Dust collector that makes it easy to remove dust from the back filter

Abstract

The present invention relates to a dust collector that facilitates the removal of dust from a bag filter, which is used to remove dust and other foreign substances contained in the air, by injecting high-pressure air at a constant pressure into the inner part of the bag filter at a constant pressure to more efficiently remove dust accumulated on the bag filter. When dust accumulates on the bag filter, it obstructs the airflow and prevents the provision of cleaner air. To solve this, compressed air is injected into the inner part of the bag filter at a constant pressure to quickly and easily remove the dust accumulated on the bag filter, thereby allowing for more efficient air purification. Furthermore, the dust collector can be used without cleaning the bag filter after replacing or separating it, thus maximizing operational efficiency. The specific solution of the present invention is provided with an inlet (100) on one side for introducing contaminated air containing dust and fine dust, an outlet (110) on the upper surface for discharging purified air, a high-pressure air valve (400) at a predetermined position on the rear, and a front bottom A housing (10) is provided with a dust container (130) that can slide nearby and a roller (140) provided near the bottom corner, and inside the housing (10) a purification space (20) is provided with a dust container (130) at the bottom and a bag filter (200) is provided above the dust container (130) and is detachably connected to a partition (300) by a frame (210) at the top while maintaining a predetermined distance, and a blower fan (310) is provided above the partition (300) and a motor (320) is provided above the blower fan (310), and an exhaust space (30) is provided above the exhaust port (110) through which purified air is discharged, and the purification space (20) is connected to the high-pressure air valve (400) provided on the rear outer side to remove fine dust and dust attached to the bag filter (200). It includes an air injection unit (40) that removes dust and fine dust attached to the bag filter (200) by falling into the dust container (130), andThe above air injection unit (40) is coupled through from the outside to the inside of the housing (10) and includes a high-pressure air valve (400) having a handle (401) at a predetermined external position; a main pipe (410) coupled to the high-pressure air valve (400); a cross-shaped auxiliary pipe (420) in which a horizontal pipe (421) and a vertical pipe (422) intersect at the end of the main pipe (410); a horizontal branch pipe (430) integrally provided above and below the vertical pipe (422); and a plurality of injection nozzles (440) that can rotate at predetermined intervals are formed on the horizontal pipe (421) and the horizontal branch pipe (430). By providing a dust collector for easy dust removal of a bag filter according to the present invention having such a configuration, the dust accumulated on the bag filter is removed using compressed air, while the entire bag filter By injecting high pressure at a constant pressure into the part, a cleaner bag filter can be maintained, facilitating the supply of clean air and maximizing operational efficiency, as well as extending the lifespan of the dust collector. Furthermore, unlike conventional technology, this invention effectively removes foreign substances, such as dust adhering to the bag filter, using only simple components; in particular, due to the simplicity of the structure, easy replacement of the bag filter can be expected. Additionally, by applying a coating agent to the outer surface of the bag filter, dust removed from the bag filter is prevented from adhering to the bag filter again, and the scattering of already collected dust is prevented. This suppresses dust adhering to the bag filter due to scattering or dust being re-discharged through the outlet, thereby preventing a decrease in filtering efficiency.

Description

Technology Field

[0001] The present invention relates to a dust collector that facilitates the removal of dust from a bag filter, which is used to remove dust and other foreign substances contained in the air, by injecting high-pressure air into the inner part of the bag filter at a constant pressure to remove dust accumulated in the bag filter more efficiently. When dust accumulates in the bag filter, it obstructs the flow of air and prevents the provision of cleaner air. To solve this problem, compressed air is injected into the inner part of the bag filter at a constant pressure to quickly and easily remove the dust accumulated in the bag filter, thereby allowing for more efficient air purification. Furthermore, the dust collector can be used without cleaning the bag filter after replacing or separating it, thus maximizing work efficiency. Background Technology

[0002] Generally, dust collectors are used in various industrial sites, particularly in indoor workplaces, to prevent the working environment from being contaminated by welding gases or dust. They typically function by drawing in air, filtering out dust particles as the inhaled air passes through a filter, and blowing harmful gases to the outside.

[0003] It is well known that dust collectors are installed and operated as an essential measure to remove chemical odors, gases and organic solvents generated in laboratories or research institutes, and to collect and treat various gases, odors, and dust generated in electrical and electronic assembly lines, as well as to remove fumes generated during operations such as ARC welding, CO welding, NAG welding, GOUGING, and special welding, and that the installation of such dust collectors purifies the contaminated air in the workplace.

[0004] It is common for such a dust collector to be configured to purify contaminated air generated within a workbench by immediate suction, or to be installed as a fixed unit at a selected designated location in the workplace, comprehensively sucking in internal air to filter out and purify various dusts and foreign substances contained in the indoor air.

[0005] In the case of such dust collectors, indoor contaminated air is drawn in from the bottom of the main housing, purified by being filtered through a filter provided inside the main housing, and then the purified air is supplied back into the room through an outlet provided on the top of the main housing, repeating a series of processes.

[0006] However, contaminated air is drawn in from the bottom of the main body housing and is forcibly guided upward, and even if dust or foreign substances are filtered, various dust or foreign substances collected in the dust collector may scatter, and there is also a concern that the dust collection efficiency may be significantly reduced as a result.

[0007] In addition, due to the frequent scattering of dust collected inside the main housing of the dust collector, the amount of dust adhering to the outside of the filter increases, and thus there is a need to frequently perform filter cleaning work to remove the dust adhering to the outside of the filter, which may lead to an excessive need for maintenance work.

[0008] In addition, when purifying air using a conventional dust collector as described above, if the filter that adsorbs dust and foreign substances is used for a long time, dust accumulates, degrading or losing the filter's inherent function, resulting in a problem where the accumulated dust must be removed periodically.

[0009] To solve the above-mentioned problems, when dust accumulates on the filter and the filter loses its function, the filter is separated from the dust collector, the accumulated dust and foreign substances are removed, and then the filter is reattached for use.

[0010] While the filter's function can be maintained by removing the dust and reusing it as described above, it is true that there are limitations to keeping the filter in optimal condition because the process is quite cumbersome and it is difficult to accurately determine the amount of accumulated dust.

[0011] Meanwhile, in order to solve the problem of removing dust and reattaching the filter after separating it as described above, various technologies have been developed and are being used as methods to remove dust without separating the filter.

[0012] In this way, the cartridge, which is integrally combined with the filter, is connected to a control lever extending to the outside of the main body, and after a certain period of time, the control lever is operated up, down, left, and right to apply impact to the filter, thereby removing dust.

[0013] However, since the above technology structurally applies minimal impact to the filter, not only was the desired effect not achieved, but problems such as the shortened lifespan of the dust collector due to the impact on the filter also occurred.

[0014] In addition, a method of removing dust from a filter by injecting high-pressure air into the inner side of the filter, rather than the aforementioned method, has been developed and is being used.

[0015] This method is generally structured such that high pressure is instantaneously injected into the upper part of the filter and then concentrated at the lower part; however, since high pressure cannot be injected across the entire filter, there are limitations in removing dust located at the top of the filter, resulting in a shortened filter lifespan and an inability to perform efficient air purification functions.

[0016] Meanwhile, in conventional general dust collectors, when outside air enters the filter chamber, the outside air enters from all sides of the filter chamber, and as a result, vortices are generated inside the filter chamber. Consequently, the dust in the filter chamber does not fall to the bottom but is vorticed within the filter chamber along with the outside air and then adsorbed onto the filter again. In addition, problems such as dust collected in the dust bin being re-dispersed due to the vortices of the outside air occurred.

[0017] In order to solve the above-mentioned problems, if we examine the technical gist of the invention titled 'Dust collector with easy dust removal from filter' of the prior patent registration No. 1044658 of the present applicant,

[0018] Claim 1

[0019] A dust collector comprising: a main body housing having an external air inlet on one side and an external air outlet formed on the upper surface, and a partition plate having external air guide holes perforated therein arranged in multiple stages on the inside; a filter chamber configured at the lower inner side of the main body housing, partitioned by the partition plate, comprising a filter for filtering contaminated air and a dust container for collecting dust or foreign substances below the filter; a high-pressure air injection chamber for blowing high-pressure air into the filter chamber to remove dust from the filter; and a blower chamber equipped with a blower for discharging filtered external air to the outside.

[0020] A dust collector that facilitates dust removal from a filter, characterized by having an air reflector inside the filter, the air reflector comprising a guide rod, a reflector that moves up and down guided by the guide rod, and a spring connected to the bottom of the reflector, wherein when high-pressure air is sprayed onto the reflector, the reflector is moved downward by the high pressure and high-pressure air is sprayed onto the entire filter at a constant pressure to remove dust from the filter.

[0021] Claim 2

[0022] In Article 1,

[0023] A dust collector that facilitates easy dust removal by a filter, characterized in that the filter chamber is equipped with an outside air guide box with only the top surface open so that outside air introduced from the outside air inlet can be scattered only in an upward direction, and a scattering prevention net is provided on the top of the dust box to prevent dust collected in the dust box from scattering.

[0024] Claim 3

[0025] In Article 1,

[0026] The above-mentioned high-pressure air injection chamber is characterized by comprising a main box connected to an external compressor, branch connecting pipes branching from the main box, solenoid valves for controlling each of the branch connecting pipes, a high-pressure hose connected to one side of the solenoid valve for blowing high-pressure air into each filter, and a fixing plate for fixing the high-pressure hose, thereby constituting a dust collector that facilitates easy dust removal from a filter.

[0027] In other words, the aforementioned prior registered technology can be described as a technology that removes foreign substances from a filter by spraying air at a constant pressure over the entire inner surface of the filter while transporting a reflector plate located at the top of the inner surface of the filter to the bottom using high-pressure air sprayed by a high-pressure hose.

[0028] First of all, the aforementioned prior registered technology is a technology developed by the applicant, and as a result of actual experiments, it is difficult to spray high-pressure air at a constant pressure while transporting the reflector plate downwards, so it ultimately does not provide significant help in removing foreign substances from the inside of the filter, and

[0029] Next, due to the pressure loss resulting from the fact that the above-mentioned reflector must fully absorb high-pressure air and transport it downwards, there are practically more problems with dust removal in the lower part than in the upper part of the filter's interior, and

[0030] Next, the aforementioned prior registered technology has a problem in removing foreign substances and dust from the filter because high-pressure air is sprayed from a high-pressure hose, and as a result, the amount of air flowing into the filter inlet is very minimal due to the small spray angle, making it practically impossible to instantaneously transport the reflector plate to the inner bottom of the filter, and consequently, the high-pressure air does not reach the inner top or even the very bottom of the filter.

[0031] Next, the very act of fixing a separate component called the air injection chamber inside each filter is inefficient in terms of time and cost, and there are also issues such as the inconvenience of replacing filters, as well as problems such as the increased time required for product manufacturing and the inefficiency of filter replacement due to the increase in the component called the air reflection part. Prior art literature

[0033] Korean Registered Patent No. 1044658 (June 21, 2011) Korean Registered Patent No. 0955252 (April 21, 2010) Korean Registered Patent No. 0737698 (July 3, 2007) Korean Registered Patent No. 1110838 (January 20, 2012) The problem to be solved

[0034] Therefore, the present invention has been devised to solve the aforementioned problems, and its primary objective is to provide a dust collector that facilitates dust removal from a bag filter, which can provide clean air more efficiently by removing dust and foreign substances from the air while removing dust accumulated on the bag filter more quickly and cleanly, thereby maintaining the bag filter's function in an optimal state.

[0035] In addition, another objective of the present invention is to provide a dust collector that maximizes work efficiency by configuring the dust removal from a bag filter using compressed air so that the operation is completed without separating the bag filter from the dust collector, extends the lifespan of the dust collector to the maximum extent by preventing impact on the bag filter during dust removal, and facilitates dust removal from the bag filter by spraying compressed air onto the entire bag filter at a constant pressure.

[0036] In addition, another objective of the present invention is to provide a dust collector that facilitates dust removal from a bag filter, which enhances the efficiency of filtering as well as ease of manufacturing and convenience of filter replacement by allowing more than 80% of foreign substances inside the bag filter to be removed by spraying high-pressure air without the addition of separate components.

[0037] In addition, another objective of the present invention is to provide a dust collector that facilitates dust removal from a bag filter, which prevents dust removed from the bag filter from being re-adsorbed onto the bag filter and prevents the scattering of already collected dust, thereby suppressing the phenomenon of dust adhering to the bag filter due to scattering or dust being re-discharged through the outlet, and thus prevents a decrease in filtering efficiency. means of solving the problem

[0038] A specific solution for the dust collector of the present invention, which facilitates dust removal of the filter for achieving the above-mentioned purpose, is:

[0039] A housing (10) is provided with an inlet (100) on one side for introducing contaminated air containing dust and fine dust, an outlet (110) on the upper surface for discharging purified air, a high-pressure air valve (400) is provided at a predetermined position on the rear, a dust container (130) is provided so as to be sliding near the lower front, and a roller (140) is provided near the bottom corner; and inside the housing (10), a purification space (20) is provided with a dust container (130) at the bottom, and a bag filter (200) is provided above the dust container (130), with the upper end detachably coupled to a partition (300) by a frame (210) while maintaining a predetermined distance, and a blower fan (310) is provided above the partition (300), and a motor (320) is provided above the blower fan (310), and above the upper end The purification space (20) includes an exhaust space (30) through which purified air is discharged through an exhaust port (110), and an air injection unit (40) which is coupled to the high-pressure air valve (400) provided on the outer rear side of the purification space (20) to drop fine dust and dust attached to the bag filter (200) into the dust container (130) to remove the dust and fine dust attached to the bag filter (200). The air injection unit (40) includes: a high-pressure air valve (400) which is coupled through from the outside to the inside of the housing (10) and has a handle (401) provided at a predetermined external position; a main pipe (410) coupled to the high-pressure air valve (400); a cross-shaped auxiliary pipe (420) in which a horizontal pipe (421) and a vertical pipe (422) intersect at the end of the main pipe (410); and a horizontal pipe integrally provided above and below the vertical pipe (422). The above objective can be achieved by having a “dust collector that facilitates dust removal from a bag filter” as a constituent feature, comprising a branch pipe (430); and a plurality of spray nozzles (440) that can be rotated at a predetermined interval are formed in the horizontal pipe (421) and the horizontal branch pipe (430).

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[0043] delete Effects of the invention

[0044] By providing a dust collector according to the present invention that facilitates dust removal from a bag filter having the above-described configuration, dust accumulated on the bag filter is removed using compressed air, and high pressure is sprayed onto the entire part of the bag filter at a constant pressure, thereby maintaining a cleaner bag filter, making it easier to supply clean air, maximizing operational efficiency, and extending the lifespan of the dust collector.

[0045] In addition, unlike conventional technology, the present invention effectively removes foreign substances, such as dust adhering to a bag filter, using only simple components; in particular, due to the simplicity of the structure, easy replacement of the bag filter can be expected.

[0046] In addition, by applying a coating agent to the outer surface of the bag filter, dust removed from the bag filter is prevented from adsorbing back onto the bag filter, and dust that has already been collected is prevented from scattering. This suppresses the phenomenon of dust adhering to the bag filter due to scattering or dust being re-discharged through the outlet, thereby exhibiting the effect of preventing a decrease in filtering efficiency.

[0047] Although the present invention has been illustrated and described above with reference to specific preferred embodiments, the present invention is not limited to the above-mentioned embodiments, and various changes and modifications may be made by those skilled in the art within the scope of the invention without departing from the spirit of the invention. Brief explanation of the drawing

[0048] FIG. 1 is an overall perspective view of a dust collector that facilitates dust removal using a bag filter according to the present invention. FIG. 2 is a cross-sectional view of a dust collector that facilitates dust removal using a bag filter according to the present invention. FIG. 3 is an exploded perspective view illustrating the internal state of a dust collector that facilitates dust removal using a bag filter according to the present invention. FIG. 4 is a perspective view of the main parts of the bag filter and the air injection part in a separated state in a dust collector that facilitates dust removal of the bag filter according to the present invention. FIG. 5 is a cross-sectional view of the usage state illustrating the flow of air in which contaminated air containing dust and fine dust introduced through an inlet, passes through a purification space and an exhaust space, and then exits through an exhaust port to be discharged to the outside as purified air in a purified state, in a dust collector of the bag filter that facilitates dust removal according to the present invention. FIG. 6 is a cross-sectional view showing the state of removing contaminants attached to a bag filter, which is a dust collector that facilitates dust removal of the bag filter according to the present invention, and shows the state of removing contaminated foreign substances such as fine dust and dust accumulated on the bag filter using an air injection part. Specific details for implementing the invention

[0049] Hereinafter, the specific configuration and operation of the dust collector of the bag filter that facilitates dust removal according to the present invention will be described together with the drawings.

[0050] FIG. 1 is an overall perspective view of a dust collector with a bag filter that facilitates dust removal according to the present invention; FIG. 2 is a cross-sectional view of a dust collector with a bag filter that facilitates dust removal according to the present invention; FIG. 3 is an exploded perspective view illustrating the internal state of a dust collector with a bag filter that facilitates dust removal according to the present invention; FIG. 4 is a perspective view of a key part showing the separated state of the bag filter and the air injection unit in a dust collector with a bag filter that facilitates dust removal according to the present invention; FIG. 5 is a cross-sectional view of the operating state illustrating the flow of air in which contaminated air containing dust and fine dust introduced through an inlet, passes through a purification space and an exhaust space, and then exits through an exhaust port to be discharged to the outside as purified air; FIG. 6 is a state showing contaminated foreign substances, such as fine dust and dust accumulated on the bag filter, attached to the bag filter, by removing them with an air injection unit in a dust collector with a bag filter that facilitates dust removal according to the present invention. This is a cross-sectional view showing the state of removing contaminants.

[0051] Reference numeral 10 indicates a housing, and the housing (10) is structured such that, as shown in FIG. 1, an inlet (100) for introducing contaminated air containing dust and fine dust is provided on one side, an outlet (110) for discharging purified air is formed on the upper surface, a high-pressure air valve (400) is provided at a predetermined position on the rear, a dust container (130) is provided so as to be slidable near the bottom front, and a roller (140) is provided near the bottom corner, and unreferenced reference numeral C is a controller for driving or adjusting the present invention.

[0052] The indicator symbol 20 indicates a purification space, and the purification space (20) is provided inside the housing (10) as shown in FIGS. 2, 5, and 6, and has a structure in which a dust container (130) is provided at the bottom and a bag filter (200) is provided above the dust container (130), with the top end detachably connected to a partition (300) by a frame (210) while maintaining a predetermined distance.

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[0055] Indicator symbol 30 indicates an exhaust space, and as shown in FIGS. 3, 5, and 6, the exhaust space (30) is equipped with a blower fan (310) at the top of the partition (300), and a motor (320) is equipped at the top of the blower fan (310), and the structure is such that purified air is discharged through the exhaust port (110) at the top.

[0056] Indicator symbol 40 indicates an air injection unit, and as shown in FIGS. 4 and 6, the air injection unit (40) is coupled with the high-pressure air valve (400) provided on the outer rear side of the purification space (20) to drop fine dust and dust attached to the bag filter (200) into the dust container (130) to remove the dust and fine dust attached to the bag filter (200). Specifically, the air injection unit (40) is,

[0057] A high-pressure air valve (400) that is coupled through from the outside to the inside of the housing (10) and has a handle (401) provided at a predetermined position on the outside;

[0058] A main pipe (410) coupled with the above-mentioned high-pressure air valve (400);

[0059] At the end of the main pipe (410), a cross-shaped auxiliary pipe (420) is formed by the intersection of a horizontal pipe (421) and a vertical pipe (422);

[0060] A horizontal branch pipe (430) integrally provided above and below the vertical pipe (422);

[0061] The above horizontal pipe (421) and horizontal branch pipe (430) include a plurality of injection nozzles (440) formed at predetermined intervals.

[0062] Preferably, the spray nozzle (440) is formed to be rotatable so as to solve the problem of removing pollutants such as dust and fine dust only from a specific part of the bag filter (200) due to being fixed, by allowing it to rotate automatically at regular intervals so as to enable the removal of fine dust and dust evenly throughout the entire bag filter (200).

[0063] In addition, although not shown in the drawing, a dust prevention net may be provided on the top of the dust container (130) to prevent foreign substances collected in the dust container (130) from flowing back or scattering again.

[0064] The operational relationship of the present invention is explained below.

[0065] As illustrated in FIG. 5, contaminated air containing indoor dust, foreign substances, impurities, etc. is introduced through an inlet (100) formed at the lower side of the housing (10) by driving a blower fan (310) that is installed on the upper inner side of the housing (10) of the dust collector of the present invention installed in an indoor space such as a factory.

[0066] The flow of contaminated air in the present invention is induced and introduced through the inlet (100) of the housing (10) and has a flow leading to the outlet (110) at the top of the housing (10), thereby involving a fluid induction phenomenon from the lower side to the upper side.

[0067] Meanwhile, contaminated air entering through the inlet (100) is filtered by a bag filter (200) provided in the purification space (20), then passes through a guide hole (not marked) perforated in the partition (300) and enters the discharge space (30), and is then discharged to the outside through the discharge port (110).

[0068] Meanwhile, as illustrated in FIGS. 4 and 6, when a large amount of fine dust or dust accumulates or adheres to the bag filter (200), the operation of the blower fan (310) is stopped at regular intervals, and then an air hose of a portable compressor or a fixed compressor is connected to the high-pressure air valve (400) of the air injection unit (40), and then the handle (401) is rotated to supply high-pressure air, the high-pressure air passes through the main pipe (410) coupled to the high-pressure air valve (400), then passes through the cross-shaped auxiliary pipe (420) where the horizontal pipe (421) and the vertical pipe (422) intersect, and as the high-pressure air moves to the horizontal branch pipe (430) integrally provided above and below the vertical pipe (422), the high-pressure air is sprayed through the injection nozzle (440) at a predetermined interval on the horizontal pipe (421) and the horizontal branch pipe (430) The fine dust and particles adhering to the bag filter (200) are sprayed into the bag filter (200) and fall into the dust container (130). At this time, the spray nozzle (440) is rotated regularly or its position can be changed at intervals of a certain period of time, thereby enabling the dust and fine dust adhering to the bag filter (200) to be removed evenly and completely.

[0069] By providing a dust collector according to the present invention that facilitates dust removal from a bag filter having the above-described configuration, dust accumulated on the bag filter is removed using compressed air, and high pressure is sprayed onto the entire part of the bag filter at a constant pressure, thereby maintaining a cleaner bag filter, making it easier to supply clean air, maximizing operational efficiency, and extending the lifespan of the dust collector.

[0070] In addition, unlike conventional technology, the present invention effectively removes foreign substances, such as dust adhering to a bag filter, using only simple components; in particular, due to the simplicity of the structure, easy replacement of the bag filter can be expected.

[0071] In addition, by applying a coating agent to the outer surface of the bag filter, dust removed from the bag filter is prevented from adsorbing back onto the bag filter, and dust that has already been collected is prevented from scattering. This suppresses the phenomenon of dust adhering to the bag filter due to scattering or dust being re-discharged through the outlet, thereby exhibiting the effect of preventing a decrease in filtering efficiency. Explanation of the symbols

[0072] 10; Housing 20; Purification space section 30; exhaust space 40; air injection part 100; Inlet 110; Outlet 130; Dust box 140; Car car 200; Back filter 210; Frame 300; compartment 310; blower fan 320; Motor 400; High-pressure air valve 401; Handle 410; Main pipe 420; Auxiliary pipe 421; Horizontal piping 422; Vertical piping 430; Horizontal branch pipe 440; Spray nozzle C; Controller

Claims

Claim 1 A housing (10) is provided with an inlet (100) on one side for introducing contaminated air containing dust and fine dust, an outlet (110) on the top for discharging purified air, a high-pressure air valve (400) is provided at a predetermined position on the rear, a dust container (130) is provided so as to be sliding near the bottom front, and a roller (140) is provided near the bottom corner. Inside the housing (10), a purification space (20) is provided with a dust container (130) at the bottom and a bag filter (200) is provided above the dust container (130), with the top part detachably connected to a partition (300) by a frame (210) while maintaining a predetermined distance. A blower fan (310) is provided above the partition (300), and a motor (320) is provided above the blower fan (310). The purification space (20) includes an exhaust space (30) through which purified air is discharged through an exhaust port (110), and an air injection unit (40) which is coupled to the high-pressure air valve (400) provided on the outer rear side of the purification space (20) to drop fine dust and dust attached to the bag filter (200) into the dust container (130) to remove the dust and fine dust attached to the bag filter (200). The air injection unit (40) includes: a high-pressure air valve (400) which is coupled through from the outside to the inside of the housing (10) and has a handle (401) provided at a predetermined external position; a main pipe (410) coupled to the high-pressure air valve (400); a cross-shaped auxiliary pipe (420) in which a horizontal pipe (421) and a vertical pipe (422) intersect at the end of the main pipe (410); and a horizontal pipe integrally provided above and below the vertical pipe (422). A dust collector that facilitates dust removal from a bag filter, comprising: a branch pipe (430); and a plurality of spray nozzles (440) that can be rotated at predetermined intervals formed in the horizontal pipe (421) and the horizontal branch pipe (430). Claim 2 delete Claim 3 delete Claim 4 delete

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