Outdoor frequency converter

Abstract

The utility model relates to the technical field of frequency converters, in particular to an outdoor frequency converter which comprises a cabinet with a containing cavity, a partition plate and an air duct plate are installed in the containing cavity, an air outlet and an air inlet are formed in the bottom and the side portion of the cabinet respectively, and a through hole is formed in the side face of the top of the air duct plate. An air channel extending in a zigzag mode is formed among the air inlet, the through hole and the air outlet, and a fan is installed in the air channel. The main device is installed in the rear cabin, the heat dissipation device is installed in the middle cabin, and the auxiliary device is installed in the front cabin. The accommodating cavity of the outdoor frequency converter is divided into the front cabin, the middle cabin and the rear cabin by the partition plates and the air duct plates, the three cabins divide electrical apparatus elements into three types of devices according to different protection and heat dissipation requirements, the three types of devices are respectively installed in the corresponding cabins, and the air ducts with high heat dissipation effects are designed among the cabins, so that the heat dissipation effect of the outdoor frequency converter is improved. Therefore, the heat dissipation effect of the equipment is improved while the protection level of the equipment is ensured, and the size of the equipment is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of frequency converters, and particularly relates to an outdoor type frequency converter. Background Art

[0002] The outdoor type frequency converter is designed for outdoor installation and operation and can withstand harsh weather conditions such as high temperature, low temperature, humidity, dust and corrosive environment. The existing outdoor frequency converter cabinets usually have only one integral chamber, and various electrical components, such as circuit boards and heat dissipation devices, are all installed in the same chamber. However, in the same space, the higher the protection level, the greater the difficulty of heat dissipation. Therefore, it is very difficult for the existing outdoor frequency converters to meet the requirements of high protection and heat dissipation at the same time.

[0003] Secondly, in the prior art, the outdoor frequency converters that meet the requirements of high protection and heat dissipation usually need to increase the ventilation area inside the cabinet, resulting in a relatively large overall volume of the equipment. Content of the Utility Model

[0004] In view of this, the purpose of the utility model is to provide an outdoor type frequency converter to solve the technical problems that it is very difficult for the existing outdoor type frequency converters to meet the requirements of high protection and heat dissipation at the same time, and the outdoor frequency converters that meet the requirements of high protection and heat dissipation in the prior art usually need to increase the ventilation area inside the cabinet, resulting in a relatively large overall volume of the equipment.

[0005] The utility model is realized through the following technical solutions:

[0006] An outdoor type frequency converter includes a cabinet with a receiving cavity. A partition board and an air duct board are arranged at intervals in the receiving cavity to vertically partition the receiving cavity into a front chamber, a middle chamber and a rear chamber;

[0007] An air outlet and an air inlet communicating with the middle chamber and the rear chamber are respectively arranged at the bottom and side of the cabinet. A through hole communicating the middle chamber and the rear chamber is arranged at the top side of the air duct board, and a tortuously extending air duct is formed among the air inlet, the through hole and the air outlet. A fan is installed in the air duct;

[0008] It further includes a main device installed in the rear chamber, a heat dissipation device installed in the middle chamber, and an auxiliary device installed in the front chamber.

[0009] Furthermore, support plates are respectively installed on the opposite surfaces of the rear side wall of the cabinet and the air duct board. The installation height of the support plates is greater than the installation height of the air inlet, and both ends of the support plates are respectively attached to the left and right side walls of the cabinet;

[0010] Along the depth direction of the support plates, side plates are vertically and fixedly connected to the two support plates respectively, and end frames are jointly connected to both ends of the two side plates;

[0011] Along the depth direction of the side plate, a plurality of intermediate plates are installed between the two end frames, and a plurality of heat dissipation aluminum tubes are commonly penetrated through the plurality of intermediate plates.

[0012] Furthermore, side air vents are respectively formed on the air duct plate and the partition plate, and an air box is fixedly connected through the two side air vents. The air outlet ends of the plurality of heat dissipation aluminum tubes all extend into the air inlet of the air box, and the air outlet of the air box communicates with the front cabin;

[0013] An equipment box is installed outside the cabinet. Air holes and circulation holes are respectively formed on the box wall of the equipment box. The equipment box communicates with the rear cabin and the front cabin through the air holes and the circulation holes respectively, and a fan is installed at the air hole.

[0014] Furthermore, the end frame close to the equipment box is concave, the bottom wall of the end frame faces the equipment box, and the air inlet end of the heat dissipation aluminum tube extends into the concave space of the end frame.

[0015] Furthermore, a dust-proof net is installed at the air outlet, and a shutter is installed at the air inlet. The shutter includes a mounting frame fixedly connected outside the air inlet, and a lower mounting plate is fixedly connected behind the mounting frame;

[0016] Along the depth direction of the lower mounting plate, a plurality of flow guiding plates are evenly arranged on the lower mounting plate, and the side of the flow guiding plate away from the mounting frame extends into the cabinet through the air inlet;

[0017] The middle part of the flow guiding plate bends and protrudes outwards to form a blocking part, and a maze-like channel is formed by enclosing between adjacent two flow guiding plates.

[0018] Furthermore, the convex surface of the blocking part faces the inlet and outlet of the maze-like channel, and a first baffle and a second baffle are respectively fixedly connected to the convex surface and the concave surface of adjacent two flow guiding plates;

[0019] The first baffle and the second baffle respectively enclose a blocking space with the convex surface of the flow guiding plate and the concave surface of the flow guiding plate, and the opening of the blocking space faces the inlet of the maze-like channel.

[0020] Furthermore, the two side parts of the flow guiding plate are respectively perpendicular to the opening of the mounting frame and the air inlet, and the two side parts of the flow guiding plate are respectively folded towards the side away from the blocking part to form folded edges, and the folded edge away from the mounting frame extends into the maze-like channel.

[0021] Furthermore, the lower mounting plate is inclined and installed behind the mounting frame, and the bottom of the flow guiding plate is attached to the surface of the lower mounting plate;

[0022] The upper and lower sides of the lower mounting plate are bent upward and downward respectively to form a first mounting portion and a first limiting portion. The first mounting portion is used for fixedly connecting with the mounting frame, and the first limiting portion is located in front of the outlet of the labyrinth-shaped channel.

[0023] Furthermore, the air duct plate includes a first plate body, a second plate body and a third plate body that are sequentially connected end to end.

[0024] The first plate body is in a stepped shape. The fan is installed above the corner of the first plate body and is located between the first plate body and the partition plate.

[0025] The second plate body includes a first vertical portion connected to the first plate body and a transverse portion connected to the third plate body. The transverse portion is used for installing the main device, and the transverse portion is fixedly connected or integrally formed with the first vertical portion.

[0026] The third plate body includes a bent portion fixedly connected to the transverse portion. The bent portion faces the air inlet, and a second vertical portion fixedly connected to the bottom wall of the cabinet. The second vertical portion is integrally formed with the bent portion.

[0027] The beneficial effects of the present utility model are as follows:

[0028] 1. The accommodation cavity of the outdoor frequency converter of the present utility model is divided into three chambers, namely the front chamber, the middle chamber and the rear chamber, by the partition plate and the air duct plate. According to different protection and heat dissipation requirements, the electrical components are divided into three types of devices and installed in the corresponding chambers respectively. Specifically, in the outdoor frequency converter of the present utility model, the middle chamber is communicated with the top of the rear chamber, and a tortuously extending air duct is formed between the air inlet, the through hole and the air outlet. When the fan installed in the air duct works, the hot air in the rear chamber is sucked to the air inlet of the fan. After the air is accelerated by the high-speed rotation of the impeller of the fan, it flows along the middle chamber and is discharged downward from the air outlet of the cabinet, realizing air cooling and heat dissipation for the main device installed in the air duct.

[0029] Secondly, when the fan sucks the hot air inside the rear chamber upward and discharges the hot air in the middle chamber downward together under the action of the fan, the outside air is drawn into the cabinet from the air inlet to supplement, and then flows along the air duct under the action of the fan and is finally discharged from the air outlet. As a result, the outside air flows and exchanges heat in the air duct. Since the main device is installed in the air duct, most of the heat generated by the electrical components during operation can be taken away when the air flows and circulates in the air duct, achieving a better heat dissipation effect, enabling the frequency converter to operate stably, and at the same time increasing the service life of each part of the equipment.

[0030] 2. The partition board can be made of a material with good heat conduction performance, and installing the heat dissipation device between the partition board and the air duct board can conduct heat between the front cabin and the rear cabin to achieve heat dissipation. Moreover, since the heat dissipation device is installed in the air duct, when air flows along the air duct under the action of the fan, the heat on the heat dissipation device and the partition board can be taken away, avoiding heat accumulation and further improving the heat dissipation effect.

[0031] 3. The outdoor frequency conversion cabinet of the present utility model sucks the outside air from a lower position for heat dissipation. Since heat accumulates upwards, the air at the lower position has lower heat, which is more conducive to the heat dissipation work. By installing the fan at the top of the cabinet, it is more conducive to taking out the heat accumulated at the top of the cabin from the cabinet. By setting the air outlet at the bottom of the cabinet, compared with the prior art where it is set at the top of the cabinet, it is more conducive to improving the protection level of the frequency converter, and the path between the air inlet and the air outlet is extended to obtain a larger heat dissipation area, improving the heat dissipation effect, and there is no need to set up a protection structure outside the cabinet to protect the air outlet, so as to reduce the volume of the whole machine.

[0032] 4. By installing other auxiliary devices with lower heat dissipation or for the convenience of maintenance on the partition board, and then using the heat dissipation device installed in the middle cabin to conduct heat dissipation between the rear cabin and the front cabin, all devices can be compactly installed in the corresponding chambers. The outdoor frequency converter of the present utility model separately designs independent chambers with high protection levels and air ducts with high heat dissipation effects according to requirements, and classifies and installs the corresponding electrical components in the corresponding chambers and air ducts, thereby improving the heat dissipation effect of the equipment and reducing the volume of the equipment while ensuring the protection level of the equipment. Description of the Drawings

[0033] Figure 1 It is a schematic structural diagram of the outdoor frequency converter of the present utility model.

[0034] Figure 2 It is a schematic connection diagram of the mounting rack and the cabinet of the outdoor frequency converter of the present utility model.

[0035] Figure 3 It is a schematic connection diagram of the air duct board and the cabinet of the outdoor frequency converter of the present utility model.

[0036] Figure 4 It is a schematic connection diagram of the air box, the air duct board and the partition board of the outdoor frequency converter of the present utility model.

[0037] Figure 5 It is a schematic connection diagram of the fan and the equipment box of the outdoor frequency converter of the present utility model.

[0038] Figure 6 Schematic diagram of the positions of the air holes and circulation holes of the outdoor-type frequency converter of the present utility model.

[0039] Figure 7 Schematic diagram of the structure of the air duct plate of the outdoor-type frequency converter of the present utility model.

[0040] Figure 8 Schematic diagram of the structure of the louver of the outdoor-type frequency converter of the present utility model.

[0041] Figure 9 Schematic diagram of the connection between the guide plate and the lower mounting plate of the outdoor-type frequency converter of the present utility model.

[0042] Figure 10 Of the present utility model Figure 9 Enlarged view of part A.

[0043] Figure 11 Top view of the guide plate of the outdoor-type frequency converter of the present utility model.

[0044] Figure 12 Schematic diagram of the structure of the insertion part of the guide plate of the outdoor-type frequency converter of the present utility model.

[0045] Figure 13 Schematic diagram of the structure of the lower mounting plate of the outdoor-type frequency converter of the present utility model.

[0046] Figure 14 Schematic diagram of the structure of the upper mounting plate of the outdoor-type frequency converter of the present utility model.

[0047] In the figure: 1 - accommodation cavity, 2 - cabinet, 3 - partition board;

[0048] 4 - air duct plate, 41 - first plate body, 42 - second plate body, 421 - first vertical part, 422 - transverse part, 43 - third plate body, 431 - bending part, 432 - second vertical part;

[0049] 5 - front cabin, 6 - middle cabin, 7 - rear cabin, 8 - air outlet, 9 - air inlet, 10 - through hole, 11 - air duct, 12 - fan, 13 - support plate, 14 - side plate, 15 - end frame, 16 - mounting rack, 17 - intermediate plate, 18 - heat dissipation aluminum tube, 19 - side air vent, 20 - air box, 21 - equipment box, 22 - air hole, 23 - circulation hole, 24 - fan, 25 - dust-proof net;

[0050] 26 - Blinds, 261 - Installation frame, 262 - Lower installation plate, 2621 - First installation part, 2622 - First limiting part, 2623 - Jack, 2624 - Insertion part, 2625 - Notch, 263 - Deflector, 2631 - Blocking part, 2632 - First baffle, 2633 - Second baffle, 2634 - Blocking space, 2635 - Hem, 2636 - Fixing part, 264 - Labyrinth channel, 265 - Upper installation plate, 2651 - Second installation part, 2652 - Second limiting part;

[0051] 27 - Base, 28 - Main device, 29 - Heat dissipation device, 30 - Auxiliary device. Specific embodiments

[0052] Typical embodiments embodying the features and advantages of the present utility model will be specifically described in the following description. It should be understood that the present utility model can have various variations in different embodiments, all of which do not depart from the scope of the present utility model, and the descriptions and illustrations therein are essentially for illustrative purposes rather than for limiting the present utility model.

[0053] In the description of this application, the orientation or positional relationship indicated by terms such as "upper" and "lower" is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the structure referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation to this application.

[0054] Please refer to Figures 1 to 7 , the present utility model provides a technical solution: an outdoor type frequency converter, including a cabinet 2 having a receiving cavity 1, a partition 3 and an air duct plate 4 are spaced in the middle of the receiving cavity 1 to vertically partition the receiving cavity 1 into a front cabin 5, a middle cabin 6 and a rear cabin 7;

[0055] An air outlet 8 and an air inlet 9 communicating with the middle cabin 6 and the rear cabin 7 are respectively opened at the bottom of the cabinet 2 and the lower part of the rear side wall of the cabinet 2. A base 27 is provided at the bottom of the cabinet 2. The base 27 is a rectangular frame structure formed by sequentially connecting and splicing multiple U-shaped steel bodies end to end. By raising the cabinet 2 through the base 27, it is beneficial to the installation of the cabinet 2 and the ventilation and heat dissipation of the cabinet 2;

[0056] A through hole 10 communicating the middle cabin 6 and the rear cabin 7 is opened at the top side of the air duct plate 4, and a tortuously extending air duct 11 is formed between the air inlet 9, the through hole 10 and the air outlet 8. A fan 12 is installed in the air duct 11. The fan 12 is specifically installed on the air duct plate 4, and the air inlet of the fan 12 is aligned and coincident with the through hole 10, which is beneficial to sucking the outside air from the air inlet 9 into the rear cabin 7;

[0057] It also includes a main device 28 installed in the rear compartment 7. For example, a transformer, a reactor, etc. are installed in the air duct 11, and a heat dissipation device 29 installed in the middle compartment 6, such as a radiator. When the radiator is specifically installed, it is installed between the air duct plate 4 and the partition plate 3, and an auxiliary device 30 installed in the front compartment 5, such as a circuit board, a sensor, etc.

[0058] The accommodation cavity 1 of the outdoor frequency converter of the present utility model is separated into three compartments, namely the front compartment 5, the middle compartment 6 and the rear compartment 7 by the partition plate 3 and the air duct plate 4. According to different protection and heat dissipation requirements, the electrical components are divided into three types of devices and installed in the corresponding compartments respectively;

[0059] Specifically, in the outdoor frequency converter of the utility model, the middle compartment 6 is communicated with the top of the rear compartment 7, and a tortuously extending air duct 11 is formed between the air inlet 9, the through hole 10 and the air outlet 8. When the fan 12 installed in the air duct 11 works, the hot air in the rear compartment 7 is sucked to the air inlet of the fan 12. After the air is accelerated by the high-speed rotation of the impeller of the fan 12, it flows along the middle compartment 6 and is discharged downward from the air outlet 8 out of the cabinet 2, realizing air-cooled heat dissipation for the main device 28 installed in the air duct 11;

[0060] Secondly, when the fan 12 sucks the hot air inside the rear compartment 7 upward and discharges the hot air in the middle compartment 6 downward together under the action of the fan 12, the outside air is sucked in from the air inlet 9 to supplement the cabinet 2, and then flows along the air duct 11 under the action of the fan 12 and is finally discharged from the air outlet 8. Thus, the outside air flows and exchanges heat in the air duct 11. Since the main device 28 is installed in the air duct 11, most of the heat generated by the electrical components can be taken away when the air flows and circulates in the air duct 11, so as to achieve a better heat dissipation effect, enable the frequency converter to operate stably, and at the same time increase the service life of each part of the equipment;

[0061] The partition plate 3 can be made of a material with good heat conduction performance, and installing the heat dissipation device 29 between the partition plate 3 and the air duct plate 4 can conduct heat to the front compartment 5 and the rear compartment 7 to achieve heat dissipation. And because the heat dissipation device 29 is installed in the air duct 11, when the air flows along the air duct 11 under the action of the fan 12, the heat on the heat dissipation device 29 and the partition plate 3 can be taken away, avoiding heat accumulation and further improving the heat dissipation effect;

[0062] Meanwhile, the outdoor frequency conversion cabinet of the present utility model sucks in outside air from a lower position for heat dissipation. Since heat accumulates upwards, the air at the lower position has a lower temperature, which is more conducive to the heat dissipation process. By installing the fan 12 at the top of the cabinet 2, it is more conducive to taking out the heat accumulated at the top of the cabin from the cabinet 2. By setting the air outlet 8 at the bottom of the cabinet 2, compared with the prior art where it is set at the top of the cabinet 2, it is more conducive to improving the protection level of the frequency converter, and extends the path between the air inlet 9 and the air outlet 8 to obtain a larger heat dissipation area, improving the heat dissipation effect, and there is no need to set up a protection structure outside the cabinet 2 to protect the air outlet, thereby reducing the volume of the whole machine.

[0063] Finally, install the other auxiliary devices 30 with lower heat dissipation or, for the convenience of maintenance, install the auxiliary devices 30 on the partition plate 3, and then use the heat dissipation device 29 installed in the middle cabin 6 to conduct heat dissipation to the rear cabin 7 and the front cabin 5. The specific structure and working principle of the heat dissipation device 29 are relatively mature in the prior art and will not be elaborated here. Thus, all devices are compactly installed in the corresponding chambers. The outdoor frequency converter of the present utility model separately designs independent chambers with high protection levels and air ducts with high heat dissipation effects according to requirements, and classifies and installs the corresponding electrical components in the corresponding chambers and air ducts, thereby improving the heat dissipation effect of the device and reducing the volume of the device while ensuring the protection level of the device.

[0064] Please refer to Figures 2 to 4 , support plates 13 are respectively installed on the opposite surfaces of the rear side wall of the cabinet 2 and the air duct plate 4. The installation height of the support plates 13 is greater than the setting height of the air inlet 9, and both ends of the support plates 13 are respectively attached to the left and right side walls of the cabinet 2;

[0065] Along the depth direction of the support plates 13, side plates 14 are respectively vertically fixedly connected to the two support plates 13. Both ends of the two side plates 14 are respectively commonly connected to end frames 15. The two end frames 15 and the two side plates 14 cooperate to form a frame structure. This frame structure is located in the rear cabin 7 and above the air inlet 9. While the support plates 13 are used to install this frame structure, they partially block the bottom of this frame structure, so that air circulates through this frame structure when flowing in the rear cabin 7.

[0066] Along the depth direction of the side plate 14, a plurality of intermediate plates 17 are installed between the two end frames 15. A plurality of heat dissipation aluminum tubes 18 are commonly penetrated through the plurality of intermediate plates 17. Since more electrical components are installed on the side of the air duct plate 4 close to the air inlet 9, the heat accumulated at the top of the cabinet 2 can be absorbed by the heat dissipation aluminum tubes 18 and transferred to various parts of the tube body to achieve heat dissipation. And during the process of the fan 12 working to drive the gas to flow and circulate, the heat accumulated on the outer wall of the heat dissipation aluminum tube 18 can be effectively taken away, thereby effectively controlling the temperature of the equipment and ensuring the safety and performance of the equipment.

[0067] Please refer to Figure 1 、 Figure 4 、 Figure 5 and Figure 6 As shown in the figure, side air vents 19 are respectively formed on the air duct plate 4 and the partition plate 3. A wind box 20 is fixedly connected through the two side air vents 19. The air outlet ends of the plurality of heat dissipation aluminum tubes 18 all extend into the air inlet of the wind box 20, and the air outlet of the wind box 20 is communicated with the front cabin 5;

[0068] An equipment box 21 is installed outside the cabinet 2. Air holes 22 and circulation holes 23 are respectively formed on the box wall of the equipment box 21. The equipment box 21 is communicated with the rear cabin 7 and the front cabin 5 through the air holes 22 and the circulation holes 23 respectively, and a fan 24 is installed at the air holes 22;

[0069] The end frame 15 close to the equipment box 21 is concave. The bottom wall of the end frame 15 faces the equipment box 21, and the air inlet end of the heat dissipation aluminum tube 18 extends into the concave space of the end frame 15.

[0070] When the fan 24 works, it blows air into the rear cabin 7 through the air holes 22, thereby driving the air flow in the concave space of the end frame 15. The air disperses from this space into each of the heat dissipation aluminum tubes 18 and takes away the heat accumulated in the heat dissipation aluminum tubes 18 to improve the heat dissipation effect of the heat dissipation aluminum tubes 18 on the rear cabin 7. Subsequently, the air flows out from the other end of the heat dissipation aluminum tube 18 and flows into the front cabin 5 along the wind box 20 to perform air-cooled heat dissipation on the front cabin 5. Finally, the air enters the equipment box 21 again through the circulation holes 23 and is discharged from the heat dissipation holes at the bottom of the equipment box 21, thereby further improving the heat dissipation effect of the equipment.

[0071] The louver structure of the present utility model:

[0072] Please refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 8 、 Figure 9 、 Figure 10 、Figure 11 , Figure 12 , Figure 13 and Figure 14 , a dust-proof net 25 is installed at the air outlet 8. The dust-proof net 25 is used to ensure the heat dissipation and ventilation inside the cabinet 2 while blocking foreign impurities from entering the cabinet 2, thereby playing a role in dust prevention and heat dissipation; a louver 26 is installed at the air inlet 9. The louver 26 includes a mounting frame 261 fixedly connected outside the air inlet 9, and a lower mounting plate 262 is fixedly connected to the rear of the mounting frame 261;

[0073] Along the depth direction of the lower mounting plate 262, a plurality of flow guide plates 263 are evenly arranged on the lower mounting plate 262. The side of the flow guide plate 263 away from the mounting frame 261 extends into the cabinet 2 through the air inlet 9;

[0074] The middle of the flow guide plate 263 bends outward to form a blocking portion 2631. The blocking portion 2631 is V-shaped, and a labyrinth-shaped channel 264 is formed by enclosing between adjacent two flow guide plates 263;

[0075] When the outside air enters the cabinet 2 through the labyrinth-shaped channel 264, since the blocking portion 2631 protrudes behind the inlet of the labyrinth-shaped channel 264, when the outside air enters the cabinet 2 through the labyrinth-shaped channel 264, the blocking portion 2631 blocks and intercepts impurities or rainwater in the air, making it stay in front of the windward side of the blocking portion 2631. Subsequently, the air continues to flow along the labyrinth-shaped channel 264 around the blocking portion 2631. During the flowing process, the air flows to the concave surface of the blocking portion 2631 of another flow guide plate 263, and the blocking portion 2631 of another flow guide plate 263 performs secondary blocking and interception on the impurities or rainwater in the air. Finally, the air flows into the cabinet 2 for heat exchange to achieve heat dissipation;

[0076] The impurities or rainwater accumulated in the labyrinth-shaped channel 264 are collected on the lower mounting plate 262 along the flow guide plate 263 under the influence of gravity, thereby preventing impurities or rainwater from entering the inside of the cabinet 2 or adhering to the flow guide plate 263 to cause blockage of the labyrinth-shaped channel 264, and ensuring the normal ventilation and heat dissipation of the frequency converter;

[0077] Secondly, the louver 26 of the present utility model is structurally compact and small. Compared with the hole-type dust-proof net ventilation structure in the prior art, the labyrinth-shaped channel 264 connects multiple holes, resulting in a larger air intake volume, better ventilation and heat dissipation effects. Moreover, during the ventilation and heat dissipation process through the louver 26, it can simultaneously prevent rainwater from entering the cabinet 2 through the air inlet 9, eliminating the need to additionally install a waterproof structure at the air inlet 9. This effectively reduces the volume of the device and lowers the production cost of the device.

[0078] The convex surface of the blocking portion 2631 faces the inlet and outlet of the labyrinth-shaped channel 264, and first baffles 2632 and second baffles 2633 are respectively fixedly connected to the convex surface and the concave surface of adjacent two flow guide plates 263; the first baffle 2632 and the second baffle 2633 respectively enclose a U-shaped blocking space 2634 with the convex surface of the flow guide plate 263 and the concave surface of the flow guide plate 263, and the opening of the blocking space 2634 faces the inlet of the labyrinth-shaped channel 264;

[0079] When external air enters and flows in the labyrinth-shaped channel 264, since the convex surface of the blocking portion 2631 faces the inlet of the labyrinth-shaped channel 264, impurities or rainwater in the air can be initially blocked and intercepted by the blocking portion 2631. Subsequently, the air continues to flow along the convex surface of the blocking portion 2631, and most of the air flows into the blocking space 2634 formed by the first baffle 2632 and the convex surface of the flow guide plate 263. The impurities or rainwater in the air can be further blocked and intercepted through the blocking space 2634. A small portion of the air and the subsequent air flowing out of the blocking space 2634 again flow along the concave surface of the other flow guide plate 263 into the blocking space 2634 formed by the second baffle 2633 and the concave surface of the flow guide plate 263, and the impurities or rainwater in the air are blocked and intercepted again through this blocking space 2634. Thus, the impurities or rainwater entering the labyrinth-shaped channel 264 are blocked and intercepted relatively completely, and finally the air flows into the cabinet 2 for heat exchange to achieve heat dissipation.

[0080] Both sides of the flow guide plate 263 are respectively perpendicular to the opening of the installation frame 261 and the air inlet 9, so that the inlet and outlet of the labyrinth-shaped channel 264 formed between two adjacent flow guide plates 263 are rectangular, in order to obtain the maximum air intake volume, and it can also make the air entering the labyrinth-shaped channel 264 contact the convex surface of the blocking portion 2631 at a certain angle, which is beneficial to preventing impurities or rainwater in the air from entering the cabinet 2;

[0081] On both sides of the deflector 263, portions are respectively folded away from the blocking portion 2631 to form folded edges 2635, and the folded edge 2635 away from the mounting frame 261 extends into the labyrinth channel 264. When the blocking space 2634 blocks impurities or rainwater in the air, the air continues to flow along the concave surface of the blocking portion 2631. At this time, the folded edge 2635 away from the mounting frame 261 extends into the labyrinth channel 264, which can block and intercept the flowing air again to remove impurities or rainwater in the air, further improving the dust and waterproof effects.

[0082] The lower mounting plate 262 is inclined and installed behind the mounting frame 261. The bottom of the deflector 263 is attached to the surface of the lower mounting plate 262. The lower ends of the first baffle plate 2632 and the second baffle plate 2633 do not contact the surface of the lower mounting plate 262, so that the impurities or rainwater blocked by the deflector 263 and the blocking space 2634 can move along the lower mounting plate 262 to the opening of the mounting frame 261 under the influence of gravity and finally fall to the outside, thus avoiding the accumulation of impurities or rainwater in the louver 26.

[0083] On the upper and lower sides of the lower mounting plate 262, upward and downward bends are respectively formed to form a first mounting portion 2621 and a first limit 2622. The first mounting portion 2621 is used for fixedly connecting with the mounting frame 261. The first limit 2622 is located in front of the outlet of the labyrinth channel 264. By means of the first limit 2622, the outlet of the labyrinth channel 264 can be blocked to prevent impurities or rainwater from entering the cabinet 2.

[0084] A number of jacks 2623 are provided on the inclined surface of the lower mounting plate 262. The bottom of the deflector 263 protrudes downward to form an insertion portion 2624. The insertion portion 2624 is in plug-in fit with the jacks 2623. Through the cooperation of the insertion portion 2624 and the jacks 2623, it is beneficial to quickly install the deflector 263 onto the lower mounting plate 262.

[0085] A notch 2625 is provided at the bottom of the insertion portion 2624, and the notch 2625 extends upward along the insertion portion 2624. By providing the notch 2625 at the bottom of the insertion portion 2624, the bottom of the insertion portion 2624 can be divided into two parts, which is beneficial for the deformation and clamping of the insertion portion 2624 in the jacks 2623, thereby stably installing the deflector 263 onto the lower mounting plate 262.

[0086] A top mounting plate 265 is horizontally installed behind the mounting frame 261. The top mounting plate 265 is located at the top of the flow guide plate 263. By installing the top mounting plate 265 at the top of the flow guide plate 263, the top of the flow guide plate 263 can be limited, thereby improving the installation stability of the flow guide plate 263.

[0087] The front and rear sides of the top mounting plate 265 are bent upward and downward respectively to form a second mounting portion 2651 and a second limiting portion 2652. The second mounting portion 2651 is used for fixedly connecting with the mounting frame 261. The second limiting portion 2652 is located in front of the outlet of the labyrinth channel 264. Through the second limiting portion 2652, the outlet of the labyrinth channel 264 can be further blocked to prevent impurities or rainwater from entering the cabinet 2.

[0088] The top of the folded edge 2635 has a fixing portion 2636. The fixing portion 2636 is integrally formed with the folded edge 2635 and is horizontally bent. Through the fixing portion 2636, the flow guide plate 263 and the top mounting plate 265 can be bolted together, further improving the structural stability of the louver 26 structure.

[0089] The air duct plate structure of the present utility model:

[0090] Please refer to Figure 2 and Figure 7 , the air duct plate 4 includes a first plate body 41, a second plate body 42 and a third plate body 43 that are connected end to end in sequence;

[0091] The first plate body 41 is in a stepped shape. By designing the first plate body 41 in a stepped shape, it is beneficial to provide an installation space for the fan 12. The fan 12 is installed above the corner of the first plate body 41 and is located between the first plate body 41 and the partition 3, so that the electrical components installed inside the cabinet 2 are more reasonable and compact, reducing the volume of the equipment;

[0092] The second plate body 42 includes a first vertical portion 421 connected to the first plate body 41. The first vertical portion 421 is fixedly connected to the first plate body 41 and forms a stepped structure at the connection, which is beneficial to improving the overall structural strength of the air duct plate 4; it also includes a transverse portion 422 connected to the third plate body 43. The transverse portion 422 is used for installing electrical components, so that the air entering the cabinet 2 through the air inlet 9 can directly blow to the main device 28 for heat dissipation. The transverse portion 422 is fixedly connected to or integrally formed with the first vertical portion 421;

[0093] The third plate body 43 includes a bent portion 431 fixedly connected to the transverse portion 422. The bent portion 431 faces the air inlet 9. Through the bent portion 431, the air entering the cabinet 2 can be guided so that the air flows to the electrical components installed on the transverse portion 422 for heat dissipation; and a second vertical portion 432 fixedly connected to the bottom wall of the cabinet 2. The second vertical portion 432 is integrally formed with the bent portion 431.

[0094] An installation rack 16 for installing electrical components is fixedly connected to the bottom wall of the cabinet 2. The installation rack 16 is located above the air outlet 8. By installing the main device 28 on the installation rack 16 and within the air duct 11, the heat generated by the main device 28 can be carried away when the gas flows and discharged downward from the air outlet 8;

[0095] Secondly, the structure similar to the shape of "factory" formed by connecting the second plate body 42 and the third plate body 43 can provide an installation space for installing the main device 28, and make the electrical components installed inside the cabinet 2 more reasonable and compact, optimizing the space utilization rate of the accommodation cavity 1.

[0096] Finally, it should be noted that the above embodiments are only the preferred embodiments of the present invention, and the scope of protection of the present invention cannot be limited thereby. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention fall within the scope of protection required by the present invention.

Claims

1. An outdoor frequency converter, comprising a cabinet (2) having a receiving chamber (1), characterized in that: The accommodating chamber (1) is provided with a partition plate (3) and an air duct plate (4) to vertically divide the accommodating chamber (1) into a front chamber (5), a middle chamber (6) and a rear chamber (7); The bottom and side of the cabinet (2) are respectively provided with an air outlet (8) and an air inlet (9) connected to the middle cabin (6) and the rear cabin (7); the top side of the air duct plate (4) is provided with a through hole (10) connected to the middle cabin (6) and the rear cabin (7); and a zigzag air duct (11) is formed between the air inlet (9), the through hole (10) and the air outlet (8); a fan (12) is installed in the air duct (11); It also includes a main device (28) installed in the rear cabin (7), a heat dissipation device (29) installed in the middle cabin (6), and an auxiliary device (30) installed in the front cabin (5).

2. The outdoor inverter according to claim 1, characterized in that: A support plate (13) is installed on the rear side wall of the cabinet (2) and the opposite surface of the air duct plate (4), the installation height of the support plate (13) is greater than the setting height of the air inlet (9), and the two ends of the support plate (13) are respectively in contact with the left and right side walls of the cabinet (2); Along the depth direction of the support plate (13), side plates (14) are respectively and vertically fixedly connected to the two support plates (13), and the two ends of the two side plates (14) are respectively and commonly connected to end frames (15); Along the depth direction of the side plate (14), a plurality of intermediate plates (17) are installed between the two end frames (15), and a plurality of heat dissipation aluminum tubes (18) are commonly penetrated through the plurality of intermediate plates (17).

3. The outdoor inverter according to claim 2, characterized in that: The air duct plate (4) and the partition plate (3) are respectively provided with side air ports (19), and a wind box (20) is commonly provided and fixedly connected to the two side air ports (19), and the air outlet ends of the plurality of heat dissipation aluminum tubes (18) are all extended into the air inlet of the wind box (20), and the air outlet of the wind box (20) is communicated with the front cabin (5); An equipment box (21) is installed outside the cabinet (2), and air holes (22) and circulation holes (23) are respectively opened on the box wall of the equipment box (21). The equipment box (21) is connected to the rear compartment (7) and the front compartment (5) through the air holes (22) and the circulation holes (23), and a fan (24) is installed at the air hole (22).

4. The outdoor inverter according to claim 3, characterized in that: The end frame (15) close to the equipment box (21) is concave, the bottom wall of the end frame (15) faces the equipment box (21), and the air inlet end of the heat dissipation aluminum tube (18) extends into the concave space of the end frame (15).

5. The outdoor inverter according to claim 1 or 4, characterized in that: A dustproof net (25) is installed at the air outlet (8), and a shutter (26) is installed at the air inlet (9), wherein the shutter (26) comprises a mounting frame (261) fixedly connected to the outside of the air inlet (9), and a lower mounting plate (262) is fixedly connected to the rear of the mounting frame (261); A plurality of guide plates (263) are evenly distributed on the lower mounting plate (262) along the depth direction of the lower mounting plate (262), and a side of the guide plate (263) away from the mounting frame (261) passes through the air inlet (9) and extends into the cabinet (2); The middle portion of the guide plate (263) is bent outward and protrudes to form a blocking portion (2631), and two adjacent guide plates (263) are enclosed to form a maze-like channel (264).

6. The outdoor inverter according to claim 5, characterized in that: The outer convex surface of the blocking portion (2631) faces the inlet and outlet of the labyrinth-shaped channel (264), and the outer convex surface and the inner concave surface of two adjacent guide plates (263) are respectively fixedly connected with a first baffle (2632) and a second baffle (2633); The first baffle (2632) and the second baffle (2633) respectively surround the outer convex surface of the guide plate (263) and the inner concave surface of the guide plate (263) to form a blocking space (513), and the opening of the blocking space (513) faces the entrance of the labyrinth-shaped channel (264).

7. The outdoor inverter according to claim 5 or 6, characterized in that: The two side portions of the guide plate (263) are respectively perpendicular to the opening of the installation frame (261) and the air inlet (9), and the two side portions of the guide plate (263) are respectively folded toward a side away from the blocking portion (2631) to form a folded edge (2635), and the folded edge (2635) away from the installation frame (261) extends into the maze-like channel (264).

8. The outdoor inverter according to any one of claims 5 to 7, characterized in that: The lower mounting plate (262) is obliquely mounted behind the mounting frame (261), and the bottom of the guide plate (263) is in contact with the surface of the lower mounting plate (262); The upper and lower sides of the lower mounting plate (262) are bent upward and downward respectively to form a first mounting portion (2621) and a first limiting portion (2622), wherein the first mounting portion (2621) is used for being fixedly connected to the mounting frame (261), and the first limiting portion (2622) is located in front of the exit of the labyrinth-shaped passage (264).

9. The outdoor inverter according to any one of claims 1 to 8, characterized in that: The air duct plate (4) comprises a first plate body (41), a second plate body (42) and a third plate body (43) which are connected end to end in sequence; The first plate body (41) is in a stepped shape, and the fan (12) is installed above the corner of the first plate body (41) and is located between the first plate body (41) and the partition (3); The second plate body (42) comprises a first vertical portion (421) connected to the first plate body (41), and a transverse portion (422) connected to the third plate body (43), wherein the transverse portion (422) is used to install the main component (28), and the transverse portion (422) is fixedly connected to or integrally formed with the first vertical portion (421); The third plate body (43) comprises a bent portion (431) fixedly connected to the transverse portion (422), the bent portion (431) facing the air inlet (9), and a second vertical portion (432) fixedly connected to the bottom wall of the cabinet (2), the second vertical portion (432) and the bent portion (431) being integrally formed.

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