JP2014163521A - Vaporizer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vaporizer having a simple structure and capable of saving labor for welding or the like and allowed to be simply manufactured even in a type of different vaporization capacity.SOLUTION: A vaporizer 1 is configured by integrally molding a heat recovery part 11 and a heater heat receiving part 13 by extrusion and welding with a vaporization container 14. By integrally molding the heat recovery part 11 and the heater heat receiving part 13, the number of components can be reduced, lobar for welding and assembly can be reduced, and further since extrusion is used for molding, components corresponding to a vaporizer with different vaporization capacity can be manufactured only by changing extrusion length, so that reduction of manufacturing costs due to sharing of a metal mold can be achieved.

Description

  The present invention relates to a vaporizer that heats and vaporizes liquid fuel such as kerosene to generate vaporized gas.

  Conventionally, there exists a thing as shown to patent document 1 as this kind of vaporization apparatus. The vaporization apparatus of Patent Document 1 includes a cylindrical vaporization unit that heats and vaporizes liquid fuel, and a nozzle unit that communicates with the vaporization unit and crosses the vaporization unit, and jets the vaporized gas that is heated and vaporized in the vaporization unit from an outlet at the tip. It consists of and.

  The vaporizing section is provided with an inner tube to which the liquid fuel is supplied from the base end portion inside the cylindrical heating element, which is used as a pre-stage vaporizing chamber, and the cylindrical heating element is stored in the storage tube. An outer tube that communicates with the inner tube and the tip through a gap serving as a vaporized gas passage is provided outside the storage tube, and the inner stage of the outer tube, that is, between the outer tube and the storage tube, communicates with the previous vaporization chamber. The rear vaporization chamber is configured such that a communication port communicating with the nozzle portion is provided on the downstream side of the rear vaporization chamber.

JP 2012-078055 A

  As described above, the conventional vaporizer has a complicated structure and a large number of parts, so that it takes time and effort for welding and assembly. In addition, this type of vaporizer requires different types of vaporization capability depending on the amount of combustion of the installed combustion device. In order to manufacture vaporizers with different vaporization capabilities, Since parts with different lengths and sizes and a mold for molding the parts are required, it is difficult to reduce the manufacturing cost.

  An object of the present invention is to provide a vaporizer that has a simple structure, requires less labor such as welding, and can easily manufacture types having different vaporization capabilities.

  The present invention includes a heat recovery unit that recovers combustion heat from a flame, a heater heat receiving unit to which a heater is attached and receives heat from the heater, and a vaporization container that vaporizes liquid fuel to form a vaporized gas. It is a vaporization apparatus provided with the vaporization part which heats and makes vaporized gas, Comprising: The said heat recovery part and the heater heat receiving part were integrally formed by the extrusion process.

  2. The vaporizer according to claim 1, wherein an extruding direction of the heat recovery unit and the heater heat receiving unit is a width direction of the vaporizing unit.

  The vaporization apparatus according to claim 2, wherein the vaporization container has an upper surface opened, and a vaporization unit is configured by joining the opening end surface and the heater heat receiving unit.

  4. The vaporizer according to claim 3, wherein the heater is a flat ceramic heater, and a heater installation surface which is a flat surface on which the heater is installed is formed in the heater heat receiving portion.

  The vaporizer according to claim 4, wherein a heat transfer sheet is interposed between the heater and the heater installation surface.

  In addition, a pair of heater locking portions project from the heater installation surface along the extrusion direction, and the heater is fixed between the heater locking portions and the heater pressing metal fittings that are disposed between the heater locking portions. 6. The vaporizer according to claim 4 or 5, wherein:

  By configuring as described above, it is possible to reduce the number of parts and reduce the labor of welding and the like, and it is possible to easily manufacture parts corresponding to vaporizers with different vaporization capabilities by simply changing the extrusion length. It becomes.

It is an external view of the vaporization apparatus of this invention. It is sectional drawing of the vaporization apparatus of this invention. It is a perspective view of a vaporization head.

  Embodiments of the present invention that are considered to be suitable will be briefly described by showing the effects of the present invention.

  The vaporization apparatus of the present invention can reduce the number of parts and labor of welding and assembly by integrally forming the heat recovery part and the heater heat receiving part by extrusion. Furthermore, since extrusion is used for molding, parts corresponding to vaporizers with different vaporization capacities can be manufactured simply by changing the extrusion length, so that the manufacturing cost can be reduced by sharing the mold. .

  Also, by adjusting the width of the heat recovery section and the heater heat receiving section to the extrusion direction, the amount of heat recovered from the flame and the amount of heat received by the heater can be increased or decreased by changing the extrusion length, making it easy to adjust the vaporization capacity Can be done.

  The vaporization container has a shape that can be molded by press working, and the vaporization section can be easily configured by joining the vaporization container and the heater heat receiving section.

  In addition, since the ceramic heater has a high watt density and a small heat capacity, it has good thermal efficiency. Further, since the contact area with the heater installation surface is increased by using a flat plate shape, the vaporizer can be quickly heated. If the heater installation surface is distorted or has fine irregularities, a gap may be formed between the heater and heating efficiency may be reduced, or the heater may be damaged during installation. Since the molded surface is very smooth, the heater and the heater installation surface can be brought into close contact with each other without finishing.

  In addition, if foreign matter adheres to the heater installation surface in the manufacturing process of the vaporizer, even if the heater installation surface is smooth, there is a gap between the heater and the heater installation surface, which reduces the heating efficiency. A gap can be prevented by interposing a heat transfer sheet.

  In addition, since the heater is fixed by the pair of heater locking portions and the heater pressing metal formed on the heater installation surface, the heater installation surface and the heater can be securely adhered to each other. Furthermore, since this heater latching | locking part is provided along the extrusion direction, it can be formed in the case of an extrusion process, and does not require the effort of a process.

  Hereinafter, a liquid fuel combustion apparatus as an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is an external view of the vaporizer, and FIG. 2 is a cross-sectional view of the vaporizer. The vaporizer 1 includes a vaporization unit 10 that vaporizes liquid fuel to generate vaporized gas, a nozzle unit 20 that ejects the vaporized gas generated by the vaporization unit 10, and a plunger unit 30 that opens and closes the nozzle unit 20. Has been.

  The vaporization unit 10 includes a heat recovery unit 11 that recovers the combustion heat of a flame formed by a burner (not shown), a heater 12 that generates heat when energized, and a heater installation surface 131 that is in close contact with the heater 12. Is provided with a heater heat receiving portion 13 that receives the heat generated by the gas and a vaporization vessel 14 that is supplied with liquid fuel. The heat transfer sheet 15 is sandwiched between the heater 12 and the heater installation surface 131, and the heater 12 is tightly fixed to the heater installation surface 131 by the heater pressing metal 121.

  Since the vaporizer 1 includes the heat recovery unit 11 as described above, the heat recovery unit 11 is heated after the vaporizer 1 is heated by the heat generated by the heater 12 at the start of combustion, and combustion is started and a flame is formed by the burner. The vaporizer 1 is heated by the combustion heat recovered. When the vaporizer 1 is heated, the vaporization container 14 becomes high temperature, and the liquid fuel supplied to the vaporization container 14 is heated to vaporize and become vaporized gas.

  The heat recovery unit 11 and the heater heat receiving unit 13 are integrally formed by extrusion to constitute a vaporizing head 16. FIG. 3 is a diagram showing the vaporizing head 16. In the following description, the horizontal width of the vaporizing head 16 is “width direction X”, the vertical direction is “height direction Y”, and the nozzle unit 20 penetrates the vaporization unit 10. The direction to be performed is described as “depth direction Z”.

  The vaporizing head 16 has the same cross section in the width direction X (YZ cross section) at all points. By adopting such a shape, the vaporizing head 16 is formed by extruding it from the mold with the width direction X of the vaporizing head 16 as the extrusion direction, so that the labor of welding is greatly reduced compared to the conventional structure. Can do. In this embodiment, the vaporizing head 16 has the same YZ cross section at all points, but the cross sectional shape may be made different by performing punching or bending after extrusion. In addition, it is possible to perform a drawing process for improving the dimensional accuracy after the extrusion process.

  This type of vaporizer 1 is required to have a different type of vaporization capability in accordance with the amount of combustion of the mounted combustion device. Since the vaporization capacity is changed by adjusting the volume of the vaporization container 14, the amount of heat received from the heater 12, and the amount of heat recovered, conventionally, in order to manufacture the vaporizer 1 having a different vaporization capacity, the length and size are different. Parts and molds for molding them were required for each type. However, the vaporization apparatus 1 of the present invention can change the vaporization capability by changing the length of the vaporization head 16 in the width direction X with respect to the amount of heat received and the amount of heat recovered by the heater 12. Can be adjusted by the extrusion length of the extrusion process, the vaporization head 16 of the vaporization apparatus 1 having different vaporization capabilities can be manufactured by one extrusion mold. In other words, by integrally forming the vaporizing head 16 by extrusion, not only the welding process can be reduced, but also the mold can be shared, so that the manufacturing capability of the vaporizer can be greatly improved compared to the conventional case. Can do.

  Further, the vaporization container 14 is a substantially box-shaped container having an upper surface opened, and the vaporization section 10 is configured by joining the opening end surface to the bottom of the heater heat receiving section 13 of the vaporization head 16. At this time, since the overhanging portion 161 formed on the bottom surface of the vaporizing head 16 is fitted into the vaporizing container 14, the joining operation can be easily performed without causing positional displacement.

  That is, the vaporization container 14 can also be formed by press work, and it does not take time and effort for welding. Since the vaporization part 10 is comprised by joining the vaporization head 16 and the vaporization container 14, it becomes possible to manufacture in fewer processes compared with the past.

  As the heater 12, a flat plate ceramic heater made of a material such as alumina or silicon nitride is used. Since the ceramic heater has a high watt density and a small heat capacity, it has good thermal efficiency. Since the shape of the ceramic heater is flat, the contact area with the heater installation surface 131 increases, so that the vaporizer 1 can be quickly heated.

  From the heater installation surface 131, a pair of heater locking portions 132 are formed so as to protrude along the extrusion direction (width direction X) of the vaporizing head 16. The heater locking portion 132 includes a protruding portion 133 that rises from the heater installation surface 131 and a flange portion 134 that is provided at the tip of the protruding portion 133, and is formed at the same time as the vaporizing head 16 is extruded. Then, the heater 12 is positioned by fitting the heater 12 between the protrusions 133, and the heater 12 is pressed against the heater installation surface 131 by hooking and fixing the heater pressing metal 121 to the flange portion 134. Fixed.

  By the way, if the heater installation surface 131 is distorted or has fine irregularities, a gap is formed between the heater 12 and the heater installation surface 131, and the heating efficiency is lowered. In particular, the ceramic heater itself is not flexible, so depending on the degree of distortion and unevenness, the heater 12 may be damaged during installation. If there is distortion or unevenness, the surface is smoothed by finishing. It must be done. However, since the surface formed by the extrusion process is very smooth, the heater 12 and the heater installation surface 131 can be brought into close contact with each other without finishing the heater installation surface 131.

  Further, if foreign matter adheres to the heater installation surface 131 in the manufacturing process of the vaporizer 1, even if the heater installation surface 131 is smooth, a gap is formed between the heater 12 and the heater installation surface 131, resulting in a reduction in heating efficiency. . Therefore, the heat transfer sheet 15 is sandwiched between the heater 12 and the heater installation surface 131 to prevent a gap when foreign matter adheres. Although there are various materials for the heat transfer sheet 15, a graphite heat transfer sheet having high thermal conductivity and flexibility is preferable.

  A fuel discharge port 18 connected to the oil feeding pipe 4 is attached to the vaporization container 14, and the oil feeding pipe 4 is connected to the oil receiving tray 2 via the electromagnetic pump 3, and drives the electromagnetic pump 3. Thus, the liquid fuel stored in the oil receiving tray 2 is supplied to the vaporization container 14 through the oil feeding pipe 4. And the through-holes 143 and 144 which the nozzle part 20 penetrates in the front surface and the back surface of the vaporization container 14 are formed.

  The nozzle unit 20 includes a cylindrical nozzle pipe 21 that passes through through holes 143 and 144 provided in the vaporization container 14 and has a rear end connected to the plunger unit 30. A communication port 24 communicating with the inside of the vaporization container 14 is formed in the upper part of the nozzle pipe 21, and a jet port 22 is provided at the tip, and the vaporized gas generated in the vaporization container 14 is communicated from the communication port 24. It flows into the nozzle pipe 21 and is ejected from the ejection port 22 toward the burner.

  The plunger portion 30 includes a cylindrical body 31 in which a cylindrical portion 311 and a small diameter portion 312 are integrally formed by deep drawing, and a solenoid coil 32, and is configured to penetrate the cylindrical body 31 inside the solenoid coil 32. . The cylindrical portion 311 of the cylindrical body 31 has a fixed piece 34 fixed to the rear end, a movable piece 33 slidable inside, and a spring 35 interposed between the fixed piece 34 and the movable piece 33. Is provided. The solenoid coil 32 is energized to generate a magnetic force, and the movable piece 33 is attracted by the magnetic force.

  The fixed piece 34 is formed with a small portion 36 that is a small space, and the negative portion 5 for returning the vaporized gas remaining in the vaporization container 14 and the nozzle pipe 21 to the oil receiving tray 2 is connected to the fixed piece 34.

  In the movable piece 33, a plunger valve 37 for closing the dented portion 36 of the fixed piece 34 is inserted and fixed, and a valve rod 38 is attached toward the nozzle pipe 21 side, and the valve rod 38 is tapered. A valve needle 381 that opens and closes the nozzle 22 of the nozzle pipe 21 is formed at the tip of the nozzle. Further, the movable piece 33 is constantly pressed toward the nozzle pipe 21 by the urging force of the spring 35, so that the valve needle 381 closes the ejection port 22.

  Next, the operation of the vaporizer in the above configuration will be described.

  When the start of combustion is instructed, the heater 12 is energized, and the heat generated by the heater 12 is transferred through the heater heat receiving portion 13 to raise the temperature of the vaporization vessel 14. The temperature of the vaporization vessel 14 is detected by a thermistor (not shown), and when the vaporization vessel 14 rises to a temperature at which the liquid fuel can be vaporized, the electromagnetic pump 3 is started to pump up the liquid fuel in the oil pan 2. The liquid fuel passes through the oil feed pipe 4 and is supplied from the fuel discharge port 18 into the vaporization container 14. The liquid fuel supplied into the vaporization container 14 is heated and vaporized to become vaporized gas.

  The vaporized gas generated in the vaporization container 14 diffuses into the vaporization container 14 and flows into the nozzle pipe 21 from the communication port 24. Since the nozzle pipe 21 is maintained at a high temperature by the heat of the vaporization vessel 14, the temperature of the vaporized gas flowing into the nozzle pipe 21 is not lowered, so that the combustion state can be maintained satisfactorily.

  The solenoid coil 32 is energized immediately before the electromagnetic pump 3 is started, and the movable piece 33 is attracted by the magnetic force of the solenoid coil 32 and slides toward the fixed piece 34 side. As the movable piece 33 slides, the valve rod 38 also moves to the fixed piece 34 side, so that the valve needle 381 provided at the tip of the valve rod 38 is disengaged from the jet port 22, and the plunger valve 37 is further fixed to the fixed piece 34. In order to close the relief portion 36 of 34, the vaporized gas flowing into the nozzle pipe 21 is ejected from the ejection port 22 toward the burner.

  When the flame is formed by the burner, the heat recovery unit 11 is exposed to the flame and recovers the combustion heat. Therefore, the combustion heat recovered from the flame by the heat recovery unit 11 is transferred to the vaporization container 14 via the heater heat receiving unit 13. Heat is transferred and the vaporization container 14 is heated.

  The temperature of the vaporization container 14 is constantly detected by a thermistor, and energization to the heater 12 is controlled so that the temperature of the vaporization container 14 becomes a temperature suitable for vaporization of liquid fuel, and vaporization is performed by the heat recovered by the heat recovery unit 11. If the container 14 is sufficiently heated, the energization to the heater 12 is stopped. Thereby, the power consumption during combustion can be reduced.

  When there is an instruction to stop combustion, the energization to the heater 12 and the electromagnetic pump 3 is stopped, and at the same time, the energization to the solenoid coil 32 is stopped. When the energization of the solenoid coil 32 is stopped, the movable piece 33 is slid and pressed toward the nozzle pipe 21 by the urging force of the spring 35, so that the valve rod 38 also moves toward the ejection port 22 and moves to the tip. Since the valve needle 381 closes the ejection port 22, the vaporized gas remaining in the vaporization container 14 is prevented from leaking from the ejection port 22. At the same time, since the relief portion 36 closed by the plunger valve 37 is opened, the vaporized gas remaining in the vaporization vessel 14 and the nozzle pipe 21 is returned from the relief portion 36 to the oil receiving tray 2 through the relief pipe 5. .

DESCRIPTION OF SYMBOLS 1 Vaporizer 10 Vaporization part 11 Heat recovery part 12 Heater 121 Heater holding metal fitting 13 Heater heat receiving part 131 Heater installation surface 132 Heater latching part 14 Vaporization container 15 Heat transfer sheet

Claims (6)

  A heat recovery part that recovers combustion heat from the flame, a heater heat receiving part that is attached with a heater and receives heat from the heater, and a vaporization container that vaporizes the liquid fuel into vaporized gas, and heats the liquid fuel. A vaporizing apparatus comprising a vaporizing section for forming a vaporized gas, wherein the heat recovery section and the heater heat receiving section are integrally formed by extrusion.   2. The vaporizer according to claim 1, wherein an extruding direction of the heat recovery unit and the heater heat receiving unit is a width direction of the vaporizing unit.   The vaporization apparatus according to claim 2, wherein the vaporization container has an upper surface opened, and the vaporization unit is configured by joining the opening end surface and the heater heat receiving unit.   4. The vaporizer according to claim 3, wherein the heater is a flat ceramic heater, and a heater installation surface which is a flat surface on which the heater is installed is formed in the heater heat receiving portion.   The vaporizer according to claim 4, wherein a heat transfer sheet is interposed between the heater and the heater installation surface.   A pair of heater locking portions project from the heater installation surface along the extrusion direction. The heater is disposed between the heater locking portions and the heater pressing metal is locked to fix the heater. 6. The vaporizer according to claim 4, wherein the vaporizer is provided.

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