WO2022100277A1 - 一种用于r744空调热泵系统管路接口的密封结构 - Google Patents

一种用于r744空调热泵系统管路接口的密封结构 Download PDF

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WO2022100277A1
WO2022100277A1 PCT/CN2021/118900 CN2021118900W WO2022100277A1 WO 2022100277 A1 WO2022100277 A1 WO 2022100277A1 CN 2021118900 W CN2021118900 W CN 2021118900W WO 2022100277 A1 WO2022100277 A1 WO 2022100277A1
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air
conditioning
joint
sealing structure
heat pump
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PCT/CN2021/118900
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English (en)
French (fr)
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卢春鸿
宋晓伟
郑美玲
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上海众源燃油分配器制造有限公司
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Publication of WO2022100277A1 publication Critical patent/WO2022100277A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L33/00—Arrangements for connecting hoses to rigid members; Rigid hose connectors, i.e. single members engaging both hoses
    • F16L33/02—Hose-clips
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L13/00—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints
    • F16L13/02—Welded joints

Definitions

  • the invention relates to the technical field of R744 air-conditioning heat pump systems, in particular to a sealing structure for the pipeline interface of the R744 air-conditioning heat pump system.
  • CO2 stands out among many substitutes because of its green environmental protection and excellent thermophysical properties.
  • the temperature difference in the gas cooler is large, which makes it widely used in the heat pump hot water system.
  • the working pressure of R744(C02) air-conditioning heat pump system is up to 170bar, and the working temperature is -40°C ⁇ 170°C.
  • the R744(C02) air-conditioning pipeline interface is connected by pressing plate through bolts, and is realized by compressing metal gasket or non-metal elastic washer
  • the non-metal elastic gasket only plays a fixed role, and the metal gasket is easily damaged, sensitive and fragile, and the risk of leakage is extremely high.
  • the most common method is to eccentrically compress the metal gasket on the end face of the pressure plate, and the compression deformation of this compression method is not uniform enough.
  • connection and sealing method has high requirements on the machining dimensional accuracy of the parts, and if the parts do not match each other during assembly, the effective sealing cannot be achieved, that is, the structure of the pressure plate cannot meet the high pressure (170bar) air conditioning pipeline. and high and low temperature (-40°C ⁇ 170°C) performance requirements; at the same time, there is a certain risk in its durability under high and low temperature cycle pulses in actual working conditions.
  • the purpose of the present invention is to provide a sealing structure for the pipeline interface of R744 air-conditioning heat pump system in order to overcome the above-mentioned defects in the prior art. With the tightening effect of the nut, a more reliable and stable sealing effect can be achieved.
  • a sealing structure for a pipeline interface of an R744 air-conditioning heat pump system comprising an air-conditioning hard pipe, an air-conditioning hose, and an air-conditioning pipe counterpart set outside the air-conditioning hose, and also includes a connecting piece connected with the air-conditioning pipe counterpart, and an air-conditioning pipe counterpart.
  • the connecting piece is a ball joint that is sealed and connected, and a transition joint that is connected to the ball joint, and the transition joint is connected to the air-conditioning hard pipe.
  • the spherical joint is sealed with the connecting piece after being provided with a spherical gasket.
  • the connecting piece is provided with a central through hole for penetrating the air-conditioning hose in the connecting direction with the air-conditioning pipe counterpart and the ball joint.
  • the central portion of the connecting end of the connecting piece and the ball joint is provided with an inner concave portion with an inner diameter larger than the inner diameter of the central through hole for accommodating the head of the ball joint.
  • the spherical joint includes a cube head, a sphere and a sleeve rod connected in sequence, the sphere includes a first hemisphere and a second hemisphere that are connected to each other, and the diameter of the second hemisphere is larger than the diameter of the second hemisphere.
  • the diameter of the hemisphere, the first hemisphere is connected with the head of the cube, and the second hemisphere is connected with the sleeve rod.
  • the inner concave portion includes a square concave hole and a conical surface concave hole connected with the square concave hole, and the shape and volume of the square concave hole are matched with the shape and volume of the cube head, The shape and size of the conical surface concave hole are matched with the shape and volume of the first hemisphere.
  • a nut is provided on the joint between the two.
  • the spherical gasket is a metal spherical gasket.
  • the sleeve rod of the ball joint is welded with one end of the transition joint, and the other end of the transition joint is welded with the air conditioner hard pipe.
  • the pipe wall thickness of the transition joint is greater than the pipe wall thickness of the air conditioning hose.
  • the sealing structure of the pipeline interface of the air-conditioning heat pump system provided by the present invention at least includes the following beneficial effects:
  • the metal ball washer is embedded and installed on the ball joint. It can be connected in place through the square head of the ball joint and the square concave hole in the connector. Use the nut to tighten the connector.
  • the ball joint is axially tightened and squeezed through the nut.
  • the pressure causes the metal gasket on the joint to deform locally to achieve sealing.
  • the ball head is used to compress the metal spherical gasket axially.
  • the compression deformation of the ball head axial sealing method is very uniform, and the turnover compression of the metal spherical gasket is uniform. Compared with the prior art, it has a more reliable sealing effect, is easier to install to achieve high-pressure sealing, and can meet the performance requirements of the air-conditioning pipeline under high pressure (170bar) and high and low temperature (-40°C ⁇ 170°C).
  • the sealing structure of the present invention does not require high precision for the parts, and the fitting and matching requirements of the pipeline interface are low, which can greatly improve the application range of the sealing structure.
  • Fig. 1 is the structural schematic diagram of the sealing structure used for the pipeline interface of R744 air-conditioning heat pump system in the embodiment
  • Fig. 2 is the structural schematic diagram of the connector of the sealing structure used for the pipeline interface of the R744 air-conditioning heat pump system in the embodiment;
  • FIG. 3 is a schematic structural diagram of a spherical joint sleeved with a metal spherical gasket for the sealing structure of the pipeline interface of the R744 air-conditioning heat pump system in the embodiment;
  • Air-conditioning pipe pair 2. Connecting piece, 3. Metal spherical gasket, 4. Ball joint, 5. Nut, 6. Transition joint, 7. Air-conditioning hard pipe, 8. Air-conditioning hose, 21. Square concave hole , 22, conical concave hole, 41, cube head, 42, sphere, 43, sleeve rod.
  • the invention relates to a sealing structure for the pipeline interface of the R744 air-conditioning heat pump system.
  • the structure of the invention adopts the ball head axial compression.
  • the metal gasket seal can make the gasket turnover compression even.
  • FIG. 1 The structure of the sealing structure of the present invention is shown in FIG.
  • the air-conditioning pipe pair 1 is set outside the air-conditioning hose 8, and the air-conditioning pipe pair 1 is connected to the ball joint 4 through the connecting piece 2.
  • the air-conditioning hose 8 extends from the air-conditioning pipe pair 1, the connecting piece 2, and the ball joint 2 in turn. .
  • the other end of the ball joint 4 is connected to the transition joint 6 , the wall thickness of the transition joint 6 is greater than the wall thickness of the hose, and the transition joint 6 is connected to the air conditioning hard pipe 7 .
  • the ball joint 4 includes a square head 41 , a sphere 42 and a sleeve rod 43 which are connected in sequence.
  • the contact surface of the sphere 42 and the square head 41 is a square horizontal plane.
  • the sphere 42 includes a small diameter hemisphere and a large diameter hemisphere connected to each other.
  • the hemisphere with a small diameter is connected with the cube head 41
  • the hemisphere with a large diameter is connected with the sleeve rod 43 .
  • the connecting piece 2 is provided with a central through hole from the connection with the air-conditioning pipe pair 1 to the connection with the ball joint 4 for passing through the air-conditioning hose 8 .
  • the central part of the connecting end of the connecting piece 2 and the ball joint 4 is provided with an inner concave portion whose inner diameter is larger than the inner diameter of the central through hole.
  • the shape and volume of the square concave hole 21 match with the square head 41 of the ball joint 4 .
  • the shape and size of the conical surface concave hole 22 are adapted to the shape and volume of the hemisphere with the small diameter of the sphere 42 .
  • the metal spherical gasket 3 is embedded on the small diameter hemisphere of the spherical joint 4, the square head 41 of the spherical joint 4 is inserted into the square recess 21 of the connecting piece 2, and then the connecting piece 2 and the spherical joint 4 are connected.
  • a nut 5 is set on the outer part of the place, so that the ball joint 4 and the connecting piece 2 are tightened, and the nut 5 drives the ball joint 4 to squeeze the conical surface concave hole 22 of the connecting piece 2, so that the conical surface concave hole 22 and the hemispherical outer surface of the sphere 42 form a
  • the sealing structure of the complementary conical surface, the deformation of the contact part between the metal spherical gasket 3 and the cone angle realizes the sealing.
  • the sleeve rod 43 of the ball joint 4 is welded with one end of the transition joint 6 , and the other end of the transition joint 6 is welded with the air conditioning hard pipe 7 .
  • the invention adopts the metal spherical gasket to be embedded and installed on the spherical joint, and can be connected in place with the square concave hole in the connecting piece through the protruding square body (square head) of the head of the spherical joint.
  • the nut and the connector are tightened, and the spherical joint is axially tightened and squeezed by the nut to locally deform the metal gasket on the joint to achieve sealing, which can meet the requirements of high pressure (170bar) and high and low temperature (-40°C ⁇ 170°C) of the air-conditioning pipeline. performance requirements under the working conditions.
  • the sealing structure does not require high precision for parts, and low requirements for fitting and matching of pipeline interfaces.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Joints Allowing Movement (AREA)
  • Joints With Pressure Members (AREA)

Abstract

一种用于R744空调热泵系统管路接口的密封结构，包括空调硬管（7）、空调软管（8）、套设在空调软管（8）外的空调管对手件（1），与空调管对手件（1）连接的连接件（2）、与连接件（2）密封连接的球形接头（4），以及与球形接头（4）连接的过渡接头（6），过渡接头（6）连接空调硬管（7），球形接头（4）外套设金属球形垫片（3）后与连接件（2）密封连接，金属球形垫片（3）通过外嵌安装在球形接头（4）上，通过球形接头（4）头部凸出方身与连接件（2）内凹方槽连接到位；螺母（5）与连接件（2）拧紧，球形接头（4）通过螺母（5）轴向拧紧挤压使接头上的金属球形垫片（3）局部产生变形实现密封。与现有技术相比，其具有密封稳定可靠，适用范围广泛，装配要求低等优点。

Description

一种用于R744空调热泵系统管路接口的密封结构 技术领域
本发明涉及R744空调热泵系统技术领域，尤其是涉及一种用于R744空调热泵系统管路接口的密封结构。
背景技术
目前，在面临开发制冷剂代物的环境下，CO2以绿色环保和优良的热物性，在众多替代物中脱颖而出。CO2在跨临界循环状态，气体冷却器中存在的温差大，更使在热泵热水系统中得到了广泛的应用。
R744(C02)空调热泵系统工作压力最高达到170bar、工作温度-40℃～170℃，目前R744(C02)空调管路接口采用压板通过螺栓打紧进行连接，通过压缩金属垫片或非金属弹性垫圈实现密封，然而非金属弹性垫圈只起到固定作用，金属垫片极易损伤，很敏感及脆弱，泄露风险极高。对于使用的具体密封手段，采用较多的方法是压板端面偏心压缩金属垫片密封，这种压缩方式的压缩变形量不够均匀。且这种连接及密封方式对零件的加工尺寸精度要求较高，而若发生装配时零件相互匹配不佳的情况，则无法实现有效密封，即压板的结构无法满足空调管路在高压(170bar)及高低温(-40℃～170℃)的工作情况下的性能要求；同时在实际工况高低温循环脉冲下其耐久性存在一定风险。
发明内容
本发明的目的就是为了克服上述现有技术存在的缺陷而提供一种用于R744空调热泵系统管路接口的密封结构，通过采用球头轴向压缩金属垫片密封，垫片周转压缩量均匀，配合螺母的拧紧作用，能够达到更加可靠、稳定的密封效果。
本发明的目的可以通过以下技术方案来实现：
一种用于R744空调热泵系统管路接口的密封结构，包括空调硬管、空调软管以及套设在空调软管外的空调管对手件，还包括与空调管对手件连接的连接件、与连接件密封连接的球形接头，以及与球形接头连接的过渡接头，所述过渡接头连接所述空调硬管。
进一步地，所述球形接头外套设球形垫片后与所述连接件密封连接。
进一步地，所述连接件在与空调管对手件、球形接头的连接方向上设有用以贯穿空调软管的中央通孔。
进一步地，所述连接件与球形接头的连接端的中心部位设有内径大于所述中央通孔内径的用以容置球形接头头部的内凹部。
进一步地，所述球形接头包括依次连接的方体头部、球体和套杆，所述球体包括相互连接的第一半球体和第二半球体，所述第二半球体的直径大于所述第一半球体的直径，所述第一半球体与所述方体头部连接，所述第二半球体与所述套杆连接。
进一步地，所述内凹部包括方形凹孔以及与所述方形凹孔连接的锥面凹孔，所述方形凹孔的形状、体积大小与所述方体头部的形状、体积大小相匹配，所述锥面凹孔的形状、尺寸与所述第一半球体的形状、体积大小相匹配。
进一步地，所述球形接头通过所述内凹部与所述连接件连接后，二者的连接处外套设螺母。
进一步地，所述球形垫片为金属球形垫片。
进一步地，所述球形接头的套杆与所述过渡接头的一端焊接，所述过渡接头的另一端与所述空调硬管焊接。
进一步地，所述过渡接头的管壁厚度大于所述空调软管的管壁厚度。
本发明提供的空调热泵系统管路接口的密封结构，相较于现有技术至少包括如下有益效果：
1)采用金属球形垫片外嵌安装在球形接头上，可通过球形接头的方体头部与连接件内的方形凹孔连接到位，利用螺母与连接件拧紧，球形接头通过螺母轴向拧紧挤压使接头上的金属垫片局部产生变形实现密封，采用球头轴向压缩金属球形垫片密封，球头轴向密封方式压缩变形量都十分均匀，金属球形垫片周转压缩量均匀，相比与现有技术具有更可靠的密封效果，更容易安装实现高压密封，能够满足空调管路在高压(170bar)及高低温(-40℃～170℃)的工作情况下的性能要求。
2)本发明密封结构对零件要求精度不高，管路接口装配匹配要求低，可大大提高该密封结构的使用范围。
3)可实现管路重复安装，只需更换金属球形垫片即可，更换费用低、装配要求更低。
附图说明
图1为实施例中用于R744空调热泵系统管路接口的密封结构的结构示意图；
图2为实施例中用于R744空调热泵系统管路接口的密封结构的连接件的结构示意图；
图3为实施例中用于R744空调热泵系统管路接口的密封结构的套设金属球形垫片的球形接头的结构示意图；
图中标号所示：
1、空调管对手件，2、连接件，3、金属球形垫片，4、球形接头，5、螺母，6、过渡接头，7、空调硬管，8、空调软管，21、方形凹孔，22、锥面凹孔，41、方体头部，42、球体，43、套杆。
具体实施方式
下面结合附图和具体实施例对本发明进行详细说明。显然，所描述的实施例是本发明的一部分实施例，而不是全部实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动的前提下所获得的所有其他实施例，都应属于本发明保护的范围。
本发明涉及一种用于R744空调热泵系统管路接口的密封结构，相比于目前R744(C02)空调管压板采用压板端面偏心压缩金属垫片密封的方式，本发明结构采用球头轴向压缩金属垫片密封，能够使得垫片周转压缩量均匀。
本发明密封结构的结构如图1所示，包括：空调管对手件1、连接件2、金属球形垫片3、球形接头4、螺母5、过渡接头6和空调硬管7。
空调管对手件1套设在空调软管8外，空调管对手件1通过连接件2连接球形接头4，空调软管8从空调管对手件1、连接件2、球形接头2内依次伸出。球形接头4的另一端连接过渡接头6，过渡接头6的管壁厚度大于软管的壁厚，过渡接头6连接空调硬管7。
球形接头4包括依次连接的方体头部41、球体42和套杆43。球体42与方体头部41的接触面为方形水平面。球体42包括相互连接的直径小的半球体和直径大的半球体。直径小的半球体与方体头部41连接，直径大的半球体与套杆43连接。
连接件2从与空调管对手件1的连接处到与球形接头4的连接处设有中央通孔，用于贯穿空调软管8。连接件2与球形接头4的连接端的中心部位设有内径大于中央通孔内径的内凹部，该内凹部由内侧的方形凹孔21和与方形凹孔21连接的 锥面凹孔22组成。方形凹孔21的形状、体积大小与球形接头4的方体头部41相匹配。锥面凹孔22的形状、尺寸与球体42的直径小的半球体的形状、体积大小相适配。
金属球形垫片3套嵌在球形接头4的直径小的半球体上，球形接头4的方体头部41插入连接件2的方形凹孔21内，然后在连接件2、球形接头4的连接处外套设螺母5，使得球形接头4与连接件2拧紧，螺母5带动球形接头4挤压连接件2的锥面凹孔22，使得锥面凹孔22与球体42的半球形外表面形成具有互补圆锥形表面的密封结构，金属球形垫片3与锥角接触部位形变实现密封。密封连接后，球形接头4的套杆43与过渡接头6的一端焊接，过渡接头6的另一端与空调硬管7焊接。
本发明采用金属球形垫片外嵌安装在球形接头上，可通过球形接头的头部凸出方身(方体头部)与连接件内的方形凹孔连接到位。利用螺母与连接件拧紧，球形接头通过螺母轴向拧紧挤压使接头上的金属垫片局部产生变形实现密封，能够满足空调管路在高压(170bar)及高低温(-40℃～170℃)的工作情况下的性能要求。此外，密封结构对零件要求精度不高，对管路接口装配匹配要求低。
以上所述，仅为本发明的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的工作人员在本发明揭露的技术范围内，可轻易想到各种等效的修改或替换，这些修改或替换都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应以权利要求的保护范围为准。

Claims (10)

  1. 一种用于R744空调热泵系统管路接口的密封结构，包括空调硬管(7)、空调软管(8)以及套设在空调软管(8)外的空调管对手件(1)，其特征在于，还包括与空调管对手件(1)连接的连接件(2)、与连接件(2)密封连接的球形接头(4)，以及与球形接头(4)连接的过渡接头(6)，所述过渡接头(6)连接所述空调硬管(7)。
  2. 根据权利要求1所述的用于R744空调热泵系统管路接口的密封结构，其特征在于，所述球形接头(4)外套设球形垫片后与所述连接件(2)密封连接。
  3. 根据权利要求1所述的用于R744空调热泵系统管路接口的密封结构，其特征在于，所述连接件(2)在与空调管对手件(1)、球形接头(4)的连接方向上设有用以贯穿空调软管(8)的中央通孔。
  4. 根据权利要求3所述的用于R744空调热泵系统管路接口的密封结构，其特征在于，所述连接件(2)与球形接头(4)的连接端的中心部位设有内径大于所述中央通孔内径的用以容置球形接头(4)头部的内凹部。
  5. 根据权利要求4所述的用于R744空调热泵系统管路接口的密封结构，其特征在于，所述球形接头(4)包括依次连接的方体头部(41)、球体(42)和套杆(43)，所述球体(42)包括相互连接的第一半球体和第二半球体，所述第二半球体的直径大于所述第一半球体的直径，所述第一半球体与所述方体头部(41)连接，所述第二半球体与所述套杆(43)连接。
  6. 根据权利要求5所述的用于R744空调热泵系统管路接口的密封结构，其特征在于，所述内凹部包括方形凹孔(21)以及与所述方形凹孔(21)连接的锥面凹孔(22)，所述方形凹孔(21)的形状、体积大小与所述方体头部(41)的形状、体积大小相匹配，所述锥面凹孔(22)的形状、尺寸与所述第一半球体的形状、体积大小相匹配。
  7. 根据权利要求6所述的用于R744空调热泵系统管路接口的密封结构，其特征在于，所述球形接头(4)通过所述内凹部与所述连接件(2)连接后，二者的连接处外套设螺母(5)。
  8. 根据权利要求2所述的用于R744空调热泵系统管路接口的密封结构，其特征在于，所述球形垫片为金属球形垫片(3)。
  9. 根据权利要求5所述的用于R744空调热泵系统管路接口的密封结构，其特征在于，所述球形接头(4)的套杆(43)与所述过渡接头(6)的一端焊接，所述过渡接头(6)的另一端与所述空调硬管(7)焊接。
  10. 根据权利要求1所述的用于R744空调热泵系统管路接口的密封结构，其特征在于，所述过渡接头(6)的管壁厚度大于所述空调软管(8)的管壁厚度。
PCT/CN2021/118900 2020-11-11 2021-09-17 一种用于r744空调热泵系统管路接口的密封结构 WO2022100277A1 (zh)

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