JPS6021611Y2 - liquid fuel combustion equipment - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a liquid fuel combustion device used for home heating, cooking, etc., and is intended to improve the safety and improve the combustion state of the device.

Light wick burners conventionally used in kerosene stoves and the like are low in noise, simple in construction, and easy to operate, but have a narrow combustion range.

In other words, the amount of heat generated by the wick burner can be varied by moving the wick up and down, and when the wick is raised, the vaporization area increases,
When the temperature of the wick increases, the amount of heat generated increases, and when the wick is lowered, the opposite phenomenon occurs: the amount of fuel vaporized decreases, and the amount of heat generated decreases.

However, the air that contributes to combustion is supplied to the combustion chamber by the thermal draft of the combustion tube, so even when the wick is lowered, the amount of air decreases is less than the amount of vaporized fuel, causing the air-fuel ratio to deteriorate. Large amounts of carbon monoxide, soot, and odors are generated.

In addition, when the combustion amount decreases, the flow velocity of combustion gas in the vaporization chamber slows down, and the cooling effect of the supplied air decreases, causing the temperature of the vaporization chamber and inner flame tube to rise, and tar is generated in the inner and outer flame pans. However, this tar prevented the wick from descending when extinguishing the fire, making it impossible to extinguish the fire, which was extremely dangerous.

The present invention eliminates these conventional drawbacks,
An embodiment of the present invention will be described below with reference to the drawings.

As shown in the drawing, a cylindrical vaporizing element 2 having a suction wick 1 at the bottom is exposed to a vaporizing chamber 5 composed of a cylindrical inner flame tube 3 and an outer flame tube 4 having a large number of air holes. There is.

Note that the lower part of the suction wick 1 is submerged in the fuel 7 of the fuel tank 6.

Further, the upper part of the inner flame cylinder 3 is closed by a disc-shaped cab 8 at a predetermined interval.

Further, a combustion chamber 10 is formed by a cylindrical combustion tube 9 above the inner and outer flame tubes 3 and 4.

A blower 12 is provided above the combustion chamber 10 via an ejector plate 11.

Also, from this blower 12, passing through the outer periphery of the ejector plate 11,
A wind barrel 14 communicating with the combustion tube 9 and reaching a louver 13 is configured.

Above, the combustion chamber 10 and the thoracic opening 14 are located at the lower peripheral edge of the combustion tube 9.
A plurality of air holes 15 are provided to communicate with each other.

Moreover, the inner flame cylinder 3 is provided closely on the inner fire pan 16.

Next, the operation will be explained.

Fuel 7 accumulated in the fuel tank 6 passes through the suction wick 1 and is supplied to the vaporization element 2.

When the blower 12 is rotated, air passes around the ejector plate 11 and flows to the louver 13.

At this time, the static pressure in the combustion chamber 10 becomes negative due to the air flow passing around the outer periphery of the ejector plate 11.

Therefore, air flows from the inner flame tube 3 and the outer flame tube 4 to the vaporization chamber 5, and exhaust gas is discharged from the louver 13.

The static pressure in the combustion chamber 10 is proportional to the amount of air flowing through the wind barrel 14 and is controlled by the rotation speed of the blower 12.

In addition, the amount of evaporation of fuel from the vaporization element 2 is
, 4 is proportional to the amount of air flowing in from the bottom.

That is, the amount of air flowing through the wind barrel 14 changes depending on the rotation speed of the blower 12, and the static pressure in the combustion chamber 10 changes in proportion to this. The amount of air flowing in from the outer flame tubes 3 and 4 changes, and the amount of fuel vaporized from the vaporization element 2 changes depending on this amount of air.

Therefore, by changing the rotation speed of the blower 12, the amount of air and the amount of fuel that contribute to combustion can be controlled simultaneously, and even if the amount of combustion is changed, the air-fuel ratio is kept balanced and a good combustion state can be maintained.

The air flowing in through the air holes 15 is forced by the flow of the blower 12, so the static pressure inside the wind barrel 14 is high, and a large amount of air is forced into the combustion chamber 9 through the air holes 15 provided in the combustion tube 9.

Further, since the combustion air is forcibly sucked in by the blower 12 and the ejector plate 11, the flow rate in the combustion chamber 10 and the vaporization chamber 5 is high, and mixing is promoted.

Therefore, the flame becomes a short blue flame premixed part, and air 15
The air flowing into the combustion chamber 10 without being involved in the flame
A part of the air passing through the wind barrel 14 is allowed to burn through the air holes 15 provided in the combustion tube 9 without passing through the vaporization chamber 5 or participating in the flame in the combustion chamber 10. Room 1
0 and is discharged to the wind cylinder 14 again.

Therefore, even when the amount of combustion is small, a large amount of air can be supplied into the combustion chamber 10 without disturbing the combustion state.

Therefore, no heat is accumulated in the combustion chamber 10, and even when the amount of combustion decreases, the temperature of the combustion chamber 10, combustion tube 9, carburetor 8, and inner flame tube 3 can be prevented from rising, and as a result, the vaporization element 2 maintains the amount of vaporization according to the amount of air and maintains a stable combustion state.

Furthermore, since the temperature increase in the inner flame tube 3 and the inner fire pan 16 is small, it is possible to prevent the fuel from turning into tar due to high temperature.

As described above, according to the present invention, the vaporization chamber and combustion chamber can be sufficiently cooled even when the combustion amount is small, so tar generation is eliminated, stability is increased, and good combustion conditions can be obtained. The combustion amount variable range has been expanded, and the amount of heat generated can be adjusted according to the load to save energy.

[Brief explanation of the drawing]

The drawing is a sectional view showing one embodiment of the liquid fuel combustion device of the present invention. 2... Vaporization element, 3... Inner flame tube, 4.
...Outer flame tube, 5...Vaporization chamber, 8...
...Cab, 9...Combustion tube, 10...
Combustion chamber, 15...Air vent.

Claims (1)

[Scope of utility model registration request] A vaporizing element for vaporizing fuel is provided in a vaporizing chamber configured between an inner flame tube and an outer flame tube, and in an upper part of the vaporization chamber,
A cylindrical combustion tube constitutes a combustion chamber, and an air blower is installed at the top of the combustion chamber via an ejector plate, and air flows from the blower through the outer circumference of the ejector plate, communicates with the combustion tube, and reaches the louver. A liquid fuel combustion device comprising a shell and having a plurality of air holes provided in a lower peripheral portion of the combustion tube to communicate the combustion chamber and the wind barrel.