink when the cleaning component 7 cleans the filter 4, guide rails 5 are provided on both sides of the air outlet 3 on the baffle 2, and the filter 4 is slidably arranged in the guide rails 5, and a lifting device 6 is provided on both ends of the filter 4 on the baffle 2 to cooperate with and drive the filter 4 to rise and fall. At the same time, a cleaning component 7 is provided above and below the air outlet 3. In this way, before the cleaning assembly 7 cleans the filter 4, the filter 4 will be lifted by the lifting device 6, and then the impurities and catkins on the filter 4 will be cleaned by the cleaning assembly 7, thereby effectively preventing the cleaned impurities and catkins from entering the cooling fan and the heat sink. At the same time, after the filter 4 is lowered, the cleaning assembly 7 arranged below the air outlet 3 will clean the lower half of the filter 4, saving the process and time of manually cleaning the filter 4.

[0025] Specifically, the lifting device 6 includes a first motor 61 disposed on the baffle 2 and connected to an external power supply, and a first gear 62 is disposed on the output end of the first motor 61. A first rack 63 is disposed on the end face of the filter 4, and the first gear 62 is meshed with the first rack 63. When the filter 4 needs to be lifted, the first motor 61 can be started, and the first motor 61 drives the first gear 62 to rotate, and the filter 4 is driven to rise by the first rack 63 meshed with the first gear 62. It should be noted that the height of the filter 4 is greater than the height of the air outlet 3 of the baffle 2, so that when the filter 4 rises, the lower half of the filter 4 will directly replace the upper half of the filter 4 to continue to protect the air outlet 3, preventing catkins and debris in the air from entering the cooling fan and the heat sink, and affecting the normal operation of the cooling fan and the heat sink.

[0026] like Figure 5As shown, the cleaning assembly 7 for cleaning the filter 4 includes a slide rail 71 arranged on the baffle 2, a slider 72 is slidably arranged on the slide rail 71, and a cleaning brush 73 for cleaning the filter 4 is arranged on the slider 72. At the same time, a driving device 8 is also arranged between the slider 72 and the slide rail 71. The cleaning brush 73 on the slider 72 is driven by the driving device 8 to move along the slide rail 71, and the impurities and catkins on the filter 4 are cleaned during the movement of the cleaning brush 73, which is simple to operate and convenient to use. Among them, the driving device 8 for driving the slider 72 to move on the slide rail 71 includes a second motor 81 arranged on the slider 72 and connected to an external power supply, a second gear 82 is arranged on the second motor 81, and a second rack 83 is arranged on the top surface of the slide rail 71, and the second gear 82 is meshed with the second rack 83. The second motor 81 works to drive the second gear 82 to rotate, and through the second rack 83 meshing with the second gear 82, the second motor 81 drives the slider 72 to move along the direction of the second rack 83, and while the slider 72 moves, the cleaning brush 73 arranged on the slider 72 cleans the filter 4.

[0027] Preferably, a third motor 9 connected to an external power source is also provided on the slider 72, and a connecting shaft 91 is rotatably provided on the slider 72, and a cleaning brush 73 is connected to the bottom end of the connecting shaft 91, and the third motor 9 is connected to the top end of the connecting shaft 91. It should be noted that the cleaning brush 73 is cylindrical. When the slider 72 is driven by the driving device 8, the third motor 9 works, and the third motor 9 drives the connecting shaft 91 and the cleaning brush 73 on the connecting shaft 91, so that the cleaning brush 73 can better clean the impurities and catkins on the filter 4. It is understandable that a relay with a delay can be installed on the baffle 2 to control the up and down movement of the filter 4, as well as the operation of each motor, thereby eliminating the need for manual operation of the cleaning component 7, the lifting device 6 and the driving device 8.

[0028] As a further improvement, a partition 10 is provided on the filter screen 4, and a shield is provided on the baffle plate 2 corresponding to each cleaning component 7. The shield can protect the cleaning component 7, and an opening is provided at one end of the two shields close to each other, and the bottom end of each shield is connected to a discharge channel 15. At the same time, a scraper 11 is provided at the outer end of the slider 72 of the cleaning component 7, and a guard plate 12 is provided at the inner end of the slider 72. For the convenience of subsequent understanding, the shield located above the air outlet 3 is named the first shield 13, and the shield located below the air outlet 3 is named the second shield 14.

[0029] When the filter screen 4 is raised by the lifting device 6, the partition 10 on the filter screen 4 will block the bottom surface of the first protective cover 13, and the bottom surface of the scraper 11 set on the slider 72 is flush with the scraper 11, so as to prevent the cleaned catkins and impurities from being adsorbed on the lower half of the filter screen 4 again when the cleaning component 7 cleans the impurities and catkins of the filter screen 4. At this time, the driving device 8 and the cleaning component 7 can be started to clean the upper half of the filter screen 4. When the driving device 8 drives the cleaning component 7 to move, the scraper 11 set on the slider 72 of the cleaning component 7 will scrape off the impurities and catkins that fall on the top surface of the partition 10, and push the impurities and catkins to the discharge channel 15 of the first protective cover 13, and push them out through the discharge channel 15. After cleaning, the driving device 8 drives the cleaning component 7 to move to the initial position. When the filter screen 4 is lowered to the initial position by the lifting device 6, the lower half of the filter screen 4 is located in the second protective cover 14, and the partition 10 blocks the top of the second protective cover 14. At this time, the driving device 8 in the second protective cover 14 is started to drive the cleaning component 7 to clean the filter screen 4, and the cleaned impurities and catkins will remain at the bottom of the second protective cover 14. When the cleaning component 7 moves, the guard plate 12 on the slider 72 will scrape off the impurities and catkins that fall on the bottom of the second protective cover 14, and discharge the impurities and catkins through the discharge channel 15 of the second protective cover 14. In order to facilitate the discharge of impurities and catkins in the protective cover, the discharge channel 15 is set to be inclined with the protective cover.

[0030] Instructions for use: When a large amount of catkins and impurities are attached to the filter 4, start the lifting device 6 to drive the filter 4 to rise. After the filter 4 has risen, start the driving device 8 and the cleaning component 7 in the first protective cover 13. The driving device 8 drives the cleaning component 7 to clean the upper part of the filter 4, and move the cleaned impurities and catkins toward the discharge channel 15 and discharge them. When the upper part of the filter 4 is cleaned, the driving device 8 drives the cleaning component 7 to move to the initial position so that the upper part of the filter 4 can be cleaned next time. Similarly, when the lower part of the filter 4 needs to be cleaned, the lifting device 6 can be used to drive the filter 4 to descend, so that the filter 4 is in the second protective cover 14. At this time, the driving device 8 in the second protective cover 14 can be started to drive the cleaning component 7 to clean the filter 4.

[0031] It is to be understood that the present invention is described by some embodiments, and it is known to those skilled in the art that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A photovoltaic inverter cooling fan protection device, characterized in that: The invention comprises a housing (1), a baffle (2) rotatably arranged on the housing (1), an air outlet (3) being formed on the baffle (2), a heat dissipation fan being arranged at a position corresponding to the air outlet (3) on the baffle (2), and guide rails (5) being arranged on both sides of the air outlet (3) on the baffle (2), a filter screen (4) for protecting the heat dissipation fan being slidably arranged in the guide rails (5), and lifting devices (6) cooperating with the filter screen (4) being arranged at both ends of the filter screen (4) on the baffle (2); A cleaning assembly (7) for cleaning the filter (4) is provided on the baffle (2), and the cleaning assembly (7) comprises a slide rail (71) provided on the baffle (2), a slider (72) is slidably provided on the slide rail (71), and a cleaning brush (73) for cleaning the filter (4) is provided on the slider (72); A driving device (8) is provided between the slide block (72) and the slide rail (71).

2. A photovoltaic inverter cooling fan protection device according to claim 1, characterized in that: The lifting device (6) comprises a first motor (61) arranged on the baffle (2), and the first motor (61) is provided with a first gear (62); A first rack (63) is arranged on the end surface of the filter screen (4), and the first gear (62) is meshed with the first rack (63).

3. A photovoltaic inverter cooling fan protection device according to claim 2, characterized in that: The driving device (8) comprises a second motor (81) arranged on the slider (72), and the second motor (81) is provided with a second gear (82); A second rack (83) is arranged on the slide rail (71), and the second gear (82) is meshed with the second rack (83).

4. A photovoltaic inverter cooling fan protection device according to claim 3, characterized in that: The slider (72) is provided with a third motor (9), and a connecting shaft (91) is rotatably provided on the slider (72), the cleaning brush (73) is connected to the bottom end of the connecting shaft (91), and the third motor (9) is connected to the top end of the connecting shaft (91).

5. A photovoltaic inverter cooling fan protection device according to claim 4, characterized in that; The filter screen (4) is provided with a partition (10), and a cleaning assembly (7) is provided above and below the air outlet (3); A shield is provided on the baffle (2) at a position corresponding to each cleaning assembly (7), and one end of the two shields close to each other is opened, and the bottom end of each shield is connected to a discharge channel (15).

6. A photovoltaic inverter cooling fan protection device according to claim 1, characterized in that ； A scraper (11) is provided at the outer end of the slider (72), and a guard plate (12) is provided at the inner end of the slider (72).

7. A photovoltaic inverter cooling fan protection device according to claim 5, characterized in that ； The discharge channel (15) and the shield are arranged at an inclination.

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