EP0061104B1 - Dispositif pour l'ajustement d'un écoulement de fluide réfrigérant dans un appareil de production de froid ou de chaleur et système pour régler un tel écoulement de fluide - Google Patents

Dispositif pour l'ajustement d'un écoulement de fluide réfrigérant dans un appareil de production de froid ou de chaleur et système pour régler un tel écoulement de fluide Download PDF

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Publication number
EP0061104B1
EP0061104B1 EP82102038A EP82102038A EP0061104B1 EP 0061104 B1 EP0061104 B1 EP 0061104B1 EP 82102038 A EP82102038 A EP 82102038A EP 82102038 A EP82102038 A EP 82102038A EP 0061104 B1 EP0061104 B1 EP 0061104B1
Authority
EP
European Patent Office
Prior art keywords
refrigerating
refrigerating fluid
coil
capillary tube
regulation device
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
Application number
EP82102038A
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German (de)
English (en)
Other versions
EP0061104A2 (fr
EP0061104A3 (en
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/fr
Publication of EP0061104A3 publication Critical patent/EP0061104A3/en
Application granted granted Critical
Publication of EP0061104B1 publication Critical patent/EP0061104B1/fr
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 device for the adjustment of the refrigerating fluid flow in an apparatus for the production of cold or hot conditions, and to its application in a regulating system of the refrigerating fluid in a refrigerator comprising at least two cooling cells at 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 for frozen food, a compressor for compressing the refrigerating fluid, a condenser for condensing the refrigerating fluid coming from the compressor and capillary tubes for carrying 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.
  • valves In fact, they give problems when assembled to the refrigerator, and they have to be provided with pipe fittings for the connection (or eventual disconnection in repairing operations), because it is very expensive (for the special equipment needed) to provide the welding of said expansion valve in the manufacturing stage of the refrigerator, for the delicacy of the valve. If one would directly assemble said valve to the refrigerator in its manufacturing stage, the valve should be disassembled for the welding to the parts of the refrigerator and further reassembled after the welding operation is performed, otherwise it should be provided a suitable cooling equipment.
  • the electro-magnetic valves instead could be inserted and connected in series to the refrigerating circuit as shown in U.S.A. Patent No. 2.791.099 which describes a throttling device for refrigerating fluid for a refrigerating circuit comprising a first and a second part of a tube and an element for the regulation of the flow of the refrigerating fluid connected between the two parts, the regulation element is substantially made of hollow cylinder presenting two ends to which are connected the two ends of the tube, said cylinder containing a partition presenting an orifice that determines the maximum flow of fluid through the regulation element and a movable element which is subject to a magnetic field produced by a coil that may be flowed by electric current, whose position in respect of the partition determines the quantity of refrigerating fluid passing through the regulation element; or on a branch line parallel to the evaporator (as shown in U.K.
  • an independent functioning of the two cells can be obtained through two-three or four-way valves of the electromagnetic kind, connected in the refrigerating circuit and allowing the passing through, the stopping or the deviation of the refrigerating fluid in the two evaporators (as shown in British patent No. 1.406.883 or French patent application No. 2.392.303).
  • electro- magnetic valves involve, however a relatively higher cost than the cost of simple electro- magnetic valves with a single input and output.
  • the present invention aimsto realize a device for the regulation of the fluid flow in a refrigerating circuit at a very low cost, and which could replace the expansion valve or the capillary device for the purpose of throttling, without having their disadvantages, and which in case of damage to the electrical component of the device (coil) this can be easily replaced without cutting the circuit of the refrigerating fluid.
  • the present invention proposes a refrigerating circuit comprising a first and a second part of a capillary tube and a device for the regulation of the flow of the refrigerating fluid connected between the two parts, the regulation device being substantially made of hollow container consisting of a single body, presenting two slender ends in one end of which is inserted an end of the first part of the capillary tube and in the other an end of the second part of the capillary tube, said container containing a partition presenting an orifice that determines the maximum fluid flowthrough the regulation device and a controlled movable element whose position in respect of the partition is controlled by a magnetic field produced by a coil and by the pressure of the fluid inside said capillary tube and determines the quantity of refrigerating fluid passing through the regulation device, characterized in that said coil is placed around said regulation device and is supported by a spool having a diameter greater than said container, so that during the use the coil is mounted around the container and around a part of said capillary tube at least
  • the invention also concerns an apparatus for the production of heat or cold conditions and a system for the adjustment of the refrigerating fluid flow in a refrigerating device, comprising such a refrigerating circuit.
  • 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 15 of the same capillary tube 13 is inserted and welded; it is bent so as to adhere to 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, supported by a spool 21 and fed by a continuous electric voltage.
  • coil 16 When coil 16 receives electric current, a magnetic flux is generated which in turn generates a force which attracts the iron core 19 and its bit 20 upwards, against the resistance of the pressure of the refrigerating fluid arriving from the condenser and tending to thrust such components downwards: however the attraction strength in upward direction is such that it overcomes such resistance and the final effect is an upward movement of the components mentioned above, so that they no longer obstruct the hole 18. It is to be noted that the sustentation of the core 19 by the magnetic attraction of the coil 16 is made easier through the fact that the device is inserted by cutting through the capillary tube so that same produces a decrease in the pressure exerted on the core 19 by the flow of refrigerating fluid.
  • a continuous regulation of the refrigerating fluid flow can be obtained by using the device 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 through which arrives the fluid proceeding from the condenser is welded to the lower 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 coils 16 is arranged around the lower area of the container 11 and the hole 18'cut into the circular partition 17 assumestheform of a truncated conewhilstthe 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 tube 13 and on the opening of said hole 18' one can obtain an exact regulation of the 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.
  • a compressor 1 a condenser 2 connected to the outlet of compressor 1, a dehydrating strainer for the refrigerating fluid 3 on the outlet of the 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 figure 1), inserted into the 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 capillarytube 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 conduit 7 connecting the outlet
  • 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 electrovalve 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 5C 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 evaporator 6C cools the cell containing frozen food.
  • 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 forfresh food 6F, which is not worsening the operation because it finds itself in a phase of defrosting.
  • the capillary tube 4C and the electrovalve 5C can be missing so that there remains only the capillary tube 4F (forthe cells 6F and 6C connected in series) 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 device of the present invention which comprises two portions of a capillary tube between which is connected in series an element, having a specific configuration, for the regulation of the flow of the refrigerating fluid and which realizes the function of a throttling device without the disadvantages of the expansion valve or the capillary device, and allows to easily replace the coil 16 of said device without cutting and causing any damage to the circuit of the refrigerating fluid.

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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)

Claims (8)

1. Circuit réfrigérant comprenant une première partie (13') et une seconde partie (15) d'un tube capillaire (13) et un dispositif (11, 17, 19) pour le réglage de l'écoulement d'un fluide réfrigérant, intercalé entre les deux parties (13', 15), le dispositif de réglage (11,17,19) étant essentiellement formé d'un récipient creux (11) consistant en un seul corps présentant deux extrémités amincies (12, 14) dans l'une desquelles est insérée une extrémité de la première partie (13') du tube capillaire (13) et dans l'autre (14), une extrémité de la seconde partie (15) du tube capillaire (13), ledit récipient (11) renfermant une cloison (17) présentant un orifice (18) qui détermine l'écoulement maximal de fluide à travers le dispositif de réglage (11, 17, 19) et un élément mobile commandé (19) dont la position par rapport à la cloison (17) est commandée par un champ magnétique engendré par une bobine (16) et par la pression du fluide à l'intérieur dudit tube capillaire (13) et détermine la quantité de fluide réfrigérant traversant le dispositif de réglage (11, 17,19), caractérisé en ce que ladite bobine (16) est montée autour dudit dispositif de réglage (11, 17, 19) et est supportée par une armature de bobine (21) ayant un plus grand diamètre que ledit récipient (11), de telle sorte qu'en cours d'utilisation la bobine (16) est montée autour du récipient (11) et autour d'au moins une partie dudit tube capillaire (13) qui est replié près dudit récipient (11 de telle sorte que l'armature de la bobine (21) puisse être enlevée de l'unité formée par le récipient (11) et par la partie repliée du tube capillaire (13) pour permettre un remplacement de la bobine (16) en cas de dommages, sans avoir à couper le circuit du fluide réfrigérant.
2. Circuit réfrigérant selon la revendication 1, caractérisé en ce que ledit élément mobile (19) présente un embout (20) en nylon.
3. Circuit réfrigérant selon la revendication 1, caractérisé en ce que ledit orifice (18) se présente sous la forme d'un tronc de cône afin de permettre un réglage analogue de l'écoulement du fluide réfrigérant à l'intérieur du dispositif de réglage (11, 17, 19).
4. Circuit réfrigérant selon la revendication 1, caractérisé en ce que ledit orifice (18) présente une forme cylindrique afin de permettre le réglage de l'écoulement du fluid réfrigérant à l'intérieur du dispositif de réglage (11, 17, 19) de type digital.
5. Circuit réfrigérant selon la revendication 3, caractérisé en ce que ledit élément mobile (19) se déplace verticalement et en ce que ledit dispositif de réglage (11, 17, 19) est relié audit tube capillaire (13) et au circuit réfrigérant de telle sorte que, sans excitation de ladite bobine (16), l'élément mobile (19) est soumis à l'action de l'écoulement du fluide réfrigérant qui, en opposition au poids de l'élément mobile (19), laisse en position ouverte le dispositif de réglage (11, 17, 19), tandis que, lorsque le courant électrique passe dans la bobine (16), il se produit un déplacement de l'élément mobile (19) ce qui réduit l'écoulement du fluide réfrigérant à travers le dispositif de réglage (11, 17, 19).
6. Circuit réfrigérant selon la revendication 5, caractérisé en ce que ledit élément mobile (19) se déplace verticalement et en ce que ledit dispositif de réglage (11, 17, 19) est relié audit tube capillaire (13) et au circuit réfrigérant de telle sorte que sans excitation de ladite bobine (16), l'élément mobile (19) est soumis à l'action de son poids et de l'écoulement du fluide réfrigérant, de manière à maintenir en position de fermeture le dispositif de réglage (11, 17, 19), tandis que, lorsque le courant électrique passe dans la bobine (16) il se produit un déplacement de l'élément mobile (19), ce qui entraîne l'ouverture du dispositif de réglage (11, 17, 19).
7. Appareil pour la production de chaleur ou de froid caractérisé en ce qu'il comprend un circuit réfrigérant selon l'une quelconque des revendications précédentes 1 à 6.
8. Système de réglage de l'écoulement du fluide réfrigérant dans un dispositif réfrigérant comprenant au moins deux compartiments de refroidissement à des températures différentes, chacun d'eux étant refroidi par l'intermédiaire d'un évaporateur à travers lequel s'écoule le liquide réfrigérant, un desdits compartiment étant réservé aux denrées fraîches alors que l'autre est destiné aux denrées congelées, un compresseur (1) pour comprimer le fluide réfrigérant, un condenseur (2) pour condenser le fluide réfrigérant provenant du compresseur (1 et des tubes capillaires (4C, 4F) pour transporter le fluide réfrigérant du condenseur (2) aux évaporateurs (6C, 6F), caractérisé en ce qu'il comprend un agencement de tube capillaire (13), d'un dispositif de réglage (11, 17, 19), et d'une bobine (16) tels que revendiqués dans l'une quelconque des revendications précédentes 1 à 6, pour au moins l'un des conduits raccordant le condenseur (2) aux évaporateurs (6C, 6F), et des moyens thermo- statiques de commande qui garantissent un fonctionnement pratiquement indépendant des deux compartiments de refroidissement.
EP82102038A 1981-03-24 1982-03-13 Dispositif pour l'ajustement d'un écoulement de fluide réfrigérant dans un appareil de production de froid ou de chaleur et système pour régler un tel écoulement de fluide Expired EP0061104B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
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
IT5304581U 1981-03-24
IT5333681U IT8153336V0 (it) 1981-06-09 1981-06-09 Perfezionamento di un apparecchio frigorifero
IT5333681U 1981-06-09

Publications (3)

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

Family

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Application Number Title Priority Date Filing Date
EP82102038A Expired EP0061104B1 (fr) 1981-03-24 1982-03-13 Dispositif pour l'ajustement d'un écoulement de fluide réfrigérant dans un appareil de production de froid ou de chaleur et système pour régler un tel écoulement de fluide

Country Status (2)

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105408672A (zh) * 2013-08-02 2016-03-16 Bsh家用电器有限公司 电磁阀以及使用该电磁阀的制冷机

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1144365B (it) * 1981-05-15 1986-10-29 Indesit Sistema di controllo per migliorare il rendimento di apparecchi per la produzione del freddo o del caldo
DE3441251A1 (de) * 1984-11-12 1986-05-22 Danfoss A/S, Nordborg Ventil fuer leicht verdampfbare fluessigkeiten, insbesondere expansionsventil fuer kaelteanlagen
IT1192083B (it) * 1986-05-20 1988-03-31 Zanussi Elettrodomestici Circuito frigorifero con compressore rotativo
DE102013215262A1 (de) * 2013-08-02 2015-02-05 BSH Bosch und Siemens Hausgeräte GmbH Magnetventil und dieses verwendende Kältemaschine

Family Cites Families (12)

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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 (fr) * 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
DE2723365C3 (de) * 1977-05-24 1981-07-02 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Mehrwege-Magnetventil mit einem rohrartigen Ventilgehäuse
GB2016128B (en) * 1978-02-23 1982-12-08 Tokyo Shibaura Electric Co Freezer unit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105408672A (zh) * 2013-08-02 2016-03-16 Bsh家用电器有限公司 电磁阀以及使用该电磁阀的制冷机

Also Published As

Publication number Publication date
DE3273098D1 (en) 1986-10-16
EP0061104A2 (fr) 1982-09-29
EP0061104A3 (en) 1982-11-24

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