Control panel, control panel assembly and frequency converter

Abstract

The utility model relates to the technical field of power control equipment, and provides a control panel, a control panel assembly and a frequency converter, the control panel is provided with a display operation area, a wiring area and an expansion area which are arranged along a first direction, and the wiring area is provided with wiring terminals arranged along a second direction. The expansion area is provided with a first connecting terminal used for being connected with an expansion module, and the first direction intersects with the second direction. Since the first direction and the second direction intersect (such as vertical intersection), the wiring terminals of the wiring area are arranged along the second direction, so that the space occupation of the wiring terminals in the first direction is reduced while the space in the second direction is fully utilized by the wiring terminals, and therefore, the display operation area and the wiring area are arranged on the control panel, and the display efficiency is improved. An expansion area can be additionally arranged to install an expansion module, and the problem that an existing control panel is not high in space utilization rate is solved.

Description

Technical Field

[0001] The present application relates to the technical field of power control equipment, and in particular to a control panel, a control panel assembly and a frequency converter. Background Art

[0002] In the current market application requirements, small size, high power density, multiple functions, and support for expansion modules have become the basic requirements for compact inverters, indirectly reflecting the demand for more compact product layout.

[0003] A frequency converter in the prior art is Figure 1 and Figure 2 As shown, the inverter 20 includes a housing 21 and a control panel 22 disposed within the housing 21. The control panel 22 has a display and operation area 221 and a wiring area 222. The wiring area 222 is provided with wiring terminals 2221. The arrangement of the control panel 22 increases the gaps between the wiring terminals 2221, greatly facilitating the customer's wiring operations.

[0004] However, many areas of the above-mentioned control panel are not fully utilized, resulting in low space utilization and non-compact space layout, which cannot adapt to users' wider and more diverse needs, such as communication expansion modules, resulting in a decline in product competitiveness. Utility Model Content

[0005] In view of this, embodiments of the present application provide a control board, a control board assembly, and an inverter to solve the problem of low space utilization of existing control boards.

[0006] The first aspect of the present application proposes a control panel, which is provided with a display operation area, a wiring area and an expansion area arranged along a first direction, the wiring area is provided with wiring terminals arranged along a second direction, and the expansion area is provided with a first connection terminal for connecting to an expansion module, wherein the first direction intersects with the second direction.

[0007] The control panel provided by the embodiments of the present application has the following beneficial effects: because the first direction intersects with the second direction (e.g., perpendicularly), by arranging the wiring terminals in the wiring area along the second direction, the wiring terminals fully utilize the space in the second direction while reducing the space occupied by the wiring terminals in the first direction, thereby improving space utilization. Therefore, while the display operation area and wiring area are provided on the control panel, an expansion area can be added to accommodate expansion modules, making the layout of the control panel more compact and resolving the problem of low space utilization in existing control panels.

[0008] The second aspect of the present application proposes a control board assembly, which includes a shell, an expansion module and the control board as described in the first aspect, wherein the control board is mounted on the shell, the expansion module includes a second connecting terminal, and the expansion module is mounted on the shell and arranged corresponding to the expansion area of ​​the control board so that the second connecting terminal is connected to the first connecting terminal of the expansion area.

[0009] The beneficial effect of the control panel assembly provided in the embodiment of the present application is: since the control panel assembly adopts the above-mentioned control panel, it has the beneficial effect of the above-mentioned control panel, so that the expansion module can be installed on the control panel and transmit signals with the control panel to meet the user's wider and more diverse needs.

[0010] In some embodiments, the expansion module includes an expansion shell and an expansion board disposed in the expansion shell, the second connection terminal is disposed on the expansion board, and the expansion shell is snap-fastened and fixed to the housing.

[0011] The beneficial effects of adopting the above technical solution are: the expansion board is arranged in the expansion shell, and the expansion shell can protect the expansion board and the components on the expansion board; the expansion module is fixed to the shell through the expansion shell, making the installation of the expansion module more convenient.

[0012] In some embodiments, a fixed hook is provided on the shell, and an elastic arm is provided on the expansion shell. The first end of the elastic arm is provided with a clamping portion for engaging with the fixed hook, and the second end of the elastic arm is provided with a pressing portion for unlocking the clamping portion. The middle position of the elastic arm is connected to the expansion shell.

[0013] The above technical solution has the following advantages: during installation, simply press the expansion module against the housing, and the latching portion engages with the fixed hook to secure the expansion module to the housing. During removal, simply press the pressing portion to disengage the latching portion from the fixed hook, unlocking the module and allowing it to be removed from the housing. As can be seen from the above, both installation and removal of the expansion module are convenient, which improves the user experience.

[0014] In some embodiments, a guide groove is provided on one of the expansion shell and the shell, and a guide column is provided on the other of the expansion shell and the shell for guiding and cooperating with the guide groove.

[0015] The beneficial effect of adopting the above technical solution is that the first connection terminal on the control board and the second connection terminal on the expansion board are precisely aligned and connected through the cooperation of the guide groove and the guide column.

[0016] In some embodiments, the expansion board is snap-fitted and fixed in the expansion shell.

[0017] The beneficial effect of adopting the above technical solution is that after the expansion board is placed in the expansion shell, the expansion board can be fixed in the expansion shell by simply pressing the expansion board, making it easier to install the expansion board in the expansion shell.

[0018] In some embodiments, a fixed buckle and an elastic buckle are provided in the expansion shell, and the fixed buckle and the elastic buckle are respectively arranged corresponding to the opposite ends of the expansion board.

[0019] The above technical solution has the following advantages: during installation, the first end of the expansion board is first inserted diagonally under the fixing clip, and then the second end of the expansion board is pressed downward to install the expansion board into the expansion case. During removal, the second end of the expansion board is unlocked by moving the elastic clip away from the expansion board. The second end of the expansion board is first moved upward, and then the expansion board is pulled diagonally to remove it from the expansion case. As can be seen from the above, both installation and removal of the expansion board are relatively convenient.

[0020] In some embodiments, the expansion shell is provided with grooves on both sides of the elastic buckle in the width direction of the elastic buckle.

[0021] The beneficial effect of adopting the above technical solution is that by providing grooves on both sides of the elastic buckle, the elastic buckle is more easily elastically deformed, which further facilitates the disassembly and assembly of the expansion board.

[0022] In some embodiments, a connecting column is provided on the control board, and a threaded hole is provided on the connecting column; a first through-hole is provided on the shell, a second through-hole is provided on the expansion shell, and a grounding through-hole is provided on the expansion board; the control board assembly also includes a grounding screw, which passes through the second through-hole, the grounding through-hole, and the first through-hole in sequence and is screwed into the threaded hole, and the grounding screw is electrically connected to the expansion board to achieve grounding of the expansion board.

[0023] The beneficial effect of adopting the above technical solution is that the grounding screw can not only realize the grounding of the expansion board, but also ensure the stability of the expansion module fixed on the shell, thereby improving the strength requirement of the external interface connection of the expansion module.

[0024] A third aspect of the present application provides a frequency converter, which includes the control board assembly as described in the second aspect.

[0025] The frequency converter adopts any one or more embodiments of the above-mentioned control board assembly, and thus has the beneficial effects of the above-mentioned embodiments, which will not be described in detail here.

[0026] 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

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or conventional technical descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0028] Figure 1 It is a structural diagram of a frequency converter in the prior art of this application;

[0029] Figure 2 yes Figure 1 The schematic diagram of the structure of the control board of the frequency converter shown;

[0030] Figure 3 is an exploded view of a control panel assembly provided in some embodiments of the present application;

[0031] Figure 4 yes Figure 3 Schematic diagram of the structure of the control panel;

[0032] Figure 5 yes Figure 3 Schematic diagram of the structure in which the control panel and the housing are assembled together;

[0033] Figure 6 yes Figure 3 Schematic diagram of the structure of the expansion module;

[0034] Figure 7 yes Figure 3 Schematic diagram of the structure of the expansion module and the shell;

[0035] Figure 8 yes Figure 7 A cross-sectional view taken along the AA axis showing the expansion module installed on the housing;

[0036] Figure 9 yes Figure 8 Enlarged view of point B in the middle.

[0037] The meanings of the marks in the figure are:

[0038] 10. Control panel assembly;

[0039] 11. Control panel; 111. Display operation area; 1111. Display screen; 1112. Operation buttons; 112. Wiring area; 1121. Wiring terminal; 1122. Network port; 113. Expansion area; 1131. First connection terminal; 1132. Connection column; 11321. Threaded hole;

[0040] 12. Housing; 121. Fixing hook; 122. Guide column; 123. First through-hole;

[0041] 13. Expansion module; 131. Expansion shell; 1311. Elastic arm; 13111. Clamping portion; 13112. Pressing portion; 1312. Guide groove; 1313. Fixing buckle; 1314. Elastic buckle; 1315. Groove; 1316. Second through-hole; 132. Expansion board; 1321. Second connection terminal; 1322. Ground via;

[0042] 14. Ground screw;

[0043] 20. Frequency converter;

[0044] 21. Housing;

[0045] 22. Control panel; 221. Display and operation area; 222. Wiring area; 2221. Wiring terminals. DETAILED DESCRIPTION

[0046] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0047] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0048] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0049] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0050] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0051] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0052] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the embodiments of the present application.

[0053] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0054] The embodiment of the first aspect of the present application provides a control panel. Figure 3 and Figure 4 The control board 11 is provided with a display operation area 111, a wiring area 112 and an expansion area 113 arranged along a first direction X. The wiring area 112 is provided with a wiring terminal 1121 arranged along a second direction Y. The expansion area 113 is provided with a first connection terminal 1131 for connecting to the expansion module 13, wherein the first direction X intersects with the second direction Y.

[0055] It can be understood that the display operation area 111, the wiring area 112 and the expansion area 113 can be arranged in sequence along the first direction X on the control board 11, that is, the wiring area 112 is located between the display operation area 111 and the expansion area 113; or, the display operation area 111, the expansion area 113 and the wiring area 112 can be arranged in sequence along the first direction X on the control board 11, that is, the expansion area 113 is located between the display operation area 111 and the wiring area 112.

[0056] The display operation area 111 is an important location for human-computer information exchange. The display operation area 111 includes a display screen 1111 and operation buttons 1112. The display screen 1111 is used to display operating parameters, fault information, parameter settings, etc., wherein the display screen 1111 can be an LED screen, an LCD screen, etc.; the operation buttons 1112 are used to start, stop, adjust speed, adjust direction, etc.

[0057] Wiring area 112 is the junction point for motor control input and output signals. It includes wiring terminals 1121 and a network port 1122. Wiring terminals 1121 are arranged along the second direction Y to fully utilize the space in the second direction Y, thereby reducing the space occupied by wiring terminals 1121 in the first direction X. Control board 11 connects to a network cable via network port 1122 to achieve wired communication. Alternatively, wiring area 112 may be provided without network port 1122, and a wireless module may be provided on control board 11 to achieve wireless communication.

[0058] The expansion area 113 is provided with a first connection terminal 1131, which connects to the expansion module 13 to enable signal reception and transmission. It is understood that the first connection terminal 1131 can be a pin terminal, in which case the expansion module 13 includes a socket terminal connected to the pin terminal; alternatively, the first connection terminal 1131 can be a socket terminal, in which case the expansion module 13 includes a pin terminal connected to the socket terminal.

[0059] The expansion area 113 also supports the arrangement of other hardware components and can support the addition of various types of functional requirements.

[0060] Optionally, the first direction X and the second direction Y intersect perpendicularly or approximately perpendicularly.

[0061] The control panel 11 provided in the embodiment of the present application has the following beneficial effects: because the first direction X intersects (e.g., intersects perpendicularly) with the second direction Y, by arranging the connection terminals 1121 of the connection area 112 along the second direction Y, the connection terminals 1121 fully utilize the space in the second direction Y while reducing the space occupied by the connection terminals 1121 in the first direction X, thereby improving space utilization. Therefore, while the display operation area 111 and the connection area 112 are provided on the control panel 11, an expansion area 113 can be added to accommodate the expansion module 13, making the layout of the control panel 11 more compact and solving the problem of low space utilization of the existing control panel 11.

[0062] The second aspect of the present application proposes a control panel assembly 10, please refer to Figure 3 、 Figure 4 and Figure 6 The control board assembly 10 includes a shell 12, an expansion module 13 and the control board 11 as described in the first aspect, the control board 11 is installed on the shell 12, the expansion module 13 includes a second connection terminal 1321, the expansion module 13 is installed on the shell 12 and is arranged corresponding to the expansion area 113 of the control board 11, so that the second connection terminal 1321 is connected to the first connection terminal 1131 of the expansion area 113.

[0063] It is understood that the housing 12 can be part of the inverter housing; alternatively, the housing 12 can be independent of the inverter housing and mounted on the inverter housing. The housing 12 is made of an injection mold and is used to protect the control board 11 and the components on the control board 11.

[0064] The control board 11 is installed inside one side of the housing 12. The housing 12 is provided with a plurality of openings for exposing components such as the display screen 1111, the wiring terminals 1121 and the first connecting terminals 1131 on the control board 11.

[0065] The expansion module 13 is installed on the other side of the housing 12 , that is, the control board 11 and the expansion module 13 are located on opposite sides of the housing 12 .

[0066] The expansion module 13 is arranged corresponding to the expansion area 113 on the control board 11 so that the second connection terminal 1321 of the expansion module 13 is connected to the first connection terminal 1131 of the control board 11, thereby realizing signal transmission between the expansion module 13 and the control board 11.

[0067] The second connection terminal 1321 and the first connection terminal 1131 are plug-connected. For example, the first connection terminal 1131 is a pin terminal, and the second connection terminal 1321 is a socket terminal connected to the pin terminal; or the first connection terminal 1131 is a socket terminal, and the second connection terminal 1321 is a pin terminal connected to the socket terminal. Of course, the second connection terminal 1321 and the first connection terminal 1131 can also be connected in abutment.

[0068] The beneficial effect of the control panel assembly 10 provided in the embodiment of the present application is: since the control panel assembly 10 adopts the above-mentioned control panel 11, it has the beneficial effect of the above-mentioned control panel 11, so that the expansion module 13 can be installed on the shell 12 and transmit signals with the control panel 11 to adapt to the user's wider and more diverse needs.

[0069] Please also refer to Figure 6 and Figure 7 In some embodiments, the expansion module 13 includes an expansion shell 131 and an expansion board 132 disposed in the expansion shell 131 , the second connection terminal 1321 is disposed on the expansion board 132 , and the expansion shell 131 is snap-fitted and fixed to the housing 12 .

[0070] Optionally, the expansion shell 131 is made of a plastic mold.

[0071] The expansion board 132 is a PCBA circuit board that implements communication functions and can be customized according to user functional requirements.

[0072] By placing the expansion board 132 in the expansion shell 131 , the expansion shell 131 can protect the expansion board 132 and the components on the expansion board 132 ; the expansion module 13 is fixed to the housing 12 by snapping the expansion shell 131 , making the installation of the expansion module 13 more convenient.

[0073] In other embodiments, the expansion shell 131 may be fixed to the housing 12 by threaded fasteners. For example, the threaded fasteners may be fastening screws, fastening bolts, and the like.

[0074] Please also refer to Figure 8 and Figure 9 In some embodiments, a fixed hook 121 is provided on the shell 12, and an elastic arm 1311 is provided on the extension shell 131. The first end of the elastic arm 1311 is provided with a clamping portion 13111 for clamping with the fixed hook 121, and the second end of the elastic arm 1311 is provided with a pressing portion 13112 for unlocking the clamping portion 13111. The middle position of the elastic arm 1311 is connected to the extension shell 131.

[0075] Optionally, the engaging surface between the engaging portion 13111 and the fixed hook 121 is a plane, and the sides of the engaging portion 13111 and the fixed hook 121 facing away from the engaging surface are both guiding slopes to facilitate the engaging connection between the engaging portion 13111 and the fixed hook 121.

[0076] The engaging portion 13111 and the pressing portion 13112 are located on opposite sides of the elastic arm 1311 in the thickness direction of the elastic arm 1311 (ie, the second direction Y).

[0077] It should be noted that the middle position of the elastic arm 1311 refers to the position between the clamping portion 13111 and the pressing portion 13112 , that is, the elastic arm 1311 is similar to a seesaw structure.

[0078] Optionally, the housing 12 is provided with multiple fixed hooks 121, and correspondingly, the expansion housing 131 is provided with multiple elastic arms 1311, with the multiple fixed hooks 121 being arranged in a one-to-one correspondence with the multiple elastic arms 1311. For example, when there are two fixed hooks 121 and two elastic arms 1311, the two fixed hooks 121 are respectively provided on opposite sides of the housing 12, and the two elastic arms 1311 are respectively provided on opposite sides of the expansion housing 131.

[0079] During installation, simply press the expansion module 13 against the housing 12 along the third direction Z. The engaging portion 13111 engages with the fixed hook 121, securing the expansion module 13 to the housing 12. During removal, simply press the pressing portion 13112 to disengage the engaging portion 13111 from the fixed hook 121, unlocking the expansion module 13 and allowing it to be removed from the housing 12. As can be seen from the above, both installation and removal of the expansion module 13 are convenient, enhancing the user experience. The third direction Z is perpendicular to both the first direction X and the second direction Y.

[0080] In other embodiments, the pressing portion 13112 may not be provided on the elastic arm 1311 , and only serves to facilitate the installation of the extension module 13 .

[0081] Please refer to Figure 6 and Figure 7 In some embodiments, a guide groove 1312 is provided on one of the expansion shell 131 and the housing 12 , and a guide column 122 that cooperates with the guide groove 1312 is provided on the other of the expansion shell 131 and the housing 12 .

[0082] Optionally, a plurality of guide slots 1312 are provided, and correspondingly, a plurality of guide posts 122 are provided, with the plurality of guide slots 1312 being arranged in a one-to-one correspondence with the plurality of guide posts 122. For example, three guide slots 1312 are provided, two of which are located on opposite sides of the expansion shell 131 in the second direction Y, and the other guide slot 1312 is located on one side of the expansion shell 131 in the first direction X; correspondingly, three guide posts 122 are provided.

[0083] Optionally, the guide groove 1312 is formed by a depression in a side wall of the expansion shell 131 .

[0084] The guide groove 1312 cooperates with the guide column 122 to achieve precise alignment and connection between the first connection terminal 1131 on the control board 11 and the second connection terminal 1321 on the expansion board 132; at the same time, in conjunction with the elastic arm 1311 on the expansion shell 131, the expansion module 13 can be plug-and-play.

[0085] In other embodiments, a guide groove 1312 may be provided on the housing 12 , and a guide post 122 may be provided on the expansion shell 131 to cooperate with the guide groove 1312 .

[0086] In other embodiments, a guide hole may be provided on one of the expansion shell 131 and the housing 12 , and a guide post 122 for guiding and cooperating with the guide hole may be provided on the other one of the expansion shell 131 and the housing 12 .

[0087] Please refer to Figure 6 In some embodiments, the expansion board 132 is snap-fitted and fixed in the expansion shell 131 .

[0088] By adopting the above technical solution, after the expansion board 132 is placed in the expansion shell 131 , the expansion board 132 can be fixed in the expansion shell 131 by simply pressing the expansion board 132 , making it easier to install the expansion board 132 in the expansion shell 131 .

[0089] In other embodiments, the expansion plate 132 may be fixed in the expansion shell 131 by threaded fasteners. For example, the threaded fasteners may be fastening screws, fastening bolts, and the like.

[0090] In some embodiments, a fixed buckle 1313 and an elastic buckle 1314 are provided in the expansion shell 131 , and the fixed buckle 1313 and the elastic buckle 1314 are respectively arranged corresponding to the opposite ends of the expansion plate 132 .

[0091] Please refer to Figure 6 The expansion plate 132 has a first end and a second end in the first direction X, the fixing buckle 1313 is arranged corresponding to the first end of the expansion plate 132, and the elastic buckle 1314 is arranged corresponding to the second end of the expansion plate 132.

[0092] Optionally, there are multiple fixing buckles 1313, and correspondingly, there are multiple elastic buckles 1314, and the fixing buckles 1313 are arranged in a one-to-one correspondence with the elastic buckles 1314. For example, there are two fixing buckles 1313 and two elastic buckles 1314.

[0093] During installation, the first end of the expansion board 132 is first inserted obliquely under the fixing clip 1313, and then the second end of the expansion board 132 is pressed downward to install the expansion board 132 in the expansion shell 131. During removal, the second end of the expansion board 132 is unlocked by moving the elastic clip 1313 away from the expansion board 132. The second end of the expansion board 132 is first moved upward, and then the expansion board 132 is pulled obliquely to remove the expansion board 132 from the expansion shell 131. As can be seen from the above, both installation and removal of the expansion board 132 are relatively convenient.

[0094] In other embodiments, the expansion shell 131 may include only fixing buckles 1313 or fixing buckles 1314 .

[0095] Please refer to Figure 6 In some embodiments, the expansion shell 131 is provided with grooves 1315 on both sides of the elastic buckle 1314 in the width direction of the elastic buckle 1314.

[0096] The depth of the groove 1315 can be designed according to the height of the elastic buckle 1314 .

[0097] By providing grooves 1315 on both sides of the elastic buckle 1314 , the elastic buckle 1314 can be more easily elastically deformed, which further facilitates the assembly and disassembly of the expansion plate 132 .

[0098] In other embodiments, the groove 1315 may be provided on only one side of the elastic buckle 1314 ; or, the groove 1315 may not be provided, but the thickness of the expansion shell 131 on both sides of the elastic buckle 1314 may be made thinner to facilitate elastic deformation of the elastic buckle 1314 .

[0099] Please also refer to Figures 3 to 6 In some embodiments, a connecting column 1132 is provided on the control board 11, and a threaded hole 11321 is provided on the connecting column 1132; a first through-hole 123 is provided on the shell 12, a second through-hole 1316 is provided on the expansion shell 131, and a grounding through-hole 1322 is provided on the expansion board 132; the control board assembly 10 also includes a grounding screw 14, which passes through the second through-hole 1316, the grounding through-hole 1322, and the first through-hole 123 in sequence and is screwed into the threaded hole 11321. The grounding screw 14 is electrically connected to the expansion board 132 to achieve grounding of the expansion board 132.

[0100] Optionally, the connecting pillar 1132 is a conductive pillar, for example, a copper pillar, an aluminum pillar, etc.

[0101] The diameter of the first through hole 123 is larger than the diameter of the shaft of the grounding screw 14 so that the grounding screw 14 can be smoothly inserted.

[0102] The second through hole 1316 is a countersunk structure to prevent the head of the grounding screw 14 from being exposed.

[0103] The grounding via 1322 is a metalized hole, that is, a grounding copper layer is provided on the hole wall. When the grounding screw 14 passes through the grounding via 1322 , the grounding copper layer is connected to the grounding screw 14 to achieve grounding of the expansion board 132 .

[0104] By adopting the above technical solution, the grounding screw 14 can not only achieve the grounding of the expansion board 132, but also ensure the stability of the expansion module 13 fixed on the shell 12, thereby improving the strength requirement of the external interface connection of the expansion module 13.

[0105] The third aspect of the present application provides a frequency converter, which includes the control board assembly 10 as described in the second aspect.

[0106] The frequency converter adopts any one or more embodiments of the control board assembly 10 described above, and thus has the beneficial effects of the above embodiments, which will not be described in detail here.

[0107] 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 make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included in the scope of protection of the present application.

Claims

1. A control panel, characterized in that: The control panel is provided with a display operation area, a wiring area and an expansion area arranged along a first direction, the wiring area is provided with wiring terminals arranged along a second direction, and the expansion area is provided with a first connection terminal for connecting to an expansion module, wherein the first direction intersects with the second direction.

2. A control panel assembly, characterized in that: The invention comprises a shell, an expansion module and a control board as claimed in claim 1, wherein the control board is mounted on the shell, the expansion module comprises a second connection terminal, the expansion module is mounted on the shell and arranged corresponding to the expansion area of ​​the control board so that the second connection terminal is connected to the first connection terminal of the expansion area.

3. The control panel assembly according to claim 2, wherein: The expansion module includes an expansion shell and an expansion board arranged in the expansion shell, the second connecting terminal is arranged on the expansion board, and the expansion shell is clamped and fixed on the housing.

4. The control panel assembly according to claim 3, wherein: The shell is provided with a fixed hook, the expansion shell is provided with an elastic arm, the first end of the elastic arm is provided with a clamping portion for engaging with the fixed hook, the second end of the elastic arm is provided with a pressing portion for unlocking the clamping portion, and the middle position of the elastic arm is connected to the expansion shell.

5. The control panel assembly according to claim 3, wherein: One of the expansion shell and the shell is provided with a guide groove, and the other of the expansion shell and the shell is provided with a guide column that cooperates with the guide groove for guidance.

6. The control panel assembly according to any one of claims 3 to 5, characterized in that: The expansion board is clamped and fixed in the expansion shell.

7. The control panel assembly according to claim 6, wherein: A fixing buckle and an elastic buckle are provided in the expansion shell, and the fixing buckle and the elastic buckle are respectively arranged corresponding to the opposite ends of the expansion board.

8. The control panel assembly according to claim 7, wherein: The expansion shell is provided with grooves on both sides of the elastic buckle in the width direction of the elastic buckle.

9. The control panel assembly according to any one of claims 3 to 5, characterized in that: The control board is provided with a connecting column, and the connecting column is provided with a threaded hole; the shell is provided with a first through-hole, the expansion shell is provided with a second through-hole, and the expansion board is provided with a grounding through-hole; the control board assembly also includes a grounding screw, which passes through the second through-hole, the grounding through-hole, and the first through-hole in sequence and is screwed into the threaded hole. The grounding screw is electrically connected to the expansion board to achieve grounding of the expansion board.

10. A frequency converter, characterized in that: The device comprises a control panel assembly according to any one of claims 2 to 9.

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