Vehicle-mounted carbon-free fuel mixing proportional valve with preheating function

Abstract

The invention relates to a vehicle-mounted carbon-free fuel mixing proportional valve with a preheating function, and belongs to the technical field of new energy automobile fuel cells. According to the technical key points, the front valve component comprises a front valve body and an ammonia water valve; an upper fluid cavity, a lower fluid cavity and a confluence cavity are formed in the front valve body; the upper fluid cavity and the lower fluid cavity are arranged in parallel up and down; the rear valve component comprises a rear valve body and a main valve; a protruding part is arranged at the left end of the rear valve body, and external threads are arranged on the outer surface of the protruding part. The protruding part of the rear valve body is in threaded connection with the interior of the inserting opening of the front valve body, and the confluence cavity is correspondingly communicated with the flowing hole channel. By adopting the scheme provided by the invention, the hydrogen fuel cell can be started more quickly in a low-temperature environment, and the cold start time is shortened.

Description

Technical Field

[0001] This patent application relates to the technical field of new energy vehicle fuel cells, and in particular to a vehicle-mounted carbon-free fuel mixing proportioning valve with a preheating function. Background Art

[0002] With the increasing global attention to reducing greenhouse gas emissions and improving air quality, the automotive industry is facing pressure to transform to more environmentally friendly energy solutions. Against this backdrop, carbon-free fuel technology has emerged to provide a clean and sustainable energy alternative. Carbon-free fuel, as the name suggests, refers to fuel that produces no or very little greenhouse gases such as carbon dioxide during combustion. Such fuels usually include hydrogen, methanol, biofuels, etc., and the main byproduct they produce during combustion is water vapor, which greatly reduces the impact on the environment.

[0003] In order to ensure that carbon-free fuel can be used efficiently and safely in vehicles, a device that can accurately control the fuel-air mixture ratio, namely the mixture ratio valve, is required. According to the working status and needs of the engine, the fuel supply is automatically adjusted to achieve optimal combustion efficiency and emission control.

[0004] Preheating is a critical step in some carbon-free fuel systems. For example, in hydrogen fuel cell vehicles, preheating can improve the startup speed and efficiency of the fuel cell while reducing energy losses during cold starts. The preheating function ensures that the engine can run quickly and stably under various environmental conditions by preheating the fuel or air.

[0005] Integrating the preheating function into the on-board carbon-free fuel mixing ratio valve can further improve the performance and environmental friendliness of the vehicle. This integrated valve can not only adjust the fuel supply according to real-time data, but also preheat the fuel or air in a low-temperature environment to optimize the start and operation of the engine. With the advancement of technology and the strengthening of environmental protection regulations, the on-board carbon-free fuel mixing ratio valve with preheating function is expected to become an important part of the future automotive power system, providing technical support for the realization of clean, efficient and sustainable transportation.

[0006] However, the prior art has not yet provided an implementation scheme for integrating the preheating function into an on-board carbon-free fuel mixing proportioning valve. Summary of the invention

[0007] The purpose of the present application is to provide a vehicle-mounted carbon-free fuel mixing proportioning valve with a preheating function in view of the above-mentioned deficiencies in the prior art.

[0008] A vehicle-mounted carbon-free fuel mixing proportion valve with a preheating function, comprising: a front valve component and a rear valve component;

[0009] Wherein, the front valve component comprises: a front valve body and an ammonia valve; the interior of the front valve body is provided with an upper fluid cavity, a lower fluid cavity and a confluence cavity; the upper fluid cavity and the lower fluid cavity are arranged in parallel up and down; the upper fluid cavity and the lower fluid cavity are both connected with the confluence cavity; the upper fluid cavity is used to pass ammonia, and the lower fluid cavity is used to pass hydrogen; the ammonia valve is used to control whether the upper fluid cavity is connected with the confluence cavity; the right end of the front valve body is provided with a socket, and the inner surface of the socket is provided with an internal thread;

[0010] Among them, the rear valve component includes: a rear valve body and a main valve; a protrusion is provided at the left end of the rear valve body, and the outer surface of the protrusion is provided with an external thread, and the protrusion of the rear valve body is threadedly connected to the inside of the socket of the front valve body; the protrusion is divided into three layers from the inside to the outside: a brass heat-conducting sleeve, a heating wire, and an external valve body; the heating wire is wound around the outer wall of the brass heat-conducting sleeve; a flow channel is provided inside the rear valve body, and the main valve is used to control whether the flow channel is connected or not.

[0011] Wherein, the matching relationship between the front valve component and the rear valve component is: the confluence cavity is correspondingly connected to the flow channel.

[0012] Furthermore, from left to right, the flow channels are divided into a first horizontal flow channel, a first inclined flow channel, a vertical flow channel, a second horizontal flow channel, and a second inclined flow channel.

[0013] Furthermore, the confluence cavity is correspondingly connected to the first horizontal flow channel.

[0014] Furthermore, a socket is provided at the right end of the rear valve body, and an inner surface of the socket is provided with an internal thread for connection with a vehicle pipeline.

[0015] Furthermore, a vertical small hole is provided on the external valve body, and the vertical small hole is used for the heating wire to lead out the electric wire and connect it to the external power supply.

[0016] Furthermore, a flange is provided on the left side of the external valve body.

[0017] Furthermore, the diameter of the pipe of the upper fluid chamber is 10 mm, and the diameter of the pipe of the lower fluid chamber is 15 mm.

[0018] Furthermore, the inclination angle of the first inclined flow channel is 18°, and the inclination angle of the second inclined flow channel is 25°.

[0019] Compared with the prior art, the above technical solution has the following advantages:

[0020] First, the basic solution of the present application: before the hydrogen and oxygen react, the present application premixes the hydrogen and ammonia water and preheats them through a resistance wire to generate a carbon-free fuel, thereby increasing the working efficiency of the fuel cell; at the same time, preheating also has the following effects:

[0021] (1) It can enable hydrogen fuel cells to start faster in low temperature environments and reduce cold start time;

[0022] (2) Preheating hydrogen can increase the diffusion rate of hydrogen in the battery, thereby improving the working efficiency and output power of the battery;

[0023] (3) Preheating can reduce the energy consumption required for the battery to reach the optimal operating temperature during startup and operation;

[0024] (4) Under low temperature conditions, the viscosity of hydrogen increases and the diffusion rate decreases. Preheating helps to improve these conditions so that the battery can work normally in a low temperature environment.

[0025] Second, the overall structure of the valve body of the present application is compact, and the flow and mixing ratio of the carbon-free fuel at the outlet are accurately regulated through the ammonia valve (rotation operation) and the main valve (up and down operation), achieving miniaturization and lightness compared to traditional mixing ratio valves. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present application is further described in detail below in conjunction with the embodiments in the accompanying drawings, but does not constitute any limitation to the present application.

[0027] Figure 1 It is a schematic diagram of the three-dimensional structural design of the vehicle-mounted carbon-free fuel mixing proportioning valve of Example 1.

[0028] Figure 2 It is a schematic diagram of the internal structure of the vehicle-mounted carbon-free fuel mixing proportioning valve of Example 1.

[0029] Figure 3 It is a front view of the vehicle-mounted carbon-free fuel mixing proportion valve of Example 1.

[0030] Figure 4 yes Figure 3 AA cross-section diagram.

[0031] Figure 5 It is the heating power rising curve.

[0032] Figure 6 It is the inlet and outlet gas temperature change curve.

[0033] Figure 7 It is the average temperature variation curve of the heater.

[0034] Figure 8This is the temperature distribution diagram of the heater and mixing chamber when the heating power is 400w.

[0035] Fig. 9 This is the temperature distribution diagram of the heater and mixing chamber when the heating power is 600w.

[0036] Fig.10 This is the temperature distribution diagram of the heater and mixing chamber when the heating power is 800w.

[0037] Fig.11 This is the temperature distribution diagram of the heater and mixing chamber when the heating power is 1000w.

[0038] Fig.12 This is the temperature distribution diagram of the heater and mixing chamber when the heating power is 1200w.

[0039] Fig.13 This is the hydrogen inlet flow curve.

[0040] Fig.14 is the average temperature curve of the heater.

[0041] Fig.15 This is the inlet pressure rise curve.

[0042] Fig.16 This is the temperature distribution diagram of the heater and mixing chamber when the hydrogen flow rate is 2.5 g / s.

[0043] Fig.17 This is the temperature distribution diagram of the heater and mixing chamber when the hydrogen flow rate is 5 g / s.

[0044] Fig.18 This is the temperature distribution diagram of the heater and mixing chamber when the hydrogen flow rate is 7.5 g / s.

[0045] Fig.19 This is the temperature distribution diagram of the heater and mixing chamber when the hydrogen flow rate is 10.5 g / s.

[0046] Fig. 20 This is the temperature distribution diagram of the heater and mixing chamber when the hydrogen flow rate is 12.5 g / s.

[0047] The following are the descriptions of the reference numerals:

[0048] Front valve component 100, front valve body 101, upper fluid chamber 102, lower fluid chamber 103, confluence chamber 104, ammonia valve 105;

[0049] Rear valve component 200, rear valve body 201, brass heat-conducting sleeve 202, heating wire 203, external valve body 204, vertical small hole 205, main valve 206, flow channel 207, first horizontal flow channel 2071, first inclined flow channel 2072, vertical flow channel 2073, second horizontal flow channel 2074, second inclined flow channel 2075. DETAILED DESCRIPTION

[0050] In the following description, a large number of specific details are provided to provide a more thorough understanding of the present application. However, it is apparent to those skilled in the art that the present application can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present application, some technical features well known in the art are not described.

[0051] In order to thoroughly understand the present application, a detailed description will be provided in the following description. Obviously, the implementation of the embodiments of the present application is not limited to the specific details familiar to those skilled in the art. The preferred embodiments of the present application are described in detail below, but in addition to these detailed descriptions, the present application may also have other embodiments.

[0052] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of the features, wholes, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or combinations thereof.

[0053] Now, exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in a variety of different forms and should not be interpreted as being limited to the embodiments set forth herein. It should be understood that these embodiments are provided to make the disclosure of the present application thorough and complete, and to fully convey the concepts of these exemplary embodiments to those of ordinary skill in the art.

[0054] Embodiment 1.

[0055] like Figure 1 It can be seen that a vehicle-mounted carbon-free fuel mixing proportioning valve with a preheating function includes: a front valve component 100 and a rear valve component 200.

[0056] The front valve component 100 includes: a front valve body 101, an ammonia valve 105; its structure is as follows:

[0057] (1) The interior of the front valve body 101 is provided with an upper fluid chamber 102, a lower fluid chamber 103, and a confluence chamber 104; the upper fluid chamber 102 and the lower fluid chamber 103 are arranged in parallel up and down, and the upper fluid chamber 102 is arranged above the lower fluid chamber 103; the upper fluid chamber 102 and the lower fluid chamber 103 are both connected to the confluence chamber 104.

[0058] (2) The upper fluid chamber 102 is used to introduce ammonia water, and the lower fluid chamber 103 is used to introduce hydrogen;

[0059] (3) The ammonia valve 105 is used to control whether the upper fluid chamber 102 is connected to the confluence chamber 104;

[0060] (4) A socket is provided at the right end of the front valve body 101, and an inner surface of the socket is provided with an internal thread.

[0061] The rear valve component 200 includes: a rear valve body 201 and a main valve 206; its structure is as follows:

[0062] (1) A protrusion is provided at the left end of the rear valve body 201, and an outer surface of the protrusion is provided with an external thread. The protrusion of the rear valve body 201 is threadedly connected to the inside of the socket of the front valve body 101;

[0063] (2) The protruding portion is divided into three layers from the inside to the outside: a brass heat-conducting sleeve 202, a heating wire 203, and an external valve body 204; the heating wire 203 is wound around the outer wall of the brass heat-conducting sleeve 202, and a vertical small hole 205 is provided in the external valve body 204; the vertical small hole 205 is used for the heating wire 203 to lead out an electric wire to be energized by an external power source;

[0064] (3) A flange is provided on the left side of the external valve body 204;

[0065] (4) The rear valve body 201 is provided with a flow channel 207 inside; from left to right, the flow channel 207 is divided into a first horizontal flow channel 2071, a first inclined flow channel 2072, a vertical flow channel 2073, a second horizontal flow channel 2074, and a second inclined flow channel 2075;

[0066] (5) The main valve 206 is used to control whether the flow channel 207 is connected;

[0067] (6) A socket is provided at the right end of the rear valve body 201, and an inner surface of the socket is provided with an internal thread for connection with a vehicle pipeline;

[0068] (7) The confluence cavity 104 is correspondingly connected to the first horizontal flow channel 2071.

[0069] It should be noted that the left sides of the upper fluid chamber 102 and the lower fluid chamber 103 are connected to the corresponding medium of the vehicle-mounted fuel storage tank through pipelines.

[0070] It should be noted that the diameter of the pipe of the upper fluid chamber is 10 mm, and the diameter of the pipe of the lower fluid chamber is 15 mm.

[0071] It should be noted that the inclination angle of the first inclined flow channel is 18°, and the inclination angle of the second inclined flow channel is 25°.

[0072] Simulation study:

[0073] (1) The temperature conditions of the proportional valve under different heating powers were analyzed.

[0074] like Figure 5 As shown, the heating ratio gradually increases from 400 W to 200 W until the maximum heating power is 1200 W. The inlet temperature of the hydrogen and NH3 mixed gas is -5 degrees Celsius, and the inlet flow rate of the two gases is 5 g / s.

[0075] The temperature of the heated hydrogen and NH3 mixed gas is as follows Figure 6 As shown, it can be seen that after mixing, the gas temperature rises from 0 degrees Celsius to 10 degrees Celsius after heating.

[0076] Figure 7 It can be seen that as the heating power increases, the average temperature of the heater increases from 50 degrees to 170 degrees.

[0077] Figure 8 to Figure 12 The temperature distribution diagram of the heater and the mixing chamber under different heating powers is shown. The outlet temperature and the heater temperature gradually increase with the increase of heating power, and the temperature distribution is uniform after gas mixing.

[0078] (2) In order to verify the effect of the change in inlet gas flow rate, the flow and heating temperature properties of the proportional valve were studied when the hydrogen flow rate increased from 2.5 g / s to 12.5 g / s.

[0079] The heater power is 1200W, and the hydrogen flow rate changes as follows Fig.13 As shown in the figure, after the hydrogen flow rate increases, the temperature of the mixed gas drops significantly, from 22 degrees to 3.5 degrees. Fig.14 As shown in Figure 2, the average temperature of the heater also dropped significantly, from 250 degrees Celsius to around 100 degrees Celsius. As the intake air flow rate increases, a greater intake pressure is brought about, such as Fig.15 As shown, the inlet pressure rises from 3 atmospheres to 3.7 atmospheres.

[0080] Figures 16 to 20This is the temperature distribution diagram in the heater and mixing chamber when the hydrogen flow rate increases from 2.5 g / s to 12.5 g / s. It can be seen that the temperature of the mixed gas decreases significantly after the intake flow rate increases.

[0081] The preferred embodiments of the present invention have been described in detail above, but it should be understood that after reading the above teachings of the present application, those skilled in the art may make various changes or modifications to the present application. These equivalent forms also fall within the scope of protection of the claims attached to the present application.

Claims

1. A vehicle-mounted carbon-free fuel mixing proportioning valve with a preheating function, characterized in that: include: A front valve component and a rear valve component; Wherein, the front valve component comprises: a front valve body and an ammonia valve; the interior of the front valve body is provided with an upper fluid cavity, a lower fluid cavity and a confluence cavity; the upper fluid cavity and the lower fluid cavity are arranged in parallel up and down; the upper fluid cavity and the lower fluid cavity are both connected with the confluence cavity; the upper fluid cavity is used to pass ammonia, and the lower fluid cavity is used to pass hydrogen; the ammonia valve is used to control whether the upper fluid cavity is connected with the confluence cavity; the right end of the front valve body is provided with a socket, and the inner surface of the socket is provided with an internal thread; The rear valve component includes: a rear valve body and a main valve; a protrusion is provided at the left end of the rear valve body, and an external thread is provided on the outer surface of the protrusion; the protrusion is divided into three layers from the inside to the outside: a brass heat-conducting sleeve, a heating wire, and an external valve body; the heating wire is wound around the outer wall of the brass heat-conducting sleeve; a flow channel is provided inside the rear valve body, and the main valve is used to control whether the flow channel is connected; The matching relationship between the front valve component and the rear valve component is as follows: the protrusion of the rear valve body is threadedly connected to the inside of the socket of the front valve body, and the confluence cavity is correspondingly connected to the flow channel.

2. The vehicle-mounted carbon-free fuel mixing proportion valve with preheating function according to claim 1 is characterized in that: From left to right, the flow channels are divided into a first horizontal flow channel, a first inclined flow channel, a vertical flow channel, a second horizontal flow channel, and a second inclined flow channel.

3. The vehicle-mounted carbon-free fuel mixing proportion valve with preheating function according to claim 1 is characterized in that: The confluence cavity is correspondingly communicated with the first horizontal flow channel.

4. The vehicle-mounted carbon-free fuel mixing proportion valve with preheating function according to claim 1 is characterized in that: The right end of the rear valve body is provided with a socket, and the inner surface of the socket is provided with an internal thread.

5. The vehicle-mounted carbon-free fuel mixing proportion valve with preheating function according to claim 1, characterized in that: A vertical small hole is arranged on the outer valve body.

6. The vehicle-mounted carbon-free fuel mixing proportion valve with preheating function according to claim 1, characterized in that: A flange is arranged on the left side of the outer valve body.

7. A vehicle-mounted carbon-free fuel mixing proportioning valve with a preheating function according to any one of claims 1 to 6, characterized in that: The diameter of the pipe in the upper fluid chamber is 10 mm, and the diameter of the pipe in the lower fluid chamber is 15 mm.

8. The vehicle-mounted carbon-free fuel mixing proportioning valve with a preheating function according to any one of claims 1 to 6, characterized in that: The inclination angle of the first inclined flow channel is 18°, and the inclination angle of the second inclined flow channel is 25°.

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