JPH02610B2 - - Google Patents

Description

[Detailed description of the invention] Industrial applications The present invention relates to a vaporizing combustion device.

Structure of Conventional Example and Its Problems Conventional evaporative combustion devices normally extinguish a fire by stopping the energization of the electromagnetic pump and the blower motor for combustion air when extinguishing a fire.

FIG. 1 shows the control circuit of the combustion device. 1st
In the figure, when the operation switch 1 is closed, the vaporization heater 2 is energized. When the temperature switch 3 installed in the vaporizer switches from E-ro to E-ha at a constant temperature, the power transformer 4 is energized, the combustion control circuit 5 and the relay 6 are also energized, and the relay 6 is normally open. Contact 6a is closed and the power transformer circuit is self-maintained. When the relay 7 is energized by the control circuit 5, the normally open contact 7a is closed, and the oscillation circuits 11 of the combustion blower 8, hot air blower 9, ignition device 10, and fuel supply pump 12 start being energized. Then, ignition and combustion begin. When the fire is extinguished, opening the operation switch 1 stops the power supply to all parts and extinguishes the fire. However, even if the electromagnetic pump 9 stops, the fuel may drip down from the nozzle section that supplies fuel to the vaporizing section. As a result, even after the fire has been extinguished, vaporized fuel gas is generated in the vaporizer, causing problems such as odor and incomplete combustion gas leaking out of the appliance when the fire is extinguished.

OBJECTS OF THE INVENTION The present invention eliminates these conventional drawbacks and reduces the generation of degassing and incomplete combustion gas during fire extinguishing.

Structure of the Invention In order to achieve the above object, the present invention forms a combustion reservoir with a large diameter in a fuel supply nozzle, and a heater is attached to this fuel reservoir to heat the fuel in the fuel reservoir while it is in a liquid phase. During combustion, the heater is energized, and at the same time as the fire is extinguished, the energization to the heater is stopped, and the nozzle is cooled by the combustion blower.

DESCRIPTION OF EMBODIMENTS One embodiment of the present invention will be described below regarding the case of a vaporization type combustion apparatus used in a hot air heater.

In FIG. 2, reference numeral 21 denotes a fuel tank, and fuel 22 in the fuel tank 21 is sucked up by a pump 23 and supplied via an oil pipe 24 and a nozzle 25 to a fuel vaporization section 27 provided with a vaporization heater 26. Ru. The nozzle 25 is pipe-shaped and has a large-diameter fuel reservoir 28 formed in its center, and a sheathed heater 29 is provided near the fuel reservoir 28 . 30 is a blower for supplying combustion air, and 31 is its blower fan.

Reference numeral 32 denotes a ventilation passage that supplies the combustion air produced by the blower 30 and the ventilation fan 31 to the fuel vaporization section 27, and includes the nozzle 25 and the fuel reservoir section 2.
8 and a sheathed heater 29 are provided within this ventilation passage 32. 33 is an ignition device, and ignition electrode 3
4 to the combustion section 35 to ignite the mixed gas of the fuel and combustion air vaporized in the fuel vaporization section 27. A first temperature switch 36 is installed in the vaporizer 27 and is switched depending on the temperature of the vaporizer 27, and a second temperature switch 37 is installed near the combustion section and is closed when the temperature rises.

Figure 3 shows the electrical circuit diagram of this combustion device.
8 is a power plug, 39 is an operation switch, 40 is a blower for hot air, 41 is an oscillation circuit for driving the fuel supply pump 23, 42 is a diode bridge for full-wave rectification, 43 is a smoothing capacitor, 44 45 is a combustion control circuit, and 46 is a relay driven by the combustion control circuit 45, which has a first normally open contact 46a and a second normally open contact 46b. . 47 is capacitor 4
It is a self-holding relay connected to both ends of 3, and has a normally open contact 47a. Here, the common contact A of the switching contacts of the first temperature switch 36 is connected to one side c of the power supply, and the constant contact B is connected to the sheathed heater 26.
In addition, the constant contact C is connected to the sheathed heater 29, the ignition device 33, and the driving oscillation circuit 41 of the fuel supply pump 23 via the power transformer 40a and the second normally open contact 46b of the relay 46. . Further, the normally open contact 47a of the relay 47 is connected to the first contact point 47a.
The common contact A and the normally open contact C of the temperature switch 36 are connected in parallel. On the other hand, vaporization heater 2
6. The other ends of the power transformer 40a, the sheathed heater 29, the ignition device 33, and the oscillation circuit 41 are connected to one end d of the power source via the operation switch 39.

Further, the combustion air blower 30 and the warm air blower 40 are connected to one end c of the power supply via a parallel circuit consisting of a second temperature switch 37 and a second normally open contact 46a of a relay 46, and the other end of each is directly connected to one end d of the power supply.

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

First, when the power plug 38 is connected to a power outlet and the operation switch 39 is closed, electricity is started to be supplied to the vaporization heater 26 via the switching contact E-ro of the first temperature switch 36. When the temperature of the vaporizer 27 rises and the first temperature switch 36 reaches a certain temperature, the switching contact switches from E-ro to E-HA, and the relay 47 is energized via the power transformer 40a, making the normally open contact 47a is closed, the combustion control circuit 45 is also energized, the relay 46 is also energized, and the first normally open contact 46a and the second normally open contact 46b are energized.
is closed, and the sheathed heater 29, ignition device 33,
Electricity is applied to the fuel air blower 30, hot air blower 40, and pump 23, and ignition and combustion are started. Even if the temperature of the vaporizer 27 falls and the first temperature switch 36 switches from I-H to E-B, combustion continues because the normally open contact 47a of the relay 47 is closed. During combustion, the second temperature switch 37 provided near the combustion section is closed. Further, since the sheathed heater 29 is energized in the oil reservoir portion 28 of the nozzle 25, the fuel is heated in this portion and is supplied to the vaporization portion 27.

When the fire is extinguished, when the operation switch 39 is opened, the power supply to the power transformer 40a, the electromagnetic pump 23, the sheathed heater 29, and the ignition device 33 is stopped, and the fire is extinguished. At this time, since the combustion air blower 30 and the hot air blower 40 are energized via the second temperature switch 37, the energization is continued until the temperature of the temperature switch 37 falls. On the other hand, nozzle part 2
5 and the fuel inside the oil reservoir 28, which was heated by the sheathed heater 29 during combustion, is extinguished and at the same time, the power supply to the sheathed heater 29 is stopped and heating is stopped. Therefore, the fuel within the nozzle 25 is rapidly cooled. Therefore, the fuel is in a contracted state compared to when it is combusted, and as a result, the fuel that has stopped at the tip of the nozzle 25 is sucked toward the oil sump 28, and the nozzle 2 after extinguishing.
This makes it possible to prevent fuel from flowing into the vaporizer 27 from the fuel tank 5 .

Effects of the Invention As described above, the present invention can prevent fuel from dripping into the vaporization section, thereby reducing odor and incomplete combustion gas generation during fire extinguishing, and improving hygiene and hygiene.
A great effect on safety can be expected.

[Brief explanation of drawings]

Figures 1a and 1b are control circuit diagrams of a conventional evaporative combustion apparatus, Figure 2 is a sectional view of a evaporative combustion apparatus according to an embodiment of the present invention, and Figures 3a and 3 are control circuit diagrams of the same. be. 25... Nozzle, 27... Vaporizing section, 28... Oil reservoir section, 29... Heater, 30... Combustion air blower, 31... Blowing fan, 32... Blowing passage.

Claims (1)

[Claims] 1.Equipped with a vaporization section that vaporizes fuel, a nozzle that supplies fuel to this vaporization section, and a blower that supplies combustion air to the vaporization section, the nozzle being installed in the air passage from the blower and installed in the middle thereof. The oil reservoir is provided with a large diameter oil reservoir, and the oil reservoir is provided with a heater that is energized during combustion to heat the fuel in the oil reservoir in a liquid phase and is turned off when the fire is extinguished, and the blower is turned on after the fire is extinguished. A vaporization combustion device configured to conduct electricity for a certain period of time.