JP6234265B2 - Filter unit and dust collector - Google Patents

Description

  The present invention relates to a filter unit and a dust collector using the same.

  A conventional dust collector includes a filter unit that is fixed so that the filter can be easily replaced, and a dust collecting fan.The dust collecting fan draws dirty air into the filter unit and filters it through the filter. The contained dust was removed.

  In the filter unit, the filter is fixed so that it can be easily replaced because the filter is clogged in a short period of time so that the filter can be easily replaced.

  However, the conventional dust collector needs to be replaced every time the filter is clogged. In addition, when the filter is cleaned and reused, the filter must be cleaned. As a result, a lot of labor and labor were required for maintenance. In addition, cleaning was accompanied by deterioration of the filter, and there was a concern that the filtration performance would be drastically lowered.

  Therefore, an object of the present invention is to provide a filter unit that can save labor for maintenance such as replacement of a filter and that does not change the filtration performance of the filter, and a dust collector using the filter unit.

Order to achieve the above object, off Irutayunitto is,
A casing (30) having an inlet (32), an outlet (36), and a dust outlet (34);
A filter part (35) that forms a path from the inlet or the outlet to the end fixing part (32a, 34a) in the housing part;
With
The filter unit includes, at least in part, a filter stretched in a swingable manner by air flowing into the housing unit from the inflow port,
The dust outlet is
Of the space in the housing part divided by the filter part, the space is located below the space on the side where the inflow port is located, and the space is opened.

  According to this, when air is blown from the inlet into the contaminated space (the space on the side where the inlet is located among the spaces in the housing part divided by the filter part), the air becomes turbulent air, The filter provided in the part swings.

  At this time, the fibers constituting the filter collect dust and the like in the air, but the lump of dust and the like becomes large due to the collection, and the shearing force and inertial force applied to the lump by the oscillation of the fiber is greater. If the fiber exceeds the force to hold the mass, the mass will peel from the fiber.

The separated lump of dust and the like falls to the dust discharge port and is collected, and the filter is free from clogging by the detachment of the lump of dust and the like.
That is, the filter unit of the present invention automatically drops from the filter when a lump of dust or the like attached to the filter becomes a predetermined size so that the filter is not clogged by swinging the filter. It is.

  Therefore, the filter unit of the present invention does not cause clogging of the filter, so that it is possible to save labor for maintenance such as replacement of the filter, and the filter does not need to be cleaned. .

Therefore, when the filter unit of the present invention is used, dust can be collected stably for a long period of time.
Further, in the filter unit of the present invention, when dust or the like that has increased in relation to the filter is peeled off from the filter, it is discharged from the dust discharge port.

Therefore, by collecting the dust that has fallen from the dust discharge port, it is possible to easily collect the dust that has been peeled off from the filter.
In addition, although the filter part has named generically the filter, the member which supports this filter, etc., as described at least partially, the whole filter part may be a filter.

When the inflow port or the outflow port is located on the upper side, the path formed by the filter unit may form a path from the inflow port or the outflow port to the dust discharge port in the housing.
Next, as the filter unit of the present invention, as a filter, a cylindrical filter formed in a cylindrical shape is used, and one end side in the axial direction is communicated with the inlet or outlet, and the other end side in the axial direction. May be stretched in the housing so as to be fixed to the end fixing portion.

  In the case where a path from the inlet to the end fixing part is formed in the casing, and the inlet is located on the upper side, the casing is arranged so that the other end in the axial direction is communicated with the dust outlet. You may make it stretch in a body part.

In this case, a path from the inlet to the end fixing part is formed simply by installing the cylindrical filter in the housing.
To the next, filter unit,
As the filter, a layered filter in which a plurality of filter materials are arranged in layers at predetermined intervals may be used.

In the case where the filter is a cylindrical filter, it is preferable to use a filter material in which filter materials having different diameters formed in a cylindrical shape are arranged coaxially.
When this layered filter is used, for example, dust of various sizes can be collected by each filter material, and the filter material does not clog, so that dust can be collected stably for a long period of time. it can.

  In addition, since each filter material is arranged at an interval in this layered filter, dust that falls off from the outer filter material falls in the space between the inner filter material and falls to the dust outlet. .

Next, as in the filter unit according to claim 4, there may be provided swinging means for swinging the filter by blowing air.
If this swinging means is used, even if dust or the like does not peel off from the filter by the force of the air blown from the inlet, the dust or the like can be peeled off by forcibly swinging the filter. it can.

As the filter, For example, hanging a filter material formed into a sheet having a 1 m × 1 m vertically, even when addressed airflow horizontal airflow 2m / sec, flexibility and lightness to be substantially horizontal with respect to the air stream It is preferable to use a filter made of a filter material having the property.

As the filter, For example, it is preferable to use a filter comprising a filter material which swings as long as the flow rate criticality Re number is 1 × 10 ³ ~2 × 10 ³ or more turbulent.

Next, a dust collector comprising a filter unit of the present invention, through the flow outlet, may be used those comprising a dust collecting blower means for discharging to the outside draws air inside the casing.

Further, as the dust collector comprising a filter unit of the present invention, through the dust discharge port, to be provided with a recovery means for recovering the recovered material is discharged from the interior of the casing. An example of the recovery means is a dust box, but is not limited thereto.

  Incidentally, the reference numerals in parentheses for each of the above means are examples showing the correspondence with the specific means described in the embodiments described later, and the present invention is indicated by the reference numerals in the parentheses of the above respective means. It is not limited to specific means.

It is a schematic diagram which shows the whole structure of the dust collector 1 of this embodiment, the internal structure is also shown about the filter unit 3, and the front view and side view are shown about each air blower. In addition, the arrow in a figure has shown the flow of air. It is a schematic diagram which shows a mode that dust remove | deviates from the filter raw material in the filter unit 3 of this embodiment. In addition, the arrow in a figure has shown the flow of air.

Embodiments of the present invention will be described below with reference to the drawings.
As shown in FIG. 1, the dust collector 1 of the present embodiment includes a filter unit 3, a dust collecting fan 5, and a pulsation forcing fan 7.

The filter unit 3 includes a housing 30 formed in a rectangular parallelepiped shape that is elongated in the vertical direction.
On the lower surface side of the center of the ceiling plate 31 that constitutes the ceiling portion of the housing 30, a shape in which the lower surface of the ceiling plate 31 is recessed upward is formed in a staircase shape that increases in diameter toward the lower side. An inflow port 32 is provided.

A fixing bracket 32 a is installed at each stage constituting the inflow port 32.
In addition, the filter unit 3 includes a dust box 4 that is housed in the lowermost part of the housing 30.

The dust box 4 is configured such that it can be taken in and out of the housing 30 through an extraction hole provided on a side surface (side surface along the vertical direction) of the housing 30 (not shown).
In addition, the filter unit 3 is provided with a bottom plate 33 that separates an upper portion and a lower portion from the position at a position a predetermined distance above the position where the dust box 4 is installed in the housing 30.

At the center of the bottom plate 33, there is provided a dust discharge port 34 formed in a stepped shape in which the bottom plate 33 is depressed downward and the diameter is increased toward the top.
A fixing bracket 34 a is installed at each stage constituting the dust discharge port 34. The fixing bracket 34a corresponds to the terminal fixing portion of the present invention.

  The filter unit 3 includes a cylindrical filter 35 in which filter materials having different diameters formed in a cylindrical shape are coaxially arranged. Regarding these filter materials, the inner filter material is referred to as a first filter material 35a, the central filter material is referred to as a second filter material 35b, and the outer filter material is referred to as a third filter material 35c.

The cylindrical filter 35 is a layered filter in which the filter materials 35a to 35c are arranged in layers at predetermined intervals.
And each filter material 35a-35c is the filter material 35a in the innermost step among each step which the edge part of the inflow port 32 and the dust discharge port 34 comprises, the filter material 35b in the outer step, and further outside. The filter material 35c is fixed to the stage. Thus, when the filter materials 35a to 35c are fixed in the housing 30, the cylindrical filter 35 forms a path from the inflow port 32 to the dust discharge port 34 in the housing 30, and its axial direction. One end side of the gas pipe communicates with the inflow port 32, and the other end side in the axial direction communicates with the dust discharge port 34.

  When the cylindrical filter 35 is stretched in the housing 30, the inside of the housing 30 includes a space inside the tubular filter 35 (path from the inlet 32 to the dust outlet 34), and a space outside the space. It will be divided into.

  In addition, since the cylindrical filter 35 has only both ends of the filter materials 35a to 35c in the axial direction fixed to the inlet 32 and the dust outlet 34 with fixing brackets (snap rings, fastening bands, etc.), When air is introduced into the housing 30 from the inflow port 32, the air is stretched by the air.

Further, the housing 30 is formed with an outflow port 36 for discharging the air in the housing 30 in one of the four side surfaces and in the vicinity of the upper portion of the bottom plate 33.
The casing 30 is formed with a pair of upper and lower entrance / exit holes 37 for entering and exiting air for forcibly swinging the cylindrical filter 35 on a side surface different from the surface where the outflow port 36 is provided. ing.

  The filter materials 35a to 35c are made of resin fibers having flexibility. As the resin fibers, polymer fibers such as polyester and nylon resins, or ultrafine fibers made of metal fibers such as stainless steel, for example, about 20 to 40 μm. A fiber having a fiber diameter and woven in a lattice shape is used.

A lattice has a fixed opening dimension, for example, the thing of the grid of about 100-200 micrometers can be used as a filter which removes dust.
The crossing portion of the lattice is woven so that the fibers do not shift, and does not change the opening size of the lattice due to displacement even under various use environment conditions.

The sheet-like material that is a fiber assembly made of ultrafine fibers has a tensile strength of, for example, about 100 N / 5 cm in the vertical and horizontal directions per unit length.
In the present embodiment, the sheet-like material is cylindrical or pleated and used as the filter material 35a to 35c for removing dust. The flexibility of the material is, for example, 1 m × 1 m hanging vertically. Even when a horizontal airflow of 2 m / sec is applied to the sheet, the sheet is light and flexible enough to make the sheet almost horizontal against the airflow.

Therefore, if the air flow velocity during use is a flow velocity that is a turbulent flow region having a critical Re number (about 1 × 10 ³ to 2 × 10 ³ ) or more, the filter materials 35a to 35c are subjected to wave contraction and oscillation. Thus, the adhering dust can be forcibly separated from the surfaces of the filter materials 35a to 35c and regenerated.

In this embodiment, in order to obtain the arbitrary efficiency required for dust collection, the filter materials 35a to 35c are concentrically arranged in multiple layers.
Next, the dust collection blower 5 is connected to the outlet 36 and draws air in the housing 30 and releases the drawn air into the atmosphere.

  When the dust collecting fan 5 is operated, contaminated air containing dust and the like is drawn into the housing 30 from the inlet 32, and the dust and the like are filtered by the cylindrical filter 35, and then discharged from the outlet 36 to the outside. Is done.

  Further, the pulsation forcing blower 7 is connected to the lower inlet / outlet hole 37 and the upper inlet / outlet hole 37 is connected to the inlet side so that the air can freely enter and exit from the housing 30. The cylindrical filter 35 is forcibly pulsated by blowing air on the 35.

Note that the pulsation forcing fan 7 may be included in the housing 30.
In the dust collector 1 configured as described above, when the dust collection blower 5 is operated, air is blown from the inlet 32 into the path from the inlet 32 formed by the cylindrical filter 35 to the dust outlet 34. .

Then, in the cylindrical filter 35, the air blown from the inflow port 32 becomes a turbulent air flow, and thereby swings.
At this time, the fibers constituting the filter materials 35a to 35c of the cylindrical filter 35 collect dust and the like in the air, but the lump of dust and the like becomes large due to the collection, and the lump is swung into the lump by the fiber swinging When the shearing force and the inertial force exceed the force for the fiber to catch the lump, the lump is peeled off from the fiber as shown in FIG.

  The separated lump of dust and the like falls into the dust box 4 through the dust discharge port 34 and is collected, and the clogging of the cylindrical filter 35 is eliminated by the detachment of the lump of dust and the like.

The clean air filtered by the cylindrical filter 35 is sucked from the inside of the housing 30 by the dust collecting fan 5 from the outflow port 36, passes through the dust collecting fan 5, and is released into the atmosphere.
That is, in the present embodiment, when the lump of dust or the like attached to the tubular filter 35 becomes a predetermined size so that the tubular filter 35 is not clogged by swinging the tubular filter 35, While automatically dropping from the mold filter 35, the contaminated air is filtered into clean air.

  Therefore, in the filter unit 3 of the present embodiment, the cylindrical filter 35 does not clog, so that maintenance such as replacement of the filter can be saved, and no cleaning of the filter is required. The filtration performance of the filter does not change for a long time.

Therefore, if the filter unit 3 of this embodiment is used, dust collection can be performed stably for a long period of time.
Further, in the present embodiment, the cylindrical filter 35 is used, and the one end side in the axial direction is communicated with the inflow port 32 and the other end side in the axial direction is communicated with the dust discharge port 34. Since it is stretched, a path from the inlet 32 to the dust outlet 34 is formed simply by installing the cylindrical filter 35 in the housing 30.

  Moreover, since the cylindrical filter 35 of this embodiment comprises the layered filter which formed several filter material 35a-35c in layers at predetermined intervals, for example, the filter material 35a from which the magnitude | size of the dust which can be collected differs When using ~ 35c, dust of various sizes can be collected by the filter materials 35a to 35b, and the filter materials 35a to 35c are not clogged. It can be performed.

  Further, in the cylindrical filter 35 which is also a layered filter, the filter materials 35a to 35c are arranged at intervals, so that dusts and the like which are peeled off from the outer filter material are immediately separated from the inner filter material. The space falls and deposits in the dust box 4 through the dust discharge port 34.

Therefore, by removing the dust box 4, dust and the like collected by the cylindrical filter 35 and deposited in the dust box 4 can be processed.
Further, in the dust collector 1 of the present embodiment, when the pulsation forcing fan 7 is used, even when dust or the like does not peel off from the cylindrical filter 35 only by the force of air blown from the inlet 32, the cylindrical filter By forcibly swinging 35, dust or the like can be peeled off.
[Other Embodiments]
Although the embodiment has been described above, it is needless to say that the invention described in the claims is not limited to the above embodiment and can take various forms.

(1) The dust collector 1 demonstrated by the said embodiment is an example to the last, and is not limited to this.
(2) In the above embodiment, the cylindrical filter is exemplified as a configuration corresponding to the filter portion of the present invention. However, the present invention is not limited to this. For example, a plurality of support columns are connected to the dust discharge port 34 from the inlet 32. A filter may be installed between the support columns.

Alternatively, a filter frame formed in a cylindrical shape with a plurality of holes may be provided with a support column between the inflow port 32 and the dust discharge port 34, and a filter is installed in each of the holes.
Further, a flat filter may be stretched in the housing.

(3) Although the three-layer cylindrical filter 35 has been described in the above embodiment, it may be one layer, two layers, or four or more layers.
(4) In the above embodiment, the example in which the cylindrical filter 35 forms a path from the inlet 32 to the dust outlet 34 has been described. However, the inlet 32 may be an outlet.

In this case, it is preferable that the cylindrical filter 35 has one end side in the axial direction communicating with the outflow port, and the other end side in the axial direction is fixed to the fixing bracket 32a (terminal fixing portion) and stretched in the casing portion.
In this case, the dust discharge port is provided not in the path formed by the cylindrical filter 35 but in a space outside the path and outside the cylindrical filter 35 in the housing. In this case, the dust discharge port is provided to open downward with respect to the space.

  (5) Each component of the present invention is conceptual and is not limited to the above embodiment. For example, the functions of one component may be distributed to a plurality of components, or the functions of a plurality of components may be integrated into one component. Further, at least a part of the configuration of the above embodiment may be replaced with a known configuration having the same function. In addition, at least a part of the configuration of the above embodiment may be added to or replaced with the configuration of the other embodiment.

DESCRIPTION OF SYMBOLS 1 ... Dust collector 3 ... Filter unit 4 ... Dust box 5 ... Dust collector blower 7 ... Pulsation forced blower 30 ... Housing 31 ... Ceiling plate 32 ... Inlet 32a ... Fixing metal fitting 33 ... Bottom plate 34 ... Dust discharge port 34a ... Fixed Metal fitting 35 ... Cylindrical filter 35a ... First filter material 35b ... Second filter material 35c ... Third filter material 36 ... Outlet 37 ... Entrance / exit hole

Claims (6)

A casing (30) having an inlet (32), an outlet (36), and a dust outlet (34) located below the inlet in the direction of gravity ;
Communicating with the inlet and the dust discharge port in the housing portion, a cylindrical filter unit which forms a non-clean space leading to the dust discharge port from said inlet (35), axially in the direction of gravity A tubular filter portion (35) that is stretched along the casing portion so as to be along and swingable by air containing dust flowing into the non-clean space from the inflow port ;
When the air containing dust flows into the non-clean space from the inlet, clean air from which dust has been removed by the cylindrical filter portion is discharged from the outlet,
The cylindrical filter part is
It is formed in a shape in which a plurality of filters with different diameters formed in a cylindrical shape are arranged coaxially,
In the dust discharge port,
Each opening on the lower side of the gravity direction of each filter is located,
A lump of dust that is collected and collected by each filter,
The filter unit according to claim 1, wherein the filter unit is discharged from each opening when the filter is separated from the filter by the swing . The filter unit according to claim 1 ,
A swinging means for swinging the cylindrical filter unit by blowing air to the cylindrical filter unit from the clean space side where the clean air passing through the cylindrical filter unit is located in the internal space in the housing unit ( 7) A filter unit comprising: The filter unit according to claim 1 or 2 ,
Each filter is
Hanging each filter formed into a sheet having a 1 m × 1 m vertically, when addressed airflow horizontal airflow 2m / sec, a filter unit, characterized in that it has a lightness and flexibility to be substantially horizontal. The filter unit according to any one of claims 1 to 3 ,
Each filter is
A filter unit that oscillates when the flow rate is a turbulent flow region having a critical Re number of 1 × 10 3 to 2 × 10 3 or more. A dust collector comprising the filter unit according to any one of claims 1 to 4 .
Dust collecting blower means for discharging to the outside crowded can pull through the front Symbol outlet air clean space that clean air that has passed is positioned the tubular filter portion of the internal space of the housing portion (5 ) Provided with a dust collector. A dust collector comprising the filter unit according to any one of claims 1 to 5 ,
A dust collector comprising a dust box (4) for collecting the collected matter in which the dust mass is discharged and accumulated from each opening .

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