JP6359000B2 - Grease filter - Google Patents

Description

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

  Conventionally, to capture particles such as oil and fat contained in exhaust gas such as oily smoke generated in kitchens, an air passage having a generally "<" shape in cross section (hereinafter referred to as "substantially" shape) is formed. In addition, there is known a grease filter composed of a ventilation path on the intake side, a ventilation path on the exhaust side, and an intermediate corner portion that changes the wind direction from the intake side to the exhaust side.

  The grease filter that forms this curved path inertially separates the mist by the contracted flow generated when the exhaust ventilates the ventilation path, and collides the mist with the outer peripheral side wall in the direction in which the mist is blown mainly by centrifugal force. The matter is aggregated and captured.

  And, as the separation performance becomes higher, the resistance of the curved path increases, and in order to enhance the separation effect, the curved path is narrowed to increase the flow velocity, or repeatedly to increase the number of separation points due to contraction The separation and capture effect is enhanced by increasing the ventilation resistance, such as forming a curved path.

Japanese Patent Application Laid-Open No. 07-1000031 JP 2004-130257 A JP2015-167910A

  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 string-like fields in which the suction side and the exhaust side are bent substantially in a letter shape. It is arranged side by side and forms a panel shape that is surrounded by a frame, and the both ends of the U-shaped ridges are fitted into a pair of opposed frame members among the frame members constituting the frame and fixed. In addition, a passage between adjacent substantially square-shaped ridges is formed in an air passage.

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, but depending on the bending angle, along the ventilation path Exhaust smoke may pass smoothly and scheduled contraction may not occur.
Also, if the bending angle is set too acute, the resistance will increase and the processing capacity will decrease, and the suction force will have to be increased. For this reason, the exhaust fan has to be increased in size for efficiency. Noise problems also arise.

  Japanese Patent Laying-Open No. 2015-167910 discloses a grease filter configured by arranging a plurality of ventilation paths in which an intake port side and an exhaust port side are bent in a substantially square shape, with an intermediate plate material sandwiched between front and back cover materials. The cover member is configured to form a main body, and tongues in the U-shaped slits formed at regular intervals in the cover material are bent toward the intermediate plate material to form an opening, and a ventilation path is provided between the bent tongue pieces. The front cover material opening is used as the air intake, the back cover material opening is used as the air exhaust, and the air intake path on the air intake side and the air flow path on the air exhaust side are arranged in a substantially square shape. In addition, the intermediate plate member is formed with a window hole that communicates each of the opposed ventilation paths.

Similar to the above, the oil and fat particles are inertially separated by the contracted flow generated when the exhaust smoke passes through the ventilation passage, and the oil and fat components collide with the outer wall in the direction in which the oil and fat particles are blown by the centrifugal force. The oil and fat are aggregated and captured, but there are not a few cases where particles of the aggregated fat and oil pass through as they are and are discharged from the exhaust port.
Therefore, the present invention is intended to provide a grease filter in which particles such as agglomerated fats and oils are captured by the colliding outer wall and are not released from the exhaust port.

In order to achieve the above object, the grease filter of the present invention according to claim 1 is a grease filter formed by forming a ventilation path in which the intake port side and the exhaust port side are bent in a substantially square shape. In the grease filter provided with a plurality of substantially letter-shaped air passages formed by arranging a plurality of partition rods arranged in parallel with each other, the folding inlet side and the outlet side being bent in a substantially letter-like shape from the part, Provided inside the bent corner portion from the intake port side to the exhaust port side of the ventilation path is a shield that narrows the ventilation path of the bent corner portion, and is bent from the intake port on the intake port side of the ventilation path. The airflow path on the intake port side is divided into two in the width direction toward the corner portion, and is provided with a dividing rod that joins in front of the bent corner portion, and is bent in the airflow path on the exhaust port side. Outside partition towards the corner That it comprises a collision鈑which projects from and is characterized in.

The present invention according to claim 2 is characterized in that, in the invention according to claim 1, the collision rod is formed in a state in which a tip portion of the partition rod constituting the ventilation path on the exhaust port side is folded back. To do.

According to a third aspect of the present invention, in the invention according to the first or second aspect, the bending of the ventilation path from the intake port side to the exhaust port side is arranged in the opposite direction on the left and right sides of the intake port surface. It is characterized by.

According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, the dividing rod is curved outwardly of the bent corner portion of the ventilation path. .

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

According to the first aspect of the present invention, the exhaust smoke containing fats and oils V-turns the corners and the fats and oils are inertially separated, and particles such as fats and oils (hereinafter referred to as the fats and oils) are generated by centrifugal force generated when passing through the corners. simply referred to as "grease".) was separated, and to try to pass grease along the direction of the outside of the partition鈑面 to be blown by the centrifugal force, it is projected from the outside of the partition鈑面 the corner direction The oil and fat are prevented from being discharged from the exhaust port by the impacted soot, and are retained in the space formed by the outer partitioning face and the impacting soot, and the oil and fat is attached to the outer partitioning face and the impacting soot. Thus, it has an effect of enhancing the action of capturing.

In addition, since the shield that narrows the ventilation path is formed inside the corner part, the ventilation path in the corner part is narrowed, causing contraction, increasing the flow rate of exhaust smoke, and increasing the ventilation resistance. It has the effect of increasing the action of separating the oil and fat and capturing the oil and fat and the like that have been agglomerated by collision of the oil and fat with the partition wall surface in the direction of being blown off.

  In addition, a split kite 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. Improves inertia separation of fats and oils by colliding and joining, and promotes the inertial separation of oils and fats, and also has the effect of collecting and collecting oils and fats by impact by colliding with partition rods and split rods due to the centrifugal force of the compressed flow It is.

In addition to the effect of the invention of the first aspect, the collision kit is formed in a state in which the tip of the outer partition rod surface that constitutes the ventilation path on the exhaust port side is folded back. Therefore, the oil and fat which has progressed without being able to catch up to the exhaust port hits the collision soot, and it is possible to reliably hold and supplement the oil.
In addition, by folding the front end portion of the outer partition wall surface that constitutes the ventilation path, there is an effect that a collision rod projecting from the partition wall surface can be formed easily and easily.

  In the invention according to claim 3, in addition to the effect of the invention according to claim 1 or 2, the exhaust gas discharged from the exhaust port is centrally arranged by reversing the bending direction of the ventilation path on the left and right sides. Gathering together, accelerating by merging, and exhibiting the effect of being able to smoothly exhaust to the outdoors.

  In addition to the effects of any one of the first to third aspects, the invention according to claim 4 has a structure in which the dividing rod is curved outward from the bent corner portion of the ventilation path. The exhaust smoke passing through the outside ventilation passage is guided in the direction of the outside partition wall and collides with it, so that it does not pass through the narrowed corner, and the ventilation from the intake port to the inside of the corner It exhibits the effect of reliably generating contraction by colliding with and joining exhaust smoke passing through the road.

  In addition to the effect of any one of the first to third aspects, the invention according to claim 5 is the one in which the dividing rod is installed at an angle where the dividing rod is not parallel to the inner and outer flanges. If it is installed at an angle inclined in the direction, the same effect as in the fourth aspect is 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 that passes through the ventilation path inside the corner increases the speed by narrowing the passage, and the exhaust smoke that passes through the outer ventilation path collides with and merges near the corner to generate a larger contracted flow. To demonstrate.

It is the disassembled perspective view which shows one embodiment of this invention. It is a perspective view which shows the state which attaches a shield 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. Is configured.
Therefore, the partition wall 1 at the intermediate position serves as both the inner surface and the outer surface of the adjacent ventilation path 5.

Further, the tip of the partition rod 1 on the exhaust port 23 side is folded at an acute angle toward the side located on the outer partition rod surface 1 </ b> A constituting the ventilation path 5, and the folded portion forms the collision rod 6.
That is, the air inlet 21 side and the air outlet 23 side are formed by forming bent air passages 5 and 5 that are bent in a substantially square shape, and in the air passage 5 on the air outlet 23 side that is folded back from the bent corner portion 22, The collision rod 6 is configured to project from the outer partition rod surface 1A toward the corner portion 22.
The collision rod 6 may be formed by, for example, planting a plate-shaped rod in a partition projecting from the intermediate portion of the outer partition rod surface 1A in the partition rod 1 on the exhaust port 23 side.

And the shield 3 is arrange | positioned inside the bent corner part 22, and the ventilation path 5 of the corner part 22 is narrowed.
Further, 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 rods 1 and the shields 3 are formed by bending a single plate, and one of the bent portions is a partition rod 1 and the other is a shield 3.
The width of the partition wall 1 is the length on the intake port 21 side or the exhaust port 23 side of the ventilation path 5, and the shield 3 is the length (width) that narrows the ventilation path 5 of the corner portion 22, with each predetermined dimension. Designed.

Then, the upper and lower ends of the plurality of shields 3, 3... Are fixed to the upper and lower frames 12 and 13 of the mounting frame 11 at regular intervals, and the ventilation path 5 is formed between the adjacent partition walls 1. To do.
The shield 3 is fixed on both the front and back surfaces of the upper and lower frames 12 and 13, and each shield 3 is moved upward at regular intervals in a direction in which the bent partition 1 is protruded in parallel.・ It is fixed to the lower frames 12 and 13 (FIG. 2).
In addition, on both the front and back sides of the upper and lower frames 12 and 13, the air passages 5 and 5 are fixed by affixing at the positions where the shields 3 and 3 on both sides overlap so that the partition bar 1 protrudes in an opposite direction. Is forming.

Therefore, the shield 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 both sides of the shields 3 and 3 are fixed in contact with each other, the ventilation passages 5 and 5 on each surface communicate with each other, and the ventilation passages 5 and 5 bent in a substantially square shape are formed. One surface is the intake port 21 side, and the other surface is the exhaust port 23 side.

The shield 3 is positioned inside the bent corner portion 22, and the width of the corner portion 22 that communicates the ventilation paths 5 and 5 with respect to the intake port 21 side and the exhaust port 23 side in the corner portion 22 is narrowed.
Determines the width of the air passage 5 and 5 a Saegi鈑 3 in upper and lower frame 12, 13 by a distance that Tochaku fixed length of narrowing the air passage 5 of the corner portion 22 by the length of Saegi鈑 3 (width) 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.
By disposing the bending direction of the ventilation path 5 on the left and right sides, the exhaust gas discharged from the exhaust port 23 gathers in the center, joins and accelerates, and has the effect of smoothly exhausting to the outside.

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 fats and oils passes through the corner portion 22 narrowed by the shield 3, the air current makes a V-turn and the fats and oils etc. are inertially separated at the same time as the contraction flow occurs. Oils and fats etc. are separated by centrifugal force generated when passing, and the oils and fats etc. collide with the partition wall 1 and the shield 3 in the direction in which the oils and fats are blown off by the centrifugal force, and have the effect of aggregating and capturing. (FIG. 4).

Further, when the exhaust smoke V-turns in the corner portion and the oil and fat components are inertially separated, the oil and fat components and the like are separated by the centrifugal force generated when passing through the path, and the outside of the partition wall 1 in the direction to be blown by the centrifugal force Since the oil and fat components try to pass along the partition wall surface 1A, the oil and fat components are prevented from being discharged from the exhaust port 23 by the collision rod 6 protruding from the partition rod 1 in the direction of the corner portion 22. The action is retained in the space 7 formed by the partition rod surface 1A outside the partition rod 1 and the collision rod 6, and the oil and fat is attached to and trapped on the partition rod surface 1A and the collision rod 6 outside the partition rod 1. To increase.

  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 oil drain holes are formed on the bottom surface where the frame surface 15 forming the bottom surface and the frame surface 41 on which the dividing rod 4 is formed are overlapped, the partition rod 1, the shielding 3 and the dividing rod 4 or the collision rod 6 are formed. The oil and fat components that have collided and agglomerated, trapped and flowed down are discharged.

Separation performance of oil and fat is related to the resistance of the bent path, so by setting the width of the shield 3 arbitrarily with respect to the width of the ventilation path 5, the ventilation resistance can be increased or decreased. It is possible to provide a simple 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 rod 1A Outside partition rod surface 3 Shade 4 Divided rod 5, 5A, 5B Ventilation path 6 Collision rod 7 Space 11 Mounting frame 12 Upper frame 13 Lower frame 14, 16 Connecting piece 15 Frame frame 21 Inlet 22 Corner 23 Exhaust port 41 Frame surface

Claims (5)

In the grease filter provided with a plurality of substantially letter-shaped air passages formed by arranging a plurality of partitioning rods formed by bending the inlet port side and the exhaust port side in a substantially letter-like shape in parallel. The bent corner portion is provided on the inner side of the bent corner portion from the intake port side to the exhaust port side to narrow the ventilation path of the bent corner portion, and the bent corner portion from the intake port on the intake port side of the ventilation path The air flow path on the air inlet side is divided into two in the width direction, and is provided with a dividing wall that joins in front of the bent corner part, and the air flow path on the exhaust port side has the bent corner part direction A grease filter characterized by having a collision rod protruding from the outer partition wall surface . 2. The grease filter according to claim 1, wherein the collision soot is formed in a state in which a tip end portion of the partition soot constituting the ventilation path on the exhaust port side is folded back. The grease filter according to claim 1 or 2, characterized in that bending of the ventilation path from the inlet side to the exhaust port side is arranged in the opposite direction on the left and right sides of the inlet port surface . The grease filter according to any one of claims 1 to 3, wherein the divided saddle is curved toward the outside of the bent corner portion of the ventilation path . The grease filter according to any one of claims 1 to 3, wherein the dividing rod is installed at an angle not parallel to the partition rod .

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