WO2020052445A1 - 换向阀及其滑块 - Google Patents

换向阀及其滑块 Download PDF

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Publication number
WO2020052445A1
WO2020052445A1 PCT/CN2019/103294 CN2019103294W WO2020052445A1 WO 2020052445 A1 WO2020052445 A1 WO 2020052445A1 CN 2019103294 W CN2019103294 W CN 2019103294W WO 2020052445 A1 WO2020052445 A1 WO 2020052445A1
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WIPO (PCT)
Prior art keywords
slider
sealing sheet
support pin
slider body
slider according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2019/103294
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English (en)
French (fr)
Inventor
陈建军
邵巨灿
孙俊杰
肖槟
刘海波
方艺
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang DunAn Hetian Metal Co Ltd
Original Assignee
Zhejiang DunAn Hetian Metal Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN201821478668.7U external-priority patent/CN209146369U/zh
Priority claimed from CN201821485889.7U external-priority patent/CN209146388U/zh
Application filed by Zhejiang DunAn Hetian Metal Co Ltd filed Critical Zhejiang DunAn Hetian Metal Co Ltd
Publication of WO2020052445A1 publication Critical patent/WO2020052445A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
    • F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
    • F16K11/06—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
    • F16K11/065—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members

Definitions

  • the invention relates to the technical field of refrigerant reversing on a four-way valve, in particular to a reversing valve and a slider thereof.
  • the directional valve is mainly used to change the flow direction of the refrigerant to switch the cooling mode and heating mode.
  • the reversing valve usually includes a valve seat, a slider slidably disposed on the valve seat and capable of selectively blocking the refrigerant passage on the valve seat, wherein a sealing piece is provided on the slider to seal the valve seat and the slider Perform contact seal.
  • the slide block is used to block the refrigerant passage on the valve seat.
  • the refrigerant enters the slide block, and the refrigerant entering the slide block has a certain pressure, which will invade between the slide block and the sealing piece.
  • the gap may easily cause the sealing sheet to peel off the slider, thereby causing the slider to fail, thereby causing the entire directional valve to fail, affecting the switching effect of the directional valve.
  • a slider includes a slider body having a concave cavity, and a sealing sheet provided on an open side of the concave cavity on the slider body, the sealing sheet is attached to the slider body, and The sealing sheet forms a sealing contact surface with the slider body; wherein the sealing sheet and / or the slider body is provided with an exhaust hole, and one end of the exhaust hole extends to the sealing contact surface.
  • the exhaust hole is provided on the sealing sheet and penetrates the sealing sheet.
  • a center line of the exhaust hole is perpendicular to a plane where the sealing contact surface is located.
  • the number of the exhaust holes is at least one, and when the number of the exhaust holes is plural, a plurality of the exhaust holes are evenly arranged on the sealing sheet.
  • the number of the exhaust holes is two, and the two exhaust holes are disposed on two opposite sides of a center line on the sealing sheet.
  • the exhaust hole is provided on the slider body and penetrates the slider body.
  • a center line of the exhaust hole is perpendicular to a plane where the sealing contact surface is located.
  • the number of the exhaust holes is at least one, and when the number of the exhaust holes is plural, a plurality of the exhaust holes are evenly arranged on the slider body.
  • the number of the exhaust holes is two, and the two exhaust holes are disposed on two opposite sides of a center line on the slider body.
  • sealing sheet and the slider body are respectively provided with exhaust holes.
  • the exhaust hole on the sealing sheet is in communication with the exhaust hole on the slider body.
  • the slider body is provided with a groove for cooperating with the sealing sheet at a position on the opening side of the cavity, and the sealing sheet is correspondingly provided on the groove of the slider body.
  • sealing sheet is fixed on the slider body through a concavo-convex fit between the sealing sheet and the groove.
  • the slider further includes a support pin, which extends across the open side of the cavity in the slider body, and is connected and fixed with the slider body.
  • the support pin includes a support pin top, a support pin bottom provided opposite to the support pin top, and two support pin side portions configured to connect the support pin top and the support pin bottom and are oppositely disposed; Two side portions of the support pin are respectively disposed near two opposite side walls of the cavity; an end surface of the top of the support pin is an arc structure, and end surfaces of the two support pin side portions are each a flat structure.
  • top of the support pin and the two sides of the two support pins are connected smoothly through a circular arc surface.
  • the end surface of the bottom of the support pin is set as a flat structure.
  • the end surface of the bottom of the support pin is an arc surface, and the convex direction of the arc surface is a direction away from the top of the support pin.
  • the bottom of the support pin and the two sides of the two support pins are connected smoothly through a circular arc surface.
  • the end surface of the bottom of the support pin includes a plane section and an arc section.
  • the end surface of the bottom of the brace pin includes two plane segments and one arc surface segment, the two plane segments correspond to one of the two brace pin side portions and are connected, and the arc surface segment is provided in two The positions between the plane sections of the sections, and the convex direction of the arc section is a direction away from the top of the support pin.
  • the two flat sections are connected to the two side portions of the support pins through a smooth arc surface, respectively.
  • the technical solution also provides a directional valve, which includes a slider, and the slider is any one of the sliders described above.
  • the present invention has the following advantages over the prior art:
  • the reversing valve and its slider provided by the present invention are provided with the structure of the exhaust hole on the slider, so that when the slider is applied to the reversing valve, the refrigerant enters the sealed contact between the slider body and the sealing sheet. It can be discharged outward through the exhaust hole when it is on the surface, so as to ensure the stability of the connection between the seal sheet and the slider body, prevent the seal sheet from detaching from the slider body, and then ensure that the slider is in the direction valve It has the effect of extending the service life.
  • FIG. 1 is a schematic structural diagram of a slider according to Embodiment 1 of the present invention.
  • Figure 2 is a bottom view of Figure 1;
  • FIG. 3 is a schematic structural diagram of a slider according to Embodiment 2 of the present invention.
  • Figure 4 is a top view of Figure 3;
  • FIG. 5 is a schematic cross-sectional view of a stay pin according to the present invention.
  • FIG. 6 is a schematic cross-sectional view of a stay pin according to the present invention.
  • FIG. 7 is a schematic cross-sectional view of a stay pin according to the present invention.
  • a slider provided by the present invention includes a slider body 10 having a cavity 11 and a sealing sheet 20 provided on the opening side of the cavity 11 on the slider body 10. .
  • the sealing sheet 20 is adhered to the slider body 10 and a sealing contact surface 21 is formed; the sealing sheet 20 and / or the slider body 10 is provided with an exhaust hole 30, and the row An opening at one end of the air hole 30 extends to the sealing contact surface 21, that is, an opening at one end of the exhaust hole 30 is provided at a position where the sealing contact surface 21 is located.
  • the refrigerant will damage the sealing contact surface 21 of the sealing sheet 20 and the slider body 10, forcing the sealing sheet 20 to peel off the slider body 10, resulting in the failure of the slider and the use of the slider.
  • An exhaust hole 30 is provided on the sealing sheet 20 or the slider body 10, so that in the refrigerant resistance test, after the refrigerant invades the sealing contact surface of the slider body 10 and the sealing sheet 20, it can be discharged through the exhaust hole 30, so that the refrigerant will not
  • the sealing contact surface 21 of the sealing sheet 20 and the slider body 10 is destroyed, and the slider body 10 and the sealing sheet 20 can still closely adhere to each other, which prevents the sealing sheet 20 from peeling off the slider body 10, the slider does not fail, and the Service life and maintenance costs are reduced accordingly.
  • the exhaust hole 30 is provided on the sealing sheet 20 and penetrates through the sealing sheet 20.
  • One end port of the exhaust hole 30 communicates with the sealing contact surface 21, so that When the refrigerant enters the position of the sealing contact surface 21, it can be discharged through the exhaust hole 30 communicating with the sealing contact surface 21 to prevent the refrigerant from damaging the seal between the sealing sheet 20 and the slider body 10.
  • the center line of the exhaust hole 30 in this embodiment is perpendicular to the plane where the sealing contact surface 21 is located, so that the exhaust of the exhaust hole 30 is fast and the process is simple.
  • the exhaust hole 30 may be disposed at an angle with the sealing contact surface 21, and only needs to ensure that it communicates with the sealing contact surface 21 and penetrates the sealing sheet 20, so that the refrigerant can pass through the exhaust hole. 30 is smoothly discharged out of the sealing sheet 20.
  • the number of the exhaust holes 30 is at least one, and when the number of the exhaust holes 30 is plural, the plurality of the exhaust holes 30 are evenly arranged on the sealing sheet 20.
  • the number of the exhaust holes 30 in this embodiment is two, and the two exhaust holes 30 are disposed on two opposite sides of the center line on the sealing sheet 20, that is, the two exhaust holes 30 are along the recesses.
  • the cavity 11 is arranged symmetrically.
  • the number of the exhaust holes 30 may be a plurality, and the plurality of exhaust holes may be evenly spaced along the circumferential direction of the sealing sheet 20.
  • the slider body is provided with a groove 12 for cooperating with the sealing sheet 20 at a position on the open side of the cavity 11, and the sealing sheet 20 is correspondingly provided on the groove 12 of the slider body 10.
  • the groove 12 is provided along the outer periphery of the opening of the recessed cavity 11 to facilitate the embedding of the sealing sheet 20 and make the sealing sheet 20 and the slider body 10 fit more tightly. It should be noted that, the sealing sheet 20 is fixed on the slider body 10 through the concave-convex fitting limit between the sealing sheet 20 and the groove 12.
  • the structure and principle of this embodiment are similar to those of Embodiment 1, except that the exhaust hole 30 is provided on the slider body 10 and penetrates the slider. In the block body 10, one end port of the exhaust hole 30 is in communication with the sealing contact surface 21. Therefore, when the refrigerant enters the position of the sealing contact surface 21, the refrigerant can be discharged through the exhaust hole 30 on the slider body 10 to prevent the refrigerant from damaging the seal between the sealing sheet 20 and the slider body 10.
  • the center line of the exhaust hole 30 in this embodiment is disposed perpendicular to the plane where the sealing contact surface 21 is located, so that the exhaust hole 30 can be exhausted quickly and the process is simple.
  • the exhaust hole 30 may be disposed at an angle with the sealing contact surface 21, and only needs to ensure that it communicates with the sealing contact surface 21 and penetrates the slider body 10, so that the refrigerant can pass through the exhaust The hole 30 smoothly exits the slider body 10.
  • the number of the exhaust holes 30 is at least one, and when the number of the exhaust holes 30 is plural, the plurality of exhaust holes 30 are evenly arranged on the slider body 10.
  • the number of the exhaust holes 30 in this embodiment is two, and the two exhaust holes 30 are disposed on two opposite sides of the center line on the slider body 10.
  • the number of the exhaust holes 30 may be a plurality, and the plurality of exhaust holes may be evenly spaced along the circumferential direction of the slider body 10.
  • Embodiments 1 and 2 The structure and principle of this embodiment are similar to those described in Embodiments 1 and 2. The difference is that in this embodiment, the slider body 10 and the sealing sheet 20 are provided with a pair of the sealing sheet 20 and the slider body.
  • the exhaust hole 30 for exhausting at the sealed contact surface 10 of 10 further ensures the exhaust effect and prolongs the service life of the slider.
  • the slider provided by the present invention further includes a support pin 40 that extends across the cavity 11 on the slider body 10 and is connected to the slider body 10.
  • the structural strength of the slider body 10 is strengthened by the supporting pin 40, so that the slider body 10 is not easily deformed.
  • the supporting pin 40 is a metal supporting pin with high strength, and is connected to the slider body 10 through a fitting manner of a slot to facilitate disassembly and assembly.
  • the supporting pin 40 straddles the width direction of the cavity 11 and is disposed on the axis of symmetry of the cavity 11.
  • the support pin 40 of this embodiment includes a support pin top 41 provided adjacent to the bottom of the cavity 11 on the slider body 10, a support pin bottom 42 provided opposite to the support pin top 41, and used to connect the support pin 40.
  • the end surfaces of 41 are arc-shaped structures, and the end surfaces of the two pin side portions 43 are both planar structures.
  • the support pins are semi-circular or circular.
  • the support pin 40 on the slider of this embodiment has a planar structure because the end surfaces of the two support pin side portions 43 on the support pin 40 are planar. This prevents the support pin 40 from being flipped during installation and improves the efficiency of the support pin installation.
  • the end surface of the support pin top 41 on the support pin 40 of this embodiment is an arc structure, that is, the support pin top 41 is an arc surface, and the support pin top 41 is near the bottom of the cavity 11 and the fluid is in the cavity.
  • the convex direction of the arc surface of the support pin top 41 in this embodiment is a direction close to the bottom of the cavity 11.
  • the support pin top portion 41 and the two support pin side portions 43 are smoothly connected by a circular arc surface 44.
  • the traditional support pins are semi-circular, including semi-circular faces and planes, and the joints between the semi-circular faces and planes have sharp corners, which not only risks the risk of scratching your fingers during installation, but is not conducive to installation. It is not conducive to fluid drainage and easily leads to fluid diversion.
  • the supporting pin side portion 43 and the arc-shaped supporting pin top 41 connected smoothly by the arc surface 44 not only ensure safety during installation and are easy to install, but also the arc surface 44 also serves as a drainage arc surface. Effectively reduce flow resistance, reduce turbulence and turbulence, and significantly increase the flow coefficient of the four-way valve.
  • the end surface of the support pin bottom portion 42 in this embodiment is a flat structure, and the support pin bottom portion 42 and the two support pin side portions 43 are smoothly connected by a circular arc surface 44. Further reduce flow resistance, reduce turbulence and turbulence, and ensure safety during installation.
  • the end surface of the supporting pin bottom portion 42 in this embodiment may also be an arc surface, and the convex direction of the arc surface is a direction away from the supporting pin top portion 41. Since the support pin bottom 42 is a side far from the bottom of the cavity 11, the side where the support pin bottom 42 is located does not need to drain the fluid, so in this embodiment, the support pin bottom 42 is set to be away from the support pin top 41.
  • the convex arc surface in the direction prevents fluid from flowing to the side where the support pin bottom 42 is located, reducing turbulence and turbulence.
  • the bottom 42 of the stay pin and the side 43 of the stay pin are both smoothly connected through the arc surface 44 to further reduce the flow resistance, conduct drainage, and ensure installation safety.
  • the end face of the bottom 42 of the support pin in this embodiment includes a flat section 421 and an arc section 422.
  • the cross section of the supporting pin bottom portion 42 in this embodiment includes two sections of a planar section 421 and a section of an arc surface 422, and the two sections of the planar section 421 are respectively connected to two supporting pin side sections 43.
  • the arc-surface segment 422 is disposed between the two plane-surface segments 421 and connects the two plane-surface segments 421, and the convex direction of the arc-surface segment 422 is away from the support pin top 41.
  • the middle position of the supporting pin bottom 42 is set to be away from the center.
  • the convex arc surface in the direction of the support pin top 41 prevents fluid from flowing to the middle position of the support pin bottom 42 and reduces turbulence and turbulence.
  • the arrangement of the two plane sections 421 facilitates the installation of the support pin 20.
  • the two planar sections 421 and the two supporting pin side sections 43 are connected smoothly through the arc surface 44 to further reduce the flow resistance, conduct drainage, and ensure installation safety.
  • This embodiment also claims protection of a directional valve, which includes a slider as described in any one of the above embodiments.
  • the reversing valve claimed in the present invention is a four-way valve used for reversing the refrigerant in an air-conditioning refrigeration system, and the slider in this embodiment cooperates with the valve seat of the four-way valve to drive The valve seat moves back and forth relative to the valve body to switch the flow direction of the refrigerant.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sliding Valves (AREA)

Abstract

一种换向阀及其滑块，其中滑块包括具有凹腔（11）的滑块本体（10），及设于所述滑块本体上凹腔开口侧的密封片（20），所述密封片贴合在所述滑块本体上，并形成有密封接触面（21）；其中所述密封片和/或所述滑块本体上开设有排气孔（30），所述排气孔的一端开口设置在所述密封接触面所在的位置处。该滑块通过在密封片和/或滑块本体上设置排气孔，从而在耐冷媒实验中，冷媒进入滑块内后，可以通过排气孔排出，从而冷媒不会破坏密封片与滑块本体的密封接触面，滑块本体与密封片仍能紧密贴合，避免了密封片剥离滑块本体，滑块不失效，延长了滑块的使用寿命，维护成本也随之降低。

Description

换向阀及其滑块 技术领域
本发明涉及四通阀上冷媒换向技术领域，特别是涉及换向阀及其滑块。
背景技术
换向阀主要用于改变冷媒的流向从而切换制冷模式和制热模式。换向阀通常包括阀座，可滑动地设置在阀座上且能够对阀座上冷媒通道进行选择性封堵的滑块，其中滑块上设有密封片，用于对阀座与滑块进行接触密封。换向阀工作时，用滑块对阀座上冷媒通道进行封堵，此时冷媒进入至滑块内，而进入至滑块内冷媒具有一定的压力，会侵入至滑块与密封片之间的间隙，易导致密封片剥离滑块，从而使得滑块失效，进而导致整个换向阀失效，影响换向阀的切换效果。
发明内容
基于此，有必要针对滑块的密封片剥离滑块本体，从而使得滑块失效，进而导致整个换向阀失效，影响换向阀的切换效果问题，提供一种换向阀及其滑块。
一种滑块，包括：具有凹腔的滑块本体，及设于所述滑块本体上凹腔开口侧的密封片，所述密封片贴合在所述滑块本体上，并在所述密封片与所述滑块本体形成密封接触面；其中所述密封片和/或所述滑块本体上开设有排气孔，所述排气孔的一端开口延伸至所述密封接触面。
进一步地,所述排气孔设于所述密封片上且贯穿所述密封片。
进一步地,所述排气孔的中心线垂直于所述密封接触面所在的平面。
进一步地,所述排气孔的数量为至少一个，且当所述排气孔的数量为多个时，多个所述排气孔均匀地排布在所述密封片上。
进一步地,所述排气孔的数量为两个，两个所述排气孔设置在所述密封片上中心线的两相对侧。
进一步地,所述排气孔设于所述滑块本体上且贯穿所述滑块本体。
进一步地,所述排气孔的中心线垂直于所述密封接触面所在的平面。
进一步地,所述排气孔的数量为至少一个，且当所述排气孔的数量为多个时，多个所述排气孔均匀地排布在所述滑块本体上。
进一步地,所述排气孔的数量为两个，两个所述排气孔设置在所述滑块本体上中心线的两相对侧。
进一步地,所述密封片和所述滑块本体上分别开设有排气孔。
进一步地,所述密封片上的排气孔与所述滑块本体上的排气孔连通。
进一步地,所述滑块本体在凹腔开口侧的位置处开设有用于与所述密封片配合的凹槽，所述密封片对应地设置在所述滑块本体的凹槽上。
进一步地,所述密封片通过所述密封片与凹槽之间的凹凸配合限位固定在所述滑块本体上。
进一步地,所述滑块还包括撑销，所述撑销横跨在所述滑块本体上凹腔的开口侧，并与所述滑块本体连接固定。
进一步地,所述撑销包括撑销顶部，相对所述撑销顶部设置的撑销底部，以及用于连接所述撑销顶部和所述撑销底部且相对设置的两个撑销侧部；两个所述撑销侧部分别靠近所述凹腔两相对侧壁设置；所述撑销顶部的端面设为弧形状结构，两个所述撑销侧部的端面均设为平面状结构。
进一步地,所述撑销顶部与两个所述撑销侧部之间均通过圆弧面平滑过渡连接。
进一步地,所述撑销底部的端面设为平面状结构。
进一步地,所述撑销底部的端面为弧面，且所述弧面的凸起方向为远离所述撑销顶部的方向。
进一步地,所述撑销底部与两个所述撑销侧部均通过圆弧面平滑过渡连接。
进一步地,所述撑销底部的端面包括平面段和弧面段。
进一步地,所述撑销底部的端面包括两段平面段和一段弧面段，两段所述平面段与两个所述撑销侧部一一对应并连接，所述弧面段设于两段平面段之间的位置处，且所述弧面段的凸起方向为远离所述撑销顶部的方向。
进一步地,两段所述平面段分别与两个所述撑销侧部通过圆弧面平滑过渡连接。
本技术方案还提供一种换向阀，包括滑块，所述滑块为上任一所述的滑块。
由于上述技术方案的运用，本发明与现有技术相比具有下列优点：
本发明所提供的换向阀及其滑块，通过滑块上排气孔的结构设置，使得滑块应用在换向阀上使用时，冷媒进入至滑块本体与密封片之间的密封接触面时，可通过排气孔向外排出，以此确保密封片与滑块本体之间连接的稳定性，防止密封片从滑块本体上脱离的作用，进而起到保障滑块在换向阀上使用的有效性，具有延长使用寿命的作用。
附图说明
图1为本发明的实施例1所述的滑块的结构示意图；
图2为图1的仰视图；
图3为本发明的实施例2所述的滑块的结构示意图；
图4为图3的俯视图；
图5为本发明所述的撑销的截面示意图；
图6为本发明所述的撑销的截面示意图；
图7本发明所述的撑销的截面示意图。
10、滑块本体；11、凹腔；12、凹槽；20、密封片；21、密封接触面；30、排气孔；40、撑销；41、撑销顶部；42、撑销底部；421、平面段；422、弧面段；43、撑销侧部；44、圆弧面。
具体实施方式
为使本发明的目的、技术方案及优点更加清楚明白，以下结合附图及具体实施方式，对本发明进行进一步的详细说明。应当理解的是，此处所描述的具体实施方式仅用以解释本发明，并不限定本发明的保护范围。
如图1至图4所示本发明所提供的一种滑块，包括：具有凹腔11的滑块本体10，以及设于所述滑块本体10上凹腔11的开口侧的密封片20。其中所述密封片20贴合在所述滑块本体10上，并形成有密封接触面21；所述密封片20和/或所述滑块本体10上开设有排气孔30，所述排气孔30的一端开口延伸至所述密封接触面21，也就是说，所述排气孔30的一端开口设置在所述密封接触面21所在的位置处。
传统的换向阀中，冷媒会破坏密封片20与滑块本体10的密封接触面21，迫使密封片20剥离滑块本体10，导致滑块失效不能使用，而本实施方式的滑块通过在密封片20或滑块本体10上设置排气孔30，从而在耐冷媒实验中，冷媒侵入滑块本体10与密封片20的密封接触面后，可以通过排气孔30排出，从而 冷媒不会破坏密封片20与滑块本体10的密封接触面21，滑块本体10与密封片20仍能紧密贴合，避免了密封片20剥离滑块本体10，滑块不失效，延长了滑块的使用寿命，维护成本也随之降低。
实施例1
如图1至图2所示，所述排气孔30设于所述密封片20上且贯穿所述密封片20，所述排气孔30的一端端口与所述密封接触面21连通，从而当冷媒进入至密封接触面21所在位置时，可由与所述密封接触面21连通的排气孔30排出，避免冷媒破坏密封片20与滑块本体10的密封性。
本实施方式所述排气孔30的中心线垂直于所述密封接触面21所在的平面，使得排气孔30的排气快且工艺简单。在其他实施方式中，所述排气孔30可与所述密封接触面21呈角度设置，只需保证与密封接触面21连通并贯穿所述密封片20即可，使冷媒能通过排气孔30顺利排出密封片20外。
所述排气孔30的数量为至少一个，且当所述排气孔30的数量为多个时，多个所述排气孔30均匀地排布在所述密封片20上。本实施方式的排气孔30的数量为两个，两个所述排气孔30设置在所述密封片20上中心线的两相对侧，即两个所述排气孔30沿所述凹腔11对称设置。在其他实施方式中，所述排气孔30的数量可为多个，多个所述排气孔沿所述密封片20的周长方向均匀间隔设置。
所述滑块本体在凹腔11开口侧的位置处开设有用于与所述密封片20配合的凹槽12，所述密封片20对应地设置在所述滑块本体10的凹槽12上。所述凹槽12沿所述凹腔11的开口外周设置，方便密封片20嵌入，使密封片20与滑块本体10贴合更紧密。需要说明的是，所述密封片20通过所述密封片20与凹槽12之间的凹凸配合限位固定在所述滑块本体10上。
实施例2
如图3至图4所示，本实施方式与实施例1所述的结构和原理相似，区别在于，本实施方式所述排气孔30设于所述滑块本体10上且贯穿所述滑块本体10，所述排气孔30的一端端口与所述密封接触面21连通。从而当冷媒侵入至密封接触面21所在位置时，可由所述滑块本体10上的排气孔30排出，避免冷媒破坏密封片20与滑块本体10的密封性。
本实施方式所述排气孔30的中心线垂直于所述密封接触面21所在的平面设置，使得排气孔30排气快且工艺简单。在其他实施方式中，所述排气孔30可与所述密封接触面21呈角度设置，只需保证与密封接触面21连通并贯穿所述滑块本体10即可，使冷媒能通过排气孔30顺利排出滑块本体10外。
所述排气孔30的数量为至少一个，且当所述排气孔30的数量为多个时，多个所述排气孔30均匀地排布在所述滑块本体10上。本实施方式的排气孔30的数量为两个，两个所述排气孔30设置在所述滑块本体10上中心线的两相对侧。在其他实施方式中，所述排气孔30的数量可为多个，多个所述排气孔沿所述滑块本体10的外围周长方向均匀间隔设置。
实施例3
本实施方式与实施例1与实施例2所述的结构和原理相似，区别在于，本实施方式在滑块本体10以及密封片20上均设置有对所述密封片20与所述滑块本体10的密封接触面21处进行排气的排气孔30，更进一步地保证了排气效果，延长了滑块的使用寿命。
本发明所提供的滑块还包括横跨所述滑块本体10上凹腔11开口并与所述滑块本体10连接的撑销40。以用所述撑销40加强了滑块本体10的结构强度，使滑块本体10不易变形。其中，所述撑销40采用金属撑销，强度高；并通过 卡槽配合的方式与所述滑块本体10连接，方便拆装。本实施方式所述撑销40横跨所述凹腔11的宽度方向并设于所述凹腔11的对称轴上。
具体地，本实施方式的撑销40包括邻近所述滑块本体10上凹腔11底部设置的撑销顶部41，相对所述撑销顶部41设置的撑销底部42，以及用于连接所述撑销顶部41和所述撑销底部42且相对设置的两个撑销侧部43；两个所述撑销侧部43分别靠近所述凹腔11两相对侧壁设置；所述撑销顶部41的端面设为弧形状结构，两个所述撑销侧部43的端面均设为平面状结构。
传统的滑块中，撑销为半圆形或圆形，当撑销安装时，存在易于翻转的现象。本实施方式的滑块上的撑销40，由于所述撑销40上两个撑销侧部43的端面为平面状结构，以此防止撑销40安装时的翻转，提高撑销的安装效率。另外，本实施方式的撑销40上撑销顶部41的端面设为弧形状结构，即所述撑销顶部41为弧面，且撑销顶部41靠近凹腔11底部所在侧，流体在凹腔11内流动，呈弧形的撑销顶部41利于流体引流，减少紊流、乱流现象。本实施方式所述撑销顶部41的弧面凸起方向为靠近所述凹腔11底部的方向。
所述撑销顶部41与两个所述撑销侧部43之间均通过圆弧面44平滑过渡连接。传统的撑销为半圆形，包含半圆形面和平面，且半圆形面和平面的连接处为尖角，不仅在安装时存在划伤手指的风险，不利于安装，且尖角处不利于流体引流，易导致流体分流的情况。而本实施方式通过圆弧面44平滑过渡连接的撑销侧部43和弧面型的撑销顶部41，不仅在安装时保证安全，易于安装，且圆弧面44同样作为引流弧面，可有效降低流阻，减少紊流、乱流现象，显著提升四通阀的流量系数。
如图5所示，本实施方式上所述撑销底部42的端面为平面状结构，且所述撑销底部42与两个所述撑销侧部43均通过圆弧面44平滑过渡连接，进一步降 低流阻，减少紊流、乱流现象，并保证安装时的安全。
如图6所示，本实施方式上所述撑销底部42的端面还可以设为弧面，且所述弧面的凸起方向为远离所述撑销顶部41的方向。由于所述撑销底部42为远离凹腔11底部的一侧，故撑销底部42所在侧无需对流体进行引流，从而本实施方式将撑销底部42设置为向远离所述撑销顶部41的方向凸起的弧面，防止流体流至撑销底部42所在侧，减少紊流、乱流现象。
同理，所述撑销底部42与所述撑销侧部43均通过圆弧面44平滑过渡连接，进一步降低流阻，进行引流，并保证安装安全。
如图7所示，本实施方式上所述撑销底部42的端面包括平面段421和弧面段422。进一步地，本实施方式中所述撑销底部42的截面包括两段平面段421和一段弧面段422，两段所述平面段421分别与两个所述撑销侧部43连接，所述弧面段422设于两段平面段421之间并连接两平面段421，且所述弧面段422的凸起方向为远离所述撑销顶部41的方向。同理，由于所示撑销底部42为远离凹腔11底部的一侧，故撑销底部42所在侧无需对流体进行引流，从而本实施方式将撑销底部42的中间位置设置为向远离所述撑销顶部41的方向凸起的弧面，防止流体流至撑销底部42的中间位置，减少紊流、乱流现象。且两平面段421的设置，方便了撑销20的安装。
同理，两段所述平面段421分别与两个所述撑销侧部43通过圆弧面44平滑过渡连接，以进一步降低流阻，进行引流，并保证安装安全。
本实施方式还请求保护一种换向阀，所述换向阀包括如上任一实施例所述的滑块。需要说明的是，本发明请求保护的换向阀为应用于空调制冷系统上用于冷媒换向的四通阀，且本实施方式所述滑块与所述四通阀的阀座配合，带动阀座相对于阀体来回移动实现冷媒流动方向的切换。
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发明的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对发明专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本发明构思的前提下，还可以做出若干变形和改进，这些都属于本发明的保护范围。因此，本发明专利的保护范围应以所附权利要求为准。

Claims (23)

  1. 一种滑块，其特征在于，包括：具有凹腔的滑块本体，及设于所述滑块本体上凹腔开口侧的密封片，所述密封片贴合在所述滑块本体上，并在所述密封片与所述滑块本体形成密封接触面；其中所述密封片和/或所述滑块本体上开设有排气孔，所述排气孔的一端开口延伸至所述密封接触面。
  2. 根据权利要求1所述的滑块，其特征在于，所述排气孔设于所述密封片上且贯穿所述密封片。
  3. 根据权利要求2所述的滑块，其特征在于，所述排气孔的中心线垂直于所述密封接触面所在的平面。
  4. 根据权利要求2所述的滑块，其特征在于，所述排气孔的数量为至少一个，且当所述排气孔的数量为多个时，多个所述排气孔均匀地排布在所述密封片上。
  5. 根据权利要求4所述的滑块，其特征在于：所述排气孔的数量为两个，两个所述排气孔设置在所述密封片上中心线的两相对侧。
  6. 根据权利要求1所述的滑块，其特征在于，所述排气孔设于所述滑块本体上且贯穿所述滑块本体。
  7. 根据权利要求6所述的滑块，其特征在于，所述排气孔的中心线垂直于所述密封接触面所在的平面。
  8. 根据权利要求5所述的滑块，其特征在于，所述排气孔的数量为至少一个，且当所述排气孔的数量为多个时，多个所述排气孔均匀地排布在所述滑块本体上。
  9. 根据权利要求8所述的滑块，其特征在于，所述排气孔的数量为两个，两个所述排气孔设置在所述滑块本体上中心线的两相对侧。
  10. 根据权利要求1所述的滑块，其特征在于，所述密封片和所述滑块本 体上分别开设有排气孔。
  11. 根据权利要求10所述的滑块，其特征在于，所述密封片上的排气孔与所述滑块本体上的排气孔连通。
  12. 根据权利要求1述的滑块，其特征在于，所述滑块本体在凹腔开口侧的位置处开设有用于与所述密封片配合的凹槽，所述密封片对应地设置在所述滑块本体的凹槽上。
  13. 根据权利要求12所述的滑块，其特征在于，所述密封片通过所述密封片与凹槽之间的凹凸配合限位固定在所述滑块本体上。
  14. 根据权利要求1所述的滑块，其特征在于，所述滑块还包括撑销，所述撑销横跨在所述滑块本体上凹腔的开口侧，并与所述滑块本体连接固定。
  15. 根据权利要求14所述的滑块，其特征在于，所述撑销包括撑销顶部，相对所述撑销顶部设置的撑销底部，以及用于连接所述撑销顶部和所述撑销底部且相对设置的两个撑销侧部；两个所述撑销侧部分别靠近所述凹腔两相对侧壁设置；所述撑销顶部的端面设为弧形状结构，两个所述撑销侧部的端面均设为平面状结构。
  16. 根据权利要求15所述的滑块，其特征在于，所述撑销顶部与两个所述撑销侧部之间均通过圆弧面平滑过渡连接。
  17. 根据权利要求15或16所述的滑块，其特征在于，所述撑销底部的端面设为平面状结构。
  18. 根据权利要求15或16所述的滑块，其特征在于，所述撑销底部的端面为弧面，且所述弧面的凸起方向为远离所述撑销顶部的方向。
  19. 根据权利要求18所述的滑块，其特征在于，所述撑销底部与两个所述撑销侧部均通过圆弧面平滑过渡连接。
  20. 根据权利要求15或16所述的滑块，其特征在于，所述撑销底部的端面包括平面段和弧面段。
  21. 根据权利要求20所述的滑块，其特征在于，所述撑销底部的端面包括两段平面段和一段弧面段，两段所述平面段与两个所述撑销侧部一一对应并连接，所述弧面段设于两段平面段之间的位置处，且所述弧面段的凸起方向为远离所述撑销顶部的方向。
  22. 根据权利要求21所述的滑块，其特征在于，两段所述平面段分别与两个所述撑销侧部通过圆弧面平滑过渡连接。
  23. 一种换向阀，包括滑块，其特征在于，所述滑块为权利要求1-22中任一项所述的滑块。
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CN209146369U (zh) * 2018-09-10 2019-07-23 浙江盾安禾田金属有限公司 换向阀及其滑块
CN209146388U (zh) * 2018-09-11 2019-07-23 浙江盾安禾田金属有限公司 四通阀及其滑块
CN209196240U (zh) * 2018-11-19 2019-08-02 浙江盾安禾田金属有限公司 电磁四通阀滑块及其电磁四通阀

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