CN207570149U - indirect refrigeration system - Google Patents
indirect refrigeration system Download PDFInfo
- Publication number
- CN207570149U CN207570149U CN201721725460.6U CN201721725460U CN207570149U CN 207570149 U CN207570149 U CN 207570149U CN 201721725460 U CN201721725460 U CN 201721725460U CN 207570149 U CN207570149 U CN 207570149U
- Authority
- CN
- China
- Prior art keywords
- refrigerating
- ammonia
- evaporator
- refrigeration system
- 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
- 238000005057 refrigeration Methods 0.000 title claims abstract description 57
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 126
- 229910021529 ammonia Inorganic materials 0.000 claims abstract description 64
- 239000007788 liquid Substances 0.000 claims abstract description 8
- 238000001914 filtration Methods 0.000 claims abstract description 7
- WFIZEGIEIOHZCP-UHFFFAOYSA-M potassium formate Chemical compound [K+].[O-]C=O WFIZEGIEIOHZCP-UHFFFAOYSA-M 0.000 claims abstract description 7
- 238000001035 drying Methods 0.000 claims abstract description 6
- 238000001514 detection method Methods 0.000 claims description 11
- 238000000926 separation method Methods 0.000 claims description 3
- 230000001502 supplementing effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 8
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 17
- 239000003507 refrigerant Substances 0.000 description 17
- 238000001816 cooling Methods 0.000 description 11
- 239000000243 solution Substances 0.000 description 7
- 238000010521 absorption reaction Methods 0.000 description 5
- 239000010687 lubricating oil Substances 0.000 description 5
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 239000012141 concentrate Substances 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000012267 brine Substances 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 210000001520 comb Anatomy 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 239000010730 cutting oil Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 1
- 239000013526 supercooled liquid Substances 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
Landscapes
- Sorption Type Refrigeration Machines (AREA)
Abstract
The utility model provides a kind of indirect refrigeration system, is related to cold storage refrigerating system technical field.The freezer refrigerating circulator connected including major cycle refrigerating plant and with major cycle refrigerating plant, major cycle refrigerating plant includes the ammonia refrigerating compressor for passing sequentially through pipeline connection, oil eliminator, heat regenerator, condenser, liquid reservoir, device for drying and filtering, economizer, subcooler, throttle valve and evaporator, the oil outlet of oil eliminator is connected by oil cooler with the oil inlet of ammonia refrigerating compressor, the gas outlet of subcooler is connected with the air inlet of ammonia refrigerating compressor, freezer refrigerating circulator includes the freezer comb for conveying the circulating pump of refrigerating medium and being connected with circulating pump, the entrance of circulating pump is connected with the outlet of the refrigerating medium of evaporator, the outlet of freezer comb is connected with the refrigerating medium entrance of evaporator, refrigerating medium uses potassium formate solutions.Indirect refrigeration system provided by the utility model, safety and environmental protection, heat exchanger effectiveness is high, good refrigeration effect.
Description
Technical field
The utility model belongs to cold storage refrigerating system technical field, is to be related to a kind of indirect refrigeration system more specifically.
Background technology
The type of cooling of refrigeration equipment has directly cooling and two kinds of cooling indirectly.Directly cooling is by the evaporator of refrigeration machine
It is installed in the babinet or building of refrigerating plant, air therein is directly cooled down using the evaporation of refrigerant, it is cold by cold air
But the object cooled down is needed.The advantages of this type of cooling is that cooling velocity is fast, and heat transfer temperature difference is small, and systematic comparison is simple, thus
It is widely used.Cooling is the evaporation by refrigerant in evaporator of refrigerator indirectly, so as to make refrigerating medium (such as brine) cold
But, then by the babinet or building of refrigerating medium input refrigerating plant, air therein is cooled down by heat exchanger.This cooling side
Formula system is more complicated, is generally used in the safety freezer stringenter with environmental protection.
Refrigeration system is heat to be made to be transferred to from the relatively low substance of temperature (or environment) by using outside energy in freezer
The system of the higher substance of temperature (or environment).There are many type of refrigeration system, can by the difference of used refrigerant category
It is divided into the refrigeration system of the working medium such as freon refrigeration system, ammonia refrigeration system, Refrigeration Cycle Using Refrigerant Mixture and air；It is cold by combining
The difference of library operation principle can be divided into the refrigeration systems such as compression, absorption, steam-sprayed, thermoelectric (al) type, absorption type.It is existing
Freon refrigeration system easily damages environment, and ammonia direct refrigeration system generation safety accident is more, is brought much to society
Factor leading to social instability, and novel ammonia indirect refrigerating system can well solve this problem.
Utility model content
The purpose of this utility model is to provide a kind of indirect refrigeration system, to solve safety in the prior art
With the feature of environmental protection it is poor the technical issues of.
To achieve the above object, the technical solution adopted in the utility model is：A kind of indirect refrigeration system is provided, including master
Circulating refrigerating device and the freezer refrigerating circulator connected with the major cycle refrigerating plant, the major cycle refrigerating plant packet
Include pass sequentially through pipeline connection ammonia refrigerating compressor, oil eliminator, heat regenerator, condenser, liquid reservoir, device for drying and filtering,
Economizer, subcooler, throttle valve and evaporator, the oil outlet of the oil eliminator are compressed by oil cooler and the ammonia refrigeration
The oil inlet connection of machine, the gas outlet of the subcooler are connected with the air inlet of the ammonia refrigerating compressor, and the freezer carries
SAPMAC method device includes the freezer comb for conveying the circulating pump of refrigerating medium and being connected with the circulating pump, the circulating pump
Entrance is connected with the refrigerating medium outlet of the evaporator, the outlet of the freezer comb and the refrigerating medium entrance of the evaporator
It is connected, the refrigerating medium uses potassium formate solutions.
Further, the throttle valve is electric expansion valve.
Further, the controller being electrically connected respectively with the ammonia refrigerating compressor and the electric expansion valve is further included.
Further, the ammonia detection sensor being electrically connected with the controller is provided on the evaporator.
Further, it is provided with the temperature detection sensor being electrically connected with the controller on the evaporator.
Further, it is provided with the alarm being electrically connected with the controller on the evaporator.
Further, the gas outlet of the economizer is connected with the gas supplementing opening of the ammonia refrigerating compressor.
Further, the gas outlet of the evaporator is connected with the gas returning port of the subcooler.
Further, the ammonia refrigerating compressor is ammonia semi-hermetic screw compressor.
The advantageous effect of indirect refrigeration system provided by the utility model is：Compared with prior art, the utility model
By setting major cycle refrigerating plant and freezer refrigerating circulator, using ammonia as refrigeration working medium, made using potassium formate solutions
It is efficient, safe and environment-friendly, corrosion-free for refrigerating medium so that refrigeration source and refrigeration end are divided into two mutually independent parts, and
Heat exchange is carried out by refrigerating medium；Reduce to the greatest extent with ammonia amount, reduce harm when ammonia leaks, improve cold
The safety of library refrigeration system；Ammonia and potassium formate solutions are environment-friendly products, and environment will not be damaged；Using recuperation of heat mould
Formula, full-automatic intelligent control, realizes energy saving, safe and environment-friendly and intelligentized high unity.
Description of the drawings
It, below will be to embodiment or the prior art in order to illustrate more clearly of the technical scheme in the embodiment of the utility model
Attached drawing is briefly described needed in description, it should be apparent that, the accompanying drawings in the following description is only that this practicality is new
Some embodiments of type, for those of ordinary skill in the art, without having to pay creative labor, can be with
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is the structure diagram of indirect refrigeration system that the utility model embodiment provides；
Wherein, each reference numeral in figure：
1- ammonia refrigerating compressors；2- oil eliminators；3- heat regenerators；4- condensers；5- liquid reservoirs；6- devices for drying and filtering；
7- economizers；8- subcoolers；9- throttle valves；10- evaporators；11- oil coolers；12- circulating pumps；13- freezer combs；14- is controlled
Device processed；15- ammonia detection sensors；16- alarms；17- temperature detection sensors.
Specific embodiment
In order to which technical problem to be solved in the utility model, technical solution and advantageous effect is more clearly understood, with
Lower combination accompanying drawings and embodiments, the present invention is further described in detail.It should be appreciated that specific reality described herein
It applies example to be only used to explain the utility model, is not used to limit the utility model.
Referring to Fig. 1, existing illustrate indirect refrigeration system provided by the utility model.The indirect refrigeration system,
The freezer refrigerating circulator connected including major cycle refrigerating plant and with the major cycle refrigerating plant, the major cycle refrigeration
Device include pass sequentially through pipeline connection ammonia refrigerating compressor 1, oil eliminator 2, heat regenerator 3, condenser 4, liquid reservoir 5,
Device for drying and filtering 6, economizer 7, subcooler 8, throttle valve 9 and evaporator 10, the oil outlet of the oil eliminator 2 by oil cooling but
Device 11 is connected with the oil inlet of the ammonia refrigerating compressor 1, the gas outlet of the subcooler 8 and the ammonia refrigerating compressor 1
Air inlet is connected, the freezer refrigerating circulator include for convey refrigerating medium circulating pump 12 and with the circulating pump 12
The freezer comb 13 of connection, the entrance of the circulating pump 12 are connected with the refrigerating medium outlet of the evaporator 10, the freezer
The outlet of comb 13 is connected with the refrigerating medium entrance of the evaporator 10, and the refrigerating medium uses potassium formate solutions.
Indirect refrigeration system provided by the utility model, compared with prior art, major cycle refrigerating plant are made using ammonia
For refrigeration working medium, freezer refrigerating circulator uses potassium formate solutions as refrigerating medium, efficient, environmentally friendly, corrosion-free so that refrigeration
Source and refrigeration end form two mutually independent regions, and carry out heat exchange by refrigerating medium, and heat exchanger effectiveness is high, refrigeration effect
Fruit is good；It not only reduces and uses ammonia amount, reduce the probability that ammonia leaks, and improve the safety of freezer；It is returned using heat
Device is received for collecting heat, enhances energy-saving effect.
It needs exist for further illustrating, further includes and followed respectively with the major cycle refrigerating plant and the freezer refrigerating
The controller 14 of loop device electrical connection, is used to implement the control of full-automatic intelligent；By setting the oil eliminator 2 so that
The lubricating oil of entrained in compressor air-discharging is isolated, ensures that the high-pressure gas refrigerant for entering the condenser 4 is pure, mitigates
Harmful effect of the lubricating oil film to heat transfer reduces the consumption of lubricating oil, while fluid potential difference necessary to foundation, is that oil lubrication is normal
Work provides guarantee；By setting the oil cooler 11, cutting oil, to recycle；By setting the throttling
Valve 9 makes saturation refrigerant of its throttling as low-temp low-pressure, and then refrigerant evaporates absorption heat in the evaporator 10 and reaches
To refrigeration effect；By setting the economizer 7, increase refrigerating capacity, improve refrigerating efficiency, save electric energy；By using institute
State freezer refrigerating circulator so that the refrigerating medium is first cooled and sent to the freezer in the evaporator 10 by refrigerant
The heat of cooled system is absorbed in comb 13, is then back to the evaporator 10 by the heat transfer of absorption to refrigerant, together
Shi Suoshu refrigerating mediums are cooled down again by refrigerant, refrigerant can be made to concentrate in the smaller circulatory system using the refrigerating medium,
It reduces the dosage of ammonia to the greatest extent, and cold is conveyed to freezer；In the present embodiment, the heat regenerator 3 and the condenser 4 are adopted
With horizontal shell and tube structure, the subcooler 8 uses return-air supercooled liquid device, i.e. shell-tube type structure.
Further, referring to Fig. 1, a kind of specific embodiment party as indirect refrigeration system provided by the utility model
Formula, the throttle valve 9 are electric expansion valve.By control valve flow, it is under-utilized to prevent 10 area of evaporator
With Wet Compression phenomenon, extend the service life of the ammonia refrigerating compressor 1.
Further, referring to Fig. 1, a kind of specific embodiment party as indirect refrigeration system provided by the utility model
Formula further includes the controller 14 being electrically connected respectively with the ammonia refrigerating compressor 1 and the electric expansion valve.By described in control
The openings of sizes of electric expansion valve controls the refrigeration effect of freezer, is controlled convenient for automatic intelligent.
Further, referring to Fig. 1, a kind of specific embodiment party as indirect refrigeration system provided by the utility model
Formula is provided with the ammonia detection sensor 15 being electrically connected with the controller 14 on the evaporator 10.Preferably, the ammonia system
The ammonia inspection being electrically connected with the controller 14 is both provided on cold compressor 1, the economizer 7 and the subcooler 8
Survey sensor 15；When ammonia leakage, the ammonia detection sensor 15 sends a signal to the controller 14, the controller
The 14 control ammonia refrigerating compressors 1 are stopped, while the electric expansion valve is controlled to close.
Further, referring to Fig. 1, a kind of specific embodiment party as indirect refrigeration system provided by the utility model
Formula is provided with the temperature detection sensor 17 being electrically connected with the controller 14 on the evaporator 10.When detection temperature is too low
When, the temperature detection sensor 17 sends a signal to the controller 14, and the controller 14 controls the ammonia refrigeration to compress
Machine 1 is stopped, while the electric expansion valve is controlled to close
Further, referring to Fig. 1, a kind of specific embodiment party as indirect refrigeration system provided by the utility model
Formula is provided with the alarm 16 being electrically connected with the controller 14 on the evaporator 10.The alarm 16 can also be alert
Show lamp, when ammonia leakage or too low temperature occurs, convenient for reminding administrative staff, harm reduction in time.
Further, referring to Fig. 1, a kind of specific embodiment party as indirect refrigeration system provided by the utility model
Formula, the gas outlet of the economizer 7 are connected with the gas supplementing opening of the ammonia refrigerating compressor 1.Compression refrigerating efficiency is improved, is prevented
Refrigeration effect is influenced due to the reduction of ammonia in the ammonia refrigerating compressor 1.
Further, referring to Fig. 1, a kind of specific embodiment party as indirect refrigeration system provided by the utility model
Formula, the gas outlet of the evaporator 10 are connected with the gas returning port of the subcooler 8.The utilization rate of ammonia is improved, is prevented because returning
Liquid Wet Compression and damage.
Further, referring to Fig. 1, a kind of specific embodiment party as indirect refrigeration system provided by the utility model
Formula, the ammonia refrigerating compressor 1 are ammonia semi-hermetic screw compressor.
During work, referring to Fig. 1, the ammonia of high temperature and pressure that the gas outlet of the ammonia refrigerating compressor 1 comes out passes through
It is divided into two-way after crossing the oil eliminator 2, is lubricating oil all the way, is ammonia all the way；Lubricating oil is cold by the oil cooler 11
But it turns again to afterwards in the ammonia refrigerating compressor 1；The ammonia of high temperature and pressure carries out heat by the heat regenerator 3 successively and returns
Receive, become liquefied ammonia after the condenser 4, using for storing, gas-liquid separation, filtering, noise reduction and refrigerant buffering
After the liquid reservoir 5, contaminant filter is carried out into the device for drying and filtering 6；Then it is divided into after the economizer 7 cooling
Two-way is that ammonia is entered by pipeline for giving compressor tonifying Qi in the ammonia refrigerating compressor 1 all the way, is that liquefied ammonia passes through all the way
The subcooler 8 is again broken down into two-way after cooling down；It is that liquefied ammonia i.e. refrigerant enters the evaporator by the throttle valve 9 all the way
The refrigeration of freezer is carried out in 10, refrigerating medium is first cooled and sent to by refrigerant in the freezer comb 13 in the evaporator 10
The heat of cooled system is absorbed, is then back to the evaporator 10 by the heat transfer of absorption to refrigerant, while the load
Cryogen is cooled down again by refrigerant, refrigerant can be made to concentrate in the smaller circulatory system using the refrigerating medium, and by cold
It is conveyed to freezer；The ammonia generated in the evaporator 10 simultaneously is returned to further through pipeline in the subcooler 8；It is ammonia all the way
Entered in the ammonia refrigerating compressor 1 by pipeline, form a cycle.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
All any modification, equivalent and improvement made within the spirit and principle of utility model etc., should be included in the utility model
Protection domain within.
Claims (9)
1. indirect refrigeration system, it is characterised in that：It is connected including major cycle refrigerating plant and with the major cycle refrigerating plant
Freezer refrigerating circulator, the major cycle refrigerating plant include passing sequentially through the ammonia refrigerating compressor of pipeline connection, oil separation
Device, heat regenerator, condenser, liquid reservoir, device for drying and filtering, economizer, subcooler, throttle valve and evaporator, the oil separation
The oil outlet of device is connected by oil cooler with the oil inlet of the ammonia refrigerating compressor, the gas outlet of the subcooler with it is described
The air inlet of ammonia refrigerating compressor is connected, the freezer refrigerating circulator include for convey refrigerating medium circulating pump and with
The freezer comb of the circulating pump connection, the entrance of the circulating pump is connected with the refrigerating medium outlet of the evaporator, described
The outlet of freezer comb is connected with the refrigerating medium entrance of the evaporator, and the refrigerating medium uses potassium formate solutions.
2. indirect refrigeration system as described in claim 1, it is characterised in that：The throttle valve is electric expansion valve.
3. indirect refrigeration system as claimed in claim 2, it is characterised in that：Further include respectively with the ammonia refrigerating compressor and
The controller of the electric expansion valve electrical connection.
4. indirect refrigeration system as claimed in claim 3, it is characterised in that：It is provided on the evaporator and the controller
The ammonia detection sensor of electrical connection.
5. indirect refrigeration system as claimed in claim 3, it is characterised in that：It is provided on the evaporator and the controller
The temperature detection sensor of electrical connection.
6. indirect refrigeration system as described in claim 4 or 5, it is characterised in that：It is provided on the evaporator and the control
The alarm of device electrical connection processed.
7. indirect refrigeration system as described in claim 1, it is characterised in that：The gas outlet of the economizer and the ammonia refrigeration
The gas supplementing opening of compressor is connected.
8. indirect refrigeration system as described in claim 1, it is characterised in that：The gas outlet of the evaporator and the subcooler
Gas returning port be connected.
9. indirect refrigeration system as described in claim 1, it is characterised in that：The ammonia refrigerating compressor is the semiclosed spiral shell of ammonia
Bar compressor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721725460.6U CN207570149U (en) | 2017-12-12 | 2017-12-12 | indirect refrigeration system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721725460.6U CN207570149U (en) | 2017-12-12 | 2017-12-12 | indirect refrigeration system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207570149U true CN207570149U (en) | 2018-07-03 |
Family
ID=62686797
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721725460.6U Expired - Fee Related CN207570149U (en) | 2017-12-12 | 2017-12-12 | indirect refrigeration system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207570149U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108709331A (en) * | 2018-07-06 | 2018-10-26 | 天津商业大学 | A kind of indirect cooling system experimental bench of band defrosting function |
| CN110500815A (en) * | 2019-08-29 | 2019-11-26 | 後藤锦隆 | A kind of freezer duct type thermostatic evaporator |
-
2017
- 2017-12-12 CN CN201721725460.6U patent/CN207570149U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108709331A (en) * | 2018-07-06 | 2018-10-26 | 天津商业大学 | A kind of indirect cooling system experimental bench of band defrosting function |
| CN110500815A (en) * | 2019-08-29 | 2019-11-26 | 後藤锦隆 | A kind of freezer duct type thermostatic evaporator |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103148629B (en) | Gas-liquid phase ejector synergy refrigeration system for double temperature direct cooling-type refrigerator | |
| CN204718250U (en) | Medical ultralow temperature combined type portable cold room refrigeration system | |
| CN103075831B (en) | Novel air-cooled evaporation type composite refrigeration house refrigerating system | |
| CN203274344U (en) | Energy-saving cascade refrigerating system | |
| CN207716673U (en) | Freezer refrigerating unit | |
| CN107843020A (en) | A kind of Trans-critical cycle CO2Two-stage Compression is pressurized refrigeration system | |
| CN104864621A (en) | Four-pipe double- evaporator refrigeration system | |
| CN207570149U (en) | indirect refrigeration system | |
| CN208832629U (en) | A kind of low-temperature cold water unit | |
| CN103615824A (en) | Method and device for obtaining cooling capacities of multiple temperature zones based on expansion work recycling drive | |
| CN204202062U (en) | With the water-cooled cooling water air conditioner unit of ice-reserving function | |
| CN211823239U (en) | Ultra-low temperature transcritical cascade refrigeration system | |
| CN203533948U (en) | Compound type evaporative type cooling device having natural cooling function and used for large-scale device | |
| CN214665330U (en) | With CO2Refrigerating system as refrigerant and secondary refrigerant system thereof | |
| CN201885488U (en) | Screw type cooling system and control method thereof | |
| CN210345945U (en) | Coupling unit applying cascade refrigeration cycle technology | |
| CN210688817U (en) | Gas suspension intermediate-deep secondary utilization ground source heat pump unit | |
| CN201953396U (en) | Mining low-temperature glycol air conditioner unit | |
| CN208567183U (en) | A kind of optimization system of indirect cooling-type refrigeration | |
| CN106091459A (en) | A kind of integral type refrigerating system unit | |
| CN206831907U (en) | A kind of water-cooled condenses unit | |
| CN205505472U (en) | Freon CO2 overlapping sled piece unit formula refrigerating system | |
| CN110849032A (en) | Compressor waste heat driven compression-injection refrigerating system | |
| CN204555401U (en) | Evaporation cold type Cool-water Machine for Industry group | |
| CN2364404Y (en) | Ammonia water-cooling device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190830 Address after: Room 1115, Platinum-collar Business, 120 Berlin South Road, Xinhua District, Shijiazhuang City, Hebei Province, 050060 Patentee after: Hebei Zhongchi Investment Co.,Ltd. Address before: 050000 Platinum-collar Business Floor 11, 120 Berlin South Road, Xinhua District, Shijiazhuang City, Hebei Province Patentee before: HEBEI HENG POLY REFRIGERATION TECHNOLOGY CO.,LTD. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180703 |