JPH0531373Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Purpose of the invention] (Field of industrial application) This invention is an oil fan heater that supplies liquid fuel to a vaporizer equipped with a heating element, and vaporizes and burns the liquid fuel in the vaporizer. The present invention relates to vaporizers for vaporizer combustion appliances such as the following.

(Prior art) Conventionally, this type of vaporization device was
As disclosed in Publication No. 8748, etc., a nozzle equipped with a needle shaft is provided in an aluminum die-cast vaporizer having a heating element and a vaporization filter,
After the vaporizer is preheated with a heating element and reaches a predetermined vaporization temperature, the electromagnetic pump is driven, and the liquid fuel in the fuel storage section is sequentially supplied into the vaporization filter through the fuel supply path, and the supplied liquid is The fuel is vaporized by the heat of the heating element, and the vaporized gas is guided from the nozzle together with combustion air to a burner where it is combusted. In such vaporizers, a sheathed heater having an outer tube made of iron or stainless steel is used as the heating element, and the heating element constituted by the sheathed heater and the vaporization filter are spaced apart to ensure good heat conduction. The vaporizer is formed by die-casting a material such as aluminum, and the liquid fuel supplied into the vaporization filter is vaporized by the heat of the heating element through the mold material.

(Problem to be solved by the invention) In the above-mentioned conventional technology, the heating element and the vaporizing filter are formed by die-casting aluminum materials to form the vaporizer, so special equipment is required for manufacturing and the manufacturing location is limited. In addition to the high cost, the outer tube of the sheathed heater cannot be made of aluminum, which has good heat conduction.

Therefore, the purpose of the present invention is to provide a vaporizer for a vaporizer combustion appliance that is easy to manufacture, has no limitations on the material of the heating element, and has excellent workability and good thermal conductivity. .

[Structure of the invention] (Means for solving the problem) The invention supplies liquid fuel to a vaporizer equipped with a heating element, vaporizes the liquid fuel in the vaporizer, and supplies this vaporized gas to a burner. In a vaporizer for a vaporizing combustion appliance, a groove is formed in the vaporizer, and the heating element press-fitted into the groove is fixed by caulking at the upper end of the groove.

(Function) With the above configuration, it is possible to use a heating element made of a material with good thermal conductivity while ensuring sufficient adhesion between the heating element and the groove, and the heat of this heating element can be used to fuel liquid fuel in the vaporizer. is vaporized.

(Example) Hereinafter, an example of the present invention will be described with reference to the accompanying drawings.

1 to 3 show a first embodiment of the present invention, in which reference numeral 1 denotes an oil pump whose suction side is immersed in liquid fuel in an oil pan (not shown). 2 has one end on the discharge side of the oil pump 1,
This is a fuel supply pipe whose other end is connected to the vaporizer 3, and supplies liquid fuel to the vaporizer 3. The vaporizer 3 is formed of a cylindrical aluminum base, and inside thereof is a vaporization filter 4 made of a breathable metal member such as a wire mesh.
are filled without any gaps. Reference numeral 5 denotes a concave groove formed in the base of the vaporizer 3 along the length direction of the vaporization filter 4;
A sheathed heater 6 having an aluminum outer tube 6A serving as a heating element is press-fitted and fixed therein, and the opening, which is the upper end of the groove 5, is fastened by a caulking part 7.
In this case, the width dimension of the groove 5 is formed smaller than the outer diameter dimension of the sheathed heater 6, and the inner peripheral wall surface of the groove 5 and the sheathed heater 6 are in close contact with each other by press-fitting and fixing the sheathed heater 6 into the groove 5. . A thermistor 8 is provided in the vaporizer 3 and detects the temperature of the vaporizer 3.

A nozzle 9 communicates with the upper end of the vaporizer 3, and is configured to eject the vaporized gas sent from the vaporization filter 4 from the ejection port 10 at its tip. Reference numeral 11 denotes a needle shaft that is provided so as to be able to move forward and backward within the nozzle 9 by energizing and de-energizing the solenoid 12. During combustion, the nozzle 10 is opened and during non-combustion, the nozzle 10 is closed.
is cleaned.

Reference numeral 13 denotes a burner disposed on the front side of the carburetor 3, and its inlet 13A is spaced apart and opposed to the ejection port 10 of the nozzle 9, and combustion air is sucked in by the vaporized gas ejected from the ejection port 10. Both are mixed and burned in the burner 13.

FIG. 4 shows a control circuit, in which a sheathed heater 6 and a triac 15 for changing the energization period of the sheathed heater 6 are connected in series to the AC power source E via a power switch 14. 16 is an electronic circuit for load control, which controls the load by inputting various information from the thermistor 8, etc., and when the vaporizer 3 reaches the temperature at which vaporization is possible, relays 17 and 18 are energized to maintain the normally open state. Close relay contacts 19 and 20,
The ignition transformer 21 and the oil pump 1 connected in parallel with the sheathed heater 6 are energized. Further, the triac 15 is ignited by a gate signal from the electronic circuit 16, and the energization period of the sheathed heater 6 is adjusted.

The operation of the embodiment configured as described above will be explained with reference to FIG. First, when the power switch 14 is turned on to start operation, the sheathed heater 6 is energized and heating of the vaporizer 3 is started. electronic circuit 1
6 detects the temperature of the vaporizer 3 from the thermistor 8;
When it is detected that the vaporizer 3 has reached a predetermined vaporizing temperature of the liquid fuel, the relays 17 and 18 are energized, the relay contacts 19 and 20 are closed, and the ignition transformer 21 and the oil pump 1 are energized. . Then, the liquid fuel is sucked into the oil pump 1 and supplied to the vaporizer 3 via the oil supply pipe 2. The liquid fuel is heated and vaporized in the vaporizer 3, and this vaporized gas is sent to the nozzle 9.
and is ejected from the ejection port 10 of the nozzle 9 to the inlet 13A of the burner 13. At the same time, the momentum of this vaporized gas draws combustion air into the inlet 13A of the burner 13, and the vaporized gas mixed with this combustion air blows out from the burner 13.
This is ignited by the operation of the ignition transformer 21 to start combustion, and then the sheathed heater 6 is controlled on and off based on the temperature detected by the thermistor 8, and the vaporizer 3 is maintained at a constant temperature.

In this way, in the above embodiment, after the sheathed heater 6 is press-fitted into the groove 5 and the two are brought into close contact with each other,
Furthermore, by caulking and fixing the sheathed heater 6 with the caulking part 7, sufficient adhesion between the outer circumferential surface of the sheathed heater 6 and the inner circumferential wall surface of the groove 5 is ensured, and the connection between the sheathed heater 6 and the vaporizer 3 is ensured. This makes it possible to maintain extremely good thermal conductivity. In addition, since the sheathed heater 6 is press-fitted and fixed into the groove 5 formed in the base of the vaporizer 3, special equipment for die-casting manufacturing is not required and manufacturing is possible at low cost. Since the tube 6A can be made of the same material, metals with good thermal conductivity can be appropriately selected as the materials for the vaporizer 3 and the sheathed heater 6. For example, by making both of them from aluminum, the vaporizer 3 with good thermal conductivity can be made. Can be configured. This makes it possible to shorten the preheating time of the carburetor until ignition compared to a conventional carburetor using a sheathed heater with an iron outer tube, and
The energization cycle of the sheathed heater after ignition can be lengthened, and power consumption can be reduced.

Furthermore, simply connect the sheathed heater 6 to the groove 5 of the vaporizer 3.
After press-fitting, tighten the caulking part 7 of the groove 5 to prevent it from coming off.
By simply crimping and fixing the sheathed heater 6, the sheathed heater 6 and the vaporizer 3 can be easily fixed in close contact with each other, resulting in extremely high workability.

6 to 9 show a second embodiment of the present invention, in which numeral 31 is an oil pan with a closed structure, and a cartridge-type oil tank 33 for supplying liquid fuel 32 is in an overturned state on top of it. The liquid level is maintained at a constant level. 34 is an oil feed pump fixed on the oil pan 31, and its suction side is connected to the liquid fuel 3 in the oil pan 31.
Immersed in 2. 35 connects one end to the oil pump 3
4 is a fuel supply pipe whose other end is connected to the vaporizer 36 and supplies the liquid fuel 32 to the vaporizer 36.

The vaporizer 36 is made of an aluminum base 3.
7, this base body 37 has a cylindrical shape with an open end, and a vaporizing filter 38 is inserted into and removable from the opening. The vaporizing filter 38 is formed by filling a vaporizing pipe 39 with an air permeable metal member 40 such as a wire mesh without any gaps. In addition, a gasket 4 is provided at the opening of the base body 37.
A joint 42 is fitted through the joint 4, and the joint 4
A fixing member 43 is located outside of the base body 37 and is screwed into the opening of the base body 37. And this fixing member 4
3 to the opening of the base body 37, the vaporizing filter 38 is fixed in the base body 37, and the oil supply pipe 35 is connected to the joint 42, and the oil supply pipe 35 is connected to the joint 42 by the gasket 41. is connected to the vaporizer 36 in a liquid-tight manner. Further, the carburetor 36 is inclined by an angle θ such that one end side, that is, the side to which the oil supply pipe 35 is connected, is lower than the other end side, that is, the nozzle side to be described later.

Reference numeral 44 denotes a concave groove formed in the base body 37 of the vaporizer 36 along the length direction of the vaporization filter 38, and an aluminum outer tube 45A serving as a heating element is placed inside this groove 44. A sheathed heater 45 is press-fitted and fixed. and,
The width of the groove 44 is smaller than the outer diameter of the sheathed heater 45, and the width of the groove 44 is smaller than the outer diameter of the sheathed heater 45.
4, the inner circumferential wall surface of the groove 44 and the sheathed heater 45 are in close contact with each other. Also, groove 4
4 is L facing upward on the other end side of the carburetor 36.
It has a groove 44A formed in the shape of a letter, and the sheathed heater 45 is fixed in the groove 44A in an L-shaped bent state so as to fit along a nozzle which will be described later. 46 is a thermistor provided in the vaporizer 36 and detects the temperature of the vaporizer 36. A combustion heat recovery member 47 is located at the upper part of the vaporizer 36 and is provided integrally with the base body 37. This combustion heat recovery member 47 is formed of a rod made of copper, brass, etc., and its base end is connected to the base body 37. The burner is fitted into a recess 48 formed in the burner, and its tip extends to the upper part of the burner, which will be described later.

49 is a nozzle, which is disposed in a direction perpendicular to the vaporizer 36 and located between the other end of the vaporization filter 38 of the vaporizer 36 and the sheathed heater 45 fixed to the groove 44A. vaporizer 36
The vaporized gas sent from the vaporization filter 38 is ejected from the ejection port 50 at the tip thereof, and on the opposite side of the ejection port 50 is communicated with a fuel return pipe 51 connected to the oil pan 31. A return port 52 is provided. 53 is solenoid 5
A needle shaft is provided so as to be able to move forward and backward within the nozzle 49 by turning on and off the coil 55 of No. 4,
A needle valve 56 is provided on the spout 50 side, a gas vent valve 57 is provided on the return port 52 side, and a magnetic core 58 is provided on the inside of the coil 55. ing. The solenoid 54 is of a normally closed type, and the coil 5
5 is energized, the magnetic core 58 is attracted to the coil 55, and the needle shaft 53 retreats against the bias of the bullet 59, opening the spout 50 and closing the return port 52. On the other hand, when the coil 55 is de-energized during non-combustion, the needle shaft 53 moves forward under the force of the bullet 59, blocks the ejection port 50, and opens the return port 52, so that the remaining heat after the combustion is released into the vaporizer 36. The vaporized gas is returned to the oil pan 31, and impurities adhering to the spout 50 are removed by opening and closing.

60 is a burner arranged in front of the vaporizer 36, and this inlet port 60A is connected to the ejection port 5 of the nozzle 49.
The combustion air is sucked in by the vaporized gas ejected from the ejection port 50, and the two are mixed and burned in the burner 60.

Then, the same combustion operation as in the first embodiment is performed, and when there is no combustion, the residual heat after extinguishing is used to heat the vaporizer 36.
The vaporized gas inside returns to the oil pan 31,
In this embodiment as well, since the sheathed heater 45 is press-fitted and fixed in the groove 44 formed in the base body 37 of the vaporizer 36, sufficient adhesion between the sheathed heater 45 and the groove 44 is ensured, and the sheathed It is possible to maintain extremely good thermal conductivity from the heater 45 to the vaporizer 36, and in addition, it does not require special equipment for die-casting and can be manufactured at low cost.
Since the outer tube 45A of the vaporizer 36 and the sheathed heater 45 can be formed of the same material, metals with good thermal conductivity can be appropriately selected as the material of the vaporizer 36 and the sheathed heater 45. This makes it possible to shorten the preheating time of the carburetor until ignition compared to a conventional carburetor using a sheathed heater with an iron outer tube, and
The energization cycle of the sheathed heater after ignition can be lengthened.

Furthermore, after press-fitting the sheathed heater 45 into the groove 44, the sheathed heater 45 and the vaporizer 36 can be easily fixed in close contact by simply crimping and fixing the sheathed heater 45. Excellent workability.

Further, by detecting that the vaporizer 36 has reached a predetermined vaporization temperature of the liquid fuel 32, the liquid fuel 32 sucked into the oil feed pump 34 and supplied to the vaporizer 36 is Vaporization pipe 39
However, in the above embodiment, since the sheathed heater 45 is disposed along the bottom of the vaporization pipe 39, the liquid fuel 32 flows along the bottom of the vaporization pipe 39.
The temperature of the bottom side of the vaporizing pipe 39, where gas flows easily, can be raised quickly, and the preheating waiting time can be shortened accordingly. Further, since the vaporizer 36 is inclined so that the fuel supply pipe 35 side is lower than the nozzle 49 side, the liquid fuel 32 supplied to the vaporizer 36 further follows the bottom of the vaporization pipe 39, and the sheathed heater 45 As a result, the temperature of the bottom side of the vaporizing pipe 39 can be raised quickly, thereby achieving good improvement in vaporizing efficiency. Furthermore, the sheathed heater 45 is provided along the nozzle 49 by press-fitting and fixing the sheathed heater 45 into the L-shaped groove 44A on the other end side of the carburetor 36, that is, on the nozzle 49 side. Therefore, the area around the nozzle 49 can be heated by the sheathed heater 45,
This prevents the vaporized gas vaporized in the vaporizer 36 from liquefying when it passes through the nozzle 49, thereby preventing dew condensation of the vaporized gas. Furthermore, since the sheathed heater 45 is disposed over almost the entirety of the carburetor 36 and along the nozzle 49, it is easy to make the temperature distribution of the carburetor 36 uniform, and stable combustion is possible. Further, a combustion heat recovery member 47 is integrally provided in the vaporizer 36.
Since the tip side of the burner 60 extends to the top of the burner 60, the heat of the flame of the burner 60 is transferred to the combustion heat recovery member 47.
As a result, the energization cycle of the sheathed heater 45 after ignition can be lengthened accordingly, and power consumption can be reduced. Also,
The vaporization filter 38 can be easily replaced by removing the fixing member 43.

Note that the present invention is not limited to the above-mentioned embodiments, and various modifications can be made within the scope of the gist of the present invention. For example, the cross-sectional shape of the groove and the heating element or the type of the heating element may be selected as appropriate.

[Effects of the invention] The present invention provides a vaporizer for a vaporizing combustion appliance that supplies liquid fuel to a vaporizer provided with a heating element, vaporizes the liquid fuel in the vaporizer, and supplies the vaporized gas to a burner. A groove is formed in the vaporizer, and the heating element press-fitted into the groove is fixed at the upper end of the groove, and it is easy to manufacture and there are no restrictions on the material of the heating element, improving workability. It becomes possible to provide a vaporization device for a vaporization combustion appliance that can provide excellent thermal conductivity.

[Brief explanation of the drawing]

1 to 5 show a first embodiment of the present invention, FIG. 1 is a sectional view of the vaporizer, FIG. 2 is a partially cutaway perspective view showing the main parts of the vaporizer, and FIG. 2 is an enlarged sectional view taken along the line A-A in FIG. 2, FIG. 4 is a circuit diagram of the control circuit, FIG. 5 is an operation explanatory diagram, FIGS. 6 to 9 show a second embodiment of the present invention, and 7 is a perspective view of the vaporizer, FIG. 8 is a front view of the vaporizer, and FIG. 9 is a sectional view of the vaporizer. 3, 36... vaporizer, 5, 44, 44A...
Groove, 6, 45... Sheathed heater (heating element), 13,
60...Burna.

Claims (1)

[Scope of utility model registration request] In a vaporizing device for a vaporizing combustion appliance, which supplies liquid fuel to a vaporizer provided with a heating element, vaporizes the liquid fuel in the vaporizer, and supplies the vaporized gas to a burner, a groove is formed in the vaporizer, A vaporizer for a vaporizing combustion appliance, characterized in that the heating element press-fitted into the groove is fixed by caulking at the upper end of the groove.