Portable gas heating device

Abstract

The invention discloses a portable fuel gas heating device, and relates to the technical field of heating equipment, a gas inlet header pipe can introduce fuel gas to a flameout protection module and a main burner system under the control of a main valve, and the main burner system comprises a nozzle and a profiling furnace end which can be firmly installed in a body frame. The body frame protects the profiling furnace end in the circumferential direction, at least one side wall of the body frame is provided with a side interlayer cavity, the upper top of the body frame is provided with a top interlayer cavity, the lower end of the side interlayer cavity and an exhaust port of the top interlayer cavity are communicated with the outside, and the side interlayer cavity is communicated with the top interlayer cavity. The temperature sensor transmits a signal to the main valve, the main valve controls the gas inlet header pipe to supply gas to the main burner system, flames on the soft fire burner system ignite gas overflowing from the surface of the profiling furnace end, and the anti-toppling switch can send a signal to the main valve to stop supply of all gas when detecting that the body frame topples. According to the invention, the use safety can be improved, and the carrying is convenient.

Description

Technical Field

[0001] The invention relates to the technical field of heating equipment, and in particular to a portable gas heating device. Background Art

[0002] Traditional desktop gas heaters or fire basins cannot achieve the same ornamental value as real fire fireplaces, and their tops and four sides cannot be effectively protected. The temperature of their handles and outer frames cannot meet the requirements of portable mobile heaters. Furthermore, traditional gas heating equipment has safety deficiencies and there are certain risks when using it. Summary of the invention

[0003] The purpose of the present invention is to provide a portable gas heating device to solve the problems existing in the above-mentioned prior art, improve the ornamental value and safety of use, and be easy to carry.

[0004] To achieve the above object, the present invention provides the following solutions:

[0005] The present invention provides a portable gas heating device, comprising an air intake main pipe, a main body frame, a flameout protection module and an anti-dumping switch installed on a base in the main body frame, and a main burner system installed in the main body frame, wherein the air intake main pipe is used to connect a gas tank, and the air intake main pipe can pass gas to the flameout protection module and the main burner system under the control of a main valve, and the main burner system comprises a nozzle, an oxygen mixing pipe and a contoured burner head that can be firmly installed in the main body frame, and the main body frame can protect the circumference of the contoured burner head, and at least one side wall of the main body frame is provided with a side interlayer cavity, and the upper top of the main body frame is provided with a top interlayer cavity, and the lower end of the side interlayer cavity is communicated with the outside world, and the The upper end of the side interlayer cavity is connected with the air inlet of the top interlayer cavity, and the exhaust port of the top interlayer cavity is connected with the outside world. The flameout protection module includes a small fire burner system, an ignition needle and a temperature sensor. The small burner system includes a small nozzle, a small oxygen mixing hole and a small fire burner. When the small fire burner system is ignited by the ignition needle and burns stably, the temperature sensor detects the temperature signal and transmits it to the solenoid valve on the main valve. The solenoid valve on the main valve controls the air intake main pipe to supply gas to the main burner system. The flame on the small fire burner system can ignite the gas overflowing from the surface of the contoured burner head. The anti-dumping switch can send a signal to the solenoid valve on the main valve to stop all gas supply when the main body frame is detected to be dumped.

[0006] Preferably, an internal circulation channel is provided inside the shaped burner head, a metal tube is installed on the shaped burner head, both ends of the metal tube are respectively connected to one end of the internal circulation channel and the air intake manifold, a plurality of grooves are provided on the outer surface of the shaped burner head, small holes are provided on the outer surface of the shaped burner head or in the grooves, the small holes can be connected to the internal circulation channel, and a metal wire is installed in the groove.

[0007] Preferably, the contoured furnace head is made of refractory material; screws are installed at the bottom of the contoured furnace head, and the screws can pass through the bottom plate of the main body frame and be fastened by nuts.

[0008] Preferably, at least one side wall of the main body frame is a non-enclosed side wall, and the area of ​​the non-enclosed portion of the non-enclosed side wall accounts for at least 30% of the non-enclosed side wall.

[0009] Preferably, the thickness of the side interlayer cavity and the top interlayer cavity are both between 5 mm and 50 mm.

[0010] Preferably, the first end of the air intake main pipe is used to connect the gas tank, the second end of the air intake main pipe is connected to the air inlet of the main valve, the first air outlet of the main valve is connected to the air inlet of the small fire burner air pipe of the small fire burner system, the air outlet of the small fire burner air pipe of the small fire burner system is the small fire burner, the second air outlet of the main valve is connected to the nozzle and the oxygen mixing pipe of the main burner system in sequence and then connected to the contoured burner head, when the small fire burner is burning stably, the temperature sensor on the flameout protection module detects a stable signal and transmits it to the solenoid valve on the main valve, the battery valve on the main valve opens the gas supply restriction of the main burner system, and the gas is supplied to the contoured burner head by rotating the knob of the main valve, and the gas overflows onto the surface of the contoured burner head and is ignited by the flame of the small fire burner, and the knob is used to control the gas supply to the small fire burner, control the ignition of the small fire burner, control the gas supply to the contoured burner head of the main burner system and adjust the gas amount.

[0011] Preferably, the temperature sensor is located close to the edge of the small-fire burner, and when the small-fire burner is ignited, the temperature sensor can detect the temperature of the edge flame of the small-fire burner, and when a stable temperature signal is detected, the solenoid valve on the main valve is released from restriction, and the knob on the main valve is rotated to supply gas to the contoured burner head of the main burner system, and when the flames of the small-fire burner and the main burner system are accidentally extinguished and the oxygen content in the surrounding air is lower than the safe content for the human body, the temperature around the temperature sensor will change, the temperature sensor detects the temperature change signal and sends it to the solenoid valve on the main valve, and the solenoid valve on the main valve closes all gas supplies from the main valve to the main burner system and the small-fire burner.

[0012] Preferably, the anti-dump switch can send a signal to the solenoid valve of the main valve when the tilt angle of the main frame is greater than a set angle, and the solenoid valve on the main valve closes the gas supply from the main valve to the small fire burner and the main burner system.

[0013] Preferably, the knob includes an ignition position and a large and small fire adjustment position. When the knob is rotated to the ignition position, the main valve can supply gas to the low-fire burner system. When the knob is pressed, the ignition switch is triggered to control the ignition needle to ignite the low-fire burner. After the temperature sensor senses the stable flame temperature on the low-fire burner, it transmits a signal to the solenoid valve on the main valve. After receiving the signal, the solenoid valve on the main valve opens the main valve to limit the gas supply to the main burner system. By rotating the knob to the low-fire or high-fire position, different flow rates of gas can be supplied to the contoured burner head of the main burner system.

[0014] Preferably, a pressure reducing valve is installed on the main body frame, the air outlet of the pressure reducing valve is connected to the air inlet main pipe, the air inlet interface of the pressure reducing valve can directly install a portable small gas tank, and the air inlet interface of the pressure reducing valve can also be connected to other gas tanks or gas sources through an external pipe.

[0015] Compared with the prior art, the present invention has achieved the following technical effects:

[0016] The portable gas heating device provided by the present invention has an air intake main pipe for connecting to a gas tank, so that the gas in the gas tank can be respectively introduced into a small fire combustion system and a main burner system through the air intake main pipe. The main burner system includes a nozzle, an oxygen mixing pipe and a shaped burner head that can be firmly installed in a main body frame, so as to ensure the safety and portability of the product. The main body frame can protect the circumference of the shaped burner head to improve the protection effect. At least one side wall of the main body frame is provided with a side interlayer cavity, and the upper top of the main body frame is provided with a top interlayer cavity. The lower end of the side interlayer cavity is connected to the outside world, and the upper end of the side interlayer cavity is connected to the air inlet of the top interlayer cavity, and the exhaust port of the top interlayer cavity is connected to the outside world. Therefore, when the main burner system is burning for heating, there is a large temperature difference between the upper and lower parts of the main body frame, so that the air is heated and flows from the low temperature to the high temperature. The flame on the small fire burner system can ignite the gas overflowing from the surface of the contoured burner head, thereby playing the role of safe ignition. The anti-dumping switch can send a signal to the solenoid valve on the main valve to stop all gas supply when the tilt of the main body frame is detected, thereby playing the role of flameout protection, avoiding accidents and reducing risks. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of the structure of the portable gas heating device of the present invention at an angle;

[0019] Figure 2 It is a schematic structural diagram of the portable gas heating device of the present invention at another angle;

[0020] Figure 3 It is a schematic diagram of the installation position of the main burner system in the present invention;

[0021] Figure 4 It is a structural schematic diagram of the flameout protection module and the main burner system in the present invention;

[0022] Figure 5It is a circuit connection schematic diagram in the present invention;

[0023] Figure 6 It is a structural schematic diagram of the contoured burner head in the present invention;

[0024] Figure 7 A schematic diagram of the arrangement position of the gas outlet slots on the contoured burner head of the present invention;

[0025] Figure 8 It is a cross-sectional view of the contoured furnace head of the present invention;

[0026] In the figure: 1-main body frame, 2-handle, 3-fuel bin, 4-knob, 5-top interlayer cavity, 6-side interlayer cavity, 7-contoured burner head, 8-temperature sensor, 9-low-fire burner system, 10-ignition needle, 11-pressure reducing valve, 12-air intake main pipe, 13-main burner system, 14-main valve, 15-solenoid valve, 16-main burner gas pipe, 17-low-fire burner gas pipe, 18-flameout protection module, 19-anti-dumping switch, 20-metal pipe, 21-screw, 22-small hole, 23-metal wire, 24-internal circulation channel. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] The purpose of the present invention is to provide a portable gas heating device to solve the problems existing in the prior art, improve the ornamental value and safety of use, and be easy to carry.

[0029] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] like Figure 1-Figure 8As shown, this embodiment provides a portable gas heating device, including an air intake main pipe 12, a main body frame 1, a flameout protection module 18 and an anti-dumping switch 19 installed on a base in the main body frame 1, and a main valve 14 installed in the main body frame 1. The air intake main pipe 12 is used to connect the gas tank, so that the gas in the gas tank is passed through the main valve 14 through the air intake main pipe 12 and then respectively introduced into the small fire burner system 9 and the main burner system 13. The main burner system 13 includes a nozzle, an oxygen mixing pipe and a main valve 14 that can be firmly installed in the main body frame. The shaped burner head 7 in the frame ensures that the shaped burner head 7 is safe and does not move when carried. The main body frame 1 can protect the circumference of the shaped burner head 7, such as glass, metal plate, metal grille, metal mesh and metal line frame, etc. Those skilled in the art can adaptably select according to actual needs to improve the protection effect. At least one side wall of the main body frame 1 is provided with a side interlayer cavity 6, and the upper top of the main body frame 1 is provided with a top interlayer cavity 5. The lower end of the side interlayer cavity 6 is communicated with the outside world, and the upper end of the side interlayer cavity 6 is communicated with the air inlet of the top interlayer cavity 5. The exhaust port of the top interlayer cavity 5 is connected to the outside world, and when the contoured burner head 7 is burning for heating, there is a large temperature difference between the upper and lower parts of the main frame, so that the air is heated and flows from the low temperature to the high temperature, realizing the automatic flow of air to cool the product frame to meet the temperature requirements of the frame during use. The flameout protection module 18 includes a small fire burner system 9, an ignition needle 10 and a temperature sensor 8. The small burner system 9 includes a small nozzle, a small oxygen mixing hole and a small fire burner. The small fire burner system 9 is ignited by the ignition needle 10 and During stable combustion, the temperature sensor 8 detects the temperature signal and transmits it to the solenoid valve 15 on the main valve 14. The main valve 14 controls the air intake manifold 12 to supply gas to the contoured burner head 7 through the knob 4. The flame on the low-fire burner system 9 can ignite the gas overflowing from the surface of the contoured burner head 7, thereby playing a role in safe ignition. The anti-dump switch 19 can send a signal to the solenoid valve 15 on the main valve 14 to stop all gas supply when it detects that the main body frame 1 is tilted to a set angle, thereby playing a role in flameout protection, avoiding accidents and reducing risks.

[0031] Specifically, the shaped burner head 7 can be various decorative shapes such as imitating wood and volcanoes, thereby imitating the effect of flames burning on the shaped burner head 7 of wood or other decorative shapes, which has good ornamental value. An internal flow channel 24 is provided inside the shaped burner head 7 for the circulation of gas. A metal pipe 20 is installed on the shaped burner head 7. The two ends of the metal pipe 20 are respectively connected to one end of the internal flow channel 24 and the air intake main pipe 12, and then the gas in the gas tank is passed into the internal flow channel 24 through the metal pipe 20 and the air intake main pipe 12. The outer surface of the shaped burner head 7 is provided with a plurality of grooves. A small hole 22 is opened on the outer surface or in the groove, and the small hole 22 can be connected to the internal circulation channel 24, so that the gas in the internal circulation channel 24 can overflow through the small hole 22 and burn outside the small hole 22 to form the effect of burning on the surface of the contoured burner head 7. A metal wire 23 is installed in the groove. The metal wire 23 can withstand high temperatures. The metal wire 23 is used to disperse and mix oxygen with the gas overflowing from the small hole 22, so that the combustion is more complete, thereby reducing the carbon monoxide content in the flue gas emissions. At the same time, the metal wire 23 will be burned red during the combustion process, thereby increasing the combustion atmosphere and increasing the thermal radiation heating effect.

[0032] The profiling burner head 7 is made of refractory material and only serves to imitate the burning effect of real wood.

[0033] A screw 21 is installed at the bottom of the contoured furnace head 7. The screw 21 can pass through the bottom plate of the main frame 1 and be fastened by a nut, thereby fixing the contoured furnace head 7 in the main frame 1 to prevent the contoured furnace head 7 from moving when moving and carrying.

[0034] At least one side wall of the main body frame 1 is a non-enclosed side wall, and the area of ​​the non-enclosed part of the non-enclosed side wall is at least 30% of the non-enclosed side wall, so that the burning flame on the surface of the contoured burner head 7 can be observed, and the air inside the main body frame 1 and the outside can be circulated, that is, it is convenient for the outside air to effectively enter the main body frame 1 to improve the combustion effect, and it is convenient for the hot gas generated by the combustion to be discharged to the outside. A handle 2 is provided at the upper end of the main body frame 1.

[0035] The thickness of the side interlayer cavity 6 and the top interlayer cavity 5 is between 5 mm and 50 mm, so that air can flow effectively in the side interlayer cavity 6 and the top interlayer cavity 5 to achieve heat dissipation. The side interlayer cavity 6 and the top interlayer cavity 5 of the main body frame 1 may also have other air inlet or outlet holes, and the side interlayer cavity 6 and the top interlayer cavity 5 may have various shapes.

[0036] The flameout protection module 18 is an ODS (OXYGRN DEPLETION SENSOR) protection module. The first end of the air intake main pipe 12 is used to connect to the gas tank. The second end of the air intake main pipe 12 is connected to the air inlet of the main valve 14, and then the gas in the gas tank is passed into the main valve 14 through the air intake main pipe 12 to realize the supply of gas. When the knob 4 of the main valve 14 is rotated to the ignition position, the low-fire burner system 9 includes a small nozzle, a small oxygen mixing pipe and a low-fire burner. The first air outlet of the main valve 14 is connected to the low-fire burner through the low-fire burner air pipe 17 of the low-fire burner system 9 to supply gas to the low-fire burner. The gas is discharged through the small nozzle of the low-fire burner. The second air outlet of the main valve 14 is sequentially connected to the nozzle and the oxygen mixing pipe of the main burner system 13 and then to the contoured burner head 7. When gas is supplied to the low-fire burner, the low-fire burner is connected to the main burner system 13. By pressing the knob 4 of the main valve 14, the ignition switch is triggered, and the low-fire burner is burned through the ignition needle 10. The temperature sensor 8 on the flameout protection module 18 senses a stable temperature signal and sends a signal to the solenoid valve 15 on the main valve 14. The solenoid valve 15 opens the restriction of the second air outlet of the main valve 14, and the knob 4 on the main valve 14 is rotated to the low-fire or high-fire gear. The main valve 14 supplies gas to the contoured burner 7 through the main burner gas pipe 16 of the main burner system 13 and overflows. The gas overflowing from the surface of the contoured burner 7 is ignited by the flame on the low-fire burner to achieve safe ignition and combustion. The knob 4 is used to control the gas supply to the low-fire burner, and is also used to trigger the ignition switch to energize the ignition needle 10 for ignition, and is also used to control the gas supply to the contoured burner 7 and adjust the gas supply amount.

[0037] The temperature sensor 8 is close to the edge of the low-fire burner, and when the low-fire burner is ignited, the temperature sensor 8 can detect the temperature of the low-fire burner, and when a stable high-temperature signal is detected (the low-fire burner is burning stably at this time), the solenoid valve 15 opens the restriction on the main valve 14, turns on the gas through the knob 4, and supplies the gas to the profiling burner 7 through the main burner gas pipe 16 of the main burner system 13. The flame on the low-fire burner ignites the gas overflowing from the profiling burner 7 to the flame on the surface of the profiling burner 7. The device starts to work and run. When the flame on the low-fire burner or the profiling burner 7 is accidentally extinguished (for example, by wind and rain), or the oxygen content in the surrounding air is lower than the safe oxygen content required by the human body, the temperature sensor 8 detects the temperature change and sends a signal to the solenoid valve 15 on the main valve 14. The solenoid valve 15 controls the main valve 14 to actively close all gas supplies. At this time, the low-fire burner and the profiling burner 7 will be extinguished due to lack of gas supply, thereby preventing the risk of gas overflow during accidental extinguishing and the safety risk caused by insufficient oxygen content in the surrounding area, thereby ensuring the safety of use.

[0038] The anti-dump switch 19 can send an angle signal to the solenoid valve 15 on the main valve 14 when the main frame 1 dumps to a dumping angle greater than a set angle, and control the main valve 14 to shut off all gas supplies through the solenoid valve 15, thereby actively shutting off the gas flameout when dumping.

[0039] The knob 4 includes an ignition position and a flame size adjustment position. When the knob 4 is rotated to the ignition position, the main valve 14 can control the gas supply to the low-fire burner system 9. When the knob 4 is pressed, the main valve 14 can trigger the ignition switch to control the ignition needle 10 to ignite the low-fire burner. When the flames of the low-fire burner and the main burner system 13 are accidentally extinguished and the oxygen content of the surrounding air is lower than the safe content for the human body, the temperature around the temperature sensor 8 will change. After the temperature sensor 8 senses the stable flame temperature on the low-fire burner, it transmits a signal to the solenoid valve 15 on the main valve 14. After receiving the signal, the solenoid valve 15 opens the restriction on the main valve 14 to supply gas to the contoured burner head 7. By rotating the knob 4 to different positions in the flame size adjustment position, the amount of gas supplied to the contoured burner head 7 can be adjusted, thereby adjusting the size of the burning flame on the contoured burner head 7.

[0040] A pressure reducing valve 11 is installed on one side of the main body frame 1, and the air outlet end of the pressure reducing valve 11 is connected to the air inlet main pipe 12. The air inlet interface on the pressure reducing valve 11 can directly install a portable small gas tank, and the air inlet interface of the pressure reducing valve 11 can also be connected to other gas tanks or gas sources through an external pipe, thereby realizing the portability of this embodiment.

[0041] A fuel bin 3 is installed on one side of the main body frame 1, and the fuel bin 3 is used to place a gas tank.

[0042] Through the above design, the overall weight of this embodiment can be less than 20kg (excluding the net weight of the gas tank and packaging), which is convenient to carry, and can use the gas tank specifications popular in the market. It has obvious ornamental and heating effects when used, and can meet the relevant market safety requirements; and the portable gas heating device provided by this embodiment, the shape and fixing method of the contoured burner head, the size and position of each interface, the size of the small hole 22 and the gas outlet groove, the material and size of the metal wire 23 can all be adaptively changed according to actual needs. The gas can be propane, butane, or a mixture of propane and butane.

[0043] like Figure 5 As shown, it is a circuit connection diagram of the flameout protection module 18 in this embodiment, wherein the dotted line is the pulse valve microswitch controlling the pulse power supply circuit, the single-dash line is the ignition circuit from the pulse power supply to the ignition needle 10, and the double-dash line is the series circuit from the flameout protection module 18 to the anti-dump switch 19 to the solenoid valve 15.

[0044] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A portable gas heating device, characterized in that: It includes an air intake main pipe, a main body frame, a flameout protection module and an anti-dumping switch installed on a base in the main body frame, and a main burner system installed in the main body frame. The air intake main pipe is used to connect a gas tank. The air intake main pipe can pass gas to the flameout protection module and the main burner system under the control of a main valve. The main burner system includes a nozzle, an oxygen mixing pipe and a contoured burner head that can be firmly installed in the main body frame. The main body frame can protect the circumference of the contoured burner head, and at least one side wall of the main body frame is provided with a side interlayer cavity, the upper top of the main body frame is provided with a top interlayer cavity, the lower end of the side interlayer cavity is communicated with the outside world, and the upper end of the side interlayer cavity is connected to the outside world. The air inlet of the top interlayer cavity is connected, and the exhaust port of the top interlayer cavity is connected to the outside world. The flameout protection module includes a small fire burner system, an ignition needle and a temperature sensor. The small burner system includes a small nozzle, a small oxygen mixing hole and a small fire burner. When the small fire burner system is ignited by the ignition needle and burns stably, the temperature sensor detects the temperature signal and transmits it to the solenoid valve on the main valve. The solenoid valve on the main valve controls the air intake main pipe to supply gas to the main burner system. The flame on the small fire burner system can ignite the gas overflowing from the surface of the contoured burner head. The anti-dumping switch can send a signal to the solenoid valve on the main valve to stop all gas supply when the main body frame is detected to be dumped.

2. The portable gas heating device according to claim 1, characterized in that: An internal circulation channel is provided inside the shaped burner head, and a metal tube is installed on the shaped burner head. The two ends of the metal tube are respectively connected to one end of the internal circulation channel and the air intake main pipe. A plurality of grooves are provided on the outer surface of the shaped burner head. Small holes are provided on the outer surface of the shaped burner head or in the grooves, and the small holes can be connected to the internal circulation channel. A metal wire is installed in the groove.

3. The portable gas heating device according to claim 2, characterized in that: The contoured furnace head is made of refractory material; screws are installed at the bottom of the contoured furnace head, and the screws can pass through the bottom plate of the main body frame and be fastened by nuts.

4. The portable gas heating device according to claim 1, characterized in that: At least one side wall of the main body frame is a non-enclosed side wall, and the area of ​​the non-enclosed part of the non-enclosed side wall accounts for at least 30% of the non-enclosed side wall.

5. The portable gas heating device according to claim 1, characterized in that: The thickness of the side interlayer cavity and the top interlayer cavity is between 5 mm and 50 mm.

6. The portable gas heating device according to claim 1, characterized in that: The first end of the air intake main pipe is used to connect the gas tank, the second end of the air intake main pipe is connected to the air inlet of the main valve, the first air outlet of the main valve is connected to the air inlet of the small fire burner gas pipe of the small fire burner system, the air outlet of the small fire burner gas pipe of the small fire burner system is the small fire burner, the second air outlet of the main valve is connected to the nozzle and the oxygen mixing pipe of the main burner system in sequence and then connected to the contoured burner head, when the small fire burner is burning stably, the temperature sensor on the flameout protection module detects a stable signal and transmits it to the solenoid valve on the main valve, the solenoid valve on the main valve opens the gas supply restriction of the main burner system, and the main valve is opened by rotating the knob of the main valve to supply gas to the contoured burner, and the gas overflows to the surface of the contoured burner and is ignited by the flame of the small fire burner, and the knob is used to control the gas supply to the small fire burner, control the ignition of the small fire burner, control the gas supply to the contoured burner head of the main burner system and adjust the gas volume.

7. The portable gas heating device according to claim 6, characterized in that: The temperature sensor is close to the edge of the small fire burner, and when the small fire burner is ignited, the temperature sensor can detect the temperature of the edge flame of the small fire burner, and when a stable temperature signal is detected, the solenoid valve on the main valve is released from the restriction, and the knob on the main valve is rotated to supply gas to the contoured burner head of the main burner system, and when the flames of the small fire burner and the main burner system are accidentally extinguished and the oxygen content in the surrounding air is lower than the safe content for the human body, the temperature around the temperature sensor will change, the temperature sensor detects the temperature change signal and sends it to the solenoid valve on the main valve, and the solenoid valve on the main valve closes all gas supplies from the main valve to the main burner system and the small fire burner.

8. The portable gas heating device according to claim 7, characterized in that: The anti-dump switch can send a signal to the solenoid valve of the main valve when the tilt angle of the main frame is greater than a set angle, and the solenoid valve on the main valve closes the gas supply from the main valve to the small-fire burner and the main burner system.

9. The portable gas heating device according to claim 8, characterized in that: The knob includes an ignition position and a large and small fire adjustment position. When the knob is rotated to the ignition position, the main valve can supply gas to the low-fire burner system. When the knob is pressed, the ignition switch is triggered to control the ignition needle to ignite the low-fire burner. After the temperature sensor senses the stable flame temperature on the low-fire burner, it transmits a signal to the solenoid valve on the main valve. After receiving the signal, the solenoid valve on the main valve opens the main valve to limit the gas supply to the main burner system. By rotating the knob to the low-fire or high-fire position, different flow rates of gas are supplied to the contoured burner head of the main burner system.

10. The portable gas heating device according to claim 1, characterized in that: A pressure reducing valve is installed on the main body frame, the air outlet of the pressure reducing valve is connected to the air inlet main pipe, the air inlet interface of the pressure reducing valve can directly install a portable small gas tank, and the air inlet interface of the pressure reducing valve can also be connected to other gas tanks or gas sources through an external pipe.

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