JP4637459B2 - Cold storage - Google Patents

Description

【０２２７】
表１から明らかなように、各実施例（本発明）の保冷庫では、いずれも、霜の付着が好適に防止または抑制されていた。
【０２２８】
これに対し、各比較例の保冷庫では、いずれも大きな氷の塊が確認された。また、各比較例の保冷庫では、日数の経過に伴って消費電力量が増加する傾向にあった。
【０２２９】
また、実施例７〜１２については、保冷庫を、さらに１２０日間（合計２４０日間）連続して稼動させ、その後の保冷庫内への霜の付着状態を、前記と同様の基準に従って評価した。その結果、いずれも、霜の付着が全く認められなかった。
【０２３０】
【発明の効果】
以上述べたように、本発明によれば、霜の付着を防止または抑制することができ、消費電力量の増大や収納される保存物の品質の低下を防止することができる。
【０２３１】
また、霜付着防止装置の設置数や配置を適宜設定することにより、前記効果がより向上する。
【図面の簡単な説明】
【図１】本発明の保冷庫の第１実施形態を示す概略図である。
【図２】図１に示す保冷庫が有する熱交換機（冷却手段）および霜付着防止装置の構成を示す概略図（後方から見た図）である。
【図３】各霜付着防止装置からの磁場の発生タイミングを示すタイミングチャートの一例である。
【図４】各霜付着防止装置からの磁場の発生タイミングを示すタイミングチャートの一例である。
【図５】本発明の保冷庫の第２実施形態を示す概略図である。
【図６】図５に示す保冷庫が有する霜付着防止装置の設置例を示す概略図である。
【図７】第３実施形態の保冷庫が有する霜付着防止装置の設置例を示す概略図である。
【図８】第４実施形態の保冷庫が有する霜付着防止装置の設置例を示す概略図である。
【図９】各霜付着防止装置からの磁場の発生タイミングを示すタイミングチャートの一例である。
【図１０】各霜付着防止装置からの磁場の発生タイミングを示すタイミングチャートの一例である。
【図１１】第５実施形態の保冷庫が有する霜付着防止装置の設置例を示す概略図である。
【図１２】第６実施形態の保冷庫が有する霜付着防止装置の設置例を示す概略図である。
【図１３】本発明の保冷庫の第７実施形態を模式的に示す断面図である。
【図１４】本発明の保冷庫の第８実施形態を示す概略図である。
【符号の説明】
１０ 保冷庫
１００ 箱体
１０２ 側壁部
１０３ 隔壁
１０４ 天井部
１０５ 機械室
２００ 保冷室
３００ 保冷室
１０１ 保冷庫本体
４００ 保冷室
２（２Ａ、２Ｂ、２Ｃ、２Ｄ、２Ｅ） 霜付着防止装置
２１ コイル
２２ 非磁性体カバー
２０ 制御装置
７ 載置部
７１ トレイ
８ 熱交換機（冷却手段）
８１ プレート蒸発器、蒸発器
８１１ プレート（基体）
８１２ 流路
８２ 圧縮機
８３ 凝縮器
８４ 冷媒配管
８５ 冷媒配管
９ ファン
１１ 除湿装置
１１０ 除湿器
１１１ 導排出部
１１２ 導入路
１１３ 送出路
１２ 湿度センサ
Ｐ ポンプ[0001]
[Technical field to which the invention belongs]
The present invention In the warehouse It is related.
[0002]
[Prior art]
For the purpose of storing food for a long period of time by preventing the food from being spoiled, the food is stored in a refrigerator such as a refrigerator or a freezer.
[0003]
By the way, when such a cool box is operated continuously for a long period of time, frost adheres to the periphery of the cooling device (evaporator), the inner wall surface of the cool box, the food surface, etc. May become a lump.
[0004]
If ice clumps adhere to the periphery of the evaporator or the inner wall of the cool box, there is a problem that the cooling efficiency of the cool box decreases and power consumption increases, and ice clumps on the food surface. There is a problem that the quality of the food is deteriorated when it adheres.
[0005]
For the purpose of solving such problems, refrigerators equipped with a defrosting heater are widely used (see, for example, Patent Document 1). However, in such a refrigerator, the temperature in the refrigerator rises at the time of defrosting, and the preservability of food in the refrigerator may be impaired.
[0006]
[Patent Document 1]
JP 2002-90036 A
[0007]
[Problems to be solved by the invention]
The object of the present invention is to maintain coldness capable of preventing or suppressing frost adhesion. Storehouse It is to provide.
[0008]
[Means for Solving the Problems]
The purpose of this is as follows (1) to (21) This is achieved by the present invention.
[0010]
(1) A cool box that stores stored items in a storage space and can be stored in a refrigerated state or a frozen state,
A cooling means comprising an evaporator and keeping the storage space at a low temperature;
A plurality of frost adhesion preventing devices having a function of preventing or suppressing frost from adhering to the inside of the cold storage by applying a magnetic field;
Three or more frost adhesion preventing devices are provided,
The generation timing of the magnetic field is controlled so that the generation timing of the magnetic field from at least two of the frost adhesion prevention devices is synchronized and different from the generation timing of the magnetic field from one or more other frost adhesion prevention devices. A combination of two or more frost adhesion preventing devices synchronized in timing changes with time.
(2) The above having a low-temperature gas supply means for supplying a low-temperature gas having less water vapor content than the outside air (1) Cold storage as described in.
[0011]
(3) The low-temperature gas supply means includes a dehumidifying device for dehumidifying the low-temperature gas. (2) Cold storage as described in.
[0012]
(4) The low-temperature gas supply means is for maintaining the pressure value of the storage space at or above the pressure value outside the cool box. (2) or (3) Cold storage as described in.
[0013]
(5) The operation and stop of the low temperature gas supply means are repeated every predetermined time. Any of (2) to (4) above Cold storage as described in.
[0014]
(6) Humidity detection means for detecting the humidity in the cool box is provided, and the operation of the low-temperature gas supply means is controlled according to the detection result. Any of (2) to (5) above Cold storage as described in.
[0015]
(7) The frost adhesion preventing device is configured to change its magnetic field strength over time. Any of (1) to (6) above Cold storage as described in.
[0020]
(8) At least two frost adhesion prevention devices are arranged to face each other Any of (1) to (7) above Cold storage as described in.
[0021]
(9) The plurality of frost adhesion preventing devices are arranged such that the surfaces facing the stored items are substantially orthogonal to each other. One of (1) to (8) Cold storage as described in.
[0022]
(10) Each of the frost adhesion preventing devices has a flat plate shape, and the adjacent frost adhesion preventing devices are arranged so as to be substantially perpendicular to each other. Any of (1) to (9) above Cold storage as described in.
[0023]
(11) At least one of the plurality of frost adhesion preventing devices is installed in the storage space. Any of (1) to (10) above Cold storage as described in.
[0024]
(12) The frost adhesion preventing device is installed in the vicinity of the evaporator. Any of (1) to (11) above Cold storage as described in.
[0025]
(13) The frost adhesion preventing device is disposed closer to the storage space than the evaporator. Above (12) Cold storage as described in.
[0026]
(14) The frost adhesion preventing device and the evaporator are arranged to face each other. Any of (1) to (13) above Cold storage as described in.
[0027]
(15) A fan for circulating the cooled gas in the storage space; Any of (1) to (14) above Cold storage as described in.
[0028]
(16) The blowing speed from the fan is 0.5 to 10 m / s. Above (15) Cold storage as described in.
[0029]
(17) It has a mounting part for mounting the stored matter Any of (1) to (16) above Cold storage as described in.
[0030]
(18) The said frost adhesion prevention apparatus is arrange | positioned in the said mounting part or its vicinity. Above (17) Cold storage as described in.
[0031]
(19) In the storage space, the generation of the magnetic field from the frost adhesion preventing device is controlled so that the direction of the magnetic lines of force rotates. Any of (1) to (18) above Cold storage as described in.
[0032]
(20) The frost adhesion preventing device generates an alternating magnetic field. Any of (1) to (19) above Cold storage as described in.
[0033]
(21) The frost adhesion preventing device has low temperature resistance. (1) to (20) above The cool box according to any one of the above.
[0039]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail based on preferred embodiments.
FIG. 1 is a schematic view showing a first embodiment when the frost adhesion preventing apparatus of the present invention is applied to a cool box, and FIG. 2 is a view showing a heat exchanger (cooling means) and a book included in the cool box shown in FIG. FIG. 3 is a schematic diagram showing the configuration of the frost adhesion preventing apparatus of the invention (viewed from the rear), and FIGS. 3 and 4 are examples of timing charts showing the generation timing of the magnetic field from each frost adhesion preventing apparatus. . In the following description, the front side of the paper in FIG. 1 is referred to as “front”, the back side of the paper is referred to as “rear”, and the back side of the paper is referred to as “front” and the front side of the paper in FIG. FIGS. 1 and 2 (the same applies to FIGS. 5 to 8 and FIGS. 11 to 13 described later) are partly exaggerated and do not reflect the actual size.
[0040]
A cold box (house-use refrigerator-freezer) 10 shown in FIG. 1 can store a stored product and can store (store) it in a refrigerated state or a frozen state. And a door (not shown) provided to be openable and closable.
[0041]
The box body 100 is provided with a partition wall 103 in the middle in the vertical direction. As a result, an upper cool room (storage space) 200 and a lower cool room (inside the cool box 10 (box body 100)) Storage space) 300 is defined.
[0042]
The cool box 10 has a cooling means. In the present embodiment, as the cooling means, each of the cold storage chambers 200 and 300 is independently maintained at a cold temperature (low temperature) by performing heat exchange between the inside and the outside of the cool box 10. And a heat exchanger 8.
[0043]
The heat exchanger 8 of the present embodiment includes a plurality of plate evaporators (evaporators) 81, a compressor 82, and a condenser 83, as shown in FIG. Further, the compressor 82, the condenser 83, the control device 20, which will be described later, and the like are installed in a machine room 105 at the lower rear of the box body 100.
[0044]
As shown in FIG. 1, the plate evaporator 81 has a pair of upper and lower sides (four in total) corresponding to each of the cold insulation chambers 200 and 300, and a ceiling portion (upper One side wall 104) is provided.
[0045]
In the illustrated configuration, the plate evaporator 81 is formed by meandering a flow path 812 in a plate (base body) 811. The plate evaporator 81 and the compressor 82 and the plate evaporator 81 and the condenser 83 are connected by refrigerant pipes 84 and 85, respectively. Thereby, the flow paths (lumen portions) in the refrigerant pipes 84 and 85 and the flow paths 812 of the plate evaporators 81 communicate with each other. A refrigerant (working fluid) is filled in the flow path (inside the heat exchanger 8). The plate evaporator 81 may have a configuration in which a refrigerant pipe is fixed (fixed) to the plate 811.
[0046]
In the heat exchanger 8, the refrigerant filled in the heat exchanger 8 takes the heat around it in the plate evaporator 81, is compressed in the compressor 82, and is discharged to the outside air in the condenser 83. The inside of 200, 300 is kept cold (low temperature).
[0047]
In the present embodiment, the plate evaporator 81 is arranged as described above, so that the cold insulation chamber 200 can be cooled from three directions (upward and lateral directions in FIG. 1). Cooling is possible from two directions (left and right direction in FIG. 1). Thereby, each of the cold storage chambers 200 and 300 is normally set to 10 ° C. or lower in the case of refrigeration and is set to −18 ° C. or lower in the case of freezing.
[0048]
In such a cool box 10, the water vapor (water molecules) contained in the atmosphere in the cool box 10 gradually moves around the plate evaporator 81, the inner wall surface of the cool box 10, and the cool room by long-term operation. Freezes on the surface of the stored material stored in 200, 300 and adheres as frost. Furthermore, if the operation of the cool box 10 is continued in this state, a large amount of frost adheres and eventually becomes a large ice lump.
[0049]
If such ice blocks adhere to the periphery of the plate evaporator 81 or the inner wall surface of the cool box 10, there arises a problem that the cooling efficiency of the cool box 10 is lowered and the power consumption is increased. If a lump of ice adheres to the surface of a product, if the stored product is food (especially raw), the quality of the product deteriorates.
[0050]
In order to solve this problem, the present inventor has made extensive studies and found that there is a correlation between the amount of frost attached and the molecular size of water molecules contained in the atmosphere. In other words, water molecules usually form a cluster (water cluster) and have a relatively large molecular size. By subdividing this water cluster (lowering the molecular weight), the generation of frost itself In addition, even when frost is generated, small ice crystals are formed, so that the storage around the plate evaporator 81, the inner wall surface of the cool box 10 and the cool chambers 200 and 300 is stored. It has been found that it is difficult to adhere to the surface of an object.
[0051]
Here, the “water cluster” means a cluster mainly composed of water molecules (Cluster), which is substantially composed only of water molecules, mainly composed of water molecules, and other than water. It is a concept including the thing containing the component (molecules other than a water molecule, ion, etc.).
[0052]
Furthermore, as a result of repeated studies, the present inventor has found that it is effective to use a magnetic field for subdividing water clusters, and has completed the present invention. That is, the cool box 10 according to the present invention includes the frost adhesion preventing device 2 having a function of preventing or suppressing frost adhesion by applying a magnetic field.
[0053]
Hereinafter, the frost adhesion preventing apparatus 2 of the present invention will be described in detail. In addition, since the structure of the part corresponding to each cool room is substantially the same, below, the structure of the part corresponding to the cool room 200 is demonstrated as a representative.
[0054]
As shown in FIG. 2, in the cool box 10 of this embodiment, a plurality of frost adhesion preventing devices 2 (first frost adhesion preventing device 2A, second frost adhesion preventing device 2B, third frost adhesion preventing device). 2C), each of which is electrically connected to a controller 20 that controls its operation.
[0055]
The frost adhesion preventing device 2 has a flat plate shape as a whole, and includes a coil 21 and a nonmagnetic cover 22. The frost adhesion preventing apparatus 2 prevents or suppresses frost adhesion by energizing the coil 21 to generate a magnetic field.
[0056]
Further, as shown in FIG. 1, the frost adhesion preventing device 2 can be installed inside the wall portion of the box body 100 together with the plate evaporator 81, as shown in FIG. 10 can be miniaturized.
[0057]
And in this embodiment, the frost adhesion prevention apparatus 2 is comprised so that the intensity | strength of the magnetic field to generate | occur | produce can be changed by changing the direction and quantity of the electric current which flow through the coil 21, for example. As a result, the frost adhesion preventing apparatus 2 can change the applied magnetic field intensity over time.
[0058]
In this way, the frost adhesion preventing apparatus 2 applies mainly a water molecule-water molecule in a water molecule (water cluster) contained in the atmosphere in the cool box 10 by applying a magnetic field whose strength changes with time. Hydrogen bonds formed between them are efficiently cut, and water clusters are subdivided. In addition, when the magnetic field strength (magnetic force applied to the cold insulation material) in the cold insulation material changes with time, hydrogen bonds re-form between water molecules, or hydrogen ions (H ⁺ ) And hydroxide ions (OH ⁻ ) Can be effectively prevented from binding. As a result, it is possible to efficiently maintain a state where the water clusters are fragmented.
[0059]
As a result, the generation of frost itself is prevented or suppressed, or even when frost is generated, the ice crystals are also refined (small crystal grain size). It is possible to prevent or suppress frost from adhering to the evaporator 81).
[0060]
The current flowing through the coil 21 may be direct current or alternating current. In particular, when the current flowing through the coil 21 is alternating current, the strength of the magnetic field generated by the frost adhesion preventing device 2 can be changed relatively easily.
[0061]
In the illustrated configuration, the coil 21 is a circular coil, but the shape of the coil 21 is not particularly limited. The coil 21 may have any shape, such as a base ball coil or a square coil. Moreover, in each frost adhesion prevention apparatus 2, the shape, magnitude | size, etc. of the coil 21 may be the same and may differ, for example.
[0062]
The nonmagnetic cover 22 has a function of protecting and fixing the coil 21. Examples of the constituent material of the non-magnetic cover 22 include various resin materials such as acrylic resin and silicone resin.
[0063]
Although the magnetic field which the frost adhesion prevention apparatus 2 generate | occur | produces is not specifically limited, For example, it is preferable that it is an alternating magnetic field. As a result, the strength of the magnetic field to be applied can be easily changed, and as a result, the water cluster (hereinafter simply referred to as “water cluster”) contained in the atmosphere in the cool box 10 is more efficiently obtained. It becomes possible to subdivide.
[0064]
Although the frequency in an alternating magnetic field is not specifically limited, For example, it is preferable that it is 20-25000 Hz, and it is more preferable that it is 40-1200 Hz. When the frequency in the alternating magnetic field is a value within the above range, the water cluster can be subdivided more effectively.
[0065]
Although the maximum intensity | strength (absolute value) of the magnetic field which the frost adhesion prevention apparatus 2 generate | occur | produces is not specifically limited, For example, it is preferable that it is 100-12000Gs, and it is more preferable that it is 300-7000Gs. If the strength of the magnetic field generated by the frost adhesion preventing device 2 is less than the lower limit value, it is difficult to sufficiently increase the amount of change in the strength of the applied magnetic field, and depending on the cooling temperature by the heat exchanger 8 or the like, It may be difficult to make the cluster sufficiently small. On the other hand, if the strength of the magnetic field generated by the frost adhesion preventing device 2 exceeds the upper limit, the size of the device is increased. In addition, when the strength of the magnetic field generated by the frost adhesion preventing device 2 exceeds the upper limit value, the voltage required for generating the magnetic field increases, and accordingly, the amount of heat generated from the coil increases and the cooling efficiency of the cool box decreases. Show a tendency to
[0066]
Further, the magnetic field generated by the frost adhesion preventing device 2 is not limited to the alternating magnetic field as described above. For example, the magnetic field generated by the frost adhesion preventing device 2 may be intermittent. In this case, preferred ranges such as the frequency and maximum intensity of the generated magnetic field are the same as described above.
[0067]
Moreover, it is preferable that the frost adhesion preventing apparatus 2 has a low temperature resistance capable of withstanding the cooling temperature by the heat exchanger 8. Thereby, since durability of the frost adhesion preventing apparatus 2 is improved, the cool box 10 exhibits a stable effect over a long period of time. Moreover, since it is not necessary to replace the frost adhesion preventing apparatus 2 (or since the number of replacements of the frost adhesion preventing apparatus 2 can be reduced), the maintenance of the cool box 10 is facilitated.
[0068]
A plurality of the frost adhesion preventing devices 2 having such a configuration (the first frost adhesion preventing device 2A, the second frost adhesion preventing device 2B, and the third frost adhesion preventing device 2C) are installed around the cold insulation chamber 200. ing.
[0069]
The first frost adhesion preventing device 2A to the third frost adhesion preventing device 2C are respectively installed in the vicinity of the plate evaporator 81 provided in the heat exchanger 8 and facing the plate evaporator 81. . As a result, the water clusters are efficiently subdivided particularly around the plate evaporator 81, and as a result, frost can be more reliably prevented or suppressed from adhering around the plate evaporator 81.
[0070]
Further, in the present embodiment, the first frost adhesion preventing device 2 </ b> A to the third frost adhesion preventing device 2 </ b> C are respectively disposed on the cold insulation room (storage space) 200 side from the plate evaporator 81. Accordingly, the first frost adhesion preventing device 2A to the third frost adhesion preventing device 2C can efficiently apply a magnetic field to the cold insulation chamber 200, and as a result, the water clusters present in the cold insulation chamber 200 also. It is possible to subdivide more reliably. Thereby, it can prevent or suppress that frost adheres not only to the circumference | surroundings of each plate evaporator 81 but the internal peripheral surface of the cool box 10, the surface of a preserved material, etc.
[0071]
In addition, since the first frost adhesion preventing device 2 </ b> A and the third frost adhesion preventing device 2 </ b> C are arranged so as to face each other, a magnetic field can be efficiently applied by the cold insulation chamber 200. The water cluster can be subdivided more efficiently.
[0072]
Further, in the present embodiment, the first frost adhesion preventing device 2A, the second frost adhesion preventing device 2B, the third frost adhesion preventing device 2C, and the second frost adhesion preventing device 2B (adjacent frost adhesion preventing device 2). Are installed so as to be almost vertical. In other words, each frost adhesion preventing device 2 is arranged so that the surfaces facing the stored items are substantially orthogonal to each other. As a result, when the generation pattern of the magnetic field is controlled by the control device 20 to be described later, the direction of the magnetic field applied to the cold insulation chamber 200 (direction of the magnetic field lines in the cold insulation chamber 200), the magnitude, the strength, etc. are easily changed to a desired one. As a result, it becomes possible to subdivide the water clusters in the cold insulation chamber 200 more efficiently.
[0073]
In the illustrated configuration, the first frost adhesion preventing device 2 </ b> A to the third frost adhesion preventing device 2 </ b> C are arranged closer to the cold insulation chamber 200 than the plate evaporator 81. You may arrange | position at the outer wall surface side of the store | warehouse | chamber 10, and may be provided integrally with the plate evaporator 81. FIG.
[0074]
The control device 20 individually controls the strength of the magnetic field generated by each frost adhesion prevention device 2 (the first frost adhesion prevention device 2A, the second frost adhesion prevention device 2B, and the third frost adhesion prevention device 2C). It has the function to do. Thereby, the generation timing (magnetic field generation pattern) from at least one of the frost adhesion prevention devices 2 can be controlled to be different from the generation timing of the magnetic field from the other frost adhesion prevention devices 2. .
[0075]
Thus, the water clusters in the cold insulation chamber 200 can be subdivided more efficiently by making the generation timings of the magnetic fields different among the plurality of frost adhesion preventing devices 2. In other words, hydrogen bonds formed by water molecules contained in the atmosphere in the cool box 10 can be efficiently cut. As a result, it is possible to more reliably prevent or suppress frost adhesion to the inner wall surface of the cool box 10 and the surface of the stored item.
[0076]
For example, the control device 20 includes the direction of the current flowing through the coil 21 of each frost prevention device 2 (the first frost protection device 2A, the second frost protection device 2B, and the third frost protection device 2C), It may have a variable function for changing the frequency, the amount of current, and the like. Thereby, the intensity | strength of the magnetic field which each frost adhesion preventing apparatus 2 generate | occur | produces can be controlled more correctly, and the magnetic field (sum total of the magnetic field which each frost adhesion preventing apparatus 2 generate | occur | produces) applied to the cold storage chamber 200 is easy. Furthermore, it can have a desired shape, size, and strength. As a result, the water cluster in the cold room 200 can be subdivided more efficiently.
[0077]
The generation | occurrence | production timing (generation pattern) of the magnetic field from each frost adhesion prevention apparatus 2 can be controlled as shown in FIG. 3, for example.
[0078]
That is, first, an alternating voltage is applied to the coils 21 of the first frost adhesion preventing device 2 </ b> A and the second frost adhesion preventing device 2 </ b> B, and a magnetic field is generated from the two frost adhesion preventing devices 2. At this time, no voltage is applied to the coil 21 of the third frost adhesion preventing apparatus 2C. The generation timing of the magnetic field from the first frost adhesion preventing apparatus 2A and the generation timing of the magnetic field from the second frost adhesion prevention apparatus 2B are synchronized. With the change of the magnetic field generated by the first frost adhesion preventing device 2A and the second frost adhesion preventing device 2B, the magnetic field applied to the cold insulation chamber 200 is changed, and the water clusters are subdivided.
[0079]
After energizing the coils 21 of the first frost adhesion preventing device 2A and the second frost adhesion preventing device 2B for a predetermined time, the energization to the coil 21 of the first frost adhesion preventing device 2A is stopped, and the third frost Energization of the coil 21 of the adhesion preventing device 2C is started. That is, the application of the AC voltage is switched from the coil 21 of the first frost adhesion preventing apparatus 2A to the coil 21 of the third frost adhesion preventing apparatus 2C. Thereby, the direction of the magnetic field applied to the cold insulation chamber 200 is switched, and the direction of the lines of magnetic force in the cold insulation chamber 200 is changed. Thereby, it becomes possible to change the magnetic field applied to the cold room 200 evenly, and the subdivision of the water cluster proceeds efficiently.
[0080]
Thereafter, in the same manner as described above, the coil 21 of the second frost adhesion preventing device 2B and the third frost adhesion preventing device 2C is energized for a predetermined time. Thereby, the fragmentation of the water cluster further proceeds.
[0081]
Thereafter, the energization to the coil 21 of the second frost adhesion preventing apparatus 2B is stopped, and the energization to the coil 21 of the first frost adhesion preventing apparatus 2A is started. That is, the application of the alternating voltage is switched from the coil 21 of the second frost adhesion preventing apparatus 2B to the coil 21 of the first frost adhesion preventing apparatus 2A. Thereby, the direction of the magnetic field applied to the cold insulation chamber 200 is switched, and the direction of the lines of magnetic force in the cold insulation chamber 200 is changed. Thereby, the subdivision of the water cluster proceeds efficiently.
[0082]
Thereafter, similarly to the above, the coil of the frost adhesion preventing apparatus 2 to which an AC voltage is applied is repeatedly switched. As a result, the direction of the magnetic lines of force and the magnetic field strength in the cold insulation chamber 200 change over time. In this way, by changing the direction of the magnetic lines of force and the magnetic field strength in the cold insulation chamber 200 over time, the water clusters can be evenly refined in each part of the cold insulation chamber 200.
[0083]
In addition, as described above, in the present embodiment, the generation timing of the magnetic fields from the two frost adhesion preventing devices 2 is synchronized, and the combination of the synchronized frost adhesion preventing devices 2 is changed over time, thereby keeping the cold. The generation of the magnetic field is controlled so that the magnetic lines of force rotate in the chamber 200. Thereby, the cluster of water can be refined more evenly in each part of the cold insulation chamber 200.
[0084]
In the timing chart shown in FIG. 3, the phase of the generated magnetic field is always the same in the two synchronized frost adhesion preventing devices 2, but the phase is not necessarily the same. For example, in the two synchronized frost adhesion preventing devices 2, the phase of the generated magnetic field may be shifted by a half wavelength.
[0085]
Further, the maximum strength of the magnetic field generated by each frost adhesion preventing device 2 may be substantially equal or different in each frost adhesion preventing device 2.
[0086]
Moreover, you may control the generation | occurrence | production timing (generation pattern) of the magnetic field from each frost adhesion prevention apparatus 2 as shown in FIG. 4, for example.
[0087]
That is, while generating an alternating magnetic field having a predetermined frequency continuously from the first frost adhesion preventing device 2A and the third frost adhesion preventing device 2C, the second frost adhesion preventing device 2B discontinuously (intermittently). An alternating magnetic field of a predetermined frequency may be generated.
[0088]
In this case, the frequency of the alternating magnetic field generated from each frost adhesion preventing device 2 may be the same or different.
[0089]
The frost adhesion preventing device 2 as described above may or may not always operate during the operation of the cool box 10. For example, the frost adhesion prevention device 2 may be controlled so as to operate at an initial stage during operation of the cool box 10 and then stop, or to operate and stop every predetermined time. It may be repeated. In this way, by controlling the operation of the frost adhesion preventing apparatus 2, it is possible to save energy while sufficiently exhibiting the effects of the present invention as described above.
[0090]
The cool box 10 further includes energy applying means for irradiating the cool room (storage space) 200 with at least one of microwaves, α rays, far infrared rays, ultrasonic waves, ultraviolet rays, and negative ions. May be. If the cool box 10 has such an energy application means, it becomes possible to subdivide the water cluster more efficiently.
[0091]
In the case where the energy applying means irradiates microwaves, the microwaves are preferably irradiated intermittently (non-continuously). Specifically, it is preferable to repeatedly perform microwave irradiation for 0.1 to 10 seconds and stop microwave irradiation for 0.1 to 20 seconds. Thereby, it becomes possible to subdivide the water cluster more efficiently.
[0092]
When the energy applying means irradiates far infrared rays, the constituent material of the energy applying means is, for example, alumina (Al ₂ O ₃ ), Magnesia (MgO), zirconia (ZrO) ₂ ), Titania (TiO ₂ ), Silicon dioxide (SiO2) ₂ ), Chromium oxide (Cr ₂ O ₃ ), Ferrite (FeO · Fe ₃ O ₄ ), Spinel (MgO · Al ₂ O ₃ ), Ceria (CeO ₃ ), Beryllia (BeO), Na ₂ O ₃ , SnO ₂ , SiC, ZrC, TaC, ZrB ₂ Such as ceramics, ore such as tourmaline can be used. Among these, it is preferable to use ceramics as a constituent material of the energy applying means in that far infrared rays can be irradiated with particularly excellent efficiency.
[0093]
Further, when the energy applying unit irradiates ultrasonic waves, for example, an ultrasonic vibrator or the like can be used as the energy applying unit.
[0094]
In addition, when the energy imparting means irradiates negative ions, the constituent materials of the energy imparting means include, for example, tourmaline, davidite, blannelite, senurite, nymphite, lincaurite, carnotite, chamunite , Ores such as metachamunite, francesville stone, tall stone, coffin stone, samarsky stone, thorium stone, tro rubber stone, mozna stone, BaTiO ₃ , PbTiO ₃ , PbZrO ₃ , Pb (Zr, Ti) O ₃ , KNbO ₃ , KTaO ₃ , K (Ta, Nb) O ₃ LiNbO ₃ And Rochelle salt, glycine sulfate, potassium phosphate, calcium strontium propionate, and the like.
[0095]
In addition, each such energy provision means may be provided integrally with the frost adhesion preventing apparatus 2, or may be provided individually (independently).
[0096]
Next, 2nd Embodiment of the cool box of this invention is described. Hereinafter, the cool box of the second embodiment will be described with a focus on the differences from the first embodiment described above, and description of similar matters will be omitted.
[0097]
FIG. 5 is a schematic view showing a second embodiment of the cool box according to the present invention, and FIG. 6 is a schematic view showing an installation example of the frost adhesion preventing device of the cool box shown in FIG.
[0098]
The cool box 10 of the second embodiment is a commercial refrigerator-freezer, and the overall configuration thereof is different, but the configuration of each part is substantially the same as that of the first embodiment.
[0099]
That is, as shown in FIG. 5, the cool box 10 of the second embodiment includes a cool box main body 101, a plurality of frost adhesion prevention devices 2, a placement unit 7 for placing stored items, and a heat exchanger (cooling). Means) 8 and a fan 9 for circulating cold air.
[0100]
The cool box main body 101 has a cold storage room (storage space) 400 for storing stored items therein.
[0101]
The placement unit 7 is disposed inside the cool box body 101 (cold room 400).
In the illustrated configuration, the placement unit 7 is a rack having a plurality of trays 71. When the mounting unit 7 is such a rack, for example, the stored item can be arranged so that the contact area between the cold air circulating in the cold room 400 and the stored item becomes large. For this reason, for example, even when the total amount of the stored items is relatively large (even when there are a plurality of stored items), the stored state (refrigerated state or frozen state) of the stored items is suitable. be able to.
[0102]
The rack may be composed of any material, but is preferably composed mainly of a nonmagnetic metal such as aluminum or copper, or a nonmagnetic material such as various plastics. More preferably, it is configured.
[0103]
The heat exchanger 8 of the present embodiment includes an evaporator 81, a compressor 82, and a condenser 83, and refrigerant pipes are provided between the evaporator 81 and the compressor 82 and between the evaporator 81 and the condenser 83, respectively. 84 and 85 are connected. The evaporator 81 is fixed to the ceiling portion in the cool box main body 101.
[0104]
The fan 9 has a function of circulating cold air in the cold room 400. Thereby, the variation in temperature in each part of the cold room 400 is reduced, and the stored material can be cooled at a more stable cooling rate and stored in a refrigerated state or a frozen state.
[0105]
Although the ventilation speed from the fan 9 is not specifically limited, For example, it is preferable that it is 0.5-10 m / s, and it is more preferable that it is 2-8 m / s.
[0106]
If the blowing speed from the fan 9 is less than the lower limit value, there is a possibility that the temperature variation in each part of the cold insulation chamber 400 cannot be sufficiently reduced depending on the volume of the cold insulation chamber 400 or the like. On the other hand, when the air blowing speed from the fan 9 exceeds the upper limit value, depending on the temperature of the cold room 400, the water cluster may be frozen in a state where it is not sufficiently subdivided, that is, each frost adhesion preventing device 2 May not be fully utilized.
[0107]
In the present embodiment, the first frost adhesion preventing device 2 </ b> A to the fourth frost adhesion preventing device 2 </ b> D are all provided in the cold storage chamber (storage space) 400, and among these, the first frost adhesion prevention device 2 </ b> D is located near the evaporator 81. The anti-adhesion device 2A is arranged, and the second frost anti-adhesion device 2B to the fourth frost anti-adhesion device 2D are arranged in other portions so that a magnetic field can be applied toward the cold insulation chamber 400. .
[0108]
By providing the first frost adhesion preventing device 2 </ b> A in the vicinity of the evaporator 81, the water cluster around the evaporator 81 is efficiently subdivided, and frost is prevented from adhering around the evaporator 81. Or it can be suppressed.
[0109]
In addition, by installing the second frost adhesion preventing device 2B to the fourth frost adhesion preventing device 2D so that a magnetic field can be applied toward the cold insulation chamber 400, not only the vicinity of the evaporator 81 but also the cold insulation chamber 400. The water is subdivided efficiently. For this reason, it is possible to efficiently prevent or suppress frost from adhering not only to the periphery of the evaporator 81 but also to the inner wall surface of the cool box 10, the surface of the stored item, and the like.
[0110]
Furthermore, in this embodiment, the 3rd frost adhesion prevention apparatus 2C is provided integrally with the mounting part 7 (especially tray 71). Thereby, the cluster of water in the periphery of the preserved material can be subdivided more effectively, and as a result, adhesion of frost to the surface of the preserved material can be more reliably prevented or suppressed. Moreover, since the number of the frost adhesion prevention apparatuses 2 installed as another member by this can be reduced, it is advantageous to the enlargement of capacity | capacitance of the cool box 10 and space saving.
[0111]
Note that the third frost adhesion preventing device 2 </ b> C is not provided integrally with the placement unit 7, but the same effect as described above can be obtained by providing the third frost adhesion prevention device 2 </ b> C in the vicinity of the placement unit 7.
[0112]
The generation timing (generation pattern) of the magnetic field from each frost adhesion preventing device 2 can be controlled, for example, in the same manner as in FIGS. 3 and 4 or in any other pattern.
[0113]
Next, 3rd Embodiment of the cool box of this invention is described. Hereinafter, the cool box of the third embodiment will be described focusing on the differences from the first and second embodiments described above, and the description of the same matters will be omitted.
[0114]
FIG. 7 is a schematic diagram illustrating an installation example of a frost adhesion preventing device included in the cold storage according to the third embodiment.
[0115]
The cool box 10 of the third embodiment is the same as the second embodiment except that the arrangement of the frost adhesion preventing device 2 is different.
[0116]
That is, in 3rd Embodiment, all of the 2nd frost adhesion prevention apparatus 2B arrange | positioned so that a magnetic field can be applied toward the cold storage chamber 400-4th frost adhesion prevention apparatus 2D are as shown in FIG. Are installed so as to be substantially perpendicular to each other. In other words, the surfaces of the second frost adhesion preventing device 2B, the third frost adhesion preventing device 2C, and the fourth frost adhesion preventing device 2D that face the stored items are arranged so as to be substantially orthogonal to each other.
[0117]
By arranging a plurality of frost adhesion preventing devices 2 in this way, the shape of the magnetic field applied to the cold insulation chamber 400 and the direction of the lines of magnetic force can be efficiently changed three-dimensionally. Thereby, the subdivision of the water cluster in the cold room 400 can be progressed equally and efficiently.
[0118]
The generation timing (generation pattern) of the magnetic field from each frost adhesion preventing device 2 can be controlled, for example, in the same manner as in FIGS. 3 and 4 or any other pattern.
[0119]
Next, 4th Embodiment of the cool box of this invention is described. Hereinafter, the cool box of the fourth embodiment will be described with a focus on the differences from the first to third embodiments described above, and the description of the same matters will be omitted.
[0120]
FIG. 8 is a schematic diagram illustrating an installation example of a frost adhesion preventing apparatus included in the cold storage according to the fourth embodiment. FIGS. 9 and 10 are examples of timing charts showing the generation timing of the magnetic field from each frost adhesion preventing device 2.
[0121]
The cool box 10 of the fourth embodiment is the same as the second and third embodiments except that the number and arrangement of the frost adhesion preventing devices 2 are different.
[0122]
That is, in 4th Embodiment, as shown in FIG. 8, the 2nd frost adhesion prevention apparatus 2B-the 5th frost adhesion prevention apparatus 2E are installed so that a magnetic field can be applied toward the cold storage chamber 400. As shown in FIG. .
[0123]
In addition, the second frost adhesion preventing device 2B and the fourth frost adhesion preventing device 2D face each other, and similarly, the third frost adhesion preventing device 2C and the fifth frost adhesion preventing device 2E are provided. Face to face. That is, adjacent frost adhesion preventing devices 2 are installed so as to be substantially vertical. In this case, the fifth frost adhesion preventing device 2E is provided inside or on the inner surface side of the door of the cool box 10 shown on the left side in FIG.
[0124]
Thus, by arranging the plurality of frost adhesion preventing devices 2 so as to surround the four sides of the cold insulation chamber 400, it becomes possible to subdivide the water clusters more efficiently in the cold insulation chamber 400.
[0125]
The generation timing (generation pattern) of the magnetic field from each frost adhesion preventing device 2 can be controlled, for example, as shown in FIG.
[0126]
That is, first, an AC voltage is applied to the coils 21 of the second frost adhesion preventing device 2B and the third frost adhesion preventing device 2C, and a magnetic field is generated from these two frost adhesion preventing devices 2. At this time, no voltage is applied to the coils 21 of the fourth frost adhesion preventing apparatus 2D and the fifth frost adhesion preventing apparatus 2E. In addition, the generation timing of the magnetic field from the second frost adhesion preventing apparatus 2B is synchronized with the generation timing of the magnetic field from the third frost adhesion prevention apparatus 2C. As the magnetic fields generated by the second frost adhesion preventing device 2B and the third frost adhesion preventing device 2C change, the magnetic field in the cold insulation chamber 400 changes, and the water clusters are subdivided in the cold insulation chamber 400.
[0127]
After energizing the coils 21 of the second frost adhesion preventing device 2B and the third frost adhesion preventing device 2C for a predetermined time, the energization to the coil 21 of the second frost adhesion preventing device 2B is stopped, and the fourth frost Energization of the coil 21 of the adhesion preventing device 2D is started. That is, the application of the alternating voltage is switched from the coil 21 of the second frost adhesion preventing apparatus 2B to the coil 21 of the fourth frost adhesion preventing apparatus 2D. Thereby, the direction of the magnetic field applied to the cold insulation chamber 400 is switched, and the direction of the lines of magnetic force changes. Thereby, in the cool room 400, the subdivision of the water cluster proceeds efficiently.
[0128]
Thereafter, in the same manner as described above, the coil 21 of the third frost adhesion preventing device 2C and the fourth frost adhesion preventing device 2D is energized for a predetermined time. As a result, the water clusters are further subdivided in the cold room 400.
[0129]
Thereafter, energization to the coil 21 of the third frost adhesion preventing apparatus 2C is stopped, and energization to the coil 21 of the fifth frost adhesion preventing apparatus 2E is started. That is, the application of the alternating voltage is switched from the coil 21 of the third frost adhesion preventing apparatus 2C to the coil 21 of the fifth frost adhesion preventing apparatus 2E. Thereby, the direction of the magnetic field applied to the cold insulation chamber 400 is switched, and the direction of the lines of magnetic force changes. Thereby, the subdivision of the water cluster proceeds efficiently.
[0130]
Thereafter, in the same manner as described above, the coil 21 of the fourth frost adhesion preventing device 2D and the fifth frost adhesion preventing device 2E is energized for a predetermined time. Thereby, the fragmentation of the water cluster further proceeds.
[0131]
Then, the energization to the coil 21 of the 4th frost adhesion prevention apparatus 2D is stopped, and the energization to the coil 21 of the 2nd frost adhesion prevention apparatus 2B is started. That is, the application of the AC voltage is switched from the coil 21 of the fourth frost adhesion preventing apparatus 2D to the coil 21 of the second frost adhesion preventing apparatus 2B. Thereby, the direction of the magnetic field applied to the cold insulation chamber 400 is switched, and the direction of the lines of magnetic force changes. Thereby, in the cool room 400, the subdivision of the water cluster proceeds efficiently.
[0132]
Thereafter, in the same manner as described above, the coil 21 of the fifth frost adhesion preventing device 2E and the second frost adhesion preventing device 2B is energized for a predetermined time. Thereby, the fragmentation of the water cluster further proceeds.
[0133]
Thereafter, energization to the coil 21 of the fifth frost adhesion preventing apparatus 2E is stopped, and energization to the coil 21 of the third frost adhesion preventing apparatus 2C is started. That is, the application of the alternating voltage is switched from the coil 21 of the fifth frost adhesion preventing apparatus 2E to the coil 21 of the third frost adhesion preventing apparatus 2C. Thereby, the direction of the magnetic field applied to the cold insulation chamber 400 is switched, and the direction of the lines of magnetic force changes. Thereby, in the cool room 400, the subdivision of the water cluster proceeds efficiently.
[0134]
Thereafter, similarly to the above, the coil of the frost adhesion preventing apparatus 2 to which an AC voltage is applied is repeatedly switched. As a result, the direction of the magnetic lines of force and the magnetic field strength in the cold insulation chamber 400 change over time. As described above, by changing the direction of the magnetic lines of force and the magnetic field strength in the cool chamber 400 over time, the water clusters can be uniformly refined in each part of the cool chamber 400.
[0135]
Thus, in this embodiment, the generation | occurrence | production timing of the magnetic field from the two frost adhesion prevention apparatuses 2 is synchronized, and the combination of the frost adhesion prevention apparatuses 2 to synchronize is changed with time, A cold storage room (storage) In space 400, the generation of the magnetic field is controlled so that the magnetic lines of force rotate. Thereby, the water cluster can be refined more evenly in each part of the cold insulation chamber 400.
[0136]
In the timing chart shown in FIG. 9, the phase of the generated magnetic field is always the same in the two synchronized frost adhesion preventing devices 2, but the phase is not necessarily the same. For example, in the two synchronized frost adhesion preventing devices 2, the phase of the generated magnetic field may be shifted by a half wavelength.
[0137]
Further, the maximum strength of the magnetic field generated by each frost adhesion preventing device 2 may be substantially equal or different in each frost adhesion preventing device 2.
[0138]
Further, in the timing chart shown in FIG. 9, the generation timings of the magnetic fields from the two frost adhesion preventing devices 2 are synchronized, and the combination of the synchronized frost adhesion preventing devices 2 is changed over time. There may be three frost adhesion preventing devices 2 that synchronize with each other.
[0139]
Moreover, you may control the generation | occurrence | production timing (generation pattern) of the magnetic field from each frost adhesion prevention apparatus 2 as shown in FIG. 10, for example.
[0140]
That is, the third frost adhesion preventing device 2C and the fifth frost adhesion prevention are generated while continuously generating an alternating magnetic field having a predetermined frequency from the second frost adhesion preventing device 2B and the fourth frost adhesion preventing device 2D. An alternating magnetic field having a predetermined frequency may be generated discontinuously (intermittently) from the device 2E.
[0141]
In this case, the generation timing of the magnetic field from the third frost deposition prevention device 2C and the generation timing of the magnetic field from the fifth frost deposition prevention device 2E may or may not be synchronized.
[0142]
Moreover, the frequency of the alternating magnetic field generated from each frost adhesion preventing device 2 may be the same or different.
[0143]
Next, a fifth embodiment of the cool box according to the present invention will be described. Hereinafter, the cool box of the fifth embodiment will be described with a focus on the differences from the first to fourth embodiments described above, and the description of the same matters will be omitted.
[0144]
FIG. 11 is a schematic diagram illustrating an installation example of the frost adhesion preventing device included in the cold storage according to the fifth embodiment.
[0145]
The cool box 10 of the fifth embodiment is the same as the fourth embodiment except that the arrangement of the frost adhesion preventing device 2 is different.
[0146]
That is, in 5th Embodiment, as shown in FIG. 11, among the 2nd frost adhesion prevention apparatuses 2B-5E installed so that a magnetic field could be applied toward the cold storage chamber 400, The surface facing the stored item of the second frost adhesion preventing device 2B and the surface facing the stored item of the third frost adhesion preventing device 2C are located on the same surface, and the fourth frost adhesion preventing method. It arrange | positions so that the surface which opposes the preservation | save of apparatus 2D and the surface which opposes the preservation | save of 5th frost adhesion prevention apparatus 2E may be located on the same surface. Moreover, the 2nd frost adhesion prevention apparatus 2B and the 5th frost adhesion prevention apparatus 2E are arrange | positioned so that it may face, 3C frost adhesion prevention apparatus 2C, and 4th frost adhesion prevention The device 2D is arranged to face each other.
[0147]
The generation timing (generation pattern) of the magnetic field from each frost adhesion preventing device 2 can be controlled, for example, in the same manner as in FIG. 9 or FIG.
[0148]
Next, 6th Embodiment of the cool box of this invention is described. Hereinafter, the cool box of the sixth embodiment will be described focusing on the differences from the first to fifth embodiments described above, and the description of the same matters will be omitted.
[0149]
FIG. 12 is a schematic diagram illustrating an installation example of a frost adhesion preventing device included in the cold storage according to the sixth embodiment.
[0150]
The cool box 10 of the sixth embodiment is the same as the fourth and fifth embodiments except that the arrangement of the frost adhesion preventing device 2 is different.
[0151]
That is, in 6th Embodiment, as shown in FIG. 12, among the 2nd frost adhesion prevention apparatuses 2B-5E installed so that a magnetic field could be applied toward the cold storage chamber 400, The 5th frost adhesion prevention apparatus 2E is provided integrally with the mounting part 7 (especially tray 71). Thereby, the distance of a preservation | save thing and the 5th frost adhesion prevention apparatus 2E can always be shortened. As a result, it is possible to further enhance the effect of subdividing the water cluster around the preserved material, and to more reliably prevent or suppress frost from adhering to the surface of the preserved material. Moreover, since the number of the frost adhesion prevention apparatus 2 installed as another member can be reduced, it is advantageous for the capacity increase and space saving of a cool box.
[0152]
In addition, by arranging the second frost adhesion preventing device 2B to the fifth frost adhesion preventing device 2E in this way, the surface of the fifth frost adhesion preventing device 2E facing the stored matter is the second frost adhesion. It is substantially orthogonal to the surfaces of the prevention device 2B, the third frost adhesion prevention device 2C, and the fourth frost adhesion prevention device 2D that face the stored items. Thereby, the shape of the magnetic field applied to the cold insulation chamber 400 and the direction of the lines of magnetic force in the cold insulation chamber 400 can be efficiently changed three-dimensionally. Thereby, in the cold room 400, the subdivision of the water clusters can be promoted uniformly and efficiently.
[0153]
The generation | occurrence | production timing (generation pattern) of the magnetic field from each frost adhesion prevention apparatus 2 is controllable like FIG. 9, for example. Thereby, in the cold room 400, generation | occurrence | production of a magnetic field is controlled so that a magnetic force line may rotate three-dimensionally. As a result, the water clusters can be made finer evenly in each part of the cold insulation chamber 400.
[0154]
Moreover, the generation | occurrence | production timing (generation pattern) of the magnetic field from each frost adhesion prevention apparatus 2 can also be controlled like FIG.
[0155]
In such a refrigerator 10, various stored items can be stored in a refrigerated state or a frozen state. As this preserved material, for example, food (including beverages), feed, living tissue (for example, blood (blood component), organ, skin tissue, muscle tissue, nerve tissue, bone tissue, cartilage tissue, and various other tissues, Various cells such as germ cells, etc.), fresh flowers, medicines (including pharmaceuticals, reagents, etc.) and those containing at least one of these, and these may be used as they are, for example, packing, packaging You may use in the state.
[0156]
Next, a seventh embodiment of the cool box according to the present invention will be described. Hereinafter, the cool box of the seventh embodiment will be described focusing on the differences from the first to sixth embodiments described above, and the description of the same matters will be omitted.
[0157]
FIG. 13: is sectional drawing which shows typically 7th Embodiment of the cool box of this invention.
The cool box 10 of the seventh embodiment has a low temperature gas supply means (fan 9 and dehumidifier 11) for supplying a low temperature gas (cold air) with less water vapor content than the outside air (atmosphere outside the cool box 10). Except for this, it has the same configuration as the first embodiment.
[0158]
Thus, by having the low temperature gas supply means in the cool box 10, generation of frost in the cool box 10 (cold chamber 200) can be effectively prevented, and as a result, frost adheres to the inside of the box. Can be more effectively prevented. In particular, as in this embodiment, by having both the frost adhesion preventing device and the low-temperature gas supply means, these can act synergistically and more effectively prevent frost adhesion in the warehouse. it can. The low temperature gas may have any composition, for example, He gas, Ar gas, N ₂ An inert gas such as a gas, air, or the like can be used. By using air (low-temperature air) as the low-temperature gas, the above-described effects can be sufficiently exhibited while the structure of the cool box 10 is relatively simple. In addition, when an inert gas is used as the cold / hot gas, even if the stored product is susceptible to an adverse effect due to oxidation or the like, such an adverse effect can be more effectively prevented. In the following description, it is assumed that cold air is used as the low temperature gas. In the present embodiment, the low temperature gas supply means has a dehumidifying device 11 for dehumidifying the low temperature gas (cold air) heat-exchanged by the heat exchanger 8 and a fan 9 for circulating the dehumidified low temperature gas. It is.
[0159]
The dehumidifier 11 includes a dehumidifier 110 having a dryer, a recovery port (not shown) for collecting low-temperature gas (atmosphere gas inside the cold insulation chamber 200), and a discharge port (not shown) for discharging low-temperature gas. The discharge part 111, the introduction path 112 which introduces the low temperature gas collect | recovered at the collection port into the dehumidifier 110, and the sending path 113 which sends out the low temperature gas which the dehumidifier 110 dehumidified to the conducting / exhaust part 111 are provided. The conducting and discharging unit 111 of the dehumidifying device 11 is disposed inside the cold insulation chamber 200 and is connected to the evaporator 81 at the recovery port and is connected to the fan 9 described later at the discharge port.
[0160]
Such a dehumidifying apparatus 11 has the effect | action which keeps the inside of the cool room 200 in a dry state by performing dehumidification of the low temperature gas which circulates the inside of the cool room 200. FIG.
[0161]
That is, the dehumidifying device 11 collects the low-temperature gas (cold air) heat-exchanged by the heat exchanger 8 at the collection port of the introduction / discharge unit 111, introduces the low-temperature gas collected by the introduction path 112 to the dehumidifier 110, and dehumidifies it. The low-temperature gas introduced by the vessel 110 is dehumidified, the delivery path 113 sends the dehumidified low-temperature gas to the lead / exhaust unit 111, and the discharge port of the lead / exhaust unit 111 sends the dehumidified low-temperature gas via the fan 9. By discharging to the inside of the cold room 200, the inside of the cold room 200 is kept dry. The dehumidifier 11 will be described in detail later.
[0162]
The fan (circulation device) 9 has a function of circulating the cold and dehumidified low-temperature gas inside the cool box main body 101. As a result, variations in temperature and humidity at each part inside the cold room 200 are reduced, and frost can be more reliably prevented from being adhered to the entire cold room 200, and a stored item stored in the cold room 200. Can be cooled and frozen at a more stable cooling rate, and deterioration of the quality of stored products can be prevented more reliably.
[0163]
Although the ventilation speed (air flow rate) from the fan 9 is not specifically limited, For example, it is preferable that it is 0.5-10 m / s, and it is more preferable that it is 2-8 m / s.
[0164]
If the blowing speed from the fan 9 is less than the lower limit value, there is a possibility that variations in temperature and humidity in each part inside the cold insulation chamber 200 cannot be made sufficiently small depending on the volume of the cold insulation chamber 200 or the like. . On the other hand, if the blowing speed from the fan 9 exceeds the upper limit value, the function of each frost adhesion preventing device 2 may not be sufficiently exhibited.
[0165]
The water vapor content of the low temperature gas supplied by the low temperature gas supply means is not particularly limited as long as it is less than the water vapor content (content rate) of the outside air, but is 4.0 × 10. ^-3 g / L or less is preferable, and 3.0 × 10 ^-3 g / L or less is more preferable, and 2.0 × 10 ^-4 More preferably, it is g / L or less. Thereby, the effect mentioned above becomes further remarkable.
[0166]
In particular, in the present embodiment, the low-temperature gas supply means includes a fan (circulation device) 9 that circulates low-temperature gas (cold air) inside the cold room 200 and a dehumidification device 11 that dehumidifies the circulating low-temperature gas. Is. Thereby, the low temperature gas with little water vapor | steam content can be efficiently supplied in the cold storage chamber 200. FIG. As a result, the above-described effect becomes more remarkable.
[0167]
Moreover, by having the dehumidifying device 11, the atmospheric gas inside the cold insulation chamber 200 can be repeatedly used (circulated) as the low-temperature gas. Thereby, the supply of gas from the outside of the cold room 200 during operation of the cold box 10 or the like becomes unnecessary (or the amount of gas supplied from the outside of the cold room 200 can be reduced). As a result, the energy efficiency of the cool box 10 can be made particularly excellent, and the structure of the cool box 10 can be simplified.
[0168]
In this embodiment, the pump P is connected to the dehumidifier 11 (dehumidifier 110). As a result, the exhaust amount of the dehumidifier 11 into the cool chamber 200 can be made larger than the intake air amount from the cool chamber 200 by the dehumidifier 11. That is, in the present embodiment, the pressure inside the cold insulation chamber 200 can be made relatively high compared to the pressure outside the cold insulation chamber 200. As a result, it is possible to effectively prevent moisture from entering into the inside of the cold chamber 200 (particularly, when the stored material is introduced or when the stored material is taken out). Can be prominent. Note that the pump P may or may not always operate during operation of the cool box 10. For example, the pump P may be controlled so as to operate at an initial stage (or a predetermined time after performing an opening / closing operation of a door not shown) during operation of the cool box 10 and then stop. Good. Further, the cool box 10 may have a pressure sensor (not shown) that detects the pressure in the cool chamber, and the operation of the pump P may be controlled by the pressure value detected by the pressure sensor. As described above, by controlling the operation of the pump P, it is possible to save energy while sufficiently exhibiting the above-described effects.
[0169]
During operation of the cool box 10, the inside of the cool room 200 is preferably maintained at a pressure higher by 100 Pa or more than the pressure outside the cool room 200, and is maintained at a pressure higher than 1000 Pa. More preferably, the pressure is maintained at a pressure higher than 3000 Pa. Thereby, the effect mentioned above becomes further remarkable.
[0170]
Further, during operation of the cool box 10, the pressure inside the cool room 200 is 1.02 × 10 6. ⁵ It is preferably Pa or more, 1.03 × 10 ⁵ More preferably, it is Pa or more, 1.05 × 10 ⁵ ~ 8x10 ⁵ More preferably, it is Pa. Thereby, the effect mentioned above becomes further remarkable.
[0171]
Moreover, it is preferable that the conducting / discharging unit 111 of the dehumidifying device 11 has low temperature resistance capable of withstanding the temperature inside the cold insulation chamber 200. Thereby, since the durability of the dehumidifying device 11 is improved, the cool box 10 exhibits a stable effect over a long period of time. Moreover, since it is not necessary to replace the guiding / discharging unit 111 (or since the number of replacements of the guiding / discharging unit 111 can be reduced), maintenance of the cool box 10 is facilitated.
[0172]
By the way, in general, the density of the gas in the low temperature state is larger than the density in the high temperature state. Therefore, in the cold room (cold box), the upper temperature may be higher than the lower temperature. On the other hand, in the cool box of the present embodiment, the fan (circulator) 9 and the guide / discharge part 111 of the dehumidifier 11 are provided on the upper part (ceiling part) of the cool box 10 (the cool box 200). Thereby, the atmosphere (gas) in the cold insulation chamber 200 can be stirred efficiently, and the temperature variation in each part can be made smaller. Further, for example, even when the volume of the cold insulation chamber 200 is relatively large, the temperature variation at each part in the cold insulation chamber 200 can be more reliably reduced.
[0173]
The low temperature gas supply means as described above may or may not always operate during the operation of the cool box 10. For example, the low temperature gas supply means may be controlled so as to operate at an initial stage and then stop during the operation of the cool box 10, and repeats the operation and the stop every predetermined time. It may be a thing. Further, as shown in FIG. 13, the cool box 10 has a humidity sensor (humidity detection means) 12 for detecting the humidity in the cold room, and the low temperature gas supply means (in accordance with the humidity value detected by the humidity sensor 12). The operation of at least one of the fan 9 and the dehumidifying device 11 may be controlled. As described above, by controlling the operation of the low-temperature gas supply means, it is possible to save energy while sufficiently exhibiting the above-described effects.
[0174]
In the above description, the low temperature gas is supplied to the cold insulation chamber 200 by the low temperature gas supply means. However, the low temperature gas may be supplied to the cold insulation chamber 300, or the low temperature gas may be supplied. Needless to say, the configuration may be such that is supplied to both the cold insulation chamber 200 and the cold insulation chamber 300.
[0175]
Moreover, in FIG. 13, only the principal part of the cool box 10 is shown, and the compressor 82, the aggregator 83, the refrigerant pipes 84 and 85, etc. of the heat exchanger 8 are omitted.
[0176]
Next, an eighth embodiment of the cool box according to the present invention will be described. Hereinafter, the cool box of the eighth embodiment will be described focusing on the differences from the first to seventh embodiments described above, and the description of the same matters will be omitted.
[0177]
FIG. 14 is a schematic view showing an eighth embodiment of the cold storage according to the present invention.
The cool box 10 according to the eighth embodiment has a low temperature gas supply means for supplying a low temperature gas (cold air) with less water vapor content than the outside air (atmosphere outside the cool box 10) and a humidity sensor 12. Has the same configuration as that of the second embodiment. The low-temperature gas supply means provided in the cool box of the present embodiment has the same configuration as the low-temperature gas supply means provided in the cool box of the seventh embodiment.
[0178]
Thus, by having the low temperature gas supply means in the cool box 10, generation of frost in the cool box 10 (cold chamber 200) can be effectively prevented, and as a result, frost adheres to the inside of the box. Can be more effectively prevented. In particular, as in this embodiment, by having both the frost adhesion preventing device and the low-temperature gas supply means, these can act synergistically and more effectively prevent frost adhesion in the warehouse. it can.
[0179]
In addition, it cannot be overemphasized that the low temperature gas supply means mentioned above is applicable also to the cool box of the said 3rd-6th embodiment.
[0180]
As mentioned above, although this invention was demonstrated based on suitable embodiment, this invention is not limited to these.
[0181]
For example, the number and arrangement of the frost adhesion preventing devices are not limited to those in the above embodiment, and can be set arbitrarily.
[0182]
Moreover, although embodiment mentioned above demonstrated the cold storage of the structure to which the frost adhesion prevention apparatus was fixed, the structure which moves may be sufficient as a frost adhesion prevention apparatus. This makes it possible to change the magnetic field around the storage space and the stored items in a more complicated manner, and to more efficiently subdivide the water clusters contained in the atmosphere. Examples of the cool box having such a configuration include a belt conveyor type tunnel type cool box.
[0183]
Moreover, although each embodiment mentioned above demonstrated what has a flat shape as a frost adhesion prevention apparatus, the shape and form of a frost adhesion prevention apparatus are not specifically limited, For example, cylindrical shape Any shape such as a curved plate shape or a rod shape may be used.
[0184]
Moreover, although embodiment mentioned above demonstrated the structure which has two or more frost adhesion apparatuses, at least one frost adhesion prevention apparatus should just be provided.
[0185]
Further, in the second to sixth embodiments described above, the structure having one fan and one heat exchanger (cooling means) has been described, but the structure having a plurality of fans and heat exchangers. Also good.
[0186]
In addition, the form of the cold storage to which the frost adhesion preventing apparatus of the present invention can be applied is not limited to the above-described embodiment. For example, various household or commercial refrigerators, freezers, refrigerators, sushi, fresh foods, etc. Display cases, ice machines, etc.
[0187]
In the above-described embodiment, the magnetic field generated by the frost adhesion preventing apparatus has been described as the intensity of which changes with time. However, the magnetic field generated by the frost adhesion preventing apparatus has a constant intensity (steady magnetic field). There may be.
[0188]
Moreover, although the thing of the structure which has one dehumidification apparatus was demonstrated in 7th, 8th embodiment mentioned above, the thing of the structure which has two or more dehumidification apparatuses may be sufficient.
[0189]
In the seventh and eighth embodiments described above, the configuration using the dehumidifying device provided as the low temperature gas supply means has been described. However, the low temperature gas supply means supplies a low temperature gas having a lower water vapor content than the outside air. For example, a gas cylinder containing a gas (including a liquefied gas) such as an inert gas may be used. Thus, when the low-temperature gas supply means has a gas cylinder, the temperature of the injected gas is relatively easily lowered as the gas volume changes when the gas is injected from the cylinder. Can be. Further, if the low-temperature gas supply means has a gas cylinder, the temperature in the cool box can be made sufficiently low relatively easily even if the cooling capacity of the heat exchanger is relatively low. Moreover, the power consumption of the cold storage can be suppressed. In addition, when an inert gas is used as the supplied cold and hot gas, even if the stored product is susceptible to an adverse effect due to oxidation or the like, such an adverse effect can be more effectively prevented.
[0190]
【Example】
Example 1
A cool box having a configuration as shown in FIGS. 1 and 2 was produced and operated under the following conditions.
[0191]
The generation pattern of the magnetic field generated by each upper frost adhesion preventing device was controlled as shown in FIG. 3, and the generation pattern of the magnetic field generated by each lower frost adhesion prevention device was controlled as shown in FIG. The magnetic field generated by each frost adhesion preventing device was an alternating magnetic field of 60 Hz.
[0192]
In addition, the maximum strength (absolute value) of the total magnetic field generated by each upper frost deposition prevention device is 2000 Gs, and the maximum strength (absolute value) of the total magnetic field generated by each lower frost deposition prevention device is 1500 Gs.
[0193]
Under these conditions, packed Chinese noodles (preserved materials) are stored in the upper and lower cold storage chambers (storage spaces), the upper cold chamber temperature is set to -10 ° C, and the lower cold storage chamber is stored. The cold storage was operated so as to keep the temperature at 4 ° C.
[0194]
(Example 2)
A cold box as shown in FIG. 5 was produced and operated under the following conditions. In addition, the installation number and arrangement | positioning of each frost adhesion prevention apparatus were made to show in FIG.
[0195]
The magnetic field generated by each frost adhesion preventing device was an alternating magnetic field of 60 Hz.
The generation pattern of the magnetic field generated by the second to fourth frost adhesion preventing devices was controlled as shown in FIG.
[0196]
In addition, the maximum intensity (absolute value) of the sum of the magnetic fields generated by the second to fourth frost adhesion preventing devices was 2000 Gs.
Moreover, the ventilation speed from the fan was set to 3.5 m / s.
[0197]
Under these conditions, the cold storage was operated so that the Chinese noodles (preserved material) packed in the cold storage room were stored and the temperature of the cold storage room was kept at -20 ° C.
[0198]
(Example 3)
The arrangement of the frost adhesion preventing devices is as shown in FIG. 7, and the magnetic field generated by the second to fourth frost adhesion preventing devices is controlled as shown in FIG. The cold storage was operated under the same conditions as in Example 2.
[0199]
Example 4
Except that the number and arrangement of the frost adhesion preventing devices are set as shown in FIG. 8, and the generation pattern of the magnetic field generated by the second to fifth frost adhesion preventing devices is controlled as shown in FIG. A cold storage similar to 2 was prepared, and the cold storage was operated under the same conditions as in Example 2.
[0200]
The maximum intensity (absolute value) of the sum of the magnetic fields generated by the second to fifth frost adhesion preventing devices was 2800 Gs.
[0201]
(Example 5)
The arrangement of each frost prevention device is as shown in FIG. 11, and the generation pattern of the magnetic field generated by the second to fifth frost prevention devices is controlled as shown in FIG. The cold storage was operated under the same conditions as in Example 4.
[0202]
(Example 6)
The arrangement of the frost adhesion preventing devices is as shown in FIG. 12, and the generation pattern of the magnetic field generated by the second to fifth frost adhesion preventing devices is controlled as shown in FIG. The cold storage was operated under the same conditions as in Example 4.
[0203]
(Example 7)
Except having a low temperature gas supply means and a humidity sensor, a cool box similar to that of Example 1 described above, that is, a cool box as shown in FIG. 13 was produced and operated under the following conditions.
[0204]
The generation pattern of the magnetic field generated by each upper frost adhesion preventing device was controlled as shown in FIG. 3, and the generation pattern of the magnetic field generated by each lower frost adhesion prevention device was controlled as shown in FIG. The magnetic field generated by each frost adhesion preventing device was an alternating magnetic field of 60 Hz.
[0205]
In addition, the maximum strength (absolute value) of the total magnetic field generated by each upper frost deposition prevention device is 2000 Gs, and the maximum strength (absolute value) of the total magnetic field generated by each lower frost deposition prevention device is 1500 Gs.
[0206]
Moreover, the ventilation speed from the fan was 4 m / s. In addition, cold air was used as the low temperature gas.
[0207]
In addition, by driving the pump for a predetermined time (one hour) from the start of operation of the cool box, air is taken in from the outside of the cool box, so that the pressure in the cool box is higher than the external pressure. As a result, the pressure in the upper cold storage chamber is 1.07 × 10 6 during the operation of the cold storage. ⁵ ~ 8x10 ⁵ The operation of the pump P was appropriately controlled so that the pressure was maintained at Pa and higher than the pressure outside the cold storage chamber by 4000 Pa or more. The water vapor content of the low temperature gas supplied by the low temperature gas supply means is 1.0 × 10 ⁴ It was below g / L.
[0208]
In addition, the low-temperature gas supply device (dehumidification device) is driven when the humidity detected by the humidity sensor exceeds 10% RH, and the low-temperature gas supply device (dehumidification device) is stopped when the humidity is 10% RH or less. Controlled to do.
[0209]
Under these conditions, packed Chinese noodles (preserved materials) are stored in the upper and lower cold storage chambers (storage spaces), the upper cold chamber temperature is set to -10 ° C, and the lower cold storage chamber is stored. The cold storage was operated to keep the temperature at 4 ° C.
[0210]
(Example 8)
A cool box similar to that of Example 2 except that the low temperature gas supply means and the humidity sensor were provided, that is, a cool box as shown in FIG. 14 was manufactured and operated under the following conditions.
[0211]
The magnetic field generated by each frost adhesion preventing device was an alternating magnetic field of 60 Hz.
The generation pattern of the magnetic field generated by the second to fourth frost adhesion preventing devices was controlled as shown in FIG.
[0212]
In addition, the maximum intensity (absolute value) of the sum of the magnetic fields generated by the second to fourth frost adhesion preventing devices was 2000 Gs.
[0213]
Moreover, the ventilation speed from the fan was set to 3.5 m / s. In addition, cold air was used as the low temperature gas.
[0214]
The water vapor content of the low temperature gas supplied by the low temperature gas supply means is 1.0 × 10 ⁴ It was below g / L. In addition, by driving the pump for a predetermined time (one hour) from the start of operation of the cool box, air is taken in from the outside of the cool box, so that the pressure in the cool box is higher than the external pressure. As a result, the pressure inside the cold insulation chamber is 1.07 × 10 in the operation of the cold storage. ⁵ ~ 8x10 ⁵ The operation of the pump P was appropriately controlled so that the pressure was maintained at Pa and higher than the pressure outside the cold storage chamber by 4000 Pa or more.
[0215]
In addition, the low-temperature gas supply device (dehumidification device) is driven when the humidity detected by the humidity sensor exceeds 10% RH, and the low-temperature gas supply device (dehumidification device) is stopped when the humidity is 10% RH or less. Controlled to do.
[0216]
Under these conditions, the cold storage was operated so that the Chinese noodles (preserved material) packed in the cold storage room were stored and the temperature of the cold storage room was kept at -20 ° C.
[0217]
Example 9
Except that the arrangement of each frost adhesion preventing device is as shown in FIG. 7, a cold storage similar to that in Example 8 is prepared, and the generation pattern of the magnetic field generated by the second to fourth frost adhesion preventing devices is illustrated. 4 under the same conditions as in Example 8 except that each frost adhesion prevention device and the low-temperature gas supply device (dehumidification device) were controlled to repeat operation and stop every hour. The cold storage was activated.
[0218]
(Example 10)
Except that the number and arrangement of the frost adhesion preventing devices are as shown in FIG. 8, a cold storage similar to that of Example 8 is prepared, and the generation of the magnetic field generated by the second to fifth frost adhesion preventing devices is generated. The pattern is shown in FIG. 9, and the cold storage box is operated under the same conditions as in Example 8 except that the frost adhesion prevention device and the low temperature gas supply device are driven for a predetermined time (50 hours) from the start of the cold storage operation. Was activated.
[0219]
The maximum intensity (absolute value) of the sum of the magnetic fields generated by the second to fifth frost adhesion preventing devices was 2800 Gs.
[0220]
(Example 11)
Except for the arrangement of each frost adhesion preventing device as shown in FIG. 11, a cold storage similar to that of Example 10 is prepared, and the generation pattern of the magnetic field generated by the second to fifth frost adhesion preventing devices is illustrated. When the frost adhesion prevention device is driven for a predetermined time (50 hours) from the start of operation of the cold storage, and the humidity detected by the humidity sensor exceeds 10% RH. The cool box is operated under the same conditions as in Example 10 except that the low temperature gas supply device (dehumidification device) is driven and controlled so that the low temperature gas supply device (dehumidification device) stops in a state of 10% RH or less. Activated.
[0221]
(Example 12)
Except that the arrangement of each frost adhesion preventing device is as shown in FIG. 12, a cold storage similar to that in Example 10 is prepared, and the generation pattern of the magnetic field generated by the second to fifth frost adhesion preventing devices is illustrated. 10 is controlled so that each frost adhesion preventing device repeatedly operates and stops every hour, and when the humidity detected by the humidity sensor exceeds 10% RH. The cool box is operated under the same conditions as in Example 10 except that the low temperature gas supply device (dehumidification device) is driven and controlled so that the low temperature gas supply device (dehumidification device) stops in a state of 10% RH or less. Activated.
[0222]
(Comparative Example 1)
Except not having the frost adhesion prevention apparatus, the cold storage similar to the said Example 1 was produced, and the cold storage was operated on the same conditions as the said Example 1. FIG.
[0223]
(Comparative Example 2)
Except not having a frost adhesion prevention device, the cold storage similar to the said Example 2 was produced, and the cold storage was operated on the same conditions as the said Example 2. FIG.
[0224]
[Evaluation]
After the cold storage of each Example and each Comparative Example was operated continuously for 120 days, the adhesion state of frost (ice) in the cold storage was visually confirmed.
[0225]
The adhesion state of frost (ice) was evaluated according to the following four-stage criteria.
(Double-circle): The adhesion of frost was not recognized at all.
○: Slight adhesion of frost was observed.
Δ: Adherence of frost and small ice particles was observed.
X: A large ice block was observed.
The results are shown in Table 1.
[0226]
[Table 1]

[0227]
As is clear from Table 1, in all the cold storages of the examples (the present invention), frost adhesion was suitably prevented or suppressed.
[0228]
On the other hand, a large ice lump was confirmed in each of the refrigerators of the comparative examples. Moreover, in the cool box of each comparative example, the amount of power consumption tended to increase with the passage of days.
[0229]
Moreover, about Examples 7-12, the cool storage was operated continuously for 120 days (total 240 days), and the adhesion state of the frost in the subsequent cool storage was evaluated according to the same criteria as described above. As a result, in all cases, no frost was observed.
[0230]
【The invention's effect】
As described above, according to the present invention, frost adhesion can be prevented or suppressed, and an increase in power consumption and a decrease in the quality of stored materials can be prevented.
[0231]
Moreover, the said effect improves more by setting suitably the installation number and arrangement | positioning of a frost adhesion prevention apparatus.
[Brief description of the drawings]
FIG. 1 is a schematic view showing a first embodiment of a cold box according to the present invention.
2 is a schematic diagram (viewed from the rear) showing the configuration of a heat exchanger (cooling means) and a frost adhesion preventing device included in the cool box shown in FIG. 1. FIG.
FIG. 3 is an example of a timing chart showing the generation timing of a magnetic field from each frost adhesion preventing device.
FIG. 4 is an example of a timing chart showing the generation timing of a magnetic field from each frost adhesion preventing device.
FIG. 5 is a schematic view showing a second embodiment of the cool box according to the present invention.
6 is a schematic view showing an installation example of a frost adhesion preventing device included in the cold storage shown in FIG.
FIG. 7 is a schematic diagram illustrating an installation example of a frost adhesion preventing device included in the cold storage according to the third embodiment.
FIG. 8 is a schematic diagram illustrating an installation example of a frost adhesion preventing apparatus included in the cold storage according to the fourth embodiment.
FIG. 9 is an example of a timing chart showing the generation timing of a magnetic field from each frost adhesion preventing device.
FIG. 10 is an example of a timing chart showing the generation timing of the magnetic field from each frost adhesion preventing device.
FIG. 11 is a schematic diagram illustrating an installation example of a frost adhesion preventing device included in a cold storage according to a fifth embodiment.
FIG. 12 is a schematic diagram illustrating an installation example of a frost adhesion preventing apparatus included in the cold storage according to the sixth embodiment.
FIG. 13 is a cross-sectional view schematically showing a seventh embodiment of the cool box according to the present invention.
FIG. 14 is a schematic view showing an eighth embodiment of the cold box according to the present invention.
[Explanation of symbols]
10 Cold storage
100 box
102 Side wall
103 Bulkhead
104 Ceiling
105 machine room
200 Cold room
300 Cold room
101 Cold storage body
400 Cold room
2 (2A, 2B, 2C, 2D, 2E) Frost adhesion prevention device
21 coils
22 Non-magnetic cover
20 Control device
7 Placement section
71 trays
8 Heat exchanger (cooling means)
81 Plate evaporator, evaporator
811 Plate (base)
812 flow path
82 Compressor
83 Condenser
84 Refrigerant piping
85 Refrigerant piping
9 fans
11 Dehumidifier
110 Dehumidifier
111 Leading and discharging part
112 Introduction
113 Sending path
12 Humidity sensor
P pump

Claims (21)

A cool box that stores stored items in a storage space and can be stored in a refrigerated state or a frozen state,
A cooling means comprising an evaporator and keeping the storage space at a low temperature;
A plurality of frost adhesion preventing devices having a function of preventing or suppressing frost from adhering to the inside of the cold storage by applying a magnetic field;
Three or more frost adhesion preventing devices are provided,
The generation timing of the magnetic field is controlled so that the generation timing of the magnetic field from at least two of the frost adhesion prevention devices is synchronized and different from the generation timing of the magnetic field from one or more other frost adhesion prevention devices. A combination of two or more frost adhesion preventing devices synchronized in timing changes with time. Refrigerator according to claim 1 having a low-temperature gas supply means for supplying a little cool gas with the content of water vapor from the ambient air. The cold storage container according to claim 2 , wherein the low temperature gas supply means includes a dehumidifying device for dehumidifying the low temperature gas. The cold insulator according to claim 2 or 3 , wherein the low-temperature gas supply means maintains the pressure value of the storage space at or above the pressure value outside the cold insulator. The cool box according to any one of claims 2 to 4, wherein the operation and stop of the low-temperature gas supply means are repeated every predetermined time. The cold storage according to any one of claims 2 to 5 , further comprising humidity detection means for detecting humidity in the cold storage, and controlling the operation of the low-temperature gas supply means according to the detection result. The cold storage according to any one of claims 1 to 6, wherein the frost adhesion preventing device is configured to change the magnetic field strength over time. The cold storage box according to any one of claims 1 to 7 , wherein at least two frost adhesion preventing devices are arranged to face each other . The cool storage box according to any one of claims 1 to 8 , wherein the plurality of frost adhesion preventing devices are arranged so that surfaces facing the stored items are substantially orthogonal to each other. Each said frost deposition prevention apparatus, either a flat plate shape, and the frost deposition prevention apparatus Adjacent, refrigerator according to any one of claims 1 to 9 is arranged to be substantially perpendicular. The cold storage according to any one of claims 1 to 10 , wherein at least one of the plurality of frost adhesion preventing devices is installed in the storage space. The cold storage according to any one of claims 1 to 11, wherein the frost adhesion preventing device is installed in the vicinity of the evaporator. The cold storage box according to claim 12 , wherein the frost adhesion preventing device is disposed closer to the storage space than the evaporator. The cold storage according to any one of claims 1 to 13, wherein the frost adhesion preventing device and the evaporator are arranged so as to face each other . The cool box according to any one of claims 1 to 14 , further comprising a fan for circulating the cooled gas in the storage space. The cool box according to claim 15 , wherein a blowing speed from the fan is 0.5 to 10 m / s. The cool box according to any one of claims 1 to 16, further comprising a placement unit for placing the stored material. The cold storage according to claim 17 , wherein the frost adhesion preventing device is disposed in the mounting portion or in the vicinity thereof. The cold storage according to any one of claims 1 to 18 , wherein generation of a magnetic field from the frost adhesion preventing device is controlled so that a direction of a line of magnetic force rotates in the storage space. The cold storage box according to any one of claims 1 to 19, wherein the frost adhesion preventing device generates an alternating magnetic field. The cold storage box according to any one of claims 1 to 20, wherein the frost adhesion preventing device has low temperature resistance.

Images