Abstract:
The present invention provides a windproof stove, which has practical application in resisting lateral airflow, and includes a plurality of foot rests distributed in an encircling configuration to form a stove body. An encircling ring is suspended interior of the foot rests, and a combustion device is located interior of the encircling ring. An annular air port is formed between a periphery of the combustion device and the encircling ring, and a surface of the encircling ring is used to block lateral airflow.

Description:
BACKGROUND OF THE INVENTION 
       [0001]    (a) Field of the Invention 
         [0002]    The present invention relates to a windproof stove, and more particularly to a windproof stove able to achieve effectiveness of resisting lateral wind pressure. 
         [0003]    (b) Description of the Prior Art 
         [0004]    With reference to stove units that use flames to heat and cause combustion, sufficient air must be available to satisfy the requirements to cause a vigorous oxidation reaction. However, because an air mixture of specific ratio must be supplied, thus, the combustion assembly of the stove units must be configured with an emerging or protruding upper end opening. In general, if gas cooking devices or liquid fuel stove units, such as spirit stoves, gas stoves, and the like, are used in a location where the surrounding airflow is relatively strong, then lateral wind pressure inevitably blows out the flames of the fire hole or disturbs operating line of the flames. 
         [0005]    Referring to  FIG. 1 , which shows heating operation of a pot  100  disposed on top of a stove unit  1 , and a ring-shaped plate grid  10  is constructed at a periphery of the stove unit  1  in order to resist lateral airflow. However, such a structure is inconvenient to carry, and a bottom portion of the plate grid  10  intercepts and seals off airflow from entering the stove unit  1 , thereby disabling the stove unit  1  from ensuring effective combustion. Even if an air port is defined in a lower portion of the plate grid  10 , then air will pass directly through the air port and attack flames of the stove unit  1 . 
       SUMMARY OF THE INVENTION 
       [0006]    Accordingly, a primary objective of the present invention is to provide a windproof stove that particularly uses an encircling ring configured at position of the combustion chamber relative to an upper end surface of a combustion device to serve as a lateral containment. Moreover, an annular air port is configured between the encircling ring and the combustion device, and is used to enable airflow to enter therethrough, thereby enabling the stove to obtain sufficient oxygen during the process of combustion. 
         [0007]    Another objective of the present invention is to provide the windproof stove with an upper and a lower encircling ring having diameters of different size to enable another annular air port to be formed by the interspace between the mutually sleeved upper and lower encircling rings, thereby providing sufficient oxygen to propagate substantially longer flames and contain flame tips. 
         [0008]    A third objective of the present invention is to provide the windproof stove that enables the encircling rings directly supported by support bars extending from foot rests, and mechanical force of the encircling rings enables assemblage of the foot rests. 
         [0009]    A fourth objective of the present invention is to provide the windproof stove that enables expansion of feet of a stove body, moreover, the stove body can be inverted for use thereof. 
         [0010]    A fifth objective of the present invention is to provide the windproof stove that enables height adjustment between the encircling rings and the joined support bars. 
         [0011]    A sixth objective of the present invention is to provide the windproof stove wherein end openings of the crossover of the encircling rings are respectively configured valve plates. 
         [0012]    To enable a further understanding of said objectives and the technological methods of the invention herein, brief description of the drawings is provided below followed by detailed description of the preferred embodiments. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0013]      FIG. 1  shows a schematic view of a windproof method of prior art. 
           [0014]      FIG. 2  shows a side view of an assemblage according to the present invention. 
           [0015]      FIG. 3  shows a schematic view of a further embodiment according to the present invention. 
           [0016]      FIG. 4  shows a schematic view of another structure of a stove body according to the present invention. 
           [0017]      FIG. 5  shows a schematic view of a further embodiment of upper and lower encircling rings according to the present invention. 
           [0018]      FIG. 6  shows a schematic view of foot rests in contact with the ground according to the present invention. 
           [0019]      FIG. 7  shows an application drawing of an inversion of  FIG. 6  according to the present invention. 
       
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
       [0020]    Referring to  FIG. 2 , which shows the present invention primarily structured to comprise a plurality of foot rests  3  radially distributed in an encircling configuration to form a stove body  2 . An upper end of each of the foot rests  3  is joined to a grate  31 , and a lower end is joined to a foot  32 . Interior of the stove body  2  is joined to an encircling ring  4  using a suspension method, and an interior of the encircling ring  4  enables disposition of a combustion device  22  therein. A lower end of the entire structure is provided with a base plate  21  that is able to support the weight of the entire structure and receive drips from cooking, thereby preventing staining a tabletop and enabling increasing area of contact with the ground, in addition to providing a thermal insulation effect. 
         [0021]    An annular air port  40  is formed between a periphery  220  of the combustion device  22  and an inner edge of the encircling ring  4 . Flames are produced at an upper end surface  222  of the combustion device  22 , and the upper end surface  222  is positioned within the range of the height of the encircling ring  4  close to a center position, thereby enabling the encircling ring  4  to contain flames produced and resist lateral airflow. 
         [0022]    Oxygen required for combustion enters through the annular air port  40 , bringing about an exchange at position of the upper end surface  222 , whereupon vigorous oxidation takes place that produces thermal energy. Based on the configuration of the present invention, lateral strong wind is unable to directly attack the flames of the combustion device  22 , thereby enabling the flames to maintain normal thermal work. 
         [0023]    Blocking of lateral airflow passing through the encircling ring  4  forms a vertical angle resistance, and the surface of the encircling ring  4  disperses the pressure flow line of the lateral airflow. After disintegration velocity of flow is reduced, at which time a portion of the airflow enters through the annular air port  40 , and a portion transversally brushes past between a bottom portion of the pot  100  and an end opening  42  of the encircling ring  4 . The transversal airflow at the bottom portion of the pot  100  forms a back pressure effect within the encircling ring  4 , thereby increasing recharge of rate of airflow at the bottom end of the annular air port  40 . However, the rapid recharge of rate of airflow does not affect normal combustion at the upper end surface  222 . By use of such basic conditions, the present invention is able to achieve implementation of a lateral windproof stove unit. 
         [0024]    The combustion device  22  is positioned interior of the encircling ring  4 , thereby enabling the periphery  220  of the combustion device  22  to receive support from support bars  321  extending from a bottom portion. The supporting method further uses supportive bars  322  extending from the support bars  321  or enable detaining of the periphery  220  of the combustion device  22  or shouldering of a lip  221  of the combustion device  22 , thereby causing the combustion device  22  to be in a suspending state, and enabling the bottom portion of the combustion device  22  not to come in contact with the ground. 
         [0025]    A movable fixed method can also be formed between the supportive bars  322  and the periphery  220  of the combustion device  22 , thereby enabling adjusting vertical displacement the combustion device  22  relative to distance to the bottom portion of the pot  100 . 
         [0026]    The encircling ring  4  is fixedly supported by the support bars  321  extending from the bottom portion, or a movable fixed method can be used to support and fix position of the encircling ring  4 , thereby enabling adjusting height of the encircling ring  4  to a horizontal L 1  or L 2  position, and thus realize functionality to alter distance relative to the bottom portion of the pot  100 , or to enable use of the combustion device  22  at different heights whereby adjustment of position of the upper end surface  222  is realized. 
         [0027]    Relative position of the end opening  42  of the encircling ring  4  primarily enables the encircling ring  4  to maintain an appropriate relative height position above the upper end surface  222  of the combustion device  22 , thereby enabling containment of flames and adjustment relative to the bottom portion of the pot  100 . In order to accommodate different sizes of the pot  100 , oblique height of the grate  31  can be correspondingly changed to an appropriate difference in height position to the bottom portion of the pot  100 . 
         [0028]    Height H of the adjustable height of the encircling ring  4  is according to that supported by length of the support bars  321 . 
         [0029]    When using the present invention outdoors or on the ground, then the feet  32  can be placed directly on the ground to support the stove body  2 , thereby eliminating the need for the base plate  21 . 
         [0030]    The combustion device  22  supports use of canned fuel or a “fire bowl” or other solid fuel, wherein if canned fuel or a fire bowl is used, then the interior fuel can be liquid fuel, such as alcohol or solid alcohol, or hot meltable solid fuel, such as wax fuel, oil fuel, and the like. 
         [0031]    Conditions for implementation of the combustion device  22  are that it is able to be disposed within the encircling ring  4  or able to be shouldered and supported by the support bars  321 . 
         [0032]    Referring to  FIG. 3 , which shows the stove body  2  structured from the plurality of foot rests  3  radially distributed in an encircling configuration, interior of which is configured at least one encircling ring  4  which contains the combustion device  22 . The annular air port  40 , which enables the supply of oxygen, is formed between the combustion device  22  and an inner surface of the encircling ring  4 . If the flames of the combustion device  22  are relatively long, then in order to similarly contain tips of the flames and supply adequate oxygen to the tips, then an upper encircling ring  5  of relatively larger diameter can be coaxially sleeved on top of the encircling ring  4 . Moreover, because diameter of the upper encircling ring  5  is relatively larger, thus, another annular air port  50  is formed by the interspace between the mutually sleeved upper and lower encircling rings  4 ,  5 , thereby enabling the two annular air ports  40 ,  50  to synchronously allow air to enter and be supplied therethrough. 
         [0033]    The upper encircling ring  4  and the lower encircling ring  5  are respectively fixedly supported by the foot rests  3 , or other supporting member methods can be adopted to provide fixing thereof. Height of the combustion device  22  can be similarly adjusted, and height position of the lower encircling ring  4  can be correspondingly adjusted. 
         [0034]    The foot rests  3  are formed from bars  30 , an upper portion of each of which is joined to the grate  31 , and lower portions form the feet  32 . Peripheral hoops  23  between the foot rests  3  are used to bind the foot rests  3 , or structural capacity of the upper and lower encircling rings  4 ,  5  can be directly used to bind the foot rests  3 , thereby structuring the stove body  2 . 
         [0035]    Referring to  FIG. 4 , which shows the stove body  2  structured from the plurality of foot rests  3 , wherein each of the foot rest  3  are formed by bending wire bars, such as metal wire; upper ends of the bars  30  are bent to form the grate  31 , and the lower ends are bent to form the feet  32 , and the entire structure is supported by the base plate  21 . The feet  32  of the lower ends inwardly extend to form the support bars  321 , which are used to fix the lower encircling ring  4 , and the upper encircling ring  5  is fixedly supported by support bars  311  extending from the grate  31 . 
         [0036]    The support bars  321  extending from the feet  32  are able to correspondingly fix position of the combustion device  22 . The annular air port  40  is formed between the combustion device  22  and the encircling ring  4 , and the other annular air port  50  is formed by the interspace between the encircling ring  4  and the inner surface of the upper encircling ring  5 . 
         [0037]    A movable fixed functional cooperation can be similarly formed between the aforementioned upper and lower encircling rings  4 ,  5  and the support bars  311 ,  321  to enable adjusting height position thereof. 
         [0038]    The encircling rings  4 ,  5  of the plurality of foot rests  3  can serve as a mechanical force assemblage support, and the binding provided by the hoops  23  is used to form the solid stove body  2 . 
         [0039]    Referring to  FIG. 5 , which shows implementation of the aforementioned upper and lower encircling rings  4 ,  5 , height position of each of which can be adjusted, and relative end openings of the upper and lower encircling rings  4 ,  5  are respectively configured with mutually corresponding valve plates  41 ,  51 . Mutual spacing between the valve plates  41 ,  51  forms a curved flow path A 1 , thereby enabling air A to pass therethrough in a snake-like fashion, and drawing out or drawing in of the upper and lower encircling rings  4 ,  5  enables modifying cross-sectional area of the through hole of the curved flow path A 1 , thereby enabling adjusting airflow rate of the annular air port  50 . 
         [0040]    The valve plates  41 ,  51  can be configured with airflow auxiliary holes  410 ,  510  respectively, thereby assisting air flow into the upper end surface  222  of the combustion device  22 . Moreover, movable fixing of the encircling rings  4 ,  5  enables counterrotating thereof, and use of counterrotating of the encircling rings  4 ,  5  enables modifying relative positions of the auxiliary holes  410 ,  510 . Furthermore, the auxiliary holes  410 ,  510  are configured at equal angular positions, thereby allowing the upper and lower auxiliary holes  410 ,  510  to overlap and form through holes, or the upper and lower auxiliary holes  410 ,  510  can be closed over by adjusting to mutual corresponding angular positions, thereby achieving functionality to form an enclosed assembled single encircling ring between the upper and lower encircling rings  4 ,  5 . 
         [0041]    Referring to  FIG. 6 , which shows the foot rests  3  structured to form the stove body  2 , wherein the feet  32  are expanded to increase area of contact with the ground, thereby enabling a substantially larger placement range of center of gravity. Interior of the stove body  2  similarly enables loading of the combustion device  22 , and in order to strengthen peripheral structural capacity of the stove body  2 , the hoops  23  are used to bind the combustion device  22 . The upper and lower encircling rings  5 ,  4  interior of the stove body  2  are similarly joined and suspended interior of the stove body  2  like the aforementioned windproof stove assemblage method. The foot rests  3  are formed by the bars  30 , and upper ends of the foot rests  3  are bent to form the grate  31 , and the lower ends are bent to form the feet  32 . 
         [0042]    Referring to  FIG. 7 , wherein an inversion of the stove body  2  of the embodiment depicted in  FIG. 6  is adopted to accommodate the mechanical condition of bearing the weight of the pot  100 , whereby the feet  32  face upward and the grate  31  is in contact with the ground, thereby enabling the stove body  2  to bear the weight of a large-sized pot  100  disposed thereon. The lip  221  of the combustion device  22  is used to shoulder the supportive bars  322  of the support bars  321  to form a suspending state, and air is supplied by simply entering through the annular air port  40 . The other encircling ring  5  serves as a supplementary measure to block lateral wind pressure, and lateral air is able to enter through the annular air port  50  or from a lower end of the encircling ring  5  to supplement the supply of air. 
         [0043]    It is of course to be understood that the embodiments described herein are merely illustrative of the principles of the invention and that a wide variety of modifications thereto may be effected by persons skilled in the art without departing from the spirit and scope of the invention as set forth in the following claims.