JPH0646151U - Evaporative combustion device - Google Patents

Abstract

(57) [Abstract] [Purpose] In a vaporization type combustion device designed to clean the carburetor at the time of fire extinguishment, the cost of the device is reduced without using an expensive on-off valve, and a sufficient carburetor cleaning effect is achieved. To get [Structure] Main fuel reservoir 1, fuel supply pump 3 for feeding fuel from main fuel reservoir 1 to vaporizer 2, and pump 3
In a vaporization type combustion device comprising a fuel supply pipe 4 for connecting a fuel supply pipe 4 to a vaporizer 2, a vaporization type combustion device in which the fuel supply pipe 4 is branched midway and a branch passage 20 is connected to the main fuel reservoir 1.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a new type of vaporization type combustion device in which a fuel supply passage to a vaporizer is provided with a branch passage.

[0002]

[Prior art]

 As a vaporization type combustion device capable of cleaning the inside of the vaporizer at the time of extinguishing a fire, for example, one shown in FIG. 2 is known. In such a vaporization type combustion device, the fuel storage section 21 and the carburetor 22 are connected by a fuel feed passage 24 provided with a fuel supply means 23 composed of an electromagnetic pump, and the carburetor 22 and the fuel storage section 21 are connected. Are connected to each other by a return path 28 provided with an opening / closing valve 25 composed of a solenoid valve.

During ignition and combustion, the on-off valve 25 is closed, the fuel supply means 23 is operated, and the liquid fuel in the fuel storage section 21 is fed to the carburetor 22 via the fuel feed path 24. The vaporized fuel vaporized by the vaporizer 22 is sprayed from the nozzle 26 and burned at the burner 27.

At the time of extinguishing the fire, when the operation of the fuel supply means 23 is stopped and the opening / closing valve 25 is opened, the residual gas remaining in the carburetor 22 is sent to the fuel reservoir 21 side via the return passage 28. Flows in. Due to this operation, the inside of the vaporizer 22 was cleaned.

[0005]

[Problems to be solved by the device]

 In the above device, each mode of combustion, fire extinguishing, and cleaning is controlled by opening and closing the on-off valve. However, there is a problem that the cost of the device increases because the on-off valve made of the solenoid valve is expensive. In the case of fire extinguishing, the residual gas in the carburetor is discharged to the fuel storage part side through the return path of smaller resistance, that is, by utilizing the difference in the inflow resistance between the nozzle side and the return path side. However, the residual gas does not completely escape from the inside of the carburetor because it is left to the natural outflow, and if the carburetor is not cleaned sufficiently, it may cause clogging of the carburetor. There was a problem of becoming.

The present invention focuses on such a problem, enables switching between ignition, combustion mode and fire extinguishing mode without using an expensive on-off valve, and is sufficient for extinguishing a fire. The purpose is to be able to obtain a cleaning effect.

[0007]

[Means for Solving the Problems]

 The vaporization type combustion apparatus of the present invention for this purpose includes a fuel storage section, a fuel supply means for supplying fuel from the fuel storage section to a carburetor, and a fuel supply section for connecting the fuel storage section and the carburetor. In a vaporization type combustion apparatus having a passage, the fuel feed passage is branched midway, and the branched passage is connected to the fuel storage section.

[0008]

[Action]

In the vaporization type combustion device as described above, the fuel flow rate q _{2 that} is naturally returned to the fuel reservoir is determined to be a substantially constant amount due to the flow passage resistance of the fuel return passage (branch passage). With respect to this q ₂ , the fuel supply amount q ₁ by the fuel supply means is arbitrarily controlled by controlling the fuel supply means. By controlling q _{1 so} that q ₁ > q ₂ at the time of ignition and combustion, the fuel of q ₁ −q ₂ will be fed to the carburetor, and It is vaporized and used for combustion in the burner section.

At the time of extinguishing the fire, by controlling q _{1 so} that q ₁ ≦ q ₂ , the fuel is circulated from the fuel storage section → fuel supply means → fuel supply path → branch path → fuel storage section. , It does not flow to the vaporizer side. That is, as a result, even if q ₁ <q ₂ , the fuel actually delivered from the fuel supply means is returned to the fuel storage portion via the full amount branch path. That is, q ₁ = q ₂ in practice. As a result, the Ezeta effect is generated at the branch portion of the fuel supply passage and the branch passage, and the residual gas in the carburetor is forcibly absorbed together with air to the fuel storage portion side. This causes the vaporizer to be forcibly and thoroughly cleaned.

[0010]

【Example】

 Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a vaporization type combustion apparatus according to an embodiment of the present invention. In the figure, reference numeral 1 denotes a main fuel reservoir as a fuel reservoir that stores liquid fuel. The main fuel reservoir 1 is a constant oil leveler in which an oil level A is constantly adjusted. ing. 2 is a vaporizer for vaporizing liquid fuel, 3 is an electromagnetic pump, a fuel supply pump as a fuel supply means for supplying fuel from the main fuel reservoir 1 to the vaporizer 2, and 4 is a fuel as a fuel feed path. Supply pipes 5 indicate burners for burning the vaporized fuel, respectively. The vaporizer 2 vaporizes the liquid fuel using the heater 6 and supplies the vaporized fuel from the nozzle 7 to the burner 5. A thermistor 8 detects the temperature of the vaporizer 2. Reference numeral 9 indicates an ignition heater for igniting the vaporized fuel in the burner 5, and reference numeral 15 indicates a flame sensor for detecting the presence or absence of a flame in the burner 5. Reference numeral 20 denotes a branch path, which branches from the middle of the fuel supply pipe 4 and is connected to the main fuel reservoir 1.

Reference numeral 13 denotes a control device. The control device 13 sends an energization control signal to the ignition heater 9 and receives from the burner 5 a signal indicating the presence or absence of a flame by the flame sensor 15. Further, a temperature detection signal of the vaporizer 2 is sent from the vaporizer 2 from the thermistor 8. Further, the control device 13 controls heating and driving of the heater 6 of the carburetor 2 and the fuel supply pump 3 via the drive device 14.

In the embodiment apparatus configured as described above, the fuel supply pump 3 is operated at the time of ignition, and the liquid fuel in the main fuel reservoir 1 starts to be supplied through the fuel supply pipe 4. A part of the fuel delivered by the fuel supply pump 3 is returned to the main fuel reservoir 1 via a branch passage 20 provided in the middle of the fuel supply pipe 4, but due to the flow resistance of the branch passage 20, Fuel flow rate q returned to the fuel reservoir 1 naturally₂Is a fixed amount. On the other hand, the fuel quantity q supplied by the fuel supply pump 3₁Can be arbitrarily set by controlling the fuel supply pump 3 (for example, controlling the number of revolutions and the capacity). Therefore q ₁ > Q₂If the fuel supply pump 3 is controlled so that₁-Q₂Minutes of fuel will be delivered to the carburetor 2. The fuel fed to the carburetor 2 is vaporized in the carburetor 2 heated by the heater 6, sprayed on the burner 5 from the nozzle 7, ignited by the ignition heater 9 to start combustion, and then to the normal combustion stroke. And transition.

At the time of extinguishing the fire, if the discharge amount of the fuel supply pump 3 is controlled so that q ₁ ≦ q ₂ , the fuel is not supplied to the carburetor 2 side, so the fuel in the system is stored in the main fuel storage. It is circulated in the order of container 1 → fuel supply pump 3 → fuel supply path 4 → branch path 20 → main fuel storage 1.

By circulating the fuel in the system as described above, an ejector effect is generated at the branch portion of the fuel supply pipe 4 and the branch passage 20. Therefore, the residual gas in the vaporizer 2 is forcibly sucked together with the air. Therefore, the residual gas in the vaporizer 2 is completely removed, and a sufficient cleaning effect can be obtained.

[0015]

[Effect of device]

 As described above, according to the vaporization type combustion device of the present invention, a branch passage is provided in the middle of the fuel feed passage for feeding the liquid fuel from the fuel storage portion, and the branch passage and the fuel storage portion are connected to each other. Since it is configured, by controlling the fuel supply means, each operation of ignition, combustion, and extinguishing can be performed without using an expensive on-off valve, and while reducing the cost of the device, at the time of extinguishing the carburetor A sufficient cleaning effect can be obtained.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a vaporization type combustion apparatus according to an embodiment of the present invention.

FIG. 2 is a schematic configuration diagram of a conventional vaporization type combustion device.

[Explanation of symbols]

 1 Main Fuel Reservoir (Fuel Reservoir) 2 Vaporizer 3 Fuel Supply Pump (Fuel Supply Means) 4 Fuel Supply Pipe (Fuel Supply Line) 5 Burner 6 Vaporizer Heater 7 Nozzle 8 Thermistor 9 Ignition Heater 13 Controller 14 Drive Device 15 Flame sensor 20 Branch path

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Creator Yasushi Saito 20 Kotobukicho, Isesaki City, Gunma Sanden Co., Ltd.

Claims (3)

[Scope of utility model registration request] 1. A vaporization type combustion apparatus comprising a fuel storage part, a fuel supply means for supplying fuel from the fuel storage part to a carburetor, and a fuel supply path connecting the fuel storage part and the carburetor. In the vaporization-type combustion apparatus, the fuel feed path is branched midway, and the branched path is connected to the fuel storage section. 2. The vaporization type combustion apparatus according to claim 1, wherein the flow rate of the fuel supplied by the fuel supply means is larger than the flow rate of the fuel returning to the fuel storage section through the branch passage during ignition and combustion. . 3. The vaporization type combustion apparatus according to claim 1, wherein the flow rate of the fuel supplied by the fuel supply means is the same as the flow rate of the fuel returning to the fuel storage section through the branch passage when the fire is extinguished.