JP5525989B2 - Vaporizer - Google Patents

Description

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

  For example, a vaporizer that is used in petroleum fuel equipment such as an oil fan heater and that heats and vaporizes kerosene generally has the following configuration.

  A cylindrical vaporization section for heating and vaporizing liquid fuel (kerosene), and a vaporized gas heated and vaporized in the vaporization section, communicating with the vaporization section, are ejected from an outlet at the tip and ignited and burned by a burner. For example, the vaporizing section is provided with an inner tube to which the liquid fuel is supplied from the base end portion inside a cylindrical heating element, which is used as a pre-stage vaporizing chamber. A heating element is stored in a storage tube, and an outer tube that communicates with the inner tube at the tip is provided outside the storage tube, and the inside of the outer tube, that is, the space between the outer tube and the storage tube, is provided in the preceding vaporization chamber. The latter vaporization chamber communicates with the nozzle, and a communication port communicating with the nozzle portion is provided on the downstream side of the latter vaporization chamber.

  On the other hand, the nozzle portion is provided with the ejection port at the distal end portion of a cylindrical nozzle body portion communicating with the communication port, and a solenoid is disposed on the proximal end side, and the solenoid moves forward and backward within the nozzle body portion. A movable piece is provided, and a valve rod that opens and closes the jet outlet is provided at the tip of the movable piece. From the state in which the jet outlet is closed by an open / close needle valve at the tip of the valve rod, Contrary to this, the movable piece is moved to the base end by a solenoid, the valve rod is moved backward, the ejection port is opened, and the vaporized gas is ejected.

  Conventionally, in the vaporization part of such a vaporizer, the inner surface of the inner pipe is shallowly formed in order to increase the heat transfer area of the inner surface of the inner pipe to prevent a hopping phenomenon caused by kerosene film boiling and to generate a stable vaporized gas. Grooves were formed to increase the contact area with kerosene and to make kerosene stay better.

  However, when the amount of kerosene inflow, such as oil fan heaters for business use, is large, the heat transfer area and kerosene contact area are insufficient in the shallow groove, and the residence time of kerosene is short, resulting in complete heat conduction to kerosene. Without being performed, the temperature of the inner tube rose excessively, and there was a problem in the generation of stable vaporized gas and the heat resistance of the inner tube.

  In addition to the problem of the front vaporization chamber inside the inner pipe, kerosene will not vaporize with stability unless heat is uniformly and efficiently transmitted from the heating element and its storage pipe in the rear vaporization chamber inside the outer pipe. Moreover, if the heat transfer area is increased too much, problems such as clogging with tar also occur.

  To explain further, kerosene, for example, may cause various problems because its own vapor generally causes film boiling interposed between the inner surface of the inner tube and kerosene.

  For example, kerosene vaporizes in the shortest time at about 250 ° C, but the vaporization time gradually increases at higher temperatures than this, and film boiling becomes remarkable at about 300 ° C and above, and the vaporization time becomes considerably long. In the film boiling state, if the vaporizing portion is inclined, a hopping phenomenon in which oil suitability rolls down occurs, vaporization is not stable, and pulsation combustion occurs.

  The present invention solves such problems, and dramatically increases the heat transfer area / contact area of the inner surface of the inner tube, which is the pre-stage vaporization chamber, with a simple configuration, and sufficiently retains liquid fuel such as kerosene. Stable vaporized gas can be efficiently generated by preventing excessive temperature rise of the inner pipe, and heat can be efficiently and evenly transferred to a small passage without tar clogging in the rear vaporization chamber inside the outer pipe. An object of the present invention is to provide an excellent vaporizer capable of instantaneously heating and raising the post-stage vaporization chamber even during ignition (at the beginning of combustion) and enabling stable ignition.

  The gist of the present invention will be described with reference to the accompanying drawings.

The vaporizing section 1 for heating and vaporizing the liquid fuel, and the nozzle section 2 communicating with the vaporizing section 1 and ejecting the vaporized gas heated and vaporized by the vaporizing section 1 from the jet outlet 3 at the tip end portion. the outer tube 7 provided in the tube 5 is the liquid fuel inside the cylindrical outgoing Netsutai 4 is supplied to form a pre-stage vaporization chamber 6, communicating with the inner tube 5 to the outside of the heating element 4 A rear vaporization chamber 8 that communicates with the preceding vaporization chamber 6 is formed, and a communication port 9 that communicates with the nozzle portion 2 is provided in the subsequent vaporization chamber 8, and the nozzle portion 2 includes the communication port The nozzle 3 is provided at the tip of the nozzle body communicating with the nozzle 9, and the solenoid 10 is disposed on the base end side. The solenoid 10 moves the jet to the tip of the movable piece 11 that moves forward and backward within the nozzle body. In the vaporizer with a valve rod 12 that opens and closes the outlet 3 Te, wherein the tubular sintered metal net 13 provided on the inner surface of the inner tube 5 to form a pre-stage vaporization chamber 6, for accommodating said outer tube 7 for forming the subsequent vaporizing chamber 8 of the tubular heating element 4 A heat transfer pipe 16 in which convex strips 14 and concave strips 15 serving as the vaporized gas passages are alternately arranged in the circumferential direction is provided between the storage pipe 17 and the latter stage vaporization chamber 8 through the multiple passages. The cylindrical heating element 4 is stored between the inner tube 5 and the storage tube 17 together with a filler 28 that efficiently transfers heat, and the cylindrical heating element is thermally expanded. 4 is provided on the outer peripheral surface of the inner tube 5 to suppress the movement of the inner tube 5 toward the base end side of the inner tube 5, and the ring-shaped pressing member 18 is provided on the outer peripheral surface of the inner tube 5. A ring portion 20 that is movably fitted to the outer periphery of the inner tube 5 and a circumferential direction that is elastically abutted against the outer peripheral surface of the inner tube 5 and can be bent by a plurality of slit portions 21. The follower movable part 19 is formed in parallel, and the follower movable part 19 is brought into elastic contact with the outer peripheral surface of the inner tube 5 and the base end of the cylindrical heating element 4 at the fitted ring part 20. The ring-shaped pressing member 18 follows the inner tube 5 along the inner tube 5 when the tubular heating element 4 moves toward the proximal side with respect to the inner tube 5. The follower movable part 19 bends and the fitted ring part 20 follows and moves along the inner tube 5 toward the base end side to hold down the cylindrical heating element 4 and hold it. The present invention relates to a vaporizer characterized by being configured as described above .

Further, the outer tube 7 is provided outside the inner tube 5 with the base end portion as the liquid fuel supply side, and the distal end portion of the inner tube 5 and the distal end portion of the outer tube 7 are provided in communication with each other. Provided between the inner tube 5 and the outer tube 7 is the cylindrical or cylindrical heating element 4, and the liquid fuel supplied from the base end of the inner tube 5 is supplied to the inner tube 5. and the front vaporization chamber 6 for heating vaporized by the heating element 4, the subsequent vaporization chamber 8 on the downstream side of the front vaporization chamber 6 between the housing tube 17 for housing the heating element 4 and the outer tube 7 The communication port 9 is provided on the downstream side of the post-stage vaporization chamber 8, and the liquid fuel supplied from the base end portion of the inner pipe 5 is supplied by the heating element 4 in the pre-stage vaporization chamber 6 and the post-stage vaporization chamber 8. is heated and vaporized configured to be supplied from the communication port 9 to the nozzle unit 2, the tubular obtained by sintering processes tubular wire mesh 2. The vaporizer according to claim 1, wherein a metal mesh 13 is inserted and disposed along the inner surface of the inner pipe 5 to increase a heat transfer area for heating and vaporizing the liquid fuel. It is.

  3. The cylindrical sintered wire mesh 13 is a cylindrical wire mesh formed by superposing a plurality of cylindrical wire meshes into a heavy cylinder structure, and having a sintered structure. This relates to a vaporizer.

The heat transfer tube 16 is not circular in cross-sectional shape, and has a shape in which the outer peripheral edge is indented into and out of the inside and outside, and the outer circumferential surface has a length in the axial direction on the convex strip portion 14 and the concave strip portion 15. DOO many a structure that is alternately arranged form in the circumferential direction, wherein this outer tube 7 so as to contact the outer surface of the housing tube 17 before KiOsamu this the projection 14 is for accommodating the heating element 4 by inserting disposed between the pay line 17, according to any one of claims 1 to 3, characterized by being configured such that the passage to the subsequent vaporizing chamber 8 is multiple compartments formed This relates to the vaporizer.

  The nozzle portion 2 includes a movable end 11 and a proximal end tubular portion 22 that houses the valve rod 12 at the distal end of the movable piece 11, and a distal end tubular portion 23 provided with the ejection port 3 at the distal end. The base end side cylindrical portion 22 has the bottom portion as the front end side and has a square cross section for fixing 24 having a square cross section by deep drawing and the solenoid 10 disposed on the outer periphery to accommodate the movable piece 11 therein. And a valve rod through hole 26 communicating with the distal end side cylinder portion 23 is provided at the bottom, and the valve rod 12 is prevented from tilting at the hole edge of the valve rod through hole 26. 4. The vaporization apparatus according to claim 1, wherein a tilt prevention support edge 27 is provided.

  Since the present invention is configured as described above, the heat transfer area / contact area of the inner surface of the inner tube, which is the pre-stage vaporization chamber, is dramatically increased with a simple configuration, and liquid fuel such as kerosene is sufficiently retained to maintain the inner tube. Stable vaporized gas can be generated efficiently by preventing excessive temperature rise, and even in the rear vaporization chamber inside the outer tube, it is easily formed in a small passage without tar clogging, and heat is efficiently and evenly transferred to ensure ignition. Even in the initial stage of combustion, the subsequent vaporization chamber can be heated and heated instantaneously, and stable ignition can be achieved.

  That is, by providing a cylindrical sintered wire mesh that has excellent heat resistance and greatly increases the heat transfer area on the inner surface of the inner tube that becomes the pre-stage vaporization chamber, the heat transfer of the heating element is improved, and the excessive temperature of the inner tube is increased. A structure in which a rise can be prevented, film vaporization hardly occurs, a stable vaporized gas can be generated, and a heat transfer tube that can be partitioned into a small passage is inserted inside the outer tube serving as a subsequent vaporization chamber. Therefore, the heat of the heating element is efficiently and uniformly transferred, and more stable vaporized gas can be generated, and this small passage is formed by the protrusions and recesses on the outer peripheral surface of the heat transfer tube along the tube axis direction. As a result of the formation of many slender strips, it is difficult to clog even if tar is generated, and it is efficiently and evenly transferred to the storage tube and outer tube, so that the subsequent vaporization chamber is also heated and heated instantaneously during ignition (at the beginning of combustion). Since it can be heated, it has a simple structure and more stable vaporization. Together to generate and supply of is performed, an extremely excellent vaporization apparatus that can realize stable ignition and initial combustion.

In the present invention, for example, each metal (stainless steel) tube and a ceramic cylindrical heating element have different coefficients of thermal expansion, so that ON / OFF of energization to the cylindrical heating element is repeated. The cylindrical heating element tends to move due to this, but there is a problem that if this is simply pressed and fixed by the pressing member, the pressing member will break, but the present invention has a configuration in which the pressing member is movable. By improving, the movement of the cylindrical heating element can be absorbed, and this breakage can be prevented, resulting in a vaporizer excellent in durability and in practical use.

In addition, the pressing member can be easily mounted, and the vaporizing apparatus can be moved in accordance with the movement of the cylindrical heating element with a simple configuration and can absorb the movement, and is more practical.

  Further, in the inventions according to claims 2 to 4, the present invention can be easily realized with a simpler configuration, and the vaporizer is further excellent in practicality.

  In particular, in the invention of claim 3, the heat transfer area on the inner surface of the inner pipe can be further dramatically increased without greatly increasing the cost, the contact area with the liquid fuel can be further increased, and further improved. It becomes the outstanding vaporization apparatus by which the effect of this invention is exhibited.

Further, in the invention described in claim 5, the nozzle part can be manufactured without involving the welding work of a large number of parts, that is, the manufacturing work is facilitated by reducing this welding work, and mass productivity is improved, and there is a risk of vaporized gas leakage. In addition, it is possible to form an anti-tilt support edge (support protrusion) that prevents the valve rod from tilting with a simple structure and can be manufactured easily, and prevents the valve rod from tilting during gas ejection and smoothly from the outlet. It becomes a more excellent vaporizer capable of maintaining the ejection and performing stable combustion.

It is a description perspective view of a present Example. It is a description exploded perspective view of a present Example. It is a description plane sectional view of a present Example. It is explanatory side sectional drawing of the vaporization part of a present Example. It is a perspective view of the heat exchanger tube of a present Example.

  An embodiment of the present invention which is considered to be suitable will be briefly described with reference to the drawings showing the operation of the present invention.

  Liquid fuel such as kerosene supplied from the base end portion of the inner tube 5 serving as the pre-stage vaporizing chamber 6 is heated and vaporized through the inner tube 5 by heat from the heating element 4 (ceramic cylindrical heater or the like). It is sent to the downstream subsequent vaporization chamber 8 which is folded back at the tip.

  For example, an inner tube 5 is disposed inside a cylindrical heating element 4, and the inner tube 5 is heated by the cylindrical heating element 4. On the inner surface of the inner tube 5, for example, a cylindrical wire mesh is provided. Since the sintered wire mesh 13 obtained by sintering is inserted and disposed, the heat transfer area is dramatically increased, heat transfer to the liquid fuel is performed well, and the temperature of the inner tube 5 is excessively increased. In addition, since the contact area with the liquid fuel is increased and the liquid fuel is captured and retained satisfactorily because of the net shape, stable vaporized gas is generated.

  In addition, since the heat transfer area is increased by the sintered wire mesh 13 that has been sintered, it is easy to manufacture, and since it is sintered, it has excellent heat resistance, and since it is hardened by sintering, it is inserted into the inner tube 5. Work is easier and production is easier.

  In addition, for example, if a multi-cylinder structure in which a plurality of cylindrical sintered wire meshes 13 are superposed, the heat transfer area can be further increased without a significant increase in cost, and the above-mentioned functions and effects can be further improved. Will be demonstrated.

Further, on the outside of the heating element 4 provided retract and tube 17, provided with an outer tube 7 which further communicates with a made with a gap the inner tube 5 and the distal end portion vaporized gas passage to the outside, the outer tube 7 The vaporization gas 8 heated and vaporized in the pre-stage vaporization chamber 6 or the liquid fuel that is not sufficiently vaporized is turned back from the pre-stage vaporization chamber 6 and sent to the post-stage vaporization chamber 8. In this case, however, the heat from the heating element 4 is uniformly and efficiently heated by the heat transfer tube 16 that partitions the vaporized gas passage, and is completely vaporized. Through the communication port 9 provided downstream, the nozzle portion 2 is heated. And is ejected from the ejection port 3 of the nozzle portion 2.

Specifically, the inside of the outer tube 7, downstream the vaporization chamber 8 between the housing tube 17 housing the immediate sporadic Netsutai 4 and the outer tube 7, insert disposed the heat transfer tube 16, Further, the subsequent vaporization chamber 8 is also heated and vaporized uniformly and efficiently.

  The heat transfer tube 16 is not simply a cylinder, that is, not a simple cross-sectional circle, and the outer edges of the cross section in which the protruding strips 14 and the concave strips 15 serving as the passage of the vaporized gas are alternately arranged in the circumferential direction are inside and outside. A heat transfer tube 16 having an uneven shape is inserted and arranged, and the latter vaporization chamber 8 is partitioned into a plurality of elongated small passages.

  Therefore, vaporized gas and liquid fuel that has not been vaporized are not configured to pass through a meandering passage, but are clogged with tar because they pass through an elongated small passage that has a length in the tube direction and a sufficient cross-sectional area. In addition, since the post-stage vaporization chamber 8 is formed in a plurality of sections in the narrow small passage, it can be uniformly and efficiently transferred to achieve a more stable supply of vaporized gas. This can be realized with a simple configuration by simply and efficiently transferring heat from the heating element 4 by inserting and arranging the tube-shaped heat transfer tube 16. Therefore, it can be burned with good stability in a wide combustion range from large thermal power to small thermal power.

  That is, for example, the heat transfer tube 16 formed in the above-mentioned shape can be manufactured simply by being inserted and disposed so as to contact the cylindrical heating element 4 or the storage tube 17 for storing it, and is easy to manufacture and excellent in mass productivity.

Further, a ring-shaped pressing member 18 is provided on the outer peripheral surface on the proximal end side of the inner tube 5 to prevent the tubular heating element 4 from moving toward the proximal end portion of the inner tube 5 due to thermal expansion. The ring-shaped pressing member 18 is bent by a plurality of slit portions 21 which are elastically abutted against the outer peripheral surface of the inner tube 5 and are fitted to the outer peripheral surface of the inner tube 5 so as to be movable. And a plurality of follower movable parts 19 formed side by side in the circumferential direction. The follower movable parts 19 are brought into elastic contact with the outer peripheral surface of the inner tube 5 and the tubular heating element is formed by the fitted ring part 20. 4 is configured to hold the base end portion of the ring-shaped heating element 4, and when the cylindrical heating element 4 moves toward the base end side with respect to the inner tube 5, the ring-shaped pressing member 18 as a whole follows the inner tube 5. The follow-up movable part 19 is bent along the base end side or bent, and the fitted ring part 20 is bent. To follow moving into the inner tube 5 in accordance with the proximal end side, because configured to hold the hold-down of the tubular heating element 4, the movement of the tubular heating element 4 resulting from the difference in thermal expansion coefficients of each portion Is absorbed, and the ring-shaped pressing member 18 can be prevented from being broken.

  Further, the nozzle portion 2 that communicates with the vaporizing portion 1 and ejects the vaporized gas heated and vaporized in the vaporizing portion 1 from the nozzle outlet 3 at the tip portion is provided at the tip portion of the nozzle main body portion that communicates with the communication port 9. A solenoid 10 is provided on the base end side, and a valve rod 12 for opening and closing the jet outlet 3 is provided at the tip of a movable piece 11 that moves forward and backward within the nozzle body by the solenoid 10. Although it is a structure, this is improved and the nozzle part 2 is connected to the movable piece 11 and the base end side cylinder part 22 that houses the valve rod 12 at the distal end of the movable piece 11, and the jet port 3 at the distal end. The base end side cylindrical portion 22 is provided with a square cross section for fixing 24 having a square cross section by deep drawing with the bottom portion as the front end side and the solenoid 10 on the outer periphery. If a proximal cylindrical portion 25 for accommodating the movable piece 11 is provided inside, In addition, a valve rod through hole 26 communicating with the distal end side cylinder portion 23 is provided at the bottom, and a tilt prevention support edge 27 for preventing the valve rod 12 from tilting is provided at the hole edge of the valve rod through hole 26. If it is configured, the nozzle portion 2 can be manufactured without welding work of a large number of parts, that is, by reducing this welding work, the manufacturing becomes easy and the mass productivity is improved, and the risk of vaporized gas leakage is reduced. In addition, it is possible to form a tilt prevention support edge 27 (support projection) that facilitates manufacture with a simple configuration and prevents the valve rod 12 from tilting, and prevents the valve rod 12 from tilting when gas is ejected and smoothly from the outlet 3. This makes it possible to hold the jet and perform stable combustion.

  Specific embodiments of the present invention will be described with reference to the drawings.

  In this embodiment, the present invention is applied to a vaporizer that is provided in an oil-burning device such as an oil fan heater, which heats and vaporizes kerosene and ignites and burns it with a burner, and heats and vaporizes liquid fuel (kerosene). And a cylindrical nozzle portion 2 that communicates with the vaporizing portion 1 and that crosses the vaporizing portion 1 and jets the vaporized gas heated and vaporized by the vaporizing portion 1 from the jet outlet 3 at the tip. It is configured.

  The vaporizing section 1 is provided with an inner tube 5 to which the liquid fuel is supplied from the base end portion inside a cylindrical heating element 4, which is used as a pre-stage vaporizing chamber 6, and the cylindrical heating element 4 is accommodated in a storage tube. 17, and an outer tube 7 communicating with the inner tube 5 at the tip portion is provided outside the housing tube 17 through a gap serving as a vaporized gas passage, and the inside of the outer tube 7, that is, the outer tube 7 and the outer tube 7. A rear-stage vaporizing chamber 8 that communicates with the front-stage vaporizing chamber 6 is formed between the storage pipe 17 and a communication port 9 that communicates with the nozzle portion 2 on the downstream side of the rear-stage vaporizing chamber 8.

  On the other hand, the nozzle portion 2 is provided with the nozzle 3 at the distal end portion of the cylindrical nozzle body portion communicating with the communication port 9 and the solenoid 10 at the proximal end side. A movable piece 11 that moves forward and backward within the section is provided, and a valve rod 12 that opens and closes the jet outlet 3 is provided at the tip of the movable piece 11, and the jet outlet 3 is closed by an open / close needle valve at the tip of the valve rod 12. In this configuration, the movable piece 11 is moved to the proximal end portion by the solenoid 10 against the closing bias by the elastic body 29, the valve rod 12 is retreated, the outlet 3 is opened, and the vaporized gas is ejected. Yes.

  More specifically, the vaporizing section 1 is provided with the cylindrical heating element 4 outside the inner pipe 5 with the base end as the liquid fuel supply side as described above, and with the storage pipe 17 provided outside the inner pipe 5. The outer tube 7 is provided outside the storage tube 17 through a gap serving as a vaporized gas passage, and the distal end portion of the inner tube 5 and the distal end portion of the outer tube 7 are provided in communication with each other closed by a cap portion. Thus, the inside of the inner pipe 5 serves as the front-stage vaporizing chamber 6, and the space between the outer pipe 7 and the storage pipe 17 that houses the heating element 4 serves as the rear-stage vaporizing chamber 8 that is downstream of the front-stage vaporizing chamber 6. The communication port 9 is provided on the downstream side of the rear vaporization chamber 8, and the liquid fuel supplied from the base end portion of the inner pipe 5 is heated and vaporized by the heating element 4 in the front vaporization chamber 6 and the rear vaporization chamber 8. Thus, the nozzle 9 is configured to be supplied from the communication port 9.

  In this embodiment, a cylindrical sintered wire mesh 13 is provided on the inner surface of the inner tube 5 that forms the former vaporization chamber 6, and the outer tube 7 and the cylindrical heating element 4 that form the latter vaporization chamber 8 are accommodated. A heat transfer tube 16 in which convex strips 14 and concave strips 15 serving as vapor gas passages are alternately arranged in the circumferential direction is provided between the storage tube 17 and the rear vaporization chamber 8. A compartment is formed in the small passage.

  Specifically, the cylindrical sintered wire mesh 13 obtained by sintering the cylindrical wire mesh is inserted and disposed along the inner surface of the inner tube 5 to provide a heat transfer surface area for heating and vaporizing the liquid fuel. It is increasing. The cylindrical sintered wire mesh 13 is a cylindrical wire mesh formed by superposing two cylindrical wire meshes to form a double tube structure, and is configured by sintering.

  The heat transfer tube 16 is not circular in cross-sectional shape, and has a shape in which the outer peripheral edge is indented into and out of the inside and outside, and the outer circumferential surface has a length in the axial direction on the convex strip portion 14 and the concave strip portion 15. Are arranged in parallel in the circumferential direction, and the outer tube 7 and the storage tube 17 are arranged so that at least the inner ridge edge of each recess 15 is in contact with the outer surface of the storage tube 17. By inserting and arranging between them, a large number of small passages elongated in the tube axis direction are formed in the latter-stage vaporizing chamber 8.

  Further, the cylindrical heating element 4 made of ceramic is stored between the inner tube 5 made of metal (stainless steel) and the storage tube 17 together with a filler 28 for uniformly transferring heat, A ring-shaped pressing member 18 is provided on the outer peripheral surface of the inner tube 5 to prevent the tubular heating element 4 from moving toward the proximal end side of the inner tube 5 due to thermal expansion. Is fitted along the inner tube 5 and is provided so as to be movable along the outer peripheral surface of the inner tube 5 without being fixed to the inner tube 5.

Further, the ring-shaped pressing member 18 is provided with a holding portion for holding the elastic ring on the outer peripheral surface of the inner tube 5 in the ring portion 20 to be fitted to the inner tube 5 in a sliding manner. Then, this fitting ring portion 20 is used as a portion that holds the base end portion of the cylindrical heating element 4, and a plurality of slit portions 21 are formed in the radial direction in the holding portion to radiate a follow-up movable portion 19 that can be bent. a plurality juxtaposed formed in the direction, the pressing member 18 itself follow moves in response to movement of the tubular heating element 4 due to thermal expansion, or the following movable unit 19 follows the movable and the fitting ring by the following movable The portion 20 is configured to follow and move along the inner tube 5 and hold down the cylindrical heating element 4.

  Specifically, the ring-shaped pressing member 18 of this embodiment is in elastic contact with the ring portion 20 to be movably fitted to the outer peripheral surface of the inner tube 5 and the outer peripheral surface of the inner tube 5. The follower movable part 19 is formed in parallel by a plurality of slit parts 21 in the circumferential direction. The follower movable part 19 is brought into elastic contact with the outer peripheral surface of the inner tube 5 and the fitted ring part 20 When the proximal end of the cylindrical heating element 4 is pressed and the tubular heating element 4 moves toward the proximal end with respect to the inner tube 5, the whole follows the inner tube 5 along the inner tube 5. The follow-up movable part 19 is bent and the follow-up movable part 19 is bent, and the fitted ring part 20 follows and moves toward the base end by the amount of the bending, so that the cylindrical heating element 4 is pressed and held. It is composed.

  On the other hand, the nozzle portion 2 includes a movable-end piece 11 and a small-diameter base end-side tube portion 22 that houses the valve rod 12 at the end portion of the moveable piece 11 and a tip-end side tube provided with the jet port 3 at the tip end. The base part 22 is connected to the part 23 by welding, etc., and the base side cylinder part 22 is secured to the fixing bracket 31 following the tip small diameter part 30 by deep drawing with the bottom part as the tip side. A fixing cross-sectional square part 24 having a square cross-section to be locked and a base cylindrical part 25 in which the solenoid 10 is disposed on the outer periphery and the movable piece 11 is housed are integrally formed, and the distal end A valve rod through-hole 26 that communicates with the distal-end side cylinder portion 23 is formed by punching in the bottom that becomes the tip surface of the small-diameter portion 30, and the hole shape of the valve rod through-hole 26 is made uneven. The valve rod 12 is enclosed as It forms a tilt prevention support edge 27 to stop.

  As a result, even when the valve rod 12 is retracted to open the ejection port 3, the tilting prevention support edge 27 supports the vaporized gas so that the vaporized gas is always ejected smoothly without dripping and tilting, and stable combustion can be maintained.

  Note that the present invention is not limited to the embodiments, and the specific configuration of each component can be designed as appropriate.

DESCRIPTION OF SYMBOLS 1 Vaporization part 2 Nozzle part 3 Outlet 4 Heat generating body, cylindrical heating element 5 Inner pipe 6 Front | former stage vaporization chamber 7 Outer pipe | tube 8 Subsequent stage vaporization chamber 9 Communication port
10 Solenoid
11 Movable piece
12 Valve rod
13 Sintered wire mesh
14 ridges
15 Concave
16 Heat transfer tube
17 Storage tube
18 Ring-shaped holding member
19 Following moving parts
20 Fitted ring part
21 Slit
22 Base end tube
23 Tip tube
24 Square section for fixing
25 Base cylindrical part
26 Valve rod through hole
27 Anti-tilt support edge
28 Filler

Claims (5)

A vaporizing section for heating and vaporizing the liquid fuel, and a nozzle section communicating with the vaporizing section and ejecting the vaporized gas heated and vaporized by the vaporizing section from a jet outlet at the tip, the said vaporizing section being formed in a cylindrical shape . An inner tube to which the liquid fuel is supplied is provided inside the heat body to form a pre-stage vaporization chamber, and an outer tube that communicates with the inner tube is provided outside the heat generator to provide a post-stage vaporization that communicates with the pre-stage vaporization chamber. A chamber is formed, and a communication port that communicates with the nozzle portion is provided in the latter stage vaporization chamber, and the nozzle portion is provided with the ejection port at a distal end portion of a nozzle main body portion that communicates with the communication port and a proximal end In the vaporizer having a configuration in which a solenoid is provided on the side, and a valve rod that opens and closes the ejection port is provided at the tip of a movable piece that moves forward and backward within the nozzle body by the solenoid, the former vaporization chamber is formed. A tube on the inner surface of the inner tube Of sintered wire mesh provided between the housing tube for housing the outer tube and the tubular heating element to form a second-stage vaporization chamber, and a convex portion and a concave portion serving as a passage for the vaporized gas Heat transfer tubes arranged alternately in the circumferential direction are provided, and the latter vaporization chamber is partitioned into a number of passages, and the filler and the filler that efficiently transfer heat are provided between the inner tube and the storage tube. A ring-shaped pressing member is provided on the outer peripheral surface of the inner tube for accommodating the cylindrical heating element and suppressing the movement of the cylindrical heating element to the proximal end side of the inner tube due to thermal expansion. A ring-shaped pressing member is formed in a plurality of juxtaposed in the circumferential direction by a ring portion that is movably fitted on the outer peripheral surface of the inner tube and a plurality of slit portions that are elastically contacted with the outer peripheral surface of the inner tube and can be bent. The follower movable part is elastically brought into contact with the outer peripheral surface of the inner tube. In addition, the ring-shaped heating element is configured to press the proximal end portion of the cylindrical heating element with the fitted ring portion, and follow the movement of the cylindrical heating element toward the proximal end side with respect to the inner tube. The entire pressing member moves along the inner tube to the proximal end side, or the tracking movable portion bends and the fitted ring portion moves along the inner tube to the proximal end side to move the tube. A vaporizer characterized in that it is configured to hold down and hold a heating element in the form of a tube . The outer pipe is provided outside the inner pipe with a base end portion on the liquid fuel supply side, and the distal end portion of the inner pipe and the distal end portion of the outer pipe are provided in communication with each other. The pre-stage vaporizing chamber is provided with a heating element arranged in a cylindrical shape or in a cylindrical shape, and the liquid fuel supplied from a base end portion of the inner pipe is heated and vaporized by the heating element. and then, a second-stage vaporization chamber on the downstream side of the front vaporization chamber between said housing tube for housing the heating element and the outer tube, the communication opening provided on the downstream side of the subsequent vaporization chamber, said The liquid fuel supplied from the base end portion of the pipe is heated and vaporized by the heating element in the front vaporization chamber and the rear vaporization chamber, and is supplied to the nozzle portion from the communication port. The cylindrical sintered wire mesh that has been subjected to the binding treatment is inserted and disposed along the inner surface of the inner tube, Vaporizing apparatus according to claim 1, wherein the increased heat transfer area for heating vaporized the body fuel.   3. The vaporizer according to claim 2, wherein the cylindrical sintered wire mesh is a cylindrical wire mesh in which a plurality of cylindrical wire meshes are overlapped to form a heavy cylinder structure and sintered. The heat transfer tube is not circular in cross-sectional shape, and has a shape in which an outer peripheral edge is recessed and protruded inward and outward, and an outer peripheral surface is provided with the protrusions and recesses having a length in the axial direction in the circumferential direction. number and configuration that is alternately arranged forming, insert disposed between the outer tube and before KiOsamu pay tube as the respective ridges abuts against the outer surface of the housing tube for accommodating the heating element The vaporizer according to any one of claims 1 to 3, wherein a plurality of the passages are formed in the rear vaporization chamber.   The nozzle portion includes the movable piece and a proximal end side cylinder portion that houses the valve rod at the distal end portion of the movable piece, and a distal end side tubular portion that is provided with the ejection port at the distal end. The section has a square section for fixing with a square section by deep drawing with the bottom section as a distal end side and a base end cylindrical section for disposing the solenoid on the outer periphery and housing the movable piece therein, and the bottom section includes the base section. 4. A valve rod through hole communicating with the distal end side cylinder portion is provided, and a tilt prevention supporting edge for preventing tilting of the valve rod is provided at a hole edge portion of the valve rod through hole. The vaporizer of any one of Claims.

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