US20030010832A1 - Reducing flow noise in a refrigerant expansion valve - Google Patents
Reducing flow noise in a refrigerant expansion valve Download PDFInfo
- Publication number
- US20030010832A1 US20030010832A1 US09/904,217 US90421701A US2003010832A1 US 20030010832 A1 US20030010832 A1 US 20030010832A1 US 90421701 A US90421701 A US 90421701A US 2003010832 A1 US2003010832 A1 US 2003010832A1
- Authority
- US
- United States
- Prior art keywords
- valve
- inlet
- valve member
- disposing
- diffuser
- 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.)
- Abandoned
Links
- 239000003507 refrigerant Substances 0.000 title abstract description 7
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 claims 2
- 238000011144 upstream manufacturing Methods 0.000 claims 1
- 239000002775 capsule Substances 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 230000000717 retained effect Effects 0.000 description 4
- 241000239290 Araneae Species 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000036316 preload Effects 0.000 description 1
- 230000000135 prohibitive effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Images
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
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0644—One-way valve
- F16K31/0655—Lift valves
-
- 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
- F16K47/00—Means in valves for absorbing fluid energy
- F16K47/08—Means in valves for absorbing fluid energy for decreasing pressure or noise level and having a throttling member separate from the closure member, e.g. screens, slots, labyrinths
-
- 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
- F25B41/24—Arrangement of shut-off valves for disconnecting a part of the refrigerant cycle, e.g. an outdoor part
-
- 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
- F25B41/34—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators
-
- 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
- F25B2341/067—Expansion valves having a pilot valve
-
- 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
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Definitions
- the present invention relates to refrigerant expansion valves of the type typically operated by a thermally responsive sensor such as a fluid filled capsule and which employ in combination an electrically operated shutoff valve at the inlet of the expansion valve.
- Valves of this type are commonly employed in motor vehicle passenger compartment air conditioning systems where high ambient thermal load gradients are encountered and rapid changes in refrigerant flow are often required to maintain passenger comfort.
- a known combination thermal expansion valve and electrically operated inlet shutoff valve is indicated generally at 1 and includes a solenoid operator indicated generally at 2 attached to the valve block of a thermal expansion valve indicated generally at 3 .
- the valve block 4 has an inlet 5 and an outlet 6 with a expansion valve member 7 therebetween which is moveable by an operating member 8 . It will be understood that the operating member 8 is moved by a thermally responsible sensing unit or capsule (not shown) as is well known in the art of automotive refrigerant expansion valves.
- a riser passage 9 communicates the flow from inlet 5 through a spider clip 10 and the inner periphery of a sealing washer 11 which retains a valve seat member 12 in the block.
- Valve seat member 12 defines an inlet valve seat 13 against which is moved a shutoff valve member 14 , which in turn is moved by an armature 15 forming part of the solenoid operator 2 which includes a solenoid coil 16 surrounding the armature 15 .
- a pilot passage 18 is formed in the shutoff valve member 18 with a pilot valve member 19 seated on the upper end thereof.
- the present invention provides a combination refrigerant expansion valve, of the type intended to be operated by a thermally responsive unit, in combination with an electrically operated inlet shutoff valve.
- the valve assembly of the present invention employs an expansion valve member operating against a valve seat in a valve block; and, the valve member is retained on the valve seat and moved with respect to the valve seat by an operating rod or member of the type intended to be connected to a thermally responsive sensing capsule.
- a shutoff valve seat member is received over the retainer for the expansion valve; and, a shutoff valve member is disposed thereagainst and moved with respect to the shutoff valve seat by the armature of a solenoid attached to the valve body.
- the shutoff valve seat has a diffuser disposed adjacent and surrounding its valve seat, which serves to direct the flow to the valve seat and reduce flow noise.
- the diffuser comprises a plurality of radially outwardly extending flow channels which direct the flow from a riser passage in the valve block communicating with the valve inlet.
- the valve seat member and diffuser channels are formed integrally in a one piece, preferably cup-shaped member.
- the present invention thus provides a unique and novel construction for an electrically operated inlet shutoff valve in combination with a thermal expansion valve and which is relatively low in manufacturing costs, easy to assemble and eliminates undesirable flow noise.
- FIG. 1 is a cross-section of the combination valve assembly of the present invention showing the expansion valve and solenoid operated inlet shutoff valve;
- FIG. 2 is an enlarged perspective view of the inlet shutoff valve seat of the embodiment of FIG. 1;
- FIG. 3 is a view similar to FIG. 1 of a prior art valve assembly.
- the combination valve assembly of the present invention is indicated generally at 20 and includes an electrically energizable solenoid operator indicated generally at 22 attached to an expansion valve indicated generally at 24 .
- the valve 24 has a valve block 26 with a high pressure inlet passage 28 formed therein which communicates with a riser passage 30 .
- the valve block 26 has a moveable expansion valve member 32 disposed therein against a valve seat 34 ; and, the block has an outlet 36 which communicates with the valve seat via a passage 38 .
- the expansion valve member 32 is moved by an operating member or rod 40 which is intended for connection to a thermally responsive sensor (not shown) such as a fluid filled temperature sensing capsule well known in the art.
- a thermally responsive sensor such as a fluid filled temperature sensing capsule well known in the art.
- the expansion valve member 32 preferably in the form of a spherical member, is biased to the closed position against seat 34 by a cap 42 which is contacted by the lower end of a spring 44 which has its upper end registered against the end of a counter bore formed in an annular retainer 46 which threadedly engages the block as denoted by reference numeral 48 .
- Retainer 46 is rotatable in the threads 48 for adjusting the preload of spring 44 on the expansion valve member 32 .
- the member 46 has a central passage therethrough denoted by reference numeral 50 which communicates with the expansion valve seat 34 .
- An inlet shutoff valve seat member 52 having a generally cup-shaped configuration is received over the spring retainer 46 and sealed thereover by a seal ring 50 .
- Shutoff valve seat member 52 has a passage 56 formed in the upper end thereof which communicates with an inlet shutoff valve seat 58 formed on the upper end of member 52 and which is contacted by the lower end of a shutoff valve member 60 .
- Valve member 60 is slidably received in a bore 62 formed in the lower end of an armature 64 which is slidably retained in a tubular armature guide member 66 which has an enlarged diameter portion 68 which opens in a radially outwardly extending annular flange 70 .
- the armature guide member flange 70 is retained in the valve block 26 by a collar 72 threaded in the valve block and bearing against the flange 70 .
- the interior of the enlarged portion 68 of the armature guide 66 forms an annular chamber 71 about member 52 , which chamber 71 is in open communication with riser passage 54 .
- the shutoff valve member 60 has a pilot passage 74 provided therethrough which has a pilot valve member 76 seated thereon and biased downwardly against the upper end of the pilot passage 74 by a spring 78 which has its upper end registered against a pole piece 80 secured to the upper end of the armature guide in a fluid type arrangement as, for example, by weldment or interference fit.
- Armature 64 forms a working air gap 82 at its upper end with the lower surface of the pole piece 80 .
- a coil bobbin 84 with a coil 86 wound thereon is received over the armature guide and retained thereon by a cap 88 secured by a clip 90 pressed over the pole piece 80 .
- a cylindrical casing 92 is received over the coil for completing a flux loop thereabout.
- An annular inner flux collector member 94 is provided over the armature guide within the bobbin at the lower end thereof in the presently preferred construction.
- the coil 86 causes the armature to move upwardly closing air gap 82 and lifting the pilot valve member 76 causing flow from above the main valve member to exit through the pilot passage 74 thereby reducing the pressure on the upper end of the armature whereupon pressure forces acting on the lower end of the armature aid in lifting the shutoff valve member 60 from valve seat 58 .
- fluid flows through riser passage 30 and around the valve seat member 52 over valve seat 58 and through passage 56 through passage 50 in retainer 46 to the expansion valve 32 .
- the shutoff valve seat member 52 is shown with a diffuser indicated generally at 96 which includes a plurality of radially extending channels 98 , 100 , 102 , 104 formed in the upper end of the member 52 and feeding to the inlet side of the valve seat surface 58 .
- the channels 98 , 100 , 102 , 104 diffuse the flow and tend to reduce turbulence and serve to eliminate undesirable flow noise.
- the diffuser 96 is shown in the form of radial channels or grooves formed in the upper end of the member 52 in a unitary one-piece arrangement, it will be understood that the diffuser may be configured otherwise where, for example, channels 96-102 may be formed as bores and may alternatively be formed in a separate member from member 52 .
- the present invention thus provides a unique and novel combination of a thermal expansion valve and electrically operated inlet shutoff valve having a diffuser on the inlet side of the shutoff valve seat to reduce flow noise.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Details Of Valves (AREA)
- Magnetically Actuated Valves (AREA)
- Lift Valve (AREA)
Abstract
Description
- The present invention relates to refrigerant expansion valves of the type typically operated by a thermally responsive sensor such as a fluid filled capsule and which employ in combination an electrically operated shutoff valve at the inlet of the expansion valve. Valves of this type are commonly employed in motor vehicle passenger compartment air conditioning systems where high ambient thermal load gradients are encountered and rapid changes in refrigerant flow are often required to maintain passenger comfort.
- Heretofore, such combination thermally operated expansion valves with an electrically operated inlet shutoff valve have experienced problems of flow noise and particularly high frequency noise characterized as “hissing” which has been found to be unacceptable from the standpoint of the vehicle occupants.
- Referring to FIG. 3, a known combination thermal expansion valve and electrically operated inlet shutoff valve is indicated generally at1 and includes a solenoid operator indicated generally at 2 attached to the valve block of a thermal expansion valve indicated generally at 3. The valve block 4 has an
inlet 5 and anoutlet 6 with aexpansion valve member 7 therebetween which is moveable by an operating member 8. It will be understood that the operating member 8 is moved by a thermally responsible sensing unit or capsule (not shown) as is well known in the art of automotive refrigerant expansion valves. - A riser passage9 communicates the flow from
inlet 5 through aspider clip 10 and the inner periphery of a sealing washer 11 which retains avalve seat member 12 in the block. Valveseat member 12 defines aninlet valve seat 13 against which is moved ashutoff valve member 14, which in turn is moved by anarmature 15 forming part of thesolenoid operator 2 which includes asolenoid coil 16 surrounding thearmature 15. Apilot passage 18 is formed in theshutoff valve member 18 with apilot valve member 19 seated on the upper end thereof. The prior art valve assembly shown in FIG. 3 has been found to exhibit a prohibitive amount of flow noise which is generated in the region of thespider clip 10 and washer 11 which are registered against the shoulder formed in thearmature guide 17. - Accordingly, it has been desired to find a way or means of providing a refrigerant expansion valve operated by a thermally responsive member in combination with an electrically operated inlet shutoff valve which is relatively low in manufacturing cost, easy to assemble and reduces undesirable flow noise and particularly hissing. It has further been desired to provide such a combination valve which has reduced flow noise and which is sufficiently low in manufacturing cost to be suitable for high volume mass production of motor vehicle air conditioning systems.
- The present invention provides a combination refrigerant expansion valve, of the type intended to be operated by a thermally responsive unit, in combination with an electrically operated inlet shutoff valve. The valve assembly of the present invention employs an expansion valve member operating against a valve seat in a valve block; and, the valve member is retained on the valve seat and moved with respect to the valve seat by an operating rod or member of the type intended to be connected to a thermally responsive sensing capsule.
- A shutoff valve seat member is received over the retainer for the expansion valve; and, a shutoff valve member is disposed thereagainst and moved with respect to the shutoff valve seat by the armature of a solenoid attached to the valve body. The shutoff valve seat has a diffuser disposed adjacent and surrounding its valve seat, which serves to direct the flow to the valve seat and reduce flow noise. In the preferred embodiment, the diffuser comprises a plurality of radially outwardly extending flow channels which direct the flow from a riser passage in the valve block communicating with the valve inlet. In the presently preferred practice the valve seat member and diffuser channels are formed integrally in a one piece, preferably cup-shaped member.
- The present invention thus provides a unique and novel construction for an electrically operated inlet shutoff valve in combination with a thermal expansion valve and which is relatively low in manufacturing costs, easy to assemble and eliminates undesirable flow noise.
- FIG. 1 is a cross-section of the combination valve assembly of the present invention showing the expansion valve and solenoid operated inlet shutoff valve;
- FIG. 2 is an enlarged perspective view of the inlet shutoff valve seat of the embodiment of FIG. 1; and,
- FIG. 3 is a view similar to FIG. 1 of a prior art valve assembly.
- Referring to FIG. 1, the combination valve assembly of the present invention is indicated generally at20 and includes an electrically energizable solenoid operator indicated generally at 22 attached to an expansion valve indicated generally at 24. The
valve 24 has avalve block 26 with a highpressure inlet passage 28 formed therein which communicates with a riser passage 30. Thevalve block 26 has a moveableexpansion valve member 32 disposed therein against avalve seat 34; and, the block has anoutlet 36 which communicates with the valve seat via apassage 38. - The
expansion valve member 32 is moved by an operating member orrod 40 which is intended for connection to a thermally responsive sensor (not shown) such as a fluid filled temperature sensing capsule well known in the art. - The
expansion valve member 32, preferably in the form of a spherical member, is biased to the closed position againstseat 34 by acap 42 which is contacted by the lower end of aspring 44 which has its upper end registered against the end of a counter bore formed in anannular retainer 46 which threadedly engages the block as denoted byreference numeral 48.Retainer 46 is rotatable in thethreads 48 for adjusting the preload ofspring 44 on theexpansion valve member 32. Themember 46 has a central passage therethrough denoted byreference numeral 50 which communicates with theexpansion valve seat 34. - An inlet shutoff
valve seat member 52 having a generally cup-shaped configuration is received over thespring retainer 46 and sealed thereover by aseal ring 50. Shutoffvalve seat member 52 has apassage 56 formed in the upper end thereof which communicates with an inletshutoff valve seat 58 formed on the upper end ofmember 52 and which is contacted by the lower end of ashutoff valve member 60. - Valve
member 60 is slidably received in abore 62 formed in the lower end of anarmature 64 which is slidably retained in a tubulararmature guide member 66 which has an enlargeddiameter portion 68 which opens in a radially outwardly extendingannular flange 70. The armatureguide member flange 70 is retained in thevalve block 26 by acollar 72 threaded in the valve block and bearing against theflange 70. - The interior of the enlarged
portion 68 of thearmature guide 66 forms anannular chamber 71 aboutmember 52, whichchamber 71 is in open communication withriser passage 54. In the presently preferred practice, theshutoff valve member 60 has apilot passage 74 provided therethrough which has apilot valve member 76 seated thereon and biased downwardly against the upper end of thepilot passage 74 by aspring 78 which has its upper end registered against apole piece 80 secured to the upper end of the armature guide in a fluid type arrangement as, for example, by weldment or interference fit. -
Armature 64 forms a workingair gap 82 at its upper end with the lower surface of thepole piece 80. Acoil bobbin 84 with acoil 86 wound thereon is received over the armature guide and retained thereon by acap 88 secured by aclip 90 pressed over thepole piece 80. Acylindrical casing 92 is received over the coil for completing a flux loop thereabout. An annular inner flux collector member 94 is provided over the armature guide within the bobbin at the lower end thereof in the presently preferred construction. - Upon energization, the
coil 86 causes the armature to move upwardly closingair gap 82 and lifting thepilot valve member 76 causing flow from above the main valve member to exit through thepilot passage 74 thereby reducing the pressure on the upper end of the armature whereupon pressure forces acting on the lower end of the armature aid in lifting theshutoff valve member 60 fromvalve seat 58. Upon lifting of theshutoff valve member 60 fromvalve seat 58, fluid flows through riser passage 30 and around thevalve seat member 52 overvalve seat 58 and throughpassage 56 throughpassage 50 inretainer 46 to theexpansion valve 32. - Referring to FIG. 2, the shutoff
valve seat member 52 is shown with a diffuser indicated generally at 96 which includes a plurality of radially extendingchannels member 52 and feeding to the inlet side of thevalve seat surface 58. Thus, thechannels diffuser 96 is shown in the form of radial channels or grooves formed in the upper end of themember 52 in a unitary one-piece arrangement, it will be understood that the diffuser may be configured otherwise where, for example, channels 96-102 may be formed as bores and may alternatively be formed in a separate member frommember 52. - The present invention thus provides a unique and novel combination of a thermal expansion valve and electrically operated inlet shutoff valve having a diffuser on the inlet side of the shutoff valve seat to reduce flow noise.
- Although the invention has hereinabove been described with respect to the illustrated embodiments, it will be understood that the invention is capable of modification and variation and is limited only by the following claims.
Claims (8)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/904,217 US20030010832A1 (en) | 2001-07-12 | 2001-07-12 | Reducing flow noise in a refrigerant expansion valve |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/904,217 US20030010832A1 (en) | 2001-07-12 | 2001-07-12 | Reducing flow noise in a refrigerant expansion valve |
Publications (1)
Publication Number | Publication Date |
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US20030010832A1 true US20030010832A1 (en) | 2003-01-16 |
Family
ID=25418788
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/904,217 Abandoned US20030010832A1 (en) | 2001-07-12 | 2001-07-12 | Reducing flow noise in a refrigerant expansion valve |
Country Status (1)
Country | Link |
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US (1) | US20030010832A1 (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20050056034A1 (en) * | 2003-09-11 | 2005-03-17 | Tgk Co., Ltd. | Flow-regulating expansion valve |
US20130074536A1 (en) * | 2010-04-16 | 2013-03-28 | Jugurtha BENOUALI | Thermostatic Expansion Device And Air Conditioning Loop Comprising Such A Thermostatic Expansion Device |
US20150052923A1 (en) * | 2012-04-09 | 2015-02-26 | Daikin Industries, Ltd. | Air conditioner |
CN104457049A (en) * | 2013-09-13 | 2015-03-25 | 盾安环境技术有限公司 | Double-direction expansion valve and flow control method thereof |
EP2998626A1 (en) * | 2014-09-19 | 2016-03-23 | Danfoss A/S | Solenoid valve |
US20180363961A1 (en) * | 2017-06-14 | 2018-12-20 | Hitachi-Johnson Controls Air Conditioning, Inc. | Air conditioner |
US10330214B2 (en) * | 2016-09-02 | 2019-06-25 | Fujikoki Corporation | Control valve |
-
2001
- 2001-07-12 US US09/904,217 patent/US20030010832A1/en not_active Abandoned
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20050056034A1 (en) * | 2003-09-11 | 2005-03-17 | Tgk Co., Ltd. | Flow-regulating expansion valve |
US20130074536A1 (en) * | 2010-04-16 | 2013-03-28 | Jugurtha BENOUALI | Thermostatic Expansion Device And Air Conditioning Loop Comprising Such A Thermostatic Expansion Device |
US9459030B2 (en) * | 2010-04-16 | 2016-10-04 | Valeo Systemes Thermiques | Thermostatic expansion device and air conditioning loop comprising such a thermostatic expansion device |
US20150052923A1 (en) * | 2012-04-09 | 2015-02-26 | Daikin Industries, Ltd. | Air conditioner |
CN104457049A (en) * | 2013-09-13 | 2015-03-25 | 盾安环境技术有限公司 | Double-direction expansion valve and flow control method thereof |
EP2998626A1 (en) * | 2014-09-19 | 2016-03-23 | Danfoss A/S | Solenoid valve |
WO2016041650A1 (en) * | 2014-09-19 | 2016-03-24 | Danfoss A/S | Solenoid valve |
CN106687729A (en) * | 2014-09-19 | 2017-05-17 | 丹佛斯有限公司 | Solenoid valve |
RU2666687C1 (en) * | 2014-09-19 | 2018-09-11 | Данфосс А/С | Electromagnetic valve |
US10082219B2 (en) | 2014-09-19 | 2018-09-25 | Danfoss A/S | Solenoid valve |
US10330214B2 (en) * | 2016-09-02 | 2019-06-25 | Fujikoki Corporation | Control valve |
US20180363961A1 (en) * | 2017-06-14 | 2018-12-20 | Hitachi-Johnson Controls Air Conditioning, Inc. | Air conditioner |
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Legal Events
Date | Code | Title | Description |
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AS | Assignment |
Owner name: EATON CORPORATION, OHIO Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:KRAMER, DAVID J.;SPRYSHAK, JOE J.;REEL/FRAME:012010/0707 Effective date: 20010706 |
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AS | Assignment |
Owner name: PARKER-HANNIFIN CORPORATION, OHIO Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:EATON CORPORATION;REEL/FRAME:012199/0451 Effective date: 20010905 |
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AS | Assignment |
Owner name: PARKER-HANNIFIN CORPORATION, OHIO Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:EATON CORPORATON;REEL/FRAME:012665/0354 Effective date: 20010905 |
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STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO PAY ISSUE FEE |