US20100242535A1 - Refrigerant distributor for heat exchanger and heat exchanger - Google Patents

Refrigerant distributor for heat exchanger and heat exchanger Download PDF

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Publication number
US20100242535A1
US20100242535A1 US12/732,027 US73202710A US2010242535A1 US 20100242535 A1 US20100242535 A1 US 20100242535A1 US 73202710 A US73202710 A US 73202710A US 2010242535 A1 US2010242535 A1 US 2010242535A1
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US
United States
Prior art keywords
pipe
heat exchanger
refrigerant
distributor
inlet
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.)
Abandoned
Application number
US12/732,027
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English (en)
Inventor
Jiang Jianlong
Lu Xiangxun
Lin-Jie Huang
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sanhua Hangzhou Micro Channel Heat Exchanger Co Ltd
Danfoss AS
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Assigned to Danfoss Sanhua (Hangzhou) Micro Channel Heat Exchanger Co., Ltd reassignment Danfoss Sanhua (Hangzhou) Micro Channel Heat Exchanger Co., Ltd ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HUANG, LIN-JIE, JIANLONG, JIANG, XIANGXUN, LU
Publication of US20100242535A1 publication Critical patent/US20100242535A1/en
Assigned to DANFOSS A/S, SANHUA HOLDING GROUP CO., LTD. reassignment DANFOSS A/S ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: Danfoss Sanhua (Hangzhou) Micro Channel Heat Exchanger Co., Ltd
Assigned to SANHUA (HANGZHOU) MICRO CHANNEL HEAT EXCHANGER CO. reassignment SANHUA (HANGZHOU) MICRO CHANNEL HEAT EXCHANGER CO. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SANHUA HOLDING GROUP CO., LTD
Abandoned legal-status Critical Current

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Classifications

    • 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
    • F28F9/026—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits
    • F28F9/027—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits in the form of distribution pipes
    • F28F9/0273—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits in the form of distribution pipes with multiple holes
    • 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

Definitions

  • the present invention relates to a refrigerant distributor for a heat exchanger and a heat exchanger having the refrigerant distributor.
  • a conventional micro-channel heat exchanger 2 ′ generally comprises micro-channels or flat tubes 5 , fins 4 disposed between the adjacent micro-channels or flat tubes 5 , an inlet manifold 3 and an outlet manifold (not shown) disposed at ends of the micro-channels or flat tubes 5 respectively, and a refrigerant distributor 1 ′ disposed in the inlet manifold 3 as shown in FIGS. 1-2 .
  • the refrigerant distributor 1 ′ is disposed at a side of the heat exchanger 2 ′ to distribute refrigerant.
  • the distributor 1 ′ may have a portion extending out of the inlet manifold 3 as shown in FIG. 1 or may have no portion extending out of the inlet manifold 3 .
  • the distributor 1 ′ is composed of a cylindrical pipe that is inserted into the inlet manifold 3 , and a plurality of outlets 8 with the same size are arranged in the cylindrical pipe at the same intervals in a longitudinal direction of the pipe as shown in FIGS. 1-2 .
  • Refrigerant flows from the outlets 8 of the distributor 1 ′ near the inlet 7 at a high flow rate so that more refrigerant is distributed, but refrigerant flows from the outlets 8 of the distributor 1 ′ far from the inlet 7 at a low flow rate so that less refrigerant is distributed.
  • the above distributor design is disadvantageous in that the flow rate of the refrigerant gradually decreases in a refrigerant flow direction R through the distributor 1 ′, where a diameter (i.e., a cross-section area) of the pipe is uniform along its length.
  • the flow speed of the refrigerant gradually reduces in the refrigerant flow direction R and thus the flow rate of the refrigerant flowing from the outlets with the same size is decreased. More refrigerant is distributed from the outlets near the inlet, and less refrigerant is distributed from the outlets far from the inlet. Furthermore, after the flow speed reduces, the gas and liquid tend to be separated from each other to cause non-uniform distribution of the refrigerant.
  • a refrigerant distributor for a heat exchanger.
  • the distributor comprises: a pipe having an inlet disposed generally at one end of the pipe, refrigerant flowing into the pipe through the inlet, wherein a cross-section of a flow passage within the pipe gradually decreases from the one end to the other end of the pipe.
  • a heat exchanger comprising a refrigerant distributor disposed at a side of the heat exchanger to distribute refrigerant, wherein the refrigerant distributor comprises: a pipe having an inlet disposed generally at one end of the pipe, refrigerant flowing into the pipe through the inlet, wherein a cross-section of a flow passage within the pipe gradually decreases from the one end to the other end of the pipe.
  • FIG. 1 is a conventional micro-channel heat exchanger.
  • FIG. 2 is a sectional view taken along line A-A of FIG. 1 .
  • FIG. 3 is a schematic view showing a micro-channel heat exchanger according to a first embodiment of the present invention.
  • FIG. 4 is a schematic view showing a refrigerant distributor for a micro-channel heat exchanger according to the first embodiment of the present invention.
  • FIG. 5 is a schematic view showing a refrigerant distributor for a micro-channel heat exchanger according to a second embodiment of the present invention.
  • FIG. 6 is a schematic view showing a micro-channel heat exchanger according to a third embodiment of the present invention.
  • FIG. 7 is a schematic view showing a refrigerant distributor for a micro-channel heat exchanger according to the third embodiment of the present invention.
  • FIG. 8 is a schematic view showing a micro-channel heat exchanger according to the third embodiment of the present invention.
  • a micro-channel heat exchanger 2 according to a first embodiment of the present invention comprises micro-channels or flat tubes 5 , fins 4 disposed between the adjacent micro-channels or flat tubes 5 , an inlet manifold 3 and an outlet manifold (not shown) disposed at ends of the micro-channels or flat tubes 5 respectively, and a refrigerant distributor 1 disposed in the inlet manifold 3 as shown in FIGS. 3-4 .
  • the refrigerant distributor 1 is disposed at a side of the heat exchanger 2 to distribute refrigerant.
  • the refrigerant distributor 1 for the heat exchanger 2 comprises: a pipe 9 having an inlet 7 disposed generally at one end of the pipe. In use, refrigerant flows into the pipe through the inlet. A cross-section of a flow passage within the pipe 9 gradually decreases from one end of the pipe to the other end.
  • the pipe 9 comprises a plurality of segments 91 , and a cross-section area of one of the plurality of segments 91 is less than that of the preceding one of the plurality of segments 91 from one end of the pipe to the other end.
  • the distributor 1 or pipe 9 may comprise a plurality of cylindrical pipes 91 having different diameters and connected with each other by welding.
  • the respective diameters of the plurality of cylindrical pipes 91 gradually decrease in a refrigerant flow direction R in which the refrigerant flows through the pipe 9 .
  • the pipe 9 shown in FIG. 4 does not contain the portion extending out of the heat exchanger as shown in FIG. 3 .
  • the flow rate of the refrigerant gradually decreases in the refrigerant flow direction R, but a cross-sectional area of the pipe also reduces in the refrigerant flow direction R.
  • a heat exchanger according to a second embodiment of the present invention is the same as that of the first embodiment except in the design of the distributor 1 . Only the distributor 1 is described below in detail.
  • the distributor 1 comprises a pipe 9 .
  • the pipe 9 is configured in such a manner that a cylindrical pipe is divided into a plurality of segments 91 and is at least partially pressed so that a cross-section of one of the plurality of segments 91 is narrower than that of the preceding one of the plurality of segments from the one end to the other end of the pipe.
  • the cylindrical pipe is pressed to be more flat gradually in the refrigerant flow direction R.
  • the cross-sections of the pipe have the same perimeter, but the cross-section area of the pipe gradually reduces in the refrigerant flow direction R as shown in FIG. 5 .
  • the flow rate of the refrigerant gradually decreases in the refrigerant flow direction R, but the cross-section area of the pipe also reduces in the refrigerant flow direction R.
  • a micro-channel heat exchanger 2 according to a third embodiment of the present application comprises micro-channels or flat tubes 5 , fins 4 disposed between the adjacent micro-channels or flat tubes 5 , an inlet manifold 3 and an outlet manifold (not shown) disposed at ends of the micro-channels or flat tubes 5 respectively, and a refrigerant distributor 1 disposed in the inlet manifold 3 as shown in FIGS. 6 and 8 .
  • the refrigerant distributor 1 is disposed at a side of the heat exchanger 2 to distribute refrigerant.
  • the distributor 1 comprises a plurality of distributing pipes 9 (three pipes 9 are shown in FIGS. 6-8 ) having the same diameter and inserted into the inlet manifold 3 as shown in FIGS. 6-8 .
  • the plurality of distributing pipes 9 have different lengths.
  • the first one of the plurality of distributing pipes 9 is shortest and is used for distributing the refrigerant in a range from the inlet 7 to an end 11 of the first pipe away from the inlet 7 .
  • the lengths of the remaining pipes 9 are increased successively from the second one to the last one, and each of the remaining pipes is used for distributing the refrigerant in a range from an end 11 of the preceding pipe 9 away from the inlet 7 to its end 11 away from the inlet 7 , as shown in FIG. 7 .
  • Each of the plurality of distributing pipes 9 is responsible for distributing refrigerant to the same number of the micro-channels or flat tubes 5 .
  • reference numerals 8 ′ indicate refrigerant flows distributed by the plurality of pipes 9 .
  • the pipes 9 shown in FIG. 7 do not contain the portions extending out of the heat exchanger 2 as shown in FIG. 6 .
  • each distributor pipe is responsible for distributing refrigerant to fewer flat tubes, a number of the distributing outlets is decreased. Therefore, the flow speed of the refrigerant within the distributor is relative uniform.
  • each of the plurality of distributing pipes 9 may be used to distribute refrigerant to different numbers of flat tubes 5 according to the different conditions as required, respectively.
  • the flow rate of refrigerant can be distributed by adjusting the cross-section area of each of the pipes 9 and/or size and number of the outlets in each of the distributing pipes 9 , or different combinations thereof.
  • the heat exchanger having the distributor is used for domestic, commercial and other applications, only the combination of the distributing pipes is adjusted to improve the distribution of refrigerant conveniently.
  • the distributing pipe 9 may comprise any other number of pipes such as two, four, and five pipes.
  • the plurality of pipes 9 can be arranged horizontally (as shown in FIG. 8 ), vertically (as shown in FIG. 6 ) or at any appropriate angle or diagonally.
  • a cone-shape pipe can be used for the distributor.
  • the distributing pipe 9 and the inlet manifold 3 are made of a cylindrical pipe, but they can be made of pipe having any appropriate cross-section shape such as a pipe having elliptical cross-section.
  • a micro-channel heat exchanger is described and shown in a state where the micro-channel heat exchanger stands vertically only for the purpose of convenient description and illustration.
  • the present invention is not limited to the examples shown in the figures.
  • the outlet manifold located on the above side of the micro-channel exchanger is omitted in the figures.
  • the distributing pipe 9 and the inlet manifold may be disposed on the above side of the micro-channel exchanger shown in the drawings.
  • micro-channel heat exchanger designs according to the embodiments of the present application can be used as an evaporator and the like.
  • the distributing pipe 9 is inserted from one end of the inlet manifold, but with regard to the distributing pipe 9 shown in FIGS. 4-5 , two distributing pipes 9 may be employed and inserted into the inlet manifold from both ends of the inlet manifold respectively, and as for the distributor shown in FIG. 7 , two distributors may be employed and inserted into the inlet manifold from both ends of the inlet manifold, respectively.

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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)
  • Details Of Heat-Exchange And Heat-Transfer (AREA)
US12/732,027 2009-03-25 2010-03-25 Refrigerant distributor for heat exchanger and heat exchanger Abandoned US20100242535A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN200910127918.1A CN101788242A (zh) 2009-03-25 2009-03-25 用于热交换器的制冷剂分配器和热交换器
CN200910127918.1 2009-03-25

Publications (1)

Publication Number Publication Date
US20100242535A1 true US20100242535A1 (en) 2010-09-30

Family

ID=42263798

Family Applications (1)

Application Number Title Priority Date Filing Date
US12/732,027 Abandoned US20100242535A1 (en) 2009-03-25 2010-03-25 Refrigerant distributor for heat exchanger and heat exchanger

Country Status (3)

Country Link
US (1) US20100242535A1 (de)
EP (1) EP2236973B1 (de)
CN (1) CN101788242A (de)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160298887A1 (en) * 2013-08-12 2016-10-13 Carrier Corporation Heat exchanger and flow distributor
US10184703B2 (en) 2014-08-19 2019-01-22 Carrier Corporation Multipass microchannel heat exchanger
US20210140713A1 (en) * 2019-11-07 2021-05-13 Carrier Corporation Microchannel heat exchanger having auxiliary headers and core
US11221163B2 (en) * 2019-08-02 2022-01-11 Randy Lefor Evaporator having integrated pulse wave atomizer expansion device
CN114812016A (zh) * 2022-05-20 2022-07-29 西安交通大学 一种微通道蒸发器及其工作方法
US11408688B2 (en) * 2020-06-17 2022-08-09 Mahle International Gmbh Heat exchanger
CN115993020A (zh) * 2022-12-07 2023-04-21 西安交通大学 一种与流量适配的微通道蒸发器及其控制方法
US11713931B2 (en) * 2019-05-02 2023-08-01 Carrier Corporation Multichannel evaporator distributor
US20240093952A1 (en) * 2022-09-15 2024-03-21 Hamilton Sundstrand Corporation Crossflow heat exchanger with stacked distribution tubes
EP4400795A1 (de) * 2022-12-23 2024-07-17 Carrier Corporation Einfacher verteiler für ansaugkrümmer eines mikrokanalwärmetauschers

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103759572A (zh) * 2013-12-10 2014-04-30 柳州五菱宝马利汽车空调有限公司 车用平行流蒸发器的插管式集分流管
CN103644688B (zh) * 2013-12-24 2016-04-13 杭州三花微通道换热器有限公司 对流式制冷剂分配装置和具有它的换热器
US11162735B2 (en) 2013-12-24 2021-11-02 Carrier Corporation Distributor for falling film evaporator
CN106322865A (zh) * 2016-10-31 2017-01-11 珠海格力电器股份有限公司 空调机组及其分液器
FR3059407B1 (fr) * 2016-11-30 2019-10-18 Valeo Systemes Thermiques Dispositif de mixage d'un fluide refrigerant a l'interieur d'une boite collectrice d'un echangeur thermique
FR3059408A1 (fr) * 2016-11-30 2018-06-01 Valeo Systemes Thermiques Dispositif de distribution d'un fluide refrigerant a l'interieur d'une boite collectrice d'un echangeur thermique
CN110230901A (zh) * 2019-05-27 2019-09-13 广州大学 一种气液两相共用型的冷媒分配管及热泵系统
CN115773599B (zh) * 2022-11-30 2025-10-10 西安交通大学 一种分液器及其应用

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US2181927A (en) * 1936-04-03 1939-12-05 Albert J Townsend Heat exchanger and method of making same
US3232341A (en) * 1960-02-01 1966-02-01 Garrett Corp Condenser
US3254707A (en) * 1964-03-19 1966-06-07 Hunt Foods And Ind Inc Heat exchanger and cooling apparatus
US3976128A (en) * 1975-06-12 1976-08-24 Ford Motor Company Plate and fin heat exchanger
US4697635A (en) * 1984-07-05 1987-10-06 Apd Cryogenics Inc. Parallel wrapped tube heat exchanger
US5806586A (en) * 1993-07-03 1998-09-15 Ernst Flitsch Gmbh & Co. Plate heat exchanger with a refrigerant distributor
US20070062678A1 (en) * 2005-09-16 2007-03-22 Naoto Hayashi Heat exchanger
US20090173482A1 (en) * 2008-01-09 2009-07-09 Beamer Henry E Distributor tube subassembly
US20100252243A1 (en) * 2009-04-03 2010-10-07 Liu Huazhao Refrigerant distributor for heat exchanger and heat exchanger
US20100282454A1 (en) * 2006-11-13 2010-11-11 Carrier Corporation Minichannel heat exchanger header insert for distribution

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* Cited by examiner, † Cited by third party
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DE3310236A1 (de) * 1983-03-22 1984-09-27 Autokühler-Gesellschaft mbH, 3520 Hofgeismar Kaeltemittel-verteiler fuer den verdampfer einer kaeltemaschine oder einer waermepumpe
JP3210062B2 (ja) * 1992-03-23 2001-09-17 松下冷機株式会社 冷媒分流器
IL107850A0 (en) * 1992-12-07 1994-04-12 Multistack Int Ltd Improvements in plate heat exchangers
DE102005059919A1 (de) * 2005-12-13 2007-06-14 Behr Gmbh & Co. Kg Wärmetauscher, insbesondere Verdampfer

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2181927A (en) * 1936-04-03 1939-12-05 Albert J Townsend Heat exchanger and method of making same
US3232341A (en) * 1960-02-01 1966-02-01 Garrett Corp Condenser
US3254707A (en) * 1964-03-19 1966-06-07 Hunt Foods And Ind Inc Heat exchanger and cooling apparatus
US3976128A (en) * 1975-06-12 1976-08-24 Ford Motor Company Plate and fin heat exchanger
US4697635A (en) * 1984-07-05 1987-10-06 Apd Cryogenics Inc. Parallel wrapped tube heat exchanger
US5806586A (en) * 1993-07-03 1998-09-15 Ernst Flitsch Gmbh & Co. Plate heat exchanger with a refrigerant distributor
US20070062678A1 (en) * 2005-09-16 2007-03-22 Naoto Hayashi Heat exchanger
US20100282454A1 (en) * 2006-11-13 2010-11-11 Carrier Corporation Minichannel heat exchanger header insert for distribution
US20090173482A1 (en) * 2008-01-09 2009-07-09 Beamer Henry E Distributor tube subassembly
US20100252243A1 (en) * 2009-04-03 2010-10-07 Liu Huazhao Refrigerant distributor for heat exchanger and heat exchanger

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9989283B2 (en) * 2013-08-12 2018-06-05 Carrier Corporation Heat exchanger and flow distributor
US20160298887A1 (en) * 2013-08-12 2016-10-13 Carrier Corporation Heat exchanger and flow distributor
US10184703B2 (en) 2014-08-19 2019-01-22 Carrier Corporation Multipass microchannel heat exchanger
US11713931B2 (en) * 2019-05-02 2023-08-01 Carrier Corporation Multichannel evaporator distributor
US11221163B2 (en) * 2019-08-02 2022-01-11 Randy Lefor Evaporator having integrated pulse wave atomizer expansion device
US12038234B2 (en) 2019-11-07 2024-07-16 Carrier Corporation Microchannel heat exchanger having auxiliary headers and core
US11713928B2 (en) * 2019-11-07 2023-08-01 Carrier Corporation Microchannel heat exchanger having auxiliary headers and core
US20210140713A1 (en) * 2019-11-07 2021-05-13 Carrier Corporation Microchannel heat exchanger having auxiliary headers and core
US11408688B2 (en) * 2020-06-17 2022-08-09 Mahle International Gmbh Heat exchanger
US20220333876A1 (en) * 2020-06-17 2022-10-20 Mahle International Gmbh Heat exchanger
US12111123B2 (en) * 2020-06-17 2024-10-08 Mahle International Gmbh Heat exchanger
CN114812016A (zh) * 2022-05-20 2022-07-29 西安交通大学 一种微通道蒸发器及其工作方法
US20240093952A1 (en) * 2022-09-15 2024-03-21 Hamilton Sundstrand Corporation Crossflow heat exchanger with stacked distribution tubes
US12130097B2 (en) * 2022-09-15 2024-10-29 Hamilton Sundstrand Corporation Crossflow heat exchanger with stacked distribution tubes
CN115993020A (zh) * 2022-12-07 2023-04-21 西安交通大学 一种与流量适配的微通道蒸发器及其控制方法
EP4400795A1 (de) * 2022-12-23 2024-07-17 Carrier Corporation Einfacher verteiler für ansaugkrümmer eines mikrokanalwärmetauschers
US12566035B2 (en) 2022-12-23 2026-03-03 Carrier Corporation Simple distributor for inlet manifold of microchannel heat exchanger

Also Published As

Publication number Publication date
EP2236973B1 (de) 2016-05-18
EP2236973A3 (de) 2014-04-23
EP2236973A2 (de) 2010-10-06
CN101788242A (zh) 2010-07-28

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AS Assignment

Owner name: DANFOSS SANHUA (HANGZHOU) MICRO CHANNEL HEAT EXCHA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:JIANLONG, JIANG;XIANGXUN, LU;HUANG, LIN-JIE;REEL/FRAME:024401/0683

Effective date: 20100317

AS Assignment

Owner name: DANFOSS A/S, DENMARK

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:DANFOSS SANHUA (HANGZHOU) MICRO CHANNEL HEAT EXCHANGER CO., LTD;REEL/FRAME:028791/0735

Effective date: 20120612

Owner name: SANHUA HOLDING GROUP CO., LTD., CHINA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:DANFOSS SANHUA (HANGZHOU) MICRO CHANNEL HEAT EXCHANGER CO., LTD;REEL/FRAME:028791/0735

Effective date: 20120612

AS Assignment

Owner name: SANHUA (HANGZHOU) MICRO CHANNEL HEAT EXCHANGER CO.

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SANHUA HOLDING GROUP CO., LTD;REEL/FRAME:034969/0568

Effective date: 20150211

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION