CN201348401Y - Absorption type refrigerating device with energy compensation - Google Patents
Absorption type refrigerating device with energy compensation Download PDFInfo
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- CN201348401Y CN201348401Y CNU200820241154XU CN200820241154U CN201348401Y CN 201348401 Y CN201348401 Y CN 201348401Y CN U200820241154X U CNU200820241154X U CN U200820241154XU CN 200820241154 U CN200820241154 U CN 200820241154U CN 201348401 Y CN201348401 Y CN 201348401Y
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/62—Absorption based systems
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- Sorption Type Refrigeration Machines (AREA)
Abstract
An absorption type refrigerating device with energy compensation belongs to the refrigeration technical field, the magnetic pump adopts a dual-power magnetic driven pump with a hydraulic motor, a liquid inlet (5) of the hydraulic motor on the dual-power magnetic driven pump is communicated with a liquid outlet from the generator, the liquid outlet (13) of the hydraulic motor is communicated with a liquid return pipe flowing to the absorption device. Adopting the liquid return pressure difference between the generator and the absorption device, the hydraulic motor having the same one axis with the magnetic pump is driven for compensating energy, the energy consumption of the magnetic pump is reduced, the working reliability and the wearing property of the liquid supply pump can be improved, the energy consumption is small, the refrigeration efficiency (COP) is high, the structure is simple, the volume and the weight are small, the device is suitable for applications in various refrigeration systems.
Description
Technical field
The utility model relates to a kind of absorption type refrigerating unit, relates in particular to a kind of absorption type refrigerating unit with energy compensating.Belong to refrigeration technology field.
Background technology
Absorption system is to solve owing to use one of effective way of a series of environmental problems that freon causes, and the while absorption system also has and can use low-temperature heat source as advantages such as power.
Absorption Refrigerator has ammonia-water absorption type, lithium bromide-water absorption type and ammonia-hydrogen-water diffusion absorbing at present.Ammonia-water absorption refrigerating machine is cold-producing medium with ammonia, with water is absorbent, can realize the temperature below 0 ℃, but ammonia spirit has corrosiveness to nonferrous materials (except that phosphor bronze), and because ammonia and the gasification temperature of water under uniform pressure are relatively near (for example at a normal atmospheric pressure, the boiling point of ammonia and water is respectively-33 ℃ and 100 ℃, and both only differ 133.4 ℃) thereby must use rectifying device.Lithium bromide-water-absorbing type refrigeration machine is water absorbing agent with the lithium bromide, and water is cold-producing medium, generally can only produce the temperature more than 5 ℃, and needs to keep vacuum state, and its crystallisation problems and etching problem also bring very big problem for the operation and maintenance of refrigeration system.The working medium of diffusion absorption refrigerating machine is to being ammonia-hydrogen-water, ammonia is cold-producing medium in its three components, hydrogen is diffusant, water is absorbent, kind of refrigeration cycle is by the evaporation and the condensation process of ammonia, and ammoniacal liquor absorbs and parsing ammonia process is formed, the diffusivity of hydrogen is very strong, in circulation, because the diffusion of hydrogen in evaporimeter makes wherein ammonia dividing potential drop reduction, owing to there is not the throttling valve member between condenser and evaporimeter, gross pressure in the evaporimeter equals condensing pressure, and the ammoniacal liquor in the evaporimeter can be depressed at lower ammonia branch and produce the sweat cooling effect.Simultaneously,, make solution under the situation that does not have mechanical pump to promote, between absorber and generator, circulate because solution is heated to the thermosyphon action that density contrast produced when seething with excitement.Working medium must be provided with distillation system to as adopting ammonia-water in this system, and utilizes siphon pumps to promote circulation, and its refrigerating capacity is less, and refrigerating efficiency is lower.
Chinese patent publication number: CN101029783, open day: on September 5th, 2007, denomination of invention: " sodium sulfocyanate-ammonia diffusion absorbing refrigerator ", proposed generator one end is linked to each other with gas-liquid separator, the gas-liquid separator top links to each other with the diffusion jar through condenser, the gas-liquid separator bottom links to each other with pump by solution heat exchanger, the diffusion pot bottom forms the loop of sealing by pump and evaporimeter, and the diffusion jar is communicated with respectively with the absorber upper and lower side, absorber one end and cooler form the loop of circulation, the technical scheme that absorber is connected with solution heat exchanger through pump again simultaneously.This scheme has been omitted rectifier unit, adopts magnetic drive pump, and lower heat source temperature just can satisfy the requirement of drive system, has improved refrigerating efficiency.But because there is the diffusion of hydrogen, make the gasification rate of cold-producing medium descend in this scheme, restricted the further raising of system's thermodynamic coefficient.
Summary of the invention
The purpose of this utility model is big at existing absorption type refrigerating unit volume, the maintenance cost height, the energy consumption height, thermodynamic coefficient is low, defective that reliability and durability are relatively poor and deficiency, it is lower to propose a kind of system energy consumption, and the solution pump output torque is higher, reliability and durability are better, and can make the absorption type refrigerating unit of the band energy compensating of absorption system miniaturization.
The purpose of this utility model realizes in the following manner: a kind of absorption type refrigerating unit with energy compensating, comprise generator, condenser, absorber, evaporimeter and magnetic drive pump, described magnetic drive pump adopts the double-power magnetically-actuated pump that has hydraulic motor, the inlet of hydraulic motor is communicated with fluid pipeline from generator on the double-power magnetically-actuated pump, and the liquid outlet of hydraulic motor is communicated with the back liquid pipeline that flows to absorber.
The inlet of hydraulic motor is communicated with the hydrothermal solution fluid pipeline of solution heat exchanger on the described double-power magnetically-actuated pump, the hydrothermal solution input duct of solution heat exchanger is communicated with generator, perhaps be communicated with generator by gas-liquid separator, the liquid outlet of hydraulic motor is communicated with the input duct of cooler, and the liquid outlet of cooler is communicated with the back liquid pipeline of absorber.
Solution feed pump on the described double-power magnetically-actuated pump is gear pump or screw pump or centrifugal pump.
Hydraulic motor on the described double-power magnetically-actuated pump is a gear-type hydraulic motor.
Double-power magnetically-actuated pump described in the utility model, by the applicant in having applied for invention and utility model patent to Patent Office of State Intellectual Property Office on the same day.
Compared with prior art the utlity model has following tangible advantage:
1. the utility model adopts the double dynamical magnetic drive pump of band energy compensating as power source, utilize generator to the hydraulic pressure difference of returning between the absorber, shared one hydraulic motor of driving and magnetic drive pump is made energy compensating, has reduced the energy consumption of solution feed pump, has improved the reliability and the durability of solution feed pump work.
2. the utility model device and lithium bromide-water, ammonia-hydrogen-water is compared with ammonia-water refrigerating plant, and with under the constant power, its volume and weight are much smaller than them.
3. the utility model device is provided with working medium that a cover drives by solution feed pump to solution forced circulation heat-radiation loop, to the solution decrease temperature and pressure, makes the absorbability of absorber than traditional absorber significant lifting be arranged to the working medium in the absorber.
4. compare with present absorption type refrigerating unit, the utlity model has simple in structure, efficient, the dead-tight advantage of operation, and cost of manufacture and operating cost can reduce significantly.
Description of drawings
Fig. 1 is the theory diagram of first kind of structure of the utility model;
Fig. 2 is the theory diagram of second kind of structure of the utility model;
Fig. 3 is the structural representation of a kind of double-power magnetically-actuated pump in the utility model;
Fig. 4 is the theory diagram of the third structure of the utility model.
Among the figure, driven gear shaft 1, solution feed pump inlet 2, driven gear 3, hydraulic motor input gear 4, hydraulic motor inlet 5, rear end cap 6, end cover 7 drives magnet ring 8, motor 9, driven magnetic core 10, hydraulic motor output gear 11, driving gear 12, hydraulic motor liquid outlet 13, center end plate 14, solution feed pump liquid outlet 15, drive end bearing bracket 16, driving shaft 17, hydraulic motor input gear shaft 18.
The specific embodiment
Below in conjunction with the description of drawings and the specific embodiment the utility model is described in further detail:
Referring to Fig. 1, a kind of absorption type refrigerating unit of the present utility model with energy compensating, comprise generator, condenser, absorber, evaporimeter and magnetic drive pump, described magnetic drive pump adopts the double-power magnetically-actuated pump that has hydraulic motor, the inlet 5 of hydraulic motor is communicated with pipeline from the generator liquid outlet on the double-power magnetically-actuated pump, and the liquid outlet 13 of hydraulic motor is communicated with the back liquid pipeline that flows to absorber.
In existing absorption system, output to generator by the liquid working substance in the absorber through pump, enter the liquid working substance of generator, under the effect of temperature and pressure, a part becomes refrigerant vapour, and refrigerant vapour is back to absorber through condenser, evaporimeter refrigeration after doing work; Another part liquid working substance such as the liquor ammoniae dilutus of generator inside directly are back to absorber under pressure.For absorption system, generally speaking, the fluid pressure differential in generator and the absorber can reach 1.5-2.5Mpa, adopts double-power magnetically-actuated pump just can make full use of this fluid pressure differential and drives its solution feed pump acting.Double dynamical pump as shown in fig. 1 is the double-power magnetically-actuated pump in the utility model, solution feed pump inlet 2 on the double dynamical pump is connected with the absorber liquid outlet through pipeline, solution feed pump liquid outlet 15 is connected with the inlet of generator through pipeline, with hydraulic motor inlet 5 through pipeline be connected with the generator liquid outlet, hydraulic motor liquid outlet 13 is connected with liquid return hole on the absorber through pipeline.During work, the motor of the double dynamical pump of the utility model rotates, liquid working substance in the absorber, solution feed pump on double-power magnetically-actuated pump enters generator, the hydraulic motor that highly pressurised liquid working medium in the generator promotes again on the double dynamical pump rotates, and provide extra power to solution feed pump, power compensation effect by hydraulic motor, can overcome magnetic force driving pump when too high output torque is provided, because of driving torque increase and the nonsynchronous magnetic hysteresis effect of rotating speed between magnet ring 8 and the driven magnetic core 10, produce high temperature and cause reducing of magnetically-actuated POF, stop, even damage, reliability and durability significantly improve.Can further reduce the output torque and the volume of magnetic drive pump, energy consumption is little.Therefore, the utility model device can impel the commercial Transformation Application of Absorption Refrigerator miniaturization, provides effective solution for satisfying different refrigeration demand.
Referring to Fig. 2, the another kind of structure of existing absorption type refrigerating unit is that the end with generator links to each other with gas-liquid separator, liquid outlet on the gas-liquid separator links to each other with the hydrothermal solution inlet of solution heat exchanger through pipeline, perhaps an end of generator directly is communicated with the hydrothermal solution inlet of solution heat exchanger through pipeline, the cold liquid inlet of solution heat exchanger is communicated with the fluid pipeline of absorber, and the cold liquid liquid outlet of solution heat exchanger is communicated with the input duct of generator.And on the liquid back pipe road of absorber, be in series with cooler, in this case, the inlet 5 of hydraulic motor on the described double-power magnetically-actuated pump is communicated with the hydrothermal solution fluid pipeline of solution heat exchanger, the hydrothermal solution input duct of solution heat exchanger is communicated with the liquid outlet of generator with the liquid outlet of generator or by gas-liquid separator, the liquid outlet 13 of hydraulic motor is communicated with the input duct of cooler, and the liquid outlet of cooler is communicated with the back liquid pipeline of absorber.
Referring to Fig. 3, active revolving meber on the existing gear pump driven by magnetic force is a driving gear 12, the one or both ends of motor 9 are fixed with and drive magnet ring 8, be provided with driven magnetic core 10 in the inside correspondence that drives magnet ring 8, leave the gap between driven magnetic core 10 and the driving magnet ring 8, under the effect of the magnetic line of force, constitute contactless connection.On the one or both ends of motor 9 housings, be fixed with rear end cap 6,, between motor 9 and rear end cap 6, also be provided with end cover 7 for guaranteeing sealing effectiveness.The center fixation of driven magnetic core 10 has driving shaft 17, and driving shaft 17 passes rear end cap 6 fixedlys connected with driving gear 12, and the other end of driving shaft 17 supports on the drive end bearing bracket 16.The gear solution feed pump pump housing is included in the outside of driving gear 12 and driven gear 3, and constitutes the external shell of gear solution feed pump with rear end cap, drive end bearing bracket 16, and the gear solution feed pump pump housing is provided with solution feed pump inlet 2 and solution feed pump liquid outlet 15.Be meshed with driven gear 3 at the inner driving gear 12 of the gear solution feed pump pump housing, the two ends of solution feed pump driven gear shaft 1 are supported on respectively on rear end cap 6 and the drive end bearing bracket 16.When magnetic drive pump moves, motor 9 drives and drives magnet ring 8 rotations, under the effect that drives magnet ring 8 magnetic fields, driven magnetic core 10 rotates thereupon, and by driving shaft 17 drive driving gears 12 and driven gear 3 runnings, the liquid at solution feed pump inlet 2 places is pressed to solution feed pump liquid outlet 15, thereby reach the purpose of carrying fluid.
The utility model has increased a hydraulic motor in the pump housing one side of gear solution feed pump.Hydraulic motor can be arranged on the outside of gear solution feed pump, and promptly the gear solution feed pump is arranged between hydraulic motor and the driven magnetic core 10.Described hydraulic motor is arranged between solution feed pump and the driven magnetic core 10, and the rear end cap 7 of hydraulic motor one side is fixed on the housing of magnetically-actuated pump motor 9, and the center end plate 14 of hydraulic motor opposite side is connected with solution feed pump.Between rear end cap 6 and drive end bearing bracket 16, increased center end plate 14, housing between drive end bearing bracket 16 and the center end plate 14 is provided with solution feed pump inlet 2 and solution feed pump liquid outlet 15, in enclosure interior driving gear 12 and driven gear 3 are housed, driving gear 12 is fixed on the driving shaft 17, driven gear 3 is fixed on the driven gear shaft 1, and the two ends of driven gear shaft 1 are installed in respectively on drive end bearing bracket 16 and the center end plate 14.Housing between center end plate 14 and the rear end cap 6 is provided with hydraulic motor inlet 5 and hydraulic motor liquid outlet 13, and corresponding the setting is equipped with hydraulic motor output gear 11 and hydraulic motor input gear 4.Driving shaft 17 1 ends are fixed on the driven magnetic core 10, and the other end passes rear end cap 6 back fixedlys connected with hydraulic motor output gear 11, pass center end plate 14 again and then fixedly connected with driving gear 12, at last with its end portion supports on drive end bearing bracket 16.The two ends of hydraulic motor input gear shaft 18 are supported on respectively on center end plate 14 and the rear end cap 6, fixedly connected with hydraulic motor input gear 4 in the middle part of hydraulic motor input gear shaft 18.In the utility model hydraulic motor inlet 5 and solution feed pump inlet 2 that direction is set is identical, hydraulic motor liquid outlet 13 and solution feed pump liquid outlet 15 that direction is set is identical.Because hydraulic motor output gear 11 is fixed on the driving shaft 17, and near hydraulic motor liquid outlet 13, when hydraulic motor inlet 5 flow into be the higher fluid of pressure the time, just can promote hydraulic motor input gear 4 rotates, and drive hydraulic motor output gear 11 rotates, to driving shaft 17 outputting powers, flow out through hydraulic motor liquid outlet 13 again after the high-pressure fluid acting.
At Fig. 1, among Fig. 2, described double dynamical magnetic drive pump is provided with a solution feed pump and a hydraulic motor, and two solution feed pumps and a hydraulic motor also can be set as required, or two solution feed pumps and two hydraulic motors are set.
Referring to Fig. 3, Fig. 4, described double dynamical magnetic drive pump is provided with two solution feed pumps, a conveying that is used for working medium to solution, a circulation that is used for the interior working medium of absorber to solution.Solution feed pump inlet 2 on the two pumps all is connected on the fluid pipeline of absorber, solution feed pump liquid outlet 15 on solution feed pump is communicated with the input duct of generation with generator or by solution heat exchanger, and the solution feed pump liquid outlet 15 on another solution feed pump is communicated with the back liquid pipeline of absorber with the back liquid pipeline of absorber or through cooler.Because the working medium of having set up forced circulation by solution feed pump between the liquid outlet of absorber and liquid return hole can be aided with air blast cooling or water-cooled measure to the flow of solution loop, has reduced the temperature and pressure in the absorber.Make the absorbability of absorber compare and significantly to promote with traditional absorber.And absorber working medium of the present utility model to solution forced circulation scheme at Fig. 1, also can realize on the double-power magnetically-actuated pump of a solution feed pump and a hydraulic motor among Fig. 2 by the reflux line that leads to absorber in parallel on solution feed pump liquid outlet 15.Simultaneously, also can adjust the flow of solution feed pump and hydraulic motor respectively, fluctuate in normal range (NR) to guarantee the liquid in absorber and the generator, and need not to be provided with control valve according to the balance principle of working medium in the refrigeration system to circulating.
Solution feed pump described in the utility model on the double-power magnetically-actuated pump is gear pump or screw pump or centrifugal pump.Hydraulic motor on the described double-power magnetically-actuated pump is a gear-type hydraulic motor.
When the motor of the double dynamical pump of the utility model rotates, by the transmission of power of motor 9 output to driving shaft 17, drive driving gear 12 and driven gear 3 runnings simultaneously, the liquid at solution feed pump inlet 2 places is pressed to solution feed pump liquid outlet 15, thereby reach the purpose of carrying fluid.When the hydraulic motor inlet 5 to double dynamical pump injects high-pressure fluid, high-pressure fluid promotes hydraulic motor input gear 4 and rotates, and drive hydraulic motor output gear 11 rotates, by hydraulic motor output gear 11 with transmission of power to driving shaft 17, drive driving gear 12 and driven gear 3 rotations by driving shaft 17, the liquid at solution feed pump inlet 2 places is pressed to solution feed pump liquid outlet 15, thereby reach the purpose of carrying fluid.Motor 9 and hydraulic motor in the utility model device on the double dynamical pump rotate simultaneously, simultaneously provide power to driving shaft 17, then can improve the moment of torsion of the double dynamical pump of the utility model output greatly, can avoid preferably increasing the high temperature that institute causes the generation of magnetic coupling part because of the magnetic drive pump output torque.Thereby can dwindle the volume of magnetic drive pump, improve the reliability and the durability of magnetic drive pump.The utility model device utilizes in the refrigeration system residue or useless high-pressure fluid to drive hydraulic motor, and is energy-conservation and the environmental protection effect is obvious, remarkable in economical benefits.
The utility model device uses sodium rhodanate-ammonia or lithium nitrate-ammonia right as working medium, and through the operation actual measurement: when heat source temperature during at 75 ℃, evaporation (refrigeration) temperature reaches-6 ℃, when heat source temperature during at 90-100 ℃, evaporates (refrigeration) and can reach-33 ℃.In the refrigerating plant, the required horsepower of magnetic drive pump reduces.
Claims (5)
1. absorption type refrigerating unit with energy compensating, comprise generator, condenser, absorber, evaporimeter and magnetic drive pump, it is characterized in that: described magnetic drive pump adopts the double-power magnetically-actuated pump that has hydraulic motor, the inlet of hydraulic motor (5) is communicated with pipeline from the generator liquid outlet on the double-power magnetically-actuated pump, and the liquid outlet of hydraulic motor (13) is communicated with the back liquid pipeline that flows to absorber.
2. a kind of absorption type refrigerating unit according to claim 1 with energy compensating, it is characterized in that: the inlet of hydraulic motor (5) is communicated with the hydrothermal solution fluid pipeline of solution heat exchanger on the described double-power magnetically-actuated pump, the hydrothermal solution input duct of solution heat exchanger is communicated with the liquid outlet of generator with the liquid outlet of generator or by gas-liquid separator, the liquid outlet of hydraulic motor (13) is communicated with the input duct of cooler, and the liquid outlet of cooler is communicated with the back liquid pipeline of absorber.
3. a kind of absorption type refrigerating unit according to claim 1 with energy compensating, it is characterized in that: described magnetic force driving pump is provided with two solution feed pumps, solution feed pump inlet (2) on two solution feed pumps all is connected on the fluid pipeline of absorber, solution feed pump liquid outlet (15) on solution feed pump is communicated with the input duct of generator, and the solution feed pump liquid outlet (15) on another solution feed pump is communicated with the back liquid pipeline of absorber with the back liquid pipeline of absorber or through cooler.
4. a kind of absorption type refrigerating unit with energy compensating according to claim 1 and 2 is characterized in that: the hydraulic motor on the described double-power magnetically-actuated pump is a gear-type hydraulic motor.
5. according to claim 1 or 3 described a kind of absorption type refrigerating units with energy compensating, it is characterized in that: the solution feed pump on the described double-power magnetically-actuated pump is gear pump or screw pump or centrifugal pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820241154XU CN201348401Y (en) | 2008-12-30 | 2008-12-30 | Absorption type refrigerating device with energy compensation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820241154XU CN201348401Y (en) | 2008-12-30 | 2008-12-30 | Absorption type refrigerating device with energy compensation |
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| Publication Number | Publication Date |
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| CN201348401Y true CN201348401Y (en) | 2009-11-18 |
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| CNU200820241154XU Expired - Fee Related CN201348401Y (en) | 2008-12-30 | 2008-12-30 | Absorption type refrigerating device with energy compensation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108027269A (en) * | 2015-09-15 | 2018-05-11 | Avl列表有限责任公司 | Coolable device for the through-flow process for measuring fluid |
| CN110926052A (en) * | 2019-11-26 | 2020-03-27 | 上海交通大学 | Absorption refrigeration system based on differential pressure driving and circulation method thereof |
-
2008
- 2008-12-30 CN CNU200820241154XU patent/CN201348401Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108027269A (en) * | 2015-09-15 | 2018-05-11 | Avl列表有限责任公司 | Coolable device for the through-flow process for measuring fluid |
| US10816379B2 (en) | 2015-09-15 | 2020-10-27 | Avl List Gmbh | Coolable device for measuring through-flow processes of fluids |
| CN110926052A (en) * | 2019-11-26 | 2020-03-27 | 上海交通大学 | Absorption refrigeration system based on differential pressure driving and circulation method thereof |
| CN110926052B (en) * | 2019-11-26 | 2021-08-24 | 上海交通大学 | Absorption refrigeration system based on differential pressure driving and circulation method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20110617 Granted publication date: 20091118 Pledgee: Wuhan Huachuang City Jiang'an District microfinance Ltd. Pledgor: Hubei Shiji Haibo Refrigeration Technology Co., Ltd. Registration number: 2010420000683 |
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| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091118 Termination date: 20121230 |