JP2009115349A - Air heating device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air heating device capable of efficiently supplying the superheated air by burning a hydrogen-oxygen mixed gas and sucking the same by a suction pump. <P>SOLUTION: An inner pipe 52 of a burner 10 is kept into contact with a suction opening 13 of the suction pump 12, and the suction opening 13 of the suction pump 12 is entirely covered by an outer pipe 50 as shown in a drawing 10. Further A central portion of the suction pump 12 is covered by the inner pipe 52 joined to the outer pipe 50. In this state, a gas is supplied from a hydrogen-oxygen mixed gas generating device, the gas is passed through a burner main pipe 34, a burner chip 31 and a plurality of nozzles 30, and ignited by an ignition plug 53. Here, flame and the air in the burner pipe 10 are sucked by the suction pump 12 and the heated air 21 is efficiently discharged by operating the suction pump 12. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an air heating apparatus that can efficiently blow out heated air using a burner that burns a hydrogen / oxygen mixed gas.

  Combustion burners are frequently used in heating furnaces, industrial heaters, welding machines, and the like. Such a combustion burner is also used for a device that blows out heated hot air, such as a temperature control device such as a greenhouse, a heater in a cold region, a snow melting machine, a dryer at the time of building construction, etc. Widely used.

  A normal combustion burner uses city gas, propane gas or the like as fuel and supplies air to the fuel to continue predetermined combustion.Generally, compressed air is sent into the combustion chamber by a blower, and this compressed air is While helping combustion, the warm air heated in the combustion chamber is blown out from the combustion burner.

  However, in recent years, hydrogen / oxygen mixed gas has come to be used as a combustion gas.

  The inventor has invented an apparatus for producing a hydrogen / oxygen mixed gas using electrolysis and provides it for various uses.

  In addition, the present inventor has provided a hydrogen / oxygen mixed gas combustion burner for various uses using an apparatus for producing a hydrogen / oxygen mixed gas using electrolysis.

  The technology that the present inventor has implemented in the past will be introduced.

  FIG. 11 is a diagram showing the structure of a combustion burner that burns hydrogen / oxygen mixed gas and blows out hot air. A nozzle is provided inside the combustion chamber 62, the combustion chamber 62 is heated by the nozzle 61, and the ceiling plate and the like are heated. A hot air chamber 63 is provided above the combustion chamber 62, and heat energy in the combustion chamber 62 is transmitted to the hot air chamber 63 by heating a heat exchange plate 64 provided between the two chambers. To do. Hot air fins are provided in the hot air chamber 63, and a technique is introduced in which the pressurized air from the blower 60 provided on the back surface of the hot air chamber 63 is heated and blown out as hot air.

  By the way, in the above-described invention, the combustion chamber and the hot air chamber are provided, and the heated air is blown out as hot air by the blower, so that the structure becomes complicated and the cost is increased.

  Further, since the hydrogen / oxygen mixed gas is burned in the combustion chamber, the flame flows back to the mixed gas source, and backfire is likely to occur.

  Further, in order to prevent the above-described flame from flowing back to the mixed gas source and causing backfire, a backfire prevention device is necessary and the structure becomes complicated.

  In order to achieve the above object, the present invention includes a burner that burns a hydrogen / oxygen mixed gas, and a motor-driven suction pump that sucks flame of the burner together with ambient air and discharges heated air. To do.

  And a flame introduction cover attached to the suction pump and fitted to the tip of the burner.

  Moreover, it has a plurality of nozzles at the tip of the burner.

  Further, the burner has a burner tip connecting the plurality of nozzles and a main pipe through which the hydrogen / oxygen mixed gas flows, and the burner chip has the hydrogen / oxygen mixed gas flowing from the main pipe. A plurality of passages for supplying gas to the plurality of nozzles are provided, and the total of the plurality of passage areas provided in the burner tip is smaller than the passage area of the main pipe.

  According to the present invention, it is possible to provide an air heating device using a burner and a suction pump, so that the structure is simple and the manufacturing cost can be reduced.

  Further, according to the present invention, since the combustion flame by the hydrogen / oxygen mixed gas is sucked by the suction pump, it is possible to prevent the flame from flowing back to the mixed gas source to cause backfire.

  Further, since it is possible to suppress the backflow of the flame due to the backflow to the mixed gas source, the backfire prevention device can have a simple structure.

  Further, by combining the burner and the suction pump with the flame introduction cover, heat can be efficiently transferred without being escaped.

  Further, since the hydrogen / oxygen mixed gas has a characteristic that the flame converges during combustion, the local part in the suction pump can be warmed intensively. Therefore, when the pump sucks the ambient air, it quickly takes heat away from the part of the pump where the air is heated, diffuses this heat to the surrounding space and the pump part, and heats the entire suction pump quickly and almost uniformly. It is possible to increase the temperature of the discharged air.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

[Embodiment 1]
Details of Embodiment 1 of the present invention will be described below.

  FIG. 1 is a perspective view of a burner for burning a hydrogen / oxygen mixed gas according to the present invention, FIG. 2 is a perspective view of a suction pump driven by a motor according to the present invention, and FIG. 3 is a flame of the burner. It is a perspective view of the air heating device concerning the present invention which shows that the air is sucked with a suction pump and heated air is discharged.

  The overall configuration of the first embodiment will be described.

  The air heating device 20 includes a suction pump 12 that sucks flame together with air and discharges heated air 21, a burner 10 that burns a hydrogen / oxygen mixed gas, and a device 22 that generates a hydrogen / oxygen mixed gas. Is done. Details of the component parts will be described below.

  The suction pump 12 includes a suction port 13 that sucks the flame 11 of the burner 10 together with ambient air, and a discharge port 14 that discharges the heated air 21. Gas is supplied from the hydrogen / oxygen mixed gas generator 22, flows through the burner 10, flame is sucked together with air into the suction port 13 of the suction pump 12, and heated air 21 is discharged from the discharge port 14 of the suction pump, The air heating device 20 is formed.

  In addition, a motor 15 is incorporated in the back surface of the suction pump 12, and the impeller 16 that is pivotally supported in the suction pump is rotated to circulate the air and flame that have entered the suction port 13, thereby discharging the pump. The heated air 21 is discharged from. Since the suction pump 12 directly receives the flame 11 from the burner 10, it is made of a material that can withstand heat of 250 ° C. For example, titanium is preferably used.

  Further, the burner 10 for burning the hydrogen / oxygen mixed gas is connected to the hydrogen / oxygen mixed gas generator 22 by using electrolysis, and flows through the gas path in the burner 10 to suck the flame 11 through a suction pump. 12 to suck. The structure of the burner 10 will be described in detail in Embodiment 2 described later.

  With these configurations, the flame 11 from the burner 10 that burns the hydrogen / oxygen mixed gas is sucked by the suction pump 12 and discharged as heated air 21 from the discharge port 14 of the pump. As a result, the heated air 21 can be efficiently discharged to the outside.

  Further, since the hydrogen / oxygen mixed gas has a characteristic that the flame converges during combustion, the local part in the suction pump can be warmed intensively. Therefore, when the pump sucks the ambient air, it quickly takes heat away from the part of the pump where the air is heated, diffuses this heat to the surrounding space and the pump part, and heats the entire suction pump quickly and almost uniformly. It is possible to increase the temperature of the discharged air.

  Details of Embodiment 2 of the present invention will be described below.

[Embodiment 2]
FIG. 4 is a perspective view of a flame introduction cover according to the present invention, and FIG. 5 is a perspective view when the flame introduction cover is attached to a suction pump. FIG. 6 is a side view when the burner tip is provided with a plurality of nozzles and the burner tip and the burner main pipe are connected. FIG. 9 shows a side view when the air heating device according to the present invention in Embodiment 2 described above is disassembled for each main part.

The overall configuration of the second embodiment will be described with reference to the exploded view described above. The overall configuration includes a suction pump 12, a flame introduction cover 24 in which the suction port 13 of the suction pump 12 and the burner tip end are fitted, the burner 10, and a hydrogen / oxygen mixed gas generator 22. These element parts constitute an air heating device. The burner 10 is formed of a nozzle 30, a burner tip 31, a connector 33 and a main pipe 34. Details of the component parts will be described below.
However, since the suction pump 12 and the hydrogen / oxygen mixed gas generator 22 are the same as those in the first embodiment, the description thereof is omitted.

  The burner tip 31 has 3 to 5 nozzles 30 at the front, and thin passages 32 corresponding to the number of the nozzles 30 are provided inside. Further, the rear part of the burner chip 31 is fitted with the connector 33 so that gas does not leak. The shape of the rear portion of the burner tip 31 and the shape of the connector 33 may be any shape that does not allow gas to leak.

  Here, what is important is the path area of the passage 35 provided in the main pipe and the narrow passage 32 provided in the burner tip. Details are described below. 7 is a cross-sectional view of the burner tip 31 taken along line AA in FIG. 8 is a cross-sectional view of the burner main pipe taken along line BB in FIG. Specifically, when three nozzles are arranged in the burner tip 31, there are three narrow passages 32 provided in the burner tip. At that time, the total area of the passage holes 40 of the three passages 32 is smaller than the area of the passage holes 41 provided in the main pipe. In this description, the number of nozzles is three, but the same is true when the number of nozzles actually mounted is increased. By reducing the passage area in this way, the structure is such that the flame does not flow back to the mixed gas source and hardly causes backfire.

  Further, as described above, the flame introduction cover 24 is fitted to the suction port 13 of the suction pump and the tip of the burner. The shape of a fitting part should just be a structure which does not leak a flame. Further, since the cover is provided, the flame is confined in the cover and heat does not leak, so that the thermal efficiency is very good.

  With these configurations, the gas supplied from the hydrogen / oxygen mixed gas generator 22 circulates through the passage 35 provided in the burner main pipe and through the narrow passage 32 provided in the burner tip. Then, a flame is ejected from the plurality of nozzles 30.

  Further, the flame that has passed through the flame introduction cover 24 is sucked by the suction pump 12 and discharged as heated air 21 from the discharge port 14 of the pump, as in the first embodiment. This makes it possible to efficiently discharge the heated air 21 to the outside.

  Details of Embodiment 3 of the present invention will be described below.

[Embodiment 3]
FIG. 10 is a cross-sectional view of the air heating apparatus according to the present invention showing that the flame of the burner in Embodiment 3 is sucked by a suction pump and heated air is discharged.

  As an overall configuration, the first embodiment is improved.

  The air heating device 20 includes a suction pump 12 that sucks flame together with air and discharges heated air 21, and a burner 10 that burns a hydrogen / oxygen mixed gas. Details of the component parts will be described below.

  The suction pump 12 includes a suction port 13 that sucks the flame of the burner 10 together with ambient air, and a discharge port 14 that discharges the heated air 21. Combustion gas is supplied from the hydrogen / oxygen mixed gas generator, and the flame is sucked into the suction port 13 of the suction pump 12 together with the air through the burner 10.

  The burner 10 includes an outer tube 50 having a hollow inside, and four air holes 54 are provided at the rear. Moreover, it has the inner pipe | tube 52 in the inside. The inner tube 52 is provided with a plurality of nozzles 30, and a burner tip 31 is inserted in the rear part thereof so as to be movable in the axial direction. A hydrogen / oxygen mixed gas flows through the front end of the burner tip 31. A tube 34 is provided. Further, the outer tube 50 and the inner tube 52 are integrally joined at the rear portion, and as described above, the nozzle 30 and the burner tip 31 can move left and right in the inner tube 52, and the pressure of the kind mixed gas of the nozzle 30 Accordingly, the position of the nozzle 30 can be determined appropriately.

  A rotatable air adjusting rotating plate 51 is provided at the rear of the hollow outer tube 50. The rotation plate 51 has four air adjustment rotation holes 55, which are arranged at the rear of the outer tube 50 and are rotatable with the main tube 34 through which gas flows. By rotating the rotating plate 51, air sucked into the outer tube 50 by the air adjusting rotating hole 54 provided in the outer tube 50 and the air adjusting rotating hole 55 provided in the rotating plate 51. The pressure can be adjusted.

  A spark plug 53 is installed through the outer tube 50 and the inner tube 52 so that the hydrogen / oxygen mixed gas can be ignited.

  A suction pump network 56 is provided at the rear of the suction port 13 of the suction pump 12. The suction pump network 56 is the same size as the diameter of the suction port 13 of the suction pump.

  Details of the third embodiment using the above-described component parts will be described below.

  In the third embodiment, the inner tube 52 of the burner 10 is brought into contact with the suction port 13 of the suction pump 12, and the entire suction port 13 of the suction pump 12 is covered with the outer tube 50 as shown in FIG. Further, the central portion of the suction pump 12 is covered with an inner tube 52 joined to the outer tube 50. In this state, the hydrogen / oxygen mixed gas is supplied from the hydrogen / oxygen mixed gas generator, and the hydrogen / oxygen mixed gas passes through the burner main pipe 34, the burner tip 31, and the plurality of nozzles 30. Oxygen mixed gas ignites. At this time, by operation of the suction pump 12, the flame and the air in the burner pipe 10 are sucked by the suction pump 12, and the heated air 21 is discharged.

  Here, what is important is that the suction pump 12 is covered with the outer pipe 50, a part of the suction port 13 of the suction pump 12 is covered with the inner pipe 52, and the air adjustment rotating plate 51 is used to place the suction pipe 12 between the outer pipe 50 and the inner pipe 52. That is, the amount of air in the provided space can be adjusted. By adopting such a configuration, air can hardly be sucked from other than the burner 10. That is, when a large amount of ambient air from other than the outer tube 50 is sucked freely by the suction pump 12, the air in the outer tube 50 becomes difficult to be sucked, and the suction force at the tip of the nozzle 30 is reduced. There is a possibility of causing a backfire by causing the generated flame to flow backward. However, with this configuration of the present embodiment, air in only the space of the burner 10 is rapidly sucked by the suction pump 12 as shown by the arrow in FIG. 10, and as a result, a large negative pressure is generated around the flame of the nozzle 30. Is generated, and the flame is pulled to the suction pump side, and it is possible to reliably prevent backfire.

  That is, by bringing the outer tube 50 and the inner tube 52 into contact with the suction pump 12, the air flowing in from the four air adjusting air holes 55 provided in the air adjusting rotary plate 51 flows in the direction of the arrow in FIG. It will be. That is, since almost the entire suction port 13 of the suction pump 12 is covered with the inner tube 52, a negative pressure path is formed between the outer tube 50 and the inner tube 52. Therefore, the flame from the nozzle 30 is sucked into the suction pump 12 vigorously without causing a reduction in the suction force of the suction pump 12, and does not cause a reverse flow of the flame generated from the nozzle 30.

  By setting it as the above structure, it is attracted | sucked with the suction pump 12, and is discharged as the air 21 heated from the discharge port 14 of the pump. This makes it possible to efficiently discharge the heated air 21 to the outside.

  Moreover, although embodiment mentioned above uses hydrogen and oxygen mixed gas, implementation with other combustible gas is also possible.

It is a perspective view of the burner which burns the hydrogen-oxygen mixed gas which concerns on this invention. 1 is a perspective view of a motor-driven suction pump according to the present invention. It is a perspective view of the air heating device concerning the present invention which shows that the flame of a burner is sucked with a suction pump, and heating air is discharged. It is a perspective view of the flame introduction cover concerning the present invention. It is a perspective view when a flame introduction cover is attached to the suction pump. It is a figure which shows a side view when a some nozzle is provided in a burner tip and a burner tip and a burner main pipe are connected. It is sectional drawing when a burner chip | tip is cut along line AA of FIG. It is sectional drawing when a burner main pipe is cut along line BB of FIG. It is a side view when the air heating device concerning the present invention is disassembled for every main part. It is sectional drawing of the air heating apparatus which shows that the flame of the burner in Embodiment 3 is attracted | sucked with the suction pump, and heated air is discharged | emitted. It is principal part sectional drawing which shows the internal structure of the hydrogen-oxygen mixed gas combustion burner invented by this inventor quoted in background art.

Explanation of symbols

  10 Burner, 11, 66 Flame, 12 Suction pump, 13 Suction port, 14 Discharge port, 15 Motor, 16 Impeller, 20 Air heating device, 21 Heated air, 22 Hydrogen / oxygen mixed gas generator, 24 Flame introduction cover , 25 Suction pump fitted with flame introduction cover, 30 nozzle, 31 burner tip, 32 narrow passage provided in burner tip, 33 connector, 34 main pipe, 35 passage provided in main pipe, 40 burner Passage hole in the chip, 41 passage hole in the main pipe, 50 outer pipe, 51 air adjustment rotary plate, 52 inner pipe, 53 spark plug, 54 four air holes in the main pipe, 55 air adjustment rotary hole, 56 Suction pump network, 60 blower, 61 nozzle, 62 combustion chamber, 63 hot air chamber, 64 heat exchange plate, 65 hot air outlet.

Claims (4)

A burner for burning a hydrogen / oxygen mixed gas;
A motor-driven suction pump that sucks the flame of the burner together with the ambient air and discharges the heated air;
An air heating device comprising: The air heating device according to claim 1,
A flame introduction cover attached to the suction pump and fitted to the burner tip;
An air heating device comprising: The air heating device according to claim 1 or 2,
An air heating apparatus comprising a plurality of nozzles at a tip of the burner. The air heating device according to claim 3,
The burner has a burner tip that connects the plurality of nozzles and a main pipe through which the hydrogen / oxygen mixed gas flows,
The burner tip is provided with a plurality of passages for supplying the hydrogen / oxygen mixed gas flowing from the main pipe to the plurality of nozzles,
An air heating apparatus characterized in that a total of a plurality of passage areas provided in the burner tip is smaller than a passage area of a main pipe.

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