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JP2004218889A - Cool storage material - Google Patents

Cool storage material Download PDF

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Publication number
JP2004218889A
JP2004218889A JP2003004790A JP2003004790A JP2004218889A JP 2004218889 A JP2004218889 A JP 2004218889A JP 2003004790 A JP2003004790 A JP 2003004790A JP 2003004790 A JP2003004790 A JP 2003004790A JP 2004218889 A JP2004218889 A JP 2004218889A
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JP
Japan
Prior art keywords
container
cold storage
storage material
cooled
mesh
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2003004790A
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Japanese (ja)
Inventor
Seiji Onoki
晟二 小野木
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Chemical Corp
Original Assignee
Mitsubishi Chemical MKV Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Chemical MKV Co filed Critical Mitsubishi Chemical MKV Co
Priority to JP2003004790A priority Critical patent/JP2004218889A/en
Publication of JP2004218889A publication Critical patent/JP2004218889A/en
Pending legal-status Critical Current

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  • Storage Of Fruits Or Vegetables (AREA)
  • Freezing, Cooling And Drying Of Foods (AREA)

Abstract

【課題】野菜などを低温輸送する際に保冷容器に収容される蓄冷材であって、冷凍障害を起こすことなく被冷却物および保冷容器内を効率的に冷却できる蓄冷材を提供する。
【解決手段】蓄冷材は、扁平な容器(1)に液状物を封入して成り、かつ、容器(1)の少なくとも一方の盤面にネット、格子状成形体などの網状体(3)が設けられており、網状体(3)により、容器(1)盤面への被冷却物(6)の直接接触を防止すると共に、容器(1)の盤面と被冷却物(6)との間に冷気発生用の空間部を構成する。
【選択図】 図1
An object of the present invention is to provide a cold storage material that is stored in a cold storage container when vegetables and the like are transported at a low temperature, and that can efficiently cool an object to be cooled and the inside of the cold storage container without causing a freezing failure.
A regenerator material is formed by enclosing a liquid material in a flat container (1), and a net (3) such as a net or a grid-like molded body is provided on at least one board surface of the container (1). The mesh body (3) prevents the object to be cooled (6) from coming into direct contact with the surface of the container (1), and cools the space between the surface of the container (1) and the object to be cooled (6). Construct a space for generation.
[Selection diagram] Fig. 1

Description

【0001】
【発明の属する技術分野】
本発明は、蓄冷材に関するものであり、詳しくは、野菜などを低温輸送する際に保冷容器に収容される蓄冷材であって、冷凍障害を起こすことなく被冷却物および保冷容器内を効率的に冷却できる蓄冷材に関するものである。
【0002】
【従来の技術】
高温期、温暖期における例えば野菜の低温輸送では、品質の劣化を防止するため、保冷容器に野菜と共に蓄冷材を収容して輸送している。周知の通り、蓄冷材は、容器に低融点の液状物を封入して成り、冷凍庫などで凍結させることにより繰り返し使用可能な簡易冷却剤である。上記の野菜の低温輸送においては、通常、冷気の流れを考慮し、保冷容器内の野菜の上部に蓄冷材を載せるが、その際、野菜の冷凍障害を防止するため、野菜の上に予め段ボールや薄い樹脂シートを敷き、蓄冷材と野菜の直接接触を防止している。
【0003】
【発明が解決しようとする課題】
ところで、蓄冷材を使用した上記の様な低温輸送においては、段ボール等に要する資材費と共に保冷容器への投入に手間が掛かるため、輸送コストを低減できないと言う実情がある。また、一旦使用した段ボール等は、廃棄物として処理しなければならず、社会的観点からも好ましくない。従って、上記の様な低温輸送においては、段ボール等を使用することなく、しかも、冷凍障害を惹起することなく、野菜や保冷容器内を効果的に冷却し得る手段が望まれる。
【0004】
本発明は、上記の実情に鑑みなされたものであり、その目的は、野菜などを低温輸送する際に保冷容器に収容される蓄冷材であって、冷凍障害を起こすことなく被冷却物および保冷容器内を効率的に冷却し得る改良された蓄冷材を提供することにある。
【0005】
【課題を解決するための手段】
上記の課題を解決するため、本発明の蓄冷材は、被冷却物と共に保冷容器に収容される蓄冷材であって、扁平な容器に液状物を封入して成り、かつ、前記容器の少なくとも一方の盤面に網状体が設けられていることを特徴とする。
【0006】
すなわち、上記の蓄冷材において、容器の盤面に設けられた網状体は、容器の盤面への被冷却物の直接接触を防止すると共に、容器の盤面と被冷却物との間に冷気発生用の空間部を構成する。
【0007】
【発明の実施の形態】
本発明に係る蓄冷材の一実施形態を図面に基づいて説明する。図1は、本発明に係る蓄冷材の外形の一例を示す裏面側から視た斜視図である。図2は、本発明に係る蓄冷材の使用方法を示す縦断面図である。
【0008】
本発明の蓄冷材は、図中に符号(1A)にて示されており、図2に示す様に、輸送や保管において低温管理すべき野菜などの被冷却物(6)と共に保冷容器(4)に収容して使用される。本発明の蓄冷材(1A)を適用する被冷却物(6)としては、凍結によって品質を損なう様な物品、例えば、冷凍障害を起し易いほうれん草、レタス、モヤシ等の野菜が挙げられる。
【0009】
被冷却物(6)及び蓄冷材(1A)を収容する保冷容器(4)としては、通常、内容積が10〜25リットル程度の発泡スチロール製の一体成形容器が使用される。また、保冷容器(4)は、4つの側壁の下端縁が底板の4辺部にヒンジや蝶番によって連結されることにより、各側壁を折畳み可能に構成された折畳み容器であってもよい。図2中の符号(5)は蓋を示す。
【0010】
本発明の蓄冷材(1A)は、図1に示す様に、扁平な容器(1)に水または融点の低い水溶液を封入して構成される。蓄冷材(1A)の容器(1)は、ポリエチレン等の熱可塑性樹脂から成り、保冷容器(4)内の隙間空間に収容し得る様に、また、保冷容器(4)内のより広い領域に冷気を供給し得る様に、扁平な形状に形成される。
【0011】
容器(1)の盤面形状(扁平な面の形状)は、適宜に設計できるが、図1に例示した蓄冷材(1A)は、略長方形の盤面形状を備え且つその長辺部に切欠き部(2)が設けられた容器(1)を使用して構成されたものである。切欠き部(2)は、保冷容器(4)への出し入れを容易にするための手掛部であり、また、図示しないが、容器(1)の盤面の中央には、取扱い性を高めるため、指掛け用の穴が設けられてもよい。
【0012】
容器(1)は、押出ブロー成形法により、あるいは、それぞれに射出成形した表側と裏側の各部材を溶着することにより製造することが出来る。なお、容器(1)の大きさは、図示した蓄冷材(1A)の場合、実用上、盤面の一辺の長さが10〜35cm程度、厚さが1〜3cm程度とされ、容器(1)の内容積は、300〜1500cm程度に設定される。
【0013】
容器(1)に封入される液状物は、一般的には水または塩化ナトリウム水溶液にゲル化剤を添加した低融点の水溶液である。上記の液状物は、通常、冷却効率と保冷容器内における占有体積を考慮し、融点が−20〜0℃程度、融解潜熱が40〜80Kcal/kg程度となる様に調製されるが、約20℃以下の冷蔵温度で管理すべき野菜などに適用する場合は、融点が−5〜0℃程度となる様に調製されるのが好ましい。
【0014】
本発明の蓄冷材(1A)においては、野菜などの被冷却物(6)の接触による冷凍障害を防止するため、上記の容器(1)の少なくとも一方の盤面に干渉材としての網状体(3)が設けられる。網状体(3)は、容器(1)の盤面における冷気の発生を阻害することなく、かつ、保冷容器(4)に蓄冷材(1A)を収容した場合に当該蓄冷材の容器(1)の盤面と被冷却物(6)とを離間させるためのものである。
【0015】
網状体(3)としては、樹脂製のネットや格子状の成形体が使用される。網状体(3)の1つの開口の大きさは0.3〜15cm、好ましくは2〜10cm、網状体(3)の厚さは1〜15mm、好ましくは2〜5mmに設定される。網状体(3)の開口の大きさを上記の範囲に設定する理由は次の通りである。すなわち、網状体(3)の開口が0.3cmよりも小さい場合は、容器(1)の盤面が閉鎖状態となるため、冷気の生成効率が悪くなり冷却能力に欠ける。一方、網状体(3)の開口が15cmよりも大きい場合は、被冷却物(6)が容器(1)の盤面に直接接触する虞がある。
【0016】
また、網状体(3)の厚さを上記の範囲に設定する理由は次の通りである。すなわち、網状体(3)の厚さが1mmよりも薄い場合は、容器(1)表面と被冷却物(6)との間に十分な空間が確保できず、過冷却により被冷却物(6)が凍結する虞がある。一方、網状体(3)の厚さが15mm厚い場合は、蓄冷材(1A)の全体の厚さが大きくなり、保冷容器(4)内での占有体積が増大するので実用的ではない。
【0017】
上記の網状体(3)は、容器(1)の盤面に対し、容器(1)の成形後に付設してもよいし、あるいは、容器(1)の成形時に金型構造によって容器(1)と一体的に形成してもよい。図1に例示した蓄冷材(1A)は、予め成形された容器(1)の盤面に格子状の網状体(3)を付設したものである。具体的には、容器(1)の一方の盤面は、外周部が膨出し且つ当該外周部以外の内側部が浅皿状に凹没した構造を備え、網状体(3)は、浅皿状の凹没部に嵌め込まれている。上記の様に、容器(1)の盤面の凹没部に網状体(3)を嵌合させた場合には、取扱い性を向上でき、また、網状体(3)の破損を防止できる。
【0018】
本発明の蓄冷材(1A)は、図2に示す様に、保冷容器(4)に野菜などの被冷却物(6)を収容した後、被冷却物(6)の上に載せて使用される。その場合、蓄冷材(1A)は、被冷却物(6)側に網状体(3)を向けて、すなわち、網状体(3)を下方に向けて保冷容器(4)に収容される。
【0019】
上記の様に蓄冷材(1A)を使用した場合、蓄冷材(1A)の容器(1)の盤面に設けられた網状体(3)は、容器(1)の盤面への被冷却物(6)の直接接触を防止すると共に、容器(1)の盤面と被冷却物(6)との間に空間部を構成する。そして、蓄冷材(1A)は、容器(1)の表側の盤面および上記の空間部(網状体(3)の各開口の内側の空間部)で発生する冷気により被冷却物(6)及び保冷容器(4)の内部を冷却する。
【0020】
換言すれば、本発明の蓄冷材(1A)は、その容器(1)の盤面への被冷却物(6)の直接接触を網状体(3)により防止できるため、被冷却物(6)の部分的な凍結、すなわち、冷凍障害を防止でき、そして、網状体(3)の開口(空間部)を通じて流下する冷気によって被冷却物(6)及び保冷容器(4)の内部を効率的に冷却することが出来る。
【0021】
因に、網状体(3)が設けられていない従来型の蓄冷材をほうれん草およびモヤシと共に図2に示す状態で保冷容器(4)に収容し、冷却実験を行ったところ、蓄冷材に接触したほうれん草およびモヤシの一部分に凍結が生じたのに対し、図1に示す構造の本発明の蓄冷材(1A)について同様の条件で冷却実験を行ったところ、ほうれん草およびモヤシに凍結の発生はなく、十分に冷却できることが確認された。
【0022】
【発明の効果】
以上説明した様に、本発明の蓄冷材によれば、その容器盤面への被冷却物の直接接触を網状体により防止できるため、被冷却物の冷凍障害を防止でき、そして、網状体の開口を通じて流下する冷気によって被冷却物および保冷容器の内部を効率的に冷却することが出来る。
【図面の簡単な説明】
【図1】本発明に係る蓄冷材の外形の一例を示す裏面側から視た斜視図である。
【図2】本発明に係る蓄冷材の使用方法を示す縦断面図である。
【符号の説明】
1 :容器
2 :切欠き部
3 :網状体
4 :保冷容器
5 :蓋
6 :被冷却物
1A:蓄冷材
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a cold storage material, specifically, a cold storage material to be stored in a cold storage container when transporting vegetables and the like at a low temperature, and to efficiently cool the object to be cooled and the inside of the cold storage container without causing a refrigeration failure. The present invention relates to a regenerative material that can be cooled to a low temperature.
[0002]
[Prior art]
For example, in the low-temperature transportation of vegetables in a high-temperature period and a warm period, in order to prevent deterioration of quality, cold storage materials are stored in a cold storage container together with vegetables for transportation. As is well known, the regenerator material is a simple coolant that is formed by enclosing a liquid material having a low melting point in a container and that can be repeatedly used by being frozen in a freezer or the like. In the above-mentioned low-temperature transportation of vegetables, the cold storage material is usually placed on top of vegetables in the cold storage container in consideration of the flow of cold air. Or thin resin sheets to prevent direct contact between cold storage material and vegetables.
[0003]
[Problems to be solved by the invention]
By the way, in the above-mentioned low-temperature transportation using a cold storage material, there is a situation in which the transportation cost cannot be reduced because it takes time and effort to put the material into a cool container together with the material cost required for cardboard and the like. Further, cardboard and the like once used must be disposed of as waste, which is not preferable from a social viewpoint. Therefore, in the low-temperature transportation as described above, a means that can effectively cool vegetables and the inside of a cold storage container without using cardboard or the like and without causing freezing trouble is desired.
[0004]
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a cold storage material to be stored in a cold storage container when transporting vegetables and the like at a low temperature, and to provide a cooling object and a cold storage without causing a freezing failure. An object of the present invention is to provide an improved regenerator material that can efficiently cool the inside of a container.
[0005]
[Means for Solving the Problems]
In order to solve the above problems, the cold storage material of the present invention is a cold storage material that is contained in a cold storage container together with an object to be cooled, and is formed by enclosing a liquid material in a flat container, and at least one of the containers. Is characterized in that a net-like body is provided on the board surface of.
[0006]
That is, in the cold storage material described above, the mesh provided on the board surface of the container prevents direct contact of the object to be cooled with the board surface of the container, and generates cold air between the board surface of the container and the object to be cooled. Make up the space.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of a cold storage material according to the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing an example of the outer shape of the cold storage material according to the present invention, as viewed from the back side. FIG. 2 is a longitudinal sectional view showing a method of using the cold storage material according to the present invention.
[0008]
The cold storage material of the present invention is indicated by reference numeral (1A) in the figure, and as shown in FIG. 2, is provided with a cold storage container (4) together with a cooled object (6) such as vegetables to be controlled at a low temperature in transportation and storage. ) To be used. The object to be cooled (6) to which the cold storage material (1A) of the present invention is applied includes an article whose quality is impaired by freezing, for example, vegetables such as spinach, lettuce, and bean sprouts which easily cause freezing failure.
[0009]
As the cold storage container (4) containing the object to be cooled (6) and the cold storage material (1A), an integrally molded container made of styrene foam having an internal volume of about 10 to 25 liters is usually used. Moreover, the cold storage container (4) may be a folding container configured such that the lower end edges of the four side walls are connected to the four sides of the bottom plate by hinges or hinges so that each side wall can be folded. Reference numeral (5) in FIG. 2 indicates a lid.
[0010]
As shown in FIG. 1, the cold storage material (1A) of the present invention is configured by enclosing water or an aqueous solution having a low melting point in a flat container (1). The container (1) of the cold storage material (1A) is made of a thermoplastic resin such as polyethylene, and can be accommodated in a clearance space in the cold storage container (4). It is formed in a flat shape so that cold air can be supplied.
[0011]
The board surface shape (flat surface shape) of the container (1) can be appropriately designed. However, the cold storage material (1A) illustrated in FIG. 1 has a substantially rectangular board surface shape and has a cutout on a long side thereof. This is configured using the container (1) provided with (2). The notch (2) is a handle for facilitating taking in and out of the cold storage container (4). Although not shown, the center of the panel surface of the container (1) is provided to improve handling. A hole for finger hooking may be provided.
[0012]
The container (1) can be manufactured by an extrusion blow molding method or by welding each member of the front side and the back side injection-molded to each. In the case of the illustrated cold storage material (1A), the length of one side of the board surface is about 10 to 35 cm and the thickness is about 1 to 3 cm for practical use. Is set to about 300 to 1500 cm 3 .
[0013]
The liquid substance sealed in the container (1) is generally a low-melting aqueous solution obtained by adding a gelling agent to water or an aqueous sodium chloride solution. The above liquid material is usually prepared in consideration of the cooling efficiency and the volume occupied in the cool container so that the melting point is about −20 to 0 ° C. and the latent heat of fusion is about 40 to 80 Kcal / kg. When applied to vegetables or the like to be controlled at a refrigeration temperature of not more than ℃, it is preferable that the preparation is made so that the melting point is about -5 to 0 ℃.
[0014]
In the cold storage material (1A) of the present invention, in order to prevent refrigeration failure due to contact with the object to be cooled (6) such as vegetables, a net-like material (3) as an interference material is provided on at least one board of the container (1). ) Is provided. The reticulated body (3) does not hinder the generation of cool air on the panel surface of the container (1), and when the cold storage material (1A) is stored in the cold storage container (4), the container (1) of the cold storage material is used. This is for separating the panel surface and the object to be cooled (6).
[0015]
As the net (3), a resin net or a grid-like molded body is used. One size of the opening of the mesh body (3) is 0.3~15cm 2, the thickness of preferably 2 to 10 cm 2, the mesh body (3) 1 to 15 mm, is preferably set to 2 to 5 mm. The reason why the size of the opening of the mesh body (3) is set in the above range is as follows. That is, when the opening of the mesh body (3) is smaller than 0.3 cm 2 , the board surface of the container (1) is in a closed state, so that the efficiency of generating cool air is deteriorated and the cooling capacity is lacking. On the other hand, when the opening of the mesh body (3) is larger than 15 cm 2 , the object to be cooled (6) may directly contact the panel surface of the container (1).
[0016]
The reason for setting the thickness of the mesh body (3) in the above range is as follows. That is, when the thickness of the mesh body (3) is less than 1 mm, a sufficient space cannot be secured between the surface of the container (1) and the object to be cooled (6), and the object to be cooled (6) is overcooled. ) May freeze. On the other hand, when the thickness of the net-like body (3) is 15 mm thick, the entire thickness of the cold storage material (1A) becomes large and the occupied volume in the cold storage container (4) increases, which is not practical.
[0017]
The reticulated body (3) may be attached to the board surface of the container (1) after the container (1) is formed, or may be attached to the container (1) by a mold structure when the container (1) is formed. They may be formed integrally. The cold storage material (1A) illustrated in FIG. 1 is obtained by attaching a grid-like net (3) to the board surface of a preformed container (1). Specifically, one board surface of the container (1) has a structure in which an outer peripheral portion is swelled and an inner portion other than the outer peripheral portion is recessed into a shallow dish shape, and the mesh body (3) has a shallow dish shape. Is fitted into the recessed part. As described above, when the mesh (3) is fitted into the recessed portion of the board surface of the container (1), the handleability can be improved and the mesh (3) can be prevented from being damaged.
[0018]
As shown in FIG. 2, the cold storage material (1A) of the present invention is used by placing a cooled object (6) such as vegetables in a cold storage container (4) and placing it on the cooled object (6). You. In this case, the cold storage material (1A) is stored in the cold storage container (4) with the mesh (3) facing the object to be cooled (6), that is, with the mesh (3) facing downward.
[0019]
When the cold storage material (1A) is used as described above, the mesh body (3) provided on the board surface of the container (1) of the cold storage material (1A) is used to cool the object (6) to the board surface of the container (1). ) Is prevented, and a space is formed between the panel surface of the container (1) and the object to be cooled (6). The cold storage material (1A) is cooled by the cool air generated in the front panel surface of the container (1) and the space (the space inside each opening of the mesh body (3)) and the cold storage material (6) and the cold insulator. The inside of the container (4) is cooled.
[0020]
In other words, the cold storage material (1A) of the present invention can prevent the cold object (6) from directly contacting the panel surface of the container (1) by the mesh body (3). Partial freezing, that is, freezing trouble can be prevented, and the object to be cooled (6) and the inside of the cold storage container (4) are efficiently cooled by cold air flowing down through the openings (spaces) of the mesh body (3). You can do it.
[0021]
Incidentally, the conventional cold storage material without the mesh body (3) was accommodated in the cold storage container (4) in the state shown in FIG. 2 together with spinach and bean sprouts, and a cooling experiment was performed. While a part of spinach and bean sprouts were frozen, a cooling experiment was performed on the cold storage material (1A) of the present invention having the structure shown in FIG. 1 under the same conditions. It was confirmed that sufficient cooling was possible.
[0022]
【The invention's effect】
As described above, according to the cold storage material of the present invention, direct contact of the object to be cooled to the container panel surface can be prevented by the mesh, so that freezing failure of the object to be cooled can be prevented, and the opening of the mesh can be prevented. The object to be cooled and the inside of the cold storage container can be efficiently cooled by the cool air flowing down through the cooling device.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an example of the outer shape of a cold storage material according to the present invention, as viewed from the back side.
FIG. 2 is a longitudinal sectional view showing a method of using the cold storage material according to the present invention.
[Explanation of symbols]
1: Container 2: Notch portion 3: Reticulated body 4: Cold storage container 5: Lid 6: Cooled object 1A: Cold storage material

Claims (3)

被冷却物と共に保冷容器に収容される蓄冷材であって、扁平な容器に液状物を封入して成り、かつ、前記容器の少なくとも一方の盤面に網状体が設けられていることを特徴とする蓄冷材。A cold storage material to be stored in a cold storage container together with an object to be cooled, wherein a liquid material is sealed in a flat container, and a net is provided on at least one panel surface of the container. Cool storage material. 容器の盤面が浅皿状に凹没した構造を備え、網状体が前記凹没部に嵌め込まれている請求項1に記載の蓄冷材。The cold storage material according to claim 1, wherein the cold storage material has a structure in which a board surface of the container is recessed in a shallow dish shape, and a mesh body is fitted in the recessed portion. 網状体の開口の大きさが0.3〜15cmであり、網状体の厚さが1〜15mmである請求項1又は2に記載の蓄冷材。The cold storage material according to claim 1, wherein the size of the opening of the mesh is 0.3 to 15 cm 2 , and the thickness of the mesh is 1 to 15 mm.
JP2003004790A 2003-01-10 2003-01-10 Cool storage material Pending JP2004218889A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008101115A (en) * 2006-10-19 2008-05-01 Jfe Engineering Kk Coolant and cold insulation material
CN102419043A (en) * 2011-12-05 2012-04-18 合肥美的荣事达电冰箱有限公司 Cold accumulation assembly, drawer assembly and refrigerator
WO2015163200A1 (en) * 2014-04-24 2015-10-29 シャープ株式会社 Method for producing heat storage member
CN108302853A (en) * 2018-02-02 2018-07-20 上海理工大学 A kind of Low Temperature Storage cold plate

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008101115A (en) * 2006-10-19 2008-05-01 Jfe Engineering Kk Coolant and cold insulation material
CN102419043A (en) * 2011-12-05 2012-04-18 合肥美的荣事达电冰箱有限公司 Cold accumulation assembly, drawer assembly and refrigerator
WO2015163200A1 (en) * 2014-04-24 2015-10-29 シャープ株式会社 Method for producing heat storage member
CN108302853A (en) * 2018-02-02 2018-07-20 上海理工大学 A kind of Low Temperature Storage cold plate

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