A photovoltaic inverter

Abstract

The utility model discloses a photovoltaic inverter, including photovoltaic inverter main part, be provided with filter mechanism in photovoltaic inverter main part, the outside of photovoltaic inverter main part is provided with machine case, be provided with air outlet on machine case, the bottom of machine case is provided with the fan of upwards blowing, filter mechanism is installed above fan, filter mechanism includes mounting bracket, air filter element, sliding plate and folding type sealing curtain, mounting bracket fixed mounting is in machine case, air filter element can be dismantled and installs on mounting bracket, sliding plate sliding installation is on installation, and the left and right ends of folding type sealing curtain are fixed with the side end surface of mounting bracket and sliding plate respectively. The utility model has the advantages of convenient replacement air filter element under the non-stop state, effectively prevent the dust from entering the inside of machine case, solve the inconvenient maintenance and secondary pollution problem of the existing technology because of replacing filter screen and need to stop.

Description

Technical Field

[0001] This utility model relates to the field of inverter technology, specifically a photovoltaic inverter. Background Technology

[0002] With the rapid development of clean energy technologies, photovoltaic (PV) power generation systems have been widely applied in industrial, commercial, and residential sectors. As one of the core components of a PV system, the PV inverter plays a crucial role in converting the direct current (DC) generated by solar panels into alternating current (AC). Since PV inverters typically operate outdoors for extended periods, their internal electronic components have stringent requirements regarding the temperature and cleanliness of the operating environment. To ensure stable operation, the inverter chassis is usually equipped with a cooling system that uses forced ventilation fans to dissipate internal heat in a timely manner.

[0003] However, during the heat dissipation process, dust, sand and other particles carried by the outside air can easily enter the chassis with the airflow and adhere to the surface of key components such as circuit boards and power modules. This not only affects the heat dissipation efficiency, but may also lead to failures such as reduced electrical insulation performance, poor contact or even short circuits. In severe cases, it can cause equipment shutdown or damage, reducing system reliability and service life.

[0004] In existing technologies, some photovoltaic inverters use fixed air filters at the air inlet for dust prevention. However, this structure has significant drawbacks: when cleaning or replacing the filter, the system must be shut down; otherwise, dusty external air will directly enter the chassis during filter removal, causing secondary pollution. Furthermore, traditional filters often use screws or clips for fixing, making installation and removal cumbersome, maintenance inefficient, and prone to loosening or jamming after prolonged use, affecting sealing performance and the user experience. Therefore, a photovoltaic inverter is needed to solve these problems. Utility Model Content

[0005] The purpose of this utility model is to provide a photovoltaic inverter that has the advantages of convenient air filter replacement without shutting down the machine and effectively preventing dust from entering the chassis, thus solving the problems of inconvenience in maintenance and secondary pollution caused by the need to shut down the machine to replace the filter in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a photovoltaic inverter, comprising a photovoltaic inverter body, wherein a filter mechanism is provided inside the photovoltaic inverter body;

[0007] A chassis is provided on the outside of the main body of the photovoltaic inverter. An air outlet is provided on the chassis. An upward-blowing fan is provided at the bottom of the chassis. The filtration mechanism is installed above the fan. The filtration mechanism includes a mounting bracket, an air filter, a sliding plate, and a folding sealing curtain. The mounting bracket is fixedly installed on the chassis. The air filter is detachably installed on the mounting bracket. The sliding plate is slidably installed on the mounting bracket. The left and right ends of the folding sealing curtain are fixed to the side surfaces of the mounting bracket and the sliding plate, respectively.

[0008] As a preferred embodiment of the photovoltaic inverter of this utility model, the upper end face of the mounting bracket is provided with a ventilation window, and the side end face of the ventilation window is provided with a sliding groove that slides in cooperation with the air filter, the sliding plate and the folding sealing curtain.

[0009] As a preferred embodiment of the photovoltaic inverter of this utility model, the side end face of the slide plate is provided with a pulley that fits into the slide groove.

[0010] As a preferred embodiment of the photovoltaic inverter of this utility model, the mounting frame is provided with a fixed frame that is fixedly connected, the left and right sides of the fixed frame are provided with guide rods, and the upper end surface of the slide plate is provided with an ear plate that slides with the guide rods.

[0011] In a preferred embodiment of the photovoltaic inverter of this utility model, a first spring is sleeved on the guide rod, and the slide plate and the fixing frame are elastically slidably connected by the first spring.

[0012] In a preferred embodiment of the photovoltaic inverter of this utility model, the air filter is inserted into the sliding groove and slidably connected to the mounting bracket. The side end face of the air filter is provided with a first pin and a second pin that are slidably connected. The side end face of the mounting bracket is provided with a pin hole that cooperates with the first pin and the second pin.

[0013] As a preferred embodiment of the photovoltaic inverter of this utility model, the side end face of the air filter is provided with a guide rail that slides with the first pin and the second pin.

[0014] In a preferred embodiment of the photovoltaic inverter of this utility model, a sleeve is provided on the side end face of the first pin, a sliding rod is provided on the side end face of the second pin that slides in cooperation with the sleeve, and a second spring is provided inside the sleeve.

[0015] As a preferred embodiment of the photovoltaic inverter of this utility model, the bottom edges of the first and second pins near the air filter are rounded.

[0016] As a preferred embodiment of the photovoltaic inverter of this utility model, a flexible connecting strip is provided between the first pin and the second pin for fixed connection.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] 1. This utility model utilizes a collaborative structure of a sliding plate, a folding sealing curtain, and a first spring. When the air filter needs to be replaced or cleaned, it is pulled outward from the slide groove of the mounting bracket. At this time, the sliding plate associated with the air filter automatically slides outward synchronously under the reset action of the first spring. The movement of the sliding plate causes the folding sealing curtain to unfold, completely covering the ventilation window on the mounting bracket. This operation ensures that the ventilation window is always effectively blocked by the unfolded sealing curtain throughout the entire process of removing the air filter, blocking the channel for external dusty airflow to directly enter the inside of the chassis. This structure fundamentally solves the key problem of dust intrusion when replacing filter elements while the equipment is running continuously, greatly improving the online maintenance capability of the equipment and ensuring cleanliness during long-term operation.

[0019] 2. This utility model uses a locking structure composed of a first pin, a second pin, a guide rail, a second spring, and a flexible connecting strap. During installation, the air filter element is inserted into the slide groove along the guide rail. The rounded edge of the pin is compressed and retracted when it contacts the side wall of the mounting bracket, and automatically springs into the corresponding pin hole under the action of the second spring to lock, achieving a stable installation and preventing loosening. When replacing, simply pull the flexible connecting strap outward to overcome the elasticity of the second spring and pull the two pins out of the pin hole to unlock, and then easily pull out the filter element. This structure is simple and efficient to operate, significantly improving the convenience of air filter element installation and removal and the firmness after installation, solving the pain points of traditional filter element installation being easy to loosen or disassembly being difficult. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a cross-sectional view of the present invention;

[0022] Figure 3 This is a schematic diagram of the filter mechanism structure of this utility model;

[0023] Figure 4 This is an exploded view of the filtration mechanism of this utility model;

[0024] Figure 5 This is a cross-sectional structural diagram of the filter mechanism of this utility model;

[0025] Figure 6 This is a top sectional view of the filter mechanism of this utility model;

[0026] Figure 7 For the present utility model Figure 5 Enlarged view at point B in the middle;

[0027] Figure 8 For the present utility model Figure 6 Enlarged view at point C;

[0028] Figure 9 For the present utility model Figure 4 Enlarged view of point A in the middle.

[0029] In the diagram: 1. Main body of photovoltaic inverter; 101. Chassis; 102. Air outlet; 103. Fan; 2. Filtering mechanism; 201. Mounting bracket; 202. Air filter element; 203. Slide plate; 204. Fixing bracket; 205. Guide rod; 206. First spring; 207. Ear plate; 208. Slide groove; 209. Pin hole; 210. First pin; 211. Folding sealing curtain; 212. Ventilation window; 215. Second pin; 216. Flexible connecting strip; 217. Sleeve; 218. Second spring; 219. Slide rod; 220. Guide rail; 221. Pulley. Detailed Implementation

[0030] Please see Figures 1-9 A photovoltaic inverter includes a photovoltaic inverter body 1, and a filter mechanism 2 is provided inside the photovoltaic inverter body 1;

[0031] A housing 101 is installed on the outside of the main body 1 of the photovoltaic inverter. An air outlet 102 is provided on the housing 101, and an air inlet is provided at the bottom of the housing 101. An upward-blowing fan 103 is installed in the air inlet. A filter mechanism 2 is installed above the fan 103. The filter mechanism 2 includes a mounting bracket 201, an air filter element 202, a sliding plate 203, and a folding sealing curtain 211. The mounting bracket 201 is fixedly installed on the housing 101. The air filter element 202 is detachably installed on the mounting bracket 201. The sliding plate 203 is slidably installed on the mounting bracket. The left and right ends of the folding sealing curtain 211 are fixed to the side surfaces of the mounting bracket 201 and the sliding plate 203, respectively.

[0032] Furthermore, the upper end face of the mounting bracket 201 is provided with a ventilation window 212, and the side end face of the ventilation window 212 is provided with a sliding groove 208 that slides and engages with the air filter 202, the sliding plate 203 and the folding sealing curtain 211.

[0033] Airflow passes through the ventilation window 212 into the chassis 101 to dissipate heat from the electronic components inside the chassis 101. The air filter element 202 is installed in the slide groove 208 to intercept dust in the airflow. The sliding air filter element 202 is easy to replace and clean. The slide plate 203 drives the folding sealing curtain 211 to slide, so that when the air filter element 202 is installed, the folding sealing curtain 211 is folded into the mounting bracket 201. When the air filter element 202 is removed, the slide plate 203 drives the folding sealing curtain 211 to unfold, blocking the ventilation window 212, thereby preventing dust from passing through the ventilation window 212 into the chassis 101, so that the air filter element 202 can be replaced without stopping the equipment.

[0034] Furthermore, the side end face of the slide plate 203 is provided with a pulley 221 that fits into the slide groove 208.

[0035] By reducing the friction between the slide plate 203 and the slide groove 208 by using pulley 221, the slide plate 203 can quickly pop out under the reset action of the first spring 206, thereby improving the smoothness of the slide plate 203 when sliding out and retracting.

[0036] Furthermore, the mounting bracket 201 is provided with a fixed bracket 204 for fixed connection, and guide rods 205 are provided on the left and right sides of the fixed bracket 204. The upper end surface of the slide plate 203 is provided with an ear plate 207 that slides with the guide rods 205.

[0037] The guide rod 205 and ear plate 207 work together to further improve the stability of the slide plate 203 when sliding, and prevent the slide plate 203 from tilting when sliding, which would cause the slide plate 203 to get stuck in the slide groove 208 and affect the opening and closing of the folding sealing curtain 211. This further improves the stability of the slide plate 203 and prevents dust leakage from the gap between the slide plate 203 and the air filter element 202.

[0038] Furthermore, a first spring 206 is sleeved on the guide rod 205, and the slide plate 203 and the fixing frame 204 are elastically slidably connected through the first spring 206.

[0039] Under the reset action of the first spring 206, the slide plate 203 has a tendency to slide outward, so that when the air filter 202 is pulled out, the slide plate 203 can slide outward along with the air filter 202 until the folded sealing curtain 211 is fully unfolded and blocks the ventilation window 212, thereby preventing dust from passing through the ventilation window 212 when the air filter 202 is replaced.

[0040] Furthermore, the air filter element 202 is inserted into the slide groove 208 and slidably connected to the mounting bracket 201. The side end face of the air filter element 202 is provided with a first pin 210 and a second pin 215 that are slidably connected. The side end face of the mounting bracket 201 is provided with a pin hole 209 that cooperates with the first pin 210 and the second pin 215.

[0041] By inserting a pin into the pin hole 209, the air filter element 202 is fixed to the mounting bracket 201, preventing the air filter element 202 from loosening and falling off after installation, thus improving the convenience and stability of the air filter element 202 installation.

[0042] Furthermore, the side end face of the air filter element 202 is provided with a guide rail 220 that slides in cooperation with the first pin 210 and the second pin 215.

[0043] The guide rail 220 guides the first pin 210 and the second pin 215 so that they can be accurately inserted into the pin hole 209, further improving the ease of installation of the air filter element 202.

[0044] Furthermore, a sleeve 217 is provided on the side end face of the first pin 210, and a slide rod 219 is provided on the side end face of the second pin 215 that slides in cooperation with the sleeve 217. A second spring 218 is provided inside the sleeve 217.

[0045] The second spring 218 presses the second pin 215 and the first pin 210 outward, so that the first pin 210 and the second pin 215 are continuously inserted into the pin hole 209, preventing the pins from falling out and causing the air filter element 202 to fall off.

[0046] Furthermore, the bottom edges of the first pin 210 and the second pin 215 near the air filter 202 are rounded.

[0047] The edges of the first pin 210 and the second pin 215 are rounded so that when the air filter element 202 is inserted into the slide groove 208, the pins can automatically retract inward and thus automatically insert into the pin hole 209.

[0048] Furthermore, a flexible connecting strip 216 is provided between the first pin 210 and the second pin 215 for fixed connection.

[0049] By pulling the flexible connecting strip 216 outward, the first pin 210 and the second pin 215 are pressed inward against the second spring 218, causing it to slide out of the pin hole 209. This allows the air filter element 202 to be pulled out of the slide groove 208 and quickly removed for replacement.

[0050] During normal operation, the fan 103 at the bottom of the chassis 101 blows air upwards. The airflow passes sequentially through the air filter 202 in the filter mechanism 2 above the fan 103 and the ventilation window 212 on the upper surface of the mounting bracket 201 before entering the chassis 101 to dissipate heat from the electronic components inside. The air filter 202 intercepts dust in the airflow. The air filter 202 is then fixed to the mounting bracket 201 by inserting the first pin 210 and the second pin 215 into the pin hole 209 on the side surface of the mounting bracket 201. The first pin 210 and the second pin 215 are secured to the mounting bracket 201 by the second spring 21 within the sleeve 217. Under the action of 8, the insertion pin hole 209 is continuously maintained. At the same time, the slide plate 203 compresses the first spring 206 under the pressure of the air filter element 202, and the folding sealing curtain 211 is folded into the mounting bracket 201. When it is necessary to replace or clean the air filter element 202, there is no need to stop the machine. Just pull out the flexible connecting strip 216 between the first pin 210 and the second pin 215, so that the first pin 210 and the second pin 215 compress the second spring 218 inward and slide out of the pin hole 209. Then, the air filter element 202 is pulled out of the slide groove 208 of the mounting bracket 201. During the process of pulling out the air filter element 202, the slide plate 203... Under the reset action of the first spring 206 on the guide rod 205, the air filter 202 slides outward along the guide rod 205 via the ear plate 207. At the same time, the pulley 221 on the side end face of the slide plate 203 slides in the slide groove 208 to ensure smooth sliding. The slide plate 203 drives the folding sealing curtain 211 to gradually unfold. When the air filter 202 is completely pulled out, the folding sealing curtain 211 is just fully unfolded to block the ventilation window 212, preventing dust from entering the chassis 101 through the ventilation window 212. After replacement or cleaning, the air filter 202 is reinserted into the slide groove 208. During the insertion process, the air filter 202 presses the first pin 210 and the second pin 221. The rounded edges of the 15-inch plate cause the first pin 210 and the second pin 215 to retract inward along the guide rail 220 and compress the second spring 218. When the air filter 202 is fully inserted, the first pin 210 and the second pin 215 automatically pop out under the action of the second spring 218 and insert into the corresponding pin hole 209 to complete the fixation. At the same time, the air filter 202 pushes the slide plate 203 to slide inward and compress the first spring 206, so that the foldable sealing curtain 211 is folded back into the mounting frame 201. At this time, the equipment returns to normal operation, and the airflow can enter the chassis 101 again through the air filter 202 and the ventilation window 212 for heat dissipation.

[0051] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A photovoltaic inverter, comprising a photovoltaic inverter body (1), characterized in that: The photovoltaic inverter body (1) is equipped with a filter mechanism (2); A housing (101) is provided on the outside of the main body (1) of the photovoltaic inverter. An air outlet (102) is provided on the housing (101). An upward-blowing fan (103) is provided at the bottom of the housing (101). The filter mechanism (2) is installed above the fan (103). The filter mechanism (2) includes a mounting bracket (201), an air filter (202), a slide plate (203), and a folding sealing curtain (211). The mounting bracket (201) is fixedly installed on the housing (101). The air filter (202) is detachably installed on the mounting bracket (201). The slide plate (203) is slidably installed on the mounting bracket. The left and right ends of the folding sealing curtain (211) are fixed to the side surfaces of the mounting bracket (201) and the slide plate (203), respectively.

2. A photovoltaic inverter according to claim 1, characterized in that: The upper end face of the mounting bracket (201) is provided with a ventilation window (212), and the side end face of the ventilation window (212) is provided with a sliding groove (208) that slides in cooperation with the air filter (202), the sliding plate (203) and the folding sealing curtain (211).

3. A photovoltaic inverter according to claim 2, characterized in that: The side end face of the slide plate (203) is provided with a pulley (221) that fits into the slide groove (208).

4. A photovoltaic inverter according to claim 1, characterized in that: The mounting bracket (201) is provided with a fixed bracket (204) for fixed connection. Guide rods (205) are provided on the left and right sides of the fixed bracket (204). The upper end surface of the slide plate (203) is provided with an ear plate (207) that slides with the guide rods (205).

5. A photovoltaic inverter according to claim 4, characterized in that: A first spring (206) is sleeved on the guide rod (205), and the slide plate (203) and the fixing frame (204) are elastically slidably connected by the first spring (206).

6. A photovoltaic inverter according to claim 1, characterized in that: The air filter element (202) is inserted into the slide groove (208) and slidably connected to the mounting bracket (201). The side end face of the air filter element (202) is provided with a first pin (210) and a second pin (215) that are slidably connected. The side end face of the mounting bracket (201) is provided with a pin hole (209) that cooperates with the first pin (210) and the second pin (215).

7. A photovoltaic inverter according to claim 6, characterized in that: The side end face of the air filter (202) is provided with a guide rail (220) that slides in cooperation with the first pin (210) and the second pin (215).

8. A photovoltaic inverter according to claim 6, characterized in that: The first pin (210) has a sleeve (217) on its side end face, and the second pin (215) has a slide rod (219) that slides with the sleeve (217) on its side end face. The sleeve (217) contains a second spring (218).

9. A photovoltaic inverter according to claim 6, characterized in that: The bottom edge of the first pin (210) and the second pin (215) near the air filter (202) is rounded.

10. A photovoltaic inverter according to claim 6, characterized in that: A flexible connecting strip (216) is provided between the first pin (210) and the second pin (215) for fixed connection.

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