CN219918690U - Frequency converter cabinet - Google Patents

Abstract

The utility model discloses a frequency converter cabinet. The frequency converter cabinet includes a cabinet, a partition and a cooling fan unit; the cabinet includes a power distribution unit cabinet and a frequency conversion power unit cabinet arranged side by side, and the power distribution unit cabinet and the frequency conversion power unit are arranged side by side. Ventilation openings are provided on the connected sides of the cabinets. The power distribution unit cabinet and the frequency conversion power unit cabinet both have oppositely arranged bottoms and tops, as well as oppositely arranged front and rear parts; partitions separate the power distribution unit cabinets and the frequency conversion power unit. The space of the cabinet is divided into two chambers, the front and rear. The chamber at the rear is provided with an air inlet at the bottom and an air outlet at the top. The airflow enters through the air inlet and is blown out from the air outlet after passing through the chamber. The technical solution of this utility model is that the partition board inverter cabinet is divided into two chambers at the front and rear. The reactor is installed in the rear chamber, which can block the noise of the reactor from being transmitted to the front of the cabinet and also provide heat insulation. It has the effect of ventilation, flow and heat dissipation.

Description

Inverter cabinet

Technical field

The utility model relates to the technical field of frequency converters, in particular to a frequency converter cabinet.

Background technique

With the continuous improvement of industrial automation, the special requirements for power supply of various production equipment are also increasing. Since the frequency converter can adjust the voltage and frequency of the output power supply, it is widely used to adjust the power of the motor and realize variable speed operation of the motor. The frequency converter cabinet is a support device for controlling frequency conversion operations of electrical appliances. It can protect electrical appliances, reduce the impact on the external power grid, and make equipment and systems safer.

Among existing products, most high-power frequency converter cabinets adopt a forward air intake method, that is, an air inlet is provided on the front door panel of the cabinet for air intake, and an exhaust fan located on the top of the cabinet is used for exhaust to achieve heat dissipation. Since the filter module of the frequency converter generates a lot of heat and requires good ventilation and heat dissipation, it is often installed in the cabinet near the front door. However, the filter module includes a reactor, capacitor and its own cooling fan. The reactor itself can easily generate noise due to vibration. It is transmitted to the outside of the cabinet through the air inlet, and the cooling fan of the filter module itself will also increase the noise, causing the problem of loud noise.

Utility model content

The main purpose of the utility model is to propose a frequency converter cabinet, which is designed to reduce the noise of the frequency converter cabinet and ensure the heat dissipation effect.

In order to achieve the above purpose, the frequency converter cabinet proposed by this utility model includes:

Cabinet body, the cabinet body includes a power distribution unit cabinet and a frequency conversion power unit cabinet arranged side by side. A ventilation opening is provided on the side where the power distribution unit cabinet and the frequency conversion power unit cabinet are connected. The power distribution unit cabinet Both the frequency conversion power unit cabinet and the frequency conversion power unit cabinet have oppositely arranged bottoms and tops, as well as oppositely arranged front and rear parts. The bottom of the power distribution unit cabinet is provided with a first air inlet, and the top is provided with an air outlet. The frequency conversion unit cabinet is provided with an air outlet. A second air inlet is provided at the bottom of the power unit cabinet; and

A partition is provided in the power distribution unit cabinet and the frequency conversion power unit cabinet in the vertical direction to separate the space of the power distribution unit cabinet and the frequency conversion power unit cabinet into adjacent areas. The front chamber of the front part and the rear chamber close to the rear part, the rear chamber of the power distribution unit cabinet and the rear chamber of the frequency conversion power unit cabinet pass through the The vents are connected, the rear cavity of the power distribution unit cabinet is used to install reactors and/or transformers, and the rear cavity of the frequency conversion power unit cabinet is used to install reactors and/or transformers.

Optionally, the partition includes a first partition and a second partition, and the first partition and the second partition are respectively provided in the power distribution unit cabinet and the frequency conversion power unit cabinet, The space of the power distribution unit cabinet is divided into a first chamber near the front and a second chamber near the rear, and the frequency conversion power unit cabinet is divided into a first chamber near the front. A third chamber and a fourth chamber near the rear. The first air inlet is provided at the bottom of the second chamber. The air outlet is provided at the top of the second chamber. The fourth chamber A second air inlet is provided at the bottom of the chamber, the first chamber and the third chamber are used to install power units and other devices, and the second chamber and the fourth chamber are used to install reactances. converter and/or transformer.

Optionally, the frequency converter cabinet further includes a cooling fan unit, which is provided at the air outlet to drive air flow from the first air inlet and the second air inlet through the distribution outlet. The rear chamber of the electrical unit cabinet and the frequency conversion power unit cabinet is blown out from the air outlet.

Optionally, the frequency converter cabinet further includes a mounting plate, which is provided in the second chamber and extends along a horizontal plane, and the reactor is installed on a surface of the mounting plate facing the top. , the transformer is located at the bottom position forming the second chamber.

Optionally, the mounting plate is connected to the inner wall surface of the second chamber at its periphery to divide the second chamber into an upper chamber and a lower chamber, and the reactor is provided on the upper chamber. In the chamber, the transformer is located in the lower chamber, and the mounting plate is provided with a ventilation hole connecting the upper chamber and the lower chamber.

Optionally, the mounting plate is provided with a plurality of ventilation holes, and the plurality of ventilation holes are arranged at intervals on the mounting plate.

Optionally, the frequency converter cabinet further includes a wind hood, the wind hood is provided on the mounting plate, the wind hood is formed with an air dispersion duct, and one end opening of the air dispersion duct is connected to the ventilation hole. , the other end is connected to the air outlet, and the reactor is located in the air dispersion duct.

Optionally, the frequency converter cabinet further includes an air inlet grill covering the first air inlet and the second air inlet.

Optionally, the cooling fan unit includes a plurality of fans, one or more air outlets are provided on the top, and a plurality of the air outlets are spaced on the top.

Optionally, the cooling fan unit further includes a fan cover, the fan cover has heat dissipation holes, and the fan cover is provided outside the fan.

The technical solution of the utility model divides the power distribution unit cabinet and the frequency conversion power unit cabinet into two front and rear chambers through partitions, that is, the front chamber near the front of the cabinet and the rear chamber near the rear of the cabinet. . Install power units, such as rectifiers, inverter units, etc., in the front chamber; install reactors, transformers, etc. in the rear chamber; since noise is mainly emitted by reactors, set the reactor in the third chamber at the rear of the cabinet. In the rear chamber, the partition can prevent the noise from the reactor from being transmitted to the front of the cabinet, and also plays a role in heat insulation. In conjunction with the heat dissipation ventilation duct from the bottom to the top of the cabinet, a first air inlet is provided at the bottom of the rear chamber, and an air outlet is provided at the top, so that cold air can enter from the bottom of the cabinet and absorb heat through the interior of the cabinet. The air outlet on the top is discharged, and the rear chambers of the power distribution unit cabinet and the frequency conversion power unit cabinet are connected through the connected vents, so that the rear chambers of the power distribution unit cabinet and the frequency conversion power unit cabinet can share the heat dissipation ventilation channel. The ventilation of the variable frequency power unit cabinet can drive the power distribution unit cabinet and achieve the effect of ventilation, flow and heat dissipation at the same time.

Description of the drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description These are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without exerting creative efforts.

Figure 1 is a schematic structural diagram of the front side of the inverter cabinet of the present invention;

Figure 2 is a schematic structural diagram of the back side of the inverter cabinet of the present invention;

Figure 3 is a partial enlarged view of the mounting plate in the inverter cabinet in Figure 2;

Figure 4 is a schematic structural diagram of multiple cabinets of the utility model inverter arranged side by side;

Figure 5 is a partially enlarged schematic diagram of the ventilation opening at the connection between two adjacent cabinets in the frequency converter in Figure 4.

Explanation of reference numbers:

label name label name 1 Inverter cabinet 10 Cabinet 11 Power distribution unit cabinet 111 first chamber 113 second chamber 113a first air inlet 113b Air outlet 13 Frequency conversion power unit cabinet 131 third chamber 133 fourth chamber 133a Second air inlet 15 vents 30 Partition 31 first partition 33 second partition 50 Cooling fan unit 51 fan 60 fan cover 61 Vents 70 mounting plate 71 Vents 80 wind cover 81 Dispersion channel 90 air intake grille 2 Power unit 3 Reactor 4 transformer

The realization of the purpose, functional features and advantages of the present utility model will be further described with reference to the embodiments and the accompanying drawings.

Detailed ways

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

It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), then the directional indications are only used to explain the position of a certain posture (as shown in the accompanying drawings). (shown) relative positional relationship, movement, etc. between the components. If the specific posture changes, the directional indication will also change accordingly.

In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as instructions or instructions. implying its relative importance or implicitly specifying the quantity of the technical feature indicated. Therefore, features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In addition, the technical solutions in various embodiments can be combined with each other, but it must be based on the realization by those of ordinary skill in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that such a combination of technical solutions does not exist. , nor is it within the protection scope required by this utility model.

The utility model proposes a frequency converter cabinet 1.

In the embodiment of the present utility model, as shown in Figures 1 and 2, the frequency converter cabinet 1 includes a cabinet 10 and a partition 30; the cabinet includes a power distribution unit cabinet 11 and a frequency conversion power unit cabinet 13 arranged side by side. The power distribution unit cabinet 11 and the frequency conversion power unit cabinet 13 are connected with a vent 15 on the side. Both the power distribution unit cabinet 11 and the frequency conversion power unit cabinet 13 have oppositely arranged bottoms and tops, as well as oppositely arranged front and rear parts. The bottom of the power distribution unit cabinet 11 is provided with a first air inlet 113a, and the top is provided with an air outlet 113b. The bottom of the variable frequency power unit cabinet 13 is provided with a second air inlet 133a; the partition 30 is provided on the distribution unit in the vertical direction. In the power unit cabinet 11 and the variable frequency power unit cabinet 13, the space of the power distribution unit cabinet 11 and the variable frequency power unit cabinet 13 is divided into a front chamber near the front and a rear chamber near the rear. The power distribution unit The rear chamber of the cabinet 11 and the rear chamber of the variable frequency power unit cabinet 13 are connected through the vent 15. The rear chamber of the power distribution unit cabinet 11 is used to install the reactor 3 and/or transformer 4. The variable frequency power unit cabinet The rear chamber of 13 is used to install reactor 3 and/or transformer 4.

The bottom of the rear cavity of the power distribution unit cabinet 11 is provided with a first air inlet 113a, and the top is provided with an air outlet 113b. The bottom of the rear cavity of the frequency conversion power unit cabinet 13 is provided with a second air inlet 133a, and is located at the rear. A fan is set at the top of the rear chamber. When the fan is turned on, the wind is drawn from the first air inlet 113a at the bottom of the rear chamber of the power distribution unit cabinet 11 to the air outlet 113b, and then flows out from the cabinet through the air outlet 113b. When the cabinets are combined, the air is drawn from the first air inlet 113a and the second air inlet 133a to the rear chamber of the power distribution unit cabinet 11 and the rear chamber of the variable frequency power unit cabinet 13 at the same time. The upper chamber is connected to the rear chamber of the power distribution unit cabinet 11 through the vent 15, and then the wind entering the variable frequency power unit cabinet 13 from the second air inlet 133a flows through the rear chamber of the variable frequency power unit cabinet 13. It flows into the rear chamber of the power distribution unit cabinet 11 through the vent 15, mixes with the wind in the rear chamber of the power distribution unit cabinet 11, and flows out through the air outlet 113b. When the reactor 3, transformer 4 and other devices are installed in the rear chamber of the power distribution unit cabinet 11 or the rear chamber of the frequency conversion power unit cabinet 13, when the wind passes through the rear chamber, it flows and takes away the absorbed heat from the air outlet 113b. outflow, achieving the effect of dissipating heat and cooling the cabinet.

In this embodiment, the partition 30 divides the power distribution unit cabinet 11 and the frequency conversion power unit cabinet 13 into two front and rear chambers, that is, a front chamber near the front and a rear chamber near the rear. Power unit 2, such as rectifier, inverter unit, etc., can be installed in the front chamber; reactor 3, transformer 4, etc. can be installed in the rear chamber; since the noise is mainly emitted by reactor 3, reactor 3 should be installed in the In the rear chamber and the fourth chamber 133 at the rear of the cabinet 10, the partition 30 can block the noise from the reactor 3 and prevent it from being transmitted to the front of the cabinet 10, thereby reducing the noise. The role of heat insulation.

For the filter module, since the heat dissipation method in this embodiment satisfies the heat dissipation effect for the reactor 3, the reactor 3 and the capacitor can be separately arranged at different positions of the cabinet 10, and the reactor 3 is arranged in the same windshield as the transformer 4. In the rear chamber of the channel, the fan is shared with the transformer 4. After splitting, there is no need to use the cooling fan that comes with the filter module, which reduces the number of fans used, thereby reducing the width of the cabinet 10 and reducing the production cost of the cabinet 10. .

The technical solution of the present utility model divides the power distribution unit cabinet 11 and the frequency conversion power unit cabinet 13 into two front and rear chambers through the partition 30, that is, the front chamber near the front of the cabinet, and the rear chamber near the rear of the cabinet. chamber. Install power units, such as rectifiers, inverter units, etc., in the front chamber; install reactor 3, transformer 4, etc. in the rear chamber; since noise is mainly emitted by reactor 3, reactor 3 is installed in the cabinet In the rear chamber at the rear, the partition can block the noise from the reactor 3 and prevent it from being transmitted to the front of the cabinet, which has the effect of reducing noise and also plays the role of heat insulation. In conjunction with the heat dissipation ventilation channel from the bottom to the top of the cabinet, a first air inlet 113a and a second air inlet 133a are respectively provided at the bottom of the rear chambers of the power distribution unit cabinet 11 and the frequency conversion power unit cabinet 13, and an outlet is provided at the top. The cold air can enter from the bottom of the cabinet, absorb heat through the cabinet, and then be discharged from the air outlet 113b at the top. The variable frequency power unit cabinet 13 is connected to the power distribution unit cabinet 11 through the vent 15, so that the distribution unit cabinet 11 is connected to the air outlet 113b. The rear chambers of the electrical unit cabinet 11 and the variable frequency power unit cabinet 13 can share the same air outlet, and thus the same set of fans can be used, reducing the usage of fans, lowering production and use costs, and ensuring that the two cabinets installed in parallel are evenly spaced. It can achieve the effect of ventilation and cooling.

In the embodiment of the present invention, as shown in Figures 1 and 2, the partition 30 includes a first partition 31 and a second partition 33. The first partition 31 and the second partition 33 are respectively in the vertical direction. It is provided in the power distribution unit cabinet 11 and the frequency conversion power unit cabinet 13 to divide the space of the power distribution unit cabinet 11 into a first chamber 111 near the front and a second chamber 113 near the rear, and to divide the frequency conversion power The unit cabinet 13 is divided into a third chamber 131 near the front and a fourth chamber 133 near the rear. A first air inlet 113a is provided at the bottom of the second chamber, and an air outlet 113b is provided at the top of the second chamber. , a second air inlet 133a is opened at the bottom of the fourth chamber 133, the first chamber 111 and the third chamber 131 are used to install the power unit and other devices, and the second chamber and the fourth chamber 133 are used to install the reactance. 3 and/or transformer 4.

When the left and right cabinets are combined, the cabinet includes a power distribution unit cabinet 11 and a frequency conversion power unit cabinet 13 arranged side by side. When two adjacent cabinets, that is, the power distribution unit cabinet 11 and the variable frequency power unit cabinet 13 are arranged side by side, a ventilation opening 15 is provided on the connecting plate between the power distribution unit cabinet 11 and the variable frequency power unit cabinet 13, which is located in the variable frequency power unit cabinet. The third chamber 131 and the fourth chamber 133 in the power distribution unit cabinet 11 serve as bypass air ducts and share the fan 51 with the first chamber 111 and the second chamber 113 in the power distribution unit cabinet 11, thereby reducing the need for frequency conversion power unit cabinets. A cooling fan 51 is provided in the chamber 13 to further reduce the number of fans 51, and the two chambers are merged to reduce noise sources.

The second chamber 113 has a first air inlet 113a at the bottom, an air outlet 113b at the top of the second chamber 113, a second air inlet 133a at the bottom of the fourth chamber 133, and is located in the second chamber 113 A cooling fan 51 is provided on the top of the second chamber 113. When the cooling fan 51 is turned on, the air is drawn from the first air inlet 113a at the bottom of the second chamber 113 to the air outlet 113b. That is, a driving airflow is also formed from the first air inlet 113a and drawn into the cabinet. Then it flows out from the cabinet through the air outlet 113b and flows through the second chamber 113. When the cabinets are combined, it is simultaneously drawn into the cabinet from the first air inlet 113a and the second air inlet 133a and flows through the second chamber 113 and The fourth chamber 133 then flows out through the air outlet 113b. When a device is installed in the second chamber 113 or the fourth chamber 133, when the wind passes through the second chamber 113 or the fourth chamber 133, it takes away the internal heat and flows out from the air outlet 113b, thereby achieving the effect of heat dissipation and cooling.

In this embodiment, the partition 30 divides the power distribution unit cabinet 11 and the frequency conversion power unit cabinet 13 into two front and rear chambers, that is, the first chamber 111 near the front and the second chamber 113 near the rear. , as well as a third chamber 131 near the front and a fourth chamber 133 near the rear. The second chamber 113 is isolated from the first chamber 111 by the first partition 31 , and the fourth chamber 133 is separated by the second partition. The plate 33 is isolated from the third chamber 131 . Power units 2, such as rectifier and inverter units, etc. are installed in the first chamber 111 and the third chamber 131; reactors 3, transformers 4, etc. are installed in the second chamber 113 and the fourth chamber 133; since the noise is mainly caused by It is emitted by the reactor 3. The reactor 3 is arranged in the second chamber 113 and the fourth chamber 133 at the rear of the cabinet 10. The partition 30 can block the noise of the reactor 3 and prevent it from being transmitted to the cabinet 10. The front part also serves as thermal insulation.

In one embodiment of the present invention, as shown in Figures 1, 2, and 3, the frequency converter cabinet 1 also includes a cooling fan unit 50. The cooling fan unit 50 is located at the air outlet 113b to drive the airflow from the first inlet. The air outlet 113a and the second air inlet 133a pass through the rear chamber of the power distribution unit cabinet 11 and the frequency conversion power unit cabinet 13, and then blow out from the air outlet 113b.

The cabinet 10 is formed with a cooling ventilation channel from the bottom to the top. The cooling fan unit 50 is installed at the air outlet 113b on the top of the power distribution unit cabinet 11. The cooling fan unit 50 can be installed inside or outside the air outlet 113b to drive the cooling fan unit 50. The cold air is drawn into the cabinet from the air inlet at the bottom of the cabinet 10, absorbs heat through the second chamber 113 and the fourth chamber 133, and then is discharged from the air outlet 113b at the top. For the second chamber 113 and the fourth chamber 133 has the effect of ventilation, flow and heat dissipation. Moreover, instead of the design method of providing an air inlet on the front door panel, shutters are no longer installed on the front door panel, which further blocks the propagation path of noise from the cabinet body 10 to the front of the cabinet.

In one embodiment of the present invention, as shown in Figures 1, 2, and 3, the frequency converter cabinet 1 also includes a mounting plate 70. The mounting plate 70 is provided in the second chamber 113 and extends along the horizontal plane. The reactance The device 3 is installed on the mounting plate 70 , and the transformer 4 is provided in the lower space of the second chamber 113 .

The connection between the installation plate 70 and the cabinet 10 can be threaded connection, welding, etc. In this embodiment, the installation plate 70 and the cabinet 10 are fixed by bolt connection, which improves the overall stability of the installation after the installation plate 70 and the cabinet 10 are connected. The stability ensures the working strength and structural stability of the installation plate 70, and ensures the stability of the reactor 3 when installed on the installation plate 70.

Furthermore, the mounting plate 70 can be connected to the inner wall surface of the second chamber 113 in a covering manner, or can be connected to the inner wall surface of the second chamber 113 incompletely, that is, between the mounting plate 70 and the second chamber 113 . There is a gap between the inner walls of the chamber 113, which can achieve the effect of installing the reactor 3 and connecting the upper and lower spaces of the second chamber 113.

In one embodiment of the present invention, as shown in Figures 2 and 3, the mounting plate 70 is connected to the inner wall surface of the second chamber 113 at its periphery to divide the second chamber 113 into an upper chamber (not shown in the figure). (labeled) and a lower chamber (not labeled), the reactor 3 is located in the upper chamber, the transformer 4 is located in the lower chamber, and the mounting plate 70 is provided with a ventilation hole 71 connecting the upper chamber and the lower chamber.

In this embodiment, the mounting plate 70 is connected to the inner wall of the second chamber 113 in a covering manner, so as to divide the second chamber 113 into an upper chamber and a lower chamber. The reactor 3 is provided with In the upper chamber, the transformer 4 is located in the lower chamber, and the mounting plate 70 is provided with a ventilation hole 71 that connects the upper chamber and the lower chamber, so that the wind can flow from the lower chamber. It flows to the upper chamber and cooperates with the air inlet 11 and the air outlet to form a cooling air duct.

In one embodiment of the present invention, as shown in FIG. 2 , the mounting plate 70 is provided with a plurality of ventilation holes 71 , and the plurality of ventilation holes 71 are arranged at intervals on the mounting plate 70 .

The arrangement of multiple ventilation holes 71 can increase the ventilation area of the mounting plate 70, thereby increasing the gas flow volume of the upper chamber and the lower chamber, ensuring the air flow and cooling capacity while the mounting plate 70 is provided, and ensuring the cooling capacity of the second chamber. The cavity 113 has the effect of ventilation, flow and heat dissipation.

In one embodiment of the present invention, as shown in Figure 2, the frequency converter cabinet 1 also includes an air hood 80. The air hood 80 is provided on the mounting plate 70. The air hood 80 is formed with an air dispersion channel 81. The air dispersion channel 81 is One end of the opening is connected to the ventilation hole 71, the other end is connected to the air outlet 113b, and the reactor 3 is located in the air dispersion duct 81.

The wind hood 80 is provided with an air dispersion duct 81 formed in the wind hood 80 , and the reactor 3 is arranged in the air dispersion duct 81 . One end opening of the air dispersion duct 81 can cover a plurality of ventilation holes 71 , and the plurality of ventilation holes 71 are concentrated. The air volume flows in the air dispersion duct 81 , thereby increasing the air flow volume to the reactor 3 and improving the ventilation and heat dissipation effect of the reactor 3 .

In one embodiment of the present invention, as shown in Figures 1 and 4, the frequency converter cabinet 1 also includes an air inlet grille 90, which covers the first air inlet 113a and the second air inlet 133a.

The arrangement of the air inlet grille 90 can, on the one hand, guide the air flow from the first air inlet 113a and the second air inlet 133a, and on the other hand, play a protective role in the cabinet 10 to prevent airflow in the external environment. Dust, garbage or sewage enters the inside of the cabinet 10 through the air inlet 11, which blocks the direction in which the outside enters the first air inlet 113a and the second air inlet 133a, thereby protecting the cabinet 10.

In one embodiment of the present invention, as shown in FIG. 2 , the cooling fan unit 50 includes a plurality of fans 51 , one or more air outlets 113 b are provided on the top, and the plurality of air outlets 113 b are provided at intervals on the top.

The arrangement of multiple fans 51, which are respectively installed at multiple air outlets, can increase the air flow speed and flow volume of the air outlets, thereby increasing the air flow volume in the first chamber 13 and the second chamber 113. , improving the ventilation and heat dissipation effect of the first chamber 13 and the second chamber 113.

In one embodiment of the present invention, as shown in FIG. 2 , the cooling fan unit further includes a fan cover 60 . The fan cover 60 has heat dissipation holes 61 . The fan cover 60 covers the outside of the fan.

Further, the cooling fan unit 50 also includes a fan cover 60. The fan cover 60 is disposed above the plurality of fans 51. The top surface of the fan cover 60 is a closed surface, and a plurality of heat dissipation holes 61 are provided on the side of the fan cover 60. , used for the fan 51 to absorb the wind in the cabinet 10 and discharge it from the side of the fan cover 60 . The setting of the fan cover 60 protects the appearance and structure of the fan 51, prevents dust and foreign objects falling from above from entering the inside of the fan 51 or the air outlet, affecting the operation of the fan 51, and improves the service life of the fan 51 and the cabinet, maintaining Improve the cleanliness of the cooling air duct.

In one embodiment, the number of fans 51 is multiple, and one fan 51 is correspondingly located outside an air outlet 113b, ensuring that the cooling air ducts inside the cabinet 10 are all connected to the fans 51, ensuring the heat dissipation of each air outlet 113b. Effect. When the fan cover 60 is a plurality of discrete small wind covers, one small wind cover is located outside a fan 51, and the plurality of small wind covers are arranged side by side through welding, bonding, etc., or the fan cover 60 is a large wind cover. A plurality of heat dissipation holes 61 are provided on the large wind hood, and one wind hood covers multiple fans 51 at the same time. The setting of the fan cover 60 protects the appearance and structure of the fan 51, prevents external dust and foreign matter from entering the inside of the fan 51 or the air outlet 113b and affecting the operation of the fan 51, improves the service life of the fan 51 and the cabinet 2, and maintains The cleanliness of the cooling air duct 16 is improved.

In one embodiment, the partition 30 is made of sheet metal. The partition 30 is made of sheet metal. In this embodiment, the partition 30 made of sheet metal has better sound insulation effect and better structural strength, which improves the blocking ability of the noise in the second chamber 113. As well as supporting the overall cabinet 10, the overall stability of the cabinet 10 is improved and the service life of the cabinet 10 is extended.

The above are only preferred embodiments of the present utility model, and are not intended to limit the patent scope of the present utility model. Under the inventive concept of the present utility model, equivalent structural transformations can be made using the contents of the description and drawings of the present utility model, or directly/ Indirect applications in other related technical fields are included in the patent protection scope of this utility model.

Claims (10)

1. A frequency converter cabinet, characterized by including: Cabinet (10), which includes a power distribution unit cabinet (11) and a variable frequency power unit cabinet (13) arranged side by side. The power distribution unit cabinet (11) and the variable frequency power unit cabinet (13) are in phase with each other. A ventilation opening (15) is provided on the side of the connection, and the power distribution unit cabinet (11) and the frequency conversion power unit cabinet (13) both have a bottom and a top arranged oppositely, as well as a front and rear arranged oppositely, The power distribution unit cabinet (11) is provided with a first air inlet (113a) at the bottom, and the top is provided with an air outlet (113b). The frequency conversion power unit cabinet (13) is provided with a second air inlet (133a) at the bottom. ;and A partition (30) is provided in the power distribution unit cabinet (11) and the frequency conversion power unit cabinet (13) in the vertical direction to separate the power distribution unit cabinet (11). 11) The space of the frequency conversion power unit cabinet (13) is divided into a front chamber near the front and a rear chamber near the rear. The space of the power distribution unit cabinet (11) The rear chamber and the rear chamber of the frequency conversion power unit cabinet (13) are connected through the vent (15), and the rear chamber of the power distribution unit cabinet (11) is used for installation Reactor (3) and/or transformer (4), the rear cavity of the variable frequency power unit cabinet (13) is used to install the reactor (3) and/or transformer (4). 2. The frequency converter cabinet according to claim 1, characterized in that the partition (30) includes a first partition (31) and a second partition (33), and the first partition (31) ) and the second partition (33) are respectively provided in the power distribution unit cabinet (11) and the frequency conversion power unit cabinet (13) to separate the space of the power distribution unit cabinet (11) into a first chamber (111) near the front and a second chamber (113) near the rear, and dividing the frequency conversion power unit cabinet (13) into a third chamber near the front chamber (131) and a fourth chamber (133) near the rear. The first air inlet (113a) is provided at the bottom of the second chamber (113), and the first air inlet (113a) is provided at the top of the second chamber. The air outlet (113b), the second air inlet (133a) is provided at the bottom of the fourth chamber (133), the first chamber (111) and the third chamber (131) The second chamber (113) and the fourth chamber (133) are used to install a power unit, and the second chamber (113) and the fourth chamber (133) are used to install a reactor (3) and/or a transformer (4). 3. The frequency converter cabinet according to claim 1, characterized in that the frequency converter cabinet further includes a cooling fan unit (50), and the cooling fan unit (50) is located at the air outlet (113b) , to drive the air flow from the first air inlet (113a) and the second air inlet (133a) through the rear part of the power distribution unit cabinet (11) and the frequency conversion power unit cabinet (13) The chamber is blown out from the air outlet (113b). 4. The frequency converter cabinet according to claim 2, characterized in that the frequency converter cabinet further includes a mounting plate (70), and the mounting plate (70) is provided in the second chamber (113) , and extends along the horizontal plane, the reactor (3) is installed on the surface of the mounting plate (70) facing the top, and the transformer (4) is located at the bottom forming the second chamber (113) Location. 5. The frequency converter cabinet according to claim 4, characterized in that the mounting plate is connected to the inner wall surface of the second chamber (113) at its periphery to connect the second chamber (113). ) is divided into an upper chamber (151) and a lower chamber (153), the reactor is located in the upper chamber (151), the transformer is located in the lower chamber (153), the The mounting plate (70) is provided with a ventilation hole (71) connecting the upper chamber (151) and the lower chamber (153). 6. The frequency converter cabinet according to claim 5, characterized in that the mounting plate (70) has a plurality of ventilation holes (71), and the plurality of ventilation holes (71) are arranged at intervals. Distributed on the mounting plate (70). 7. The frequency converter cabinet according to claim 5 or 6, characterized in that the frequency converter cabinet further includes a wind cover (80), and the wind cover (80) is provided on the mounting plate (70) , the wind cover (80) is formed with an air dispersion channel (81), one end of the air dispersion channel (81) is connected to the ventilation hole (71), and the other end is connected to the air outlet (113b), so The reactor (3) is installed in the air dispersion duct (81). 8. The frequency converter cabinet according to any one of claims 2 to 6, characterized in that the frequency converter cabinet further includes an air inlet grille (90), and the air inlet grille (90) covers at the first air inlet (113a) and the second air inlet (133a). 9. The frequency converter cabinet according to claim 3, characterized in that the cooling fan unit (50) includes a plurality of fans (51), and the number of the air outlets (113b) provided on the top is one or A plurality of air outlets (113b) are provided at intervals on the top. 10. The frequency converter cabinet according to claim 9, characterized in that the cooling fan unit further includes a fan cover (60), the fan cover (60) has heat dissipation holes (61), and the fan cover (60) 60) A cover is installed outside the fan.