Frequency conversion cabinet and frequency converter installed on frequency conversion cabinet

Abstract

The embodiment of the utility model relates to a frequency conversion cabinet, and discloses a frequency conversion cabinet and a frequency converter installed on the frequency conversion cabinet. According to the frequency conversion cabinet provided by the utility model, a fan is not arranged on a cabinet body; the whole cabinet is composed of a cabinet door, a cuboid cabinet body, a mounting bracket located at the bottom of the cabinet body and used for supporting the cabinet body to leave the ground surface, an air inlet located at the bottom of the cabinet body, an air outlet located on the right side face of the cabinet body, an air outlet located on the back face of the cabinet body and a frequency converter mounting area located in the cabinet body and used for mounting a frequency converter. When the frequency converter is installed in the frequency converter installation area, the air outlet located in the back face of the cabinet body is attached to the air outlet position of the frequency converter, and heat dissipation is rapidly completed through the unique structural design. The frequency converter has the advantages of small size, low cost and low fan noise, can excellently solve the heat dissipation problem of the frequency converter, and has no potential safety hazard.

Description

Technical Field

[0001] This utility model relates to frequency converter cabinets, and more particularly to a frequency converter cabinet and a frequency converter installed in the frequency converter cabinet. Background Technology

[0002] In most industrial applications, electric motors are a major source of energy consumption. Traditional motors often operate at a fixed speed, consuming significant amounts of electricity even when full speed is not required. Variable frequency drives (VFDs) can adjust the motor's speed according to actual needs, thus providing energy on demand and preventing waste. This energy-saving effect not only helps reduce operating costs for businesses but also aligns with modern society's requirements for energy conservation and emission reduction.

[0003] The use of frequency converters is an indispensable part of modern industrial production. They not only save energy and reduce consumption, improve production efficiency and product quality, but also protect motors and equipment, enable automation and intelligent upgrades, and adapt to complex operating conditions. Therefore, for industrial applications requiring precise control of motor speed and power, the use of frequency converters is of paramount importance.

[0004] With economic and social development, the use of high-power frequency converters is increasing. To meet the needs of application sites, circuit breakers, reactors, and other electrical components are usually installed upstream of the frequency converter. In field applications, high-power frequency converters are typically used in a cabinet together with other electrical components, for example... Figure 1a and Figure 1b The frequency converter cabinet shown has its door closed as follows: Figure 1a As shown, the inverter cabinet is in the following state after the cabinet door is removed: Figure 1b As shown, a traditional frequency converter cabinet is typically assembled from a cabinet body, a cabinet air inlet, and a top fan, with the frequency converter housed inside the cabinet.

[0005] The inventors discovered that this traditional frequency converter cabinet has at least the following problems: When a high-power frequency converter is running normally, it will generate a lot of heat. In order to dissipate the heat from the traditional cabinet, a fan is usually installed on the top of the traditional cabinet. This often results in problems such as large cabinet size, high operating noise, and high cost. However, if a fan is not installed on the traditional cabinet, the heat may not be dissipated in time, which may damage the electronic equipment or even cause safety hazards. Utility Model Content

[0006] The purpose of this utility model embodiment is to provide a frequency converter cabinet and a frequency converter installed in the frequency converter cabinet. The frequency converter cabinet can quickly complete heat dissipation through a unique structural design, which can not only meet the requirements of small size, low cost, and low fan noise, but also solve the heat dissipation problem of the frequency converter.

[0007] To solve the above-mentioned technical problems, an embodiment of this utility model provides a frequency converter cabinet, including: a cabinet door, a rectangular cabinet body, a mounting bracket located at the bottom of the cabinet body to support the cabinet body off the ground, an air inlet located at the bottom of the cabinet body, an air outlet located on the right side of the cabinet body, an air outlet located on the back of the cabinet body, and a frequency converter mounting area located inside the cabinet body for installing frequency converters; wherein, when a frequency converter is installed in the frequency converter mounting area, the air outlet located on the back of the cabinet body is in contact with the air outlet of the frequency converter.

[0008] An embodiment of this utility model also provides a frequency converter installed in a frequency converter cabinet, comprising: a heat sink, a power module assembly, a fan, and an air outlet; the power module assembly is located inside the frequency converter installed in the frequency converter cabinet, the heat sink is installed on the power module assembly, the fan is adjacent to the heat sink, and the air outlet is directly facing the airflow direction formed by the fan; wherein, the frequency converter installed in the frequency converter cabinet is installed in the frequency converter placement area in the frequency converter cabinet as described above.

[0009] Compared to related technologies, this utility model embodiment does not install a fan on the cabinet. The entire unit consists of a cabinet door, a rectangular cabinet body, a mounting bracket at the bottom of the cabinet to support the cabinet off the ground, an air inlet at the bottom of the cabinet, an air outlet on the right side of the cabinet, an air outlet on the back of the cabinet, and an inverter mounting area inside the cabinet for installing the inverter. The air outlet on the back of the cabinet, when the inverter is installed in the inverter mounting area, fits closely to the inverter's air outlet, and its unique structural design enables rapid heat dissipation. This achieves the goals of small size, low cost, low fan noise, excellent inverter heat dissipation, and no safety hazards.

[0010] In addition, the inverter cabinet also includes: signal input terminals, and an anti-backflow plate located on the back of the cabinet, below the air outlet on the back of the cabinet. When the anti-backflow plate is in the retracted state, its surface is parallel to the back of the cabinet and covers the air outlet on the back of the cabinet. When the anti-backflow plate is in the extended state, its surface is perpendicular to the back of the cabinet, preventing hot air from the air outlet on the back of the cabinet from flowing back into the cabinet through the air inlet at the bottom of the cabinet. The retracted state of the anti-backflow plate facilitates packaging and transportation, saving space. The extended state is the normal operating state of the inverter cabinet, effectively blocking hot air backflow. After installing this anti-backflow device, the temperature rise and fall are significantly reduced, by approximately 16%. Attached Figure Description

[0011] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0012] Figure 1a This is a schematic diagram of the external structure of a frequency converter cabinet provided in accordance with relevant technologies in this field;

[0013] Figure 1b This is a schematic diagram of the internal structure of a frequency converter cabinet provided in accordance with relevant technologies in this field;

[0014] Figure 2a This is a front view of the outer structure of a frequency converter cabinet according to an embodiment of the present utility model;

[0015] Figure 2b This is a schematic diagram of the outer side structure of a frequency converter cabinet according to an embodiment of the present utility model;

[0016] Figure 3 This is a schematic diagram of the inner structure of a frequency converter cabinet according to an embodiment of the present utility model;

[0017] Figure 4a This is a front view of the external structure of the frequency converter installed in the frequency converter cabinet according to an embodiment of the present utility model;

[0018] Figure 4b This is a schematic diagram of the back of the external structure of the frequency converter installed in the frequency converter cabinet according to an embodiment of the present utility model;

[0019] Figure 5 This is an exploded view of a frequency converter installed in a frequency converter cabinet according to an embodiment of the present utility model;

[0020] Figure 6a This is a front view of the structure of each guide plate of an air outlet according to an embodiment of the present utility model;

[0021] Figure 6b This is a side view of the structure of each guide plate of an air outlet according to an embodiment of the present utility model;

[0022] Figure 7 This is a schematic diagram of the hot air recirculation principle provided according to an embodiment of the present utility model;

[0023] Figure 8a This is a front view of the structure of a frequency converter cabinet with an anti-backflow plate according to an embodiment of the present utility model;

[0024] Figure 8b This is a schematic diagram of the back of a frequency converter cabinet with an anti-backflow plate according to an embodiment of the present utility model. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the various embodiments of this utility model will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been provided in the various embodiments of this utility model to enable the reader to better understand this utility model. However, the technical solutions claimed by this utility model can be implemented even without these technical details and various changes and modifications based on the following embodiments.

[0026] The division of the following embodiments is for ease of description and should not constitute any limitation on the specific implementation of this utility model. The various embodiments can be combined with or referenced by each other without contradiction.

[0027] The first embodiment of this utility model relates to a frequency converter cabinet, such as... Figure 2a , Figure 2b and Figure 3 As shown, including: Figure 2a The front view of the inverter cabinet shows: 1. Cabinet door; 2. Rectangular cabinet body; 3. Mounting bracket at the bottom of the cabinet to support the cabinet off the ground; 4. Air inlet at the bottom of the cabinet; 5. Air outlet on the right side of the cabinet; 6. ... (The text abruptly ends here, so the translation stops as well.) Figure 2b The schematic diagram of the back of the frequency converter cabinet shows the air outlet 5 located at the back of the cabinet and the frequency converter mounting area inside the cabinet. When a frequency converter is installed in the frequency converter mounting area, the air outlet at the back of the cabinet is flush with the air outlet of the frequency converter. When a frequency converter 6 is installed in the frequency converter mounting area, the interior of the frequency converter cabinet is as follows. Figure 3 As shown, the air inlet 3 at the bottom of the cabinet is directly below the frequency converter 6. It can be seen that in this embodiment of the invention, the height of the frequency converter cabinet is significantly reduced compared to traditional frequency converter cabinets, and no top-mounted fan is required, making it very suitable for airborne applications in the HVAC industry.

[0028] Since this utility model mainly focuses on the frequency converter cabinet for heat dissipation, in order to more intuitively explain the heat dissipation principle of this utility model, an example of a frequency converter paired with a frequency converter cabinet will be given here for explanation, such as... Figure 4a , Figure 4b , Figure 5 As shown, Figure 4a This is a front view of inverter 6. Figure 4b This is a schematic diagram of the back of inverter 6. Figure 5Exploded view of inverter 6. Inverter 6 includes: heat sink 7, power module assembly 8, inverter fan 9. Power module assembly 8 is inside inverter 6. Heat sink 7 is installed on top of power module assembly 8. Fan 9 is adjacent to heat sink 7. The air outlet is directly facing the airflow generated by fan 9. The air outlet is closely fitted with air outlet 5 located on the back of the cabinet.

[0029] When the inverter 6 is operating normally, the largest heat source is the power module assembly 8. The heat dissipation method for the power module assembly 8 is as follows: the power module assembly 8 is fixedly mounted on the heat sink 7. The heat generated by the power module assembly 8 is conducted to the heat sink 7, and then carried away from the inverter 6 by the fan 9, and this process repeats. This invention differs significantly from the traditional heat dissipation principle of inverter cabinets in that the inverter cabinet and the inverter 6 share a portion of the air duct; that is, the air outlet corresponding to the inverter fan 9 is directly attached to the back of the inverter cabinet, and the heat from the power module assembly 8 is directly dissipated outside the cabinet through the air outlet 5 located on the back of the cabinet. In one example, the overall air circulation process is as follows: cold air enters the cabinet through the air inlet 3 located at the bottom of the cabinet; a portion of the cold air enters the inverter 6, where the fan 9 generates airflow, continuously carrying away the heat generated by the power module assembly 8 through the heat sink 7, and then directly exhausting the air from the cabinet through the air outlet 5 located on the back of the cabinet. At this point, most of the heat inside the inverter cabinet 6 has been expelled from the cabinet through air circulation. Another portion of the heat enters the cabinet through the air inlet 3 at the bottom, carrying away the heat generated by other components (such as copper busbars, reactors, transformers, etc.) through the air outlet 4 on the right side of the cabinet. This invention greatly eliminates the need for a cabinet fan, enhances heat dissipation efficiency, and reduces costs.

[0030] To enhance the protection level of the inverter cabinet, in one example, a filter is installed at the air outlet 5 located at the rear of the cabinet; the angle between the surface of each guide plate of the air outlet 5 at the rear of the cabinet and the direction perpendicular to the ground is 135 degrees. The guide plates of the air outlet 5 at the rear of the cabinet are as follows... Figure 6a and Figure 6b As shown, Figure 6a This is a front view of each guide plate. Figure 6b This is a side view of the guide plate. It can be clearly seen that the angle between the surface of each guide plate and the direction perpendicular to the ground is 135 degrees, which improves the overall safety performance of the cabinet.

[0031] In one example, the air inlet 3 at the bottom of the cabinet, the air outlet 4 on the right side of the cabinet, and the air outlet 5 on the back of the cabinet are all rectangular in shape. This not only enhances the overall aesthetics but also maximizes airflow and improves heat dissipation while maintaining a high level of protection for the cabinet.

[0032] In one example, a straight line passing through the center point of the rectangular outline of the air inlet 3 located at the bottom of the cabinet intersects with a straight line passing through the center point of the rectangular outline of the air outlet 5 located at the back of the cabinet. This allows the air inlet 3 at the bottom of the cabinet to face the inverter mounting area, maximizing the amount of cool air entering the inverter 6 and improving heat dissipation.

[0033] Because hot air exhausted from the air outlet 5 located at the back of the cabinet may return to the cabinet through the air inlet 3 at the bottom, forming a hot air recirculation, the hot air recirculation is like... Figure 7 As shown, if some of the hot air discharged from the air outlet 5 located at the back of the cabinet flows back to the air inlet 3 at the bottom of the cabinet, it will cause heat accumulation, which will in turn cause the temperature of the 8 power module components to rise, affecting the performance of the frequency converter cabinet.

[0034] To minimize the impact of hot air recirculation on heat dissipation, in one example, the inverter cabinet also includes: an anti-backflow plate 10 located on the back of the cabinet, below the air outlet on the back of the cabinet; such as Figure 8a and Figure 8b As shown, the anti-backflow plate 10 has two states, one state as follows: Figure 8a As shown, when the anti-backflow plate 10 is in the retracted state, its surface is parallel to the back of the cabinet, and it covers the air outlet 5 located on the back of the cabinet. The retracted anti-backflow plate 10 facilitates packaging, transportation, and space saving. Another state is as follows... Figure 8b As shown, when the anti-backflow plate 10 is in the unfolded state, its surface is perpendicular to the back of the cabinet, preventing hot air from the air outlet 5 at the back of the cabinet from flowing back into the cabinet through the air inlet 3 at the bottom of the cabinet. The unfolded state of the anti-backflow plate 10 is the normal operating state of the frequency converter cabinet, thus blocking the backflow of hot air.

[0035] In one example, the anti-backflow plate 10 can be made of sheet metal or insulating material. Sheet metal material can enhance heat exchange with the outside environment and reduce the temperature of hot air as much as possible, while insulating material provides safety.

[0036] In one example, the anti-backflow plate 10 can be installed on the cabinet of the frequency converter cabinet by hinges, making it easy to unfold and retract; or it can be directly locked to the frequency converter cabinet by threads, making it easy to install.

[0037] Actual testing showed that after installing the anti-backflow plate 10 in this embodiment of the application, the temperature rise and fall of the power module assembly 8 was significant, decreasing by approximately 16%.

[0038] Compared to related technologies, this utility model embodiment does not install a fan on the cabinet. The entire unit consists of a cabinet door, a rectangular cabinet body, a mounting bracket at the bottom of the cabinet to support the cabinet off the ground, an air inlet at the bottom of the cabinet, an air outlet on the right side of the cabinet, an air outlet on the back of the cabinet, and an inverter mounting area inside the cabinet for installing the inverter. The air outlet on the back of the cabinet, when the inverter is installed in the inverter mounting area, fits closely to the inverter's air outlet, and its unique structural design enables rapid heat dissipation. This achieves the goals of small size, low cost, low fan noise, excellent inverter heat dissipation, and no safety hazards.

[0039] The second embodiment of this utility model relates to a frequency converter installed in a frequency converter cabinet, such as... Figure 4a , Figure 4b , Figure 5 As shown, Figure 4a This is a front view of inverter 6. Figure 4b This is a schematic diagram of the back of inverter 6. Figure 5 An exploded view of inverter 6. Inverter 6, installed in the inverter cabinet, includes: a heat sink 7, a power module assembly 8, and an inverter fan 9. The power module assembly 8 is located inside the inverter 6. The heat sink 7 is mounted on top of the power module assembly 8. The fan 9 is adjacent to the heat sink 7, with its air outlet directly facing the airflow direction. The air outlet is in close contact with the air outlet 5 located on the back of the cabinet. The inverter installed in the inverter cabinet is located in the inverter placement area of ​​the inverter cabinet described in the first embodiment.

[0040] In one example, a thermally conductive material is coated between the heat sink 7 and the power module assembly 8 to fill the gap between them. Since the power module assembly 8 is fixedly mounted on the heat sink 7, coating the gap between them with thermally conductive material further facilitates heat dissipation.

[0041] Compared with related technologies, the frequency converter provided in this embodiment of the present invention is installed in the frequency converter cabinet provided in the aforementioned embodiment. Therefore, it also has the same technical effects as those provided in the aforementioned embodiment, and will not be described in detail here.

[0042] Those skilled in the art will understand that the above embodiments are specific embodiments for implementing the present invention, and in practical applications, various changes can be made to them in form and detail without departing from the spirit and scope of the present invention.

Claims

1. A frequency converter cabinet, characterized in that, include: Cabinet door, rectangular cabinet body, mounting bracket at the bottom of the cabinet body to support the cabinet body off the ground, air inlet at the bottom of the cabinet body, air outlet on the right side of the cabinet body, air outlet at the back of the cabinet body, and inverter mounting area inside the cabinet body for installing inverters. Wherein, the air outlet located on the back of the cabinet is in contact with the air outlet of the frequency converter when the frequency converter is installed in the frequency converter placement area.

2. The frequency converter cabinet according to claim 1, characterized in that, The frequency converter cabinet also includes: an anti-backflow plate located on the back of the cabinet and below the air outlet on the back of the cabinet; When the anti-backflow plate is in the retracted state, the surface of the anti-backflow plate is parallel to the back of the cabinet, and the surface of the anti-backflow plate will cover the air outlet located on the back of the cabinet. When the anti-backflow plate is in the unfolded state, the surface of the anti-backflow plate is perpendicular to the back of the cabinet, which is used to prevent hot air from the air outlet at the back of the cabinet from flowing back into the interior of the cabinet through the air inlet located at the bottom of the cabinet.

3. The frequency converter cabinet according to claim 2, characterized in that, The anti-backflow plate is made of sheet metal or insulating material.

4. The frequency converter cabinet according to claim 1, characterized in that, The air outlet located at the back of the cabinet is equipped with a filter; The angle between the surface of each guide plate of the air outlet located on the back of the cabinet and the direction perpendicular to the ground is 135 degrees.

5. The frequency converter cabinet according to any one of claims 1 to 4, characterized in that, The air inlet located at the bottom of the cabinet, the air outlet located on the right side of the cabinet, and the air outlet located on the back of the cabinet are all rectangular in shape.

6. The frequency converter cabinet according to claim 5, characterized in that, The straight line passing through the center point of the rectangular outline of the air inlet located at the bottom of the cabinet intersects with the straight line passing through the center point of the rectangular outline of the air outlet located at the back of the cabinet.

7. A frequency converter installed in a frequency converter cabinet, characterized in that, include: Heat sink, power module assembly, fan, air outlet; The power module assembly is located inside the frequency converter installed in the frequency converter cabinet, the heat sink is installed on the power module assembly, the fan is adjacent to the heat sink, and the air outlet is directly facing the airflow direction formed by the fan. The frequency converter installed in the frequency converter cabinet is installed in the frequency converter placement area in the frequency converter cabinet as described in any one of claims 1 to 6.

8. The frequency converter installed in the frequency converter cabinet according to claim 7, characterized in that, A thermally conductive material is coated between the heat sink and the power module assembly, and the thermally conductive material is used to fill the gap between the heat sink and the power module assembly.

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