JPH0810730Y2 - Pot burner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial field of application The present invention has a heater for preheating / ignition at the bottom of a burner, and a pot burner that burns liquid fuel supplied to the bottom of the burner by vaporizing and vaporizing the liquid fuel by this heater. It is about.

2. Description of the Related Art In a conventional pot burner of this type, a fuel diffusion material such as a heat-resistant glass cloth is attached and fixed to the bottom of the burner with an adhesive in order to promote diffusion and evaporation of liquid fuel and to prevent temperature rise. 63-217116).

Problems to be Solved by the Invention In the above, when the ignition is performed at a low temperature and the power supply voltage is dropped, the heater is cooled by the air flowing into the pot burner, the temperature does not reach the required temperature, and the ignition does not occur. . Also, during steady combustion, the fuel dripping on the fuel diffusion material at the bottom of the pot burner is vaporized and vaporized at that portion, so that the temperature at the bottom of the burner causes a large difference between the fuel dripping portion and the portion where the fuel does not propagate, causing thermal stress. Combustion failure occurred due to the deformation of the burner bottom due to the generation of the fuel and deviation of the evaporation and vaporization of the fuel.

Means for Solving the Problems The present invention has been made to solve the above problems, and shields both sides of the heater in the longitudinal direction with shield plates, and at the bottom of the burner around the shield plate, a fuel dripping side. The fuel diffusion material having a small area is placed and fixed by adhesion.

Action The shield plate during ignition prevents cooling of the heater, and the fuel diffusion material during steady combustion uniformly vaporizes the fuel at the bottom of the burner.

An embodiment of the present invention will be described below with reference to the drawings.

In the figure, 1 is a pot burner with an upper opening, 1a is a primary air hole provided in the middle of the lower part of the burner side wall, and 1b is a secondary air hole provided on the upper part of the burner side wall. Reference numeral 2 is a heater for preheating ignition provided at the center of the bottom of the burner 1, and is composed of a rod-shaped ceramic heater. Reference numeral 5 denotes a concave shield plate which shields the bottom surface of the heater 2 and both sides in the longitudinal direction. A nozzle 3 for supplying liquid fuel is attached to the side wall of the burner 1 and has a tip opening near the heater 2. Reference numeral 4 denotes a fuel diffusion material according to the present invention, which is made of heat-resistant glass cloth, heat-resistant wire mesh, foam metal or the like, is placed on the bottom of the burner around the shielding plate 5, and is attached and fixed by an adhesive material. As shown in the figure, the fuel diffusion member 4 has a small area 4a on the tip end side of the nozzle 3, that is, on the fuel dropping side,
The area 4b on the opposite side is enlarged so as to substantially follow the shape of the bottom surface of the burner 1.

Reference numeral 6 is an auxiliary burner provided in the upper portion of the burner 1 corresponding to the secondary air hole 1b.

In the above structure, first, when the round bar-shaped heater 2 in the pot burner 1 is energized, the preheating mode is set and the bottom of the burner is heated. After a certain period of time, the fuel becomes the nozzle 3
Is supplied into the burner 1, drops into the fuel diffusing material 4, evaporates and vaporizes in the vicinity of the heater 2, and at the same time, fuel air is introduced into the burner 1 through a large number of primary air holes 1a provided in the side wall of the burner 1. It flows in and is ignited by the heater 2. At this time, since the shield plates 5 are provided on both sides in the longitudinal direction of the heater 2 even if low-temperature air flows in, even if the power supply voltage drops, the heater 2 can be prevented from being cooled, a required temperature can be secured, and ignition can be reliably performed. Can be made.

 Next, the steady combustion will be described.

During steady combustion, the auxiliary burner 6 is heated by the flame in the secondary air hole 1b, and the fuel is evaporated and vaporized by the radiant heat from the auxiliary burner 6, and the combustion is continued. At this time, the fuel is dropped from the nozzle 3 to the small area 4a side of the fuel diffusion material 4 fixed to the bottom of the burner with a heat resistant adhesive. Since the area of the fuel diffusing material 4 is small, the amount of the evaporated fuel vaporizing and evaporating at the drip portion spreads toward the large area 4b of the fuel diffusing material 4, and a part of the fuel evaporatively vaporizing portion is evaporated. It is uniformly evaporated and vaporized at the bottom of the burner.

Therefore, since there is not much temperature difference between the fuel dropping portion side and the opposite side, deformation of the burner bottom portion due to generation of thermal stress can be prevented. Further, since the evaporation and vaporization becomes uniform, a uniform flame can be formed.

Effect of the Invention According to the present invention, it is possible to reliably perform ignition even under adverse conditions, and it is possible to achieve deformation of the burner bottom and uniformization of the flame, which is a great effect.

[Brief description of drawings]

FIG. 1 is a top view of a pot burner according to the present invention, and FIG. 2 is a vertical cross-sectional view of its main part. 1 ... Pot burner, 2 heater, 3 ... Nozzle, 4 ...
Fuel diffusion material, 5 ... Shield plate, 6 ... Burner.

Claims (1)

[Scope of utility model registration request] 1. A heater (2) for preheating and ignition at the bottom of the burner.
In the pot burner having the above, both sides in the longitudinal direction of the heater (2) are shielded by shield plates (5), and a heat resistant fuel diffusion material (4) is placed on the bottom of the burner around the shield plates (5). The pot burner is fixed, and the fuel diffusion material (4) has an area (4a) on the fuel dropping side smaller than an area (4b) on the opposite side.