STOVE-MOULD ASSEMBLY

FIELD OF INVENTION

[0001] The present invention relates to a stove-mould assembly, especially to a portable multi-core stove mold assembly for a rapid construction of a high-efficiency cooking stove. The present invention also provides a method for the construction of a multi-core cooking stove, using the stove-mould assembly of the present invention.

BACKGROUND OF INVENTION

[0002] A cooking stove, is normally constructed with a brick, mud, or cement, requires precise geometry and dimensional consistency, in its construction, which can be achieved only with special masonry skills and the desired composition of the raw materials, such as soil and cement. The aforementioned precise constructional skills are necessary to achieve the desired level of energy efficiency, especially when fire wood is used as a fuel. Generally, adoption and use of such stoves is fraught with limitations such as inefficient firewood consumption, thermal loss, incomplete combustion and an indoor smoke pollution.

OBJECTS OF THE PRESENT INVENTION
[0003] The primary object of the present invention is to provide a portable and multi-core stove-mould assembly, for rapidly constructing a high-efficiency cooking stove.

[0004] An object of the present invention is to provide a portable and multi-core stove-mould assembly with multiple energy extraction points.

[0005] Another object of the present invention is to provide a portable and multi- core stove-mould assembly, having an efficient wood-burning capacity.

[0006] It is also an object of the present invention is to provide a portable and multi-core stove-mould assembly, with dimensional accuracies and precise assembly configuration for constructing a high-efficiency cooking stove.

[0007] Yet another object of the present invention is to provide a portable and multi-core stove-mould assembly, for a high-efficiency cooking stove having features such as efficient firewood consumption, less thermal loss, complete combustion and without an indoor smoke pollution.

[0008] Still another object of the present invention is to provide a portable and multi-core stove mould assembly not involving the use of bricks for the construction of the stove.

BRIEF DESCRIPTION OF THE DRAWINGS

[0009] FIG. 1 depicts a perspective assembly view of portable and multi-core stove-mould assembly of the present invention.

[0010] FIG. 2 is an exploded perspective view of stove-mould assembly of the present invention.

[0011] FIG. 3 is a perspective assembly view of the bottom core of the stove-mould assembly of the present invention.

[0012] FIG. 4 is a perspective assembly view of the middle core of the stove-mould assembly of the present invention.

[0013] FIG. 5 is a perspective assembly view of the bottom core, middle core and top core of the stove-mould assembly of the present invention.

[0014] FIG. 6 is a perspective view of the dimension marker of the stove-mould of the present invention.

[0015] FIG. 7 is a perspective view of the base-profile of the bottom core of the stove-mould of the present invention.

[0016] FIG. 8 is a perspective view of the profile of stove mould assembly of the present invention.

[0017] FIGS. 9 & 10 depict perspective views of cooking vessel top plate moulds.

SUMMARY OF THE INVENTION

[0018] The present invention provides a portable multi-core stove mold assembly with multiple energy extraction points for mounting on surface includes a bottom core with detachable retaining walls forming a bed, a middle core with detachable retaining walls, mounted on the bottom core, and a top core with detachable vertical retaining walls mounted on the middle core. The present invention also provides a method for constructing a portable multi-core stove mold assembly on a surface.

DESCRIPTION OF THE INVENTION

[0019] The present invention provides a portable and multi-core stove-mould assembly, for rapidly constructing a high-efficiency cooking stove. The description is made by referring to the accompanied drawings FIGS. 1-10. The stove-mould assembly as shown in drawings includes a bottom core or core BT arranged on a surface, a middle core MT and top core TT with a chimney 13. The bottom core BT is also provided with a fire wood compartment 16. The surface is chosen at a place where the stove is to be constructed and it is preferably a corner portion of the place supported by walls or other supporting structures.

[0020] Now specifically referring to FIG. 2, the bottom core BT is provided with outer vertical retaining walls 1 that are spatially arranged, with intervening spaces, on a plane longitudinal to the long axis LA of the bottom core BT. An outer vertical retaining wall 3 is detachably connected to distal ends of the vertical retaining walls 1 on a plane perpendicular to the long axis LA of the bottom core BT. The combination of these outer vertical retaining walls 1 and 3 with intervening spaces, provide an external contour or dimensions to the stove-mould assembly. The combination of these vertical retaining walls 1 and 3 with intervening spaces, provide an external contour or dimensions to the stove-mould assembly. The bottom core BT is also provided with inner vertical retaining walls 2 that are spatially arranged in between the outer vertical retaining walls 1, with intervening spaces, on a plane longitudinal to the long axis LA of the bottom core BT. The arrangement of the inner vertical retaining walls 2, which are positioned on the long axis LA of the bottom core BT, tapers towards the outer vertical retaining walls 3 and connected with one another by means of a back slider 4. The outer surfaces of the inner vertical retaining walls 2 are provided with surficial protrusions 5, having exemplary semi¬circular shapes to act as cavities for multiple-energy extraction points. As an exemplary embodiment, three energy extraction points for holding three cooking/heating vessels are provided. The total number of energy extraction points can be suitably varied depending on user requirements. The first two vessels are used for the cooking and the third vessel is called as the 'heat recovery vessel'. The first cooking vessel is directly above the flames of the firewood and attains the maximum temperature. The second vessel is close to the firewood and attains the second highest temperature. The heat reaches to the vessel by the convective heat flow through air. The third vessel, which is a heat recovery vessel, is intended to extract as much of the heat getting exhausted from flue gases. The inner vertical retaining walls 2 are collapsible and arranged to be removed easily during the course of the construction of the stove. An ash collector 6 is detachably arranged to pass through the openings 7 provided on the walls of the outer vertical retaining walls 1 and inner vertical retaining walls 2, to facilitate collection of ash from the stove and its disposal. The ash collector 6 can be detachably arranged on any of the outer vertical retaining walls 1. Spacers 9 are arranged at proximal ends of the inner and outer vertical retaining walls 1 and 2 and positioned between the outer and inner vertical retaining walls 1 and 2, respectively, to provide a spatial retaining support. The spacers 9 are arranged to
maintain the relative positions of the outer and inner vertical retaining walls 1 and 2. A proximal slider number 8 is detachably arranged between the inner vertical retaining walls 2. Spacers 10 are arranged on top of the outer and inner vertical retaining walls 1 and 2 of the bottom core BT. The outer and inner vertical retaining walls 1 and 2 and the outer vertical retaining walls 3 are fastened in a manner to facilitate an easy dismantling and separation subsequent to the construction of the stove-mold. The bottom core BT forms a cavity to facilitate the filling of stove-construction material that can provide thermal stability and which can be a combination of sand, clay, soil, cement and other suitable materials, which are rammed into the cavity of the bottom core BT. The outer and inner vertical retaining walls 1 and 2 are made of wooden material, and the these retaining walls can also be made from any other suitable materials such as steel, iron, metallic alloys, cement or any other suitable material that can provide the desired retaining strength hold and maintain the mould. A bed for the bottom core BT is arranged extending from the proximal and distal ends of the inner and outer vertical retaining walls 1 and 2, with
gradual elevation of the bed as shown in FIG. 7, by using dimension marker 16 as shown in FIG.6. The spatial arrangement and bed between the inner vertical retaining walls 2 is provided with a suitable profile by using a dimension marker 16. The profile of the bed is maintained to achieve the thermal performance of the stove. In this embodiment the retaining walls 1,2 and 3 and sliders are connected by means of connectors such as screws, latches, hinges, rivets, press-fit mechanism, glue-fit mechanism or any other means by which these walls can be joined and removed with ease.

[0021] A middle core MT is arranged over the distal ends of the outer and inner vertical retaining walls 1 and 2. The middle core MT is used to construct an enclosure for the heat recovery vessel. The middle core MT is provided with outer vertical retaining walls 11 that are connected by means of connectors to form a cavity. In this exemplary embodiment the shape of the cavity is shown as substantially rectangular and any other suitable shapes can also be used to form the desired cavity. Inner vertical retaining walls 12 are connected with each other to form a corresponding cavity among them. The inner vertical retaining walls 12 are connected with a hinge arrangement to facilitate an easy removal. It is within the scope of the invention to use any other connectors such as screws, latches, hinges, rivets, press-fit mechanism, glue-fit mechanism or any other means by which these walls can be joined and removed with ease. The outer and inner vertical retaining walls 11 and 12 are separated by spacers to form an intervening circumferential space or cavity. The space or cavity is used to fill the rammed material in the process of creating the mould.

[0022] A top core TT is arranged over the middle core MT to act as an enclosure for the chimney 13.
The chimney 13 is enclosed in the top core TT

[0023] The mould having bottom core BT is assembled at a site where the stove is to be built and a mixture of sieved soil, sieved sand and cement is rammed into the cavity of the bottom core BT. The soil composition as used for the for stove construction of the present invention comprises, sand in the range of 60-70%, clay in the range of 14-18%, silt in the range of 10-25% and any other suitable material that can be used as mortar and having the property of hydraulicity such as cement, in the range of 7-8%.

[0024] On completion of the filling of the cavity by the mixture and attaining the outer mould the spacers 10 are removed. Thereafter, proximal slider member 8 is removed to remove the inner vertical retaining walls 2. The connecting elements between the inner and outer retaining walls 1 and 2 are removed to remove the inner vertical retaining walls 2. The bed and the intervening space between the inner retaining verticals 2 of the bottom core BT, is suitably profiled using the dimension marker 16. The ash collector 6 is removed at this juncture.

[0025] The middle core MT is now mounted on the distal end of the bottom core BT and filled with the material mixture. Once the mixture is filled in the retaining walls of the middle core are removed. The opening of the middle core has to be covered with a recovery vessel top-plate, which is facilitated using a separate mold. The recovery vessel top-plate has an opening for locating a chimney pipe. The top-plates, in exemplary manner are as shown in FIGs. 9 & 10.

[0026] The top core TT is mounted on the middle core MT to facilitate the mounting of the chimney 13 along with the filling of the mixture. Once the mixture is filled and formed the top core TT is removed.

[0027] After removal of the top core TT, the retaining walls of the middle core MT and lower-core LT are to be removed to complete the ramming of the stove. After the completion of the ramming procedure the stove is completed by placing the cooking vessel top plate and firewood compartment door 14.

[0028] Once the stove-mould is formed and is ready for use. The profile of the constructed stove-assembly is as shown in FIG. 8. Fuel in the form of fire wood is used at the proximal end of the stove. Cooking vessels are mounted on the respective flame extraction points 15. The cooking vessels are placed directly above the flames of the firewood and attain the maximum temperature. The heat transfer is through conduction, radiation and predominantly by convection. The heat recovery vessel recovers heat from the flue gases before it is released through the chimney 13.

[0029] A heat recovery vessel in mounted on the middle core MT and in close proximity to the chimney 13.

ADVANTAGES
[0030] The stove-mould satisfies the requirements of consistent dimensions and geometrical symmetry in order to secure the energy-efficiency.

[0031] Elimination of smoke inside the premises while the stove is burning

[0032] Saves construction time of the stove-mold assembly.

[0033] Reduction in Material cost (negligible use of conventional materials)

[0034] Reduction in the labour cost as highly skilled mason is not required, since the construction can be performed by any unskilled person by achieving the dimensional and structural stability.

[0035] Single stove mold is sufficient for constructing stove in various cooking
area layouts, considering different locations for the ash collection trays and chimney.

We claim:

1. A portable multi-core stove mold assembly for mounting on surface, comprising:
a bottom core defined by a plurality of interconnected outer and inner vertical retaining walls having proximal and distal ends and positioned to provide a bed on a plane longitudinal to long axis of the bottom core;

a middle core defined by a plurality of interconnected vertical retaining walls, mounted on the distal end of the bottom core; and

a top core defined by a plurality of interconnected vertical retaining walls, mounted on the distal end of the middle core.

2. The stove mold assembly according to claim 1, wherein a dimension marker is disposed on the bed, wherein said dimension marker renders an inclination to the bed from its distal end to the proximal end.

3. The stove mold assembly according to claim 1, wherein spacers are disposed in the intervening spaces of the vertical retaining walls of the bottom portion.

4. The stove mold assembly according to claim 1, wherein a plurality of energy extraction points with plates disposed on said inner vertical retaining walls of the bottom core.

5. The stove mold assembly according to claim 1, wherein the bottom, middle and top portions are detachable.

6. The stove mold assembly according to claim 1, wherein and a heat recovery enclosure is with a plate disposed on the middle core.

7. The stove mold assembly according to claim 1, wherein a chimney enclosure is disposed on the top core.

8. The stove as claimed in claim 1, wherein an ash collector enclosure is connected to the vertical retaining wall of the bottom portion.

9. A method for constructing a portable multi-core stove mold assembly on a surface, said method comprising the steps of:

assembling and filling a bottom core with a filler material, wherein the bottom core is defined by a plurality of interconnected outer and inner vertical retaining walls having energy extraction points, spacers, sliders and ash collector and positioned to provide a bed on a plane longitudinal to long axis of the bottom core;

removing the spacers, sliders and vertical retaining walls;

profiling the bed with a dimension marker and removing the ash collector;

mounting the middle core on the distal end of the bottom portion and filling the middle core with a filler material, wherein said middle core having a plurality of vertical retaining walls and a heat recovery enclosure;

removing the vertical retaining walls of the middle core and covering the middle core with a recovery vessel plate;

mounting a top core on the distal end of the middle core, having a plurality of vertical retaining walls and a chimney, and filling the top core with filler material; and

removing the top core and providing plates for energy extraction points. 10. The method according to claim 9, wherein the filler material comprises:

sand in the range of 60-70%, clay in the range of 14-18%, silt in the range of 10-25% and cement in the range of 7-8%.