EP3034971A1 - Kühlvorrichtung, insbesondere für den haushaltsgebrauch, und zugehöriges verfahren zur herstellung - Google Patents

Kühlvorrichtung, insbesondere für den haushaltsgebrauch, und zugehöriges verfahren zur herstellung Download PDF

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Publication number
EP3034971A1
EP3034971A1 EP15199237.7A EP15199237A EP3034971A1 EP 3034971 A1 EP3034971 A1 EP 3034971A1 EP 15199237 A EP15199237 A EP 15199237A EP 3034971 A1 EP3034971 A1 EP 3034971A1
Authority
EP
European Patent Office
Prior art keywords
pressure side
tray
compressor
refrigeration
refrigeration appliance
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.)
Withdrawn
Application number
EP15199237.7A
Other languages
English (en)
French (fr)
Inventor
Tomasz DEBICKI
Lukasz KOZIARSKI
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 Co 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
Application filed by Indesit Co SpA filed Critical Indesit Co SpA
Publication of EP3034971A1 publication Critical patent/EP3034971A1/de
Withdrawn legal-status Critical Current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
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
    • F25D21/14—Collecting or removing condensed and defrost water; Drip trays
    • 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
    • F25B6/00—Compression machines, plants or systems, with several condenser circuits
    • F25B6/04—Compression machines, plants or systems, with several condenser circuits 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
    • F25B2339/00—Details of evaporators; Details of condensers
    • F25B2339/04—Details of condensers
    • F25B2339/047—Water-cooled condensers
    • 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
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2321/00—Details or arrangements for defrosting; Preventing frosting; Removing condensed or defrost water, not provided for in other groups of this subclass
    • F25D2321/14—Collecting condense or defrost water; Removing condense or defrost water
    • F25D2321/141—Removal by evaporation
    • F25D2321/1411—Removal by evaporation using compressor heat
    • 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
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2321/00—Details or arrangements for defrosting; Preventing frosting; Removing condensed or defrost water, not provided for in other groups of this subclass
    • F25D2321/14—Collecting condense or defrost water; Removing condense or defrost water
    • F25D2321/141—Removal by evaporation
    • F25D2321/1412—Removal by evaporation using condenser heat or heat of desuperheaters

Definitions

  • the present invention relates to a refrigeration appliance, in particular for household use, according to the preamble of claim 1.
  • the present invention also relates to a relative method of realization of said refrigeration appliance.
  • the invention finds application in the field of refrigeration appliances, in particular for household use, comprising at least one inner compartment for storing foodstuffs.
  • a refrigeration appliance known in the art typically comprise two inner refrigeration compartments which are kept at different temperatures, thus providing at least two different foodstuff preservation states, in particular a refrigerator compartment suitable for preserving fresh food at a temperature between 0°C and 10°C and a freezer compartment suitable for preserving frozen food at a temperature between -15°C and -30°C.
  • Such refrigeration appliances are commonly referred to by those skilled in the art of household refrigeration as “double-door” or “combined” refrigerators, depending on the relative position of the two refrigeration compartments; in a “double door” refrigeration appliance the freezer compartment is arranged above the refrigerator compartment, whereas in a “combined” refrigeration appliance the freezer compartment is located at the bottom.
  • refrigeration appliances can be of the no-frost or static type.
  • refrigeration appliances of a static or no-frost type
  • a refrigerating circuit comprising at least a compressor for compressing a refrigerating fluid and a condenser for condensing the refrigerating fluid coming from the compressor; the compressor and the condenser are connected by means of a duct that allows the refrigerating fluid to flow from the compressor to the condenser.
  • the refrigeration cycle is repeated several times and is normally interrupted by a control unit (preferably connected to a thermostat), which ensures the compressor is switched off when in the refrigeration compartment of the appliance the preset temperature has been reached.
  • a control unit preferably connected to a thermostat
  • no-frost refrigeration appliances In no-frost refrigeration appliances, the cold produced by the evaporator is transferred to an airflow over the evaporator which, moved by a fan, circulates through at least one refrigeration compartment. Since the evaporator surface temperature is much lower than 0 °C, the humidity held by air in contact with such surface turns into ice, which accumulates on the evaporator.
  • defrosting is managed electronically and, during appropriate operation phases called indeed defrosting, consists in the activation of appropriate heating means producing the melting of the accumulated ice.
  • Known refrigeration appliances then comprise a tray for collecting a liquid coming from the inner compartment of the refrigeration appliance and positioned in proximity to the compressor; normally, said collecting tray is positioned above the compressor.
  • Such positioning of the collecting tray allows exploiting the heat generated by said compressor in order to obtain the evaporation of the surrounding environment of at least part of the liquid collected in the tray.
  • the ice accumulated on the evaporator melts during the defrosting phase and is channelled towards such collecting tray; moreover, a similar tray is provided in refrigeration appliances of a static type for collecting condensed water that forms on one wall (normally rear wall) of the refrigeration appliance, through which heat exchange with the evaporator occurs.
  • variable speed compressors also known as "VCC” or “variable capacity compressor”
  • VCC variable speed compressors
  • variable capacity compressor the arrival of variable speed compressors has allowed that, as a result of both the nonuniform power absorbed by them and their higher efficiency, the heat produced by such compressors can also be lower than that produced by the compressors known in the art; as a consequence, the implementation of variable speed compressors in known refrigeration appliances may also increase the risk of insufficient heating of the collecting tray and, consequently, of an inadequate disposal of the liquid contained in it.
  • the present invention provides a refrigeration appliance, in particular for household use, and a relative method of realization, which incorporate the features set out in the appended claims, which are intended to be an integral part of the present description.
  • a refrigeration appliance in particular for household use, according to the present invention, is designated as a whole by reference numeral 1.
  • Said refrigeration appliance 1 comprises at least one cabinet 2 adapted to define at least one refrigeration compartment 2A, 2B, 2C.
  • said at least one refrigeration compartment 2A, 2B, 2C can comprise one refrigerator compartment 2A for preserving fresh food (normally at a temperature between 0°C and 10°C) and a freezer compartment 2B for preserving frozen food (normally at a temperature between -15°C and -30°C); furthermore, in no-frost refrigeration appliances 1, said at least one refrigeration compartment 2A, 2B, 2C can comprise an additional refrigeration compartment 2C inside the cabinet 2 and adapted to include at least one evaporator 21 and one fan (not shown).
  • the refrigeration appliance 1 may be so realised as to comprise only one refrigeration compartment 2A, 2B, 2C or a larger number of inner refrigeration compartments 2A, 2B, 2C, in particular kept at different temperatures from each other, thus providing different foodstuffs preservation states.
  • the refrigeration appliance 1 represented in Fig. 1 shows that the refrigerator compartment 2A is arranged above the freezing compartment 2B; as a consequence, the refrigeration appliance 1 represented in Fig. 1 is of the "combined" type. It is however clear that, according to the present invention, the relative position between the refrigerator compartment 2A and the freezing compartment 2B may be of a different type as well, i.e., the refrigeration appliance 1 may be of a "double door" type.
  • the refrigeration appliance 1 preferably comprises a first door 3A and a second door 3B respectively provided for closing the refrigerator compartment 2A and the freezing compartment 2B; moreover, each door 3A, 3B is connected to the refrigerating appliance 1 by means of one or more hinges (not shown) that allow for constrained outward rotation of the door 3A, 3B for their opening (as shown in Fig. 1 ) and for closing it.
  • the refrigeration appliance 1 comprises at least one gasket (not shown in Fig. 1 ) for optimum coupling of said at least one door 3A, 3B with said at least one cabinet 2.
  • the refrigeration appliance 1 represented in Fig. 1 shows some elements commonly comprised in a refrigeration appliance 1, such as a plurality of shelves 4 and a plurality of containers 5 that are arranged at different levels in said refrigerator compartment 2A and a plurality of drawers 6 and/or a plurality of shelves (not shown) that may be closed by means of a hinged front panel, which can be rotated to allow access to the shelf, arranged at different levels in said freezer compartment 2B.
  • Figure 1 also shows door shelves 7 associated with said first door 3A of the refrigerator compartment 2A, said door shelves 7 being adapted to receive containers, bottles and possible foodstuffs.
  • FIG. 2 and 3 shows the schematic diagrams respectively of a first and a second embodiment of the refrigeration appliance 1 according to the present invention, said refrigeration appliance 1 comprising a refrigerating circuit, designated as a whole by reference numeral CR.
  • the refrigerating circuit CR is divided into a high-pressure side 10 and a low-pressure side 20, wherein said high-pressure side 10 begins at the outlet of a compressor 11 that allows compressing a refrigerating fluid, comprises a condenser 12 for condensing the refrigerating fluid coming from the compressor 11, and reaches the inlet of an expansion member 13.
  • the low-pressure side 20 begins at the outlet of the expansion member 13, comprises one evaporator 21 and reaches the inlet of the compressor 11.
  • the high-pressure side 10 comprises a set of components in which the refrigerating fluid is in a high pressure and high temperature condition
  • the low-pressure side 20 comprises a set of components in which the refrigerating fluid is in a low pressure and low temperature condition.
  • the compressor 11 is powered by a power line, which can be closed via a switch (not shown), and is controlled by a control unit 8 which controls the temperature inside said cabinet 2 and/or of said at least one refrigeration compartment 2A, 2B, 2C, in particular in the refrigerator compartment 2A and in the freezer compartment 2B.
  • the condenser 12 may be of any known type and used in household refrigeration appliances, in particular it may be air-cooled, static or with finned coil and/or ventilated by means of a fan (not shown).
  • the expansion member 13 is constituted by a capillary (normally made of copper), i.e. a thin duct (with a diameter of some tenths of a millimetre) and some meters in length; said capillary may be substituted by any expansion member known in the art.
  • the expansion member 13 allows to determine a significant pressure (and temperature) drop of the refrigerating fluid present in the refrigerating circuit CR and to measure the inlet of the refrigerating fluid inside the evaporator 14; it will be understood that, if the refrigeration appliance is provided with several refrigeration compartments 2A, 2B, 2C, the refrigerating circuit CR may comprise a plurality of evaporators 14.
  • the refrigeration appliance 1 comprises a tray 30 for collecting a liquid coming from said at least one refrigeration compartment 2A, 2B, 2C and positioned in proximity to said compressor 11; such positioning of the collecting tray 30 allows exploiting the heat produced by the compressor 11, in order to obtain the evaporation of the surrounding environment of at least part of the liquid collected in the tray 30 and coming from the refrigeration compartment 2A, 2B, 2C.
  • said tray 30 is positioned above the compressor 11, in particular in a condition in which the refrigeration appliance 1 is installed in the environment where it will be used; however, it is clear that the tray 30 may also be positioned in a different way, but however preferably in such a way as to exploit the heat produced by said compressor 11 in order to obtain the evaporation of at least part of the liquid coming from the refrigeration compartment 2A, 2B, 2C.
  • Figures 2 and 3 also show that the tray 30 is connected to the refrigeration compartment 2A, 2B, 2C by means of a pipe 40, that allows the liquid of the refrigeration compartment 2A, 2B, 2C to flow to the tray 30.
  • this may be the liquid that forms after the melting of the ice accumulated on the evaporator 21, in particular in a refrigeration appliance 1 of the no-frost type, or it may be constituted by the condensed water which normally forms on one wall through which the heat exchange with the evaporator 21 occurs, in particular in a refrigeration appliance 1 of the static type.
  • the evaporator 21 may be associated with a fan (not shown) for the movement of refrigerating air inside the refrigeration appliance 1.
  • At least one tract 101; 102 of the high-pressure side 10 is realized in such a way that it enters, at least partially, said tray 30.
  • said at least one tract 101; 102 of the high-pressure side 10 is realized in such a way that it enters, at least partially, the volume 31 delimited by the walls 32, 32I of the tray 30.
  • said at least one tract comprises a first branch 101 of a duct 11C that connects the compressor 11 to the condenser 12 and allows the refrigerating fluid to flow from the compressor 11 to the condenser 12.
  • said at least one tract comprises a second branch 102 that extends from the condenser 12; in particular, said condenser 12 comprises a system of pipes arranged as a coil, and said second branch 102 extends from said coil and then enters, at least partially, the tray 30.
  • said at least one tract 101; 102 of the high-pressure side 10 allows to realize the refrigeration appliance 1 in such a way as to prevent possible damages of such refrigeration appliance 1 or of the environment in which it is installed; indeed, in known refrigeration appliances such damages may occur after the overflow of the liquid from the tray and an unwanted contact with an electrical circuit.
  • Figure 4 shows a possible embodiment of said at least one tract 101; 102 of the high-pressure side 10.
  • said at least one tract 101; 102 comprises:
  • said first portion 103 extends from the duct 11C in the first embodiment shown in Fig. 2 and from the condenser 12 in the second embodiment shown in Fig. 3 , while said second portion 105 connects again to the duct 11C in the first embodiment shown in Fig. 2 and to the condenser 12 in the second embodiment shown in Fig. 3 .
  • said central portion 104 has a winding shape that maximizes the area of thermal exchange between said at least one tract 101; 102 and the volume 31 delimited by the walls 32, 32I of the tray 30.
  • said central portion 104 is preferably realized in such a way that it has a surface made of a corrosion-resistant material; in a preferred embodiment, the central portion 104 being coated with an anti-corrosion paint. Such a provision allows to the central portion 104 to maintain its characteristics unchanged, also after a prolonged contact with the liquid coming from the refrigeration compartment 2A, 2B, 2C and collected in the tray 30.
  • the central portion 104 substantially extends in a perpendicular way with respect to said first portion 103 and second portion 105; in particular, said central portion 104 substantially extends in a parallel way with respect to one bottom wall 32I of the tray 30 and in a substantially perpendicular way with respect to the side walls of the tray 30, when the central portion 104 is housed inside the tray 30.
  • the following description relates to a method of realization of a refrigeration appliance 1, in particular for household use, comprising:
  • said method comprises a step of realizing at least one tract 101; 102 of said high-pressure side 10 in such a way that it enters, at least partially, said tray 30.
  • said step is obtained by realizing said at least one tract 101; 102 of the high-pressure side 10 in such a way that it enters, at least partially, a volume 31 delimited by the walls 32, 32I of the tray 30.
  • said step may be obtained by providing a first branch 101 of a duct 11C that connects the compressor 11 to the condenser 12 and allows the refrigerating fluid to flow from the compressor 11 to the condenser 12.
  • said step may be obtained by providing a second branch 102 extending from the condenser 12, in particular said second branch 102 being so realized as to extend from a condenser 12 comprising a system of pipes arranged as a coil.
  • the method according the present invention comprises the step of realizing said at least one tract 101; 102 in such a way as to comprise:
  • the method according the present invention comprises the step of realizing said central portion 104 in such a way as to have a winding shape that maximizes the area of thermal exchange between said at least one tract 101; 102 and the volume 31 delimited by the walls 32, 32I of the tray 30.
  • the method according the present invention may comprise the step of realizing said central portion 104 in such a way as to have a surface made of a corrosion-resistant material, in particular said central portion 104 being coated with an anti-corrosion paint.
  • said at least one tract 101; 102 allows to provide a refrigeration appliance 1 which is so realised as to allow an adequate disposal of the liquid collected in said tray 30 and as to prevent that phenomena of overflow of said liquid may occur.
  • said at least one tract 101; 102 of the high-pressure side 10 allows to realize the refrigeration appliance 1 in such a way as to prevent possible damages of such refrigeration appliance 1 and of the environment in which it is installed; indeed, in known refrigeration appliances such damages may occur after the overflow of the liquid from the tray and its unwanted contact with an electrical circuit.
  • the present invention has provided a detailed description of a refrigeration appliance particularly adapted for household use; however, the present invention may conveniently find application also for refrigerating appliances that can be used in the nautical or hospitality sectors.
  • a further variation may consist in the fact that said at least one tract 101; 102 can be constituted by a portion of the high-pressure side 10 positioned between the condenser 12 and the expansion member 13.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
EP15199237.7A 2014-12-18 2015-12-10 Kühlvorrichtung, insbesondere für den haushaltsgebrauch, und zugehöriges verfahren zur herstellung Withdrawn EP3034971A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITTO20141061 2014-12-18

Publications (1)

Publication Number Publication Date
EP3034971A1 true EP3034971A1 (de) 2016-06-22

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ID=52464517

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Application Number Title Priority Date Filing Date
EP15199237.7A Withdrawn EP3034971A1 (de) 2014-12-18 2015-12-10 Kühlvorrichtung, insbesondere für den haushaltsgebrauch, und zugehöriges verfahren zur herstellung

Country Status (2)

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EP (1) EP3034971A1 (de)
RU (1) RU2015154470A (de)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1416502A (fr) * 1964-09-16 1965-11-05 Hotchkiss Brandt Méthode pour activer l'évaporation de l'eau de dégivrage d'un réfrigérateur
EP1132697A2 (de) * 2000-03-09 2001-09-12 Linde Aktiengesellschaft Vorrichtung zum Verdunsten von Wasser
US20070271941A1 (en) * 2003-03-26 2007-11-29 Bsh Bosch Und Siemens Hausgerate Gmbh Refrigeration Device With Condensation Water Compressor
DE102011084823A1 (de) * 2011-10-19 2013-04-25 BSH Bosch und Siemens Hausgeräte GmbH Kältegerät mit einer Verdunstungsschale

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1416502A (fr) * 1964-09-16 1965-11-05 Hotchkiss Brandt Méthode pour activer l'évaporation de l'eau de dégivrage d'un réfrigérateur
EP1132697A2 (de) * 2000-03-09 2001-09-12 Linde Aktiengesellschaft Vorrichtung zum Verdunsten von Wasser
US20070271941A1 (en) * 2003-03-26 2007-11-29 Bsh Bosch Und Siemens Hausgerate Gmbh Refrigeration Device With Condensation Water Compressor
DE102011084823A1 (de) * 2011-10-19 2013-04-25 BSH Bosch und Siemens Hausgeräte GmbH Kältegerät mit einer Verdunstungsschale

Also Published As

Publication number Publication date
RU2015154470A (ru) 2017-06-22

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