JPS5833391Y2 - liquid fuel combustion equipment - Google Patents

Description

[Detailed explanation of the idea] 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 exhaust combustion gas from the combustion chamber outdoors and supply combustion air from outside. The headwind caused a pressure change in the combustion chamber, causing an imbalance in the fuel supply and causing abnormal combustion such as turbulent flames, or combustion could stop due to the flames blowing out.

The present invention was devised in view of the above-mentioned drawbacks, and is designed to ensure stable combustion at all times even if the pressure inside the combustion chamber changes due to headwinds such as gusts of wind from outside.

Below, an embodiment of the present invention will be described based on the drawings.A liquid fuel combustion device main body 1 has a cylindrical hollow body 2 which has a large number of through holes 3,
an air supply chamber 6 in which a fan 5 for forcibly supplying combustion air is arranged through a partition wall 4 having a hole in the air supply chamber 6;
A fuel supply chamber 12 in which a solenoid valve 11 for fuel supply is disposed and a fuel supply chamber 12 in which a solenoid valve 11 for fuel supply is disposed, and a partition wall 10 having a large number of through holes 9 are formed in a drive chamber 8 in which a motor 7 is disposed. Furthermore, an air inflow hole 13 is provided in the center, and a through hole 14 is provided near the periphery.
, 14 are provided therein, and a rotary blade 17, a scattering plate 18, and a rotating body 19 which are supported by the shaft 16 of the motor 7 so as to rotate together with the fan 5 are installed therein, and a heater 20 for fuel vaporization is wound therein. A slit 24 is provided at the tip of the burner portion 21 by a bent edge of the cylindrical hollow body 2 having a through hole 23° 23 in the scattering chamber 22 in which the burner portion 21 is installed and in the fuel supply chamber 21. A combustion chamber 26 facing a burner head 25 having a diameter of .24 and the scattering chamber 22
A suitable number of heat exchange pipes 2 are connected to the combustion gas storage chamber 27 at one end of the combustion chamber 26.
8.28... is connected to the combustion gas storage chamber 2.
7 communicates with an exhaust pipe 29.

A pump 33 for pumping up the fuel is installed at an appropriate location on a fuel pumping pipe 32 led out from inside the fuel tank 31 having a through hole 30, and the first branch from the pumping pipe 32 pumps the fuel led to the electromagnetic valve 11. The supply pipe 41 becomes the supply pipe 41, and the other one branched at a position above the supply pipe 41 hangs downward and becomes the overflow pipe 34 of the fuel tank 31,
Furthermore, the other end of one of the overflow pipes 34 extending upwardly communicates with the drive chamber 8, serving as an air communication pipe for transmitting pressure fluctuations.

The overflow pipe 34 is bent upward at a suitable point midway, and then further bent downward to form a storage section 36.
In addition, the tip opening 34a extends into the fuel tank 31, so that a portion of the fuel can be stored at all times, and overflowing fuel can also be returned to the fuel tank 31 due to the drop. I can do it.

Further, an intake pipe 38 integrally attached to the wall 37 with the exhaust pipe 29 communicates with the air supply chamber 6, and a flame detection device 39 and a spark plug 40 are installed on the side wall of the combustion chamber 26.
An outlet pipe 42 is provided near the rotating body 19 via the electromagnetic valve 11 and communicates with the fuel supply pipe 41 .

The present invention is constructed as described above, and when the combustion starts, the heater 20 and the pump 33 are energized to preheat the burner section 21 and pump the fuel up to the level of the overflow pipe 34, but the fuel supply solenoid valve 11 is still closed. Therefore, the fuel flows out into the overflow pipe 34 and is returned to the fuel tank 31, while a portion remains in the reservoir 36.

Next, when the heater 20 heats the thermometer disposed at a proper position in the fuel scattering chamber 22, the motor 7 is activated, and the fan 5,
The rotating body 19, the scattering plate 18, and the rotating blade 17 rotate to remove gas remaining in the combustion chamber 26, and the spark plug 40
Then, the electromagnetic valve 11 is activated, and the fuel scattered and vaporized by the rotating body 19, the scattering plate 18, and the rotating blade 17 is ignited to start combustion.

Now, the pump 33, the supply pipe 41 and the fuel outlet pipe 4
When the pressure in the air communication pipe 35 due to the constriction at the tip of the pipe 2 and the fan 5 is constant at level L, and constant fuel is supplied from the tip of the outlet pipe 42 to perform steady combustion, gusts of wind, etc. If a headwind occurs, the pressure inside the combustion chamber 26 increases through the exhaust pipe 29, the combustion gas storage chamber 27, and the pipes 28, 28, and pressure is applied to the tip of the fuel outlet pipe 42, so that it flows toward the supply pipe 41 side. The fuel supply is suppressed and the level L attempts to rise by that amount, but the pressure due to the headwind is not only applied to the fuel outlet pipe 42, but is also added to the pressure of the fan 5 via the intake pipe 38, and is applied to the drive chamber 8. Since the fuel is also added to the air communication pipe 35, the rising fuel level is suppressed and has to remain constant at level L, and the fuel flowing out from the fuel outlet pipe 42 is no different from before the headwind occurred. It continues to burn stably.

Furthermore, an overflow pipe 34 branched from the pumping pipe 32
When the fuel in the fuel tank 31 decreases, the tip opening 34 opens.
A is opened to the air, but since a part of the fuel is stored in the storage part 36 formed by bending upward at a suitable point midway and folding back downward, pressure from the head wind is applied to the overflow pipe 24. is obstructed by the fuel, and even though some fuel level drops down to the mouth, it cannot escape to the fuel tank 31. Therefore, as described above, the level L of the pumping pipe 32 does not fluctuate, and stable combustion can be continued.

However, although the air communication pipe 35 communicates with the drive chamber 8, the same effect can be achieved even if the air communication pipe 35 communicates with the combustion chamber 26 or the intake pipe 38, where pressure fluctuations occur due to head wind.

As described above, according to the present invention, there is a fuel supply pipe that supplies fuel to the burner section through a solenoid valve to a fuel pumping pipe led out from the storage tank and equipped with a pump, and an intake pipe that is An air communication pipe that communicates with a point where pressure fluctuations occur through the oil storage tank is connected to an overflow pipe whose tip opening faces into the oil storage tank, and the oil is stored at a suitable location in the middle of the overflow pipe located outside the oil storage tank. Since the part is newly formed, not only can the fuel drawn up by the pump from the fuel pumping pipe when the solenoid valve is closed be returned to the oil storage tank through the overflow pipe, but also the opening at the tip of the overflow pipe is connected to the oil storage tank. Even if the inside is opened to the air, the pressure due to headwinds etc. will not escape from the overflow pipe, and a stable fuel supply can be performed at all times, allowing for stable combustion.

Furthermore, since the storage portion for preventing pressure from escaping from the overflow pipe is formed by bending the overflow pipe at a suitable point, the construction can be extremely simple.

[Brief explanation of the drawing]

Figure 1 is an overall schematic diagram of the embodiment of the present invention, Figures 2 and 3.
The figure is a partially enlarged sectional view, and FIG. 4 is an enlarged sectional view of the main part. 31... Fuel tank, 32... Pumping pipe, 34... Overflow pipe, 34 a.
...Tip opening, 35...Air communication pipe,
41...Fuel supply pipe.

Claims (1)

[Scope of utility model registration request] In a device that discharges combustion gas outdoors and supplies combustion air from the outdoors, a fuel supply pipe that supplies fuel to the burner section via a solenoid valve to a fuel pumping pipe that leads out from the oil storage tank and is equipped with a pump. , an air communication pipe whose other end communicates with a location where pressure fluctuations occur due to headwinds from outdoors, etc., and an overflow pipe whose tip opening faces into the oil storage tank, and an overflow pipe connected to the fuel pumping pipe. The communicating portion of the fuel supply pipe is located above the communicating portion of the fuel supply pipe to provide a fuel level between the two communicating portions, and the fuel storage portion is bent at an appropriate position in the middle of the overflow pipe located outside the oil storage tank. A liquid fuel combustion device characterized in that: