CN212657583U - Integrated pressure regulating device, fuel cell device, module and mobile carrier thereof - Google Patents
Integrated pressure regulating device, fuel cell device, module and mobile carrier thereof Download PDFInfo
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- CN212657583U CN212657583U CN202020312700.5U CN202020312700U CN212657583U CN 212657583 U CN212657583 U CN 212657583U CN 202020312700 U CN202020312700 U CN 202020312700U CN 212657583 U CN212657583 U CN 212657583U
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- pressure
- hydrogen
- fuel cell
- valve
- reducing valve
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/32—Hydrogen storage
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/34—Hydrogen distribution
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Abstract
The utility model relates to an integral type regulator and fuel cell device, module and removal carrier thereof removes the carrier and includes a high-pressure hydrogen gas cylinder and a hydrogen fuel cell. The integrated pressure regulating device comprises a first connector, a second connector, a first pressure reducing valve, a second pressure reducing valve, a first pipeline and an electromagnetic valve. The first interface is connected to the high-pressure hydrogen cylinder, the inlet of the first pressure reducing valve is connected to the first interface through a first pipeline, the outlet of the second pressure reducing valve is connected to the hydrogen fuel cell through a second interface, and the electromagnetic valve is arranged between the outlet of the first pressure reducing valve and the inlet of the second pressure reducing valve and used for opening and/or closing the conduction of the first pressure reducing valve and the second pressure reducing valve. The utility model discloses an integral type pressure regulating device passes through the setting of solenoid valve, can the effective control get into the hydrogen pressure of second depressurization valve, stabilizes the exit pressure of second depressurization valve, borrows this to improve hydrogen fuel cell's generating efficiency, reduces hydrogen fuel cell's harm.
Description
Technical Field
The present invention relates to a valve device, and more particularly to a valve device for introducing hydrogen gas into a vehicle-mounted fuel cell.
Background
A fuel cell vehicle is an electric vehicle using electric power generated by an on-vehicle fuel cell device as power. The fuel used by the vehicle-mounted fuel cell apparatus is generally high-purity hydrogen gas. The hydrogen as fuel and oxygen in the atmosphere are subjected to oxidation-reduction chemical reaction to generate electric energy to drive the automobile motor to work, and the automobile motor drives the mechanical transmission structure in the automobile to further drive the walking mechanical structure of the automobile to work, so that the electric automobile is driven to move forward. Compared with the traditional fuel oil automobile, the fuel cell automobile has the following advantages:
1. zero or near zero emission.
2. And the water pollution caused by engine oil leakage is reduced.
3. The emission of greenhouse gases is reduced.
4. The operation is stable and has no noise.
With the increasingly prominent environmental and energy problems, new energy vehicles have become a research hotspot of various automobile manufacturers and research and development institutions in the world, wherein fuel cell vehicles are widely considered to have wide development prospects with high efficiency and near zero emission. A great deal of money and manpower is invested in the united states, european union, japan and korea to research fuel cell vehicles, and large companies such as general, ford, cleusler, foyoda, honda, and gallow have developed fuel cell vehicles and have been operated on roads, with a generally good condition. In recent years, the investment of China in fuel cells is continuously increased, and fuel cell cars and buses are in exemplary operation during the Beijing Olympic Games and Shanghai world expo. It has been a non-competitive fact that fuel cell vehicles will take an important position in new energy vehicles.
Fuel of fuel cell car is high purity hydrogen, so compressed hydrogen cylinder must be on the car, and the hydrogen in the cylinder can be supplied to fuel cell to generate electricity after decompression. If the pressure reduction process is not properly processed, not only hydrogen is consumed, but also the power generation efficiency of the fuel cell is affected, and the fuel cell is damaged.
Some prior art patents relate to a valve body device of a fuel cell, and CN201310338206.0 provides an integral valve device of a fuel cell vehicle, comprising: an absorption block connected to a fuel electrode outlet end of the fuel cell stack to store water and discharge hydrogen gas containing impurities; a hydrogen gas exhaust line formed on the absorption block; a water discharge line formed on the absorption block; and a valve integrally connected to the hydrogen gas exhaust line and the water discharge line formed in the absorption block, thereby opening and closing the hydrogen gas exhaust line and the water discharge line at the same time.
In the prior art, CN201611092205.2 provides a hydrogen safety control method and system for a hydrogen fuel cell passenger car, when a vehicle controller monitors that the vehicle itself has no serious alarm information, and a hydrogen system controller monitors that the state of a hydrogen storage bottle is normal and the state of a fuel cell is normal, the operation of a hydrogen bottle opening electromagnetic valve is unlocked; otherwise, the operation of the hydrogen bottle port solenoid valve is locked. CN201611092205.2 strengthens the active safety of the fuel cell vehicle system while meeting the national standard requirements related to the safety of the fuel cell vehicle hydrogen system.
In the prior art, CN201720515854.2 provides a combination valve suitable for a hydrogen supply system of a fuel cell electric vehicle, which comprises a valve body, a valve seat, a; the inlet is connected with an inlet adapter which is connected with an upstream pipeline; the outlet is connected with an outlet adapter which is connected with a downstream pipeline; the unloading port is connected with an unloading port adapter, and the unloading port adapter is connected with an unloading pipeline; the inlet adapter, the outlet adapter and the unloading port adapter are all provided with external threads, and the valve body is provided with internal threads matched with the external threads; a filtering system, a pressure reducing valve system and a safety system are integrated in the valve body; the filtering system comprises an inlet filter and an outlet filter, the pressure reducing valve system comprises a primary pressure reducing valve and a secondary pressure reducing valve, and the safety system comprises a safety valve and a manual stop valve. CN201720515854.2 highly integrates each subassembly filtration system, relief valve system, safety system in a valve body, has simplified the system, and the installation is convenient for and maintenance, reduce cost.
CN201821527199.3 in the prior art discloses a novel high-pressure hydrogen integrated cylinder valve for a fuel cell automobile, which mainly solves the technical problems that a high-pressure hydrogen gas cylinder valve in the prior art adopts a connecting device of fusible alloy, the fusible alloy has poor long-term temperature resistance and short service life, and the long-term temperature resistance and the short service life of the high-pressure hydrogen gas cylinder valve are caused, and the long-term use of the high-pressure hydrogen gas cylinder valve is not facilitated. CN201821527199.3 adopts a high-pressure hydrogen integrated cylinder valve for a fuel cell automobile, which comprises a cylinder valve body and a manual valve, wherein the manual valve is arranged at the top of the cylinder valve body; the protection device is arranged at the top of the bottle mouth valve body and is provided with a temperature sensing glass ball; a pilot operated solenoid operated cylinder valve actuator; a circuit lead mechanism, which penetrates through the bottle mouth valve body. The technical problems are well solved, the high-temperature-resistant hydrogen storage device has the advantages of good long-term temperature resistance and long service life, and can be used for hydrogen storage devices and hydrogen supply systems.
Even though the above prior art mentioned the valve body device for supplying the fuel cell, the pressure instability condition that the pressure reducing valve in the prior art can not effectively overcome the pressure reducing process of the high-pressure hydrogen gas is not fully solved, and the pressure instability condition not only reduces the power generation efficiency of the fuel cell, but also is more likely to cause the damage of the fuel cell.
SUMMERY OF THE UTILITY MODEL
The utility model provides an integral type regulator aim at overcomes the unstable condition of pressure of high-pressure hydrogen decompression process, makes automobile-used fuel cell can receive stable hydrogen and supply with, improves the generating efficiency.
In order to achieve the above object, the present invention provides an integrated pressure regulating device 100 for being disposed on a mobile carrier, wherein the mobile carrier comprises a high pressure hydrogen cylinder 200 and a hydrogen fuel cell 300. The integrated pressure regulating device 100 includes: a first connection 111, a second connection 112, a first pressure reduction valve 130, a second pressure reduction valve 140, a first line 150 and a solenoid valve 160. The first connector 111 is connected to the high-pressure hydrogen cylinder 200, the inlet 131 of the first pressure reducing valve 130 is connected to the first connector 111 through the first pipeline 150, the outlet 142 of the second pressure reducing valve 140 is connected to the hydrogen fuel cell 300 through the second connector 112, and the electromagnetic valve 160 is disposed between the outlet 132 of the first pressure reducing valve 130 and the inlet 141 of the second pressure reducing valve 140, and is used for opening and/or closing the conduction of the first pressure reducing valve 130 and the second pressure reducing valve 140. By controlling the opening and/or closing of the electromagnetic valve 160, the pressure fluctuation at the inlet of the second pressure reducing valve 140 can be reduced, and the outlet pressure after the pressure reduction of the second pressure reducing valve 140 can be stabilized, so that the hydrogen fuel cell 300 can receive stable hydrogen gas supply.
Based on the same technical concept, the utility model further provides a fuel cell device for setting up on a removal carrier that has high-pressure hydrogen cylinder 200. The fuel cell apparatus comprises a hydrogen fuel cell 300 and an integrated pressure regulating device 100, the integrated pressure regulating device 100 having the features described above.
Based on the same technical conception, the utility model provides a fuel cell module again, supplies to set up on a removal carrier. The fuel cell module includes a high-pressure hydrogen cylinder 200, a hydrogen fuel cell 300, and an integrated pressure regulating device 100. The integrated pressure regulating device 100 has the aforementioned features.
Based on the same technical concept, the present invention further provides a fuel cell mobile carrier, which comprises a high pressure hydrogen cylinder 200, a hydrogen fuel cell 300, and an integrated pressure regulating device 100. The integrated pressure regulating device 100 has the aforementioned features.
Drawings
Fig. 1 is a structural layout diagram of an integrated pressure regulating device provided by the present invention;
wherein the reference numbers in the figures are as follows:
integrated pressure regulating device 100 high-pressure hydrogen cylinder 200
Second pressure reducing valve 140 first line 150
Detailed Description
The following detailed description of the present invention is provided in conjunction with the accompanying drawings, but it should be understood that the scope of the present invention is not limited by the following detailed description.
Throughout the specification and claims, unless explicitly stated otherwise, the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element or component but not the exclusion of any other element or component.
First embodiment
As shown in fig. 1, the present invention provides an integrated pressure regulating device 100 for being disposed on a mobile carrier. The mobile carrier is not limited to a land car, but can be a motorcycle trailer, a large passenger and cargo vehicle, or even a ship. The mobile carrier comprises a high-pressure hydrogen cylinder 200 and a hydrogen fuel cell 300.
The first port 111 is connected to the high-pressure hydrogen cylinder 200, the inlet 131 of the first pressure reducing valve 130 is connected to the first port 111 through the first piping 150, and the outlet 142 of the second pressure reducing valve 140 is connected to the hydrogen fuel cell 300 through the second port 112. The solenoid valve 160 is disposed between the outlet 132 of the first pressure reducing valve 130 and the inlet 141 of the second pressure reducing valve 140, and is used to open and/or close the communication between the first pressure reducing valve 130 and the second pressure reducing valve 140.
The high pressure hydrogen cylinder 200 is loaded with compressed hydrogen at a pressure of approximately 350-700 kg/cm2. When the high pressure gas is depressurized to a low pressure gas according to the ideal gas equation PV ═ nRT, the volume of the gas expands inversely proportional to the pressure. The hydrogen pressure used by the hydrogen fuel cell 300 is about 0.6 to 1.2kg/cm2Therefore, 350 to 700kg/cm2The high-pressure hydrogen cylinders 200 can thus accommodate a relatively large amount of hydrogen for the hydrogen fuel cell 300 to be used at normal pressure. However, a suitable depressurization process is required from the high-pressure hydrogen cylinder 200 to the hydrogen cell 300, and the integrated pressure regulating device 100 also functions here. The integrated voltage regulator 100 includes a first interface 111, a second interface 112, and a first voltage dropA valve 130, a second pressure reducing valve 140, a first conduit 150, and a solenoid valve 160.
In the prior art, a pressure reducing valve is usually used to reduce the pressure of 350-700 kg/cm of the high-pressure hydrogen cylinder 2002The high-pressure hydrogen is directly reduced to 0.6-1.2 kg/cm of the hydrogen battery 3002Hydrogen, but the effect is not good. The utility model discloses use two reducing valves, first reducing valve 130 is used for doing and steps down by a wide margin, and second reducing valve 140 is used for doing the small amplitude step-down. The first pressure reducing valve 130 reduces the pressure of the high pressure hydrogen cylinder 200 to 350-700 kg/cm2The high-pressure hydrogen is depressurized to 10-15 kg/cm2Then, the second pressure reducing valve 140 is used for reducing the pressure of 10-15 kg/cm2The pressure of the hydrogen is reduced to 0.6-1.2 kg/cm2. Therefore, the inlet pressure of the first pressure reducing valve 130 is 350 to 700kg/cm2The outlet pressure is 10-15 kg/cm2(ii) a The inlet pressure of the second pressure reducing valve 140 is 10 to 15kg/cm2The outlet pressure is 0.6-1.2 kg/cm2。
In order to maintain the safety of the integrated pressure regulating device 100 and the first pipeline 150, the integrated pressure regulating device 100 further includes a hot melt valve 170 disposed between the first interface 111 of the first pipeline 150 and the first pressure reducing valve 130, for opening and/or closing the communication between the high pressure hydrogen in the first pipeline 150 and the outside. Although hydrogen is stable at room temperature, it is easily burnt and exploded at high temperature due to its high activity. If the temperature of the first pipeline 150 is too high, the risk of hydrogen is greatly increased. The hot melt valve 170 has a set temperature, typically between 100 degrees celsius and 120 degrees celsius. When the temperature of the high-pressure hydrogen in the first pipeline 150 exceeds the set temperature, the hot-melt valve 170 is opened to communicate the first pipeline 150 with the outside, and the high-temperature hydrogen in the first pipeline 150 is discharged to the outside normal temperature environment, so that the temperature of the first pipeline 150 is reduced to maintain safety.
The integrated pressure regulating device 100 further includes a pressure sensor 180 disposed in front of the first pressure reducing valve 130 of the first pipeline 150 for detecting a pressure state and a pressure change before the inlet 131 of the first pressure reducing valve 130, and also for detecting an open/close state of the hot melt valve 170.
The electromagnetic valve 160 is in the utility modelThe function in the model is very important for opening and/or closing the conduction of the first pressure reducing valve 130 and the second pressure reducing valve 140. Because the first pressure reducing valve 130 is used for reducing the pressure greatly, the high-pressure hydrogen cylinder is 350-700 kg/cm2The high-pressure hydrogen is depressurized to 10-15 kg/cm2The pressure reduction amplitude is such that the outlet pressure at the outlet 132 of the first pressure reduction valve 130 is 10-15 kg/cm2The amplitude of the fluctuation is substantially large. From 10kg/cm2To 15kg/cm2With a fluctuation amplitude of up to 50%. Such fluctuation range has a great influence on the pressure reducing performance of the second pressure reducing valve 140. If the pressure reduction of the second pressure reducing valve 140 is 10kg/cm based on the inlet pressure2Set when the inlet pressure fluctuates to 15kg/cm2At that time, the outlet pressure of the second pressure-reducing valve 140 becomes too high, resulting in damage to the hydrogen fuel cell 300. It is impractical to continuously adjust the setting of the second pressure reducing valve 140 according to the inlet pressure variation of the second pressure reducing valve 140. The utility model discloses a setting of solenoid valve 160, quick and in good time open and close to change the inlet pressure of second reducing valve 140. When the inlet pressure is too high, the solenoid valve 160 is temporarily closed, and the inlet pressure can be reduced; after the inlet pressure drops to a suitable level or a predetermined period of time has elapsed, the solenoid valve 160 is opened again. The switching speed of the opening/closing of the conventional pneumatic solenoid valve is about 50Hz, i.e. 50 times per second, which is enough to maintain the inlet pressure of the second pressure reducing valve 140 with good stability.
Preferably, the solenoid valve 160 is electrically connected to the pressure sensor 180 and is activated according to the pressure and pressure fluctuation detected by the pressure sensor 180. Since the pressure sensor 180 is disposed at the inlet pressure of the first pressure reducing valve 130, when the inlet pressure fluctuates, the outlet pressure of the first pressure reducing valve 130 naturally fluctuates accordingly, which directly affects the inlet pressure of the second pressure reducing valve 140. The solenoid valve 160 is activated according to the pressure and pressure fluctuation detected by the pressure sensor 180, so that the pressure control can be performed earlier, and the good stability of the inlet pressure of the second pressure reducing valve 140 can be maintained.
Preferably, the integrated pressure regulating device 100 further comprises a third port 113 and a check valve 190, wherein the third port 113 is disposed in the high-pressure hydrogen cylinder 200 and is used for connecting an external high-pressure hydrogen supply device to introduce high-pressure hydrogen into the high-pressure hydrogen cylinder 200. The check valve 190 is provided between the third port 113 and the high-pressure hydrogen cylinder 200, and prevents the high-pressure hydrogen gas that has been filled into the high-pressure hydrogen cylinder 200 from leaking out of the third port 113.
Preferably, the integrated pressure regulating device 100 further includes a filter 195, which may be disposed between the check valve 190 and the high pressure hydrogen cylinder 200, or between the third interface 113 and the check valve 190. Is used to prevent foreign materials from entering the high pressure hydrogen cylinder 200 during the process of introducing the high pressure hydrogen into the high pressure hydrogen cylinder 200 through the third interface 113.
Second embodiment
The present invention further provides a second embodiment of a fuel cell device for being mounted on a mobile carrier having a high pressure hydrogen cylinder 200. The fuel cell apparatus includes a hydrogen fuel cell 300 and an integrated pressure regulating apparatus 100. The integrated pressure regulating device 100 has the features of the first embodiment described above.
Third embodiment
The present invention further provides a third embodiment of a fuel cell module for mounting on a mobile carrier. The fuel cell module includes a high-pressure hydrogen cylinder 200, a hydrogen fuel cell 300, and an integrated pressure regulating device 100. The integrated pressure regulating device 100 has the features of the first embodiment described above.
Fourth embodiment
The present invention further provides a fourth embodiment, which is a fuel cell mobile carrier, comprising a high pressure hydrogen cylinder 200, a hydrogen fuel cell 300, and an integrated pressure regulating device 100. The integrated pressure regulating device 100 has the features of the first embodiment described above. The mobile carrier in this embodiment is not limited to a land car, but may be a motorcycle, a large passenger-carrying vehicle, or even a ship.
The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as are suited to the particular use contemplated. The scope of the invention is defined by the claims and their equivalents.
Claims (10)
1. An integrated pressure regulating device (100) for being disposed on a mobile carrier, the mobile carrier comprising a high-pressure hydrogen cylinder (200) and a hydrogen fuel cell (300), characterized in that: the integrated pressure-regulating device (100) includes:
a first connection (111), a second connection (112), a first pressure reduction valve (130), a second pressure reduction valve (140), a first line (150) and a solenoid valve (160);
the first interface (111) is connected to the high-pressure hydrogen cylinder (200), the inlet (131) of the first pressure reducing valve (130) is connected to the first interface (111) through the first pipeline (150), the outlet (142) of the second pressure reducing valve (140) is connected to the hydrogen fuel cell (300) through the second interface (112), and the electromagnetic valve (160) is arranged between the outlet (132) of the first pressure reducing valve (130) and the inlet (141) of the second pressure reducing valve (140) and used for opening and/or closing the conduction of the first pressure reducing valve (130) and the second pressure reducing valve (140).
2. The integrated pressure regulating device (100) according to claim 1, wherein: the hydrogen-gas hydrogen supplying device further comprises a hot melting valve (170) arranged on the first pipeline (150), wherein the hot melting valve (170) has a set temperature, and when the temperature in the first pipeline (150) exceeds the set temperature, the hot melting valve (170) is opened to discharge high-pressure hydrogen in the first pipeline (150) to the outside.
3. The integrated pressure regulating device (100) according to claim 2, wherein: further comprising a pressure sensor (180) disposed in the first conduit (150).
4. The integrated pressure regulating device (100) according to claim 3, wherein: the electromagnetic valve (160) is electrically connected to the pressure sensor (180), and opens and/or closes the conduction of the first pressure reducing valve (130) and the second pressure reducing valve (140) according to the pressure change detected by the pressure sensor (180).
5. The integrated pressure regulating device (100) according to claim 4, wherein: the inlet pressure of the first pressure reducing valve (130) is 350-700 kg/cm2The outlet pressure is 10-15 kg/cm2。
6. The integrated pressure regulating device (100) of claim 5, wherein: the outlet pressure of the second pressure reducing valve (140) is 0.6-1.2 kg/cm2。
7. The integrated pressure regulating device (100) according to claim 6, wherein: the hydrogen generating device further comprises a third interface (113) and a check valve (190), wherein the third interface (113) is arranged on the high-pressure hydrogen cylinder (200) and is used for connecting an external high-pressure hydrogen supply device to introduce high-pressure hydrogen into the high-pressure hydrogen cylinder (200); the non-return valve (190) is arranged between the third interface (113) and the high-pressure hydrogen cylinder (200) to prevent the high-pressure hydrogen in the high-pressure hydrogen cylinder (200) from leaking out of the third interface (113).
8. A fuel cell device for installation on a mobile carrier having a high pressure hydrogen cylinder (200), comprising: the fuel cell arrangement comprises a hydrogen fuel cell (300) and an integrated pressure regulating device (100), the integrated pressure regulating device (100) having the features of any one of claims 1 to 7.
9. A fuel cell module for being mounted on a mobile carrier, said fuel cell module comprising a high pressure hydrogen cylinder (200) and a hydrogen fuel cell (300), characterized in that: the fuel cell module further comprises an integrated pressure regulating device (100) having the features of any one of claims 1 to 7.
10. A fuel cell mobile carrier comprises a high-pressure hydrogen cylinder (200) and a hydrogen fuel cell (300), and is characterized in that: further comprising an integrated pressure regulating device (100) having the features of any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020312700.5U CN212657583U (en) | 2020-03-13 | 2020-03-13 | Integrated pressure regulating device, fuel cell device, module and mobile carrier thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020312700.5U CN212657583U (en) | 2020-03-13 | 2020-03-13 | Integrated pressure regulating device, fuel cell device, module and mobile carrier thereof |
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| Publication Number | Publication Date |
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| CN212657583U true CN212657583U (en) | 2021-03-05 |
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| CN202020312700.5U Expired - Fee Related CN212657583U (en) | 2020-03-13 | 2020-03-13 | Integrated pressure regulating device, fuel cell device, module and mobile carrier thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113236971A (en) * | 2021-05-31 | 2021-08-10 | 威海盛泰智能仪器仪表有限公司 | Method for realizing liquefied petroleum gas safety management by monitoring change of medium pressure |
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2020
- 2020-03-13 CN CN202020312700.5U patent/CN212657583U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113236971A (en) * | 2021-05-31 | 2021-08-10 | 威海盛泰智能仪器仪表有限公司 | Method for realizing liquefied petroleum gas safety management by monitoring change of medium pressure |
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Granted publication date: 20210305 |