JPH04169703A - Liquid fuel burner - Google Patents

Abstract

PURPOSE:To augment disturbance of an ejected liquid itself, obtain minuter fuel particles and contrive formation of a calm flame with a small flame length, by vibrating a pressure swirl spray part by a vibrating part joined thereto. CONSTITUTION:Petroleum pressurized by a petroleum pump 9 to a set pressure is ejected from a pressure swirl nozzle 10, and is atomized by shearing forces due to the relative velocity thereof with respect to the ambient air. The nozzle 10 is vibrated by an ultrasonic vibrator 12 joined thereto. The vibration augments the disturbance of the ejected liquid itself, leading to further accelerated atomization, so that the petroleum is sprayed as minuter petroleum particles into a combustion chamber 15. Combustion air fed from a fan 14 is supplied through a duct 13 into the combustion chamber 15. When thus supplied, the combustion air is put into a swirl flow by swirl vanes 16, and performs a combustion reaction with the petroleum particles sprayed from the nozzle 10, thereby forming a flame.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a liquid fuel combustion device used for domestic hot water supply and space heating.

BACKGROUND OF THE INVENTION In recent years, there has been an increasing demand for oil-burning equipment to expand the variable range of combustion amount, reduce noise, and downsize the equipment.

Conventionally, as a part of the burner of this type of pressure spray oil combustion equipment, a burner as shown in FIG. 2 has been common.

This will be explained below with reference to FIG.

As shown in FIG. 2, an oil tank 1, an oil pump 2, and a pressure spray nozzle 3 communicate with each other through a supply pipe 4 to form an oil supply path, and the pressure spray nozzle 3 is located inside a blower path 5. It is located in the combustion chamber 6 and looks into the combustion chamber 6. Further, the air passage 5 communicates with an air blowing fan 7 , and a swirling blade 8 is arranged at an open end of the air passage 5 to the combustion chamber 6 .

In the above configuration, the oil supplied from the oil tank 1 is pressurized to a set pressure by the oil pump 2, supplied to the pressure spray nozzle 3, and is ejected from the pressure spray nozzle 3. It is atomized by force and sprayed into the combustion chamber 6. On the other hand, combustion air is supplied from a blower fan 7, passes through a blower path 5, and is supplied to a combustion chamber 6.

At this time, a swirling flow is formed by the swirling vanes 8, which undergoes a combustion reaction with the oil sprayed from the pressure spray nozzle 3 to form a flame.Problems to be Solved by the Invention In such a conventional oil combustor, the pressure spray nozzle The flame length becomes large due to the large particle size of the spray ejected from 3, making it impossible to downsize the equipment.Furthermore, combustion noise is generated by the popping sound when oil particles are rapidly boiled by the flame. Therefore, it was not possible to reduce noise. Furthermore, since the atomization of the oil ejected from the pressure spray nozzle 3 is achieved by the kinetic energy of the ejected fluid, if the ejection flow velocity is reduced, the kinetic energy is also reduced, making it impossible to achieve sufficient atomization. That is, since the jet flow velocity is determined by the amount of oil burned, as the combustion amount decreases, the jet flow velocity also decreases and the kinetic energy also decreases, which increases the spray particle diameter and causes poor combustion, making it impossible to maintain a variable combustion range.

The present invention has been made to solve the above-mentioned problems, and aims to reduce the size and noise of an oil combustor, and expand the variable range of combustion.

Means for Solving the Problems In order to achieve the above objects, the present invention provides a fuel supply section that supplies liquid fuel, a pressure swirl spray section communicating with the fuel supply section through a fuel supply pipe, and a pressure swirl spray section. a combustion chamber that looks into the combustion chamber; an air supply section that supplies air to the combustion chamber;
and a vibrating section connected to the pressure swirling spray section.

According to the present invention, with the above-described configuration, the liquid fuel ejected from the pressure swirl spray section is atomized by the shear force generated by the relative velocity with the surrounding air, but the liquid fuel is atomized by the vibrating section connected to the pressure swirl spray section. Since the ejected liquid is shaken, disturbance of the ejected liquid itself is increased, further promoting atomization and making it possible to obtain smaller fuel particles.

In addition, when the combustion amount is small, the speed of ejection from the pressure swirl spray section decreases, making it impossible to achieve sufficient atomization, but by vibrating the pressure swirl spray section, the disturbance of the ejected liquid itself can be increased. This promotes atomization and allows small fuel particles to be obtained over a wide combustion variable range.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to FIG.

As shown in FIG. 1, an oil pump 9 that is a fuel supply section and a pressure swirl nozzle 10 that is a pressure swirl spray section communicate with each other through an oil supply pipe 11 to form an oil supply path. An ultrasonic vibrator 12, which is a vibrating section that vibrates the pressure swirl nozzle 10, is joined to the nozzle 10. Also,
The blower passage 13 communicates with a blower fan 14 that is an air supply section, and a swirling blade 16 is arranged at the opening end of the blower passage 13 to the combustion chamber 15 .

In the above configuration, oil is pressurized to a set pressure by the oil pump 9 and ejected from the pressure swirl nozzle 10, and is atomized by the shear force generated by the relative velocity with the surrounding air. Since the pressure swirl nozzle 10 is vibrated by the ultrasonic vibrating body 12, the disturbance of the ejected liquid itself is increased, further atomization is promoted, and the oil particles are sprayed into the combustion chamber 15 in the form of smaller oil particles. On the other hand, combustion air is supplied from the blower fan 14, passes through the blower passage 13, and is supplied to the combustion chamber 15. At this time, the swirling vane 16 forms a swirling flow, and the pressure swirling nozzle 1
A combustion reaction occurs with the petroleum particles sprayed from 0, forming a flame.

In this way, according to the oil combustion apparatus of the embodiment of the present invention, the pressure swirl nozzle 10 is vibrated by the ultrasonic vibrator 12 joined to the pressure swirl nozzle 10, so that the ejected liquid can be reduced regardless of the amount of fuel. Since it can increase its own disturbance, atomization is promoted and smaller oil particles can be obtained. Therefore, since the oil particles become smaller, the combustion speed increases, the flame length can be shortened, and the equipment can be made smaller. Furthermore, since the petroleum particles are small, combustion noise caused by pops when the petroleum particles are rapidly boiled by flame can be reduced, and the noise level of the equipment can be reduced.

Effects of the Invention As is clear from the above embodiments, according to the present invention, the pressure swirl spray section is vibrated by the vibration section joined to the pressure swirl spray section, so that the disturbance of the ejected liquid itself can be increased. Atomization is promoted with a wide combustion variable range, making it possible to obtain smaller fuel particles. Therefore, a quiet flame with a short flame length can be formed, and a small and low-noise device with a wide combustion variable range can be provided.

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional view of an oil rate device according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view of the main parts of a conventional oil combustion device. 9... Fuel supply section, 10... Pressure swirl spray section, 12... Vibration section, 14... Air supply section, 15...・Combustion chamber. Name of agent: Patent attorney Akira Okaji and 2 other people 9--1 Fuel-like collar part/θ--1 Pressure Buds spraying part 12--1 Stationary part 14--1 Hall I Kujun part! 5---Combustion chamber Figure 1

Claims (1)

[Claims] A fuel supply section that supplies liquid fuel, a pressure swirl spray section that communicates with the fuel supply section through a fuel supply pipe, a combustion chamber that looks into the pressure swirl spray section, and air that supplies air to the combustion chamber. A liquid fuel combustion device comprising a supply section and a vibrating section joined to the pressure swirl spray section.