JPH11287410A - Gas burner device, flow rate regulating method for fuel gas of the same and flow rate regulating device employed for the method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve operability and permit the choking of fuel so as to obtain a small flame without generating a backfire or blow off by a method wherein mixing pipes are communicated with a main flame port and a small flame port respectively and individually. SOLUTION: A burner main body 1 is formed of a cylindrical shape and a multitude of main flame ports 2 are provided in a row in the circumferential direction while a multitude of small flame ports 3, whose flow passage area is sufficiently small, are provided in a row in the circumferential direction below the row of main flame ports 2. Further, the burner main body 1 is provided with a mixing chamber 20 for main flame ports and a mixing chamber 21 for small flame ports while the mixing chamber 20 for main flame ports is communicated with the main flame ports 2 and the mixing chamber 21 for small flame ports is communicated with the small flame ports 3. According to this constitution, flame can be formed differently on the main flame ports 2 and the small flame ports 3 and flames can be formed on both of the main flame port 2 and the small flame ports 3 to effect cooking when a normal cooking is to be effected while the flames can be formed only on the small flame ports 3 upon cooking by small flames whereby small flame performance can be improved and the retaining of the temperature and the like of cooked matters and the like can be effected when the small flame combustion is employed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a Bunsen combustion type gas burner device having improved small fire performance, a method for adjusting a fuel gas flow rate of the gas burner device, and a fuel gas flow rate adjusting device for the gas burner device.

[0002]

2. Description of the Related Art A conventional Bunsen combustion type gas burner apparatus is provided with a large number of flame holes in a burner body, and the fuel gas is supplied from one mixing pipe to the large number of flame holes. By the way, in recent years, a small fire performance for minimizing a flame has been required in order to keep a temperature so as not to cause evaporation or burning of water. However, in the above-described structure, the amount of fuel gas supplied to the mixing pipe was reduced as much as possible and adjusted to be as small as possible so that the flames of the plurality of flame holes did not blow out.

[0003]

However, when the flames of the above-mentioned large number of flame holes are squeezed as small as possible, the flame becomes invisible and the operability of the squeezing operation is deteriorated. If it is too small, there is a problem that flashback and blowout easily occur. The present invention aimed at short flames and low NO _X reduction at high air ratio has a problem that can not be maintained the combustion state of small fire.

SUMMARY OF THE INVENTION The present invention has been made in view of the above description, and has a good operability and a gas burner device capable of reducing a small fire so as to prevent a flashback or blowout, and a fuel gas flow rate of the gas burner device. An object of the present invention is to provide an adjusting method and a fuel gas flow rate adjusting device used for the adjusting method.

[0005]

According to a first aspect of the present invention, there is provided a gas burner apparatus comprising: a plurality of main flame holes; a plurality of small flame holes; Mixing pipe for hole 4
The fuel gas is supplied to the main flame mixing pipe 4 and the small flame mixing pipe 5 via the flow control device 6 by separately communicating the small flame mixing pipe 5 with the small flame hole 3. It is characterized by comprising. The fuel gas is supplied to the main flame hole mixing pipe 4 and the small flame hole mixing pipe 5, and the mixed gas obtained by mixing air from the main flame hole mixing pipe 4 and the small flame hole mixing pipe 5 is supplied to the main flame hole 2.
The flame can be formed in the main flame hole 2 and the small flame hole 3 by being supplied to the small flame hole 3 and discharged from the main flame hole 2 and the small flame hole 3. Mixing tube 4 for main flame hole when cooking small fire
The fuel gas is supplied only to the small-flame-hole mixing tube 5 without supplying the fuel gas to the small-flame-hole mixing tube 5, and the mixed gas obtained by mixing air from the small-flame-hole mixing tube 5 is supplied only to the small-flame hole 3. A flame can be formed in the small flame holes 3 by discharging from the holes 3.
As a result, a flame can be formed only by the small flame holes 3 and a small flame can be formed with a large flame as compared with the conventional method in which a large number of flame holes are squeezed. Operability can be improved and flashback and blowout can be prevented. It can also maintain the combustion state of the small fire those with a high air ratio aimed at short flames and low NO _X reduction.

According to a second aspect of the present invention, there is provided a method for adjusting a flow rate of a fuel gas in a gas burner apparatus, wherein a plurality of main flame holes and a plurality of small flame holes are provided in a burner body, and the main flame holes are provided in the main flame holes. The main flame port mixing pipe 4 is connected to the small flame port 3 separately from the small flame port mixing pipe 5, and the main flame port mixing pipe 4 and the small flame port mixing pipe 5 are respectively connected via the flow control device 6. In the gas burner device, the fuel gas is supplied to the small flame hole mixing pipe 5 when the flow rate is reduced to the minimum by the flow rate adjusting device 6, and the flow rate is adjusted by the flow rate adjusting device 6. The fuel gas is supplied such that the amount of fuel gas supplied to the main flame mixing pipe 4 and the small flame mixing pipe 5 gradually increases as the pressure is gradually reduced from the minimum value. When the flow rate is reduced to the minimum by the flow rate adjusting device 6, the fuel gas is supplied only to the small flame hole mixing pipe 5, and combustion is performed with the smallest flame in the small flame hole 3. The fuel gas is supplied to the small flame hole mixing pipe 5 and the main flame hole mixing pipe 4 to form a flame also in the main flame hole 2 and the flames of the small flame hole 3 and the main flame hole 2 are gradually reduced. Can be larger. Thereby, it is possible to easily and freely adjust over a wide range from a small fire to a large fire, and a high turndown ratio can be obtained.

According to a third aspect of the present invention, there is provided a method for adjusting a flow rate of a fuel gas in a gas burner apparatus, wherein a plurality of main flame holes 2 and a plurality of small flame holes 3 are provided in a burner main body 1, and the main flame holes 2 are mainly provided. The mixing pipes 4 for the flame holes are individually connected to the mixing pipes 5 for the small flame holes with the small flame holes 3, respectively. In the gas burner device configured to supply the fuel gas, when the flow rate is reduced to the minimum by the flow rate control device 6, the minimum flow rate of the fuel gas is supplied to the small flame hole mixing pipe 5, and the flow rate is controlled by the flow rate control device 6. The fuel gas is supplied so that the amount of fuel gas supplied to the small flame hole mixing pipe 5 is gradually increased as it is gradually opened from the state of being reduced to the minimum, and the amount of fuel gas supplied to the small flame hole mixing pipe 5 is reduced. From the maximum state, the fuel gas supplied to the main flame mixing pipe 4 gradually decreases. And supplying the fuel gas to obtain. When the flow rate is reduced to the minimum by the flow rate adjusting device 6, the fuel gas is supplied only to the small flame hole mixing pipe 5, and combustion is performed with the smallest flame in the small flame hole 3. The fuel gas supplied to the small-flame-hole mixing pipe 5 is increased as the flow rate is increased, so that the flame in the small-flame hole 3 can be gradually increased. As the flow rate is increased in step 6, a flame is formed in the main flame hole 2 and this flame can be gradually increased. Thereby, it is possible to easily and freely adjust over a wide range from a small fire to a large fire, and a high turndown ratio can be obtained.

According to a fourth aspect of the present invention, there is provided a fuel gas flow control device for a gas burner device, comprising a gas inlet chamber 8 communicating with a gas inlet 7, and a main gas outlet chamber 10 communicating with a main gas outlet 9.
And the small fire gas outlet chamber 1 communicating with the small fire gas outlet 11
2 are arranged linearly in the above order, and valve seats 13 and 14 are provided between the gas inflow chamber 8 and the main gas outflow chamber 10 and between the main gas outflow chamber 10 and the small fire gas outflow chamber 12, respectively. Gas inflow chamber 8, main gas outflow chamber 10, and small fire gas outflow chamber 12
The adjustment shaft 15 is inserted so as to penetrate the valve seat 13 so as to be reciprocable.
Valves 16 and 1 that open and close the flow path in proximity to and away from
7 is provided on the adjusting shaft 15 so as to correspond to the respective valve seats 13 and 14, and a small fire gas supply passage 18 for constantly communicating the gas inflow chamber 8 and the small fire gas outflow chamber 12 is provided on the adjusting shaft 15. It is characterized by being provided. When the adjusting shaft 15 is positioned so as to minimize the flow rate, the gas inflow chamber 8 and the small fire gas outflow chamber 12 communicate with each other only through the small fire gas supply path 18. Can be supplied to the small fire gas outlet 11. When the adjustment shaft 15 is moved from this state to the side where the flow rate is increased, the valve seats 13 and 14 and the valve section 1 are moved.
6 and 17, the fuel gas is supplied to the small fire gas outlet chamber 12 and the main gas outlet chamber 10, and the flow rate of the fuel gas is gradually increased. Fuel gas can be supplied to the outlet 9 so that the flow rate gradually increases. Thereby, only the reciprocating operation of the adjusting shaft 15 is required.
The fuel gas can be adjusted and supplied as in the method of adjusting the flow rate of the fuel gas.

According to a fifth aspect of the present invention, there is provided a fuel gas flow control device for a gas burner device, comprising a gas inlet chamber 8 communicating with a gas inlet 7, and a small fire gas outlet chamber 12 communicating with a small fire gas outlet 11. And the main gas outlet chamber 1 communicating with the main gas outlet 9
0 are arranged linearly in the above order, and valve seats 13, 14 are provided between the gas inflow chamber 8 and the small fire gas outflow chamber 12 and between the small fire gas outflow chamber 12 and the main gas outflow chamber 10, respectively. The adjusting shaft 15 is inserted through the gas inflow chamber 8, the small fire gas outflow chamber 12, and the main gas outflow chamber 10.
Is reciprocally movable, and the valve seat 1 is reciprocated by the adjusting shaft 15.
Valve unit 1 that opens and closes the flow path in proximity to and away from 3, 14
6 and 17 are provided on the adjustment shaft 15 so as to correspond to the respective valve seats 13 and 14, and the gas inflow chamber 8 and the small fire gas outflow chamber 1 are provided.
And a small fire gas supply passage 18 which constantly communicates with the adjusting shaft 1
5 is provided. When the adjusting shaft 15 is positioned so as to minimize the flow rate, the gas inflow chamber 8 and the small fire gas outflow chamber 12 communicate with each other only through the small fire gas supply path 18. Can be supplied to the small fire gas outlet 11. When the adjustment shaft 15 is moved from this state to the side where the flow rate increases, the valve seat 13 and the valve portion 1 are moved.
6, the fuel gas is supplied to the small fire gas outflow chamber 12 and the flow rate of the fuel gas gradually increases, and the fuel gas is supplied to the small fire gas outlet 11 so that the flow rate gradually increases. Can supply. When the maximum flow rate is supplied to the small fire gas outlet 11, the space between the valve seat 14 and the valve portion 17 gradually opens, so that the fuel gas is supplied to the main gas outflow chamber 10 and the fuel gas is discharged. And the fuel gas can be supplied to the main gas outlet 9 so that the flow rate gradually increases. Thus, the fuel gas can be adjusted and supplied only by the reciprocating operation of the adjusting shaft 15 as in the method for adjusting the flow rate of the fuel gas according to the third aspect.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Burner body 1 of gas burner device A
In the case of the present example, the main flame holes 2 are formed in a circle as shown in FIG. The holes 3 are arranged in the circumferential direction. The main flame hole 2 and the small flame hole 3 have a sufficiently small flow passage area of the small flame hole 3 than the flow passage area of the main flame hole 2. A mixing chamber 20 for the main flame hole and a mixing chamber 21 for the small flame hole are provided in the burner main body 1. The mixing chamber 20 for the main flame hole communicates with the main flame hole 2 and the mixing chamber for the small flame hole. 21 communicates with the small flame hole 3. The burner main body 1 is provided with a mixing pipe 4 for the main flame hole and a mixing pipe 5 for the small flame hole, and the mixing pipe 4 for the main flame hole communicates with the mixing chamber 20 for the main flame hole and the small flame hole. The mixing pipe 5 communicates with the mixing chamber 21 for small flame holes. A nozzle 23 for the main flame hole is provided at the base of the mixing tube 4 for the main flame hole, and a nozzle 22 for the small flame hole is provided at the base of the mixing tube 5 for the small flame hole. When the fuel gas is supplied to the main flame hole nozzle 23 and the fuel gas is discharged from the main flame hole nozzle 23 to the main flame hole mixing tube 4, the primary gas flows from the base of the main flame hole mixing tube 4. The air is sucked in, the primary air and the fuel gas are mixed in the main flame hole mixing pipe 4 and supplied to the main flame hole mixing chamber 20, and the air is discharged from the main flame hole 2 through the main flame hole mixing chamber 20. The mixed fuel gas is ejected, and a flame is formed in the main flame hole 2. When the fuel gas is supplied to the small flame hole nozzle 22 and the fuel gas is discharged from the small flame hole nozzle 22 to the small flame hole mixing tube 5, the primary air is discharged from the base of the small flame hole mixing tube 5. The primary air and the fuel gas are mixed in the small flame hole mixing pipe 5 and supplied to the small flame hole mixing chamber 21, and the air is mixed from the small flame hole 3 through the small flame hole mixing chamber 21. The fuel gas is ejected to form a flame in the small flame holes 3. By doing in this way, a flame can be formed separately in the main flame hole 2 and the small flame hole 3, and when performing normal cooking, a flame is formed in both the main flame hole 2 and the small flame hole 3. When a small fire is used, cooking can be performed by forming a flame only in the small flame hole 3, and when a small fire is used, the small fire performance can be improved to keep the food warm.

When the fuel gas is supplied to the main flame hole nozzle 23 and the small flame hole nozzle 22, as shown in FIG. The flow control device 6 is configured as shown in FIG. 3, for example. A safety valve 24 is disposed on the supply side of the gas inlet 7 of the fuel gas of the flow rate adjusting device 6, and when the flame of the main flame hole 2 or the small flame hole 3 is extinguished, the safety valve 24 is shut off to supply gas. It is designed to be shut off. In other words, a thermocouple is disposed on the outer periphery of the burner main body 1. When the thermocouple senses the temperature of combustion, the open state of the safety valve 24 is maintained by the thermoelectromotive force, and the combustion extinguishes to reduce the temperature. Safety valve 2 when no longer sensed
4 is cut off.

The structure of the flow control device 6 shown in FIG. 3 is as follows. In the housing 25, the gas inflow chamber 8, the main gas outflow chamber 10, and the small fire gas outflow chamber 12 are linearly arranged in order from the left. The gas inflow chamber 8 is in communication with the gas inlet 7, and gas is supplied from the safety valve 24 to the gas inflow chamber 8 via the gas inlet 7. The main gas outlet chamber 10 communicates with the main gas outlet 9 and the main gas flow chamber 1
The fuel gas can be supplied from 0 to the main flame hole nozzle 23 through the main gas outlet 9. The small fire gas outlet chamber 12 communicates with the small fire gas outlet 11 so that the fuel gas can be supplied from the small fire gas outlet chamber 12 to the small flame hole nozzle 22 through the small fire gas outlet 11. It has become.
A valve seat 13 is provided between the gas inflow chamber 8 and the main gas outflow chamber 10, and the main gas outflow chamber 10 and the small fire gas outflow chamber 12 are provided.
And a valve seat 14 is provided therebetween. And the gas inflow chamber 8,
The adjusting shaft 15 is inserted through the main gas outlet chamber 10 and the small fire gas outlet chamber 12 so that the adjusting shaft 15 can reciprocate freely.
Valve portions 16 and 17 for opening and closing the flow path are provided on the adjustment shaft 15 so as to correspond to the respective valve seats 13 and 14. An O-ring 26 is provided on the outer periphery of the adjustment shaft 15.
Is mounted, and a seal is provided between the adjustment shaft 15 and the housing 25. Further, the small shaft gas supply passage 1 which always connects the gas inflow chamber 8 and the small fire gas outflow chamber 12 to the adjusting shaft 15.
A small fire gas orifice 27 is formed in the small fire gas supply passage 18.

In the state shown in FIG. 3, the valve seats 13 and 14 are closed by the valve portions 16 and 17 with the adjusting shaft 15 moved to the leftmost position. Only the fuel gas having the minimum flow rate defined by the small fire gas orifice 27 flows into the small fire gas outlet chamber 12. As a result, no fuel gas is supplied to the main flame hole 2 side, and the small flame hole 3
Only the fuel gas is supplied in a state of being minimized. When the adjustment shaft 15 is gradually moved to the right from this state, the valve seats 13 and 14 are opened, fuel gas starts flowing into the main gas outflow chamber 10 and the small fire gas outflow chamber 12, and the adjustment shaft 15 is further moved to the right. When moved, the main gas outflow chamber 10 and the small fire gas outflow chamber 12
The flow rate of the gas flowing through increases to the maximum flow rate.
Thereby, the fuel gas is supplied to the main flame hole 2 and the small flame hole 3, and the flow rate of the supplied fuel gas gradually increases. This state is graphically shown in FIG. In FIG. 4, the closed state is a state in which the flow rate is reduced by moving the adjustment shaft 15 to the left, and the open state is a state in which the flow rate is increased by moving the adjustment shaft 15 to the right.
With the movement of the adjustment shaft 15, the gas flow rate for the small flame hole changes as shown by the symbol a in FIG.
, And the total gas flow rate changes as shown by reference numeral c in FIG. At the minimum throttle flow rate of the fuel gas, the combustion continues at the small flame hole 3 at the gas flow rate specified by the small fire gas orifice 27, and the main flame hole 2 is extinguished. That is, when the fuel gas is squeezed to the minimum flow rate in a state where both the main flame hole 2 and the small flame hole 3 are burned, the minimum flow rate becomes large in order to prevent the backfire or the blowout of the small fire, and the main flame hole becomes large. When a flame is formed in all the flame holes 2 and the small flame holes 3, the situation in which the flame is present becomes invisible and the operability becomes problematic. However, in the present invention, since the flame is formed only in the small flame holes 3, the above-mentioned adverse effect is caused. Does not occur, the minimum flow rate of the fuel gas can be reduced, and the operability can be improved. Further, a large throttle of the gas burner device A having the main flame hole 2 and the small flame hole 3 can be realized only by the reciprocating operation of the operation shaft 15 of the one flow control device 6, and the gas burner device A can be manufactured at low cost and with good operability.

FIG. 5 shows another example of the flow control device 6. The gas inflow chambers 8 are arranged in the housing 25 in order from the left.
The small fire gas outflow chamber 12 and the main gas outflow chamber 10 are linearly arranged. The gas inflow chamber 8 is in communication with the gas inlet 7, and gas is supplied from the safety valve 24 to the gas inflow chamber 8 via the gas inlet 7. The main gas outlet chamber 10 communicates with the main gas outlet 9 and the main gas outlet chamber 10
The fuel gas can be supplied to the main flame hole nozzle 23 from the main gas outlet 9 through the main gas outlet 9. Gas fire chamber 1 for small fire
Numeral 2 communicates with the small fire gas outlet 11 so that fuel gas can be supplied from the small fire gas outlet chamber 12 to the small flame hole nozzle 22 through the small fire gas outlet 11. A valve seat 13 is provided between the gas inflow chamber 8 and the small fire gas outflow chamber 12.
A small fire gas outflow chamber 12 and a main gas outflow chamber 1
0 is provided with a valve seat 14. The adjusting shaft 15 is inserted through the gas inflow chamber 8, the small fire gas outflow chamber 12, and the main gas outflow chamber 10 so that the adjusting shaft 15 can reciprocate. The valve seat 13,
Valves 16 and 1 that open and close the flow path in proximity to and away from
7 is provided on the adjustment shaft 15 so as to correspond to the respective valve seats 13 and 14. An O-ring 26 is mounted on the outer periphery of the adjustment shaft 15 to seal between the adjustment shaft 15 and the housing 25. The adjusting shaft 15 is provided with a small fire gas supply passage 18 for constantly communicating the gas inflow chamber 8 and the small fire gas outflow chamber 12. A small fire gas orifice 27 is provided in the small fire gas supply passage 18. It is formed.

In the state shown in FIG. 5, the valve seats 13 and 14 are closed by the valve portions 16 and 17 with the adjustment shaft 15 moved to the leftmost position. Only the fuel gas having the minimum flow rate defined by the small fire gas orifice 27 flows into the small fire gas outlet chamber 12. As a result, no fuel gas is supplied to the main flame hole 2 side, and the small flame hole 3
Only the fuel gas is supplied in a state of being minimized. When the adjustment shaft 15 is gradually moved to the right from this state, the valve seat 13 is opened, fuel gas starts flowing into the small fire gas outflow chamber 12, and when the adjustment shaft 15 is further moved to the right, the small fire gas is released. The flow rate of the gas flowing to the outflow chamber 12 increases to the maximum flow rate supplied to the small flame holes 3. When the adjusting shaft 15 is further moved to the right, the valve seat 14 starts to open and the small fire gas outflow chamber 1
2 flows into the main gas outflow chamber 10 and the flow rate gradually flowing into the main gas outflow chamber 10 increases. The small flame hole 3
In a state where the flow rate of the fuel gas supplied to the small flame holes 3 is gradually increased and the flow rate of the fuel gas supplied to the small flame holes 3 is maximized, the supply of the fuel gas to the main flame holes 2 is gradually started. The flow rate of the fuel gas supplied to the fuel cell 2 increases. FIG. 6 is a graph showing this state. In FIG. 6, the closed shaft is the adjustment shaft 15.
Is moved to the left to reduce the flow rate.
5 is moved to the right to increase the flow rate. Adjustment axis 1
By the movement of No. 5, the gas flow rate for the small flame hole changes as shown by the symbol d in FIG. 6, and the gas flow rate for the main flame hole becomes the symbol e in FIG.
, And the total gas flow rate changes as shown by the symbol f in FIG.

FIG. 7 shows another example of the flow control device 6. In the present embodiment, the same operation as the flow control device 6 shown in FIG.
A gas passage 29 for the main flame hole and a gas passage 30 for the small flame hole are provided in the rotatably driven closing member 28 over a predetermined angular range in the circumferential direction, but are smaller than the gas passage 29 for the main flame hole. The flame hole gas passage 30 is provided in a larger angular range in the circumferential direction. At the time of ignition, the gas passage 29 for the main flame hole and the gas passage 30 for the small flame hole are simultaneously opened. However, when the gas flow rate is reduced, the gas passage for the small flame hole is closed even if the gas passage 29 for the main flame hole is closed. The fuel gas for small fire flows from the end passage 30 'at the end of the end 30.

[0017]

According to the first aspect of the present invention, a plurality of main flame holes and a plurality of small flame holes are provided in the burner main body, and the main flame hole mixing pipe is provided in the small flame hole. The mixing pipes for the main flame holes are separately connected to each other, and the fuel gas is supplied to the mixing pipes for the main flame holes and the mixing holes for the small flame holes, respectively, via the flow rate adjusting device. The fuel gas is supplied to the pipe and the small flame port mixing pipe, and the mixed gas obtained by mixing air from the main flame port mixing pipe and the small flame port mixing pipe is supplied to the main flame port and the small flame port. It is possible to form a flame in the main flame hole and the small flame hole by discharging from the hole and the small flame hole, and when cooking the small fire, do not supply the fuel gas to the main flame hole mixing pipe, The fuel gas is supplied only to the small flame hole mixing pipe, and the mixed gas obtained by mixing air from the small flame hole mixing pipe is supplied only to the small flame hole to cause a small fire. It is possible to form a flame in a small flame hole by discharging from a hole, thereby forming a flame with only the small flame hole and producing a small flame with a large flame compared to the conventional method of squeezing the flame of many flame holes. can, is intended can be made so that there is no backfire or blow-off it is possible to improve the operability of the small fire, also the combustion state of even those aimed at short flames and low nO _X reduction at high air ratio small fire It can be maintained.

According to a second aspect of the present invention, when the flow rate is reduced to a minimum by the flow rate adjusting device, the fuel gas having the minimum flow rate is supplied to the mixing pipe for the small flame hole, and the flow rate is minimized by the flow rate adjusting device. Since the fuel gas is supplied so that the amount of fuel gas supplied to the main flame hole mixing pipe and the small flame hole mixing pipe gradually increases from the state of being gradually narrowed down, the flow rate is reduced to a minimum by the flow rate adjusting device. At that time, the fuel gas is supplied only to the small flame hole mixing pipe, and the small flame hole burns with the smallest flame,
From this state, as the flow rate is increased by the flow control device, fuel gas is supplied to the small flame hole mixing pipe and the main flame hole mixing pipe to form a flame also in the main flame hole, and the small flame hole and the main flame hole are formed. The flame can be gradually increased, can be easily and freely adjusted over a wide range from a small fire to a large fire, and a high turndown ratio can be obtained.

According to a third aspect of the present invention, when the flow rate is reduced to a minimum by the flow rate adjusting device, the fuel gas having the minimum flow rate is supplied to the mixing pipe for the small flame hole, and the flow rate is minimized by the flow rate adjusting device. The fuel gas is supplied such that the amount of fuel gas supplied to the small flame hole mixing pipe gradually increases as the aperture is gradually opened from the state where the throttle valve is opened, and the amount of fuel gas supplied to the small flame hole mixing pipe becomes maximum. The fuel gas is supplied so that the fuel gas supplied to the main flame hole mixing pipe gradually increases from the state where the fuel gas is supplied.When the flow rate is reduced to the minimum by the flow control device, the fuel gas is supplied only to the small flame hole mixing pipe. Then, the combustion is performed with the smallest flame in the small flame hole, and in this state, the fuel gas supplied to the small flame hole mixing pipe is increased as the flow rate is increased by the flow control device, and the flame in the small flame hole is gradually increased. To minimize flames from small flame holes. The flame can be formed in the main flame hole and the flame can be gradually increased as the flow rate is further increased by the flow rate adjusting device from the state described above, and it can be easily and freely over a wide range from a small fire to a large fire. It can be adjusted and a high turndown ratio can be obtained.

According to a fourth aspect of the present invention, there is provided a gas inflow chamber communicating with a gas inlet, a main gas outflow chamber communicating with a main gas outlet, and a small fire gas outflow chamber communicating with a small fire gas outlet. Are linearly arranged in the above order, and valve seats are provided between the gas inflow chamber and the main gas outflow chamber and between the main gas outflow chamber and the small fire gas outflow chamber, respectively. The adjusting shaft is inserted so as to penetrate the outflow chamber and the small fire gas outflow chamber so that the adjusting shaft can reciprocate freely, and the reciprocating motion of the adjusting shaft approaches and separates from the valve seat to open and close the flow path. A valve portion is provided on the adjusting shaft so as to correspond to each of the above-mentioned valve seats, and a small fire gas supply passage for constantly communicating the gas inflow chamber and the small fire gas outflow chamber is provided on the adjusting shaft. When the adjustment shaft is located at the minimum position, the gas inflow chamber and the small fire gas outflow chamber When the adjustment shaft is moved from this state to the side where the flow rate increases, the gap between the valve seat and the valve portion gradually opens, and fuel gas is supplied to the small fire gas outflow chamber and the main gas outflow chamber. In addition, the flow rate of the fuel gas is gradually increased, and the fuel gas can be adjusted and supplied only by the reciprocating operation of the adjusting shaft, as in the method for adjusting the flow rate of the fuel gas according to the second aspect.

According to a fifth aspect of the present invention, there is provided a gas inflow chamber communicating with a gas inlet, a small fire gas outflow chamber communicating with a small fire gas outlet, and a main gas outflow chamber communicating with a main gas outlet. Are arranged linearly in the above order, and a valve seat is provided between the gas inflow chamber and the small fire gas outflow chamber and between the small fire gas outflow chamber and the main gas outflow chamber, respectively, the gas inflow chamber, The adjustment shaft is inserted so as to penetrate the small fire gas outflow chamber and the main gas outflow chamber, and the adjustment shaft is reciprocally movable. Since the valve portion that opens and closes is provided on the adjustment shaft so as to correspond to each of the valve seats described above, and the small fire gas supply passage that constantly connects the gas inflow chamber and the small fire gas outflow chamber is provided on the adjustment shaft, When the adjustment shaft is located at the state where the flow rate is minimized, the gas inflow chamber and the small fire gas outflow chamber supply small fire gas. When the adjustment shaft is moved to the side where the flow rate increases from this state, the space between the valve seat and the valve section gradually opens, and fuel gas is supplied to the small fire gas outflow chamber and fuel gas is supplied. Gradually increases, and when the maximum flow rate is supplied to the small fire gas outlet, the space between the valve seat and the valve section gradually opens, and the fuel gas is supplied to the main gas outflow chamber. At the same time, the flow rate of the fuel gas gradually increases, and the fuel gas can be adjusted and supplied only by the reciprocating operation of the adjusting shaft, as in the fuel gas flow rate adjusting method according to the third aspect.

[Brief description of the drawings]

FIG. 1 shows a gas burner device according to an embodiment of the present invention, wherein (a) is a perspective view and (b) is a sectional view.

FIG. 2 is an explanatory diagram showing a system of the gas burner device according to the first embodiment;

FIG. 3 is a cross-sectional view of the flow rate adjusting device.

FIG. 4 is a graph illustrating adjustment of the flow rate adjusting device according to the first embodiment.

FIG. 5 is a cross-sectional view showing another example of the flow control device of the above.

FIG. 6 is a graph illustrating adjustment of the flow rate adjusting device according to the first embodiment.

FIG. 7 is a perspective view showing another embodiment of the flow control device according to the present invention;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Burner main body 2 Main flame hole 3 Small flame hole 4 Mixing tube for main flame hole 5 Mixing tube for small flame hole 6 Flow control device 7 Gas inlet 8 Gas outflow chamber 9 Main gas outlet 10 Main gas outflow chamber 11 Small fire gas Outlet 12 Small fire gas outflow chamber 13 Valve seat 14 Valve seat 15 Adjusting shaft 16 Valve section 17 Valve section 18 Small fire gas supply path

Claims (5)

[Claims] A burner main body is provided with a plurality of main flame holes and a plurality of small flame holes, and the main flame hole mixing tube and the small flame hole mixing tube are separately provided in the small flame holes. A gas burner device which is communicated and supplies fuel gas to a main flame hole mixing tube and a small flame hole mixing tube via a flow control device, respectively. 2. A plurality of main flame holes and a plurality of small flame holes are provided in a burner main body, and a main flame hole mixing tube is separately provided in the main flame hole and a small flame hole mixing tube is separately provided in the small flame hole. In the gas burner device which is communicated with each other to supply the fuel gas to the main flame hole mixing pipe and the small flame hole mixing pipe via the flow rate adjusting device,
When the flow rate is reduced to the minimum by the flow control device, the fuel gas of the minimum flow rate is supplied to the mixing pipe for the small flame hole, and the mixing for the main flame hole is gradually opened from the state where the flow rate is reduced to the minimum by the flow control device. A method for adjusting a flow rate of a fuel gas in a gas burner device, wherein the fuel gas is supplied such that the amount of the fuel gas supplied to a pipe and a mixing pipe for a small flame hole gradually increases. 3. A plurality of main flame holes and a plurality of small flame holes are provided in the burner main body, and the main flame hole mixing tube and the small flame hole mixing tube are separately provided in the small flame holes. In the gas burner device which is communicated with each other to supply the fuel gas to the main flame hole mixing pipe and the small flame hole mixing pipe via the flow rate adjusting device,
When the flow rate is reduced to the minimum by the flow rate control device, the fuel gas with the minimum flow rate is supplied to the small flame hole mixing pipe, and the small flow rate mixing device is gradually opened from the state where the flow rate is reduced to the minimum by the flow rate control device. The fuel gas is supplied to the main flame mixing pipe from the state where the fuel gas is supplied so that the fuel gas supplied to the pipe gradually increases and the fuel gas supplied to the small flame mixing pipe is maximized. A method for adjusting a flow rate of a fuel gas in a gas burner device, wherein the fuel gas is supplied such that the fuel gas gradually increases. 4. A gas inflow chamber communicating with a gas inlet, a main gas outflow chamber communicating with a main gas outlet, and a small fire gas outflow chamber communicating with a small fire gas outlet are linearly arranged in the above order. ,
Valve seats are provided between the gas inflow chamber and the main gas outflow chamber and between the main gas outflow chamber and the small fire gas outflow chamber, respectively. The adjustment shaft is inserted so as to penetrate, and the adjustment shaft is reciprocally movable, and the respective valves are provided on the adjustment shafts with valve portions that are close to and separated from the valve seat by the reciprocation of the adjustment shaft to open and close the flow path. A gas supply passage for small fire, which is provided to correspond to the seat, and which always connects the gas inflow chamber and the small fire gas outflow chamber to the adjustment shaft. . 5. A gas inflow chamber communicating with a gas inlet, a small fire gas outflow chamber communicating with a small fire gas outlet, and a main gas outflow chamber communicating with a main gas outlet are linearly arranged in the above order. ,
Valve seats are provided between the gas inflow chamber and the small fire gas outflow chamber and between the small fire gas outflow chamber and the main gas outflow chamber, respectively. The adjusting shaft is inserted into the chamber so as to penetrate the chamber, and the adjusting shaft is reciprocally movable. A gas supply passage for small fire, which is provided so as to correspond to the valve seat of (1), and which always connects the gas inflow chamber and the small fire gas outflow chamber to the adjustment shaft, is provided.