Power converter

Abstract

The utility model provides a power converter. The power converter is used for converting direct current from a photovoltaic module or an energy storage battery into alternating current. The power converter comprises a shell, a circuit board and a power device, the shell is used for accommodating the circuit board and the power device, the circuit board is used for fixing the power device, one side plate of the shell comprises a mounting hole, and the mounting hole penetrates through one side plate. The power converter further comprises a fan and a fan support, the fan support is used for containing the fan, the fan support is used for being inserted into the shell through the mounting hole, the fan and the power device are distributed on the same side of the circuit board, and the fan is used for cooling the power device and electrically connected with the circuit board. Therefore, the fan bracket containing the fan is directly mounted in the shell through the mounting hole, or the fan bracket containing the fan is directly pulled out of the shell through the mounting hole, so that the fan is mounted and dismounted, the mounting and maintenance processes of the fan are relatively simple, and the production cost and the maintenance cost of the power converter are further reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of power electronics, in particular to a power converter. BACKGROUND

[0002] In a power supply system, a power converter is used to convert direct current from a photovoltaic module or an energy storage battery into alternating current to be delivered to a power grid or a load. Generally, a fan is arranged in the power converter to dissipate heat for power devices in the power converter.

[0003] However, in the prior art, the installation and maintenance process of the fan is relatively cumbersome. Even for the power converter with the inverted circuit board, the power devices and the fan are arranged on the side of the top plate of the circuit board away from the shell of the power converter, and the circuit board will shield the fan, so that the maintenance process of the fan will also involve the removal of the circuit board, thereby making the maintenance process of the fan more cumbersome. Further, the production cost and maintenance cost of the power converter are relatively high. CONTENT OF THE INVENTION

[0004] The present application provides a power converter, and the installation and maintenance process of the fan in the power converter is relatively simple, thereby reducing the production cost and maintenance cost of the power converter.

[0005] In a first aspect, the present application provides a power converter, and the power converter is used to convert direct current from a photovoltaic module or an energy storage battery into alternating current. The power converter comprises a shell, a circuit board and power devices, the shell is used to accommodate the circuit board and the power devices, the circuit board is used to fix the power devices, one side plate of the shell comprises a mounting hole, and the mounting hole penetrates through the one side plate. The power converter further comprises a fan and a fan bracket, the fan bracket is used to accommodate the fan, the fan bracket is used to be inserted into the shell through the mounting hole, the fan and the power devices are distributed on the same side of the circuit board, and the fan is used to dissipate heat for the power devices and to electrically connect the circuit board.

[0006] The power converter provided by the present application embodiment is provided with a mounting hole on one side plate of the shell of the power converter, and the fan is accommodated in the fan bracket. In this way, the fan bracket accommodating the fan is directly installed into the shell of the power converter through the mounting hole, or the fan bracket accommodating the fan is directly pulled out of the shell of the power converter through the mounting hole, so that the installation and removal of the fan are realized, thereby the installation and maintenance process of the fan is relatively simple, and further the production cost and maintenance cost of the power converter are reduced.

[0007] In one implementation, the fan holder includes a fan accommodating groove for accommodating the fan and a plurality of protrusions for abutting against the fan. The plurality of protrusions are distributed around the slot of the fan accommodating groove and extend from the slot of the fan accommodating groove into the groove of the fan accommodating groove. One end of the protrusion is fixed to the groove wall at the slot of the fan accommodating groove, and the other end of the protrusion is spaced apart from the groove wall of the fan accommodating groove.

[0008] During the process of pushing the fan into the fan accommodating groove from one side of the slot of the fan accommodating groove, the fan will press the other end of the protrusion, so that the other end of the protrusion moves towards the groove wall of the fan accommodating groove to avoid the fan. When the fan moves to a position away from the other end of the protrusion, the other end of the protrusion will rebound to abut against the fan to fix the fan. Thus, the assembly operation of the fan and the fan holder is simple, and the production cost and maintenance cost of the power converter are reduced.

[0009] In one implementation, the size of the fan accommodating groove along the first direction is equal to the size of the fan, and the size of the fan accommodating groove along the second direction is equal to the size of the fan. The first direction, the second direction, and the orientation of the slot of the fan accommodating groove are perpendicular to each other. Thus, the fan in the fan accommodating groove can be prevented from shaking, and the reliability of the fan holder in fixing the fan can be increased.

[0010] In one implementation, the power converter further includes a bottom plate for fixing the fan holder and for covering the mounting hole. Thus, the installation and disassembly of the fan holder can be realized by pushing and pulling the bottom plate, and the installation and maintenance process of the fan is further simplified.

[0011] In one implementation, the bottom plate includes a plurality of connecting holes, each of which is used to pass through a fixing member, and each of the fixing members is used to fix the connection between the bottom plate and a side plate of the shell. Thus, the fan holder can be prevented from shaking in the shell to avoid affecting the electrical connection between the fan and the circuit board.

[0012] In one implementation, the end surface of the bottom plate towards the fan holder includes an annular groove for surrounding the fan holder and for embedding an annular sealing ring. Alternatively, the outer wall of a side plate of the shell includes an annular groove for surrounding the mounting hole and for embedding an annular sealing ring. Thus, dust, foreign matter, or liquid can be prevented from entering the inner cavity of the power converter to affect the performance of the power converter.

[0013] In one implementation, the power converter further comprises a connector, the connector comprising a plug and a socket, the plug comprising a plug housing and plug terminals, the plug housing being configured to secure and enclose the plug terminals, the socket comprising a socket housing and socket terminals, the socket housing being configured to secure and enclose the socket terminals, the socket housing being further configured to accommodate the plug housing, wherein one end of the plug terminals is configured to electrically connect to the fan terminals, the other end of the plug terminals is configured to abut one end of the socket terminals, the other end of the socket terminals is configured to electrically connect to the circuit board.

[0014] The electrical connection between the fan and the circuit board can be achieved by the mating of the plug and the socket of the connector. Thus, the installation and removal of the fan does not require the complicated cable disassembly operation, and the installation and maintenance process of the fan is further simplified.

[0015] In one implementation, the fan holder comprises a plug mounting slot configured to accommodate and secure the plug, wherein the plug housing is exposed to the fan holder in a direction of the plug towards the socket, the direction of the plug towards the socket being parallel to the through direction of the mounting hole.

[0016] During the process of loading the fan holder containing the fan into the housing of the power converter through the mounting hole, the installation of the fan in the power converter can be completed, and the blind insertion of the plug on the fan into the socket on the circuit board can also be achieved. During the process of pulling the fan holder containing the fan out of the housing of the power converter through the mounting hole, the removal of the fan in the power converter can be completed, and the blind removal of the plug on the fan from the socket on the circuit board can also be achieved. Thus, the installation and maintenance process of the fan is further simplified.

[0017] In one implementation, the socket housing comprises an accommodation slot configured to accommodate the socket terminals, and a guide slot configured to communicate with the accommodation slot, the guide slot having a slot opening facing the plug, wherein the projection of the junction of the accommodation slot and the guide slot of the socket housing in the direction of the slot opening of the guide slot is located within the projection of the slot opening of the guide slot. In other words, the guide slot is trumpet-shaped.

[0018] During the process of loading the fan holder containing the fan into the housing of the power converter through the mounting hole, the plug is first moved to the guide slot of the socket housing, and then moved to the accommodation slot of the socket housing, so that the plug can be prevented from being directly inserted into the accommodation slot of the socket housing to tilt the socket terminals and affect the accuracy of the blind insertion, and the installation and maintenance process of the fan is further simplified.

[0019] In one implementation, the arrangement direction of the circuit board and the fan holder is perpendicular to the through direction of the mounting hole. Thus, the electrical connection between the fan and the circuit board is facilitated.

[0020] In one implementation, the air outlet of the fan faces the power device. Thus, the heat dissipation effect of the fan on the power device in the power converter is improved. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 A schematic diagram of a power supply system provided for embodiments of the present application.

[0022] Figure 2 A schematic diagram of a housing of a power converter provided for embodiments of the present application.

[0023] Figure 3 An exploded schematic diagram of a power converter provided for embodiments of the present application.

[0024] Figure 4 Another schematic diagram of a power converter provided for embodiments of the present application.

[0025] Figure 5 A schematic diagram of a fan bracket provided for embodiments of the present application.

[0026] Figure 6 A schematic diagram of a fan bracket provided for embodiments of the present application. Figure 5 An enlarged schematic diagram of portion A of the fan bracket.

[0027] Figure 7 A schematic diagram of an assembly between the fan bracket and a fan provided for embodiments of the present application.

[0028] Figure 8 A schematic diagram of a fan provided for embodiments of the present application.

[0029] Figure 9 Another schematic diagram of a fan bracket provided for embodiments of the present application.

[0030] Figure 10 A schematic diagram of a bottom plate provided for embodiments of the present application.

[0031] Figure 11 A schematic diagram of an assembly between the bottom plate and the fan bracket provided for embodiments of the present application.

[0032] Figure 12 A schematic diagram of an assembly between the bottom plate and the housing provided for embodiments of the present application.

[0033] Figure 13 A schematic diagram of a plug of a connector provided for embodiments of the present application.

[0034] Figure 14 A schematic diagram of a fan bracket provided for embodiments of the present application. Figure 5 An enlarged schematic diagram of portion B of the fan bracket.

[0035] Figure 15 A schematic diagram of an assembly between the fan bracket and the plug of the connector provided for embodiments of the present application.

[0036] Figure 16A schematic view of a connector socket provided by an embodiment of the present application.

[0037] Figure 17 and Figure 18 Another schematic view of a power converter provided by an embodiment of the present application. DETAILED DESCRIPTION

[0038] The technical solutions in the present application will be described below with reference to the drawings.

[0039] The "equal / equal to" in the present application is not strictly equal / equal to, but within the error allowable range. The "parallel" is not strictly parallel, but within the error allowable range. The "perpendicular" is not strictly perpendicular, but within the error allowable range.

[0040] In the embodiments of the present application, the same reference signs represent the same components or the same parts. In the embodiments of the present application, for a plurality of identical parts, only one of the parts may be labeled with a reference sign in the drawings. The reference signs are also applicable to other identical parts or components. In addition, the sizes and dimensions of the parts shown in the drawings are only exemplary.

[0041] Figure 1 A schematic view of a power supply system provided by an embodiment of the present application. As shown in Figure 1 The power supply system 100 includes one or more photovoltaic assemblies 110, a photovoltaic inverter 120, a power grid 130, a load 140, an energy storage converter 150, and an energy storage battery 160.

[0042] The photovoltaic inverter 120 is connected to the photovoltaic assembly 110, and is configured to convert direct current delivered by the photovoltaic assembly 110 into alternating current, and deliver the alternating current to the power grid 130 or the load 140.

[0043] In one embodiment, the power supply system 100 further includes a box-type substation configured to step up the alternating current converted by the photovoltaic inverter 120, and deliver the stepped-up alternating current to the power grid 130 via a step-up station.

[0044] The energy storage converter 150 is connected to the energy storage battery 160, and is configured to convert direct current delivered by the energy storage battery 160 into alternating current, and deliver the alternating current to the power grid 130 or the load 140.

[0045] In one embodiment, the power supply system 100 further includes another box-type substation configured to step up the alternating current converted by the photovoltaic inverter 120, and deliver the stepped-up alternating current to the power grid 130 via a step-up station.

[0046] The energy storage converter 150 is also configured to receive AC power from the grid 130 or the load 140, convert the AC power into DC power, and then deliver the DC power to the energy storage battery 160 for storage.

[0047] In one embodiment, the other box-type substation is also configured to step down AC power from the grid 130, and deliver the stepped-down AC power to the energy storage converter 150.

[0048] In an example, the energy storage battery 160 can be a storage battery, or can be an energy storage container, or can be another form of device for energy storage.

[0049] Figure 1 The PV inverter 120 or the energy storage converter 150 shown in

[0050] Generally, a fan in a power converter is configured to dissipate heat from power devices in the power converter. In the prior art, the fan needs to be fixed in a housing of the power converter by multiple screws, and thus, the installation and maintenance process of the fan is relatively complicated. In addition, for a power converter with a reversed circuit board, since the reversed circuit board blocks the fan in the cavity of the power converter, the maintenance process of the fan not only involves the disassembly of multiple screws, but also involves the disassembly of the circuit board, and thus, the maintenance process of the fan is more complicated. Further, the production cost and maintenance cost of the power converter are relatively high.

[0051] Therefore, the embodiment of the present application provides a power converter 200. In one embodiment, the power converter 200 provided by the embodiment of the present application is a Figure 1 PV inverter 120 shown in Figure 1 In one embodiment, the power converter 200 provided by the embodiment of the present application is an energy storage converter 150 shown in

[0052] The specific structure of the power converter provided by the embodiment of the present application will be described in detail below. Figures 2 to 18 The specific structure of the power converter provided by the embodiment of the present application will be described in detail below.

[0053] Figure 2 A schematic diagram of the housing of the power converter provided by the embodiment of the present application is shown in Figure 2 As shown in Figure 2As shown, the shell 210 comprises a box 211 having an opening 2111 and a cover plate 212 for enclosing the opening 2111 of the box 211 to form a containing cavity of the shell 210. As shown, Figure 2 As shown, the opening of the box 211 is oriented in the z direction. That is, the cover plate 212 encloses the opening 2111 of the box 211 in the opposite direction of the z direction.

[0054] Figure 3 A disassembled schematic diagram of the power converter provided in the embodiments of the present application. As shown, Figure 3 As shown, the power converter 200 further comprises a circuit board 220 and one or more power devices 230, which are accommodated in the containing cavity of the shell 210. In an embodiment, as shown, Figure 3 As shown, the power devices 230 and the circuit board 220 are arranged in the containing cavity of the shell 210 in the z direction. That is, the power devices 230, the circuit board 220 and the cover plate 212 of the shell 210 are arranged in sequence in the z direction.

[0055] The circuit board 220 is used to fix the one or more power devices 230. In an embodiment, the plurality of power devices 230 are fixed on the same side of the circuit board 220. As shown, Figure 3 As shown, the plurality of power devices 230 are fixed on the side of the circuit board 220 away from the cover plate 212.

[0056] The circuit board 220 in the embodiments of the present application can also be referred to as a printed circuit board assembly (PCBA).

[0057] The power device 230 in the embodiments of the present application refers to a device capable of generating heat during operation, that is, the power device 230 is a device with heat consumption.

[0058] Exemplarily, the power device 230 includes a switch tube, an inductor, a capacitor, a relay, etc. of a direct current / direct current (DC / DC) circuit or a direct current / alternating current (DC / AC) circuit. The DC / DC circuit and the DC / AC circuit are fixed to the circuit board 220. The DC / DC circuit is configured to perform voltage conversion on direct current from the photovoltaic module 110 or the energy storage battery 160. The DC / AC circuit is configured to convert the direct current that has been subjected to voltage conversion by the DC / DC circuit into alternating current, and transmit the alternating current to a power grid or a load through an alternating current output end of the power converter 200. The relay is fixed to the circuit board 220, and is electrically connected between the DC / AC circuit and the alternating current output end of the power converter 200, and is configured to realize grid-connected and off-grid switching of the power converter 200.

[0059] Figure 4 Another schematic diagram of the power converter is provided for the embodiments of the present application. As shown in Figure 4 The power converter 200 further includes a fan 240 and a fan bracket 250. The fan bracket 250 is configured to accommodate the fan 240. As shown in Figure 2 The side plate 2112 of the housing 210, i.e. the side plate 2112 of the cabinet 211, includes a mounting hole T. The mounting hole T penetrates the side plate 2112. The fan bracket 250 is configured to be inserted into the housing 210 through the mounting hole T. That is, the fan bracket 250 is configured to insert the fan 240 into the housing 210 through the mounting hole T. As shown in Figure 2 Or Figure 3 The direction in which the mounting hole T penetrates the side plate 2112, i.e. the penetration direction of the mounting hole T, is the x direction.

[0060] In this way, the fan bracket 250 that accommodates the fan 240 is directly inserted into the housing 210 of the power converter 200 through the mounting hole T, or the fan bracket 250 that accommodates the fan 240 is directly pulled out of the housing 210 of the power converter 200 through the mounting hole T, thereby realizing installation and dismounting of the fan 240. Therefore, the installation and maintenance process of the fan 240 is relatively simple, and the production cost and maintenance cost of the power converter 200 are reduced.

[0061] As shown in Figure 4 The fan 240 and the power device 230 are distributed on the same side of the circuit board 220. The fan 240 is configured to dissipate heat for the power device 230. In an embodiment, an air outlet of the fan 240 faces the power device 230. Therefore, the heat dissipation effect of the fan 240 on the power device 230 in the power converter 200 is improved.

[0062] In one embodiment, the arrangement direction of the circuit board 220 and the fan bracket 250 is perpendicular to the through direction of the mounting hole T. For example, as Figure 4 As shown, the circuit board 220 and the fan bracket 250 are arranged along the z-direction, and the mounting hole T passes through in the x-direction, with the z-direction perpendicular to the x-direction. This facilitates the electrical connection between the fan 240 and the circuit board 220.

[0063] Figure 5 This is a schematic diagram of a fan bracket provided in an embodiment of this application. Figure 5 As shown, the fan bracket 250 includes a fan receiving slot 251 for accommodating the fan 240. Figure 5 As shown, the opening 2511 of the fan receiving slot 251 faces the y-direction. Therefore, by pushing the fan 240 into the fan receiving slot 251 in the opposite direction of the y-direction, the fan 240 and the fan bracket 250 can be assembled.

[0064] In one embodiment, such as Figure 5 As shown, the fan bracket 250 also includes multiple protrusions 252, which are used to abut against the fan 240, thereby enabling the fan 240 to be fixed.

[0065] Figure 6 for Figure 5 An enlarged schematic diagram of part A of the central fan bracket. (See diagram below.) Figure 5 As shown, multiple protrusions 252 are distributed around the opening 2511 of the fan receiving slot 251, and the protrusions 252 extend from the opening 2511 of the fan receiving slot 251 into the slot of the fan receiving slot 251. Figure 6 As shown, one end 2521 of the protrusion 252 is fixed to the groove wall at the opening 2511 of the fan receiving groove 251, and the other end 2522 of the protrusion 252 is spaced apart from the groove wall of the fan receiving groove 251. In other words, the other end 2522 of the protrusion 252 is tilted away from the groove wall of the fan receiving groove 251 connected to the one end 2521 of the protrusion 252. Alternatively, the angle between the one end 2521 of the protrusion 252 and the groove wall of the fan receiving groove 251 connected to the one end 2521 of the protrusion 252 is 0 degrees, and the angle α between the other end 2522 of the protrusion 252 and the groove wall of the fan receiving groove 251 connected to the one end 2521 of the protrusion 252 is an acute angle.

[0066] Figure 7 This is a schematic diagram illustrating an assembly between a fan bracket and a fan according to an embodiment of this application. During the process of pushing the fan 240 into the fan receiving groove 251 from one side of the groove 2511, the fan 240 will press against the other end 2522 of the protrusion 252, causing the other end 2522 of the protrusion 252 to move towards the groove wall of the fan receiving groove 251 to avoid the fan 240. For example...Figure 7 As shown, when the fan 240 moves to the position away from the other end 2522 of the protrusion 252, the other end 2522 of the protrusion 252 rebounds to abut against the fan 240, so as to fix the fan 240. Thus, the assembling operation of the fan 240 and the fan support 250 is simple, and the production cost and the maintenance cost of the power converter 200 are reduced.

[0067] Figure 8 A schematic diagram of the fan provided by the embodiment of the present application is shown. In an embodiment, as shown in Figure 8 The fan frame 241 of the fan 240 is a cuboid structure. As shown in Figure 5 The fan accommodating groove 251 of the fan support 250 is also a cuboid structure. As shown in Figure 5 The fan accommodating groove 251 of the fan support 250 includes a groove opening 2511, a groove bottom 2512, and four groove walls 2513-2516. The groove opening 2511 and the groove bottom 2512 are arranged opposite to each other along the y direction. Two of the four groove walls 2513-2516, i.e., the groove walls 2513 and 2514, are arranged opposite to each other along the x direction. The other two of the four groove walls 2513-2516, i.e., the groove walls 2515 and 2516, are arranged opposite to each other along the z direction. At least one protrusion 252 is arranged on at least two of the four groove walls 2513-2516 of the fan accommodating groove 251 of the fan support 250.

[0068] In an embodiment, the fan frame 241 of the fan 240 is a columnar structure, and the fan accommodating groove 251 of the fan support 250 is also a columnar structure. In this way, one of the remaining groove walls of the fan accommodating groove 251 of the fan support 250, except the groove opening and the groove bottom, is provided with a plurality of protrusions 252.

[0069] Figure 9 Another schematic diagram of the fan support provided by the embodiment of the present application is shown. In an embodiment, the fan support 250 further includes a ventilation opening 25121, and the direction of the ventilation opening 25121 is parallel to the direction of the air outlet of the fan 240. As shown in Figure 5 The direction of the ventilation opening 25121 is parallel to the y direction, and the direction of the air outlet of the fan 240 is also parallel to the y direction. As shown in Figure 9 The direction of the ventilation opening 25121 is parallel to the x direction, and the direction of the air outlet of the fan 240 is also parallel to the x direction.

[0070] In an embodiment, the direction of the ventilation opening 25121 is parallel to the direction of the groove opening 2511 of the fan accommodating groove 251. As shown in Figure 5 The ventilation opening 25121 penetrates the groove bottom 2512 of the fan support 250. The direction of the ventilation opening 25121 is parallel to the y direction, and the direction of the groove opening 2511 of the fan accommodating groove 251 is also parallel to the y direction.

[0071] In an embodiment, the orientation of the vent 25121 is perpendicular to the orientation of the slot opening 2511 of the fan accommodating slot 251. As shown in Figure 9 the vent 25121 penetrates the slot wall 2514 of the fan support 250, the orientation of the vent 25121 is parallel to the x direction, and the orientation of the slot opening 2511 of the fan accommodating slot 251 is parallel to the y direction.

[0072] In an embodiment, the size of the fan accommodating slot 251 along the first direction is equal to the size of the fan 240, and the size of the fan accommodating slot 251 along the second direction is equal to the size of the fan 240. The first direction, the second direction, and the orientation of the slot opening 2511 of the fan accommodating slot 251 are perpendicular to each other. Among them, one of the first direction and the second direction is the x direction, and the other is the z direction. In other words, along the orientation of the slot opening 2511 of the fan accommodating slot 251, the projection of the fan accommodating slot 251 and the projection of the fan 240 completely overlap. Thus, it can prevent the fan 240 in the fan accommodating slot 251 from shaking, thereby increasing the reliability of the fan support 250 fixing the fan 240.

[0073] In an embodiment, as shown in Figure 8 the fan frame 241 of the fan 240 includes a plurality of fixing holes 242. As shown in Figure 5 the slot bottom 2512 of the fan support 250 also includes a plurality of fixing holes 253. Each fixing hole 242 of the fan 240 cooperates with a fixing hole 253 of the fan support 250, and a fixing member penetrates the fixing hole 242 of the fan 240 and the fixing hole 253 of the fan support 250, thereby fixing the fan 240 and the fan support 250.

[0074] Figure 10 A schematic view of the bottom plate provided by an embodiment of the present application. Figure 11 An assembly schematic view between the bottom plate provided by an embodiment of the present application and the fan support. Figure 12 An assembly schematic view between the bottom plate provided by an embodiment of the present application and the shell. As shown in Figure 10 the power converter 200 also includes a bottom plate 260, and the bottom plate 260 is used to fix the fan support 250. As shown in Figure 11 the end surface 261 of the bottom plate 260 towards the fan support 250 is fixedly connected with the fan support 250. As shown in Figure 12 the bottom plate 260 is distributed outside the accommodating cavity of the shell 210, and the bottom plate 260 is also used to cover the mounting hole T. Thus, the installation and disassembly of the fan support 250 can be realized by pushing and pulling the bottom plate 260, further simplifying the installation and maintenance process of the fan 240.

[0075] In an embodiment, as shown in Figure 10 the bottom plate 260 includes a plurality of connecting holes 262, and the connecting holes 262 are arranged in a matrix.Figure 2 As shown, the side plate 2112 includes a plurality of connecting holes 262, and the plurality of connecting holes 262 of the bottom plate 260 are matched with one connecting hole 262 of the side plate 2112, and the connecting member passes through the connecting hole 262 of the bottom plate 260 and the connecting hole 262 of the side plate 2112, so as to fix the bottom plate 260 and the side plate 2112 of the shell 210, and then realize the fixation of the fan bracket 250 and the shell 210, which can prevent the fan bracket 250 from shaking in the shell 210, so as to avoid affecting the electrical connection of the fan 240 and the circuit board 220.

[0076] In an embodiment, as shown in Figure 10 The end surface 262 of the bottom plate 260 towards the fan bracket 250 includes an annular groove G1, and the annular groove G1 of the bottom plate 260 is used for surrounding the fan bracket 250 and embedding the annular sealing ring 280. Thus, the dust, foreign matter or liquid can be prevented from entering the inner cavity of the power converter 200 to affect the performance of the power converter 200.

[0077] In an embodiment, as shown in Figure 2 The outer wall of the side plate 2112 of the shell 210 includes an annular groove G2, and the annular groove G2 is used for surrounding the mounting hole T and embedding the annular sealing ring. Thus, the dust, foreign matter or liquid can be prevented from entering the inner cavity of the power converter 200 to affect the performance of the power converter 200.

[0078] The fan 240 is also used for electrically connecting the circuit board 220. In an embodiment, the power converter 200 further includes a connector 270, and the connector 270 includes a plug 271 and a socket 272, and the plug 271 is used for being inserted into the socket 272. The connection and disconnection of the fan 240 and the circuit board 220 are realized through the plugging and unplugging between the plug 271 and the socket 272. In this way, the installation and dismounting process of the fan 240 does not need the complicated cable dismounting operation, so as to simplify the installation and maintenance process of the fan 240.

[0079] Figure 13 A schematic view of the plug of the connector provided in the embodiment of the present application. As shown in Figure 13 The plug 271 includes a plug shell 2711 and plug terminals (not shown in the figure), and the plug shell 2711 is used for fixing and wrapping the plug terminals. Figure 13

[0080] Figure 14 An enlarged schematic view of the B part of the fan bracket in Figure 5 As shown in Figure 14 The fan bracket 250 includes a plug mounting groove 254, and the plug mounting groove 254 is used for accommodating and fixing the plug 271.

[0081] Figure 15 ​An assembly view between the fan bracket and the plug of the connector is provided for the embodiment of the present application. As shown in Figure 15 The plug housing 2711 is exposed from the fan bracket 250 in the direction of the plug 271 towards the socket 272, i.e. in the through direction y parallel to the mounting hole T.

[0082] In the process of inserting the fan bracket 250 containing the fan 240 into the housing 210 of the power converter 200 through the mounting hole T, not only the installation of the fan 240 in the power converter 200 can be completed, but also the blind insertion of the plug 271 on the fan 240 into the socket 272 on the circuit board 220 can be achieved. In the process of pulling out the fan bracket 250 containing the fan 240 from the housing 210 of the power converter 200 through the mounting hole T, not only the removal of the fan 240 in the power converter 200 can be completed, but also the blind removal of the plug 271 on the fan into the socket 272 on the circuit board 220 can be achieved. Thus, the installation and maintenance process of the fan 240 is further simplified.

[0083] In an embodiment, as shown in Figure 13 The plug housing 2711 further includes two protrusions 2712, one of the two protrusions 2712 protrudes from the outer wall of the plug housing 2711 in the y direction, and the other of the two protrusions 2712 protrudes from the outer wall of the plug housing 2711 in the opposite direction of the y direction. As shown in Figure 14 The plug mounting groove 254 further includes two recesses 2541, one of the two recesses 2541 is recessed from the groove wall of the plug mounting groove 254 in the y direction, and the other of the two recesses 2541 is recessed from the groove wall of the plug mounting groove 254 in the opposite direction of the y direction. Each of the two recesses 2541 is used to embed one of the two protrusions 2712. In this way, in the process of inserting the fan bracket 250 containing the fan 240 into the housing 210 of the power converter 200 through the mounting hole T, the movement of the plug housing 2711 in the through direction y of the mounting hole T can be prevented by the cooperation between the recess 2541 and the protrusion 2712, so as to avoid the invalid insertion between the plug 271 and the socket 272. In the process of pulling out the fan bracket 250 containing the fan 240 from the housing 210 of the power converter 200 through the mounting hole T, the movement of the plug housing 2711 in the through direction y of the mounting hole T can be prevented by the cooperation between the recess 2541 and the protrusion 2712, so as to avoid the invalid removal between the plug 271 and the socket 272.

[0084] Figure 16 A schematic view of the socket of the connector is provided for the embodiment of the present application. As shown in Figure 16As shown, the socket 272 comprises a socket housing 2721 and socket terminals 2722, the socket housing 2721 is used to fix and wrap the socket terminals 2722, and the socket housing 2721 is also used to accommodate the plug housing 2711. One end of the plug terminal 2712 is used to electrically connect the wiring end of the fan 240, and the other end of the plug terminal 2712 is used to abut one end of the socket terminal 2722, and the other end of the socket terminal 2722 is used to electrically connect the circuit board 220.

[0085] Through the butt joint of the plug 271 and the socket 272 of the connector 270, the electrical connection of the fan 240 and the circuit board 220 can be realized. Therefore, the installation and disassembly process of the fan 240 does not need complicated cable disassembly operation, thereby further simplifying the installation and maintenance process of the fan 240.

[0086] As shown in the figure, Figure 16 the socket housing 2721 comprises an accommodation groove 2723 and a guide groove 2724, the accommodation groove 2723 is used to accommodate the socket terminal 2722, and the guide groove 2724 is used to communicate with the accommodation groove 2723, and the slot of the guide groove 2724 faces the plug 271. Among them. Along the direction of the slot of the guide groove 2724, the projection of the connection between the accommodation groove 2723 and the guide groove 2724 of the socket housing 2721 is located in the projection of the slot of the guide groove 2724. In other words, the guide groove 2724 is trumpet-shaped.

[0087] During the process of loading the fan bracket 250 containing the fan 240 into the housing 210 of the power converter 200 through the mounting hole T, the plug 271 is first moved to the guide groove 2724 of the socket 272 housing 210, and then moved to the accommodation groove 2723 of the socket 272 housing 210, so that it can be prevented that the plug 271 is directly inserted into the accommodation groove 2723 of the socket 272 housing 210 to affect the accuracy of blind insertion by tilting the socket terminal 272, thereby further simplifying the installation and maintenance process of the fan.

[0088] In the embodiment of the present application, the direction of the slot of the guide groove 2724 is parallel to the central axis of the guide groove 2724.

[0089] In one embodiment, as shown in the figure, Figure 13 the end surface 2713 of the plug housing 2711 facing the socket 272 further comprises a plurality of through holes 2714, each through hole 2714 is used to accommodate one plug terminal 2712. Therefore, during the process of inserting the plug 271 into the socket 272, each socket terminal 2722 of the socket 272 passes through one through hole 2714 of the plug housing 2711 to electrically connect with the plug terminal 2712 of the plug 271.

[0090] Figure 17 and Figure 18 are another schematic diagram of the power converter provided by the embodiment of the present application, respectively.

[0091] First, the fan 240 is assembled into the fan holder 250 in the opposite direction of the x direction, the plug 272 is assembled into the plug mounting slot 254 of the fan holder 250, and one end of the plug 272 is electrically connected to the terminal of the fan 240. Then, as shown in Figure 17 the fan holder 250 is pushed into the housing 210 along the mounting hole T of the housing 210 in the opposite direction of the x direction. During the process of pushing the fan holder 250 into the housing 210 along the mounting hole T of the housing 210, the plug 271 on the fan 240 can be mated with the socket 272 on the circuit board 220. As shown in Figure 18 when the bottom plate 260 of the power converter 200 contacts the side plate 2112 of the housing 210, not only the installation of the fan 240 can be achieved, but also the plug 271 on the fan 240 can be achieved blind insertion with the socket 272 on the circuit board 220. Thus, the installation of the fan 240 is relatively simple, thereby reducing the production cost and maintenance cost of the power converter 200.

[0092] When the fan 240 needs to be maintained, the bottom plate 260 of the power converter 200 is pulled in the x direction, the fan holder 250 drives the fan 240 to separate to the outside of the housing 210, and the plug 271 on the fan 240 also separates from the socket 272 on the circuit board 220, without the need to disassemble other components of the power converter 200, the fan 240 can be disassembled. Thus, the maintenance process of the fan 240 is relatively simple, thereby reducing the production cost and maintenance cost of the power converter 200.

[0093] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any skilled person in the art can easily think of changes or replacements within the technical range disclosed in the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A power converter, characterized by, The power converter is used for converting direct current from a photovoltaic module or an energy storage battery into alternating current, and comprises: a housing, a circuit board and at least one power device, the housing is used for accommodating the circuit board and the power device, the circuit board is used for fixing the power device, one side plate of the housing comprises a mounting hole, the mounting hole penetrates through the one side plate; a fan and a fan support, the fan support is used for accommodating the fan, the fan support is used for being inserted into the housing through the mounting hole, the fan and the power device are distributed on the same side of the circuit board, and the fan is used for dissipating heat of the power device and for electrically connecting the circuit board.

2. The power converter of claim 1, wherein, The fan support comprises a fan accommodating groove and a plurality of protrusions, the fan accommodating groove is used for accommodating the fan, and the protrusions are used for abutting against the fan, wherein: the plurality of protrusions are distributed around the slot of the fan accommodating groove, the protrusions extend from the slot of the fan accommodating groove to the groove of the fan accommodating groove, one end of the protrusions is used for being fixed to the groove wall at the slot of the fan accommodating groove, and the other end of the protrusions is spaced from the groove wall of the fan accommodating groove.

3. The power converter of claim 2, wherein, The size of the fan accommodating groove along a first direction is equal to the size of the fan, the size of the fan accommodating groove along a second direction is equal to the size of the fan, the first direction, the second direction and the orientation of the slot of the fan accommodating groove are perpendicular to each other.

4. The power converter of claim 1, wherein, The power converter further comprises a bottom plate, the bottom plate is used for fixing the fan support and for covering the mounting hole.

5. The power converter of claim 4, wherein, The bottom plate comprises a plurality of connecting holes, each of the connecting holes is used for penetrating through a fixing member, and each of the fixing members is used for fixing the bottom plate to the one side plate of the housing.

6. A power converter as claimed in claim 4 or 5, characterised in that, An end surface of the bottom plate towards the fan support comprises an annular groove, the annular groove is used for surrounding the fan support and for embedding an annular sealing ring.

7. A power converter as claimed in claim 4 or 5, characterised in that, An outer wall of the one side plate of the housing comprises an annular groove, the annular groove is used for surrounding the mounting hole and for embedding an annular sealing ring.

8. The power converter of claim 1, wherein, The power converter further comprises a connector, the connector comprises: a plug, the plug comprises a plug housing and plug terminals, the plug housing is used for fixing and wrapping the plug terminals; a socket, the socket comprises a cylindrical socket housing and socket terminals, the socket housing is used for fixing and wrapping the socket terminals, and the socket housing is further used for accommodating the plug housing; wherein one end of the plug terminals is used for electrically connecting the wiring terminals of the fan, the other end of the plug terminals is used for abutting against one end of the socket terminals, and the other end of the socket terminals is used for electrically connecting the circuit board.

9. The power converter of claim 8, wherein, The fan support comprises a plug mounting groove, the plug mounting groove is used for accommodating and fixing the plug, wherein: the plug housing is exposed to the fan support along a direction of the plug towards the socket, and the direction of the plug towards the socket is parallel to the penetrating direction of the mounting hole.

10. A power converter as claimed in claim 8 or 9, characterised in that, The socket housing comprises an accommodating groove and a guide groove, the accommodating groove is used for accommodating the socket terminals, and the guide groove is used for communicating with the accommodating groove, a slot of the guide groove is towards the plug, and wherein: The projection of the accommodating groove of the socket housing at the connection with the guide groove is located within the projection of the slot of the guide groove.

11. The power converter of any one of claims 1 to 5, 8, 9, wherein, The arrangement direction of the circuit board and the fan support is perpendicular to the penetrating direction of the mounting hole.

12. The power converter of any one of claims 1 to 5, 8, 9, wherein, The air outlet of the fan faces the power device.

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