JPH10176693A - Oil mist remover - Google Patents

Abstract

PROBLEM TO BE SOLVED: To separate and trap larger particles of oil mist included in gas in the larger-particle separation/trap chamber of an oil mist remover. SOLUTION: A housing 1 is formed with a suction port 2, a discharge port 3, and a vent passage 4 for connecting the suction port 2 and the discharge port 3 to each other. The vent passage 4 is provided midway with a larger- particle separation/trap chamber 5 for separating and trapping larger particles including oil mists, sections and grinding wheel powders from gas including oil mists, and a smaller-particle separation/trap chamber 7 for separating and trapping smaller particles of oil mist from the gas by the centrifugal force of fans 6 being rotated. The larger-particle separation/trap chamber 5 and the smaller-particle separation/trap chamber 7 hold a filter 8 therebetween. The filter 8 is arranged over an opening formed through one side of the larger- particle separation/trap chamber 5, and the suction port 2 is formed through a side of the larger-particle separation/trap chamber 5 diagonally facing the one side thereof where the filter 8 is arranged.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil mist removing device for removing and capturing oil mist.

[0002]

2. Description of the Related Art Japanese Patent Publication No. 7-18434 discloses a device for removing and capturing oil mist. The device disclosed in Japanese Patent Publication No. 7-18434 is shown in FIG. 9 in which a box 1 is provided with a suction port 2 and a discharge port 3, and the box 2 is provided with the suction port 2 and the discharge port. An air passage 4 communicating with the air passage 3 is formed. Further, a front chamber 51 in which a cylindrical filter 50 is disposed in the ventilation path 4 and a separation / capture chamber 52 in which a fan 6 for separating and capturing oil mist by centrifugal force are provided. A partition wall is provided between the front chamber 51 and the separation and capture chamber 52, and a central opening 53 communicating the front chamber 51 and the separation and capture chamber 52 is provided at the center of the partition wall. The rear edge of the cylindrical filter 50 covers the periphery of the central opening 53, and the front edge of the cylindrical filter 50 is in contact with the side surface of the front chamber 51 facing the partition wall. Installed. Further, an inlet 2 is provided on a side surface of the box 1 which is orthogonal to the axial direction of the cylindrical filter 50. By rotating the fan 6, gas containing oil mist generated from a lathe or a grinding machine, which is a source of oil mist, is sucked from the suction port 2. The air is sucked from the filter 50 while flowing along the outer peripheral surface of the filter 50 as shown by the arrow in FIG. 9, reaches the center of the front surface of the fan 6 from the central opening, and centrifugally acts on the outer periphery along the front surface of the fan 6. The oil mist is captured by colliding with the inner wall surface of the separation capturing chamber 52, and at this time, the gas is changed in direction and flows.

[0003]

In the conventional example described above, the gas containing the oil mist sucked from the suction port 2 is a filter in which the flow direction of the gas from the suction port 2 is cylindrical. Since the direction is parallel to the tangential direction of the outer peripheral surface of the filter 50, the liquid is sucked from the suction port 2 along the outer peripheral surface of the cylindrical filter 50 and flows into the filter 50. The gas containing the mist does not collide effectively, and before entering the filter 50, it effectively collides with the side wall of the front chamber 51 to remove large particles such as oil mist having a large particle diameter, cutting chips, grinding stone powder and the like. Not designed to separate. Therefore, in the above conventional example, trapping of oil mist and the like in the front chamber 51 is mainly performed only by the filter 50. For this reason, conventionally, oil mist is trapped by gas mainly by trapping by the filter 50 and separation and trapping by centrifugal force due to the next rotation of the fan 6, and trapping of oil mist. The effect cannot be said to be sufficient yet, and large particles such as oil mist having a large particle diameter contained in the gas, cutting chips and grinding stone powder are suddenly captured by the filter 50. There is a problem that clogging is likely to occur.
There is a problem that the period until cleaning and replacement of the zero is shortened.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and is a first step of separating and capturing oil mist contained in a gas in a large particle separation and capture chamber in which large particles are captured. Can be separated and captured by the filter, the second stage can be separated and captured by the filter, and the third stage can be separated and captured by centrifugation by a fan. It is another object of the present invention to provide an oil mist removing device that can perform the cleaning and replace the filter with a longer period.

[0005]

In order to solve the above-mentioned problems, an oil mist removing device according to the present invention comprises a box 1 having an inlet 2
And a discharge port 3, and a ventilation path 4 communicating between the suction port 2 and the discharge port 3 is formed in the box 1.
In the middle of the process, a large particle separation / capture chamber 5 for separating and capturing large particles such as oil mist having a large particle diameter, cutting chips and grinding stone powder from a gas containing oil mist, A small particle separation and capture chamber 7 for separating and capturing an oil mist having a small particle diameter from a gas by centrifugal force, and a filter 8 disposed between the large particle separation and capture chamber 5 and the small particle separation and capture chamber 7; The filter 8 is disposed at an opening provided on one side surface of the large particle separation / capture chamber 5.
The suction port 2 is provided on a side surface in a direction intersecting with one side surface on which the filter 8 is disposed. With such a configuration, when the fan 6 is rotated, the gas containing oil mist flows from the suction port 2 into the large particle separation / capture chamber 5, and the side portion of the large particle separation / capture chamber 5 facing the suction port 2. Collides with and turns, and the suction port 2
The gas that collides with the side surface of the large particle separation / trapping chamber 5 facing and turns and turns and turns toward the front side of the filter 8 so as to further turn sideways, thus repeatedly By turning and turning, large particles, such as oil mist, chips, and grindstones, contained in the gas and having a large particle size are shaken off from the gas and separated. Then, in the large particle separation / capture chamber 5, the gas in which large particles such as oil mist having a large particle diameter contained in the gas and chips or grinding stone powder are separated and captured is then filtered by the filter 8. The oil mist having a medium particle diameter is separated and captured, and then flows into the small particle separation and capture chamber 7, where the oil mist having a small particle diameter is separated and captured from the gas by the centrifugal force of the fan 6.

Further, a metal plate 9 having a filter 8 having a substantially U-shaped cross section and being elongated in the opening direction of the suction port 2 is provided side by side.
It is also preferable that the channel is formed by forming a substantially U-shaped channel 10, and that the front half of the channel 10 is inclined with respect to the front surface of the filter 8. With such a configuration, the gas containing oil mist flows from the suction port 2 into the large particle separation / capture chamber 5 and collides with the side of the large particle separation / capture chamber 5 facing the suction port 2 to turn. Further, the gas swirled by colliding with the side surface of the large particle separation / trapping chamber 5 facing the suction port 2 is swirled so as to turn further sideways toward the front side of the filter 8. When the gas swirls to turn further to the front of the filter 8, the gas does not flow in a direction perpendicular to the front of the filter 8, but in an oblique direction with respect to the front of the filter 8. As a result, the angle of the direction change at the time of turning becomes steep, and the efficiency of shaking off large particles such as oil mist with large particle size and cutting chips and grinding stone powder contained in the gas from the gas by turning is increased. Will be improved. Then, when the gas flowing from the front surface of the filter 8 flows through the substantially channel-shaped channel 10, the gas collides with the metal plate 9 that constitutes the side wall of the channel 10, whereby a medium The oil mist having the particle size of is separated and captured.

A plurality of filters 8 are arranged in parallel in the gas flow direction. The front filter 8 is constituted by a filter 8a having a bent channel formed by bending a metal plate 9, and the rear filter 8 is formed of a nonwoven fabric. It is also preferable that the filter 8b is made of a filter 8b. With such a configuration, in the large particle separation / capture chamber 5, the gas in which large particles such as oil mist having a large particle diameter, cutting chips, grinding stones, and the like contained in the gas have been separated and captured is filtered by the filter 8. When the oil mist having a medium particle size is separated and captured, first, the metal plate 9
The filter 8a having a bent flow path formed by bending the flow path collides with the metal plate 9 constituting the bent flow path when flowing through the bent flow path, thereby separating the oil mist having a medium particle diameter. In addition to the trapping, even if chips or whetstone powder or the like flows toward the filter 8a without being completely trapped in the large particle separation / trapping chamber 5, it can be trapped by collisional separation with the metal plate 9, and thus large particles can be trapped. Since the chips and grindstone powder remaining in the separation and capture chamber 5 are surely separated and captured by the filter 8a having the bent flow path formed by bending the metal plate 9, the gas is passed through the filter 8b made of nonwoven fabric. The filter 8b made of a nonwoven fabric is not clogged with cutting chips or grinding stone powder.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the embodiments shown in FIGS. The box 1 has a rectangular shape in vertical cross section. As shown in FIGS. 1 to 3, an inlet 2 and an outlet 3 are provided on the outer surface of the box 1. A small particle separation / capture chamber 7 is provided in the part, a large particle separation / capture chamber 5 is provided in the middle part, and a muffling / capture chamber 11 and a motor storage chamber 12 are provided in a part of the rear part. A filter storage chamber 13 is provided between the small particle separation and capture chamber 7 and the large particle separation and capture chamber 5. The suction port 2 opens and communicates with the small particle separation / capture chamber 7, and the discharge port 3 opens and communicates with the sound deadening / capture chamber 11. The suction port 2 → the large diameter particle separation / capture chamber 5 → the filter Storage room 13 → Small particle separation and capture room 7
A path through which gas flows, namely, the muffling / capture chamber 11 → the discharge port 3, is a ventilation path 4 for communicating between the suction port 2 and the discharge port 3.

The front side (ie, the front surface of the box 1) of the small particle separation / trapping chamber 7 formed at the front portion of the box 1 has an opening 14 substantially over the entire surface. A front lid 15 is detachably attached to 14 with screws 16. By attaching the front lid 15, the front side surface of the small particle separation / capture chamber 7 is constituted by the front lid 15. Almost the entire side surface of the small particle separation / trapping chamber 7 facing the front lid 15 (that is, the rear side surface) is also an opening 17,
The filter 8 is disposed in the opening 17. A suction port is provided on one of the other four side surfaces (that is, the four side surfaces of the small particle separation / trapping chamber 7 in the direction intersecting the side surface on which the filter 8 is arranged) (that is, the four side surfaces of the upper, lower, left and right excluding the front and rear). 2 are provided. In the embodiment shown in the accompanying drawings, a suction port 2 is provided on the upper side surface of the small particle separation / capture chamber 7, and the suction port 2 is further provided on one of the left and right ends of the upper side surface. It is formed shifted.

[0010] In the filter storage chamber 13, the filter support 1
The filter support 18 is provided with a filter 8.
However, it is detachably mounted by the so-called Kendon type.
Here, when attaching and detaching the filter 8,
The front cover 15 facing the opening 17 is removed, the opening 14 is opened, and the filter 8 is mounted and removed.

A plurality of filters 8 are arranged side by side in the gas flow direction. And the previous filter 8 is a metal plate 9
Is formed by a filter 8a having a bent flow path formed by bending the filter, and the rear filter 8 is formed by a filter 8b made of a nonwoven fabric. Here, in the embodiment shown in the accompanying drawings, as shown in FIG. 2, a filter 8a having a bent flow path formed by bending a metal plate 9 has a substantially U-shaped cross section and an opening of the suction port 2. A metal plate 9 elongated in the direction (in the embodiment, the metal plate 9 elongated in the vertical direction because the suction port 2 is on the upper side portion) is juxtaposed to form a substantially elliptical channel. 10 is formed. The front half of the channel 10 is inclined with respect to the front surface of the filter 8.

The filter storage chamber 13 and the large particle separation / capture chamber 5
A partition plate 20 is provided between the partition plate 2 and the entrance 21 provided at substantially the center of the front surface of the large particle separation and capture chamber 5.
0 is open at the center. Large particle separation and capture chamber 5
The casing 22 constituting the outer shell has a circular vertical cross section, and houses the fan 6 and the guide blade 23 inside.

As shown in FIGS. 5 and 6, the fan 6 has a disk 25 fixed to a motor shaft 24, and a ring-shaped plate 27 having an opening 26 at the center in front of the disk 25. Are arranged to face each other, and a plurality of blades 28 bent in a V-shape as viewed from the front are radially provided between the ring-shaped plate portion 27 and the disk portion 25. Here, the blade portion 28 bent in a rectangular shape
The outer portion 28b of the blade portion 28 is bent outward in the shape of a letter, and the outer portion 28b of the blade portion 28 is bent outside the bent portion 28a.
8b is twisted with respect to the inner portion 28c relative to the bent portion 28a, and is inclined so that the front edge 28d and the rear edge 28e of the outer portion 28b are shifted from the bent portion 28a in the rotational direction. is there. Here, the bent portion 28 of the blade portion 28
Although a is a straight line, the cross section of the outer portion 28b beyond the bent portion 28a is a straight line, but the bent portion 28a may be formed in an arc shape, and the cross section of the outer portion 28b may be formed in an arc shape beyond the bent portion 28a. is there. The opening 26 at the center of the ring-shaped plate 27 of the fan 6 faces the inlet 21 provided in the partition plate 20.

The guide blade body 23 has a large-diameter rear plate 31 having a hole 30 at the center and a front plate 32 having a smaller diameter than the large-diameter rear plate 31, and a guide blade 23 is provided between the front plate 32 and the rear plate 31. The part 33 is constructed by being erected. The casing 22 is formed by connecting a plurality of divided casing bodies 34 with bolts and nuts. When the divided casing bodies 34 are connected to each other, the outer peripheral end of the rear plate 31 of the guide blade 23 is divided into divided casing bodies 34. The guide vane 23 is attached by being sandwiched between the guide vanes 23, and the guide vane 23 thus attached is located behind the fan 6. The hole 30 at the center of the rear plate 31 faces the opening 26 of the fan 6 adjacent to the rear. At the rear end of the rearmost divided casing body 34, there is provided a communication portion 35 that communicates with the silencing / capturing chamber 11.

The silencing / capturing room 11 includes a front room 11a and a rear room 1
1b, and a silencing filter 36 made of a tubular nonwoven fabric is disposed in the rear chamber 11b. The front end of the silencing filter 36 made of a tubular nonwoven fabric is the front chamber 11.
a and a rear end of the rear chamber 11b, which is detachably fitted into an annular fitting portion 11d provided on a partition 11c for partitioning the rear chamber 11b.
It is supported by a rear lid 37 which is detachably attached to the opening on the rear surface. The annular fitting portion 1 of the partition 11c
A hole 11e formed in a portion surrounded by 1d communicates with a front opening of the silencing filter 36 having a cylindrical shape.

A motor 40 is housed in the motor housing 12, and the motor shaft 24 of the motor 40 is
The fan 6 is attached to the motor shaft 24 as described above. As shown in FIGS. 1 and 2, a support frame 41 is provided on the lower surface of the box 1, and an oil pan 42 is attached to the support frame 41 so as to be able to be pulled out. Discharge holes 43 are provided at a plurality of locations on the lower surface of the box 1, for example, at locations corresponding to the bottom portion of the large-diameter particle separation / capture chamber 5, the filter storage chamber 13, and the small-particle separation / capture chamber 7. The oil trapped in the particle separation trapping chamber 5, the filter storage chamber 13, and the small particle separation trapping chamber 7 is discharged to the oil pan 42 through the discharge hole 43 and collected in the oil pan 42. At the time of maintenance or the like, the oil pan 42 is pulled out to perform maintenance or the like. Here, since the oil pan 42 can be pulled out for maintenance, it is possible to prevent the oil discharge port 44 of the oil pan 42 from being clogged when highly viscous oil is captured.

Thus, the oil mist generated from the oil mist generating source such as a lathe or a grinding machine is removed by the oil mist removing device having the above-described configuration. The removal of the oil mist according to the present invention is as follows. It is done as follows. That is, the motor 40 is rotated and the fan 6
When the is rotated, gas containing oil mist flows into the large particle separation / trapping chamber 5 from the suction port 2 via a hood (not shown) and a duct (not shown). The gas containing oil mist that has flowed into the large particle separation and capture chamber 5 from the inlet 2 collides with the side of the large particle separation and capture chamber 5 that faces the side where the inlet 2 is provided. The gas swirled as indicated by the arrow 1 b, and colliding with the side of the large particle separation / trapping chamber 5 facing the suction port 2 to change direction and swirled further toward the front side of the filter 8. By turning so as to change the direction to the side (arrows B in FIGS. 1 and 2), by turning many times in this way and colliding with the side surface, the particle size contained in the gas is obtained. Large particles such as oil mist, chips, and grindstone powder are shaken off from the gas and separated.

Here, as shown in FIG. 2, a metal plate 9 in which the filter 8 has a substantially U-shaped cross section and is elongated in the opening direction of the suction port 2 is arranged side by side to form a substantially V-shaped V-shape. The flow path 10 is formed in such a manner that the front half of the H-shaped flow path 10 is inclined with respect to the front surface of the filter 8, so that the gas flows further toward the front surface of the filter 8. When swirling to change the direction, the gas does not flow at right angles to the front surface of the filter 8 as shown by arrow C in FIG. From the gas, the angle of the direction change at the time of turning becomes steep, and the turning makes the efficiency to shake off large particles such as oil mist and cutting chips and grinding stone powder contained in the gas from the gas. It is getting better.

By turning the gas a number of times as described above and swirling it, the gas in which large particles such as oil mist having a large particle size, cutting chips, grinding stones and the like are shaken off is then filtered by the filter 8. In the present invention, the filter 8a first passes through a filter 8a having a bent flow path formed by bending a metal plate 9, and then passes through a filter 8b made of a nonwoven fabric.
, And then flows into an inlet 21 provided substantially at the center of the front surface of the large particle separation / capture chamber 5.

Here, when the gas passes through the filter 8a having the bent flow path, the gas collides with the metal plate 9 constituting the side wall of the serpentine flow path 10 due to the baffle effect,
As a result, an oil mist having a medium particle size is separated and captured. In this case, due to the direction change of the gas in the large particle separation / capture chamber 5 many times, large particles such as oil mist having a large particle diameter and chips or grinding stone powder contained in the gas are shaken off and separated. However, at this time, even if some chips and grindstone powder are contained in the gas and flow into the filter 8 without being separated, the collision with the metal plate 9 and the direction change when flowing through the bent flow path are performed. As a result, the remaining chips and grindstone powder are separated from the gas, and the gas from which the chips and grindstone powder have been separated flows into the filter 8b made of non-woven fabric. Oil mist is captured. Since the chips and grindstone powder are separated before reaching the filter 8b made of nonwoven fabric as described above, the filter 8b made of nonwoven fabric is not clogged by the chips and grindstone powder, and therefore, Cleaning of the filter 8b,
It is possible to lengthen the period until exchange or the like.

As described above, large particles such as oil mist having a large particle diameter, cutting chips, grinding stones, etc. are shaken off, and gas removed by capturing medium oil mist is removed from the large particle separation and capture chamber 5. Oil mist having a small particle diameter flows into an inlet 21 provided at a substantially central portion of the front surface portion and is separated and captured from gas by centrifugal force generated by rotation of the fan 6 in the large particle separation and capture chamber 5.

That is, the gas flowing from the inlet 21 flows through the opening 26 at the center of the ring-shaped plate portion 27 of the fan 6 between the ring-shaped plate portion 27 and the disk portion 25 of the fan 6, and is shaped like a letter. In this case, since the bent portion 28a is provided in the blade portion 28, the flow direction of the gas including the oil mist can be changed by the baffle effect of the V-shaped blade portion 28. While colliding with the wings 28b, the oil mist having a small particle diameter is agglomerated and separated from the gas, and the wings 28 bent in a rectangular shape form the bent portion 2
8a, the outer portion 28b projects outward beyond the outer peripheral end of the disk portion 25. Also, the outer portion 28b of the blade portion 28 bent in a V-shape is located outside the bent portion 28a. Is also twisted against the inner part 28c,
Since the front end edge 28d and the rear end edge 28e of the outer portion 28b are displaced from the bent portion 28a with respect to the rotation direction so that the front end edge 28d and the rear end edge 28e are displaced, aggregates of oil mist that is heavier than gas are generated by centrifugal force of the fan 6. The gas is blown toward the outer periphery of the fan 6 and collides with the outer peripheral portion 28b of the fan 6 to be separated and captured from the gas. The air is guided rearward by 28b and flows through the guide blades 33 of the guide blade 23 to the next opening 26 of the fan 6. In the same manner, the gas flowing to the next fan 6 captures oil mist having a small particle diameter.

As described above, large particles such as oil mist having a large particle diameter, cutting chips, grinding stones, and the like are shaken off in the large particle separation and capture chamber 5, and a medium oil mist is removed by the filter 8. The gas from which the oil mist having a small particle size has been removed by the centrifugal force generated by the rotation of the fan 6 flows from the communicating portion 35 into the front chamber 11a of the silencing / capturing chamber 11, and from the hole 11e, a silencing filter made of a tubular nonwoven fabric. The noise flows into the inside of the filter 36, flows out of the surroundings of the silencing filter 36 made of a tubular nonwoven fabric, and is discharged to the outside through the discharge port 3. Here, when the gas passes through the silencing filter 36 from the inside to the outside, the sound is silenced and the oil mist is captured in the final stage.

The oil mist captured in the large-diameter particle separation / capture chamber 5, the filter storage chamber 13, and the small-particle separation / capture chamber 7 aggregates and flows along the inner wall of each chamber. Is to be collected. FIG. 7 shows another embodiment of the present invention. In the present embodiment,
The large particle separation / trapping chamber 5 has an inverted trapezoidal vertical section, and the filter 8 is attached to the opening provided on one inclined side surface of the large particle separation / trapping chamber 5 having the inverted vertical trapezoidal shape. Examples are shown. In this way, the gas containing oil mist flowing into the large particle separation / capture chamber 5 from the inlet 2 collides with the side of the large particle separation / capture chamber 5 facing the inlet 2 and turns. When the gas colliding with the side surface of the large particle separation / trapping chamber facing the suction port 2 changes direction and turns, the turbulent flow occurs when the gas turns further toward the front side of the filter 8 and turns. The swirling flow accompanied by the gas is generated more effectively, and large particles such as oil mist having a large particle diameter contained in the gas and chips or grinding stones are more effectively shaken off from the gas and separated. Will be.

FIG. 8 shows an embodiment in which the suction port 2 is further provided with a guide vane 2a. The guide vane 2a is provided at the edge of the suction port 2 on the side close to the filter 8, and thus the guide vane 2a is provided. By providing 2a, gas containing oil mist flowing into the large particle separation / capture chamber 5 from the suction port 2 can be reliably prevented from short-passing to the filter 8, and the efficiency of swirling flow separation can be increased. It is.

[0026]

According to the first aspect of the present invention, as described above, the suction port and the discharge port are provided in the box body, and the box body communicates with the suction port and the discharge port. A large particle separation and capture chamber for separating and capturing large particles such as oil mist having a large particle diameter and cutting chips or grinding stone powder from a gas containing oil mist in the middle of the ventilation path; A small particle separation / capture chamber is provided for rotating the fan to separate and capture oil mist having a small particle diameter from the gas by the centrifugal force of the fan, and a filter is provided between the large particle separation / capture chamber and the small particle separation / capture chamber. The filter is disposed at an opening provided on one side of the large particle separation and capture chamber, and the suction port is provided on a side of the large particle separation and capture chamber in a direction intersecting the one side where the filter is disposed. Flow from the inlet to the large particle separation / capture chamber. Gas containing Rumisuto pivots collides with the side surface portion of the large particle separation capture chamber facing the inlet port,
Further, the gas that collides with the side surface of the large particle separation / trapping chamber opposite to the suction port and changes direction to swirl further turns sideways toward the front side of the filter. By turning again and turning, large particles such as oil mist and cutting chips and grinding stones contained in the gas are shaken off from the gas and separated, and the filter placed in the ventilation path thereafter And the like can eliminate clogging due to cutting chips, grinding stone powder, and the like, and can prolong the cycle of cleaning and replacing the filter. In addition, in the large particle separation / capture chamber, the medium in which large particles such as oil mist and chips such as cutting chips and grindstones contained in the gas are separated and captured in the gas is then subjected to a medium filter by a filter. An oil mist having a particle diameter is separated and captured, and then, in a small particle separation and capture chamber, an oil mist having a small particle diameter can be separated and captured from a gas by centrifugal force of a fan. Oil mist can be effectively separated and captured in order from the one having a larger diameter.

According to a second aspect of the present invention, in addition to the effects of the first aspect, a metal plate having a substantially rectangular cross section and a lengthened in the opening direction of the suction port is provided. Are arranged side by side to form a substantially U-shaped channel, and the front half of the channel is inclined with respect to the front surface of the filter. When the gas changes direction several times in the chamber and finally flows into the front of the filter, i.e., the last swirl to turn further to the front of the filter, the gas is Instead of flowing in a direction perpendicular to the front surface, it flows obliquely to the front surface of the filter, and the angle of change of direction when turning is sharpened. Large particles such as large oil mist, chips and grinding stones Efficiency shaken off from the gas is intended to be improved. Moreover, the gas flowing from the front of the filter collides with the metal plate constituting the side wall of the elliptical flow path when flowing through the substantially elliptical flow path, thereby forming a medium-sized particle. Oil mist is separated and captured.

According to the third aspect of the present invention, in addition to the effects of the first or second aspect of the present invention, a plurality of filters are juxtaposed in the gas flow direction, and Since a filter with a bent channel formed by bending a metal plate is used, and a filter at the back is made of a non-woven fabric filter, some chips and grindstone powder are captured in the large particle separation and capture chamber. Even if it is left, first, when flowing through the bent flow path of the filter having the bent flow path formed by bending the metal plate, it collides with the metal plate constituting the bent flow path, thereby While separating and capturing the oil mist of the particle size, it was possible to capture the cutting chips and grindstone powder etc. remaining in the gas by impact separation on the metal plate, and as a result, the large particles separation and capture chamber thus remained. Bending metal plate with cutting chips and grinding stone powder After the gas is reliably separated and captured by the filter having the bent flow path formed by flowing, the gas is caused to flow through the filter made of the nonwoven fabric, so that the filter made of the nonwoven fabric is not clogged with cutting chips or grinding stone powder. .

[Brief description of the drawings]

FIG. 1 is a front sectional view of the present invention.

FIG. 2 is a sectional view taken along line XX of FIG.

FIG. 3 is a partially exploded perspective view showing the whole of the same as viewed from the front side.

FIG. 4 is a partially omitted perspective view of the same as viewed from the rear side.

FIG. 5 is a perspective view of an embodiment of the fan used in the embodiment.

FIG. 6 is a sectional view of the same.

FIG. 7 is a schematic explanatory view showing an example of an arrangement of a filter arranged in an opening of a large particle separation / capture chamber according to another embodiment of the present invention.

FIG. 8 is a schematic explanatory view of still another embodiment of the above.

FIG. 9 is a partially broken perspective view of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Box 2 Inlet 3 Outlet 4 Ventilation path 5 Large particle separation capture chamber 6 Fan 7 Small particle separation capture chamber 8 Filter 8a Filter having a bent channel 8b Filter made of non-woven fabric 9 Metal plate 10 Channel-shaped channel

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[Procedure amendment]

[Submission date] December 8, 1997

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0008

[Correction method] Change

[Correction contents]

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the embodiments shown in FIGS. The box 1 has a rectangular shape in vertical cross section. As shown in FIGS. 1 to 3, an inlet 2 and an outlet 3 are provided on the outer surface of the box 1. large particle separation capture chamber 5 is provided with the parts, small in the intermediate portion
Is provided with a particle separator capturing chamber 7, further comprising: a rear silencer and acquisition chamber 11 to a portion of the motor housing chamber 12 is provided with a large
A filter storage chamber 13 is provided between the particle separation and capture chamber 5 and the small particle separation and capture chamber 7 . And the inlet 2 is a large particle
The opening and communication with the separation and capture chamber 5 and the discharge port 3 with and open to the sound deadening / capture chamber 11, the suction port 2 → the large diameter particle separation and capture chamber 5 → the filter storage chamber 13 → the small particle separation and capture Room 7
A path through which the gas flows, namely, the muffling / capture chamber 11 → the discharge port 3, is formed as a ventilation path 4 for communicating between the suction port 2 and the discharge port 3.

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0009

[Correction method] Change

[Correction contents]

[0009] Large particle separation and trapping formed at the front portion in the box 1
The front side surface of the trapping chamber 5 (that is, the front surface of the box body 1) has an opening 14 on almost the entire surface, and a front lid 15 is detachably attached to the opening 14 with a screw 16; By attaching the front cover 15, the front side surface of the large particle separation / capture chamber 5 is constituted by the front cover 15. Large particles
Almost the entire side surface of the separation / capturing chamber 5 facing the front lid 15 (that is, the rear side surface) is also an opening 17,
The filter 8 is disposed in the opening 17. Large particles
The suction port 2 is provided on one of the other four side surfaces (i.e., four upper, lower, left, and right side surfaces excluding the front and rear sides) which are side surfaces in a direction intersecting with the side surface on which the filter 8 is disposed in the separation / acquisition chamber 5. It is provided. Large particles was in the embodiment shown in the accompanying drawings
The suction port 2 is provided in the upper side surface of the separation / acquisition chamber 5 , and the suction port 2 is formed so as to be shifted to one of the left and right ends of the upper side surface.

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0012

[Correction method] Change

[Correction contents]

Filter storage chamber 13 and small particle separation / capture chamber 7
It is is provided with a partition plate 20, the small particle separation trapped between the
The entrance 21 provided substantially at the center of the front part of the chamber 7 is the partition plate 2.
0 is open at the center. Small particle separation capture chamber 7
The casing 22 constituting the outer shell has a circular vertical cross section, and houses the fan 6 and the guide blade 23 inside.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0019

[Correction method] Change

[Correction contents]

By turning the gas a number of times as described above and swirling it, the gas in which large particles such as oil mist having a large particle size, cutting chips, grinding stones and the like are shaken off is then filtered by the filter 8. In the present invention, the filter 8a first passes through a filter 8a having a bent flow path formed by bending a metal plate 9, and then passes through a filter 8b made of a nonwoven fabric.
, And then flows into an inlet 21 provided substantially in the center of the front surface of the small particle separation and capture chamber 7 .

[Procedure amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0021

[Correction method] Change

[Correction contents]

As described above, large particles such as oil mist having a large particle diameter, cutting chips, grinding stones, etc. are shaken off, and gas removed by capturing medium oil mist is separated and captured by small particles.
Flows into the inlet 21 is formed at almost the center of the front face of 捉室7, less oil mist from the gas particle sizes is to be separated captured by the centrifugal force generated by the rotation of the fan 6 in the small particle separation capture chamber 7.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Shinichi Kobayashi 1-20-19 Shimanouchi, Chuo-ku, Osaka City Co., Ltd. (72) Inventor Akira Yamada 1-20-19 Shimanouchi, Chuo-ku, Osaka Co., Ltd. In Craco

Claims (3)

[Claims] An air inlet and an outlet are provided in a box, an air passage communicating between the inlet and the outlet is formed in the box, and an oil mist is included in the middle of the air passage. A large particle separation / capture chamber for separating and capturing large particles such as oil mist with large particle size, cutting chips and grinding stone powder from gas, and rotating the fan to remove oil mist with small particle size from gas by centrifugal force of the fan. An opening provided on one side of the large particle separation and capture chamber, wherein a filter is provided between the large particle separation and capture chamber and the small particle separation and capture chamber. An oil mist removing device, wherein the suction port is provided on a side surface in a direction intersecting with one side surface where the filter of the large particle separation / capture chamber is disposed. 2. A filter having a substantially U-shaped cross section and a metal plate elongated in the opening direction of the suction port arranged side by side to form a substantially U-shaped flow passage. An oil mist removing device, wherein the front half of the channel is inclined with respect to the front surface of the filter. 3. A filter in which a plurality of filters are juxtaposed in a gas flow direction, a front filter is constituted by a filter having a bent flow path formed by bending a metal plate, and a rear filter is constituted by a filter made of nonwoven fabric. The oil mist removing device according to claim 1 or 2, wherein: