CN105674626B - A kind of air-source carbon dioxide heat pump system with high pressure oil - Google Patents
A kind of air-source carbon dioxide heat pump system with high pressure oil Download PDFInfo
- Publication number
- CN105674626B CN105674626B CN201610189607.8A CN201610189607A CN105674626B CN 105674626 B CN105674626 B CN 105674626B CN 201610189607 A CN201610189607 A CN 201610189607A CN 105674626 B CN105674626 B CN 105674626B
- Authority
- CN
- China
- Prior art keywords
- oil
- carbon dioxide
- high pressure
- air
- compressor
- 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.)
- Expired - Fee Related
Links
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 117
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 58
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 58
- 239000003921 oil Substances 0.000 claims abstract description 77
- 239000010687 lubricating oil Substances 0.000 claims abstract description 26
- 238000007599 discharging Methods 0.000 claims abstract description 6
- 238000011084 recovery Methods 0.000 claims abstract description 4
- 239000007788 liquid Substances 0.000 claims description 57
- 239000010720 hydraulic oil Substances 0.000 claims description 5
- 238000000926 separation method Methods 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 241000790917 Dioxys <bee> Species 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- 238000001514 detection method Methods 0.000 claims 1
- 235000003642 hunger Nutrition 0.000 abstract description 3
- 230000037351 starvation Effects 0.000 abstract description 3
- -1 belong to heat pump Substances 0.000 abstract 1
- 229960004424 carbon dioxide Drugs 0.000 description 36
- 238000005457 optimization Methods 0.000 description 8
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000003507 refrigerant Substances 0.000 description 3
- 238000004378 air conditioning Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000010725 compressor oil Substances 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 238000004177 carbon cycle Methods 0.000 description 1
- 229910002090 carbon oxide Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B30/00—Heat pumps
- F25B30/06—Heat pumps characterised by the source of low potential heat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
- F25B43/02—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat for separating lubricants from the refrigerant
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2309/00—Gas cycle refrigeration machines
- F25B2309/06—Compression machines, plants or systems characterised by the refrigerant being carbon dioxide
Abstract
The invention discloses a kind of air-source carbon dioxide heat pump system with high pressure oil, belong to heat pump, oil return mobility is deteriorated and causes the oil starvation of compressor when being run under the air-source carbon dioxide heat pump system low temperature of traditional evaporator as a whole, the present invention by be connected between compressor and air cooler in carbon dioxide recycle pipeline for the high pressure oil that is reclaimed to the lubricating oil entrained by compressor air-discharging, between the oil-out of high pressure oil and the oil inlet of compressor by pipeline be connected with for storage high pressure Oil recovery lubricating oil and to compressor input lubricating oil reservoir, existing problem of oil return when being run so as to solve under the air-source carbon dioxide heat pump system low temperature of traditional evaporator as a whole, enable the operation of unit at low temperature safer, reliably, efficiently.
Description
Technical field
The invention belongs to heat pump, specifically a kind of air-source carbon dioxide heat pump system with high pressure oil.
Background technology
The destruction of ozone layer and climate warming are the main Environmental Problems that the current whole world is faced.Due to refrigeration, air-conditioning, heat
The widely used CFC and HCFC classes refrigerant of the industries such as pump has the problems such as damaging the ozone layer and causing greenhouse effects, plus people
Growth in the living standard, various countries the demand of the systems such as refrigeration, air-conditioning, heat pump is continuously increased, the replacement of refrigerant turns into
The problem of whole world is paid close attention to.
Carbon dioxide is as a kind of natural refrigerant, because it has good environmental performance（There is no destruction to ozone layer,
And greenhouse effects are small）And paid attention to by domestic and international researcher.In addition, carbon dioxide heat pump system is run under Trans-critical cycle state
When, the temperature glide in carbon dioxide exothermic process can preferably match with temperature-variable heat source, reduce heat transfer temperature difference, therefore its Trans-critical cycle
High exhaust temperature possessed by circulation and temperature glide are especially suitable for for carrying out water temperature heating.
When the air-source carbon dioxide heat pump system of traditional evaporator as a whole is run at low temperature, due to carbon dioxide
Lubricating oil viscosity increase, mobility are deteriorated, and lubricating oil can accumulate in gas-liquid separator and cause the oil starvation of compressor, cause and open
It is dynamic to lose oil, reduce lubricant effect.
The content of the invention
The technical problem to be solved in the present invention and the technical assignment proposed are the air for overcoming traditional evaporator as a whole
The defects of oil return mobility is deteriorated and causes the oil starvation of compressor when being run under the carbon dioxide heat pump system low temperature of source, there is provided a kind of
Air-source carbon dioxide heat pump system with high pressure oil, make the operation of unit at low temperature safer, reliable, efficient.
To reach above-mentioned purpose, the air-source carbon dioxide heat pump system of the invention with high pressure oil, including according to two
Carbonoxide flows to the compressor being successively connected in carbon dioxide recycle pipeline, air cooler, throttling arrangement, evaporator, gas-liquid
Separator, described compressor have carbon dioxide inlet, oil inlet, and described air cooler has heat exchange water inlet, heat exchange
With delivery port, described evaporator has heat exchange air inlet, heat exchange air outlet, and the gas-liquid separator has carbon dioxide
Outlet, oil-out, the carbon dioxide outlet of the gas-liquid separator connect the carbon dioxide inlet of the compressor, the gas-liquid
The oil-out of separator connects the oil inlet of the compressor by pipeline, it is characterized in that：Between the compressor and air cooler
Be connected with the carbon dioxide recycle pipeline for the height that is reclaimed to the lubricating oil entrained by compressor air-discharging
Force feed point, the high pressure oil has oil-out, leads between the oil-out of the high pressure oil and the oil inlet of the compressor
Pipeline is crossed to be connected with the lubricating oil for storing the hydraulic oil point recovery and input the reservoir of lubricating oil to the compressor.
As optimization technique means：It is in series with pipeline between the oil-out and reservoir of the high pressure oil according to institute
State the magnetic valve A that the liquid level of high pressure oil is opened in good time.
As optimization technique means：Described hydraulic oil distribution is equipped with the level sensing for detecting the hydraulic oil liquid separation position
Device.
As optimization technique means：Root is in series with pipeline between described reservoir and the oil inlet of the compressor
The magnetic valve B opened in good time according to the liquid level of the reservoir.
As optimization technique means：Pipeline between the oil inlet of the oil-out of the gas-liquid separator and the compressor
In be in series with magnetic valve C.
As optimization technique means：The heat pump includes regenerator, the dioxy between the air cooler and throttling arrangement
Change the carbon dioxide recycle pipeline between carbon cycle pipeline, the gas-liquid separator and compressor and introduce described regenerator.
As optimization technique means：There is described gas-liquid separator the balance for connecting the carbon dioxide recycle pipeline to connect
Mouthful, the top of the reservoir has cavity, and described Balanced interface connects described cavity by pipeline.
As optimization technique means：Pipeline between the Balanced interface and the cavity is provided with check valve, the list
Turned on to valve by the direction cut-off of the Balanced interface to the cavity, by the direction of the cavity to the Balanced interface.
As optimization technique means：The throttling arrangement is electric expansion valve, or capillary, or electric expansion valve and electronics
The parallel connection of expansion valve, or capillary are in parallel with capillary, or electric expansion valve is in parallel with capillary.
The present invention is used for pressure by being connected between compressor and air cooler in carbon dioxide recycle pipeline
The high pressure oil that the entrained lubricating oil of contracting machine exhaust is reclaimed, between the oil-out of high pressure oil and the oil inlet of compressor
By pipeline be connected with for storage high pressure Oil recovery lubricating oil and to compressor input lubricating oil reservoir, so as to solve
Existing problem of oil return when being run under the air-source carbon dioxide heat pump system low temperature for traditional evaporator as a whole of having determined, makes machine
Group can be at low temperature operation it is safer, reliable, efficient.
Brief description of the drawings
Fig. 1 is the schematic diagram of the air-source carbon dioxide heat pump system of the invention with high pressure oil；
Label declaration in figure：1- compressors；2- air coolers；3- regenerators；4- throttling arrangements；5- evaporators；6- gas-liquids point
From device；7- check valves；8- reservoirs；9- magnetic valves C；10- high pressure oils；11- magnetic valves A；12- magnetic valves B.
Embodiment
Below in conjunction with Figure of description, the present invention will be further described.
As shown in figure 1, the air-source carbon dioxide heat pump system with high pressure oil of the present invention, including according to carbon dioxide
Flow direction be successively connected to compressor 1 in carbon dioxide recycle pipeline, air cooler 2, throttling arrangement 4, evaporator 5, gas-liquid point
From device 6, compressor 1 has carbon dioxide inlet, oil inlet, and air cooler 2 has heat exchange water inlet, heat exchange delivery port, steams
Sending out device 5 has heat exchange air inlet, heat exchange air outlet, and gas-liquid separator 6 has carbon dioxide outlet, oil-out, gas-liquid point
Carbon dioxide outlet from device 6 connects the carbon dioxide inlet of compressor 1, and the oil-out of gas-liquid separator 6 is connected by pipeline
The oil inlet of compressor 1, it is connected between compressor 1 and air cooler 2 and is used in carbon dioxide recycle pipeline to compression
The high pressure oil 10 that the entrained lubricating oil of machine exhaust is reclaimed, high pressure oil 10 have oil-out, and high pressure oil 10 goes out
The lubricating oil that is reclaimed for storage high pressure oil 10 is connected between the oil inlet of hydraulic fluid port and compressor 1 by pipeline and to compression
Machine 1 inputs the reservoir 8 of lubricating oil.
In the heat pump：The throttle parts such as electric expansion valve or capillary can be used in throttling arrangement 4, can also be by them
Parallel connection is to adapt to the bigger power of heat pump, as electric expansion valve is in parallel with electric expansion valve, or capillary and capillary paralleling, or
Electric expansion valve and capillary paralleling.For air cooler pressure and evaporator flow to be adjusted.Gas-liquid separator 6 be in order to
Ensure that no liquid CO 2 enters in compressor 1, that is, ensure the normal work of compressor.Reservoir 8, which is used to buffer, to be lubricated
Oil returns compressor.High pressure oil 10 is used to separate the carbon dioxide lubricating oil carried by compressor air-discharging.
High pressure oil 10 is used to reclaim the carbon dioxide lubricating oil entrained by compressor air-discharging, is passed so as to solve
Existing problem of oil return when being run under the air-source carbon dioxide heat pump system low temperature of the evaporator as a whole of system, makes unit low
Operation under temperature is safer, reliable, efficient.
Further, it is in series with the pipeline between the oil-out of high pressure oil 10 and reservoir 8 according to high pressure oil
The magnetic valve A11 that liquid level is opened in good time.The liquid level of high pressure oil is realized by putting liquid level sensor for hydraulic oil distribution.
It is in series with what is opened in good time according to the liquid level of reservoir 8 in pipeline between the oil inlet of reservoir 8 and compressor 1
Magnetic valve B12 is to control the insertion of the pipeline or cut-off.The liquid level of reservoir 8 also can be by configuring liquid level sensor for reservoir
Realize.
Magnetic valve C9 is in series with to control in pipeline between the oil-out of gas-liquid separator 6 and the oil inlet of compressor 1
The insertion or cut-off of the pipeline controls oil return.
The heat pump includes regenerator 3, the carbon dioxide recycle pipeline, gas-liquid between air cooler 2 and throttling arrangement 4 point
Regenerator 3 is introduced from the carbon dioxide recycle pipeline between device 6 and compressor 1.It is further to ensure there is no liquid dioxy
Change carbon to enter in compressor 1, that is, ensure the normal work of compressor.
Gas-liquid separator 6 has the Balanced interface of connection carbon dioxide recycle pipeline, and the top of reservoir 8 has cavity,
Balanced interface connects cavity by pipeline.Pipeline between Balanced interface and cavity is provided with check valve 7, and check valve is connect by balancing
Mouthful turned on to the direction cut-off of cavity, by the direction of cavity to Balanced interface, for balanced gas-liquid separator 6 and reservoir 8 it
Between pressure.
When system just starts, magnetic valve A11, B12, C9 are turned off.During work, compressor air-discharging after high pressure oil 10,
The lubricating oil overwhelming majority carried in exhaust by Gravity Separation and can be stored in high pressure oil 10, only the lubricating oil of denier
High pressure oil 10 can be gone out with exhaust, and air cooler 2, regenerator 3, throttling arrangement 4, evaporator 5 are flowed through successively with exhaust, most
Lubricating oil carries out secondary separation with exhaust in gas-liquid separator 6 afterwards, and is finally stored in gas-liquid separator 6.With process
Continue, through Gravity Separation, the liquid level of stored lubricating oil can slowly rise in high pressure oil 10, when in high pressure oil
Liquid level sensor monitor the liquid level in high pressure oil 10 reach a certain height after will opens solenoid valve A11 in time, it is then high
Lubricating oil in force feed point 10 can flow into reservoir 8, and now check valve 7 works, the gases at high pressure warp in the upper cavity of reservoir 8
Check valve 7 flows into gas-liquid separator 6 with the pressure in the upper cavity of Equalization Reservoir 8 and the upper cavity of gas-liquid separator 6 after throttling
Power；And after the liquid level that the liquid level sensor in reservoir 8 is monitored in reservoir 8 reach a certain height, it may turn on electromagnetism
Valve B12, the lubricating oil in reservoir 8 can flow into compressor 1 through compressor oil return opening；And when the liquid level in gas-liquid separator 6 passes
After sensor monitors that the liquid level in gas-liquid separator 6 reach a certain height, magnetic valve C9 is may turn on, now gas-liquid separator 6
In lubricating oil can through compressor oil return opening flow into compressor 1；When high pressure oil 10, reservoir 8 and the liquid in gas-liquid separator 6
After position is less than the height each set, corresponding magnetic valve A11, magnetic valve B12 and C9 can be closed respectively, and system so circulates.
The technical concepts and features of above example only to illustrate the invention, and be not to embodiments of the present invention
Limit.For those of ordinary skill in the field, other multi-forms can also be made on the basis of the above description
Change or variation.Here all embodiments can not be exhaustive.Every technical scheme that belongs to is amplified
Row of the obvious changes or variations gone out still in protection scope of the present invention.
Claims (9)
1. a kind of air-source carbon dioxide heat pump system with high pressure oil, including be successively connected to according to the flow direction of carbon dioxide
Compressor in carbon dioxide recycle pipeline（1）, air cooler（2）, throttling arrangement（4）, evaporator（5）, gas-liquid separator（6）,
Described compressor（1）With carbon dioxide inlet, oil inlet, described air cooler（2）Used with heat exchange water inlet, heat exchange
Delivery port, described evaporator（5）With heat exchange air inlet, heat exchange air outlet, the gas-liquid separator（6）With dioxy
Change carbon outlet, oil-out, the gas-liquid separator（6）Carbon dioxide outlet connect the compressor（1）Carbon dioxide enter
Mouthful, the gas-liquid separator（6）Oil-out the compressor is connected by pipeline（1）Oil inlet, it is characterized in that：The pressure
Contracting machine（1）With air cooler（2）Between be connected with the carbon dioxide recycle pipeline be used for compressor air-discharging is taken
The high pressure oil that the lubricating oil of band is reclaimed（10）, the high pressure oil（10）With oil-out, the high pressure oil（10）
Oil-out and the compressor（1）Oil inlet between be connected with by pipeline for storing the hydraulic oil point（10）Recovery
Lubricating oil and to the compressor（1）Input the reservoir of lubricating oil（8）.
2. the air-source carbon dioxide heat pump system according to claim 1 with high pressure oil, it is characterized in that：The high pressure
Oil（10）Oil-out and reservoir（8）Between pipeline in be in series with according to the high pressure oil（10）Liquid level open in good time
The magnetic valve A opened（11）.
3. the air-source carbon dioxide heat pump system according to claim 2 with high pressure oil, it is characterized in that：Described height
Force feed point（10）It is configured with the detection high pressure oil（10）The liquid level sensor of liquid level.
4. the air-source carbon dioxide heat pump system according to claim 1 with high pressure oil, it is characterized in that：Described storage
Liquid device（8）With the compressor（1）Oil inlet between pipeline in be in series with according to the reservoir（8）Liquid level open in good time
The magnetic valve B opened（12）.
5. the air-source carbon dioxide heat pump system according to claim 1 with high pressure oil, it is characterized in that：The gas-liquid
Separator（6）Oil-out and the compressor（1）Oil inlet between pipeline in be in series with magnetic valve C（9）.
6. the air-source carbon dioxide heat pump system according to claim 1 with high pressure oil, it is characterized in that：The heat pump system
System includes regenerator（3）, the air cooler（2）With throttling arrangement（4）Between carbon dioxide recycle pipeline, the gas-liquid separation
Device（6）With compressor（1）Between carbon dioxide recycle pipeline introduce described regenerator（3）.
7. the air-source carbon dioxide heat pump system according to claim 1 with high pressure oil, it is characterized in that：Described gas
Liquid/gas separator（6）With the Balanced interface for connecting the carbon dioxide recycle pipeline, the reservoir（8）Top have sky
Chamber, described Balanced interface connect described cavity by pipeline.
8. the air-source carbon dioxide heat pump system according to claim 7 with high pressure oil, it is characterized in that：The balance
Pipeline between interface and the cavity is provided with check valve（7）, the check valve is by the Balanced interface to the cavity
Direction cut-off, the direction conducting by the cavity to the Balanced interface.
9. the air-source carbon dioxide heat pump system according to claim 1 with high pressure oil, it is characterized in that：The throttling
Device（4）It is in parallel with electric expansion valve for electric expansion valve, or capillary, or electric expansion valve, or capillary and capillary
Parallel connection, or electric expansion valve is in parallel with capillary.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610189607.8A CN105674626B (en) | 2016-03-30 | 2016-03-30 | A kind of air-source carbon dioxide heat pump system with high pressure oil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610189607.8A CN105674626B (en) | 2016-03-30 | 2016-03-30 | A kind of air-source carbon dioxide heat pump system with high pressure oil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105674626A CN105674626A (en) | 2016-06-15 |
| CN105674626B true CN105674626B (en) | 2017-12-05 |
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ID=56224642
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610189607.8A Expired - Fee Related CN105674626B (en) | 2016-03-30 | 2016-03-30 | A kind of air-source carbon dioxide heat pump system with high pressure oil |
Country Status (1)
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| CN (1) | CN105674626B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106918160A (en) * | 2017-04-20 | 2017-07-04 | 郑州云宇新能源技术有限公司 | CO 2 trans-critical heat pump device |
| CN113390139B (en) * | 2018-05-11 | 2022-12-06 | 浙江盾安机电科技有限公司 | Carbon dioxide heat pump system |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102278837B (en) * | 2011-01-28 | 2013-08-14 | 大连三洋压缩机有限公司 | Oil equalization system of compressor units |
| CN202024537U (en) * | 2011-02-21 | 2011-11-02 | 大连三洋冷链有限公司 | Gas separation oil return device for supercritical CO2 refrigeration system |
| JP2013096640A (en) * | 2011-11-01 | 2013-05-20 | Mitsubishi Heavy Ind Ltd | Oil recovery method for multi-type air conditioning system, and multi-type air conditioning system |
| CN103968603B (en) * | 2014-03-24 | 2016-08-17 | 中国铁道科学研究院 | A kind of ultra-low-loop temperature air source heat pump and finned heat exchanger defrosting method thereof |
| CN105371515A (en) * | 2015-08-31 | 2016-03-02 | 黑龙江爱科德科技有限公司 | Carbon dioxide ground source type geothermal system |
| CN105135749B (en) * | 2015-08-31 | 2017-10-13 | 黑龙江爱科德科技有限公司 | Carbon dioxide cold-hot combined supply system |
| CN205425525U (en) * | 2016-03-30 | 2016-08-03 | 杭州佳力斯韦姆新能源科技有限公司 | Air source carbon dioxide heat pump system of oil content is pressed to height |
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2016
- 2016-03-30 CN CN201610189607.8A patent/CN105674626B/en not_active Expired - Fee Related
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Address after: 311241 Youyi village, Guali Town, Hangzhou City, Zhejiang Province Patentee after: Hangzhou swem New Energy Technology Development Co.,Ltd. Address before: 311241 Youyi village, Guali Town, Hangzhou City, Zhejiang Province Patentee before: HANGZHOU JIALISI WEIMU NEW ENERGY TECHNOLOGY Co.,Ltd. |
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