EP1659356A2 - Réfrigérateur et/ou congélateur - Google Patents

Réfrigérateur et/ou congélateur Download PDF

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Publication number
EP1659356A2
EP1659356A2 EP05025162A EP05025162A EP1659356A2 EP 1659356 A2 EP1659356 A2 EP 1659356A2 EP 05025162 A EP05025162 A EP 05025162A EP 05025162 A EP05025162 A EP 05025162A EP 1659356 A2 EP1659356 A2 EP 1659356A2
Authority
EP
European Patent Office
Prior art keywords
interior
connecting line
ambient atmosphere
freezer
refrigerator
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
EP05025162A
Other languages
German (de)
English (en)
Other versions
EP1659356A3 (fr
EP1659356B1 (fr
Inventor
René Waldner
Roland Schelodetz
Andreas Prentner
Gerd Obertscheider
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.)
Liebherr Hausgeraete Lienz GmbH
Original Assignee
Liebherr Hausgeraete Lienz GmbH
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 Liebherr Hausgeraete Lienz GmbH filed Critical Liebherr Hausgeraete Lienz GmbH
Publication of EP1659356A2 publication Critical patent/EP1659356A2/fr
Publication of EP1659356A3 publication Critical patent/EP1659356A3/fr
Application granted granted Critical
Publication of EP1659356B1 publication Critical patent/EP1659356B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F25D21/04—Preventing the formation of frost or condensate
    • 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
    • F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
    • F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
    • F25D17/042—Air treating means within refrigerated spaces
    • 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
    • F25D2317/00—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass
    • F25D2317/04—Treating air flowing to refrigeration compartments
    • F25D2317/041—Treating air flowing to refrigeration compartments by purification
    • F25D2317/0411—Treating air flowing to refrigeration compartments by purification by dehumidification

Definitions

  • the invention relates to a refrigerator and / or freezer with a coolable by means of a refrigeration device interior for receiving the goods to be cooled, which is closed by a door or flap, wherein the interior communicates via at least one connecting line with the ambient atmosphere and wherein a in The connecting line arranged desiccant is provided by means of which the air flowing into the interior of the air moisture is removed.
  • a refrigerator and / or freezer is known, for example, from EP 0 805 321 B1.
  • the interior of the device is connected via a arranged in the door or flap of the device connecting line with the ambient atmosphere in connection.
  • the connecting line there is a regenerable desiccant, by means of which the air flowing in via the connecting line into the interior air moisture is extracted.
  • the regeneration of the drying agent takes place in that the cold dry air flowing out of the interior during the compressor standstill flows through the desiccant, thereby absorbing moisture and thus regenerating the desiccant.
  • the regenerable drying agent serves to keep the moisture content in the interior of the refrigerator or freezer low and thus counteract the risk of icing.
  • a further disadvantage is that humid air is sucked into the interior in the case of a connecting line blocked by icing through the finest leaks during the cooling process, which leads to the device beginning to freeze strongly.
  • This object is achieved on the basis of a refrigerator and / or freezer of the type mentioned above in that the section of the connecting line located between the interior and the desiccant and / or between the desiccant and the ambient atmosphere is provided with a heating device.
  • a heating device In this way it is possible to heat the corresponding sections of the connecting line, whereby the ice formation can be effectively prevented or reduced and ensures the exchange of air even at high humidity and / or many openings of the door or flap of the device is.
  • the heating device may be designed such that it is operated permanently or intermittently. The exact adjustment of the parameters of the heater can be chosen so that icing does not or not to the extent that the air exchange over the said connection line is substantially hindered.
  • the design of the heater is essentially arbitrary. It is conceivable, for example, that the heating device is designed as a resistance heating element.
  • the located between the interior and the desiccant section of the connecting line is designed as a corrugated hose. In a preferred embodiment of the invention, this opens into an opening in the interior of the refrigerator or freezer and is used to supply air or discharge into and out of the interior.
  • the present invention can also be realized with two or more than two connecting lines, via which the interior of the refrigerator and / or freezer communicates with the ambient atmosphere, wherein preferably each of the connecting lines is provided with a heating device. It is also conceivable, not all, but only one or some of the connecting lines to perform with a heater, so that under extreme conditions, d. H. high humidity or frequent opening of the device at least these lines are available for air exchange.
  • the door, flap or the inner container of the device is provided with an opening into which the connecting line opens. It is also possible to provide the opening at any other location of the refrigerator or even several such openings.
  • the door or flap has an inner lid adjacent to the refrigerator compartment and an outer lid communicating with the ambient atmosphere, wherein the inner lid has an opening into which open the connecting line or connecting lines and wherein the connecting line and the heating device between the inner and outer lid are arranged.
  • the desiccant may be received in a dryer cartridge having an opening in an end region over which the dryer cartridge communicates with the ambient atmosphere.
  • the dryer cartridge communicates in its other end with the above-mentioned corrugated hose or with any other conduit in connection, leading to the interior of the device.
  • the dryer cartridge it is also possible for the dryer cartridge to be connected in its two end regions to further sections of the connecting line or further corrugated tubes, one of which opens into the interior space and the other into the ambient atmosphere.
  • the heating device can be arranged such that it heats the connecting lines or corrugated tubes over their entire length or only in sections.
  • the desiccant is arranged such that it is regenerated exclusively by the cold, dry air flowing out of the interior of the refrigerator and / or freezer into the ambient atmosphere during the standstill of the compressor. This air absorbs moisture from the desiccant and transports it to the ambient atmosphere, thereby regenerating the desiccant.
  • FIG. 1 shows a perspective view of a partial region of the inner lid 12 which forms the region of the flap or the lid of a freezer adjacent to the refrigerator compartment.
  • the opening 16 through which dry air flows out of the interior of the device when the compressor of the refrigeration device of the device and when operating befindlichem compressor by means of the drying agent dehumidified air flows from the environment into the interior.
  • the two marked in Figure 1 oval areas indicate the sections in which are located in the area behind the inner lid 12 arranged heated corrugated tubes, the arrangement of which shows in detail from Figure 5.
  • the said corrugated hoses are heated by means of a suitable heating device in order to prevent ice formation in the corrugated hoses or to reduce them to a level which allows an exchange of air between the interior of the device and the ambient atmosphere.
  • the heater can be designed arbitrarily.
  • the resistance heating element 32 shown in FIG. 2 can be used, which can be wound in a suitable manner around the connection line or the corrugated tube or can be guided along it in order to effect the required heating. In his End regions, the resistance heating element 32 has two contacts for electrical supply.
  • the heating device according to the invention can be operated continuously or intermittently.
  • the operation of the heater is essentially to be dimensioned so that the formation of ice in the affected areas of the connecting tube is prevented or reduced to a level that allows the exchange of air between the interior and ambient atmosphere in the desired manner.
  • FIG. 3 shows a view of the corrugated hose 22 whose end 24 shown on the left is connected to the inner cover 12 of the flap of the device such that it opens into the opening 16 according to FIG. 1 or is in communication therewith.
  • the illustrated on the right end 23 is connected to the apparent from Figure 5 dryer cartridge.
  • the resistance heating element 32 is guided and fastened thereto in a suitable manner so that the desired heating of the corrugated hose 22 takes place when the current flows through the heating element 32.
  • FIG. 4 shows a thermographic image of the arrangement according to FIG. 3 and illustrates that the resistance heating element 32 in the current-carrying state leads to the desired heating of the corrugated tube 22.
  • Figure 5 shows a perspective view of the adjacent to the interior of the device inner lid 12 and adjacent to the ambient atmosphere outer cover 14, which together form the flap of the device.
  • a corresponding design is of course also possible with a door of a refrigerator or freezer.
  • FIG. 5 illustrates that two connecting lines 20, 20 'are arranged in the area between the inner lid 12 and the outer lid 14, and these are shown in FIG Corrugated hoses 22, 22 'include, which in turn are provided with heaters 30, 30'.
  • the corrugated hoses 22, 22' are in communication with dryer cartridges 40, 40 ', which are also part of the connecting lines according to the invention.
  • the dry cold air flows due to its expansion through the opening 16 in the corrugated hoses 22, 22 'and then in the dryer cartridges 40, 40'.
  • the dry air absorbs moisture from the desiccant, which regenerates it. The moisture is transported in this way to the outside in the ambient atmosphere.
  • the heaters 30, 30 ' cause the formation of ice in the corrugated tubes 22, 22' is prevented or prevented so far that an exchange of air between the interior of the device and ambient atmosphere remains ensured.
  • connection line it is not absolutely necessary to heat the entire connection line. For example, it is possible to heat only a portion of the connecting line, in which without heating usually with an increased incidence of ice is to be expected. As can be seen from the exemplary embodiment according to FIG. 5, it may be sufficient to heat the part of the connecting lines which adjoins the opening 16 to the interior of the device and to provide no heating device in the area adjoining the dryer cartridges.
  • said heating means it is possible to operate said heating means continuously or intermittently. In the latter case, it may be provided to provide constant periods without heating between heating periods or to make the heating also dependent on certain parameters, such as, for example, the humidity, the pressure drop across the connecting line or the frequency of the openings of the refrigerator or freezer.
  • the measurement of the pressure drop in the connecting line or in sections of the connecting line can also be used to determine whether or to what extent the connecting line is permeable or blocked. It would be necessary to provide a control device which makes the heating power or heating times dependent on the parameters mentioned.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
  • Drying Of Solid Materials (AREA)
EP05025162A 2004-11-17 2005-11-17 Réfrigérateur et/ou congélateur Expired - Lifetime EP1659356B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE202004017836U DE202004017836U1 (de) 2004-11-17 2004-11-17 Kühl- und/oder Gefriergerät

Publications (3)

Publication Number Publication Date
EP1659356A2 true EP1659356A2 (fr) 2006-05-24
EP1659356A3 EP1659356A3 (fr) 2009-03-04
EP1659356B1 EP1659356B1 (fr) 2011-08-17

Family

ID=35841981

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05025162A Expired - Lifetime EP1659356B1 (fr) 2004-11-17 2005-11-17 Réfrigérateur et/ou congélateur

Country Status (4)

Country Link
EP (1) EP1659356B1 (fr)
AT (1) ATE520936T1 (fr)
DE (1) DE202004017836U1 (fr)
ES (1) ES2368433T3 (fr)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0805321B1 (fr) 1996-05-03 2001-12-05 LIEBHERR-WERK LIENZ GES. mbH Appareil de réfrigération et/ou de congélation

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2604760A (en) * 1950-04-29 1952-07-29 Gen Electric Moisture collecting and removing arrangement
US4911739A (en) * 1989-07-07 1990-03-27 Multiform Desiccants, Inc. Self-retaining adsorbent cartridge for refrigerant receiver
DE19957807A1 (de) * 1999-12-01 2001-06-07 Bsh Bosch Siemens Hausgeraete Kältegerät

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0805321B1 (fr) 1996-05-03 2001-12-05 LIEBHERR-WERK LIENZ GES. mbH Appareil de réfrigération et/ou de congélation

Also Published As

Publication number Publication date
ATE520936T1 (de) 2011-09-15
ES2368433T3 (es) 2011-11-17
DE202004017836U1 (de) 2006-03-23
EP1659356A3 (fr) 2009-03-04
EP1659356B1 (fr) 2011-08-17

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