JP3626953B2 - Exhaust gas cooling structure of smokeless roaster - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a flue gas cooling structure for a smokeless roaster in which outside air is introduced to lower the temperature of exhaust gas in a high temperature state to prevent internal overheating.
[0002]
[Prior art]
Conventionally, in a smokeless roaster, high-temperature combustion exhaust gas, smoke, etc. (hereinafter referred to as exhaust gas) generated during cooking of grilled meat and the like are sucked into the suction channel from the top ring suction hole, After the oils and fats and oil mist are adsorbed and filtered by the recovery device, they pass through the external deodorizing device through the exhaust duct and are removed to the outside by dust removal.
In addition, as a monitoring device to check the cleaning inspection time, etc., the roaster operating time is integrated, the temperature sensor of the outer casing is installed, and functions such as use warning and emergency gas shutoff are provided, such as fire accidents etc. Some measures have been taken to prevent this, and the temperature is constantly monitored with the temperature sensor for the outer casing, the intake air from the top ring is insufficient, the exhaust duct system is blocked, and overheating due to a fire in the exhaust path As an operation as a safety device, a gas shutoff, buzzer warning, fire damper, and exhaust fan linked operation functions are provided.
[0003]
We do not conduct prior art searches at the research and development stage or the application stage, and do not know the prior art documents to be described.
[0004]
[Problems to be solved by the invention]
However, since the above monitoring device is a device for monitoring and warning of the roaster situation, proper daily cleaning and inspection is indispensable. However, if it is neglected, fats and oils accumulate in the fat and oil collecting device. Or the exhaust duct system is blocked, the amount of air sucked from the top ring is insufficient, and the inner and outer boxes in the smokeless roaster become overheated. Under such circumstances, a bonfire phenomenon occurs on the adjusted combustion surface. In such a case, there are issues that must be solved, such as a high risk of direct fire or high-heated combustion gas directly hitting the oil recovery unit, igniting the oil and fat accumulated on a daily basis, and causing a duct fire. there were.
[0005]
[Means for Solving the Problems]
In view of the problem that the inner and outer boxes in the smokeless roaster are overheated based on the above-described prior art, the present invention arranges the inner box inside the outer box having the upper opening disposed below the table. The crown member is placed above the gap between the inner peripheral surface of the opening formed in the table and the upper portion of the inner box, and the upper portion of the suction space formed between the outer box and the inner box is placed on the crown member. A partition wall provided in the lower part is used to divide the inside and outside parts, and the exhaust part suction hole is formed in the exhaust part suction passage of the inner part, and the outside air suction opening is formed in the outside part suction passage of the outer part. The outside air is sucked into the outside air suction flow path from the suction opening and flows along the inner wall surface of the outer box, and the exhaust gas in a high temperature state from the inner peripheral portion does not directly contact the inner surface of the outer box, By preventing the oils and fats contained in the exhaust gas from adhering to the And the like, to solve the above-mentioned problems.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described below with reference to the drawings.
1 and 2 are enlarged cross-sectional views of the main parts of two types of smokeless roasters equipped with an exhaust gas cooling structure according to the present invention, in which an outer box 3 is arranged below a table 2 above the smokeless roaster 1 and An upper opening 5 is formed in the upper portion of the box 3, a peripheral wall 6 is formed on the outer peripheral side of the upper opening 5, and an upper end of the peripheral wall 6 is disposed in the opening 4 of the table 2. . Further, an inner box 7 having an upper opening is disposed inside the outer box 3, a heating unit 8 is disposed in the inner box 7, and a heating net, a rooster, or the like is placed above the heating unit 8. The cooking device 8a is arranged.
[0007]
A crown member 9 is placed above the gap between the inner peripheral surface of the opening 4 in the table 2 and the upper portion of the inner box 7, and is disposed between the outer box 3 and the inner box 7 below the crown member 9. The partition wall 11 is provided, the inner part of the suction space 10 from the partition wall 11 is defined as the exhaust gas suction channel 10a, the outer part is defined as the outside air suction channel 10b, and the combustion exhaust gas and the combustion are burned on the outer wall part of the exhaust gas suction channel 10a. The smoke suction holes 12, 12 a... Are formed, and the outside air (indoor air) suction opening 13 is formed at the upper part or outside of the outside air suction flow path 10 b to form the exhaust gas cooling structure according to the present invention.
[0008]
Hereinafter, the exhaust gas cooling structure according to the present invention will be described in detail.
In the first embodiment shown in FIG. 3, the peripheral wall 6 in the outer box 3 is expanded on the upper end side so as to be in contact with the inner peripheral surface of the opening 4 in the table 2, and the opening in the table 2. The crown member 9 is constituted by a mounting ring 14 installed in the inner ring 4 and a top ring 15 disposed in the upper part of the inner box 7.
The mounting ring 14 forms a mounting step portion 17 of the top ring 15 on the inner peripheral portion of the flange portion 16 on the outer peripheral side, and the inner peripheral side portion of the mounting step portion 17 serves as the partition wall 11. A plurality of holes formed in the portion 16 are used as the suction openings 13. Further, in the partition wall 11, a vertical portion 11b is continuously formed downward from the lower end side of the inclined portion 11a inward and downward.
The top ring 15 has the suction holes 12, 12 a... Formed in the inclined wall 19 continuously formed outward and upward from the upper end of the inner standing peripheral wall 18 in surface contact with the upper end of the inner box 7. A seating wall 20 to the mounting step portion 17 of the mounting ring 14 is suspended from the outer peripheral portion 19.
An annular top visor 21 is disposed outside the top ring 15, and the top visor 21 is an inclined portion 23 inward and upward from the upper portion of the seating wall 22 to the mounting step portion 17 of the mounting ring 14. Are integrally formed.
[0009]
In the second and third embodiments shown in FIGS. 4 and 5, the mounting ring 14 and the top ring 15 are the same as those in the first embodiment, but suction is performed on the upper end side of the peripheral wall portion 6. An opening 13 is formed, and the suction opening 13 is a plurality of holes provided in the peripheral wall 6 as shown in FIG. 4, or between the peripheral wall 6 and the mounting ring 14 as shown in FIG. In the former case, the upper end portion of the peripheral wall portion 6 is in contact with the inner peripheral surface of the opening portion 4 of the table 2, and in the latter case, the upper end portion of the peripheral wall portion 6 is the inner peripheral surface of the opening portion 4 of the table 2. More separated.
In the third embodiment shown in FIG. 5, the lower surface of the table 2 and the upper surface of the outer box 3 are in contact with each other, and a suction opening 13 is formed on the upper end side of the peripheral wall 6, and the opening 4 in the table 2 is formed. The outside air supply hole 24 opened at the inner peripheral surface is formed.
[0010]
A connecting cylinder 26 is formed in the lower part of the outer box 3 to open the outer box 3 downward, and an outward folding portion 27 is formed in the lower part of the connecting cylinder 26.
On the other hand, at the upper end of the exhaust duct 28 erected from under the floor, an upper-opening oil and fat recovery box 29 is attached to the lower part of the connecting cylinder 26 so as to be vertically movable, and an oil and fat adsorbing body 30 is disposed in the oil and fat recovery box 29. doing.
In addition, a moving duct 31 is provided on the upper portion of the oil and fat recovery box 29 so as to be movable up and down, and an expanded portion 32 corresponding to the turned-up portion 27 of the connecting cylinder 26 is formed on the upper portion of the moving duct 31. In addition, an air introduction opening 33 that can be expanded and contracted is formed between the expanded portions 32.
[0011]
Then, due to the suction force acting on the exhaust duct 28, the exhaust gas containing mist such as smoke and oil particles rising from the vicinity of the food placing means 8a is sucked from the suction holes 12, 12a. 10, flows into the oil collection box 29 through the connecting cylinder 26, and the oil and fat adsorbent 30 removes oil and fat, oil mist and the like and flows into the exhaust duct 28 to perform dust removal processing and the like. After that, it will be discharged outside.
[0012]
The smokeless roaster itself may have either a parallel configuration as shown in FIG. 1 or a serial configuration as shown in FIG.
[0013]
Next, the operation of the smokeless roaster exhaust gas cooling structure according to the present invention will be described.
The outside air is sucked into the outside air suction channel 10b from the suction opening 13 or the outside air supply path 25 and the gap 24 by the suction force acting on the exhaust duct 28, and is drawn downstream. Since the gas flows along the inner wall surface of the outer box 3, an external air layer is formed between the outer box 3 and the exhaust gas in a high temperature state from the exhaust gas suction passage 10a, and the exhaust gas contacts the inner surface of the outer box 3. The oil and fats contained in the exhaust gas do not adhere to the inner surface, and the outer box 3 does not overheat. That is, the oils and fats contained in the exhaust gas adhere to the inner wall surface of the partition wall 11 in the crowned member 9 (mounting ring 14) that is routinely cleaned.
Particularly in the case of the first embodiment, the presence of the top visor 21 causes the exhaust gas to be guided to the suction holes 12, 12 a... And hardly be sucked from the suction opening 13.
In addition, by reducing the diameter of the peripheral wall portion 6 and the partition wall 11 on the lower end side, the exhaust gas suction channel 10a and the outside air suction channel 10b are narrowed, and the suction acting on the suction holes 12, 12a. Improve power.
[0014]
In the exhaust passage passage process, the exhaust gas in the high temperature state is mixed with the low temperature outside air to lower the temperature, and further the temperature is decreased by the outside air sucked from the air introduction opening 33, so that the oil mist is liquefied. The adsorbent 30 enables efficient adsorption removal.
However, the outside air is sucked into the moving duct 31 from the air introduction opening 33 and drawn downstream, but flows along the inner wall surface of the moving duct 31 and the oil collection box 29. An external air layer is formed between the exhaust gas from the connection box 26 of the recovery box 29 and the outer box 3 so that the exhaust gas does not directly contact the inner surface of the moving duct 31 and the oil recovery box 29 and is contained in the exhaust gas on the inner surface. Does not adhere
Further, since the exhaust gas suction of the plurality of smokeless roasters 1 is performed by one exhaust fan (not shown), a difference occurs in each suction force, so that the suction force required for the smokeless roaster 1 having the lowest suction force is generated. If the output of an exhaust fan (not shown) is increased in order to provide the air, excessive outside air (room air) is sucked from the suction holes 12, 12 a. The air introduction opening 33 between the connecting cylinder 26 on the outer box 3 side and the moving duct 31 in each smokeless roaster 1 is expanded and the amount of outside air suction from the air introduction opening 33 is adjusted. Thus, the suction force of all the smokeless roasters 1 is made substantially constant.
[0015]
【The invention's effect】
In short, in the present invention, the inner box 7 is disposed inside the outer box 3 having the upper opening 5 disposed below the table 2, and the inner peripheral surface of the opening 4 formed in the table 2 and the inner box 7. The crown member 9 is placed above the upper gap of the inner wall, and the upper part of the suction space 10 formed between the outer box 3 and the inner box 7 is inwardly and outwardly separated by a partition wall 11 provided at the lower part of the crown member 9. The exhaust gas suction passages 12a, 12a... Are formed in the exhaust gas suction channel 10a in the inner region, and the external air suction opening 13 is formed in the external air suction channel 10b in the outer region. Since the outside air sucked into 10 b flows along the inner surface of the outer box 3, the exhaust gas sucked into the exhaust gas suction flow path 10 a does not contact the inner surface of the outer box 3 and suppresses the temperature rise of the outer box 3. For example, it can prevent adhesion of oils and fats to the inner surface of the outer box 3 The direct fire that is sucked in after the phenomenon occurs disappears before it comes into contact with the oil and fat adhering to the exhaust path, and it is possible to prevent the occurrence of a duct fire, due to the operation of a safety device such as a fire damper during operation Emergency stops can be avoided as much as possible.
In particular, in the case of the smokeless roaster 1 shown in FIG. 1, since a wide stirring space can be secured on the upstream side of the oil collection box 29, the exhaust gas can be efficiently agitated with the outside air so that the exhaust gas can be cooled and diluted. .
Moreover, since the fats and oils contained in the exhaust gas adhere to the inner wall surface of the partition wall 11 in the crown member 9 (mounting ring 14) to be cleaned daily, the fats and oils accumulated in the smokeless roaster 1 Since it can be suppressed to a very small amount, the main cause of the fire can be eliminated and a further fire prevention effect can be provided.
[0016]
Since the outer box 3 is brought into contact with the lower surface of the table 2 or the inner peripheral surface of the opening 4 in the table 2 and the hole formed in the crowned member 9 is used as the outside air suction opening 13, the outside air (room air) is reliably supplied. The air can be sucked into the outside air suction channel 10b.
Further, the outer box 3 is brought into contact with the lower surface of the table 2 or the inner peripheral surface of the opening 4 in the table 2, and the hole formed in the table 2 and opened by the outside air suction channel 10 b is used as the outside air suction opening 13. Alternatively, a gap is formed between the outer box 3 and the table 2, and the gap between the opening edge of the upper opening 5 and the crown member 9 in the outer box 3 is used as the suction opening 13. Since the suction holes 12, 12a... And the suction opening 13 of the outside air suction channel 10b can be disposed at a completely isolated position, the outside air in the low temperature state can be reliably sucked into the suction space 10, so that the high temperature state It is possible to lower the temperature of exhaust gas more efficiently.
Moreover, in the thing of Claim 4, since secondary air required at the time of cooking in the cabinet 34 outside the outer box 3 which formed many supply slits (not shown) is utilized, it is extra. The air supply slits must be formed in the case of the present invention. However, in the second and third aspects, since the indoor air is sucked, it is not necessary to form an air supply slit more than necessary. It is.
[Brief description of the drawings]
FIG. 1 is an enlarged sectional view of a main part of a parallel type smokeless roaster having an exhaust gas cooling structure according to the present invention.
FIG. 2 is an enlarged cross-sectional view of a main part of a series type smokeless roaster having an exhaust gas cooling structure according to the present invention.
FIG. 3 is an enlarged sectional view showing a first embodiment of the exhaust gas cooling structure.
FIG. 4 is an enlarged sectional view showing a second embodiment of the exhaust gas cooling structure.
FIG. 5 is an enlarged sectional view showing a third embodiment of the exhaust gas cooling structure.
[Explanation of symbols]
2 Table 3 Outer box 4 Opening part 5 Upper opening part 7 Inner box 9 Crown member 10 Suction space 10a Exhaust gas suction channel 10b Outside air suction channel 11 Partition wall 12, 12a ... Suction hole 13 Suction opening 24 Outside air supply hole

Claims (4)

An inner box is disposed inside an outer box having an upper opening disposed below the table, and a crown member is placed above the gap between the inner peripheral surface of the opening formed in the table and the upper portion of the inner box. The upper part of the suction space formed between the outer box and the inner box is divided into inner and outer parts by a partition wall provided at the lower part of the crown member, and the exhaust gas suction hole is formed in the exhaust gas suction channel of the inner part. An exhaust air cooling structure for a smokeless roaster, characterized in that an outside air suction opening is formed in the outside air suction flow path of the outside portion. 2. The exhaust gas cooling structure of a smokeless roaster according to claim 1, wherein the outer box is brought into contact with the lower surface of the table or the inner peripheral surface of the opening in the table, and the hole formed in the crowned member is an outside air suction opening. . The outer box is brought into contact with the lower surface of the table or the inner peripheral surface of the opening in the table, the gap between the opening edge of the upper opening in the outer box and the crown member is used as a suction opening, and the opening of the table 2. The exhaust gas cooling structure of a smokeless roaster according to claim 1, wherein an outside air supply hole that opens at the inner peripheral surface is formed in the table. The exhaust gas cooling of the smokeless roaster according to claim 1, wherein a gap is formed between the outer box and the table, and the gap between the opening edge of the upper opening and the crowned member in the outer box is a suction opening. Construction.

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