Inverters and photovoltaic power generation systems

Abstract

This utility model provides an inverter and a photovoltaic power generation system. The inverter includes an inverter housing, inverter elements, and a heat exchanger. The inverter housing has a medium inlet, a heat source flow channel is provided inside the inverter housing, the inverter elements are disposed inside the inverter housing and are positioned on the heat source flow channel, and the heat exchanger is disposed inside the inverter housing. The heat exchanger has a first heat exchange channel and a second heat exchange channel inside, the inlet of the second heat exchange channel is formed on the heat exchanger, and the inlet of the second heat exchange channel abuts against the area of ​​the inverter housing with the medium inlet. The second heat exchange channel is connected to an external cooling source through the medium inlet, and the medium in the first heat exchange channel and the medium in the second heat exchange channel exchange heat. The heat source flow channel and the first heat exchange channel form a heat source circulation channel. Therefore, the inverter according to the embodiment of this utility model has the advantages of high heat exchange efficiency, simplified piping setup, and reduced cost.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic technology, specifically to an inverter and a photovoltaic power generation system having the inverter. Background Technology

[0002] In photovoltaic (PV) power generation systems, PV inverters convert input direct current (DC) to alternating current (AC). Typically, PV inverters contain power transistors (TUDs) with relatively high output power, resulting in significant heat generation. To address the heat dissipation issue of these power transistors, heat sinks are typically installed within the inverter's casing. However, conventional fan heat sinks suffer from poor heat dissipation. In contrast, heat exchangers require complex piping to connect to them, leading to larger inverter sizes and higher manufacturing costs. Utility Model Content

[0003] In view of this, the present invention aims to provide an inverter and a photovoltaic power generation system to solve the problem that inverters in the prior art cannot simultaneously balance heat dissipation capacity and manufacturing cost.

[0004] This utility model provides an inverter.

[0005] This utility model provides a photovoltaic power generation system.

[0006] The inverter of this utility model embodiment includes an inverter housing, inverter elements, and a heat exchanger.

[0007] The inverter housing has a receiving cavity and a medium inlet, and a heat source flow channel is provided inside the inverter housing; the inverter element is disposed inside the inverter housing and is disposed on the heat source flow channel; the heat exchanger is disposed inside the inverter housing, and the heat exchanger has a first heat exchange channel and a second heat exchange channel inside, the inlet of the second heat exchange channel is formed on the heat exchanger, the inlet of the second heat exchange channel abuts against the area on the inverter housing with the medium inlet, the second heat exchange channel is connected to an external cooling source through the medium inlet, and the medium in the first heat exchange channel and the medium in the second heat exchange channel exchange heat, and the heat source flow channel and the first heat exchange channel form a heat source circulation channel.

[0008] The inverter of this embodiment utilizes a heat exchanger installed inside the inverter housing to cool the inverter components. During operation, the inverter components generate a significant amount of heat; the internal heat exchanger effectively dissipates this heat, preventing localized overheating and maintaining a relatively stable internal temperature range. Test results show that the internal ambient temperature can be reduced by 10-15°C, demonstrating a good cooling effect. This improves the long-term operational reliability of the inverter and extends the lifespan of the inverter components.

[0009] Furthermore, by directly connecting the medium inlet to the heat exchanger inlet, energy loss during airflow is minimized. This direct connection lowers the airflow path and makes it more direct, contributing to a more uniform and efficient cooling effect and preventing localized overheating. It also reduces unnecessary bends and obstructions, allowing the cooling medium (such as air or other coolant) to enter the heat exchanger more smoothly, thereby improving overall heat dissipation efficiency. In addition, the direct connection allows for a more compact structure for both the heat exchanger and the medium inlet, reducing the need for intermediate pipes and other connections, thus simplifying the overall structure and lowering manufacturing costs and complexity.

[0010] Therefore, the inverter of this utility model embodiment has the advantages of high heat exchange efficiency, simplified piping setup and reduced cost.

[0011] In one embodiment, the inverter housing further has a medium outlet, and the heat exchanger includes a housing and a heat exchange element disposed within the housing. The connection between the heat exchange element and the housing divides the inverter housing into a first heat exchange channel and a second heat exchange channel that are independently disposed. The inlet and outlet of the second heat exchange channel are both disposed on the same side of the housing, and the outlet of the second heat exchange channel abuts against the area on the inverter housing that has a medium outlet.

[0012] In some embodiments, the outer casing includes a first cover plate, a frame plate, and a second cover plate. The frame plate has a first seal and a second seal disposed opposite to each other along the thickness direction of the heat exchanger. The first cover plate is sealed on the first seal, and the second cover plate is partially sealed on the second seal. The inlet and outlet of the second heat exchange channel are both disposed on the second cover plate, and the second cover plate abuts against the medium inlet of the inverter housing.

[0013] In some embodiments, the side of the frame plate away from the inlet of the first heat exchange channel along its length has the outlet of the first heat exchange channel, so that the first heat exchange channel is an L-shaped channel.

[0014] The inlet and outlet of the second heat exchange channel are both formed on the side of the frame plate where the second cover plate is installed. The inlet and outlet of the second heat exchange channel are spaced apart along the length direction of the frame plate. The inlet and outlet of the second heat exchange channel are respectively located in the region near the end of the length extension direction of the frame plate, so that the second heat exchange channel is a "U" shaped channel.

[0015] In some embodiments, the heat source flow channel includes a first inlet channel, a second inlet channel, and a confluence channel. The outlet of the first inlet channel, the first heat exchange channel, and the confluence channel are sequentially and circulatedly connected. The second inlet channel flows through the outer wall of the heat exchanger and is then circulatedly connected to the confluence channel.

[0016] In some embodiments, the heat exchange element includes a plurality of heat exchange substrates, which are spaced apart along the width direction of the heat exchanger. A plurality of heat exchange plate channels extending along the length direction of the frame plate are formed between adjacent heat exchange substrates, and the inlet of the second heat exchange channel is directly opposite to the plurality of heat exchange plate channels.

[0017] In some embodiments, the inverter further includes an external back cover, an air inlet grille, an air outlet grille, and an air inlet shroud. The air inlet shroud is disposed inside the external back cover, and the external back cover has an air inlet and an air outlet. The air inlet grille is disposed on the air inlet, the air outlet grille is disposed on the air outlet, and the air inlet shroud is connected between the air inlet grille and the inlet of the second heat exchange channel.

[0018] In some embodiments, the flow direction of the first heat exchange channel is opposite to that of the second heat exchange channel.

[0019] In some embodiments, the inverter further includes an induced draft fan and a blower, the blower being disposed between the inverter element and the inlet of the first heat exchange channel, and the induced draft fan being disposed between the heat exchanger and the outlet of the first heat exchange channel.

[0020] In some embodiments, the inverter further includes an internal air duct plate and an air duct cover, the internal air duct plate being disposed between the inverter element and the heat exchanger, and the air duct cover being disposed at the outlet of the second heat exchange channel.

[0021] The photovoltaic power generation system of this utility model embodiment includes a photovoltaic module and an inverter as described in any one of the above descriptions. The photovoltaic module is used to convert light energy into electrical energy, and the inverter is used to convert the current type of the photovoltaic module. Attached Figure Description

[0022] Figure 1This is a perspective view of the inverter according to an embodiment of the present invention.

[0023] Figure 2 This is a diagram showing the internal structure layout of the inverter according to an embodiment of this utility model.

[0024] Figure 3 This is an exploded view of an inverter according to an embodiment of the present invention.

[0025] Figure 4 This is another exploded view of the inverter according to an embodiment of the present invention.

[0026] Figure 5 This is a layout diagram of the inverter enclosure and inverter components according to an embodiment of the present invention.

[0027] Figure 6 This is a side view of the heat source circulation air passage in the inverter of this utility model embodiment.

[0028] Figure 7 This is a top view of the heat source circulation duct in the inverter according to an embodiment of the present invention. Figure 1 .

[0029] Figure 8 This is a top view of the heat source circulation duct in the inverter according to an embodiment of the present invention. Figure 2 .

[0030] Figure 9 This is a perspective view of the heat exchanger according to an embodiment of the present utility model.

[0031] Figure 10 This is another perspective view of the heat exchanger according to an embodiment of the present utility model.

[0032] Figure 11 This is a rear view of the heat exchanger according to an embodiment of the present utility model.

[0033] Figure 12 This is a front view of the heat exchanger according to an embodiment of the present invention.

[0034] Figure 13 This is an exploded view of the heat exchanger according to an embodiment of the present invention.

[0035] Figure 14 This is a flow diagram of the first heat exchange channel in the heat exchanger of this utility model embodiment.

[0036] Figure 15 This is a flow diagram of the second heat exchange channel in the heat exchanger of this utility model embodiment.

[0037] Explanation of reference numerals in the attached figures:

[0038] Inverter housing 1; First inlet channel 11; Second inlet channel 12; Combination channel 13;

[0039] Medium inlet 101; Medium outlet 102;

[0040] Inverter element 2;

[0041] Heat exchanger 3; First heat exchange channel 301; Second heat exchange channel 302;

[0042] Casing 31; First cover plate 311; Frame plate 312; Second cover plate 313; Sealing strip 314; Heat exchange element 32; Heat exchange substrate 321;

[0043] 41; 42;

[0044] External back cover 5;

[0045] Air inlet shroud 6; External fan 61;

[0046] Air intake grille 71; Air outlet grille 72;

[0047] Internal air duct plate 81; air duct cover 82. Detailed Implementation

[0048] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0049] The following is for reference. Figures 1-15 The inverter and photovoltaic power generation system of the present invention will be described by way of example.

[0050] The inverter of this utility model embodiment includes an inverter housing 1, inverter elements 2, and a heat exchanger 3.

[0051] The inverter housing 1 has a medium inlet 101 and a heat source flow channel inside the inverter housing 1. The inverter element 2 is located inside the inverter housing 1 and is positioned on the heat source flow channel. The heat exchanger 3 is located inside the inverter housing 1 and has a first heat exchange channel 301 and a second heat exchange channel 302 inside. The inlet of the second heat exchange channel 302 is formed on the heat exchanger 3 and abuts against the area on the inverter housing 1 with the medium inlet 101. The second heat exchange channel 302 is connected to an external cooling source through the medium inlet 101, and the medium in the first heat exchange channel 301 exchanges heat with the medium in the second heat exchange channel 302. The heat source flow channel and the first heat exchange channel 301 form a heat source circulation channel.

[0052] The inverter of this embodiment utilizes a heat exchanger 3 installed within the inverter housing 1 to cool the inverter components 2. During operation, the inverter components 2 generate a significant amount of heat; the internal heat exchanger 3 effectively dissipates this heat, preventing localized overheating and maintaining a relatively stable internal temperature range. Test results show that the internal ambient temperature can be reduced by 10-15°C, demonstrating a good cooling effect. This improves the long-term operational reliability of the inverter and extends the lifespan of the inverter components 2.

[0053] Furthermore, by directly connecting the medium inlet 101 to the inlet of the heat exchanger 3, energy loss during airflow can be minimized. This direct connection lowers the airflow path and makes it the most direct route, contributing to a more uniform and efficient cooling effect and preventing localized overheating. This also reduces unnecessary bends and obstructions, allowing the cooling medium (such as air or other coolant) to enter the heat exchanger 3 more smoothly, thereby improving overall heat dissipation efficiency. In addition, the direct connection allows for a more compact structure for the heat exchanger 3 and the medium inlet 101, reducing the need for intermediate pipes and other connections, thus simplifying the overall structure and reducing manufacturing costs and complexity.

[0054] Therefore, the inverter of this utility model embodiment has the advantages of high heat exchange efficiency, simplified piping setup and reduced cost.

[0055] Specifically, the first heat exchange channel 301 and the second heat exchange channel 302 are two independently configured channels in the heat exchanger 3. Since two gases at different temperatures exchange heat through the heat exchange plates inside the heat exchanger 3 via the first heat exchange channel 301 (hot gas) and the second heat exchange channel 302 (cold gas), heat is transferred from the high-temperature gas in the first heat exchange channel 301 to the low-temperature gas in the second heat exchange channel 302 until the temperatures of the two gases reach equilibrium, thus completing the heat exchange. Specifically, outside cold air can enter the second heat exchange channel 302 to remove excess heat from the heat exchanger 3. The gas inside the electronic cavity can carry excess heat from the electronic cavity to the first heat exchange channel 301 through the heat source flow channel. The heat in the first heat exchange channel 301 exchanges heat with the cold air in the second heat exchange channel 302 within the heat exchanger 3, and is then discharged outside the inverter housing 1 through the second heat exchange channel 302.

[0056] like Figure 2 , Figure 14 and Figure 15As shown, the inverter housing 1 also has a medium outlet 102. The heat exchanger 3 includes a housing 31 and a heat exchange element 32 disposed inside the housing 31. The connection between the heat exchange element 32 and the housing 31 divides the inverter housing 1 into an independently disposed first heat exchange channel 301 and a second heat exchange channel 302. The inlet and outlet of the second heat exchange channel 302 are both disposed on the same side of the housing 31. The outlet of the second heat exchange channel 302 abuts against the area on the inverter housing 1 that has the medium outlet 102.

[0057] The inverter of this utility model has a first heat exchange channel 301 and a second heat exchange channel 302 formed on the outer shell 31, and the outlet of the second heat exchange channel 302 abuts against the area on the inverter housing 1 with the medium outlet 102. The direct abutment allows the structure of the heat exchanger 3 and the medium outlet 102 to be more compact, further reducing the need for intermediate pipes and other connecting parts, thereby further reducing manufacturing costs and complexity.

[0058] like Figures 9 to 13 As shown, the outer casing 31 includes a first cover plate 311, a frame plate 312, and a second cover plate 313. The frame plate 312 is along the thickness direction of the heat exchanger 3 (e.g., Figure 9 The front and rear directions shown in the figure have a first seal and a second seal arranged opposite to each other. A first cover plate 311 is provided on the first seal and a second cover plate 313 is provided on the second seal so that the second cover plate 313 and the frame plate 312 form the inlet of the second heat exchange channel 302. The second cover plate 313 abuts against the medium inlet of the inverter box 1.

[0059] The inverter of this utility model uses the second cover plate 313 and the frame plate 312 to form the inlet of the second heat exchange channel 302. This structure simplifies the structural setup of the outer shell 31, reduces the need for intermediate pipes and other connecting parts, thereby reducing manufacturing costs and complexity.

[0060] like Figure 1 and Figure 14 As shown, the outer shell 31 is rectangular, and the side of the frame plate 312 away from the inlet of the first heat exchange channel 301 in the length direction has the outlet of the first heat exchange channel 301, so that the first heat exchange channel 301 is an L-shaped channel.

[0061] The inverter of this utility model has a relatively simple structure. By forming the outlet of the first heat exchange channel 301 on the side of the frame plate 312 away from the inlet of the first heat exchange channel 301 in the length direction, it not only helps to increase the length of the L-shaped channel and the airflow path, but also improves the overall heat exchange efficiency.

[0062] like Figure 1 and Figure 15As shown, the inlet and outlet of the second heat exchange channel 302 are both formed on the side of the frame plate 312 where the first cover plate 311 is provided. The inlet and outlet of the second heat exchange channel 302 are spaced apart along the length of the frame plate 312. The inlet and outlet of the second heat exchange channel 302 are respectively located in the region near the end of the length extension direction of the frame plate 312, so that the second heat exchange channel 302 is a "U" shaped channel.

[0063] The inverter of this embodiment of the invention arranges the inlet and outlet in the region near the end of the frame plate 312 along its length extension direction, so that the second heat exchange channel 302 is a U-shaped channel. Increasing the length of the U-shaped channel and the airflow path further improves the overall heat exchange efficiency.

[0064] like Figures 6 to 8 As shown, the heat source flow channel includes a first inlet channel 11, a second inlet channel 12, and a confluence channel 13. The outlet of the first inlet channel 11, the first heat exchange channel 301, and the confluence channel 13 are sequentially and circulatedly connected. The second inlet channel 12 flows through the outer wall of the heat exchanger 3 and is then circulatedly connected to the confluence channel 13.

[0065] The inverter of this embodiment of the invention is cyclically connected to the outlet of the first inlet channel 11, the first heat exchange channel 301, and the manifold 13. Heat exchange can occur through the heat exchange element 32 via the first heat exchange channel 301 and the second heat exchange channel 302. Simultaneously, the second inlet channel 12 flows through the outer wall of the heat exchanger 3 and then cyclically connects to the manifold 13, allowing for coordinated heat dissipation through the first heat exchange channel 301 and the side wall of the frame plate 312. Therefore, the inverter of this embodiment of the invention further improves heat dissipation efficiency.

[0066] Furthermore, the housing 31 also includes a plurality of sealing strips 314, which are disposed on the four side walls of the frame plate 312. For example, Figure 9 As shown, sealing strips 314 are provided on all four surfaces: front, back, left, and right. The four sealing strips 314 form rectangular sealing sides on the top and bottom surfaces, thus eliminating the need for separate top and bottom sealing strips 314. The frame plate 312 can be made of stainless steel, and the heat exchange element 32 is made of very thin aluminum foil stacked together.

[0067] like Figure 13 As shown, the heat exchange element 32 includes a plurality of heat exchange substrates 321, which are spaced apart along the width direction of the heat exchanger 3. A plurality of heat exchange plate channels extending along the length direction of the frame plate 312 are formed between adjacent heat exchange substrates 321. The inlet of the second heat exchange channel 302 is directly opposite to the plurality of heat exchange plate channels.

[0068] The inverter of this embodiment divides the heat exchange element 32 into multiple heat exchange substrates 321. Multiple heat exchange plate channels (such as air or other coolant) extending along the length of the frame plate 312 are formed between adjacent heat exchange substrates 321, providing a clear flow path. This ensures that the cooling medium can uniformly cover the surface of all heat exchange substrates 321, maximizing heat absorption and optimizing the airflow path. This, in turn, ensures uniform distribution of the cooling medium, reducing the occurrence of localized overheating. This is particularly important for protecting sensitive electronic components, as localized high temperatures can lead to device failure or shortened lifespan.

[0069] Optionally, multiple heat exchange substrates 321 are connected in sequence and arranged in a zigzag pattern, thereby separating the first heat exchange channel 301 and the second heat exchange channel 302.

[0070] like Figure 2 As shown, the inverter in this embodiment of the present invention further includes an external back cover 5, an air inlet grille 71, an air outlet grille 72, and an air inlet shroud 6. The air inlet shroud 6 is disposed inside the external back cover 5. The external back cover 5 is provided with an air inlet and an air outlet. The air inlet grille 71 is disposed on the air inlet, and the air outlet grille 72 is disposed on the air outlet. The air inlet shroud 6 is connected between the air inlet grille 71 and the inlet of the second heat exchange channel 302. During installation, the external back cover 5 can be oriented towards the wall.

[0071] The inverter of this embodiment features an external back cover 5 with an air inlet shroud 6 and an air outlet shroud, which guides the airflow and reduces the impact on other components during air intake and exhaust. This helps reduce wind noise within the inverter.

[0072] Furthermore, the inverter in this embodiment of the invention also includes an external fan 61, which is positioned close to the air inlet grille 71. Therefore, the inverter in this embodiment of the invention can increase the airflow into the air intake, thereby improving heat exchange efficiency.

[0073] Optionally, the air inlet shroud 6 and the air outlet shroud are vortex-shaped.

[0074] like Figure 2 As shown, the flow direction of the first heat exchange channel 301 is opposite to that of the second heat exchange channel 302.

[0075] In this embodiment of the inverter, the airflow direction of the first heat exchange channel 301 is set opposite to that of the second heat exchange channel 302. The air in the two channels exchanges heat within the cavity of the heat exchanger 3. Due to the significant temperature difference between the hot air in the first heat exchange channel 301 and the cold air in the second heat exchange channel 302, according to the second law of thermodynamics, heat will spontaneously transfer from the internal hot air to the external cold air. During this process, a portion of the total internal heat will be carried away by the external cold air and enter the external heat sink, thus reducing the total internal heat of the inverter and lowering its internal temperature.

[0076] Optionally, such as Figure 7 and Figure 8 As shown, the second heat exchange channel 302 is an annular channel located inside the inverter housing 1. Therefore, the inverter of this embodiment has the advantage of good cooling performance.

[0077] like Figures 2 to 6 As shown, the inverter in this embodiment of the present invention also includes an induced draft fan 41 and a blower 42. The blower 42 is disposed between the inverter element 2 and the inlet of the first heat exchange channel 301, and the induced draft fan 41 is disposed between the heat exchanger 3 and the outlet of the first heat exchange channel 301.

[0078] The inverter in this embodiment of the invention, driven by the induced draft fan 41 and the blower 42, can form a stable annular airflow, avoiding problems such as airflow short circuits, turbulence, or dead zones. The airflow flows orderly along the annular channel, accurately covering key heat-generating components (such as IGBT modules, capacitors, and inductors), achieving directional heat dissipation and improving cooling efficiency. Both the induced draft fan 41 and the blower 42 can actively drive the flow of the heat exchange medium, significantly improving the forced convection heat transfer coefficient.

[0079] like Figure 3 and Figure 5 As shown, the inverter in this embodiment of the present invention also includes an internal air duct plate 81 and an air duct cover 82. The internal air duct plate 81 is disposed between the inverter element 2 and the heat exchanger 3, and the air duct cover 82 is disposed on the outlet of the first heat exchange channel 301.

[0080] The inverter of this embodiment of the invention, through the internal air duct plate 81 and air duct cover 82, can guide the airflow, allowing the airflow to flow orderly along the annular channel and more accurately cover key heat-generating components. Therefore, the inverter of this embodiment of the invention further improves heat exchange efficiency.

[0081] The photovoltaic power generation system of this utility model includes a photovoltaic module and an inverter according to any one of the above, wherein the photovoltaic module is used to convert light energy into electrical energy, and the inverter is used to convert direct current from the photovoltaic module into alternating current.

[0082] The photovoltaic power generation system of this utility model has the advantages of improving heat exchange efficiency and simplifying structural settings.

[0083] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications or equivalent substitutions made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

[0084] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0085] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0086] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0087] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0088] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0089] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An inverter, characterized in that, an inverter box body, wherein the inverter box body is provided with a medium inlet, and a heat source flow channel is arranged in the inverter box body; an inverter element, wherein the inverter element is arranged in the inverter box body, and the inverter element is arranged on the heat source flow channel; a heat exchanger, wherein the heat exchanger is arranged in the inverter box body, a first heat exchange channel and a second heat exchange channel are arranged inside the heat exchanger, an inlet of the second heat exchange channel is formed on the heat exchanger, the inlet of the second heat exchange channel is in abutment with a region of the inverter box body where the medium inlet is located, the second heat exchange channel is communicated with an external cooling source through the medium inlet, a medium in the first heat exchange channel exchanges heat with a medium in the second heat exchange channel, and the heat source flow channel and the first heat exchange channel form a heat source circulation air channel.

2. The inverter according to claim 1, characterized in that, the inverter box body is further provided with a medium outlet, the heat exchanger comprises a housing and a heat exchange element arranged in the housing, the heat exchange element is connected with the housing to partition the inverter box body into the first heat exchange channel and the second heat exchange channel which are independently arranged, both the inlet and the outlet of the second heat exchange channel are arranged on the same side of the housing, and the outlet of the second heat exchange channel is in abutment with a region of the inverter box body where the medium outlet is located.

3. The inverter according to claim 2, characterized in that, the housing comprises a first cover plate, a frame plate and a second cover plate, the frame plate is provided with a first sealing opening and a second sealing opening which are oppositely arranged along the thickness direction of the heat exchanger, the first cover plate is sealed on the first sealing opening, the second cover plate is partially sealed on the second sealing opening, both the inlet and the outlet of the second heat exchange channel are arranged on the second cover plate, and the second cover plate is in abutment with the medium inlet of the inverter box body.

4. The inverter according to claim 3, characterized in that, on a side of the frame plate in the length direction away from the inlet of the first heat exchange channel, there is provided an outlet of the first heat exchange channel, so that the first heat exchange channel is an L-shaped channel; both the inlet of the second heat exchange channel and the outlet of the second heat exchange channel are formed on the side of the frame plate where the second cover plate is arranged, the inlet of the second heat exchange channel and the outlet of the second heat exchange channel are arranged at intervals along the length direction of the frame plate, and the inlet of the second heat exchange channel and the outlet of the second heat exchange channel are respectively arranged in regions close to end parts along the length extension direction of the frame plate, so that the second heat exchange channel is a "匚"-shaped channel.

5. The inverter according to claim 4, characterized in that, the heat source flow channel comprises a first inlet flow channel, a second inlet flow channel and a confluence flow channel, an outlet of the first inlet flow channel, the first heat exchange channel and the confluence flow channel are sequentially in circulating communication, and the second inlet flow channel is in circulating communication with the confluence flow channel after flowing through an outer wall surface of the heat exchanger.

6. The inverter according to claim 3, characterized in that, The heat exchange element includes a plurality of heat exchange substrates, which are spaced apart along the width direction of the heat exchanger. A plurality of heat exchange plate channels extending along the length direction of the frame plate are formed between adjacent heat exchange substrates. The inlet of the second heat exchange channel is directly opposite to the plurality of heat exchange plate channels.

7. The inverter according to claim 1, characterized in that, It also includes an outer back cover, an air inlet grille, an air outlet grille, and an air inlet hood. The air inlet hood is disposed inside the outer back cover. The outer back cover has an air inlet and an air outlet. The air inlet grille is disposed on the air inlet. The air outlet grille is disposed on the air outlet. The air inlet hood is connected between the air inlet grille and the inlet of the second heat exchange channel.

8. The inverter according to claim 1, characterized in that, The flow direction of the first heat exchange channel is opposite to that of the second heat exchange channel.

9. The inverter according to any one of claims 1-8, characterized in that, It also includes an induced draft fan and a blower, wherein the blower is disposed between the inverter element and the inlet of the first heat exchange channel, and the induced draft fan is disposed between the heat exchanger and the outlet of the first heat exchange channel; And / or, it also includes an internal air duct plate and an air duct cover, the internal air duct plate being disposed between the inverter element and the heat exchanger, and the air duct cover being disposed at the outlet of the second heat exchange channel.

10. A photovoltaic power generation system, characterized in that, The invention includes a photovoltaic module and an inverter according to any one of claims 1-9, wherein the photovoltaic module is used to convert light energy into electrical energy, and the inverter is used to convert the current type of the photovoltaic module.

Images