EP4001810B1 - Refrigerator with an improved preservation of vegetables and fruits and a corresponding method - Google Patents

Refrigerator with an improved preservation of vegetables and fruits and a corresponding method Download PDF

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Publication number
EP4001810B1
EP4001810B1 EP21200078.0A EP21200078A EP4001810B1 EP 4001810 B1 EP4001810 B1 EP 4001810B1 EP 21200078 A EP21200078 A EP 21200078A EP 4001810 B1 EP4001810 B1 EP 4001810B1
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EP
European Patent Office
Prior art keywords
period
sound
refrigerator
predetermined period
during
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
Application number
EP21200078.0A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP4001810A1 (en
Inventor
Meltem SAHIN
Aylin MET
Husnu Kerpicci
Esra TUZEL
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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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
    • F25D29/00—Arrangement or mounting of control or safety devices
    • 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
    • F25D2327/00—Lighting arrangements not provided for in other groups of this subclass
    • 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
    • F25D27/00—Lighting arrangements
    • F25D27/005—Lighting arrangements combined with control means

Definitions

  • the present invention relates to a refrigerator and a method of controlling the refrigerator wherein sound technology is used for preserving freshness and nutrition of vegetables and fruits stored in a compartment of the refrigerator.
  • United States patent application US2008066475A1 discloses a refrigerator which uses illumination technology for food preservation.
  • Document JP2006254835 A discloses all the technical features from the preamble of the independent claim 1. Further relevant prior art documents are JP2017083120 A , JP2013170760 A , KR20050043828 A , KR20090002540 A and JPH09191836 A .
  • the aim of the present invention is realization of a refrigerator and a control method thereof, wherein freshness and nutrition of vegetables and fruits are preserved for an extended time by simulating preharvest ambient conditions.
  • An objective of the invention is to provide a refrigerator wherein sound technology is used in stimulating vegetables and fruits in order to extend their shelf lives.
  • a related objective is to increase customer satisfaction by preserving natural taste and smell of vegetables and fruits for an extended period, in a cost effective and eco-friendly manner.
  • the at least one sound source is adapted to apply soundwaves into the compartment for extending shelf life of vegetables and fruits stored therein.
  • the control unit is configured to control operation of said at least one sound source according to a 24-hour cycle comprising a daytime period (Td) and a nighttime period (Tn).
  • the control unit is configured to activate said at least one sound source such that the sound source outputs at least one type of biophonic sound for at least one predetermined period during the daytime period (Td) and such that the sound source does not output said at least one type of biophonic sound during the nighttime period (Tn). In this way, periodical ambient sounds in preharvest conditions of plants can be simulated.
  • the at least one type of sound comprises biophonic sounds, such as sounds of insects, birds, etc.
  • the control unit is configured to control said at least one sound source such that the sound source outputs biophonic sounds for a first predetermined period (T1) at the beginning of the daytime period (Td) and for a third predetermined period (T3) at the end of the daytime period (Td), but does not output any biophonic sound for a second predetermined period (T2) between the first and third predetermined periods (T1, T3).
  • Biophonic sounds are thus applied at specific intervals of the daily cycle where they occur most intensely in nature, which helps better imitating natural sound cycles.
  • the at least one type of sound may additionally comprise a background sound at a frequency range between 50 Hz - 20kHz.
  • the background sound may be designed to represent the combination of sounds in the background, like a background noise.
  • the at least one type of sound may further comprise non-biophonic sounds, such as sound of rain, wind, or sounds arising from human activity. By combining biophonic, non-biophonic, and background sounds, a more realistic ambient sound simulation can be obtained. This helps better stimulation of vegetables and fruits, providing improved preservation in the refrigerator.
  • the refrigerator further comprises at least one light source for stimulating vegetables and fruits stored in the compartment with light.
  • the control unit may be further configured to control operation of said at least one light source in accordance with operation of the sound source.
  • the control unit can control the light source and the sound source such that one or more instances of activation, deactivation and/or a change of operating state of these sources coincide. Vegetables and fruits being treated both by sound and light are exposed to enhanced stimulation and their shelf life and nutrition can be preserved for further extended time.
  • the control unit may be configured to activate said at least one light source during the daytime period (Td) and deactivate said at least one light source during the nighttime period (Tn).
  • the control unit may be configured to control said at least one light source such that the light source emits light at a first wavelength for a first predetermined period (T1') at the beginning of the daytime period (Td), at a second wavelength for a second predetermined period (T2') in the middle of the daytime period (Td), and at a third wavelength for a third predetermined period (T3') at the end of the daytime period (Td).
  • Duration and/or start times of first, second and third predetermined periods used for operating the sound source (T1, T2, T3) and those used for the light source (T1', T2', T3') may be the same.
  • a method according to the independent claim 10 of controlling the refrigerator of any of the claims 1-9.
  • the method according to claim 10 comprises: starting the method, playing biophonic sounds during a first predetermined period (T1) at the beginning of a daytime period (Td), stopping biophonic sounds during a second predetermined period (T2) in the middle of the daytime period (Td), playing biophonic sounds during a third predetermined period (T3) at the end of the daytime period (Td), and stopping biophonic sounds during a fourth predetermined period (T4) during a nighttime period (Tn).
  • biophonic sounds for treating the vegetables and fruits are applied at the first predetermined period (T1) and the third predetermined period (T3).
  • Biophonic sounds are not played by the control unit at the second and fourth predetermined periods (T2, T4).
  • the method may further comprise: playing background sound and/or non-biophonic sounds during the daytime period (Td), preferably during the first, second and third predetermined periods (T1, T2, T3) continuously, and stopping the background sound and/or non-biophonic sounds during the fourth predetermined period (T4) during the nighttime period (Tn).
  • the refrigerator further comprises at least one light source for stimulating vegetables and fruits stored in the compartment with light
  • the method further comprises: stimulating vegetables and fruits stored in the compartment according to claim 12.
  • the method may further comprise: emitting light at a first wavelength for a first predetermined period (T1') at the beginning of the daytime period (Td), emitting light at a second wavelength for a second predetermined period (T2') in the middle of the daytime period (Td), emitting light at a third wavelength for a third predetermined period (T3') at the end of the daytime period (Td), and stop emitting light during a fourth predetermined period (T4') during a nighttime period (Tn).
  • the refrigerator (1) comprises a compartment (2) for storing vegetables and fruits therein, and a control unit (3) designed to control functioning of the refrigerator (1).
  • the refrigerator (1) further comprises at least one sound source (4) for stimulating vegetables and fruits stored in the compartment (2) with biophonic sound waves.
  • the control unit (3) is configured to control operation of said one or more sound source (4) in accordance with claim 1. ( Figure 1 )
  • the control unit (3) may be configured to operate said at least one sound source (4) to output sound waves at frequencies between 50 Hz - 20 kHz, and at a volume between 0 - 110 dB.
  • One or more different types of sounds can be output from said one or more sound source (4).
  • Sounds may comprise recorded, processed, and/or artificially generated sound samples. At least some of the sounds may be stored in a memory, for example as sound files.
  • the refrigerator (1) may comprise a memory module accessible by the control unit (3).
  • One or more sound sources (4) are preferably placed in the compartment (2), for example on a back wall, on at least one side wall, and/or on a cover of the compartment (2). Sound sources (4) may be speakers. Each one of sound sources (4) may be controlled to output different types of sounds or components thereof individually or in combination.
  • the control unit (3) is configured to control operation of the sound source (4) according to a 24-hour cycle comprising a daytime period (Td) and a nighttime period (Tn).
  • the control unit (3) is further configured to control the sound source (4) such that the sound source (4) does not output said at least one type of biophonic sound during the nighttime period (Tn).
  • control unit (3) There may be more than one type of sounds played by the sound source (4) under control of the control unit (3).
  • a specific type of sound may also comprise several sound components, such as separate audio channels.
  • the control unit (3) is arranged to control each one of sound types and each component therein individually. Accordingly, the control unit (3) can start, stop, adjust the volume of a specific type of sound and/or an individual sound component therein independently.
  • the daytime period (Td) and the nighttime period (Tn) are defined as complementary parts of a 24-hour period.
  • the daytime period (Td) includes, but is not limited to, the time interval between consecutive sunrise and sunset times.
  • the daytime period (Td) extends to additionally include a certain time period immediately before the sunrise and/or immediately after the sunset. Thus, the daytime period may cover the time period between dawn and dusk.
  • a type of sound employed in the invention is biophonic sounds. These non-human sounds produced by living organisms in nature may comprise sounds of birds and insects.
  • Biophonic sounds used by the refrigerator (1) are preferably pre-recorded sounds and may be grouped into components or sub-files.
  • one or more sound sources (4) may be controlled by the control unit (3) to output sounds of birds and sounds of insects at different times, for different durations, and/or at different volumes, in order to reflect the sound patterns observed in the nature.
  • the daytime period (Td) is considered to comprise three predetermined periods (T1, T2, T3) at the beginning, middle, and end of it.
  • the three predetermined periods (T1, T2, T3) add up to the daytime period (Td).
  • the first predetermined period (T1) is a period around the time of sunrise
  • the second predetermined period (T2) is a period around noon
  • the third predetermined period (T3) is a period around the time of sunset.
  • Each one of these predetermined periods can have a duration of up to six hours.
  • said periods may cover the following times: T1 (4 am - 10 am), T2 (10 am - 4 pm), T3 (4 pm - 8 pm), Tn (8 pm - 4 am).
  • Td, T1, T2, T3, and Tn are defined and stored in a memory unit in a manner accessible by the control unit (3). Given that the timing of biophonic sounds in nature are dependent on sunrise and sunset, each one of predefined periods may be dynamically adjusted according to current time of the year and/or a current location.
  • the control unit (3) may be configured to carry out the adjustment automatically.
  • the control unit (3) is configured to control said at least one sound source (4) such that the sound source (4) outputs biophonic sounds for the first predetermined period (T1) and for the third predetermined period (T3), but does not output any biophonic sound for the second predetermined period (T2).
  • T1 first predetermined period
  • T3 third predetermined period
  • T2 second predetermined period
  • the refrigerator (1) may use a background sound.
  • the background sound can be output continuously, periodically, or intermittently.
  • the background sound is preferably output during the daytime period (Td) and lowered or muted during the nighttime period (Tn).
  • the background sound may be at a fixed frequency between 50 Hz - 20 kHz, or at certain frequency range therein.
  • Non-biophonic sounds may comprise the sound of rain, wind and sounds produced by human activity.
  • Non-biophonic sounds may be pre-recorded sounds and may be grouped into components or sub-files, each of which may be output at different times, for different durations, and/or at different volumes, in order to reflect the sound patterns observed in the nature.
  • refrigerator (1) further comprises at least one light source (5) for stimulating vegetables and fruits stored in the compartment (2) with light.
  • the control unit (3) is further configured to control operation of said at least one light source (5) in accordance with operation of the sound source (4).
  • the control unit (3) controls the light source (5) to emit light preferably at a wavelength between 400 nm and 730 nm. Combined application of sound waves and light further enhances the simulation of ambient conditions in the nature. The synergistic effect of sound and light treatment provides further extended preservation of freshness and nutrition of vegetables and fruits.
  • the control unit (3) may be configured to activate said at least one light source (5) during the daytime period (Td).
  • the control unit (3) may be further configured to deactivate or dim said at least one light source (5) during the nighttime period (Tn).
  • the control unit (3) may be configured to control said at least one light source (5) such that the light source (5) emits light at a first wavelength for a first predetermined period (T1') at the beginning of the daytime period (Td), at a second wavelength for a second predetermined period (T2') in the middle of the daytime period (Td), and at a third wavelength for a third predetermined period (T3') at the end of the daytime period (Td). Emission of light at different wavelengths during different periods of the daytime period (Td) imitates the effect of sunlight changing along the day.
  • the first wavelength is between 400 nm and 520 nm
  • the second wavelength is between 520 nm and 610 nm
  • the third wavelength is between 610 nm and 730 nm.
  • the method according to claim 10 of controlling the refrigerator (1) comprises: starting (100) the method, playing (111) biophonic sounds during the first predetermined period (T1), stopping (112) biophonic sounds during the second predetermined period (T2), playing (113) biophonic sounds during the third predetermined period (T3), and stopping (114) biophonic sounds during the fourth predetermined period (T4).
  • playing the sound denotes stimulating the food in the compartment (2) with soundwaves propagating from at least one sound source (4).
  • Stopping the sound means muting a respective sound such that vegetables or fruits in the compartment (2) are not stimulated with soundwaves of respective sound.
  • the method may start (100), when the refrigerator (1) is energized, at a predefined point of time within the 24-hour cycle, for example with the beginning of the daytime period (Td).
  • the method starts (100) at a point corresponding to a current time, such as clock time transmitted to the control unit (3) from an internal clock of the refrigerator; or from a point selected by the user.
  • the method may further comprise playing (121, 131) background sound and/or non-biophonic sounds during the daytime period (Td), and stopping (122, 132) the background sound and/or non-biophonic sounds during the fourth predetermined period (T4) during the nighttime period (Tn).
  • the fourth predetermined period (T4) may be the entire nighttime period (Tn).
  • the method further comprises stimulating vegetables and fruits stored in the compartment (2) with the light source (4) in accordance with claim 12.
  • sound and light stimulation are applied based on the same cycle, and in one or more of the predetermined time periods (Td, T1, T2, T3) at the same time.
  • the method may further comprise emitting (141) light by the light source (5) at a first wavelength for the first predetermined period (T1'), emitting (142) light by the light source (5) at a second wavelength for the second predetermined period (T2'), emitting (143) light by the light source (5) at a third wavelength for the third predetermined period (T3'), and stopping emitting (144) light by the light source (5) during the fourth predetermined period (T4').
  • the first wavelength is between 400 nm and 520 nm
  • the second wavelength is between 520 nm and 610 nm
  • the third wavelength is between 610 nm and 730 nm.
  • Emitting light denotes stimulating the food in the compartment (2) with light from at least one light source (5). Stopping emitting light, on the other hand, means discontinuing treatment of vegetables or fruits in the compartment (2) with light for the respective time period.
  • respective predetermined periods for sound stimulation (T1, T2, T3, T4) and starting time thereof are the same as those for light stimulation (T1', T2', T3', T4').
  • at least one of the starting times and/or duration of predetermined periods for application of sound and light differs by a predefined time margin.
  • All the steps of the method of controlling the refrigerator (1) are carried out automatically by the control unit (3) and one or more sound source (4) and light source (5) are controlled by the control unit (3).
  • the present invention freshness and nutrition of vegetables and fruits are preserved for longer by simulating, within the refrigerator (1), sound cycles in growing habitats of fruits and vegetables.
  • different types of sounds with varying audio characteristics are applied to the compartment (2) with a time pattern reflecting the nature.
  • the preservation effect is further improved by combining sound stimulation with light stimulation, both being preferably aligned with the same 24-hour cycle.

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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)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
  • Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
EP21200078.0A 2020-11-11 2021-09-30 Refrigerator with an improved preservation of vegetables and fruits and a corresponding method Active EP4001810B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TR2020/18030A TR202018030A2 (tr) 2020-11-11 2020-11-11 Sebze ve meyve korumasi i̇yi̇leşti̇ri̇len buzdolabi

Publications (2)

Publication Number Publication Date
EP4001810A1 EP4001810A1 (en) 2022-05-25
EP4001810B1 true EP4001810B1 (en) 2023-09-06

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EP21200078.0A Active EP4001810B1 (en) 2020-11-11 2021-09-30 Refrigerator with an improved preservation of vegetables and fruits and a corresponding method

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EP (1) EP4001810B1 (tr)
TR (1) TR202018030A2 (tr)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3533803B2 (ja) * 1996-01-22 2004-05-31 松下電器産業株式会社 食品の調理または保存装置
KR20040052787A (ko) * 2004-05-03 2004-06-23 김동환 멀티미디어장치가 내장된 냉장고
JP2006254835A (ja) * 2005-03-18 2006-09-28 Matsushita Electric Ind Co Ltd 農作物の保存方法ならびに農作物の保存庫および冷蔵庫
US7866171B2 (en) 2006-09-20 2011-01-11 Lg Electronics Inc. Food keeping refrigerator
KR100923306B1 (ko) * 2007-07-02 2009-10-23 원종문 멀티미디어 시스템이 구비된 컨테이너
JP2013170760A (ja) * 2012-02-21 2013-09-02 Toshiba Corp 冷蔵庫
KR101791563B1 (ko) 2015-05-11 2017-11-02 대한민국 음파를 이용한 과실의 성숙을 지연시키는 방법
JP6176307B2 (ja) * 2015-10-30 2017-08-09 三菱電機株式会社 冷蔵庫

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TR202018030A2 (tr) 2022-05-23

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