Fuel oil centrifugal atomization combustion device

Abstract

The utility model provides a fuel oil centrifugal atomization combustion device, and belongs to the technical field of cooking utensils. The fuel oil centrifugal atomization combustion device comprises a combustor outer bowl, a combustor inner bowl, an ignition needle, an oil spraying pipe, a centrifugal atomization assembly and an air door assembly, the combustor inner bowl is embedded in the combustor outer bowl, the air door assembly is connected to the lower end of the combustor outer bowl, and the oil spraying pipe penetrates through the air door assembly to enter the centrifugal atomization assembly. The lower end of the air door assembly is connected with an air inlet mechanism, the air inlet mechanism comprises an air collecting barrel, a fan shell, a motor support and a motor, the upper end of the air collecting barrel is connected with the lower end of the air door assembly, the motor support is connected to the lower end of the air collecting barrel, the fan shell is connected to the lower end of the motor support, and the motor is located in the air collecting barrel and fixed through the motor support. The motor is a double-output-shaft motor, and a lower output shaft of the motor is connected with a fan blade assembly. The motor is integrated into the combustion device and is matched with the air door on the air collection barrel to adjust the air inlet amount, so that the purposes of randomly adjusting the flame size and fully combusting are achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of stoves and relates to a fuel centrifugal atomization combustion device. Background Art

[0002] At present, kitchen equipment and small stoves generally use burner preheating, oil pump high-pressure spraying and high-power fan pneumatic atomization functions. Usually, they have disadvantages such as low combustion efficiency, high noise, low flame temperature, and cumbersome installation. China Patent has disclosed a patent named "Fuel Atomization Burner" [Application No. 201921003534.4]. Its technical solution is to install a motor in the wind body shell to drive the centrifugal head and vaporization cup to rotate, and the fuel is sprayed into the centrifugal head and vaporization cup to make it centrifugally atomized. The disadvantage is that the built-in motor only drives the centrifugal head and vaporization cup to rotate, but it is still necessary to set up a fan outside to introduce air. The air enters the combustion chamber under the action of the wind and mixes with the atomized fuel. Its characteristics are good oil and gas mixing and good combustion effect. However, the disadvantage is that the external fan cannot meet the correct air ratio with the fuel, which affects the combustion effect and ignition success rate; the fan is externally located on the bottom side, and when the damper is fully closed during use, the centrifugal motor will be in a completely enclosed high-temperature state, causing the motor to be overheated and damaged; the external fan is also very troublesome to install and maintain. Utility Model Content

[0003] The purpose of the utility model is to solve the above-mentioned problems in the existing technology and propose a fuel centrifugal atomization combustion device, which integrates the motor of the air inlet mechanism into the combustion device, and cooperates with the air door on the wind collecting tube to adjust the air inlet volume, so that when the main fire adjusts the oil volume under high wind pressure, the flame can still remain stable and not float or extinguish, thereby achieving the purpose of freely adjusting the flame size and sufficient combustion.

[0004] The purpose of the utility model can be achieved through the following technical solutions: a fuel centrifugal atomization combustion device, including a burner outer bowl, a burner inner bowl, an ignition needle, an oil injection pipe, a centrifugal atomization component and an air door assembly, the burner inner bowl is embedded in the burner outer bowl, and is characterized in that the air door assembly is connected to the lower end of the burner outer bowl, the oil injection pipe passes through the air door assembly and enters the centrifugal atomization component, the lower end of the air door assembly is connected to an air intake mechanism, the air intake mechanism includes an air collecting cylinder, a fan housing, a motor bracket and a motor, the upper end of the air collecting cylinder is connected to the lower end of the air door assembly, the motor bracket is connected to the lower end of the air collecting cylinder, the fan housing is connected to the lower end of the motor bracket, the motor is located in the air collecting cylinder and is fixed by the motor bracket, the motor is a dual-output shaft motor, and a fan blade assembly is connected to the lower output shaft of the motor;

[0005] The ignition end of the ignition needle passes through the outer bowl of the burner and the inner bowl of the burner in sequence and is placed in the cavity of the inner bowl of the burner. The centrifugal atomization assembly includes a centrifugal cone and a vaporization cup. The centrifugal cone is fixed at the top of the vaporization cup. The upper output shaft of the motor is fixed to the centrifugal cone and drives the centrifugal cone to rotate. An annular gear ring is welded to the lower end of the vaporization cup, and a gap connecting the vaporization cup and the annular gear ring is provided to the inner bowl of the burner. A gap is provided between the annular gear ring and the inner bowl of the burner to form a high-pressure wind curtain wall. A plurality of ventilation pipes uniformly distributed circumferentially and with upper ports facing the annular gear ring are provided through the bottom of the outer bowl of the burner.

[0006] Furthermore, the damper assembly includes a damper body and a damper, the air collecting cylinder is sleeved on the outer side of the lower end of the damper body and embedded in it, the damper body has a sleeve in the center through which the output shaft of the power supply machine passes, the bottom of the damper body has a plurality of air holes evenly distributed circumferentially with the inner sleeve as the center, the damper sleeve rotates on the sleeve and has adjustment holes matching the air holes, a strip hole is opened on one side of the damper body, and a paddle passing through the strip hole is connected to one side of the damper.

[0007] The width of the adjustment hole is greater than the width of the paddle. By pushing the paddle horizontally, the damper can be rotated to adjust the air volume of the damper assembly. When the adjustment hole overlaps the air hole, the air volume reaches the maximum.

[0008] Furthermore, an oil inlet hole for the oil injection pipe to extend into is provided on one side of the damper body, and an oil return groove is provided at the bottom of the damper body, so that the residual oil or water of the burner can be dripped into the oil return groove for discharge, thereby preventing the oil and water from entering the air collecting cylinder and damaging the motor.

[0009] Furthermore, the inner bowl of the burner is covered with through holes, and the two rows of through holes at the bottom are inclined. The rotating wind generated by the oblique through holes causes the fire to rotate quickly and stably at the bottom of the combustion chamber to fully burn, which helps to start the main fire and burn quickly and stably, avoids explosion when turning the main fire on and off, and allows the main fire to remain stable when the oil volume is adjusted under high wind pressure, so as to achieve the purpose of freely adjusting the size of the flame.

[0010] Furthermore, the fan blade assembly includes an upper fan blade and a lower fan blade connected to the lower output shaft, and an air guide wheel is fixed in the fan housing, and the air guide wheel is located between the upper fan blade and the lower fan blade.

[0011] Furthermore, a fire stabilizing ring is fixed to the upper end of the inner bowl of the burner.

[0012] Furthermore, an air inlet is provided at the bottom of the fan housing.

[0013] Furthermore, an air outlet is provided at the connection between the air collecting tube and the air door body.

[0014] The inner cavity of the burner inner bowl is the combustion chamber. The motor is started and double-blade supercharging is adopted. The air enters from the bottom of the fan housing and is supplied axially to increase the wind pressure entering the combustion chamber. The pressurized air passes through the motor bracket, takes away the heat emitted by the motor, and plays a role in cooling the motor. Then the air passes through the damper assembly and enters the upper burner outer bowl. Part of the air directly enters the combustion chamber of the burner inner bowl from the ventilation pipe. The gap between the annular gear ring and the bottom of the burner inner bowl forms a high-pressure wind curtain wall, which isolates the flame invasion outside the vaporization cup, making the vaporization cup a flameless oil-gas and air mixing area, further effectively preventing flashback. The other part of the air is mixed with the atomized oil and gas and enters the combustion chamber from the through hole of the burner inner bowl. The motor drives the centrifugal cone and the vaporizer cup to rotate at the same time. The fuel injection nozzle at the front end of the fuel injection pipe is located in the vaporizer cup and sprays oil directly at the outer wall of the centrifugal cone. The oil film moves upward by the action of centrifugal force, and spreads into oil mist at the highest point, which is sprinkled on the inner wall of the vaporizer cup. The oil film adheres to the inner wall of the vaporizer cup and continues to spread under the action of centrifugal force. The oil film becomes thinner and moves down to the lower part of the vaporizer cup, and flows into the annular gear ring from the gap. The annular gear ring is used to crush and atomize the oil film, and finally mixes with the air coming out of the high-pressure wind curtain wall, and ignites quickly when it encounters the ignition of the ignition needle. Because the vaporizer cup is still in a cold state at the beginning of ignition, as the vaporizer cup is surrounded by flames and heats up rapidly, the oil film on the inner wall of the vaporizer cup is instantly vaporized and mixed with the air supplied by the air inlet mechanism, and then transformed into a hot mixed oil and gas, and enters the premixing ring cavity between the inner bowl and the outer bowl of the burner for further rotation and mixing, and finally sprays into the combustion chamber from the through hole of the inner bowl of the combustion chamber and burns. Combustion causes the temperature of the vaporizer cup to rise rapidly. When the oil film in the vaporizer cup is vaporized in time, the oil mist will stop flowing out from the gap between the vaporizer cup and the annular gear ring, and the bottom flame will automatically disappear. As a result, the mixed gas can only be completely burned in the combustion chamber, the flame is blue-purple, and the combustion temperature reaches above 1300℃.

[0015] Compared with the prior art, this fuel centrifugal atomization combustion device has the following advantages:

[0016] 1. A small number of air outlets are arranged at the connection between the damper body and the wind collecting tube, so that high-pressure air can blow directly around the bottom of the outer bowl of the burner, reducing the temperature of the outer bowl of the burner during operation; the air outlets can also allow high-speed air to continue to surround the motor and cool the motor when the damper is completely closed, preventing the motor from being damaged by high-temperature radiation in the wind collecting tube.

[0017] 2. Integrate the air intake mechanism into the combustion device, and cooperate with the damper on the wind collecting tube to adjust the air intake volume, so that the flame can remain stable and not float or extinguish when the oil volume is adjusted under high wind pressure, so as to achieve the purpose of freely adjusting the flame size and sufficient combustion.

[0018] 3. There is a gap between the vaporizer cup and the annular gear ring. Specifically, several raised welding points can be designed on the surface of the annular gear ring. When the machine is turned on and ignited, the vaporizer cup runs at high speed, and the oil film will be thrown out from the gap between the vaporizer cup and the annular gear ring. It will be atomized at high speed after passing through the atomizer teeth on the annular gear ring, and will be quickly ignited when encountering the ignition arc. This solves the problem of difficulty in igniting high-flash point fuels, and also solves the problem of residual oil smoking due to failure to ignite in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a cross-sectional view of the fuel centrifugal atomization combustion device.

[0020] Figure 2 It is a schematic diagram of the structure of the burner outer bowl.

[0021] Figure 3 It is a structural diagram of the annular gear ring.

[0022] Figure 4 It is a bottom view of the damper assembly.

[0023] Figure 5 It is a cross-sectional view of the damper assembly.

[0024] In the figure, 1. burner outer bowl; 2. burner inner bowl; 21. through hole; 3. ignition needle; 4. centrifugal atomization component; 41. centrifugal cone; 42. vaporization cup; 43. annular gear ring; 44. gap; 45. ventilation pipe; 46. gap; 5. damper assembly; 51. damper body; 52. damper; 53. bushing; 54. air hole; 55. adjustment hole; 56. paddle; 57. oil inlet clearance hole; 58. oil return groove; 6. air inlet mechanism; 61. air collecting tube; 62. fan housing; 63. motor bracket; 64. motor; 641. lower output shaft; 642. upper output shaft; 65. upper wind blade; 66. lower wind blade; 67. wind guide wheel; 68. air inlet; 69. air outlet; 7. fire stabilizing ring; 8. fuel injection pipe. DETAILED DESCRIPTION

[0025] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0026] like Figure 1 As shown, the fuel centrifugal atomization combustion device comprises a burner outer bowl 1, a burner inner bowl 2, an ignition needle 3, an oil injection pipe 8, a centrifugal atomization component 4 and a damper assembly 5, wherein the burner inner bowl 2 is embedded in the burner outer bowl 1. The damper assembly 5 is connected to the lower end of the burner outer bowl 1, and the oil injection pipe 8 passes through the damper assembly 5 and enters the centrifugal atomization component 4. The lower end of the damper assembly 5 is connected to an air inlet mechanism 6, and the upper end of the burner inner bowl 2 is also fixed with a fire stabilizing ring 7.

[0027] The air inlet mechanism 6 includes an air collecting tube 61, a fan housing 62, a motor bracket 63 and a motor 64. The upper end of the air collecting tube 61 is connected to the lower end of the damper assembly 5, the motor bracket 63 is connected to the lower end of the air collecting tube 61, the fan housing 62 is connected to the lower end of the motor bracket 63, the motor 64 is located in the air collecting tube 61 and is fixed by the motor bracket 63, the motor 64 is a double output shaft motor 64, and a fan blade assembly is connected to the lower output shaft 641 of the motor 64. The fan blade assembly includes an upper fan blade 65 and a lower fan blade 66 connected to the lower output shaft 641, and a guide wheel 67 is also fixed in the fan housing 62, and the guide wheel 67 is located between the upper fan blade 65 and the lower fan blade 66. An air inlet 68 is opened at the bottom of the fan housing 62, and an air outlet 69 is provided at the connection between the air collecting tube 61 and the damper body 51.

[0028] like Figure 2 , Figure 3 As shown, the ignition end of the ignition needle 3 passes through the burner outer bowl 1 and the burner inner bowl 2 in sequence and is placed in the cavity of the burner inner bowl 2, the centrifugal atomization assembly 4 includes a centrifugal cone 41 and a vaporization cup 42, the centrifugal cone 41 is fixed at the top of the vaporization cup 42, the upper output shaft 642 of the motor 64 is fixed to the centrifugal cone 41 and drives the centrifugal cone 41 to rotate, an annular gear ring 43 is welded to the lower end of the vaporization cup 42, and a gap 46 connecting the burner inner bowl 2 is provided between the vaporization cup 42 and the annular gear ring 43, a gap 44 that can form a high-pressure wind curtain wall is provided between the annular gear ring 43 and the burner inner bowl 2, and a plurality of ventilation pipes 45 that are evenly distributed circumferentially and whose upper ports face the annular gear ring 43 are provided through the bottom of the burner outer bowl 1.

[0029] like Figure 4 , Figure 5 As shown, the damper assembly 5 includes a damper body 51 and a damper 52. The air collecting cylinder 61 is sleeved on the outer side of the lower end of the damper body 51 and is embedded in it. The center of the damper body 51 has a sleeve 53 through which the upper output shaft 642 of the power supply machine 64 passes. The bottom of the damper body 51 is provided with a plurality of air holes 54 uniformly distributed circumferentially with the inner sleeve 53 as the center. The damper 52 is sleeved on the sleeve 53 for rotation and has an adjustment hole 55 matching the air hole 54. A strip hole is provided on one side of the damper body 51, and a paddle 56 passing through the strip hole is connected to one side of the damper 52.

[0030] The width of the adjustment hole 55 is greater than that of the paddle 56. By pushing the paddle 56 laterally, the damper 52 can be rotated to adjust the air volume of the damper assembly 5. When the adjustment hole 55 overlaps with the air hole 54, the air volume reaches a maximum.

[0031] The damper body 51 has an oil inlet hole 57 for the oil injection pipe 8 to extend into on one side, and an oil return groove 58 is provided at the bottom of the damper body 51. The residual oil or water of the burner can be dripped into the oil return groove 58 for discharge, so as to prevent the oil and water from entering the air collecting cylinder 61 and damaging the motor 64.

[0032] The inner bowl 2 of the burner is covered with through holes 21, and the two rows of through holes 21 at the bottom are inclined. The rotating wind generated by the oblique through holes 21 prompts the fire to rotate and burn fully at the bottom of the combustion chamber quickly and stably, which helps to start the main fire and burn quickly and stably, avoids deflagration when turning the main fire on and off, and allows the main fire to remain stable when the oil volume is adjusted under high wind pressure, so as to achieve the purpose of freely adjusting the size of the flame.

[0033] Working principle: The inner cavity of the burner inner bowl 2 is the combustion chamber. The motor 64 is started and double-blade supercharging is adopted. The air enters from the bottom of the fan housing 62 and is supplied axially to increase the wind pressure entering the combustion chamber. The pressurized air passes through the motor bracket 63, takes away the heat emitted by the motor 64, and plays a role in cooling the motor 64. Then the air passes through the damper assembly 5 and enters the upper burner outer bowl 1. A part of the air directly enters the combustion chamber of the burner inner bowl 2 from the ventilation pipe 45. The gap 44 between the annular gear ring 43 and the bottom of the burner inner bowl 2 forms a high-pressure wind curtain wall, isolating the flame invasion outside the vaporization cup 42, making the vaporization cup 42 a flameless oil-gas and air mixing area, further effectively preventing backfire. Another part of the air is mixed with the atomized oil and gas and enters the combustion chamber from the through hole 21 of the burner inner bowl 2. The motor 64 drives the centrifugal cone 41 and the vaporization cup 42 to rotate at the same time. The fuel injection nozzle at the front end of the fuel injection pipe 8 is located in the vaporization cup 42 and sprays fuel toward the outer wall of the centrifugal cone 41. The oil film is formed by the centrifugal force and moves upward. At the highest point, it diffuses into oil mist and is sprinkled on the inner wall of the vaporization cup 42. It adheres to the inner wall of the vaporization cup 42 and continues to diffuse under the action of centrifugal force. The oil film becomes thinner and moves downward to the lower part of the vaporization cup 42, and flows into the annular gear ring 43 from the gap 46. The annular gear ring 43 is used to crush and atomize the oil film, and finally it is mixed with the air coming out of the high-pressure wind curtain wall and ignites quickly when it encounters the ignition of the ignition needle 3. Because the ignition has just started, the vaporization cup 42 is still in a cold state. As the vaporization cup 42 is surrounded by the flame, it heats up rapidly, so that the oil film on the inner wall of the vaporization cup 42 is instantly vaporized and mixed with the air supplied by the air inlet mechanism 6, and then transformed into hot mixed oil and gas, which enters the premixing annular cavity between the inner bowl 2 of the burner and the outer bowl 1 of the burner for further rotation and mixing, and finally sprays into the combustion chamber from the through hole 21 of the inner bowl of the combustion chamber and burns. The combustion causes the temperature of the vaporization cup 42 to rise rapidly. When the oil film in the vaporization cup 42 is vaporized in time, the oil mist will stop flowing out of the gap 46 between the vaporization cup 42 and the annular gear ring 43, and the bottom flame disappears automatically. As a result, the mixed gas can only be completely burned in the combustion chamber, the flame is blue-purple, and the combustion temperature reaches above 1300°C.

[0034] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A fuel centrifugal atomization combustion device, comprising a burner outer bowl, a burner inner bowl, an ignition needle, a fuel injection pipe, a centrifugal atomization component and a damper assembly, wherein the burner inner bowl is embedded in the burner outer bowl, and is characterized in that: The damper assembly is connected to the lower end of the burner outer bowl, the fuel injection pipe passes through the damper assembly and enters the centrifugal atomization assembly, the lower end of the damper assembly is connected to an air inlet mechanism, the air inlet mechanism includes an air collecting cylinder, a fan housing, a motor bracket and a motor, the upper end of the air collecting cylinder is connected to the lower end of the damper assembly, the motor bracket is connected to the lower end of the air collecting cylinder, the fan housing is connected to the lower end of the motor bracket, the motor is located in the air collecting cylinder and is fixed by the motor bracket, the motor is a dual-output shaft motor, and a fan blade assembly is connected to the lower output shaft of the motor; The ignition end of the ignition needle passes through the outer bowl of the burner and the inner bowl of the burner in sequence and is placed in the cavity of the inner bowl of the burner. The centrifugal atomization assembly includes a centrifugal cone and a vaporization cup. The centrifugal cone is fixed at the top of the vaporization cup. The upper output shaft of the motor is fixed to the centrifugal cone and drives the centrifugal cone to rotate. An annular gear ring is welded to the lower end of the vaporization cup, and a gap connecting the vaporization cup and the annular gear ring is provided to the inner bowl of the burner. A gap is provided between the annular gear ring and the inner bowl of the burner to form a high-pressure wind curtain wall. A plurality of ventilation pipes uniformly distributed circumferentially and with upper ports facing the annular gear ring are provided through the bottom of the outer bowl of the burner.

2. A fuel centrifugal atomization combustion device according to claim 1, characterized in that: The damper assembly includes a damper body and a damper. The air collecting cylinder is sleeved on the outer side of the lower end of the damper body and embedded in it. The center of the damper body has a sleeve through which the output shaft of the power supply machine passes. The bottom of the damper body has a plurality of air holes evenly distributed circumferentially with the inner sleeve as the center. The damper sleeve rotates on the sleeve and has adjustment holes matching the air holes. A strip hole is provided on one side of the damper body, and a paddle passing through the strip hole is connected to one side of the damper.

3. A fuel centrifugal atomization combustion device according to claim 2, characterized in that: An oil inlet clearance hole for the oil injection pipe to extend into is opened on one side of the air door body, and an oil return groove is opened at the bottom of the air door body.

4. A fuel centrifugal atomization combustion device according to claim 1, characterized in that: The inner bowl of the burner is covered with through holes, and two rows of through holes at the bottom are arranged in an inclined manner.

5. A fuel centrifugal atomization combustion device according to claim 1, characterized in that: The fan blade assembly comprises an upper fan blade and a lower fan blade connected to the lower output shaft. An air guide wheel is also fixed in the fan housing, and the air guide wheel is located between the upper fan blade and the lower fan blade.

6. A fuel centrifugal atomization combustion device according to claim 1, characterized in that: A fire stabilizing ring is also fixed on the upper end of the inner bowl of the burner.

7. A fuel centrifugal atomization combustion device according to claim 1, characterized in that: An air inlet is provided at the bottom of the fan housing.

8. A fuel centrifugal atomization combustion device according to claim 7, characterized in that: An air outlet is arranged at the connection between the air collecting cylinder and the air door body.

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