MXPA98005117A - Combustion wick for liquid fuel combustion appliance - Google Patents

Abstract

A combustion appliance which is provided with a combustion wick, which makes use of capillarity to suck up and burn a liquid fuel. With the combustion appliance, flame length conforming to usage of the appliance is obtained and a change in a residual fuel quantity causes less change in a supply of fuel and no change in flame length. The combustion wick (6) comprises a suction portion (61) for sucking up a liquid fuel and a heat-resisting combustion portion (62), which are formed from different materials and connected to each other.

Description

COMBUSTION OUTLET FOR LIQUID FUEL COMBUSTION APPARATUS DESCRIPTION OF THE INVENTION This invention relates to a combustion wick for sucking a liquid fuel and burning it in a combustion apparatus for a liquid fuel, such as a lighter using an alcohol fuel. or similar. This invention relates in particular to the constitution of a combustion wick to obtain a desired combustion state in combustion apparatus, such as lighters for smoking requirements, other types of lighters, torches, flashlights and other types of lighting devices, in which liquid fuels, such as alcohols, benzine type hydrocarbons or petroleum type hydrocarbons. Usually, they have been used up to now as fuel in combustion devices, such as cigarette lighters, as well as other types of lighters such as torches and lighting devices, alcohol fuels, such as ethyl alcohol, benzene fuels, petrol type of petroleum, or liquefied gas fuels, such as butane gas or propane gas. The performance, handling convenience levels and design structures of combustion appliances vary according to the kinds of fuel used, and fuels have their own characteristics. For example, in cases where liquefied gas fuels are used as liquid fuels, because liquefied gas fuels have a high gas pressure at temperatures that enter the scale, in which the liquid gas apparatus is used. combustion, the container for storing fuels must have a pressure-resistant structure. Also, the length of the flame varies according to variations in gas pressure. In particular, liquefied gas fuels have the characteristic that their gas pressures vary markedly in logarithmic form with respect to temperatures, and therefore problems occur in that the length of the flame changes markedly, depending on the the temperatures. In order to reduce the change in the length of the flame, a preventive measure of special design must be adopted to effect the temperature compensation for a fuel feeder mechanism of the combustion apparatus. Therefore, the structure can not be simple and the cost can not be kept low. As for liquid fuels, such as alcohol fuels, they are liquid at normal temperatures and have comparatively low vapor pressures.

Therefore, the section that stores the fuel does not need to be a pressure resistant structure. Consequently, the structure of the combustion apparatus can be simple and the cost can be kept comparatively low. In combustion apparatuses for liquid fuels, up to now, they have been used as means for feeding the liquid fuel from the fuel storage section to the burning section, a combustion wick which sucks the liquid fuel with the liquid fuel. capillarity through the open pores or through tiny spaces formed between thin fibers between a bundle of fibers and through the use of the surface tension of the liquid fuel and allowing liquid fuel to burn at an upper end portion of the wick. Specifically, in the combustion wick, the liquid fuel is sucked by using a wick similar to a rope formed by twisting the fibers, a bundle of fiberglass, a wick by binding the glass fibers with cotton threads and interweaving Thin metal wires to prevent the beam from coming loose or something similar. The lower end portion of the combustion wick has the functions of sucking the liquid fuel, and the sucked fuel is burned in the upper end portion of the wick.

However, with the combustion wick, in which the portion sucking the fuel and the burner portion are made of the same material and formed as an integral body, both the requirement for the performance of sucking the liquid fuel from the Fuel storage, as the requirement for combustion performance can not be sufficiently satisfied. For example, a combustion wick may be used in which the suction portion is made of the same material as the heat resistant material of the burner portion and the two portions are formed as an integral body. In addition, the lower portion of the combustion wick can be inserted into the fuel storage section that has been injected with the liquid fuel, and the liquid fuel can ignite and burn in the upper portion of the combustion wick. In such cases, when the amount of fuel in the fuel storage section is reduced due to the use of fuel for burning in the burner portion and the distance, over which the fuel must be sucked from the fuel storage section to the Burning portion is increased, the rate of suction of fuel through the suction portion is reduced, and the rate of fuel feeding to the burning portion is also reduced.

As a result, the length of the flame is shortened. However, if the thickness of the combustion wick is set to be long so that the suction performance of the portion is suctioned it can be improved, the flame length will increase or the thickness of the flame will be enlarged. Therefore the combustion wick presents problems in when the combustion flame having characteristics suitable for the application of the combustion apparatus, can not be obtained. In cases where the combustion wick is made of a material that has good suction performance but has a low heat resistance, there are problems in that the adverse effects of heat during combustion occur rapidly on the characteristics of the combustion. combustion wick. As a result, the length of the flame varies and good durability can not be obtained. Conversely with a combustion wick having good combustion characteristics, but having an insufficient suction performance as described above, a stable flame length can not be obtained. Furthermore, in the cases of smoking lighters and the like, it is often desired that the combustion flame becomes small or that it may be extinguished after combustion has lasted for a predetermined period. In the cases in which a combustion wick having such characteristics is to be constructed, it is difficult for combustion wick, in which the suction portion and the burning portion are made of the same material and formed as a body integral, satisfies both requirements for the fuel suction characteristics and the requirement for combustion characteristics. In view of the aforementioned circumstances, the object of the present invention is to provide a combustion wick in a combustion apparatus for a liquid fuel, the combustion wick of which has combustion characteristics suitable for the application of the combustion apparatus. A combustion wick in a combustion apparatus for a liquid fuel according to the present invention, which solves the problems described above, is characterized by making a suction section for sucking a liquid fuel and a heat-resistant burning section of different materials and that connects the suction section and the burned section one with the other. During combustion of the liquid fuel with the combustion wick according to the present invention, the liquid fuel, which is stored in a fuel storage section, is sucked through the suction section and is thus fed to the fuel section. Burned.

The suction section is constituted of a material having the suction characteristics in such a way that, even if the amount of the fuel remaining in the fuel storage section varies, the rate at which the fuel is fed to the burning section can be constant. The burning section is constituted by a heat-resistant material that is not lost due to combustion. Also, the burning section is formed so that a required flame length and a required flame shape can be obtained. With the combination of the suction section and the burn section, combustion can be obtained with a stable flame length and good durability. In particular, in cases where the rate of fuel feeding through the suction section is set higher than the rate of fuel burning in the burning section, continuous combustion can be reliably carried out. The present invention also provides a combustion wick in a combustion apparatus for a liquid fuel, characterized in that a suction section for sucking a liquid fuel and a heat-resistant burning section are made of different materials and connected one to the other. another, and set a regime, to which the liquid fuel is fed through the suction section to the burning section, to a value lower than a value of burning fuel in the burning section. With the combustion wick described above in accordance with the present invention, the rate of fuel feeding through the suction section is set to be less than the rate of fuel burning in the burning section. Therefore, when the liquid fuel, which has been sucked through the suction section into the vicinity of the burning section in the off state, ignites and burns for a predetermined period of time, there is insufficient fuel in the burning section due to the low fuel feed rate through the suction section. As a result, the length of the flame shortens or the fire goes out. Therefore, the combustion wick has characteristics such that combustion can be effected for only a predetermined period. As a result, the combustion wick can be used as a combustion wick in combustion appliances, such as smoking lighters. The burning section should preferably be made of heat resistant fibers, such as glass fibers, ceramic fibers or carbon fibers, or preferably it should be formed of a porous glass material having open cells or a porous ceramic material sinter that has open cells. The suction section is preferably made of a sintered material obtained by sintering polyethylene powder, or something similar, or preferably it must be made of a fiber material, which has been formed into a bundle or which has been formed to a predetermined shape by the use of an adhesive agent. With the materials listed above, the burn section, which has a heat resistance and is capable of effecting stable combustion, can be obtained. In addition, the suction section exhibiting little fluctuation in the fuel feed rate with respect to a change in the amount of residual fuel can be obtained. Also, from the point of view of the production process, or the like, the suction section and the burn section preferably should be combined with one another by a cylindrical connector member located around an outer periphery of a region, in which one end of the suction section and one burning end connect with each other. Furthermore, in order to achieve a stable combustion, preferably a fuel tank should be located in the vicinity of a position, in which the suction section and the burning section combine with each other. The fuel liquid may be a fuel-type alcohol such as a fuel containing, as a major constituent, a lower monohydric alcohol selected from the group consisting of methyl alcohol, ethyl alcohol, and propyl alcohol, and containing a saturated hydrocarbon, such like hexane or heptane, to give color to the flame. Alternatively, a hydrocarbon of the benzine type or a hydrocarbon of the petroleum type or the like can be used as the liquid fuel. With the combustion wick according to the present invention, the suction section and the burning section are made of different materials and are connected to each other. Therefore, the combustion wick having combustion efficiency and suction performance, which are suitable for the characteristics required for each of the combustion apparatuses, can be formed easily. For example, the combustion wick may be formed to be suitable for continuous combustion for a prolonged period, or in such a way that it may be appropriate for an appropriate combustion mode in which the flame length becomes small or the Fire is extinguished after combustion has continued for a predetermined period of time. Specifically, with the combustion wick according to the present invention, the combustion wick is divided into the burning section, which is located at the upper end of the wick, and the suction section that sucks the fuel and feeds it into the combustion chamber. burned section. The suction section and the burning section are made of different materials and are connected to each other. Therefore, the fuel can be fed to the burning section, so that a necessary flame shape and a necessary flame length can be formed. In addition, the fuel can be fed to the burning section, so that the combustion of the combustion flame can be continued reliably, or in such a way that the combustion flame can only occur for a predetermined period of time. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic sectional view showing an example of a combustion apparatus for a liquid fuel, in which a first mode of the combustion wick according to the present invention is employed, and which takes the shape of a lighter. Figure 2 is a schematic sectional view showing a second embodiment of the combustion wick according to the present invention. Figures 3A and 3B are views in schematic sections showing two types of wicks in a third mode of the combustion wick according to the present invention.

Figure 4 is a graph showing the results of a combustion test performed in the experimental example 1 of the use of the lighter shown in Figure 1. Figure 5 is a graph showing the results of a combustion test carried out by the use of a combustion wick of a comparative example with respect to experimental example 1, and Figure 6 is a graph showing the results of a combustion test carried out in experimental example 2 when incorporating the third mode of combustion wick in the lighter shown in the Figure 1. The modes of combustion wick according to the present invention will be described hereinafter with reference to the accompanying drawings. < First Mode > Figure 1 shows a schematic sectional structure of an example of a combustion apparatus in which a first mode of the combustion wick according to the present invention is used and which takes the form of a lighter. A combustion wick 6 comprises a burning section 61 in an upper part and a suction part 62 in a lower part, which are made of different materials and as separate portions. The burning section 61 and the suction section 62 are combined with one another by a connector member 63, so that a lower end of the burning section 61 and an upper end of the suction section 62 may be in contact with one another. with the other. The burning section 61 is formed by making a bundle of fiberglass strands, bending in its middle part, inserting the folded portion of the bundle into a cylindrical connector member 63 made of a metal, pushing a wedge-shaped securing member 64 into the space, which is defined by the bent portion of the bundle that has been inserted into the connector member 63, and thereby securing the folded portion of the bundle. The suction section 62 is formed into a rod-like shape having a head 62a of increased diameter sintering polyethylene powder into a mold. The head 62a is inserted into a lower portion of the connector member 63 and is brought into contact with the lower end of the burning section 61. In this state, the lower end portion of the connector member 63 is filled, and the burn section 61 and the suction section 62 are thus combined with each other. The combustion wick 6 is constituted in this way. Alternatively, the lower end portion of the connector member 63 may be pre-shrunk to a small diameter. The limbs the suction section 62 can then be inserted into the connector member 63, and the head b2a the suction section 62 can be coupled with the shrunk portion of the connector member 63. Next, the bent portion of the burning portion 61 can be inserted into the connector member 63, and the holding member 64 can be pushed into the space defined by the bent portion of the burning section 61. In this form, the burning section 61 and the suction section 62 can ensure one another so that they can be in contact with each other. With the combustion wick 6 described above, the fuel burning rate, the shape of the flame and the length of the flame are fixed by the thickness, number and length of the glass fibers and constitute the section 61 of burning . As for the suction section 62, the state of formation of the internal pores depends on the thickness of the suction section 62, the particle diameter of the sintered polyethylene powder, the sintering density, and the like. The suction and fuel feed characteristics of the suction section 62 are fixed by these factors. The head 62a of the suction section 62 has the increased diameter and a large volume and constitutes a fuel tank for holding the liquid fuel. The fuel tank serves to stabilize combustion.

For example, in the cases in which the combustion wick 6 is that incorporated in the smoking lighters, the burning section 61 is made of glass fibers having a thickness of 6 μm, a fiber density (i.e. , a weight per unit area) of 150mg / cmJ, and a length of 20mm, a beam of glass fibers is bent in its middle part and in this way a beam having an external diameter of 3mm and a length of 10. The folded bundle is then inserted into the connector member 63, so that the folded bundle can be projected to a length of 5mm from the upper end of the connector member 63. The suction section 62 is formed by introducing the polyethylene powder, which is a mixture of particles that have mesh sizes from more than 70 to more than 200 and has an average particle size of 140 mesh, in a mold, and sintering the polyethylene powder at 170 ° C for 10 minutes. of suction is formed, in such a way that the head 62a may have an external diameter of 4.2mm and a length of 3mm, and the extremity under the head 62a may have an external diameter of 4mm. and a length of 37mm. The combustion wick 6 having the configuration described above is incorporated into a lighter 1 which serves as a combustion apparatus. The suction section 62 is grafted into a fuel storage section 5. The suction section 62 sucks the liquid fuel from the fuel storage section b and feeds it into the combustion section 61. The sucked liquid fuel is ignited in the upper end portion of the burning section 61 by a lighter member 10 and burned. In the cases in which the combustion is carried out continuously, the combustion wick 6 is fixed to have the necessary characteristics so that the fuel feeding regime through the suction section 62 can be higher than the burning regime. of fuel in section 61 of burning. In this form, the combustion in the burning section 61 can be continuous in such a way that the shape and length of the flame can not change (refer to experimental example 1, which will be described later). As described in the above, the burning section 61 and the suction section 62 are made of different materials. Therefore, the burn section 61 can be designed in accordance with a desired flame size and a desired flame shape. In addition, the suction section 62 can be designed so that the suction performance can be obtained according to the fuel burn regime in the burning section 61. Instead of the fiberglass, the burning section 61 of the combustion wick 6 described above can be made of ceramic fibers or carbon fibers as well as the heat resistant lbs. By way of example, the fiber of vijdi io, the ceramic fibers having a thickness of 2.8μm can be formed from a starting material, which mainly contains alumina and silica, and a small amount of an organic binder can be added to the ceramic fibers . The ceramic fibers thus obtained can be formed to a predetermined shape, such that the packing density can be 200 mg / cm 3. The lighter 1 has the structure described below. Specifically, the lighter 1 is provided with a tank 2 in the form of a box with a bottom part. A fiber material 3 (batts) is inserted into tank 2. A cover 4 is secured to the top of the tank. In this form, the fuel storage section 5 for storing the liquid fuel is formed. By way of example, tank 2 is composed of a molded product of polypropylene and has an internal volume of 5cm3. As the fiber material 3, the polypropylene fibers having a thickness of 1 to 2 denier are pushed to a density of O.lg / cm3 inside the tank 2. In addition, 4cc. of the liquid fuel are injected into the tank 2, the fiber material 3 is thus impregnated with the liquid fuel and the liquid fuel is stored with it in the tank 2. As a liquid fuel a liquid fuel is used which contains "I by weight ethyl alcohol and 't <; in weight of n-hexane. The combustion wick 6 is inserted vertically through a center portion of the upper cover 4 and into the tank 2. A portion of the connector member 63 is secured to the upper cover 4. A lower end portion of the suction section 62 of the combustion wick 6 is brought into contact with the fiber material 3, which is contained in the tank 2. Through the use of capillarity, the suction section 62 sucks the liquid fuel , which is contained in the fiber material 3. The fuel so sucked is ignited in the combustion section 6 of the combustion wick 6 and burned with a flame that is being produced. The projection length of the burn section 61 from the connector member 63 is adjusted to be approximately 5mm. so that the length of the flame can be 30 mm. The lighter member 10 is fixed to the upper cover 4 so that the lighter member 10 can be facing the upper end portion of the burning section 61 of the burning wick 6. The lighter member 10 comprises a bracket 11 which is secured to the upper cover 4, and an ignition stone 12, which is inserted in the bracket 11 in such a way that it can move vertically. The lighter member 10 also comprises a rotatable file 13 which is located at the superteau end of the bracket 11, and a stone pushing spring 14 which pushes the ignition stone 12 in such a way that the extension of the stone 12 of ignition can be pushed against the circumferential surface of the file 13 rotatable by the pushing force of the stone thrust spring 14. When the rotatable file 13 is rotated, sparks are thrown from the ignition stone 12 into the combustion wick 6. An openable cover 16 covers the region above the combustion wick 6 and the lighter member 10. The lid 16 is rotatably supported for rotation by a pin 17 on an end portion of the upper surface of the upper cover 4. The portion in which the tank 2 or the top cover 4 comes into contact with the lid 16 is provided with a sealing material 18 such that the portion can be hermetically sealed and prevents the liquid fuel from evaporating. < Second Modality > As illustrated in Figure 2, a combustion wick 7 is provided with a burnout section 71, which is composed of a sintered material. The combustion wick 7 comprises the burner section 71 in an upper part - and a suction section 72 of a lower part, which are made of different materials and as separate portions. The burn section 71 and the suction section 72 are combined with one another by a connecting member 73, so that the lower end of the burning section 11 and the upper end of the suction section 72 can be brought into contact with each other. in contact with one another The burning section 71 is made of a sintered porous glass material or a sintered porous ceramic material and contains open cells (capillary paths) therein. The lower end portion of the burning portion 71 is formed as a suction portion 71a, which has a step-like portion and is thicker than the upper end portion than the burning section 71. The suction section 72 is made of a fiber material, which has been formed to a bar-like shape by the use of an adhesive agent, a fiber material that has been formed into a bundle without the use of an adhesive agent , or a sintered material, which is obtained by sintering the polyethylene powder described above. The upper end portion of the suction section 72 is formed as a head 72a, which has a step-like portion and is thicker than the lower end portion of the suction section 72. The holding portion 71a of the burning section 71 and the head 72a of the suction section 72 are connected to each other by filling the connecting member 73, and the combustion wick 7 is thereby formed as an integral body. In addition, the interior of the portion of the connector member 73 has an increased volume that serves as a fuel tank to retain the liquid fuel. In order for the combustion wick 7 to occur, an extirpable portion of the connector member 73 is first shrunk. The suction section 72 (or the burning section 71) is then inserted into the connector member 73, and its thick end portion engages the sintered porous ceramic material. Then, the thick end portion of the burn section 71 (or the suction section 72) is inserted on the opposite side of the connector member 73, and the other end portion of the connector member 73 is filled. In this form, the burn section 71 and the suction section 72 connect with each other. <; Third Modality > This modality is conformed as illustrated in the Figure 3A or Figure 3B, so that the flame can be made small or the fire can be extinguished after combustion has continued for a predetermined period. * Figure 3A illustrates a combustion wick 8 formed in approximately the same manner as in the combustion wick 6 shown in Figure i. A burnout section 81, which is made of fiberglass, and a suction section 82, which is made of a sintered material, is connected to each other by a connector member 83. A portion of the suction section 82, whose portion is smaller than a head 82a of the suction section 82, has a smaller cross-sectional area than that of the head 82a, and the fuel suction rate is thereby set to be less than the fuel burning regime in section 81 of burning. In addition, the head 82a of the suction section 82 has an increased cross-sectional area and serves as a fuel reservoir, so that a necessary length of continuous combustion time can be had. A combustion wick 9 illustrated in Figure 3B is composed in approximately the same manner as in the combustion wick 7 shown in Figure 2. A section 91 of burning, which is made of a sintered porous ceramic or glass material, and a suction section 92, which is made of a sintered material or a fiber material, are connected to one another by a connector member 93. A portion of the suction section 92, which portion is smaller than a head 92a of the suction section 92, has a smaller cross-sectional area than that of the head 92a, and the fuel suction rate is thereby set to be less than the fuel burning regime in the 91 fuel region. In addition, head 92 of the section 92 of suction and a holding portion 91a of the burning section 91, both portions located within the connector member 93, have an increased cross-sectional area and serve as a fuel-tank to obtain a required length of continuous combustion time . With the combustion wick 8 or 9 described above, when a predetermined combustion time has elapsed coresponding to the amount of fuel retained in the fuel tank, the amount of fuel fed through the suction section 82 or 92 to the section 81 or 91 of burning becomes insufficient, and combustion in section 81 or 91 of burning can not continue. Therefore, the flame becomes small or the fire is extinguished (refer to experimental example 2, which will be described later). By way of example, as the liquid fuel injected in the fuel storage section 5 it is possible to employ an alcohol fuel, which contains, as a main constituent, an alcohol, such as a lower monohydric alcohol selected from the group consisting of alcohol methyl, ethyl alcohol and propyl alcohol, and contains at least one type of hydrocarbon compound having approximately the same boiling point as that of the main constituent, such as a saturated hydrocarbon selected from the group consisting of hexane, heptane, octane, nonane, cyclohexadiene, and cycloheptane. With an alcohol only, a colorless combustion flame is produced. By the addition of the saturated hydrocarbon described above, the upper end portion of the combustion flame is imparted a yellow-orange color due to the emission of high temperature light from the liberated carbon. It is also possible to employ a liquid fuel, which is composed of at least one type of compound selected from the group consisting of heptane, octane and nonane. A liquid fuel composed of a benzine hydrocarbon can also be used. Examples of combustion apparatuses include cigarette lighters, other types of lighters, torches, flashlights and other types of lighting devices. In the experimental examples described below, the lighter 1, in which the combustion wick described above was incorporated, was injected with a predetermined amount of a liquid fuel alcohol type into the fuel storage section 5, and a change in the length of the flame during combustion was measured. <Experimental Example 1 > Experiments were carried out using the first mode of combustion wick according to the present invention in order to find the relationship between the continuous combustion time and the flame length were measured with respect to a change in the amount of liquid fuel ( residual) in the fuel storage section. Specifically, the suction performance of the suction section was evaluated with respect to an increase in the suction distance that occurs when the amount of residual fuel is reduced. The results shown in Figure 4 were obtained. The initial flame length is set at 30mm. There was a tendency for the flame length to become relatively small with the passage of combustion time after ignition. In addition, in the cases in which the amount of initial fuel was small, the tendency of the decrease in the length of the flame to increase was observed. However, the effects of the difference in the amount of initial fuel did not occur as a large change in the length of the flame. It was found that a fuel feeding regime corresponding to the fuel burning rate can be obtained by virtue of the good suction performance of the suction section fuel. In a comparative example carried out with respect to the experiments described above, the results shown in Figure 5 were obtained. In the comparative example, a combustion wick was used, which was formed by making a bundle of cotton and fiberglass yarns with ebbe cable thin and had a diameter of 3mm. In the combustion wick, the burning section and the combustion section were made of the same material and formed as an integral body. In the comparative example shown in Figure 5, the change in the length of the flame accompanying combustion was affected in a manner marked by the fluctuation in the initial fuel quantity. In cases in which the initial fuel quantity was large (4 or 3 grams), the initial flame length could be set at 30mm, and the fluctuation in flame length due to the time of combustion was comparatively small. However, in cases where the initial fuel quantity was small (2 or 1 gram), the length of the initial flame could not reach 30mm. Further, when the level of the surface of the fuel liquid was reduced and the fuel feed distance increased, a good suction performance could not be obtained, and the amount of fuel fed became insufficient. As a result, the length of the flame became markedly small with respect to the combustion time. Therefore the combustion wick in the comparative example was not suitable for use in a combustion apparatus.

On the other hand, as illustrated in Figure 4, with the combustion wick according to the present invention, good results were clearly obtained. In addition, the same good results were obtained with the second combustion wicking mode according to the present invention. < Experimental Example 2 > Experiments were carried out using the third combustion wicking mode according to the present invention in order to find a change in the length of the flame with respect to the burning time. The basic structure of the lighter used as the combustion apparatus was the same as that shown in Figure 1, in addition, the same alcohol fuel (95% ethyl alcohol + 5% by weight of n-hexane) was used as the fuel liquid. The cross sectional area of the suction section of the combustion wick was set to be small. The combustion wick had the structure illustrated in Figure 3A. The burning section was made by forming a bundle of glass fibers and folding the bundle in its middle part. Specifically, the glass fibers each having a diameter of 6μm were formed into a bundle so that the fiber density (ie, the weight per unit area) could be 150mg / cm 3. The bundle of glass fibers was bent into a bent beam having an external diameter of 3mm and a length of 10mm. The folded bundle was inserted into the copector member, so that the folded bundle could be projected to a length of 5mm from the upper end of the connector member, and so that the length of the initial flame could be 30mm. The suction section was made by sintering polyethylene powder. Specifically, the powder with the same particle diameter as that described in the previous one was sintered under the same temperature conditions. The suction section did not have the aforementioned head, and the entire suction section had the same diameter (length: 40mm). Experiments were carried out using two kinds of combustion wicks, in which the diameters of the suction section were 3.0mm. and 2.0mm. In experimental example 1 described above, the external diameter of the suction section was 4 mm. The results shown in Figure 6 were obtained. As illustrated in Figure 6, the flame length is cut with the course of combustion time. With the combustion wick that has the suction section, which had the diameter of 3mm, characteristics had to be obtained so that the fire could be extinguished 30 seconds after the ignition. With the combustion wick that has the suction section, which had a diameter of mm, characteristics could be obtained so that the fire could be extinguished 20 seconds after the ignition. For example, in the case of smoking lighters, it is sufficient that the length for the flame is 20 mm. when a time of 10 seconds has elapsed after switching on. Therefore, in the example described above, by "fixing the diameter of the suction section in 2mm, a lighter can be constituted in which the flame is automatically turned off when the combustion has continued for 20 seconds after the ignition.

Claims (10)

1. CLAIMS 1. The combustion wick in a combustion apparatus for a liquid fuel, characterized in that it comprises a suction section, which sucks a liquid fuel through the use of capillarity, and a burning section to burn the sucked liquid fuel, characterized in that The suction section and the burning section of the combustion wick are made of different materials and are connected to each other.
2. 2. The combustion wick according to claim 1, characterized in that a regime is established, at which the liquid fuel is fed through the suction section to the burning section, at a value higher than the rate of combustion. fuel in the burning section.
3. 3. The combustion wick in a combustion apparatus for a liquid fuel, comprising a suction section, which sucks a liquid fuel through the use of capillarity, and a burn section to burn the liquid fuel sucked, characterized in that the section The suction and combustion section of the combustion wick are made of different materials and are connected to each other, and a regime is set at which the liquid fuel is fed through the suction section to the burning section. , at a value lower than the rate of fuel burning to the burning section.
4. 4. The combustion wick according to claim 1 or 3, characterized in that the burning section is constituted by heat resistant fibers selected from the group consisting of glass fibers, ceramic fibers and carbon fibers. The combustion wick according to claim 1 or 3, characterized in that the burning section is formed by making a bundle of fiberglass, bending the bundle in its intermediate part, inserting the bent portion of the bundle into a cylindrical connector member. , by pushing a wedge-like fastening member into space, which is defined by the bent portion of the bundle that has been inserted into the connector member, and thereby securing the bent portion of the bundle. The combustion wick according to claim 1 or 3, characterized in that the burning section is constituted by a material selected from the group consisting of a porous glass material, which has open cells, and a sintered porous ceramic material which It has open cells. The combustion wick according to claim 1 or 3, characterized in that the suction section is made of a sintered material, which is obtained by sintering polyethylene powder, or the like. The combustion wick according to claim 1 or 3, characterized in that the suction section of a material selected from the group consisting of a fiber material, which has been formed into a bundle, and a fiber material , which has been formed to a predetermined shape by the use of an adhesive agent. The combustion wick according to claim 1 or 3, characterized in that the suction section and the burning section are combined with one another by a cylindrical connector member located around an outer periphery of a region, in which one end of the suction section and one end of the burn section connect to each other. The combustion wick according to claim 1 or 3, characterized in that a fuel tank is located in the vicinity of a position, in which the suction section and the burning section combine with each other.