JP2955245B2 - Vaporization combustion equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vaporization and combustion apparatus for vaporizing and burning liquid fuel.

[0002]

2. Description of the Related Art For example, in a vaporization combustion apparatus used in a conventional oil fan heater, a liquid fuel is introduced into a vaporizer for vaporization and combustion, and is evaporated by passing through a vaporizer heated to 250 ° C. to 400 ° C.・ We vaporize.

FIG. 5 shows an example of a vaporizing and burning apparatus for an oil fan heater. The kerosene 3 supplied from the cartridge tank 14 is kept at a constant oil level in the fuel tank 2, and the kerosene 3 is supplied to the vaporizer 5 through the oil supply pipe 4 by the electromagnetic pump 1. Since the vaporization chamber of the vaporizer 5 is heated to a high temperature by the vaporization heater 6, the supplied kerosene 3 evaporates.
It is vaporized and injected from the nozzle 8 to the burner 9, and the ignition device 1
It is ignited by 0 and burns.

The vaporizer 5 has a heat transfer body 5a (combustion heat recovery unit).
Is provided to recover the heat of combustion from the high-temperature burner 9 to heat the vaporizer 5 and reduce the power consumption of the vaporization heater 6. The temperature control of the vaporizer 5 is performed by controlling the vaporization heater 6 by detecting the temperature of a thermistor 18 attached to the vaporizer 5.

The vaporizer 5 is provided with an electromagnetic valve 12 for controlling the opening and closing of the nozzle 8 to control the combustion of vaporized gas. When the solenoid valve 12 is closed, the kerosene 3 fed into the vaporizer 5 is returned from the return pipe 13 to the fuel tank 2.

[0006]

FIG. 6 is an enlarged view of the carburetor 5 in the above oil fan heater. As shown, kerosene is supplied from an oil feed pipe 4 connected to an oil feed port 4a provided on the minus side of the vaporizer 5 and passes through a vaporizing element 7 made of a porous material in the vaporizer 5. It is vaporized and jetted from a nozzle 8 provided on the other side. The structure of the vaporizer 5 has the following problems.

[0007] The heat transfer body 5 _a to recover heat from the burner 9
Is located on the oil feed port 4a side of the vaporizer 5, the temperature distribution of the entire vaporizer is highest on one side of the vaporizer 5 having the oil feed port 4a,
When the other side of the nozzle 8 is in a low state and a deteriorated oil or the like is used as the kerosene 3, the oil supply port 4a side of the vaporizing element 7 which is a porous material, which is on the high temperature side, is clogged and combustion failure occurs. Easy to fall into.

Since the temperature of the oil supply port 4a provided on the minus side of the vaporizer 5 is the highest, the heat of the vaporizer 5 is
Low calorie (500-600)
(Kal / h) Kerosene supplied at the time of combustion is vaporized in the stainless steel pipe 19 of the oil supply pipe 4, and an intermittent sound (pulsation) is generated in synchronization with the oil supply cycle of the electromagnetic pump 1.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a carburetor which solves the conventional problems as described above and a carburetor with improved peripheral structure.

[0010]

SUMMARY OF THE INVENTION In order to solve the first problem, the present invention is to pump liquid fuel from a fuel tank.
Oil supply pipe and liquid fuel supplied through the oil supply pipe
Vaporizer with a vaporizing element, and injects vaporized fuel
Nozzle for firing and burner for burning injected fuel
And combustion heat for recovering the heat of the burner and heating the vaporizer
A vaporization combustion device comprising a recovery section;
Connect the oil feed pipe to the end and the other end of the vaporizer
The combustion heat recovery unit is connected to the upper part of the vaporizer, and the other end of the vaporizer
Is connected to the lower part of the nozzle. Also, keep the vaporizer horizontal
At the one end in the longitudinal direction of the vaporizing element.
Connect the oil feed pipe, and in the longitudinal direction of the vaporizing element
The injection nozzle and the combustion heat recovery unit are connected to the other end .

In order to solve the second problem, the present invention provides an oil supply pipe for pressure-feeding liquid fuel from a fuel tank;
The liquid fuel supplied through the oil supply pipe is vaporized by the vaporizing element.
A vaporizer that vaporizes and a nozzle that injects vaporized fuel
And a burner for burning the injected fuel; and
A combustion heat recovery unit that recovers heat and heats the vaporizer.
In one embodiment, the oil feed path is provided at one end of the vaporizer.
And the nozzle and the other end of the vaporizer.
And the combustion heat recovery unit, and further,
The connecting portion with the vaporizer has a double pipe structure,
You form an air gap between the inner pipe and the outer pipe.

According to the first aspect of the invention, a heat transfer body for recovering the combustion heat of the burner is provided on the nozzle side of the vaporizer.
By setting the temperature on the burner installation side of the vaporizer to be the highest and the oil supply port side to have a low temperature gradient, the supplied liquid fuel has a vaporization rate while passing through the vaporization element made of porous material in the vaporizer. As a result, the gas is completely vaporized on the nozzle side, and there is no problem such as clogging of fuel in the vaporizing element.

According to the structure of the second aspect of the present invention, the connecting portion between the vaporizer and the oil supply pipe has a heat insulating structure of a double pipe having a gap between the outer cylinder and the inner cylinder, so that vaporization is performed. The heat of the vessel is less likely to be transmitted to the oil supply pipe, and the adverse effect of the supplied liquid fuel being vaporized in the oil supply pipe can be prevented.

[0014]

Next, an embodiment of the present invention will be described with reference to the drawings. 1 to 4 show a specific example of a carburetor in which the present invention is applied to a vaporization and combustion device of an oil fan heater and a peripheral structure thereof. 1 is a plan view, FIG. 2 is a side view, FIG. 3 is a front view, FIG. 4 is an enlarged view of an oil supply port and a connection portion of an oil supply pipe, FIG. ) Is a cross-sectional view. It is to be noted that the same parts as those in the conventional example are denoted by the same reference numerals, and description thereof will be omitted.

In FIG. 1 to FIG. 3, the vaporizer 21 is disposed horizontally in the combustion device of the oil fan heater so that the passing direction of kerosene is substantially horizontal. The oil supply pipe 4 is connected to a connection pipe 20 provided at the oil supply port on the minus side of the vaporizer 21, and kerosene is supplied from the fuel tank 2 (see FIG. 5). Inside the vaporizer 21, a vaporizing element 24 formed by molding a porous material into a cylindrical shape is installed. The vaporizing element 24 is heated to 200 to 300 ° C. by a vaporizing heater 25 disposed on the surface of the vaporizer 21, and is fed. The kerosene is evaporated and vaporized. The temperature of the vaporizer 21 is detected by a thermistor 26 (FIG. 3) attached to the vaporizer 21, and is controlled by adjusting the amount of power supplied to the vaporizer heater 25.

The kerosene vaporized while passing through the vaporizer 21 is injected into the burner 9 (see FIG. 5) as a vaporized gas from a nozzle 23 provided on the other side of the vaporizer 21 and burns. A heat transfer body 22 projecting from the surface of the vaporizer 21 toward the burner 9 is provided above the nozzle 23, and recovers the heat of combustion of the burner 9 to heat the vaporizer 21. When the heating of the vaporizer 21 by the heat transfer body 22 is sufficient, the vaporization heater 25 is turned off to reduce the power consumption of the vaporization heater 25. Further, since the heat transfer body 22 is provided on the nozzle 23 side of the vaporizer 21, the temperature distribution of the vaporizer 21 has a higher temperature gradient on the nozzle side (other side) than on the oil supply port side (− side), and The vaporization speed is increased while the produced kerosene passes through the gas element 7 in the vaporizer 21, and is completely vaporized and injected near the nozzle 23.

As described above, the vaporizer 21 is provided with the vaporizer heater 25.
In this case, the temperature of the nozzle 23 is increased by the heat transfer body 22 at the same time as the temperature of the kerosene is increased. Also in this case, it is possible to prevent the vaporization element 24 from being clogged and to perform stable vaporization combustion.

The connecting pipe 20 is shown in FIGS.
As shown in FIG. 4 (b), an inner cylinder 29 having an outer peripheral portion formed in an elliptical shape is press-fitted into an outer cylinder 28 formed in a cylindrical shape as shown in an enlarged sectional view of FIG. A-A 'of a)
(The cross section as viewed in the direction of the arrow) As a heat insulating structure of a double pipe having a gap 30 between the inner and outer cylinders, the influence of the heat of the vaporizer 21 on the oil feed pipe 4 is prevented. Outer cylinder 28, inner cylinder 2
Numeral 9 is made of stainless steel, ceramic, or the like, to which heat is hardly transmitted, so that heat insulation is enhanced.

As described above, since the outer cylinder 28 and the inner cylinder 29 fixed to the carburetor 21 are in contact with each other with a small contact area and a heat insulating space, the heat of the carburetor 21 is hardly transmitted to the oil feed pipe 4. Therefore, it is possible to prevent kerosene from vaporizing in the oil supply pipe 4.

Conventionally, at the time of low calorie combustion with a small amount of oil supply, the vaporizer 2 is cooled more than the oil supply pipe 4 is cooled by kerosene.
The combustion noise synchronized with the oil supply cycle of the electromagnetic pump 1 (see FIG. 5) was generated because the heat conduction from the oil pump 1 increased and kerosene vaporized in the oil supply pipe 4. In the example, by employing a heat insulating structure at the connection between the oil feed pipe 4 and the carburetor 21 as described above, the inside of the inner cylinder 29 is reduced to 15 mm.
Since the temperature can be suppressed to 0 to 160 ° C., the kerosene is supplied to the vaporizer without being vaporized, and the generation of the periodic combustion noise as described above can be prevented.

[0021]

According to the first aspect of the present invention, since the present invention is configured as described above, the nozzle is formed by the combustion heat recovery unit.
It is not directly heated, and the heat of the combustion heat recovery section is transferred to the other end of the vaporizer.
It can be transmitted directly and efficiently heat the other end of the vaporizer.
The temperature at the other end (nozzle side) of the vaporizer
Since one end side (oil supply pipe side) is heated to a low temperature gradient, the liquid fuel to be supplied increases the vaporization rate while passing through the vaporizer, and is completely vaporized on the nozzle side. As described above, effective vaporization is performed by a wide range of vaporization heating and a temperature gradient in the vaporizer, so that even when deteriorated oil or the like is mixed, stable vaporization combustion without clogging of the vaporization element is performed.

According to the second aspect, the liquid fuel enters the vaporizer from the oil supply pipe side of the low-temperature vaporizer, flows slowly in the horizontal vaporizer, and is vaporized and injected at the high-temperature nozzle side. Therefore, even if the pressure of the liquid fuel is not uniform, stable vaporization is possible.

According to the third aspect, in the vaporizer, the liquid fuel flows into one end in the longitudinal direction of the vaporizing element via the oil feed pipe, and is injected from the injection nozzle at the other end in the longitudinal direction of the vaporizing element. Therefore, even when the temperature gradient of the vaporizing element becomes large and stable deteriorated oil or the like is mixed, stable vaporizing combustion without clogging of the vaporizing element is performed.

According to the fourth aspect, the connection between the vaporizer and the oil feed pipe is formed as a heat insulating structure by a double pipe, so that the heat of the vaporizer is hardly transmitted to the oil feed pipe. Occasionally, no periodic combustion noise is generated.

[Brief description of the drawings]

FIG. 1 is a plan view of a vaporizer of a vaporization combustion device according to an embodiment of the present invention.

FIG. 2 is a side view of a vaporizer of the vaporization combustion device according to the embodiment of the present invention.

FIG. 3 is a front view of a vaporizer of the vaporization combustion device according to the embodiment of the present invention.

FIG. 4 is an enlarged sectional view of a connection portion between the vaporizer and the oil supply pipe of the present invention.

FIG. 5 is a configuration diagram of a conventional evaporative combustion apparatus.

FIG. 6 is a side view of a carburetor of a conventional vaporization and combustion device.

[Explanation of symbols]

 2 Fuel Tank 4 Oil Feeding Pipe 9 Burner 20 Connection Pipe 21 Vaporizer 22 Heat Transfer Body (Combustion Heat Recovery Unit) 23 Nozzle 25 Vaporization Heater

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-4-49722 (JP, A) JP-A-4-76301 (JP, A) JP-A-2-54008 (JP, U) JP-A-6 24221 (JP, U) Japanese Utility Model 62-948 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) F23D 11/02 F23D 11/44

Claims (4)

(57) [Claims] An oil supply pipe for pressure-feeding liquid fuel from a fuel tank, a vaporizer for vaporizing the liquid fuel supplied through the oil supply pipe by a vaporizing element, a nozzle for injecting the vaporized fuel, and a nozzle for injecting the vaporized fuel. A burner that burns the burned fuel, and a combustion heat recovery unit that recovers heat from the burner and heats the vaporizer.Connecting the oil feed pipe to one end of the vaporizer, The combustion heat recovery section is connected to the upper end of the other side of the vaporizer,
A vaporized fuel device , wherein the nozzle is connected to a lower portion on the other end side of the gasifier. 2. The vaporized fuel device according to claim 1, wherein the vaporizer is provided horizontally. 3. The oil feed pipe is connected to one end of the vaporizing element in the longitudinal direction, and the injection nozzle and the combustion heat recovery unit are connected to the other end of the vaporizing element in the longitudinal direction.
The vaporized fuel device according to claim 1, wherein: 4. An oil feeder for pumping liquid fuel from a fuel tank.
The pipe and the liquid fuel supplied through the oil supply pipe are vaporized.
A vaporizer that is vaporized by the vaporizing element and injects the vaporized fuel
Nozzles, a burner for burning the injected fuel,
Combustion heat recovery unit that recovers heat from the burner and heats the vaporizer
In the vaporization and combustion apparatus, the oil feed pipe is connected to one end of the vaporizer , and
Connect the nozzle and the combustion heat recovery unit to the other end of the vaporizer
And, further, the oil feeding the connection portion of the pipe and the carburetor to a double pipe structure, vaporization combustion device you and forming a gap between the inner pipe and the outer pipe of the double pipe.