Heat dissipation structure, power conversion equipment and photovoltaic system

Abstract

The utility model discloses a heat radiation structure, a power conversion device and a photovoltaic system, the heat radiation structure comprises an air duct rear shell and an air outlet assembly, the air duct rear shell is arranged on the back side of an electrical cabinet; the air outlet assembly is arranged at an air outlet opening of the air duct rear shell and comprises an air outlet filtering part and an air outlet guiding part, the air outlet filtering part is arranged on the air inlet side or the air outlet side of the air outlet guiding part, and the circulation cross section of a single via hole of the air outlet filtering part is smaller than that of a single air outlet of the air outlet guiding part; and the air exhaust direction of the air exhaust port of the air outlet guide part is configured to be inclined from the air duct rear shell to the side where the electrical case is located. According to the heat dissipation structure, airflow in the air duct cavity can be discharged in the preset inclined direction through the air outlet guide part, the requirement for smooth air outlet is met, and meanwhile, large-size foreign matter such as crawlers is prevented from entering the air duct cavity of the air duct rear shell through the air outlet filtering part; therefore, the problem that heat dissipation and electrical performance of the heat dissipation structure of the electrical equipment are affected due to invasion of foreign matters such as crawlers and the like is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of equipment heat dissipation, and more specifically to a heat dissipation structure, a power conversion device and a photovoltaic system. Background Art

[0002] In order to ensure the stable operation of electrical equipment, electrical equipment usually needs to be equipped with a heat dissipation structure. For example, photovoltaic or energy storage power electrical equipment will be equipped with a heat dissipation structure to meet the operation requirements. At present, the most common heat dissipation structure is air cooling. The specific structure is to arrange a fan outside the electrical equipment and use the fan to cool the electrical components inside the electrical equipment.

[0003] Existing electrical equipment such as inverters are generally mounted on a wall or a rack, and their heat dissipation structure is often designed on the back side of the electrical equipment, that is, the side facing the wall. Under this type of heat dissipation structure installation method, in order to ensure smooth air flow, the air outlet is generally designed to be arranged in an inclined manner, that is, the air is tilted away from the installation wall or the mounting rack. However, in order to meet the inclined air flow, it is necessary to design a corresponding inclined air outlet, such as an inclined air outlet grille. However, the opening of the inclined air outlet is often relatively large, which will cause some relatively large reptiles to enter the air duct of the heat dissipation structure, thereby affecting the normal operation of the heat dissipation structure and its internal electrical components.

[0004] In summary, how to solve the problem that the heat dissipation structure of electrical equipment is invaded by foreign objects such as reptiles and thus affects the heat dissipation performance and electrical performance has become a technical problem that needs to be solved urgently by those skilled in the art. Utility Model Content

[0005] In view of this, the utility model provides a heat dissipation structure, a power conversion device and a photovoltaic system to solve the problem that the heat dissipation structure of electrical equipment is invaded by foreign objects such as reptiles, thereby affecting the heat dissipation performance and electrical performance.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A heat dissipation structure, comprising:

[0008] The air duct rear shell is arranged on the back side of the electrical chassis;

[0009] An air outlet assembly is arranged at an air outlet opening on the circumferential shell wall of the air duct rear shell, and includes an air outlet filter portion and an air outlet guide portion. The air outlet filter portion is arranged on the air inlet side or the air outlet side of the air outlet guide portion, and the flow cross-section of a single through hole of the air outlet filter portion is smaller than the flow cross-section of a single air outlet of the air outlet guide portion; the air exhaust direction of the air outlet of the air outlet guide portion is configured to be inclined from the air duct rear shell to the side where the electrical chassis is located.

[0010] Optionally, the air outlet filter portion is configured as a dense mesh component, and the air outlet guide portion is configured as an air outlet grille component.

[0011] Optionally, the dense mesh component and the air outlet grille component are arranged in sequence from inside to outside at the air outlet opening.

[0012] Optionally, the dense mesh component and the air outlet grille component are arranged in a stacked manner;

[0013] And / or, the dense mesh component and the air outlet grille component are an integrated fixed structure or a detachable connection structure.

[0014] Optionally, the dense mesh component is arranged on the outside of the air outlet grille component, and is covered on the air outlet of the air outlet grille component.

[0015] Optionally, the air outlet grille component is configured to be stamped or injection molded;

[0016] And / or, the air outlet grille component includes a substrate and a plurality of convex humps formed on the substrate, the convex humps have an open end and a closed end, and the open end constitutes an air outlet of the air outlet grille component.

[0017] Optionally, the air outlet assembly is arranged on the top of the circumferential shell wall of the air duct rear shell;

[0018] And / or, the air outlet assembly is arranged on the side of the circumferential shell wall of the air duct rear shell;

[0019] And / or, the air outlet assembly is arranged at the bottom of the circumferential shell wall of the air duct rear shell.

[0020] Optionally, it further includes an air inlet assembly disposed at the air inlet opening of the air duct rear shell, the air inlet assembly including:

[0021] A fan module is arranged in the air duct rear shell, and the fan module has an air inlet surface adapted to the air inlet opening;

[0022] The air inlet mesh cover is arranged at the air inlet opening in a manner that it can be detached and assembled from the outer side of the air duct rear shell.

[0023] Optionally, the air inlet grille is detachably disposed on the back plate of the air duct rear shell.

[0024] Optionally, the detachable manner of the air inlet grille and the back plate includes one of three ways, namely, a sliding fit along the surface where the air inlet grille is located, a fastener fixed connection way, and a snap-on connection way, or a combination of at least two of the three ways.

[0025] Optionally, the fan module is arranged on the air duct rear shell in a manner of being pulled and slidably matched along the surface where the air inlet grille is located.

[0026] Optionally, the air inlet mesh cover is arranged on the air inlet surface of the fan module, and can be pulled relative to the air duct rear shell together with the fan module.

[0027] Optionally, the air duct rear shell includes a rear shell body, a top shell wall arranged at the top of the rear shell body, a bottom shell wall arranged at the bottom of the rear shell body, and a side shell wall arranged at the side of the rear shell body, and at least one of the top shell wall, the bottom shell wall and the side shell wall is configured as a ventilation mesh cover structure;

[0028] Wherein, the top shell wall and the rear shell body are configured to be detachably connected;

[0029] And / or, the bottom shell wall and the rear shell body are configured to be detachably connected;

[0030] And / or, the side shell wall and the rear shell body are configured to be detachably connected.

[0031] Compared with the background technology introduction, the above-mentioned heat dissipation structure includes a duct rear shell and an air outlet assembly, wherein the duct rear shell is arranged on the back side of the electrical chassis; the air outlet assembly is arranged at the air outlet opening on the circumferential shell wall of the duct rear shell, and includes an air outlet filter part and an air outlet guide part, the air outlet filter part is arranged on the air inlet side or the air outlet side of the air outlet guide part, and the flow cross-section of a single through hole of the air outlet filter part is smaller than the flow cross-section of a single exhaust port of the air outlet guide part; the exhaust direction of the exhaust port of the air outlet guide part is configured to be inclined from the duct rear shell to the side where the electrical chassis is located. In actual application, the heat dissipation structure has an exhaust direction of the exhaust port of the air outlet guide portion that is configured to be inclined from the rear shell of the air duct toward the side where the electrical chassis is located. Therefore, when the air is discharged from the rear shell of the air duct, the airflow in the air duct cavity can be discharged in a preset inclined direction through the air outlet guide portion, that is, the air outlet direction is away from the mounting cavity wall or mounting frame facing the rear shell of the air duct. Therefore, the requirement of inclined air outlet of the rear shell of the air duct to ensure smooth air outlet can be met. At the same time, since the air outlet filter portion is arranged on the air inlet side or the air outlet side of the air outlet guide portion, and the flow cross-section of a single through hole of the air outlet filter portion is smaller than the flow cross-section of a single air outlet of the air outlet guide portion, the air outlet filter portion can be used to block larger foreign objects such as reptiles from entering the air duct cavity of the rear shell of the air duct, thereby avoiding the problem that the heat dissipation performance and electrical performance of the heat dissipation structure of the electrical equipment are affected by the invasion of foreign objects such as reptiles.

[0032] In addition, the utility model also provides a power conversion device, including an electrical case and a heat dissipation structure arranged on the back side of the electrical case, wherein the heat dissipation structure is the heat dissipation structure described in any of the above schemes. Since the above heat dissipation structure has the above technical effects, the power conversion device having the heat dissipation structure should also have the corresponding technical effects, which will not be repeated here.

[0033] In addition, the utility model also provides a photovoltaic system, including a power conversion device, wherein the power conversion device is the power conversion device described in the above scheme. Since the power conversion device has the above technical effects, the photovoltaic system having the power conversion device should also have the corresponding technical effects, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0035] Figure 1 A schematic diagram of the overall axial structure of the heat dissipation structure provided by an embodiment of the utility model;

[0036] Figure 2 A schematic diagram of the split structure of the air outlet filter part and the air outlet guide part of the air outlet assembly provided in an embodiment of the utility model before being assembled;

[0037] Figure 3 A schematic diagram of the structure of the air outlet filter and the air outlet guide of the air outlet assembly provided in the embodiment of the utility model after being assembled;

[0038] Figure 4 A schematic diagram of the structure of the air outlet guide portion provided in an embodiment of the utility model;

[0039] Figure 5 A schematic diagram of the structure of the air outlet assembly of the heat dissipation structure provided by the embodiment of the utility model exhausting air along a preset inclined direction;

[0040] Figure 6 A schematic diagram of the disassembled structure of the upper top shell wall, the bottom shell wall, the fan module and the air inlet mesh cover of the air duct rear shell provided by the embodiment of the utility model at a first viewing angle;

[0041] Figure 7 A schematic diagram of the disassembled structure of the upper top shell wall, the bottom shell wall, the fan module and the air inlet mesh cover of the air duct rear shell provided by an embodiment of the utility model at a second viewing angle.

[0042] in, Figure 1-Figure 7 middle:

[0043] Air duct rear shell 1, back plate 10, rear shell body 11, top shell wall 12, bottom shell wall 13, side shell wall 14, sealing plate 15;

[0044] The air outlet assembly 2, the air outlet filter 21, the air outlet guide 22, the base plate 221, the convex 222, the open end 222a, and the closed end 222b;

[0045] Electrical enclosure 3;

[0046] Air inlet assembly 4, fan module 41, air inlet mesh cover 42. DETAILED DESCRIPTION

[0047] The core of the utility model is to provide a heat dissipation structure, a power conversion device and a photovoltaic system to solve the problem that the heat dissipation structure of electrical equipment is invaded by foreign objects such as reptiles, thereby affecting the heat dissipation performance and electrical performance.

[0048] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0049] Reference Figure 1-Figure 5 As shown, the embodiment of the utility model provides a heat dissipation structure, which is applied to electrical equipment. The heat dissipation structure specifically includes a duct rear shell 1, an air outlet component 2 and an air inlet component 4, wherein the duct rear shell 1 is arranged on the back side of the electrical chassis 3, and is mainly used to form an air duct cavity with the electrical chassis 3, and an air inlet opening and an air outlet opening are arranged on the duct rear shell 1, the air inlet opening is mainly used to introduce the external environment airflow into the air duct cavity, and the air outlet opening is mainly used to discharge the airflow in the air duct cavity, thereby forming an air flow circulation; the air outlet component 2 is arranged on the air duct The rear shell 1 has an air outlet opening, and includes an air outlet filter portion 21 and an air outlet guide portion 22. The air outlet filter portion 21 is arranged on the air inlet side or the air outlet side of the air outlet guide portion 22, and the flow cross-section of a single through hole of the air outlet filter portion 21 is smaller than the flow cross-section of a single exhaust port of the air outlet guide portion 22, so as to prevent foreign matter from entering the air duct cavity of the air duct rear shell 1. The exhaust direction of the exhaust port of the air outlet guide portion 22 is configured to be inclined from the air duct rear shell 1 to the side where the electrical chassis 3 is located, so as to discharge the airflow in the air duct cavity in a preset inclined direction.

[0050] In the actual application process of the heat dissipation structure, the air outlet assembly 2 is designed to be the structural form of the air outlet filter portion 21 and the air outlet guide portion 22. Since the exhaust direction of the air outlet of the air outlet guide portion 22 is configured to be inclined from the air duct rear shell 1 to the side where the electrical chassis 3 is located, when the air duct rear shell 1 is discharged, the air flow in the air duct cavity can be discharged in a preset inclined direction through the air outlet guide portion 22. For details, refer to Figure 5 The air outlet direction shown, that is, the air outlet direction is away from the installation cavity wall or the installation frame facing the air duct rear shell 1, so that the requirement of inclined air outlet of the air duct rear shell 1 to ensure smooth air outlet can be met. At the same time, since the air outlet filter part 21 is arranged on the air inlet side or the air outlet side of the air outlet guide part 22, and the flow cross-section of a single through hole of the air outlet filter part 21 is smaller than the flow cross-section of a single exhaust port of the air outlet guide part 22, the air outlet filter part 21 can be used to block larger foreign objects such as reptiles from entering the air duct cavity of the air duct rear shell 1, thereby avoiding the problem that the heat dissipation performance and electrical performance of the electrical equipment are affected by the invasion of foreign objects such as reptiles.

[0051] It should be noted that the above-mentioned air outlet filter part 21 can be specifically configured as a dense mesh component, such as a dense mesh plate, a dense mesh cover or other structural parts with the function of filtering and blocking foreign objects such as reptiles, and the air outlet guide part 22 can be specifically configured as an air outlet grille component, such as a shutter structure, etc., and any air outlet grille structural part with a certain airflow guiding function can be used, and no more specific limitation is made here.

[0052] It should also be noted that the dense mesh components and the air outlet grille components can be specifically designed to be arranged from the inside to the outside at the air outlet opening; or the dense mesh components can be designed to be arranged on the outside of the air outlet grille components and covered at the air outlet of the air outlet grille components. In actual application, the corresponding arrangement can be selected according to actual needs, and no further specific limitation is made here.

[0053] Specifically, taking the dense mesh components and the air outlet grille components as an example, which can be specifically designed to be arranged from the inside to the outside at the air outlet opening, the arrangement method between the dense mesh components and the air outlet grille components is briefly described: the dense mesh components and the air outlet grille components can be specifically designed to be arranged in a stacked manner, and of course can also be designed to be arranged at a certain distance. In actual application, the arrangement can be selected according to actual needs; in addition, the dense mesh components and the air outlet grille components can be specifically designed to be an integrated fixed connection structure, such as welding, riveting and other fixed connection methods, or can be designed to be a detachable connection structure, such as referring to Figure 2 and Figure 3 The fastener connection structure, the snap-on structure, or the hinge connection structure shown can be selected and configured according to actual needs during actual application, and no further specific restrictions are made here.

[0054] It should also be noted that the above-mentioned air outlet grille component can be specifically configured to be stamped, for example, a sheet metal part is directly stamped to form an air outlet grille structure with multiple exhaust outlets. Of course, other molding methods known to technical personnel in this field can also be used, such as injection molding. In actual application, the corresponding molding method can be selected according to actual needs, and no more specific limitations are made here.

[0055] In a further embodiment, referring to Figure 4 As shown, the above-mentioned air outlet grille component may specifically include a substrate 221 and a plurality of convex bumps 222 formed on the substrate 221, wherein the convex bumps 222 have an open end 222a and a closed end 222b, wherein the open end 222a constitutes an exhaust port of the air outlet grille component, wherein the arrangement of the convex bumps 222 on the substrate 221 may be but is not limited to a matrix arrangement. When the air outlet grille component of this structural form performs the exhaust work, the airflow in the air duct cavity of the air duct rear shell 1 blows from the open end 222a of the previous convex bump 222 to the closed end 222b of the downstream convex bump 222, causing the airflow to be discharged obliquely upward, which can enhance the effect of oblique air discharge, especially when the air outlet opening of the air duct rear shell 1 is arranged on the top shell wall 12 of the air duct rear shell 1, the air outlet grille component of this structural form can also prevent free-falling foreign matter from entering the air duct cavity of the air duct rear shell 1.

[0056] It should also be noted that the arrangement position of the above-mentioned air outlet component 2 on the air duct rear shell 1 can be selected to be set at the top of the circumferential shell wall of the air duct rear shell 1, or it can be selected to be set at the side of the circumferential shell wall of the air duct rear shell 1, and it can also be selected to be set at the bottom of the circumferential shell wall of the air duct rear shell 1. During actual application, the corresponding position can be selected according to actual needs, and the arrangement position is not limited to one place. The air outlet component 2 can also be arranged at multiple positions on the air duct rear shell 1, which specifically correspond to the position of the air outlet opening designed on the air duct rear shell 1.

[0057] In some other specific embodiments, referring to Figure 1 Combination Figure 5-Figure 7The above-mentioned heat dissipation structure should also include an air inlet component 4 arranged at the air inlet opening of the air duct rear shell 1, and the air inlet component 4 can specifically include a fan module 41 and an air inlet mesh cover 42, wherein the fan module 41 is arranged in the air duct rear shell 1, and the fan module 41 has an air inlet surface adapted to the air inlet opening, which is mainly used to provide power for the air flow circulation in the air duct cavity; the air inlet mesh cover 42 is arranged at the air inlet opening in a manner that it can be disassembled and assembled from the outside of the air duct rear shell 1, and the function of the air inlet mesh cover 42 is mainly to prevent some debris in the air from entering the air duct cavity, such as catkins, poplar catkins, cotton catkins, plush and other materials. In actual application, even if the electrical equipment is mounted on a wall or a rack, and the air duct rear shell 1 is installed on the back side of the electrical chassis 3 of the electrical equipment, the air inlet mesh cover 42 is arranged at the air inlet opening in a manner that can be disassembled and assembled from the outside of the air duct rear shell 1. Therefore, when the heat dissipation structure needs to be cleaned, there is no need to shut down the electrical equipment. Only the air inlet mesh cover 42 needs to be directly removed for cleaning. The operation is very simple and avoids the problem of power generation loss due to shutdown.

[0058] In a further embodiment, referring to Figure 1 Combination Figure 5-Figure 7 The air inlet grille 42 can be specifically designed to be detachably mounted on the back plate 10 of the air duct rear shell 1. By designing this structural form, the assembly and disassembly structure of the air inlet grille 42 is simpler and convenient to arrange. The detachable manner of the air inlet grille 42 and the back plate 10 can be, but is not limited to, one or a combination of at least two of the detachable connection manners such as pulling and sliding along the surface where the air inlet grille 42 is located, a fastener fixed connection manner, and a snap connection manner. For example, the air inlet grille 42 slides relative to the back plate 10 along the side of the air inlet grille 42 facing the air duct rear shell 1. The specific structure of the slide-pull slide cooperation can be that the back plate is provided with a first slide groove and a second slide groove, the upper edge of the air inlet grille 42 slides with the first slide groove, and the lower edge of the air inlet grille 42 slides with the second slide groove. Of course, it can also be other sliding cooperation structures, such as a slide rail designed on the back plate 10, and a slide groove matched with the slide rail designed on the air inlet grille 42, etc., which are not further specified here. Because most electrical equipment uses bottom wiring, by designing this side pull-pull slide cooperation method, the disassembly and assembly of the air inlet grille 42 is more convenient, and the pulling and pulling of the air inlet grille 42 can avoid mutual interference with the wiring of the electrical equipment. Of course, it can be understood that in addition to the side pull-pull method, when there are other layout requirements, other directions of pull-pull methods can also be selected, which are not further specified here.

[0059] It should be noted that the above-mentioned pull-out and sliding cooperation method can be combined with the fastener fixed connection method and the snap-on connection method. For example, the air inlet mesh cover 42 slides to the position where it needs to be installed and locked, and is fixed and locked by fasteners or a snap-on structure. When it needs to be disassembled and pulled out, the fasteners or the snap-on structure are opened, and the air inlet mesh cover 42 can be removed by a pulling operation. The design position of the fasteners or the snap-on structure can be arranged in an area on the side of the air duct rear shell 1 for convenient operation.

[0060] It should also be noted that when the air duct rear shell 1 has a design requirement of bottom air intake, the air intake mesh cover 42 can also be selectively disposed on the bottom shell wall 13 of the air duct rear shell 1 in a detachable manner.

[0061] In some specific embodiments, reference Figure 1 Combination Figure 5-Figure 7 The above-mentioned fan module 41 is arranged on the air duct rear shell 1 in a manner of pulling and sliding along the surface where the air inlet mesh cover 42 is located. For example, the pulling and pulling direction of the fan module 41 relative to the air duct rear shell 1 is configured to be pulled toward the side of the air duct rear shell 1, and the specific structural form of its pulling and sliding cooperation can be, but is not limited to, designed as a first slide and a second slide provided on the air duct rear shell 1, the top of the fan module 41 slides with the first slide, and the bottom of the fan module 41 slides with the second slide. Of course, it can also be other sliding cooperation structural forms, which are not further limited here. By designing the fan module 41 to be detachable in the above-mentioned pulling and sliding manner, it is more convenient to clean the fan module 41 after the fan module 41 is removed, and it is also convenient to clean other heat dissipation devices in the air duct cavity surrounded by the air duct rear shell 1 and the electrical chassis 3. Taking the inverter as an example of electrical equipment, due to the removal of the fan module 41, the heat sink, reactor and other heat dissipation devices in the air duct cavity surrounded by the air duct rear shell 1 and the electrical chassis 3 will be exposed, making it convenient to clean these components.

[0062] In some other specific embodiments, the side of the air duct rear shell 1 may also be provided with a pull-out opening and a sealing plate 15 detachably sealed to the pull-out opening. By designing the pull-out opening and the sealing plate 15, the air duct rear shell 1 can be closed when in use, which helps to improve the appearance of the air duct rear shell 1 and prevent the fan module 41 from falling off.

[0063] In some more specific embodiments, when the fan module 41 is arranged on the air duct rear shell 1 in a sliding manner along the surface where the air inlet mesh cover 42 is located, the air inlet mesh cover 42 can also be directly arranged on the air inlet surface of the fan module 41, and can be pulled relative to the air duct rear shell 1 together with the fan module 41. By designing into this structural form, the fan module 1 and the air inlet mesh cover 6 can be disassembled and assembled together, and the disassembly and assembly operation is more convenient.

[0064] It should be noted that the fan module 41 may specifically include a fan bracket and at least one heat dissipation fan arranged on the fan bracket, wherein the number of heat dissipation fans installed on the fan bracket may be arranged according to actual needs, and the heat dissipation fan may be designed as an integrated structure with the fan bracket, or may be designed as a split detachable connection method, such as a snap connection, a fastener connection, etc. In actual application, the configuration may be selected according to needs, and the air inlet mesh cover 42 is arranged on the fan bracket and covers the air inlet side end face of the heat dissipation fan. By arranging the heat dissipation fan on the fan bracket, when there are multiple heat dissipation fans, multiple heat dissipation fans may form an integral module, which is more convenient to disassemble and assemble. In addition, the air inlet mesh cover 42 is installed on the fan bracket, which makes the air inlet mesh cover 42 more convenient to disassemble and assemble, such as being directly fixed to the fan bracket by fasteners, or other fixing methods commonly used by technicians in this field, such as snap-on fixing methods, etc.

[0065] In some more specific embodiments, reference Figure 5-Figure 7 The above-mentioned air duct rear shell 1 can specifically include a rear shell body 11, a top shell wall 12 arranged at the top of the rear shell body 11, a bottom shell wall 13 arranged at the bottom of the rear shell body 11 and a side shell wall 14 arranged at the side of the rear shell body 11, and at least one of the top shell wall 12, the bottom shell wall 13 and the side shell wall 14 is configured as a ventilation mesh structure; wherein the top shell wall 12 and the rear shell body 11 can be configured to be detachably connected; the bottom shell wall 13 and the rear shell body 11 can also be configured to be detachably connected; the side shell wall 14 and the rear shell body 11 can also be configured to be detachably connected. By designing the above-mentioned structural form, it is more convenient for users to clean the heat dissipation devices in the air duct cavity surrounded by the air duct rear shell 1 and the electrical chassis 3. For example, when the top shell wall 12 is opened, it is convenient to clean the heat dissipation devices corresponding to the top of the air duct cavity; for example, when the bottom shell wall 13 is opened, it is convenient to clean the heat dissipation devices corresponding to the bottom of the air duct cavity; for example, when the side shell wall 14 is opened, it is convenient to clean the heat dissipation devices corresponding to the side of the air duct cavity. In addition, the air outlet component 2 and the air inlet component 4 can select the corresponding layout position according to the needs.

[0066] It should be noted that the detachable connection method between the top shell wall 12 and the rear shell body 11 may be, but is not limited to, one or a combination of at least two of the methods selected from the group consisting of a pull-out sliding fit, a fastener fixed connection method, and a snap-on connection method; similarly, the detachable connection method between the bottom shell wall 13 and the rear shell body 11 may be, but is not limited to, one or a combination of at least two of the methods selected from the group consisting of a pull-out sliding fit, a fastener fixed connection method, and a snap-on connection method; in addition, the detachable connection method between the side shell wall 14 and the rear shell body 11 may also be, but is not limited to, one or a combination of at least two of the methods selected from the group consisting of a pull-out sliding fit, a fastener fixed connection method, and a snap-on connection method.

[0067] In addition, the utility model also provides a power conversion device, including an electrical chassis 3, a power conversion circuit installed in the electrical chassis 3, and a heat dissipation structure arranged on the back side of the electrical chassis 3, and the heat dissipation structure is the heat dissipation structure described in any of the above schemes. Since the above heat dissipation structure has the above technical effects, the power conversion device having the heat dissipation structure should also have the corresponding technical effects, which will not be repeated here.

[0068] It should be noted that the above-mentioned power conversion device can be a DC-DC converter or a DC-AC converter. In actual application, it can be applied to different scenarios according to actual needs. Taking a DC-AC converter, that is, an inverter, as an example, it has a power conversion circuit inside. The power devices in the power conversion circuit will generate heat during operation. Therefore, a heat dissipation duct is also configured inside the inverter. The heat generated by the power devices can be discharged through the heat dissipation duct, thereby ensuring the normal operation of the power devices. Among them, one of the power sources for exhausting the heat dissipation duct is the fan module 41.

[0069] In addition, the utility model also provides a photovoltaic system, including a power conversion device, and the power conversion device is the power conversion device described in the above scheme. Since the above power conversion device has the above technical effects, the photovoltaic system with the power conversion device should also have the corresponding technical effects, which will not be repeated here.

[0070] Taking the photovoltaic inverter as an example, as a power conversion device, the photovoltaic inverter is a conversion device in the photovoltaic power station, and its function and role play an important role in the entire power station. The photovoltaic inverter converts the direct current generated by the photovoltaic module into a sine wave current, which is connected to the load or integrated into the power grid. It is the core device in the photovoltaic system.

[0071] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0072] As shown in this application and claims, unless the context clearly indicates an exception, the words "a", "an", "a kind" and / or "the" do not refer to the singular, but also include the plural. Generally speaking, the terms "include" and "comprise" only indicate the inclusion of clearly identified steps and elements, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements. The elements defined by the sentence "includes a..." do not exclude the existence of other identical elements in the process, method, commodity or device that includes the elements.

[0073] In the description of the embodiments of the present application, unless otherwise specified, " / " means or, for example, A / B can mean A or B; "and / or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, "multiple" means two or more than two.

[0074] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0075] This article uses specific examples to illustrate the principles and implementation methods of the utility model. The above examples are only used to help understand the core idea of ​​the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A heat dissipation structure, characterized in that: include: An air duct rear shell (1) is arranged on the back side of the electrical machine box (3); An air outlet assembly (2) is arranged at an air outlet opening on the circumferential shell wall of the air duct rear shell (1), and comprises an air outlet filter portion (21) and an air outlet guide portion (22); the air outlet filter portion (21) is arranged on the air inlet side or the air outlet side of the air outlet guide portion (22), and the flow cross-section of a single through hole of the air outlet filter portion (21) is smaller than the flow cross-section of a single air outlet of the air outlet guide portion (22); the air outlet direction of the air outlet of the air outlet guide portion (22) is configured to be inclined from the air duct rear shell (1) to the side where the electrical chassis (3) is located.

2. The heat dissipation structure according to claim 1, characterized in that: The air outlet filter portion (21) is configured as a dense mesh component, and the air outlet guide portion (22) is configured as an air outlet grille component.

3. The heat dissipation structure according to claim 2, characterized in that: The dense mesh components and the air outlet grille components are arranged in sequence from inside to outside at the air outlet opening.

4. The heat dissipation structure according to claim 3, characterized in that: The dense mesh component and the air outlet grille component are arranged in a stacked manner; And / or, the dense mesh component and the air outlet grille component are an integrated fixed structure or a detachable connection structure.

5. The heat dissipation structure according to claim 2, characterized in that: The dense mesh component is arranged on the outer side of the air outlet grille component and covers the air outlet of the air outlet grille component.

6. The heat dissipation structure according to claim 2, characterized in that: The air outlet grille component is configured to be stamped or injection molded; And / or, the air outlet grille component comprises a substrate (221) and a plurality of convex bumps (222) formed on the substrate (221), the convex bumps (222) having an open end (222a) and a closed end (222b), and the open end (222a) constitutes an air outlet of the air outlet grille component.

7. The heat dissipation structure according to claim 1, characterized in that: The air outlet assembly (2) is arranged on the top of the circumferential shell wall of the air duct rear shell (1); And / or, the air outlet assembly (2) is arranged on the side of the circumferential shell wall of the air duct rear shell (1); And / or, the air outlet assembly (2) is arranged at the bottom of the circumferential shell wall of the air duct rear shell (1).

8. The heat dissipation structure according to any one of claims 1 to 7, characterized in that: It also includes an air inlet assembly (4) arranged at the air inlet opening of the air duct rear shell (1), and the air inlet assembly (4) includes: A fan module (41) is arranged in the air duct rear shell (1), and the fan module (41) has an air inlet surface adapted to the air inlet opening; The air inlet mesh cover (42) is arranged at the air inlet opening in a manner that it can be disassembled and assembled from the outside of the air duct rear shell (1).

9. The heat dissipation structure according to claim 8, characterized in that: The air inlet mesh cover (42) is detachably arranged on the back plate (10) of the air duct rear shell (1).

10. The heat dissipation structure according to claim 9, characterized in that: The detachable manner of the air inlet grille (42) and the back plate comprises one of the three modes, or a combination of at least two of them, including a pull-and-slide fit along the surface where the air inlet grille (42) is located, a fastener fixed connection mode, and a snap connection mode.

11. The heat dissipation structure according to claim 8, characterized in that: The fan module (41) is arranged on the air duct rear shell (1) in a manner of pulling and sliding along the surface where the air inlet mesh cover (42) is located.

12. The heat dissipation structure according to claim 11, characterized in that: The air inlet mesh cover (42) is arranged on the air inlet surface of the fan module (41), and can be pulled relative to the air duct rear shell (1) together with the fan module (41).

13. The heat dissipation structure according to any one of claims 1 to 7 or any one of claims 9 to 12, characterized in that: The air duct rear shell (1) comprises a rear shell body (11), a top shell wall (12) arranged at the top of the rear shell body (11), a bottom shell wall (13) arranged at the bottom of the rear shell body (11), and a side shell wall (14) arranged at the side of the rear shell body (11), and at least one of the top shell wall (12), the bottom shell wall (13) and the side shell wall (14) is configured as a ventilation mesh cover structure; Wherein, the top shell wall (12) and the rear shell body (11) are configured to be detachably connected; And / or, the bottom shell wall (13) and the rear shell body (11) are configured to be detachably connected; And / or, the side shell wall (14) and the rear shell body (11) are configured to be detachably connected.

14. A power conversion device, comprising an electrical chassis (3) and a heat dissipation structure arranged on the back side of the electrical chassis (3), characterized in that: The heat dissipation structure is the heat dissipation structure according to any one of claims 1 to 13.

15. A photovoltaic system comprising a power conversion device, characterized in that: The power conversion device is the power conversion device as claimed in claim 14.

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