JP2016019946A - Oil mist removing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stably and surely collect and separate and remove the oil mist attached to a mesh.SOLUTION: The invention comprises: a motor formed with an output shaft 11 in the vertical direction; a suction fan fixed to the output shaft 11 of the motor and forming an air flow going upward; a rotating disc 14 fixed to the output shaft 11 of the motor and provided to be rotatable in a normal direction; a mesh 36 provided on the rotating disc 14 and colliding with the air flow going upward to collect oil mist; and a spray washer 16 arranged above the rotating disc 14 and performing washing operation of injecting washing liquid during non-driving of the motor. The spray washer 16 comprises first spray nozzles 45 which generate a moment for rotating the rotating disc 14 in the opposite direction by injecting the washing liquid from one direction inclined to the mesh 36, and second spray nozzles 46 which generate a moment for rotating the rotating disc 14 in the normal direction by injecting the washing liquid from the other direction inclined to the mesh 36.SELECTED DRAWING: Figure 2

Description

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

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

  As a conventional oil mist removing device, for example, as shown in FIG. 9, a rotating disk 1 that is rotated by an electric motor and an airflow that is provided near the outer periphery of the rotating disk 1 and flows up and down. A mesh 2 that exerts a collision action and an upper spray cleaner 3 that is provided at a predetermined angle θ with respect to the mesh 2 at one location above the rotating disk 1 are known. In this type of oil mist removing apparatus, while the electric motor is stopped, the upper spray cleaner 3 sprays the cleaning liquid from one direction inclined with respect to the mesh 2 so that the oil mist adhered to the mesh 2 The adhering component and the dust component are washed (see Patent Document 1).

JP 2012-55839 A

  However, the oil mist removing apparatus described in Patent Document 1 described above is configured to inject the cleaning liquid from one direction inclined with respect to the mesh 2 by the upper spray cleaner 3 provided in one place. Therefore, a part of the mesh (hatched portion in FIG. 9) becomes a blind spot and cannot 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 sticking components and dust components adhering to the mesh 2, and there is a problem that it is difficult to stably collect and separate and remove oil mist.

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

  The first oil mist removing apparatus of the present invention includes a motor having an output shaft formed in the vertical direction, a suction fan fixed to the output shaft of the motor and forming an airflow directed upward by driving of the motor, A rotating disk fixed to the output shaft of the motor and provided to be rotatable in the forward direction by driving the motor, and an oil mist collected by collision of the upward airflow provided on the rotating disk. A mesh and a spray cleaner disposed above the rotating disk and performing a cleaning operation of spraying a cleaning liquid when the motor is not driven, the spray cleaner being inclined in one direction with respect to the mesh A first spray nozzle that generates a moment for rotating the rotating disk in a reverse direction by spraying the cleaning liquid from the nozzle and a cleaning liquid from another direction inclined with respect to the mesh. In which it characterized in that it comprises a second spray nozzle for generating a moment for rotating the rotary disc in a forward direction.

  According to the first oil mist removing apparatus of the present invention described above, the spray sprayer includes the first spray nozzle that ejects the cleaning liquid from one direction inclined with respect to the mesh and the second spray nozzle that ejects the cleaning liquid from the other direction. Since it is provided, the entire mesh can be washed to every corner. Further, when the mesh is cleaned, the rotating disk can be rotated by spraying the cleaning liquid, and no motor power is required, so that the economy can be improved.

  The second oil mist removing apparatus of 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 completed is repeated.

  According to the second oil mist removing apparatus of the present invention described above, since the operation of changing the rotational speed of the rotating disk can be repeated, the washing disk cleaning effect and the inertia of the rotating disk are achieved. As a result, the dirt can be washed off, and the dirt adhering to the mesh can be effectively removed.

  In the third oil mist removing apparatus of the present invention, the cleaning operation by the second spray nozzle is performed until the rotating disk rotating in the reverse direction is stopped by the cleaning operation of the first spray nozzle. It is characterized by that.

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

  In addition, a fourth oil mist removing apparatus of the present invention includes a rotation direction detecting means for detecting a rotation direction of the motor or the rotating disk, and the rotation direction detecting means that the motor or the rotating disk has stopped. When this is detected, the cleaning operation by the second spray nozzle is stopped.

  According to the fourth oil mist removing apparatus of the present invention described above, 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 stops. it can. Accordingly, since the rotating disk does not rotate in the forward direction when the mesh is cleaned by the spray cleaner, the splash of cleaning liquid generated by the rotation of the rotating disk in the forward direction is scattered from the opening to the outside of the oil mist removing device. Can be prevented.

  Further, in the fifth oil mist removing apparatus of the present invention, the rotating disk rotating in the reverse direction by the cleaning operation of the first spray nozzle is rotated in the forward direction by the cleaning operation by the second spray nozzle. It is characterized by being continued even after it has started.

  According to the fifth oil mist removing apparatus of the present invention described above, the dirt adhering to the mesh 36 can be more effectively removed.

  The sixth oil mist removing apparatus of the present invention includes a connecting pipe that guides dust-containing air from a generation source, a differential pressure detecting unit that detects a differential pressure between the upstream side and the downstream side in the air flow direction of the mesh, And control means for controlling the number of rotations of the rotating disk in the reverse direction based on the data relating to the connecting pipe and the detection result of the differential pressure detecting means.

  According to the above-described sixth oil mist removing apparatus of the present invention, since the splash of the cleaning liquid generated by the reverse rotation of the rotating disk does not enter the inside of the generation source, rust is generated at the generation source. Adverse effects can be prevented.

  The present invention is capable of stably and surely collecting and separating and removing oil mist adhering components and dust components adhering to the mesh, and can improve the cleaning effect of the mesh. You can get.

It is a longitudinal cross-sectional view which shows the oil mist removal apparatus which concerns on embodiment of this invention. It is a plane sectional view showing an oil mist removing device concerning an embodiment of the invention. In the oil mist removing apparatus according to the embodiment of the present invention, (A) is an enlarged side view showing the first spray nozzle viewed from the arrow X in FIG. 2, and (B) is viewed from the arrow Y in FIG. It is an enlarged side view which shows a 2nd spray nozzle. It is a schematic diagram which shows the spray washing device 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 which shows the control unit of the oil mist removal apparatus which concerns on embodiment of this invention. 5 is a time chart showing an example of cleaning timing in the oil mist removing apparatus according to the embodiment of the present invention. It is a time chart which shows another example of a cleaning timing in the oil mist removal apparatus which concerns on embodiment of this invention. It is an enlarged side view which shows the upper side spray washing device of the conventional oil mist removal apparatus.

  Hereinafter, an oil mist removing apparatus according to an embodiment of the present invention will be described in detail with reference to the drawings. The following embodiment is a preferred example of the present invention, and may have various technically preferable limitations. However, the technical scope of the present invention is not particularly limited to the description of the present invention. As long as it is not limited to these embodiments.

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

  In the electric motor 12, the lower end of the motor body 20 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 with the output shaft 11 as the center, and an upper end portion of the inner cylinder 24 is formed in a conical shape so as to have a small diameter upward. The lower end of the inner cylinder 24 is supported on the bottom surface 25 of the casing 18, and the bottom surface 25 is supported on 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 disc-shaped rectifying plate 28 having a plurality of rectifying holes 27, and the outer peripheral edge of the rectifying plate 28 is supported on the inner surface of the casing 18. Thereby, 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 disk 32 having an intake opening, an upper disk 33 provided to face the lower disk 32, and a plurality of fins provided between the upper disk 33 and the lower disk 32. 34. The output shaft 11 penetrates vertically in 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, whereby the suction fan 13 is fixed to the output shaft 11. . The plurality of fins 34 are respectively curved and formed so as to guide the airflow sucked from the intake opening toward the outer peripheral direction according to the rotation direction of the suction fan 13. Thus, the suction fan 13 can suck the dust-containing airflow including oil mist from the suction port 19 by guiding the airflow from the center side to the outer peripheral side to make the cyclone portion 30 have a negative pressure.

  The rotating disk 14 is fixed to the lower part of the output shaft 11 via a disk mounting flange 35 and is rotatable in the forward direction (clockwise direction in FIG. 2) when the electric motor 12 is driven. On the outer peripheral portion of the rotating disk 14, fan-shaped meshes 36 are provided at a plurality of locations (eight locations in the present embodiment) at predetermined intervals along the circumferential direction. The mesh 36 is formed of, for example, a mesh having a large number of fine voids, and more preferably is configured by fixing a large number of wires such as thin wires in parallel in a radial manner. Thereby, oil mist etc. which collide with the rotating disk 14 by rotation of the electric motor 12 can be made easy to blow off in the outer peripheral direction. The mesh 36 may directly form a large number of small holes in the rotating disk 14, and 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 rectifying unit 15 is fixed to a support disc 37 through which the output shaft 11 passes, and the support disc 37 has a flow hole 38 centering on the output shaft 11. It is supported on the inner surface. The rectifying unit 15 includes a substantially cylindrical fixed blade body 40 fixed to the lower side of the support disk 37 and a substantially cylindrical tube body 41 fixed to the upper side of the support disk 37, and is fixed. The blade body 40 and the tubular body 41 communicate with each other through the circulation hole 38. The fixed blade body 40 includes a fixed disk 42 formed to face the flow hole 38 of the support disk 37, 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 body 40 so as to communicate with the guide blades 43. By configuring the rectifying unit 15 in this manner, the airflow that has passed 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 that penetrate the support disk 37 above the outer periphery of the rotating disk 14. A water supply facility 48 for supplying water from a tap water supply source 47 to the first spray nozzle 45 and the second spray nozzle 46 is provided.

  Each of the first spray nozzle 45 and the second spray nozzle 46 has an elbow shape whose tip is directed downward, and has a central angle of 90 degrees with respect to the output shaft 11 in plan view as shown in FIG. Two are arranged alternately along the circumferential direction. 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.

  As shown in FIG. 3A, the first spray nozzle 45 is disposed in a posture inclined at a predetermined angle θ1 on one side in the circumferential direction with respect to the vertical direction. Thus, the first spray nozzle 45 injects the cleaning liquid from one direction inclined in the circumferential direction with respect to the mesh 36, thereby causing the rotating disk 14 to move in the direction opposite to the rotating direction when the electric motor 12 is driven (in FIG. 2). A moment to rotate in the counterclockwise direction) can be generated.

  As shown in FIG. 3B, the second spray nozzle 46 is inclined at a predetermined angle θ2 toward the other circumferential side opposite to the inclination direction of the first spray nozzle 45 with respect to the vertical direction. Has been placed. Thereby, the second spray nozzle 46 injects the cleaning liquid from the other direction inclined in the circumferential direction opposite to the one direction with respect to the mesh 36, thereby rotating the rotating disk 14 in the rotation direction when the electric motor 12 is driven. Can be generated in the same direction (clockwise direction in FIG. 2).

  The number and arrangement of the first spray nozzles 45 and the second spray nozzles 46 are not limited to those described above. For example, one each of the first spray nozzle 45 and the second spray nozzle 46 is output. You may install so that a center angle may form 180 degree | times in the position which opposes on both sides of the axis | shaft 11, or you may make the installation number of the 1st spray nozzle 45 and the 2nd spray nozzle 46 different. Further, 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 angle or different angles.

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

  The electromagnetic valve 51 may be a two-way electromagnetic 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. A three-way solenoid valve may be used. 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 electromagnetic 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. Further, a regulator 57 and a flow meter 58 are connected to the first branch water supply pipe 53 and the second branch water supply pipe 54 in order from the solenoid valve 51 side. The regulator 57 has a function of adjusting the water supply pressure, the flow meter 58 has a function of measuring the water supply amount, and the control circuit unit 29 monitors the value of the flow meter 58 while monitoring the first spray nozzle 45 and the first spray water. The regulator 57 is controlled so that the spray pressure from the two spray nozzles 46 becomes an appropriate value. Note that 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 adjustment of the water pressure is unnecessary.

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

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

  The exhaust muffler 63 is configured by a wire net-like substantially cylindrical body in which an exhaust port 59 is formed in the central portion, and is provided with a large number of small-diameter openings formed of punching metal or the like. As a result, the flow of exhaust can be dispersed and rectified, and the wind noise caused by the airflow during exhaust passes along with the airflow at the small-diameter opening, but is reflected outside the small-diameter opening. The cancellation effect is generated and a sound reduction effect can be achieved. 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 suction port 19 is located 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, at an offset position not intersecting with the vertical central axis. So that dust-containing air can be sucked into the cyclone portion 30. An oil drain port 66 is formed in the lower part of the lower half portion 18 a of the casing 18, and a part of the oil drain port 66 is lower than the upper surface of the bottom plate 25 of the casing 18.

  As shown in FIG. 5, a connection pipe 68 that guides dust-containing air from a mist generation source 67 such as a processing machine in a factory is connected to the suction port 19, and the connection pipe 68 is a pipe or a duct or the like. It is formed by. The oil mist in the dust-containing air generated from the mist generating source 67 includes not only the oil mist itself, but also a fixed component mainly composed of dust containing the oil mist, and fine abrasive powder and cutting powder to which the oil mist adheres. Dust components mainly containing dust are included.

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

  The rotation direction detection means 22 detects the rotation direction of the electric motor 12 or the rotating disk 14 in order to determine the spraying time of the cleaning liquid by the second spray nozzle 46. For example, the rotation direction detection means 22 detects by a sensor, Detecting by the back electromotive force of the electric motor 12 or using the electric motor 12 having a function of outputting the rotation direction is included. Further, the rotational speed detection means 23 includes a device that detects the rotational speed of the electric motor 12 or the rotating disk 12 by a sensor such as an encoder. Further, the differential pressure gauge 71 is for detecting the differential pressure between the upstream side and the downstream side in the air flow direction of the mesh 36 and outputting the clogged state of the mesh 36.

  The control circuit unit 29 includes setting input means 73 for inputting data such as the type, length L and inner diameter D (see FIG. 5) of the connecting pipe 68 and the cleaning time and stop time of the spray cleaner 16. , A display means 74 for displaying data input to the setting input means 73, an operation switch 75 for starting or stopping the oil mist removing device 10, and an external connected to the control device 76 of the mist generating source 67. And a communication unit 77.

  In the oil mist removing apparatus 10 having the above-described configuration, as shown by an arrow in FIG. 1, the oil mist guided 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 swirls by the centrifugal action in the cyclone portion 30, and cutting powder having a relatively large particle diameter in the dust-containing air is aggregated along the inner surface of the lower half portion 18 a of the casing 18 to form the bottom plate 25. And is discharged to the outside through the oil discharge port 66.

  Thereafter, the dust-containing air in the cyclone section 30 rises while swirling between the casing 18 and the inner cylinder 24, is rectified by the rectifying 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 blown off to the outer periphery, and the oil mist bounced off falls to the bottom plate 25 and is discharged to the outside through the oil discharge port 66.

  The air that has passed through the mesh 36 and has been cleaned by removing the oil mist is uniformly rectified in the rectification unit 15 and guided to the suction fan 13, and is rectified and diffused in the exhaust muffler 63 to reduce noise. Then, the air is discharged from the exhaust port 59 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.

  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 rotating disk 14 is moved in the forward direction (clockwise direction in FIG. 2) as the electric motor 12 is driven. Rotate to. At this time, the spray cleaner 16 is stopped, and no cleaning liquid is ejected from the first spray nozzle 45 and the second spray nozzle 46.

  Then, when the operation of the oil mist removing apparatus 10 is stopped by, for example, pressing the operation switch 75 of the control circuit unit 29 again, the rotating disk 14 is stopped as the electric motor 12 is stopped. When a predetermined time elapses after the rotating disk 14 is stopped, the solenoid valves 51 and 55 are controlled to be opened and closed by a command from the control circuit unit 29, and the main water supply pipe 52 and the first branch water supply are supplied from the tap water supply source 47. Water is supplied to the first spray nozzle 45 through the pipe 53, and water as 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 injects the cleaning liquid onto the mesh 36 in a state where the first spray nozzle 45 is inclined at a predetermined angle θ1 toward one side in the circumferential direction with respect to the vertical direction. A rotational moment in the direction opposite to the rotational direction when the electric motor 12 is driven acts on the plate 14, and the rotating disc 14 rotates in the reverse direction (counterclockwise direction in FIG. 2).

  In this way, when a predetermined time elapses after the cleaning liquid starts to be sprayed from the first spray nozzle 45, the solenoid valve 51 is controlled to be opened and closed by a command from the control circuit unit 29, and the tap water supply source 47. Then, water is supplied to the second spray nozzle 46 through the main water supply pipe 52 and the second branch water supply pipe 54. Thereby, the spray of the cleaning liquid from the first spray nozzle 45 to the mesh 36 is stopped, and the spray 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 injects the cleaning liquid onto the mesh 36 in a state where the second spray nozzle 46 is inclined at a predetermined angle θ2 to the other circumferential side with respect to the vertical direction. When a rotational moment in the same direction as the rotational direction when the electric motor 12 is driven acts on the plate 14, the rotational speed of the rotating disk 14 in the reverse direction (counterclockwise direction in FIG. 2) gradually decreases. Stop before long. In this case, in order to further improve the cleaning effect of the mesh 36, the regulator 57 is set so that the spray pressure of the second spray nozzle 46 is larger than the spray pressure of the first spray nozzle 45, and the rotating disk 14 It is preferable that the inertia when the rotation in the reverse direction is stopped is increased.

  When the rotation of the rotating disk 14 in the reverse direction is stopped as described above, the solenoid valves 51 and 55 are controlled to be opened and closed by a command from the control circuit unit 29, and the mesh 36 from the first spray nozzle 45 and the second spray nozzle 46 is controlled. The spraying of the cleaning liquid on is stopped, and the first cleaning cycle by the spray cleaner 16 is completed.

  When a predetermined time has elapsed after the end of the first cleaning cycle, a second cleaning cycle is performed in the same manner as the first cleaning cycle in response 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 is completed.

  In the series of cleaning operations of the mesh 36 by the spray cleaner 16 described above, the cleaning cycle is repeated three times. The maximum number of times this cleaning cycle is repeated depends on the properties of the oil mist (oil or water solubility) and the cleaning liquid. Default pressure data such as injection pressure and injection time, input data relating to the connecting pipe 68 (type, length L, inner diameter D, etc.), 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 control circuit unit 29 determines how many times the rotating disk 14 rotates reversely and the splash of cleaning liquid generated by the reverse rotation of the rotating disk 14 reaches the mist generating source 67. Is determined by computing.

  For example, when the differential pressure of the mesh 36 just before cleaning is 500 Pa, the type of the connecting pipe 68 is a flexible hose made of PVC, and the length L (see FIG. 5) of the connecting pipe 68 is 5 m, the calculation of the control circuit unit 29 is performed. Accordingly, it is determined that the spray of the cleaning liquid does not reach the mist generation source 67 until the reverse rotation number of the rotating disk 14 is 8 to 10 rotations. In this case, for example, the rotating disk 14 rotates in reverse four times in the first cleaning cycle, reversely rotates three times in the second cleaning cycle, and reversely rotates twice in the third cleaning cycle. When the rotation number detecting means 23 detects that the reverse rotation number of the rotating disk 14 in the total of three cleaning cycles is nine, the control circuit unit 29 is ready when the third cleaning cycle is completed. Then, a series of cleaning operations of the mesh 36 by the spray cleaner 16 is terminated.

  In this way, the control circuit unit 29 controls the reverse rotation speed of the rotating disk 14 so that the cleaning liquid splash reach F (see FIG. 5) is shorter than the length L (see FIG. 5) of the connecting pipe 68. By doing so, it is possible to prevent the spray of the cleaning liquid from reaching the mist generation source 67.

  Further, according to the oil mist removing apparatus 10 according to the above-described embodiment, the spray cleaner 16 sprays the cleaning liquid from one direction inclined with respect to the mesh 36 and the first spray nozzle 45 that sprays the cleaning liquid from the other direction. Since the second spray nozzle 46 is provided, a portion of the mesh 36 does not become a blind spot during cleaning, and the mesh 36 can be cleaned to every corner. Therefore, it is possible to reliably remove the adhering component and dust component adhering to the mesh 36, and it is possible to stably and reliably collect and separate and remove the oil mist. Further, when the mesh 36 is cleaned, the rotating disk 14 can be rotated by spraying the cleaning liquid, and motor power is not required, so that the economy can be improved.

  Moreover, since the oil mist removal apparatus 10 which concerns on above-described embodiment is provided with the rotation direction detection means 22 which detects the rotation direction of the electric motor 12 or the rotation disc 14, the electric motor 12 or the rotation disc 14 is provided. At the time of stopping, the cleaning operation by the second spray nozzle 46 can be stopped accurately. Accordingly, since the rotating disk 14 does not rotate in the forward direction when the mesh 36 is cleaned by the spray cleaner 16, splashes of cleaning liquid mixed with dirt are scattered from the exhaust port 59 to the outside of the oil mist removing apparatus 10. Can be prevented.

  In the above-described series of cleaning operation examples of the mesh 36 by the spray cleaner 16 of the oil mist removing apparatus 10 according to the embodiment of the present invention, the spraying time of the cleaning liquid by the first spray nozzle 45 is set in advance. However, the control circuit unit 29 may be variably controlled according to the differential pressure measurement value of the mesh 36 immediately before the cleaning operation by the differential pressure gauge 71.

  In addition, the second cleaning cycle is set to start after a lapse of a predetermined time after the end of the first cleaning cycle, but the second cleaning cycle is started immediately after the end of the first cleaning cycle. In addition, each cleaning cycle may be performed continuously.

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

  Furthermore, in the above-described embodiment of the present invention, tap water is used as the cleaning liquid. However, the cleaning liquid may be tap water, hot water containing detergent, water, steam, alkaline electrolyzed water, or the like.

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

DESCRIPTION OF SYMBOLS 10 Oil mist removal apparatus 11 Output shaft 12 Electric motor 14 Rotating disc 16 Spray cleaner 22 Rotation direction detection 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 (6)

An oil mist removing device for separating and removing oil mist in dusty air,
A motor with an output shaft formed in the vertical direction;
A suction fan which is fixed to the output shaft of the motor and forms an upward airflow by driving the motor;
A rotating disk fixed to the output shaft of the motor and provided to be rotatable in the forward direction by driving the motor;
A mesh that is provided on the rotating disk and collects oil mist by colliding with the upward airflow;
A spray cleaner disposed above the rotating disk and performing a cleaning operation of spraying a cleaning liquid when the motor is not driven;
With
The spray cleaner
A first spray nozzle that generates a moment for rotating the rotating disk in a reverse direction by spraying a cleaning liquid from one direction inclined with respect to the mesh;
A second spray nozzle that generates a moment for rotating the rotating disk in a positive direction by spraying a cleaning liquid from another direction inclined with respect to the mesh;
An oil mist removing device comprising:   2. The oil mist removing apparatus according to claim 1, wherein a cleaning cycle in which a cleaning operation by the second spray nozzle is performed is repeated after completion of the cleaning operation by the first spray nozzle.   The oil mist removal according to claim 2, wherein the cleaning operation by the second spray nozzle is performed until the rotating disk rotating in the reverse direction is stopped by the cleaning operation of the first spray nozzle. apparatus.   Rotating direction detecting means for detecting the rotating direction of the motor or the rotating disk is provided, and the cleaning operation by the second spray nozzle is stopped when the rotating direction detecting means detects that the motor or the rotating disk has stopped. The oil mist removing apparatus according to claim 3, wherein   The cleaning operation by the second spray nozzle is continued even after the rotating disk rotating in the reverse direction by the cleaning operation of the first spray nozzle starts to rotate in the forward direction. 2. The oil mist removing apparatus according to 2. A connecting pipe for guiding dust-containing air from the source;
A differential pressure detecting means for detecting a differential pressure between the upstream side and the downstream side in the air flow direction of the mesh;
Control means for controlling the number of rotations of the rotating disk in the reverse direction based on the data relating to the connecting pipe and the detection result of the differential pressure detecting means;
The oil mist removing device according to any one of claims 2 to 5, wherein the oil mist removing device is provided.

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