WO2021129440A1 - 换热器及制冷系统 - Google Patents

换热器及制冷系统 Download PDF

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Publication number
WO2021129440A1
WO2021129440A1 PCT/CN2020/136137 CN2020136137W WO2021129440A1 WO 2021129440 A1 WO2021129440 A1 WO 2021129440A1 CN 2020136137 W CN2020136137 W CN 2020136137W WO 2021129440 A1 WO2021129440 A1 WO 2021129440A1
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WO
WIPO (PCT)
Prior art keywords
section
tube
unit
heat exchanger
heat exchange
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PCT/CN2020/136137
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English (en)
French (fr)
Inventor
魏文建
兰兆忠
马文勇
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浙江盾安人工环境股份有限公司
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Application filed by 浙江盾安人工环境股份有限公司 filed Critical 浙江盾安人工环境股份有限公司
Priority to JP2022532028A priority Critical patent/JP2023507904A/ja
Priority to EP20906651.3A priority patent/EP4067805A4/en
Priority to KR1020227021478A priority patent/KR20220098388A/ko
Publication of WO2021129440A1 publication Critical patent/WO2021129440A1/zh

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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
    • 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
    • F28F9/0219—Arrangements for sealing end plates into casing or header box; Header box sub-elements
    • F28F9/0221—Header boxes or end plates formed by stacked elements
    • 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
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
    • F28D1/053—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight
    • F28D1/0535—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight the conduits having a non-circular cross-section
    • F28D1/05366—Assemblies of conduits connected to common headers, e.g. core type radiators
    • 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
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
    • F28F1/24—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely
    • F28F1/30—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely the means being attachable to the element
    • 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
    • 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

Definitions

  • This application relates to the field of refrigeration technology, in particular to heat exchangers and refrigeration systems.
  • the heat exchanger plays a role in heat exchange with the outside world.
  • the header includes a multi-section unit tube. Stress concentration exists on the multi-section unit tube. Under the action of variable load, fatigue fracture is prone to occur, which affects the service life of the product.
  • a heat exchanger is provided.
  • a heat exchanger includes a header, the header includes a plurality of unit tube sections, a plurality of the unit tube sections are stacked and connected in sequence, and each section of the unit tube tube includes a first section and a second section, The diameter of the first section is smaller than the diameter of the second section, so that the first section of the unit section tube can be inserted into the second section of the adjacent unit section tube; each section of the unit section tube An arc section is provided between the first section and the second section, and the arc section extends from the bottom of the first section to the top of the second section, so that the first section and the first section Two-stage connection.
  • the above-mentioned header includes a multi-section of unit tube, each of the unit tube is connected to the heat exchange tube, when welding in the brazing furnace, the heat exchange tube and the header will settle, but the exchange The settling of the heat pipe is more serious than that of the header, and the two cannot settle simultaneously.
  • the first section of the unit section tube is plugged into the second section of the adjacent unit section tube, which is for each unit section tube.
  • the settlement provides a margin for expansion and contraction, so that the header and the heat exchange tube settle synchronously, and the welding efficiency is improved.
  • an arc section is provided between the first section and the second section of each section of the unit tube, which can reduce the stress concentration at the connection between the first section and the second section, Improve the service life of the heat exchanger.
  • the length of the first section ranges from 2 mm to 6 mm. In this way, the length of the first section can be made appropriate. It can be understood that if the length of the first section is too long, the flow volume of the header will be reduced, and if the length of the second section is too short, it will not be Provide expansion and contraction margin for the settlement of the header.
  • the gap between the outer wall of the first section of the unit section tube and the inner wall of the second section of the unit section tube adjacent to it is 0.1 mm. In this way, the gap between the outer wall of the first section of the unit section tube and the inner wall of the second section of the adjacent unit section tube is 0.1 mm, so that the first section of the unit section tube can be smoothly Inserting into the second section of the unit section tube adjacent to it can prevent the gap between the two from being too large and leak welding.
  • the first section, the second section, and the arc-shaped section of each section of the unit section tube are integrally formed. In this way, the welding process between the three can be reduced, and at the same time, the leakage of the connection between the three can be avoided.
  • the arcs of each of the arc-shaped segments are equal. In this way, the arcs of the arc-shaped segments of each section of the unit section tube are equal, which is convenient for processing.
  • the first section is formed by a narrowing of one end of the corresponding unit section tube. In this way, the first section is formed by necking, and the process is simple.
  • the heat exchanger further includes a plurality of heat exchange tubes, each section of the unit section tube is provided with a tube groove, and two ends of the plurality of heat exchange tubes are respectively inserted into the corresponding tube grooves Inside, so that the heat exchange tube communicates with the header.
  • both ends of the unit section tube at the top and the unit section tube at the bottom are provided with end caps, and the end cap seals the collecting pipe.
  • the heat exchanger further includes multiple layers of fins, the multiple layers of fins are respectively arranged between the adjacent heat exchange tubes, and the fins are separated from the heat exchange tubes. One end extends to the other end. In this way, the fin is used to accelerate the heat exchange between the heat exchange tube and the outside.
  • a refrigeration system includes a compressor, a throttling element and the above heat exchanger, and the heat exchanger is respectively connected with the compressor and the throttling element.
  • FIG. 1 is an exploded view of the heat exchanger provided by this application.
  • FIG. 2 is a schematic diagram of the structure of the header provided by this application.
  • Figure 3 is a cross-sectional view of the header provided by this application.
  • FIG. 4 is a schematic diagram of the refrigeration system provided by this application.
  • a component when a component is called “installed on” another component, it can be directly on the other component or a central component may also exist. When a component is considered to be “installed on” another component, it can be directly installed on another component or a centered component may exist at the same time. When a component is considered “fixed” to another component, it can be directly fixed to the other component or there may be a centered component at the same time.
  • a refrigeration system provided by the present application, which is applied to cold chain systems such as household air conditioners, refrigerators, commercial air conditioners or freezers, cold storages, or other occasions that can reduce or increase the temperature of the natural environment.
  • the refrigeration system 1000 includes a compressor 200, a throttling element 300, and a heat exchanger 100.
  • the compressor 200, the throttling element 300, and the heat exchanger 100 are connected to each other through pipelines.
  • the compressor 200, the throttling element 300, and A liquid reservoir, a gas-liquid separator and other accessories can also be arranged between the heat exchangers 100.
  • the heat exchanger 100 includes a header 10 and a plurality of heat exchange tubes 20, the header 10 is arranged at both ends of the heat exchange tube 20, the plurality of heat exchange tubes 20 are arranged parallel to each other,
  • the flow tube 10 is provided with a plurality of tube grooves 11, and the plurality of heat exchange tubes 20 are respectively inserted into the corresponding tube grooves 11, so that the heat exchange tubes 20 and the header 10 are connected, and the number of heat exchange tubes 20 is the same as that of the tube grooves 11. The number corresponds to one by one.
  • the heat exchanger 100 further includes multiple layers of fins 30, and the multiple layers of fins 30 are arranged between adjacent heat exchange tubes 20, that is, a layer of fins are provided between two adjacent heat exchange tubes 20.
  • the fin 30 and the fin 30 extend from one end of the heat exchange tube 20 to the other end, and are used to enhance the heat exchange between the medium in the heat exchange tube 20 and the external environment.
  • the heat exchanger 100 further includes side plates 40.
  • the side plates 40 are respectively located on both sides of the top and bottom fins 30, and are fixed to the top and bottom fins 30 to protect the top and bottom fins respectively. 30.
  • the collecting pipes 10 are located on both sides of the heat exchange pipes 20, that is, there are two collecting pipes 10, and one end of each collecting pipe 10 is provided with a connecting pipe 12, one of the connecting pipes 12 is an inlet, and the other connecting pipe 12 As the outlet, the medium enters from the connecting pipe 12 at the inlet and flows out from the connecting pipe 12 at the outlet.
  • the heat exchanger 100 is used as a condenser, the medium in the heat exchange tube 20 releases heat to the outside environment with the aid of the fins 30, and the connecting tube 12 serving as the inlet is connected to the outlet of the compressor 200 as the medium outlet
  • the connecting pipe 12 is connected to the inlet of the throttling element 300.
  • an oil separator and other accessories can also be set between the inlet connecting pipe 12 and the compressor 200, and the outlet connecting pipe 12 can also be connected to the throttling element 300.
  • Set up other accessories such as a liquid reservoir; when the heat exchanger 100 is used as an evaporator, the medium in the heat exchange tube 20 absorbs heat to the outside environment with the aid of the fin 30, and serves as the inlet connecting tube 12 and the throttle
  • the connecting pipe 12 serving as the outlet is connected to the inlet of the compressor 200.
  • other fittings such as ball valves can be provided between the inlet connecting pipe 12 and the throttle element 300, and the outlet connecting pipe 12 is connected to the compressor 200.
  • Other accessories such as a gas-liquid separator can also be set between.
  • the header 10 includes a multi-section unit tube 13, and along the axial direction of the header 10, the multi-section unit tube 13 is stacked and connected in sequence.
  • the unit section tube 13 includes a first section 131 and a second section 132.
  • the diameter of the first section 131 is smaller than the diameter of the second section 132, so that the unit section tube 13 of this section can be inserted into the adjacent unit section.
  • the surfaces of the header 10 and the heat exchange tube 20 are coated with a composite layer.
  • the composite layer is a brazing material.
  • the heat exchanger 100 is placed in the brazing material.
  • the high temperature environment causes the brazing material to melt, which causes the heat exchange tube 20 and the header 10 to settle, and the heat exchange tube 20 has a more significant settlement than the header 10, and the two heat exchange tubes 20
  • the end is inserted into the tube groove 11 of the header 10, and the two ends are restricted by the notches of the tube groove 11, so that the settlement in the middle of the heat exchange tube 20 is more serious than that at the two ends.
  • the heat exchange tube 20 is deformed as a whole, and the heat exchange tube 20 and the tube
  • the groove 11 is also inclined to fit, and it is prone to false welding and de-soldering during welding.
  • the first section 131 of the unit section tube 13 is inserted into the second section 132 of the adjacent unit section tube 13 to provide a margin for expansion and contraction for the settlement of each section of the unit section tube 13, so that the header 10 and the heat exchange tube 20 are synchronized Settling, improve welding efficiency.
  • an arc-shaped section 133 is provided between the first section 131 and the second section 132 of each section of the unit tube 13, and the arc-shaped section 133 extends from the bottom of the first section 131 to the top of the second section 132 to avoid the first section 132.
  • One section 131 is directly connected with the second section 132 and there is stress concentration. Since the medium in the header 10 is a variable load, that is, the impact force of the medium in the header 10 on the inner wall of the header 10 is not constant, and it is used under long-term impact of the medium or in a vibrating environment. The direct connection between one section 131 and the second section 132 will cause the connection between the first section 131 and the second section 132 to be broken due to stress concentration.
  • the arc-shaped section 133 can reduce the stress concentration between the two and increase the service life of the product.
  • the length of the first section 131 ranges from 2mm-6mm. It is understandable that if the length of the first section 131 is too long, the flow rate of the header 10 will be reduced. If the length of the second section 132 is too short, it will not be able to provide expansion and contraction allowance for the settlement of the header 10, therefore, the length range of the first section 131 is 2mm-6mm as a suitable length range.
  • the length of the first section 131 can be any value between 2mm, 2.5mm, 3mm, 3.8mm, 4mm, 4.5mm, 5mm, 5.3mm, 6mm or 2mm-6mm.
  • the first section 131 is inserted into the second section 132 of the adjacent unit section pipe 13, and the insertion depth is smaller than the length of the first section 131, so as to provide a telescopic allowance for the settlement of each unit section pipe 13.
  • the length of the first section 131 is 4 mm, and the first section 131 is inserted into the second section 132 of the adjacent unit section tube 13 by 2 mm.
  • the length of the first section 131 may be other, and the depth of the second section 132 inserted into the second section 132 of the adjacent unit section tube 13 may also be other values.
  • the gap between the outer wall of the first section 131 of the unit section tube 13 and the inner wall of the second section 132 of the unit section tube 13 adjacent thereto is 0.1 mm. It can be understood that there is a slight gap between the outer wall of the first section 131 of the unit section tube 13 and the inner wall of the second section 132 of the unit section tube 13 adjacent to it.
  • the first section 131 can be smoothly inserted into the second section 132 of the unit section tube 13 adjacent to it, and the gap between the two can be prevented from being too large, and the leakage welding can be prevented.
  • first section 131, the second section 132 and the arc section 133 of each section of the unit section tube 13 are integrally formed, which can reduce the welding process steps, prevent the connection between the three from leaking, and increase product reliability. .
  • the first section 131 is formed by a narrowing of one end of the corresponding unit section tube 13. The process is simple and no additional welding is required.
  • the length of each section of the unit tube 13 is equal, the height of each section of the unit tube 13 is equal, the length of the first section 131 of each section of the unit tube 13 is equal, and the first section 131 of each section of the unit tube 13 has the same length.
  • the inner diameters are equal, the outer diameters of the first section 131 of each unit section tube 13 are equal, the lengths of the second section 132 of each unit section tube 13 are equal, and the inner diameter of the second section 132 of each unit section tube 13
  • the outer diameters of the second section 132 of each section of the unit section tube 13 are all equal, and the arc section 133 of each section of the unit section tube 13 has the same arc, which is convenient for processing.
  • each unit section tube 13 can be designed to be different, and the length, inner diameter, and outer diameter of the first section 131 and the second section 132 of each section unit section tube 13 The diameter can also be designed to be different, and the arc of the arc section 133 of each section of the unit tube 13 can also be designed to be different.
  • Both ends of the unit section pipe 13 at the top and the bottom unit section pipe 13 are provided with end caps 14, that is, both ends of the header 10 are provided with end caps 14, and the end caps 14 seal the header 10 to prevent The medium in the header 10 leaks.
  • the assembly process insert the first section 131 of the unit section tube 13 into the second section 132 of the adjacent unit section tube 13, and coat the surface of each section tube 13 and each heat exchange tube 20 with a composite layer , And then insert a plurality of heat exchange tubes 20 into the tube groove 11 correspondingly, and put them into the brazing furnace for welding.
  • the composite layer melts due to high temperature, and the heat exchange tube 20 and the header 10 settle down, and the header 10 is too much.
  • the first section 131 and the second section 132 of the unit section tube 13 are inserted into each other with a margin for expansion and contraction, which can be settled synchronously with the heat exchange tube 20. After the composite layer is melted, the multi-section unit section tube 13 and the heat exchange tube 20 Welded into a whole.
  • the arc-shaped section 133 between the first section 131 and the second section 132 can reduce the stress concentration at the connection between the two, which can prevent long-term use in a vibrating environment or under the impact of the medium. fracture.

Abstract

一种换热器(100)及制冷系统(1000)，换热器(100)包括集流管(10)，所述集流管(10)包括多节单元节管(13)，多节单元节管(13)依次堆叠连接，每节单元节管(13)包括第一段(131)及第二段(132)，第一段(131)的直径小于第二段(132)的直径，以使单元节管(13)的第一段(131)能够插入相邻的单元节管(13)的第二段(132)内；每节单元节管(13)的第一段(131)与第二段(132)之间设有弧形段(133)，弧形段(133)自第一段(131)的底部延伸至第二段(132)的顶部，以使第一段(131)与第二段(132)连接。

Description

换热器及制冷系统
相关申请
本申请要求2019年12月25日申请的，申请号为201922374776.0，发明名称为“换热器及制冷系统”的中国专利的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及制冷技术领域，特别是涉及换热器及制冷系统。
背景技术
在制冷系统中，换热器作为制冷四大部件中的重要部件，起到与外界进行热交换的作用。
在现有的技术中，集流管包含多节单元节管，多节单元节管上存在应力集中，在变载荷的作用下，容易发生疲劳断裂，影响产品的使用寿命。
发明内容
根据本申请的各种实施例，提供一种换热器。
一种换热器，包括集流管，所述集流管包括多节单元节管，多节所述单元节管依次堆叠连接，每节所述单元节管包括第一段及第二段，所述第一段的直径小于所述第二段的直径，以使所述单元节管的第一段能够插入相邻的所述单元节管的第二段内；每节所述单元节管的第一段与第二段之间设有弧形段，所述弧形段自所述第一段的底部延伸至所述第二段的顶部，以使所述第一段与所述第二段连接。
上述集流管包括多节单元节管，每个所述单元节管分别与所述换热管连接，在钎焊炉里焊接时，所述换热管与集流管会发生沉降，但换热管比所述集流管的沉降严重，两者无法同步沉降，所述单元节管的第一段与相邻所述单元节管的第二段插接，为所述每个单元节管的沉降提供伸缩余量，使得所述集流管与所述换热管同步沉降，提高焊接效率。另外，所述每节所述单元节管的第一段与第二段之间设有弧形段，能够减小所述第一段与所述第二段之间的连接处的应力集中，提高所述换热器的使用寿命。
在其中一个实施例中，沿着所述集流管的轴线方向，所述第一段的长度范围为2mm-6mm。如此，能够使所述第一段的长度合适，可以理解，若所述第一段的长度太长，则会减少集流管的流通量，若所述第二段的长度太短，则无法为所述集流管的沉降提供伸缩余量。
在其中一个实施例中，所述单元节管的第一段的外壁与与之相邻的所述单元节管的第二段的内壁之间的间隙为0.1mm。如此，所述单元节管的第一段的外壁与相邻所述单元节管的第二段的内壁之间的间隙为0.1mm，既能够使所述单元节管的第一段能够顺利地插入与之相邻的所述单元节管的第二段内，又能够防止两者之间的间隙太大，发生漏焊。
在其中一个实施例中，每节所述单元节管的所述第一段、所述第二段及所述弧形段一体成型。如此，能够减少三者之间的焊接工艺，同时避免三者之间的连接发生泄漏。
在其中一个实施例中，每个所述弧形段的弧度均相等。如此，每节所述单元节管的所述弧形段的弧度均相等，方便加工。
在其中一个实施例中，所述第一段由相对应的所述单元节管一端缩口形成。如此，所述第一段通过缩口形成，工艺简单。
在其中一个实施例中，所述换热器还包括多根换热管，每节所述单元节管开设有管槽，多根所述换热管的两端分别插入对应的所述管槽内，以使所述换热管与所述集流管连通。
在其中一个实施例中，位于顶部的所述单元节管及位于底部的所述单元节管的一端均设有端盖，所述端盖密封所述集流管。
在其中一个实施例中，所述换热器还包括多层翅片，多层所述翅片分别设于相邻的所述换热管之间，所述翅片自所述换热管的一端延伸至另一端。如此，所述翅片用于加快所述换热管与外界的换热。
一种制冷系统，包括压缩机、节流元件及上述换热器，所述换热器分别与所述压缩机及所述节流元件连接。
附图说明
构成本申请的一部分的附图用来提供对本申请的进一步理解，本申请的示意性实施例及其说明用于解释本申请，并不构成对本申请的不当限定。
为了更清楚地说明本申请实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本申请提供的换热器的爆炸图。
图2为本申请提供的集流管的结构示意图。
图3为本申请提供的集流管的剖面图。
图4为本申请提供的制冷系统的示意图。
附图中标号的含义为：
1000表示制冷系统；100表示换热器；10表示集流管；11表示管槽；12表示连接管；13表示单元节管；131表示第一段；132表示第二段；133表示弧形段；14表示端盖；20表示换热管；30表示翅片；40表示边板；200表示压缩机；300表示节流元件。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
需要说明的是，当组件被称为“装设于”另一个组件，它可以直接在另一个组件上或者也可以存在居中的组件。当一个组件被认为是“设置于”另一个组件，它可以是直接设置在另一个组件上或者可能同时存在居中组件。当一个组件被认为是“固定于”另一个组件，它可以是直接固定在另一个组件上或者可能同时存在居中组件。
除非另有定义，本文所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同。本文中在本申请的说明书中所使用的术语只是为了描述具体的实施例的目的，不是旨在于限制本申请。本文所使用的术语“或/及”包括一个或多个相关的所列项目的任意的和所有的组合。
请参见图4，本申请提供的一种制冷系统，该制冷系统应用于家用空调、冰箱、商用空调或者冷柜、冷库等冷链系统，或者其他能够降低或者升高自然环境温度的场合。
制冷系统1000包括压缩机200、节流元件300及换热器100，压缩机200、节流元件300及换热器100之间通过管路相互连接，当然，压缩机200、节流元件300及换热器100之间还可设置储液器、气液分离器等其他配件。
请参见图1至图3，换热器100包括集流管10及多根换热管20，集流管10设于换热管20的两端，多根换热管20相互平行设置，集流管10上开设有多个管槽11，多根换热管20分别插入对应的管槽11内，以使换热管20与集流管10连通，换热管20的数量与管槽11的数量一一对应。
具体地，换热器100还包括多层翅片30，多层翅片30设于相邻的换热管20之间，即，相邻的两根换热管20之间均设有一层翅片30，翅片30自换热管20的一端延展至另一端，用于加强换热管20内的介质与外界环境的热交换。
进一步地，换热器100还包括边板40，边板40分别位于顶部及底部的翅片30的两侧，并与顶部及底部的翅片30固定，以分别保护位于顶部及底部的翅片30。
集流管10位于换热管20两侧，即，集流管10为两个，每个集流管10的一端均设有连接管12，其中一个连接管12为进口，另一个连接管12为出口，介质从进口的连接管12进入，从出口的连接管12流出。当换热器100作为冷凝器使用时，换热管20内的介质在翅片30的辅助下向外界环境放热，并且，作为进口的连接管12与压缩机200的出口连接，作为介质出口的连接管12与节流元件300的入口连接，当然，进口的连接管12与压缩机200之间还可设置油分离器等其他配件，出口的连接管12与节流元件300之间还可设置储液器等其他配件；当换热器100作为蒸发器使用时，换热管20内的介质在翅片30的辅助下向外界环境吸热，并且，作为进口的连接管12与节流元件的出口连接，作为出口的连接管12与压缩机200的入口连接，当然，进口的连接管12与节流元件300之间还可设置球阀等其他配件，出口的连接管12与压缩机200之间还可设置气液分离器等其他配件。
请参见图2及图3，集流管10包括多节单元节管13，沿着集流管10的轴线方向，多节单元节管13依次堆叠连接。
具体地，单元节管13包括第一段131及第二段132，第一段131的直径小于第二段132的直径，以使该节的单元节管13能够插入与之相邻的单元节管13的第二段132内，并通过焊接固定。
可以理解的是，在焊接前，集流管10及换热管20的表面均涂有复合层，需要解释的是，复合层为钎焊材料，在焊接时，将换热器100放入钎焊炉里，高温的环境导致钎焊材料融化，从而导致换热管20与集流管10发生沉降，而换热管20的沉降相比集流管10更为显著，换热管20的两端插入集流管10的管槽11内，两端由于受到管槽11槽口的限制，使得换热管20中间的沉降比两端严重，换热管20整体形变，换热管20与管槽11配合也发生倾斜，在焊接时容易虚焊、脱焊。单元节管13的第一段131与相邻的单元节管13的第二段132插接，为每节单元节管13的沉降提供伸缩余量，使得集流管10与换热管20同步沉降，提高焊接效率。
进一步地，每节单元节管13的第一段131与第二段132之间设有弧形段133，弧形段133自第一段131的底部延伸到第二段132的顶部，避免第一段131与第二段132直接连接而存在应力集中。由于集流管10内的介质为变载荷，即，集流管10内的介质对于集流管10的内壁的冲击力不是恒定的，在介质的长期冲击下或者在振动的环境中使用，第一段131与第二段132直接连接会使第一段131与第二段132的连接处因应力集中而发 生断裂，弧形段133能够减少两者之间的应力集中，提高产品使用寿命。
优选地，沿着集流管10的轴线方向，第一段131的长度范围为2mm-6mm，可以理解的是，若第一段131的长度太长，则会减少集流管10的流通量，若第二段132的长度太短，则无法为集流管10的沉降提供伸缩余量，因此，第一段131的长度范围为2mm-6mm为合适的长度范围。第一段131的长度可为2mm、2.5mm、3mm、3.8mm、4mm、4.5mm、5mm、5.3mm、6mm或者2mm-6mm之间的任意数值。
在焊接之前，将第一段131插入相邻的单元节管13的第二段132内，且插入的深度小于第一段131的长度，为每个单元节管13的沉降提供伸缩余量。
优选地，在本实施例中，第一段131的长度为4mm，第一段131插入相邻的单元节管13的第二段132内2mm。在其他实施例中，第一段131的长度还可为其他，第二段132插入相邻的单元节管13的第二段132内的深度还可为其他数值。
单元节管13的第一段131的外壁与与之相邻的所述单元节管13的第二段132的内壁之间的间隙为0.1mm。可以理解的是，单元节管13的第一段131的外壁与与之相邻的所述单元节管13的第二段132的内壁之间存在细微的间隙，既能够使单元节管13的第一段131能够顺利地插入与之相邻的单元节管13的第二段132内，又能够防止两者之间的间隙太大，发生漏焊。
进一步地，每节单元节管13的第一段131、第二段132及弧形段133一体成型，能够缩减焊接的工艺步骤，且可防止三者之间的连接发生泄漏，增加产品可靠性。
请参见图3，第一段131由相对应的单元节管13一端缩口形成，工艺简单，无需额外焊接。
优选地，每节单元节管13的长度相等，每节单元节管13的高度均相等，每节单元节管13的第一段131长度相等，每节单元节管13的第一段131的内径均相等，每节单元节管13的第一段131的外径均相等，每节单元节管13的第二段132的长度均相等，每节单元节管13的第二段132的内径均相等，每节单元节管13的第二段132的外径均相等，且每节单元节管13的弧形段133的弧度相同，方便加工。当然，在其他实施例中，根据不同的设计，每节单元节管13的长度、高度可设计为不同，每节单元节管13的第一段131及第二段132的长度、内径、外径也可设计为不同，每节单元节管13的弧形段133的弧度也可设计为不同。
位于顶部的单元节管13及底部的单元节管13的一端均设有端盖14，即，集流管10的的两端设有端盖14，端盖14密封集流管10，以防止集流管10内的介质泄漏。
在装配过程中，将单元节管13的第一段131插入相邻的单元节管13的第二段132 内，在每节单元节管13及每根换热管20的表面涂上复合层，再将多个换热管20分别对应地插入管槽11内，放入钎焊炉里焊接，复合层因高温熔化，换热管20与集流管10发生沉降，集流管10因多节单元节管13的第一段131与第二段132的相互插接存在伸缩余量，能够与换热管20同步沉降，复合层熔化后，将多节单元节管13及换热管20焊接成整体。
在工作过程中，第一段131及第二段132之间的弧形段133可减少两者之间连接处的应力集中，可防止在振动环境中长期使用，或者在介质的冲击下，发生断裂。
以上所述实施例的各技术特征可以进行任意的组合，为使描述简洁，未对上述实施例中的各个技术特征所有可能的组合都进行描述，然而，只要这些技术特征的组合不存在矛盾，都应当认为是本说明书记载的范围。
以上所述实施例仅表达了本申请的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对申请专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本申请构思的前提下，还可以做出若干变形和改进，这些都属于本申请的保护范围。因此，本申请专利的保护范围应以所附权利要求为准。

Claims (10)

  1. 一种换热器，包括集流管，所述集流管包括多节单元节管，多节所述单元节管依次堆叠连接，每节所述单元节管包括第一段及第二段，所述第一段的直径小于所述第二段的直径，以使所述单元节管的第一段能够插入相邻的所述单元节管的第二段内；
    其特征在于，每节所述单元节管的第一段与第二段之间设有弧形段，所述弧形段自所述第一段的底部延伸至所述第二段的顶部，以使所述第一段与所述第二段连接。
  2. 根据权利要求1所述换热器，其特征在于，沿着所述集流管的轴线方向，所述第一段的长度范围为2mm-6mm。
  3. 根据权利要求1所述换热器，其特征在于，所述单元节管的第一段的外壁与与之相邻的所述单元节管的第二段的内壁之间的间隙为0.1mm。
  4. 根据权利要求1所述换热器，其特征在于，每节所述单元节管的所述第一段、所述第二段及所述弧形段一体成型。
  5. 根据权利要求1所述换热器，其特征在于，每个所述弧形段的弧度均相等。
  6. 根据权利要求1所述换热器，其特征在于，所述第一段由相对应的所述单元节管一端缩口形成。
  7. 根据权利要求1所述换热器，其特征在于，所述换热器还包括多根换热管，每节所述单元节管开设有管槽，多根所述换热管的两端分别插入对应的所述管槽内，以使所述换热管与所述集流管连通。
  8. 根据权利要求1所述换热器，其特征在于，位于顶部的所述单元节管及位于底部的所述单元节管的一端均设有端盖，所述端盖密封所述集流管。
  9. 根据权利要求7所述换热器，其特征在于，所述换热器还包括多层翅片，多层所述翅片分别设于相邻的所述换热管之间，所述翅片自所述换热管的一端延伸至另一端。
  10. 一种制冷系统，其特征在于，包括压缩机、节流元件及如权利要求1-9任意一项所述的换热器，所述换热器分别与所述压缩机及所述节流元件连接。
PCT/CN2020/136137 2019-12-25 2020-12-14 换热器及制冷系统 WO2021129440A1 (zh)

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