JP2004132576A - Exhaust device for individually exhausting each of tables with cooking part - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To facilitate the replacement or cleaning of a grease filter in an exhaust device for individually exhausting each of tables with cooking part. <P>SOLUTION: In this exhaust device, a suction part 34 is provided so that its suction end 35 is opposed to the cooking part K of a table T with cooking part from above, and exhausting of the cooking part is performed by sucking air through the suction end. In this exhaust device, the size of the suction end in the suction part is set smaller than the side of the cooking part. In the middle of the suction part, a filter installation part 30 is provided in a height position enabling a person to operate it in a general standing position near the table with cooking part. The grease filter for separating/recovering oil contained in exhaust air is dettachably installed to the filter installation part. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an exhaust device for individually exhausting a table with a heating cooking unit to which a cooking unit such as a charcoal stove or a gas stove is attached.
[0002]
[Prior art]
An exhaust device for individually exhausting a table with a heating cooking unit is generally installed in a restaurant such as a yakiniku restaurant where the table with a heating cooking unit is installed. FIG. 5 shows a simplified configuration of such a conventional exhaust system in the related art. The exhaust device includes an exhaust blower 1, an exhaust duct 2 connected to the blower 1 and usually passing through the back of the ceiling S, and a suction end 3 connected to the exhaust duct 2 and having a suction end 3 attached to a table with a cooking unit. A suction unit 4 is provided so as to face a heating cooking unit (not shown) of T from above. The intake section 4 has a so-called hood structure. That is, the suction part 4 is formed in a skirt shape so as to spread downward, and the size of the suction end 3 is set to be larger than the size of the heating cooking part. The large-sized suction end 3 is configured to widely cover the heating cooking unit above a predetermined height from the table T with the cooking unit.
[0003]
As described above, in the conventional exhaust device for individually exhausting the table with the heating cooking unit, the intake unit is formed in a hood structure. This is based on the idea that smoke and hot air generated from the cooking unit can be more efficiently suctioned and exhausted by making the suction unit a hood structure and making the size of the suction end larger than the size of the cooking unit. It is. However, in reality, efficient suction and exhaust are not always performed, and even if there is a slight flow in the surrounding air, the suction flow is disturbed and it is impossible to perform suction and exhaust without leakage. .
[0004]
The intake portion of the hood structure has not only a high efficiency of suction and exhaust as described above, but also has the following problems due to its large size. One of them is that the intake portion of the large-sized hood structure faces from above, so that it interferes with eating and drinking around the table with the cooking portion. This has naturally been taken into consideration in the past, and the suction end was kept as far away from the table with the cooking unit as possible. However, the height that can be separated in relation to the suction and exhaust capacity is limited to about 400 to 500 mm from the upper surface of the table with the cooking unit, and it gives a feeling of oppression during eating and drinking and also eats and drinks while enjoying conversation It was inevitable that the atmosphere would be damaged.
[0005]
Another problem is that a large capacity is required for air conditioning in a room in which a table with a cooking unit is installed, and the cost of air conditioning increases accordingly. In other words, since the intake portion has a large hood structure, it is necessary to increase the amount of exhaust air, so that the amount of air circulating in the room increases, and as a result, a large air conditioning capacity is required, resulting in an increase in air conditioning costs. It was that.
[0006]
In addition to this, there is another problem that the structure becomes large when the intake section is made to have a movable structure. That is, when the movable structure is given to the intake unit so that the suction end can be pulled up when not in use for the beauty of the store where the table with the cooking unit is installed, the intake unit is heavy. That is, the movable structure must be large.
[0007]
As described above, the conventional exhaust device for individually exhausting the table with the heating cooking unit has several problems, and its improvement has been demanded. In response to such a demand, the inventor of the present application has previously proposed a new exhaust device as Japanese Patent Application No. 2002-099758. In this exhaust device, it is not effective to make the intake portion a hood structure for local exhaust such as exhausting smoke and hot air from the cooking portion of the table with the cooking portion, and conversely, the opening of the suction end It is based on the finding that it is effective to reduce the size and perform suction and exhaust.
[0008]
The reason why it is effective to reduce the size of the suction end to perform suction and exhaust is considered as follows. That is, the hot air flow rises from the heating cooking unit of the table with the heating cooking unit in a pattern like a candle flame, and the smoke from the heating cooking unit tends to flow on this hot air flow. Therefore, by performing intensive suction with the suction end facing the upper end of the hot air flow, more efficient exhaust can be performed. Due to such an exhaust mechanism, the size of the suction end facing the hot air flow needs to be slightly larger than the spread at the upper end of the hot air flow, and it is important to make the upper end of the hot air flow as small as possible within a range satisfying this requirement. It is effective for making intensive suction in the part. Therefore, the size of the suction end facing the hot air flow is at least smaller than the size of the cooking unit, and the most preferable condition is to form the suction end to a size slightly larger than the spread of the upper end of the hot air flow. Yes, a practical guide is given as less than 1/3 of the size of the cooking unit.
[0009]
An example of a configuration of the exhaust device in Japanese Patent Application No. 2002-099758 based on such a concept is shown in FIGS. 6 and 7 in a simplified manner. As shown in FIG. 6, this exhaust device includes an exhaust blower 1 and an exhaust duct 2 connected to the blower 1 and passing through the back of the ceiling S, similarly to the conventional exhaust device shown in FIG. Including. An intake section 11 is connected to the exhaust duct 2 via a connection end 11t of the intake duct 11. The suction end 12 of the intake section 11 faces the cooking section K (FIG. 7) of the table T with the cooking section from above. On the other hand, local suction and exhaust of smoke and hot air from the cooking unit K is performed.
[0010]
The intake section 11 in the illustrated example is movable, and is formed so as to be able to expand and contract by joining three pipes 13, 14, and 15 having different diameters. Specifically, the diameter of the lower pipe 13, the middle pipe 14, and the upper pipe 15 are gradually increased in this order, the lower pipe 13 is inserted into the middle pipe 14, and the middle pipe 14 is inserted. It is formed so as to be inserted into the upper pipe 15 and expand and contract by a mechanism described later.
[0011]
Forming the intake section 11 by joining the pipes 13, 14, 15 whose diameters gradually increase from the lower stage to the upper stage in this way has another effect in addition to enabling expansion and contraction. That is, a noise caused by an exhaust gas flowing through the intake unit 11 is suppressed. That is, the diameter of the middle pipe 14 is made larger than the diameter of the lower pipe 13, and the diameter of the upper pipe 15 is made larger than the diameter of the middle pipe 14, so that the static pressure is released in sequence, thereby reducing the intake section. That is, it is possible to suppress the flow noise at 11.
[0012]
The lower end of the pipe 13 has a suction end 12 at the tip, and the size (opening size R) of the suction end 12 is smaller than the size W of the heating cooking unit K. The reason why the opening size of the suction end 12 is set in this manner is that, as shown in FIG. 7, the hot air flow H rises in a pattern like a candle flame from the heating cooking unit K, and This is because the smoke and hot air from the heating and cooking unit K can be efficiently sucked and exhausted by utilizing the fact that the smoke tends to flow on the hot air flow H. In other words, by making the suction end 12 face the upper end of the hot air flow H, the suction using the hot air flow H can be effectively performed, and thereby the smoke and the hot air from the heating cooking unit K can be more efficiently removed. This means that the air can be sucked and exhausted. The extent to which the suction end 12 wraps the upper end of the hot air flow H is only slightly larger than the extent of the upper end of the hot air flow H. The opening size R of the suction end 12 is reduced as much as possible in a range satisfying this. For this reason, the size of the opening of the suction end 12 is usually １ ／ or less of the size of the cooking unit K, and most preferably about ３. In the example shown in the figure, the heating cooking unit K is a charcoal stove, and the opening size R is set to 1/3 of the diameter W of the burning portion of the charcoal stove K. It is preferable that the distance between the grill M and the suction end 12 be about 20 cm as a suction speed at a wind speed of 15 m.
[0013]
As described above, the suction section 11 can be expanded and contracted by joining three pipes 13, 14, and 15 having different diameters, so that the suction end 12 can be pulled up when not needed. . The mechanism for the expansion and contraction operation is formed mainly of a wire 17 connected to the lower pipe 13 so as to hang the same, and a driving means 18 for winding and unwinding the wire 17. That is, when the wire 17 is wound by the driving means 18, the lower pipe 13 is first lifted by the wire 17 and rises so as to enter the middle pipe 14, and then the stopper 19 provided on the lower pipe 13 is Ascending, the upper pipe abuts against the stopper portion 20 at the lower end of the middle pipe 14, and accordingly, the middle pipe 14 reaches the stopper section 21 at the lower end of the upper pipe 15 until the middle pipe 14 comes into contact with the stopper portion 21 at the lower end of the upper pipe 15. By ascending so as to enter the pipe 15, a contraction operation in expansion and contraction is performed. On the other hand, the elongating operation in the expansion and contraction is performed by drawing out the wire 17 by the driving means 18 from the contracted state as described above, so that the lower pipe 13 and the middle pipe 14 descend sequentially by their own weight.
[0014]
It is generally required to add a fire prevention structure to the intake section 11 described above. As a structure for the fire prevention, a fire prevention damper 24 is built in the intake unit 11, and when the exhaust gas sucked into the intake unit 11 is at a certain temperature or higher, the fire prevention damper 24 is activated to operate at a certain temperature or higher. Is prevented from flowing into the exhaust duct 2. As another structure for fire prevention, a grease filter 25 is provided in the intake section 11 and trapped by the grease filter 25 so that oil in the exhaust gas can be prevented from flowing into the exhaust duct 2. The grease filter 25 is provided at the connection end 11t of the intake section 11.
[0015]
[Problems to be solved by the invention]
As described above, in the exhaust device of Japanese Patent Application No. 2002-099758, a grease filter is provided as one of the structures related to fire prevention. The grease filter has a function of separating and collecting the oil in the exhaust gas in order to prevent the oil component from flowing into the exhaust duct. As a result, oil will accumulate over time, so that it is necessary to periodically replace or clean it. However, in the exhaust device disclosed in Japanese Patent Application No. 2002-099758, the grease filter is provided at the connection end of the intake section to the exhaust duct, and is located behind the ceiling where the exhaust duct passes. For this reason, it is necessary to replace and clean the grease filter from a work port provided on the ceiling, and the work load increases. In particular, in a structure such as the exhaust device of Japanese Patent Application No. 2002-099758 in which the intake portion is made thinner to improve the intake efficiency, the amount of oil recovered by the grease filter increases, and the frequency of replacement and cleaning of the grease filter is reduced. The work load increases because of the increase. Therefore, there is a demand for easier replacement and cleaning of the grease filter.
[0016]
The present invention has been made in order to meet such a demand, and has been made to improve an exhaust device proposed in Japanese Patent Application No. 2002-099758 so that replacement and cleaning of a grease filter can be easily performed. The purpose is.
[0017]
[Means for Solving the Problems]
In order to achieve the above object, according to the present invention, the cylindrical suction unit connected to the exhaust duct has its suction end facing the heating cooking unit of the table with the heating cooking unit from above, and sucks through the suction end. With this configuration, it is possible to exhaust air to the heating cooking unit for each table with the heating cooking unit, and to set the size of the suction end of the suction unit to be smaller than the size of the heating cooking unit. In the exhaust device for individually exhausting a table with a unit, a filter mounting unit is provided at a height position where a person can operate in a normal standing state beside the table with the cooking unit in the middle of the suction unit. A grease filter for separating and collecting oil contained in the exhaust gas is detachably mounted on the portion.
[0018]
Further, in the present invention, with respect to the exhaust device as described above, the filter mounting portion is formed so that the suction end side of the suction portion can be separated through the filter mounting portion, and when replacing or cleaning the grease filter. The grease filter can be replaced or cleaned with the suction end side separated.
[0019]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described. FIG. 1 shows a simplified configuration of an exhaust device for individually exhausting a table with a cooking unit according to the first embodiment. This exhaust device has a basic structure similar to that of the exhaust device in FIG. 7, and is provided with a filter mounting portion 30 at a predetermined height position based on the basic structure. First, as an outline of a basic structure, an air intake portion 34 is formed so as to be able to expand and contract by joining three pipes 31, 32, and 33 having different diameters. The suction portion 34 has a suction end 35 at the tip of the lower pipe 33, and the opening size of the suction end 35 is made smaller than the size of the heating portion K of the table T with the cooking portion. As described for the exhaust device in FIG. 7, efficient suction and exhaust can be performed.
[0020]
Next, the filter mounting section 30 will be described. The installation height position of the filter mounting portion 30 is particularly important, and the filter mounting portion 30 is provided at a height position where a person can operate in a normal standing state near the table T with the heating cooking unit. In the present embodiment, the lower pipe 33 is incorporated at a position near the tip. Therefore, the height position of the filter mounting section 30 is about 400 to 500 mm from the upper surface of the table T with the cooking section.
[0021]
FIG. 2 shows the internal structure of the filter mounting section 30. The filter mounting unit 30 is incorporated in the lower pipe 33 as described above. Specifically, the lower pipe 33 is divided into an upper member 36 and a lower member 37, and the diameter of each of the upper member 36 and the lower member 37 is, for example, about 1.5 times larger than that of the pipe 33. A short cylindrical upper cover part 38 and a lower cover part 39 are provided, and the upper cover part 38 and the lower cover part 39 form the filter mounting part 30. The upper cover portion 38 and the lower cover portion 39 are configured so that the lower side of the upper cover portion 38 is fitted into the lower cover portion 39 so as to overlap with each other, and the fitted portion can be fixed and joined with the set screw 41. Has been. Further, a holding shelf 42 is provided at an upper end of the lower cover portion 39, and a holding end 43 is provided at a lower end of the upper cover portion 38. When the two cover portions 38 and 39 are overlapped, the holding shelf 42 and the holding end 43 The holding gap 44 is formed.
[0022]
A grease filter 45 is detachably attached to the filter attachment section 30. As described above, the grease filter 45 is to supplement the oil component in the exhaust gas to prevent the oil component from flowing into the exhaust duct. The grease filter 45 in the illustrated example is of a filtration type, and is formed in a sandwich structure in which a wire mesh is overlapped on both surfaces thereof with a filter material called a well-known demister as a core. Further, this filtration type grease filter 45 is formed in a spherical shape, and a flange portion 45f is provided around the grease filter 45. The flange portion 45f is held in the holding gap 44 so that the grease filter 45 can be mounted on the filter mounting portion 30. Have been.
[0023]
In the present embodiment, the fireproof damper 48 is also incorporated in such a filter mounting portion 30. The fireproof damper 48 is of a butterfly type in which two semicircular damper blades 50 are provided inside a damper cylinder 49. That is, normally, the two damper blades 50 are closed so as to overlap each other, and when the temperature reaches a certain level or more, a fuse (not shown) regulating the overlapping state of the damper blades 50 is released. The damper blade 50 is opened, and thereby the damper cylinder 49 is closed. Here, in the standard butterfly type fire prevention damper 48, the tip of the damper blade 50 is configured to slightly protrude from the damper cylinder 49, but the grease filter 45 is formed in a spherical shape as described above. Is related to this. That is, the grease filter 45 is formed in a spherical shape so as to have a shape corresponding to the outer periphery of the semicircular damper blade 50 protruding from the damper cylinder 49. By doing so, the mounting of the grease filter 45 to the filter mounting section 30 and the incorporation of the fire prevention damper 48 can be made more compact.
[0024]
The replacement and cleaning of the grease filter 45 in the exhaust device as described above is performed as follows. The replacement or cleaning of the grease filter 45 is usually performed periodically, such as every day or every few days. When replacing or cleaning the grease filter 45, first, the set screw 41 is loosened and the lower member 37 is removed from the upper member 36. When the lower member 37 is removed, the grease filter 45 is placed on the holding shelf 42, and is removed therefrom. Next, the removed grease filter 45 is cleaned and returned, or a previously prepared grease filter that has been cleaned is newly mounted on the lower member 37. Then, the lower member 37 is attached to the upper member 36 again, and the operation is completed. These series of operations can be performed in a state where the worker stands in a normal posture without using a stepladder, a stepping board, or the like near the table T with the cooking unit. In addition, since the work can be performed by removing the lower member 37 with the grease filter 45 mounted thereon, and then removing the grease filter 45 from the lower member 37, it is difficult to handle due to the adhesion of oil. The grease filter 45 can be processed under conditions that make it easier to work. That is, in the structure of the exhaust device as in the present embodiment, the grease filter 45 can be cleaned or replaced as a very simple operation. This applies to the case where the fire prevention damper 48 is inspected or reset. That is, in the structure in which the fire prevention damper 48 is also incorporated in the filter mounting portion 30 as in the present embodiment, the fire prevention damper 48 can be inspected and reset with the same work contents as when cleaning or replacing the grease filter. The task is to be very easy.
[0025]
FIG. 3 shows a simplified configuration of an exhaust device for individually exhausting a table with a cooking unit according to a second embodiment. The present embodiment is a case where the suction unit 60 is of a fixed type. That is, the intake section 60 is formed by fixedly joining two pipes, the upper pipe 61 and the lower pipe 62. In the present embodiment, a filter mounting portion 63 is provided at the connection between the upper pipe 61 and the lower pipe 62. For this reason, the height position of the filter mounting part 63 is a position of about 700 to 800 mm from the upper surface of a table with a cooking unit (not shown). Note that the opening size of the suction end 64 at the tip of the lower pipe 62 is made smaller than the size of the heating cooking unit of the table with the heating cooking unit, thereby enabling efficient suction and exhaust. This is the same as the first embodiment.
[0026]
As shown in FIG. 4, the filter mounting portion 63 has an upper cover portion 65 provided at the lower end of the upper pipe 61 and the upper end of the lower pipe 62, respectively, as in the first embodiment. It is formed by the side cover portion 66, and the lower side of the upper cover portion 65 is fitted into and overlapped with the lower cover portion 66, and the fitted portion can be fixed by a set screw 67 and joined. The lower cover part 66 is detachably connected to the lower pipe 62 via the connection cylinder part 68, and can be separated from the lower pipe 62 by loosening the set screw 69.
[0027]
A meandering type grease filter 71 that generates a meandering flow in the exhaust gas flowing through the suction part 60 and collects oil is used as the filter mounting part 63. Although the detailed structure of the meandering flow type grease filter 71 is not shown, the meandering flow type grease filter 71 is formed in a double tube structure including an outer tube and an inner tube, and a meandering flow forcing feather is provided between the outer tube and the inner tube. It has a structure with a meandering flow forced channel provided, and the exhaust gas flows in the meandering forced flow channel with a large meandering to efficiently separate and recover oil in the exhaust. I can do it. As such a meandering flow type grease filter, it is preferable to use, for example, an "oil recovery filter" disclosed in JP-A-2000-184968.
[0028]
Since the meandering type grease filter 71 having a cylindrical structure is used, the lower cover 66 is provided with a support shelf 72 for mounting and supporting the grease filter 71. I have. An oil reservoir 73 for storing oil separated and collected by the grease filter 71 is formed below the support shelf 72.
[0029]
The replacement and cleaning of the grease filter 71 in the exhaust device as described above is performed as follows. Since the meandering type grease filter 71 has a large capacity, replacement and cleaning can be performed only once a week, for example. When replacing or cleaning the grease filter 71, first, the set screw 67 is loosened to remove the lower pipe 62 from the upper pipe 61, and the set screw 69 is loosened to remove the lower cover 66 from the lower pipe 62. Remove. Next, the grease filter 71 is taken out from the lower cover 66 and the oil reservoir 73 is cleaned. Then, the removed grease filter 71 is cleaned and returned, or a cleaned grease filter prepared in advance is newly attached to the lower cover 66. Finally, the lower cover 66 is attached to the lower pipe 62, and the lower pipe 62 is attached to the upper pipe 61 to complete the operation. It is similar to the first embodiment that these series of operations can be easily performed.
[0030]
【The invention's effect】
As described above, according to the present invention, the grease filter can be easily cleaned and replaced while taking advantage of the many advantages of the exhaust device proposed in Japanese Patent Application No. 2002-099758. And an exhaust device that is even easier to use can be realized.
[Brief description of the drawings]
FIG. 1 is a simplified diagram showing a configuration of an intake unit of an exhaust device according to a first embodiment.
FIG. 2 is a simplified view showing an internal structure of a filter mounting portion suction in the exhaust device of FIG. 1;
FIG. 3 is a diagram showing a simplified configuration of an intake section of an exhaust device according to a second embodiment.
FIG. 4 is a simplified view showing an internal structure of a filter mounting portion suction in the exhaust device of FIG. 3;
FIG. 5 is a diagram showing a simplified overall configuration of a conventional exhaust device.
FIG. 6 is a diagram schematically illustrating the overall configuration of an improved conventional exhaust device.
7 is a diagram showing a simplified configuration of an intake unit in the exhaust device of FIG. 6 together with its internal structure.
[Explanation of symbols]
2 Exhaust ducts 11, 34, 60 Intake sections 12, 35, 64 Suction ends 30, 63 Filter mounting sections 45, 71 Grease filter K Cooking section T Table with cooking section

Claims (2)

The cylindrical suction unit connected to the exhaust duct has its suction end facing the heating cooking unit of the table with the heating cooking unit from above, and sucks in through this suction end, thereby discharging the exhaust air to the heating cooking unit. In the exhaust device for individually heating the cooking unit with a cooking unit, the size of the suction end in the suction unit is smaller than the size of the cooking unit, and the size of the suction end in the suction unit is reduced. In the middle of the intake section, a filter mounting section is provided at a height position where a person can operate in a normal standing state beside the table with the cooking section, and the filter mounting section includes an oil component contained in the exhaust gas. An exhaust device for individually exhausting a table with a cooking unit, wherein a grease filter for separation and recovery is detachably mounted. The filter mounting portion is formed so that the suction end side of the suction unit can be separated through the filter mounting portion, and when the grease filter is replaced or cleaned, the grease filter is separated from the suction end side. The exhaust device for individually exhausting a table with a heating / cooking unit according to claim 1, wherein the exhaust device can be replaced or cleaned.

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