Inverter and heat dissipation structure thereof

Abstract

The present application discloses an inverter and a heat dissipation structure thereof. The heat dissipation structure of the inverter comprises a first cabinet body and a second cabinet body. The first cabinet body comprises a heat dissipation cavity and an electronic cavity; the electronic cavity is used for accommodating an inverter power module part; the heat dissipation cavity is used for allowing air to flow through so as to cool a power module heat dissipation device; and the power module heat dissipation device is used for dissipating heat of a power module of the inverter power module part. The second cabinet body comprises a direct-current power distribution cavity and an alternating-current power distribution cavity; the direct-current power distribution cavity is used for accommodating a direct-current power distribution part; the alternating-current power distribution cavity is used for accommodating an alternating-current power distribution part; and at least one of the direct-current power distribution cavity and the alternating-current power distribution cavity is communicated with the electronic cavity to form a first circulating air duct. In the heat dissipation structure of the inverter, the heat dissipation of at least one of the direct-current power distribution part and the alternating-current power distribution part is coupled with the heat dissipation of the device in the electronic cavity, thereby reducing the heat dissipation cost.

Description

Inverter and its heat dissipation structure

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on November 16, 2023, with application number 202323132175.1 and invention name “Inverter and its heat dissipation structure”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the technical field of photovoltaic power generation, and more specifically, to an inverter and a heat dissipation structure thereof. Background Art

[0003] In a grid-connected photovoltaic power generation system, the inverter is the interface device that connects the photovoltaic power station to the power grid. The higher the inverter power, the lower the cost per watt, which is more conducive to the photovoltaic power station's grid parity.

[0004] To increase the power of the inverter, the inverter components are modularized to form multiple modular components. These multiple modular components are independent of each other, and typically each modular component dissipates heat independently, resulting in high heat dissipation costs for the entire inverter.

[0005] In summary, how to design the heat dissipation of modular components in an inverter to reduce the heat dissipation cost of the inverter is an urgent problem to be solved by those skilled in the art.

[0006] Summary of the Invention

[0007] In view of this, an object of the present application is to provide an inverter and a heat dissipation structure thereof, so as to reduce the heat dissipation cost of the inverter.

[0008] In order to achieve the above objectives, this application provides the following technical solutions:

[0009] A heat dissipation structure of an inverter, comprising: a first cabinet and a second cabinet;

[0010] The first cabinet includes a heat dissipation cavity and an electronic cavity. The electronic cavity is used to accommodate the inverter power module part. The heat dissipation cavity is used to allow air to flow through for cooling the power module radiator. The power module radiator is used to dissipate heat for the power module of the inverter power module part.

[0011] The second cabinet includes a DC distribution cavity and an AC distribution cavity, the DC distribution cavity is used to accommodate the DC distribution part, the AC distribution cavity is used to accommodate the AC distribution part, and at least one of the DC distribution cavity and the AC distribution cavity is connected to the electronic cavity to form a first circulation air duct.

[0012] Optionally, the second cabinet further includes a filter reactor cavity, wherein the filter reactor cavity is used to accommodate the reactor, and the filter reactor cavity is used for allowing air to flow through to cool the reactor.

[0013] Optionally, the second cabinet further includes at least one first heat exchanger, and the first heat exchanger is used to perform heat exchange between the air in the circulating air duct and the air flowing through the filter reactor cavity.

[0014] Optionally, at least one of the first heat exchangers is located between the air inlet of the filter reactor cavity and the reactor.

[0015] Optionally, the DC power distribution cavity includes a first DC air duct and a second DC air duct, and the first DC air duct is closer to the electronic cavity than the second DC air duct.

[0016] The AC power distribution cavity includes a first AC air duct and a second AC air duct, wherein the first AC air duct is closer to the electronic cavity than the second AC air duct.

[0017] The first DC sub-air duct forms part of the first circulating air duct, and the first AC sub-air duct forms part of the first circulating air duct.

[0018] Optionally, the second DC sub-air duct and the second AC sub-air duct are connected to form a second circulation air duct;

[0019] Wherein, at least one of the first heat exchangers is used to perform heat exchange between the air in the second circulation air duct and the air flowing through the filter reactor cavity.

[0020] Optionally, the first circulation air duct and the second circulation air duct share a section of air duct, and at least one of the first heat exchangers is located in the air duct shared by the first circulation air duct and the second circulation air duct.

[0021] Optionally, the electronic cavity, the DC power distribution cavity and the AC power distribution cavity are connected end to end in sequence to form the first circulation air duct.

[0022] Optionally, the air duct in the DC distribution cavity extends from the top of the DC distribution cavity to the bottom of the DC distribution cavity, and the air duct in the AC distribution cavity extends from the top of the AC distribution cavity to the bottom of the AC distribution cavity.

[0023] Optionally, the bottom end of the DC distribution cavity and the bottom end of the AC distribution cavity are connected through a first connecting channel, and the top end of the DC distribution cavity or the top end of the AC distribution cavity is connected to the electronic cavity through a second connecting channel;

[0024] Among them, one of the first connecting channel and the second connecting channel is located between the air inlet of the filter reactor cavity and the reactor, and the other is located between the air outlet of the filter reactor cavity and the reactor.

[0025] Optionally, at least one of the first heat exchangers is disposed at the first connecting channel, and / or at least one of the first heat exchangers is disposed at the second connecting channel.

[0026] Optionally, the DC power distribution cavity includes a first DC air duct and a second DC air duct connected in parallel, and the AC power distribution cavity includes a first AC air duct and a second AC air duct connected in parallel;

[0027] The first DC air branch duct is connected to the first AC air branch duct, and the second DC air branch duct is connected to the second AC air branch duct.

[0028] Optionally, the connection position between the first DC air duct and the first AC air duct, and the connection position between the second DC air duct and the second AC air duct are both located between the top and bottom ends of the DC power distribution cavity, and between the top and bottom ends of the AC power distribution cavity;

[0029] The second DC air branch duct passes through the bottom end of the DC power distribution cavity, and the second AC air branch duct passes through the bottom end of the AC power distribution cavity.

[0030] Optionally, the first DC air sub-duct and the first AC air sub-duct, as well as the second DC air sub-duct and the second AC air sub-duct are connected via a common first connecting channel; or, the first DC air sub-duct and the first AC air sub-duct, as well as the second DC air sub-duct and the second AC air sub-duct are connected via different first connecting channels;

[0031] The top of the DC distribution cavity or the top of the AC distribution cavity is connected to the electronic cavity through a second connecting channel;

[0032] The air inlet of the filter reactor cavity, the second connecting channel, the first connecting channel and the reactor are sequentially distributed along the airflow direction in the filter reactor cavity.

[0033] Optionally, at least one first heat exchanger is arranged at each first connecting channel, and / or at least one first heat exchanger is arranged at the second connecting channel.

[0034] Optionally, the communication position between the first DC air duct and the first AC air duct is located between the top and bottom ends of the DC power distribution cavity, and between the top and bottom ends of the AC power distribution cavity;

[0035] The communicating position of the second DC air branch duct and the second AC air branch duct is located at the bottom end of the DC power distribution cavity and the bottom end of the AC power distribution cavity.

[0036] Optionally, the first DC air branch duct and the first AC air branch duct are connected via a first connecting channel, and the second DC air branch duct and the second AC air branch duct are connected via a third connecting channel;

[0037] The DC power distribution cavity or the AC power distribution cavity is connected to the electronic cavity through a second connecting channel;

[0038] The air inlet of the filter reactor cavity, the second connecting channel, the first connecting channel, the reactor and the third connecting channel are sequentially distributed along the airflow direction in the filter reactor cavity.

[0039] Optionally, at least one first heat exchanger is arranged at each first connecting channel, and / or at least one first heat exchanger is arranged at the third connecting channel, and / or at least one first heat exchanger is arranged at the second connecting channel.

[0040] Optionally, one of the DC power distribution cavity and the AC power distribution cavity is connected to the electronic cavity to form a first circulation air duct, and the other is not connected to the electronic cavity;

[0041] The second cabinet is provided with a fourth connecting channel and a fifth connecting channel; in the DC distribution cavity and the AC distribution cavity, one connected to the electronic cavity, the fourth connecting channel, the electronic cavity, and the fifth connecting channel are connected end to end in sequence to form a first circulation air duct.

[0042] Optionally, at least one of the first heat exchangers is disposed at the fourth connecting channel; and / or, at least one of the first heat exchangers is disposed at the fifth connecting channel.

[0043] Optionally, the second cabinet is provided with a second heat exchanger having a first channel and a second channel capable of heat exchange; one of the DC distribution cavity and the AC distribution cavity that is not connected to the electronic cavity is connected to the first channel, and the second channel is used for air to flow through.

[0044] Optionally, the air inlet and air outlet of the heat dissipation cavity are respectively located on different sides of the first cabinet, and the air inlet and air outlet of the filter reactor cavity are respectively located on different sides of the second cabinet; the first cabinet and the second cabinet are both cabinets, the air outlet of the filter reactor cavity and the air inlet of the heat dissipation cavity are located on different sides of the cabinet, and the air outlet of the heat dissipation cavity and the air inlet of the filter reactor cavity are located on different sides of the cabinet;

[0045] And / or, the DC power distribution cavity and the AC power distribution cavity are distributed on opposite sides of the filter reactance cavity;

[0046] And / or, the DC power distribution cavity and the AC power distribution cavity are relatively isolated from the filter reactance cavity.

[0047] Optionally, the first cabinet is provided with a third heat exchanger, the third heat exchanger having a first channel and a second channel capable of performing heat exchange, the first channel being connected to the heat dissipation cavity, and the second channel being connected to the electronic cavity;

[0048] And / or, the heat dissipation cavity and the electronic cavity are relatively isolated, and the first circulation air duct is a closed air duct;

[0049] And / or, the electronic cavity is also used to accommodate a control circuit part;

[0050] And / or, the first cabinet and the second cabinet are distributed sequentially along the vertical direction.

[0051] Based on the heat dissipation structure of the inverter provided above, the present application further provides an inverter, which includes the heat dissipation structure of the inverter described in any one of the above items.

[0052] In the heat dissipation structure of the inverter provided in the present application, by dividing the first cabinet into a heat dissipation cavity and an electronic cavity, the heat dissipation cavity is used to dissipate heat from the power module radiator, which can achieve forced air cooling and effectively improve the heat dissipation efficiency of the power module. It is also convenient to ensure the protection requirements of the components in the electronic cavity, and also provides a premise for the heat dissipation coupling of the electronic cavity and other cavities (DC distribution cavity and / or AC distribution cavity); at the same time, the second cabinet includes a DC distribution cavity and an AC distribution cavity, and at least one of the DC distribution cavity and the AC distribution cavity is connected to the electronic cavity to form a circulating air duct, so that the heat dissipation of at least one of the DC distribution part and the AC distribution part is coupled with the heat dissipation of the components in the electronic cavity, which reduces the heat dissipation cost compared with the prior art in which the first cabinet and the second cabinet dissipate heat separately (each modular component dissipates heat independently). BRIEF DESCRIPTION OF THE DRAWINGS

[0053] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without any creative work.

[0054] FIG1 is a schematic structural diagram of a heat dissipation structure of an inverter provided in a first embodiment of the present application;

[0055] FIG2 is a side view of the structure shown in FIG1 ;

[0056] FIG3 shows an airflow direction in a heat dissipation cavity of a heat dissipation structure of an inverter provided in Example 1 of the present application;

[0057] FIG4 shows another airflow direction in the heat dissipation cavity of the heat dissipation structure of the inverter provided in the first embodiment of the present application;

[0058] FIG5 shows another airflow direction in the heat dissipation cavity of the heat dissipation structure of the inverter provided in the first embodiment of the present application;

[0059] FIG6 shows another airflow direction in the heat dissipation cavity of the heat dissipation structure of the inverter provided in the first embodiment of the present application;

[0060] FIG7 shows another airflow direction in the heat dissipation cavity of the heat dissipation structure of the inverter provided in the first embodiment of the present application;

[0061] FIG8 shows another airflow direction in the heat dissipation cavity of the heat dissipation structure of the inverter provided in the first embodiment of the present application;

[0062] FIG9 shows another airflow direction in the heat dissipation cavity of the heat dissipation structure of the inverter provided in the first embodiment of the present application;

[0063] FIG10 shows an airflow direction in a filter reactor cavity in a heat dissipation structure of an inverter provided in Example 1 of the present application;

[0064] FIG11 is a schematic structural diagram of a heat dissipation structure of an inverter provided in Example 2 of the present application;

[0065] FIG12 is a side view of the structure shown in FIG11;

[0066] FIG13 is another schematic structural diagram of the heat dissipation structure of the inverter provided in the second embodiment of the present application;

[0067] FIG14 is another schematic structural diagram of the heat dissipation structure of the inverter provided in the second embodiment of the present application;

[0068] FIG15 is a schematic structural diagram of a heat dissipation structure of an inverter provided in Example 3 of the present application;

[0069] FIG16 is a side view of the structure shown in FIG15;

[0070] FIG17 is another schematic diagram of the heat dissipation structure of the inverter provided in the third embodiment of the present application;

[0071] FIG18 is a side view of the structure shown in FIG17;

[0072] FIG19 is another schematic diagram of the heat dissipation structure of the inverter provided in the third embodiment of the present application;

[0073] FIG20 is another schematic structural diagram of the heat dissipation structure of the inverter provided in Example 3 of the present application;

[0074] FIG21 is a schematic structural diagram of a heat dissipation structure of an inverter provided in a fourth embodiment of the present application;

[0075] FIG22 is a schematic structural diagram of a heat dissipation structure of an inverter provided in Example 5 of the present application;

[0076] FIG23 is a side view of the structure shown in FIG22;

[0077] Figure 24 is a structural schematic diagram of the air-to-air heat exchanger in the heat dissipation structure of the inverter provided in an embodiment of the present application.

[0078] Explanation of the accompanying symbols: 100 is the first cabinet, 200 is the second cabinet; 101 is the heat dissipation cavity, 102 is the electronic cavity, 103 is the first air inlet, 104 is the first air outlet, 105 is the second air inlet; 201 is the DC power distribution cavity, 2011 is the first DC branch air duct, 2012 is the second DC branch air duct, 202 is the AC power distribution cavity, 2021 is the first AC branch air duct, 2022 is the second AC branch air duct, 203 is the filter reactor cavity, 204 is the third air inlet, 205 is the third air outlet; 1 is the third fan, 2 is the DC power distribution part, 3 is the AC power distribution part, 4 is the reactor, 5 is the reactor, is the first connecting channel, 6 is the second connecting channel, 7 is the second fan, 8 is the fourth fan, 9 is the fifth fan, 10 is the first fan, 11 is the power module radiator, 12 is the first partition, 13 is the second partition, 14 is the sixth fan, 15 is the seventh fan, 16 is the third connecting channel, 17 is the fifth connecting channel, 18 is the third partition, 19 is the fourth connecting channel, 20 is the third heat exchanger, and 21 is the eighth fan; 01 is the first heat exchange channel, and 02 is the second heat exchange channel. DETAILED DESCRIPTION

[0079] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0080] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. The terms used in the following embodiments are only for the purpose of describing specific embodiments and are not intended to be limiting of the present application. As used in the specification and appended claims of the present application, the singular expressions "one", "a kind of", "said", "above", "the" and "this" are intended to also include expressions such as "one or more", unless there is a clear contrary indication in the context. It should also be understood that in the embodiments of the present application, "one or more" refers to one, two or more; "and / or" describes the association relationship of associated objects, indicating that three relationships may exist; for example, A and / or B can represent: the existence of A alone, the existence of A and B at the same time, and the existence of B alone, where A and B can be singular or plural. The character " / " generally indicates that the related objects before and after are in an "or" relationship.

[0081] References to "one embodiment" or "some embodiments" in this specification mean that a particular feature, structure, or characteristic described in conjunction with that embodiment is included in one or more embodiments of the present application. Thus, phrases such as "in one embodiment," "in some embodiments," "in other embodiments," and "in yet other embodiments" appearing in various places in this specification do not necessarily refer to the same embodiment, but rather mean "one or more but not all embodiments," unless otherwise specifically emphasized. The terms "including," "comprising," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0082] The "multiple" involved in the embodiments of the present application means greater than or equal to two. It should be noted that in the description of the embodiments of the present application, the words "first" and "second" are only used for the purpose of distinguishing the description and cannot be understood as indicating or implying relative importance or order.

[0083] The inverter mainly includes DC distribution part, inverter power module part, AC filter part, AC distribution part, and control circuit part.

[0084] In an inverter, the inverter power module and control circuitry can be considered part of the first modular assembly, while the DC power distribution, AC filtering, and AC power distribution components can be considered part of the second modular assembly. The first modular assembly is typically housed in a first cabinet, while the second modular assembly is housed in a second cabinet. The first and second cabinets are relatively independent.

[0085] It should be noted that the first modular assembly and the second modular assembly can both be used independently and interchangeably between different inverters, and can also be used outdoors when necessary. The inverter can also include other modular assemblies, not limited to the first and second modular assemblies described above.

[0086] The first cabinet and the second cabinet dissipate heat independently, that is, the first modular component and the second modular component dissipate heat independently, resulting in a high heat dissipation cost for the entire inverter.

[0087] Based on the above problems, embodiments of the present application provide an inverter and a heat dissipation structure thereof to reduce the heat dissipation cost of the inverter.

[0088] Based on the functions, dimensions, heat generation characteristics, and inherent protection levels of each inverter component (DC power distribution, inverter power module, AC filter, AC power distribution, and control circuit), the inverter's heat dissipation structure is rationally designed and optimized. The following four examples specifically illustrate the heat dissipation structure of the inverter provided in the embodiments of this application.

[0089] Example 1

[0090] As shown in FIG. 1 and FIG. 2 , the heat dissipation structure of the inverter provided in the first embodiment includes a first cabinet 100 and a second cabinet 200 .

[0091] In this embodiment, the first cabinet 100 is located at the top of the second cabinet 200. It can be understood that the first cabinet 100 and the second cabinet 200 are distributed in sequence from top to bottom along the vertical direction.

[0092] Of course, the first cabinet 100 and the second cabinet 200 may be distributed in sequence from bottom to top along the vertical direction; or, the first cabinet 100 and the second cabinet 200 may be distributed in sequence along other directions, not limited to the vertical direction.

[0093] The first cabinet 100 includes a heat dissipation cavity 101 and an electronic cavity 102. The distribution of the heat dissipation cavity 101 and the electronic cavity 102 is selected according to actual conditions and is not limited in this embodiment.

[0094] The electronic cavity 102 is used to accommodate components such as the inverter power module and the control circuit. This facilitates connection between components. It is understood that the inverter power module includes an inverter module. It should be noted that Figures 1 and 2 do not show the components within the electronic cavity 102. The control circuit may also be located elsewhere, for example, in the second cabinet 200, although this embodiment does not limit this.

[0095] The power module of the inverter power module generates a large amount of heat, and the heat is relatively concentrated. In order to meet the heat dissipation requirements of the power module, a power module heat sink 11 is used to dissipate heat from the power module. It can be understood that the power module heat sink 11 dissipates heat from the power module.

[0096] The functional module radiator 11 can be an air-cooled radiator, which includes a heat dissipation substrate and heat dissipation fins arranged on the heat dissipation substrate. The functional module is arranged on the heat dissipation substrate, and the heat of the functional module is transferred to the heat dissipation substrate, and the heat dissipation substrate dissipates heat through the heat dissipation fins.

[0097] The functional module radiator 11 can also be a liquid-cooled radiator, with the functional module mounted on the liquid-cooled radiator. In this case, the first cabinet 100 needs to be equipped with a liquid cooling system, which is connected to the liquid-cooled radiator and is used to cool the coolant in the liquid-cooled radiator. The coolant can be water or another liquid, which is not limited in this embodiment.

[0098] The above-mentioned liquid cooling system mainly includes: a liquid cooling heat exchanger, and a circulation pump that drives the coolant to circulate between the liquid cooling heat exchanger and the liquid cooling radiator.

[0099] Of course, the functional module heat sink 11 may also be of other types and is not limited to the above two types.

[0100] The heat dissipation cavity 101 is used for allowing air to flow through to cool the power module heat sink 11. It is understandable that the air entering the heat dissipation cavity 101 is the air outside the heat dissipation cavity 101, for example, the air outside the entire inverter or the air in a cavity in the inverter other than the heat dissipation cavity 101.

[0101] In FIG1 , the dotted arrow in the first cabinet 100 indicates the air flow direction of the heat dissipation cavity 101 . The direction indicated by the dotted arrow is only an approximate direction and is only schematic, and is not absolute.

[0102] To improve the protection level of the electronic cavity 102, the heat dissipation cavity 101 and the electronic cavity 102 can be relatively isolated, so that the protection levels of the heat dissipation cavity 101 and the electronic cavity 102 are different, and the protection level of the electronic cavity 102 is higher than the protection level of the heat dissipation cavity 101. The heat dissipation cavity 101 can be called a low-protection cavity, and the electronic cavity 102 can be called a high-protection cavity.

[0103] The power module radiator 11 can be disposed in the heat dissipation cavity 101 or the electronic cavity 102. To facilitate maintenance of the power module radiator 11 and improve the protection level of the electronic cavity 102, the power module radiator 11 can be disposed in the heat dissipation cavity 101.

[0104] Exemplarily, the functional module heat sink 11 is an air-cooled heat sink, and the heat dissipation fins of the functional module heat sink 11 are located in the heat dissipation cavity 101. Air flowing through the heat dissipation cavity 101 flows through the heat dissipation fins, thereby cooling the power module heat sink 11. In this case, the entire functional module heat sink 11 can be set in the heat dissipation cavity 101, or part of the functional module heat sink 11 (the heat dissipation fins) can be located in the heat dissipation cavity 101.

[0105] Exemplarily, the power module radiator 11 is a liquid-cooled radiator. The liquid-cooled heat exchanger of the liquid-cooled system is disposed within the heat dissipation cavity 101. Air flowing through the heat dissipation cavity 101 flows through the liquid-cooled heat exchanger to cool the coolant in the liquid-cooled heat exchanger, thereby cooling the coolant in the liquid-cooled radiator, thereby cooling the functional module radiator. In this case, the entire power module radiator 11 can be disposed within the heat dissipation cavity 101 or within the electronic cavity 102, or a portion of the functional module radiator 11 can be disposed within the heat dissipation cavity 101 and another portion within the electronic cavity 102. Alternatively, both the liquid-cooled heat exchanger and the circulating pump can be disposed within the heat dissipation cavity 101.

[0106] In the above structure, forced air cooling or forced liquid cooling can be used to dissipate heat from the power module, thereby improving the heat dissipation efficiency. At the same time, by dividing the first cabinet 100 into a heat dissipation cavity 101 and an electronic cavity 102, the heat dissipation cavity 101 is used to dissipate heat from the power module radiator 11, thereby achieving forced air cooling, effectively improving the heat dissipation efficiency, and ensuring the protection requirements of the components in the electronic cavity 102. It also provides a prerequisite for the heat dissipation coupling of the electronic cavity 102 and other cavities (DC distribution cavity 201 and / or AC distribution cavity 202).

[0107] The heat dissipation cavity 101 has an air inlet and an air outlet. In this embodiment, the air inlet of the heat dissipation cavity 101 includes a first air inlet 103 , and the air outlet of the heat dissipation cavity 101 includes a first air outlet 104 .

[0108] For example, as shown in FIG1 , there is one first air inlet 103 and two first air outlets 104 ; the first air inlet 103 is located at the front side of the first cabinet 100 ; one first air outlet 104 is located at the rear side of the first cabinet 100 , and the first air inlet 103 is lower than the first air outlet 104 ; the other first air outlet 104 is located at the top side of the first cabinet 100 and close to the rear side of the first cabinet 100 ;

[0109] It should be noted that the front and rear sides of the first cabinet 100 are opposite to each other, and cabinet doors are provided on both the front and rear sides of the first cabinet 100. The front and rear sides of the first cabinet 100 are respectively two sides of the first cabinet 100 in its transverse direction.

[0110] The positions of the first air inlet 103 and the first air outlet 104 in FIG1 can be interchanged, and accordingly, the numbers of the first air inlet 103 and the first air outlet 104 can also be interchanged. The structure after the interchange is shown in FIG3 .

[0111] It should be noted that when the air inlet or outlet of the heat dissipation cavity 101 is distributed on the top side of the first cabinet 100, a higher IP protection level is required for the first fan 10. In actual situations, the position and number of the first air inlet 103 and the first air outlet 104 can be adjusted according to the heat dissipation requirements.

[0112] As shown in FIG4 , in some embodiments, the first air outlet 104 is only provided on the top side of the first cabinet 100 , for example, the first air outlet 104 is located in the middle of the top side of the first cabinet 100 . In this case, the first air inlet 103 is provided on the front and / or rear side of the first cabinet 100 .

[0113] The positions of the first air inlet 103 and the first air outlet 104 in FIG. 4 can be interchanged, and the structure after the interchange is shown in FIG. 5 .

[0114] As shown in FIG6 , in some embodiments, one first air inlet 103 is located at the front side of the first cabinet 100, and another first air inlet 103 is located at the rear side of the first cabinet 100. Both first air outlets 104 are located on the top side of the first cabinet 100, with one first air outlet 104 located on the top side of the first cabinet 100 near the front, and the other first air outlet 104 located on the top side of the first cabinet 100 near the rear. This increases the number of air inlets and outlets in the heat dissipation cavity 101, effectively increasing the ventilation volume of the heat dissipation cavity 101 and improving the heat dissipation effect and efficiency.

[0115] It should be noted that, in the above embodiment, the number of the first air inlets 103 and the first air outlets 104 can be adjusted according to actual conditions and is not limited to two first air inlets 103 and two first air outlets 104 .

[0116] The positions of the first air inlet 103 and the first air outlet 104 in FIG. 6 can be interchanged, and the structure after the interchange is shown in FIG. 7 .

[0117] In the above embodiment, the positions of the first air outlets 104 can be increased. As shown in FIG8 , based on the structure shown in FIG6 , at least one first air outlet 104 is added, and the added first air outlet 104 is located at the rear side of the first cabinet 100 .

[0118] It should be noted that, in the air intake method shown in FIG. 8 , the positions of the first air inlet 103 and the first air outlet 104 can be interchanged.

[0119] The air inlet and outlet of the heat dissipation cavity 101 can also be set in other locations, not limited to the left, right, and top positions mentioned above. As shown in Figure 9, in some embodiments, the air inlet of the heat dissipation cavity 101 also includes a second air inlet 105, which is located on the left and right sides of the first cabinet 100. It is understood that the second air inlet 105 and the first air inlet 103 are located on different sides of the first cabinet 100. This effectively increases the air intake of the heat dissipation cavity 101, which is conducive to improving the heat dissipation effect and efficiency.

[0120] The second air inlet 105 may also be provided only on the left or right side of the first cabinet 100 , and is not limited to the air intake arrangement shown in FIG. 9 .

[0121] In some other embodiments, the air outlet of the heat dissipation cavity 101 may also include a second air outlet (not shown in the figure), the second air outlet being located on the left and / or right side of the first cabinet 100, and the second air outlet and the first air outlet 104 being located on different sides of the first cabinet 100. In this way, the air volume of the heat dissipation cavity 101 is effectively increased, which is conducive to improving the heat dissipation effect and heat dissipation efficiency.

[0122] It should be noted that the position of the second air outlet is the same as the position of the second air inlet 105 in FIG. 9 .

[0123] In some other embodiments, the air inlet of the heat dissipation cavity 101 may include only the second air inlet 105 , or the air outlet of the heat dissipation cavity 101 may include only the second air outlet, which is not limited to the above embodiments.

[0124] In some embodiments, to prevent the air inlet and outlet of the heat dissipation cavity 101 from interfering with each other, the air inlet and outlet of the heat dissipation cavity 101 can be located on different sides of the first cabinet 100, as shown in Figures 1 and 3-7. Of course, at least one air inlet and at least one air outlet of the heat dissipation cavity 101 can be located on the same side of the first cabinet 100.

[0125] In actual situations, the positions and numbers of the air inlets and outlets of the heat dissipation cavity 101 are selected according to actual situations, and are not limited in this embodiment.

[0126] In order to facilitate the flow of gas through the heat dissipation cavity 101, a first fan 10 is provided in the heat dissipation cavity 101. The specific position of the first fan 10 is selected according to actual conditions and is not limited in this embodiment.

[0127] For ease of maintenance, the first fan 10 can be selected to be set at the top of the heat dissipation cavity 101, for example, the first fan 10 is located at the top of the heat dissipation cavity 101 and close to the front side, or the first fan 10 is located at the top of the heat dissipation cavity 101 and close to the rear side, or the first fan 10 is located at the top of the heat dissipation cavity 101 and in the middle position between the front side and the rear side.

[0128] As shown in Figure 1, the second cabinet 200 includes a DC distribution cavity 201, an AC distribution cavity 202, and a filter reactor cavity 203. The DC distribution cavity 201 is used to accommodate the DC distribution part 2, the AC distribution cavity 202 is used to accommodate the AC distribution part 3, and the filter reactor cavity 203 is used to accommodate the reactor 4.

[0129] The DC distribution cavity 201 and the AC distribution cavity 202 are respectively located on both sides of the filter reactor cavity 203, that is, the filter reactor cavity 203 is located between the DC distribution cavity 201 and the AC distribution cavity 202. The positions of the DC distribution cavity 201 and the AC distribution cavity 202 can be interchanged.

[0130] Of course, the DC distribution cavity 201 and the AC distribution cavity 202 can be located on the same side of the filter reactor cavity 203. For example, in Figure 1, the DC distribution cavity 201 and the AC distribution cavity 202 are both located on the left side of the filter reactor cavity 203. The DC distribution cavity 201 and the AC distribution cavity 202 can be distributed sequentially along the horizontal direction or along the vertical direction. The horizontal direction and the vertical direction are perpendicular, and both are perpendicular to the vertical direction. The vertical direction is the height direction of the second cabinet 200.

[0131] The heat generated by the reactor in the inverter is relatively high and concentrated. Because the reactor 4 itself has a high level of protection, it can come into direct contact with the air outside the filter reactor cavity 203. Therefore, the filter reactor cavity 203 is used to allow air to flow through it to cool the reactor 4. It is understood that the air entering the filter reactor cavity 203 is air outside the filter reactor cavity 203, such as air outside the entire inverter or air within other cavities in the inverter other than the filter reactor cavity 203.

[0132] In the above structure, the reactor 4 adopts high-volume forced air cooling to dissipate heat. The filter reactor cavity 203 has an air inlet and an air outlet. In this embodiment, the air inlet of the filter reactor cavity 203 includes a third air inlet 204, and the air outlet of the filter reactor cavity 203 includes a third air outlet 205.

[0133] The third air inlet 204 is located at the bottom of the filter reactor cavity 203, and the third air outlet 205 is located on one side of the top of the filter reactor cavity 203. For example, the third air outlet 205 is located on the side of the top of the filter reactor cavity 203 close to the AC power distribution cavity 202. Of course, the third air outlet 205 can also be located on the side of the top of the filter reactor cavity 203 close to the DC power distribution cavity 201. In addition, the positions of the third air inlet 204 and the third air outlet 205 can be interchanged.

[0134] It should be noted that the dotted arrow in the second cabinet 200 in FIG1 indicates the direction of air flow in the filter reactor cavity 203 . The direction indicated by the dotted arrow is only an approximate direction and is only schematic, and is not absolute.

[0135] To prevent the air inlet and air outlet of the filter reactor cavity 203 from affecting each other, the air inlet and air outlet of the filter reactor cavity 203 are located on different sides of the second cabinet 200. Of course, the air inlet and air outlet of the filter reactor cavity 203 can also be located on the same side of the second cabinet 200, and are not limited to the above structure.

[0136] To facilitate air flow through the filter reactor cavity 203, the filter reactor cavity 203 is provided with a second fan 7. The position of the second fan 7 is selected according to actual conditions. For example, the second fan 7 can be located at the third air inlet 204, the second fan 7 can be located near the third air inlet 204, the second fan 7 can be located at the third air outlet 205, or the second fan 7 can be located near the third air outlet 205. This embodiment is not limited to this.

[0137] Both the heat dissipation cavity 101 and the filter reactor cavity 203 require air inlet and outlet. To prevent the heat dissipation cavity 101 and the filter reactor cavity 203 from interfering with each other, the air outlet of the heat dissipation cavity 101 and the air inlet of the filter reactor cavity 203 can be located on different sides of a cabinet (the first cabinet 100 and the second cabinet 200 can both be referred to as cabinets), and the air outlet of the filter reactor cavity 203 and the air inlet of the heat dissipation cavity 101 can be located on different sides of the cabinet.

[0138] In the above structure, the air inlet of the heat dissipation cavity 101 and the air inlet of the filter reactor cavity 203 can be located on the same side of the cabinet, or the air inlet of the heat dissipation cavity 101 and the air inlet of the filter reactor cavity 203 can be located on different sides of the cabinet. Accordingly, the air outlet of the heat dissipation cavity 101 and the air outlet of the filter reactor cavity 203 can be located on the same side of the cabinet, or the air outlet of the heat dissipation cavity 101 and the air outlet of the filter reactor cavity 203 can be located on different sides of the cabinet.

[0139] Of course, without considering the mutual influence between the heat dissipation cavity 101 and the filter inductor cavity 203, the air outlet of the heat dissipation cavity 101 and the air inlet of the filter inductor cavity 203 can be selected to be located on the same side of the cabinet, and / or the air outlet of the filter inductor cavity 203 and the air inlet of the heat dissipation cavity 101 can be located on the same side of the cabinet.

[0140] In actual situations, other methods may also be used to cool the reactor 4 , and are not limited to the air cooling mentioned above.

[0141] Because the components within the DC distribution section 2 and the AC distribution section 3 have relatively low protection levels, to improve the protection levels of the DC distribution section 2 and the AC distribution section 3, the DC distribution cavity 201 and the filter reactor cavity 203 can be relatively isolated. This ensures that the protection levels of the DC distribution cavity 201 and the filter reactor cavity 203 are different, and the protection level of the DC distribution cavity 201 is higher than the protection level of the filter reactor cavity 203. The AC distribution cavity 202 and the filter reactor cavity 203 can be relatively isolated. This ensures that the protection levels of the AC distribution cavity 202 and the filter reactor cavity 203 are different, and the protection level of the AC distribution cavity 202 is higher than the protection level of the filter reactor cavity 203. The filter reactor cavity 203 can be referred to as a low-protection cavity, and both the DC distribution cavity 201 and the AC distribution cavity 202 can be referred to as high-protection cavities.

[0142] Based on the fact that the electronic cavity 102, the DC distribution cavity 201, and the AC distribution cavity 202 are all high-protection cavities, the DC distribution cavity 201 and the electronic cavity 102 can be connected, and the AC distribution cavity 202 and the electronic cavity 102 can be connected. Moreover, the DC distribution cavity 201 and the AC distribution cavity 202 are connected through the first connecting channel 5. In this way, the DC distribution cavity 201, the first connecting channel 5, the AC distribution cavity 202, and the electronic cavity 102 are connected end to end in sequence, thereby forming a first circulation air duct. It can be understood that the entire DC distribution cavity 201 forms part of the first circulation air duct, and the entire AC distribution cavity 202 forms part of the first circulation air duct. In order to improve the heat dissipation effect, the first circulation air duct can be selected as a closed air duct, that is, the first circulation air duct is not connected to the outside. In actual practice, the first circulation air duct can also be selected to be connected to its external environment, as long as it does not affect the flow of gas in the first circulation air duct along the set direction.

[0143] It should be noted that the solid arrow in FIG1 indicates the direction of air flow in the first circulation air duct. The direction indicated by the solid arrow is only an approximate direction and is only schematic, and is not absolute.

[0144] In the above structure, the heat dissipation of the DC distribution part 2 is coupled with the heat dissipation of the components in the electronic cavity 102, and the heat dissipation of the AC distribution part 3 is coupled with the heat dissipation of the components in the electronic cavity 102. Compared with the prior art in which the first cabinet and the second cabinet dissipate heat separately (each modular component dissipates heat independently), the heat dissipation cost is reduced; moreover, the components in the electronic cavity 102, the DC distribution part 2 and the AC distribution part 3 are all in the closed first circulation air duct, which ensures the protection requirements of the components in the electronic cavity 102, the DC distribution part 2 and the AC distribution part 3, thereby improving the protection reliability of the entire inverter.

[0145] Moreover, in the above structure, the power module can be cooled by the air in the first circulation duct, and the power module can also be cooled by the air in the heat dissipation cavity 101, thereby realizing dual heat dissipation of the power module and effectively improving the heat dissipation efficiency and heat dissipation effect of the power module.

[0146] The first connecting channel 5 is located at one end of the DC distribution cavity 201 away from the electronic cavity 102, and at one end of the AC distribution cavity 202 away from the electronic cavity 102. It is understood that the first connecting channel 5 is located on one side of the bottom of the DC distribution cavity 201 and also on one side of the bottom of the AC distribution cavity 202, that is, the first connecting channel 5 is located at the bottom of the second cabinet 200. The air duct within the DC distribution cavity 201 extends from the top of the DC distribution cavity 201 to the bottom end away from the DC distribution cavity 201, and the air duct within the AC distribution cavity 202 extends from the top of the AC distribution cavity 202 to the bottom end of the AC distribution cavity 202.

[0147] When the third air outlet 205 of the filter reactor cavity 203 is located at the top of the filter reactor cavity 203, near the side of the AC power distribution cavity 202, to facilitate communication between the AC power distribution cavity 202 and the electronic cavity 102, the AC power distribution cavity 202 and the electronic cavity 102 can be connected via the second connecting channel 6. In this case, the DC power distribution cavity 201, the first connecting channel 5, the AC power distribution cavity 202, the second connecting channel 6, and the electronic cavity 102 are connected end to end to form a first circulation air duct.

[0148] The second connecting channel 6 is located at one end of the AC distribution cavity 202 close to the electronic cavity 102, that is, the second connecting channel 6 is located at the top of the AC distribution cavity 202. It can be understood that the second connecting channel 6 is located at the top of the second cabinet 200 and close to one side of the AC distribution cavity 202.

[0149] As shown in Figure 1, the third air inlet 204, the first connecting channel 5, the inductor 4, the second connecting channel 6 and the third air outlet 205 are distributed in sequence; or, as shown in Figure 10, the third air inlet 204, the second connecting channel 6, the inductor 4, the first connecting channel 5 and the third air outlet 205 are distributed in sequence.

[0150] In actual situations, the DC distribution cavity 201 and the AC distribution cavity 202 may be connected to the electronic cavity 102 in other ways to form a first circulation air duct, and are not limited to the first connecting channel 5 and the second connecting channel 6 mentioned above.

[0151] To ensure air circulation within the first circulation duct, fans are provided within the first circulation duct. For example, a third fan 1, a fourth fan 8, and a fifth fan 9 are provided within the first circulation duct. The third fan 1 is located at the end of the DC distribution cavity 201 close to the electronic cavity 102, the fourth fan 8 is located at the end of the electronic cavity 102 close to the AC distribution cavity 202, and the fifth fan 9 is located at the end of the electronic cavity 102 away from the DC distribution cavity 201 and the end of the electronic cavity 102 away from the AC distribution cavity 202.

[0152] In actual situations, the positions and numbers of the third fan 1, the fourth fan 8 and the fifth fan 9 can be adjusted according to actual needs; and other fans can be added or at least one of the third fan 1, the fourth fan 8 and the fifth fan 9 can be reduced according to actual needs.

[0153] The electronic cavity 102 contains a large number of components. To improve heat dissipation and efficiency, the interior of the electronic cavity 102 can be divided into two side-by-side air ducts. This allows the air flowing out of the AC distribution cavity 202 to enter the electronic cavity 102 and then be divided into two paths. The two airflows flow through the electronic cavity 102 and then converge into the DC distribution cavity 201. This allows air to flow through as many components in each electronic cavity 102 as possible, thereby improving heat dissipation.

[0154] In actual situations, the air entering the electronic cavity 102 may be divided into one path or at least three paths, and is not limited to the above structure.

[0155] Since the DC power distribution cavity 201, the AC power distribution cavity 202 and the electronic cavity 102 form a first circulation air duct, the air in the first circulation air duct will gradually heat up. In order to ensure the normal operation of the components in the first circulation air duct, the air in the first circulation air duct needs to be cooled. Based on this, a first heat exchanger (not shown in the figure) is provided in the second cabinet 200. The first heat exchanger is used to exchange heat between the air in the first circulation air duct and the air flowing through the filter reactor cavity 203 to cool the air in the first circulation air duct. In this way, the heat dissipation of the components in the first circulation air duct and the heat dissipation of the components in the filter reactor cavity 203 are also coupled, further reducing the heat dissipation cost.

[0156] In this embodiment, the first heat exchanger is an air-to-air heat exchanger. It can be understood that the first heat exchanger has a first heat exchange channel and a second heat exchange channel capable of performing heat exchange.

[0157] The first heat exchanger may be arranged at the location where the first connecting channel 5 is located and / or at the location where the second connecting channel 6 is located.

[0158] Taking the first heat exchanger positioned at the location of the first connecting channel 5 as an example, as shown in Figure 1, the first heat exchange channel forms the first connecting channel 5, enabling the first heat exchange channel to be serially connected to the first circulating air duct, and the second heat exchange channel to be serially connected to the air duct of the filter reactor cavity 203. In this way, when air flows through the second heat exchange channel of the first heat exchanger, it can cool the gas within the first heat exchange channel, that is, cool the gas within the first circulating air duct, thereby improving the heat dissipation effect of the components within the first circulating air duct. To improve heat dissipation efficiency, air can be selected to flow through the second heat exchange channel of the first heat exchanger before flowing through the reactor 4. In this case, the second heat exchange channel of the first heat exchanger is located between the third air inlet 204 of the filter reactor cavity 203 and the reactor 4. It is understandable that the first heat exchanger is located between the third air inlet 204 of the filter reactor cavity 203 and the reactor 4. Since the first connecting channel 5 is located at the bottom of the second cabinet 200, the third air inlet 204 is also located at the bottom of the second cabinet 200.

[0159] It should be noted that, in the above structure, the first heat exchange channel can be understood as a structure of the first connecting channel 5 .

[0160] Taking the first heat exchanger as an example, which is arranged at the position where the second connecting channel 6 is located, as shown in Figure 10, the first heat exchange channel forms the second connecting channel 6 to realize that the first heat exchange channel is connected in series in the first circulation air duct, and the second heat exchange channel is connected in series in the air duct of the filter reactor cavity 203. In this way, when the air flows through the second heat exchange channel of the first heat exchanger, it can cool the gas in the first heat exchange channel, that is, cool the gas in the first circulation air duct, thereby improving the heat dissipation effect of the components in the first circulation air duct. In order to improve the heat dissipation efficiency, the air can be selected to flow through the second heat exchange channel of the first heat exchanger first and then through the reactor 4. In this case, the second heat exchange channel of the first heat exchanger is located between the third air inlet 204 of the filter reactor cavity 203 and the reactor 4. It can be understood that the first heat exchanger is located between the third air inlet 204 of the filter reactor cavity 203 and the reactor 4. Since the second connecting channel 6 is located at the top of the second cabinet 200 and close to one side of the AC power distribution cavity 202 , the third air inlet 204 is also located at the top of the second cabinet 200 and close to one side of the AC power distribution cavity 202 .

[0161] It should be noted that, in the above structure, the first heat exchange channel can be understood as a structure of the second connecting channel 6 .

[0162] In the case where the first heat exchanger is arranged between the third air inlet 204 of the filter reactor cavity 203 and the reactor 4, the second fan 7 can be arranged at the third air outlet 205 of the filter reactor cavity 203. Of course, the second fan 7 can also be selected to be arranged at the third air inlet 204 of the filter reactor cavity 203. The above-mentioned first heat exchanger can also be of other types and is not limited to the above-mentioned structure. In some other examples, the first heat exchanger can be selected to have only one heat exchange channel (which can be called the first heat exchange channel), the outer surface of the first heat exchanger can exchange heat with the first heat exchange channel, the first heat exchanger is placed in the filter reactor cavity 203, the first heat exchange channel of the first heat exchanger is connected in series in the first circulation air duct, and the gas in the filter reactor cavity 203 directly flows through the outer surface of the first heat exchanger to cool the gas in the first heat exchange channel, thereby cooling the gas in the first circulation air duct. When the first heat exchanger is arranged in the first connecting channel 5, the first heat exchange channel of the first heat exchanger can be understood as a structure of the first connecting channel 5; when the first heat exchanger is arranged in the second connecting channel 6, the first heat exchange channel of the first heat exchanger can be understood as a structure of the second connecting channel 6.

[0163] In actual practice, more than two first heat exchangers may be provided, with at least one first heat exchanger provided at the first connecting channel 5 and at least one first heat exchanger provided at the second connecting channel 6. For example, in the structures shown in FIG1 and FIG10 , two first heat exchangers may be provided, with one first heat exchanger provided at the location of the first connecting channel 5 and the other first heat exchanger provided at the location of the second connecting channel 6.

[0164] Example 2

[0165] The heat dissipation structure of the inverter provided in the second embodiment differs from that in the first embodiment mainly in the different circulation paths of the first circulating air duct, particularly in the different air duct structures in the DC distribution cavity 201 and the AC distribution cavity 202 .

[0166] As shown in Figures 11-14, in this second embodiment, the DC distribution chamber 201 includes a first DC sub-duct 2011 and a second DC sub-duct 2012 connected in parallel, and the AC distribution chamber 202 includes a first AC sub-duct 2021 and a second AC sub-duct 2022 connected in parallel; wherein the first DC sub-duct 2011 is connected to the first AC sub-duct 2021, and the second DC sub-duct 2012 is connected to the second AC sub-duct 2022. Thus, the first circulating air duct has two parallel branches in the second cabinet 200: one branch includes the first DC sub-duct 2011 and the first AC sub-duct 2021, and the other branch includes the second DC sub-duct 2012 and the second AC sub-duct 2022.

[0167] In the second embodiment, since the first circulating air duct has two parallel branches in the second cabinet 200, air can flow through the various components in the DC distribution cavity 201 and the various components in the AC distribution cavity 202 as much as possible, effectively improving the heat dissipation effect.

[0168] In the second embodiment, the connection position of the first DC air branch duct 2011 and the first AC air branch duct 2021, and the connection position of the second DC air branch duct 2012 and the second AC air branch duct 2022 can be selected according to actual conditions.

[0169] As shown in Figures 11 and 13, in some embodiments, the connecting position of the first DC branch air duct 2011 and the first AC branch air duct 2021, as well as the connecting position of the second DC branch air duct 2012 and the second AC branch air duct 2022 are both located between the top and bottom ends of the DC distribution cavity 201 and also between the top and bottom ends of the AC distribution cavity 202; wherein, the second DC branch air duct 2012 passes through the bottom end of the DC distribution cavity 201, and the second AC branch air duct 2022 passes through the bottom end of the AC distribution cavity 202.

[0170] As shown in Figure 11, the first DC sub-duct 2011 and the first AC sub-duct 2021, as well as the second DC sub-duct 2012 and the second AC sub-duct 2022 can be selected to be connected through a common first connecting channel 5; as shown in Figure 13, the first DC sub-duct 2011 and the first AC sub-duct 2021, as well as the second DC sub-duct 2012 and the second AC sub-duct 2022 can also be selected to be connected through different first connecting channels 5.

[0171] As shown in Figures 11 and 13, the top of the AC distribution cavity 202 is connected to the electronic cavity 102 through the second connecting channel 6; the air inlet, the second connecting channel 6, the first connecting channel 5 and the reactor 4 of the filter inductor cavity 203 are distributed in sequence along the airflow direction in the filter inductor cavity 203; wherein, at least one first heat exchanger is arranged at each first connecting channel 5, and / or at least one first heat exchanger is arranged at the second connecting channel 6.

[0172] It should be noted that for a specific understanding of at least one first heat exchanger being provided at each first connecting channel 5 and at least one first heat exchanger being provided at the second connecting channel 6 , reference may be made to the first embodiment, which will not be repeated here.

[0173] In the above embodiment, air flows sequentially through the second connecting channel 6, the first connecting channel 5, and the reactor 4. This prioritization of air flow through the second connecting channel 6 and then the first connecting channel 5 allows for better cooling of the air within the first circulation duct, thereby improving the heat dissipation efficiency of components within the first circulation duct. When the first heat exchanger is located at the first connecting channel 5 and the second connecting channel 6, the heat exchange area is increased, improving heat exchange efficiency.

[0174] In the above structure, part of the air entering the DC distribution cavity flows through the first DC branch air duct 2011 of the DC distribution cavity 201 and enters the first AC branch air duct 2021 through the first connecting channel 5; the other part of the air flows through the second DC branch air duct 2012 of the DC distribution cavity 201 and enters the second AC branch air duct 2022 through the first connecting channel 5; the air flowing out through the first AC branch air duct 2021 and the air flowing out through the second AC branch air duct 2022 merge in the second connecting channel 6, and then flow into the electronic cavity 102.

[0175] It can be seen from the air flow path in the above-mentioned first circulation air duct that the circulation of the air flow in the first circulation air duct is realized, and the air flow through the bottom of the DC distribution cavity 201 and the bottom of the AC distribution cavity 202 is also realized, thereby improving the heat exchange effect and heat exchange efficiency of the DC distribution part 2 and the AC distribution part 3.

[0176] To prevent a short circuit between the first DC branch air duct 2011 and the second DC branch air duct 2012 at the first connecting channel 5, a first partition 12 may be optionally provided in the DC power distribution chamber 201. The first partition 12 separates the end of the first DC branch air duct 2011 connected to the first connecting channel 5 from the end of the second DC branch air duct 2012 connected to the first connecting channel 5. It will be appreciated that the first partition 12 also separates the connection port of the first connecting channel 5 connecting to the first DC branch air duct 2011 and the connection port of the first connecting channel 5 connecting to the second DC branch air duct 2012.

[0177] Accordingly, to prevent a short circuit between the first AC sub-duct 2021 and the second AC sub-duct 2022 at the first connecting channel 5, a second partition 13 can be optionally provided in the AC power distribution cavity 202. The second partition 13 separates the end of the first AC sub-duct 2021 connected to the first connecting channel 5 from the end of the second AC sub-duct 2022 connected to the first connecting channel 5. It is understood that the first partition 12 also separates the connection port of the first connecting channel 5 connecting to the first AC sub-duct 2021 and the connection port of the first connecting channel 5 connecting to the second AC sub-duct 2022.

[0178] For example, as shown in FIG11 , there is one first connecting channel 5 , and a first partition 12 separates the inlet of the first connecting channel 5 into two mutually unconnected upper and lower portions, while a second partition 13 separates the outlet of the first connecting channel 5 into two mutually unconnected upper and lower portions. As shown in FIG13 , there are two first connecting channels 5 . In this case, the first partition 12 separates the inlets of the two first connecting channels 5 , and the second partition 13 separates the outlets of the two first connecting channels 5 . One first connecting channel 5 connects the first DC air sub-duct 2011 and the first AC air sub-duct 2021 , while the other first connecting channel 5 connects the second DC air sub-duct 2021 and the second AC air sub-duct 2022 .

[0179] In the above embodiment, the number of first connecting channels 5 can be increased as needed. For example, the number of first connecting channels 5 is three, the first partition 12 separates two first connecting channels 5 from the inlet of another first connecting channel 5, and the second partition 13 separates two first connecting channels 5 from the outlet of another first connecting channel 5. Of course, the number of first connecting channels 5 can also be selected to be four or more, and the roles and functions of the first partition 12 and the second partition 13 can be adaptively adjusted, which will not be repeated here.

[0180] In this embodiment, the first DC sub-duct 2011 and the second DC sub-duct 2012 , as well as the first AC sub-duct 2021 and the second AC sub-duct 2022 may be formed by other methods, and are not limited to the method of using the first partition plate 12 and the second partition plate 13 .

[0181] In addition to the arrangement shown in Figures 11 and 13 of the first DC air duct 2011 and the second DC air duct 2012 being arranged vertically on the first partition 12, the first DC air duct 2011 and the second DC air duct 2012 can also be arranged in sequence in the longitudinal direction on the first partition 12, with the longitudinal direction being perpendicular to the vertical direction and perpendicular to the transverse direction. It is understood that the transverse direction is the direction in which the DC distribution cavity 201, the filter reactor cavity 203, and the AC distribution cavity 202 are sequentially arranged.

[0182] Correspondingly, at the second partition plate 13, the first AC sub-air duct 2021 and the second AC sub-air duct 2022 may be selected to be distributed in sequence in the longitudinal direction.

[0183] Of course, it is also possible to choose to have the first DC air duct 2011 and the second DC air duct 2012 distributed in other directions at the first partition 12, and the first AC air duct 2021 and the second AC air duct 2022 distributed in other directions at the second partition 13. This is not limited in this embodiment 2.

[0184] In the second embodiment, the connection position of the second DC air duct 2012 and the second AC air duct 2022 can also be located at other positions. As shown in Figure 14, in some other embodiments, the connection position of the first DC air duct 2011 and the first AC air duct 2021 is located between the top and bottom ends of the DC distribution cavity 201 and between the top and bottom ends of the AC distribution cavity 202; the connection position of the second DC air duct 2012 and the second AC air duct 2022 is located at the bottom end of the DC distribution cavity 201 and the bottom end of the AC distribution cavity 202.

[0185] In the above embodiment, the first DC air duct 2011 and the first AC air duct 2021 are connected through the first connecting channel 5, and the second DC air duct 2021 and the second AC air duct 2022 are connected through the third connecting channel 16; the AC power distribution cavity 202 is connected to the electronic cavity 102 through the second connecting channel 6. The air inlet (third air inlet 204) of the filter reactor cavity 203, the second connecting channel 6, the first connecting channel 5, the reactor 4 and the third connecting channel 16 are sequentially distributed along the airflow direction in the filter reactor cavity 203; at least one first heat exchanger is arranged at the first connecting channel 5, and / or at least one first heat exchanger is arranged at the third connecting channel 16, and / or at least one first heat exchanger is arranged at the second connecting channel 6.

[0186] It can be understood that the third connecting channel 16 is located at the bottom of the reactor 4 , and the third connecting channel 16 is also located at the bottom of the second cabinet 200 .

[0187] For the understanding of at least one first heat exchanger being provided at the first connecting channel 5 and at least one first heat exchanger being provided at the second connecting channel 6 , reference may be made to the first embodiment, which will not be described in detail here.

[0188] When at least one first heat exchanger is disposed at the third connecting channel 16, the first heat exchange channel of the first heat exchanger forms the third connecting channel to be serially connected to the first circulation air duct, and the second heat exchange channel of the first heat exchanger is serially connected to the air duct of the filter reactor cavity 203. This further increases the heat exchange area and improves the heat exchange efficiency.

[0189] In the second embodiment, in order to facilitate the flow of air through the second DC branch air duct 2012 and the second AC branch air duct 2022, a sixth fan 14 is provided at the bottom of the DC distribution cavity 201, and the sixth fan 14 is located in the second DC branch air duct 2012; a seventh fan 15 is also provided at the bottom of the AC distribution cavity 202, and the seventh fan 15 is located in the second AC branch air duct 2022.

[0190] The inlet and outlet of the first connecting channel 5 are interchanged, i.e., the outlet of the first connecting channel 5 communicates with the DC distribution chamber 201, while the inlet of the first connecting channel 5 communicates with the AC distribution chamber 202. Where the first and second partitions 12, 13 are provided, their roles and functions can be adaptively adjusted and will not be further described herein. Where the third connecting channel 16 is provided, the inlet and outlet of the third connecting channel 16 remain consistent with those of the first connecting channel 5.

[0191] In the second embodiment, other structures of the heat dissipation structure of the inverter and the heat exchange of its cavity can be referred to in the first embodiment and will not be described in detail here.

[0192] Example 3

[0193] The heat dissipation structure of the inverter provided in the third embodiment differs from that in the first embodiment primarily in the different circulation paths of the first circulating air duct, particularly the different air duct structures within the DC power distribution cavity 201 and the AC power distribution cavity 202. Furthermore, a second circulating air duct is added in the third embodiment.

[0194] In the third embodiment, as shown in Figures 15 to 20, the DC distribution cavity 201 includes a first DC branch air duct 2011 and a second DC branch air duct 2012, and the first DC branch air duct 2011 is closer to the electronic cavity 102 than the second DC branch air duct 2012; the AC distribution cavity 202 includes a first AC branch air duct 2021 and a second AC branch air duct 2022, and the first AC branch air duct 2021 is closer to the electronic cavity 102 than the second AC branch air duct 2022.

[0195] In the above structure, first DC sub-duct 2011 forms part of the first circulating air duct, and first AC sub-duct 2021 forms part of the first circulating air duct. Second DC sub-duct 2012 and second AC sub-duct 2022 communicate to form a second circulating air duct. In this case, at least one first heat exchanger is used to exchange heat between the air in the second circulating air duct and the air flowing through the filter reactor cavity 203.

[0196] In the third embodiment, the circulation path of the first circulation air duct is shortened, and accordingly, the circulation path of the second circulation air duct is also shortened, thereby effectively improving the heat dissipation effect; moreover, at least one first heat exchanger is used to perform heat exchange between the air in the second circulation air duct and the air flowing through the filter inductor cavity 203, thereby increasing the heat exchange area and further improving the heat dissipation efficiency and heat dissipation effect.

[0197] In this third embodiment, the first and second circulation air ducts are arranged in parallel. To simplify the structure and reduce the temperature difference between the first and second circulation air ducts, the first and second circulation air ducts can share a section of air duct, and at least one first heat exchanger can be located in the section of air duct shared by the first and second circulation air ducts. In this case, the first and second circulation air ducts share at least one first heat exchanger.

[0198] To facilitate the formation of the first and second circulation air ducts, the first DC sub-duct 2011 and the first AC sub-duct 2021, as well as the second DC sub-duct 2012 and the second AC sub-duct 2022, are all connected via the first connecting channel 5. The second DC sub-duct 2012 and the second AC sub-duct 2022 are also connected via the third connecting channel 16. The electronic cavity 102, the first DC sub-duct 2011, the first connecting channel 5, and the first AC sub-duct 2021 are sequentially connected end-to-end to form the first circulation air duct. The second DC sub-duct 2012, the first connecting channel 5, the second AC sub-duct 2022, and the third connecting channel 16 are sequentially connected end-to-end to form the second circulation air duct. In this case, the first and second circulation air ducts share the first connecting channel 5.

[0199] In this third embodiment, to facilitate air flow within the first and second circulation ducts, as shown in Figures 15, 17, 19, and 20, an eighth fan 21 is provided within the second cabinet 200. The eighth fan 21 can be located at either the outlet or inlet of the first connecting duct 5. This allows the first and second circulation ducts to share a single eighth fan 21, which helps reduce the number of fans and thus the cost of the fans. It also minimizes the space occupied within the second cabinet 200.

[0200] In order to facilitate the air flow in the first circulation air duct, a fan may be provided in the first circulation air duct. For the specific position and number of the fans, reference may be made to the first embodiment, which will not be described in detail here.

[0201] As shown in FIG20 , to facilitate air flow in the second circulation duct, a seventh fan 15 may be provided in the second circulation duct, and the seventh fan 15 is located in the second DC sub-duct 2012 and / or the second AC sub-duct 2022. Furthermore, the seventh fan 15 is located at the bottom of the second DC sub-duct 2012 and / or the bottom of the second AC sub-duct 2022, that is, the seventh fan 15 is located at the bottom of the second cabinet 200.

[0202] In actual situations, the number and positions of fans in the first and second circulation air ducts may be adjusted according to actual conditions, and this third embodiment does not limit this.

[0203] In the third embodiment, a first fan 10 is provided at the top of the heat dissipation cavity 101. As shown in FIG15 , the first fan 10 is located in the middle position of the top of the first cabinet 100 (between the front and rear sides); as shown in FIG17 , the first fan 10 is located at the top of the first cabinet 100 and close to the rear side; as shown in FIG19 , the first fan 10 is located at the top of the first cabinet 100 and close to the front side.

[0204] In the third embodiment, other structures of the heat dissipation structure of the inverter and the heat exchange of its cavity can be referred to the first and second embodiments, and will not be described in detail here.

[0205] Example 4

[0206] The heat dissipation structure of the inverter provided in the fourth embodiment differs from that in the first, second and third embodiments mainly in that the cavity forming the first circulating air duct is different.

[0207] In this fourth embodiment, as shown in Figure 21, the AC distribution cavity 202 and the electronic cavity 102 are connected to form a first circulation air duct, while the DC distribution cavity 201 and the electronic cavity 102 are not connected. The air inside the DC distribution cavity 201 is turbulent, thereby achieving heat dissipation. In actual practice, the DC distribution cavity 201 can be selected as a closed cavity.

[0208] In order to facilitate the communication between the AC power distribution cavity 202 and the electronic cavity 102 to form a first circulation air duct, the second cabinet 200 is provided with a fourth connecting channel 19 (ie, the second connecting channel 6 described above) and a fifth connecting channel 17 .

[0209] The outlet of the AC power distribution cavity 202 is connected to the inlet of the electronic cavity 102 via the fourth connecting channel 19 , and the outlet of the electronic cavity 102 is connected to the inlet of the AC power distribution cavity 202 via the fifth connecting channel 17 .

[0210] The fourth connecting channel 19 and the fifth connecting channel 17 are both located at the top of the AC power distribution cavity 202. Thus, the inlet and outlet of the AC power distribution cavity 202 are also located at the top of the AC power distribution cavity 202. To ensure that air flows through the bottom of the AC power distribution cavity 202 to improve heat dissipation, the AC power distribution cavity 202 is provided with a third partition 18 and a seventh fan 15; the third partition 18 separates the inlet and outlet of the AC power distribution cavity 202, and the seventh fan 15 is located at the bottom of the AC power distribution cavity 202.

[0211] To improve the separation effect, the third partition 18 extends from the top of the AC power distribution cavity 202 to the bottom of the AC power distribution cavity 202 ; the airflow on one side of the third partition 18 flows to the other side of the third partition 18 through the seventh fan 15 .

[0212] In actual situations, the positions of the fourth connecting channel 19 and the fifth connecting channel 17 can be interchanged, that is, the outlet of the AC distribution cavity 202 is connected to the inlet of the electronic cavity 102 through the fifth connecting channel 17, and the outlet of the electronic cavity 102 is connected to the inlet of the AC distribution cavity 202 through the fourth connecting channel 19.

[0213] In the above embodiment, to dissipate heat from the reactor 4, the third air inlet 204 of the filter reactor cavity 203 is located on one side of the top of the second cabinet 200. The third air inlet 204, the second connecting channel 6, the fourth connecting channel 19, and the reactor 4 are sequentially distributed along the airflow direction, and the first heat exchanger is disposed at the fourth connecting channel 19 and / or the fifth connecting channel 17. Thus, after air enters the filter reactor cavity 203 through the third air inlet 204, it flows sequentially through the fourth connecting channel 19, the fifth connecting channel 17, and the reactor 4 before being discharged from the third air outlet 205 of the filter reactor cavity 203.

[0214] In the above structure, the first heat exchanger is disposed at the fourth connecting channel 19, and the first heat exchange channel of the first heat exchanger serves as the fourth connecting channel 19 to be serially connected in the first circulation air duct, while the second heat exchange channel of the first heat exchanger is serially connected in the air duct of the AC power distribution cavity 202. Alternatively, the first heat exchanger is disposed at the fifth connecting channel 17, and the first heat exchange channel of the first heat exchanger serves as the fifth connecting channel 17 to be serially connected in the first circulation air duct, while the second heat exchange channel of the first heat exchanger is serially connected in the air duct of the AC power distribution cavity 202. In this way, air flowing through the second heat exchange channel of the first heat exchanger exchanges heat with the air in the first heat exchange channel, thereby dissipating heat from components in the first circulation air duct.

[0215] In order to improve the heat dissipation efficiency of the components in the first circulation air duct, it can be selected that the first heat exchanger is arranged at the fourth connecting channel 19 , or the first heat exchanger is arranged at the fourth connecting channel 19 and the fifth connecting channel 17 .

[0216] The above-mentioned first heat exchanger can be one or more than two, which can be selected according to actual conditions, and this embodiment 4 does not limit this.

[0217] In the above embodiment, the inlet and outlet of the electronic cavity 102 are both located at the bottom of the electronic cavity 102. To ensure the heat dissipation efficiency and effectiveness of the electronic cavity 102, the electronic cavity 102 is provided with a fifth partition that separates the inlet and outlet of the electronic cavity 102. Of course, other partitions may be used to separate the inlet and outlet of the electronic cavity 102 to ensure that air flows through the components in the electronic cavity 102 that require heat dissipation.

[0218] In order to facilitate air flow through the top of the electronic cavity 102, a fifth fan 9 is provided on the top of the electronic cavity 102. Under the action of the fifth fan, the air in the electronic cavity 102 flows from the inlet of the electronic cavity to the outlet of the electronic cavity 102.

[0219] In this fourth embodiment, air turbulence within the DC distribution cavity 201 is used to dissipate heat. To facilitate air turbulence within the DC distribution cavity 201, a third fan 1 is provided within the DC distribution cavity 201. The location of the third fan 1 is determined based on practical circumstances and is not limited in this third embodiment.

[0220] When the air turbulence inside the DC distribution cavity 201 cannot meet the heat dissipation requirements, the above-mentioned second cabinet 200 can be provided with a second heat exchanger (not shown in the figure), which has a first channel and a second channel capable of heat exchange. The first channel of the second heat exchanger is connected to the DC distribution cavity 201, and the second channel of the second heat exchanger is used for air to flow through.

[0221] It can be understood that the air entering the second channel of the second heat exchanger is the air outside the second channel, for example, the air outside the entire second cabinet. In this case, the second channel of the second heat exchanger is connected to the outside of the second cabinet 200.

[0222] In the above structure, the air exchanges heat with the air in the first channel when flowing through the second channel, thereby dissipating heat for the components in the DC distribution cavity 201, improving the heat dissipation efficiency and heat dissipation effect of the components in the DC distribution cavity 201, thereby meeting the heat dissipation requirements of the DC distribution cavity 201.

[0223] The second heat exchanger may be disposed on the door or other locations of the second cabinet body 200 , which is not limited in this embodiment 3.

[0224] The second heat exchanger may be one or more than two, and is selected according to the heat dissipation requirements of the DC power distribution cavity 201 , which is not limited in this embodiment three.

[0225] In this fourth embodiment, the DC distribution cavity 201 and the electronic cavity 102 can also be connected to form a first circulation air duct, while the AC distribution cavity 202 and the electronic cavity 102 are not connected. For example, the AC distribution cavity 202 is a closed cavity, and the air inside the AC distribution cavity 202 is turbulent to achieve heat dissipation. In this case, the design of the first circulation air duct and other structures can be adaptively adjusted and will not be further described herein.

[0226] In this fourth embodiment, other structures of the heat dissipation structure of the inverter and the heat exchange of its cavity can be referred to in the first, second and third embodiments, and will not be described in detail here.

[0227] Example 5

[0228] The heat dissipation structure of the inverter provided in the fifth embodiment differs from that of the first, second, third and fourth embodiments mainly in the internal structure of the heat dissipation cavity.

[0229] When the solutions provided in Examples 1, 2, 3 and 4 cannot meet the heat dissipation requirements of the electronic cavity 102, a third heat exchanger 20 is added to the heat dissipation cavity 101 as shown in Figures 22 and 23. The third heat exchanger 20 can be an air-to-air heat exchanger.

[0230] The third heat exchanger 20 has a first channel and a second channel, which are capable of heat exchange. The first channel is connected to the heat dissipation cavity 101, and the second channel is connected to the electronic cavity 102. In this way, the cold air flowing through the heat dissipation cavity 101 flows through the first channel, and while flowing through the first channel, the cold air exchanges heat with the second channel, thereby cooling the air in the second channel and thus cooling the components in the electronic cavity 102.

[0231] It should be noted that when the above-mentioned third heat exchanger 20 meets the requirements for heat dissipation in the electronic cavity 102, the first heat exchanger mentioned in Example 1, Example 2, Example 3 and Example 4 may no longer be provided, or the position and quantity of the first heat exchangers mentioned in Example 1, Example 2, Example 3 and Example 4 may be adjusted.

[0232] In actual situations, the third heat exchanger 20 may also be disposed in the electronic cavity 102 and is not limited to the heat dissipation cavity 101 .

[0233] In the fifth embodiment, other structures of the heat dissipation structure of the inverter and the heat exchange of its cavity can be referred to in the first, second, third and fourth embodiments, and will not be described in detail here.

[0234] The air-to-air heat exchangers described in Examples 1, 2, 3, 4, and 5 above may also be referred to as air-to-air heat exchangers. As shown in Figure 24 , the first heat exchange channel 01 and the second heat exchange channel 02 of the air-to-air heat exchanger may be orthogonal. Of course, other configurations of the first and second heat exchange channels are also possible, and are not limited to the configuration shown in Figure 24 .

[0235] Based on the heat dissipation structure of the inverter provided in the above embodiment, an embodiment of the present application further provides an inverter, which includes the heat dissipation structure of the inverter provided in the above embodiment.

[0236] Since the heat dissipation structure of the inverter provided in the above embodiment has the above technical effects, the above inverter includes the heat dissipation structure of the inverter provided in the above embodiment, and the above inverter also has the corresponding technical effects, which will not be described in detail herein.

[0237] The type of the above-mentioned inverter is selected according to actual conditions. For example, the inverter is a photovoltaic grid-connected inverter, which is not limited in the embodiments of the present application.

[0238] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present application. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A heat dissipation structure of an inverter, characterized in that: comprising a first cabinet and a second cabinet; The first cabinet includes a heat dissipation cavity and an electronic cavity, the electronic cavity is used to accommodate the inverter power module part, the heat dissipation cavity is used for air to flow through to cool the power module radiator, and the power module radiator is used to dissipate heat for the power module of the inverter power module part; The second cabinet includes a DC distribution cavity and an AC distribution cavity, the DC distribution cavity is used to accommodate a DC distribution part, and the AC distribution cavity is used to accommodate an AC distribution part. At least one of the DC distribution cavity and the AC distribution cavity is connected to the electronic cavity to form a first circulation air duct.

2. The heat dissipation structure of the inverter according to claim 1, characterized in that: The second cabinet further includes a filter reactor cavity, the filter reactor cavity is used to accommodate the reactor, and the filter reactor cavity is used for air to flow through to cool the reactor.

3. The heat dissipation structure of the inverter according to claim 2, characterized in that: The second cabinet further includes at least one first heat exchanger, and the at least one first heat exchanger is used to perform heat exchange between the air in the first circulation air duct and the air flowing through the filter reactor cavity.

4. The heat dissipation structure of the inverter according to claim 3, characterized in that: At least one of the first heat exchangers is located between the air inlet of the filter reactor cavity and the reactor.

5. The heat dissipation structure of the inverter according to claim 3 or 4, characterized in that: The DC power distribution cavity comprises a first DC air duct and a second DC air duct, wherein the first DC air duct is closer to the electronic cavity than the second DC air duct. The AC power distribution cavity comprises a first AC air duct and a second AC air duct, wherein the first AC air duct is closer to the electronic cavity than the second AC air duct. The first DC sub-air duct forms part of the first circulation air duct, and the first AC sub-air duct forms part of the first circulation air duct.

6. The heat dissipation structure of the inverter according to claim 5, characterized in that: The second DC sub-air duct and the second AC sub-air duct are connected to form a second circulation air duct; Wherein, at least one of the first heat exchangers is used to perform heat exchange between the air in the second circulation air duct and the air flowing through the filter reactor cavity.

7. The heat dissipation structure of the inverter according to claim 6, characterized in that: The first circulation air duct and the second circulation air duct share a section of the air duct, and at least one of the first heat exchangers is located at the section of the air duct shared by the first circulation air duct and the second circulation air duct.

8. The heat dissipation structure of the inverter according to claim 3 or 4, characterized in that: The electronic cavity, the DC power distribution cavity and the AC power distribution cavity are connected end to end in sequence to form the first circulation air duct.

9. The heat dissipation structure of the inverter according to claim 8, characterized in that: The air duct in the DC distribution cavity extends from the top of the DC distribution cavity to the bottom of the DC distribution cavity, and the air duct in the AC distribution cavity extends from the top of the AC distribution cavity to the bottom of the AC distribution cavity.

10. The heat dissipation structure of the inverter according to claim 9, characterized in that: The bottom end of the DC distribution cavity is connected to the bottom end of the AC distribution cavity through a first connection channel, and the top end of the DC distribution cavity or the top end of the AC distribution cavity is connected to the electronic cavity through a second connection channel; Among them, one of the first connecting channel and the second connecting channel is located between the air inlet of the filter reactor cavity and the reactor, and the other is located between the air outlet of the filter reactor cavity and the reactor.

11. The heat dissipation structure of the inverter according to claim 10, characterized in that: At least one of the first heat exchangers is arranged at the first connecting channel, and / or at least one of the first heat exchangers is arranged at the second connecting channel.

12. The heat dissipation structure of the inverter according to claim 8, characterized in that: The DC power distribution cavity comprises a first DC air duct and a second DC air duct connected in parallel, and the AC power distribution cavity comprises a first AC air duct and a second AC air duct connected in parallel; The first DC sub-air duct is connected to the first AC sub-air duct, and the second DC sub-air duct is connected to the second AC sub-air duct.

13. The heat dissipation structure of the inverter according to claim 12, characterized in that: The connecting position of the first DC sub-air duct and the first AC sub-air duct, and the connecting position of the second DC sub-air duct and the second AC sub-air duct are both located between the top and bottom ends of the DC power distribution cavity, and between the top and bottom ends of the AC power distribution cavity; The second DC air duct passes through the bottom of the DC power distribution cavity, and the second AC The branch air duct passes through the bottom end of the AC power distribution cavity.

14. The heat dissipation structure of the inverter according to claim 13, characterized in that: The first DC air sub-channel and the first AC air sub-channel, as well as the second DC air sub-channel and the second AC air sub-channel are connected through a common first connecting channel; or, the first DC air sub-channel and the first AC air sub-channel, as well as the second DC air sub-channel and the second AC air sub-channel are connected through different first connecting channels; The top of the DC power distribution cavity or the top of the AC power distribution cavity is connected to the electronic cavity through a second connecting channel; Wherein, the air inlet of the filter reactor cavity, the second connecting channel, the first connecting channel and the reactor are distributed in sequence along the air flow direction in the filter reactor cavity.

15. The heat dissipation structure of the inverter according to claim 14, characterized in that: At least one of the first heat exchangers is arranged at each of the first connecting channels, and / or at least one of the first heat exchangers is arranged at the second connecting channel.

16. The heat dissipation structure of the inverter according to claim 12, characterized in that: The communication position of the first DC air branch duct and the first AC air branch duct is located between the top and bottom of the DC power distribution cavity, and between the top and bottom of the AC power distribution cavity; The communicating position of the second DC sub-air duct and the second AC sub-air duct is located at the bottom end of the DC power distribution cavity and the bottom end of the AC power distribution cavity.

17. The heat dissipation structure of the inverter according to claim 16, characterized in that: The first DC air branch duct and the first AC air branch duct are connected via a first connecting channel, and the second DC air branch duct and the second AC air branch duct are connected via a third connecting channel; The top of the DC power distribution cavity or the top of the AC power distribution cavity is connected to the electronic cavity through a second connecting channel; Wherein, the air inlet of the filter reactor cavity, the second connecting channel, the first connecting channel, the reactor and the third connecting channel are distributed in sequence along the airflow direction in the filter reactor cavity.

18. The heat dissipation structure of the inverter according to claim 17, characterized in that: At least one of the first heat exchangers is disposed at the first connecting channel, and / or at least one of the first heat exchangers is disposed at the third connecting channel, and / or at least one of the first heat exchangers is disposed at the second connecting channel.

19. The heat dissipation structure of the inverter according to claim 3 or 4, characterized in that: One of the DC power distribution cavity and the AC power distribution cavity is connected to the electronic cavity to form a first circulation air duct, and the other is not connected to the electronic cavity; The second cabinet is provided with a fourth connecting channel and a fifth connecting channel; among the DC distribution cavity and the AC distribution cavity, one connected with the electronic cavity, the fourth connecting channel, the electronic cavity, and the fifth connecting channel are connected end to end in sequence to form a first circulation air duct.

20. The heat dissipation structure of the inverter according to claim 19, characterized in that: At least one of the first heat exchangers is disposed at the fourth connecting channel; and / or at least one of the first heat exchangers is disposed at the fifth connecting channel.

21. The heat dissipation structure of the inverter according to claim 19, characterized in that: The second cabinet is provided with a second heat exchanger, which has a first channel and a second channel capable of performing heat exchange; one of the DC distribution cavity and the AC distribution cavity that is not connected to the electronic cavity is connected to the first channel, and the second channel is used for air to flow through.

22. The heat dissipation structure of the inverter according to claim 2, characterized in that: The air inlet and the air outlet of the heat dissipation cavity are respectively located on different sides of the first cabinet, and the air inlet and the air outlet of the filter reactor cavity are respectively located on different sides of the second cabinet; the first cabinet and the second cabinet are both cabinets, the air outlet of the filter reactor cavity and the air inlet of the heat dissipation cavity are located on different sides of the cabinet, and the air outlet of the heat dissipation cavity and the air inlet of the filter reactor cavity are located on different sides of the cabinet; And / or, the DC power distribution cavity and the AC power distribution cavity are distributed on opposite sides of the filter reactance cavity; And / or, the DC power distribution cavity and the AC power distribution cavity are relatively isolated from the filter reactance cavity.

23. The heat dissipation structure of the inverter according to claim 1, characterized in that: The first cabinet is provided with a third heat exchanger, the third heat exchanger has a first channel and a second channel capable of performing heat exchange, the first channel is connected to the heat dissipation cavity, and the second channel is connected to the electronic cavity; And / or, the heat dissipation cavity and the electronic cavity are relatively isolated, and the first circulation air duct is a closed air duct; And / or, the electronic cavity is also used to accommodate a control circuit part; And / or, the first cabinet and the second cabinet are distributed in sequence along the vertical direction.

24. An inverter, characterized in that: The invention comprises a heat dissipation structure of an inverter as claimed in any one of claims 1 to 23.

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