Mobile heater

Abstract

A mobile heater, comprising a storage box (1). A control base (2) is installed at the top of the storage box (1). A warm air duct (3) is installed on the control base (2). A motor (6), a combustor (5), a water supply pipe (7) and a flame blocking plate (302) are arranged in the warm air duct (3). The motor (6) is used for generating airflow passing through the warm air duct (3). The combustor (5) and the water supply pipe (7) respectively generate heat using a fuel mode and a water heating mode, and form warm air in cooperation with the airflow; the flame blocking plate (302) is used for blocking the flame of the combustor (5) from directly heating the water supply pipe (7). Thus, the switching between the fuel mode and the water heating mode is achieved.

Description

A mobile air heater

[0001] This patent application claims priority to Chinese patent application No. CN 202311474272.0 filed on November 8, 2023. The disclosure of the prior application is incorporated herein by reference in its entirety. Technical Field

[0002] The present application relates to a heater, specifically, to a portable, high-power heater with two heating modes: water heating and oil heating. Background Art

[0003] Fuel-fired fan heaters are primarily used for heating industrial or commercial spaces. They can also be used to dry products or meet process requirements. Fuel-fired fan heaters heat the air using fuel. Among various heating methods, air heating is the most comfortable, and using a fan heater is a common method for achieving this.

[0004] However, there are some problems with existing fuel heaters. For example, when the heater is running, the fuel is not easy to burn completely; the exhaust gas from incomplete combustion will contain a large amount of CO2, CO, sulfide, NO x In addition, when adding fuel to the fuel tank of the fuel heater, you need to wait for the tank to completely cool down. The natural cooling time of the fuel tank is long, which causes the fuel heater to stop running for a long time while waiting for the fuel to be added. Technical issues

[0005] The purpose of the present invention is to provide a mobile air heater to solve the technical problems of existing air heaters, such as the serious harm caused by combustion exhaust gas and the long waiting time for refueling. Technical Solutions

[0006] The top of the fuel tank is equipped with a fuel filter, and the fuel filter is installed in the fuel filter housing, and the fuel filter is installed in the fuel filter housing, and the fuel filter is installed in the fuel filter housing, and the fuel filter is installed in the fuel filter housing, and the fuel filter is installed in the fuel filter housing, and the fuel filter is installed in the fuel filter housing, and the fuel filter is installed in the fuel filter housing, and the fuel filter is installed in the fuel filter housing, and the fuel filter is installed in the fuel filter housing, and the fuel filter is installed in the fuel filter housing, and the fuel filter is installed in the fuel filter housing,

[0007] The water supply pipeline is installed within the air passage near one end of the air outlet. It is used to provide heat output by the mobile air heater through water circulation. The water supply pipeline includes two support frames, each of which is annular in structure. The outer walls of the support frames are fixedly connected to the inner wall of the heating pipe. A heat exchange tube is fixedly installed between the two support frames. An electric heater is installed at the input end of the heat exchange tube, and a water pump is installed at the output end of the heat exchange tube. The mobile air heater has two operating modes: water heating and oil heating. When the mobile air heater operates in water heating mode, the flame shield is parallel to the axis of the air passage and does not block airflow, thereby increasing the contact efficiency between the airflow and the heat exchange tube, thereby improving the heat exchange efficiency of the heat exchange tube. When the mobile air heater operates in oil heating mode, the flame shield is perpendicular to the axis of the air passage and is located between the burner and the heat exchange tube to block the flame generated by the burner and prevent the flame from directly heating the heat exchange tube.

[0008] As a possible embodiment, the storage tank includes a water tank and a fuel tank, an isolation plate is provided between the water tank and the fuel tank, the isolation plate is used to separate the water tank from the fuel tank, the fuel tank is located above the water tank, and a plurality of cooling fins are installed in the fuel tank, and the plurality of cooling fins are connected to the water tank.

[0009] As a possible implementation, the heat exchange tube has a spiral structure, and the spiral radius of the heat exchange tube gradually increases from the air inlet end to the air outlet end; wherein, one end of the heat exchange tube is fixedly connected to a water injection pipe, and the other end of the heat exchange tube is fixedly connected to a water outlet pipe.

[0010] As a possible embodiment, a water pump is fixedly installed on the top of the storage box housing, the water pump input end is connected to the water outlet pipe, the water pump output end is fixedly connected to a drain pipe, and the drain pipe is connected to the water tank;

[0011] An electric heater is also fixedly installed on the top of the storage box shell, the input end of the electric heater is fixedly connected to one end of the water inlet pipe, the other end of the water inlet pipe is connected to the water tank, and the output end of the electric heater is connected to the water injection pipe.

[0012] As a possible embodiment, an oil pump is also fixedly installed on the top of the storage box shell, the input end of the oil pump is connected to one end of the oil pipe, the other end of the oil pipe is connected to the fuel tank, and the output end of the oil pump is connected to a fuel pipe, which is used to transport fuel to the burner.

[0013] As a possible embodiment, the burner includes a support ring and a shell, the shell is fixedly mounted on the inner wall of the support ring through a support rod, and the support ring is fixedly mounted on the inner wall of the warm air pipe, a nozzle and a spark plug for igniting the nozzle are installed in the shell; wherein one end of the fuel pipe is connected to the nozzle.

[0014] As a possible implementation, a micro motor is fixedly mounted on the outer wall of the heating duct housing, and the output shaft of the micro motor is coaxially connected to a rotating rod, one end of the rotating rod passes through the heating duct housing and is fixedly connected to the side wall of the flame shield.

[0015] As a possible embodiment, the flame baffle is located between the burner and the water supply pipe, and the flame baffle can rotate within the range of 0° to 360°. When the flame baffle rotates to a state parallel to the axis of the gas path, the flame baffle is used to increase the contact efficiency between the water supply pipe and the airflow. When the flame baffle rotates to a state perpendicular to the axis of the gas path, the flame baffle is used to block the flame emitted by the burner. Beneficial effects

[0016] Compared with the prior art, the heater provided by this application has at least the following three beneficial effects:

[0017] 1. The mobile air heater provided in the present application has two working modes: water heating and fuel oil. These two working modes can operate independently. The water heating mode has a smaller output power and can provide a lower warm air temperature. The fuel oil mode has a larger output power and can provide a higher warm air temperature. When the amount of heat required from the heater decreases, the heater can be switched from the fuel oil mode to the water heating mode. The water heating mode uses electric energy to provide heat, which reduces fuel consumption and thus reduces the amount of harmful gases produced by incomplete combustion of the fuel. In addition, when fuel needs to be added and the fuel tank is waiting to cool, the mobile air heater can operate in the water heating mode, so it does not need to be shut down and can continuously output warm air. Furthermore, the water heating and fuel oil working modes can operate at the same time and output heating power at the same time. Compared with a single working mode, the output heating power is greater. In other words, the mobile air heater provided in the present application is a high-power air heater.

[0018] 2. To switch between water-heating and fuel-fired modes, this application utilizes a flame shield. When the mobile heater is operating in water-heating mode, the flame shield is parallel to the axis of the air passage, ensuring unobstructed airflow and sufficient contact with the heat exchange tubes, improving heat exchange efficiency. When the mobile heater is operating in fuel-fired mode, the flame shield is perpendicular to the axis of the air passage to block the burner flame, preventing it from directly burning the heat exchange tubes and extending their service life.

[0019] 3. By rotating the flame deflector and adjusting the angle between the flame deflector and the air passage axis, the flame deflector's degree of obstruction of the air passage can be infinitely adjusted, thereby adjusting the heater's air volume. When the flame deflector is parallel to the air passage axis, the flame deflector's degree of obstruction is minimal, and the heater's air volume is maximum. When the flame deflector is perpendicular to the air passage axis, the flame deflector's degree of obstruction of the air passage is maximum, and the heater's air volume is minimum. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] FIG1 is a schematic diagram of the overall structure of a mobile air heater according to an embodiment of the present application;

[0021] FIG2 is a second schematic diagram of the overall structure of the mobile air heater provided in an embodiment of the present application;

[0022] FIG3 is a schematic diagram of an overall cross-sectional perspective structure of a mobile air heater provided in an embodiment of the present application;

[0023] FIG4 is a schematic diagram of a flame shield of a mobile air heater provided in an embodiment of the present application installed inside a warm air duct;

[0024] FIG5 is a schematic diagram of a warm air duct and its internal structure of a mobile air heater provided in an embodiment of the present application; wherein the warm air duct, the burner housing, and the support ring are in a half-section state;

[0025] FIG6 is a schematic diagram of a storage box of a mobile air heater and a structure attached thereto according to an embodiment of the present application;

[0026] FIG7 is a schematic diagram of the water supply pipeline structure of the mobile air heater provided in an embodiment of the present application;

[0027] FIG8 is a schematic diagram of the overall cross-sectional plan structure of a mobile air heater provided in an embodiment of the present application;

[0028] FIG9 is a schematic diagram showing the rotation angle of the flame shield of the mobile air heater according to an embodiment of the present application; wherein the flame shield is parallel to the axis of the air passage;

[0029] FIG10 is a second schematic diagram of the rotation angle of the flame shield of the mobile air heater provided in an embodiment of the present application; wherein the flame shield is perpendicular to the axis of the air passage;

[0030] FIG11 is an enlarged view of point A in FIG8 .

[0031] The meaning of each number in the figure is:

[0032] 1. Storage box;

[0033] 101, water tank; 1011, cooling fins; 1011a, first opening; 1011b, second opening; 102, fuel tank; 1021, isolation plate;

[0034] 103, oil pump; 1031, oil pipeline; 1032, fuel pipe;

[0035] 104. Electric heater; 1041. Water inlet pipe; 1042. Drain pipe;

[0036] 105. Water pump;

[0037] 2. Control base;

[0038] 3. Warm air duct;

[0039] 301, combustion chamber; 3011, air inlet; 3012, air outlet;

[0040] 302, flame shield; 303, micro motor; 3031, rotating rod;

[0041] 401, wheels; 402, support legs; 403, push handle frame;

[0042] 5. Burner; 501. Support ring; 502. Shell; 5021. Nozzle;

[0043] 6. Motor; 601. Fan blade;

[0044] 7. Water supply pipeline; 701. Support frame; 702. Heat exchange tube; 7021. Water injection pipe; 7022. Water outlet pipe. Modes for Carrying Out the Invention

[0045] The following will clearly and completely describe the technical solutions of the embodiments of this application in conjunction with the drawings in the specification of this application; it is obvious that the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments described below, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of this application.

[0046] It should be noted that in the following description, terms indicating directions or positional relationships, such as "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., are all based on the directions or positional relationships shown in the accompanying drawings; the use of these terms is to simplify the description so that the implementation methods of this application can be clearly presented; these terms do not indicate or imply that the relevant technical features must have a specific direction or position, or be constructed or operated in a specific orientation, and therefore cannot be understood as limiting this application. In addition, the term "plurality", unless otherwise specified, refers to two or more.

[0047] Please refer to Figures 1 to 5. The mobile air heater provided in this application may include a storage box 1; a wheel 401 is rotatably installed at one end of the bottom of the storage box 1, a support leg 402 is fixedly installed at the other end of the bottom of the storage box 1, and a push handle frame 403 is also fixedly installed on the side wall of the storage box 1, a control base 2 is fixedly installed on the top of the storage box 1, and a warm air pipe 3 is fixedly installed on the control base 2; wherein, an air path is provided in the warm air pipe 3, an air inlet 3011 is provided at one end of the air path, a motor 6 is fixedly installed at one end near the air inlet 3011, a fan blade 601 is fixedly installed on the output shaft of the motor 6, an air outlet 3012 is provided at the other end of the air path, and a burner 5 for supplying fuel combustion is installed in the air path. 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, and the support ring 501 is fixedly mounted on the inner wall of the gas path; a gap is left between the support ring 501 and the shell 502 for air flow to pass through; a nozzle 5021 and a spark plug for igniting the nozzle 5021 are installed in the shell 502; wherein, one end of the fuel pipe 1032 is connected to the nozzle 5021.

[0048] A combustion chamber 301 is provided on one side of the burner 5, within which a flame baffle 302 is installed to block the flame. Optionally, the flame baffle 302 is disc-shaped, and its outer diameter is smaller than the inner diameter of the air passage (i.e., the inner diameter of the heating pipe 3). Therefore, even if the flame baffle 302 is rotated to a position perpendicular to the air passage, it will not completely block the air passage. In this case, a gap remains 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 pipe 3), allowing airflow to pass through. By adjusting the angle of the flame deflector 302, the airflow path within the air passage can be changed. To rotate the flame deflector 302 to adjust its angle, a micromotor 303 can be fixedly mounted on the outer wall of the housing of the warm air duct 3. The output shaft of the micromotor 303 is coaxially connected to a rotating rod 3031. One end of the rotating rod 3031 extends through the housing of the warm air duct 3 and is fixedly connected to the side wall of the flame deflector 302. When the angle of the flame deflector 302 needs to be adjusted, the micromotor 303 drives the rotating rod 3031 to rotate, thereby rotating the flame deflector 302, thereby changing the angle between the flame deflector 302 and the axis of the air passage (i.e., the straight line or curve extending along the direction of the air passage). Specifically, the "micromotor" mentioned above refers to a motor with an output power not exceeding 500W.

[0049] Changing the angle of the flame baffle 302 (i.e., the angle between the flame baffle 302 and the axis of the gas channel) alters the flow path of gas within the channel. When the flame baffle 302 is perpendicular to the channel axis, the angle is 90°. When the flame baffle 302 is parallel to the channel axis (if the axis is a straight line) or tangent to the channel axis (if the axis is a curve), the angle is 0°. As the angle of the flame baffle 302 changes from 90° to 0°, the flame baffle's airflow blocking effect gradually decreases. When the flame baffle 302's angle is 0°, the airflow is virtually unobstructed and blows directly toward the heat exchange tube 702. At this point, the heat exchange between the heat exchange tube 702 and the airflow is more effective, thereby enhancing the heating effect of the water-cooled heater.

[0050] When the amount of heat required to be provided by the heater is reduced, in order to avoid incomplete combustion of the fuel and the exhaust gas containing a large amount of harmful gases, the heater provided in this application can be switched to water heating mode (heating); as shown in Figures 5 and 6, the water supply pipe 7 is installed in the air channel near the end of the air outlet 3012, and an electric heater 104 is installed at the input end of the water supply pipe 7, and a water pump 105 is installed at the output end of the water supply pipe 7. The water supply pipe 7 is used to supply the output heat to the heater through water circulation.

[0051] Optionally, as shown in Figures 6 and 7 , a water injection pipe 7021 is fixedly mounted on one end of the heat exchange tube 702, and a water outlet pipe 7022 is fixedly mounted on the other end of the heat exchange tube 702. A water pump 105 is fixedly mounted on the top of the housing of the storage tank 1, with the input end of the water pump 105 communicating with the water outlet pipe 7022, and the output end of the water pump 105 is fixedly connected to a drain pipe 1042, which is in communication with the water tank 101. Driven by the water pump 105, the water in the water tank 101 can flow sequentially through the water injection pipe 7021, the heat exchange tube 702, the water outlet pipe 7022, the water pump 105, the drain pipe 1042, and then flow into the water tank 101 through the drain pipe 1042, forming a water cycle.

[0052] Alternatively, as shown in Figure 6, an electric heater 104 is fixedly installed on the top of the storage box 1 housing. The input end of the electric heater 104 is fixedly connected to a water inlet pipe 1041. One end of the water inlet pipe 1041 is connected to the input end of the electric heater 104, and the other end is communicated with the water tank 101. The output end of the electric heater 104 is communicated with the water injection pipe 7021. Starting the water pump 105 can transport the water in the water tank 101 into the heat exchange tube 702, and the water can be heated by the electric heater 104. The water heated by the electric heater 104 is sent into the heat exchange tube 702, and at the same time, an air flow is blown out toward the air outlet 3012 through the fan blade 601. Then, the air flow can carry away the heat in the heat exchange tube 702 and blown out from the air outlet 3012 to form warm air, thereby realizing the heat output of the heater.

[0053] Optionally, as shown in Figure 7, the water supply pipeline 7 includes at least two support frames 701. The two support frames 701 are used to fix the ends of the heat exchange tube 702, and the heat exchange tube 702 is fixedly installed between the two support frames 701. The support frame 701 can be an annular structure, and the outer wall of the support frame 701 is fixedly connected to the inner wall of the gas channel.

[0054] In order to reduce the wind resistance in the air path and improve the heat exchange efficiency of the heat exchange tube 702, optionally, as shown in Figures 5 and 7, the heat exchange tube 702 has a spiral structure, and the spiral radius of the heat exchange tube 702 gradually increases from the air inlet 3011 end to the air outlet 3012 end; wherein, one end of the heat exchange tube 702 is connected to the water injection pipe 7021, and the other end of the heat exchange tube 702 is connected to the water outlet pipe 7022.

[0055] When existing fuel heaters are low on fuel, they must wait until the fuel tank has fully cooled before adding fuel. This long wait for the fuel tank to cool naturally results in prolonged heater downtime, impacting the user's ability to heat. The heater provided in this application is equipped with a circulating water circuit that assists in cooling the fuel tank 102. Specifically, when the circulating water circuit is operating, airflow removes heat from the water supply line 7, forming low-temperature cold water. The cooled low-temperature cold water flows through the drain pipe 1042 into the water tank 101. The water tank 101 is positioned adjacent to the fuel tank 102, and the low-temperature cold water in the water tank 101 can rapidly cool the fuel tank 102 through heat transfer. Optionally, a plurality of heat dissipation fins 1011 can be installed in the fuel tank 102, and these heat dissipation fins 1011 are all connected to the water tank 101. The cold water in the water tank 101 indirectly contacts the fuel in the fuel tank 102 through the cooling fins 1011. The cooling fins 1011 increase the contact area between the two, thereby improving the fuel cooling effect. Optionally, the cooling fins 1011 may be hollow to connect to the water tank 101. As shown in Figure 11, the cooling fins 1011 can be fixed to the isolation plate 1021 between the fuel tank 102 and the water tank 101, extending upward into the fuel tank 102. The lower ends of the cooling fins 101 define a first opening 1011a and a second opening 1011b, which serve as a water inlet and outlet, respectively. Cool water in the fuel tank 101 can enter and exit the cooling fins 1011 through these two openings. The high-temperature fuel in the fuel tank 102 contacts the outer surface of the heat sink fins 1011, transferring heat to the heat sink fins 1011; the cold water in the water tank 101 enters the interior of the heat sink fins 1011, taking away the heat from the heat sink fins 1011; the heat is transferred from the high-temperature fuel to the low-temperature cold water, thereby achieving cooling of the fuel tank 102.

[0056] In order to make the mobile heater have both water heating and fuel heating working modes, optionally, as shown in Figures 3 and 8, the storage tank 1 can be set to a mixed type of water tank 101 and fuel tank 102, that is, the storage tank 1 includes a water tank 101 and a fuel tank 102; an isolation plate 1021 is provided between the water tank 101 and the fuel tank 102, and the isolation plate 1021 is used to separate the water tank 101 from the fuel tank 102; the fuel tank 102 can be located above the water tank 101.

[0057] In order to supply fuel to the burner 5, optionally, as shown in Figures 6 and 8, an oil pump 103 is also fixedly installed on the top of the shell of the storage box 1, and an oil pipe 1031 is installed at the input end of the oil pump 103; one end of the oil pipe 1031 is connected to the input end of the oil pump 103, and the other end is connected to the fuel tank 102; a fuel pipe 1032 is installed at the output end of the oil pump 103, and the fuel pipe 1032 is used to transport fuel to the burner 5.

[0058] The flame baffle 302 is located between the burner 5 and the water supply pipe 7. Optionally, the flame baffle 302 can rotate within the range of 0° to 360°; that is, when the normal line of the flame baffle 302 and the axis of the gas path are regarded as two vectors (with directions), the angle between the two vectors can vary within the range of 0° to 360°.

[0059] When the mobile air heater switches to water heating mode, as shown in Figure 9, the flame baffle 302 rotates to a state parallel to the axis of the air path; at this time, the flame baffle 302 will hardly block the airflow blown out by the rotation of the fan blade 601, and the airflow will blow directly toward the water supply pipe 7, thereby increasing the contact efficiency between the water supply pipe 7 and the airflow, and improving the heat exchange efficiency of the heat exchange tube 702.

[0060] When the mobile air heater switches to fuel mode, as shown in Figure 10, the flame baffle 302 rotates to a state perpendicular to the axial direction of the air path; at this time, the flame baffle 302 is blocked between the burner 5 and the heat exchange tube 702. The flame baffle 302 can block the flame emitted by the burner 5 and prevent the flame from directly baking the heat exchange tube 702.

[0061] The working process of the mobile air heater provided in this application is described as follows. When the air heater uses fuel to work independently / heat, the oil pump 103 is started, and the oil pump 103 sends the fuel in the fuel tank 102 into the nozzle 5021 through the fuel pipe 1032, and is ejected from the nozzle 5021; at the same time, the spark plug is ignited to ignite the fuel ejected from the nozzle 5021, causing the fuel to burn, and the motor 6 drives the fan blade 601 to rotate, sending air from the air inlet 3011 into the air path; at this time, the heat generated by the combustion of the fuel flows along the air flow toward the air outlet 3012, and flows out of the air path from the air outlet 3012, forming warm air, realizing the heat output of the air heater. When the air heater uses fuel to heat independently, the flame shield 302 is perpendicular to the axis of the air path and blocks the front of the nozzle 5021; this can not only prevent the flame generated by the combustion of the fuel from directly baking the heat exchange tube, but also prevent the flame from ejecting from the air outlet 3021, ensuring the safety of the air heater.

[0062] When the heater operates independently / provides heating using water heating, oil pump 103 is turned off, suspending fuel heating. Water pump 105 activates, pumping water from water tank 101 to electric heater 104. Electric heater 104 activates, heating the water. Driven by water pump 105, the heated water enters heat exchange tube 702. Simultaneously, motor 6 rotates fan blades 601, directing air from air inlet 3011 into the air passage, forming an airflow. The airflow is heated as it passes through heat exchange tube 702, and then blown out of air outlet 3012, forming warm air and achieving heat output from the heater. When the heater operates independently / provides heating using water heating, micromotor 303 rotates flame shield 302 via rotating rod 3031, rotating it parallel to the axis of the air passage. At this point, flame shield 302 barely obstructs airflow toward air outlet 3012.

[0063] When the heater is operating in fuel heating mode, if the fuel is insufficient, the water heating mode can be activated first, and then the fuel heating mode can be stopped, waiting for the fuel tank 102 to cool before adding fuel. At this time, the heater is still operating, and the warm air supply is not interrupted. In addition, when the heater is operating in water heating mode, the low-temperature cold water generated after passing through the heat exchange tube 702 enters the water tank 101 through the drain pipe 1042, cooling the fuel tank 102 adjacent to the water tank 101, rapidly cooling the fuel tank 102 and completing the refueling as soon as possible. In particular, the fuel tank 102 can be provided with heat dissipation fins 1011 connected to the water tank 101 to increase the heat dissipation area of ​​the high-temperature fuel, thereby further improving the heat dissipation efficiency and reducing the cooling time of the fuel tank 102.

Claims

1. A mobile air heater, comprising a material storage box (1), a wheel (401) is rotatably mounted on one end of the bottom of the material storage box (1), a support leg (402) is fixedly mounted on the other end of the bottom of the material storage box (1), and a handle frame (403) is fixedly mounted on the side wall of the material storage box (1), a control base (2) is fixedly mounted on the top of the material storage box (1), and a warm air pipe (3) is fixedly mounted on the control base (2); wherein, An air passage is provided in the warm air pipe (3), an air inlet (3011) is provided at one end of the air passage, a motor (6) is fixedly mounted at one end close to the air inlet (3011), a fan blade (601) is fixedly mounted on the output shaft of the motor (6), and an air outlet (3012) is provided at the other end of the air passage, characterized in that: A burner (5) using oil as fuel is installed in the gas passage, a combustion chamber (301) is provided on one side of the burner (5), a flame baffle (302) is rotatably installed in the combustion chamber (301), the flame baffle (302) is used to block the flame generated by the burner (5), and is used to change the flow path of the airflow in the gas passage by rotating itself; and The mobile air heater further comprises a water supply pipeline (7), the water supply pipeline (7) being installed in the air passage at one end close to the air outlet (3012), the water supply pipeline (7) being used for providing heat output by the mobile air heater through water circulation, the water supply pipeline (7) comprising two support frames (701), the support frames (701) being annular in structure, and the outer wall of the support frames (701) being fixedly connected to the inner wall of the warm air pipe (3), a heat exchange tube (702) being fixedly installed between the two support frames (701), the input end of the heat exchange tube (702) being installed with an electric heater (104), and the output end of the heat exchange tube (702) being installed with a water pump (105); wherein: The mobile air heater has two working modes: water heating and oil heating. When the mobile air heater works in the water heating mode, the flame baffle (302) is parallel to the axis of the air path channel, and the flame baffle (302) does not block the airflow, so as to increase the contact efficiency between the airflow and the heat exchange tube (702) and thus improve the heat exchange efficiency of the heat exchange tube (702); when the mobile air heater works in the oil heating mode, the flame baffle (302) is perpendicular to the axis of the air path channel, and the flame baffle (302) is blocked between the burner (5) and the heat exchange tube (702) to block the flame generated by the burner (5) and prevent the flame from directly baking the heat exchange tube (702).

2. The mobile air heater according to claim 1, characterized in that: The storage tank (1) comprises a water tank (101) and a fuel tank (102); an isolation plate (1021) is provided between the water tank (101) and the fuel tank (102); the isolation plate (1021) is used to separate the water tank (101) from the fuel tank (102); the fuel tank (102) is located above the water tank (101); and a plurality of heat dissipation fins (1011) are installed in the fuel tank (102); and the plurality of heat dissipation fins (1011) are all connected to the water tank (101).

3. The mobile air heater according to claim 2, characterized in that: The heat exchange tube (702) has a spiral structure, and the spiral radius of the heat exchange tube (702) gradually increases from the air inlet (3011) end to the air outlet (3012) end; wherein one end of the heat exchange tube (702) is fixedly connected to a water injection pipe (7021), and the other end of the heat exchange tube (702) is fixedly connected to a water outlet pipe (7022).

4. The mobile air heater according to claim 3, characterized in that: A water pump (105) is fixedly installed on the top of the shell of the material storage box (1), the input end of the water pump (105) is connected to the water outlet pipe (7022), and the output end of the water pump (105) is fixedly connected to a drainage pipe (1042), and the drainage pipe (1042) is connected to the water tank (101); An electric heater (104) is also fixedly mounted on the top of the shell of the storage box (1); the input end of the electric heater (104) is fixedly connected to one end of a water inlet pipe (1041); the other end of the water inlet pipe (1041) is connected to the water tank (101); and the output end of the electric heater (104) is connected to a water injection pipe (7021).

5. The mobile air heater according to claim 1, characterized in that: An oil pump (103) is also fixedly mounted on the top of the shell of the storage box (1); the input end of the oil pump (103) is connected to one end of an oil delivery pipe (1031); the other end of the oil delivery pipe (1031) is connected to the fuel tank (102); the output end of the oil pump (103) is connected to a fuel pipe (1032); the fuel pipe (1032) is used to deliver fuel to the burner (5).

6. The mobile air heater according to claim 5, characterized in that: The burner (5) comprises a support ring (501) and a shell (502); the shell (502) is fixedly mounted on the inner wall of the support ring (501) via a support rod, and the support ring (501) is fixedly mounted on the inner wall of the warm air pipe (3); a nozzle (5021) and a spark plug for igniting the nozzle (5021) are installed in the shell (502); wherein one end of the fuel pipe (1032) is connected to the nozzle (5021).

7. The mobile air heater according to claim 1, characterized in that: A micro motor (303) is fixedly mounted on the outer wall of the shell of the warm air pipe (3); the output shaft of the micro motor (303) is coaxially connected to a rotating rod (3031); one end of the rotating rod (3031) passes through the shell of the warm air pipe (3) and is fixedly connected to the side wall of the flame baffle (302).

8. The mobile air heater according to claim 1, characterized in that: The flame baffle (302) is located between the burner (5) and the water supply pipeline (7), and the flame baffle (302) is rotatable within a range of 0° to 360°.

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