JP6502995B2 - Fat recovery filter - Google Patents

Description

  The present invention is an exhaust duct for separating and recovering fat and oil components, soot and the like (hereinafter referred to as fat and oil components and the like) contained in combustion exhaust gas generated from heating cookers and smokeless roasters in cooking facilities such as kitchens and barbecues. The present invention relates to a fat and oil recovery filter that can be stored in a removable manner.

Conventionally, the combustion exhaust gas generated at the time of cooking in cooking facilities such as kitchens and barbecue shops is communicated with the smoke removal duct installed above the cooker such as stoves and seven wheels, and the exhaust part suspended from a smokeless rooster A suction device such as an exhaust fan is installed in an exhaust duct piped under the floor, and combustion exhaust gas containing fat and oil components is allowed to pass through the inside of a filter installed in the exhaust path to recover oil and fat components etc. The exhaust gas is discharged from the exhaust duct to the outside.
For example, a hollow cylindrical storage body having an outer cylinder and an inner cylinder having a vent, and porous inorganic material stored in a storage space between the outer cylinder and the inner cylinder in the storage body There is a fat and oil recovery device that has a large number of adsorbents made of materials and a cap that closes the central opening of the storage body, and in the process of combustion exhaust gas passing through the adsorbent, the gaps between the adsorbents are bent intricately Most of the fat and oil components, etc., are distributed and adhere to the adsorbent by turbulent flow during passage, and the combustion exhaust gas is purified and released outside as exhaust air from the exhaust duct as purified air, and the adsorbent with reduced adsorption capacity is a new adsorbent For use (see, for example, Patent Document 1).
In other words, the removed adsorbent must be treated as industrial waste, and CO ₂ can not be released into the atmosphere during the calcination process of the adsorbent manufacturing, so there are not a few problems with the environment during and after manufacture. It can not be denied that it has an adverse effect.

  Therefore, as a reusable metal filter, an inner ring formed by holding a plurality of meandering flow forced blades arranged at predetermined intervals in a ring frame in a standing state, and a plurality of meanders similarly arranged at predetermined intervals Install an oil recovery filter in the suction flow path that combines the outer rings, which are held by the ring frame in a state where flow forced wings are erected, in which serpentine flow forced wings alternately enter each other to form a serpentine flow path. By passing the combustion exhaust gas from the outer peripheral side of the outer ring to the inner peripheral side of the inner ring, a serpentine flow is generated in the flow of the combustion exhaust gas in the serpentine flow path, and generation of this serpentine flow What recovers oil and fat components etc., that is, combustion exhaust gas flows in a flow accompanied by large meandering in a meandering channel formed, and the oil and fat components etc. in the combustion exhaust gas are separated with extremely high efficiency See Is (e.g., see Patent Document 2).

  However, according to the prior art described in Patent Document 2, although it is certainly reusable and there is no firing step at the time of manufacture, the gap between meandering flow forced vanes where the inflow and outflow sites of the combustion exhaust gas are adjacent, The slit shape is long in the direction, and is formed at predetermined intervals in the circumferential direction on both the inner and outer circumferences, and with the downward suction, the suction force strongly acts on the lower part of the vertically long outlet of the meandering channel. As the combustion exhaust gas meanders while slanting inward and downward in the meandering channel, it does not have a large meandering as a whole, and the combustion exhaust gas does not flow in the entire meandering channel without partial flow. In order to improve the removal efficiency, a certain amount of suction must be applied, and even if the inner ring and the outer ring are separated during washing, a plurality of serpentine flow forcing vanes are circumferentially provided. The shape is complicated because they are arranged at predetermined intervals The cleaning operation is troublesome.

  Therefore, the applicant of the present application has a plurality of ring-shaped filter members that are separably stacked in a manner spaced apart from each other in the vertical direction, and a central opening of the ring-shaped filter member that is separably mounted on the uppermost stage. The ring-shaped filter member has the inner and outer peripheral wall portions inclined in opposite directions and means for holding the distance, and the combustion passing between the ring-shaped filter members by the distance holding means An oil and fat recovery filter has been filed, in which a flue gas is made to flow from both inside and outside into the meandering channel by forming a channel for meandering exhaust gas (see, for example, Patent Document 3).

And this fats-and-oils recovery filter has the following effects (1) and (2).
(1) By arranging a plurality of meandering channels in the vertical direction, suction can be applied to all the outlets, so the combustion exhaust gas flows in the whole of each meandering channel, and the flue gas is meandering flow By being rapidly turned in the process of passing through the inside of the passage, an inertial force acts on the fat and oil components and the like in the sucked combustion exhaust gas, and the outer surface and the lower portion of the upper ring Since it collides with the inner surface of the ring-shaped filter member and adheres to the surface, it can be discharged to the outside after purifying the combustion exhaust gas, whereby energy efficiency can be realized by improving the removal efficiency of fat and oil components and the like.
(2) Since each ring-shaped filter member and the cover can be divided, each can be in the form of a plate or bowl whose height is kept low, so that the cleaning operation can be facilitated. As a result, it is possible to make it possible to wash even a general dishwashing machine and further to make it compact as a whole, so that it is possible to provide a filter suitable for the exhaust path limited to the storage space, yet By changing the number of pieces, it is possible to easily cope with the difference in the processing amount of the flue gas depending on the installation object.

Japanese Patent Application Laid-Open No. 11-156127 Unexamined-Japanese-Patent No. 2000-184968 JP 2011-153722 A

However, according to the prior art described in Patent Document 3 above, although it has certainly an excellent removal effect and ease of cleaning, it must be solved as in the following (1) and (2) There was a problem.
(1) In the case of recent barbecue shops that adopt the upper-sliding duct system in exhaust equipment, there is a tendency to reduce the diameter of the exhaust duct as a simple and stylish design, but the ring-shaped filter member is manufactured by press drawing Since it must be processed, it is difficult to process it into a size that can be accommodated in a small diameter exhaust duct, and therefore it will be accommodated in a filter case larger in diameter than the exhaust duct, and the exhaust duct is a simple straight cylinder. It is hard to be shaped.
(2) The load on the fan is increased because the narrow passage from the narrow gap between the adjacent ring-shaped filter members is passed and removed.

  The present invention has one or a plurality of filter units which can be accommodated in a cylindrical exhaust duct, in view of the problem that downsizing is difficult and load on the fan is large based on the above-mentioned prior art, and the filter The unit comprises a plurality of inclined plates arranged at intervals in the circumferential direction with respect to the center line of the exhaust duct, a fixing plate at the upper inner end of the inclined plate, and upper and lower outer ends of the inclined plate. If a fat and oil recovery filter having upper and lower rings for fixing the oil is accommodated in the exhaust duct, the combustion exhaust gas entering from the lower side is diverted by the plurality of inclined plates and collides with the inclined plates to change the direction. Thus, the oil and fat components and the like are made to collide with and be attached to the inclined plate, thereby making it possible to miniaturize and reduce the diameter, as it is a structure that merely assembles the inclined plate, the fixed plate and the upper and lower ring. The Even if it is in the air duct, it can be accommodated, and the problem of the above (1) is solved, and the combustion exhaust gas entering the inside is free from large flow path deflection and constriction even if there is slight deflection, to the fan Solve the problem of the above (2) by making it possible to reduce the burden of

In short, the present invention has one or more filter units that can be accommodated in a cylindrical exhaust duct, so that the recovery power of fat and oil components and the like can be adjusted by the number of filter units, and The filter unit includes a plurality of inclined plates arranged at intervals in the circumferential direction with respect to the center line of the exhaust duct, a fixing plate at the upper inner end of the inclined plate, and upper and lower outer ends of the inclined plate. Since the combustion exhaust gas which has entered the inside of the filter unit housed in the exhaust duct collides with the inclined plate and the oil and fat component adheres to it, the oil and fat in the combustion exhaust gas is fixed. The components etc. can be removed, and if one or both of the front and back surfaces of the inclined plate is an uneven surface, the oil and fat components etc. will more easily collide and the adhesion efficiency can be improved, and the filter unit is also basic Since it is formed of only the inclined plate, the fixed plate and the upper and lower ring, it can be miniaturized to such an extent that it can be stored even in a small-diameter exhaust duct, and it can be cleaned even by a dishwasher by downsizing. The inclined plate is a flat plate instead of a spiral plate, so it can be easily processed and finished inexpensively.
Also, it is a fat and oil recovery filter having a plurality of filter units, and since two mirror-symmetrical filter units are alternately arranged in series, the inclination of the inclination plate of one adjacent filter unit is the other filter unit and Since the path of the combustion exhaust gas that has passed through one filter unit is suddenly deflected in the other filter unit and collides with the inclined plate of the other filter unit, the fat component etc. are more efficiently Can be recovered.

The inclined plate has formed a large number of small holes, so when passing the combustion exhaust gas through the small holes, the fat and oil components can be made to collide and adhere to the inner peripheral surface of the small holes, and the small holes are burned. By passing the exhaust gas, the air stream can be branched and joined, so the air stream can be complicated to improve the ability to recover fat and oil components and the like.
Furthermore, at the time of cleaning, since the cleaning solution can move through the small holes, the cleaning effect and the cleaning efficiency can be improved.

  The lower ring has an annular plate portion for fixing the lower outer end portion of the inclined plate, and inner and outer side wall portions extending upward from the inner and outer peripheral portions of the annular plate portion, and the lower side of the inclined plate The portion is inclined from the inner end side to the outer end side and downward, a guide receiving portion is provided on the lower side portion, and the inner side wall portion of the lower ring is positioned inside the outer end of the guide receiving portion Since the fat and oil component and the like derived in the section can be dropped and stored in the lower ring, the fat and oil component and the like adhering to the inclined plate flow down the front and back surfaces of the inclined plate to reach the induction receiving portion, and the induction receiving The oil can be dropped and stored in the lower ring by causing the part to flow down, so that the oil and fat adhering to the inclined plate can be reliably recovered.

Since the upper and lower rings are integrated by the connecting cylinder, the integrity with the inclined plate and the fixed plate can be improved to provide an integrated rigid filter unit free of wobble between the parts.
Also in the case of hand washing, the connecting cylinder forms a parallelogram-shaped opening at the portion between the inclined plates, so that in the case of hand washing, a fingertip, a scrub, etc. enter from the opening between the inclined plates. Even in this case, washing water can flow in and out from the top, bottom, around, and the like, so that the washing can be facilitated, and so on.

It is a perspective view of a fats and oils recovery filter concerning the present invention. It is a top view of the fats-and-oils recovery filter of FIG. It is a disassembled perspective view of the fats-and-oils recovery filter of FIG. It is a front view of an inclination board. It is a side view of an inclination board. It is a perspective view of the fats-and-oils recovery filter comprised with two filter units. It is a front view of the upper pulling exhaust device which installed the fats-and-oils recovery filter of FIG.

Next, an embodiment of a fat and oil recovery filter according to the present invention will be described based on the drawings.
The fat and oil recovery filter according to the present invention is accommodated in a cylindrical exhaust duct D to remove fat and oil, oil mist, dust and the like (hereinafter referred to as fat and oil component etc.) in the sucked combustion exhaust gas. The filter unit 1 has one or a plurality of filter units 1, and the filter unit 1 includes a plurality of inclined plates 2, 2a... Arranged at intervals in the circumferential direction, and the upper side of the inclined plates 2, 2a. The fixed plate 3 at the end, and upper and lower rings 4 and 5 for fixing the upper and lower outer ends of the inclined plates 2 and 2a.

  The inclined plates 2, 2a, ... have a shape that can be accommodated in a cylindrical space, and specifically, the width is gradually narrowed toward the lower side, and the outer side portion is the outer peripheral portion of the upper and lower rings 4, 5 in plan view The lower side is preferably inclined to the outer end side and the lower side from the inner end side, and one or both of the front and back surfaces may be an uneven surface.

The details will be described below.
As shown in FIGS. 1 (a) and (b) and FIG. 2, the filter unit 1 is a metal plate in which a large number of small holes 6, 6a... Are regularly formed, that is, inclined plates 2, 2a. An upper ring 4 comprising a fixed plate 3 which is a circular metal plate, an annular plate 7 and an outer wall 8 extending downward from an outer peripheral portion of the annular plate 7; an annular plate 9; A lower ring 5 comprising inner and outer side wall portions 10 and 11 extending upward from the inner and outer peripheral portions of the annular plate portion 9 and a connecting cylinder 12 for the upper and lower rings 4 and 5 are provided.

  As shown in FIGS. 3A and 3B, the inclined plates 2, 2a,... Allow the flue gas to pass through the small holes 6, 6a, and incline inward and downward from the horizontal upper side and the upper end. The outer side, the inner side inclined outward and downward from the upper end, and the lower side inclined outward and downward from the inner end, and the fixing pieces 13 at the inner and outer ends of the upper side, The leg piece 15 is continuously formed at the outer end of the lower side inclined to the outer end side and downward from the inner end side, and the fixed piece 16 is horizontally protruded at the lower end part of the leg piece 15 The fixed piece 13 of the upper side is fixed to the fixed plate 3 and the fixed piece 14 is fixed to the annular plate 7 of the upper ring 4 by rivets, welding or the like, and the fixed piece 16 of the lower side is a circle of the lower ring 5 It is fixed to the ring plate 9 by rivets, welding or the like.

  An induction receiving portion 17 is provided on the lower side of each of the inclined plates 2, 2a,... To make it possible to guide the oil and fat components flowing down to the lower ring 5, and this induction receiving portion 17 has a V-shaped receiving plate The central bent portions are fixed to the lower sides of the inclined plates 2, 2a, ... by welding or the like, so that the both side portions 18a, 18b of the receiving plate 18 and the inclined plates 2, 2a,. It is formed on both sides.

  The upper and lower rings 4 and 5 are pressed metal plates, and the inner surface of the outer wall 8 of the upper ring 4 and the inner surface of the outer wall 11 of the lower ring 5 and the upper and lower ends of the outer surface of the cylindrical connecting cylinder 12 The upper and lower rings 4 and 5 and the connecting cylinder 12 are integrated by fixing 8a and 11a by welding or the like.

  The lower ring 5 is formed such that the inner side wall portion 10 is positioned inside the outer end of the induction receiving portion 17 so that the fat and oil component and the like derived from the induction receiving portion 17 can be dropped into the lower ring 5 .

  The connecting cylinder 12 is basically a metal cylinder, and the parallelogram-shaped openings 19, 19a are formed in the portions between the inclined plates 2, 2a, so that the adjacent openings 19, 19a,. The outer sides of the inclined plates 2, 2a,.

Although not shown, one type of two filter units 1 may be arranged in series, or as shown in FIG. 4, two types of two filter units 1 and 1a may be arranged in series. In the case, the filter unit 1 and the filter unit 1a are mirror symmetric.
That is, the fat and oil recovery filter according to the present invention may have a plurality of one type of filter unit 1 or may have two types of filter unit 1 and filter unit 1a. In the latter case, 3 If it is more than one, it is preferable to arrange the filter units 1 and the filter units 1a alternately.

Then, as shown in FIG. 5, the fat and oil recovery filter according to the present invention is accommodated in a cylindrical filter box 20 which is a part of the exhaust duct D, and the combustion exhaust gas sucked into the exhaust duct D recovers fat and oil. It enters into the filter from below, is divided between a plurality of inclined plates 2, 2a, ... and collides with the inclined plates 2, 2a, deflects the path of the combustion exhaust gas, and at that time the fat component contained in the combustion exhaust gas .. Collide with the inclined plates 2, 2a... By the inertia force of the combustion exhaust gas, and a part thereof adheres to the back surface of the inclined plates 2, 2a.
In addition, the path of the combustion exhaust gas is also deflected by passing the combustion exhaust gas through the small holes 6, 6a, ... and the fat component collides with the inner peripheral surface of the small holes 6, 6a ... by the inertia force of the combustion exhaust gas Let

  The attached fat and oil components and the like flow down along the front and back surfaces of the inclined plates 2 and 2a, and are dropped and stored in the lower ring 5 via the induction receiving portion 17.

  Since the contained oil and fat recovery filter is composed of two types of filter units 1 and 1a, the flue gas passing through the lower filter unit 1 has an inclined plate 2 whose inclination in the upper filter unit 1a is reversed, At 2a, the path is suddenly deflected and diverted to collide with the inclined plates 2, 2a of the filter unit 1a on the upper side, and the remaining oil components and the like are recovered.

1, 1a filter unit 2, 2a ... inclined plate 3 fixed plate 4 upper ring 5 lower ring 6, 6a ... small hole 9 annular plate portion
10 inner wall
11 outer wall
12 connected cylinder
17 induction receiver
19, 19a ... opening D exhaust duct

Claims (6)

  It has one or more filter units which can be accommodated in a cylindrical exhaust duct, which filter unit comprises a plurality of inclined plates which are circumferentially spaced from the center line of the exhaust duct. And a fixed plate at the upper inner end of the inclined plate, and an upper lower ring for fixing the upper and lower outer ends of the inclined plate.   The fat and oil recovery filter according to claim 1, wherein the fat and oil recovery filter has a plurality of filter units, and two kinds of mirror-symmetrical filter units are alternately arranged in series.   The oil and fat recovery filter according to claim 1 or 2, wherein the inclined plate is formed with a large number of small holes.   The lower ring has an annular plate portion for fixing the lower outer end portion of the inclined plate, and inner and outer side wall portions extending upward from the inner and outer peripheral portions of the annular plate portion, and the lower side of the inclined plate The portion is inclined from the inner end side to the outer end side and downward, a guide receiving portion is provided on the lower side portion, and the inner side wall portion of the lower ring is positioned inside the outer end of the guide receiving portion The oil and fat recovery filter according to any one of claims 1 to 3, wherein the oil and fat component and the like derived from the part can be dropped and stored in the lower ring.   The oil recovery filter according to claim 1, 2, 3 or 4, wherein the upper and lower rings are integrated by a connecting cylinder.   The fat and oil recovery filter according to claim 5, wherein the connecting cylinder has a parallelogram-shaped opening at a portion between the inclined plates.

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