JP3957282B2 - Portable combustion equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a portable combustion apparatus used for cooking, boiling water, etc. outdoors in camping, mountain climbing, or field work.
[0002]
[Prior art]
Conventionally, as this type of portable combustion apparatus, a burner, a fuel tank for storing fuel such as gasoline, a pump for supplying pressure gas into the fuel tank, and a position near the lower part of the burner are disposed. A mixed gas supply pipe that connects the gas injection nozzle and the fuel tank, a gas amount regulator that is provided in the communication path of the mixed gas supply pipe, and one end connected to the mixed gas supply pipe that is inserted into the fuel tank There is known a portable combustion apparatus having a fuel suction pipe.
[0003]
When using the portable combustion apparatus configured as described above, the fuel in the fuel tank, for example, by operating the gas amount regulator to the open side with the pumping air supplied to the fuel tank by the pump. Gasoline is sucked up to the mixed gas supply pipe side through the fuel suction pipe. At this time, the air is taken in, and the mixed gas of gasoline and air is injected from the gas injection nozzle through the mixed gas supply pipe, thereby igniting means. It is burned by ignition. Thus, by using gasoline as fuel, higher combustion efficiency can be obtained compared to a combustion apparatus using a cylinder such as liquefied petroleum gas (LPG).
[0004]
[Problems to be solved by the invention]
However, in this type of conventional combustion apparatus, air is introduced into the fuel that is sucked up from the fuel suction pipe and flows to the mixed gas supply pipe to generate a mixed gas, and thus mixing of the fuel and air is not possible. In addition to being sufficient, the vaporization efficiency of the mixed gas also decreased, and there was a problem that high-fired combustion could not be obtained. Further, if the mixing ratio of the mixed gas is insufficient, incomplete combustion occurs, which may affect the injection of the mixed gas from the gas injection nozzle and may further reduce the combustion efficiency.
[0005]
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a portable combustion device capable of improving the combustion efficiency by quickly and uniformly generating a mixed gas of fuel and air. It is.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, a portable combustion apparatus according to the present invention includes a burner, a fuel tank for storing fuel, a pump for supplying a gas for pumping into the fuel tank, and a position near the lower portion of the burner. A mixed gas supply pipe that communicates between the gas injection nozzle provided and the fuel tank; a gas amount regulator that is provided in a communication path of the mixed gas supply pipe; and one end connected to the mixed gas supply pipe. A portable combustion apparatus comprising a suction valve for generating a mixed gas inserted into the fuel tank, wherein the suction valve is fitted in a gas-tight manner to a suction port provided in the fuel tank. Surrounding the internal pipe with a gap between the internal pipe connected to the flow path provided in the connecting joint, and providing an air inlet on the upper end side, and from the lower end of the internal pipe Extending downward An external pipe, and a suction member with a filter fitted into a lower end opening of the external pipe. The suction member with a filter includes a tapered hole that expands downward, and an upper portion of the tapered hole. A stepped columnar suction member main body having a suction hole composed of a suction hole adjusting small hole communicating with the filter, and a filter mounted on the outer side of the suction hole in the suction member main body. Features.
[0007]
According to the present invention , a suction valve for generating a mixed gas, one end of which is connected to the mixed gas supply pipe and inserted into the fuel tank, is connected to the suction port provided in the fuel tank so as to be airtight. Surrounding the internal pipe with a gap between the internal pipe connected to the flow path provided in the joint and the internal pipe, providing an air inlet on the upper end side, and below the lower end of the internal pipe By comprising an extending external pipe and a suction member with a filter fitted into the lower end opening of the external pipe, the fuel in the fuel tank is drawn by the pressure of air supplied into the fuel tank. When the air is sucked into the internal pipe through the air, the air introduced into the external pipe from the air introduction port is quickly discharged from the entire circumference of the opening of the internal pipe into the fuel in the internal pipe by the ejector action. One uniformly mixed to be able to generate the mist of the mixed gas. Further, impurities contained in the fuel can be removed by the filter.
[0008]
In this case, the stepped columnar suction member main body having a suction hole including a tapered hole that expands downward and a suction hole adjusting small hole that communicates with the upper portion of the tapered hole. When the air is sucked into the internal pipe from the taper hole through the small hole for adjusting the intake amount, air is introduced by the ejector action. The air introduced into the external pipe through the mouth can be mixed more rapidly and uniformly into the fuel in the internal pipe from the entire circumference of the opening of the internal pipe to generate a mist-like mixed gas.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
[0010]
FIG. 1 is a cross-sectional view (a) showing an example of use of an example of a portable combustion apparatus according to the present invention, (a) an enlarged cross-sectional view (b) of (a), and FIG. 2 is a plan view of the portable combustion apparatus. (A), II part enlarged sectional view of (a), (b), FIG. 3 is a sectional view of the suction valve for mixed gas generation in this invention (a), III part enlarged sectional view (b) of (a) It is an enlarged bottom view (c) of (a).
[0011]
The portable combustion apparatus includes a burner 5, a fuel tank 1 that stores fuel, for example, gasoline G, a pump 13 that supplies air as a pressure-feeding gas into the fuel tank 1, and a position near the lower portion of the burner 5. A generator pipe 3 that is a mixed gas supply pipe that connects the gas injection nozzle 8 and the fuel tank 1 that are provided, a gas amount regulator 2 that is interposed in the communication passage 30 of the generator pipe 3, and the generator pipe 3 This is mainly composed of a suction valve 15 for generating a mixed gas which is connected to one end and inserted into the fuel tank 1. The virtue 6 is mounted on the outer periphery of the burner 5.
[0012]
A gasoline G supply port 11 is provided on one side wall of the upper side of the fuel tank 1 (hereinafter referred to as tank 1), and a cap 12 is detachably attached to the supply port 11. Further, the tank 1 is provided with a piston-type pump 13 that supplies pressure-feeding air for pressure-feeding the gasoline G stored in the tank 1. Furthermore, a suction port 14 for fitting a connection joint 15a for connecting an internal pipe 15c of a suction valve 15 (to be described later) in a gas-water tight manner is provided.
[0013]
As shown in FIGS. 1 and 3, the suction valve 15 for generating the mixed gas is provided in a flow passage 15 b provided in a connection joint 15 a that is fitted in a gas-tight manner to a suction port 14 provided in the tank 1. An external pipe 15c that surrounds the internal pipe 15c with a clearance S between the internal pipe 15c to be connected and the internal pipe 15c, has an air inlet 15k on the upper end side, and extends downward from the lower end of the internal pipe 15c A pipe 15d and a suction member 15i with a filter fitted in the lower end opening of the external pipe 15d are configured.
[0014]
In this case, the filter-equipped suction member 15i has a stepped cylindrical shape having a suction hole 15g including a tapered hole 15e that expands downward and a suction amount adjusting small hole 15f that communicates with the upper portion of the tapered hole 15e. The suction member main body 15j and a filter 15h mounted on the outer side of the suction hole 15g in the suction member main body 15j. Note that a plurality of suction member main bodies 15j having a suction hole adjusting small hole 15f having a predetermined size that varies depending on the capacity of the tank 1, that is, the heat capacity of the combustion device, are prepared. Is adapted to be fitted to the external pipe 15d. On the other hand, a plurality of, for example, four air inlets 15k are formed on the upper end side of the external pipe 15d of the suction valve 15.
[0015]
According to the suction valve 15 configured as described above, air is introduced by the ejector action when the gasoline G pressurized by the pump 13 flows through the suction hole 15g through the filter 15h and flows into the internal pipe 15c. Air A is introduced into the external pipe 15d from the port 15k, and the air A is mixed into gasoline to generate a mist-like mixed gas. The mixed gas generated in this way is supplied to the gas injection nozzle 8 side through the generator pipe 3.
[0016]
The generator pipe 3 is provided with a coil member 31 over the entire interior, and has a generator portion 32 that is bent in a substantially U shape and is disposed near the upper portion of the burner 5. In addition, the coil member 31 should just be arrange | positioned at the generator part 32 at least. According to the generator pipe 3 configured in this manner, the mixed gas flowing inside flows spirally while being diffused by the coil member 31, and is further heated by the burner 5, so that the mixed gas is efficiently vaporized. The gas can be supplied to the gas injection nozzle 8 side. Thereby, combustion efficiency can be made favorable and a thermal power can be raised.
[0017]
As shown in FIGS. 1 and 4, the gas amount adjuster 2 connects the generator pipe 3 and the gas injection nozzle 8-communicates with the gas amount adjuster body 20, the generator pipe 3 and the gas injection nozzle 8. An operation shaft 22 having a tapered valve body 21 that is movably inserted into the communication passage 30 and forms an adjustment space with the inner peripheral surface of the communication passage 30, and projects from the tip of the operation shaft 22 Then, a cleaning needle 23 that is movably inserted into the nozzle hole 8a of the gas injection nozzle 8 and a rotary operation knob 25 that is attached to the proximal end side of the operation shaft 22 protruding outward through a heat insulating member 24. And a heat reflecting plate 26 having an inclined piece 26b that is inclined upward from the upper end of the upright piece 26a standing on the upper portion of the gas amount adjuster body 20 toward the upper side of the rotary operation knob 25.
[0018]
Thus, by providing the heat insulating member 24 and the heat reflecting plate 26 on the proximal end side of the rotary operation knob 25 attached to the operation shaft 22, it is located at the lower part of the burner 5 that is placed at a high temperature during use. It is possible to easily perform the gas amount adjustment operation by insulating 25 parts of the rotary operation knob of the gas amount adjuster 2.
[0019]
A mixed gas supply cylinder 7 that communicates with the nozzle hole 8 a of the gas injection nozzle 8 is connected to the distal end side of the gas amount adjuster body 20. As shown in FIGS. 1 and 5, the mixed gas supply cylinder 7 is inserted into the mounting housing 9 through an insertion hole 9 b provided in the side wall 9 a of the mounting housing 9. A plurality of, for example, four air inlets 7 a are provided in a portion of the mixed gas supply cylinder 7 on the outer side of the mounting housing 9.
[0020]
According to the gas amount regulator 2 configured as described above, the cleaning needle 23 can be reliably moved into the nozzle hole 8a of the gas injection nozzle 8 as the gas amount regulator 2 is operated. Impurities contained in the fuel adhering to the nozzle hole 8a, soot generated by combustion, and the like can be easily removed by the reciprocating movement of the cleaning needle 23. Therefore, since the optimum amount of the mixed gas can always be injected from the nozzle hole 8a of the gas injection nozzle 8, it is possible to improve the combustion efficiency, increase the life of the combustion device, and improve the reliability of the device. Can be achieved.
[0021]
The burner 5 is formed in a frustoconical shape, a flame hole plate 52 having a large number of flame holes 51 formed in the conical portion, and a mixed gas diffusion member 55 formed of a hemispherical mesh member. (See FIG. 1B). The burner 5 configured in this way is placed in the upper end opening of a bottomed cylindrical mounting housing 9 fixed to the upper surface of the tank 1. In this case, the mounting housing 9 is fixed to the upper surface of the tank 1 by a fixing screw member 91 inserted through the center of the bottom.
[0022]
On the upper surface of the burner 5 configured as described above, five virtues 6 including four support pieces 6a extending in a cross direction in plan view are fixed. In this case, one end portion of two adjacent support pieces 6 a is connected by an arc-shaped connecting portion 6 e, and this connecting portion 6 e is fitted into a mounting hole 5 a provided in the center portion of the burner 5. A locking claw 6b is provided on the burner 5 so as to be fixed by a fixed crown member 93 attached from above while being in contact with the outer periphery of the mounting cylinder 92, and protruding from the lower surface of the support piece 6a. It is fixed to the burner 5 in a state of being locked to the slit 5b (see FIG. 6). The outer side of each support piece 6a is raised upward, and an uneven corrugated portion 6d is formed on the upper surface of the raised portion 6c.
[0023]
In the combustion apparatus according to the present invention, a donut-shaped tray 94 is disposed on the outer peripheral side of the burner 5. In this case, the tray 94 is provided with a through hole 94a in a part of the bottom, and the generator pipe 3 is guided to the through hole 94a so that the inner peripheral edge 94b is formed on the outer periphery of the opening of the mounting housing 9. It is locked in a state where it is placed on the annular stepped portion 95 provided.
[0024]
In the state where the burner 5, the virtues 6 and the tray 94 configured as described above are assembled, a mounting bolt 96 inserted through the mounting cylinder 92 from above is screwed into a mounting screw portion 91 a provided in the fixing screw member 91. In combination, the burner 5, the virtues 6 and the tray 94 are fixed. Further, by removing the mounting bolt 96 from the mounting screw portion 91a, the burner 5, the virtues 6 and the tray 94 can be divided and removed from the tank 1 for cleaning (see FIG. 5).
[0025]
When the portable combustion apparatus configured as described above is used, first, with the gasoline G stored in the tank 1, the pump 13 is operated to supply the pressure-feeding air into the tank 1. In this state, when the rotary knob 25 is operated to move the valve element 21 in the opening direction, the gasoline G in the tank 1 is filtered by the filter 15h at the lower end of the suction valve 15 by the air pressure in the tank 1 and sucked. It flows through the hole 15g and flows into the internal pipe 15c. The ejector action at this time introduces air A into the external pipe 15d from the air introduction port 15k, and the air A is mixed into the gasoline G to generate a mist-like mixed gas. The mixed gas generated in this way is supplied to the gas injection nozzle 8 side via the generator pipe 3, and is injected from the nozzle hole 8a of the gas injection nozzle 8 and combusted by the ignition means (not shown). . After combustion, the mist-like mixed gas flowing in the generator pipe 3 flows spirally by the coil member 31 and is heated from the burner 5 in the generator section 32, so that it is reliably evaporated and vaporized and supplied to the gas injection nozzle 8 side. Therefore, the combustion efficiency can be improved. Further, by evaporating the mixed gas and efficiently evaporating it, it is possible to suppress a decrease in the capacity of the pressure-feeding air in the tank 1, so that it is not necessary to operate the pump 13 frequently.
[0026]
Furthermore, since the cleaning needle 23 can be reliably moved into the nozzle hole 8a of the gas injection nozzle 8 in accordance with the operation of the gas amount regulator 2, it is contained in the fuel adhering to the nozzle hole 8a. Impurities and soot generated by combustion can be easily removed by reciprocating movement of the cleaning needle. Accordingly, since the nozzle hole 8a of the gas injection nozzle 8 can be kept clean at all times, the combustion efficiency can be improved, the life of the combustion apparatus can be increased, and the reliability of the apparatus can be improved.
[0027]
【The invention's effect】
As described above, according to the present invention, since it is configured as described above, the following excellent effects can be obtained.
[0028]
(1) According to the present invention , when the fuel in the fuel tank is sucked into the internal pipe through the suction member with a filter by the pressure of the air supplied into the fuel tank, it is ejected from the air inlet by the ejector action. The air introduced into the external pipe can be rapidly and uniformly mixed into the fuel in the internal pipe from the entire circumference of the opening of the internal pipe to generate a mist-like mixed gas. Moreover, since the impurities contained in the fuel can be removed by the filter, the combustion efficiency can be improved, and a high-combustion portable combustion apparatus can be obtained.
[0029]
In this case, the stepped columnar suction member main body having a suction hole including a tapered hole that expands downward and a suction hole adjusting small hole that communicates with the upper portion of the tapered hole. By configuring the suction member main body with a filter mounted on the outer side of the suction hole, the ejector action when sucking into the internal pipe from the taper hole via the suction amount adjusting small hole is further enhanced. The air introduced from the air inlet into the external pipe can be mixed more rapidly and uniformly into the fuel in the internal pipe from the entire circumference of the opening of the internal pipe to generate a mist-like mixed gas .
[Brief description of the drawings]
FIG. 1 is a cross-sectional view (a) showing an example of use of an example of a portable combustion apparatus according to the present invention, and an enlarged view (b) of a portion I in FIG.
FIG. 2 is a plan view (a) of the portable combustion device, and an enlarged cross-sectional view (b) of a II part in (a).
FIG. 3 is a cross-sectional view (a) showing an intake valve for mixed gas generation according to the present invention, an enlarged cross-sectional view (III) of part III of (a), and an enlarged bottom view (c) of (a).
FIG. 4 is an enlarged cross-sectional view (a) and an IV part enlarged cross-sectional view (b) of FIG.
FIG. 5 is an exploded cross-sectional view of the portable combustion apparatus.
FIG. 6 is an enlarged cross-sectional view showing the burner, the virtues and the tray mounted state in the present invention.
[Explanation of symbols]
1 Tank (fuel tank)
2 Gas amount regulator 3 Mixed gas passage 5 Burner 8 Gas injection nozzle 13 Pump 14 Suction port 15 Suction valve 15a for joint gas generation 15b Connection joint 15b Flow passage 15c Internal pipe 15d External pipe 15e Taper hole 15f Small for adjusting the suction amount Hole 15g Suction hole 15h Filter 15i Filtered suction member 15j Suction member main body 15k Air inlet 20 Gas amount regulator main body 21 Valve element 22 Operating shaft 23 Cleaning needle 31 Coil member 32 Generator part G Gasoline (fuel)
A Air S Clearance

Claims (1)

A mixed gas supply that communicates the fuel tank with a burner, a fuel tank that stores fuel, a pump that supplies a pressure-feeding gas into the fuel tank, a gas injection nozzle that is disposed near the lower portion of the burner, and the fuel tank A gas amount regulator interposed in the communication passage of the mixed gas supply pipe, and a suction valve for generating mixed gas inserted into the fuel tank with one end connected to the mixed gas supply pipe A portable combustion device comprising:
The suction valve has an internal pipe connected to a flow passage provided in a connection joint fitted in a gas-tight manner with a suction port provided in the fuel tank, and a gap between the internal pipe and the internal pipe. An outer pipe that surrounds the pipe, has an air inlet on the upper end side, extends downward from the lower end of the internal pipe, and a suction member with a filter that is fitted into the lower end opening of the external pipe. Become
The suction member with a filter includes a stepped columnar suction member main body having a suction hole including a taper hole that expands downward and a suction hole adjusting small hole that communicates with an upper portion of the taper hole. A portable combustion apparatus comprising : a filter attached to an outer side of a suction hole in a suction member body .

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