JPH045927A - Gas cooker - Google Patents

Abstract

PURPOSE:To obtain this gas cooker whose cooking performance is satisfactory and whose constitution is simple by providing an upper burner provided on the upper part of a heating chamber, a grill net provided on about a center part, and a lower burner having plural flame holes, etc., and setting a distance between the upper end of the grill net and the center of the lower burner is <=20mm. CONSTITUTION:Food 10 to be cooked, placed on a grill net 11 is heated and cooked from the upper burner 9 and the lower burner 15 in a heating chamber 6. In this case, since the upper burner 9 covers almost the whole surface of the food 10 to be cooked, the upper face of the food 10 to be cooked can be heated and cooked uniformly. On the other hand, the lower burner 15 forms a flame a in a flame hole 14, but it is mixed in an air chamber 16 together with secondary air supplied forcibly from an air blowing device 17 and becomes a high temperature gas flow, and flows along the lower face part in parallel to the food 10 to be cooked and the grill net 11. In order to obtain sufficiently the arrival distance of high temperature gas, and also, to secure the stability of the gas flow, it can be attained by holding a blowout speed from an opening part 13 of high temperature gas in a prescribed level, and setting distance L between the lower burner and the grill net to <= 20mm in its level.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a gas cooker using gaseous fuel such as city gas or liquefied petroleum gas.

2. Description of the Related Art Conventionally, this type of gas cooker, like the gas grill shown in Fig. 3, has an upper burner 2 with a flame opening made of a ceramic perforated plate or wire mesh punched metal attached to the ceiling of a heating chamber 1, and heats the cooking device. A grill 3 is provided approximately in the center of the chamber 1 on which a food to be cooked 4 can be placed, and lower burners 5 for forming a Bunsen flame are provided at the lower left and right sides of the heating chamber 1. There is a screen printing method that uses .

Problems to be Solved by the Invention However, in such gas cookers, it has not always been possible to obtain good cooking results.

For example, in the double-sided grill shown in FIG.
I was cooking at the same time with the lower burner 5.
is a natural combustion, and the ejection speed of the flame and combustion gas is extremely low, making it difficult for the combustion heat from the left and right lower burners 5 to reach the center of the heating chamber 1, and also making it difficult to balance the ejections on the left and right sides. This tendency becomes especially severe as the width of the heating chamber 1 increases, and the degree of grilling on the bottom surface of the food to be cooked 4 becomes extremely uneven between the left and right sides, or between the sides and the center, making it difficult to obtain good cooking results. I couldn't do that. Furthermore, since the lower burner protrudes from the side, the structure of the inner wall surface of the heating chamber 1 is complicated and difficult to clean.

The present invention solves the above problems, and aims to provide a gas cooker with good cooking performance and a simple configuration.

Means for Solving the Problems In order to achieve the above-mentioned problems, the present invention provides a heating chamber having an opening/closing door in front, an upper burner provided above the heating chamber, and a burner provided approximately in the center of the heating chamber. a lower burner having a plurality of flame holes facing into the heating chamber from the rear wall surface of the heating chamber under the grid; a blower device for forcibly sending secondary air for combustion from around the lower burner; A constriction part is provided downstream of the flame forming part of the burner, and the distance between the upper end of the grid and the center of the lower burner is 20 mm or less.

Effect: With the above-described configuration, the present invention envelops the combustion heat from the flame formed in the lower burner with the forced secondary air flow supplied from around the burner, stabilizes the flame, and promotes the mixing of combustion gas and air. As a parallel flow of high-temperature gas, the food can be heated more efficiently from the lower part of the gridiron and evenly heated along the lower surface of the food from the lower burner to the door, resulting in extremely good cooking performance.

EXAMPLE Hereinafter, an example of the gas cooker of the present invention will be described with reference to FIG.

As shown in the figure, the heating chamber 6 has an opening/closing door 7 made of a glass door at the front, an exhaust port 8 at the upper rear part, and an upper burner 9 whose flame forming part is a ceramic perforated plate at the upper part. . Further, at the bottom, there is a saucer 12 provided with a grill 11 on which the food to be cooked 10 is placed. An opening 13 having a diaphragm shape is formed in the rear wall surface of the heating chamber 6 at a height between the grill 11 and the saucer 12, and the heating chamber 6 can be accessed from the outside of the heating chamber 6 through this opening 13. A lower burner 1 consisting of a substantially linear Bunsen burner having a plurality of flame holes 14 toward the
5 is looking out. Further, this lower burner 15 is surrounded by an air chamber 16, and an air blower 17.
It is located in the secondary air flow path that is forcibly supplied from the bottom, and the distance between the center position of the lower burner 15 and the upper end position of the gridiron 11 is 20 mm or less.

With the above configuration, the food 1 placed on the grill 11
0 is an upper burner 9 and a lower burner 1 in the heating chamber 6.
Cooked from 5 onwards. At this time, since the upper burner 9 covers almost the entire surface of the object 10, the upper burner 9 covers almost the entire surface of the object 10.
The top surface can be heated evenly.

Further, the lower burner 15 forms a flame in the flame hole 14,
This is mixed in the air chamber 16 with the secondary air forcibly supplied from the blower 17, and flows as a high-temperature gas flow on the lower surface of the food 10 and the gridiron 11 in parallel to them. At this time, the flame is stabilized in the process of being mixed with secondary air in the air chamber 16, and the mixture is rapidly gasified at a high temperature and its volume increases dramatically.
The blowing speed at the constriction part 3 becomes extremely high, and the distance it reaches is significantly expanded. Therefore, high-temperature gas can flow from the rear of the heating chamber 6 to the opening/closing door 7 with a relatively small amount of air. However, the influence of natural draft from the bottom of the gridiron 11 cannot be ignored,
In order to ensure a sufficient reach of the high temperature gas and stability of the gas flow, the blowing speed of the high temperature gas from the opening 13 must be maintained at a certain level. At this constant blowing speed, the distance between the lower burner and the grid and each position in the front and back direction of the grid 11 are determined as A, B, and C.
Then, the amount of heat Q received at each position is as shown in Figure 2. That is, when the value of L is 20+nm or more,
On the back side C near the lower burner 15, the high-temperature gas flowing in parallel becomes difficult to come into contact with the food to be cooked 10, so that the grilling performance deteriorates locally. In this way, when the distance is within 20 mm, including variations in dimensions, etc., grilling performance improves.

Furthermore, since the flame from the lower burner 15 peeks into the heating chamber 6, the distance is reduced and the amount of radiation to the rear of the food to be cooked 10 increases, improving the grilling performance at the rear of the heating chamber 6. Furthermore, the high-temperature gas flow is conveyed in one direction from the rear to the front of the heating chamber 6, eliminating interference with the burner.
Variations in heat distribution within the heating chamber 6 are extremely reduced, and uneven baking of the food 10 no longer occurs. On the other hand, heating chamber 6
There is almost no difference in heat distribution between before and after because the high-temperature gas is in parallel flow and almost horizontally in contact with the gridiron 11.
Fish, etc. can be grilled evenly.

As a result, it is possible to provide a cooking device with the lowest grating position among double-sided grills, giving a relaxed feel.

Effects of the Invention As described above, the gas cooker of the present invention provides the following effects.

(1) The high-temperature gas flow blown out from the lower burner in a substantially horizontal direction allows the food to be cooked to be cooked evenly and freshly, making it possible to provide a double-sided grilling gas cooker with good grilling performance.

(2) The configuration of the side portion of the heating chamber is simplified, resulting in a cooker that looks good and is easy to clean.

(3) Since differences in temperature distribution in the lateral direction of the heating chamber are less likely to occur and the position of the grill is lowered, it is possible to provide a spacious gas cooker that is wide and has a large volume of heating chamber.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view of a gas cooker according to an embodiment of the present invention, FIG. 2 is a characteristic diagram of the same gas cooker, and FIG. 3 is a front sectional view of a conventional gas cooker. 6... Heating chamber, 9... Upper burner, 1
0...To be cooked, 11...Grilling net, 1
5...Lower burner.

Claims (1)

[Claims] A heating chamber having an opening/closing door in front, an upper burner provided above the heating chamber, a gridiron grate provided approximately in the center of the heating chamber, and A lower burner having a plurality of flame holes facing into the heating chamber, a blower device for forcibly sending secondary air for combustion from around the lower burner, and a throttle portion provided downstream of the flame forming portion of the lower burner. , A gas cooker in which the distance between the upper end of the grid and the center of the lower burner is 20 mm or less.