rocket stove

Abstract

The invention relates to a rocket stove (R) with a chimney (1), wherein the chimney (1) has a heat outlet (32) at one end and a mounting area (15) at the other end, wherein a fuel supply (2) is provided and in the operating position the fuel supply (2) is arranged at an angle to the chimney (1), wherein a fire grate (5) is arranged in a chimney interior, wherein the fire grate (5) is arranged between the fuel supply (2) and the mounting area (15), wherein an ash drawer (4) is arranged between the fire grate (5) and the mounting area (15), wherein the fire grate (5) has a heat shield (8) on the other side of the ash drawer (4).

Description

Technical field

[0001] The invention relates to a rocket furnace according to the preamble of claim 1. State of the art

[0002] Such rocket stoves are already known and in use in a variety of forms and designs. For example, a collapsible rocket stove is disclosed in US patent D878,137 S.

[0003] Reference is also made to CN 110966622 A and CN 205316392 U, which have a k-shape in their construction. However, these types of rocket stoves are prone to rapid material fatigue in the area exposed to the highest temperatures during wood combustion, which significantly reduces their lifespan.

[0004] Furthermore, CN 210425110 U discloses a rocket stove, which again consists of a double-chamber design. The outer chamber is decoupled from the inner chamber, which is exposed to higher temperatures. Inside, a wood feed, the combustion chamber, and the chimney form a single unit, which is additionally enclosed by a spaced outer casing. A disadvantage here, however, is that the increased use of material results in greater weight and makes simple disassembly for transport more difficult. Object of the invention

[0005] The object of the present invention is to overcome the disadvantages of the prior art. In particular, it aims to provide a rocket furnace that is durable and easy to handle, transport, and operate. Solution to the task

[0006] The features according to claim 1 lead to the solution of the problem.

[0007] Advantageous embodiments are described in the dependent claims.

[0008] A rocket stove according to the invention has a chimney, the chimney having a heat outlet at one end and a mounting area at the other. The chimney primarily has a round tube shape or a polygonal channel shape. The heat outlet can be designed, for example, as a cooking area, grill, or simple fire outlet.

[0009] Additionally, a fuel supply is provided. In the operating position, the fuel supply is angled towards the chimney. This angled arrangement is designed so that, for example, wood in the fuel supply slides into the chimney by gravity.

[0010] Inside the fireplace's firebox is a grate. The grate has ash vents. As the wood slides into the fireplace via the fuel feed, it burns on the grate, releasing heat energy that rises to the flue outlet. The resulting ash then falls through the ash vents into an ash pan, an ash drawer, or simply onto the floor. If an ash drawer or ash pan is used, it is located between the grate and the floor. An ash drawer is a removable tray for emptying the ash. An ash pan, on the other hand, is simply a recessed base.

[0011] In this context, the fire grate is arranged between the fuel supply and the installation area, with the ash drawer or ash trap being arranged between the fire grate and the installation area.

[0012] According to the invention, the rocket stove has a heat shield arranged on the fire grate (5) on the other side of the installation area.

[0013] Depending on the embodiment and if an ash drawer or ash trap is present, the heat shield is arranged on the other side of the ash drawer, wherein the heat shield in its installed position has a basket shape together with the fire grate, the fire grate forming the bottom of the basket.

[0014] In another embodiment, the heat shield can be arranged reversibly and interchangeably in the chimney. This allows it to be removed and replaced when worn.

[0015] The highest temperatures occur in the area of ​​the fire grate during combustion, specifically on the side facing the heat outlet. Chimney walls are generally designed to be as thin as possible to save material, weight, and costs. However, this has the disadvantage that the walls, as designed according to current technology, are damaged by the repeated combustion heat and eventually cease to function properly.

[0016] The heat shield according to the invention extends the service life of the walls and thus of the chimney and therefore also of the entire rocket stove. For this purpose, the heat shield is brought into contact with the fire grate, thereby reinforcing the chimney walls. The fact that the heat shield is reversible and replaceable further extends its service life, as it can be replaced at certain intervals to extend its functionality.

[0017] The working position, as defined in the invention, is that the rocket stove is assembled and ready for use. The transport position, as defined in the invention, is that the rocket stove is disassembled and ready for transport.

[0018] The heat shield preferably consists of a base ring, the base ring having a circumferential heat shield air inlet. In the operating position, the heat shield rests on the fire grate with the base ring and is open towards the fuel supply, while also having protective walls against the chimney walls. Additionally, the heat shield has a circumferential recess. In a preferred embodiment, the recess is located in the end region of the protective walls facing away from the base ring. In this embodiment, the recess is formed by a beveled edge on the protective walls, so that in the operating position, it achieves a distance from the chimney walls.

[0019] The base ring is designed to run all the way around, providing a stabilizing effect. The heat shield's air intake consists of openings in the base ring, allowing air to enter the heat shield during operation, ensuring efficient combustion of the wood. The base ring is designed to run all the way around. The protective walls, however, are only positioned where they do not obstruct the flow of wood as it slides from the fuel feed onto the grate during operation. These openings are located within the protective walls.

[0020] The ash drawer is easily removable when full of ash or after cooking. During operation, the ash drawer also features an air intake. This air intake consists of openings integrated into the drawer's front panel.

[0021] Additionally, an air intake for the fire grate is integrated between the grate and the fuel supply. These are also ventilation openings embedded in the chimney.

[0022] A gap is created between the heat shield air intake and the grate air intake, with the heat shield intake being positioned closer to the grate than the grate intake when in operation. This creates a desirable and beneficial airflow, achieved through the ventilation slots of the grate and heat shield intake being arranged at different heights. Furthermore, embers and sparks from the heat shield cannot escape because the grate intake is positioned higher. It is also advantageous if the ventilation slots of the heat shield intake have a larger opening than those of the grate intake. This further enhances the desired airflow for the combustion process.The term "heat protection air intake" in the working position is located closer to the fire grate than the fire grate's air intake is to be defined as follows: in the working position, the fireplace is positioned on a level surface within its installation area. Therefore, the fire grate is the component closest to the surface. In the working position, from the surface towards the heat outlet, the ventilation slots for the heat protection air intake are located after the fire grate, followed by the ventilation slots for the fire grate's air intake.

[0023] The chimney has a fuel inlet, the edge of which facing the heat outlet features a recess for pre-adjustment. A locking tab for the fuel feeder can be engaged in this recess. The fuel inlet is shaped and sized to match the fuel feeder. The fuel feeder is slightly larger, allowing it to wrap around the chimney. This also facilitates transport. The fuel inlet is an opening on one wall of the chimney. In the working position, the fuel inlet is closed by the fuel feeder. To simplify assembly, the locking tab of the fuel feeder is hooked into the recess in the chimney. The fuel feeder is then pivoted around the locking tab towards the chimney and subsequently secured to the chimney.The releasable fixing can be achieved in such a way that the fuel supply is releasably connected to the chimney by means of a fuel supply wing screw.

[0024] In this context, the fuel supply has, on the one hand, a fuel supply flap and, on the other hand, an opening that leads into the fuel access when in the working position.

[0025] Additionally, the fuel supply flap has a sliding control for adjusting a ventilation control, with the fuel supply flap being hinged to the fuel supply.

[0026] In one embodiment, the heat outlet comprises a cooking or grilling area, or some other method of utilizing heat or displaying a flame. The cooking area, for example, consists of two interlocking struts that can be releasably inserted into slots in the chimney, the slots being located at the other end of the installation area.

[0027] In addition to the installation area, one or more feet can be detachably connected to the fireplace within the installation area using one or more wing nuts. This increases the stability of the fireplace on the ground, which is particularly important for safe operation when in use.

[0028] The transport position is defined by the fact that the detached stand, the detached foot wing screw, and, if present, the detached and disassembled cooktop and the fuel feed wing screw are stored loosely in the chimney, and the fuel feed is attached to the chimney at the other end of the installation area. Depending on the design, the ash drawer, the ash catcher, or just the fire grate then closes the chimney at one end and the attached fuel feed at the other.

[0029] In transport position, the rocket stove can then be picked up and transported in the transport bag using a carrying strap. Character description

[0030] Further advantages, features and details of the invention will become apparent from the following description of preferred embodiments and from the drawings; these show in: Fig. 1 A rocket furnace R according to the invention shown in working position in a view from an oblique angle above; Fig. 2 the Fig. 1 in a partial exploded view; Fig. 3 a partially cutaway view of the Fig. 1; Fig. 4 an enlarged partial view of the Fig. 3 from a different perspective; Fig. 5 a rocket furnace R in transport position; Fig. 6. the rocket stove R, which is in a transport bag, from the Fig. 5. Example of implementation

[0031] In Fig. Figure 1 shows a rocket furnace R in its operating position.

[0032] The rocket stove R consists of a chimney 1, wherein the chimney 1 has a heat outlet 32 ​​at one end, the heat outlet 32 ​​comprising a cooking area 3 in this embodiment. At the other end, the chimney 1 has a mounting area 15.

[0033] A fuel supply 2 is present. In the working position shown here, the fuel supply 2 is arranged at an angle to the chimney 1. This creates a Y-shape in the side view of the chimney 1 and the fuel supply 2, with one longitudinal edge of the Y forming a long straight line and the second longitudinal edge arranged at an angle to the long straight line.

[0034] A fire grate 5 is arranged inside a fireplace. The position of the fire grate 5 can be identified by the insertion tabs of the fire grate 5, which extend through the chimney 1 and into Fig. 1 are visible accordingly.

[0035] The fire grate 5 is arranged between the fuel supply 2 and the installation area 15, wherein an ash drawer 4 or an ash trap is arranged between the fire grate 5 and the installation area 15 in this embodiment.

[0036] In this particular embodiment, the ash drawer 4 has an optional ash drawer air inlet 22 on its front panel or access flap. In this embodiment, the ash drawer air inlet 22 consists of rectangular openings.

[0037] A fire grate air inlet 6 is also shown on the chimney 1 between the fire grate 5 and the fuel supply 2. The fire grate air inlet 6 is integrated as ventilation slots in the walls of the chimney 1.

[0038] The fuel supply 2 has, on one side, a fuel supply flap 7 and, on the other side, an opening that, in the operating position, leads into a fuel inlet 10. The fuel inlet 10 is more clearly visible in the following figures and is described and mentioned separately there.

[0039] The fuel supply flap 7 has a slider 12 for adjusting a ventilation regulator 13. The fuel supply flap 7 is hinged to the fuel supply 2 by means of a hinge 14. This allows the fuel supply flap 7 to be opened and closed to introduce, for example, wood or other fuel such as coal into the fuel supply 2. The amount of air supplied to the rocket stove can be adjusted by closing or opening the ventilation regulator 2 using the slider 12.

[0040] Furthermore, on the opposite side to the fuel supply 2 on the chimney 1, there is a carrying handle 16.

[0041] It can also be seen that the fuel supply 2 is releasably connected to the chimney 1 by means of a fuel supply wing screw 21.

[0042] In the lower area, i.e., in the working position shown here, two support feet 17.1, 17.2 are attached by means of two foot wing screws 18.1, 18.2 each (see also Fig. 2) releasably connected to the chimney 1 in the area of ​​the installation area 15.

[0043] In Fig. 2 is a partial exploded view of the Fig. 1 shown. The one for Fig. The statements made in point 1 also apply to the Fig. 2. Additionally, it is pointed out that in the Fig. 2 the second stand 17.2 with the corresponding two foot wing screws 18.2 are easier to see.

[0044] Additionally, a heat shield 8 essential to the invention is shown. The heat shield 8 is arranged to rest on the fire grate 5 and extends towards the heat outlet 32. If an ash drawer or ash trap is present, the heat shield (8) is arranged opposite the ash drawer 4 or ash trap in its working position.

[0045] The heat shield 8 is reversible and interchangeable and can be arranged in the chimney 1.

[0046] The heat shield 8 consists of a base ring 27, the base ring 27 having a heat shield air inlet 9 around its circumference, wherein in the working position the heat shield 8 with the base ring 27 rests on the fire grate 5 and has a recess towards the fuel supply 2. The heat shield 8 has protective walls 28 towards the other walls of the chimney 1.

[0047] The heat shield 8 has a circumferential recess 11, which, in the area of ​​the protective walls 28 on the side facing away from the base ring 27, is projected in the working position towards the walls of the chimney 1. In the area of ​​the fuel inlet 10, the base ring 27 also forms the recess 11.

[0048] In the Fig. 2 can also be clearly seen that the chimney 1 has a fuel access 10, wherein the fuel access 10 in working position forms a hook-in cutout 19 on its edge pointing towards the heat outlet 32 ​​or the cooking area 3, wherein a hook-in rebate 20 of the fuel supply 2 can be hooked into this hook-in cutout 19 for pre-adjustment.

[0049] The pre-adjustment allows for a short holding of the fuel supply 2 until it can be connected to the chimney by means of the fuel supply wing screw 21.

[0050] Also, the Fig. 2 better to see that the carrying handle 16 is connected to the chimney 1 by means of two locking screws 23.

[0051] In this embodiment, the heat outlet 32 ​​has the cooking element 3. The cooking element 3 consists of two releasably interlocking struts which can be releasably inserted into insertion slots 30 of the chimney 1, the insertion slots 30 being recessed into the chimney 1 at the other end of the installation area 15.

[0052] In the Fig. 3 is a partially cutaway view of the Fig. 1 shown. The ones belonging to the Fig. 1 and Fig. The two statements made are also intended to Fig. 3 apply.

[0053] In the Fig. 4 is an enlarged partial view of the Fig. 3 shown from a different perspective. In particular, in the Fig. 4 to recognize how, through the heat protection 8 used and the surrounding protruding offset 11 and also the corresponding dimensioning of the heat protection 8, a draft gap 24 exists between the heat protection 8 and the chimney 1.

[0054] Between the heat protection air inlet 9 and the fire grate air inlet 6, there is a draft gap 24, whereby the heat protection air inlet 9, in its operating position, has a smaller distance from the fire grate 5 than the fire grate air inlet 6. In addition, the ventilation slots of the heat protection air inlet 9 have a larger air permeability than the ventilation slots of the fire grate air inlet 6 of the chimney 1.

[0055] The Fig. Figure 5 shows a rocket furnace R in transport position. Fig. Figure 6 additionally shows the rocket stove R located in a transport bag 25 from the Fig. 5.

[0056] To achieve the transport position, the feet 17.1, 17.2, the foot wing screws 18.1, 18.2, the disassembled cooking unit 3, and the fuel supply wing screw 21 are stored in the chimney 1. Additionally, the fuel supply 2, which, due to its larger size, can be pulled onto the chimney, is pulled onto the chimney at the other end of the installation area 15.

[0057] In the Fig. Figure 6 shows how the rocket stove R is placed in the transport bag 25. The carrying bag has a handle opening 31 and a carrying strap 26. Reference symbol list 1 fireplace 2 Fuel supply 3 cooking stations 4 ash drawers 5 Fire grate 6 Fire grate air intake 7 Fuel supply flap 8 Heat protection 9 Heat protection supply air 10 Fuel access 11 Clamping fold 12 sliders 13 ventilation controls 14 hinge 15 Installation area 16 Carrying handle 17 Stand 18 Foot wing screw 19 Hanging cutout 20 Hook fold 21 Fuel supply wing screw 22 Ash drawer air intake 23 Locking screw 24 Draft gap 25 Transport bag 26 Carrying strap 27 Base ring 28 protective walls 29 Heat protection cutout 30 insertion slots 31 Handle opening 32 Heat outlet R rocket stove QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] US D878,137

[0002] CN 110966622 A

[0003] CN 205316392 U

[0003] CN 210425110 U

[0004]

Claims

[1] Rocket furnace (R) with a chimney (1), wherein the chimney (1) has a heat outlet (32) at one end and a mounting area (15) at the other end, wherein a fuel supply (2) is provided and in the operating position the fuel supply (2) is arranged at an angle to the chimney (1), wherein a fire grate (5) is arranged in a chimney interior, wherein the fire grate (5) is arranged between the fuel supply (2) and the mounting area (15), characterized by , that a heat shield (8) is arranged resting on the fire grate (5) on the other side of the installation area (15). [2] Rocket furnace (R) according to claim 1, characterized by , that the heat shield (8) can be arranged reversibly and interchangeably in the chimney (1). [3] Rocket furnace (R) according to claim 2, characterized by, that the heat protection (8) consists of a base ring (27) wherein the base ring (27) has a heat protection air inlet (9) around its perimeter, wherein in the working position the heat protection (8) with the base ring (27) sits on the fire grate (5) and is open towards the fuel supply (2) with a heat protection recess (2) and has protective walls (28) towards the walls of the chimney (1). [4] Rocket furnace (R) according to any of the preceding claims, characterized by , that the heat protection (8) has a circumferential offset (11).. [5] Rocket furnace (R) according to any of the preceding claims, characterized by , that a fire grate air inlet (6) is provided between the fire grate (5) and the fuel supply (2). [6] Rocket furnace according to claims 3 and 5, characterized by, that a draft gap (24) exists between the heat protection air supply (9) and the fire grate air supply (6), wherein the heat protection air supply (9) in working position is less far from the fire grate (5) than the fire grate air supply (6). [7] Rocket furnace (R) according to any of the preceding claims, characterized by , that an ash drawer (4) is arranged between the fire grate (5) and the installation area (15), [8] Rocket furnace (R) according to any of the preceding claims, characterized by , that the chimney (1) has a fuel access (10), wherein the fuel access (10) forms a hook-in recess (19) on its edge pointing towards the heat outlet, wherein a hook-in recess (20) of the fuel supply (2) can be hooked into this hook-in recess (19) for pre-adjustment. [9] Rocket furnace (R) according to claim 8, characterized by, that the fuel supply (2) has on the one hand a fuel supply flap (7) and on the other hand an opening which in the working position leads into the fuel access (10). [10] Rocket furnace (R) according to claim 9, characterized by , that the fuel supply flap (7) has a sliding control (12) for adjusting a ventilation control (13) and is hinged to the fuel supply (2) by means of a hinge (14). [11] Rocket furnace (R) according to any of the preceding claims, characterized by that the fireplace (1) has a carrying handle (16). [12] Rocket furnace (R) according to any of the preceding claims, characterized by , that the fuel supply (2) is releasably connected to the chimney (1) by means of a fuel supply wing screw (21). [13] Rocket furnace (R) according to any of the preceding claims, characterized by, that the heat outlet (32) has a cooking area (3) consisting of two releasably interlocking struts which can be releasably inserted into insertion slots of the chimney (1), the insertion slots being recessed into the chimney (1) at the other end of the installation area (15). [14] Rocket furnace (R) according to any of the preceding claims, characterized by , that a stand (17.1, 17.2) is releasably connected to the chimney in the area of ​​the installation area (15) by means of a foot wing screw (18.1, 18.2). [15] Rocket furnace according to claim 14, characterized by , that in transport position the stand (17.1, 17.2), the foot wing screw (18.1, 18.2), the cooking area (3), fuel supply wing screw (21) are loosely stored in the chimney (1) and the fuel supply (2) is attached to the chimney (1) at the other end of the fire grate (5). [16] Rocket furnace (R) according to claim 15, characterized by, that a transport bag (25) with a carrying strap (26) holds the rocket stove (R) in transport position.

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