blowhole

Abstract

[Problem] To provide a fire blower which has a tip end discharge portion capable of supplying, in the vicinity of a fire source, exhaled breath obtained by taking in outside air, and which is adapted for fine control of an amount of discharged air. [Solution] This fire blower comprises a blowing-in means 2, an intermediate pipe 3, and an ejecting means 4, wherein: the blowing-in means 2 is formed as a hollow body having a circular open end 12 forming a distal end, and having a truncated cone-shaped outer shape leading to a connecting portion 13 formed to have a smaller diameter than the open end 12; the intermediate pipe 3 is configured by coupling together a plurality of hollow tubes 5 that are coupled by means of mutually detachable connecting means 10, 11, at least one of the connecting means 10, 11 being configured to be capable of connecting to the connecting portion 13 of the blowing-in means 2; and the ejecting means 4 is configured as a hollow tubular body having, at one end, a connecting portion 13 capable of engaging with the connecting means 10, 11 of the intermediate pipe 5, and provided at a tip end, which is the opposite end, with an opening 19.

Description

[Technical Field]

[0001] The present invention relates to a blowpipe. [Background technology]

[0002] When camping or glamping, people often have outdoor bonfires. A bonfire starts with a small ember, then gradually grows larger by adding more flammable materials. Once the fire has gained momentum, the main fuel, such as firewood, is burned. A blowpipe is a tool used to increase the fire in a bonfire or hearth. A blowpipe is a long, slender tube that is used to blow air into one end and expel it from the other end to efficiently increase the fire's momentum.

[0003] A conventional example is the blowpipe described in Patent Document 1. This blowpipe is configured as a cylinder with an inlet at one end and an outlet at the other end. This blowpipe has a node with a small hole in the center that obstructs airflow within the cylinder a predetermined length from the outlet, and an air inlet hole near the node, near the outlet, that allows air to flow in from outside the cylinder. The blowpipe is characterized by the provision of an air inlet hole near the node near the outlet that allows air to be taken in from outside the cylinder, so that the air blown out through the small hole in the node takes in outside air and supplies it to the source of the fire. Furthermore, as can be seen from the description (paragraph 0004) that the blowpipe can be made of synthetic resin, wood, bamboo, cardboard, or other materials in addition to metal, this indicates that the blowpipe is designed to be positioned at a certain distance from the source of the fire to blow air.

[0004] When starting a fire, it is necessary to grow the fire until it burns steadily, using fuels such as firewood with high heat output, and airflow is required depending on the condition of the fire. Since the fire will go out if the airflow is too weak or too strong, the airflow needs to be carefully adjusted, especially in the early stages of starting a fire. Also, when building up the fire's momentum, a high flow of air is needed, not directed at the flames, but at the source of the burning fire. However, the blowpipe described in Patent Document 1 is not intended to be used with its nozzle placed near the source of the fire, but is intended to be used when blowing air at a location away from the source of the fire. Furthermore, it is understood that when the flames get large, the nozzle is placed outside the flames to prevent the blowpipe from being burned by the flames. This makes it difficult to blow air delicately or pinpoint the source of the fire. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-92313 Summary of the Invention [Problem to be solved by the invention]

[0006] The present invention was invented in consideration of the above circumstances, and aims to provide a blowpipe with a tip discharge part made of a material and structure that can supply breathed air taken in from outside at a position close to the source of the fire, and that is suitable for fine control of the amount of air discharged.Furthermore, it is an object to provide a blowpipe that does not draw in hot air from the tip discharge part when air is drawn in through the mouthpiece. [Means for solving the problem]

[0007] In order to solve the above problems, the present invention has the following configuration: It has a blowing means, an intermediate pipe and a jetting means, the blowing means has a connecting portion having an open end constituting a blowing port provided at a terminal end and a connecting port provided at a tip end and communicating with the intermediate pipe, and also has an outer shell portion having an external shape similar to a truncated cone shape, the opening of which narrows along a flow line from the open end to the connecting port; the intermediate pipe is configured as a hollow tubular body made up of a plurality of hollow tubes connected to each other by detachable connecting means, The blowpipe is characterized in that the blowing means has a connection part at one end having a connection port that communicates with the intermediate pipe, and is configured as a hollow tubular body with an internal flow path that runs from the connection port to an opening at the tip.

[0008] Furthermore, the present invention is characterized in that in the blowpipe, a plurality of holes are provided in an outer shell portion that constitutes the external shape of the blowing means.

[0009] Furthermore, the present invention is characterized in that in the blowpipe, a throttle portion is provided inside the blowing means for reducing the area of ​​the flow path toward the opening provided at the tip. [Effects of the Invention]

[0010] The blowpipe of the present invention is made of a metal material, so it is heat-resistant and has the effect of being able to supply air near the source of the fire where you want to intensify the flame. Furthermore, if an antibacterial material such as brass is used, it has the effect of being able to maintain the hygiene of the blowing means that comes into contact with the mouth. Furthermore, since the blowing means is not held in the mouth, but is only in contact with the opening at the end, it has the effect of being able to be used hygienically. The blow-in means that the lips are placed against has many openings on the outer periphery of its outer shell, which has the effect of preventing or reducing the backflow of hot air from the blow-out means when the user inhales. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a perspective view of the appearance of a blowpipe according to an embodiment of the present invention. FIG. [Figure 2] FIG. 10 is a perspective view of the appearance of the blowpipe according to the present embodiment, viewed from another direction. [Figure 3] FIG. [Figure 4] FIG. 4 is a cross-sectional view of the intermediate pipe shown in FIG. 3. [Figure 5] FIG. [Figure 6] FIG. 6 is a cross-sectional view of the blowing means shown in FIG. 5. [Figure 7] FIG. [Figure 8] FIG. 8 is a cross-sectional view of the ejection means shown in FIG. 7. DETAILED DESCRIPTION OF THE INVENTION

[0012] An embodiment of the present invention will now be described with reference to the drawings, in which: Figures 1 and 2 show perspective views of the appearance of a blowpipe 1 according to this embodiment. The blowpipe 1 comprises a blowing means 2 used to blow in the breath exhaled from the mouth, an intermediate pipe 3 through which the air current generated by the blown breath passes, and an ejection means 4 that ejects the air current that has passed through the intermediate pipe 3. The intermediate pipe 3 is formed by connecting a plurality of hollow tubes 5, and the overall length of the blowpipe 1 can be changed depending on the number of hollow tubes 5 used. In this embodiment, a single intermediate pipe 3 is formed by connecting six hollow tubes 5 of the same shape, and the blowing means 2 is attached to one end of the intermediate pipe 3 and the ejection means 4 is attached to the other end, thereby forming a blowpipe 1 with a total length of, for example, approximately 540 mm.

[0013] FIG. 3 is a side view of the hollow tube 5 that constitutes the intermediate pipe 3, and FIG. 4 is a longitudinal cross-sectional view of the hollow tube 5 at the center. The intermediate pipe 3 is formed as a hollow pipe having a female thread 10 at one end and a male thread 11 at the other end, and is formed by connecting hollow tubes 5 of the same shape that are detachably formed with the female thread 10 and the male thread 11 as connecting means. Each hollow tube 5 is formed to be approximately 80 mm long. The intermediate pipe 3 has a screw 10 at one end to which the blowing means 2 can be attached, and a male screw 11 at the other end to which the ejection means 4 can be attached.

[0014] FIG. 5 is a side view of the blowing means 2, and FIG. 6 is a longitudinal central cross-sectional view of the blowing means 2. As shown in FIG. The blowing means 2 has a hollow outer shell 14 having an external shape that changes in multiple stages and resembles a truncated cone. Note that this external shape may also be formed into a truncated cone. The distal end has an outer diameter of approximately 30 to 35 mm and is provided with a circular open end 12 that forms the mouthpiece. The edge of open end 12 is the part that can come into contact with the lips, like the mouthpiece of a wind instrument, and is formed as a rounded edge with no corners. Open end 12 is the part used as the mouthpiece for blowing breath into. The end opposite open end 12 is a connecting part 13 with intermediate pipe 3, and is provided with a male thread that can be threaded into female thread 10 formed at the end of intermediate pipe 3 and a connecting port that communicates with intermediate pipe 3. The inner diameter of connecting part 13 is approximately 14 mm.

[0015] A plurality of circular holes 15, 16, and 17 are formed along three circumferential portions, namely, a small diameter portion, an intermediate portion, and a large diameter portion, whose outer shape changes in multiple stages, on the peripheral wall surface of the outer shell portion 14 constituting the blowing means 2. For example, the diameter of circular hole 15 is 6 mm, that of circular hole 16 is 8 mm, and that of circular hole 17 is 9 mm.

[0016] FIG. 7 is a side view of the ejection means 4, and FIG. 8 is a longitudinal central cross-sectional view of the ejection means 4. The ejection means 4 is a hollow tubular body having a connecting portion consisting of a female thread 18 that can be threaded onto the male thread 11 formed at the tip of the intermediate pipe 3, and a connection port that communicates with the intermediate pipe 3, and has an outer shape that tapers slightly in diameter toward the tip. A circular opening 19 provided at the tip of the ejection means 4 serves as an ejection port for releasing the airflow blown in from the blowing means 2. Furthermore, inside the jetting means 4, there is provided a throttle section 20 formed so as to gradually reduce the area of ​​the flow path along the flow path through which the air passes.

[0017] The blowing means 2, intermediate pipe 3, and blowing means 4 that make up the blowpipe 1 described above are all made of metal, and in this embodiment, brass is used as an example of an optimal metal material. Brass is a material that is resistant to deterioration due to oxidation and thermal deformation, and because it is a copper alloy, it also has antibacterial properties. In particular, the blowing means 2 is the part that comes into contact with the human mouth, and is therefore prone to condensation from saliva and exhaled breath. For this reason, it is preferable that the blowing means 2 be easy to wipe off and have antibacterial properties, and brass is used as the most suitable material in this embodiment. Of course, it may be made of other metal materials, but in that case, it is preferable to use a material that is resistant to rust and to perform surface treatment such as plating as necessary. The intermediate pipe 3 is also made of antibacterial brass or other metal materials, but has a split structure that allows multiple hollow tubes 5 to be detachably connected for use, making it easy to clean and dry after use and improving hygiene and safety.

[0018] When blowing breath into the blowing means 2, the entire blowing means 2 is not held in the mouth, but is placed over the edge of the opening at the end, as in the mouthpiece of a wind instrument, with the lips placed over the edge and the breath blown through the gap formed between the upper and lower lips at a controlled flow rate. In this case, the fast-flowing breath draws in outside air through the opening in the peripheral wall, sending a mixture of the breath and outside air into the intermediate pipe 3. As a result, the airflow passing through the interior of the intermediate pipe 3 and ejected from the ejection means 4 is a mixture of oxygen-reduced breath and oxygen-enriched outside air. Therefore, the mixed air ejected from the ejection means 4 is more effective at intensifying the fire than an ejection of only breath. Furthermore, since the blowing means 2 is placed against the lips and not held in the mouth, saliva is less likely to adhere to it during use, which reduces the proliferation of bacteria and their invasion into the oral cavity that may otherwise be caused by saliva adhering to it.

[0019] As described above, blowpipe 1 is designed to be blown into by placing pursed lips against the opening. Furthermore, since it is difficult to inhale when the blowpipe is not held in the mouth and lips are placed against open end 12, inhalation is necessarily performed by removing the lips from open end 12. Furthermore, even if a person inhales forcefully with their lips placed against open end 12, most of the inhaled air flows in through circular holes 15, 16, and 17 formed in outer shell 14. Because the blowpipe 1 according to this embodiment has the blowing means 2 with these characteristics, it is designed to prevent the hot air from the blowing means 4 from flowing back when breathing in. Even if the hot air flows back to the blowing means 2, it can be mixed with the air flowing in through the circular holes 15, 16, and 17 formed in the outer shell 14, which has the effect of lowering the temperature of the hot air that reaches the human body.

[0020] The inner diameter of the intermediate pipe 3 is, for example, approximately 14 mm. The diameter of the opening 19 at the tip of the ejection means 4 is narrowed to approximately 10 mm by the narrowing section 20. The action of this narrowing section 20 makes it possible to pressurize the mixed air of the breath blown in and the outside air, increasing the flow rate and enabling the mixed air to be supplied pinpoint to the source of the fire.

[0021] Several examples of how to use the blowpipe 1 will now be described. When the bonfire starts To start a fire, a starter is created by using a lighter, match, or a small ember to ignite ignition material such as paper, thin dry wood chips, or wood shavings. Since easily ignitable materials burn out quickly, the flame needs to be gradually increased while adding ignition material to prevent the material from burning out. Supplying too much air during this process will extinguish the fire due to wind pressure, so the amount of air supplied must be adjusted. Using a blowpipe (1) allows for the air to be drawn in from the outside, but the amount of air can be adjusted by varying the strength of the breath to create the right amount of airflow to get the fire going. When the embers are small, blow gently, then increase the strength of your breath as the fire gains momentum, increasing the heat and allowing the fire to spread quickly and efficiently to the firewood or charcoal.

[0022] When adding firewood or charcoal to the heat source When new firewood or charcoal is added, it is at room temperature and will not ignite until it reaches the combustion temperature. In order to spread the fire to the added firewood or charcoal, it is necessary to use a heat source such as burning firewood or charcoal to raise the temperature until it reaches the ignition temperature. At this time, the temperature of the heat source can be raised by supplying air to the burning area with a blowtorch 1 to promote combustion. As the temperature rises, heat is transferred to the firewood or charcoal through radiant heat from the heat source and contact, causing the fire to spread.

[0023] -Adjusting heat while cooking The heat source suitable for cooking is a glowing ember, which occurs after the flames have died down, and if left unattended, the temperature will gradually drop. To increase the heat output of the glowing embers and raise the temperature, air must be supplied, and the use of a blowtorch 1 makes it possible to supply air directly to the burning area. This increases the heat output of the glowing embers and the amount of heat generated. Also, if there are many unburned areas, continuing to supply air can return the glowing embers to a flaming combustion state. [Industrial Applicability]

[0024] The present invention can be used for a blowtorch used to start a fire in a bonfire, hearth, etc., or to promote combustion. [Explanation of symbols]

[0025] 1 blowpipe 2. Blowing method 3 Mid pipe 4 Ejection means 5 hollow tube 10 female thread 11 Male thread 12 Open end 13 Connection 14 Outer shell 15, 16, 17 circular holes 18 Female thread 19 Aperture

Claims

1. It has a blowing means, an intermediate pipe and a jetting means, the blowing means has a connecting portion having an open end constituting a blowing port provided at a terminal end and a connecting port provided at a tip end and communicating with the intermediate pipe, and also has an outer shell portion having an external shape similar to a truncated cone shape, the opening of which narrows along a flow line from the open end to the connecting port; the intermediate pipe is configured as a single tubular body made up of a plurality of hollow tubes connected to each other by detachable connecting means; the ejection means is configured as a hollow tubular body having a connection part at one end with a connection port communicating with the intermediate pipe, and having a flow path therein extending from the connection port to an opening at the tip thereof; A blowpipe characterized in that a plurality of holes are provided in an outer shell portion that constitutes the external shape of the blowing means.

2. 2. A blowpipe according to claim 1, wherein a throttle section is provided inside said blowing means to reduce the area of ​​the flow path toward the opening provided at the tip.

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