JPH0749217Y2 - Evaporative combustion equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial field of application) The present invention supplies a liquid fuel to a vaporizer, vaporizes the liquid fuel in the vaporizer, and supplies the vaporized gas to a burner. The present invention relates to a vaporization type combustion instrument such as an oil fan heater for burning, a forced supply / exhaust type oil warm air heater and the like.

(Prior Art) In a conventional vaporization-type combustion instrument, a vaporizer having a vaporization heater is provided with a nozzle having a needle shaft, the vaporizer is preheated by the vaporization heater, and oil is fed after reaching a predetermined vaporizable temperature. The pump is driven, the liquid fuel in the fuel reservoir is sequentially supplied to the vaporizer through the fuel supply path, the supplied liquid fuel is vaporized by the heat of the vaporization heater, and the vaporized gas is burned from the nozzle together with the combustion air by the burner. The combustion amount is increased and decreased by increasing and decreasing the amount of liquid fuel sent from the oil feed pump. When the fire is extinguished, the fuel inside the carburetor returns to the fuel storage section through the fuel return path.

(Problems to be Solved by the Invention) In the above-mentioned conventional technique, the amount of liquid fuel is adjusted to adjust the amount of combustion. However, if the amount of combustion is extremely decreased, the ejection speed of vaporized gas from the nozzle decreases. Then, the fuel supply at the burner burner part does not follow the combustion speed, which causes a so-called flashback (flashback) phenomenon, so if the maximum combustion amount was 100%, the minimum combustion amount could only be reduced to about 30%. . For this reason, when the temperature is relatively warm in early spring or autumn, the indoor space becomes too hot even with the minimum amount of combustion.

As one means to solve such a problem, there is an ON-OFF control that extinguishes when the room temperature rises above a certain temperature and ignites when it falls below a certain temperature.
The ON-OFF control has a problem that an odor is generated at each ignition / extinction.

If a pair of nozzles equipped with a needle valve corresponding to a needle shaft is connected to a vaporizer and burners are installed corresponding to these nozzles, as in Japanese Utility Model Laid-Open No. 48-729, combustion of both burners will occur. It is possible to set the combustion variable range to a large value by switching between the strong combustion state due to and the weak combustion state due to the combustion of only one burner. However, since this is a configuration in which burners having substantially the same shape are simply arranged in parallel, when one of the burners is provided with an ignition plug, one of the burner flame openings provided with the ignition plug is connected to the ignition plug. It is difficult to reliably transfer the flame to the other burner flame mouth portion where the other burner is not provided, and unless the ignition plug is provided for each burner, the other burner may not ignite.

An object of the present invention is to solve the above-mentioned problems and to provide a vaporization type combustion instrument that secures the transfer of heat between burners to reduce the number of parts, reduces the generation of odor, and expands the variable range of heating power. And

[Configuration of the Invention] (Means for Solving the Problem) The present invention is to supply liquid fuel in a fuel reservoir to a vaporizer by a pump, vaporize the liquid fuel in the vaporizer, and vaporize the vaporized gas to a burner. In a vaporization-type combustion instrument configured to guide and burn, and the fuel in the vaporizer returns to the fuel reservoir through the fuel return path when extinguished, the vaporizer is inclinedly arranged, and needle shafts are respectively attached to the vaporizers. The first and second nozzles provided are connected to each other, and the first burner and the second burner are provided so as to be capable of performing the fire transfer corresponding to the first and second nozzles, and the second burner A second burner flame port is disposed above the first burner flame port of the first burner, and a fuel return path is connected to the first nozzle.

(Operation) Combustion can be made to be a strong combustion by opening the first and second nozzles by both needle shafts.
A weak combustion state can be achieved by opening only the nozzle of No. 2 by the needle shaft. Further, since the second burner flame nozzle portion formed in the second burner is arranged higher than the first burner flame nozzle portion formed in the first burner, the flame from the first burner flame nozzle portion is formed. Can be reliably transferred to the second burner flame tip.

(Embodiment) Next, an embodiment of the present invention will be described with reference to the accompanying drawings.

Reference numeral 1 denotes an oil receiving tray having a closed structure as a fuel reservoir, and a cartridge type oil tank (not shown) for supplying a liquid fuel A such as kerosene is placed on top of the oil receiving tray in an inverted state to maintain a constant liquid level. It has become so. Reference numeral 2 denotes an electromagnetic type oil feeding pump fixed on the oil receiving tray 1, the suction side of which is immersed in the liquid fuel A in the oil receiving tray 1. An oil supply pipe 3 has one end connected to the discharge side of the oil feed pump 2 and the other end connected to the carburetor 4, and supplies the liquid fuel A to the carburetor 4.
The carburetor 4 is provided horizontally, and the carburetor 4 is formed of a tubular aluminum die-cast substrate, is provided with a vaporization heater 5 such as a sheath heater, and detects the vaporizable temperature (thermistor). (Not shown). Reference numeral 6 denotes a first nozzle pipe that communicates with the upper end of the vaporizer 4, and causes the vaporized gas sent from the vaporizer 4 to be ejected from the first nozzle 7 at the tip of the vaporized gas.
A return port 9 communicating with a fuel return path 8 connected to the oil pan 1 is provided on the opposite side of the nozzle 7. Reference numeral 10 is a first needle shaft that is provided so as to be able to advance and retreat in the first nozzle tube 6 by disconnection of electricity to a first solenoid 11 that is a first opening / closing device. When the fire is extinguished, the first nozzle 7 is closed and the return port 9 is opened during the fire extinguishing, and the vaporized gas in the vaporizer 4 due to the residual heat after the extinguishing is oiled through the fuel return passage 8. The impurities adhering to the first nozzle 7 are removed by returning to the tray 1 and opening and closing. Reference numeral 12 denotes a first burner, and the opening 13A of the first burner throat portion 13 is opposed to the first nozzle 7 of the first nozzle pipe 6 with a space therebetween, and vaporized from the first nozzle 7. The primary air for combustion is sucked by the gas, and both are mixed and burned at the first burner flame port 14. 15 is the first burner flame opening 14
It is a spark plug provided in. Reference numeral 16 is a second nozzle pipe having a second nozzle 17, and the second nozzle pipe 16 is connected to the first nozzle pipe 6 through a communication passage 18 and serves as a second opening / closing device. A second needle shaft 20 is provided so as to be able to move forward and backward in the second nozzle tube 16 by turning on and off the second solenoid 19, so that the second nozzle 17 can be opened to eject the vaporized gas. There is. 21 is the second nozzle tube
16 is a second burner in which the opening 22A of the second burner throat portion 22 is spaced apart and opposed to the second nozzle 17 of the sixteen, and the second burner 21 is provided in parallel with the first burner 12. The second burner flame port 23 is arranged in the upper stage in the vicinity of the first burner flame port 14 of the first burner 12 so that the fire transfer is possible. The opening area of the second nozzle 17 of the second nozzle tube 16 is larger than the opening area of the first nozzle 7 of the first nozzle tube 6, and the second burner
The opening areas of the second burner flame mouth portion 23 and the second burner throat portion 22 of 21 are larger than the opening areas of the first burner flame mouth portion 14 and the first burner throat portion 13 of the first burner 12. Then, the fuel amount on the second burner 21 side is adjusted to the first burner.
It can be made larger than the fuel amount of 12. The first nozzle 7 is provided on the lower side of the carburetor 4 than the second nozzle 17. Incidentally, 24 is a frame sensor.

Next, the operation of the above configuration will be described.

First, when the power switch (not shown) is turned on to start the operation, the vaporization heater 5 is energized to start heating the vaporizer 4. Then, the temperature of the carburetor 4 from the thermistor is detected,
When it is detected that the vaporizer 4 has reached the predetermined vaporizable temperature of the liquid fuel A, the oil feed pump 2 and the spark plug 15 are energized. Then, the liquid fuel A is sucked by the oil feed pump 2 and supplied to the vaporizer 4, and in the vaporizer 4, the liquid fuel A
Is heated and vaporized. Then, the vaporized gas passes through the inside of the first nozzle pipe 6 in which the first needle shaft 10 is retracted by the first solenoid 11 and the first nozzle 7
Is ejected to the first burner throat section 13 of the burner 12.
At the same time, the first burner is driven by the momentum of this vaporized gas.
Combustion air is drawn into the first burner throat portion 13 of 12 and the vaporized gas mixed with this combustion air is mixed with the first burner.
Twelve first burner flame outlets 14 are blown out, which are ignited by the operation of the spark plug 15 and combustion is started in the first burner 12. Further, the second needle shaft 20 retracts to open the second nozzle 17, and the vaporized gas in the vaporizer 4 is supplied to the second nozzle pipe 16 through the communication passage 18 and ejected from the second nozzle 17. The vaporized gas ejected from the second burner flame port portion 23 is ignited by the transfer of the flame of the first burner 12 and combustion is started to be in a strong combustion state.
The combustion amount of the first and second burners 12, 21 can be adjusted in a strong combustion state by adjusting the amount of the liquid fuel A sent from the oil pump 2.

Next, in order to bring the combustion state to the minimum combustion amount or less in the strong combustion state, the second solenoid is controlled by the control device (not shown).
19 and actuate the second needle shaft 20 to the second nozzle
By closing 17 the ejection of vaporized gas from the second nozzle 17 is stopped to extinguish the fire. For this reason the first burner 12
Only the combustion state continues and becomes a weak combustion state. Then, by adjusting the amount of the liquid fuel A sent by the oil feed pump 2, the combustion amount of the first burner 12 can be adjusted in a weak combustion state. The first nozzle is replaced with the second nozzle tube 16.
The first nozzle 7 of the nozzle tube 6 may be closed by the first needle shaft 10 and only the second burner 21 may bring about the weak combustion state.

Thereafter, the first and second needle shafts 10 and 20 close the first and second nozzles 7 and 17 to extinguish the fire. At the same time, the return port 9 opens and the fuel in the carburetor 4 returns to the fuel. It is adapted to return to the oil pan 1 via the passage 8.

As described above, in the above embodiment, the first nozzle pipe 6 is connected to the vaporizer 4, and the first burner 12 is opposed to the first nozzle 7 of the first nozzle pipe 6, and The second nozzle pipe 16 is connected to the first nozzle pipe 6 via the communication passage 18, and the second nozzle pipe 16 is connected to the second nozzle pipe 16.
The second burner 21 is made to face the nozzle 17 of No. 1 and the strong combustion state by the combustion of the first and second burners 12, 21 is switched to the weak combustion state by only the first burner 12 or the second burner 21. As a result, the combustion movable width can be set large. For example, the combustion amount on the first burner 12 side is
The combustion amount on the second burner 21 side is set to 100 to 100 Kcal / h.
0 to 3000 Kcal / h, 4000 Kcal / h at the time of strong combustion
It becomes a combustion state of, and at the time of weak combustion, it becomes a combustion state of 500 Kcal / h minimum, and it is possible to set a large variable range of thermal power.

Further, by providing the ignition plug 15 in the first burner 12 and setting the second burner flame port 23 of the second burner 21 higher than the first burner flame port 14 of the first burner 12, Since the flame of the first burner 12 can be reliably transferred and the second burner 21 side can be ignited, it is not necessary to provide a separate spark plug for the second burner 21, and the cost can be reduced. Since the liquid fuel can be supplied to the first and second nozzle pipes 6 and 16 connected via 18 by one oil feed pump 2, the number of parts can be reduced.

The present invention is not limited to the above-described embodiment, and for example, in the above-mentioned embodiment, the nozzle position of the carburetor is moved up and down relatively according to the height of the flame mouth, but the nozzle mounting position for the carburetor is the same. Various modifications are possible such that the entire carburetor may be disposed in a tilted position and the burners may have different sizes so that the heights of the nozzles may be equalized to improve manufacturability. .

[Advantage of the Invention] The present invention supplies liquid fuel in a fuel reservoir to a vaporizer by a pump, vaporizes the liquid fuel in the vaporizer, guides the vaporized gas to a burner and burns the vaporizer, and the vaporizer during digestion. A vaporization-type combustion device configured to return the fuel therein to a fuel reservoir through a fuel return path, wherein the vaporizer is inclinedly arranged, and the vaporizer has a first nozzle and a second nozzle each provided with a needle shaft. And a second burner corresponding to the first and second nozzles so as to be capable of transferring the fire, and the second burner flame opening of the second burner is connected to the first burner and the second burner. It is arranged in the upper stage of the first burner flame opening of the first burner, and the fuel return path is connected to the first nozzle. During strong combustion, it can be burned by the first burner and the second burner, No. 1 when the combustion is weak
By burning with the burner of No. 1, it is possible to expand the variable range of the thermal power without generating a bad odor, and by making sure that the flame from the burner section of the first burner is transferred to the burner section of the second burner. It is not necessary to provide a plug on each burner, and the number of parts can be reduced.

[Brief description of drawings]

The drawings show one embodiment of the present invention. FIG. 1 is a perspective view, FIG. 2 is a front view, and FIG. 3 is a schematic explanatory view. 1 ... Oil pan (fuel storage part) 2 ... Oil pump 4 ... Vaporizer 7 ... First nozzle 8 ... Fuel return path 10 ... First needle shaft 12 ... First burner 14 ...... First burner flame port 17 ...... Second nozzle 18 ...... Communication passage 20 ...... Second needle shaft 21 ...... Second burner 23 ...... Second burner flame port

Claims (1)

[Scope of utility model registration request] 1. A liquid fuel in a fuel storage portion is supplied to a vaporizer by a pump, the liquid fuel is vaporized by the vaporizer, and the vaporized gas is guided to a burner and burned. A vaporization-type combustion device configured to return to a fuel reservoir through a fuel return path, wherein the vaporizer is disposed in an inclined manner, and the vaporizer is provided with a needle shaft.
No. 2 and No. 2 nozzles are connected to each other, and a first burner and a second burner are provided in a fire transferable manner corresponding to the first and second nozzles, and a second burner of the second burner is provided. A vaporization-type combustion device, wherein a flame port is disposed above the first burner flame port of the first burner, and a fuel return path is connected to the first nozzle.