WO1998002697A1 - Improvements in the refrigerating circuits of household and similar vapour-compression refrigeration apparatuses - Google Patents
Improvements in the refrigerating circuits of household and similar vapour-compression refrigeration apparatuses Download PDFInfo
- Publication number
- WO1998002697A1 WO1998002697A1 PCT/EP1997/003310 EP9703310W WO9802697A1 WO 1998002697 A1 WO1998002697 A1 WO 1998002697A1 EP 9703310 W EP9703310 W EP 9703310W WO 9802697 A1 WO9802697 A1 WO 9802697A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- compressor
- valve means
- household
- compressoi
- valve
- Prior art date
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
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/025—Motor control arrangements
-
- 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
- F25B2600/00—Control issues
- F25B2600/02—Compressor control
- F25B2600/025—Compressor control by controlling speed
- F25B2600/0251—Compressor control by controlling speed with on-off operation
-
- 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
- Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers
Definitions
- the piesent invention lefeis to improvements in the 1 efngeratmg cncuits of household and sirmlai l ef ⁇ geration apparatuses (refrigerators, freezeis and the bke) of the type comprising a hermetically sealed compressoi , which is driven by an electric brushless, electronically controlled motoi , and electromagnetic valve means that aie adapted to cut off the flow of the refrigerant medium upstream of the expansion device
- a well-known diawback of I efngeratmg circuits of the above mentioned kind is due to the fact that, dunng the pauses determined by the control thermostat of the appliance in the opei ation of the compiessor, part of the le ⁇ igerant medium migrates fiom the condenser (le.
- lefngei ant medium in the gaseous state is already piesent at the inlet of said capillaiy tube
- the refrigeration effect is extiemely reduced foi a certain time aftei compressor restarting.
- the motoi driving the compiessoi uses electric energy for pioducmg a 1 educed amount of lefngeiation
- Pressostatic, le piessure-sensitive valve means aie for instance known which when added directly to a refrigerating circuit, advantageously cut off the flow of refrigerant medium in the capillary tube during the thermostatically determined pauses of the compiessoi , and which are then capable of automatically restoring said flow each time that the same compiessor is restarted (see document US-A-4 267 702) Howevei , these piessostatic means due to their being of the mechanical type and requiring construction modifications, particularly in the form of welded oi mechanical joints that in all cases constitute as many potential refrigerant leakage souices, consideiably contribute to a reduction m the overall lebabibty of the l eft lgei atmg circuit
- valve means pioducing similai effects as the above cited ones are also known, which are operationally bnked with temperature sensors (see document US-A-4 286 438)
- These othei means do not lequire any modification to the lef ⁇ geiating circuits, however, the unavoidable thermal inertia and the practical difficulty in identifying a rebable position m which to locate the sensois, usually on the coils of the condensei of the lefngeiating circuit, le on the outside of the le ⁇ igeration appbance, generally pi event the opening and closing of said valve means fiom being co ⁇ ectly and lebably timed with the start and stop cycbng of the motoi dnvmg the compressoi
- Figure 1 is a block diagiam of a I efngeratmg cncuit accoiding to the present invention
- Figui e 2 is diagi ammatical view of the evolution patterns of the pressui es of the lefngeiant medium at the suction and debvery sides of the compiessor du ng a certain time of opeiation thereof
- a refngeiating circuit foi a household or sirmla lefiigeiation appaiatus compnses a hermetically sealed compressor 1 , whose shell also encloses the d vmg motoi , a condensei 2, a dehydrator-filtei 3, a capillaiy tube 4 foi the substantially lsoenthalpic expansion of the refngerant medium, and an evapoi atoi 5
- the compressoi 1 is of the type descnbed in the afoie mentioned patent EP-A-0 490 089 to the same Appbcant, le of the type dnven by a biushless motoi associated to a frequency contiol anangement 7
- Said fiequency contiol arrangement is such as to ensuie that, undei any load condition whatsoevei , the motoi is capable of operating at an automatically conti oiled lotational speed that optimizes the perfoimance of the compiessoi , said lotational speed being in all cases slowei than the lated one, detei mined by the fiequency of the powei supply system, of an equivalent induction motor of the ti aditional type
- the connection between the compressoi 1 and said frequency control arrangement 7 is established any appropriate manner, in particular through conventional electric wires 6.
- a bistable, unidirectional valve 8 of any per se known type, eg. the one described in the document IT-A-1 203 572.
- Any other type of valve may however be used, provided that it is of the type that absorbs power only in the switching transients from the closed position to the open one, and vice-versa, in order to avoid using energy unnecessarily.
- the operation of the bistable valve 8 is interlinked with the same frequency control arrangement 7 which also the operation of the motor driving the compressor 1 is actually interlinked with. Even in the case of the connection between the valve 8 and said frequency control arrangement 7, this can be estabbshed in any appropriate manner, in particular through conventional electric wires 9.
- the "downstieam” pressuie uses fiom ⁇ n initial lowei value p' e to an upper value p" ⁇ and stab ⁇ zes at such uppei value thioughout most of the period of operation 1A which teiminates at the instant Tl , when the compressor is switched off and stops operating (due to the contiol thermostat of the apparatus tripping in the well-known mannei)
- the "upstieam” pressuie deci eases rapidly from an uppei initial value p', to a sbghtly lower value p", and then remains substantially unaltered until the final instant Tl Starting from said instant Tl , and throughout the entne period of pause IB of the compiessoi (terminating with the same compressoi lestarting at the instant T2), the "downstream” pressuie decreases fiom the initial
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Positive-Displacement Pumps (AREA)
- Air Conditioning Control Device (AREA)
- Telephonic Communication Services (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP97930392A EP0912866A1 (en) | 1996-07-16 | 1997-06-24 | Improvements in the refrigerating circuits of household and similar vapour-compression refrigeration apparatuses |
JP10505543A JP2000514544A (en) | 1996-07-16 | 1997-06-24 | Improvement of refrigeration circuit in household and other vapor compression refrigeration equipment |
BR9710245A BR9710245A (en) | 1996-07-16 | 1997-06-24 | Thermofluid-dynamic circuit for domestic and similar refrigeration appliances |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT96PN000044A IT1289387B1 (en) | 1996-07-16 | 1996-07-16 | IMPROVEMENTS TO COMPRESSION REFRIGERANT CIRCUITS FOR DOMESTIC AND SIMILAR APPLIANCES |
ITPN96A000044 | 1996-07-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1998002697A1 true WO1998002697A1 (en) | 1998-01-22 |
Family
ID=11395170
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1997/003310 WO1998002697A1 (en) | 1996-07-16 | 1997-06-24 | Improvements in the refrigerating circuits of household and similar vapour-compression refrigeration apparatuses |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0912866A1 (en) |
JP (1) | JP2000514544A (en) |
BR (1) | BR9710245A (en) |
IT (1) | IT1289387B1 (en) |
WO (1) | WO1998002697A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1457744A2 (en) * | 2003-03-11 | 2004-09-15 | Linde Kältetechnik GmbH & Co.KG | (Mixed) refrigerant circuit and operating method for a (mixed) refrigerant circuit |
US8563001B2 (en) | 2008-11-05 | 2013-10-22 | Regents Of The University Of Minnesota | Multicomponent immunogenic composition for the prevention of beta-hemolytic streptococcal (BHS) disease |
WO2015086058A1 (en) * | 2013-12-11 | 2015-06-18 | Electrolux Appliances Aktiebolag | Refrigerator apparatus and method for control thereof |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1768558A (en) * | 1927-04-28 | 1930-07-01 | Frigidaire Corp | Refrigerating apparatus |
US4267702A (en) | 1979-08-13 | 1981-05-19 | Ranco Incorporated | Refrigeration system with refrigerant flow controlling valve |
US4286438A (en) | 1980-05-02 | 1981-09-01 | Whirlpool Corporation | Condition responsive liquid line valve for refrigeration appliance |
DE3709628A1 (en) * | 1986-04-09 | 1987-10-15 | Necchi Spa | Cooling system with a piston compressor |
GB2222231A (en) * | 1988-08-12 | 1990-02-28 | Brasil Compressores Sa | Blocking valve for refrigeration of air-conditioning systems |
US5023531A (en) * | 1988-05-19 | 1991-06-11 | Arx, Inc. | Dual hybrid demand refrigeration control apparatus |
EP0490089A2 (en) | 1990-12-11 | 1992-06-17 | Zanussi Elettromeccanica S.p.A. | Improvement in refrigeration compressors with electronic control arrangement |
WO1994018512A1 (en) | 1993-02-09 | 1994-08-18 | Empresa Brasileira De Compressores S/A - Embraco | Starting arrangement for small refrigeration systems |
EP0692687A2 (en) * | 1994-07-15 | 1996-01-17 | Sanyo Electric Co. Ltd | Refrigerating apparatus |
-
1996
- 1996-07-16 IT IT96PN000044A patent/IT1289387B1/en active IP Right Grant
-
1997
- 1997-06-24 EP EP97930392A patent/EP0912866A1/en not_active Withdrawn
- 1997-06-24 JP JP10505543A patent/JP2000514544A/en active Pending
- 1997-06-24 BR BR9710245A patent/BR9710245A/en not_active Application Discontinuation
- 1997-06-24 WO PCT/EP1997/003310 patent/WO1998002697A1/en not_active Application Discontinuation
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1768558A (en) * | 1927-04-28 | 1930-07-01 | Frigidaire Corp | Refrigerating apparatus |
US4267702A (en) | 1979-08-13 | 1981-05-19 | Ranco Incorporated | Refrigeration system with refrigerant flow controlling valve |
US4286438A (en) | 1980-05-02 | 1981-09-01 | Whirlpool Corporation | Condition responsive liquid line valve for refrigeration appliance |
DE3709628A1 (en) * | 1986-04-09 | 1987-10-15 | Necchi Spa | Cooling system with a piston compressor |
US5023531A (en) * | 1988-05-19 | 1991-06-11 | Arx, Inc. | Dual hybrid demand refrigeration control apparatus |
GB2222231A (en) * | 1988-08-12 | 1990-02-28 | Brasil Compressores Sa | Blocking valve for refrigeration of air-conditioning systems |
EP0490089A2 (en) | 1990-12-11 | 1992-06-17 | Zanussi Elettromeccanica S.p.A. | Improvement in refrigeration compressors with electronic control arrangement |
WO1994018512A1 (en) | 1993-02-09 | 1994-08-18 | Empresa Brasileira De Compressores S/A - Embraco | Starting arrangement for small refrigeration systems |
EP0692687A2 (en) * | 1994-07-15 | 1996-01-17 | Sanyo Electric Co. Ltd | Refrigerating apparatus |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1457744A2 (en) * | 2003-03-11 | 2004-09-15 | Linde Kältetechnik GmbH & Co.KG | (Mixed) refrigerant circuit and operating method for a (mixed) refrigerant circuit |
EP1457744A3 (en) * | 2003-03-11 | 2004-10-27 | Linde Kältetechnik GmbH & Co.KG | (Mixed) refrigerant circuit and operating method for a (mixed) refrigerant circuit |
US8563001B2 (en) | 2008-11-05 | 2013-10-22 | Regents Of The University Of Minnesota | Multicomponent immunogenic composition for the prevention of beta-hemolytic streptococcal (BHS) disease |
US9127050B2 (en) | 2008-11-05 | 2015-09-08 | Regents Of The University Of Minnesota | Multicomponent immunogenic composition for the prevention of beta-hemolytic streptococcal (BHS) disease |
WO2015086058A1 (en) * | 2013-12-11 | 2015-06-18 | Electrolux Appliances Aktiebolag | Refrigerator apparatus and method for control thereof |
Also Published As
Publication number | Publication date |
---|---|
EP0912866A1 (en) | 1999-05-06 |
ITPN960044A1 (en) | 1998-01-16 |
BR9710245A (en) | 1999-08-10 |
ITPN960044A0 (en) | 1996-07-16 |
JP2000514544A (en) | 2000-10-31 |
IT1289387B1 (en) | 1998-10-02 |
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