JP2002267150A - Liquid fuel combustor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress the occurrence of executor noise by lessening the temperature difference between vaporized gas and primary air with simple structure, in a liquid fuel combustor for an oil fan heater, etc. SOLUTION: To form a circulation passage 23 for circulating primary air to a burner 9, a ventilation cover 16 is provided to cover a carburetor cover 15, and an inlet for primary air in this ventilation cover 16 is opened on the blast passage made of a blast fan 19 and a combustion chamber 18 around a burner base 14, so the primary air circulates in and around a hot combustion chamber 18, the hot burner base 14, and a hot carburetor cover 15, whereby it is sucked into a mixing pipe 12, being heated efficiently, so the temperature difference at mixing of vaporized gas and primary air becomes small.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid fuel combustion apparatus for vaporizing and ejecting liquid fuel in a combustion hot air heater such as an oil fan heater.

[0002]

2. Description of the Related Art In a conventional liquid fuel combustion apparatus, first, as shown in FIG. 3, fuel is supplied from a cartridge tank 5 to a tank 2, and the fuel stored in the tank 2 is vaporized by an electromagnetic pump 4 into a carburetor 6. The gas is vaporized by the heating of the vaporizer heater 8 and is ejected from the nozzle 10 to the mixing pipe 12 of the burner 9.

At this time, the vaporized gas ejected from the nozzle 10 is mixed in the mixing pipe 12 while sucking the primary air by the ejector effect, and the mixed gas is ejected from the flame network 11 of the burner 9 and the ignition device (Not shown) and is ignited and burned. The combustion gas generated at this time is guided above a combustion chamber 18 disposed so as to cover the periphery of the burner 9, mixed with the indoor air sucked by the blower fan 19, and exhausted into the room as warm air. .

The vaporizer 6 has a heat recovery rod 13, a vaporizer heater 8 for heating and vaporizing fuel, a vaporizer temperature detecting means 21 for detecting the temperature of the vaporizer 6, and a vaporized gas. It has a nozzle 10 and the tip of the heat recovery rod 13 is located above the burner 9 and is exposed to a combustion flame 25 formed by the burner 9 to recover the combustion heat and recover the recovered heat. The heat is transmitted to the vaporizer 6 together with the heat of the vaporizer heater 8, and the power consumption of the vaporizer heater 8 is reduced.

[0005] Here, a flow passage 23 for circulating the primary air to the mixing pipe 12 of the burner 9 is formed by providing a ventilation cover 16 so as to cover a lower portion of the burner 9 except for the vaporizer 6 on the nozzle 10 side. An inlet 24 for the primary air is provided on the bottom surface of the ventilation cover 16, and a part of the air from the blower fan 19 is taken into the inlet 24.

[0006]

However, in the above-described conventional configuration, when the vaporized gas ejected from the nozzle 10 and the primary air are mixed, the temperature of the vaporized gas vaporized by heating the liquid fuel and the flow The temperature difference between the primary air flowing into the ventilation cover 16 from the inlet 24 and the temperature of the primary air is too large, which causes a problem that an ejector noise is generated when the vaporized gas and the primary air are mixed. .

In order to solve this problem, as in a liquid fuel combustion apparatus disclosed in Japanese Patent Application Laid-Open No. Hei 5-272713, a heat exchanger that receives heat from a carburetor to heat the primary air around a nozzle is provided. Has been proposed,
Although this solves the above-mentioned problem, the heat of the vaporizer is transferred to the heat exchanger to heat the primary air, so that the temperature of the vaporizer decreases, as well as being discharged from the upper part of the combustion chamber. There is a need to provide a means for sending primary air to the periphery of the nozzle while reheating a part of the combustion heat on the side wall of the combustion chamber.

[0008]

SUMMARY OF THE INVENTION The present invention provides a tank for storing a liquid fuel, an electromagnetic pump for sucking the fuel from the tank, a vaporizer for vaporizing the fuel supplied by the electromagnetic pump, and a vaporized gas. A burner that burns a mixed gas with the primary air, a nozzle that is provided in a part of the vaporizer and that blows out the vaporized gas, a flame network that is provided above the burner and that discharges the mixed gas, Pipe, into which a vaporized gas and primary air flow, a vaporizer cover provided to cover the vaporizer, a burner base for fixing the burner, and a combustion chamber provided to cover the burner. In the liquid fuel combustion device, in order to form a flow passage for circulating the primary air to the burner, a ventilation cover is provided so as to cover the carburetor cover with a gap, and an inlet for the primary air in the flow passage is provided. To constitute a liquid fuel combustion apparatus is characterized in that opened on the air passage formed between the wall and the blower fan of the combustion chamber at the periphery of the Nabesu.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The operation of a liquid fuel combustion apparatus according to one embodiment of the present invention will be described with reference to FIGS.

FIG. 1 is a sectional view of a main part of a liquid fuel combustion apparatus according to an embodiment of the present invention. FIG. 2 is a sectional view of a liquid fuel combustion apparatus according to one embodiment of the present invention.

Reference numeral 1 denotes a main body of an oil fan heater having a liquid fuel combustion device. Reference numeral 2 denotes a tank for storing kerosene installed on the lower side in the main body 1. Reference numeral 3 denotes an oil supply pipe through which kerosene flows. Reference numeral 4 denotes an electromagnetic pump connected to one end of the oil feed pipe 3 and provided on the upper part of the tank 2. 5
Is a cartridge tank which is detachably mounted on the upper part of the tank 2. Reference numeral 6 denotes a vaporizer to which the other end of the oil feed pipe 3 is connected, and which vaporizes the supplied kerosene.

The vaporizer 6 includes a vaporizer temperature detecting means 21 for detecting a temperature, a vaporizer heater 8 for keeping the vaporizer 6 at a predetermined temperature based on an output from the vaporizer temperature detecting means 21, and a vaporizer. A nozzle 10 for ejecting gas is provided.

Reference numeral 9 denotes a burner for burning a mixed gas of a vaporized gas and primary air. Reference numeral 11 denotes a flame hole network provided above the burner 9 for discharging the mixed gas. Reference numeral 12 denotes a mixing pipe provided at a lower portion of the burner 9 and into which vaporized gas ejected from the nozzle 10 and primary air flow.

Reference numeral 13 denotes a heat recovery rod provided above the flame hole network 11 for recovering the heat of the burner 12 and heating the vaporization chamber inside the vaporizer 6. Reference numeral 14 denotes a burner base for fixing the heat recovery rod 13 and the burner 9.

Reference numeral 15 denotes a carburetor cover provided so as to cover the carburetor 6 with the burner base 14. Reference numeral 16 denotes a ventilation cover provided so as to cover the vaporizer cover 15 and through which primary air flows.

A combustion chamber 18 covers the burner 9 and guides the combustion gas upward. Reference numeral 19 denotes a blower fan provided at the back of the combustion chamber 18 to take in room air. Reference numeral 20 denotes an outer duct that covers the combustion chamber 18 and mixes the combustion gas with the room air to generate hot air. 21 is a vaporizer temperature detecting means for detecting the temperature of the vaporizer 6. Reference numeral 22 denotes an operation unit for instructing the operation of the oil fan heater. Reference numeral 23 denotes a flow passage formed by the vaporizer cover 15 and the ventilation cover 16 for supplying primary air into the mixing pipe 12.

Reference numeral 26 denotes an inlet for the primary air in the flow passage 23, and a blower fan 19 around the burner base 14.
And a wall of the combustion chamber 18 on the ventilation passage.

In such a configuration, first, fuel is supplied from the cartridge tank 5 to the tank 2,
The fuel stored in the oil supply pipe 5 by the electromagnetic pump 4
It passes through the inside and is sent to the vaporizer 6. The sent fuel is vaporized in the vaporizer 6 maintained at a predetermined temperature or higher by the heater 8,
The vaporized gas is ejected from the nozzle 10. At that time, the vaporized gas is mixed in a mixing pipe 12 provided on the downstream side of the vaporizer 6 while sucking primary air by an ejector effect, and the mixed gas is discharged from a flame hole network 11 and burned.

At this time, the primary air inlet 24 in the ventilation cover 16 is provided on a ventilation passage formed by the ventilation fan 19 and the wall surface of the combustion chamber 18 around the burner base 14, so that the ventilation fan First, the room air sucked in 19 is further heated by passing through the high-temperature burner base 14 while being transferred from the wall of the high-temperature combustion chamber 18, and is heated around the wall of the high-temperature vaporizer cover 15. Is further heated more efficiently and is sucked into the mixing pipe 12, so that the temperature difference at the time of mixing the vaporized gas and the primary air becomes small, and the vaporized gas enters the mixing pipe 12 from the nozzle 10. It is possible to suppress the generation of ejector noise when ejecting.

[0020]

As described above, according to the present invention, in the liquid fuel combustion apparatus, a ventilation cover is provided so as to cover the carburetor cover in order to form a flow passage for circulating the primary air to the burner. Since the primary air inlet was opened on the air passage formed by the blower fan and the combustion chamber around the burner base, the primary air was supplied to the hot combustion chamber, the hot burner base, and the hot carburetor cover. By flowing around the periphery, it is heated efficiently and the mixing tube 1
2, the difference in temperature between the vaporized gas flowing into the mixing pipe and the primary air during mixing is reduced, and the generation of ejector noise when the vaporized gas is ejected from the nozzle 10 into the mixing pipe 12 is simplified. Can be suppressed by a simple structure.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of a liquid fuel combustion device according to an embodiment of the present invention.

FIG. 2 is a side sectional view of a hot air heater using the liquid fuel combustion device according to one embodiment of the present invention.

FIG. 3 is a cross-sectional view of a hot air heater using a liquid fuel combustion device in a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body 4 Electromagnetic pump 6 Vaporizer 8 Vaporizer heater 9 Burner 10 Nozzle 12 Mixing tube 14 Burner base 15 Vaporizer cover 16 Ventilation cover 18 Combustion chamber 19 Ventilation fan 23 Primary air passage 24 Inflow port

Claims (1)

[Claims] 1. A tank (2) for storing a liquid fuel, and an electromagnetic pump (4) for sucking the fuel from the tank (2).
A vaporizer (6) for vaporizing the fuel supplied by the electromagnetic pump (4); a nozzle (10) provided in a part of the vaporizer (6) for ejecting vaporized gas; A mixing pipe (12) into which vaporized gas and primary air ejected from 10) flow, a burner (9) for burning a mixed gas of vaporized gas and primary air, and a cover for covering the vaporizer (6). A provided carburetor cover (15), a burner base (14) for fixing the burner (9), a combustion chamber (18) provided so as to cover the burner (9), and the combustion chamber (18). In the liquid fuel combustion device comprising a blower fan (19) provided on the back surface of the burner (9) for taking in indoor air, vaporization is performed to form a flow passage (23) through which primary air flows to the burner (9). Ventilation cover so as to cover the container cover (15). Chromatography (16) is provided, wherein the flow passage (2
3) that the inlet (24) of the primary air is opened on a ventilation passage formed by a wall of the combustion chamber (18) and a ventilation fan (19) around the burner base (14). Characteristic liquid fuel combustion device.