JP2012055839A - Apparatus for removing oil mist - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus for removing oil mist which can improve the cleaning effect of a mesh, and can endure a long-term operation.SOLUTION: The apparatus for removing oil mist is provided with: an inner cylinder 13 that encircles the circumference of an electric motor 12; an outer cylinder 14 that encircles the circumference of the inner cylinder 13; a suction fan 15 that is fixed to an output shaft 11 of the electric motor 12 and guides an air flow from a center side to a circumferential side; an air intake 16 that communicates the outside and the inside of the outer cylinder 14; a cyclone part 18 that separates the air flow taken from the air intake 16 by a negative pressure generated along with the rotation of suction fan 15; a rotary disk 19 disposed between the electric motor 12 and the suction fan 15; a plurality of meshes 20 that are provided near the circumference of the rotary disk 19 and causes the collision action to air flows vertically circulating when rotating; and a lower spray washer 52 that jets a washing liquid from the lower side of the rotary disk aiming at the meshes 20.

Description

  The present invention relates to an oil mist removing apparatus capable of collecting and removing oil mist from a dust-containing air flow such as oil smoke generated inside a machine tool.

  2. Description of the Related Art Conventionally, an oil mist removing device that can collect and remove oil mist from a dust-containing airflow (oil smoke) containing oil mist generated inside a machine tool is known. Further, in such an oil mist removing device, for example, as in Patent Document 1, oil mist is removed by a mesh provided on a cyclone portion and a rotating disk that rotates at high speed without using a filter. The technology to collect is known. Further, a cleaning port is provided above the mesh, and even when an oil mist adhering component or dust component adheres to the mesh, cleaning is performed with a cleaning liquid or cleaning air introduced from the cleaning port.

JP 2010-158634 A

  However, when sucking an air stream containing high-concentration oil mist or when sucking a dust-containing air stream containing a lot of dust or dust in addition to oil mist, high-concentration oil mist or fixed components A lot of dust components adhere and must be washed frequently.

  However, as described above, in the configuration in which the cleaning liquid is introduced and cleaned from the cleaning port disposed above the mesh, for example, when the mesh is cleaned while the oil mist removing device is operating, the flow of air flows. There is a possibility that splashes of the fixing component and the dust component leak together with the cleaning water from the exhaust port and are scattered around.

  For this reason, when performing the cleaning process, the operation of the oil mist removing device must be temporarily stopped (the fan is stopped), and in the case of continuous operation for a long time according to the operating status of the machine tool, There was a problem that the cleaning process could not be performed and the oil mist recovery efficiency was reduced. Moreover, during the cleaning time of the oil mist removing device, the operation of the machine tool has to be stopped, and there is a problem that the operation rate of the machine tool is lowered. In addition, when the operation of the oil mist removing device is stopped (fan is stopped) and the cleaning process is performed, the rotating disk does not rotate, so that only a part of the mesh can be cleaned. Also occurred. Furthermore, since the oil mist contained in the airflow is sucked from the lower side of the mesh, a large amount of adhering components and dust components adhere to the lower surface of the mesh. There was also a problem that it was difficult to remove all adhering adhering components and dust components.

  Therefore, in consideration of the above circumstances, the present invention makes it possible to clean the adhering component and dust component adhering to the mesh even when the oil mist removing device is in operation, and in particular, to fix the adhering component and dust component adhering to the lower side of the mesh. It aims at providing the mist removal apparatus which can be removed and can endure long-term operation.

  An oil mist removing device according to the present invention includes an electric motor having an axis in a substantially vertical direction, a substantially cylindrical inner cylinder that coaxially surrounds the outer periphery of the electric motor, and an outer periphery of the inner cylinder. A substantially cylindrical outer cylinder that coaxially surrounds at a predetermined interval, a suction fan that is fixed to the output shaft of the electric motor and guides airflow from the center side to the outer periphery side, and an outer side of the outer cylinder A suction port provided on the wall surface that communicates between the outside and the inside of the outer cylinder, and a lower portion of the suction fan so as to separate an airflow sucked from the suction port by a negative pressure generated as the suction fan rotates. , A rotating disk that is arranged between the electric motor and the suction fan and rotates coaxially with the output shaft, and a plurality of rotating disks that are provided near the outer periphery of the rotating disk and that circulate vertically Impact on rotating airflow And to mesh, characterized in that the lower spray scrubber, a provided for injecting the washing liquid from below the rotary disk toward the rotating disk and the mesh.

  According to the oil mist removing apparatus of the present invention, when sucking a dust-containing airflow containing high-concentration oil mist, or when sucking a dust-containing airflow containing dust or dust in addition to the oil mist, The fixing component and the dust component adhering to the mesh can be cleaned, and particularly the fixing component and the dust component adhering to the lower surface of the mesh can be efficiently removed to withstand long-term operation. In addition, the mesh cleaning process can be performed even while the suction fan is in operation, and there is no time restriction on the cleaning process, and there is no need to stop the machine at the installation site. Can contribute to efficiency improvement.

  The oil mist removing apparatus according to claim 2 is characterized in that the lower spray cleaner performs an intermittent and repeated cleaning operation in a state where the electric motor is driven.

  According to the configuration of the second aspect, since the cleaning operation is repeatedly performed intermittently, the sticking component and the dust component adhering to the mesh and the rotating disk can be prevented from sticking, and the cleaning liquid can be efficiently cleaned while saving the cleaning liquid. Processing can be performed.

  The oil mist removing apparatus according to claim 3, wherein the lower spray cleaner is provided in the cyclone unit at a position immediately before a swirling airflow that continues from the intake port to the cyclone unit reaches the intake port again. It is characterized by that.

  According to the configuration of claim 3, even if relatively large dust is mixed in the dust-containing air, the relatively large dust or the like is upstream of the cyclone portion upstream of the lower spray cleaner. Therefore, the mesh cleaning is hardly hindered by the relatively large dust, and the mesh cleaning effect can be improved.

  The oil mist removing apparatus according to a fourth aspect is characterized in that the lower spray cleaner includes a lower spray nozzle that injects cleaning water across the entire radial width of the mesh.

  According to the configuration of the fourth aspect, the rotating disk and the mesh can be washed evenly with a small cleaning liquid flow rate.

  An oil mist removing device according to claim 5 is an electric motor having an axis in a substantially vertical direction, a substantially cylindrical inner cylinder that coaxially surrounds the outer periphery of the electric motor at a predetermined interval, A substantially cylindrical outer cylinder that coaxially surrounds the outer periphery of the cylinder with a predetermined interval; a suction fan that is fixed to the output shaft of the electric motor and guides the airflow from the center side to the outer periphery side; The suction port provided on the outer wall surface of the cylinder and communicating between the outside and the inside of the outer cylinder, and the suction air so as to separate the airflow sucked from the suction port by the negative pressure generated by the rotation of the suction fan A cyclone portion formed below the fan, a rotating disk disposed between the electric motor and the suction fan and rotating coaxially with the output shaft, and a plurality of rotating disks provided near the outer periphery of the rotating disk. Collisions when rotating against the airflow flowing up and down And an upper spray cleaner for injecting cleaning liquid from above the rotating disk toward the rotating disk and the mesh, and the cleaning liquid sprayed from the upper spray cleaner is the rotating It is characterized by being ejected with an inclination with respect to the direction perpendicular to the disk.

  According to the configuration of claim 5, by spraying the cleaning liquid onto the rotating disk and mesh from above by the upper spray cleaner, the fixed component and the dust component that are difficult to drop by the lower spray cleaner from below, In particular, the sticking component and dust component adhering to the upper surface of the rotating disk and mesh can be washed. Furthermore, since the spray port of the upper spray cleaner is tilted with respect to the direction perpendicular to the rotating disk, the cleaning liquid is sprayed obliquely onto the mesh, and the rotating disk rotates due to the injection pressure, so the entire circumference of the mesh is cleaned. can do.

  An oil mist removing apparatus according to claim 6 is an electric motor having an axis in a substantially vertical direction, a substantially cylindrical inner cylinder that coaxially surrounds the outer periphery of the electric motor at a predetermined interval, A substantially cylindrical outer cylinder that coaxially surrounds the outer periphery of the cylinder with a predetermined interval; a suction fan that is fixed to the output shaft of the electric motor and guides the airflow from the center side to the outer periphery side; The suction port provided on the outer wall surface of the cylinder and communicating between the outside and the inside of the outer cylinder, and the suction air so as to separate the airflow sucked from the suction port by the negative pressure generated by the rotation of the suction fan A cyclone portion formed below the fan, a rotating disk disposed between the electric motor and the suction fan and rotating coaxially with the output shaft, and a plurality of rotating disks provided near the outer periphery of the rotating disk. Collisions when rotating against the airflow flowing up and down A mesh that exerts an application; a lower spray cleaner that sprays a cleaning liquid from below the rotating disk toward the rotating disk and the mesh; and an upper part of the rotating disk toward the rotating disk and the mesh. And an upper spray cleaner for injecting the cleaning liquid.

  According to the configuration of claim 6, the mesh can be cleaned with the cleaning liquid even during the fan operation by the lower spray cleaner, and there is no restriction on the cleaning time, so there is no need to stop the machine tool, There is no hindrance to operation. In addition, by spraying the cleaning liquid onto the rotating disk and mesh from above with the upper spray cleaner, it is difficult to drop off by the lower spray cleaner from below, especially on the upper surface of the rotating disk and mesh. The adhering fixing component and dust component can be washed. Therefore, the mutual cleaning action of the lower spray cleaner and the upper spray cleaner can reliably remove the sticking component and dust component adhering to the mesh of the rotating disk, and can withstand long-term operation. it can.

  The oil mist removing apparatus according to claim 7, wherein the lower spray cleaner sprays cleaning liquid intermittently while the electric motor is driven, and the upper spray cleaner The cleaning liquid is ejected after the driving is stopped.

  According to the structure described in claim 7, during operation (during mist suction), cleaning is performed intermittently by spraying the cleaning liquid from the lower spray cleaner, so that the mesh (rotating disc) is fixed. Ingredients and dust components do not accumulate. Furthermore, after stopping the rotating disk, cleaning is performed by spraying the cleaning liquid from the upper spray cleaner, and the fixed components and dust components that could not be removed by the lower spray cleaner are dropped, so the mesh (rotating disk) is always It is an oil mist removing device that is in a clean state where no sticking component or dust component adheres and can be maintained fully automatically.

  The oil mist removing apparatus according to claim 8 is characterized in that the cleaning liquid sprayed from the upper spray cleaner is sprayed with an inclination with respect to a direction perpendicular to the rotating disk.

  According to the configuration described in claim 8, since the injection port of the upper spray cleaner is inclined with respect to the direction perpendicular to the rotating disk, the cleaning liquid is injected obliquely onto the mesh, and the rotating disk is caused by the injection pressure. Since it rotates, the entire circumference of the rotating disk can be washed. Therefore, since it is not necessary to operate the suction fan, it is possible to prevent the spray of the cleaning liquid, the fixed component, and the dust component from being scattered outside the oil mist device.

  The oil mist removing apparatus according to claim 9, wherein the cleaning liquid sprayed from the upper spray cleaner is inclined so as to be sprayed in a counter direction with respect to a rotation direction of the rotating disk driven by the electric motor. It is characterized by.

  According to the structure of Claim 9, at the time of washing | cleaning by injection of an upper spray washing device, a rotation disc rotates in the reverse direction to the time of fan operation, and the fan also rotates in the reverse direction (counter direction) to the time of operation. Therefore, the suction force of the fan does not act, and the spray of the cleaning liquid, the fixed component, and the dust component does not leak from the exhaust port of the oil mist device.

  The present invention can improve the cleaning effect of the mesh and can withstand long-term operation.

It is a front view of the oil mist removal apparatus which concerns on this invention. It is a top view of the oil mist removal apparatus which concerns on this invention. FIG. 3 is a longitudinal sectional view showing the oil mist removing apparatus of the present invention and taken along line AA in FIG. 2. FIG. 4 is a plan sectional view showing the oil mist removing device of the present invention and taken along line BB in FIG. 3. FIG. 4 is a plan sectional view showing the oil mist removing apparatus of the present invention and taken along line CC in FIG. 3. It is an enlarged side view of the upper side spray washing device seen from the arrow D of FIG. 5 applied to the oil mist removal apparatus of this invention. It is a timing chart which shows the example of a cleaning timing in the oil mist removal apparatus of this invention. It is a disassembled perspective view of the principal part of the oil mist removal apparatus of this invention.

  Next, the oil mist removing apparatus of the present invention will be described with reference to the drawings.

  The following embodiments are preferred specific examples of the present invention and may have various technically preferable limitations. However, the technical scope of the present invention is not limited to the description of the present invention. As long as it is not limited to these embodiments.

  FIG. 1 is a front view of an oil mist removing apparatus according to the present invention, FIG. 2 is a plan view of the oil mist removing apparatus according to the present invention, and FIG. 3 shows the oil mist removing apparatus of the present invention. 4 shows the oil mist removing apparatus of the present invention, FIG. 5 is a plane sectional view taken along the line BB of FIG. 3, FIG. 5 shows the oil mist removing apparatus of the present invention, and FIG. FIG. 6 is an enlarged side view of the upper spray cleaner as viewed from the direction of arrow D in FIG. 5 applied to the oil mist removing apparatus of the present invention, and FIG. 7 is an oil mist removing apparatus of the present invention. FIG. 8 is an exploded perspective view of the main part of the oil mist removing apparatus of the present invention.

  1 to 5, an oil mist removing apparatus 10 includes an electric motor 12 in which an axis of an output shaft 11 (hereinafter referred to as an axis reference) extends in a substantially vertical direction, and an outer periphery of the electric motor 12 at a predetermined interval. A substantially cylindrical inner cylinder 13 that is coaxially surrounded, a substantially cylindrical outer cylinder 14 that is coaxially surrounded by the output shaft 11 around the outer periphery of the inner cylinder 13 at a predetermined interval, and is fixed to the output shaft 11. And a suction fan 15 that guides the airflow from the center side to the outer peripheral side, and an intake port 16 that protrudes in a tangential direction intersecting the axis from the outer wall surface of the outer cylinder 14 and communicates the outside and the inside of the outer cylinder 14. A cyclone portion 18 is formed below the suction fan 15 for separating the airflow sucked from the intake port 16 by the negative pressure generated as the suction fan 15 rotates.

  Further, the oil mist removing device 10 is disposed between the cyclone portion 18 and the suction fan 15, and a rotating disk 19 that rotates coaxially with the output shaft 11. A plurality of oil mist removing apparatuses 10 are provided near the outer periphery of the rotating disk 19. The mesh 20 that has a collision effect when rotating on the airflow flowing through the airflow, and the airflow that is arranged between the rotating disk 19 and the suction fan 15 and swirls in the same direction as the rotating direction of the rotating disk 19 is centered. And a fixed blade body 22 having a plurality of guide blades 21 curved in the guiding direction.

  The dust-containing airflow including the oil mist sucked from the intake port 16 by the suction action accompanying the rotation of the suction fan 15 is relatively large dust such as chips contained in the dust-containing airflow by the centrifugal action of the cyclone unit 18 as a swirling airflow. Isolate. At the same time, an oil mist that rises while turning by the mesh 20 of the rotating disk 19 that rotates in the direction opposite to the turning direction of the swirling airflow is blown to the outer periphery while colliding with the oil mist and the like, and is provided below the outer cylinder 14. The waste oil outlet 23 is configured to waste oil. The oil mist and the like here mainly include oil mist itself, dust, dust that cannot be separated by the cyclone unit 18 (fine polishing powder and cutting powder), and dust containing oil mist in the swirling airflow. And a dust component mainly composed of dust attached with oil mist.

  Hereinafter, a specific configuration of the oil mist removing apparatus 10 according to the present invention will be described.

  The lower end of the electric motor 12 is supported by the bracket 26 via a plurality of vibration damping dampers 25 fixed to the pedestal 24. Further, the electric motor 12 is supplied with power from a control circuit unit 27 fixed to the outer wall surface of the outer cylinder 14 and its rotational speed is controlled. The bracket 26 supports the bottom plate 28.

  The lower end of the inner cylinder 13 is supported by the bottom plate 28. The inner cylinder 13 may be supported by a bracket 26. Further, the inner cylinder 13 fixes a rectifying plate 31 having a plurality of rectifying blades 29 and rectifying openings 30 that define the airflow direction (swirl direction) in the cyclone portion 18 of the airflow sucked from the intake port 16. Yes. A plurality of rectifying openings 30 are formed below the rectifying blades 29. At this time, the rectifying openings 30 can be simultaneously formed by cutting and raising the rectifying blades 29.

  When the rectifying plate 31 is not provided with the rectifying blades 29 and only a small-diameter opening (not shown) is formed by punching metal or the like, it is difficult to regulate the direction of the airflow by the rectifying blades 29, but many small diameters are provided. The airflow rising by the opening can be dispersed to exert a rectifying effect, and the effect of equalizing the ratio of collision with the rotating disk 19 on the circumference can be achieved. The small-diameter opening also serves as a guard that prevents the rotating disk 19 from being touched when a foreign matter removing effect is made possible by providing an opening / closing lid or the like in a part of the outer cylinder 14, for example. be able to. At this time, it is most effective to employ both the rectifying blades 29 and the small-diameter opening, but even if the mounting is performed using only the small-diameter opening for reducing the cost, the effect of the present invention can be sufficiently exhibited. Can do.

  The outer cylinder 14 is fixed to the bottom plate 28 and integrally forms the intake pipe 17 and the waste oil port 23. At this time, the intake pipe 17 and the waste oil port 23 may be separate. The waste oil port 23 is partially flush with the top surface of the bottom plate 28. Further, a stepped cylindrical body 32 that is expanded stepwise is provided on the outer cylinder 14 so as to surround the outer periphery of the suction fan 15 and the fixed blade body 22 coaxially. Further, a covered cylindrical airflow swirl cover 34 having a plurality of exhaust ports 33 is provided on the upper portion of the stepped cylinder 32. Thereby, the external appearance of the oil mist removing apparatus 10 is constituted by a three-layer structure of the outer cylinder 14, the stepped cylinder 32, and the airflow swirl cover 34 in order from the lower side.

  The radial width of the cyclone portion 18 formed between the outer cylinder 14 and the inner cylinder 13 is defined by the radial width of the bottom plate 28. Further, the lower end of the cyclone portion 18 is sealed with a bottom plate 28. Therefore, by making each inner side of the base 24, the bracket 26, and the inner cylinder 13 into a bottomless space (open), the electric motor 12 is inserted from the lower end of the inner cylinder 13 and is in contact with the upper end of the inner cylinder 13. The upper end of the electric motor 12 and the rectifying plate 31 are bolted. The inner cylinder 13 may have a covered cylindrical shape through which the output shaft 11 can pass, and the upper end of the electric motor 12 and the rectifying plate 31 may be bolted to the inwardly flanged lid portion. The rectifying openings 30 are formed in the range of the radial width of the cyclone portion 18.

  Inside the airflow swirl cover 34, an airflow swirl guide 35 and an exhaust muffler 36 disposed above the suction fan 15 are provided. The above-described plurality of exhaust ports 33... Exhaust the exhaust gas passing through the inner side from the outer periphery of the exhaust muffler 36 toward the center of the upper surface (cover surface) of the airflow swirl cover 34.

  The airflow swirl guide 35 includes a disk-shaped base plate 37 and a pair of substantially arc-shaped guide plates 39 fixed to the inside of a pair of exhaust intake ports 38, 38 formed on the outer periphery of the base plate 37. 39.

  The exhaust muffler 36 moves to the inside of the exhaust intake ports 38, 38 after the airflow discharged from the outer periphery of the suction fan 15 swirls between the outside of the exhaust intake ports 38, 38 of the base plate 37 and the airflow swirl cover 34. It is composed of a wire mesh-like substantially cylindrical body so as to take in the guided exhaust. The exhaust muffler 36 is provided with a large number of small-diameter openings formed of punching metal or the like, and can distribute and rectify the flow of the exhaust airflow. Although the air passes along with the airflow at the portion, wind noise is reflected at portions other than the small-diameter opening, and there is an effect of canceling the sound around it and reducing the sound. Note that the aperture ratio of the small-diameter opening may be as low as about 50%, and a material having a large plate thickness is preferably used.

  The intake port 16 is located between the inner cylinder 13 and the outer cylinder 14 having a central axis in the vertical direction coaxial with the rotation center (output shaft 11) of the electric motor 12, that is, an offset position that does not intersect the vertical central axis. The air is sucked into the cyclone unit 18. At this time, the intake pipe 17 connected to the outer cylinder 14 is tangential to the outer cylinder 14 orthogonal to the axial direction of the output shaft 11 so as to define the upstream side in the circumferential direction of the cyclone section 18, that is, the circumference of the cyclone section 18. The direction center line and the center axis of the intake pipe 17 are projected so as to be continuous in a tangential direction. Thereby, the intake of dust-containing airflow from the intake port 16 to the cyclone unit 18 is smoothly guided by the intake pipe 17. In addition, piping, a duct, etc. (not shown) which draw in external air (dusty air) efficiently according to the installation place of the oil mist removal apparatus 10 are connected to the front-end | tip of the intake pipe 17. FIG.

  The suction fan 15 includes a lower disk 41 having an intake opening 40 through which the output shaft 11 passes, and an upper disk 43 that is fixed to the tip of the output shaft 11 via a fan mounting flange 42 and faces the lower disk 41. And a plurality of fins 44 that are provided between the respective discs 41 and 43 and are curved so as to guide the airflow sucked from the intake opening 40 to the outer periphery according to the rotation direction of the suction fan 15. The cyclone portion 18 can be set to a negative pressure by guiding the air flow from the center side to the outer peripheral side by the plurality of fins 44, and the dust-containing air flow including oil mist can be sucked from the intake port 16. For example, the upper disk 43 may be raised in a mountain shape at the center.

  The rotating disk 19 is fixed to a midway portion of the output shaft 11 via a disk mounting flange 45. In the present embodiment, meshes 20 are provided at a plurality of positions near the peripheral edge of the rotating disk 19 so as to close the openings formed in a substantially fan shape. Note that the mesh 20 may directly form a large number of small holes in the rotating disk 19. Further, the density and the like of the mesh 20 can be appropriately set according to the power of the electric motor 12, the size of dust, the type of oil mist, and the like. The rotating disk 19 functions as an intake airflow collision acting member that rectifies the dusty airflow so that the collision entry angle of the dusty airflow into the rotating mesh 20 is stabilized. In addition, since the rotation center of the rotating disk 19 is used as a rotating shaft, when the rotating disk 19 is stopped, the balance of the rotating disk 19 is not deteriorated due to dripping and condensation of the oil mist, and vibration is generated. And noise can be kept low.

  The fixed blade body 22 guides the airflow that has passed through the rotating disk 19 toward the center side of the suction fan 15, and forms a through hole 46 through which the disk mounting flange 45 passes and a plurality of intake holes 47. Between the fixed disks 48 and 49, the lower fixed disk 48, the upper fixed disk 49 having a mountain shape toward the center so that the output shaft 11 penetrates and the airflow is intensively guided. A peripheral wall 51 provided across the peripheral edge and having the nozzle through hole 50 formed therein. The plurality of guide vanes 21 are curved between the fixed disks 48 and 49 so as to guide the airflow sucked from the cyclone unit 18 to the center side along the rotation direction of the suction fan 15. . The through hole 46 is formed at the center, and the plurality of intake holes 47 are formed between the guide vanes 21 and are opposed to the meshes 20. The upper fixed disk 49 may be configured by separately forming a peripheral flat portion and a central chevron portion.

  For example, a mesh or the like having a large number of fine gaps is used for the mesh 20... More preferably, if a large number of wires such as thin wires are fixed radially in parallel, the electric motor 12 rotates. Thus, it is possible to easily blow off the oil mist or the like colliding with the rotating disk 19 in the outer circumferential direction. A lower spray cleaner 52 and an upper spray cleaner 53 are arranged below and above the mesh 20.

  The lower spray cleaner 52 is an elbow that penetrates the outer cylinder 14 and has an upward tip, and is located below the current plate 31. As shown in FIG. 4, the lower spray cleaner 52 is disposed on the downstream side of the air inlet 16 in the airflow swirl direction that continues from the air inlet 16 to the circumferential direction of the cyclone portion 18 in plan view. At this time, it is preferable to dispose at the position farthest from the intake port 16 so that the separation effect due to the swirling airflow generated inside the cyclone portion 18 described above is ensured for as long as possible. For this reason, in the present embodiment, the lower spray cleaner 52 has a swirl airflow that is connected to the cyclone section 18 from the vicinity of the most downstream of the circulation reference (one round reference) of the dust-containing airflow in the cyclone section 18, that is, the cyclone section 18. Is provided in the cyclone portion 18 at a position immediately before reaching the intake port 16 again. By disposing the lower spray cleaner 52 in the vicinity of the most downstream of the circulation reference (one rotation reference), if relatively large dust such as chips is mixed in the dust-containing airflow, the relatively large dust As shown schematically in FIG. 4, the mesh 20 is washed after being separated to the maximum by the cyclone portion 18 upstream of the lower spray cleaner 52, so that it is inhibited by relatively large dust. The cleaning liquid can be reliably sprayed onto the mesh 20. Further, since the lower spray cleaner 52 is disposed at a position where it is difficult to interfere with the separation effect of the cyclone unit 18, the overall performance is not deteriorated.

  A lower spray nozzle 54 for injecting a mist-like cleaning liquid is attached to the tip of the lower spray cleaner 52. In the present embodiment, the lower spray nozzle 54 has a hole of about 0.5 mm opened at one place in the center. Further, as the spray angle of the lower spray nozzle 54, a wide spray angle type capable of spraying cleaning water across the entire radial width of the mesh 20 is employed. At this time, the relative distance between the lower spray nozzle 54 and the mesh 20... Is ensured according to the spray angle of the lower spray nozzle 54 (movable up and down or elbow replacement). The injection angle may be determined according to the relative distance and the width of the mesh 20. Here, the reason why the lower spray nozzle 54 of the wide spray angle type is applied is that a wide area of the mesh 20 can be sprayed in a mist shape with a small amount of cleaning liquid, which can contribute to saving of the cleaning liquid. . The lower spray nozzle 54 is of a single hole type. However, as the number of holes increases, so much washing water is required. It is preferable to apply the type.

  The cleaning liquid sprayed from the lower spray nozzle 54 passes through the rectifying openings 30 provided on the rectifying plate 31 and is sprayed to the lower surface side of the mesh 20 to mix with and adhere to the adhered fixing component and dust component. . The sticking component and dust component thus scraped off are discharged from the waste oil port 23 together with the cleaning liquid. The cleaning liquid is supplied to the lower spray cleaner 52 through the water supply pipe 55, the lower electromagnetic valve 56, and the lower flexible hose 57, and is controlled from the lower spray nozzle 54 by opening / closing control of the lower electromagnetic valve 56. The cleaning liquid is sprayed.

  The average particle diameter of the mist-like cleaning liquid sprayed from the lower spray nozzle 54 is preferably about 300 to 400 μm, which is a relatively medium mist. Further, the cleaning liquid sprayed from the lower spray cleaner 52 is intermittently repeatedly cleaned during operation (during the operation of the suction fan 15) by the control circuit unit 27 controlling the lower solenoid valve 56. A cleaning process can be performed before the adhering component and dust component adhering to the mesh 20 are adhered (stuck), and the mesh 20 can be efficiently cleaned while saving the cleaning liquid. For example, as the operation of repeatedly performing the cleaning repeatedly, the cleaning is performed for several seconds to several tens of seconds, the cleaning is stopped for several tens of minutes to several hours, and then the cleaning is performed again for several seconds to several tens of seconds. At this time, the set time such as the cleaning time and the idle time can be set and selected according to the use environment such as the concentration of the oil mist to be sucked and the degree of contamination of the mesh 20.

  In the upper spray cleaner 53, upper spray nozzles 58 that inject the cleaning liquid into the fixed blade body 22 from the nozzle through hole 50 through the stepped cylinder 32 face horizontally, as shown in FIG. It arrange | positions facing the mesh 20 .... The specific shape of the upper spray cleaner 53 is a pipe shape (hollow) having a diameter of several tens of millimeters (φ14), and the upper spray nozzles 58 for injecting the cleaning liquid have a plurality of round holes of several mm degrees (φ4 mm). Individually formed (for example, three).

  The upper spray nozzles 58 are inclined and opened with respect to the vertical direction. For example, as shown in FIG. 6, the angle θ at which the upper spray nozzles 58 are inclined with respect to the vertical direction is preferably about 30 to 45 °. Thus, the upper spray nozzles 58... Rotate in a direction opposite to the rotation direction of the rotating disk 19 in the operating state of the electric motor 12 collecting oil mist and the like from the dust-containing airflow with the mesh 20. The angle formed with the rotating disk 19 in a state where the plate 19 rotates is an acute angle. In this way, the upper spray nozzles 58 are inclined with respect to the vertical direction, and the cleaning liquid is sprayed obliquely onto the mesh 20. Rotating in the direction opposite to the direction (in the direction of arrow F in FIG. 5), the entire surface of the rotating disk 19 and the mesh 20 can be cleaned. At this time, when the electric motor 12 is stopped and the rotating disk 19 rotates in the opposite direction to that during operation, the suction fan 15 also rotates accordingly. However, since this rotation is also opposite to that during operation, the suction fan The suction force of 15 does not act on the cyclone portion 18, and the cleaning liquid, the fixed component and the dust component do not splash from the exhaust port 33. At this time, since the lower spray nozzle 54 is cleaned during operation and the suction force of the suction fan 15 acts, the spray pressure of the cleaning liquid can be small, so that a spray nozzle with a wide spray angle can be used. . On the other hand, since the upper spray nozzles 58 are cleaned while the operation is stopped, an injection pressure for removing the dirt is required, and the cleaning water is sprayed obliquely onto the mesh 20 to thereby rotate the rotating disk. An injection pressure sufficient to rotate 19 is required. Therefore, in this embodiment, a plurality of round holes of about several mm are opened. That is, in the case of a single round hole as in the case of the lower spray nozzle 54, if the above-mentioned pressure is ensured, the spray angle is relatively narrow, so that the entire radial direction of the mesh 20 cannot be washed at one time. End up.

  In the upper spray cleaner 53, the upper electromagnetic valve 59 is controlled by the control circuit unit 27, and after the fan stops (after the rotating disk 19 stops), the cleaning liquid is sprayed to perform the cleaning operation. The time is about several seconds to several tens of seconds, and can be set by the control circuit unit 27 described later (see FIG. 7) depending on the concentration of the mist to be sucked and the degree of contamination of the mesh 20. .

  The cleaning liquid is supplied to the upper spray cleaner 53 through the water supply pipe 55, the upper electromagnetic valve 59, and the upper flexible hose 60, and the cleaning liquid is ejected from the upper spray nozzles 58. The The upper spray cleaner 53 sprays the cleaning liquid from above the mesh 20 (rotating disc 19), so that the adhering component or dust component adhered to the upper surface of the mesh 20 that is difficult to be removed by the cleaning by the lower spray cleaner 52. Can be washed. The fixed component and dust component peeled off from the mesh 20 are discharged from the waste oil port 23 together with the cleaning liquid.

  Although not shown in detail, the control circuit unit 27 includes a control board for controlling the electric motor 12 and the electromagnetic valves 56 and 59, a terminal block for power connection, and the like. Further, the control board is equipped with a dip switch or the like, and various cleaning times (such as the cleaning time of the lower spray cleaner 52, the cleaning time of the upper spray cleaner 53, and the cleaning pause time) can be set. . Further, the control circuit unit 27 includes an operation button that starts when the button is pressed, a stop button that stops when the button is pressed, an energization lamp that lights when energized, an operation lamp that lights during operation (fan activation), and cleaning. Equipped with a lighting lamp that lights up.

  On the side of the control circuit unit 27, a lower solenoid valve 56 for controlling the supply of cleaning liquid to the lower spray cleaner 52 and the upper spray cleaner 53 connected to the flexible hoses 57 and 60, and Upper electromagnetic valves 59 are provided respectively. For example, when tap water is used as the cleaning liquid, the lower solenoid valve 56 and the upper solenoid valve 59 are connected to a water supply pipe 55 connected to a water supply pipe or a faucet (not shown). Tap water which is a cleaning liquid is supplied to the lower spray cleaner 52 and the upper spray cleaner 53 by the control of the valves 56 and 59. When tap water is used as the cleaning liquid, the water pressure when the lower solenoid valve 56 and the upper solenoid valve 59 are opened is suitably 0.1 to 0.3 (MPa).

  Next, the operation of cleaning the mesh 20 in the oil mist removing apparatus 10 of the present invention is based on the operation time of the lower spray cleaner 52 and the upper spray cleaner 53 based on the time chart of FIG. This will be described using T1 to T5.

  When the operation of the oil mist removing apparatus 10 is started in the upper part of the time chart (for example, the operation button of the control circuit unit 27 is pressed), the operation is performed after the operation time T1 (sec) has elapsed in the middle part of the time chart showing the lower spray cleaner 52. During the time T2 (sec), the lower solenoid valve 56 is opened, and the cleaning liquid is ejected from the lower spray nozzle 54.

  Further, the lower solenoid valve 56 is closed during the operation time T3 (hr) in the middle part of the time chart, and after the spray of the cleaning liquid is stopped from the lower spray nozzle 54, the operation time T2 ( sec), the lower solenoid valve 56 is opened, and the cleaning liquid is ejected from the lower spray nozzle 54. Thereafter, for the lower spray cleaner 52, the operation times T2 and T3 are sequentially repeated until the operation of the oil mist removing apparatus 10 is stopped (for example, the stop button of the control circuit unit 27 is pressed).

  Further, when the operation of the oil mist removing device 10 is stopped, the upper solenoid valve 59 is opened during the operation time T5 (sec) after the operation time T4 (sec) has elapsed in the lower part of the time chart, and the upper spray nozzle 58. The cleaning liquid is sprayed from. In the present embodiment, the operation time T5 is set to a time for which the rotating disk 19 rotates several times (for example, three laps) according to the spraying pressure of the cleaning liquid, and the number of times of cleaning is set every time the operation is stopped. Once.

  In this embodiment, the operation times T1 to T5 described above are T1 = 30 (sec), T2 = 2 to 30 (sec), T3 = 0.5 to 8 (hr), T4 = 30 (sec), Although T5 = 2 to 60 (sec), the operation times T1 to T5 can be appropriately set and selected according to the amount, properties, operation time, and the like of the oil mist contained in the dust-containing air to be sucked. In addition to the tap water, the cleaning liquid of this embodiment may be detergent-containing hot water or water, steam, alkaline electrolytic water, or the like, and the upper spray cleaner 53 may use compressed air.

  In the above-described configuration, the oil mist removing device 10 is configured so that the airflow including the oil mist from the intake port 16 to the intake airflow swirling action of the cyclone unit 18 (see FIG. 8A). The relatively large dust in the oil mist is agglomerated along the inner wall of the outer cylinder 14 and is dropped onto the bottom plate 28 and discharged to the outside through the waste oil port 23.

  On the other hand, fine dust or oil mist rises between the outer cylinder 14 and the inner cylinder 13 while swirling by the swirling action of the intake airflow (see FIG. 8A), and the rectifying blades 29 of the rectifying plate 31 are inclined. Due to the initial airflow rectification initial action (see FIG. 8B) generated along with the arrangement, the airflow rising along the direction of the swirling airflow from the cyclone 18 further enters the collision in the direction opposite to the rotational direction of the rotating disk 19. Rectification is performed while the angle is stable.

  Next, the rotating disk 19 functions as an intake airflow collision action (see FIG. 8C) that removes oil mist by colliding with the rotating mesh 20 ... with the airflow stably rectified in the collision entry angle. To do. The airflow that has passed through the mesh 20 is swirled in the rotational direction of the fixed blade body 22.

  Further, the fixed blade body 22 has the same rotational direction as that of the rotary disk 19 so as to guide the airflow passing through the rotary disk 19 between the rotary disk 19 and the suction fan 15 to the intake opening 40 of the suction fan 15. The plurality of guide vanes 21 curved in a direction for guiding the airflow swirling in the direction to the center of the fixed blade body 22 functions as an intake airflow rectification action (see FIG. 8D). In this intake airflow rectification action (see FIG. 8 (d)), the flow of the clean airflow that has passed through the outer periphery due to the collision of the oil mist in the airflow and the mesh 20 in the rotating disk 19 is rectified. .

  The suction fan 15 generates an airflow suction / discharge action (see FIG. 8 (e)) that exhausts the airflow to the outer periphery by the rotation, and this airflow suction / discharge action (see FIG. 8 (e)) is actually performed from the intake port 16. The action of taking in airflow is generated.

  The airflow swirling guide 35 functions as an exhaust airflow swirling action (see FIG. 8 (f)) that swirls the exhaust airflow from the suction fan 15 in the same direction as the rotation direction of the suction fan 15 in cooperation with the airflow swirl cover 34. . In other words, the airflow swirl guide 35 is released in the exhaust airflow swirl direction and is shielded in the reverse direction, and is disposed in the upper part of the secondary side of the suction fan 15 so as to be able to circulate through the communication port, thereby converting the exhaust airflow into the swirl airflow. To do. Then, the exhaust ports 33 ... exhaust the exhaust air flow imparted with the swirling action to the outside as it is (see FIG. 8G).

  Thus, according to the oil mist removing apparatus 10, since no filter is used, filter clogging does not occur, and maintenance for filter replacement is unnecessary.

  At this time, the rotation direction of the rotating disk 19 has a rotation axis in a substantially vertical direction, and the balance of the rotating disk 19 is not deteriorated due to dripping and condensation of the oil mist at the time of stopping, and vibration and noise are generated. It can be kept low.

  Further, the stationary blade body 22 that guides the airflow to the suction fan 15 with the guide vanes 21 between the rotating disk 19 and the suction fan 15 causes the oil mist in the airflow on the rotating disk 19 to collide with the mesh 20. By rectifying the flow of the clean airflow that has passed through the outer periphery, the suction efficiency of the suction fan 15 can be maintained high, and the exhaust airflow is turned into a swirling airflow, so that the exhaust air from the exhaust ports 33. The efficiency is also increased, the exhaust noise is reduced, and at the same time the suction efficiency of the suction fan 15 can be increased. As a result, the power consumption of the electric motor 12 can be reduced.

DESCRIPTION OF SYMBOLS 10 ... Oil mist removal apparatus 11 ... Output shaft 12 ... Electric motor 13 ... Inner cylinder 14 ... Outer cylinder 15 ... Suction fan 16 ... Intake port 17 ... Intake pipe 18 ... Cyclone part 19 ... Rotating disk 20 ... Mesh 52 ... Lower side Spray cleaner 53 ... Upper spray cleaner 54 ... Lower spray nozzle 55 ... Water supply piping 56 ... Lower solenoid valve 57 ... Lower flexible hose 58 ... Upper spray nozzle 59 ... Upper solenoid valve 60 ... Upper flexible hose

Claims (9)

  An electric motor having an axis in a substantially vertical direction, a substantially cylindrical inner cylinder that coaxially surrounds the outer periphery of the electric motor with a predetermined interval, and an outer periphery of the inner cylinder coaxially with a predetermined interval A substantially cylindrical outer cylinder surrounded by a suction fan, a suction fan that is fixed to the output shaft of the electric motor and guides airflow from the center side to the outer peripheral side, and provided on the outer wall surface of the outer cylinder. An intake port communicating with the outside and the inside, a cyclone portion formed below the suction fan so as to separate the airflow sucked from the intake port by the negative pressure generated in association with the rotation of the suction fan, A rotating disk that is arranged between the electric motor and the suction fan and rotates coaxially with the output shaft, and a plurality of the rotating disks that are provided near the outer periphery of the rotating disk and collide with each other when rotating. A mesh that exerts on the rotating disk and Oil mist removing apparatus being characterized in that the lower spray scrubber, a provided for injecting the washing liquid from below the rotary disc towards the serial mesh.   2. The oil mist removing apparatus according to claim 1, wherein the lower spray cleaner performs a cleaning operation intermittently and repeatedly in a state where the electric motor is driven.   3. The lower spray cleaner is provided in the cyclone unit at a position immediately before a swirling air flow that continues from the intake port to the cyclone unit reaches the intake port again. The oil mist removing apparatus described in 1.   4. The oil mist according to claim 1, wherein the lower spray cleaner includes a lower spray nozzle that jets cleaning water across the entire radial width of the mesh. 5. Removal device. An electric motor having an axis in a substantially vertical direction, a substantially cylindrical inner cylinder that coaxially surrounds the outer periphery of the electric motor with a predetermined interval, and an outer periphery of the inner cylinder coaxially with a predetermined interval A substantially cylindrical outer cylinder surrounded by a suction fan, a suction fan that is fixed to the output shaft of the electric motor and guides airflow from the center side to the outer peripheral side, and provided on the outer wall surface of the outer cylinder. An intake port communicating with the outside and the inside, a cyclone portion formed below the suction fan so as to separate the airflow sucked from the intake port by the negative pressure generated with the rotation of the suction fan, A rotating disk that is arranged between the electric motor and the suction fan and rotates coaxially with the output shaft, and a plurality of the rotating disks that are provided near the outer periphery of the rotating disk and collide with each other when rotating. A mesh that exerts on the rotating disk and And a upper spray scrubber for injecting washing liquid from above the rotating disk towards the serial mesh,
The oil mist removing apparatus, wherein the cleaning liquid sprayed from the upper spray cleaner is sprayed with an inclination with respect to a direction perpendicular to the rotating disk.   An electric motor having an axis in a substantially vertical direction, a substantially cylindrical inner cylinder that coaxially surrounds the outer periphery of the electric motor with a predetermined interval, and an outer periphery of the inner cylinder coaxially with a predetermined interval A substantially cylindrical outer cylinder surrounded by a suction fan, a suction fan that is fixed to the output shaft of the electric motor and guides airflow from the center side to the outer peripheral side, and provided on the outer wall surface of the outer cylinder. An intake port communicating with the outside and the inside, a cyclone portion formed below the suction fan so as to separate the airflow sucked from the intake port by the negative pressure generated in association with the rotation of the suction fan, A rotating disk that is arranged between the electric motor and the suction fan and rotates coaxially with the output shaft, and a plurality of the rotating disks that are provided near the outer periphery of the rotating disk and collide with each other when rotating. A mesh that exerts on the rotating disk and A lower spray cleaner for injecting cleaning liquid from below the rotating disk toward the mesh, and an upper spray cleaner for injecting cleaning liquid from above the rotating disk toward the rotating disk and the mesh, An oil mist removing device characterized by comprising:   The lower spray cleaner sprays the cleaning liquid intermittently while the electric motor is driven, and the upper spray cleaner sprays the cleaning liquid after the electric motor stops driving. The oil mist removing apparatus according to claim 6.   The oil mist removing apparatus according to claim 6 or 7, wherein the cleaning liquid sprayed from the upper spray cleaner is sprayed with an inclination with respect to a direction perpendicular to the rotating disk.   9. The cleaning liquid sprayed from the upper spray cleaner is inclined so as to be sprayed in a counter direction with respect to a rotating direction of the rotating disk driven by the electric motor. The oil mist removing apparatus as described.

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