JPH0366562B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fuel suction part of a wick for a combustion appliance.
More specifically, the present invention relates to a wick for a combustion appliance used in the fuel suction part of a wick for a combustion appliance such as an oil stove or an oil stove that uses kerosene or the like as a liquid fuel.

A wick for a combustion appliance consists of a fuel suction section that sends liquid fuel upward by capillary action and a combustion section where the sucked up fuel is combusted and therefore at a high temperature. Although it is not possible to clearly distinguish between the fuel suction part and the combustion part, when looking at the performance of a wick for a combustion appliance, it is conceptually divided into the fuel suction part and the combustion part, taking into account the actual use. It is significant to consider its performance.

Conventionally, the most popular wicks for combustion appliances have been made of a thick fabric made of cotton yarn or a cotton yarn/rayon yarn blend as a fuel suction part, and a heat-resistant thick fabric made of glass fiber or glass fiber/carbon fiber placed above it as a combustion part. It has long been used as a typical core.

Such cores, however, have the disadvantage of requiring the use of special machinery to produce thick fabrics, resulting in low productivity and high costs. In other words, thick fabrics use very thick cotton threads such as 8 threads of 10th thread as warp threads, have a special weaving structure, and are so narrow that they cannot be fabricated using regular machines and are expensive. It was not possible to manufacture it with high productivity.

As an idea to increase the productivity of wicks for combustion appliances, a woven or knitted fabric mainly made of glass fiber is prepared in advance, and a smooth-surfaced felt made mainly of glass fiber wool is prepared separately. There is a known attempt to manufacture thick wicks for combustion appliances without using a special loom by placing the above-mentioned felt on both or one side and hammering them together with a needle machine (Jikkosho).
(See Publication No. 45-13978).

According to the publication, the above-mentioned wick for combustion appliances is
Because felt is intertwined with woven or knitted fabric,
Even when combustion is stopped, the flow of fuel is prevented and the fuel is sufficiently stored in the woven or knitted fabric, which has the advantage that combustion can start quickly when reignited.

Also, as a similar structure, instead of the smooth-surfaced felt mainly made of glass fiber wool, a felt made by intertwining and compressing metal fibers or carbon fibers is used (see Utility Model Application Publication No. 50-75434). Or one using felt mainly made of wool-like acrylic synthetic resin fiber, which has better heat resistance than glass fiber (Japanese Utility Model Publication No. 49-140732).
It has been known. Since these wicks for combustion appliances also use woven or knitted fabrics mainly made of glass fibers, it is clear that they are wicks with improved oil storage properties like the previous wicks.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a fuel wick for a combustion appliance with a novel structure.

Another object of the present invention is to provide a wick for a combustion appliance, which has a high suction speed for liquid fuel such as kerosene used as fuel, and therefore can burn a large amount of fuel and generate a high calorific value. The purpose is to provide a fuel suction unit.

Still another object of the present invention is that the suction speed of the liquid fuel is high, so that a large height (distance) can be taken from the liquid level of the liquid fuel to the combustion part, and therefore the liquid fuel can be heated to a high temperature. An object of the present invention is to provide a fuel suction part of a wick for a combustion appliance, which can prevent the fuel from burning and continue safe combustion.

Still another object of the present invention is to provide a fuel suction section of a wick for a combustion appliance that can smoothly ignite (reignite) or continue combustion due to its high suction speed of liquid fuel.

Still another object of the present invention is to provide a combustion appliance which has the advantage of being extremely easy to manufacture and can be manufactured at low cost with simple operations, and therefore can be manufactured at low cost in addition to the above-mentioned excellent advantages. The object of the present invention is to provide a fuel suction part of a wick.

Still another object of the present invention is to have excellent dimensional stability not only during storage before being attached to a combustion appliance but also while being used after being attached to a combustion appliance.
Therefore, it is an object of the present invention to provide a fuel suction part of a wick for a combustion appliance that will not gradually shrink while being attached to the combustion appliance and become unable to move up and down smoothly in a metal slit if it falls over. .

Further objects and advantages of the present invention will become apparent from the description below.

According to the present invention, such objects and advantages of the present invention include: one or more layers of long fibers consisting of a plurality of long fibers arranged substantially in one direction; and a plurality of layers of short fiber random web layers. The long fiber layer and the short fiber web layer are alternately laminated so that the short fiber web layer forms the outermost layer, and are physically integrated so as not to separate. This is achieved by the fuel suction part of the wick for a combustion appliance.

The wick for fuel appliances has a fuel suction part A and a heat-resistant combustion part B.
In the present invention, these A and B
has a physically distinct form.

The fuel wicking part of the core of the present invention is comprised of one or more layers of long fibers consisting of a large number of long fibers arranged substantially in one direction and multiple layers of random web layers of short fibers.

As mentioned above, the fuel suction part of the wick of the present invention is physically distinguished from the heat-resistant combustion part, and since the fuel suction part has a high suction speed, it receives a cooling effect from the sucked up fuel. The layers and short fiber random web layers may of course be comprised of heat resistant materials, but are not required to be comprised of heat resistant materials.

A large number of long fibers forming the long fiber layer are, for example,
Rayon, cellulose acetate, polyamide,
It can be acrylic, polyester, polyvinyl formal, polyethylene, polypropylene, polyvinyl chloride, fully aromatic polyamide, carbon fiber or glass fiber. Among these, polyamides such as 6-nylon, 6,6-nylon, polyesters such as polyethylene terephthalate, polyethylene, and polypropylene are particularly preferably used because they are industrially easily available.

The long fiber layer can be made of one type of these long fibers, or can be made of a mixture of two or more types.

These long fibers preferably have a diameter of about 0.003 to about
It is used with a thickness of 0.03mm. The long fibers made of thermoplastic resin are preferably drawn yarns or drawn heat-treated yarns.

Further, the short fiber web layer may be made of, for example, rayon, cellulose acetate, polyamide, acrylic, polyester, polyvinyl formal, polyethylene, polypropylene, polyvinyl chloride,
It can be wholly aromatic polyamide, carbon fiber, glass fiber, cotton, linen or wool.

Among these, webs made of materials highly resistant to heat shrinkage, such as rayon, wholly aromatic polyamide, carbon fiber, glass fiber, cotton, or linen, are particularly preferably used.

The long fiber and short fiber webs as described above are produced by methods known per se.

The long fiber layer is formed of a large number of long fibers as described above arranged substantially in one direction. In order to arrange a large number of long fibers substantially in one direction, for example, an untwisted tow consisting of a large number of long fibers is gradually expanded while applying mechanical vibration, or a tow of untwisted long fibers is It is sufficient to prepare a large number of yarn frames wound with multi-threads, and perform operations such as pulling out a large number of long fibers from the frames and arranging them.

In order to impart shape retention to the arranged long fiber layer, an adhesive such as an acrylic ester adhesive may be applied as necessary when or after the long fibers are arranged. . A plurality of long fiber layers thus produced can be stacked to give a desired thickness, if necessary.

The fuel wicking part of the core of the present invention is comprised of one or more of the long fiber layers and multiple short fiber random web layers. For example, as shown in FIGS. 3 and 4 of the attached drawings, these structures range from the simplest structure in which the long fiber layer 4 is the intermediate layer and the two short fiber random web layers are the outer layers to the short fiber Various structures can be adopted, including a structure in which a plurality of long fiber layers and a plurality of short fiber random web layers are alternately stacked so that the random web layer forms the outermost layer.

In the fuel suction part of the present invention, it is further necessary that the long fiber layer and the short fiber random web layer as described above are physically integrated so that they cannot be separated. The means of physical integration is, for example, needle punching or stitch bonding. When a chemical means such as an adhesive is used as a means of integration, the adhesive deteriorates or is dissolved and removed by repeated contact with the liquid fuel for a long time, and the long fiber layer and the short random web layer are eventually separated. It cannot be used in the present invention because it causes peeling.

When integrating by needle punching,
It has been found that it is preferable to have an average of 50 to 400 needle punches per cm ² of the outermost surface area. The density of such a needle punch is sufficient to prevent peeling even when used for a long period of time, and does not interfere with the high suction rate of liquid fuel that is the object of the present invention.

For the same reason, when integrating with stitchbond, 1.5 to 5 mm of penetration from the front side to the back side is required.
For example, 10 to 60 sewing machine threads/10cm
It was also found that it is preferable to exist at a density of .

One layer of the long fiber layer in the fuel wicking part of the core of the present invention preferably has a basis weight of about 20 to about 800 g/ ^m2 , and one layer of the short fiber random web layer preferably has a basis weight of about 40 to about 600 g/m2. It has a basis weight of ^m2 .
The weight ratio of the long fiber layer to the short fiber layer and the random web layer is preferably 1:0.2 to 2.

The fuel wick of the present invention provides a wick for a combustion appliance by providing a heat resistant combustion section adjacent to the top.

The heat-resistant combustion section is made of a woven or knitted fabric of a heat-resistant material, preferably a woven or knitted fabric of glass fiber, carbon fiber or ceramic fiber. These fibers and woven or knitted fabrics have long been known in the art. For example, ceramic fibers include fibers whose main components are silica and alumina (for example, The Babcock & Wilcox
Company's products) etc. are used.

The wick includes the fuel suction part and the combustion part,
For example, as shown in FIG. 1, they are machined and physically integrated.

The shape of the wick can be flat to suit the combustion appliance, or it can be cylindrical as shown in FIGS. 1 and 3.

The above wick can be suitably used as a wick for combustion appliances such as base tank type and cartridge tank type oil stoves and oil stoves. With base tank type combustion appliances, as the combustion time increases, the fuel level in the base tank decreases, so when using a conventional wick, the fuel uptake gradually decreases, resulting in a weakening of the firepower or natural There were times when the fire was extinguished. However, since the fuel suction part of the above-mentioned wick has a high suction speed, it is possible to continue supplying fuel to the combustion part at a constant level even when the fuel level decreases, so the above-mentioned disadvantages can be avoided. .

In addition, the feature of the wick equipped with the upper part of the fuel device of the present invention is that it has a high fuel suction speed, which makes it possible to generate a high calorific value, and the liquid level of the liquid fuel in the tank and the combustion Since it is possible to increase the height up to the top, it is also possible to avoid the risk of the liquid fuel being heated to a high temperature.

For example, according to the present invention, a wick can be provided in which the fuel wicking portion of the wick has a high wicking rate of about 110 seconds or less for kerosene as defined below.

The kerosene wicking rate is measured according to the method described in 6.2 of JIS S2038-1977. The method is as follows.

Place the sample in a drying oven at a temperature of 110 ± 10℃, dry it until it reaches a constant temperature, then place it in a desiccator and dry it at room temperature (20℃).
5mm from the top of the plate.
and mark 105mm, then soak it in JIS K2203 No. 1 kerosene up to the 105mm mark, and immediately after dipping, use a second watch to measure the kerosene from the 105mm mark to the 5mm mark. The permeation time was measured, and the required time (seconds) was defined as the wicking rate.

In addition, the amount of kerosene absorbed is measured according to the method described in 6.1 of JIS S2038-1977. The method is as follows.

(1) Place the sample in a drying oven at a temperature of 110±10°C, dry it until it reaches a constant weight, then place it in a desiccator, cool it to room temperature (20±15°C), and then measure its mass with a scale. Let the value at that time be W ₀ .

(2) Sufficient amount of JIS K2203 to submerge the entire core.
Soak in No. 1 kerosene (kerosene) for about 5 minutes.

(3) Hang the wick in the air with the burning part facing up and horizontally so that the oil droplets falling from the bottom of the wick are interrupted and the time interval between oil droplets is about 5 minutes. After it has aged, measure its mass using a scale. Let the value at that time be W ₁ .

(4) Calculate the suction amount using the following formula.

Sucking amount (weight %) = W ₁ −W ₀ /W ₀ ×100 The present invention will be described in more detail below with reference to Examples.

Example 1 Single fiber is 1.5 denier and total denier is 30000
The untwisted tows of long polyethylene terephthalate fibers were aligned in parallel, and while mechanical vibration was applied, the single fibers were gradually manipulated to become almost parallel with a uniform thickness, and then acrylic ester adhesive was applied. A fabric having a basis weight of 40 g/m ² was obtained by applying the agent. Twelve layers of this fabric were stacked to form a long fiber layer. Polyethylene terephthalate short fibers (3 denier x 51
mm) with a basis weight of 100 g/ ^m2 , and needle punched (200 pieces/1
cm ² ) and integrated to prevent peeling. The resulting integrated product had a thickness of 2.5 mm.

The kerosene wicking rate and kerosene wicking amount of this integrated product were measured by the method defined above. Suction speed is 95
Second, the wicking amount was 320% by weight.

Next, this integrated structure was used as a fuel suction section, and a heat-resistant combustion section made of 100% glass fiber fabric was connected to the top by sewing using glass fiber threads, as shown in Figure 1. A cylindrical core was prepared as shown in Fig. 1 (in Fig. 1, 1 is the core, 2 is the suction part, and 3 is the combustion part). This core was attached to a double-tube kerosene stove and a combustion test was conducted.

The double-tube kerosene stove above has a base tank (approx.
5.5), and the kerosene liquid level when full is approximately 15 cm from the top tip of the wick.

Although the kerosene in the tank was consumed by continuous combustion for 13 hours (the liquid level of kerosene in the tank had fallen by 5 cm), combustion continued well until the end of this increase, and no deterioration in combustion performance was observed. .

Example 2 and Comparative Example 1 Fabric weight 300g/m ² manufactured in the same manner as Example 1
Rayon long fiber (single fiber denier 2de) fabric 1
An integrated product (thickness: 3 mm) was produced in the same manner as in Example 1 from the rayon fibers and two random webs of short rayon fibers having a basis weight of 150 g/m ² .

A wick having this integrated product as a fuel suction part was manufactured by attaching a combustion part (glass fiber fabric) on this integrated product in the same manner as in Example 1.

On the other hand, for comparison, a conventional wick was prepared in which a woven wick whose warp was made of six 10-count cotton threads was used as a fuel suction part, and the same combustion part as above was attached to the upper part.

The performance of these wicks was evaluated by conducting a combustion test using a white flame type (convection type) kerosene stove (full oil level 7, height from the kerosene liquid level to the tip of the wick when full oil was approximately 10 cm). compared.

As a result, when using the wick equipped with the fuel suction part of the present invention, the consumption of kerosene was 0.530 /
0.490 when the amount of kerosene is reduced to about 1/4 of the full amount
/It was time.

On the other hand, when using a conventional core for comparison,
Kerosene consumption was 0.470/hour and 0.398/hour at the respective time points.

From the above results, when the wick equipped with the fuel suction part of the present invention is used, compared to the case where the conventional wick is used, the kerosene oil is higher not only when the fuel is full, but also when the amount of kerosene decreases. It can be seen that excellent combustion performance can be obtained depending on the suction speed. Furthermore, it can be seen that when the wick equipped with the fuel wicking part of the present invention is used, the wicking speed does not decrease much even when kerosene is consumed.

Example 3 and Comparative Example 2 Using a wick equipped with the same fuel suction part of the present invention as used in Example 2 and Comparative Example 1 and a conventional wick, a radiant (net type) kerosene stove (full oil capacity) was prepared.
5.5, the height from the kerosene liquid level to the tip of the wick when full was approximately 15 cm).A combustion test was conducted.

As a result, when the above-mentioned wick equipped with the fuel suction part of the present invention is used, the consumption of kerosene is 0.293 when the fuel is full.
/ hour, when the amount of kerosene decreases to about 1/4 of the amount of dripping oil
It was 0.290/hour. On the other hand, when a conventional wick was used for comparison, the kerosene consumption was 0.282/hour and 0.261/hour, respectively.

From the above results, it can be seen that the above-mentioned wick equipped with the fuel suction part of the present invention can obtain the same effect as that considered in Example 2 even if the type of kerosene stove is changed.

[Brief explanation of drawings]

Figure 1 of the accompanying drawings shows a wick for a combustion appliance (hereinafter sometimes simply referred to as wick) equipped with a fuel suction part of the present invention.
FIG. 2 is a schematic perspective view of an embodiment of the invention. Figure 2 shows
2 is a cross-sectional view of the core of FIG. 1 in an arbitrary longitudinal direction; FIG. FIG. 3 is a partially cutaway perspective view of another embodiment of the fuel suction unit. FIG. 4 is a cross-sectional view of the fuel suction section of FIG. 3 in an arbitrary longitudinal direction.

Claims (1)

[Scope of Claims] 1. One or more layers of long fibers made of a fabric formed from a large number of untwisted long fibers arranged substantially in one direction and in a plane, and a short fiber random web layer. The long fiber layer and the short fiber web layer are alternately laminated so that the short fiber web layer forms a smooth outermost layer, and are physically integrated so as not to peel off. A fuel suction part of a wick for a combustion appliance, characterized in that: 2 Claims in which the long fibers of the long fiber layer are made of rayon, cellulose acetate, polyamide, acrylic, polyester, polyvinyl formal, polyethylene, polypropylene, polyvinyl chloride, wholly aromatic polyamide, carbon fiber, or glass fiber. The fuel suction part of the wick for a combustion appliance according to item 1. 3. A patent claim in which the short fiber random web is made of rayon, cellulose acetate, polyamide, acrylic, polyester, polyvinyl formal, polyethylene, polypropylene, polyvinyl chloride, wholly aromatic polyamide, carbon fiber, glass fiber, cotton, hemp, or wool. The fuel suction part of the wick for a combustion appliance according to item 1. 4 The short fiber random web is rayon,
The fuel suction portion of a wick for a combustion appliance according to any one of claims 1 to 3, which is made of wholly aromatic polyamide, carbon fiber, glass fiber, cotton, or hemp. 5. The fuel suction portion of a wick for a combustion appliance according to claim 1, wherein the fuel suction portion is physically integrated so as not to be separated by needle punching or stitch bonding. 6 The above fuel suction part has an average of approximately 1 ^cm2 of outermost surface area.
The fuel suction part of a wick for a combustion appliance according to claim 5, which has 50 to 400 needle punches. 7 The above fuel suction part penetrates from the front side to the back side.
The fuel suction part of a wick for a combustion appliance according to claim 5, which has presser threads with a pitch of 1.5 to 5 mm at a density of 10 to 60 threads/10 cm. 8. The fuel suction portion of a wick for a combustion appliance according to claim 1, wherein each of the long fiber layers has a basis weight of about 20 to about 800 g/m ² . 9 One layer of the above short fiber random web is about 40~
The fuel suction part of a wick for a combustion appliance according to claim 1, having a basis weight of about 600 g/ ^m2 . 10 Weight ratio of long fiber layer to short fiber layer is 1:0.2 ~
2. A fuel suction portion of a wick for a combustion appliance according to claim 1. 11. The fuel suction part of a wick for a combustion appliance according to any one of claims 1 to 10, wherein the wick for a combustion appliance has a flat or cylindrical shape. 12. The fuel wick for a combustion appliance according to claim 1, wherein the fuel wick has a kerosene wicking speed of about 110 seconds or less.