Portable gas burner

Abstract

The present invention provides a portable gas burner comprising: a bent pipe having a fuel injection pipe into which a fuel is injected from the outside; and a fuel tank which is connected to the bent pipe and into which the fuel is injected through the fuel injection pipe. The bent pipe includes: a first portion in which the fuel injection pipe is disposed and an air intake port extending in the longitudinal direction is formed below a lower portion of the fuel injection pipe; a second portion which is spaced apart from the first portion and in which a gas discharge opening is formed; and a third portion that is formed below the first portion and the second portion and connects the first portion and the second portion. A nozzle for injecting the fuel into the first portion is formed at the end of the fuel injection pipe inside the first portion, and the air intake port, through which the air flows in from the outside, is open below the nozzle in the first portion.

Description

portable gas burner

[0001] The present invention relates to a portable gas burner, and more particularly, to a portable gas burner that ignites by mixing fuel and air.

[0002] Typically, portable gas burners are used by placing a pot or similar object on the main body and igniting the gas. Specifically, the burner body, with its burner opening formed in the center of the case, is positioned so that a grill pan, pot, or similar object can be placed on top of the burner body, and a gas cylinder mounting portion is provided for attaching or detaching a butane gas cylinder by operating a lever.

[0003] And, by operating the fuel supply / ignition switch located on the front of the gas cylinder mounting part, fuel from the butane gas cylinder is supplied, and the piezoelectric element generates piezoelectricity to discharge the fuel into the firebox and ignite the flame at the same time.

[0004] However, these portable gas burners have the problem that the burner itself, including the case, is rather large and heavy for portable use, and additional tools such as pots, kettles, and grilling pans are required. Furthermore, these portable gas burners are made of flame-resistant metal, which makes them heavy, and they are rarely foldable for miniaturization.

[0005] Meanwhile, immersion burners have also been used as another method of generating a flame, which involves immersing the heating element in a liquid such as water and then generating a flame to heat it.

[0006] However, submerged burners often inhale insufficient air, resulting in incomplete fuel combustion and the generation of carbon monoxide (CO). Furthermore, submerged burners are manufactured as miniaturized products, which can cause the flame to backfire between one tube and the other, completely eliminating the air that should be drawn in between the two tubes, resulting in the generation of large amounts of carbon monoxide (CO).

[0007] In this way, there is a problem that insufficient air volume causes incomplete combustion of the fuel, and the incomplete combustion reduces the heat efficiency of the fuel transferred to the burner.

[0008] The present invention was created to solve the above problems, and the purpose of the present invention is to provide a portable gas burner that mixes fuel and air for complete combustion by arranging an air inlet adjacent to a nozzle through which fuel is ejected.

[0009] According to one embodiment of the present invention, a fuel tank is provided, including a bent pipe in which a fuel injection pipe into which fuel is injected from the outside is formed, and a fuel tank connected to the bent pipe and injecting fuel into the fuel injection pipe, wherein the bent pipe includes a first portion in which the fuel injection pipe is arranged and an air inlet extending in a longitudinal direction is formed at a lower portion of the fuel injection pipe, a second portion spaced apart from the first portion and in which the gas discharge opening is formed, and a third portion formed at a lower portion of the first portion and the second portion and connecting the first portion and the second portion, and a nozzle for injecting fuel into the first portion is formed at an end of the fuel injection pipe in the first portion, and an air inlet for introducing air from the outside is opened at a lower portion of the nozzle in the first portion.

[0010] According to the portable gas burner according to the present invention, the burner may further include a reduction unit disposed inside the first part, in which fuel injected from the nozzle and air introduced from the air inlet are mixed to form a mixed gas, and in which the flow speed of the mixed gas is reduced during the process of flowing the mixed gas within the first part.

[0011] According to the portable gas burner according to the present invention, the reduction unit is formed by a plurality of semicircular pipes being connected in series, and adjacent semicircular pipes are arranged convexly in different directions, the reduction unit is inserted so as to be in contact with the outer wall of the first part, and when the reduction unit is inserted into the first part, a central opening hole through which the mixed gas flows into the reduction unit and a plurality of side opening holes through which the mixed gas flows between the first part and the reduction unit can be formed.

[0012] According to the portable gas burner according to the present invention, an ignition device disposed below the reduction unit and causing combustion of fuel injected from the nozzle may be further included.

[0013] According to the portable gas burner according to the present invention, the device further includes a height adjustment unit that is connected to one end of the reduction unit and movably fixed to the first part, and adjusts the distance between the nozzle and the reduction unit, wherein the height adjustment unit may include a body that has one end connected to the reduction unit, extends from the one end and is bent so as to be disposed outside the first part, and a fixing member that movably couples the body to the first part.

[0014] According to the portable gas burner according to the present invention, a heat insulating part may be further included, which is arranged between the first part and the second part and reduces a decrease in the temperature of a flame ignited from the combustion gas.

[0015] According to the portable gas burner according to the present invention, a bypass pipe directly connected from the third section to the intermediate section of the second section may be further included.

[0016] According to the portable gas burner according to the present invention, the portable gas burner may further include an exhaust extension portion arranged to surround an end of the second portion and capable of adjusting the length of a flow path of combustion gas discharged from the second portion, and the exhaust extension portion may further include a plurality of fixing clips that can contact an outer circumferential surface of the second portion, and an exhaust extension tube that is fixed by the plurality of fixing clips and arranged to surround the second portion and is configured to be movable up and down.

[0017] According to the portable gas burner according to the present invention, a gap through which air is introduced from the outside can be formed between the discharge extension tube and the second part.

[0018] According to the portable gas burner according to the present invention, a backfire prevention unit may be further included, which is arranged above the reduction unit and is formed in a grid shape to lower the flame temperature when the ignited flame moves in the reverse direction to extinguish the flame.

[0019] According to the portable gas burner according to the present invention, the first part may include an upper region in which the fuel injection pipe is arranged, and a lower region extending downward from the upper region, in which the reduction unit and the ignition device are arranged, and having an inner diameter larger than that of the upper region.

[0020] According to the portable gas burner according to the present invention, a vortex generator may be installed on the inner surface of the lower region, positioned above the ignition device, and formed of a plurality of blades that cause vortexes of the fuel and air.

[0021] According to the portable gas burner according to the present invention, the specific gravity of the fuel supplied to the fuel injection pipe is S, the inner diameter of the nozzle is D0, and the inner diameter of the first part is D t And, when the ratio of air flowing into the bending pipe to the amount of fuel ejected from the nozzle, that is, the mixed gas is R,

[0022] [Formula 1]

[0023] R=S 1 / 2 (D t / D0-1), where R can have a value required for complete combustion of the fuel used.

[0024] According to the portable gas burner according to the present invention, the fuel tank may include a storage unit that stores the fuel therein and is connected to the fuel injection pipe to inject the fuel into the fuel injection pipe, a switch formed in the longitudinal direction of the storage unit and connected to the nozzle to instruct to inject the fuel, and a control lever formed on the outside of the storage unit and for controlling the amount of the injected fuel.

[0025] According to the portable gas burner according to the present invention, when the switch is used to instruct the nozzle to inject fuel, the storage unit may be rotated and a locking device may be included to fix the rotated storage unit to the bending tube.

[0026] According to the portable gas burner according to the present invention, the first tube is disposed inside the first part and is formed spaced apart from the inner wall of the first part, and a blocking film is disposed between the third part and the first part so that the end of the first tube faces the third part and is formed so that the space between the third part and the first part is sealed.

[0027] According to one embodiment of the present invention, a fuel injection pipe is provided, including a first pipe, a second pipe formed to surround a lower region of the first pipe, and a nozzle formed to inject fuel in a direction toward the second pipe, inserted into the inside of the first pipe, and an air inlet formed in the first pipe, which is arranged between the second pipes and through which air mixable with the fuel injected inside the first pipe is introduced.

[0028] According to the portable gas burner according to the present invention, the inner diameter of the first tube can be formed to be equal to or smaller than the inner diameter between the outer circumference of the second tube and the outer circumference of the first tube.

[0029] According to the portable gas burner according to the present invention, by arranging a single bent pipe, the nozzle through which fuel is sprayed and the air inlet through which air is introduced are arranged adjacently, so that sufficient air is introduced to the nozzle side, thereby providing the effect of sufficiently mixing the fuel and air.

[0030] The ignition device can maintain a high temperature by completely combusting a sufficiently mixed gas mixture, and thus the flame can be maintained even when immersed in a cold liquid.

[0031] FIG. 1 is a perspective view showing a portable gas burner according to one embodiment of the present invention.

[0032] Figure 2 is a perspective view showing the state of use of Figure 1.

[0033] Fig. 3 is a cross-sectional view showing a schematic state of the bending pipe of Fig. 1.

[0034] Figure 4 is a plan view of the bending pipe of Figure 1.

[0035] FIGS. 5 to 10 are cross-sectional views showing a bent pipe according to different embodiments of the present invention.

[0036] Fig. 11 is a drawing showing a portable gas burner according to another embodiment of the present invention.

[0037] Fig. 12 is a cross-sectional view showing a portable gas burner according to another embodiment of the present invention.

[0038] While the present invention has been described with reference to the embodiments illustrated in the drawings, these are merely exemplary, and those skilled in the art will appreciate that various modifications and equivalent alternative embodiments are possible. Therefore, the true scope of technical protection of the present invention should be determined by the technical spirit of the appended claims.

[0039] FIG. 1 is a perspective view showing a portable gas burner (1) according to one embodiment of the present invention, FIG. 2 is a perspective view showing a state of use of a portable gas burner (1) according to one embodiment of the present invention, FIG. 3 is a cross-sectional view showing a schematic state of a bending pipe (P) of a portable gas burner (1) according to one embodiment of the present invention, and FIG. 4 is a plan view of a bending pipe (P) of a portable gas burner (1) according to one embodiment of the present invention.

[0040] Hereinafter, a portable gas burner (1) according to one embodiment of the present invention will be described with reference to FIGS. 1 to 4. The portable gas burner (1) includes a bending pipe (P), a fuel tank (T), a reduction unit (110), and an ignition device (120).

[0041] The above-mentioned bending pipe (P) is formed as an integral pipe in a '∪' shape, and includes a first part (P1), a second part (P2), and a third part (P3) that are formed integrally with each other.

[0042] The first part (P1) above has a fuel injection pipe (P1a) through which fuel is injected from the outside, and an air inlet (P1b) extending along the length direction is formed at the lower portion of the fuel injection pipe (P1a).

[0043] More specifically, a nozzle (N) for injecting fuel into the interior of the first portion (P1) is formed at the end side of the fuel injection pipe (P1a) in the first portion (P1). An air inlet (P1b) for introducing air from the outside is opened at the lower portion of the nozzle (N) in the first portion (P1). Accordingly, the nozzle (N) for injecting fuel and the air inlet (P1b) for introducing air are arranged adjacent to each other, so that the gas jet injected from the nozzle (N) can have the effect of allowing sufficient air to be introduced to the side due to the Venturi effect.

[0044] At this time, referring to Fig. 3, air can be sucked in through the air inlet (P1b) or the opening open to the upper portion of the first portion (P1). In addition, the air sucked into the first portion (P1) at this time utilizes the venturi principle, so that the air necessary for combustion can be sucked in only with the pressure of the gas injected from the nozzle (N).

[0045] Meanwhile, the portable gas burner of the present invention, unlike an industrial submerged gas burner, is a miniaturized gas burner that enables sufficient air absorption solely through the venturi effect, which is difficult to achieve in an industrial submerged gas burner.

[0046] The second part (P2) is spaced apart from the first part (P1) and has a gas discharge opening (P2a) formed at the top. At this time, the gas discharge opening (P2a) and the air intake opening at the top of the first part (P1) may have different angles toward each other. Specifically, the direction in which air is discharged from the gas discharge opening (P2a) and the direction in which air flows into the first part (P1) may form an angle with each other. Through this, the exhaust gas discharged from the gas discharge opening (P2a) and the air flowing into the first part (P1) can be prevented from mixing with each other.

[0047] In addition, the angle formed by the first part (P1) and the gas discharge opening (P2a) can be adjusted so that the exhaust gas discharged from the gas discharge opening (P2a) does not flow into the air inlet (P1b) or the upper part of the first part (P1), or the position of the air inlet (P1b) can be adjusted. Through this, the influence of the exhaust gas discharged from the gas discharge opening (P2a) being mixed with the air flowing in from the upper part of the first part (P1) or the air flowing in from the air inlet (P1b) can be minimized.

[0048] The third portion (P3) is formed below the first portion (P1) and the second portion (P2), and connects the first portion (P1) and the second portion (P2). At this time, the third portion (P3) may extend in a curved manner at least in part in consideration of the flow of the mixed gas. At this time, the space of the third portion (P3) may be a space greater than the space simply connecting the two ends of the first portion (P1) and the second portion (P2). Specifically, the third portion (P3) may form a space having an inner diameter that is three times or more the inner diameter of the first portion (P1).

[0049] The above fuel tank (T) is connected to the above-mentioned bending pipe (P), injects fuel through the fuel injection pipe (P1a), and includes a storage unit (T1), a switch (T2), a control lever (T3), and a locking device (T4). At this time, the fuel tank (T) can serve as a handle of a portable gas burner. However, a handle (not shown) that can hold the heater during operation or when overheated can be additionally arranged. Such a handle can lift the entire portable gas burner. Meanwhile, the fuel tank can be formed so that a user can directly refill it. In addition, the fuel tank can be formed as a replaceable cartridge.

[0050] The above storage unit (T1) stores the fuel therein and is connected to the fuel injection pipe (P1a) to inject the fuel into the fuel injection pipe (P1a). Here, the fuel stored in the storage unit (T1) may be in a liquid state, and when injected into the first part (P1) through the fuel injection pipe (P1a), it may be vaporized and injected into the first part (P1) in a gaseous state. Meanwhile, ignition can be assisted by installing a valve for injecting fuel into the fuel injection pipe (P1a) and a valve for adjusting the amount of air intake. Specifically, a valve for adjusting the amount of fuel injected and an air intake adjustment valve for adjusting the amount of air intake may be arranged. At this time,

[0051] The switch (T2) is formed in the longitudinal direction of the storage unit (T1) and is connected to the nozzle (N) to instruct fuel to be injected, and the control lever (T3) is formed on the outside of the storage unit (T1) and can control the amount of fuel injected from the nozzle (N).

[0052] In addition, when instructing to inject fuel into the nozzle (N) using the switch (T2), the storage unit (T1) is rotated, and a locking device (T4) is installed to fix the rotated storage unit (T1) to the bending pipe (P).

[0053] The above locking device (T4) is formed to be slidable on the upper side of the fuel tank (T), and when the portable gas burner (1) is used, the fuel tank (T) is rotated as shown in Fig. 2 and then inserted into a groove (not shown) formed on the side of the bending pipe (P) to be fixed.

[0054] Next, the reduction unit (110) that controls the flow speed within the first part (P1) and the ignition device (120) that causes combustion in the mixed gas that has passed through the reduction unit (110) will be described.

[0055] The above reduction unit (110) is positioned inside the first part (P1). Fuel injected from the nozzle (N) and air introduced from the air inlet (P1b) are mixed and flow into a mixed gas. The reduction unit (110) reduces the flow speed of the mixed gas while the mixed gas flows within the first part (P1).

[0056] In addition, the reduction unit (110) may be formed by connecting a plurality of semicircular pipes in a continuous manner, with adjacent semicircular pipes being convexly arranged in different directions, and the reduction unit (110) may be inserted so as to be in contact with the outer wall of the first portion (P1). Specifically, referring to FIG. 4, the reduction unit (110) may be formed by connecting semicircular pipes in an intersecting manner.

[0057] When the above reduction unit (110) is inserted into the first part (P1), a central opening hole (H1) through which the mixed gas flows inside the reduction unit (110) and a plurality of side opening holes (H2) through which the mixed gas flows between the first part (P1) and the reduction unit (110) can be formed.

[0058] In addition, the reduction unit (110) may be inserted and placed in the first part (P1), and further, the reduction unit (110) may be placed on the second part (P2) or third part (P3) side.

[0059] If the inner diameter of the first portion (P1) is formed small enough to inhale only the amount of air required for combustion, the speed of the mixed gas is fast, making combustion impossible in the first portion (P1). Accordingly, the inner diameter of the second portion (P2) can be expanded, and the speed reduction unit (110) can be arranged on the expanded inner diameter side to induce combustion. In addition, the expansion of the inner diameter can increase efficiency by slowing down the flame speed.

[0060] The above ignition device (120) is placed below the reduction unit (110). Then, it generates a spark in the mixed gas passing through the reduction unit (110), thereby combusting the mixed gas.

[0061] Hereinafter, a method of mixing fuel injected from the nozzle (N) and air introduced through the air inlet (P1b) to form a mixed gas and igniting the same will be described.

[0062] First, fuel is injected in a gaseous state from the nozzle (N), and air is introduced through the air inlet (P1b). Thereafter, the fuel and air are mixed to form a mixed gas. The mixed gas passes through the central opening hole (H1) and the side opening hole (H2). At this time, since the width of the side opening hole (H2) is relatively narrow compared to the width of the central opening hole (H1), the speed of the mixed gas passing through the side opening hole (H2) is relatively reduced.

[0063] The mixed gas flowing without resistance through the central opening hole (H1) of the above reduction unit (110), and a portion of the mixed gas not flowing toward the central opening hole (H1), passes through a plurality of side opening holes (H2), thereby reducing the speed of the portion of the mixed gas.

[0064] Thereafter, the mixed gas passing through the central opening hole (H1) and the side opening hole (H2) is combusted by the ignition device (120). Specifically, some of the mixed gas whose speed is reduced in the plurality of side opening holes (H2) is ignited and added to the flame of the mixed gas that has come out first, so that combustion can be continuously maintained. Specifically, if the speed of the mixed gas exceeds about 40 cm / s, it is difficult to maintain the flame. The speed of some of the gas that has passed through the side opening hole (H2) is reduced to ignite it, and the flame of the gas coming out of the side opening hole (H2) continues to add the flame to the large amount of high-speed mixed gas coming out of the central opening hole (H1). At this time, the speed of the mixed gas that has passed through the central opening hole (H1) reaches several m / s, making ignition difficult.

[0065] In order to properly control the mixed gas in the portable gas burner (1) of the present invention, it is necessary to design the above-mentioned bending pipe (P) to an appropriate size. Specifically, it is necessary to control the size of each component of the bending pipe (P) so that the vaporized gas discharged from the nozzle (N) is mixed with sufficient air and completely combusted during the process of passing through the above-mentioned bending pipe (P).

[0066] Looking at the Prigg formula, it is as follows. The specific gravity of the fuel supplied to the fuel injection pipe (P1a) is S, the inner diameter of the nozzle (N) is D0, and the inner diameter of the first part (P1) is D t And, when the ratio of air flowing into the bending pipe (P) to the amount of fuel ejected from the nozzle (N), that is, the fuel-to-air ratio of the mixed gas is R, R is as shown in [Formula 1].

[0067] [Formula 1]

[0068] R=S 1 / 2 (D t / D0-1)

[0069] Here, when using the same nozzle and Venturi tube, even when reducing the amount of gas ejected, the “ratio” of air being sucked in is maintained, and only the ratio of the nozzle hole inner diameter and the Venturi tube inner diameter affects the mixed gas.

[0070] Thus, the above mixing ratio R has a value required for complete combustion of the fuel used. For example, when butane gas is used as fuel, it is characterized by a value of 30 to 32. In addition, if LPG (liquefied petroleum gas) or natural gas (city gas, Natural Gas) is used as fuel, R may have a value of 11 to 13. In addition, the R value may be additionally absorbed by about 5% more than the ideal value for complete combustion. In addition, the principle of air intake utilizes the Venturi effect.

[0071] Hereinafter, the bending pipe (Pa) of the portable gas burner (2) according to different embodiments of the present invention will be described. Here, the components of the portable gas burner (2) of the present invention that are redundant with those previously mentioned will be omitted in the following description.

[0072] Referring to FIG. 5, the portable gas burner (2) of the present invention includes a bending pipe (Pa), a fuel tank (T), a reduction unit (110), an ignition device (120), and a height adjustment unit (130).

[0073] The height adjustment unit (130) is connected to one end of the reduction unit (110) and is movably fixed to the first part (P1). The height adjustment unit (130) includes a body (131a) and a fixing member (131b). The height adjustment unit (130) can adjust the height of the reduction unit within the first part by adjusting the relative height with respect to the first part (P1). Accordingly, the height adjustment unit (130) adjusts the distance between the nozzle (N) and the reduction unit (110).

[0074] The above body (131a) may be formed in a '∩' shape. One end of the body (131a) is connected to the reduction unit (110), and the other end of the body (131a) extends upward from the one end and is bent to be placed outside the first part (P1). That is, one end of the body (131a) is placed inside the first part (P1), the other end of the body (131a) is placed outside the first part (P1), and the central side of the body (131a) passes through the air inlet (P1b). Accordingly, the body (131a) may be formed to span the air inlet (P1b).

[0075] The above fixed member (131b) is movably connected to the body (131a) on the first part (P1).

[0076] Specifically, the height of the reduction unit (110) within the first portion (P1) can be adjusted using the height adjustment unit (130) to adjust the gap between the nozzle (N) and the air inlet (P1b) and the reduction unit (110). Through this, a space in which the fuel injected from the nozzle (N) is mixed with the air introduced through the air inlet (P1b) can be adjusted, thereby forming a mixed gas satisfying the above-described R value.

[0077] Specifically, the purpose of the reduction unit (110) is to maintain the flame while passing through the reduction unit (110), since it is difficult to maintain the flame when the mixed gas flows at a high velocity. That is, the flame can start while passing through the reduction unit (110). Therefore, the starting position of the flame can be adjusted by adjusting the position of the reduction unit (110).

[0078] At this time, the reason for adjusting the starting position of the flame is as follows.

[0079] When placing a burner in water in a cup, the water level may not be constant. For example, when boiling water in a pot, the flame is below the water, preventing overheating if there is water in the pot. However, if the amount of water is insufficient, the upper part of the first section (P1), where the flame exists, may not be submerged in water. In this case, the upper part of the first section (P1) may overheat. In particular, in the case of a perfectly mixed gas, the temperature may reach almost the maximum from the start of the flame. Therefore, by adjusting the position of the reduction unit (110) according to the water level, the flame generation start point can be adjusted to be below the water level, thereby preventing various problems caused by overheating.

[0080] Hereinafter, a description will be given of a bending pipe (Pb) of a portable gas burner according to different embodiments of the present invention. Any overlapping components of the portable gas burner of the present invention that have been previously mentioned will be omitted in the following description.

[0081] Referring to FIG. 6, the portable gas burner of the present invention includes a bending pipe (Pb), a fuel tank (T), a reduction unit (110), an ignition device (120), and a heat preservation unit (140).

[0082] The insulating portion (140) prevents the heat of the flame of the first portion (P1) from being transferred to the second portion (P2). Specifically, most of the flame may exist within the first portion (P1). In this case, a short combustion length may be formed when the air mixture is 100%.

[0083] At this time, if the heat insulating part (140) is a metal plate, the heat caused by the flame within the first part (P1) may cause the heat insulating part (140) to become red-hot. The exhaust gas within the second part (P2) may absorb the heat of the red-hot heat insulating part (140). Accordingly, the flame temperature of the first part (P1) may decrease. The greater the temperature difference between the water to be heated and the heating gas, the higher the heat transfer efficiency.

[0084] In the absence of a heat insulating member (140), heat is transferred to the exhaust gas within the second section (P2), and the exhaust gas combusted in the second section (P2) tends to be discharged in a straight line without a vortex phenomenon. Therefore, in the absence of a heat insulating member (140), the heat discharged by the exhaust gas discharged from the second section (P2) increases, and the heat transfer efficiency transferred to the water to be heated in the first section (P1) is significantly reduced.

[0085] Therefore, the insulation part (140) is intended to maintain the high temperature of the flame inside the first part (P1) and to prevent the heat of the flame inside the first part (P1) from being lost to the second part (P2).

[0086] That is, when the heat of the first part (P1) is directly transferred to the second part (P2), the heat of the first part (P1) transferred to the second part (P2) heats and discharges combustion gas having low thermal conductivity. Accordingly, by arranging the heat insulating part (140) between the first part (P1) and the second part (P2), the heat of the first part (P1) can be prevented from being transferred to the second part (P2).

[0087] Next, referring to FIG. 7, the portable gas burner of the present invention includes a bending pipe (Pc), a fuel tank (T), a reduction unit (110), an ignition device (120), a heat insulating unit (140), and a bypass pipe (150).

[0088] The above bypass pipe (150) is directly connected from the third part (P3) to the middle part of the second part (P2) and bypasses the flame ignited from the combustion gas toward the second part (P2).

[0089] Specifically, when the external temperature is low, or when melting ice or alpine snow, or when the temperature of the content to be heated is tens of degrees below zero, the flame ignited inside the portable gas burner is maintained, but when discharged from the first part (P1) to the second part (P2), the flame may be extinguished at the third part (P3), which is the intermediate point connecting the first part (P1) and the second part (P2). This is because the temperature of the flame drops rapidly due to the cold temperature, and as a result, when the extinguishing point drops below about 600 degrees Celsius, carbon monoxide may be generated and extinguished.

[0090] At this time, by arranging the bypass pipe (150), the flame is directly transferred from the lower portion of the reduction unit (110) to the gas discharge opening (P2a) of the second portion (P2), thereby facilitating re-combustion of the mixed gas discharged from the third portion (P3) by flowing the first portion (P1).

[0091] Next, referring to FIG. 8, the portable gas burner of the present invention includes a bending pipe (Pd), a fuel tank (T), a reduction unit (110), an ignition device (120), and an exhaust extension unit (160).

[0092] The above discharge extension part (160) is arranged to surround the end of the second part (P2), and is capable of adjusting the length of the flow path of combustion gas discharged from the second part (P2), and includes a plurality of fixing clips (161) and a discharge extension tube (162).

[0093] The above plurality of fixing clips (161) are formed so as to be in contact with the outer surface of the second part (P2), and the discharge extension tube (162) is fixed by the plurality of fixing clips (161) and is formed so as to surround the second part (P2) so as to be able to move up and down. In addition, a gap (g) is formed between the discharge extension tube (162) and the second part (P2) so as to allow air to flow in from the outside.

[0094] Specifically, when the outside temperature is low, or when melting ice or snow in a high mountain, or when the temperature of the content to be heated is tens of degrees below zero, the combustion of the mixed gas may become unstable in the middle because the heat of the portable gas burner is released to the surroundings due to the outside temperature. At this time, by installing the discharge extension (160), the combustion gas can be re-introduced from the outside through the gap (g), and the inflowing air and the combustion gas remaining inside the second portion (P2) can be re-mixed to re-burn the incompletely combusted gas.

[0095] Next, referring to FIG. 9, the portable gas burner of the present invention includes a bending pipe (Pe), a fuel tank (T), a reduction unit (110), an ignition device (120), and a backfire prevention unit (170).

[0096] The above-mentioned anti-reverse flame part (170) is arranged below the above-mentioned reduction part (110) and is formed in a grid shape so that when an ignited flame moves in the reverse direction, the temperature of the flame can be lowered to extinguish the flame.

[0097] Specifically, when using butane with a slow combustion rate as fuel gas, in a process such as locking the valve to extinguish the flame in a situation where the air required for combustion is mixed at more than 100%, if the gas pressure drops, the mixing ratio is maintained, but the ejection speed of the mixed gas may drop. At this time, in order to prevent the burned flame from backfiring and coming toward the nozzle (N), the backfiring prevention unit (170) is arranged to lower the temperature of the flame and prevent backfiring. Specifically, this is to prevent the flashback phenomenon in which the flame is sucked toward the nozzle.

[0098] Next, referring to FIG. 10, the portable gas burner of the present invention includes a bending pipe (Pg), a fuel tank (T), a reduction unit (110), an ignition device (120), and a vortex generator (180).

[0099] Here, the first part (P1) is formed with an upper region (P1-1) in which the fuel injection pipe (P1a) is arranged, and a lower region (P1-2) extending downward from the upper region (P1-1), having the reduction unit (110) and the ignition device (120) arranged therein, and having an inner diameter larger than that of the upper region (P1-1).

[0100] In addition, a vortex generator (180) is installed on the inner surface of the lower region (P1-2), is positioned above the ignition device (120), and is formed of a plurality of blades (181) that generate vortices of the fuel and air. The vortex generator (180) can replace the reduction unit (110).

[0101] Specifically, when a vortex is generated as a mixed gas jet passes through a vortex generator (180), ignition can occur even without a reduction unit (110). This is because the vortex-generated gas disperses the flame generated slightly after ignition, thereby allowing the flame to continue to propagate, thereby maintaining the flame. In other words, the vortex generator (180) can replace the role of the reduction unit (110).

[0102] Additionally, the vortex generator (180) can increase the combustion speed, thereby enhancing the efficiency of the device. Therefore, only one of the vortex generator (180) and the reduction unit (110) is required for ignition.

[0103] In addition, when the above-mentioned bending tube (Pg) is expanded for complete combustion, too much air is absorbed, resulting in a decrease in thermal efficiency, and the bending tube (Pg) cannot be used if it is larger than the inner diameter of the appropriate tube. To overcome this, in the case of the portable gas burner (8) of the present invention, the inner diameter (D) of the upper region (P1-1) of the above-mentioned bending tube (Pg) for 100% air absorption t1 ) and the inner diameter (D) of the lower area (P1-2) for spreading the inhaled air t2 ) is formed, and a vortex generator (180) that causes a vortex of the fuel and air is placed below the reduction unit (110) to mix the fuel and air.

[0104] Specifically, the inner diameter (D) of the lower region (P1-2) that absorbs only the required amount of air t2 ) is set to the inner diameter, the mixed gas flow rate does not burn too quickly. To solve this, the inner diameter (D) of the lower region (P1-2) is set to t2 ) can be expanded. However, in this case, more air than necessary may be absorbed, which may reduce efficiency.

[0105] Therefore, the inner diameter (D) of the upper region (P1-1) for proper air absorption t1 ) is determined, and the inner diameter (D) of the lower region (P1-2) is determined after air intake. t2) can be formed or expanded smoothly. Accordingly, the flow rate of the mixed gas or the speed of the flame can be reduced. However, since it is difficult to sufficiently reduce the flow rate, a reduction unit or a vortex generator (180) can be placed in the lower region (P1-2) so that the flow rate can be sufficiently reduced to maintain the flame. Meanwhile, as described above, only one of the reduction unit (110) and the vortex generator (180) is required to maintain the flame.

[0106] Fig. 11 is a drawing showing a portable gas burner according to another embodiment of the present invention. Referring to Fig. 11, the burner further includes a first pipe (P11) disposed inside the first part (P1) and formed spaced apart from the inner wall of the first part (P1), and a blocking film (P31) disposed between the third part (P3) and the first part (P1), such that the end of the first pipe (P11) faces the third part (P3) and the space between the third part (P3) and the first part (P1) is sealed.

[0107] Specifically, the structure is such that the first pipe (P11) is inserted into the inside of the first part (P1). In addition, the fuel injection pipe (P1a) is introduced into the inside of the first pipe (P11). The end of the first pipe (P11) extends close to the third part (P3). In addition, a barrier (P31) may be formed between the first part (P1) and the third part (P3).

[0108] In the present embodiment, the flame generated in the second section (P2) may not be transmitted to the first tube (P11). That is, the first tube (P11) and the first section (P1) are spaced apart from each other, so that a wider insulation structure can be formed due to an air layer, etc. Therefore, there is a beneficial effect in insulating heat within the first tube (P11).

[0109] In addition, since heat is generated at the point where the second part (P2) and the first part (P1) are in contact due to the flame generated in the second part (P2), internal air circulation inside the first part (P1) can be activated due to the temperature difference between the left and right sides shown in the drawing inside the first part (P1). Accordingly, cooling of the first pipe (P11) becomes easier, and heating of the first pipe (P11) can be prevented, thereby preventing the mixed gas inside the first pipe (P11) from being heated and generating buoyancy, so that more air can be sucked into the air inlet (P1b), and furthermore, the temperature of the mixed gas flowing inside the first pipe (P11) can be cooled further.

[0110] In particular, a barrier film (P31) formed between the first part (P1) and the third part (P3) prevents flames generated in the second part (P2) and the third part (P3) from spreading to the first part (P1).

[0111] Fig. 12 is a cross-sectional view showing a portable gas burner according to another embodiment of the present invention.

[0112] A portable gas burner according to one embodiment of the present invention includes a first pipe (P1'), a second pipe (P2') formed to surround a lower region of the first pipe (P1'), a fuel injection pipe (P1a) inserted into the first pipe (P1') and having a nozzle formed therein for injecting fuel in a direction toward the second pipe (P2'), and an air inlet (P1b) formed in the first pipe (P1') and arranged between the second pipes (P2') and through which air (a) mixable with the fuel injected inside the first pipe (P1') is introduced.

[0113] Specifically, the first pipe (P1') is inserted and placed inside the second pipe (P2'). And, the second pipe (P2') is formed to surround the lower region of the first pipe (P1'). The first pipe (P1') is formed to protrude into the upper region of the second pipe (P2'). And, a flange portion (P1d) protruding from the outer circumferential surface of the first pipe (P1') may be formed between the first pipe (P1') and the second pipe (P2') so that combustion gas escaping from the second pipe (P2') is not sucked into the air inlet (P1b) formed in the first pipe (P1').

[0114] Specifically, the flange portion (P1d) can serve to prevent combustion gas discharged from the second pipe (P2') from re-entering the air inlet (P1b) of the first pipe (P1'), while also preventing the heat of high-temperature combustion gas from being transferred to the upper portion of the flange portion (P1d).

[0115] Meanwhile, although the drawing only shows the flange portion (P1d) protruding in a direction perpendicular to the first pipe (P1'), the flange portion (P1d) may extend at an oblique angle to the first pipe (P1'). This can prevent the exhausted combustion gas from being re-introduced into the air inlet (P1b).

[0116] Fuel in the form of gas injected from the nozzle (N) of the fuel injection pipe (P1a) formed on the upper side (P1'a) of the first pipe is mixed with air introduced through the air inlet (P1b) formed on the lower side of the fuel injection pipe (P1a) of the first pipe (P1') to form a mixed gas (m). The mixed gas (m) proceeds downward along the first pipe (P1'). At this time, a flame (f) may not be generated inside the first pipe (P1').

[0117] And, the mixed gas (m) can form a vortex (tb) in the vortex space by colliding with the lower end (P2'b) of the second pipe (P2') at the lower end of the first pipe (P1'). As the mixed gas (m) forms the vortex, it is ignited by an ignition device (not shown), so that the combustion gas is ejected upward while being engulfed in a flame (f) inside the second pipe (P2').

[0118] Here, the inner diameter (d1) of the first pipe (P1') may be formed to be equal to or smaller than the inner diameter (d2) between the outer circumference of the second pipe (P2') and the outer circumference of the first pipe (P1'). As the inner diameter of the first pipe (P1') is formed to be equal to or smaller than the inner diameter between the outer circumference of the second pipe (P2') and the outer circumference of the first pipe (P1'), a mixed gas (m) flows inside the first pipe (P1') at a speed exceeding the combustible speed of the gas.

[0119] In addition, the mixed gas (m) that reaches the vortex space of the second tube (P2') has a reduced velocity, making it easier to maintain the flame (f). In addition, the flame (f) can be maintained due to the vortex phenomenon.

[0120] According to one embodiment of the present invention, a portable gas burner is easy to miniaturize overall by adopting a structure in which a first tube (P1') is inserted into a second tube (P2'). In addition, by adopting a structure in which the first tube (P1') is inserted into a second tube (P2'), the structure is simple and production costs are reduced. Furthermore, due to pressure generated by a flame (f) inside the second tube (P2'), combustion gas is discharged through a gas discharge opening (P2a). In addition, due to a flange portion (P1d) between the first tube (P1') and the second tube (P2'), there is little obstruction in air being sucked into the air inlet (P1b), so that the amount of oxygen is sufficient, making complete combustion easy.

[0121] Meanwhile, the first pipe (P1') can be manufactured with an insulating structure having high insulating performance. For example, the outer wall of the first pipe (P1') can use a ceramic insulating material or a two-layer tube. Specifically, since the temperature of the flame (f) generated in the second pipe (P2') can exceed 1000 degrees Celsius, the first pipe (P1') is heated by the flame (f), and when the mixed gas (m) is heated, the flow of the mixed gas (m) flowing downward due to buoyancy may be hindered, and the velocity may decrease. This decrease in the velocity of the mixed gas (m) may reduce the venturi effect of the air inlet (P1b), which may reduce air intake.

[0122] However, the first pipe (P1') may not be manufactured with an insulating structure having high insulation performance. Specifically, as the mixed gas (m) flows into the first pipe (P1') at a high speed, it has the effect of cooling the inside of the first pipe (P1'). In addition, since water and other substances are present outside the second pipe (P2'), the heat generated in the second pipe (P2') is dissipated to the outside, so high insulation performance is not required between the first pipe (P1') and the second pipe (P2'), making manufacturing easy.

[0123] Each component of the present invention described in the above detailed description should not be construed as limiting in all respects, but rather as illustrative. The scope of the present invention should be determined by a reasonable interpretation of the appended claims, and all modifications within the equivalent scope of the present invention are intended to be included within the scope of the present invention.

Claims

1. A bent pipe in which a fuel injection pipe is formed to inject fuel from the outside; and It is connected to the above-mentioned bending pipe and includes a fuel tank that injects fuel into the above-mentioned fuel injection pipe. The above-mentioned bending pipe is, A first part in which the fuel injection pipe is arranged and an air inlet extending along the length direction is formed at the lower portion of the fuel injection pipe; A second part spaced apart from the first part and having a gas discharge opening formed therein; and A third part formed below the first and second parts and connecting the first and second parts, A nozzle for injecting fuel into the first part is formed at the end of the fuel injection pipe within the first part, A portable gas burner having an air inlet opening at the bottom of the nozzle of the first part to allow air to flow in from the outside.

2. In claim 1, A portable gas burner further comprising a reduction unit disposed inside the first section, wherein fuel injected from the nozzle and air introduced from the air inlet are mixed to form a mixed gas, and the reduction unit reduces the flow speed of the mixed gas while the mixed gas flows within the first section.

3. In claim 2, The above reduction gear is, A plurality of semicircular pipes are connected in series, and adjacent semicircular pipes are arranged convexly in different directions. The above reduction unit is inserted so as to be in contact with the outer wall of the first part, When the above reduction unit is inserted into the first part, A central opening through which the mixed gas flows into the inner side of the above reduction unit, and A portable gas burner having a plurality of side openings formed between the first part and the reduction part through which the mixed gas flows.

4. In claim 2, A portable gas burner further comprising an ignition device disposed below the reduction unit and causing combustion of fuel injected from the nozzle.

5. In claim 2, It further includes a height adjusting part that is connected to one end of the above reduction part, is movably fixed to the first part, and adjusts the distance between the nozzle and the reduction part. The above height adjustment part, A body that is connected to the reduction section at one end and extends from the section and is bent so as to be placed outside the first section; A portable gas burner comprising a fixed member movably connected to the first part, wherein the body is:

6. In claim 1, A portable gas burner further comprising a heat insulating part disposed between the first and second parts and reducing a decrease in the temperature of a flame ignited from combustion gas.

7. In claim 1, It further includes an exhaust extension part arranged to surround the end of the second part and capable of adjusting the length of the flow path of combustion gas discharged from the second part. The above discharge extension part is, A plurality of fixing clips that can be contacted on the outer surface of the second part, A portable gas burner further comprising an exhaust extension tube that is fixed by the plurality of fixing clips and is arranged to surround the second part and is movable up and down.

8. In claim 7, A portable gas burner in which a gap is formed between the above-mentioned exhaust extension tube and the second part, through which air is introduced from the outside.

9. In claim 2, A portable gas burner further comprising a flashback prevention unit disposed on the upper portion of the above-mentioned reduction unit and formed in a grid shape to lower the flame temperature when an ignited flame moves in the reverse direction to extinguish the flame.

10. In claim 2, The first part above, The upper area where the fuel injection pipe is placed, A portable gas burner including a lower region extending downward from the upper region, having the reduction unit and ignition device arranged therein, and having an inner diameter larger than that of the upper region.

11. In claim 10, A portable gas burner comprising a vortex generator formed of a plurality of blades that are installed on the inner surface of the lower region and arranged above the ignition device and cause vortexes of the fuel and air.

12. In claim 1, The specific gravity of the fuel supplied to the above fuel injection pipe is S, the inner diameter of the nozzle is D0, and the inner diameter of the first part is D t And, when the ratio of air flowing into the bending pipe to the amount of fuel ejected from the nozzle, that is, the mixed gas is R, [Formula 1] R=S 1 / 2 (D t / D0-1) Follow, Here, R is a portable gas burner characterized by having a value required for complete combustion of the fuel used.

13. In claim 1, The above fuel tank, A storage unit that stores the fuel inside and is connected to the fuel injection pipe to inject the fuel into the fuel injection pipe; A switch formed in the longitudinal direction of the storage section and connected to the nozzle to instruct fuel to be injected; A portable gas burner formed on the outside of the storage portion and including a control lever for controlling the amount of the injected fuel.

14. In claim 13, When instructing the nozzle to inject fuel using the above switch, A portable gas burner comprising a locking device for rotating the storage unit and fixing the rotated storage unit to the bending tube.

15. In claim 1, A first pipe arranged on the inside of the first part and formed spaced apart from the inner wall of the first part; and A portable gas burner further comprising a barrier film disposed between the third part and the first part, the end of the first pipe facing the third part, and formed so that the space between the third part and the first part is sealed.

16. Section 1; A second pipe formed to surround the lower area of ​​the first pipe; A fuel injection pipe is formed with a nozzle that injects fuel into the first pipe in a direction toward the second pipe, A portable gas burner, wherein an air inlet is formed in the first tube, which is positioned on the upper side of the second tube, and through which air that can be mixed with fuel injected inside the first tube is introduced.

17. In claim 16, A portable gas burner, wherein the inner diameter of the first pipe is formed to be equal to or smaller than the inner diameter between the outer circumference of the second pipe and the outer circumference of the first pipe.

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