JPH11248112A - Kerosene vaporizer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a kerosene vaporizer which enables a uniform vaporization on the entire region of a wick without causing a tar clogging in an oil inlet opening of a carburetor body. SOLUTION: A kerosene vaporizer is constructed such that a heat receiving bar is disposed at a position between a cap and a nozzle of a carburetor body while being exposed to the combustion flame of the burner for recovering combustion heat. In such a kerosene vaporizer, the cap 3 is made of a stainless steel which has poor thermal conductivity, and an oil inlet opening 6 for introducing kerosene is opened at the cap 3, a wick 5 made of a foamed metal which has an excellent kerosene suction ability is disposed between the carburetor body 1 and a heat generating body 4 and hence, the supplied kerosene is sucked into the entire region of the wick 5 without being dwelled at the bottom of the inside of the carburetor, so that the moderate vaporization is performed at the entire region of the wick. Accordingly, the generation of tar at the oil inlet opening and the wick can be restricted so that the durability of the carburetor against clogging by tar is further enhanced.

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. 8 is a sectional view of a conventional kerosene vaporizer, in which 101 is a hollow cylindrical vaporizer body, 201 is a vaporization 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 Laid-Open Publication 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. 3-1126
As disclosed in Japanese Patent Publication No. 22, the oil supply pipe is connected to the vaporizer body via 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 at 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 kerosene. Was opened, and a wick made of foamed metal was provided between the vaporizer body and the heating element to constitute a kerosene vaporizer.

At this time, a wick made of foamed metal is formed in a tubular shape, and a heating element is covered with a tubular body made of a material having poor heat conductivity, and a wick made of foamed metal is covered on the outside. did.

[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 temperature rise at the oil inlet is effectively suppressed, and kerosene is not vaporized at the oil inlet. As a result, tarring of kerosene at the oil inlet is effectively suppressed.

Further, the wick is made of foamed metal having excellent kerosene wicking properties, so that the kerosene supplied from the bottom of the wick can be efficiently dispersed throughout the high-temperature wick without remaining at the bottom of the wick. , And efficiently evaporated. Thus, the vaporized gas was allowed to flow smoothly into the nozzle in the upper part of the vaporizing chamber, so that tar adhesion on the wick was less likely to occur and evaporation was performed stably for a long period of time.

Further, a wick made of, for example, stainless steel having poor heat conductivity is placed around the heating element, and the above-mentioned foamed metal wick is further placed on the outside thereof, so that the temperature distribution of the wick is made uniform. Kerosene evaporation was performed well throughout the wick.

[0013]

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. As shown in FIG. 3, the wick 5 is made of a foamed metal, for example, having a relatively good thermal conductivity, an air content of about 90%, and an excellent wicking property for kerosene. I have.

Reference numeral 6 denotes an oil inlet through which kerosene flows from the pump, and is provided on the small-diameter portion 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.

When a stainless steel (SUS) steel pipe having relatively low thermal conductivity is put on the outside of the heating element 4, the surface temperature distribution of the heating element 4 is satisfactorily leveled and the temperature distribution of the wick 5 is made more uniform. Vaporization chamber 2
The arrangement of the heating element 4, the stainless steel pipe, and the wick 5 in the inside may be as shown in FIG. This figure 4
14 is a stainless steel pipe.

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 the 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 it is opened at the small diameter portion of the stainless steel cap 3 having poor heat conductivity and 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. As a result, the oil inlet 6
Kerosene is less likely to be tarred in the section, and the life of the vaporizer can be greatly extended.

A wick 5 having a high temperature and a uniform temperature
The oil that has flowed into the inside of the wick does not stay at the bottom of the wick, is well dispersed throughout the wick 5, and evaporates throughout the wick without evaporating in the uneven portion. As a result, the tarification of kerosene is even less likely to occur, and the life of the vaporizer is extended.

At this time, since a stainless steel pipe having relatively poor heat conductivity is covered on the outside of the high-temperature heating element 4, the temperature distribution of the wick 5 can be further flattened, and the wick 5 Local high temperature is prevented, and deterioration of vaporization ability due to tar clogging can be prevented at an extremely high level. As a result, a vaporizer that exhibited stable performance over a long period of time could be obtained.

[0024]

As described above, according to the present invention, the cap is made of a material having poor heat conductivity, and is processed into a two-stage throttle, and the oil inlet is opened in a small diameter portion of the cap. The amount of heat that reaches the oil inlet through the cap from the carburetor body will be greatly limited, and the temperature of the oil inlet will not rise abnormally, and kerosene at the oil inlet will not be heated. Deterioration can be effectively prevented.

Further, since the wick is made of a foamed metal having an excellent wicking property for kerosene, the wick is efficiently vaporized over the entire area of the wick. Is less likely to tar. As a result, the life of the vaporizer was greatly extended.

Further, since the cylindrical body made of a material having poor heat conductivity is covered on the outside of the heating element and the wick made of foamed metal is covered on the outside thereof, the temperature distribution of the wick is further uniformed. This allowed for gentle vaporization throughout the wick. Thereby,
Deterioration of the supplied kerosene was prevented very well, and a vaporizer capable of performing stable vaporization over a long period of time could be obtained.

[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 perspective view of a wick used in one embodiment of the present invention.

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

FIG. 5 is a perspective view of a wick used in 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 inlet 7 Nozzle 8 Heat receiving rod 9 Temperature detecting element 14 Stainless steel pipe

Claims (3)

[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 a wick (5) made of foam metal is provided between the vaporizer body (1) and the heating element (4). 2. The kerosene vaporizer according to claim 1, wherein the foamed metal wick (5) is formed so as to cover the outside of the heating element (4) in a cylindrical shape. . 3. The heating element (4) inserted from one end of the carburetor body (1) is covered with a tubular body made of a material having poor heat conductivity, and the outside of the tubular body is made of a foamed metal. The kerosene vaporizer according to claim 2, characterized in that the wick (5) is covered.