WO2014063558A1 - Valve de détente - Google Patents

Valve de détente Download PDF

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Publication number
WO2014063558A1
WO2014063558A1 PCT/CN2013/084559 CN2013084559W WO2014063558A1 WO 2014063558 A1 WO2014063558 A1 WO 2014063558A1 CN 2013084559 W CN2013084559 W CN 2013084559W WO 2014063558 A1 WO2014063558 A1 WO 2014063558A1
Authority
WO
WIPO (PCT)
Prior art keywords
spool
hole
valve
valve body
expansion valve
Prior art date
Application number
PCT/CN2013/084559
Other languages
English (en)
Chinese (zh)
Inventor
金耿
阮义兵
Original Assignee
温岭市恒发空调部件有限公司
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
Application filed by 温岭市恒发空调部件有限公司 filed Critical 温岭市恒发空调部件有限公司
Priority to US14/437,240 priority Critical patent/US20150276286A1/en
Priority to JP2015534902A priority patent/JP6134386B2/ja
Publication of WO2014063558A1 publication Critical patent/WO2014063558A1/fr

Links

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
    • F25B41/31—Expansion valves
    • F25B41/325—Expansion valves having two or more valve members
    • 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
    • F25B41/31—Expansion valves
    • F25B41/33—Expansion valves with the valve member being actuated by the fluid pressure, e.g. by the pressure of the refrigerant
    • 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
    • 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
    • F25B2341/00—Details of ejectors not being used as compression device; Details of flow restrictors or expansion valves
    • F25B2341/06—Details of flow restrictors or expansion valves
    • F25B2341/063—Feed forward expansion valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2500/00—Problems to be solved
    • F25B2500/12—Sound

Definitions

  • the invention belongs to the technical field of air conditioners and relates to a mechanical automatic expansion valve for inverter air conditioner refrigeration. Background technique
  • the expansion valve is an important component in the refrigeration system and is typically installed between the condenser and the evaporator.
  • the expansion valve enables the gas evaporated by the evaporator to be liquefied by the compressor to the high temperature and high pressure liquid refrigerant, and is throttled by the throttle to become a low temperature and low pressure mist liquid refrigerant, and then the refrigerant is absorbed in the evaporator. The heat reaches the cooling effect.
  • the expansion valve controls the flow of the valve through a change in the degree of superheat at the end of the evaporator, preventing liquid flow shocks from being drawn into the compressor due to under-utilization of the evaporator area and excessive flow of the evaporator due to insufficient vaporization of the refrigerant.
  • the expansion valve for air conditioning is divided into mechanical expansion valve and electronic expansion valve.
  • the existing inverter air conditioner mainly uses electronic expansion valve to adjust the pressure difference by adjusting the diameter to control the liquefaction and gasification of the refrigerant according to the design requirements. Some air conditioners also use mechanical expansion valves instead. Electronic valve.
  • the electronic valve is driven by a digital signal to control the size of the electronic valve, ensuring a constant pressure difference before and after the valve, and fully utilizing the function of the condenser and the evaporator.
  • the compressor motor speed is adjustable, the motor speed can be adjusted in time, so that the compressor motor speed and the electronic expansion valve motor rotation angle can be changed at the same time to ensure that the pressure difference between the front and the back of the electronic valve is constant, so the air conditioner is highly efficient.
  • the orifice has a movable member in which the orifice is kept in a clear or closed state.
  • the throttle hole and the movable member cooperate to form a one-way throttle structure inside the thermal expansion valve, which is similar to a one-way throttle valve.
  • the existence of the structure allows the thermal expansion valve to circulate in both directions, and is convenient when applied to an air conditioning system. Installation reduces potential leaks due to the large number of quilting and reduces the manufacturing cost of the air conditioning system.
  • the two-way flow expansion valve can realize two-way circulation, it is not a two-way flow in the true sense. Because the valve only flows in the forward direction, the temperature change of the book valve is sensed by the temperature sensing package.
  • An object of the present invention is to solve the above problems in the prior art, and an expansion valve which regulates the diameter of a valve by controlling the output flow of the compressor and ensures the pressure difference between the front and rear of the valve is proposed.
  • An expansion valve characterized in that the expansion valve comprises an outer casing having an inlet end and an outlet end, wherein the casing is fixed with a straight cylindrical valve body having a lumen
  • the side wall of the valve body is provided with an inlet and an outlet communicating with the inner cavity and the outer casing, and a partition sleeve separating the inlet and the outlet is disposed between the outer casing and the valve body, and the inner cavity is provided with energy a spool 1 and a spool 2 which are slid along the inner cavity, and a retaining ring is fixed in a middle portion of the inner cavity between the spool 1 and the spool 2, and the inner ends of the inner cavity are respectively provided Spool one and spool 2 have m 3 ⁇ 4
  • a spring assembly that moves toward the retaining ring, and a damping structure capable of buffering the spool 1 and the spool 2 is disposed between the spool 1 and the spool 2.
  • the expansion valve has a paired male and female valve core structure, the valve core 1 and the valve core 2, and one of the spools is controlled by the pressure line pressure difference change; due to the existence of the damping structure, the valve core is close to the valve core 2
  • a smooth buffering process reduces the impact between the spools, reduces the wear of the spool as it abuts the spool, and increases the service life of the expander.
  • the retaining ring includes a pilot hole, an annular cavity, a flow guiding hole for communicating the annular cavity with the inlet, and a retaining groove engageable with the valve body.
  • the guiding hole is used to cooperate with the spool, so that the spool can enter the retaining ring, and the retaining groove can firmly fix the retaining ring in the inner cavity.
  • the damping structure includes a front cylinder, a front throttle cone, a rear cylinder, a rear throttle cone, a front guide pillar and the valve core 2 which are sequentially provided in the head of the spool 1 a rear throttle cone, a rear cylindrical bore, a through-groove, a front throttle cone and a front cylindrical bore matched with a head of the spool, and the valve core 2 is further provided with a front cylindrical bore connected to the outlet Passing through the mouth.
  • a relatively closed one-way lumen is formed between the spool 2 and the spool one as a front damping chamber.
  • the front guide post of the spool 1 cooperates with the inner bore of the retaining ring. Since the mating clearance is relatively small, a relatively closed inner cavity is formed between the spool and the retaining ring as a medium damping cavity.
  • the valve spool has a better cushion when moving forward to close the valve, reducing the impact of the spool and increasing the life of the valve.
  • valve core is opened m 3 ⁇ 4
  • the spool 1 and the spool Connect the through hole of the outside of the valve body and the through hole.
  • the spool 1 and the spool are not moved, and the refrigerant enters the through-hole from the through hole, and then flows out through the outlet of the retaining ring and the valve body.
  • the small flow refrigerant spool 1 and the spool 2 can be moved, reducing the wear of each spool and increasing the life of the spring assembly.
  • the through hole is provided with a capillary tube.
  • a predetermined pressure drop is generated in the refrigeration system, and the capillary relies on its flow resistance to produce a pressure drop along the length to control the flow of the refrigerant and maintain the differential pressure between the condenser and the evaporator, ensuring minimum continuous cooling for different refrigeration settings.
  • the valve body is provided with a flow guiding groove that can communicate with the through-hole and the front cylindrical hole.
  • the refrigerant can directly enter the front cylindrical hole from the through-hole, avoiding the mutual movement between the two spools and reducing the wear caused by the movement of the spool.
  • the valve body 2 has a through hole connecting the through hole and the flow guiding port.
  • the refrigerant can enter the diversion port directly from the through-the-vacancy.
  • the valve body has a through hole communicating with the rear throttle hole and the front cylindrical hole.
  • the refrigerant can enter the front cylindrical bore directly from the rear throttle cone.
  • the valve body has a through hole extending axially through the valve body.
  • the small flow of refrigerant can be directly discharged from the valve body passage into the valve body cavity, and the valve body is discharged from the small hole of the spring seat.
  • the spring assembly includes a spring seat and a spring, the spring end abuts against the valve core 1 or the valve core 2, and the other end abuts against the spring seat, and the spring seat is fixed.
  • a small hole communicating with the outer casing is opened, and the tail of the valve core 1 and the valve core 2 have a cylinder and a damping with a small clearance gap with the valve body.
  • the ring groove, the damping ring groove is provided with an open damping ring.
  • a rear damping chamber is formed between the spring seat, the valve body, the valve core one or the valve core 2, and the damping ring, and serves as an expansion valve direction control chamber.
  • the spring seat has a limit lever that restricts the swing of the spring. After the limit lever is added, the axial swing amplitude of the spring is limited to ensure that the spring does not overload and improve the spring life.
  • a filter screen assembly is provided at the inlet end and the outlet end of the casing, and the screen assembly includes a screen frame and a screen fixed to the casing.
  • the filter assembly is used to filter foreign matter trapped in the refrigerant to prevent clogging of the expansion valve assembly.
  • the present expansion valve has the following advantages:
  • the structure is simple, and the change of the pressure of the cold pipeline is controlled by the reversing valve to control the direction of the expansion valve.
  • the pressure difference between the inner chamber and the outlet and the inlet is balanced by the damping structure to ensure the pressure required for the refrigerant to be liquefied.
  • the valve core can not operate, reducing the frequent movement of the spring and improving the service life of the expansion valve assembly.
  • a front damper cavity is formed between the spool 1 and the spool 2, so that the spool 1 has better cushioning when it contacts the spool 2, reducing their impact and increasing the life of the expansion valve.
  • Figure 1 is a schematic view showing the structure of the present expansion valve of the embodiment.
  • Fig. 2 is a schematic view showing the structure of the valve body 2 of the embodiment.
  • Fig. 3 is a schematic structural view of a valve body 1 of the embodiment.
  • Fig. 4 is a schematic view showing the structure of the retaining ring of the embodiment.
  • Fig. 5 is a schematic view of the spring seat structure of the embodiment. m 3 ⁇ 4
  • FIG. 6 is a schematic diagram of a small flow guiding trajectory structure of the second embodiment.
  • FIG. 7 is a schematic diagram of a small flow flow guiding trajectory structure of the third embodiment.
  • Fig. 8 is a schematic view showing the structure of a small flow guiding trajectory of the fourth embodiment.
  • Embodiment 9 is a schematic diagram of a small flow flow guiding trajectory structure of Embodiment 5.
  • Fig. 10 is a schematic view showing the structure of a small flow flow guiding trajectory of the sixth embodiment.
  • Valve body 1 1. Import; 12, outlet; 2. Spool one; 21, front cylinder; 22, front throttle cone; 23, rear cylinder; 24, rear throttle cone; 26, damping ring groove; 27, guide groove; 3, valve core 2; 31, rear throttle cone hole; 32, rear cylindrical hole; 33, through slot; 34, through hole; 35, front throttle cone 36, front cylindrical hole; 37, diversion port; 4, spring; 5, spring seat; 51, limit rod; 52, small hole; 6, damping ring; 7, retaining ring; 71, diversion hole; , stop groove; 73, guide hole; 74, annular cavity; 8, spacer; 9, filter assembly; 10, housing; 101, inlet end; 102, the outlet end. detailed description
  • the expansion valve includes a casing 10 having an inlet end 101 and an outlet end 102.
  • a casing body 1 having a lumen is fixed in the casing 10, and a communicating cavity is formed in the side wall of the valve body 1.
  • an inlet 11 and an outlet 12 of the outer casing 10, and a spacer 8 is disposed between the outer casing 10 and the valve body 1 to block the inlet 11 and the outlet 12.
  • the inner cavity is provided with a spool 2 which can slide along the inner cavity.
  • the valve core 2, a retaining ring 7 is fixed in the middle of the inner cavity between the valve core 2 and the valve core 2, and the inner cavity is respectively provided with the valve core 2 and the valve core 2 having a tendency to move toward the retaining ring 7.
  • the spring assembly, between the spool 2 and the spool 2 is provided with a damping structure capable of buffering the spool 2 and the spool 2.
  • the retaining ring 7 includes a guiding hole 73, an annular cavity 74, and a guide for connecting the annular cavity 74 with the inlet 11 m 3 ⁇ 4
  • the damper structure includes a front cylinder 2 1 , a front throttle cone 22 , a rear cylinder 23 , a rear throttle cone 24 , a front guide pillar 25 , and a valve core 2 , which in turn have a valve core 2 the head matching matching rear throttle cone 3 1 , the rear cylindrical hole 32 , the through slot 33 , the front throttle cone 35 and the front cylindrical bore 36 , and the spool 2 is provided with a front cylindrical bore 36 and an outlet 12-phase connected flow port 37.
  • the spring assembly includes a spring seat 5 and a spring 4, one end of which abuts against the spool one or the spool 2, and the other end abuts against the spring seat 5.
  • the spring seat 5 is fixed at both ends of the valve body 1 and has a small hole 52 communicating with the outer casing 10.
  • the spring seat 5 has a limiting rod 51 for restricting the swing of the spring 4.
  • Both the spool 2 and the tail of the spool 2 have a cylindrical body and a damper ring groove 26 which have a small clearance with the valve body 1, and the damper ring groove 26 is provided with an open damper ring 6.
  • a screen assembly 9 is provided at the inlet end 101 and the outlet end 102 of the outer casing 10.
  • the screen assembly 9 includes a screen holder and a screen fixed to the outer casing 10.
  • the refrigerant enters from the outer casing 10, and after passing through the filter assembly 9, the control circuit and the conduction path enter the valve.
  • the shell IJ If the refrigerant enters from the outlet end 102 of one side of the spool 2, the shell IJ:
  • Control circuit The refrigerant enters from the outlet end 102 of the outer casing 10, passes through the filter assembly 9 at the outlet end 102, and then passes through the small hole 52 of the spring seat 5 to act on the spool 2, since the pressure at the outlet 12 of the valve is greater than Import 11, so push the spool 2 3. At this time, the refrigerant in the inner cavity of the valve body 2, the valve body 1 and the spring seat 5 is discharged through the small hole 52 of the spring seat 5 and then merged with the flow passage. When the spool 2 is abutted against the retaining ring 7, the spool 2 stops and unloads.
  • the shell IJ If the refrigerant enters from the inlet end 101 of one side of the spool one, the shell IJ:
  • Control circuit The refrigerant enters the small hole 52 of the spring seat 5 and acts on the spool one. Since the pressure of the inlet 1 1 of the valve is greater than the outlet 12, the spool 2 is pushed close to the retaining ring 7. At this time, the refrigerant in the inner cavity surrounded by the valve body 2, the valve body 1 and the spring seat 5 is discharged from the valve body 1 through the small hole 52 of the spring seat 5, and merges with the flow path. When the spool 2 abuts against the retaining ring 7, the spool 2 stops acting and unloads.
  • the refrigerant can only enter the inlet 11 of the valve body 1 and enter the retaining ring 7 after passing through the flow guiding hole 71 at the retaining ring 7.
  • the annular cavity 74 passes through the gap between the spool 2 and the spool 2, and is discharged from the flow guiding port 37 of the spool 2 and the outlet 12 of the valve body 1 through the valve body 1 and the outer casing 10.
  • the gap here merged with the control path, exits the valve from the outlet end 102 of the outer casing 10 through the screen assembly 9 consisting of the screen frame and the screen at the outlet end 102.
  • a relatively closed inner cavity between the spool 1 and the spool 2 and a relatively closed inner cavity between the retaining ring 7 and the spool 2 are designed on the moving path of the spool, there is also a The relatively closed inner cavity between the valve body 1, the spring seat 5 and the spool 2 or the spool 2, so that a plurality of dampings can be generated when the spool 2 or the spool 2 is moved. Due to the presence of multiple damping, there is a smooth buffering process when the spool 2 or the spool 2 moves, which reduces the impact of the two spools and reduces the conical head and the spool 2 on the spool. Wear at the time of abutment to increase the service life of the expansion valve.
  • the structure and principle of the second embodiment are basically similar to those of the first embodiment. As shown in FIG. 6, the difference from the first embodiment is that a small flow guiding trajectory structure is added.
  • the small flow guiding trajectory structure is such that the valve core 2 is provided with a through hole 34 communicating with the outer portion of the valve body 1 and the through hole 33, and the through hole 34 is provided with a capillary tube.
  • the flow rate of the through holes 34 can be changed by adding a capillary.
  • Embodiment 3 m 3 ⁇ 4
  • the structure and principle of the third embodiment are basically similar to those of the second embodiment. As shown in FIG. 7, the difference from the second embodiment lies in the small flow guiding trajectory structure.
  • the small flow guiding trajectory structure is such that the valve core 2 is provided with a flow guiding groove 27 which can connect the through-hole 33 and the front cylindrical hole 36.
  • the structure and principle of the fourth embodiment are basically similar to those of the second embodiment. As shown in FIG. 8, the difference from the second embodiment lies in the small flow guiding trajectory structure.
  • the small flow guiding trajectory structure is such that the valve core 2 is provided with a through hole 34 connecting the permeable groove 33 and the flow guiding port 37.
  • the structure and principle of the fifth embodiment are basically similar to those of the second embodiment. As shown in FIG. 9, the difference from the second embodiment lies in the small flow guiding trajectory structure.
  • the small flow guiding trajectory structure has a through hole 34 connecting the rear throttle cone 31 and the front cylindrical hole 36 to the spool 1 .
  • the structure and principle of the sixth embodiment are basically similar to those of the second embodiment. As shown in FIG. 10, the difference from the second embodiment lies in the small flow guiding trajectory structure.
  • the small flow guiding trajectory structure has a through hole 34 extending axially through the spool 2 from the spool.
  • the small-flow refrigerant is discharged from the valve body 1 through the outlet 12 of the valve body 1, but is directly discharged from the valve body 1 by the small hole 52 of the spring seat 5.

Abstract

L'invention porte sur une valve de détente, comprenant une enveloppe (10) ayant une extrémité d'entrée (101) et une extrémité de sortie (102), un corps de valve (1) disposé de façon fixe à l'intérieur de l'enveloppe (10) présente une cavité intérieure et a une forme tubulaire droite, une paroi latérale du corps de valve (1) étant munie d'une entrée (11) et d'une sortie (12) respectivement en communication avec la cavité intérieure et l'enveloppe (10) ; une douille de séparation (8) servant à séparer l'entrée (11) de la sortie (12) est disposée entre l'enveloppe (10) et le corps de valve (1) ; un premier noyau de valve (2) et un second noyau de valve (3) sont disposés dans la cavité intérieure et sont tous deux aptes à coulisser le long de la cavité intérieure et à s'accoupler l'un à l'autre ; une bague de retenue (7) est fixée dans la partie centrale de la cavité intérieure entre le premier noyau de valve (2) et le second noyau de valve (3) ; deux extrémités de la cavité intérieure sont respectivement munies d'un ensemble à ressort qui a pour effet que le premier noyau de valve (2) et le second noyau de valve (3) tendent à se déplacer vers la bague de retenue (7) ; et une structure d'amortissement, apte à avoir un effet tampon sur le premier noyau de valve (2) et le second noyau de valve (3), est placée entre le premier noyau de valve (2) et le second noyau de valve (3).
PCT/CN2013/084559 2012-10-26 2013-09-29 Valve de détente WO2014063558A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US14/437,240 US20150276286A1 (en) 2012-10-26 2013-09-29 Expansion Valve
JP2015534902A JP6134386B2 (ja) 2012-10-26 2013-09-29 双方向膨張弁

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201210419218.1 2012-10-26
CN201210419218.1A CN102878734B (zh) 2012-10-26 2012-10-26 一种膨胀阀

Publications (1)

Publication Number Publication Date
WO2014063558A1 true WO2014063558A1 (fr) 2014-05-01

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2013/084559 WO2014063558A1 (fr) 2012-10-26 2013-09-29 Valve de détente

Country Status (4)

Country Link
US (1) US20150276286A1 (fr)
JP (1) JP6134386B2 (fr)
CN (1) CN102878734B (fr)
WO (1) WO2014063558A1 (fr)

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JP2015232389A (ja) * 2014-06-10 2015-12-24 温嶺市恒發空調部件有限公司Ｗｅｎｌｉｎｇ Ｈｅｎｇｆａ Ａｉｒｃｏｎｄｉｔｉｏｎ Ｃｏｍｐｏｎｅｎｔｓ Ｃｏ．，Ｌｔｄ 自動双方向膨張弁
US10240830B2 (en) 2013-07-04 2019-03-26 Danfoss A/S Expansion valve comprising a stop element
US10274236B2 (en) 2013-07-04 2019-04-30 Danfoss A/S Expansion valve with a two-step variable orifice area
US10281181B2 (en) 2013-07-04 2019-05-07 Danfoss A/S Expansion valve with a variable orifice area

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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
CN107906805B (zh) * 2017-12-18 2023-07-28 浙江泽顺制冷科技有限公司 一种膨胀阀
US10330362B1 (en) * 2017-12-20 2019-06-25 Rheem Manufacturing Company Compressor protection against liquid slug
CN109114853A (zh) * 2018-09-26 2019-01-01 温岭市恒发空调部件有限公司 一种膨胀阀
CN109374385B (zh) * 2018-10-23 2021-04-23 江苏艾洛特医药研究院有限公司 一种rna细胞分子检验装置
CN110185666B (zh) * 2019-06-10 2021-06-29 徐州阿马凯液压技术有限公司 一种液压阀换向缓冲装置
CN113404867A (zh) * 2020-03-17 2021-09-17 盾安环境技术有限公司 膨胀阀
CN111841378B (zh) * 2020-08-04 2022-12-30 成都格拉斯曼科技有限公司 一种玻璃生产流水线的药液搅拌装置

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US20080000255A1 (en) * 2006-06-30 2008-01-03 Wilson Shawn T Combination restrictor cartridge
CN102878734A (zh) * 2012-10-26 2013-01-16 温岭市恒发空调部件有限公司 一种膨胀阀
CN202915612U (zh) * 2012-10-26 2013-05-01 温岭市恒发空调部件有限公司 一种膨胀阀

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10240830B2 (en) 2013-07-04 2019-03-26 Danfoss A/S Expansion valve comprising a stop element
US10274236B2 (en) 2013-07-04 2019-04-30 Danfoss A/S Expansion valve with a two-step variable orifice area
US10281181B2 (en) 2013-07-04 2019-05-07 Danfoss A/S Expansion valve with a variable orifice area
JP2015232389A (ja) * 2014-06-10 2015-12-24 温嶺市恒發空調部件有限公司Ｗｅｎｌｉｎｇ Ｈｅｎｇｆａ Ａｉｒｃｏｎｄｉｔｉｏｎ Ｃｏｍｐｏｎｅｎｔｓ Ｃｏ．，Ｌｔｄ 自動双方向膨張弁

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JP2015530558A (ja) 2015-10-15
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US20150276286A1 (en) 2015-10-01
JP6134386B2 (ja) 2017-05-24

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