WO2023159939A1 - 一种二氧化碳空调热泵系统管路连接法兰密封组件 - Google Patents

一种二氧化碳空调热泵系统管路连接法兰密封组件 Download PDF

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WO2023159939A1
WO2023159939A1 PCT/CN2022/121162 CN2022121162W WO2023159939A1 WO 2023159939 A1 WO2023159939 A1 WO 2023159939A1 CN 2022121162 W CN2022121162 W CN 2022121162W WO 2023159939 A1 WO2023159939 A1 WO 2023159939A1
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Prior art keywords
connecting block
heat pump
carbon dioxide
pump system
block
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PCT/CN2022/121162
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English (en)
French (fr)
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卢春鸿
宋晓伟
黄丽
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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 WO2023159939A1 publication Critical patent/WO2023159939A1/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
    • F16L23/00—Flanged joints
    • F16L23/16—Flanged joints characterised by the sealing means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00507—Details, e.g. mounting arrangements, desaeration devices
    • B60H1/00557—Details of ducts or cables
    • B60H1/00571—Details of ducts or cables of liquid ducts, e.g. for coolant liquids or refrigerants

Definitions

  • the invention relates to spare parts of a vehicle air-conditioning system, in particular to a carbon dioxide air-conditioning heat pump system pipe connection flange sealing assembly.
  • CO 2 is gradually used as the working refrigerant medium in automotive air-conditioning systems.
  • the system must work in the transcritical region, and the working pressure exceeds the critical pressure, which is much higher than the current automotive air conditioning system.
  • the working pressure of the R744 (CO 2 ) air-conditioning heat pump system reaches up to 170 bar and the working temperature is -40°C to 170°C.
  • Patent CN 109519621 B discloses a device for connecting pipelines in a fluid-tight manner, the device has first and second connection blocks connected to the pipeline respectively, and the first and second connection blocks are respectively connected to each other. Sealing surfaces are formed on the facing sides of the blocks and are connected to each other by at least one fastening means.
  • the device has an intermediate element arranged between the connecting pieces, which has a retaining element and a second sealing element. A first sealing element is arranged in the holding element and between the sealing surfaces of the connection block.
  • the holding element is formed with a hollow-cylindrical wall having a first edge and a second edge.
  • the second sealing element is firmly connected to the holding element at a second edge of the holding element.
  • the intermediate element has a recess which extends from a first end formed on the outer side of the second sealing element to a second end.
  • the first end is formed in a conical shape, wherein the oppositely arranged side walls of the recess abut against each other on the outer side of the sealing element.
  • Patent CN110816202A discloses a heat cycle-resistant fastening system for refrigerant fittings, which relates to a block fitting assembly, the block fitting assembly includes a first block, a second block and fasteners, the first block has a For passing through the first fastener aperture of the first block, the second block has a second fastener aperture formed through the second block and axially aligned with the first fastener aperture , the fastener extends through the first fastener aperture and the second fastener aperture to couple the first piece to the second piece.
  • the block fitting assembly includes a thermal expansion compliance feature in the form of at least one of the following: an inner surface of the second block defining a second fastener aperture includes a The threaded portion of the fastener is adjacent to an axially extending non-threaded portion, or the fastener includes a neck portion having an outer diameter smaller than the minor thread diameter of the threaded portion of the fastener.
  • the sealing element 80 in the assembly assembly disclosed in patent CN110816202A includes a metal part 81 surrounded by an elastic part 82.
  • the elastic part 82 is made of rubber or other materials, which is not stable enough under high temperature and high pressure, and there is still a certain risk of leakage.
  • the object of the present invention is to provide a carbon dioxide air-conditioning heat pump system pipeline connection flange sealing assembly in order to solve the above problems.
  • a carbon dioxide air-conditioning heat pump system pipe connection flange seal assembly including a first connection block, a second connection block,
  • the first connection block has a first fluid orifice
  • the first connection block has a protrusion at the end of the first fluid orifice
  • the second connection block has a second fluid orifice corresponding to the first fluid orifice, and the second connection block has a matching protrusion at the end of the second fluid orifice. groove part,
  • the protruding part and the groove part are respectively arranged on the side faces of the first connecting block and the second connecting block, the first connecting block and the second connecting block are connected to each other through at least one fixing mechanism, and the protruding part is located in the groove part;
  • a sealing gasket is provided between the protruding part and the groove part, and the sealing gasket is a hat-shaped gasket with a hole in the middle, which is sheathed on the protruding part.
  • the innovation of the present invention mainly lies in the improvement of the sealing gasket.
  • the existing sealing assembly composed of two parts (including an elastic element) is combined into one to form a cap-shaped gasket.
  • the cap-shaped gasket When installing, it can be conveniently fitted on the protruding part, and after being fixed by press fitting, after the first connecting block and the second connecting block are assembled, they are pressed between the two to form an effective sealing structure.
  • the improvement can not only greatly improve the assembly efficiency of the product, simplify the structure of the sealing gasket assembly, help to reduce the cost, but also improve the stability of the seal. When it vibrates with the vehicle, it is not easy to leak, so as to meet the use of high-pressure tooling Require.
  • the sealing gasket includes a bottom plate, a side panel vertically connected to the bottom plate, and an opening in the middle of the bottom plate.
  • the side panel is provided with an ear plate for easy disassembly, through which the ear plate can be disassembled more easily.
  • sealing gasket is clamped and connected with the protruding part through the side panel.
  • sealing gasket is an integrally formed metal sheet, and the hardness of the gasket core is less than 50HV0.1.
  • the end surfaces of the protruding part and the groove part are respectively provided with an annular protruding tooth protruding from the end surfaces, after the first connecting block and the second connecting block are assembled, under the action of extrusion, the The annular protruding tooth is pressed into the sealing gasket to achieve sealing, and only one annular protruding tooth is designed, which helps to increase the pressing depth and strength of the annular protruding tooth, thereby achieving a better sealing effect.
  • a guide positioning hole and a guide positioning post are provided between the first connection block and the second connection block.
  • first connection block and the second connection block are connected by threaded screw fasteners.
  • first connection block and the second connection block are connected to a pipeline
  • the pipeline is a pipeline of a refrigerant circuit of an air-conditioning system of a motor vehicle.
  • first connecting block and the second connecting block are metal aluminum blocks.
  • the present invention has the following beneficial effects:
  • the sealing assembly is made into a cap-shaped gasket, and the cap-shaped sealing gasket is sleeved on the tubular protrusion of the first connecting block during installation.
  • This structural improvement can greatly simplify the structure of the existing sealing assembly , after the first connection block and the second connection block are assembled, they are pressed between the two, and due to the extrusion effect of the single annular convex tooth on the two contact surfaces, an effective seal is formed.
  • This structure is improved and greatly improved
  • the assembly efficiency of the product helps to reduce costs and improve the stability of the seal. When it vibrates with the vehicle, it is not easy to leak, which meets the requirements for use in high-pressure tooling.
  • FIG. 1 is a schematic diagram of the overall structure of the pipe connection flange sealing assembly of the air-conditioning heat pump system of the present invention
  • Fig. 2 is the structural representation of gasket
  • Fig. 3 is a schematic sectional view of A-A in Fig. 2;
  • Figures 4 and 5 are comparison diagrams of the indentation depths of different areas of the single-ring sealing teeth and the double-ring sealing teeth; A represents the first connecting block (male pressing plate); B represents the second connecting block (female pressing plate).
  • a carbon dioxide air-conditioning heat pump system pipe connection flange seal assembly includes a first connection block 1 and a second connection block 2, the first connection block 1 has a first fluid orifice 12, and the first connection block 1 is in the The end of the first fluid orifice 12 has a protrusion 11, the second connection block 2 has a second fluid orifice 22 corresponding to the first fluid orifice 12, and the second connection block 2 has a second fluid orifice 22 at the end of the second fluid orifice 22.
  • the end portion has a groove portion 21 matching the protruding portion 11.
  • the protruding portion 11 and the groove portion 21 are respectively arranged on the side faces of the first connecting block 1 and the second connecting block 2 respectively.
  • the first connecting block 1 and the second connecting block 1 are connected to each other through at least one fixing mechanism, and the protruding part 11 is located in the groove part 21 ; a sealing gasket 3 is provided between the protruding part 11 and the groove part 21 .
  • the sealing gasket 3 is a cap-shaped gasket with a hole in the middle, which is sheathed on the protrusion 11 .
  • the sealing gasket 3 includes a bottom plate 31 , a side wall 32 vertically connected to the bottom plate 31 and an opening 33 opened in the middle of the bottom plate 31 .
  • the thickness of the bottom plate 31 is greater than that of the side wall 32 .
  • the side panel 32 is provided with an ear plate 34 which is easy to disassemble, through which the ear plate can be disassembled more easily.
  • the sealing gasket 3 is clamped and connected with the protruding part 11 through the side wall plate 32, and can be fixed by pressing during installation.
  • the end surfaces of the protruding part 11 and the groove part 21 are respectively provided with an annular protruding tooth protruding from the end surface.
  • the protruding teeth are pressed into the sealing gasket 3 to realize sealing.
  • the single annular convex tooth structure of the present invention has a better effect.
  • Figures 4 and 5 are the comparison diagrams of the indentation depths of different areas of the single-ring sealing teeth and the double-ring sealing teeth. It can be seen that the indentation depth of the single annular convex tooth is deeper.
  • the sealing gasket 3 is an integrally formed metal sheet, and the hardness of the gasket core is less than 50HV0.1, which is lower than that of the annular convex teeth.
  • the invention avoids the use of non-metal components, and the reliability is greatly enhanced.
  • a guide positioning hole and a guide positioning post are provided between the first connecting block 1 and the second connecting block 2, and the guiding positioning hole and the guiding positioning post are arranged at an end far away from the fluid orifice, through the guiding positioning hole and the guiding positioning post, Make the connection between the two connection blocks better.
  • the first connecting block 1 and the second connecting block 2 are metal aluminum blocks, the first connecting block 1 and the second connecting block 2 are connected by threaded screw fasteners, and the screw fasteners pass through the threaded
  • the connection hole of the hole realizes the tight connection between the first connection block 1 and the second connection block 2 .
  • the first connection block 1 and the second connection block 2 are connected to pipelines, which are the pipelines of the refrigerant circuit of the air-conditioning system of the motor vehicle, and are used to fluidly connect the two fluid delivery components of the associated fluid system .

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Flanged Joints, Insulating Joints, And Other Joints (AREA)

Abstract

一种二氧化碳空调热泵系统管路连接法兰密封组件，包括第一连接块（1）、第二连接块（2），第一连接块（1）具有突出部（11），第二连接块（2）具有凹槽部（21），突出部（11）位于凹槽部（21）内；突出部（11）与凹槽部（21）之间设有密封垫片（3），密封垫片（3）为中间开设有孔洞的帽状垫片，其套设于突出部（11）上。将现有由两部分元件组成的密封组件合二为一，形成一个帽状垫片，该帽状密封垫片在安装时能够很方便的套装在突出部，通过压装固定后，在第一连接块和第二连接块组装后，被压紧在二者之间，形成有效的密封结构，能大大提高产品装配效率，简化密封垫片组件的结构。

Description

一种二氧化碳空调热泵系统管路连接法兰密封组件 技术领域
本发明涉及车辆空调系统的零配件，具体涉及一种二氧化碳空调热泵系统管路连接法兰密封组件。
背景技术
目前，汽车空调系统工作冷媒介质逐渐采用CO 2，CO 2的临界压力高(Pc＝7.38MPa)、临界温度低(Tc＝31.25℃)，为达成良好的综合制冷性能，以二氧化碳为冷媒的制冷系统必须工作在跨临界区域，工作压力超过临界压力，与目前的汽车空调系统相比工作压力要高很多。通常，R744(CO 2)空调热泵系统工作压力最高达到170bar、工作温度-40℃～170℃。
汽车空调系统中的管路连接需要用到法兰连接组件，目前的法兰密封组件包括公端模块、母端模块、密封垫片以及塑料固定件等。专利CN 109519621 B公开了一种用于流体密封地连接管路的装置，装置分别具有与管路连接的第一和第二连接块，所述第一和第二连接块分别在朝另一连接块定向的一侧上构成有密封面并且通过至少一个固定机构彼此连接。装置具有设置在连接块之间的中间元件，其具有保持元件以及第二密封元件。在保持元件中和在连接块的密封面之间设置有第一密封元件。保持元件构成有空心柱形的壁部，所述壁部具有第一边缘和第二边缘。第二密封元件在保持元件的第二边缘处与保持元件牢固连接。中间元件具有凹部，其从在第二密封元件的外侧处构成的第一端部延伸至第二端部。第一端部以锥形形状构成，其中凹部的相对置地设置的侧壁在密封元件的外侧上相互贴靠。
专利CN110816202A公开了用于制冷剂配装件的耐热循环的紧固系统，涉及块配装组件，该块配装组件包括第一块、第二块和紧固件，该第一块具有形成为穿过该第一块的第一紧固件孔口，该第二块具有形成为穿过该第二块且与第一紧固件孔口轴向对准的第二紧固件孔口，该紧固件延伸穿过第一紧固件孔口和第二紧固件孔口以将第一块联接至第二块。该块配装组件包括热膨胀顺应性特征，该热膨胀顺应性特征为如下中的至少一者的形式：第二块的限定第二紧固件孔口的内表面包括与第二紧固件孔口的螺纹部分邻近的轴向延伸的非螺纹部分，或者紧固件包括颈状部分，该颈状部分的外径小于紧固件的螺纹部分的螺纹小径。
然而，专利CN 109519621 B公开的用于流体密封地连接管路的装置中使用中间元件5固定第一密封元件4，中间元件5部件结构复杂，制造成本高，在装配时步骤繁琐，且密封效果不佳。专利CN110816202A公开的配装组件中的密封元件80包括弹性部分82围绕的金属部分81，弹性部分82采用橡胶等材质，在高温高压下不够稳定，仍存在一定泄漏风险。
发明内容
本发明的目的就是为了解决上述问题而提供一种二氧化碳空调热泵系统管路连接法兰密封组件。
本发明的目的通过以下技术方案实现：
一种二氧化碳空调热泵系统管路连接法兰密封组件，包括第一连接块、第二连接块，
所述第一连接块具有第一流体孔口，所述第一连接块在所述第一流体孔口的端部具有突出部，
所述第二连接块具有与所述第一流体孔口相对应的第二流体孔口，所述第二连接块在所述第二流体孔口的端部具有与所述突出部相匹配的凹槽部，
所述突出部与凹槽部分别设置在所述第一连接块与第二连接块在各自朝向的侧面，所述第一连接块与第二连接块通过至少一个固定机构彼此连接，所述突出部位于所述凹槽部内；
所述突出部与所述凹槽部之间设有密封垫片，所述密封垫片为中间开设有孔洞的帽状垫片，其套设于所述突出部上。
本发明的创新点主要在于对密封垫片的改进，将现有由两部分元件组成的密封组件(其中包括一个弹性元件)合二为一，形成一个帽状垫片，该帽状密封垫片在安装时，能够很方便的套装在突出部，通过压装固定后，在第一连接块和第二连接块组装后，被压紧在二者之间，形成有效的密封结构，这种结构改进，不仅能大大提高产品的装配效率，简化密封垫片组件的结构，有助于降低成本，还能够提高密封的稳定性，在随车辆震动时，不容易泄漏，从而满足在高压工装的使用要求。
进一步地，所述的密封垫片包括底板、与所述底板竖直连接的侧围板以及开设于所述底板中间的开孔。
进一步地，所述侧围板上设有便于拆装的耳板，通过耳板，能够更容易的拆卸。
进一步地，所述密封垫片通过所述侧围板与所述突出部卡紧连接。
进一步地，所述密封垫片为一体成型的金属片，垫片芯部硬度＜50HV0.1。
进一步地，所述突出部与所述凹槽部的端面分别设有一个凸出其端面的环形凸齿，所述第一连接块与第二连接块装配后，在挤压作用下，所述环形凸齿压入所述密封垫片实现密封，仅设计一个环形凸齿，有助于提高环形凸齿的压入深度和力度，从而达到更佳的密封效果。
进一步地，所述第一连接块与第二连接块之间设有导向定位孔与导向定位柱。
进一步地，所述第一连接块与第二连接块之间通过带有螺纹的螺杆紧固件连接。
进一步地，所述第一连接块、第二连接块连接管路，所述管路为机动车的空调系统的制冷剂回路的管路。
进一步地，所述第一连接块与第二连接块为金属铝块。
与现有技术相比，本发明具有以下有益效果：
本发明将密封组件做成一个帽状垫片，该帽状密封垫片在安装时，套装在第一连接块的管状突出部，这种结构改进，能极大的简化现有密封组件的结构，在第一连接块和第二连接块组装后，被压紧在二者之间，并且由于两个接触面上单个环形凸齿的挤压作用，形成有效密封，这种结构改进，大大提高产品的装配效率，有助于降低成本，且提高密封的稳定性，在随车辆震动时，不容易泄漏，满足在高压工装的使用要求。
附图说明
图1为本发明空调热泵系统管路连接法兰密封组件的整体结构示意图；
图2为密封垫片的结构示意图；
图3为图2中A-A向剖视示意图；
图4、5为单环密封齿与双环密封齿不同区域压入深度比较图；A表示第一连接块(公压板)；B表示第二连接块(母压板)。
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。
如图1，一种二氧化碳空调热泵系统管路连接法兰密封组件，包括第一连接块 1、第二连接块2，第一连接块1具有第一流体孔口12，第一连接块1在第一流体孔口12的端部具有突出部11，第二连接块2具有与第一流体孔口12相对应的第二流体孔口22，第二连接块2在第二流体孔口22的端部具有与突出部11相匹配的凹槽部21，突出部11与凹槽部21分别设置在第一连接块1与第二连接块2在各自朝向的侧面，第一连接块1与第二连接块2通过至少一个固定机构彼此连接，突出部11位于凹槽部21内；突出部11与凹槽部21之间设有密封垫片3。
如图1、图2，密封垫片3为中间开设有孔洞的帽状垫片，其套设于突出部11上。密封垫片3包括底板31、与底板31竖直连接的侧围板32以及开设于底板31中间的开孔33，底板31的厚度大于侧围板32。侧围板32上设有便于拆装的耳板34，通过耳板，能够更容易的拆卸。密封垫片3通过侧围板32与突出部11卡紧连接，在安装时，通过压装能实现固定。
作为优选的实施方案，突出部11与凹槽部21的端面分别设有一个凸出其端面的环形凸齿，第一连接块1与第二连接块2装配后，在挤压作用下，环形凸齿压入密封垫片3实现密封。相比双环形凸齿结构，本发明采用单个环形凸齿结构具有更佳的效果。图4、5为单环密封齿与双环密封齿不同区域压入深度比较图，可知，单个环形凸齿压入深度更深。
本发明实施例中，密封垫片3为一体成型的金属片，垫片芯部硬度＜50HV0.1，其硬度低于环形凸齿。本发明避免使用非金属元件，可靠性得到很大加强。第一连接块1与第二连接块2之间设有导向定位孔与导向定位柱，导向定位孔与导向定位柱设置在与流体孔口相远离的一端，通过导向定位孔与导向定位柱，使得两个连接块更好的实现连接。
第一连接块1与第二连接块2为金属铝块，第一连接块1与第二连接块2之间通过带有螺纹的螺杆紧固件连接，通过螺杆紧固件穿过带有螺纹孔的连接孔，实现第一连接块1与第二连接块2的紧密连接。使用时，第一连接块1、第二连接块2连接管路，管路为机动车的空调系统的制冷剂回路的管路，用于将相关联的流体系统的两个流体输送部件流体连接。
上述的对实施例的描述是为便于该技术领域的普通技术人员能理解和使用发明。熟悉本领域技术的人员显然可以容易地对这些实施例做出各种修改，并把在此说明的一般原理应用到其他实施例中而不必经过创造性的劳动。因此，本发明不限于上述实施例，本领域技术人员根据本发明的揭示，不脱离本发明范畴所做出的改 进和修改都应该在本发明的保护范围之内。

Claims (10)

  1. 一种二氧化碳空调热泵系统管路连接法兰密封组件，包括第一连接块(1)、第二连接块(2)，
    所述第一连接块(1)具有第一流体孔口(12)，所述第一连接块(1)在所述第一流体孔口(12)的端部具有突出部(11)，
    所述第二连接块(2)具有与所述第一流体孔口(12)相对应的第二流体孔口(22)，所述第二连接块(2)在所述第二流体孔口(22)的端部具有与所述突出部(11)相匹配的凹槽部(21)，
    所述突出部(11)与凹槽部(21)分别设置在所述第一连接块(1)与第二连接块(2)在各自朝向的侧面，所述第一连接块(1)与第二连接块(2)通过至少一个固定机构彼此连接，所述突出部(11)位于所述凹槽部(21)内；
    所述突出部(11)与所述凹槽部(21)之间设有密封垫片(3)，所述密封垫片(3)为中间开设有孔洞的帽状垫片，其套设于所述突出部(11)上。
  2. 根据权利要求1所述的一种二氧化碳空调热泵系统管路连接法兰密封组件，其特征在于，所述的密封垫片(3)包括底板(31)、与所述底板(31)竖直连接的侧围板(32)以及开设于所述底板(31)中间的开孔(33)。
  3. 根据权利要求2所述的一种二氧化碳空调热泵系统管路连接法兰密封组件，其特征在于，所述侧围板(32)上设有便于拆装的耳板(34)。
  4. 根据权利要求2所述的一种二氧化碳空调热泵系统管路连接法兰密封组件，其特征在于，所述密封垫片(3)通过所述侧围板(32)与所述突出部(11)卡紧连接。
  5. 根据权利要求1所述的一种二氧化碳空调热泵系统管路连接法兰密封组件，其特征在于，所述密封垫片(3)为一体成型的金属片，垫片芯部硬度＜50HV0.1。
  6. 根据权利要求1所述的一种二氧化碳空调热泵系统管路连接法兰密封组件，其特征在于，所述突出部(11)与所述凹槽部(21)的端面分别设有一个凸出其端面的环形凸齿，所述第一连接块(1)与第二连接块(2)装配后，在挤压作用下，所述环形凸齿压入所述密封垫片(3)实现密封。
  7. 根据权利要求1所述的一种二氧化碳空调热泵系统管路连接法兰密封组件，其特征在于，所述第一连接块(1)与第二连接块(2)之间设有导向定位孔与导向 定位柱。
  8. 根据权利要求1所述的一种二氧化碳空调热泵系统管路连接法兰密封组件，其特征在于，所述第一连接块(1)与第二连接块(2)之间通过带有螺纹的螺杆紧固件连接。
  9. 根据权利要求1所述的一种二氧化碳空调热泵系统管路连接法兰密封组件，其特征在于，所述第一连接块(1)、第二连接块(2)连接管路，所述管路为机动车的空调系统的制冷剂回路的管路。
  10. 根据权利要求1所述的一种二氧化碳空调热泵系统管路连接法兰密封组件，其特征在于，所述第一连接块(1)与第二连接块(2)为金属铝块。
PCT/CN2022/121162 2022-02-24 2022-09-26 一种二氧化碳空调热泵系统管路连接法兰密封组件 WO2023159939A1 (zh)

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