JPS605216Y2 - liquid fuel combustion equipment - Google Patents

Description

[Detailed description of the invention] This invention is a device with a relatively low calorific value used in oil stoves, oil heaters, etc., which atomizes liquid fuel and sends it to the vaporization chamber together with air. The present invention relates to a vaporization premix combustion device that burns an air-fuel mixture at a flame port.

The liquid fuel combustion device of the present invention supplies fuel onto a rotating plate that rotates in an atomizing container, and selects a portion of the atomized fuel emitted from the entire periphery of the rotating plate using a fuel damper. The atomized fuel and air are supplied to the vaporization chamber from separate passages in the same direction and in parallel by adjusting the amount of air supplied from the blower to the vaporization chamber using an air damper. be.

Therefore, the heating power can be easily adjusted, the air-fuel ratio can always be maintained at the optimum level, and stable complete combustion can be obtained, and minute combustion can be stabilized, so that the heating power adjustment range can be widened.

However, in addition to those in which the atomized fuel passes through the opening of the fuel damper and effectively reaches the vaporization chamber, there are also those in which the atomized fuel loses its kinetic force midway through and adheres to the communication connection between the atomization container and the vaporization chamber, or Fuel that is not to be controlled, such as fuel that is diffusely reflected inside, passes through the opening, and adheres to the communication connection part, flows into the vaporization chamber, disturbs the air-fuel ratio, and generates an abnormal flame.

Furthermore, if there is a malfunction in the temperature control of the vaporization heater, fuel will remain in the vaporization chamber, causing problems such as abnormal combustion and raw tar.

The present invention aims to improve the illumination point as described above, and will be explained below with reference to the drawings.

Figures 1 to 2A show a liquid fuel combustion device prior to the present invention, with Figure 1 being a longitudinal sectional view thereof, Figure 2 being a cross sectional view of the atomization container and vaporization chamber, and Figure 2A. In the same cross-sectional view, the outlet of the atomization container 1 is divided into a fuel passage 2a and an air passage 2b, and the heat insulating member 5 that connects the atomization container 1 to the vaporization chamber 3 has a fuel passage window 5a and an air passage window 5b. are formed and correspond to the fuel passages and air passages described above.

Reference numeral 6 denotes a fuel damper inscribed in the atomization container 1, and when the adjustment lever 6a is rotated, the degree of opening of the opening 7 is changed.

A rotary shaft 9 directly connected to the rotary plate 8 passes through the bottom of the atomizing container to form a gap 10a, and an air chamber 10 therebelow communicates with the air passage 2b.

A fan 11, a motor 12, a sub-tank 13, and an oil pump 14 are connected under the atomization container 1, and the rotating plate 8, fan 11, and oil pump 14 are all directly connected to the rotating shaft 9,
is driven by.

The sub-tank 13 is connected to the oil leveler 1.
5 to always maintain a constant oil level.

Oil supply pipe 16 connected to the discharge port of oil pump 14
penetrates the atomization container 1 and opens above the rotating plate 8.

The bottom of the atomization container 1 and the sub-tank 13 are connected to the drain pipe 1
7 for communication.

The burner body 18 forms a flame port 20 with the burner cap 19, and a mixing chamber 22 and a vaporizing chamber 3 are separated by a mixing partition plate 21.
23 is a vaporization heater.

The amount of air discharged from the fan case 24 changes by the rotation of an air damper 26 which is elastically contacted by a spring 25, and 27 is an interlocking piece between the air damper and the fuel damper 6.

To describe the operation of this combustion device, firstly, when the vaporization heater 23 is energized and the burner body 18 reaches the appropriate temperature, then when the motor 12 is driven, the fuel is poured from the open end of the fuel supply pipe 16 onto the rotary plate 8. The atomized fuel flows down at a constant rate and radiates as atomized fuel from the entire periphery of the rotary plate 8 in the tangential direction.

If the fuel damper 6 is opened appropriately, a part of the radiant fuel that has passed through the damper 6 enters the vaporization chamber 3 and generates vaporized fuel.

The remaining atomized fuel blocked by the fuel damper 6 collides with the inner wall of the atomization container 1 to form an oil film, flows downward, passes through the drain pipe 17, and returns to the sub-tank 13.

At the same time, air discharged from the fan 11 and moderated by the air damper 26 is supplied from the air chamber 10 to the vaporization chamber 3 through the air passage 2b and the air passage window 5b.

The vaporized fuel and air in the vaporization chamber are separated by a mixing partition plate 21 and a mixing chamber 2.
2, the mixture is well mixed and ejected from the flame port 20, so that when it is ignited, combustion begins immediately.

By operating the adjustment lever 6a, the fuel damper 6 and the air damper 26 communicate with each other to change the degree of opening, making it easy to adjust the heating power and always achieve complete combustion at the optimum air-fuel ratio.

Further, since a part of the fuel supplied to the atomization container 1 at a continuous constant flow rate is selectively sent to the vaporization chamber 3 for combustion, minute combustion can be stabilized and the range of thermal power adjustment can be widened.

However, as mentioned above, fuel that is not to be controlled may adhere to the communication connection or remain in the vaporization chamber, resulting in abnormal flames and tar formation.

Next, to explain an embodiment of the present invention, FIG. 3 is a longitudinal cross-sectional view of the atomization container and the vaporization chamber, FIGS. 3A and 3B are partial cross-sectional views, and FIG. 4 is a cross-sectional view of the same. Fig. 5 is a perspective view of the fuel damper, Fig. 6 is a perspective view of the atomization container, Fig. 7 is a perspective view of the same as seen from below, and Fig. 8 is a perspective view of the heat insulating member. The bottom surface is inclined from the vaporization chamber side to the atomization container side, and a fuel passage window 5'a, an air passage window 5'b, and a weir 5' are provided on the end face.
c and an oil passage groove 5'd.

The return oil groove 1a formed at the bottom of the atomization container 1 communicates with the drain pipe 17, and the vertical groove 2c dug down at the part where the fuel passage 2a contacts the oil passage groove 5'd is the return oil groove 1a. communicate with.

The effect of this embodiment is that when fuel that is not to be controlled adheres to the heat insulating member 5', it flows along the slope of the bottom surface toward the atomization container, and flows through the oil passage 5'a, the vertical groove 2c, and the oil return groove. 1a, the water is returned to the sub-tank 13 through the drain pipe 17.

Further, even when fuel remains in the vaporization chamber 13, it easily flows back to the sub-tank 13 through the heat insulating member 5', as described above.

More specifically, the fuel flowing at the bottom of the heat insulating member 5' is connected to the weir 5'.
Since fuel does not collect in the air passage 1i5'd and cross the air passage window 5'b due to c, the fuel does not enter the fan 11,
No leakage to the outside.

As described above, according to the present invention, even when uncontrolled fuel adheres to the heat insulating member or accumulates in the vaporization chamber, it is easily returned to the sub-tank, and no fuel leaks to the fan or the outside. Abnormal flame generation and fuel leakage can be prevented without disturbing control of combustion amount and air-fuel ratio.

[Brief explanation of the drawing]

Figure 1 is a longitudinal cross-sectional view of a liquid fuel combustion device prior to the present invention, Figure 2 a is a cross-sectional view of the atomization container and vaporization chamber, Figure 2 is a partial cross-sectional view of the same, Figure 3 a 3 is a longitudinal sectional view of an atomizing container and a vaporizing chamber showing an embodiment of the present invention, FIG. 3b1 is a partial sectional view of the same, FIG.
FIG. 6 is a perspective view of the fuel damper, FIG. 6 is a perspective view of the atomization container, FIG. 7 is a perspective view of the same as seen from below, and FIG. 8 is a perspective view of the heat insulating member. 1... Atomization container, 1a... Return oil groove, 2
a... fuel passage, 2b... air passage,
2c... vertical groove, 3... vaporization chamber, 5,5
'...Insulation member, 5a, 5'a...Fuel passing window, 5b, 5'b...Air passing window, 5
'c...Weir, 5'd... Oil passage groove, 6.
... Fuel damper, 6a ... Adjustment lever, 7 ... Opening, 8 ... Rotating plate, 9.
... Rotating shaft, 10 ... Air chamber, 16 ...
... Oil supply pipe, 17 ... Drain pipe,
26...Air damper

Claims (1)

[Scope of utility model registration request] The liquid fuel flows down into a rotating plate installed in the atomization container, and a part of the atomized fuel emitted from the entire periphery of the rotating plate is selectively sent to the vaporization chamber by a fuel damper, and a supply port other than the above is provided. Adjust the amount of air sent from the tank to the vaporization chamber using an air damper.
Air and atomized fuel are fed into the vaporization chamber in the same direction in parallel, and the bottom surface of the insulation member that communicates the atomization container and the vaporization chamber is inclined toward the atomization container side, and a weir is formed on the end surface. , characterized in that an air passage and a fuel passage are formed above the weir, and the fuel accumulated in the heat insulating member is fed back to the atomization container through an oil passage groove formed in a cut in the weir. liquid fuel combustion equipment.