Ejector assembly capable of controlling the flow rate of the return fluid

Abstract

This utility model belongs to the field of hydrogen fuel cell technology and relates to an ejector assembly capable of controlling the flow rate of reflux fluid. It includes an ejector body with at least one reflux mounting channel. A reflux valve body is installed on the reflux mounting channel. A nozzle is installed inside the ejector flow channel of the ejector body. The reflux channel of the reflux valve body connects to the ejector flow channel. An armature is installed inside the reflux channel. The armature moves up and down to control the opening and closing of the reflux channel and the ejector flow channel. A spring is fitted on the armature. A solenoid valve is installed on the reflux valve body. The upper end of the spring presses against the bottom end face of the solenoid valve, and the lower end of the spring presses against the upper surface of the flange at the lower end of the armature. The flange of the armature presses against the positioning boss in the inner hole of the reflux channel to close the reflux channel. This utility model has a reasonable and ingenious structure, high reliability during operation, and can accurately control the flow rate of the reflux fluid, as well as precisely control the opening and closing of the reflux fluid.

Description

Technical Field

[0001] This utility model belongs to the field of hydrogen fuel cell technology and relates to an ejector assembly capable of controlling the flow rate of the reflux fluid. Background Technology

[0002] An ejector is a device for transporting fluids. It relies on a high-pressure fluid flowing through an ejector nozzle to form a high-speed jet, which then ejects another low-pressure fluid and exchanges momentum within the device, thereby converting the low-pressure fluid into a high-pressure fluid.

[0003] The low-pressure fluid enters the ejector through the return inlet, is repressurized, and then enters the fuel cell stack to resume operation.

[0004] The existing technical solution involves installing a diaphragm before the ejector's return inlet to separate the connection between the fuel cell stack's return gas and the ejector. This solution has poor reliability, cannot achieve complete separation, and cannot control the return flow rate. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides an ejector assembly capable of controlling the flow rate of the reflux fluid, which can precisely control the magnitude of the reflux fluid flow rate.

[0006] According to the technical solution of this utility model: an ejector assembly capable of controlling the flow rate of reflux fluid, characterized in that: it includes an ejector body, the ejector body is provided with at least one reflux installation channel, a reflux valve body is installed on the reflux installation channel, a nozzle is installed in the ejector flow channel of the ejector body, the reflux channel of the reflux valve body is connected to the ejector flow channel, an armature is provided in the reflux channel, and the armature moves up and down to control the opening and closing of the reflux channel and the ejector flow channel;

[0007] A spring is fitted on the armature, and a solenoid valve is installed on the return valve body. The upper end of the spring is pressed against the bottom end face of the solenoid valve, and the lower end of the spring is pressed against the upper surface of the flange at the lower end of the armature. The flange of the armature is pressed against the positioning boss in the inner hole of the return channel to close the return channel. The solenoid valve can overcome the spring resistance and attract the armature to move upward to open the return channel.

[0008] The ejector body has a nozzle installed in the ejector flow channel, and the return channel is connected to the ejector flow channel. The return valve body is also provided with an air inlet channel, which is connected to the return channel.

[0009] As a further improvement of this utility model, the ejector body is provided with two return installation channels, and an ejector flow channel is provided for each of the return installation channels, and the return installation channels are connected to the ejector flow channels.

[0010] As a further improvement of this utility model, the lower part of the reflux channel is formed by a cylindrical part extending to the lower end face of the reflux valve body, and a positioning boss is provided in the lower end inner hole of the cylindrical part; a limiting boss is provided in the inner hole of the reflux installation channel to limit the positioning boss.

[0011] As a further improvement of this utility model, the outlet end of the ejector body is provided with a connecting flange.

[0012] As a further improvement of this utility model, the bottom of the armature adopts a rubber pad structure to form a seal with the ejector body.

[0013] The technical advantages of this utility model are as follows: the utility model has a reasonable and ingenious structure, high reliability during operation, can accurately control the flow rate of the return fluid, and can also accurately control whether the return fluid is on or off. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] Figure 2 for Figure 1 The left view. Detailed Implementation

[0016] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0017] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. The described embodiments are merely some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0018] Figure 1 , 2 The components include ejector body 1, return installation channel 1-1, ejector flow channel 1-2, spring 2, return valve body 3, return channel 3-1, air intake channel 3-2, armature 4, solenoid valve 5, nozzle 6, etc.

[0019] like Figure 1 , 2As shown, this utility model is an ejector assembly capable of controlling the flow rate of the return fluid, including an ejector body 1. The ejector body 1 is provided with at least one return installation channel 1-1. A return valve body 3 is installed on the return installation channel 1-1. A nozzle 6 is installed in the ejector flow channel 1-2 of the ejector body 1. The return channel 3-1 of the return valve body 3 is connected to the ejector flow channel 1-2. An armature 4 is provided in the return channel 3-1. The armature 4 moves up and down to control the opening and closing of the return channel 3-1 and the ejector flow channel 1-2.

[0020] A spring 2 is fitted on the armature 4, and a solenoid valve 5 is installed on the return valve body 3. The upper end of the spring 2 is pressed against the bottom end face of the solenoid valve 5, and the lower end of the spring 2 is pressed against the upper surface of the flange at the lower end of the armature 4. The flange of the armature 4 is pressed against the positioning boss in the inner hole of the return channel 3-1 to close the return channel 3-1. It can be understood that the bottom of the armature 4 adopts a rubber pad structure to form a seal with the ejector body 1; the solenoid valve 5 can overcome the resistance of the spring 2 and attract the armature 4 to move upward to open the return channel 3-1.

[0021] A nozzle 6 is installed in the ejector flow channel of the ejector body 1. The return channel 3-1 is connected to the ejector flow channel. The return valve body 3 is also provided with an air inlet channel 3-2, which is connected to the return channel 3-1.

[0022] The ejector body 1 is provided with two return installation channels 1-1, and an ejector flow channel 1-2 is provided for each of the return installation channels 1-1. The return installation channel 1-1 is connected to the ejector flow channel 1-2.

[0023] The lower part of the return channel 3-1 is formed by a cylindrical part extending from the lower end face of the return valve body 3, and a positioning boss is provided in the lower end inner hole of the cylindrical part; a limiting boss is provided in the inner hole of the return installation channel 1-1 to limit the positioning boss.

[0024] The ejector body 1 has a connecting flange at the outlet end to facilitate a tight connection with an external structure.

[0025] like Figure 1 , 2 As shown, the working principle of this utility model is as follows: This is an ejector assembly that precisely controls the flow rate of the return fluid. The fuel cell return fluid passes through the ejector body 1, and the armature 4 is lifted by the spring force of the spring 2 under the action of the solenoid valve 5 to open the channel, so that the return hydrogen is finally delivered into the ejector body 1 and accelerated in the ejector body 1 to achieve the ejection function.

[0026] When the ejector is working, when unused return medium flows back to the ejector body 1, the solenoid valve 5 matches the required proportion of return fluid according to the controller's command, thereby controlling the magnitude of the electromagnetic force. This gradually opens the armature 4 to a certain degree, allowing the return fluid to pass through. When not in use, the armature 4 returns to its original position under the action of the spring 2, forming a seal with the sealing structure on the return valve body 3, preventing the fluid inside the ejector body 1 from flowing back into the return valve body 3. Furthermore, under different operating conditions of the ejector, different ejector flow channels are required. Therefore, the system can open different solenoid valves 5 according to the controller's needs, connecting the return valve body 3 with different flow channels on the ejector body 1. This achieves precise control of the return fluid flowing through different channels, meeting different system performance requirements.

[0027] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although this utility model has been described in detail with reference to examples, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An ejector assembly capable of controlling the flow rate of the return fluid, characterized in that: The device includes an ejector body (1), which has at least one return installation channel (1-1). A return valve body (3) is installed on the return installation channel (1-1). A nozzle (6) is installed in the ejector flow channel (1-2) of the ejector body (1). The return channel (3-1) of the return valve body (3) is connected to the ejector flow channel (1-2). An armature (4) is provided in the return channel (3-1). The armature (4) moves up and down to control the opening and closing of the return channel (3-1) and the ejector flow channel (1-2). A spring (2) is fitted on the armature (4), and a solenoid valve (5) is installed on the return valve body (3). The upper end of the spring (2) is pressed against the bottom end face of the solenoid valve (5), and the lower end of the spring (2) is pressed against the upper surface of the flange at the lower end of the armature (4). The flange of the armature (4) is pressed against the positioning boss of the inner hole of the return channel (3-1) to close the return channel (3-1). The solenoid valve (5) can overcome the resistance of the spring (2) and attract the armature (4) to move upward, so as to open the return channel (3-1). The ejector body (1) has a nozzle (6) installed in the ejector flow channel, and the return channel (3-1) is connected to the ejector flow channel. The return valve body (3) is also provided with an air inlet channel (3-2), which is connected to the return channel (3-1).

2. The ejector assembly capable of controlling the flow rate of the return fluid as described in claim 1, characterized in that: The ejector body (1) is provided with two return installation channels (1-1), and an ejector flow channel (1-2) is provided for each return installation channel (1-1). The return installation channel (1-1) is connected to the ejector flow channel (1-2).

3. The ejector assembly capable of controlling the flow rate of the return fluid as described in claim 1 or 2, characterized in that: The lower part of the return channel (3-1) is formed by a cylindrical part extending from the lower end face of the return valve body (3), and a positioning boss is provided in the lower end inner hole of the cylindrical part; a limiting boss is provided in the inner hole of the return installation channel (1-1) to limit the positioning boss.

4. The ejector assembly capable of controlling the flow rate of the return fluid as described in claim 1 or 2, characterized in that: The ejector body (1) is provided with a connecting flange at the outlet end.

5. The ejector assembly capable of controlling the flow rate of the return fluid as described in claim 1, characterized in that: The bottom of the armature (4) adopts a rubber pad structure to form a seal with the ejector body (1).

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