Hydrogen ejector

Abstract

The hydrogen ejector comprises an ejector body provided with a suction cavity, a valve element assembly, an electromagnetic assembly, at least one gas inlet and a shell arranged outside the upper end of the ejector body, and an ejection nozzle communicated with the suction cavity is arranged at the bottom of the ejector body; the valve element assembly is arranged in the suction cavity and moves in the suction cavity in the axis direction of the device body to open or close the ejection nozzle. The electromagnetic assembly is arranged between the device body and the shell and used for controlling the valve element assembly to move. The end, close to the nozzle, of the air inlet is formed in the device body and communicated with the suction cavity. The flow distance of hydrogen in the ejector is greatly shortened, the vent groove is formed in the valve body assembly so that it can be guaranteed that the pressure in cavities in the two ends of the valve body assembly can be kept consistent, the resistance generated when the valve element assembly moves is reduced, the response speed of the valve element assembly is increased, the injection amount of the hydrogen can be more accurately controlled, and the overall size is small.

Description

Technical Field

[0001] This application relates to the technical field of ejectors, and particularly to a hydrogen ejector. Background Art

[0002] As an important part of the hydrogen circulation system of a fuel cell, the hydrogen ejector provides sufficient hydrogen for the fuel cell stack to ensure the stable progress of the electrochemical reaction in the fuel cell stack. At present, the hydrogen ejectors applied in the market are mainly modified from fuel injectors or gas injectors, and their use effects are generally not good. The intake end is far from the injection port, so the conveying channel is long. Hydrogen can only flow to the injection port through the through hole in the middle of the valve stem. When the injector is opened, the resistance acting on the valve core is large, resulting in a slow response speed of the ejector, inaccurate injection volume, and a large volume. Summary of the Utility Model

[0003] This application provides a hydrogen ejector to solve the problem of inaccurate injection volume caused by the slow response speed of the ejector in the prior art, and adopts the following technical solutions:

[0004] The hydrogen ejector includes a body with a suction chamber, and a housing arranged outside the upper end of the body. The bottom of the body is provided with an outlet nozzle communicating with the suction chamber;

[0005] A valve core assembly, which is arranged in the suction chamber and moves in the suction chamber along the axis direction of the body to open or close the outlet nozzle;

[0006] An electromagnetic assembly, which is arranged between the body and the housing and is used to control the movement of the valve core assembly;

[0007] At least one intake port, which is opened on the body near one end of the nozzle and communicates with the suction chamber; the distance between the intake port and the outlet nozzle can be reduced, so that hydrogen can quickly be ejected from the outlet nozzle after entering the suction chamber through the intake port, thereby improving the response speed of the ejector.

[0008] Preferably, the valve core assembly includes a valve stem and an armature. The armature is sleeved outside the valve stem, and at least one ventilation groove is arranged on the valve core assembly to communicate the cavities at both ends of the armature; the ventilation groove can ensure that the pressures in the cavities at both ends of the armature are kept consistent, thereby reducing the resistance when the valve core assembly is opened or closed.

[0009] Further preferably, a sealing body is arranged at the bottom of the valve stem, and an annular protrusion corresponding to the sealing body is arranged on the outlet nozzle; when the valve stem abuts against the outlet nozzle, the sealing body can block the annular protrusion.

[0010] Preferably, the air inlets are circumferentially and uniformly distributed on the side wall of the body, so as to ensure that hydrogen can enter the suction cavity evenly from the air inlets and reduce hydrogen fluctuations.

[0011] Preferably, the inside of the valve stem is a hollow structure, which can reduce the weight of the valve stem and further improve the response speed of the injector.

[0012] Preferably, sealing components are provided between the outlet nozzle and the body, and on the body on both the upper and lower sides of the air inlet, so as to prevent hydrogen leakage.

[0013] Preferably, a buffer component is further included, and the buffer component is arranged between the body and the valve core assembly. When the valve core assembly is closed, it can buffer the valve stem.

[0014] The beneficial effects of this application are as follows:

[0015] (1) The air inlet is arranged on the side wall of the body close to the outlet nozzle, thus shortening the distance from hydrogen to the outlet nozzle. When hydrogen enters the suction cavity through the air inlet and the electromagnetic component is energized to control the valve core assembly to open the outlet nozzle, hydrogen can be quickly ejected from the outlet nozzle, improving the response speed of the hydrogen ejector and having a small overall volume.

[0016] (2) The valve core assembly is provided with a ventilation groove to connect the cavities at the upper and lower ends of the armature, that is, to connect the suction cavities on both sides of the box body, so as to ensure that the pressures in the cavities at both ends of the armature are balanced, reduce the resistance when the valve core assembly moves, improve the speed of the valve core assembly when opening or closing, and thus more accurately control the injection amount of hydrogen. Description of the Drawings

[0017] Figure 1 is a three-dimensional structural schematic diagram of this application;

[0018] Figure 2 is a half-sectional view of this application.

[0019] In the figure:

[0020] 1. Body, 2. Housing, 3. Valve core assembly, 30. Ventilation groove, 31. Valve stem, 32. Armature, 4. Electromagnetic component, 5. Air inlet, 6. Outlet nozzle, 7. Buffer component, 8. Sealing component, 9. Suction cavity. Detailed Embodiments

[0021] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts belong to the scope of protection of the present application.

[0022] Combined with Figures 1 to 2 , the present application is further described. The hydrogen ejector includes a body 1 provided with an inhalation chamber 9, and a housing 2 provided outside the upper end of the body 1. The bottom of the body 1 is provided with an outlet nozzle 6 communicating with the inhalation chamber 9. Among them, the outlet nozzle 6 has a jet orifice for hydrogen to be ejected.

[0023] A valve core assembly 3 is arranged in the inhalation chamber 9 and moves in the inhalation chamber 9 along the axis of the body 1 to open or close the outlet nozzle 6; to open or close the jet orifice.

[0024] An electromagnetic assembly 4 is arranged between the body 1 and the housing 2 and is used to control the up and down movement of the valve core assembly 3 in the inhalation chamber 9. After the electromagnetic assembly is energized, it drives the valve core assembly to move upward to open the outlet nozzle 6 to eject hydrogen. When the electromagnetic assembly is de-energized, the valve core assembly moves downward to close the outlet nozzle 6 and stop ejecting hydrogen.

[0025] At least one air inlet 5 is opened on the body 1 near one end of the nozzle and communicates with the inhalation chamber 9. Among them, the air inlets 5 are circumferentially and evenly distributed on the side wall of the body 1 to ensure that hydrogen can enter the inhalation chamber 9 evenly and reduce hydrogen fluctuations. In this embodiment, the number of the air inlets 5 is 4, which can greatly shorten the length of the hydrogen flow passage. The hydrogen entering the inhalation chamber can be quickly ejected from the outlet nozzle when the valve core assembly is opened, thereby improving the response speed of the ejector.

[0026] Combined with Figure 2, the spool assembly 3 includes a valve stem 31 and an armature 32. The armature 32 is sleeved outside the valve stem 31. The armature 32 divides the suction chamber into upper and lower cavities. At least one ventilation groove 30 is provided on the spool assembly 3 to communicate with the cavities on both sides of the armature 32. The ventilation groove 30 can enable the hydrogen in the cavities on both sides of the spool assembly to flow through each other, thereby avoiding inconsistent pressures in the upper and lower cavities of the spool assembly when it moves, and large resistance during movement; it can improve the moving speed of the spool assembly in the suction chamber. In this embodiment, the ventilation groove 30 is provided on the valve stem. Of course, the ventilation groove 30 can also be provided on the armature to reduce the weight of the spool assembly. Among them, the inside of the valve stem 31 is a hollow structure, which can reduce the weight of the valve stem 31 to improve the response speed of the spool assembly 3 and enable more precise control of the hydrogen injection volume.

[0027] In some embodiments, a limiting block is provided on the side wall of the suction chamber 9 to limit the movement range of the spool assembly.

[0028] A sealing body is provided at the bottom of the valve stem 31. The outlet nozzle 6 is provided with an annular protrusion corresponding to the sealing body. The annular protrusion is arranged around the injection port. When the sealing body is an elastic sealing body, it can improve the sealing effect of the injection port and protect the outlet nozzle at the same time. When the valve stem 31 abuts against the outlet nozzle 6, the sealing body can block the annular protrusion, thereby sealing the outlet nozzle 6 and preventing leakage. Among them, the sealing body can be a rubber pad.

[0029] Combined with Figure 2 , in order to prevent hydrogen leakage when the ejector is working; sealing components 8 are provided between the outlet nozzle 6 and the body 1, and on the body 1 on both sides of the air inlet 5, so as to avoid hydrogen leakage and make the structure more compact.

[0030] In some embodiments, a buffer component 7 is further included. The buffer component 7 is provided between the body 1 and the spool assembly 3. When the electromagnetic component 4 is powered off, the buffer component 7 can push the spool assembly 3 to close, which can play a buffering role for the valve stem 31 and ensure that the spool assembly 3 can open or close the outlet nozzle 6 smoothly.

[0031] The hydrogen ejector described in this application is also applicable to the injection of other gases.

Claims

1. A hydrogen ejector, characterized in that: It comprises a body provided with a suction chamber, and a shell provided outside the upper end of the body, and an outlet nozzle communicating with the suction chamber is provided at the bottom of the body; A valve core assembly, the valve core assembly is arranged in the suction chamber, moves in the suction chamber along the axis direction of the body, and opens or closes the outlet nozzle; An electromagnetic assembly, the electromagnetic assembly being arranged between the device body and the housing and being used to control the movement of the valve core assembly; At least one air inlet is provided on the body near one end of the nozzle and is connected to the suction chamber.

2. The hydrogen ejector according to claim 1, characterized in that: The valve core assembly comprises a valve stem and an armature, wherein the armature is sleeved on the outside of the valve stem, and the valve core assembly is provided with at least one venting groove communicating with the cavities at both ends of the armature.

3. The hydrogen ejector according to claim 2, characterized in that: A sealing body is provided at the bottom of the valve stem, and an annular protrusion corresponding to the sealing body is provided on the outlet nozzle.

4. The hydrogen ejector according to claim 1, characterized in that: The air inlets are evenly distributed on the side wall of the device body in a circumferential direction.

5. The hydrogen ejector according to claim 2, characterized in that: The interior of the valve stem is a hollow structure.

6. The hydrogen ejector according to claim 1, characterized in that: Sealing components are provided between the ejection nozzle and the device body, and on the device body at both upper and lower sides of the air inlet.

7. The hydrogen ejector according to claim 1, characterized in that: It also includes a buffer component, which is arranged between the device body and the valve core assembly.

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