JP2005351559A - Kerosene vaporizing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a kerosene vaporizing device less liable to tar clogging and good for vaporization. <P>SOLUTION: The kerosene vaporizing device comprises a vaporizer 5, a hollow cylindrical vaporizing chamber 13 formed in the vaporizer 5, a vaporization promoting wick 14 having a pleated body 29 formed of a thin plate material having relatively good heat conductivity and installed with its pleated portions 29a radially rod-shaped and its outer peripheral portion in contact with the inner wall of the vaporizing chamber 13 while leaving a hollow portion 30 at the center, a nozzle 34 provided in the vaporizer 5 on the longitudinal one end side of the vaporizing chamber 13 for blowing fuel gas vaporized by the vaporizing chamber 13, a burner part 7 for receiving the fuel gas blown from the nozzle 34 and burning it, a cap 32 mounted for closing the vaporizing chamber 13 at its other end side, and a fuel pipe 6 connected to the cap. The wick 14 and the vaporizing chamber 13 are each taper-shaped at the side of the nozzle 34. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a kerosene vaporization device for a Bunsen combustion apparatus in which vaporized fuel is ejected from a nozzle and burned.

  Conventional kerosene vaporizers for this type of Bunsen combustion apparatus are known as shown in FIGS. That is, in FIG. 6, 1 is a main body case of the Bunsen combustion apparatus, 2 is an oil receiving tank disposed at the bottom of the main body case 1, and 3 is a cartridge for supplying kerosene as fuel to the oil receiving tank 2. It is a tank and is detachably installed in the upper part of the oil receiving tank 2.

  4 is a pump that pumps fuel from the oil receiving tank 2, 5 is a vaporizer that heats and vaporizes the fuel supplied from the pump 4, and 6 is a fuel pipe that connects the vaporizer 5 and the pump 4.

  7 is a burner section for burning the fuel gas vaporized by the carburetor 5, 8 is a combustion cylinder covering the burner section 7, 9 is a combustion gas discharge port of the combustion cylinder 8, 10 is a blower fan, and 11 is a combustion gas discharge port A discharge port for discharging hot air generated by mixing high-temperature combustion gas discharged from the air 9 and air blown from the blower fan 10, and is provided at the lower front portion of the main body case 1.

  Next, in FIG. 7, the vaporizer 5 is made by appropriately cutting a brass forging, and a burner portion 7 is attached in the lateral direction.

  13 is a hollow cylindrical vaporizing chamber for vaporizing the fuel fed from the pump 4 and is provided in the vaporizer 5.

  Reference numeral 14 denotes a vaporization accelerating wick installed in the vaporization chamber 13, which is made of a thin plate material such as a metal net, a metal floc, a porous metal, or a porous ceramic having a relatively good thermal conductivity. The middle portion is a hollow portion 30 and is inserted into the vaporizing chamber 13.

  Reference numeral 24 denotes a heat receiving fin, which is integrally formed with the carburetor 5 and has a tip that faces a flame hole 42 described later on the burner portion 7.

  48 is a vaporizer heater, which is composed of a U-shaped sheathed heater as shown, with parallel portions attached along both sides of the vaporizer 5, and a U 34 on the nozzle 34 side which will be described later. Since the character portion does not contribute so much to the heating of the vaporizer 5, the amount of heat generated in that portion is made conservative.

  Reference numeral 32 denotes a cap for closing the insertion side of the wick 14 on one end side of the vaporizing chamber 13, which is made of a stainless material having a relatively low thermal conductivity, and is connected to the vaporizer 5 in an airtight manner by brazing. Has been. A fuel pipe 6 for supplying fuel into the vaporizing chamber 13 is connected to the cap 32.

  Reference numeral 34 denotes a nozzle that injects the fuel gas vaporized in the vaporizing chamber 13 into the burner unit 7. The fuel gas 34 is provided in the vaporizer 5 on the other end side in the longitudinal direction of the vaporizing chamber 13. It communicates via the communication path 35.

  Reference numeral 42 denotes a flame hole formed in the lower skirt of the burner portion 7, and a combustion flame is generated in this portion.

  In the conventional combustion apparatus configured as described above, when the vaporizer 5 reaches the vaporization temperature of kerosene as fuel by the vaporizer heater 48, the fuel in the oil receiving tank 2 is supplied to the vaporizer 5 by the electromagnetic pump 4, The fuel gas that has been vaporized and heated by the vaporizer heater 48 is ejected from the nozzle 34 into the burner unit 7.

  At this time, the primary air is sucked into the burner section 7 by the ejector action of the jet gas, and the fuel gas and the primary air are mixed in the mixing pipe (not shown) of the burner section 7 and then ejected from the flame hole 42. Here, it is ignited by an ignition device (not shown) to form a combustion flame.

  Then, a flame sensor (not shown) that receives a signal from the flame lot confirms the presence / absence of flame, and if there is flame, it continues to burn.

  Since the heat receiving fins 24 are exposed to the combustion flame after the combustion flame is formed, the temperature of the vaporizer 5 can be maintained at the vaporization temperature of kerosene without the help of the vaporizer heater 48, and the vaporizer heater The power supply to 48 is cut off. The combustion gas generated at this time is guided upward in the combustion cylinder 8 disposed so as to cover the periphery of the burner unit 7, and mixed with the air from the blower fan 10 at the outlet of the combustion cylinder 8, It is discharged from the discharge port 11 and used for heating (see, for example, Patent Document 1).

JP 2000-329310 A

  However, in the above prior art, the vaporizer 5 is provided with a heat source part for heating the fuel in the vaporization chamber 13 to the vaporization temperature, that is, both the vaporizer heater 48 and the heat receiving fin 24 are provided outside the vaporizer 5. Therefore, it is necessary to efficiently transfer the heat supplied from the heat source part to the center of the wick 14.

  However, since the inner wall diameter of the vaporizing chamber 13 and the outer diameter of the wick 14 are the same, and the inner wall of the vaporizing chamber 13 and the outer periphery of the wick 14 are parallel, the wick 14 is inserted into the vaporizing chamber 13. In order to facilitate insertion, the wick 14 is shaped into a smaller size than the inner wall of the vaporizing chamber 13 and inserted.

  For this reason, the contact between the wick 14 and the inner wall of the vaporizing chamber 13 becomes sweet, and heat is hardly transmitted from the inner wall of the vaporizing chamber 13 to the wick 14, so that there is a problem that the wick 14 is not efficiently heated.

  Further, when the wick 14 is deformed due to repeated heating and cooling, a gap is opened between the inner wall of the vaporizing chamber 13 and the wick 14 at the center of the wick 14, and heat is transferred from the inner wall of the vaporizing chamber 13 to the wick 14. There was a problem that it was difficult to transmit and the wick 14 could not be efficiently heated.

  Further, when the vaporized fuel passes through the central portion of the wick 14 on the way to the nozzle 34, if the central portion of the wick 14 is at a low temperature, the vaporized fuel is cooled here, and the vaporized fuel is re-liquefied. Has become a problem that the wick 14 and the nozzle 34 are clogged.

  Therefore, the present invention solves the above problems and provides a long-life combustion apparatus.

  The present invention has been made to solve the above problems, and is formed of a vaporizer, a hollow cylindrical vaporization chamber formed in the vaporizer, and a thin plate material having a relatively good thermal conductivity. The fold-folding wick has a hollow portion at the center, and is formed in a rod shape so that each fold portion is radial, and its outer peripheral portion is installed in contact with the inner wall of the vaporization chamber. A nozzle provided in the vaporizer on one end side in the longitudinal direction of the vaporization chamber in order to eject the fuel gas vaporized in the vaporization chamber, and a burner portion for receiving and burning the fuel gas ejected from the nozzle In a kerosene vaporizer comprising a cap attached to close the other end of the vaporization chamber and a fuel pipe connected to the cap, the shape of the wick and the vaporization chamber is tapered so that the nozzle side is tapered. It is obtained by the Jo.

  Since the kerosene vaporization apparatus of the present invention is configured as described above, the outer peripheral portion of the wick can be sufficiently satisfactorily brought into contact with the vaporization chamber wall, so that the heat source outside the vaporizer, that is, the vaporizer heater and the heat receiving fin Heat is efficiently transmitted to the center of the wick through the shortest path through the wick folds, and kerosene can be actively vaporized in the center of the vaporization chamber.

  Also, the hollow wicking chamber formed in the vaporizer with a tapered wick can be easily inserted when the wick is inserted by adopting the tapered shape.

  In addition, by inserting the wick into the vaporization chamber and pressing it hard to press the outer periphery of the wick fold against the inner wall of the vaporization chamber, it is possible to prevent the wick from deforming even if heating and cooling are repeated over a long period of time. Since the wick and the vaporization chamber wall are in good contact with each other even when used for a long time, heat is not easily transmitted from the inner wall of the vaporization chamber to the wick, and uniform fuel vaporization can be achieved over a long period of time. Stable fuel gasification can be performed.

  In addition, since the center of the wick can be heated efficiently, vaporized fuel does not re-liquefy due to cooling when passing through the center of the wick, preventing tar generation and clogging the wick and nozzle. I won't let you down.

  An embodiment of the present invention will be described below with reference to FIGS. 1 is a plan sectional view of a kerosene vaporizer showing an embodiment of the present invention, FIG. 2 is a longitudinal sectional view of the kerosene vaporizer, FIG. 3 is a perspective view of the kerosene vaporizer, and FIG. 4 is a wick material. FIG. 5 is a perspective view of the wick, and FIG. 6 is a longitudinal sectional view of a combustion apparatus for explaining the present embodiment and a conventional example.

  The description of the same configuration as that described in the conventional example is omitted.

  In the figure, reference numeral 13 denotes a vaporizing chamber, which is a hollow cylinder formed in the vaporizer 5, and is formed in a tapered shape so that the nozzle 34 side is tapered.

  14 is a wick, for example, a copper wire mesh having a relatively good thermal conductivity is corrugated as shown in FIG. 4, that is, folded and processed into a fold-folded body 29, as shown in FIG. The same angle as the taper shape of the hollow cylindrical vaporization chamber 5 formed in the vaporizer 5 with the hollow portion 30 remaining in the center and rounded into a rod shape so that each pleat portion 29a is radial. The tapered wick 14 can be easily inserted into the vaporizing chamber 13 when the wick 14 is inserted into the vaporizing chamber 13. The wick 14 is preferably composed of a thin plate material such as a metal net, a metal floc, a porous metal, or a porous ceramic having a relatively good thermal conductivity.

  Then, after the wick 14 is inserted into the vaporizing chamber 13, the wick 14 is pressed firmly to press the outer peripheral portion of the fold portion 29 a of the wick 14 against the inner wall of the vaporizing chamber 13, so that the wick 14 can be repeatedly heated and cooled over a long period of time. The wick 14 and the inner wall of the vaporizing chamber 13 are sufficiently well in contact with each other even when used for a long period of time, so that it is difficult for heat to be transmitted from the inner wall of the vaporizing chamber 13 to the wick 14. As a result, the fuel can be uniformly vaporized over a long period of time, and the fuel can be stably gasified.

  Reference numeral 32 denotes a cap. The wick 14 is pushed in from one end side of the vaporizer 5 and inserted, and then the inserted wick 14 is pressed so as not to move, and the vaporizer 5 is hermetically connected to the vaporizer 5 by brazing. Further, since it is desired to be made of a stainless material having a relatively low thermal conductivity, heat is hardly transmitted to the fuel pipe 6 connected to the cap 32.

  A temperature detector 53 detects the temperature of the vaporizer 5 and transmits it to a control circuit (not shown).

  Next, the effect | action by the above structure is demonstrated.

  When the operation start operation of the combustion apparatus is performed, a control circuit (not shown) starts energizing the carburetor heater 48.

  Then, both sides of the vaporizer 5 are heated by the vaporizer heater 48, and the vaporizer 5 is quickly raised to the vaporization temperature of kerosene as fuel.

  Then, when the temperature of the vaporizer 5 reaches a predetermined value by the temperature detector 53, the control circuit operates a solenoid (not shown) for opening and closing the pump 4 and the nozzle 34, and the vaporized gas is delivered from the nozzle 34 to the burner unit 7. Let spray. At the same time, an ignition device (not shown) is operated and ignited by the ignition device, whereby the combustion operation is started.

  Thus, since the outer peripheral part of the radial pleat part 29a of the wick 14 installed in the vaporizing chamber 13 can contact the inner wall of the vaporizing chamber 13 satisfactorily, the heat source outside the vaporizer 5, that is, the vaporization The heat supplied from the heater 48 and the heat receiving fins 24 is efficiently transmitted to the central portion of the wick 14 through the radial pleat portion 29a of the wick 14 through the shortest path, and kerosene is actively vaporized also in the central portion of the vaporizing chamber 13. I can do it.

  Further, the wick 14 has a tapered shape, and the hollow cylindrical vaporization chamber 13 formed in the vaporizer 5 can be easily inserted when the wick 14 is inserted by adopting the same tapered shape. Can do.

  Further, by inserting the wick 14 into the vaporizing chamber 13 and pressing it strongly to press the outer peripheral portion of the fold portion 29a of the wick 14 against the inner wall of the vaporizing chamber 13, even if heating and cooling are repeated over a long period of time, Sag deformation can be prevented and the wick 14 and the inner wall of the vaporizing chamber 13 are sufficiently well in contact with each other even when used for a long period of time, so that heat is not easily transmitted from the inner wall of the vaporizing chamber to the wick. It is possible to vaporize fuel uniformly and perform stable gasification of fuel.

  Further, since the center of the wick 14 can be efficiently heated, the vaporized fuel does not re-liquefy by cooling when passing through the center of the wick 14, and tar generation is prevented. The nozzle 34 is not clogged.

It is a plane sectional view of the kerosene vaporizer which shows one example of the present invention. It is the sectional view on the AA line of FIG. Similarly, it is a perspective view of a kerosene vaporizer. Similarly, it is a perspective view explaining a fold-fold body which is a wick material. Similarly, it is a perspective view of a wick. It is a longitudinal cross-sectional view of the combustion apparatus explaining a present Example and a prior art example. It is a cross-sectional view of a kerosene vaporizer for explaining a conventional example. It is the sectional view on the AA line of FIG.

Explanation of symbols

5 Vaporizer 6 Fuel Pipe 13 Vaporization Chamber 14 Wick 29 Folded Folded Body 29a Folded Portion 30 Hollow Portion 34 Nozzle

Claims (1)

There are a vaporizer (5), a hollow cylindrical vaporization chamber (13) formed in the vaporizer (5), and a fold-fold body (29) formed of a thin plate material having a relatively good thermal conductivity. The hollow part (30) was left in the center part, and each pleat part (29a) was formed in a rod shape so as to be radial, and its outer peripheral part was installed in contact with the inner wall of the vaporization chamber (13). A vaporization wick (14) and a nozzle (5) provided in the vaporizer (5) on one end side in the longitudinal direction of the vaporization chamber (13) in order to eject the fuel gas vaporized in the vaporization chamber (13) 34), a burner portion (7) for receiving and burning fuel gas ejected from the nozzle (34), a cap (32) attached to close the other end of the vaporizing chamber (13), and the cap A lamp comprising a fuel pipe (6) connected to (32) In vaporizer, kerosene vaporizer, characterized in that said wick (14) and the shape of the vaporizing chamber (13) nozzle (34) side is a tapered shape so that the tapered.

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