US3894561A - Four-way reversing valve with differential area operator - Google Patents

Four-way reversing valve with differential area operator Download PDF

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Publication number
US3894561A
US3894561A US45098474A US3894561A US 3894561 A US3894561 A US 3894561A US 45098474 A US45098474 A US 45098474A US 3894561 A US3894561 A US 3894561A
Authority
US
United States
Prior art keywords
chamber
valve
pressure
piston
pistons
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.)
Expired - Lifetime
Application number
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English (en)
Inventor
James M Thornbery
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.)
Eaton Corp
Original Assignee
Controls Company of America
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 Controls Company of America filed Critical Controls Company of America
Priority to US05450984 priority Critical patent/US3894561A/en
Priority to FR7507710A priority patent/FR2264234A1/fr
Priority to IT2124675A priority patent/IT1034264B/it
Priority to DE19752511370 priority patent/DE2511370A1/de
Priority to JP3102675A priority patent/JPS50127232A/ja
Priority to ES435623A priority patent/ES435623A1/es
Application granted granted Critical
Publication of US3894561A publication Critical patent/US3894561A/en
Priority to US05/703,840 priority patent/USRE30076E/en
Assigned to CONTROLS COMPANY OF AMERICA, 9655 W. SORENG AVENUE, SCHILLER PARK, IL., A CORP. OF DE. reassignment CONTROLS COMPANY OF AMERICA, 9655 W. SORENG AVENUE, SCHILLER PARK, IL., A CORP. OF DE. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: SINGER COMPANY, THE
Assigned to EATON CORPORATION, A CORP. OF OH. reassignment EATON CORPORATION, A CORP. OF OH. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: CONTROLS COMPANY OF AMERICA
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • F16K11/0655—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 with flat slides
    • 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
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
    • F16K31/36—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor
    • F16K31/363—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor the fluid acting on a piston
    • 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
    • F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
    • F25B41/26—Disposition of valves, e.g. of on-off valves or flow control valves of fluid flow reversing valves
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/86493—Multi-way valve unit
    • Y10T137/86718—Dividing into parallel flow paths with recombining
    • Y10T137/86726—Valve with bypass connections
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/86493—Multi-way valve unit
    • Y10T137/86839—Four port reversing valves

Definitions

  • the four-way reversing valve is utilized in refrigerating [2!] App! 0384 systems for heat pump applications to interchange the heating and cooling effects of the evaporator and conl52] US. Cl. 137/6252); l37/625.43; 251/3l denser.
  • the three-way pilot valve controls application [5 1] Int. Cl. H F16k 31/363 of high or low system pressure to the end of the cham- [58] Field of Search ]37/625,29 599,1, 62543; ber adjacent the large piston.
  • the two pistons result in movement of the slide valve to the left (both modifications) when high pressure is [56] R fe Cit d applied and to the right when low pressure is applied.
  • the object of this invention is to provide a four-way valve which is reliable in operation. competitive in cost. has tolerance to system dirt. and can be manufactured easily with reduced tolerance requirements.
  • FIG. 4 is a section on line 44 of FIG. 3 (but can be considered a similar section in FIG. I).
  • compressor It delivers hot refrigerant through conduit 12 to the slide valve chamber 14 in the reversing valve body 16. With the slide valve 18 in the position shown, the hot gas is delivered to outlet 20 and conduit 22 leading to the condenser 24.
  • Flow from the condenser 24 may be regulated by any suitable valve 26 to the evaporator 28 and flow from the evaporator goes through conduit 30 to port 32 below the slide valve 18 with the slide valve directing the flow to outlet 34 for return to the compressor 10 through conduit 36. Under these conditions the condenser 24 is hot and the evaporator 28 is cold.
  • the functions of the evaporator and condenser are reversed with the result that the formerly cold evaporator becomes hot and thus is suitable for heating the space rather than cooling the space.
  • the reversing valve I6 has a central chamber 14 in which the slide valve 18 is mounted.
  • the operation of the slide valve is controlled by the two pistons 38, which are of unequal size and interconnected for movement as a unit.
  • Pressure in chamber 42 between the piston 40 and the cylinder head is supplied through conduit 44 from either the high pressure or low pressure in accordance with the position of the three-way valve 46.
  • high pressure is supplied from conduit 12 through conduit 48, the three way valve 46, and conduit 44.
  • high pressure acts on both sides of piston 40 in the position shown in FIG. 1 with no net force tending to move piston 40.
  • three-way valve 46 When three-way valve 46 is actuated, low pressure is supplied to chamber 42 from conduit 36 through conduit 52, the three-way valve 46 and conduit 44. This results in a net force across piston 40 urging it to the right.
  • the left end of the valve body 16 is provided with a reduced diameter cylinder 54 with chamber 56 between piston 38 and cylinder head 58.
  • the pressure in chamber 56 is always at low pressure conditions, being connected to conduit 36 through conduit 60.
  • the two pistons are interconnected by the rod 62 which has an oblate portion 64 straddling slide valve 18 and connecting the rod to the valve so the piston motion will be transferred to the valve.
  • An oblate spring 66 underlies rod portion 64 with the spring being in the general shape of an M as seen in FIG. I.
  • the ends of the spring bear against the ledges 68 at either end of the slide valve and the two humps of the spring bear against the underside of the rod 64 so the slide valve 18 is held against the flat surface 70 through which the ports 32, 34 and 20 are bored.
  • the size of the cavity 72 in the slide valve and the projection of ledges 68 are important to achieve proper timing of the valve to prevent the system pressure being equalized during movement of the valve. Should that occur, the actuating forces on the piston assembly would be neutralized and the valve would hang up.
  • the net effect is a pressure derived force actuating interconnected pistons and the slide valve I8 to the right so that flow to the condenser 24 and evaporator 28 is reversed resulting in a reversal of function so the evaporator 28, which was cold. now becomes hot and can be used for heating a space rather than cooling the space.
  • Both piston heads are provided with bosses or pads 37, 41 (small and large pistons, respectively) which engage the cylinder heads to act as stops limiting movement of the piston assembly.
  • FIG. 3 The modification of FIG. 3 is not as desirable as that of FIG. I because it is more expensive to manufacture, but it illustrates the fact that there are variations possible in the construction.
  • the small diameter piston I38 and the large diameter piston 140 are interconnected by spindle with the chamber 94 at low system pressure supplied by conduit 96.
  • the larger diameter cylinder 92 is mounted on the right end of the main body 16 with ring 93 interconnecting the two. Flange 91 of the spindle 90 engages the ring 93 as illustrated in FIG. 3 to limit the movement of the piston assembly to the left.
  • Low pressure is provided to chamber 94 through conduit 96 at all times and can be communicated to chamber 142 between piston I40 and cylinder head 102 if the position of the three-way valve 46 is reversed from that illustrated.
  • high side pressure is communicated through conduit I48, the three-way valve 46, and conduit 144 to chamber 142. This, then, has a high side pressure acting in chamber 142 as well as in slide valve chamber 114.
  • the low pressure in chamber 94 is of no effect and, therefore, the net force acting on the piston assembly is to the left to the position shown.
  • the piston assembly is connected to the slide valve friction material pad 100 which prevents deflection of the rod under the force of spring 166 which acts between rod 162 and the slide valve 18 in the same manner as in FIG. 1.
  • the pressure differential required to initiate movement is about l psi which is readily attainable in an operating refrigerant system.
  • the force which must be overcome is the static friction load.
  • a reversing valve comprising,
  • a body including a valve chamber, a high pressure inlet to the chamber, a low pressure outlet from the chamber, and a pair of ports adjacent the outlet,
  • a slide valve in the chamber movable between two positions in which it serves to connect either of said ports to said outlet while the other port communicates with the chamber
  • said body including a large diameter cylinder and a small diameter cylinder
  • valve chamber is between the pistons.
  • a valve according to claim 1 in which both pistons are located at one end of the valve chamber and the space between the pistons is at low pressure.
  • a body including a valve chamber
  • a slide valve in the chamber movable between two positions in which either of the two ports comm unicates with said outlet while the other port communicates with the chamber to direct high pressure flowto the associated coil
  • said body including two cylinders of unequal size

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Thermal Sciences (AREA)
  • Multiple-Way Valves (AREA)
  • Fluid-Driven Valves (AREA)
  • Air Conditioning Control Device (AREA)
US05450984 1974-03-14 1974-03-14 Four-way reversing valve with differential area operator Expired - Lifetime US3894561A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
US05450984 US3894561A (en) 1974-03-14 1974-03-14 Four-way reversing valve with differential area operator
FR7507710A FR2264234A1 (enrdf_load_stackoverflow) 1974-03-14 1975-03-12
IT2124675A IT1034264B (it) 1974-03-14 1975-03-13 Valvola di inversione in particola re per compressore di impianti re friegeranti
JP3102675A JPS50127232A (enrdf_load_stackoverflow) 1974-03-14 1975-03-14
DE19752511370 DE2511370A1 (de) 1974-03-14 1975-03-14 Reversierschieber
ES435623A ES435623A1 (es) 1974-03-14 1975-03-14 Perfeccionamientos introducidos en una valvula de inver- sion.
US05/703,840 USRE30076E (en) 1974-03-14 1976-07-09 Four-way reversing valve with differential area operator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05450984 US3894561A (en) 1974-03-14 1974-03-14 Four-way reversing valve with differential area operator

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US05/703,840 Reissue USRE30076E (en) 1974-03-14 1976-07-09 Four-way reversing valve with differential area operator

Publications (1)

Publication Number Publication Date
US3894561A true US3894561A (en) 1975-07-15

Family

ID=23790325

Family Applications (1)

Application Number Title Priority Date Filing Date
US05450984 Expired - Lifetime US3894561A (en) 1974-03-14 1974-03-14 Four-way reversing valve with differential area operator

Country Status (6)

Country Link
US (1) US3894561A (enrdf_load_stackoverflow)
JP (1) JPS50127232A (enrdf_load_stackoverflow)
DE (1) DE2511370A1 (enrdf_load_stackoverflow)
ES (1) ES435623A1 (enrdf_load_stackoverflow)
FR (1) FR2264234A1 (enrdf_load_stackoverflow)
IT (1) IT1034264B (enrdf_load_stackoverflow)

Cited By (37)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4144905A (en) * 1977-08-19 1979-03-20 Robertshaw Controls Company Reversing valve construction and method of making the same
US4212324A (en) * 1978-11-15 1980-07-15 Robershaw Controls Company Reversing valve construction and method of making the same
US4248058A (en) * 1979-04-04 1981-02-03 Robertshaw Controls Company Differential piston type reversing valve construction, system utilizing the same and method of making
US4255939A (en) * 1979-05-21 1981-03-17 Emerson Electric Co. Four way reversing valve
US4406306A (en) * 1982-03-19 1983-09-27 Eaton Corporation Heat pump switchover valve
US4492252A (en) * 1981-03-18 1985-01-08 Kabushiki Kaisha Saginomiya Seisakusho Reversible valve for reversible refrigeration cycle
EP0173138A3 (en) * 1984-08-23 1987-08-05 Ranco Incorporated Refrigerant reversing valve
US4976286A (en) * 1989-12-14 1990-12-11 Automatic Switch Company Four-way slide valve
ES2079279A2 (es) * 1992-09-09 1996-01-01 Hitachi Ltd Aparato acondicionador de aire.
US6063169A (en) * 1996-05-10 2000-05-16 Litton Systems, Inc. Control means for molecular sieve on-board oxygen generator
US6158466A (en) * 1999-01-14 2000-12-12 Parker-Hannifin Corporation Four-way flow reversing valve for reversible refrigeration cycles
US6409807B1 (en) 2000-05-23 2002-06-25 Litton Systems, Inc. Linear gas valve cycle control, shut-off-valve and self test
EP1371889A3 (en) * 2002-06-13 2004-02-11 TGK Co., Ltd. Three-way switching valve
US6698452B2 (en) 2000-01-19 2004-03-02 Emerson Electric Co. Cycle reversing valve for use in heat pumps
EP1092928A4 (en) * 1998-07-02 2005-01-05 Saginomiyaseisakusho Kk FLOW SWITCHING VALVE AND VALVE CONTROL METHOD, COMPRESSOR WITH FLOW SWITCHING VALVE, AND DEVICE FOR CONTROLLING THE COOLING CIRCUIT
CN100342139C (zh) * 2003-09-30 2007-10-10 三星电子株式会社 可变容量旋转压缩机
CN100346074C (zh) * 2003-09-30 2007-10-31 三星电子株式会社 变容旋转压缩机
CN100395453C (zh) * 2003-09-19 2008-06-18 三星电子株式会社 可变容量旋转式压缩机
CN101319734B (zh) * 2007-06-04 2010-09-22 浙江三花制冷集团有限公司 四通换向阀之活塞连杆
US20100307607A1 (en) * 2009-06-04 2010-12-09 James Glenn Ary Reversing valve
US20110088427A1 (en) * 2008-06-12 2011-04-21 Yutaka Ishii Control Valve and Air Conditioner Equipped with the Valve
CN101666386B (zh) * 2009-09-18 2012-01-18 清华大学 一种自力式三通阀
CN102954243A (zh) * 2011-08-29 2013-03-06 浙江三花制冷集团有限公司 大型四通换向阀及其滑块部件
CN104634010A (zh) * 2014-12-31 2015-05-20 浙江陆特能源科技股份有限公司 制冷制热切换管路的施工工艺及其切换系统
CN106032846A (zh) * 2015-03-17 2016-10-19 浙江盾安禾田金属有限公司 自力式三通阀及其空调系统
CN106763894A (zh) * 2015-11-24 2017-05-31 株式会社鹭宫制作所 切换阀以及冷冻循环
CN107237900A (zh) * 2016-03-29 2017-10-10 珠海华宇金属有限公司 一种板弹簧及四通换向阀
CN108253669A (zh) * 2016-12-29 2018-07-06 杭州三花研究院有限公司 多通换向装置及空调系统
US20180299173A1 (en) * 2015-05-14 2018-10-18 Jhejiang Sanhua Climate And Appliance Controls Group., Ltd. Reversing valve and cooling system having same
CN111120690A (zh) * 2018-10-31 2020-05-08 广东美芝精密制造有限公司 四通阀
CN111911661A (zh) * 2019-05-07 2020-11-10 株式会社不二工机 流路切换阀
US10907748B2 (en) * 2016-03-30 2021-02-02 Ckd Corporation Flow path switching valve and manufacturing method therefor
US11268628B2 (en) 2017-12-25 2022-03-08 Ckd Corporation Electromagnetic actuator
WO2022161457A1 (zh) * 2021-02-01 2022-08-04 浙江三花智能控制股份有限公司 电磁切换阀
US20230228334A1 (en) * 2020-09-25 2023-07-20 Zhejiang Dunan Artificial Environment Co., Ltd. Guide frame for four-way reversing valve
US20230358323A1 (en) * 2020-08-20 2023-11-09 Zhejiang Dunan Artificial Environment Co., Ltd. Valve Core Assembly and Reversing Valve with Valve Core Assembly
US20250230958A1 (en) * 2024-01-16 2025-07-17 Haier Us Appliance Solutions, Inc. Reversing valve with integrated heat exchanger and bypass

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5749017Y2 (enrdf_load_stackoverflow) * 1979-10-16 1982-10-27
JPH0447493Y2 (enrdf_load_stackoverflow) * 1984-12-26 1992-11-10
JP6215802B2 (ja) * 2014-09-10 2017-10-18 株式会社鷺宮製作所 スライド弁及び冷凍サイクル
JP2017155887A (ja) * 2016-03-03 2017-09-07 株式会社鷺宮製作所 スライド式切換弁および冷凍サイクルシステム
JP2017150670A (ja) * 2017-04-28 2017-08-31 株式会社鷺宮製作所 スライド弁及び冷凍サイクル

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2920653A (en) * 1954-07-16 1960-01-12 Charles J Wolff Valve apparatus
US3448959A (en) * 1966-08-29 1969-06-10 Robertshaw Controls Co Valve construction having rolling diaphragm actuator means therefor

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2920653A (en) * 1954-07-16 1960-01-12 Charles J Wolff Valve apparatus
US3448959A (en) * 1966-08-29 1969-06-10 Robertshaw Controls Co Valve construction having rolling diaphragm actuator means therefor

Cited By (50)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4144905A (en) * 1977-08-19 1979-03-20 Robertshaw Controls Company Reversing valve construction and method of making the same
US4212324A (en) * 1978-11-15 1980-07-15 Robershaw Controls Company Reversing valve construction and method of making the same
US4248058A (en) * 1979-04-04 1981-02-03 Robertshaw Controls Company Differential piston type reversing valve construction, system utilizing the same and method of making
US4255939A (en) * 1979-05-21 1981-03-17 Emerson Electric Co. Four way reversing valve
US4492252A (en) * 1981-03-18 1985-01-08 Kabushiki Kaisha Saginomiya Seisakusho Reversible valve for reversible refrigeration cycle
US4406306A (en) * 1982-03-19 1983-09-27 Eaton Corporation Heat pump switchover valve
EP0173138A3 (en) * 1984-08-23 1987-08-05 Ranco Incorporated Refrigerant reversing valve
US4976286A (en) * 1989-12-14 1990-12-11 Automatic Switch Company Four-way slide valve
FR2656061A1 (fr) * 1989-12-14 1991-06-21 Automatic Switch Co Vanne a tiroir et quatre voies.
BE1004131A5 (fr) * 1989-12-14 1992-09-29 Automatic Switch Co Vanne a tiroir et quatre voies.
ES2079279A2 (es) * 1992-09-09 1996-01-01 Hitachi Ltd Aparato acondicionador de aire.
US6063169A (en) * 1996-05-10 2000-05-16 Litton Systems, Inc. Control means for molecular sieve on-board oxygen generator
EP1092928A4 (en) * 1998-07-02 2005-01-05 Saginomiyaseisakusho Kk FLOW SWITCHING VALVE AND VALVE CONTROL METHOD, COMPRESSOR WITH FLOW SWITCHING VALVE, AND DEVICE FOR CONTROLLING THE COOLING CIRCUIT
US6158466A (en) * 1999-01-14 2000-12-12 Parker-Hannifin Corporation Four-way flow reversing valve for reversible refrigeration cycles
US6698452B2 (en) 2000-01-19 2004-03-02 Emerson Electric Co. Cycle reversing valve for use in heat pumps
US6409807B1 (en) 2000-05-23 2002-06-25 Litton Systems, Inc. Linear gas valve cycle control, shut-off-valve and self test
EP1371889A3 (en) * 2002-06-13 2004-02-11 TGK Co., Ltd. Three-way switching valve
US6883545B2 (en) 2002-06-13 2005-04-26 Tgk Co., Ltd. Three-way switching valve
CN100395453C (zh) * 2003-09-19 2008-06-18 三星电子株式会社 可变容量旋转式压缩机
CN100342139C (zh) * 2003-09-30 2007-10-10 三星电子株式会社 可变容量旋转压缩机
CN100346074C (zh) * 2003-09-30 2007-10-31 三星电子株式会社 变容旋转压缩机
CN101319734B (zh) * 2007-06-04 2010-09-22 浙江三花制冷集团有限公司 四通换向阀之活塞连杆
US20110088427A1 (en) * 2008-06-12 2011-04-21 Yutaka Ishii Control Valve and Air Conditioner Equipped with the Valve
US20100307607A1 (en) * 2009-06-04 2010-12-09 James Glenn Ary Reversing valve
US8505580B2 (en) 2009-06-04 2013-08-13 Parker-Hannifin Corporation Reversing valve
CN101666386B (zh) * 2009-09-18 2012-01-18 清华大学 一种自力式三通阀
CN102954243A (zh) * 2011-08-29 2013-03-06 浙江三花制冷集团有限公司 大型四通换向阀及其滑块部件
CN104634010A (zh) * 2014-12-31 2015-05-20 浙江陆特能源科技股份有限公司 制冷制热切换管路的施工工艺及其切换系统
CN104634010B (zh) * 2014-12-31 2018-02-16 浙江陆特能源科技股份有限公司 制冷制热切换管路的施工工艺及其切换系统
CN106032846A (zh) * 2015-03-17 2016-10-19 浙江盾安禾田金属有限公司 自力式三通阀及其空调系统
CN106032846B (zh) * 2015-03-17 2019-12-24 浙江盾安禾田金属有限公司 自力式三通阀及其空调系统
US20180299173A1 (en) * 2015-05-14 2018-10-18 Jhejiang Sanhua Climate And Appliance Controls Group., Ltd. Reversing valve and cooling system having same
US10619897B2 (en) * 2015-05-14 2020-04-14 Zhejiang Sanhua Climate And Appliance Controls Group., Ltd Reversing valve and cooling system having same
CN106763894A (zh) * 2015-11-24 2017-05-31 株式会社鹭宫制作所 切换阀以及冷冻循环
CN106763894B (zh) * 2015-11-24 2019-09-13 株式会社鹭宫制作所 切换阀以及冷冻循环系统
CN107237900A (zh) * 2016-03-29 2017-10-10 珠海华宇金属有限公司 一种板弹簧及四通换向阀
US10907748B2 (en) * 2016-03-30 2021-02-02 Ckd Corporation Flow path switching valve and manufacturing method therefor
US11566723B2 (en) 2016-03-30 2023-01-31 Ckd Corporation Flow path switching valve and manufacturing method therefor
CN108253669A (zh) * 2016-12-29 2018-07-06 杭州三花研究院有限公司 多通换向装置及空调系统
CN108253669B (zh) * 2016-12-29 2021-10-19 杭州三花研究院有限公司 多通换向装置及空调系统
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Also Published As

Publication number Publication date
JPS50127232A (enrdf_load_stackoverflow) 1975-10-07
IT1034264B (it) 1979-09-10
ES435623A1 (es) 1976-12-16
DE2511370A1 (de) 1975-09-18
FR2264234A1 (enrdf_load_stackoverflow) 1975-10-10

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