JP2016055239A - Grease filter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide grease filter capable of improving a processing ability under a low static pressure and capable of expecting the size reduction/labor saving of an exhaust fan.SOLUTION: There is formed a ventilation flue 5, in which the side of an intake port 21 and the side of an exhaust port 23 are bent in an approximately dog-leg shape. The ventilation flue 5 is constituted by arranging partitions 1 in parallel in the width direction. Shielding narrow plates 3 are formed inside of a bent corner part 22 thereby to narrow the ventilation flue 5 of the corner part 22. Partition plates 4 are disposed from the intake port 21 toward the corner part 22 thereby to halve widthwise the ventilation flue of a partition from the intake port 21 to the corner part 22 into halves 5A and 5B.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a grease filter for capturing particles (including mist state) contained in exhaust gas such as oil and smoke, and in particular, a grease filter for capturing oil and fat and dust generated in a kitchen or the like. It is suitable for.

  Conventionally, it has a ventilation path with a generally "<" shape in cross-section (hereinafter referred to as "substantially" "") to capture mist contained in exhaust gas such as oil smoke generated in a kitchen, There is known a grease filter including a ventilation path, a ventilation path on the exhaust side, and an intermediate corner ventilation path that changes the wind direction from the intake side to the exhaust side.

  The grease filter that constitutes this bent path causes the mist to inertially separate by the contracted flow generated when exhaust passes through the path, collides the mist with the outer peripheral side wall in the direction in which the mist is blown off by centrifugal force, and agglomerates oil and fat. To capture.

  The resistance of the bent path increases as the separation performance increases, and the bent path is narrowed to increase the separation effect, the flow rate is increased, and the bent path is repeatedly increased to increase the number of separation points due to contraction. The effect of separating and capturing is enhanced by increasing the ventilation resistance.

Japanese Patent Application Laid-Open No. 07-1000031 JP 2004-130257 A

  The grease filters disclosed in Japanese Patent Laid-Open No. 07-1000031 and Japanese Patent Laid-Open No. 2004-130257 have a plurality of continuous plate-like plates in which the suction side and the exhaust side are bent in a substantially square shape. A panel is formed by enclosing it with a frame, and the both ends of the rectangular plate are fixed by being fitted into a pair of opposing frame members among the frame members constituting the frame, It is formed in a ventilation path between adjacent substantially square plates.

Therefore, it is expected that an intake-side ventilation path and an exhaust-side ventilation path will be formed in a substantially square shape to generate a contracted flow and give an inertia separation action. The planned contraction may not occur.
Also, if the bending angle is set too sharply, the resistance increases, and the processing capacity must be lowered or the suction power must be increased. In order to improve efficiency, the exhaust fan must be enlarged, and the problem of noise Also occurs.

  Therefore, the company intends to provide a grease filter that can improve processing capacity with low static pressure, and can be expected to reduce the size and labor of exhaust fans.

  In order to achieve the above object, the grease filter of the present invention according to claim 1 forms an air passage in which the air inlet side and the air outlet side are bent in a substantially square shape, and the air passage is partitioned in the width direction. In a grease filter constructed by arranging a plurality of ridges in parallel, a narrow ridge is formed inside the bent corner, narrowing the ventilation path of the corner, and dividing ridges from the inlet to the corner It is installed, and a part of the ventilation path from the inlet to the corner is divided in the width direction.

  The present invention according to claim 2 is characterized in that, in the invention according to claim 1, the dividing rod is curved outwardly of the bent corner portion of the ventilation path.

  According to a third aspect of the present invention, in the first aspect of the present invention, the dividing bar is installed at an angle not parallel to the partition bar.

  According to the first aspect of the present invention, the narrow air passage is formed inside the bent corner portion of the ventilation passage, and the ventilation passage of the corner portion is narrowed. By increasing the resistance, it has the effect of enhancing the separation and capture of fats and oils, and at the same time, the airflow makes a V-turn and the fats and oils are inertially separated, and the fats and oils are reduced by the centrifugal force generated when passing through the path. It has the effect of enhancing the action of separating and collecting the grease and the like by causing the oil and fat to collide with and flocculate the partition rod and split rod in the direction in which the mist is blown off by centrifugal force.

  In addition, a dividing plate was installed from the air inlet to the corner, and part of the ventilation path from the air inlet to the corner was divided in the width direction, so the exhaust smoke coming from the two directions was near the corner where the smoke became narrower. A larger contracted flow than collision and merging is generated, which promotes the inertial separation of oil and fat, and also has the effect of collecting and collecting oil and fat by impact by colliding with a partition rod or divided rod by the centrifugal force of the contracted flow. is there.

  In addition to the effect of the invention of claim 1, the invention according to claim 2 divides the split rod toward the outside of the bent corner portion of the ventilation passage, so that the ventilation passage from the inlet to the outside of the corner portion Exhaust smoke that passes through the air vents inside the corner from the air intake vent, avoiding that the exhaust smoke passing through the air is guided in the direction of the outer divider and collides with it and passes through the narrowed corner. It exhibits the effect of reliably generating contraction by colliding with and joining smoke.

  In addition to the effect of the invention of claim 1, the invention according to claim 3 is the one in which the dividing rod is installed at an angle that is not parallel to the partition rod, so that the angle is inclined to the outside of the corner portion. If installed, the same effects as those of the second aspect are exhibited.

  In addition, if the split rod is installed at an angle inclined toward the inside of the corner, the exhaust smoke passing through the ventilation path outside the corner will be once diffused and throttled at the corner, and at the same time the speed will slow down. The exhaust smoke passing through the ventilation path inside the corner increases the speed by narrowing the passage, and the exhaust smoke passing through the outer ventilation path collides with and merges with the corner near the corner to produce a larger contracted flow. It is something that demonstrates.

It is the disassembled perspective view which shows one embodiment of this invention. It is a perspective view which shows the state which attaches the shielding rod to an attachment frame. It is a perspective view which shows the state which assembled FIG. It is the AA sectional view (a) of FIG. 3, and a partially expanded sectional view (b). It is a principle figure which shows the oil-separation effect | action of the grease filter of this invention. It is a partial cross-sectional view (a) and a partially enlarged cross-sectional view (b) of a grease filter which is a modification of the present invention. It is the partial cross-sectional view (a) and partial expanded sectional view (b) of the grease filter which are another modification of this invention.

An embodiment of the present invention will be described based on an example of the drawings.
FIG. 1 is an exploded perspective view showing an embodiment of the present invention, and FIG. 3 is a perspective view showing an assembled state.

The grease filter of the present invention forms a ventilation path 5 in which the intake port 21 side and the exhaust port 23 side are bent in a substantially square shape, and the ventilation path 5 has a plurality of partition rods 1 arranged in parallel in the width direction. The shield 3 is formed inside the bent corner portion 22 and the ventilation path 5 of the corner portion 22 is narrowed.
In addition, the split rod 4 is installed from the air inlet 21 toward the corner portion 22, and a part of the air passages 5 extending from the air inlet 21 to the corner portion 22 is divided into two halves 5A and 5B in the width direction.

The partition rod 1 and the narrow rod 3 are formed by bending a single plate. One of the folded rods is the partition rod 1 and the other is the narrow rod 3.
The width of the partition rod 1 is the length of the ventilation passage 5 on the intake port 21 side or the exhaust port 23 side, and the shielding rod 3 is the length (width) for narrowing the ventilation passage 5 of the corner portion 22 of the ventilation passage. Designed with predetermined dimensions.

Then, the upper and lower ends of the plurality of shielding rods 3, 3... Are fixed to the upper and lower frames 12 and 13 of the attachment frame 11 at regular intervals, and the ventilation path 5 is provided between the adjacent partition rods 1. Form.
The shields 3 are fixed on the front and back surfaces of the upper and lower frames 12, 13, and each of the shields 3 is spaced at regular intervals in the direction in which the folded partition 1 protrudes in parallel. Is fixed to the upper and lower frames 12 and 13 (FIG. 2).
In addition, on both the front and back surfaces of the upper and lower frames 12 and 13, the air passage 5 is fixed by affixing at the position where the shielding rods 3 and 3 on both sides overlap so that the partition rod 1 protrudes in the opposite direction. 5 is formed.

  Therefore, the shielding rod 3 is attached to the front and back surfaces of the mounting frame 11, and the partition rods 1, 1... Projecting in parallel form the ventilation passages 5, and both sides of the partition rods 1, 1. Since it sticks and is fixed at the position where both sides of the shielding rods 3 and 3 are superposed, protruding in the opposite direction, the air passages 5 and 5 on each surface communicate with each other, and the air passages 5 bent in a substantially square shape, 5 can be formed, one surface being the intake port 21 side and the other surface being the exhaust port 23 side.

And the narrow shield 3 is located inside the bent corner portion 22, and the width of the corner portion 22 that communicates the ventilation paths 5 and 5 to the intake port 21 side and the exhaust port 23 side in the corner portion 22 is narrowed. .
The width of the ventilation passages 5 and 5 is determined by the interval at which the shielding shield 3 is fixed to the upper and lower frames 12 and 13, and the ventilation passage 5 of the corner portion 22 is narrowed by the length (width) of the shielding shield 3. The length can be determined.

In the drawings in the embodiment, a set of two attachment frames 11 in which the ventilation path 5 is inclined and protruded in different directions on the left and right.
In addition, a connecting piece 14 protrudes from the front and back surfaces of the mounting frame 11 in which the ventilation paths 5 and 5 are formed. The connecting piece 14 is fixed to the connecting piece 16 of the frame frame 15 and is attached to the two mounting frames 11. , 11 are placed side by side on the left and right sides of the frame 15.
The outer peripheral surface of the frame 15 forms the peripheral surface of the grease filter.

On the other hand, the dividing rod 4 that divides a part of the ventilation path 5 in the width direction 5A and 5B from the air inlet 21 to the corner portion 22 is formed with a U-shaped slit at a regular interval in a rectangular flat surface. The tongue piece is bent to one side.
Further, the peripheral edge of the rectangular flat surface folds to the same surface side where the divided ridges 4 are formed to form a frame surface 41, which overlaps with the outer peripheral surface of the frame frame 15 to surround the peripheral surface of the grease filter. Configure.

Then, the window hole 42 is divided by positioning the front end portion of the partition rod 1 at the middle portion of the window hole 42 in which the divided rod 4 is formed, and the adjacent window holes 42, 42,. -Becomes the air inlet 21 that divides the ventilation path 5 into two halves 5A and 5B, and the window hole 42 is open, so there is no problem in ventilation, and the width of the remaining part 43 of the window hole 42 and the rectangular flat wall is the air inlet. It is the same length as the horizontal width of 21.
In the embodiment of the drawing, the folding direction of the split rod 4 is reversed on the left and right sides of the center so that the two mounting frames 11 and 11 are aligned with the ventilation path 5 inclined in different directions on the left and right.

Therefore, in the grease filter of the present invention installed in the exhaust device, exhaust smoke passes from the intake side intake port 21 through the ventilation paths 5A and 5B, passes through the corner portion 22, and passes through the exhaust side ventilation path 5 to the exhaust port. It passes through the bent path to 23.
And when the exhaust smoke containing oil and fat passes through the corner portion 22 narrowed by the shielding rod 3, the air flow makes a V-turn and the oil and fat etc. are inertially separated at the same time as the contracted flow. The oil and fat etc. are separated by centrifugal force generated when passing through the oil, and the oil and fat etc. collide with the partition rod 1 and the shielding rod 3 in the direction in which the oil and fat etc. are blown off by the centrifugal force, and are aggregated and captured. It plays (FIG. 4).

  Further, the dividing plate 4 is installed from the air inlet 21 toward the corner portion 22, and a part of the ventilation passages 5 extending from the air inlet 21 to the corner portion 22 is divided into two halves 5A and 5B in the width direction. Collision and merging near the corner 22 where the smoke is narrowed to generate a larger contracted flow, promote inertial separation of oil and fats, etc. It has the effect of colliding with the trough 3 and capturing the aggregation of oil and fat by impact.

  In the embodiment shown in the drawing, the split rod 4 is curved toward the outside of the bent corner portion 22 of the ventilation passage 5, so that exhaust smoke passing through the ventilation passage 5 </ b> A outside the corner portion 22 from the air inlet 21. It avoids passing through the corner portion 22 that is guided in the direction of the outer partition 1 and straightly constricted, and collides with and merges with the exhaust smoke passing through the ventilation path 5B inside the corner portion 22 from the intake port 21. Thus, the action of reliably generating the contracted flow is achieved (FIG. 5).

  Further, the dividing rod 4 may be installed at an angle that is not parallel to the partition rod 1, and if it is installed at an angle inclined to the outer side of the corner portion 22, the same effect as the curved dividing rod 4 can be obtained. (FIG. 6).

  Further, if the split rod 4 is installed at an angle inclined toward the inside of the corner portion 22, the exhaust smoke passing through the ventilation path 5 </ b> A outside the corner portion 22 is once diffused and throttled at the corner portion 22. At the same time, the speed is reduced, and the exhaust smoke passing through the ventilation path 5B inside the corner portion 22 is increased in speed by the passage being restricted, and collides with and merges with the exhaust smoke passing through the outer ventilation path 5A near the corner portion 22. This produces the effect of generating a larger contracted flow (FIG. 7).

In the embodiment of the drawings, the slope of the partition 1 is divided in the left-right direction with the central part as a boundary, but it may be unified in any one direction, and the matter designed in accordance with the conditions of use place etc. It is.
Further, if an oil drain hole is formed in the bottom surface where the frame surface 15 that forms the bottom surface and the frame surface 41 on which the divided rod 4 is formed overlaps, it collides with the partition rod 1, the shielding rod 3, and the divided rod 4. It has the effect of discharging the agglomerated oil and fats that have been agglomerated and flowed down.

  Separation performance of oils and fats is related to the resistance of the bent path, so by setting the width of the shield bar 3 to the width of the ventilation path 5, the ventilation resistance can be increased or decreased. It is possible to provide a simple grease filter. Stainless steel is often used as the material for this type of filter, and surface treatment for preventing adhesion of oils and fats and special treatment for facilitating the flow-off during cleaning can also be performed.

  As mentioned above, although embodiment of this invention was concretely described based on drawing, this invention is not limited to said embodiment, Other embodiment in the range which does not deviate from the thought of invention is also included. Applicable.

DESCRIPTION OF SYMBOLS 1 Partition fence 3 Narrow shield 4 Divided fence 5, 5A, 5B Ventilation path 11 Mounting frame 12 Upper frame 13 Lower frame 14, 16 Connection piece 15 Frame frame 21 Intake port 22 Corner part 23 Exhaust port 41 Frame surface

Claims (3)

  An air inlet side and an air outlet side form a substantially ventilated air passage, and the air passage is formed by arranging a plurality of partition walls in parallel in the width direction. A narrow fence was formed on the inside to narrow the ventilation path at the corner, a split fence was installed from the inlet to the corner, and a part of the ventilation path from the inlet to the corner was divided in the width direction. A grease filter characterized by   2. The grease filter according to claim 1, wherein the divided saddle is curved toward the outside of the bent corner portion of the ventilation path.   2. The grease filter according to claim 1, wherein the split rod is installed at an angle not parallel to the partition rod.

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