JP5701834B2 - Vaporizer - Google Patents

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 heater receiving portion of the heater is attached to receive heat from the heater, and a vaporizing surface for the heated vaporized gas by vaporizing the liquid fuel by the heater, and carburetor body integrally molded by extrusion A vaporizing gas jetting nozzle, and a vaporizing chamber side wall attached to the vaporizer body, the vaporizing chamber containing the vaporizing gas is constituted by the vaporizing surface and the vaporizing chamber side wall, the nozzle unit being the vaporizing chamber It is a vaporization apparatus characterized by being provided through .

And a heat recovery part for recovering combustion heat from the flame, wherein the heat recovery part, the heater heat receiving part, and the vaporization surface are integrally formed by extrusion to form the vaporizer body. Item 2. The vaporizer according to Item 1 .

  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 vaporizing apparatuses having different vaporization capabilities by simply changing the extrusion length.

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 vaporizer main body.

  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 includes a vaporizer main body in which a heater heat receiving portion and a vaporization surface are integrally formed by extrusion, thereby reducing the number of parts and reducing the labor of welding and assembly. 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. . In addition, by forming a vaporizer by penetrating a nozzle part, which is a separate component from the vaporizer body, into the vaporization chamber, the shape of the vaporizer body is simplified, so that molding by extrusion can be easily performed. .

  In addition, the vaporizer provided with the heat recovery part for recovering the combustion heat of the burner has the same effect.

  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 chamber 14 that vaporizes the 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 inside of the vaporization chamber 14 becomes high temperature, and the liquid fuel supplied to the vaporization chamber 14 is vaporized to become vaporized gas.

  The vaporizing chamber 14 has a shape in which a space is formed inside by being surrounded by metal members on the four sides. The bottom surface and the front surface of the vaporizing chamber 14 are vaporized surfaces 141 for vaporizing the liquid fuel. Streaky irregularities for promoting vaporization are formed. The vaporizing surface 141, the heat recovery unit 11, and the heater heat receiving unit 13 are integrally formed by extrusion to constitute a vaporizer body 16. FIG. 3 is a diagram showing the vaporizer body 16. In the following description, the lateral width of the vaporizer body 16 is “width direction X”, the vertical direction is “height direction Y”, and the nozzle portion 20 is the vaporizer 10. The direction penetrating through is described as “depth direction Z”.

  The vaporizer main body 16 has the heater heat receiving portion 13 and the heat recovery portion 11 arranged in the height direction Y with respect to the vaporization surface 141, and the cross section in the width direction X (YZ cross section) is the same in all points. It has a shape. By adopting such a shape, the vaporizer body 16 is formed by extruding it from the mold with the width direction X of the vaporizer body 16 as the extrusion direction, so the labor of welding is greatly reduced compared to the conventional structure. can do. Then, the streaky unevenness of the vaporized surface 141 can be formed at the same time when it is extruded. In the present embodiment, the vaporizer body 16 has the same YZ cross section at all points, but the cross section may be different by performing punching or bending after extrusion.

  Further, the arrangement of the vaporization surface 141, the heater heat receiving portion 13 and the heat recovery portion 11 is not limited to the embodiment, and if the cross section in the width direction X is the same shape during extrusion, the vaporizer body 16 is formed by extrusion. Therefore, for example, the heater heat receiving portion 13 may be arranged in the depth direction Z with respect to the vaporization surface 14.

  In addition, this type of vaporizer 1 is required to have a different vaporization capability depending on the amount of combustion of the mounted combustion device. Since the vaporization ability is changed by adjusting the area of the vaporization surface 141, the amount of heat received from the heater 12, and the amount of heat recovered, conventionally, the length and size are different in order to manufacture the vaporizer 1 having different vaporization ability. Parts and molds for molding them were required for each type. However, the vaporizer 1 of the present invention changes the vaporization ability by increasing or decreasing the area of the vaporization surface 141, the amount of heat received by the heater 12, and the amount of heat recovery by changing the length of the vaporizer body 16 in the width direction X. Furthermore, since it can be adjusted by the extrusion length of the extrusion process, the vaporizer body 16 having different vaporization ability can be manufactured with one extrusion mold. In other words, by integrally forming the vaporizer body 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. be able to.

  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.

  A pair of heater locking portions 132 project from the heater installation surface 131 along the width direction X of the vaporizer body 16. The heater locking portion 132 includes a protruding portion 133 that rises from the heater installation surface 131 and a flange portion 134 provided at the tip of the protruding portion 133, and is formed at the same time as the vaporizer body 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.

  Surfaces (both sides and rear surface) other than the vaporization surface 141 of the vaporization chamber 14 are configured by a vaporization chamber side wall 142 which is a U-shaped member, and the vaporization chamber side wall 142 detects the temperature of the vaporization chamber 14. A thermistor (not shown) is attached. And the vaporization part 10 is formed by combining the vaporizer body 16 and the vaporization chamber side wall 142.

  Further, the vaporization chamber 14 is provided with a fuel discharge port 18 connected to the oil feed pipe 4, and this oil feed pipe 4 is connected to the oil receiving tray 2 via the electromagnetic pump 3, and drives the electromagnetic pump 3. As a result, the liquid fuel stored in the oil receiving tray 2 is supplied to the vaporizing chamber 14 through the oil feeding pipe 4. Through holes 143 and 144 through which the nozzle portion 20 passes are formed on the front and back surfaces of the vaporizing chamber 14.

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

  Thus, since the shape of the vaporizer main body 16 is simplified by providing the nozzle part 20 as a separate component from the vaporizer main body 16, it is possible to easily perform molding by extrusion.

  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 is connected to the negative portion 5 through which the vaporized gas remaining in the vaporizing chamber 14 and the nozzle pipe 21 is returned to the oil pan 2.

  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 vaporizing chamber 14. The temperature of the vaporizing chamber 14 is detected by a thermistor. When the vaporizing chamber 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 and the liquid fuel is sent. The oil passes through the oil pipe 4 and is supplied from the fuel discharge port 18 into the vaporization chamber 14.

  The liquid fuel supplied to the vaporization chamber 14 is vaporized by coming into contact with the vaporization surface 141 to become vaporized gas. When the temperature of the vaporization surface 141 is higher than the boiling point of the liquid fuel, the supplied liquid fuel rolls in a spherical shape due to the Leidenfrost phenomenon, and the evaporation speed becomes slow. However, the vaporization surface 141 is provided with streaky irregularities. As a result, spheroidization and rolling are alleviated, and the liquid fuel can be efficiently vaporized to generate vaporized gas.

  The vaporized gas generated on the vaporization surface 141 diffuses into the vaporization chamber 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 vaporizing chamber 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 chamber 14 via the heater heat receiving unit 13. Heat is transferred and the vaporizing chamber 14 is heated.

  The thermistor constantly detects the temperature of the vaporization chamber 14, the energization of the heater 12 is controlled so that the temperature of the vaporization chamber 14 becomes a temperature suitable for vaporization of the liquid fuel, and vaporization is performed by the heat recovered by the heat recovery unit 11. If the chamber 14 is sufficiently heated, the energization of 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 chamber 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 vaporizing chamber 14 and the nozzle pipe 21 is returned from the relief portion 36 to the oil tray 2 through the relief pipe 5. .

  The present invention is not limited to the embodiment described above, and various modifications can be made within the scope of the claims. For example, in this embodiment, the vaporizer provided with the heat recovery unit 11 is described as an example, but a structure without the heat recovery unit 11 may be used.

DESCRIPTION OF SYMBOLS 1 Vaporizer 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 chamber 141 Vaporization surface 142 Vaporization chamber side wall 15 Heat transfer sheet 16 Vaporizer body 20 Nozzle part

Claims (2)

A heater receiving portion that is attached with a heater and receives heat from the heater, a vaporization surface that is heated by the heater and vaporizes liquid fuel to be vaporized gas, and is integrally formed by extrusion, and a vaporized gas A nozzle part for ejection and a vaporization chamber side wall attached to the vaporizer main body are provided, and a vaporization chamber for containing a vaporized gas is constituted by the vaporization surface and the vaporization chamber side wall, and the nozzle part penetrates the vaporization chamber. A vaporizer characterized by being provided . 2. A heat recovery part for recovering combustion heat from a flame, wherein the heat recovery part, the heater heat receiving part, and the vaporization surface are integrally formed by extrusion to form the vaporizer body. The vaporizer described.

Images