JPS5812494B2 - Ekitainenriyounenshiyousouchi - Google Patents

Description

[Detailed description of the invention] The present invention relates to a liquid fuel combustion device.

Recently, there have been many so-called forced intake/exhaust type liquid fuel combustion devices that discharge exhaust gas from the combustion chamber to the outside and supply combustion air from the outside. The headwind caused pressure changes in the combustion chamber, which upset the balance of fuel supply and caused abnormal combustion and flames to blow out.

The present invention has been made in view of the above points, and is configured so that even if pressure changes in the combustion chamber due to headwinds such as gusts from outside, steady combustion is performed with a constant supply of fuel and good ignition is achieved. This is what I did.

The present invention will be described below with reference to an embodiment shown in the drawings.A liquid fuel combustion apparatus main body 1 has a cylindrical hollow body 2 with a large number of through holes 3.
, 3 are formed into an air supply chamber 6 in which a fan 5 for forcibly supplying combustion air is disposed, and a drive chamber 8 in which a motor 7 for driving the fan 5 is disposed. A fuel supply chamber 12 in which a fuel supply electromagnetic valve 11 is arranged and the drive chamber 8 are separated by a partition wall 10 having holes 9, 9, an air inflow hole 13 in the center, and a through hole 14 near the periphery.
The shaft 1 of the motor 7 is
A fuel scattering chamber 22 in which a rotary blade 17, a scattering plate 18, and a rotary body 19 which are pivotally supported so as to rotate together with the fan 5 by a fuel scattering chamber 22 and a burner part 21 having a fuel vaporization heater 20 wound therein; A combustion chamber 26 in which a burner head 25 having a slit 24 and 24 provided at the tip of the burner portion 21 by a bent edge of the cylindrical hollow body 2 having through holes 23 and 23 is exposed to the supply chamber 12. and the fuel scattering chamber 22, and an appropriate number of heat exchange pipes 28, 28 are connected to one end of the combustion chamber 26 and connected to the combustion gas storage chamber 27, The gas reservoir chamber 27 communicates with an exhaust pipe 29.

Further, a fuel control device 31 connected to a fuel tank (not shown) through a fuel supply pipe 30 is connected to a fuel discharge pipe 33 whose tip is bent upward through a solenoid valve 32. The tip of the pipe is a ventilation pipe 34 with one end bent upward and opened, and a connecting pipe 36 with a narrow pipe part 35 at the other end.
It's coming inward.

One branched from the other end of the connecting pipe 36 is the solenoid valve 1.
1, and the other becomes an air communication pipe 38 that communicates with the drive chamber 8 and transmits pressure fluctuations, and the narrow pipe portion 35 of the connection pipe 36 and the air communication pipe 3B are connected to the The fuel outlet tube 43 is a substantially U-shaped tube that is bent until it is positioned below the tip opening of a fuel outlet tube 43 that is guided from the electromagnetic valve 11 to the upper side of the rotating body 19 .

Further, an intake pipe 40 integrally attached to the wall 39 with the exhaust pipe 29 communicates with the air supply chamber 6, and a flame detection device 41 and a spark plug 42 are installed on the side wall of the combustion chamber 26.
is arranged.

The present invention is constructed as described above, and the operation of the present invention will be described below. When combustion starts, the heater 20 is energized, the burner section 21 is preheated, and the air communication pipe 38 and the narrow pipe section 35 reach the level A-B. Fuel is full.

When the thermostat placed in the fuel scattering chamber 22 is activated by heating by the heater 20, the motor 7 is activated, and the fan 5, rotating body 19, scattering plate 18, and rotating blades 17 rotate and remain in the combustion chamber 26, etc. Although the gas is removed, the pressure Pa caused by the fan 5 is applied to the air communication pipe 38, so the level A,
B moves to A/, B/ and has a pressure difference H1 between it and the flat level L of the tip opening of the fuel outlet pipe 43.

Next, the electromagnetic valves 11 and 32 are opened and a constant amount of fuel flows into the connecting pipe 36 from the discharge pipe 33, and the fuel guided from the outlet pipe 43 is scattered and vaporized by the rotating body 19, the scattering plate 18, and the rotating blade 17. , the spark plug 42 ignites and starts combustion, but in this case, the level A' is A"
, the level B' moves to B'' and stable fuel supply is performed with a pressure difference H2 smaller than the pressure difference H1.

Now, when a headwind such as a gust occurs, the pressure inside the combustion chamber 26 increases through the combustion gas reservoir chamber 27 and the pipes 28, 28, and the pressure inside the combustion chamber 26 increases through the tip of the fuel outlet pipe 43, the intake pipe 40, the air supply chamber 6, and the drive chamber 8. As a result, pressure is applied to the air communication pipe 3, and since the ventilation pipe 34 is open to the atmosphere, the level A" moves to the level A"' and the level B" moves to the level B"', but the narrow pipe section 35
The inner diameter φB of the air communication pipe 38 and the inner diameter φA of the air communication pipe 38 are φA>φB
Because of the relationship, B" compared to the moving height of A"-A"/
The height of '-B'' is dog, and the pressure difference between the tip of the outlet pipe 43 and level B'' is H3.

Therefore, H3 becomes a dog in proportion to the strength of the air blowing, and the lead-out pipe 4
Fuel supply from No. 3 continues.

As described above, the present invention performs combustion using the fuel flowing out from the fuel outlet pipe, exhausts the combustion gas to the outside, and supplies combustion air from the outside to the burner part through the intake pipe. The upper part of the connecting pipe that faces the opening at the tip of the fuel discharge pipe to be connected to the device is opened to the outside air, and a narrow pipe portion is formed at an appropriate position in the connecting pipe below the fuel discharge pipe, and the connecting pipe is opened downward. One end of the air communication pipe is connected to a fuel supply pipe connected to the outlet pipe, one end of the air communication pipe is connected to a combustion air supply unit such as a drive chamber, and the other end of the air communication pipe is connected to the fuel supply pipe, so that the connecting pipe and the fuel Since the communication part with the supply pipe and the communication part between the air communication pipe and the fuel supply pipe are located below the tip opening of the outlet pipe, steady combustion is carried out with a constant amount of fuel flowing out from the fuel control device. ,
Furthermore, if there is a headwind, the pressure difference is taken out by the narrow pipe portion of the connecting pipe in proportion to the magnitude of the headwind, thereby eliminating interruptions in the fuel flow and allowing stable combustion to continue without stopping the fuel supply.

In addition, since the communication parts between the fuel supply pipe, the connecting pipe, and the air communicating pipe are located below the opening at the tip of the fuel outlet pipe, the pressure during back wind can be reliably applied to the air communicating pipe and the connecting pipe. This has effects such as contributing to stable combustion.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway front view of the present invention, FIG. 2 is a cross-sectional view of the same essential part, and FIG. 3 is a state diagram showing fluctuations in fuel level. 1...Liquid fuel combustion device main body, 35...Narrow pipe portion, 37...
...Fuel supply pipe, 38...Air communication pipe.

Claims (1)

[Claims] 1 Fuel that is connected to a fuel control device that supplies a constant amount of fuel in a device that performs combustion using fuel flowing out of a fuel outlet pipe, exhausts combustion gas outdoors, and also supplies combustion air from the outdoors to the burner section via an intake pipe. The upper part of the connecting pipe facing the opening of the distal end of the discharge pipe is opened to the outside air, and a narrow pipe part is formed in a suitable position of the connecting pipe below the fuel discharge pipe, and the lower end of the connecting pipe is connected to the outlet. The air communication pipe is connected to a fuel supply pipe connected to the pipe, and one end of the air communication pipe is connected to a combustion air supply unit such as a drive chamber, and the other end of the air communication pipe is connected to the fuel supply pipe, so that the connecting pipe and the fuel supply pipe are connected to each other. A liquid fuel combustion device characterized in that a communication section between the air communication pipe and the fuel supply pipe is located below the tip opening of the outlet pipe.