JPH11201413A - Kerosene vaporizer - Google Patents

Abstract

(57) [Problem] To provide a kerosene vaporizer that prevents tar clogging at an oil inflow port, which is a connection portion between an oil supply pipe and a carburetor body, and suppresses the formation and adhesion of tar at an upper part of a wick. provide. For this purpose, in a kerosene vaporizer in which a heat receiving rod is provided at a position between a cap and a nozzle of a vaporizer body to recover combustion heat by being exposed to a combustion flame of a burner, the cap 3 is made of stainless steel having poor heat conductivity. The cap 3 is provided with an oil inlet 6 through which kerosene flows, and one or more wicks 5 are provided between the carburetor body 1 and the heating element 4. The opening 14 was formed, and the opening 14 above the wick 5 was communicated with the space inside the cap 3 and the upper opening 14 was communicated with the space inside the nozzle 7. As a result, the generation of tar at the oil inlet and the upper portion of the wick was suppressed, and the durability of the vaporizer against tar clogging was further improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vaporizer for vaporizing kerosene by combustion heat recovered through a heat receiving rod in addition to heat generated by a heating element.

[0002]

2. Description of the Related Art FIG. 7 is a sectional view of a conventional kerosene vaporizer, in which 101 is a hollow cylindrical vaporizer body, 201 is a vaporizer chamber formed in the vaporizer body 101, Reference numeral 301 denotes a cap for closing one end of the vaporizer body 101, reference numeral 401 denotes a heating element inserted into and fixed to the vaporization chamber 201 of the vaporizer body 101 from the end opposite to the cap 301, and reference numeral 501 denotes the vaporizer body 101.
The wick is inserted into the vaporization chamber 201 from the cap 301 side to promote diffusion and vaporization of kerosene. Reference numeral 601 denotes an oil inlet into which kerosene from the pump flows.
Numeral 701 denotes a nozzle from which vaporized kerosene is jetted, and numeral 801 denotes a nozzle which is heated by being exposed to a combustion flame of a burner and recovers heat (recovery heat).
Is transmitted to the vaporizer body 101. Reference numeral 901 denotes a vaporizer temperature detecting element for detecting the temperature of the vaporizer body 101.

In this kerosene vaporizer, when an operation for starting operation is performed, the heating element 401 is controlled based on information from the temperature detecting element 901 to raise the vaporizer body 101 to a predetermined temperature. When the temperature of the vaporizer body 101 reaches a predetermined value, a pump (not shown) starts operating and kerosene is fed from the oil inlet 601 to the vaporizing chamber 201, and at the same time, a solenoid (not shown) operates. The cleaning rod (not shown) moves, and the nozzle 701 is opened. As a result, the generated kerosene gas is supplied from the nozzle 701 to a burner (not shown), where combustion takes place.

During the combustion, the heat receiving rod 801 is exposed to the combustion flame of the burner, and the heat received by the heat receiving rod 8 from the flame, that is, the recovered heat, is supplied to the vaporizer body 101.
After the temperature of the vaporizer body rises above the predetermined temperature,
The operation of the heating element 401 is stopped, the temperature of the vaporizer body 101 is maintained at a predetermined value or more by the heat from the heat receiving rod 801, and the vaporization of kerosene is continued.

[0005]

However, in the above-described conventional vaporizer, since the heat receiving rod 901 for recovering heat from the combustion flame is provided near the oil inlet 601, the vicinity of the oil inlet 601 is provided. The temperature easily rises, and sometimes a phenomenon occurs in which the kerosene discharged from the oil inlet 601 evaporates instantaneously, causing pulsation combustion or promoting the deterioration of the kerosene. Sometimes clogged with tar.

Conventionally, in order to solve this problem, for example, as disclosed in Japanese Utility Model Application Laid-Open No. 60-81437, the cross-sectional area of the heat conduction path between the carburetor body and the oil supply pipe at the oil supply pipe mounting portion is reduced. , Or 3-11262
As disclosed in Japanese Patent Application Publication No. 2 (1993) -207, an oil feed pipe is connected to a carburetor body through a stainless steel joint having low thermal conductivity, but this has not been a fundamental solution.

[0007] Various improvements to the wick have been proposed, such as invented in Japanese Utility Model Application Laid-Open Nos. 60-165631 and 3-56023, all of which are easy to replace the wick. And the effect of preventing tar clogging was not so significant.

[0008]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and a heating element is inserted from one end of a vaporizer body having a hollow vaporization chamber formed therein, and a wick is inserted from the other end. And closing it with a cap, and disposing a nozzle for ejecting kerosene vaporized gas generated in the vaporization chamber and a temperature detecting element for detecting the temperature of the vaporizer body on the side of the heating element insertion side of the vaporizer body, respectively.
In a kerosene vaporizer provided with a heat receiving rod for recovering combustion heat by being exposed to a combustion flame of a burner in a position between a cap and a nozzle of a vaporizer body, the cap is made of a material having poor heat conduction, and the cap is made of Was opened, one or more wicks were provided between the carburetor body and the heating element, and the upper part of the wick was made an open part to constitute a kerosene vaporizer.

Also, a kerosene vaporizer is constructed by connecting the upper open portion of the wick to the inner space of the cap and connecting the upper open portion of the wick to the inner space of the nozzle.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention has the above-mentioned structure, and the combustion heat recovered by the heat receiving rod reaches the oil inlet from the carburetor body through the cap with poor heat conduction, and the heat conduction is poor. Utilizing the properties, the rise in the temperature of the oil inlet is effectively suppressed, and kerosene is not vaporized at the oil inlet. As a result, the tarification of kerosene at the oil inlet is effectively suppressed.

The oil that has flowed into the high-temperature wick and evaporates smoothly passes through the space connected to the nozzle above the wick and reaches the nozzle. Evaporate.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS.

In these figures, 1 is a hollow cylindrical vaporizer body, 2 is a vaporization chamber formed in the vaporizer body 1 and 3 is a stainless steel cap for closing one end of the vaporizer body 1. Thus, as shown in FIG. 2, two stages of drawing are performed. Reference numeral 4 denotes a heating element inserted and fixed from the other end into the vaporization chamber 2 in the vaporizer body 1.
Is a wick for promoting the diffusion and vaporization of kerosene in the vaporizer body 1. The wick 5 may be, for example, a copper mesh and a stainless steel mesh as shown in FIG. 3 or a foam metal having a relatively good thermal conductivity as shown in FIG. Used.

Reference numeral 6 denotes an oil inlet through which kerosene flows from the pump, and is provided on the small diameter side of the stainless steel cap 3 described above. Reference numeral 7 denotes a nozzle from which vaporized kerosene is ejected, and reference numeral 8 denotes a nozzle provided between the nozzle 7 of the vaporizer body 1 and the cap 3 and receives heat by being exposed to a combustion flame and recovers the heat (recovered heat). Is a vaporizer temperature detecting element for detecting the temperature of the vaporizer body 1. Reference numeral 10 denotes a cleaning rod provided in the nozzle 7, reference numeral 11 denotes a solenoid for driving the cleaning rod 10 in the left-right direction of FIG. 1, reference numeral 12 denotes a pump for supplying kerosene to the oil inlet 6, and reference numeral 13 denotes ejection from the nozzle 7. It is a burner that burns kerosene gas.

The wick 5 is open at the top, and this opening communicates with the space inside the stainless steel cap 3 and also communicates with the space inside the nozzle 7.

Next, the operation of the embodiment constructed as described above will be described.

When the operation for starting operation is performed, the heating element 4 is controlled based on the information of the temperature detecting element 9 to raise the vaporizer body 1 to a predetermined temperature. When the temperature of the vaporizer body reaches a predetermined value, the pump 12 operates and the kerosene is vaporized.
At the same time, the solenoid 11 operates to move the cleaning rod 10, and the nozzle 7 is opened. As a result, the generated kerosene gas is supplied from the nozzle 7 to the burner 13, where combustion takes place.

The cleaning rod 10 opening the nozzle 7 during the burning operation is closed so as to close it when the burning operation is stopped.
Driven by the solenoid 11.

During the combustion, the heat receiving rod 8 is exposed to the combustion flame, and the heat receiving rod 8 receives heat from the flame, that is, the recovered heat is supplied to the carburetor body 1, and the temperature of the carburetor body becomes a predetermined temperature. After the rise, the operation of the heating element 4 is stopped, the temperature of the vaporizer body 1 is maintained at a predetermined temperature or higher by the heat from the heat receiving rod 8, and the vaporization of kerosene can be continued.

In this embodiment, the oil inlet 6
However, the heat transmitted from the heat receiving rod 8 to the cap 3 via the carburetor body 1 is less likely to reach the oil inflow port 6 because the heat transfer rod 8 is provided at the small diameter portion of the thermally conductive stainless steel cap 3 which is narrowed down by two steps. As a result, the oil inlet 6 does not become abnormally hot, and kerosene does not instantaneously evaporate at the oil inlet 6.

The oil that has flowed into the high-temperature wick 5 and evaporates is discharged from the open portion 1 connected to the nozzle above the wick 5.
4 smoothly to the nozzle 7 where the wick 5
, And no evaporation of tar occurred, and the evaporation could be stably performed for a long period of time.

At the same time, since the temperature of the oil inlet 6 is lowered, kerosene is less likely to be tarred, and the life of the vaporizer can be greatly extended.

[0023]

As described above, according to the present invention, since the cap is made of a material having poor heat conductivity, and the oil inlet is opened, the oil is recovered by the heat receiving rod and passed from the vaporizer body through the cap to the oil inlet. The amount of heat reaching is greatly restricted, and the temperature of the oil inlet does not rise abnormally. In addition, since the upper portion of the wick is open, even when defective kerosene is used, stable evaporation that hardly causes tar clogging is performed, and an excellent vaporizer having a long life can be provided.

[Brief description of the drawings]

FIG. 1 is a schematic partial cross-sectional view of a combustor using an embodiment of the present invention.

FIG. 2 is a cross-sectional view of one embodiment of the present invention.

FIG. 3 is a sectional view of one embodiment of the present invention.

FIG. 4 is a sectional view of one embodiment of the present invention.

FIG. 5 is a sectional view of one embodiment of the present invention.

FIG. 6 is a perspective view of one embodiment of the present invention.

FIG. 7 is a sectional view of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vaporizer body 2 Vaporization chamber 3 Cap 4 Heating element 5 Wick 6 Oil inflow port 7 Nozzle 8 Heat receiving rod 9 Temperature detection element 14 Open part at the top of wick

Claims (2)

[Claims] 1. A heating element is inserted from one end of a vaporizer body having a hollow vaporization chamber formed therein, and a wick is inserted from the other end and closed with a cap. A nozzle that emits kerosene vaporized gas generated in the chamber and a temperature detecting element that detects the temperature of the carburetor body are provided, respectively, and the position between the cap and the nozzle of the carburetor body is exposed to the burner combustion flame. In a kerosene vaporizer provided with a heat receiving rod for recovering combustion heat, the cap (3) is made of a material having poor heat conductivity, and an oil inlet (6) through which kerosene flows into the cap.
And one or more wicks (5) are provided between the vaporizer body (1) and the heating element (4), and an upper portion of the wick is an opening (20). Kerosene vaporizer. 2. An upper opening (2) of said wick (5).
2) The interior space of the cap (3) and the inner space of the nozzle (7) are communicated with the upper opening (20) of the wick (5) and the interior space of the nozzle (7). Kerosene vaporizer.