KR101622773B1

KR101622773B1 - A filtering apparatus for preventing foreign material from inflow in inlet of fan

Info

Publication number: KR101622773B1
Application number: KR1020140164525A
Authority: KR
Inventors: 김용남
Original assignee: (주)한국송풍기엔지니어링; 김용남
Priority date: 2014-11-24
Filing date: 2014-11-24
Publication date: 2016-05-19

Abstract

A foreign substances introduction preventing filter device for an inlet of a blower is disclosed. The foreign substances introduction preventing filter device for an inlet of a blower comprises: a filter assembly installed in an air inlet of a blower to filter foreign substances contained in the introduced air; a cover housing installed to cover and surround an upper portion and a side surface of the filter assembly and allowing external air to be introduced through a lower portion; and a blocking member reducing an upward flow of the air to the filter assembly through the lower portion of the cover housing to enable the foreign substances to freely fall by gravity to be removed. The purpose of the present invention secures operational stability and increases durability.

Description

FIELD OF THE INVENTION [0001] The present invention relates to a filter device for preventing foreign matter from entering the inlet of a blower,

The present invention relates to a filter device for preventing foreign matter such as sand contained in air sucked by a blower from being introduced into a blower inlet.

Generally, when there is a concern that foreign matter may be sucked into the blower by suction of air around the blower installed therein, a filter is installed for the purpose of preventing foreign matter from flowing into the suction port of the blower.

The main filter used is fiber or metal filter depending on the type of foreign matter introduced. Especially in the Middle East, there is a risk of sand inflow due to sand wind generated in the surrounding desert. The so-called metal filter is used mainly because it is tightly woven and passes only air and sand.

For example, as shown in FIG. 1A, a filter is used in which multiple layers of metal mesh are laid over and air is passed through and sand is filtered. First, the filter unit 1 as shown in FIG. 1A is manufactured and the filter size is designed in consideration of the air volume of the blower 2, as shown in FIG. 1B, Is arranged so that the air sucked into the blower 2 passes through the filter.

However, although the sand is filtered by the filter described above, when the amount of sand is increased, a so-called clogging phenomenon occurs and the pressure loss is increased, so that the performance of the blower is lowered and the efficiency is lowered.

In order to solve such problems, the filter should be periodically cleaned. However, if the sand is embedded deeply, it is difficult to clean cleanly and the operation of the equipment (plant, etc.) installed in the blower must be stopped due to frequent machine stoppage. There is a problem that the loss increases.

In addition, since the filter is installed at a high position, there is a risk of maintenance when the machine is cleaned during operation.

Korean Patent Publication No. 10-2012-0114109 Korean Patent Publication No. 10-2002-0033354

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and it is an object of the present invention to provide a filter device for preventing foreign matter from entering the blower inlet, which is capable of suppressing damage and clogging of the filter by blocking sand introduced into the filter.

To achieve the above object, there is provided a filter device for preventing foreign matter from entering the blower inlet, comprising: a filter assembly installed at an air inlet of a blower to filter foreign substances contained in the introduced air; A cover housing which is installed to cover and cover the upper and side surfaces of the filter assembly and through which a foreign air flows; And a blocking member for reducing the flow of the flowing air upward to the filter assembly through the lower portion of the cover housing so that the foreign substances are freely dropped by gravity and removed.

The apparatus may further include an automatic cleaning unit for spraying compressed air from the inside of the filter assembly to the outside to automatically clean the filter assembly.

Further, the cover housing may include a lid part coupled to and supported on the upper part of the filter assembly; And a side wall installed to extend downward from a side surface of the cover to surround a side surface of the filter assembly, wherein external air is introduced to the filter assembly side through a lower portion between the side wall and the filter assembly .

Further, the blocking member may be provided on the inner side of the side wall, and may have a plurality of holes.

The filter assembly may further include: a top plate having a clogged structure; And a plurality of unit filter units installed to extend downward from the rim of the upper plate. The upper unit and the unit filter unit are formed to have a frame structure and cover the upper portion of the air inlet.

The control unit may further include a pressure gauge for measuring a differential pressure of the air intake port and a control unit for controlling the automatic cleaning unit to automatically clean the filter unit when the differential pressure measured by the pressure gauge is equal to or greater than a preset reference value It is good to do.

According to the filter device for preventing foreign matter from entering the blower inlet, the flow of air ascending to the filter assembly is slowed down and collided, so that foreign substances with large air content can be freely dropped by self weight and automatically removed .

Accordingly, it is possible to prevent the filter assembly from being clogged by particles such as large sand or the like, thereby prolonging the filter life, and minimizing the suction pressure loss, thereby preventing the filtering efficiency from being lowered.

In addition, since the filter assembly can be automatically cleaned by spraying with the pressurized air, it is unnecessary for the operator to manually clean the filter, so that the cleaning time can be shortened, no separate cleaning force is required, The cost can be reduced, and the filter assembly can be used semi-permanently.

1A is a view for explaining a conventional filter.
1B is a view for explaining a filter installed in a conventional blower inlet.
2 is a perspective view showing a filter device for preventing foreign matter from entering the blower inlet according to the embodiment of the present invention.
3 is a front view of the filter device shown in Fig.
4 is a perspective view of the filter device shown in Fig.
Fig. 5 is a perspective view showing the blocking member shown in Fig. 3; Fig.
FIG. 6A is a cross-sectional view showing the unit filter unit shown in FIG. 2. FIG.
Fig. 6B is a plan view showing the essential part of the unit filter unit shown in Fig. 6A.
Figure 7 is a schematic plan view illustrating the prior art of the filter assembly.
9 is a schematic plan view of a filter assembly according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a filter device for preventing foreign matter from entering a blower inlet according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

2 to 6, the filter device 100 for preventing foreign matter from entering the blower inlet according to the embodiment of the present invention includes a filter assembly 110 installed at the air inlet 11 of the blower 10, A cover housing 120 which is installed to cover the upper and side surfaces of the assembly 110 and a cover 130 which covers the upper and the lower sides of the assembly 110 and which blocks the movement of the foreign substances contained in the flowing air flowing through the lower portion of the cover housing 120 toward the filter assembly 110 And an automatic cleaning unit 140 for automatically cleaning the filter assembly 110 and the blocking member 130.

The blower 10 is installed outside the building to filter the outside air to supply clean air filtered into the inside of the building or the boiler. The air inlet 11 may be installed in the form of a duct on the upper side of the blower 10.

The filter assembly 110 is installed in the air inlet 11 to filter foreign matter contained in the air, particularly, sand in the case of the Middle East. The filter assembly 110 is installed to cover the air inlet 11 by connecting a plurality of unit filter units 111 as shown in FIG. 6A. The unit filter unit 111 may have a mesh portion 111a and a perforated plate 111b covering the mesh portion 111a and having a plurality of pores h.

The perforated plate 111b is provided so as to cover at least one surface of the mesh portion 111a so that the mesh portion 111a maintains a compact state and maintains the shape of the filter unit 111. [ The filter assembly 110 may be formed in the shape of a rectangular frame by connecting the unit filters 111 having such a configuration to each other. The upper plate 112 of the filter assembly 110 may have a closed plate structure. That is, the filter unit 111 is installed only on the side of the filter assembly 110, and the top plate 112 is a closed structure, and the cover housing 120 is coupled and supported. And the lower portion of the filter assembly 110 is opened to communicate with the air inlet 11.

The cover housing 120 is installed to cover the top and side surfaces of the filter assembly 110. The cover housing 120 includes a lid 121 coupled to and supported by the upper portion of the filter assembly 110 and a lower portion extending downward from the side of the lid 121 and having a side surface of the filter assembly 110 And has a side wall 123 to be installed.

The lid part 121 is formed in a roof shape, for example, to have an upper surface formed to be inclined downward from the center of the upper part to the rim so as to protect the filter assembly 110 from rainwater or the like.

The side wall 123 is installed to cover the side of the filter assembly 110 so as to face the filter assembly 110 at a distance from the filter assembly 110 and an air inlet 123a may be formed at the lower side. Of course, the lower portion of the cover housing 120 may be open so that external air can be moved upwardly through the space 125 between the side wall 123 and the filter assembly 110 toward the filter assembly 111 side. To this end, the side wall 123 is installed to extend to a lower position than the filter assembly 110 such that the flow of external air entering the filter assembly 110 is directed upward at a lower position than the filter assembly 110 .

A blocking member 130 is installed on the inner wall of the cover housing 120 so that foreign substances such as large particles of sand or the like are contained in the air flowing toward the filter assembly 110 from the bottom to the top, And may be lowered by a load (gravity) after colliding with the blocking member 130.

This blocking member 130 is provided on the inner wall of the side wall 123 and has a perforated plate structure having a plurality of holes 130a as shown in Fig. The blocking member 130 preferably has a horizontal portion 131 connected to the side wall 123 and an inclined portion 132 extending downwardly inclined from the horizontal portion 131. [ Accordingly, when the external air rising from the lower portion of the cover housing 120 collides against the blocking member 130, foreign matter (sand or the like) having a relatively large particle falls down due to gravity and separates only small particles of foreign matter and air Passes through the blocking member 130 and enters the filter assembly 110. That is, it is possible to minimize the suction pressure loss in the blower 10 by suppressing the sand to be nipped in the filter assembly 110 by allowing the sand or the like to drop naturally by its own weight.

Further, an automatic cleaning unit 140 for automatically cleaning the filter assembly 110 is further provided. The automatic cleaning unit 140 includes an injection nozzle 141 installed inside the filter assembly 110, a compressed air generating unit 143 for generating compressed air to be supplied to the injection nozzle 141, And a compressed air supply pipe 145 for connecting the spray nozzles 141 and 143 with each other. The injection nozzle 141 is provided so as to face the filter unit 111 and blows compressed air to the filter unit 111 side so that the filter unit 111 shakes off the foreign substances clogged in the filter unit 111 to the outside. For this purpose, a plurality of injection nozzles 141 are provided inside the filter assembly 110, and the filter unit 111 is installed close to the filter assembly 111.

The compressed air generating unit 143 may be installed outside the filter assembly 110 or may be installed inside the building and generate compressed air to supply the compressed air to the injection nozzle 141 through the compressed air supply pipe 145 . The compressed air generating unit 143 may include a compressor. As described above, since the filter assembly 110 is automatically cleaned by using the automatic cleaning unit 140, it is not necessary for the operator to perform the cleaning work as in the conventional art, The cleaning time can be shortened, and the maintenance cost can be reduced.

More preferably, the pressure gauge 150 senses the pressure acting on the air inlet 11 and the pressure gauge 150 controls the operation of the compressed air generator 143 according to the pressure value sensed by the pressure gauge 150 And a control unit (160). That is, when a large amount of the filter unit 111 is clogged by foreign matter, a large differential pressure generated by the blower is applied to the air inlet 11. The control unit 160 drives and controls the compressed air generating unit 143 to inject compressed air when the differential pressure measured by the pressure gauge 150 is equal to or greater than a preset reference value. In this case, the foreign matter trapped in the filter unit 111 is discharged to the outside by the compressed air injected from the injection nozzle 141, and the filter performance can be improved. When the cleaning operation of the filter unit 111 is completed, the pressure measured by the pressure gauge 150 falls below the reference value. In this case, the control unit 160 stops driving the compressed air generating unit 143 . As described above, since the cleaning operation of the filter unit 110 is automatically performed by the control unit 160, the maintenance of the filter unit 110 is easily performed, and the filter performance of the filter unit 110 can be prevented from deteriorating.

As described above, according to the filter device 100 for preventing foreign matter from entering the blower inlet, the sand or foreign matter to be introduced into the air inlet 11 of the blower 10 can be supplied to the blocking member 130 By slowing the airflow rate by using the filter assembly 110, it can be filtered so that it falls freely by gravity (gravity) and can not be introduced into the filter assembly 110. Accordingly, it is possible to prevent the filter assembly 110 from being damaged by foreign substances such as sand, and to reduce the damage or damage of the filter, thereby minimizing the pressure loss of the blower 10.

And the automatic cleaning unit 140 can be used to automatically clean the filter assembly 110 so that it can be used semi-permanently without replacing the filter assembly 110, saving maintenance costs .

As shown in FIG. 7, in order to enlarge the area of the filter 1 in consideration of the fact that the performance of the filter 1 is clogged with foreign substances such as sand, a large number of filters 1 are arranged in a zigzag manner and connected In this case, there are problems in that the cost is increased to use a large number of filters, the installation work is complicated and takes up a lot of space. However, as shown in FIG. 8, the filter assembly 110 'according to another embodiment of the present invention connects the plurality of unit filter units 111 linearly or vertically, It is possible to use a small number of filter units 111 and thus to reduce the cost. In addition, since the filter unit 111 can be connected to the connecting member 115 without being connected by welding, the filter unit 111 can be easily installed.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. Those skilled in the art will readily appreciate that many modifications and variations of the present invention are possible without departing from the spirit and scope of the appended claims.

10 .. Blower 11 .. Air Inlet
100 .. Filter device to prevent foreign matter from entering the blower inlet
110, 110 '.. Filter assembly 120 .. Cover housing
130 .. blocking member 140 .. automatic cleaning unit
150 .. Pressure gauge 160 .. Control unit

Claims

A filter assembly installed at an air inlet of the blower to filter out foreign substances contained in the introduced air;
A cover housing which is installed to cover and cover the upper and side surfaces of the filter assembly and through which a foreign air flows;
And a blocking member that reduces the flow of the flowing air that rises to the filter assembly through a lower portion of the cover housing so that foreign matter falls freely by gravity to be removed.

The method according to claim 1,
Further comprising an automatic cleaning unit for automatically cleaning the filter assembly by injecting compressed air outwardly from the inside of the filter assembly.

The cover according to claim 1 or 2,
A lid portion coupled to and supported on the upper portion of the filter assembly; And
And a side wall extending downward from a side surface of the lid portion and installed to surround a side surface of the filter assembly,
Wherein external air is moved up to the filter assembly side through a lower portion between the side wall and the filter assembly to move the foreign matter into the filter assembly.

The method of claim 3,
Wherein the blocking member is provided on the inner side of the side wall and has a plurality of holes formed therein.

3. The filter assembly of claim 1 or 2,
An upper plate having a clogged structure;
And a plurality of unit filter units installed to extend downward from the rim of the upper plate,
Wherein the filter unit is formed to have a frame structure by the upper plate and the unit filter unit so as to cover the upper portion of the air intake port.

6. The method of claim 5,
A pressure gauge for measuring a differential pressure of the air intake port,
Further comprising a control unit for controlling the automatic cleaning unit to automatically clean the unit filter unit by driving the automatic cleaning unit when the differential pressure measured by the pressure gauge is equal to or greater than a preset reference value.