JP2013252470A - Filter device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a filter device with which improvement in filtering efficiency and reduction in running cost are both achieved.SOLUTION: A filter device 10 includes: a first filter 1 comprising a plurality of entangled filter sheet materials in a ribbon shape or a noodle shape; an introducing port 15 for introducing a liquid which has to be filtered; and a discharging port 16 for discharging the liquid which has been filtered by the filter 1. Further, the filter device includes: a filter case 11 for storing a first filter 1; a lid member (closing means) 23 for closing the inside of the filter case substantially in an airtight state; and a hole 64 for passing the liquid to be filtered. The filer device also includes: a metallic filter cover 60 stored in the filter case 11 and covering the first filter 1; and a second filter 70 stored in the filter case 11 and covering the filter cover 60; wherein the second filter 70 is constituted of at least one of filtration paper, fabric and mesh sheet.

Description

  The present invention relates to a filtration device for filtering a liquid to be filtered.

  With increasing awareness of environmental issues in recent years, it is estimated that used cooking oil after fried foods such as fried food, tempura, cutlet, fried chicken, croquettes, and fries will reach 400,000 to 500,000 tons per year. However, the reality is that most of them are discarded as industrial waste.

  Filtration by filter permeation is generally used to remove impurities from liquids, but if used edible oil is filtered with a normal filter, the filter will be clogged and must be replaced frequently. Needed a lot of money. For this reason, it is the present situation that used cooking oil is hardly reused by filtering and reusing used cooking oil in restaurants and restaurants that handle fried foods as described above. This not only increases food costs but also wastes resources. Also, from the standpoint of economy, there are many cases where oil that has been oxidized and deteriorated by being used for deep-fried cooking continues to be used for deep-fried cooking. As a result, it is inferior in taste and good for health. However, it is necessary to provide food that cannot be said.

Japanese Patent No. 3733450

  Under such circumstances, Patent Document 1 proposes a filter in which a special sheet material obtained by mixing tourmaline powder and activated clay in a predetermined ratio is wound in a cylindrical shape. However, when using this filter to filter used edible oil, the used edible oil flowing from the upper end of the filtration device passes through the cylindrical filter over the axial length and is discharged from the lower end of the filtration device. (See FIG. 2), and clogging is likely to occur while passing through the filter. In addition, since a large amount of expensive special sheet material is required to create one filter, the filter also becomes expensive, and if this must be replaced frequently, the cost burden is large in small-scale stores. Furthermore, the filtration device becomes large and the filtration device is also expensive.

  This invention makes it a subject to provide the filtration apparatus which can make the improvement of filtration efficiency and reduction of running cost compatible.

  In order to solve this problem, the present invention provides a first filter in which a plurality of band-shaped or noodle-shaped filter sheet materials are intertwined, an inlet for introducing a liquid to be filtered, and a liquid after being filtered by the first filter. A filter case having a discharge port for discharging and containing the first filter; a closing means for closing the inside of the filter case in a substantially sealed state; and a hole for allowing the liquid to be filtered to pass therethrough and the filter case A metal filter cover that covers the first filter and a second filter that covers the filter cover, and the second filter includes filter paper, cloth, and mesh sheet. It is formed by at least one of these.

  The present invention is characterized in that, in the filtration device, the second filter has heat resistance and oil resistance.

  The present invention is characterized in that, in the filtration device, the second filter includes a base portion that covers a ceiling portion of the filter cover, and a stretchable portion that extends from a peripheral edge of the base portion.

  The present invention is characterized in that the filtration device has a circulation path and a circulation pump for circulating the filtered liquid discharged from the discharge port to the introduction port.

  According to the present invention, in the filtration apparatus, a storage tank for storing the liquid to be filtered is provided in the apparatus, the filtered liquid discharged from the discharge port is stored in the storage tank, and this is connected to the circulation pump. The circulation path is formed so as to continuously perform a process of inhaling and introducing into the apparatus through the introduction port and filtering with the first filter and the second filter.

  According to the present invention, in the filtration device, a storage tank for storing the liquid to be filtered is provided outside the device, and the filtered liquid discharged from the discharge port is stored in the storage tank, and this is connected to the circulation pump. The circulation path is formed so as to continuously perform a process of inhaling and introducing into the apparatus through the introduction port and filtering with the first filter and the second filter.

  The filtration device according to the present invention can achieve an effect that it is possible to achieve both improvement in filtration efficiency and reduction in running cost.

FIG. 1 is a cross-sectional view of a main part of the filtration device according to the first embodiment. FIG. 2-1 is a front view illustrating an example of a filtration device according to the first embodiment. FIG. 2-2 is a front view illustrating an example of the filtration device according to the first embodiment. FIG. 2-3 is a top view of the state excluding the frame illustrating an example of the filtration device according to the first embodiment. FIG. 2-4 is a front view of the panel unit illustrating an example of the filtration device according to the first embodiment. FIG. 3 is a perspective view illustrating an example of the first filter according to the first embodiment. FIG. 4 is a front view illustrating an example of the first filter according to the first embodiment. FIG. 5 is a plan view illustrating an example of the first filter according to the first embodiment. FIG. 6 is a plan view of a cut piece included in the first filter according to the first embodiment. FIG. 7 is a cross-sectional view taken along the line AA of FIG. FIG. 8 is an explanatory view showing a circular jig for manufacturing the first filter according to the first embodiment. FIG. 9 is a perspective view illustrating an example of the second filter according to the first embodiment. FIG. 10 is a cross-sectional view illustrating an example where the second filter according to the first embodiment covers the filter cover. FIG. 11 is a perspective view showing an example of the filter cover of FIG. FIG. 12 is an operation explanatory diagram of the filtration device according to the first embodiment. FIG. 13-1 is a front view illustrating an example of the filtration device according to the second embodiment. FIG. 13-2 is a front view of an example of the filtration device according to the second embodiment. FIG. 13C is a top view of the state excluding the frame illustrating an example of the filtration device according to the second embodiment. FIG. 13-4 is a front view of the panel unit illustrating an example of the filtration device according to the second embodiment. FIG. 14 is an operation explanatory diagram of the filtration device according to the second embodiment.

  The present invention is described in detail below with reference to examples.

Example 1
FIG. 1 is a cross-sectional view of a main part of the filtration device according to the first embodiment. FIG. 2-1 is a front view illustrating an example of a filtration device according to the first embodiment. FIG. 2-2 is a front view illustrating an example of the filtration device according to the first embodiment. FIG. 2-3 is a top view of the state excluding the frame illustrating an example of the filtration device according to the first embodiment. FIG. 2-4 is a front view of the panel unit illustrating an example of the filtration device according to the first embodiment. In FIG. 2-2 and FIG. 2-3, details of the panel portion are omitted.

  A filtration device 10 shown in FIG. 1 filters edible oil (filtered object) used when cooking various fried foods in a prepared food store or a restaurant with the first filter 1 and the second filter 70, and the edible oil. It removes fine impurities, moisture, etc. contained in the water. The filtration device 10 includes a first filter 1, a filter case 11, a lid member 23, a filter cover 60, and a second filter 70.

  The filter case 11 is formed so that the first filter 1, the filter cover 60, and the second filter 70 can be accommodated. The filter case 11 includes a main body 12 and an upper member 13 having substantially the same inner diameter and formed in a substantially cylindrical shape, and a bottom member 14 that substantially closes the open bottom portion of the main body 12. The main body 12 and the upper member 13 and the main body 12 and the bottom member 14 are integrally fixed by welding, and the whole is formed in a pan shape. In the upper part of the filter case 11, an inlet 15 for introducing oil to be filtered is opened sideways. Moreover, the discharge port 16 which discharges | emits the edible oil after a filtration process opens toward the center in the bottom member 14. As shown in FIG.

  The upper member 13 has a substantially U-shaped cross section, and has a lower side protruding edge 17 and an upper side protruding edge 18. The lower side protruding edge 17 serves as a locking portion for locking to the upper surface 36 a of the filter case box 36 when the filtration device 10 is accommodated in the filter case box 36. An inner surface side of the predetermined upper side protruding edge 18 is an upper protruding edge 19, and an annular groove (not indicated) for fitting an O-ring 20 is formed on the outer side. The opening of the upper member 13 can be closed by a lid member 23 (which constitutes the “closing means” of the present invention).

  Inside the bottom member 14, the FB 21 and the punching metal 22 are arranged in a state where the FB 21 and the punching metal 22 are respectively fitted in the step portions (not indicated), and the first filter 1 is provided on the upper surface 14 a of the bottom member 14 and the punching metal 22. It is done. The first filter 1 is locked in a state where the peripheral edge 3 integrated by press bonding is supported by the upper surface 14 a of the bottom member 14 and pressed from above by a filter cover 60 described later. Almost all of the portions where the strip-like or noodle-like cut pieces 2 are intertwined are placed on the punching metal 22. The first filter 1 in the unused state has the inner portion swelled on both the upper and lower surfaces of the first filter 1, but when incorporated in the filtration device 10, the peripheral edge 3 is the bottom as described above. Since the central portion is supported on the upper surface 14a of the material 14 and the central portion is placed on the punching metal 22, there is no bulging downward, and the state swelled substantially upward only as shown in FIG. Become.

  The filter retainer 24 includes a shaft 25, a knob 26 fixed to the upper end of the shaft 25, and a filter cover retainer 27 at the lower end of the shaft 25. The shaft 25 passes through a shaft insertion hole 23 a opened at the center of the lid member 23. The shaft 25 brings the filter cover holder 27 closer to the second filter 70 as the knob 26 is rotated in one direction. The shaft 25 moves the filter cover holder 27 away from the second filter 70 as the knob 26 is rotated in the other direction. The filter cover holder 27 presses the filter cover 60 and the second filter 70 toward the bottom member 14 from above. The first filter 1 is pressed toward the bottom member 14 by the filter cover 60 from above the peripheral edge 3.

  The first filter 1 is preferably pressed by the filter cover 60 after the outer diameter of the first filter 1 (the outer diameter of the peripheral edge 3) is made larger than the inner diameter of the main body 12 of the filter case 11. In this way, the edible oil to be filtered can be prevented from flowing from between the peripheral portion 3 of the first filter 1 and the bottom member 14 of the filter case 11 toward the discharge port 16, so that the filtration target can be reliably secured. Can be filtered.

  As shown in FIGS. 2-1 to 2-4, the filtration device 10 includes a filter case box 36 that houses the filter case 11 and an oil storage tank that can store a predetermined amount (for example, 20 liters) of edible oil. 37 is fixed on the frame 38. Support legs 39, 39 are fixed to the bottom of the frame 38, so that the filtration device 10 can be installed on the floor surface in a stable state. The filtration device 10 can be carried by a rear handle 40 provided on the rear side of the oil storage tank 37 of the frame 38 and a front handle 41 provided on the panel portion 53 of the filter case box 36. Reference numeral 55 denotes a fuse.

  The filtration device 10 introduces edible oil contained in the oil containing tank 37 into the filter case 11 through the introduction port 15, filters the oil through the first filter 1 in the filter case 11, and then discharges the oil from the discharge port 16. The series of filtration processes collected in the storage tank 37 is repeated, and the filter case box 36 and the filter case 11 together with various hoses and an oil storage tank 37 that form a circulation path for circulating cooking oil. A circulation pump for sucking the edible oil and feeding it into the inlet 15 is accommodated. The edible oil that has been filtered in the order of the second filter 70 and the first filter 1 passes through the punching metal 22 and the metal receiving FB 21 disposed below the edible oil, and passes through the outlet 16 as a cleaned edible oil. Discharged.

  FIG. 3 is a perspective view illustrating an example of the first filter according to the first embodiment. FIG. 4 is a front view illustrating an example of the first filter according to the first embodiment. FIG. 5 is a plan view illustrating an example of the first filter according to the first embodiment. FIG. 6 is a plan view of a cut piece included in the first filter according to the first embodiment. FIG. 7 is a cross-sectional view taken along the line AA of FIG. FIG. 8 is an explanatory view showing a circular jig for manufacturing the first filter according to the first embodiment.

  As shown in FIG. 3 to FIG. 5, the first filter 1 is made of a sheet material as disclosed in Patent Document 1 or a filter paper (filter material) that is commercially available from a predetermined length (for example, about 1.8 meters). For example, a circular cut shown in FIG. 8 is used by using a predetermined amount of cut pieces (filter sheet material) 2 cut into strips or noodles by straight cutting with a special cutting machine. It is pressed with the tool 4 to join and integrate only the peripheral edge portion 3 and molded into a predetermined size. Note that the filter paper may be cut as long as the filter paper can be cut into a strip shape. For example, a shredder machine may be used.

  In the present embodiment, as the material of the first filter 1, heat-resistant and oil-resistant filter paper using natural pulp (100% is preferable) is used. If the natural pulp is 100%, it is preferable because the processing of the first filter 1 after use becomes easy. In addition, the raw material of the 1st filter 1 is not limited to the thing of 100% of natural pulp, You may include adsorbent in consideration of filtration performance. As the adsorbent, for example, activated carbon, activated clay, or a mixture of activated carbon and activated clay can be used.

  As an example, 15 grams of cut pieces 2 cut into strips or noodles are used for each of the first filters 1 and placed in a circular jig 4 to press the peripheral edge 3 only by 1 cm to obtain an outer diameter. The first filter 1 may have a D1 of about 12 cm and an inner diameter D2 of about 10 cm. In addition, the dimension of the 1st filter 1 is not limited to this. The first filter 1 has only the peripheral edge 3 joined and integrated therein, and a large number of filtration passages are formed at random in a state where a large number of strips or noodle-shaped cut pieces 2 are entangled with each other. doing. As shown in FIG. 6, the cutting piece 2 has a rectangular shape. The longitudinal direction of the cut piece 2 is the length L of the cut piece 2, the direction perpendicular to the longitudinal direction is the width W of the cut piece 2, and the direction perpendicular to the surface of the cut piece 2 is the thickness t of the cut piece 2.

  As shown in FIG. 8, the circular jig 4 has a piston 4P and a cylinder 4S. The piston 4P is a cylindrical structure and has a recess 4PI. The cylinder 4S is a bottomed container, and the piston 4P enters the inside. When the first filter 1 is manufactured, a plurality of cut pieces 2 are filled in the cylinder 4S. Then, the piston 4P enters from the opening of the cylinder 4S (in the direction indicated by the arrow P in FIG. 8), and presses the cut piece 2 filled in the cylinder 4S. The cut piece 2 between the peripheral edge 4T of the piston 4P and the bottom 4SB of the cylinder 4S is compressed by the piston 4P and integrated into the peripheral edge 3 of the first filter 1. As shown in FIGS. 3 and 4, the peripheral edge portion 3 is a flange-like portion formed by pressing and solidifying a plurality of cut pieces 2 so as to be integrated into an annular shape and projecting toward the outside of the first filter 1.

  As shown in FIG. 4, the first filter 1 includes a first convex portion 2TA in which a plurality of cutting pieces 2 are entangled and a second convex portion 2TB in which a plurality of cutting pieces 2 are also entangled. The 1st convex part 2TA and 2nd convex part 2TB protrude from both surfaces of the peripheral part 3, respectively. 2nd convex part 2TB protrudes from the peripheral part 3 on the opposite side to 1st convex part 2TA. The piston 4P of the circular jig 4 described above has a recess 4PI, and when the plurality of cut pieces 2 are pressed by the piston 4P, most of the cut pieces 2 excluding the portion that becomes the peripheral portion 3 are: Enter into the recess 4PI. The cut piece 2 that enters the recess 4PI becomes the first convex portion 2TA of the first filter 1, and the cut piece 2 on the bottom 4SB side of the cylinder 4S becomes the second convex portion 2TB. During the pressing, the cut piece 2 on the cylinder 4S side is pressed against the bottom 4SB of the cylinder 4S. For this reason, the distance h1 from the peripheral part 3 to the top part of the 1st convex part 2TA becomes larger than the distance h2 from the peripheral part 3 to the top part of the 2nd convex part 2TB.

  Thus, as shown in FIG. 4, the first filter 1 has a shape in which two semicircles having different curvatures are combined and the flange-shaped peripheral edge portion 3 protrudes from the mating portion of both. Moreover, as shown in FIG. 5, the shape of the first filter 1 in plan view is a circle. However, the shape of the 1st filter 1 is not limited to this, The shape of the 1st filter 1 can be changed according to the specification etc. of the filtration apparatus 10 in which the 1st filter 1 is mounted. For example, the first filter 1 may have a polygonal shape such as a quadrangle or a hexagon in plan view.

  The first convex portion 2TA and the second convex portion 2TB are formed with the cut pieces 2 being hardly compressed by the press. For this reason, the density of the cut pieces 2 of the first convex portion 2TA and the second convex portion 2TB is lower than that of the peripheral edge portion 3. The density of the cut piece 2 is the mass of the cut piece per unit volume. With such a structure, the first filter 1 has a plurality of strip-like or noodle-like cuts in a state in which the first convex portion 2TA and the second convex portion 2TB are intertwined with each other. The gaps between the pieces 2 are formed, and the numerous gaps serve as numerous filtration passages.

  FIG. 9 is a perspective view illustrating an example of the second filter according to the first embodiment. As shown in FIG. 9, the 2nd filter 70 is formed in the shape which covers the filter cover 60 with the filtration member which has heat resistance and oil resistance. The filtering member includes, for example, a filter paper, a paper filter, a cloth, and a mesh sheet. The second filter 70 covers the first filter 1 by covering the filter cover 60. That is, the second filter 70 removes substances that become clogged with the first filter 1 from the liquid to be filtered with the first filter 1. In addition, the 2nd filter 70 may combine a multiple types of filtration member.

  In the example shown in FIG. 9, the second filter 70 uses a cover-like filter such as a commercial coffee filter. The second filter 70 has a base 71 and an expansion / contraction part 72. The base 71 is formed in a substantially disc shape. The base 71 covers a ceiling 61 of the filter cover 60 described later. The stretchable part 72 is formed in a taper shape from the peripheral part of the base part 71. The stretchable portion 72 has a plurality of peak portions 72a and valley portions 72b alternately. When the second filter 70 is accommodated in the filter case 11, the adjacent peak portions 72 a approach each other, or the peak portion 72 a and the valley portion 72 b are deformed, so that the inner surface of the case main body 12 of the filter case 11 is deformed. It is accommodated between the filter cover 60. As described above, since the second filter 70 has the expansion / contraction part 72, it is possible to facilitate attachment to the filter cover 60. When the second filter 70 covers the filter cover 60, the second filter 70 is accommodated in the filter case 11 while being pressed against the filter cover 60 by the filter cover presser 27 described above. Thus, by using a commercially available filter as the second filter 70, the running cost can be reduced.

  In the example illustrated in FIG. 9, the base 71 of the second filter 70 is described as having the same shape as the ceiling 61 of the filter cover 60, but may have a different shape. For example, the base 71 of the second filter 70 may be a filter having a conical shape, an arc shape, or the like.

  FIG. 10 is a cross-sectional view illustrating an example where the second filter according to the first embodiment covers the filter cover. FIG. 11 is a perspective view showing an example of the filter cover of FIG. As shown in FIGS. 10 and 11, the filter cover 60 is formed in a cylindrical shape by a metal net. The metal net includes a metal net of about 80 mesh to 180 mesh, for example. The filter cover 60 includes a ceiling portion 61, a side portion 62 erected from the periphery of the ceiling portion 61, and an opening 63 that is connected to the side portion 62 and faces the ceiling portion 61. A plurality of holes 64 are formed in the ceiling portion 61 and the side portion 62. The filter cover 60 is manufactured by, for example, combining metal nets by welding or the like. When the filter cover 60 is covered with the second filter 70, the filter cover 60 supports the second filter 70. Thereby, the filter cover 60 can suppress the deformation | transformation of the 2nd filter 70 by the pressure of edible oil at the time of filtration.

  Thus, the filtration apparatus 10 removes impurities having relatively large dimensions from the edible oil in the process of the edible oil passing through the second filter 70 during filtration. Then, the edible oil that has passed through the second filter 70 passes through the hole 64 of the filter cover 60 and is guided to the first filter 1. Thus, by covering the 1st filter 1 with the filter cover 60 and the 2nd filter 70, since the impurity with a big dimension can be previously removed with the 2nd filter 70, clogging of the 1st filter 1 can be suppressed. As a result of this action, the filtering device 10 can extend the period during which the first filter 1 can be used by the second filter 70. Furthermore, since the second filter 70 only covers the filter cover 60, it can be easily replaced. Therefore, in the filtration apparatus 10, since an expensive filter can be used for a long period of time by using an expensive filter for the first filter 1 and an inexpensive filter for the second filter 70, the running cost can be reduced and filtration can be performed. Efficiency can be improved. Accordingly, the filtration device 10 can be introduced even in a small-scale store, etc., and the amount of used food oil that has been disposed of in large quantities can be greatly reduced, thereby saving energy and solving environmental problems. The effect that can contribute is obtained.

  FIG. 12 is an operation explanatory diagram of the filtration device according to the first embodiment. As shown in FIG. 12, the edible oil after filtration discharged from the discharge port 16 of the filter case 11 of the filtration device 10 passes through the discharge hose 42 connected to the discharge port 16 and the discharge port 43 shown in FIG. And collected in the oil storage tank 37. The edible oil in the oil storage tank 37 is sucked into the circulation pump 46 through the suction hose 45 connected to the discharge port at the bottom, and is introduced into the filter case 11 from the introduction port 15 through the introduction hose 47. The filtration device 10 filters the edible oil introduced into the filter case 11 with the second filter 70, passes the edible oil through the hole 64 of the filter cover 60, and guides it to the first filter 1. Process. The circulation pump 46 receives electric power supplied via the power cord 48 shown in FIG. 2 and is continuously driven for a time set by the timer switch 49. The capacity | capacitance of the circulation pump 46 is 3 liters / min under AC100V * 200W as an example. Although the discharge hose 50 branches off from the suction hose 45, the edible oil after filtration does not flow into the discharge hose 50 because the cock 51 is always closed during the filtration process. The pressure gauge 52 provided in the introduction hose 47 measures the pressure when edible oil flows through the introduction hose 47. The operation part of the timer switch 49 and the display part of the pressure gauge 52 are provided on the panel part 53 in front of the upper surface of the filter case box 36 shown in FIG.

  Next, the usage and operation of the filtration device 10 will be described with reference to FIGS. 1 and 2. The first filter 1, the filter cover 60, and the second filter 70 are sequentially set in the filter case 11 to which the lid member 23 is not attached, and these are attached to the filter case box 36. A housing hole (not shown) having an inner diameter substantially equal to the outer diameter of the filter case body 12 is formed in the upper surface 36a of the filter case box 36, and the filter case body 12 is fitted into this hole from above, The filter case 11 is attached to the filter case box 36 by locking the lower side protruding edge 17 of the member 13 to the upper surface 36a of the filter case box 36 around the hole.

  After the filter case 11 is attached to the filter case box 36 in this way, the lid member 23 is attached to close the filter case 11 in a sealed state, and the first filter 1 and the filter cover are closed by the filter cover holder 27 of the filter holder 24. 60 and the second filter 70 are held stationary. More specifically, the upper protruding edge 19 of the upper member 13 of the filter case 11 is accommodated in the lower peripheral edge of the lid member 23 after the O-ring 20 is fitted in the annular groove of the upper member 13 of the filter case. Then, the lid member 23 is attached to the upper member 13. When the knob 26 is rotated to one side from this state, the lid member 23 is brought into close contact with the upper member 13 to close the inside of the filter case 11 in a sealed state, and the filter cover holder 27 is connected to the first filter 1, the filter cover 60 and the first cover. 2 Hold down the filter 70 and keep it stationary.

  Further, in FIG. 2, the clamp 54 is attached to the outer peripheral portion (between the lower side protruding edge 17 and the upper side protruding edge 18) of the upper member 13 of the filter case 11 attached to the filter case box 36 in this way. By tightening, the filter case 11 is completely sealed and can be maintained for a long time.

  Since the preliminary preparation of the filtration device 10 is completed as described above, the edible oil to be filtered by the filtration device 10 (the edible oil after being used for frying cooking for a long time with a fryer or the like) is put in the oil storage tank 37, Power is supplied to the filtration device 10 via the power cord 48. In addition, when putting edible oil into the oil storage tank 37, it is good to remove large impurities, such as oil cake, using a filter net etc. beforehand. Next, when the operation time of the filtration device 10 is appropriately set by the timer switch 49, the operation lamp 56 is turned on to notify that the filtration device 10 is in operation, and the circulation pump 46 is started to start the filtration process. Is done. The filtration process is as described above, and the edible oil in the oil storage tank 37 is sucked by the circulation pump 46 through the suction hose 45, and this is sucked from the inlet 15 through the inlet hose 47 into the filter case 11. The edible oil after being filtered by the filter 1 is collected in the oil storage tank 37 from the discharge port 16 through the discharge hose 42, and the filtration process of the cycle is continued for the time set by the timer switch 49. It is what you do. When the pressure gauge 52 shows an abnormal value due to clogging of the filter 1 or the like, the timer switch 49 is returned to 0 and the filtration device 10 is stopped.

  In this way, after removing fine impurities and moisture contained in the edible oil by continuous filtration for a predetermined time, when the cock 51 is opened, the edible oil in the oil storage tank 37 branches from the suction hose 45. To 50. Further, an air discharge port 57 branched from the discharge hose 42 connected to the discharge port 16 of the filter case 11 is opened at the front of the apparatus, and the air vent cock 58 that is closed during the filtration process is opened after the filtration process is completed. As a result, air escapes from the air discharge port 57, and edible oil remaining in the discharge hose 42 can be discharged from the discharge hose 50.

  During use, the first filter 1 is crushed by the second convex portion 2TB shown in FIG. 4, and the surface thereof is substantially flush with the surface of the peripheral edge portion 3 on the second convex portion 2TB side. When the first filter 1 after use is observed, an inner portion of the plate-like peripheral portion 3 is formed inside the peripheral portion 3. In the crushed plate-shaped inner portion, the density of the cut pieces 2 is higher than that of the first convex portion 2TA.

  The first filter 1 is attached to the filtration device 10 and a plate-shaped inner portion is formed after a certain amount of time has elapsed since the filtration of the object to be filtered (edible oil in this embodiment) has started. The edible oil introduced into the filter case 11 from the inlet 15 of the filtration device 10 is first fried mainly in the process of passing through the gaps of the plurality of cut pieces 2 constituting the first convex portion 2TA of the first filter 1. Impurities having a certain size such as wrinkles are removed in the cut pieces 2. And the edible oil which passed 1st convex part 2TA is a process which passes the inner part where the density of the cutting piece 2 is higher than 1st convex part 2TA, and the fine impurity which could not be removed by 1st convex part 2TA is contained. Adsorbed and removed. Even when the edible oil passes through the first convex portion 2TA, some fine impurities are adsorbed by the cut pieces 2.

  Thus, the 1st filter 1 uses the 1st convex part 2TA in which the cutting piece 2 was entangled, and the inner part where the density of the cutting piece 2 is higher than the 1st convex part 2TA, and edible oil in this order in two steps Filter. As a result, the first filter 1 can efficiently filter edible oil. Since the 1st filter 1 can remove efficiently the fine impurity which causes oxidation from the edible oil used for the fried food, the lifetime of edible oil can be extended. In addition, the first filter 1 can efficiently remove fine impurities from the edible oil and leave the umami component in the edible oil, so that the taste of the fried food is reduced by the edible oil having the umami component while suppressing the oxidation of the edible oil. It also has the advantage of improving.

  Moreover, since the 1st filter 1 is filtered using the two parts from which the density of the cutting piece 2 differed, it is few compared with the filter which wound the sheet | seat raw material in the patent document 1, and was wound. The same or better filtration performance can be achieved with the material. As a result, the first filter 1 can be manufactured with a small amount of material and with a filtration performance equivalent to or better than a filter obtained by winding a sheet material into a cylindrical shape, so that the material cost can be reduced and the environmental load can also be reduced. Further, the first filter 1 can be manufactured with less material than a filter in which a sheet material is wound in a cylindrical shape, so that the first filter 1 can be downsized. For this reason, the filtration apparatus 10 using the 1st filter 1 can be reduced in size compared with the filtration apparatus using the filter which wound the sheet | seat raw material in the cylindrical form.

  Furthermore, the 1st filter 1 has the 1st convex part 2TA where the cutting piece 2 was entangled, and the 2nd convex part 2TB is compressed and the inner part is formed. With such a structure, the first filter 1 has a lower pressure loss than a filter in which a sheet material is wound in a cylindrical shape. For this reason, since the motive power of the circulation pump 46 which sends edible oil to the 1st filter 1 can be made small, the motive power source of the circulation pump 46 can be made into a small thing of a small output. As a result, the first filter 1 can realize downsizing of the filtration device 10 and reduction of energy consumption.

  Next, it demonstrates, referring Table 1 which shows the experimental result of the reference filtration apparatus which used only the 1st filter 1 mentioned above, and the filtration apparatus 10 of Example 1 mentioned above. The reference filtering device has the same basic configuration as that of the filtering device 10 shown in FIG. 12, but only the configuration of the filter accommodated in the filter case 11 is different. The first filter 1 has an outer diameter D1 including the peripheral portion 3 of about 12 cm, and an inner diameter of a portion where a large number of strip-shaped or noodle-shaped cut pieces 2 are intertwined inside the peripheral portion 3. A D2 having a size of about 10 cm was used.

  Table 1 shows the number of first filters used, the number of second filters used, the pressure at the end when each of the reference filtering device and the filtering device 10 filters 20 liters of edible oil containing 100 grams of flour, The filtration time and filtration performance are shown. The end pressure indicates the pressure at the end of filtration measured by the pressure gauge 52. The filtration time indicates the time required for filtration of 20 liters of edible oil. The filtration performance indicates the performance of the filtered edible oil.

  The reference filtering device is different from the filtering device 10 in that only the first filter 1 described above is accommodated in the filter case 11 and the filter cover 60 and the second filter 70 are not accommodated. For this reason, the reference filtering device filters the edible oil introduced into the filter case 11 using only the first filter 1. On the other hand, the filtration device 10 is different from the reference filtration device in that the filtration process is performed by the first filter 1 and the second filter 70 as described above. And as shown in Table 1, in order to filter 20 liters of edible oil, the reference | standard filter apparatus required the three 1st filters 1. FIG. On the other hand, the filtration device 10 was able to perform filtration with one first filter 1 and one second filter 70.

  In the reference filtering device, the first two of the three first filters 1 were stopped at a pressure of 0.9 [MPa] due to clogging, so the first filter 1 had to be replaced twice. It was. And the pressure at the time of completion | finish of filtration using the 3rd 1st filter 1 was 0.2 [MPa]. In contrast, the filtration device 10 did not require replacement of the first filter 1 and the second filter 70, and the pressure at the end of filtration was 0.65 [MPa]. That is, the filtration device 10 has completed the filtration of 20 liters of edible oil before the first filter 1 is clogged.

  And the filtration apparatus for reference was 13 minutes in filtration time including the replacement | exchange time of 2 times of the 1st filter 1. FIG. In addition, when replacing | exchanging the 1st filter 1 in the middle of filtration, it is necessary to extract cooking oil from the filter case 11. FIG. Therefore, the filtration time corresponding to the reference filtration device includes the time required for filter replacement and oil removal. On the other hand, since the filtration device 10 did not require replacement of the first filter 1, the filtration time was 4 minutes and 40 seconds. Thus, the filtration apparatus 10 has confirmed that filtration time was shortened rather than the reference filtration apparatus. Further, it was confirmed that the filtration performance was good with no difference in both the reference filtration device and the filtration device 10 of Example 1. Good filtration performance means that there is no problem even if the filtered edible oil is reused.

  The above filtration device 10 has a structure in which the second filter 70 can remove substances that clog the first filter 1 even when the first filter 1 having excellent filtration efficiency is used. Therefore, the filtration device 10 does not need to replace the first filter 1 frequently, and can reduce the running cost without degrading the filtration performance of the first filter 1. Moreover, since the frequency of filter replacement | exchange is less than the reference filtration apparatus, the filtration apparatus 10 can contribute to the improvement of usability. And when the filtration performance of the filtration apparatus 10 falls, since only the 2nd filter 70, such as a filter paper, a paper filter, cloth, a mesh sheet, should be replaced | exchanged first, it can aim at the further reduction of running cost. it can. Therefore, it is possible to provide a filtration device that can simultaneously improve the filtration efficiency and reduce the running cost. Further, the filtration device 10 according to the present invention is simple in configuration, is small and lightweight, and has a great economic merit when introduced in a small-scale store or the like. For this reason, it is expected that the spread will be promoted in small stores such as prepared dishes and restaurants that cook various fried foods. Therefore, by introducing the filtration device 10 according to the present invention, it is possible to significantly reduce the amount of used food oil that has been disposed of in large quantities so far, which contributes to energy saving and environmental problem solving. The effect that can be obtained.

  Although the example which used the filtration apparatus 10 for filtration of edible oil was demonstrated in the present Example, the object which the filtration apparatus 10 can use is not limited to this. The filtration apparatus 10 can be used for filtration of various uses, such as filtration of machine oil and soup of oden and boiled food (same in the following examples).

(Example 2)
FIG. 13-1 is a front view illustrating an example of the filtration device according to the second embodiment. FIG. 13-2 is a front view of an example of the filtration device according to the second embodiment. FIG. 13C is a top view of the state excluding the frame illustrating an example of the filtration device according to the second embodiment. FIG. 13-4 is a front view of the panel unit illustrating an example of the filtration device according to the second embodiment. FIG. 14 is an operation explanatory diagram of the filtration device according to the second embodiment. The embodiment 1 described in detail above is a batch type in which edible oil deteriorated by fried cooking with a fryer or the like is filtered with a filtering device 10 for a predetermined time to remove fine impurities, moisture, etc., and then returned to the fryer for reuse. In the present invention, the edible oil in the fryer is pumped and introduced into the filtration device of the present invention, which is filtered in the device and then returned to the fryer. It is also possible to construct as an embodiment. The configuration of the filtration device 10 in the case of this embodiment may be substantially the same as the filtration device 10 of Example 1, but the edible oil in the fryer is directly introduced into the filtration device 10 and the filtration process is performed. The oil storage tank 37 is not necessary. Therefore, the filtration device 10 according to this embodiment can be further reduced in size and weight.

  The usage and operation of the filtration device 10 will be described with reference to FIGS. 13 and 14. The filtration device 10 is prepared in the same manner as described in the first embodiment, and the discharge hose 42 connected to the discharge port 16 of the filter case 11 is placed in the fryer 59, and the filter net 80 installed in the fryer 59 is used. And a suction hose 45 is connected between the pump 46 and the circulation pump 46. Since other configurations are the same as those in the first embodiment, description thereof is omitted.

  In this state, when power is supplied to the filtration device 10 via the power cord 48 and the operation time of the filtration device 10 is appropriately set by the timer switch 49, the operation lamp 56 is lit and the filtration device 10 is in operation. At the same time, the circulation pump 46 is started and the filtration process is started. That is, the filtering device 10 filters the edible oil in the fryer 59 and removes large impurities such as oil residue contained in the edible oil while passing through the mesh 80, and then sucks it with the circulation pump 46 through the suction hose 45. Then, this is introduced into the filter case 11 from the introduction port 15 via the introduction hose 47. The filtration device 10 filters the edible oil introduced into the filter case 11 with the second filter 70, passes the edible oil through the hole 64 of the filter cover 60, and guides it to the first filter 1. Process. Then, the filtration device 10 returns the edible oil after being filtered by the first filter 1 from the discharge port 16 to the fryer 59 via the discharge hose 42. The filtration device 10 continuously performs such a cycle of filtration for the time set by the timer switch 49. Continuous operation may be performed without setting a timer, or filtration may be performed in conjunction with the operation of the flyer 59. As in the case of the first embodiment, when the pressure gauge 52 shows an abnormal value due to clogging of the first filter 1, the timer switch 49 is returned to 0 to stop the filtration device 10.

  According to this embodiment, edible oil can be filtered while fried cooking by the fryer 59, so there is no need to interrupt fried cooking, and fried cooking is always performed with clean edible oil from which impurities and moisture have been removed. There are advantages that can be made.

  Even if the filtration device 10 is configured in this way, the configuration in the filter case 11 is the same as that of the first embodiment, and therefore, during filtration, the size of the edible oil is relatively large in the process of passing through the second filter 70. Impurities can be removed from the edible oil. Therefore, the filtration device 10 can suppress the clogging of the first filter 1, and the filter cover 60 can suppress the deformation of the second filter 70 due to the pressure of edible oil during filtration. As a result of these actions, the filtration device 10 of the second embodiment can obtain the same actions and effects as those of the first embodiment.

1 1st filter 2 Band-like or noodle-like filtration sheet material (cutting piece)
3 peripheral edge 4 circular jig 10 filter device 11 filter case 12 filter case main body 13 filter case upper member 14 filter case bottom member 15 inlet port 16 outlet port 17 lower side protruding edge 18 of upper member upper portion of upper member Side protrusion edge 19 Upper protrusion edge of upper member 20 O-ring 21 FB
22 Punching metal 23 Lid member (closing means)
24 Filter holder 25 Shaft 26 Knob 27 Filter cover holder 36 Filter case box 37 Oil storage tank 38 Frame 39 Support leg 40 Rear handle 41 Front handle 42 Discharge hose (circulation path)
43 Discharge port 45 Suction hose (circulation path)
46 Circulation pump 47 Introduction hose (circulation path)
48 Power cord 49 Timer switch 50 Discharge hose 51 Cock 52 Pressure gauge 53 Panel part 54 Clamp 55 Fuse 56 Operation lamp 57 Air discharge port 58 Air vent cock 59 Flyer 60 Filter cover 64 Hole 70 Second filter 71 Base 72 Extendable part

Claims (6)

A first filter in which a plurality of strip-like or noodle-like filtration sheet materials are intertwined;
A filter case having an inlet for introducing the liquid to be filtered and an outlet for discharging the liquid after being filtered by the first filter, and containing the first filter;
Closing means for closing the inside of the filter case in a substantially sealed state;
A metal filter cover having a hole through which the liquid to be filtered passes and accommodated in the filter case and covering the first filter;
A second filter housed in the filter case and covering the filter cover;
Have
The second filter is formed of at least one of filter paper, cloth, and mesh sheet.   The filtration device according to claim 1, wherein the second filter has heat resistance and oil resistance.   3. The filtration device according to claim 1, wherein the second filter includes a base portion that covers a ceiling portion of the filter cover, and a stretchable portion that extends from a peripheral edge of the base portion.   The filtration apparatus according to any one of claims 1 to 3, further comprising a circulation path and a circulation pump for circulating the filtered liquid discharged from the discharge port to the introduction port.   A storage tank for storing the liquid to be filtered is provided in the apparatus, and the filtered liquid discharged from the discharge port is stored in the storage tank, which is sucked by the circulation pump and is supplied from the inlet to the apparatus. The filtration apparatus according to claim 4, wherein the circulation path is formed so as to continuously perform the process of being introduced into the first filter and being filtered by the first filter and the second filter.   A storage tank for storing the liquid to be filtered is provided outside the apparatus, and the filtered liquid discharged from the discharge port is stored in the storage tank, which is sucked by the circulation pump and is supplied from the inlet to the apparatus. The filtration apparatus according to claim 4, wherein the circulation path is formed so as to continuously perform the process of being introduced into the first filter and being filtered by the first filter and the second filter.