A natural gas air heater for vehicle and a vehicle

Abstract

The present invention discloses a vehicle-use natural gas air heater and a vehicle, wherein a natural gas inlet and a combustion-supporting air inlet are formed on the combustion chamber; one end of the combustion-supporting air pipe is connected to the combustion chamber, and the other end extends to the outside to form a first air inlet; the natural gas delivery assembly includes a natural gas delivery pipe assembly and a valve body assembly, the valve body assembly is arranged on the natural gas delivery pipe and is used to open or close the natural gas delivery pipe assembly, the natural gas delivery pipe assembly includes a main delivery pipe and two auxiliary delivery pipes, one end of the main delivery pipe is connected to the gas storage tank, and the other end is connected to the two auxiliary delivery pipes, the valve body assembly includes a first control valve, a second control valve, and a third control valve, the first control valve is arranged on the main delivery pipe, and the second control valve and the third control valve are respectively arranged on the two auxiliary delivery pipes. The present invention aims to solve the problem that existing vehicles need to be equipped with an additional fuel supply system, which makes the system complex, costly, and inconvenient to use.

Description

Technical Field

[0001] The present invention relates to the field of automobile technology, in particular to the field of automobile heating technology, and specifically to a natural gas air heater for a vehicle and a vehicle. Background Art

[0002] Car heaters are important devices for heating train cabs or passenger car cabins, and are widely used in car heating systems. With the continuous improvement of people's living standards, the requirements for the comfort of transportation are also getting higher and higher. Therefore, heating equipment has become an essential configuration for car compartments. At present, the air heaters on the market all burn gasoline or diesel to release heat for heating. They are mainly composed of a blower motor, a large fan, a combustion-supporting fan, a mixing chamber, a combustion chamber, a radiator, a shell, a controller, an oil pipeline, etc. The current air heaters have the advantage of good heating effect, but because the fuel is fuel oil, it will cause pollution to the environment to a certain extent. At the same time, these heaters only support diesel or gasoline combustion and heat release, and do not support natural gas combustion and heat release. If a fuel air heater is used for heating on an LNG or CNG car, an additional fuel supply system is required, which makes the system complex, costly, and inconvenient to use. Summary of the Invention

[0003] The main purpose of the present invention is to provide a natural gas air heater for a vehicle and a vehicle, aiming to solve the problem that existing vehicles need to be equipped with an additional fuel supply system, which causes the system to be complex, costly and inconvenient to use.

[0004] To achieve the above-mentioned purpose, the present invention proposes a vehicle-use natural gas air heater, comprising:

[0005] case;

[0006] A combustion chamber is provided in the shell, and a natural gas inlet and a combustion air inlet are formed on the combustion chamber;

[0007] A combustion air delivery pipe, one end of which is connected to the combustion chamber and the other end of which extends to the outside to form a first air inlet; and

[0008] A natural gas gas delivery assembly is arranged in the shell, and the natural gas gas delivery assembly includes a natural gas gas delivery pipe assembly and a valve body assembly. The valve body assembly is arranged on the natural gas gas delivery pipe and is used to open or close the natural gas gas delivery pipe assembly. The natural gas gas delivery pipe assembly includes a main gas delivery pipe and two auxiliary gas delivery pipes. One end of the main gas delivery pipe is connected to the gas storage tank, and the other end is connected to the two auxiliary gas delivery pipes. The valve body assembly includes a first control valve, a second control valve and a third control valve. The first control valve is arranged on the main gas delivery pipe, and the second control valve and the third control valve are respectively arranged on the two auxiliary gas delivery pipes.

[0009] Optionally, the vehicle natural gas air heater further comprises a mixing chamber, on which a first air outlet and a second air inlet are formed; the first air outlet is connected to the natural gas inlet on the combustion chamber, and the second air inlet is connected to the combustion air supply pipe;

[0010] Two third air inlets are formed on the side wall of the combustion air supply pipe, and the two third air inlets are connected to the two auxiliary air supply pipes.

[0011] Optionally, the mixing chamber includes a guide chamber and a mixing chamber, the guide chamber is connected to the mixing chamber, and the guide chamber is arranged around the mixing chamber, the guide chamber is connected to the combustion air delivery pipe, and the mixing chamber is connected to the combustion chamber;

[0012] Wherein, the natural gas inlet is formed on the mixing chamber, and the combustion air inlet is formed on the guide chamber.

[0013] Optionally, the vehicle natural gas air heater further includes a combustion-supporting fan, which is arranged in the combustion-supporting air supply pipe, and the air outlet of the combustion-supporting fan is arranged opposite to the second air inlet.

[0014] Optionally, the two auxiliary gas pipes include a first auxiliary gas pipe and a second auxiliary gas pipe, the second control valve is provided on the first auxiliary gas pipe, and the third control valve is provided on the second auxiliary gas pipe, wherein:

[0015] The diameter of the first auxiliary gas pipeline is smaller than the diameter of the second auxiliary gas pipeline.

[0016] Optionally, when the first control valve, the second control valve and the third control valve are all closed, the vehicle natural gas air heater stops working; and / or,

[0017] The first control valve and the second control valve are opened, the third control valve is closed, and the vehicle natural gas air heater is heated at a low speed; and / or,

[0018] The first control valve and the third control valve are opened, the second control valve is closed, and the vehicle natural gas air heater is heated at a medium speed; and / or,

[0019] The first control valve, the second control valve and the third control valve are all opened, and the vehicle natural gas air heater is heated at a high speed.

[0020] Optionally, the vehicle natural gas air heater further includes a radiator, the radiator cover is arranged on the outside of the combustion chamber, and a plurality of heat dissipation fins arranged at intervals are formed on the radiator.

[0021] Optionally, an air inlet and an air outlet are formed on the shell, and the combustion chamber shell is arranged in a position close to the air outlet;

[0022] The vehicle-use natural gas air heater further comprises a large fan, which is arranged in the housing near the air inlet for introducing outside air.

[0023] Optionally, the vehicle natural gas air heater further includes a first one-way valve, which is provided at the first air inlet of the combustion air pipeline; and / or,

[0024] An exhaust gas outlet is formed on the combustion chamber, and a second one-way valve is provided on the exhaust gas outlet.

[0025] In addition, the present invention also provides an automobile, including the above-mentioned vehicle-use natural gas air heater, wherein the vehicle-use natural gas air heater includes:

[0026] case;

[0027] A combustion chamber is provided in the shell, and a natural gas inlet and a combustion air inlet are formed on the combustion chamber;

[0028] One end of the combustion air delivery pipe is connected to the combustion chamber, and the other end extends to the outside to form a first air inlet; and

[0029] A natural gas gas delivery assembly is arranged in the shell, and the natural gas gas delivery assembly includes a natural gas gas delivery pipe assembly and a valve body assembly. The valve body assembly is arranged on the natural gas gas delivery pipe and is used to open or close the natural gas gas delivery pipe assembly. The natural gas gas delivery pipe assembly includes a main gas delivery pipe and two auxiliary gas delivery pipes. One end of the main gas delivery pipe is connected to the gas storage tank, and the other end is connected to the two auxiliary gas delivery pipes. The valve body assembly includes a first control valve, a second control valve and a third control valve. The first control valve is arranged on the main gas delivery pipe, and the second control valve and the third control valve are respectively arranged on the two auxiliary gas delivery pipes.

[0030] In the technical solution of the present invention, the vehicle natural gas air heater can directly take gas from the gas storage image at the vehicle engine. Compared with the independent fuel heater, there is no need to install a fuel tank, the system is simpler and the system weight is lower; at the same time, as long as the vehicle engine uses natural gas, the vehicle natural gas air heater can be used without special fuel filling; furthermore, gasoline or diesel is easy to wax at low temperatures, affecting its use, while natural gas still remains in a gaseous state at low temperatures, thereby ensuring the normal use of the vehicle natural gas air heater at low temperatures, and having better low-temperature reliability, realizing the combustion release of natural gas as fuel, and the combustion emissions are more environmentally friendly than fuel heaters. At the same time, since there is no need to set up an additional fuel supply system, the manufacturing cost is reduced and the use is more convenient; the combustion process of the vehicle natural gas air heater is safe and reliable, and through the first control valve, the The cooperation of the second control valve and the third control valve makes it possible to prevent natural gas from leaking, and safety is guaranteed. At the same time, since the fuel is a commonly used combustible gas and excessive combustion air is supplied through the combustion air pipe during the combustion process, the combustion is absolutely complete, so there is no malfunction problem caused by carbon deposition and poor fuel atomization. Since it burns fully, the generation of harmful gases is greatly reduced, and the pollution to the air is also reduced accordingly; and the connection between the main gas pipe and the two auxiliary gas pipes is simple and clear, and maintenance is simpler and more convenient; specifically, in the actual heating process, the first control valve, the second control valve and the third control valve are opened at the same time to transport natural gas, and at the same time the combustion air pipe inputs combustion air, and the natural gas is mixed with the combustion air and enters the combustion chamber at the same time, and burns and releases heat in the combustion chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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 the structures shown in these drawings without paying any creative work.

[0032] Figure 1 A schematic structural diagram of an embodiment of a natural gas air heater for a vehicle provided by the present invention;

[0033] Figure 2 for Figure 1 Side view of;

[0034] Figure 3 for Figure 2 Middle BB cross-section view.

[0035] Description of Figure Numbers:

[0036]

[0037]

[0038] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0039] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0040] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0041] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0042] Car heaters are important devices for heating train cabs or passenger car cabins, and are widely used in car heating systems. With the continuous improvement of people's living standards, the requirements for the comfort of transportation are also getting higher and higher. Therefore, heating equipment has become an essential configuration for car compartments. At present, the air heaters on the market all burn gasoline or diesel to release heat for heating. They are mainly composed of a blower motor, a large fan, a combustion-supporting fan, a mixing chamber, a combustion chamber, a radiator, a shell, a controller, an oil pipeline, etc. The current air heaters have the advantage of good heating effect, but because the fuel is fuel oil, it will cause pollution to the environment to a certain extent. At the same time, these heaters only support diesel or gasoline combustion and heat release, and do not support natural gas combustion and heat release. If a fuel air heater is used for heating on an LNG or CNG car, an additional fuel supply system is required, which makes the system complex, costly, and inconvenient to use.

[0043] In view of this, the present invention provides a vehicle-use natural gas air heater. Figures 1 to 3 This is an embodiment of a natural gas air heater for a vehicle provided by the present invention. This vehicle air heater utilizes natural gas as fuel to generate heat, resulting in more environmentally friendly combustion emissions compared to fuel-fired heaters. The following describes the natural gas air heater with reference to the accompanying figures.

[0044] See also Figure 1 and Figure 2 The vehicle natural gas air heater 100 includes a shell 1, a combustion chamber 2, a combustion air pipe 3 and a natural gas component; the combustion chamber 2 is arranged in the shell 1, and a natural gas inlet 21 and a combustion air inlet 22 are formed on the combustion chamber 2; one end of the combustion air pipe 3 is connected to the combustion chamber 2, and the other end extends to the outside of the shell 1 to form a first air inlet 31; the natural gas delivery component 4 is arranged in the shell 1, and the natural gas delivery component 4 includes a natural gas delivery pipe component 41 and a valve body component 42, and the valve body component 42 is arranged in the natural gas delivery pipe 2. On the gas pipe, it is used to open or close the natural gas gas pipe assembly 41. The natural gas gas pipe assembly 41 includes a main gas pipe 411 and two auxiliary gas pipes 412. One end of the main gas pipe 411 is connected to the gas storage box, and the other end is connected to the two auxiliary gas pipes 412. The valve body assembly 42 includes a first control valve 421, a second control valve 422 and a third control valve 423. The first control valve 421 is arranged on the main gas pipe 411, and the second control valve 422 and the third control valve 423 are respectively arranged on the two auxiliary gas pipes 412.

[0045] In the technical solution of the present invention, the vehicle natural gas air heater 100 can directly take gas from the gas storage image at the vehicle engine for use. Compared with the independent fuel heater, there is no need to install a fuel tank, the system is simpler and the system weight is lower; at the same time, as long as the vehicle engine uses natural gas, the vehicle natural gas air heater 100 can be used without special fuel filling; further, gasoline or diesel is easy to wax at low temperatures, affecting its use, while natural gas still remains in a gaseous state at low temperatures, thereby ensuring the normal use of the vehicle natural gas air heater 100 at low temperatures, and having better low-temperature reliability, realizing combustion heat release with natural gas as fuel, and combustion emissions are more environmentally friendly than fuel heaters. At the same time, since there is no need to set up an additional fuel supply system, the manufacturing cost is reduced and it is more convenient to use; the combustion process of the vehicle natural gas air heater 100 is safe and reliable, through the first control valve 421 and the second control valve The cooperation between 422 and the third control valve 423 makes it possible to prevent natural gas from leaking, and safety is guaranteed. At the same time, since the fuel is a commonly used combustible gas and excessive combustion air is supplied through the combustion air pipe 3 during the combustion process, the combustion is absolutely complete, so there is no malfunction problem caused by carbon deposition and poor fuel atomization. Since it burns fully, the generation of harmful gases is greatly reduced, and the pollution to the air is also reduced accordingly; and the connection between the main gas pipe 411 and the two auxiliary gas pipes 412 is simple and clear, and maintenance is simpler and more convenient; specifically, in the actual heating process, the first control valve 421, the second control valve 422 and the third control valve 423 are opened at the same time to transport natural gas, and at the same time, the combustion air pipe 3 inputs combustion air, and the natural gas is mixed with the combustion air and enters the combustion chamber 2 at the same time, and burns and releases heat in the combustion chamber 2.

[0046] It should be noted that, in one embodiment, the opening and closing of the two auxiliary gas pipes 412 are controlled by controlling the first control valve 421, the second control valve 422 and the third control valve 423. As long as the first control valve 421 is in the closed state, the second control valve 422 and the third control valve 423 are also in the closed state. Since the first control valve 421 is arranged on the main gas pipe 411, when the first control valve 421 is in the closed state, even if the second control valve 422 and the third control valve 423 are in the open state, no natural gas flows to the combustion chamber 2. Similarly, when the first control valve 421 is in the open state, the second control valve 422 and the third control valve 423 are in the closed state, and no natural gas flows to the combustion chamber 2. The first control valve 421, the second control valve 422, and the third control valve 423 play a dual control role to prevent natural gas leakage caused by a failure of one of the valve bodies.

[0047] Furthermore, in this embodiment, the first control valve 421, the second control valve 422 and the third control valve 423 are all solenoid valves. The specific structure and control principle of the solenoid valves can refer to the conventional settings in the field and will not be described here one by one.

[0048] Furthermore, since the cost-effectiveness of the natural gas used in the vehicle air heater 100 is higher than that of gasoline or diesel, under the condition of the same heat release, the cost of using the natural gas used in the vehicle air heater 100 provided by the present invention is about 2 / 5 of that of a fuel heater, which can save users' expenses.

[0049] Please continue reading Figure 1 The vehicle natural gas air heater 100 further includes a mixing chamber 5, on which a first air outlet and a second air inlet are formed, the first air outlet being connected to the natural gas inlet 21 on the combustion chamber 2, the second air inlet being connected to the combustion air supply pipe 3, and two third air inlets being formed on the side wall of the combustion air supply pipe, the two third air inlets being connected to the two auxiliary air supply pipes 412; in this embodiment, the combustion air supply pipe 3 is connected to the second air inlet, and part of the combustion air in the combustion air supply pipe 3 passes through the second air inlet. Entering the mixing chamber 5, at the same time, the natural gas in the two auxiliary gas pipes 412 enters the mixing chamber 5 through the third air inlet, and the natural gas and the combustion air are fully contacted and mixed in the mixing chamber 5. After the mixing is completed, they flow out from the first air outlet and flow into the combustion chamber 2, waiting for combustion and heat release; specifically, the function of the mixing chamber 5 is to allow the natural gas and the combustion air to be fully mixed so that the natural gas can be fully burned. One purpose is to make full use of resources, and the other purpose is to avoid the generation of harmful gases from incomplete combustion of natural gas to pollute the environment.

[0050] Please refer to Figure 3. The combustion chamber 2 includes a guide chamber 23 and a mixing chamber 24. The guide chamber 23 is connected to the mixing chamber 24 and is arranged around the mixing chamber 24. The guide chamber 23 is connected to the combustion air supply pipe 3, and the mixing chamber 24 is connected to the mixing chamber 5. The natural gas inlet 21 is formed on the mixing chamber 24, and the combustion air inlet 22 is formed on the guide chamber 23. In this embodiment, the combustion air enters the mixing chamber 5 through two paths. One is to mix with the natural gas ejected from the auxiliary gas supply pipe 412 through the combustion air supply channel to form a primary mixed gas, which drives the natural gas to flow into the combustion chamber 2. The other is to directly enter the guide chamber 23 and flow directly into the combustion chamber 2 from the gap with guide around the guide chamber 23 and the combustion chamber 2, and fully mix with the primary mixed gas (i.e., natural gas and combustion air) again, and then fully burn. The purpose of such a setting is to ensure that the natural gas can be fully mixed with the combustion-supporting air, to ensure that the natural gas can be fully burned in the combustion chamber 2, to fully utilize resources, and to avoid the generation of toxic gases.

[0051] Furthermore, in order to ensure that the combustion-supporting air can be fully mixed with the natural gas, the vehicle-use natural gas air heater 100 also includes a combustion-supporting fan 6. The combustion-supporting fan 6 is arranged in the combustion-supporting air supply pipe 3, and the air outlet of the combustion-supporting fan 6 is arranged opposite to the second air inlet. Combustion-supporting air is blown in through the combustion-supporting fan 6 to ensure that the natural gas can be fully mixed with the combustion-supporting air.

[0052] Please continue reading Figure 1 and Figure 2 The two auxiliary gas pipes 412 include a first auxiliary gas pipe and a second auxiliary gas pipe. The second control valve 422 is located on the first auxiliary gas pipe, and the third control valve 423 is located on the second auxiliary gas pipe. The diameter of the first auxiliary gas pipe is smaller than that of the second auxiliary gas pipe. This configuration is intended to control the natural gas flow rate. High, medium, and low flow levels are controlled based on the opening and closing of the first control valve 421, the second control valve 422, and the third control valve 423, as well as the diameters of the two auxiliary gas pipes 412.

[0053] Specifically, the control method of the natural gas flow rate is as follows: when the first control valve 421, the second control valve 422 and the third control valve 423 are all closed, the vehicle natural gas air heater 100 stops working; the first control valve 421 and the second control valve 422 are opened, the third control valve 423 is closed, and the vehicle natural gas air heater 100 is heated at a low speed; the first control valve 421 and the third control valve 423 are opened, the second control valve 422 is closed, and the vehicle natural gas air heater 100 is heated at a medium speed; the first control valve 421, the second control valve 422 and the third control valve 423 are all opened, and the vehicle natural gas air heater 100 is heated at a high speed. Specifically, in this embodiment, the vehicle natural gas air heater 100 heats at a low speed, and the heat release power of the vehicle natural gas air heater 100 is the smallest; the vehicle natural gas air heater 100 heats at a medium speed, and the heat release power of the vehicle natural gas air heater 100 is medium; the vehicle natural gas air heater 100 heats at a low speed, and the heat release power of the vehicle natural gas air heater 100 is the largest. The driver in the cab can select different gears for heating according to actual conditions.

[0054] Furthermore, to ensure that heat within the combustion chamber 2 can be quickly transferred to the air, the vehicle natural gas air heater 100 further includes a radiator 7, which is disposed outside the combustion chamber 2 and has a plurality of spaced-apart radiating fins. The radiating fins assist in heat dissipation, rapidly raising the temperature of the air flowing through the combustion chamber, thereby avoiding heat loss and saving energy.

[0055] For further information, please refer to Figure 1 and Figure 2 The housing 1 is formed with an air inlet 11 and an air outlet 12. The combustion chamber 2 is located in the housing 1 near the air outlet 12. The vehicle natural gas air heater 100 further includes a large fan 8, which is located in the housing 1 near the air inlet 11 and is used to draw in outside air. In this embodiment, the large fan 8 blows fresh air (cold air or room temperature air) from the outside into the housing 1. When the fresh air flows through the combustion chamber 2, it absorbs the heat energy emitted by the combustion chamber 2, thereby becoming hot air. The hot air then flows out of the housing 1 through the air outlet 12 and into the cab, thereby warming the environment inside the cab.

[0056] Furthermore, in order to prevent gas backflow, the vehicle natural gas air heater 100 also includes a first one-way valve, which is arranged at the first air inlet 31 of the combustion air supply pipe 3; an exhaust gas outlet 25 is formed on the combustion chamber 2, and a second one-way valve is provided on the exhaust gas outlet 25.

[0057] In addition, the present invention further provides an automobile including the aforementioned natural gas air heater 100. Since the automobile includes the aforementioned natural gas air heater 100, the specific structure of the aforementioned natural gas air heater 100 is similar to that of the aforementioned embodiments. Since the present automobile utilizes all the technical solutions of all the aforementioned embodiments, it at least possesses all the beneficial effects brought about by the technical solutions of the aforementioned embodiments, and therefore will not be further elaborated upon here.

[0058] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention description and drawings under the concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A natural gas air heater for a vehicle, characterized in that: include: case; A combustion chamber is provided in the shell, and a natural gas inlet and a combustion air inlet are formed on the combustion chamber; A combustion air delivery pipe, one end of which is connected to the combustion chamber and the other end of which extends to the outside to form a first air inlet; and A natural gas gas delivery assembly is arranged in the shell, and the natural gas gas delivery assembly includes a natural gas gas delivery pipe assembly and a valve body assembly. The valve body assembly is arranged on the natural gas gas delivery pipe and is used to open or close the natural gas gas delivery pipe assembly. The natural gas gas delivery pipe assembly includes a main gas delivery pipe and two auxiliary gas delivery pipes. One end of the main gas delivery pipe is connected to the gas storage tank, and the other end is connected to the two auxiliary gas delivery pipes. The valve body assembly includes a first control valve, a second control valve and a third control valve. The first control valve is arranged on the main gas delivery pipe, and the second control valve and the third control valve are respectively arranged on the two auxiliary gas delivery pipes.

2. The vehicle-use natural gas air heater according to claim 1, characterized in that: The vehicle natural gas air heater further comprises a mixing chamber, on which a first air outlet and a second air inlet are formed; the first air outlet is connected to the natural gas inlet on the combustion chamber, and the second air inlet is connected to the combustion air supply pipe; Two third air inlets are formed on the side wall of the combustion air supply pipe, and the two third air inlets are connected to the two auxiliary air supply pipes.

3. The vehicle natural gas air heater according to claim 2, characterized in that: The mixing chamber includes a guide chamber and a mixing chamber, the guide chamber is connected to the mixing chamber, and the guide chamber is arranged around the mixing chamber, the guide chamber is connected to the combustion air supply pipe, and the mixing chamber is connected to the combustion chamber; Wherein, the natural gas inlet is formed on the mixing chamber, and the combustion air inlet is formed on the guide chamber.

4. The vehicle natural gas air heater according to claim 2, characterized in that: The vehicle-use natural gas air heater further includes a combustion-supporting fan, which is arranged in the combustion-supporting air supply pipe, and the air outlet of the combustion-supporting fan is arranged directly opposite to the second air inlet.

5. The vehicle natural gas air heater according to claim 1, characterized in that: The two auxiliary gas pipelines include a first auxiliary gas pipeline and a second auxiliary gas pipeline, the second control valve is provided on the first auxiliary gas pipeline, and the third control valve is provided on the second auxiliary gas pipeline, wherein: The diameter of the first auxiliary gas pipeline is smaller than the diameter of the second auxiliary gas pipeline.

6. The natural gas air heater for vehicle according to claim 5, characterized in that: When the first control valve, the second control valve and the third control valve are all closed, the vehicle natural gas air heater stops working; or, The first control valve and the second control valve are opened, the third control valve is closed, and the vehicle natural gas air heater is heated at a low speed; or, The first control valve and the third control valve are opened, the second control valve is closed, and the vehicle natural gas air heater is heated at a medium speed; or, The first control valve, the second control valve and the third control valve are all opened, and the vehicle natural gas air heater is heated at a high speed.

7. The vehicle natural gas air heater according to claim 1, characterized in that: The vehicle natural gas air heater further comprises a radiator. The radiator cover is arranged outside the combustion chamber. The radiator is formed with a plurality of heat dissipation fins arranged at intervals.

8. The natural gas air heater for vehicle according to claim 1, characterized in that: An air inlet and an air outlet are formed on the shell, and the combustion chamber shell is arranged in a position close to the air outlet; The vehicle-use natural gas air heater further comprises a large fan, which is arranged in the housing near the air inlet for introducing outside air.

9. The natural gas air heater for vehicle according to claim 1, characterized in that: The vehicle natural gas air heater further includes a first one-way valve, which is arranged at the first air inlet of the combustion air pipeline; and / or, An exhaust gas outlet is formed on the combustion chamber, and a second one-way valve is provided on the exhaust gas outlet.

10. An automobile, characterized in that: It comprises a natural gas air heater for a vehicle as described in any one of claims 1 to 9.

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