Combustion furnace for outdoor fuel stove

Abstract

The utility model provides a combustion furnace for an outdoor fuel stove, which is characterized in that an inner shell (2) is sleeved in an outer shell (1), a hollow cavity (3) is formed between the outer shell (1) and the inner shell (2), and a shield (4) is sleeved and fixed in the hollow cavity (3); the main support (10) is arranged in the inner shell (2) in a sleeved mode, the main support (10) is composed of an upper metal ring (101), a lower metal ring (102) and a plurality of metal rods (103), the radius of the upper metal ring (101) located on the upper portion is smaller than that of the lower metal ring (102) located on the lower portion, and the metal rods (103) are arranged between the upper metal ring (101) and the lower metal ring (102). According to the combustion furnace provided by the utility model, the problem that liquid fuel oil in an outdoor combustion stove cannot be completely atomized after being heated can be effectively solved, and the problems of potential safety hazards, continuous combustion and the like in the combustion process can be solved.

Description

Technical Field

[0001] This utility model relates to a combustion furnace for outdoor fuel stoves. Background Technology

[0002] With the significant improvement in people's living standards, the demand for cooking during outdoor camping has greatly increased, thus requiring a highly integrated combustion stove with a high heat conversion rate. As the primary cooking equipment during outdoor travel, the combustion quality and safety of the stove are extremely important. To reduce the overall size of the stove, oil-fired stoves often employ an evaporative fuel atomization method. Evaporative atomization requires preheating the fuel evaporator cap to a certain temperature before fuel is supplied, allowing the liquid fuel to transform into an atomized state upon heating. The atomized fuel then burns continuously under the action of a glow plug. However, current preheating standards for oil-fired stoves rely on time-based timing. This method is susceptible to variations in ambient temperature and other factors, causing the fuel evaporator cap to fail to reach the expected temperature. When the timer expires, fuel is supplied to the stove, resulting in the liquid fuel failing to ignite properly, posing safety hazards and issues with stable and continuous combustion. Summary of the Invention

[0003] The purpose of this utility model is to provide an outdoor fuel stove combustion furnace that improves heat feedback, ensures calorific value efficiency, and provides safer and more stable combustion. The technical solution of this utility model is: an outdoor fuel stove combustion furnace, including: an outer shell (1), an inner shell (2), a main support (10), and multiple auxiliary supports (7); wherein the inner shell (2) is fitted inside the outer shell (1), and a hollow cavity (3) is formed between the outer shell (1) and the inner shell (2), and a protective cover (4) is fitted and fixed inside the hollow cavity (3); the main support (10) is fitted inside the inner shell (2), and the main support (10) is composed of an upper metal ring (101), a lower metal ring (102), and multiple metal rods (103), wherein the upper metal ring (101) located at the top has a smaller radius than the lower metal ring (102) located at the bottom, multiple metal rods (103) are arranged between the upper metal ring (101) and the lower metal ring (102), and multiple auxiliary supports (7) are fixed. On the inner wall of the inner shell (2), multiple auxiliary supports (7) are used to support the lower metal ring (102) located at the bottom. Multiple spring clips (8) are provided on the upper part of the auxiliary supports (7). The multiple spring clips (8) and the multiple auxiliary supports (7) are respectively fixed on the lower metal ring (102). Multiple evacuation holes (6) are provided on the inner wall of the inner shell (2). A fuel evaporation cap (11) is provided at the bottom of the inner shell (2). A heat-insulating cap (5) is provided on the upper part of the protective cover (4). An outer shell cap (13) is provided at the bottom of the protective cover (4). A heat insulation pad (12) is provided between the bottom of the fuel evaporation cap (11) and the outer shell cap (13). An external temperature sensor (14) passes through the heat insulation pad (12) and the outer shell cap (13) and is provided at the bottom of the fuel evaporation cap (11). A combustion air duct (18) is provided on the side wall of the outer shell (1).

[0004] The bottom of the protective cover (4) is provided with an outer shell cover (13), and there is an opening with a distance of H between the protective cover (4) and the outer shell cover (13).

[0005] The fuel delivery pipe (15) outlet end (151) is located at the lower part of the lower metal ring (102); the igniter (16) passes through the outer shell (1) and the inner shell (2) and is located between the lower metal ring (102) and the fuel evaporation cap (11).

[0006] A steel wire support (9) is located at the lower part of the sub-support (7). Multiple sub-supports (7) are used to support the steel wire support (9). Fireproof fiber cloth (17) is located between the steel wire support (9) and the fuel vapor cover (11).

[0007] The working principle of this utility model:

[0008] This invention utilizes a hollow cavity (3) formed between the outer shell (1) and the inner shell (2). The required combustion air is blown into the hollow cavity (3) through the combustion air duct (18) by a fan. The combustion airflow enters the combustion furnace through the inner shell hole under the action of air pressure. Multiple spring clips (8) and multiple auxiliary supports (7) are respectively fixed on the lower metal ring (102) at the lower part of the main support (10), so that the main support (10) is completely fixed in the combustion furnace. The external temperature sensor (14) can monitor the surface temperature of the fuel evaporation cap (11). By using the igniter (16) set between the lower metal ring (102) and the fuel evaporation cap (11) to bake, when the surface of the fuel evaporation cap (11) is baked to a temperature suitable for fuel atomization, the fuel can be transported into the combustion furnace from the fuel delivery pipe (15). Initially, the oil vapor ignition is mainly concentrated in the space formed by the fuel vapor evaporation cap (11) and the upper metal ring (101). After a certain period of combustion, the flame gradually passes through the main support (10). The vigorous flame will concentrate in the space formed by the relatively dense venting holes (6) on the inner shell (2). The heat generated by the combustion will flow to the outer surface of the heating carrier.

[0009] Technical effects of this utility model:

[0010] This utility model has the following beneficial effects:

[0011] 1. By utilizing the hollow cavity (3) formed between the outer shell (1) and the inner shell (2), the combustion airflow is blown into the hollow cavity (3) from the combustion air duct (18) and then enters the combustion furnace through the inner shell hole. The airflow is more uniform and effective, and the combustion effect is better. The heat-insulating cover (3) set on the top of the cover (4) can prevent the heat in the inner shell (2) from being lost too quickly, improve heat feedback, and ensure calorific value efficiency. The external temperature sensor (14) set at the bottom of the fuel evaporation cover (11) can monitor the temperature suitable for fuel atomization, and can complete ignition efficiently and safely. When it is found that it is not ignited or the combustion is incomplete, the fuel pump can be actively shut off to prevent fuel waste and excessive carbon deposits.

[0012] 2. By utilizing the opening with a distance H between the protective cover (4) and the outer cover (13), the purpose is to ensure that the air entering the hollow cavity (3) can effectively enter the inner shell (2), and the protective cover (4) can prevent the combustion airflow from blowing directly into the inner shell (2), so that the combustion airflow flows stably and evenly to the inner shell hole through the opening.

[0013] 3. By using multiple spring clips (8) and multiple auxiliary supports (7) to fix the main support (10) to the lower metal ring (102) located at the bottom of the main support (10), the main support is completely fixed in the combustion furnace, so that the flame is not easy to leap out during ignition and combustion, and the combustion is safer and more stable.

[0014] 4. Fireproof fiber cloth (17) is fixed by using steel wire bracket (9) and fuel evaporation cover (11). The fireproof fiber cloth serves as a carrier for fuel oil, which can store and supply fuel for combustion in the combustion furnace in real time. The fuel evaporation cover (11) can be easily disassembled when needed to clean carbon deposits.

[0015] 5. The heat insulation pad (12) is placed between the bottom of the fuel evaporation cap (11) and the outer shell cap (13), and the external temperature sensor (14) is inserted inside the heat insulation pad (12). The purpose of the heat insulation pad is to reduce the temperature inside the combustion furnace from being conducted outward and to reduce the interference of the environment on the external temperature sensor (14). Attached Figure Description

[0016] Figure 1 This is a cross-sectional view of the overall structure of the outdoor fuel-fired stove combustion furnace in an embodiment of this utility model;

[0017] Figure 2 This is a cross-sectional view of the internal structure of the inner shell 2 in an embodiment of the present invention;

[0018] Figure 3 This is a schematic diagram of the inverted spring clip 8 in an embodiment of this utility model. Detailed Implementation

[0019] See Figure 1This utility model provides an outdoor fuel-fired stove combustion furnace, including: an outer shell 1, an inner shell 2, a main support 10, and multiple auxiliary supports 7; wherein the inner shell 2 is fitted inside the outer shell 1, and a hollow cavity 3 is formed between the outer shell 1 and the inner shell 2, and a protective cover 4 is fitted and fixed inside the hollow cavity 3; multiple evacuation holes 6 are provided on the wall of the inner shell 2, and a fuel evaporation cover 11 is provided at the bottom of the inner shell 2; a heat-insulating cover 5 is provided on the upper part of the protective cover 4, and an outer shell cover 13 is provided at the bottom of the protective cover 4; a heat insulation pad 12 is provided between the bottom of the fuel evaporation cover 11 and the outer shell cover 13; an external temperature sensor 14 passes through the heat insulation pad 12 and the outer shell cover 13 and is provided at the bottom of the fuel evaporation cover 11; the oil outlet end 151 of the fuel delivery pipe 15 is provided at the lower part of the lower metal ring 102; an igniter 16 passes through the outer shell 1 and the inner shell 2 and is provided between the lower metal ring 102 and the fuel evaporation cover 11; a combustion-supporting air duct 18 is provided on the side wall of the outer shell 1.

[0020] Example 1: The external temperature sensor 14 can monitor the surface temperature of the fuel evaporation cap 11. By using the igniter 16 set between the lower metal ring 102 and the fuel evaporation cap 11 to bake the surface of the fuel evaporation cap 11 to a temperature suitable for fuel atomization, the fuel can be transported from the fuel delivery pipe 15 into the combustion furnace, and ignition can be completed efficiently and safely.

[0021] To further explain, when the surface temperature of the fuel evaporation cap 11 reaches the fuel atomization temperature, ignition can be completed by directly supplying fuel into the combustion furnace without starting the igniter.

[0022] like Figure 1 The bottom of the protective cover 4 is provided with an outer shell cover 13, and there is an opening with a distance H between the protective cover 4 and the outer shell cover 13. The protective cover 4 can prevent the combustion airflow from blowing directly into the inner shell 2, so that the combustion airflow flows stably and evenly into the inner shell hole through the opening with a distance H.

[0023] A steel wire support 9 is located below the secondary support 7. Multiple secondary supports 7 are used to support the steel wire support 9. Fireproof fiber cloth 17 is placed between the steel wire support 9 and the fuel evaporation cover 11. The fireproof fiber cloth is the carrier for carrying fuel oil, providing fuel for the combustion furnace in real time. The fuel evaporation cover 11 can be easily disassembled when needed to clean carbon deposits.

[0024] See Figure 2The main support 10 is fitted inside the inner shell 2. The main support 10 consists of an upper metal ring 101, a lower metal ring 102, and multiple metal rods 103. The upper metal ring 101 has a smaller radius than the lower metal ring 102. The multiple metal rods 103 are disposed between the upper metal ring 101 and the lower metal ring 102. Multiple auxiliary supports 7 are fixed to the inner wall of the inner shell 2. The multiple auxiliary supports 7 are used to support the lower metal ring 102. Multiple spring clips 8 are provided on the upper part of the auxiliary supports 7. The multiple spring clips 8 and the multiple auxiliary supports 7 are respectively fixed to the lower metal ring 102.

[0025] Example 2: The metal rod 103 can be welded between the upper metal ring and the lower metal ring by welding; the auxiliary support 7 can be welded to the inner wall of the inner shell 2, or fixed to the inner wall of the inner shell 2 by rivets.

[0026] In this embodiment, the structure can only prevent it from falling downwards, but cannot prevent it from moving upwards. As an outdoor tool, the main support 10 may move upwards due to the bumps during transportation and unloading, which may cause misalignment and danger. In order to further fix the main support 10, multiple spring clips 8 are provided on the upper part of multiple auxiliary supports 7. The multiple spring clips 8 and multiple auxiliary supports 7 are respectively fixed on the lower metal ring 102 at the lower part of the main support 10.

[0027] See Figure 3 The one-way rotating edge AB of the spring clip 8 can rotate around point A along the dotted arrow, thereby allowing the main support 10 to enter the inner shell 2. Since the spring clip is set inside, when the AB edge is reset, the lower metal ring is blocked by the spring clip 8, thus playing a fixing role.

[0028] It is understandable that when installing the main bracket 10, it is necessary to enter from the upper part of the inner shell 2. When the lower metal ring 102 passes through the spring clip 8, the main bracket 10 can only continue to move downward and cannot be pulled out. There are also multiple auxiliary brackets 7 below that form a shield, so the lower metal ring can be firmly fixed in the inner shell 2, thereby achieving the purpose of fixing the main bracket 10.

Claims

1. An outdoor oil-fired stove, characterized in that: include: The enclosure consists of an outer shell (1), an inner shell (2), a main support (10), and multiple auxiliary supports (7). The inner shell (2) is fitted inside the outer shell (1), and a hollow cavity (3) is formed between the outer shell (1) and the inner shell (2). A protective cover (4) is fitted and fixed inside the hollow cavity (3). The main support (10) is fitted inside the inner shell (2). The main support (10) is composed of an upper metal ring (101), a lower metal ring (102), and multiple metal rods (103). The upper metal ring (101) has a smaller radius than the lower metal ring (102). Multiple metal rods (103) are arranged between the upper metal ring (101) and the lower metal ring (102). Multiple auxiliary supports (7) are fixed to the inner wall of the inner shell (2). The sub-support (7) is used to support the lower metal ring (102) located at the bottom. The upper part of the sub-support (7) is provided with multiple spring clips (8), and the multiple spring clips (8) and the multiple sub-supports (7) are respectively fixed on the lower metal ring (102). The inner shell (2) is provided with multiple evacuation holes (6) on the wall. The bottom of the inner shell (2) is provided with a fuel evaporation cap (11). The upper part of the protective cover (4) is provided with a heat-insulating cap (5), and the bottom of the protective cover (4) is provided with an outer shell cap (13). The heat insulation pad (12) is located between the bottom of the fuel evaporation cap (11) and the outer shell cap (13). The external temperature sensor (14) passes through the heat insulation pad (12) and the outer shell cap (13) and is located at the bottom of the fuel evaporation cap (11). The side wall of the outer shell (1) is provided with a combustion air duct (18).

2. The outdoor fuel-fired stove according to claim 1, characterized in that: The bottom of the protective cover (4) is provided with an outer shell cover (13), and there is an opening with a distance of H between the protective cover (4) and the outer shell cover (13).

3. The outdoor fuel-fired stove according to claim 1, characterized in that: The fuel delivery pipe (15) outlet end (151) is located at the lower part of the lower metal ring (102); the igniter (16) passes through the outer shell (1) and the inner shell (2) and is located between the lower metal ring (102) and the fuel evaporation cap (11).

4. The outdoor fuel-fired stove combustion chamber according to claim 1, characterized in that: steel wire The bracket (9) is located at the lower part of the sub-bracket (7). Multiple sub-brackets (7) are used to support the wire bracket (9). Fireproof fiber cloth (17) is located between the wire bracket (9) and the fuel vapor cover (11).

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