JPS6238094Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a hot air generator used for drying rice, kelp, etc., and in particular does not use gas fuel.
This relates to a self-evaporation type device that is capable of generating flame by vaporizing the fuel within the device by supplying liquid fuel (liquefied gas) such as LPG.

Conventionally, some types of single burners have been used that can supply liquid fuel and generate flames, but
None of the above-mentioned hot air generators takes into account the vaporization of liquid fuel, and therefore not only cannot a flame be obtained unless gas fuel is used, but it is also difficult to obtain a hot air generator with a high calorific value. This resulted in expensive defects due to the addition of various equipment.

In addition, with existing equipment, the flame that is the source of hot air generation is inadvertently elongated by the air flow, and this enters the drying chamber that is connected to the hot air generation equipment, resulting in burnout of the material to be dried. It also had

The present invention attempts to solve the above-mentioned drawbacks of the conventional example by appropriately incorporating a mechanism for vaporizing liquid fuel into the hot air generator itself. , has an outer cylinder 3 having an outside air inlet 1 at its base end and a tapered hot air outlet 2 at its distal end for blowing hot air into a drying chamber (not shown), etc.; On the base end side of 3, a blower 4 is fixedly installed inside in order to blow the outside air from the outside air inlet 1 forward.
5 in the figure indicates the fan.

Further, on the front side of the blower 4, a combustion tube 6 formed concentrically is installed up to the base end of the tapered portion 3'. A cooling air introduction gap 7 is provided between the outer cylinder 3 and the outer cylinder 3 so that the air blown by the blower 4 can pass through and reach the hot air outlet 2. 8 is formed by an inner cavity 7' and an outer cavity 7''.

The combustion tube 6 is provided with a proximal end plate 9 that closes its outer peripheral portion 6', and the plate 9 is provided with a combustion air intake port 10 through which the blast air flows. By fixing a concentric flame shielding plate 11 at the outlet end of the cylinder 6, the flame outlet 13 is located inside the air cooling outlet 12 of the cooling air introduction gap 7, and the flame outlet 13 is Moreover, in the tapered part 3', a curved shielding pipe 15 for vaporization is located in a position facing the front of the flame jet port 13 and the air cooling jet port 12, and has an inner opening 14 in the axial center. The interior is fixed.

The shielding pipe 15 is formed by bending the pipes as closely as possible, and in the illustrated example, it is formed by winding the pipes in a spiral from the outer center side to the inner center side, and the outer center side of the shielding pipe 15 is The starting end 1 is
A liquid fuel pipe 16 extends from 5' to supply liquid fuel from the outside, and a vaporized fuel pipe 17 is led out from the terminal end 15'' on the inner center side, and then connected to the base end plate 9. A burner nozzle 18 is provided at the tip that penetrates through the center of the combustion chamber 6 and is oriented toward the front side.
Furthermore, an igniter 1 for igniting the nozzle 18
Reference numeral 9 indicates an electromagnetic valve provided through the base end plate 9, and 20 in the figure indicates an electromagnetic valve provided in the liquid fuel pipe 16 for controlling the opening and closing of the supply of liquid fuel, and in the illustrated example, the vaporized fuel pipe 17 is Although it is installed on the outside of the outer cylinder 3, it is also possible to design the cooling air introduction gap 7 to be large and allow the air to pass through it.

Therefore, in order to operate the above-mentioned configuration, if liquid fuel is supplied to the liquid fuel pipe 16 and is allowed to flow into the curved shield pipe 15 for vaporization, in the process of flowing through the same pipe 15, The liquid fuel is vaporized by the latent heat of the member, and the vaporization progresses gradually to obtain vaporized fuel, and the vaporized fuel is ejected from the burner nozzle 18 from within the shield pipe 15 via the vaporized fuel pipe 17. Therefore, a flame can be obtained by igniting it with the igniter 19.

In order to easily carry out the above-mentioned ignition, a pilot nozzle (not shown) capable of ejecting gaseous fuel may be provided in the igniter 19, and a small flame may be ignited in the pilot nozzle.

If a flame is generated by the burner nozzle 18 in this way, the flame will flow through the flame outlet 13 of the combustion tube 6.
The liquid fuel flowing out from the pipe 15 heats the curved vaporization shield pipe 15, thereby vaporizing the liquid fuel in the pipe 15, and the subsequent evaporation of the fuel is completely and smoothly performed.

When the flame is ejected from the flame outlet 13 to the front side as described above, the air flows out from the air cooling outlet 12 and hits the shield pipe 15, so that the flow direction of the air is as indicated by the arrow. As in the axial direction,
In other words, the flame is changed to the side of the flame shielding plate 11, and therefore the flame from the flame outlet 13 is engulfed to the side of the plate 11 along with the air flow due to the change in course.
After the flame remains in a turbulent state, it is extinguished, and thus the flame does not enter the drying chamber from the hot air outlet 2 and burn out the material to be dried.

As embodied in the above embodiment, the present invention has an outer cylinder 3 having an outside air inlet 1 on the proximal end and a hot air outlet 2 on the distal end, and a blower provided on the proximal end. A concentrically formed combustion tube 6 is installed inside the front side of the combustion chamber 4, and a cooling air introduction gap 7 is formed between the combustion tube 6 and the outer tube 3 through which the air blown by the blower 4 flows to the hot air outlet 2. At the same time, a flame shielding plate 11 is fixedly arranged at the outlet of the combustion tube 6 in a concentric manner and has a flame outlet 13 formed on its outer periphery. 13 and the air cooling jet port 12 of the cooling air introduction gap 7, a curved shielding pipe 15 for vaporization having an inner opening 14 is provided, and liquid fuel is supplied from the starting end 15' of the shielding pipe 15. At the same time, the terminal end portion 15'' has a burner nozzle 1 fixed to the base end plate 9 of the combustion tube 6, which is provided with the combustion air intake port 10 through which the blast air flows.
Since the burner nozzle 18 is provided with an igniter 19 for igniting the burner nozzle 18, the liquid fuel supplied to the curved vaporization shield pipe 15 is vaporized by the latent heat of the member. Even if liquid fuel is used, it is possible to continuously generate flame while vaporizing it.

Once a flame is generated, the curved vaporizing shield pipe 15 is placed in front of and opposite the flame outlet 13, so it is maintained at a high temperature, making it possible to provide extremely good vaporizing conditions. Moreover, in the present invention, not only the extension length of the flame is controlled by the flame shield plate 11, but also the flame from the flame jet port 13 is extinguished by the arrangement of the air cooling jet port 12 and the curved vaporizing shield pipe 15. This eliminates the conventional drawback of grains being burnt due to flames entering the drying chamber, and furthermore, the formation of the cooling air introduction gap 7 prevents the outer cylinder 3 from overheating, making it safer for users. can be operated.

[Brief explanation of the drawing]

The figure is a longitudinal sectional front view showing an embodiment of the hot air generator according to the present invention. 1...Outside air inlet, 2...Hot air outlet, 3...
Outer tube, 4...Blower, 6...Combustion tube, 7...Cooling air introduction gap, 9...Base end plate, 10...Combustion air intake port, 11...Flame shielding plate, 12...Air cooling jet port , 13...Flame spout, 14...Inner mouth, 15
... Curved shielding pipe for vaporization, 15' ... Starting end,
15″...Terminal part, 18...Burner nozzle, 19
...Igniter.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. An outer cylinder having an outside air inlet on the base end and a hot air outlet on the distal end is formed concentrically with the front side of the blower provided on the base end. A combustion tube is installed inside the combustion tube, and a cooling air introduction gap is formed between the outer tube and the air blower to allow the air blown by the blower to pass through to the hot air outlet. A flame shielding plate having a flame outlet formed on its outer periphery is fixedly installed, and an inner center opening is provided on the front end side of the outer cylinder, facing the front of the flame outlet and the air cooling outlet of the cooling air introduction gap. An open curved shield pipe for vaporization is provided, and the liquid fuel is supplied from the starting end of the shield pipe, and the terminal end is connected to the base end plate of the combustion cylinder, which is provided with the combustion air intake into which the blast air flows. A self-evaporating hot air generator for liquefied gas combustion, which communicates with a fixed burner nozzle and is provided with an igniter for igniting the burner nozzle. 2. The self-evaporating hot air generation for liquefied gas combustion according to claim 1, wherein the curved shielding pipe for vaporization is formed by a spirally wound pipe located on the outer peripheral side of the inner center opening. Device.