JPS60164122A - Gas oven equipped with steam generator - Google Patents

Abstract

PURPOSE:To obtain beautiful finish in baked French rolls of reads, by constituting an oven in such a manner that an upper flame burner is disposed under a steam generating chamber which is provided in the uppermost part of an oven, a baking plate under the upper flame burner, and a lower flame burner under the baking plate, respectively, in the titled gas oven for baking French rolls of bread. CONSTITUTION:Doughs B of French rolls, placed on a baking plate 9 in an oven, are steamed so as to be wrapped up in steam, by the steam generated from a steam chamber 7, by being heated by an upper flame burner 8. The heat from the upper flame burner 8 bakes the upper surfaces of doughs B. While the heat of a lower flame burner 10 flows onto the baking plate 9, passing through small holes 12, blast channels 14, and small holes 13, to bake the doughs B, as well as to indirectly bake the undersides of doughs B interposed by the baking plate 9. With such an arrangement, French rolls can be baked up in desired hardness, with luster being given to the surfaces of them.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a gas oven with a steam generator, which must include a steam generation source for spraying steam onto the dough.

However, conventional gas ovens used a boiler as a steam generating device and were installed separately from the gas oven. Such a gas oven requires a large boiler, which requires equipment costs and installation space larger than a gas oven, and also consumes a large amount of fuel such as heavy oil and gas, resulting in high running costs. Because the temperature of the steam drops in the pipe leading to the oven, the surface of the French bread was not glossy and could not be baked to the desired hardness.

The present invention has been made in view of the above-mentioned problems, and its gist is that a steam generation chamber is provided at the top of the gas oven chamber, a top burner is provided below the steam generation chamber, and a top burner is provided under the steam generation chamber. A heating plate is installed at a lower position considering the required distance from the burner' [L
It is a gas oven with a steam generator, which has a bottom burner installed under the heating plate. 1. A steam generation chamber is provided inside the gas oven chamber, and the steam generation chamber is heated with the combustion heat of the top burner to generate steam. let me,
The steam is sprayed onto the dough to be baked on a hot plate to bake French bread with excellent gloss and a certain hardness, and is supplied into the steam generation chamber by the combustion heat of the upper burner. Because it is formed so that water can be converted into steam, there is no need to install a boiler, etc. Furthermore, it can be formed with the same size as a conventional gas opener, so the installation area remains the same, and dry steam can be generated sufficiently. It has equivalent features that allow it to come into contact with bread dough.

Hereinafter, the present invention will be explained based on examples.

Figure 1 shows a gas opener with a steam generator (Al).
+11 is the open main body, (2) is the opening/closing door, (3) #:
(41, (51 & 1) are the temperature control knobs for the upper and lower burners, respectively.

FIG. 2 is an enlarged cross-sectional view taken along the line I-I in FIG. A burner (8) is provided, a hot plate (9) is mounted below the upper burner (8) at a required distance, and a lower burner a (I) is installed directly below the hot plate (9). Bread dough (Bl) is placed on the hot plate (9) and baked.In addition, the inner wall aD of the oven chamber (6)
As shown in the figure, on the inner wall where the hot plate (9) and the hot plate (9) come into contact, there are upper and lower KA parts as shown in the figure.
- A passage groove I is formed by partitioning the outside of the inner wall aD so that these small holes (b) and small holes t13 communicate with each other.

My father, in the back wall α8 of the oven chamber (6), we drilled a number of small exhaust holes liB... in places located slightly above the heating plate (9), and connected these exhaust holes ae to the back of the back wall bleaching. It communicates with the exhaust groove fin provided in the gas opening and further communicates with the open exhaust port (3) so that the combustion exhaust gas in the gas open is discharged from this exhaust hole α0.

Next, the steam generation chamber (7), which is the main part of the present invention, uses the ceiling wall fil of the oven chamber (6) as a top plate, and the open interior is shaped like a box using the top plate A and the lower board 4. A water conduit (a) is arranged in the generation chamber (7) of the partition, and a partition plate body (inner) with through holes (21a) bored at the bottom on the left and right sides of this water conduit (2) is installed in the fourth Install it as shown in the figure, and then add this partition plate (
211, (21) respectively have baffle plates on the outside), (b)
As shown in the figure, the pipe in the middle of the water conduit (■) is equipped with a combustion control system that bypasses the back side of the wall of the open room and allows preheating with the heat in the oven. and open one end of the gas supply pipe from the gas cylinder (29) to a part of the mixer (27).
A combustion pipe (31) of the required length is connected to the end of the mixer shaft (mixer shaft), and the air supplied from the blower (26) and the combustion gas supplied from the gas supply pipe) are sufficiently connected to the mixer shaft). After mixing, send it to the combustion tube (3 liters) for combustion.The ignition mechanism is the ignition device attached to the base of the combustion tube (3 liters).
ignites the combustion gas (propane gas, city gas, etc.) ejected from the small hole ((b)... made in the base of the combustion tube (31) by emitting an electric spark, which opens the tube in the axial direction. The small holes (b)... are ignited one after another.In addition, with conventional burners, ignition was not completed completely, and there were many cases where raw gas leaked from the gas burner, so in the present invention, the above-mentioned When igniting, set the number of rotations of the blower (to
By lowering the i/second speed and feeding a mixed gas with a small amount of air, ignition is made smoother and at the same time, ignition is ensured.

In other words, it is possible to optimize the ignition conditions by reducing the amount of air by 10 to (9)% compared to complete combustion and lowering the blowing pressure to lower the pressure of the mixed gas sent out from the combustion tube. Confirmed by experiment.

The QC gas open with steam generator of the present invention is configured as described above, and after the open upper and lower fire burners (8) and OIN are ignited as described above, they are placed on the hot plate (9). Put 7 lance bread dough IBI on it and push it into the oven and bake it at a temperature of about 220℃. Steam generation chamber (7) Pour water into the water conduit pipe (small pore body)
...Spray more firewood's worth of urine onto the tilted board. Then, since the substrate α9 is heated to 220°C or more by the upper burner (8), the water 1-1t11 injected from the water guide
) is injected into the oven from the steam injection port (F) through the through hole (21m), passes between the baffle plates (B), and acts to wrap the bread dough (Bl) placed on the hot plate (9). It is baked into hard French bread with a glossy surface.

The combustion heat of the upper burner (8) heats the upper surface of the bread dough (B), and the combustion heat of the lower burner (1e) heats the upper surface of the bread dough (B).
9) is heated to indirectly heat the bottom surface of the bread dough (Bl), and the combustion residual heat leaves the small hole (B) and passes through the communication groove I, and is then transferred to the upper part of the hot plate (9) from the small hole α line in the upper part. After flowing out to heat the bread dough (B), the cooled combustion exhaust gas is discharged from the oven through the exhaust hole αe and the exhaust port (3).

As described above, according to the present invention, a steam generation chamber (71) is provided in the gas oven, and superheated steam is injected onto the object to be baked in the oven when necessary, thereby baking the object to a desired quality. At the same time, equipment costs can be reduced as a boiler is not required9, and running costs are extremely low as fuel such as heavy oil or gas is not required.

Father, when baking objects that do not require steam, the steam generation chamber (7) heated by the upper burner (8) becomes a large heat source, and even if the upper burner (8) is Since the interior of the steam generator can be maintained at a constant temperature for a long time using the heat released from the steam generation chamber (g), the amount of gas used for incineration can also be reduced. Furthermore, since we have installed a forced combustion type gas burner with excellent ignition, there is no need to supply cold secondary air into the oven for main combustion, and the temperature inside the oven can be raised to 220 degrees Celsius using hot fuel. It has many excellent effects, such as being able to maintain the above-mentioned high temperature and also producing a good baking finish for the dough.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the gas oven of the present invention, Fig. 2 is a cross-sectional view from I to I in Fig. 1, Fig. 3 is a cross-sectional view from ■ to ■ in Fig. 1, and Fig. 4 is a steam oven. FIG. 5 is an enlarged perspective sectional view of the generation chamber, and FIG. 5 is a schematic diagram of a forced combustion gas burner. FIG. 6 is an enlarged view showing the main parts of FIG. (1): Oven main body (7); Steam generation chamber (8): Upper burner (91: Heat board commander: Lower burner procedure amendment (*I6) February 17, 1980 February 4, 1982 Patent application 2 filed on the 2nd, Name of the invention Gas oven with steam generator 3, Relationship with the case of the person making the amendment Patent applicant address 6, 2014, Kokubun-cho, Kurume-shi, Fukuoka Name Toshio Ishii 4, Agent Address: 830-0942- 32-Ei711 Specification Detailed Description of the Invention and Brief Explanation of the Drawings
amr&Iv15/Th6, contents of amendment (1) "・Φ to be fired" in the 17th line of the 3rd page of the specification
Insert the following explanatory text between and "Naoban Φ". [The upper burner 8 uses a hollow tube with a closed end, and the upper surface of the upper burner 8 is provided with a required number of small holes 34 in two parallel rows along the longitudinal direction diagonally upward. are set up in a row. In addition, a flame transfer plate 81 is installed between the upper burner 8 and the upper burner 8.
The upper fire burner 8 is installed at the bottom of the upper fire burner 8.
A heat diffusion plate 82 is disposed to diffuse the heat into the oven body l. A required number of small holes 8 are provided in the center of the heat diffusion plate 82 to uniformly apply the heat of the upper burner 8 to the object to be fired on the hot plate 9.
3 is drilled. Note that the lower burner 10 has the same structure as the upper burner 8. In the figure, 56 is a fire transfer plate disposed above the lower burner 10, and 70 is a heat diffusion plate that diffuses the heat of the lower burner 10 into the gas oven main body 1. (2) Insert the following explanatory text between lines 7 and 8 of page 4 of the specification. 7 is a sectional view showing another embodiment of the oven body 1. In this embodiment, the steam generation chamber 7 is created separately from the oven body 1, and the steam generation chamber 7 is located between the back wall 15 and the back wall 15. Cavity part 151
It is mounted on the ceiling of the oven chamber 6. Then, in the upper part of the back wall 15 near the ceiling, there is an exhaust hole 15.
2 is drilled in the required number. Further, the exhaust groove 17 extends upward so as to communicate with the exhaust hole 152, and further communicates with the exhaust port 3 formed on the back side of the oven body 1. The oven having the structure shown in this embodiment has better ignition during cold mornings in winter than the oven having the structure shown in FIG. The reason for this is not clear, but after ignition and combustion, water vapor is generated in the oven chamber 6, but in the case of the oven with the structure shown in Fig. As dew condenses in the cooling oven, a safety device (not shown) installed in the ignition device W32 of the upper burner 8, which will be described later, operates to prevent gas from being supplied to the upper burner 8. This seems to be because it stops. Therefore, it is thought that the combustion of the upper burner 8 can be improved by improving the exhaust air from the ceiling of the oven chamber 6 and preventing the accumulation of water vapor. In addition, in order to keep the thermal energy as much as possible within the oven chamber 6, it is preferable that the number of the above-mentioned exhaust holes 152 is as small as possible to improve combustion. (3) Insert the following explanatory text between the fourth and fifth lines of page 5 of the specification. 8 is a partially cutaway perspective view showing another embodiment of the steam generation chamber 7, and FIG. 9 is a sectional view taken along the line A-A in FIG. 8. In this embodiment, two water pipes 20 are used. They are disposed between partition plates 21 and baffle plates 220, which are formed on both sides of the steam generation chamber 7.In addition, the water pipes 20 are provided with pipes for spouting water toward the center of the steam generation chamber 7. Number small hole 25...
. are bored along the tube axis, so that the water jetting direction is opposite to the steam jetting hole 24. Therefore, even if the water injected onto the heated base 19 becomes a hot water ball and scatters, it will not fly out from the steam nozzle 24 because it is far away from the steam nozzle 24. In this embodiment, the baffle plate 22σ is formed in the shape of a square gutter,
The side wall 221 on the center side of the steam generation chamber 7 is lowered, and the opposite side serves as a partition wall of the steam generation chamber 7, and the baffle plate 220
A required number of slits 222 are bored at predetermined intervals in the lower corner of the partition wall to form a water vapor flow path. If a hot water bubble passage prevention member 229 is arranged in the gutter groove of this baffle plate 220, such as by wrapping a fine wire mesh several times, so that steam can pass through but hot water balls cannot pass through, it is possible to prevent hot water balls from passing through. It is possible to further sufficiently prevent the steam from jumping out of the steam jet holes 24. Note that a reinforcing rib 191 is formed on the upper surface of the base 19 which is the upper part of the upper burner 8, and the base fi is heated by the heat of the upper burner 8.
19 is prevented from deforming. "A mixed gas that does not require secondary air is produced, and this mixed gas is sent at low pressure to the combustion pipes 31 of the upper burner 8 and lower burner 10, which are arranged at both the upper and lower parts of the oven, for combustion. (5) In the 8th line of page 7 of the specification, insert the following explanatory text between ``...after heating'' and ``chilled・φ・''. "The flue gas that has become high temperature due to this combustion stays in the upper part of the gas oven and becomes atmospheric heat, and descends to the top of the hot plate 9 by natural convection and bakes the bread dough B on the hot plate 9. After baking the bread dough B, which is the object to be baked, placed on plate 9, it became no longer useful for baking.'' (6) From page 7, line 10 of the specification to page 8, line 8, Correct as shown below. Since the present invention has the above-mentioned configuration, it produces the following effects. (a) The air heated by the gas burners in the upper part of the gas oven and the bottom part of the gas oven becomes atmospheric heat of natural convection rather than hot air, and the object to be baked is heated by natural convection. Since the surface of the object to be baked does not become hard, the gas oven can also be used for confectionery such as sponge cakes. The holes are provided in the side wall slightly above the heating plate, so the high temperature air inside the oven, which is the effective thermal energy obtained by high-temperature combustion, can be kept in the oven for a long time, and the effective thermal energy is (C) is used inside the burner or in a separate mixing chamber, where the combustion gas sent from the blower is mixed with the combustion gas sent from the blower. This method produces a mixed gas that eliminates the need for secondary air by mixing the air for use in the oven, and sends this mixed gas to the small holes of the burner, eliminating the need to introduce cold secondary air into the oven and making the oven structure nearly airtight. Because it can be made into a structure, it has good heat retention efficiency, can maintain the temperature inside the oven at a constant high temperature, and has good fuel efficiency. (d) i. This prevents the gas flame from extinguishing due to the increase in internal pressure in the oven when the door is closed. (e) The gas flame is installed on the ceiling inside the oven and is a direct flame type, so there is sufficient heat in the center of the oven. Therefore, by increasing the number of gas burners, it is possible to manufacture gas ovens of any size, which was previously considered difficult. (f) Using a blower (g) A steam generation chamber is installed in the gas oven to generate heated steam inside the oven when necessary. Since it can be sprayed onto the object to be fired, the object to be fired can be fired to the desired quality. (h) Since no separate equipment such as a boiler is required, equipment costs can be reduced, and the cost of fuel for boilers, etc. can be reduced. Since it is not necessary, the running cost is reduced. (i) When firing objects that do not require steam, the steam generation chamber heated by the top burner becomes a large heat source, and even if the top burner is not used. The inside of the oven can be kept at a constant temperature for a long time using the heat released from the steam generation chamber. (7) Page 8, line 14 of the specification, ``...enlarged view'' and ``
It is. 7 is a sectional view showing another embodiment of the oven body, FIG. 8 is a partially cutaway perspective view showing another embodiment of the steam generation chamber, and FIG. 9 is a sectional view showing another embodiment of the steam generation chamber. A-A sectional view of
Insert.

Claims (1)

[Claims] A steam generation chamber is installed at the top of the gas oven chamber. A top burner is installed below the steam generation chamber, a hot plate is installed below the top burner, and a bottom burner is installed below the hot plate. Gas open with steam generator.