KR101970877B1 - Camping stove device utilizing ammunition box and thermoelectrical generation - Google Patents

Abstract

The present invention relates to a camping stove which can be used outdoors. More particularly, the present invention relates to a camping stove which can recycle an ammunition box or the like as a casing, a thermoelectric generating device is added to obtain electricity by its own heat source, And the motor is driven to provide a combustor with higher combustion efficiency.
The present invention minimizes the external shape of the original ammunition box so as not to reduce the unique charm of the ammunition box and employs a combustion cylinder formed of a double wall structure so that the flame or the heat directly touches the casing And thus the casing is minimized in deformation, deterioration, and corrosion, so that the utility value is not easily reduced even after the use frequency and time.
In addition, it adopts a thermoelectric module to generate electricity in its own combustion heat to drive the combustion air supply blower to increase the combustion efficiency and to drive the fuel supply screw motor to continuously burn. Especially, it is characterized in that an automatic opening and closing device is employed in the heat supply path of the thermoelectric module to prevent breakage of the thermoelectric module and to generate electricity by receiving sufficient heat even in a low combustion state.
The surplus electricity generated in the camping stove according to the present invention can be utilized by being connected to external electric equipment in the outdoors, stored in a rechargeable battery and used as an emergency power source, and a camping stove using thermoelectric generation.

Description

[0001] The present invention relates to a camping stove using an ammunition box and a thermoelectric generator,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pellet burning camping stove which can be used as a cooking or a fire in the open air, recycling an ammunition box or the like to form a casing, generating electricity by its own combustion heat to drive an air supply blower and a fuel supply screw device, An ammunition box that can supply surplus electricity to external equipment, and a camping stove that uses generation of thermoelectric power.

The ammunition box must be something that gives meaning to a lot of people and gives them unique charm. In Korea as well as in many other countries, ammunition boxes are being recycled for various purposes such as storage of objects, interior accessories, and combustor manufacturing.

However, if the ammunition box is used only as a combustor, a portion of the ammunition box is cut to form a fuel inlet, an air hole, a communication hole, an internal combustion plate (grate) Most of them.

This type of combustion method is accompanied by various inconveniences due to the incomplete combustion type appearing in the conventional furnace or furnace, and sometimes the casing such as the ammunition box is deformed, caused discoloration and corrosion due to overheating, Not only does it significantly reduce its unique appeal, but it can also eventually be discarded. In recent years, there have been cases in which electric power is generated by utilizing a thermoelectric element in an outdoor portable combustor, and the blower is driven by the electric energy to improve the combustion efficiency and to be utilized for a certain amount of external electric devices .

However, even with such advanced combustors, there is a limit to being actively utilized due to realistic problems such as low efficiency and high price of current thermoelectric elements. Therefore, it is not yet possible to improve the efficiency of the combustor with its own power in the burners to which this technology is applied, or to supply a practical level of electricity to the external electric device.

1) 1. US05947105 2) 2. US02342500 3) 3. CN103953951 4) 4. WO2006103613 5) 5. WO2017011521 A1 6) 6. KR10-1640029

1. Ferrotec Corporation's technical data (www.ferrotec.co.kr)

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide an ammunition box which can be recycled and used as a combustor casing, minimizing external processing and avoiding direct exposure to heat during use, And the like.

 In addition, the present invention overcomes the low efficiency and high cost problem of current thermoelectric elements, enhances the electricity generation efficiency of the thermoelectric elements by forming a module type of the thermoelectric module, further enhances the performance of the combustor by positively utilizing the electric energy, It is another object of the present invention to provide a combustor having a self heat generation function capable of supplying a practical level of electricity to a device.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a camping stove that satisfies both desires.

As a means for achieving the above object, in the camping stove of the present invention,

An iron square box that can contain combustion pipes, fuel storage tanks, and thermal power devices is used as the outer casing of the combustor. The casing using the ammunition box is provided with a support on the lower side, an opening for installing the operation panel on one side, and an opening for re-processing on the bottom side. Therefore, when the camping stove has finished functioning and is being transported or stored, the original shape of the ammunition box is almost recovered.

The combustion tube is installed in the center of the ammo pack box, and is formed as a double wall of an outer wall body and an inner wall body. The space between the outer wall body and the inner wall body serves as an air flow pipe, and the inside of the inner wall has a cylindrical structure. In addition, the combustion cylinder has a primary combustion chamber from below, a heat absorbing portion for supplying heat to the thermoelectric element in the middle layer, and a secondary combustion chamber for separating the upper portion from the secondary combustion chamber. A grate is installed at the bottom of the primary combustion chamber, and a plurality of air holes are formed in the upper part of the wall in the secondary combustion chamber to supply combustion air to the combustion chamber, respectively.

The air required for combustion is artificially supplied through a blower and operated by electricity obtained by self-heating. The blower sucks the air in the thermoelectric module cooling region to simultaneously perform the cooling function.

The fuel reservoir is divided into a combustion chamber and a partition, and is installed on one side. In the embodiment of the present invention, the fuel reservoir is disposed on the left side of the combustion cylinder. The fuel supply screw includes a drive motor and operates with electricity obtained by self-heat generation.

Further, the heat generator is installed on the side opposite to the reference fuel storage passage, in the embodiment of the present invention, to the right side of the combustion cylinder. A plurality of thermoelectric elements are electrically connected in series and parallel connection to form one module. The thermoelectric module has a heat transfer device for transferring the heat of the combustion tube to the heating part side of the thermoelectric module and a cooling device on the heat radiation part side.

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In particular, an automatic opening / closing device capable of interrupting heat transfer is provided in the path for transferring heat to the thermoelectric module, thereby avoiding damage to the thermoelectric device due to overheating and deterioration of efficiency, Applicable means shall apply.

With this technical result, the camping stove according to the present invention generates electricity using its own combustion heat, drives a blower that supplies combustion air with its electric energy, and a screw device that supplies fuel automatically, Thereby minimizing the occurrence of such crests. Further, the present invention aims to overcome the problems of conventional camping stoves by storing surplus electricity in an internal charging device or supplying them to external electric devices.

(1) In the present invention, the utility value of the ammunition box is further increased and maintained for the same purpose than when the ammunition box is used as a combustor apparatus in the conventional manner. It is machined to the minimum in appearance so that the ammunition box does not detract from its original charm and all the devices necessary for the combustion function are installed inside the casing and minimize the physical and chemical effects of heat use. Will provide a camping stove that does not significantly reduce its utility value.

(2) In addition, a thermoelectric element of a low-grade thermoelectric module is formed as a module to enhance the efficiency of heat generation, and it is positively applied to a camping stove, thereby enhancing the efficiency of the combustor and achieving a compact shape. This makes it possible to omit or reduce a considerable portion of the devices used in the conventional natural convection type combustor.

(3) Effect of the Invention With the derivative effect of the item (2) of the invention, the camping stove of the present invention can adjust the combustion performance variably and stably. Therefore, it can be expanded not only for cooking but also for heating.

(4) In addition, the camping stove of the present invention keeps the use of the thermoelectric element within the recommended use temperature range to prevent damage of the thermoelectric element to the utmost. In addition, it supplies sufficient heat for thermal power generation even in a low- So that the combustor constituting devices can be sufficiently driven, and surplus electricity can be supplied to other external devices of the user, so that it also has the function of an emergency spare power source.

Fig. 1 Outline view of camping stove before use
Fig. 2 is a perspective view of the main body and the lid of the main body when used as a camping stove
Fig. 3 Camping stove structure Cross section
Fig. 4 Profile of the camping stove vertical section
FIG. 5 Air communication pipe and air hole enlargement
6 Thermoelectric generator configuration and opening / closing device perspective view
Fig. 7 Thermostat configuration for opening / closing the heat transfer panel
8 Automatic control device configuration diagram

It is to be understood that the words or words used in the present specification and claims should not be construed in a conventional or dictionary sense and that the inventor can properly define the concept of a term to describe its invention in the best way And should be construed in accordance with the meaning and concept consistent with the technical idea of the present invention.

Therefore, the embodiments described in the present specification and the constitutions shown in the drawings are merely preferred embodiments of the present invention, and not all of the technical ideas of the present invention are described. Therefore, various equivalents And variations are possible.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view of a casing 10 of a camping stove using the ammunition box of the present invention and the generation of thermoelectrons. All the devices for implementing the function of the stove are installed inside the casing 10 and have a shape of an ammunition box as a whole.

2 is a perspective view showing a state in which the main body 11 and the main body lid 12 are separated when the camping stove is used. A fuel reservoir 40 on the left side of the combustion cylinder 20, a thermoelectric generator 50 on the right side, a cooking mechanism support 80 on the upper side of the combustion cylinder, A support base 81 is provided.

3 and 4, the combustion cylinder 20 is formed of a cylindrical outer wall body 24 and an inner wall body 25 and has air flow pipes 33-1 and 34-1 between the two walls, And is connected to the blower 57 by pipes 33 and 34. The inner side of the inner wall 25 has a hollow space in the combustion chamber and is installed as a support 26 on the inner central portion of the main body 11. [

The combustion cylinder 20 is divided into a lower primary combustion chamber 21, a heat absorbing portion 22 for middle layer heat generation, and an upper secondary combustion chamber 23, and is separated and joined in a lamination manner. The primary combustion chamber 21 and the secondary combustion chamber are formed of a refractory material such as stainless steel and the wall 25 in the secondary combustion chamber is formed with a plurality of air holes 30. [ The outer wall body 22-1 of the middle layer heat absorbing part 22 is made of a material such as aluminum having a high thermal conductivity and the inner wall body 22-2 is made of a hollow cylinder type in close contact with each other as a refractory material such as stainless steel.

  The primary combustion chamber (21) of the combustion cylinder (20) includes a grid-shaped grate (28) in its inner lower part. The grate (28) is installed so as to be inclined downward from the fuel inlet side to the opposite side. The combustion air supply side of the primary combustion chamber 21 includes a damper 32 capable of adjusting the amount of air inside the air flow pipe 33.

A sliding door 29 is provided on the bottom of the casing 10 on the lower side of the primary combustion chamber 21 so that when the ash is burnt, the ash can be temporarily opened to discharge the ash out. Closed.

4, the heat absorbing portion 22 of the thermoelectric generator 50 in the present invention is located in the intermediate layer between the primary combustion chamber 21 and the secondary combustion chamber 23, And is fitted in a groove between the walls 25. The heat absorbing part outer wall member 22-1 is fastened by welding or bolt connection while a part of the outer peripheral surface of the heat absorbing part outer wall member 22-1 comes into contact with one side surface of the heat transfer opening and closing panel 51. [

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Fig. 6 shows the configuration of the thermoelectric generator 50. Fig.

In the present invention, the heat of the combustion cylinder 20 is absorbed by the inner wall 22-2 of the heat absorbing portion 22 and the outer wall body 22-1, the heat transfer opening and closing panel 51, the heat transfer fixing panel 52 The heat transfer diffusion panel 53 and the like. The heat transfer opening and closing panel 51 is installed so as to rotate at a predetermined angle together with the heat absorbing part 22 and the heat transfer fixing panel 52 is fixed to the heat transfer diffusing panel 53. The heat transfer opening and closing panel 51 and the heat transfer fixing panel 52 are coupled by a bolt and a spring device 58 so as to be in close contact with each other and spaced apart from each other by a predetermined distance. A thermal expansion type thermostat 60 is formed by forming a cylindrical hole so as to coincide with each other.

The heat transfer fixing panel 52 is connected to the heat transfer diffusion panel 53 by a welding or bolt coupling device.

The thermoelectric module 54 is positioned between the heat transfer diffusing panel 53 and the heat sink 55 and is fixed by the pressing force of the heat transfer diffusing panel 53 and the heat sink 55 by bolting.

 The thermoelectric module 54 is composed of a plurality of thermoelectric elements, which are interconnected in series and in parallel on an electric circuit to form one module as a whole.

The heat sink 55 of FIGS. 3 and 4 has a plurality of heat dissipating fins and is fixed to the partition wall 65.

In the partition wall 65 shown in Figs. 3 and 4, a rectangular hole having a size such that the thermoelectric module 54 does not interfere is formed.

A blower (57) is installed on one side of the heat sink (55).

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In the embodiment of the present invention, the fuel storage container 40 is partitioned by the partition wall 41 as shown in FIGS. 3 and 4 and is installed on the left side of the combustion cylinder 20. The fuel reservoir 40 is provided with a fuel supply screw 43 horizontally at the center of the inner bottom. The fuel supply screw 43 is connected to the combustion chamber 20 by a screw housing 44.

The fuel supply screw 43 includes a drive motor 45. Further, a back-flushing damper 46 is provided at the discharge port side of the end of the screw housing 44.

The fuel reservoir (40) is provided with a lid (47) on its upper side.

The automatic control device 70 of FIGS. 3 and 4 is installed apart from the fuel storage 40 and the combustion cylinder 20.

The automatic control device 70 has a configuration as shown in Fig. 8,

And is connected electrically to the thermoelectric module 54 and includes a constant voltage circuit 101, a charging circuit 102, a blower control device 104, a fuel supply control device 105, a rechargeable battery 103, An operation panel 71 having terminals, and the like.

The operation panel 71 is installed on one side of the main casing 11. [ The operation panel 71 includes a power ON-OFF switch, a blower rotation speed control volume, a screw drive motor timer setting volume, a charging module external device connection device, a display lamp, an alarm buzzer and the like. It is not shown separately in the drawing.

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The initial operation of the camping stove of the present invention begins by filling the fuel storage container 40 with pellet fuel and turning on the power switch of the operation panel 71. [ When the rechargeable battery 103 is not charged, the combustion air supply blower 57 and the fuel supply screw drive motor 45 are not operated. In this case, the fuel is manually injected into the upper portion of the combustion cylinder 20, Combustion can be started by opening the door 29 so that air is naturally supplied into the combustion cylinder 20 and then manually ignited.

When the temperature difference between the heating unit side and the cooling unit side of the thermoelectric module 54 is about 60 degrees Celsius or more as the combustion progresses in the initial combustion process, electricity of more than 5V is generated in the thermoelectric module and the blower 57 and the fuel The supply screw drive motor 45 is operated. The blower 57 supplies combustion air to the combustion chamber and at the same time absorbs air around the heat sink 55 to cool the heat sink 55.

When the blower 57 is operated, the reprocessing opening / closing door 29 is closed to prevent the outflow of the primary combustion air.

The combustion air supplied from the blower 57 flows through the flow pipes 33 and 34 → the primary combustion chamber flow pipe 33-1 and the secondary combustion chamber flow pipe 34-1 → the grate 20 and the air holes 30 ) To the combustion chamber. The air volume of the primary combustion air is regulated by the damper 32. And the total amount of air required for combustion can be adjusted by changing the rotational speed of the blower 57. [ Further, the air in the combustion flow pipe (33-1, 34-1) has a swirling force due to the shape of the air hole shown in Fig. 5, so that mixing with the incomplete combustion gas is promoted, thereby contributing to complete combustion.

In addition, the narrowed flame outlet 35 at the upper portion of the secondary combustion chamber 23 forms a static pressure while delaying the discharge of the combustion gas in the combustion cylinder 20, and the air having the swirling force is mixed with the incomplete combustion gas, The combustion efficiency is increased.

The fuel in the fuel storage container 40 is regulated by the timer setting of the automatic control panel 71 so that the screw drive motor 45 is repeatedly turned on and off at predetermined intervals to control the amount of fuel supplied to the combustion chamber. The one-time operation time setting of the screw drive motor 45 can be set in the internal circuit and no separate circuit is shown.

The thermoelectric generator 50 is heated by a path such as the heat absorber 22 → the heat transfer opening and closing panel 51 → the heat transfer fixing panel 52 → the heat transfer diffusion panel 53 → the thermoelectric module 54, Electricity is generated by the temperature difference on both surfaces of the thermoelectric element by the cooling function of the cooling section side heat sink 55 of the thermoelectric element module 54. [

In the embodiment of the present invention, the data relating to the technical characteristics of the thermoelectric elements were referred to the technical data of Ferrotec of Japan. For a device composed of 127 pairs of Ferrotec thermoelectric devices, the external shape is a 40 mm × 40 mm × 4 mm plate-type hexahedron, and the open electromotive force at no temperature difference at 1 ° C. is about 0.05 V (= 0.00039 V × 127 couples). When connecting the load, the electromotive force and the current value are

V = 0.05 - (Rm x I)

I = 0.05 / (Rm + RL)

(Rm: internal resistance, RL: load resistance, environmental temperature 0 to 150 ° C)

 Assuming Rm = 1.4 Ω RL (blower load) = 15 Ω temperature difference = 80 ° C. in the above embodiment, a load voltage of about 7.3 V and a current of about 0.487 A is generated in a series connection of two thermoelectric elements, A load voltage of about 7.3 V and a power of about 10 W is generated.

4 and 6, when the temperature exceeding a predetermined value is transferred to the thermoelectric module 54, the heat transfer opening and closing panel 51 is pushed away from the heat transfer fixing panel 52 by the operation of the thermostat 60, The transmission is temporarily stopped. 6, the heat transfer opening and closing panel 51 is rotated together with the heat absorbing portion 22 (or 22-1, 22-2) at a predetermined angle with respect to the combustion cylinder central axis 31-31, . When the temperature is further lowered, the thermally expandable thermostat 60 shrinks internally, and the heat transfer opening and closing panel 51 and the thermostat cylinder 61 are automatically returned by the springs 58 and 62 to continue the heat transfer again.

The thermostat 60 can be set to a certain operating temperature by adjusting the adjustment bolt 64.

When a temperature higher than the set temperature is supplied to the thermoelectric module due to a failure of the thermostat 60 or other causes, the bimetallic type overheat sensor 59 is activated to sound an alarm sound.

In the configuration of the automatic control device of Fig. 8,

The electricity generated in the thermoelectric module 54 has a voltage fluctuation depending on the temperature of the combustion chamber. Therefore, it is stabilized through the constant voltage circuit 101. Electricity with stable voltage drives the blower 57 through the blower control 104 and adjusts the rotational speed. Further, the screw drive motor 45 is driven through the fuel supply control 105 to perform ON-OFF control over time. The surplus electricity is stored in the rechargeable battery 103 through the charging circuit 102. The electricity of the rechargeable battery is again used for stable driving of the blower 57 and the screw drive motor 45, Can be used in equipment.

In the embodiment of the present invention, the electricity generated by the thermoelectric generator 50 can be supplied to the blower 57 and the screw driving motor 45 at about 5 V and 10 W, respectively. This can be applied to external devices that require electricity in the open air, and it can be stored in a rechargeable battery and used as an emergency power source.

When the operation of the camping stove according to the present invention is stopped, the power switch is turned off on the operation panel 71. However, even when the power switch is turned off, the thermoelectric module 54 and the blower 57 are connected to each other by the bypass circuit, so that the blower 57 continues to operate until the temperature of the combustion gas falls to a certain level, . It is not shown in the drawing.

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10 casing 11 body
12 Body cap
20 Communication 21 Primary combustion chamber
22 Heat absorbing part 22-1 Heat absorbing part outer wall body
22-2 Walls in the heat absorbing part 23 Secondary combustion chamber
24 Consolidated Outer Wall 25 Concrete Wall
26 Conveyance support 27 Conduit connection plate
28 Grate 29 Reprocessing door
30 air hole
31-31 Communication center shaft 32 Primary air control damper
33 Primary air flow pipe 33-1 Combustion flow primary air flow pipe
34 Secondary air flow pipe 34-1 Combustion flow Secondary air flow pipe
35 Flame outlet
40 fuel container 41 partition wall
43 Screw 44 Screw housing
45 Screw-driven motor 46 Anti-backlash damper
47 Fuel container lid
50 Thermoelectric generator 51 Heat transfer opening and closing panel
52 Heat Transfer Fixed Panel 53 Heat Diffusion Panel
54 Thermoelectric module 55 Heat sink
57 Blower 58 Spring and coupling bolts
59 Overtemperature sensor
60 Thermostat 61 Thermostat cylinder
62 spring 63 thermostat support
64 Control bolt 65 Partition wall
70 Automatic control unit 71 External control panel
80 Cookware base 81 Main body base
101 constant voltage circuit 102 charging circuit
103 Rechargeable battery 104 Blower control
105 fuel supply control

Claims (2)

A camping stove having a combustion-passing fuel storage heat transfer device and a charging device inside a casing in which an ammunition box is recycled,
Wherein the combustion chamber is divided into a primary combustion chamber, a heat absorption portion, and a secondary combustion chamber, and the combustion chamber is formed by stacking the primary and secondary combustion chambers. The primary and secondary combustion chambers form an air flow pipe with a double wall of the outer and inner walls Wherein the primary combustion chamber has an inclined grate and a plurality of air holes in the wall of the secondary combustion chamber, the heat absorber has an outer wall body of high thermal conductivity and an inner wall formed of a refractory material,
The fuel reservoir includes a fuel supply screw device having a divided space for storing the combustion material, and has a function of continuously and automatically supplying the fuel stored in the fuel reservoir to the communication pipe,
The thermoelectric device includes a thermoelectric module that generates electricity using heat of the combustion cylinder and temperature of the room temperature. The thermoelectric module drives the electric furnace combustion air supply blower and the fuel supply screw generated in the thermoelectric generator, And a heat transfer path for supplying heat to the thermoelectric module includes an opening / closing device for automatically interrupting heat transfer,
Wherein the charging device is charged with electric power generated by the thermoelectric generator to drive the blower and the screw device and supplies surplus electricity to the external electric device, and a camping stove using the thermoelectric generator . delete

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