JPS61252414A - Petroleum combustion device - Google Patents

Abstract

PURPOSE:To restrict a combustion noise by a method wherein combustion air is passed through an aeration passage in a double-wall structure, discharged through a discharging port arranged in an inner wall along the inner surface of the inner wall, mixture gas flowed out through an outlet port of a uniform pressure cylinder is struck against a reflection surface, thereafter passed through the slit-like aeration port. CONSTITUTION:The section of a burner head 22 having flame ports 21 at its outer circumferential surface is cylindrical and the burner head is composed of an inner cylinder 25 and an outer cylinder 25', and a blower 26 for feeding air to a gasification chamber 24 having aeration passage 31 between the inner cylinder and the outer cylinder. A space between the burner head chamber 22' inside the cylinder and the gasification chamber 24 is divided by a partition plate 30, and at the same time a cylindrical uniform pressure cylinder 32 having one end projected into the gasification chamber 24 and the other end projected into the burner head chamber 22' by passing both ends through the partition plate 30 is arranged, the inner surface of the upper wall of the burner head chamber 22' opposing to the uniform pressure cylinder outlet port 32' is molded into a concave surface to make a reflection surface 33, the side wall surface of the reflection surface 33 is formed into a comb-like tooth form such that it has a slit-like aeration port 34 and further the lower end of the reflection surface 33 is positioned lower than the uniform pressure cylinder outlet port 32'.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a burner for oil-burning equipment that vaporizes and burns oil.

2. Description of the Related Art Conventionally, an oil combustor that vaporizes and burns oil, such as an oil fan heater, has a burner head 2 having a flame port 1 on the outer peripheral side, as shown in Fig. 3, for vaporizing oil. , a single-walled vaporization chamber 4 with an electric heater 3 embedded around its outer periphery; a blower 6 for blowing combustion air into the vaporization chamber 4 through an air nozzle 5; and a tank 7 for supplying oil to the vaporization chamber 4. The burner head 2 and the vaporizing chamber 4 are separated by a partition plate 11, and the air-fuel mixture in the vaporizing chamber 4 is uniformly flowed into the burner head 2. In order to do this, a cylindrical pressure equalizing tube 9 is arranged on the partition plate 11 so as to protrude into the vaporization chamber 4, and at the downstream end of the pressure equalizing tube 9, a pressure equalizing net 10 using, for example, a wire mesh is installed.
are placed.

That is, in this configuration, the oil ejected into the vaporization chamber 4 by the pump 8 through the nozzle 7 is vaporized by colliding with the inner wall surface of the vaporization chamber 4 heated by the electric heater 3. Tomo K.

The combustion air blown by the blower 6 is mixed in the vaporization chamber 4, flows into the burner head 2 via the pressure equalization cylinder 9 and the pressure equalization net 10, and is combusted at the flame port 1. Note that solid line arrows indicate flows such as air flow.

Problems to be Solved by the Invention However, with the above configuration, there is a problem in that the so-called combustion noise generated during combustion becomes significantly large. This is carried out from the blower 6 through the air nozzle 5 to the vaporization chamber 4.
The main causes are the ejection of high-speed airflow into the vaporization chamber 4 and the turbulence of the fluid between the inside of the vaporization chamber 4 and the flame outlet 1, and the pressure equalization network 9 also does not suppress this turbulence of the fluid. However, the effect was insufficient. On the other hand, there is also a method of increasing the diameter of the air nozzle 5 to reduce the flow velocity.
There are problems such as insufficient mixing of air and oil particles.

The present invention solves these problems, and improves the structure of the wall surface of the vaporization chamber and the inner surface shape of the burner head to reduce the jetting speed of the combustion air flow into the vaporization chamber, The purpose of the present invention is to provide an oil combustor that suppresses the dynamic pressure component within the oil combustor and suppresses combustion noise.

Means for Solving the Problem The vaporization chamber has a double wall structure consisting of an inner wall and an outer wall, and the combustion air from the blower is passed through a ventilation passage in the double wall and from a discharge port provided in the inner wall. The gas is discharged into the vaporization chamber, and a cylindrical pressure equalizing cylinder is made to protrude into the burner head chamber by penetrating the partition plate that partitions the first vaporizing chamber and the burner head chamber, and the inner surface of the upper wall of the burner head chamber facing the outlet of this pressure equalizing cylinder is The reflective surface is formed into a concave shape, and the side wall surface of this reflective surface is
It is molded in the shape of a comb so as to have a slit-like vent, and the lower end of the reflecting surface is positioned below the outlet of the pressure equalizing cylinder.

According to the above-described structure, the present invention allows the combustion air to pass through the ventilation passage in the double wall and to be discharged from the discharge port provided in the inner wall along the inner surface of the inner wall, thereby controlling the flow inside the vaporization chamber. The air-fuel mixture flowing out from the outlet of the pressure equalizing cylinder collides with the reflecting surface, and then passes through the slit vent. This changes the dynamic pressure component of the air-fuel mixture into a static pressure component, and rectifies the flow to suppress turbulent components in the airflow.

Embodiment Hereinafter, one embodiment of the present invention will be described based on the accompanying drawings.

As shown in FIGS. 1 and 2, this embodiment has a burner head 22 having a burner port 21 on the outer circumferential side and a burner head chamber 22' inside, An electric heater 2a is buried.

The vaporization chamber 24 has a cylindrical cross section and is composed of an inner cylinder 25 and an outer cylinder 25', and has a ventilation passage 31 between them.
4 ((composed of a blower 26 for blowing combustion air, and a pump 2 for sending oil from the tank 27 to the vaporization chamber 24 through the nozzle 29;
' and the vaporization chamber 24 are separated by a partition plate 30, and a cylindrical pressure equalizing cylinder 32 passes through the partition plate 3o and projects one end into the vaporization chamber 24 and the other end into the burner head chamber 22'. are placed. Further, the blower 26 and the ventilation passage 31 are connected so that the combustion air from the blower 26 flows in the direction of the edge of the ventilation passage 31, and the other end of the ventilation passage 31 is
Through a slit in the inner wall 25 and then a discharge port 35,
The gas flows into the vaporization chamber 24 in a direction along the inner surface of the inner wall 25 . Furthermore, the burner head chamber 22' of the pressure equalizing cylinder 32
The inner surface of the earthen wall of the burner head chamber 22' facing the side opening, that is, the pressure equalizing cylinder outlet 32', is formed into a concave shape to form a reflective surface 33, and the side wall surface of this reflective surface 33 has a slit-like surface. The reflective surface 33 is formed into a comb tooth shape so as to have a vent 34, and the lower end of the reflective surface 33 is located below the pressure equalizing cylinder outlet 32'. Note that solid arrows indicate flows such as airflow.

According to this configuration, the oil ejected into the vaporization chamber 24 by the pump 28 through the nozzle 29 is vaporized by colliding with the inner surface of the inner wall 25 of the vaporization chamber 24 heated by the electric heater 23. Combustion air that is introduced by the blast air 26 through the ventilation passage 31 from the discharge port 35 in a direction along the inner surface of the inner wall 25 forms a swirling flow.
The flow velocity at the time of inflow can be lowered, turbulence in the airflow can be significantly suppressed, and the combustion air and vaporized gas are effectively mixed in the vaporization chamber 24, and the pressure equalization cylinder 32
After flowing into the burner head chamber 22' through the flame opening 2
It burns at 1. Furthermore, since the air becomes heated when passing through the ventilation passage 31, vaporization and mixing within the vaporization chamber 24 can be further promoted. In addition, the pressure equalizing cylinder outlet 32
When the air mixture flowing into the burner head chamber 22' from '' collides with the reflecting surface 33 and is diverted downward, the dynamic pressure component of the air mixture changes to a static pressure component. That is, turbulence in the air mixture is absorbed. Further, by providing a slit-shaped vent hole a4 on the side surface of the reflecting surface 33, when the mixed air flow passes through the vent hole a4, a rectifying effect is produced and the removal of turbulent components is further promoted.

Effects of the Invention According to the present invention, the vaporization chamber has a double-walled structure with a ventilation passage inside, and combustion air from the blower is supplied into the vaporization chamber through the ventilation passage. The flow velocity of the airflow into the room can be suppressed to a low level, and turbulence components in the airflow can be suppressed. On the other hand, the pressure equalizing cylinder protrudes into the burner head chamber, the pressure equalizing cylinder is molded into a concave shape, and its lower end is positioned below the pressure equalizing cylinder outlet. This effectively removes turbulent components from the air mixture flow and suppresses the combustion noise caused by the turbulent components, making it possible to provide an extremely quiet oil combustor.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing the configuration of a conventional oil combustor. 22'... Burner head chamber, 24...
Evaporation chamber, 25...Inner wall, 25'...Outer wall, 26...Blower, 30...Partition plate %32...Equal pressure Cylinder, 32'...mark, pressure equalization tube outlet, 3a...reflection surface, 34...ventilation port,
35...Discharge port. 28...Honfu 0 Fig. 2 24...Vaporization chamber 26...Gong Wall 75',,, Kuto 29,...) Spall 31...Saito Road

Claims (1)

[Claims] The vaporization chamber has a double wall structure consisting of an inner wall and an outer wall, and combustion air from a blower is discharged into the vaporization chamber from an outlet provided in the inner wall through a ventilation path in the double wall, A cylindrical pressure equalizing cylinder is protruded into the burner head chamber by penetrating the partition plate that partitions the vaporizing chamber and the burner head chamber, and the inner surface of the upper wall of the burner head chamber facing the outlet of the pressure equalizing cylinder is formed into a concave shape. In addition to being a reflective surface, the side wall surface of this reflective surface is formed into a comb tooth shape with a slit-shaped vent, and the lower end of the reflective surface is located below the outlet of the pressure equalizing cylinder. vessel.