JPH09303719A - Burner of gas cooking appliance - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable very wide regulation of thermal power, while making carry- over excellent, in a burner of a gas cooking appliance. SOLUTION: This burner is equipped with a burner main body 2 and a burner head 3 and the burner head 3 being circular practically is set on the upper side of an upper mixing chamber 5a and a lower mixing chamber 5b of the burner main body which are shaped like rings practically. These two upper and lower mixing chambers 5a and 5b are supplied with a mixture of fuel gas and air independently by a fuel supply part 10. The burner head 3 has an upper burner port array 3a and a lower burner port array 3b provided in two stages above and below radially in the outer circumference thereof. They are supplied with the mixture from the upper mixing chamber 5a and the lower mixing chamber 5b independently respectively and individual burner ports are made smaller on the lower burner port array 3b side than on the upper burner port array 3a side so that the mixture be burned those ports with a reduced quantity of combustion. Since flames 7a of the upper burner port array 3a at which the quantity of combustion is large are extinguished at the time of regulation of thermal power, the range of regulation of the thermal power is wide.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a burner for a gas cooker.

[0002]

2. Description of the Related Art Conventionally, in a burner of a gas cooker such as a gas table stove, a plurality of flame openings are arranged on the circumference to burn the gas. However, with this burner, when adjusting the heat power, the heat power could only be adjusted within the stable combustion range of the burner. In other words, if the heating power is made too large, CO is likely to be generated, and if the heating power is made too small, the fire is easily extinguished. Therefore, when trying to maintain general cooking performance, the heating power adjustment range could not be set so wide as to design. . Therefore, for example, if it is designed according to the high heat power, a low heat cannot be obtained, and conversely, if it is designed according to the low heat, a high heat cannot be obtained. In particular, it was not possible to squeeze the firepower to a very low level (hereinafter referred to as simmering fire). As a solution to this, as shown in FIG. 4, there is known a parent-child burner 30 in which burners (child burner 35 and parent burner 31) having different thermal powers are provided in the central portion and the outer periphery thereof, respectively. In the parent-child burner 30, since the flame 35a of the child burner 35 in the central portion has a weaker heating power than the flame 31a of the surrounding parent burner 31, if only the child burner 35 is burned,
You can squeeze the firepower considerably.

[0003]

However, in the parent-child burner 30, since the parent and child flames 31a and 35a are separated, the flame transfer between the two flames 31a and 35a is poor. Moreover, the thermocouple 36 of the extinguishing safety device is connected to the flame 31 of the parent and child.
Since there is no place where both a and 35a can be detected, only the flame 35a of the child burner 35 is exposed, so that misfire of the parent burner 31 cannot be detected. If you try to detect the misfire of the parent burner 31 without knowing this, the parent burner 31
The flame 31a of No. 1 also required another thermocouple. Recently, a burner of a type in which a temperature sensor for preventing overheating is provided in the center of the burner is also known.
In No. 1, since the child burner 35 is provided, it is difficult in terms of space to attach a temperature sensor for preventing overheating in the central portion. An object of the present invention is to solve the above problems and to provide a burner for a gas cooker which has a good heat transfer and has a wide range of heat power adjustment.

[0004]

A burner for a gas cooker according to claim 1 of the present invention, which solves the above-mentioned problems, arranges a plurality of flame openings on the circumference to generate a mixture of fuel gas and air. A combustion upper row of flames, a lower row of flames having a plurality of flames arranged below it along the upper row of flames, and a mixture of fuel gas and air in the upper row of flames and the lower row of flames. Air mixture supply means for independently supplying air, and gas amount adjusting means for adjusting the amount of gas supplied to each flame mouth row of the mixture air supply means are provided, and one of the flame mouth rows is connected to the other flame mouth. Compared to the row, the area of each flame port is made smaller to reduce the amount of combustion, and when the gas amount is adjusted to the minimum side by the gas amount adjusting means, only the other flame port is set to extinguish. That is the summary.

A burner for a gas cooker according to a second aspect of the present invention is the burner for a gas cooker according to the first aspect, in which the area of each lower burner row is smaller than that of the upper burner row. The gist is to reduce the amount of combustion by reducing.

In the burner for a gas cooker according to claim 1 of the present invention having the above-mentioned structure, an upper stage flame port array in which a plurality of flame ports are arranged on the circumference and a lower stage flame port array are formed in the lower part, When the mixture supplied independently to each flame nozzle row is burned and the gas amount is adjusted to the minimum side by the gas amount adjusting means, only the flame nozzle row with a large amount of combustion is extinguished, so the power control range is wide. It's good to catch fire. For example, when maximizing the thermal power, maximizing the amount of combustion in both row of nozzles, and minimizing the thermal power,
Extinguish the flame row with a large amount of combustion and make the remaining flame row a minimum amount of combustion. Therefore, it is possible to adjust from large thermal power to small thermal power. Further, at the time of ignition, first, one of the flame port rows is ignited and transferred to the other flame port array, and at the same time, the flame is transferred to the entire flame ports on the circumference of both flame port arrays. The flames formed at the individual flame mouths are adjacent to each other in the vertical and horizontal directions, so that the flame transitions smoothly.

In the burner of the gas cooker according to the second aspect of the present invention having the above-mentioned structure, the lower flame row burns with a smaller amount of combustion than the upper flame row, so that only the lower flame row burns. In addition, it can be adjusted to a smaller firepower. Moreover, when the cooking pot is placed on the upper part of this burner, the lower row of burners is at the bottom of the upper row of flames and the distance between the cooking pot and the lower row of flames is long, so only the lower row of flames is used. By burning it, only a very weak amount of heat is given to the cooking pot. Therefore, it is possible to adjust the heat power to an extremely low level.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to further clarify the structure and operation of the present invention described above, preferred embodiments of the burner of the gas cooker of the present invention will be described below with reference to the drawings. As shown in FIG. 1, the burner used for the gas table cooker is a substantially disc formed of a burner body 2 formed by press-molding a stainless thin plate and a hot forged product such as brass placed on the burner body 2 from above. The burner head 3 and the fuel supply unit 10 having a nozzle and a safety valve for supplying a fuel gas. The burner body 2 has an independent upper and lower two-tier room structure,
An upper mixing pipe 4a and a lower mixing pipe 4b for mixing the fuel gas introduced from the fuel supply unit 10 with the primary air, and an annular mixture located downstream of the upper mixing pipe 4a and the lower mixing pipe 4b for annular distribution of the mixture to the burner head 3. The upper mixing chamber 5a and the lower mixing chamber 5b are integrated. Therefore, two types of burners can be formed simply by partitioning the burner main body 2, and the cost can be reduced as compared with the case where the burner main body 2 is produced separately. The upper mixing chamber 5a and the lower mixing chamber 5b are respectively opened to the upper part, and when the burner head 3 is placed on the upper part, the first pressure equalizing chamber 8 integrated with the upper mixing chamber 5a and the lower mixing chamber 5b is formed.
a, the second pressure equalizing chamber 8b is formed. This first pressure equalizing chamber 8a,
From the second pressure equalizing chamber 8b, an upper stage flame port array 3a and a lower stage flame port array 3b provided on the periphery of the burner head 3 open. A cylindrical positioning guide 9 is provided at the center of the air-fuel mixture outlet (the side where the burner head 3 is fitted) of the lower mixing chamber 5b, and the central portion of the burner head 3 is fitted therein. Burner head 3 is 2 up and down
By stacking in stages, an upper stage flame port array 3a and a lower stage flame port array 3b each having a number of comb-teeth-shaped grooves are provided on the periphery, and a cylindrical first guide 6a and second cylindrical guide 6b are provided at the center. First guide 6
a has a smaller diameter than the second guide 6b, and the second guide 6b
It fits into the positioning guide 9 of the burner body 2 inside.
Comparing the individual flame ports of the upper flame port array 3a and the lower flame port array 3b, as shown in FIG. 3, the lower flame ports are smaller than the upper flame ports. A temperature sensor 17 for preventing overheating is provided in the center of the burner (center of the burner head 3) so as to contact the bottom of the pan 1. A thermocouple 18 for detecting extinguishment and an electrode 1 for discharging sparks for ignition are provided in the vicinity of the lower flame row 3b.
9 are provided. The fuel supply unit 10 includes an electromagnetic safety valve 12 that opens and closes a fuel gas supply passage from a pipe 11, a main valve 13 that is also inserted into a spindle 28 downstream thereof to open and close a fuel gas passage, and further downstream thereof. A first needle valve 14a and a second needle valve 14b that adjust the flow rate of the fuel gas passing therethrough, an upper nozzle 15a and a lower nozzle 15b that eject the fuel gas to the burner body 2, and a control unit (not shown) that controls combustion control. Etc. The first needle valve 14a and the second needle valve 14b are shown on the same cross section for the sake of clarity in FIG. 1, but the second needle valve 14b is on the front side when viewed from the cross section so as not to interfere with each other. The first needle valve 14a is provided at the rear part. Of course, the fuel gas passage is also provided independently. The first needle valve 14a and the second needle valve 14b include a first thermal power adjustment lever 16a that can be operated left and right or up and down.
A second heating power adjustment lever 16b is provided. The first needle valve 14a is adjusted from fully open (high heat) to fully closed (fire extinguishing) by the first heat power adjusting lever 16a, and the second needle valve 14b is changed from fully open (low heat) to minimum (low heat) by the second heat power adjusting lever 16b. It is adjusted up to the heat.

The fuel gas is supplied from the pipe 11 to the fuel supply unit 10
Is guided to the burner body 2 via. First, the main valve 13 is opened by operating an ignition unit (not shown), and then the electromagnetic safety valve 12 is pushed open. In addition, the fuel gas is
Each of the first needle valve 14a and the second needle valve 14
The flow rate is increased / decreased at b, and the upper mixing pipe 4a and the lower mixing pipe 4b are connected from the upper nozzle 15a and the lower nozzle 15b to the burner body 2.
Squirted to. Along with the ejection of the fuel gas, ambient air is taken into the upper mixing pipe 4a and the lower mixing pipe 4b as primary air for combustion, and the mixture of fuel gas and air is sent to the upper mixing chamber 5a and the lower mixing chamber 5b. . The air-fuel mixture in the upper mixing chamber 5a and the lower mixing chamber 5b fills the first pressure equalizing chamber 8a and the second pressure equalizing chamber 8b in the upper part, and is jetted from the upper flame port row 3a and the lower flame port row 3b to the peripheral edge. . The upper stage flame outlet row 3a and the lower stage flame outlet row 3b form a ring-shaped first flame 7a and second flame 7b. Lower flame row 3
Since the flame opening area of b is made smaller than the flame opening area of the upper stage flame opening row 3a, the second flame 7b burns with a smaller amount of combustion than the first flame 7a when both are adjusted to the maximum heat power. When the thermocouple 18 faces the second flame 7b and the combustion state becomes poor or misfires and the thermoelectromotive force changes, the control unit closes the electromagnetic safety valve 12.

In order to ignite this burner, the mixture gas is ejected from the burner head 3 and at the same time, the electrode 19 is discharged to ignite a spark for ignition, and first, the mixture gas ejected from the lower stage flame row 3b is ignited. The ignited flame is immediately transferred to the air-fuel mixture ejected from the adjacent upper flame outlet row 3a and also transferred to the entire flame outlet on the circumference to complete the first flame 7a and the second flame 7b. To form. The fire transfer at this time is very good because the burner head 3 radially forms two upper and lower rows of flame ports on the outer circumference, and the flames at each flame port are adjacent to each other vertically and horizontally. Further, the heating power of this burner can be independently adjusted steplessly by the first heating power adjusting lever 16a and the second heating power adjusting lever 16b. Moreover, cooking pot 1
The lower-stage lower flame row 3b of the lower stage, which is farther away, has a smaller amount of combustion than the upper-stage flame row 3a of the upper stage.
When burned by itself, the cooking pot 1 gives only a very weak amount of heat. Therefore, as shown in FIG. 2, the entire burner power adjustment range of the burner is the upper flame row 3a and the lower flame row 3
It is possible to adjust from high heat to low heat over a wide range that combines the combustion amount and the adjustment range of b. For example, when the heating power is maximized, the combustion amount of the upper flame outlet row 3a and the lower flame outlet row 3b is maximized, and when the heating power is minimized, the upper flame outlet row 3a.
And extinguishes the flame of No. 2 and makes the lower stage flame mouth row 3b the minimum combustion amount. In this way, it is possible to burn with an extremely small amount of combustion, which widens the range of cooking and is convenient. In other words, from stir-fried foods such as yakisoba or Chinese foods that require strong fire power to simmered foods that use simmering fire, it is possible to cook with the same burner. In the center of the burner, the cylindrical first
The guide 6a can be used to provide a temperature sensor 17 for preventing overheating, and it is convenient and safe to stop combustion when cooking is completed or when the pot 1 overheats. Although the embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and it is needless to say that the present invention can be implemented in various modes without departing from the scope of the present invention. For example, in the present embodiment, the lower flame port array 3b was burned with a smaller amount of combustion than the upper flame port array 3a, but the combustion amount may be reversed. In other words, the upper row of flame ports is burned with a smaller amount of combustion than the lower row of flame ports. In this case, the thermal power can be adjusted in the same manner as in the present embodiment, and when the flame in the upper stage flame row is burning simultaneously with the lower stage flame row, heat is received from the flame in the lower stage flame row and combustion is stabilized. Further, also in the gas amount adjusting means, in the present embodiment, the first heat power adjusting lever 16a and the second heat power adjusting lever 16b can be independently adjusted steplessly, but the second heat power adjusting lever 16b is eliminated. The second flame 7b of the lower flame row 3b is kept constant, and the first flame 7 of the upper flame row 3a is controlled only by the first heat power adjusting lever 16a.
It is also possible to adjust only a and adjust the overall heat power. If the second flame 7b is melted, the heat power can be adjusted from strong heat to melted heat with a simpler configuration than that of the present embodiment.

[0011]

As described in detail above, claim 1 of the present invention
The burner for the gas cooker described is easy to use as it can be adjusted from maximum to minimum power. Also, since the flames formed by the individual flame ports are adjacent to each other in the vertical and horizontal directions,
Fire transfer during ignition is very good.

The burner of the gas cooker according to the second aspect can burn even a very small amount of combustion, so that it can be used for a variety of dishes, for example, from Chinese dishes that require strong heat to cooked foods that use simmering heat. Easy to cook and use.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a burner of a gas cooker as an example.

FIG. 2 is a diagram illustrating the relationship between the movement of a heating power adjustment lever and the heating power.

FIG. 3 is a side view of a flame mouth.

FIG. 4 is a schematic configuration diagram of a burner (parent-child burner) of a gas cooker as a conventional example.

[Explanation of symbols]

 2 burner main body 3 burner head 3a upper stage flame row 3b lower stage flame row 4a upper mixing pipe 4b lower mixing pipe 5a upper mixing chamber 5b lower mixing chamber 6a first guide 6b second guide 7a first flame 7b second flame 8a second 1 Pressure equalizing chamber 8b Second pressure equalizing chamber 9 Positioning guide 10 Fuel supply part 14a First needle valve 14b Second needle valve 16a First heat power adjusting lever 16b Second heat power adjusting lever

Claims (2)

[Claims] 1. An upper-stage flame port array for arranging a plurality of flame ports on the circumference to burn a mixture of fuel gas and air, and a plurality of flame ports at the lower portion along the upper-stage flame port array. An array of lower flame outlets, an air-fuel mixture supply means for independently supplying a mixture of fuel gas and air to the upper and lower flame outlet rows, and to each of the flame outlet rows of the air-fuel mixture supplying means. And a gas amount adjusting means for adjusting the supply gas amount of each of the above-mentioned ones, to reduce the combustion amount by reducing the area of each flame port compared to the other flame port array to reduce the combustion amount. A burner for a gas cooker, characterized in that it is set such that only the other flame port row is extinguished when the amount of gas is adjusted to the minimum side by means. 2. The burner for a gas cooker according to claim 1, wherein the lower flame port array has a smaller area of each flame port than the upper flame port array to reduce the amount of combustion.