JP2951839B2 - Oil mist removal device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a centrifugal separation type oil mist removing device for separating oil mist of mist-containing air from air by centrifugal force to form oil droplets.

[0002]

2. Description of the Related Art In a conventional oil mist removing apparatus, mist-containing air is sucked from a suction duct into a separation chamber through a rectifying chamber by rotation of an electric fan unit, and mist-containing air is supplied to a rotary filter mounted on the electric fan unit. The oil mist is turned into oil droplets through the outlet to be discharged from the outlet. A representative example of such an oil mist removing device is disclosed in Japanese Patent Publication No. 55-38172.

[0003] The oil mist removing device disclosed in this publication is characterized in that mist-containing air is sucked from a suction duct into a rectification chamber having a flow path cross-sectional area larger than the flow path cross-sectional area of the suction duct by rotation of an electric fan unit. The air is rapidly expanded and turbulent in the rectification chamber. Then, a part of the turbulent mist-containing air flows backward and collides with the inner wall surface of the rectification chamber, whereby the oil mist is turned into oil droplets. Further, the mist-containing air passing through a collecting plate (referred to as a protective lath in the publication) arranged for removing chips and the like sucked into the separation chamber from the rectification chamber is removed in the separation chamber. Since the flow surface radially spreads in a direction orthogonal to the rotation axis of the electric motor and passes through the rotation filter mounted on the rotation shaft, the oil mist is turned into oil droplets in the rotation filter. The oil mist that has been turned into oil droplets in the rotary filter is blown to the inner wall surface of the casing by centrifugal force, and is discharged from the oil adsorbent layer disposed on the inner wall surface of the casing through the baffle plate to the outside through the outlet. It has become.

On the other hand, such an oil mist removing device includes a centrifugal impeller in which moving blade rows are regularly arranged at intervals in a circumferential direction and mounted on a rotating shaft of an electric motor; Are fixedly arranged at regular intervals in the circumferential direction and are supported by the casing. The centrifugal impellers and the fixed impellers are alternately arranged in the axial direction of the electric motor. Some use an electric fan unit having a car. A typical example of such an oil mist removing device is disclosed in Japanese Patent Application Laid-Open No. Hei 4-4013.

The oil mist removing device of this publication has a structure in which a plurality of centrifugal impellers are arranged at intervals on a rotating shaft of an electric motor, and fixed impellers are individually arranged between these centrifugal impellers. . In addition, the blades and vanes of each impeller are bent into a shape that exhibits a substantially rectangular shape from the outside in the radial direction, and a spiral oil discharge groove is formed on the inner peripheral wall surface of the casing that supports the fixed impeller. ing. And the conventional oil mist removal device having such a structure,
The mist-containing air sucked into the separation chamber from the suction duct by the rotation of the electric fan unit spreads radially perpendicular to the rotating shaft of the electric motor by the centrifugal impeller and collides with the inner peripheral wall surface of the casing, and then passes through the fixed impeller. Therefore, the oil mist that has been turned into oil droplets in the felt arranged on the outer peripheral surface of each impeller is blown to the inner peripheral wall surface of the casing by centrifugal force, passes through the spiral groove on the wall surface, and the radially outer side of the fixed impeller. It is discharged to the outside from a discharge port formed in the flange portion of the casing.

[0006]

In the conventional oil mist removing device, the oil mist formed into oil droplets is blown by centrifugal force to the inner peripheral wall of the casing having the oil adsorbent layer and the spiral groove, and is discharged by the wind pressure of the fan. It is structured to flow to the outlet. Certainly, if a flow path for discharging oil mist formed into oil droplets is provided, it is thought that the efficiency of removing the oil mist will be improved. Apart from the outlet, the discharge chamber for discharging oil mist converted into oil droplets is formed in the separation chamber, so mist-containing air leaks partially to the outside in the middle of the flow path of the separation chamber. This structure is one of the factors that lower the oil mist removal efficiency of the mist-containing air once sucked into the separation chamber in the separation chamber. In addition, if the oil adsorbent layer that guides the oil mist that has become oil droplets to the outlet or the spiral groove on the inner peripheral wall of the casing becomes clogged, the flow of the oil mist that has become oil droplets due to the wind pressure of the fan is obstructed. Therefore, depending on the use environment, it is considered that maintenance and inspection and cleaning work are troublesome.

Further, in the oil mist removing device disclosed in Japanese Patent Publication No. 55-38172, a certain amount of oil mist is attached to the wall of the rectifying chamber by rapidly expanding the mist-containing air in the rectifying chamber. At the same time, a collecting plate made of wire mesh, punched metal, or the like is attached to the discharge port on the separation chamber side of the rectifying chamber so that chips and the like do not enter the separation chamber. However, with such a structure, there is a problem that the efficiency of removing the oil mist in the flow straightening chamber is poor, and the work of cleaning the separation chamber must be frequently performed. In the present invention,
An object of the present invention is to provide an oil mist removal device that can improve the oil mist removal efficiency by solving these problems.

[0008]

In order to achieve the above object, according to the present invention, as a first invention, oil mist is removed by sucking mist-containing air from a rectifying chamber into a separation chamber by rotation of an electric fan unit. In the oil mist removal device that separates from the oil mist, a discharge port formed in the separation chamber for discharging oil mist that has been turned into oil droplets, and the rectifying chamber for sucking mist-containing air discharged from the discharge port. A perforated circulation port is provided, and a circulation channel connecting the discharge port and the circulation port is configured.

According to a second aspect of the present invention, there is provided an oil mist removing apparatus for separating oil mist from air by sucking mist-containing air from a rectifying chamber into a separating chamber by rotation of an electric fan unit, wherein the separating chamber comprises a cylindrical casing. A discharge port for discharging oil mist formed into oil droplets is formed in the cylindrical wall of the electric fan unit, and the separation port is formed at an edge of the discharge port in the rotation direction of the electric fan unit or in the vicinity of the edge. A collision plate is provided which protrudes radially inward from the inner peripheral wall surface of the chamber.

According to a third aspect of the present invention, there is provided the oil mist removing device according to the second aspect of the present invention, wherein the discharge port is provided in the separation chamber for discharging the oil mist formed into oil droplets, and the discharge port is provided through the discharge port. A circulating port formed in the rectifying chamber for sucking the mist-containing air to be supplied, and a circulating flow path connecting the discharging port and the circulating port is formed. As a fourth invention, in the oil mist removing devices of the first and third inventions, the motor, a centrifugal impeller mounted on a rotating shaft of the motor protruding into the separation chamber, and the centrifugal impeller and an axis line The electric fan unit comprises a fixed impeller which is disposed opposite to each other in the direction and is supported by the separation chamber, and a cylindrical wall portion of the cylindrical casing of the separation chamber which is radially outside the centrifugal impeller. The discharge port for discharging the oil mist formed into oil droplets is provided.

According to a fifth aspect of the present invention, in the oil mist removing device of the fourth aspect, the rectifying chamber and the accommodating chamber for the electric fan unit formed by partitioning the inside of the outer frame with a partition plate; The separation chamber, which is housed and fixed and has a suction port corresponding to the discharge port formed in the partition plate, and is formed in the separation chamber to discharge oil mist formed into oil droplets. The discharge port and the circulation port provided in the partition plate are provided, and the circulation flow path is formed by the outer frame and the partition plate. As a sixth invention, in the oil mist removing device of the fifth invention, the rectification chamber formed by the outer frame and the partition plate, and the rectification chamber is divided into a front chamber and a rear chamber. It is provided with a suction side filter accommodated in the room, and the circulation port provided in the partition plate, and the circulation passage and the rear chamber of the rectification chamber are communicated by the circulation port. And

According to a seventh aspect of the present invention, there is provided the oil mist removing device according to the sixth aspect of the invention, wherein the baffle plate is bent in a mountain shape and arranged so that the top is horizontal, and the baffle plate is similarly bent in a mountain shape. The suction side filter consisting of a collecting plate superposed at an interval on the baffle plate so that the outside of the top portion enters the inside of the top portion, and at least one sheet suspended from the upper side of the rectification chamber. The suction-side filter and at least one suction-side filter erected on the lower side of the rectification chamber are overlapped with an interval such that one top outside is inserted into the other top inside; Features.

According to an eighth aspect of the present invention, there is provided an oil in which mist-containing air is sucked from a rectifying chamber into a separation chamber by rotation of an electric fan unit to separate oil mist from the air, and a suction-side filter is formed in the rectifying chamber. In the mist removing device, a baffle plate bent in a mountain shape and arranged so that the top is in a horizontal state, and the baffle is similarly bent in a mountain shape so that the outside of the top of the baffle enters the inside of the top. The suction side filter comprising a collecting plate superposed at intervals on a plate, and at least one suction side filter suspended from the upper side of the rectification chamber and standing upright below the rectification chamber. And at least one suction-side filter is overlapped with an interval such that the outside of one top enters the inside of the other top. The features. As a ninth invention, in the oil mist removal device of the seventh and eighth inventions,
A plurality of the suction side filters are fixed in an outer edge frame, and a frame receiving portion for supporting the outer edge frame is provided in the rectification chamber, and the suction side filter is housed so as to be able to be taken in and out of the rectification chamber. It is characterized by.

[0014]

In the oil mist removing device, mist-containing air is sucked into the rectification chamber from the suction duct by rotation of the electric fan unit. The mist-containing air sucked into the rectifying chamber passes in a zigzag manner while colliding with the baffle plates between the multiple suction filters in the shape of a mountain. Is discharged to the outside. The mist-containing air sucked into the separation chamber is separated while passing in a zigzag manner between the rotor blade rows of the centrifugal impeller rotating in the separation chamber and the stationary blade rows of the fixed impeller fixed in the same separation chamber. Since the oil mist collides with the inner peripheral wall surface of the chamber, the oil mist is converted into oil droplets and discharged from the discharge port to the outside of the apparatus.

A small amount of mist-containing air is also discharged together with the oil mist formed into oil droplets. The mist-containing air is circulated from a circulation port formed in the partition plate to the rear chamber of the rectifying chamber. Since it is sucked into the separation chamber, it is separated again.

[0016]

1 and 2 show an embodiment of an oil mist removing device according to the present invention. FIG. 1 is a sectional view, and FIG. 2 is a sectional view taken along the line AA of FIG. The oil mist removing device shown in these drawings is for purifying air by sucking mist-containing air around the machine tool and separating the oil mist. Hereinafter, an embodiment of the present invention will be described in detail with reference to these drawings. The oil mist removing device 1 has a box-shaped pedestal member 3 serving as a lower outer frame to which a pair of legs 2 are welded.
An outer frame comprising a central outer frame 4 formed by bending a steel plate into a square shape, and a front outer frame 5 and a rear outer frame 6 welded to the front and rear openings of the central outer frame 4 is installed. The inside of these outer frames is partitioned by a partition plate 7, the front outer frame 5 side is a rectifying chamber 8, and the rear outer frame 6 side is a storage room 10 for an electric fan unit 9. The electric fan unit 9
A motor 11 mounted on the pedestal member 3 and having a rear part protruding from the storage chamber 10, and a rotating shaft 13 protruding from a cylindrical separation chamber 12 fixed to the motor 11 and the partition plate 7.
And a centrifugal impeller 14 mounted on the rotating shaft 13 at an axial interval, and a fixed impeller 1 interposed between the centrifugal impellers 14 at an interval and fixedly supported in the separation chamber 12.
5 is provided.

The centrifugal impeller 14 has a disk-shaped rear plate 17 screwed and fixed to a hub 16 integrally mounted on the rotating shaft 13, and moving parts regularly arranged at intervals in the circumferential direction. A disk-shaped front plate 19 is integrally fixed to the rear plate 17 via the cascade 18, and the fixed impeller 15 is
A disk-shaped rear plate 20 fixedly supported in the separation chamber 12 and having a center hole having a radius substantially the same as the inner diameter of the front plate 19 of the centrifugal impeller 14 is provided with a gap in the circumferential direction. And a disk-shaped front plate 22 integrally fixed to the rear plate 20 via stationary vane rows 21 arranged regularly. The front plate 22 of the fixed impeller 15 has substantially the same outer diameter as the outer diameter of the front plate 19 and the rear plate 17 of the centrifugal impeller 14, and the inner diameter of the front plate 22 is
It is slightly larger than the shaft diameter of the rotating shaft 13.

The separation chamber 12 containing the impellers 14 and 15 includes a cylindrical rear casing 23 with a flange screwed to the front of the motor 11 and a rear casing 2.
A central central casing 24 having a flange fixed to the flange 3 via a rear plate 20 of the fixed impeller 15, and a rear plate 20 of the fixed impeller 15 mounted to a flange on the front side of the central casing 24. A rear casing 23 is defined by a front casing 25 having a flange fixed thereto, and a rear casing 23 is formed with a cylindrical discharge cylinder part 23a and a lowermost oil mist discharge port 23b formed as an oil droplet. In the central casing 24,
The outlet 24a of the oil mist that has been turned into oil droplets at the bottom is
Further, the front casing 25 is formed with a suction port 25a having a shape corresponding to the discharge port 7a of the partition plate 7 and a discharge port 25b of oil mist formed into oil droplets at the lowermost portion.
The above-described outlets 23b, 24a, and 25b correspond to the centrifugal impeller 1 of the cylindrical casings 23, 24, and 25.
4 is formed in a cylindrical wall portion on the outside in the radial direction, and among the outlets 23b, 24a, and 25b, the outlet 24a is formed.
25b has a collision plate 26 bent in a substantially rectangular shape
・ 27 is fixed. These collision plates 26 and 27
The rotation direction B of the electric motor 11 among the discharge ports 24a and 25b
Is fitted and fixed to the wall surface side of the.

A pair of suction-side filters 28 are housed in the rectifying chamber 8 which communicates with the separation chamber 12 at the suction port 25a and the discharge port 7a, and the front chamber 8 on the suction port 5a side.
a and a rear chamber 8b on the discharge port 7a side. The front chamber 8a and the rear chamber 8b communicate with each other through a bent flow path between a pair of suction-side filters 28 (28a, 28b). ing. Each suction-side filter 28 is bent into a mountain shape and arranged so that the top is in a horizontal state, and similarly, is bent into a mountain shape so that the outside of the top of the baffle 29 enters the inside of the top. And a collecting plate 30 made of a metal mesh, a punched metal, or the like, which is superposed on the baffle plate 29 at an interval. A suction-side filter 28a, and an upright rear suction-side filter 28 fixed to the lower side and left and right of the outer edge frame 31;
b. The outer edge frame 31 is inserted through a through hole formed in the center outer frame 4, and the lower portions thereof are fitted and supported by upper and lower frame receivers 32 a and 32 b installed on the pedestal member 3. By screwing the cover plate 34 to the central outer frame 4 via a sealing member 33 pressed on the upper part of the frame, the outer edge frame 31 is housed in the rectifying chamber 8 so as to be freely taken in and out. A discharge port 35 communicating with a lower portion of the outer edge frame 31 and the frame receiving tables 32a and 32b is individually formed, and an oil mist which is discharged from the discharge port 35 and converted into oil droplets is supplied to the lower frame receiving section. The oil is discharged to the outside through an oil outlet (not shown) formed in the base 32b through an oil discharge pipe 36 fixed to the base member 3.

The oil mist separated into oil droplets in the separation chamber 12 is discharged from the discharge ports 23b, 24a, and 25b to the pedestal member 3 from an oil flow port (not shown) formed in the partition plate 7 through an unillustrated oil flow port. The oil is discharged outside through the fixed oil discharge pipe 36. The through-hole indicated by reference numeral 7b is a circulation port, which is formed at a position slightly higher than the bottom plate of the pedestal member 3. However, since the circulation port 7b also serves as the above-described oil flow port (not shown). Alternatively, a notch groove or the like opened on the bottom plate side of the pedestal member 3 may be used. Reference numeral 37 denotes a discharge-side filter tube member installed on the discharge cylinder 23a of the rear casing 23 that defines the separation chamber 12, and reference numeral 38 denotes a discharge-side filter tube member.
Is fixed to the front outer frame 5 and has a suction port 5a of the front outer frame 5.
A cylindrical tube having a suction port 38a having a shape corresponding to
A suction duct (not shown) is fitted and mounted.

In the oil mist removing apparatus 1 of this embodiment having the above-described structure, the flow path of the mist-containing air from the suction port 38a of the cylindrical pipe 38 to the discharge-side filter pipe member 37 is formed in the rectification chamber 8. From the pair of suction side filters 28, through the suction port 25a of the separation chamber 12, through the centrifugal impeller 14 and the fixed impeller 15 in the separation chamber 12, and from the discharge cylinder 23a to the discharge side filter pipe member 37. Becomes Therefore, the mist-containing air sucked from the suction port 38 a by the rotation of the electric fan unit 9 expands the mist-containing air in the rectification chamber 8 having a flow path cross-sectional area much larger than the flow path cross-sectional area of the cylindrical tube 38. Liquefaction, collision with the suction-side filter 28, and passing in a staggered manner between the suction-side filters 28, a part of the oil mist is turned into oil droplets, and is discharged from the discharge port 35 through the oil discharge pipe 36 to the outside. Is discharged. Note that chips and the like sucked together with the mist-containing air are collected by the collecting plate 30 of the suction-side filter 28.

The mist-containing air having passed through the rectifying chamber 8 is supplied to the discharge port 7 a of the partition plate 7 defining the rectifying chamber 8 and the separation chamber 12.
Is sucked into the separation chamber 12 through the suction port 25a of the front casing 25 which defines Then, after the flow surface of the mist-containing air radially spreads through the flow path between the rotor blade rows 18 of the centrifugal impeller 14 and is orthogonal to the rotating shaft 13 of the electric motor 11 and collides with the inner peripheral wall surface of the front casing 25, Since the flow surface is narrowed through the flow path between the stationary blade rows 21 of the fixed impeller 15, the oil mist of the mist-containing air passing through the centrifugal impeller 14 and the fixed impeller 15 in a staggered manner is generated by centrifugal force. It collides against the inner peripheral wall surfaces of the casings 23, 24 and 25 and is separated. Also, the outlets 24a, 25 of the casings 24, 25
b, the collision plates 26 and 27 are fixed to the wall surface in the rotation direction of the electric motor 11, respectively.
The mist-containing air on the inner peripheral wall side of the impeller 25 collides with the impingement plates 26 and 27 by the wind pressure of the centrifugal impeller 14. Therefore,
The mist-containing air passing through the inside of the separation chamber 12 is
The oil mist is turned into oil droplets because it collides with the inner peripheral wall surfaces of 3.24.25 and the collision plates 26 and 27, and each of the discharge ports 23b
-The oil is discharged to the outside from the oil discharge pipe 36 through 24a and 25b. The mist-containing air having a small mist content is discharged from the discharge tube portion 23a to the discharge-side filter tube member 3.
7, the purified air can be exhausted.

Further, in the oil mist removing device 1 of this embodiment, the collision plates 26 and 27 are fixed to the casings 24 and 25 that define the separation chamber 12, and a part of the mist-containing air in the separation chamber 12 is removed. Although it is structured to be discharged into the storage room 10 of the electric fan unit 9, a circulation port 7 b communicating the storage room 10 and the rear room 8 b of the rectification room 8 forms a partition plate 7 defining the rectification room 8. Because it is perforated, storage room 10
The mist-containing air inside is circulated from the circulation port 7b to the suction port 25a of the separation chamber 12 and separated again. Therefore, the mist-containing air is not discharged outside the apparatus. In the above description, the casings 23, 24, and 25 that define the separation chamber 12 are
The circulation channels are formed by the outer frames 4 and 6 that define the storage chamber 10 and the partition plate 7, but the casing 2 that defines the electric fan unit 9 and the separation chamber 12 on the base member 3.
When installing in a state where 3.24.25 is exposed to the outside, a circulation duct that connects each of the outlets 23b, 24a, and 25b to the circulation port 7b may be configured.

In this embodiment, the suction side filter 28
To one suction-side filter 28 suspended in the rectification chamber 8.
a and one suction-side filter 28 erected in the rectification chamber 8.
However, a plurality of suction side filters 28a and 28b may be prepared and alternately stacked at intervals. Further, the collision plates 26 and 27 formed in the separation chamber 12 may be formed integrally by cutting and raising a part of each of the casings 24 and 25 inward in the radial direction.
Then, the cut and raised portions may be used as the outlets 24a and 25b.

[0025]

As described above, according to the present invention, as a first invention, a discharge port formed in a separation chamber for discharging oil mist formed into oil droplets, and a discharge port is discharged from the discharge port. A circulating port is provided in the rectification chamber to suck in mist-containing air, and a circulating channel connecting the discharge port and the circulating port is configured. The mist-containing air on the wall side is not discharged to the outside together with the oil mist that has turned into oil droplets in this separation chamber, and the efficiency of removing the mist-containing air once sucked into the separation chamber in the separation chamber is improved. The air cleaning becomes good.

According to a second aspect of the present invention, a discharge port for discharging oil mist converted into oil droplets is formed in a cylindrical wall of a separation chamber formed of a cylindrical casing. An impact plate is provided protruding radially inward from the inner peripheral wall of the separation chamber at or near the edge in the rotation direction of the separation chamber, so that the separation chamber having a relatively large mist content due to centrifugal separation action The mist-containing air on the side of the peripheral wall collides with the collision plate by the wind pressure of the fan to promote the formation of oil mist into oil droplets and improve the discharge rate of the oil mist formed into oil droplets. Therefore, the oil mist removal efficiency is improved, and the air cleaning is improved.

Further, as a third invention, in the oil mist removing device of the second invention, as in the first invention, a discharge port formed in the separation chamber for discharging oil mist formed into oil droplets, By providing a circulation port formed in the rectification chamber for sucking the mist-containing air discharged from the discharge port, and forming a circulation flow path connecting the discharge port and the circulation port, the centrifugal separation allows relatively The mist-containing air on the peripheral wall side of the separation chamber, which has a large amount of mist, is not discharged to the outside together with the oil mist that has turned into oil droplets in the separation chamber. Mist removal efficiency is improved, and air cleaning is improved.

According to a fourth aspect of the present invention, there is provided the oil mist removing device according to the first or third aspect, wherein the motor, a centrifugal impeller mounted on a rotating shaft of the motor protruding into the separation chamber, and the centrifugal impeller The electric fan unit, which comprises a vehicle and a fixed impeller that is disposed in the axial direction to face each other and is supported by the separation chamber, and a cylindrical casing of the separation chamber that is radially outward of the centrifugal impeller. Since the discharge port for discharging the oil mist converted into oil droplets is formed in the wall portion, the discharge port for the oil mist on the peripheral wall surface of the separation chamber that has been formed by the collision due to the centrifugal action of the centrifugal impeller is formed. The mist air on the peripheral wall side of the separation chamber, which has good fluidity to the side and has a relatively high mist content, is collided with the impingement plate by the wind pressure of the centrifugal impeller, thereby promoting the formation of oil mist into oil droplets. And Discharge rate of the oil droplets of the the oil mist can be improved. Therefore, the oil mist removal efficiency is improved, and the air cleaning is improved.

According to a fifth aspect of the present invention, in the oil mist removing device according to the fourth aspect of the present invention, a rectifying chamber formed by partitioning the inside of the outer frame by a partition plate, a housing chamber for the electric fan unit, and a housing provided in the housing chamber. A separation chamber, which is fixed and has a suction port corresponding to the discharge port formed in the partition plate, and a discharge port formed in the separation chamber for discharging oil mist formed into oil droplets; A circulation port formed in the plate is provided, and the circulation channel is formed by the outer frame and the partition plate, so that the circulation channel from the discharge port of the separation chamber to the circulation port of the partition plate and the circulation port to the separation chamber are formed. The flow path to the suction port can be configured with the shortest distance, and the efficiency of sucking the mist-containing air discharged from the separation chamber together with the oil mist converted into oil droplets into the separation chamber again by the electric fan unit is improved. In the separation room Oil mist removal efficiency of the separation chamber of the filled-in containing mist air is more enhanced clean air is improved.

According to a sixth aspect of the present invention, there is provided the oil mist removing apparatus according to the fifth aspect of the present invention, wherein the rectifying chamber is formed by an outer frame and a partition plate, and the rectifying chamber is divided into a front chamber and a rear chamber. An oil mist that has been turned into oil droplets because it has a suction-side filter housed in the room and a circulation port formed in the partition plate, and the circulation path communicates with the rear chamber of the rectification chamber through the circulation port. As a result, the mist-containing air discharged from the separation chamber and the mist-containing air cleaned by the suction side filter are mixed, so that the mist content of the mist-containing air discharged from the separation chamber increases. In addition, the efficiency of removing oil mist in the separation chamber of the mist-containing air once sucked into the separation chamber is improved, and the air cleaning is improved.

According to a seventh aspect of the present invention, there is provided the oil mist removing device according to the sixth aspect of the present invention, wherein the baffle plate is bent in a mountain shape and the top is arranged horizontally so that the baffle plate is similarly bent in a mountain shape. A suction-side filter comprising a collecting plate superposed at an interval on a baffle plate so that the outside of the top enters the inside of the top, and at least one suction-side filter suspended from above the rectifying chamber; Since at least one suction-side filter erected on the lower side of the rectification chamber is overlapped with an interval such that the outside of one top enters the inside of the other top,
Chips and the like sucked together with the mist-containing air from the suction duct are collected by the collecting plate, and the mist-containing air passes between the suction-side filters in a zigzag manner while colliding with the collision plate. Drip formation is promoted and oil mist removal efficiency can be improved.

Further, as an eighth invention, in the oil mist removing device in which the suction side filter is formed in the rectifying chamber, similarly to the baffle plate which is bent in a mountain shape and arranged so that the top is horizontal. The suction-side filter was composed of a collecting plate that was bent into a mountain shape and was overlapped with a baffle plate at an interval so that the outside of the top of the baffle plate entered the inside of the top portion, and was hung from the upper side of the rectification chamber. A structure in which at least one suction-side filter and at least one suction-side filter erected below the rectifying chamber are overlapped with an interval such that one top outside enters the other top inside. As a result, chips and the like sucked together with the mist-containing air from the suction duct are collected by the collection plate, and the mist-containing air collides between the suction side filters and the collision plate. Having traversed in a zigzag pattern while, it is possible to improve the oil mist removing efficiency with oil droplets of the oil mist is forcing. In addition, dirt in the separation chamber can be suppressed, and the maintenance and inspection and cleaning work in the separation chamber can be omitted.

According to a ninth invention, in the oil mist removing device of the seventh or eighth invention, a plurality of suction-side filters are fixed in the outer edge frame, and a frame receiver for supporting the outer edge frame in the rectification chamber. Since the suction-side filter is provided so that the suction-side filter can be freely taken in and out of the rectification chamber, the work of cleaning the suction-side filter is simplified.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an embodiment of an oil mist removing device of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG. 1 with a part omitted.

[Explanation of symbols]

 Reference Signs List 7 Partition plate 7b Circulating port 8 Rectifying chamber 9 Electric fan unit 12 Separation chamber 23b Discharge port 24a Discharge port 25b Discharge port 26 Collision plate 27 Collision plate 28 Suction side filter 37 Discharge side filter

Claims (9)

(57) [Claims] In an oil mist removing apparatus for separating oil mist from air by sucking mist-containing air from a rectifying chamber into a separation chamber by rotation of an electric fan unit, the oil mist is removed in order to discharge oil mist formed into oil droplets. A discharge port provided in the separation chamber, and a circulation port provided in the flow straightening chamber for sucking mist-containing air discharged from the discharge port, and a circulation connecting the discharge port and the circulation port. An oil mist removing device comprising a flow path. 2. An oil mist removing device for separating oil mist from air by sucking mist-containing air from a rectifying chamber into a separating chamber by rotation of an electric fan unit, wherein a cylindrical wall portion of the separating chamber comprises a cylindrical casing. A discharge port for discharging the oil mist that has been turned into oil droplets is formed at an edge of the discharge port in the rotation direction of the electric fan unit or in the vicinity of the edge. An oil mist removing device comprising an impact plate protruding radially inward from a wall surface. 3. The discharge port formed in the separation chamber for discharging oil mist formed into oil droplets, and the discharge port formed in the rectification chamber for sucking air containing mist discharged from the discharge port. 3. The oil mist removing device according to claim 2, wherein a circulation port is provided, and a circulation channel connecting the discharge port and the circulation port is formed. 4. An electric motor, a centrifugal impeller mounted on a rotating shaft of the electric motor protruding into the separation chamber, and fixed vanes disposed axially opposed to the centrifugal impeller and supported by the separation chamber. The electric fan unit comprising a car and the cylindrical casing of the separation chamber, the cylindrical wall portion of the centrifugal impeller being radially outward of the centrifugal impeller, for discharging oil mist formed into oil droplets. The oil mist removing device according to claim 1 or 3, wherein a discharge port is provided. 5. A rectifying chamber formed by partitioning the inside of an outer frame by a partition plate, a housing room for the electric fan unit, and a housing housed and fixed in the housing room and formed in the partition plate. The separation chamber in which a suction port corresponding to a discharge port is formed, the discharge port formed in the separation chamber for discharging oil mist converted into oil droplets, and the separation hole formed in the partition plate. The oil mist removing device according to claim 4, further comprising a circulation port, wherein the circulation flow path is formed by the outer frame and the partition plate. 6. A rectification chamber formed by the outer frame and the partition plate, a suction-side filter housed in the rectification chamber so as to divide the rectification chamber into a front chamber and a rear chamber. The oil mist removal device according to claim 5, further comprising the circulation port provided in the partition plate, wherein the circulation channel and the rear chamber of the rectifying chamber are connected by the circulation port. . 7. A baffle plate which is bent into a mountain shape and is arranged so that the top is in a horizontal state, and said baffle is also bent into a mountain shape so that the outside of the top of the baffle enters the inside of the top. The suction side filter comprising a collecting plate superposed at intervals on a plate, and at least one suction side filter suspended from the upper side of the rectification chamber and standing upright below the rectification chamber. At least one
7. The oil mist removing device according to claim 6, wherein a plurality of the suction side filters are overlapped with an interval such that the outside of one top enters the inside of the other top. 8. An oil mist removing device, wherein an mist-containing air is sucked from a rectification chamber into a separation chamber by rotation of an electric fan unit to separate oil mist from air and a suction-side filter is provided in the rectification chamber.
A baffle plate that is bent into a mountain shape and arranged so that the top is in a horizontal state, and a space between the baffle plate that is similarly bent into a mountain shape so that the outside of the top of the baffle enters the inside of the top. And the at least one suction-side filter suspended from the upper side of the rectification chamber and at least one of the suction-side filters erected below the rectification chamber. An oil mist removing device, wherein the suction-side filter is overlapped with an interval such that the outside of one top enters the inside of the other top. 9. A plurality of suction side filters are fixed in an outer edge frame, and a frame receiving portion for supporting the outer edge frame is provided in the rectification chamber, and the suction side filter is put in and out of the rectification chamber. The oil mist removal device according to claim 7 or 8, wherein the oil mist removal device is freely housed.