High-pressure high-frequency hydrogen ejector

Abstract

The invention belongs to the technical field of fuel cells, and particularly relates to a high-pressure and high-frequency hydrogen injector which comprises a hydrogen injector body and an electromagnetic injection valve, a gas inlet channel and an injection channel are formed in the hydrogen injector body, and plug-in mounting channels formed in the hydrogen injector body are communicated with the gas inlet channel and the injection channel. The electromagnetic injection valve comprises an electromagnetic assembly and a nozzle pipe connected to the bottom of the electromagnetic assembly, the lower side face of the electromagnetic assembly is attached to the outer side face of the hydrogen injector body in a sealed mode, an inlet of the electromagnetic injection valve is formed in the lower side face of the valve port base and communicates with the air inlet channel, and an outlet of the electromagnetic injection valve is located in the bottom of the nozzle pipe. According to the hydrogen injector, the structure is more reasonable, the communicating path of the air inlet and the exhaust channel is shorter, the reaction speed of the hydrogen injector body is higher, and therefore more accurate hydrogen injection control is achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of fuel cells, and particularly relates to a high-pressure high-frequency hydrogen injector. Background Art

[0002] As a core component for supplying hydrogen to the anode of a fuel cell, the performance of the hydrogen injector directly affects the efficiency and stability of the fuel cell stack. There are three problems in existing fuel cell injectors. First, there are too many pipeline opening paths, the pipeline length increases, and the hydrogen delivery path is too long, resulting in a volume effect, leading to supply delay and injection quantity deviation under high-frequency start-stop conditions. Second, the response speed of existing fuel injectors depends on the flow regulation sensitivity of the injection valve, and the response speed of existing injection valves is difficult to achieve the millisecond-level response required for variable load of on-vehicle fuel cells, restricting the dynamic control accuracy. Third, the multi-way connection structure doubles the number of sealing nodes, and the risk of hydrogen leakage and maintenance cost increase simultaneously. For example, in a hydrogen injector with the patent publication number CN209822786U, although attempts are made to improve the response speed by optimizing the structure of the electromagnetic component, when manufacturing a fuel cell injector with a large flow rate, the additional intake pipeline increases the pipeline length, and the system hysteresis problem caused by pipeline redundancy has not been solved. At the same time, the additional intake pipeline is not conducive to the utilization of the internal space of the hydrogen injector body. To increase the hydrogen flow rate, additional electromagnetic injection valves will lead to an increase in the product structure. Therefore, there is an urgent need to develop an integrated high-pressure high-frequency hydrogen injector to improve the dynamic response characteristics while simplifying the pipeline layout. Summary of the Invention

[0003] In view of the above problems, the present invention provides a high-pressure high-frequency hydrogen injector, which effectively solves the problems in the prior art that the pipeline structure is not suitable for the hydrogen injector body with a large flow rate, and some pipeline structures and layouts are unreasonable, resulting in an increase in pipeline length, thereby causing hydrogen supply delay and a decrease in the sensitivity and response of the fuel injector.

[0004] To achieve the above object, the technical solution adopted by the present invention is as follows: A high-pressure high-frequency hydrogen injector includes a hydrogen injector body and an electromagnetic injection valve. An intake channel and an injection channel are provided on the hydrogen injector body. A plurality of insertion channels are opened on the hydrogen injector body, and the insertion channels communicate with both the intake channel and the injection channel. The electromagnetic injection valve includes an electromagnetic component and a nozzle tube connected to the bottom of the electromagnetic component. The lower side of the electromagnetic component is in sealing fit with the outer side of the hydrogen injector body. The inlet of the electromagnetic injection valve is provided on the lower side of the electromagnetic component, and the inlets of the electromagnetic injection valve communicate with the intake channel through the insertion channels. The outlet of the electromagnetic injection valve is located at the bottom of the nozzle tube, and the outlets of the electromagnetic injection valve are respectively connected to the injection channel. The lower side of the nozzle tube is in sealing fit with the inner wall of the insertion channel. In the present invention, there is no need to additionally open a connection channel. At the same time, the design of the inlet and outlet of the electromagnetic component facilitates the passage of a large amount of hydrogen, and the distance between the inlet and outlet of the solenoid valve is shortened, enabling a more high-frequency and rapid response action.

[0005] Further, one end of the nozzle tube connected to the electromagnetic component is a conical platform. By setting the conical platform structure, when the inner diameter of the insertion channel remains the same, it does not affect the intake of the inlet of the electromagnetic injection valve, simplifying the hole-opening process on the hydrogen injector body.

[0006] Further, the electromagnetic component includes a valve port seat and a coil part. An exhaust channel is opened in the middle of the valve port seat, and an air inlet surrounding the exhaust channel is opened on the valve port seat. The upper part of the valve port seat is connected to the coil part. Through the surrounding design of the air inlet, the distance between the air inlet and the exhaust channel is shortened, improving the sensitivity in the high-frequency opening and closing state.

[0007] Further, the coil part includes a housing. An electromagnetic coil is arranged inside the housing. A plugging component is arranged on the upper part of the housing, and the plugging component is connected to the electromagnetic coil. An armature core is arranged above the electromagnetic coil inside. The upper part of the armature core is connected to the housing. An armature is arranged below the electromagnetic coil inside. A spring is arranged between the armature core and the armature. A sealing gasket is arranged at the lower part of the armature. A magnetic conductive plate is arranged on the lower side of the electromagnetic coil, and the edge of the magnetic conductive plate is connected to the inner wall of the housing. The sealing gasket abuts against the upper end of the exhaust channel. Under normal conditions, the elastic potential energy of the spring makes the sealing gasket abut against the exhaust channel to cut off the exhaust channel from the air inlet to achieve sealing. By controlling the electromagnetic coil, the armature can be quickly driven to move, thereby realizing the quick opening and closing of the electromagnetic injection valve.

[0008] Further, the nozzle tube includes a direct connection tube and a nozzle. The upper end of the direct connection tube is integrally connected to the lower side of the electromagnetic assembly. The upper end of the nozzle is detachably connected to the direct connection tube. A nozzle sealing groove is provided on the nozzle, and an internal sealing ring is arranged in the nozzle sealing groove. By providing a detachable nozzle, it is convenient to replace the length of the nozzle, so that the nozzle tube is applicable to intake channels and injection channels with different spacing distances.

[0009] Further, an internally threaded tube is provided at the upper part of the housing. The upper part of the yoke is threadedly connected to the internally threaded tube. An internal hexagonal hole is provided at the upper end of the yoke. By providing the internal hexagonal hole, it is convenient to adjust the pre-tightening force of the spring between the yoke and the armature.

[0010] The plug-in assembly includes a plug-in part and a fixed gland connected to the lower part of the plug-in part. The fixed gland is sleeved and installed on the internally threaded tube. A snap ring groove is provided on the upper side surface of the yoke, and a snap ring is arranged in the snap ring groove. By providing the snap ring in cooperation with the fixed gland, the snap ring mounts the fixed gland and the plug-in part on the upper part of the housing.

[0011] Further, the intake channel and the injection channel are through holes horizontally provided in the hydrogen injector body. Internal threads are provided at both ends of the intake channel and the injection channel. Sealing threaded plugs are installed at one end of the intake channel and the injection channel respectively. By providing the internal threads, it is convenient for the connection and installation of the hydrogen injector body, and at the same time, the directions of the intake port and the outlet port of the hydrogen injector body can be adjusted.

[0012] Further, a plurality of counterbores are provided on the upper side surface of the hydrogen injector body. The electromagnetic injection valves are all arranged in the counterbores. A flange pressing plate is provided at the edge of the counterbore. The lower side surface of the flange pressing plate abuts against the upper side surface of the valve port seat. The flange pressing plate is detachably connected to the hydrogen injector body. By providing the flange pressing plate, the electromagnetic injection valves are clamped and fixed on the hydrogen injector body, and the installation is more convenient.

[0013] Further, a magnetic conductive sleeve is fitted on the inner wall of the electromagnetic coil, and a wear-resistant cloth is installed on the inner wall of the magnetic conductive sleeve. By providing the magnetic conductive sleeve and the wear-resistant cloth, the movement of the armature is facilitated, and at the same time, the wear-resistant cloth avoids the wear of the magnetic conductive sleeve.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] In the present invention, the inlet of the inserted electromagnetic assembly is directly connected to the insertion channel. The hydrogen injector body does not need to additionally open a connection channel, reducing the processing steps of the hydrogen injector body. The design of the inlet and outlet of the electromagnetic assembly facilitates the passage of a large amount of hydrogen. At the same time, there is no need to additionally install a sealing component, reducing the leakage risk and making the structure more reasonable.

[0016] In the present invention, the air inlet is arranged around the exhaust passage, and the air inlet is communicated with the exhaust passage by the up and down movement of the gasket. The communication path is shorter, and the reaction speed of the hydrogen injector body is faster, so as to achieve more accurate hydrogen injection control.

[0017] The present invention can adapt to different models of products by configuring different numbers of electromagnetic injection valves. At the same time, the internal threads provided at both ends of the air inlet passage and the injection passage in the present invention can cooperate with the sealing thread plugs to achieve communication in different directions, adapt to different product structure layouts, and improve the space utilization rate of the product structure. Brief Description of the Drawings

[0018] Figure 1 is a schematic three-dimensional structure diagram of the present invention;

[0019] Figure 2 is a schematic cross-sectional structure diagram of the present invention;

[0020] Figure 3 is Figure 2 the enlarged view of part A in

[0021] Figure 4 is Figure 3 the enlarged view of part B in

[0022] Figure 5 is Figure 3 the enlarged view of part C in

[0023] In the figure: 1. Hydrogen injector body; 2. Electromagnetic injection valve; 3. Air inlet passage; 4. Injection passage; 5. Insertion passage; 21. Electromagnetic component; 211. Valve port seat; 212. Coil part; 2121. Shell; 2122. Electromagnetic coil; 2123. Plug-in component; 201. Plug-in part; 202. Fixed gland; 203. Circlip groove; 204. Circlip; 2124. Yoke iron; 2125. Armature; 2126. Spring; 2127. Gasket; 2128. Magnetic conductive plate; 2129. Internal thread pipe; 2120. Internal hexagonal hole; 213. Exhaust passage; 214. Air inlet; 22. Nozzle pipe; 221. Direct connection pipe; 222. Nozzle; 223. Nozzle sealing groove; 6. Internal thread; 7. Sealing thread plug; 8. Flange pressing plate; 9. Magnetic conductive sleeve; 10. Wear-resistant cloth. Detailed Description of the Invention

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0025] AsFigures 1-5 As shown in the figure, a high-pressure and high-frequency hydrogen injector includes a hydrogen injector body 1 and an electromagnetic injection valve 2. The hydrogen injector body 1 is in the shape of a cuboid. An intake passage 3 and an injection passage 4 are machined on the hydrogen injector body 1 by CNC. The intake passage 3 and the injection passage 4 are arranged in parallel, and the intake passage 3 is located above the injection passage 4. A plurality of insertion passages 5 are opened on the hydrogen injector body 1. The insertion passages 5 are vertically opened downward from the upper side surface of the hydrogen injector body 1. The insertion passages 5 are all communicated with the intake passage 3 and the injection passage 4. The electromagnetic injection valve 2 includes an electromagnetic component 21 and a nozzle tube 22 connected to the bottom of the electromagnetic component 21. The lower side surface of the electromagnetic component 21 is fitted and sealed with the upper side surface of the hydrogen injector body 1. The inlet of the electromagnetic injection valve 2 is arranged on the lower side surface of the electromagnetic component 21. The inlets of the electromagnetic injection valve 2 are all communicated with the intake passage 3 through the insertion passages 5. The outlet of the electromagnetic injection valve 2 is located at the bottom of the nozzle tube 22. The outlets of the electromagnetic injection valve 2 are respectively communicated with the injection passage 4. The lower side surface of the nozzle tube 22 is hermetically fitted with the inner wall of the insertion passage 5.

[0026] As Figure 3 shown in the figure, in this embodiment, one end of the nozzle tube 22 connected to the electromagnetic component 21 is a conical platform. The outer diameter of the upper end of the nozzle tube 22 gradually decreases from bottom to top, so as to increase the gap between the nozzle tube 22 and the insertion passage 5 and meet the large-capacity passage of hydrogen.

[0027] As Figure 2 、 Figure 3 and Figure 4 shown in the figure, in this embodiment, the electromagnetic component 21 includes a valve port seat 211 and a coil part 212. An exhaust passage 213 is opened in the middle of the valve port seat 211. The exhaust passage 213 is opened from top to bottom. An air inlet 214 surrounding the exhaust passage 213 is opened on the valve port seat 211. The air inlet 214 is a plurality of arc-shaped waist-shaped holes with the exhaust passage 213 as the center. A sunken cavity is opened on the upper side surface of the valve port seat 211. An internal connection thread is provided on the inner side surface of the sunken cavity. The lower part of the coil part 212 is threadedly connected to the sunken cavity. An electromagnetic component sealing groove is opened on the lower side surface of the valve port seat 211. The electromagnetic component sealing groove is opened around the edge of the valve port seat 211. By installing a sealing ring in the electromagnetic component sealing groove, the electromagnetic injection valve 2 is sealed when installed on the hydrogen injector body 1.

[0028] As Figure 3 、 Figure 4 and Figure 5As shown, in this embodiment, the coil part 212 includes a housing 2121. The outer side surface of the lower part of the housing 2121 is provided with an external connection thread, which is matched with the internal connection thread opened on the inner side surface of the sinking cavity. An electromagnetic coil 2122 is installed inside the housing 2121. The upper part of the housing 2121 is provided with a plug-in component 2123, and the plug-in component 2123 is electrically connected to the electromagnetic coil 2122. The center of the electromagnetic coil 2122 is a longitudinal cylindrical hole. An armature 2124 is arranged above the electromagnetic coil 2122. The upper part of the armature 2124 is connected to the housing 2121. An armature 2125 is arranged below the electromagnetic coil 2122. A spring 2126 is arranged between the armature 2124 and the armature 2125. A spring groove is opened on the upper side surface of the armature 2125. The lower end of the spring 2126 is inserted and abutted against the bottom of the spring groove. The upper end of the spring 2126 abuts against the lower end of the armature 2124. A sealing gasket groove is opened in the lower part of the armature 2125, and a sealing gasket 2127 is clamped and installed in the sealing gasket groove. A magnetic conduction plate 2128 is attached to the lower side surface of the electromagnetic coil 2122. The edge of the magnetic conduction plate 2128 is threadedly connected to the inner wall of the housing 2121. A round hole is opened in the center of the magnetic conduction plate 2128. A convex platform is arranged around the upper end of the exhaust passage 213, and the diameter of the convex platform is smaller than the diameter of the sealing gasket 2127. In the state where the electromagnetic gasket is not powered on, affected by the elastic force of the spring 2126, the lower end of the armature 2125 passes through the round hole in the center of the magnetic conduction plate 2128, so that the sealing gasket 2127 abuts against the upper end of the exhaust passage 213. At this time, the exhaust passage 213 is in a closed state.

[0029] As Figure 3 shown, in this embodiment, the nozzle tube 22 includes a direct connection tube 221 and a nozzle 222. The upper end of the direct connection tube 221 is integrally connected to the lower side surface of the electromagnetic component 21. The upper end of the nozzle 222 is detachably connected to the direct connection tube 221 by a thread. The threaded connection between the nozzle 222 and the direct connection tube 221 can be sealed by setting a sealing ring. A nozzle sealing groove 223 is opened on the nozzle 222. The inner sealing groove is an annular groove opened around the outer side surface of the nozzle 222, and an internal sealing ring is arranged in the nozzle sealing groove 223.

[0030] As Figure 5 shown, in this embodiment, an internally threaded tube 2129 is integrally connected to the upper part of the housing 2121. The upper part of the armature 2124 is threadedly connected to the internally threaded tube 2129. An internal hexagonal hole 2120 is opened at the upper end of the armature 2124.

[0031] In this embodiment, the plugging component 2123 includes a plugging portion 201 and a fixed gland 202 connected to the lower part of the plugging portion 201. The plugging portion 201 includes a component housing 2121 and a plugging member located inside the component housing 2121. The component housing 2121 is integrally connected to the fixed gland 202. The fixed gland 202 fits on the upper side surface of the housing 2121. The middle of the fixed gland 202 is a sleeve with a diameter larger than that of the internal threaded pipe 2129. The sleeve in the middle of the fixed gland 202 is sleeved on the internal threaded pipe 2129. A snap ring groove 203 is formed on the upper side surface of the yoke 2124, and a snap ring 204 is arranged in the snap ring groove 203. The fixed gland 202 is made to fit and press on the upper side surface of the housing 2121 through the snap ring 204.

[0032] In this embodiment, the intake passage 3 and the injection passage 4 are through holes horizontally penetrating through the hydrogen injector body 1. Internal threads 6 are provided at both ends of the intake passage 3 and the injection passage 4. Sealed threaded plugs 7 are installed at the left ends of both the intake passage 3 and the injection passage 4. At this time, the connectors connecting the hydrogen injector body 1 can all be connected to the hydrogen injector body 1 through the internal threads 6 opened on the right side. In some embodiments, the sealed threaded plugs 7 installed on the intake passage 3 and the injection passage 4 can also be arranged one on the left and one on the right respectively, so that the internal threads 6 connecting the hydrogen injector body 1 are located on both sides of the hydrogen injector body 1.

[0033] In this embodiment, a plurality of counterbores are formed on the upper side surface of the hydrogen injector body 1. The number of counterbores corresponds to the number of electromagnetic injection valves 2 installed. The electromagnetic injection valves 2 are all arranged in the counterbores. A flange pressing plate 8 is arranged at the edge of the counterbore. The lower side surface of the flange pressing plate 8 abuts against the upper side surface of the valve port seat 211. Bolt holes surrounding the counterbores are formed on the upper side surface of the hydrogen injection main body. The flange pressing plate 8 and the hydrogen injector body 1 are detachably connected through bolts passed through.

[0034] In this embodiment, a magnetic conducting sleeve 9 is adhesively fixed to the inner wall of the electromagnetic coil 2122, and an abrasion-resistant cloth 10 is adhesively fixed to the inner wall of the magnetic conducting sleeve 9.

[0035] When the present invention is operating, the hydrogen in the intake passage 3 passes through the upper part of the insertion passage 5 through the intake port 214 and enters the sunken cavity starting from the upper side surface of the valve port seat 211. When the electromagnetic coil 2122 is in an energized state, the yoke 2124 generates an attractive force on the armature 2125, causing the armature 2125 to slide upward, so that the hydrogen passing through the intake port 214 all enters the exhaust passage 213. At this time, the intake passage 3 and the injection passage 4 are in a connected state, and the injection passage 4 outputs a quantitatively injected hydrogen.

[0036] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A high-pressure high-frequency hydrogen injector, characterized in that: It includes a hydrogen injector body and an electromagnetic injection valve. An intake passage and an injection passage are provided on the hydrogen injector body. A plurality of insertion passages are formed in the hydrogen injector body, and the insertion passages communicate with both the intake passage and the injection passage. The electromagnetic injection valve includes an electromagnetic component and a nozzle tube connected to the bottom of the electromagnetic component. The lower side of the electromagnetic component is in sealing fit with the outer side of the hydrogen injector body. The inlet of the electromagnetic injection valve is arranged on the lower side of the electromagnetic component, and the inlet of the electromagnetic injection valve communicates with the intake passage through the insertion passage. The outlet of the electromagnetic injection valve is located at the bottom of the nozzle tube, and the outlet of the electromagnetic injection valve is respectively connected to the injection passage. The lower side surface of the nozzle tube is in sealing fit with the inner wall of the insertion passage.

2. The high-pressure high-frequency hydrogen injector according to claim 1, characterized in that: One end of the joint between the nozzle tube and the electromagnetic component is a tapered table.

3. The high-pressure high-frequency hydrogen injector according to claim 1, wherein: The electromagnetic component includes a valve port seat and a coil part. An exhaust passage is formed in the middle of the valve port seat, and an air inlet surrounding the exhaust passage in a circumferential manner is formed on the valve port seat. The upper part of the valve port seat is connected to the coil part.

4. The high-pressure high-frequency hydrogen injector according to claim 3, wherein: The coil part includes a housing. An electromagnetic coil is arranged inside the housing. A plugging component is arranged on the upper part of the housing, and the plugging component is connected to the electromagnetic coil. An armature core is arranged above the electromagnetic coil inside. The upper part of the armature core is connected to the housing. An armature is arranged below the electromagnetic coil inside. A spring is arranged between the armature core and the armature. A sealing gasket is arranged at the lower part of the armature. A magnetic conductive plate is arranged on the lower side surface of the electromagnetic coil, and the edge of the magnetic conductive plate is connected to the inner wall of the housing. The sealing gasket abuts against the upper end of the exhaust passage.

5. The high-pressure high-frequency hydrogen injector according to claim 2, characterized in that: The nozzle tube includes a direct connection tube and a nozzle. The upper end of the direct connection tube is integrally connected to the lower side surface of the electromagnetic component. The upper end of the nozzle is detachably connected to the direct connection tube. A nozzle sealing groove is formed in the nozzle, and an internal sealing ring is arranged in the nozzle sealing groove.

6. The high-voltage high-frequency hydrogen injector according to claim 4, wherein: An internally threaded tube is arranged on the upper part of the housing. The upper part of the armature core is threadedly connected to the internally threaded tube, and an internal hexagonal hole is formed at the upper end of the armature core.

7. The high-pressure high-frequency hydrogen injector according to claim 6, wherein: The plugging component includes a plugging part and a fixed gland connected to the lower part of the plugging part. The fixed gland is sleeved and installed on the internally threaded tube. A snap ring groove is formed on the upper side surface of the armature core, and a snap ring is arranged in the snap ring groove.

8. The high-pressure high-frequency hydrogen injector according to claim 1, characterized in that: The intake passage and the injection passage are through holes horizontally formed in the hydrogen injector body. Internal threads are arranged at both ends of the intake passage and the injection passage, and a sealing threaded plug is installed at one end of both the intake passage and the injection passage.

9. The high-pressure high-frequency hydrogen injector according to claim 3, characterized in that: A plurality of counterbores are formed on the upper side surface of the hydrogen injector body. The electromagnetic injection valves are all arranged in the counterbores. A flange pressing plate is arranged at the edge of the counterbore. The lower side surface of the flange pressing plate abuts against the upper side surface of the valve port seat. The flange pressing plate is detachably connected to the hydrogen injector body.

10. The high-pressure high-frequency hydrogen injector according to claim 4, characterized in that: A magnetic conductive sleeve is arranged in a fitting manner on the inner wall of the electromagnetic coil, and a wear-resistant cloth is installed on the inner wall of the magnetic conductive sleeve.

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