JPS584012Y2 - pot type burner - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a pot-type burner used in a liquid fuel combustion device.

Generally, in a pot burner, liquid fuel, such as melt oil, is supplied to the bottom of the burner body and is evaporated by raising it to almost the ignition point (approximately 250 degrees Celsius) of the melt oil using combustion heat. is supplied, mixed, and combusted.

Since the bottom of the burner body is cold at the time of ignition, fuel is supplied at a small flow rate using an oil flow regulator, and is allowed to soak into the ignition wick provided at the bottom of the burner body, which is then heated by the ignition heater. When the temperature reaches a point at which sufficient vaporization capacity can be obtained by ignition, the flow rate is switched to a strong flow rate.

In this case, if fuel is supplied at a strong flow rate from the beginning, the fuel will initially accumulate inside the burner due to lack of vaporization ability, and this will rapidly evaporate as the temperature rises, leading to a lack of combustion air and abnormal combustion.

Moreover, temporary abnormal combustion also occurs when fuel is supplied at a small flow rate to perform weak combustion as described above, and then switched to a strong flow rate after the burner temperature is sufficiently stabilized.

This is because during weak combustion, the entire burner does not burn, but burns only at the bottom of the burner body, so the temperature at the bottom of the burner body, that is, the fuel evaporation part, inevitably becomes higher than necessary. When fuel is supplied at a strong flow rate, a large amount of fuel evaporates instantly because the fuel spreads quickly.

As a result, as mentioned above, the combustion air becomes insufficient, resulting in abnormal combustion in which the flame spreads, soot is generated, and combustion noise is produced.

The purpose of this invention is to supply fuel at a strong flow rate from the time of ignition and to switch from weak combustion to strong combustion by providing a capillary structure material in the fuel evaporation section that reduces the spread of fuel and reduces evaporation. To provide a pot-type burner capable of smoothly shifting the thermal power without causing abnormal combustion even when the burner is heated.

An embodiment of the present invention will be described below with reference to the drawings.

In the figure, reference numeral 11 denotes a pot-type burner body, which is formed into a cylindrical shape with an open top and a bottom.Many air holes 12 and 13 are bored on the side wall almost all around the circumference, and the bottom An annular U-shaped groove 14 is formed therein.

A fuel supply pipe 16 is connected to this U-shaped groove 14, and is connected to a fuel tank (not shown) via a solenoid valve 17 for controlling fuel supply on/off and an oil amount regulator 18 for adjusting the amount of fuel supplied. Leads to.

Therefore, this U-shaped groove 14 becomes a fuel evaporation section, and a capillary structure material 20 is provided in this groove 14 to reduce the sudden spread of the supplied fuel.

As the capillary structure material 20, a material made of linear carbon fibers, metal fibers, etc., or a material such as asbestos or glass wool, which is heat resistant and easily penetrated by fuel, is used.

A combustion ring 22 is provided within the burner body 11 and is used for mixing and rectifying the vaporized gas and combustion air after evaporation.

Reference numeral 23 denotes an annular ignition wick made of asbestos cloth, etc., which is provided on the capillary structure material 20 and is connected to the ignition heater 24.
It is also used for ignition at the beginning of use.

Reference numeral 25 denotes a cover that surrounds the entire burner body 11, above which a combustion chamber 26 is formed, and below which covers the side wall and bottom surface of the burner body 11 with a gap maintained, and which blows air from the blower fan 28. An air guide path 29 is formed to guide air to the air holes 12.13.

Next, the action will be explained.

The fuel supply amount is set to a constant flow rate by the oil amount regulator 18,
By turning on the electromagnetic valve 17, fuel is supplied into the U-shaped groove 14 in the burner body 11, that is, into the fuel evaporation section.

The fuel supplied to the fuel evaporator first permeates the capillary structure 20 provided there by capillary action, then permeates the ignition wick 23 and is ignited by the ignition heater 24.

On the other hand, combustion air is blown by a blower fan 28, and is supplied into the burner body 11 through various air holes 12, 13 formed in the peripheral wall of the burner body 11 through an air guide path 29.

After the ignition operation, the temperature of the burner body 11 increases due to combustion heat, so the groove 14, which is a fuel evaporation part, formed on the bottom surface
As the temperature rises, the evaporation capacity gradually increases.

At this time, even if the temperature rises rapidly and the evaporation capacity increases, the capillary structure material 20 is provided in the groove 14, which is the fuel evaporation part, so that the evaporation of the fuel flowing there is moderated, so that the evaporation capacity is increased. It does not evaporate and cause abnormal combustion, and the combustion condition is stable.

Furthermore, even if weak combustion is continued and the bottom temperature of the burner body 11 is higher than necessary, for example, the ignition point of 250° C. or higher, switching to strong twist firing and supplying fuel at a strong flow rate, the capillary structure material 20 Since the evaporation of the fuel is alleviated, the combustion transitions smoothly without causing abnormal combustion.

As described above, according to the present invention, in a pot-type burner that evaporates liquid combustion supplied into the burner body using combustion heat, mixes it with combustion air, and burns it, the combustion evaporation section inside the burner body evaporates the liquid combustion supplied into the burner body. A capillary structure material is installed in a certain groove to alleviate fuel evaporation and prevent abnormal combustion due to rapid evaporation, so fuel can be supplied at a strong flow rate from the beginning at the time of ignition, eliminating the need for flow rate switching operations at the time of ignition. As the temperature increases, the rise of combustion also becomes faster.

Further, even when transitioning from weak combustion to strong twist firing, the transition can be made smoothly without causing abnormal combustion as in the conventional case.

[Brief explanation of the drawing]

The figure is a sectional view showing an embodiment of the pot-type burner according to the present invention. 11...Burner body, 12.13...Air hole, 14...Groove, 16...Liquid fuel supply pipe, 20... Capillary structure material, 23...
...Ignition wick.

Claims (1)

[Scope of utility model registration request] The liquid fuel supplied to the bottom of the burner body is evaporated by the heat of combustion, and this is mixed with combustion air supplied from the air holes provided in the peripheral wall of the burner body for combustion.
A groove is formed in the bottom of the burner body, a liquid fuel supply pipe is connected to this groove to form a fuel evaporation section, and a capillary structure material is packed and disposed in this fuel evaporation section, and a capillary structure material is placed on the capillary structure material. A pot-type burner characterized by having an ignition wick.