JPH0739852B2 - Vaporizer - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a vaporizer of a vaporization type liquid fuel combustion apparatus.

2. Description of the Related Art A conventional combustion apparatus of this type is constructed as shown in FIGS. 3 and 4 (for example, Japanese Utility Model Laid-Open No. 54-14933). In the figure, 1 is a vaporization cylinder in which a heater 2 is embedded,
3 is a mixing plate, 4 is a first flame port formed integrally with the mixing plate 3 and radially arranged, and 5 is a second flame port 6 having a large number of small holes.
Is a burner head, 7 is a secondary air supply pipe in which air outlets 8 are radially formed around the tip of the burner head, 9 is a secondary air chamber in which a large number of air ports 10 are opened inward, and 11 is It is a primary air nozzle with a fuel nozzle 12 arranged in the center,
It is attached to the vaporizing cylinder 1 in the turning direction.

Secondary air supply pipe 7, secondary air chamber 9 and primary air nozzle
11 are each connected to a blower fan (not shown), and the fuel nozzle 12 is connected to an oil supply device (not shown).

In the above configuration, when the vaporization cylinder 1 is heated by the heater 2 and primary air and liquid fuel are supplied into the vaporization cylinder 1 from the primary air nozzle 11 and the fuel nozzle 12, the fuel is heated to the inner wall of the vaporization cylinder 1. At the same time, it collides obliquely and is vaporized while moving on the inner wall and mixed with the primary air to form a mixture, which is jetted from the first flame port 4 and the second flame port 6 and burned. At this time,
Secondary air is supplied outward from the air outlet 8 of the secondary air supply pipe 7 and inward from the air port 10 of the secondary air chamber 9 for complete combustion.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in the above-mentioned conventional example, since the liquid fuel collides obliquely with the air from the primary air nozzle against the inner wall of the vaporizing cylinder, the fuel particles are less likely to be split and diffused on the wall surface. The fuel particles are accelerated by the air flow and vaporize while floating as if pebbles were thrown on the surface of the water, resulting in a slow vaporization speed. Further, when the temperature of the vaporizing cylinder is slightly high, there is a problem that the fuel only slides on the inner wall and vaporization is not performed at all.

Means for Solving the Problems With respect to the above problems, the present invention is heated by a heater,
Vase-shaped vaporization cylinder, cylindrical burner head that communicates with the upper opening of the vaporization cylinder to form a flame inside, and stands vertically from the bottom of the vaporization cylinder together with the vaporization cylinder and the tip at the center of the lower part of the burner head And a fuel nozzle and an air nozzle connected to the side wall of the vaporizing cylinder so that liquid fuel and combustion air collide with the middle cylinder at a substantially right angle.

Action According to the present invention, with the above configuration, the liquid fuel delivered into the vaporization cylinder collides with the middle cylinder and is divided into fine particles, and
Since the fuel particles after splitting fall to the bottom of the vaporizing cylinder without being accelerated by the air flow, quick vaporization can be performed.

Example Next, one example of the combustion apparatus of the present invention will be described with reference to FIGS. 1 and 2. In the figure, 13 is a heater, 14 is a vaporizing cylinder, 15 is a middle cylinder, 16 is a center air port, 17 is a diffusion plate, 18 is a mixing plate, 19 is a mixture guide, 20 is a burner head, 21 is a flame holding cylinder, 22 is a flame holding net, 23 is an air nozzle, 24 is a fuel nozzle, 25 is a fuel pump, 26 is a fuel tank, 27 is a blower fan, 28 is a control valve, 29 is an outer cylinder, and 30 is an outer peripheral air port.

In the above configuration, when the heater 13 is energized to heat the vaporization cylinder 14 to a predetermined temperature, the fuel pump 25 and the blower fan
27 operates, liquid fuel is supplied from the fuel tank 26 through the fuel nozzle 24 into the vaporization cylinder 14, and a part of combustion air enters the vaporization cylinder 14 from the air nozzle 23 as primary air. The liquid fuel that has entered the vaporization cylinder 14 collides with the middle cylinder 15 almost vertically while being accelerated by the primary air flow and splits, and is scattered into the vaporization cylinder 14 as small droplets. At this time,
Since the velocity of the primary air flow is reduced by the collision with the middle cylinder 15, it does not accelerate the fuel particles but also conveys the fuel particles to the rear side of the middle cylinder 15 by a gentle flow and vaporizes them. It plays the role of expanding the area. The fuel particles thus scattered instantly vaporize at the bottom and side walls of the vaporization cylinder 14 and mix with the primary air to form a mixture. The air-fuel mixture is guided by the air-fuel mixture guide 19 while being uniformly mixed by the mixing plate 18, ejected from the cylindrical burner head 20 and ignited by an igniter (not shown), and burns while forming an inward flame. Is performed. The burner head 20 is composed of a flame holding cylinder 21 having a large number of small holes and a flame holding net 22 tightly wound inside the flame holding cylinder. On the other hand, a part of the combustion air supplied from the blower fan 27 is branched by the control valve 28, part of which is supplied to the middle cylinder 15 which stands upright from the bottom of the vaporization cylinder 14, and the rest is It is supplied into the outer cylinder 29. Combustion air entering the middle tube 15 is ejected from the center air nozzle 16 in the axial direction of the burner head 20. However, the secondary air at an angle to the flame from the burner head 20 by the diffusion plate 17 disposed above Supplied as. Combustion air supplied into the outer cylinder 29 is also ejected from the outer air inlet 30 which is opened as a gap annular near the upper end of the burner head 20 in the radial direction, a direction substantially perpendicular to the flame extending from the burner head 20 The secondary air is supplied to the. In this way, the secondary air is supplied to the combustion flame in the burner head 20 from both inside and outside, so that complete combustion is performed and the flame length becomes short. Further, the recovery of the combustion heat to the vaporization cylinder 14
Since it is performed by heating the middle cylinder with a flame, the middle cylinder 15
Becomes hotter than the other parts of the vaporization cylinder 14, causing fuel collision /
There is also the effect of easy division. That is, the high temperature middle cylinder 15
While promoting the splitting / scattering of the fuel collided by the wall surface and preventing the tar from adhering to the collision surface, the vaporization cylinder wall having a temperature slightly lower than that of the middle cylinder can instantaneously vaporize the fuel.

EFFECTS OF THE INVENTION As is apparent from the above description, according to the vaporization device of the present invention, liquid fuel collides with combustion air almost vertically to the middle cylinder erected in the vaporization cylinder, and splitting occurs, so that the splitting occurs. The subsequent fuel particles are dispersed over a wide area on the side wall and bottom surface of the vaporizing cylinder, and because they are not excessively accelerated by the air flow, the fuel particles are sufficiently contacted with the inner surface of the vaporizing cylinder and rapid vaporization is performed. effective.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of a combustion apparatus showing an embodiment of the present invention,
2 is a sectional view taken along the line AA in FIG. 1, FIG. 3 is a longitudinal sectional view showing a conventional combustion apparatus of this type, and FIG. 4 is a sectional view taken along the line BB in FIG. 13 ... Heater, 14 ... Vaporizing cylinder, 15 ... Medium cylinder, 20 ... Burner head, 23 ... Air nozzle, 24 ... Fuel nozzle.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoshifumi Moriya 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Hideki Kaneko 1006 Kadoma, Kadoma City, Osaka Matsushita Electric Industrial Co., Ltd. 56) Bibliography Shou 62-45525 (JP, U) Sui 59-195333 (JP, U)

Claims (1)

[Claims] 1. A vase-shaped vaporization cylinder heated by a heater, a cylindrical burner head communicating with an upper opening of the vaporization cylinder to form a flame inside, and a vaporization cylinder from the bottom of the vaporization cylinder. A middle cylinder that is integrally erected and has its tip facing the center of the lower part of the burner head, and a fuel nozzle and an air nozzle that are connected to the vaporization cylinder side wall so that liquid fuel and combustion air collide with the middle cylinder at a substantially right angle. A vaporizer composed of and.