JPH0238208Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention relates to a hot air generator equipped with a rotary evaporative burner, and in particular, to prevent supply air from being drawn into the combustion space of the rotary evaporative burner. The present invention relates to a hot air generator equipped with a rotary vaporizing burner that can maintain stable combustion conditions.

[Conventional technology]

A hot air generator that generates hot air by burning fuel and using it as a heat source includes a burner. Burners include gas fuel burners, liquid fuel burners, solid fuel burners, etc. depending on the type of fuel used.
There are two types of liquid fuel burners: the spray combustion method and the evaporative combustion method.The spray combustion method, which is particularly frequently used, includes hydraulic spray burners that spray fuel under pressure using a fuel pump, and hydraulic spray burners that spray fuel under pressure using a fuel pump. There are rotary vaporizing burners, etc., which supply fuel to a rotating body, atomize it by centrifugal force, vaporize it, and burn it.

[Problem that the invention attempts to solve]

However, when the rotary evaporative burner is applied to a hot air generator, if air is supplied by a blower to the rotary evaporative burner installed in the hot air generator, the supplied air may be drawn into the combustion space of the rotary evaporative burner. There is a problem with This entrainment causes the combustion flame to be blown back, and this combustion flame excessively heats the vaporization cylinder provided in the rotary vaporization burner for vaporizing liquid fuel, causing it to become red hot. For this reason, the fuel supplied into the vaporization cylinder does not vaporize due to the Leidenfrost phenomenon and becomes granular, and the combustion of this granular fuel produces a red flame and causes fluctuations in the flame.
This resulted in the inconvenience that the combustion state became unstable.

[Purpose of invention]

Therefore, the purpose of this invention is to realize a hot air generator equipped with a rotary evaporative burner that can maintain a stable combustion state by preventing supply air from being drawn into the combustion space of the rotary evaporative burner.

[Means for solving problems]

In order to achieve this objective, this invention provides a rotary vaporizing burner in a hot air generator that supplies liquid fuel to a rotating body, atomizes it by centrifugal force, vaporizes it, and burns it. A rectifying member is provided in front of the combustion space to prevent supply air from being drawn into the combustion space.

[Effect]

According to the configuration of this invention, a rectifying member is provided in front of the combustion space of the rotary vaporizing burner installed in the hot air generator, thereby rectifying the air supplied by the blower and preventing it from being drawn into the combustion space. To prevent. As a result, the combustion flame is not blown back, and excessive heating is avoided by the combustion flame of the vaporization tube provided in the rotary vaporization burner that vaporizes the liquid fuel, thereby stabilizing the combustion state.

〔Example〕

Embodiments of this invention will be described in detail below based on the drawings.

1 to 4 show examples of this invention. In the figure, 2 is a hot air generator, and 4 is a rotary vaporizing burner.

As shown in FIGS. 3 and 4, the hot air generator 2 includes a rotary vaporizing burner 4, which will be described later, inside a cylindrical main body 6.
The fuel pumped up from the fuel tank 8 is combusted and used as a heat source, and the generated hot air is blown out from the outlet 10. Between the cylindrical body 6 and the fuel tank 8, there is a control device 1 for controlling the combustion state of the rotary vaporizing burner 4.
2 are installed.

Inside the cylindrical main body 6 of the hot air generator 2, a first
As shown in the figure, the rotary vaporizing burner 4 is provided. In the rotary vaporizing burner 4 , a motor 18 rotates a vaporizing cylinder 16 that is loosely fitted around the outer periphery of a blower cylinder 14 . Fuel pumped up from the fuel tank 8 by a fuel pump 20 is supplied into the blast cylinder 14 through a fuel pipe 22 . An inner combustion tube 24 and an outer combustion tube 26 are disposed concentrically around the outer periphery of the vaporization tube 16 to form a combustion space 28 . This combustion space 28 is provided with an ignition plug 30. Further, the motor 18 is located behind the rotary vaporizing burner 4.
A fan 32 rotated by the fan 32 is provided to constitute a blower.

The rotary vaporizing burner 4 scatters fuel supplied into the blast tube 14 through the fuel pipe 22 into the vaporizing tube 16, and atomizes the fuel by the rotational centrifugal force of the vaporizing tube 16. This atomized fuel is ignited by the spark plug 30 to start combustion. After the combustion starts, combustion heat heats the vaporization tube 16 to vaporize the fuel, and combustion continues by burning a mixture of the vaporized fuel and air supplied by the fan 32.

In the cylindrical main body 6 of the hot air generator 2 in front of the rotary vaporizing burner 4, an inner cylinder 34 is attached to a holding member 3.
6 is maintained. This inner cylinder 34 forms a cylindrical hot air generation space 38 that shields the combustion heat of the rotary vaporizing burner 4 and generates hot air using the combustion heat and the supplied air.

By the way, when air is supplied into the hot air generation space 38 by the fan 32, the combustion space 28 of the rotary vaporizing burner 4 is
The supply air is drawn in, causing the inconvenience of unstable combustion conditions.

Therefore, in this invention, a rectifying member is provided in front of the combustion space 28 of the rotary vaporizing burner 4. In this embodiment, the inner cylinder 34 in front of the combustion space 28
Inside, a flow regulating tube 40 serving as a flow regulating member is supported by a support member 42 . The rectifier cylinder 40 is formed to have a slightly larger diameter than the vaporizer cylinder 16, as shown in FIG. 1, and is supported at a location where it can rectify the supply air as shown by the solid arrow without involving it.

Next, the effect will be explained.

The hot air generation device 2 burns fuel using the rotary vaporization burner 4, generates hot air in the hot air generation space 38 using the combustion heat and the supplied air, and blows the generated hot air from the blower port 10. put out.

The air supplied by the fan 32 to the hot air generation space 38 is supplied to the combustion space 2 of the rotary vaporization burner 4.
8 as shown by the broken line arrow. However, since the rectifier cylinder 40 provided in the inner cylinder 34 in front of the combustion space 28 rectifies the supplied air as shown by the solid arrow, the supplied air flows directly into the combustion space 28.
8 can be prevented from being caught. This results in
Since the vaporizing tube 16 of the rotary vaporizing burner 4 is prevented from being excessively heated and red-hot by the combustion flame blown back, the fuel does not vaporize due to the Leidenfrost phenomenon and becomes granular, resulting in a stable combustion state. can be maintained.

In addition, in this embodiment, the rectifying tube 40 is connected to the support member 4.
2, but it can also be provided so as to be able to approach and separate from the combustion space 28. For example, the rectifier tube 40
By changing the attachment position to the inner cylinder 34 using the support member 42 and providing it removably, it is possible to set the rectifying cylinder 40 at an optimal position where it can rectify the supplied air, and it is also possible to use a variety of hot air generators 2. It becomes possible to adapt it to Or, the rectifier tube 4
By changing the attachment position of the inner cylinder 34 supporting the 0 to the cylindrical main body 6 using the holding member 36 and providing it detachably, it is possible to obtain the same effects as described above.

[Effect of idea]

As explained in detail above, according to this invention, a rectifying member is provided in front of the combustion space of the rotary vaporizing burner installed in the hot air generating device, thereby rectifying the air supplied by the blower and directing it to the combustion space. can be prevented from becoming entangled. As a result, the combustion flame is not blown back, so it is possible to avoid excessive heating by the combustion flame of the vaporization cylinder installed in the rotary vaporization burner that vaporizes the liquid fuel, and it is possible to maintain a stable combustion state. can.

[Brief explanation of the drawing]

Figures 1 to 4 show examples of this invention, with Figure 1 being a cross-sectional view of the hot air generator, Figure 2 being a front view of the rectifying tube portion of the hot air generator, and Figure 3 showing the hot air generator. The front view and FIG. 4 are side views of the hot air generator. In the figure, 2 is a hot air generator, 4 is a rotary vaporizing burner, 6 is a cylindrical body, 16 is a vaporizing cylinder, 18 is a motor, 22 is a fuel pipe, 28 is a combustion space, 32 is a fan, and 34 is an inner cylinder. , 36 is a holding member, 38 is a hot air generation space, 40 is a rectifying tube, and 42 is a support member.

Claims (1)

[Scope of utility model registration request] A rotary vaporizing burner that supplies liquid fuel to a rotary body, atomizes it by centrifugal force, vaporizes it, and burns it is provided in the hot air generator, and also entrains the supplied air into the combustion space of the rotary vaporizing burner. A hot air generator equipped with a rotary vaporizing burner, characterized in that a rectifying member is provided in front of the combustion space in order to prevent this.