Hydrogen injector

Abstract

The application relates to the field of fuel cell technology, in particular to a hydrogen injector, which comprises a body and two groups of control structures; the body comprises a hydrogen inlet, a main hydrogen outlet, a bypass outlet and two channels, the hydrogen inlet and the main hydrogen outlet are communicated through one of the channels; the hydrogen inlet and the bypass outlet are communicated through the other channel; the control structure comprises a motor, a driving rod and a baffle; the baffles of the two groups of control structures are closed and arranged in the two channels; a closed area is arranged on the side wall of the channel, and a passing area is formed; when the baffle cooperates with the closed area, the channel is closed, and when the baffle cooperates with the passing area, the channel is communicated; the motor is adopted for control, the motor controls the stroke of the baffle in the mode of driving the driving rod to move, the control is easy to calibrate due to the passing area of the channel and the baffle; the power source is the motor, the working frequency is low, the failure rate is low, the reliability is good, the overall structure is simpler, and maintenance is facilitated.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of fuel cell technology, in particular to a hydrogen injector. BACKGROUND

[0002] Hydrogen fuel cell is a kind of fuel cell with hydrogen as fuel. Under the chemical reaction of hydrogen and oxygen, electric energy, heat energy are generated, and water is generated. Different hydrogen injection amounts are required when the fuel cell works, and the existing hydrogen injector for controlling the injection amount is mainly electromagnetic valve type, which realizes the injection amount by controlling six electromagnetic valves, and controls the injection amount by controlling the opening and closing of the high-frequency electromagnetic valve. Because the working frequency of the electromagnetic valve is 30-50 Hz, the electromagnetic valve type hydrogen injection has high failure rate and poor reliability. The service life of the electromagnetic valve is generally short.

[0003] When the hydrogen injection fails, the hydrogen inlet stack pressure will be overpressure, which will affect the performance of the stack. In order to easily control and adjust the hydrogen injection amount into the stack, other control and adjustment methods are required. SUMMARY

[0004] The technical problem to be solved by the present application is to provide a hydrogen injector with low working frequency, low failure rate and good reliability.

[0005] In order to solve the above technical problems, the first technical solution adopted by the present application is:

[0006] A hydrogen injector, comprising a body and two groups of control structures;

[0007] The body comprises a hydrogen inlet, a main hydrogen injection outlet, a bypass outlet and two channels, the hydrogen inlet and the main hydrogen injection outlet are communicated through one of the channels; the hydrogen inlet and the bypass outlet are communicated through the other channel;

[0008] The control structure comprises a motor, a drive rod and a baffle; the baffles of the two groups of control structures are closed and arranged in the two channels;

[0009] The side wall of the channel is provided with a closed area and an opening area, the baffle cooperates with the closed area to close the channel, and cooperates with the opening area to communicate the channel; the motor drives the drive rod to drive the baffle to reciprocate between the closed area and the opening area.

[0010] In order to solve the above technical problems, the second technical solution adopted by the present application is:

[0011] A fuel cell system comprising the hydrogen injector described above.

[0012] In order to solve the above technical problems, the third technical solution adopted by the present application is:

[0013] A vehicle comprising the hydrogen injector described above.

[0014] The present application has the advantages that: by using the motor to control the movement of the driving rod, the stroke of the baffle is controlled, and because the gap between the through area of the channel and the baffle is fixed or adjusted as needed, the control is easy to calibrate; and the power source is the motor, which has low working frequency, low failure rate, good reliability, and simple overall structure, facilitating maintenance. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 A cross-sectional view of a hydrogen injector according to an embodiment of the present application;

[0016] Label explanation: 1, hydrogen inlet; 2, main hydrogen injection outlet; 3, bypass outlet; 4, channel; 5, motor; 6, driving rod; 7, baffle; 8, closed area; 9, through area; 10, partition. DETAILED DESCRIPTION

[0017] To explain the technical content, purposes and effects of the present application in detail, the following embodiments are described with reference to the accompanying drawings.

[0018] Please refer to Figure 1 A hydrogen injector, characterized in that it comprises a body and two sets of control structures;

[0019] The body comprises a hydrogen inlet 1, a main hydrogen injection outlet 2, a bypass outlet 3, and two channels 4, the hydrogen inlet 1 and the main hydrogen injection outlet 2 are connected by one of the channels 4; the hydrogen inlet 1 and the bypass outlet 3 are connected by the other channel 4;

[0020] The control structure comprises a motor 5, a driving rod 6, and a baffle 7; the baffles 7 of the two sets of control structures are closed and arranged in the two channels 4;

[0021] The side wall of the channel 4 is provided with a closed area 8 and a through area 9, the baffle 7 cooperates with the closed area 8 to close the channel 4, and cooperates with the through area 9 to connect the channel 4; the motor 5 drives the driving rod 6 to drive the baffle 7 to reciprocate between the closed area 8 and the through area 9.

[0022] As can be seen from the above description, by using the motor 5 to control the movement of the driving rod 6, the stroke of the baffle 7 is controlled, and because the gap between the through area 9 of the channel 4 and the baffle 7 is fixed or adjusted as needed, the control is easy to calibrate; and the power source is the motor 5, which has low working frequency, low failure rate, good reliability, and simple overall structure, facilitating maintenance.

[0023] Further, the baffle 7 is a piston.

[0024] Further, a sealing ring is provided on the outer periphery of the baffle 7.

[0025] Further, the driving rod 6 is a threaded screw rod, and the baffle 7 is provided with a threaded hole matched with the threaded screw rod.

[0026] From the above description, it can be seen that the threaded screw rod is used for control, so as to ensure the accuracy.

[0027] Further, the two channels 4 are provided with a partition 10, and the partition 10 is parallel to the driving rods 6 of the two groups of control structures.

[0028] Further, the passing area 9 is provided with a passing groove on the side wall, and the bottom of the passing groove is flat.

[0029] The closed area 8 and the passing area 9 are arranged on the side wall of the non-partition 10.

[0030] Further, the hydrogen injector is a symmetrical structure, the hydrogen inlet 1 is located at one end of the body, the main hydrogen outlet 2 and the bypass outlet 3 are arranged on the side wall of the body, the two channels 4 are symmetrical in the body, and the two groups of control structures are symmetrically distributed on the body.

[0031] From the above description, it can be seen that the symmetrical hydrogen injector can ensure the stability of the device and the convenience of installation.

[0032] Embodiment one

[0033] A hydrogen injector comprises a body and two groups of control structures.

[0034] The body comprises a hydrogen inlet, a main hydrogen outlet, a bypass outlet and two channels, the hydrogen inlet and the main hydrogen outlet are communicated through one of the channels, and the hydrogen inlet and the bypass outlet are communicated through the other channel.

[0035] The control structure comprises a motor, a driving rod and a baffle, and the baffles of the two groups of control structures are closed and arranged in the two channels.

[0036] The side wall of the channel is provided with a closed area and a passing area, the channel is closed when the baffle cooperates with the closed area, and the channel is communicated when the baffle cooperates with the passing area; the motor drives the driving rod to drive the baffle to reciprocate between the closed area and the passing area.

[0037] The baffle is a piston, and a sealing ring is arranged on the outer periphery of the baffle.

[0038] The driving rod is a threaded screw rod, and the baffle is provided with a threaded hole matched with the threaded screw rod.

[0039] The two channels are provided with a partition, and the partition is parallel to the driving rods of the two groups of control structures.

[0040] The through zone is provided with a through groove on the side wall, and the bottom of the through groove is flat;

[0041] The closed zone and the through zone are arranged on the non-divided side wall.

[0042] The hydrogen injector is a symmetrical structure, the hydrogen inlet is arranged on one end of the body, the main hydrogen outlet and the bypass outlet are arranged on the side wall of the body, the two channels are symmetrically arranged in the body, and the two groups of control structures are symmetrically arranged on the body.

[0043] Embodiment two

[0044] A fuel cell system comprises the hydrogen injector of embodiment one.

[0045] Embodiment three

[0046] A vehicle comprises the hydrogen injector of embodiment one.

[0047] The above only describes the embodiments of the present application, and does not limit the patent scope of the present application, and any equivalent transformation or direct or indirect application in the related technical field by using the content of the specification and drawings of the present application is also included in the patent protection scope of the present application.

Claims

1. A hydrogen sparger, comprising: The hydrogen injector comprises a body and two sets of control structures. The body comprises a hydrogen inlet, a main hydrogen outlet, a bypass outlet and two channels, the hydrogen inlet and the main hydrogen outlet are communicated through one of the channels, and the hydrogen inlet and the bypass outlet are communicated through the other channel. The control structure comprises a motor, a driving rod and a baffle, and the baffles of the two sets of control structures are closed and arranged in the two channels. A side wall of the channel is provided with a closed area and an open area, the baffle cooperates with the closed area to close the channel, and cooperates with the open area to communicate the channel; the motor drives the driving rod to drive the baffle to reciprocate between the closed area and the open area.

2. The hydrogen sparger of claim 1, wherein, The baffle is a piston.

3. The hydrogen sparger of claim 1, wherein, A sealing ring is arranged on the outer periphery of the baffle.

4. The hydrogen sparger of claim 1, wherein, The driving rod is a threaded screw rod, and the baffle is provided with a threaded port matched with the threaded screw rod.

5. The hydrogen sparger of claim 1, wherein, The two channels are separated by a partition, and the driving rods of the two sets of control structures are parallel to each other.

6. The hydrogen sparger of claim 1, wherein, The open area is provided with an open groove on the side wall, and the bottom of the open groove is a flat bottom. The closed area and the open area are arranged on the side wall of the partition.

7. The hydrogen sparger of claim 1, wherein, The hydrogen injector is a symmetrical structure, the hydrogen inlet is arranged on one end of the body, the main hydrogen outlet and the bypass outlet are arranged on the side wall of the body, the two channels are symmetrically arranged in the body, and the two sets of control structures are symmetrically distributed on the body.

8. A fuel cell system characterized by comprising: The hydrogen injector comprises the hydrogen injector according to any one of claims 1-7.

9. A vehicle characterized by comprising: The hydrogen injector comprises the hydrogen injector according to any one of claims 1-7.

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