Frequency converter and electric device

Abstract

The utility model discloses a frequency converter and an electric device. The frequency converter comprises a housing; the isolation plate assembly is arranged in the shell and comprises an isolation plate body and a wiring terminal, the isolation plate body is used for dividing the interior of the shell into an installation cavity and a wiring cavity, at least one part of the wiring terminal is located in the installation cavity, and at least one part of the wiring terminal is located in the wiring cavity; the circuit assembly is installed in the installation cavity and connected with the part, located in the installation cavity, of the wiring terminal; the first cover body is arranged on the shell and is suitable for opening and closing the mounting cavity, and the second cover body is arranged on the shell and is suitable for opening and closing the wiring cavity. According to the technical scheme, the wiring cavity is opened through the second cover body for wiring, the external wiring area is isolated from the internal circuit assembly mounting area, the risk that the internal circuit assembly is exposed during mounting operation is avoided to a certain extent, the influence of the severe environment of a mounting site on the circuit assembly is effectively reduced, and the reliability is improved.

Description

Technical Field

[0001] The present application relates to the field of batteries, and in particular to a frequency converter and an electrical device. Background Art

[0002] Some electrical devices will expose their internal circuit components on site during wiring and installation. For example, marine inverters are installed simultaneously during the ship installation and construction process. There are severe conditions such as welding shavings and paint flying at the installation site. When the marine inverter is wired and installed, the upper cover of the device needs to be removed, and the internal circuit components of the inverter are exposed to the on-site environment, which can easily cause the exposed internal devices to be contaminated and cause problems such as short circuits. Utility Model Content

[0003] In view of the above problems, the present application provides a frequency converter and an electrical device, which can reduce the probability of contamination and short circuit caused by exposure of circuit components.

[0004] In a first aspect, the present application provides an inverter, comprising: a shell, the shell defining a storage space; an isolation plate assembly, the isolation plate assembly being arranged in the shell and comprising an isolation plate body and a wiring terminal, the isolation plate body being used to separate the storage space into an installation cavity and a wiring cavity, at least a portion of the wiring terminal being located in the installation cavity and at least a portion of the wiring terminal being located in the wiring cavity; a circuit assembly, the circuit assembly being installed in the installation cavity and connected to a portion of the wiring terminal located in the installation cavity; a first cover body and a second cover body, the first cover body being arranged on the shell and suitable for opening and closing the installation cavity, the second cover body being arranged on the shell and suitable for opening and closing the wiring cavity.

[0005] In the technical solution of the embodiment of the present application, the outer shell is divided into an installation cavity and a wiring cavity by an isolation plate body, and a second cover body is provided on the wiring cavity, so that the wiring cavity can be opened through the second cover body for wiring, and the external wiring area is isolated from the internal circuit component installation area, thereby avoiding the risk of exposure of the internal circuit components during installation operations to a certain extent, effectively reducing the impact of the harsh environment of the installation site on the internal circuit components of the inverter, and improving the reliability of the inverter.

[0006] In some embodiments, the isolation plate body includes at least two isolation plates, at least two of which are arranged relative to each other in a direction perpendicular to the arrangement of the installation cavity and the wiring cavity, and the wiring terminal is clamped between the at least two isolation plates. In the above technical solution, the isolation plate assembly can both isolate the two cavities and solve the problem of fixing the wiring terminal.

[0007] In some embodiments, one of the two adjacent isolation plates has a convex portion, and the other of the two adjacent isolation plates has a concave portion, and the convex portion is plugged into the concave portion. In the above technical solution, the two adjacent isolation plates cooperate with each other through the convex portion and the concave portion, which can play a positioning role in the assembly of multiple isolation plates, facilitate the assembly of the isolation plates, and prevent the isolation plates from being displaced after assembly, thereby affecting the installation of the isolation plate body in the shell.

[0008] In some embodiments, the terminal block is arranged between the protrusion and the corresponding groove. In the above technical solution, the arrangement of the protrusion and the groove can also play a role in positioning the installation of the terminal block, which is not only convenient for the installation of the terminal block, but also can play a role in limiting the terminal block, and to a certain extent avoid the misalignment of multiple terminal blocks, resulting in the failure to meet the safety distance requirements between adjacent terminal blocks, etc., thereby improving the reliability of the inverter.

[0009] In some embodiments, an avoidance groove is provided at the protrusion or the groove, and the wiring terminal is provided in the avoidance groove. By providing the avoidance groove, the problem that the protrusion and the groove are difficult to fit into place due to the presence of the wiring terminal can be avoided to a certain extent, the reliability of the fit between the protrusion and the groove is improved, and the sealing of the fit between two adjacent isolation plates is improved, thereby improving the sealing effect of the installation cavity and reducing the impact of the harsh environment of the installation site on the circuit components.

[0010] In some embodiments, the height of the protrusion is smaller than the depth of the recessed groove, and the terminal is clamped between the protrusion and the groove, where the width of the groove matches the width of the terminal, and the height difference between the protrusion and the groove matches the thickness of the terminal, so that the terminal can be clamped after the protrusion and the groove are in place, thereby achieving fixation of the terminal without the need for additional grooving, simplifying the structure, and facilitating manufacturing and assembly.

[0011] In some embodiments, the isolation plate extends along a first direction, the wiring terminals include a plurality of wiring terminals, and the plurality of wiring terminals are arranged at intervals along the first direction. In the above technical solution, a safe distance is ensured to a certain extent between two adjacent wiring terminals.

[0012] In some embodiments, the isolation plate body includes a first isolation plate, a second isolation plate and a third isolation plate, the first isolation plate and the second isolation plate are connected to each other, the third isolation plate is located between the first isolation plate and the second isolation plate, the third isolation plate is connected to at least one of the first isolation plate and the second isolation plate, at least one wiring terminal is provided between the first isolation plate and the second isolation plate, and at least one wiring terminal is provided between the third isolation plate and the first isolation plate and / or the second isolation plate. In the above technical solution, the isolation plate body can both realize the isolation of the two cavities and solve the problem of fixing the wiring terminals.

[0013] In some embodiments, the first isolation plate has a first groove that is recessed toward a side away from the second isolation plate, the second isolation plate has a first convex portion that protrudes toward a side close to the first isolation plate, and a mounting groove that is recessed toward a side away from the first isolation plate, the first convex portion is plugged into and matched with the first groove, and the third isolation plate is disposed in the mounting groove. In the above technical scheme, the first isolation plate and the second isolation plate cooperate with each other through the first convex portion and the first groove, which can play a role in positioning the assembly of the first isolation plate and the second isolation plate, facilitate the assembly of the isolation plates, and prevent problems such as misalignment and displacement after the two isolation plates are assembled; the third isolation plate is installed at the mounting groove, and the third isolation plate can be clamped between the second isolation plate and the first isolation plate, thereby improving the stability of the third isolation plate, and at the same time facilitating the restriction of multiple wiring terminals at different heights, facilitating the connection of wiring terminals with other structures, etc.

[0014] In some embodiments, the first protrusion and the first groove have at least two mounting holes, one mounting hole is used to mount the wiring terminal, and the other mounting hole is used to connect the first isolation plate and the second isolation plate. In the above technical solution, the first protrusion and the first groove can not only play a role in fixing the assembly of the first isolation plate and the second isolation plate, but also realize the fixing of the isolation plate installation, thereby improving the compactness of the structure and realizing full use of space.

[0015] In some embodiments, the first protrusions include two, and the mounting groove is disposed between the two first protrusions. In the above technical solution, after the first protrusion and the first groove are in place, the third isolation plate can be clamped between the two first protrusions in the length direction of the first isolation plate and the second isolation plate, which can improve the stability of the third isolation plate.

[0016] In some embodiments, the bottom wall of the installation groove has a second groove that is recessed away from the first isolation plate, and the third isolation plate has a second protrusion, and the second groove is plugged into the second protrusion. In the above technical solution, the third isolation plate and the second isolation plate cooperate with each other through the second protrusion and the second groove, which can play a positioning role in the assembly of the third isolation plate and the second isolation plate, facilitate the assembly of the isolation plates, and prevent the occurrence of misalignment and displacement after the two isolation plates are assembled.

[0017] In some embodiments, the second grooves include a plurality of grooves, the second protrusions include a plurality of grooves, the plurality of the second protrusions correspond to the plurality of the second grooves one by one, and one of the wiring terminals is sandwiched between any corresponding second grooves and second protrusions. The second isolation plate has a mounting hole for connecting the third isolation plate, and the mounting hole is located between two adjacent second grooves. In the above technical solution, the plurality of wiring terminals are limited in the plurality of second grooves, so that a safe distance can be maintained between two adjacent wiring terminals. At the same time, the fastener connecting the third isolation plate and the second isolation plate is located outside the second groove, so that there is also a certain distance between the wiring terminal and the fastener, reducing the risk of short circuit.

[0018] In some embodiments, a liquid cooling plate is provided in the housing, at least a portion of the liquid cooling plate is located in the installation cavity, and the isolation plate assembly is supported on the liquid cooling plate and fixedly connected to the liquid cooling plate. In the above technical solution, the inverter adopts liquid cooling to dissipate heat, which can improve the heat dissipation effect and reduce the size and volume of the inverter and the manufacturing cost compared with air cooling and other methods; the isolation plate assembly is connected to the liquid cooling plate to realize the fixation of the isolation plate assembly in the housing, making the installation of the isolation plate assembly more convenient.

[0019] In some embodiments, the circuit assembly includes an electrical component, the electrical component has a first side and a second side arranged relatively to each other, the first side of the electrical component has a fixing member suitable for fixing in the housing, and a thermal pad is provided between the second side of the electrical component and the inner wall surface of the housing. In the above technical solution, a thermal pad is provided between the second side of the electrical component and the inner wall surface of the housing. On the one hand, the thermal pad can limit the installation of the electrical component, avoid the problem of difficulty in fixing due to excessive movement of the electrical component, and improve the installation accuracy of the electrical component. On the other hand, the thermal pad has a heat-conducting effect, and can conduct the heat generated by the electrical component when it is working to the housing to play a heat dissipation role.

[0020] In some embodiments, the electrical components include a plurality of thermal pads, the thermal pads include a corresponding plurality of thermal pads or the thermal pads include one, and the thermal pad extends along the arrangement direction of the plurality of electrical components. In the above technical solution, by using a plurality of thermal pads, it is convenient to effectively limit the plurality of electrical components; by using a single thermal pad, the number of components can be reduced and the assembly efficiency can be improved.

[0021] In some embodiments, the thermal pad is bonded to the housing. In the above technical solution, the thermal pad can be pre-installed in the housing, so that when the electrical component is installed and the electrical component abuts against the thermal pad, the fixing part of the electrical component and the connecting part in the housing can cooperate, and the fixing method of the thermal pad is simple and convenient, low in cost, and convenient for limiting the installation of the electrical component, thereby improving assembly efficiency.

[0022] In the second aspect, the present application provides an electrical device, including the frequency converter of the first aspect of the present application. In the above technical solution, by adopting the above frequency converter, the risk of internal circuit components being exposed during installation is avoided to a certain extent, the impact of the harsh environment of the installation site on the circuit components is effectively reduced, and reliability is improved.

[0023] In some embodiments, the electrical device is a ship.

[0024] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0026] Figure 1 A schematic diagram of a frequency converter provided in some embodiments of the present application, wherein the second cover body closes the wiring cavity;

[0027] Figure 2 A schematic diagram of a frequency converter provided by some embodiments of the present application, wherein the second cover opens the wiring cavity;

[0028] Figure 3 An internal schematic diagram of a frequency converter provided in some embodiments of the present application;

[0029] Figure 4 A schematic diagram of an isolation plate assembly provided for some embodiments of the present application;

[0030] Figure 5 A schematic diagram of installing an isolation plate assembly provided in some embodiments of the present application;

[0031] Figure 6 A partial cross-sectional view of a frequency converter provided in some embodiments of the present application;

[0032] Figure 7 A schematic diagram of an electrical device provided in some embodiments of the present application.

[0033] Reference numerals:

[0034] Frequency converter 1000, power consumption device 2000,

[0035] Housing 10, installation cavity 101, wiring cavity 102, first cover 21, second cover 22,

[0036] Isolation plate body 30, first isolation plate 31, first groove 311, second isolation plate 32, first protrusion 321, mounting groove 322, second groove 323, third isolation plate 33, second protrusion 331, avoidance groove 34, mounting hole 35, avoidance hole 36, terminal 40, circuit assembly 50, electrical component 51, fixing part 511, liquid cooling plate 60, thermal pad 70, fastener 80. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0038] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by technicians in the technical field to which this application belongs; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0039] Reference to "embodiment" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments.

[0040] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0041] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0042] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary descriptions and should not constitute any limitation to the present application.

[0043] The term "plurality" used in the present application refers to two or more (including two).

[0044] Some inverters need to be wired and routed at the installation site. However, many installation sites have severe conditions such as welding shavings and paint flying. At this time, the circuit components inside the inverter are exposed to the environment of the installation site and are easily contaminated, causing short circuits and other problems.

[0045] To this end, the present application proposes a frequency converter, comprising: a housing, an isolation plate assembly, a circuit assembly, a first cover body and a second cover body, the isolation plate assembly is arranged in the housing and comprises an isolation plate body and a wiring terminal, the isolation plate body is used to separate the housing into an installation cavity and a wiring cavity, at least a part of the wiring terminal is located in the installation cavity and at least a part of the wiring terminal is located in the wiring cavity; the circuit assembly is installed in the installation cavity and is connected to the part of the wiring terminal located in the installation cavity; the first cover body is arranged on the housing and is suitable for opening and closing the installation cavity, and the second cover body is arranged on the housing and is suitable for opening and closing the wiring cavity.

[0046] In the inverter of the above-mentioned structure, the shell is divided into an installation cavity and a wiring cavity by an isolation plate body, and a second cover body is provided on the wiring cavity, so that the wiring cavity can be opened through the second cover body for wiring, and the external wiring area is isolated from the internal circuit component installation area, which to a certain extent avoids the risk of exposure of the internal circuit components during installation operations, effectively reduces the impact of the harsh environment of the installation site on the internal circuit components of the inverter, and improves the reliability of the inverter.

[0047] The following describes a frequency converter 1000 according to an embodiment of the present application with reference to the accompanying drawings.

[0048] like Figure 1-Figure 6 As shown, the inverter 1000 according to the embodiment of the present application includes: a housing 10, an isolation plate assembly, a circuit assembly 50, a first cover body 21 and a second cover body 22, the isolation plate assembly is arranged in the housing 10 and includes an isolation plate body 30 and a wiring terminal 40, the isolation plate body 30 is used to separate the housing 10 into an installation cavity 101 and a wiring cavity 102, at least a part of the wiring terminal 40 is located in the installation cavity 101 and at least a part of the wiring terminal 40 is located in the wiring cavity 102; the circuit assembly 50 is installed in the installation cavity 101 and is connected to the part of the wiring terminal 40 located in the installation cavity 101; the first cover body 21 is arranged on the housing 10 and is suitable for opening and closing the installation cavity 101, and the second cover body 22 is arranged on the housing 10 and is suitable for opening and closing the wiring cavity 102.

[0049] The housing 10, i.e., the outermost shell structure of the inverter 1000, can define a receiving space for receiving the circuit assembly 50, the isolation plate assembly, the liquid cooling plate 60, etc. The receiving space can be in the form of an open top.

[0050] The isolation board body 30 is roughly formed into a plate-like structure. The isolation board body 30 is arranged in the shell 10 to divide the accommodating space into an installation cavity 101 and a wiring cavity 102. The circuit component 50 includes a power component and a control component, etc. The circuit component 50 is installed in the installation cavity 101.

[0051] The first cover 21 is disposed on the housing 10 , and the first cover 21 can close the installation cavity 101 . When the first cover 21 opens the installation cavity 101 , the circuit assembly 50 can be installed into the housing 10 from the open side of the installation cavity 101 .

[0052] The second cover body 22 is arranged on the outer shell 10, and the first cover body 21 and the second cover body 22 cooperate with the outer shell 10 to close the accommodating space, wherein the first cover body 21 and the second cover body 22 can be connected to the outer shell 10 respectively, at this time, the first cover body 21 corresponds to the installation cavity 101, and the second cover body 22 corresponds to the wiring cavity 102, and the two cover bodies can be arranged side by side; or the first cover body 21 can be connected to the outer shell 10, and a wiring window is opened on the first cover body 21, and the wiring window and the wiring cavity 102 are correspondingly connected to each other, so that the second cover body 22 can cooperate with the first cover body 21 to open and close the wiring cavity 102.

[0053] A portion of the wiring terminal 40 is located in the wiring cavity 102, and the second cover body 22 can open and close the wiring cavity 102. When the second cover body 22 opens the wiring cavity 102, wiring operations can be performed. That is, the isolation plate body 30 separates the wiring area and the internal circuit component 50 area. Since the wiring cavity 102 has an independent cover body, the first cover body 21 closes the installation cavity 101, so when wiring on site, it is only necessary to open the second cover body 22 to complete the wiring.

[0054] According to the inverter 1000 of the embodiment of the present application, the inside of the housing 10 is divided into an installation cavity 101 and a wiring cavity 102 by an isolation plate body 30. The wiring cavity 102 has a second cover body 22, so that the wiring cavity 102 can be opened through the second cover body 22 for wiring, and the external wiring area is isolated from the installation area of ​​the internal circuit component 50, which to a certain extent avoids the risk of exposure of the internal circuit component 50 during the installation operation, effectively reduces the impact of the harsh environment of the installation site on the internal circuit component 50 of the inverter 1000, and improves the reliability of the inverter 1000.

[0055] like Figure 4 and Figure 5 As shown, in some embodiments, the isolation plate body 30 includes at least two isolation plates, and the at least two isolation plates are arranged relative to each other in a direction perpendicular to the arrangement of the installation cavity 101 and the wiring cavity 102, and the wiring terminal 40 is clamped between the at least two isolation plates.

[0056] The isolation plate body 30 includes two isolation plates or more isolation plates, and the multiple isolation plates can be arranged along the first direction F1 or the second direction F2, so that the isolation plate body 30 as a whole extends along the first direction F1 or the second direction F2, and the separated installation cavity 101 and wiring cavity 102 are arranged along the third direction F3, and the third direction F3, the second direction F2 and the first direction F1 are perpendicular to each other.

[0057] The connecting terminal 40 can be clamped between two adjacent isolation plates, thereby fixing the connecting terminal 40. Since the arrangement direction of the multiple isolation plates is perpendicular to the arrangement direction of the installation cavity 101 and the wiring cavity 102, a part of the connecting terminal 40 can be located in the installation cavity 101, and at least a part can be located in the wiring cavity 102. In other words, the isolation plate assembly can both isolate the two cavities and solve the problem of fixing the connecting terminal 40.

[0058] In some examples, the terminal block 40 is directly clamped between two isolation plates, and the two isolation plates are fixedly connected; in other examples, the terminal block 40 is connected to at least one isolation plate via a fastener 80 to improve the stability of the terminal block 40; in still other examples, the terminal block 40 is bonded and fixed to at least one isolation plate to improve the stability of the terminal block 40.

[0059] like Figure 5 As shown, in some embodiments, one of two adjacent isolation plates has a convex portion, and the other of two adjacent isolation plates has a concave portion, and the convex portion is plug-fitted with the concave portion.

[0060] like Figure 5 As shown, one isolation plate has a convex portion and the other isolation plate has a groove. The two adjacent isolation plates cooperate with each other through the convex portion and the groove, which can play a positioning role in the assembly of multiple isolation plates, facilitate the assembly of the isolation plates, and prevent problems such as misalignment and displacement after the isolation plates are assembled, thereby affecting the installation of the isolation plate body 30 in the outer shell 10.

[0061] like Figure 5 As shown, in some embodiments, the terminal 40 is sandwiched between the protrusion and the corresponding groove.

[0062] The two adjacent isolation plates are matched through the protrusion and the groove, and the terminal 40 is clamped between the protrusion and the groove, so that the setting of the protrusion and the groove can also play a positioning role in the installation of the terminal 40, which is not only convenient for the installation of the terminal 40, but also can play a limiting role for the terminal 40, to a certain extent avoiding the misalignment of multiple terminals 40 resulting in the failure to meet the safety distance requirements between adjacent terminals 40, thereby improving the reliability of the inverter 1000.

[0063] like Figure 5As shown, in some embodiments, the bottom wall of the groove is further provided with an avoidance groove 34, or the avoidance groove 34 can be provided on the convex portion, and the terminal 40 is provided in the avoidance groove 34, wherein the width dimension of the avoidance groove 34 matches the width dimension of the terminal 40, thereby further limiting the position of the terminal 40, reducing the probability of the terminal 40 being misplaced, and at the same time, the terminal 40 can be pressed after the convex portion and the groove are matched. By providing the avoidance groove 34, the problem that the convex portion and the groove are difficult to fit into place due to the existence of the terminal 40 can be avoided to a certain extent, and the reliability of the matching between the convex portion and the groove can be improved, thereby improving the sealing of the matching point of the two adjacent isolation plates, improving the sealing effect of the installation cavity 101, and reducing the impact of the harsh environment of the installation site on the circuit component 50.

[0064] like Figure 5 As shown, in some embodiments, the height of the protrusion is smaller than the depth of the recess, and the terminal 40 is clamped between the protrusion and the recess, where the width of the recess matches the width of the terminal 40, and the height difference between the protrusion and the recess matches the thickness of the terminal 40, so that the terminal 40 can be clamped after the protrusion and the recess are in place, thereby fixing the terminal 40 without the need for additional grooving, simplifying the structure, and facilitating manufacturing and assembly.

[0065] like Figure 4 and Figure 5 As shown, in some embodiments, the isolation plate extends along a first direction, and the connection terminal 40 includes a plurality of connection terminals 40 , and in the first direction, the plurality of connection terminals 40 are arranged at intervals.

[0066] like Figure 4 As shown, a plurality of isolation plates are arranged along the second direction F2, and each isolation plate extends along the first direction F1. In the first direction F1, a plurality of connection terminals 40 are arranged at intervals, which ensures a safe distance between two adjacent connection terminals 40 to a certain extent.

[0067] In the second direction F2, some of the wiring terminals 40 are higher than other wiring terminals 40, so as to further increase the distance between adjacent wiring terminals 40 and facilitate the distinction between different wiring terminals 40 for subsequent wiring.

[0068] In addition, the positions of each connection terminal 40 on both sides of the isolation board body 30 can be the same or different, so as to facilitate connection with the circuit component 50 and facilitate external wiring operations.

[0069] like Figure 4 and Figure 5As shown, in some embodiments, the isolation plate body 30 includes a first isolation plate 31, a second isolation plate 32 and a third isolation plate 33. The first isolation plate 31 and the second isolation plate 32 are connected to each other, the third isolation plate 33 is located between the first isolation plate 31 and the second isolation plate 32, the third isolation plate 33 is connected to at least one of the first isolation plate 31 and the second isolation plate 32, at least one wiring terminal 40 is provided between the first isolation plate 31 and the second isolation plate 32, and at least one wiring terminal 40 is provided between the third isolation plate 33 and the first isolation plate 31 and / or the second isolation plate 32.

[0070] like Figure 3 and Figure 4 As shown, the isolation plate body 30 includes three isolation plates, which are arranged along the second direction F2. The shape of the multiple isolation plates after splicing matches the cross-section inside the shell 10, so that the installation cavity 101 and the wiring cavity 102 can be separated inside the shell 10.

[0071] A wiring terminal 40 is sandwiched between the first isolation plate 31 and the second isolation plate 32, and a wiring terminal 40 is sandwiched between the third isolation plate 33 and the second isolation plate 32, thereby achieving fixation of multiple wiring terminals 40. With the cooperation of multiple isolation plates, multiple wiring terminals 40 can be arranged at intervals in the first direction F1, so that a safe distance is maintained between the multiple wiring terminals 40, reducing the risk of short circuit.

[0072] Therefore, the isolation plate body 30 can not only realize the isolation of the two cavities, but also solve the problem of fixing the connection terminal 40 .

[0073] like Figure 5 As shown, in some embodiments, the first isolation plate 31 has a first groove 311 that is recessed toward the side away from the second isolation plate 32, the second isolation plate 32 has a first protrusion 321 that protrudes toward the side close to the first isolation plate 31, and an installation groove 322 that is recessed toward the side away from the first isolation plate 31, the first protrusion 321 is plugged into the first groove 311, and the third isolation plate 33 is arranged in the installation groove 322.

[0074] like Figure 5 As shown, the first isolation plate 31 is disposed above the second isolation plate 32 , the upper portion of the second isolation plate 32 has a first protrusion 321 protruding upward, and the upper portion of the second isolation plate 32 has a mounting groove 322 recessed downward.

[0075] The first isolation plate 31 and the second isolation plate 32 cooperate with the first protrusion 321 and the first groove 311 to position the assembly of the first isolation plate 31 and the second isolation plate 32, which is convenient for the assembly of the isolation plates and prevents the two isolation plates from being misaligned and displaced after assembly. The third isolation plate 33 is installed in the installation groove 322, and the third isolation plate 33 can be clamped between the second isolation plate 32 and the first isolation plate 31, thereby improving the stability of the third isolation plate 33 and facilitating the restriction of multiple wiring terminals 40 at different heights, facilitating the connection of the wiring terminals 40 with other structures, etc.

[0076] like Figure 5 As shown, in some embodiments, the first protrusion 321 and the first groove 311 have at least two mounting holes 35 , one mounting hole 35 is used to install the terminal block 40 , and one mounting hole 35 is used to connect the first isolation plate 31 and the second isolation plate 32 .

[0077] like Figure 5 As shown, the first isolation plate 31 and the second isolation plate 32 can be fixedly connected by the fastener 80, and the terminal 40 can be connected to the first protrusion 321 by the fastener 80. At this time, the fastener 80 of the same size can be used for connection to improve the versatility of the parts. Therefore, the first protrusion 321 and the first groove 311 can not only play a role in fixing the assembly of the first isolation plate 31 and the second isolation plate 32, but also realize the fixation of the isolation plate installation, thereby improving the compactness of the structure and realizing full utilization of the space.

[0078] like Figure 5 As shown, in some embodiments, a portion of the first protrusion 321 is recessed in a direction away from the first isolation plate 31 to form an avoidance groove 34, the bottom of the avoidance groove 34 has a mounting hole 35, the wiring terminal 40 is disposed in the avoidance groove 34, and is fixedly connected to the second isolation plate 32 by a fastener 80.

[0079] By providing an avoidance groove 34 on the first protrusion 321, the position of the terminal block 40 can be limited, thereby reducing the probability of the terminal block 40 being misaligned. At the same time, the first protrusion 321 and the first groove 311 can be matched to press the terminal block 40, which can avoid to a certain extent the problem that the first protrusion 321 and the first groove 311 are difficult to match into place due to the existence of the terminal block 40, thereby improving the reliability of the matching between the first protrusion 321 and the first groove 311, thereby improving the sealing of the matching point between the first isolation plate 31 and the second isolation plate 32, improving the sealing effect of the installation cavity 101, and reducing the impact of the harsh environment of the installation site on the circuit component 50.

[0080] like Figure 5As shown, in some embodiments, the first protrusion 321 includes two, and the mounting groove 322 is disposed between the two first protrusions 321 .

[0081] like Figure 5 As shown, the first protrusions 321 include two, which are arranged at intervals along the length direction of the second isolation plate 32, and the first grooves 311 include two corresponding ones, which are arranged at intervals along the length direction of the first isolation plate 31. The two first protrusions 321 and the two first grooves 311 correspond to each other one by one, and the installation groove 322 is located between the two first protrusions 321. Therefore, after the first protrusions 321 and the first grooves 311 are matched in place, in the length direction of the first isolation plate 31 and the second isolation plate 32, the third isolation plate 33 can be clamped between the two first protrusions 321, which can improve the stability of the third isolation plate 33.

[0082] In addition, in the length direction of the second isolation plate 32, the lengths of the two first protrusions 321 can be the same or different. When the lengths of the two first protrusions 321 are different, they can further guide the assembly of the first isolation plate 31 and the second isolation plate 32 to prevent assembly errors from affecting the installation of the isolation plate body 30 in the outer shell 10.

[0083] like Figure 5 As shown, in some embodiments, the bottom wall of the mounting groove 322 has a second groove 323 that is recessed away from the first isolation plate 31 , and the third isolation plate 33 has a second protrusion 331 , and the second groove 323 is plugged into and matched with the second protrusion 331 .

[0084] like Figure 5 As shown, a portion of the bottom wall of the mounting groove 322 is recessed downward to form a second groove 323 , and the third isolation plate 33 is disposed at the mounting groove 322 . The lower portion of the third isolation plate 33 has a second protrusion 331 protruding downward.

[0085] The third isolation plate 33 and the second isolation plate 32 cooperate with each other through the second protrusion 331 and the second groove 323, which can play a positioning role in the assembly of the third isolation plate 33 and the second isolation plate 32, facilitate the assembly of the isolation plates, and prevent the two isolation plates from being misaligned and displaced after assembly.

[0086] like Figure 5 As shown, in some embodiments, the second grooves 323 include multiple, the second protrusions 331 include multiple, the multiple second grooves 323 and the multiple second protrusions 331 correspond one to one, and a connecting terminal 40 is sandwiched between any corresponding second grooves 323 and second protrusions 331. The second isolation plate 32 has a mounting hole 35 connected to the third isolation plate 33, and the mounting hole 35 is located between two adjacent second grooves 323.

[0087] like Figure 5 As shown, the third isolation plate 33 and the second isolation plate 32 can be fixedly connected by a fastener 80, the terminal 40 is arranged at the second groove 323, and the terminal 40 can be connected to the second isolation plate 32 by the fastener 80, and multiple terminals 40 are limited in multiple second grooves 323, so that a safe distance can be maintained between two adjacent terminals 40. At the same time, the fastener 80 connecting the third isolation plate 33 and the second isolation plate 32 is located outside the second groove 323, so that there is also a certain distance between the terminal 40 and the fastener 80, thereby reducing the risk of short circuit.

[0088] In some examples, the height of the second protrusion 331 is smaller than the depth of the second groove 323, and the terminal 40 is clamped between the second protrusion and the second groove 323. Here, the width dimension of the second groove 323 matches the width dimension of the terminal 40, and the height difference between the second protrusion 331 and the second groove 323 matches the thickness of the terminal 40. Therefore, the terminal 40 can be clamped after the second protrusion 331 and the second groove 323 are in place, thereby fixing the terminal 40 without the need for additional grooving, simplifying the structure, and facilitating manufacturing and assembly.

[0089] like Figure 5 As shown, in some embodiments, a liquid cooling plate 60 is disposed in the housing 10 , at least a portion of the liquid cooling plate 60 is located in the installation cavity 101 , and the isolation plate assembly is supported on the liquid cooling plate 60 and fixedly connected to the liquid cooling plate 60 .

[0090] A liquid cooling plate 60 is disposed in the housing 10 . The liquid cooling plate 60 may be completely located inside the housing 10 , or may be a part of the bottom of the housing 10 , that is, the liquid cooling plate 60 cooperates with the housing 10 to form a receiving space.

[0091] The circuit component 50 can be arranged above the liquid cooling plate 60, and the circuit component 50 can be attached to the liquid cooling plate 60. Here, the circuit component 50 can be directly fixedly connected to the liquid cooling plate 60, or the circuit component 50 can be installed and fixed in the shell 10, and the circuit component 50 is in contact with the liquid cooling plate 60, thereby achieving heat dissipation of the circuit component 50.

[0092] Therefore, the inverter 1000 adopts liquid cooling to dissipate heat, which can not only improve the heat dissipation effect, but also reduce the size and volume of the inverter 1000 and reduce the manufacturing cost compared with air cooling and other methods.

[0093] The isolation plate assembly is supported on the liquid cooling plate 60, and the isolation plate assembly is fixedly connected to the liquid cooling plate 60. For example, one isolation plate in the isolation plate body 30 is connected to the liquid cooling plate 60, and multiple isolation plates are connected to each other, thereby achieving fixation of the isolation plate assembly in the outer shell 10, making the installation of the isolation plate assembly more convenient.

[0094] In addition, when the isolation plate assembly is installed in the housing 10, the side edge of the isolation plate body 30 can abut against the inner wall surface of the housing 10, or can be sealed with a seal, wherein the seal includes a rubber pad, a sponge pad, a sealant, etc. This can improve the sealing of the installation cavity 101 and reduce the impact of the harsh environment of the installation site on the circuit assembly 50.

[0095] like Figure 6 As shown, in some embodiments, the circuit component 50 includes an electrical component 51, the electrical component 51 has a first side and a second side arranged relatively to each other, the first side of the electrical component 51 has a fixing member 511 suitable for being fixed in the outer shell 10, and a thermal conductive pad 70 is provided between the second side of the electrical component 51 and the inner wall surface of the outer shell 10.

[0096] like Figure 6 As shown, the electrical component 51 can be a capacitor, and the first side and the second side of the electrical component 51 are arranged relatively along the third direction F3. The housing 10 has an installation position, and the electrical component 51 can be plugged into the installation position along the third direction F3. The first side of the electrical component 51 has a fixing member 511, and the housing 10 also has a connecting member. The fixing member 511 is connected with the connecting member in cooperation. For example, the fixing member 511 and the connecting member respectively have holes, and the fastener 80 is used to penetrate the corresponding holes for connection; or the fixing member 511 and the connecting member are connected by a card slot and a convex card. After the fixing member 511 and the connecting key are matched in place, the second side of the electrical component 51 is arranged at an interval with the inner wall surface of the housing 10.

[0097] At this time, when the electrical component 51 is installed, if the electrical component 51 moves too much along the third direction F3, the fixing part 511 will be misaligned with the connecting part, affecting the coordination between the fixing part 511 and the connecting part. Therefore, a thermal pad 70 is arranged between the second side of the electrical component 51 and the inner wall surface of the outer shell 10. On the one hand, the thermal pad 70 can limit the installation of the electrical component 51, thereby avoiding the problem of difficulty in fixing due to excessive movement of the electrical component 51, and improving the installation accuracy of the electrical component 51. On the other hand, the thermal pad 70 has a heat-conducting effect, and the thermal pad 70 can conduct the heat generated by the electrical component 51 during operation to the outer shell 10, thereby playing a heat dissipation role.

[0098] In some embodiments, the electrical components 51 include a plurality of electrical components 51 , and the thermal pad 70 includes a corresponding plurality of electrical components 51 , or the thermal pad 70 includes a single thermal pad 70 , and the single thermal pad 70 extends along the arrangement direction of the plurality of electrical components 51 .

[0099] In some examples, a plurality of thermal pads 70 are provided in the housing 10, and a plurality of electrical components 51 correspond one to one with the plurality of thermal pads 70. In this case, the plurality of thermal pads 70 can be first installed on the second side of the corresponding electrical component 51, and then installed into the housing 10 together with the electrical component 51. Of course, the plurality of thermal pads 70 can be first installed in the housing 10, and the position of each thermal pad 70 corresponds to the position of an electrical component 51, thereby achieving the limitation of the installation of the plurality of electrical components 51 and transferring the heat of the plurality of electrical components 51 to the housing 10. By adopting a plurality of thermal pads 70, it is convenient to effectively limit the plurality of electrical components 51.

[0100] In some examples, a thermal pad 70 is provided in the housing 10, and the thermal pad 70 extends along the arrangement direction of the multiple electrical components 51. The thermal pad 70 can be directly installed in the housing 10, thereby simultaneously limiting the installation of the multiple electrical components 51 and transferring the heat of the multiple electrical components 51 to the housing 10. By using a thermal pad 70, the number of parts can be reduced and the assembly efficiency can be improved.

[0101] In some embodiments, the thermal pad 70 is bonded to the outer shell 10, and the thermal pad 70 can be pre-installed in the outer shell 10, so that when the electrical component 51 is installed and the electrical component 51 abuts against the thermal pad 70, the fixing part 511 of the electrical component 51 can cooperate with the connecting part in the outer shell 10. The fixing method of the thermal pad 70 is simple, convenient and low-cost, and it is also convenient to limit the installation of the electrical component 51, thereby improving the assembly efficiency.

[0102] like Figure 1-Figure 6 As shown, in some embodiments, the inverter 1000 is a frequency converter, and the inverter divides the interior into an installation cavity 101 and a wiring cavity 102 through an isolation plate body 30. The wiring cavity 102 is opened by a second cover body 22 for wiring, and the external wiring area is isolated from the internal circuit component 50 installation area, thereby avoiding the risk of exposure of the internal circuit component 50 during installation operations to a certain extent, effectively reducing the impact of the harsh environment of the installation site on the internal circuit component 50 of the inverter 1000, and improving the reliability of the inverter.

[0103] The electric device 2000 according to the second embodiment of the present application includes the inverter 1000 according to the first embodiment of the present application. By adopting the inverter 1000, the risk of exposure of the internal circuit component 50 during installation is avoided to a certain extent, the impact of the harsh environment of the installation site on the circuit component 50 is effectively reduced, and the reliability is improved.

[0104] The power-consuming device 2000 disclosed in the embodiment of the present application may be, but is not limited to, a vehicle, a mobile phone, a tablet, a laptop computer, a ship, a spacecraft, an electric toy, an electric tool, etc. The vehicle may be a fuel vehicle, a gas vehicle, a new energy vehicle, or a rail vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle, etc.; the spacecraft includes an airplane, a rocket, a space shuttle, and a spacecraft, etc.; the electric toy includes a fixed or mobile electric toy, such as a game console, an electric vehicle toy, an electric ship toy, and an electric airplane toy, etc.; the electric tool includes a metal cutting electric tool, a grinding electric tool, an assembly electric tool, and a railway electric tool, such as an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact drill, a concrete vibrator, and an electric planer, etc.

[0105] In some embodiments, the electrical device 2000 is a ship.

[0106] Alternatively, if Figure 7 As shown, when the frequency converter 1000 is used in a ship, the frequency converter 1000 can be set at the bottom, or the head, or the tail of the ship.

[0107] The following describes a frequency converter according to a specific embodiment of the present application in conjunction with the accompanying drawings.

[0108] The frequency converter includes a housing 10 , a first cover 21 and a second cover 22 disposed on the housing 10 , and a circuit assembly 50 , an isolation plate assembly, and a liquid cooling plate 60 disposed in the housing 10 .

[0109] The isolation plate assembly includes an isolation plate body 30 and a wiring terminal 40. The isolation plate body 30 is roughly formed into a plate-like structure. The isolation plate body 30 is arranged in the housing 10 to divide the accommodating space into an installation cavity 101 and a wiring cavity 102. The circuit assembly 50 is installed in the installation cavity 101. The circuit assembly 50 includes an electrical component 51. The housing 10 has an installation position for the electrical component 51. The electrical component 51 can be plugged into the installation position along the third direction F3. The first side of the electrical component 51 has a fixing member 511. The housing 10 also has a connecting member. The fixing member 511 is connected with the connecting member in cooperation. A thermal pad 70 is provided between the second side of the electrical component 51 and the inner wall surface of the housing 10.

[0110] The thermal pad 70 can limit the installation of the electrical component 51, avoid the problem of excessive movement of the electrical component 51 causing difficulty in fixing, and improve the installation accuracy of the electrical component 51. On the other hand, the thermal pad 70 has a heat-conducting effect. The thermal pad 70 can conduct the heat generated by the electrical component 51 during operation to the outer casing 10 to play a heat dissipation role.

[0111] The liquid cooling plate 60 is disposed at the bottom of the housing 10 , and the isolation plate body 30 is supported on the liquid cooling plate 60 .

[0112] The isolation plate body 30 includes a first isolation plate 31, a second isolation plate 32 and a third isolation plate 33. The first isolation plate 31 is arranged above the second isolation plate 32. The upper part of the second isolation plate 32 has two first protrusions 321 protruding upward, and the lower part of the first isolation plate 31 has two first grooves 311. The first isolation plate 31 and the second isolation plate 32 are matched through the first protrusions 321 and the first grooves 311.

[0113] A portion of the first protrusion 321 is recessed downward to form an escape groove 34 . A mounting hole 35 is provided at the bottom of the escape groove 34 . A wiring terminal 40 is provided at the escape groove 34 , and the wiring terminal 40 is fixedly connected to the second isolation plate 32 via a fastener 80 .

[0114] The first protrusion 321 and the first groove 311 also have a mounting hole 35 for the fastener 80 to pass through so as to connect the first isolation plate 31 and the second isolation plate 32 .

[0115] The upper part of the second isolation plate 32 has a downwardly recessed mounting groove 322, and the mounting groove 322 is located between the two first protrusions 321. The bottom wall of the mounting groove 322 has a second groove 323 recessed in the direction away from the first isolation plate 31. The third isolation plate 33 is installed in the mounting groove 322 of the second isolation plate 32. The third isolation plate 33 has a second protrusion 331. The second groove 323 is plugged into the second protrusion 331, and a wiring terminal 40 is clamped between the second groove 323 and the second protrusion 331.

[0116] There is a mounting hole 35 between two adjacent second grooves 323 , and correspondingly, there is a mounting hole 35 between two adjacent second protrusions 331 . The third isolation plate 33 and the second isolation plate 32 can be fixedly connected by fasteners penetrating the corresponding mounting holes 35 .

[0117] The lower portion of the second isolation plate 32 abuts against the liquid cooling plate 60 , and the second isolation plate 32 further has a mounting hole 35 located outside the first protrusion 321 . The fastener 80 passes through the mounting hole 35 to fix the second isolation plate 32 to the liquid cooling plate 60 .

[0118] A plurality of isolation plates are assembled by adopting the above-mentioned arrangement, and the aforementioned fasteners can adopt the same size model, so that the connection and assembly of the isolation plate assembly is more convenient and the versatility of the parts is improved.

[0119] In addition, some small-sized fasteners 80 may be used to fix the connection terminal 40 disposed at the second groove 323 to the second isolation plate 32 to improve the stability of the connection terminal 40 .

[0120] Therefore, a part of the terminal block 40 is located in the installation cavity 101 , and a part of the terminal block 40 is located in the wiring cavity 102 . The isolation plate assembly can both isolate the installation cavity 101 and the wiring cavity 102 and solve the problem of fixing the terminal block 40 .

[0121] In addition, the isolation plate body 30 is provided with an escape hole 36 to facilitate the passage of the communication harness of the circuit assembly 50 .

[0122] The first cover body 21 is connected to the outer shell 10, and a wiring window is opened on the first cover body 21. The wiring window and the wiring cavity 102 are correspondingly connected to each other. The second cover body 22 is connected to the first cover body 21 to open and close the wiring cavity 102; the wiring cavity 102 is opened by the second cover body 22 for wiring, and the external wiring area is isolated from the internal circuit component 50 installation area, which to a certain extent avoids the risk of exposing the internal circuit component 50 during the installation operation, effectively reduces the impact of the harsh environment of the installation site on the circuit component 50, and improves reliability.

[0123] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A frequency converter, characterized in that: include: A housing defines a receiving space; An isolation plate assembly, the isolation plate assembly is arranged in the housing and comprises an isolation plate body and a wiring terminal, the isolation plate body is used to separate the accommodating space into an installation cavity and a wiring cavity, at least a portion of the wiring terminal is located in the installation cavity and at least a portion of the wiring terminal is located in the wiring cavity; A circuit assembly, the circuit assembly being installed in the installation cavity and connected to a portion of the wiring terminal located in the installation cavity; A first cover body and a second cover body, wherein the first cover body is disposed on the housing and is suitable for opening and closing the installation cavity, and the second cover body is disposed on the housing and is suitable for opening and closing the wiring cavity.

2. The frequency converter according to claim 1, characterized in that: The isolation plate body comprises at least two isolation plates, and the at least two isolation plates are arranged relative to each other in a direction perpendicular to the arrangement of the installation cavity and the wiring cavity, and the wiring terminal is clamped between the at least two isolation plates.

3. The frequency converter according to claim 2, characterized in that: One of the two adjacent isolation plates has a convex portion, and the other of the two adjacent isolation plates has a concave portion, and the convex portion is plug-fitted with the concave portion.

4. The frequency converter according to claim 3, characterized in that: The connection terminal is sandwiched between the protrusion and the corresponding groove.

5. The frequency converter according to claim 4, characterized in that: The convex part or the concave part is provided with an avoidance groove, and the connecting terminal is arranged in the avoidance groove; or, the protruding height of the convex part is smaller than the depressed depth of the concave part, and the connecting terminal is clamped between the convex part and the concave part.

6. The frequency converter according to claim 2, characterized in that: The isolation plate extends along a first direction, and the connection terminals include a plurality of connection terminals, which are arranged at intervals along the first direction.

7. The frequency converter according to any one of claims 2 to 6, characterized in that: The isolation plate body includes a first isolation plate, a second isolation plate and a third isolation plate. The first isolation plate and the second isolation plate are connected to each other, the third isolation plate is located between the first isolation plate and the second isolation plate, the third isolation plate is connected to at least one of the first isolation plate and the second isolation plate, at least one wiring terminal is provided between the first isolation plate and the second isolation plate, and at least one wiring terminal is provided between the third isolation plate and the first isolation plate and / or the second isolation plate.

8. The frequency converter according to claim 7, characterized in that: The first isolation plate has a first groove that is recessed toward the side away from the second isolation plate, the second isolation plate has a first convex portion that protrudes toward the side close to the first isolation plate, and an installation groove that is recessed toward the side away from the first isolation plate, the first convex portion is plugged into the first groove, and the third isolation plate is arranged in the installation groove.

9. The frequency converter according to claim 8, characterized in that: The first protrusion and the first groove have at least two mounting holes, one mounting hole is used to mount a terminal, and the other mounting hole is used to connect the first isolation plate and the second isolation plate.

10. The frequency converter according to claim 8, characterized in that: The first protrusions include two, and the mounting groove is arranged between the two first protrusions.

11. The frequency converter according to claim 8, characterized in that: The bottom wall of the installation groove has a second groove that is recessed in a direction away from the first isolation plate, and the third isolation plate has a second convex portion, and the second groove is plug-fitted with the second convex portion.

12. The frequency converter according to claim 11, characterized in that: The second grooves include multiple, the second protrusions include multiple, the multiple second protrusions correspond to the multiple second grooves one by one, and one of the wiring terminals is sandwiched between any corresponding second grooves and second protrusions. The second isolation plate has a mounting hole connected to the third isolation plate, and the mounting hole is located between two adjacent second grooves.

13. The frequency converter according to any one of claims 1-6 and 8-12, characterized in that: A liquid cooling plate is disposed in the housing, at least a portion of the liquid cooling plate is located in the installation cavity, and the isolation plate assembly is supported on the liquid cooling plate and fixedly connected to the liquid cooling plate.

14. The frequency converter according to claim 1, characterized in that: The circuit assembly includes an electrical component having a first side and a second side arranged opposite to each other, the first side of the electrical component having a fixing member suitable for fixing in the housing, and a thermal pad is provided between the second side of the electrical component and the inner wall surface of the housing.

15. The frequency converter according to claim 14, characterized in that: The electrical components include a plurality of them, the thermal conductive pads include a corresponding plurality of them, or the thermal conductive pads include one, and the one thermal conductive pad extends along the arrangement direction of the plurality of the electrical components.

16. The frequency converter according to claim 14, characterized in that: The thermal pad is bonded to the housing.

17. An electrical device, characterized in that: Comprising a frequency converter according to any one of claims 1-16.

18. The electrical device according to claim 17, characterized in that: The electrical device is a ship.

Images