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US20180010857A1 - Heat exchanger and multi-split system having same - Google Patents

Heat exchanger and multi-split system having same Download PDF

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Publication number
US20180010857A1
US20180010857A1 US15/501,957 US201515501957A US2018010857A1 US 20180010857 A1 US20180010857 A1 US 20180010857A1 US 201515501957 A US201515501957 A US 201515501957A US 2018010857 A1 US2018010857 A1 US 2018010857A1
Authority
US
United States
Prior art keywords
main body
heat exchanger
pipe
pipes
liquid refrigerant
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
US15/501,957
Other languages
English (en)
Inventor
Guozhong Yang
Bin Luo
Zhijun TAN
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.)
Midea Group Co Ltd
GD Midea Heating and Ventilating Equipment Co Ltd
Original Assignee
Midea Group Co Ltd
GD Midea Heating and Ventilating Equipment Co Ltd
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 Midea Group Co Ltd, GD Midea Heating and Ventilating Equipment Co Ltd filed Critical Midea Group Co Ltd
Assigned to GD MIDEA HEATING & VENTILATING EQUIPMENT CO., LTD., MIDEA GROUP CO., LTD. reassignment GD MIDEA HEATING & VENTILATING EQUIPMENT CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: LUO, BIN, TAN, Zhijun, YANG, GUOZHONG
Publication of US20180010857A1 publication Critical patent/US20180010857A1/en
Abandoned legal-status Critical Current

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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
    • 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
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/0066—Multi-circuit heat-exchangers, e.g. integrating different heat exchange sections in the same unit or heat-exchangers for more than two fluids
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/30—Arrangement or mounting of heat-exchangers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • 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
    • 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
    • F28F9/0263—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits by varying the geometry or cross-section of header box
    • 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
    • F28F9/0275—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 branch pipes
    • 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
    • F28F2009/0285—Other particular headers or end plates
    • F28F2009/029—Other particular headers or end plates with increasing or decreasing cross-section, e.g. having conical shape

Definitions

  • the present disclosure relates to a field of heat exchanger equipment, especially to a heat exchanger and a multi-split system having the same.
  • a multi-split system in the related art includes an outdoor unit, an indoor unit and a refrigerant flow direction switching device and is divided to a triple-pipe (i.e. three refrigerant pipes are provided) multi-split system and a double-pipe (i.e. two refrigerant pipes are provided) multi-split system according to different amounts of refrigerant pipes between the outdoor unit and the refrigerant flow direction switching device.
  • a triple-pipe i.e. three refrigerant pipes are provided
  • a double-pipe i.e. two refrigerant pipes are provided
  • the heat exchanger in the outdoor unit has to be designed to have a fixed refrigerant flow direction, i.e. the refrigerant flow direction has no business with refrigerating or heating.
  • a capillary in a traditional heat pump machine is usually replaced with a flute-like pipe, which usually results in a bias flow of a two-phase refrigerant when the outdoor unit heats, thus reducing a low heating performance of the system.
  • the present disclosure aims to solve at least one of the technical problems in the related art.
  • the present disclosure provides a heat exchanger which can distribute a two-phase refrigerant without a split-flow capillary better.
  • a multi-split system having the heat exchanger mentioned above is also provided in the present disclosure.
  • the heat exchanger includes: a manifold including a main body, an inlet disposed in a bottom portion of the main body, and a plurality of split-flow ports distributed in a side wall of the main body along a length direction of the main body, in which the main body includes a plurality of pipes along from bottom to top, the pipe located downstream has a smaller flow area than the pipe located upstream in each two adjacent pipes, each pipe has a height no greater than 0.5 m, and a number of the plurality of pipes is 2 ⁇ N ⁇ 3; a header communicated with the manifold via a plurality of heat exchange tubes, in which the plurality of heat exchange tubes are spaced apart from one another along an up and down direction and the header has an outlet for discharging a refrigerant.
  • the heat exchanger according to embodiments of the present disclosure can distribute a two-phase refrigerant without a split-flow capillary better.
  • the main body is configured in such a manner that a flow speed of a liquid refrigerant flowing through a transition portion of each two adjacent pipes is substantially equal to a flow speed of the liquid refrigerant at the inlet.
  • the flow speed of the liquid refrigerant flowing through the transition portion of each two adjacent pipes and the flow speed of the liquid refrigerant at the inlet both a value range of 0.4 ⁇ 0.6 m/s.
  • the header is a straight pipe.
  • the heat exchange tube is a flat tube.
  • the multi-split system is also provided in the present disclosure, which includes the heat exchanger described above.
  • FIG. 1 is a schematic view of a heat exchanger according to an embodiment of the present disclosure
  • FIG. 2 is a schematic view of a heat exchanger according to another embodiment of the present disclosure.
  • first and second are used herein for purposes of description and are not intended to indicate or imply relative importance or significance or to imply the number of indicated technical features.
  • the feature defined with “first” and “second” may comprise one or more of this feature expressly or implicitly.
  • a plurality of means at least two, such as two or three, unless specified otherwise.
  • the terms “mounted,” “connected,” “communicated”, “fixed” are used broadly, and may be, for example, fixed connections, detachable connections, or integral connections; may also be mechanical or electrical connections or be communicated with each other; may also be direct connections or indirect connections via intermediations; may also be inner communications of two elements or interact relationships of two elements, which can be understood by those skilled in the art according to specific situations, unless specified or limited otherwise.
  • a heat exchanger 100 according to embodiments of the present disclosure will be described with reference to FIG. 1 to FIG. 2 , in which the heat exchanger 100 may be applied to refrigerating devices such as a single refrigerating machine, a refrigerating and heating machine or a multi-split system.
  • refrigerating devices such as a single refrigerating machine, a refrigerating and heating machine or a multi-split system.
  • the heat exchanger 100 includes a manifold 1 , a heat exchange tube (not shown in the drawings) and a header 2 .
  • the manifold 1 includes a main body 11 , an inlet 12 and a plurality of split-flow ports (not shown in the drawings).
  • the inlet 12 is disposed in a bottom portion of the main body 11 and the plurality of split-flow ports is distributed in a side wall of the main body 11 along a length direction of the main body 11 .
  • the header 2 is communicated with the manifold 1 via a plurality of heat exchange tubes, in which the plurality of heat exchange tubes are spaced apart from one another along an up and down direction, and the header 2 has an outlet 21 for discharging a refrigerant.
  • the refrigerant from the manifold 1 enters the heat exchange tubes through the plurality of split-flow ports and releases or absorbs heat in the heat exchange tubes, and lastly the refrigerant after the heat release or absorption enters the header 2 and further enters other flow paths via the outlet 21 .
  • the refrigerant flows by every split-flow port from bottom to top from the inlet 12 in the bottom portion of the main body 11 , and the refrigerant passing through each split-flow port enters the header 2 via the heat exchange tubes.
  • the main body 11 includes a plurality of pipes, the pipe located downstream has a smaller flow area than the pipe located upstream in each two adjacent pipes, and a number of the plurality of pipes is 2 ⁇ N ⁇ 3. That is, the number of the pipes is two or three.
  • the main body 11 includes a first pipe 111 and a second pipe 112 , the inlet 12 is provided in the first pipe 111 , and the second pipe 112 has a smaller cross-sectional area than the first pipe 111 .
  • the second pipe 112 has a smaller flow area than the first pipe 111 .
  • the liquid refrigerant in the first pipe 111 becomes less and less while flowing upwards and a speed of the refrigerant trends to decrease, and then the refrigerant enters the second pipe 112 . Since the second pipe 112 has the smaller flow area than the first pipe 111 , the refrigerant can be accelerated to some extent, such that the speed of the refrigerant in the second pipe 112 will not be decreased significantly and also enough refrigerant in the second pipe 112 can flow into the heat exchange tubes through the split-flow ports, thus improving a working efficiency of the heat exchanger 100 effectively.
  • the main body 11 may also include a first pipe 111 , a second pipe 112 and a third pipe 113 , the inlet 12 is provided in the first pipe 111 , the second pipe 112 has a smaller flow area than the first pipe 111 , and the third pipe 113 has a smaller flow area than the second pipe 112 .
  • the refrigerant can flow through the split-flow ports in a top portion of the main body 11 so as to improve a use ratio of the heat exchange tubes corresponding to the third pipe 113 effectively, thus further improving the working efficiency of the heat exchanger 100 effectively.
  • Each pipe has a height no greater than 0.5 m, which ensures that the refrigerant can flow to the top portion of the main body 11 , thus improving a working efficiency of an upper region of the heat exchanger 100 effectively.
  • the main body 11 includes a plurality of pipes and the pipe located downstream has the smaller flow area than the pipe located upstream in each two adjacent pipes, such that the flow speed of the liquid refrigerant can be increased when the refrigerant flows through the transition portion of each two adjacent pipes, which has a function of speeding up the refrigerant on its way and ensures that enough liquid refrigerant can be provided to the upper region of the manifold 1 so as to allow the heat exchanger 100 to be used efficiently, so the heat exchanger 100 can distribute the two-phase refrigerant without a split-flow capillary better.
  • the main body 11 is configured in such a manner that a flow speed of the liquid refrigerant flowing through the transition portion of each two adjacent pipes is substantially equal to a flow speed of the liquid refrigerant at the inlet 12 . That is, a difference between the flow areas of each two adjacent pipes is designed to improve the flow speed of the liquid refrigerant flowing through the transition portion to be substantially equal to the flow speed of the liquid refrigerant at the inlet, so as to further ensure the function of accelerating the liquid refrigerant on its way, such that the speed of the liquid refrigerant flowing from the pipe upstream to the pipe downstream will not be decreased significantly and the liquid refrigerant can enter the heat exchange tubes in an upper region of the heat exchanger 100 , thus further improving the working efficiency of the heat exchanger 100 effectively.
  • the flow speed of the liquid refrigerant flowing through the transition portion of each two adjacent pipes and the flow speed of the liquid refrigerant at the inlet 12 both have a value range of 0.4 ⁇ 0.6 m/s.
  • the flow speed of the liquid refrigerant is controlled in a certain range, which allows the liquid refrigerant to substantially uniformly enter the heat exchange tubes through the split-flow ports effectively, thus improving the working efficiency of the whole heat exchanger 100 .
  • the header 2 is a straight pipe.
  • the refrigerant flowing out from the heat exchange tubes enters the header 2 and flows from top to bottom in the header 2 , and it is advantageous for a circulation of the refrigerant by configuring the header 2 as the straight pipe, thus improving the working efficiency of the heat exchanger 100 .
  • the heat exchange tube is a flat tube, which can increase a heat exchange area of the refrigerant and the air, so that the refrigerant can absorb heat or release heat better, thus further improving the working efficiency of the heat exchanger 100 effectively.
  • a fin may be disposed between each two adjacent heat exchange tubes in the up and down direction, so as to increase a heat exchange area of the whole heat exchanger 100 and the air, thus further improving a heat exchange effect of the heat exchanger 100 .
  • the present disclosure further provides a multi-split system, which includes the heat exchanger 100 described above.
  • a structure in which a first feature is “on” or “below” a second feature may include an embodiment in which the first feature is in direct contact with the second feature, and may also include an embodiment in which the first feature and the second feature are not in direct contact with each other, but are contacted via an additional feature formed therebetween.
  • a first feature “on,” “above,” or “on top of” a second feature may include an embodiment in which the first feature is right or obliquely “on,” “above,” or “on top of” the second feature, or just means that the first feature is at a height higher than that of the second feature; while a first feature “below,” “under,” or “on bottom of” a second feature may include an embodiment in which the first feature is right or obliquely “below,” “under,” or “on bottom of” the second feature, or just means that the first feature is at a height lower than that of the second feature.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Thermal Sciences (AREA)
  • Geometry (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
US15/501,957 2015-03-31 2015-12-21 Heat exchanger and multi-split system having same Abandoned US20180010857A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CN201510149788.7 2015-03-31
CN201510149788.7A CN104764256A (zh) 2015-03-31 2015-03-31 热换器及具有其的多联机系统
PCT/CN2015/098131 WO2016155367A1 (fr) 2015-03-31 2015-12-21 Échangeur de chaleur et système à multiples divisions comportant celui-ci

Publications (1)

Publication Number Publication Date
US20180010857A1 true US20180010857A1 (en) 2018-01-11

Family

ID=53646247

Family Applications (1)

Application Number Title Priority Date Filing Date
US15/501,957 Abandoned US20180010857A1 (en) 2015-03-31 2015-12-21 Heat exchanger and multi-split system having same

Country Status (5)

Country Link
US (1) US20180010857A1 (fr)
EP (1) EP3279599A4 (fr)
CN (1) CN104764256A (fr)
BR (1) BR112017002057A2 (fr)
WO (1) WO2016155367A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11408688B2 (en) * 2020-06-17 2022-08-09 Mahle International Gmbh Heat exchanger
US20240093952A1 (en) * 2022-09-15 2024-03-21 Hamilton Sundstrand Corporation Crossflow heat exchanger with stacked distribution tubes
US12392505B2 (en) 2021-07-26 2025-08-19 Qingdao Hisense Hitachi Air-conditioning Systems Co., Ltd. Air conditioner

Families Citing this family (7)

* Cited by examiner, † Cited by third party
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CN104764256A (zh) * 2015-03-31 2015-07-08 广东美的暖通设备有限公司 热换器及具有其的多联机系统
CN106813425B (zh) * 2015-11-30 2019-10-01 青岛海尔空调器有限总公司 用于辐射制冷的组合式微通道换热器
CN107289678A (zh) * 2016-04-13 2017-10-24 珠海格力电器股份有限公司 微通道换热器及热泵热水器
CN106440861B (zh) * 2016-08-30 2018-07-13 杭州三花微通道换热器有限公司 换热器组件和具有其的制冷系统
CN110793243A (zh) * 2019-11-29 2020-02-14 宁波奥克斯电气股份有限公司 空调器用笛子管装置、空调器及出风调节的控制方法
CN114688722A (zh) * 2020-12-28 2022-07-01 宁波方太厨具有限公司 一种换热器及应用有该换热器的厨房空气调节系统
CN113587250A (zh) * 2021-07-26 2021-11-02 青岛海信日立空调系统有限公司 空调器

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Publication number Priority date Publication date Assignee Title
US3919858A (en) * 1973-04-19 1975-11-18 Frick Co Direct liquid refrigerant supply and return system
JPH03260567A (ja) * 1990-03-08 1991-11-20 Mitsubishi Electric Corp 気液二相流体の分配器
US20020134535A1 (en) * 2001-03-23 2002-09-26 Takahiro Nozaki Heat exchanger
US20130299152A1 (en) * 2011-01-21 2013-11-14 Daikin Industries, Ltd. Heat exchanger and air conditioner

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11408688B2 (en) * 2020-06-17 2022-08-09 Mahle International Gmbh Heat exchanger
US12111123B2 (en) 2020-06-17 2024-10-08 Mahle International Gmbh Heat exchanger
US12392505B2 (en) 2021-07-26 2025-08-19 Qingdao Hisense Hitachi Air-conditioning Systems Co., Ltd. Air conditioner
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

Also Published As

Publication number Publication date
BR112017002057A2 (pt) 2018-01-30
EP3279599A4 (fr) 2018-11-07
EP3279599A1 (fr) 2018-02-07
WO2016155367A1 (fr) 2016-10-06
CN104764256A (zh) 2015-07-08

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