CN105416009A - Method for refrigeration recovery of liquefied gas cylinder of power equipment - Google Patents
Method for refrigeration recovery of liquefied gas cylinder of power equipment Download PDFInfo
- Publication number
- CN105416009A CN105416009A CN201510861424.1A CN201510861424A CN105416009A CN 105416009 A CN105416009 A CN 105416009A CN 201510861424 A CN201510861424 A CN 201510861424A CN 105416009 A CN105416009 A CN 105416009A
- Authority
- CN
- China
- Prior art keywords
- heat exchanger
- original
- lng
- compressor
- condenser
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/32—Cooling devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C7/00—Methods or apparatus for discharging liquefied, solidified, or compressed gases from pressure vessels, not covered by another subclass
- F17C7/02—Discharging liquefied gases
- F17C7/04—Discharging liquefied gases with change of state, e.g. vaporisation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/32—Cooling devices
- B60H2001/3286—Constructional features
- B60H2001/3289—Additional cooling source
Abstract
The invention relates to a method for refrigeration recovery of a liquefied gas cylinder of power equipment adopting liquefied natural gas (LNG) as fuel. Low-temperature cold energy of LNG in the vaporization or temperature and pressure increasing process is collected through a low-temperature heat exchanger filled with refrigerating working media which are identical with or similar to original air conditioner system working media of the power equipment, an inlet of the low-temperature heat exchanger is connected with a high-pressure pipeline behind a compressor of an original air conditioner or refrigerating system, and an outlet of the low-temperature heat exchanger is connected with a condenser of the original air conditioner. After being compressed by the compressor, the refrigerating working media are quickly cooled and depressurized by ultralow-temperature LNG when flowing through the low-temperature heat exchanger, and therefore the mechanical load of the original air conditioner or refrigerating system is lowered, and efficiency is improved; meanwhile, the power of the original refrigeration compressor is reduced, the rotating speed of the compressor is lowered, and the heat exchange area of the condenser of the original air conditioner is reduced, so that the system comprehensive refrigeration capacity and air conditioner or refrigerating system operation parameters after LNG cold energy recovery are matched, the overall cost of the air conditioner or refrigerating system is lower than that of the original system, and the using habits of the original air conditioner are not changed.
Description
Technical field
The present invention relates to LNG as the power plant of fuel consumes the recoverying and utilizing method of the useless cold energy produced in Fuel Process, specifically a kind of power plant liquefied gas bottle cooling capacity recovering method.
Background technology
Be that the liquid lng that the various forms of transport of fuel use adopts high-vacuum insulation insulation with LNG, keep the low temperature of cryogenic storage tanks inside, with vaporization and discharge less as far as possible in avoiding depositing.But use in because of blue gas for super-low liquid (-120--160 degree Celsius) cannot directly utilize, could be utilized by driving engine after must gasifying, in vaporization, there is a large amount of cold energy to be released, but because of liquid lng ultralow temperature and inflammable and explosive property, these colds are never used directly and waste, and this is also that LNG fuel cost compares the higher major reason of other fuel cost.
Some technology of existing LNG cold energy use, but be all adopt the cold energy independent of original power plant a/c system to extract and reutilization technology, its system complex, cost is high, is difficult to implement.
Summary of the invention
The present invention is directed to above problem, a kind of power plant liquefied gas bottle cooling capacity recovering method being easy to realize LNG cold energy recycle of very low cost is provided.
The technical scheme that the present invention solves the employing of its technical matters is:
A kind of power plant liquefied gas bottle cooling capacity recovering method, carry out as follows: a cryogenic heat exchanger is connected in the pressure duct between the compressor of original power plant air-conditioning or refrigeration system and condenser, cryogenic heat exchanger is filled with and original power plant air-conditioning or the identical refrigerating working medium of refrigeration system, and the power of compressor and condenser mates again with heating power simultaneously; Cryogenic heat exchanger is entered by liquefied gas bottle deep cooling LNG out, with by high temperature heat-carrying working medium interchange of heat in cryogenic heat exchanger of compressor boost, high temperature heat-carrying working medium reduces rapidly high-pressure because obtaining LNG cold energy, and then reduce the consumption of power of original air-conditioning or refrigeration system, deep cooling LNG obtains heat energy and is vaporized intensification, uses afterwards for power plant.
Further, described compressor and the power of condenser with the method that heating power mates again are: according to cryogenic heat exchanger maximum recovery cold energy ability, reduce original refrigerant compression acc power or reduce compressor rotary speed, reducing condenser heat interchanging area or the heat-sinking capability of original refrigeration system; The average refrigeration work consumption of heat exchange+condenser that the mechanical refrigeration power=original total refrigeration work consumption-cryogenic heat exchanger with cold recoverable air-conditioning or refrigeration system outfit is obtained balances the cold energy power lost.
Further, described identical refrigerating working medium, refer to that cryogenic heat exchanger is identical with the refrigerating working medium of the former use of power plant or have the thermal performance of mutual substitute for the refrigerating working medium of interchange of heat, and this refrigerating working medium is not solidified in cryogenic heat exchanger.
Further, described cryogenic heat exchanger is arranged on condenser top position, to reduce the requirement of refrigerating working medium to low temperature solidfying point, makes cryogenic heat exchanger continue to have LNG vaporization simultaneously heat ability when air-conditioning or refrigeration system are stopped transport.
Adopt the present invention of technique scheme, compared with prior art, its beneficial effect is:
Owing to taking full advantage of the original air-conditioning refrigeration system equipment in power plant system, only increase a LNG cryogenic heat exchanger (but the original LNG carburetter of energy Some substitute) and a small amount of connecting line, the cold energy high efficiente callback that just can realize LNG without any movable member utilizes, simple and practical, cost is extremely low, and reliability is high; And no matter outside cold energy reclaims the use how much all not affecting air-conditioning, does not also change any operating habit of original air-conditioning refrigeration system, is more easily accepted popularization.For the power system of 10kg/h-500kg/hLNG, recuperable cold energy will reach the cold energy of 1.5-75kw.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention;
In figure: 1-cryogenic heat exchanger; 2-air conditioner coolant; 3-compressor; 4-condenser; 5-evaporator; 6-mounted temperature insulated gas cylinder.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is further elaborated, but the present embodiment does not form any restriction to the present invention.
Power plant in the present embodiment is LNG fuel big bus passenger vehicle, and it is mounted temperature insulated gas cylinder that LNG stores low-temperature (low temperature) vessel, and the original air conditioner coolant 2 of automobile is dichlorodifluromethane R22.
See Fig. 1, cryogenic heat exchanger 1 has two loops, a loop is LNG loop: the deep cooling LNG of mounted temperature insulated gas cylinder 6 exports the LNG liquid inlet being connected to cryogenic heat exchanger 1, and the LNG of cryogenic heat exchanger 1 exports connection and heats heat exchanger or pressure maintaining valve, send automotive engine to burn afterwards; Another loop is air conditioner coolant 2 i.e. dichlorodifluromethane R22 loop: cryogenic heat exchanger 1 entrance connects the outlet of original automobile air conditioner compressor 3, and cryogenic heat exchanger 1 exports and then connects the former air-conditioned condenser 4 of automobile.
Cold energy reclaims principle:
After air conditioning for automobiles is opened, compressor 3 is by dichlorodifluromethane R22 working medium compression in a/c system, working medium after compression is with higher temperature and pressure, be pressed in cryogenic heat exchanger 1, now there is the LNG liquid of ultralow temperature to flow therethrough in cryogenic heat exchanger 1 simultaneously, R22 working medium when cryogenic heat exchanger 1 and LNG liquid carry out cold and hot exchange, after exchanging, LNG liquid is by heat vaporized evaporation, after R22 working medium absorbs LNG cold energy, temperature reduction pressure also reduces, part R22 is even had to be liquefied, absorb the R22 after LNG cold energy and deliver to the original condenser 4 of air-conditioning through cryogenic heat exchanger 1 outlet.
If R22 absorb too much cold energy be liquefied or pressure very low, then can heat supercharging by condenser 4 to R22 so that the evaporator 5 enabling R22 arrive original a/c system discharges cold energy, realize final cold energy application; If the cold that R22 working medium absorbs at cryogenic heat exchanger 1 is not enough, the R22 gas of original compressor outlet elevated pressures is failed to drop to authorized pressure temperature parameter value, then can continue to carry out interchange of heat and decrease temperature and pressure with air at condenser 4, the R22 that pressure and temp is suitable for is extracted cold energy by the evaporator 5 of original a/c system that send.
By above analysis, the former air-conditioned condenser 4 of automobile is also very important to stable air conditioner operation parameters.
Cryogenic heat exchanger 1 installation site in the present embodiment is arranged on the position higher than original air-conditioning condenser 4.The refrigerating working medium R22 that cryogenic heat exchanger 1 can be condensed takes away heat exchanger surface, prevents R22 from solidifying when lower temperature; Continue to consume LNG at LNG automobile simultaneously, when air-conditioning does not work, because the compressor 3 of air-conditioning quits work, cryogenic heat exchanger 1 front end and air-conditioning compressor partial circuit can be blocked, and the pipelines such as the condenser 4 of cryogenic heat exchanger 1 and rear portion pipeline and air-conditioning will form localized heat tube effect.Because working medium R22 boiling point is-41 degree,-120 degree left and right temperature when being connected with LNG liquid far above cryogenic heat exchanger 1, R22 temperature is again lower than condenser 4 temperature (because condenser 4 temperature is basic identical with ambient air temperature degree), therefore the liquefaction that can be condensed during R22 working medium arrival cryogenic heat exchanger 1 surface, cryogenic heat exchanger 1 position forms negative pressure, but because cryogenic heat exchanger 1 installation site is higher than the position of air-conditioning condenser 4, therefore condensed liquid can flow to air-conditioning condenser 4 position by nature, and be vaporized again formation malleation at air-conditioning condenser 4 position, which forms local heat pipe circulation, thus make cryogenic heat exchanger 1 no matter whether air-conditioning work all have to the vaporization of LNG liquid warming, this local heat pipe circulation simultaneously can make condenser 4 temperature lower than evaporator 5 temperature of original a/c system, evaporator 5 and condenser 4 can be avoided to conduct heat, more be conducive to original air-conditioning to be incubated in the winter time.
In order to the cold energy utilizing LNG as much as possible, reduce the consumption of power of original a/c system, matched design is carried out to the compressor 3 of original vehicle air conditioning, condenser 4 and cryogenic heat exchanger 1.When cryogenic heat exchanger 1 heat interchanging area uses LNG by the maximum engine that can absorb 100%, LNG vaporization heats up the cold energy design that can discharge, 5, evaporator reclaims the exchange capability of heat design of cold energy by the unnecessary LNG that can balance maximum 10% under minimum air flow speed, again can under maximum air flow speed, LNG consumes the double requirements under idling with the external heat-sinking capability of the specified refrigerating capacity of a/c system 70%.The heat interchanging area of the condenser 4 after accounting will be reduced to original 30-40%, and compressor 3 power capability or speed are transferred to original 30%-50% just can meet requirements, and improved air conditioner refrigerating machinery can consume and be only original 1/5-1/3.As using the low power air-conditioning compressor of huge discharge low pressure 3 after new car optimal design instead and using the condenser 4 of more small size instead, its cost reduced can higher than the expense of the cryogenic heat exchanger 1 newly increased and pipeline thereof.Because cryogenic heat exchanger 1 doublely can do again the effect of LNG carburetter, greatly can reduce original LNG carburetter heat interchanging area, even can cancel.For old LNG fuel vehicle a/c system as increased the cold recoverable transformation of LNG, suitably can reduce cryogenic heat exchanger 1 heat interchanging area, just LNG cold energy use rate reduces, and improvement expenses is also extremely cheap, but still can obtain considerable energy-saving effect.
Above-mentioned cold energy of liquefied natural gas recovery method, because of without any movable member, do not need to carry out large transformation to original system, just can realize LNG cold energy high efficiente callback utilize, cost is extremely low.And no matter whether having the input of outside cold energy all not affect the use of air-conditioning, the vaporization whether no matter using air-condition does not affect the original LNG fuel of vehicle yet heats performance, and does not also change any use habit of original a/c system, its reliability, safety, practicality is extremely strong, is easily accepted popularization.About 20kg/h LNG fuel big bus passenger vehicle is calculated, recuperable cold energy will reach the cold energy recovery value of 3-4kw, average every day runs 10 hours, annual use 200 days, every KWh cold energy is by 1 yuan of calculating, then the annual cold energy reclaimed is worth and will arrives (3-4) KW*10*200*1=6000-8000 unit.As new car carries out compatibility design, then drop into without the need to extra cost, as used car transformation total cost can not more than 1000 yuan, its economic value is very outstanding, greatly can promote the sexual valence cost effectiveness that LNG car uses.
The foregoing is only the better feasible embodiment of the present invention, not thereby limit to interest field of the present invention, the equivalence change that all utilizations description of the present invention is done, be all contained within interest field of the present invention.
Claims (4)
1. a power plant liquefied gas bottle cooling capacity recovering method, it is characterized in that: a cryogenic heat exchanger (1) is connected in the pressure duct between the compressor (3) of original power plant air-conditioning or refrigeration system and condenser (4), cryogenic heat exchanger (1) is filled with and original power plant air-conditioning or the identical refrigerating working medium of refrigeration system, and the power of compressor (3) and condenser (4) mates again with heating power simultaneously; Cryogenic heat exchanger (1) is entered by liquified gas container deep cooling LNG out, with by the high temperature heat-carrying working medium of compressor boost interchange of heat in the cryogenic heat exchanger (1), high temperature heat-carrying working medium reduces rapidly high-pressure because obtaining LNG cold energy, and then reduce the consumption of power of original air-conditioning or refrigeration system, deep cooling LNG obtains heat energy and is vaporized intensification, uses afterwards for power plant.
2. power plant liquefied gas bottle cooling capacity recovering method according to claim 1, it is characterized in that, described compressor (3) and the power of condenser (4) with the method that heating power mates again are: according to cryogenic heat exchanger (1) maximum recovery cold energy ability, reduce original refrigerating compressor (3) power or reduce compressor rotary speed, reducing condenser (4) heat interchanging area or the heat-sinking capability of original refrigeration system; Average refrigeration work consumption+the condenser (4) of heat exchange that mechanical refrigeration power=original total refrigeration work consumption-cryogenic heat exchanger (1) with cold recoverable air-conditioning or refrigeration system outfit is obtained balances the cold energy power lost.
3. power plant liquefied gas bottle cooling capacity recovering method according to claim 1, it is characterized in that, described identical refrigerating working medium, refer to that cryogenic heat exchanger (1) is identical with the refrigerating working medium that the former a/c system of power plant uses or have the thermal performance of mutual substitute for the refrigerating working medium of interchange of heat, and this refrigerating working medium is not solidified in cryogenic heat exchanger (1).
4. power plant liquefied gas bottle cooling capacity recovering method according to claim 1, it is characterized in that, described cryogenic heat exchanger (1) is arranged on condenser (4) top position, to reduce the requirement of refrigerating working medium to low temperature solidfying point, make when air-conditioning or refrigeration system are stopped transport cryogenic heat exchanger (1) continue to have LNG vaporization simultaneously and heat ability.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510861424.1A CN105416009B (en) | 2015-12-01 | 2015-12-01 | Power-equipment liquefied gas bottle cooling capacity recovering method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510861424.1A CN105416009B (en) | 2015-12-01 | 2015-12-01 | Power-equipment liquefied gas bottle cooling capacity recovering method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105416009A true CN105416009A (en) | 2016-03-23 |
| CN105416009B CN105416009B (en) | 2017-12-05 |
Family
ID=55494723
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510861424.1A Active CN105416009B (en) | 2015-12-01 | 2015-12-01 | Power-equipment liquefied gas bottle cooling capacity recovering method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105416009B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106224768A (en) * | 2016-08-25 | 2016-12-14 | 广西大学 | A kind of liquefied natural gas vaporization cold energy reclamation device |
| CN106382463A (en) * | 2016-11-29 | 2017-02-08 | 中国海洋石油总公司 | Technique and device for cold replacement and gradient utilization of LNG receiving station |
| CN107477357A (en) * | 2017-08-22 | 2017-12-15 | 浙江绿谷光伏科技有限公司 | Ultralow temperature liquid gas energy discharges comprehensive utilization device |
| US10596881B2 (en) | 2015-02-12 | 2020-03-24 | Carrier Corporation | Chiller for refrigeration system |
| CN116464917A (en) * | 2023-04-26 | 2023-07-21 | 山东齐鲁氢能研究院有限公司 | Integrated hydrogen-adding device based on natural gas pipe network system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102423997A (en) * | 2011-09-16 | 2012-04-25 | 上海交通大学 | Automobile air conditioning system realizing supercooling through latent heat of vaporization of liquefied natural gas (LNG) vaporization |
| WO2014160458A1 (en) * | 2013-03-13 | 2014-10-02 | Bergstrom, Inc. | Air conditioning system utilizing thermal capacity from expansion of compressed fluid |
| CN204472492U (en) * | 2015-01-16 | 2015-07-15 | 东风商用车有限公司 | A kind of commercial refrigeration car LNG cold energy recovery system |
-
2015
- 2015-12-01 CN CN201510861424.1A patent/CN105416009B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102423997A (en) * | 2011-09-16 | 2012-04-25 | 上海交通大学 | Automobile air conditioning system realizing supercooling through latent heat of vaporization of liquefied natural gas (LNG) vaporization |
| WO2014160458A1 (en) * | 2013-03-13 | 2014-10-02 | Bergstrom, Inc. | Air conditioning system utilizing thermal capacity from expansion of compressed fluid |
| CN204472492U (en) * | 2015-01-16 | 2015-07-15 | 东风商用车有限公司 | A kind of commercial refrigeration car LNG cold energy recovery system |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10596881B2 (en) | 2015-02-12 | 2020-03-24 | Carrier Corporation | Chiller for refrigeration system |
| CN106224768A (en) * | 2016-08-25 | 2016-12-14 | 广西大学 | A kind of liquefied natural gas vaporization cold energy reclamation device |
| CN106224768B (en) * | 2016-08-25 | 2018-10-23 | 广西大学 | A kind of liquefied natural gas vaporization cold energy reclamation device |
| CN106382463A (en) * | 2016-11-29 | 2017-02-08 | 中国海洋石油总公司 | Technique and device for cold replacement and gradient utilization of LNG receiving station |
| CN107477357A (en) * | 2017-08-22 | 2017-12-15 | 浙江绿谷光伏科技有限公司 | Ultralow temperature liquid gas energy discharges comprehensive utilization device |
| CN116464917A (en) * | 2023-04-26 | 2023-07-21 | 山东齐鲁氢能研究院有限公司 | Integrated hydrogen-adding device based on natural gas pipe network system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105416009B (en) | 2017-12-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104748280B (en) | A kind of LNG Power Vessels air conditioner refrigerating/heating system | |
| CN105416009A (en) | Method for refrigeration recovery of liquefied gas cylinder of power equipment | |
| CN102398496B (en) | Air-conditioning system of automobile for improving condensing effect by gasifying liquefied natural gas (LNG) | |
| CN207881304U (en) | Cryogen cold energy use technique | |
| CN106246268A (en) | A kind of engine residual heat integrative recovery system | |
| CN103344031B (en) | A kind of waring and cooling air conditioning system of Waste Heat Recovery | |
| CN107323217A (en) | A kind of CO of waste heat driving absorption refrigeration auxiliary supercooling2Air conditioning for automobiles | |
| CN203130286U (en) | Vaporization system of LNG engine | |
| CN103673384B (en) | Engine exhaust heat refrigeration system | |
| CN102996194B (en) | Comprehensive energy recycling system based on liquefied natural gas automobile | |
| CN204555150U (en) | A kind of LNG Power Vessel air conditioner refrigerating/heating system | |
| CN108556590A (en) | Integral new-energy passenger integrated thermal management system | |
| CN204154017U (en) | LNG cold energy use system | |
| CN102423997A (en) | Automobile air conditioning system realizing supercooling through latent heat of vaporization of liquefied natural gas (LNG) vaporization | |
| CN204659399U (en) | Vehicle-mounted liquefied gas bottle cold energy reclamation device | |
| CN207416860U (en) | For the air source heat pump system with second vapor injection of rail vehicle | |
| CN103851840B (en) | Heat recovery system | |
| CN204895033U (en) | Air conditioning system is retrieved to liquefied natural gas vehicle cold energy | |
| CN203719230U (en) | Vehicle LNG (Liquefied Natural Gas) refrigeration capacity recovering system with cold accumulating system | |
| CN106196531A (en) | A kind of Water-cooling type air conditioner refrigeration host computer system | |
| CN106524592A (en) | Energy-saving refrigeration device, system and technology | |
| CN203518140U (en) | Air conditioner system for recycling waste heat | |
| CN203432144U (en) | Early vendor involvement (EVI) trigeneration system | |
| CN113212109A (en) | LNG bus supercharged engine cold energy recovery method and device | |
| CN105605419A (en) | Cold energy comprehensive recycling system of air and nitrogen station and recycling method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20171107 Address after: 063200 Hebei District of Tangshan City Caofeidian Tanghai eleven team headquarters Applicant after: Tangshan City wisdom Technology Co., Ltd. Address before: 063200 Hebei province Tangshan City Caofeidian area Tanghai New District No. 195 west off Applicant before: Liu Yintong |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20191216 Address after: 210000 No.8, Shanxi Road, Gulou District, Nanjing City, Jiangsu Province Patentee after: Dong Jinhuan Address before: 063200 Team Headquarters of the Eleventh Team of Tanghai Town, Caofeidian District, Tangshan City, Hebei Province Patentee before: Tangshan City wisdom Technology Co., Ltd. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200323 Address after: 717400 Huiyuan community, Ansai District, Yanan City, Shaanxi Province Patentee after: Ansai Lvyuan oil and Gas Technology Service Co., Ltd Address before: 210000 No.8, Shanxi Road, Gulou District, Nanjing City, Jiangsu Province Patentee before: Dong Jinhuan |