CN213101246U - Filter device for frequency converter and frequency converter assembly - Google Patents

Abstract

Disclosed are a filtering apparatus for a frequency converter and a frequency converter assembly, the filtering apparatus of the frequency converter assembly including: the air inlet channel is provided with a length, the length extends along the airflow direction, and an air outlet of the air inlet channel is connected with an air inlet of a fan of the frequency converter; and the filter screen is arranged at the air inlet of the air inlet channel. Through setting filter equipment to extend along the air current direction, can make filter equipment's air intake keep away from the air intake of the fan of converter like this, consequently can avoid filter equipment to the influence of the volume of the air of the fan that gets into the converter to the size of setting up the filter screen at filter equipment's air intake does not receive the influence of the size of the air intake of fan, therefore can not influence the heat dispersion of converter.

Description

Filter device for frequency converter and frequency converter assembly

Technical Field

The embodiment of the utility model provides a relate to the converter field, especially relate to a filter equipment for converter to and including this filter equipment's converter subassembly.

Background

The frequency converter is an electric control device which applies a frequency conversion technology and a microelectronic technology and controls an alternating current motor by changing the frequency mode of a working power supply of the motor. The frequency converter mainly comprises a rectifying unit, a direct current unit and an inversion unit. With the continuous improvement of the industrial automation degree, the special requirements of various production equipment on power supply are also continuously increased, and the frequency converter can adjust the voltage and the frequency of an output power supply and provide the required power supply voltage according to the actual requirements of the motor so as to save energy and regulate speed, so that the frequency converter is more and more emphasized in the production field.

In order to improve the reliability of the frequency converter, a filtering device is generally used to filter impurities such as fibers, dust and the like in the air so as to prevent the impurities from blocking an air inlet and an air inlet channel of a fan in the frequency converter; however, in the prior art, these filter devices are mostly disposed at the air inlet of the fan of the inverter, which limits the size of the filter device (i.e., the size of the filter device is almost the same as the size of the air inlet of the fan) and prevents air from entering the air inlet of the fan. Further, since the size of the filter device is almost the same as the size of the air intake of the fan, it may result in that the air entering through the filter device is insufficient to maintain the performance of the fan, and thus the heat dissipation performance of the inverter may be affected. In addition, because the air intake of fan usually is in cable entry below, consequently, inconvenient filter screen to filter equipment carries out the dismouting under the circular telegram of converter circumstances, otherwise the safety problem appears easily.

SUMMERY OF THE UTILITY MODEL

An object of the present invention is to solve at least one of the above problems and disadvantages in the prior art.

According to the utility model discloses an embodiment provides a filter equipment for converter, include: the air inlet channel is provided with a length, the length extends along the airflow direction, and an air outlet of the air inlet channel is connected with an air inlet of a fan of the frequency converter; and the filter screen is arranged at the air inlet of the air inlet channel.

According to the utility model discloses a filter equipment of exemplary embodiment, inlet air channel include first inlet air channel and with the second inlet air channel of first inlet air channel bottom fluid intercommunication, second inlet air channel's air outlet with the air intake connection of fan, first inlet air channel with the detachable connection of second inlet air channel.

According to the utility model discloses a filter equipment of exemplary embodiment still is including setting up the air outlet of second inlet air channel with sealing member between the air intake of fan.

According to the utility model discloses a filter equipment of an exemplary embodiment, second inlet air channel is enclosed to close by first portion and second portion and forms, the second portion with the first portion is detachable to be connected, the air outlet forms on the second portion, the periphery of air outlet is provided with the sealing member supporting part, the sealing member is installed on the sealing member supporting part.

According to an exemplary embodiment of the present invention, the first air inlet channel is enclosed by a wall and formed with an aperture in fluid communication with the second air inlet channel.

According to an exemplary embodiment of the present invention, the first portion of the second air inlet channel is connected to the first air inlet channel and comprises a front side wall and a second bottom wall, and a second right side wall connected to the front side wall and the second bottom wall, respectively; the second part of second inlet air duct includes second rear side wall and with the second roof that second rear side wall is connected, the air outlet forms on the second roof, the second roof respectively with the second right side wall with first inlet air duct's wall sliding connection, the second rear side wall with the detachable connection of first part, the lateral wall orientation behind the second first inlet air duct transversely extends to with the detachable connection of first inlet air duct.

According to an exemplary embodiment of the present invention, a side of the second top wall adjacent to the second right side wall is provided with a first protrusion, the second right side wall is provided with a first combining groove, and the first protrusion is at least partially inserted into the first combining groove; the second roof is close to one side of first inlet air channel's wall is provided with the second bulge of upwards extending, the correspondence of first inlet air channel's wall the part of second inlet air channel is provided with second and combines the groove, the second bulge inserts at least partially in the second combines the groove.

According to the utility model discloses a filter equipment of exemplary embodiment, the cross-sectional area of inlet air channel's air intake is greater than the cross-sectional area of the air intake of fan.

According to the utility model discloses a filter equipment of exemplary embodiment, the filter screen with air intake detachable type connection of inlet air channel.

The air inlet channel comprises a first air inlet channel and a second air inlet channel which is communicated with the bottom of the first air inlet channel in a fluid mode, the air flow direction in the second air inlet channel is perpendicular to the air flow direction in the first air inlet channel, and the air outlet of the second air inlet channel is connected with the air inlet of the fan.

According to another embodiment of the present invention, there is also provided a frequency converter assembly, which includes a frequency converter and the filtering device as described above.

According to the utility model discloses a converter subassembly of an exemplary embodiment, filter equipment's first inlet air channel is located one side of converter, filter equipment's second inlet air channel is located the below of converter, second inlet air channel's air outlet with the air intake connection of the fan of converter, filter equipment's top with the top of converter flushes.

According to the utility model discloses a converter subassembly of an exemplary embodiment, air intake channel's air intake is followed the front end protrusion of converter.

According to the utility model discloses above-mentioned various embodiments converter subassembly and filter equipment thereof, through setting filter equipment to have a length that extends along the air current direction, can make filter equipment's air intake keep away from the air intake of the fan of converter like this, consequently can avoid the influence of filter equipment to the volume of the air of the fan that gets into the converter to the size of the filter screen of setting at filter equipment's air intake does not receive the influence of the size of the air intake of fan, therefore can not influence the heat dispersion of converter. In addition, the filter device is safe, convenient and convenient to disassemble and assemble and clean.

Drawings

These and/or other aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the preferred embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a perspective view illustrating a filtering apparatus for a frequency converter according to an exemplary embodiment of the present invention;

FIG. 2 is an exploded view of the filter assembly shown in FIG. 1;

FIG. 3 is a perspective view of a first portion of the first and second inlet air channels of the filter assembly shown in FIG. 1;

FIG. 4 is a perspective view of a second portion of a second inlet air channel of the filter assembly shown in FIG. 1;

FIG. 5 is a perspective view of the first and second inlet air channels of the filter assembly of FIG. 1;

FIG. 6 is a cross-sectional view of the filter assembly shown in FIG. 1;

FIG. 7 is an enlarged view of portion A of FIG. 6;

FIG. 8 is a schematic view of the filter screen and the air intake channel of the filter apparatus shown in FIG. 1 being snap-fit together;

fig. 9 is a schematic view of a filter screen and an air intake passage of a filter device for a frequency converter according to another exemplary embodiment of the present invention, which are connected by bolts;

fig. 10 is a plan view of a frequency converter assembly according to an exemplary embodiment of the present invention;

FIG. 11 is a perspective view of the frequency converter assembly shown in FIG. 10;

FIG. 12 is an exploded view of the frequency converter assembly shown in FIG. 10; and

fig. 13 is another perspective view of the frequency converter shown in fig. 10.

Detailed Description

While the present invention will be fully described with reference to the accompanying drawings, which contain preferred embodiments of the invention, it is to be understood that those skilled in the art can, prior to this description, modify the embodiments described herein while obtaining the technical effects of the invention. Therefore, it should be understood that the foregoing description is a broad disclosure directed to persons of ordinary skill in the art, and is not intended to limit the exemplary embodiments of the invention described herein.

Furthermore, in the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the disclosure. It may be evident, however, that one or more embodiments may be practiced without these specific details. In other instances, well-known structures and devices are shown in schematic form in order to simplify the drawing.

According to the present general inventive concept, there is provided a filter device for a frequency converter, comprising an air inlet channel having a length extending in an air flow direction, an air outlet of the air inlet channel being connected to an air inlet of a fan of the frequency converter; and the filter screen is arranged at the air inlet of the air inlet channel.

According to another general inventive concept of the present invention, there is provided a frequency converter assembly comprising a frequency converter and a filter device as described above.

Fig. 1 is a perspective view illustrating a filtering apparatus for a frequency converter according to an exemplary embodiment of the present invention; FIG. 2 is an exploded view of the filter assembly shown in FIG. 1; FIG. 3 is a perspective view of a first portion of the first and second inlet air channels of the filter assembly shown in FIG. 1; FIG. 4 is a perspective view of a second portion of a second inlet air channel of the filter assembly shown in FIG. 1; FIG. 5 is a perspective view of the first and second inlet air channels of the filter assembly of FIG. 1; FIG. 6 is a cross-sectional view of the filter assembly shown in FIG. 1; FIG. 7 is an enlarged view of portion A of FIG. 6; FIG. 8 is a schematic view of the filter screen and the air intake channel of the filter apparatus shown in FIG. 1 being snap-fit together; fig. 9 is a schematic view of a filter screen and an air intake passage of a filter device for a frequency converter according to another exemplary embodiment of the present invention, which are connected by bolts; fig. 10 is a plan view of a frequency converter assembly according to an exemplary embodiment of the present invention; FIG. 11 is a perspective view of the frequency converter assembly shown in FIG. 10; FIG. 12 is an exploded view of the frequency converter assembly shown in FIG. 10; and fig. 13 is another perspective view of the frequency converter shown in fig. 10.

In an exemplary embodiment, as shown in fig. 1 to 13, the filter device 100 for the frequency converter 200 includes an air intake passage having a length extending in an air flow direction and a filter screen 2. Specifically, the air inlet channel comprises a first air inlet channel 1 and a second air inlet channel communicated with the first air inlet channel 1, so that the air flow entering from the first air inlet channel can be guided into the second air inlet channel along the air flow direction. The first air inlet channel 1 may be located facing a control panel of the frequency converter 200, for example, and the air outlet 43 of the second air inlet channel is connected with an air inlet 201 of a fan of the frequency converter 200. The filter screen 2 is arranged at the air inlet of the first air inlet channel 1 and is used for filtering impurities such as fibers, dust and the like in the air entering the air inlet channel.

The utility model provides a filter equipment 100 is set to have a length that extends along the air current direction, can make filter equipment 100's air intake keep away from the air intake 201 of the fan of converter 200 like this, consequently can avoid filter equipment 100 to the influence of the volume of the air of the fan that gets into converter 200 to the size of the filter screen 2 of the air intake of filter equipment 100 of setting does not receive the influence of the size of the air intake 201 of fan, therefore can not influence the heat dispersion of converter 200.

Although in this embodiment the direction of the air flow in the second air inlet channel is perpendicular to the direction of the air flow in the first air inlet channel 1, it should be noted that in other embodiments of the present invention, the direction of the air flow in the second air inlet channel may not be perpendicular to the direction of the air flow in the first air inlet channel 1, for example, at an angle greater than 90 ° or less than 90 ° with respect to the first air inlet channel 1. In addition, in other embodiments, only the first air intake channel 1 may be included, and the air outlet of the first air intake channel 1 may be directly connected to the air inlet 201 of the fan of the frequency converter 200.

In an exemplary embodiment, as shown in fig. 1, the second air inlet channel is detachably connected to the first air inlet channel 1, for example, by bolting, ultrasonic welding, or heat-melting, so that the second air inlet channel with different specifications can be easily replaced to adapt to different frequency converters 200.

In an exemplary embodiment, as shown in fig. 6 and 11, the filter device 100 further includes a sealing member 5 disposed between the air outlet 43 of the second air inlet channel and the air inlet 201 of the fan, wherein the sealing member 5 is used for preventing air from escaping from the combination surface between the air outlet 43 of the second air inlet channel and the air inlet 201 of the fan, and preventing external impurities such as dust from entering into the air inlet channel and the frequency converter 200.

In an exemplary embodiment, as shown in fig. 2, 3, 4 and 5, the second air intake channel is formed by enclosing a first portion 3 and a second portion 4, the second portion 4 is detachably connected to the first portion 3, for example, by bolting, ultrasonic welding or hot melting, etc., an air outlet 43 of the second air intake channel is formed on the second portion 4, a sealing member support 44 is disposed on the periphery of the air outlet 43, and the sealing member is mounted on the sealing member support 44. The utility model provides a filter equipment 100 is through the detachable connection of second part 4 with first part 3 with second inlet air channel to the second part 4 that has different sealing member supporting part 44 is convenient for change, thereby can make this filter equipment 100 can be applicable to the air intake 201 of different specifications.

In an exemplary embodiment, as shown in fig. 1 and 3, the first air intake channel 1 is formed by enclosing a first right side wall 11, a first top wall 12, a first left side wall 13, a first bottom wall 14, and a first rear side wall 15 connected to the first right side wall 11, the first top wall 12, the first left side wall 13, and the first bottom wall 14, respectively, in sequence, and the first right side wall 11 is formed with an aperture in fluid communication with the second air intake channel. The side of the first air inlet channel 1 opposite to the first rear side wall 15 forms an air inlet of the first air inlet channel 1 (i.e. an air inlet of the air inlet channel), so that air enters through the air inlet of the first air inlet channel 1, flows to the second air inlet channel from the hole on the first right side wall 11 of the first air inlet channel 1, and then enters through the air outlet 43 of the second air inlet channel into the air inlet 201 of the fan of the frequency converter 200. It should be noted that although the first air inlet channel has a square structure in this embodiment, it should be understood by those skilled in the art that the first air inlet channel may have other shapes such as a circle in other embodiments of the present disclosure.

In an exemplary embodiment, as shown in fig. 3, the first portion 3 is detachably connected to the first air intake duct 1, for example, by bolting, ultrasonic welding, or heat-melting, and includes a front side wall 32 and an inclined second bottom wall 33, and a second right side wall 31 connected to the front side wall 32 and the second bottom wall 33, respectively; as shown in fig. 4, the second portion 4 includes a second rear sidewall 41 and a second top wall 42 connected to the second rear sidewall 41, and the air outlet 43 is formed in the second top wall 42.

In an exemplary embodiment, as shown in fig. 3 to 7, second top wall 42 is slidably connected to second right side wall 31 and first right side wall 11, respectively, and second rear side wall 41 is detachably connected to first portion 3, for example, by bolts. Specifically, a side of the second top wall 42 close to the second right side wall 31 is provided with a first protruding portion 42A protruding toward the second right side wall 31, the second right side wall 31 is provided with a first coupling groove 31A, and the first protruding portion 42A is at least partially inserted into the first coupling groove 31A; a side of the second top wall 42 close to the first right sidewall 11 is provided with a second protrusion 42B extending upward, a bottom of a portion of the first right sidewall 11 corresponding to the second air intake passage is provided with a second coupling groove 11A, and the second protrusion 42B is at least partially inserted into the second coupling groove 11A.

In an exemplary embodiment, as shown in fig. 5, the second rear sidewall 41 extends transversely toward the first left sidewall 13 and is detachably connected, such as bolted or the like, to the first left sidewall 13, the first rear sidewall 15 and the first bottom wall 14, respectively. When the second rear side wall 41 is mounted in place, the front end of the second top wall 42 (i.e., the end remote from the second rear side wall 41) abuts against the top of the second front side wall 32. In order to prevent air from escaping from the air inlet channel, the bottom surface of the second top wall 42 is provided with ribs, which is located inside the abutment of the second top wall 42 and the second front side wall 32 (i.e., on the side close to the second rear side wall 41), and similarly, the inner surface of the first left side wall 13 is also provided with a rib, which is used to prevent air from escaping from the gap between the first left side wall 13 and the second rear side wall 41, the inner surface of the first bottom wall 14 is also provided with ribs, which is intended to prevent air from escaping from the gap between the first bottom wall 14 and the second rear side wall 41, the second bottom wall 33 is also provided on its inner surface with ribs, which is for preventing air from escaping from the gap between the second bottom wall 33 and the second rear side wall 41, the second right side wall 31 is also provided on its inner surface with ribs, the rib serves to prevent air from escaping from the gap between the second right sidewall 31 and the second rear sidewall 41.

The composition and connection of the first air inlet channel and the second air inlet channel are described only by way of example with reference to the accompanying drawings, however, it is obvious to a person skilled in the art that the first air inlet channel and the second air inlet channel may have different compositions and connections, for example, the first air inlet channel may be cylindrical, and the bottom of the first air inlet channel is provided with an orifice communicated with the second air inlet channel, and the first air inlet channel may also be directly connected with the second air inlet channel, or form a certain angle, and only the air flow entering from the first air inlet channel may be smoothly guided into the second air inlet channel and then enter the air inlet of the fan. The second air intake passage is not limited to the above configuration.

In an exemplary embodiment, as shown in FIG. 12, the cross-sectional area of the inlet vent of the inlet duct is substantially larger than the cross-sectional area of the inlet vent 201 of the fan. In this way, the influence of the filter device 100 on the fan performance of the inverter 200 is greatly reduced, and thus the heat radiation performance of the inverter 200 is not affected.

In an exemplary embodiment, the filter screen 2 is detachably connected to the air inlet of the air inlet channel, for example, the filter screen 2 may be connected to the air inlet of the air inlet channel by a buckle 6 (as shown in fig. 8) or may be connected to the air inlet of the air inlet channel by a bolt 7 (as shown in fig. 9).

As shown in fig. 10 to 13, the present invention further provides a frequency converter assembly, which comprises a frequency converter 200 and the filtering device 100 as described above.

In an exemplary embodiment, as shown in fig. 11, the first air intake channel 1 of the filter device 100 is located at one side of the frequency converter 200, the second air intake channel of the filter device 100 is located below the frequency converter 200, the air outlet 43 at the top of the second air intake channel is connected with the air inlet 201 of the fan of the frequency converter 200, and the top of the filter device 100 is flush with the top of the frequency converter 200.

In an exemplary embodiment, as shown in fig. 11, an air inlet of the air inlet channel protrudes from the front end (i.e., the end provided with the cable port 202) of the frequency converter 200, so that when an operator removes the filter screen 2 for cleaning or changes the filter screen 2, the operator can easily complete the cleaning without turning off the power supply, and the safety is high due to a certain distance.

According to the utility model discloses above-mentioned various embodiments's converter subassembly and filter equipment thereof, through setting filter equipment to have a length that extends along the air current direction, can make filter equipment's air intake keep away from the air intake of the fan of converter like this, consequently can avoid the influence of filter equipment to the volume of the air of the fan that gets into the converter to the size of the filter screen of setting at filter equipment's air intake does not receive the influence of the size of the air intake of fan, therefore can not influence the heat dispersion of converter. Furthermore, the first air inlet channel and the second air inlet channel are detachably mounted, so that the air conditioner can be suitable for different frequency converters by replacing different second air inlet channels. In addition, the filter device has small influence on the performance of the fan of the frequency converter, and the filter screen is easy to clean and replace.

In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be construed as limiting the present invention.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

The exemplary and alternative embodiments of the present invention described above are merely illustrative of the aspects of the present invention and the effects thereof, and are not intended to limit the present invention, and it will be apparent to those skilled in the art that any changes and modifications to the present invention are within the scope of the present invention without departing from the spirit and scope of the present invention. The protection scope of the present invention shall be defined as follows.

Claims (12)

1. A filter arrangement for a frequency converter, comprising:

the air inlet channel is provided with a length, the length extends along the airflow direction, and an air outlet of the air inlet channel is connected with an air inlet of a fan of the frequency converter; and

the filter screen is arranged at the air inlet of the air inlet channel.

2. The filter device according to claim 1, wherein the air intake channel comprises a first air intake channel and a second air intake channel in fluid communication with the bottom of the first air intake channel, the air outlet of the second air intake channel is connected with the air inlet of the fan, and the first air intake channel is detachably connected with the second air intake channel.

3. The filter device of claim 2, further comprising a seal disposed between the outlet of the second inlet air channel and the inlet of the fan.

4. The filtering device as claimed in claim 3, wherein the second air inlet channel is formed by enclosing a first portion and a second portion, the second portion is detachably connected to the first portion, the air outlet is formed on the second portion, and a sealing member supporting portion is provided at a periphery of the air outlet, and the sealing member is mounted on the sealing member supporting portion.

5. The filter device of claim 4, wherein the first inlet air channel is enclosed by a wall, and wherein the wall has an aperture formed therein in fluid communication with the second inlet air channel.

6. The filter apparatus of claim 5, wherein the first portion of the second inlet air channel is connected to the first inlet air channel and includes a front side wall and a second bottom wall, and a second right side wall connected to the front side wall and the second bottom wall, respectively; the second part of second inlet air duct includes second rear side wall and with the second roof that second rear side wall is connected, the air outlet forms on the second roof, the second roof respectively with the second right side wall with first inlet air duct's wall sliding connection, the second rear side wall with the detachable connection of first part, the lateral wall orientation behind the second first inlet air duct transversely extends to with the detachable connection of first inlet air duct.

7. The filtering device as claimed in claim 6, wherein a side of the second top wall adjacent to the second right side wall is provided with a first protrusion, the second right side wall is provided with a first coupling groove, and the first protrusion is at least partially inserted into the first coupling groove; the second roof is close to one side of first inlet air channel's wall is provided with the second bulge of upwards extending, the correspondence of first inlet air channel's wall the part of second inlet air channel is provided with second and combines the groove, the second bulge inserts at least partially in the second combines the groove.

8. The filter device according to any one of claims 1 to 7, wherein the cross-sectional area of the intake vent of the intake duct is larger than the cross-sectional area of the intake vent of the fan.

9. The filter device according to any one of claims 1 to 7, wherein the filter screen is detachably connected to the air inlet of the air inlet channel.

10. Frequency converter assembly, characterized in that it comprises a frequency converter and a filter device according to any one of claims 1-9.

11. The frequency converter assembly of claim 10, wherein the first air inlet channel of the filter device is located at one side of the frequency converter, the second air inlet channel of the filter device is located below the frequency converter, an air outlet of the second air inlet channel is connected with an air inlet of a fan of the frequency converter, and a top of the filter device is flush with a top of the frequency converter.

12. The frequency converter assembly according to claim 10, wherein the air inlet of the air inlet channel protrudes from the front end of the frequency converter.

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