Frequency converter

Abstract

The utility model belongs to the technical field of power control equipment, and discloses a frequency converter. The frequency converter comprises an inner shell, an outer shell, a power panel assembly and a control panel assembly. The inner shell comprises a first side plate and a second side plate, the outer shell covers the outer side of the inner shell, a first accommodating space is formed between the outer shell and the first side plate, a second accommodating space is formed between the outer shell and the second side plate, and the first accommodating space is communicated with the second accommodating space; the control panel assembly is electrically connected to the power panel assembly, the power panel assembly is arranged in the first containing space, and the control panel assembly is arranged in the second containing space. According to the frequency converter, the space between the outer shell and the inner shell can be reasonably and effectively distributed, so that the structure compactness and the small occupied area of the frequency converter can be ensured.

Description

Technical Field

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

[0002] The inverter is an electric power control device that applies frequency conversion technology and microelectronics technology to control AC motors by changing the frequency of the motor's operating power supply. Currently, during the assembly process of the inverter, due to the unreasonable assembly method and the irrational allocation of the usable space within the inverter housing, the structural dimensions of the assembled inverter are easily larger, resulting in a larger occupied area of ​​the entire inverter.

[0003] Therefore, there is an urgent need for a frequency converter to solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to provide a frequency converter, which can reasonably and effectively allocate the space between the outer shell and the inner shell, so as to ensure the compactness of the frequency converter structure and a small occupied area.

[0005] To achieve this purpose, the present invention adopts the following technical solutions:

[0006] Frequency converter, including:

[0007] An inner shell and an outer shell, wherein the inner shell includes a first side plate and a second side plate, and the outer shell is disposed on the outer side of the inner shell, a first accommodating space is formed between the outer shell and the first side plate, and a second accommodating space is formed between the outer shell and the second side plate, and the first accommodating space is communicated with the second accommodating space;

[0008] A power board assembly and a control board assembly, wherein the control board assembly is electrically connected to the power board assembly, the power board assembly is arranged in the first accommodating space, and the control board assembly is arranged in the second accommodating space.

[0009] As an optional solution, a accommodating cavity is provided on the side of the inner shell facing away from the first side panel, and a first mounting groove is provided on the top of the inner shell. The first mounting groove and the first accommodating space are respectively connected to the accommodating cavity. A radiator is provided in the accommodating cavity, and the radiator is in contact with the power board assembly. A fan is provided in the first mounting groove, and the fan is configured to discharge the hot air in the accommodating cavity to the external environment.

[0010] As an optional solution, a first avoidance opening matching the fan is provided on the top of the housing, the fan is directly opposite the first avoidance opening, and a detachable cover is provided at the first avoidance opening with a fan cover.

[0011] As an optional solution, a plurality of heat dissipation holes are provided on the fan cover, and an elastic hook is connected to one side of the fan cover, and the elastic hook is engaged with the housing.

[0012] As an optional solution, the first side panel includes a first sub-panel and a second sub-panel connected to each other, the first sub-panel and the second sub-panel are arranged in a stepped manner, and the first sub-panel is provided with a second avoidance opening connected to the accommodating cavity in the inner shell; the power board assembly includes:

[0013] Power strip;

[0014] A power module is electrically connected to one side of the power board, and the power module contacts the heat sink in the accommodating cavity through the second avoidance opening.

[0015] As an optional solution, the first sub-board is further provided with a third avoidance opening communicating with the accommodating cavity, and the third avoidance opening is located below the second avoidance opening; the power board assembly further includes:

[0016] A rectifier module is electrically connected to the power board and is located on the same side as the power module, and the rectifier module is in contact with the radiator through the third avoidance opening.

[0017] As an optional solution, the second sub-board is provided with a protrusion, and the protrusion is provided with a receiving groove communicating with the receiving cavity; the power board assembly further includes:

[0018] A capacitor is electrically connected to the power board and is located on the same side as the power module. The capacitor is disposed in the receiving groove and contacts the heat sink.

[0019] As an optional solution, a fourth avoidance opening is provided on a side of the housing opposite to the second side panel, and an outer cover is provided at the fourth avoidance opening; the control panel assembly includes:

[0020] A control board electrically connected to the power board assembly, the control board being located in the second accommodation space and being attached to the second side panel;

[0021] The external terminal is electrically connected to the control board and is arranged corresponding to the fourth avoidance opening.

[0022] As an optional solution, the inner shell also includes a third side panel, which is arranged on the side of the inner shell away from the second side panel. A second mounting groove is provided at the lower part of the third side panel, and a guide rail clip is inserted into the second mounting groove. The guide rail clip is used to be clipped onto the guide rail.

[0023] As an optional solution, one of the inner shell and the outer shell is provided with a mounting buckle, and the other is provided with a slot, and the mounting buckle is snapped into the slot.

[0024] Beneficial effects:

[0025] The frequency converter proposed by the present invention, by arranging the outer shell cover on the outside of the inner shell, so that a first accommodating space for accommodating the power board assembly is formed between the first side plate of the outer shell and the inner shell, and a second accommodating space for accommodating the control board assembly is formed between the second side plate of the outer shell and the inner shell, so that the power board assembly and the control board assembly can be installed in the side space between the inner shell and the outer shell without occupying the upper usable space of the inner shell, so that the height dimension of the entire frequency converter is small, which is only the height dimension of the outer shell; and, since the first accommodating space and the second accommodating space between the inner shell and the outer shell are effectively and reasonably utilized to respectively set up and install the power board assembly and the control board assembly, the space is reasonably and effectively allocated, and therefore the width and length dimensions of the frequency converter are not increased; thereby making the structure of the entire frequency converter more compact, and thus being able to ensure that the frequency converter is small in size and occupies a small area. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the exploded structure of the frequency converter provided in the present utility model;

[0027] Figure 2 This is a schematic structural diagram of the inner shell provided in the present utility model at one viewing angle;

[0028] Figure 3 This is a schematic structural diagram of the inner shell provided in the present invention from another perspective;

[0029] Figure 4 It is a schematic structural diagram of the housing provided in the present utility model at one viewing angle;

[0030] Figure 5 This is a schematic structural diagram of the housing provided in the present invention from another perspective;

[0031] Figure 6 It is a structural schematic diagram of the fan cover provided in the utility model;

[0032] Figure 7 It is a structural schematic diagram of the outer cover provided in the utility model;

[0033] Figure 8 It is a structural schematic diagram of the guide rail buckle provided in the utility model.

[0034] In the picture:

[0035] 1. Inner shell; 11. First side panel; 111. First split panel; 1111. Second avoidance opening; 1112. Third avoidance opening; 112. Second split panel; 1121. Protrusion; 1122. Accommodation slot; 12. Second side panel; 13. Third side panel; 131. Second mounting slot; 14. First mounting slot; 15. Accommodation cavity; 16. Mounting buckle;

[0036] 2. Housing; 21. First avoidance opening; 22. Fan cover; 221. Heat dissipation hole; 222. Elastic hook; 23. Fourth avoidance opening; 24. Outer cover; 25. Slot;

[0037] 31. Power board; 32. Power module; 33. Capacitor; 34. Rectifier module;

[0038] 41. Control board; 42. External terminals;

[0039] 5. Radiator; 6. Fan; 8. Guide rail clip. DETAILED DESCRIPTION

[0040] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0041] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0042] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0043] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are used to refer to positions or locations based on the positions or locations shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0044] In this embodiment, a frequency converter is proposed, which has a compact structure, a small volume and occupied area, and a low cost. The main improvement in this embodiment lies in the layout and assembly of the various components in the frequency converter. Here, the working principle of the frequency converter can refer to the working principle of the frequency converter in the prior art, and the working principle of the frequency converter will not be described in detail here.

[0045] Specifically, if Figures 1 to 5 As shown, the inverter includes an inner shell 1, an outer shell 2, a power board assembly and a control board assembly; wherein, the inner shell 1 includes a first side plate 11 and a second side plate 12, the outer shell 2 is covered on the outside of the inner shell 1, a first accommodating space is formed between the outer shell 2 and the first side plate 11, and a second accommodating space is formed between the outer shell 2 and the second side plate 12, and the first accommodating space is connected to the second accommodating space; the control board assembly is perpendicular to and electrically connected to one side of the power board assembly, the power board assembly is arranged in the first accommodating space, and the control board assembly is arranged in the second accommodating space.

[0046] Compared with the prior art, the inverter in this embodiment changes the layout position of the power board assembly and the control board assembly in the inverter; by covering the outer shell 2 on the outside of the inner shell 1, a first accommodating space for accommodating the power board assembly is formed between the outer shell 2 and the first side plate 11 of the inner shell 1, and a second accommodating space for accommodating the control board assembly is formed between the outer shell 2 and the second side plate 12 of the inner shell 1, so that the power board assembly and the control board assembly can be installed in the side space between the inner shell 1 and the outer shell 2 without occupying the upper usable space of the inner shell 1, so that the height dimension of the entire inverter is small, only the height dimension of the outer shell 2; and, since the first accommodating space and the second accommodating space between the inner shell 1 and the outer shell 2 are effectively and reasonably utilized to respectively set up and install the power board assembly and the control board assembly, the usable space is reasonably allocated, and therefore the width and length dimensions of the inverter are not increased; thereby making the structure of the entire inverter more compact, thereby ensuring that the inverter is small in size and occupies a small area.

[0047] Furthermore, if Figures 1 to 3As shown, a receiving cavity 15 is provided on the side of the inner shell 1 facing away from the first side plate 11, and a first mounting groove 14 is provided on the top of the inner shell 1, that is, the first mounting groove 14 is located above the receiving cavity 15, and the first mounting groove 14 and the first receiving space are respectively connected to the receiving cavity 15; and a heat sink 5 is provided in the receiving cavity 15, and the heat sink 5 is in contact with the power board assembly so that the power board assembly can be cooled by the heat sink 5; a fan 6 is installed in the first mounting groove 14, and the fan 6 is configured to discharge the hot air in the receiving cavity 15 to the external environment, that is, the heat of the radiator 5 can be taken away by the fan 6 to achieve heat dissipation of the radiator 5, thereby ensuring that the heat sink 5 has a better heat dissipation effect on the power board assembly. In this embodiment, the radiator 5 can be specifically an aluminum extruded radiator with a square structure, and the fan 6 can be specifically a DC fan.

[0048] By locating the power board assembly on one side of the radiator 5 and arranging the fan 6 above the radiator 5, upper heat dissipation can be achieved, thereby ensuring the heat dissipation effect of the power board assembly; and the position layout of the radiator 5, the fan 6, and the power board assembly relative to each other can be made more reasonable, further ensuring the compact structure of the inverter and a small occupied area.

[0049] Furthermore, if Figure 1 、 Figure 4 and Figure 5 As shown, a first avoidance opening 21 matching the fan 6 is provided at the top of the outer shell 2. When the outer shell 2 is covered on the outside of the inner shell 1, the fan 6 is opposite the first avoidance opening 21, and a detachable cover is provided at the first avoidance opening 21 so that the fan cover 22 can be protected by the fan cover 22, and the fan cover 22 will not affect the air inlet and outlet of the fan 6.

[0050] Specifically, if Figure 6 As shown, the fan cover 22 is provided with a plurality of heat dissipation holes 221 to ensure the air inlet and outlet of the fan 6 through each heat dissipation hole 221. In addition, an elastic hook 222 is connected to one side of the fan cover 22. The elastic hook 222 is engaged with the housing 2 to achieve a detachable connection between the fan cover 22 and the housing 2 through the elastic hook 222. The fan cover 22 and the elastic hook 222 are an integrally formed structure.

[0051] Furthermore, if Figures 1 to 3As shown, the first side panel 11 includes a first sub-panel 111 and a second sub-panel 112 connected to each other. The first sub-panel 111 and the second sub-panel 112 are arranged in a stepped manner. The first sub-panel 111 is provided with a second avoidance opening 1111 that communicates with the accommodating cavity 15. Furthermore, the power board assembly includes a power board 31 and a power module 32. The power module 32 is electrically connected to the side of the power board 31 where the control board assembly is provided. The power module 32 contacts the heat sink 5 through the second avoidance opening 1111, allowing the heat sink 5 to dissipate heat from the power module 32. A temperature monitor is provided on the first sub-panel 111 to monitor the temperature of the heat sink 5 in real time and ensure optimal heat dissipation.

[0052] Specifically, if Figures 1 to 3 As shown, multiple second avoidance openings 1111 and multiple power modules 32 are provided. Each power module 32 contacts the heat sink 5 through a second avoidance opening 1111, allowing the heat sink 5 to contact each power module 32 simultaneously, ensuring a good heat dissipation effect for each power module 32. In this embodiment, seven second avoidance openings 1111 and seven power modules 32 are provided, and the seven second avoidance openings 1111 are arranged in an array on the first sub-plate 111.

[0053] Furthermore, if Figures 1 to 3 As shown, a third avoidance opening 1112 connected to the accommodating cavity 15 is also provided on the first sub-board 111, and the third avoidance opening 1112 is located below the second avoidance opening 1111; and the power board assembly also includes a rectifier module 34, which is electrically connected to one side of the power board 31 and is located on the same side as the power module 32, that is, the rectifier module 34 is located below each power module 32, and the rectifier module 34 is in contact with the radiator 5 through the third avoidance opening 1112, so that the radiator 5 can dissipate heat from the rectifier module 34.

[0054] By respectively providing a second avoidance opening 1111 and a third avoidance opening 1112 on the first sub-board 111, the power module 32 and the rectifier module 34 can be adaptively arranged according to the setting position of the radiator 5. This ensures that the radiator 5 has a heat dissipation effect on the power module 32 and the rectifier module 34 respectively. At the same time, the positional layout of the power board 31, the power module 32, and the rectifier module 34 relative to the first sub-board 111 can be made more reasonable, thereby better ensuring the compactness of the structure of the inverter and a small occupied area.

[0055] Furthermore, if Figures 1 to 3As shown, a protrusion 1121 is provided on the second sub-board 112, and a receiving groove 1122 connected to the receiving cavity 15 is provided on the protrusion 1121. The receiving groove 1122 is located on one side of the second avoidance opening 1111, and the end face of the protrusion 1121 is flush with the first sub-board 111; and the power board assembly also includes a capacitor 33, which is electrically connected to one side of the power board 31 and is located on the same side as the power module 32. The capacitor 33 is arranged in the receiving groove 1122 and contacts the heat sink 5, so that the capacitor 33 is accommodated in the first receiving space and can dissipate heat from the capacitor 33 through the heat sink 5.

[0056] The receiving groove 1122 is provided to accommodate the capacitor 33 on the power board 31, thereby avoiding interference between the capacitor 33 and the second sub-board 112; and saving the first receiving space, making the structure of the entire inverter more compact.

[0057] And, as Figures 1 to 3 As shown, by providing a first sub-board 111 and a second sub-board 112 connected in a stepped manner, and making the end surface of the protrusion 1121 flush with the first sub-board 111, after the power module 32, the rectifier module 34 and the capacitor 33 are installed, the power board 31 can be fitted between the first sub-board 111, which is beneficial to saving the first accommodation space and ensuring a smaller size of the inverter.

[0058] Furthermore, if Figure 1 、 Figure 4 、 Figure 5 as well as Figure 7 As shown, a fourth avoidance opening 23 is provided on the side of the shell 2 opposite to the second side plate 12, and an outer cover 24 is provided at the fourth avoidance opening 23; and the control board assembly includes a control board 41 and an external terminal 42; wherein, the control board 41 is vertical and electrically connected to one side of the power board 31, that is, the control board 41 is located on the same side as the power module 32, the rectifier module 34 and the capacitor 33, respectively, and the control board 41 is located in the second accommodating space and is arranged in contact with the second side plate 12; the external terminal 42 is electrically connected to the control board 41 and is arranged corresponding to the fourth avoidance opening 23, so that the external terminal 42 can be connected to an external cable through the fourth avoidance opening 23; and, by covering the fourth avoidance opening 23 with the outer cover 24, protection can be provided for the external terminal 42.

[0059] It is worth noting that the various components in the power board assembly and control board assembly involved above are common structures in existing inverters, and their working principles will not be introduced in detail here.

[0060] Furthermore, if Figures 1 to 3 ,as well as Figure 8As shown, the inner shell 1 also includes a third side plate 13, which is arranged on the side of the inner shell 1 away from the second side plate 12. That is, the third side plate 13 is arranged opposite the second side plate 12. A second mounting groove 131 is provided at the lower portion of the third side plate 13. A guide rail clip 8 is inserted into the second mounting groove 131. The guide rail clip 8 is used to clip onto the guide rail to limit the movement of the inverter on the guide rail by pulling the guide rail clip 8, so as to ensure the stability of the inverter's position on the guide rail and prevent the entire inverter from moving on the guide rail. Among them, the guide rail clip 8 is a common clip structure in existing inverters, and the structure and working process of the guide rail clip 8 will not be described in detail here.

[0061] Furthermore, if Figures 1 to 5 As shown, a mounting clip 16 is provided on one of the inner shell 1 and the outer shell 2, and a slot 25 is provided on the other. The mounting clip 16 is snapped into the slot 25 to achieve the buckling connection of the outer shell 2 on the outside of the inner shell 1, ensuring the stability of the connection between the outer shell 2 and the inner shell 1, while facilitating the removal of the outer shell 2 from the inner shell 1. In this embodiment, the mounting clip 16 is provided on the inner shell 1, and the slot 25 is provided on the outer shell 2.

[0062] The inverter in this embodiment makes reasonable use of the first accommodation space and the second accommodation space between the outer shell 2 and the inner shell 1, so that the power board 31, the power module 32, the rectifier module 34 and the capacitor 33 can be reasonably arranged and accommodated in the first accommodation space respectively; and the power module 32, the rectifier module 34 and the fan 6 are reasonably arranged corresponding to the positions of the radiator 5, so as to ensure the compact structure and the heat dissipation effect at the same time; at the same time, the control board 41 is arranged in close contact with the second side plate 12 of the inner shell 1, which can further save space and make the inverter smaller.

[0063] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. Frequency converter, characterized in that, include: An inner shell (1) and an outer shell (2), wherein the inner shell (1) comprises a first side plate (11) and a second side plate (12), and the outer shell (2) is arranged on the outside of the inner shell (1), a first accommodating space is formed between the outer shell (2) and the first side plate (11), and a second accommodating space is formed between the outer shell (2) and the second side plate (12), and the first accommodating space is communicated with the second accommodating space; A power board assembly and a control board assembly, wherein the control board assembly is electrically connected to the power board assembly, the power board assembly is arranged in the first accommodating space, and the control board assembly is arranged in the second accommodating space.

2. The frequency converter according to claim 1, characterized in that: A receiving cavity (15) is provided on the side of the inner shell (1) facing away from the first side plate (11), a first mounting groove (14) is provided on the top of the inner shell (1), the first mounting groove (14) and the first receiving space are respectively connected to the receiving cavity (15), a heat sink (5) is provided in the receiving cavity (15), the heat sink (5) is in contact with the power board assembly, a fan (6) is provided in the first mounting groove (14), and the fan (6) is configured to discharge hot air in the receiving cavity (15) to the external environment.

3. The frequency converter according to claim 2, characterized in that: The top of the housing (2) is provided with a first avoidance opening (21) matching the fan (6), the fan (6) is directly opposite the first avoidance opening (21), and a detachable cover is provided at the first avoidance opening (21) with a fan cover (22).

4. The frequency converter according to claim 3, characterized in that: The fan cover (22) is provided with a plurality of heat dissipation holes (221), and one side of the fan cover (22) is connected to an elastic hook (222), and the elastic hook (222) is engaged with the housing (2).

5. The frequency converter according to any one of claims 1 to 4, characterized in that: The first side panel (11) comprises a first split panel (111) and a second split panel (112) connected to each other, the first split panel (111) and the second split panel (112) being arranged in a stepped manner, and the first split panel (111) is provided with a second avoidance opening (1111) communicating with the accommodating cavity (15) in the inner shell (1); the power panel assembly comprises: Power board (31); A power module (32) is electrically connected to one side of the power board (31), and the power module (32) contacts the heat sink (5) in the accommodating cavity (15) through the second avoidance opening (1111).

6. The frequency converter according to claim 5, characterized in that: The first split plate (111) is further provided with a third avoidance opening (1112) communicating with the accommodating cavity (15), and the third avoidance opening (1112) is located below the second avoidance opening (1111); the power board assembly further comprises: A rectifier module (34) is electrically connected to the power board (31) and is located on the same side as the power module (32), and the rectifier module (34) contacts the heat sink (5) through the third avoidance opening (1112).

7. The frequency converter according to claim 5, characterized in that: The second sub-plate (112) is provided with a protrusion (1121), and the protrusion (1121) is provided with a receiving groove (1122) communicating with the receiving cavity (15); the power board assembly further comprises: A capacitor (33) is electrically connected to the power board (31) and is located on the same side as the power module (32). The capacitor (33) is disposed in the receiving groove (1122) and contacts the heat sink (5).

8. The frequency converter according to any one of claims 1 to 4, characterized in that: A fourth avoidance opening (23) is provided on a side of the housing (2) opposite to the second side plate (12), and an outer cover (24) is provided on the fourth avoidance opening (23); the control panel assembly comprises: A control board (41) is electrically connected to the power board assembly, and the control board (41) is located in the second accommodating space and is arranged in close contact with the second side panel (12); The external terminal (42) is electrically connected to the control board (41) and is arranged corresponding to the fourth avoidance opening (23).

9. The frequency converter according to any one of claims 1 to 4, characterized in that: The inner shell (1) further comprises a third side plate (13), the third side plate (13) being arranged on a side of the inner shell (1) facing away from the second side plate (12), a second mounting groove (131) being arranged at a lower portion of the third side plate (13), a guide rail buckle (8) being inserted into the second mounting groove (131), and the guide rail buckle (8) being used for being clamped onto the guide rail.

10. The frequency converter according to any one of claims 1 to 4, characterized in that: One of the inner shell (1) and the outer shell (2) is provided with a mounting buckle (16), and the other is provided with a card slot (25), and the mounting buckle (16) is snapped into the card slot (25).

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