JP6211504B2 - 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 vaporization chamber that heats and vaporizes liquid fuel, and a nozzle that ejects the vaporized gas vaporized in the vaporization chamber toward the combustion unit, and is disposed through the nozzle in the vaporization chamber. In addition, the nozzle is provided with a communication port communicating with the vaporizing chamber.

  In addition, a liquid fuel supply port is provided in the vaporization chamber, and the liquid fuel supplied from the supply port to the vaporization chamber sequentially vaporizes and comes into vaporized gas by contacting the high-temperature vaporization chamber wall. Erupts. Thus, in the process of vaporizing the liquid fuel, the unvaporized liquid fuel and the vaporized gas are mixed in the vaporization chamber, and the vaporized gas stays in the upper portion of the vaporization chamber because of its low specific gravity. Therefore, by arranging the communication port between the vaporizing chamber and the nozzle so as to open at the upper portion of the vaporizing chamber, only the vaporized gas staying in the upper portion of the vaporizing chamber is allowed to flow into the nozzle.

JP 2014-74551 A

  Liquid fuels such as kerosene are poorly stored and are exposed to air for a long time or are affected by ultraviolet rays, so that they oxidize to become so-called altered kerosene and increase the high boiling point components. This high boiling point component cannot be completely vaporized in the vaporizing chamber and is accumulated as tar in the vaporizing chamber, or a part of the high boiling point component is mixed in the vaporized gas and flows into the nozzle. The vaporized gas is kept at a high temperature in the nozzle, but when it is ejected from the nozzle, it diffuses into the cold atmosphere at a stretch, so the temperature drops. Then, the high boiling point component mixed in the vaporized gas is solidified when ejected from the nozzle and adheres as a tar around the nozzle, causing nozzle clogging.

  An object of the present invention is to solve the above-described problems, and an object of the present invention is to provide a vaporizer that prevents a high boiling point component contained in a liquid fuel from flowing into a nozzle and does not clog the nozzle due to tar.

The present invention includes a vaporization container that heats liquid fuel to be vaporized gas, and a nozzle portion that ejects the vaporized gas, and the nozzle portion is disposed through the vaporized container and vaporized gas flows into the vaporized gas. A vaporization apparatus having an inflow port, comprising: a vaporization filter made of a porous member in the vaporization container; and a holding member for holding the vaporization filter in a predetermined position, and a space portion around the holding member It is provided, and said vaporized gas inlet is provided at a position opposed to the inner wall of the holding member, the vaporized gas and a TURMERIC suited to the vaporized gas inlet from the space through the vaporizing filter It is the vaporizing device characterized.

  The holding member has a bottomed shape with an opening surface, and the nozzle portion is disposed through the holding member so that the vaporized gas inlet faces the bottom surface of the holding member. Item 2. The vaporizer according to Item 1.

  The vaporizer according to claim 2, wherein the holding member is disposed with an opening surface facing upward.

  Further, the first vaporization filter disposed at the bottom of the vaporization container and the second vaporization filter held by the holding member, the second vaporization filter above the first vaporization filter so as to form a space in the vaporization container. Is a vaporizer according to any one of claims 1 to 3.

  By configuring as described above, since the high boiling point component contained in the liquid fuel is prevented from flowing into the nozzle, nozzle clogging due to tar can be prevented and the life of the vaporizer can be extended.

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 front sectional drawing of the vaporization container in Example 1 of this invention. It is front sectional drawing of the vaporization container in Example 2 of this invention. It is front sectional drawing of the vaporization container in Example 3 of this invention. It is front sectional drawing of the vaporization container in Example 4 of this invention.

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

  The present invention is a vaporization apparatus comprising a vaporization container for vaporizing liquid fuel, and a nozzle portion provided through the vaporization container and provided with a vaporization gas inlet through which vaporized gas flows. The generated vaporized gas flows through the vaporized gas flow path from the space portion through the vaporization filter toward the vaporized gas inflow port.

  Since the high boiling point component contained in the vaporized gas is removed by the space and the vaporization filter while passing through the vaporized gas flow path, the high boiling point component is prevented from flowing into the nozzle, and nozzle clogging due to tar is prevented. Can be suppressed. Since a large amount of tar can be accumulated in the space upstream of the vaporization filter, the amount of tar collected by the vaporization filter is reduced and clogging of the vaporization filter is reduced. It is possible to extend the service life. Furthermore, since the vaporization filter is held using the member that forms the vaporization gas flow path, both the formation of the vaporization gas flow path and the vaporization filter holding can be realized with a single component. The apparatus can be configured easily.

  Further, since the vaporization filter is accommodated in the case-shaped holding member, the vaporization apparatus can be easily assembled, and the vaporization gas can be supplied to the entire vaporization filter by providing the vaporization gas inlet facing the bottom surface of the holding member. Since it passes, tar can be collected by the whole vaporization filter, and tar collection efficiency can be raised.

  Further, since the vaporized gas has a low specific gravity and stays above the vaporization vessel, the vaporized gas vaporized at the bottom of the vaporization vessel can be evenly spaced toward the opening surface by turning the opening of the holding member upward. Will pass. Thereby, since tar accumulates in the whole space part, the volume of a space part can be used effectively.

  In addition, a first vaporization filter is disposed at the bottom of the vaporization container, and a space is provided above the first vaporization filter and the second vaporization filter is disposed, so that the liquid fuel contacts the first vaporization filter and has a surface area. Therefore, the liquid fuel can be efficiently vaporized to generate vaporized gas. Furthermore, since the high boiling point component contained in the vaporized gas accumulates as tar in the space, the amount of tar collected by the second vaporized filter can be reduced, and clogging of the second vaporized filter can be reduced.

  A vaporization apparatus as an embodiment of the present invention will be described below 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.

  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 form a vaporization head 16. The vaporization head 16 is pushed out from the mold with the width direction of the vaporization head 16 as the extrusion direction. Molded. With this configuration, it is possible to change the vaporization capability by reducing the welding effort and changing the extrusion length, and thus the vaporization head 16 of the vaporization apparatus 1 having different vaporization capability with one extrusion mold. Can be manufactured.

  The heater 12 is a flat ceramic heater made of a material such as alumina or silicon nitride, and is closely fixed to the heater installation surface 131 by a heater pressing metal 121. 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.

  The vaporization container 14 is a substantially box-shaped container having an open upper surface, and the vaporization section 10 is configured by joining the opening end face 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.

  Further, an oil feeding pipe 4 is connected to the vaporization container 14, and this oil feeding pipe 4 is connected to the oil receiving tray 2 through an electromagnetic pump 3. By driving the electromagnetic pump 3, the oil feeding pipe 4 passes through the oil feeding pipe 4. Liquid fuel stored in the oil tray 2 is supplied to the vaporization container 14. And the through-holes 141 and 142 which the nozzle part 20 penetrates in the front surface and the back surface of the vaporization container 14 are formed.

  The nozzle part 20 is composed of a cylindrical nozzle pipe 21 having a rear end connected to the plunger part 30 and a jet port 22 formed at the front end, and penetrates through holes 141 and 142 provided in the vaporization container 14. Are arranged.

  FIG. 3 is a front cross-sectional view of the vaporization container 14. In the vaporization container 14, a vaporization filter 143 made of a porous member and a filter case 144 that is a holding member for accommodating the vaporization filter 143 are provided. The nozzle pipe 21 is disposed through the filter case 144. Further, a thermistor 17 that detects the temperature of the vaporization container 14 and a fuel discharge port 18 that is connected to the oil feeding pipe 4 and supplies fuel into the vaporization container 14 are attached to the wall surface of the vaporization container 14.

  The vaporization filter 143 has a role as a collection filter that collects high-boiling components contained in the vaporized gas. The filter case 144 is a cylindrical container whose both ends are open, accommodates the vaporization filter 143 therein, and holds the vaporization filter 143 at a predetermined position in the vaporization container 14.

  A space 146 is formed around the filter case 144, and high-boiling components contained in the liquid fuel that cannot be vaporized are deposited as tar in the space 146. The liquid fuel contains at least a high boiling point component. When the vaporization filter 143 is clogged by the high boiling point component, the amount of vaporized gas ejected from the nozzle unit 20 is reduced, and the vaporization filter is completely removed. If clogged, combustion cannot be continued, but the amount of tar collected by the vaporization filter 143 is reduced by depositing tar in the space 146, so that the clogging of the vaporization filter 143 is reduced. The

  The nozzle pipe 21 penetrating the filter case 144 has a vaporized gas inlet 23 formed at a position facing the inner wall of the filter case 144, and the vaporized gas enters the nozzle pipe 21 from the vaporized gas inlet 23. It flows in and is ejected from the ejection port 22 toward a burner (not shown). In addition, although the vaporization gas inflow port 23 is provided downward in the figure, you may provide upward.

  That is, before the liquid fuel supplied to the vaporization container 14 becomes vaporized gas and is ejected from the ejection port 22, the liquid fuel first contacts the inner surface of the vaporization container 14 and then vaporizes, and then passes through the space 146 to form a cylindrical shape. It flows into the filter case 144 from both end faces of the filter case 144 and passes through a flow path in which high boiling point components are removed while passing through the vaporization filter 143 and flows into the nozzle pipe 21 from the vaporized gas inlet 23. It has become. This flow path is formed by a filter case 144 provided in the vaporization container 14.

  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. The solenoid coil 32 is provided and generates a magnetic force when energized, 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 container 14 is detected by the thermistor 17, and when the vaporization container 14 rises to a temperature at which the liquid fuel can be vaporized, the electromagnetic pump 3 is started and the liquid fuel in the oil pan 2 is pumped up. It 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 to the vaporization container 14 is vaporized by contacting the inner surface of the vaporization container 14 and becomes vaporized gas. When the temperature of the vaporization vessel 14 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 rate becomes slow, but streaky irregularities are formed on the inner surface of the vaporization vessel 14. As a result, the spheroidization and rolling are alleviated, and the liquid fuel can be efficiently vaporized to generate vaporized gas.

  Since the vaporized gas flow path is formed in the vaporization container 14 by the filter case 144, the vaporized gas flows into the nozzle pipe 21 through this flow path, and is ejected from the ejection port 22 toward the burner. . Specifically, the vaporized gas passes through the space 146 and flows into the filter case 144 from both end faces of the cylindrical filter case 144, and after passing through the vaporized filter 143 in the filter case 144, the vaporized gas flow It flows into the nozzle pipe 21 from the inlet 23.

  The vaporized gas contains not only a small amount of high-boiling components, but most of these high-boiling components are first deposited in the space 146, and when passing through the vaporization filter 143, fine tar is also trapped in the pores of the filter. Since they are collected, the high-boiling components are almost removed before they flow into the nozzle pipe 21. In addition, since most of the high-boiling components accumulate in the space 146, the amount of tar collected in the vaporization filter 143 is reduced, and clogging of the vaporization filter is reduced, so that the lifetime of the vaporizer can be extended. .

  In addition, 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 favorably maintained.

  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 the thermistor 17, and energization of the heater 12 is controlled so that the temperature of the vaporization container 14 becomes a temperature suitable for vaporization of the liquid fuel, and the heat recovered by the heat recovery unit 11 is controlled. If the vaporization 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 the energization to the solenoid coil 32 is stopped at the same time. 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. .

  FIG. 4 shows a front sectional view of the vaporization container 14 in Embodiment 2 of the present invention. The present embodiment is different from the first embodiment in that the filter case 144 is a substantially box-shaped container having an opening surface 145 on one surface.

  A vaporized gas inlet 23 is formed in the nozzle pipe 21 penetrating the filter case 144 at a position facing the bottom surface of the filter case 144. Thereby, since vaporized gas is allowed to pass through the entire vaporization filter 143, tar can be collected by the entire vaporization filter 143, and tar collection efficiency can be increased. In the drawing, the vaporization filter 143 is arranged only in a part of the filter case 144 and the vaporized gas inlet 23 is not covered, but is arranged in the entire filter case 144 so as to cover the vaporized gas inlet 23. You may make it.

  In the above configuration, before the liquid fuel supplied to the vaporization container 14 becomes vaporized gas and is ejected from the ejection port 22, the liquid fuel first contacts the inner surface of the vaporization container 14 and then vaporizes, and then passes through the space portion 146. It flows into the filter case 144 from the opening surface 145 of the filter case 144 and passes through a flow path in which high boiling point components are removed while passing through the vaporization filter 143 and flows into the nozzle pipe 21 from the vaporized gas inlet 23. It is like that.

  FIG. 5 shows a front sectional view of the vaporization container 14 in Embodiment 3 of the present invention. The present embodiment is different from the second embodiment in that the filter case 144 is a substantially box-shaped container having an opening surface 145 on the upper surface.

  Since the vaporized gas has a low specific gravity, it stays in the upper part of the vaporization container 14. Since the filter case 144 has the opening surface 145 on the upper side, the vaporized gas generated in contact with the inner surface of the vaporization container 14 passes through the space portion 146 evenly toward the opening surface 145, and the space portion 146. Tar does not accumulate on only a part of the area. Therefore, since tar can be accumulated in the entire space portion 146, the volume of the space portion 146 can be used effectively.

  FIG. 6 is a front sectional view of the vaporization container 14 in Embodiment 4 of the present invention. Here, differences from the first to third embodiments will be described.

  In the vaporization container 14, a first vaporization filter 147 and a second vaporization filter 148 made of a porous member, and a filter case 144 for housing the second vaporization filter 148 are provided, and the nozzle pipe 21 is connected to the filter case 144. It is arranged through.

  The first vaporization filter 147 is disposed at the bottom of the vaporization container 14 and has a role as a vaporization promoting element for promoting vaporization of the liquid fuel supplied to the vaporization container 14. On the other hand, the second vaporization filter 148 is disposed above the first vaporization filter 147 in a state accommodated in the filter case 144, and mainly captures high-boiling components contained in the vaporized gas vaporized by the first vaporization filter 147. It has a role as a collecting filter to collect. For this reason, it is desirable to use a second vaporization filter 148 having a smaller pore size and finer pores than the first vaporization filter 147.

  The filter case 144 is a substantially box-shaped container having an opening surface 145 on the upper side. The second vaporization filter 148 is accommodated therein, and a space 146 is formed between the filter case 144 and the first vaporization filter 147. Thus, the second vaporization filter 148 is held.

  The space portion 146 is provided for depositing a high boiling point component contained in the vaporized gas as tar before the second vaporization filter 148. When the second vaporization filter 148 is clogged with tar, the amount of vaporized gas ejected from the nozzle portion 20 is reduced. When the second vaporization filter is completely clogged, combustion cannot be continued. Since the amount of tar collected by the second vaporization filter 148 is reduced by depositing tar in the space 146, clogging of the second vaporization filter 148 is reduced. Further, the volume of the space 146 is larger than the volume of the hole of the second vaporization filter 148, and a large amount of tar can be deposited.

  In the vaporizer configured in this way, the liquid fuel supplied to the vaporization container 14 is vaporized by the first vaporization filter 147 before being vaporized gas and ejected from the ejection port 22, and then the space 146 is formed in the vaporization device 14. The high boiling point component is removed while passing through the second vaporization filter 148 from the opening surface 145 of the filter case 144, and flows into the nozzle pipe 21 from the vaporized gas inlet 23. It is designed to pass through the road. This flow path is formed by a filter case 144 provided in the vaporization container 14.

DESCRIPTION OF SYMBOLS 14 Vaporization container 20 Nozzle part 23 Vaporized gas inflow port 143 Vaporization filter 144 Filter case (holding member)
145 Opening surface 146 Space 147 First vaporization filter 148 Second vaporization filter

Claims (4)

A vaporization container that heats liquid fuel to be vaporized gas, and a nozzle portion that ejects the vaporized gas are provided. The nozzle portion is disposed through the vaporization container and has a vaporized gas inlet through which vaporized gas flows. A vaporization filter comprising a porous member in the vaporization container and a holding member for holding the vaporization filter in a predetermined position, and a space is provided around the holding member , and said vaporized gas inlet is provided at a position opposed to the inner wall of the holding member, the vaporized gas is vaporized, wherein the TURMERIC suited to the vaporized gas inlet from the space through the vaporizing filter apparatus.   2. The holding member has a bottomed shape with an opening surface, and the nozzle portion is disposed through the holding member so that the vaporized gas inlet faces the bottom surface of the holding member. The vaporizer described.   The vaporizer according to claim 2, wherein the holding member is disposed with an opening surface facing upward.   A first vaporization filter disposed at the bottom of the vaporization container and a second vaporization filter retained by the holding member are provided, and the second vaporization filter is disposed above the first vaporization filter so as to form a space in the vaporization container. The vaporizer according to claim 1, wherein the vaporizer is provided.

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