Injector device, injector device control method and vehicle

Abstract

The present invention belongs to the field of valve technology, and discloses an injector device, an injector device control method and a vehicle. The injector device includes a valve body, a valve seat, a valve core assembly, a first electromagnetic coil and a second electromagnetic coil. The first electromagnetic coil is sleeved on the valve body. The first electromagnetic coil is energized to obtain magnetic force, which can overcome the large gas pressure on the upper end face of the valve core, so that the injector device can be applied to working conditions with large intake pressure. Then, the valve core can move upward in a first direction and block a through hole under the action of the first electromagnetic coil. The second electromagnetic coil is located on the opening of the annular groove, and the opening of the through hole opened by the valve core can be adjusted by changing the magnitude of the input current, so that the amount of hydrogen entering can be accurately proportionally adjusted. The second electromagnetic coil can drive the moving iron core to slide downward in the first direction to keep the valve core away from the through hole. The through hole is in an open state, and provides corresponding amounts of hydrogen according to different working conditions of the hydrogen supply system to meet different power requirements.

Description

Technical Field

[0001] The present invention relates to the field of valve technology, and in particular to an injector device, an injector device control method and a vehicle. Background Art

[0002] As non-renewable energy sources such as fossil fuels are facing the danger of exhaustion, especially the impact on the environment cannot be ignored, the development and utilization of new energy sources has become an increasingly urgent requirement. Hydrogen is a new energy source. During the use of hydrogen fuel, the fuel cell hydrogen supply system needs to use a hydrogen injection valve to provide hydrogen to the fuel cell stack to adjust the amount of hydrogen entering the fuel cell stack to meet the different power requirements of the fuel cell.

[0003] In the existing hydrogen injection valve, an electromagnetic coil is arranged on the valve body, and the electromagnetic coil can generate electromagnetic suction force to attract the valve core to move to the corresponding position. The valve core and the valve body are connected by a reset spring. When the pressure of the continuously introduced hydrogen is high, the valve core moves downward under the action of the electromagnetic coil to open the hydrogen injection valve to inject hydrogen, and the reset spring is stretched. However, the electromagnetic coil is a switch-type electromagnetic coil used to control the gas injection of the hydrogen injection valve, and cannot adjust the gas injection flow of the hydrogen injection valve. At the same time, after hydrogen is continuously introduced into the hydrogen injection valve for a certain period of time, due to the high pressure of the introduced hydrogen, the hydrogen pressure at the upper end face of the valve core is much greater than the force of the spring, which will cause the valve core to be unable to move upward and the gas passage of the hydrogen injection valve to be unable to be closed.

[0004] Therefore, there is an urgent need for an injector device, an injector device control method and a vehicle to solve the above problems. Summary of the invention

[0005] According to one aspect of the present invention, the present invention provides an injector device that can accurately adjust the proportion of the amount of hydrogen entering to meet the different power requirements of the hydrogen supply system, and can overcome the large gas pressure on the upper end face of the valve core to move the valve core upward and block the through hole.

[0006] In order to solve the above problems existing in the prior art, the present invention adopts the following technical solutions:

[0007] An ejector device, comprising:

[0008] A valve body having a first chamber and a second chamber, an annular groove is formed on the outer circumference of the valve body, the depth of the annular groove gradually decreases along a first direction, an air inlet and an air outlet are provided on the valve body, the air inlet is connected to the first chamber, and the air outlet is connected to the second chamber;

[0009] A valve seat, disposed between the first chamber and the second chamber, the valve seat having a through hole;

[0010] A valve core assembly, comprising a moving iron core located in the first chamber and a valve core located in the second chamber, wherein the valve core is arranged below the valve seat, one end of the moving iron core is slidably arranged in the through hole and connected to the valve core, and the valve core is used to block the through hole;

[0011] a first electromagnetic coil, sleeved on the valve body, the first electromagnetic coil being capable of driving the moving iron core to slide upward along the first direction so that the valve core can block the through hole, and the through hole is in a closed state;

[0012] A second electromagnetic coil is sleeved on the valve body, and the second electromagnetic coil is located on the opening of the annular groove. The second electromagnetic coil can drive the moving iron core to slide downward along the first direction to make the valve core away from the through hole. The through hole is in an open state, and the first chamber is connected to the second chamber so that the gas passes through the first chamber, the through hole, the second chamber and the air outlet in sequence.

[0013] Preferably, the moving iron core and the top end of the valve body are spaced apart along the first direction.

[0014] Preferably, the injector device further comprises a shell, the shell is detachably connected to the valve body, and the shell is used to cover the first electromagnetic coil and the second electromagnetic coil.

[0015] Preferably, the inner diameter of the through hole is larger than the outer diameter of the slender rod portion of the moving iron core and smaller than the diameter of the end portion of the valve core.

[0016] Preferably, the injector device further comprises an elastic member, wherein the elastic member is sleeved on the valve core, one end of the elastic member is arranged at the bottom end of the valve body, and the other end of the elastic member is pressed against the valve core, and when the valve core closes the through hole, the elastic member is in a compressed state.

[0017] Preferably, a sealing member is provided on the valve core, and when the valve core closes the through hole, the sealing member is sandwiched between the valve core and the valve seat.

[0018] According to another aspect of the present invention, there is provided an injector device control method, which, through the implementation of the above-mentioned injector device, comprises:

[0019] S100: When no gas is passed into the valve body, the first electromagnetic coil and the second electromagnetic coil are powered off by default, the valve core is blocked in the through hole, and the through hole is in the closed state;

[0020] S200: When gas is introduced into the valve body, the first electromagnetic coil is first powered off, and then the second electromagnetic coil is powered on, the valve core slides downward along the first direction, the through hole is in the open state, and the gas passes through the first chamber, the through hole, the second chamber and the gas outlet hole in sequence;

[0021] S300: The first electromagnetic coil is energized, and the second electromagnetic coil is deenergized. The moving iron core slides upward along the first direction under the magnetic attraction of the first electromagnetic coil until the valve core is pressed against the valve seat, so that the through hole is in the closed state.

[0022] Preferably, S200 in the injector device control method is specifically:

[0023] S210: the first electromagnetic coil is powered off, and the gas pressure acts on the upper end surface of the valve core to separate the valve core from the valve seat;

[0024] S220: The second electromagnetic coil is energized, and the moving iron core slides downward in the first direction under the magnetic attraction of the second electromagnetic coil. The distance between the valve core and the valve seat can be freely adjusted. The valve core is in the open state, and the first chamber is connected to the second chamber. The gas in the first chamber passes through the through hole, the second chamber and the air outlet in sequence.

[0025] Preferably, the following is further included between S100 and S200:

[0026] S110: The first electromagnetic coil is energized, and gas is introduced into the first chamber. Under the magnetic attraction of the first electromagnetic coil, the moving iron core can press the valve core against the valve seat, and the through hole remains in the closed state.

[0027] According to yet another aspect of the present invention, a vehicle is provided, comprising the above-mentioned injector device.

[0028] The beneficial effects of the present invention are:

[0029] The present invention provides an injector device, in which the outer peripheral surface of the valve body is provided with an annular groove, and the valve body is provided with an air inlet and an air outlet, wherein the air inlet is connected to the first chamber, and the air outlet is connected to the second chamber. The valve seat has a through hole, through which the gas in the first chamber can enter the second chamber. The valve core assembly includes a moving iron core located in the first chamber and a valve core located in the second chamber, the valve core is arranged below the valve seat, one end of the moving iron core is slidably penetrated through the through hole and connected to the valve core, and the valve core can slide in a vertical direction and be used to block the through hole. The first electromagnetic coil is sleeved on the valve body, and the first electromagnetic coil is energized to obtain magnetic force, which can overcome the large gas pressure on the upper end face of the valve core, so that the injector device can be applied to the working condition with large intake pressure, and then the valve core can move upward in the first direction under the action of the first electromagnetic coil and block the through hole, so as to separate the first chamber from the second chamber. The second electromagnetic coil is sleeved on the valve body. The second electromagnetic coil is located on the opening of the annular groove. The opening of the through hole opened by the valve core can be adjusted by changing the size of the input current, and the amount of hydrogen entering can be accurately proportionally adjusted. It can be applied to high-load conditions where the hydrogen supply system requires a large gas flow rate. The second electromagnetic coil can drive the moving iron core to slide downward in the first direction to make the valve core away from the through hole. The through hole is in an open state, and provides a corresponding amount of hydrogen according to different working conditions of the hydrogen supply system to meet different power requirements. The first chamber is connected to the second chamber so that the gas passes through the first chamber, the through hole, the second chamber and the outlet hole in sequence, providing the hydrogen supply system of the fuel cell vehicle with hydrogen that meets the requirements of different working conditions, and can achieve proportional control of the gas injection flow rate under high-load conditions with higher gas pressure, and the valve core can block the through hole under the action of the first electromagnetic coil, and the response speed is fast.

[0030] The present invention provides a control method for an injector device. When gas is not passed into the valve body, the first electromagnetic coil and the second electromagnetic coil are powered off by default, the valve core is blocked in the through hole, and the through hole is in a closed state. After gas is passed into the valve body, the first electromagnetic coil is powered off first, and then the second electromagnetic coil is powered on. The valve core slides downward along the first direction, the through hole is in an open state, and the gas passes through the first chamber, the through hole, the second chamber and the air outlet in sequence. The first electromagnetic coil is powered on, and the second electromagnetic coil is powered off. The moving iron core slides upward along the first direction under the magnetic attraction of the first electromagnetic coil until the valve core is pressed against the valve seat, so that the through hole is in a closed state. The second electromagnetic coil can accurately adjust the proportion of the amount of hydrogen entering, and can be applied to high-load conditions where the hydrogen supply system requires a large gas flow rate, and provide corresponding hydrogen amounts according to different working conditions of the hydrogen supply system to meet different power requirements.

[0031] A vehicle provided by the present invention comprises the above-mentioned injector device, which is installed on the hydrogen supply system of a fuel cell vehicle. The vehicle can overcome the large gas pressure on the upper end surface of the valve core through the injector device, so that the injector device can be applied to working conditions with large intake pressure. Then, the valve core can move upward in a first direction and block the through hole under the action of a first electromagnetic coil, thereby improving the response speed of the valve core in closing the through hole. At the same time, the amount of hydrogen entering can be accurately proportionally adjusted to provide the hydrogen supply system of the fuel cell vehicle with hydrogen that meets the requirements of different working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of the ejector device in a closed state according to an embodiment of the present invention;

[0033] Figure 2 It is a structural schematic diagram of the ejector device in an open state according to an embodiment of the present invention;

[0034] Figure 3 Flow chart of the ejector device control method in an embodiment of the present invention.

[0035] Reference numerals:

[0036] 1. Valve body; 11. First chamber; 12. Second chamber; 13. Annular groove; 14. Air inlet; 15. Air outlet;

[0037] 2. Valve seat; 21. Through hole;

[0038] 3. Valve core assembly; 31. Moving iron core; 32. Valve core;

[0039] 4. The first electromagnetic coil;

[0040] 5. The second electromagnetic coil;

[0041] 6. Shell;

[0042] 7. Elastic parts;

[0043] 8. Seals. DETAILED DESCRIPTION

[0044] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0045] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0047] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0048] Embodiment 1

[0049] In the existing hydrogen injection valve, an electromagnetic coil is arranged on the valve body, which can generate electromagnetic suction to attract the valve core to move to the corresponding position. The valve core and the valve body are connected by a reset spring. When the pressure of the continuously introduced hydrogen is relatively high, the valve core moves downward under the action of the electromagnetic coil to open the hydrogen injection valve to inject hydrogen, and the reset spring is stretched. However, the electromagnetic coil is a switch-type electromagnetic coil, which is used to control the gas injection of the hydrogen injection valve and cannot adjust the gas injection flow of the hydrogen injection valve. At the same time, after hydrogen is continuously introduced into the hydrogen injection valve for a certain period of time, due to the relatively high pressure of the introduced hydrogen, the hydrogen pressure on the upper end face of the valve core is much greater than the force of the spring, which will cause the valve core to be unable to move upward and the gas passage of the hydrogen injection valve to be unable to be closed. In this regard, the present embodiment provides an injector device, which can accurately adjust the amount of hydrogen entering in proportion to meet the different power requirements of the hydrogen supply system, and can overcome the relatively large gas pressure on the upper end face of the valve core to move the valve core upward and block the through hole.

[0050] like Figure 1-Figure 2As shown, in this embodiment, an injector device is provided, which includes a valve body 1, a valve seat 2, a valve core assembly 3, a first electromagnetic coil 4 and a second electromagnetic coil 5. The valve body 1 has a first chamber 11 and a second chamber 12, which can accommodate gas and provide hydrogen to the hydrogen supply system of a fuel cell vehicle. An annular groove 13 is provided on the outer peripheral surface of the valve body 1, and the groove depth of the annular groove 13 gradually decreases along the first direction. The first direction is the AB direction, that is, the cross-sectional area of ​​the annular groove 13 along the AB direction in the figure gradually decreases, which is used for magnetic isolation. An air inlet 14 and an air outlet 15 are provided on the valve body 1. Optionally, the number of the air inlet 14 and the air outlet 15 are both multiple to increase the air intake and air outlet of the injector device. The air inlet 14 is connected to the first chamber 11, and the air outlet 15 is connected to the second chamber 12. The valve seat 2 is disposed between the first chamber 11 and the second chamber 12 and is fixedly connected to the valve body 1. The valve seat 2 has a through hole 21, through which the gas in the first chamber 11 can enter the second chamber 12. The valve core assembly 3 includes a moving iron core 31 located in the first chamber 11 and a valve core 32 located in the second chamber 12. The valve core 32 is disposed below the valve seat 2. One end of the moving iron core 31 is slidably disposed in the through hole 21 and connected to the valve core 32. The valve core 32 can slide in the vertical direction and is used to block the through hole 21. The first electromagnetic coil 4 is a switch type electromagnet, which is sleeved on the valve body 1. The first electromagnetic coil 4 is energized to obtain magnetic force. The first electromagnetic coil 4 can drive the moving iron core 31 to slide upward in the first direction so that the valve core 32 can block the through hole 21. At this time, the through hole 21 is in a closed state. The wall thickness of the first electromagnetic coil 4 corresponding to the position of the valve body 1 is thinner, which is conducive to increasing the magnetic force, thereby improving the response speed of the valve core 32 to close the through hole 21, and can overcome the larger gas pressure on the upper end face of the valve core 32, so that the injector device can be used in working conditions with larger intake pressure, and then the valve core 32 can move upward in the first direction under the action of the first electromagnetic coil 4 and block the through hole 21, so as to separate the first chamber 11 and the second chamber 12.The second electromagnetic coil 5 is sleeved on the valve body 1. The second electromagnetic coil 5 is located on the opening of the annular groove 13. The second electromagnetic coil 5 is proportional. The cross-sectional area of ​​the annular groove 13 gradually decreases along the first direction, so that the current and magnetic force of the second electromagnetic coil 5 have a linear relationship. The opening of the through hole 21 opened by the valve core 32 can be adjusted by changing the size of the current passed, and the amount of hydrogen entering can be accurately proportionally adjusted. It can be applied to high-load conditions where a large gas flow rate is required in the hydrogen supply system. The second electromagnetic coil 5 can drive the moving iron core 31 to slide downward along the first direction to make the valve core 3 2 is far away from the through hole 21, the through hole 21 is in an open state, and provides corresponding hydrogen amount according to different working conditions of the hydrogen supply system to meet different power requirements, the first chamber 11 is connected with the second chamber 12, so that the gas passes through the first chamber 11, the through hole 21, the second chamber 12 and the gas outlet 15 in sequence, and provides hydrogen meeting the requirements of different working conditions for the hydrogen supply system of the fuel cell vehicle, and can realize proportional control of the gas injection flow rate under high-load conditions with high gas pressure, and the valve core 32 can block the through hole 21 under the action of the first electromagnetic coil 4, and the response speed is fast.

[0051] Further, continue to refer to Figure 1-Figure 2 , the moving iron core 31 is spaced apart from the top of the valve body 1 along the first direction. Specifically, when the through hole 21 is in the closed state, the moving iron core 31 is spaced apart from the top of the valve body 1 by a certain distance, which can prevent the moving iron core 31 from being completely attracted to the valve body 1, thereby affecting the release sensitivity of the moving iron core 31 sliding downward along the first direction.

[0052] Further, continue to refer to Figure 1-Figure 2 The ejector device further comprises a housing 6, which is detachably connected to the valve body 1, and is used to cover the first electromagnetic coil 4 and the second electromagnetic coil 5. Specifically, the housing 6 and the valve body 1 are arranged to form two annular cavities for placing the first electromagnetic coil 4 and the second electromagnetic coil 5. The housing 6 has an internal thread, and the valve body 1 has an external thread. The housing 6 and the valve body 1 are threadedly matched. The housing 6 is detachable to facilitate the inspection and replacement of the first electromagnetic coil 4 and the second electromagnetic coil 5, and the operation is simple.

[0053] Further, continue to refer to Figure 1-Figure 2 The inner diameter of the through hole 21 is larger than the outer diameter of the slender rod of the moving iron core 31 and smaller than the diameter of the end of the valve core 32. Specifically, the maximum diameter of the valve core 32 is larger than the inner diameter of the through hole 21, so as to prevent the valve core 32 from leaking when blocking the through hole 21, and the sealing effect is good. In addition, the through hole 21 is used for the circulation of gas, and the outer diameter of the moving iron core 31 is smaller than the inner diameter of the through hole 21, so as to reduce the influence on the gas flow cross section of the through hole 21.

[0054] Further, continue to refer to Figure 1-Figure 2The injector device further comprises an elastic member 7, which is sleeved on the valve core 32, one end of the elastic member 7 is arranged at the bottom end of the valve body 1, and the other end of the elastic member 7 is pressed against the valve core 32. The elastic member 7 applies a force to the valve core 32 to cause the injector device to close, that is, the valve core 32 blocks the through hole 21 under the action of the elastic member 7 and the second electromagnetic coil 5. When the valve core 32 closes the through hole 21, the elastic member 7 is in a compressed state.

[0055] Further, continue to refer to Figure 1-Figure 2 , a sealing member 8 is provided on the valve core 32. When the valve core 32 closes the through hole 21, the sealing member 8 is sandwiched between the valve core 32 and the valve seat 2. Specifically, a sealing member 8 is provided on the upper end surface of the valve core 32. The sealing member 8 is made of an elastic material. When the through hole 21 is in a closed state, the valve core 32 is pressed against the valve seat 2. The sealing member 8 is used to reduce the impact and wear of the valve core 32 on the valve seat 2 and ensure the sealing performance of the through hole 21.

[0056] Embodiment 2

[0057] This embodiment provides an ejector device control method, such as Figure 3 As shown, through the implementation of the above-mentioned injector device, the injector device control method includes:

[0058] S100: When no gas is passed into the valve body 1, the first electromagnetic coil 4 and the second electromagnetic coil 5 are powered off by default, the valve core 32 is blocked in the through hole 21, and the through hole 21 is in a closed state.

[0059] When the injector device is not ventilated, the first chamber 11 and the second chamber 12 are both at atmospheric pressure and there is no pressure difference between the two. The valve core 32 is pressed against the valve seat 2 under the action of the spring force and blocks the through hole 21, keeping the through hole 21 in a closed state.

[0060] S110: The first electromagnetic coil 4 is energized, and gas is introduced into the first chamber 11. The moving iron core 31 can make the valve core 32 press against the valve seat 2 under the magnetic attraction of the first electromagnetic coil 4, and the through hole 21 remains closed.

[0061] When the injector device is ventilated, the first chamber 11 is connected to the external gas source, which provides a continuous supply of hydrogen. The hydrogen enters the first chamber 11 from the air inlet 14, and the first electromagnetic coil 4 is energized. The second electromagnetic coil 5 is still in a power-off state. The first electromagnetic coil 4 is energized before the intake pressure increases to prevent the through hole 21 from being opened and then closed to cause unnecessary leakage. When the working pressure of hydrogen is relatively high, that is, the hydrogen supply system of the fuel cell vehicle is in a high-load condition, the gas force on the upper end face of the valve core 32 is much greater than the spring force, and the moving iron core 31 is subjected to the magnetic attraction of the first electromagnetic coil 4. At this time, the combined force of the magnetic attraction and the spring force is greater than the gas force, and the through hole 21 is always in a closed state.

[0062] S200: When gas is introduced into the valve body 1, the first electromagnetic coil 4 is first de-energized, and then the second electromagnetic coil 5 is energized, the valve core 32 slides downward along the first direction, the through hole 21 is in an open state, and the gas passes through the first chamber 11, the through hole 21, the second chamber 12 and the air outlet 15 in sequence.

[0063] Specifically, S200 includes steps S210-S220.

[0064] S210: The first electromagnetic coil 4 is de-energized, and the gas pressure acts on the upper end surface of the valve core 32 to separate the valve core 32 from the valve seat 2.

[0065] When the injector device needs to supply gas to the hydrogen supply system, the first electromagnetic coil 4 is first powered off. After the power is off, the gas pressure in the first chamber 11 is located on the upper end surface of the valve core 32 and drives the valve core 32 to slide downward along the first direction. The through hole 21 is opened, and the first chamber 11 and the second chamber 12 are connected. The gas pressure in the second chamber 12 increases, and the gas pressure on the upper end surface of the valve core 32 decreases due to the reduction of gas. Then, the gas pressure on the upper and lower end surfaces of the valve core 32 will tend to be balanced, which can meet the requirement of the injector device with smaller magnetic force.

[0066] S220: The second electromagnetic coil 5 is energized, and the moving iron core 31 slides downward along the first direction under the magnetic attraction of the second electromagnetic coil 5. The distance between the valve core 32 and the valve seat 2 can be freely adjusted. The valve core 32 is in an open state, and the first chamber 11 is connected to the second chamber 12. The gas in the first chamber 11 passes through the through hole 21, the second chamber 12 and the air outlet 15 in sequence.

[0067] A fixed current is passed through the second electromagnetic coil 5, and the moving iron core 31 is subjected to a downward force. When the magnetic force is balanced with the spring force and the unbalanced force of the gas, the valve core 32 can be stabilized at a certain position in the second chamber 12, so that the injector device can provide a fixed gas flow rate of hydrogen to the hydrogen supply system.

[0068] S300: the first electromagnetic coil 4 is energized, the second electromagnetic coil 5 is deenergized, and the moving iron core 31 slides upward along the first direction under the magnetic attraction of the first electromagnetic coil 4 until the valve core 32 is pressed against the valve seat 2, so that the through hole 21 is in a closed state.

[0069] By changing the current applied to the second electromagnetic coil 5 to change the magnetic force on the moving iron core 31, the stroke of the valve core 32 can be changed and the opening of the valve core 32 can be adjusted, thereby changing the gas injection flow rate of the injector device. During the process of the injector device continuously supplying gas to the hydrogen supply system, it is not necessary to energize the first electromagnetic coil 4, but it is necessary to energize the second electromagnetic coil 5. Since the PWM (Pulse Width Modulation) driving mode is adopted and the equivalent current is small, it will not generate a large amount of heat and has high reliability. When the injector device needs to stop supplying gas, the second electromagnetic coil 5 is powered off and the first electromagnetic coil 4 is powered on. The moving iron core 31 slides upward in the first direction under the magnetic attraction of the first electromagnetic coil 4 until the valve core 32 is pressed against the valve seat 2, which can improve the response speed of the injector device to close the valve. Because the injector device can realize stepless regulation of the flow of hydrogen, there are not many cases in which the gas supply needs to be completely stopped during the working process, so there are not many cases in which the first electromagnetic coil 4 is continuously powered, which will not cause serious heating and excessive energy consumption.

[0070] The control method of the ejector device provided in this embodiment is that when no gas is passed into the valve body 1, the first electromagnetic coil 4 and the second electromagnetic coil 5 are powered off by default, the valve core 32 is blocked in the through hole 21, and the through hole 21 is in a closed state. When gas is passed into the valve body 1, the first electromagnetic coil 4 is powered off first, and then the second electromagnetic coil 5 is powered on, the valve core 32 slides downward along the first direction, the through hole 21 is in an open state, and the gas passes through the first chamber 11, the through hole 21, the second chamber 12 and the air outlet 15 in sequence. The first electromagnetic coil 4 is powered on, the second electromagnetic coil 5 is powered off, and the moving iron core 31 slides upward along the first direction under the magnetic attraction of the first electromagnetic coil 4 until the valve core 32 is pressed against the valve seat 2, so that the through hole 21 is in a closed state. The second electromagnetic coil 5 can accurately adjust the proportion of the amount of hydrogen entering, and can be applied to high-load conditions where the hydrogen supply system requires a large gas flow rate, and provide corresponding hydrogen amounts according to different working conditions of the hydrogen supply system to meet different power requirements. The first chamber 11 is connected to the second chamber 12, so that the gas passes through the first chamber 11, the through hole 21, the second chamber 12 and the outlet 15 in sequence, providing the hydrogen supply system of the fuel cell vehicle with hydrogen that meets the requirements of different working conditions, and can achieve proportional control of the gas injection flow rate under high-load conditions with higher gas pressure, and the valve core 32 can block the through hole 21 under the action of the first electromagnetic coil 4, and the response speed is fast.

[0071] Embodiment 3

[0072] The present embodiment provides a vehicle, comprising the above-mentioned injector device, the vehicle is a fuel cell vehicle, and the injector device is installed on the hydrogen supply system of the fuel cell vehicle. The vehicle can overcome the large gas pressure on the upper end surface of the valve core 32 through the injector device, so that the injector device can be used in working conditions with large intake pressure, and then the valve core 32 can move upward in the first direction under the action of the first electromagnetic coil 4 and block the through hole 21, thereby improving the response speed of the valve core 32 in closing the through hole 21, and at the same time, the amount of hydrogen entering can be accurately proportionally adjusted to provide the hydrogen supply system of the fuel cell vehicle with hydrogen that meets the requirements of different working conditions.

[0073] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. An ejector device, characterized in that: include: A valve body (1) having a first chamber (11) and a second chamber (12); an annular groove (13) is provided on the outer peripheral surface of the valve body (1); the groove depth of the annular groove (13) gradually decreases downward along a first direction, the first direction being a vertical direction; an air inlet (14) and an air outlet (15) are provided on the valve body (1); the air inlet (14) is communicated with the first chamber (11), and the air outlet (15) is communicated with the second chamber (12); A valve seat (2) is arranged between the first chamber (11) and the second chamber (12), the valve seat (2) having a through hole (21); A valve core assembly (3), comprising a moving iron core (31) located in the first chamber (11) and a valve core (32) located in the second chamber (12), wherein the valve core (32) is arranged below the valve seat (2), one end of the moving iron core (31) is slidably arranged in the through hole (21) and connected to the valve core (32), and the valve core (32) is used to block the through hole (21); a first electromagnetic coil (4) sleeved on the valve body (1), the first electromagnetic coil (4) being capable of driving the moving iron core (31) to slide upwards along the first direction so that the valve core (32) can block the through hole (21), and the through hole (21) is in a closed state; a second electromagnetic coil (5) sleeved on the valve body (1), the second electromagnetic coil (5) being located on the opening of the annular groove (13), the second electromagnetic coil (5) being capable of driving the movable iron core (31) to slide downward along the first direction so that the valve core (32) is away from the through hole (21), the through hole (21) being in an open state, the first chamber (11) being connected to the second chamber (12), so that gas passes through the first chamber (11), the through hole (21), the second chamber (12) and the gas outlet (15) in sequence; The injector device further comprises an elastic member (7), wherein the elastic member (7) is sleeved on the valve core (32), one end of the elastic member (7) is arranged at the bottom end of the valve body (1), and the other end of the elastic member (7) is tightly pressed against the valve core (32); when the valve core (32) closes the through hole (21), the elastic member (7) is in a compressed state.

2. The ejector device according to claim 1, characterized in that The moving iron core (31) and the top end of the valve body (1) are arranged at intervals along the first direction.

3. The ejector device according to claim 1, characterized in that The injector device further comprises a housing (6), wherein the housing (6) is detachably connected to the valve body (1), and the housing (6) is used to cover the first electromagnetic coil (4) and the second electromagnetic coil (5).

4. The ejector device according to claim 1, characterized in that The inner diameter of the through hole (21) is larger than the outer diameter of the slender rod portion of the moving iron core (31) and smaller than the diameter of the end portion of the valve core (32).

5. The ejector device according to any one of claims 1 to 4, characterized in that: A sealing member (8) is provided on the valve core (32); when the valve core (32) closes the through hole (21), the sealing member (8) is sandwiched between the valve core (32) and the valve seat (2).

6. A method for controlling an ejector device, characterized in that: By implementing the ejector device according to any one of claims 1 to 5, the ejector device control method comprises: S100: When no gas is passed into the valve body (1), the first electromagnetic coil (4) and the second electromagnetic coil (5) are powered off by default, the valve core (32) is blocked in the through hole (21), and the through hole (21) is in the closed state; S200: When gas is introduced into the valve body (1), the first electromagnetic coil (4) is first powered off, and then the second electromagnetic coil (5) is powered on, the valve core (32) slides downward along the first direction, the through hole (21) is in the open state, and the gas passes through the first chamber (11), the through hole (21), the second chamber (12), and the gas outlet (15) in sequence; S300: The first electromagnetic coil (4) is energized, the second electromagnetic coil (5) is de-energized, and the moving iron core (31) slides upward along the first direction under the magnetic attraction of the first electromagnetic coil (4) until the valve core (32) is pressed against the valve seat (2), so that the through hole (21) is in the closed state.

7. The method for controlling an ejector device according to claim 6, wherein: S200 in the injector device control method is specifically as follows: S210: the first electromagnetic coil (4) is powered off, and the gas pressure acts on the upper end surface of the valve core (32), so that the valve core (32) is separated from the valve seat (2); S220: The second electromagnetic coil (5) is energized, and the moving iron core (31) slides downward along the first direction under the magnetic attraction of the second electromagnetic coil (5). The distance between the valve core (32) and the valve seat (2) can be freely adjusted. The valve core (32) is in the open state, and the first chamber (11) is connected to the second chamber (12). The gas in the first chamber (11) passes through the through hole (21), the second chamber (12) and the air outlet (15) in sequence.

8. The method for controlling an ejector device according to claim 6, wherein: Also included between S100 and S200: S110: The first electromagnetic coil (4) is energized, and gas is then introduced into the first chamber (11). Under the magnetic attraction of the first electromagnetic coil (4), the moving iron core (31) can press the valve core (32) against the valve seat (2), and the through hole (21) remains in the closed state.

9. A vehicle, characterized in that: The invention comprises the ejector device according to any one of claims 1 to 5.

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