Outdoor gas heater

Abstract

The present application belongs to the field of warmers, and particularly relates to an outdoor gas warmer. The outdoor gas warmer comprises, from bottom to top, a gas source storage box, a valve body assembly and a combustion assembly, which constitute a tower-shaped main body as a whole; the gas source storage box is of a box structure, the valve body assembly is internally provided with an electromagnetic flow valve, a multi-pass composite gas valve, an igniter and a burner; the electromagnetic flow valve is used for controlling the gas flow, the multi-pass composite gas valve controls the gas flow direction and guides the gas to the igniter; the igniter is used for ignition; the combustion assembly comprises a glass tube with a lower end cover arranged on the burner to close the burner, and is provided with a gas valve for supplying the combustion gas into the glass tube. The present application can effectively improve the gas utilization rate, simultaneously heats through two forms of heat radiation and contact heat transfer, reduces the energy invalid loss, improves the temperature rising rate, in addition, can visually estimate the flame height to estimate the gas residual amount, can realize continuous and uninterrupted combustion and gas supply, and the use effect is obviously improved.

Description

Technical Field

[0001] This invention belongs to the field of heaters, and particularly relates to an outdoor gas heater. Background Technology

[0002] Gas heaters are a common and widely used heating device, especially in high-latitude regions and cold winter climates where demand is high. They can be broadly categorized into umbrella-type gas heaters and cabinet-style portable gas heaters. These two types are further divided into liquefied petroleum gas (LPG) type and natural gas type, depending on the fuel they use. Umbrella-type gas heaters are also known as outdoor heaters, outdoor gas heaters, umbrella-style heaters, gas stoves, lamp-style heaters, umbrella-shaped heaters, umbrella-shaped stoves, etc.

[0003] However, existing outdoor gas heaters have certain drawbacks, such as the inability to directly visually observe and determine the remaining gas level, the inability to use dual-gas systems simultaneously, and generally an unattractive appearance. The primary form of heat release is through contact heating of the air, resulting in relatively limited energy efficiency and a slow heating rate.

[0004] In addition, the process of changing the gas source of existing gas heaters is cumbersome, and a lot of the original ambient heat will be lost during the replacement process. It usually takes 3 to 5 minutes to replace a single gas tank, and it takes at least 10 minutes to heat up to the required temperature again, resulting in very limited actual use effect. Summary of the Invention

[0005] To address the common problems of existing outdoor gas heaters, such as poor performance, slow heating, low energy efficiency, inability to visually monitor gas reserves, and cumbersome process of replacing gas cylinders that easily leads to significant heat loss, this invention provides an outdoor gas heater.

[0006] The main objective of this invention is:

[0007] 1. Increase the heating rate of the heater;

[0008] II. Improve the effective utilization rate of natural gas;

[0009] Third, it is easier to use and allows for intuitive observation of the remaining gas supply;

[0010] Fourth, by using specific multi-way valves, a unique parallel uninterrupted gas supply can be achieved.

[0011] To achieve the above objectives, the present invention adopts the following technical solution.

[0012] An outdoor gas heater, comprising:

[0013] The gas source storage box, valve body assembly, and combustion assembly are arranged sequentially from bottom to top, forming a tower-shaped main body.

[0014] The gas source storage box is a box-type structure that can store multiple gas raw material tanks. The valve body assembly is embedded in the tower body, with its front side located on the surface of the tower body. Inside, there is an electromagnetic flow valve, a multi-way composite gas valve, an igniter, and a burner.

[0015] The electromagnetic flow valve is used to control the flow rate of the gas raw material tank. The multi-way composite gas valve controls that only one of the gas raw material tanks can supply gas in one direction and guide it to the igniter.

[0016] The igniter is used to ignite the gas, which then burns on the burner.

[0017] The combustion assembly is located directly above the valve body assembly and includes a glass tube fixedly installed to limit the combustion range. The lower end of the glass tube covers and seals the burner directly above it, and a valve is provided on the side of its bottom facing the igniter to supply combustion gas into the glass tube.

[0018] As a preferred option

[0019] The electromagnetic flow valve is equipped with a corresponding rotary switch;

[0020] The multi-way composite gas valve includes a one-way valve and a split sleeve;

[0021] The split head is provided with a main air inlet, a secondary air inlet and an air outlet that are interconnected, and the air outlet is connected to the air inlet end of a one-way valve;

[0022] The main air inlet is used for continuous air supply, and the auxiliary air inlet is used for intermittent air supply.

[0023] Preferably, the cross-section has a U-shaped structure and is provided with a main air inlet, a secondary air inlet and an air outlet that are interconnected. The main air inlet and the secondary air inlet are respectively located at both ends of the U-shaped opening and are separated by a mounting platform.

[0024] The main sealing plate and the auxiliary sealing plate are arranged side by side. One end of the main sealing plate is hinged to the top of the mounting platform to seal the main air inlet, and the other end is a hinge end. The hinge end is provided with a pushing part that is eccentrically set with the hinge shaft. The thickness of the pushing part is greater than the thickness of the main sealing plate, and the vertical distance between its geometric center and the air outlet is less than the vertical distance between the hinge shaft center and the air outlet.

[0025] One end of the sub-sealing plate is hinged to the inner wall of the sleeve head, and the inner wall of the sleeve head is provided with a push groove at the hinge point. The other end abuts against the hinge end of the main sealing plate. The hinge hole used for the hinge of the sub-sealing plate is an oblong hinge hole, in which a hinge shaft and an elastic strip are inserted. The elastic strip and the hinge shaft are arranged side by side, and the elastic strip is located in the hinge hole near the end of the main sealing plate.

[0026] As a preferred option

[0027] The gas source storage box is equipped with an openable and closable door.

[0028] As a preferred option

[0029] The combustion assembly also includes a protective housing that covers the outside of the glass tube.

[0030] As a preferred option

[0031] The gas valve is a three-way check valve with two inlets and one outlet.

[0032] The air outlet is connected to the igniter;

[0033] The air inlets are connected to two gas feedstock tanks respectively.

[0034] As a preferred option

[0035] Each of the two air inlets is equipped with a rotary switch.

[0036] Preferably, the combustion assembly is provided with a heat radiation reflector at its top, which is suspended and fixed directly above the glass tube by a support pole.

[0037] Preferably, the heat radiation reflector has an inverted bowl or dish-shaped structure, and its lower surface is coated with a heat-reflective coating to form a heat-reflective layer.

[0038] The beneficial effects of this invention are:

[0039] This invention can effectively improve the utilization rate of gas by simultaneously heating through both thermal radiation and contact heat transfer, reducing ineffective energy loss and increasing the heating rate. In addition, it can also visually estimate the remaining gas supply by observing the flame height, enabling continuous and uninterrupted combustion and gas supply, and significantly improving the performance. Attached Figure Description

[0040] Figure 1 This is a front view structural diagram of the outdoor gas heater of the present invention;

[0041] Figure 2 The outdoor gas heater of the present invention is along Figure 1 A schematic diagram of the side view structure in the AA direction;

[0042] Figure 3 This is a schematic diagram of the valve body assembly of the present invention;

[0043] Figure 4 This is a schematic diagram of the structure of the multi-port composite gas valve of the present invention;

[0044] Figure 5This is a schematic diagram of the gas supply path of the dual-fuel feed tank of the present invention;

[0045] Figure 6 This is a schematic diagram of the main air inlet supply in the multi-port composite gas valve of the present invention;

[0046] Figure 7 This is a schematic diagram of the auxiliary air inlet supply in the multi-port composite gas valve of the present invention;

[0047] Figure 8 This is a schematic diagram of the installation of the glass tube and burner according to the present invention;

[0048] In the diagram: 10. Tower-type main body; 100. Gas source storage box; 101. Box door; 200. Valve body assembly; 201. Electromagnetic flow valve; 2011. Rotary switch; 202. Igniter; 2021. Gas outlet hose; 2022. Ignition element; 2023. Ignition switch; 203. Burner; 2031. Ceramic platform; 20311. Mesh; 2032. Air pipe; 204. Gas pipe; 205. Multi-port composite gas valve; 2051. Check valve; 205111. Valve body; 205111. Airflow channel; 205111a. Inlet end; 205111b. Outlet end; 205112. Sealing platform; 205113. Side gas groove; 20512. Valve plate; 2051... 21 Airflow hole, 20513 Valve core, 205131 Front end head, 205132 Tubular structure, 205133 Side air hole, 205134 Elastic element, 2052 Split head, 20521 Main air inlet, 20522 Secondary air inlet, 20523 Air outlet, 20524 Main sealing plate, 205241 Extrusion part, 20525 Secondary sealing plate, 205251 Oblong hinge hole, 205252 Hinge shaft, 205253 Elastic strip, 2053 U-tube, 300 Combustion assembly, 301 Glass tube, 3011 Valve, 302 Protective shell, 400 Heat radiation reflector, 20 Gas feed tank, 21 Manual valve. Detailed Implementation

[0049] The present invention will be further described clearly and in detail below with reference to specific embodiments and the accompanying drawings. Those skilled in the art will be able to implement the present invention based on these descriptions. Furthermore, the embodiments of the present invention described below are generally only some, not all, of the embodiments of the present invention. Therefore, all other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention.

[0050] In the description of this invention, it should be understood that the terms "thickness," "upper," "lower," "horizontal," "top," "bottom," "inner," "outer," "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified, and "several" means one or more.

[0051] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0052] Unless otherwise specified, all raw materials used in the embodiments of the present invention are commercially available or obtainable by those skilled in the art; unless otherwise specified, all methods used in the embodiments of the present invention are methods mastered by those skilled in the art.

[0053] Example

[0054] One such Figure 1 and Figure 2 The outdoor gas heater shown specifically includes:

[0055] The gas source storage box 100, valve body assembly 200 and combustion assembly 300 are arranged sequentially from bottom to top, and the three together form a tower-shaped main body 10.

[0056] The gas source storage box 100 is used to store gas raw material tanks 20 such as liquefied gas or natural gas, which are ignited by the valve body assembly 200 and burned in the combustion assembly 300;

[0057] Specifically,

[0058] The gas source storage box 100 has a box-type structure and is equipped with an openable box door 101, which is used to protect the gas raw material tank 20 inside and facilitate the replacement of the gas raw material tank 20.

[0059] The valve body assembly 200, as shown Figure 3As shown, it is an embedded box structure embedded in the tower body 10. Its front is located on the surface of the tower body 10, and it is equipped with an electromagnetic flow valve 201, a multi-way composite gas valve 205, an igniter 202 and a burner 203.

[0060] The electromagnetic flow valve 201 has a corresponding rotary switch 2011 on the front of the valve body assembly 200. The rotary switch 2011 is used to control the flow of the electromagnetic flow valve 201. The electromagnetic flow valve 201 is connected to the multi-port composite gas valve 205 and the igniter 202 through the gas pipe 204.

[0061] The multi-port composite gas valve 205 is as follows Figure 4 As shown, it mainly consists of two parts: a one-way valve 2051 and a split sleeve 2052.

[0062] The one-way valve 2051 is as follows Figure 4 The valve includes a valve body 20511, a valve core 20513, and a valve plate 20512. The valve body 20511 has an airflow channel 205111, with an inlet end 205111a and an outlet end 205111b at its two ends. The valve plate 20512 is located in the airflow channel 205111 near the outlet end 205111b, and is side-sealed and embedded in the side wall of the airflow channel 205111. It has [details omitted]. Airflow hole 205121, the valve core 20513 is disposed in the airflow channel 205111 on the side of the valve plate 20512 facing the air inlet end 205111a, and an annular sealing platform 205112 with a through hole is provided on the side wall of the airflow channel 205111 on the side of the valve core 20513 facing the air inlet end 205111a. The sealing platform 205112 limits the valve core 20513 so that it cannot be dislodged from the air inlet end 205111a;

[0063] The front end 205131 of the valve core 20513 has a conical or frustum-shaped structure and faces the through hole of the sealing platform 205112. When it abuts against the sealing platform 205112, it seals the airflow passage 205111.

[0064] The rear end of the valve core 20513 is a tubular structure 205132, which is in sealed contact with the side wall of the airflow channel 205111. The front end 205131 facing the outlet end 205111b is fixed to the valve plate 20512 through an elastic element 205134. Specifically, in this embodiment, the elastic element 205134 is a spring. The elastic element 205134 provides elastic force so that the front end 205131 of the valve core 20513 abuts against the sealing platform 205112 to seal the airflow channel 205111. The side wall of the tubular structure 205132 is provided with a side air hole 205133. Within the movable range of the side air hole 205133 driven by the movement of the valve core 20513, the side wall of the airflow channel 205111 is provided with a side air groove 205113.

[0065] When no external force is applied, the elastic force generated by the elastic element 205134 causes the valve core 20513 to press against the sealing platform 205112 to seal the airflow channel 205111. After air enters the outlet end 205111b, it cannot flow out from the inlet end 205111a, preventing gas backflow. When the air pressure at the inlet end 205111a is greater than the air pressure at the outlet end 205111b, the gas pushes the valve core 20513 towards the outlet end 205111b, causing the through hole of the sealing platform 205112 to open. The gas passes through the through hole of the sealing platform 205112, the side air groove 205113, and the side air hole 205133 in sequence into the tubular structure 205132 of the valve core 20513, and then through the airflow hole 205121 and is released from the outlet end 205111b to achieve unidirectional gas delivery.

[0066] The split head 2052 is also like Figure 4 As shown, its cross-section has a U-shaped structure, with a main air inlet 20521, a secondary air inlet 20522, and an air outlet 20523 that are interconnected. The air outlet 20523 is located at the bottom of the U-shaped structure and connects to the air inlet end 205111a of the airflow passage 205111 connected to the one-way valve 2051. The main air inlet 20521 and the secondary air inlet 20522 are respectively located at both ends of the U-shaped opening, and the two are separated by a mounting platform. The sleeve head 2052 has a main sealing plate 20524 and a secondary sealing plate 20525 respectively corresponding to the main air inlet 20521 and the secondary air inlet 20522. 22. Sealing and opening are controlled. The main sealing plate 20524 and the secondary sealing plate 20525 are arranged side-by-side. One end of the main sealing plate 20524 is elastically hinged to the top of the mounting platform. In its reset state, it closes the main air inlet 20521. When opened by force, it generates an elastic force that, once the external force disappears, causes the main sealing plate 20524 to reset and seal the main air inlet 20521. Furthermore, the hinged end has a pushing part 205241 eccentrically positioned with respect to the hinge axis. The thickness of the pushing part 205241 is greater than the thickness of the main sealing plate 20524, and its geometric center is located at... Figure 4 The distance between the geometric center of the extrusion part 205241 and the air outlet 20523 in the actual component is higher than that between the axis of the hinge and the air outlet 20523. With the setting of the extrusion part 205241, when the main sealing plate 20524 is flipped up towards the air outlet 20523 and the main air inlet 20521 is open, the extrusion part 205241 will laterally extrude the secondary sealing plate 20525.

[0067] One end of the sub-sealing plate 20525 is hinged to the inner wall of the sub-sleeve head 2052, and the inner wall of the sub-sleeve head 2052 is provided with a push groove at the hinge point. The other end abuts against the hinge end of the main sealing plate 20524 without external force.

[0068] The sub-sealing plate 20525 is provided with a unique elongated oval hinge hole 205251, through which a hinge shaft 205252 and an elastic strip 205253 are inserted. The elastic strip 205253 is made of a flexible material such as TPU. The elastic strip 205253 and the hinge shaft 205252 are arranged side by side, and the elastic strip 205253 is located in the hinge hole near one end of the main sealing plate 20524. When the main sealing plate 20524 is flipped up, the pushing part 205241 pushes the sub-sealing plate 20525 and the elastic strip 205253 to be compressed, and one end of the sub-sealing plate 20525 is pushed into the pushing groove, which restricts it from flipping up.

[0069] Through the above structural arrangement, the heater of the present invention can adopt a two-tank parallel arrangement of gas raw material tanks 20, increasing capacity and effectively avoiding problems such as gas outages, flameouts, and temperature drops. Specifically, as shown in... Figure 5 As shown, the two gas feedstock tanks 20 are connected to the main air inlet 20521 and the auxiliary air inlet 20522, respectively. After opening the manual valve 21 on the gas feedstock tank 20, the gas from both tanks is directed to the electromagnetic flow valve 201. The electromagnetic flow valve 201 is a parallel dual-channel electromagnetic flow valve 201, model OMEGA-FLO, which can simultaneously and equally control the gas flow in both channels. After controlling the flow through the rotary switch 2011, the gas is directed to the main air inlet 20521 and the auxiliary air inlet 20522 of the distributor head 2052, respectively. At this time, as shown... Figure 6 As shown, the main sealing plate 20524 corresponding to the main air inlet 20521 only needs to rotate slightly to push the auxiliary sealing plate 20525 to move horizontally. The rotation of the auxiliary sealing plate 20525 is restricted by the push groove, so that the main air inlet 20521 is open and the auxiliary air inlet 20522 is closed. At this time, the fuel gas pushes open the valve core 20513 of the one-way valve 2051 and flows to the igniter 202 for gas supply and combustion. When the gas in the fuel tank 20 connected to the main air inlet 20521 is exhausted, the one-way valve 2051 closes, the main sealing plate 20524 resets to close the main air inlet 20521, and the auxiliary sealing plate 20525 resets under the action of the elastic strip 205253, contacting the push groove to restrict the rotation of the auxiliary sealing plate 20525. And because the gas pressure at the auxiliary air inlet 20522 is relatively large, such as Figure 7 The auxiliary sealing plate 20525 will be pushed open to supplement gas supply, achieving seamless switching and continuous gas supply. At the same time, the increased gas pressure during gas supply will press the main sealing plate 20524. At this time, the gas raw material tank 20 connected to the main gas inlet 20521 can be replaced. After replacement, the control solenoid valve will cut off the flow for 1 to 2 seconds, which will reset the auxiliary sealing plate 20525 to close the auxiliary gas inlet 20522. Then, the solenoid valve can be opened again to supply gas to the main gas inlet 20521.

[0070] This enables the main air inlet 20521 to serve as a continuous air supply port, with the gas raw material tank 20 connected to it serving as the main fuel tank for gas supply, and the auxiliary air inlet 20522 to serve as an intermittent supplementary air supply port, with the gas raw material tank 20 connected to it serving as a feeder tank.

[0071] During operation, the main fuel tank continuously supplies gas until it is depleted, at which point the connecting tank takes over and supplies gas. At this time, the gas source storage box 100 can be opened to safely replace the main fuel tank. After replacement, the electromagnetic flow valve 201 is briefly controlled to cut off the flow for a few seconds and then reopened, thus switching back to continuous gas supply from the main fuel tank. After a certain number of uses, the connecting tank can be replaced when the main fuel tank is supplying gas and can be used as a substitute for the main fuel tank to ensure stable continuous gas supply. Compared with conventional series gas supply, it only increases the capacity but cannot achieve seamless gas supply and gas source replacement. Existing heaters require a long time to replace the gas source, which may take 3 to 10 minutes, or even more than 10 minutes when there are many series tanks. During this period, a large amount of heat from the surrounding environment is easily lost, causing the temperature to drop and requiring reheating. However, the heater of this invention can safely achieve simultaneous gas exchange during the heating process, resulting in excellent performance.

[0072] In addition, it is convenient to observe the remaining amount of the main fuel tank by the flame height during use. When the flame height gradually decreases and then rises again, it indicates that the main fuel tank has been used up and the gas supply has been taken over by the connecting tank. Usually, after three to five connections, the connecting tank can be used as the main fuel tank for the next replacement to avoid the gas supply to the connecting tank and the main fuel tank being cut off at the same time.

[0073] The igniter 202 is provided with a gas outlet hose 2021 and an ignition element 2022. The ignition element 2022 can be a conventional structure such as a spark plug. In this embodiment, an electric spark plug is used. An ignition switch 2023 is provided corresponding to the ignition element 2022. The ignition switch 2023 controls the ignition element 2022. In this embodiment, an electromagnetic ignition switch 2023 is used. The ignition element 2022 is arranged adjacent to the gas outlet hose 2021. After the combustion gas is discharged from the gas outlet hose 2021, it is ignited by an electric spark generated by the ignition element 2022.

[0074] The burner 203 is the main combustion part, consisting of an air pipe 2032 and a ceramic platform 2031. The ceramic platform 2031 is hollow and has several mesh holes 20311 on the top. Its inner cavity extends to the outside of the tower body 10 through the air pipe 2032 and connects to the external environment, so that the oxygen required for combustion can be supplied by the outside air.

[0075] After the fuel gas passes through the electromagnetic flow valve 201 and the multi-way composite gas valve 205 in sequence and enters the gas outlet hose 2021 of the igniter 202, it exits from the gas outlet hose 2021 and mixes with the fresh air introduced by the burner 203 before being ignited by the ignition element 2022 to form combustion.

[0076] The combustion assembly 300 is disposed directly above the valve body assembly 200, and includes a glass tube 301 fixedly disposed to limit the combustion range, such as... Figure 8 The lower end of the glass tube 301 shown is covered and sealed directly above the burner 203. The bottom end of the glass tube 301 facing the igniter 202 is provided with a valve 3011 for supplying combustion gas into the glass tube 301. The glass tube 301 is used to limit the overall combustion within a certain range, ensuring the safety of combustion and preventing the flame from burning the user or causing damage to the internal structure.

[0077] The combustion assembly 300 also includes a protective shell 302, which covers the outside of the glass tube 301 to cover and protect the glass tube 301 and prevent physical damage to the glass tube 301.

[0078] Specifically, the anti-slip outer shell adopts a metal grid-type shell, which can ensure that the flame landscape generated by the glass tube 301 is not blocked, and at the same time has the characteristic of rapid heating. After heating, it can also radiate heat to the outside, thus avoiding heat waste. The grid-type structure also reduces the loss of direct infrared or far-infrared heat radiation caused by obstruction.

[0079] With the above-mentioned structural combination, the outdoor gas heater of the present invention has a good and safe combustion environment, can effectively control the size of the combustion flame to control the temperature and heating range, and effectively avoids the influence of the outdoor environment on the combustion process. At the same time, it isolates the flame and conducts heat radiation heat transfer through the glass tube 301, making it less likely to generate overflowing sparks and other safety hazards, and also has a certain degree of aesthetic appeal.

[0080] Furthermore,

[0081] The combustion assembly 300 is provided with a heat radiation reflector 400 at its top, which is suspended and fixed directly above the glass tube 301 by a support pole.

[0082] The heat radiation reflector 400 has an inverted bowl-shaped or dish-shaped structure. In this embodiment, an inverted dish-shaped structure is used, and its lower surface is coated with heat-reflective paint to form a heat-reflective layer. In this embodiment, commercially available ZS-222 heat-reflective paint is used. Since a large amount of heat generated by the glass tube 301 will be directly emitted upward with the hot air, and some heat radiation will also be emitted upward, if it is not effectively utilized, a lot of energy will be reduced.

[0083] The heat radiation reflector panel 400, coated with heat-reflective paint, can first reflect upward heat radiation far-infrared light. In addition, after absorbing heat, it will also generate active far-infrared heat radiation outward. Combined with the unique bowl-shaped and saucer-shaped structure, it can effectively improve the heating effect around the heater and greatly improve energy utilization.

[0084] In addition, to ensure that the main air inlet 20521 can be given priority for air supply, a U-shaped pipe 2053 can be fixedly installed at the secondary air inlet 20522.

Claims

1. An outdoor gas heater, characterized in that, include: The gas source storage box, valve body assembly, and combustion assembly are arranged sequentially from bottom to top, forming a tower-shaped main body. The gas source storage box is a box-type structure that can store multiple gas raw material tanks. The valve body assembly is embedded in the tower body, with its front side located on the surface of the tower body. Inside, there is an electromagnetic flow valve, a multi-way composite gas valve, an igniter, and a burner. The electromagnetic flow valve is used to control the flow rate of the gas raw material tank. The multi-way composite gas valve controls that only one of the gas raw material tanks can supply gas in one direction and guide it to the igniter. The igniter is used to ignite the gas, which then burns on the burner. The combustion assembly is located directly above the valve body assembly and includes a glass tube fixedly installed to limit the combustion range. The lower end of the glass tube covers and seals the burner directly above it, and a valve is provided on the side of its bottom end facing the igniter to supply combustion gas into the glass tube. The electromagnetic flow valve is equipped with a corresponding rotary switch; The multi-way composite gas valve includes a one-way valve and a split sleeve; The split head is provided with a main air inlet, a secondary air inlet and an air outlet that are interconnected, and the air outlet is connected to the air inlet end of a one-way valve; The main air inlet is used for continuous air supply, and the auxiliary air inlet is used for intermittent air supply. The split head has a U-shaped cross-section and is provided with a main air inlet, a secondary air inlet and an air outlet that are interconnected. The main air inlet and the secondary air inlet are respectively located at the two ends of the U-shaped opening and are separated by a mounting platform. The main sealing plate and the auxiliary sealing plate are arranged side by side. One end of the main sealing plate is hinged to the top of the mounting platform to seal the main air inlet, and the other end is a hinge end. The hinge end is provided with a pushing part that is eccentrically set with the hinge shaft. The thickness of the pushing part is greater than the thickness of the main sealing plate, and the vertical distance between its geometric center and the air outlet is less than the vertical distance between the hinge shaft center and the air outlet. One end of the sub-sealing plate is hinged to the inner wall of the sleeve head. The inner wall of the sleeve head at the hinge is provided with a push groove. The other end of the sub-sealing plate abuts against the hinge end of the main sealing plate. The hinge hole used for the hinge of the sub-sealing plate is an oblong hinge hole, in which a hinge shaft and an elastic strip are inserted. The elastic strip and the hinge shaft are arranged side by side, and the elastic strip is located in the hinge hole at one end near the main sealing plate.

2. An outdoor gas heater according to claim 1, characterized in that, The gas source storage box is equipped with an openable and closable door.

3. An outdoor gas heater according to claim 1, characterized in that, The combustion assembly also includes a protective housing that covers the outside of the glass tube.

4. An outdoor gas heater according to claim 1, characterized in that, The multi-port composite gas valve is a three-way check valve with two inlets and one outlet. The air outlet is connected to the igniter; The air inlets are connected to two gas feedstock tanks respectively.

5. An outdoor gas heater according to claim 4, characterized in that, Each of the two air inlets is equipped with a rotary switch.

6. An outdoor gas heater according to claim 1, characterized in that, The combustion assembly is equipped with a heat radiation reflector at its top, which is suspended and fixed directly above the glass tube by a support pole.

7. An outdoor gas heater according to claim 6, characterized in that, The heat radiation reflector has an inverted bowl or dish-shaped structure, and its lower surface is coated with a heat-reflective coating to form a heat-reflective layer.

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