JPH0125856Y2 - - Google Patents

Description

[Detailed description of the invention] [Technical field of the invention] This invention relates to an oil burner suitable for oil hot air heaters, etc. More specifically, this invention relates to an oil burner suitable for oil hot air heaters, etc. This relates to an oil burner that feeds oil evenly.

[Technical background of the invention] Generally, an air supply casing for feeding combustion air into the vaporization chamber is coaxially provided at the bottom of a burner cylinder that forms a vaporization chamber inside.
In oil hot air heaters, etc., where the indoor air circulation fan and the combustion air fan are rotationally driven by the same motor, an air duct is routed from the combustion air fan and its end section is is connected to the side wall of the air supply casing in order to keep the overall height of the device as low as possible. Therefore, after the combustion air is sent from the side of the air supply casing via the air duct,
The air changes direction and flows into the burner cylinder through a communication hole bored approximately in the center of the upper wall of the air supply casing. However, according to this, most of the combustion air enters from the side of the air supply casing and exits directly upwards, which can cause unbalanced air flow within the vaporization chamber, resulting in uneven combustion flame. It was hot. To prevent this, it would be possible to make the communication hole in the air casing with respect to the burner cylinder smaller, but this would increase ventilation resistance and require a fan with a large air blowing capacity, which would reduce the cost. unfavorable to On the other hand, there is also a system in which the air supply casing is constructed in two stages and a buffer chamber is provided in the middle, but this does not allow for an increase in the height of the entire device and is also unfavorable in terms of cost.

[Purpose of the invention] This invention was created in view of the above-mentioned drawbacks of the conventional technology.The purpose of this invention is to feed combustion air into the vaporization chamber of the burner tube in a well-balanced manner without increasing the size or cost of the entire device. An object of the present invention is to provide an oil burner which is capable of providing a fuel supply pipe with excellent installation workability.

[Examples] Hereinafter, this invention will be described in detail with reference to embodiments shown in the accompanying drawings.

This oil burner includes a burner cylinder 1 having a preheater 2 wrapped around its outer peripheral wall and a vaporizing chamber 3 formed inside. An air supply casing 4 for supplying combustion air into the vaporization chamber 3 is coaxially disposed below the burner cylinder 1 with a heat insulating material 5 interposed therebetween. That is, this air supply casing 4 has a communication hole 6 bored at approximately the center of its upper wall portion 4a so as to communicate with the vaporization chamber 3, and has a combustion air blower (not shown) in its side wall portion 4b. An air duct 7 extending from the fan is connected. Further, a motor 15 is attached to approximately the center of the bottom plate 4c of the air supply casing 4, and its rotating shaft 8 penetrates through the air supply casing 4 and projects into the vaporization chamber 3. In the vaporization chamber 3, a rotating shaft 8
A rotary cup 9 is fixed to the shaft end of the rotary cup 9 so as to be able to rotate integrally therewith.The rotary cup 9 has a mortar shape with an open bottom as shown in the figure, and a fuel supply pipe is connected from the bottom opening of the rotary cup 9. 10
The discharge side end 10a of the cup is retracted so as to be close to the inner surface of the cup.

According to this invention, a buffer tube 1 is provided at the periphery of the communication hole 6 in the air supply casing 4.
1 is provided so as to protrude into the air supply casing 4. In this case, the buffer tube 11 is integrally molded with the upper wall portion 4a of the air supply casing 4, but it is of course possible to form a cylinder in advance and attach it to the periphery of the communication hole 6. .

In the above configuration, combustion air is fed into the air casing 4 from the side through the air duct 7 from a combustion air blowing fan (not shown), and is then turned and flows into the vaporization chamber 3 through the communication hole 6. However, in this invention, as mentioned above, since the buffer cylinder 11 is provided around the periphery of the communication hole 6, there is almost no air flow that directly flows into the vaporization chamber 3, and the air flow is not uniform in that part. After that, it flows into the vaporization chamber 3. Therefore, an imbalance of air flow does not occur in the vaporization chamber 3, and a uniform and clean combustion flame can be obtained.

In addition, in this invention, an inverted U-shaped groove 12 is provided at the lower end edge of the buffer cylinder 11, and the fuel supply pipe 10 is fitted into this groove 12 and brazed. As shown in FIG. 2, a part of the fuel supply pipe 10 is held in this buffer tube 11. In that case, in order to improve the installation workability of the fuel supply pipe 10, the second
As shown in the figure, for the groove 12
It is preferable to provide another groove 12' at a position 180 degrees opposite to each other. That is, the fuel supply pipe 10 is brazed to the buffer tube 11 as shown in the figure before being covered with the bottom plate 4c of the air supply casing 4, but one end of the fuel supply pipe 10 protrudes outside the air supply casing 4. Because of its long length, it is not easy to insert one end into the insertion hole 13 bored in the air supply casing 4 while projecting the other end of the discharge end 10a upward through the communication hole 6. do not have. On the other hand, if the grooves 12 and 12' are provided 180 degrees opposite to each other, as shown in FIG.
With 0a facing downward, grooves 12 and 1
2', and then, in that state, slide it to the right in the figure to insert one end of the fuel supply pipe 10 into the insertion hole 13. Thereafter, if the fuel supply pipe 10 is rotated 180 degrees, the discharge end 10a will protrude upward from the communication hole 6 as shown in FIG. 1, which is extremely convenient for assembling the fuel supply pipe 10. However, in order to realize such a mounting method, it is necessary that the insertion hole 13 exist on an imaginary extension line connecting the grooves 12 and 12'. Reference numeral 14 is a collar provided on the fuel supply pipe 10, and the attachment position of the fuel supply pipe 10 to the buffer tube 11 is determined by this collar 14.

[Effects] As is clear from the description of the embodiments described above, according to this invention, the buffer cylinder 11 is attached to the periphery of the communication hole 6 in the air supply casing 4.
By the extremely simple means of protruding inward, combustion air can be made to flow uniformly within the vaporization chamber 3 without increasing the height of the entire device or increasing costs.

Furthermore, a pair of grooves 1 are provided on the lower edge of the buffer cylinder 11.
2 and 12' are formed, the fuel supply pipe 10 can be easily installed while positioning, and other effects are remarkable.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view showing an embodiment of this invention, and FIG. 2 is an exploded perspective view for explaining how the fuel supply pipe is attached to the buffer tube shown in FIG. 1. . In the figure, 1 is a burner tube, 3 is a vaporization chamber, 4 is an air supply casing, 6 is a communication hole, 7 is a motor, 8 is a rotating shaft, 9 is a rotary cup, 10 is a fuel supply pipe, 11 is a buffer tube, 12 , 12' are grooves, and 13 is an insertion hole.

Claims (1)

[Claims for Utility Model Registration] A burner tube that forms a vaporizing chamber inside, a communication hole connected to the burner tube in the upper wall, and an air duct extending from combustion air blowing means in the side wall. an air supply casing connected to the burner cylinder and arranged coaxially at the lower part of the burner cylinder; and a rotary member attached to a substantially central portion of the bottom plate of the air supply casing and projecting through the air supply casing into the vaporization chamber. a motor having a shaft; a rotary cup in the shape of a mortar with an open bottom that is attached to the shaft end of the rotating shaft so as to rotate integrally within the vaporization chamber; and supplying liquid fuel into the rotary cup. In the oil burner equipped with a fuel supply pipe, a buffer tube is provided around the communication hole of the air supply casing to equalize the flow of combustion air flowing into the burner cylinder through the communication hole. It is provided so as to protrude into the air supply casing, and inverted U-shaped grooves are formed at 180 degree intervals on the lower edge of the buffer cylinder to determine the mounting position of the fuel supply pipe. An oil burner characterized by: