Inverter

Abstract

The present application belongs to the technical field of inverters. Disclosed is an inverter, the inverter comprising a housing, a circuit board, an air duct cover and a fan, wherein the housing has an accommodating cavity, an air intake hole and an air output hole, the accommodating cavity being in communication with the outside of the housing by means of the air intake hole and the air output hole; the circuit board is provided with a power device; the air duct cover is arranged in the accommodating cavity, and the air duct cover and the circuit board jointly enclose a heat dissipation channel; the fan is mounted in the accommodating cavity; the heat dissipation channel has an air inlet in communication with the air intake hole, and an air outlet in communication with the air output hole; the power device is located in the heat dissipation channel; and the air intake hole, the heat dissipation channel and the air output hole are sequentially in communication to form an air duct, and the fan is located on the air duct. The present application can improve the heat dissipation efficiency and prolong the service life of the inverter.

Description

Inverter Technical Field

[0001] This application relates to the technical field of converters, and more particularly to an inverter. Background Technology

[0002] An inverter is a converter that transforms direct current (DC) energy (from batteries or storage batteries) into constant frequency and voltage alternating current (AC) (typically 220V, 50Hz sine wave). Currently, inverters mainly consist of a housing and a power circuit board installed inside. The power circuit board houses power devices and other electronic components. Because the power devices generate a significant amount of heat, existing housings typically have air inlets and outlets. A fan draws cooling air from outside the housing through the inlets, passes through the power devices, and finally flows out through the outlets, carrying away the heat from the power devices. However, this cooling method results in relatively dispersed airflow within the housing, leading to a slower temperature drop in the power devices and lower inverter cooling efficiency, thus affecting the inverter's lifespan.

[0003] Summary of the Invention

[0004] The purpose of this application is to provide an inverter that can improve heat dissipation efficiency and service life.

[0005] To achieve the above objectives, this application adopts the following technical solution:

[0006] An inverter, comprising:

[0007] The box body has a receiving cavity, an air inlet, and an air outlet; the receiving cavity is connected to the outside of the box body through the air inlet and the air outlet;

[0008] The circuit board contains power devices;

[0009] An air duct cover is disposed within the receiving cavity and together with the circuit board forms a heat dissipation channel;

[0010] as well as

[0011] The fan is installed inside the receiving cavity;

[0012] The heat dissipation channel extends from top to bottom, and the heat dissipation channel has an air inlet communicating with the air inlet and an air outlet communicating with the air outlet. The power device is located in the heat dissipation channel. The air inlet, the heat dissipation channel, and the air outlet are connected in sequence to form an air duct. The fan is located on the air duct.

[0013] Optionally, the circuit board is equipped with a heat sink, and the air duct cover is connected to the heat sink to further improve heat dissipation efficiency.

[0014] Optionally, the air duct cover is formed by bending a plastic sheet.

[0015] Optionally, the duct cover has a folded edge, which is threadedly connected to the radiator via threaded fasteners to enable quick installation of the duct cover.

[0016] Optionally, the heat sink includes a heat sink body and a plurality of heat sink fins; the plurality of heat sink fins are all parallel to the circuit board, the heat sink body has a heat sink side facing the heat sink channel, the plurality of heat sink fins are spaced apart on the heat sink side along a direction away from the circuit board, and the folded edge is threadedly connected to the heat sink body of the heat sink by a threaded fastener.

[0017] Optionally, the air inlet is located above the air outlet, and the fan is located at the air outlet and blows air from top to bottom.

[0018] Optionally, the housing has a first side, a second side, and a third side connected in sequence; the first side and the third side are arranged opposite to each other, and both the first side and the third side are provided with air inlets, the second side is provided with air outlets, and the air inlet of the heat dissipation channel is located between the two air inlets to reduce dust concentration.

[0019] Optionally, the air inlet is located at the end of the first side and the third side away from the second side, thereby increasing the length of the heat dissipation channel.

[0020] Optionally, a bracket is provided inside the receiving cavity, and the fan is installed at the air outlet through the bracket to achieve the installation and fixation of the fan.

[0021] Optionally, the inverter further includes a communication module and a wiring assembly; the bracket divides the housing cavity into an air inlet area and an air outlet area, the air duct cover is installed in the air inlet area, the air inlet of the heat dissipation channel is located in the air inlet area, the air outlet of the heat dissipation channel is connected to the air outlet area, the air outlet area is connected to the outside of the housing through the air outlet hole, the communication module is located in the air outlet area, the wiring assembly is located in the air inlet area and outside the heat dissipation channel, and the communication module is electrically connected to the circuit board through the wiring assembly to avoid the heat generated by the power devices causing the communication module to age and be damaged.

[0022] Optionally, the air outlet is opposite to the air outlet of the heat dissipation channel, the box body also has a side air vent, the air outlet area is connected to the outside of the box body through the side air vent, and the communication module is located at the side air vent to realize heat dissipation of the communication module.

[0023] Optionally, the housing includes a shell and a cover; the shell has a receiving groove, the air inlet and the air outlet are both opened in the shell and communicate with the receiving groove, the circuit board, the power device, the duct cover, the fan, and the bracket are all disposed in the receiving groove, the cover is installed on the shell and covers the opening of the receiving groove, and the cover and the inner wall of the receiving groove together form the receiving cavity, which facilitates the installation and maintenance of the circuit board, power device, duct cover, fan, and bracket.

[0024] Optionally, the cover includes a main cover and a hinged cover; the groove of the receiving slot includes a first groove communicating with the air inlet area and a second groove communicating with the air outlet area;

[0025] The main cover covers the first slot, and the flip cover covers the second slot. The main cover and the flip cover are movably connected to facilitate the maintenance of the inverter.

[0026] Optionally, the box body is equipped with a dustproof net that covers the air inlet to prevent dust and small particles from entering the interior of the box body through the air inlet.

[0027] Optionally, the air duct cover is formed by bending sheet material to reduce costs.

[0028] Optionally, a display screen is provided on the outside of the box, and the display screen is electrically connected to the circuit board for easy monitoring.

[0029] Optionally, the outer side of the box is also provided with control instruction stickers adapted to the display screen for user convenience.

[0030] Optionally, the housing is further provided with a wiring hole, and the receiving cavity is connected to the outside of the housing through the wiring hole. A protective coil is installed at the wiring hole to protect the cable.

[0031] The beneficial effects of this application are as follows:

[0032] The inverter of this application features a duct cover that, together with the circuit board, forms a heat dissipation channel. The power devices are housed within this channel. When cooling air from outside the enclosure enters the enclosure, it can be concentrated into the heat dissipation channel, allowing the cooling air to effectively dissipate heat from the power devices within the channel. This results in a rapid decrease in the temperature of the power devices. The cooling air then carries away the heat generated by the power devices and exhausts it to the outside of the enclosure through the air outlet, thereby improving the inverter's heat dissipation efficiency and lifespan. Attached Figure Description

[0033] The present application will now be described in further detail with reference to the accompanying drawings and embodiments.

[0034] Figure 1 is a schematic diagram of the inverter structure;

[0035] Figure 2 is an exploded view of the inverter;

[0036] Figure 3 is a schematic diagram of airflow in the inverter.

[0037] Figure 4 shows the front view of the inverter;

[0038] Figure 5 is a side view of the inverter;

[0039] Figure 6 is a bottom view of the inverter;

[0040] Figure 7 shows a schematic diagram of the assembly of the circuit board and the air duct cover;

[0041] Figure 8 is a schematic diagram of the assembly of the housing, circuit board and air duct cover;

[0042] Figure 9 is a schematic diagram from another perspective of Figure 8.

[0043] Explanation of reference numerals in the attached figures:

[0044] 11. Housing; 12. Circuit board; 13. Power device; 14. Air duct cover; 15. Fan; 16. Heat sink; 17. Bracket; 18. Communication module; 19. Cable bundle; 20. Dustproof mesh; 21. Display screen; 22. Control indicator sticker; 23. Box frame; 24. Heat dissipation channel; 25. Wire guard;

[0045] 111. Shell; 112. Cover; 113. Air inlet; 114. Air outlet; 115. Side air vent; 116. Air inlet area; 117. Air outlet area;

[0046] 1111, First side portion; 1112, Second side portion; 1113, Third side portion; 1114, Fourth side portion; 1115, Receiving groove;

[0047] 1121. Main cover; 1122. Flip cover; 1123. Mounting hole;

[0048] 161. Heat sink; 162. Heat sink body;

[0049] 241. Air inlet; 242. Air outlet. Detailed Implementation

[0050] To make the technical problems solved by this application, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of this application will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0051] In the description of this application, unless otherwise expressly specified and limited, the terms "connected," "fixed," "linked," "communicated," "abutting," "clamping," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0052] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0053] In the description herein, it should be understood that the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings, and are used only for ease of description and simplification of operation. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used merely for descriptive distinction and have no special meaning.

[0054] In the description of this specification, references to terms such as "an embodiment," "example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0055] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0056] Unless otherwise stated or defined, the term “and / or” as used in this application includes any and all combinations of one or more of the associated listed items.

[0057] For ease of description, unless otherwise stated, the left-right direction mentioned below is consistent with the left-right direction of Figure 3 itself, the up-down direction mentioned below is consistent with the up-down direction of Figure 3 itself, and the front-back direction mentioned below is consistent with the up-down direction of Figure 6 itself.

[0058] In related technologies, converters can convert direct current (DC) to alternating current (AC), or vice versa. The inverter within the converter is primarily used to convert DC to AC.

[0059] An inverter mainly consists of a housing and a power circuit board installed inside the housing. The power circuit board houses electronic components such as power devices and integrates circuits including input filtering, DC / DC MPPT, DC / AC inverter, and output filtering. During inverter operation, the power devices generate significant power and heat. Existing inverter housings typically have air inlets and outlets. To facilitate wiring of the communication module, after installation, the communication module should be placed near the bottom of the housing. The air inlets and outlets are located on the left and right sides of the housing to achieve convection. A fan is installed at the outlet to draw cooling air from outside the housing into the housing through the inlet. This cooling air passes over the power devices, carrying away heat. Finally, the heat is carried away by the cooling air and flows out through the outlet. However, in practical use, the inventors discovered that after the cooling air enters the housing, the airflow direction is multi-directional, and the air volume is relatively dispersed. Only a small portion passes through the power devices and acts on them, while the remaining cooling air either does not pass through the power devices or passes through some electronic components with low heat generation before flowing out of the housing through the air outlet. This results in a slower temperature drop for the power devices. In existing technologies, the airflow is generally increased by enlarging the air inlet and outlet, but this method increases the risk of dust entering the housing. Some technologies use larger and more powerful fans to improve heat dissipation efficiency, but this increases the cost and size of the inverter. Furthermore, existing technologies generally use left-right convection for heat dissipation. Because hot air rises and cold air sinks inside the housing, turbulence can easily occur, hindering heat dissipation. Therefore, the inventors considered changing the left-right convection method to a top-bottom convection method. However, during use, they also discovered that when the air inlet and outlet were located on the top and bottom sides of the casing for convection cooling, although the fan allowed air to flow downwards and carry away heat from the heat-generating components, turbulence still existed inside the casing. This prevented the cool air from concentrating on cooling the heat-generating components, resulting in unsatisfactory internal heat dissipation for the inverter. This led to higher quality requirements for the internal components and increased production costs. Furthermore, when the inverter's heat dissipation efficiency was low, excessive heat accumulated inside the inverter after prolonged operation, causing the temperature to rise too quickly. This could easily damage circuit boards, power devices, or other electronic components, affecting the inverter's lifespan and leading to unstable inverter quality.

[0060] To address the problems in the aforementioned related technologies, this application provides an inverter that forms a heat dissipation channel for housing power devices by setting up a duct cover. After cold air enters the housing, it can concentrate heat dissipation on the power devices along the heat dissipation channel. The cooling air carries away the heat generated by the power devices and discharges it downwards from the air outlet to the outside of the housing, thereby improving the heat dissipation efficiency of the inverter, preventing the inverter from being damaged due to excessive temperature, and extending the service life of the inverter.

[0061] As shown in Figures 1 to 8, the inverter provided in this application includes a housing 11, a circuit board 12, a duct cover 14, and a fan 15.

[0062] The housing 11 has a receiving cavity, an air inlet 113, and an air outlet 114. The receiving cavity is used to house components such as the circuit board 12, the air duct cover 14, and the fan 15. The receiving cavity is connected to the outside of the housing 11 through the air inlet 113 and the air outlet 114. The fan 15 is installed inside the receiving cavity. When the fan 15 is started, cooling air from outside the housing 11 can enter through the air inlet 113 and then be discharged to the outside of the housing 11 through the air outlet 114. The circuit board 12 is equipped with power devices 13. The circuit board 12 is a power PCB board, and there are multiple power devices 13, including inductors, transformers, voltage regulators, etc.

[0063] The air duct cover 14 is disposed in the receiving cavity and together with the circuit board 12 forms a heat dissipation channel 24. The heat dissipation channel 24 has an air inlet 241 communicating with the air inlet 113 and an air outlet 242 communicating with the air outlet 114. The air inlet 241 and the air outlet 242 are both located at the ends of the heat dissipation channel 24, and the air inlet 241 and the air outlet 242 are located at the two ends of the heat dissipation channel 24. The air inlet 113 is close to the upper end of the housing 11, and the air outlet 114 is close to the lower end of the housing 11. The heat dissipation channel 24 extends from top to bottom, so that the flow path of the cooling air is long enough to fully remove the heat generated by the power device 13. Air inlet 113, heat dissipation channel, and air outlet 114 are sequentially connected to form an air duct. A fan is located on the air duct, which serves as a channel for airflow and guides the airflow. The fan, located on the air duct, provides power for the airflow. The fan 15 can be located at the air inlet 113 or the air outlet 114. The fan 15 can also be located inside the heat dissipation channel 24, at the air inlet 241, or at the air outlet 242. The inside of the heat dissipation channel 24 refers to the area between the air inlet 241 and the air outlet 242. In this embodiment, the fan 15 is located at the air outlet 242 as an example. The frame of the fan 15 is connected to the edge of the air outlet 242.

[0064] When the housing 11 is installed, the heat dissipation channel 24 extends vertically from top to bottom, and the rotation axis of the fan blades 15 extends vertically from top to bottom. The axis of the air inlet 113 and the axis of the air outlet 114 are perpendicular to each other. Thus, when the inverter is installed and in use, after the housing is installed, the axis of the air outlet 114 extends vertically, the axis of the air inlet 113 extends horizontally, the axis of the fan blades 15 extends vertically from top to bottom, the fan 15 blows air downwards, the air outlet 114 extends along the axis of the fan blades, and the air inlet 113 extends radially along the fan blades. That is, the air inlet 113 is located on the side of the housing 11, and the air outlet 114 is located on the bottom surface of the housing 11. This can prevent dust from falling from top to bottom into the housing cavity of the housing 11, reducing the risk of dust falling into the housing from top to bottom. The upper end of the heat dissipation channel 24 has an air inlet 241 communicating with the air inlet 113, and the lower end of the heat dissipation channel 24 has an air outlet 242 communicating with the air outlet 114. The air inlet 241 is opposite to the air inlet 113 of the housing 11, and the air outlet 242 is opposite to the air outlet 114 of the housing 11. When the air duct cover 14 is installed inside the housing 11, it covers all the power devices 13, so that the power devices 13 are located inside the heat dissipation channel 24. The fan 15 is located at the air inlet 241 or the air outlet 242. The power generated by the fan 15 allows the cool air to flow sequentially along the air inlet 113, the air inlet 241, the heat dissipation channel 24, the air outlet 242, and the air outlet 114. When the inverter is operating, by starting the fan 15, cooling air from outside the housing 11 enters the housing cavity through the air inlet 113 and is then concentrated into the heat dissipation channel 24 through the air inlet 241. This prevents some cooling air from flowing outside the heat dissipation channel 24, allowing the cooling air to focus on the power devices 13. After entering the heat dissipation channel 24, the cooling air only passes through the power devices 13 and flows to the air outlet 242 of the heat dissipation channel 24. This effectively removes heat from the power devices 13 and quickly exhausts it to the outside of the housing 11, preventing hot cooling air from repeatedly flowing inside the housing 11 and affecting the operation of other components. Thus, compared to existing inverters, the inverter in this embodiment has higher heat dissipation efficiency, a longer service life, and better quality.

[0065] Optionally, the circuit board 12 is equipped with a heat sink 16. A portion of the air duct cover 14 abuts against the circuit board 12, and a portion of the air duct cover 14 is connected to the heat sink 16. Specifically, the heat sink 16 includes heat sink fins 161, and the air duct cover 14 is connected to the heat sink fins of the heat sink 16 by rivets, which is convenient to install, efficient, and low in cost. Some of the heat generated by the power device 13 is conducted to the air duct cover 14 through the air, and the air duct cover 14 will accumulate a certain amount of heat. The air duct cover 14 and the heat sink 16 are connected or abut against each other. Utilizing the thermal conductivity between the air duct cover 14 and the heat sink 16, the heat on the air duct cover 14 is conducted to the heat sink 16 through the air duct cover 14, and the heat sink 16 is used to achieve rapid heat dissipation of the power device 13.

[0066] Furthermore, the heat sink 16 also includes a heat sink body 162 with heat dissipation sides. Multiple heat sinks 161 are integrally formed with the heat sink body 162. These heat sinks 161 are spaced apart on one side of the heat sink body 162 along a direction away from the circuit board 12. All heat sinks 161 are parallel to the circuit board 12, with their heat dissipation sides facing the heat dissipation channel 24, ensuring that all heat sinks 161 are located within the heat dissipation channel 24, effectively dissipating heat within the channel 24. The heat sink body 162 is mounted on the circuit board 12 by bolts or screws, and the air duct cover 14 is mounted on the heat sink body 162 by bolts or screws.

[0067] Optionally, there are multiple radiators 16, which are arranged at intervals along the edge of the air duct cover.

[0068] In one embodiment, the housing 11 has a first side portion 1111, a second side portion 1112, a third side portion 1113, and a fourth side portion 1114 connected in sequence. The first side portion 1111 and the third side portion 1113 are arranged opposite to each other, and the second side portion 1112 and the fourth side portion 1114 are arranged opposite to each other. Both the first side portion 1111 and the third side portion 1113 have air inlets 113, and the second side portion 1112 has an air outlet 114. The air inlet 241 of the heat dissipation channel 24 is located between the two air inlets 113. For example, in FIG3, the housing 11 is cuboid in shape, the fourth side portion 1114 is located on the upper side of the housing 11, the second side portion 1112 is located on the lower side of the housing 11, the first side portion 1111 is located on the left side of the housing 11, and the third side portion 1113 is located on the right side of the housing 11. The air inlets 113 on the first side 1111 and the third side 1113 extend horizontally from left to right, with the air inlets 113 on the first side 1111 and the third side 1113 facing each other. The second side 1112 is located below the first side 1111 and the third side 1113. After the box body 11 is installed, the second side 1112 forms the bottom of the box body 11, and the first side 1111 and the third side 1113 are located on the left and right sides of the box body 11, respectively. Cooling air from outside the box body 11 enters the box body 11 horizontally, and the air inlets 113 on the first side 1111 and the third side 1113 both blow air into the receiving cavity of the box body. The heat dissipation channel 24 and the air outlet 114 extend from top to bottom. The air inlet 241 is located at the upper end of the heat dissipation channel 24. The left and right sides of the heat dissipation channel 24 are closed. Cooling air entering from the air inlet 113 on the first side 1111 and cooling air entering from the air inlet 113 on the third side 1113 converge at the air inlet 241 of the heat dissipation channel 24 and then flow downwards, increasing the flow velocity of the heat dissipation channel 24. That is, the flow trajectory of the cooling air is an inverted L-shape. Compared with the existing method of setting the air inlet 113 and the air outlet 114 on the upper and lower sides of the housing 11 to form a convection flow, this method allows the air to flow into the heat dissipation channel 24 more concentratedly and quickly, increasing the flow velocity of the heat dissipation channel 24. In addition, the inventors found that when the air inlet and air outlet are set on the upper and lower sides of the housing, dust is more likely to fall into the housing, and dust will affect the heat dissipation of the heat-generating device. After the housing of this application is installed, the axis of the air inlet is set horizontally and the axis of the air outlet is set vertically. When the fan is started, the air inlet can achieve horizontal air intake, so that the flow trajectory of the cooling air of this application can prevent dust from falling directly from the top of the housing 11 onto the components inside the housing 11, reducing dust concentration and playing a certain dust filtration effect, thus avoiding the adverse effects caused by dust accumulation on the electronic components inside the housing 11.The cooling air can flow effectively along the set trajectory, and the cooling air can be concentrated to cool the power device 13 in the heat dissipation channel 24. The air volume is larger and the air efficiency level is improved, which can quickly reduce the temperature of the power device 13, thereby improving the performance of the inverter, meeting the design requirements of the inverter, and also reducing the heat power consumption of the inverter.

[0069] Optionally, the air inlet 113 is located at the end of the first side 1111 and the third side 1113 away from the second side 1112, so that the heat dissipation channel is longer and the heat dissipation efficiency is improved.

[0070] Furthermore, a bracket 17 is provided inside the receiving cavity, and the fan 15 is mounted at the air outlet 242 via the bracket 17. The bracket 17 is connected to the housing 11, and supports the fan 15. Multiple fans 15 can be installed, arranged sequentially from left to right, covering the air outlet 242, which increases the flow rate of cooling air and improves the cooling effect.

[0071] In one embodiment, the inverter further includes a communication module 18 and a cable assembly 19. A bracket 17 divides the housing into an air inlet zone 116 and an air outlet zone 117. The circuit board 12, power devices 13, and air duct cover 14 are all mounted in the air inlet zone 116. The air inlet 241 of the heat dissipation channel 24 is located in the air inlet zone 116, and the air outlet 242 of the heat dissipation channel 24 communicates with the air outlet zone 117. The air outlet zone 117 communicates with the outside of the housing 11 through the air outlet 114. The communication module 18 is located in the air outlet zone 117, and the cable assembly 19 is located in the air inlet zone 116 and outside the heat dissipation channel 24. The communication module 18 is electrically connected to the circuit board 12 through the cable assembly 19. Specifically, the communication module 18 includes a communication PCB board and several communication interfaces mounted on the communication PCB board. The cable assembly 19 includes several communication cables. The communication cables of the cable assembly 19 are electrically connected to the communication interfaces through connectors. Installing the communication module 18 in the air outlet area 117 can keep it away from the power device 13 in the air inlet area 116, thus avoiding the heat generated by the power device 13 from causing the communication module 18 to age and be damaged.

[0072] Optionally, the air outlet 114 is opposite to the air outlet 242 of the heat dissipation channel 24, and the air outlet of the fan 15 faces the air outlet 114. The housing 11 also has a side air outlet 115, which is located to the side of the air outlet 114 and is not opposite to the air outlet 242. Cooling air carrying heat can flow quickly from the air outlet 242 to the air outlet 114, preventing the cooling air carrying heat from flowing to other areas of the air outlet area 117 and causing the communication module 18 to age and be damaged. The side air outlet 115 is located on the left side of the housing 11, and the air outlet area 117 is connected to the outside of the housing 11 through the side air outlet 115. The communication module 18 is located at the side air outlet 115, and the side air outlet 115 provides heat dissipation for the communication module 18. For example, side air vents 115 can be provided on the first side 1111 and the third side 1113 of the housing 11. The communication module 18 is close to one of the side air vents 115. When the cooling air passing through the heat dissipation channel 24 passes through the air outlet 242 and the air outlet 114 to the outside of the housing 11, the air flow at the air outlet 242 and the air outlet 114 is fast and the air pressure is low. The air outside the housing 11 can enter the air outlet area 117 through the side air vent 115 to carry away the heat generated by the communication module 18, and then pass through the air outlet 242 and the air outlet 114 to the outside of the housing 11.

[0073] In one embodiment, the housing 11 includes a shell 111 and a cover 112. The shell 111 has a receiving groove 1115, and an air inlet 113 and an air outlet 114 are both opened in the shell 111 and communicate with the receiving groove 1115. The circuit board 12, power device 13, air duct cover 14, fan 15, and bracket 17 are all disposed in the receiving groove 1115. The cover 112 is installed on the shell 111 and covers the opening of the receiving groove 1115. The shell 111 and the cover 112 are detachably or rotatably connected. The cover 112 and the inner wall of the receiving groove 1115 together form a receiving cavity. By opening the cover 112, the circuit board 12, power device 13, air duct cover 14, fan 15, and bracket 17 can be disposed in the receiving groove 1115. The circuit board 12, power device 13, air duct cover 14, fan 15, and bracket 17 disposed in the receiving groove 1115 can also be inspected and repaired.

[0074] In one embodiment, the cover 112 includes a main cover 1121 and a hinged cover 1122. The slot of the receiving groove 1115 includes a first slot communicating with the air inlet area 116 and a second slot communicating with the air outlet area 117. The first slot is located in the area between the fourth side portion 1114 and the bracket 17, and the second slot is located in the area between the second side portion 1112 and the bracket 17. The main cover 1121 covers the first slot, and the hinged cover 1122 covers the second slot. By dividing the cover 112 into two parts, the main cover 1121 and the hinged cover 1122, the air inlet area 116 and the air outlet area 117 are respectively shielded. The main cover 1121 and the flip cover 1122 are movably connected. The main cover 1121 can be rotatably connected to the flip cover 1122, or it can be slidably connected, or it can be detachably connected, so that the main cover 1121 and the flip cover 1122 can be opened separately. When the circuit board 12, the air duct cover 14, the power device 13, and the fan 15 need to be maintained, the main cover 1121 can be opened separately. When the communication module 18 needs to be maintained, the main cover 1121 can be opened separately, which facilitates the maintenance of the inverter.

[0075] In one embodiment, the housing 11 is equipped with a dustproof net 20, which covers the air inlet 113 to prevent dust and small particles from entering the interior of the housing 11 through the air inlet 113.

[0076] In one embodiment, the duct cover 14 is formed by bending a sheet material. This effectively reduces the manufacturing cost of the duct cover 14. The duct cover 14 can be formed by bending a single sheet material or by bending multiple sheets material. The multiple sheets are bent separately and then connected by screws. The sheets are bent to form folded edges or baffles. The folded edges can be used to connect the circuit board 12 or the heat sink 16, or to connect adjacent sheets to each other. When the folded edges are used to connect the heat sink 16, they are threadedly connected to the heat dissipation body 162 of the heat sink 16 by screws or other threaded fasteners, facilitating the installation of the duct cover 14. The baffles are used to shield the areas on both sides of the power device 13, thereby forming a heat dissipation channel 24.

[0077] Optionally, the duct cover 14 can be formed by bending a plastic sheet or plate, which can improve the electromagnetic compatibility (EMC) and insulation of the duct cover 14. For example, the material of the duct cover 14 is polycarbonate (PC) sheet. Polycarbonate not only has good flame retardant and insulation properties, but is also easy to process and manufacture, reducing the production cost of the duct cover 14.

[0078] In one embodiment, a display screen 21 is provided on the outside of the housing 11, and the display screen 21 is electrically connected to the circuit board 12. Specifically, a mounting hole 1123 is provided on the cover 112, and a portion of the display screen 21 is fitted into the mounting hole 1123, with the display area and control area of ​​the display screen 21 facing outwards. The display screen 21 can display the status and data of the inverter in real time, including but not limited to the voltage and current of the photovoltaic input, the daily power generation, etc., for easy monitoring.

[0079] Furthermore, the outer side of the housing 11 is also provided with a control instruction sticker 22 adapted to the display screen 21. The display screen 21 has operation buttons. The control instruction sticker 22 can be used to indicate the operation method of the display screen 21, or to indicate the function of the operation buttons on the display screen 21, to facilitate user operation.

[0080] Optionally, the display screen 21 and the control instruction sticker 22 are located on the front side of the box 11, and the box frame 23 is provided on the rear side of the box 11. The inverter can be installed and fixed using the box frame 23.

[0081] In one embodiment, the housing 11 is further provided with multiple wiring holes spaced apart on the second side 1112 of the housing 11. The receiving cavity communicates with the outside of the housing 11 through the wiring holes. A protective coil 25 is installed at the wiring hole. The wiring hole enables electrical connection between the inverter and external electronic components, and the protective coil 25 protects the cables.

[0082] The technical principles of this application have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this application and should not be construed as limiting the scope of protection of this application in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this application without inventive effort, and these embodiments will all fall within the scope of protection of this application.

Claims

1. An inverter, characterized in that, include: The box body (11) has a receiving cavity, an air inlet (113), and an air outlet (114); the receiving cavity is connected to the outside of the box body (11) through the air inlet (113) and the air outlet (114); The circuit board (12) is equipped with power devices (13); A duct cover (14) is disposed in the cavity and together with the circuit board (12) forms a heat dissipation channel (24); as well as A fan (15) is installed inside the receiving cavity; The heat dissipation channel (24) extends from top to bottom. The heat dissipation channel (24) has an air inlet (241) communicating with the air inlet (113) and an air outlet (242) communicating with the air outlet (114). The power device (13) is located in the heat dissipation channel (24). The air inlet (113), the heat dissipation channel (24), and the air outlet (114) are connected in sequence to form an air duct. The fan (15) is located on the air duct.

2. The inverter according to claim 1, characterized in that, The circuit board (12) is provided with a heat sink (16), and the air duct cover (14) is connected to the heat sink (16).

3. The inverter according to claim 2, characterized in that... The air duct cover (14) has a folded edge, which is threadedly connected to the heat sink (16) by a threaded fastener.

4. The inverter according to claim 2, characterized in that... The heat sink (16) includes a heat sink body (162) and a plurality of heat sinks (161); the plurality of heat sinks (161) are all parallel to the circuit board (12), the heat sink body (162) has a heat sink side facing the heat sink channel (24), the plurality of heat sinks (161) are spaced apart on the heat sink side along a direction away from the circuit board (12), and the folded edge is threadedly connected to the heat sink body (162) of the heat sink (16) by a threaded fastener.

5. The inverter according to claim 1, characterized in that, The air inlet (241) is located above the air outlet (242), and the fan (15) is located at the air outlet (242) and blows air from top to bottom.

6. The inverter according to claim 1, characterized in that... The air duct cover (14) is formed by bending a plastic sheet.

7. The inverter according to claim 1, characterized in that, The box body (11) has a first side (1111), a second side (1112), and a third side (1113) connected in sequence; the first side (1111) and the third side (1113) are arranged opposite to each other, and both the first side (1111) and the third side (1113) are provided with air inlets (113), the second side (1112) is provided with air outlets (114), and the air inlet (241) of the heat dissipation channel (24) is located between the two air inlets (113).

8. The inverter according to claim 7, characterized in that, The air inlet (113) is located on the first side (1111) and the third side (1113) at the end away from the second side (1112).

9. The inverter according to claim 1, characterized in that, The cavity is provided with a bracket (17), and the fan (15) is installed at the air outlet (242) through the bracket (17).

10. The inverter according to claim 9, characterized in that, It also includes a communication module (18) and a cable assembly (19); the bracket (17) divides the receiving cavity into an air inlet area (116) and an air outlet area (117), the air duct cover (14) is installed in the air inlet area (116), the air inlet (241) of the heat dissipation channel (24) is located in the air inlet area (116), the air outlet (242) of the heat dissipation channel (24) is connected to the air outlet area (117), the air outlet area (117) is connected to the outside of the box (11) through the air outlet hole (114), the communication module (18) is located in the air outlet area (117), the cable assembly (19) is located in the air inlet area (116) and outside the heat dissipation channel (24), and the communication module (18) is electrically connected to the circuit board (12) through the cable assembly (19).

11. The inverter according to claim 10, characterized in that, The air outlet (114) is opposite to the air outlet (242) of the heat dissipation channel (24). The box body (11) also has a side air outlet (115). The air outlet area (117) is connected to the outside of the box body (11) through the side air outlet (115). The communication module (18) is located at the side air outlet (115).

12. The inverter according to claim 9, characterized in that, The box body (11) includes a shell (111) and a cover (112); the shell (111) has a receiving groove (1115), the air inlet (113) and the air outlet (114) are both opened in the shell (111) and are both connected to the receiving groove (1115), the circuit board (12), the power device (13), the air duct cover (14), the fan (15) and the bracket (17) are all disposed in the receiving groove (1115), the cover (112) is installed on the shell (111) and covers the opening of the receiving groove (1115), and the cover (112) and the inner wall of the receiving groove (1115) together enclose the receiving cavity.

13. The inverter according to claim 12, characterized in that, The cover (112) includes a main cover (1121) and a hinged cover (1122); the groove of the receiving slot (1115) includes a first groove communicating with the air inlet area (116) and a second groove communicating with the air outlet area (117); The main cover (1121) covers the first slot, and the flip cover (1122) covers the second slot. The main cover (1121) and the flip cover (1122) are movably connected.

14. The inverter according to any one of claims 1 to 13, characterized in that, The box (11) is equipped with a dustproof net (20), which covers the air inlet (113).

15. The inverter according to any one of claims 1 to 13, characterized in that, The air duct cover (14) is formed by bending sheet material.

16. The inverter according to any one of claims 1 to 13, characterized in that, The outer side of the box (11) is provided with a display screen (21), and the display screen (21) is electrically connected to the circuit board (12).

17. The inverter according to claim 16, characterized in that, The outer side of the box (11) is also provided with an operation instruction sticker (22) that is compatible with the display screen (21).

18. The inverter according to any one of claims 1 to 13, characterized in that, The box (11) is also provided with a wiring hole, and the receiving cavity is connected to the outside of the box (11) through the wiring hole. A protective coil (25) is installed at the wiring hole.

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