A frequency converter

Abstract

The utility model relates to the technical field of frequency converter discloses a frequency converter, including frequency converter rear housing, control mainboard, the outer edge of frequency converter rear housing has the front shell cover of activity clamping, the back of frequency converter rear housing is provided with the heat dissipation subassembly, the surface center of frequency converter rear housing is equipped with the mounting groove, is provided with the mounting assembly between mounting groove and control mainboard, the mounting assembly includes the fixed frame, the connecting seat, the back of fixed frame is fixedly connected in the inner wall of mounting groove, the front of connecting seat is fixedly connected in the back of control mainboard, in the utility model, through mounting assembly, utilize fixed frame, connecting seat, buffer guide rod, spring, exhaust fan, heat conduction piece, realize the shock attenuation protection of control mainboard, guarantee its operation stability, accelerate air circulation in mounting groove simultaneously, fast conduction and take away control mainboard heat, avoid its damage because of overheating, improve frequency converter whole operation reliability and heat dissipation efficiency.

Description

Technical Field

[0001] This utility model relates to the field of frequency converter technology, and in particular to a frequency converter. Background Technology

[0002] In the field of industrial production and automation control, frequency converters are key equipment for achieving motor speed regulation and energy-saving control.

[0003] A frequency converter is a power control device that uses frequency conversion technology and microelectronics to control the speed of an AC motor by changing the frequency and amplitude of the motor's power supply. The core of a frequency converter consists of a rectifier unit, a filter unit, an inverter unit, and a control unit. It first rectifies and filters the industrial frequency AC power into DC power, and then converts it into AC power with adjustable frequency and voltage through the inverter unit to achieve motor speed regulation. The operating stability and heat dissipation performance of the frequency converter directly affect the working efficiency and service life of the overall system.

[0004] While existing frequency converters achieve basic frequency conversion control functions, their heat dissipation structures are often simplistic, relying on basic ventilation holes or single heat dissipation components. This makes it difficult to quickly dissipate the large amounts of heat generated during operation, potentially leading to overheating and malfunctions in core components such as the internal control board, thus affecting operational stability. Furthermore, they lack effective shock absorption and protection mechanisms. In environments with vibrations during equipment transportation, installation, or operation, internal components are easily damaged by impacts, shortening the equipment's lifespan. Additionally, some frequency converters struggle to balance enclosure protection with heat dissipation; excessive protection hinders heat dissipation, while optimized heat dissipation may reduce the effectiveness of protection. Therefore, this paper proposes a new frequency converter to address these issues. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a frequency converter, which aims to solve the problems of existing frequency converters, such as the single heat dissipation structure leading to overheating of core components, lack of effective shock absorption protection causing easy damage to components, and difficulty in simultaneously achieving the functions of casing protection and heat dissipation.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a frequency converter, including a frequency converter rear shell and a control main board, wherein a front shell cover is movably snapped onto the outer edge of the frequency converter rear shell, a heat dissipation assembly is provided on the back of the frequency converter rear shell, and a mounting groove is provided at the center of the outer surface of the frequency converter rear shell, and a mounting assembly is provided between the mounting groove and the control main board.

[0007] The mounting assembly includes a mounting bracket and a connecting seat. The back of the mounting bracket is fixedly connected to the inner wall of the mounting groove, and the front of the connecting seat is fixedly connected to the back of the control board. A buffer guide rod is movably engaged between the mounting bracket and the connecting seat. A spring is sleeved and connected to the outer side of the buffer guide rod. An exhaust fan is fixedly connected to the back of the connecting seat, and a heat-conducting plate is fixedly connected to the inner side of the connecting seat.

[0008] As a further description of the above technical solution:

[0009] Two fixing brackets are provided, and the two fixing brackets are mirror images of each other along the central axis of the mounting groove.

[0010] As a further description of the above technical solution:

[0011] The buffer guide rods are provided in multiple ways, and the multiple buffer guide rods are distributed at equal intervals along the length direction of both sides of the surface of the fixing frame and the connecting seat.

[0012] As a further description of the above technical solution:

[0013] The exhaust fan is provided in two parts, and the two exhaust fans are mirrored along the central axis of the connecting seat.

[0014] As a further description of the above technical solution:

[0015] The surface of the heat-conducting sheet is attached to the back of the control motherboard.

[0016] As a further description of the above technical solution:

[0017] The heat dissipation assembly includes heat dissipation fins. The outer wall of the heat dissipation fins is fixedly connected to the inner surface of the back of the inverter housing. Multiple heat dissipation fins are provided and are distributed at equal intervals.

[0018] As a further description of the above technical solution:

[0019] A heat dissipation groove is formed between the inner wall of the heat dissipation fin and the inner wall of the mounting groove, and a heat dissipation fan is fixedly connected to the upper surface of the heat dissipation fin.

[0020] As a further description of the above technical solution:

[0021] The top and both sides of the front cover are provided with several heat dissipation holes.

[0022] This utility model has the following beneficial effects:

[0023] 1. In this utility model, by installing components, using a fixing frame, connecting seat, buffer guide rod, spring, exhaust fan, and heat conduction plate, the control main board is protected against shock and vibration, ensuring its operational stability. At the same time, it accelerates the air circulation in the installation groove, quickly conducts and removes the heat from the control main board, preventing it from being damaged due to overheating, and improving the overall operational reliability and heat dissipation efficiency of the frequency converter.

[0024] 2. In this utility model, the internal components of the frequency converter are physically protected by the front cover and heat dissipation components, heat dissipation fins, heat dissipation slots and heat dissipation fans. At the same time, the heat generated by the operation of the frequency converter is efficiently dissipated by means of air convection, increasing the heat exchange area and forced air flow, thereby enhancing the overall heat dissipation performance and ensuring the stable operation of the frequency converter. Attached Figure Description

[0025] Figure 1 This is a three-dimensional front view of the frequency converter proposed in this utility model;

[0026] Figure 2 This is a rear-view three-dimensional schematic diagram of a frequency converter proposed in this utility model;

[0027] Figure 3 This is a schematic diagram of the structure for removing the front cover at the rear housing of a frequency converter according to the present invention.

[0028] Figure 4 This is a partial cross-sectional view of the heat dissipation assembly at the mounting groove of the inverter rear housing of the inverter proposed in this utility model.

[0029] Figure 5 This is a schematic diagram showing the disassembled structure of the control board and mounting components of a frequency converter proposed in this utility model.

[0030] Legend:

[0031] 1. Inverter rear housing; 2. Front housing; 3. Heat dissipation assembly; 31. Heat dissipation fins; 32. Heat dissipation slots; 33. Cooling fan; 4. Mounting groove; 5. Control main board; 6. Mounting assembly; 61. Fixing bracket; 62. Connecting seat; 63. Buffer guide rod; 64. Spring; 65. Exhaust fan; 66. Heat conduction plate. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] Reference Figures 2-4 This utility model provides an embodiment of a frequency converter, including a rear housing 1 and a control main board 5. A front cover 2 is movably attached to the outer edge of the rear housing 1. The top and sides of the front cover 2 have several heat dissipation holes. The front cover 2 provides physical protection for the internal components of the frequency converter, while the heat dissipation holes on its top and sides allow for air convection, aiding in heat dissipation. A heat dissipation assembly 3 is provided on the back of the rear housing 1. The heat dissipation assembly 3 includes heat dissipation fins 31, the outer walls of which are fixedly connected to the inner surface of the back of the rear housing 1. Multiple heat dissipation fins 31 are provided, and the multiple heat dissipation fins 31 are evenly distributed. The multiple evenly spaced heat dissipation fins 31 greatly increase the surface area for heat exchange and effectively improve the rate of heat dissipation. A heat dissipation groove 32 is opened between the inner wall of the heat dissipation fin 31 and the inner wall of the mounting groove 4. The heat dissipation groove 32 provides space for heat flow and facilitates the conduction of heat from the fins to the external environment. A cooling fan 33 is fixedly connected to the upper surface of the heat dissipation fin 31. The cooling fan 33 can quickly remove the heat on the heat dissipation fin 31 by forcing airflow, thereby enhancing the overall heat dissipation performance.

[0034] Reference Figure 1 , Figure 3 and Figure 5 A mounting groove 4 is provided at the center of the outer surface of the inverter's rear housing 1. A mounting assembly 6 is provided between the mounting groove 4 and the control main board 5. The mounting assembly 6 includes a fixing bracket 61 and a connecting seat 62. The back of the fixing bracket 61 is fixedly connected to the inner wall of the mounting groove 4. There are two fixing brackets 61, which are mirror images of each other along the central axis of the mounting groove 4. The front of the connecting seat 62 is fixedly connected to the back of the control main board 5. A buffer guide rod 63 is movably engaged between the fixing bracket 61 and the connecting seat 62. There are multiple buffer guide rods 63, which are evenly distributed along the length direction of both sides of the surface of the fixing bracket 61 and the connecting seat 62. A spring 64 is sleeved and connected to the outer side of the buffer guide rod 63. The combination of 63 and spring 64 can effectively buffer external vibration and impact, providing shock absorption and protection for the control motherboard 5 and ensuring its operational stability. Two exhaust fans 65 are fixedly connected to the back of the connector 62. The two exhaust fans 65 are mirrored along the central axis of the connector 62. The two exhaust fans 65 work together to accelerate the air circulation inside the mounting groove 4 and remove the heat around the control motherboard 5 in time. A heat-conducting plate 66 is fixedly connected to the inner side of the connector 62. The surface of the heat-conducting plate 66 is attached to the back of the control motherboard 5. The heat-conducting plate 66 has good thermal conductivity and can quickly conduct the heat generated by the control motherboard 5 to other heat dissipation components, preventing the control motherboard 5 from being damaged due to overheating.

[0035] Working principle: When the frequency converter is running, the control board 5 will generate a lot of heat. First, the heat conduction plate 66 attached to the back of the control board 5 will play its role. Its good heat conduction performance will quickly absorb the heat of the control board 5 and conduct it to the connector 62. At the same time, the two exhaust fans 65 on the back of the connector 62 are mirrored along the central axis and rotate together to accelerate the air circulation inside the mounting groove 4, so as to timely exhaust the heat conducted by the heat conduction plate 66 and the heat around the control board 5, and avoid the heat from accumulating in the mounting groove 4.

[0036] For the mounting component 6, the mounting bracket 61 is fixed to the inner wall of the mounting groove 4, and the connecting seat 62 is connected to the control main board 5. The multiple buffer guide rods 63 and the springs 64 sleeved on the outside of the two are movably connected to form a buffer structure. When the frequency converter is subjected to vibration, the buffer guide rods 63 and the springs 64 can effectively buffer the vibration impact, play a shock absorption and protection role for the control main board 5, ensure its operation in a stable environment, and indirectly facilitate the stable dissipation of heat.

[0037] Looking at the heat dissipation component 3, the multiple equally spaced heat dissipation fins 31 on the back of the inverter's rear housing 1 greatly increase the surface area for heat exchange. After heat is transferred from inside the inverter to the heat dissipation fins 31, the heat dissipation grooves 32 between the inner wall of the heat dissipation fins 31 and the inner wall of the mounting groove 4 provide a channel for heat flow, facilitating heat conduction from the fins to the external environment. At the same time, the cooling fans 33 on the upper surface of the heat dissipation fins 31 force airflow, quickly carrying away the heat from the heat dissipation fins 31, thus enhancing the overall heat dissipation performance.

[0038] In addition, the front cover 2 is movably attached to the outer edge of the rear cover 1 of the inverter, providing physical protection for the internal components of the inverter. Furthermore, several ventilation holes on its top and sides allow for air convection, aiding in heat dissipation. This, combined with the heat dissipation functions of the heat dissipation components 3 and 6, forms a multi-dimensional heat dissipation system, ensuring that the inverter maintains a suitable operating temperature during operation and guaranteeing its stable and efficient operation.

[0039] In summary, the inverter achieves efficient heat dissipation and stable operation through the shock absorption and protection of the mounting component 6, the local heat dissipation of the heat conduction plate 66 and the exhaust fan 65, the centralized heat dissipation of the heat dissipation fins 31 and the heat dissipation fan 33, and the auxiliary heat dissipation of the heat dissipation holes of the front cover 2.

[0040] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A frequency converter, comprising a rear casing (1) and a control mainboard (5), characterized in that: The front cover (2) is movably snapped onto the outer edge of the inverter rear housing (1). A heat dissipation component (3) is provided on the back of the inverter rear housing (1). An installation groove (4) is provided at the center of the outer surface of the inverter rear housing (1). An installation component (6) is provided between the installation groove (4) and the control main board (5). The mounting assembly (6) includes a mounting bracket (61) and a connecting seat (62). The back of the mounting bracket (61) is fixedly connected to the inner wall of the mounting groove (4). The front of the connecting seat (62) is fixedly connected to the back of the control main board (5). A buffer guide rod (63) is movably engaged between the mounting bracket (61) and the connecting seat (62). A spring (64) is sleeved and connected to the outer side of the buffer guide rod (63). An exhaust fan (65) is fixedly connected to the back of the connecting seat (62). A heat-conducting plate (66) is fixedly connected to the inner side of the connecting seat (62).

2. The frequency converter according to claim 1, characterized in that: Two fixing brackets (61) are provided, and the two fixing brackets (61) are mirrored along the central axis of the mounting groove (4).

3. The frequency converter according to claim 1, characterized in that: The buffer guide rods (63) are provided in multiple ways, and the multiple buffer guide rods (63) are distributed at equal intervals along the length direction on both sides of the surface of the fixing frame (61) and the connecting seat (62).

4. A frequency converter according to claim 1, characterized in that: Two exhaust fans (65) are provided, and the two exhaust fans (65) are mirrored along the central axis of the connecting seat (62).

5. A frequency converter according to claim 1, characterized in that: The surface of the heat-conducting sheet (66) is attached to the back of the control motherboard (5).

6. A frequency converter according to claim 1, characterized in that: The heat dissipation assembly (3) includes heat dissipation fins (31). The outer wall of the heat dissipation fins (31) is fixedly connected to the inner surface of the back of the inverter rear shell (1). There are multiple heat dissipation fins (31), and the multiple heat dissipation fins (31) are distributed at equal intervals.

7. A frequency converter according to claim 6, characterized in that: A heat dissipation groove (32) is provided between the inner wall of the heat dissipation fin (31) and the inner wall of the mounting groove (4), and a heat dissipation fan (33) is fixedly connected to the upper surface of the heat dissipation fin (31).

8. A frequency converter according to claim 1, characterized in that: The front cover (2) has several heat dissipation holes on its top and sides.

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