WO2020244205A1 - 可提高过冷度的过冷装置及空调机组 - Google Patents

可提高过冷度的过冷装置及空调机组 Download PDF

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WO2020244205A1
WO2020244205A1 PCT/CN2019/128416 CN2019128416W WO2020244205A1 WO 2020244205 A1 WO2020244205 A1 WO 2020244205A1 CN 2019128416 W CN2019128416 W CN 2019128416W WO 2020244205 A1 WO2020244205 A1 WO 2020244205A1
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Prior art keywords
hole
supercooling device
supercooling
baffle
refrigerant
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PCT/CN2019/128416
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English (en)
French (fr)
Inventor
刘华
张治平
胡东兵
胡海利
张营
王小勇
杨旭峰
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珠海格力电器股份有限公司
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Publication of WO2020244205A1 publication Critical patent/WO2020244205A1/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
    • F25B40/00—Subcoolers, desuperheaters or superheaters
    • F25B40/02—Subcoolers
    • 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
    • F25B2500/00—Problems to be solved
    • F25B2500/09—Improving heat transfers
    • 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
    • F25B2500/00—Problems to be solved
    • F25B2500/13—Vibrations

Definitions

  • This application relates to the field of air conditioning, and in particular to a supercooling device and an air conditioning unit that can increase the degree of supercooling.
  • the heat exchanger is an important part of the air conditioning unit, and its performance directly affects the overall performance of the air conditioning unit.
  • the energy efficiency of current heat exchangers has been greatly improved.
  • it is also a common method to improve the energy efficiency ratio of the whole machine by increasing the subcooling degree of the heat exchanger through the flash structure.
  • the refrigerant flows through the pores whose cross-sectional area increases sharply, its pressure decreases sharply, causing the refrigerant to evaporate into gas, thereby achieving the effect of supercooling.
  • the existing flash structure often undergoes one flash, so there are disadvantages of low subcooling and large pressure drop.
  • this application proposes a subcooling device and an air conditioning unit that can increase the subcooling.
  • This application proposes a supercooling device, which includes a box body with a refrigerant flow channel, and also includes a plurality of baffles arranged on the refrigerant flow channel at intervals, and a plurality of baffles are provided for installing heat exchange tubes.
  • the mounting holes and flash holes that gradually expand along the direction of refrigerant flow.
  • the baffle is hermetically connected to the inner walls of the four sides of the box body.
  • the distance between two adjacent baffles is greater than 200 mm.
  • the thickness of the baffle is between 10mm-50mm.
  • the flash hole is a circular cone hole, a triangular cone hole, a diamond cone hole or a combination thereof.
  • the baffle is also provided with strip holes for increasing the flow of refrigerant.
  • the strip-shaped hole is parallel to the length of the baffle, and the length of the strip-shaped hole is between 60% and 90% of the length of the baffle.
  • the ratio of the radius R1 at one end of the flash hole to the radius R2 at the other end is in the range of 3:2 to 3:1.
  • the pitch of two adjacent flash holes is between 2.5R1 and 6R1.
  • the flash hole includes one or a combination of at least two of the following hole shapes: circular cone hole, triangular cone hole, and diamond cone hole.
  • the thickness of the baffle is 30 mm.
  • the length of the strip hole is 80% of the length of the baffle.
  • the application also provides an air conditioning unit using the above-mentioned supercooling device.
  • the multi-stage baffle is set to make the fluid pass through the flash hole with a sharply enlarged cross-sectional area for multiple times, and its pressure is sharply reduced, which causes the refrigerant to evaporate into gas, thereby achieving the effect of supercooling and gradually reducing the pressure drop of the fluid.
  • the reduction not only improves the subcooling degree of the heat exchanger, but also helps to reduce the undesirable vibration caused by the excessive fluid pressure change.
  • Figure 1 is a schematic diagram of the organization of the application
  • Figure 2 is a front view of the baffle in an embodiment of the application
  • FIG. 3 is a side view of the baffle of Figure 2;
  • Figure 4 is a front view of a baffle in another embodiment of the application.
  • FIG. 5 is a side view of the baffle of Figure 4.
  • Figure 6 is a front view of a baffle in another embodiment of the application.
  • Figure 7 is a side view of the baffle of Figure 6;
  • the present application proposes a supercooling device, including: a box body 1 of the supercooling device.
  • the box body is elongated.
  • the refrigerant flows from one end of the box body 1 to form a refrigerant flow channel.
  • a plurality of baffles 2 located on the refrigerant flow channel are arranged at intervals, and the baffles 2 are provided with a plurality of mounting holes 21 for installing heat exchange tubes and a plurality of flash holes 22 gradually increasing in the direction of refrigerant flow.
  • the pressure of the fluid decreases sharply when the fluid passes through the flash hole 22 whose cross-sectional area increases sharply, resulting in the refrigerant Evaporate into gas to achieve the effect of subcooling. Due to the installation of multiple spaced baffles, the effect of multi-stage flashing is achieved. The pressure drop of the fluid is gradually reduced, which not only improves the subcooling of the heat exchanger, but also helps To attenuate undesirable vibration caused by excessive fluid pressure changes.
  • the box body 1 is formed by a combination of two upper and lower sealing plates and two left and right side plates.
  • the baffle 2 is arranged perpendicular to the sealing plate, the side plate and the inner side surface, and is connected to the inner side of the sealing plate and the side plate in a sealing manner. No gap is left to ensure that the refrigerant only flows out of the opening on the baffle 2.
  • the minimum distance between two adjacent baffles 2 is 1 to 2 times the distance between the left and right side plates.
  • the minimum distance between the baffles is not less than 200mm, and the thickness of the baffle The interval is 10mm to 50mm, and the optimal setting is 30mm.
  • the baffle 2 is provided with strip holes 23 along the length of the baffle 2 to increase the flow of refrigerant.
  • the mounting holes 21 are arranged in an array.
  • flash holes 22 are arranged at intervals along the length of the baffle 2, wherein the length of the upper strip hole 23 is 60% to 90% of the length of the baffle, which can be set as a block in a specific embodiment. 80% of the board length.
  • the flash hole 22 may be a circular cone hole, a triangular cone hole, a diamond cone hole, or a combination thereof. That is to say, the flash hole 22 includes one or a combination of at least two of the following hole shapes: a circular cone hole, a triangular cone hole, and a diamond cone hole.
  • the triangular taper hole and the rhombus taper hole are both equilateral triangle or rhombus.
  • the number ratio of the baffle with a circular cone hole, the baffle with a circular cone hole and the baffle with a diamond cone hole can be 1:1:1. It can be 2:1:1.
  • the ratio of the radius R1 of the larger end of the flash hole 22 to the radius R2 of the smaller end is in the range of 3:2 to 3:1, and the best setting can be 2:1.
  • the pitch interval of two adjacent flash holes 22 is 2.5R1 to 6R1.
  • This application also proposes an air-conditioning unit.
  • the above-mentioned supercooling device is used in the heat exchanger of the air-conditioning unit.
  • the air-conditioning unit is a water-cooled unit.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

本申请公开了一种可提高过冷度的过冷装置及空调机组，包括具有冷媒流道的盒体，还包括间隔设置在所述冷媒流道上的多块挡板，所述挡板上设有多个用于安装换热管的安装孔和沿着冷媒流动方向逐渐扩大的闪发孔。本申请通过设置多级挡板，使流体多次穿过横截面积急剧变大的闪发孔时其压力急剧减小而导致冷媒蒸发成气体，从而达到过冷的效果，使流体压降逐步降低，既提高了换热器的过冷度，也有助于减弱因流体压力变化过大而导致的不良振动。

Description

可提高过冷度的过冷装置及空调机组
本申请要求于2019年06月03日提交至中国国家知识产权局、申请号为201910478467.X，发明名称为“可提高冷度的过冷装置及空调机组”的专利申请的优先权。
技术领域
本申请涉及空调领域，尤其涉及一种可提高过冷度的过冷装置及空调机组。
背景技术
换热器作为空调机组的重要组成部分，其性能的高低直接影响到空调机组的整体性能。通过采用性能更加高效的冷媒，换热效率更好的换热管，以及更优的换热管管束分布等手段，现行的换热器能效得到了很大提升。此外，通过闪发结构提升换热器过冷度来提高整机的能效比也是一种常用方法。当冷媒流过横截面面积急剧变大的孔道时，其压力急剧减小而导致冷媒蒸发成气体，从而达到过冷的效果。但是现有闪发结构往往经过一次闪发所以存在过冷度低和压降大的缺点。
发明内容
为了解决换热器存在过冷度低的缺陷，本申请提出了一种可提高过冷度的过冷装置及空调机组。
本申请提出了一种过冷装置，包括具有冷媒流道的盒体，还包括间隔设置在所述冷媒流道上的多块挡板，所述挡板上设有多个用于安装换热管的安装孔和沿着冷媒流动方向逐渐扩大的闪发孔。
在一些实施例中，所述挡板与盒体四个侧面的内壁密封连接。
在一些实施例中，相邻两块所述挡板之间的间距大于200mm。
在一些实施例中，所述挡板的厚度在10mm-50mm之间。
在一些实施例中，所述闪发孔为圆形锥孔、三角形锥孔、菱形锥孔或其组合。
在一些实施例中，所述挡板上还设有增加冷媒流通量的条形孔。
在一些实施例中，所述条形孔与挡板的长度方向平行，所述条形孔的长度为挡板长度的60％至90％之间。
在一些实施例中，所述闪发孔一端的半径R1与另一端的半径R2的比值区间为3:2至3:1。
在一些实施例中，相邻两个所述闪发孔的孔距在2.5R1至6R1之间。
在一些实施例中，闪发孔包括以下孔形中的一种或至少两种的组合：圆形锥孔、三角形锥孔、菱形锥孔。
在一些实施例中，挡板的厚度为30mm。
在一些实施例中，条形孔的长度为挡板长度的80％。
本申请还提供了一种空调机组，使用上述的过冷装置。
本申请通过设置多级挡板，使流体多次穿过横截面积急剧变大的闪发孔时其压力急剧减小而导致冷媒蒸发成气体，从而达到过冷的效果，使流体压降逐步降低，既提高了换热器的过冷度，也有助于减弱因流体压力变化过大而导致的不良振动。
附图说明
下面结合实施例和附图对本申请进行详细说明，其中：
图1为本申请的机构示意图；
图2为本申请一实施例中挡板的正视图；
图3为图2挡板的侧视图；
图4为本申请另一实施例中挡板的正视图；
图5为图4挡板的侧视图；
图6为本申请又一实施例中挡板的正视图；
图7为图6挡板的侧视图。
具体实施方式
如图1所示，本申请提出了一种过冷装置，包括：过冷装置的盒体1，盒体呈长条状，冷媒从盒体1的一端流入形成冷媒流道，盒体1内间隔设置有多块位于冷媒流道上的挡板2，挡板2上设有多个安装换热管的安装孔21和多个沿着冷媒流动方向逐渐空大的闪发孔22。通过设置多块间隔的挡板2，当流体冲击到挡板2上的闪发孔22区域时，通过流体穿过横截面积急剧变大的闪发孔22时其压力急剧减小而导致冷媒蒸发成气体，从而达到过冷的效果，由于设置了多块间隔的挡板从而达到了多级闪发的效果，使流体压降逐步降低，既提高了换热器的过冷度，也有助于减弱因流体压力变化过大而导致的不良振动。
在一些实施例中，盒体1通过上下两块封板以及左右两块侧板组合形成，挡板2垂直封板和侧板和内侧面设置，并与封板和侧板的内侧面密封连接不留间隙，保证冷媒只从挡板2上的开孔流出。其中，相邻两块挡板2之间的最小间距为左右侧板间距的1倍至2倍，考虑到一次闪发压降不可过大，挡板的最小间距不小于200mm，挡板的厚度区间为10mm至50mm，最优可设置为30mm。
在一些实施例中如图2至图7所示，挡板2的上方开有沿挡板2长度方向设置的条形孔23，用于增加冷媒流通量，安装孔21呈阵列排布设置在挡板2的中部，闪发孔22沿挡板2的长度方向间隔设置，其中，上方条形孔23的长度为挡板长度的60％至90％，在具体的实施例中可设置为挡板长度的80％。
在具体的实施例中，闪发孔22可以为圆形锥孔、三角形锥孔、菱形锥孔或 其组合。也就是说，闪发孔22包括以下孔形中的一种或至少两种的组合：圆形锥孔、三角形锥孔、菱形锥孔。其中三角形锥孔和菱形锥孔都为正三角形或正菱形。在过冷装置的具体设置中，单独带有圆形锥孔的挡板、单独带有圆形锥孔和单独带有菱形锥孔的挡板的数量配比可以为1:1:1，也可以为2:1:1。当其为圆形锥孔时，闪发孔22较大一端的半径R1与较小一端的半径R2的比值区间为3:2至3:1，最优可设置为2:1。其中，相邻两个闪发孔22的孔距区间为2.5R1至6R1。
本申请还提出一种空调机组，空调机组的换热器中使用上述过冷装置，在具体的实施例中，空调机组为水冷机组。
以上所述仅为本申请的较佳实施例而已，并不用以限制本申请，凡在本申请的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本申请的保护范围之内。

Claims (13)

  1. 一种过冷装置，包括具有冷媒流道的盒体(1)，其特征在于，所述过冷装置还包括间隔设置在所述冷媒流道上的多块挡板(2)，所述挡板(2)上设有多个用于安装换热管的安装孔(21)和沿着冷媒流动方向逐渐扩大的闪发孔(22)。
  2. 如权利要求1所述的过冷装置，其特征在于，所述挡板(2)与盒体(1)四个侧面的内壁密封连接。
  3. 如权利要求1所述的过冷装置，其特征在于，相邻两块所述挡板(2)之间的间距大于200mm。
  4. 如权利要求1所述的过冷装置，其特征在于，所述挡板(2)的厚度在10mm至50mm之间。
  5. 如权利要求1所述的过冷装置，其特征在于，所述闪发孔(22)为圆形锥孔、三角形锥孔、菱形锥孔或其组合。
  6. 如权利要求1所述的过冷装置，其特征在于，所述挡板(2)上还设有增加冷媒流通量的条形孔(23)。
  7. 如权利要求6所述的过冷装置，其特征在于，所述条形孔(23)与所述挡板(2)的长度方向平行，所述条形孔(23)的长度为挡板长度的60％至90％之间。
  8. 如权利要求1所述的过冷装置，其特征在于，所述闪发孔(22)一端的半径R1与另一端的半径R2的比值区间为3:2至3:1。
  9. 如权利要求8所述的过冷装置，其特征在于，相邻两个所述闪发孔(22)的孔距在2.5R1至6R1之间。
  10. 如权利要求1所述的过冷装置，其特征在于，所述闪发孔(22)包括 以下孔形中的一种或至少两种的组合：圆形锥孔、三角形锥孔、菱形锥孔。
  11. 如权利要求1所述的过冷装置，其特征在于，所述挡板(2)的厚度为30mm。
  12. 如权利要求6所述的过冷装置，其特征在于，所述条形孔(23)的长度为挡板长度的80％。
  13. 一种空调机组，其特征在于，使用如权利要求1至12中任一项所述的过冷装置。
PCT/CN2019/128416 2019-06-03 2019-12-25 可提高过冷度的过冷装置及空调机组 WO2020244205A1 (zh)

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CN203413884U (zh) * 2013-07-31 2014-01-29 浙江国祥空调设备有限公司 一种新型高效壳管式水冷凝器
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CN207379122U (zh) * 2017-11-05 2018-05-18 广东吉荣空调有限公司 用于蒸汽压缩制冷循环的节流膨胀装置
CN109114850A (zh) * 2018-09-18 2019-01-01 郑州云海信息技术有限公司 一种制冷***过冷却装置
CN110207430A (zh) * 2019-06-03 2019-09-06 珠海格力电器股份有限公司 可提高过冷度的过冷装置及空调机组

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