EP2236973B1 - Distributeur réfrigérant pour échangeur thermique et échangeur thermique - Google Patents

Distributeur réfrigérant pour échangeur thermique et échangeur thermique Download PDF

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Publication number
EP2236973B1
EP2236973B1 EP10003133.5A EP10003133A EP2236973B1 EP 2236973 B1 EP2236973 B1 EP 2236973B1 EP 10003133 A EP10003133 A EP 10003133A EP 2236973 B1 EP2236973 B1 EP 2236973B1
Authority
EP
European Patent Office
Prior art keywords
refrigerant
pipe
heat exchanger
distributor
cross
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.)
Active
Application number
EP10003133.5A
Other languages
German (de)
English (en)
Other versions
EP2236973A3 (fr
EP2236973A2 (fr
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
Sanhua Hangzhou Micro Channel Heat Exchanger Co Ltd
Danfoss AS
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.)
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Publication date
Application filed by Sanhua Hangzhou Micro Channel Heat Exchanger Co Ltd, Danfoss AS filed Critical Sanhua Hangzhou Micro Channel Heat Exchanger Co Ltd
Publication of EP2236973A2 publication Critical patent/EP2236973A2/fr
Publication of EP2236973A3 publication Critical patent/EP2236973A3/fr
Application granted granted Critical
Publication of EP2236973B1 publication Critical patent/EP2236973B1/fr
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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.
  • refrigerant is two-phase refrigerant containing gas and liquid, if an inappropriate refrigerant distributor is employed, the refrigerant can not be uniformly distributed to the micro-channels or flat tubes 5.
  • 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 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 plate heat exchanger comprising a plurality of plates with plate holes that communicate with refrigerant passages.
  • the plate heat exchanger comprises a tapered tube with holes which extends through the plate holes to introduce the refrigerant.
  • the tapered tube has a cross-sectional area that decreases from a refrigerant manifold end to the opposite end of the tube.
  • EP 1 798 506 A2 shows a heat exchanger with an injecting pipe that comprises several openings.
  • the free flow cross-section of the injecting pipe decreases in the flow direction.
  • a refrigerant distributor for an evaporator comprises several adjacently arranged inlet openings for a refrigerant consisting of a distributor head attached to the evaporator and which has a longitudinal bore and several cross-bores extending from the longitudinal bore.
  • the longitudinal bore is conical and has a decreasing cross-section in the flow direction.
  • JP H05 264126 A discloses a tube for providing a refrigerant to a heat exchanger.
  • the tube connects a plurality of orifices in a longitudinal direction, leading to the micro-channels of the heat exchanger.
  • the inner free cross-sectional area of the tube is reduced in the direction away from the inlet pipe by either introducing an insert or by reducing the perimeter of the cross-sectional area by pressing and braising a side of the pipe.
  • 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, and wherein the pipe is configured in such a manner that a cylindrical pipe is divided into a plurality of segments and is at least partially pressed so that a cross-section of one of the plurality of segments is narrower than that of the preceding one of the plurality of segments from the one end to the other end of the pipe, and wherein 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, and wherein the cylindrical pipe is pressed to be more flat gradually in the refrigerant flow direction.
  • a heat exchanger comprising a refrigerant distributor disposed at a side of the heat exchanger to distribute refrigerant, wherein the refrigerant distributor is one of the distributors mentioned above.
  • a micro-channel heat exchanger 2 according to the first 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 Fig. 3 .
  • the refrigerant distributor 1 is disposed at a side of the heat exchanger 2 to distribute refrigerant.
  • the refrigerant distributor 1 for the heat exchanter1 comprises: a pipe 9 having an inlet 7 disposed generally at one end of the pipe. Refrigerant flows into the pipe through the inlet in use. A cross-section of a flow passage within the pipe 9 gradually decreases from the one end to the other end of the pipe.
  • 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 the one end to the other end of the pipe.
  • the flow rate of the refrigerant gradually decreases in the refrigerant flow direction R, but a cross-section area of the pipe also reduces in the refrigerant flow direction R.
  • a heat exchanger according to the second embodiment of the present invention is the same as that of the first embodiment except a 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 the 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.
  • a plurality of distributing pipes 9 are inserted into the inlet manifold as shown in Fig. 8 , but 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.
  • 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.
  • the micro-channel heat exchanger is described and shown in a state that 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 is described in order to explain the present invention, the principle and concept of the present invention can be applied to any other appropriate heat exchangers.
  • micro-channel heat exchanger or the heat exchanger 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 Fig. 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)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Details Of Heat-Exchange And Heat-Transfer (AREA)

Claims (3)

  1. Distributeur de réfrigérant pour un échangeur de chaleur, comprenant : un tuyau ayant une entrée disposée généralement à une extrémité du tuyau, du réfrigérant s'écoulant dans le tuyau à travers l'entrée, une section transversale d'un passage d'écoulement à l'intérieur du tuyau diminuant progressivement depuis ladite extrémité jusqu'à l'autre extrémité du tuyau, le tuyau étant configuré de manière à ce qu'un tuyau cylindrique soit divisé en une pluralité de segments et caractérisé en ce que le tuyau est au moins en partie pressé de telle sorte qu'une section transversale de l'un de la pluralité de segments soit plus étroite que celle du segment précédent de la pluralité de segments depuis ladite extrémité jusqu'à l'autre extrémité du tuyau, et les sections transversales du tuyau ayant le même périmètre mais la surface en section transversale du tuyau diminuant progressivement dans la direction d'écoulement de réfrigérant, et le tuyau cylindrique étant pressé de manière à être de plus en plus plat dans la direction d'écoulement de réfrigérant.
  2. Échangeur de chaleur comprenant : un distributeur de réfrigérant disposé au niveau d'un côté de l'échangeur de chaleur pour distribuer du réfrigérant, le distributeur de réfrigérant étant le distributeur selon la revendication 1.
  3. Échangeur de chaleur selon la revendication 2, dans lequel l'échangeur de chaleur est un échangeur de chaleur à microcanaux.
EP10003133.5A 2009-03-25 2010-03-24 Distributeur réfrigérant pour échangeur thermique et échangeur thermique Active EP2236973B1 (fr)

Applications Claiming Priority (1)

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

Publications (3)

Publication Number Publication Date
EP2236973A2 EP2236973A2 (fr) 2010-10-06
EP2236973A3 EP2236973A3 (fr) 2014-04-23
EP2236973B1 true EP2236973B1 (fr) 2016-05-18

Family

ID=42263798

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10003133.5A Active EP2236973B1 (fr) 2009-03-25 2010-03-24 Distributeur réfrigérant pour échangeur thermique et échangeur thermique

Country Status (3)

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

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3033579B1 (fr) * 2013-08-12 2017-08-02 Carrier Corporation Échangeur de chaleur et répartiteur de débit
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
US10184703B2 (en) 2014-08-19 2019-01-22 Carrier Corporation Multipass microchannel heat exchanger
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
US11713931B2 (en) 2019-05-02 2023-08-01 Carrier Corporation Multichannel evaporator distributor
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
US11221163B2 (en) * 2019-08-02 2022-01-11 Randy Lefor Evaporator having integrated pulse wave atomizer expansion device
US11713928B2 (en) * 2019-11-07 2023-08-01 Carrier Corporation Microchannel heat exchanger having auxiliary headers and core
US11408688B2 (en) * 2020-06-17 2022-08-09 Mahle International Gmbh Heat exchanger
CN114812016B (zh) * 2022-05-20 2023-02-07 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

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Also Published As

Publication number Publication date
US20100242535A1 (en) 2010-09-30
CN101788242A (zh) 2010-07-28
EP2236973A3 (fr) 2014-04-23
EP2236973A2 (fr) 2010-10-06

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