KR910001007Y1 - Bruner for water heater - Google Patents

Abstract

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Description

Forced Blowing Combustor

1 is a cross-sectional view showing a gas scrubber using a combustion plate-type gas burner to which an embodiment of the forced-ventilated combustion apparatus of the present invention is applied.

2 is a cross-sectional view showing the main parts of the gas water purifier.

3 is a perspective view of the combustion case of the gas drawer.

4 is a perspective view of the burner body of the gas stove.

5 is a perspective view of the fixing bracket of the gas stove.

* Explanation of symbols for main parts of the drawings

1: gas cooker 2: burner

3: heat exchanger 4: combustion case

5: burner body 6: fixing bracket

7: Centrifugal Blower 8: Gas Supply Path

9: electronic control circuit 11, 12: first insulating plate

13,14: 2nd heat insulation board 15,16: 3rd heat insulation board

21: combustion gas burner 27,28: heat insulation plate

54: first protrusion 55: second protrusion

56: groove 61: fireproof frame

71: each other fan 73: scrawl casing

The present invention relates to a forced blowing type combustion device that lowers the temperature of the burner body to a predetermined temperature during combustion.

Conventionally, heat dissipators such as water dispersers and baths are welded by welding both ends of plate fins to the inner wall of the combustion casing, which is the combustion chamber. Fixed gas burners are arranged.

In conventional water purifiers, there is little concern that the fasteners will touch the flames, and therefore, there is little need to consider heat resistance.

However, in recent years, there has been a demand for a high-density burner using a forced blow-type gas burner for forcibly blowing combustion air and combustion gas by a fan for compact equipment. In this case, since the fixed bracket usually has an exposed portion in the combustion chamber, and the flame extended by the high load combustion returns, the exposed portion comes into contact with the flame and becomes a high temperature of about 1500 ° C. This is not obtained.

Therefore, in the Japanese Patent Application No. 60-164961, the present applicant directly contacts the fixing bracket for fixing the gas burner to the wall of the combustion case, and heat is transferred quickly through the combustion case to the plate fin of the heat exchanger to bring the fixing bracket to low temperature. We have proposed a wet scrubber using forced blown gas burners. Although the burner body is connected to an upstream side of the combustion case to introduce a mixture of combustion air and combustion gas, there is a problem that the mixture is not smoothly introduced due to thermal expansion if the burner body is overheated during combustion. there was.

The present invention has a burner body in which a forced-air gas burner is connected to a combustion case provided through a fixed bracket and an upstream side of the combustion case and introduces a mixer of combustion air and fuel gas. It is an object of the present invention to provide a forced blow-type combustion apparatus which lowers the temperature of the gas to a predetermined temperature to smoothly introduce a mixture of combustion air and combustion gas.

The forced blow type combustion apparatus of the present invention is provided with a burner body in which a forced blow gas burner is connected to a combustion case installed through a fixed bracket and upstream of the combustion case, and introduces a mixture of combustion air and fuel gas. In the forced-air combustion apparatus, a means in which a heat insulating material for reducing the temperature of the burner body to a predetermined temperature is employed between the fixing tool and the combustion case and the burner body.

In the present embodiment, a forced blow gas burner is connected to a combustion case installed through a fixed bracket and an upstream side of the combustion case, and an electric fan that supplies, regulates and stops the supply of gas and flue gas that blows combustion air to the gas burner. A forced blow combustion apparatus having a burner body for introducing a mixture of combustion air and fuel air from a scowl casing having a nozzle connected to a gas supply pipe provided with a safety valve, wherein the fixed bracket, the combustion case, and the The structure which interposes the heat insulation material which reduces the temperature of the said burner body to the predetermined temperature which a motor of a fan and an electronic safety valve operate correctly at the time of combustion with a burner body is adopted.

The forced blowing type combustion apparatus of the present invention adopts the above means, and has the following effects and effects.

Since a heat insulating material is interposed between the fixing bracket and the combustion case and the burner body, the thermal conductivity of both the gas burner and the burner body is lowered and the temperature of the burner body is reduced. By lowering the temperature to a predetermined temperature, it is possible to smoothly introduce a mixer of combustion air and fuel gas.

Since the forced blow type combustion apparatus of this embodiment has a heat insulating material between the fixing bracket and the combustion case and the burner body, the heat conduction between both the fixing bracket and the combustion case is not directly connected and the gas burner is burned, and thus the conductivity of heat is reduced. It is possible to lower the temperature of the burner body at the time of combustion, and it is possible to reduce the temperature of the electronic safety valve installed in the fan motor and fuel gas gas supply pipe to the temperature at which it can be operated safely. There is. Therefore, the temperature at which the fan's motor and electronic safety valve are operated correctly and the intake of combustion air is stopped or the supply of fuel gas is stopped or excessive due to the malfunction of the fan's motor and electronic safety valve. In this case, it is possible to accurately avoid the risk of carbon monoxide or live gas being released by the gas burner due to incomplete combustion or flame extinguishing.

An embodiment of the forced blow type combustion apparatus of the present invention will be described with reference to the drawings.

FIG. 1 shows the gas bath of this embodiment, and FIG. 2 shows the main parts thereof.

In this embodiment, a forced blow combustion apparatus was applied to the gas cooker (1). The gas cooker 1 is connected to a combustion case 4 including a combustion section 2 and a heat exchanger 3 and a burner body 5 at a lower portion of the combustion case 4 and having a cylindrical shape. A centrifugal blower (7) comprising a sirocco fan (71), a fan (71) and a spur casing (73) with an inlet (72) opened and a motor (not shown) for driving the fan (71). And a gas supply passage 8 and an electronic controller 9.

The combustion section 2 is provided with a combustion plate-type gas burner 21 made of ceramic provided with a plurality of ejection holes penetrating through the ceramic plate and provided with a fixing bracket 6 in the combustion case 4. And an exhaust fan 24 provided above the combustion chamber 22 and having an exhaust port 23 for exhausting combustion gas combusted by the gas burner 21.

The heat exchanger (3) consists of a group of plate fins (31), a water supply pipe (32), and a hot water supply pipe (33) for increasing the heat exchange rate, and is disposed between the burner (21) and the exhaust port (23) upstream of the water supply pipe (32). The water sent from the heat exchanger with the exhaust gas in the combustion chamber 22 flows out from the hot water supply pipe 33 as hot water.

The combustion case 4 has a spherical cylindrical shape as shown in FIG. 3, and the upper end 41 and the lower end 42 are opened. On the upper end 41 and the lower end 42, flange portions 41a and 42a are provided on the outer circumference thereof.

A screw hole 43 is formed in the flange portion 41a of the upper end 41. The screw hole 44 is formed in the flange part 42a of the lower end 42, and the screw hole (screw 45a in FIG. 3) is formed in the rear wall 42c of the lower part 42b of the flange part 42a. Invisible)) is formed. The recessed part 45 provided with this screw hole is dug more than the other part of the rear wall 42c, and only the inner wall surface of this recessed part 45 contacts the burner body 5.

The lower end 25 of the exhaust fan 24 is provided with a flange portion 25a corresponding to the flange portion 41a of the upper end 41 of the combustion case 4.

The flange portion 41a of the combustion case 4 and the flange portion 25a of the exhaust fan 24 are divided into two L-shapes to form the screw holes 27a and 28a, and at the same time, the insulating plates 27 and 28 serving as gaskets. ) And are fastened by screws. The rear wall 46 of the combustion case 4 is provided with the metal fitting 49 provided with the screw hole 48 for installing the combustion case 4 in the rear wall 47a of the main body case 47. As shown in FIG.

The burner body 5 has a spherical shape as shown in FIG. 4 and is integrally formed with aluminum die casting to form the inlet 51 of the mixer in the center of the bottom 50 and the upper part is opened. The burner body 5 has a groove 56 surrounded by a first protrusion and a second protrusion 55 on the outer circumferential portion 53 via a stage 52 supporting the rectifying plate 29 from the bottom 50. To form.

Screw holes 58 and 59 are formed in the upper end 57 of the first protrusion 54 and the semicircular groove 56a of the groove 56.

Moreover, the screw hole 60 is formed also in the side surface of the outer periphery 53. The upper portion 57 of the first protrusion 54 and the flange portion 42a of the lower portion 42 of the combustion case 4 are divided into two L-shapes to form screw holes 11a and 12a and at the same time gasket. It is superposed | polymerized via the 1st heat insulation boards 11 and 12 which double | doubled, and is fastened by the screw. Moreover, the lower part 42b and the burner body 5 of the combustion case 4 are arrange | positioned at predetermined intervals. In addition, the lower end of the ceramic fireproof frame 61, which has the outer periphery 21a and the outer side surface 21b of the second protrusion 55, the gas burner 21, and the gas burner 21 outwardly, 61a) is polymerized via the 2nd heat insulation boards 13 and 14 divided | segmented into L shape.

The fixing bracket 6 is disposed in direct contact with the inner circumferential wall surface of the combustion case 4, and is formed by a metal plate made of stainless steel as shown in FIG. 5, and is a spherical frame-shaped bracket, and the fireproof frame 61 is top 62. It is supported by the flange part 62a and the side wall 63 of the.

The lower end 64 of the fixing tool 6 forms the flange part 64a, and the screw hole 65 is formed in the semi-circular protrusion part 65a of the flange part 64a.

The flange portion 64a is inserted into the groove 56 of the burner body 5 so that the groove 56 does not contact the wall surfaces of both sides and is divided into two L-shapes to form the screw holes 15a and 16a. At the same time, they are polymerized via the third heat insulating plates 15 and 16 serving as gaskets and fastened by screws. The semi-circular projection 65a is fitted into the recess 56a of the groove 56 of the burner body 5 and has a predetermined gap between the inner and outer circumferences of the fixing bracket 6 and the burner 5. Positioning is done so as not to touch.

Here, the fire frame 61 may be formed integrally with the gas burner 21, but is preferably formed separately as in the present embodiment in order to improve the impact resistance.

The first to third heat insulating plates 11 to 16 and the heat insulating plates 27 and 28 each have an aluminum foil as a reinforcing material in order to overlap each other and have strength between the single plates. In addition, the first to third heat insulating plates 11 to 16 and the heat insulating plates 27 and 28 are excellent in heat resistance and relatively low in thermal conductivity, and in this embodiment, foamed glass (heat conductivity: 0.05 Kcal / mhdeg) or glass is used. Fiber (thermal conductivity: 0.03 Kcal / mhdeg) is used.

The gas supply passage 8 is integrally formed together with the scowl casing 73 and the gas ejection nozzle 81 for ejecting fuel gas and the gas supply pipe 82 for supplying fuel gas to the gas ejection nozzle 81. ) And a gas control unit 83. The gas control unit 83 is provided between the gas ejection nozzle 81 and the gas supply pipe 82 and is an electronic on / off valve 84 opened and closed by energization and non-energization, and a downstream side of the on / off valve 84. And a governor valve (not shown) for adjusting the gas flow rate and an electronic proportional control valve 85 provided on the downstream side of the governor valve, the aperture ratio of which is varied depending on the amount of energization.

The other end of the gas ejection nozzle 81 is provided with an orifice 86 for adjusting fuel gas supply pressure and flow rate.

The electronic control circuit 9 is a volume for temperature control (not shown) which is operated by a start switch (not shown) user who is turned on when the gas heater 1 is used and sets the temperature of water flowing out from the hot water supply pipe 33 (not shown). Spark electrode 92 and centrifugal blower 7 in which sparks are splashed on the combustion surface of gas burner 21 at the time of ignition in response to an input of a thermocouple 91 for detecting the oxygen supply state of the flame of gas burner 21. Control of energization and non-energization of the motor and the gas control unit 83 and the like.

The operation | movement at room temperature 25 degreeC of the gas stove 1 of this embodiment is demonstrated based on drawing.

When the start switch is turned on, the gas cooker 1 rotates the fan 71 of the centrifugal blower 7 and supplies combustion air to the gas burner 21 from the inlet 72 of the scowl casing 73. .

The electronic control circuit 9 outputs the on / off valve 84 and the proportional control valve 85 of the gas control unit 83 to open the on / off valve 84 and the proportional control valve 85.

For this reason, fuel gas is sucked in the scowl casing 73 and mixed with combustion air. The mixer passes through the inlet 51 of the burner body 5, and when the spark electrode 92 generates a spark discharge, it ignites quickly and burns in the gas burner 21. At this time, as the flame enters due to combustion, the exposed portion (the flange portion 62a of the upper end 62) of the fixing tool 6 touches the flame, and the inner circumferential surface of the fireproof frame 61 is also in series.

And the flange part 64a of the side wall 63 and the lower end 64 of the fastening tool 6 becomes 400 degreeC.

The combustion case 4 which is in contact with the side wall 63 of the fixing bracket 6 includes (the fixing bracket 6 → the combustion case, (4) → the plate fin group 31 and the water supply pipe 32 of the heat exchanger 3). Since the heat is transferred smoothly in the order of the hot water supply pipe 33, the temperature is at most 150 ° C. The combustion case 4, the fixing bracket 6, the outer periphery 21 of the gas burner 21, the first protrusion 54 of the fireproof frame 61 and the burner body 5, and the second protrusion ( 55 and the groove 56 are provided via the 1st-3rd heat insulation boards 11-16, respectively. For this reason, in the case where the combustion case 4, the fixing bracket 6, the outer periphery 21a of the gas burner 21, and the fireproof frame 61 and the burner body 5 are installed as in the related art, the burner body is The burner body 5 of the present invention, which has been set at 110 ° C but has the first to third insulation plates 11 and 16 interposed therebetween, can be reduced to a predetermined temperature (80 ° C to 85 ° C). The introduction of the mixer with the combustion gas can be performed smoothly.

The temperature (80 ° C to 85 ° C) of the burner body 5 includes a motor of the fan 71 for blowing combustion air to the gas burner 21, an electronic on / off valve 84, and an electronic proportional control valve 85. It is possible to lower the temperature of the scroll casing 73 in which the gas ejection nozzle 81 connected to one gas supply pipe 8 (which has been 70 ° C. in the conventional scroll casing) to a low temperature of 55 ° C. It was. Accordingly, the motor of the fan 71, the electronic on / off valve 84, the electronic proportional control valve 85 are set to 55 deg. When the suction of combustion air is stopped due to a malfunction of) or the supply of fuel gas stops or becomes excessive and the oxygen concentration or the gas concentration decreases, carbon monoxide caused by incomplete combustion or the flame off in the gas burner 21 is lost. The risk of release of raw gas can be accurately avoided.

In this embodiment, the plate is applied to a single material, but other shapes may be used, and the material is not limited to this embodiment.

In the present embodiment, the forced blow-type combustion apparatus of the present invention is applied to a gas scrubber using a burner type gas burner, but may be applied to a gas scrubber using a burner type gas burner or a gas scrubber. A forced blow combustion device may be applied to a gas fired heating device.

Although the burner body and the scowl casing are separate bodies in this embodiment, the burner body may be formed integrally.

Claims (4)

In the forced blow type combustion apparatus, a forced blow gas burner having a combustion case installed by fixing a fixed bracket and a burner body connected to an upstream side of the combustion case and introducing a mixture of combustion air and fuel gas, wherein Forced blow combustion device characterized in that between the bracket (6) and the combustion case (4) and the burner body (5) interposed a heat insulating material for reducing the temperature of the burner body (5) to a predetermined temperature during combustion. . The gas burner is a combustion plate type gas burner (21) provided with a plurality of ejection holes in a ceramic plate, and the fixing bracket (6) supports the outer edge (21a) of the combustion plate. Forced blow combustion device. The burner body (5) according to claim 2, wherein the burner body (5) has a groove (56) surrounded by a first protrusion (54) and a second protrusion (55) on the outer periphery (53) and the first protrusion (54). ) Is connected to the combustion case (4) and the first heat insulating material (11, 12) and the second protrusion (54) is interposed between the combustion plate (4) and the second heat insulating material (13, 14) And the groove (56) is connected to the fixing bracket (16) via a third heat insulator (15, 16). The burner body (5) according to claim 1, wherein the burner body (5) is provided with a nozzle casing (73) having a nozzle (81) connected to a gas supply pipe (82) including a fan (71) and an electronic safety valve (84) upstream. Forced blow type combustion apparatus characterized in that the connection.