TW201632795A - Gas stove - Google Patents

Abstract

The subject of the present invention is to provide a gas stove with a burner having a main burner portion and a secondary burner portion, in which no matter the inlet of which one of the mixing tubes used by the main burner portion or the secondary burner portion blows the flame, a single heat sensor can be used to detect such a situation, so as to prevent the top plate from abnormal overheating. The solution is to have the opening direction of the inlets of the two mixing tubes used by the secondary burner portion and the main burner portion configured as the X-axis direction, and the arrangement direction of the two mixing tubes as the Y-axis direction; and, setting the side of the mixing tube used by the secondary burner portion as one edge in the Y-axis direction, and the side of the mixing tube used by the main burner portion as the other edge in the Y-axis direction; and, configuring a shared heat insulation plate inside a stove body, which crosses the predetermined position in the X-axis direction and covers the inlets of the two mixing tubes from the top toward the projection space on the outer side in the X-axis direction, and a drooping plate portion bent downwardly on the side edge of one side of the heat insulation plate in the Y-axis direction. In addition, the single heat sensor is disposed under the heat insulation plate and located further higher than the center height of the inlets of the two mixing tubes.

Description

Gas stove Field of invention

The present invention relates to a gas burner comprising a burner having a main burner portion and a sub-combustor portion having a smaller rated combustion than the main burner portion.

Background of the invention

Conventionally, in such a gas furnace, the mixing tube for the main burner portion and the mixing tube for the sub-combustion portion are arranged side by side in the furnace body covered with the top plate so that the flow inlets of the upper ends of the two mixing tubes face each other. Direction opening (refer to, for example, Patent Document 1).

However, in the gas stove, if the cooking water overflows and the flame hole of most of the burner is blocked by the soup that overflows, the flame will flow back in the mixing tube of the burner, and the flame is mixed by the mixing tube. The situation where the inflow is blown out. Therefore, it has been known that there is a configuration in which a burner having no burner portion of the main unit is provided, but a heat-sensitive element is disposed facing the inlet of the mixing tube to be heated by the flame from the inflow port. When the element detects this, the supply of gas to the burner is stopped (see, for example, Patent Document 2).

However, even if the heat sensing element is provided as described above, after the flame is blown out It takes some time until this condition is detected, so there is a case where the top plate is abnormally overheated due to the flame blown during this time. Further, in the burner having the burner portion of the main burner, the flame is blocked by the flame hole of the main burner portion, and the flame is blown out from the inlet of the main burner portion mixing pipe, and the sub-burner portion is The flame hole is blocked to cause the flame to be blown out from the sub-burner portion through the inlet of the mixing tube. Therefore, it is conceivable to provide a heat-sensitive element that faces the inlet of the mixing tube for the main burner portion and a heat-sensitive element that faces the inlet of the mixing tube for the sub-combustion unit, but this practice increases the cost.

Prior technical literature Patent literature

Patent Document 1: Japanese Patent Laid-Open Publication No. 2012-107777

Patent Document 2: Japanese Patent Laid-Open Publication No. 2003-28428

Summary of invention

The present invention has been made in view of the above, and it is an object of the invention to provide a single heat-sensitive element capable of detecting whether a flame is blown from an inlet of a mixing tube for a main burner portion and a sub-burner portion. And can prevent the abnormally overheated gas stove of the top plate.

In order to solve the above problems, the present invention is a gas furnace including a burner having a main burner portion and a sub-combustor portion having a rated combustion amount smaller than that of the main burner portion. It is characterized in that it is mainly burned in the furnace body covered by the top plate. The mixing tube for the burner unit and the mixing tube for the sub-combustion unit are arranged side by side so that the inlets of the upstream ends of the two mixing tubes are opened in the same direction, and the opening direction of the inlets of the two mixing tubes is set to In the X-axis direction, the direction away from the inflow port is set to the outer side in the X-axis direction, and the direction close to the inflow port is set to the inner side in the X-axis direction, and the arrangement direction of the two mixing tubes is set to the Y-axis direction, and the sub-burner is used. The mixing tube side is set to the Y-axis direction side, and the main burner portion mixing tube side is set to the other side in the Y-axis direction, and a predetermined position across the X-axis direction is provided in the furnace body to cover the two mixing tubes from above. a common heat insulating plate having a projection space on the outer side in the X-axis direction, and a hanging plate portion bent downward at a side edge on one side in the Y-axis direction of the heat insulating plate, and the single heat-sensitive element is placed at a ratio of two The center of the inlet of the mixing tube is also above the height of the insulation panel.

According to the present invention, regardless of which of the mixing tubes for the main burner portion and the sub-combustion portion is blown, the flame can be prevented from coming into contact with the top plate by the heat insulating plate, and the top plate can be prevented. Abnormal overheating.

Further, when the flame hole of the main burner portion is blocked, the flame blown from the inlet of the mixing tube for the main burner portion is large, and the combustion gas from the flame is spread over the entire width of the heat insulating plate in the Y-axis direction. And flowing along the lower surface of the heat shield toward the outside in the X-axis direction. Therefore, if the heat sensing element is located above the center height of the inlets of the two mixing tubes for the main burner portion and the sub-combustion portion, the combustion gas reaches the heat sensing element, and the mixing from the main burner portion can be detected. The flame of the inlet of the tube is blown out. On the other hand, when the flame hole of the sub-burner portion is blocked, it is mixed by the sub-burner portion. The flame blown from the inlet of the tube is small, and the combustion gas from the flame diffuses in the Y-axis direction under the heat shield to make it difficult to reach the heat-sensitive element. However, in the present invention, since the hanging plate portion provided on the side edge of one side of the heat insulating plate on the one side in the Y-axis direction can prevent the combustion gas from being separated from the side edge of the heat insulating plate, even if the flame is When the sub-burner portion is blown out by the inlet of the mixing tube, the combustion gas can be passed to the heat-sensitive element to detect the blowing of the flame from the inlet of the mixing tube for the sub-combustion unit. Therefore, regardless of which of the mixing tubes of the main burner portion and the sub-combustion unit is blown, the flame can be detected by a single heat-sensitive element, and the cost can be reduced.

However, it is preferable that the heat insulating plate has an upper cover than the sub-burner portion when the inlet of the main burner portion mixing pipe is located outside the inlet of the sub-combustion portion mixing pipe in the X-axis direction. The inlet of the mixing tube is further provided to the plate portion of the main burner portion for the main burner portion that protrudes outward in the X-axis direction, or is provided in the flow of the mixing tube for the sub-combustion portion even if the plate portion is not provided. A hanging plate portion that is bent downward toward the side edge of the other side of the heat insulating plate in the X-axis direction range between the inlet and the inlet port of the mixing tube for the main burner portion. According to this, when a flame is blown out from the inlet of the mixing tube for the sub-combustor portion, it is possible to prevent the combustion gas from being above the projection space formed on the outer side in the X-axis direction from the inlet of the mixing tube for the sub-combustor portion. The side of the other side of the heat shield is separated from the side of the other side in the Y-axis direction, so that the combustion gas easily reaches the heat-sensitive element.

Further, it is preferable that the heat sensitive element is disposed at the center of the inlet of the mixing tube for the sub-combustion unit and the other side of the heat shield in the Y-axis direction When the position of the side edge is in the Y-axis direction, the Y-axis between the side edges of the heat-insulating plate on the outer side in the X-axis direction is provided at least between the side where the heat-sensitive element is disposed and the side edge of the heat-insulating plate in the Y-axis direction. The direction of the range is bent downward to lower the plate. According to this, when a flame is blown out from the inlet of the mixing tube for the sub-burner portion, the combustion gas which causes the outer side of the heat insulating plate to flow outward in the X-axis direction can be prevented from being outside the X-axis direction of the heat insulating plate. The end edge is detached to the upper side, so that the combustion gas easily reaches the heat sensitive element.

Further, as the heat sensitive element, a thermistors can be used. Here, since the thermistor can detect the temperature change with good responsiveness, regardless of whether the thermistor is disposed on the side edge from the side of the Y-axis direction of the heat shield plate to any Y-axis of the side edge of the other side in the Y-axis direction In the directional position, not only the blowing of the flame from the inlet of the mixing tube for the main burner portion but also the blowing of the flame from the inlet of the mixing tube for the sub-combustion unit can be detected with good responsiveness. Further, the thermistor is inserted and fixed by the hanging plate portion of the side edge of the heat insulating plate on the one side in the Y-axis direction or the hanging plate portion bent downward at the side edge of the other side of the heat insulating plate in the Y-axis direction. It is possible to arrange the lead wire connected to the thermistor on the outer side of the hanging plate portion, and it is possible to prevent the lead wire from being exposed to the high-temperature combustion gas by hanging down the plate portion.

Further, at this time, it is preferable that the upper surface of the heat shield is formed with a ridge extending in the Y-axis direction from the portion in which the thermistor is inserted and fixed to the lower plate portion. . According to this, even if the boiled soup falls to the inner side of the heat shield in the X-axis direction, the soup that has been boiled does not flow to the outside of the X-axis than the ridge. Mindian The portion of the fixed lower hanging plate portion is prevented from being inserted, thereby preventing the boiled soup from dripping to the lead connected to the thermistor.

Further, a bimetal switch or a thermal fuse may be used as the heat sensitive element. However, since the temperature detection of the bimetal switch and the thermal fuse is not as responsive as the thermistor, when it is disposed at one side or the other side of the Y-axis direction of the heat shield, the mixing tube for the autonomous burner portion is used in the future. It takes a lot of time before the blow-out of the flame at the inlet of the mixing tube in the sub-burner portion in the Y-axis direction away from the arrangement position of the bimetal switch and the thermal fuse is detected. Therefore, it is preferable to arrange the bimetal switch or the thermal fuse at a position in the Y-axis direction between the center of the inlet of the mixing tube for the sub-combustor portion and the center of the inlet of the mixing tube for the main burner portion.

1‧‧‧ Burner (Auxiliary Burner Division)

11‧‧‧Ignition plug

12‧‧‧ thermocouple

2‧‧‧Deputy Burner Division

21‧‧‧Multi-burner mixing tube

21a, 31a‧‧‧ entrance

21b‧‧‧Inner tube

22, 32‧‧‧ gas supply pipe

22a, 32a‧‧‧ gas nozzle

23, 33‧‧‧ cover

23a, 33a‧‧‧ nozzle insertion hole

23b, 33b‧‧‧One air hole

24, 34‧‧‧ damper panels

25‧‧‧Sub burner main body

26‧‧‧Sub burner cover

27‧‧‧Sub burner flame hole

3‧‧‧Main burner unit

31‧‧‧Mixed tube for main burner

31b‧‧‧Outer tube

35‧‧‧Main burner body

35a‧‧‧Access Department

36‧‧‧Main burner cover

37‧‧‧Main burner flame hole

4‧‧‧ top board

41‧‧‧ burner opening

42‧‧‧ cushion

42a‧‧‧ drip department

43‧‧‧Cover

44‧‧‧fire frame

44a‧‧‧Fireclaw claws

5‧‧‧ furnace body

51‧‧‧burner support

6‧‧‧ Thermal insulation board

61‧‧‧Down plate section placed on the side edge of the Y-axis side

62‧‧‧Down plate section placed at the outer edge of the X-axis direction

63‧‧‧Down plate section placed on the side of the other side of the Y-axis direction

64‧‧‧ 突条

65‧‧‧ The other side of the Y-axis direction of the portion of the heat insulating plate that exists in the X-axis direction range between the inlet of the mixing tube for the sub-combustion unit and the inlet of the mixing tube for the main burner portion Side plate

7‧‧‧Thermistor (heat sensing element)

7'‧‧‧Bimetal switch (heat sensing element)

71‧‧‧Leader

71a‧‧‧heat-resistant coating

X, Y‧‧ direction

Fig. 1 is a cutaway sectional view showing a burner arrangement portion of a gas burner according to a first embodiment of the present invention.

Fig. 2 is a perspective view of an important part including a burner of the gas furnace of the first embodiment as seen obliquely to the right front.

Fig. 3 is a perspective view of an important portion including a burner of the gas furnace of the first embodiment as seen obliquely from the front left side.

Fig. 4 is a plan view showing a heat insulating plate arrangement portion of the gas burner of the first embodiment.

Fig. 5 is a front elevational view showing a heat insulating plate arrangement portion of the gas burner of the first embodiment.

Fig. 6 is an important part of a gas burner including a burner of the first embodiment; A perspective view of the exploded state.

Fig. 7 is a perspective view of an important portion including a burner of the gas furnace of the second embodiment as seen obliquely to the right front.

Fig. 8 is a perspective view of an important portion including a burner of the gas furnace of the second embodiment as seen obliquely from the front left side.

Fig. 9 is a plan view showing a heat insulating plate arrangement portion of a gas burner according to a second embodiment.

Fig. 10 is a front elevational view showing a heat insulating plate arrangement portion of a gas burner according to a second embodiment.

Form for implementing the invention

Referring to Fig. 1, reference numeral 1 is a burner provided in a gas burner according to an embodiment of the present invention. This burner 1 has a sub-combustor portion 2 and a main burner portion 3 surrounding the sub-combustor portion 2.

Referring to Fig. 2 to Fig. 6, the combustor 1 has a sub-combustor portion mixing pipe 21 and a main burner portion mixing pipe 31. The two mixing tubes 21 and 31 are arranged side by side in the furnace body 5 covered by the top plate 4 so that the inflow ports 21a and 31a of the upper ends of the mixing tubes 21 and 31 are opened in the same direction, and are fixed in the setting. On the burner support table 51 at the bottom of the furnace body 5. The inlets 21a and 31a of the mixing tubes 21 and 31 are covered by cover plates 23 and 33 having the front ends of the gas supply pipes 22 and 32 for the sub-combustion unit and the main burner unit. The gas nozzles 22a and 32a are inserted into the center nozzle insertion holes 23a and 33a, and the primary air holes 23b and 33b located therearound, and are formed to be detachably attached to the outer surfaces of the cover plates 23 and 33 by rotation. The flaps 24, 34 adjust the opening of the primary air holes 23b, 33b. Further, the injection of the fuel gas from the gas nozzles 22a and 32a is performed, and the primary air is sucked from the primary air holes 23b and 33b, and a mixed gas of the fuel gas and the primary air is generated in each of the mixing tubes 21 and 31.

The sub-burner portion is integrated with the end portions of the two mixing tubes 21 and 31 for the main burner portion which are measured downstream. The integrated portion is formed as an outer cylinder that is opened upward by the downstream end of the downstream end portion of the sub-combustor portion mixing pipe 21 and an outer cylinder that is open upward from the downstream end portion of the main burner portion mixing pipe 31. The inside and the outside of the 31b are formed in a cylindrical shape, and are inserted into the burner opening 41 opened in the top plate 4 with a gap. Further, in the upper portion of the integrated portion, the covering member 43 is fixed in such a manner that the outer peripheral edge portion thereof is located on the pad 42 provided at the edge portion of the burner opening 41, and is formed around the cover member. 43, a fire holder 44 having a plurality of fire holder claws 44a is placed on the top plate 4. Further, the pad 42 has the drip portion 42a extending downward, so that even if the overflowed soup invades between the cover member 43 and the pad 42, the soup that has been boiled is dripped by the drip portion 42a. The formation of the soup which prevents boiling to overflow flows along the lower surface of the top plate 4 to a position away from the burner opening 41.

Further, the burner 1 has a sub-burner main body 25 fitted to the upper end portion of the inner cylinder 21b, and an annular main burner main body 35 surrounding the sub-combustor main body 25. The main burner main body 35 is fitted to the upper end portion of the outer cylinder 31b to be guided to the passage portion 35a of the main burner main body 35 in the circumferential direction through the mixture of the autonomous burner portion mixing pipe 31, and the sub-combustion. The main body 25 is integrated.

The sub-burner cover 26 is placed on the sub-burner main body 25, and the sub-combustor portion 2 is constituted by the sub-combustor portion mixing pipe 21, the sub-combustor main body 25, and the sub-combustor cover 26. A plurality of sub-burner flame holes 27 are formed in the peripheral wall portion of the sub-burner cover 26 with a circumferential direction therebetween. Further, a distribution space defined by the mixture of the sub-combustor portion mixing pipe 21 and the sub-combustor main body 25 and the sub-combustor cover 26 is discharged from the sub-combustor flame hole 27 to be combusted.

Further, an annular main burner cover 36 is placed on the main burner main body 35, and the main burner portion mixing pipe 31, the main burner main body 35, and the main burner cover 36 constitute the main combustor portion 3. . A plurality of main burner flame holes 37 are formed in the peripheral wall portion of the outer periphery of the main burner cover 36 at intervals in the circumferential direction. Further, the mixed gas passage portion 35a from the main burner portion mixing pipe 31 and the distribution space defined between the main burner main body 35 and the main burner cover 36 are formed by the main burner flame hole 37. Squirting and burning.

Here, the total opening area of the sub-burner flame hole 27 is smaller than the total opening area of the main burner flame hole 37, and the rated combustion amount (maximum combustion amount) is that the sub-combustor portion 2 is smaller than the main burner portion 3. Further, in the burner 1, a glow plug 11 facing a portion around the main burner cover 36 and a thermocouple 12 as a flame detecting element facing the periphery of the sub-burner cover 26 are provided. Further, the main burner portion 3 is ignited by the ignition plug 11 to be fire-transferred from the main burner portion 3 to the sub-burner portion 2 to detect the pair of burner portions 2 by the thermocouple 12. The fire moved.

However, if the cooking occurs in the combustion of the burner 1, the overflow occurs. When most of the main burner flame hole 37 is clogged until the overflowing soup is blocked, a flame is reversely flowed in the main burner portion mixing tube 31, and the flame is transmitted through the main burner portion through the inlet 31a of the mixing tube 31. When the primary air hole 33b is blown out, similarly, if the sub-burner flame hole 27 is mostly clogged to the overflowing soup, the flame will flow back in the sub-burner portion mixing tube 21, and the flame is made by the vice The burner portion 21 is blown through the primary air hole 23b by the inlet 21a of the mixing tube 21.

Therefore, in the present embodiment, in order to detect the blowing of the flame from the inflow ports 21a and 31a of the respective mixing tubes 21 and 31 for the sub-combustion unit and the main burner unit, the top plate 4 is prevented from being blown by the flame. Abnormal overheating, and the composition is as follows. In other words, the opening direction of the inflow ports 21a and 31a of the mixing tubes 21 and 31 for the sub-combustor portion and the main burner portion is set to the X-axis direction, and the direction away from the inflow ports 21a and 31a is X. The outer side in the axial direction is set to the inner side in the X-axis direction, and the arrangement direction of the two mixing tubes 21 and 31 is set to the Y-axis direction, and the sub-combustor portion mixing tube 21 side is set. The side of the main burner portion mixing pipe 31 is set to the other side in the Y-axis direction, and the furnace body 5 is provided with a predetermined position across the X-axis direction to cover the inlets of the two mixing pipes 21 and 31 from above. 21a, 31a are common to the heat insulating plate 6 in the projection space on the outer side in the X-axis direction, and the thermistor 7 as a single heat-sensitive element is placed at a height higher than the center of the inflow ports 21a, 31a of the two mixing tubes 21, 31. It is also disposed above the heat shield 6 above.

In the present embodiment, the center height of the inflow port 21a of the sub-combustor portion mixing pipe 21 is the same as the center height of the inflow port 31a of the main burner portion mixing pipe 31, but the sub-combustion portion is used. Mixing tube 21 When the center height of the inflow port 21a is different from the center height of the inflow port 31a of the main burner portion mixing pipe 31, the above-mentioned "is located above the center height of the inflow ports 21a, 31a of the two mixing pipes 21, 31". It means that it is located above the center of the inlet above the position. In addition, the "predetermined position in the X-axis direction" is set to be the same as the position on the outermost side in the X-axis direction where the flame blown by the inflow port 31a of the main burner portion mixing pipe 31 is likely to reach.

According to the present embodiment, regardless of which of the mixing tubes 21 and 31 of the main burner portion and the sub-burner portion is blown, the flame can be prevented from coming into contact with the flame by the heat insulating plate 6. The case of the board 4 is to prevent abnormal overheating of the top board 4.

Further, when the main burner portion flame hole 37 is blocked, the flame blown from the inlet 31a of the main burner portion mixing pipe 31 is large, so that the combustion gas from the flame spreads over the Y-axis direction of the heat insulating plate 6. The entire width flows along the lower surface of the heat shield 6 to the outside in the X-axis direction. Therefore, as long as the thermistor 7 is located above the center height of the inflow ports 21a, 31a of the two mixing tubes 21, 31 for the main burner portion and the sub-combustor portion, the combustion gas reaches the thermistor 7, and The blowing of the flame from the inflow port 31a of the mixing tube 31 for the main burner portion can be detected.

On the other hand, when the sub-burner portion flame hole 27 is blocked, the flame blown from the inflow port 21a of the sub-combustor portion mixing pipe 21 is small, causing the combustion gas from the flame to face the heat insulating plate 6 toward The Y-axis direction is diffused and it becomes difficult to reach the thermistor 7. Then, in the present embodiment, the side plate on one side in the Y-axis direction of the heat insulating panel 6 is provided with a hanging plate portion 61 that is bent downward. In addition, the inlet 31a of the main burner portion mixing pipe 31 is located outside the inlet port 21a of the sub-combustor portion mixing pipe 21 in the X-axis direction, but the heat insulating plate 6 has the upper cover than the sub-combustion portion. The inflow port 21a of the mixing pipe 21 is a plate portion of a portion of the main burner portion mixing pipe 31 that protrudes outward in the X-axis direction. According to this, it is possible to prevent the combustion gas from the flame blown from the inflow port 21a of the sub-combustor portion mixing pipe 21 from the side edge of the heat insulating plate 6 on the Y-axis direction or the X-axis direction of the inflow port 21a. The side of the other side of the heat insulating plate 6 above the projection space in the Y-axis direction is separated from the upper side. Therefore, even if a flame is blown out from the inflow port 21a of the sub-combustor portion mixing pipe 21, the combustion gas reaches the thermistor 7, and the flame from the inflow port 21a of the sub-combustor portion mixing pipe 21 can be detected. Blow it out. Therefore, regardless of which of the mixing tubes 21 and 31 of the main burner portion and the sub-combustor portion is blown by the inlets 21a and 31a of the sub-combustion unit, the single thermistor 7 can detect the situation to reduce the cost. .

Furthermore, the signal from the thermistor 7 is input to a controller provided in the gas furnace. Further, when the inspection temperature of the thermistor 7 becomes equal to or higher than the predetermined determination temperature, it is determined that there is a flow inlet 21a in which the flame is used by the main burner portion and the sub-combustion portion of any one of the mixing tubes 21, 31. 31a is blown, and the electromagnetic safety valve provided between the gas supply paths to the auxiliary burner unit 1 is closed.

However, since the thermistor 7 can detect the temperature change with good responsiveness, it is possible to arrange the thermistor 7 in the side edge from the side in the Y-axis direction of the heat shield 6 to the side edge on the other side in the Y-axis direction. In the position of one Y-axis direction, it can be achieved not only from the mixing tube 31 for the main burner portion. The blowing of the flame at the inflow port 31a can be detected by the responsiveness of the flame from the inflow port 21a of the sub-combustor portion mixing tube 21. However, if the thermistor 7 is disposed in the Y-axis direction between the center of the inflow port 21a of the sub-combustor portion mixing pipe 21 and the side edge of the other side of the heat insulating plate 6 in the Y-axis direction, there is a flame. When the sub-burner portion is blown out by the inflow port 21a of the mixing pipe 21, the combustion gas flowing outward along the lower surface of the heat insulating plate 6 in the X-axis direction is separated from the outer edge of the heat insulating plate 6 in the X-axis direction to the upper side. This makes it difficult for the combustion gas to reach the thermistor 7.

Therefore, it is preferable that the thermistor 7 is disposed in the Y-axis direction between the center of the inflow port 21a of the sub-combustor portion mixing pipe 21 and the side edge of the other side of the heat insulating plate 6 in the Y-axis direction. At the end of the heat insulating plate 6 on the outer side in the X-axis direction, a Y-axis direction range which is at least across the side of the position where the thermistor 7 is disposed and the Y-axis direction of the heat shield 6 is provided and is bent downward. The plate portion 62 is lowered. According to this, when a flame is blown out from the inflow port 21a of the sub-combustor portion mixing pipe 21, the combustion gas flowing along the lower surface of the heat insulating plate 6 toward the outside in the X-axis direction can be prevented by the hanging plate portion 62. When the end edge of the heat insulating plate 6 on the outer side in the X-axis direction is separated from the upper side, the combustion gas is easily passed to the thermistor 7 to improve the flame blowout from the inflow port 21a of the sub-combustor portion mixing pipe 21. Precision. In the present embodiment, the thermistor 7 is disposed in the vicinity of the side edge of the other side of the heat insulating plate 6 in the Y-axis direction, and is disposed across the entire width of the heat insulating plate 6 in the Y-axis direction. The plate portion 62 is lowered.

Further, in the present embodiment, the hanging plate portion 63 bent downward is also provided on the other side of the heat insulating plate 6 in the Y-axis direction, and the thermistor is charged. The resistor 7 is inserted and fixed to the hanging plate portion 63. Thereby, the lead wire 71 connected to the thermistor 7 can be disposed outside the hanging plate portion 63. Here, although the lead wire 71 is covered with the heat-resistant coating 71a, exposure of the lead wire 71 to a high-temperature combustion gas adversely affects durability. As long as the lead wire 71 is disposed on the outer side of the hanging plate portion 63 as in the present embodiment, the lead wire 71 can be prevented from being exposed to the combustion gas by the hanging plate portion 63. In addition, when the thermistor 7 is disposed in the vicinity of the side edge of the heat insulating plate 6 on the Y-axis direction, the thermistor 7 may be inserted and fixed to the side edge of the heat insulating plate 6 on the side of the Y-axis direction. The plate portion 61 is lowered.

Further, in the present embodiment, the upper surface of the heat insulating panel 6 is formed so as to be located on the inner side in the X-axis direction than the portion of the hanging plate portion 63 to which the thermistor 7 is inserted and fixed, and in the Y-axis direction. Extended ridges 64. Thereby, even if the broth that has been spilled is dripped to the inner side of the heat shield 6 in the X-axis direction, the soup that has been boiled does not flow to the outside of the X-axis direction than the ridge 64. The thermistor 7 is inserted into the portion of the fixed lower plate portion 63, so that it is possible to prevent the soup which has been boiled from dripping onto the lead wire 71 connected to the thermistor 7.

Next, a second embodiment shown in Figs. 7 to 10 will be described. The basic structure of the second embodiment is not particularly different from the structure of the first embodiment. Therefore, the same components as those of the first embodiment are denoted by the same reference numerals.

The second embodiment differs from the first embodiment mainly in that it uses a bimetal switch 7' as a heat sensitive element. The bimetal switch 7' is provided as a flame detecting element to be attached to the sub-burner portion 1 The thermocouple 12 is disposed between thermocouple circuits connected to an electromagnetic safety valve or controller. When the combustion gas reaches the bimetal switch 7' and is above a predetermined temperature, the bimetal switch 7' is closed, so that the output of the thermocouple 12 cannot be input to the gas supply path provided to the auxiliary burner portion 1. The electromagnetic safety valve or controller, while the electromagnetic safety valve is closed.

Here, since the responsiveness of the temperature detection of the bimetal switch 7' is not as good as that of the thermistor 7, when it is disposed at one side or the other side of the Y-axis direction of the heat insulating plate 6, it is mixed with the autonomous burner portion in the future. It takes a lot of time until the blow of the flame of the inlet of the mixing tube of the mixing tube 21 of the sub-combustor portion in the Y-axis direction farther away from the arrangement position of the bimetal switch 7' is detected. Therefore, in the second embodiment, the bimetal switch 7' is disposed below the heat insulating panel 6, and the inlet 21a of the mixing tubes 21, 31 for the sub-combustor portion and the main burner portion is used. The position above 31a is at the position in the Y-axis direction between the center of the inflow port 21a of the sub-combustor portion mixing pipe 21 and the center of the inflow port 31 of the main burner portion mixing pipe 31. Thereby, the bimetal switch 7' can be closed in a short time regardless of whether the flame is blown from the inlets 21a, 31a of the mixing tubes 21, 31 for the main burner portion and the main burner portion.

In the second embodiment, the hanging plate portion 61 bent downward is provided on the side edge of the heat insulating plate 6 on the side in the Y-axis direction, and is disposed on the outer side in the X-axis direction of the heat insulating plate 6 in the same manner as in the first embodiment. The end edge is provided with a hanging plate portion 62 that is curved across the Y-axis direction range between the arrangement position of the bimetal switch 7' and the side edge of the heat shield 6 on the Y-axis direction.

Further, in the second embodiment, the heat insulating panel 6 and the first embodiment are In the configuration, the plate portion of the main burner portion mixing pipe 31 that protrudes outward in the X-axis direction from the inlet port 21a of the sub-combustion portion mixing pipe 21 is not covered. Instead, the Y-axis of the portion of the heat shield 6 that exists in the X-axis direction between the inlet 21a of the sub-combustor portion mixing pipe 21 and the inlet 31a of the main burner portion mixing pipe 31 is formed. The side edge of the other side of the direction is provided with the hanging plate portion 65 bent downward, and the hanging plate portion 65 can be prevented from being separated from the side edge by the side edge.

Although the embodiments of the present invention have been described above with reference to the drawings, the present invention is not limited thereto. For example, in the second embodiment, a thermal fuse may be used instead of the bimetal switch 7' as a heat sensitive element. Further, the lower end of each of the hanging plate portions 61 to 63, 65 of the first and second embodiments is placed so as to prevent the combustion gas flowing along the lower surface of the heat insulating panel 6 from flowing directly to the heat insulating panel 6 as it is. The height of the outer side is sufficient even if it does not reach the burner support table 51.

Further, the gas furnace of the above-described embodiment includes the burner 1 having the sub-combustor portion 2 and the inner and outer burners 3 surrounding the main burner portion 3, but also on the gas furnace having the following types of burners. The present invention is also applicable to the upper and lower two-layer type burners known in the Japanese Patent Laid-Open Publication No. 2009-63201, etc., which has a burner hole on the lower side of the flame hole of the main burner portion. .

1‧‧‧ Burner (Auxiliary Burner Division)

12‧‧‧ thermocouple

2‧‧‧Deputy Burner Division

22, 32‧‧‧ gas supply pipe

25‧‧‧Sub burner main body

26‧‧‧Sub burner cover

27‧‧‧Sub burner flame hole

3‧‧‧Main burner unit

31‧‧‧Mixed tube for main burner

31b‧‧‧Outer tube

33‧‧‧ cover

33b‧‧‧One air hole

34‧‧‧wind door

35‧‧‧Main burner body

35a‧‧‧Access Department

36‧‧‧Main burner cover

37‧‧‧Main burner flame hole

51‧‧‧burner support

6‧‧‧ Thermal insulation board

62‧‧‧Down plate section placed at the outer edge of the X-axis direction

65‧‧‧ The other side of the Y-axis direction of the portion of the heat insulating plate that exists in the X-axis direction range between the inlet of the mixing tube for the sub-combustion unit and the inlet of the mixing tube for the main burner portion Side plate

7‧‧‧Thermistor (heat sensing element)

X, Y‧‧ direction

Claims (7)

A gas burner comprising a burner having a main burner portion and a sub-combustion portion having a rated combustion amount smaller than that of the main burner portion, the gas furnace characterized in that the main burner portion is disposed in the furnace body covered by the top plate The mixing tube for the mixing tube and the sub-combustion unit is arranged side by side so that the flow inlets of the upper ends of the two mixing tubes are opened in the same direction, and the opening direction of the inlets of the two mixing tubes is set to the X-axis direction. The direction away from the inflow port is set to the outer side in the X-axis direction, the direction close to the inflow port is set to the inner side in the X-axis direction, and the arrangement direction of the two mixing tubes is set to the Y-axis direction, and the sub-combustor portion is used as a mixing tube. The side is set to the Y-axis direction side, and the main burner portion mixing tube side is set to the other side in the Y-axis direction, and a predetermined position across the X-axis direction is provided in the furnace body, and the inlets of the two mixing tubes are covered by the upper side toward the X. a common heat insulating plate in the projection space on the outer side in the axial direction, and a side plate on one side in the Y-axis direction of the heat insulating plate is provided with a hanging plate portion bent downward, and a single heat-sensitive element is placed in a flow ratio between the two mixing tubes The center height of the entrance is also To side panel disposed under the insulation. The gas furnace according to claim 1, wherein the heat insulating plate has a configuration in which the inlet of the mixing tube for the main burner portion is located outside the inlet of the mixing tube for the sub-combustor portion in the X-axis direction. The upper portion covers a portion of the portion of the main burner portion mixing pipe that protrudes outward in the X-axis direction from the inlet of the mixing tube for the sub-combustor portion. The gas furnace of claim 1, wherein the inlet of the mixing tube for the main burner portion is more than the inlet of the mixing tube for the sub-combustor portion In the outer side of the X-axis direction, the heat-insulating plate does not have a plate portion of a portion of the main burner portion mixing pipe that protrudes outward in the X-axis direction from the inlet of the sub-combustor portion mixing pipe. The side edge of the other side of the Y-axis direction of the portion of the heat insulating plate existing in the X-axis direction range between the inlet of the mixing tube for the sub-burner portion and the inlet of the mixing tube for the main burner portion is provided A downwardly bent lower plate section. The gas furnace according to any one of claims 1 to 3, wherein the heat-sensitive element is disposed at a center of an inlet of the mixing tube for the sub-combustor portion and a side edge of the other side of the heat insulating plate in the Y-axis direction In the configuration of the position in the Y-axis direction, the Y-axis between the side edges of the heat-insulating plate on the outer side in the X-axis direction and at least the side edge of the heat-insulating plate in the Y-axis direction is provided. The direction of the range is bent downward to lower the plate. The gas furnace according to any one of claims 1 to 4, wherein the hanging plate portion on a side edge of one side of the heat insulating plate in the Y-axis direction or the side edge on the other side of the heat insulating plate in the Y-axis direction The lowermost plate portion bent downward is inserted and fixed with a thermistor as the above-described heat sensitive element. The gas furnace of claim 5, wherein the upper surface of the heat insulating plate is formed to be located on the inner side in the X-axis direction from the portion in which the thermistor is inserted and fixed to the hanging plate portion, and in the Y-axis direction An overhanging ridge. The gas furnace according to any one of claims 1 to 4, wherein a Y-axis direction between a center of the inlet of the mixing tube for the sub-combustor portion and a center of the inlet of the mixing tube for the main burner portion A bimetal switch or a thermal fuse as the aforementioned heat sensitive element is disposed at a position.