JP5496628B2 - Edible oil filter - Google Patents

Description

  The present invention relates to a filtration device for regenerating and using edible oil after use.

  Edible oils used for cooking tempura, fried foods, and the like deteriorate with repeated use and the passage of time due to the accumulation of oxides and the inclusion of impurities such as fried rice cake. And when deterioration progresses, a discoloration and an odor will generate | occur | produce and edible aptitude will fall. However, it is uneconomical to dispose of edible oil with a small number of uses, and it causes environmental pollution. This problem is particularly serious when a large amount of edible oil is used in a business such as a restaurant. Then, it regenerates by filtering impurities, such as an oxide and a foreign substance, from the edible oil after use, and the increase in the frequency | count of use or extension is aimed at.

  Various types of filtration devices for this purpose are known. For example, the filtration device described in Patent Document 1 has a structure in which an adsorbent packed in a bag is placed at the bottom of an oil storage tank, and the filtered oil is sent out of the device by a pump or circulated to the oil storage tank. . Since this apparatus uses an adsorbent confined in a bag, the contact rate with respect to contaminants in the oil is low, and the filtration efficiency is low. Filtration efficiency is compensated by speeding up the oil flow using a pump, but the apparatus has the disadvantage of being large and expensive.

  The filtering device described in Patent Document 2 also has a structure in which filtered oil is sucked by a pump connected to an oil receiving tank, and the device is large and expensive. Moreover, the filtration structure is formed by laminating a screen, filter paper, filter paper, mesh net, and filter cloth in this order on the bottom of the tank. In this filtration structure, a space is provided by interposing a mesh network between the filter paper and the filter cloth, but the space is only equivalent to the thickness of the mesh structure of the mesh network. Since this filtering device is used by filtering the used oil as it is, only the contaminants in the oil are supplemented, and the problem of clogging hardly occurs. On the other hand, if a powdery adsorbent is added to the oil in order to increase the filtration efficiency, this filtration structure will be clogged, making it impossible to use it with a small amount of filtration.

  In the filtering device described in Patent Document 3, a filter element made of filter paper laminated in a container for storing used tempura oil is placed, and a large-diameter covering plate is projected from the outer periphery of the filter element on the filter element. It is what I put on. In this apparatus, the upper surface of the filter element is covered with a covering plate to prevent large impurities from adhering to the filter element and causing clogging. However, this apparatus is also used by filtering the used oil as it is, and the filter element is supplemented only with impurities in the oil. In this structure, when a powdery adsorbent is added to oil, the filter paper is clogged by the adsorbent with a small amount of filtration.

JP 2001-190906 A JP 2004-267432 A JP 2002-58921 A

  An object of the present invention is to solve these problems of the prior art and to provide a low-cost filtration device capable of quickly and efficiently filtering edible oil to which a powdered adsorbent has been added while preventing clogging of filter media. And

In order to achieve the above-mentioned object, the present invention is an edible oil filtration device for filtering and adding a powdered adsorbent to edible oil after use and dropping and storing regenerated oil in a lower oil receiving container, An oil sump container having a bottom wall and a side wall, having an opening at an upper end and having a discharge hole formed in the bottom wall, a porous member placed on the bottom wall so as to cover the discharge hole, and the bottom has a size to cover the wall has a discharge filter sheet placed so as to cover said porous member, and the intermediate member to be placed on the exhaust filter sheet, a size to cover the inner wall surface of the oil reservoir the placed on the intermediate member, and a receiving filter sheet to accept edible oil after use, wherein the intermediate member is stood up from the edge of the horizontal portion and the horizontal portion for pressing the vicinity of the peripheral portion of the discharge filter sheet a rectangular frame wire having a plurality of upstanding portions, said Two cross wires that extend so as to connect upstanding portions of the wires and are orthogonal to each other, and a spiral wire that spirally extends on the cross wire, the cross wire and the spiral wire, has a number of openings between the wires extending in a cross shape and spiral, edible oil characterized that you form a bridge portion said supported on the end over the standing part supporting the bottom of said receiving filter sheet A filtration device is provided.

Action

  The filtration device according to the present invention uses an oil sump container having a bottom wall and a side wall and an opening at the upper end, and forms a discharge hole in the bottom wall, and a porous member covering the discharge hole on the bottom, The discharge filter sheet having a size covering the wall, the intermediate member, and the receiving filter sheet are sequentially mounted. Since the receiving filter sheet is sized to cover the inner wall surface of the oil reservoir, the oil is filtered through the receiving filter sheet having a large area. Therefore, when edible oil added with powdered adsorbent is stored in an oil reservoir, not only impurities such as oxides and contaminants, but also adsorbent adsorbing them are dispersed in a large area receiving filter sheet. Removed. As a result, the receiving filter sheet is prevented from being clogged.

The edible oil filtered by the receiving filter sheet concentrates on the peripheral edge of the bottom wall through the receiving filter sheet covering the entire side wall. On the other hand, the rectangular frame wire which comprises an intermediate member is provided with the horizontal part which hold | suppresses the peripheral part vicinity of a discharge filtration sheet. Therefore, the discharge filter sheet is pressed around Accordingly periphery in the horizontal portion of the frame wire, since also added its own weight of edible oil to the holding force, to move the discharge filter sheet by the flow which is concentrated on the bottom wall peripheral portion Is reliably prevented. Further, the intermediate member is formed by a plurality of upright portions rising upward from the edge of the horizontal portion of the frame wire, and a cross wire and a spiral wire, and a plurality of openings are formed between the wire extending in the cross shape and the spiral shape. a, and a bridge portion for supporting the bottom of the receiving filter sheet is supported on an upper portion of the upright portion. Thus, receiving filter sheet is supported bottom by bridge portion on which is supported on the end of the standing portion, between the receiving filter sheet and the discharge filter sheet, a large space having a height corresponding to the standing portion It is formed. The edible oil that has passed through the receiving filter sheet is contaminated with impurities and adsorbents that have not been removed, but after they are dispersed within the large space, they reach the discharge filter sheet and are removed. As a result, clogging of the discharged filtration sheet is reliably prevented.

  Further, as time elapses from the start of filtration, the adsorbent settles and accumulates at the bottom of the container, and the oil passage speed at the deposition site decreases. However, since the receiving filter sheet has a large area covering the container side wall, rapid filtration is maintained in the portion covering the container side wall above the height of the adsorbent deposition. And the edible oil filtered by the receiving filter sheet part which covers this container side wall flows into a discharge | emission filter sheet through the flow path ensured by the large space under the receiving filter sheet formed of the intermediate member. In this way, by using the powdery adsorbent, minute impurities that are difficult to remove by direct filtration can be attached to the adsorbent and removed by the receiving filter sheet and the discharge filter sheet. As described above, the filter cloth and the discharge filter sheet are reliably prevented from being clogged even with edible oil to which an adsorbent is added. Thus, according to the apparatus of the present invention, impurities can be quickly filtered with high efficiency.

  In addition, the filtration device according to the present invention can form a filtration structure by simply placing the porous member, the discharge filtration sheet, the intermediate member, and the receiving filtration sheet in the oil reservoir container in this order. Can be dropped and stored in the lower oil receiving container, the entire structure is simple and can be manufactured at low cost.

  As described above, according to the present invention, it is possible to provide, at a low cost, a filtration device that can filter edible oil added with a powdery adsorbent with high efficiency while preventing clogging of the filter medium.

It is a perspective view of the filtration device concerning one embodiment of the present invention. It is a perspective view which decomposes | disassembles and shows the filtration apparatus shown in FIG. It is a perspective view which shows the state which decomposed | disassembled the filtration apparatus shown in FIG. 1 in a partial cross section. It is a top view of the filtration apparatus shown in FIG. It is a perspective view which decomposes | disassembles and shows the principal part in the filtration apparatus shown in FIG. It is a longitudinal cross-sectional view of the bottom part in the filtration apparatus shown in FIG. It is a perspective view of the filtration apparatus concerning other embodiments of the present invention.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. 1 to 4 show an edible oil filtration apparatus according to an embodiment of the present invention. FIG. 1 is a perspective view of a use state, FIG. 2 is an exploded perspective view, and FIG. 3 is an exploded view of an internal structure. The perspective view shown in FIG. 4 is a plan view.

  In this edible oil filtration device 1, edible oil added with a powdered adsorbent is filtered by a filtration structure 20 in an oil reservoir container 10 and stored in an oil receiving container 80 below. . The oil sump container 10 includes a bottom wall 11 and a side wall 12, has an opening 13 at the upper end, and a plurality of small-diameter discharge holes 14 are formed in the bottom wall 11. In this embodiment, the oil sump container 10 has a rectangular parallelepiped shape, and for this, for example, a tin 18 liter can (so-called Ito can) can be used. The discharge hole 14 is sized to hold the discharge filter sheet 40 against the weight of the liquid to be filtered, and is provided with one or more discharge holes so as to obtain an appropriate amount of the liquid to be filtered. The shape can be various, such as a circle, an oval, a polygon such as a triangle or a rectangle, and an elongated slit.

  As shown in FIG. 5, the filtration structure 20 includes a porous member 30 placed on the bottom wall so as to cover the discharge hole 14, a discharge filter sheet 40 placed so as to cover the porous member 30, and a discharge filter sheet 40. An intermediate member 50 placed on the intermediate member 50 and a receiving filter sheet 60 placed on the intermediate member 50 are provided.

  In this embodiment, the porous member 30 is formed of a mesh member, and is flat and rectangular as a whole. The outer peripheral wire 31 extends so as to form a rectangle, and the intersecting wire 32 is supported by both ends of the outer peripheral wire 31 and extends. The crossing wires 32 are thinner than the outer peripheral wires 31, and each is supported by winding both ends of the outer peripheral wires 31.

  The discharge filter sheet 40 is a rectangular sheet having a size larger than that of the porous member 30, and in this embodiment, two sheets are used in an overlapping manner. However, the number of sheets can be determined according to the thickness, density, material, and the like of the discharge filtration sheet 40, and can be one sheet or three or more sheets. In this embodiment, the filter paper which uses a pulp as a main raw material is used, for example, kitchen paper can also be used.

  The intermediate member 50 is composed of a rectangular frame wire 51, two cross wires 52 extending so as to connect opposite corners of the frame wire, and a spiral wire 53 extending spirally on the cross wire. It is configured. The frame wire 51 includes a horizontal portion 511 extending so as to form a rectangle slightly smaller than the rectangular shape of the discharge filtration sheet 40, and an upright portion 512 formed by bending a corner portion of the rectangle obliquely upward. The two cross wires 52 extend so as to connect the upper ends of the upright portions 512, are orthogonal to each other, and support the spiral wire 53 thereon, and these wires are integrally joined by welding. . Thus, the cross wire 52 and the spiral wire 53 have a large number of openings between the wires extending in a cross shape and a spiral shape, and extend horizontally at a position higher than the horizontal portion 511 by the standing portion 512 of the frame wire 51. A bridge portion 50a is formed.

  The receptive filtration sheet 60 has a flat bag shape with an open upper end, and is configured to cover the inner wall surface when inserted along the rectangular parallelepiped inner wall surface of the oil reservoir 10. ing. However, the bag shape may be formed in advance in a rectangular parallelepiped shape along the inner surface of the oil sump container 10. The receptive filtration sheet 60 can be formed of, for example, a filter material mainly composed of pulp, and can also be formed of a nonwoven fabric, a net fabric, or the like made of synthetic fibers, natural fibers, or a mixture thereof.

  In this embodiment, the edible oil filtration device 1 further includes an oil receiving container 80 that receives oil discharged from the oil sump container 10, and a holding frame 70 that is interposed between the oil sump container 10 and the oil receiving container 80. I have.

  The oil sump container 10 and the oil receiving container 80 are the same rectangular parallelepiped containers, and the oil receiving container 80 can be, for example, a tin 18 liter can. The holding frame 70 includes an upper side wall 71 that fits outside the bottom 11 of the oil sump container 10, a lower side wall 73 that fits inside the upper opening 81 of the oil receiving container 80, a lower end of these upper side walls 71, and An intermediate wall 72 that joins the upper end of the lower side wall 73, and the intermediate wall 72 is placed on the upper end of the oil receiving container 80.

  Next, the manufacturing method of this edible oil filtration apparatus 1 is demonstrated. First, the oil sump container 10 is prepared. As described above, a tin 18 liter can can be used. In this case, when there is a top wall, the top wall is cut and removed, and the discharge hole 14 is formed in the bottom wall 11 with a cone or the like. Further, it is desirable that the central portion of the bottom wall 11 is pushed and deformed so that the filtered edible oil flows smoothly to the discharge hole 14 so that the bottom wall 11 has a slope that descends from the peripheral portion to the central portion.

  A filtration structure is formed in the oil reservoir 10. To this end, first, the porous member 30 is placed on the bottom wall 11 so as to cover the discharge hole 14 of the oil reservoir 10. Then, the discharge filtration sheet 40 is placed so as to cover the porous member 30, and the intermediate member 50 is placed on the discharge filtration sheet 40. Thus, the vicinity of the peripheral edge portion of the discharge filtration sheet 40 is pressed by the horizontal portion 511 of the frame wire 51 constituting the intermediate member 50. Next, the receiving filtration sheet 60 is inserted into the oil sump container 10 so as to be along the inner surface of the oil sump container 10 while being spread, the bottom part is placed on the intermediate member 50, and the upper end part is the upper end of the side wall of the oil sump container 10. Fold it outward so that it crosses over.

  Next, the holding frame 70 is fitted to the upper end portion of the oil receiving container 80, and the bottom portion of the oil sump container 10 is fitted thereon. As the holding frame 70, a holding frame plate for stacking tin 18-liter cans can also be used. In this case, as shown in FIG. 2, if the intermediate wall 72 extends in a plate shape inside the upper side wall 71 and the lower side wall 73, a position corresponding to the discharge hole 14 is cut out to form an opening 74. As the oil receiving container 80, the same tin 18 liter can as the oil sump container 10 can be used, and in that case, the top wall is cut and removed (when there is a top wall).

  This edible oil filtration apparatus 1 can be used as follows. As described above, the used cooking oil is poured into the oil sump container 10 placed on the oil receiving container 80 and fitted with the filtration structure 20. The cooking oil can be put to the vicinity of the upper end of the oil reservoir 10. Adsorbent is added to cooking oil. The charging may be performed after the edible oil is poured into the oil sump container 10 or before that. As the adsorbent, silica (silicon dioxide) or activated clay, those obtained by adding an alkali component such as magnesium oxide, powdered activated carbon or the like can be used. And it stirs so that the input adsorbent may disperse | distribute well to cooking oil.

  The edible oil poured is filtered by the receiving filter sheet 60 and the discharge filter sheet 40 in the filter structure 20 shown in FIG. In this filtration structure 20, since the receiving filtration sheet 60 has an area covering the inner wall surface of the oil sump container 10, impurities such as oxides and contaminants in the edible oil, and the adsorbent that adsorbs these impurities, A large area of the receiving filter sheet 60 is dispersed and removed. As a result, the receiving filter sheet is prevented from being clogged.

  The edible oil filtered by the receiving filter sheet 60 flows on the discharge filter sheet 40 while the flow that has passed through the receiving filter sheet portion covering the entire side wall 12 is concentrated on the periphery of the bottom wall 12 of the oil reservoir 10. On the other hand, in the filtration structure 20, the intermediate member 50 is interposed between the receiving filtration sheet 60 and the discharge filtration sheet 40, and the horizontal portion 511 holds the peripheral edge of the discharge filtration sheet 40. Since the weight of the edible oil is also added to the holding force, it is reliably prevented that the discharge filtration sheet 40 is moved by the flow from the peripheral edge of the bottom wall to the central portion where the discharge hole 14 is located.

In the intermediate member 50, the cross wire 52 and the spiral wire 53 are supported by the standing portion 512 of the frame wire 51, and form a bridge portion 50 a that extends horizontally at a position higher than the horizontal portion 511. As a result, as shown in FIG. 6, the bottom portion of the receiving filter sheet 60 is supported by the bridge portion 50 a, and a large space corresponding to the upright portion 512 is formed between the receiving filter sheet 60 and the discharge filter sheet 40. Impurities and adsorbents in the edible oil that have passed through the receiving filter sheet reach the discharge filter sheet 40 and are removed after being dispersed in the large space. As a result, clogging of the discharged filtration sheet is reliably prevented. In order to obtain this effect, it is desirable to form the intermediate member 50 so that the height of the space is 2 to 100 mm. If this height is below the lower limit, the impurities in the edible oil that have passed through the receiving filter sheet are not sufficiently dispersed. On the other hand, even if the height exceeds the above upper limit, there is a disadvantage that the oil storage capacity of the oil sump container becomes small although the dispersion efficiency is not so high. In this respect, the height of the space is more preferably 3 to 50 mm.

  Moreover, when the discharge hole 14 is formed of a plurality of small holes provided in the bottom wall 11 as in this embodiment, the porous member 30 is a portion of the bottom wall 11 around the discharge filter sheet and the discharge hole. To prevent close contact. Thereby, the flow path through which the edible oil filtered by the discharge filter sheet 40 flows to the discharge hole 14 is secured.

  This flow path is reliably formed by the diameter of the wire constituting the net member and the gap between the wires by forming the porous member 30 from the net member. In addition, the porous member 30 may be a plate material provided with a large number of small holes like punching metal. In this case, it is desirable to secure a flow path along the plate material, for example, by making the plate material into a corrugated plate or bending a groove-like recess leading to a hole through which oil passes.

  The edible oil from which impurities have been removed by passing through the discharge filter sheet 40 falls through the discharge hole 14 and is stored in the oil receiving container 80.

  In this way, according to the edible oil filtration apparatus 1, fine impurities can be reliably removed using a powdery adsorbent, and the filter cloth 60 and the discharge filter sheet 40 are edible oils with adsorbent added. However, clogging is surely prevented. Thus, impurities can be filtered quickly with high efficiency. For example, in the case of a filtration apparatus using an 18 liter can, edible oil contained in a container is filtered in an amount of 70 to 80% in 1 to 2 hours. Subsequent filtration increases the rate at which the oil level is lowered through the impurities and adsorbent accumulated in the bottom of the container, which takes time, but 70 to 80% of the rapidly filtered edible oil Can be immediately used for the next use.

  In addition, the edible oil filtration device 1 can form the filtration structure 20 by simply placing the porous member 30, the discharge filtration sheet 40, the intermediate member 50, and the receiving filtration sheet 60 in this order in the oil sump container 10, and filtered. Since the reclaimed oil is dropped and stored in the lower oil receiving container 80, the entire structure is simple and can be manufactured at low cost.

  FIG. 7 shows an edible oil filtration apparatus 1A according to another embodiment of the present invention. This edible oil filtration device 1A can be used by being installed under the fryer A. The fryer A is provided with a cooking tank B for heating the stored cooking oil to a cooking temperature such as fried food, and the lower part has a space D between the leg parts C. The edible oil filtration apparatus 1 </ b> A includes an oil sump container 10 and an oil receiver container 80 having dimensions to be accommodated in the space D. Since the basic structure of the oil reservoir 10 and the oil receiving container 80 is the same as that of the edible oil filtration apparatus 1 shown in FIGS. 1 to 6, detailed description is omitted, and edible oil filtration in FIG. 7 is performed. The part corresponding to the device 1 is indicated by adding “A” to the end of the number of the edible oil filtration device 1.

  In this edible oil filtration apparatus 1A, the oil sump container 10 and the oil receiver container 80 are flat so that they are housed in the lower part of the fryer A. The oil sump container 10A has casters 91 at the lower ends of the leg portions 90 extending downward from the four corners, and the oil receiving container 80A has casters 92 at the four corners of the bottom so that each container can be easily put into and out of the space D. Yes. Further, a clamp member 95 having an inverted U-shaped cross section is fitted from above the portion of the receiving filter sheet on the side wall 12A, and the receiving filter sheet 60A is detached from the side wall 12A of the oil reservoir container 10A by the clamping force due to the elasticity of the clamp member 95. I am trying not to.

  This edible oil filtration apparatus 1A can also be used in the same manner as the edible oil filtration apparatus 1 described above, and in the same manner as described above, edible oil added with a powdery adsorbent is filtered with high efficiency while preventing clogging of the filter medium. can do.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to these, A various change is possible unless it deviates from the meaning. For example, the intermediate member constituting the filtration structure can include a plurality of wires arranged concentrically instead of the spiral wire. In addition, the bridge portion supported on the upright portion may be formed of a wire having a mesh structure that intersects at a right angle or a predetermined angle. Further, the intermediate member may be formed by providing a large number of small holes in the plate material, such as punching metal, instead of the wire member.

  The porous member and the intermediate member can have various shapes such as a polygon other than a rectangle as shown in the embodiment, and a circle. However, it is desirable that the intermediate member has a dimension that is inserted almost densely into the bottom of the oil sump container so that it does not easily move in the oil sump container.

  The drain hole of the oil reservoir can be provided not at the center of the bottom wall but at the peripheral edge or corner. Also in this case, it is desirable to provide the bottom wall with an inclination that descends toward the discharge. Alternatively, the discharge hole may be provided in the entire bottom wall.

  Even if the receiving filter sheet has a shape other than a bag-like one, various types of filter sheets such as one flat filter sheet are used as long as the receiving filter sheet has a size that covers the inner wall surface of the oil reservoir. be able to.

  When the oil sump container and the oil receiving container are formed of tin cans, small or large cans can be used in addition to 18 liter cans. In addition to the rectangular parallelepiped shape, both containers can have various shapes such as a cylindrical shape and a polygonal column shape.

1, 1A: Edible oil filtration device 10, 10A: Container 11, 11A: Bottom wall 12, 12A: Side wall 13: Opening 14, 14A: Discharge hole 20, 20A: Filtration structure 30: Porous member 40: Discharge filter sheet 50: Intermediate member 50a: Bridge portion 60, 60A: Receiving filter sheet 70: Holding frame 71: Upper side wall 72: Intermediate wall 73: Lower side wall 74: Opening 80, 80A: Oil receiving container

Claims (3)

An edible oil filtration device that filters edible oil added to a powdered adsorbent and drops regenerated oil in a lower oil receiving container and stores it.
An oil sump container having a bottom wall and a side wall, having an opening at an upper end, and having a discharge hole formed in the bottom wall;
A porous member placed on the bottom wall so as to cover the discharge hole;
A discharge filtration sheet having a size covering the bottom wall and placed so as to cover the porous member;
An intermediate member placed on the discharge filter sheet;
Having a size covering the inner wall surface of the oil sump container, comprising a receiving filtration sheet placed on the intermediate member and receiving edible oil after use;
The intermediate member includes: a rectangular frame wire having a horizontal portion that holds the vicinity of the peripheral edge of the discharge filtration sheet; and a plurality of upright portions that rise from the edge of the horizontal portion; It is constituted by two cross wires that extend so as to tie and are orthogonal to each other, and a spiral wire that extends spirally on the cross wire,
The cross wires and the spiral wire, forms a bridge portion for supporting the cross-shaped and has a plurality of openings between the wires extending helically, the bottom of the receiving filter sheet is supported on the end portion on the standing portion cooking oil filter apparatus characterized by you. An oil receiving container for receiving the oil discharged from the oil sump container, and a holding frame interposed between the oil sump container and the oil receiving container;
The holding frame has an opening at a position facing the discharge hole of the bottom wall of the oil sump container, and is fitted to a bottom part of the oil sump container and an upper end part of the oil sump container, The edible oil filtration device according to claim 1, wherein the oil sump container is held.   The oil sump container and the oil receiving container are containers having wall portions having the same shape, and the holding frame includes an upper side wall that fits outside a bottom part of the oil sump container, and an upper end opening of the oil receiving container. A lower side wall that fits inside, and an intermediate wall that connects the lower end of the upper side wall and the upper end of the lower side wall, and the intermediate wall is placed on the upper end of the oil receiving container. The edible oil filtration device according to claim 2.

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