JP3407100B2 - Liquid fuel combustion device - Google Patents

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 that vaporizes and burns liquid fuel.

[0002]

2. Description of the Related Art As an example of a liquid fuel combustion apparatus that vaporizes and burns liquid fuel, for example, Japanese Patent Laid-Open No. 14951/1993.
There is an invention disclosed in Japanese Patent No. 4 publication, which is shown in FIG. In the figure, 1 is a vaporizer provided in a combustor of a liquid fuel combustion apparatus, and has a vaporization chamber 1a for vaporizing liquid fuel, and 2 is buried in a side wall of the vaporizer 1, and the vaporizer 1
An electric heater 3 for heating an electric heater, 3 is a throttle portion fitted and fixed to the upper portion of the carburetor 1, 4 is a burner head provided on the upper portion of the throttle portion 5, and 5 is a plurality of flames provided on the side wall of the burner head 4. A hole, 6 is a wire mesh closely wound on the outer peripheral surface of the side wall of the burner head 4, and 7 is a screw for fixing the burner head 4 to the vaporizer 1. 8 is provided in the burner head 4,
The mixing plate having a plurality of holes on the top and bottom surfaces has a function of rectifying vaporized liquid fuel and ejecting it from a plurality of flame holes 5. Reference numeral 9 is an annular flame holding ring attached to the upper part of the vaporizer 1 so as to surround the outer periphery of the burner head 4.
Is a vaporizer cover provided so as to cover the side wall of the vaporizer 1, and is attached by a screw 26.

Reference numeral 11 denotes a nozzle integrally formed in the lower part of the side wall of the carburetor 1 and provided substantially horizontally with respect to the bottom surface of the carburetor 1. The outlet portion 11c side of the nozzle projects into the vaporization chamber 1a and opens. The inlet portion 11a side is communicated with an air supply passage 13 formed between the side wall of the carburetor 1 and the carburetor cover 10 and connected to the combustion blower 12. Further, the inner peripheral surface 11b of the nozzle 11 is formed in a tapered shape so that the diameter thereof is expanded toward the outside of the carburetor 1. 14 is inserted into the fuel tank 15 on the base end side and the carburetor cover 1 on the front end side.
0 is an oil feed pipe that is provided coaxially with the nozzle 11 by penetrating the through hole 10a provided at 0, and the tip end side thereof is a base end member 14a made of a material having a high thermal conductivity and a low thermal conductivity. Nozzle portion 14A including a tip member 14b made of a material
Is formed so as to project from the outlet portion 11c of the nozzle 11, and the base portion side of the nozzle portion 14A has a sealing function for the through hole 10a of the carburetor cover 10. Prepared oil pipe 1
A positioning bulging portion 14d that is locked to the carburetor cover 10 when the No. 4 is installed is formed. A fuel pump 17 that sucks up the liquid fuel 16 in the fuel tank 15 and ejects it from the ejection port 14c is provided in the middle of the oil supply pipe 14.

Reference numeral 18 is a bulging portion 14d for positioning the oil supply pipe 14.
Is a support member for supporting the oil supply pipe 14 outside the carburetor 1 by pressing against the through hole 10a side of the carburetor cover 10, and is attached to the side walls of the carburetor cover 10 and the carburetor 1 by screws 19. . Reference numeral 20 is a temperature detector which is attached to the side wall of the carburetor 1 and the carburetor cover 10 above the oil feeding pipe 14 to detect the temperature of the carburetor 1, 21 is an ignition device arranged near the flame hole 5, and 22 is a flame. It is a detection rod.

In the liquid fuel fuel apparatus thus constructed, when the power switch (not shown) provided in the apparatus is turned on, the electric heater 2 is energized to heat the side wall of the carburetor 1 and The detector 20 preheats until the temperature required for vaporizing the liquid fuel 16, for example, 200 to 300 ° C. is detected. When the preheating is completed, the combustion blower 12 is driven to send the combustion air to the air supply passage 13 and the nozzle 11 supplies the combustion air to the vaporization chamber 1a. At the same time, the fuel pump 17 is driven so that the primary air ratio (= supply air amount / theoretical air amount) from the ejection port 14c of the tip member 14b of the oil feed pipe 14 is increased.
Is supplied to the vaporization chamber 1a in an amount of about 0.8.

The supplied liquid fuel 16 is vaporized by the heat of the vaporizer 1 which has been atomized and preheated by the flow of combustion air. The vaporized liquid fuel 16 is mixed with the combustion air when passing through the throttle portion 3 to have a uniform concentration distribution. Then, the mixture of the vaporized fuel and the combustion air is mixed into a plurality of gas on the bottom surface of the mixing plate 8. It is rectified by passing through the holes. At this time, due to the effect of the side wall of the mixing plate 8, the vertical flow velocity distribution of the burner head 4 becomes uniform. Then, the air-fuel mixture is ignited by the ignition device 21 on the flame holes 5 of the burner head 4 to form the primary flame 23 and the secondary flame 24. After the combustion is started, heat is recovered from the flame by the flame holding ring 9 and the like to heat the carburetor 1, so that the electric heater 2 is de-energized. Then, when the power switch is turned off, the supply of the liquid fuel 16 is stopped and the flame of the burner head 4 is extinguished, after which the drive of the combustion blower 12 is stopped and the operation of the liquid fuel combustion device is stopped.

[0007]

The conventional liquid fuel combustion apparatus as described above is driven to cool the carburetor 1 after the drive of the fuel pump 17 is stopped when the flame of the burner head 4 is extinguished. By the time the combustion blower 12 is stopped, the temperature of the oil supply pipe 14, especially the nozzle portion 14A is high due to radiant heat from the vaporizer 1 and the liquid fuel 16 remaining in the pipe is expanded. The liquid fuel 16 may be jetted or dropped into the vaporization chamber 1a, and the liquid fuel 16 is discharged from the vaporizer 1 to the outside by riding on the wind from the combustion blower 12 for cooling, which is a source of odor. .

Therefore, the plate-shaped oil feed pipe support member 18 for supporting the oil feed pipe 14 outside the vaporizer cover 10 is made of a material having a low thermal conductivity, and heat from the vaporizer cover 10 to the oil feed pipe support member 18 is reduced. Of the heat from the oil feed pipe support member 18 to the oil feed pipe 14 is also deteriorated, the influence of the heat on the oil feed pipe 14 by the carburetor cover 10 and the vaporizer 1 by the oil feed pipe support member 18 are reduced. The effect of heat on the oil supply pipe 14 on the outside of the oil supply pipe 14 is reduced to prevent the liquid fuel 16 remaining in the pipe of the oil supply pipe 14 from being spouted or drooping into the vaporization chamber 1a and to the outside of the carburetor 1. A device that suppresses the emission of odor has already been proposed. However, in this case, the oil feed pipe 14 and the oil feed pipe support member 18
And the positions of the nozzle portion 14A of the oil feed pipe 14 and the tip member 14b within the nozzle 11 may vary. For example, the nozzle portion 14A may be disposed on the inner peripheral surface 11b of the nozzle 11. When approaching,
The temperature of the nozzle portion 14A was remarkably increased, and it was not possible to fundamentally solve the above-mentioned problems associated with this temperature increase.

Further, in the conventional liquid fuel fuel apparatus, since the oil feed pipe 14 and the oil feed pipe support member 18 are constructed separately, there is a problem that a lot of time is required for the attachment work.

The present invention has been made in order to solve the above-mentioned problems, and suppresses the temperature rise of the oil feeding pipe, especially the nozzle portion, at the time of extinguishing the fire to prevent the generation of odor at the time of extinguishing the oil feeding pipe. An object of the present invention is to provide a liquid fuel combustion apparatus capable of suppressing the variation in the position of the tip portion, facilitating the attachment of the oil feed pipe, improving the workability thereof, and reducing the cost.

[0011]

A liquid fuel combustion apparatus according to the present invention includes a vaporizer having a vaporization chamber for vaporizing liquid fuel, a combustion means provided at an upper portion, and a side wall of the vaporizer covered with a cover. has a pump proximally, the nozzle portion to be inserted into the vaporization chamber through the cover to the front end portion is formed, and the oil feed pipe for supplying liquid fuel to the vaporizing chamber, made from a low thermal conductivity material , For fixing the oil pipe to the cover on one side
A substantially L-shaped fixed part having a hole of
Extends almost horizontally from the top edge of the surface to the opposite side of one surface
An oil-feeding pipe support member configured by a supporting portion for crimping and supporting the oil-feeding pipe and supporting and fixing the oil-feeding pipe to the cover.

[0012]

Further, the liquid fuel combustion apparatus according to the present invention is
The hole of the fixed portion of the oil feed pipe support member is formed in a long hole shape.

Further, in the liquid fuel combustion apparatus according to the present invention, temperature detecting means for detecting the temperature of the carburetor is provided near the through hole through which the nozzle portion of the oil feed pipe of the carburetor cover penetrates, and the oil feed pipe is supported. One side is opened below the hole of the fixing portion of the member, and an elongated hole-like opening hole is provided in which the temperature detecting means is inserted and supported.

Further, the liquid fuel combustion apparatus according to the present invention is
The portion of the oil feed pipe that is crimped by the support portion of the oil feed pipe support member is bent, and the support portion of the oil feed pipe support member is formed in a shape corresponding to the bent portion of the oil feed pipe.

In the liquid fuel combustion apparatus according to the present invention, the nozzle portion of the oil feed pipe is installed so as to be inclined downward.

Further, the liquid fuel combustion apparatus according to the present invention is
The outer periphery of the oil feed pipe, excluding the tip portion of the nozzle portion, is covered with a cylindrical heat shield cover made of a material having a low thermal conductivity.

Further, in the liquid fuel combustion apparatus according to the present invention, the positioning bulging portion of the oil feeding pipe is provided on the base side of the nozzle portion of the oil feeding pipe, and the base portion of the heat shield cover is formed into a tapered shape to allow positioning bulging. The heat shield cover is integrally formed with the oil feed pipe by press-fitting the outlet portion into the base portion of the heat shield cover.

Further, the liquid fuel combustion apparatus according to the present invention is
A protrusion for holding the nozzle portion of the oil feed pipe at a predetermined position is provided on the inner peripheral surface of the tip of the heat shield cover.

[0020]

DETAILED DESCRIPTION OF THE INVENTION

Embodiment 1. 1 is an enlarged sectional view of an essential part of Embodiment 1 of the present invention, FIG. 2 is a rear view of FIG. 1, and FIGS. 3 and 4 show an oil feed pipe and an oil feed pipe support member according to Embodiment 1 of the present invention. It is a perspective view. The same parts as those in the conventional example described with reference to FIG. 14 are designated by the same reference numerals, and the description thereof will be omitted.

In the figure, 31 is an oil feeding pipe support member made of a material having a low thermal conductivity, such as stainless steel, and shown in FIG.
Further, as shown in FIG. 4, one surface 32a has a circular hole 32c into which the screw 34 is inserted, and is fixed to the carburetor cover 10 from the outside by a screw 34 so as to be substantially L-shaped.
The character-shaped fixing portion 32 and the other surface 32b of the fixing portion 32
From the upper end portion of the fuel tank 15 to the side opposite to the one surface 32a, and a rectangular hole 33a is provided in the substantially central portion of the oil feeding pipe 14 from the positioning bulging portion 14d to the fuel tank 15 side. Thus, the plate-shaped support portion 33 that supports the oil feed pipe 14 is formed. The support portion 33 of the oil feed pipe support member 31 is integrally formed by crimping with the oil feed pipe 14 to minimize heat conduction from the oil feed pipe support member 31 to the oil feed pipe 14.
In addition, the positioning bulging portion 14d of the oil feed pipe 14 has a surface on the side contacting the carburetor cover 10 and its through hole 10a formed in an arc shape and has a flange portion on the base side, and the arc portion side penetrates. The sealability with respect to the through hole 10a is improved by being press-fitted into the hole 10a. In addition, as shown in FIG. 5, the square hole 33a provided in the support portion 33 of the oil feed pipe support member 31 is formed obliquely, and the caulked portion 14B of the oil feed pipe 14 is bent to allow the oil feed pipe support member 31 to feed the oil feed pipe. The fixing of 14 may be made stronger.

In the first embodiment configured as described above, the power switch (not shown) provided in the apparatus is turned off.
When it is N, the electric heater 2 is energized to heat the side wall of the vaporizer 1, and is preheated until the temperature detector 20 detects a temperature necessary for vaporizing the liquid fuel 16, for example, 200 to 300 ° C. When the preheating is completed, the combustion blower 12 is driven to send the combustion air to the air supply passage 13, and the nozzle 1
1 is supplied to the vaporization chamber 1a. Fuel pump 17 at the same time
Is driven, and the jet port 14c of the tip member 14b of the oil feed pipe 14 is driven.
To the primary air ratio (= supply air amount / theoretical air amount) is 0.8
The liquid fuel 16 in an appropriate amount is supplied to the vaporization chamber 1a.

The supplied liquid fuel 16 is vaporized by the heat of the vaporizer 1 which has been atomized and preheated by the flow of combustion air. The vaporized liquid fuel 16 is mixed with the combustion air when passing through the throttle portion 3 to have a uniform concentration distribution. Then, the mixture of the vaporized fuel and the combustion air is mixed into a plurality of gas on the bottom surface of the mixing plate 8. It is rectified by passing through the holes. At this time, due to the effect of the side wall of the mixing plate 8, the vertical flow velocity distribution of the burner head 4 becomes uniform. Then, the air-fuel mixture is ignited by the ignition device 21 on the flame holes 5 of the burner head 4 to form the primary flame 23 and the secondary flame 24. After the combustion is started, heat is recovered from the flame by the flame holding ring 9 and the like to heat the carburetor 1, so that the electric heater 2 is de-energized. When the power switch is turned off, the drive of the fuel pump 17 is stopped, the supply of the liquid fuel 16 is stopped, the flame of the burner head 4 is extinguished, and then the drive of the combustion blower 12 is stopped to stop the liquid. The operation of the fuel combustion device is stopped.

At the time of extinguishing the flame of the burner head 4,
Although the carburetor 1 is at a high temperature, the heat transfer from the carburetor cover 10 to the oil supply pipe support member 31 is poor due to the oil supply pipe support member 31 made of a material having a low thermal conductivity, and Since the heat transfer to the oil supply pipe 14 becomes poor, the temperature of the oil supply pipe 14 and particularly the nozzle portion 14A does not rise, and the liquid fuel 16 remaining in the pipe is prevented from expanding and squirting or dropping into the vaporization chamber 1a. To be done.

As described above, the support portion 33 of the oil feed pipe support member 31 is integrally formed with the oil feed pipe 14 by crimping, and the fixed portion 32 of the oil feed pipe support member 31 screws the oil feed pipe 14 to the carburetor cover 10. I decided to fix it, so
The oil transfer pipe support member 31 made of a material having a low thermal conductivity makes it difficult for the oil transfer pipe 14 to transmit the heat from the vaporizer 1 which is at a high temperature during digestion, so that the liquid fuel 16 remaining in the pipe expands. First, from the oil pipe 14 to the liquid fuel 1
6 can be suppressed from spouting, and the liquid fuel 16 that is the source of the odor does not exist in the vaporization chamber 1a, so that the generation of the odor can be prevented. Further, the oil feed pipe support member 31
Since it is integrally formed by firmly caulking with the oil feed pipe 14 by the support portion 33, the nozzle portion 14A of the oil feed pipe 14 and the tip member 14b can be inserted coaxially with the nozzle 11 of the carburetor 1 without shaking. Since it is possible to prevent the nozzle portion 14A from approaching the inner peripheral surface 11b of the nozzle 11, the heat transfer from the nozzle 11 to the nozzle portion 14A becomes poor and the temperature rise of the tip member 14b of the oil feeding pipe 14 is suppressed. You can As a result, the nozzle portion 14A
It is possible to suppress the expansion of the liquid fuel 16 remaining in the pipe, and to prevent the liquid fuel 16 from spouting or dropping into the vaporization chamber 1a and preventing the generation of odor. This effect becomes more remarkable in a device in which the combustion blower is also stopped at the time of extinguishing the fire.

Embodiment 2. FIG. 6 is an enlarged cross-sectional view of the essential parts of the second embodiment of the present invention. The second embodiment is different from the first embodiment in that the support portion 32 of the oil feed pipe support member 31.
The nozzle portion 14A of the oil feed pipe 14 which is crimped and integrally formed with the carburetor 1 is installed in the carburetor 1 so as to be offset from the central axis A of the nozzle 11 horizontally arranged with respect to the bottom surface of the carburetor 1 and inclined downward. It is a thing. The nozzle portion 14
It is important to incline A, and the inclination is such that the ejection port 14c of the tip member 14b of the nozzle portion 14A is the nozzle 11
It is preferable that they are located on the central axis A of the device without variation.

Also in the second embodiment having such a configuration, as in the case described in the first embodiment, when the power switch is turned on to preheat and the preheating ends, the liquid fuel 16 passes through the oil feed pipe 14. And is supplied to the vaporization chamber 1a.
During combustion, that is, when the liquid fuel 16 is supplied, the liquid fuel 16 smoothly flows down in the pipe of the nozzle portion 14A by the nozzle portion 14A inclined downward, and is supplied without accumulating in the vicinity of the ejection port 14c. Next, when the power switch is turned off and the supply of the liquid fuel 16 is stopped, the flame of the burner head 4 is extinguished and the operation of the liquid fuel combustion device is stopped. At the time of extinguishing, the liquid fuel 16 is well cut off by the nozzle portion 14A inclined downward, and the liquid fuel 16 does not remain in the pipe of the nozzle portion 14A. Therefore, the liquid fuel 16 is jetted or dripped into the vaporization chamber 1a. It never falls.

In this way, the nozzle portion 14A of the oil feed pipe 14 is
Is installed so as to be inclined downward from the central axis A of the horizontally arranged nozzle 11, so that the liquid fuel 16 does not flow down the nozzle portion 14A smoothly and does not generate an oil reservoir at the ejection port 14c. The oil can be drained well. As a result, the liquid fuel 16 does not remain in the pipe of the nozzle portion 14A at the time of digestion, and the liquid fuel 16 does not spout or drip into the vaporization chamber 1a. Liquid fuel 1
Since 6 is not present, generation of odor can be eliminated. Further, as in the first embodiment, the support portion 33 of the oil feed pipe support member 31 is integrally formed with the oil feed pipe 14 by caulking, so that the ejection port 14c of the tip member 14b of the nozzle portion 14A is formed.
Are uniformly positioned on the central axis A of the nozzle 11,
The temperature rise of the tip member 14b can be suppressed.

Embodiment 3. FIG. 7 is an enlarged cross-sectional view of the essential parts of Embodiment 3 of the present invention. The third embodiment is different from the first embodiment in that a cylindrical heat shield cover 35 is provided on the outer periphery of the nozzle portion 14A except for the vicinity of the ejection port 14c from the positioning bulging portion 14d of the nozzle portion 14A of the oil feed pipe 14. ,
The nozzle portion 14A of the oil feed pipe 14 is installed in the vaporizer 1 together with the heat shield cover 35. This heat shield cover 35
Is made of a material having a low thermal conductivity, such as stainless steel, and has an inner diameter facing the nozzle portion 14A.
5 is formed larger than the outer diameter of the nozzle portion 14A so that a gap G is formed between the inner peripheral surface of the nozzle portion 14A and the outer peripheral surface of the nozzle portion 14A, and faces the positioning bulging portion 14d.
The base portion 35a of No. 5 is formed in a tapered shape so that the inner diameter thereof is equal to or slightly smaller than the outer diameter of the flange portion 14e of the positioning bulging portion 14d.

Also in the third embodiment configured as described above, as in the case described in the first embodiment, when the power switch is turned on to preheat and the preheating is completed, the liquid fuel 16 passes through the oil feeding pipe 14. Is supplied to the vaporization chamber 1a and burned. Next, when the power switch is turned off and the supply of the liquid fuel 16 is stopped, the flame of the burner head 4 is extinguished and the operation of the liquid fuel combustion device is stopped. At the time of extinguishing, the radiant heat and the like from the vaporizer 1 which is at a high temperature is shielded by the heat shield cover 35 provided on the outer circumference of the nozzle portion 14A.

As described above, since the outer periphery of the nozzle portion 14A except the vicinity of the jet port 14c of the oil feed pipe 14 is covered with the heat shield cover 35, the carburetor 1 which has a high temperature at the time of extinguishing a fire.
The radiant heat from the nozzle can be shielded by the heat shield cover 35, the temperature rise of the nozzle portion 14A can be suppressed, and the nozzle portion 14
Expansion of the liquid fuel 16 remaining in the pipe of A can be suppressed,
It is possible to prevent spouting or dripping into the vaporization chamber 1a and prevent odor from being generated. In addition, the circular arc portion 14f of the positioning bulging portion 14d of the oil feed pipe 14 and the flange portion 14
e is press-fitted into the base portion 35a of the heat shield cover 35,
Since the nozzle portion 14A is installed in the carburetor 1 via the heat shield cover 35, direct contact between the arc portion 14f and the flange portion 14e of the positioning bulging portion 14d and the carburetor cover 10 is eliminated, and the carburetor cover 10 is removed. The heat shield effect on 10 can be further enhanced. Further, by pressing the circular arc portion 14f and the flange portion 14e of the positioning bulging portion 14d into the base portion 35a of the heat shield cover 35, the heat shield cover 3 is formed.
5 can be integrally formed with the oil feed pipe 14, and the nozzle portion 14A of the oil feed pipe 14 can be easily attached. As a result, the installation work time can be shortened and the cost can be reduced.

Fourth Embodiment FIG. 8 is an enlarged cross-sectional view of a main part of the fourth embodiment of the present invention. In the fourth embodiment, the nozzle of the oil feed pipe 14 is provided on the inner peripheral surface of the tip end portion 35b of the heat shield cover 35 according to the third embodiment. A protrusion 35c for holding the portion 14a and the tip member 14b at a predetermined position is provided.

With this configuration, the same operation and effect as those of the third embodiment can be obtained, and the heat shield cover 3 can be obtained.
No. 14A of the oil feed pipe 14 and the tip member 1 by the projection 35c provided on the inner peripheral surface of the tip 35b of No. 5 of FIG.
The variation in the position of 4b can be suppressed, the heat shield of the radiant heat from the carburetor 1 at the time of extinguishing can be stabilized by the heat shield cover 35, and the temperature rise of the nozzle portion 14A can be suppressed. Thereby, the nozzle portion 14
It is possible to suppress the expansion of the liquid fuel 16 remaining in the A pipe, prevent the jetting or dropping of the liquid fuel 16 into the vaporization chamber 1a, and prevent the generation of odor during fire extinguishing.

Although the above-described third and fourth embodiments have described the case where these inventions are implemented in the first embodiment, these inventions can also be implemented in the second embodiment. Similar effects are obtained in these cases.

Embodiment 5. 9 is a perspective view of an oil feed pipe and an oil feed pipe support member according to Embodiment 5 of the present invention, and FIG.
FIG. 9 is an enlarged cross-sectional view of the essential parts of Embodiment 5 of the present invention. The fifth embodiment is different from the first embodiment in that the temperature detector 20 is attached near the through hole 10a of the carburetor cover 10 in order to improve the temperature detection accuracy of the carburetor 1. In the fixed portion 32 of the oil feed pipe support member 31 according to, one side is opened below the hole 32c,
The temperature sensor 20 is provided with an elongated hole-shaped opening 36 into which the temperature sensor 20 is inserted and supported.
The diameter is equal to or slightly larger than the outer diameter of the base portion 20a of 0. The support portion 3 of the oil feed pipe support member 31
When the oil feed pipe 14 that is crimped by 3 and integrally formed is screwed and fixed to the carburetor cover 10 by the fixing portion 32 of the oil feed pipe supporting member 31 and the screw 34, the base portion 20a of the temperature detector 20 is opened. To support the temperature detector 20.

With this structure, almost the same action and effect as in the first embodiment can be obtained, and the temperature detector 20 installed in the lower portion of the carburetor cover 10 is provided in the oil feed pipe support member 32 as an opening hole. The oil feed pipe support member 31 by 36
It can be supported with the attachment of the temperature detector 2
0 can be attached to a predetermined position without variation. Thereby, the temperature detection accuracy of the temperature detector 20 can be improved.

Sixth Embodiment FIG. 11 is a perspective view of an oil feed pipe and an oil feed pipe support member according to a sixth embodiment of the present invention. In the sixth embodiment, one surface of a fixing portion 32 of an oil feed pipe support member 31 according to the fifth embodiment is shown. Instead of the circular hole 32c provided in 32a, an oblong hole 32d is provided, and its minor axis is formed slightly larger than the outer diameter of the screw 34.

By virtue of such construction, almost the same operation and effect as in the fifth embodiment can be obtained. Also, FIG.
2 and FIG. 13, when the diameter of the nozzle 11 is different or the hole of the nozzle 11 is formed into an elliptical shape, the through hole 10a of the carburetor cover 10 and the carburetor cover 10 are provided. The distance between the screw 34 and the screw hole 10b for the screw 34 is different, or the caulking condition of the oil pipe support member 31 with respect to the oil pipe 14 causes the hole 32d and the oil pipe 14
Since the distance to the center of the
By forming the oblong hole, the screwing position of the screw 34 with respect to the hole 32d can be adjusted to the left and right, and the oil feeding pipe 14 can be fixed without being affected by the diameter of the nozzle 11, the shape of the hole, or the caulking condition. Since the nozzle 11 can be always located in the center of the nozzle 11, the oil feed pipe support member 31 can be easily attached to the carburetor cover 10. In this way, this oil feed pipe support member 31 can be commonly used in the above cases, and the cost can be reduced.

Although the above-described fifth and sixth embodiments have described the case where these inventions are implemented in the first embodiment, these inventions are also implemented in the second to fourth embodiments. can do. Similar effects are obtained in these cases.

[0040]

The liquid fuel combustion apparatus according to the present invention has a vaporization chamber for vaporizing liquid fuel, is provided with combustion means at the upper portion, and has a vaporizer whose side wall is covered with a cover, and a vaporizer on the base side. comprises a pump, the nozzle portion to be inserted into the vaporization chamber through the cover to the front end portion is formed, and the oil feed pipe for supplying liquid fuel to the vaporizing chamber, made from a low thermal conductivity material, one
There is a hole on one side for fixing the oil pipe to the cover.
From the upper end of the V-shaped fixed part and the other surface of the fixed part
Extend the oil pipe almost horizontally to the opposite side of one side and caulk the oil pipe.
Since it is provided with a support portion that supports and fixes the oil feed pipe to the cover, the heat from the vaporizer, which is at a high temperature during digestion, is applied to the oil feed pipe by the oil feed pipe support member. It becomes difficult to transmit, the liquid fuel remaining in the pipe does not expand and it is possible to prevent the liquid fuel from spouting from the oil transfer pipe, the liquid fuel that is the source of the odor does not exist in the vaporization chamber, and the odor is generated. Can be prevented. In addition, the support section is used to crimp and support the oil supply pipe.
The oil supply pipe can be reliably supported by the
Install the oil pipe and oil pipe support member to the cover
It is easy to install and the stability of the fixing can be improved.
it can.

[0041]

Further, the liquid fuel combustion apparatus according to the present invention is
Since the hole of the fixed part of the oil supply pipe support member is formed in an elongated shape,
For variations that may occur in manufacturing, such as the distance between the attachment position of the oil feed pipe to the cover and the attachment position of the oil feed pipe support member to the cover is different, or the caulking condition of the oil feed pipe support member with respect to the oil feed pipe is different, Since the screwing position can be adjusted to the left and right by the long hole, the oil supply pipe can always be installed at a predetermined position without variation, and the oil supply pipe support member can be easily attached to the cover.
Further, this oil feed pipe support member can be commonly used even for variations that may occur in manufacturing, and the cost can be reduced.

Further, in the liquid fuel combustion apparatus according to the present invention, temperature detecting means for detecting the temperature of the carburetor is provided in the vicinity of the through hole through which the nozzle portion of the oil feed pipe of the carburetor cover penetrates, and the oil feed pipe is supported. Since one side is opened below the hole of the fixing portion of the member and the elongated hole-shaped opening hole in which the temperature detecting means is inserted and supported is provided, the temperature detector can be attached at a predetermined position without variation, The temperature detection accuracy of the temperature detector can be improved.

Further, the liquid fuel combustion apparatus according to the present invention is
Since the bending portion is applied to the portion of the oil feed pipe that is crimped at the support portion of the oil feed pipe support member, the support portion of the oil feed pipe support member is formed in a shape corresponding to the bent portion of the oil feed pipe.
The nozzle part of the oil feed pipe can be inserted and installed in the vaporization chamber without shaking. As a result, it is possible to prevent the nozzle portion from approaching the side wall of the carburetor, and it is possible to prevent the temperature of the nozzle portion from rising due to the heat from the carburetor that is at a high temperature, and it remains in the tube of the nozzle portion. Without expanding the liquid fuel, it is possible to prevent the liquid fuel from being jetted out or drooping into the vaporization chamber, and it is possible to prevent the generation of odor.

In the liquid fuel combustion apparatus according to the present invention, the nozzle portion of the oil feed pipe is installed so as to be inclined downward, so that the liquid fuel can smoothly flow down through the nozzle portion and the oil can be drained well when extinguishing fire. It is possible to prevent the liquid fuel from remaining in the pipe of the nozzle portion at the time of extinguishing, to prevent the liquid fuel from spouting or dropping into the vaporization chamber, and to prevent the generation of odor.

Further, the liquid fuel combustion apparatus according to the present invention is
The outer circumference of the oil supply pipe, excluding the tip of the nozzle, was covered with a cylindrical heat shield made of a material with low thermal conductivity, so the radiant heat from the carburetor, which is at a high temperature during fire extinguishing, is covered. The heat can be shielded by suppressing the temperature rise of the nozzle part, suppressing the expansion of the liquid fuel remaining in the tube of the nozzle part, preventing spouting or dropping into the vaporization chamber, and preventing the generation of odor. .

Further, in the liquid fuel combustion apparatus according to the present invention, a positioning bulging portion of the oil feed pipe is provided on the base side of the nozzle portion of the oil feed pipe, and the base portion of the heat shield cover is formed in a tapered shape to allow positioning and bulging. Since the heat shield cover is integrally formed with the oil supply pipe by press-fitting the outlet part to the base of the heat shield cover, the heat shield cover eliminates direct contact between the positioning bulging part and the cover, and the heat shield against the cover The effect can be further enhanced, and since the nozzle portion of the oil supply pipe can be easily attached, the attaching operation time can be shortened and the cost can be reduced.

Further, the liquid fuel combustion apparatus according to the present invention is
Since the protrusion that holds the nozzle part of the oil supply pipe at a predetermined position is provided on the inner peripheral surface of the tip of the heat shield cover, the nozzle part of the oil supply pipe can be inserted and installed in the vaporization chamber without shaking, and fire extinguishing can be performed. The heat shielding of the radiant heat from the vaporizer at this time can be stabilized by the heat shielding cover, and the temperature rise of the nozzle portion can be suppressed. As a result, the expansion of the liquid fuel remaining in the tube of the nozzle portion can be suppressed, and the ejection or dropping of the liquid fuel into the vaporization chamber can be prevented and the generation of odor during fire extinguishing can be prevented.

[Brief description of drawings]

FIG. 1 is an enlarged cross-sectional view of a main part of a first embodiment of the present invention.

FIG. 2 is a rear view of FIG.

FIG. 3 is a perspective view of an oil feed pipe and an oil feed pipe support member according to the first embodiment of the present invention.

FIG. 4 is a perspective view of an oil feed pipe and an oil feed pipe support member according to the first embodiment of the present invention.

FIG. 5 is a perspective view showing a modified example of the oil feed pipe and the oil feed pipe support member according to the first embodiment of the present invention.

FIG. 6 is an enlarged cross-sectional view of a main part of the second embodiment of the present invention.

FIG. 7 is an enlarged cross-sectional view of the essential parts of Embodiment 3 of the present invention.

FIG. 8 is an enlarged cross-sectional view of the essential parts of Embodiment 4 of the present invention.

FIG. 9 is a perspective view of an oil feed pipe and an oil feed pipe support member according to a fifth embodiment of the present invention.

FIG. 10 is an enlarged cross-sectional view of the essential parts of Embodiment 5 of the present invention.

FIG. 11 is a perspective view of an oil feed pipe and an oil feed pipe support member according to a sixth embodiment of the present invention.

FIG. 12 is an operation explanatory view of a main part of the sixth embodiment of the present invention.

FIG. 13 is an operation explanatory view of the main part of the sixth embodiment of the present invention.

FIG. 14 is a configuration explanatory view showing a cross section of a main part of a conventional liquid fuel fuel apparatus.

[Explanation of symbols]

1 vaporizer, 1a vaporization chamber, 4 burner head, 10
Vaporizer cover, 10a through hole, 14 oil supply pipe, 14A
Nozzle part, 14B caulking part, 14d positioning bulging part, 17 fuel pump, 20 temperature detector, 31 oil feed pipe support member, 32 fixing part, 32a one side, 32b
The other surface, 32d hole, 33 support portion, 35 heat shield cover, 35a base portion, 35b tip portion, 35c protrusion portion, 36 opening hole.

Continuation of the front page (56) Reference JP-A-9-53808 (JP, A) JP-A-9-210317 (JP, A) JP-A-60-147012 (JP, A) JP-A-8-291611 (JP , A) Actual development Sho 58-157301 (JP, U) Actual development Sho 61-88681 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) F23D 11/10 F23D 5/04

Claims (8)

(57) [Claims] 1. A vaporizer having a vaporization chamber for vaporizing liquid fuel, a combustion means provided at an upper portion thereof, a side wall of the vaporizer covered with a cover, a pump at a base side, and a pump at a tip side. A nozzle part that penetrates the cover and is inserted into the vaporization chamber is formed, and an oil feed pipe that supplies the liquid fuel into the vaporization chamber and a material having a low thermal conductivity are provided, and the oil feed pipe is provided on one surface.
Almost L-shaped with holes for fixing tubes to the cover
From the upper end of the fixed part of the fixed part and the other surface of the fixed part.
On the opposite side of the other side and extends almost horizontally,
A liquid fuel combustion apparatus , comprising: an oil feed pipe support member configured to support and fix the oil feed pipe to the cover. Wherein the oil feed tube hole of the fixing portion of the support member, characterized in that formed in the elongated hole shape claim 1 a liquid fuel combustion apparatus according. 3. A temperature detecting means for detecting the temperature of the vaporizer is provided in the vicinity of a through hole through which a nozzle portion of the oil feed pipe penetrates in a cover of the vaporizer, and a hole of a fixing portion of the oil feed pipe support member is provided. 3. The liquid fuel combustion apparatus according to claim 1, wherein one side is opened downward, and an elongated hole-shaped opening hole, into which the temperature detecting means is inserted and supported, is provided. 4. A portion of the oil feed pipe that is crimped by a support portion of the oil feed pipe support member is bent, and the support portion of the oil feed pipe support member is formed in a shape corresponding to the bent portion of the oil feed pipe. 4. The method according to claim 1, wherein
The liquid fuel combustion apparatus according to any one of 1. 5. A liquid fuel combustion apparatus according to any one of claims 1 to 4 the nozzle portion of the oil pipe is inclined downwardly, characterized in that the installed. 6. A periphery except the tip of the nozzle portion of the oil pipe, according to claim 1 to 5, characterized in that covered by a cylindrical heat shielding cover comprising a low thermal conductivity material according to any one Liquid fuel combustion device. 7. The positioning bulging portion of the oil feeding pipe is provided on the base side of the nozzle portion of the oil feeding pipe, the base portion of the heat shield cover is formed in a tapered shape, and the positioning bulging portion is formed on the heat shield cover. 7. The liquid fuel combustion apparatus according to claim 6, wherein the heat shield cover is integrally formed with the oil feed pipe by being press-fitted into a base portion. 8. The liquid fuel combustion apparatus according to claim 6 , wherein a projection for holding the nozzle portion of the oil feed pipe at a predetermined position is provided on the inner peripheral surface of the tip of the heat shield cover. .