JP4415314B2 - Oil mist collection filter - Google Patents

Description

  The present invention relates to an oil mist collecting filter that can collect oil mist contained in air or the like, and is particularly characterized in that oil mist collecting efficiency is improved and clogging is difficult.

  Two or more partition plates in which a large number of air holes are formed are arranged in a line in the front-rear direction, and a filter assembly in which sheet-like filter elements are arranged between the partition plates is provided in the filter element. There is an oil mist collection filter in which the flow path of oil mist and the like is increased to improve the collection effect of the filter element (see Patent Document 1).

  There is also an oil mist collecting filter that arranges two partition plates formed with a large number of slits in a line in the front-rear direction and collects oil contained in the air by inertial collision (Patent Document 2). reference).

JP 2002-166117 A JP-A-6-337142

  In the oil mist collecting filter described in Patent Document 1, a vent hole of the partition plate is present on a vertical line passing through the position of the oil particle that has been dropped and adhered to the partition plate, thereby preventing the oil particle from flowing down. A phenomenon occurs, and this phenomenon reduces the oil mist recovery rate.

  Moreover, in patent document 1, a spacer bears the role which lengthens a flow path | route, and accommodation of oil mist is based on the effect | action of a filter element exclusively. Thus, in patent document 1, oil mist accumulates in a filter element and it is easy to clog.

  On the other hand, in the oil mist collection filter described in Patent Document 2, the filter element is not used, so that the problem of clogging does not occur, but the oil mist collection efficiency does not increase compared to the filter element. is there.

  Under such circumstances, the invention can improve the oil mist collection efficiency, and can smoothly drop the oil particles that have been deposited and adhere to the partition plate to prevent clogging of the filter element. An object is to provide a mist collecting filter.

  According to a third aspect of the present invention, in the plurality of partition plates, the total ventilation area obtained by combining the effective opening areas of the slits in the partition plates for each sheet is later than that of the front partition plate. The partition plate on the side is made smaller so that the gas phase fluid to be treated flows through the filter assembly from the front side to the rear side thereof.

  Further, as described in claim 2, the slit is opened at the lower end of the partition plate on which the slit is formed, so that the portion between the slits of the partition plate is comb-like. To do.

  Further, according to claim 3, in the plurality of filter elements forming the filter aggregate, each filter element has an opening of the filter element on the rear side of that of the filter element on the front side. The gas-phase fluid to be processed flows through the filter assembly from the front side to the rear side thereof.

  According to a fourth aspect of the present invention, the partition plate is made of a hard material such as metal or plastic, and the filter element is made of a soft elastic material.

  According to a fifth aspect of the present invention, the sheet-like filter element is in close contact with the front surface portion and / or the rear surface portion of the filter assembly.

According to the present invention, the following effects can be obtained.
That is, according to the first aspect of the present invention, the portion between the slits of each partition plate becomes a planar portion continuous over the entire length in the vertical direction of the partition plate, so that it drops into the filter element and adheres to the partition plate. There is no slit on the vertical line passing through the position of the oil particles, and the oil particles adhering to each partition plate flow smoothly and accurately without being blocked by the slit, and the self-cleaning action of the partition plate and filter element works smoothly. In addition, the clogging of the filter element due to oil particles is suppressed, and the flow rate is increased each time the gas phase fluid to be processed passes through each partition plate. Increase the inertial collision collection capacity of the rear side partition plate more than those on the front side, and disperse the collection of oil particles from the partition plate and each filter element throughout the filter assembly Since the self-cleaning action of each partition plate and each filter element is increased, the progress of clogging of each filter element can be suppressed, and the continuous use time of each filter element can be prolonged. .

  According to the second aspect of the present invention, the path on the front surface of the slit through which the oil droplets are transferred can be linearly formed downward.

  According to the third aspect of the present invention, every time the gas phase fluid to be processed passes through each filter element, the oil particles in the gas phase fluid to be processed that can collide with each filter element are successively reduced. Thus, the filter element on the rear side increases the inertial collision collecting ability of the oil particles, and therefore the oil particles collected by the plurality of filter elements correspond to the corresponding filter elements for each size of the particle size. The oil particles and the like in the gas phase fluid to be treated are dispersed and collected in all the filter elements to improve the collection efficiency as a whole. The progress of clogging is further suppressed, and the continuous use time of the filter element is further prolonged.

  According to the fourth aspect of the present invention, since the partition plate is formed of a hard material, when the partition plate is washed, a strong cleaning power is applied to the partition plate without fear of the deformation, and oil adhered to the partition plate Dust can be easily and quickly washed out, and when the filter assembly is stored in a box-shaped body casing, etc., the filter assembly can be stored in a compact form by utilizing the elasticity of the filter element. It will not occur.

  According to the fifth aspect of the present invention, the oil mist collecting ability of the entire filter can be easily increased by the filter element that is in close contact with the front surface of the filter assembly, and the filter element is in close contact with the rear surface of the filter assembly. The filtered filter element lowers the flow velocity of the gas phase fluid to be processed passing therethrough, and effectively prevents re-scattering of oil mist and dust collected by the filter element.

Embodiments of the present invention will be described below based on the drawings.
FIG. 1 is an assembly diagram of an oil mist collection filter of the present invention, FIG. 2 is an assembly diagram of a filter assembly that is a part of the oil mist collection filter, and FIG. 3 is a diagram showing a modification of the filter assembly, FIG. 4 is a diagram for explaining the operation of the filter assembly, and FIG. 5 is a diagram showing a use state of the filter assembly.

  The oil mist collecting filter according to the present invention is mounted, for example, in the middle of an exhaust path of air or the like in a sealed work work space of a machining center. As shown in FIG. 1, the oil mist collecting filter includes a box-shaped main body casing 1, a presser lid 2, and a filter assembly 3.

The main body casing 1 includes a vertical rectangular frame portion 7 formed by continuously connecting left and right side plates 4, 4, a lower surface plate 5 and an upper surface plate 6, and a rear surface a1 of the vertical rectangular frame portion 7 is opened. It has a rear edge 8a formed by bending the rear end edges of the left and right side plates 4, 4 and the rear end edge of the lower face plate 5 inward by 90 degrees, and the front surface a2 has a front edge on the entire periphery. An appropriate number of relatively large square holes b1, b2, b3 are formed with 8b remaining, and horizontal bars c1, c2 are formed between the square holes b1, b2, b3. The rear edge 6a is moved to the front side by the thickness of the pressing lid 2 from the rear end positions of the side plates 4, 4 and the lower surface plate 5.
The shape of the main casing 1 can be arbitrarily deformed, and can be, for example, a round shape or a triangular shape when viewed from the front.

  The presser lid 2 is a flat rectangular body, and is sized to match the rectangular frame portion 7 of the main casing 1. The appropriate number of comparisons is made with the edge 3 a around the entire periphery in the same manner as the front surface a <b> 2 of the main casing 1. Large square holes d1, d2, and d3 are formed, and horizontal beams e1 and e2 are formed between the square holes d1, d2, and d3. Positioned in a vertical orientation on the upper side of the back surface a1 and lowered to the arrow f1 while sliding one surface against the rear end of the upper surface plate 6, tightly between the left and right side plates 4 and 4 on the front side of the rear edge 8a. The lower end 3b is in close contact with the upper surface of the rear end portion of the lower surface plate 5 and covers the entire back surface of the main casing 1.

  As shown in FIG. 2, the filter assembly 3 has two or more partition plates 9a, 9b, 9c,... Formed with a plurality of slits g1, g2, g3 arranged in a line in the front-rear direction f2. The sheet-like filter elements 10a, 10b,... Are arranged respectively between adjacent ones of the partition plates 9a, 9b, 9c,... In this example, three partition plates 9a, 9b, 9c and two filter elements 10a and 10b.

  Each of the partition plates 9a, 9b, 9c is a square plate made of a metal material such as a steel plate or a plastic material, and a plurality of slits g1, g2, g3 are formed in a single row in the left-right direction f3 on the square plate, and The slits g1, g2, and g3 are formed as vertically long slits, and the vertical length of each slit is shorter than the total vertical length of the rectangular plate. The slits g1, g2, and g3 between the partition plates 9a, 9b, and 9c are arranged as follows, that is, between the partition plates 9a and 9b adjacent to each other in the front and back, or between 9b and 9c. The slits g1 and g2 of the front partition plates 9a and 9b and the slits g2 and g3 of the rear partition plates 9b and 9c do not overlap in the front-rear direction f2. In the illustrated example, the slits g1, g2, and g3 for each of the partition plates 9a, 9b, and 9c have the same shape and the same size, and are arranged in the left-right direction f3 at a specific constant pitch.

  At this time, the sizes of the slits g1, g2, and g3 are set so that the flow velocity of the gas phase fluid to be processed that passes through the slits is optimal for oil mist removal. In the illustrated example, each of the slits g1, g2, and g3 has the same size. Preferably, each of the three partition plates 9a, 9b, and 9c has a slit g1 in each of the partition plates 9a, 9b, and 9c. , G2, and g3, the total ventilation area is preferably reduced in order from the front side of the partition plates 9a, 9b, and 9c to the partition plates 9a, 9b, and 9c.

  Each of the filter elements 10a and 10b is a flexible rectangular plate formed of a sponge-like filter medium or a filter medium such as a nonwoven fabric in which fibers such as a synthetic resin material are randomly entangled. The front and rear filter elements 10a and 10b can be of different types. Specifically, for example, the size of the opening of the front filter element 10a is set to the rear filter element. For example, the front filter element 10a is made oleophilic and the rear filter element 10b is made oil-repellent.

  The filter assembly described above may be modified as follows, that is, as shown in FIG. 3, the slits g1, g2, and g3 for each of the partition plates 9a, 9b, and 9c are formed. By opening at the lower edges of the partition plates 9a, 9b, 9c, the slits g1, g2, g3 of the partition plates 9a, 9b, 9c are formed in a comb-like shape between the slits g1, g2, g3. Identical to the thing.

Next, usage examples and operations of the oil mist collecting filter according to the above embodiment will be described.
For example, the main body casing 1 is densely and detachably mounted in the middle of the exhaust path of the gas phase fluid to be processed in the sealed work space of the machining center, and a suction exhaust fan is provided on the outlet side of the exhaust path, By operating the fan, an exhaust system is formed in which the gas phase fluid to be processed in the enclosed work space flows in the exhaust path toward the outlet side thereof.
At this time, the main body casing 1 is in a state in which the front surface a2 is positioned on the upstream side in the flow direction of the gas phase fluid to be processed in the exhaust path and the back surface a1 is positioned on the downstream side.

  The to-be-processed gas phase fluid in the sealed work space is a mixture of air and oil mist, and the front surface of the vertically oriented rectangular frame portion 7 of the main casing 1 in the flow process in the exhaust path. First, it passes through the rectangular through holes b1, b2, b3 of a2, and first reaches the slit g1 of the partition plate 9a at the front position of the filter assembly 3, and each of the slits g1 reaches the gas phase to be treated. The fluid is accelerated by the squeezing action and flows into the filter element 10a at the front position as shown in FIG. Since the gas phase fluid to be treated thus flowed is arranged so that the slit g2 of the partition plate 9b at the intermediate position does not overlap the slit g1 of the partition plate 9a at the front position in the front-rear direction f2. And reaches the slit g2 of the partition plate 9b at the intermediate position.

  In the flow process of the gas phase fluid to be processed in the front filter element 10a, the speed of the fine oil particles of the oil mist contained in the gas phase fluid to be processed is increased in the filter medium of the filter element 10a. It is effectively removed by colliding and adhering, and the adhering fine oil particles grow gradually and drop together with the fine oil particles adhering to the subsequent, and are pushed to the back side through the filter medium, and eventually. As shown in FIG. 5, it adheres to the front surface of the slit portion h2 and the front surface of the left and right end portions of the partition plate 9b at the intermediate position, and when the deposit j accumulates and increases, the oil droplet becomes a heavy oil droplet. Due to the action, it flows down along the front surface of the slit portion h2 of the partition plate 9b at the intermediate position.

  Further, the gas phase fluid to be processed that has passed through the filter element 10a at the front position reaches the slit g2 of the partition plate 9b at the intermediate position, and each of the slits g2 in the illustrated example reaches the gas phase fluid to be processed that has reached this. The body is caused to flow into the filter element 10b at the rear position at a speed substantially equal to the speed in the filter element 10a at the front position. Since the gas phase fluid to be treated thus flowed is arranged so that the slit g3 of the partition plate 9c at the rear position does not overlap with the slit g2 of the partition plate 9b at the intermediate position in the front-rear direction f2. The filter element 10b reaches the slit g3 of the partition plate 9c at the rear position in accordance with the case in the filter element 10a at the front position.

  In the flow process of the gas phase fluid to be processed in the filter element 10b at the rear position, an action equivalent to that in the filter element 10a at the front position can be obtained, that is, included in the gas phase fluid to be processed. The fine oil particles of the oil mist to be applied are effectively removed by colliding and adhering to the filter medium of the filter element 10b at a high speed, and the adhering fine oil particles are combined with the fine oil particles adhering subsequently. Then, it gradually grows and drops to be pushed rearwardly through the filter medium, and eventually adheres to the front surface of the slit portion h3 of the partition plate 9c at the rear position. As the amount of adhesion increases, the oil drops become heavy. Flows down along the front surface of the slit portion h3 of the rear partition plate 9c by gravity.

Thus, the gas phase fluid to be treated that has reached the slit g3 of the partition plate 9c at the rear position is in a state where the oil mist has been effectively removed, and to the rear side of the filter assembly 3 through the slit g3 of the partition plate 9c. It flows out and further flows out downstream of the exhaust passage through the rectangular through holes d1, d2, and d3 of the presser lid 2.
Further, if oil particles adhere to the front surface of the partition plate 9a at the front position, it grows and becomes oil droplets and flows down along the front surface of the slit portion h1, and thus the partition at the front position. The oil droplets that have flowed down through the slits h1, h2, and h3 of the plate 9a, the partition plate 9b at the middle position, and the partition plate 9c at the rear position gather on the lower surface portion 5 of the square frame portion 7, and from here the pipe not shown It flows out of the exhaust path through a path.

  In the plurality of partition plates 9a, 9b, and 9c of the filter assembly 3, the total ventilation area that combines the effective opening areas of the slits g1, g2, and g3 in each of the partition plates 9a, 9b, and 9c is a partition that has a front position. If the size of the gas phase fluid is reduced in order from the plate 9a, the flow rate of the processed gas-phase fluid is increased each time it passes through the partition plates 9a, 9b, and 9c, and the partition plates 9a, 9b, and 9c and the filter elements 10a are increased. As for 10b, the inertial collision collection ability of the oil particles is increased as the rear side is increased.

  In addition, in the plurality of filter elements 10a and 10b of the filter assembly 3, if the openings are made smaller in order from the front filter element 10a, the gas phase fluid to be processed passes through the filter elements 10a and 10b. Further, the filter elements 10a and 10b are more likely to collide with finer oil particles, and the rear ones can increase the inertial impact collecting ability of the oil particles. The collected oil particles are dispersed and collected in the corresponding filter elements 10a and 10b for each size of the particle size, thereby suppressing the clogging of the filter elements 10a and 10b. The self-cleaning action and the continuous use time are prolonged.

  When the pressure drop accompanying the flow of the gas phase fluid to be treated in the filter assembly 3 becomes large during use of the oil mist collection filter, the oil mist collection filter is taken out from the exhaust path, and then The presser lid 2 is pulled out from the main casing 1 so as to be pulled up with respect to the main casing 1 in the direction of the arrow f1 in FIG. 1, and then the filter assembly 3 is opened on the back surface a1 of the main casing 1. The partition plates 9a, 9b, 9c and the filter elements 10a, 10b are cleaned by immersing them in a cleaning solution. At this time, since each partition plate 9a, 9b, 9c is formed of a hard material such as metal or plastic, even if it is strongly adhered oil or dust, it can be easily washed out quickly by applying a strong cleaning power. It can be done.

  The embodiment described above can be modified as follows, that is, either the front surface of the partition plate 9a at the front position of the filter assembly 3 or the rear surface of the partition plate 9c at the rear position, or the front and rear surfaces of the partition plate 9c. Another sheet-like filter element is brought into close contact with both sides.

  The filter element that is in close contact with almost the entire front surface of the partition plate 9a at the front position filters and collects relatively large oil particles before the gas phase fluid to be processed reaches the partition plate 9a at the front position. This contributes to increasing the oil collecting ability of the filter as a whole, and when the partition plate 9a at the front position and the main casing 1 are made of metal, rattling noise caused by these metal contacts is generated. It contributes to the prevention.

  Further, the filter element that is in close contact with the entire rear surface of the rear partition plate 9c filters and collects oil particles flowing out from the slit g3 of the rear partition plate 9c, thereby collecting the entire filter. As well as contributing to the prevention of rattling noise caused by these metal contacts when the rear partition plate 9c and the presser lid 2 are made of metal. The gas phase fluid to be processed flowing out from the slit g3 of the partition plate 9c at high speed is dispersed by the entire surface of the filter element while being suppressed by collision with the filter medium on which the filter element is formed, and separated from the filter element. This contributes to reducing the scattering of oil particles and dust flowing out.

It is an assembly drawing of the oil mist collection filter of the present invention. It is an assembly drawing of the filter assembly which is a part of the oil mist collecting filter. It is a figure which shows the modification of the said filter aggregate. It is operation | movement explanatory drawing of the said filter aggregate. It is a figure which shows the use condition of the said filter aggregate.

Explanation of symbols

3 Filter assembly 9a Partition plate 9b Partition plate 9c Partition plate 10a Filter element 10b Filter element f2 Front-rear direction g1 slit g2 slit g3 slit

Claims (5)

  Oil mist collecting filter provided with a filter assembly in which two or more partition plates formed with a plurality of slits are arranged in a line in the front-rear direction and sheet-like filter elements are arranged between the partition plates. A plurality of slits are arranged in a single row in the left-right direction for each partition plate, and each of the slits is vertically long, and the slits are formed within the length range of the partition plate in which the slits are formed. The slits of one partition plate and the slits of the other partition plate in the partition plates adjacent to each other in the front-rear direction are arranged so that they do not overlap in the front-rear direction. The total ventilation area that combines the effective opening areas of the slits is smaller than that of the partition plate on the rear side than that of the partition plate on the front side, Oil mist collection filter, wherein the process vapor fluids to flow rearward through the filter assemblies from the front side of this.   2. The oil mist collecting filter according to claim 1, wherein the slits are opened at a lower end of the partition plate on which the slits are formed, so that a portion between the slits of the partition plate has a comb shape. .   In the plurality of filter elements forming the filter aggregate, the opening of each filter element is smaller than that of the filter element on the rear side than that of the filter element on the front side, 3. The oil mist collecting filter according to claim 1, wherein the gas phase fluid to be treated flows through the filter assembly from the front side to the rear side thereof.   4. The oil mist collecting filter according to claim 1, wherein the partition plate is made of a hard material, and the filter element is made of a soft elastic material.   5. The oil mist collecting filter according to claim 1, wherein the sheet-like filter element is in close contact with a front surface portion and / or a rear surface portion of the filter assembly.

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