JP3524689B2 - Gas cooker - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a gas cooker having a gas amount regulator.

[0002]

2. Description of the Related Art Conventionally, when cooking various dishes, it is necessary to adjust a wide range of heating power according to the cooking, but a single burner cannot cover a wide range of heating power required for cooking, and therefore a high heating power is required. It is known to have a two-mouth stove equipped with a large burner designed to obtain sushi and a small burner designed to obtain a low heat (hereinafter referred to as "torohi") suitable for cooked dishes. In other words, a large burner extinguishes without forming a flame at the mouth when it is simmered, and a small burner causes incomplete combustion when burned with strong heat, so a large burner and a small burner are provided on the left and right, depending on the dish. I'm using different burners. Further, as shown in FIG. 5, a child burner 35 designed for low heat and a parent burner 31 designed for high heat are provided in the central part in a combined manner, and by using them in combination, the heat power adjustment range can be obtained. There is known a parent-child burner 30 having a wide range.

[0003]

However, in the former two-mouth stove, it is troublesome and inconvenient for the user to selectively use the large burner and the small burner depending on the food. The latter parent-child burner 30 is a combination of an independent large burner and a small burner, and has a wide range of adjustment of thermal power, but the switch for supplying the fuel gas to each burner, the nozzle and the gas amount are adjusted. Since it requires a heating power regulator to operate, the structure becomes complicated, and since each has a burner body and a burner head, the number of parts is large and the productivity is poor. In addition, flame 31 of parent and child burner
Since a and 35a are separated, the flame transfer between both flames 31a and 35a is bad. Moreover, the thermocouple 3 of the safety device that disappears
Since there is no place where 6 can be used as both parent and child flames 31a and 35a and 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 it is attempted to detect the misfire of the parent burner 31 by avoiding this, there is a problem that the flame 31a of the parent burner 31 also needs another thermocouple.

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

[0005]

A gas cooker according to claim 1 of the present invention for solving the above-mentioned problems comprises a burner for burning fuel gas, and a gas amount adjusting means for adjusting the amount of gas supplied to the burner. In the gas cooker provided with the above-mentioned burner, the burner is provided substantially vertically, a cylindrical upper pressure equalizing chamber having a large number of flame openings arranged at the upper end of the mixing pipe, and the mixing pipe. The mixing tube is provided with a side pressure equalizing chamber, which is provided in an annular shape around the periphery of the mixing tube and is connected to the mixing tube through an opening formed on the side of the mixing tube. It supplies the fuel gas to the chamber, when varying the amount of gas supplied to the mixing tube in the large to small, you above mixing tube
The flow of the air-fuel mixture in the turbulent state has an upward flow only.
Becomes a laminar flow, the air-fuel mixture cut <br/> replacement ready to be supplied only to the upper equalizing chamber from the state supplied evenly pressure chamber of both the comparatively, the gas amount adjustment points this switching The gist is that it is set within the adjustment range of the means.

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

In the gas cooker according to the third aspect of the present invention which solves the above-mentioned problems, the flame port arrays provided on the outer peripheral edges of the upper pressure equalizing chamber and the side pressure equalizing chambers are vertically adjacent to each other. The point is that it is formed at the position.

In the gas cooker according to the fourth aspect of the present invention which solves the above-mentioned problems, the area of each flame port of the upper pressure equalizing chamber is larger than that of the side pressure equalizing chamber. The gist is to reduce the amount of combustion by reducing.

In the gas cooker according to claim 1 of the present invention having the above structure, the turbulent air-fuel mixture that has passed through the mixing pipe of the burner flows into the upper pressure equalizing chamber and the side pressure equalizing chambers, and the respective flames are burned. Eject from the mouth row to form a flame. Then, when the amount of supply gas is adjusted from large to small by the gas amount adjusting means to reach a predetermined amount of supply gas, the flow of the air-fuel mixture in the mixing pipe becomes a laminar flow having only an upward flow from the turbulent flow state so far. Become. Therefore, the air-fuel mixture only flows into the upper pressure-equalizing chamber provided at the upper end of the mixing pipe and does not flow into the side-equal pressure-equalizing chamber, so that the combustion flame in the flame port array is extinguished. Therefore, the gas supplied to the burner is supplied only to the flame port array of the upper pressure equalizing chamber and burns,
The combustion amount can be reduced to the lower limit combustion gas amount of the flame row. That is, since the two rows of flame ports are switched to one row, the burner combustion amount can be halved, so that the burner combustion amount can be reduced. Further, since the mixing pipe is provided vertically, the direction in which the draft force is applied is also the same as the advancing direction of the air-fuel mixture, and the tendency to be supplied only to the upper pressure equalizing chamber becomes stronger.

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

In the gas cooker according to the third aspect of the present invention having the above-mentioned structure, since the flame port arrays on the outer peripheral edges of the upper pressure equalizing chamber and the side pressure equalizing chambers are formed in the vertically adjacent positions, it is possible to ignite at the time of ignition. It is possible to reliably carry out a fire transfer.

In the gas cooker according to the fourth aspect of the present invention having the above-mentioned structure, since the flame port row of the upper pressure equalizing chamber burns with a smaller amount of combustion than the flame port row of the side pressure equalizing chamber, It can be adjusted to a smaller firepower when it is burned only in the flame row of the chamber.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION In order to further clarify the structure and operation of the present invention described above, preferred embodiments of the gas cooker of the present invention will be described below. FIG. 1 is a schematic configuration diagram of a gas stove as an embodiment. The gas stove of the present embodiment roughly includes an ignition unit 10 that performs an ignition operation and a combustion unit 20 that combusts a fuel gas. Ignition part 10
Is a front operation panel 17, a push-type operation button 11, and a magnet safety valve 2 that opens and closes a fuel gas passage.
2 and a main valve 2 that opens and closes the flow path of the fuel gas downstream thereof
3, a spindle 18 that inserts the main valve 23 in the middle and pushes the magnet safety valve 22 open at the tip, and a needle valve 2 that adjusts the flow rate of fuel gas to the combustion section 20 further downstream thereof.
4 and a heating power adjusting 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 a mixed gas by applying a high voltage and discharging. And a thermocouple 28 for monitoring the flame of the stove burner 30.

The stove burner 30 is composed of a burner main body 31 for mixing fuel gas and primary air, and a hot forged product such as brass forming a first flame port 38 when mounted on the burner main 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 forms the second flame port 39 by being mounted on the first burner head 32. Composed of.

The burner body 31 has a venturi-shaped mixing tube 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 ring around the lower end of the upper end of the mixing tube 4. The member 6 is formed in an umbrella shape. Further, the passage 5 and the side pressure equalizing chamber 35 are formed when the first burner head 32 is placed on the upper portion thereof. Also,
Locking portion 8 provided with a round hole for locking the first burner head 32
a is provided at a plurality of locations on the side pressure equalizing chamber surface 6.

The first burner head 32 is formed in the shape of a disk and has a large number of comb-teeth-shaped grooves on the periphery thereof.
A large number of first flame port arrays 38 are formed on the peripheral edge by being mounted on the upper surface of the annular member 6. Further, a cylindrical projection having a central opening hole 9 coaxial with the mixing tube 4 and having the same inner diameter as the upper end of the mixing tube 4 faces the upper end surface of the mixing tube 4 via the passage 5. . Further, a plurality of rod-shaped locking pieces 7a for positioning with the burner body 31 are provided on the lower surface at a plurality of positions and are inserted into the locking portions 8a of the burner body. Further, a plurality of locking portions 8b having round holes for locking the second burner head are provided on the upper surface thereof. Further, the central opening hole 9 is provided with a resistor 34 having a round hole for restricting the amount of air-fuel mixture flowing into the upper pressure equalizing chamber 3b. Further, the upper pressure equalizing chamber 36 has a first
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 and has a large number of comb-teeth-shaped grooves on its peripheral edge. By placing the second burner head 33 on the upper surface of the outer periphery of the first burner head, a large number of second flame port arrays 3 are formed.
9 is formed on the periphery. Further, a plurality of rod-shaped locking pieces 7b for locking the second burner head are provided on the lower surface inside the flame port. Further, when comparing the individual flame ports of the first flame port array 38 and the second flame port array 39, as shown in FIG. 4, each flame port of the second flame port array 39 is a flame of the first flame port array 38. It is set smaller than the mouth. Also, the overall flame opening area is set smaller in the second flame opening row than in the first flame opening row.

Next, the operation of the gas cooker of this embodiment will be described. When the operation button 11 is pressed, the button shaft 13 is pressed via the ignition lever 12 behind the operation button 11, and the spindle 1
8 slides to open the main valve 23 and the magnet safety valve 22 in the fuel gas passage, and the igniter (not shown) linked with the movement of the button shaft 13 is turned on. Then, electricity is supplied from a dry battery (not shown), and the electrode 26 is discharged by the action of the igniter. Further, the mixed gas of the fuel gas and the primary air passes through the mixing pipe 4 and the side pressure equalizing chamber 3
5, supplied to the upper pressure equalizing chamber 36, ejected from the first flame port array and the second flame port array 39, and ignited by discharge. Then, even if the operation button 11 is released, the button shaft 13 is locked in the middle of retreating and the main valve 23 is held open. At the same time, the magnet safety valve 22 is kept open by the electromotive force of the thermocouple 28 due to the combustion heat, so that the fuel gas is continuously supplied and the combustion continues. At this time, the heating power adjustment knob 15 is operated as needed for cooking to adjust the fuel gas flow rate by the needle valve 24 to adjust the heating power of the burner flame. Operation button 11
When is pressed again, the button shaft 13 is unlocked, the spindle 18 retracts, the main valve 23 closes, and the fire is extinguished. At the same time, 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 flame port array at the time of adjusting the thermal power will be described with reference to FIG. When the gas amount adjusting knob 15 is operated to decrease the gas amount supplied to the burner from the maximum gas amount c to the minimum gas amount a as shown in transition (a), the side pressure equalizing chamber 35 is set. As shown in the 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 in the mixing pipe 4 is reached. Becomes a laminar flow having only an upward flow, and the air-fuel mixture flows only into the upper pressure-equalizing chamber 36, and the flow of the air-fuel mixture into the side-equal pressure-equalizing chamber 35 is stopped. Extinguish the burning flame. Further, as shown in the transition (C), the amount of gas supplied to the upper pressure equalizing chamber 36 gradually decreases so that all of the supply gas flows in when the amount of gas is decreased to a predetermined position B of the knob. Therefore, the supply gas amount of the second flame port array 39 increases from the point a to the point b. Therefore, it is possible to operate the gas amount adjusting knob 15 from the point B to the point A to further reduce the supply gas amount and to limit the extinction limit gas amount of the combustion flame of the second flame port array 39, that is, the minimum supply gas amount a. it can. In addition, the position of the gas amount adjusting knob 15 at that time is set to the minimum low heat position A.
Since it is set to, there is no chance that the flame will extinguish due to over-squeezing, and the amount of gas that can be used for cooking dishes can be reduced.

The state of flame is as shown in FIG.
When the gas amount adjusting knob 15 is at point C of the high heat position, it is the first
Both the flame outlet row 38 and the second flame outlet row 39 burn with a large flame, and when the knob is squeezed, the flames at both flame outlets gradually become similar to each other until just before the predetermined point B, but When the temperature decreases to point B, the flame in the first row 38 of flames extinguishes, and at the same time the second
The flame at the mouth increases. Then, when the knob 15 is further reduced to the amount of the low-flame gas at the point A, the flame of the first row of flames is extinguished and the flame of the second row of flames is gradually reduced with a similar shape.

Further, when the gas amount adjusting knob is adjusted from low heat A to high heat, the laminar air-fuel mixture flowing through the mixing pipe 4 becomes a turbulent state at a predetermined position B and flows into the side pressure equalizing chamber 35. As a result, the air-fuel mixture is ejected from the first flame port array 38 and the flame is transferred to the second flame port array to ignite. Further, since the first flame port array 38 and the second flame port array 39 are vertically close to each other, the flame is satisfactorily transferred. Then, the flames of both flame mouths gradually increase to the point C of high heat.

At the inlet of the upper pressure equalizing chamber 36, the resistor 3
4 is provided and the flame opening area of the second flame opening row 39 is smaller than the flame opening area of the first flame opening row 38, the second flame opening row is adjusted when the heating power is adjusted to the maximum by the needle valve 24. The flame of 39 burns with a smaller amount of combustion than the first flame port array 38.
In addition, the flame ignited in the air-fuel mixture ejected from the second flame port row 39 transfers to the entire circumference of the second flame port array 39 and also transfers to the first flame port array 38 to form a flame. The fire transfer at this time is very good because the upper and lower two rows of flame openings are formed and the flames at the respective flame openings are vertically and horizontally adjacent to each other. Also,
As shown in FIG. 2, the heating power adjustment range of the stove burner 30 covers a wide range (maximum c to minimum a) obtained by combining the adjustment ranges of the combustion amounts of the first flame port array 38 and the second flame port array 39, Adjustable from high heat to low heat. In other words, from stir-fried dishes such as yakisoba or Chinese dishes that require strong firepower to boiled dishes that use simmering fire, it is possible to cook with the same burner.

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 predetermined supply gas amount b is reached by adjusting the supply gas amount to the upper side to the lower side, the supply of the air-fuel mixture to the side pressure equalizing chamber 35 is stopped and is supplied only to the upper pressure equalizing chamber 36. Therefore, the combustion limit gas amount of only the second flame port array 39 can be narrowed down. Further, since the second flame port array 39 of the upper pressure equalizing chamber 36 is formed with a small flame port, the combustion limit gas amount can be further reduced. Therefore, even if a burner with a large capacity can cook boiled dishes, it can be squeezed to low heat. Further, it is not necessary to provide two independent switches and a thermal power regulator such as a parent-child burner, and a simple configuration may reduce the number of parts, thereby improving productivity. In addition, the second flame row 39 is
Since it is provided at a position close to and above the flame port array 38, even if the switching point is slightly displaced and unburned gas leaks from the first flame port array 38, it is burned by the flame of the second flame port array 39. Therefore, the unburned gas is prevented 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. Is.

[0026]

As described in detail above, according to the gas cooker of the present invention, since the point for switching to the state in which only the upper pressure equalizing chamber is supplied is set within the adjustment range of the gas amount adjusting means, the high heat You can adjust the heating power from the power to the low heat when you can cook cooked dishes. Therefore, the range for adjusting the heat power is wide and the usability is good. Further, since the manufacturing can be performed with a simple structure, the productivity is improved.

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 according to the type of fuel gas. It is possible to easily change the setting of the points that switch to the supplied state. Therefore, even if the type of the fuel gas is different, the setting can be made only by the resistance body, which is excellent in maintainability.

Further, according to the gas cooker of the third aspect of the present invention, since the flame port arrays on the outer peripheral edges of the upper pressure equalizing chamber and the side pressure equalizing chambers are formed at the upper and lower positions close to each other, at the time of ignition. It is possible to reliably carry out a fire transfer. Further, even if the unburned gas leaks from the flame port array of the side pressure equalizing chamber, it is burned by the flame of the flame port array of the upper pressure equalizing chamber, so that the unburned gas is prevented from diffusing to the surroundings.

According to the gas cooker of 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 flame port array of the side pressure equalizing chamber. , If the combustion is done only in the line of flames in the upper pressure equalizing chamber, it can be adjusted to a smaller firepower.

[Brief description of drawings]

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

FIG. 2 is an explanatory diagram showing the 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 heat power adjusting knob and a flame.

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

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

[Explanation of symbols]

3 ... Upper pressure equalizing chamber upper surface 4 ... Mixing tube 5 ... passage 6 ... Side pressure equalizing chamber upper surface 7a, 7b ... Locking piece 8a, 8b ... Locking part 9 ... Opening hole 10 ... Ignition unit 15 ... Fire power adjustment knob 21 ... Nozzle 23 ... Main valve 24 ... Needle valve 26 ... Electrode 28 ... Thermocouple 30 ... stove burner 31 ... Burner body 32 ... First burner head 33 ... Second burner head 34 ... Resistor 35 ... Side pressure equalizing chamber 36 ... Upper pressure equalizing chamber 38 ... 1st flame row 39 ... Second flame row

─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) F23D 14/06 F23D 14/58 F23D 14/62-14/64 F24C 3/08 F24C 3/12

Claims (4)

(57) [Claims] 1. A gas cooker comprising a burner for burning a fuel gas, and a gas amount adjusting means for adjusting the amount of gas supplied to the burner, wherein the burner includes a mixing pipe provided substantially vertically, and the mixing pipe. A cylindrical upper pressure equalizing chamber, which is provided at the upper end of the tube and has a large number of flame openings arranged on the outer peripheral edge, and an opening formed in the side of the mixing tube, which is annularly provided around the mixing tube, communicates with the mixing tube. A side pressure equalizing chamber having a large number of flame ports arranged on the outer peripheral edge is provided, and the fuel gas is supplied from the mixing pipe to both of the pressure equalizing chambers, and the amount of gas supplied to the mixing pipe is reduced from large to small. When changing, is the mixture flow in the above mixing tube turbulent?
Becomes a laminar flow with a flow of Luo upward only, it switches to state the air-fuel mixture is supplied only to the upper equalizing chamber from the state supplied evenly chamber both above the switch point <br / > The gas cooker is characterized in that the temperature is set within the adjustment range of the gas amount adjusting means. 2. The gas cooker according to claim 1, wherein a resistor is detachably provided at the inlet of the upper pressure equalizing chamber. 3. The flame port array 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 port array of the upper pressure equalizing chamber has a smaller amount of combustion by reducing the area of each flame port than the flame port array of the side pressure equalizing chamber. The gas cooker according to any one of 1 to 3.