WO2014041590A1 - Réfrigérateur et procédé de réfrigération - Google Patents

Réfrigérateur et procédé de réfrigération Download PDF

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Publication number
WO2014041590A1
WO2014041590A1 PCT/JP2012/007572 JP2012007572W WO2014041590A1 WO 2014041590 A1 WO2014041590 A1 WO 2014041590A1 JP 2012007572 W JP2012007572 W JP 2012007572W WO 2014041590 A1 WO2014041590 A1 WO 2014041590A1
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Prior art keywords
refrigerated
refrigerator
refrigeration
airflow
filter
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PCT/JP2012/007572
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English (en)
Japanese (ja)
Inventor
岳志 加納
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ダイワ・インターナショナル株式会社
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Publication of WO2014041590A1 publication Critical patent/WO2014041590A1/fr

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    • 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

Definitions

  • the present invention relates to a refrigerator and a refrigeration method for refrigerated storage of food, foodstuffs, beverages and other objects to be cooled.
  • the present invention relates to a refrigerator and a refrigeration method for refrigeration of food and the like.
  • “refrigeration” refers to cooling a substance in a state where moisture in the substance does not freeze.
  • “refrigeration” is a temperature state within a range from the freezing point of a substance to room temperature.
  • “refrigeration” is a temperature state in the range from minus 3 ° C. to room temperature.
  • Room temperature is a natural temperature that does not heat or cool the material.
  • “Ice temperature” is a temperature in the range from around 0 ° C., the temperature at which water freezes, to the freezing point of the substance.
  • the “ice temperature” is a temperature state in the range from minus 3 ° C. to around 0 ° C. That is, the “ice temperature” is a temperature range below about 0 ° C. in the “refrigeration”.
  • “Frozen” is to cool a substance in a state where moisture in the substance is frozen. Specifically, “freezing” is a temperature state below the freezing point of a substance. If the material has a freezing point of minus 3 ° C., “freezing” is in a temperature state below minus 3 ° C.
  • a substance that is intended to be frozen may be referred to as an object to be frozen.
  • a substance intended to be refrigerated among substances to be cooled may be referred to as a refrigerated object.
  • the object to be frozen and the object to be refrigerated are sometimes collectively referred to as an object to be cooled.
  • Patent Document 2 a technique for forming an alternating electric field while electrically insulating a storage object is known (for example, Patent Document 2).
  • “Aging” means to activate the action of an enzyme to soften meat as a food, increase the taste of meat, or adjust the fruit as a food to a seasonal taste.
  • Patent Document 4 there is an idea of realizing aging at the same time while maintaining freshness by refrigeration, but the method disclosed in this document has complicated condition setting and is difficult to realize. There was a problem that there was.
  • the present invention has been made in view of the above-described problems, and can enhance the effect of maintaining freshness for food to be refrigerated, such as foods and foodstuffs, and further ripen at the same time as refrigerated food is refrigerated. It is an object of the present invention to provide a refrigerator and a refrigeration method capable of simply and reliably performing.
  • the refrigerator according to the present invention is a refrigerator that refrigerates an object to be refrigerated placed in a refrigeration space.
  • the refrigerator wall that forms the refrigeration space and has electrical insulation, and the object to be refrigerated Refrigeration means for bringing into an ice temperature state, airflow formation means for forming an airflow in the refrigeration space, electric field application means for applying an alternating electric field to an object to be refrigerated placed in the refrigeration space, and the airflow formation It has a filter which is arranged in the air current formed by the means and which bacterioculates the bacteria contained in the air current.
  • bacteriaostasis is not to kill and reduce bacteria, but to reduce the bacteria by suppressing the growth of bacteria.
  • bacteria that adversely affect the object to be refrigerated such as food poisoning bacteria (for example, O-157, Vibrio parahaemolyticus, Salmonella, Norovirus, etc.), and the object to be refrigerated is aged.
  • suitable bacteria for example, bifidobacteria or lactic acid bacteria
  • the bacteriostatic filter of the present invention appropriately suppresses the presence of food poisoning bacteria and the like, and leaves suitable bacteria for aging.
  • a cold air bacterized by a filter is applied to the object to be cooled, so that the freshness is maintained only by the alternating electric field.
  • the effect of maintaining the freshness of the object to be cooled can be further enhanced.
  • bacteria suitable for aging are imparted to the refrigerated product being refrigerated, so that the enzymes contained in the refrigerated product and the bacteria suitable for aging are This synergistic effect makes it possible to reliably ripen the items to be refrigerated without adding any additives.
  • Aging means to activate the enzyme to soften the meat that is food, increase the taste of the meat, or adjust the fruit that is food to the seasonal taste.
  • the filter is a porous substance that is a substance having a large number of fine pores therein, and the material forming the pores is copper or copper on the surface. It can be a material formed by coating. If it carries out like this, the filter which carries out bacteriostasis of the microbe contained in an airflow can be provided reliably.
  • the metal given to the surface of the porous material is not limited to copper, but a metal capable of bacteriostatic effect (that is, it does not kill and reduce bacteria, but suppresses bacterial growth and reduces bacteria). Any substance can be applied as long as it is a substance. For example, silver can be used instead of copper.
  • the filter is a sponge-like foam having a large number of holes therein, and the copper is fibrous copper or the surface thereof is coated with copper.
  • the material can be a fibrous material. If it carries out like this, the function of the bacteriostatic of the filter which suppresses the proliferation of bacteria and reduces bacteria, not killing and reducing bacteria, can be realized with high ability.
  • the airflow forming means may be a fan that rotates by being driven by an electric motor. If it carries out like this, an airflow formation means can be provided in a refrigerator simply and cheaply.
  • the refrigerator which concerns on this invention WHEREIN can form an alternating electric field by the application of the alternating voltage in the range of 600 volts to 2000 volts, and has the said electrical insulation at the time of this voltage application.
  • the value of current flowing through the storage wall by the wall can be 1 mA or less.
  • the object to be refrigerated is placed in a refrigeration space surrounded by a wall having electrical insulation, the inside of the refrigeration space is set to a refrigeration temperature, and the refrigeration object An air field passing through the object to be refrigerated is formed in the refrigeration space, and a filter capable of performing bacteriostatic action is disposed in the flow path of the air current, and the object to be refrigerated It is characterized by aging while refrigerated.
  • the cold air bacterized by the filter is applied to the object to be cooled, so that the freshness is maintained only by the alternating electric field.
  • the effect of maintaining the freshness of the object to be cooled can be further enhanced.
  • the refrigerator and the refrigeration method according to the present invention since the cold air sterilized by the filter is applied to the object to be cooled in addition to applying the alternating electric field to the object to be cooled, the freshness is obtained only by the alternating electric field.
  • the effect of maintaining the freshness with respect to the object to be cooled can be further enhanced as compared with the refrigerator in which holding is performed.
  • FIG. 2 is a cross-sectional view taken along line AA in FIG.
  • FIG. 2 is a cross-sectional view taken along line AA in FIG.
  • FIG. 2 is a perspective view which shows the state which looked at one Embodiment of the bacteriostatic filter which is main components of said refrigerator from the diagonal direction.
  • FIG. 2 shows the state which looked at the filter for bacteriostatic from another diagonal direction.
  • It is a photograph which shows the result of the experiment conducted using the conventional refrigeration method by making a strawberry into a test substance.
  • Refrigerated space 1. Refrigerator, 2. Warehouse wall, 3a, 3b. Door, 4a, 4b. Handle, 5. Shelf, 6. Refrigerated items, 7. Refrigeration equipment (refrigeration means), 8. Radiator, 9. Fan (airflow forming means), 12. Vinyl chloride board, 13. Control box, 14. Power supply, 15. Filter, B. Airflow, S. Refrigerated space
  • FIG. 1 shows a front view of a refrigerator according to the present invention.
  • FIG. 2 shows a plan view of the refrigerator.
  • FIG. 3 shows a cross-sectional view of the refrigerator according to the arrow AA in FIG.
  • the refrigerator 1 of the present embodiment has a warehouse wall 2 that forms a refrigerator compartment inside.
  • the warehouse wall 2 is a rectangular parallelepiped box which seals the inside, and the front surface (the front surface in FIG. 1 and the left surface in FIG. 3) is an open surface.
  • doors 3 a and 3 b are provided over two upper and lower levels.
  • Handles 4a and 4b are provided on the doors 3a and 3b.
  • the doors 3a and 3b are rotatably attached to the storage wall 2 on the side opposite to the side where the handles 4a and 4b are provided. The user can open and close the doors 3a and 3b by grasping and pulling or pushing the handle 4a or 4b.
  • the space surrounded by the storage wall 2 is a refrigeration space S.
  • the refrigeration space S becomes a sealed space.
  • a plurality of (in this embodiment, three shelves 5 are provided in the refrigeration space S.
  • a vinyl chloride board that is a member for electrical insulation on the entire inner surface of the storage wall 2 and the inner surfaces of the doors 3a and 3b. The surface of the inner wall 2 is electrically insulated by the action of the vinyl chloride board 12.
  • Refrigerated objects 6 such as food and ingredients are placed on the shelf 5.
  • a refrigeration device 7, a radiator (that is, a radiator) 8, a control box 13, and a power source 14 are provided.
  • the control device stored in the control box 13 controls the operation of various electric devices installed with respect to the refrigerator 1.
  • the power source 14 supplies power to various electric devices installed with respect to the refrigerator 1.
  • the refrigeration apparatus 7 as the refrigeration means includes, for example, a condenser (that is, a compressor) and an evaporator (that is, a vaporizer).
  • a fan 9 is provided at the lower part of the refrigeration apparatus 7 as airflow forming means.
  • the fan 9 blows the cold air formed by the refrigeration device 7 as shown by an arrow B, and forms a cold airflow circulating in the refrigeration space S. Due to the formation of cold air by the refrigeration device 7 and the formation of airflow by the fan 9, the inside of the refrigeration space S is set to a temperature suitable for refrigeration of the article 6 to be refrigerated, for example, a temperature suitable for achieving an ice temperature.
  • the ice temperature is a temperature ranging from around 0 ° C. (temperature at which water freezes) to the freezing point of the object to be refrigerated.
  • a temperature suitable for bringing the object 6 to be cooled to an ice temperature is, for example, minus 5 ° C. to 2 ° C., more preferably minus 3 ° C. to 2 ° C.
  • the control device in the control box 13 applies an AC voltage to each shelf 5 using the output voltage of the power supply 14. For example, an appropriate voltage appropriately selected from the range of 600V to 2000V is applied. By applying this AC voltage, an alternating electric field is applied to the object 6 to be refrigerated placed in the refrigeration space S. That is, in the present embodiment, the electric field applying means is configured by a combination of the control device in the control box 13, the power supply 14 and the shelf 5.
  • the method of applying a voltage for forming an alternating electric field in the refrigeration space S is not limited to a specific method, and an appropriate method is selected as necessary.
  • the vinyl chloride board 12 is attached to the inner surface of the warehouse wall 2, even if an alternating electric field is generated in the refrigeration space S, current does not flow outside the warehouse, Or it is 1 mA or less by electric current control.
  • a filter 15 is provided at a position below the refrigeration apparatus 7.
  • the filter 15 is provided in the air flow path formed by the fan 9.
  • the filter 15 may be arranged at an arbitrary position in the refrigeration space S as long as it is in the flow path of the airflow.
  • the filter 15 is a filter functionally capable of bacteriostatic bacteria contained in the airflow. Bacteriostasis is not to kill and reduce bacteria, but to reduce the bacteria by suppressing the growth of bacteria. Bacteria that adversely affect the refrigerated product 6 such as food poisoning bacteria (for example, O-157, Vibrio parahaemolyticus, Salmonella, Norovirus, etc.) may be present in the refrigerator, which is suitable for aging the refrigerated product 6 May be present (for example, bifidobacteria or lactic acid bacteria). The filter 15 appropriately suppresses the presence of food poisoning bacteria and the like, and at the same time, exerts a function of leaving suitable bacteria for aging.
  • food poisoning bacteria for example, O-157, Vibrio parahaemolyticus, Salmonella, Norovirus, etc.
  • the filter 15 appropriately suppresses the presence of food poisoning bacteria and the like, and at the same time, exerts a function of leaving suitable bacteria for aging.
  • the filter 15 is a sponge-like filter as shown in FIGS. 4 and 5, for example.
  • a sponge-like filter is a porous material in which a fibrous material is closely entangled, and a large number of pores are formed between the fibrous materials.
  • the fibrous material itself is made of copper, or the fibrous material is made of an appropriate material and the surface thereof is covered with copper. Such a copper coating can be formed, for example, by immersing a sponge-like foam in a liquid copper solution.
  • the filter 15 is not limited to the sponge-like foam as described above, and has an arbitrary structure and an arbitrary shape having a large number of fine pores therein, that is, an arbitrary structure and an arbitrary porous shape. Any material can be used.
  • copper has a bactericidal action, and is particularly effective if a filter formed by arranging copper on the surface of the fine structure of the porous member is placed in the airflow, as in this embodiment. It was found that fungal selectivity can be obtained.
  • FIG. 3 when the user connects the power source 14 to a predetermined power supply source, for example, a commercial power source, a personal power source facility, etc., the refrigeration device 7, the radiator 8, and the fan 9 are activated, and the refrigeration space of the refrigerator 1 The inside of S is cooled, and airflow B is further formed.
  • the refrigeration space S is set in a refrigerated state, particularly in an ice temperature state, for example, in a temperature range of minus 3 ° C. to 2 ° C.
  • the object to be refrigerated 6 is cooled to the same temperature as the temperature in the refrigeration space S. Specifically, the internal water is cooled to a refrigerated state where it does not freeze. Further, since the power source 14 applies an AC voltage to the shelf 5, an alternating electric field acts on the object 6 to be refrigerated. In this way, the refrigerated object 6 is refrigerated under application of an alternating electric field, whereby the freshness of the refrigerated object 6 is maintained. That is, the object 6 to be refrigerated is kept fresh without rot.
  • the object 6 to be refrigerated is exposed to the airflow that has passed through the filter 15.
  • the filter 15 has a property of suppressing the growth of bacteria (for example, food poisoning bacteria) that are contained in the circulating airflow and adversely affect the refrigerated product 6.
  • bacteria for example, food poisoning bacteria
  • the filter 15 prevents excessive bacteria from being applied to the object 6 to be refrigerated. Can be maintained at a high freshness for an even longer period. That is, this embodiment can achieve a high freshness maintaining effect with respect to the object to be refrigerated 6.
  • the filter 15 by using the filter 15, it is possible to suppress the growth of bacteria that are contained in the airflow circulating in the refrigerator and adversely affect the object to be refrigerated 6. Since suitable bacteria (for example, bifidobacteria or lactic acid bacteria) for aging are not sterilized but are left in the air stream to be applied to the refrigerated object 6, the refrigerated object 6 is properly kept in the refrigerated state. Mature. For example, if the object 6 to be refrigerated is meat, the meat becomes soft and umami increases. Moreover, if the to-be-refrigerated thing 6 is a fruit, the fruit will be adjusted to a seasonal taste. That is, this embodiment can achieve an aging effect while refrigerated object 6 is refrigerated.
  • suitable bacteria for example, bifidobacteria or lactic acid bacteria
  • the object to be refrigerated is kept in an ice temperature state.
  • the cells of the object to be refrigerated store antifreeze.
  • This antifreeze contains free amino acids and sugars. Since free amino acids and sugars are also umami components, they can form a seasonal taste with respect to the items to be refrigerated.
  • the thing to be refrigerated is meat, it can be made soft. This is the effect of aging.
  • a bag that is, a packaging material formed of a film obtained by mixing copper particles in polyethylene is prepared. Or the bag formed with the film formed by mixing a copper particle and a copper oxide particle in polyethylene is prepared.
  • the object 6 to be refrigerated was put in one of these bags. And it put in the space S for refrigeration in the refrigerator 1 in the state which put the to-be-refrigerated thing 6 in the bag.
  • the object to be refrigerated 6 was surely placed in a bacteriostatic environment, and as a result, the object to be refrigerated 6 was kept fresh and further aged appropriately.
  • a synergistic effect was obtained by the combined use of the bacteriostatic filter and the bacteriostatic packaging material.
  • it can replace with a bag and a container can also be used as a packaging material.
  • the shape of the refrigerator is not limited to the shape shown in FIGS. 1 to 3, and can be any other shape.
  • the method for electrically insulating the article 6 to be refrigerated is not limited to attaching the vinyl chloride board 12 to the inner surface of the warehouse wall 2, and any other insulating method can be adopted.
  • the position where the filter 15 is disposed is not limited to the position shown in FIG. 3, and may be any other position on the airflow B. In some cases, the filter 15 does not necessarily have to be on the airflow B as long as the filter 15 is in a position that can prevent bad bacteria from being imparted to the object 6 to be refrigerated.
  • Example 1 Meat was placed in a conventional refrigerator without applying an alternating electric field and without a filter for 3 days. A lot of drip oozes out immediately after placing the meat on the bat. Along with moisture, umami components also flowed out. On the other hand, meat was put in the refrigerator according to the present invention for 3 days. After 3 days, this meat clearly had a good surface color and almost no drip. From this experiment, it was found that freshness retention and aging were properly realized in the refrigerator of the present invention.
  • Example 2 Pork was placed in a conventional refrigerator without applying an alternating electric field and without using a filter for 3 days.
  • pork was put in the refrigerator according to the present invention for 3 days.
  • the appearance did not change much, but the softness and scent differed when eaten. What was put in the conventional refrigerator was a little worried about acidity and smell.
  • FIGS. 6 and 7 Strawberries were stored for 20 days in a state where the door was not opened and closed in a conventional refrigerator without applying an alternating electric field and using no filter.
  • the strawberry was stored in the refrigerator according to the present invention for 20 days with the door not opened or closed.
  • the strawberry put in the refrigerator according to the present invention had no change in color and a strong sweet scent (see FIG. 7). From this, it can be seen that according to the present invention, freshness retention and aging are achieved.
  • Example 4 Australian rib rolls and cochlear sirloin were stored for one week in a conventional refrigerator that applied no alternating electric field and no filters.
  • Australian rib rolls and cochlear sirloin were stored in the refrigerator according to the present invention for one week.
  • the number of viable bacteria, the number of coliforms, the amount of inosinic acid, and the amount of glutamic acid were measured for each meat. The results are shown in the following table.
  • Daiwa Fresh is the trade name of the refrigerator according to the present invention.
  • the amount of glutamic acid in the meat refrigerated in the refrigerator of the present invention was significantly high. This indicates that aging is progressing.
  • the amount of inosinic acid in meat refrigerated in the refrigerator of the present invention is slightly reduced, if glutamic acid is increased, it is considered that there is no problem with aging.
  • Example 5 Purpose of test For the sample “soy milk” (general storage and Daiwa fresh storage), the bacterial test (based on “Food Hygiene Inspection Guidelines”) and sugar content (Brix equivalent value) were measured. 2. Exam overview
  • Bacteria test [General bacteria] 1 ml of a soymilk sample was weighed and suspended in 90 ml of sterilized physiological saline (hereinafter referred to as a sample solution), 1 ml was mixed in a standard agar medium, cultured at 35 ° C. for 48 hours, and the appearance colonies were counted. .
  • Example 6 Lettuce Freshness Retention Test Test contents Freshly harvested lettuce was stored in Daiwa Fresh and a normal refrigerator. We compared the overgrowth of the cells with respect to their lettuce after storage. In this comparison, freshness maintenance and bacteriostatic effect were examined. In this case, a test was performed on a freshly collected sample without using any chemicals.
  • Bacterial test results (1) Test purpose Bacteria test was performed on the sample “Letus” (general storage and Daiwa Fresh storage day 7) (general bacteria count and count of E. coli even number “Food hygiene inspection guidelines”). (2) Outline of the test
  • FIGS. 12 and 13 Strawberries were stored for 10 days under the condition that the door was opened and closed in a normal use state in a conventional refrigerator without applying an alternating electric field and without using a filter.
  • Bacteriostatic filter A No bacteriostatic filter installed
  • Bacteriostatic filter installed B: Bacteriostatic filter installed
  • Example 10 Domestic pork loin freshness maintenance test Test Contents Domestic pork loin slaughtered on July 9, 2012 was stored in a refrigerator at 0 ° C. to 2 ° C. for 1 day. This domestic pork loin was sliced on July 10, 2012. The sliced pork loin was purchased as a specimen on July 12. This purchased specimen was stored in Daiwa Fresh (alternating electric field applied, bacteriostatic filter attached) and refrigerator for one week to examine the cells.
  • Daiwa Fresh alternating electric field applied, bacteriostatic filter attached
  • Test start date July 12, 2012 3.
  • Test set temperature (Daiwa Fresh): 2 ° C 4).
  • Test set temperature (refrigerator): 2 ° C 5.
  • Daiwa Fresh Applied Voltage 2000V 6).
  • Bacteriostatic filter mounted
  • Bacterial cell inspection (1) Test purpose Bacteria test (general bacteria count and E. coli even count "food hygiene inspection guidelines” compliant) was performed on the specimen "pork” (general storage and Daiwa fresh storage 7th day). (2) Outline of the test
  • sample solution sterilized physiological saline
  • sample solution sterilized physiological saline
  • Coliform bacteria 1 ml of the sample solution was poured on a desoxycholate agar medium, cultured at 35 ⁇ 1 ° C. for 24 hours, and typical colonies among the appearing colonies were counted.

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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)
  • Freezing, Cooling And Drying Of Foods (AREA)

Abstract

L'invention porte sur un réfrigérateur, dans lequel il est possible d'augmenter l'effet de maintien de fraîcheur dans un article réfrigéré, tel qu'un article alimentaire ou un ingrédient alimentaire, et de faire mûrir, en même temps qu'il est réfrigéré, l'article réfrigéré, d'une manière simple et fiable. A cet effet, l'invention porte sur un réfrigérateur (1) pour réfrigérer un article réfrigéré (6) disposé dans l'espace de réfrigération (S). Le réfrigérateur (1) a : une paroi de réfrigérateur (2) constituant l'espace de réfrigération (S), et ayant des propriétés d'isolation électrique ; un dispositif de réfrigération (7) pour mettre l'article réfrigéré (6) dans un état de température de glace ; un ventilateur (9) pour former un écoulement d'air (B) dans l'espace de réfrigération (S) ; des dispositifs d'application de champ électrique (5, 14) pour appliquer un champ électrique alternatif à l'article réfrigéré (6) disposé dans l'espace de réfrigération (S) ; et un filtre (15) disposé dans l'écoulement d'air (B) formé par le ventilateur (9). Le filtre (15) a une action consistant à soumettre des bactéries contenues dans l'écoulement d'air formé par le ventilateur (9) à une bactériostase.
PCT/JP2012/007572 2012-09-11 2012-11-26 Réfrigérateur et procédé de réfrigération WO2014041590A1 (fr)

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JP2012199515A JP2014055690A (ja) 2012-09-11 2012-09-11 冷蔵庫及び冷蔵方法
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