JPH0411641Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> The present invention relates to a smokeless and odorless roaster for grilling meat, fish, vegetables, etc. on an iron plate (rostle).

<Conventional technology> Generally, a roaster (yakiniku ware) such as a yakiniku restaurant etc.
The biggest problem in a room with a large number of
This is the smoke and smell that rises from grilled meat, etc. As a solution to this smoke and odor, in the old days an exhaust gas suction port was installed on the side of the heating chamber in which the heated items of each roaster were placed, and this exhaust gas was guided outside through a duct that was centrally piped below the machine. , but this was impractical due to high equipment costs. For this reason,
In recent years, the mainstream has become a type in which each aircraft (single roaster) is equipped with a device that can eliminate smoke and odor within the aircraft itself. For example, as shown in FIG. 7, an exhaust gas suction port 3 is simply provided on both sides of the heating chamber 2, which is the upper part of the roaster 1, and a suction fan 4 facing the suction port 3 is provided.
The structure employs a circulation method in which exhaust gas that has flowed into a duct 5 with It mixes with the combustion gas in chamber 7 and becomes colorless due to the high temperature atmosphere.
It decomposes into odorless gas.

<Problems to be solved by the invention> However, in the above type, the flow rate of exhaust gas passing through the rostre 1 is equal to the flow rate of the exhaust gas sucked in by the suction fan 4 through the suction port 3 and the flow rate of external fresh air through the burner 6. The flow rates of the supplied combustion gas and combustion air are added. Therefore, the speed of the gas passing through the roaster 1 is high, and a part of the exhaust gas is not circulated to the combustion chamber 7 but instead flows into the heating chamber 2.
It will be emitted directly to the outside and will rise as smoke and odor.

In addition, since the amount of gas released outside the heating chamber 2 is large and the gas velocity is high, when placing an object to be heated on the upper part of the roaster 1, the hands feel hot.

Furthermore, when baking the object to be heated, it is necessary to maintain the temperature of the combustion chamber at a temperature sufficient to bake the object. If the amount of air supplied exceeds the amount of air required for combustion of the combustion gas, it is necessary to heat the excess air to the temperature of the combustion chamber, resulting in a loss of heat by the amount of heating.

In view of the above-mentioned circumstances, this invention has been devised by directly performing smoke and deodorizing effects using a catalyst body installed independently of the combustion chamber, and by circulating a portion of the purified exhaust gas that has been smoked and deodorized back to the suction port. The object of the present invention is to provide a high-performance, energy-saving, and safe smokeless and odorless roaster that reduces the flow rate of exhaust gas from the roaster opening.

<Means for Solving the Problems> The present invention has a rostol placed on a combustion chamber equipped with gas burners on both sides, and a heating chamber formed on the upper part of the rostol for baking an object to be heated. An exhaust gas suction port is provided at the back of the gas burner, and the suction port communicates with a ceramic honeycomb catalyst for smoke and deodorization arranged at the back of the gas burner. A circulation exhaust passage is formed by a suction fan, and a discharge exhaust passage that turns back toward the upper part of the machine body, and the discharge ports of the circulation exhaust passage face the upper sides of both sides of the heating chamber, and are located at the front stage on the suction side of the honeycomb catalyst. A catalyst heating element is placed at the top.

<Function> Due to the above structure, smoke and odors rising from the meat and other heated objects placed on the roaster are sucked in through the suction ports provided on both sides of the heating chamber, and the rear side is turned sideways. It passes through the honeycomb holes of the manufactured honeycomb catalyst body. In this case, the honeycomb catalyst body is preheated to about 750 to 800 degrees Celsius by a catalyst heating element such as a gas burner installed in the previous stage, so the catalytic action of the ceramic works, and smoke and odor are removed and the exhaust gas is purified. (Hot air) is discharged from the discharge port on the side of the heating chamber through the circulation exhaust path due to the action of the suction fan. However, since this discharge port is located above the suction port, a portion of the hot air is sucked into the suction port, and that amount of hot air is not discharged to the outside.

<Example> Hereinafter, the present invention will be described in detail based on the drawings of the example.

Reference numeral 11 designates a combustion chamber with a water tank 12 at the bottom and flame blowing slits 13 on both sides of the top, serving as an inner box. A heating chamber 15 with an opening 15a at the upper side for baking is provided, and a large number of exhaust gas suction ports 16 are bored in the lower portions 15b on both sides of the heating chamber 15, and a ceramic cylinder supported by an inner frame 17a is provided at the back of the suction ports 16. A honeycomb catalyst body 18 for smoke removal and deodorization is arranged over a predetermined width so that the honeycomb holes 18a are oriented horizontally. A gas burner 2 is provided outside the flame blowing slit 13 at the front lower part of the inlet hole 19 of the honeycomb catalyst body 18.
The crater 21' that is bored on the back side of the crater 2 is facing the crater 21'.
1' serves as a catalyst heating body 22. Reference numeral 23 denotes an inner frame 17a and a middle frame 1 that are connected to the back of the honeycomb catalyst body 18.
7b, the suction and exhaust path 2
A suction fan 24 is provided below the body of No. 3, and the discharge side of the suction fan 24 is an upwardly facing discharge exhaust passage 25 formed by the inner frame 17b and the outer frame 17c, and the discharge exhaust passage 25 and the suction exhaust passage 23 are Circulation exhaust passage 26
and a discharge port 2 provided at the upper end of the circulation exhaust path 26.
7 are placed facing the upper portions 15c on both sides of the heating chamber 15, and the whole becomes a smokeless and odorless type roaster 28. In the figure, numeral 29 is a spark plug placed at the lower edge of the nozzle 21 of the gas burner 20, and 30 is an ignition sensor placed at the upper edge of the nozzle 21' which becomes the catalyst heating element 22.

To explain this function now, first, when using this roaster 28, the gas burner 20 is ignited and the honeycomb catalyst body 18 itself is heated to about 750 to 800 degrees Celsius by blowing flame from the crater 21'. In addition, the suction fan 24 located below the fuselage is driven to open the suction port 16.
Make sure to obtain negative pressure in the area.

Here, if an object to be heated such as meat (not shown) is placed on the roaster 14, the gas burner 2
Since the roaster 14 is heated by the flame emitted from the crater 21 and its hot air, the object to be heated will be burned.

In this case, the exhaust gas a mixed with smoke rises due to the burning, but since the suction ports 16 on both sides of the heating chamber 15 are under negative pressure, the exhaust gas a
is sucked into the suction port 16 and flows through the honeycomb holes 18a of the rear honeycomb catalyst body 18. This honeycomb catalyst body 18 is heated to a high temperature (750℃
~800°C), and by the catalytic action of the ceramics that make up the honeycomb, smoke and odor are burnt and turned into smokeless and odorless exhaust gas a', which is then sent from the suction exhaust passage 23 to the suction fan 24.
The flow then flows upward in the discharge exhaust passage 25 and is exhausted from the discharge port 27, which is connected to the heating chamber 1.
Since it has a horizontal passage 27a facing toward the 5th side, the exhaust gas a', which is only hot air, flows sideways, and a part of it is sucked in again into the suction port 16 located at the bottom of the exhaust gas a', and is released into the atmosphere (chamber) through the opening 15a. The amount is approximately 60%. Therefore, the upper part of the combustion chamber 11 does not get hotter than necessary, and your hands will not feel hot when placing an object to be heated. Of course, this exhaust gas a' released into the atmosphere is smokeless and odorless, and there is no risk of raising the room temperature more than necessary.

Further, the means for heating the honeycomb catalyst body 18 is
In addition to using the main gas burner 20 as described above, for example, as shown in FIG. The catalyst heating element 22 may also be used as a catalyst heating element 22. Furthermore, as shown in FIG. 6, an electric heater 33 may be arranged at a position upstream of the inflow hole 19, and this may be used as the catalyst heating body 22. In short, the honeycomb catalyst body 18
It only needs to be heated to 700°C or higher, and based on this, a catalytic action is activated to remove smoke and odor.

<Effects of the invention> As mentioned above, the smokeless and odorless roaster of the present invention uses a ceramic honeycomb that generates high temperature from the suction port which receives negative pressure from the action of the suction fan to remove odors and smoke rising into the heating chamber above the roaster. Purified through a catalytic body,
In addition, by configuring the exhaust gas to be discharged to the upper part of the suction port, the exhaust gas is reliably purified and made colorless and odorless. That is, reliable purification effect is brought about by the following.

First, the amount of gas that passes through the rostre is only combustion gas, which is small in quantity, so the flow rate of exhaust gas discharged to the outside through the heating chamber is low. Therefore, when exhaust gas is sucked in from the suction port on the side of the heating chamber, it is difficult for the exhaust gas to be discharged to the outside.

Secondly, there is a discharge port for the purified exhaust gas above the suction port, and the upper part of the unpurified exhaust gas is shielded by the purified exhaust gas, making it even more difficult for the unpurified exhaust gas to be discharged to the outside.

Thirdly, the untreated exhaust gas captured and inhaled in the above manner can be appropriately heated.
Further, due to the action of the honeycomb catalyst body, purification can be reliably performed at a relatively low temperature.

The first and second advantages mentioned above are obvious when compared with the existing method shown in FIG. However, if the catalyst is installed between the suction fan and the burner using the method shown in Figure 7,
There is also a method known as a complete combustion method, but it is not sufficiently effective because the temperature cannot be raised to a temperature that allows sufficient catalytic action.

Note that this catalyst can be used continuously within the lifetime of the catalyst as long as the temperature of the passing gas is high enough, and can be said to be maintenance-free.

This is a major advantage compared to the conventional electrostatic precipitator method, which requires cleaning of oily smoke adhering to the electrode plates.

In addition, by arranging the discharge port of the circulation exhaust path of the present invention in parallel to the upper part of the suction port arranged on the side of the heating chamber, a part of the purified exhaust gas (hot air) flows back toward the suction port. , emissions into the heating chamber opening can also be minimal (approximately 60%). By sucking the purified exhaust gas through the suction port, suction of fresh air from the outside is inhibited, resulting in an effect of reducing the amount of air sucked. Therefore, the amount of heating energy for purifying exhaust gas can be minimized, and there is no need to place an excessive load on indoor cooling equipment. Furthermore, since the structure is simple, it is compact and has practical effects such as not causing failure or damage during long-term use.

[Brief explanation of the drawing]

Fig. 1 is a vertical side view of the main part of the present invention, Fig. 2 is a longitudinal front view of the same, Fig. 3 is an enlarged side view of the honeycomb catalyst body, Fig. 4 is a slope view of the honeycomb catalyst body, and Fig. 5
FIG. 6 is an explanatory diagram showing another embodiment of the catalyst heating body, and FIG. 7 is a longitudinal sectional side view of the main part of a conventional product. 11... Combustion chamber, 14... Losttle, 15...
Heating chamber, 16... Suction port for exhaust gas, 18... Honeycomb catalyst body for smoke removal and deodorization, 24... Suction fan, 26... Circulation exhaust path, 27... Discharge port.

Claims (1)

[Scope of utility model registration request] Exhaust gas suction ports are provided at the bottom of both sides of the heating chamber for burning the object formed through the rostle on the combustion chamber, which is equipped with gas burners on both sides, and a horizontal honeycomb catalyst body for smoke and deodorization is installed in the suction port. At the same time, the tip outlet of the discharge exhaust passage of the double circulation exhaust passage formed on the outside, which is the back part of both honeycomb catalyst bodies, with a suction fan interposed in the middle, is connected to the upper part of the exhaust gas inlet. A smokeless and odorless type roaster comprising: a catalyst heating body including a gas burner, an electric heater, etc. installed at the back of the gas burner position which is the front part of the honeycomb catalyst body.