Cyclone mixing type combustion chamber and fuel oil stove using same

Abstract

A cavity is formed between a base cylinder and an upper cylinder, and the top of the upper cylinder is opened to form a combustion chamber; the oil spraying device is installed in the center of the bottom of the base barrel, a channel hole is formed in the center of the bottom of the upper barrel, a top oil spraying nozzle of the oil spraying device penetrates into the channel hole, a cover barrel is arranged between the channel hole and the oil spraying device, a gap is reserved between the cover barrel and the oil spraying device, and ventilation holes are formed in the cover barrel in the circumferential direction of the cover barrel. And communication between the cavity and the gap is realized. Through the arrangement of the cover cylinder and the ventilation holes, the whole stove can be smoothly ignited and combusted under the condition of a small amount of fuel oil mist, adhesion among fuel oil mist particles is effectively prevented, the combustion effect of fuel oil is improved, and flame adjustment can be achieved through air inlet adjustment of the fan.

Description

Technical Field

[0001] The utility model belongs to the field of stoves, and more specifically, relates to fuel stoves and cookers. Background Art

[0002] In the field of gas stoves applicable to restaurants and hotels, generally according to the mixing order of gas and air, there are pre-mixed stoves and direct-mixed stoves (or post-mixed stoves). For pre-mixing, before the ignition needle ignites, in order to achieve full combustion, gas and air are pre-mixed in advance; for direct mixing, gas and air are introduced into the combustion chamber together, and then quickly ignited, mixing and burning simultaneously. After research and development by the applicant and the inventor, an improved solution was proposed for pre-mixed stoves, and the invention patent "Multi-purpose Commercial Gas Energy-saving Stove with a Constant Pressure Rotator" with the application number 2017103525058 was applied for and authorized; for post-mixed stoves, two patent applications were filed, namely "Cyclone Mixing Combustion Chamber and Cooker" (application number 2019206192198), and "Fire Suppression Cap, Cyclone Mixing Combustion Chamber and Cooker" (application number 2019206192319). It should be noted that the above improved stoves all retain the upper part of the stove technology composed of a fire control ring, a heat preservation plate and a furnace chamber, and divide the lower part of the stove technology into pre-mixed structure and post-mixed structure, which are installed and used according to the actual needs of customers. However, in practice, there are not only gas cookers, but also cookers using fuel oil. Since fuel oil is generally in a liquid state and cannot be fully mixed with air, not only the actual combustion effect is poor, but also there is a lack of corresponding effective cookers. Summary of the Utility Model

[0003] The purpose of the utility model is to overcome the deficiencies of the prior art, and provides a cyclone mixing combustion chamber and a fuel cooker using this structure.

[0004] The technical purpose of the utility model is realized through the following technical solutions:

[0005] The cyclone mixing combustion chamber includes a base cylinder, an upper cylinder and an oil injection device.

[0006] The upper cylinder is installed on the base cylinder, and a cavity is formed between them. The top of the upper cylinder is open, and a combustion chamber is formed inside it;

[0007] The oil injection device is installed at the central position of the bottom of the base cylinder. A channel hole is provided at the central position of the bottom of the upper cylinder. The top oil nozzle of the oil injection device penetrates into the channel hole, so that the fuel oil mist sprayed from the top oil nozzle of the oil injection device can be sprayed upward through the channel hole into the combustion chamber for combustion.

[0008] A cover cylinder is provided between the channel hole at the bottom of the upper cylinder body and the fuel injection device. The top fuel injection nozzle of the fuel injection device is located inside the cover cylinder, and a gap is left between the cover cylinder and the top fuel injection nozzle of the fuel injection device. Ventilation holes are provided on the cover cylinder along its circumferential direction to achieve the communication between the cavity and the gap.

[0009] In the above technical solution, an air inlet is provided at the bottom of the base cylinder body around the fuel injection device. Air enters the cavity through the air inlet. An air outlet hole is provided on the cylinder wall of the upper cylinder body. Along the height direction of the cylinder wall of the upper cylinder body, upper inclined air outlet holes and bottom inclined air outlet holes are arranged from top to bottom. Each circle of air outlet holes is evenly distributed on the circumferential of the cylinder wall at their respective heights. The upper inclined air outlet holes and the bottom inclined air outlet holes blow air in the cross-section of the combustion chamber at their respective set heights, and the air outlet directions of the two are opposite. If the air outlet direction of the upper inclined air outlet holes is counterclockwise, the air outlet direction of the bottom inclined air outlet holes is clockwise, and vice versa; from the perspective of the cross-section of the combustion chamber, for each upper inclined air outlet hole, the air outlet direction has a first inclination angle with the radius of the combustion chamber, and the radius of the combustion chamber is perpendicular to the tangent direction of the combustion chamber at the position where the upper inclined air outlet hole is located; for each bottom inclined air outlet hole, the air outlet direction has a second inclination angle with the radius of the combustion chamber, and the radius of the combustion chamber is perpendicular to the tangent direction of the combustion chamber at the position where the bottom inclined air outlet hole is located; the inclination directions of the first inclination angle and the second inclination angle are opposite, one is inclined from the radius from the center of the combustion chamber (i.e., the center of the combustion chamber) to the right, and the other is inclined from the radius from the center of the combustion chamber (i.e., the center of the combustion chamber) to the left, and they may be the same or different in size.

[0010] In the above technical solution, a top air outlet hole communicating with the cavity is provided on the top wall of the upper cylinder body, and its air outlet direction points to the axis of the combustion chamber, that is, the air outlet direction is the direction pointing to the central axis of the combustion chamber.

[0011] In the above technical solution, by setting the number and aperture of the ventilation holes, a proper small amount of air coming from the air inlet through the cavity is controlled to pass through the ventilation holes and enter the gap between the cover cylinder and the fuel injection device and flow upward.

[0012] In the above technical solution, an ignition needle is provided. The ignition needle is vertically installed through the base cylinder body and the upper cylinder body. That is, a corresponding first installation hole for the ignition needle is provided on the bottom surface of the base cylinder body, and a second installation hole for the ignition needle corresponding to the first installation hole for the ignition needle is provided on the bottom surface of the upper cylinder body.

[0013] In the above technical solution, a top cap is detachably provided at the top of the ignition needle to prevent it from being contaminated.

[0014] In the above technical solution, a metal jacket is coaxially arranged outside the ignition needle, and the metal jacket is vertically installed through the base cylinder body and the upper cylinder body.

[0015] In the above technical solution, a circular groove and an ignition needle mounting table are further provided on the bottom surface of the upper cylinder body. The ignition needle is mounted on the ignition probe mounting table, and the height of the ignition needle mounting table is higher than that of the groove.

[0016] In the above technical solution, an installation part for installing the fuel injection device is provided at the central position of the bottom of the base cylinder body. The installation part is a circular ring sheet body, and the outer periphery of the circular ring sheet body is connected to the bottom of the base cylinder body through connecting claws. 3-6 connecting claws are selected and evenly distributed in a circumferential manner on the outer periphery of the circular ring sheet body, and an air inlet is formed between two adjacent connecting claws.

[0017] In the above technical solution, the fuel injection device includes a base, a fuel injection nozzle and a mounting nut. An oil inlet pipe is provided on the side of the base; the mounting nut and the base are clamped and fixed on the installation part of the base cylinder body, and the fuel injection nozzle is provided on the base.

[0018] The fuel stove using the above cyclone mixing combustion chamber includes a furnace chamber and a heat preservation plate arranged in the furnace chamber. The furnace chamber is connected to the cyclone mixing combustion chamber. A fire control ring is arranged above the combustion chamber, and a top air outlet hole is located in the fire control ring. The fire control ring is located at the central position of the furnace chamber and the heat preservation plate.

[0019] The advantages and beneficial effects of the present utility model are as follows: Through the setting of the cover cylinder and the ventilation holes, the whole stove can be smoothly ignited and burned under the condition of a small amount of fuel oil mist, effectively preventing the adhesion between fuel oil mist particles, improving the combustion effect of the fuel, and realizing the adjustment of the flame through the air inlet adjustment of the fan. Description of the Drawings

[0020] Figure 1 It is a schematic structural diagram of the cyclone mixing combustion chamber of the present utility model.

[0021] Figure 2 It is a schematic top view structure diagram of the base cylinder body in the present utility model.

[0022] Figure 3 It is a schematic top view structure diagram of the upper cylinder body in the present utility model.

[0023] Figure 4 It is a schematic structural diagram of the fuel injection device in the present utility model.

[0024] Figure 5 It is a schematic structural diagram of the cover cylinder in the present utility model.

[0025] Figure 6 It is a schematic diagram of the air flow path of the fuel stove in the working state of the present utility model.

[0026] Figure 7 It is a schematic structural diagram of the fuel stove of the present utility model.

[0027] Among them, 1 is the base cylinder, 1-1 is the air inlet pipe, 1-2 is the first installation hole for the ignition needle, 2 is the upper cylinder, 2-1 is the air outlet hole, 2-2 is the top air outlet hole, 2-3 is the groove, 2-4 is the second installation hole for the ignition needle, 3 is the fuel injection device, 3-1 is the base, 3-2 is the fuel injector, 3-3 is the mounting nut, 3-4 is the fuel inlet pipe, 4 is the cavity, 5 is the air inlet, 6 is the passage hole, 7 is the cover cylinder, 7-1 is the ventilation hole, 8 is the ignition needle, 9 is the circular sheet body, 9-1 is the connecting claw, 10 is the combustion chamber, 11 is the fire control ring, 12 is the heat preservation plate, and 13 is the furnace chamber.

[0028] Figure 8 It is a schematic structural diagram of the top cap and the metal outer sleeve of the ignition needle in the present utility model, where 8-1 is the top cap and 8-2 is the metal outer sleeve.

[0029] Figure 9 It is a schematic diagram of the air outlet direction of the middle air outlet hole of the upper cylinder in the present utility model, where 2-5 is the cylinder wall of the upper cylinder, 14 is the center of the combustion chamber, 15 is the radius of the combustion chamber, 16 is the tangent of the combustion chamber, and 17 is the designed position of the middle air outlet hole.

[0030] Figure 10 It is a schematic diagram of the air outlet directions of the upper inclined air outlet hole and the bottom inclined air outlet hole of the upper cylinder in the present utility model, where 2-5 is the cylinder wall of the upper cylinder, 14 is the center of the combustion chamber, 15 is the radius of the combustion chamber, 16 is the tangent of the combustion chamber, 18-1 is the air outlet direction of the upper inclined air outlet hole, 18-2 is the air outlet direction of the bottom inclined air outlet hole, 19 is the position of the upper inclined air outlet hole, 20 is the position of the bottom inclined air outlet hole, α is the inclination angle of the upper inclined air outlet hole, and β is the inclination angle of the bottom inclined air outlet hole.

[0031] For those of ordinary skill in the art, without creative efforts, other related drawings can be obtained based on the above drawings. Specific Embodiments

[0032] In order to enable those in the technical field to better understand the solution of the present utility model, the technical solution of the present utility model will be further described below in conjunction with specific embodiments.

[0033] Based on the gas cookers developed by the previous applicant and inventor, the development of fuel cookers is carried out. The upper part of the improved stove retains the stove technology composed of a fire control ring, a heat preservation plate, and a furnace chamber, and the technical solution applicable to gas in the lower part is adjusted to a technical solution applicable to fuel.

[0034] For the technical solutions applicable to gas, please refer to the two patent applications "Cyclone Mixing Combustion Chamber and Cooker" (Application No. 2019206192198) and "Flame Suppression Cap, Cyclone Mixing Combustion Chamber and Cooker" (Application No. 2019206192319) proposed for post-mixing in the prior art. Considering the characteristic that liquid fuel is not easy to mix with air, the "Cyclone Mixing Combustion Chamber" is improved, as detailed in the following embodiments.

[0035] A fuel cooker, namely the "Cyclone Mixing Combustion Chamber" applicable to fuel, see Figure 1 -3, including a base cylinder, an upper cylinder and an oil injection device.

[0036] The upper cylinder is installed on the base cylinder, and a cavity is formed between them. The top of the upper cylinder is open, and a combustion chamber is formed inside it;

[0037] The oil injection device is installed at the central position of the bottom of the base cylinder. A channel hole 6 is provided at the central position of the bottom of the upper cylinder 2. The top oil nozzle of the oil injection device 3 penetrates into the channel hole 6 so that the fuel oil mist ejected from the top oil nozzle of the oil injection device 3 can be sprayed upward through the channel hole 6 into the combustion chamber for combustion.

[0038] An air inlet 5 is provided around the oil injection device 3 at the bottom of the base cylinder 1. Air enters the cavity 4 through the air inlet. A plurality of air outlet holes 2-1 are provided on the cylinder wall of the upper cylinder 2. In this way, both the air inlet 5 and the air outlet 2-1 are communicated with the cavity 4. During operation, the air blown in by the intake pipe 1-1 enters the cavity 4 through the air inlet 5, and then enters the combustion chamber from the air outlet 2-1. In the combustion chamber, the air is mixed with the fuel oil mist ejected from the oil injection device 3 for full combustion.

[0039] A cover cylinder 7 is provided between the channel hole 6 at the bottom of the upper cylinder 2 and the oil injection device 3. The top oil nozzle of the oil injection device 3 is located inside the cover cylinder 7, and a gap is left between the cover cylinder 7 and the top oil nozzle of the oil injection device 3. The cover cylinder 7 is selected to be provided on the inner wall of the channel hole 6 to construct an isolation between the channel hole 6 and the air inlet 5. Ventilation holes 7-1 are provided on the cover cylinder 7 along its circumferential direction (see attached Figure 5 ) to realize the communication between the cavity 4 and the gap (located between the cover cylinder 7 and the top oil nozzle of the oil injection device 3). By setting the number and aperture of the ventilation holes 7-1, a suitable small amount of air required from the air inlet 5 through the cavity 4 is controlled to enter the gap between the cover cylinder 7 and the oil injection device 3 through the ventilation holes 7-1 and flow upward.

[0040] On the top wall of the upper cylinder body 2, there are top air outlet holes 2-2 communicating with the cavity 4, and the air outlet direction points to the direction of the central axis of the combustion chamber and forms an angle with the central axis to further enhance the combustion effect. After the air outlet inside the combustion chamber is mixed with the oil mist, it is ignited by ignition, and the fuel burns in the combustion chamber. At the outlet of the combustion chamber, air is supplemented by the top inclined air outlet holes (group) and the flame is shaped. For example, the straight flame spraying the bottom of the pot is the main one, and the rotating flame supplementing the heat around the bottom of the pot is the auxiliary one, which improves the applicability while enhancing the combustion effect.

[0041] In the "cyclone mixing combustion chamber", air outlet holes 2-1 are opened on the cylinder wall of the upper cylinder body 2. Along the height direction of the cylinder wall of the upper cylinder body, three groups of air outlet holes are arranged. Each group of air outlet holes is evenly distributed on the circumferential of the cylinder wall at its respective height. From top to bottom, they are the upper inclined air outlet holes (group), the middle air outlet holes (group) and the bottom inclined air outlet holes (group). Among them: in the three groups of air outlet holes, the air outlet direction of each middle air outlet hole in the middle air outlet hole group located in the middle position points to the center of the cross-section of the combustion chamber at this height (that is, the height where the middle air outlet hole group is located). Taking a certain height of a combustion chamber with one circle of middle air outlet holes as an example, at this height, the upper cylinder body (equivalent to the combustion chamber) is transversely cut, and the cross-section from top to bottom is as follows Figure 9 shown in the top view schematic diagram of the combustion chamber. The middle air outlet holes are evenly distributed on the cylinder wall 2-5 of this circle of upper cylinder body. The whole cylinder wall forms a circle, and its center is the combustion chamber center 14. At a certain position 17 where the middle air outlet holes need to be set according to the design, the combustion chamber tangent 16 is perpendicular to the combustion chamber radius 15. At this position, the drilling equipment drills holes along the direction of the combustion chamber radius 15 on the cylinder wall 2-5 of the upper cylinder body to form the middle air outlet holes, and the air outlet direction of this middle air outlet hole points to the combustion chamber center 14, that is, the air outlet direction is the vertical direction. Considering the machining accuracy, one circle of middle air outlet holes is basically at the same height, and the air outlet direction of each middle air outlet hole is basically the vertical direction.

[0042] The upper inclined air outlet holes and the bottom inclined air outlet holes discharge air in the cross-section of the combustion chamber at their respective set heights, and their air outlet directions are opposite. As shown in Figure 10 shown, 2-5 is the cylinder body of the upper cylinder body, and its inside is the combustion chamber. Figure 10It is a top view schematic diagram of the combustion chamber. Taking a certain height of the combustion chamber with a circle of upper inclined air outlet holes as an example, at this height, the upper cylinder (equivalent to the combustion chamber) is transversely cut, and the cross-section is from top to bottom. The upper inclined air outlet holes are evenly distributed on the cylinder wall 2-5 of the upper cylinder of this circle. At a position 19 where the upper inclined air outlet holes need to be set according to a certain design, the combustion chamber tangent 16 is perpendicular to the combustion chamber radius 15. At this position, the drilling equipment drills holes on the cylinder wall 2-5 of the upper cylinder along the air outlet direction 18-1 of the upper inclined air outlet hole, forming the upper inclined air outlet hole. There is an inclination angle α (i.e., the first inclination angle) between the air outlet direction of the upper inclined air outlet hole and the combustion chamber radius 15. After the processing and setting of the circle of upper inclined air outlet holes, considering the machining accuracy, the air outlet direction of each upper inclined air outlet hole is basically maintained within the cross-section of the combustion chamber at this design height, and the air outlet is within this cross-section. The inclination angle directions of each upper inclined air outlet hole are the same, that is, they all incline from the combustion chamber radius 15 perpendicular to the combustion chamber tangent 16 passing through the upper inclined air outlet hole to the air outlet direction 18-1 of the upper inclined air outlet hole, thereby generating an inclination angle. Figure 10 The air outlet direction 18-1 in Figure 10 is called "counterclockwise air outlet". Since the air outlet direction of each upper inclined air outlet hole is counterclockwise, the air outlet directions of a circle of upper inclined air outlet holes (group) form a counterclockwise air outlet as a whole, forming a counterclockwise cyclone at the top of the combustion chamber. The inclination angle sizes of all upper inclined air outlet holes are the same to keep the air outlet directions of the entire upper inclined air outlet holes consistent; considering the machining accuracy, there are errors in the inclination angle sizes of each upper inclined air outlet hole, that is, the air outlet direction of each upper inclined air outlet hole maintains "counterclockwise air outlet" and is basically maintained within the cross-section of the combustion chamber at the design height, but there are size differences in the inclination angle α of each upper inclined air outlet hole.

[0043] Utilize Figure 10Next, look at the design of the bottom inclined air outlet holes. Taking a certain height of the combustion chamber with a circle of bottom inclined air outlet holes as an example, at this height, the upper cylinder (equivalent to the combustion chamber) is transversely cut, and the cross-section is from top to bottom. The bottom inclined air outlet holes are evenly distributed on the cylinder wall 2-5 of the upper cylinder in this circle. At a position 20 where the bottom inclined air outlet holes need to be set as required by a certain design, which is located below the upper inclined air outlet position 19 in the figure, the combustion chamber tangent 16 and the combustion chamber radius 15 are perpendicular to each other. At this position, the punching device punches holes on the cylinder wall 2-5 of the upper cylinder along the air outlet direction 18-2 of the bottom inclined air outlet holes, forming the bottom inclined air outlet holes. The air outlet direction of the bottom inclined air outlet holes forms an inclination angle β (i.e., the second inclination angle) with the combustion chamber radius 15. After the processing and setting of a circle of bottom inclined air outlet holes, the air outlet direction of each bottom inclined air outlet hole is basically within the cross-section of the combustion chamber at this designed height, and the air outlet is within this cross-section. The inclination direction of each bottom inclined air outlet hole is the same, that is, it inclines from the combustion chamber radius 15 perpendicular to the combustion chamber tangent 16 passing through the bottom inclined air outlet hole to the air outlet direction 18-2 of the bottom inclined air outlet hole, thereby generating an inclination angle. Figure 10 The air outlet direction 18-2 in Figure 10 is called "clockwise air outlet". Since the air outlet direction of each bottom inclined air outlet hole is clockwise, the air outlet directions of a circle of bottom inclined air outlet holes (group) form a clockwise air outlet as a whole, forming a clockwise cyclone at the bottom of the combustion chamber, which is opposite to the counterclockwise cyclone direction at the top of the combustion chamber. Similarly, considering the accuracy of mechanical processing, there are differences in the sizes of the inclination angles β of each bottom inclined air outlet hole; the sizes of the two inclination angles are basically the same, and considering the accuracy of mechanical processing, the sizes of the two inclination angles may also be inconsistent.

[0044] In actual use, the air outlet directions of the upper inclined air outlet holes and the bottom inclined air outlet holes are opposite. If the air outlet direction of the upper circle of upper inclined air outlet holes is counterclockwise, then the air outlet direction of the bottom circle of bottom inclined air outlet holes is clockwise, and vice versa. If the air outlet direction of the upper inclined air outlet holes is clockwise, then the air outlet direction of the bottom inclined air outlet holes is counterclockwise. In this way, two different-direction cyclones can be formed in the combustion chamber; whether the respective inclination angles of the upper and bottom inclined air outlet holes are the same or different basically does not affect the formation of the two different-direction cyclones. According to needs, intermediate air outlet holes located in the middle position are set between the upper inclined air outlet holes and the bottom inclined air outlet holes, which are evenly distributed on the circumferential wall of the cylinder at their set heights, and the air outlet direction is the vertical direction, introducing vertical air outlet into the upper and lower cyclones to enhance the effect. There is a clear distance division between the three groups of air outlet holes. The upper inclined air outlet holes (group), the intermediate air outlet holes (group), and the bottom inclined air outlet holes (group) are respectively set on the circumference of the combustion chamber. In the vertical direction of the combustion chamber, the upper inclined air outlet holes, the intermediate air outlet holes, and the bottom inclined air outlet holes may be aligned, may not be aligned, or may be staggered, aiming to improve the final mixing effect of air and fuel oil mist and ensure sufficient combustion.

[0045] The applicant and the inventor conducted ignition experiments for this patent using existing equipment (such as a blower, a fuel tank, and an ignition device). Liquid wax was selected as the fuel. An upper inclined air outlet hole group, a middle air outlet hole group, and a bottom inclined air outlet hole group were respectively arranged from top to bottom on the barrel wall of the upper barrel. First, an oil mist was sprayed through the nozzle of the oil injection device (Danfoss nozzle 0.6), and an ignition needle was used for ignition. Then, the blower equipment (i.e., the blower) was turned on, and air was introduced through the air inlet pipe. When the cover cylinder 7 was removed, after ignition, when the blower was turned on, it could be seen that in this case, ignition could be achieved. However, once the blower was turned on, the incoming air blew out the flame, thick smoke rose, and continuous combustion could not be maintained, let alone flame adjustment. With the technical solution of this patent, that is, by installing the cover cylinder 7, an isolation between the channel hole 6 and the air inlet 5 was constructed through the cover cylinder 7. After ignition, when the blower was turned on, it could be seen that in this case, not only ignition was achieved, but also the flame continued to burn after the blower was turned on. It should be noted that after installing the cover cylinder 7, not only ignition was achieved, but also the flame continued to burn after the blower was turned on, indicating that it could be ignited under the condition of turning on the blower. After stabilizing the blower state, the small fire state could be maintained by adjusting the fuel consumption. In the experiment, five kilograms of water was used as the heating object, and the five kilograms of water was heated to boiling within 2 minutes. Ethylene glycol and methanol were selected as fuels, and Danfoss nozzles 1.25 and 2.5 were respectively selected. An upper inclined air outlet hole group and a bottom inclined air outlet hole group were respectively arranged from top to bottom on the barrel wall of the upper barrel. The above experimental method was used for ignition and air inlet experiments. The flame combustion situation was basically the same as the results of the above experiments, that is, after installing the cover cylinder 7, not only ignition was achieved, but also the flame continued to burn after the blower was turned on, indicating that it could be ignited under the condition of turning on the blower. After stabilizing the blower state, the small fire state could be maintained by adjusting the fuel consumption. Using five kilograms of water as the heating object, the five kilograms of water was heated to boiling within 2 minutes.

[0046] The design of installing the cover cylinder 7 cooperates with the previous "cyclone mixing combustion chamber". See the appendix Figure 6, the following functions and advantages are generated: (1) The air flowing upward through the ventilation holes 71 can drive the fuel oil mist ejected by the fuel injection device 3 to move upward. This enables the fuel oil mist in a small amount to be smoothly ignited and maintain a stable combustion state during ignition or in a low-fire state (i.e., a state with a small fuel injection volume); (2) The air flowing upward through the ventilation holes 7-1 can also carry away the heat around the top of the fuel injection device 3 upward, thereby cooling the top of the fuel injection device 3; (3) The air flowing upward through the ventilation holes 7-1 can form a synergistic effect with the air bulging out from the air outlet holes 2-1 on the wall of the upper cylinder 2, effectively preventing the adhesion between fuel oil mist particles and improving the combustion effect of the fuel; (4) After the fuel is ignited by the ignition, the blower is turned on, and the flame continues to burn stably. After maintaining a stable air volume, without changing the cooking habits of the chef, the operator can continue to use his hand or elbow or knee to adjust the fuel feed valve, thereby adjusting the fuel feed volume and realizing the adjustment and use of the flame. It should be noted that under the condition of the full power of the 120W blower, the applicant and the inventor found through experiments that stable ignition and combustion can be achieved, and the adjustment of the flame can be realized by directly adjusting the fuel feed valve without adjusting the air volume anymore. Existing fuel stoves adopt a preset air-fuel ratio, that is, both the air intake volume and the fuel intake volume are preset and used according to the preset values in the experimental situation during use, which restricts and hinders the flexible operation of the chef; while the technical solution of this patent can avoid the preset restriction without changing the cooking habits of the chef. After the flame is stable, only the fuel inlet valve needs to be adjusted, and at the same time, the use and damage of the electronic control equipment in the preset scheme are avoided.

[0047] An ignition needle 8 is provided on the fuel stove. The ignition needle 8 is vertically installed through the base cylinder 1 and the upper cylinder 2, that is, a corresponding first ignition needle installation hole 1-2 is provided on the bottom surface of the base cylinder 1, and a second ignition needle installation hole 2-4 corresponding to the first ignition needle installation hole 12 is provided on the bottom surface of the upper cylinder 2. In addition, a circular groove 2-3 (see Figure 1 and Figure 3 ) and an ignition needle installation platform 2-5 are also provided on the bottom surface of the upper cylinder 2. The ignition needle 8 is installed on the ignition probe installation platform 2-5, and the height of the ignition needle installation platform 2-5 is higher than that of the groove 2-3. The groove 2-3 is used to store spilled soup and other substances. Since the height of the ignition needle installation platform 2-5 is higher than that of the groove 2-3, the spilled soup will not contact the ignition needle 8, thereby preventing the spilled soup from contacting the high-temperature ignition needle 8 when the ignition needle 8 is burned to a very high temperature, causing it to crack. Considering the actual operation situation of the chef, such as Figure 8As shown in the figure, it is considered to detachably arrange a top cap 8-1 on the top of the ignition needle to prevent it from being contaminated; a metal outer sleeve 8-2 is coaxially arranged outside the ignition needle, and the metal outer sleeve is vertically penetrated and installed on the base cylinder 1 and the upper cylinder 2, and the ignition needle is arranged in the metal outer sleeve. Based on these improvements and combined with the technical solution of the present utility model, only one ignition needle is selected, avoiding the dual ignition needle design for fuel stoves in the prior art, which not only reduces the cost of the ignition needle but also reduces the maintenance for the ignition needle.

[0048] An installation part for installing the fuel injection device 3 is arranged at the central position of the bottom of the base cylinder 1. In this embodiment, see the appendix Figure 2 , the installation part is a circular ring sheet body 9, the outer periphery of the circular ring sheet body is connected to the bottom of the base cylinder 1 through 3 connecting claws 9-1, and the 3 connecting claws 9-1 are evenly distributed in a circumferential manner on the outer periphery of the circular ring sheet body. An air inlet 5 is formed between two adjacent connecting claws, that is, 3 air inlets 5 are formed.

[0049] See the appendix Figure 4 , the fuel injection device 3 includes a base 3-1, a fuel injection nozzle 3-2 and a mounting nut 3-3. An oil inlet pipe 3-4 is arranged on the side of the base 3-1; during installation, the mounting nut 3-3 is installed on the base 3-1, so that the mounting nut 3-3 and the base 3-1 are clamped and fixed on the circular ring sheet body 9 of the base cylinder 1. At this time, the base 3-1 and the oil inlet pipe 3-4 are located in the air inlet pipe 1-1, one end of the oil inlet pipe 3-4 is connected to the base 3-1, and the other end extends out of the outer wall of the air inlet pipe; the fuel injection nozzle 3-2 and the mounting nut 3-3 are located above the bottom surface of the base cylinder 1. In the technical solution of this patent, the replacement of fuel injection nozzles of different sizes can be realized (for example, for liquid wax, Danfoss fuel injection nozzle 0.3 - 0.7; for ethylene glycol, Danfoss fuel injection nozzle 0.85 - 1.25; for methanol, Danfoss fuel injection nozzle 2.0 - 2.5). After selecting a certain specification of fuel injection nozzle, ignite and turn on the fan. After the flame is stable, adjust the fuel injection amount to adjust the flame. After replacing the fuel injection nozzle, continue this process.

[0050] It should be noted that after the above improvements to the stove, in actual use, on the basis of the above cyclone mixing combustion chamber, the upper part of the stove technology composed of a fire control ring, a heat preservation plate and a furnace chamber is retained. See the appendix Figure 7 , including a furnace chamber 13 and a heat preservation plate 12. The furnace chamber is connected to the cyclone mixing combustion chamber. The fire control ring 11 is located at the central position of the furnace chamber and the heat preservation plate. Its lower end is arranged at the upper part of the combustion chamber, and the top air outlet hole is located in the fire control ring.

[0051] For ease of explanation, in the embodiments, spatial relative terms such as "upper", "lower", "left", "right", etc. are used to describe the relationship of one element or feature shown in the figure relative to another element or feature. It should be understood that, in addition to the orientation shown in the figure, the spatial terms are intended to include different orientations during the use or operation of the device. For example, if the device in the figure is inverted, the element described as being "below" other elements or features will be positioned "above" other elements or features. Therefore, the exemplary term "lower" can include both upper and lower orientations. The device can be positioned in other ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein can be interpreted accordingly. Moreover, relational terms such as "first" and "second" are only used to distinguish one component with the same name from another, and do not necessarily require or imply any such actual relationship or order between these components.

[0052] The above has made an exemplary description of the present utility model. It should be noted that, without departing from the core of the present utility model, any simple deformation, modification, or equivalent replacement that can be made by those skilled in the art without creative labor falls within the protection scope of the present utility model.

Claims

1. Cyclone mixing combustion chamber, characterized in that: It includes a base cylinder, an upper cylinder and an oil injection device; The upper cylinder is installed on the base cylinder, and a cavity is formed between the two. The top of the upper cylinder is open, and a combustion chamber is formed inside the upper cylinder. The fuel injection device is installed at the bottom center of the base cylinder, and a channel hole is provided at the bottom center of the upper cylinder. The top fuel injection nozzle of the fuel injection device penetrates into the channel hole, so that the fuel mist sprayed by the top fuel injection nozzle of the fuel injection device can be sprayed upward to the combustion chamber through the channel hole for combustion; A cover cylinder is arranged between the channel hole at the bottom of the upper cylinder and the fuel injection device, the top fuel injection nozzle of the fuel injection device is located inside the cover cylinder, and a gap is left between the cover cylinder and the top fuel injection nozzle of the fuel injection device, and ventilation holes are arranged on the cover cylinder along its circumferential direction to realize the communication between the cavity and the gap; An air inlet is provided at the bottom of the base cylinder around the oil spray device, and an air outlet is provided on the cylinder wall of the upper cylinder. Upper oblique air outlets and bottom oblique air outlets are provided from top to bottom along the height direction of the cylinder wall of the upper cylinder, and each circle of air outlets is distributed on the circumference of the cylinder wall at their respective heights; From the perspective of the cross-section of the combustion chamber, the upper oblique air outlet holes and the bottom oblique air outlet holes discharge air within the cross-section of the combustion chamber at their respective set heights, and the air outlet directions of the two are opposite. If the air outlet direction of the upper oblique air outlet holes is counterclockwise, the air outlet direction of the bottom oblique air outlet holes is clockwise, and vice versa.

2. The cyclone mixing combustion chamber according to claim 1, characterized in that: A middle air outlet hole is arranged in the middle position between the upper oblique air outlet hole and the bottom oblique air outlet hole, and is evenly distributed on the circumference of the cylinder wall at the set height. The air outlet direction of the middle air outlet hole is vertical, and points to the center of the combustion chamber cross section at the set height.

3. The cyclone mixing combustion chamber according to claim 1 or 2, characterized in that: A top air outlet hole connected to the cavity is arranged on the top wall of the upper cylinder, and the air outlet direction thereof points to the direction of the central axis of the combustion chamber and forms an angle with the central axis.

4. The cyclone mixing combustion chamber according to claim 1 or 2, characterized in that: From the cross-section of the combustion chamber, for each upper oblique air outlet hole, there is a first inclination angle between the air outlet direction and the radius of the combustion chamber, and the radius of the combustion chamber is perpendicular to the tangent line of the combustion chamber at the location of the upper oblique air outlet hole; for each bottom oblique air outlet hole, there is a second inclination angle between the air outlet direction and the radius of the combustion chamber, and the radius of the combustion chamber is perpendicular to the tangent line of the combustion chamber at the location of the bottom oblique air outlet hole; the inclination directions of the first inclination angle and the second inclination angle are opposite, one is the inclination from the center of the combustion chamber to the right from the radius of the combustion chamber, and the other is the inclination from the center of the combustion chamber to the left from the radius of the combustion chamber.

5. The cyclone mixing combustion chamber according to claim 3, characterized in that: From the cross-section of the combustion chamber, for each upper oblique air outlet hole, there is a first inclination angle between the air outlet direction and the radius of the combustion chamber, and the radius of the combustion chamber is perpendicular to the tangent line of the combustion chamber at the location of the upper oblique air outlet hole; for each bottom oblique air outlet hole, there is a second inclination angle between the air outlet direction and the radius of the combustion chamber, and the radius of the combustion chamber is perpendicular to the tangent line of the combustion chamber at the location of the bottom oblique air outlet hole; the inclination directions of the first inclination angle and the second inclination angle are opposite, one is the inclination from the center of the combustion chamber to the right from the radius of the combustion chamber, and the other is the inclination from the center of the combustion chamber to the left from the radius of the combustion chamber.

6. The cyclone mixing combustion chamber according to claim 4, characterized in that: The first inclination angle of each upper oblique air outlet hole is the same or different; the second inclination angle of each bottom oblique air outlet hole is the same or different; the magnitudes of the first inclination angle and the second inclination angle are the same or different.

7. The cyclone mixing combustion chamber according to claim 5, characterized in that: The first inclination angle of each upper oblique air outlet hole is the same or different; the second inclination angle of each bottom oblique air outlet hole is the same or different; the magnitudes of the first inclination angle and the second inclination angle are the same or different.

8. The cyclone mixing combustion chamber according to claim 1 or 2, characterized in that: The oil injection device comprises a base, an oil injection nozzle and a mounting nut. An oil inlet pipeline is arranged on the side of the base. The mounting nut and the base are clamped and fixed on the mounting part of the base cylinder, and the oil injection nozzle is arranged on the base.

9. The cyclone mixing combustion chamber according to claim 3, characterized in that: The oil injection device comprises a base, an oil injection nozzle and a mounting nut. An oil inlet pipeline is arranged on the side of the base. The mounting nut and the base are clamped and fixed on the mounting part of the base cylinder, and the oil injection nozzle is arranged on the base.

10. The cyclone mixing combustion chamber according to claim 1 or 2, characterized in that: The ignition needle is installed vertically through the base cylinder and the upper cylinder. A corresponding first ignition needle installation hole is opened on the bottom surface of the base cylinder, and a second ignition needle installation hole corresponding to the first ignition needle installation hole is opened on the bottom surface of the upper cylinder.

11. The cyclone mixing combustion chamber according to claim 3, characterized in that: The ignition needle is installed vertically through the base cylinder and the upper cylinder. A corresponding first ignition needle installation hole is opened on the bottom surface of the base cylinder, and a second ignition needle installation hole corresponding to the first ignition needle installation hole is opened on the bottom surface of the upper cylinder.

12. The cyclone mixing combustion chamber according to claim 10, characterized in that: A top cap is detachably disposed on the top of the ignition needle.

13. The cyclone mixing combustion chamber according to claim 11, characterized in that: A top cap is detachably disposed on the top of the ignition needle.

14. The cyclone mixing combustion chamber according to claim 10, characterized in that: A metal jacket is coaxially arranged outside the ignition needle, and the metal jacket is vertically penetrated and installed on the base cylinder and the upper cylinder.

15. The cyclone mixing combustion chamber according to claim 11, 12 or 13, characterized in that: A metal jacket is coaxially arranged outside the ignition needle, and the metal jacket is vertically penetrated and installed on the base cylinder and the upper cylinder.

16. The cyclone mixing combustion chamber according to claim 1 or 2, characterized in that: A circle of grooves and an ignition needle mounting platform are arranged on the bottom surface of the upper cylinder. The ignition needle is mounted on the ignition probe mounting platform, and the height of the ignition needle mounting platform is higher than the grooves.

17. The cyclone mixing combustion chamber according to claim 3, characterized in that: A circle of grooves and an ignition needle mounting platform are arranged on the bottom surface of the upper cylinder. The ignition needle is mounted on the ignition probe mounting platform, and the height of the ignition needle mounting platform is higher than the grooves.

18. The cyclone mixing combustion chamber according to claim 8, characterized in that: A circle of grooves and an ignition needle mounting platform are arranged on the bottom surface of the upper cylinder. The ignition needle is mounted on the ignition probe mounting platform, and the height of the ignition needle mounting platform is higher than the grooves.

19. The cyclone mixing combustion chamber according to claim 10, characterized in that: A circle of grooves and an ignition needle mounting platform are arranged on the bottom surface of the upper cylinder. The ignition needle is mounted on the ignition probe mounting platform, and the height of the ignition needle mounting platform is higher than the grooves.

20. The cyclone mixing combustion chamber according to claim 11, 12, 13 or 14, characterized in that: A circle of grooves and an ignition needle mounting platform are arranged on the bottom surface of the upper cylinder. The ignition needle is mounted on the ignition probe mounting platform, and the height of the ignition needle mounting platform is higher than the grooves.

21. The cyclone mixing combustion chamber according to claim 15, characterized in that: A circle of grooves and an ignition needle mounting platform are arranged on the bottom surface of the upper cylinder. The ignition needle is mounted on the ignition probe mounting platform, and the height of the ignition needle mounting platform is higher than the grooves.

22. The cyclone mixing combustion chamber according to claim 1 or 2, characterized in that: A mounting portion for mounting the oil injection device is provided at the bottom center of the base cylinder. The mounting portion is a circular ring sheet body. The outer periphery of the circular ring sheet body is connected to the bottom of the base cylinder body through a connecting claw, and the air inlet is formed between two adjacent connecting claws.

23. The cyclone mixing combustion chamber according to claim 3, characterized in that: A mounting portion for mounting the oil injection device is provided at the bottom center of the base cylinder. The mounting portion is a circular ring sheet body. The outer periphery of the circular ring sheet body is connected to the bottom of the base cylinder body through a connecting claw, and the air inlet is formed between two adjacent connecting claws.

24. The cyclone mixing combustion chamber according to claim 8, characterized in that: A mounting portion for mounting the oil injection device is provided at the bottom center of the base cylinder. The mounting portion is a circular ring sheet body. The outer periphery of the circular ring sheet body is connected to the bottom of the base cylinder body through a connecting claw, and the air inlet is formed between two adjacent connecting claws.

25. The cyclone mixing combustion chamber according to claim 10, characterized in that: A mounting portion for mounting the oil injection device is provided at the bottom center of the base cylinder. The mounting portion is a circular ring sheet body. The outer periphery of the circular ring sheet body is connected to the bottom of the base cylinder body through a connecting claw, and the air inlet is formed between two adjacent connecting claws.

26. The cyclone mixing combustion chamber according to claim 15, characterized in that: A mounting portion for mounting the oil injection device is provided at the bottom center of the base cylinder. The mounting portion is a circular ring sheet body. The outer periphery of the circular ring sheet body is connected to the bottom of the base cylinder body through a connecting claw, and the air inlet is formed between two adjacent connecting claws.

27. The cyclone mixing combustion chamber according to claim 20, characterized in that: A mounting portion for mounting the oil injection device is provided at the bottom center of the base cylinder. The mounting portion is a circular ring sheet body. The outer periphery of the circular ring sheet body is connected to the bottom of the base cylinder body through a connecting claw, and the air inlet is formed between two adjacent connecting claws.

28. A fuel stove using the cyclone mixing combustion chamber as claimed in any one of claims 1 to 27, characterized in that: The utility model comprises a furnace and a heat preservation plate arranged in the furnace, the furnace is connected with a cyclone mixing combustion chamber, and a fire control ring is arranged on the upper part of the combustion chamber.

29. The oil stove according to claim 28, characterized in that: The top air outlet is located in the fire control ring.

30. The oil stove according to claim 28 or 29, characterized in that: The fire control ring is located in the center of the furnace and the insulation plate.

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