Frequency converter

Abstract

The embodiment of the utility model relates to the technical field of frequency converters, and particularly discloses a frequency converter, which comprises a shell provided with an accommodating cavity and an opening communicated with the accommodating cavity; the installation support is detachably connected to the shell, and the installation support is arranged in the containing cavity; the capacitor assembly is detachably mounted on the mounting bracket, and the capacitor assembly is mounted on the mounting bracket; and the main circuit board is arranged in the accommodating cavity, the main circuit board is electrically connected with the capacitor assembly, and the main circuit board and the shell are relatively fixed. Through the above mode, according to the embodiment of the utility model, the adaptive objects of the housing of the frequency converter can be more diversified so as to meet different market requirements.

Description

Technical Field

[0001] The utility model relates to the technical field of frequency converters, in particular to a frequency converter. Background Art

[0002] The frequency converter is an electric power control device that applies frequency conversion technology and microelectronics technology to control the AC motor by changing the frequency of the motor's working power supply.

[0003] In the related art, the inverter generally includes a chassis in which a capacitor assembly and a main circuit board are arranged. The capacitor assemblies of different inverters may be different, so it is necessary to manufacture a housing adapted to different capacitor assemblies to fix the different capacitor assemblies.

[0004] However, manufacturing different housings for each specification and model of inverter will affect process efficiency and manufacturing costs. Utility Model Content

[0005] During the process of implementing the present invention, the inventors discovered that the mounting bracket for mounting the capacitor assembly is integrally formed with the housing, and therefore different housings need to be manufactured to accommodate different capacitor assemblies. However, if the inverter housing is enlarged and mounting positions are increased to accommodate different capacitor assemblies, the size of the inverter will likely become larger.

[0006] In view of this, an embodiment of the present invention provides an inverter, which is conducive to allowing the inverter housing to adapt to different capacitor components, thereby improving process efficiency and reducing costs.

[0007] According to one aspect of the utility model, an inverter is provided, including: a shell, provided with a accommodating cavity and an opening connected to the accommodating cavity; a mounting bracket, the mounting bracket being detachably connected to the shell, and the mounting bracket being arranged in the accommodating cavity; a capacitor assembly, detachably mounted on the mounting bracket; a main circuit board, arranged in the accommodating cavity, the main circuit board being electrically connected to the capacitor assembly, and the main circuit board and the shell being relatively fixed.

[0008] In some embodiments, the mounting bracket includes a first mounting bracket, the first mounting bracket includes a first surface and a second surface arranged opposite to the first surface, a plurality of first capacitor sleeves are arranged on the first mounting bracket, the plurality of first capacitor sleeves are arranged adjacent to each other, and the first capacitor sleeves pass through the second surface from the first surface; the capacitor assembly includes a first capacitor assembly, the first capacitor assembly includes a first circuit board and a plurality of first capacitors, the number of the first capacitors corresponds to the number of the first capacitor sleeves, the first circuit board is electrically connected to the main circuit board, the first circuit board is detachably connected to the first mounting bracket and is arranged on the first surface, the first capacitor is connected to the first circuit board, and the first capacitor is passed through the first capacitor sleeve.

[0009] In some embodiments, the first capacitor assembly includes a first insulating pad, a portion of the first insulating pad is arranged between the first circuit board and the first mounting bracket, a portion of the first insulating pad is located between the first circuit board and the first capacitor, one side of the first insulating pad abuts the first circuit board, and the other side of the first insulating pad abuts one end of the first capacitor.

[0010] In some embodiments, a first connecting terminal is also provided on the first circuit board, the first connecting terminal is located on the side of the first circuit board away from the first mounting bracket, and the first connecting terminal is used to be electrically connected to the main circuit board; the first capacitor assembly also includes a first insulating plate, the first insulating plate is provided on the side of the first circuit board close to the main circuit board, the first insulating plate is located between the main circuit board and the first circuit board, and a first through hole is provided on the first insulating plate, and the first through hole is for the first connecting terminal to pass through and connect to the main circuit board.

[0011] In some embodiments, a limiting groove is provided on the side of the first mounting bracket facing away from the opening along the depth direction of the accommodating cavity; a limiting rib is provided on the inner side wall of the shell, the limiting rib is arranged opposite to the limiting groove, and the limiting rib is clamped in the limiting groove.

[0012] In some embodiments, the mounting bracket includes a second mounting bracket, the second mounting bracket includes an upper surface and a lower surface arranged opposite to the upper surface, a plurality of second capacitor sleeves are arranged on the second mounting bracket, the plurality of second capacitor sleeves are arranged adjacent to each other, and the second capacitor sleeves pass through the lower surface from the upper surface; the capacitor assembly includes a second capacitor assembly, the second capacitor assembly includes a second circuit board and a plurality of second capacitors, the number of the second capacitors corresponds to the number of the second capacitor sleeves, the second circuit board is electrically connected to the main circuit board, the second circuit board is detachably connected to the second mounting bracket and is arranged on the upper surface, the second capacitor is connected to the second circuit board, and the second capacitor is passed through the second capacitor sleeve.

[0013] In some embodiments, a connecting through-hole is further provided on the second mounting bracket, and the connecting through-hole passes through from the upper surface to the lower surface; the inverter also includes an inductor component, which is arranged in the accommodating cavity, and the inductor component includes an inductor body and a connecting wire. Along the depth direction of the accommodating cavity, the inductor body is located on the side of the second mounting bracket away from the opening; a wire guard ring is also provided on the second mounting bracket, and the wire guard ring is provided in the connecting through-hole, one end of the connecting wire is connected to the inductor body, and the other end of the connecting wire passes through the wire guard ring and is connected to the main circuit board.

[0014] In some embodiments, an isolation slot is provided on the side of the second mounting bracket facing away from the opening along the depth direction of the accommodating cavity, and the isolation slot is located on the lower surface; the second capacitor assembly also includes an inductor isolation plate, which is inserted into the isolation slot, and the inductor isolation plate is located between the inductor body and the second capacitor.

[0015] In some embodiments, a second connecting terminal is also provided on the second circuit board, and the second connecting terminal is located on the side of the second circuit board facing away from the second mounting bracket, and the second connecting terminal is used to be electrically connected to the main circuit board; the second capacitor assembly also includes a second insulating plate, and the second insulating plate is provided on the side of the second circuit board close to the main circuit board, and the second insulating plate is located between the main circuit board and the second circuit board, and a second through hole is provided on the second insulating plate, and the second through hole is for the second connecting terminal to pass through and connect to the main circuit board.

[0016] In some embodiments, the mounting bracket includes a first mounting bracket, a first capacitor sleeve is provided on the first mounting bracket, and a plurality of first limiting claws are extended from the end of the first capacitor sleeve; the capacitor assembly includes a first capacitor assembly, the first capacitor assembly includes a first circuit board and a first capacitor, the first capacitor is connected to the first circuit board and is inserted into the first capacitor sleeve, and the first capacitor is offset against the plurality of first limiting claws.

[0017] In some embodiments, the mounting bracket includes a second mounting bracket, a second capacitor sleeve is provided on the second mounting bracket, and a plurality of second limiting claws are extended from the end of the second capacitor sleeve; the capacitor assembly includes a second capacitor assembly, the second capacitor assembly includes a second circuit board and a second capacitor, the second capacitor is connected to the second circuit board and is inserted into the second capacitor sleeve, and the second capacitor is offset against the plurality of second limiting claws.

[0018] In some embodiments, the accommodating chamber includes a first chamber and a second chamber that are interconnected, and the first chamber and the second chamber are arranged in a direction perpendicular to the depth direction of the accommodating chamber; the mounting bracket is located in the first chamber, and the shell is provided with a fixed bracket, and the fixed bracket is located in the second chamber, and the main circuit board is installed on the fixed bracket, and along the depth direction of the accommodating chamber, part of the main circuit board is located on the side of the capacitor assembly facing the opening.

[0019] The beneficial effects of the embodiment of the present utility model are as follows: different from the prior art, the embodiment of the present utility model is provided with a shell, a mounting bracket, a capacitor assembly and a main circuit board. Among them, the shell is provided with a accommodating cavity and an opening connected to the accommodating cavity, the mounting bracket is detachably connected to the shell, the mounting bracket is arranged in the accommodating cavity, the capacitor assembly is detachably mounted on the mounting bracket, the main circuit board is arranged in the accommodating cavity, the main circuit board is electrically connected to the capacitor assembly, and the main circuit board is relatively fixed to the shell. In order to make different frequency converters, in the related art, it is usually necessary to make different types of chassis. During the production process, many molds are required, the production cost is high, and the process is cumbersome. However, in the frequency converter of the present application, different types of frequency converters can share a shell, and only different mounting brackets need to be made separately, which is conducive to improving process efficiency and reducing costs. In addition, since the mounting bracket and the shell are in a detachable state, when the frequency converter needs to adapt to different capacitor assemblies, the user only needs to replace it with the required mounting bracket to adapt to different types of electrical appliances to form different frequency converters. Compared with a single inverter that can only adapt to a single type of electrical appliance, the inverter in the embodiment of the present application can replace the mounting bracket according to actual needs, thereby making the inverter shell adaptable to more diverse objects, which is conducive to meeting different market needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly describes the drawings required for the specific embodiments or the description of the prior art. Similar elements or parts are generally identified by similar reference numerals throughout the drawings. Elements or parts in the drawings are not necessarily drawn to scale.

[0021] Figure 1 This is a schematic diagram of the overall structure of the frequency converter according to the embodiment of the utility model;

[0022] Figure 2 This is a schematic diagram of the overall structure of the inverter with the first mounting bracket according to an embodiment of the utility model;

[0023] Figure 3 This is a schematic diagram of the overall structure of the inverter with the second mounting bracket according to an embodiment of the utility model;

[0024] Figure 4 This is a partial structural diagram of the housing of the frequency converter according to an embodiment of the utility model;

[0025] Figure 5 This is an exploded perspective view of the first mounting bracket and the first capacitor assembly of the frequency converter according to an embodiment of the present utility model;

[0026] Figure 6 This is a schematic diagram of the first mounting bracket and the first capacitor assembly of the inverter according to an embodiment of the utility model, which is exploded from another angle;

[0027] Figure 7 This is an exploded perspective view of the second mounting bracket and the second capacitor assembly of the frequency converter according to an embodiment of the present utility model;

[0028] Figure 8 This is a schematic diagram of the second mounting bracket and the second capacitor assembly of the inverter according to an embodiment of the utility model, which is exploded from another angle;

[0029] Figure 9 This is a schematic diagram of the overall structure of the inverter with the first mounting bracket from another angle of decomposition. DETAILED DESCRIPTION

[0030] In order to facilitate the understanding of the present invention, the present invention is described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is described as "fixed to" another element, it can be directly on the other element, or there can be one or more centered elements therebetween. When an element is described as "connected to" another element, it can be directly connected to the other element, or there can be one or more centered elements therebetween. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this specification are for illustrative purposes only.

[0031] Unless otherwise defined, all technical and scientific terms used in this specification have the same meanings as those commonly understood by those skilled in the art to which this utility model belongs. The terms used in this specification and in the description of this utility model are only for the purpose of describing specific embodiments and are not intended to limit the utility model. The term "and / or" used in this specification includes any and all combinations of one or more of the relevant listed items.

[0032] In addition, the technical features involved in different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0033] In some embodiments, see Figure 1 and Figure 2 The inverter 1000 includes a housing 10, a mounting bracket 20, a capacitor assembly 30, and a main circuit board 40. The mounting bracket 20, the capacitor assembly 30, and the main circuit board 40 are all disposed within the housing 10. The mounting bracket 20 is detachably connected to the housing 10. The capacitor assembly 30 is detachably mounted on the mounting bracket 20, and the capacitor assembly 30 is electrically connected to the main circuit board 40.

[0034] In some embodiments, the inverter 1000 further includes an inductor component 50 , which is disposed in the housing 10 .

[0035] In some embodiments, the inverter 1000 also includes a heat dissipation assembly 60, which is disposed in the housing 10. The mounting bracket 20 is detachably connected to the housing 10. The capacitor assembly 30 is detachably mounted on the mounting bracket 20. The heat dissipation assembly 60 can be used to dissipate heat for the main circuit board 40, the inductor assembly 50, and the capacitor assembly 30. The capacitor assembly 30, the inductor assembly 50, and the heat dissipation assembly 60 are all interconnected with the main circuit board 40 circuit.

[0036] The housing 10 , the mounting bracket 20 , the capacitor assembly 30 , the main circuit board 40 , the inductor assembly 50 and the heat dissipation assembly 60 are described in detail below.

[0037] In some embodiments, as Figure 2-Figure 4 As shown, the housing 10 includes an upper cover 101 and a bottom housing 102. The bottom housing 102 is provided with a receiving cavity 10a and an opening 10b communicating with the receiving cavity 10a. The upper cover 101 is mounted on the bottom housing 102 and is removably connected to the upper cover 101 and the bottom housing 102. The main circuit board 40 is disposed within the receiving cavity 10a and serves to connect various components. The main circuit board 40 is interconnected with the capacitor assembly 30, the inductor assembly 50, and the heat sink assembly 60, and is relatively fixed to the housing 10. The receiving cavity 10a is used to install components such as the mounting bracket 20, the capacitor assembly 30, the main circuit board 40, and the inductor assembly 50. The user can open the opening 10b through the upper cover 101 to conveniently repair or replace the internal components of the inverter. Optionally, the main circuit board 40 is located near the opening 10b. It is understood that the main circuit board 40 can be fixed to the housing 10 by means of snap-fitting, welding, screwing, riveting, etc.

[0038] In some embodiments, a heat dissipation hole 1021 communicating with the accommodating cavity 10a is further provided on the outer wall of the bottom shell 102. The heat generated by the electronic components in the shell 10 can flow out through the heat dissipation hole 1021 to achieve heat dissipation inside the inverter.

[0039] In some embodiments, a limiting rib 1022 is provided on the inner wall of the shell 10 , and the limiting rib 1022 is used to cooperate with the components on the mounting bracket 20 to limit the mounting bracket 20 and facilitate subsequent fixation of the mounting bracket 20 .

[0040] In some embodiments, a fixing hole 1023 is further provided on the bottom shell 102 , and the fixing hole 1023 is used to fix the mounting bracket 20 .

[0041] In some embodiments, the accommodating chamber 10a includes a first chamber 10aa and a second chamber 10ab that are interconnected, and the first chamber 10aa and the second chamber 10ab are arranged in a direction perpendicular to the depth direction of the accommodating chamber 10a. The shell 10 is provided with a fixing bracket 103, the mounting bracket 20 is located in the first chamber 10aa, and the fixing bracket 103 is located in the second chamber 10ab. The main circuit board 40 is installed on the fixing bracket, and along the depth direction of the accommodating chamber 10a, part of the main circuit board 40 is located on the side of the capacitor assembly 30 facing the opening 10b.

[0042] For the above-mentioned mounting bracket 20 and capacitor assembly 30, as shown in FIG. Figure 2 and Figure 3 As shown, the mounting bracket 20 and the capacitor assembly 30 are both in the accommodating cavity 10 a . The mounting bracket 20 is detachably connected to the housing 10 , and the capacitor assembly 30 is detachably mounted on the mounting bracket 20 .

[0043] For details, please refer to Figure 5-Figure 8 The mounting bracket 20 includes a first mounting bracket 201 or a second mounting bracket 202, and the capacitor assembly 30 includes a first capacitor assembly 301 or a second capacitor assembly 302. The first capacitor assembly 301 is mounted on the first mounting bracket 201, and the second capacitor assembly 302 is mounted on the second mounting bracket 202. It should be noted that the first mounting bracket 201 is used to mount the first capacitor assembly 301 to form one type of inverter, and the second mounting bracket 202 is used to mount the second capacitor assembly 302 to form another type of inverter. The first mounting bracket 201 and the second mounting bracket 202 can be used interchangeably according to actual needs.

[0044] The following describes the frequency converter formed by the combination of the first mounting bracket 201 and the first capacitor assembly 301. Figure 3 、 Figure 5 and Figure 6 .

[0045] The first mounting bracket 201 includes a first surface 201a and a second surface 201b arranged opposite to the first surface 201a. A plurality of first capacitor sleeves 2011 are arranged on the first mounting bracket 201. The plurality of first capacitor sleeves 2011 are arranged adjacent to each other. The first capacitor sleeves 2011 extend from the first surface 201a through the second surface 201b. The first capacitor assembly 301 includes a first circuit board 3011 and a plurality of first capacitors 3012. The number of the first capacitors 3012 corresponds to the number of the first capacitor sleeves 2011. The first circuit board 3011 is electrically connected to the main circuit board 40. The first circuit board 3011 is detachably connected to the first mounting bracket 201 and is arranged on the first surface 201a. The first capacitors 3012 are connected to the first circuit board 3011 and are arranged in the first capacitor sleeve 2011. Among them, the first capacitor sleeve 2011 can allow the first capacitor 3012 to pass through, and plays a role of isolation and protection between adjacent first capacitors 3012. At the same time, the first capacitor sleeve 2011 can also reduce the shaking of the first capacitor 3012, ensuring that the first capacitor 3012 is stably installed on the first mounting bracket 201.

[0046] In some embodiments, a plurality of first limiting claws 20111 are provided at the end of the first capacitor sleeve 2011. The number of first limiting claws 20111 is three, and the three first limiting claws 20111 are arranged in a triangular shape. The first limiting claws 20111 and the first capacitor 3012 abut against each other, and the first limiting claws 20111 can stabilize the first capacitor 3012. Optionally, the number of the plurality of first capacitors 3012 is eight.

[0047] It should be noted that the connection between the first mounting bracket 201 and the bottom case 102 is a detachable connection, which can be achieved by screwing, clamping, etc. Optionally, the first mounting bracket 201 is provided with a connecting screw hole 2012, and one end of a screw is sequentially passed through the connecting screw hole 2012 and screwed into the fixing hole 1023, thereby achieving a detachable connection between the first mounting bracket 201 and the bottom case 102.

[0048] In some embodiments, the first capacitor assembly 301 includes a first insulating pad 3013. A portion of the first insulating pad 3013 is disposed between the first circuit board 3011 and the first mounting bracket 201. A portion of the first insulating pad 3013 is located between the first circuit board 3011 and the first capacitor 3012. One side of the first insulating pad 3013 abuts the first circuit board 3011, and the other side of the first insulating pad 3013 abuts one end of the first capacitor 3012. The first insulating pad 3013 is located between the first circuit board 3011 and the first capacitor 3012. The first insulating pad 3013 can provide insulation protection for the first circuit board 3011, preventing contact short circuits between the first circuit board 3011 and the first capacitor 3012. In addition, when the first circuit board 3011 is installed on the first mounting bracket 201, the first insulating pad 3013 abuts against the side of the first capacitor sleeve 2011 close to the first circuit board 3011, and forms an interference compression with the side of the first capacitor sleeve 2011, which can play a sealing and protective role for the side of the first capacitor sleeve 2011 close to the first circuit board 3011.

[0049] In some embodiments, a first connection terminal 3011 a is further provided on the first circuit board 3011 . The first connection terminal 3011 a is located on a side of the first circuit board 3011 away from the first mounting bracket 201 . The first connection terminal 3011 a is used to electrically connect to the main circuit board 40 .

[0050] In some embodiments, the first capacitor assembly 301 also includes a first insulating plate 3014, which is arranged on a side of the first circuit board 3011 close to the main circuit board 40. The first insulating plate 3014 is located between the main circuit board 40 and the first circuit board 3011. A first through hole 3014a is provided on the first insulating plate 3014, and the first through hole 3014a is for the first connecting terminal 3011a to pass through and connect to the main circuit board 40. The first insulating plate 3014 provides insulating protection for the outer surface of the first circuit board 3011 to avoid contact short circuit between the first circuit board 3011 and the main circuit board 40.

[0051] In some embodiments, along the depth direction of the accommodating cavity 10a, a limiting groove 2013 is provided on the side of the first mounting bracket 201 facing away from the opening 10b. The limiting groove 2013 is arranged opposite to the limiting rib 1022, and the limiting rib 1022 is clamped in the limiting groove 2013, thereby achieving the limitation of the mounting bracket 20 and facilitating the subsequent fixation of the mounting bracket 20.

[0052] The following describes the inverter formed by the combination of the second mounting bracket 202 and the second capacitor assembly 302. The second mounting bracket 202 has a different structure from the first mounting bracket 201, and the second capacitor assembly 302 has a different structure from the first capacitor assembly 301. Figure 2 、 Figure 7 and Figure 8 .

[0053] The second mounting bracket 202 includes an upper surface 202a and a lower surface 202b arranged opposite to the upper surface 202a. A plurality of second capacitor sleeves 2021 are arranged on the second mounting bracket 202. The plurality of second capacitor sleeves 2021 are arranged adjacent to each other. The second capacitor sleeves 2021 extend from the upper surface 202a through the lower surface 202b. The second capacitor assembly 302 includes a second circuit board 3021 and a plurality of second capacitors 3022. The number of the second capacitors 3022 corresponds to the number of the second capacitor sleeves 2021. The second circuit board 3021 is electrically connected to the main circuit board 40. The second circuit board 3021 is detachably connected to the second mounting bracket 202 and is arranged on the upper surface 202a. One end of the second capacitor 3022 is connected to the second circuit board 3021, and the other end of the second capacitor 3022 is passed through the second capacitor sleeve 2021. Among them, the second capacitor sleeve 2021 can allow the second capacitor 3022 to pass through, and plays a role of isolation and protection between adjacent second capacitors 3022. At the same time, the second capacitor sleeve 2021 can also reduce the shaking of the second capacitor 3022, ensuring that the second capacitor 3022 is stably installed on the second mounting bracket 202.

[0054] In some embodiments, a plurality of second limiting claws 20211 extend from the end of the second capacitor sleeve 2021, and the plurality of second limiting claws 20211 are arranged in a triangular pattern. The second limiting claws 20211 abut against the second capacitor 3022. Optionally, there are three second limiting claws 20211, and the three second limiting claws 20211 are arranged in a triangular pattern. The second limiting claws 20211 can provide greater stability for the second capacitor 3022. For example, the plurality of second capacitors 3022 can be six.

[0055] In some embodiments, a connecting through hole 2022 is further provided on the second mounting bracket 202 , and the connecting through hole 2022 extends from the upper surface 202a to the lower surface 202b . The connecting through hole 2022 allows the connecting wire 502 in the inductor component 50 to pass through and connect to the main circuit board 40 .

[0056] In some embodiments, a wire guard ring 2023 is further provided on the second mounting bracket 202. The wire guard ring 2023 is provided in the connecting through hole 2022. The other end of the above-mentioned connecting wire 502 passes through the wire guard ring 2023 to connect to the main circuit board 40. The wire guard ring 2023 can provide anti-friction protection for the connecting wire 502 in the inductor component 50, thereby reducing friction damage between the connecting wire 502 and the second mounting bracket 202.

[0057] In some embodiments, along the depth direction of the accommodating cavity 10a, an isolation slot 2024 is provided on the side of the second mounting bracket 202 facing away from the opening 10b, and the isolation slot 2024 is located on the lower surface 202b. The second capacitor assembly 302 also includes an inductor isolation plate 3023, which is inserted into the isolation slot 2024. The inductor isolation plate 3023 is located between the inductor body 501 and the second capacitor 3022 in the inductor assembly 50. The inductor isolation plate 3023 can avoid mutual interference between the inductor assembly 50 and the second capacitor 3022.

[0058] In some embodiments, the inductor isolation plate 3023 is inserted into the isolation slot 2024 by interference fit.

[0059] In some embodiments, a second connection terminal 30211 is further provided on the second circuit board 3021 . The second connection terminal 30211 is located on a side of the second circuit board 3021 away from the second mounting bracket 202 . The second connection terminal 30211 is used to electrically connect to the main circuit board 40 .

[0060] In some embodiments, the second capacitor assembly 302 also includes a second insulating plate 3024, which is arranged on the side of the second circuit board 3021 close to the main circuit board 40. The second insulating plate 3024 is located between the main circuit board 40 and the second circuit board 3021. A second through hole 30241 is provided on the second insulating plate 3024, and the second through hole 30241 is for the second connecting terminal 30211 to pass through and connect to the main circuit board 40. The second insulating plate 3024 provides insulation protection for the outer surface of the second circuit board 3021 to avoid contact short circuit between the second circuit board 3021 and the main circuit board 40.

[0061] In some embodiments, the second capacitor assembly 302 includes a second insulating pad 3025, which is disposed on a surface of the second circuit board 3021 near the second mounting bracket 202. One side of the second insulating pad 3025 abuts the second circuit board 3021, and the other side of the second insulating pad 3025 abuts one end of the second capacitor 3022. The second insulating pad 3025 is located between the second circuit board 3021 and the second capacitor 3022. The second insulating pad 3025 can provide insulation protection for the second circuit board 3021, preventing contact short circuits between the second circuit board 3021 and the second capacitor 3022.

[0062] In some embodiments, the inverter 1000 includes an inductor component 50, such as Figure 2 and Figure 9As shown, the inductor assembly 50 includes an inductor body 501 and a connecting wire 502. Along the depth direction of the accommodating cavity 10a, the inductor body 501 is located on the side of the second mounting bracket 202 facing away from the opening 10b. One end of the connecting wire 502 is connected to the inductor body 501, and the other end of the connecting wire 502 passes through the connecting through-hole 2022 on the second mounting bracket 202 and connects to the main circuit board 40, thereby establishing a connection between the inductor body 501 and the main circuit board 40. Optionally, the other end of the connecting wire 502 passes through the grommet 2023 and connects to the main circuit board 40.

[0063] In some embodiments, the inverter 1000 includes a heat dissipation assembly 60, which can be used to dissipate heat from the main circuit board 40, the inductor assembly 50, and the capacitor assembly 30. The heat dissipation assembly 60 includes a fan 601 and a heat sink assembly 602. The heat sink assembly 602 is disposed on a side of the main circuit board 40 close to the bottom case 102. The heat sink assembly 602 is provided with multiple heat dissipation channels (not shown). The outlets of the multiple heat dissipation channels are disposed close to the heat dissipation holes 1021. The air outlet of the fan 601 faces the multiple heat dissipation channels. The wind generated by the fan 601 drives the air flow within the multiple heat dissipation channels and out of the heat dissipation holes 1021, thereby achieving internal heat dissipation of the inverter 1000.

[0064] In an embodiment of the present invention, a housing 10, a mounting bracket 20, a capacitor assembly 30, and a main circuit board 40 are provided. The housing 10 is provided with a receiving cavity 10a and an opening 10b communicating with the receiving cavity 10a. The mounting bracket 20 is detachably connected to the housing 10 and disposed in the receiving cavity 10a. The capacitor assembly 30 is detachably mounted on the mounting bracket 20. The main circuit board 40 is disposed in the receiving cavity 10a. The main circuit board 40 is electrically connected to the capacitor assembly 30, and the main circuit board 40 is relatively fixed to the housing 10. In order to manufacture different inverters 1000, in the related art, different types of chassis are usually required to be manufactured. During the production process, many molds are required, the production cost is high, and the process is cumbersome. However, in the inverter 1000 of the present application, different types of inverters 1000 can share the housing 10, and only different mounting brackets 20 need to be manufactured separately, which is conducive to improving process efficiency and reducing costs. Furthermore, since the mounting bracket 20 is detachable from the housing 10, when the inverter 1000 needs to be adapted to different capacitor assemblies 30, the user only needs to replace the mounting bracket 20 with the required one to adapt to different types of electrical appliances, thereby forming different inverters 1000. Compared to a single inverter 1000 that can only be adapted to a single type of electrical appliance, the inverter 1000 of the embodiment of the present application can replace the mounting bracket 20 according to actual needs to obtain different inverters 1000 adapted to different types of electrical appliances, thereby making the inverter 1000 more compatible with various objects and helping to meet different market demands.

[0065] The above are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A frequency converter, characterized in that: include: A housing having a receiving cavity and an opening communicating with the receiving cavity; a mounting bracket, the mounting bracket being detachably connected to the housing and disposed in the accommodating cavity; A capacitor assembly is detachably mounted on the mounting bracket, and the capacitor assembly is mounted on the mounting bracket; A main circuit board is disposed in the accommodating cavity, the main circuit board is electrically connected to the capacitor assembly, and the main circuit board is relatively fixed to the shell.

2. The frequency converter according to claim 1, characterized in that: The mounting bracket includes a first mounting bracket, the first mounting bracket includes a first surface and a second surface opposite to the first surface, a plurality of first capacitor sleeves are provided on the first mounting bracket, the plurality of first capacitor sleeves are adjacent to each other, and the first capacitor sleeves extend from the first surface through the second surface; The capacitor assembly includes a first capacitor assembly, which includes a first circuit board and multiple first capacitors. The number of the first capacitors corresponds to the number of the first capacitor sleeves. The first circuit board is electrically connected to the main circuit board. The first circuit board is detachably connected to the first mounting bracket and is arranged on the first surface. The first capacitors are connected to the first circuit board, and the first capacitors are arranged in the first capacitor sleeve.

3. The frequency converter according to claim 2, characterized in that: The first capacitor assembly includes a first insulating pad, a portion of which is arranged between the first circuit board and the first mounting bracket, a portion of which is located between the first circuit board and the first capacitor, one side of the first insulating pad abuts against the first circuit board, and the other side of the first insulating pad abuts against one end of the first capacitor.

4. The frequency converter according to claim 2, characterized in that: The first circuit board is further provided with a first connecting terminal, the first connecting terminal is located on a side of the first circuit board away from the first mounting bracket, and the first connecting terminal is used to be electrically connected to the main circuit board; The first capacitor assembly also includes a first insulating plate, which is arranged on a side of the first circuit board close to the main circuit board. The first insulating plate is located between the main circuit board and the first circuit board. A first through hole is provided on the first insulating plate, and the first through hole is for the first connecting terminal to pass through and connect to the main circuit board.

5. The frequency converter according to claim 2, characterized in that: Along the depth direction of the accommodating cavity, a limiting groove is provided on a side of the first mounting bracket facing away from the opening; A limiting rib is provided on the inner side wall of the shell, the limiting rib is arranged opposite to the limiting groove, and the limiting rib is clamped in the limiting groove.

6. The frequency converter according to claim 1, characterized in that: The mounting bracket includes a second mounting bracket, the second mounting bracket includes an upper surface and a lower surface opposite to the upper surface, a plurality of second capacitor sleeves are provided on the second mounting bracket, the plurality of second capacitor sleeves are adjacent to each other, and the second capacitor sleeves extend from the upper surface to the lower surface; The capacitor assembly includes a second capacitor assembly, which includes a second circuit board and multiple second capacitors. The number of the second capacitors corresponds to the number of the second capacitor sleeves. The second circuit board is electrically connected to the main circuit board. The second circuit board is detachably connected to the second mounting bracket and is arranged on the upper surface. The second capacitors are connected to the second circuit board, and the second capacitors are arranged in the second capacitor sleeves.

7. The frequency converter according to claim 6, characterized in that: The second mounting bracket is further provided with a connecting through hole, the connecting through hole extending from the upper surface to the lower surface; The inverter further includes an inductor assembly, which is disposed in the accommodating cavity. The inductor assembly includes an inductor body and a connecting wire. Along the depth direction of the accommodating cavity, the inductor body is located on a side of the second mounting bracket facing away from the opening. The second mounting bracket is further provided with a wire guard ring, which is arranged in the connecting through hole. One end of the connecting wire is connected to the inductor body, and the other end of the connecting wire passes through the wire guard ring and is connected to the main circuit board.

8. The frequency converter according to claim 7, characterized in that: Along the depth direction of the accommodating cavity, an isolation slot is provided on a side of the second mounting bracket away from the opening, and the isolation slot is located on the lower surface; The second capacitor assembly further includes an inductor isolation plate, which is plugged into the isolation slot and located between the inductor body and the second capacitor.

9. The frequency converter according to claim 6, characterized in that: The second circuit board is further provided with a second connection terminal, the second connection terminal is located on a side of the second circuit board away from the second mounting bracket, and the second connection terminal is used to be electrically connected to the main circuit board; The second capacitor assembly also includes a second insulating plate, which is arranged on a side of the second circuit board close to the main circuit board. The second insulating plate is located between the main circuit board and the second circuit board. A second through hole is provided on the second insulating plate, and the second through hole is for the second connecting terminal to pass through and connect to the main circuit board.

10. The frequency converter according to any one of claims 1 to 9, characterized in that: The mounting bracket includes a first mounting bracket, a first capacitor sleeve is provided on the first mounting bracket, and a plurality of first limiting claws are extended from the end of the first capacitor sleeve; the capacitor assembly includes a first capacitor assembly, the first capacitor assembly includes a first circuit board and a first capacitor, the first capacitor is connected to the first circuit board and is inserted into the first capacitor sleeve, and the first capacitor is abutted against the plurality of first limiting claws; or, The mounting bracket includes a second mounting bracket, a second capacitor sleeve is provided on the second mounting bracket, and a plurality of second limiting claws are extended from the end of the second capacitor sleeve; the capacitor assembly includes a second capacitor assembly, the second capacitor assembly includes a second circuit board and a second capacitor, the second capacitor is connected to the second circuit board and is inserted into the second capacitor sleeve, and the second capacitor is against the plurality of second limiting claws.

11. The frequency converter according to any one of claims 1 to 9, characterized in that: The accommodating chamber includes a first chamber and a second chamber that are interconnected, and the first chamber and the second chamber are arranged in a direction perpendicular to the depth direction of the accommodating chamber; The mounting bracket is located in the first chamber, the shell is provided with a fixing bracket, the fixing bracket is located in the second chamber, the main circuit board is installed on the fixing bracket, and along the depth direction of the accommodating cavity, part of the main circuit board is located on the side of the capacitor assembly facing the opening.

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