Hydrogen ejector testing device

Abstract

The utility model provides a hydrogen ejector testing device, and relates to the technical field of ejector durability testing, in the hydrogen ejector testing device, a gas source provides high-pressure air, a drying mechanism and a filtering mechanism sequentially dry and filter the high-pressure air, and a testing mechanism comprises an ejector tool and a testing assembly. The ejector tool is used for installing a hydrogen ejector, and the hydrogen ejector is connected with the filtering mechanism and the pressure adjusting unit through the ejector tool. According to the hydrogen ejector testing device, high-pressure air provided by the air source can be dried and filtered in sequence, the quality of the air source provided for the testing mechanism can be improved, the working condition of the hydrogen ejector in the actual working process can be simulated more truly when the durability test is carried out on the hydrogen ejector, and the testing efficiency of the hydrogen ejector is improved. Therefore, the reliability of the test result of the hydrogen ejector test device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of injector durability testing, in particular to a hydrogen injector testing device. Background Art

[0002] A hydrogen injector is a device used to inject hydrogen into a specific area at a specific pressure, velocity, and flow rate. Its operating principle is based on the injection principle in fluid mechanics, accelerating high-pressure hydrogen through a nozzle and other structures.

[0003] As a key component in the hydrogen subsystem of a fuel cell, the hydrogen injector mainly controls the hydrogen inlet pressure and flow of the fuel cell based on the operating conditions of the fuel cell stack, adjusting the frequency and pulse width.

[0004] During the development of fuel cells, durability tests are required for systems, stacks, and components. Therefore, a durability test system for hydrogen injectors is also required to complete the durability test.

[0005] Although existing hydrogen injector testing devices can perform durability tests on hydrogen injectors, most of them are aimed at performance tests of hydrogen injectors and are difficult to simulate the actual working conditions of hydrogen injectors. Using them for durability tests of hydrogen injectors may affect the test results. Utility Model Content

[0006] In view of this, the present invention aims to provide a hydrogen injector testing device to improve the reliability of hydrogen injector durability testing.

[0007] In order to achieve the above-mentioned purpose, the technical solution of the utility model is achieved as follows:

[0008] A hydrogen injector testing device comprises a gas source, a drying mechanism, a filtering mechanism, a testing mechanism and a pressure regulating unit;

[0009] The air source is used to provide high-pressure air;

[0010] The drying mechanism and the filtering mechanism are sequentially connected to the outlet of the air source, the drying mechanism is used to dry the high-pressure air, and the filtering mechanism is used to filter the dried high-pressure air;

[0011] The testing mechanism includes an injector tooling and a testing assembly. The injector tooling is used to install a hydrogen injector. The hydrogen injector is connected to the filtering mechanism and the pressure regulating unit respectively via the injector tooling. The testing assembly includes a first pressure detection unit provided on the connecting pipeline between the injector tooling and the filtering mechanism, and a second pressure detection unit and a flow detection unit provided on the connecting pipeline between the injector tooling and the pressure regulating unit.

[0012] Furthermore, the air source includes a screw air compressor.

[0013] Furthermore, the drying mechanism includes a cold dryer and a micro-heat absorption dryer connected in sequence along the flow direction of the high-pressure gas.

[0014] Furthermore, the filtering mechanism includes a nine-stage filter.

[0015] Furthermore, a pressure reducing valve is provided on the connecting pipeline between the ejector tooling and the filtering mechanism, and the first pressure detecting unit is provided downstream of the pressure reducing valve along the flow direction of the high-pressure gas.

[0016] Furthermore, the pressure regulating unit includes a back pressure valve.

[0017] Furthermore, an exhaust muffler is provided at the gas outlet of the pressure regulating unit.

[0018] Furthermore, the testing mechanism is divided into multiple groups, and the multiple groups of testing mechanisms are arranged in parallel.

[0019] Furthermore, it further comprises a plurality of first controllers and second controllers, wherein the first controllers correspond to the test mechanisms one by one, and each first controller is connected to the hydrogen injector installed in the corresponding test mechanism;

[0020] The second controller is connected to each of the first pressure detection units, each of the second pressure detection units, and each of the flow detection units, respectively.

[0021] Furthermore, it also includes a host computer and multiple current acquisition units, the current acquisition units correspond one to one with the hydrogen injectors, the host computer is connected to each of the first controllers, the second controller and each of the current acquisition units respectively, and each of the current acquisition units is used to collect the driving current of the corresponding hydrogen injector.

[0022] Compared with the prior art, the present invention has the following advantages:

[0023] The hydrogen injector testing device described in the present invention can sequentially dry and filter the high-pressure air provided by the gas source, which is beneficial to improving the quality of the gas source provided to the testing mechanism. When performing a durability test on the hydrogen injector, it can more realistically simulate the working conditions of the hydrogen injector during its actual working process, thereby helping to improve the reliability of the test results of the hydrogen injector testing device.

[0024] In addition, a flow detection unit is installed to monitor the airflow during the operation of the hydrogen injector, making it easier to judge the performance of the hydrogen injector tooling. The air source adopts a screw air compressor, which is an existing structure with mature structure and relatively reliable performance. The drying mechanism includes a cold dryer and a micro-heat adsorption dryer, which can effectively dry the high-pressure air and achieve excellent drying performance.

[0025] In addition, the filtration mechanism includes a nine-stage filter, which has a good filtration effect and can effectively prevent air pollutants such as dust from affecting the test results of the hydrogen injector. A pressure reducing valve is installed on the connecting pipeline between the injector tooling and the filtration mechanism to facilitate regulating the pressure of the high-pressure gas increased by the gas source, thereby conveniently providing high-pressure air at an appropriate pressure to the test mechanism.

[0026] Including a back-pressure valve in the pressure regulating unit ensures a certain back pressure at the test unit's airflow outlet, effectively preventing backflow and ensuring the required pressure at the back-pressure valve outlet. Installing an exhaust muffler at the gas outlet of the pressure regulating unit reduces noise generated during the exhaust process, keeping exhaust noise within an acceptable range while minimizing obstruction to exhaust flow.

[0027] Furthermore, by configuring the test mechanism into multiple groups, multiple hydrogen injectors can be subjected to durability tests simultaneously. The configuration of a host computer, a first controller, a second controller, and a current acquisition unit improves the convenience of hydrogen injector testing. This not only facilitates the control of each hydrogen injector but also facilitates the collection of measured data such as air pressure and airflow, facilitating automated testing and making test data readily available to test personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings, which constitute part of the present invention, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0029] Figure 1 This is a schematic structural diagram of the hydrogen injector testing device according to an embodiment of the present utility model;

[0030] Figure 2 This is a schematic diagram of the control principle of the hydrogen injector testing device according to an embodiment of the present utility model;

[0031] Figure 3 This is a schematic diagram of the circuit principle of the driving circuit in the first controller according to an embodiment of the present utility model;

[0032] Figure 4 This is a schematic diagram of the driving current waveform of the hydrogen injector testing device according to an embodiment of the present utility model.

[0033] Description of reference numerals:

[0034] 1. Air source; 2. Drying mechanism; 3. Filter mechanism; 5. Pressure reducing valve; 6. Ejector tooling; 7. First pressure detection unit; 8. Second pressure detection unit; 9. Pressure regulating unit; 10. Flow detection unit; 11. Exhaust muffler; 12. First controller; 13. Host computer; 14. Current acquisition unit; 15. Second controller;

[0035] 1201, control unit; 1202, boost circuit; 1203, battery power supply; 1204, high-voltage open circuit; 1205, maintaining current circuit; 1206, hydrogen injector; 1207, low-end drive circuit. DETAILED DESCRIPTION

[0036] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other.

[0037] In the description of this utility model, it should be noted that the orientations or positional relationships shown in the accompanying drawings are merely for the purpose of facilitating the description of this utility model and simplifying the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0038] Additionally, in the description of this utility model, unless otherwise explicitly defined, the terms "mounted," "connected," "connect," and "connector" should be interpreted broadly. For example, these terms may refer to fixed, removable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; or internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on specific circumstances.

[0039] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0040] This embodiment relates to a hydrogen injector testing device that can more realistically simulate the working conditions of the hydrogen injector during its actual operation, thereby facilitating improved reliability of test results of the hydrogen injector testing device.

[0041] Based on the above design concept, an exemplary structure of the hydrogen injector test device of this embodiment is as follows: Figure 1 As shown, in terms of overall structure, the hydrogen injector testing device of this embodiment mainly includes a gas source 1, a drying mechanism 2, a filtering mechanism 3, a testing mechanism and a pressure regulating unit 9.

[0042] It should be understood that the hydrogen injector 1206 actually injects hydrogen during operation, and in this embodiment, the gas source 1 is used to provide high-pressure air so that the hydrogen injector 1206 injects air during the test, which helps to reduce the test cost.

[0043] In this embodiment, drying mechanism 2 and filtering mechanism 3 are sequentially connected to the outlet of air source 1. This arrangement allows the high-pressure air provided by air source 1 to flow first through drying mechanism 2 and then through filtering mechanism 3. Both drying mechanism 2 and filtering mechanism 3 employ conventional structures, with drying mechanism 2 used to dry the high-pressure air and filtering mechanism 3 used to filter the dried high-pressure air, thereby providing clean, dry, high-pressure air at a specified pressure to the testing device.

[0044] The aforementioned testing mechanism includes an injector fixture 6 and a testing assembly. The injector fixture 6 is used to mount a hydrogen injector 1206, which is connected to the filter mechanism 3 and the pressure regulating unit 9 via the injector fixture 6. The testing assembly includes a first pressure detection unit 7 provided on the pipeline connecting the injector fixture 6 and the filter mechanism 3, as well as a second pressure detection unit 8 and a flow detection unit 10 provided on the pipeline connecting the injector fixture 6 and the pressure regulating unit 9.

[0045] It should be noted that the injector fixture 6 in this embodiment may adopt a structure in the prior art, for example, and its main function is to fix the hydrogen injector 1206 and facilitate the connection of the hydrogen injector 1206 with the filtering mechanism 3 and the pressure regulating unit 9.

[0046] In specific implementation, the injector tooling 6 includes, for example, a first mounting part and a second mounting part, which can slide relative to each other, and a connecting part can be provided between the first mounting part and the second mounting part. The connecting part can be, for example, a bolt that passes through the first mounting part and can tighten the second mounting part.

[0047] A first connector is provided on the first mounting member, one end of which is connected to the filter mechanism 3 ; a second connector is provided on the second mounting member, one end of which is connected to the pressure regulating unit 9 ; a hydrogen injector 1206 to be tested is installed between the other end of the first connector and the other end of the second connector.

[0048] During actual use, the bolts are loosened, allowing the first and second mounting members to slide relative to each other. Before installing the hydrogen injector 1206, the first and second mounting members slide relatively apart to a position convenient for installing the hydrogen injector 1206. After installing the hydrogen injector 1206, the first and second mounting members slide relatively close together to a position that can secure the hydrogen injector 1206, and the bolts are tightened to stably install the hydrogen injector 1206. At this point, a structure is formed in which one end of the hydrogen injector 1206 is connected to the filter mechanism 3 via the injector fixture 6, and one end of the hydrogen injector 1206 is connected to the pressure regulating unit 9 via the injector fixture 6.

[0049] In this embodiment, the first pressure detection unit 7 is provided to facilitate detection of the pressure of the airflow entering the hydrogen injector 1206, and the second pressure detection unit 8 is provided to facilitate detection of the pressure of the airflow flowing out of the hydrogen injector 1206. The flow detection unit 10 is provided to facilitate monitoring the airflow rate during the operation of the hydrogen injector 1206, thereby facilitating judgment of the working performance of the hydrogen injector 1206.

[0050] In order to improve the reliability of the test device, as a preferred embodiment, the air source 1 includes a screw air compressor, which can be, for example, an existing micro-oil screw air compressor. It should be understood that the screw air compressor used in the air source 1 is an existing structure with a mature structure and relatively reliable working performance.

[0051] During the high-pressure air delivery process, to prevent the external environment from affecting the test results, as a preferred embodiment, the drying mechanism 2 includes a cold dryer and a micro-heat adsorption dryer connected in sequence along the flow direction of the high-pressure gas. It should be noted that the cold dryer and micro-heat adsorption dryer provided here are both products of the prior art.

[0052] The refrigerated dryer, also known as a refrigerated dryer, is primarily used for preliminary drying of compressed air, facilitating the removal of moisture from the high-pressure air. The micro-heat adsorption dryer, on the other hand, is used to further dry the high-pressure air after drying it in the refrigerated dryer, further removing moisture from the compressed air. The inclusion of both a refrigerated dryer and a micro-heat adsorption dryer in the drying mechanism 2 provides a superior drying effect on the high-pressure air, resulting in excellent drying performance. This allows the hydrogen injector test device to more realistically simulate the actual operating conditions of the hydrogen injector 1206.

[0053] To provide a clean, dry air source 1 for the testing facility, the aforementioned filtering mechanism 3 preferably includes a nine-stage filter. This nine-stage filter can be a standard component. The inclusion of a nine-stage filter in the filtering mechanism 3 provides excellent filtering performance, effectively preventing airborne contaminants such as dust from affecting the test results of the hydrogen injector 1206. It should be understood that, in addition to the nine-stage filter, the filtering mechanism 3 can also include other existing filtering devices to enhance the cleaning effect of the high-pressure air.

[0054] As a preferred embodiment, a pressure reducing valve 5 is provided on the connecting pipeline between the ejector fixture 6 and the filter mechanism 3, and a first pressure detection unit 7 is provided downstream of the pressure reducing valve 5 along the flow direction of the high-pressure gas. Providing the pressure reducing valve 5 on the connecting pipeline between the ejector fixture 6 and the filter mechanism 3 facilitates regulating the pressure of the high-pressure gas increased by the gas source 1, thereby conveniently providing high-pressure air of appropriate pressure to the testing mechanism.

[0055] Still refer to Figure 1 As shown, as a preferred embodiment, the aforementioned pressure regulating unit 9 includes a back pressure valve connected to the outlet pipe of the hydrogen injector 1206. The back pressure valve can specifically adopt standard parts in the prior art. Here, the back pressure valve provided can ensure a certain back pressure at the air flow outlet of the test mechanism, effectively prevent the air flow from flowing back, and ensure that the required pressure value is maintained on the outlet side of the back pressure valve.

[0056] In order to reduce noise and provide a better testing environment for the tester, as a preferred embodiment, an exhaust muffler 11 is provided at the gas outlet of the pressure regulating unit 9. As in this embodiment, the exhaust muffler 11 is specifically connected to the outlet of the back pressure valve.

[0057] It should be noted that installing an exhaust muffler 11 at the gas outlet of the pressure regulating unit 9 can reduce noise generated during the exhaust process, keeping exhaust noise within an acceptable range while minimizing obstruction to the exhaust flow. Furthermore, the exhaust muffler 11 can be any conventional structure. Installing the exhaust muffler 11 at the exhaust port of the hydrogen injector 1206 can more realistically simulate the actual operating conditions of the hydrogen injector 1206, thereby improving test reliability.

[0058] Still refer to Figure 1 As shown, as a preferred embodiment, multiple groups of testing mechanisms are provided, each of which is arranged in parallel. In this embodiment, multiple groups of testing mechanisms are arranged in parallel. Specifically, the airflow inlet of each testing mechanism is connected to the outlet of the pressure reducing valve 5, while the airflow outlet of each testing mechanism is connected to the airflow inlet of the back pressure valve. By providing multiple groups of testing mechanisms, durability testing can be performed on multiple hydrogen injectors 1206 simultaneously, improving testing efficiency.

[0059] It should be understood that the number of test groups is not limited to Figure 1 The six groups mentioned above can also be set to other numbers, such as two groups, three groups, five groups, etc.

[0060] like Figure 2 As shown, as a preferred embodiment, it also includes multiple first controllers 12 and second controllers 15, and the multiple first controllers 12 correspond to the test mechanisms one by one. Each first controller 12 is respectively connected to the hydrogen injector 1206 installed in the corresponding test mechanism, so that each first controller 12 can respectively control the hydrogen injector 1206 in the corresponding test mechanism.

[0061] The second controller 15 is connected to each first pressure detection unit 7, each second pressure detection unit 8, and each flow detection unit 10. Here, the first pressure detection unit 7 and the second pressure detection unit 8 can be, for example, existing pressure sensors, and the flow detection unit 10 can be, for example, an existing flow sensor.

[0062] Since the structures of each group of test institutions are the same, we will take one group of test institutions as an example to explain. Figure 2 As shown, the first pressure detection unit 7 transmits the detected gas pressure information flowing into the hydrogen injector 1206 to the second controller 15, the second pressure detection unit 8 is used to transmit the detected gas pressure information flowing out of the hydrogen injector 1206 to the second controller 15, and the flow detection unit 10 is used to transmit the detected gas flow information flowing out of the hydrogen injector 1206 to the second controller 15, and the second controller 15 transmits the pressure information from the first pressure detection unit 7 and the second pressure detection unit 8 and the flow information from the flow detection unit 10 to the following host computer 13 for display, so as to facilitate fault diagnosis.

[0063] Preferably, the hydrogen injector testing device further includes a host computer 13 and current acquisition units 14. The number of current acquisition units 14 corresponds one-to-one with the number of hydrogen injectors 1206, and the number of current acquisition units 14 corresponds one-to-one with the number of first controllers 12. Each current acquisition unit 14 can, for example, employ an existing Hall effect sensor. The host computer 13 is connected to each first controller 12, the second controller 15, and each current acquisition unit 14, respectively.

[0064] It should be noted that the host computer 13 here can be, for example, an existing computer, tablet, mobile phone, etc., and specifically, each first controller 12 and the host computer 13 can communicate with each other through, for example, a CAN bus, and each first controller 12 receives instructions from the host computer 13 to work. The specific working process is described in the context.

[0065] Each current acquisition unit 14 is used to collect the driving current signal transmitted by the corresponding first controller 12 to the corresponding hydrogen injector 1206, and convert the current signal into a voltage signal and transmit it to the host computer 13 for feedback counting, which can facilitate the host computer 13 to record the driving current signal of each hydrogen injector 1206.

[0066] It should be noted that the host computer 13 can also be connected to a data storage unit not shown in the figure. The data storage unit provided can facilitate the storage of pressure information from the first pressure detection unit 7 and the second pressure detection unit 8 and flow information from the flow detection unit 10.

[0067] The aforementioned host computer 13 can transmit control signals such as command parameters such as the driving frequency and the injection pulse width signal to each first controller 12. Each first controller 12 is connected to the corresponding hydrogen injector 1206, and each first controller 12 transmits the corresponding driving signal to the corresponding hydrogen injector 1206. At the same time, it outputs a digital signal to the current acquisition unit 14 to trigger the start of the acquisition task, thereby ensuring that the data collected for each injection is zero-point aligned.

[0068] The current acquisition unit 14 is synchronized with the drive signal of the corresponding hydrogen injector 1206 to ensure that no process is missed. After receiving the start test command, each first controller 12 begins outputting the solenoid valve drive signal according to the set parameters and sets its designated IO port high. This IO port is low in the idle state. The host computer 13 monitors the changes in the level signal through the current acquisition unit 14. When a rising edge is detected, the host computer 13 begins data acquisition. When the host computer 13 determines that the actual number of injections has reached the target number of injections, it sends a stop measurement command and stops data acquisition. The controller sets the IO port low and waits for the next measurement.

[0069] In the above structure, the host computer 13 and the first controller 12 are provided to improve the convenience of testing the hydrogen injectors 1206. It is not only convenient to control each hydrogen injector 1206, but also convenient to collect measured data such as air pressure and air flow, facilitate the automation of the test, and help testers obtain test data from the host computer 13.

[0070] It should be noted that the first controller 12 and the second controller 15 can both be existing controllers. Figure 3 As shown in , it mainly includes a control unit 1201, a BOOST circuit 1202, a high-voltage open circuit 1204, a maintaining current circuit 1205 and a low-end drive circuit 1207. The control unit 1201, the BOOST circuit 1202, the high-voltage open circuit 1204, the maintaining current circuit 1205 and the low-end drive circuit 1207 can all refer to the structure in the prior art.

[0071] Boost circuit 1202, also known as a step-up circuit, is a DC-DC converter whose primary function is to convert a low DC input voltage into a higher DC voltage. High-voltage open circuit 1204 is a circuit structure operating in a high-voltage environment. It is characterized by an open physical structure or electrical connection method, rather than being completely enclosed in a shielded box or other enclosure.

[0072] The current-maintaining circuit 1205 maintains the current in the circuit at a specific value. Its primary function is to provide a stable current supply to the load, ensuring that the load receives a constant current under various conditions (such as power supply voltage fluctuations and changes in load resistance), thereby ensuring normal operation. The low-end driver circuit 1207 is a critical component of the electronic system. Located between the control circuit and the load circuit, it converts the control circuit's control signal into the drive signal required by the load circuit.

[0073] The holding current circuit 1205 requires a separate power source, such as the battery power source 1203 in this embodiment. The first controller 12 also includes a power source for supplying power to the control unit 1201, which is not shown in the figure.

[0074] Specifically, the load, such as the aforementioned hydrogen injector 1206, is connected to the high-voltage open circuit 1204 at one end and to the holding current circuit 1205 at the other end.

[0075] For example, when the control unit 1201 controls the high-voltage open circuit 1204 to be turned on and the maintaining current circuit 1205 to be interrupted, the high-voltage open circuit 1204 supplies power to the hydrogen injector 1206, and when the control unit 1201 controls the high-voltage open circuit 1204 to be interrupted and the maintaining current circuit 1205 to be turned on, the maintaining current circuit 1205 supplies power to the hydrogen injector 1206.

[0076] More specifically, the control unit 1201 is based on Figure 4 The waveform of the driving current shown in FIG. 1 is used to power the hydrogen injector 1206. Figure 4 The horizontal axis represents time and the vertical axis represents current value. The specific values ​​of time and current value are not limited in this embodiment, and can be specifically referred to the driving current of the hydrogen injector 1206 during actual operation.

[0077] When the driving current is the peak current, Figure 3 The high-voltage open circuit 1204 shown provides power to the hydrogen injector 1206 , and when the driving current is the holding current, the maintaining current circuit 1205 provides power to the hydrogen injector 1206 .

[0078] Finally, it should be noted that the host computer 13 in this embodiment may also be connected to an alarm unit (not shown in the figure). The alarm unit may be, for example, a conventional buzzer, an audible and visual alarm, a display light, etc. If the host computer 13 monitors the outlet pressure and flow rate of any hydrogen injector 1206 and detects that the pressure and flow rate deviate from the set values ​​by a predetermined difference, such as 20% or more, the host computer 13 sends a message to the alarm unit, which then issues an alarm and stops driving the hydrogen injector 1206.

[0079] The hydrogen injector testing device of this embodiment can sequentially dry and filter the high-pressure air provided by the gas source 1, which is beneficial to improving the quality of the gas source 1 provided to the testing organization. When performing a durability test on the hydrogen injector 1206, it can more realistically simulate the working conditions of the hydrogen injector 1206 during its actual working process, thereby improving the reliability of the test results of the hydrogen injector testing device.

[0080] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A hydrogen injector testing device, characterized in that: It comprises an air source (1), a drying mechanism (2), a filtering mechanism (3), a testing mechanism and a pressure regulating unit (9); The air source (1) is used to provide high-pressure air; The drying mechanism (2) and the filtering mechanism (3) are sequentially connected to the outlet of the air source (1); the drying mechanism (2) is used to dry the high-pressure air; and the filtering mechanism (3) is used to filter the dried high-pressure air. The test mechanism comprises an injector tool (6) and a test assembly, wherein the injector tool (6) is used to install a hydrogen injector (1206), and the hydrogen injector (1206) is connected to the filter mechanism (3) and the pressure regulating unit (9) via the injector tool (6), respectively; and the test assembly comprises a first pressure detection unit (7) provided on a connecting pipeline between the injector tool (6) and the filter mechanism (3), and a second pressure detection unit (8) and a flow detection unit (10) provided on a connecting pipeline between the injector tool (6) and the pressure regulating unit (9).

2. The hydrogen injector testing device according to claim 1, characterized in that: The air source (1) comprises a screw air compressor.

3. The hydrogen injector testing device according to claim 1, characterized in that: The drying mechanism (2) comprises a cold dryer and a micro-heat absorption dryer which are connected in sequence along the flow direction of the high-pressure gas.

4. The hydrogen injector testing device according to claim 1, characterized in that: The filtering mechanism (3) comprises a nine-stage filter.

5. The hydrogen injector testing device according to claim 1, characterized in that: A pressure reducing valve (5) is provided on the connecting pipeline between the ejector tooling (6) and the filter mechanism (3), and the first pressure detection unit (7) is provided downstream of the pressure reducing valve (5) along the flow direction of the high-pressure gas.

6. The hydrogen injector testing device according to claim 1, characterized in that: The pressure regulating unit (9) comprises a back pressure valve.

7. The hydrogen injector testing device according to claim 1, characterized in that: An exhaust muffler (11) is provided at the gas outlet of the pressure regulating unit (9).

8. The hydrogen injector testing device according to any one of claims 1 to 7, characterized in that: The testing mechanisms are divided into multiple groups, and the multiple groups of testing mechanisms are arranged in parallel.

9. The hydrogen injector testing device according to claim 8, characterized in that: It also includes a plurality of first controllers (12) and second controllers (15), wherein the first controllers (12) correspond to the test mechanisms one by one, and each first controller (12) is connected to the hydrogen injector (1206) installed in the corresponding test mechanism; The second controller (15) is connected to each of the first pressure detection units (7), each of the second pressure detection units (8), and each of the flow detection units (10), respectively.

10. The hydrogen injector testing device according to claim 9, characterized in that: The system further comprises a host computer (13) and a plurality of current acquisition units (14), wherein the current acquisition units (14) correspond one to one with the hydrogen injectors (1206), the host computer (13) is respectively connected to each of the first controllers (12), the second controller (15) and each of the current acquisition units (14), and each of the current acquisition units (14) is used to acquire the driving current of the corresponding hydrogen injector (1206).

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