Liquid fuel combustion furnace with reflection spraying plate

Abstract

The invention provides a liquid fuel combustion furnace with a reflection spraying disc. Comprising fuel, a material box, a material pipe, a regulating valve, a heater, an atomizing nozzle, an igniter, a fire distributor, a furnace end throat part, a circular ring material collecting groove, a material returning hole and a throwing head, the throwing head is communicated with the material box through the material returning pipe, the reflection spraying disc is installed at the lower end of the heater, leaked materials are collected and flow back to a waste material box, flowing of preheated air is not affected, and the energy-saving effect is achieved. And leaked flame heat can be reflected back through the reflection spraying disc, and preheated air is preheated twice in sequence, so that energy loss is reduced, and the environment and safety are improved.

Description

Technical Field

[0001] This invention relates to the field of stoves, and particularly to liquid fuel combustion stoves. Background Technology

[0002] Liquid fuel combustion stoves refer to cooking stoves that use bottled liquid fuel as energy and directly heat it with fire. Liquid fuels have relatively high ignition points, requiring high temperatures to ignite, thus offering good safety. However, this also presents a challenge: ignition is more difficult. Therefore, preheating the liquid fuel is necessary to reach the required ignition temperature, ensuring easier and more complete combustion. This necessitates an electrical device for heating the fuel. However, for the safe operation of the electric heating element within the heater, a significant amount of liquid fuel is needed to cool it before heating; otherwise, the heating element will dry-burn and damage itself. During heating, the volume of the liquid fuel increases with rising temperature, but the corresponding container volume remains constant. Consequently, liquid fuel overflows from the atomizing nozzle and becomes scattered everywhere. Therefore, a drip tray with a concave surface is needed to collect this overflowing liquid fuel and allow it to flow back into the waste liquid fuel tank through a through-hole and return pipe. This achieves environmental beautification while reducing energy waste and ensuring safety. At the same time, since combustion requires sufficient oxygen, a ventilation duct is necessary. The flame's light will leak downwards through this ventilation duct, causing a loss of radiant heat. Therefore, a heat exchanger is needed to reflect this leaked light back and reheat the combustion air entering from the ventilation duct twice, thereby reducing energy consumption. Summary of the Invention

[0003] This invention proposes a reflective spray plate liquid fuel combustion furnace, which solves the energy-saving and environmental protection problems caused by material and light leakage due to the need for heating and ventilation during use. Therefore, reflective spray plate technology is needed to solve the above problems.

[0004] The technical solution of this invention is implemented as follows:

[0005] This invention proposes a reflective liquid fuel combustion furnace, comprising a feed pipe, a regulating valve, an electric heating rod, a heater, a liquid fuel atomizing nozzle, an electric pulse igniter, a flame distributor, a liquid fuel combustion furnace head, a furnace head throat, a reflective plate, a downwardly concave circular annular collecting groove on the surface of the reflective plate, an oil return hole in the downwardly concave collecting groove of the reflective plate, a central through-hole ejector with external threads, a return pipe, a liquid fuel tank, and a waste liquid fuel tank. The reflective plate is installed in the lower external threads of the heater, collecting as much waste liquid fuel as possible, which flows back to the waste liquid fuel tank through the central through-hole of the ejector and the return pipe, without affecting the normal flow of preheating air. It also reflects any missed flame rays back through the reflective plate, transforming them into upward-reflected flame heat, which preheats the air twice, thereby reducing energy loss and improving environmental and safety aspects.

[0006] Preferably, the preheating air is combustion air, which is essential for fuel combustion during flame combustion. It is produced by utilizing the high air velocity and lower pressure at the throat of the liquid fuel burner. Under this pressure difference, atmospheric air is squeezed in and participates in combustion. To ensure the required air volume for combustion, a certain horizontal flow area is necessary, hence the throat is a relatively large open space.

[0007] Preferably, when the combustion flame encounters the flame spreader (the flame spreader's function is to ensure that the flame's combustion speed equals the fuel's flow speed, thus solving the flameout problem and ensuring normal fuel combustion), some of the flame's light will, under the reaction force of the flame spreader, pass back through the throat's perforated area (light leakage), and preheat the compressed air. After releasing heat, the flame detaches from the combustion process; this is a form of heat energy loss in the form of thermal radiation.

[0008] Preferably, the light leakage radiation at the lower end of the heater is blocked by a reflective screen installed at the lower end of the heater, and is then reflected back into the combustion process by the reflective screen using optical principles, becoming upward reflection of flame heat, while simultaneously releasing heat to the air a second time. Therefore, the reflective screen significantly improves the thermal efficiency of the stove, reduces light and heat pollution around the stove, and optimizes the surrounding environment of the stove.

[0009] Preferably, because liquid fuels have a relatively high ignition temperature, they need to be heated to reach the ignition temperature in order to solve the problem of ignition difficulty.

[0010] Preferably, to ensure the heater does not dry-burn during operation, there must be sufficient liquid fuel around the electric heating rod for cooling. The regulating valve should be closed when sufficient liquid fuel is available. When the electric heating rod is turned on to heat the liquid fuel, the volume of the heated liquid fuel increases, while the regulating valve is closed (meaning the system volume remains constant). This results in liquid fuel constantly overflowing from the liquid fuel atomizing nozzle onto the floor, creating a very unsafe situation. The installation of a reflective cooling plate at this point allows for the collection of as much overflowing waste liquid fuel as possible, which is then returned to the waste liquid fuel tank through the central through-hole of the threaded head and the return pipe, achieving energy saving and environmental protection.

[0011] Preferably, the surface of the reflective screen is provided with a downwardly concave circular annular material collection groove, and both sides of the circular annular material groove are upturned to form a protective wall to prevent waste liquid fuel from overflowing.

[0012] Preferably, the surface of the reflective screen is provided with a downwardly concave circular annular material collection groove, so that the area around the center of the reflective screen naturally becomes a planar circular boss, and the outermost edge of the reflective screen naturally becomes an upwardly curved annular edge.

[0013] Preferably, there is a hole at the center of the aforementioned planar circular boss.

[0014] Preferably, the heater is cylindrical and has external threads at its lower end, and the diameter of the threads is smaller than the diameter of the aforementioned hole.

[0015] Preferably, the reflective screen is inserted into the external thread at the lower end of the heater. Before this, there is a pre-installed nut in the external thread. Then, another nut is used to fix and clamp the reflective screen into the external thread of the heater.

[0016] Preferably, the heater is fixed to the internal thread of the furnace frame using the external thread of the heater.

[0017] Preferably, the concave circular annular material collection groove of the reflective screen has a return hole.

[0018] Preferably, a screw head with external threads and a through hole in the center is installed on the oil return hole of the circular annular material collection trough. This screw head passes through the aforementioned material return hole and is fixedly clamped onto the oil return hole with two nuts, one in front and one behind.

[0019] Preferably, the externally threaded swivel head is then fitted with an internally threaded return pipe, and this return pipe is installed on and fixed to the swivel head.

[0020] Preferably, the return pipe is connected to the waste liquid fuel tank.

[0021] The beneficial effects of this invention are:

[0022] In summary, the reflective radiant liquid fuel combustion furnace of the present invention can preheat the combustion air through the reflective radiant plate, reduce light leakage loss, reduce the loss of radiant energy, reduce fuel overflow loss, protect the environment and working conditions, and improve the thermal efficiency of the furnace. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, and all of these are infringements of the present invention.

[0024] Figure 1 This is a schematic diagram of the structure of the reflective spray plate liquid fuel combustion furnace of the present invention:

[0025] In the diagram: 1. Feed pipe, 2. Regulating valve, 3. Electric heating rod, 4. Heater, 5. Electric pulse ignition needle, 6. Flame distributor, 7. Liquid fuel atomizing nozzle, 8. Throat of the liquid fuel combustion burner, 9. Heated preheated air, 10. Missed flame rays, 11. Flame rays reflected back by the reflector plate, 12. Reflector plate, 13. Circular annular material collection groove with a concave surface on the reflector plate, 14. Return hole of the reflector plate, 15. Fuel overflowing from the liquid fuel atomizing nozzle, 16. Liquid fuel combustion burner, 17. Return pipe, 18. Waste liquid fuel tank, 19. Liquid fuel tank, 20. Front and rear clamping nuts for fixing the reflector plate, 21. Center hole of the planar boss of the reflector plate, 22. External thread at the lower end of the heater, 22. Return head with a central through hole of external thread, 23. Upward-curving circular planar boss and annular edge, 20. Front and rear clamping nuts for fixing the return head. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] Example

[0028] Referring to the liquid fuel combustion furnace with a reflective screen, it includes: 1. Feed pipe; 2. Regulating valve; 3. Electric heating rod; 4. Heater; 5. Electric pulse ignition needle; 6. Flame distributor; 7. Liquid fuel atomizing nozzle; 8. Throat of the liquid fuel combustion furnace head; 9. Heated preheated air; 10. Missed flame rays; 11. Flame rays reflected back by the reflective screen; 12. Reflective screen; 13. Circular annular material collection groove with a concave surface on the reflective screen; 14. Return hole of the reflective screen; 15. Fuel overflowing from the liquid fuel atomizing nozzle; 16. Liquid fuel combustion furnace head; 17. Return pipe; 18. Waste liquid fuel tank; 19. Liquid fuel tank; 20. Front and rear clamping nuts for fixing the reflective screen; 21. Circular hole in the plane of the reflective screen boss; 22. External thread at the lower end of the heater; 22. Return head with external threaded center through hole; 23. Circular boss and annular edge with upward curve; 20. Front and rear clamping nuts for fixing the return head.

[0029] First, open the regulating valve to fill the entire heater with liquid fuel. When slits of liquid fuel overflow from the atomizing nozzle, close the regulating valve and start the electric heating rod to heat the liquid fuel. When the liquid fuel reaches its ignition temperature, press the electric pulse igniter to create a continuous electric spark. Then, open the regulating valve again, allowing the heated liquid fuel to be atomized through the atomizing nozzle and ignited by the continuous spark. During this process, some liquid fuel overflows from the atomizing nozzle and, under the influence of gravity, flows into the reflector plate installed at the lower end of the heater. It then flows back to the waste liquid fuel tank through the central through-hole of the return head and the return pipe, achieving energy saving and environmental protection. Because of the flame distributor, the flame velocity equals the fuel velocity. At this time, some flame rays radiate in the opposite direction under the action of the flame distributor. Since the throat of the burner is open, these flame rays will leak through this throat and radiate into the reflector plate, but then be reflected back. Because the airflow velocity is highest and the pressure is lowest at the burner throat (below atmospheric pressure), a large amount of air is forced in under atmospheric pressure. Utilizing convection heat release, the reverse flame light performs the first convective heat release on the forced-in air. The preheated air is then drawn into the flame by the flame's entrainment and participates in combustion. Simultaneously, the reflected flame light is reflected back by the reflector plate, further convecting and releasing heat on the forced-in air, thus improving the furnace's thermal efficiency and achieving energy conservation and environmental protection.

[0030] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

[0031] Option 2: Since the liquid fuel leakage only occurs during the initial ignition time and the amount leaked is limited, the return hole and the swivel head can be omitted in the reflective radiator. In this case, the leaked fuel can only be manually removed or allowed to dry naturally.

Claims

1. A reflective liquid fuel combustion furnace, characterized by: It includes a liquid fuel combustion burner head, heater, reflector plate, collection trough, return hole, sling with external thread and central through hole, liquid fuel tank, waste liquid fuel tank, feed pipe, return pipe, and the reflector plate is used to collect waste liquid fuel flowing down from the liquid combustion burner head and reflect the heat of the flame upward.

2. The reflective liquid combustion furnace according to claim 1, characterized in that: The surface of the reflective screen is provided with a downward-concave circular annular material collection groove, so that the area around the center of the reflective screen naturally becomes a planar protrusion, and the outermost edge of the reflective screen naturally becomes an upward-curving outer edge.

3. The reflective liquid fuel combustion furnace according to claim 1, characterized in that: There is a hole at the center of the planar boss of the reflective shower plate.

4. The reflective liquid fuel combustion furnace according to claim 1, characterized in that: The heater is cylindrical and has external threads at its lower end. Furthermore, the diameter of the threads is smaller than the diameter of the aforementioned hole.

5. The inverted liquid combustion furnace according to claim 1, characterized in that: Insert the reflective screen into the external thread at the lower end of the heater. There is already a nut installed in the external thread. Use another nut to fix and clamp the reflective screen into the external thread at the lower end of the heater.

6. The reflective liquid combustion furnace according to claim 1, characterized in that: The concave circular annular material collection trough of the reflective screen has a return hole.

7. The reflective liquid combustion furnace according to claim 6, characterized in that: On the return hole of the circular annular material collection trough, a sling head with external threads and a through hole in the center is installed. This sling head passes through the return hole and is fixed and clamped to the oil return hole with two nuts, one in front and one behind.

8. The reflective liquid combustion furnace according to claim 7, characterized in that: The aforementioned externally threaded sling head is then fitted with an internally threaded return pipe, which is then installed on and secured to the sling head.

9. The reflective liquid combustion furnace according to claim 8, characterized in that: The return pipe is connected to the waste liquid fuel tank.

10. The reflective liquid combustion furnace according to claim 1, characterized in that: The circular annular collection trough with the reflective screen plate recessed downwards contains no other facilities, only the trough itself.

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