JPH0263129B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a combustion air intake device in a combustion apparatus that stably generates a gas mixture of fuel and combustion air.

[Prior Art and Problems to be Solved by the Invention] When a combustion device is installed in a wind path through which outside air flows, and the combustion air is sucked in according to the flow of the outside air, When it is necessary to adjust the combustion range widely (that is, when the combustion range from low flow rate to large flow rate of fuel is required), especially when burning at a low flow rate, the outside air flowing through the air duct is This may cause the combustion flame to rise and cause a misfire. This problem was a particularly serious problem when a large amount of drying air for drying grains was distributed through the air path.

Additionally, when the outside temperature is low, the blower tube of the combustion device is cooled by the cold air sent by the blower fan, which inhibits the gasification of the fuel and prevents stable combustion. Sometimes there isn't.

As a conventional technology to solve this problem,
No. 53-158943, but in this prior art, a part of the burned exhaust gas passes through the inner cylinder at the center of the combustion cylinder and returns to the mixing chamber, where it mixes with air and atomized oil. The method is to generate a combustible mixture, but when this conventional device is placed in the air passage as in the present invention, the main air for combustion is drawn in along the flow direction of the outside air in the air passage. However, if the amount of combustion is small, the above-mentioned problem of the combustion flame floating up and causing a misfire still occurs.

[Means for Solving the Problems] The present invention aims to solve the above-mentioned problems, and has taken the following technical means to solve the above-mentioned problems.

That is, a combustion device 3 that blows out a combustion flame in the direction of the flow is arranged in an air path 2 through which dry air flows by a fan 1, and a combustion air intake 4 of the combustion device 3 is directed against the flow of the dry air. When installing the combustion air inlet 4 in the air passage 2 so as to open in the direction, one outside air inlet 4a of the combustion air inlet 4 is located near the base of the combustion flame of the combustion device 3, and the combustion air intake The other hot air intake port 4b of the combustion device 3 is arranged near the front end of the combustion flame of the combustion device 3.

[Operations and Effects of the Invention] A combustion device that blows out a combustion flame in the flow direction is disposed in an air passage 2 through which outside air flows through a fan 1, and a combustion air inlet 4 of the combustion device 3 is connected to a flow of dry air. Since the air passage 2 is installed in such a way that it opens in the direction opposite to the direction of It can prevent floating and maintain a stable combustion state.

Further, the air passage 2 is arranged such that the combustion air intake port 4 of the combustion device 3 is opened in a direction opposite to the flow of dry air.
When installing the combustion air inlet 4 inside the combustion chamber, one outside air inlet 4a of the combustion air inlet 4 is placed near the base of the combustion flame of the combustion device 3, and the other hot air inlet 4b of the combustion air inlet 4 is placed near the base of the combustion flame of the combustion device 3. Since it is located near the tip of the combustion flame of the device 3, the outside air intake port 4a
Relatively low-temperature outside air is taken in from the hot air intake port 4b, and air warmed by the combustion flame is taken in from the hot air intake port 4b. However, it is possible to prevent combustion due to red flame and further stabilize the combustion action.

[Example] Hereinafter, an example of the present invention will be specifically described based on the drawings.

First, to explain the configuration of the device, the drying chamber consists of a hot air chamber 6 provided inside the grain storage chamber 5.
and an exhaust chamber 7 provided on the outside.

The combustion chamber 8 and the suction chamber 9 are the grain storage chamber 5,
They are arranged opposite to each other with a drying chamber composed of a hot air chamber 6 and an exhaust chamber 7 interposed therebetween, and are communicated with each other via the drying chamber. Inside this combustion chamber 8, there is a combustion tube 3a and a carburetor tube 3b.
A known combustion device 3 comprising a blower tube (not shown) provided inside the vaporization tube and the like is disposed.
A fan 1 is provided in the suction chamber 9, and when the fan 2 rotates, outside air is taken in from an intake part 8a provided at the rear of the combustion chamber 8, and air is drawn in through the air passage 2 in the combustion chamber 8. , the hot air chamber 8, the grain storage chamber 5, and the exhaust chamber 7, and are discharged to the outside of the machine.

The combustion device 3 is installed in the air passage 2 of the combustion chamber 8, and is composed of atomized fine particles of the supplied fuel and a combustion fan 17 provided at the bottom of the combustion chamber 8. Combustion device 3 burns the mixed gas with air.
The structure is such that the combustion flame is blown out in the direction of the flow of outside air (A in the figure).

The blower device 10 includes the blower fan 17 and a motor 11 that drives the blower fan 17, and communicates with the blower chamber 13 of the fuel device 3 via the blower path 12.

The combustion air intake port 4 is connected to the combustion chamber 8 when viewed from the front.
(i.e., the center of the combustion device 3), the outside air intake port 4a is located below the combustion tube 3b in side view, and is formed at the tip of the intake tube 14.
and a hot air intake port 4b whose rear end looks into the intake cylinder 14, and whose other end is located on the lower side close to the tip of the combustion flame, and which is formed at the tip of the auxiliary intake cylinder 15. It is made up of. In addition, the intake cylinder 1
4 and the auxiliary intake cylinder 15 are integrally configured,
Wire meshes 4c and 4d with small openings are attached to the hot air intake port 4b and the outside air intake port 4a.

Next, its effect will be explained. First, after feeding grain into the grain storage chamber 5 and rotating the fan 1, the carburetor motor (not shown) is driven.
The vaporizer cylinder 3b is rotated, and the motor 11 is also driven to rotate the blower fan 17. Next, after a predetermined period of time, the fuel pump and fuel valve (both not shown) start operating and fuel is supplied, and the fuel is atomized into atomized atomized particles by the fuel diffuser (not shown) of the combustion device 3. This atomized fuel is mixed with the combustion air (temporary combustion air) produced by the blower fan 17, and passes through the air mixture passage between the blower tube (not shown) and the vaporizer tube 3b into the combustion tube 3a. After the fuel is fed into the engine, it is ignited by the ignition device 16.
Since the vaporization tube 3b is gradually heated by this ignition, the gas mixture coming through the mixture passage (not shown) is further promoted to gasify, and the combustion tube 3b is further promoted to gasify.
The hot air is vigorously ejected from a combustion plate (not shown) installed in the interior of the hot air chamber 6 toward the hot air chamber 6, forming a combustion flame and burning as shown in FIG.

On the other hand, when the outside air taken in from the intake part 8a formed at the rear part of the combustion chamber 8 by the rotating fan 17 flows through the air passage 2, it mixes with the hot air of the combustion flame and is heated to become hot air. The air is discharged from the hot air chamber 6 to the outside of the machine via the grain storage chamber 5, from the exhaust chamber 7 to the suction chamber 9, and when passing through the grain storage chamber 5, it removes water from the surface of the grain. Do it.

When the air for combustion is taken in by the blower fan 17, the outside air inlet 4a opens in a direction opposite to the flow of outside air flowing in the air passage 2, so that the combustion flame is ejected from the outside air inlet. 4a becomes approximately equal, and even if there is a change in the amount of suction air passing through the air passage 2, the effect on the combustion action will be reduced, and in addition, part of the hot air of the combustion flame will be removed from the hot air intake port 4b. Even when the outside air temperature is low, warm combustion air can be sent into the blower tube (not shown) of the combustion device 3 and the vaporization tube 3b, further promoting the vaporization of the fuel. Let me,
Eliminates red flame combustion and results in good combustion with blue flame.

Furthermore, since the outside air inlet 4a is provided below the combustion chamber 3a and the hot air inlet 4b is provided below the tip of the combustion flame, there is less turbulence in the combustion flame.
By providing wire meshes 4c and 4b at the tips of the outside air intake port 4a and the hot air intake port 4b, straw waste can be prevented from being sucked in.

Furthermore, when the combustion device 3 is viewed from the front, both the inlets 4a and 4b are located at the center in the left-right direction, so that not only the stability of the combustion flame but also the drying work performance can be improved.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a partially cut side view of the dryer, Fig. 2 is a front view of the combustion device, and Fig. 3 is a cut side view of the dryer. FIG. 4 is a cutaway plan view of the drying chamber. Explanation of symbols, 1...Fan, 2...Wind path, 3...
... Combustion device, 3a... Combustion tube, 3b... Vaporization tube,
4...Combustion air intake port, 4a...Outside air intake port, 4
b...hot air inlet, 5...grain storage chamber, 6...hot air chamber, 7...exhaust chamber, 8...combustion chamber, 8a...intake section, 9...suction chamber, 10...blower device , 11...
...Motor, 12...Blower path, 13...Blower chamber, 1
4...Intake cylinder, 15...Auxiliary intake cylinder, 17...Blower fan.

Claims (1)

[Claims] 1. A combustion device 3 that blows out a combustion flame in the direction of the flow is arranged in the air passage 2 through which the drying air flows by the fan 1, and the combustion air inlet 4 of the combustion device 3 is arranged in the direction opposite to the flow of the drying air. When installing the combustion air inlet 4 in the air passage 2 so as to open to A combustion air intake device for a combustion device in which the other hot air intake port 4b of the combustion device 3 is arranged correspondingly to the front end side of the combustion flame of the combustion device 3.