JP3339374B2 - Combustion equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combustion apparatus for vaporizing a liquid fuel and ejecting the vaporized gas from a nozzle for combustion.

[0002]

2. Description of the Related Art Conventionally, in this type of combustion apparatus, as shown in FIG. 7, a vaporizing section 38 is formed in a donut shape so that a mixing pipe 39 projects at the center thereof and surrounds the mixing pipe 39. The heater 40 and the temperature detecting means 4
1 is provided. The temperature detecting means 41 was attached to the vaporizing section 38 by screwing or using another fitting. 42 is the tank 4 of the vaporization section 38
The fuel of No. 3 is sucked up and vaporized through the oil feed pipe 44 to the vaporizing section 38.
Pump to supply to. Oil supply pipe 44 of vaporization section 38
On the opposite side, a nozzle portion 45 for ejecting vaporized fuel is provided. A return pipe 46 and an electromagnetic solenoid 47 connected to the tank 43 are connected to the nozzle portion 45, and a needle valve 48 for opening and closing the nozzle 45 is provided on the electromagnetic solenoid 47.

Reference numeral 49 denotes a burner placed above the vaporizing section 38 so as to cover the outlet of the mixing tube 39, and a high-pressure discharge type ignition means for igniting vaporized gas ejected from a flame hole 50 formed on the peripheral wall thereof. 51 are provided.

In the above configuration, the vaporizing section 38 has a heater 4
The oil is heated to a predetermined temperature by 0, and is vaporized in a process of causing the oil entering from the inlet of the oil feed pipe 44 to be ejected by the nozzle 45. When the vaporized gas reaches the nozzle 45 and the electromagnetic solenoid 47 is operated to drive the needle valve 48 to open the nozzle 45, the vaporized gas is ejected from the nozzle 45, and the vaporized gas sucks the surrounding air. The mixture is supplied into the burner 49 through the mixing tube 39 while being mixed, and is ejected from the flame hole 50.

At this time, when the ignition means 51 is operated, a uniform flame is formed in a large number of flame holes 50 to start combustion, and even if the ignition means 51 is stopped, the vaporizing section 3 is still operated by the pump 42.
When the fuel is continuously supplied to the fuel cell 8, the combustion is continued.

[0006] The combustion start operation will be described in detail.
Operates, the needle valve 48 closes the nozzle 45, and the pump 42 is driven in the state as it is, and the heater 40 is energized to heat the vaporizing section 38. That is, the temperature is increased while the vaporizing section 38 is filled with the vaporized gas, and the internal pressure of the vaporizing section 38 is increased. And the vaporization unit 3
When the temperature detecting means 41 detects that the internal pressure of the fuel cell 8 has sufficiently increased and the temperature of the vaporizing section 38 has reached a predetermined temperature, the ignition operation is started, the electromagnetic solenoid 47 operates and the needle valve 4
8 opens the nozzle 45, and the vaporized gas gushes. The vaporized gas is supplied into the burner section 49 through the mixing pipe 39 while sucking and mixing the surrounding air, and is ejected from the flame hole 50 portion. Here, when the ignition means 51 is operated, a uniform flame is formed in the large number of flame holes 50 to start combustion, and even if the ignition means 51 is stopped, the pump 4 remains in this state.
When the fuel is continuously supplied to the vaporizing section 38 in step 2, the combustion is continued. The vaporizing section 38 keeps the temperature of the vaporizing chamber 38 at a high temperature by the heat recovery action by the combustion, thereby suppressing the power supply to the heater 40.

In the combustion apparatus having the above-described structure, the temperature of the vaporizing section 38 detected by the temperature detecting means 41 is apt to vary depending on the mounting configuration, and various measures are taken. For example, as shown in FIG. After the mounting portion hole 52 of the portion 38 is filled with the filler 53 having good thermal conductivity, the outer tube 54 of the temperature detecting device 41 is inserted and the temperature detecting device 41 is held by the holding metal 55, and FIG. A screw tap is cut in the mounting portion hole 56 of the vaporizing portion 38 as shown, and the outer tube 57 of the temperature detecting means 41 is cut with a screw die and screwed, which is complicated and troublesome at the time of maintenance. There was a problem that it easily occurred.

For example, in the former case, the filler 53 must be uniformly filled between the mounting portion hole 52 of the vaporizing portion 38 and the outer tube 54 of the temperature detecting means 41. There is a problem that the temperature detected by the temperature detecting means 38 varies due to heat insulation by the air layer. In particular, at the time of maintenance, since the temperature detecting means 41 is once removed from the vaporization section 38, the previous filler 53 remains at the time of reattachment, and the next filler 53 is less likely to be filled, which tends to cause unevenness.
The temperature to be detected also tends to vary. In addition, it is difficult to store the filler 53, and there is a problem that the temperature is varied by attaching the temperature detecting means 38 while the filler 53 is insufficient or hardened and cannot be sufficiently filled.

In the latter case, when the outer tube 57 of the temperature detecting means 38 is screwed into the mounting portion hole 56 of the vaporizing part 38, the lead wire of the temperature detecting means 38 is twisted and easily cut, so that maintenance is difficult. When the attachment and detachment are repeated at times, there is a problem that the temperature is further twisted, a local resistance change is caused, and the detected temperature is changed or finally cut off.

[0010]

In the above-mentioned conventional combustion apparatus, the vaporizing section needs to be filled with a filler 53 or threaded to improve the heat conduction of the temperature detecting means.
There is a problem that the configuration is complicated, there are many factors of variation, and the cost becomes high.

If the temperature detected by the temperature detecting means 38 fluctuates, it may adversely affect the combustion of the burner 49 or may damage the equipment. For example, the temperature detected by the temperature detecting means 41 fluctuates at the start of combustion. If the temperature is detected to be relatively high, the ignition operation is started before the temperature of the vaporization section 38 reaches the predetermined temperature, and the ignition means 51 is operated in a state where the vaporized gas does not sufficiently accumulate. Odor and white smoke were generated, and in some cases a misfire occurred. Further, when the temperature detected by the temperature detecting means 41 varies at the start of combustion and is detected lower, a control unit (not shown) for controlling the equipment even if the temperature of the vaporizing unit 38 reaches a predetermined temperature, makes the temperature of the vaporizing unit 38 lower. Since it is determined that the temperature has not reached the predetermined temperature and the heater 40 is not turned off, the temperatures of the heater 40 and the vaporizing section 38 are abnormally heated, so that the life of the heater 40 is shortened or the vaporizing section 38 is deformed and used. There was a problem that it became impossible.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems, and to provide a simple structure for attaching a temperature detecting means to a vaporizing section and reducing a variation in the detected temperature. .

[0013]

In order to solve the above-mentioned problems, a combustion apparatus according to the present invention comprises a tank for holding fuel, a pump for sucking and discharging fuel from the tank, and a vaporizer for vaporizing fuel supplied by the pump. Section, a heater for heating the vaporizing section, temperature detecting means for detecting the temperature of the vaporizing section, a burner section for burning the fuel vaporized gas from the vaporizing section, and a pump for controlling the combustion of the burner section. The vaporizing part is made of brass, the mounting hole for the temperature detecting means and the fixing part are provided at key points, and the temperature detecting means is a throttle for inserting a stainless steel mounting part and a thermistor for detecting the temperature. A thermistor is inserted into the narrowed portion of the protective tube, and the fixed portion is formed in the narrowed portion. Is a protective tube Deeper than the diameter of the throttle portion for inserting fixing the thermistor, mounting portions for fixing the protective tube of the temperature detection means is obtained by a structure for closing the holes for mounting the temperature sensing means of the vaporizing unit.

Since the vaporizing portion is made of brass and the protective tube of the temperature detecting means is made of stainless steel, the expansion coefficient is almost the same, and the material is different, so that there is no fear of seizure and the clearance between the mounting hole and the protective tube. Can be reduced, and the thermal conductivity can be improved without using a filler. Further, since the depth of the narrowed portion of the protection tube of the temperature detecting means is made larger than the diameter of the narrowed portion for inserting and fixing the thermistor of the protective tube, the heat receiving area becomes large and the temperature detected by the temperature detecting means is stabilized. Further, since the fixing mounting portion closes the mounting hole of the temperature detecting means of the vaporizing portion, the temperature does not escape, and the detected temperature becomes almost the temperature of the measuring portion and the accuracy is improved.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention can be embodied in the form described in each claim. As described in claim 1, a tank holding fuel, a pump for sucking and discharging fuel from the tank, and a pump are provided. A vaporizing section for vaporizing the supplied fuel, a heater for heating the vaporizing section, temperature detecting means for detecting the temperature of the vaporizing section, a burner section for burning the fuel vaporized gas from the vaporizing section, and a pump are controlled. And a control unit for controlling the combustion of the burner part.The vaporization part is made of brass, and a mounting hole for the temperature detection means and a fixing part thereof are provided at key points, and the temperature detection means is a stainless steel mounting part. A thermistor is formed by inserting and fixing the thermistor into the restrictor in a protective tube formed with a restrictor for inserting a thermistor for detecting the temperature, and the restrictor of the temperature detecting means is inserted into a mounting hole of the vaporizing part. Diaphragm of protection tube The depth of the part is made deeper than the diameter of the throttle part for inserting and fixing the thermistor of the protection tube, and the mounting part for fixing the protection tube of the temperature detecting means closes the hole for mounting the temperature detecting means of the vaporizing part. It can be implemented as a configuration.

Since the vaporizing part is made of brass and the protective tube of the temperature detecting means is made of stainless steel, the two have substantially the same coefficient of thermal expansion, and are made of different materials, so that there is no fear of seizure and the mounting hole and the protective hole are protected. The clearance of the tube can be reduced, and the thermal conductivity can be improved without using a filler. Further, since the depth of the narrowed portion of the protection tube of the temperature detecting means is made larger than the diameter of the narrowed portion for inserting and fixing the thermistor of the protective tube, the heat receiving area becomes large and the temperature detected by the temperature detecting means is stabilized. Furthermore, since the mounting portion closes the mounting hole of the temperature detecting means of the vaporizing portion, the temperature does not escape, and the detected temperature becomes almost the temperature of the measuring portion, and the accuracy is improved.

Further, the structure is simple, the factors of variation are reduced, the man-hour and cost can be reduced, and there is no problem such as twisting of the lead wire at the time of maintenance.

Further, as described in claim 2, the fixing of the vaporizing section and the temperature detecting means is performed by fixing a protective tube of the temperature detecting means with a stainless steel screw in a screw hole provided in the fixing section of the vaporizing section. An embodiment can be provided in addition to the configuration of the combustion device according to the first aspect.

Since the fixing portion of the protective tube is fastened to the vaporizing portion made of brass with a stainless steel screw, the coefficient of thermal expansion is substantially the same, and there is no fear of seizure or loosening of the screw. In addition, since the fixing portion of the protection tube is also made of the same stainless steel as the screw, the noise of the fixing portion due to the fastening of the screw during thermal expansion is reduced.

Further, as described in claim 3, the vaporizing portion and the temperature detecting means are fixed to a catching portion provided on the fixing portion of the vaporizing portion, and to a fixing portion for fixing the protective tube of the temperature detecting means. 2. A structure in which a hook portion is hooked and fastened.
It can be implemented in addition to the described combustion device.

The hook portion provided on the fixing portion can be hooked on the hook portion of the vaporizing portion and fastened simultaneously with the insertion of the protective tube of the temperature detecting means, so that the temperature detecting means can be easily fixed without using fastening means such as screws. Moreover, it can be surely performed, the configuration is simple, the elements of variation are reduced, and the number of steps and cost can be reduced.

[0022]

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

(Embodiment 1) FIG. 1 is a configuration diagram of a hot air heater using a combustion apparatus according to Embodiment 1 of the present invention.

In FIG. 1, reference numeral 1 denotes a main body case, on which a tank 2 for holding liquid fuel is provided on a lower side thereof, and a detachable cartridge tank 3 is provided above the tank 2.
Reference numeral 4 denotes a pump mounted on the upper surface of the tank 2. The pump 4 extends from an upper end of the pump to supply fuel to the combustion device 6.

Reference numeral 7 denotes a combustion tube for guiding the combustion gas from the combustion device 6 upward, and a blower 8 for taking in and sending out the indoor air flow is disposed at the back of the combustion tube. Reference numeral 9 denotes a duct which mixes the combustion gas from the combustion tube 7 with the indoor air flow to generate hot air.

FIG. 2 is a control block diagram of a hot air heater using a combustion device according to the first embodiment of the present invention.

In FIG. 2, reference numeral 10 denotes a control unit for controlling the combustion conditions of the combustion device 6 and the blower 8. The control unit 10 controls the pump 4 and the blower 8 in a predetermined sequence based on the combustion conditions input from the operation unit 11. The combustion device 6 is controlled. Further, the control unit 10 includes the vaporization unit 1 of the combustion device 6.
2 so that the temperature of the evaporator 12 does not drop below the predetermined temperature.
A heater control unit 14 is provided for turning on / off the power supply to the heater 13 by feedback-controlling the temperature of the heater 13.

FIG. 3 is a configuration diagram of the combustion apparatus according to the first embodiment of the present invention. The configuration of the combustion device 6 will be described with reference to FIG. 3. Reference numeral 12 denotes a vaporizer, which is provided with a circular burner receiving seat 15 at an upper portion thereof, and a nozzle 16 is arranged at substantially the center of the burner receiving seat 15. , The burner receiving seat 15
An opening 17 for taking in primary air for supplying combustion air is provided between the nozzle 16 and the nozzle 16, and a cylindrical vaporization chamber 19 is extended in the outer peripheral direction through a communication port 18 communicating with the nozzle 16 to be integrally formed. I have.

The vaporization chamber 19 is provided with a vaporization promoting material 20 for promoting vaporization, and the vaporization chamber 19 on the opposite side of the nozzle 16 is provided with a fuel supply port 21 for supplying fuel. is there. Further, the heater 1 disposed in the vaporizing section 12 along the lower surface of the burner receiving seat 15 opposite to the vaporizing chamber 19.
Temperature detection means 22 is provided at and near 3.

Numeral 23 denotes a bottomless cylindrical mixing tube mounted on the burner receiving seat 15 so as to be located above the nozzle 16, facing the nozzle 16, and a fuel vaporized gas ejected from the nozzle 16. The fuel gas is mixed with the primary air sucked by the ejector effect by the ejection of the fuel gas. Numeral 23 denotes a canned cylindrical burner portion which is overlapped and covered on the burner receiving seat 15 from the upper opening side so as to cover the mixing tube 24, and has a large number of flame holes 23A formed in the lower peripheral wall. 25
Is an upwardly tapered burner ring attached to the burner receiving seat 15 so as to surround the outer peripheral portion of the flame hole 23A, and 26 is a heat receiving portion formed in the burner receiving seat 15.

FIG. 4 is a configuration diagram of a mounting portion of the temperature detecting means 22 used in the combustion apparatus according to the first embodiment of the present invention.

The structure of the mounting part of the temperature detecting means 22 will be described with reference to FIG. 4. The vaporizing part 12 is made of brass, and a mounting hole 27 for the temperature detecting means and its fixing part 28, the temperature detecting means 22
Is formed by inserting and fixing the thermistor 30 to the restricting portion 31 in a protective tube 32 integrally formed with a fixing mounting portion 29 provided on a stainless steel flange portion and a restricting portion 31 for inserting a thermistor 30 for temperature detection. is there. Then, the throttle section 31 of the temperature detecting means 22 is inserted into the mounting hole 27 of the temperature detecting means of the vaporizing section 12, and the fixing section 28 is used to fix the vaporizing section 1.
2 and the protective tube 32 of the temperature detecting means 22.
The depth of the narrowed portion 31 is larger than the diameter of the narrowed portion 31 for inserting and fixing the thermistor 30 of the protective tube 32, and the fixing portion 29 for fixing the protective tube 32 of the temperature detecting means 22 is
The mounting hole 27 of the temperature detecting means of the vaporizing part 12 is closed, and the fixing of the vaporizing part 12 and the temperature detecting means 22 is performed by screwing a stainless steel screw 33 into a screw hole provided in the fixing part 28 of the vaporizing part 12. Thus, the fixing portion 29 for fixing the protection tube 32 of the temperature detecting means 22 is fastened so as to sandwich it.

Next, the operation will be described. The liquid fuel supplied from the cartridge tank 3 to the tank 2 so as to maintain a constant oil level is sucked up from the tank 2 by the pump 4 and is supplied through the oil feed pipe 5 and the oil supply port 21. The gas is sent to the vaporization chamber 19 of the combustion device 6 via the combustion chamber 6. The sent fuel is vaporized in a vaporization chamber 19 maintained at a predetermined temperature or higher by a heater 13 and becomes a high-pressure fuel gas, and is ejected from a nozzle 16. At this time, the vaporization chamber 1 is sucked by an ejector effect while sucking primary air.
9. Mixing in the mixing pipe 24 provided on the downstream side
3 and is ejected from the flame hole 23A and burned.
The generated combustion gas flows above the combustion cylinder 7, is mixed with the indoor air flow from the blower 8 in the duct 9, is discharged as warm air, and is used for heating.

The control unit 10 controls the heater 13, the pump 4, and the blower 8 based on the conditions set by the operation unit 11.
And the like are controlled in a predetermined sequence to control combustion such as starting and stopping combustion and varying the amount of combustion.

Next, the combustion in the burner section 23 will be described. The fuel supplied to the vaporization chamber 19 comes into contact with the wall of the vaporization chamber 19 and the vaporization promoting material 20 maintained at a high temperature, and the vaporization starts gradually. The inlet side of the vaporization chamber 19 is liquid, but the outlet side is gasified and becomes high pressure, and the nozzle 1
It is supplied to 6 and ejected. Next, the fuel vaporized gas ejected from the nozzle 16 flows into a mixing pipe 24 provided on the downstream side of the vaporizing section 12 while sucking primary air by an ejector effect, and is mixed therein. Then, it is discharged into the burner section 23, flows around the outer circumference of the mixing pipe 24, and blows out from a large number of flame holes 23 </ b> A provided in a peripheral wall below the burner section 23, and burns.

At this time, the mixed gas turns back to the burner section 23 and flows around the mixing pipe 24, where it is diffused and mixed, and the pressure is promoted to be uniform, so that the gas is jetted out uniformly from the flame hole 23A to form a uniform flame. To form The flame formation direction is controlled so that the flame is directed upward by the burner ring 25 provided on the outer periphery thereof, and stable combustion without lift is performed. Further, the heat receiving section 26 is heated by the flame formed in the flame hole 23A of the burner section 23, and the vaporizing chamber 1 is heated by the heat recovery action from the flame.
9 can be maintained at a high temperature, for example, 340 ° C. The power supply to the heater 13 is 300
When the temperature is lower than 0 ° C., the power is supplied to the heater 13. When the temperature exceeds 320 ° C., the power supply to the heater 13 is stopped. It becomes possible.

Since the vaporization section 12 is made of brass and the protection tube 32 of the temperature detecting means 22 is made of stainless steel, the thermal expansion coefficients are almost the same, and the materials are different. The clearance between the hole and the protective tube can be reduced, and the thermal conductivity can be improved without using a filler. Also, the throttle 3 of the protection tube 32 of the temperature detecting means 22
Since the depth of 1 is greater than the diameter of the throttle section 31 for inserting and fixing the thermistor 30 of the protection tube 32, the temperature detected by the temperature detecting means 22 is stable. Further, since the mounting portion 29 for fixing the flange portion closes the mounting hole 27 of the temperature detecting means of the vaporizing portion 12, the temperature does not escape, and the detected temperature becomes almost the temperature of the measuring portion and the accuracy is improved.

Since the fixing portion 29 for fixing the protective tube 32 is fastened to the vaporizing portion 12 made of brass with the screw 33 made of stainless steel, the coefficient of thermal expansion of the brass and stainless steel are almost the same, and there is a fear of seizure. There is no need to worry about loosening of the screw 33. Also, since the fixing attachment portion 29 of the protection tube 32 is made of the same stainless steel as the screw 33, the noise caused by the fastening of the fixing attachment portion 29 due to the fastening of the screw 33 during thermal expansion is also reduced.

Further, the configuration is simple, the factors of variation are reduced, the number of steps can be reduced, and the cost can be reduced. Also, there is no problem such as twisting of the lead wire at the time of maintenance.

(Embodiment 2) FIG. 5 is a configuration diagram of a mounting portion of a temperature detecting means 22 used in a combustion apparatus according to Embodiment 2 of the present invention.

The difference from the first embodiment is that the vaporizing section 1 made of brass is used.
2, the fixing portion 29 for fixing the protective tube 32 is fastened with a stainless steel screw 33, and the catching portion 34 provided on the fixing portion 28 of the vaporizing portion 12 is attached to the temperature detecting means 22.
The configuration is such that the hooking portion 35 provided on the fixing mounting portion 29 of the protection tube 32 is hooked and fastened.

The parts having the same reference numerals as in the first embodiment have the same structure, and a description thereof will be omitted. In FIG. 5, the vaporization unit 12 and the temperature detection unit 22 are fixed to a U-shaped catching unit 34 provided on the fixing unit 28 of the vaporization unit 12 and to a fixing attachment unit 29 of the protection tube 32 of the temperature detection unit 22. The hook 35 is hooked and fastened.

At the same time when the protection tube 32 of the temperature detecting means 22 is inserted, the hooking part 35 provided on the fixing mounting part 29 can be hooked on the hooking part 34 of the vaporizing part 12 and fastened. It is simple and reliable, the configuration is simple, the factors of variation are reduced, and man-hour and cost can be reduced.

(Embodiment 3) FIG. 6 is a configuration diagram of a mounting portion of a temperature detecting means 22 used in a combustion apparatus according to Embodiment 3 of the present invention.

The difference from the first embodiment is that the vaporizing portion 1 made of brass is used.
The structure in which the fixing portion 29 for fixing the protection tube 32 is detachably fastened with a stainless steel screw 33 to the vaporizer 1
The configuration is such that the hooking portion 37 provided on the fixing mounting portion 29 of the protection tube 32 of the temperature detecting means 22 is press-fitted into the hooking portion 36 provided on the second fixing portion 28 to perform fastening.

In FIG. 6, the vaporizing section 12 and the temperature detecting means 22 are fixed to a flat catching portion 36 provided in the fixing section 28 of the vaporizing section 12 for fixing the protective tube 32 of the temperature detecting means 22 in the form of a flat plate. Of the fixing portion 28 of the vaporizing portion 12 is pressed against the side wall of the catching portion 36 of the concave portion of the fixing portion 28 of the vaporizing portion 12 and is fastened in a bow shape.

At the same time when the protection tube 32 of the temperature detecting means 22 is inserted, the hook portion 37 provided on the fixing attachment portion 29 can be hooked on the hook portion 36 of the vaporizing portion 12 and fastened. Mounting part 29 for fixing
The throttle 31 of the temperature detecting means 22 is
Of the temperature detecting means 22 can be easily and reliably fixed, and the configuration is also simple. In addition, the factors of the variation are reduced, and the man-hour and cost can be reduced.

In the above embodiment, the temperature detecting means 22
And the fastening means of the temperature detecting means 22 have been described at the same time. However, the structure may be individual, and any other structure may be used as long as the object of the present invention is achieved. It may be something.

[0049]

As described above, according to the combustion apparatus of the present invention, since the vaporizing portion is made of brass and the protection tube of the temperature detecting means is made of stainless steel, the heat of brass and stainless steel can be improved. Since the expansion coefficients are almost the same and the materials are different, the clearance between the mounting hole and the protective tube can be reduced without fear of seizure, and the thermal conductivity can be improved without using a filler. Further, since the depth of the narrowed portion of the protection tube of the temperature detecting means is made larger than the diameter of the narrowed portion for inserting and fixing the thermistor of the protective tube, the heat receiving area becomes large and the temperature detected by the temperature detecting means is stabilized. Further, since the fixing mounting portion closes the hole for mounting the temperature detecting means of the vaporizing portion, the temperature does not escape, and the detected temperature becomes almost the temperature of the measuring portion, and the accuracy is improved. In addition, the configuration is simple, the factors of variation are reduced, the man-hour and cost can be reduced, and problems such as twisting of the lead wires during maintenance are eliminated.

According to the second aspect of the present invention, since the fixing portion of the protective tube is fastened to the evaporating portion with a stainless steel screw made of brass, the brass and stainless steel have substantially the same coefficient of thermal expansion. No worries, no worries about loose screws. In addition, since the fixing portion of the protection tube is also made of the same stainless steel as the screw, the noise of the fixing portion due to the fastening of the screw during thermal expansion is reduced.

According to the third aspect of the present invention, the fixing of the vaporizing portion and the temperature detecting means is performed by a hook provided on the fixing portion of the vaporizing portion and a hook provided on the fixing portion of the protective tube of the temperature detecting means. Is hooked and fastened, so that the hook provided on the fixing part can be hooked on the hook of the vaporizer at the same time as the insertion of the protective tube of the temperature detecting means, and the temperature detecting means can be easily fixed. And you can do it reliably,
The configuration is simple, the elements of variation are reduced, and the number of steps and cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a hot air heater using a combustion device according to a first embodiment of the present invention.

FIG. 2 is a block diagram of a control unit of the hot air heater.

FIG. 3 is a configuration diagram of the combustion device.

FIG. 4 is a configuration diagram of a mounting portion of a temperature detecting means used in the combustion device.

FIG. 5 is a configuration diagram of a mounting portion of a temperature detecting unit according to a second embodiment.

FIG. 6 is a configuration diagram of a mounting portion of a temperature detecting unit according to a third embodiment.

FIG. 7 is a configuration diagram of a conventional combustion device.

FIG. 8 is a configuration diagram of a mounting portion of a temperature detection unit of a conventional combustion device.

FIG. 9 is a configuration diagram of a mounting portion of a temperature detection unit of a conventional combustion device.

[Explanation of symbols]

 2 tank 4 pump 10 control unit 12 vaporization unit 22 temperature detection means 23 burner unit 27 mounting hole 28 fixing unit 29 mounting unit 30 thermistor 31 throttle unit 32 protective tube 33 screw 34, 36 hook unit 35, 37 hook unit

────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Shigeru Murakami 1006 Kadoma, Kazuma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (58) Field surveyed (Int. Cl. ⁷ , DB name) F23D 11/02 F23D 11/40-11/44 F23N 5/14

Claims (3)

(57) [Claims] 1. A tank for holding fuel, a pump for sucking and discharging fuel from the tank, a vaporizer for vaporizing fuel supplied by the pump, a heater for heating the vaporizer, and a heater for the vaporizer. Temperature detecting means for detecting a temperature, and a bar for burning fuel vaporized gas from the vaporizing section.
And a control unit for controlling the pump to control the combustion of the burner unit, the vaporizing unit is made of brass, and a mounting hole for a temperature detection unit and a fixing unit therefor are provided at key points. The temperature detecting means is formed by inserting and fixing the thermistor to the restricting part in a protective tube having a stainless steel mounting part and a restricting part for inserting a thermistor for detecting temperature, and attaching the restricting part of the temperature detecting means to the vaporizing part. The depth of the narrowed portion of the protective tube of the temperature detecting means is made deeper than the diameter of the narrowed portion for inserting and fixing the thermistor of the protective tube, and the mounting portion for fixing the protective tube of the temperature detecting means is: A combustion device in which a hole for attaching a temperature detecting means of a vaporizing section is closed. 2. The fixing of the vaporizing portion and the temperature detecting means, wherein the fixing portion of the protecting tube of the temperature detecting means is fastened by a stainless steel screw into a screw hole provided in the fixing portion of the vaporizing portion. Item 2. The combustion device according to Item 1. 3. The fixing of the vaporizing part and the temperature detecting means is performed by hooking a hooking part provided on a fixing part of the protective tube of the temperature detecting means on a catching part provided on a fixing part of the vaporizing part. 2. The combustion device according to 1.