JP6514802B2 - Oil mist removal device - Google Patents

Description

  The present invention relates to an oil mist removing device for separating and removing an oil mist from a dust-containing gas stream generated from a processing machine or the like in a factory.

  In general, an oil mist removing device is used to collect oil mist from oil containing dust (oil smoke) containing oil mist generated from a processing machine or the like in a factory to separate and remove the oil mist.

  As a conventional oil mist removing device, for example, as shown in FIG. 9, a rotating disk 1 rotated by an electric motor and an air flow provided in the vicinity of the outer periphery of the rotating disk 1 and flowing up and down It is known to have a mesh 2 which exerts an impact action and an upper spray cleaner 3 provided at a predetermined position θ inclined to the mesh 2 at one place above the rotating disk 1. Then, in this type of oil mist removing device, while the electric motor is stopped, the upper spray cleaner 3 sprays the cleaning solution from one direction which is inclined to the mesh 2 so that the oil mist adheres to the mesh 2 It is designed to wash away the sticking component and the dust component of the above (see Patent Document 1).

JP 2012-55839 A

  However, in the oil mist removing device described in Patent Document 1 described above, the upper spray cleaner 3 provided at one place is configured to spray the cleaning solution from one direction inclined to the mesh 2 Therefore, a part of the mesh (hatched part in FIG. 9) becomes a blind spot and can not be washed to every corner of the mesh 2, and there is a possibility that the mesh 2 may be left unwashed. Therefore, it is difficult to remove all the adhering components and dust components adhering to the mesh 2, and there is a problem that it becomes difficult to perform stable and reliable collection and separation of the oil mist.

  The present invention has been made to solve the above-described problems, and provides a mist removing device capable of stably and reliably collecting and separating and removing the adhering component and dust component of oil mist adhering to the mesh. The purpose is to

A first oil mist removing device according to the present invention is an oil mist removing device for separating and removing oil mist in dusty air, and is provided on a rotating disc provided rotatably and the rotating disc. And a mesh that collects oil mist when the air stream collides, and a spray cleaner that performs a cleaning operation that sprays the cleaning solution, and the spray cleaner cleans the cleaning solution from one direction inclined with respect to the mesh. The first spray nozzle generates a moment for rotating the rotating disc in one direction by spraying, and the cleaning disc is rotated in the other direction by spraying the cleaning liquid from the other direction inclined to the mesh. And a second spray nozzle that generates a moment.
A second oil mist removing device according to the present invention is characterized by comprising a motor and a suction fan which forms an air flow by driving the motor.
In the third oil mist removing device of the present invention, the motor has an output shaft formed in the upstream and downstream directions, the suction fan is fixed to the output shaft of the motor, and the air flow toward the downstream is driven by the motor It is characterized by forming.
A fourth oil mist removing device according to the present invention is characterized in that the spray cleaner carries out a cleaning operation of injecting a cleaning solution when the motor is not driven.
The fifth oil mist removing device according to the present invention is characterized in that the spray cleaner is disposed apart from the rotating disc.
A sixth oil mist removing device according to the present invention is characterized in that the spray cleaner is spaced apart and disposed downstream of the rotating disc.
The seventh oil mist removing device according to the present invention is characterized in that the mesh collects oil mist when the air flow directed downstream collides.

  According to the first to seventh oil mist removing devices of the present invention described above, the spray cleaner sprays the cleaning fluid from the other direction with the first spray nozzle that sprays the cleaning fluid from one direction inclined to the mesh. Since the spray nozzle is provided, the entire mesh can be thoroughly cleaned. Further, when the mesh is cleaned, the rotating disc can be rotated by injecting the cleaning solution, and motor power is not required, which can enhance the economic efficiency.

  The eighth oil mist removing device according to the present invention is characterized in that a cleaning cycle in which the cleaning operation by the second spray nozzle is performed after the cleaning operation by the first spray nozzle is repeated.

  According to the above-described eighth oil mist removing device of the present invention, since the operation of changing the rotation speed of the rotating disk can be repeated, the inertia effect of the rotating disk along with the washing effect by the cleaning operation of the spray cleaner. The stains can also be washed away by this method, and the stains attached to the mesh can be effectively removed.

  In the ninth oil mist removing device according to the present invention, the cleaning operation by the second spray nozzle is performed until the rotating disk, which is rotating in the reverse direction by the cleaning operation of the first spray nozzle, is stopped. It is characterized by

  According to the above-described ninth oil mist removing apparatus of the present invention, since the rotating disc does not rotate in the forward direction when the mesh is cleaned by the spray cleaner, the cleaning liquid generated by the forward rotation of the rotating disc Can be prevented from scattering from the opening (exhaust port) to the outside of the oil mist removing device.

  The tenth oil mist removing device of the present invention further comprises a rotational direction detecting means for detecting the rotational direction of the motor or the rotary disc, and the motor or the rotary disc being stopped is detected by the rotational direction detecting means. And stop the cleaning operation by the second spray nozzle.

  According to the above-described tenth oil mist removing device of the present invention, since the rotation direction detecting means is provided, the cleaning operation by the second spray nozzle can be accurately stopped when the motor or the rotating disk is stopped. it can. Therefore, since the rotating disc does not rotate in the forward direction when the mesh is cleaned by the spray cleaner, droplets of the cleaning liquid generated by the forward rotation of the rotating disc are scattered from the opening to the outside of the oil mist removing device. Can be prevented.

  Further, in an eleventh oil mist removing device according to the present invention, the cleaning operation by the second spray nozzle is performed by the cleaning operation of the first spray nozzle, and the rotating disk rotates in the reverse direction. It is characterized by continued even after it has been started.

  According to the above-described eleventh oil mist removing device of the present invention, the dirt attached to the mesh 36 can be removed more effectively.

  Further, according to a twelfth oil mist removing device of the present invention, a connecting pipe for guiding dust-containing air from a generation source, a differential pressure detecting means for detecting a differential pressure between the upstream side and the downstream side of the air flow direction of the mesh; And control means for controlling the number of rotations of the rotating disc in the reverse direction based on data concerning the connecting pipe and the detection result of the differential pressure detection means.

  According to the above-described twelfth oil mist removing device of the present invention, since the droplets of the cleaning solution generated by the reverse rotation of the rotating disk do not enter the inside of the generation source, rust is generated in the generation source, etc. It can prevent adverse effects.

  The present invention can stably and reliably capture and separate and remove the fixed components and dust components of the oil mist attached to the mesh, and can improve the cleaning effect of the mesh, and various other advantageous effects. You can get

It is a longitudinal section showing an oil mist removal device concerning an embodiment of the invention. It is a plane sectional view showing the oil mist removal device concerning an embodiment of the invention. In the oil mist removal apparatus according to the embodiment of the present invention, (A) is an enlarged side view showing the first spray nozzle seen from the arrow X in FIG. 2, (B) seen from the arrow Y in FIG. It is an enlarged side view showing the 2nd spray nozzle. It is a schematic diagram which shows the spray cleaner of the oil mist removal apparatus which concerns on embodiment of this invention. It is a longitudinal cross-sectional view which shows the state which connected the oil mist removal apparatus which concerns on embodiment of this invention to the oil mist generation source. It is a block diagram showing a control unit of an oil mist removal device concerning an embodiment of the invention. The oil mist removal apparatus which concerns on embodiment of this invention WHEREIN: It is a time chart which shows an example of a washing | cleaning timing. The oil mist removal apparatus which concerns on embodiment of this invention WHEREIN: It is a time chart which shows another example of a washing | cleaning timing. It is an enlarged side view showing the upper side spray cleaner of the conventional oil mist removal device.

  Hereinafter, an oil mist removing device according to an embodiment of the present invention will be described in detail with reference to the drawings. The embodiment described below is a preferable example of the present invention, and may have various technically preferable limitations, but the technical scope of the present invention particularly describes the present invention. As long as it does not exist, it is not limited to these aspects.

  As shown in FIGS. 1 and 2, the oil mist removing device 10 includes an electric motor 12 with an output shaft 11 extending upward, a suction fan 13 fixed to the upper portion of the output shaft 11, and an output shaft A rotating disk 14 fixed to the lower part of 11, a straightening unit 15 provided between the suction fan 13 and the rotating disk 14, a spray cleaner 16 provided above the rotating disk 14, a suction fan 13 And an exhaust unit 17 provided above the housing 18 and disposed inside the casing 18. The casing 18 has a bottomed cylindrical shape with a center around the output shaft 11, and a suction port 19 protrudes from the outer peripheral wall surface of the casing 18 in a tangential direction. Also, a control circuit unit 29 is fixed to the outer peripheral wall surface of the casing 18.

  The lower end of the motor body 20 of the electric motor 12 is fixed to the pedestal 21. An inner cylinder 24 is formed on the outer periphery of the motor body 20 so as to surround the motor body 20. The inner cylinder 24 has a substantially cylindrical shape centering on the output shaft 11, and the upper end thereof is formed in a conical shape so as to become smaller in diameter upward. The lower end of the inner cylinder 24 is supported by the bottom surface 25 of the casing 18, and the bottom surface 25 is supported by the pedestal 21 via a plurality of vibration damping dampers 26. On the other hand, the upper end of the inner cylinder 24 supports a disk-shaped straightening vane 28 having a plurality of straightening holes 27, and the outer peripheral edge of the straightening vane 28 is supported on the inner surface of the casing 18. Thus, a cyclone portion 30 is formed between the inner cylinder 24 and the lower half portion 18 a of the casing 18, and the lower end of the cyclone portion 30 is sealed by the bottom plate 25.

  The suction fan 13 includes a lower disc 32 having an intake opening, an upper disc 33 provided to face the lower disc 32, and a plurality of fins provided between the upper disc 33 and the lower disc 32. And 34 are configured. The output shaft 11 penetrates up and down at the center of the suction fan 13, and the upper disk 33 is fixed to the upper end of the output shaft 11 via the fin mounting flange 35 so that the suction fan 13 is fixed to the output shaft 11 . The plurality of fins 34 are curved and formed so as to guide the air flow drawn from the suction opening in the outer peripheral direction according to the rotation direction of the suction fan 13. As a result, the suction fan 13 can guide the air flow from the center side to the outer circumference side to make the cyclone unit 30 negative pressure, and can suction dust-containing air flow including oil mist from the suction port 19.

  The rotating disc 14 is fixed to the lower part of the output shaft 11 via a disc mounting flange 35, and can be rotated in the forward direction (clockwise direction in FIG. 2) when the electric motor 12 is driven. On the outer peripheral portion of the rotary disk 14, fan-shaped meshes 36 are provided at a predetermined interval at a plurality of locations (eight locations in the present embodiment) along the circumferential direction. The mesh 36 is formed of, for example, a mesh having a large number of fine air gaps, and more preferably, a large number of fine wires such as thin wires are radially fixed in parallel. As a result, oil mist or the like that collides with the rotary disc 14 by the rotation of the electric motor 12 can be easily repelled in the outer peripheral direction. The mesh 36 may be formed with a large number of small holes directly in the rotary disk 14. The density of the mesh 36 depends on the output of the electric motor 12, the size of dust, the type of oil mist, etc. It can be set appropriately.

  The straightening unit 15 is fixed to a support disc 37 through which the output shaft 11 passes through the center, and the support disc 37 has a circulation hole 38 centered on the output shaft 11, and the periphery of the support disc 37 is the casing 15. It is supported on the inside. The rectifying unit 15 includes a substantially cylindrical fixed blade 40 fixed to the lower side of the support disc 37, and a substantially cylindrical tubular body 41 fixed to the upper side of the support disc 37, and is fixed. The blade 40 and the cylindrical body 41 communicate with each other through the through hole 38. The fixed blade 40 includes a fixed disk 42 formed facing the flow hole 38 of the support disk 37, and a plurality of guide blades 43 formed between the support disk 37 and the fixed disk 42. And a plurality of intake holes (not shown) are formed in the peripheral wall of the fixed blade 40 so as to communicate with the respective guide blades 43. By configuring the rectifying unit 15 in this manner, the air flow passing through the mesh 36 can be guided toward the intake opening on the center side of the suction fan 13.

  As shown in FIGS. 1 to 4, the spray cleaner 16 includes a first spray nozzle 45 and a second spray nozzle 46 which are provided in the support disc 37 above the outer peripheral portion of the rotary disc 14. , And a water supply facility 48 for supplying water from the tap water supply source 47 to the first spray nozzle 45 and the second spray nozzle 46.

  The first spray nozzle 45 and the second spray nozzle 46 have elbows whose tips are directed downward, and form a central angle of 90 degrees with the output shaft 11 in plan view, as shown in FIG. Two each are alternately arranged along the circumferential direction. In addition, a shielding plate 50 is suspended from the support disc 37 along the outer peripheral edge of the rotary disc 14 outside the first spray nozzle 45 and the second spray nozzle 46.

  The 1st spray nozzle 45 is arrange | positioned by the attitude | position in which the predetermined angle (theta) 1 inclined to the circumferential direction one side with respect to the perpendicular direction, as FIG. 3 (A) shows. Thus, the first spray nozzle 45 sprays the cleaning liquid from one direction inclined in the circumferential direction with respect to the mesh 36 to rotate the rotary disc 14 in the direction opposite to the rotation direction when the electric motor 12 is driven (FIG. 2 Counterclockwise) can be generated.

  As shown in FIG. 3B, the second spray nozzle 46 is inclined at a predetermined angle θ2 to the other side in the circumferential direction opposite to the inclination direction of the first spray nozzle 45 with respect to the vertical direction. It is arranged. As a result, the second spray nozzle 46 sprays the cleaning liquid from the other direction that is inclined in the circumferential direction opposite to the one direction with respect to the mesh 36, thereby rotating the rotary disc 14 when the electric motor 12 is driven. A moment can be generated to rotate in the same direction (clockwise in FIG. 2).

  The number and arrangement of the first spray nozzle 45 and the second spray nozzle 46 are not limited to those described above. For example, one first spray nozzle 45 and one second spray nozzle 46 are output. The central angle may be installed at a position opposite to the axis 11 so as to form an angle of 180 degrees, or the number of installed first spray nozzles 45 and the number of installed second spray nozzles 46 may be different. The inclination angle θ1 of the first spray nozzle 45 and the inclination angle θ2 of the second spray nozzle 46 may be the same or different.

  The water supply equipment 48 includes a solenoid valve 51 attached to the control circuit unit 29, a main water supply pipe 52 from the tap water supply source 47 to the solenoid valve 51, and a first branch water supply pipe from the solenoid valve 51 to the first spray nozzle 45. 53 and a second branch water supply pipe 54 from the solenoid valve 51 to the second spray nozzle 46.

  The solenoid valve 51 may be a two-way solenoid valve installed corresponding to each of the first branch water supply pipe 53 and the second branch water supply pipe 54 as shown in FIG. 2, or as shown in FIG. It may be a three-way solenoid valve. The water pressure when the solenoid valve 51 is opened is preferably set in the range of 0.1 to 0.3 MPa.

  As shown in FIG. 4, a two-way solenoid valve 55 and a filtration filter 56 are connected to the main water supply pipe 52 in order from the tap water supply source 47 side. Moreover, the regulator 57 and the flow meter 58 are connected to the 1st branch water supply piping 53 and the 2nd branch water supply piping 54 sequentially from the solenoid valve 51 side, respectively. The regulator 57 has a function to adjust the water supply pressure, and the flow meter 58 has a function to measure the amount of water supply. The control circuit unit 29 monitors the value of the flow meter 58 while the first spray nozzle 45 and the first 2) The regulator 57 is controlled so that the injection pressure from the spray nozzle 46 becomes an appropriate value. The regulator 57 and the flow meter 58 are not necessarily provided when the water pressure of the tap water supply source 47 is stable or when the adjustment of the water pressure is unnecessary.

  The first branch water supply pipe 53 and the second branch water supply pipe 54 respectively penetrate the upper half portion 18 b of the casing 18 as shown in FIG. 2 and the outer periphery of the casing 18 above the support disc 37. It is disposed along the inner wall surface and connected to the first spray nozzle 45 and the second spray nozzle 46 via the branch joint 60 and the flexible hose 61.

  Referring again to FIG. 1, the exhaust unit 17 is configured by providing an exhaust muffler 63 inside a cylindrical-shaped exhaust cover 62 with a bottom. The exhaust cover 62 includes a disk-shaped base plate 64 and a cylindrical outer peripheral wall 65 erected on the outer peripheral edge of the base plate 64. An exhaust inlet (see FIG. Not shown) is formed.

  The exhaust muffler 63 is formed of a wire mesh-like substantially cylindrical body having an exhaust port 59 formed at a central portion, and a large number of small diameter openings formed of punching metal or the like are provided. This makes it possible to disperse and rectify the flow of the exhaust, and the wind noise due to the air flow at the time of the exhaust is reflected at the small diameter opening other than the small diameter opening which passes along with the air flow. A cancellation effect occurs and a sound reduction effect can be produced. The opening ratio of the small diameter opening may be as low as about 50%, and it is preferable to use a thick material.

  The suction port 19 is offset between the inner cylinder 24 having a central axis in the vertical direction coaxial with the output shaft 11 of the electric motor 12 and the lower half portion 18a of the casing 18, that is, an offset position not intersecting with the vertical central axis. The cyclone unit 30 is capable of sucking dust-containing air. Further, an oil outlet 66 is formed in the lower portion of the lower half portion 18 a of the casing 18, and a portion of the oil outlet 66 is lower than the upper surface of the bottom plate 25 of the casing 18.

  Further, as shown in FIG. 5, the suction port 19 is connected to a connection pipe 68 for guiding dust-containing air from a mist generation source 67 such as a processing machine in a factory. It is formed by The oil mist in the dust-containing air generated from the mist generation source 67 includes, in addition to the oil mist itself, a fixed component mainly composed of dust including oil mist, and fine abrasive powder or cutting powder to which the oil mist adheres. And other dust components, mainly dust.

  As shown in FIGS. 4 and 6, the control circuit unit 29 includes a CPU 70 for controlling the electric motor 12, the solenoid valves 51 and 55, the regulator 57, etc., a rotation direction detection means 22, and a rotation. A number detection means 23, a flow meter 58, and a storage unit 72 for storing a detected value from the differential pressure gauge 71 and the like are provided.

  The rotational direction detection means 22 detects the rotational direction of the electric motor 12 or the rotary disc 14 in order to determine the injection time of the cleaning liquid by the second spray nozzle 46, and may be detected by, for example, a sensor or It includes those using detection by the back electromotive force of the electric motor 12 or using the electric motor 12 having a function of outputting the rotation direction. Further, the rotation speed detection means 23 includes one that detects the rotation speed of the electric motor 12 or the rotary disk 12 by a sensor such as an encoder. Further, the differential pressure gauge 71 detects a differential pressure between the upstream side and the downstream side of the mesh 36 in the air flow direction, and outputs a clogging state of the mesh 36.

  The control circuit unit 29 also includes setting input means 73 for inputting data such as the type and length L of the connection pipe 68 and the inner diameter D (see FIG. 5) and the cleaning time and stop time of the spray cleaner 16. , Display means 74 for displaying data input to the setting input means 73, Operation switch 75 for starting or stopping the oil mist removing device 10, External connected with the control device 76 of the mist generation source 67 A communication unit 77 is provided.

  In the oil mist removing device 10 having the above-described configuration, as indicated by the arrow in FIG. 1, the oil mist led from the suction port 19 to the inside of the casing 18 by the suction action accompanying the rotation of the suction fan 13. The dust-containing air containing this is swirled by the centrifugal action in the cyclone unit 30, and cutting powder or the like having a relatively large particle diameter in the dust-containing air condenses along the inner surface of the lower half 18a of the casing 18 to form the bottom plate 25. And drained from the oil outlet 66 to the outside.

  Thereafter, the dust-containing air in the cyclone unit 30 rises while swirling between the casing 18 and the inner cylinder 24, and is rectified by the straightening plate 28, and then collides with the mesh 36 of the rotating disk 14 from below.

  Thereby, the oil mist in the dust-containing air is collected by the mesh 36 and repelled to the outer periphery, and the repelled oil mist falls to the bottom plate 25 and is discharged to the outside from the oil outlet 66.

  Thus, the air that has passed through the mesh 36 and has been cleaned of oil mist is uniformly rectified in the rectifying unit 15 and guided by the suction fan 13 and rectified and diffused in the exhaust muffler 63 to reduce noise. After being discharged, the exhaust port 59 is exhausted to the outside.

  Next, the cleaning operation of the mesh 36 by the spray cleaner 16 of the oil mist removing apparatus 10 according to the embodiment of the present invention will be described mainly with reference to the time chart of FIG. 7.

  When the operation of the oil mist removing device 10 is started by pressing the operation switch 75 of the control circuit unit 29 or the like, the rotary disc 14 is moved in the forward direction (clockwise direction in FIG. 2) as the electric motor 12 is driven. To rotate. At this time, the spray cleaner 16 is stopped, and the cleaning fluid is not jetted from the first spray nozzle 45 and the second spray nozzle 46.

  Then, when the operation of the oil mist removing device 10 is stopped by pressing the operation switch 75 of the control circuit unit 29 again or the like, the rotary disc 14 is stopped with the stop of the driving of the electric motor 12. After stopping the rotating disk 14, when a predetermined time elapses, the solenoid valves 51 and 55 are controlled to open and close by the command from the control circuit unit 29, and the main water supply pipe 52 and the first branch water supply from the tap water supply source 47 Water is supplied to the first spray nozzle 45 through the pipe 53, and water, which is a cleaning liquid, is sprayed from the first spray nozzle 45 to the mesh 36. At this time, as shown in FIG. 3A, the first spray nozzle 45 sprays the cleaning solution onto the mesh 36 in a state in which the first spray nozzle 45 is inclined at a predetermined angle θ1 to one side in the circumferential direction with respect to the vertical direction. A rotating moment acts on the plate 14 in the direction opposite to the direction of rotation of the electric motor 12 when it is driven, and the rotating disc 14 rotates in the reverse direction (counterclockwise in FIG. 2).

  As described above, after the cleaning liquid is jetted from the first spray nozzle 45, when the predetermined time set in advance passes, the solenoid valve 51 is controlled to open / close by the command from the control circuit unit 29, and the tap water supply source 47 Water is supplied to the second spray nozzle 46 through the main water supply pipe 52 and the second branch water supply pipe 54. Thus, the injection of the cleaning liquid from the first spray nozzle 45 to the mesh 36 is stopped, and the injection of the cleaning liquid from the second spray nozzle 46 to the mesh 36 is started. At this time, as shown in FIG. 3B, the second spray nozzle 46 sprays the cleaning solution onto the mesh 36 in a state in which the second spray nozzle 46 is inclined to the other side in the circumferential direction by a predetermined angle θ2 By applying a rotational moment in the same direction as the rotational direction of the electric motor 12 to the plate 14 acting on it, the rotational speed in the reverse direction (counterclockwise direction in FIG. 2) of the rotary disc 14 gradually decreases. It will stop soon. In this case, in order to further enhance the cleaning effect of the mesh 36, the regulator 57 is set so that the injection pressure of the second spray nozzle 46 becomes larger than the injection pressure of the first spray nozzle 45. It is preferable to make the inertia at the time of the rotation stop in the reverse direction larger.

  As described above, when the rotation of the rotating disk 14 in the reverse direction is stopped, the solenoid valves 51 and 55 are controlled to open and close by the command from the control circuit unit 29, and the mesh 36 from the first spray nozzle 45 and the second spray nozzle 46. The injection of the cleaning solution to the nozzle is stopped, and the first cleaning cycle by the spray cleaner 16 ends.

  After the completion of the first cleaning cycle, when a predetermined time has elapsed, the second cleaning cycle is performed in the same manner as the first cleaning cycle according to a command from the control circuit unit 29, and this cleaning cycle is repeated three times in total. , A series of cleaning operations of the mesh 36 by the spray cleaner 16 are completed.

  Although the washing cycle is repeated three times in the series of washing operations of the mesh 36 by the spray washing device 16 described above, the maximum number of repetitions of this washing cycle is the property of oil mist (oiliness or water solubility) or washing liquid Default data such as injection pressure and injection time, data (type, length L, inner diameter D, etc.) about the input connection pipe 68, and differential pressure measurement value of the mesh 36 immediately before cleaning measured by the differential pressure gauge 71 Based on the degree of clogging of the mesh 36 determined by the control circuit unit 29, the number of reverse rotations of the rotary disk 14 causes the cleaning solution droplets generated by the reverse rotation of the rotary disk 14 to reach the mist generation source 67. Is determined by computing.

  For example, when the differential pressure of the mesh 36 immediately before cleaning is 500 Pa, the type of the connecting pipe 68 is a flexible hose made of polyvinyl chloride, and the length L of the connecting pipe 68 (see FIG. 5) is 5 m, the calculation of the control circuit unit 29 Thus, it is determined that the droplets of the cleaning solution do not reach the mist generation source 67 until the reverse rotation number of the rotary disk 14 is 8 to 10 rotations. In this case, for example, the rotary disk 14 rotates in reverse in the first cleaning cycle four times, rotates in the second cleaning cycle three times, and in the third cleaning cycle twice. When the rotation speed detection means 23 detects that the reverse rotation number of the rotary disk 14 is nine in a total of three washing cycles, the control circuit unit 29 detects the third washing cycle. The series of cleaning operations of the mesh 36 by the spray cleaner 16 are ended.

  Thus, the control circuit unit 29 controls the reverse rotation number of the rotary disc 14 so that the arrival distance F (see FIG. 5) of the spray of the cleaning liquid becomes shorter than the length L (see FIG. 5) of the connection pipe 68. By doing this, it is possible to prevent the droplets of the cleaning solution from reaching the mist generation source 67.

  Further, according to the oil mist removing device 10 according to the above-described embodiment, the spray cleaner 16 sprays the cleaning fluid from the other direction with the first spray nozzle 45 which sprays the cleaning fluid from one direction inclined to the mesh 36. Since the second spray nozzle 46 is provided, a part of the mesh 36 does not become blind during cleaning, and the mesh 36 can be cleaned to every corner. Therefore, the sticking component and the dust component adhering to the mesh 36 can be reliably removed, and the oil mist can be stably and reliably collected and separated and removed. Further, when the mesh 36 is cleaned, the rotating disc 14 can be rotated by injecting the cleaning solution, and motor power is not required, so that economic efficiency can be improved.

  Further, since the oil mist removing device 10 according to the above-described embodiment includes the rotation direction detecting means 22 for detecting the rotation direction of the electric motor 12 or the rotating disc 14, the electric motor 12 or the rotating disc 14 When stopped, the cleaning operation by the second spray nozzle 46 can be accurately stopped. Therefore, since the rotary disk 14 does not rotate in the forward direction when the mesh 36 is cleaned by the spray cleaner 16, the droplets of the cleaning solution mixed with dirt scatter from the exhaust port 59 to the outside of the oil mist removing device 10. Can be prevented.

  In the example of a series of cleaning operations of the mesh 36 by the spray cleaner 16 of the oil mist removing apparatus 10 according to the embodiment of the present invention described above, the spraying time of the cleaning fluid by the first spray nozzle 45 is preset. However, the control circuit unit 29 may variably control in accordance with the differential pressure measurement value of the mesh 36 immediately before the cleaning operation by the differential pressure gauge 71.

  In addition, although the second cleaning cycle is set to start after a predetermined time has elapsed after the first cleaning cycle is completed, the second cleaning cycle may be started immediately after the first cleaning cycle is completed. Each cleaning cycle may be performed continuously.

  Furthermore, for example, when an exhaust connection pipe is separately connected to the exhaust port 59, there is no problem even if droplets of cleaning liquid generated during forward rotation of the rotary disc 14 splash from the exhaust port 59 to the outside of the oil mist removing device 10. In this case, as in the time chart shown in FIG. 8, the second spray nozzle 46 is also operated after the rotating disk 14 rotating in the reverse direction by the cleaning operation of the first spray nozzle 45 starts rotating in the forward direction. It is also possible to control so that the cleaning operation by the above can be performed continuously. In this case, the dirt attached to the mesh 36 can be removed more effectively.

  Furthermore, although tap water is used as the cleaning liquid in the embodiment of the present invention described above, the cleaning liquid may be detergent-containing water or water, steam, alkaline electrolyzed water, etc. other than tap water.

  The technology of the present invention can be used in an oil mist removing device that collects oil mist from oil containing dust (oil smoke) containing oil mist generated from a processing machine or the like in a factory and separates and removes the oil mist.

Reference Signs List 10 oil mist removing device 11 output shaft 12 electric motor 14 rotating disc 16 spray washer 22 rotation direction detecting means 29 control circuit unit (control means)
36 mesh 45 first spray nozzle 46 second spray nozzle 67 source 68 connection pipe 71 differential pressure gauge (differential pressure detection means)

Claims (12)

An oil mist removing device for separating and removing oil mist in dust-containing air, comprising:
A rotatable disc provided rotatably;
A mesh that is provided on the rotating disk and collects oil mist when the air flow collides;
And a spray cleaner for performing a cleaning operation for injecting a cleaning solution,
The spray cleaner is
A first spray nozzle that generates a moment that causes the rotating disk to rotate in one direction by injecting the cleaning solution from one direction inclined to the mesh;
A second spray nozzle that generates a moment that causes the rotating disk to rotate in the other direction by injecting the cleaning solution from the other direction inclined to the mesh;
An oil mist removing device characterized by comprising: Motor,
A suction fan that forms an air flow by driving the motor;
The oil mist removing device according to claim 1, further comprising: The motor has an output shaft formed in the upstream and downstream directions,
The oil mist removing device according to claim 2, wherein the suction fan is fixed to an output shaft of the motor, and generates an air flow directed downstream by driving the motor.   The oil mist removing device according to any one of claims 2 to 3, wherein the spray cleaner performs a cleaning operation for injecting the cleaning solution when the motor is not driven.   The oil mist removing device according to any one of claims 1 to 4, wherein the spray cleaner is disposed apart from the rotating disc.   The oil mist removing device according to claim 5, wherein the spray cleaner is disposed downstream of the rotating disc.   The oil mist removing device according to any one of claims 1 to 6, wherein the mesh collects oil mist when the air flow directed downstream collides.   The oil mist removing device according to any one of claims 1 to 7, wherein a cleaning cycle in which the cleaning operation by the second spray nozzle is performed after the cleaning operation by the first spray nozzle is repeated.   9. The oil mist removal method according to claim 8, wherein the cleaning operation by the second spray nozzle is performed until the rotating disk rotating in the opposite direction is stopped by the cleaning operation of the first spray nozzle. apparatus.   The motor or the rotational direction detecting means for detecting the rotational direction of the rotating disc is provided, and the cleaning operation by the second spray nozzle is stopped when the rotational direction detecting means detects that the motor or the rotating disc has stopped. The oil mist removing device according to claim 9, characterized in that:   The cleaning operation by the second spray nozzle is continued even after the rotating disc rotating in the reverse direction starts to rotate in the forward direction by the cleaning operation of the first spray nozzle. The oil mist removal apparatus as described in 8. A connecting pipe for guiding dust-containing air from a source;
Differential pressure detection means for detecting a differential pressure between the upstream side and the downstream side of the air flow direction of the mesh;
Control means for controlling the number of rotations of the rotating disc in the reverse direction based on the data on the connection pipe and the detection result of the differential pressure detection means;
The oil mist removal apparatus according to any one of claims 8 to 11, further comprising:

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