EP3497386B1 - Kältegerät mit null-grad-fach mit optimierter kühlstruktur - Google Patents

Kältegerät mit null-grad-fach mit optimierter kühlstruktur Download PDF

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Publication number
EP3497386B1
EP3497386B1 EP17851898.1A EP17851898A EP3497386B1 EP 3497386 B1 EP3497386 B1 EP 3497386B1 EP 17851898 A EP17851898 A EP 17851898A EP 3497386 B1 EP3497386 B1 EP 3497386B1
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EP
European Patent Office
Prior art keywords
zero
compartment
air flow
degree compartment
height
Prior art date
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Application number
EP17851898.1A
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English (en)
French (fr)
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EP3497386A2 (de
Inventor
Ayd n ÇEL K
Aylin MET
Sabahattin HOCAO LU
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.)
Arcelik AS
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Arcelik AS
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Priority to PL17851898T priority Critical patent/PL3497386T3/pl
Publication of EP3497386A2 publication Critical patent/EP3497386A2/de
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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
    • F25D25/00—Charging, supporting, and discharging the articles to be cooled
    • F25D25/02—Charging, supporting, and discharging the articles to be cooled by shelves
    • F25D25/024—Slidable shelves
    • F25D25/025—Drawers
    • 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
    • F25D17/06—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation
    • F25D17/08—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation using ducts
    • 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
    • F25D2317/06—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 with forced air circulation
    • F25D2317/061—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 with forced air circulation through special compartments
    • 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
    • F25D2500/00—Problems to be solved
    • F25D2500/02—Geometry problems

Definitions

  • the present invention relates to a refrigeration appliance comprising a zero degree (0°C) compartment with channels via which cool air is supplied to the zero degree compartment, where the dimensions of said channels and said zero degree compartment are optimized to ensure energy efficient cooling.
  • a refrigerating appliance such as a refrigerator operates based on the principles of the vapor-compression refrigeration cycle. Namely, cooling is performed by the refrigerant fluid, which is circulated between an evaporator, a compressor, a condenser and a tube expander (throttling device). While passing through the evaporator, the refrigerant fluid undergoes a phase transition from liquid phase into gas phase by way of absorbing the ambient heat of the refrigeration compartment. The cooled air around the evaporator is circulated back to the compartments where food items are preserved via a fan and cooling ports placed on the compartment's wall.
  • a refrigeration appliance has a plurality of shelves and compartments for preserving food items.
  • Two main compartments found in refrigerators are a freezing compartment (at -18°C) and a refrigerating compartment (at or below 4°C).
  • Food items can decompose enzymatically, biochemically, microbiologically and/or physically.
  • the speed and mechanism of decomposition is closely related to the temperature of the preservation environment.
  • perishables such as meat need to be preserved at near freezing temperatures.
  • current refrigerators comprise an additional compartment, referred to as a zero-degree compartment, which is kept at 0°C.
  • zero degree compartments are generally placed below the compartment with the coolest air supply and are cooled by cool air flow directly into the compartment. Direct air flow causes higher heat release within the compartment and also causes food items to come in contact with dry air. It is necessary to close air outlets at the back of the compartment and direct air flow in such a way that it is only in contact with the outside walls of the compartment and cools the compartment indirectly to overcome this disadvantage.
  • EP1811251A2 discloses a system and method for a refrigeration appliance comprising two or more compartments, where one compartment is a sub storage compartment, which is situated above the crisper compartment.
  • the temperature of the sub storage compartment can be controlled independently from the other compartments and can be cooler or warmer than said other compartments.
  • the sub storage compartment is indirectly cooled by cold air supply from evaporator via air ducts controlled by a damper and indirectly warmed by a heater. Heat transfer between the sub storage compartment and the other compartments is prevented by insulating member surrounding the sub storage compartment.
  • a refrigeration appliance according to the preamble of claim 1 is known from JPH09324980A.
  • the present invention addresses the situation where the shape and dimensions of the zero-degree compartment are optimized to ensure ideal storage conditions.
  • the present invention provides a refrigeration appliance operating based on the principles of the vapor-compression refrigeration cycle; where said refrigeration appliance comprises at least two compartments and where at least one of said compartments is used as a zero-degree compartment.
  • the zero-degree compartment comprises channels through which indirect cooling of the zero-degree compartment is achieved by cool air flow supplied to these channels from the evaporator. Cool air flow is regulated by adjusting evaporator fan speed according to evaporator surface temperature, thereby lowering heat release and preventing formation of condensation on the roof of the zero-degree compartment due to moisture release. Channel dimensions are optimized to ensure energy efficient cooling of the zero degree compartment.
  • the present invention provides a refrigeration appliance comprising a zero-degree compartment, the dimensions of which are optimized to ensure energy efficient cooling as provided by the characterizing features defined in Claim 1.
  • Primary object of the present invention is to provide a refrigeration appliance comprising a zero-degree compartment possessing channels via which cool air is supplied to the zero degree compartment from an evaporator, where the dimensions of said channels and said zero degree compartment are optimized to ensure energy efficient cooling.
  • the present invention proposes a refrigeration appliance (1) having a generally rectangular cross-sectional storage cabin (2).
  • the refrigeration appliance (1) conventionally operates based on the principles of the vapor-compression refrigeration cycle such that cooling is achieved by circulation of a refrigerant through a compressor, a condenser, a tube expander and an evaporator, where said refrigeration appliance (1) comprises a plurality of shelves (3) and compartments and where at least one of said compartments is used as a zero-degree compartment (4).
  • Said zero-degree compartment (4) is placed within the storage cabin (2) to be positioned below the lowermost portion of the evaporator level in the proximity thereof.
  • the evaporator (not shown) extends in perpendicular to the base of the refrigeration appliance (1) in parallel with the rear surface of the cabin. More particularly, the zero-degree compartment (4) is configured to be at the lower portion of the fresh food compartment below several shelves (3) and below the evaporator's lowermost tubes. In this configuration, there still exist additional space for an extractable division (5) for fruits and vegetable at the lowermost portion of the storage cabin (2) below said zero-degree compartment (4).
  • the extractable division (5) has an extractable division cover (6) and said zero-degree compartment (4) is enclosed by top and bottom covers (7, 8) at both vertical sides thereof.
  • the temperature of said zero-degree compartment (4) is regulated by adjusting evaporator fan speed according to evaporator surface temperature, thereby lowering heat release and preventing unwanted heating of the storage cabin (2).
  • Zero-degree compartment (4) is indirectly cooled from its bottom, rear and side walls by cool air flowing into channels placed along said walls supplied from evaporator.
  • the dimensions of said channels i.e. top channel (9), bottom channel (10), rear channel (11) as well as shelf distance (12, (d)), height (H) of zero-degree compartment (4) and height (h) and width (w) of air flow port (13) and ratios thereof are optimized to prevent formation of condensation on the roof of the zero-degree compartment (4) and ensure energy efficient cooling of the same.
  • the shelf distance (12, (d)) is defined as the distance between a door shelf (14) and the zero-degree compartment (4).
  • cool air leak refers to cool air flow to top channel (9) and directly into zero-degree compartment (4). Direct air flow trough said top channel (9) causes food items to come in contact with dry air. Therefore, the vertical dimension c of the top channel (9) should be kept at a substantially reduced amount only to allow cool air leak to prevent condensation on the top cover (7).
  • h:H ratio constant, different d values have a negligible effect on cool air leak flowrate. It is found that as d is increased, cool air leak flowrate is decreased. For this reason, d:a is configured to be greater than 1:1.
  • a is defined as the distance between the zero-degree compartment (4) and the inner rear wall of the storage cabin (2), where said air flow port (13) is present.
  • Cool air leak flowrate is constant for h:H between 1:5 and 1:1.25.
  • cool air leak flowrate increases as air flow port becomes level with top channel (9) and a serious amount of cool air flow is directed into said top channel (9) to come in contact with food items stored therein.
  • h:H ratio is configured to be smaller than 1:3.
  • h:H ratio of 1:4 provides better cooling from bottom wall and promotes temperature uniformity between bottom wall and rear and front walls. Since flowrate along rear channel (11) is decreased, bottom wall must be cooled more efficiently. According to these results, h:H is configured to be between 1:10 and 1:3 for most efficient cooling from bottom channel (10).
  • volumetric flowrate of cool air is dependent on height (H) of zero-degree compartment (4) and width (w) of air flow port such that: If w:H is between 0.15 and 0.25, then h:H is configured to be between 0.1 and 0.8;
  • h:H is configured to be between 0.2 and 0.7.
  • a is configured to be greater than b.
  • b is defined as the vertical dimension of the bottom channel (10).
  • c:d ratio is configured to be greater than a:b ratio to ensure natural flow.
  • a:b ratio must be between or equal to 3:1 and 1:1.
  • a refrigeration appliance (1) comprising a storage cabin (2), a compressor, a condenser, a tube expander and an evaporator such that cooling of said storage cabin (2) is effectuated by circulation of a refrigerant through said compressor, condenser, tube expander and evaporator, said refrigeration appliance (1) further comprising a zero-degree compartment (4) with a top channel (9), a bottom channel (10) and a rear channel (11) in said storage cabin (2), said zero-degree compartment (4) is indirectly cooled from its bottom, rear and side walls by cool air supplied from said evaporator flowing into said top channel (9), bottom channel (10) and rear channel (11) placed along said walls in the manner that the ratio of a shelf distance (12) over the distance between the zero-degree compartment (4) and an inner rear wall neighboring said rear channel (11) is greater than 1, said shelf distance (12) being defined as the distance between a door shelf (14) and the zero-degree compartment (4), the ratio of the height of an air flow port (13) over the height of said zero
  • the ratio of width over height of the air flow port (13) is between 0.15 and 0.25
  • the ratio of the height of the air flow port (13) over the height of said zero-degree compartment (4) is configured to be between 0.1 and 0.8.
  • the ratio of width over height of the air flow port (13) is between 0.25 and 0.35
  • the ratio of the height of the air flow port (13) over the height of said zero-degree compartment (4) is configured to be between 0.2 and 0.7.
  • said zero-degree compartment (4) is placed within the storage cabin (2) to be positioned below the lowermost portion of the evaporator level in the proximity thereof.
  • a refrigeration appliance (1) comprising a zero-degree compartment (4) is proposed such that channels via which cool air is supplied to the zero-degree compartment (4) have dimensions and ratios thereof optimized to ensure energy efficient cooling.

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  • 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)

Claims (4)

  1. Ein Kühlgerät (1) umfasst eine Lagerkabine (2), einen Kompressor, einen Kondensator, einen Rohrexpander und einen Verdampfer, so dass die Kühlung der Lagerkabine (2) durch Zirkulation eines Kältemittels durch den Kompressor, den Kondensator, den Rohrexpander und den Verdampfer bewirkt wird; die Kühlvorrichtung (1) umfasst des Weiteren ein Null-Grad-Fach (4) mit einem oberen Kanal (9), einem unteren Kanal (10) und einem hinteren Kanal (11) in der Lagerkabine (2) und einer Luftströmungsöffnung (13), die an der inneren Rückwand der Lagerkabine (2) angeordnet sind, um der Rückwand des Null-Grad-Abteils (4) kühle Luft zuzuführen, wobei das Null-Grad-Fach (4) indirekt von seinem Boden hinten gekühlt wird und die Seitenwände durch kühle Luft, die von dem Verdampfer über die Luftströmungsöffnung (13) zugeführt wird und in den oberen Kanal (9), den unteren Kanal (10) und den hinteren Kanal (11) strömt, die entlang der Wände angeordnet sind; gekennzeichnet ist es dadurch, dass das Verhältnis eines Regalabstands (12) zum Abstand zwischen dem Null-Grad-Fach (4) und einer inneren Rückwand neben dem hinteren Kanal (11) größer als 1 ist, wobei der Regelabstand (12) so definiert ist, dass der Abstand zwischen einem Türregal (14) und dem Null-Grad-Fach (4) und das Verhältnis der Höhe der Luftströmungsöffnung (13) zur Höhe des Null-Grad-Abteils (4) zwischen 1:10 und 1: 3 liegt.
  2. Ein Kühlgerät (1), wie in Anspruch 1 aufgeführt, ist dadurch gekennzeichnet, dass wenn das Verhältnis der Breite zur Höhe der Luftströmungsöffnung (13) zwischen 0,15 und 0,25 liegt, das Verhältnis der Höhe der Luftströmungsöffnung (13) zur Höhe der Null-Grad-Kammer (4) so konfiguriert ist, dass es zwischen 0,1 und 0,8 ist.
  3. Ein Kühlgerät (1), wie in Anspruch 1 oder 2 aufgeführt, ist dadurch gekennzeichnet, dass, wenn das Verhältnis von Breite zu Höhe der Luftströmungsöffnung (13) zwischen 0,25 und 0,35 liegt, das Verhältnis der Höhe der Luftströmungsöffnung (13) über der Höhe des Null-Grad-Abteils (4) so konfiguriert ist, um zwischen 0,2 und 0,7 zu liegen.
  4. Ein Kühlgerät (1), wie in einem der vorherigen Ansprüchen aufgeführt, ist dadurch gekennzeichnet, dass das Null-Grad-Fach (4) in der Lagerkabine (2) angeordnet ist, um unter dem untersten Teil des Verdampferniveaus in dessen Nähe positioniert zu sein.
EP17851898.1A 2016-08-12 2017-07-26 Kältegerät mit null-grad-fach mit optimierter kühlstruktur Active EP3497386B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL17851898T PL3497386T3 (pl) 2016-08-12 2017-07-26 Urządzenie chłodzące z komorą zero stopni mającą zoptymalizowaną konstrukcję w celu chłodzenia

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TR2016/11337A TR201611337A3 (tr) 2016-08-12 2016-08-12 Soğutma i̇çi̇n opti̇mi̇ze edi̇lmi̇ş yapiya sahi̇p sifir derece bölmesi̇ i̇çeren soğutucu ci̇haz
PCT/TR2017/050348 WO2018063127A2 (en) 2016-08-12 2017-07-26 Refrigeration appliance with zero-degree compartment having optimized structure for cooling

Publications (2)

Publication Number Publication Date
EP3497386A2 EP3497386A2 (de) 2019-06-19
EP3497386B1 true EP3497386B1 (de) 2020-12-02

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EP17851898.1A Active EP3497386B1 (de) 2016-08-12 2017-07-26 Kältegerät mit null-grad-fach mit optimierter kühlstruktur

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EP (1) EP3497386B1 (de)
PL (1) PL3497386T3 (de)
TR (1) TR201611337A3 (de)
WO (1) WO2018063127A2 (de)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101146274B1 (ko) * 2005-09-01 2012-05-16 주식회사 대우일렉트로닉스 투도어 타입 냉장고의 야채실 온도조절장치

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2297581A (en) * 1940-07-25 1942-09-29 Philco Corp Refrigerator
JP3751075B2 (ja) * 1996-06-06 2006-03-01 松下冷機株式会社 冷蔵庫
WO1999043998A1 (en) * 1998-02-24 1999-09-02 Matsushita Refrigeration Company Storage container for use in refrigerator
EP1811251A2 (de) * 2006-01-18 2007-07-25 Samsung Electronics Co., Ltd. Kühlschrank mit Temperaturregelung und Betriebsverfahren dafür

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101146274B1 (ko) * 2005-09-01 2012-05-16 주식회사 대우일렉트로닉스 투도어 타입 냉장고의 야채실 온도조절장치

Also Published As

Publication number Publication date
EP3497386A2 (de) 2019-06-19
PL3497386T3 (pl) 2021-08-02
WO2018063127A3 (en) 2018-07-05
WO2018063127A2 (en) 2018-04-05
TR201611337A3 (tr) 2018-03-21

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