Embedded installation frequency converter and control cabinet

Abstract

This application discloses an embedded frequency converter and control cabinet, relating to the field of electrical equipment technology. In this embedded frequency converter, the top and bottom of the housing have openings; a top cover is installed at the top opening of the housing, and a control panel is mounted on the top cover; a first partition is located in the inner cavity of the housing, below the top cover, and an upper cavity exists between the first partition and the top cover. The first partition houses a control circuit board assembly, and both the control panel and the control circuit board assembly are located within the upper cavity; a bottom plate is located at the bottom opening of the housing, below the first partition, and a lower cavity exists between the bottom plate and the first partition. The bottom plate houses a main power circuit board assembly, which is inserted into the lower cavity; a cooling assembly is located in the housing for cooling the frequency converter assembly. This embedded frequency converter has a reasonable functional layering, which effectively reduces the possibility of failure due to environmental factors, resulting in high reliability.

Description

Technical Field

[0001] This application relates to the field of electrical equipment technology, and more specifically, to an embedded frequency converter and control cabinet. Background Technology

[0002] Frequency converters utilize frequency conversion technology and microelectronics technology. They are mainly composed of rectification, filtering, inversion, braking units, drive units, detection units, and microprocessor units. Frequency converters adjust the voltage and frequency of the output power supply by switching the insulated gate bipolar transistors inside the IGBT module. They provide the required power voltage and current according to the actual needs of the motor, thereby achieving energy saving and speed regulation. In addition, frequency converters have many protection functions, such as overcurrent, overvoltage, and overload protection, and frequency converters have been widely used.

[0003] However, when products equipped with frequency converters are used in highly polluted environments such as dust, lint, high humidity, and oil, the frequency converters are prone to failure due to environmental pollution. Although there are some frequency converter products with high protection levels, they are mainly designed for general industrial use. In practice, it has been found that these types of frequency converter products often fail during use and require frequent maintenance.

[0004] In conclusion, how to provide a frequency converter product with a reduced failure rate is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] In view of this, the purpose of this application is to provide an embedded frequency converter with a lower failure rate compared to related technologies.

[0006] Another object of this application is to provide a control cabinet including the above-described embedded frequency converter.

[0007] To achieve the above objectives, this application provides the following technical solution:

[0008] An embedded frequency converter includes a frequency converter assembly. The frequency converter assembly includes a control panel, a control circuit board assembly, and a main power circuit board assembly. The main power circuit board assembly processes input current. The control circuit board assembly is electrically connected to the main power circuit board assembly and is used to detect the current processed by the main power circuit board assembly and control the main power circuit board assembly. The control panel is electrically connected to the control circuit board assembly and is used to output detection results and input control commands. The converter also includes:

[0009] The casing has openings at both the top and bottom;

[0010] A top cover is installed at the top opening of the housing, and the control panel is mounted on the top cover;

[0011] A first partition is disposed in the inner cavity of the outer shell and located below the upper cover plate. An upper cavity is formed between the first partition and the upper cover plate. The first partition is provided with the control circuit board assembly. The control panel and the control circuit board assembly are both located in the upper cavity.

[0012] A base plate is provided at the bottom opening of the outer shell and located below the first partition. A lower cavity is provided between the base plate and the first partition. The power main circuit board assembly is provided on the base plate and inserted into the lower cavity.

[0013] A cooling assembly, located in the housing, is used to cool the inverter assembly.

[0014] Preferably, the cooling assembly includes a heat sink, which is mounted on the bottom of the base plate and is disposed opposite to the power main circuit board assembly.

[0015] Preferably, an IGBT module is mounted on the bottom surface of the power main circuit circuit board assembly, the bottom plate has a clearance through hole, the bottom end of the IGBT module is inserted into the clearance through hole, and the bottom surface of the IGBT module is in contact with the top surface of the heat sink.

[0016] Preferably, the top surface of the power main circuit circuit board assembly is provided with a main circuit terminal block, the first end of the first partition is connected to the first side plate of the housing, and the second end has an installation space between it and the second side plate of the housing. The main circuit terminal block is located between the second end of the first partition and the second side plate. The main circuit terminal block is electrically connected to the power main circuit circuit board assembly and the control circuit board assembly, and is used for electrically connecting to external circuits.

[0017] Preferably, the inverter assembly further includes an electrolytic capacitor circuit board assembly for buffering current, and the embedded inverter further includes a second partition plate, which is mounted on the base plate and located between the base plate and the power main circuit circuit board assembly.

[0018] The cooling assembly also includes an electrolytic capacitor protective cover, which is located at the bottom of the base plate and forms a cooling air duct with the base plate. One end of the cooling air duct is connected to the ventilation port of the radiator.

[0019] The second partition is equipped with the electrolytic capacitor circuit board assembly, and the electrolytic capacitor in the electrolytic capacitor circuit board assembly extends into the cooling air duct;

[0020] The outer periphery of the electrolytic capacitor is covered with a protective sleeve, which is a rubber tube sleeve.

[0021] Preferably, the base plate includes a base plate body and a fixing plate; the base plate body is disposed opposite to the first partition and has the lower cavity between them; the fixing plate protrudes outward toward the outer shell and has a connecting part for connecting to the cabinet of the control cabinet, so as to separate the outer shell, the heat sink and the electrolytic capacitor protective cover into two independent spaces;

[0022] And / or, the bottom end of the heat sink has a rounded corner on the side away from the electrolytic capacitor protective cover.

[0023] Preferably, the second side plate of the housing is provided with a plurality of wire holes, and the embedded frequency converter further includes a plurality of sealing plugs, the heads of which can be inserted into or pulled out of the corresponding wire holes.

[0024] Preferably, the sealing plug has an annular groove on its circumferential surface, which can engage with the thread hole.

[0025] Preferably, the first partition is a zigzag bent plate, the first end of the first partition is close to the upper cover plate, and the second end of the first partition is close to the bottom plate;

[0026] The control panel is installed at the first end of the first partition, and the control circuit board assembly is installed at the second end of the first partition.

[0027] A control cabinet includes a cabinet body and an embedded frequency converter as described in any of the above claims;

[0028] The cabinet has a frequency converter mounting chamber. The side wall of the frequency converter mounting chamber at the middle height position has an annular mounting plate. The embedded frequency converter is inserted into the frequency converter mounting chamber, and the fixing plate is sealed to the mounting plate to divide the frequency converter mounting chamber into two independent parts.

[0029] In this application, the top and bottom of the housing are open to facilitate the installation of the inverter assembly inside. Along the height direction of the housing, a top cover plate, a first partition plate, and a bottom plate are arranged sequentially from top to bottom. The top cover plate closes the opening at the top of the housing, and the bottom plate closes the opening at the bottom of the housing. The first partition plate is located at the middle of the height of the housing to divide the internal cavity of the housing into two parts: the upper cavity between the top cover plate and the first partition plate, and the lower cavity between the bottom plate and the first partition plate.

[0030] Correspondingly, the control panel, control circuit board assembly, and power main circuit board assembly are arranged sequentially from top to bottom. Specifically, an accommodating opening is provided on the upper cover plate, and the control panel is inserted and snapped into the accommodating opening, with the front of the control panel facing the outside of the housing to facilitate operation by the staff. The structure on one side of the back of the control panel is inserted into the upper cavity to facilitate electrical connection with other components of the frequency converter assembly.

[0031] The control circuit board assembly is installed on the first partition, and the control circuit board assembly is located above the first partition. Therefore, the main structure of the control panel and the control circuit board assembly are both located in the upper cavity.

[0032] The main power circuit board assembly is mounted on the base plate, and if the main power circuit board assembly is located above the base plate, then the main power circuit board assembly is located in the lower cavity.

[0033] To ensure the operational stability of the inverter components, a cooling assembly is installed on the housing. The cooling assembly includes at least one of a fan and a radiator, which can achieve cooling through methods such as air cooling or heat conduction.

[0034] In summary, this embedded inverter features a reasonable functional hierarchy, with each layer being relatively independent and non-interfering with each other. Its internal structure is orderly distributed, which effectively reduces the possibility of failure due to environmental factors, resulting in high reliability. Furthermore, this embedded inverter makes full use of the internal space of the inverter, has a small size, and is easy to install in a control cabinet. In addition, this embedded inverter is designed for the specific textile industry, which effectively improves the applicability of the inverter. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0036] Figure 1 This is a top view of the frequency converter provided in an embodiment of the present utility model;

[0037] Figure 2 This is a schematic diagram of the inverter provided in an embodiment of the present invention;

[0038] Figure 3 This is a plan view of the frequency converter provided in an embodiment of the present utility model;

[0039] Figure 4 This is an exploded view of the frequency converter provided in an embodiment of the present utility model;

[0040] Figure 5 This is a schematic diagram of the outer shell provided in an embodiment of the present utility model;

[0041] Figure 6 This is a schematic diagram of the structure of the upper cover plate provided in an embodiment of the present utility model;

[0042] Figure 7 A plan view of the control circuit board assembly provided in an embodiment of this utility model;

[0043] Figure 8 A perspective view of the control panel provided in an embodiment of this utility model;

[0044] Figure 9 A three-dimensional structural diagram of the power supply main circuit board assembly provided in an embodiment of this utility model;

[0045] Figure 10 This is a perspective structural diagram of the radiator provided in an embodiment of the present utility model;

[0046] Figure 11 A three-dimensional structural diagram of the IGBT module provided in the embodiment of this utility model;

[0047] Figure 12 An exploded view of the electrolytic capacitor circuit board assembly provided in an embodiment of this utility model;

[0048] Figure 13 A perspective view of the main circuit terminal block provided in an embodiment of this utility model;

[0049] Figure 14 A perspective view of the sealing plug provided in an embodiment of this utility model;

[0050] Figure 15 This is a schematic diagram illustrating the use of this utility model according to an embodiment.

[0051] 1-Outer casing; 101-Wire hole; 2-Top cover; 201-Accommodation opening; 3-Control circuit board assembly; 301-First mounting hole; 302-Second fixing hole; 4-Control panel; 401-Second mounting hole; 5-Power main circuit board assembly; 501-Third mounting hole; 502-Upright pole; 6-Heat sink; 601-Fourth mounting hole; 602-Sixth fixing hole; 603-Heat sink; 7-IGBT module; 701-Sixth mounting hole; 8-Protective sleeve; 9-Electrolytic capacitor Circuit board assembly; 901-Electrolytic capacitor control circuit board; 902-Electrolytic capacitor; 10-Main circuit terminal block; 1001-Pin; 11-Electrolytic capacitor protective cover; 12-Sealing plug; 1201-Annular slot; 13-Base plate; 1301-Base plate body; 13011-Fourth fixing hole; 1302-Fixing plate; 13021-First connecting hole; 14-Upper cavity; 15-First partition; 1501-Leaving through hole; 16-Lower cavity; 17-Second partition; 18-Mounting plate. Detailed Implementation

[0052] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0053] The core of this application is to provide an embedded frequency converter, which has a lower failure rate compared to related technologies. Another core aspect of this application is to provide a control cabinet that includes the aforementioned embedded frequency converter.

[0054] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0055] To realize the inverter function, the embedded inverter is equipped with inverter components, including a main power circuit board assembly 5 for processing the input current; a control circuit board assembly 3 for detecting the current processed by the main power circuit board assembly 5 and controlling the main power circuit board assembly 5; and a control panel 44 with a display screen and input components. The control panel 4 is electrically connected to the control circuit board assembly 3 so that it can display the detection results of the control circuit board assembly 3 on the display screen and input control commands to the control circuit board assembly 3 through the input components, so as to control the operation of the main power circuit board assembly 5 through the control circuit board assembly 3 to realize the preset processing of the current. Since the control panel 4, control circuit board assembly 3 and main power circuit board assembly 5 with the above-mentioned corresponding functions are all mature technologies in the field, they will not be described in detail here.

[0056] This application provides an embedded inverter, including: a housing 1 and an upper cover plate 2, a first partition plate 15, a bottom plate 13, and a cooling assembly disposed on the housing 1; wherein, the top and bottom of the housing 1 have openings; the upper cover plate 2 is installed at the top opening of the housing 1, and a control panel 4 is installed on the upper cover plate 2; the first partition plate 15 is disposed in the inner cavity of the housing 1 and is located below the upper cover plate 2, and an upper cavity 14 is formed between the first partition plate 15 and the upper cover plate 2, and a control circuit board assembly 3 is disposed on the first partition plate 15, and both the control panel 4 and the control circuit board assembly 3 are located in the upper cavity 14; the bottom plate 13 is disposed at the bottom opening of the housing 1 and is located below the first partition plate 15, and a lower cavity 16 is formed between the bottom plate 13 and the first partition plate 15, and a power main circuit circuit board assembly 5 is disposed on the bottom plate 13, and the power main circuit circuit board assembly 5 is inserted into the lower cavity 16; the cooling assembly is disposed on the housing 1 and is used to cool the inverter assembly.

[0057] like Figures 2 to 5 , Figure 10 As shown, the top and bottom of the housing 1 are open to facilitate the installation of the inverter assembly inside. The housing 1 can be a one-piece molded structure or a bent plate structure made by sheet metal processing. Along the height direction of the housing 1, from top to bottom, there are an upper cover plate 2, a first partition plate 15 and a bottom plate 13. The upper cover plate 2 closes the opening at the top of the housing 1 and the bottom plate 13 closes the opening at the bottom of the housing 1. The first partition plate 15 is located at the middle of the height of the housing to divide the internal cavity of the housing 1 into two parts, namely the upper cavity 14 between the upper cover plate 2 and the first partition plate 15, and the lower cavity 16 between the bottom plate 13 and the first partition plate 15.

[0058] It should be noted that the method of fixing the first partition 15 to the outer shell 1 is not limited, such as bonding or snap-fit ​​connection. Preferably, the first partition 15 and the outer shell 1 are integrally formed structural components.

[0059] Correspondingly, the control panel 4, control circuit board assembly 3, and power main circuit circuit board assembly 5 are arranged sequentially from top to bottom. Specifically, an accommodating opening 201 is provided on the upper cover plate 2. The control panel 4 is inserted into and snapped into the accommodating opening 201, and the front of the control panel 4 faces the outside of the housing to facilitate operation by the staff. The back side of the control panel 4 is inserted into and extends into the upper cavity 14 to facilitate electrical connection with other components of the frequency converter assembly.

[0060] The control circuit board assembly 3 is installed on the first partition 15 and the control circuit board assembly 3 is located above the first partition 15. Therefore, the main structure of the control panel 4 and the control circuit board assembly 3 are both located in the upper cavity 14.

[0061] The main power circuit board assembly 5 is mounted on the base plate 13, and the main power circuit board assembly 5 is located above the base plate 13, so the main power circuit board assembly 5 is located in the lower cavity 16.

[0062] To ensure the operational stability of the inverter components, a cooling assembly is installed on the housing 1. This cooling assembly includes at least one of a fan and a radiator 6, enabling cooling through methods such as air cooling or conductive heat dissipation. For example, in some embodiments, based on the aforementioned layered arrangement of the inverter components, filters are placed over the electronic devices in each layer, such as filters over the control circuit board assembly 3 and the main power circuit board assembly 5. Alternatively, the fan arrangement can be adjusted, for example, each layer can be equipped with two opposing fans. (Refer to...) Figure 2 The structure shown has two fans on each layer, one on the left side panel and one on the right side panel. Air outlets are also provided in the middle of the front and back panels of the housing. Alternatively, by combining the layered layout with a diversion structure, the possibility of malfunctions due to environmental pollution can be effectively reduced.

[0063] In summary, this embedded inverter features a reasonable functional hierarchy, with each layer being relatively independent and non-interfering with each other. Its internal structure is orderly distributed, which effectively reduces the possibility of failure due to environmental factors, resulting in high reliability. Furthermore, this embedded inverter makes full use of the internal space of the inverter, has a small size, and is easy to install in a control cabinet. In addition, this embedded inverter is designed for the specific textile industry, which effectively improves the applicability of the inverter.

[0064] Based on the above embodiments, the cooling assembly includes a heat sink 6, which is mounted on the bottom of the base plate 13 and is disposed opposite to the power main circuit board assembly 5.

[0065] Please refer to Figures 2 to 4Specifically, the top surface of the base plate 13 faces the inner cavity of the housing, while the bottom surface of the base plate 13 is located outside the housing. The heat sink 6 is located at the bottom of the base plate 13, and thus the heat sink 6 is located outside the cavity structure formed by the upper cover plate 2, the outer shell 1, and the base plate 13. In this embodiment, by using an external heat sink 6, the embedded inverter can conduct heat to the heat sink 6 through conduction, thereby increasing the heat dissipation area and ensuring the heat dissipation effect. Since the use of the heat sink 6 eliminates the need to guide ambient gas into the upper cavity 14 and the lower cavity 16, the impact of pollutants such as cotton wool and dust in the external environment on the embedded inverter is reduced, further reducing the inverter failure rate. Moreover, the power main circuit board assembly 5 is one of the main heat sources in the embedded inverter. Since the power main circuit board assembly 5 is located on the base plate 13 and is positioned opposite to the power main circuit board assembly 5, the heat sink 6 is close to the power main circuit board assembly 5, which is beneficial to improving the heat dissipation effect.

[0066] Based on the above embodiment, an IGBT module 7 is mounted on the bottom surface of the power main circuit circuit board assembly 5, the bottom plate 13 has a clearance through hole 1501, the bottom end of the IGBT module 7 is inserted into the clearance through hole 1501, and the bottom surface of the IGBT module 7 is in contact with the top surface of the heat sink 6.

[0067] Please refer to Figures 2 to 6 , Figure 11 An IGBT module 7 is mounted on the bottom surface of the power main circuit circuit board assembly 5. Specifically, the pins 1001 on the top of the IGBT module 7 are inserted into and soldered onto the control circuit board in the power main circuit circuit board assembly 5. The first partition 15 has a clearance through hole 1501. The IGBT module 7 passes through the clearance through hole 1501 and is attached to the peripheral wall of the clearance through hole 1501. The bottom surface of the metal conductive block of the bottom of the IGBT module 7 is attached to the top surface of the heat sink 6. Since the IGBT module 7 is a high-power heat-generating electronic component, by attaching the bottom surface of the IGBT module 7 to the top surface of the heat sink 6, the IGBT module 7 can be cooled down quickly. In use, the heat generated by the internal electronic components of the embedded inverter can be quickly conducted to the heat sink 6 through the IGBT module 7 to achieve rapid heat dissipation.

[0068] Based on the above embodiments, a main circuit terminal block 10 is provided on the top surface of the power main circuit circuit board assembly 5. The first end of the first partition 15 is connected to the first side plate of the housing 1, and there is an installation space between the second end and the second side plate of the housing 1. The main circuit terminal block 10 is located between the second end of the first partition 15 and the second side plate. The main circuit terminal block 10 is electrically connected to the power main circuit circuit board assembly 5 and the control circuit board assembly 3, and is used to electrically connect to external circuits.

[0069] Please refer to Figures 2 to 4, Figure 13 Specifically, a main circuit terminal block 10 is mounted on the top surface of the main power circuit circuit board assembly 5. The bottom of the main circuit terminal block 10 has pins 1001. The pins 1001 of the main circuit terminal block 10 are soldered onto the main power circuit circuit board assembly 5. The main circuit terminal block 10 has several electrical connection terminals. Some of the connection terminals of the main circuit terminal block 10 are connected to the main power circuit board, some of the connection terminals are connected to the control circuit board assembly 3, and some of the connection terminals are used to connect to external circuits, such as motor circuits.

[0070] In some embodiments, the circuit board circuit in the main power circuit board assembly 5 is connected in series with the circuit board circuit in the control circuit board assembly 3, and is connected in series with the main circuit terminal block 10. The main circuit terminal block 10 can receive current and transmit it to the main power circuit board to process the current input to the embedded frequency converter, and transmit the processed current to the control circuit board assembly 3. Finally, the detected current is output.

[0071] In other embodiments, the circuit board circuit in the main power circuit board assembly 5 and the circuit board circuit in the control circuit board assembly 3 are connected in parallel and are both electrically connected to the main circuit terminal block 10. The main circuit terminal block 10 receives current and transmits it to the main power circuit board to process the current input to the embedded inverter. The processed current is directly transmitted to the main circuit terminal block 10 for output. The remaining processed current is transmitted to the control circuit board assembly 3 and then output through the main circuit terminal block 10.

[0072] Of course, the connection method between the main circuit terminal block 10 and the power main circuit circuit board assembly 5 and the control circuit board assembly 3 is not limited to the above-mentioned examples, as long as the inverter function can be realized.

[0073] Correspondingly, the left end of the first partition 15 is fixedly connected to the left side plate of the outer casing 1, while the right end of the first partition 15 and the right side plate of the outer casing 1 have reserved installation space. The top structure of the main circuit terminal block 10 extends upward and is inserted into the installation space. The main circuit terminal block 10 can form a certain blockage of the lower cavity 16, enhance the functional layering effect inside the inverter, and facilitate the arrangement of wires.

[0074] Based on the above embodiment, the device further includes a second partition 17, which is installed on the base plate 13 and located between the base plate 13 and the power main circuit circuit board assembly 5; the cooling assembly further includes an electrolytic capacitor protective cover 11, which is located at the bottom of the base plate 13, and the electrolytic capacitor protective cover 11 and the base plate 13 form a cooling air duct, one end of which is connected to the ventilation port of the heat sink 6; the second partition 17 is equipped with an electrolytic capacitor circuit board assembly 9, and the electrolytic capacitor 902 in the electrolytic capacitor circuit board assembly 9 extends into the cooling air duct.

[0075] Please refer to Figures 2 to 4 , Figure 12 Specifically, a second partition 17 is installed on the base plate 13, and the second partition 17 is located below the base plate 13. Both the second partition 17 and the base plate 13 have through holes for mounting electrolytic capacitors 902. An electrolytic capacitor protective cover 11 is installed on the base plate 13, and the electrolytic capacitor protective cover 11 is located at the bottom of the base plate 13. The electrolytic capacitor protective cover 11 is located on the right side, and the heat sink 6 is located on the left side. The air port at the left end of the electrolytic capacitor protective cover 11 is connected to the air port at the right end of the heat sink 6, so that the heat sink 6 and the electrolytic capacitor protective cover 11 form a heat dissipation air duct. The circulating air in the heat dissipation air duct will not affect the electronic components in the upper cavity 14 and the lower cavity 16. While cooling the inverter components inside the embedded inverter, it reduces the inverter components from external environmental pollution, reduces the inverter failure rate, and improves the service life of the inverter.

[0076] Correspondingly, the electrolytic capacitor circuit board assembly 9 is mounted on the second partition 17. The electrolytic capacitor circuit board assembly 9 includes an electrolytic capacitor control circuit board 901 and an electrolytic capacitor 902. The electrolytic capacitor control circuit board 901 is mounted on the second partition 17 and is located at the top of the base plate 13. Correspondingly, the electrolytic capacitor 902 is mounted at the bottom of the electrolytic capacitor control circuit board 901, and the electrolytic capacitor 902 passes through the electrolytic capacitor 902 mounting through hole and is inserted downward into the inner cavity of the electrolytic capacitor protective cover 11.

[0077] When the embedded inverter is in use, the heat generated by the inverter components will be conducted to the heat sink 6, so that the heat can be removed by the heat sink 6. The air carrying heat discharged from the heat sink 6 flows through the electrolytic capacitor protective cover 11, which will carry away the heat from the surface of the electrolytic capacitor 902 and the surface of the heat sink 6, thus achieving the purpose of heat dissipation.

[0078] Electrolytic capacitor 902 is also a high-power heat-generating electronic component. Electrolytic capacitor 902 is inserted in electrolytic capacitor protective cover 11, that is, electrolytic capacitor 902 is located in heat dissipation air duct. The heat generated by electrolytic capacitor 902 during operation is quickly carried to the outside of the embedded frequency converter by the circulating air in the heat dissipation air duct, which can protect electrolytic capacitor 902 and improve the cooling effect of electrolytic capacitor 902.

[0079] Furthermore, preferably, the heat sink 6 has a plurality of heat sink fins 603 arranged in an array inside the outer casing 1. The length direction of the heat sink fins 603 is parallel to the length direction of the outer casing 1 and the direction of air circulation. That is, the heat sink fins 603 extend from one side of the electrolytic capacitor protective cover 11 to the side away from the electrolytic capacitor protective cover 11, so as to ensure that the heat sink 6 can provide maximum heat dissipation efficiency.

[0080] Based on the above embodiment, a protective sleeve 8 is provided on the outer peripheral side of the electrolytic capacitor 902, and the protective sleeve 8 is a rubber tube sleeve.

[0081] Please refer to Figures 2 to 4 , Figure 12 Specifically, the protective sleeve 8 is a hollow tube structure. The protective sleeve 8 is fitted around the outer periphery of the electrolytic capacitor 902. Since the protective sleeve 8 is made of rubber tubing, it can absorb and reduce the vibration and impact generated by the electrolytic capacitor 902 during operation by utilizing the good elastic deformation properties of rubber material, thus protecting its internal structure and components from damage. The protective sleeve 8 can also effectively prevent the electrolytic capacitor 902 from being affected by external electrical interference, improving its working stability. It can also play a role in insulation protection and prevent suspended particles such as cotton lint and dust from entering the frequency converter in the textile industry. Moreover, the protective sleeve 8 is easy to manufacture and has a low cost.

[0082] Furthermore, the top of the protective sleeve 8 has an annular flange that abuts against the bottom surface of the second partition 17 and the top surface of the base plate 13. The annular flange facilitates the installation and removal of the protective sleeve 8. Preferably, the annular flange is integrally formed with the main body structure of the protective sleeve 8, that is, the protective sleeve 8 is a one-piece molded structural component.

[0083] Based on the above embodiments, the base plate 13 includes a base plate body 1301 and a fixing plate 1302; the base plate body 1301 is disposed opposite to the first partition 15 and has a lower cavity 16 between them; the fixing plate 1302 protrudes outward toward the outer shell 1 and has a connecting part for connecting to the cabinet of the control cabinet so as to separate the outer shell 1, the heat sink 6 and the electrolytic capacitor protective cover 11 into two independent spaces.

[0084] Please refer to Figures 2 to 5 , Figure 14The base plate 13 consists of two parts: the base plate body 1301 and the fixing plate 1302. Specifically, the base plate body 1301 is located at the bottom opening of the outer shell 1 to block the bottom opening of the outer shell 1 and to form a lower cavity 16 with the first partition 15 for mounting the power main circuit circuit board assembly 5. The fixing plate 1302 extends laterally toward the outside of the outer shell 1 and extends to the outside of the outer shell 1. The outer shell 1 is located above the base plate 13, and the heat sink 6 and the electrolytic capacitor protective cover 11 are located below the base plate 13.

[0085] When the embedded frequency converter needs to be installed inside the control cabinet, and when placing the embedded frequency converter in the space inside the cabinet designated for frequency converter installation, such as... Figure 15 As shown, the fixing plate 1302 overlaps with the mounting plate 18 in the cabinet and is fixedly connected, such as by gluing or fastening. Since the fixing plate 1302 is located in the middle of the height of the embedded inverter, the heat emitted by the upper and lower parts of the embedded inverter can be dissipated into the air without affecting each other, which is beneficial to improving the heat dissipation capacity of the inverter.

[0086] Based on the above embodiment, the bottom end of the heat sink 6 has a rounded corner structure on the side away from the electrolytic capacitor protective cover 11.

[0087] Please refer to Figures 2 to 4 , Figure 10 The upper part of the heat sink 6 is attached to the base plate 13 and fixedly connected to it, while the right end of the heat sink 6 abuts against the electrolytic capacitor protective cover 11. The bottom left corner of the heat sink 6 adopts a rounded corner structure. Therefore, when the embedded frequency converter is installed in the control cabinet used in the textile industry, the possibility of cotton floating in the environment clogging the heat sink 6 is low.

[0088] Based on the above embodiment, the second side plate of the housing 1 is provided with a plurality of wire holes 101, and the embedded frequency converter also includes a plurality of sealing plugs 12, the head ends of the plurality of sealing plugs 12 can be inserted into or pulled out of the corresponding wire holes 101.

[0089] Please refer to Figures 2 to 5 , Figure 14The right side panel of the outer casing 1 has several wire holes 101, which connect to the upper cavity 14 and are used to pass wires through. The shape of the wire holes 101 can be elliptical or circular, etc. The embedded inverter is equipped with several sealing plugs 12, the number of sealing plugs 12 being greater than or equal to the number of wire holes 101. The sealing plugs 12 are designed according to the shape and size of the wire holes 101 to fit snugly into the corresponding wire holes 101. When no wire passes through, the wire holes 101 are sealed by the sealing plugs 12. At this time, each wire hole 101 without wires is fitted with a sealing plug 12. Conversely, when a wire needs to pass through the wire hole 101, the sealing plug 12 can be removed. This setting effectively enhances the sealing effect of the embedded inverter, avoids the inverter components inside the outer casing 1 from being affected by external environmental factors, and thus improves the service life of the inverter.

[0090] Based on the above embodiment, the circumferential surface of the sealing plug 12 is provided with an annular groove 1201, which can engage with the connecting wire hole 101.

[0091] Please refer to Figure 3 , Figure 4 and Figure 13 The outer peripheral side of the sealing plug 12 is provided with a complete annular groove 1201. When the sealing plug 12 is engaged with the wire hole 101 through the annular groove 1201, the annular groove 1201 is in close contact with the peripheral wall of the wire hole 101. The left side wall of the sealing plug 12 used to form the annular groove 1201 extends into the upper cavity 14 and abuts against the inner surface of the right side plate of the outer shell 1. The right side wall of the sealing plug 12 used to form the annular groove 1201 is located outside the outer shell 1 and abuts against the outer surface of the right side plate of the outer shell 1. Thus, the sealing plug 12 can be stably engaged with the wire hole 101.

[0092] Based on the above embodiment, the first partition 15 is a zigzag bent plate, the first end structure of the first partition 15 is close to the upper cover plate 2, and the second end structure of the first partition 15 is close to the bottom plate 13; and the control panel 4 is installed on the first end structure of the first partition 15, and the control circuit board assembly 3 is installed on the second end structure of the first partition 15.

[0093] Please refer to Figures 2 to 3 , Figure 7The left and right portions of the first partition 15 extend laterally, while the middle portion extends vertically and connects to the right and left ends of the left and right portions of the first partition 15. The right portion is located below the left portion, forming a recessed groove. The control circuit board assembly 3 is mounted on the right portion of the first partition 15 and within the recessed groove. The control panel 4 is located to the left of the control circuit board assembly 3, with its bottom end abutting against and mounted on the left portion of the first partition 15. This arrangement, which staggers the control panel 4 and control circuit board assembly 3, fully utilizes the internal space of the housing 1, further reducing the overall size of the inverter. The overall structural design of this embedded inverter is more reasonable.

[0094] To assemble the control circuit board assembly 3 to the first partition 15, please refer to... Figure 7 Based on the above embodiments, the circuit board in the control circuit board assembly 3 has a first mounting hole 301, the second end structure of the first partition 15 has a first fixing hole, and a first fastener is inserted into the coaxially extending first mounting hole 301 and the first fixing hole to lock the connecting circuit board assembly to the first partition 15. For example, the first fastener is a screw, the first fixing hole is a threaded hole, and the first fastener passes through the first mounting hole 301 and is embedded in the first fixing hole that extends coaxially with it.

[0095] To assemble the upper cover 2 with the outer shell 1, please refer to... Figure 6 Based on the above embodiment, at least two of the upper cover plates 2 have folded edge structures. Correspondingly, the top of the outer shell 1 has a stepped groove. The folded edge structures of the upper cover plates 2 are snapped into the stepped groove to ensure the connection strength and stability between the upper cover plates 2 and the outer shell 1.

[0096] To install Control Panel 4, please refer to... Figure 7 and Figure 8 Based on the above embodiments, the circuit board in the control circuit board assembly 3 and the first end structure of the first partition 15 both have a second fixing hole 302, the control panel 4 has a second mounting hole 401, and the second fastener is inserted into the coaxially extending second mounting hole 401 and the second fixing hole 302 to lock the control panel 4 to the control circuit board assembly 3. For example, the second fastener is a screw, the second fixing hole 302 is a threaded hole, and the second fastener passes through the second mounting hole 401 and is embedded in the coaxially extending second fixing hole 302.

[0097] To assemble the main power circuit board assembly 5 onto the base plate 1301, please refer to... Figure 2 , Figure 5 and Figure 9 Based on the above embodiments, the bottom circuit board of the power supply main circuit board assembly 5 has a third mounting hole 501, the base plate body 1301 has a third fixing hole, and a third fastener is inserted into the coaxially extending third mounting hole 501 and third fixing hole to lock the power supply main circuit board assembly 5 to the base plate body 1301. For example, the third fastener is a screw, the third fixing hole is a threaded hole, and the third fastener passes through the third mounting hole 501 and is embedded in the coaxially extending third fixing hole.

[0098] For further information, please refer to [link / reference]. Figure 2 , Figure 5 and Figure 9 The bottom surface of the power main circuit circuit board assembly 5 is provided with several uprights 502. The bottom end of the uprights 502 abuts against the top surface of the base plate 13, and the top end abuts against the bottom circuit board in the power main circuit circuit board assembly 5. The bottom end of the uprights 502 has a mounting through hole extending along its own length direction. The third fastener is inserted into the coaxially extending third mounting hole 501, mounting through hole and third fixing hole. The uprights 502 separate the power main circuit circuit board assembly 5 and the base plate 13 by a certain space, so that the IGBT module 7 can be installed at the bottom of the bottom circuit board in the power main circuit circuit board assembly 5, and it is beneficial to improve the heat dissipation effect of the power main circuit circuit board assembly 5.

[0099] To assemble the heatsink 6 with the base plate 1301, please refer to... Figure 5 and Figure 10 Based on the above embodiments, the base plate body 1301 has a plurality of fourth fixing holes 13011, the top plate of the heat sink 6 has a plurality of fourth mounting holes 601, and a plurality of fourth fasteners are inserted into the corresponding, coaxially extending fourth mounting holes 601 and fourth fixing holes 13011 to lock the heat sink 6 to the base plate body 1301. For example, the fourth fasteners are screws, the fourth fixing holes 13011 are threaded holes, and the fourth fasteners pass through the fourth mounting holes 601 and are embedded in the fourth fixing holes 13011 that extend coaxially with them.

[0100] To install this embedded inverter into the control cabinet, please refer to... Figure 2 , Figure 4 and Figure 5Based on the above embodiment, the fixing plate 1302 has a plurality of first connection holes 13021, the mounting plate 18 of the control cabinet has a plurality of second connection holes, and a plurality of seventh fasteners are inserted into the corresponding, coaxially extending first connection holes 13021 and second connection holes so that the embedded frequency converter can be locked to the control cabinet by the fixing plate 1302. For example, the seventh fastener is a screw, the second connection hole is a threaded hole, and the seventh fastener passes through the first connection hole 13021 and is embedded in the second connection hole that extends coaxially with it.

[0101] To assemble the fixing plate 1302 with the outer casing 1, please refer to... Figure 4 and Figure 5 Based on the above embodiments, the bottom perimeter of the outer shell 1 has a plurality of third connecting holes, and the fixing plate 1302 has at least two folded edge structures. Preferably, the fixing plate 1302 has two folded edge structures arranged opposite to each other. The folded edge structures of the fixing plate 1302 are sleeved on the outside of the bottom structure of the outer shell 1, and the folded edge structures of the fixing plate 1302 have a plurality of fourth connecting holes. A plurality of eighth fasteners are inserted into the corresponding, coaxially extending third connecting holes and fourth connecting holes to lock the fixing plate 1302 to the outer shell 1. For example, the eighth fasteners can be screws or rivets.

[0102] To achieve the assembly of the electrolytic capacitor protective cover 11 and the base plate body 1301, based on the above embodiment, the base plate body 1301 has a plurality of fifth fixing holes, the top edge of the electrolytic capacitor protective cover 11 has a plurality of fifth mounting holes, and a plurality of fifth fasteners are inserted into the corresponding, coaxially extending fifth mounting holes and fifth fixing holes to lock the electrolytic capacitor protective cover 11 to the base plate body 1301. For example, the fifth fasteners are screws, the fifth fixing holes are threaded holes, and the fifth fasteners pass through the fifth mounting holes and are embedded in the fifth fixing holes that extend coaxially with them.

[0103] To achieve the assembly of the IGBT module 7 and the heat sink 6, based on the above embodiment, the top plate of the heat sink 6 has a plurality of sixth fixing holes 602, the bottom of the IGBT module 7 has a plurality of sixth mounting holes 701, and a plurality of sixth fasteners are inserted into the corresponding, coaxially extending sixth mounting holes 701 and sixth fixing holes 602 to lock the electrolytic capacitor protection cover 11 to the base plate body 1301. For example, the sixth fasteners are screws, the sixth fixing holes 602 are threaded holes, and the sixth fasteners pass through the sixth mounting holes 701 and are embedded in the sixth fixing holes 602 that extend coaxially with them.

[0104] In summary, compared with related technologies, the embedded frequency converter protected in this application has the following advantages:

[0105] On the one hand, the embedded inverter forms an upper cavity 14 and a lower cavity 16 by the upper cover plate 2 and the first partition plate 15, and the bottom plate 13 and the first partition plate 15 respectively cooperating with the outer shell 1. The embedded inverter achieves functional layering, with orderly internal distribution, high space utilization, and small overall volume. Moreover, the embedded inverter can be embedded into the cabinet through the fixing plate 1302, which is more conducive to the layered layout and installation of the control cabinet.

[0106] On the other hand, the embedded inverter forms a heat dissipation channel by combining the heat sink 6, electrolytic capacitor 902, and protective sleeve 8 externally mounted on the outer casing 1 with the air inlet and outlet. The circulating air in the heat dissipation channel will not affect the electronic components in the upper cavity 14 and the lower cavity 16. While dissipating heat from the inverter components, it reduces the influence of external environmental pollutants on the inverter components, improves the inverter's protection, reduces the failure rate, has high environmental resistance, and a long service life. At the same time, by placing the heat sink 6 and electrolytic capacitor 902 externally on the outer casing 1, the embedded inverter has a smaller size, which can save materials and effectively reduce manufacturing costs.

[0107] In addition to the above, this application also provides a control cabinet including the embedded inverter disclosed in the above embodiments. The control cabinet further includes a cabinet body; the cabinet body has an inverter mounting chamber, and the side wall of the inverter mounting chamber at the middle height position has an annular mounting plate 18. The embedded inverter is inserted into the inverter mounting chamber, and the fixing plate 1302 is sealed and connected to the mounting plate 18 to divide the inverter mounting chamber into two independent parts. It should be noted that the structure of other parts of the control cabinet can be referred to the prior art, and will not be described in detail here.

[0108] In some specific embodiments, such as Figure 15 As shown, the mounting plate 18 has a connecting through hole. The embedded inverter passes through the connecting through hole. After the embedded inverter is installed on the mounting plate 18 of the cabinet by the fixing plate 1302, the fixing plate 1302 divides the outer shell 1 and the upper cover 2, the heat sink 6 and the electrolytic capacitor protection cover 11 into upper and lower parts. The mounting plate 18 of the cabinet separates the upper and lower parts of the embedded inverter into two independent spaces. Thus, the heat emitted by the upper and lower parts of the embedded inverter can be emitted into the air without affecting each other, which helps to improve the heat dissipation capacity of the inverter.

[0109] It should be noted that the relational terms such as "first" and "second" mentioned above are only used to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities; the terms "upper surface," "lower surface," "top," and "bottom" as well as the directional terms "upper," "lower," "left," and "right" mentioned above are defined based on the accompanying drawings in the specification.

[0110] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0111] The embedded frequency converter and control cabinet provided in this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this application. It should be noted that those skilled in the art can make several improvements and modifications to this application without departing from the principles of this application, and these improvements and modifications also fall within the protection scope of this application.

Claims

1. An embedded frequency converter, comprising a frequency converter assembly, the frequency converter assembly including a control panel (4), a control circuit board assembly (3), and a power main circuit board assembly (5), the power main circuit board assembly (5) being used to process input current, the control circuit board assembly (3) being electrically connected to the power main circuit board assembly (5) for detecting the current processed by the power main circuit board assembly (5) and controlling the power main circuit board assembly (5), the control panel (4) being electrically connected to the control circuit board assembly (3) for outputting detection results and inputting control commands, characterized in that, Also includes: The outer casing (1) has openings at both the top and bottom; The top cover (2) is installed at the top opening of the outer casing (1), and the control panel (4) is installed on the top cover (2). The first partition (15) is located in the inner cavity of the outer shell (1) and below the upper cover plate (2). There is an upper cavity (14) between the first partition (15) and the upper cover plate (2). The first partition (15) is provided with the control circuit board assembly (3). The control panel (4) and the control circuit board assembly (3) are both located in the upper cavity (14). A base plate (13) is provided at the bottom opening of the outer shell (1) and located below the first partition (15). A lower cavity (16) is provided between the base plate (13) and the first partition (15). The base plate (13) is provided with the power main circuit board assembly (5), and the power main circuit board assembly (5) is inserted into the lower cavity (16). A cooling assembly is provided in the housing (1) for cooling the inverter assembly.

2. The flush-mounted frequency converter according to claim 1, characterized in that The cooling assembly includes a heat sink (6), which is mounted on the bottom of the base plate (13) and is disposed opposite to the power main circuit board assembly (5).

3. The flush-mounted frequency converter according to claim 2, characterized in that The bottom surface of the power main circuit circuit board assembly (5) is equipped with an IGBT module (7), the base plate (13) has a clearance through hole (1501), the bottom end of the IGBT module (7) is inserted into the clearance through hole (1501), and the bottom surface of the IGBT module (7) is attached to the top surface of the heat sink (6).

4. The flush-mounted frequency converter according to claim 3, characterized in that The top surface of the power main circuit circuit board assembly (5) is provided with a main circuit terminal block (10). The first end of the first partition (15) is connected to the first side plate of the housing (1), and the second end has an installation space between it and the second side plate of the housing (1). The main circuit terminal block (10) is located between the second end of the first partition (15) and the second side plate. The main circuit terminal block (10) is electrically connected to the power main circuit circuit board assembly (5) and the control circuit board assembly (3), and is used to electrically connect to external circuits.

5. The flush-mounted frequency converter according to claim 4, characterized in that The inverter assembly also includes an electrolytic capacitor circuit board assembly (9), which is used to buffer current. The embedded inverter also includes a second partition (17), which is installed on the base plate (13) and located between the base plate (13) and the power supply main circuit circuit board assembly (5). The cooling assembly also includes an electrolytic capacitor protective cover (11), which is located at the bottom of the base plate (13) and forms a cooling air duct with the base plate (13). One end of the cooling air duct is connected to the ventilation port of the radiator (6). The second partition (17) is equipped with the electrolytic capacitor circuit board assembly (9), and the electrolytic capacitor (902) in the electrolytic capacitor circuit board assembly (9) extends into the cooling air duct; The outer periphery of the electrolytic capacitor (902) is covered with a protective sleeve (8), and the protective sleeve (8) is a rubber tube sleeve.

6. The flush-mounted frequency converter according to claim 5, characterized in that The base plate (13) includes a base plate body (1301) and a fixing plate (1302); the base plate body (1301) is disposed opposite to the first partition (15) and has the lower cavity (16) between them; the fixing plate (1302) protrudes outward toward the outer shell (1) and has a connecting part for connecting to the cabinet of the control cabinet so as to separate the outer shell (1), the heat sink (6) and the electrolytic capacitor protective cover (11) into two independent spaces; And / or, the bottom end of the heat sink (6) has a rounded corner structure on the side away from the electrolytic capacitor protective cover (11).

7. The flush-mounted frequency converter according to any of claims 1 - 5, characterized in that The second side plate of the housing (1) is provided with a plurality of wire holes (101), and the embedded frequency converter also includes a plurality of sealing plugs (12), the head ends of the plurality of sealing plugs (12) can be inserted into or pulled out of the corresponding wire holes (101).

8. The flush-mounted frequency converter according to claim 7, characterized in that The sealing plug (12) has an annular groove (1201) on its circumferential surface, which can be engaged with the thread hole (101).

9. The flush-mounted frequency converter according to any of claims 1 - 5, characterized in that The first partition (15) is a zigzag bent plate. The first end structure of the first partition (15) is close to the upper cover plate (2), and the second end structure of the first partition (15) is close to the bottom plate (13). The control panel (4) is installed on the first end structure of the first partition (15), and the control circuit board assembly (3) is installed on the second end structure of the first partition (15).

10. A control cabinet comprising a cabinet body, characterized in that It also includes the embedded-mount frequency converter as described in any one of claims 1-9 above; The cabinet has a frequency converter mounting chamber. The side wall of the frequency converter mounting chamber at the middle height position has an annular mounting plate (18). The embedded frequency converter is inserted into the frequency converter mounting chamber, and the fixing plate (1302) is sealed to the mounting plate (18) to divide the frequency converter mounting chamber into two independent parts.

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