JP3460996B2 - Exhaust device for individual exhaust of table with cooking unit - Google Patents

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. A typical typical configuration of such an exhaust system is shown in FIG. 3 in a simplified form. 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.

[0003]

As described above, in the conventional individual exhaust device for the table with the heating / 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.

The present invention has been made in view of the above circumstances in the conventional individual exhaust device for a table with a heating / cooking section, and is as described above in the conventional individual exhaust device for a table with a heating / cooking section. The purpose is to eliminate such problems.

[0008]

The inventor of the present invention questioned the hood structure in the conventional exhaust system as described above, and conducted various experiments on the individual exhaust for the table with the heating and cooking section. As a result, for local exhaust such as exhausting smoke or hot air from the heating / cooking part of the table with a heating / cooking part, it is not effective to make the intake part a hood structure, and conversely the opening size of the suction end is changed. It has been found 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. is there. A practical guideline is given as 1/3 or less of the size of the cooking section.

Therefore, according to the present invention, the intake section connected to the exhaust duct has its suction end faced from above toward the heating and cooking section of the table with the heating and cooking section, and suction is performed through this suction end, whereby the heating and cooking is performed. Exhaust to the parts can be made for each table with the heating and cooking section,
In an exhaust device for individual evacuation of a table with a heating / cooking unit, the suction unit is formed of a pipe, and the suction end is formed only by a tip end opening of the pipe, and the size of the suction end is different from that of the heating / cooking unit. The size is smaller than the size, and the suction end faces the cooking section at a height position that can enclose the upper part of the hot air stream rising from the cooking section.

Further, according to the present invention, in the exhaust device as described above, the size of the suction end is 1/3 of the size of the cooking section.
The following conditions are preferable conditions.

Further, according to the present invention, in the exhaust device as described above, it is preferable that the intake portion is formed so that its suction end moves up and down.

Further, according to the present invention, in the exhaust device as described above, it is possible to expand and contract by joining pipes having different diameters, and the intake part is formed so as to vertically move the suction end by this expansion and contraction. Use the preferred configuration.

Further, according to the present invention, in the exhaust device as described above, it is preferable that the diameter of the upper pipe is larger than the diameter of the lower pipe.

Further, according to the present invention, in the exhaust device as described above, by winding the connecting wire around the lowermost pipe, the lowermost pipe is raised so as to enter the pipe of the next stage, and this rising is performed. Accordingly, the stopper portion provided on the lowermost pipe is brought into contact with the lower end of the pipe of the next stage to raise the pipe of the next stage so as to enter the pipe above it, thereby sequentially raising each pipe, It is preferable that the intake portion is formed so as to perform a contraction operation during expansion and contraction.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below. 1 and 2 show a simplified configuration of an exhaust device for individual exhaust of a table with a heating and cooking unit according to an embodiment.
As shown in FIG. 1, the exhaust device according to the present invention includes an exhaust blower 1 and an exhaust duct 2 connected to the blower 1 and passed through the back of the ceiling S, as in the conventional exhaust device.
The exhaust duct 2 has an intake section 1 which characterizes the present invention.
1 is connected via its connecting end 11t, and the suction end 12 of this intake part 11 is made to face the heating cooking part K (FIG. 2) of the table T with the heating cooking part from above and the heating cooking part K from Performs local suction and exhaust of smoke and hot air.

The intake section 11 has three different diameters.
It is formed so that it can be expanded and contracted by joining together the book pipes 13, 14, and 15. That is, the lower pipe 1
3. The diameter of the middle pipe 14 and the upper pipe 15 is gradually increased in this order, the lower pipe 13 is inserted into the middle pipe 14, and the middle pipe 14 is inserted into the upper pipe 15. It is formed so that it can be expanded and contracted by a mechanism described later. Here, the pipes 13, 14, and 15 are usually made of a material having high fire resistance, such as an aluminum material or a stainless steel material.

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 way 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 lower pipe 13 has a suction end 1 at its tip.
The size of the suction end 12, more specifically, the opening size R thereof is smaller than the size W of the heating and cooking unit K. The opening size of the suction end 12 is set in this way, as shown in FIG. 2, the hot air flow H rises from the heating and cooking unit K in a pattern like a candle flame, and the heating and cooking unit K This is because it is possible to efficiently suck and exhaust the smoke and hot air from the heating and cooking unit K by utilizing the fact that the smoke 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. The upper end of the hot air flow H is the suction end 1
It is sufficient that the area covered by 2 is slightly wider than the width 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 1/3 or less of the size of the heating and cooking section K. In the example of the drawing, the heating cooking section K is a charcoal-burning stove, and the diameter size W of the grill M of the charcoal-burning stove K is 250 mm, while the opening size R is 50 mm. It is set to 1/5 of the size.

In the lower pipe 13 whose tip is the suction end 12, the oil rising from the charcoal stove K is used for each pipe 1.
It is usual to provide a grease reservoir 16 at the tip end portion to prevent the grease reservoir 16 from sticking to the inner surfaces of the 3, 14, 15 and dropping off.
Therefore, the diameter of the lower pipe 13 is increased by the amount of the grease reservoir 16 added. However, it is sufficient that the width of the grease reservoir 16 is, for example, about 15 mm. Therefore, the diameter of the pipe 13 in this example is about 80 mm, which is the sum of the opening diameter of the suction end 12 of 50 mm and the width of the grease reservoir 16 of 15 mm.

As described above, the air intake portion 11 can be expanded and contracted by joining the three pipes 13, 14, 15 having different diameters. 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 the middle pipe 1
4, the stopper portion 19 provided on the lower pipe 13 comes into contact with the stopper portion 20 at the lower end of the middle pipe 14 due to the rise of the pipe 13, and accordingly the middle pipe 14 is Stopper part 2
A contraction operation in expansion and contraction is performed by raising 0 so as to enter the upper pipe 15 until it comes into contact with the stopper portion 21 at the lower end of the upper pipe 15.
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. Although illustration is omitted, an operation switch is extended from a control system for controlling the drive means 18, and the operation means allows the operation of the drive means 18 to be performed remotely.

Here, the stopper portion 2 of the middle pipe 14
0 and the stopper portion 21 of the upper pipe 15 are
The function of a sliding contact guide for smoothing the vertical movement of the pipe 14 in the above-mentioned expansion and contraction operation is also imposed. Specifically, the stopper portion 20 and the stopper portion 21
Are slightly projected from the inner side surfaces of the pipe 14 and the pipe 15, respectively, and the end surfaces of the protruding portions are slidably contacted with the outer side surfaces of the pipe 13 and the pipe 14, respectively. It is designed to guide the vertical movement of the fourteen. In addition to this, the pipe 14 and the pipe 15 have auxiliary sliding contact guide portions 2 on their inner surfaces.
2 and 23 are provided, and this auxiliary sliding contact guide portion 2 is provided.
Numerals 2 and 23 assist the guide by the above-mentioned sliding contact between the stopper portion 20 and the stopper portion 21. That is, the vertical movement of the pipe 13 in the expansion and contraction operation of the intake portion 11 is guided by the two-point support sliding contact between the stopper portion 20 and the auxiliary sliding contact guide portion 22. It is adapted to be guided by a sliding contact of two-point support by the contact guide portion 23.

This is related to the structure in which the pipe 13 is cantilevered by the single wire 17. That is, the wire 17 can be laid along the inner side surface of the pipe by cantilevering the pipe 13 with only one wire 17. As a result, it is possible to effectively prevent the wire 17 from interfering with the exhaust flow in the intake section 11 and making a noise.
On the other hand, when the pipe 13 is cantilevered by the single wire 17, the smooth vertical movement of the pipe 13 may be hindered. I try to avoid this by using it as a guide.

The suction part 11 is expanded and contracted as described above, and the expansion and contraction allows the suction end 12 to move up and down. Therefore, for the sake of aesthetics of the store where the table T with the heating / cooking section is installed, the suction end 12 is pulled up when the heating / cooking section K is not used, and when the heating / cooking section K is used. Suction end 12
Is lowered to an appropriate height so that the cooking section K can be efficiently sucked and exhausted. As described above, the height position of the suction end 12 with respect to the table T with the heating and cooking section is the height position at which the suction end 12 wraps the upper end of the hot air flow H, and the heating and cooking section K is a charcoal stove. In some cases, it is usually about 150 to 200 mm.

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 usually provided at the connecting end 11t of the intake portion 11 as shown in the figure.

As described above, in the exhaust system according to the present invention,
The hot air stream rising in a pattern like a candle flame from the heating and cooking section is effectively used and sucked to exhaust the heating and cooking section, and there is considerable turbulence in the surrounding air. Also, it is possible to perform suction / exhaust without leakage without disturbing the suction flow. Further, in the exhaust device according to the present invention, in order to perform such efficient suction / exhaust, the size of the suction end 12 of the suction unit 11 can be made extremely small, for example, about 80 mm. Therefore, as described above, the suction end 12 of the intake unit 11
It can be said that, even if is located at a height position of about 150 to 200 mm from the table T with the heating / cooking section, the intake section 11 hardly interferes with eating and drinking around the table with the heating / cooking section.

Further, since the size of the suction end 12 of the intake portion 11 can be reduced, the air volume for suction / exhaust can be reduced. Specifically, with the air intake portion 11 according to the present invention, an air volume of, for example, about 300 m3 / hour is sufficient. This is a large air volume as compared with the conventional hood-type suction portion that requires an air volume of about 500 m3 / hour. Will decrease.
Then, by reducing the exhaust air volume as described above, the circulation amount of the air in the room can be significantly reduced, and the air conditioning cost can be reduced.

Further, even if the suction end 12 of the suction portion 11 can be moved up and down, the wire can be moved up and down by a simple mechanism including the wire and the driving means for winding and unwinding the wire. Therefore, the structure for making it movable can be simple.

In the embodiment described above, the intake portion is formed so that it can be expanded and contracted by joining three pipes having different diameters. However, various other configurations are possible in implementing the present invention. The form is possible. For example, a configuration in which the intake portion is formed by a single straight pipe or a configuration in which the intake portion is formed by a single trumpet-shaped pipe is possible, and a structure in which the intake portion can be freely bent is provided. It is also possible to adopt a form in which the suction end of the intake portion can be freely positioned due to its bendability.

[0030]

As described above, according to the present invention, the individual exhaust to the table with the heating / cooking unit can be performed more efficiently than the conventional exhaust. Further, the size of the suction end of the intake section can be made extremely small, and it is possible to effectively avoid the intake section from interfering with eating and drinking around the table with the heating and cooking section. Also, by reducing the size of the suction end of the intake part, it is possible to reduce the amount of air for exhaust, which makes it possible to reduce the cost of air conditioning, and to move the suction end of the intake part up and down. A simple one can be used, and the cost for making it movable can be reduced.

[Brief description of drawings]

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

FIG. 2 is a diagram showing a simplified configuration of an intake section in the exhaust system of FIG. 1 together with its internal structure.

FIG. 3 is a diagram showing a simplified overall configuration of a conventional exhaust system.

[Explanation of symbols]

2 exhaust duct 11 Intake section 12 Suction end 13 Lower pipe 14 Middle pipe 15 Upper pipe 17 wires 19 Stopper K cooking section T heating cooker

Claims (6)

(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,
Further, the suction end is exposed to 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 an exhaust device for individual exhaust of the table with the heating and cooking section. . 2. The exhaust device for individual exhaust of a table with a heating and cooking unit according to claim 1, wherein the size of the suction end is 1/3 or less of the size of the heating and cooking unit. 3. The exhaust device for individual exhaust of a table with a heating and cooking unit according to claim 1 or 2, wherein said intake unit is formed so that its suction end moves up and down. 4. The suction part is formed so as to be able to expand and contract by joining together pipes having different diameters, and the expansion and contraction allows the suction end to move up and down.
An exhaust device for individual exhaust of a table with a heating and cooking section according to. 5. The exhaust device for individual exhaust of a table with a heating and cooking unit according to claim 4, wherein the diameter of the upper pipe is larger than the diameter of the lower pipe. 6. The intake section is moved up so that the pipe at the lowermost stage enters the pipe at the next stage by winding a wire connected to the pipe at the lowermost stage. The stopper portion provided on the pipe makes contact with the lower end of the pipe of the next stage and raises the pipe of the next stage so as to enter the pipe above it, thereby performing a contraction operation during expansion and contraction. An exhaust device for individual exhaust of a table with a heating and cooking unit according to claim 5, which is formed as described above.