A three-proof fully enclosed frequency converter

Abstract

This utility model provides a three-proof, fully enclosed frequency converter, belonging to the field of frequency converter technology. It includes a protective assembly comprising a base, a housing fixedly connected to the end of the base, a flange plate fixedly connected to the side wall of the housing, and a cover plate fixedly connected to the side wall of the flange plate. The frequency converter assembly includes a heat sink fixedly connected to the middle of the housing, fins adapted and installed on the side wall of the heat sink, a frequency converter main unit fixedly connected to the middle of the heat sink, and an operation panel adapted and installed on the side wall of the frequency converter main unit. The advantages of this utility model are: it can resist high-intensity water spray and dust intrusion, making it suitable for humid and dusty industrial environments. The explosion-proof design meets the requirements for use in hazardous areas, and the explosion-proof glass plate and explosion-proof switch ensure safe operation in flammable and explosive environments. The frequency converter maintains good heat dissipation performance even in a fully enclosed state, extending the service life of electronic components. Operation and monitoring can be performed without opening the cover plate, reducing maintenance time and risks.

Description

Technical Field

[0001] This utility model belongs to the field of frequency converter technology, specifically relating to a three-proof fully enclosed frequency converter. Background Technology

[0002] A frequency converter (VDC) is a power control device that uses frequency conversion technology and microelectronics to control an AC motor by changing the frequency of its power supply. A VDC mainly consists of a rectification unit (AC to DC), a filtering unit, an inverter (DC to AC), a braking unit, a drive unit, a detection unit, and a microprocessor unit. In the field of industrial automation, the VDC serves as a core control device, and its operational stability directly affects the reliability of the production line.

[0003] However, traditional frequency converters face significant challenges in harsh environments such as humid, dusty, and flammable / explosive conditions:

[0004] Humid environments: In chemical, food processing and other settings, high humidity can easily lead to corrosion of internal circuits, decreased insulation performance, and even short circuit failures.

[0005] Dust hazards: Metal dust, coal dust and other particles in mines, metallurgical plants and other places can easily enter the interior through heat dissipation holes and accumulate on the surface of electronic components, causing heat dissipation failure and poor contact.

[0006] Flammable and explosive risks: Explosive gas mixtures exist in the petrochemical and pharmaceutical industries, and the open structure of traditional frequency converters may cause safety accidents due to electrical sparks. Utility Model Content

[0007] The purpose of this invention is to provide a three-proof, fully enclosed frequency converter, which aims to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A three-proof, fully enclosed frequency converter, comprising,

[0010] The protective assembly includes a base, a housing fixedly connected to the end of the base, a flange plate fixedly connected to the side wall of the housing, and a cover plate fixedly connected to the side wall of the flange plate.

[0011] The inverter assembly includes a heat sink fixedly connected to the middle of the housing, fins adapted to be installed on the side wall of the heat sink, an inverter main unit fixedly connected to the middle of the heat sink, and an operation panel adapted to be installed on the side wall of the inverter main unit. The inverter main unit and the operation panel are disposed inside the housing, and the operation panel is electrically connected to the inverter main unit via a data cable.

[0012] As a preferred embodiment of this utility model, the frequency converter assembly further includes a bracket fixedly connected inside the housing, the bracket being snapped onto the outside of the frequency converter main unit, and the side wall of the bracket having mounting holes for use with the operation panel.

[0013] In a preferred embodiment of this utility model, a spring plunger is threadedly connected to the side wall of the cover plate, the end of the spring plunger extends to the side wall of the bracket, and the end of the spring plunger cooperates with the button on the side wall of the operation panel.

[0014] As a preferred embodiment of this utility model, an explosion-proof glass plate is sealed and installed on the inner side of the cover plate. The explosion-proof glass plate is disposed on the outer side of the bracket. A pressure strip is snapped onto the side wall of the explosion-proof glass plate, and the side wall of the pressure strip is connected to the inner side of the cover plate by bolts.

[0015] As a preferred embodiment of the present invention, the frequency converter assembly further includes a decorative plate fixedly connected to the side wall of the cover plate, the decorative plate being sleeved on the side wall of the spring plunger, and the decorative plate having an avoidance hole structure in the middle for use with the explosion-proof glass plate.

[0016] As a preferred embodiment of this utility model, an explosion-proof switch is installed on the side wall of the cover plate, and the end of the explosion-proof switch extends into the interior of the box.

[0017] As a preferred embodiment of this utility model, the bottom of the enclosure is provided with a cable outlet for use with the inverter host, and an insulator is fixedly connected to the inner side wall of the enclosure, the insulator being installed on the bottom side wall of the inverter host.

[0018] Compared with existing technologies, the advantages of this invention are: it can resist high-intensity water spray and dust intrusion, making it suitable for humid and dusty industrial environments. The explosion-proof design meets the requirements for use in hazardous areas, and the explosion-proof glass panel and explosion-proof switch ensure safe operation in flammable and explosive environments. The unique heat sink and fin structure enable the inverter to maintain good heat dissipation performance even in a fully enclosed state, extending the service life of electronic components. The integrated design of the heat dissipation system and protective structure avoids the risk of dust and moisture intrusion from traditional cooling fans. The externally operable spring plunger and visible explosion-proof glass panel design allow for operation and monitoring without opening the cover, reducing maintenance time and risks. The modular structure design makes each component easy to disassemble and replace, improving maintenance efficiency. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a front structural diagram of the present invention;

[0022] Figure 3 This is a schematic diagram of the rear structure of the present invention;

[0023] Figure 4 This is a schematic cross-sectional view of section AA of the present invention.

[0024] In the diagram: 100, protective component; 101, base; 102, enclosure; 103, flange plate; 104, cover plate; 200, inverter assembly; 201, heat sink; 202, fins; 203, inverter main unit; 204, operation panel; 205, bracket; 206, spring plunger; 207, explosion-proof glass plate; 208, pressure strip; 209, decorative panel; 210, explosion-proof switch; 211, insulator. Detailed Implementation

[0025] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0026] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0027] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0028] Example

[0029] Reference Figure 1-4 This is an embodiment of the present invention, which provides a three-proof fully enclosed frequency converter, including,

[0030] The protective assembly 100 includes a base 101, a housing 102 fixedly connected to the end of the base 101, a flange plate 103 fixedly connected to the side wall of the housing 102, and a cover plate 104 fixedly connected to the side wall of the flange plate 103.

[0031] The inverter assembly 200 includes a heat sink 201 fixedly connected to the middle of the housing 102, fins 202 adapted to be installed on the side wall of the heat sink 201, an inverter host 203 fixedly connected to the middle of the heat sink 201, and an operation panel 204 adapted to be installed on the side wall of the inverter host 203. The inverter host 203 and the operation panel 204 are located inside the housing 102, and the operation panel 204 is electrically connected to the inverter host 203 via a data cable.

[0032] The base 101 serves as the fundamental support structure for the entire device, forming the first sealing structure in conjunction with the enclosure 102. The enclosure 102 provides a sealed space for the internal inverter assembly 200, is made of stainless steel, and has undergone anti-corrosion treatment. The enclosure 102 and base 101 are continuously welded together, ensuring a gapless connection. The sidewalls of the enclosure extend outwards to form flange plates 103, which are sealed to the cover plate 104 via an annular sealing groove and a weather-resistant sealing ring, forming the second sealing structure. The heat sink 201 increases the heat dissipation area of ​​the inverter main unit 203. Fins 202 are vertically arranged on the surface of the heat sink 201, further enhancing heat exchange efficiency. Thermal grease is used to fill the space between the heat sink 201 and the bottom of the inverter main unit 203, ensuring effective heat transfer to the outside of the enclosure 102. An active air supply device can also be added externally to increase heat dissipation efficiency as needed. The operation panel 204 assists in operating the inverter main unit 203.

[0033] Specifically, the inverter assembly 200 also includes a bracket 205 fixedly connected inside the housing 102. The bracket 205 is snapped onto the outside of the inverter host 203, and the side wall of the bracket 205 has a mounting hole for use with the operation panel 204. A spring plunger 206 is threadedly connected to the side wall of the cover plate 104. The end of the spring plunger 206 extends to the side wall of the bracket 205, and the end of the spring plunger 206 is used in conjunction with the button on the side wall of the operation panel 204. An explosion-proof glass plate 207 is sealed and installed on the inside of the cover plate 104. The explosion-proof glass plate 207 is located on the outside of the bracket 205. A pressure strip 208 is snapped onto the side wall of the explosion-proof glass plate 207, and the side wall of the pressure strip 208 is bolted to the inside of the cover plate 104.

[0034] The operation panel 204 is embedded in the mounting hole of the bracket 205, which facilitates external control of the operation panel 204. The outside is covered with high-strength explosion-proof glass 207 to ensure normal operation in harsh environments. The explosion-proof glass 207 is fixed to the inside of the cover plate 104 by the pressure strip 208, which can both observe the content displayed on the panel and prevent external impact from damaging the panel.

[0035] Preferably, the inverter assembly 200 also includes a decorative plate 209 fixedly connected to the side wall of the cover plate 104. The decorative plate 209 is sleeved on the side wall of the spring plunger 206, and the decorative plate 209 has a clearance hole structure in the middle for use with the explosion-proof glass plate 207.

[0036] The decorative panel 209 is used to cover the installation area of ​​the explosion-proof glass 207, making the device look more aesthetically pleasing and facilitating the addition of markings on the decorative panel 209 to identify the operation buttons corresponding to the spring plunger 206.

[0037] It should be noted that an explosion-proof switch 210 is installed on the side wall of the cover plate 104, and the end of the explosion-proof switch 210 extends into the interior of the enclosure 102.

[0038] The explosion-proof switch 210 on the side wall of the cover plate 104 is used to connect to the internal circuit of the enclosure 102 to achieve safe start and stop.

[0039] Preferably, the bottom of the enclosure 102 is provided with a cable outlet for use with the inverter host 203, and an insulator 211 is fixedly connected to the inner side wall of the enclosure 102, with the insulator 211 installed on the bottom side wall of the inverter host 203.

[0040] Among them, the insulator 211 on the inner side wall of the enclosure 102 adopts a silicone rubber umbrella skirt structure, which is used to cooperate with the cable installation of the inverter host 203.

[0041] During use, the base 101 and the enclosure 102 are double-sealed by welding and sealant (the groove on the edge of the base 101 matches the bottom flange of the enclosure 102) to prevent liquid from seeping in. The flange plate 103 and the cover plate 104 on the side wall of the enclosure 102 achieve radial sealing through an annular sealing groove and a weather-resistant sealing ring (included in the structure of the flange plate 103) to resist side water splashes and dust. The cable outlet at the bottom of the enclosure 102 is used to install explosion-proof glands and corresponding cables for easy use of the inverter host 203. The explosion-proof glass plate 207 inside the cover plate 104 is fixed by a pressure strip 208, which is bolted to the cover plate 104 to withstand internal pressure and prevent flame leakage. The heat generated by the inverter host 203 is conducted to the fins 202 through the heat sink 201 and dissipated by the surface of the enclosure 102.

[0042] The end of the spring plunger 206 on the side wall of the cover plate 104 extends to the side wall of the bracket 205 and engages with the button on the operation panel 204. Pressing the spring plunger 206 triggers the button via mechanical transmission. The explosion-proof switch 210 on the side wall of the cover plate 104 is used to connect to the internal circuit of the enclosure 102 to achieve safe start and stop.

[0043] In summary, the protective components form a triple protective barrier. The sealed connection between the base and the enclosure prevents liquid intrusion from the bottom; the sealed structure of the flange and cover plate blocks water splashes and dust from the sides; the combination of the explosion-proof glass plate and spring plunger design allows operators to set parameters and monitor status without opening the cover, while ensuring complete isolation between the internal circuitry and the external environment. The heat generated by the inverter is conducted to the fins through the heat sink and then dissipated to the external environment through the enclosure surface. Due to the fully enclosed design, the internal air forms a natural convection circulation, enhancing heat exchange efficiency. The sealed enclosure isolates the inverter from the external humid environment, reducing its impact on the inverter.

[0044] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Without departing from the scope of this invention, other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0045] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to implementing the present invention) may be omitted.

[0046] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0047] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A three-proof, fully enclosed frequency converter, characterized in that: include, The protective assembly (100) includes a base (101), a housing (102) fixedly connected to the end of the base (101), a flange plate (103) fixedly connected to the side wall of the housing (102), and a cover plate (104) fixedly connected to the side wall of the flange plate (103). The inverter assembly (200) includes a heat sink (201) fixedly connected to the middle of the housing (102), fins (202) adapted to be installed on the side wall of the heat sink (201), an inverter host (203) fixedly connected to the middle of the heat sink (201), and an operation panel (204) adapted to be installed on the side wall of the inverter host (203). The inverter host (203) and the operation panel (204) are disposed inside the housing (102), and the operation panel (204) is electrically connected to the inverter host (203) via a data cable.

2. The three-proof fully enclosed frequency converter according to claim 1, characterized in that: The inverter assembly (200) also includes a bracket (205) fixedly connected inside the housing (102). The bracket (205) is snapped onto the outside of the inverter host (203), and the side wall of the bracket (205) is provided with mounting holes for use with the operation panel (204).

3. A three-proof, fully enclosed frequency converter according to claim 2, characterized in that: The cover plate (104) has a spring plunger (206) threadedly connected to its side wall. The end of the spring plunger (206) extends to the side wall of the bracket (205), and the end of the spring plunger (206) is used in conjunction with the button on the side wall of the operation panel (204).

4. A three-proof, fully enclosed frequency converter according to claim 3, characterized in that: An explosion-proof glass plate (207) is sealed and installed on the inner side of the cover plate (104). The explosion-proof glass plate (207) is located on the outer side of the bracket (205). A pressure strip (208) is snapped onto the side wall of the explosion-proof glass plate (207). The side wall of the pressure strip (208) is connected to the inner side of the cover plate (104) by bolts.

5. A three-proof, fully enclosed frequency converter according to claim 4, characterized in that: The inverter assembly (200) also includes a decorative plate (209) fixedly connected to the side wall of the cover plate (104). The decorative plate (209) is sleeved on the side wall of the spring plunger (206), and the decorative plate (209) has a clearance hole structure in the middle for use with the explosion-proof glass plate (207).

6. A three-proof, fully enclosed frequency converter according to claim 5, characterized in that: An explosion-proof switch (210) is installed on the side wall of the cover plate (104), and the end of the explosion-proof switch (210) extends into the interior of the housing (102).

7. A three-proof, fully enclosed frequency converter according to claim 6, characterized in that: The bottom of the enclosure (102) is provided with a cable outlet for use with the inverter host (203), and an insulator (211) is fixedly connected to the inner side wall of the enclosure (102). The insulator (211) is installed on the bottom side wall of the inverter host (203).

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