WO2012135985A1 - 一种空调用短管节流阀 - Google Patents

一种空调用短管节流阀 Download PDF

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Publication number
WO2012135985A1
WO2012135985A1 PCT/CN2011/001136 CN2011001136W WO2012135985A1 WO 2012135985 A1 WO2012135985 A1 WO 2012135985A1 CN 2011001136 W CN2011001136 W CN 2011001136W WO 2012135985 A1 WO2012135985 A1 WO 2012135985A1
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WIPO (PCT)
Prior art keywords
valve
valve core
transition
valve body
core
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PCT/CN2011/001136
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English (en)
French (fr)
Inventor
金仁召
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宁波奥柯汽车空调有限公司
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Publication of WO2012135985A1 publication Critical patent/WO2012135985A1/zh

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Classifications

    • 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
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/38—Expansion means; Dispositions thereof specially adapted for reversible cycles, e.g. bidirectional expansion restrictors

Definitions

  • the invention belongs to the technical field of air conditioners, and particularly relates to a short tube throttle valve for air conditioning. Background technique
  • the throttle structure in the existing small air-conditioning equipment such as household air conditioners generally adopts a throttle valve or a throttle block structure.
  • a Chinese utility model patent "Throttle Valve” whose patent number is ZL97236534.6 (publication number CN2295085Y) is disclosed.
  • a throttle valve is characterized in that: two opposite valves A and B are fixed in the housing, a:
  • the valve A includes a valve body with a gasket at the end, and a through hole is formed in the middle of the valve body, which is large
  • the aperture portion has a valve core, the central portion of the valve core is provided with a spray hole, and a filter screen is connected to one end of the valve body opposite to the inlet and the outlet;
  • the valve B includes a valve body with a gasket at the end, and the central portion of the wide body is opened
  • the through hole has a valve core in a large aperture portion, and a spray hole is formed in a middle portion of the valve core, and a filter mesh is connected to one end of the valve body opposite to the inlet and the outlet.
  • a Chinese utility model patent "two-way secondary throttle valve" with patent number ZL200720107950.X (announcement number CN201027999Y) discloses such a throttle valve, including a valve body, and a valve seat and a valve are sealed and fixed at one end of the valve body.
  • the seat includes a valve hole and a slideway.
  • the slide has a movable valve core, the valve core has an axial small hole, the valve seat is provided with a plurality of through holes, and the other end of the valve body is sealed and fixed.
  • Fixed spool with fixed spool with small axial holes The internal structure of the valve body in the above two throttle valves is complicated and high in cost.
  • Another Chinese utility model patent entitled "Orifice-type throttling and splitting throttling device" with the patent number ZL03247899.2 discloses a throttling device, including a tube shell, a main orifice plate, Auxiliary orifice plate, baffle plate.
  • the main orifice plate is fixed at one end of the shell
  • the baffle plate is fixed at the other end of the shell
  • the auxiliary orifice plate is installed in the shell and placed between the main orifice plate and the baffle plate
  • the auxiliary orifice plate can be fluid with the two ends of the shell The pressure difference changes and moves.
  • the structure of the throttling device is relatively simple.
  • the fluid passage of the outer ring of the auxiliary orifice plate (corresponding to the movable valve core) in the throttle device is a fluid main passage, and the fluid passing through the fluid main passage flows through the fluid through hole on the baffle, which needs to be placed at the placement portion.
  • the rear part excavates a path that forms an upward flow for the fluid passing through the fluid passage, so the structure of the auxiliary orifice plate is relatively complicated.
  • the various small-sized throttle devices for air conditioners have at least one static valve core (also called a main orifice plate or a valve seat) that is completely stationary with respect to the casing, and the static valve core has a capillary hole penetrating its axial center. Therefore, when the refrigerant flows in the reverse direction, the interaction force between the movable wide core and the static valve core will rapidly increase the thrust of the movable valve core, and there is no equilibrium transition phase. After many experiments, this is not satisfactory.
  • the matching throttling strength required for household air conditioning cooling or heating, so the throttling effect of various existing throttle tubes can be further improved.
  • the technical problem to be solved by the present invention is to provide a short-tube throttle valve for air conditioner movement which is more stable when the refrigerant is reversing and flowing, which can improve the throttle effect on the air conditioner as a whole. .
  • a short tube throttle valve for an air conditioner comprising a tubular valve body, wherein a first movable valve core capable of axially sliding relative to a wide body is disposed in the body.
  • the first moving valve core has a first capillary hole extending through the axial center thereof, and at least two first overflow passages distributed around the first capillary hole and axially extending, wherein the valve body is further provided There is a transition valve core having only a capillary passage extending through its axis and a first blocking member having a first passage through which the refrigerant passes, the first blocking member being fixedly disposed opposite to the valve body, the first movable valve
  • the core is located between the transition spool and the first blocking member, the intermediate portion of the transition spool has an annular recess, and the valve body has an inner annular annular portion, and the annular stop is located in the annular recess of the transition spool So that the transition spool can only slide axially within a certain range.
  • the first overflow passage is a through hole that penetrates the first movable valve core in the axial direction. It may also be a groove provided on the peripheral wall of the first movable valve core and axially penetrating therethrough. It is more convenient to process the first overflow passage on the peripheral wall of the first movable valve core.
  • the first filter net and the second filter net are respectively disposed at two ends of the valve body, and the first filter net and the second filter net are relatively fixed to the valve body.
  • the filter can filter the impurities in the refrigerant to make the refrigerant passing through the moving valve core and the transition valve core more pure and enhance the cooling effect.
  • the valve body is further provided with a second movable valve core and a second blocking member, the second movable wide core is located between the transition valve core and the second blocking member, and the second movable valve core has only one through the axial center thereof
  • the second capillary, the second blocking member has a first passage through which the refrigerant passes. Due to the addition of the second moving valve core, the entire throttle valve adopts two movable wide core structures, so the throttle valve has two dynamic throttling processes during the working process, and the throttling effect is good.
  • Each of the blocking members is a retaining ring, and the capillary holes and the overflow holes on the movable valve core are in communication with the passage in the middle of the retaining ring when the retaining ring is in contact with the movable valve core. Since the outer peripheral surface of the blocking member of the retaining ring and the peripheral surface of the valve body are smooth surfaces, it is preferable that the outer peripheral surface of the retaining ring and the inner wall of the valve body are fixed together by extrusion, and the extruded The method has the advantage of simple positioning.
  • the following extrusion method may be adopted, in which an annular groove is respectively provided on the outer peripheral surface of each blocking member, and then a force is applied to the outside of the valve body, and the inner wall of the valve body is clamped into the annular groove by pressing. This allows the valve body to be firmly coupled to the retaining ring.
  • Each of the blocking members is a convex ring formed on the inner wall of the valve body.
  • the liner, the movable core, the annular stop, each filter and each blocking member and the inner wall of the wide body are further provided with a liner, and the outer peripheral surface of the liner and the inner wall of the liner are pressed Fixed together.
  • Increasing the liner structure can enhance the overall strength of the short tube throttle valve. Since the length of the liner is shorter than the length of the valve body, it is easier to install the transition spool, the movable valve core and the blocking member, and the liner can also be used for each filter. The installation serves as an indicator for easy assembly of the filter.
  • Each of the blocking members is a retaining ring, and one or more rings are respectively provided on the outer peripheral surfaces of the blocking members. a groove, the inner wall of the liner is snapped into the annular groove by pressing.
  • each of the blocking members can be a convex ring formed on the inner wall of the liner.
  • the invention has the advantages that: the throttle tube adopts a transition valve core instead of the static valve core, and the transition valve core can move axially within a certain range, so the axial direction of the movable wide core moves to the transition valve When the core is in contact, the transition spool has a certain displacement, which acts as a buffer to ensure a smooth transition of the refrigerant flow through the transition spool.
  • the test shows that the throttle of this structure can improve the throttling effect on the air conditioner as a whole.
  • Figure 1 is a cross-sectional view showing the structure of a first embodiment of the present invention
  • Figure 2 is a cross-sectional view taken along line A-A of Figure 1;
  • Figure 3 is a cross-sectional view taken along line B-B of Figure 1;
  • Figure 4 is a cross-sectional view showing the structure of a first movable valve core of another structural form according to a first embodiment of the present invention
  • Figure 5 is a cross-sectional view showing the structure of a second embodiment of the present invention
  • Figure 6 is a cross-sectional view showing the structure of a third embodiment of the present invention.
  • Figure 7 is a cross-sectional view showing the structure of a fourth embodiment of the present invention.
  • Figure 8 is a cross-sectional view showing the structure of a fifth embodiment of the present invention.
  • Figure 9 is a cross-sectional view showing the structure of a sixth embodiment of the present invention.
  • Figure 10 is a cross-sectional view showing the structure of a seventh embodiment of the present invention.
  • Figure 11 is a cross-sectional view showing the structure of an eighth embodiment of the present invention. detailed description
  • the utility model relates to a short pipe throttle valve for air conditioner, which comprises a tubular valve body 1 , a valve body 1 is generally a copper pipe, and of course, can also be made of aluminum or steel pipe, and the valve body is preferably a round tubular shape, and of course, can also be rectangular.
  • the inner diameter of the valve body 1 is ⁇ 5 to ⁇ 30 ⁇ .
  • the valve body 1 is provided with a first movable valve element 2 which is axially slidable relative to the valve body 1.
  • the first movable valve element 2 has a first capillary hole 21 extending through its axial center, and at least two are distributed in the first
  • the first overflow passage 22 around the capillary hole 21 and axially extending is preferably the four first overflow passages 22, and the first overflow passage 22 in the embodiment is disposed on the peripheral wall of the first movable valve core 2.
  • the groove is formed by the upper and the axial direction, and the groove is preferably a semi-circular groove.
  • first overflow passage 22 can also be four through holes extending through the first movable wide core 2 in the axial direction.
  • the first overflow passage 22 has a circular cross section, and the circular orifice overflow passage is relatively easy. machining.
  • the cross section can also be a circular hole, a square hole, a triangular hole, a polygonal hole, a waist hole or a crescent hole as shown.
  • the valve body 1 is further provided with a transition valve core 3 having only a capillary passage 31 extending through its axis and having refrigeration
  • the first blocking member 4 of the first passage 41 through which the agent passes is fixedly disposed opposite to the valve body 1.
  • the first blocking member 4 is a convex ring formed on the inner wall of the valve body 1 by extrusion. .
  • the first movable valve core 2 is located between the transition spool 3 and the first blocking member 4, the spacing between the transition spool 3 and the first blocking member 4 is greater than the axial dimension of the first movable spool 2, and the transition spool 3
  • the middle portion of the outer circumference has an annular recess 32
  • the valve body 1 has an inner annular annular portion 11 which is an annular convex ring formed by extrusion on the inner surface of the valve body 1.
  • the annular stop portion 11 is located at the transition.
  • the annular recess 32 of the valve core is disposed in the annular recess 32 and is aligned with the side wall of the annular recess 32 so that the transition spool 3 can only axially slide within a certain range.
  • the annular block The portion 11 is in contact with the left inner wall of the annular recess 32, and when the transition spool 3 is moved to the extreme position to the left, the annular stopper 11 is in contact with the right inner wall of the annular recess 32.
  • the first capillary hole 21 on the first movable valve element 2 and the capillary passage 31 on the transition valve body 3 have a diameter of ⁇ 0.5 to ⁇ 3 ⁇ . According to experiments, when the pore diameter of the capillary is less than 0.5 mm, the refrigerant can hardly pass through the capillary. When the pore diameter of the capillary is larger than 3 mm, the capillary can not be throttled. Therefore, the first capillary is described above.
  • the aperture of the channel 21 and the capillary channel 31 is ⁇ 0.5 ⁇ 3 ⁇ . In the range where the capillary is small, the throttle effect is better.
  • the slip energy of the first movable valve element 2 is in contact with the transition valve core 3.
  • the first movable valve element 2 and the transition valve core 3 are in planar contact fit, and the planar contact fit can simplify the first movable valve core 2 And the structure of the transition spool 3.
  • the first movable spool 2 and the transition spool 3 may also be tapered.
  • the first filter net 5 and the second filter net 6 are respectively disposed at both ends of the wide body 1, and the first filter net 5 and the second filter net 6 are fixed to the valve body 1 by extrusion.
  • the first blocking member 4, the first movable valve element 2 and the transition spool 3 are located between the first filter net 5 and the second filter net 6.
  • the throttle valve further includes a liner 9 made of a metal material, and the outer peripheral surface of the liner 9 and the inner wall of the valve body 1 are pressed. The manners are fixed together, and the first moving valve element 2, the transient moving valve element 3 and the first blocking member 4 are all disposed in the liner 9.
  • the first blocking member 4 is a convex ring formed on the inner wall of the liner 91 by extrusion.
  • the first movable core 2 in this embodiment can also adopt a movable valve core structure as shown in FIG. As shown in Fig. 6, it is a third embodiment of the present invention.
  • This embodiment differs from the first embodiment in that the first blocking member 4 is a retaining ring due to being the first blocking
  • the outer peripheral surface of the retaining ring of the member 4 and the peripheral surface of the valve body are both smooth surfaces. Therefore, the outer peripheral surface of the first blocking member 4 and the inner wall of the wide body 1 are fixed together by extrusion, and the following can be specifically used.
  • one or more annular grooves 42 are preliminarily provided on the outer peripheral surface of the first blocking member 4, and then the outside of the valve body 1 is biased to press the inner wall of the valve body 1 into the annular groove 2 by pressing. This allows the valve body 1 to be firmly coupled to the retaining ring as the first blocking member 4.
  • the first movable valve core in this embodiment can also adopt the movable valve core structure as shown in FIG. As shown in Fig. 7, it is a fourth embodiment of the present invention.
  • first blocking member 4 is a retaining ring, and since the outer peripheral surface of the retaining ring as the first blocking member 4 and the peripheral surface of the valve body are smooth surfaces, the first The outer peripheral surface of the blocking member 4 and the inner wall of the liner 9 are fixed together by extrusion.
  • the following extrusion method may be adopted, and one or more annular grooves 42 are previously provided on the outer circumferential surface of the first blocking member 4.
  • one or more annular grooves 42 are respectively provided on the outer peripheral surfaces of the first and second blocking members 5, 6, and then the outside of the valve body 1 is biased to the inner wall of the liner 9.
  • the sleeve 9 is firmly engaged with the first blocking member 4 by pressing, and the inner wall of the valve body 1 is also pressed against the outer wall of the liner 9.
  • the first movable valve element 2 in this embodiment can also adopt a movable valve core structure as shown in Fig. 4.
  • the working principles and processes of the foregoing four embodiments are basically the same, and the specific description is as follows:
  • the refrigerant flows in from the left end of the valve body 1, the refrigerant flows in through the first filter net 5 and the passage 41 of the first blocking member 4, and the first movable valve element 2 is moved right by the pressure difference, in the first movable valve core 2 During the movement, the refrigerant passes through the first capillary hole 21 on the first movable wide core 2 and each of the first overflow holes 22, while the refrigerant passing through the first movable wide core 2 also pushes the transition spool 3 to the right.
  • the left end surface of the transition spool 3 blocks the first overflow hole 22 on the first moving valve core 2, and the first capillary hole 21 on the first movable valve core 2 and the capillary hole of the transition wide core 3
  • the passage 31 communicates with the refrigerant, and the refrigerant can only pass through the first capillary hole 21 of the first movable valve core 2 and the capillary passage 31 of the transition valve core 3, and the refrigerant continues to flow to the right after passing through the transition core 3, and the second After the filter 6, the throttle valve flows out to realize the forward dynamic throttle.
  • valve body 1 is further provided with a second movable valve core 7 and a second block.
  • the second moving valve core 7 is located between the transition spool 3 and the second blocking member 8, and the spacing between the transition spool 3 and the second blocking member 8 is greater than the axial dimension of the second movable spool 7
  • the second blocking member 8 is fixedly disposed opposite to the valve body 1.
  • the second blocking member 8 is a convex ring formed on the inner wall of the valve body 1 by extrusion.
  • the second movable valve element 7 has only a second capillary hole 71 extending through its axis, and the second blocking member 8 has a second passage 81 through which the refrigerant passes.
  • the left end surface of the second movable valve element 7 is in contact with the right end surface of the transition valve body 3, and the second capillary hole 71 and the transition valve on the second movable valve element 7
  • the capillary passage 31 of the core 3 communicates; in the state where the second movable spool 7 is moved to the rightmost end, the right end surface of the second movable spool 7 is blocked by the second blocking member 8, and the second movable plunger 7 is second.
  • the capillary hole 71 communicates with the second passage 81 on the second blocking member 8. As shown in Fig. 9, it is a sixth embodiment of the present invention.
  • This embodiment differs from the fifth embodiment in that it further includes a liner 9, and the arrangement of the liner 9 is referred to in the second embodiment. As shown in Fig. 10, it is a seventh embodiment of the present invention.
  • first blocking member 4 and the second blocking member 8 are retaining rings, and the first blocking member 4 and the second blocking member 8 of the retaining ring structure are disposed in a manner Refer to Example 3. As shown in Fig. 11, it is an eighth embodiment of the present invention.
  • This embodiment differs from the seventh embodiment in that it further includes a liner 9, and the arrangement of the liner 9 is referred to in the fourth embodiment.
  • the working principles and processes of the foregoing fifth to eighth embodiments are basically the same, and the specific description is as follows:
  • the refrigerant flows from the left end of the wide body 1, the refrigerant flows in through the first filter 5 and the passage 41 of the first blocking member 4, and the first movable valve core 2 is moved right by the pressure difference, in the first movable valve core 2 During the movement, the refrigerant passes through the first capillary hole 21 on the first movable valve core 2 and each of the first overflow holes 22, while the refrigerant passing through the first movable valve core 2 also pushes the transitional wide core 3 to the right.
  • the left end surface of the transition spool 3 blocks the first overflow hole 22 on the first movable valve core 2, and the first capillary hole 21 on the first movable core 2 and the capillary hole of the transition spool 3
  • the passage 31 communicates, and the refrigerant can only pass through the first capillary hole 21 on the first movable valve core 2 and the capillary channel 31 of the transitional wide core 3 to realize the first dynamic throttling; after the refrigerant passes through the transition spool 3 Continue to flow to the right, the second moving valve core 7 is moved right by the pressure difference, and during the movement of the second moving valve core 7, the refrigerant Through the second capillary hole 71 on the second movable valve core

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Sliding Valves (AREA)

Description

一种空调用短管节流闽 技术领域
本发明属于空调的技术领域， 尤其涉及一种空调用短管节流阀。 背景技术
现有的家用空调等小型制冷设备中的节流结构一般采用节流阀或节流块结构，如一 专利号为 ZL97236534.6(公告号为 CN2295085Y)的中国实用新型专利 《节流阀》 披露了 一种节流阀， 其特征在于： 壳体内固定有两只相对的阀 A与阀 B， a: 阀 A包括一个端 部固定有垫片的阀体， 阀体中部开有通孔， 其大孔径部分有一个阀芯， 阀芯中部开有喷 孔， 在阀体上相对进出口的一端连接有滤网； b: 阀 B包括一个端部固定有垫片的阀体， 阔体中部开有通孔， 其大孔径部分有一个阀芯， 阀芯中部开有喷孔， 在阀体上相对进出 口的一端连接有滤网。
还如一专利号为 ZL200720107950.X(公告号为 CN201027999Y)的中国实用新型专利 《双向二次节流阀》 披露了这样一种节流阀， 包括阀体， 阀体内一端密封固定有阀座， 阀座包括阀孔和滑道， 滑道内设有可动的阀芯， 阀芯上带有轴向小孔， 阀座上设有若干 个通流孔， 所述的阀体内另一端密封固定有固定阀芯， 固定阀芯带有轴向小孔。 上述两 个节流阀中阀体内部的结构比较复杂， 成本高。
又有一专利号为 ZL03247899.2(公告号为 CN2639808Y)的中国实用新型专利 《一种 孔板型节流、 分流的节流装置》披露了一种节流装置， 包括管壳、 主孔板、 辅孔板、 档 板。 主孔板固定在管壳一端， 档板固定在管壳的另一端， 辅孔板装于管壳内并置于主孔 板与档板之间，辅孔板可随管壳内两端流体压差变化移动。当辅孔板移至主孔板一端时， 流体必须通过两孔板中心小孔节流； 当辅孔板移至档板一端时， 流体只通过主孔板中心 小孔节流。 该节流装置的结构相对简洁。 该节流装置中的辅孔板 (相当于动阀芯)外圈的 流体通道为流体主通道， 为使通过该流体主通道的流体流过挡板上的流体通孔， 其需要 在放置部后部挖去一块形成供通过流体通道的流体有一向上流动的路径， 因此该辅孔板 的结构比较复杂。
纵观现有各种空调用小型节流装置， 其至少具有一个相对管壳完全静止的静阀芯 (也叫主孔板或阀座)， 静阀芯上开有贯穿其轴心的毛细孔， 因此制冷剂在换向流动时， 在动阔芯和静阀芯之间的相互作用力对动阀芯的推力会迅速提高， 没有平衡过渡阶段， 经过多次试验得知， 这不利于满足家用空调制冷或制热时所需匹配的节流强度， 因此现 有的各种节流管的节流效果还可作进一步改进。
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确 认 本 发明内容
本发明所要解决的技术问题是针对上述现有技术现状而提供一种在制冷剂换向流 动时动阀芯移动更平稳的空调用短管节流阀， 能整体提高在空调上的节流效果。
本发明解决上述技术问题所采用的技术方案为： 一种空调用短管节流阀， 包括有呈 管状的阀体， 闽体内设有能相对阔体轴向滑移的第一动阀芯， 第一动阀芯具有一贯穿其 轴心的第一毛细孔， 及至少二个分布在该第一毛细孔周边且轴向贯穿的第一溢流通道， 其特征在于：所述阀体内还设有仅具有一贯穿其轴心的毛细孔通道的过渡阀芯及具有供 制冷剂通过的第一通道的第一阻挡件， 该第一阻挡件与阀体相对固定设置， 所述第一动 阀芯位于过渡阀芯和第一阻挡件之间， 所述过渡阀芯的外周中部具有环形凹部， 阀体内 具有内凸的环形挡部， 该环形挡部位于所述过渡阀芯的环形凹部内， 以使过渡阀芯只能 在一定范围内轴向滑移。
上述第一溢流通道为轴向贯穿第一动阀芯的通孔。也可以为设置在第一动阀芯周壁 上并轴向贯穿的凹槽。 将第一溢流通道设置在第一动阀芯周壁上更方便加工。
上述阀体内的两端还分别设置有第一过滤网和第二过滤网，所述第一过滤网和第二 过滤网与阀体相对固定。 设置过滤网能过滤掉制冷剂中的杂质， 使通过各动阀芯和过渡 阀芯的制冷剂更纯净， 增强制冷效果。
上述阀体内还设有第二动阀芯和第二阻挡件，所述第二动阔芯位于过渡阀芯和第二 阻挡件之间， 且第二动阀芯上仅具有一贯穿其轴心的第二毛细孔， 第二阻挡件具有供制 冷剂通过的第一通道。由于增设有第二动阀芯，因此整个节流阀采用了两个动阔芯结构， 故节流阀在工作过程中有两次动态节流的过程， 节流效果好。
上述各阻挡件均为挡圈， 在挡圈与动阀芯接触的状态下动阀芯上的毛细孔、 溢流孔 均与挡圈中部的通道相通。 由于釆用挡圈的阻挡件的外周面和阀体内周面均为光滑面， 因此， 上述的挡圈外周面与阀体内壁之间以通过挤压的方式固定在一起为佳， 挤压的方 式具有定位简单的优点。 具体可釆用如下挤压方式， 在各阻挡件外周面上分别预先设有 环形槽， 再于阀体外部施力， 将所述阀体的内壁通过挤压卡入所述的环形槽内， 这样可 使阀体与挡圈牢固结合。
上述各阻挡件均为在阀体内壁上形成内凸的凸环。 以凸环作为阻挡件可简化阻挡件 的结构。
上述过渡阀芯、 各动阔芯、 环形挡部、 各过滤网及各阻挡件与阔体内壁之间还设有 一衬管， 所述衬管外周面与阔体内壁之间通过挤压的方式固定在一起。 增加衬管结构能 增强该短管节流阀整体的强度， 由于衬管的长度比阀体的长度短， 更易安装过渡阀芯、 动阀芯和阻挡件， 同时衬管还可对各过滤网的安装起到指示作用， 便于组装过滤网。
上述各阻挡件均为挡圈，在所述各阻挡件的外周面上分别预先设有一条或多条环形 槽， 所述衬管的内壁通过挤压卡入所述的环形槽内。
同理， 增加衬管后的节流阔， 其内的各阻挡件可为在衬管内壁上形成内凸的凸环。 与现有技术相比， 本发明的优点在于： 本节流管采用过渡阀芯代替静阀芯， 过渡阀 芯能在一定范围内轴向移动， 因此在动阔芯轴向移动至与过渡阀芯接触时， 过渡阀芯有 一定位移， 起到缓冲作用， 确保通过过渡阀芯的制冷剂流量变化平稳过渡， 试验表明这 种结构的节流管能整体提高在空调上的节流效果。 附图说明
图 1为本发明第一个实施例的结构剖视图；
图 2为图 1的 A— A向剖视图；
图 3为图 1的 B—B向剖视图；
图 4为本发明第一个实施例的另一种结构形式的第一动阀芯结构剖视图； 图 5为本发明第二个实施例的结构剖视图；
图 6为本发明第三个实施例的结构剖视图；
图 7为本发明第四个实施例的结构剖视图；
图 8为本发明第五个实施例的结构剖视图；
图 9为本发明第六个实施例的结构剖视图；
图 10为本发明第七个实施例的结构剖视图；
图 11为本发明第八个实施例的结构剖视图。 具体实施方式
以下结合附图实施例对本发明作进一步详细描述。
如图 1〜4所示， 为本发明的第一个实施例。
一种空调用短管节流阀， 包括有呈管状的阀体 1， 阀体 1一般铜管， 当然也可为铝 或钢管制成，阀体以呈圆管状为最佳，当然也可矩形管，阀体 1的内径为 Φ 5〜Φ30πιιη。
阀体 1内设有能相对阀体 1轴向滑移的第一动阀芯 2, 第一动阀芯 2具有一贯穿其 轴心的第一毛细孔 21 , 及至少二个分布在该第一毛细孔 21周边且轴向贯穿的第一溢流 通道 22， 以四个第一溢流通道 22为最佳，本实施例中的第一溢流通道 22设置在第一动 阀芯 2周壁上并轴向贯穿的凹槽， 凹槽以半圆形凹槽为佳。
当然第一溢流通道 22还可为四个轴向贯穿第一动阔芯 2的通孔， 各第一溢流通道 22的横截面为圆孔状， 圆孔状的溢流孔通道比较容易加工。 当然横截面也可以为圆孔、 方孔、 三角形孔、 多边形孔、 腰形孔或月牙孔， 如图所示。
阀体 1内还设有仅具有一贯穿其轴心的毛细孔通道 31的过渡阀芯 3及具有供制冷 剂通过的第一通道 41的第一阻挡件 4，该第一阻挡件 4与阀体 1相对固定设置，第一阻 挡件 4为采用挤压方式在阀体 1内壁上形成内凸的凸环。 第一动阀芯 2位于过渡阀芯 3 和第一阻挡件 4之间，过渡阀芯 3和第一阻挡件 4之间的间距大于第一动阀芯 2的轴向 尺寸， 过渡阀芯 3的外周中部具有环形凹部 32， 阀体 1内具有内凸的环形挡部 11， 环 形挡部 11为在阀体 1的内表面挤压成型而成的环形凸环， 该环形挡部 11位于过渡阀芯 的环形凹部 32内并与环形凹部 32的侧壁进行挡配， 以使过渡阀芯 3只能在一定范围内 轴向滑移， 当过渡阀芯 3右移到极限位置时， 环形挡部 11与环形凹部 32的左侧内壁接 触， 当过渡阀芯 3左移到极限位置时， 环形挡部 11与环形凹部 32的右侧内壁接触。
前述的第一动阀芯 2上的第一毛细孔 21、 以及过渡阀芯 3上的毛细孔通道 31的孔 径为 Φ0.5〜Φ3ηηη。 经实验可知， 当毛细孔的孔径小于 0.5mm时， 制冷剂几乎不能通 过毛细孔， 当毛细孔的孔径大于 3mm时， 毛细孔又不能起到节流的作用， 因此， 上述 的第一毛细孔通道 21、毛细孔通道 31的孔径为 Φ0.5〜Φ3πιιη。在该范围内毛细孔偏小 则节流效果越好。
第一动阀芯 2的滑移能与过渡阀芯 3接触， 本实施例中第一动阀芯 2与过渡阀芯 3 之间为平面接触配合， 平面接触配合可简化第一动阀芯 2和过渡阀芯 3的结构。 当然， 第一动阀芯 2与过渡阀芯 3也可为锥面配合。
阔体 1内的两端还分别设置有第一过滤网 5和第二过滤网 6， 第一过滤网 5和第二 过滤网 6通过挤压的方式与阀体 1固定。 前述第一阻挡件 4、 第一动阀芯 2和过渡阀芯 3位于第一过滤网 5和第二过滤网 6之间。
在第一动阀芯 2移动至最左端状态下，第一动闽芯 2的左端面被第一阻挡件 4挡住， 第一动阀芯 2上的第一毛细孔 21和第一溢流孔 22均与第一阻挡件 4上的第一通道 41 相通； 在第一动阀芯 2移动到最右端状态下， 第一动阔芯 2的右端面与过渡阀芯 3的左 端面接触配合， 过渡阀芯 3的左端面将第一动阀芯 2上的第一溢流孔 22封堵住， 同时 第一动阀芯 2上的第一毛细孔 21与过渡阀芯 3的毛细孔通道 31相通。 如图 5所示， 为本发明的第二个实施例。
该实施例和第一个实施例的不同点在于， 该节流阀还包括衬管 9, 该衬管 9用金属 材质制成， 衬管 9的外周面与阀体 1内壁之间通过挤压的方式固定在一起， 而第一动阀 芯 2、 过渡动阀芯 3和第一阻挡件 4均设置在衬管 9内。 第一阻挡件 4为采用挤压方式 在衬管 91内壁上形成内凸的凸环。
本实施例中的第一动阔芯 2也可采用如图 4所示的动阀芯结构。 如图 6所示， 为本发明的第三个实施例。
该实施例和第一个实施例的不同点在于， 第一阻挡件 4为挡圈， 由于作为第一阻挡 件 4的挡圈的外周面和阀体内周面均为光滑面， 因此， 第一阻挡件 4的外周面与阔体 1 内壁之间以通过挤压的方式固定在一起， 具体可采用如下挤压方式， 在第一阻挡件 4外 周面上预先设有一条或多条环形槽 42，再于阀体 1外部施力，将所述阀体 1的内壁通过 挤压卡入环形槽 2内， 这样可使阀体 1与作为第一阻挡件 4的挡圈牢固结合。
本实施例中的第一动阀芯也可采用如图 4所示的动阀芯结构。 如图 7所示， 为本发明的第四个实施例。
该实施例和第二个实施例的不同点在于， 第一阻挡件 4为挡圈， 由于作为第一阻挡 件 4的挡圈的外周面和阀体内周面均为光滑面， 因此， 第一阻挡件 4的外周面与衬管 9 内壁之间以通过挤压的方式固定在一起， 具体可采用如下挤压方式， 在第一阻挡件 4外 周面上预先设有一条或多条环形槽 42, 再于阀体 1外部施力， 在第一、 二阻挡件 5、 6 外周面上分别预先设有一条或多条环形槽 42，再于阀体 1外部施力，将衬管 9的内壁通 过挤压卡入环形槽 42内， 以使衬管 9与第一阻挡件 4牢固结合， 同时阀体 1内壁也会 相应挤压到衬管 9外壁上。
本实施例中的第一动阀芯 2也可采用如图 4所示的动阀芯结构。 前述四个实施例的工作原理及过程基本相同， 具体说明如下：
当制冷剂从阀体 1左端流入， 制冷剂通过第一过滤网 5及第一阻挡件 4的通道 41 流入， 第一动阀芯 2在压力差的作用下右移， 在第一动阀芯 2移动过程中， 制冷剂通过 第一动阔芯 2上的第一毛细孔 21和各第一溢流孔 22， 同时通过第一动阔芯 2的制冷剂 也会推动过渡阀芯 3向右移动一定距离，直至环形挡部 11与环形凹部 32的左侧内壁接 触， 当第一动阀芯 2移动到最右端状态下， 第一动阀芯 2的右端面与过渡阀芯 3的左端 面接触配合， 过渡阀芯 3的左端面将第一动阀芯 2上的第一溢流孔 22封堵住， 第一动 阀芯 2上的第一毛细孔 21与过渡阔芯 3的毛细孔通道 31相通，制冷剂只能从第一动阀 芯 2上的第一毛细孔 21和过渡阀芯 3的毛细孔通道 31通过，制冷剂通过过渡阔芯 3后 继续往右流动， 经第二过滤网 6后流出节流阀， 实现正向动态节流。
当制冷剂从阀体 1右端流入时， 制冷剂通过第二过滤网 6， 并推动过渡阀芯 3和第 一动阀芯 2向左移动一定距离， 直至环形挡部 11与环形凹部 32的右侧内壁接触， 同时 制冷剂通过过渡闽芯 3的毛细孔通道 31，第一动阀芯 2在压力差的作用下相对过渡阀芯 3左移， 第一动阀芯 2逐渐远离过渡阀芯 3， 制冷剂通过第一动阀芯 2上的第一毛细孔 21和各第一溢流孔 22后， 经由第一过滤网 5后流出节流阀， 实现反向动态节流。 如图 8所示， 为本发明的第五个实施例。
本实施例和第一个实施例的不同点在于， 阀体 1内还设有第二动阀芯 7和第二阻挡 件 8， 第二动阀芯 7位于过渡阀芯 3和第二阻挡件 8之间， 过渡阀芯 3和第二阻挡件 8 之间的间距大于第二动阀芯 7的轴向尺寸， 该第二阻挡件 8与阀体 1相对固定设置， 第 二阻挡件 8为采用挤压方式在阀体 1内壁上形成内凸的凸环。第二动阀芯 7上仅具有一 贯穿其轴心的第二毛细孔 71， 第二阻挡件 8上具有供制冷剂通过的第二通道 81。
在第二动阀芯 7移动至最左端状态下，第二动阀芯 7的左端面与过渡阀芯 3的右端 面接触配合， 第二动阀芯 7上的第二毛细孔 71与过渡阀芯 3的毛细孔通道 31相通； 在 第二动阀芯 7移动到最右端状态下， 第二动阀芯 7的右端面被第二阻挡件 8挡住， 第二 动阀芯 7上的第二毛细孔 71与第二阻挡件 8上的第二通道 81相通。 如图 9所示， 为本发明的第六个实施例。
该实施例和第五个实施例的不同点在于， 还包括一衬管 9， 衬管 9的设置方式参考 实施例二。 如图 10所示， 为本发明的第七个实施例。
该实施例和第五个实施例的不同点在于， 第一阻挡件 4和第二阻挡件 8为挡圈， 这 种挡圈结构的第一阻挡件 4和第二阻挡件 8的设置方式可参考实施例三。 如图 11所示， 为本发明的第八个实施例。
该实施例和第七个实施例的不同点在于， 还包括一衬管 9， 衬管 9的设置方式参考 实施例四。 前述第 5〜8个实施例的工作原理及过程基本相同， 具体说明如下：
当制冷剂从阔体 1左端流入， 制冷剂通过第一过滤网 5及第一阻挡件 4的通道 41 流入， 第一动阀芯 2在压力差的作用下右移， 在第一动阀芯 2移动过程中， 制冷剂通过 第一动阀芯 2上的第一毛细孔 21和各第一溢流孔 22, 同时通过第一动阀芯 2的制冷剂 也会推动过渡阔芯 3向右移动一定距离，直至环形挡部 11与环形凹部 32的左侧内壁接 触， 当第一动阀芯 2移动到最右端状态下， 第一动阀芯 2的右端面与过渡阀芯 3的左端 面接触配合， 过渡阀芯 3的左端面将第一动阀芯 2上的第一溢流孔 22封堵住， 第一动 阔芯 2上的第一毛细孔 21与过渡阀芯 3的毛细孔通道 31相通，制冷剂只能从第一动阀 芯 2上的第一毛细孔 21和过渡阔芯 3的毛细孔通道 31通过， 实现第一次动态节流； 制 冷剂通过过渡阀芯 3后继续往右流动， 第二动阀芯 7在压力差的作用下右移， 在第二动 阀芯 7移动过程中，制冷剂通过第二动阀芯 7上的第二毛细孔 71，在第二动阀芯 7移动 到最右端状态下， 第二动阀芯 7在第二阻挡件 8的阻挡下停止移动， 制冷剂经由第二动 阀芯 7上的第二毛细孔 71与第二阻挡件 8上的第二通道 81后，最后经第二过滤网 6后 流出节流阀， 实现第二次动态节流。
当制冷剂从阀体 1右端流入时， 其工作过程刚好与相反， 在这不再累述。

Claims

权 利 要 求
1、 一种空调用短管节流阔， 包括有呈管状的阀体 (1)， 闽体 (1)内设有能相对阀体 (1) 轴向滑移的第一动阔芯 (2)， 第一动阀芯 (2)具有一贯穿其轴心的第一毛细孔 (21)， 及至少 二个分布在该第一毛细孔 (21)周边且轴向贯穿的第一溢流通道 (22)， 其特征在于： 所述 阀体 (1)内还设有仅具有贯穿其轴心的毛细孔通道 (31)的过渡阀芯 (3)及具有供制冷剂通 过的第一通道 (41)的第一阻挡件 (4)，该第一阻挡件 (4)与阀体 (1)相对固定设置，所述第一 动闽芯 (2)位于过渡阀芯 (3)和第一阻挡件 (4)之间， 所述过渡阀芯 (3)的外周中部具有环形 凹部 (32)， 阀体 (1)内具有内凸的环形挡部 (11), 该环形挡部 (11)位于所述过渡阀芯的环形 凹部 (32)内， 以使过渡阀芯 (3)只能在一定范围内轴向滑移。
2、根据权利要求 1所述的空调用短管节流阀， 其特征在于： 所述第一溢流通道 (22) 为轴向贯穿第一动阀芯 (2)的通孔。
3、根据权利要求 1所述的空调用短管节流阔， 其特征在于： 所述第一溢流通道 (22) 为设置在第一动阀芯 (2)周壁上并轴向贯穿的凹槽。
4、 根据权利要求 1所述的空调用短管节流阀， 其特征在于： 所述阀体 (1)内的两端 还分别设置有第一过滤网 (5)和第二过滤网 (6), 所述第一过滤网 (5)和第二过滤网 (6)与阔 体 (1)相对固定。
5、 根据权利要求 1所述的家用空调节流管， 其特征在于： 所述阀体 (1)内还设有第 二动闽芯 (7)和第二阻挡件 (8)， 所述第二动阀芯 (7)位于过渡阀芯 (3)和第二阻挡件 (8)之 间， 第二动阀芯 (7)上仅具有一贯穿其轴心的第二毛细孔 (71)， 第二阻挡件 (8)上具有供制 冷剂通过的第二通道 (81)， 该第二阻挡件 (7)与阀体 (1)相对固定设置。
6、 根据权利要求 5 所述的空调用短管节流阀， 其特征在于： 所述各阻挡件 (4、 8) 均为挡圈，在所述各阻挡件 (4、 8)的外周面上分别预先设有环形槽 (42、 82)，所述阀体 (1) 的内壁通过挤压卡入所述的环形槽 (42、 82)内。
7、 根据权利要求 5 所述的空调用短管节流阀， 其特征在于： 所述各阻挡件 (4、 8) 均为在阀体 (1)内壁上形成内凸的凸环。
8、 根据权利要求 1〜5中任一权利要求所述的空调用短管节流阔， 其特征在于： 所 述过渡阀芯 (2)、 各动阀芯 (2、 7)、 环形挡部 (11)、 各过滤网 (5、 6)及各阻挡件 (4、 8)与阔 体 (1)内壁之间还设有一衬管 (9)， 所述衬管 (9)外周面与阀体 (1)内壁之间通过挤压的方式 固定在一起。
9、 根据权利要求 8所述的空调用短管节流阔， 其特征在于： 所述各阻挡件 (4、 8) 均为挡圈， 在所述各阻挡件 (4、 8)的外周面上分别预先设有一条或多条环形槽 (42、 82)， 所述衬管 (9)的内壁通过挤压卡入所述的环形槽 (42、 82)内。
10、 根据权利要求 8所述的空调用短管节流阔， 其特征在于： 所述各阻挡件 (4、 8) 为在衬管 (9)内壁上形成内凸的凸环。
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CN110145902A (zh) * 2019-05-28 2019-08-20 宁波奥克斯电气股份有限公司 一种双向节流的过滤器及空调器
CN113970200A (zh) * 2021-10-27 2022-01-25 珠海格力电器股份有限公司 一种降噪的节流短管

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CN102878734B (zh) * 2012-10-26 2014-10-15 温岭市恒发空调部件有限公司 一种膨胀阀
CN103216980B (zh) * 2013-04-27 2015-02-04 温岭市恒发空调部件有限公司 一种双向流通膨胀阀
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