JPH1030806A - Gas cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wide heating power adjustment range by changing over from the state of fuel gas to be supplied to both pressure-equalizing compartments to the state of fuel gas to be supplied only to the upper pressure-equalizing compartment when the flow rate of supply gas is changed from high to low. SOLUTION: An upper pressure-equalizing compartment 36 is formed when a second burner head 33 is loaded on the upper part of a first burner head 32. A resistor 34 is provided in a central open hole 9 where the resistor 34 is provided with a round hole which regulates the amount of mixed air which flows into the upper pressure- equalizing compartment 36. In the when the amount of supply gas to a burner is reduced from a maximum to a minimum by operating a gas adjustable control 15, if the flow rate of gas to be supplied to a side pressure-equalizing compartment 35 reaches a specified flow rate, a turbulent mixed gas, which flows in a mixing pipe 4 turns into a laminar flow running only in the upper area and the mixed gas flows only into the upper pressure-equalizing compartment 36 and is prevented from flowing into the side equalizing compartment 35. Combustion flames of a first row of burner ports 38 are extinguished. This construction makes it possible to throttle the heating power of a burner having a larger capacity to a low flame capable of cooking food boiled and seasoned.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas cooker provided with a gas amount regulator.

[0002]

2. Description of the Related Art Conventionally, when cooking various dishes by heating, it is necessary to adjust a wide range of heat power according to the cooking. However, a single burner cannot cover a wide range of heat power adjustment required for cooking. There are known two-port stoves having left and right sides of a large burner designed so as to obtain a small burner and a small burner designed so as to obtain a low heat suitable for boiled dishes (hereinafter referred to as simmering fire). In other words, the large burner extinguishes the flame without forming a flame at the flame outlet when it is set to low heat, and the small burner burns with high heat and incomplete combustion occurs. We use burner properly. As shown in FIG. 5, a child burner 35 designed for low heat is provided in the center and a parent burner 31 designed for high heat is provided on the outer periphery of the child burner 35 in combination with each other. Is known.

[0003]

However, in the former two-port cooker, it is inconvenient for the user to use a large burner and a small burner depending on the cooking, and it is inconvenient. The latter parent-child burner 30 is a combination of independent large burners and small burners, and has a wide range of adjustment of thermal power, but has a switch for supplying fuel gas to each burner, a nozzle and a gas amount. This requires a thermal power controller to be used, which complicates the structure. In addition, since each of them has a burner body and a burner head, the number of parts is increased, resulting in poor productivity. In addition, flame 31 of parent and child burner
Since a and 35a are separated, the fire transfer between both flames 31a and 35a is poor. Moreover, the thermocouple 3 of the safety device that goes out
Since there was no place where the flame 6a could be used for both the parent and child flames 31a and 35a, the flame 6a was exposed only to the flame 35a of the child burner 35. In order to detect the misfire of the parent burner 31 by ignoring this, there is a problem such that another thermocouple is required for the flame 31a of the parent burner 31.

[0004] The gas cooker of the present invention solves the above problems,
It is an object of the present invention to provide a gas cooker with a simple structure and a wide range of heat power adjustment.

[0005]

According to a first aspect of the present invention, there is provided a gas cooker comprising: a burner for burning fuel gas; and a gas amount adjusting means for adjusting an amount of gas supplied to the burner. In the gas cooker provided with the above, the burner is provided with a mixing pipe provided substantially vertically, a cylindrical upper pressure equalizing chamber provided at an upper end of the mixing pipe, and having a number of flame ports arranged on an outer peripheral edge thereof; A side pressure equalizing chamber which is annularly provided around the periphery of the mixing tube and communicates with the mixing tube through an opening formed on a side of the mixing tube, and has a plurality of flame ports arranged on an outer peripheral edge thereof; When the fuel gas is supplied to the pressure chamber and the amount of gas supplied to the mixing pipe is changed from large to small, the state in which the fuel gas is supplied to both pressure equalizing chambers is reduced to only the upper pressure equalizing chamber. The point at which the state of supply is switched to the adjustment range of the gas amount adjustment means And summarized in that set to.

A gas cooker according to a second aspect of the present invention for solving the above-mentioned problem is characterized in that a resistor is detachably provided at an inlet of the upper pressure equalizing chamber.

According to a third aspect of the present invention, there is provided a gas cooker according to the third aspect of the present invention, wherein the upper and lower pressure equalizing chambers are provided at outer peripheral edges of the upper pressure equalizing chamber and the side pressure equalizing chamber, respectively. The point is that it is formed at the position.

According to a fourth aspect of the present invention, there is provided a gas cooker according to the present invention, wherein a row of the flame ports of the upper pressure equalizing chamber has an area of each flame port as compared with a row of the flame ports of the side pressure equalizing chamber. The point is that the combustion amount is reduced by reducing the amount of combustion.

In the gas cooker according to the first aspect of the present invention having the above structure, the turbulent air-fuel mixture passed through the mixing pipe of the burner flows into the upper pressure equalizing chamber and the side pressure equalizing chamber, and the respective flames. It gushes out of the row and forms a flame. When the supply gas amount is adjusted from large to small by the gas amount adjustment means and reaches a predetermined supply gas amount, the flow of the air-fuel mixture in the mixing pipe becomes a laminar flow having a flow only upward from the turbulent state up to now. Become. For this reason, the air-fuel mixture flows only into the upper pressure equalizing chamber provided at the upper end of the mixing pipe, and does not flow into the side pressure equalizing chambers, and the combustion flame in the row of flames is extinguished. Therefore, the gas supplied to the burner is supplied only to the flame row of the upper pressure equalizing chamber and burns.
The amount of combustion can be reduced to the lower limit combustion gas amount of the flame row. That is, since the two rows of burner ports are switched to one row, the amount of combustion of the burner can be reduced by half, so that the amount of combustion of the burner can be reduced. Further, since the mixing pipe is provided vertically, the direction in which the draft force is applied also becomes the same upward as the direction in which the air-fuel mixture proceeds, and the tendency to supply only the upper pressure equalizing chamber is further increased.

In the gas cooker according to the second aspect of the present invention having the above-described structure, the resistor is detachably provided at the inlet of the upper pressure equalizing chamber. It is possible to easily set the point of the gas amount at which the gas is switched to the supplied state. In other words, by changing the resistor, it can be set so that even when the specific gravity, the calorific value, and the like of the fuel gas are different, the state is switched to the state of being supplied only to the upper pressure equalizing chamber when the supply gas amount is the predetermined amount. Therefore, even if the gas amount becomes equal to or less than the flammable limit, it is possible to easily prevent the unburned gas from being ejected from the flame port without switching.

In the gas cooker according to the third aspect of the present invention having the above-described structure, the flame opening rows on the outer peripheral edges of the upper pressure equalizing chamber and the side pressure equalizing chamber are formed at vertically adjacent positions, so that the gas cooker at the time of ignition can be used. Fire transfer can be performed reliably.

In the gas cooker according to the fourth aspect of the present invention having the above structure, the upper equalizing chamber burns with a smaller amount of combustion than the side equalizing chambers. When the fuel is burned only by the row of flames in the chamber, it can be adjusted to a smaller heating power.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to further clarify the structure and operation of the present invention described above, a preferred embodiment of the gas cooker of the present invention will be described below. FIG. 1 is a schematic configuration diagram of a gas stove as one embodiment. The gas stove of the present embodiment is roughly divided into an ignition unit 10 for performing an ignition operation and a combustion unit 20 for burning fuel gas. Ignition part 10
Is a front operation panel 17, a push-type operation button 11, and a magnet safety valve 2 for opening and closing the fuel gas flow path.
2 and a main valve 2 that opens and closes a fuel gas flow path downstream thereof
3, a spindle 18 which is inserted in the middle of a main valve 23 and pushes a magnet safety valve 22 at a tip thereof, and a needle valve 2 which further adjusts a fuel gas flow rate to a combustion section 20 further downstream thereof.
4, and a heating power adjustment knob 15 for operating the needle valve 24 to adjust the heating power of the burner flame.

The combustion section 20 includes a stove burner 30 for burning the fuel gas, a nozzle 21 for ejecting the fuel gas to the stove burner 30, and an electrode 26 for igniting the mixed gas by applying a high voltage to discharge. And a thermocouple 28 for monitoring the flame of the stove burner 30.

The stove burner 30 is composed of a burner body 31 for mixing a fuel gas and primary air, and a hot forged product such as brass or the like which forms a first flame port 38 by being placed on the burner body 31. An annular first burner head 32, and a disk-shaped second burner head 33 made of a hot forged product such as brass that is placed on the first burner head 32 to form the second flame port 39. Consists of

The burner main body 31 has a venturi-shaped mixing pipe 4 for mixing the fuel gas supplied from the nozzle 21 with the primary air sucked by the jet of the nozzle, and an annular lower part around the upper end of the mixing pipe 4. The member 6 is formed in an umbrella shape. The passage 5 and the side pressure equalizing chamber 35 are formed when the first burner head 32 is placed on the upper part thereof. Also,
Locking portion 8 provided with round hole for locking first burner head 32
a are provided at a plurality of locations 6 on the side pressure equalizing chamber surface.

The first burner head 32 is formed in a disk shape, has a number of comb-like grooves on the periphery, and has a burner body 31.
On the upper surface of the annular member 6, a large number of first flame port rows 38 are formed on the peripheral edge. At the center, a cylindrical projection having a central opening hole 9 which is coaxial with the mixing pipe 4 and has the same diameter as the inner diameter of the upper end thereof is opposed to the upper end face of the mixing pipe 4 via the passage 5. . Further, a plurality of bar-shaped locking pieces 7a for positioning with the burner main body 31 are provided on the lower surface at a plurality of positions, and are inserted into the locking portions 8a of the burner main body. A plurality of locking portions 8b having round holes for locking the second burner head are provided on the upper surface thereof. The central opening hole 9 is provided with a resistor 34 having a round hole for regulating the amount of air-fuel mixture flowing into the upper pressure equalizing chamber 3b. In addition, the upper pressure equalizing chamber 36 is
It is formed when the second burner head 33 is placed on the burner head 32.

The second burner head 33 is formed in a disk shape, has a large number of comb-shaped grooves on the periphery, and is mounted on the outer peripheral upper surface of the first burner head to form a large number of second burner port rows 3.
9 are formed on the periphery. Further, a plurality of bar-shaped locking pieces 7b for locking the second burner head are provided on the lower surface inside the flame outlet. In addition, comparing the individual flame ports of the first flame port row 38 and the second flame port row 39, as shown in FIG. 4, each flame port of the second flame port row 39 is the flame of the first flame port row 38. It is set smaller than the mouth. In addition, the entire flame port area is set smaller in the second flame port row than in the first flame port row.

Next, the operation of the gas cooker of this embodiment will be described. When the operation button 11 is pushed, the button shaft 13 is pushed through the ignition lever 12 behind the operation button 11 and the spindle 1 is pushed.
8 slides to open the main valve 23 and the magnet safety valve 22 in the fuel gas passage, and turns on an igniter (not shown) interlocked with the movement of the button shaft 13. Then, electricity is supplied from a dry battery (not shown), and discharge is performed at the electrode 26 by the function of the igniter. The mixed gas of the fuel gas and the primary air passes through the mixing pipe 4 and passes through the side pressure equalizing chamber 3.
5, is supplied to the upper pressure equalizing chamber 36, is ejected from the first and second rows of flame ports 39, and is ignited by discharge. Then, even if the operation button 11 is released, the button shaft 13 is locked in the middle of the retreat, and the main valve 23 is kept open. At the same time, since the magnet safety valve 22 is opened and held by the electromotive force of the thermocouple 28 due to the combustion heat, the fuel gas is continuously supplied and the combustion continues. At this time, the heating power adjustment knob 15 is operated as required for cooking, the fuel gas flow rate is adjusted by the needle valve 24, and the heating power of the burner flame is adjusted. Operation button 11
When the button is pressed again, the lock of the button shaft 13 is released, the spindle 18 retreats, the main valve 23 closes and the fire extinguishes. At the same time, the generation of the electromotive force of the thermocouple 28 disappears and the magnet safety valve 2
Close 2 as well.

Next, the transition of the amount of air-fuel mixture supplied to each row of flame ports during the adjustment of the thermal power will be described with reference to FIG. By operating the gas amount adjusting knob 15 to reduce the supply gas amount to the burner from the maximum supply gas amount c to the minimum supply gas amount a as shown in transition (a), the side pressure equalizing chamber 35 As shown in transition (b), the supplied gas amount decreases uniformly up to the predetermined position B of the knob, but when it reaches the predetermined gas amount b at the predetermined position B, the turbulent flow flowing through the mixing pipe 4 The air-fuel mixture becomes a laminar flow having only an upward flow, and the air-fuel mixture flows only into the upper pressure equalization chamber 36, the flow of the air-fuel mixture into the side pressure equalization chamber 35 is stopped, and The burning flame extinguishes. Further, as shown in transition (C), the amount of gas supplied to the upper pressure equalizing chamber 36 gradually decreases the supply gas amount, and when the amount decreases to the predetermined position B of the knob, all the supply gas flows in. Therefore, the supply gas amount of the second flame port row 39 increases from the point a to the point b. Therefore, it is possible to further reduce the supplied gas amount by operating the gas amount adjusting knob 15 from the point B to the point A, and to reduce the gas amount to the extinguishing limit gas of the combustion flame of the second flame port row 39, that is, the minimum supplied gas amount a. it can. Further, the position of the gas amount adjustment knob 15 at that time is set to the minimum low heat position A.
Since the flame is not extinguished due to excessive squeezing, the amount of gas that can be cooked can be reduced.

The state of the flame is as shown in FIG.
When the gas amount adjustment knob 15 is at the point C of the high heat position, the first
Both the flame row 38 and the second flame row 39 burn with a large flame, and when the knobs are squeezed, the flames of both the flame ports are gradually reduced in a similar shape until just before the predetermined point B, When the temperature drops to the point B, the flame in the first flame row 38 extinguishes, and
Flames in the flame outlet increase. When the knob 15 is further squeezed to the amount of low-fire gas at the point A, the flame in the first flame row is extinguished and the flame in the second flame port is gradually reduced while keeping the similar shape.

When the gas amount adjusting knob is adjusted from the low heat point A to the high heat, the laminar air-fuel mixture flowing through the mixing pipe 4 at the predetermined position B becomes turbulent and flows into the side pressure equalizing chamber 35. As a result, the air-fuel mixture is ejected from the first row of burner ports 38, and the second burner row is ignited. In addition, the first burner port row 38 and the second burner port row 39 are vertically close to each other, so that the fire is satisfactorily performed. Then, the flames of both the flame outlets gradually increase to the point C of the high flame.

A resistor 3 is provided at the entrance of the upper pressure equalizing chamber 36.
4 and the flame area of the second flame row 39 is made smaller than the flame area of the first flame row 38, so that when the heating power is adjusted to the maximum by the needle valve 24, the second flame row The 39 flame burns with a smaller amount of combustion than the first flame row 38.
Further, the flame igniting the air-fuel mixture ejected from the second row of burners 39 ignites over the entire circumference of the second row of burners 39 and also the first burner row 38 to form a flame. The fire transfer at this time is very good because two upper and lower rows of flame ports are formed, and the flames of each flame port are adjacent to each other vertically, horizontally and vertically. Also,
As shown in FIG. 2, the heating power adjustment range of the stove burner 30 extends over a wide range (maximum c to minimum a) obtained by combining the adjustment ranges of the combustion amounts of the first flame port row 38 and the second flame port row 39. Adjustable from high heat to low heat. In other words, it is possible to cook with the same burner from stir-fried noodles such as fried noodles, which require strong heat, and Chinese food, to stewed foods using simmering fire.

As described above, according to the gas cooker of the present invention, the gas burner 30 is controlled by the gas amount adjusting knob 15.
When the supply gas amount to the supply gas is adjusted from large to small and reaches the predetermined supply gas amount b, the supply of the air-fuel mixture to the side pressure equalization chamber 35 is stopped, and only the upper pressure equalization chamber 36 is supplied. Therefore, the combustion limit gas amount of only the second flame port row 39 can be reduced. Further, since the second flame port array 39 of the upper pressure equalizing chamber 36 is formed by a small flame port, the combustion limit gas amount can be further reduced. Therefore, when a burner with a high capacity can cook a stewed dish, it can be squeezed to a low heat. Further, two independent switches and thermal power regulators like the parent and child burners are not required, and the number of parts may be reduced with a simple configuration, and productivity is improved. Also, the second flame port array 39 is
Since it is provided at a position close to and above the flame port row 38, even if the switching point is slightly shifted and the unburned gas leaks from the first flame port row 38, it is burned by the flame of the second flame port row 39. This prevents the unburned gas from diffusing around the stove.

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 spirit of the present invention. It is.

[0026]

As described above in detail, according to the gas cooker of the present invention, the point at which the state is switched to the state of being supplied only to the upper pressure equalizing chamber is set within the adjustment range of the gas amount adjusting means, so You can adjust the heating power from power to boiling when you can cook food. Therefore, the heating power adjustment range is widened and the usability is good. In addition, productivity can be improved because it can be manufactured with a simple structure.

According to the gas cooker of the second aspect of the present invention, since the resistor is detachably provided at the inlet of the upper pressure equalizing chamber, only the upper pressure equalizing chamber is provided in accordance with the type of fuel gas. The setting of the point at which the state is switched to the supplied state can be easily changed. Therefore, even if the kind of the fuel gas is different, the setting can be made only by the resistor, so that the maintenance property is excellent.

According to the gas cooker of the third aspect of the present invention, the upper and lower pressure equalizing chambers and the outer peripheral edge of the side pressure equalizing chamber are formed at the upper and lower adjacent positions, so that the gas cooker at the time of ignition is formed. Fire transfer can be performed reliably. In addition, even if unburned gas leaks from the flame port row of the side pressure equalizing chamber, it is burned by the flame of the flame port row of the upper pressure equalizing chamber, so that diffusion of the unburned gas to the surroundings is prevented.

According to the gas cooker according to the fourth aspect of the present invention, the area of each flame port of the upper pressure equalizing chamber is smaller than that of the side pressure equalizing chamber. In the case of burning only with the flame port row of the upper pressure equalizing chamber, the combustion power can be further adjusted to a small value.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a stove burner as one embodiment.

FIG. 2 is an explanatory diagram showing a relationship between the movement of a heating power adjustment knob and the heating power.

FIG. 3 is an explanatory diagram showing a relationship between a position of a heating power adjustment knob and a flame.

FIG. 4 is a side view of a flame outlet.

FIG. 5 is a schematic configuration diagram of a gas cooker (parent-child burner) as a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 3 ... Upper equalizing chamber upper surface 4 ... Mixing pipe 5 ... Passage 6 ... Side equalizing chamber upper surface 7a, 7b ... Locking piece 8a, 8b ... Locking part 9 ... Opening hole 10 ... Ignition part 15 ... Thermal power adjustment knob 21 ... Nozzle 23 ... Main valve 24 ... Needle valve 26 ... Electrode 28 ... Temperature thermocouple 30 ... Rot burner 31 ... Burner main body 32 ... First burner head 33 ... Second burner head 34 ... Resistor 35 ... Side pressure equalizing chamber 36 ... Upper equalizing chamber 38 ... First flame row 39 ... Second flame row

Claims (4)

[Claims] 1. A gas cooker comprising: a burner for burning fuel gas; and gas amount adjusting means for adjusting an amount of gas supplied to the burner, wherein the burner is provided with a mixing pipe provided substantially vertically, A cylindrical upper pressure equalization chamber provided at the upper end of the pipe and having a number of flame ports arranged on an outer peripheral edge thereof, and an annular opening provided around the mixing pipe and formed in a side of the mixing pipe to communicate with the mixing pipe. A side pressure equalizing chamber having a number of flame ports arranged on an outer peripheral edge thereof, and a fuel gas is supplied from the mixing pipe to both of the pressure equalizing chambers, and a supply gas amount to the mixing pipe is reduced from large to small. When the fuel gas is changed, a point at which the state in which the fuel gas is supplied to both the pressure equalizing chambers and a state in which the fuel gas is supplied only to the upper pressure equalizing chamber is set within an adjustment range of the gas amount adjusting means. And gas cooker. 2. The gas cooker according to claim 1, wherein a resistor is detachably provided at an inlet of the upper pressure equalizing chamber. 3. The flame opening row provided on the outer peripheral edge of each of the upper pressure equalizing chamber and the side pressure equalizing chamber is formed at a vertically adjacent position. Gas cooker. 4. The flame array of the upper pressure equalizing chamber has a smaller area of each flame port than the flame port array of the side pressure equalizing chamber to reduce the amount of combustion. The gas cooker according to any one of 1 to 3.