JPH0735565Y2 - oven - Google Patents

Description

TECHNICAL FIELD The present invention relates to an oven, and more particularly to an oven suitable for baking Western and Japanese sweets.

2. Description of the Related Art For example, in Western and Japanese sweets factories, ovens are used to bake Western and Japanese sweets dough. This type of oven has a sealed baking chamber into which a dough to be baked is inserted, and an electric heater provided on the upper and lower surfaces of the baking chamber to heat the dough. In the conventional oven, the degree of baking of the baked product is determined by arbitrarily adjusting the heating temperature and the heating time of the baking chamber. Further, the burning color, gloss and softness of the surface of the fired product are determined by the amount of water contained in the dough, and the amount of water was adjusted in the process of making the dough.

The problem to be solved by the invention is that, in the conventional oven, the dough is baked in a dry state only by heating from the electric heater, so it takes a long baking time, and moreover the amount of water contained in the dough can be kept constant. However, there is a problem that it is difficult to obtain a stable burning color and softness after firing.

Further, in order to solve the above problems, it is conceivable that an operator sprays mist-like water on the surface of the dough to put the baking chamber in a humidified state, but the amount of water sprayed on the dough easily fluctuates and the baking color after baking is increased. However, the softness is not constant, and the work of spraying the mist is troublesome and troublesome.

Further, as disclosed in Japanese Utility Model Laid-Open No. 63-13754, there is an apparatus configured to inject water into the bottom plate of a steam generator heated by a heater in a firing chamber to generate steam.

However, in the configuration of the above publication, the vapor is supplied to the firing chamber through the void for vapor discharge, and the vapor generated by the vapor generator is provided in the upper portion of the firing chamber with the heater and the heater. It is supplied into the firing chamber through a void formed between the surrounding wall portion. Therefore, in the configuration of the above publication, it is not possible to efficiently inject steam onto the surface of the object to be fired inserted in the firing chamber, and it is necessary to wait until the firing chamber is humidified. Since it takes time to complete, there is a problem that the firing time becomes long.

Then, this invention aims at providing the oven which solved the said subject.

Means for Solving the Problems The present invention provides a sealed firing chamber in which a material to be fired is inserted,
An oven comprising: a heater provided on the upper and lower surfaces of the firing chamber for heating the object to be fired; and a steam generation chamber having a heating plate provided above the firing chamber and heated by the heater. A steam generating mechanism that has a plurality of conduits extending in parallel with the heating plate, and injects water into the heating plate from small holes formed in the plurality of conduits to generate steam, A passage for guiding the steam generated in the steam generation chamber to the side of the firing chamber, and a surface of the object to be fired inserted into the firing chamber, which is bored in a wall defining the firing chamber and the passage. And a steam injection port for injecting steam toward the.

Action In order to inject steam toward the surface of the object to be fired inserted into the firing chamber from the steam injection hole formed in the wall that defines the passage and the passage that guides the vapor to the side of the firing chamber, Steam can be stably and efficiently supplied to the object to be fired inserted in the firing chamber.
Therefore, the object to be fired inserted in the firing chamber can be instantly humidified, and the firing time can be shortened. Moreover, since the steam injected from the steam injection port provided on the side of the baking chamber is directly injected toward the surface of the object to be baked, the baking color of the baked goods such as Western sweets and Japanese sweets, and the gloss of the surface are clean. In addition, the fired product can be finished softly.

Embodiment FIG. 1 to FIG. 3 show an embodiment of the oven according to the present invention.

In each figure, an oven 1 is a confectionery oven suitable for baking western and Japanese sweets, for example, and two baking chambers 2A and 2B are provided.
(Indicated by a chain double-dashed line in FIG. 2) are provided in upper and lower two stages. On the front surface 2a of the oven body 2, there are baking chambers 2A and 2B which will be described later.
Doors 3 and 4 for opening and closing are provided with control panels 5 and 6 on the right side of the doors 3 and 4, respectively. Further, on the left side of the doors 3 and 4, operating levers 7 and 8 for discharging heat and steam in the firing chamber to the outside are provided.

Radiating ports 9 and 10 respectively radiate heat to the atmosphere, which are provided on both side surfaces 2b and 2c of the oven main body 2 (however, the left side surface 2b is not shown). Also, on the lower part of the right side surface 2c is an on-off valve for water supply.
11 and an on-off valve 12 for drainage are protruding. A water supply pipe (not shown) from a water pipe is connected to the on-off valve 11 for water supply, and a drain pipe (not shown) is connected to the on-off valve 12 for drainage.

In addition, the upper surface 2d of the oven main body 2 is provided with exhaust ports 13 and 14 for releasing heat and steam in the baking chambers 2A and 2B.
2B communicates with the exhaust ports 13 and 14 by operating the operation levers 7 and 8 described above. The doors 3 and 4 for opening and closing the firing chambers 2A and 2B are rotated as shown in FIG. 3 by pulling the handles 3a and 4a to open the firing chambers 2A and 2B. Therefore, when baking Western or Japanese sweets dough to be baked, open the doors 3 and 4 as described above and insert the dough placed on the tray (not shown) into the baking chambers 2A and 2B. To be done. Since the doors 3 and 4 are provided with windows 3b and 4b in which heat-resistant glass is fitted,
Even if the doors 3 and 4 are closed during the firing process, the firing chambers 2A and 2B are exposed
You can look inside.

Next, the configuration of the firing chambers 2A and 2B will be described with reference to FIGS. 4 to 7. Since the firing chambers 2A and 2B have the same configuration, only one firing chamber 2A will be described here.

As shown in FIGS. 4 and 5, an upper electrothermal heater 15 is provided on the ceiling of the firing chamber 2A. A lower electric heater 16 is provided below the bottom plate 2A ₁ of the firing chamber 2A. Therefore,
The firing chamber 2A is heated by the heaters 15 and 16 from above and below. Further, the firing chamber 2A is surrounded by a heat insulating material 35 shown in FIG. 5, and has a heat retaining structure in which heat during firing does not escape.

Reference numeral 17 denotes a steam generation chamber, which is formed above the upper electric heater 15. A heating plate 18, which is heated by the upper electric heater 15, is horizontally provided below the steam generation chamber 17. Therefore, the upper electric heater 15 is provided between the baking chamber 2A and the heating plate 18 to heat them. Therefore, the heating plate 18
It is not necessary to separately provide a heater for heating the.
The heating plate 18 is made of a relatively thick iron plate and is provided so as to accumulate heat.

A passage 19 communicating with the steam generation chamber 17 is provided on the rear side of the firing chamber 2A.
Is provided. The plurality of steam injection ports 20 ₁ to 20 _n for communicating the passage 19 and the baking chamber 2A as shown in Fig. 4 in the rear wall 2A ₂ baking chamber 2A is bored. Therefore, the steam generated in the steam generation chamber 17 passes through the passage 19 and is supplied into the firing chamber 2A from the steam injection ports 20 _{1 to} 20 _n .

The steam injected from each steam injection port 20 _{1 to} 20 _n into the baking chamber 2A is injected from the rear side toward the surface of the object to be baked inserted into the baking chamber 2A, so that the steam is injected into the object to be baked. Can be supplied stably and efficiently. Therefore, the periphery of the object to be fired inserted in the firing chamber 2A can be instantly put into a humidified state, and the firing time can be shortened. Moreover, since the steam injected from the steam injection ports 20 _{1 to} 20 _n provided on the rear side of the firing chamber 2A is directly injected toward the surface of the object to be fired,
The burned color of baked products such as Western and Japanese sweets, the gloss of the surface are beautiful, and the baked products can be finished softly.

Further, since the steam injected from each of the steam injection ports 20 _{1 to} 20 _n is not directly sprayed to the heater 15, it is possible to prevent the temperature of the heater 15 from being lowered and to extend the life of the heater 15. .

Reference numeral 21 denotes a drain pipe, which is provided to discharge water accumulated in the bottom of the passage 19 to the outside and is connected to the drain opening / closing valve 12.

Reference numeral 22 denotes a steam generation mechanism, which includes an injection pipe 23 extending to the steam generation chamber 17, a water supply pipe 24 connected to the injection pipe 23, and a solenoid valve 25 provided in the middle of the water supply pipe 24. The injection pipe 23 is composed of three injection pipes as shown in FIGS. 6 and 7.
23A to 23C are extended on the heating plate 18 at substantially equal intervals. Each of the injection pipes 23A to 23C is fixed to a vertical bracket 27 by a tubular mounting member 26.

A cross joint 28 is connected to a water supply pipe 29 from the solenoid valve 25 and water supply pipes 30A to 30C connected to the injection pipes 23A to 23C. Therefore, the water supply line 24 is provided with the on-off valve 11 for water supply.
Therefore, when the solenoid valve 25 is opened, the water supplied from the water supply pipe 24 is divided into the water supply pipes 30A to 30C that branch in three directions at the cross joint 28, and the water is supplied to each injection pipe.
Supplied to 23A-23C.

As shown in FIG. 8, the injection pipe 23 (23A to 23C) is provided with small-diameter nozzle openings 23a and 23b in a direction inclined at an angle θ (θ = 30 ° in this embodiment) below the horizontal direction. . As shown in FIG. 9, a plurality of nozzle openings 23a and 23b are provided at predetermined intervals in the axial direction of the injection pipe 23 extending on the heating plate 18. Further, since the tip of the injection pipe 23 is closed by the plug 34, when water is supplied from the water supply pipe line 24, the water flowing into the injection pipes 23A to 23C becomes the nozzle openings 23a, 23b (2
3a _{1 to} 23a _n , 23b _{1 to} 23b _n ) are injected toward the heating plate 18. Since each nozzle port 23a, 23b has a small diameter, the nozzle port 23a
The water sprayed from a and 23b is atomized by the water pressure and heating plate 1
Spray evenly over the entire surface of 8. Therefore, heating plate 1
8 is not sprayed with water locally.

Since the heating plate 18 is heated to about 200 ° C. by the upper electric heater 15, the mist-like water sprayed on the heating plate 18 instantly becomes steam. In this way, the steam generation chamber
The steam generated in 17 passes through the passage 19 and the steam injection ports 20 _{1 to} 20 _n due to its pressure and is supplied into the firing chamber 2A.

That is, steam flowing in the passage 19 is directly injected toward the surface of the baked product from the steam injection ports 20 ₁ to 20 _n provided on the rear side of the baking chamber 2A.

Here, the steam generating operation will be described.

As shown in FIG. 4, the control panel 5 is provided with a steam generation switch 31, an injection time adjusting knob 32 and the like. The injection time adjusting knob 32 is connected to the timer 33 and adjusts the operating time of the timer 33. In this embodiment, the timer 33
The operating time is set to an arbitrary time within the range of about 1 to 3 seconds.

When supplying steam into the firing chamber 2A, the operator presses the steam generation switch 31. When the start signal is output from the steam generation switch 31, the timer 33 energizes the solenoid valve 25 for the time set by the injection time adjusting knob 32. Therefore, the solenoid valve 25 is opened for the operating time of the timer 33, during which water is supplied to the injection pipes 23A to 23C. Then, as described above, the water jetted from the jet pipes 23A to 23C is sprayed on the heating plate 18 to become steam, and the steam is supplied into the firing chamber 2A.

Since the timer 33 for controlling the valve opening time of the solenoid valve 25 is provided in this manner, the amount of steam generated can be easily adjusted by operating the injection time adjusting knob 32, and depending on the type of fired product. The humidity in the firing chamber 2A can be adjusted appropriately. Moreover, since the amount of steam generated is constant, there is little variation in the degree of baking of the fired product, and the finish is stable.
Further, since the operation timing of the steam generation switch 31 can be arbitrarily set by the operation article in accordance with the kind of the fired article,
For example, when baking Western and Japanese sweets, it is possible to freely heat and humidify, and depending on the amount of steam generated and the timing of steam supply, the baking color of the baked product, the surface gloss, etc. will be clean, and the baked product will be soft and soft. You can also Furthermore, by supplying steam into the firing chamber 2A, the fired product is fired in a humidified state, and the firing time can be shortened as compared with the dry state.

In the above description, the case of baking Western or Japanese sweets is described as an example, but the present invention is not limited to this, and it goes without saying that a baked product such as bread can be baked.

Effect of the Invention As described above, the oven according to the present invention has the oven inserted into the baking chamber through the steam injection port formed in the wall defining the passage for guiding the steam to the side of the baking chamber and the wall of the baking chamber. Since the steam is jetted toward the surface of the baked product, the steam can be stably and efficiently supplied to the baked product inserted into the baking chamber. Therefore, the object to be fired inserted in the firing chamber can be instantly humidified, and the firing time can be shortened. Moreover, since the steam injected from the steam injection port provided on the side of the firing chamber is directly injected toward the surface of the object to be fired,
The burned color of baked products such as Western and Japanese sweets, the gloss of the surface are beautiful, and the baked products can be finished softly. or,
Since the steam injected from the steam injection port is not directly blown to the heater, it has features such that the temperature of the heater can be prevented from lowering and the life of the heater can be extended.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment of the oven according to the present invention, FIGS. 2 and 3 are front views of the oven, right side views, and FIGS. 4 to 6 show a baking chamber and a steam generating mechanism, respectively. A front view, a side view, a plan view, and FIGS. 7 to 9 for explaining are a sectional view, an enlarged sectional view, and an enlarged side view, respectively, for explaining an injection pipe. 1 ... Oven, 2 ... Oven body, 2A, 2B ... Baking chamber, 3,4 ... Door, 5,6 ... Control panel, 9,10 ...
… Heat dissipation port, 11,12 …… Open / close valve, 13,14 …… Exhaust port, 15 ……
Upper electric heater, 16 ... Lower electric heater, 17 ... Steam generating chamber, 18 ... Heating plate, 19 ... Passage, 20 ... Steam injection port,
21 ... Drain piping, 22 ... Steam generation mechanism, 23, 23A-23C
...... Injection pipe, 24 …… Water supply line, 25 …… Solenoid valve, 29,3
0A-30C …… Water supply pipe, 31 …… Steam generation switch, 32
…… Injection time adjustment knob, 33 …… Timer.

Claims (1)

[Scope of utility model registration request] 1. An oven comprising a hermetically sealed firing chamber into which a material to be fired is inserted, and a heater which is provided on the upper and lower surfaces of the firing chamber and heats the material to be fired. A steam generating chamber provided above and having a heating plate to be heated by the heater, and a plurality of pipe lines extending in parallel with the heating plate, from a small hole formed in the plurality of pipe lines. A steam generating mechanism for injecting water to the heating plate to generate steam, a passage for guiding the steam generated in the steam generating chamber to the side of the firing chamber, and the firing chamber and the passage are defined. An oven comprising: a steam injection port, which is provided in a wall portion and injects steam toward a surface of an object to be fired inserted into the firing chamber.