A fuel heater

Abstract

This invention relates to the field of fuel heater technology, specifically providing a fuel heater including a fuel tank, a combustion chamber, a magnetically levitated piston pump, and an ignition structure. The ignition structure includes a connecting pipe and a fuel nozzle. One end of the combustion chamber has an air inlet, and the connecting pipe is installed on the combustion chamber directly opposite the air inlet. The end of the connecting pipe facing the combustion chamber is open, and the fuel nozzle is installed at the open structure. The magnetically levitated piston pump, combined with the internal structure of the connecting pipe, enables both air and fuel supply, achieving complete combustion. This structure is relatively simple and helps reduce costs. Furthermore, oxygen is directly delivered to the air passage of the connecting pipe through the air inlet pipe, and the small space in the air inlet pipe and air passage reduces the risk of leakage, thus improving the fuel mist combustion effect to a certain extent.

Description

Technical Field

[0001] This invention relates to the field of fuel oil heater technology, and more specifically, to a fuel oil heater. Background Technology

[0002] Fuel heaters, also known as fuel forced convection air heaters, typically work by supplying fuel through an oil pump or air pump, injecting fuel into the combustion chamber through a fuel injector, atomizing the fuel into a mist, and igniting the mist through an ignition device. The mist then burns inside the combustion chamber, and the heat is blown out by a fan to provide heating.

[0003] In the prior art, a sliding vane centrifugal air pump is generally installed in the heater to supply air and oxygen. The sliding vane centrifugal air pump is connected to a motor, and one end of the air chamber outlet of the sliding vane centrifugal air pump is connected to a flame stabilizer plate or an oil nozzle seat. The oil nozzle is installed on the flame stabilizer plate or the oil nozzle seat.

[0004] However, in the above structure, the sliding vane centrifugal air pump and motor supply air, and the oil supply is carried out using the siphon principle. This places high demands on the power of the motor, and the motor power must be increased to support the fan blades and air pump, resulting in higher costs. In addition, during use, oxygen usually reaches the ignition device through the air chamber. The large internal space of the air chamber makes it prone to air leakage, which will cause the air pressure to drop, reducing the efficiency of oil mist combustion and easily leading to abnormal combustion. Summary of the Invention

[0005] The problem solved by this invention is that the existing fuel heaters have a relatively complex structure for supplying oil and gas, which leads to high costs and is prone to abnormal combustion.

[0006] To address the above problems, the present invention proposes the following technical solution:

[0007] A fuel heater includes a fuel tank, a combustion chamber, a magnetically levitated piston pump, and an ignition structure. The ignition structure includes a connecting pipe and a fuel nozzle. One end of the combustion chamber has an air inlet. The connecting pipe is installed on the combustion chamber directly opposite the air inlet. The end of the connecting pipe facing the combustion chamber is open, and the fuel nozzle is installed at the open end. An oil passage is provided in the middle of the connecting pipe, and an air passage is provided inside the connecting pipe outside the oil passage. The end of the connecting pipe away from the combustion chamber is sealed. The fuel tank is connected to the connecting pipe via an inlet pipe, and the inlet pipe is connected to the oil passage. The magnetically levitated piston pump is connected to the connecting pipe via an air inlet pipe, and the air inlet pipe is connected to the air passage.

[0008] The present invention provides a fuel heater, which, compared with the prior art, has, but is not limited to, the following advantages:

[0009] Beneficial effects:

[0010] During operation, the magnetic levitation piston air pump delivers oxygen into the air passage through the intake pipe. Since the oil passage is located in the middle of the air passage, the flow of air through the connecting pipe creates a negative pressure in the middle of the air passage, thus creating a negative pressure at the oil passage. This draws fuel from the tank into the oil passage through the fuel inlet pipe. When the fuel passes through the connecting pipe and is ejected from the nozzle at the air inlet of the combustion chamber, the air pressure generated by the magnetic levitation piston air pump disperses the fuel at the nozzle and propels it into the combustion chamber, atomizing the fuel into an oil mist. This ensures complete combustion of the fuel within the combustion chamber. The magnetic levitation piston air pump, combined with the internal structure of the connecting pipe, provides both air and fuel supply, achieving complete combustion. This simple structure helps reduce costs. Furthermore, the direct delivery of oxygen through the intake pipe into the air passage of the connecting pipe, with its small space, reduces the risk of leakage, further improving the oil mist combustion effect.

[0011] Preferably, the ignition structure further includes an oil passage, which is installed inside the connecting pipe. The oil passage has an internal oil passage, and the outer wall of the oil passage and the inner wall of the connecting pipe enclose the gas passage.

[0012] Preferably, the ignition structure further includes a flame stabilizer and an ignition device. The flame stabilizer is installed on the combustion cylinder at a position directly opposite the air inlet. The connecting pipe is installed in the middle of the flame stabilizer. The ignition device is installed on the flame stabilizer, and the ignition head of the ignition device is close to the fuel nozzle.

[0013] Preferably, the magnetic levitation piston air pump includes a housing, a dual-channel motor, a magnetic levitation piston movable shaft, an air chamber rubber sheet, and an air outlet. The dual-channel motor is installed inside the housing. The magnetic levitation piston movable shaft is mounted on the middle of two electromagnetic coils on the dual-channel motor. The dual-channel motor drives the magnetic levitation piston movable shaft to perform reciprocating motion. A compressed air chamber and an inlet air chamber and an outlet air chamber, respectively connected to the two ends of the compressed air chamber, are provided at one end of the magnetic levitation piston movable shaft inside the housing. The outlet air chamber is connected to the air outlet via a connecting pipe. The end of the compressed air chamber facing the magnetic levitation piston movable shaft has a movable opening. The air chamber rubber sheet is installed at the movable opening and faces the magnetic levitation piston movable shaft.

[0014] Preferably, the magnetic levitation piston air pump further includes an inlet valve and an outlet valve. An inlet port is connected between the compressed air chamber and the inlet air chamber, and the inlet valve is installed in the inlet port. An outlet port is connected between the compressed air chamber and the outlet air chamber, and the outlet valve is installed in the outlet port. When the inlet valve is open, the outlet valve is closed; when the inlet valve is closed, the outlet valve is open.

[0015] Preferably, there are two compressed air chambers, which are respectively located at both ends of the moving shaft of the magnetic levitation piston. Correspondingly, there are two air chamber rubber sheets, two air inlet chambers, two air outlet chambers, two connecting air pipes, two air inlet valves, and two air outlet valves. A main air outlet chamber is provided inside the housing, and both connecting air pipes are connected to the main air outlet chamber. An air outlet nozzle is installed on the main air outlet chamber.

[0016] Preferably, the fuel heater further includes a housing, a support frame, a motor, a fan, and a mesh cover. The housing is used to cover the outside of the combustion cylinder, and the support frame is used to support the housing on the fuel tank.

[0017] The motor is used to drive the fan to rotate. Both the motor and the fan are disposed inside the housing, and the fan is positioned facing the air inlet of the combustion cylinder. The mesh cover is used to be installed on the end of the combustion cylinder near the fan.

[0018] Preferably, the fuel heater further includes an indirect combustion chamber structure, which includes a combustion chamber inner cylinder, a combustion chamber outer cylinder, a combustion chamber connecting pipe, and an exhaust pipe. The combustion chamber inner cylinder is used to cover the outside of the combustion cylinder, and the combustion chamber outer cylinder is used to cover the outside of the combustion chamber inner cylinder. The combustion chamber inner cylinder and the combustion chamber outer cylinder together form a sealed exhaust space. The side wall of the combustion cylinder is connected to the combustion chamber inner cylinder through the combustion chamber connecting pipe, and the exhaust pipe is connected to the combustion chamber outer cylinder.

[0019] Preferably, the indirect combustion chamber structure further includes a smoke exhaust port sleeve, a through hole is provided on the upper side wall of the outer shell, the smoke exhaust pipe is used to pass through the through hole, and the smoke exhaust port sleeve is provided on the upper outer wall of the outer shell and covers the outside of the smoke exhaust pipe.

[0020] Preferably, the upper end of the exhaust port sleeve is higher than the upper end of the exhaust pipe, and the circumferential sidewall of the exhaust port sleeve is provided with a plurality of diffuser holes at uniform intervals, the height of the diffuser holes being the same as the upper end of the exhaust pipe.

[0021] Preferably, the fuel heater further includes a direct combustion chamber structure, which includes a mask fixing plate and a mask. The end of the combustion cylinder away from the air inlet is open. The mask fixing plate is used to be disposed inside the combustion cylinder near the opening. The middle part of the mask fixing plate is an exhaust port. The edge of the mask has a connecting structure. The mask is disposed at the exhaust port through the connecting structure and is spaced apart from the mask fixing plate.

[0022] Preferably, the middle part of the mask is convex, and the concave surface of the mask is oriented towards the exhaust port.

[0023] Preferably, the fuel heater further includes an inlet filter pipe, which is installed inside the fuel tank and connected to the inlet pipe. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of a fuel oil heater with an indirect combustion chamber according to an embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of the overall exploded structure of a fuel heater with an indirect combustion chamber according to an embodiment of the present invention;

[0026] Figure 3 Embodiments of the present invention Figure 2 Enlarged view of a portion of point A in the middle;

[0027] Figure 4 This is a schematic cross-sectional view of the fuel oil heater with an indirect combustion chamber structure according to an embodiment of the present invention.

[0028] Figure 5 Embodiments of the present invention Figure 4 Enlarged view of a portion of point B in the middle;

[0029] Figure 6 This is a schematic diagram of the overall exploded structure of a fuel heater with a direct combustion chamber according to an embodiment of the present invention;

[0030] Figure 7 This is a schematic diagram of the magnetic levitation piston air pump structure according to an embodiment of the present invention;

[0031] Figure 8 This is a schematic diagram of the internal structure of the magnetic levitation piston air pump according to an embodiment of the present invention.

[0032] Explanation of reference numerals in the attached figures:

[0033] 1. Fuel tank; 10. Oil mist; 11. Fuel inlet pipe; 12. Air inlet pipe; 2. Combustion cylinder; 20. Air inlet; 3. Magnetic levitation piston air pump; 30. Air inlet valve plate; 300. Air outlet valve plate; 3000. Air chamber external input port; 31. Engine housing; 32. Dual-channel motor; 33. Magnetic levitation piston movable shaft; 34. Air chamber rubber sheet; 35. Air outlet nozzle; 36. Compressed air chamber; 37. Air inlet chamber; 370. Air inlet port; 38. Air outlet chamber; 380. Air outlet port; 39. Connecting air pipe; 390. Main air outlet chamber; 4. Ignition structure; 41. Connecting pipe; 42. Fuel nozzle; 43. Fuel passage; 44. Air passage. 45 Oil pipe, 46 Flame stabilizer plate, 47 Ignition device, 5 Outer shell, 50 Perforation, 51 Support frame, 52 Motor, 53 Fan, 54 Mesh cover, 55 Oil inlet filter pipe, 56 Moving wheels, 57 Push handle, 6 Indirect combustion chamber structure, 61 Combustion chamber inner cylinder, 62 Combustion chamber outer cylinder, 63 Combustion chamber connecting pipe, 64 Exhaust pipe, 65 Exhaust space, 66 Exhaust port sleeve, 67 Diffuser hole, 68 Groove, 69 Cleaning cover, 690 Cleaning hole, 7 Direct combustion chamber structure, 71 Mask fixing plate, 72 Mask, 73 Exhaust port, 74 Connection structure, 75 Auxiliary heat insulation cylinder. Detailed Implementation

[0034] The embodiments of this application will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this application, but should not be used to limit the scope of this application.

[0035] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0036] It should be noted that in the XYZ coordinate system provided in this article, the positive direction of the X-axis represents the right, and the negative direction of the X-axis represents the left; the positive direction of the Y-axis represents the front, and the negative direction of the Y-axis represents the back; the positive direction of the Z-axis represents the top, and the negative direction of the Z-axis represents the bottom. The meanings of the Z-axis, X-axis, and Y-axis are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0037] See Figures 1-8This invention provides a fuel heater, comprising a fuel tank 1, a combustion chamber 2, a magnetically levitated piston pump 3, and an ignition structure 4. The ignition structure 4 includes a connecting pipe 41 and a fuel nozzle 42. One end of the combustion chamber 2 has an air inlet 20. The connecting pipe 41 is installed on the combustion chamber 2 at a position directly opposite the air inlet 20. The end of the connecting pipe 41 facing the combustion chamber 2 is open, and the fuel nozzle 42 is installed at the open structure. An oil passage 43 is provided in the middle of the connecting pipe 41, and an air passage 44 is provided inside the connecting pipe 41 outside the oil passage 43. The end of the connecting pipe 41 away from the combustion chamber 2 is sealed. The fuel tank 1 is connected to the connecting pipe 41 through an oil inlet pipe 11, and the oil inlet pipe 11 is connected to the oil passage 43. The magnetically levitated piston pump 3 is connected to the connecting pipe 41 through an air inlet pipe 12, and the air inlet pipe 12 is connected to the air passage 44.

[0038] In this embodiment, during operation, the magnetic levitation piston air pump 3 delivers oxygen through the air inlet pipe 12 into the air passage 44. Since the oil passage 43 is located in the middle of the air passage 44, when air is passed through the connecting pipe 41, a negative pressure is generated in the middle of the air passage 44, i.e., a negative pressure is formed at the oil passage 43. This draws fuel from the fuel tank 1 into the oil passage 43 through the fuel inlet pipe 11. When the fuel passes through the connecting pipe 41 and is sprayed from the fuel nozzle 42 at the air inlet 20 of the combustion chamber 2, the air pressure generated by the magnetic levitation piston air pump 3 forces the fuel through the fuel nozzle 42... The fuel is dispersed at two points and sprayed into the combustion chamber 2 to atomize the fuel into oil mist 10, so that the fuel can be fully burned in the combustion chamber 2. The magnetic levitation piston air pump 3, together with the internal structure of the connecting pipe 41, can supply both air and fuel. The combination of oil and gas achieves full combustion. This structure is relatively simple and helps to reduce costs. In addition, oxygen is directly delivered to the air passage 44 of the connecting pipe 41 through the air inlet pipe 12. The small space of the air inlet pipe 12 and the air passage 44 makes it less likely to have air leakage problems, thereby improving the combustion effect of the oil mist 10 to a certain extent.

[0039] See Figures 4-5 Preferably, the ignition structure 4 further includes an oil passage 45, which is installed inside the connecting pipe 41. The oil passage 45 has an oil passage 43 inside, and the outer wall of the oil passage 45 and the inner wall of the connecting pipe 41 enclose the gas passage 44.

[0040] In this embodiment, the oil pipe 45 provides a carrier for the oil passage 43 and the gas passage 44, enabling the magnetic levitation piston pump 3 to supply both gas and oil. This increases the fuel-fuel speed, allowing the fuel to be sprayed out through the nozzle 42 with finer atomized particles, which helps to make the fuel burn more completely and greatly improves combustion efficiency.

[0041] See Figures 2-5 Preferably, the ignition structure 4 further includes a flame stabilizer 46 and an ignition device 47. The flame stabilizer 46 is installed on the combustion cylinder 2 at a position directly opposite the air inlet 20. The connecting pipe 41 is installed in the middle of the flame stabilizer 46. The ignition device 47 is installed on the flame stabilizer 46, and the ignition head of the ignition device 47 is close to the fuel nozzle 42.

[0042] Specifically, the flame stabilizing plate 46 is provided with an air inlet and oxygen supply window and an air guide plate. The air inlet and oxygen supply window is fixed to the arc-shaped wing surface on the flame stabilizing plate 46, and the air guide plate is integrally formed with the flame stabilizing plate 46.

[0043] In this embodiment, the dispersed fuel forms the oil mist 10, which is then ignited and burned by the ignition device 47. Simultaneously, it is aided by oxygen supplied by the magnetic levitation piston pump 3, resulting in a more ideal mixture of the oil mist 10 and the oxygen supply, which is beneficial for improving the combustion effect. The flame stabilizer 46 helps to ensure that the combustion flame does not deflect.

[0044] See Figure 8 Preferably, the magnetic levitation piston air pump 3 includes a housing 31, a dual-channel motor 32, a magnetic levitation piston movable shaft 33, an air chamber rubber sheet 34, and an air outlet 35. The dual-channel motor 32 is installed inside the housing 31. The magnetic levitation piston movable shaft 33 is mounted on the middle of the two electromagnetic coils on the dual-channel motor 32. The dual-channel motor 32 drives the magnetic levitation piston movable shaft 33 to perform reciprocating motion. A compressed air chamber 36 is provided at one end of the magnetic levitation piston movable shaft 33 inside the housing 31, and an inlet air chamber 37 and an outlet air chamber 38 are respectively connected to the two ends of the compressed air chamber 36. The outlet air chamber 38 is connected to the air outlet 35 through a connecting air pipe 39. The end of the compressed air chamber 36 facing the magnetic levitation piston movable shaft 33 has a movable opening, and the air chamber rubber sheet 34 is installed at the movable opening and facing the magnetic levitation piston movable shaft 33.

[0045] In this embodiment, when the dual-channel motor 32 is energized, the dual-channel motor 32 generates electromagnetic fields, causing the magnetic levitation piston movable shaft 33 to reciprocate. The direction of movement is horizontal left and right, i.e., the X-axis direction in the figure. During the movement, the magnetic levitation piston movable shaft 33 pushes the air chamber rubber sheet 34 to move or move away from the air chamber rubber sheet 34 to relax the air chamber rubber sheet 34, so that the compressed air chamber 36 can produce air intake or exhaust. When the magnetically levitated piston shaft 33 pushes the air chamber rubber sheet 34 to move, the air chamber rubber sheet 34 deforms to compress the space of the compressed air chamber 36. The compressed air chamber 36 outputs compressed air to the exhaust air chamber 38, which outputs air from the air outlet 35 through the connecting air pipe 39, thus achieving exhaust. When the magnetically levitated piston shaft 33 moves away from the air chamber rubber sheet 34 to relax it, the air chamber rubber sheet 34 returns to its original position, and the space of the compressed air chamber 36 returns to its original shape. Under pressure, the compressed air chamber 36 draws air from the intake air chamber 37 into its interior, thus achieving intake and storing air in the compressed air chamber for subsequent exhaust. During exhaust, the magnetically levitated piston air pump 3 delivers oxygen through the intake pipe 12 into the air passage 44 to facilitate air and oil supply.

[0046] See Figure 8 Preferably, the magnetic levitation piston air pump 3 further includes an inlet valve plate 30 and an outlet valve plate 300. An inlet air hole 370 is connected between the compressed air chamber 36 and the inlet air chamber 37. The inlet valve plate 30 is installed in the inlet air hole 370. An outlet air hole 380 is connected between the compressed air chamber 36 and the outlet air chamber 38. The outlet valve plate 300 is installed in the outlet air hole 380. When the inlet valve plate 30 is open, the outlet valve plate 300 is closed. When the inlet valve plate 30 is closed, the outlet valve plate 300 is open.

[0047] Specifically, the housing 31 is provided with an air inlet, through which outside air enters the housing 31. The air intake chamber 37 is also provided with an external air inlet 3000, through which air from inside the housing 31 enters the air intake chamber 37.

[0048] In this embodiment, when the magnetic levitation piston movable shaft 33 moves away from the air chamber rubber sheet 34 to relax the air chamber rubber sheet 34, the air chamber rubber sheet 34 relaxes and resets, the space of the compressed air chamber 36 returns to its original shape, the air intake valve 30 opens, and the compressed air chamber 36 is subjected to pressure to draw air from the air intake chamber 37 into the compressed air chamber 36, thus achieving air intake. The pressure inside the compressed air chamber 36 causes the air outlet valve 300 to close, and the air inside the housing 31 can enter the compressed air chamber 36 from the air intake valve 30 under the action of the internal pressure of the compressed air chamber 36. When the magnetic levitation piston movable shaft 33 pushes the air chamber rubber sheet 34 to move, the air chamber rubber sheet 34 deforms to compress the space of the compressed air chamber 36, the inlet valve 30 closes, and the outlet valve 300 opens, so that compressed air can smoothly enter the outlet air chamber 38 from the compressed air chamber 36 and be output from the air outlet 35 through the connecting air pipe 39.

[0049] See Figure 8 Preferably, there are two compressed air chambers 36, which are respectively located at both ends of the magnetic levitation piston movable shaft 33. Correspondingly, there are two air chamber rubber sheets 34, two air inlet chambers 37, two air outlet chambers 38, two connecting air pipes 39, two air inlet valve plates 30, and two air outlet valve plates 300. A total air outlet chamber 390 is provided inside the housing 31. Both connecting air pipes 39 are connected to the total air outlet chamber 390. An air outlet nozzle 35 is installed on the total air outlet chamber 390.

[0050] Specifically, each of the air outlet chamber 38 and the air inlet chamber 37 is equipped with an air outlet chamber cover and an air inlet chamber cover to ensure that the chamber is completely sealed except for the designated air inlet port 370, the air outlet port 380 and the air inlet port 3000 outside the chamber.

[0051] In this embodiment, when the dual-channel motor 32 is energized, the dual-channel motor 32 generates electromagnetic fields, causing the magnetic levitation piston movable shaft 33 to reciprocate. The direction of movement is horizontal left and right, i.e., the X-axis direction in the figure. During the movement, the magnetic levitation piston movable shaft 33 pushes the air chamber rubber sheet 34 to move or move away from the air chamber rubber sheet 34 to relax the air chamber rubber sheet 34, so that the compressed air chamber 36 can produce air intake or exhaust. When the magnetic levitation piston shaft 33 moves horizontally to the left, the left compressed air chamber 36 outputs compressed air to the left outlet chamber 38, and the right compressed air chamber 36 draws in air from the right inlet chamber 37. Conversely, when the magnetic levitation piston shaft 33 moves horizontally to the right, the right compressed air chamber 36 outputs compressed air to the right outlet chamber 38, and the left compressed air chamber 36 draws in air from the left inlet chamber 37. This process is repeated. The air output from the outlet chambers 38 on both sides converges into the main outlet chamber 390 through the two connecting air pipes 39. After merging, a stable air pressure and flow rate are maintained, and the air is output from the air outlet 35, thereby ensuring complete combustion of the flame.

[0052] See Figures 1-3 Preferably, the fuel heater further includes a housing 5, a support frame 51, a motor 52, a fan 53, and a mesh cover 54. The housing 5 is used to fit over the outside of the combustion cylinder 2, and the support frame 51 is used to support the housing 5 on the fuel tank 1. The motor 52 is used to drive the fan 53 to rotate. Both the motor 52 and the fan 53 are disposed inside the housing 5, and the fan 53 is disposed facing the air inlet 20 of the combustion cylinder 2. The mesh cover 54 is used to install on the end of the combustion cylinder 2 near the fan 53.

[0053] Specifically, the oil tank 1 is equipped with casters 56 on both sides and a pusher 57 at one end; the pusher 57 and the casters 56 enable the fuel heater to be moved according to actual needs.

[0054] In this embodiment, the outer shell 5 provides a mounting carrier for the various parts of the fuel heater and is fixed to the fuel tank 1 by the support frame 51 so as to move with the fuel tank 1; the motor 52 and the fan 53 are used to blow the heat emitted by the fuel combustion from the combustion cylinder 2 to achieve the effect of heating; the mesh cover 54 is provided to facilitate heat dissipation of the internal structure of the equipment and also to prevent foreign objects from entering the interior of the equipment.

[0055] See Figure 4Preferably, the fuel heater further includes an indirect combustion chamber structure 6, which includes a combustion chamber inner cylinder 61, a combustion chamber outer cylinder 62, a combustion chamber connecting pipe 63, and an exhaust pipe 64. The combustion chamber inner cylinder 61 is used to cover the outside of the combustion cylinder 2, and the combustion chamber outer cylinder 62 is used to cover the outside of the combustion chamber inner cylinder 61. The combustion chamber inner cylinder 61 and the combustion chamber outer cylinder 62 enclose a sealed exhaust space 65. The side wall of the combustion cylinder 2 is connected to the combustion chamber inner cylinder 61 through the combustion chamber connecting pipe 63, and the exhaust pipe 64 is connected to the combustion chamber outer cylinder 62.

[0056] Specifically, both ends of the combustion chamber inner cylinder 61 and the combustion chamber outer cylinder 62 are connected to sealing rings. The combustion chamber inner cylinder 61, the combustion chamber outer cylinder 62, and the sealing rings enclose a sealed exhaust space 65. The combustion chamber connecting pipe 63 is used to be installed at the end of the combustion cylinder 2 away from the air inlet 20. The combustion cylinder 2 is fixed to the outside of the combustion chamber inner cylinder 61 through the combustion chamber connecting pipe 63, and the combustion cylinder 2 is connected to the exhaust space 65. The exhaust pipe 64 is used to be installed at the end of the combustion chamber outer cylinder 62 away from the combustion chamber connecting pipe 63.

[0057] In this embodiment, the combustion chamber inner cylinder 61 and the combustion chamber outer cylinder 62 are designed to prevent the combustion cylinder 2 from being directly exposed to the outside, which could lead to burns. The combustion chamber connecting pipe 63 is used to fix the combustion chamber inner cylinder 61 to the outside of the combustion cylinder 2. After the combustion cylinder 2 generates warm air, it enters the exhaust space 65 through the combustion chamber connecting pipe 63, then enters the flue pipe 64 through the exhaust space 65, and is discharged from the flue pipe 64. The positioning of the combustion chamber connecting pipe 63 and the flue pipe 64 helps to increase the time that the warm air stays in the exhaust space 65, thereby playing a role in cooling down the air. This helps to ensure that the warm air is cooled to a suitable temperature before being discharged, avoiding the problem of burns caused by the high temperature at the flue pipe 64.

[0058] Specifically, a groove 68 is provided on the outer cylinder 62 of the combustion chamber, and a cleaning hole 690 is provided through the middle cylinder 61 of the combustion chamber, directly opposite the groove 68, and the cleaning hole 690 is covered by the cleaning cover 69.

[0059] In this embodiment, the cleaning hole 690 is provided to facilitate the cleaning of the exhaust space 65.

[0060] See Figure 4Preferably, the indirect combustion chamber structure 6 further includes a smoke exhaust sleeve 66, and a through hole 50 is provided through the upper side wall of the outer shell 5. The smoke exhaust pipe 64 is used to pass through the through hole 50, and the smoke exhaust sleeve 66 is provided on the upper outer wall of the outer shell 5 and covers the outside of the smoke exhaust pipe 64.

[0061] Specifically, the inner wall of the exhaust port sleeve 66 and the outer wall of the exhaust pipe 64 are spaced apart, with a distance ranging from 1cm to 3cm.

[0062] In this embodiment, the exhaust port sleeve 66 is disposed outside the exhaust pipe 64, which helps to further prevent burns caused by high temperature at the exhaust pipe 64.

[0063] See Figure 4 Preferably, the upper end of the exhaust port sleeve 66 is higher than the upper end of the exhaust pipe 64, and a plurality of diffuser holes 67 are evenly spaced on the circumferential sidewall of the exhaust port sleeve 66, the height of the diffuser holes 67 being the same as the upper end of the exhaust pipe 64.

[0064] In this embodiment, the height setting of the exhaust sleeve 66 and the setting of the diffuser hole 67 are conducive to making the heat diffuse more smoothly and evenly to the surrounding area.

[0065] See Figure 6 Preferably, the fuel heater further includes a direct combustion chamber structure 7, which includes a mask fixing plate 71 and a mask 72. The end of the combustion cylinder 2 away from the air inlet 20 is open. The mask fixing plate 71 is disposed inside the combustion cylinder 2 near the opening. The middle part of the mask fixing plate 71 is an exhaust port 73. The edge of the mask 72 has a connecting structure 74. The mask 72 is disposed at the exhaust port 73 through the connecting structure 74 and is spaced apart from the mask fixing plate 71.

[0066] Specifically, the mask fixing plate 71 has a circular structure and is used to be installed inside the combustion cylinder 2 near the opening. The inner ring of the mask fixing plate 71 is the exhaust port 73.

[0067] In this embodiment, the warm air generated inside the combustion cylinder 2 is emitted between the face shield 72 and the connecting structure 74. On the one hand, this structure helps to make the warm air emitted evenly from the circumferential direction of the combustion cylinder 2. On the other hand, the face shield 72 is set to provide a buffer for the warm air, avoiding the problem of scalding caused by the warm air being directly discharged from the exhaust port 73.

[0068] See Figure 6Preferably, the middle part of the mask 72 is convex, and the concave surface of the mask 72 is disposed facing the exhaust port 73.

[0069] Specifically, the face mask 72 can be a hollow conical structure or a spherical structure. Multiple connecting structures 74 are connected between the face mask 72 and the combustion cylinder 2, forming multiple exhaust ports between them for the discharge of heated air. The combustion cylinder 2 is covered by an auxiliary heat insulation cylinder 75, located inside the outer shell 5, to prevent burns caused by excessively high temperatures in the outer shell 5.

[0070] In this embodiment, the mask 72 serves to provide thermal radiation.

[0071] See Figure 4 Preferably, the fuel heater further includes an inlet filter pipe 55, which is installed inside the fuel tank 1 and connected to the inlet pipe 11.

[0072] In this embodiment, the oil inlet filter pipe 55 is designed to ensure that the fuel is free of impurities when it enters the connecting valve, thereby improving the combustion effect.

[0073] While the present invention has been disclosed above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the scope of protection of the present invention.

Claims

1. A fuel oil heater characterized by, The device includes an oil tank (1), a combustion chamber (2), a magnetic levitation piston pump (3), and an ignition structure (4). The ignition structure (4) includes a connecting pipe (41) and an oil nozzle (42). One end of the combustion chamber (2) has an air inlet (20). The connecting pipe (41) is installed on the combustion chamber (2) directly opposite the air inlet (20). The end of the connecting pipe (41) facing the combustion chamber (2) is an open structure. The oil nozzle (42) is installed at the open structure. An oil passage is provided in the middle of the connecting pipe (41). The connecting pipe (41) is provided with an air passage (44) located outside the oil passage (43); the end of the connecting pipe (41) away from the combustion cylinder (2) is sealed; the oil tank (1) is used to be connected to the connecting pipe (41) through the oil inlet pipe (11), and the oil inlet pipe (11) is connected to the oil passage (43); the magnetic levitation piston air pump (3) is used to be connected to the connecting pipe (41) through the air inlet pipe (12), and the air inlet pipe (12) is connected to the air passage (44); The fuel heater also includes a housing (5), a support frame (51), a motor (52), a fan (53), and a mesh cover (54). The housing (5) is used to cover the outside of the combustion cylinder (2), and the support frame (51) is used to support the housing (5) on the fuel tank (1). The motor (52) is used to drive the fan (53) to rotate. The motor (52) and the fan (53) are both located inside the housing (5). The fan (53) is positioned facing the air inlet (20) of the combustion cylinder (2). The mesh cover (54) is used to be installed on one end of the combustion cylinder (2) near the fan (53). The magnetic levitation piston air pump (3) is located below the outer casing (5) and above the oil tank (1); The magnetic levitation piston air pump (3) includes a housing (31), a dual-channel motor (32), a magnetic levitation piston movable shaft (33), an air chamber rubber sheet (34), and an air outlet (35). The dual-channel motor (32) is installed inside the housing (31). The magnetic levitation piston movable shaft (33) is installed on the middle part of the two electromagnetic coils of the dual-channel motor (32). The dual-channel motor (32) is used to drive the magnetic levitation piston movable shaft (33) to reciprocate in the horizontal direction. The housing (31) is provided with a compressed air chamber (36) at one end of the magnetic levitation piston moving shaft (33), and an air inlet chamber (37) and an air outlet chamber (38) respectively connected to the two ends of the compressed air chamber (36). The air outlet chamber (38) is used to connect to the air outlet nozzle (35) through a connecting air pipe (39). The compressed air chamber (36) has a movable port at one end facing the magnetic levitation piston moving shaft (33). The air chamber rubber sheet (34) is used to install at the movable port and is set towards the magnetic levitation piston moving shaft (33). The magnetic levitation piston air pump (3) includes a housing (31), a dual-channel motor (32), a magnetic levitation piston movable shaft (33), an air chamber rubber sheet (34), and an air outlet (35). The dual-channel motor (32) is installed inside the housing (31). The magnetic levitation piston movable shaft (33) is installed on the middle part of the two electromagnetic coils of the dual-channel motor (32). The dual-channel motor (32) is used to drive the magnetic levitation piston movable shaft (33) to perform reciprocating motion. The housing (31) is provided with a compressed air chamber (36) at one end of the magnetic levitation piston moving shaft (33), and an air inlet chamber (37) and an air outlet chamber (38) respectively connected to the two ends of the compressed air chamber (36). The air outlet chamber (38) is used to connect to the air outlet nozzle (35) through a connecting air pipe (39). The compressed air chamber (36) has a movable port at one end facing the magnetic levitation piston moving shaft (33). The air chamber rubber sheet (34) is used to install at the movable port and is set towards the magnetic levitation piston moving shaft (33). The magnetic levitation piston air pump (3) further includes an inlet valve plate (30) and an outlet valve plate (300). An inlet air hole (370) is connected between the compressed air chamber (36) and the inlet air chamber (37). The inlet valve plate (30) is installed in the inlet air hole (370). An outlet air hole (380) is connected between the compressed air chamber (36) and the outlet air chamber (38). The outlet valve plate (300) is installed in the outlet air hole (380). When the inlet valve plate (30) is open, the outlet valve plate (300) is closed. When the inlet valve plate (30) is closed, the outlet valve plate (300) is open. Two compressed air chambers (36) are provided, and the two compressed air chambers (36) are respectively provided at both ends of the magnetic levitation piston movable shaft (33). Correspondingly, two air chamber rubber sheets (34), two air inlet chambers (37), two air outlet chambers (38), two connecting air pipes (39), two air inlet valve plates (30) and two air outlet valve plates (300) are provided. The casing (31) is provided with a main air outlet chamber (390), and the two connecting air pipes (39) are connected to the main air outlet chamber (390). The main air outlet chamber (390) is equipped with an air outlet nozzle (35).

2. The fuel heater according to claim 1, wherein The ignition structure (4) also includes an oil pipe (45), which is installed inside the connecting pipe (41). The oil pipe (45) has an oil passage (43) inside, and the outer wall of the oil pipe (45) and the inner wall of the connecting pipe (41) enclose the gas passage (44).

3. The fuel oil heater according to claim 1, characterized in that, The ignition structure (4) further includes a flame stabilizer (46) and an ignition device (47). The flame stabilizer (46) is installed on the combustion cylinder (2) at a position directly opposite the air inlet (20). The connecting pipe (41) is installed in the middle of the flame stabilizer (46). The ignition device (47) is installed on the flame stabilizer (46), and the ignition head of the ignition device (47) is close to the fuel nozzle (42).

4. The fuel heater of claim 1, wherein It also includes an indirect combustion chamber structure (6), which includes a combustion chamber inner cylinder (61), an outer combustion chamber outer cylinder (62), a combustion chamber connecting pipe (63), and an exhaust pipe (64). The combustion chamber inner cylinder (61) is used to cover the outside of the combustion cylinder (2), and the outer combustion chamber outer cylinder (62) is used to cover the outside of the combustion chamber inner cylinder (61). The combustion chamber inner cylinder (61) and the outer combustion chamber outer cylinder (62) enclose a sealed heat dissipation and exhaust space (65). The side wall of the combustion cylinder (2) is connected to the combustion chamber inner cylinder (61) through the combustion chamber connecting pipe (63), and the exhaust pipe (64) is connected to the outer combustion chamber outer cylinder (62).

5. The fuel heater of claim 4, wherein The indirect combustion chamber structure (6) also includes a smoke outlet sleeve (66), and a perforation (50) is provided through the upper side wall of the outer shell (5). The smoke outlet pipe (64) is used to pass through the perforation (50). The smoke outlet sleeve (66) is provided on the upper outer wall of the outer shell (5) and covers the outside of the smoke outlet pipe (64). The upper end of the exhaust port sleeve (66) is higher than the upper end of the exhaust pipe (64). The circumferential sidewall of the exhaust port sleeve (66) is provided with a plurality of diffuser holes (67) at even intervals. The height of the diffuser holes (67) is the same as the upper end of the exhaust pipe (64).

6. The fuel heater of claim 1, wherein It also includes a direct combustion chamber structure (7), which includes a mask fixing plate (71) and a mask (72). The end of the combustion cylinder (2) away from the air inlet (20) is open. The mask fixing plate (71) is used to be set inside the combustion cylinder (2) near the opening. The middle part of the mask fixing plate (71) is an exhaust port (73). The edge of the mask (72) has a connecting structure (74). The mask (72) is set at the exhaust port (73) through the connecting structure (74) and is set at a distance from the mask fixing plate (71). The mask (72) has a raised center and the concave surface of the mask (72) is oriented toward the exhaust port (73).

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