MOBILE HEATER

Abstract

 The application, which relates to the technical field of air heater, provides a mobile air heater including a material tank, on the top of which a control base is mounted. A heating tube, in which a motor, a burner, a water pipe assembly and a flame baffle are arranged, is mounted on the control base. The motor is used to form air flow passing through the heating tube. The burner and the water pipe assembly are used to supply heat, respectively, in an oil mode and a water mode, forming warm air cooperating with the air flow. The flame baffle is used to prevent the flame generated by the burner directly roasting the water pipe assembly and realize the switchover between the oil mode and the water mode. The mobile air heater has at least the following advantages: fuel oil consumption and combustion exhaust gas are reduced, when fuel oil needs to be added, there is no need to stop working while waiting for the oil tank to cool down, and the mobile air heater has a large output power.

Description

[0001] This application claims priority to Chinese Patent Application No.CN 202311474272.0, filed on November 8, 2023. The disclosures of the aforementioned application are hereby incorporated herein by reference in its entirety.

TECHNICAL FIELD

[0002] The application relates to an air heater, and particularly relates to a mobile and high-power air heater which has two heat supplying modes including a water mode and an oil mode.

BACKGROUND

[0003] A main purpose of using an oil air heater is to achieve heating in industrial or commercial places, and it can also be used to dry some products or meet process requirements. The oil air heater uses fuel to heat air. Among various heating manners, air heating is more comfortable, and a common way to achieve air heating is to use an air heater.

[0004] However, there are some problems with the oil air heaters in the prior art. For example, when a heater is running, the fuel is not easy to burn sufficiently. The combustion exhaust gas with insufficient combustion contains a large amount of toxic and harmful substances such as CO₂, CO, sulfide, NO_x, etc., where CO is more toxic. In addition, when adding fuel to the material tank of an oil air heater, it is necessary to wait for the material tank to cool down completely. However, the natural cooling of the material tank takes a long time, resulting in that the oil air heater often stopping for a long time while waiting for fuel to be added.

TECHNICAL PROBLEMS

[0005] The present application provides a mobile air heater to solve the technical problems of the air heaters in the prior art that the combustion exhaust gas is harmful and the time for adding fuel to stop is long.

TECHNICAL SOLUTIONS

[0006] In order to achieve the above purpose, the present application provides a mobile air heater which includes a material tank. A first end of the bottom of the material tank is provided with one or more wheels which are rotatable. A second end of the bottom of the material tank is provided with one or more supports which are fixed. A side wall of the material tank is provided with a hand rack which is fixed. The top of the material tank is provided with a control base which is fixed. A heating tube is fixedly mounted on the control base and is provided with an air passage in it. A first end of the air passage is provided with an air inlet. A motor is fixedly arranged close to the end provided with the air inlet, i.e., the first end of the air passage. Two or more fan blades are fixedly mounted on the output shaft of the motor. A second end of the air passage is provided with an air outlet. A burner fueled by oil is mounted in the air passage. A combustion chamber is arranged on a first side of the burner. A flame baffle is mounted in the combustion chamber and is rotatable. The flame baffle is used for blocking the flame generated by the burner and changing, by the rotation of the flame baffle, the flow path of air in the air passage. The mobile air heater provided in the present application further includes a water pipe assembly.

[0007] The water pipe assembly is mounted in the air passage and is close to the end provided with the air outlet, i.e., the second end of the air passage. The water pipe assembly is used for supplying, by water cycling, heat output by the mobile air heater. The water pipe assembly includes two brackets, where each bracket is an annular structure. The outer wall of each bracket is fixedly connected to the inner wall of the heating tube. A heat exchange pipe is fixedly mounted between the two brackets. The input end of the heat exchange pipe is provided with an electric heater, and the output end of the heat exchange pipe is provided with a water pump. The mobile air heater has two working modes including a water mode and an oil mode. When the mobile air heater works in the water mode, the flame baffle is parallel to the axis of the air passage, such that air flow is not blocked by the flame baffle and the contact efficiency between air flow and the heat exchange pipe is increased to improve the heat exchange efficiency of the heat exchange pipe. When the mobile air heater works in the oil mode, the flame baffle is perpendicular to the axis of the air passage, such that the flame generated by the burner is blocked by the flame baffle that is between the burner and the heat exchange pipe to avoid the flame generated by the burner from directly roasting the heat exchange pipe.

[0008] In a possible embodiment, the material tank includes a water tank and an oil tank, between which a separator is arranged to separate the water tank from the oil tank. The oil tank is arranged above the water tank. One or more heat transfer fins, which are in communication with the water tank, are arranged in the oil tank.

[0009] In a possible embodiment, the heat exchange pipe is a spiral structure. The spiral radius of the heat exchange pipe gradually increases along the direction from the end provided with the air inlet, i.e., the first end of the air passage to the end provided with the air outlet, i.e., the second end of the air passage. A first/input end of the heat exchange pipe is provided with a first water inlet pipe which is fixed, and a second/output end of the heat exchange pipe is provided with a first water outlet pipe which is fixed.

[0010] In a possible embodiment, the water pump is fixedly mounted on the top of the material tank. The input end of the water pump is in communication with the first water outlet pipe, and the output end of the water pump is fixedly connected to a second water outlet pipe which is in communication with the water tank.

[0011] The electric heater is fixedly mounted on the top of the material tank. The input end of the electric heater is fixedly connected to a first end of a second water inlet pipe, a second end of which is in communication with the water tank. The output end of the electric heater is in communication with the first water inlet pipe.

[0012] In a possible embodiment, an oil pump is fixedly mounted on the top of the material tank. The input end of the oil pump is connected to a first end of an oil pipe, a second end of which is in communication with the oil tank. The output end of the oil pump is connected to a fuel pipe which is used for delivering fuel to the burner.

[0013] In a possible embodiment, the burner includes a support ring and a shell which is fixedly mounted, through a support rod, on the inner wall of the support ring. The support ring is fixedly mounted on the inner wall of the heating tube. A nozzle and a spark plug for igniting the nozzle are mounted in the shell. A first end of the fuel pipe is in communication with the nozzle.

[0014] In a possible embodiment, a micromotor is fixedly mounted on the outer wall of the heating tube. A rotating rod is coaxially connected to the output shaft of the micromotor. The rotating rod penetrates through the shell of the heating tube and a first end of the rotating rod is fixedly connected to a side wall of the flame baffle.

[0015] In a possible embodiment, the flame baffle is between the burner and the water pipe assembly, and the flame baffle is rotatable in a range of zero degree to 360 degrees. When the flame baffle is rotated to a state parallel to the axis of the air passage, the flame baffle is used for increasing the contact efficiency between the water pipe assembly and air flow. When the flame baffle is rotated to a state perpendicular to the axis of the air passage, the flame baffle is used for blocking the flame generated by the burner.

ADVANTAGEOUS EFFECTS OF THE DISCLOSURE

[0016] Compared with the prior art, the air heater provided in the present application has at least the following three aspects of advantageous effects.

• 1. The mobile air heater provided in the present application has two work modes of the water mode and the oil mode. Either of the two working modes can operate alone, where the output power of the water mode is lower and the water mode can supply warm air with lower temperature, and the output power of the oil mode is higher and the oil mode can supply warm air with higher temperature. When the heat provided by the air heater needs to be reduced, the air heater can be switched from the oil mode to the water mode. The water mode uses electricity to provide heat, which reduces fuel oil consumption, thereby reducing the quantity of harmful gases produced by insufficient combustion of the fuel oil. In addition, when it is necessary to add fuel oil and wait for the oil tank to cool down, the mobile air heater can work in the water mode, so that there is no need to stop the heater and it can continuously output warm air. Furthermore, the two working modes of water heating and oil heating can operate and output heating power simultaneously. Compared with the air heaters with single working mode, the maximum heating power of the mobile air heater provided in the present application is higher. That is, the mobile air heater provided in the present application is a high-power air heater.
• 2. In order to realize the switching of the two working modes of water heating and oil heating, a flame baffle is used in the present application. When the mobile air heater works in the water mode, the flame baffle is parallel to the axis of the air passage, such that the air passage is unblocked and the air flow can be fully contact with the heat exchange pipe to improve the heat exchange efficiency. When the mobile air heater works in the oil mode, the flame baffle is perpendicular to the axis of the air passage to block the flame generated by the burner, prevent the flame from directly roasting the heat exchange pipe, and prolong the service life of the heat exchange pipe.
• 3. By rotating the flame baffle and adjusting the angle between the flame baffle and the axis of the air passage, the extent of the flame baffle blocking the air passage can be continuously adjusted, such that the volume of air output by the mobile air heater can be adjusted. When the flame baffle is parallel to the axis of the air passage, the extent of the flame baffle blocking the air passage is smallest, and the volume of air output by the mobile air heater is largest. When the flame baffle is perpendicular to the axis of the air passage, the extent of the flame baffle blocking the air passage is largest, and the volume of air output by the mobile air heater is smallest.

BRIEF DESCRIPTION OF THE DRAWINGS

[0017] 

Figure 1 is a first schematic perspective view of a mobile air heater according to the embodiments of the present application;

Figure 2 is a second schematic perspective view of a mobile air heater according to the embodiments of the present application;

Figure 3 is a third schematic perspective view of a mobile air heater according to the embodiments of the present application, where the mobile air heater is semi-sectioned to show the structures therein;

Figure 4 schematically shows a flame baffle mounted in a heating tube of a mobile air heater according to the embodiments of the present application, where the heating tube is semi-sectioned to show the structures therein;

Figure 5 schematically shows a heating tube of a mobile air heater according to the embodiments of the present application and the structures in the heating tube, where the heating tube, a shell of a burner and a support ring of the burner are all semi-sectioned;

Figure 6 schematically shows a material tank of a mobile air heater according to the embodiments of the present application and the structures attached on the material tank;

Figure 7 schematically shows a water pipe assembly of a mobile air heater according to the embodiments of the present application;

Figure 8 is a schematic plan view of a mobile air heater according to the embodiments of the present application, where the mobile air heater is semi-sectioned to show the structures therein;

Figure 9 schematically shows a first rotation angle of a flame baffle of a mobile air heater according to the embodiments of the present application, where the flame baffle is parallel to the axis of an air passage;

Figure 10 schematically shows a second rotation angle of a flame baffle of a mobile air heater according to the embodiments of the present application, where the flame baffle is perpendicular to the axis of an air passage; and

Figure 11 is an enlarged view of part A according to Figure 8.

[0018] In the drawings:

1-material tank;

101-water tank; 1011-heat transfer fin; 1011a-first opening; 1011b-second opening; 102-oil tank;

1021-separator;

103-oil pump; 1031-oil pipe; 1032-fuel pipe;

104-electric heater; 1041-second water inlet pipe; 1042-second water outlet pipe;

105-water pump;

2-control base;

3-heating tube;

301-combustion chamber; 3011-air inlet; 3012-air outlet;

302-flame baffle; 303-micromotor; 3031-rotating rod;

401-wheel; 402-support; 403-hand rack;

5-burner; 501-support ring; 502-shell; 5021-nozzle;

6-motor; 601-fan blade;

7-water pipe assembly; 701-bracket; 702-heat exchange pipe; 7021-first water inlet pipe; 7022-first water outlet pipe.

DETAILED DESCRIPTION OF ILLUSTRATIVE EMBODIMENTS

[0019] Technical solutions of embodiments of the present application will be clearly and completely described below in conjunction with the drawings of the present application. Obviously, the embodiments described are only part of embodiments of the present application and not all of them. Based on the embodiments described below, all other embodiments obtained by a person skilled in the art without creative work are within the protection scope of the present application.

[0020] It should be noted that, in the following description, the terms indicating direction or position relationship, such as "up", "down", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like, are based on the direction or position relationship shown in the drawings. These terms are used in order to simplify the description so that the embodiments of the present application can be clearly described. These terms do not indicate or imply that the relevant technical features must have a particular direction or position relationship, or be constructed or operated in a particular direction or position. These terms do not constitute any unreasonable limitation to the present application. In addition, the term "multiple", unless otherwise specified, refers to a number of two or more.

[0021] Referring to Figures 1 to 5, the mobile air heater provided in this application may include a material tank 1. One or more wheels 401 are rotatably mounted at a first end of the bottom of the material tank 1. One or more supports 402 are fixedly mounted at a second end of the bottom of the material tank 1. A hand rack 403 is fixedly mounted on a side wall of the material tank 1. A control base 2 is fixedly mounted at the top of the material tank 1. A heating tube 3 is fixedly mounted on the control base 2, where the heating tube 3 is provided with an air passage in it. A first end of the air passage is provided with an air inlet 3011. A motor 6 is fixedly mounted close to the end provided with the air inlet 3011, i.e., the first end of the air passage. Multiple fan blades 601 are fixedly mounted on the output shaft of the motor 6. A second end of the air passage is provided with an air outlet 3012. A burner 5 fueled by oil is mounted in the air passage. Optionally, the burner 5 includes at least a support ring 501 and a shell 502. The shell 502 is fixedly mounted on the inner wall of the support ring 501 through a support rod. The support ring 501 is fixedly mounted on the inner wall of the heating tube 3. A gap is formed between the support ring 501 and the shell 502 for air flow passing through. A nozzle 5021 and a spark plug for igniting the nozzle 5021 are mounted in the shell 502, where the nozzle 5021 is in communication with a first end of a fuel pipe 1032.

[0022] A combustion chamber 301 is arranged on a first side of the burner 5. A flame baffle 302 for blocking flame is mounted in the combustion chamber 301. Optionally, the flame baffle 302 is a disc-shaped structure. The outer diameter of the flame baffle 302 is less than the inner diameter of the air passage (i.e., the inner diameter of the heating tube 3). Therefore, even though the flame baffle 302 is rotated to a state perpendicular to the air passage, the air passage is not completely blocked by the flame baffle 302, because there is a gap between the outer edge of the flame baffle 302 and the inner wall of the air passage (i.e., the inner wall of the heating tube 3) for air flow to pass through. By adjusting the angle of the flame baffle 302, the flow path of the air in the air passage can be changed. In order to rotate the flame baffle 302 to adjust its angle, a micromotor 303 may be fixedly mounted on the outer wall of the heating tube 3. A rotating rod 3031 is coaxially connected to the output shaft of the micromotor 303. The rotating rod 3031 penetrates through a shell of the heating tube 3 and a first end of the rotating rod 3031 is fixedly connected to a side wall of the flame baffle 302. When the angle of the flame baffle 302 needs to be adjusted, the micromotor 303 drives the rotating rod 3031 to rotate, thus the flame baffle 302 rotates with the rotating rod 3031 and the angle between the flame baffle 302 and the axis of the air passage (i.e., a straight line or a curve extending along the extension direction of the air passage) is changed. Specifically, the "micromotor" may refer to a motor with an output power not more than 500W.

[0023] When the angle of the flame baffle 302 (i.e., the angle between the flame baffle 302 and the axis of the air passage) is changed, the flow path of the air in the air passage is changed. When the flame baffle 302 is perpendicular to the axis of the air passage, the angle of the flame baffle 302 is 90 degrees. When the flame baffle 302 is parallel (when the axis is a straight line) or tangent (when the axis is a curve) to the axis of the air passage, the angle of the flame baffle 302 is zero degree. When the angle of the flame baffle 302 changes from 90 degrees to zero degree, the blocking effect of the flame baffle 302 on the air flow gradually weakens. When the angle of the flame baffle 302 is zero degree, the air flow blows directly to the heat exchange pipe 702 almost unobstructed. In this situation, the heat exchange effect between the heat exchange pipe 702 and the air flow is better, so that the heating effect of the air heater can be improved when the air heater works in a water mode.

[0024] When the heat provided by the air heater needs to be reduced, in order to avoid discharging combustion exhaust gas containing a large number of harmful gases due to the fuel being not fully combusted, the air heater provided in the present application can be switched to the water mode to work/supply heat. As shown in Figures 5 and 6, a water pipe assembly 7 is mounted in the air passage and is close to the end provided with the air outlet 3012, i.e., the second end of the air passage. The input end of the water pipe assembly 7 is provided with an electric heater 104, and the output end of the water pipe assembly 7 is provided with a water pump 105. The water pipe assembly 7 is used for supplying the air heater with heat output by the air heater through water cycling.

[0025] Optionally, as shown in Figures 6 and 7, a first water inlet pipe 7021 is fixedly mounted at a first end of the heat exchange pipe 702, and a first water outlet pipe 7022 is fixedly mounted at a second end of the heat exchange pipe 702. The water pump 105 is fixedly mounted on the top of the material tank 1. The input end of the water pump 105 is communicated with the first water outlet pipe 7022, and the output end of the water pump 105 is fixedly connected to a second water outlet pipe 1042 which is communicated with the water tank 101. Under the drive of the water pump 105, the water in the water tank 101 can successively flow through the first water inlet pipe 7021, the heat exchange pipe 702, the first water outlet pipe 7022, the water pump 105, and the second water outlet pipe 1042, then flow back into the water tank 101 from the second water outlet pipe 1042, forming a water cycle.

[0026] Optionally, as shown in Figure 6, the electric heater 104 may be fixedly mounted at the top of the material tank 1. The input end of the electric heater 104 is fixedly connected to a second water inlet pipe 1041. A first end of the second water inlet pipe 1041 is connected to the input end of the electric heater 104, and a second end of the second water inlet pipe 1041 is communicated with the water tank 101. The output end of the electric heater 104 is communicated with the first water inlet pipe 7021. After the water pump 105 is started, the water in the water tank 101 can be pumped into the heat exchange pipe 702, meanwhile the water can be heated through the electric heater 104. The heated water flows through the heat exchange pipe 702, meanwhile fan blades 601 blow air toward the air outlet 3012 to form air flow which takes away the heat in the heat exchange pipe 702 and blows out from the air outlet 3012, forming warm air and realizing the heat output of the air heater.

[0027] Optionally, as shown in Figure 7, the water pipe assembly 7 at least includes two brackets 701 which are used for fixing the two ends of the heat exchange pipe 702. The heat exchange pipe 702 is fixedly mounted between the two brackets 701. Each bracket 701 may be an annular structure. The outer wall of each bracket 701 is fixedly connected to the inner wall of the air passage.

[0028] In order to reduce the air resistance of the air passage and improve the heat exchange efficiency of the heat exchange pipe 702, optionally, as shown in Figures 5 and 7, the heat exchange pipe 702 is in a spiral structure, and the spiral radius of the heat exchange pipe 702 gradually increases along the direction from the end provided with the air inlet 3011 to the end provided with the air outlet 3012. The first end of the heat exchange pipe 702 is connected to the first water inlet pipe 7021, and the second end of the heat exchange pipe 702 is connected to the first water outlet pipe 7022.

[0029] For an oil air heater in the prior art, when it is short of oil, in order to add oil, it is necessary to wait for the oil tank of the oil air heater to fully cool down. However, the natural cooling of the oil tank takes a long time, resulting in that the oil air heater often stopping for a long time which affects the normal heating/use of users. The air heater provided in the present application is provided with a loop for water cycling which can assist the oil tank 102 to cool. When the loop for water cycling works, air flow takes away the heat in the water pipe assembly 7, forming cold water with low temperature. The cooled low-temperature cold water flows into the water tank 101 through the second water outlet pipe 1042. The water tank 101 is arranged adjacent to the oil tank 102, such that the low-temperature cold water in the water tank 101 can cool down the oil tank 102 quickly to a low temperature through heat transfer. Optionally, one or more heat transfer fins 1011 are mounted in the oil tank 102, and these heat transfer fins 1011 are all communicated with the water tank 101. The cold water in the water tank 101 is indirectly in contact with the oil in the oil tank 102 through the heat transfer fins 1011. The heat transfer fins 1011 can increase the contact area of the cold water and the oil, thus improving the cooling effect on the oil. Optionally, each heat transfer fin 1011 may be a hollow structure to be communicated with the water tank 101. As shown in Figure 11, the heat transfer fins 1011 may be fixed on a separator 1021 between the oil tank 102 and the water tank 101, extend upward and enter into the oil tank 102. The lower end of each heat transfer fin 1011 is provided with a first opening 1011a and a second opening 1011b which are as a water inlet and a water outlet respectively. The cold water in the water tank 101 can enter and flow out of each heat transfer fin 1011 through the two openings respectively. The high-temperature oil in the oil tank 102 contacts the outer surface of each heat transfer fin 1011, thus heat transfers to the transfer fins 1011. The cold water in the water tank 101 enters the inside of each heat transfer fin 1011 to take away the heat of the heat transfer fin 1011. The heat is transferred from the high-temperature oil to the low-temperature cold water, such that the cooling of the oil tank 102 is realized.

[0030] In order to make the mobile air heater have two working modes of water mode and oil mode simultaneously, optionally, as shown in Figures 3 and 8, the material tank 1 may be set to a mixed type of water tank 101 and oil tank 102, that is, the material tank 1 includes the water tank 101 and the oil tank 102. The separator 1021 is arranged between the water tank 101 and the oil tank 102, and the separator 1021 is used for separating the water tank 101 from the oil tank 102. The oil tank 102 may be arranged above the water tank 101.

[0031] In order to supply fuel/oil to the burner 5, optionally, as shown in Figures 6 and 8, an oil pump 103 may be fixedly mounted on the top of the material tank 1. An oil pipe 1031 is mounted at the input end of the oil pump 103. A first end of the oil pipe 1031 is connected to the input end of the oil pump 103, and a second end of the oil pipe 1031 is communicated with the oil tank 102. The output end of the oil pump 103 is provided with a fuel pipe 1032 which is used for delivering fuel to the burner 5.

[0032] The flame baffle 302 is between the burner 5 and the water pipe assembly 7. Optionally, the flame baffle 302 may be rotated in the range of zero degree to 360 degrees. That is, when the normal straight line of the flame baffle 302 and the axis of the air passage are treated as two vectors with directions, respectively, the angle between the two vectors can be changed in the range from zero degree to 360 degrees.

[0033] When the mobile air heater is switched to the water mode to work, as shown in Figure 9, the flame baffle 302 is rotated to the state parallel to the axis of the air passage. In this situation, the flame baffle 302 hardly blocks the air flow blown out by the rotating fan blades 601, and the air flow can blow straight to the water pipe assembly 7, thus increasing the contact efficiency between the water pipe assembly 7 and the air flow and improving the heat exchange efficiency of the heat exchange pipe 702.

[0034] When the mobile air heater is switched to the oil mode to work, as shown in Figure 10, the flame baffle 302 is rotated to the state perpendicular to the axis of the air passage. In this situation, the flame baffle 302, which is between the burner 5 and the heat exchange pipe 702, blocks the flame generated by the burner 5 to avoid the flame from directly roasting the heat exchange pipe 702.

[0035] The working process of the mobile air heater provided in the present application is described as follows. When the air heater works/supplies heat in the oil mode alone, the oil pump 103 is started to drive the oil in the oil tank 102 to move into the nozzle 5021 through the fuel pipe 1032, then the oil is sprayed out by the nozzle 5021. At the same time, ignition is carried out by the spark plug to ignite the oil sprayed out by the nozzle 5021 to make the oil burning, and the fan blades 601 rotate driven by the motor 6 to drive air to flow, through the air inlet 3011, into the air passage. In this situation, the heat generated by oil combustion flows with air toward the air outlet 3012, then flows out of the air passage from the air outlet 3012, forming warm air and realizing the heat output of the air heater. When the air heater supplies heat in the oil mode alone, the flame baffle 302 is perpendicular to the axis of the air passage to form an obstacle in front of the nozzle 5021. This can not only block the flame generated by oil combustion from directly roasting the heat exchange pipe, but also prevent the flame from spraying out from the air outlet 3021, so as to ensure the safety of using the air heater.

[0036] When the air heater works/supplies heat in the water mode alone, the oil pump 103 is turned off to stop supplying heat using oil. The water pump 105 is started to drive the water in the water tank 101 to move into the electric heater 104 which is turned on to heat water. The heated water flows, driven by the water pump 105, into the water pipe assembly 7. At the same time, the motor 6 drives the fan blades 601 to rotate to drive air to flow, passing through the air inlet 3011, into the air passage to form air flow. The air flow is heated when passing through the heat exchange pipe 702, then flows out from the air outlet 3012, forming warming air and realizing the heat output of the air heater. When the air heater works/supplies heat in the water mode alone, the micromotor 303 can drive the flame baffle 302 to rotate through the rotating rod 3031, such that the flame baffle 302 can be rotated to the state parallel to the axis of the air passage and can hardly blocks the air flowing toward the air outlet 3012.

[0037] When the air heater supplies heat in the oil mode and the fuel oil is low, the water mode can be started before the oil mode is stopped. Adding fuel oil can be performed after waiting for the oil tank 102 to cool down, meanwhile the air heater keeps working and the supply of warm air will not be interrupted. In addition, the air heater is switched to the water mode, and low-temperature cold water, which is formed by passing through the heat exchange pipe 702 and enters the water tank 101 from the second water outlet pipe 1042, produces a cooling effect on the oil tank 102 adjacent to the water tank 101, therefore, the oil tank 102 is rapidly cooled down so that the fuel oil can be added as soon as possible. In particular, the heat transfer fins 1011 may be arranged in the oil tank 102, and the transfer fins 1011 are communicated with the water tank 101, such that the heat dissipation area of high temperature fuel oil can be increased, the heat dissipation efficiency is further improved, and the cooling time of the oil tank 102 is further reduced.

Claims

1. A mobile air heater, comprising a material tank (1), wherein one or more wheels (401) are rotatably mounted at a first end of a bottom of the material tank (1), one or more supports (402) are fixedly mounted at a second end of the bottom of the material tank (1), a hand rack (403) is fixedly mounted on a side wall of the material tank (1), a control base (2) is fixedly mounted on a top of the material tank (1), a heating tube (3) is fixedly mounted on the control base (2), the heating tube (3) is provided with an air passage therein, a first end of the air passage is provided with an air inlet (3011), a motor (6) is fixedly mounted in the air passage and is close to the first end of the air passage, two or more fan blades (601) are fixedly mounted on a output shaft of the motor (6), a second end of the air passage is provided with an air outlet (3012), and
the mobile air heater is characterized by:

a burner (5) fueled by oil is mounted in the air passage, a combustion chamber (301) is arranged on a first side of the burner (5), a flame baffle (302) is rotatably mounted in the combustion chamber (301), the flame baffle (302) is used for blocking flame generated by the burner (5) and changing, by rotating the flame baffle (302), a flow path of air in the air passage;

the mobile air heater further comprises a water pipe assembly (7), the water pipe assembly (7) is mounted in the air passage and is close to the second end of the air passage, the water pipe assembly (7) is used for supplying, by water cycling, heat output by the mobile air heater, the water pipe assembly (7) comprises two brackets (701) with each bracket (701) being an annular structure, an outer wall of each bracket (701) is fixedly connected to an inner wall of the heating tube (3), a heat exchange pipe (702) is fixedly mounted between the two brackets (701), an electric heater (104) is mounted at an input end of the heat exchange pipe (702), and a water pump (105) is mounted at an output end of the heat exchange pipe (702);

wherein:

the mobile air heater has two working modes comprising a water mode and an oil mode;

when the mobile air heater works in the water mode, the flame baffle (302) is parallel to an axis of the air passage, such that an air flow in the air passage is not blocked by the flame baffle (302) and a contact efficiency between the air flow and the heat exchange pipe (702) is increased to improve a heat exchange efficiency of the heat exchange pipe (702); and

when the mobile air heater works in the oil mode, the flame baffle (302) is perpendicular to the axis of the air passage, such that the flame generated by the burner (5) is blocked by the flame baffle (302) that is between the burner (5) and the heat exchange pipe (702) to avoid the flame generated by the burner (5) from directly roasting the heat exchange pipe (702).

2. The mobile air heater of claim 1, characterized by:
the material tank (1) comprises a water tank (101) and an oil tank (102), a separator (1021) is arranged between the water tank (101) and the oil tank (102) to separate the water tank (101) from the oil tank (102), the oil tank (102) is above the water tank (101), and one or more heat transfer fins (1011) are arranged in the oil tank (102) and are in communication with the water tank (101).

3. The mobile air heater of claim 2, characterized by:
the heat exchange pipe (702) is spiral, a spiral radius of the heat exchange pipe (702) gradually increases along a direction from the first end of the air passage to the second end of the air passage, a first water inlet pipe (7021) is fixedly connected to the input end of the heat exchange pipe (702), and a first water outlet pipe (7022) is fixedly connected to the output end of the heat exchange pipe (702).

4. The mobile air heater of claim 3, characterized by:

the water pump (105) is fixedly mounted on the top of the material tank (1), an input end of the water pump (105) is in communication with the first water outlet pipe (7022), a second water outlet pipe (1042) is fixedly connected to an output end of the water pump (105), the second water outlet pipe (1042) is in communication with the water tank (101);

the electric heater (104) is fixedly mounted on the top of the material tank (1), a first end of a second water inlet pipe (1041) is fixedly connected to an input end of the electric heater (104), a second end of the second water inlet pipe (1041) is in communication with the water tank (101), and an output end of the electric heater (104) is in communication with the first water inlet pipe (7021).

5. The mobile air heater of claim 1, characterized by:
an oil pump (103) is fixedly mounted on the top of the material tank (1), a first end of an oil pipe (1031) is connected to an input end of the oil pump (103), a second end of the oil pipe (1031) is in communication with the oil tank (102), a fuel pipe (1032) is connected to an output end of the oil pump (103), and the fuel pipe (1032) is used for delivering fuel to the burner (5).

6. The mobile air heater of claim 5, characterized by:
the burner (5) comprises a support ring (501) and a shell (502), the shell (502) is fixedly mounted, through a support rod, on an inner wall of the support ring (501), the support ring (501) is fixedly mounted on the inner wall of the heating tube (3), a nozzle (5021) and a spark plug for igniting the nozzle (5021) are mounted in the shell (502), and a first end of the fuel pipe (1032) is in communication with the nozzle (5021).

7. The mobile air heater of claim 1, characterized by:
a micromotor (303) is fixedly mounted on an outer wall of the heating tube (3), a rotating rod (3031) is coaxially connected to an output shaft of the micromotor (303), the rotating rod (3031) penetrates through a shell of the heating tube (3) and a first end of the rotating rod (3031) is fixedly connected to a side wall of the flame baffle (302).

8. The mobile air heater of claim 1, characterized by:
the flame baffle (302) is between the burner (5) and the water pipe assembly (7), and the flame baffle (302) is rotatable in a range of zero degree to 360 degrees.

Drawing