JP4366084B2 - Kitchen filter - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is a kind of filtering of exhaust gas such as smoke or steam containing a large amount of oil like a Chinese restaurant or steak house, and filtering exhaust gas such as smoke or steam not containing much oil like a Japanese restaurant. The present invention relates to a kitchen filter that can be performed.
[0002]
[Prior art]
An example of this type of kitchen filter is disclosed in Patent Document 1 (see FIG. 9). This conventional kitchen filter (1) includes a frame (2), a punching metal (3) that is fitted into the frame (2) and forms one surface, and a frame (2) that is fitted into the other. The porous filter plate (4) constituting the surface, the metal wire mesh (5) laid along the inner surface of the porous filter plate (4), and between the punching metal (3) and the metal wire mesh (5) It is comprised with the arrange | positioned corrugated wire mesh (6).
[0003]
When exhausting smoke containing a large amount of oil, the kitchen filter (1) is attached to the exhaust port of the kitchen with the punching metal (3) facing indoors. When smoke rising from the kitchen passes through the kitchen filter (1), most of the oil contained in the smoke is filtered through a fine metal mesh (5) with a mesh, and then the metal mesh (5). The remaining oil that has not been filtered is filtered by the porous filter plate (4), and is discharged into the atmosphere as clean exhaust.
[0004]
On the other hand, when exhausting only smoke or steam that does not contain much oil, the kitchen filter (1) is attached to the exhaust port of the kitchen with the porous filter plate (4) facing the room. In this case, a small amount of oil or vapor contained in the smoke is filtered by the porous filter plate (4) having finely intricate pores, and is discharged into the atmosphere as clean exhaust.
[0005]
[Patent Document 1]
JP 2002-336618 A (FIG. 3)
[0006]
[Problems to be solved by the invention]
However, as described above, when the smoke is exhausted with the punching metal (3) facing the indoor side, most of the oil contained in the smoke is filtered through the metal wire mesh (5) as described above. However, the mesh of the metal mesh (5) is very fine, so dust in the air adheres to the oil that has been filtered and adhered to the metal mesh (5), forming a dango shape on the metal mesh (5). It will clog as soon as it hardens. For this reason, the filtration efficiency of the kitchen filter (1) is reduced, and there is a problem that one type of kitchen filter cannot cope with it.
[0007]
Therefore, the object of the present invention is to be able to perform one type of exhaust of smoke containing a large amount of oil and one of exhaust of smoke that does not contain much oil, and the filtration efficiency immediately decreases due to clogging or the like. It is an object of the present invention to provide a kitchen filter that does not have any problem.
[0008]
[Means for Solving the Problems]
According to the first aspect of the present invention, “a frame (12) installed at an exhaust port of a kitchen, a punching metal (14) fitted into the frame (12) and constituting one surface, a frame (12)” The porous filter plate (16) that is fitted into the punching metal (14) and the porous filter plate (16) between the punching metal (14) and the porous filter plate (16) constituting the other surface is arranged in layers. a plurality of demister wire mesh formed by causing fine wire woven into a Jo a (18a) a plurality of layers superimposed (18) is arranged between the demister wire mesh (18) porous filter plate (16), demister formed by weaving wire mesh (18) metal wire mesh (20) having a smaller mesh than, and a thick stainless wire with a coarse vertically and horizontally mesh, disposed between the plurality of demister wire mesh (18) A kitchen filter (10) ", characterized in that it comprises a metal net (24) for oil recovery guiding oil that is collected at the lower end in demister wire mesh (18).
[0009]
In this invention, the demister wire mesh (18) is disposed on the back of the punching metal (14) constituting one surface of the kitchen filter (10), and the demister wire mesh (18) and the kitchen filter (10) are arranged. Since the metal wire mesh (20) is arranged between the porous filter plate (16) constituting the other side, the kitchen filter (10) is arranged with the punching metal (14) facing the indoor side. If so, most of the large amount of oil contained in the smoke (30a) is filtered by the demister wire mesh (18), and the remaining oil that has not been filtered is filtered by the metal wire mesh (20) or the porous filter plate (16). It will be filtered. Therefore, the smoke that has passed through the kitchen filter (10) is released into the atmosphere as clean exhaust (30b) that contains almost no oil. On the other hand, since the other surface of the kitchen filter (10) is composed of the porous filter plate (16), if the porous filter plate (16) is arranged indoors, the smoke does not contain much oil. (30a) is filtered by the porous filter plate (16), and the smoke passing through the kitchen filter (10) is released to the atmosphere as clean exhaust (30b) containing almost no oil as described above. Therefore, smoke exhaust including a large amount of oil and smoke exhaust not including much oil can be performed by one type of kitchen filter (10).
[0010]
Further, the demister wire mesh (18) is formed into a rough nonwoven fabric by laminating a plurality of thin wire rods (18a) knitted into a net shape by flat knitting, for example, so that the inside of the demister wire mesh (18) A large number of voids (18b) having a large diameter are formed. Therefore, even if dust in the air adheres to the oil and becomes dangulated and hardened on the wire rod (18a) of the demister wire mesh (18), the large-diameter gap (18b) is not completely blocked. The filtration efficiency does not decrease. Further, the smoke (30a) trying to pass through the demister wire mesh (18) passes while diffusing through the void (18b) stretched around the demister wire mesh (18), It takes a long time for the oil contained in the smoke (30a) to pass through the demister wire mesh (18), and the filtration efficiency can be improved.
[0011]
Furthermore, since the oil component filtered by the demister wire mesh (18) grows into droplets, and can eventually flow down along the wire (18a) by its own weight, the demister wire mesh (18) has a certain gap. Can keep rate. Therefore, the filtration efficiency of the kitchen filter (10) does not decrease due to clogging or the like.
[0015]
Furthermore, since the oil recovery wire mesh (24) is disposed between the plurality of demister wire meshes (18), the oil component filtered by the demister wire mesh (18) is transmitted to the oil recovery wire mesh (24). It will flow down quickly and be guided to its lower end. Therefore, since the demister wire mesh (18) can maintain a certain porosity, the filtration efficiency can be maintained over a long period of time.
[0016]
Claim 2 limits the demister wire mesh (18) in the kitchen filter (10) according to claim 1 , "The demister wire mesh (18) has a cross section in the width direction formed in a substantially bellows shape. It is characterized by that.
[0017]
According to this invention, since the cross-sectional shape in the width direction of the demister wire mesh (18) is formed in a substantially bellows shape, the contact area with the smoke (30a) rising from the kitchen can be increased, and the smoke (30a ) Can improve the filtration efficiency of the oil content.
[0018]
Claim 3 is disposed between the in the filter (10) for kitchen according to claim 1 or 2 "metal wire mesh (20) porous filter plate (16), a metal wire mesh (20) and porous It further comprises an adhesion preventing wire mesh (22) having a small contact area with the filter plate (16) and provided with irregularities on the surface ".
[0019]
According to the present invention, an appropriate space is formed between the porous filter plate (16) and the metal wire mesh (20) due to the presence of the adhesion preventing wire mesh (22). Therefore, when the porous filter plate (16) and the metal wire mesh (20) are in close contact, the through holes (16a) of the porous filter plate (16) and the small mesh of the metal wire mesh (20) are blocked. This can prevent the reduction of the filtration efficiency.
[0020]
According to a fourth aspect of the present invention, there is provided a drain discharge structure for a kitchen filter (10) according to any one of the first to third aspects, wherein a drain discharge hole (28) is formed in the lower surface of the frame (12). It is characterized by.
[0021]
According to the present invention, since the oil accumulated in the kitchen filter (10) can be discharged from the drain discharge hole (28), the porous filter plate (16) and the demister wire mesh (18) have a constant porosity. And the replacement period of the kitchen filter (10) can be extended.
[0022]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail according to illustrated embodiments. 1-4, the kitchen filter (10) is installed at a kitchen exhaust port (for example, a suction port of a smoke exhaust duct) (not shown), and smoke generated in the kitchen (30a). It is for removing oil, steam, dust, etc. from the frame (12), punching metal (14), porous filter plate (16), demister wire mesh (18), metal wire mesh (20) Has been.
[0023]
The frame (12) is formed by assembling a stainless steel plate having a U-shaped cross section into a rectangular frame shape, and can be attached to an exhaust port of a kitchen (not shown). The upper frame bar (12a) of the frame (12) is detachable from the side frame bar (12b), and the upper frame bar (12a) is screwed to the side frame bar (12b). It is supposed to be fixed. In addition, a plurality (six in this embodiment) of drain discharge holes (28) are formed in each edge portion of the lower surface of the lower frame bar (12c), and the inside of the kitchen filter (10) is provided. The oil accumulated in the water can be discharged from the drain discharge hole (28).
[0024]
The frame (12) includes a punching metal (14) constituting one surface of the frame (12), a porous filter plate (16) constituting the other surface of the frame (12), a punching The demister wire mesh (18) disposed on the punching metal side between the metal (14) and the porous filter plate (16) (that is, the back of the punching metal (14)), and the demister wire mesh (18) and the porous filter A metal wire mesh (20) disposed between the plate (16) is fitted.
[0025]
The punching metal (14) is a flat plate member made of a metal such as stainless steel, and a large number of large-diameter through holes (14a) are formed on the surface so that smoke (30a) can easily pass therethrough. .
[0026]
The porous filter plate (16) is formed of, for example, a porous plate-like member formed by sintering stainless steel particles, nickel particles, or fibers thereof. The porous filter plate (16) has innumerable fine holes with a very uneven shape (16a) formed throughout, and smoke (30a) passes through the porous filter plate (16). Then, water vapor and oil contained in the smoke (30a) are accumulated in the through hole (16a).
[0027]
Demister wire mesh (18) is for filtering oil and dust with relatively large particle size contained in smoke (30a), and multiple layers of thin wire rod (18a) knitted into a net shape with flat knitting. When combined, it is formed into a rough nonwoven fabric. As a result, innumerable voids (18b) having a relatively large diameter are formed in the interior of the demister wire net (18) in the form of a net. In this example, a thin wire rod (18a) is formed into a net shape by flat knitting, and a demister wire mesh (18) is formed by overlapping a plurality of layers, but is not necessarily limited to this. Alternatively, any knitting method may be used as long as the voids (18b) are formed in a mesh shape inside the demister wire mesh (18).
[0028]
The cross section in the width direction of the demister wire mesh (18) is formed in a substantially bellows shape in order to increase the surface area and increase the filtration efficiency. In the present embodiment, the cross-sectional shape of the demister wire mesh (18) in the width direction is formed in a bellows shape, but the cross-sectional shape is not necessarily limited to this, and for example, a corrugated shape is used. Alternatively, a linear cross-sectional shape may be used.
[0029]
The metal wire mesh (20) is used to filter oil that could not be filtered by the demister wire mesh (18), and to block the flame that tries to pass through the kitchen filter (10). (20a) is formed by a thin plate-like member having a hole. The mesh of the metal wire mesh (20) is set smaller than the mesh of the demister wire mesh (18), and preferably 30 to 60 mesh. This is because if it is coarser than 30 mesh, the flame cannot be blocked, and if it is finer than 60 mesh, the pores (20a) are clogged immediately by the oil. Note that the configuration of the metal wire mesh (20) is not limited to this, and for example, a thin metal wire braided may be used.
[0030]
Next, the operation of this embodiment will be described. When this kitchen filter (10) is used in an exhaust port installed in a kitchen such as a Chinese restaurant or steak house, the punching metal (14) side is arranged indoors (see FIG. 1). A suction fan (32) is installed behind the filter (10) for the kitchen so that the smoke (30a) rising from the kitchen can be effectively sucked by operating the suction fan (32) during kitchen operation. It has become.
[0031]
Smoke (30a) containing a large amount of oil first passes through the punching metal (14), but since the through hole (14a) drilled in the punching metal (14) is large, the filtering action at this part is small, Most of the oil contained in the smoke (30a) passes through without being filtered.
[0032]
Subsequently, although it passes through the demister wire mesh (18), most of the oil and dust are filtered here. That is, innumerable voids (18b) are stretched around the demister wire mesh (18) so that the smoke (30a) passing through the demister wire mesh (18) passes through the demister wire mesh (18). Pass through while diffusing. At that time, the oil having a relatively large particle size contained in the smoke (30a) comes into contact with the wire (18a) and adheres to the surface thereof, and the dust contained in the smoke (30a) and air in the wire (18a). It is filtered by adhering to the surface of the adhering oil. In addition, even if the oil component containing dust solidifies in a dango shape on the wire rod (18a) of the demister wire mesh (18), the relatively large diameter gap (18b) is not completely blocked, The filtration efficiency does not decrease.
[0033]
The oil adhering to the wire rod (18a) gradually becomes large droplets and slowly flows down along the wire rod (18a) of the demister wire mesh (18) by its own weight. The oil that has flowed down the demister wire mesh (18) flows out from the drain discharge hole (28) drilled in the lower frame bar (12c) of the frame (12), and below the lower frame bar (12c). It is dripped at the oil receptacle (34) arranged in In this way, the demister wire mesh (18) can maintain a constant porosity, so that the filtration efficiency can be maintained over a long period of time.
[0034]
The smoke (30a) that has passed through the demister wire mesh (18) then passes through the metal wire mesh (20). Since the mesh of the metal wire mesh (20) is smaller than the mesh of the demister wire mesh (18), most of the oil having a small particle diameter that has passed through the demister wire mesh (18) is filtered by the metal wire mesh (20). Become.
[0035]
As described above, since oil and dust having a large particle size are filtered in advance in the demister wire mesh (18), the filtration target of the metal wire mesh (20) has a particle size not filtered by the demister wire mesh (18). Only a small amount of oil. Therefore, even if a metal mesh (20) with a small mesh is used, the oil content including dust does not solidify and become clogged, and the filtration efficiency does not decrease.
[0036]
The smoke (30a) that has passed through the metal wire mesh (20) finally passes through the porous filter plate (16). The porous filter plate (16) is formed with an infinite number of finely intricately shaped non-uniform through holes (16a), so smoke (30a) while passing through the through holes (16a) Oil and water vapor remaining in the inside contact with the inner wall of the through hole (16a) and are adsorbed. Here, the oil and water vapor filtered by the porous filter plate (16) are aggregated in the through holes (16a) and move toward the metal wire mesh (20) in contact with the porous filter plate (16) by capillary action. Then, it flows down through the metal wire mesh (20). The oil and moisture flowing down through the metal wire mesh (20) flows out from the drain discharge hole (28) drilled in the lower frame bar (12c) of the frame (12), and the oil receiving unit described above. Drip it into the bowl (34). Therefore, since the porous filter plate (16) can maintain a certain porosity, the filtration efficiency can be maintained over a certain period of time.
[0037]
The smoke (30a) that has passed through the porous filter plate (16) in this way becomes clean exhaust (30b) in which oil, water vapor, dust, and the like are filtered, and is released to the atmosphere through the exhaust port.
[0038]
In addition, since the mesh of the metal wire mesh (20) is very fine as described above, the flame can be shut off. Therefore, even if the oil accumulated in the kitchen filter (10) is ignited, the entry of the flame is blocked by the metal mesh (20), so that the flame passes over the kitchen filter (10) and goes into the back of the exhaust port. There is no fear of spreading to the club.
[0039]
On the other hand, when this kitchen filter (10) is used in a store that does not use much oil, such as a Japanese restaurant, the porous filter plate (16) side as shown in FIG. Will be installed facing the room. By doing in this way, the smoke (30a) rising from the kitchen first comes into contact with the porous filter plate (16) and is filtered.
[0040]
Between the indoor side of the porous filter plate (16) and the back side (inside the kitchen filter (10)), the back side has a negative pressure, so it is filtered and aggregated by the porous filter plate (16). The oil and water that have been used are easily transferred to the back side. Therefore, the oil and moisture flow down through the metal wire mesh (20) disposed inside the porous filter plate (16) as described above, and are discharged from the drain discharge hole (28).
[0041]
And the smoke (30a) from which the oil and the like has been filtered by the porous filter plate (16) sequentially passes through the metal wire mesh (20) and the demister wire mesh (18) in reverse order, and the punching metal (14) It is released into the atmosphere as clean exhaust (30b) from the through hole (14a).
[0042]
In the above-described embodiment, the thin metal metal mesh (20) is disposed on the back of the plate-like porous filter plate (16). The metal wire mesh (20) may be in close contact. Then, most of the through holes (16a) on the side of the porous filter plate (16) facing the metal wire mesh (20) and the small pores (20a) of the mesh of the metal wire mesh (20) are blocked by each other. It will come off and filtration efficiency will fall a little.
[0043]
Therefore, as means for preventing this problem, as shown in FIGS. 5 to 6, an adhesion preventing wire mesh (22) is disposed between the metal wire mesh (20) and the porous filter plate (16). It may be.
[0044]
The metal mesh for preventing adhesion (22) is to form an appropriate space between the metal mesh (20) and the porous filter plate (16) to prevent both members (16) and (20) from adhering to each other. It is provided as necessary, and is set so that the contact area between the porous filter plate (16) and the metal wire mesh (20) is as small as possible. In this embodiment, an expanded metal having a substantially rhombic hole (22a) in which the length of the long side of the diagonal line is 14 mm and the length of the short side is 7 mm is used. However, the present invention is not limited to this. For example, a metal lath may be used.
[0045]
When the punching metal (14) side is placed facing the indoor side and the smoke (30a) containing a large amount of oil is exhausted, the smoke (30a) is the same as described above, the punching metal (14) and the demister wire mesh (18). And through the metal wire mesh (20).
[0046]
Here, the metal wire mesh (20) is a space between the demister wire mesh (18) having a substantially bellows-shaped cross section in the width direction and the adhesion preventing wire mesh (22) having a small contact area with the metal wire mesh (20). Therefore, an appropriate space is formed on both sides of the metal wire mesh (20). That is, the smoke (30a) escapes from the wide space to the wide space again through the narrow pores (20a), and when passing through the metal wire mesh (20), a so-called Venturi effect occurs, and the flow velocity is increased. Increase temporarily. Accordingly, clogging of the metal wire mesh (20) is less likely to occur, and a reduction in filtration efficiency can be prevented.
[0047]
Smoke (30a) that has passed through the metal wire mesh (20) will then pass through the adhesion prevention wire mesh (22), but the mesh of the adhesion prevention wire mesh (22) is coarse, so the filtering action at this part Is small. The smoke (30a) that has passed through the adhesion prevention wire mesh (22) then passes through the porous filter plate (16) and is released into the atmosphere as clean exhaust (30b).
[0048]
The oil and water aggregated in the through holes (16a) of the porous filter plate (16) move toward the adhesion preventing wire mesh (22) in contact with the porous filter plate (16) by capillary action, It flows down the wire mesh (22) for preventing adhesion. This also applies to the case where the porous filter plate (16) is disposed indoors.
[0049]
In the above-described embodiment, only one demister wire mesh (18) is used. However, as shown in FIGS. 7 to 8, a plurality of (4 in this embodiment) demister wire mesh (18) is used. May be arranged in layers.
[0050]
The plurality of demister wire meshes (18) are stacked such that the apexes (18c) that protrude outward are opposed to each other. By laminating a plurality of demister wire meshes (18) in this manner, a space is formed between the opposing demister wire meshes (18), and the layer thickness of the demister wire mesh (18) layer is increased. Therefore, the smoke (30a) passes through the demister wire mesh (18) while being more diffused, and thus the filtration efficiency can be further improved.
[0051]
Furthermore, in the above-described embodiment, the oil content filtered by the demister wire mesh (18) slowly flows down along the wire (18a) of the demister wire mesh (18) by its own weight so as to maintain a constant porosity. However, between the demister wire mesh (18) (in this embodiment, between the demister wire mesh (18d) on the back of the punching metal (14) and the demister wire mesh (18e) disposed on the back) An oil collecting wire mesh (24) may be provided in the oil collecting portion so that the oil component accumulated in the demister wire mesh (18) is allowed to flow down quickly.
[0052]
The oil recovery wire mesh (24) is formed by weaving a thick stainless wire with a relatively coarse mesh vertically and horizontally, and the oil filtered by the demister wire mesh (18) is used to connect this thick stainless wire (24a). It is designed to be guided to its lower end.
[0053]
As described above, the oil component filtered by the demister wire mesh (18) gradually becomes large droplets and begins to slowly flow down along the wire (18a) of the demister wire mesh (18). When the oil component in the form of droplets comes into contact with the oil recovery wire mesh (24), the oil component quickly flows down through the thick stainless wire (24a) constituting the oil recovery wire mesh (24). Then, the oil that has flowed down through the oil recovery wire mesh (24) flows out from the drain discharge hole (28) formed in the lower frame bar (12c) of the frame (12), as described above. Drip into the oil receiver (34). Accordingly, since the demister wire mesh (18) can maintain a constant porosity, the filtration efficiency can be maintained over a long period of time.
[0054]
【The invention's effect】
According to the present invention, the demister wire mesh is disposed on the back surface of the punching metal constituting one surface of the kitchen filter, and between the demister wire mesh and the porous filter plate constituting the other surface of the kitchen filter. Since the metal wire mesh is disposed in the wall, smoke containing a large amount of oil can be exhausted by arranging the kitchen filter with the punching metal facing the indoor side. Moreover, since the other surface of the kitchen filter is composed of a porous filter plate, smoke that does not contain much oil can be exhausted by arranging the porous filter plate toward the indoor side. Therefore, smoke exhaust including a large amount of oil and smoke exhaust not including much oil can be performed in one type.
[0055]
Further, since many voids are formed inside the demister wire mesh, the oil component filtered by the demister wire mesh slowly flows down along the wire due to its own weight. Therefore, the demister wire mesh can maintain a constant porosity, and can maintain the filtration efficiency for a long period of time.
[0056]
Furthermore, since oil and dust having a large particle size are filtered in advance by the demister wire mesh, only the oil component having a small particle size that has not been filtered by the demister wire mesh can be filtered. Therefore, even when a metal mesh with a small mesh is used, the oil containing dust does not become clogged and clogged, and the filtration efficiency does not decrease.
[Brief description of the drawings]
FIG. 1 is a perspective view when a punching metal side of a kitchen filter of the present invention is installed indoors.
FIG. 2 is a perspective view when the porous filter plate side of the kitchen filter of the present invention is installed on the indoor side.
FIG. 3 is an enlarged cross-sectional perspective view (partially omitted) showing the internal structure of the kitchen filter of the present invention.
FIG. 4 is an enlarged cross-sectional exploded perspective view (partially omitted) showing the internal structure of the kitchen filter of the present invention.
FIG. 5 is an enlarged cross-sectional perspective view (partially omitted) showing the internal structure of a kitchen filter according to another embodiment of the present invention.
FIG. 6 is an enlarged cross-sectional exploded perspective view (partially omitted) showing the internal structure of a kitchen filter according to another embodiment of the present invention.
FIG. 7 is an enlarged cross-sectional perspective view (partially omitted) showing the internal structure of a kitchen filter in still another embodiment of the present invention.
FIG. 8 is an enlarged cross-sectional exploded perspective view (partially omitted) showing an internal structure of a kitchen filter in still another embodiment of the present invention.
FIG. 9 is an enlarged sectional perspective view (partially omitted) showing an internal structure of a conventional example.
[Explanation of symbols]
(10)… Kitchen filter
(12) ... Frame
(14)… Punching metal
(16)… Porous filter plate
(18) ... Demister wire mesh
(20)… Metal wire mesh
(22)… Wire mesh for preventing adhesion
(24)… Wire mesh for oil recovery

Claims (4)

A frame installed at the exhaust port of the kitchen,
A punching metal fitted into the frame and constituting one surface;
A porous filter plate that is fitted into the frame and constitutes the other surface;
A plurality of demister wire nets formed by laminating a plurality of thin wire rods arranged in a layer on the punching metal side between the punching metal and the porous filter plate ,
A metal wire mesh disposed between the demister wire mesh and the porous filter plate and having a smaller mesh than the demister wire mesh , and
It is formed by weaving a thick stainless steel wire with vertical and horizontal coarse meshes, provided between the plurality of demister wire meshes, and provided with an oil recovery wire mesh that guides oil collected by the demister wire meshes to its lower end. Characteristic kitchen filter. The kitchen filter according to claim 1, wherein the demister wire mesh has a cross-section in the width direction formed in a substantially bellows shape. An adhesion preventing wire net provided between the metal wire mesh and the porous filter plate, having a small contact area between the metal wire mesh and the porous filter plate, and having an uneven surface. The kitchen filter according to 1 or 2. 4. The kitchen filter according to claim 1, wherein a drain discharge hole is formed in a lower surface of the frame body.

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