Frequency conversion assembly and power distribution cabinet

Abstract

The utility model belongs to the technical field of electrical equipment, and discloses a frequency conversion assembly and a power distribution cabinet, the frequency conversion assembly comprises a frequency converter and a frame, and the frequency converter comprises a main loop assembly and a control loop assembly; the frame is arranged on the frequency converter, a first air duct and a second air duct which are arranged side by side in the first direction are formed between the frame and the frequency converter and are separated from each other, the main loop assembly is exposed in the first air duct, and the control loop assembly is exposed in the second air duct. According to the frequency conversion assembly provided by the utility model, heat is taken away by the main loop assembly through air in the first air channel, heat is taken away by the control loop assembly through air in the second air channel, heat dissipation between the main loop assembly and the control loop assembly is not influenced mutually, temperature rise of the control loop assembly caused by the main loop assembly is reduced, and a frequency converter has a good heat dissipation effect; and the phenomena of shutdown, high-temperature alarm and insulation aging of the frequency converter are effectively prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical equipment, in particular to a frequency conversion component and a power distribution cabinet. Background Art

[0002] Frequency converters are widely used in industrial motors such as cranes, textile and chemical fibers, oil and gas drilling, metallurgy, coal, building materials, etc. Among them, in order to save energy, the motor needs to be frequency-converted and speed-regulated by a frequency converter. The internal devices of the frequency converter are mainly divided into two parts: the main circuit and the control circuit. Among them, the main circuit is the main heat-generating part of the frequency converter.

[0003] At present, in order to protect the safe and reliable operation of the internal electronic equipment of the frequency converter from interference such as dust, dripping water, impact, solar radiation, and electromagnetism, the frequency converter is usually installed in a power distribution cabinet for protection. However, the space in the power distribution cabinet is narrow and the frequency converter itself also has a shell. A large amount of heat will be generated when the main circuit works for a long time. If the heat is not discharged out of the cabinet in time, it will cause the temperature rise of the main circuit and the control circuit to be too high. Especially, the control circuit is sensitive to the temperature rise. In the long run, the frequency converter is prone to problems such as shutdown, high-temperature alarm, and insulation aging. Summary of the Utility Model

[0004] An object of the utility model is to provide a frequency conversion component to solve the heat dissipation problem of the frequency converter.

[0005] To achieve the above object, the utility model adopts the following technical solutions:

[0006] Provide a frequency conversion component, including:

[0007] A frequency converter, including a main circuit component and a control circuit component;

[0008] A frame is arranged on the frequency converter. A first air duct and a second air duct are formed between the frame and the frequency converter and are arranged side by side in a first direction. The first air duct and the second air duct are separated from each other. The main circuit component is exposed in the first air duct, and the control circuit component is exposed in the second air duct.

[0009] Optionally, the first air duct includes a first air outlet, a second air outlet and a first air inlet. The first air outlet is arranged in a second direction and is located at the top of the frequency converter. The second air outlet is arranged in the first direction on one side of the first air outlet. The first air inlet is arranged at the bottom of the frequency converter.

[0010] Optionally, it further includes:

[0011] A first air outlet cover is communicated with the first air outlet. The first air outlet cover includes a first fan and a first filter element arranged on the air outlet side of the first fan;

[0012] The second air outlet hood is communicatively arranged with the second air outlet. The second air outlet hood includes a second fan and a second filter element arranged on the air outlet side of the second fan;

[0013] The air inlet hood is communicatively arranged with the first air inlet. The air inlet hood includes a third filter element.

[0014] Optionally, the air inlet hood further includes a first hood body communicatively connected to the first air inlet and a second hood body communicatively connected to the first hood body. The second hood body and the frequency converter are arranged on the same side of the first hood body along the second direction, and a plurality of the third filter elements are arranged on the side of the first hood body and the second hood body facing away from the second air duct along the first direction.

[0015] Optionally, the frame includes at least one first enclosure panel. A first air duct is formed between the first enclosure panel and the frequency converter. When there are a plurality of first enclosure panels arranged side by side along the second direction, adjacent two first enclosure panels can be connected by a first cross beam.

[0016] Optionally, the second air duct includes a third air outlet and a second air inlet. The third air outlet is arranged at the top of the frequency converter, and the second air inlet is arranged at the bottom of the frequency converter.

[0017] Optionally, it further includes a third air outlet hood communicatively arranged with the third air outlet. The third air outlet hood includes a third fan and a fourth filter element arranged on the air outlet side of the third fan.

[0018] Optionally, the frame includes:

[0019] Two second enclosure panels are respectively arranged on both sides of the frequency converter along the third direction;

[0020] A third enclosure panel is arranged along the first direction on the side of the second enclosure panel facing away from the first air duct;

[0021] A deflector is arranged at the bottom of the third enclosure panel. A second air duct is formed between the second enclosure panel, the third enclosure panel, the deflector and the frequency converter.

[0022] Another object of the present utility model is to provide a power distribution cabinet, including a cabinet body and the frequency conversion component described in any one of the above, and the frequency conversion component is arranged in the cabinet body.

[0023] Optionally, a cabinet door is arranged on the cabinet body, and a fifth filter element is arranged on the cabinet door. The fifth filter element is oppositely arranged with the second air inlet of the second air duct.

[0024] Beneficial effects:

[0025] The frequency conversion component provided by the present utility model has a first air duct and a second air duct arranged side by side in a first direction between the frame and the frequency converter to separately dissipate heat from the main circuit component and the control circuit component. Among them, the heat of the main circuit component is taken away by the air in the first air duct, and the heat of the control circuit component is taken away by the air in the second air duct. The heat dissipation between the two does not affect each other, which is beneficial to reducing the temperature rise caused by the main circuit component to the control circuit component, enabling the frequency converter to have a good heat dissipation effect, and effectively preventing the frequency converter from experiencing phenomena such as shutdown, high-temperature alarm, and insulation aging.

[0026] The power distribution cabinet provided by the present utility model enables the frequency converter to have a good heat dissipation effect through the arrangement of the frequency conversion component. Description of the Drawings

[0027] Figure 1 is a schematic diagram of the air flow direction inside the frequency conversion component provided by the present utility model;

[0028] Figure 2 is a schematic structural diagram of the frequency conversion component provided by the present utility model;

[0029] Figure 3 is an exploded view of the structure of the frequency conversion component provided by the present utility model;

[0030] Figure 4 is a schematic structural diagram of the first air outlet cover provided by the present utility model;

[0031] Figure 5 is an exploded view of a part of the structure of the frequency conversion component provided by the present utility model;

[0032] Figure 6 is a schematic structural diagram of the air inlet cover provided by the present utility model;

[0033] Figure 7 is another exploded view of a part of the structure of the frequency conversion component provided by the present utility model.

[0034] In the figure:

[0035] 100, frequency converter; 101, first air duct; 1011, first air outlet; 1012, second air outlet; 1013, first air inlet; 102, second air duct; 1021, third air outlet; 1022, second air inlet;

[0036] 200, frame; 210, first enclosing plate; 220, first cross beam; 230, second enclosing plate; 240, third enclosing plate; 250, flow guiding plate;

[0037] 300, first air outlet cover; 310, first fan; 320, first filter element; 330, support plate; 340, top cover;

[0038] 400. Second air outlet hood; 410. Second fan; 420. Second filter element;

[0039] 500. Air outlet perimeter plate;

[0040] 600. Air inlet hood; 610. Third filter element; 620. First hood body; 621. First hood plate; 622. Second hood plate; 630. Second hood body; 631. Second cross beam;

[0041] 700. Third air outlet hood; 710. Third fan; 720. Fourth filter element; 730. Third hood body;

[0042] 800. Fifth filter element. Detailed implementation manners

[0043] The present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. Additionally, it should be noted that for the convenience of description, only the parts related to the present utility model rather than all the structures are shown in the drawings.

[0044] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0045] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "above the top of", and "on the top of" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "below the bottom of", and "under the bottom of" the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicating that the horizontal height of the first feature is lower than that of the second feature.

[0046] In the description of this embodiment, the terms "upper", "lower", "right", and other orientation or position relationships are based on the orientation or position relationship shown in the drawings. They are only for convenience of description and simplifying the operation, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0047] Referring to Figure 1 and Figure 2 As shown, this embodiment provides a frequency conversion component, which includes a frequency converter 100 and a frame 200.

[0048] Specifically, the frequency converter 100 includes a main circuit component (not shown) and a control circuit component (not shown); the frame 200 is provided on the frequency converter 100, and a first air duct 101 and a second air duct 102 are formed between the frame 200 and the frequency converter 100 and arranged side by side in the first direction. The first air duct 101 and the second air duct 102 are separated from each other. The main circuit component is exposed in the first air duct 101, and the control circuit component is exposed in the second air duct 102. Among them, the a direction in the figure is the first direction, and the first direction can be the front-back direction of the frequency converter 100. Exemplarily, the first air duct 101 is located behind the frequency converter 100, and the second air duct 102 is located in front of the frequency converter 100. Among them, the solid arrow in the figure is the air flow direction of the first air duct 101, and the dashed arrow is the air flow direction of the second air duct 102. Among them, the main circuit component includes power devices, such as a rectifying unit, a high-capacity capacitor, and an inverting unit; the control circuit component includes control devices, such as an arithmetic circuit, a voltage and current detection circuit, a driving circuit, and a protection circuit. The specific structures and connection relationships of the main circuit component and the control circuit component are prior arts, and the present application will not elaborate too much.

[0049] In this embodiment, a first air duct 101 and a second air duct 102 are formed between the frame 200 and the frequency converter 100 and arranged side by side in the first direction to separately dissipate heat from the main circuit component and the control circuit component. Among them, the heat of the main circuit component is taken away by the air in the first air duct 101, and the heat of the control circuit component is taken away by the air in the second air duct 102. The heat dissipation between the two does not affect each other, which is beneficial to reducing the temperature rise caused by the main circuit component to the control circuit component, enabling the frequency converter 100 to have a good heat dissipation effect, and effectively preventing the frequency converter 100 from experiencing shutdown, high-temperature alarm, and insulation aging phenomena. In addition, through the design of the first air duct 101 and the second air duct 102, even if there is no fan in the frequency converter 100, it still has a good heat dissipation effect.

[0050] In a feasible implementation, the main circuit assembly includes a heat dissipation component (not shown), and the heat dissipation component is exposed in the first air duct 101. The power devices of the main circuit assembly exchange heat with the air in the first air duct 101 through the heat dissipation component, which can accelerate the heat dissipation of the main circuit assembly. Among them, the heat dissipation component can be a fin structure to ensure the air circulation in the first air duct 101.

[0051] In this embodiment, referring to Figures 1 to 5 As shown, the first air duct 101 includes a first air outlet 1011 and a second air outlet 1012. The first air outlet 1011 is arranged along the second direction and is provided at the top of the frequency converter 100, and the second air outlet 1012 is arranged along the first direction on one side of the first air outlet 1011. Among them, the b direction in the figure is the second direction, the second direction is the up and down direction of the frequency converter 100, the upper end of the frequency converter 100 is the top, and the lower end of the frequency converter 100 is the bottom. Exemplarily, the second air outlet 1012 can be arranged behind the frequency converter 100 and located in the upper area of the frequency converter 100. In this embodiment, through the settings of the first air outlet 1011 and the second air outlet 1012, the heat dissipation of the main circuit assembly can be accelerated.

[0052] Specifically, the frequency conversion assembly further includes a first air outlet hood 300 and a second air outlet hood 400. Among them, the first air outlet hood 300 is communicated with the first air outlet 1011, and the first air outlet hood 300 includes a first fan 310 and a first filter element 320 arranged on the air outlet side of the first fan 310. The second air outlet hood 400 is communicated with the second air outlet 1012, and the second air outlet hood 400 includes a second fan 410 and a second filter element 420 arranged on the air outlet side of the second fan 410. In this embodiment, when the first fan 310 works, it can make the air in the first air duct 101 flow through the first filter element 320 and then be discharged; when the second fan 410 works, it can make the air in the second air duct 102 flow through the second filter element 420 and then be discharged. Among them, through the settings of the first filter element 320 in the first air outlet hood 300 and the second filter element 420 in the second air outlet hood 400, dust and water vapor are effectively prevented from entering the first air duct 101. The first air outlet hood 300 is arranged at the top of the frequency conversion assembly, and the second air outlet hood 400 is arranged behind the frequency conversion assembly. The air outlets of the two do not affect each other, enabling the frequency converter 100 to have a good heat dissipation effect and improving the structural compactness of the frequency conversion assembly.

[0053] Exemplarily, the first fan 310 and the second fan 410 can be selectively started as long as the ventilation volume in the first air duct 101 meets the ventilation requirements of the main circuit assembly.

[0054] Exemplarily, from the perspective of spatial layout, the heat dissipation effect of the first air outlet 1011 is better than that of the second air outlet 1012. Therefore, the power of the first fan 310 can be greater than that of the second fan 410, so that the air volume at the first filter element 320 is greater than the air volume at the second filter element 420, that is, the total amount of hot air discharged through the first air outlet hood 300 in the first channel is greater than the total amount of hot air discharged through the second air outlet hood 400 in the second channel.

[0055] Exemplarily, the first fan 310 includes but is not limited to a DC fan or an AC fan. For example, a 24V DC fan or a 48V DC fan, among which the DC fan has the advantages of low noise and large ventilation volume. Exemplarily, at least one first fan 310 is provided, such as four or six.

[0056] Exemplarily, the second fan 410 includes but is not limited to a DC fan or an AC fan. For example, a 24V DC fan or a 48V DC fan. Exemplarily, at least one second fan 410 is provided, such as two or four.

[0057] In this embodiment, the first fan 310 can be a 48V DC fan, and the second fan 410 can be a 24V DC fan, which can save energy while meeting the heat dissipation of the main circuit components.

[0058] Exemplarily, the first filter element 320 and the second filter element 420 can be low-smoke and halogen-free flame-retardant filters, and the protection level can be IP55 or lower than IP55.

[0059] Exemplarily, the first filter element 320 and the second filter element 420 can also adopt a combined structure of a stainless steel wire mesh with a pressing plate for dust prevention and a sheet metal protective cover for waterproofing.

[0060] Exemplarily, at least one first filter element 320 and at least one second filter element 420 are provided.

[0061] In a feasible implementation manner, an air outlet surrounding plate 500 is provided at the first air outlet 1011. The first air outlet hood 300 further includes a support plate 330. The first fan 310 and the first filter element 320 are arranged on the support plate 330, and a seal is formed between the support plate 330 and the air outlet surrounding plate 500, which is convenient for the assembly of the first air outlet hood 300. Among them, a plurality of support plates 330 can be provided and arranged around the first air outlet 1011.

[0062] Exemplarily, a plurality of first filter elements 320 are provided, and a top cover 340 is provided on the side of the first filter element 320 facing away from the support plate 330 along the second direction. A filter cavity is enclosed between the support plate 330, the first filter element 320 and the top cover 340, and the air outlet of the first fan 310 is communicated with the filter cavity.

[0063] Exemplarily, the second filter element 420 can be provided in one-to-one correspondence with the second fan 410.

[0064] In this embodiment, referring to Figure 2 and Figure 5 as shown, the frame 200 includes a first enclosing plate 210, and a first air duct 101 is formed between the first enclosing plate 210 and the frequency converter 100. Among them, the first enclosing plate 210 is located behind the frequency converter 100. Among them, at least one first enclosing plate 210 is provided. Exemplarily, a plurality of first enclosing plates 210 are provided and arranged side by side in the second direction, and adjacent two first enclosing plates 210 can be connected by a first cross beam 220 to ensure the structural stability of the first enclosing plate 210. Among them, the first enclosing plate 210 at the top is used to support the second air outlet hood 400 and form a seal with the second air outlet hood 400.

[0065] Exemplarily, for the convenience of assembly, the frame 200 can include two first enclosing plates 210.

[0066] Exemplarily, a seal is formed between the second air outlet hood 400, the support plate 330 and the air outlet enclosing plate 500 to simplify the structure of the frequency conversion assembly and facilitate assembly.

[0067] In this embodiment, referring to Figure 1 、 Figure 2 、 Figure 3 and Figure 6 as shown, the first air duct 101 further includes a first air inlet 1013, and the first air inlet 1013 is provided at the bottom of the frequency converter 100. In this embodiment, cold air can be introduced into the first air inlet 1013, and the cold air can squeeze the hot air in the first air duct 101 upward and discharge it through the first air outlet 1011 and the second air outlet 1012. That is, while the cold air exchanges heat with the main circuit component, the hot air in the first air duct 101 can be discharged as much as possible.

[0068] Specifically, the frequency conversion assembly further includes an air inlet hood 600 communicated with the first air inlet 1013. The air inlet hood 600 includes a third filter element 610. The cold air enters the air inlet hood 600 from the third filter element 610, flows through the first air duct 101, and then is discharged through the first air outlet 1011 and the second air outlet 1012. The third filter element 610 effectively prevents dust and water vapor from entering the first air duct 101.

[0069] Exemplarily, the third filter element 610 can be a low-smoke and halogen-free flame-retardant filter, and the protection level can be IP55, or can be lower than IP55.

[0070] Exemplarily, the third filter element 610 can also adopt a combined structure of a stainless steel wire mesh with a pressing plate for dust prevention and a sheet metal protective cover for waterproofing.

[0071] Exemplarily, at least one third filter element 610 may be provided.

[0072] In a feasible implementation, the air inlet hood 600 further includes a first hood body 620 communicating with the first air inlet 1013 and a second hood body 630 communicating with the first hood body 620. The second hood body 630 and the frequency converter 100 are disposed on the same side of the first hood body 620 along the second direction, and a plurality of third filter elements 610 are provided on the side of the first hood body 620 and the second hood body 630 facing away from the second air duct 102 along the first direction. In this embodiment, through the arrangement of the second hood body 630, the amount of cold air entering the air inlet hood 600 can be increased, which is beneficial to the heat dissipation of the main circuit components. And the second hood body 630 and the frequency converter 100 are disposed on the same side of the first hood body 620 along the second direction, which can improve the structural compactness of the frequency conversion components. Among them, the plurality of third filter elements 610 may be arranged in a matrix.

[0073] Exemplarily, the second hood body 630 includes a second cross beam 631, and the second cross beam 631 may form a seal between the frequency converter 100 and the first enclosure 210 at the bottom to simplify the structure of the frequency conversion components.

[0074] In this embodiment, with reference to Figure 1 、 Figure 2 、 Figure 3 and Figure 7 as shown, the second air duct 102 includes a third air outlet 1021 and a second air inlet 1022. The third air outlet 1021 is disposed at the top of the frequency converter 100, and the second air inlet 1022 is disposed at the bottom of the frequency converter 100. In this embodiment, cold air may be introduced into the second air inlet 1022, and the cold air may squeeze the hot air in the second air duct 102 upward and discharge it through the third air outlet 1021. That is, while the cold air exchanges heat with the control circuit components, the hot air in the second air duct 102 can be discharged as much as possible.

[0075] In a feasible implementation, the frequency conversion components further include a third air outlet hood 700. The third air outlet hood 700 is communicated with the third air outlet 1021. The third air outlet hood 700 includes a third fan 710 and a fourth filter element 720 disposed on the air outlet side of the third fan 710. In this embodiment, when the third fan 710 operates, the air in the second air duct 102 can flow through the fourth filter element 720 and then be discharged. Among them, through the arrangement of the fourth filter element 720 in the third air outlet hood 700, dust and water vapor are effectively prevented from entering the second air duct 102. In addition, the third air outlet hood 700 is disposed at the front side of the frequency conversion components, the second air outlet hood 400 is disposed at the rear side of the frequency conversion components, and the first air outlet hood 300 is disposed at the top of the frequency conversion components. The air outlets of the three do not affect each other, so that the frequency converter 100 has a good heat dissipation effect and the structural compactness of the frequency conversion components can be improved.

[0076] In this embodiment, the third air outlet hood 700 may include a plurality of third hood bodies 730, and at least one third fan 710, for example, two third fans 710, is provided on each third hood body 730; and the third hood bodies 730 and the fourth filter elements 720 are arranged in one-to-one correspondence.

[0077] Exemplarily, the third fan 710 includes, but is not limited to, a DC fan or an AC fan. For example, a 24V DC fan or a 48V DC fan.

[0078] Exemplarily, the fourth filter element 720 may be a low-smoke and halogen-free flame-retardant filter, and the protection level may be IP55 or lower than IP55.

[0079] Exemplarily, the fourth filter element 720 may also adopt a combined structure of a stainless steel wire mesh with a pressing plate for dust prevention and a sheet metal protective cover for waterproofing.

[0080] In a feasible implementation manner, an industrial air conditioner (not shown) may be provided on the front side of the frequency conversion assembly. The industrial air conditioner discharges cold air downward toward the second air inlet 1022. After the cold air enters the second air duct 102, it is then sucked out above the industrial air conditioner, and so on, to achieve the effect of cooling the control components.

[0081] Specifically, a fifth filter element 800 is provided at the second air inlet 1022. The fifth filter element 800 may be disposed on the side facing away from the first air duct 101 along the first direction, that is, the third filter element 610 and the fifth filter element 800 are disposed opposite to each other along the first direction. The cold air entering the first air duct 101 and the cold air entering the second air duct 102 do not interfere with each other, which can improve the structural compactness of the frequency conversion assembly.

[0082] Exemplarily, at least one fifth filter element 800 may be provided. When a plurality of fifth filter elements 800 are provided, the plurality of fifth filter elements 800 may be arranged in a matrix.

[0083] Exemplarily, the fifth filter element 800 may be a low-smoke and halogen-free flame-retardant filter, and the protection level may be IP55 or lower than IP55.

[0084] Exemplarily, the fifth filter element 800 may also adopt a combined structure of a stainless steel wire mesh with a pressing plate for dust prevention and a sheet metal protective cover for waterproofing.

[0085] In this embodiment, with reference to Figure 7As shown, the frame 200 includes a second shroud 230 and a third shroud 240. A second air duct 102 is formed between the second shroud 230, the third shroud 240 and the frequency converter 100. Among them, two second shrouds 230 are respectively disposed on both sides of the frequency converter 100 along the third direction, and the third shroud 240 is disposed along the first direction on the side of the second shroud 230 facing away from the first air duct 101, that is, the third shroud 240 is disposed on the front side of the second shroud 230. In this embodiment, since the control circuit assembly is disposed in the upper region of the frequency converter 100, both the second shroud 230 and the third shroud 240 are disposed in the upper region of the frequency converter 100.

[0086] Further, to lead the second air inlet 1022 to the bottom of the frequency converter 100, the frame 200 further includes a deflector 250. The deflector 250 is disposed at the bottom of the third shroud 240. A second air duct 102 is formed among the second shroud 230, the third shroud 240, the deflector 250 and the frequency converter 100. Among them, the fifth filter element 800 is located at the bottom of the deflector 250. The cold air entering the second air inlet 1022 is deflected by the deflector 250 to the control circuit assembly of the second air duct 102.

[0087] This embodiment also provides a power distribution cabinet. The power distribution cabinet includes a cabinet body (not shown) and the above-mentioned frequency conversion assembly. The frequency conversion assembly is disposed in the cabinet body. In this embodiment, through the setting of the frequency conversion assembly, the frequency converter 100 has a good heat dissipation effect.

[0088] Specifically, the second filter element 420 and the third filter element 610 can be disposed on the cabinet body.

[0089] Specifically, the second air outlet hood 400 and the first air inlet hood 600 can be docked with the cabinet body. Exemplarily, as Figure 6 shown, the first hood body 620 includes first cover plates 621 oppositely arranged along the third direction, and a second cover plate 622 connected to the two first cover plates 621. The second cover plate 622 is located in front of the first cover plates 621. The bottoms of the first cover plates 621 and the second cover plate 622 are docked with the cabinet body, and the tops of the first cover plates 621 and the second cover plate 622 are docked with the frequency converter 100 to form a seal, guiding the cold air flowing through the third filter element 610 to the first air duct 101.

[0090] Specifically, a cabinet door (not shown) is provided on the cabinet body. The fourth filter element 720 can be disposed on the upper part of the cabinet door, and the fifth filter element 800 can be disposed on the lower part of the cabinet door for easy replacement.

[0091] It can be understood that for the connection methods not clearly described in the text, common connection methods such as threaded connection, welding or bonding can be selected according to needs.

[0092] Obviously, the above embodiments of the present utility model are merely examples for clearly illustrating the present utility model, rather than limitations on the implementation manners of the present utility model. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present utility model. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the claims of the present utility model.

Claims

1. A frequency conversion component, characterized in that: include: A frequency converter (100) comprising a main circuit component and a control circuit component; A frame (200) is arranged on the frequency converter (100); a first air duct (101) and a second air duct (102) arranged side by side along a first direction are formed between the frame (200) and the frequency converter (100); the first air duct (101) and the second air duct (102) are separated from each other; the main circuit component is exposed in the first air duct (101), and the control circuit component is exposed in the second air duct (102).

2. The frequency conversion component according to claim 1, characterized in that: The first air duct (101) comprises a first air outlet (1011), a second air outlet (1012) and a first air inlet (1013); the first air outlet (1011) is arranged along the second direction and is arranged at the top of the inverter (100); the second air outlet (1012) is arranged along the first direction at one side of the first air outlet (1011); and the first air inlet (1013) is arranged at the bottom of the inverter (100).

3. The frequency conversion component according to claim 2, characterized in that: Also includes: A first air outlet cover (300) is arranged in communication with the first air outlet (1011), wherein the first air outlet cover (300) comprises a first fan (310) and a first filter element (320) arranged on the air outlet side of the first fan (310); A second air outlet cover (400) is arranged in communication with the second air outlet (1012), wherein the second air outlet cover (400) comprises a second fan (410) and a second filter element (420) arranged on the air outlet side of the second fan (410); An air inlet cover (600) is connected to the first air inlet (1013), and the air inlet cover (600) includes a third filter element (610).

4. The frequency conversion component according to claim 3, characterized in that: The air inlet cover (600) also includes a first cover body (620) connected to the first air inlet (1013) and a second cover body (630) connected to the first cover body (620), the second cover body (630) and the inverter (100) are arranged on the same side of the first cover body (620) along the second direction, and a plurality of the third filter elements (610) are provided on the side of the first cover body (620) and the second cover body (630) facing away from the second air duct (102) along the first direction.

5. The frequency conversion component according to claim 1, characterized in that: The frame (200) comprises at least one first enclosure (210), wherein the first air duct (101) is formed between the first enclosure (210) and the frequency converter (100), and when a plurality of first enclosures (210) are provided and arranged side by side along the second direction, two adjacent first enclosures (210) can be connected via a first crossbeam (220).

6. The frequency conversion component according to claim 1, characterized in that: The second air duct (102) comprises a third air outlet (1021) and a second air inlet (1022); the third air outlet (1021) is arranged at the top of the inverter (100), and the second air inlet (1022) is arranged at the bottom of the inverter (100).

7. The frequency conversion component according to claim 6, characterized in that: It also includes a third air outlet cover (700) which is connected to the third air outlet (1021), and the third air outlet cover (700) includes a third fan (710) and a fourth filter element (720) arranged on the air outlet side of the third fan (710).

8. The frequency conversion component according to claim 1, characterized in that: The framework (200) comprises: Two second enclosure plates (230) are provided and are arranged one-to-one on both sides of the frequency converter (100) along the third direction; A third enclosing plate (240) is arranged along a first direction on a side of the second enclosing plate (230) facing away from the first air duct (101); The guide plate (250) is arranged at the bottom of the third enclosure (240), and the second air duct (102) is formed between the second enclosure (230), the third enclosure (240), the guide plate (250) and the inverter (100).

9. A power distribution cabinet, characterized in that: It comprises a cabinet and a frequency conversion component as described in any one of claims 1 to 8, wherein the frequency conversion component is arranged in the cabinet.

10. The power distribution cabinet according to claim 9, characterized in that: The cabinet body is provided with a cabinet door, and the cabinet door is provided with a fifth filter element (800), and the fifth filter element (800) is arranged opposite to the second air inlet (1022) of the second air duct (102).

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