JPH0791621A - Baking cooker - Google Patents

Abstract

PURPOSE:To provide a baking cooker which is constituted to ensure transfer of flame between burner ports, perform easy and safe cleaning, and effect uniform heating. CONSTITUTION:A burner port surface 6 of a lower burner 5 is formed in a horizontal V-shaped recess and oblique down and oblique up burner port trains are alternately aligned in a zigzagging state on a burner port surface 6. Thus, since an injection direction of mixture gas is divided into an oblique down direction and an oblique up direction, secondary air A is caused to flow from a position above the lower burner 5 and a secondary air inflow port 3 formed by using a secondary air flow straightening guide 4 to straighten the flow of flame is formed in a slit-form state freed from uneven surface. This constitution performs easy and safe cleaning. Further, since flames injected in a divided state cross each other at a flame transfer part, transfer of flame between the burner ports is ensured.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a baking cooker such as an oven or roaster that uses a fuel such as gas or petroleum.

[0002]

2. Description of the Related Art Heretofore, as a baking cooker of this type, one having a structure as shown in Japanese Utility Model Laid-Open No. 57-150323 has been known.

The structure will be described below with reference to FIGS. 5 and 6. The secondary air inflow hole 3 is provided in the burner storage chamber 33 provided below the cooking box 32 forming the cooking chamber 31.
4, 34a are drilled. And the burner storage room 3
3, a tubular gas burner 36 is provided in which flame holes 35 penetrating in the horizontal direction and flame holes 35a penetrating obliquely downward are arranged in a staggered manner. Also, the horizontal flame holes 3
A rising piece 37 and a drooping edge 38 are provided in the secondary air inflow hole 34 facing 5 and a drooping edge 38a is provided in the secondary air inflow hole 34a facing the obliquely downward flame hole 35a.

[0004]

In such a conventional structure, the tubular gas burner 36 is provided with staggered flame holes 35, 35a in the horizontal direction and the obliquely downward direction.
The mixed gas ejected from each flame hole 35, 35a flows out so as to be separated from each other, and there is a problem that the fire transfer becomes uncertain.

In addition, the tubular gas burner has flame holes 35, 35a.
Since it is provided, it is difficult to obtain a large ejection angle difference in the ejection direction of the mixed gas from the flame holes 35 and 35a, and therefore, the flame surface is generally directed downward so that the hot air reaches far away. It was Further, in order to extend the flame elongation, the secondary air inflow holes 34, 34a exposed by the obliquely downward flame holes 35a.
The hanging length of the hanging edge 38a of the above was made long. This makes 2
The secondary air inflow holes 34, 34a become uneven edges in a staggered arrangement of the flame holes 35, 35a, which not only complicates the configuration but also causes an obstacle when the user cleans the inside of the cooking chamber 31. There were also problems in handling and safety such as getting sick and cutting hands.

[0006] The present invention solves the above problems by ensuring the transfer of flames between the flame holes and simplifying the shape of the secondary air inlet to make the cleaning of the cooking chamber easy and safe. An object of the present invention is to provide a baking cooker capable of uniformly applying hot air to the entire surface of the grill.

[0007]

In order to achieve the above object, the present invention includes a cooking chamber, a secondary air inlet provided at a lower portion of the cooking chamber, and a secondary air inlet. And a pair of lower burners whose flame hole surfaces face each other and face the cooking chamber. The flame hole surfaces of the lower burner are formed in a lateral V-shaped concave surface, and the flame holes are alternately arranged in a staggered pattern. It is configured in a row.

Further, the flame hole surface of the lower burner is formed into a lateral V-shaped concave surface, and the flame holes are alternately arranged in a staggered manner in the concave surface so that the width of the lower burner is larger than the height. The upper and lower surfaces are formed flat.

[0009]

In the above structure, the flame hole surface of the lower burner is formed into a lateral V-shaped concave surface, and the flame holes are alternately arranged in a staggered manner in the concave surface, so that the mixed gas is jetted obliquely upward. Since the air is distributed diagonally downward, the secondary air inlet formed by the secondary air rectifying guide that rectifies the flame by injecting the secondary air from above the lower burner can be formed in a slit-like shape without irregularities. Furthermore, since the mixed gas that is distributed and ejected crosses and flows out, it is easy to transfer the fire.

Further, since the width of the lower burner is made larger than the height and the upper and lower surfaces are made flat, the obstruction of the flow path of the secondary air flowing from between the lower burner and the secondary air rectification guide is reduced. However, the secondary air flow is rectified with little turbulence.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

(Embodiment 1) First, a first embodiment will be described with reference to FIGS.

In the figure, reference numeral 1 is a cooking chamber, and an upper burner 2 formed of a ceramic burner is attached to the upper opening. Further, secondary air rectification guides 4 forming a secondary air inlet 3 with the lower burner are integrally formed on both lower side portions in a diagonally downward direction. The tip end edge 4a of the secondary air rectification guide 4 is formed in a substantially straight shape without any unevenness in the longitudinal direction, whereby the secondary air inlet 3 is formed into a slit-like shape without any unevenness.

Reference numeral 5 denotes a pair of lower burners arranged on both lower sides of the cooking chamber 1 and faces the cooking chamber 1 via the secondary air inlet 3 so that the flame surface 6 thereof faces each other. . The flame hole surface 6 of the lower burner 5 is formed as a lateral V-shaped concave surface, as shown in FIG. And the upper surface 6a
A plurality of diagonally downward flame hole rows 7 are installed at required intervals in
On the lower surface 6b, a plurality of obliquely upward flame hole rows 8 are provided at required intervals. As shown in FIG. 2, the flame hole rows 7 and 8 are alternately arranged in a staggered manner on the upper surface 6a and the lower surface 6b, and the flame holes at both ends overlap vertically or adjacently. The fire transfer part 9 is formed.

Reference numeral 10 is a grill inserted into the cooking chamber 1, and 11 is a saucer inserted into the bottom of the cooking chamber 1.
Reference numeral 12 denotes an exterior body that internally houses the cooking chamber 1, and a secondary air intake 1
3 is provided.

In the above structure, when the upper burner 2 and the lower burner 5 are ignited, the food to be cooked placed on the grill 10 is heated from above and below to be baked and cooked.

In this ignition, particularly in the ignition of the lower burner 5, since the flame hole surface 6 is arranged with the oblique downward flame row 7 and the oblique upward flame hole row 8, the flame hole row 7, the flame hole row 6 A flame 14 directed obliquely downward and a flame 15 directed obliquely upward are ejected from 8. The flame 14 and the flame 15 are jetted so as to intersect with each other at the flame transfer portion 9 formed between the flame hole row 7 and the flame hole row 8. As a result, when one of the flame hole rows 7 and 8 is ignited, the flame is sequentially transferred to another flame hole array by the fire transfer portion 9, and the flame hole surface 6 of the lower burner 5 is transferred. An oblique downward flame 14 and an oblique upward flame 15 are alternately ejected on the entire surface of the.

Among the flames thus ejected, the obliquely downward flame 14 is sucked from the secondary air inlet 3 by the exhaust draft and is directed obliquely downward by the secondary air flow guide 4 to the secondary air flow A. Is rectified by, and the hot air is distant from the lower burner 5 as shown by arrow B,
That is, it is sent to the central portion of the cooking chamber 1. Further, the obliquely upward flame 15 is affected by the rectification obliquely downward by the secondary air flow A, but due to the obliquely upward force of the flame, the hot air thereof is generated in the vicinity of the lower burner 5 as shown by an arrow C. That is, it is sent to the peripheral portion of the cooking chamber 1. As a result, a relatively uniform heat distribution is obtained on the surface of the grill 10. The jet angles of the obliquely downward flame 14 and the obliquely upward flame 15 can be appropriately set in order to make the heat distribution on the surface of the grill 10 uniform.

As described above, since the flame rectification may be performed only for the obliquely downward flame 14, the tip edge 4a of the secondary air rectification guide 4 may be formed substantially linearly in the longitudinal direction. The secondary air inflow port 3 can be formed in a slit shape without unevenness.

(Embodiment 2) Next, a second embodiment will be described with reference to FIG.

The same parts as those shown in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.

Reference numeral 21 denotes a pair of lower burners arranged in the lower portion of the cooking chamber 1, the width W of which is formed larger than the height H, and the upper surface 22 and the lower surface 23 are formed flat and the cross section thereof is shown. Is hollow and flat.

The lower burner 5 of the first embodiment shown in FIG. 1 has upper and lower surfaces 16 and 17 formed in a middle height. This is to obtain the cross-sectional area of the lower burner 5 required for optimizing the mixing ratio of fuel and air, and to reduce the width of the outer casing 12, the lower burner 5
The width W ₁ of the above is reduced and the upper and lower surfaces 16 and 17 are set to a middle height to increase the height H ₁ .

Thus, the upper and lower surfaces 16 and 1 of the lower burner 5 are
If 7 is formed to have a middle height, a flow path obstacle will occur in the inflow path of the secondary air A, and there is a problem that the rectification of the flame 14 obliquely downward is impeded.

On the other hand, in the case of this embodiment, the lower burner 21 is adjusted so that the mixing ratio of fuel and air becomes optimum.
The width W is larger than the height H.

With this configuration, there is no flow path obstruction in the inflow path of the secondary air A, and the rectification of the obliquely downward flame 14 can be smoothed. For reference, it is said that the width W of the lower burner 21 is preferably about 2.5 times the height h of the inflow passage of the secondary air A. However, it should be added that this value is not a constraint on the present invention.

By making the lower burner 21 hollow and flat, the width of the outer casing 12 becomes wider, but on the other hand, the height becomes smaller.

[0028]

As is apparent from the above description of the embodiments, according to the present invention, the flame hole surface of the lower burner is formed into a lateral V-shaped concave surface, and the flame holes are alternately arranged in a zigzag pattern. By arranging them in line, the flames are jetted alternately diagonally downward and diagonally upward, and they are jetted so as to intersect at the fire transfer part, so that the flame transfer at the time of ignition is ensured, and the flame downward obliquely flows in. The hot air is rectified by the secondary air and sent to the central part of the cooking chamber, and the hot air of the obliquely upward flame is sent to the peripheral part of the cooking chamber to make the heat distribution on the grill surface almost uniform. . Further, since the secondary air only needs to rectify the obliquely downward flame, the tip end edge of the secondary air rectification guide can be formed in a substantially straight line, and the secondary air inlet can be formed in a slit shape without unevenness. . This makes cleaning the cooking chamber easy and safe.

Further, by making the width of the lower burner larger than the height and flattening the upper and lower surfaces, there are no obstacles in the inflow passage of the secondary air, and the rectification of the oblique downward flame is smoothed, and the hot air cooking chamber Can be promoted to the central part of the.

Further, in the lower burner in which the flame holes are provided in a single row, in order to eject the flame obliquely downward, the lower burner must be inclined, but in the present invention, it is arranged horizontally. Since it can be installed, the apparent height of the lower burner portion is lowered, and the saucer can be deepened accordingly.

As described above, according to the present invention, it is possible to ensure the transfer of flame between the flame holes and to simplify the shape of the secondary air inflow port to facilitate the cleaning of the cooking chamber, and to secure the grill. It is possible to provide a baking cooker capable of uniformly applying hot air to the entire surface of the cooker.

[Brief description of drawings]

FIG. 1 is a side sectional view of a baking cooker according to a first embodiment of the present invention.

FIG. 2 is a front view of a main part cut in two parts.

FIG. 3 is a side sectional view of the lower burner.

FIG. 4 is a side sectional view of a baking cooker according to a second embodiment of the present invention.

FIG. 5 is a side sectional view of a main part of a conventional baking cooker.

FIG. 6 is a partially cut front view of the same main part.

[Explanation of symbols]

 1 Cooking chamber 3 Secondary air inlet 5, 21 Lower burner 6 Flame hole surface 7, 8 Flame hole array 22 Upper surface 23 Lower surface W Lower burner width H Lower burner height

Claims (2)

[Claims] 1. A cooking chamber, a secondary air inlet provided in a lower side portion of the cooking chamber, and a pair of flame hole surfaces facing the cooking chamber through the secondary air inlet. A baking cooker comprising: a lower burner, wherein the flame hole surface of the lower burner is formed into a lateral V-shaped concave surface, and the flame holes are alternately arranged in a staggered manner in the concave surface. 2. A cooking chamber, a secondary air inlet provided in a lower portion of the cooking chamber, and a pair of flame hole surfaces facing the cooking chamber through the secondary air inlet. A lower burner, the flame hole surface of the lower burner is formed in a lateral V-shaped concave surface, and the flame holes are alternately arranged in a staggered manner in the concave surface, and the width of the lower burner is formed larger than the height. A baking cooker characterized in that the upper and lower surfaces are formed flat.