EP2724097B1 - A cooling device preventing freezing of foodstuffs placed in the fresh food compartment - Google Patents
A cooling device preventing freezing of foodstuffs placed in the fresh food compartment Download PDFInfo
- Publication number
- EP2724097B1 EP2724097B1 EP12729659.8A EP12729659A EP2724097B1 EP 2724097 B1 EP2724097 B1 EP 2724097B1 EP 12729659 A EP12729659 A EP 12729659A EP 2724097 B1 EP2724097 B1 EP 2724097B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- temperature
- fresh food
- food compartment
- heater
- detected
- 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.)
- Active
Links
- 235000013305 food Nutrition 0.000 title claims description 109
- 238000001816 cooling Methods 0.000 title claims description 40
- 238000007710 freezing Methods 0.000 title claims description 24
- 230000008014 freezing Effects 0.000 title claims description 24
- 239000003507 refrigerant Substances 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims description 2
- 238000005057 refrigeration Methods 0.000 claims description 2
- 230000007423 decrease Effects 0.000 description 3
- 239000000155 melt Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000010257 thawing Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 235000013361 beverage Nutrition 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 235000013311 vegetables Nutrition 0.000 description 1
Images
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
- F25D29/00—Arrangement or mounting of control or safety devices
Definitions
- the present invention relates to a cooling device that prevents freezing of foodstuffs placed in the fresh food compartment.
- cooling devices particularly in refrigerators, foodstuffs like vegetables, fruits and beverages are generally placed into the fresh food compartment and these foodstuffs are not desired to be frozen.
- the ambient temperature is low, for example when lower than 0°C
- the temperature of the fresh food compartment decreases towards minus values even if the compressor, providing the cooling of the fresh food compartment, does not operate and causes the foodstuffs therein to be frozen.
- heaters are used that are generally disposed at the rear side of the fresh food compartment. But in very low ambient temperatures (for example at -15°C') even though the regions around the heater are raised to desired temperature values, a homogeneous heat distribution within the fresh food compartment cannot be provided and minus temperature values are encountered in some places. When the power of the heater is increased, the place around the heater is overheated and rises to high temperature values. Therefore, cooling devices are being developed that use two heaters at the same time inside the fresh food compartment.
- a cooling device that comprises two heaters, one on the refrigerating chamber evaporator, the other disposed on the water discharge outlet of the refrigerating chamber.
- the power of the heater disposed on the refrigerating chamber evaporator is higher than the heater disposed on the water discharge outlet.
- Japanese Patent Document No. JP2010230223 a cooling device with adjacent doors is described. There are two heaters in the cooling device, one at the defrost exit, the other on the side wall, both operating together. When the outside air temperature is very low, the microprocessor detects the temperature difference between the freezing chamber and the refrigerating chamber and adjusts the power of the heaters.
- Document US5842 355A discloses a cooling device according to the preamble of claim 1.
- the aim of the present invention is the realization of a cooling device wherein the fresh food compartment is cooled effectively even at very low ambient temperatures and the foodstuffs placed therein are prevented from freezing.
- At least one fresh food compartment a compressor, at least one evaporator, an evaporator temperature sensor, a fresh food compartment temperature sensor, a control unit and a first heater and a second heater, both positioned to heat the interior of the fresh food compartment are disposed.
- the first heater is disposed on the evaporator and the second heater at the bottom of the fresh food compartment.
- the control unit controls the temperature detected by the fresh food compartment temperature sensor in order to activate the compressor.
- the compressor is activated or deactivated depending on the temperature value detected by the fresh food compartment temperature sensor.
- the control unit cuts in the first heater.
- the temperature detected by the fresh food compartment temperature sensor falling below zero and the freezing of the foodstuffs in the fresh food compartment are prevented.
- the control unit cuts out the first heater when the temperature detected by the fresh food compartment temperature sensor reaches the cut-out temperature of the heaters. Since the cut-out temperature of the heaters is lower than the compressor cut-in temperature, the first heater can be operated again before the compressor is activated depending on the ambient temperature.
- the second heater is activated when the temperature detected by the fresh food compartment temperature sensor reaches the second heater cut-in temperature predetermined by the producer.
- a more effective heating is provided in the fresh food compartment and freezing is prevented.
- the temperature detected by the fresh food compartment temperature sensor is fixed between the second heater cut-in temperature predetermined by the producer and the cut-out temperature of the heaters while the first heater is operating.
- the second heater is activated at the end of the threshold time predetermined by the producer in order to prevent the first heater from operating for a long time. As the second heater operates, the temperature detected by the fresh food compartment temperature sensor rises, reaching the cut-out temperature of the heaters and both of the heaters are deactivated.
- both of the heaters are deactivated.
- the first heater is disposed at the lower side of the evaporator.
- the first heater is almost aligned with the center of the fresh food compartment.
- the heat radiated from the heater is dissipated homogeneously inside the fresh food compartment.
- the collection container is disposed at the front side of the first heater. The frost around the evaporator is collected in the collection container and melts when the first heater is operated.
- the second heater is positioned at a place near the lower side of the fresh food compartment.
- a homogeneous heat distribution is maintained while the two heaters operate together since the first heater is disposed at the center of the fresh food compartment and the second heater at the lower part of the fresh food compartment. Consequently, while some portion of the fresh food compartment has temperature values above zero, another portion is prevented from falling below zero.
- a fan is disposed in the cooling device which blows air into the fresh food compartment.
- the fan is preferably disposed on the evaporator at a place near the first heater.
- the fan propels the cold air while the compressor operates, propels the hot air while the first heater operates and in both cases provides the heat in the fresh food compartment to be distributed homogeneously.
- a freezing compartment is present wherein the food stuffs desired to be frozen are placed.
- a freezing compartment evaporator that provides cooling is disposed at the rear side of the freezing compartment.
- a first heater is situated on both of the evaporators and a second heater is placed so as to heat only the interior of the fresh food compartment.
- the foodstuffs placed in the fresh food compartment are provided not to freeze even at very low ambient temperatures and an effective cooling is maintained. Furthermore, energy saving is provided by optimizing the operation times of the heaters and the compressor.
- the cooling device (1) comprises at least one fresh food compartment (2) wherein foodstuffs to be cooled are placed, a compressor (3) that compresses and circulates the refrigerant fluid in the refrigeration cycle, at least one evaporator (4) that provides the cooling of the interior volume of the fresh food compartment (2) by absorbing the thermal energy, a fresh food compartment temperature sensor (5) that measures the temperature in the fresh food compartment (2), an evaporator temperature sensor (6) that measures the temperature on the evaporator (4), a first heater (7) disposed on the evaporator (4), a second heater (8) disposed at the rear side of the fresh food compartment (2) so as to heat the fresh food compartment (2) and a control unit (9) ( Figure 1 ).
- the evaporator (4) threshold temperature (T EVAcr ) predetermined by the producer is preferably +4°C approximately whereat the frost around the evaporator (4) is almost entirely eliminated.
- the compressor (3) cut-in temperature (T Rcut-in ) is +5.5°C and the compressor (3) cut-out temperature (T Rcut-out ) is +4.5°C.
- the control unit (9) compares the temperature (T R ) detected by the fresh food compartment temperature sensor (5) with the first heater (7) cut-in temperature (T 1cut-in ) predetermined by the producer and cuts in the first heater (7) when the temperature (T R ) detected by the fresh food compartment temperature sensor (5) reaches the first heater (7) cut-in temperature (T 1cut-in ) predetermined by the producer.
- the temperature (T R ) detected by the fresh food compartment temperature sensor (5) is prevented from reaching minus values and the foodstuffs placed in the fresh food compartment (2) is prevented from freezing.
- the first heater (7) cut-in temperature (T 1cut-in ) is lower than the compressor (3) cut-out temperature (T Rcut-out ).
- the first heater (7) cut-in temperature (T 1cut-in ) is preferably +4 °C.
- the control unit (9) compares the temperature (T R ) detected by the fresh food compartment temperature sensor (5) with the cut-out temperature (T 1,2cut-out ) of the heaters (7, 8) predetermined by the producer and cuts out the first heater (7) when the temperature (T R ) detected by the fresh food compartment temperature sensor (5) reaches the cut-out temperature (T 1,2cut-out ) of the heaters (7, 8) predetermined by the producer.
- the first heater (7) is prevented from operating when not required and energy saving is provided.
- the cut-out temperature (T 1,2cut-out ) of the heaters (7, 8) is lower than the compressor (3) cut-in temperature (T Rcut-in ). Consequently, the compressor (3) is prevented from operating when not required.
- the control unit (9) compares the temperature (T R ) detected by the fresh food compartment temperature sensor (5) with the second heater (8) cut-in temperature (T 2cut-in ) predetermined by the producer and cuts in the second heater (8) when the temperature (T R ) detected by the fresh food compartment temperature sensor (5) reaches the second heater (8) cut-in temperature (T 2cut-in ) predetermined by the producer.
- the second heater (8) is activated and provides the temperature (T R ) detected by the fresh food compartment temperature sensor (5) to remain at the level of preventing the foodstuffs placed in the fresh food compartment (2) from freezing.
- the second heater (8) cut-in temperature (T 2cut-in ) is preferably +2°C.
- the control unit (9) cuts in the second heater (8) even if the temperature (T R ) detected by the fresh food compartment temperature sensor (5) does not reach the second heater (8) cut-in temperature (T 2cut-in ).
- the second heater (8) When the temperature (T R ) detected by the fresh food compartment temperature sensor (5) is balanced between the second heater (8) cut-in temperature (T 2cut-in ) and the cut-out temperature (T 1,2cut-out ) of the heaters (7, 8), the second heater (8) is activated at the end of the threshold time (t) predetermined by the producer and the heaters (7, 8) are deactivated by bringing the temperature (T R ) detected by the fresh food compartment temperature sensor (5) to the cut-out temperature (T 1,2cut-out ) of the heaters (7, 8) and thus energy saving is provided.
- the control unit (9) compares the temperature (T R ) detected by the fresh food compartment temperature sensor (5) with the cut-out temperature (T 1,2cut-out ) of the heaters (7,8) predetermined by the producer and cuts out the heaters (7, 8) when the temperature (T R ) detected by the fresh food compartment temperature sensor (5) reaches the cut-out temperature (T 1,2cut-out ) of the heaters (7, 8) predetermined by the producer.
- the heaters (7, 8) are deactivated before the compressor (3) is activated.
- the compressor (3) is prevented from operating unnecessarily and energy saving is maintained.
- the first heater (7) is disposed at the lower side of the evaporator (4) so as to align almost with the center of the rear wall of the fresh food compartment (2).
- the evaporator (4) extends from the upper side of the fresh food compartment (2) towards the center behind the rear wall of the fresh food compartment (2). Accordingly, both the frost on the evaporator (4) is eliminated and also the interior of the fresh food compartment (2) is heated.
- the cooling device (1) comprises at least one collection container (10) wherein the frost accumulating around the evaporator (4) fall and the first heater (7) located behind the collection container (10).
- the frost around the evaporator (4) falls off and is collected in the collection container (10) during the defrosting process.
- the frost in the collection container (10) melts and provides completion of the defrosting process.
- the second heater (8) is placed so as to align with the lower part of the rear wall of the fresh food compartment (2).
- the first heater (7) and the second heater (8) have preferably the same power.
- the first heater (7) is aligned with the central part of the fresh food compartment (2), when the heaters (7, 8) operate together, the interior of the fresh food compartment (2) is heated homogeneously and the effectiveness of the cooling device (1) is increased.
- the cooling device (1) comprises at least one fan (11) that provides the air in the fresh food compartment (2) to be propelled.
- the fan (11) can operate simultaneously with the heaters (7,8) and the compressor (3).
- the cooling device (1) comprises a freezing compartment (12) wherein the foodstuffs are placed for freezing, kept at lower temperatures then the fresh food compartment (2) and a freezing compartment evaporator (13) that provides the cooling of the interior volume of the freezing compartment (12) by absorbing the thermal energy.
- the refrigerant pumped from the compressor (3) circulates through both evaporators (4, 13) ( Figure 2 ).
- the foodstuffs in the fresh food compartment (2) can be stored without freezing even in very low ambient temperatures. Furthermore, both cooling effectiveness is increased and also energy saving is provided by utilizing the first heater (7), the second heater (8) and the compressor (3) in a controlled manner.
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)
- Devices That Are Associated With Refrigeration Equipment (AREA)
- Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL12729659T PL2724097T3 (pl) | 2011-06-27 | 2012-06-27 | Urządzenie chłodzące zapobiegające zamrażaniu artykułów spożywczych umieszczonych w komorze na świeżą żywność |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TR2011/06333A TR201106333A2 (tr) | 2011-06-27 | 2011-06-27 | Soğutucu bölme içerisine yerleştirilen gıdaların donmasını engelleyen bir soğutucu. |
PCT/EP2012/062504 WO2013000969A2 (en) | 2011-06-27 | 2012-06-27 | A cooling device preventing freezing of foodstuffs placed in the fresh food compartment |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2724097A2 EP2724097A2 (en) | 2014-04-30 |
EP2724097B1 true EP2724097B1 (en) | 2015-08-26 |
Family
ID=46354385
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12729659.8A Active EP2724097B1 (en) | 2011-06-27 | 2012-06-27 | A cooling device preventing freezing of foodstuffs placed in the fresh food compartment |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP2724097B1 (ru) |
CN (1) | CN103635769B (ru) |
PL (1) | PL2724097T3 (ru) |
RU (1) | RU2556716C1 (ru) |
TR (1) | TR201106333A2 (ru) |
WO (1) | WO2013000969A2 (ru) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104990346B (zh) * | 2015-06-30 | 2017-05-10 | 重庆唐森机械制造有限公司 | 一种冰箱的冷藏室内壁 |
CN105605847A (zh) * | 2016-03-04 | 2016-05-25 | 广东格兰仕集团有限公司 | 直冷冷藏冰箱及其控温方法和除霜方法 |
CN106969594A (zh) * | 2017-05-03 | 2017-07-21 | 合肥美的电冰箱有限公司 | 保鲜控制方法、制冷系统和冰箱 |
CN107421233B (zh) * | 2017-06-09 | 2019-10-29 | 合肥华凌股份有限公司 | 防止食物冻结的控制方法、控制装置和冰箱 |
CN110940146A (zh) * | 2019-10-10 | 2020-03-31 | 合肥晶弘电器有限公司 | 一种具有食品不冻结功能的存储方法、冰箱 |
CN110906654A (zh) * | 2019-10-10 | 2020-03-24 | 合肥晶弘电器有限公司 | 一种过冷却不冻结储存的控制方法和冰箱 |
CN110906658A (zh) * | 2019-10-10 | 2020-03-24 | 合肥晶弘电器有限公司 | 一种食品不冻结储存控制方法及冰箱 |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA2160338C (en) * | 1994-10-13 | 2003-09-23 | Kenneth W. Oden | Electronic refrigeration control system |
US5842355A (en) * | 1995-03-22 | 1998-12-01 | Rowe International, Inc. | Defrost control system for a refrigerator |
JPH1144474A (ja) * | 1997-06-17 | 1999-02-16 | Samsung Electron Co Ltd | 冷蔵庫及びその制御方法 |
DE19828061C1 (de) * | 1998-06-24 | 1999-12-23 | Danfoss As | Verfahren zur Regelung der Temperatur eines Kühlmöbels und Temperaturregelvorrichtung für ein Kühlmöbel |
JP2001215077A (ja) * | 2000-02-02 | 2001-08-10 | Hitachi Ltd | 除霜制御装置と制御方法、および冷蔵庫 |
CN1239873C (zh) * | 2002-06-06 | 2006-02-01 | 乐金电子(天津)电器有限公司 | 多级温控电冰箱温度控制方法 |
RU2228494C1 (ru) * | 2002-10-31 | 2004-05-10 | Общество с ограниченной ответственностью "Медтехника-М" | Термостат для хранения биологических субстанций |
JP5431763B2 (ja) | 2009-03-26 | 2014-03-05 | ハイアールアジアインターナショナル株式会社 | 冷凍冷蔵庫 |
CN101922837B (zh) | 2009-06-10 | 2013-08-14 | 海信(北京)电器有限公司 | 大冷冻能力冰箱 |
-
2011
- 2011-06-27 TR TR2011/06333A patent/TR201106333A2/xx unknown
-
2012
- 2012-06-27 CN CN201280031958.6A patent/CN103635769B/zh not_active Expired - Fee Related
- 2012-06-27 PL PL12729659T patent/PL2724097T3/pl unknown
- 2012-06-27 RU RU2014102417/13A patent/RU2556716C1/ru not_active IP Right Cessation
- 2012-06-27 EP EP12729659.8A patent/EP2724097B1/en active Active
- 2012-06-27 WO PCT/EP2012/062504 patent/WO2013000969A2/en active Application Filing
Also Published As
Publication number | Publication date |
---|---|
TR201106333A2 (tr) | 2013-01-21 |
WO2013000969A3 (en) | 2013-03-14 |
CN103635769B (zh) | 2015-11-25 |
WO2013000969A2 (en) | 2013-01-03 |
CN103635769A (zh) | 2014-03-12 |
RU2556716C1 (ru) | 2015-07-20 |
PL2724097T3 (pl) | 2016-02-29 |
EP2724097A2 (en) | 2014-04-30 |
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