CN102401512B - Parallel-flow heat exchanger - Google Patents
Parallel-flow heat exchanger Download PDFInfo
- Publication number
- CN102401512B CN102401512B CN201110370475.6A CN201110370475A CN102401512B CN 102401512 B CN102401512 B CN 102401512B CN 201110370475 A CN201110370475 A CN 201110370475A CN 102401512 B CN102401512 B CN 102401512B
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- header
- pipe
- refrigerant pipe
- hydraulic fluid
- fluid port
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Classifications
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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
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
A kind of parallel-flow heat exchanger, comprise header and be connected to the several flat tubes between two headers, between adjacent flat tube, be provided with fin, its header is provided with the refrigerant pipe with its internal communication, and refrigerant pipe stretches into header and is provided with the oily structure of drawing near header inwall bottom. Refrigerant pipe inserts into the inner from the bottom of header, draws oily structure and be to be arranged on refrigerant pipe and to stretch into tube wall in header and draw hydraulic fluid port A lower than its refrigerant pipe mouth of pipe A. Or refrigerant pipe inserts into the inner from the sidepiece of header, draw oily structure and be refrigerant pipe and stretch into one end in header to downward-extension and near the refrigerant pipe mouth of pipe B of header tube wall. Or refrigerant pipe is inserted in it from mouth of pipe level or the inclination of header, and form top and be furnished with the distributing pipe of through hole, draw oily structure and be arranged on distributing pipe bottom draw hydraulic fluid port B. Refrigeration oil in parallel-flow heat exchanger of the present invention can, along with the flowing of refrigerant, enter into compressor normal circulation from header, avoids header inner accumulated refrigeration oil to hinder the circulation of air-conditioning system.
Description
Technical field
The present invention relates to a kind of parallel-flow heat exchanger.
Background technology
Parallel-flow heat exchanger, as the efficient heat exchanger of one, is used to increasing field. As thisCompany discloses one on November 2nd, 2011 in Chinese patent literature CN102230693AThe parallel-flow heat exchanger that heat exchange efficiency is high, comprises header, lower header, is arranged on two headersBetween several flat tubes, in lower header, be fixed with flow control plate, this flow control plate is divided into headerOne cavity and the second cavity, be provided with refrigerant pipe interface on the wall of the first cavity, the second cavity and flatPipe is communicated with, and it is characterized in that, described flow control plate is provided with at least 3 intercommunicating pores, by the first cavity andThe second cavity is communicated with, and wherein has at least the spacing of an intercommunicating pore and adjacent intercommunicating pore to be different from otherThe spacing of adjacent intercommunicating pore. The parallel-flow heat exchanger of this structure can make the situation different at cold medium fluxUnder, uniformity mobile in parallel-flow heat exchanger improves, thereby improves heat exchange efficiency; Can meetThe mobile air-conditioning changing of the such refrigerant of convertible frequency air-conditioner has higher efficiency. Meanwhile, install more convenientWith stable, in the situation that realizing reasonable current-sharing, it is fewer that flow resistance increases.
But, in the time that parallel-flow heat exchanger uses as condenser for air conditioner, can be in refrigerantProduce gathering of refrigeration oil, particularly under worst cold case, because the solubility of refrigeration oil and refrigerant is subject toTemperature impact is larger, has more refrigeration oil and freeze-outs, and accumulate in parallel-flow heat exchanger, makesBecome parallel-flow heat exchanger inner product oil. Because the header intracavity space of parallel-flow heat exchanger is larger, whenRefrigeration oil cannot enter into coolant circulating system normal circulation, will cause the refrigeration oil of compressor to subtractFew, reduce the refrigerant flowing space in header and the blending space of refrigerant simultaneously. When for a long time as coldCondenser uses, and likely can cause compressor oil starvation to burn out, and how to avoid cold in parallel-flow heat exchangerFreeze oily gathering, make refrigeration oil can enter into smoothly coolant circulating system normal circulation, become urgentlyProblem to be solved.
Summary of the invention
Object of the present invention aim to provide a kind of simple and reasonable, connect closely, flow resistance is little,The parallel-flow heat exchanger that heat exchange efficiency is high, can avoid refrigeration oil to assemble, of the prior art to overcomeFoot part.
By a kind of parallel-flow heat exchanger of this object design, comprise header and be connected to two headersBetween several flat tubes, between adjacent flat tube, be provided with fin, its architectural feature be header be provided withThe refrigerant pipe of its internal communication, described refrigerant pipe stretches into header and is provided with near header inwall bottomDraw oily structure.
Described refrigerant pipe inserts into the inner from the bottom of header, draws oily structure and stretches into for being arranged on refrigerant pipeTube wall in header and draw hydraulic fluid port A lower than its refrigerant pipe mouth of pipe A. Draw hydraulic fluid port A lowest part withThe distance of header tube wall lowest part is H, and H is 0.01-4.5 millimeter.
Described refrigerant pipe inserts into the inner from the sidepiece of header, and drawing oily structure is that refrigerant pipe stretches into headerInterior one end is to the refrigerant pipe mouth of pipe B of downward-extension and close header tube wall. Refrigerant pipe mouth of pipe B is for flatHorn shape or inclination, pipe mouth angle is 0-90 degree. Refrigerant pipe mouth of pipe B lowest part and header tube wallThe distance of lowest part is H ', and H ' is 0.01-4.5 millimeter.
Described distributing pipe, for being horizontally disposed with and bottom is plugged with arm, drawing hydraulic fluid port B and is positioned on arm, orPerson's distributing pipe, for being obliquely installed and endcapped, draws the end bottom that hydraulic fluid port B is positioned at.
Described distributing pipe bottom is plugged with arm, draws hydraulic fluid port B and is positioned on arm, draws the opening of hydraulic fluid port BAngle is 0-90 degree, or the endcapped of distributing pipe, draws the end bottom that hydraulic fluid port B is positioned at. DrawThe distance of hydraulic fluid port B lowest part and header tube wall lowest part is H ", H " be 0.01-4.5 millimeter.
Describedly draw oily structure and also comprise screen pack disposed thereon.
By adopting technique scheme, the present invention is provided with and can draws oil backflow on parallel-flow heat exchangerCondenser pipe, refrigeration oil can along with refrigerant flow, enter into compressor from header and normally followRing (coolant circulating system), avoids header inner accumulated refrigeration oil to hinder the circulation of air-conditioning system, logicalCross and control the distance of drawing oil machine structure (drawing hydraulic fluid port or the refrigerant mouth of pipe) and header tube wall, can reduce impurityFoul stops up and draws oil machine structure (drawing hydraulic fluid port or the refrigerant mouth of pipe), and the refrigerant simultaneously reducing in refrigerant pipe flows toWhen header, the impact of the refrigerant of outflow on air-conditioning system. It also has simple and reasonable, connectionThe feature that closely, flow resistance is little, heat exchange efficiency is high, the scope of application is wide.
Brief description of the drawings
Fig. 1 is the front view of first embodiment of the invention parallel-flow heat exchanger;
Fig. 2 is the stereogram (broken section) that the first embodiment header is connected with refrigerant pipe;
Fig. 3 is the cutaway view of Fig. 2.
Fig. 4 is the cutaway view that the second embodiment header is connected with refrigerant pipe.
Fig. 5 is the stereogram that the 3rd embodiment header is connected with refrigerant pipe;
Fig. 6 is the cutaway view of Fig. 5.
Fig. 7 is the cutaway view that the 4th embodiment header is connected with refrigerant pipe.
Fig. 8 is the cutaway view that the 5th embodiment header is connected with refrigerant pipe.
Fig. 9 is the cutaway view that the 6th embodiment header is connected with refrigerant pipe.
In figure: 1 is header, 2 is refrigerant pipe, and 3 for drawing hydraulic fluid port A, and 3 ' for drawing hydraulic fluid port B, and 4 areArm, 5 is distributing pipe, and 6 is through hole, and 7 is refrigerant pipe interface, and 8 is oil collecting zone, 9 is end cap;10 is refrigerant pipe mouth of pipe A, and 10 ' is refrigerant pipe mouth of pipe B, and 11 is flat tube.
Detailed description of the invention
Below in conjunction with drawings and Examples, the invention will be further described.
The first embodiment
Referring to Fig. 1-Fig. 3, this parallel-flow heat exchanger, comprises header 1 and is connected to two headersSeveral flat tubes 11 between 1, are provided with fin (not marking in figure), its afflux between adjacent flat tube 11Pipe 1 is provided with the refrigerant pipe 2 with its internal communication, and described refrigerant pipe 2 is provided with near header 1Inwall bottom draw oily structure.
The header 1 of the present embodiment is horizontally disposed, and flat tube 11 vertically arranges, refrigerant pipe 2 is from affluxThe bottom of pipe 1 inserts into the inner, and drawing oily structure is to be arranged on refrigerant pipe 2 to stretch into the tube wall in header 1(being that refrigerant pipe 2 inserts the part in header 1) and (lean on lower than its refrigerant pipe mouth of pipe A10The lower oil collecting zone 8 of nearly header 1 inwall) draw hydraulic fluid port A3, draw hydraulic fluid port A3 and lead to refrigerant pipe2 passage.
In the time that parallel-flow heat exchanger uses as evaporimeter, refrigerant is by the refrigerant pipe mouth of pipe of refrigerant pipe 210 enter in header 1, and some refrigerant also can enter header 1 by drawing hydraulic fluid port A3;In the time that parallel-flow heat exchanger uses as condenser, liquid refrigerant can enter into the refrigerant mouth of pipe 10,Return to compressor from refrigerant pipe 2; The refrigeration oil that condensation process produces, because density is larger, and is pooled toThe lower oil collecting zone 8 of header 1 inwall, owing to drawing, the aperture position of hydraulic fluid port A3 is lower, can beCompressor is drawn back in oil-collecting in the lower oil collecting zone 8 of header 1 inwall, thereby reduces refrigeration oil at collectionCollecting in stream pipe 1, reduce the risk of compressor oil starvation.
From draw hydraulic fluid port A3 edge to the distance of the lowest part of the lower oil collecting zone 8 of header internal faceFor H (distance of drawing hydraulic fluid port A3 lowest part and header 1 tube wall lowest part is H), the model of HEnclose the millimeter for 0.01-4.5, in the time that the amount of oil-collecting is greater than H, just has refrigeration oil and flow into and draw hydraulic fluid portIn A3. When H too hour, can cause the difficulty of processing and manufacturing, easily produce waste product, when H valueWhen larger, the oil-collecting amount in pipe increases, and therefore H is 0.5 millimeter in the present embodiment, is easy to make coldFreeze oil and enter in refrigerant pipe, also avoid the pollutant in system, as welding slag etc., enter into refrigerant and followIn loop systems.
The second embodiment
Referring to Fig. 4, this parallel-flow heat exchanger, is that with the first embodiment main distinction its concurrent flow changesThe set-up mode of hot device is vertically to arrange, and is vertically to arrange with the header 1 of refrigerant pipe, flat tube11 are horizontally disposed with. On the end cap 9 of header 1, be provided with refrigerant pipe interface 7, refrigerant pipe 2 is from thisInterface access header 1. Wherein, drawing hydraulic fluid port A3 is positioned at refrigerant pipe 2 and approaches header 1 inwallThe position of the lower oil collecting zone 8 of face, draws the circular hole of being shaped as of hydraulic fluid port A3, the hole of other shapes,Draw oily function if can realize, all, in protection scope of the present invention, its spacing H (does not note in figureBright) be 0.02 millimeter, the height that it adopts, is also to enter into refrigerant in order to reduce welding impurityIn the circulatory system. Other do not state part, with the first embodiment, no longer repeat.
The 3rd embodiment
Referring to Fig. 5-6, this parallel-flow heat exchanger, it is that with the first embodiment main distinction it is parallelHeader 1 side of stream heat exchanger is provided with refrigerant pipe 2, refrigerant pipe interface (in figure for marking)On the side wall surface of header 1, refrigerant pipe 2 inserts into the inner from the sidepiece of header 1. Draw oil knotStructure is that refrigerant pipe 2 stretches into one end in header 1 to downward-extension (bending) and near header 1The refrigerant pipe mouth of pipe B10 ' of tube wall, this mouth of pipe is positioned at 8 places, lower oil collecting zone of header internal face,The distance of refrigerant pipe mouth of pipe B10 ' lowest part and header 1 tube wall lowest part is H ', and H ' is 0.01-4.5 millimeters, the present embodiment wherein H ' is 4.5 millimeters, because the flow of refrigerant pipe is larger,So when H hour, can be that refrigerant pipe is made a slip of the tongue in approaching header 1 internal face, and reduce to affluxManage mobile area, increased refrigerant and flow through the resistance of this mouth of pipe; Refrigerant pipe mouth of pipe B10 ' simultaneouslyFor straight angle shape, refrigerant pipe mouth of pipe B10 ' is parallel with the inwall of header 1 like this, can avoid impurityFoul enters, stops up air-conditioning system. Other do not state part, with the first embodiment, no longer repeat.
The 4th embodiment
Referring to Fig. 7, this parallel-flow heat exchanger, itself and the second embodiment main distinction are its concurrent flowHeader 1 side of heat exchanger is provided with refrigerant pipe 2, and refrigerant pipe interface 7 is positioned at the side of header 1On wall, refrigerant pipe 2 inserts into the inner from the sidepiece of header 1. Drawing oily structure is refrigerant pipe 2Stretch into one end in header 1 to downward-extension (bending) and near the refrigerant pipe pipe of header 1 tube wallMouth B10 ', this mouth of pipe is positioned at 8 places, lower oil collecting zone of header internal face, refrigerant pipe mouth of pipe B10 'The distance of lowest part and header 1 tube wall lowest part is H ', and H ' is 0.01-4.5 millimeter, this realityExecute example wherein H ' be 1.5 millimeters, because the flow of refrigerant pipe is larger, it has adopted larger HDistance, can reduce flow resistance; Refrigerant pipe mouth of pipe B10 ' is inclination simultaneously, the present embodimentPipe mouth angle a is preferably 30 degree, and the internal face of the refrigerant mouth of pipe and lower is that the high side of a side is low like this,Refrigerant is easy to from flowing out apart from eminence with internal face, and, in the time there is larger impurity foul, noBe easy to stop up. Other do not state part, with the second embodiment, no longer repeat.
The 5th embodiment
Referring to Fig. 8, this parallel-flow heat exchanger, itself and the first embodiment main distinction are its refrigerant pipe2 are inserted in it from the mouth of pipe level of header 1, and form top and be furnished with the distributing pipe 5 of through hole 6,Enter into more equably flat tube 11 to realize refrigerant. Draw oily structure for being arranged on distributing pipe 5 bottomsArm 4 and draw hydraulic fluid port B3 ', refrigerant pipe 2 enters from header 1 end cap (not marking in figure)Enter header 1, because end cap 9 has certain thickness, cause distributing pipe 5 and header 1 inwall to haveCertain spacing, the through hole 6 of existing distributing pipe 5 can not be effectively combining in 8 places, lower oil collecting zoneOil effectively sucks in coolant circulating system, in the present embodiment, at distributing pipe 5 for being horizontally disposed with andBottom is plugged with arm 4, and arm 4 is provided with and draws hydraulic fluid port B3 ', and this draws hydraulic fluid port B3 ' and is positioned at collection8 places, lower oil collecting zone of stream pipe 1 inwall, both distances are H ", H " be 0.01-4.5 millimeter.When refrigerant is during from distributing pipe 5 interior rapid flow, can form low in arm 4 and the junction of distributing pipe 5Press, and the low pressure forming can effectively be incorporated into the oil-collecting at this place the refrigerant that draws hydraulic fluid port 3 placesIn coolant circulating system. H in the present embodiment " be 0.01 millimeter, it draws the opening of hydraulic fluid port B3 'For inclination, the opening angle that the present embodiment draws hydraulic fluid port B3 ' is preferably 15 degree, and refrigerant can be abundantApproach oil collecting zone 8, and draw hydraulic fluid port 3 and have a certain degree with the plane of header internal face bottom,Can draw and avoid impurity foul to stop up oily time drawing hydraulic fluid port. Other do not state part, with the first embodiment,No longer repeat.
The 6th embodiment
Referring to Fig. 9, this parallel-flow heat exchanger, itself and the 5th embodiment main distinction are its refrigerant pipe2 mouths of pipe from header 1 tilt to be inserted in it, and distributing pipe 5, for being obliquely installed and endcapped, draws, there is not perforate the end bottom that hydraulic fluid port B3 ' is positioned at the downside of distributing pipe 5, is conducive to from drawing oilThe refrigeration oil that mouth B3 ' enters can be transported to refrigerant pipe 2, thereby enters coolant circulating system. ItsH in middle the present embodiment " be 0.5mm, the angle of inclination of drawing hydraulic fluid port B3 ' is 3 degree, draws hydraulic fluid port B3 'Processing more convenient, effectively refrigeration oil is introduced in distributing pipe 5 simultaneously, be finally incorporated into refrigerant systemIn system. Other do not state part, with the 5th embodiment, no longer repeat.
The 7th embodiment
This parallel-flow heat exchanger, itself and the first embodiment main distinction are to draw oil port and are provided with filtrationNet, this screen pack is the impurity foul in filtration system effectively, avoids entering into coolant system,The security of raising system.
Claims (5)
1. a parallel-flow heat exchanger, comprises header (1) and is connected to the several flat tubes (11) between two headers (1),Adjacent flat tube is provided with fin between (11), it is characterized in that header (1) is provided with and the refrigerant pipe (2) of its internal communication, described inRefrigerant pipe (2) stretches into header (1) and is provided with the oily structure of drawing near header (1) inwall bottom,
Described refrigerant pipe (2) inserts into the inner from the bottom of header (1), draws oily structure and stretches into header for being arranged on refrigerant pipe (2)(1) tube wall in and lower than its refrigerant pipe mouth of pipe A (10) draw hydraulic fluid port A (3), or
Described refrigerant pipe (2) is inserted in it from mouth of pipe level or the inclination of header (1), and forms top and be furnished with through hole (6)Distributing pipe (5), draw oily structure and draw hydraulic fluid port B (3 ') for being arranged on bottom distributing pipe (5).
2. parallel-flow heat exchanger according to claim 1, is characterized in that the bottom of described refrigerant pipe (2) from header (1)Insert into the inner, draw oily structure for being arranged on refrigerant pipe (2) and stretching into tube wall in header (1) and lower than its refrigerant pipe mouth of pipeA (10) draws hydraulic fluid port A (3), described in draw hydraulic fluid port A (3) lowest part and header (1) tube wall lowest part distance be H, H is0.01-4.5 millimeter.
3. parallel-flow heat exchanger according to claim 1, is characterized in that the mouth of pipe of described refrigerant pipe (2) from header (1)Level or inclination are inserted in it, and form the distributing pipe (5) that top is furnished with through hole (6), draw oily structure for being arranged on distributing pipe(5) bottom draw hydraulic fluid port B (3 '), described distributing pipe (5), for being horizontally disposed with and bottom is plugged with arm (4), draws hydraulic fluid port B (3 ')Be positioned at arm (4) upper, the opening angle that draws hydraulic fluid port B (3 ') is 0-90 degree, or distributing pipe (5) is for being obliquely installed and end envelopeClose, draw hydraulic fluid port B (3 ') and be positioned at the end bottom of distributing pipe (5).
4. parallel-flow heat exchanger according to claim 3, draws hydraulic fluid port B (3 ') lowest part and header described in it is characterized in that(1) distance of tube wall lowest part is H ", H " be 0.01-4.5 millimeter.
5. according to the parallel-flow heat exchanger described in claim 2 or 4, described in it is characterized in that, draw oily structure and also comprise disposed thereonScreen pack.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610225039.2A CN105890233B (en) | 2011-11-18 | 2011-11-18 | Parallel-flow heat exchanger |
| CN201110370475.6A CN102401512B (en) | 2011-11-18 | 2011-11-18 | Parallel-flow heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110370475.6A CN102401512B (en) | 2011-11-18 | 2011-11-18 | Parallel-flow heat exchanger |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610225039.2A Division CN105890233B (en) | 2011-11-18 | 2011-11-18 | Parallel-flow heat exchanger |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102401512A CN102401512A (en) | 2012-04-04 |
| CN102401512B true CN102401512B (en) | 2016-05-11 |
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Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610225039.2A Active CN105890233B (en) | 2011-11-18 | 2011-11-18 | Parallel-flow heat exchanger |
| CN201110370475.6A Expired - Fee Related CN102401512B (en) | 2011-11-18 | 2011-11-18 | Parallel-flow heat exchanger |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610225039.2A Active CN105890233B (en) | 2011-11-18 | 2011-11-18 | Parallel-flow heat exchanger |
Country Status (1)
| Country | Link |
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| CN (2) | CN105890233B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111912283A (en) * | 2020-09-04 | 2020-11-10 | 浙江盾安热工科技有限公司 | Liquid separation structure and heat exchanger |
| CN112629307A (en) * | 2021-01-05 | 2021-04-09 | 珠海格力电器股份有限公司 | Interpolation injection pipe subassembly and microchannel heat exchanger |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201436519U (en) * | 2009-05-08 | 2010-04-07 | 上海瀚艺冷冻机械有限公司 | Dual purpose vertical pot-type heat exchanger for evaporator and condenser |
| CN102003843A (en) * | 2010-11-30 | 2011-04-06 | 江苏兆胜空调有限公司 | Direct type evaporator capable of automatically returning oil |
| CN201983527U (en) * | 2010-11-18 | 2011-09-21 | 珠海格力电器股份有限公司 | Oil return device of partial heat recovery air cooling unit |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100776075B1 (en) * | 2001-05-14 | 2007-11-16 | 한라공조주식회사 | Condenser in one form with oil separator |
| JP2005024188A (en) * | 2003-07-03 | 2005-01-27 | Matsushita Electric Ind Co Ltd | Heat exchanger |
| JP2006226590A (en) * | 2005-02-17 | 2006-08-31 | Matsushita Electric Ind Co Ltd | Refrigeration cycle device |
| WO2009012795A1 (en) * | 2007-07-24 | 2009-01-29 | Carrier Corrporation | Manifold for a multi-compressor refrigeration system |
| CN201104059Y (en) * | 2007-09-05 | 2008-08-20 | 骆宣佐 | Multi-medium refrigeration cocurrent flow type condenser |
| CN201110725Y (en) * | 2007-11-05 | 2008-09-03 | 陈苏红 | Integrated condenser of automobile speed variator oil cold device and air conditioner |
| CN101464081A (en) * | 2008-12-31 | 2009-06-24 | 李世岗 | Siphon type gas-liquid separation and oil return apparatus in parallel compression refrigeration units |
| CN101936670B (en) * | 2009-06-30 | 2013-05-15 | 王磊 | Heat exchanger with micro-channel, parallel-flow and all-aluminum flat pipe welding structure and application |
-
2011
- 2011-11-18 CN CN201610225039.2A patent/CN105890233B/en active Active
- 2011-11-18 CN CN201110370475.6A patent/CN102401512B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201436519U (en) * | 2009-05-08 | 2010-04-07 | 上海瀚艺冷冻机械有限公司 | Dual purpose vertical pot-type heat exchanger for evaporator and condenser |
| CN201983527U (en) * | 2010-11-18 | 2011-09-21 | 珠海格力电器股份有限公司 | Oil return device of partial heat recovery air cooling unit |
| CN102003843A (en) * | 2010-11-30 | 2011-04-06 | 江苏兆胜空调有限公司 | Direct type evaporator capable of automatically returning oil |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105890233B (en) | 2018-06-29 |
| CN102401512A (en) | 2012-04-04 |
| CN105890233A (en) | 2016-08-24 |
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Owner name: MIDEA GROUP CO., LTD. Free format text: FORMER OWNER: MEIDI ELECTRIC APPLIANCES CO., LTD., GUANGDONG Effective date: 20131216 |
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Effective date of registration: 20131216 Address after: 528311 Guangdong, Foshan, Beijiao, the United States, the United States and the United States on the avenue of the United States, the headquarters of the United States building B floor, District, 26-28 Applicant after: Midea Group Co., Ltd. Address before: 528311, the beautiful headquarters building, 6 beautiful avenue, Beijiao Town, Shunde District, Guangdong, Foshan Applicant before: Meidi Electric Appliances Co., Ltd., Guangdong |
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Granted publication date: 20160511 Termination date: 20191118 |