Narrow-body frequency converter

Abstract

The utility model discloses a narrow-body frequency converter, which relates to the technical field of frequency converters and aims to solve the problem of poor heat dissipation effect of the frequency converter, the frequency converter comprises a box body, an air duct is arranged in the middle of the box body along the height direction of the box body, a plurality of through holes are arranged on two sides of the air duct, an air inlet is arranged at the bottom of the box body, and an air outlet is arranged at the top of the box body. The fan assembly is movably arranged at the bottom of the air duct, the rectification assembly is arranged on one side of the air duct and is close to the fan assembly, the capacitor assembly is arranged on the other side of the air duct and is arranged corresponding to the rectification assembly, the inversion assembly is arranged on the top of the capacitor assembly, and the rectification assembly, the capacitor assembly and the inversion assembly are all arranged in cooperation with the through hole. The DC reactor is arranged on the top of the rectification assembly and is arranged corresponding to the inversion assembly.

Description

Technical Field

[0001] The utility model relates to the technical field of frequency converters, and more specifically to a narrow-body frequency converter. Background Art

[0002] The inverter is an electric energy control device that uses the on-off function of power semiconductor devices to convert industrial frequency power into another frequency power. It is widely used in the control of AC motors. As the operating voltage and power of the inverter increase, the volume of the voltage converter and the number of power units included in the inverter will increase accordingly.

[0003] A frequency converter is a device that controls the power of a motor by changing the frequency of the motor power supply. Most existing traditional frequency converters have a flat structural layout, with the air duct at the bottom of the chassis. The air duct is relatively long, and the closer the heat-generating device is to the air outlet, the poorer the heat dissipation effect.

[0004] Therefore, how to solve the problem of poor heat dissipation effect of the inverter is an urgent problem to be solved by those skilled in the art. Utility Model Content

[0005] In view of this, the purpose of the utility model is to provide a narrow-body inverter with an independent air duct designed in the middle of the inverter. The heating elements are located on both sides of the independent air duct in an up-and-down layout, which helps to reduce the air resistance in the air duct, thereby reducing the loss of air volume and enhancing the heat dissipation effect.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A narrow-body frequency converter, comprising:

[0008] The box body has an air duct in the middle, which is arranged along the height direction of the box body. A plurality of through holes are arranged on both sides of the air duct. The bottom of the box body is an air inlet, and the top of the box body is an air outlet.

[0009] A fan assembly is movably arranged at the bottom of the air duct;

[0010] The rectifier assembly is arranged at one side of the air duct and close to the fan assembly, and the rectifier assembly is arranged in cooperation with the through hole;

[0011] The capacitor component is arranged on the other side of the air duct and is arranged corresponding to the rectifier component, and the capacitor component is arranged in cooperation with the through hole;

[0012] The inverter component is arranged on the top of the capacitor component and is arranged in cooperation with the through hole;

[0013] The DC reactor is arranged on the top of the rectifier component and is arranged corresponding to the inverter component.

[0014] Preferably, the air duct is arranged to expand gradually from the top to the bottom of the box.

[0015] Preferably, the capacitor assembly includes a plurality of coaxially arranged capacitors, the plurality of capacitors are arranged in cooperation with the through holes, and a capacitor mounting sleeve is provided around the circumference of the capacitor.

[0016] Preferably, the rectifying assembly comprises:

[0017] The rectifier unit is fixed to the box;

[0018] The rectifier radiator is connected to the rectifier unit, and the rectifier radiator is matched with the through hole.

[0019] Preferably, the inverter assembly includes:

[0020] The inverter unit is fixed to the box;

[0021] The inverter radiator is connected to the inverter unit, and the inverter radiator is matched with the through hole.

[0022] Preferably, a wiring cavity is provided at the inner bottom of the box body, and the wiring cavity is located at the bottom of the fan assembly.

[0023] Preferably, the DC reactor is fixed to the top of the box body by means of a mounting sheet metal, and an opening is provided on the mounting sheet metal.

[0024] The narrow-body inverter provided by the utility model comprises a box body, a fan assembly, a rectifier assembly, a capacitor assembly, an inverter assembly and a DC reactor. Specifically, an air duct is provided in the middle of the box body, the air duct is arranged along the height direction of the box body, a plurality of through holes are arranged on both sides of the air duct, the bottom of the box body is an air inlet, and the top of the box body is an air outlet. The fan assembly is movably arranged at the bottom of the air duct, which is convenient for maintenance and replacement of the fan assembly. The rectifier assembly is arranged at one side of the air duct and is arranged close to the fan assembly. The capacitor assembly is arranged at the other side of the air duct and is arranged corresponding to the rectifier assembly. The inverter assembly is arranged at the top of the capacitor assembly. The rectifier assembly, the capacitor assembly and the inverter assembly are all arranged in coordination with the through holes. The DC reactor is arranged at the top of the rectifier assembly and is arranged corresponding to the inverter assembly. The rectifier assembly, the capacitor assembly, the inverter assembly and the DC reactor are distributed on both sides of the air duct and cooperate with the through holes on the air duct to form a closed independent air duct, and are arranged on both sides of the air duct in an up-and-down structure, which helps to reduce the air resistance in the air duct, thereby reducing the loss of air volume and enhancing the heat dissipation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0026] Figure 1 A schematic diagram of the structure of the narrow-body inverter provided by the utility model;

[0027] Figure 2 A partial schematic diagram of a narrow-body inverter provided by the utility model;

[0028] Figure 3 This is a cross-sectional view of the narrow-body inverter provided by the utility model.

[0029] Figure 1-Figure 3 , the reference numerals include:

[0030] 1- box body, 11- wiring cavity;

[0031] 2- Air duct;

[0032] 3- fan assembly;

[0033] 4-rectifier assembly, 41-rectifier unit, 42-rectifier radiator;

[0034] 5-capacitor assembly;

[0035] 6-inverter assembly, 61-inverter unit, 62-inverter radiator;

[0036] 7-DC reactor. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0038] It should be noted that the directional words such as "upper" and "lower" mentioned below are defined based on the drawings in the specification.

[0039] The core of the utility model is to provide a narrow-body inverter, with an independent air duct 2 designed in the middle of the inverter. The heating elements are located on both sides of the independent air duct 2 in an up-and-down layout, which helps to reduce the air resistance in the air duct 2, thereby reducing the loss of air volume and enhancing the heat dissipation effect.

[0040] Please refer to Figure 1 A narrow-body inverter includes a box body 1, a fan component 3, a rectifier component 4, a capacitor component 5, an inverter component 6 and a DC reactor 7.

[0041] Specifically, the middle part of the box body 1 has an air duct 2, the air duct 2 is arranged along the height direction of the box body 1, and a plurality of through holes are arranged on both sides of the air duct 2. The bottom of the box body 1 is an air inlet, and the top of the box body 1 is an air outlet. The fan assembly 3 is movably arranged at the bottom of the air duct 2, which is convenient for maintenance and replacement of the fan assembly 3. The rectifier assembly 4 is arranged on one side of the air duct 2 and is arranged close to the fan assembly 3. The capacitor assembly 5 is arranged on the other side of the air duct 2 and is arranged corresponding to the rectifier assembly 4. The inverter assembly 6 is arranged on the capacitor assembly 5. At the top of the air duct 2, the rectifier assembly 4, the capacitor assembly 5 and the inverter assembly 6 are all arranged in cooperation with the through hole, the DC reactor 7 is arranged on the top of the rectifier assembly 4 and corresponds to the inverter assembly 6, the rectifier assembly 4, the capacitor assembly 5, the inverter assembly 6 and the DC reactor 7 are distributed on both sides of the air duct 2 and cooperate with the through holes on the air duct 2 to form a closed independent air duct 2, and are arranged on both sides of the air duct 2 in an upper and lower structure, which helps to reduce the air resistance in the air duct 2, thereby reducing the loss of air volume and enhancing the heat dissipation effect.

[0042] The fan assembly 3 is located at the bottom of the box body 1 and adopts a drawer-type structure design. In addition, pluggable terminals are selected on the fan assembly 3 to facilitate the disassembly, assembly and maintenance of the fan assembly 3.

[0043] The narrow-body inverter configured in the above manner adopts a three-sided structural design. An independent air duct 2 is designed in the middle of the inverter. The heating elements are located on both sides of the independent air duct 2 in an up-and-down layout. The entire air duct 2 is short, which helps to reduce the air resistance in the air duct 2, thereby reducing the loss of air volume and enhancing the heat dissipation effect.

[0044] In the above embodiment, the air duct 2 is arranged to expand gradually from the top to the bottom of the box body 1 .

[0045] It should be noted that the bottom width of the air duct 2 is large and the top width is small, so that the wind from the fan assembly 3 can pass through the rectifier assembly 4 and the capacitor assembly 5 and smoothly reach the inverter assembly 6 and the DC reactor 7 on the top. The large bottom width of the air duct 2 can reduce the obstruction to the wind of the fan assembly 3, so that more wind can blow the inverter assembly 6 and the DC reactor 7 on the top, thereby enhancing the heat dissipation effect of each component.

[0046] Among them, in this embodiment, the air duct 2 is configured in this way, but in actual life, there is no limitation to this, as long as the above technical effects can be achieved.

[0047] In the above situation, the capacitor assembly 5 includes a plurality of coaxially arranged capacitors, the plurality of capacitors are arranged in cooperation with the through holes, and a capacitor mounting sleeve is provided around the capacitor to seal the gap between the capacitor and the through hole.

[0048] It is understandable that the capacitor assembly 5 is disposed close to the air outlet of the fan assembly 3 to give priority to heat dissipation of the capacitor assembly 5 so as to increase the life of the capacitor assembly 5 .

[0049] Furthermore, the rectifier assembly 4 includes a rectifier unit 41 and a rectifier radiator 42 . The rectifier unit 41 is fixed to the housing 1 . The rectifier radiator 42 is connected to the rectifier unit 41 . The rectifier radiator 42 is arranged in cooperation with the through hole.

[0050] It should be noted that the rectifier unit 41 may be a rectifier, which is arranged near the air outlet of the fan assembly 3, and the rectifier radiator 42 discharges the heat generated by the rectifier during operation through the air duct 2. The fin gap of the rectifier radiator 42 is rationally designed, which does not affect the heat dissipation of the rectifier and the capacitor assembly 5, and also ensures the heat dissipation of the inverter assembly 6 and the DC reactor 7. The above-mentioned rectifier unit 41 may also be other types of rectifier equipment, rectifier elements, etc.

[0051] In the above embodiment, the inverter assembly 6 includes an inverter unit 61 and an inverter heat sink 62. The inverter unit 61 is fixed to the box body 1. The inverter heat sink 62 is connected to the inverter unit 61. The inverter heat sink 62 is arranged in cooperation with the through hole.

[0052] It is understandable that the inverter unit 61 is an inverter, and the inverter heat sink 62 discharges the heat generated by the inverter during operation through the air duct 2 to achieve efficient heat dissipation of the inverter. The inverter unit 61 may also be other types of inverter devices, inverter elements, etc.

[0053] On the basis of the above embodiment, a wiring cavity 11 is provided at the inner bottom of the box body 1 , and the wiring cavity 11 is located at the bottom of the fan assembly 3 .

[0054] It should be noted that by providing the wiring cavity 11 in the box body 1, the cables can be stored in an orderly manner.

[0055] In the above embodiment, the DC reactor 7 is fixed to the top of the box body 1 by means of a mounting sheet metal, and an opening is provided on the mounting sheet metal.

[0056] It is understandable that there are openings at the bottom of the mounting sheet metal to facilitate heat dissipation of the DC reactor 7 .

[0057] In summary, the narrow-body inverter provided by the utility model adopts a three-sided layout structural design. An independent air duct 2 is designed in the middle position of the inverter. The heating elements are located on both sides of the independent air duct 2 in an up and down layout. The entire air duct 2 is short, which helps to reduce the air resistance in the air duct 2, thereby reducing the loss of air volume and enhancing the heat dissipation effect.

[0058] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0059] The narrow-body inverter provided by the utility model is introduced in detail above. This article uses specific examples to illustrate the principle and implementation method of the utility model. The description of the above embodiment is only used to help understand the method and core idea of ​​the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A narrow-body inverter, characterized in that: include: A box (1), wherein the middle part of the box (1) is provided with an air duct (2), the air duct (2) is arranged along the height direction of the box (1), a plurality of through holes are arranged on both sides of the air duct (2), the bottom of the box (1) is an air inlet, and the top of the box (1) is an air outlet; A fan assembly (3) is movably arranged at the bottom of the air duct (2); A rectifying assembly (4) is arranged at one side of the air duct (2) and close to the fan assembly (3), and the rectifying assembly (4) is arranged in coordination with the through hole; A capacitor component (5) is arranged on the other side of the air duct (2) and is arranged corresponding to the rectifier component (4), and the capacitor component (5) is arranged in coordination with the through hole; An inverter component (6) is arranged on the top of the capacitor component (5) and is arranged in cooperation with the through hole; A direct current reactor (7) is arranged on the top of the rectifier assembly (4) and is arranged corresponding to the inverter assembly (6).

2. The narrow-body inverter according to claim 1, characterized in that: The air duct (2) is arranged to expand gradually from the top to the bottom of the box body (1).

3. The narrow-body inverter according to claim 2, characterized in that: The capacitor assembly (5) comprises a plurality of coaxially arranged capacitors, the plurality of capacitors being arranged in cooperation with the through holes, and a capacitor mounting sleeve being arranged around the circumference of the capacitor.

4. The narrow-body inverter according to claim 3, characterized in that: The rectifying assembly (4) comprises: A rectifier unit (41) fixed to the box (1); A rectifier heat sink (42) is connected to the rectifier unit (41), and the rectifier heat sink (42) is arranged in cooperation with the through hole.

5. The narrow-body inverter according to claim 4, characterized in that: The inverter assembly (6) comprises: An inverter unit (61) fixed to the box (1); An inverter heat sink (62) is connected to the inverter unit (61), and the inverter heat sink (62) is arranged in coordination with the through hole.

6. The narrow-body inverter according to claim 5, characterized in that: A wiring cavity (11) is provided at the inner bottom of the box body (1), and the wiring cavity (11) is located at the bottom of the fan assembly (3).

7. The narrow-body inverter according to any one of claims 1 to 6, characterized in that: The DC reactor (7) is fixed to the top of the box (1) via a mounting sheet metal, and an opening is provided on the mounting sheet metal.

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