CN111336841A - A wrap-around microchannel heat exchanger - Google Patents

A wrap-around microchannel heat exchanger Download PDF

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CN111336841A
CN111336841A CN202010090943.3A CN202010090943A CN111336841A CN 111336841 A CN111336841 A CN 111336841A CN 202010090943 A CN202010090943 A CN 202010090943A CN 111336841 A CN111336841 A CN 111336841A
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heat exchange
microchannel heat
fluid
liquid
microchannel
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周文杰
虞寿仁
虞忠卫
金火权
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Hangzhou Dianzi University
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Hangzhou Dianzi University
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28DHEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/16Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02Header boxes; End plates
    • F28F9/04Arrangements for sealing elements into header boxes or end plates
    • F28F9/16Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling
    • F28F9/18Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by welding

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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)

Abstract

The invention discloses a surrounding type microchannel heat exchanger. The shell of the invention is connected with a liquid inlet pipe and a liquid outlet pipe of a fluid I and a liquid inlet pipe and a liquid outlet pipe of a fluid II. The heat exchanger core comprises a plurality of micro-channel heat exchange units; every microchannel heat exchange unit structure is the same, all includes two collector tubes and many microchannel heat exchange tubes, and two collector tubes are inserted respectively at the both ends of many microchannel heat exchange tubes. The microchannel heat exchange units are divided into two groups, wherein the microchannel heat exchange tubes of one group of microchannel heat exchange units are longitudinally arranged, the microchannel heat exchange tubes of the other group of microchannel heat exchange units are transversely arranged, the microchannel heat exchange units in one group and the microchannel heat exchange units in the other group are arranged in a staggered mode, and all the microchannel heat exchange units are arranged in parallel. The invention provides a heat exchange unit with a plurality of micro-channels arranged in a staggered manner, which has higher heat exchange efficiency, can discharge more micro-channel heat exchange tubes in the same space and enhances the heat exchange effect.

Description

一种围叠式微通道换热器A wrap-around microchannel heat exchanger

技术领域technical field

本发明属于换热器技术领域,涉及一种围叠式微通道换热器,可以广泛用于存在液体-液体、液体-相变液体换热的所有换热器。The invention belongs to the technical field of heat exchangers, and relates to a stacked microchannel heat exchanger, which can be widely used in all heat exchangers with liquid-liquid and liquid-phase change liquid heat exchange.

背景技术Background technique

上世纪七十年代的石油危机之后,节能技术和新能源开发成为了世界各国研究的重点。商用和工业空调系统一般采用液体-液体换热器,其中最常用的是板式和管壳换热器。由于板式换热器受其结构的影响,密封线长度过长,不能承受很高的压力,钎焊形式不易清洗,同时板式换热器受模具的影响,改变尺寸投入资金较大。管壳式换热器由于管道直径较大,单位体积的换热面积小于微通道换热器换热面积。微型化小型化的板式换热器不适合大能量的换热需求。大能量,高热流密度,灵活性高,方便维修,结构紧凑,重量轻,效率高的换热器是目前换热器研究的方向。因此,一种围叠式金属圆管换热器具有结构紧凑,单位体积,单位重量换热效率高的优点,可以广泛应用于液体-液体换热的应用场合。After the oil crisis in the 1970s, energy-saving technologies and new energy development have become the focus of research around the world. Commercial and industrial air conditioning systems typically employ liquid-to-liquid heat exchangers, the most common of which are plate and shell and tube heat exchangers. Because the plate heat exchanger is affected by its structure, the length of the sealing line is too long, and it cannot withstand high pressure, and the brazing form is not easy to clean. Due to the large diameter of the pipe, the heat exchange area per unit volume of the shell and tube heat exchanger is smaller than that of the microchannel heat exchanger. Miniaturized and miniaturized plate heat exchangers are not suitable for large-energy heat exchange requirements. High energy, high heat flux density, high flexibility, easy maintenance, compact structure, light weight and high efficiency heat exchangers are the current research directions of heat exchangers. Therefore, a wrap-around metal circular tube heat exchanger has the advantages of compact structure, high heat exchange efficiency per unit volume and unit weight, and can be widely used in liquid-liquid heat exchange applications.

专利公开号为CN203336996U的中国专利文献公开了一种微型微通道金属圆管液冷型换热器,其所述的换热机构由冷媒进口管和出口管通过微通道金属圆管连接构成,且所述微型微通道金属圆管的内径在0.1~0.4mm之间,整个换热机构设置在冷却液容器内。并且,该发明将微通道金属圆管作为主要换热机构,管外流动的液体主要是冷却或者加热管内流体作用。该结构因为会有较大的压降,不利于高流速管内流动场合。The Chinese patent document with the patent publication number CN203336996U discloses a micro-micro-channel metal circular tube liquid-cooled heat exchanger, wherein the heat exchange mechanism is formed by connecting the refrigerant inlet tube and the outlet tube through the micro-channel metal circular tube, and The inner diameter of the micro-micro-channel metal circular tube is between 0.1 and 0.4 mm, and the entire heat exchange mechanism is arranged in the cooling liquid container. In addition, the invention uses the micro-channel metal circular tube as the main heat exchange mechanism, and the liquid flowing outside the tube mainly cools or heats the fluid in the tube. Because of the large pressure drop, this structure is not conducive to the flow in the high-velocity pipe.

发明内容SUMMARY OF THE INVENTION

本发明的目的就是针对现有技术的不足,提供了一种围叠式微通道换热器,该微通道换热器结构紧凑的、节能节材,单位重量换热效率高,能够减少制冷剂充注量。The purpose of the present invention is to address the deficiencies of the prior art, and to provide a stacked micro-channel heat exchanger, which has a compact structure, is energy-saving and material-saving, has high heat exchange efficiency per unit weight, and can reduce refrigerant charge. fluence.

本发明包括壳体,壳体上连接流体Ⅰ进液管、流体Ⅰ出液管和流体Ⅱ进液管、流体Ⅱ出液管。流体Ⅰ进液管和流体Ⅰ出液管连接壳体的内部空间,并分设在壳体相对的两个侧面;壳体内设置有换热器芯体,流体Ⅱ进液管和流体Ⅱ出液管分别接换热器芯体的进口和出口。The invention comprises a casing, which is connected with a fluid I liquid inlet pipe, a fluid I liquid outlet pipe, a fluid II liquid inlet pipe, and a fluid II liquid outlet pipe. The fluid I liquid inlet pipe and the fluid I liquid outlet pipe are connected to the inner space of the shell and are arranged on two opposite sides of the shell; the shell is provided with a heat exchanger core, the fluid II liquid inlet pipe and the fluid II liquid outlet pipe Connect to the inlet and outlet of the heat exchanger core respectively.

所述的换热器芯体包括多个微通道换热单元;每个微通道换热单元结构相同,均包括两根集液管和多根微通道换热管。The heat exchanger core body includes a plurality of microchannel heat exchange units; each microchannel heat exchange unit has the same structure and includes two liquid collecting tubes and a plurality of microchannel heat exchange tubes.

所述的集液管为半圆形截面的直线金属管,包括平面管壁和弧面管壁,两个集液管的平面管壁相对设置,集液管平面管壁上开有通孔,多个通孔矩阵排列,多根微通道换热管的两端分别插入两个集液管平面管壁上的多个通孔内,并通过焊接进行密封和固定。The liquid collecting pipe is a straight metal pipe with a semicircular section, including a flat pipe wall and an arc surface pipe wall. A plurality of through holes are arranged in a matrix, and both ends of the plurality of micro-channel heat exchange tubes are respectively inserted into the plurality of through holes on the flat tube walls of the two liquid collectors, and are sealed and fixed by welding.

构成每个微通道换热单元的两根集液管均一端封闭,另一端开放,且两根集液管的开放端对角设置;微通道换热管为两端开放的薄壁金属圆管,相邻两根微通道换热管的管芯距离为1.5~2.5D,D为微通道换热管的外径。The two liquid collecting tubes constituting each microchannel heat exchange unit are closed at one end and open at the other end, and the open ends of the two liquid collecting tubes are arranged diagonally; the microchannel heat exchange tubes are thin-walled metal circular tubes with open ends at both ends. , the distance between the cores of two adjacent microchannel heat exchange tubes is 1.5-2.5D, and D is the outer diameter of the microchannel heat exchange tubes.

微通道换热单元分为两组,其中一组微通道换热单元的微通道换热管纵向排列,另一组微通道换热单元的微通道换热管横向排列,一组中的微通道换热单元与另一组中的微通道换热单元交错设置,所有微通道换热单元平行设置。The microchannel heat exchange units are divided into two groups, wherein the microchannel heat exchange tubes of one group of microchannel heat exchange units are arranged longitudinally, and the microchannel heat exchange tubes of the other group of microchannel heat exchange units are arranged horizontally. The heat exchange units are arranged staggered with the microchannel heat exchange units in another group, and all the microchannel heat exchange units are arranged in parallel.

构成一个组的微通道换热单元中的所有一侧的集液管的开放端通过进液管路连通,进液管路一端封闭,另一端开放;所有另一侧的集液管的开放端通过出液管路连通,出液管路一端封闭,另一端开放;即每组微通道换热单元并联,并联后的两组组微通道换热单元的进液管路的开放端连通,并连接流体Ⅱ进液管;并联后的两组组微通道换热单元的出液管路的开放端连通,并连接流体Ⅱ出液管。The open ends of the liquid collectors on all sides of the microchannel heat exchange units constituting a group are communicated through the liquid inlet pipeline, one end of the liquid inlet pipeline is closed, and the other end is open; all the open ends of the liquid collectors on the other side Connected through the liquid outlet pipeline, one end of the liquid outlet pipeline is closed, and the other end is open; that is, each group of microchannel heat exchange units is connected in parallel, and the open ends of the liquid inlet pipelines of the two groups of microchannel heat exchange units after parallel connection are connected, and the The fluid II inlet pipe is connected; the open ends of the liquid outlet pipes of the two groups of microchannel heat exchange units after parallel connection are connected, and the fluid II outlet pipe is connected.

进一步,所述的微通道换热管的外径D=0.5~2mm,内径d=0.3~1.8mm。Further, the outer diameter of the micro-channel heat exchange tube is D=0.5-2mm, and the inner diameter d=0.3-1.8mm.

本发明提出了错位放置多个微通道换热单元,换热效率更高,并节省了换热器整体体积。本发明在相同空间内可以排放更多的微通道换热管,提高换热面积,增强换热效果。本发明结构简单,重量较轻,体积小,材料使用较少,换热性能提升明显。The invention proposes to displace a plurality of micro-channel heat exchange units, so that the heat exchange efficiency is higher and the overall volume of the heat exchanger is saved. The invention can discharge more micro-channel heat exchange tubes in the same space, increase the heat exchange area and enhance the heat exchange effect. The invention has the advantages of simple structure, light weight, small volume, less material usage, and obvious improvement of heat exchange performance.

附图说明Description of drawings

图1为本发明的结构示意图;Fig. 1 is the structural representation of the present invention;

图2为图1中微通道换热单元示意图;Fig. 2 is the schematic diagram of the microchannel heat exchange unit in Fig. 1;

图3为图2中单个微通道换热单元A-A剖视图;3 is a sectional view of a single microchannel heat exchange unit A-A in FIG. 2;

图4为图2中单个微通道换热单元B-B剖视图。FIG. 4 is a cross-sectional view of a single microchannel heat exchange unit B-B in FIG. 2 .

具体实施方式Detailed ways

下面结合附图对本发明做进一步说明。The present invention will be further described below with reference to the accompanying drawings.

如图1所示,一种微通道液冷换热器,包括壳体1,壳体1上连接流体Ⅰ进液管1-1、流体Ⅰ出液管1-2和流体Ⅱ进液管1-3、流体Ⅱ出液管1-4,流体Ⅰ进液管1-1和流体Ⅰ出液管1-2连接壳体1内部空间,并分设在壳体1相对的两个侧面。壳体1内设置有换热器芯体,流体Ⅱ进液管1-3和流体Ⅱ出液管1-4分别接换热器芯体的进口和出口。As shown in Figure 1, a microchannel liquid-cooled heat exchanger includes a shell 1, and the shell 1 is connected with a fluid I liquid inlet pipe 1-1, a fluid I liquid outlet pipe 1-2 and a fluid II liquid inlet pipe 1 -3. Fluid II outlet pipe 1-4, fluid I inlet pipe 1-1 and fluid I outlet pipe 1-2 are connected to the inner space of shell 1, and are respectively arranged on two opposite sides of shell 1. The shell 1 is provided with a heat exchanger core body, and the fluid II liquid inlet pipe 1-3 and the fluid II liquid outlet pipe 1-4 are respectively connected to the inlet and outlet of the heat exchanger core body.

如图1、2、3、4所示,换热器芯体包括多个微通道换热单元2,每个微通道换热单元2结构相同,均包括两根集液管2-1和多根微通道换热管2-2。集液管2-1为半圆形截面的直线金属管,包括平面管壁和弧面管壁,两个集液管2-1的平面管壁相对设置,集液管2-1平面管壁上开有通孔,多个通孔矩阵排列,多根微通道换热管2-2的两端分别插入两个集液管2-1平面管壁上的多个通孔内,并通过焊接进行密封和固定。As shown in Figures 1, 2, 3, and 4, the heat exchanger core includes a plurality of microchannel heat exchange units 2, and each microchannel heat exchange unit 2 has the same structure, including two liquid collection pipes 2-1 and a plurality of Root microchannel heat exchange tube 2-2. The liquid collecting pipe 2-1 is a straight metal pipe with a semicircular section, including a flat pipe wall and an arc surface pipe wall. There are through holes on the top, and a plurality of through holes are arranged in a matrix. Seal and secure.

构成每个微通道换热单元2的两根集液管2-1均一端封闭,另一端开放,且两根集液管的开放端对角设置。微通道换热管2-2为两端开放的薄壁金属圆管,相邻两根微通道换热管管芯距离为1.5~2.5D,微通道换热管的外径D=0.5~2mm,内径d=0.3~1.8mm。The two liquid collecting pipes 2-1 constituting each microchannel heat exchange unit 2 are closed at one end and open at the other end, and the open ends of the two liquid collecting pipes are arranged diagonally. The micro-channel heat exchange tube 2-2 is a thin-walled metal circular tube with both ends open. The distance between the cores of two adjacent micro-channel heat-exchange tubes is 1.5-2.5D, and the outer diameter of the micro-channel heat-exchange tube is D=0.5-2mm , inner diameter d=0.3~1.8mm.

如图2,微通道换热单元2分为两组(本实施例中每组包括四个微通道换热单元),其中一组微通道换热单元2的微通道换热管2-2纵向排列(即集液管2-1横向设置),另一组微通道换热单元2的微通道换热管2-2横向排列(即集液管2-1纵向设置),一组中的微通道换热单元2与另一组中的微通道换热单元2交错设置,所有微通道换热单元2平行设置。集液管2-1错位放置,微通道换热管2-2整齐平行堆叠,节省空间,有利于安排进出液体出口在一个面上。相邻的两个微通道换热单元2的微通道换热管2-2交错排列,避免管壁外液体朝一个方向快速流动,可以有效提高换热率。As shown in FIG. 2 , the microchannel heat exchange units 2 are divided into two groups (in this embodiment, each group includes four microchannel heat exchange units), wherein the microchannel heat exchange tubes 2-2 of one group of microchannel heat exchange units 2 are longitudinally Arrangement (that is, the liquid collector tubes 2-1 are arranged horizontally), the microchannel heat exchange tubes 2-2 of the other group of microchannel heat exchange units 2 are arranged horizontally (that is, the liquid collector tubes 2-1 are arranged vertically), and the microchannel heat exchange tubes 2-2 of the other group of microchannel heat exchange units The channel heat exchange units 2 are arranged alternately with the microchannel heat exchange units 2 in another group, and all the microchannel heat exchange units 2 are arranged in parallel. The liquid collector tubes 2-1 are placed in dislocation, and the microchannel heat exchange tubes 2-2 are neatly stacked in parallel, which saves space and facilitates arranging the inlet and outlet liquid outlets on one surface. The microchannel heat exchange tubes 2-2 of two adjacent microchannel heat exchange units 2 are arranged in a staggered manner to prevent the liquid outside the tube wall from rapidly flowing in one direction, which can effectively improve the heat exchange rate.

构成一个组的微通道换热单元2中的所有一侧的集液管2-1的开放端通过进液管路连通,进液管路一端封闭,另一端开放;所有另一侧的集液管2-1的开放端通过出液管路连通,出液管路一端封闭,另一端开放;即每组微通道换热单元2并联;并联后的两组组微通道换热单元的进液管路的开放端连通,并连接流体Ⅱ进液管1-3;并联后的两组组微通道换热单元的出液管路的开放端连通,并连接流体Ⅱ出液管1-4。The open ends of the liquid collection pipes 2-1 on all sides of the microchannel heat exchange unit 2 constituting a group are communicated through the liquid inlet pipeline, one end of the liquid inlet pipeline is closed, and the other end is open; all the liquid collection pipes on the other side The open end of the pipe 2-1 is connected through the liquid outlet pipeline, one end of the liquid outlet pipeline is closed, and the other end is open; that is, each group of microchannel heat exchange units 2 are connected in parallel; The open ends of the pipelines are connected and connected to the fluid II liquid inlet pipes 1-3; the open ends of the liquid outlet pipes of the two groups of parallel microchannel heat exchange units are connected and connected to the fluid II liquid outlet pipes 1-4.

下面以单个采用长460mm,宽200mm,高14mm的微通道换热单元为例,对该围叠式微通道换热器性能进行分析。The following takes a single microchannel heat exchange unit with a length of 460mm, a width of 200mm and a height of 14mm as an example to analyze the performance of the stacked microchannel heat exchanger.

微通道换热管0.38mm的不锈钢微通道圆管,每排有100根微通道圆管,共4排。在R410A为制冷工质的标准工况下,以20℃的自来水作为微通道外冷却液体(即流体Ⅰ),入口温度是79℃,通过实验测试得到制冷剂出口温度是22℃。冷却水流量为700kg/h,制冷剂工质(即流体Ⅱ)流量为152.8kg/h。先对水侧的换热热阻进行计算,计算水侧的雷诺数ReD:ReD=ρwater·Velwater·DoutwaterThe microchannel heat exchange tube is 0.38mm stainless steel microchannel round tube, each row has 100 microchannel round tubes, a total of 4 rows. Under the standard condition of R410A as the refrigerant, tap water at 20°C is used as the cooling liquid outside the microchannel (ie, fluid I), the inlet temperature is 79°C, and the outlet temperature of the refrigerant is 22°C through experimental tests. The cooling water flow rate is 700kg/h, and the refrigerant working medium (ie, fluid II) flow rate is 152.8kg/h. The heat transfer resistance on the water side is first calculated, and the Reynolds number Re D on the water side is calculated: Re Dwater ·Vel water ·D outwater .

因此,对应的Nusselt数表示为:

Figure BDA0002383704300000031
Therefore, the corresponding Nusselt number is expressed as:
Figure BDA0002383704300000031

水侧的热阻为:

Figure BDA0002383704300000032
The thermal resistance on the water side is:
Figure BDA0002383704300000032

R410A侧的雷诺数为:

Figure BDA0002383704300000033
The Reynolds number on the R410A side is:
Figure BDA0002383704300000033

忽略不锈钢管的热阻,由于其壁厚较薄,热阻较小。Ignoring the thermal resistance of the stainless steel tube, the thermal resistance is smaller due to its thinner wall thickness.

制冷剂侧的热阻为:

Figure BDA0002383704300000041
The thermal resistance on the refrigerant side is:
Figure BDA0002383704300000041

采用e-NTU传热单元数法计算换热量:

Figure BDA0002383704300000042
Calculate the heat transfer using the e-NTU heat transfer unit number method:
Figure BDA0002383704300000042

换热器换热效率计算:

Figure BDA0002383704300000043
Calculation of heat exchange efficiency of heat exchanger:
Figure BDA0002383704300000043

微通道单元体换热量(最大换热量)计算:

Figure BDA0002383704300000044
Calculation of the heat exchange (maximum heat exchange) of the microchannel unit body:
Figure BDA0002383704300000044

计算得到冷凝器换热性能可以达到8083W,水侧对流换热系数高达1744W/m2-K,微通道内工质的对流换热系数为70W/m2-K。换热器总换热效率达到82.46%,其芯体重量仅为0.4kg左右。It is calculated that the heat transfer performance of the condenser can reach 8083W, the convective heat transfer coefficient of the water side is as high as 1744W/m 2 -K, and the convective heat transfer coefficient of the working fluid in the microchannel is 70W/m 2 -K. The total heat exchange efficiency of the heat exchanger reaches 82.46%, and its core weight is only about 0.4kg.

板式换热器高压工质和低压工质的容积比通常为1,壳管式换热器高压和低压的容积比通常小于1,而围叠式微通道换热器的高压工质和低压工质的容积比从0.1~0.03之间变化。相同体积,相同工况下的换热量本发明是板式换热器的10倍,壳管式换热器的10~30倍,更加有利于进行深度完全换热的应用场合。The volume ratio of the high pressure working fluid and the low pressure working fluid in the plate heat exchanger is usually 1, the volume ratio between the high pressure and the low pressure in the shell and tube heat exchanger is usually less than 1, and the high pressure working fluid and the low pressure working fluid in the stacked microchannel heat exchanger The volume ratio varies from 0.1 to 0.03. The heat exchange of the same volume and the same working conditions is 10 times that of the plate heat exchanger and 10 to 30 times that of the shell and tube heat exchanger, which is more conducive to the application of deep and complete heat exchange.

Claims (2)

1. A folding type microchannel heat exchanger comprises a shell (1), wherein a fluid I inlet pipe (1-1), a fluid I outlet pipe (1-2), a fluid II inlet pipe (1-3) and a fluid II outlet pipe (1-4) are connected to the shell (1); the method is characterized in that:
the fluid I inlet pipe (1-1) and the fluid I outlet pipe (1-2) are connected with the inner space of the shell (1) and are respectively arranged on two opposite side surfaces of the shell (1); a heat exchanger core is arranged in the shell (1), and a fluid inlet pipe (1-3) and a fluid outlet pipe (1-4) of the fluid II are respectively connected with an inlet and an outlet of the heat exchanger core;
the heat exchanger core comprises a plurality of micro-channel heat exchange units (2); each micro-channel heat exchange unit (2) has the same structure and comprises two liquid collecting pipes (2-1) and a plurality of micro-channel heat exchange pipes (2-2);
the liquid collecting pipes (2-1) are linear metal pipes with semicircular sections and comprise plane pipe walls and cambered surface pipe walls, the plane pipe walls of the two liquid collecting pipes (2-1) are arranged oppositely, through holes are formed in the plane pipe walls of the liquid collecting pipes (2-1), a plurality of through holes are arranged in a matrix mode, and two ends of a plurality of micro-channel heat exchange pipes (2-2) are inserted into the through holes in the plane pipe walls of the two liquid collecting pipes (2-1) respectively and are sealed and fixed through welding;
one end of each of the two liquid collecting pipes (2-1) forming each micro-channel heat exchange unit (2) is closed, the other end of each of the two liquid collecting pipes is open, and the open ends of the two liquid collecting pipes are arranged diagonally; the microchannel heat exchange tubes (2-2) are thin-wall metal round tubes with two open ends, the tube core distance of two adjacent microchannel heat exchange tubes is 1.5-2.5D, and D is the outer diameter of each microchannel heat exchange tube;
the microchannel heat exchange units are divided into two groups, wherein the microchannel heat exchange tubes (2-2) of one group of microchannel heat exchange units are longitudinally arranged, the microchannel heat exchange tubes (2-2) of the other group of microchannel heat exchange units are transversely arranged, the microchannel heat exchange units (2) in one group and the microchannel heat exchange units (2) in the other group are arranged in a staggered mode, and all the microchannel heat exchange units (2) are arranged in parallel;
the open ends of the liquid collecting pipes (2-1) at all sides in the micro-channel heat exchange units (2) forming one group are communicated through a liquid inlet pipeline, one end of the liquid inlet pipeline is closed, and the other end of the liquid inlet pipeline is open; the open ends of all the liquid collecting pipes (2-1) on the other side are communicated through liquid outlet pipes, one ends of the liquid outlet pipes are closed, and the other ends of the liquid outlet pipes are open; each group of micro-channel heat exchange units (2) are connected in parallel, and the open ends of the liquid inlet pipelines of the two groups of micro-channel heat exchange units which are connected in parallel are communicated and connected with a liquid inlet pipe (1-3) of a fluid II; the open ends of the liquid outlet pipelines of the two groups of micro-channel heat exchange units which are connected in parallel are communicated and connected with liquid outlet pipes (1-4) of the fluid II.
2. The stacked microchannel heat exchanger of claim 1, wherein: the outer diameter D of the microchannel heat exchange tube is 0.5-2 mm, and the inner diameter D is 0.3-1.8 mm.
CN202010090943.3A 2020-02-13 2020-02-13 A wrap-around microchannel heat exchanger Pending CN111336841A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113606603A (en) * 2021-08-31 2021-11-05 北京中电联节能技术有限公司 Heat exchanger
CN113790476A (en) * 2021-09-01 2021-12-14 中山富雪泰制冷设备有限公司 Efficient energy-saving emission-reducing condensing unit and air conditioner
CN114938605A (en) * 2022-05-14 2022-08-23 西北工业大学 A cooling system and application

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EP2015017A1 (en) * 2007-07-12 2009-01-14 Hexion Specialty Chemicals Research Belgium S.A. Heat exchanger
CN104154801A (en) * 2014-08-14 2014-11-19 丹佛斯微通道换热器(嘉兴)有限公司 Collecting pipe and heat exchanger
CN204154153U (en) * 2014-10-17 2015-02-11 夏文庆 A kind of longitude and latitude staggered pipe heat exchanger
CN106440910A (en) * 2016-09-06 2017-02-22 珠海格力电器股份有限公司 Micro-channel heat exchanger, manufacturing method and air conditioner

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Publication number Priority date Publication date Assignee Title
EP2015017A1 (en) * 2007-07-12 2009-01-14 Hexion Specialty Chemicals Research Belgium S.A. Heat exchanger
CN104154801A (en) * 2014-08-14 2014-11-19 丹佛斯微通道换热器(嘉兴)有限公司 Collecting pipe and heat exchanger
CN204154153U (en) * 2014-10-17 2015-02-11 夏文庆 A kind of longitude and latitude staggered pipe heat exchanger
CN106440910A (en) * 2016-09-06 2017-02-22 珠海格力电器股份有限公司 Micro-channel heat exchanger, manufacturing method and air conditioner

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113606603A (en) * 2021-08-31 2021-11-05 北京中电联节能技术有限公司 Heat exchanger
CN113790476A (en) * 2021-09-01 2021-12-14 中山富雪泰制冷设备有限公司 Efficient energy-saving emission-reducing condensing unit and air conditioner
CN114938605A (en) * 2022-05-14 2022-08-23 西北工业大学 A cooling system and application

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