CN111795519B - Absorption type circulating multifunctional heat exchanger - Google Patents
Absorption type circulating multifunctional heat exchanger Download PDFInfo
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- CN111795519B CN111795519B CN202010546839.0A CN202010546839A CN111795519B CN 111795519 B CN111795519 B CN 111795519B CN 202010546839 A CN202010546839 A CN 202010546839A CN 111795519 B CN111795519 B CN 111795519B
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- evaporator
- economizer
- absorber
- heat exchanger
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- 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
- F25B39/00—Evaporators; Condensers
- F25B39/02—Evaporators
- F25B39/026—Evaporators specially adapted for sorption type systems
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- 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
- F25B37/00—Absorbers; Adsorbers
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- 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
- F25B2339/00—Details of evaporators; Details of condensers
- F25B2339/02—Details of evaporators
- F25B2339/021—Evaporators in which refrigerant is sprayed on a surface to be cooled
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- 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
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/13—Economisers
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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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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Sorption Type Refrigeration Machines (AREA)
Abstract
The invention relates to an absorption type circulating multifunctional heat exchanger, which belongs to the technical field of heat exchangers and comprises a cylinder tube plate, an economizer, an evaporator, an absorber and an absorbent spraying system, wherein the economizer, the evaporator, the absorber and the absorbent spraying system are arranged in the cylinder tube plate, and the absorption type circulating multifunctional heat exchanger is characterized in that: the evaporator and the absorber are arranged on two sides of the central partition plate, the absorbent spraying system and the economizer are arranged on two sides of the bidirectional liquid collector, the absorbent spraying system and the absorber are located in the same half barrel, and the economizer and the evaporator are located in the same half barrel. Compared with the prior art, the invention integrates the absorber, the evaporator and the economizer into a whole, reduces the total occupied space of the original plurality of heat exchangers, omits the gas phase pipeline connection among the original three heat exchangers, reduces the gas resistance and optimizes the system arrangement.
Description
Technical Field
The invention belongs to the technical field of heat exchangers, and particularly relates to an absorption type circulating multifunctional heat exchanger.
Background
The absorption type circulating system mainly comprises a generator, an absorber, an evaporator and other heat exchangers, a pump, a valve and the like, and realizes refrigeration and heat exchange through phase change of working media. At present, an evaporator, an absorber and an economizer of an absorption type circulating system mostly use independent heat exchangers, the occupied space is large, and gas phase flow among the three heat exchangers needs to be connected through pipelines, so that large resistance is generated. Therefore, we propose a multi-functional heat exchanger of absorption cycle.
Disclosure of Invention
The present invention is directed to an absorption cycle multifunctional heat exchanger, which solves the above problems of the prior art.
The invention realizes the purpose through the following technical scheme:
an absorption-type circulating multifunctional heat exchanger comprises a cylinder tube plate, an economizer, an evaporator, an absorber and an absorbent spraying system which are arranged in the cylinder tube plate,
the evaporator and the absorber are arranged on two sides of the central partition plate, the absorbent spraying system and the economizer are arranged on two sides of the bidirectional liquid collector, the absorbent spraying system and the absorber are positioned in the same half barrel, and the economizer and the evaporator are positioned in the same half barrel;
the tube plate of the cylinder body is provided with a circulating water inlet and outlet, a secondary refrigerant inlet and outlet and a liquid refrigerant inlet and outlet, the circulating water inlet and outlet are respectively connected with a tube pass water inlet and outlet end of the absorber, the secondary refrigerant inlet and outlet are respectively connected with a tube pass water inlet and outlet end of the evaporator, the liquid refrigerant inlet and outlet are connected with a tube pass water inlet and outlet end of the economizer, the outlet end of the tube pass of the economizer is an opening which is linearly arranged, and the opening is positioned at the lower end of the tube pass at the bottommost end of the economizer.
As a further optimization scheme of the invention, the bidirectional liquid collector is in a bidirectional inclined louver structure with a high middle part and low ends.
As a further optimization scheme of the invention, the upper side surface of the central clapboard is in a peak shape with a high middle and two low ends.
As a further optimization scheme of the invention, the bottoms of the absorber and the evaporator are both provided with liquid collecting tanks, and the bottom end of the absorber is also provided with a working medium outlet.
As a further optimization scheme of the invention, communication pipelines are respectively arranged between the liquid collecting tank of the evaporator and the absorber and between the liquid collecting tank of the evaporator and the economizer, pumps are arranged on the communication pipelines, and valves are arranged on two groups of communication pipelines at the water outlet ends of the pumps and are used for switching the flow directions leading to the absorber and the economizer.
As a further optimization scheme of the invention, the outlet of the communicating pipeline of the liquid collecting tank of the evaporator, which is communicated with the absorber, is positioned in the liquid collecting tank of the absorber, the communicating pipeline of the liquid collecting tank of the evaporator, which is communicated with the economizer, extends to the lower part of the inner tube pass of the economizer, and the lower end of the communicating pipeline at the tail end is provided with a spraying hole.
As a further optimization scheme of the invention, the two ends of the tube plate of the cylinder are respectively provided with an end enclosure body, an end enclosure clapboard is arranged in the end enclosure body corresponding to the boundary of the economizer, the evaporator and the absorber, and the inner surface of the tube plate of the cylinder, the surface of the central clapboard, the inner surface of the end enclosure body and the surface of the end enclosure clapboard are respectively provided with a heat insulation layer.
As a further optimization scheme of the invention, an evaporator temperature measuring point is also arranged between the evaporator and the economizer and is used for measuring the evaporation temperature.
As a further optimized scheme of the invention, the absorption-cycle multifunctional heat exchanger is an absorption refrigeration cycle heat exchanger or an absorption heating cycle heat exchanger.
The invention has the beneficial effects that: the invention integrates the absorber, the evaporator and the economizer of the absorption type circulating system, reduces the total occupied space of the original plurality of heat exchangers, omits the gas phase pipeline connection among the original three heat exchangers, reduces the gas resistance and optimizes the system arrangement.
Drawings
FIG. 1 is a schematic cross-sectional view of an absorption cycle multi-function heat exchanger provided by the present invention;
FIG. 2 is a schematic side view of an absorption cycle multi-function heat exchanger provided in accordance with the present invention;
fig. 3 is a schematic structural diagram of the absorption-cycle multifunctional heat exchanger head body provided by the invention.
In the figure: 1. a tube plate of the cylinder body; 2. an economizer; 3. an evaporator; 4. an absorber; 5. an absorbent spray system; 6. a central partition; 7. a bidirectional liquid collector; 8. a circulating water inlet and outlet; 9. a secondary refrigerant inlet and outlet; 10. a liquid refrigerant inlet; 11. opening a hole; 12. a liquid collecting tank; 13. a seal head body; 14. a seal head clapboard; 15. a heat-insulating layer; 16. a valve; 17. a pump; 18. and (4) measuring the temperature point of the evaporator.
Detailed Description
The present application will now be described in further detail with reference to the drawings, it should be noted that the following detailed description is given for illustrative purposes only and is not to be construed as limiting the scope of the present application, as those skilled in the art will be able to make numerous insubstantial modifications and adaptations to the present application based on the above disclosure.
As shown in fig. 1 to 2, the absorption-cycle multifunctional heat exchanger of the present embodiment is an absorption refrigeration cycle heat exchanger or an absorption heating cycle heat exchanger;
the device comprises a cylinder tube plate 1, an economizer 2, an evaporator 3, an absorber 4 and an absorbent spraying system 5, wherein the economizer 2, the evaporator 3, the absorber 4 and the absorbent spraying system 5 are arranged in the cylinder tube plate 1;
a vertical central partition plate 6 and a two-way liquid receiving device 7 are arranged in the tube plate 1 of the tube body, the upper side surface of the central partition plate 6 is connected with the lower side surface of the two-way liquid receiving device 7 to form a plate-shaped integral structure, the tube plate 1 of the tube body is divided into two half tubes, the evaporator 3 and the absorber 4 are arranged on two sides of the central partition plate 6, the absorbent spraying system 5 and the economizer 2 are arranged on two sides of the two-way liquid receiving device 7, the absorbent spraying system 5 and the absorber 4 are positioned in the same half tube, and the economizer 2 and the evaporator 3 are positioned in the same half tube; the bidirectional liquid collector 7 is in a bidirectional inclined louver structure with a high middle part and low two ends, can collect liquid in two directions, and can collect fine liquid drops from any direction on the louver structure and flow back to the original direction, so that the absorbent liquid drops sprayed from the side of the absorber 4 are prevented from being sprayed to the side of the evaporator 3, and a small amount of liquid refrigerant carried by the gaseous refrigerant of the evaporator 3 can also be prevented from entering the absorber 4; the upper side surface of the central baffle 6 is in a peak shape with a high middle and two low ends, and plays a role of liquid collection as the bidirectional liquid collector 7.
The tube plate 1 of the cylinder body is provided with a circulating water inlet and outlet 8, a secondary refrigerant inlet and outlet 9 and a liquid refrigerant inlet and outlet, the circulating water inlet and outlet 8 is respectively connected with the tube pass water inlet and outlet end of the absorber 4 and used for the circulating water to enter and exit the tube pass of the absorber 4, the secondary refrigerant inlet and outlet 9 is respectively connected with the tube pass water inlet and outlet end of the evaporator 3 and used for the secondary refrigerant to enter and exit the tube pass of the evaporator 3, the liquid refrigerant inlet 10 is connected with the tube pass water inlet end of the economizer 2, the outlet end of the tube pass of the economizer 2 is a linearly arranged opening 11, the opening 11 is positioned at the lower end of the tube pass at the bottommost end of the economizer 2 and used for the liquid refrigerant to enter the evaporator 3 through high-pressure spraying from the economizer 2, the circulating capacity of;
the bottom of the absorber 4 and the bottom of the evaporator 3 are both provided with a liquid collecting tank 12, the bottom of the absorber 4 is also provided with a working medium outlet, a communicating pipeline is arranged between the evaporator 3 and the shell pass of the absorber 4, the liquid collecting tank 12 of the evaporator 3 is respectively provided with a communicating pipeline between the absorber 4 and the economizer 2, the communicating pipeline is provided with a pump 17, two groups of communicating pipelines at the water outlet end of the pump 17 are both provided with a valve 16 for switching the flow direction leading to the absorber 4 and the economizer 2, on one hand, the absorbent entering the evaporator 3 due to misoperation returns to the absorber 4, and on the other hand, the liquid refrigerant enters the lower part of the economizer 2 from the evaporator 3.
As shown in fig. 2 and 3, the two ends of the tube plate 1 are both provided with a head body 13, a head partition plate 14 is arranged in the head body 13 corresponding to the boundary between the economizer 2 and the evaporator 3 and the absorber 4, and the inner surface of the tube plate 1, the surface of the central partition plate 6, the inner surface of the head body 13 and the surface of the head partition plate 14 are both provided with an insulating layer 15, so that heat transfer between liquids with different temperatures through the tube plate 1 and the central partition plate 6 is prevented, and heat transfer between different liquids through the head body 13 and the head partition plate 14 in the head is prevented.
An evaporator temperature measuring point 18 is also arranged between the evaporator 3 and the economizer 2 and used for measuring the evaporation temperature.
The heat exchange process of the absorber 4, the evaporator 3 and the economizer 2 is as follows: liquid refrigerant enters a tube pass in the economizer 2 through a liquid refrigerant inlet 10, the liquid refrigerant is cooled by utilizing the low temperature of the gaseous refrigerant in the gas phase space of the evaporator 3, so that the liquid refrigerant is evaporated in the evaporator 3 at lower temperature, a better cooling effect is achieved, then the liquid refrigerant is sprayed into the evaporator 3 from an opening hole 11 at the lower end of the tube pass at the bottommost end of the economizer 2 to be evaporated, the liquid refrigerant which is not evaporated enters a liquid collecting tank 12 of the evaporator 3, is converted through a valve 16 and is communicated with a communication pipeline between the evaporator 3 and the economizer 2, so that the liquid refrigerant is sprayed into the evaporator 3 again from a spraying port at the tail end of the communication pipeline to be evaporated into the gaseous refrigerant, the gaseous refrigerant rises to the outer side of the tube pass of the economizer 2 to cool the liquid refrigerant in the tube pass of the economizer 2, and then enters an absorber 4 to be absorbed by an absorbent, and is relatively full of the, the liquid level height does not exist, so that the evaporation pressure is reduced, the evaporation temperature is lower, and the refrigeration effect is improved; the absorbent enters and is sprayed by an absorbent spraying system 5 so as to absorb the gaseous refrigerant entering the absorber 4; the secondary refrigerant enters the tube pass of the evaporator 3 through the inlet of the secondary refrigerant inlet and outlet 9, absorbs the cold energy generated by the evaporation of the liquid refrigerant outside the tube pass of the evaporator 3, and then the secondary refrigerant is discharged from the outlet of the secondary refrigerant inlet and outlet 9; circulating water enters the tube pass of the absorber 4 through the inlet of the circulating water inlet and outlet 8 and takes away heat generated by absorbing gaseous refrigerant by the absorbent, the absorber 4, the evaporator 3 and the economizer 2 are integrated and arranged in the tube plate 1 of the cylinder body, so that the total occupied space of a plurality of original heat exchangers is reduced, the gas phase pipeline connection among the three heat exchangers is saved, the gas resistance is reduced, and the system arrangement is optimized.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Claims (9)
1. The utility model provides an absorption-type circulating multifunctional heat exchanger, includes the barrel tube sheet, and locates economic ware, evaporimeter, absorber and absorbent spraying system in the barrel tube sheet, its characterized in that:
the evaporator and the absorber are arranged on two sides of the central partition plate, the absorbent spraying system and the economizer are arranged on two sides of the bidirectional liquid collector, the absorbent spraying system and the absorber are positioned in the same half barrel, and the economizer and the evaporator are positioned in the same half barrel;
the tube plate of the cylinder body is provided with a circulating water inlet and outlet, a secondary refrigerant inlet and outlet and a liquid refrigerant inlet and outlet, the circulating water inlet and outlet are respectively connected with a tube pass water inlet and outlet end of the absorber, the secondary refrigerant inlet and outlet are respectively connected with a tube pass water inlet and outlet end of the evaporator, the liquid refrigerant inlet and outlet are connected with a tube pass water inlet and outlet end of the economizer, the outlet end of the tube pass of the economizer is an opening which is linearly arranged, and the opening is positioned at the lower end of the tube pass at the bottommost end of the economizer.
2. The absorption-cycle multifunctional heat exchanger as claimed in claim 1, wherein the bidirectional liquid collector is a bidirectional slanted louver structure with a high middle part and two low ends.
3. The multifunctional heat exchanger of claim 2, wherein the upper side of the central partition is in the shape of a peak with a high middle and two low ends.
4. The absorption-cycle multifunctional heat exchanger as claimed in claim 1, wherein the absorber and the evaporator are provided with liquid collecting tanks at the bottom, and the absorber is provided with a working medium outlet at the bottom.
5. The absorption-cycle multifunctional heat exchanger as claimed in claim 4, wherein the liquid collecting tank of the evaporator is provided with a communicating pipeline respectively with the absorber and the economizer, the communicating pipeline is provided with a pump, and two groups of communicating pipelines at the water outlet end of the pump are provided with valves for switching the flow direction to the absorber and the economizer.
6. The absorption-cycle multifunctional heat exchanger as claimed in claim 5, wherein the outlet of the communication pipeline leading from the liquid collecting tank of the evaporator to the absorber is located in the liquid collecting tank of the absorber, the communication pipeline leading from the liquid collecting tank of the evaporator to the economizer extends to the lower part of the inner tube pass of the economizer, and the lower end of the communication pipeline at the tail end is provided with a spray hole.
7. The absorption-cycle multifunctional heat exchanger as claimed in claim 1, wherein the tube plate has two ends each provided with a head body, the head body has a head partition plate inside corresponding to the boundary between the economizer, the evaporator and the absorber, and the tube plate has an inner surface, a center partition plate surface, an inner surface of the head body and the head partition plate surface each provided with a heat insulating layer.
8. The absorption-cycle multifunctional heat exchanger according to claim 1, wherein an evaporator temperature measuring point is further provided between the evaporator and the economizer for measuring the evaporation temperature.
9. The absorption-cycle multifunctional heat exchanger according to any one of claims 1 to 8, wherein the absorption-cycle multifunctional heat exchanger is an absorption refrigeration cycle heat exchanger or an absorption heating cycle heat exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010546839.0A CN111795519B (en) | 2020-06-16 | 2020-06-16 | Absorption type circulating multifunctional heat exchanger |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010546839.0A CN111795519B (en) | 2020-06-16 | 2020-06-16 | Absorption type circulating multifunctional heat exchanger |
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| CN111795519A CN111795519A (en) | 2020-10-20 |
| CN111795519B true CN111795519B (en) | 2021-03-02 |
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| CN202010546839.0A Active CN111795519B (en) | 2020-06-16 | 2020-06-16 | Absorption type circulating multifunctional heat exchanger |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114543395B (en) * | 2020-11-26 | 2024-02-23 | 青岛海尔空调电子有限公司 | Falling film evaporator for refrigeration system and refrigeration system |
| CN113587486B (en) * | 2021-08-10 | 2022-10-21 | 安徽普泛能源技术有限公司 | Absorption type refrigerating system |
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| CN1103476A (en) * | 1993-11-27 | 1995-06-07 | 林茂森 | Full-automatic multifunctional magnetizing three-heat-source normal-pressure heat exchanger |
| CN103604243A (en) * | 2013-11-12 | 2014-02-26 | 清华大学 | Spray-type air-source absorption heat pump |
| CN103868281A (en) * | 2014-03-28 | 2014-06-18 | 常州大学 | Ground source heat pump triple-generation system with one-stage compression and double-stage compression switchable |
| CN104634151A (en) * | 2014-12-24 | 2015-05-20 | 同济大学 | Distributed energy resource station absorption type cold storage and heat storage dual-purpose energy storer |
| CN206771609U (en) * | 2017-06-05 | 2017-12-19 | 山东禄禧新能源科技有限公司 | The air-cooled cold wind solar airconditioning unit of suction-type lithium bromide |
| CN109028652A (en) * | 2018-07-13 | 2018-12-18 | 青岛美克热源塔热泵研究有限公司 | Greenhouse heat source heat pump paddy electricity accumulation of heat block energy source station |
-
2020
- 2020-06-16 CN CN202010546839.0A patent/CN111795519B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1103476A (en) * | 1993-11-27 | 1995-06-07 | 林茂森 | Full-automatic multifunctional magnetizing three-heat-source normal-pressure heat exchanger |
| CN103604243A (en) * | 2013-11-12 | 2014-02-26 | 清华大学 | Spray-type air-source absorption heat pump |
| CN103868281A (en) * | 2014-03-28 | 2014-06-18 | 常州大学 | Ground source heat pump triple-generation system with one-stage compression and double-stage compression switchable |
| CN104634151A (en) * | 2014-12-24 | 2015-05-20 | 同济大学 | Distributed energy resource station absorption type cold storage and heat storage dual-purpose energy storer |
| CN206771609U (en) * | 2017-06-05 | 2017-12-19 | 山东禄禧新能源科技有限公司 | The air-cooled cold wind solar airconditioning unit of suction-type lithium bromide |
| CN109028652A (en) * | 2018-07-13 | 2018-12-18 | 青岛美克热源塔热泵研究有限公司 | Greenhouse heat source heat pump paddy electricity accumulation of heat block energy source station |
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Inventor after: Zhu Linghui Inventor after: Chen Hegen Inventor before: Zhu Linghui |
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Effective date of registration: 20230522 Address after: 230000 building 6, shuimuyuan, Yanhu hi tech R & D base (Tsinghua Science and Technology City, Hefei), West Xiyou Road, North Jinxiu Avenue, Hefei Economic and Technological Development Zone, Anhui Province Patentee after: Anhui pupan Energy Technology Co.,Ltd. Address before: Room 201, 2 / F, Xingfa building, 45 Zhongguancun Street, Haidian District, Beijing Patentee before: Pupan Energy Technology Research Institute (Beijing) Co.,Ltd. |