JPH09210312A - Liquid fuel combustion device - Google Patents

Abstract

(57) Abstract: It is possible to provide a liquid fuel combustion apparatus capable of preventing leakage of liquid fuel to the outside of a heat exchanger even when there is variation in horizontality during installation. A heat exchanger (3) having a combustion chamber (11) formed therein, and a mounting port portion (19) provided on a side wall of the heat exchanger (3).
The gun type burner 5 attached to the gun type burner 5 and the blower 6 for supplying combustion air to the gun type burner 5. And the gun type burner 5 is the burner tube 2
1, an attachment plate 34 provided at the base end of the burner tube 21, an inner cylinder 23 housed in the burner tube 21 and provided with air holes 22A in the peripheral wall, and an ejection port in the inner cylinder 23. It is a liquid fuel combustion device configured with a liquid fuel ejection nozzle 24 facing a portion 24A. And
The gun-type burner 5 is provided with a weir 38 for preventing liquid fuel backflow at a proper position on the base end side of the burner tube 21.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid fuel combustion apparatus such as an oil water heater, an oil hot water heating heat source machine, and an oil heater, and more particularly to a liquid fuel combustion apparatus equipped with a gun type burner.

[0002]

2. Description of the Related Art Generally, a liquid fuel combustion apparatus of this type has a heat exchanger in which a water chamber is formed between an inner case and an outer case and a combustion chamber is formed inside the inner case. At the lower part of the side wall of this heat exchanger, there is provided a mounting port through which a burner is inserted, and at the mounting port, a gun type burner having a burner tube and a liquid fuel injection nozzle provided in this burner tube is horizontally arranged. Since the structure is attached, when the liquid fuel ejected from the liquid fuel ejection nozzle has a phenomenon of entrainment or when the liquid fuel ejection nozzle is drooled when the ejection is stopped, the liquid fuel is burned. There is a problem that the heat is accumulated in the tube, and a part of the water permeates into the packing interposed between the base end of the burner tube and the mounting flange of the mounting port and leaks to the outside of the heat exchanger.

Therefore, in order to solve the above problems,
In the liquid fuel combustion apparatus disclosed in Japanese Unexamined Patent Publication No. 7-174413, heat exchange of liquid fuel is performed by attaching a gun type burner to the attachment opening so as to incline a few degrees obliquely downward toward the combustion chamber. It was intended to prevent leakage to the outside of the vessel and improve safety.

[0004]

However, even in the liquid fuel combustion apparatus disclosed in Japanese Patent Application Laid-Open No. 7-174413, for example, when the equipment is installed, if the levelness varies, the gun-type burner. In some cases, even if the fuel cell was tilted obliquely downward to the combustion chamber by several degrees, it was not possible to absorb the variation in the levelness during installation, and it could not be possible to prevent the liquid fuel from leaking out of the heat exchanger. .

The present invention has been made in view of the above circumstances, and liquid fuel combustion capable of preventing leakage of liquid fuel to the outside of the heat exchanger even when the levelness varies during installation. The purpose is to be able to provide the device.

[0006]

According to the present invention as set forth in claim 1, there is provided a heat exchanger having a combustion chamber formed therein, and a gun attached to a mounting opening provided on a side wall of the heat exchanger. A type burner and a blower for supplying combustion air to the gun type burner are provided, and the gun type burner is housed in the burner tube, a mounting plate provided at a base end portion of the burner tube, and the burner tube, In a liquid fuel combustion apparatus including an inner cylinder having air holes in its peripheral wall and a liquid fuel ejection nozzle having an ejection port facing the inner cylinder, the gun-type burner includes a burner tube This is a structure in which a weir for preventing backflow of the liquid fuel is provided at an appropriate position on the base end side.

According to the second aspect of the present invention, a heat exchanger having a combustion chamber formed therein, a gun-type burner attached to a mounting opening provided on a side wall of the heat exchanger,
The gun-type burner includes a blower for supplying combustion air to the gun-type burner. The gun-type burner includes a burner tube, a mounting plate provided at a base end portion of the burner tube, and the burner tube. In a liquid fuel combustion apparatus comprising an inner cylinder provided with a liquid fuel ejection nozzle with an ejection port facing the inner cylinder, the gun-type burner includes a burner tube at a base end side. A weir for preventing backflow of the liquid fuel is provided at an appropriate position, and this weir is provided so that a part of the burner tube is projected inward by press working.

According to the third aspect of the present invention, a heat exchanger having a combustion chamber formed therein, and a gun type burner attached to a mounting opening provided on a side wall of the heat exchanger are provided.
The gun-type burner includes a blower for supplying combustion air to the gun-type burner. The gun-type burner includes a burner tube, a mounting plate provided at a base end portion of the burner tube, and the burner tube. In a liquid fuel combustion apparatus comprising an inner cylinder provided with a liquid fuel ejection nozzle with an ejection port facing the inner cylinder, the gun-type burner includes a burner tube at a base end side. A weir for preventing backflow of the liquid fuel is provided at an appropriate position, and is provided so as to be inclined obliquely downward toward the combustion chamber.

In the liquid fuel combustion apparatus of claim 1,
The gun-type burner has a weir for liquid fuel backflow prevention at a proper position on the base end side of the burner tube.Therefore, by setting the weir height arbitrarily, the weir level can be adjusted when installing the equipment. Even if there is variation, the liquid fuel that has dripped from the air holes in the inner cylinder to the inner bottom of the burner tube is blocked by the weir from flowing to the connection between the burner tube and the mounting plate, and evaporates at the inner bottom of the burner tube. Or the flow to the combustion chamber side of the heat exchanger prevents leakage to the outside of the heat exchanger.

In the liquid fuel combustion apparatus of claim 2,
In the gun type burner, a weir for preventing liquid fuel backflow is provided at an appropriate position on the base end side of the burner tube, and the weir is provided by protruding a part of the burner tube inward by press working. Therefore, not only can the liquid fuel be prevented from leaking to the outside of the heat exchanger, but the weir does not require any additional components, and the number of components can be prevented from increasing.

In the liquid fuel combustion apparatus of claim 3,
The gun-type burner has a weir for liquid fuel backflow prevention at a proper position on the base end side of the burner tube, and is provided obliquely downward toward the combustion chamber. It is possible to further absorb the variation in the levelness due to the synergistic effect of the slant and the weir.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings of FIGS. 1 to 6, reference numeral 1 denotes an exterior body of a petroleum hot water heating heat source machine as an example of an embodiment, and the exterior body 1 includes a bottom plate 1A, a top plate 1B,
It is composed of a peripheral side plate 1C and a detachable front plate 1D, and on one side in the exterior body 1, a support base 2 mounted on the bottom plate 1A, and a vertically long position mounted and fixed on the support base 2. Cylindrical can 3 and silencer 4 connected to the upper part of the can 3.
, A gun type burner 5 for heating the can body 3, and a blower 6 connected to the gun type burner 5 for supplying combustion air to the gun type burner 5 on the other side of the exterior body 1. , And an air supply pipe 7 made of synthetic resin, the lower part of which is connected to the suction port of the blower 6.

The can body 3 is composed of an inner case 8, an outer case 9 and a plurality of smoke tubes 10, 10 and the like. Inside the inner case 8, a combustion chamber 11 facing the tip of the gun type burner 5 is formed. Is formed, and a liquid chamber 12 for storing the heat transfer liquid is formed between the inner case 8 and the outer case 9. Reference numeral 13 is an exhaust pipe provided in the silencer 4. Then, the heat transfer medium heated in the liquid chamber 12 passes through the going pipe 14 and a circulating pipe (not shown) connected to the going pipe 14 by driving a circulating pump (not shown). , To an external radiator (not shown) such as a floor heating panel, a fan convector, etc., heat is exchanged there, and then returned to the liquid chamber 12 again.

The upper part of the going pipe 14 is provided with a gas-liquid separating section 15
The thin pipe 1 is provided on the top of the gas-liquid separation unit 15.
A bidirectional pressure control valve device 18 communicating with the reserve tank 17 via 6 is equipped. Reference numeral 19 denotes a hollow cylindrical mounting port cylinder provided on the side wall of the can body 3. An annular mounting flange 20 is provided on the outer periphery of the base end portion of the mounting port cylinder 19 projecting to the side of the can body 3. It is provided.

The gun type burner 5 includes a cylindrical burner tube 21 to which combustion air is supplied from a blower 6,
An inner cylinder 23 housed in the burner tube 21 and provided with a plurality of primary air holes 22A, 22A, 22B on the peripheral wall and the bottom wall, and an ejection port portion 2 penetrating the bottom wall of the inner cylinder 23.
Liquid fuel injection nozzle 24 with 4A facing the inner cylinder 23
A spark plug 25, a fixture 26 for fixing the liquid fuel jet nozzle 24 and the spark plug 25 to the inner cylinder 23, a funnel-shaped ring plate 27 fixed to the tip of the inner cylinder 23, and a plurality of peripheral walls. Having secondary air holes 28, 28, 29, 29,
The combustion cylinder 30 is provided in the burner tube 21 in front of the ejection nozzle 24, and is located in front of the ejection port 24A of the spray nozzle 24, and is attached to the base end of the combustion cylinder 30. It comprises a stabilizer 31 and an annular connecting plate 32 which connects the tip of the burner tube 21 and the tip of the combustion tube 30.

An outward flange 21A is provided at the base end of the burner tube 21, and the outward flange 2A is provided.
1A is a ring-shaped inclined plate 3 as shown in FIGS.
The mounting plate 34 is mounted via screws 3 (not shown). Reference numeral 34A is a connecting cylinder portion provided substantially at the center of the mounting plate 34. Then, as shown in FIG. 2, the mounting plate 34 is fixed to the mounting flange 20 of the mounting port cylinder 19 with a plurality of bolts 36 and nuts (not shown) through an annular packing 35, thereby Gun type burner 5
Is attached to the attachment port cylinder 19 such that the tip end thereof is inclined obliquely downward toward the combustion chamber 11, and its inclination angle θ1 is set to about 2 to 5 degrees with respect to the horizontal line a. ing. Reference numerals 37 and 37 are insertion holes provided in the mounting plate 33 so as to correspond to the bolts 36.

Further, the burner tube 21 has a height H of about 4 to 5 at an inner bottom portion between a position directly below a primary air hole 22A provided in a peripheral wall of the inner cylinder 23 and the outward flange 21A. A weir 38 set to 6 mm is provided, and this weir 38 is provided by projecting inward a part of the base end side of the burner tube 21 near the outward flange 21A by press working.

Further, the support base 2 has a mounting surface portion 2A on an upper portion thereof, and the mounting surface portion 2A corresponds to an annular lower flange 39 integrally formed at the lower end of the can body 3. Four
Individual protrusions 40, 40, 41, 41 are provided. Then, of these protrusions 40, 40, 41, 41, the height of the front protrusions 40, 40 located on the side of the mounting mouth cylinder 19 of the can body 3 is greater than the height of the rear protrusions 41, 41. By setting it high, the upper part of the can body 3 is slightly inclined toward the opposite side of the mounting port cylinder 19 and the screws 42, 4 are attached to the support base 2.
2 is stopped, and its inclination angle θ2 is about 1 with respect to the vertical line b.
It is set to ~ 2 degrees.

In the above structure, the gun type burner 5
When the operation of the blower 6 is started, the blower 6 is first driven, the combustion air from the blower 6 is supplied into the burner tube 21 of the gun-type burner 5, and a part of the combustion air supplied into the burner tube 21 is , Primary air holes 22A, 22
B flows into the inner cylinder 23 as primary air, and the rest flows from the secondary air holes 28, 28, 29, 29 into the combustion cylinder 30 as secondary air. Here, when the electromagnetic pump (not shown) is driven, the ejection port portion 24A of the liquid fuel ejection nozzle 24
Liquid fuel is ejected from the fuel tank, and the ejected liquid fuel mixes with the primary air and is ignited by the discharge spark of the spark plug 25, whereby the gun-type burner 5 forms a flame F in the combustion chamber 11 of the can body 3. Start burning. The high-temperature exhaust gas burned in the combustion chamber 11 emits smoke tubes 10, 1
After passing through 0, heat is exchanged with the heat medium liquid in the liquid chamber 12, and then discharged through the silencer 4 from the exhaust pipe 13 to the outside of the exterior body 1.

According to the present embodiment, the burner tube 21 of the gun-type burner 5 has an inner portion between the position immediately below the primary air hole 22A provided in the peripheral wall of the inner cylinder 23 and the outward flange 21A. Since the weir 38 whose height H is set to about 4 to 6 mm is provided at the bottom, for example, in the longitudinal direction of the bottom plate 1A of the exterior body 1, the side of the support base 2 on which the can body 3 is mounted and fixed is opposite. When the petroleum hot water heating heat source machine is installed in a state slightly higher than the support base 2 side, the liquid fuel dropped from the primary air holes 22A of the inner cylinder 23 to the inner bottom portion of the burner tube 21 has an outward flange. The flow to the portion 21A is stopped by the weir 38. The liquid fuel stopped by the weir 38 evaporates at the inner bottom portion of the burner tube 21 or flows out to the combustion chamber 11 side of the can body 3, so that the can body 3 is prevented from leaking to the outside.

The weir 38 is the burner tube 21.
Since a part of the protrusion is provided by projecting inward by press working, it is not necessary to prepare a component forming the weir 38 separately from the burner tube 21, and it is possible to prevent the number of components and the number of assembly steps from increasing. The structure is simplified.

Further, since the gun type burner 5 is provided so as to incline downward by about 2 to 5 degrees toward the combustion chamber 11 of the can body 3, the level of horizontalness when installing the oil hot water heating heat source device The variations can be further absorbed by the synergistic effect of the inclination of the gun-type burner 5 obliquely downward and the weir 32.

Further, in the above-mentioned embodiment, four protrusions 40, 40, 41, 41 are provided on the mounting surface portion 2A of the support base 2 corresponding to the lower flange 39 of the can body 3. Of these protrusions 40, 40, 41, 41, the can body 3 is provided.
By setting the height of the front protrusions 40, 40 located on the side of the attachment port cylinder 19 to be higher than the height of the rear protrusions 41, 41, the can body 3 is attached to the vertical line b. Since it is configured to be mounted and fixed on the support base 2 with an inclination of about 1 to 2 degrees toward the opposite side of the cylinder 19, the can body 3 of the can 3 due to the load of the gun type burner 5 and the blower 6 applied to the mounting cylinder 19 is attached. After the inclination is absorbed, the can body 3 can be prevented from inclining after the gun type burner 5 and the blower 6 are mounted.

FIG. 7 shows another embodiment, in which two protrusions 43, 43 corresponding to the lower flange 39 of the can 3 are provided on the mounting surface 2A of the support base 2. By providing only the front of the can body 3 which is located on the side of the mounting port cylinder 19,
With respect to the vertical line (b), the can body 3 is tilted about 1 to 2 degrees toward the opposite side of the mounting port cylinder 19, and is mounted and fixed on the support base 2. The inclination of the can body 3 due to the load of the blower 6 or the like may be absorbed.

[0025]

In the liquid fuel combustion apparatus according to the first aspect of the present invention, since the gun-type burner is provided with the weir for preventing the backflow of the liquid fuel at the proper position on the base end side of the burner tube, the equipment is installed. Even if there are variations in the levelness, the weir can receive the liquid fuel that has dripped from the air holes in the inner cylinder to the inner bottom of the burner tube, and the heat exchange of the liquid fuel can be received without being significantly affected by the installation condition. Leakage to the outside of the device can be prevented, further improving safety.

In the liquid fuel combustion apparatus of claim 2,
In the gun type burner, a weir for preventing liquid fuel backflow is provided at an appropriate position on the base end side of the burner tube, and the weir is provided by protruding a part of the burner tube inward by press working. Therefore, not only can the liquid fuel be prevented from leaking to the outside of the heat exchanger, but the weir does not require any additional components, and the number of components can be prevented from increasing.

In the liquid fuel combustion apparatus of claim 3,
The gun-type burner has a weir for liquid fuel backflow prevention at a proper position on the base end side of the burner tube, and is provided obliquely downward toward the combustion chamber. The variation in the levelness can be further absorbed by the synergistic effect of the slant of the gun-type burner and the weir, and the safety is further improved.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of essential parts of a petroleum hot water heating heat source device showing an embodiment of a liquid fuel combustion apparatus according to the present invention.

FIG. 2 is a sectional view of the same gun type burner.

FIG. 3 is a sectional view of an oil hot water heating heat source device.

FIG. 4 is a perspective view showing a state where the can body is attached to the support base.

FIG. 5 is a side view showing a state where the can body is also attached to the support base.

FIG. 6 is a plan view showing a state in which a support base is similarly attached to the bottom plate.

FIG. 7 is a plan view of another exemplary embodiment.

[Explanation of symbols]

 3 Can Body (Heat Exchanger) 5 Gun Type Burner 6 Blower 11 Combustion Chamber 19 Mounting Cylinder (Mounting Port) 21 Burner Tube 22A Primary Air Hole (Air Hole) 23 Inner Cylinder 24 Liquid Fuel Spouting Nozzle 24A Spouting Port 34 Mounting plate 38 weir

Claims (3)

[Claims] 1. A heat exchanger having a combustion chamber formed therein,
A gun type burner attached to a mounting opening provided on the side wall of the heat exchanger, and a blower for supplying combustion air to the gun type burner are provided.
A burner tube, a mounting plate provided at the base end of the burner tube, an inner cylinder housed in the burner tube and provided with air holes in the peripheral wall, and an ejection port portion facing the inner cylinder. In a liquid fuel combustion apparatus configured with a liquid fuel jet nozzle, the gun-type burner is characterized in that a weir for preventing liquid fuel backflow is provided at an appropriate position on the base end side of the burner tube. Fuel combustion device. 2. A heat exchanger having a combustion chamber formed therein,
A gun type burner attached to a mounting opening provided on the side wall of the heat exchanger, and a blower for supplying combustion air to the gun type burner are provided.
A burner tube, a mounting plate provided at the base end of the burner tube, an inner cylinder housed in the burner tube and provided with air holes in the peripheral wall, and an ejection port portion facing the inner cylinder. In the liquid fuel combustion apparatus including a liquid fuel jet nozzle, the gun-type burner is provided with a weir for liquid fuel backflow prevention at an appropriate position on the base end side of the burner tube, and the weir is the burner tube. A liquid fuel combustion apparatus, characterized in that a part thereof is provided so as to protrude inward by press working. 3. A heat exchanger having a combustion chamber formed therein,
A gun type burner attached to a mounting opening provided on the side wall of the heat exchanger, and a blower for supplying combustion air to the gun type burner are provided.
A burner tube, a mounting plate provided at the base end of the burner tube, an inner cylinder housed in the burner tube and provided with air holes in the peripheral wall, and an ejection port portion facing the inner cylinder. In the liquid fuel combustion device configured with a liquid fuel jet nozzle, the gun-type burner is provided with a weir for preventing liquid fuel backflow at an appropriate position on the base end side of the burner tube, and is directed toward the combustion chamber. A liquid fuel combustion apparatus, which is provided obliquely downward.