EP0061104A2 - Einrichtung zum Einstellen des Kältemittelstromes in einer Vorrichtung zum Kühlen oder Erwärmen und Verfahren zum Regeln eines solchen Kältemittelstromes - Google Patents

Einrichtung zum Einstellen des Kältemittelstromes in einer Vorrichtung zum Kühlen oder Erwärmen und Verfahren zum Regeln eines solchen Kältemittelstromes Download PDF

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Publication number
EP0061104A2
EP0061104A2 EP82102038A EP82102038A EP0061104A2 EP 0061104 A2 EP0061104 A2 EP 0061104A2 EP 82102038 A EP82102038 A EP 82102038A EP 82102038 A EP82102038 A EP 82102038A EP 0061104 A2 EP0061104 A2 EP 0061104A2
Authority
EP
European Patent Office
Prior art keywords
refrigerating fluid
refrigerating
fact
regulation
capillary tube
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.)
Granted
Application number
EP82102038A
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English (en)
French (fr)
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EP0061104A3 (en
EP0061104B1 (de
Inventor
Luigi Alluto
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.)
Whirlpool EMEA SpA
Original Assignee
Indesit Industria Elettrodomestici Italiana SpA
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
Priority claimed from IT5304581U external-priority patent/IT8153045V0/it
Priority claimed from IT5333681U external-priority patent/IT8153336V0/it
Application filed by Indesit Industria Elettrodomestici Italiana SpA filed Critical Indesit Industria Elettrodomestici Italiana SpA
Publication of EP0061104A2 publication Critical patent/EP0061104A2/de
Publication of EP0061104A3 publication Critical patent/EP0061104A3/en
Application granted granted Critical
Publication of EP0061104B1 publication Critical patent/EP0061104B1/de
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B5/00—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity
    • F25B5/04—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity arranged in series
    • 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

Definitions

  • the present invention refers to a contrivance for the adjustment of the refrigerating fluid-flow in an apparatus for the production of cold or hot conditions, and to a regulating system of the refrigerating fluid in a refrigerator comprizing at least two rafrigeratirg cells evidencing different temperatures, each of which is cooled through an evaporator through which the refrigerating fluid is flowing, one of the said cells being meant for fresh food, whilst the other is intended for frozen food, further a condenser for the condensation of refrigerating fluid from the compressor and a system of capillary tubes for the transfer of the refrigerating fluid from the condenser to the evaporators.
  • This capillary device evidences however some weak sides, which are essentially due to its scarce flexibility and adaptability to the different load conditions and to the different ambient temperature.
  • some refrigerating fluid in liquid conditions this determines a considerable lowering of the refrigerator's performance and also the building up of hoarfrost on the backflowpiping of the refrigerating flow returning to the compressor; it could even occur that some liquid penetrates into the compressor, damaging it.
  • an independent functioning of the two cells can be obtained through two- three- or four-way valves of the electro- magnetic kind, connected in the refrigerating circuit and allowing the passing through, the stopping or the deviation of the refrigerating fluid in the two evaporators.
  • the present invention aims therefore at the overcoming of the above drawbacks by building a contrivance for the regulation of the fluid flow in a refrigerating circuit at a very low cost, whilst in case of damage to the electrical component of the device (coil) this can be easily replaced without damaging the circuit of the refrigerating fluid.
  • Another scope of the present invention consists in setting up a refrigerating combined apparatus or a two doors one, in which the operation of the two cells used for cooling purposes is to be substantially independent, whilst the regulating system of the refrigerating fluid is in conditions to warrant the re-balancing of the pressures of the refrigerating fluid without degrading the evaporators.
  • the device is finally to be notably money sparing through the use of electric valves having a low cost level.
  • the present invention proposes a contrivance for the regulation of the flow of a refrigerating fluid in an apparatus for the production of cold or heat, characterized by the fact that it comprizes rather simple and economic means for the regulation of said flow, said means including an electro magnetic valve inserted into a capillary tube forming part of the circuit of the refrigerating fluid and said electro-magne tic valve comprizing a movable component for the regulation of said flow, the position of which is controlled through an electric pulse addressed to the coil of said valve and through the fluid pressure inside the capillary tube.
  • FIG 1 appears a cross section of the first realization of the above mentioned contrivance forming the subject of the present invention
  • the figure 2 appears schematically a refrigerator arranged according to the regulating system of the refrigerating fluid subject of the present invention and applying the device mentioned before and appearing on fig.1
  • the figure 3 there appears a cross section of a second form of realization of the contrivance covered by the present invention.
  • a cylindrical copper container 11 is shown, with two apertures 12 and 14 opened in its end portions.
  • a first part 13' of a capillary tube 13 is inserted and welded , from which the refrigerating fluid flows into the evaporator.
  • a second part of the same canillary tube 13 is inserted end welded; it is bent so as to adhere t the container 11 and to remain parallel to the first part 13' of the capillary tube; from this part 15 arrives the refrigerating fluid proceeding from the condenser.
  • a coil 16 is arranged, fed by a continuous electric voltage.
  • a continuous regulation of the refrigerating fluid flow can be obtained by using the contrivance appearing on figure 3, slightly different from that of figure 1, where parts of capillary tubes 13' and 15 are exchanged in respect of the end connections with the container 11.
  • Part 15 throuth which arrives the fluid proceeding from the condenser is welded to the glower aperture of the container 11, whilst the part 13' through which fluid flows to the evaporator is welded to the upper aperture of the container 11.
  • the coil 16 is arranged around the lower area of the container 11 and the hole 18' cut into the circular partition 17 assumes the form of a truncated cone whilst the bit 20 of the core 19 is adequately made of nylon.
  • the displacement of the iron core 19 and of its bit 20, and therefore the size of the occlusion of the hole 18' are a function of the quantity of current circulating through the coil 16, so that by varying continuously such a current, one can vary with the same precision said aperture of hole 18'.
  • the size of the capillary tube 13 and of the 'capillary type 3 and on the opending of said hole 18' one can obtain an exact regulation of ⁇ he flow of the refrigerating fluid which never lowers to nought due to the considerable contrary force exerted by the refrigerating fluid in regard to the core 19 against which the flow is striking.
  • the different shape of the two holes ( is cylindrical and 18' has the form of a truncated cone) has its importance, because the shape of a truncated cone although useful in the instance of the figure 3 for an "analogue" regulation of the flow, is no longer applicable in the case of figure 1 for a "digital” regulation of same, in view of the fact that the faying surface between bit 20 and hole 1 8 would be then so large that extremely strong currents should be fed to the oil 16 to obtain a disjuction between such two components. It is therefore usefull to have in this case a small faying or contact surface between such components through a cylindrical hole 18.
  • a compressor 1 a condenser 2 connected to the outlet of compressor 1, a de- 1 hydrating strainer for the refrigerting fluid 3 on the outlet of ne condenser 2, a first capillary tube 4F (diameter 0,70 mm, length 2800 mm) connected with the dehydrating strainer 3, a first electrovalve with a removable coil 5F (like that on fig.
  • first capillary tube 4F which is appropriately interrupted, a first evaporator 6F connected with the capillary tube 4F, a second capillary tube 4C.(diameter 0,70 mm, length 3200 mm) connected with the dehydrating strainer 3, a second electrovalve with removable coil 5C, just as on figure 1, inserted into the second capillary tube 4C, appropriately interrupted, a second evaporator 6C, the inlet of which is connected with the outlet of the first evaporator 6F and the second capillary tube 4C, and a return flue 7 connecting the outlet of the second evaporator 6C with the input of the compressor 1.
  • the functioning of the refrigerating assembly is carried out by a thermostatic circuit which does not appear on figure and is as follows: when both cells require cold, the compressor 1 starts to function, the electrovalve 5F remains open , the electro valve 5C is closed . In this way the refrigerating fluid can circulate in both evaporators 6F and 6C and is cooling both cells.
  • compressor 1 When only one cell (that for frozen food) needs cold, compressor 1 is always in operation, while the electrovalve 5F is closed and the electrovalve 6F is open. In this way no refrigerating fluid is circulating in the evaporator 6F and the fresh food . cell is not cooled, while the circulation of refrigerating fluid in the caanoretor 6C cols the cell c maining frozen food. Irie- diately after the stopping of the connerssor 1, the thermostatic circuit opens both electrovalves 5F and 5C and allows a quick re-balancing of the pressures of refrigerating fluid, thus avoiding the degrading of the evaporators 6F and 6C.
  • said thermostatic circuit can open the first electrovalve 5F and close the second one 5C; in this way the re-balancing of the pressures of the refrigerating fluid is not occurring very rapidly but the whole of the outer heat is scattered on the evaporator of the cell for fresh food 6F, which is not worsening the operation because it finds itself in a phase of defrosting.
  • the electrovalve forming the subject of the present invention may replace with the same performance an electrovalve of the known two-ways type, while two of the same electrovalves connected as per figure 2 may replace a three-ways electrovalve of a known type. It may even be added that this arrangement is advantageous as against the three-ways electrovalve because the latter can have only two positions (way A open and way B closed and way Adosed and way B open, which can be indicated by symbols 01 and 10).
  • the two electrovalves 5F and 5C connected as shown allow four combinations viz. : 5F closed-5C closed, 5F closed-5C open, 5F open-5C closed, 5F open-5C open which can be indicated as 00,01,10,11 and through which one can obtain a performance flexibility which is not obtainable with a three-ways electrovalve
  • the capillary tube may be wanting in the relevant electrovalve (4C being the tube and 5C the electrovalve) so that there remains only the capillary tube 4F, with an appropriate size and in which electrovalve 5F is inserted (its type being the same of that appearing on figure 3): the regulation in this case is of the "analogue" kind.
  • the electrovalve 5F finds itself in the maximum opening conditions and the flow of refrigerating fluid is at a maximum level with an efficiency able to cool both cells.
  • the fresh food cell in connection with evaporator 6C
  • the frozen food cell connected with evaporator 6F

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
EP82102038A 1981-03-24 1982-03-13 Einrichtung zum Einstellen des Kältemittelstromes in einer Vorrichtung zum Kühlen oder Erwärmen und Verfahren zum Regeln eines solchen Kältemittelstromes Expired EP0061104B1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
IT5304581U 1981-03-24
IT5304581U IT8153045V0 (it) 1981-03-24 1981-03-24 Dispositivo per la regolazione del la portata del fluido frigorifero in un apparecchio per la produzione del freddo o del caldo
IT5333681U 1981-06-09
IT5333681U IT8153336V0 (it) 1981-06-09 1981-06-09 Perfezionamento di un apparecchio frigorifero

Publications (3)

Publication Number Publication Date
EP0061104A2 true EP0061104A2 (de) 1982-09-29
EP0061104A3 EP0061104A3 (en) 1982-11-24
EP0061104B1 EP0061104B1 (de) 1986-09-10

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP82102038A Expired EP0061104B1 (de) 1981-03-24 1982-03-13 Einrichtung zum Einstellen des Kältemittelstromes in einer Vorrichtung zum Kühlen oder Erwärmen und Verfahren zum Regeln eines solchen Kältemittelstromes

Country Status (2)

Country Link
EP (1) EP0061104B1 (de)
DE (1) DE3273098D1 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3441251A1 (de) * 1984-11-12 1986-05-22 Danfoss A/S, Nordborg Ventil fuer leicht verdampfbare fluessigkeiten, insbesondere expansionsventil fuer kaelteanlagen
EP0246465A1 (de) * 1986-05-20 1987-11-25 INDUSTRIE ZANUSSI S.p.A. Kältemittelkreislauf mit Drehverdichter
EP0066553B1 (de) * 1981-05-15 1989-05-31 INDESIT S.r.l. Steuerungssystem zum Verbessern der Leistung von Heiz- oder Kühlgeräten
WO2015014718A1 (de) * 2013-08-02 2015-02-05 BSH Bosch und Siemens Hausgeräte GmbH Magnetventil und dieses verwendende kältemaschine
WO2015014795A1 (de) * 2013-08-02 2015-02-05 BSH Bosch und Siemens Hausgeräte GmbH Magnetventil und dieses verwendende kältemaschine

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2471137A (en) * 1947-04-22 1949-05-24 Gen Electric Two-temperature refrigerating system
US2607368A (en) * 1949-07-01 1952-08-19 Tappan Stove Co Solenoid operated valve
FR1074171A (fr) * 1953-02-11 1954-10-04 Regulation Automatique Vanne électro-magnétique
US2697331A (en) * 1952-09-13 1954-12-21 Philco Corp Refrigeration apparatus with plural evaporators and refrigerant flow control
US2791099A (en) * 1953-02-27 1957-05-07 Wayne D Jordan Control system for multi-temperature refrigerators
FR1496184A (fr) * 1966-08-16 1967-09-29 Air Liquide Vanne actionnée électromagnétiquement
FR1569445A (de) * 1968-06-24 1969-05-30
DE2035207A1 (de) * 1970-07-16 1972-01-27 Aeg Anordnung zur Temperaturregelung in Zwei-Temperaturbereich-Kühlschränken
US3786648A (en) * 1973-03-05 1974-01-22 Gen Electric Cooling system with multiple evaporators
GB1406883A (en) * 1972-05-02 1975-09-17 Sadia Airofreeze Ltd Refrigerators
FR2392303A1 (fr) * 1977-05-24 1978-12-22 Bosch Siemens Hausgeraete Soupape electro-magnetique, notamment soupape a trois voies faisant fonction d'organe de commande d'un appareil refrigerateur a plusieurs temperatures comportant une seule machine frigorifique
GB2016128A (en) * 1978-02-23 1979-09-19 Tokyo Shibaura Electric Co Freezer unit

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2471137A (en) * 1947-04-22 1949-05-24 Gen Electric Two-temperature refrigerating system
US2607368A (en) * 1949-07-01 1952-08-19 Tappan Stove Co Solenoid operated valve
US2697331A (en) * 1952-09-13 1954-12-21 Philco Corp Refrigeration apparatus with plural evaporators and refrigerant flow control
FR1074171A (fr) * 1953-02-11 1954-10-04 Regulation Automatique Vanne électro-magnétique
US2791099A (en) * 1953-02-27 1957-05-07 Wayne D Jordan Control system for multi-temperature refrigerators
FR1496184A (fr) * 1966-08-16 1967-09-29 Air Liquide Vanne actionnée électromagnétiquement
FR1569445A (de) * 1968-06-24 1969-05-30
DE2035207A1 (de) * 1970-07-16 1972-01-27 Aeg Anordnung zur Temperaturregelung in Zwei-Temperaturbereich-Kühlschränken
GB1406883A (en) * 1972-05-02 1975-09-17 Sadia Airofreeze Ltd Refrigerators
US3786648A (en) * 1973-03-05 1974-01-22 Gen Electric Cooling system with multiple evaporators
FR2392303A1 (fr) * 1977-05-24 1978-12-22 Bosch Siemens Hausgeraete Soupape electro-magnetique, notamment soupape a trois voies faisant fonction d'organe de commande d'un appareil refrigerateur a plusieurs temperatures comportant une seule machine frigorifique
GB2016128A (en) * 1978-02-23 1979-09-19 Tokyo Shibaura Electric Co Freezer unit

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0066553B1 (de) * 1981-05-15 1989-05-31 INDESIT S.r.l. Steuerungssystem zum Verbessern der Leistung von Heiz- oder Kühlgeräten
DE3441251A1 (de) * 1984-11-12 1986-05-22 Danfoss A/S, Nordborg Ventil fuer leicht verdampfbare fluessigkeiten, insbesondere expansionsventil fuer kaelteanlagen
EP0246465A1 (de) * 1986-05-20 1987-11-25 INDUSTRIE ZANUSSI S.p.A. Kältemittelkreislauf mit Drehverdichter
WO2015014718A1 (de) * 2013-08-02 2015-02-05 BSH Bosch und Siemens Hausgeräte GmbH Magnetventil und dieses verwendende kältemaschine
WO2015014795A1 (de) * 2013-08-02 2015-02-05 BSH Bosch und Siemens Hausgeräte GmbH Magnetventil und dieses verwendende kältemaschine

Also Published As

Publication number Publication date
EP0061104A3 (en) 1982-11-24
EP0061104B1 (de) 1986-09-10
DE3273098D1 (en) 1986-10-16

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