Ejector assembly with pressurization function

Abstract

This utility model belongs to the field of hydrogen fuel cell technology and relates to an ejector assembly with a pressurization function. It includes an ejector body, a return valve body installed on the top of the ejector body, and the inner cavity of the return valve body communicating with the return port at the top of the ejector body. A turbine fan is rotatably mounted inside the return valve body to compress the fuel cell return gas flowing back to the return valve body. A solenoid valve is installed at the inlet end of the ejector body, and a nozzle is installed on the solenoid valve. The nozzle extends into the mixing chamber of the ejector body, and the nozzle outlet extends to the gas channel inlet end of the ejector body. This assembly can effectively improve the intake efficiency of the return hydrogen gas, and has high structural reliability and is easy to maintain.

Description

Technical Field

[0001] This utility model belongs to the field of hydrogen fuel cell technology and relates to an ejector assembly with a pressurization function. 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 hydrogen-water separator is a key component in the hydrogen circulation system of a fuel cell. Its main function is to separate unreacted hydrogen from the fuel cell stack into gas and liquid components, ensuring that the dried hydrogen can re-participate in the reaction.

[0004] The existing technical solution involves integrating a hydrogen-water separator into the pipeline upstream of the ejector's return inlet to dry the hydrogen. This solution occupies space in the engine layout, increases costs, and introduces significant flow resistance. Summary of the Invention

[0005] To address the aforementioned problems, this utility model provides an ejector assembly with a pressurization function. This assembly can effectively improve the intake efficiency of reflux hydrogen, and has high structural reliability and is easy to maintain.

[0006] According to the technical solution of this utility model: an ejector assembly with a pressurization function, characterized in that: it includes an ejector body, a return valve body is installed on the top of the ejector body, the inner cavity of the return valve body is connected to the return port on the top of the ejector body, and a turbine fan is rotatably arranged in the inner cavity of the return valve body to compress the fuel cell return gas returning to the return valve body;

[0007] A solenoid valve is installed at the air inlet end of the ejector body, and a nozzle is installed on the solenoid valve. The nozzle extends into the mixing chamber of the ejector body, and the outlet of the nozzle extends to the gas channel inlet end of the ejector body.

[0008] As a further improvement of this utility model, the return port corresponds to the flange portion integrally connected to the top surface of the ejector body.

[0009] As a further improvement of this utility model, a worm gear is fixedly connected to the top of the inner cavity of the reflux valve body, and a worm fan is rotatably mounted on the worm gear.

[0010] As a further improvement of this utility model, the worm gear is threadedly connected to the top of the internal cavity of the return valve body.

[0011] As a further improvement of this utility model, the outer surface of the nozzle is conical.

[0012] As a further improvement of this utility model, the outlet end of the gas channel is constructed as a flared structure.

[0013] As a further improvement of this utility model, a liquid outlet is formed between the lower part of the reflux valve body and the ejector body.

[0014] As a further improvement of this utility model, the turbofan is provided in three groups, and the three groups of turbofans are arranged sequentially along the axial direction of the turbofan.

[0015] The technical advantages of this invention are as follows: The invention features a reasonable and ingenious structure. By integrating multiple turbines within the ejector's return port, the turbines rotate when the ejector draws in return hydrogen, increasing the efficiency of hydrogen intake. Furthermore, the return hydrogen condenses water vapor into liquid water upon encountering the cold turbine blades. As the blades rotate, the condensed liquid water is thrown towards the cavity to prevent it from flowing into the bottom collection area and ultimately discharged from the drain port. This invention boasts a simple and reasonable structure, high reliability, and reduced costs. During operation, it effectively increases the intake efficiency of return hydrogen. It also offers high reliability and convenient maintenance. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] Figure 2 This is a schematic diagram of the turbofan structure.

[0018] Figure 3 for Figure 2 Top view. Detailed Implementation

[0019] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0020] 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.

[0021] Figure 1-3 The components include a return valve body 1, a turbine fan 2, a turbine rod 3, an ejector body 4, a return port 4-3, a gas passage 4-2, a solenoid valve 5, and a nozzle 6.

[0022] like Figure 1-3As shown, this utility model is an ejector assembly with a pressurization function, including an ejector body 4. A return valve body 1 is installed on the top of the ejector body 4. In specific production practice, the return valve body 1 and the ejector body 4 are connected by threads. The inner cavity of the return valve body 1 is connected to the return port 4-3 on the top of the ejector body 4. A turbo fan 2 is rotatably installed in the inner cavity of the return valve body 1 to compress the fuel cell return gas returning to the return valve body 1.

[0023] A solenoid valve 5 is installed at the air inlet end of the ejector body 4, and a nozzle 6 is installed on the solenoid valve 5. The nozzle 6 extends into the mixing chamber 4-1 of the ejector body 4, and the outlet of the nozzle 6 extends to the inlet end of the gas passage 4-2 of the ejector body 4.

[0024] The return port 4-3 corresponds to the flange portion integrally connected to the top surface of the ejector body 4.

[0025] The top of the inner cavity of the return valve body 1 is fixedly connected to the worm gear 3, and the worm fan 2 is rotatably mounted on the worm gear 3.

[0026] The worm gear 3 is threaded to the top of the inner cavity of the return valve body 1. Tightening the worm gear 3 can effectively prevent loosening.

[0027] The outer surface of nozzle 6 is conical. The conical structure of nozzle 6 can increase the flow rate of the recirculated gas in the fuel cell.

[0028] The outlet end of gas channel 4-2 is constructed with a flared structure.

[0029] A liquid outlet is formed between the lower part of the reflux valve body 1 and the ejector body 4.

[0030] like Figure 1 As shown, furthermore, to better achieve efficient compression of the fuel cell recirculation gas, the turbofan 2 is provided with three sets, which are arranged sequentially along the axial direction of the turbofan 3. For example... Figure 2 , 3 As shown, multiple first blades 2-1 are evenly distributed along the circumference on the outer surface of the shaft bore seat of the turbofan 2. A second blade 2-2 is positioned between each pair of adjacent first blades 2-1. Both the first blades 2-1 and the second blades 2-2 are spirally arranged along the outer surface of the shaft bore seat of the turbofan 2, with the spiral length of the second blade 2-2 being shorter than the length of the first blade 2-1. During operation, both the first blades 2-1 and the second blades 2-2 compress the airflow downwards. In axial compressors, the low-pressure stage uses longer blades to handle large volumes of airflow, while the high-pressure stage uses shorter, denser blades for fine compression. This stepped design reduces air velocity and gradually increases pressure, which, combined with a reduced duct space, achieves highly efficient compression.

[0031] like Figure 1-3As shown, the working principle of this utility model is as follows: The ejector assembly with pressurization function integrates hydrogen-water separation and pressurization functions. The fuel cell return gas flows through the return valve body 1 and the turbofan 2, and is finally delivered into the ejector body 4. The mainstream hydrogen in the nozzle 6 achieves the ejection function. When the ejector is working, as the hydrogen is ejected from the nozzle 6, it causes the return valve body 1 to enter a negative pressure state, which in turn causes the return gas to flow, thereby driving the turbofan 2 to rotate. After the turbofan rotates, it will accelerate the flow of return hydrogen, compress the return hydrogen, and increase the return pressure. At the same time, when the return hydrogen flows, the water-laden hydrogen collides with the turbofan blades. Due to the temperature difference, the water will condense on the surface of the turbofan. Under the action of the centrifugal force of the rotating turbofan, it will be thrown towards the return valve body 1. Finally, under the action of gravity, it will collect in the water collection tank at the bottom and be discharged through the drain outlet.

[0032] 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 with a pressurization function, characterized in that: Includes an ejector body (4), on the top of the ejector body (4) is a return valve body (1), the inner cavity of the return valve body (1) is connected to the return port (4-3) on the top of the ejector body (4), and a turbine fan (2) is rotatably installed in the inner cavity of the return valve body (1) to compress the fuel cell return gas returning to the return valve body (1). A solenoid valve (5) is installed at the air inlet end of the ejector body (4), and a nozzle (6) is installed on the solenoid valve (5). The nozzle (6) extends into the mixing chamber (4-1) of the ejector body (4), and the outlet of the nozzle (6) extends to the inlet end of the gas passage (4-2) of the ejector body (4).

2. The ejector assembly with pressurization function as described in claim 1, characterized in that: The return port (4-3) corresponds to the flange portion integrally connected to the top surface of the ejector body (4).

3. The ejector assembly with pressurization function as described in claim 1, characterized in that: The top of the inner cavity of the return valve body (1) is fixedly connected to the worm gear (3), and the worm fan (2) is rotatably mounted on the worm gear (3).

4. The ejector assembly with pressurization function as described in claim 3, characterized in that: The worm gear (3) is threaded to the top of the inner cavity of the return valve body (1).

5. The ejector assembly with pressurization function as described in claim 1, characterized in that: The outer surface of the nozzle (6) is conical.

6. The ejector assembly with pressurization function as described in claim 1, characterized in that: The outlet end of the gas channel (4-2) is constructed with a flared structure.

7. The ejector assembly with pressurization function as described in claim 1, characterized in that: The lower part of the reflux valve body (1) forms an outlet between the ejector body (4).

8. The ejector assembly with pressurization function as described in claim 1, characterized in that: The turbofan (2) is provided in three groups, and the three groups of turbofan (2) are arranged sequentially along the axial direction of the worm gear (3).

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