CN210567495U - Hydrogenation machine with flow regulation function - Google Patents
Hydrogenation machine with flow regulation function Download PDFInfo
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- CN210567495U CN210567495U CN201920780526.4U CN201920780526U CN210567495U CN 210567495 U CN210567495 U CN 210567495U CN 201920780526 U CN201920780526 U CN 201920780526U CN 210567495 U CN210567495 U CN 210567495U
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The utility model relates to a hydrogenation equipment technical field, it discloses hydrogenation machine with flow control function, be in including hydrogenation host computer, setting hydrogenation pipe-line system in the hydrogenation host computer, hydrogenation pipe-line system's output is provided with hydrogenation hose and hydrogenation rifle, last mass flow meter and the flow control valve of being provided with respectively of hydrogenation pipe-line system, the control system of hydrogenation host computer is connected respectively to mass flow meter and flow control valve. The utility model discloses a high accuracy control of hydrogenation machine flow, and the security is good.
Description
Technical Field
The utility model relates to a hydrogenation equipment technical field, concretely relates to hydrogenation machine with flow control function.
Background
The compressed hydrogen hydrogenation machine for automobile is a special equipment with metering and pricing functions, and is called hydrogenation machine for short, and is used for providing compressed hydrogen fuel or natural gas mixed hydrogen fuel filling service for automobile.
When a typical hydrogenation machine is a compressed hydrogen gas dispenser for automobiles (as shown in fig. 4) meeting the national standard GB/T31138-2014 in china, the pressure and flow rate of a hydrogen storage bottle in a fuel cell vehicle need to be controlled to ensure that the hydrogenation rate meets the GB/T31138 specification requirement of the compressed hydrogen gas dispenser for automobiles and the flow rate is within 60 g/s.
In order to quickly fill the fuel cell vehicle, the compressed hydrogen pressure of the hydrogenation station exceeds the rated storage pressure of the vehicle hydrogen storage bottle of the fuel cell vehicle. Such as a 35MPa hydrogen station, and the pressure before hydrogen filling is 45 MPa; for another example, the pressure before hydrogen filling is 87.5MPa in a 70MPa hydrogen station. If the speed (flow rate) of hydrogenation can not be effectively controlled, the hydrogen storage bottle on the fuel cell vehicle can be overloaded for storage, and dangerous accidents are caused.
In order to solve the problems, the prior art adopts a throttling orifice plate additionally arranged on an internal pipeline of a hydrogenation machine to control the hydrogenation speed (flow). However, the hydrogenation machine with the throttle orifice still has the following problems:
the conventional throttling orifice plate does not have a flow automatic regulating function and can only be fixedly regulated, a plurality of different throttling orifice plates can be installed in one hydrogenation machine to control flow, the installation of the plurality of different throttling orifice plates improves the complexity of the structure of the hydrogenation machine, on one hand, the equipment cost is improved, and on the other hand, the safety and the reliability of the equipment are reduced.
If an orifice plate assembly with a flow rate adjusting function (such as a rotary plate type orifice plate assembly) is adopted, although the automatic adjustment of the flow rate can be achieved, due to the structural problem of the orifice plate assembly, the accuracy of the flow rate adjustment is generally poor, the high-accuracy control of the flow rate cannot be realized, and the performance of the hydrogenation equipment is reduced.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model provides a hydrogenation machine with flow control function aims at realizing the high accuracy control of hydrogenation machine flow, and specific technical scheme is as follows:
the utility model provides a hydrogenation machine with flow control function, includes hydrogenation host computer, sets up hydrogenation pipe-line system in the hydrogenation host computer, hydrogenation pipe-line system's output is provided with hydrogenation hose and hydrogenation rifle, last mass flow meter and the flow control valve of being provided with respectively of hydrogenation pipe-line system, the control system of hydrogenation host computer is connected respectively to mass flow meter and flow control valve.
In the technical scheme, the pipeline of the hydrogenation machine is provided with the flow regulating valve which is connected with the control system, and the control system controls the flow regulating valve in real time according to the flow information of the mass flow meter, so that the accurate control of the flow is realized.
Preferably, a PID regulator is provided in the control system, and the control system realizes the flow regulation of the flow regulating valve through the PID regulator.
The control system adopts the PID regulator to regulate the flow, and has the advantages of good regulation stability, reliable work and the like.
As the preferred scheme of the utility model, still be provided with the orifice plate with adjustable as safe restriction usefulness on the hydrogenation pipe-line system.
Preferably, the control flow set by the flow regulating valve is smaller than the flow limiting flow set by the adjustable orifice plate.
The flow control valve capable of realizing high-precision regulation and control and the adjustable throttling orifice plate are combined for use, on one hand, the high-precision control advantage of the flow control valve is fully utilized, on the other hand, the reliable current limiting advantage of the adjustable throttling orifice plate is fully utilized, and the combination of the flow control valve and the adjustable throttling orifice plate greatly enhances the safety of the hydrogenation machine under high-precision flow regulation.
As a further improvement of the utility model, a breaking valve is arranged between the hydrogenation hose and the hydrogenation gun, a breaking valve safety inspection device for periodically detecting the safety state of the breaking valve is arranged on the breaking valve, the breaking valve safety inspection device comprises a first flange fixedly connected with one end of the breaking valve, a second flange slidably connected with the excircle of the other end of the breaking valve, and an outer cylinder body sleeved on the periphery of the breaking valve, one end of the outer cylinder body is integrally connected with the first flange, the other end of the outer cylinder body is detachably connected with the second flange, a closed cavity is formed between the first flange, the second flange and the outer cylinder body after being connected and the excircle of the breaking valve, a third flange is fixedly arranged on the excircle of the breaking valve close to the second flange in the closed cavity, a corrugated pipe is connected between the third flange and the second flange, and a pressure gauge for detecting the internal pressure of the closed cavity is arranged on the outer cylinder.
When the abruption valve is used normally, the connection between the outer cylinder and the second flange is in a separable state (the connection part is not provided with a connecting piece); when the real-time security check under the service condition is carried out to the snapping valve, use the connecting piece with outer barrel and second flange together fixed, then use external force to throw off the snapping valve, because the portion of throwing off of snapping valve is in closed cavity, even the snapping valve breaks down and hydrogen reveals, also can not leak, can judge whether normal the snapping valve can be carried out through the pressure variation of observing the manometer simultaneously. After the safety inspection is finished, the connecting piece between the outer cylinder body and the second flange is detached, and the two halves of the snapping valve are connected together again, so that the snapping valve can be put into normal use.
The breaking valve safety inspection device is arranged on the breaking valve, so that regular real-time safety inspection of the hydrogenation machine in the using process is realized, hydrogen leakage caused by faults of the breaking valve can be prevented, and the safety of the hydrogenation machine is improved.
Preferably, a sealing ring is arranged between the third flange and the second flange, and the sealing ring is positioned on the periphery of the corrugated pipe.
The sealing ring is connected to the end face of the third flange as one of the arrangement modes of the sealing ring between the third flange and the second flange.
And as a second arrangement mode of the sealing ring between the third flange and the second flange, the sealing ring is connected to the end face of the second flange.
The sealing ring is arranged between the third flange and the second flange, so that the fact that the snap valve is in contact with the third flange and the second flange after the snap valve is pulled open in safety inspection can be achieved, high-pressure hydrogen can further push the third flange to abut against the second flange when hydrogen leaks, more reliable sealing is formed, the corrugated pipe is protected, and reliability of the snap valve safety inspection device is further improved.
Preferably, a limit screw for preventing the second flange from sliding out of the snapping valve is further arranged between the second flange and the third flange.
Preferably, the second flange is provided with a screw connecting hole, the third flange is provided with a screw passing hole, and a thread head of the limit screw passes through the screw passing hole and then is connected to the screw connecting hole.
Through set up stop screw between second flange and third flange, can prevent on the one hand that the second flange roll-off from breaking the valve, on the other hand also can ensure the flexible at reasonable within range of bellows, prevents that the bellows from surpassing flexible stroke and damaging.
As a further improvement of the present invention, a magnetic ring is fixed to the second flange and contacts with the end surface of the outer cylinder.
The end face of the outer cylinder body is connected with the magnetism of the second flange through the magnetic ring, normal use of the stretch-break valve (the joint of the outer cylinder body and the second flange is not provided with a connecting piece) is facilitated, the outer cylinder body and the second flange can still be connected together through the magnetic effect, and therefore the parts in the closed cavity can be protected from being influenced by external dust, and the adaptability and the reliability of the stretch-break valve safety detector are further improved.
The utility model discloses in, outer barrel with the connection dismantled of second flange is bolted connection.
The utility model discloses in, still be provided with the microchannel heat exchanger on the hydrogenation pipe-line system.
The pipeline of the hydrogenation machine is provided with a micro-channel heat exchanger, and the micro-channel heat exchanger is connected between the mass flow meter and the pipeline between the hydrogenation hoses. In the hydrogenation operation process, hydrogen enters an air inlet pipeline of the hydrogenation machine from an air source interface of a hydrogenation machine host, then sequentially passes through a gas filter, an air inlet valve, a mass flow meter, a micro-channel heat exchanger, a hydrogenation hose, a breaking valve and a hydrogenation gun, and then is filled into an automobile gas storage bottle through an automobile hydrogenation port.
Compare the hydrogenation machine among the prior art, the utility model discloses owing to set up the microchannel heat exchanger on the hydrogenation machine pipeline, the relative water chiller of volume of microchannel heat exchanger is much littleer (the microchannel heat exchanger volume of chooseing for use only has about 14 cun computer size, thickness only 100mm), inside it can install the hydrogenation machine host computer to realized the installation that integrates of hydrogenation machine host computer and cooling system, reduced the area of equipment from this, and reduced the work load of equipment field installation.
In addition, the micro-channel heat exchanger is arranged in the hydrogenation unit host, so that the defect that a long pipeline needs to be laid in a traditional high-pressure hydrogenation unit adopting an external water chilling unit is overcome, the reliability of the equipment is improved, and the efficiency of a cooling system is effectively improved.
Preferably, the control system is a PLC control system or a microcomputer control system.
The utility model has the advantages that:
first, the utility model discloses a hydrogenation machine with flow control function has set up flow control valve on hydrogenation machine's pipeline, and it is connected with control system, and control system is according to mass flow meter's flow information, real-time control flow control valve to the accurate control of flow has been realized. The control system adopts the PID regulator to regulate the flow, and has the advantages of good regulation stability, reliable work and the like.
Second, the utility model discloses a hydrogenation machine with flow control function uses through the combination of the flow control valve that will realize high accuracy regulation control and adjustable orifice plate, on the one hand make full use of flow control valve's high accuracy control advantage, on the other hand make full use of adjustable orifice plate's reliable current-limiting advantage again, the security of hydrogenation machine under the high accuracy flow control has been strengthened greatly in combination between them.
Third, the utility model discloses a hydrogenation machine with flow control function through set up on the rupture valve and break valve safety inspection ware, has realized the regular real-time safety inspection of hydrogenation machine in the use to can prevent that the rupture valve from revealing because of the hydrogen that the fault leads to, improve the security of hydrogenation machine from this.
Fourth, the utility model discloses a hydrogenation machine with flow control function, the setting of sealing ring between third flange and the second flange can realize breaking the valve when the safety inspection, and it breaks the valve and pulls open the back sealing ring and contact third flange and second flange simultaneously, and high-pressure hydrogen can further promote the third flange top to the second flange when hydrogen leakage appears to form more reliable sealed, and protected the bellows, thereby further improved the reliability of breaking the valve safety inspection ware.
Fifth, the utility model discloses a hydrogenation machine with flow control function through set up stop screw between second flange and third flange, can prevent second flange roll-off breakaway valve on the one hand, and on the other hand also can ensure the flexible at reasonable within range of bellows, prevents that the bellows from surpassing flexible stroke and damaging.
Sixth, the utility model discloses a hydrogenation machine with flow control function has realized the terminal surface of outer barrel through setting up the magnetism circle and is connected with the magnetism of second flange, is favorable to when the normal use abruption valve (the junction of outer barrel and second flange does not adorn the connecting piece), and outer barrel still can link together through magnetic effect with the second flange to be favorable to protecting the part in the closed cavity can not receive the influence of external dust, has further improved the adaptability and the reliability of abruption valve safety inspection ware from this.
Seventh, the utility model discloses a hydrogenation machine with flow control function has set up the microchannel heat exchanger on hydrogenation machine's pipeline, and the relative water chiller of volume of microchannel heat exchanger will be much less (the microchannel heat exchanger volume of chooseing for use only has 14 cun computer size, thickness only 100mm approximately), and inside hydrogenation machine host computer can be installed to it to realized hydrogenation machine host computer and cooling system's the installation that integrates, reduced the area of equipment from this, and reduced the work load of equipment field installation.
Eighth, the utility model discloses a hydrogenation machine with flow control function through the built-in installation of microchannel heat exchanger at the hydrogenation machine host computer, has overcome the drawback that the long pipeline need be laid to the high pressure hydrogenation machine that the tradition adopted outside cooling water set, has improved equipment reliability from this to cooling system's efficiency has effectively been improved.
Drawings
FIG. 1 is a schematic diagram of a system structure of a hydrogenation machine with a flow regulation function according to the present invention;
FIG. 2 is a schematic diagram of a snap valve safety check device disposed on a snap valve of a hydrogenation unit;
FIG. 3 is an enlarged partial view of FIG. 2;
FIG. 4 is a schematic diagram of a prior art system of a hydrotreater.
In the figure: 1. the device comprises a breaking valve, 2, a breaking valve security check device, 3, a first flange, 4, a third flange, 5, an outer cylinder, 6, a closed cavity, 7, a pressure gauge, 8, a corrugated pipe, 9, a second flange, 10, a sealing ring, 11, a hydrogenation hose, 12, a hydrogenation gun, 13, a hydrogenation host machine, 14, a connecting piece (bolt), 15, a sealing ring, 16, a sealing ring, 17, a limiting screw, 18, a magnetic ring, 19 and a disengagement part of the breaking valve.
Detailed Description
The following description will further describe embodiments of the present invention with reference to the accompanying drawings and examples. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
As shown in fig. 1 to 4, the utility model discloses an embodiment of hydrogenation machine with flow control function, be in including hydrogenation host computer 13, setting hydrogenation pipe-line system in hydrogenation host computer 13, hydrogenation pipe-line system's output is provided with hydrogenation hose 11 and hydrogenation rifle 12, last mass flow meter and the flow control valve of being provided with respectively of hydrogenation pipe-line system, the control system of hydrogenation host computer 13 is connected respectively to mass flow meter and flow control valve.
In the technical scheme, the pipeline of the hydrogenation machine is provided with the flow regulating valve which is connected with the control system, and the control system controls the flow regulating valve in real time according to the flow information of the mass flow meter, so that the accurate control of the flow is realized.
Preferably, a PID regulator is provided in the control system, and the control system realizes the flow regulation of the flow regulating valve through the PID regulator.
The control system adopts the PID regulator to regulate the flow, and has the advantages of good regulation stability, reliable work and the like.
As a preferable scheme of this embodiment, an adjustable orifice plate for safe flow restriction is further disposed on the hydrogenation pipeline system.
Preferably, the control flow set by the flow regulating valve is smaller than the flow limiting flow set by the adjustable orifice plate.
The flow control valve capable of realizing high-precision regulation and control and the adjustable throttling orifice plate are combined for use, on one hand, the high-precision control advantage of the flow control valve is fully utilized, on the other hand, the reliable current limiting advantage of the adjustable throttling orifice plate is fully utilized, and the combination of the flow control valve and the adjustable throttling orifice plate greatly enhances the safety of the hydrogenation machine under high-precision flow regulation.
As a further improvement of this embodiment, a breaking valve 1 is disposed between the hydrogenation hose 11 and the hydrogenation gun 12, a breaking valve safety detector 2 for periodically detecting the safety state of the breaking valve 1 is disposed on the breaking valve 1, the breaking valve safety detector 2 includes a first flange 3 fixedly connected to one end of the breaking valve 1, a second flange 9 slidably connected to the outer circle of the other end of the breaking valve 1, and an outer cylinder 5 sleeved around the breaking valve 1, one end of the outer cylinder 5 is integrally connected to the first flange 3, the other end of the outer cylinder 5 is detachably connected to the second flange 9, a closed cavity 6 is formed between the first flange 3, the second flange 9 and the outer cylinder 5 after being connected to the outer circle of the breaking valve 1, a third flange 4 is fixedly disposed on the outer circle of the breaking valve 1 near the second flange 9 in the closed cavity 6, a corrugated pipe 8 is connected between the third flange 4 and the second flange 9, and a pressure gauge 7 for detecting the internal pressure of the closed cavity 6 is arranged on the outer cylinder 5.
When the snapping valve 1 is used normally, the connection between the outer cylinder 5 and the second flange 9 is in a separable state (the connection part is not provided with a connecting piece); when needing to carry out real-time security check under the user state to the abruption valve 1, use connecting piece 14 to fix outer barrel 5 and second flange 9 together, then use external force to throw off abruption valve 1, because the portion of throwing off of abruption valve 1 is in closed cavity 6, even break-away valve 1 breaks down and hydrogen reveals, can not leak, can judge whether abruption valve 1 is normal through the pressure variation who observes manometer 7 simultaneously. After the safety inspection is finished, the connecting piece 14 between the outer cylinder 5 and the second flange 9 is detached, and the two halves of the snapping valve 1 are connected together again, so that the snapping valve can be put into normal use.
The breaking valve safety inspection device 2 is arranged on the breaking valve 1, so that regular real-time safety inspection of the hydrogenation machine in the using process is realized, hydrogen leakage caused by faults of the breaking valve 1 can be prevented, and the safety of the hydrogenation machine is improved.
Preferably, a sealing ring 10 is disposed between the third flange 4 and the second flange 9, and the sealing ring 10 is located at the periphery of the corrugated pipe 8.
As one of the ways of disposing the seal ring 10 between the third flange 4 and the second flange 9, the seal ring 10 is connected to the end face of the third flange 4.
As a second mode of arranging the seal ring 10 between the third flange 4 and the second flange 9, the seal ring 10 is connected to an end face of the second flange 9.
Above-mentioned setting of sealing ring 10 between third flange 4 and the second flange 9 can realize that the snap valve 1 when the safety inspection, its snap valve 1 draws back the back sealing ring 10 and contacts third flange 4 and second flange 9 simultaneously, and high-pressure hydrogen can further promote third flange 4 top to second flange 9 when hydrogen leaks appearing to form more reliable sealed, and protected bellows 8, thereby further improved the reliability of snap valve safety inspection ware 2.
Preferably, a limit screw 17 for preventing the second flange 9 from sliding out of the pop-off valve 1 is further provided between the second flange 9 and the third flange 4.
Preferably, the second flange 9 is provided with a screw connection hole, the third flange 4 is provided with a screw through hole, and a screw head of the limit screw 17 is connected to the screw connection hole after passing through the screw through hole.
Through set up stop screw 17 between second flange 9 and third flange 4, can prevent on the one hand that second flange 9 roll-off from breaking valve 1, on the other hand also can ensure the flexible at reasonable within range of bellows 8, prevents that bellows 8 from surpassing flexible stroke and damaging.
As a further improvement of this embodiment, a magnetic ring 18 is fixed to the second flange 9 and contacts with the end face of the outer cylinder 5.
The terminal surface that has realized outer barrel 5 through setting up magnetism circle 18 is connected with the magnetism of second flange 9 above-mentioned, be favorable to when normal use abruption valve 1 (the junction of outer barrel 5 and second flange 9 does not adorn connecting piece 14), outer barrel 5 still can link together through magnetic effect with second flange 9 to be favorable to protecting the part in the closed cavity 6 and can not receive the influence of external dust, has further improved the adaptability and the reliability of abruption valve safety inspection ware 2 from this.
In this embodiment, the detachable connection between the outer cylinder 5 and the second flange 9 is a bolt 14 connection.
In this embodiment, the hydrogenation pipeline system is further provided with a microchannel heat exchanger.
The pipeline of the hydrogenation machine is provided with a micro-channel heat exchanger, and the micro-channel heat exchanger is connected between the mass flow meter and the pipeline between the hydrogenation hoses. In the hydrogenation operation process, hydrogen enters an air inlet pipeline of the hydrogenation machine from an air source interface of a hydrogenation machine host, then sequentially passes through a gas filter, an air inlet valve, a mass flow meter, a micro-channel heat exchanger, a hydrogenation hose, a breaking valve and a hydrogenation gun, and then is filled into an automobile gas storage bottle through an automobile hydrogenation port.
Compared with a hydrogenation machine in the prior art, the microchannel heat exchanger is arranged on the hydrogenation machine pipeline, the volume of the microchannel heat exchanger is much smaller than that of a water cooling unit (the volume of the selected microchannel heat exchanger is only about 14 inches of computer size and 100mm of thickness), and the microchannel heat exchanger can be installed inside the hydrogenation machine, so that the integrated installation of the hydrogenation machine and a cooling system is realized, the occupied area of equipment is reduced, and the workload of equipment field installation is reduced.
In addition, the micro-channel heat exchanger is arranged in the hydrogenation unit host, so that the defect that a long pipeline needs to be laid in a traditional high-pressure hydrogenation unit adopting an external water chilling unit is overcome, the reliability of the equipment is improved, and the efficiency of a cooling system is effectively improved.
Preferably, the control system is a PLC control system or a microcomputer control system.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the technical principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. The utility model provides a hydrogenation machine with flow control function, its characterized in that includes hydrogenation machine host computer, sets up hydrogenation pipe-line system in the hydrogenation machine host computer, hydrogenation pipe-line system's output is provided with hydrogenation hose and hydrogenation rifle, last mass flow meter and the flow control valve of being provided with respectively of hydrogenation pipe-line system, the control system of hydrogenation machine host computer is connected respectively to mass flow meter and flow control valve.
2. The hydrogenation machine with flow regulation function according to claim 1, wherein a PID regulator is provided in the control system, and the control system realizes flow regulation of the flow regulation valve through the PID regulator.
3. The hydrogenation machine with flow regulation function as claimed in claim 1, wherein the hydrogenation pipeline system is further provided with an adjustable orifice plate for safety flow restriction.
4. The hydrogenation machine with flow regulation function as claimed in claim 3, wherein the control flow set by the flow regulation valve is smaller than the flow limiting flow set by the adjustable orifice plate.
5. The hydrogenation machine with flow regulation function as claimed in claim 1, wherein a breaking valve is arranged between the hydrogenation hose and the hydrogenation gun, the breaking valve is provided with a breaking valve safety check device for periodically detecting the safety state of the breaking valve, the breaking valve safety check device comprises a first flange fixedly connected to one end of the breaking valve, a second flange slidably connected to the excircle of the other end of the breaking valve, and an outer cylinder body sleeved on the periphery of the breaking valve in an empty manner, one end of the outer cylinder body is integrally connected with the first flange, the other end of the outer cylinder body is detachably connected with the second flange, a closed cavity is formed between the first flange, the second flange and the outer cylinder body after being connected and the excircle of the breaking valve, and a third flange is fixedly arranged on the excircle of the breaking valve close to the second flange in the closed cavity, the corrugated pipe is connected between the third flange and the second flange, and a pressure gauge for detecting the internal pressure of the closed cavity is arranged on the outer cylinder body.
6. The hydrogenation machine with flow regulation function as claimed in claim 5, wherein a sealing ring is arranged between the third flange and the second flange, and the sealing ring is located at the periphery of the corrugated pipe.
7. The hydrogenation machine with flow regulation function as claimed in claim 5, wherein a limit screw for preventing the second flange from sliding out of the breaking valve is further arranged between the second flange and the third flange.
8. The hydrogenation machine with flow regulation function as claimed in claim 5, wherein a magnetic ring in contact with the end face of the outer cylinder is fixed on the second flange.
9. The hydrogenation machine with flow regulation function as claimed in claim 5, wherein the detachable connection of the outer cylinder and the second flange is a bolt connection.
10. The hydrogenation machine with flow regulation function according to claim 1, wherein a microchannel heat exchanger is further arranged on the hydrogenation pipeline system.
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| CN201920780526.4U CN210567495U (en) | 2019-05-28 | 2019-05-28 | Hydrogenation machine with flow regulation function |
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| CN201920780526.4U CN210567495U (en) | 2019-05-28 | 2019-05-28 | Hydrogenation machine with flow regulation function |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110260149A (en) * | 2019-05-28 | 2019-09-20 | 江阴市富仁高科股份有限公司 | A kind of with flow regulating function plus hydrogen machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110260149A (en) * | 2019-05-28 | 2019-09-20 | 江阴市富仁高科股份有限公司 | A kind of with flow regulating function plus hydrogen machine |
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