CN101589278B - Multi-channel heat exchanger with multi-stage expansion device - Google Patents
Multi-channel heat exchanger with multi-stage expansion device Download PDFInfo
- Publication number
- CN101589278B CN101589278B CN200680056541XA CN200680056541A CN101589278B CN 101589278 B CN101589278 B CN 101589278B CN 200680056541X A CN200680056541X A CN 200680056541XA CN 200680056541 A CN200680056541 A CN 200680056541A CN 101589278 B CN101589278 B CN 101589278B
- Authority
- CN
- China
- Prior art keywords
- expansion
- external member
- round nose
- openend
- throttle orifice
- 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
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B39/00—Evaporators; Condensers
- F25B39/02—Evaporators
- F25B39/028—Evaporators having distributing means
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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
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/39—Dispositions with two or more expansion means arranged in series, i.e. multi-stage expansion, on a refrigerant line leading to the same evaporator
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
- F28F9/0246—Arrangements for connecting header boxes with flow lines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
- F28D2021/0068—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for refrigerant cycles
- F28D2021/0071—Evaporators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F2260/00—Heat exchangers or heat exchange elements having special size, e.g. microstructures
- F28F2260/02—Heat exchangers or heat exchange elements having special size, e.g. microstructures having microchannels
Landscapes
- 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
An expansion device for a heat exchanger having a manifold and a plurality of mini-and or micro-channels. The expansion device has an outer element having a plurality of orifices therethrough that is received in the manifold, and an inner element telescopically received in the outer element having at least one orifice therethrough and being in fluid communication with the plurality of orifices. Fluid passing through the at least one orifice and through the plurality of orifices is expanded and reduced in pressure prior to entering the manifold.
Description
Technical field
The present invention relates to a kind of expansion gear that is used for heat exchanger.More specifically, the present invention relates to a kind of expansion gear that is used for passage aisle or micro-channel heat exchanger (MCHX), it provides pressure drop and mixing by a plurality of throttle orifices, thereby improves heat exchanger efficiency.
Background technology
Refrigeration system is to be well known in the modern times, and is ubiquitous in as these industry such as food service industry, chemistry and auto industrys.Heat exchanger obtains the widespread demand of office building and domestic use.These systems worry to lose efficacy or efficient deficiency more commonly very much.
Traditional kind of refrigeration cycle or air-conditioning comprise compressor, condenser, expansion valve, evaporimeter and cold-producing medium, and the evaporation of cold-producing medium produces chilling temperature.In some refrigeration systems, evaporimeter is the small diameter pipeline of series of parallel.When refrigerant fluid when condenser flows through evaporimeter, pressure drop and temperature drop will appear, obtain colder temperature thus.
Cooling system can use the single-phase or dual phase coolant that runs through the loop.When cold-producing medium is single-phase cooling fluid (for example water in the automobile radiators), just do not worry that fluid can be between the phase of expansion and become two-phase afterwards.Yet, in many refrigerant vapor compression systems, when fluid when condenser flows to evaporimeter, the part of fluid will expand into steam.As a result, a part that enters the fluid of evaporimeter is a steam, and it causes low heat exchanger efficiency.This steam problem is known as maldistribution and is to use the common issue with of the heat exchanger of parallel refrigerant stream.The gravity of vapour phase and liquid phase and density contrast have caused this problem.
In passage aisle or micro-channel heat exchanger (MCHX), this worry even can be bigger, because cold-producing medium stream is divided into many small pipelines, here each pipeline and passage aisle all should receive the little and impartial share of total cold-producing medium stream.But because this maldistribution, some pipeline receives more liquid and remaining pipes receives more steaminess.The whole bag of tricks (for example expand and distribute the cold-producing medium that enters in or several mini) can be used to stop maldistribution and obtains pressure drop.
Therefore, need a kind of multi-stage expansion device that is used for minichannel heat exchanger, its a plurality of big throttle orifices generation pressure drops that can use series connection during expansion phase are avoided the above-mentioned mentioned problem that causes the heat exchanger poor efficiency with mixed refrigerant fluid suitably.
Summary of the invention
The objective of the invention is to reduce the maldistribution of the cold-producing medium of the heat exchanger in passage aisle or the micro-channel heat exchanger, increase single channel and multi-channel heat exchanger efficient thus.
Another object of the present invention is by promoting the pressure drop in the exchanger header to reduce the maldistribution of the two-phase flow in passage aisle or the micro-channel heat exchanger.
Another purpose of the present invention provides a kind of hookup that inserts in the exchanger header, and it uses a plurality of big throttle orifices to replace a little throttle orifice to obtain pressure drop.
Another purpose of the present invention provides a pair of supporting connecting tube, and they are joined together provides a kind of repeatedly expansion gear, and this device inserts in the collector to minimize the maldistribution of cold-producing medium.
Another purpose of the present invention provides the repeatedly expansion gear with big throttle orifice, and it can obtain the mixing of very big pressure drop and cold-producing medium and cold-producing medium is supplied to passage aisle or micro-channel evaporator.
Another purpose of the present invention provides has exchanger header moulding and perforation, and it takes at least one expansion gear to improve its pressure drop and mixing before the passage aisle that enters heat exchanger at cold-producing medium or the microchannel tubing further.
Another purpose of the present invention provides a kind of collector with a plurality of openings, and expansion gear inserts in these openings or is incorporated in wherein.
Provide these and other objects and advantage by a kind of expansion gear that is used to have the heat exchanger of collector and a plurality of passage aisle and/or microchannel.This expansion gear has external member, this external member has a plurality of throttle orifices that run through it, and be incorporated in the collector, and telescopically is accommodated in the inner member in the external member, this inner member has at least one throttle orifice of running through it and is communicated with these a plurality of throttle orifice fluids.Fluid flow through this at least one throttle orifice and flows through these a plurality of throttle orifices and obtains expanding and step-down before entering collector.
Description of drawings
By below in conjunction with the accompanying drawing detailed description of the present invention, will find out these and other purpose of the present invention more significantly, wherein:
Fig. 1 shows the heat exchanger according to the first embodiment of the present invention, and it has a plurality of mini and is combined with expansion gear;
Fig. 2 shows the expansion gear according to first embodiment of the invention, and it is inserted in the exchanger header of Fig. 1;
Fig. 3 shows the side view of second structure of expansion gear of the present invention, and it is inserted in and is used for step-down further in the moulding collector; And
Fig. 4 shows the upward view of the punching collector of Fig. 3, and it has the opening of the expansion gear that is used for Fig. 2.
The specific embodiment
Fig. 1 shows a kind of minichannel heat exchanger, represents with Reference numeral 10 generally.Heat exchanger 10 has inlet header 15 and discharges collector 20. Connecting collector 15 and 20 is a series of or a plurality of passage aisles or microchannel tubing 25, and they form the main body of heat exchanger 10.Each passage aisle or microchannel tubing 25 all are small diameter pipelines very, and it forms the main body of heat exchanger 10 and refrigerant conveying 30 during evaporating with other pipeline.
With reference to Fig. 2, show the detail drawing of expansion gear 40.Expansion gear 40 has feed pipe 45, and it receives cold-producing medium 30 from loop before.What be mounted to feed pipe 45 is that first hookup, 50, the first hookups 50 have throttle orifice 55 at its peak or summit.What link to each other with first hookup 50 is second hookup 60.Hookup 60 has a series of or a plurality of throttle orifices 65 at place, its summit around its top, and these a series of or a plurality of throttle orifices 65 are on the point around the summit of coupling 60 or become the position of an angle of 90 degrees with its summit.
When cold-producing medium 30 when feed pipe flows to expansion gear 40, it is incorporated in first hookup 50.When cold-producing medium 30 flows through throttle orifice 55, its experience pressure drop and expansion, and in space 70, mix.When cold-producing medium 30 was discharged by throttle orifice 65, the pressure of cold-producing medium 30 further reduced and is inflated once more.When flowing through the throttle orifice 65 of second hookup 60 before cold-producing medium is entering the mini 25 of heat exchanger 10, cold-producing medium 30 expands and redistributes in collector 15.
Be not inserted at expansion gear 40 under the situation of collector, the cold-producing medium that enters collector and enter passage aisle from feed pipe can become and single-phase opposite two phase fluid.Further, by flowing through the big throttle orifice 65 of a plurality of series connection, just can obtain required overall presure drop.Use two expansion gears 40 although Fig. 1 shows, can use more expansion gear according to system requirements.Further, Fig. 2 shows two hookups 50 and 60 that have throttle orifice 55 and 65 (series connection) respectively, but other throttle orifice or hookup structure also can be used for obtaining the double expansion of cold-producing medium 30.
With reference to Fig. 3 and 4, show second structure of inserting the expansion system in the moulding collector, represent with Reference numeral 70 generally.In this structure, the expansion gear 40 of first embodiment inserts in the moulding collector 85 at a plurality of openings 90 and 95 places.Moulding collector 85 has the circular section, and it is separated thing 102 and is divided into two chambeies, reception cavity 100 and output cavity 105.Reception cavity 100 is taken in the expansion gear 40 that is arranged in each opening 90 and 95.Separator 102 has a series of eyelets 110, though its permission cold-producing medium 30 in expansion gear 40, expanded and step-down also have extra dilation after twice.
Although collector 85 is shown to have the circular section, other cross section also can be used for the step-down that provides identical and the help of expanding.And more eyelet 90 can be located at bigger expansion and the mixing that is used for cold-producing medium in the collector 85.
Although described the present invention, it will be appreciated by those skilled in the art that and to make various changes, and can do equal replacement to parts in the situation that does not deviate from its scope with reference to one or more exemplary embodiments.In addition, can under the situation that does not deviate from its scope, make a lot of remodeling according to instruction of the present invention to adapt to particular condition or material.Therefore, this means that the present invention is not subjected to the restriction of the specific embodiment (a plurality of embodiment) of disclosed enforcement best form of implementation of the present invention, but comprise all within the scope of the appended claims embodiment of falling.
Claims (15)
1. expansion gear that is used to have the heat exchanger of collector and a plurality of passages comprises:
External member, it has a plurality of throttle orifices that run through it, and described external member is incorporated in the collector;
Inner member, it is accommodated in the described external member by telescopically, and described inner member has at least one throttle orifice of running through it and is communicated with described a plurality of throttle orifice fluids, and described inner member also has openend and the round nose relative with described openend; And
Feed pipe, it is carried fluid and is incorporated in the described openend,
Wherein, the described fluid that flows through described at least one throttle orifice that extends through described round nose and flow through described a plurality of throttle orifices obtained expanding and step-down before entering described collector.
2. expansion gear according to claim 1, wherein: described external member is a tubular element.
3. expansion gear according to claim 1, wherein: described inner member is a tubular element.
4. expansion gear according to claim 1, wherein: described external member have round nose and with the described round nose opposing open end of described external member, described a plurality of throttle orifice passes the described round nose of described external member, and described inner member is incorporated in the described openend of described external member.
5. expansion gear according to claim 1, wherein: described fluid is to be accommodated into cold-producing medium in the described inner member by described feed pipe.
6. expansion gear according to claim 1, wherein: the described fluid that flows through described at least one throttle orifice and flow through described a plurality of throttle orifices has carried out at least twice expansion and step-down.
7. expansion gear that is used for heat exchanger, this heat exchanger have collector and are connected to a plurality of passage aisles or the microchannel of described collector, and this expansion gear comprises:
Outer expansion tube with a plurality of throttle orifices;
Be accommodated in the interior expansion tube in the described outer expansion tube, described interior expansion tube has openend and round nose, and described openend is relative with described round nose; And
Feed pipe, its refrigerant conveying also is incorporated in the described openend,
Wherein, flow out described in expansion tube and the cold-producing medium that enters collector that extends through at least one throttle orifice of described round nose and flow out described outer expansion tube carried out at least twice expansion and step-down, before cold-producing medium enters described a plurality of passage aisle or microchannel, mix thus.
8. expansion gear according to claim 7, wherein: described outer expansion tube have round nose and with the described round nose opposing open end of described outer expansion tube, described a plurality of throttle orifice passes the described round nose of described outer expansion tube, and described interior expansion tube is incorporated in the described openend of described outer expansion tube.
One kind be used to have a plurality of little-expansion system of the heat exchanger of microdilatancy passage, be used for expanding, it comprises:
Collector, it has the separator between two chambeies and described two chambeies, and described separator has a series of eyelets that run through it; One of described two chambeies can take in described a plurality of little-the microdilatancy passage;
At least one external member, it is incorporated in another of described two chambeies, and described at least one external member has a plurality of throttle orifices that run through it;
Inner member, it is incorporated in described at least one external member, and described inner member has openend with the round nose relative with described openend and have at least one throttle orifice that runs through it, and
Feed pipe, its refrigerant conveying also is incorporated in the described openend,
Wherein, the cold-producing medium that enters described inner member and expand by described at least one throttle orifice that extends through described round nose, described a plurality of throttle orifices and described serial eyelet, by step-down and expansion, therefore before entering described a plurality of inflation channel, mix.
10. expansion system according to claim 9, wherein: described at least one external member is a plurality of external members.
11. expansion system according to claim 9, wherein: described at least one external member is a tubular element.
12. expansion system according to claim 9, wherein: described inner member is a tubular element.
13. expansion system according to claim 9, wherein: described at least one external member have round nose and with the described round nose opposing open end of described at least one external member, described a plurality of throttle orifice passes the described round nose of described at least one external member, and described inner member is incorporated in the described openend of described at least one external member.
14. expansion system according to claim 9, wherein: described fluid is to be received in cold-producing medium in the described inner member by described feed pipe.
15. expansion system according to claim 9, wherein: the described fluid that flows through described at least one throttle orifice, flows through described a plurality of throttle orifice and flow through described a plurality of eyelets is inflated for three times and step-down at least.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US85138206P | 2006-10-13 | 2006-10-13 | |
| US60/851,382 | 2006-10-13 | ||
| PCT/US2006/048347 WO2008045111A1 (en) | 2006-10-13 | 2006-12-19 | Multi-channel heat exchanger with multi-stage expansion device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101589278A CN101589278A (en) | 2009-11-25 |
| CN101589278B true CN101589278B (en) | 2011-07-06 |
Family
ID=39283137
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200680056541XA Expired - Fee Related CN101589278B (en) | 2006-10-13 | 2006-12-19 | Multi-channel heat exchanger with multi-stage expansion device |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20100037652A1 (en) |
| EP (1) | EP2079968A4 (en) |
| CN (1) | CN101589278B (en) |
| HK (1) | HK1138354A1 (en) |
| WO (1) | WO2008045111A1 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009018150A1 (en) | 2007-07-27 | 2009-02-05 | Johnson Controls Technology Company | Multichannel heat exchanger |
| US8943854B2 (en) * | 2009-01-06 | 2015-02-03 | Danfoss Qinbao (Hangzhou) Plate Heat Exchanger Company Limited | Heat exchanger and air condition system |
| CN103712376B (en) * | 2013-12-30 | 2016-03-30 | 杭州三花微通道换热器有限公司 | Be integrated with the heat exchanger of throttling arrangement and there is its refrigeration system |
| US11022382B2 (en) | 2018-03-08 | 2021-06-01 | Johnson Controls Technology Company | System and method for heat exchanger of an HVAC and R system |
| WO2019186674A1 (en) * | 2018-03-27 | 2019-10-03 | 東芝キヤリア株式会社 | Heat exchanger, heat exchange module, and refrigeration cycle |
| US11879676B2 (en) | 2021-07-30 | 2024-01-23 | Danfoss A/S | Thermal expansion valve for a heat exchanger and heat exchanger with a thermal expansion valve |
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2006
- 2006-12-19 EP EP06845767.0A patent/EP2079968A4/en not_active Withdrawn
- 2006-12-19 WO PCT/US2006/048347 patent/WO2008045111A1/en active Application Filing
- 2006-12-19 US US12/445,441 patent/US20100037652A1/en not_active Abandoned
- 2006-12-19 CN CN200680056541XA patent/CN101589278B/en not_active Expired - Fee Related
-
2010
- 2010-04-29 HK HK10104237.3A patent/HK1138354A1/en not_active IP Right Cessation
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Also Published As
| Publication number | Publication date |
|---|---|
| HK1138354A1 (en) | 2010-08-20 |
| WO2008045111A1 (en) | 2008-04-17 |
| EP2079968A4 (en) | 2013-05-01 |
| EP2079968A1 (en) | 2009-07-22 |
| US20100037652A1 (en) | 2010-02-18 |
| CN101589278A (en) | 2009-11-25 |
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