JP2682432B2 - Oil burning burner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil burning burner having a spray nozzle for spraying oil.

[0002]

2. Description of the Related Art A so-called gun type burner,
In an oil combustion burner equipped with a spray nozzle, oil is sprayed forward by the spray nozzle, and primary air for combustion is supplied from around the spray nozzle for combustion. The combustion air is supplied from the blower into the burner case,
Further, a part of the supplied air is introduced into the air flow partition cylinder and becomes primary air for combustion. On the other hand, the flame detector necessary for detecting the presence or absence of combustion of the oil-fired burner is arranged relatively close to the spray nozzle as a place where it is easy to detect the presence or absence of flame, but the position is the air flow partition tube. Since it is inside, it is normally cooled appropriately by the introduced primary air for combustion and the temperature of the element such as CdS is prevented from becoming high.

[0003]

However, in the above-described conventional apparatus, when the combustion operation is performed with a small capacity, the amount of air blown by the blower is also reduced, so that it is introduced into the air flow partition tube. The amount of the primary air for combustion is small, so that the flame detector is not properly cooled and there is a drawback that the temperature becomes high.

Therefore, an object of the present invention is to solve the above-mentioned drawbacks of the conventional apparatus and to provide an oil burning burner in which the air cooling effect on the flame detector works effectively even when performing small capacity combustion operation.

[0005]

In order to achieve the above object, in an oil burning burner of the present invention, a spray nozzle and an air-flow partition cylinder concentrically surrounding the spray nozzle are arranged in a burner case, and the blower case is connected to the burner case. Part of the air supplied inside is further introduced into the inside from the introduction port provided in the side wall of the air flow partitioning cylinder, so that the introduced air is used as primary air for combustion together with the sprayed petroleum oil from the spray nozzle. A petroleum combustion burner that is fed forward to be used for combustion, and a flame detector is arranged in parallel with the spray nozzle at a position corresponding to the inlet in the air flow partition cylinder, It is characterized in that an air cooling guide is provided upright so as to surround the outer circumference of the flame detector from the inner wall of the air flow partition cylinder having the inlet.

[0006]

[Operation] When the combustion operation is started, the air sent from the blower is supplied into the burner case, and a part of it is introduced into the air flow partition tube with the spray nozzle, and forward with the spray oil from the spray nozzle. Sent to and used for combustion. And the air flow entering from the inlet of the air flow partition cylinder corresponding to the position of the flame detector flows along an air cooling guide surrounding the outer periphery of the flame detector, and after cooling the flame detector from its outer peripheral wall. , Flows toward the spray nozzle side and is sent forward together with the spray oil by the negative pressure suction force of the spray. Since the air flow introduced into the air flow partition tube from the inlet is guided by the air cooling guide, it is possible to contact the flame detector with sufficient contact time and contact area from the outer periphery of the flame detector. The cooling effect is improved even with a small air flow. In addition, the flame detector is placed parallel to the spray nozzle, and its outer circumference is surrounded by the air-cooling guide.By making the tip of the flame detector close to the flame direction, it becomes easier to detect the flame and it is used for combustion. The primary air stream can be provided for cooling while flowing along the flame detector and forward with the spray nozzles.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a sectional view showing the essential part of an oil burning burner according to the present invention, and FIG. 2 is a sectional view for explaining the mounting state of an air cooling guide.

Reference numeral 10 denotes a burner case, and a blower supply port 20 of a blower (not shown) is connected to an upper surface 10a of the burner case 10. Inside the burner case 10, a spray nozzle 30 for spraying petroleum in the forward direction, a first air flow partition tube 40 concentrically surrounding the spray nozzle 30, and an outside of the first air flow partition tube 40 are provided. The second air flow partitioning cylinder 50 that is further provided concentrically
And are arranged. On the front surface 10b of the burner case 10, a combustion cylinder including a small diameter combustion cylinder 61 and a large diameter combustion cylinder 62 is attached. The holder 31 of the spray nozzle 30 is integrally molded with the back cover 10c of the burner case 10 or is fixed as a separate member. Further, a flame detector 70 is fixed to the back cover 10c, and the rear end portion of the first air flow partitioning cylinder 40 is joined thereto.

A flame detector 70 is arranged in parallel to the spray nozzle 30 and its holder 31, and the flame detector 70 has an element such as CdS for detecting a flame at the tip of the flame detector 70 directed toward the flame in front of the nozzle 30. It is distributed. 80 is an igniter. The first half of the first air flow partitioning cylinder 40 is composed of an outer cylinder 41 and an inner cylinder 42, and the inner cylinder 42 is constricted forward in a cone shape, and its tip has the small diameter combustion. It extends to the jet port 63 provided at the center of the base surface 61a of the cylinder 61. The air introduced into the first air flow partition cylinder 40 is guided by the inner cylinder 42, flows toward the spray nozzle 30, and is sucked by the negative pressure generated by the spray from the spray nozzle 30, and together with the spray oil. It is sent forward through the spout 63. On the side peripheral wall on the rear end side of the first air flow partitioning cylinder 40, a plurality of inlets 43 for introducing air are provided at appropriate intervals in the circumferential direction. An air port 44 is provided in the outer cylinder 41. The second air flow partitioning cylinder 50 is joined to the front surface 10b of the burner case 10 at its tip end and is opened inside the burner case 10 at its rear end. A flame holder 64 is provided around the ejection port 63 on the base surface 61a of the small-diameter combustion tube 61. Further, air holes 61b, 62b are provided in the side peripheral walls of the small-diameter combustion cylinder 61 and the large-diameter combustion cylinder 62.

The flame detector 70 is located inside the first airflow partition tube 40 and at a position corresponding to one of the plurality of inlets 43 of the first airflow partition tube 40. Nozzle 30
And is arranged parallel to the holder 31. An air-cooling guide 90 is erected on the flame detector 70 so as to surround the outer circumference of the flame detector 70 from the inner wall of the first air flow partitioning cylinder 40. The air-cooling guide 90 has a section U with an appropriate width.
The U-shaped pair of tip surfaces 91, 91 is made of a U-shaped member.
Is erected so as to straddle the introduction port 43 with respect to the inner wall of the first air flow partitioning cylinder 40, and is in contact with the back lid 10c of the burner case 10 at one base end face in the width direction. It is configured. The inlet port 43 at the position corresponding to the flame detector 70 may have a larger diameter than the inlet ports 43 at other positions.

When the operation is started, air is supplied from the blower to the burner case 10 through the blower supply port 20. A part of the air flow is introduced into the first air flow partition tube 40 through the introduction port 43. The remaining air flow enters the second air flow partition cylinder 50, and a part of it enters the outer cylinder 41 through the air port 44 of the outer cylinder 41, passes through the flame holder 64, and enters the small diameter combustion cylinder 61. be introduced. The remaining air flow is introduced into the combustion tubes 61, 62 through the air hole 61b of the small-diameter combustion tube 61 and the air hole 62b of the large-diameter combustion tube 62, respectively.

The air that has entered the first airflow partition tube 40 through one of the inlets 43 first comes into contact with the side surface of the flame detector 70 and along the air cooling guide 90 of the flame detector 70. The flame detector 70 also circulates to the back side and flows forward along the flame detector 70 while cooling the flame detector 70 from the entire surface of the outer periphery thereof, while the flame detector 70 has a sufficient contact area and sufficient contact time.
To cool. The air flow that has finished cooling the flame detector 70 flows to the spray nozzle 30 side together with other air flows, is sucked by the negative pressure of the sprayed petroleum sprayed forward from the spray nozzle 30, and is jetted together with the sprayed petroleum 63 Is sent to the small-diameter combustion tube 61 side.

[0013]

According to the petroleum combustion burner according to the first aspect of the present invention, the flame detector is parallel to the spray nozzle at a position corresponding to the inlet of the air flow partition tube. In addition, since the air-cooling guide is erected from the inner wall of the air flow partition cylinder having the inlet so as to surround the side circumference of the flame detector, the air introduced into the air flow partition from the inlet. The flow can be brought into contact with the outer peripheral surface of the flame detector by the air-cooling guide, and can be made to flow in the direction of the spray nozzle along the flame detector, thus providing a sufficient contact time and contact area. Since they can be brought into contact with each other, it is possible to sufficiently cool the flame detector even with a small amount of air flow at the time of low capacity operation. In addition, the flame detector is placed parallel to the spray nozzle, and its outer circumference is surrounded by the air-cooling guide.By making the tip of the flame detector close to the flame direction, it becomes easier to detect the flame and it is used for combustion. An air flow that is the primary air can smoothly flow along the flame detector and toward the front where the spray nozzle is located.

[Brief description of the drawings]

FIG. 1 is a cross-sectional configuration diagram showing a main part of an oil burning burner of the present invention.

FIG. 2 is a cross-sectional view illustrating an attached state of an air cooling guide.

[Explanation of symbols]

 10 Burner case 20 Blower supply port from blower 30 Spray nozzle 40 First air flow partition tube 43 Inlet port 50 Second air flow partition tube 61 Small diameter combustion tube 62 Large diameter combustion tube 63 Jet outlet 70 Flame detector 80 Ignition device 90 Air cooling guide

Claims (1)

(57) [Claims] 1. A spray nozzle and an air flow partition tube concentrically surrounding the spray nozzle are arranged in the burner case, and a part of the air supplied from the blower into the burner case is further provided on a side wall of the air flow partition tube. An oil combustion burner in which the introduced air is introduced into the interior through a provided introduction port so that the introduced air is forwarded as combustion primary air together with atomized oil from the atomizing nozzle to be used for combustion. A flame detector is arranged in parallel with the spray nozzle at a position corresponding to the introduction port in the air flow partition cylinder, and a side circumference of the flame detector from the inner wall of the air flow partition cylinder having the introduction port. An oil-fired burner characterized in that an air-cooling guide was erected to surround the.