JP3460998B1 - Exhaust device for individual exhaust of table with cooking unit - Google Patents

Abstract

A grease filter is easily exchanged and cleaned for an exhaust device for individually exhausting a table with a cooking section. SOLUTION: In the exhaust device, a heating unit is configured such that a cylindrical suction unit 34 has a suction end 35 facing a heating cooking unit K of a table T with a heating cooking unit from above, and sucks through the suction end. It is made to make exhaust to the part,
In addition, the size of the suction end in the suction section is smaller than the size of the heating cooking section. In the middle of the intake section, a filter mounting section 30 is provided at a height position where a person can operate in a normal standing state near a table with a cooking section. A grease filter for separation and recovery is detachably mounted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust device for individually evacuating a table with a heating / cooking unit to which a heating / cooking unit such as a charcoal stove or a gas stove is attached.

[0002]

2. Description of the Related Art Generally, an exhaust device for individually exhausting a table with a heating and cooking unit is installed in a restaurant such as a yakiniku restaurant where the table with a heating and cooking unit is installed. FIG. 5 shows a simplified typical configuration of such an exhaust device in the related art. This exhaust device is a blower 1 for exhaust, an exhaust duct 2 that is connected to this blower 1 and is normally passed through the back of the ceiling S, and is connected to this exhaust duct 2, and its suction end 3 is a table with a cooking section. It includes an air intake portion 4 provided so as to face the heating and cooking portion (not shown) of T from above. And the intake section 4 is
It is a so-called hood structure. That is, the intake section 4
It is formed into a skirt and spreads downward,
The size of the suction end 3 is made larger than the size of the heating and cooking section. Further, the large-sized suction end 3 is configured to widely cover the heating and cooking section above the table T with the heating and cooking section at a predetermined height.

As described above, in the conventional exhaust device for individual exhaust of the table with the heating and cooking section, the intake section is formed in the hood structure. This is based on the idea that smoke and hot air generated from the heating and cooking unit can be more efficiently sucked and exhausted by making the intake unit a hood structure and making the size of the suction end larger than the size of the cooking unit. Is.
However, in reality, efficient suction / exhaust is not performed, and even if there is a slight flow in the surrounding air, the suction flow is disturbed and it becomes impossible to perform suction / exhaust without leakage. .

The suction part of the hood structure is thus sucked and
Not only is the exhaust efficiency not necessarily high, but the large size also causes the following problems. One of them is that the intake part of the large-sized hood structure faces from above, which interferes with eating and drinking around the table with the cooking section. This is naturally taken into consideration in the past, and the suction end has been separated from the table with the heating and cooking section as much as possible. However, the height that can be separated in relation to the suction / exhaust capacity is about 400-500 mm from the top of the table with heating and cooking unit, which gives a feeling of pressure during eating and drinking, and also enjoys conversation while eating and drinking. I couldn't avoid damaging the atmosphere.

The other one is a problem that a large capacity is required for the air conditioning of the room where the table with the heating / cooking unit is installed, and the air conditioning cost increases accordingly. That is, since the intake part has a large-sized hood structure, it is necessary to increase the exhaust air volume, so the amount of air circulation in the room increases, and as a result, a large air conditioning capacity is required, resulting in an increase in air conditioning cost. It was that there was.

In addition to this, there is another problem that the structure becomes large when the intake part is made to have a movable structure. That is, in order to allow the suction end to be pulled up when not in use for the sake of the beauty of the store where the table with the heating and cooking section is installed, etc.
This means that the intake structure is heavy and its movable structure must be large.

As described above, the conventional exhaust system for individual exhaust of the table with the heating and cooking section has some problems, and improvement thereof 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 system, it is not effective to make the intake part a hood structure for local exhaust such as exhausting smoke or hot air from the heating part of the table with the heating part, and conversely opening the suction end. It is based on the finding that it is effective to reduce the size and perform suction and exhaust.

The reason why it is effective to reduce the size of the suction end to perform suction / exhaust is considered as follows. That is, the hot air stream rises from the heating and cooking section of the table with the heating and cooking section in a pattern like a candle flame, and the smoke from the heating and cooking section tends to flow along with the hot air stream. Therefore, the suction end is exposed to the upper end of the hot air flow to perform intensive suction, so that more efficient exhaust can be performed. From the exhaust mechanism, the size of the suction end exposed to the hot air flow is
It is enough to be slightly larger than the spread at the upper end of the hot air flow, and it is effective to make the suction at the upper end of the hot air flow as small as possible within the range that satisfies this requirement. Therefore, the size of the suction end exposed to the hot air flow must be at least smaller than the size of the cooking section, 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 measure is given as 1/3 or less of the size of the cooking section.

Japanese Patent Application 2002 based on such an idea
A configuration example of the exhaust device in No. 099758 is shown in simplified form in FIGS. 6 and 7. As shown in FIG. 6, this exhaust device includes a blower 1 for exhaust and an exhaust duct 2 connected to the blower 1 and passed through the back of the ceiling S, similarly to the conventional exhaust device shown in FIG. Including. An intake part 11 is connected to the exhaust duct 2 via a connecting end 11t, and the suction end 12 of the intake part 11 is brought into contact with the cooking section K (FIG. 7) of the table T with the cooking section from above. The smoke and hot air from the cooking section K is locally sucked and exhausted.

The intake portion 11 in the illustrated example is movable, and is formed so that it can be expanded and contracted 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, and the lower pipe 13 is inserted into the middle pipe 14,
The middle-stage pipe 14 is inserted into the upper-stage pipe 15 so that it can be expanded and contracted by a mechanism described later.

Forming the intake portion 11 by joining the pipes 13, 14, 15 that gradually increase in diameter from the lower stage to the upper stage in this manner is effective in addition to allowing expansion and contraction. There is. That is to suppress the air flow noise due to the exhaust flow flowing through the intake section 11. That is, by making the diameter of the middle-stage pipe 14 larger than the diameter of the lower-stage pipe 13 and the diameter of the upper-stage pipe 15 larger than the diameter of the middle-stage pipe 14, the static pressures are sequentially released, and the intake portion is thereby released. This means that the airflow noise in 11 can be suppressed.

The tip of the lower pipe 13 has a suction end 1
The size of the suction end 12 (opening size R) is smaller than the size W of the cooking section K. The opening size of the suction end 12 is set in this way, as shown in FIG. 7, the hot air flow H rises from the cooking section K in a pattern like a candle flame.
This is because smoke and hot air from the cooking section K can be efficiently sucked and exhausted by utilizing the fact that smoke from the cooking section K also tends to flow along with the hot air flow H. That is, by making the suction end 12 face the upper end of the hot air flow H, it is possible to perform the suction effectively using the hot air flow H, and thereby the smoke and hot air from the heating and cooking unit K can be more efficiently supplied. It means that it can be sucked in and exhausted. It is sufficient that the suction end 12 wraps the upper end of the hot air flow H slightly wider than the spread of the upper end of the hot air flow H. Then, the opening size R of the suction end 12 is made as small as possible within the range where this is satisfied. Therefore, the opening size of the suction end 12 is usually 1/2 or less of the size of the cooking section K, and most preferably 1/3.
It is a degree. In the example of the drawing, the heating and cooking section K is a charcoal-burning stove, and the opening size R is set to 1/3 with respect to the diameter size W of the combustion section of this charcoal-burning stove K. In addition, grill net M
It is preferable that the distance between the suction end 12 and the suction end 12 is about 20 cm as the suction speed at a wind speed of 15 m.

As described above, the intake portion 11 is made expandable and contractable by joining the three pipes 13, 14, 15 having different diameters so that the suction end 12 can be pulled up when unnecessary. Has been done. The mechanism for the expansion and contraction operation is mainly composed of a wire 17 connected to the lower pipe 13 so as to suspend it, and a drive means 18 for winding and unwinding the wire 17. That is, when the wire 17 is wound up by the driving means 18, first, the lower pipe 13 is pulled up by the wire 17 and rises so as to enter the middle pipe 14, and then the stopper portion 19 provided in the lower pipe 13 is connected to the pipe 13. The stopper portion 20 at the lower end of the middle stage pipe 14 due to the rise
When the pipe 14 in the middle stage abuts on the pipe 15 in the upper stage until it comes into contact with the stopper portion 20 at the lower end of the pipe 15 in the upper stage, the pipe 14 in the middle stage rises and contracts. Make a contraction action in. On the other hand, the extension operation in expansion and contraction is performed by feeding the wire 17 from the contracted state as described above by the drive means 18, whereby the lower pipe 13 and the middle pipe 14 are sequentially lowered by their own weight.

It is generally required to add a structure related to fire protection to the intake section 11 as described above. As a structure for the fire prevention, a fireproof damper 24 is built in the intake portion 11, and when the exhaust gas sucked into the intake portion 11 has a temperature higher than a certain temperature, the fire damper 24 is operated to keep the temperature higher than a certain temperature. The exhaust gas is prevented from flowing into the exhaust duct 2. As another structure for fire protection,
A grease filter 25 is provided in the intake portion 11 and is captured by the grease filter 25, so that the oil component in the exhaust 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]

As described above, in the exhaust system of Japanese Patent Application No. 2002-099758, a grease filter is provided as one of the structures related to fire prevention. This grease filter has a function of separating and collecting oil in the exhaust gas in order to prevent it from flowing into the exhaust duct. As a result, oil will accumulate over time, and it is necessary to change or clean it regularly. However, in the exhaust device of Japanese Patent Application No. 2002-099758, the grease filter is provided at the connection end of the intake portion to the exhaust duct, and is located on the ceiling above which the exhaust duct passes. For this reason, it is necessary to replace or clean the grease filter from a work port provided on the ceiling, which increases the work load. In particular, in the structure in which the intake portion is made thin to improve the intake efficiency like the exhaust device of Japanese Patent Application No. 2002-099758, the amount of oil recovered by the grease filter increases, and the frequency of replacement and cleaning of the grease filter is increased. Since the cost becomes higher, the work load becomes heavier. Therefore, it is required to replace and clean the grease filter more easily.

The present invention has been made in order to meet such a requirement, and the exhaust system proposed in Japanese Patent Application No. 2002-099758 is improved so that the grease filter can be easily replaced or cleaned. The purpose is to do.

[0017]

In order to achieve the above object, according to the present invention, an intake section connected to an exhaust duct has its suction end faced from above to a heating section of a table with a heating section. In the exhaust device for individual exhaust of the table with the heating / cooking unit, the exhaust to the heating / cooking unit can be performed for each table with the heating / cooking unit by suctioning through the end. And the suction end is formed only by the tip opening of the pipe, and the size of the suction end is smaller than the size of the cooking unit, and the suction end rises from the cooking unit. It faces the heating and cooking section at a height position where it can wrap around the upper part of the hot air stream, and a person is placed near the table with the heating and cooking section in the middle of the intake section. A filter mounting portion is provided at a height position where it can be operated in a normal standing state, and a grease filter for separating / recovering oil contained in the exhaust gas is detachably mounted on the filter mounting portion. I am trying.

Further, in the present invention, in the exhaust device as described above, the filter mounting portion is formed so that the suction end side of the intake portion can be separated via the filter mounting portion, and when the grease filter is replaced. Or when cleaning
The grease filter can be replaced or cleaned while the suction end side is separated.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below. FIG. 1 shows a simplified structure of an exhaust device for individual exhaust of a table with a heating and 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 a filter mounting portion 30 is provided at a predetermined height position on the premise of this basic structure. First, as an outline of the basic structure, it has an intake portion 34 formed so as to be able to expand and contract by joining three pipes 31, 32, 33 having different diameters. The suction part 34 has a lower end of the pipe 33 as a suction end 35, and the opening size of the suction end 35 is smaller than the size of the heating and cooking part K of the table T with the heating and cooking part. Similar to the description of the exhaust device of FIG. 7, efficient suction / exhaust is performed.

Next, the filter mounting portion 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 and cooking unit. In the present embodiment, the lower pipe 33 is incorporated at a position near the tip thereof. Therefore, the height position of the filter mounting portion 30 is 400 to 50 from the upper surface of the table T with the heating and cooking unit.
The position is about 0 mm.

FIG. 2 shows the internal structure of the filter mounting portion 30. The filter mounting portion 30 is incorporated in the lower pipe 33 as described above. Specifically, the lower pipe 3
3 is divided into an upper member 36 and a lower member 37, and each of the upper member 36 and the lower member 37 has a short cylindrical upper cover portion 38 having a diameter larger than that of the pipe 33 by, for example, about 1.5 times. And a lower cover portion 39 are provided, and the upper cover portion 38 and the lower cover portion 39 form a filter mounting portion 30. The upper cover portion 38 and the lower cover portion 39 are configured such that the lower side of the upper cover portion 38 is fitted and overlapped with the lower cover portion 39, and the fitted portion can be fixed and fixed by a set screw 41. Has been Further, a holding shelf 42 is provided at the upper end of the lower cover portion 39, and a holding end 43 is provided at the lower end of the upper cover portion 38.
A sandwiching gap 44 is formed by the sandwiching shelf 42 and the sandwiching end 43 when the both cover parts 38, 39 are stacked.

A grease filter 45 is removably mounted on the filter mounting portion 30. Grease filter 4
As described above, 5 is a supplement to prevent the oil content in the exhaust from flowing into the exhaust duct. The grease filter 45 in the illustrated example is a filtration type, and is formed in a sandwich structure in which a well-known filter material called a demister is used as a core and wire meshes are stacked on both sides thereof. Further, this filtration type grease filter 45 is formed in a spherical shape, and a flange portion 45f is provided around the spherical shape, so that the flange portion 45f can be attached to the filter attachment portion 30 by being held in the holding gap 44. Has been done.

In the present embodiment, the fireproof damper 48 is also incorporated in such a filter mounting portion 30. The fireproof damper 48 is a butterfly type in which two semicircular damper blades 50 are provided inside a damper cylinder 49. In other words, normally, the two damper blades 50 are closed so that they overlap each other, and when the temperature exceeds a certain level, the fuse (not shown) that regulates the overlapping state of the damper blades 50 is released. The damper wing 50 opens, which causes the damper cylinder 49
Are to be closed. Here, the standard butterfly type fire protection damper 48 has a structure in which the tip of the damper blade 50 slightly projects 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 damper cylinder 4
The grease filter 45 is formed in a spherical shape so as to have a shape corresponding to the outer circumference of the semicircular damper blade 50 protruding from 9. By doing so, the grease filter 45 is attached to the filter attaching portion 30 and the fire damper 4 is attached.
8 can be built with a more compact structure.

Replacement and cleaning of the grease filter 45 in the above exhaust device are performed as follows. The grease filter 45 is normally replaced or cleaned on a regular basis, 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 this is removed from there. Next, the removed grease filter 45 is cleaned and returned again, or a previously prepared cleaned grease filter is newly attached to the lower member 37. Then, the lower member 37 is attached to the upper member 36 again, and the work is completed. The series of operations can be performed in a state in which the operator stands in a normal posture without using a stepladder or a step by the table T with the heating and cooking unit. Also, after removing the lower member 37 with the grease filter 45 still mounted,
Since the work can be performed by the procedure of removing the grease filter 45 from the lower member 37, it is possible to process the grease filter 45, which is difficult to handle due to the adherence of oil, under the condition that it is easier to work. That is, in the structure of the exhaust device as in the present embodiment, the grease filter 45 can be cleaned and replaced as a very simple work. This also applies when the fire damper 48 is inspected or reset. That is, in the structure in which the fireproof damper 48 is also incorporated in the filter mounting portion 30 as in the present embodiment, the fireproof damper 4 has the same work content as when cleaning or replacing the grease filter.
This means that the inspection and re-setting of item 8 can be performed and the work will be very easy.

FIG. 3 shows a simplified structure of an exhaust device for individual exhaust of a table with a heating and cooking section according to the second embodiment. In this embodiment, the intake unit 60 is a fixed type. That is, the intake portion 60 is formed by fixedly joining two pipes, an upper pipe 61 and a lower pipe 62. In this embodiment, the filter mounting portion 63 is provided at the connecting portion between the upper pipe 61 and the lower pipe 62. Therefore, the height position of the filter mounting portion 63 is 700 from the upper surface of the table (not shown) with the heating and cooking unit.
The position is about 800 mm. The lower pipe 62
The size of the opening of the suction end 64 at the tip of the table is made smaller than the size of the heating and cooking section of the table with the heating and cooking section, whereby efficient suction / exhaust can be achieved. It is the same.

As shown in the internal structure of FIG. 4, the filter mounting portion 63 is provided on the lower end portion of the upper pipe 61 and the upper end portion of the lower pipe 62, respectively, and is similar to the upper cover portion in the first embodiment. 65 and the lower cover portion 66, and the lower side of the upper cover portion 65 is fitted and overlapped with the lower cover portion 66, and the fitted portion can be fixed and fixed by a set screw 67. . Further, the lower cover portion 66 is detachably connected to the lower pipe 62 via the connecting tubular portion 68, and can be separated from the lower pipe 62 by loosening the set screw 69.

The filter mounting portion 63 includes an intake portion 60.
A meandering flow type grease filter 71 is used which generates a meandering flow in the exhaust gas flowing therethrough to recover oil. Although the detailed structure of the meandering-flow type grease filter 71 is omitted, the grease filter 71 is formed in a double-cylinder structure including an outer cylinder and an inner cylinder, and a meandering flow force vane is formed between the outer cylinder and the inner cylinder. It has a structure with a meandering flow forced flow path provided, and the exhaust gas flows along the meandering flow forced flow path with large meandering, so that the oil content in the exhaust gas can be efficiently separated and collected. You can do it. As such a meandering flow type grease filter, it is preferable to use, for example, the "oil recovery filter" disclosed in JP-A-2000-184968.

Since the grease filter 71 having the meandering flow type and the cylindrical structure is used as described above, the lower cover portion 66 has a support shelf 72 for mounting and supporting the grease filter 71. It is provided. Also, a grease filter 71 separates the lower side of the support shelf 72.
An oil sump 73 for accumulating the recovered oil is formed.

Replacement and cleaning of the grease filter 71 in the above exhaust device are performed as follows. Since the meandering flow type grease filter 71 has a large capacity, replacement and cleaning can be performed, for example, about once a week. When replacing or cleaning the grease filter 71, first loosen the set screw 67 to remove the lower pipe 62 from the upper pipe 61, and loosen the set screw 69 to remove the lower cover portion 66 from the lower pipe 62. Remove. Next, take out the grease filter 71 from the lower cover portion 66,
The oil sump 73 is cleaned. Then, the removed grease filter 71 is cleaned and returned again, or a previously prepared cleaned grease filter is newly attached to the lower cover portion 66. And finally the lower cover part 6
6 is attached to the lower pipe 62, and the lower pipe 62 is further attached to the upper pipe 61 to complete the work.
And, it is the same as in the case of the first embodiment that these series of operations can be performed easily.

[0030]

As described above, according to the present invention, many advantages of the exhaust system proposed in Japanese Patent Application No. 2002-099758 can be utilized, and the grease filter can be easily cleaned and replaced. As a result, it is possible to realize an exhaust device that is even easier to use.

[Brief description of drawings]

FIG. 1 is a diagram showing a simplified configuration of an intake section of an exhaust device according to a first embodiment.

FIG. 2 is a diagram showing a simplified internal structure of a filter mounting portion suction in the exhaust device of FIG.

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 diagram showing a simplified internal structure of the filter mounting portion suction in the exhaust device of FIG.

FIG. 5 is a diagram showing a simplified overall configuration of a conventional exhaust system.

FIG. 6 is a diagram showing a simplified overall configuration of an improved conventional exhaust system.

FIG. 7 is a diagram showing a simplified configuration of an intake section in the exhaust system of FIG. 6 together with its internal structure.

[Explanation of symbols]

2 exhaust duct 11, 34, 60 Air intake 12, 35, 64 Suction end 30, 63 Filter mounting part 45, 71 Grease filter K cooking section T Table with cooking section

Claims (2)

(57) [Claims] 1. An exhaust gas for the heating and cooking section, wherein an intake section connected to an exhaust duct has its suction end facing the heating and cooking section of the table with the heating and cooking section from above and sucking through the suction end. In the exhaust device for individual exhaust of a table with a heating / cooking unit, the suction unit is formed of a pipe, and the suction end is an opening of a tip of the pipe. The size of the suction end is smaller than the size of the cooking section,
The suction end faces the heating and cooking section at a height position where it can enclose the upper part of the hot air stream rising from the heating and cooking section, and further, in the middle of the intake section, the table with the heating and cooking section. A filter mounting part is provided at a height position where a person can operate in a normal standing state by the side, and the filter mounting part separates the oil contained in the exhaust gas.
An exhaust device for individual exhaust of a table with a heating and cooking section, wherein a recovery grease filter is detachably attached. 2. The filter mounting portion is formed so that the suction end side of the intake portion can be separated via the filter mounting portion, and the suction end side is separated when replacing or cleaning the grease filter. The exhaust device for individual exhaust of a table with a heating and cooking unit according to claim 1, wherein the grease filter can be replaced or cleaned in this state.