JPH0830585B2 - Firing device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an oven, a fish grill, or a meat grill.

(Prior Art) A conventional gas burner equipped with a gas burner for roasting smoke produced when cooking in a baking oven is provided in Shokai Sho 60.
-106004, and a part of a heating gas burner that is processed to have a smoke roasting function is known from JP-B-47-8680.

(Problems to be solved by the invention) However, in the case where the dedicated gas burner for smoke roasting is provided, a cock or the like for supplying gas to each of the heating gas burner and the smoke roasting gas burner is required. In addition, there is a problem that the structure of the heating gas burner itself becomes complicated in a case where a part of the heating gas burner is processed to have a smoke roasting function.

Further, in the case where the gas burner for smoke roasting facing the smoke discharge passage is provided at or near the exit of the smoke discharge passage away from the firing chamber, oil contained in the smoke generated in the firing chamber, etc. Not only is it attached to the smoke exhaust passage and is not susceptible to dirt, but there is also a problem that the exhaust temperature at the outlet of the smoke exhaust passage becomes high.

To solve this problem, a smoke burner gas burner may be provided on the side of the smoke discharge passage on the side of the firing chamber, and the smoke discharge passage may be a rear exhaust type that extends backward.

However, in this case, there is a problem that the entire calciner becomes long in the front-rear direction.

It is an object of the present invention to obtain a calciner that solves these problems.

(Means for Solving the Problems) In order to achieve such an object, the present invention provides
A firing cabinet having a door that can be opened and closed at the front opening is provided, a heating gas burner is provided in the upper portion of the firing cabinet, and a smoke discharge passage is provided that extends substantially horizontally from the rear upper portion of the firing cabinet. Of the smoke exhaust including the protruding discharge passage portion so that the rear end of the heating gas burner reaches at least the rear end position of the protruding discharge passage portion. The heating gas burner portion which faces the upper portion in the passage and faces the smoke discharge passage serves as a smoke roasting portion.

(Operation) In the combustor having the above configuration, the smoke roasting of the heating gas burner facing the smoke discharge passage when the temperature of the smoke generated in the firing chamber immediately after flowing into the projecting discharge passage is high. Is heated by the heat from the heating section, and the rear end of the heating gas burner reaches the upper portion of the smoke discharge passage including the protruding discharge passage section so as to reach at least the rear end position of the protruding discharge passage section. By doing so, it is possible to burn the oil contained in the smoke over a relatively long distance over the entire length of the protruding discharge passage portion. After that, the exhaust temperature is lower than that of the conventional one because it is exhausted through the smoke exhaust passage extending to the rear.

Moreover, since the protruding discharge passage portion at the front end of the smoke discharge passage protrudes to the upper rear portion of the baking chamber, even if the smoke discharge passage portion is taken long, the entire calciner does not become long.

(Example) A case where one example of the present invention is applied to a stove with a calciner will be described.

In the drawings, 1 is a main body of a firing device, 2 is a firing chamber provided therein, 3
Indicates a smoke discharge passage extending substantially horizontally from the upper rear portion of the baking chamber 2, and smoke generated in the baking chamber 2 is discharged from the smoke discharging passage 3. Reference numeral 8 denotes a heating gas burner provided on the upper portion of the baking chamber 2, and 5 denotes a front end portion of the smoke discharging passage 3, which is a protruding discharging passage portion projected into the baking chamber 2.

Then, so that the rear end of the heating gas burner 8 reaches at least the rear end position of the projecting discharge passage portion 5,
The gas burner 8 for heating which faces the upper part of the smoke discharge passage 3 including the protruding discharge passage portion 5 and faces the smoke discharge passages 3, 5.
Then, the smoke roasting section 4 for burning out the smoke generated in the baking chamber 2 was used.

This will be described in more detail with reference to the embodiment shown in FIG. 1 to FIG. 6. The baking chamber 2 has an opening / closing door 7 for closing the opening 6 provided on the front surface thereof, and the upper part of the baking chamber 2 for heating. A gas burner 8 is provided, and the heating gas burner 8 is provided with a ceramic plate 11 having a large number of flame holes 10 on the lower surface of a burner body 9 having a depth reaching from the front side of the firing chamber 2 to the middle of the smoke discharge passage 3. Surface combustion type gas burner b. In this case, two ceramic plates 11 are provided on the front and rear sides, and the rear half of the ceramic plate 11 on the rear side faces the smoke discharge passage 3 including the projecting discharge passage portion 5 to form the smoke roasting portion 4.

Reference numeral 12 denotes a top frame facing the upper part of the calciner 1, and the top frame 12
As shown in FIG. 4, the front half 12a and the rear half 12b are welded together and then subjected to enamel treatment, and the front half 12a is a square frame having an opening 12a-1 facing the ceramic plate 11, The rear half 12b includes a bottom 12b-1 and an L-shaped cylinder 12b-2.
And a catalyst filter mounting portion 3b at the outlet 3a of the cylindrical portion 12b-2, and an ignition hole 14 described later is formed in the bottom surface portion 12b-1. Both are the lower flat part 12a of the first half part 12a.
-3 both sides of the bottom part 12b-1 of the latter half 12b overlap with the back surface of -3, and the rear end face 12a-4 of the first half 12a is brought into contact with the front end face 12c of the cylindrical part 12b-2 of the latter half 12b for welding connection. Let the first half 12a
When the gas burner 8 for heating is attached so as to face the opening 12a-1 of the, the height between the lower surface of the smoke roasting section 4 and the bottom surface section 12b-1 is increased.
A narrow smoke roasting space of about 1.5 cm is formed.

The rail 2c is placed on the box 2c that constitutes the lower half of the baking cabinet 2.
When it is put on -1, it is formed above the rear wall 2e of the box 2c, and the projecting discharge passage portion 5 projecting forward therefrom is formed.

In the drawing, 13 shows an ignition burner for igniting the smoke roasting section 4 of the heating gas burner 8. The ignition flame of the ignition burner 13 has outer walls 2a, 2b and a bottom section 12b- 1
The smoke roasting section 4 is ignited through the through hole 14 provided in the above, and the entire heating gas burner 8 is transferred and ignited.

In this case, the lower surface of the smoke roasting unit 4 is narrow, and therefore the fuel gas emitted from the smoke roasting unit 4 is less likely to diffuse when ignited, and it is particularly difficult to ignite the fuel gas. Even in a gas burner, there is an advantage that it is easy to ignite. Moreover, since the pressure in the discharge passage 3 is lower than that in the firing chamber 2, hot air does not flow out through the through hole 14.

In the above-mentioned embodiment, the smoke roasting section 4 is formed continuously with the same ceramic plate 11 provided on the lower surface of the common burner body 9 with the heating gas burner 8. However, in the same burner body 9 Therefore, the ceramic plate 11 may be divided into a heating part and a smoke roasting part 4 so as to be continuously formed. In this case, the influence of thermal strain of the ceramic plate 11 is reduced and the ceramic plate 11 is cracked. Less likely to cause defects. Further, a slight flameless hole is provided between the common ceramic plate 11 provided in the common burner body 9 and the smoke roasting section 4, leaving a flame hole for transfer of flame. Although separated from the smoke roasting section 4, the ceramic plates 11 may be formed so as to be connected to each other, and the heating and smoke roasting sections 4 may be separately formed in the same burner body. And both ceramic plates 1
A slight flameless hole may be provided between 1 and 11 leaving the flame transfer flame opening.

Further, the gas burner 8 for heating is not limited to the one provided with the ceramic plate 10, but a pipe burner as shown in FIGS. 7 and 8 can also be used.

In the embodiment shown in FIGS. 1 to 6, the surface of the protruding discharge passage portion 5 facing the smoke roasting portion 4 is likely to reach a particularly high temperature.
For this reason, it is desirable to form a concave portion on the surface and take a heat resistant measure such as embedding a refractory material in the concave portion.

In FIGS. 1 to 6, 15 is the catalyst mounting portion 3b.
An oxidation catalyst filter attached to the exhaust gas is shown in the figure. The oxidation catalyst filter is used to purify the exhaust gas by chemically changing Co in the exhaust gas to CO ₂ .

The attachment of this oxidation catalyst filter 15 to the attachment portion 3b is
As shown in FIG. 6, it is done through the mounting case 16. This mounting case 16 has openings 16a, 16a at the top and bottom as shown in FIG.
A groove provided in the mounting portion 3b with a protrusion 16b projecting downward on one lower side in the longitudinal direction of the mounting case 16 and a laterally projecting protrusion 16c projecting on the lower side on the other side. Holes 3b-1, 3b-
After being inserted into 1 and attached to the attaching portion 3b, the projecting piece 16b is bent and fixed. In addition, cut-and-raised pieces 16d, 16d, which project inward, are provided on the side walls of the mounting case 16, respectively.
It was sandwiched between 6d, and the oxidation catalyst filter 15 was supported in the mounting case 16 without rattling.

In the above embodiment, both sides of the projecting discharge passage portion 5 are closed, but it is not always necessary to close them.

Further, as described above, the smoke roasting section 4 is made effective by allowing the smoke roasting section 4 to face the narrow portion of the projecting discharge passage section 5. However, there is such a narrow path section and the oxidation catalyst filter 15 is provided. As a result, the passage resistance of the smoke discharge passage 3 increases. Therefore, if there is a gap in the firing chamber 2, hot air will easily leak out. For this reason, in this embodiment, the top frame 12 is provided on the rear surface of the edge frame 2d forming the front opening 6 provided on the front surface of the container 2c forming the baking cabinet 2.
The flange portion 12a-2 formed on the front end of the edge frame 2a is brought into contact with the flange portion 12a-2 to prevent hot air from entering the upper surface of the top frame 12 as much as possible, and the upper half portion of the edge frame 2d faces the front surface thereof. To prevent the hot air from flowing out from the gap between the door 7 and the operation knobs A and the like facing both sides of the door 7 by inclining it along the back surface of the door 7 so as to be in close contact with both sides thereof. I chose

Reference numeral 17 denotes a clip piece that clips the door 7 to the closed position to ensure this close contact.

Further, the lower portion of the door 7 is provided with a gap 7a as an air intake port. Further, due to the above-mentioned reason, the temperature of the baking cabinet 2 is also likely to increase the temperature of the top plate 19. For this reason, an opening 18 is provided on the upper surface of the baking cabinet 2 so as to be located in front of the exit of the smoke discharge passage 3 of the desired ceiling plate 19, and the opening 18 is provided with the baking board 2 and the ceiling plate 19 facing the upper surface thereof. The gaps 20 between them are communicated with each other so that the hot air on the upper surface of the baking cabinet 2 escapes through the openings 18.

Reference numeral 21 denotes the opening 18 and a cover provided on the upper surface of the outlet of the smoke discharge passage 3, and the cover 21 is provided with openings 22 and 23 at a position facing the upper surface of the outlet of the smoke discharge passage 3 and a rear surface thereof, respectively. The opening 22 is provided with a hood 24 covering the upper surface thereof, and the cover 21 and the hood 24 are assembled into one body, and the cover 21 has leg pieces 25 projecting downward from both sides thereof,
At 25, it is adapted to be inserted and supported in the insertion hole 26 provided in the firing device main body 1.

At this time, the hot air flowing out from the opening 18 passes through the outside of the smoke exhaust passage 3 as shown by the arrow and is exhausted from the rear opening 23.

Further, the temperature of the portion of the smoke discharge passage 3 exposed to the outside of the calciner body 1 is also likely to increase due to the above-mentioned reason. According to this, the rubber gas for supplying the fuel gas to the heating gas burner 8 is provided. Touching the tube 27 can damage it. For this reason, the heat shield plate 28 is provided at this portion.

In FIG. 2, reference numeral 29 designates a fan whose exhaust port communicates with the exhaust passage 3 downstream of the smoke roasting gas burner in the smoke exhaust passage 3, and the operating circuit 3 of the motor 29a for driving the fan 29.
A switch 31 for closing the door 7 when the door 7 is opened is interposed at 0, and the fan 29 is operated in conjunction with the opening operation of the door 7.

At this time, if the portion where the smoke roasting section 4 is provided is narrowed so that the roasting of smoke can be performed better, or if a catalyst filter is provided in the smoke exhaust passage 3, the smoke exhaust passage 3 When the door 7 is opened, the smoke is likely to be discharged from the opening 6 and this can be eliminated.

Although not shown, the oxidation catalyst filter 15 is a smoke roasting unit 4.
May be provided so as to face the lower surface of the smoke roasting section 4, which is advantageous because it can be activated by the heat of the smoke roasting section 4, and the lower surface of the projecting passage 5 can be protected from heat.

1 to 6 show an embodiment in which a smoke roasting unit 4 is provided in addition to the gas burner 8 for heating,
As shown in the figure, a part of the gas burner 8 for cooking may be exposed in the projecting discharge passage 5, and the gas burner facing the projecting discharge passage 5 may be a smoke roasting section.

 In the drawing, reference numeral 33 indicates a thermocouple for flame detection.

Incidentally, as shown in FIG. 9, the rear end of the heating gas burner 8 may substantially coincide with the rear end position of the projecting discharge passage portion 5.

(Effects of the Invention) Since the present invention is configured as described above, it has the effects described below.

Even if the smoke exhaust passage is extended by providing a protruding exhaust passage in the firing chamber, the length of the calciner body in the front-rear direction does not increase, and the smoke exhaust passage is narrower than that in the firing chamber. By making the rear end of the heating gas burner easily reach a high temperature and reaching the upper end of the smoke discharge passage including the protruding discharge passage portion so as to reach at least the rear end position of the protruding discharge passage portion, It is possible to heat and roast high-temperature smoke generated in the firing chamber over a relatively long distance over the entire length of the protruding discharge passage portion. Therefore, the calorific value of the gas burner can be suppressed to a relatively small value, and the smoke can enter the discharge passage and be roasted at the same time, and then the smoke is discharged to the outside through the smoke discharge passage. In comparison with the one in which a gas burner for roasting smoke is provided, the exhaust temperature can be kept relatively low, and the one that can be used safely can be obtained.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention, and FIG.
II-II line enlarged view, Fig. 3 is its III-III line view, Fig. 4
FIG. 5 is an exploded perspective view of the main part, FIG. 5 is a perspective view showing a state where the rear cover is separated, FIG. 6 is an exploded perspective view of the oxidation catalyst filter and the mounting case, and FIG. 7 is another embodiment. FIG. 8 is a cutaway side view of a main part, FIG. 8 is a perspective view of the gas burner of the embodiment shown in FIG. 7, and FIG. 9 is a cutaway side view of yet another embodiment. 2 ... Baking chamber 3 ... Smoke exhaust passage 8 ... Gas burner 5 ... Projection exhaust passage

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tetsuo Tatematsu 2-26, Fukuzumi-cho, Nakagawa-ku, Nagoya-shi, Aichi Rinnai Co., Ltd. (56) References Japanese Patent Publication No. 47-8680 (JP, B1)

Claims (1)

[Claims] 1. A calcination unit main body is provided with a calcination cabinet having a front opening provided with a door that can be opened and closed, and a heating gas burner is provided in an upper part of the calcination cabinet, which is led out substantially horizontally from a rear upper part of the calcination cabinet. A smoke discharge passage is provided, and a front end of the smoke discharge passage is a projecting discharge passage portion projecting into the firing chamber, and a rear end of the heating gas burner reaches at least a rear end position of the projecting discharge passage portion. And a heating gas burner portion facing the upper part of the smoke exhaust passage including the protruding exhaust passage portion, the heating gas burner portion serving as a smoke roasting portion.