JPH0571623U - Liquid fuel vaporization combustion device - Google Patents

Abstract

(57) [Summary] [Purpose] To stabilize the supply of vaporized fuel from the vaporizer 4 to the burner 5 when the flow rate of the liquid fuel sent to the vaporizer 4 is reduced. [Arrangement] An oil inlet 9 of a carburetor 4 and an oil feed pipe 8 are arranged in an inflow passage 19 for letting the combustion air B flow into the burner 5, and these are forcedly cooled by the combustion air B. For cooling the oil inlet 9 of the vaporizer 4 and the oil feed pipe 8,
It is also possible to use heated air A.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a liquid fuel vaporization type combustion device used as an oil fan heater or the like.

[0002]

[Prior Art]

 A general configuration of the oil fan heater will be described with reference to FIGS. 3 and 4. The heated air A (indoor air) is introduced into the cover by the fan 1 provided on the rear surface of the cover, heated while flowing outside the combustion chamber 2 in the cover, and discharged from the grill 3 on the front surface of the cover. .. A carburetor 4 and a burner 5 are arranged in the combustion chamber 2. The liquid fuel (kerosene) in the fuel tank 6 is sent to the carburetor 4 through the oil feed pipe 8 by the electromagnetic pump 7, and flows into the carburetor 4 from the oil inlet 9 thereof. The liquid fuel flowing into the carburetor 4 is evaporated and vaporized by the vaporization filter 10 inside the vaporizer 4, supplied to the burner 5 from the nozzle 11, and ignited by the ignition device 13 connected to the power source 12 to start combustion. To do. The heated air A is heated by heat exchange and exhaust gas when passing through the outside of the combustion chamber 2. Combustion air B is supplied to the burner 5 in the combustion chamber 2 together with the vaporized fuel.

The vaporization filter 10 in the vaporizer 4 is heated to a predetermined temperature by the heater 15 whose temperature is controlled by the thermistor 14, and promotes vaporization of the liquid fuel. Further, a heat collector 16 facing the burner 5 is attached to the carburetor 4, and the carburetor 4 is warmed by the combustion heat in the burner 5 to reduce the power consumption of the heater 15. When the nozzle 11 is closed, the solenoid valve 17 is opened and the liquid fuel in the carburetor 4 is returned to the fuel tank 6 by the return pipe 18.

[0004]

[Problems to be solved by the device]

 By the way, when kerosene, which is the fuel of an oil fan heater, is directly contacted with a hot metal surface to vaporize it, a gas layer formed by the vaporization of kerosene is formed between the metal surface and the liquid kerosene. Kerosene evaporation becomes unstable. In order to solve this problem, the vaporization filter 10 is provided in the vaporizer 4. The vaporization filter 10 is composed of a porous ceramics, a metal mesh, or the like, which hardly forms a gas layer and can increase the contact area with kerosene. In order to efficiently vaporize kerosene with the vaporization filter 10, it is desirable that the temperatures of the oil inlet 9 and the oil feed pipe 8 of the vaporizer 4 be sufficiently lower than the boiling point of kerosene. Is made of stainless steel or the like having a lower thermal conductivity than the vaporizer 4. Further, the kerosene sent to the vaporizer 4 through them has a relatively low temperature, and the cooling by the kerosene is large.

However, since the vaporizer 4 is arranged in the combustion chamber 2, it is unavoidable that the vaporizer 4 is heated by combustion heat. In particular, when the flow rate of kerosene to be sent to the vaporizer 4 is reduced, the cooling effect of kerosene decreases, so the temperature of the oil inlet 9 of the vaporizer 4 and the oil feed pipe 8 rise, and kerosene reaches the vaporization filter 10. May evaporate previously. In that case, the pressure inside the vaporizer 4 fluctuates due to the phenomenon of over-boiling, and the amount of vaporized kerosene ejected from the nozzle 11 fluctuates.

The present invention was devised in view of the above circumstances. Even though the vaporizer is arranged in the combustion chamber, even when the flow rate of the liquid fuel sent to the vaporizer is reduced, An object of the present invention is to provide a liquid fuel vaporization type combustion device capable of stably supplying vaporized fuel to a burner.

[0007]

[Means for Solving the Problems]

 A first liquid fuel vaporization type combustion apparatus according to the present invention has a vaporizer and a burner arranged in a combustion chamber, vaporizes the liquid fuel in a fuel tank by the vaporizer, and supplies the vaporized fuel to the burner. In a combustion device that heats heated air that flows outside the combustion chamber by burning the supplied combustion air, a fuel inflow section that causes liquid fuel to flow into the carburetor is connected to the combustion air supplied to the burner. The feature is that it is located in the inflow channel of the.

A second liquid fuel vaporization type combustion apparatus according to the present invention has a vaporizer and a burner arranged in a combustion chamber, vaporizes the liquid fuel in a fuel tank by the vaporizer and supplies the vaporized fuel to a burner, In a combustion device that burns with the combustion air supplied to the burner to heat the heated air flowing outside the combustion chamber, a part of the heated air is caused to flow into the combustion chamber, It is characterized in that a fuel inflow portion for injecting the liquid fuel into the vaporizer is positioned.

[0009]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view showing a main part of an example of a first liquid fuel vaporization type combustion device.

The liquid fuel vaporization type combustion device is a petroleum fan heater, and has a vaporizer 4 and a burner 5 in the combustion chamber 2. Kerosene in the fuel tank flows into the vaporizer 4 from the oil inlet 9 through the oil feed pipe 8. The burner 5 is supplied with kerosene vaporized by the vaporizer 4 and combustion air B. The combustion air B is sent to the burner 5 through an inflow passage 19 formed by a pipe. The oil inlet 9 and the oil feed pipe 8 of the carburetor 4 are arranged in the inflow passage 19 of the combustion air B so as to come into contact with the combustion air B flowing in the inflow passage 19. Since the other configurations are substantially the same as those of the combustion device of FIGS. 3 and 4, the same parts are designated by the same reference numerals and detailed description thereof will be omitted.

In the present combustion apparatus, the carburetor 4 is heated by the combustion in the burner 5 in the combustion chamber 2, but the oil inlet 9 and the oil feed pipe 8 of the carburetor 4 flow into the burner 5. It is forcibly cooled by the combustion air B at about room temperature. Therefore, even if the amount of kerosene flowing through the oil feed pipe 8 and the oil inlet 9 decreases and the cooling effect of kerosene decreases, the temperature rise of the oil feed pipe 8 and the oil inlet 9 is suppressed. Therefore, the evaporation of kerosene in the oil supply pipe 8 and the oil inlet 9 is prevented, and the vaporized kerosene is stably supplied from the vaporizer 4 to the burner 5. Further, the combustion air B sent to the burner 5 is preheated by the heat of the oil feed pipe 8 and the oil inlet 9, so that the combustion efficiency in the burner 5 is increased.

FIG. 2 is a side view showing the main part of an example of the second liquid fuel vaporization type combustion device.

The heated air A (indoor air) is sucked into the cover from the rear surface of the cover by the fan 1. The rear surface 20 of the combustion chamber 2 provided in the cover is provided with a hole 21 so that a part of the heated air A sucked into the cover flows into the combustion chamber 2. Then, an oil feed pipe 8 and an oil inlet 9 of the carburetor 4 are arranged in the flow path of the heated air A flowing into the combustion chamber 2 through the hole 21. According to this configuration, the oil feed pipe 8 and the oil inlet 9 of the carburetor 4 are forcibly cooled by the heated air A. Therefore, when the amounts of kerosene flowing through the oil feed pipe 8 and the oil inlet 9 are reduced, the temperature rise of these is suppressed, and the vaporized kerosene is stably supplied from the vaporizer 4 to the burner 5. Since other configurations are substantially the same as those of the combustion device of FIGS. 3 and 4, the same parts are denoted by the same reference numerals and detailed description thereof will be omitted.

[0014]

[Effect of the device]

 As described above, the first liquid fuel vaporization-type combustion device according to the present invention forcibly cools the fuel inflow portion for injecting the liquid fuel into the vaporizer by the combustion air supplied to the burner. The second liquid fuel vaporization type combustion device cools the fuel inflow portion with heated air. Therefore, in any liquid fuel vaporization type combustion device, the temperature rise of the fuel inflow part is suppressed even when the flow rate of the liquid fuel sent to the vaporizer is reduced, so that the liquid fuel from the vaporizer to the burner is stable. Is supplied and stable combustion is performed. Furthermore, in the case of the first liquid fuel vaporization type combustion device, the combustion air is preheated as the fuel inflow portion is cooled, so that the combustion reaction in the combustion chamber can be promoted. ..

[Brief description of drawings]

FIG. 1 is a plan view showing a main part of an example of a first liquid fuel vaporization type combustion device.

FIG. 2 is a side view showing a main part of an example of a second liquid fuel vaporization type combustion device.

FIG. 3 is a schematic configuration diagram of a liquid fuel vaporization type combustion device.

FIG. 4 is a schematic configuration diagram of a combustion chamber.

[Explanation of symbols]

 2 Combustion chamber 4 Vaporizer 5 Burner 8 Oil feed pipe 9 Oil inlet 19 Inflow path 21 Hole A Heated air B Combustion air

Claims (2)

[Scope of utility model registration request] 1. A carburetor and a burner are provided in a combustion chamber, liquid fuel in a fuel tank is vaporized by the carburetor and supplied to a burner, and burned by the combustion air supplied to the burner to burn. In a combustion device that heats heated air flowing outside the chamber, a fuel inflow part for injecting liquid fuel into the carburetor is located in an inflow path of combustion air supplied to the burner. Liquid fuel vaporization type combustion device. 2. A carburetor and a burner are arranged in the combustion chamber, liquid fuel in a fuel tank is vaporized by the carburetor and supplied to the burner, and burned by combustion air supplied to the burner. In a combustion device for heating heated air flowing outside a chamber, a part of the heated air is made to flow into a combustion chamber, and a fuel inflow part for making liquid fuel flow into the carburetor is located in the inflow path. A liquid fuel vaporization type combustion device characterized by the above.