JP6033348B2 - Frozen car - Google Patents

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JP6033348B2
JP6033348B2 JP2015037204A JP2015037204A JP6033348B2 JP 6033348 B2 JP6033348 B2 JP 6033348B2 JP 2015037204 A JP2015037204 A JP 2015037204A JP 2015037204 A JP2015037204 A JP 2015037204A JP 6033348 B2 JP6033348 B2 JP 6033348B2
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freezer
side wall
sheet
graphite sheet
refrigerator
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JP2015099010A (en
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大木 武彦
武彦 大木
大木 達彦
達彦 大木
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Ohgi Technological Creation Co Ltd
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Description

本発明は、冷凍車に関する。 The present invention relates to a refrigerator vehicle.

一般に、冷凍車に取り付けられた冷凍庫は、側壁、天井、床、リア扉に断熱層を有しており、庫内の冷気が外部に逃げるのを阻止している。また、側壁又は天井の所定の箇所には、庫内に冷気を吹き出して庫内の温度を下げる冷凍機(エバポレータ)が設けられている。この冷凍車の冷凍庫は、側壁などの構造について、種々の提案がされている。例えば、特許文献1には、冷凍庫の側壁などを形成するパネル板を、2枚の複合板を相対向して配置し、それら複合板間に樹脂からなる芯材(断熱層)を密着させて挟み込んだ構成としたものが記載されている。この複合板は、例えばアルミニウム板などからなる表板と内板との間に、ポリエチレン樹脂などからなる断熱性の中間材を密着させて挟み込んだ構造のものである。このパネル板は、木材を用いていないので、それとの比較において、断熱性が向上して庫内を冷やすために使用される消費電力を削減でき、また、軽量さ、錆び難さ、強度の面でも良好であるとしている。   In general, a freezer attached to a freezer car has a heat insulating layer on a side wall, a ceiling, a floor, and a rear door, and prevents cold air inside the refrigerator from escaping to the outside. In addition, a refrigerator (evaporator) is provided at a predetermined location on the side wall or ceiling to blow cool air into the warehouse to lower the temperature in the warehouse. In the freezer of this freezer, various proposals have been made regarding structures such as side walls. For example, Patent Document 1 discloses that a panel plate that forms a side wall of a freezer is disposed with two composite plates facing each other, and a core material (heat insulating layer) made of resin is adhered between the composite plates. It describes what has been sandwiched. The composite plate has a structure in which a heat insulating intermediate material made of polyethylene resin or the like is sandwiched between a front plate made of, for example, an aluminum plate and an inner plate. Since this panel board does not use wood, compared with it, heat insulation is improved and power consumption used to cool the inside of the cabinet can be reduced. In addition, lightness, rust resistance, and strength are reduced. But it is said to be good.

特開2004−28434号公報JP 2004-28434 A

ところで、冷凍車では、庫内に荷物を積み込む際に、冷凍機から冷気を吹き出し始めるので、荷物が置かれるどの場所も一定温度以下に下がるまで待機するのが望ましい。その待機時間が長ければ、燃料を消費するのは勿論、効率的な運輸システムの運用にとって不都合である。しかしながら、庫内は冷気の対流に依存して場所による温度差が少なくないのが普通であり、特許文献1を含め従来の冷凍車の冷凍庫は、場所による温度差を少なくしつつ急速に庫内の温度を下げることは余り考慮されていない。   By the way, in a freezer car, when loading a load into a warehouse, cold air starts to be blown out from the refrigerator, so it is desirable to wait until the place where the load is placed falls below a certain temperature. If the waiting time is long, it consumes fuel and is inconvenient for efficient transportation system operation. However, it is normal that the temperature difference depending on the location is not small depending on the convection of the cold air, and the freezer of the conventional freezer including Patent Document 1 rapidly reduces the temperature difference depending on the location. Reducing the temperature is not considered much.

本発明は、係る事由に鑑みてなされたものであり、その目的は、場所による温度差を少なくしつつ急速に庫内の温度を下げることが可能な冷凍車を提供することにある。 This invention is made | formed in view of the reason which concerns, The objective is to provide the freezing vehicle which can reduce the temperature in a warehouse rapidly, reducing the temperature difference by a place.

上記目的を達成するために、請求項1に記載の冷凍車は、庫内に冷気を吹き出す冷凍機が設けられており、少なくとも側壁に金属層を介さずに熱拡散率が高い黒鉛シートが貼り付けられ、かつ、該黒鉛シートに金属シートが貼り付けられ、該金属シートが庫内に露出しており、庫内の冷気は、前記金属シートを介して前記黒鉛シートの熱を吸収し、該黒鉛シートにおける面方向の熱拡散によって周辺の温度を下げることを特徴とする。 In order to achieve the above-mentioned object, the refrigerator according to claim 1 is provided with a refrigerator that blows out cool air into the refrigerator, and a graphite sheet having a high thermal diffusivity is attached to at least a side wall without a metal layer. And a metal sheet is attached to the graphite sheet, the metal sheet is exposed in the cabinet, and the cool air in the cabinet absorbs heat of the graphite sheet through the metal sheet, The temperature around the graphite sheet is lowered by thermal diffusion in the surface direction.

本発明によれば、冷気の対流とともに側壁からも庫内の温度を下げるので、場所による温度差を少なくしつつ急速に庫内の温度を下げることができる。   According to the present invention, the temperature in the cabinet is lowered from the side wall as well as the convection of the cold air, so that the temperature in the cabinet can be rapidly lowered while reducing the temperature difference depending on the place.

本発明の実施形態に係る冷凍車の冷凍庫のリア扉を開いたときの外観図である。It is an external view when the rear door of the freezer of the freezer truck concerning the embodiment of the present invention is opened. 同上の冷凍庫の側壁又は天井の庫内側を示す模式的な拡大断面図である。It is a typical expanded sectional view which shows the side wall of the freezer same as the above, or the warehouse inner side of a ceiling. 同上の冷凍庫の実験結果を示すグラフである。It is a graph which shows the experimental result of the freezer same as the above.

以下、本発明を実施するための好ましい形態を説明する。本発明の実施形態に係る冷凍庫1は、冷凍車に取り付けられる冷凍庫である。この冷凍庫1は、従来と同様に、図1に示すように、側壁21(前側壁21a、左側壁21b、及び右側壁21c)、天井22、床23、リア扉24に、合成樹脂発泡材などの断熱層を有しており、庫内の冷気が外部に逃げるのを阻止している。また、この冷凍庫1は、従来と同様に、側壁21又は天井22の所定の箇所に、庫内に冷気を吹き出す冷凍機3が設けられており、これによって庫内の温度が下げられる。   Hereinafter, preferred embodiments for carrying out the present invention will be described. The freezer 1 which concerns on embodiment of this invention is a freezer attached to a freezer truck. As shown in FIG. 1, the freezer 1 has a side wall 21 (a front side wall 21a, a left side wall 21b, and a right side wall 21c), a ceiling 22, a floor 23, a rear door 24, a synthetic resin foam material, and the like. The heat insulation layer is prevented and the cool air in the cabinet is prevented from escaping to the outside. Moreover, this freezer 1 is provided with the refrigerator 3 which blows out cold air in the store | warehouse | chamber in the predetermined | prescribed location of the side wall 21 or the ceiling 22 like this, and the temperature in a store | warehouse | chamber is lowered | hung by this.

側壁21と天井22の庫内側には、図2に示すように、黒鉛シート4が貼り付けられている。また、その黒鉛シート4には金属シート5が貼り付けられており、庫内にはこの金属シート5が露出している。   As shown in FIG. 2, the graphite sheet 4 is attached to the inside of the side wall 21 and the ceiling 22. Moreover, the metal sheet 5 is affixed on the graphite sheet 4, and this metal sheet 5 is exposed in the warehouse.

黒鉛シート4は、膨張黒鉛シート(例えば、厚さが1mm程度)が好適に用いられる黒鉛製シートである。膨張黒鉛シートは、原料の天然黒鉛などの黒鉛を膨張させて膨張黒鉛の形態にしてから加圧してシート状に成形したものである。この黒鉛シート4は、黒鉛粒子同士が結合し合うために、黒鉛成分(炭素成分)の比率を極めて高く(例えば99%以上に)することができる。それにより、黒鉛シート4は、非常に軽量であり、化学的に安定しており、かつ、熱拡散率が高い。具体的には、熱拡散率は、例えば、面方向(厚さ方向と直交方向)が100〜200W/(m・K)程度である。   The graphite sheet 4 is a graphite sheet in which an expanded graphite sheet (for example, a thickness of about 1 mm) is preferably used. The expanded graphite sheet is obtained by expanding a graphite such as natural graphite as a raw material into a form of expanded graphite and then pressing it into a sheet shape. This graphite sheet 4 can make the ratio of the graphite component (carbon component) extremely high (for example, 99% or more) because the graphite particles are bonded to each other. Thereby, the graphite sheet 4 is very lightweight, is chemically stable, and has a high thermal diffusivity. Specifically, the thermal diffusivity is, for example, about 100 to 200 W / (m · K) in the plane direction (direction perpendicular to the thickness direction).

金属シート5は、アルミニウム(例えば、厚さが0.1〜0.2mm程度)製が好適に用いられる金属製シートである。黒鉛シート4は破断し易く、また、黒鉛の粉が生じ易いものであるが、金属シート5は、黒鉛シート4の破断に対する強度あるいは耐久性を向上させるとともに、黒鉛シート4からの黒鉛の粉が荷物に付着するのを防止することができる。金属シート5は、このような効果を奏すればよいので、通常、黒鉛シート4よりも薄い。金属シート5が薄いと、軽量化に有利である。   The metal sheet 5 is a metal sheet suitably made of aluminum (for example, having a thickness of about 0.1 to 0.2 mm). Although the graphite sheet 4 is easy to break and graphite powder is easily generated, the metal sheet 5 improves the strength or durability against breakage of the graphite sheet 4 and the graphite powder from the graphite sheet 4 is reduced. It can be prevented from adhering to the luggage. Since the metal sheet 5 should just have such an effect, it is usually thinner than the graphite sheet 4. A thin metal sheet 5 is advantageous for weight reduction.

このよう冷凍庫1では、冷凍機3から吹き出された冷気は、側壁21又は天井22に接触しながら庫内を対流する。この対流に当たった箇所では、そこが有していた熱が吸収されて温度が下がり、その近傍の空気の温度も段々下がって行く。側壁21又は天井22において吹き出された冷気に接触した部分では、その近傍の空気の温度が段々下がって行くとともに、金属シート5を介してその外側の黒鉛シート4の熱が吸収される。そして、黒鉛シート4における面方向の熱拡散によって急速に周辺の側壁21又は天井22の温度も下がって、更には、その近傍の空気の温度が段々下がって行く。こうして、冷気の対流だけではなく側壁21又は天井22からも庫内の温度を下げるので、場所による温度差を少なくしつつ急速に庫内の温度を下げることができる。   As described above, in the freezer 1, the cold air blown out from the refrigerator 3 convects the inside of the refrigerator while being in contact with the side wall 21 or the ceiling 22. At the location where this convection is encountered, the heat it has absorbed is absorbed and the temperature drops, and the temperature of the air in the vicinity thereof gradually decreases. In the portion in contact with the cold air blown out on the side wall 21 or the ceiling 22, the temperature of the air in the vicinity thereof gradually decreases, and the heat of the graphite sheet 4 outside the metal sheet 5 is absorbed. And the temperature of the surrounding side wall 21 or the ceiling 22 falls rapidly by the thermal diffusion of the surface direction in the graphite sheet 4, Furthermore, the temperature of the air of the vicinity falls gradually. Thus, since the temperature in the cabinet is lowered not only from the convection of the cold air but also from the side wall 21 or the ceiling 22, the temperature in the cabinet can be rapidly lowered while reducing the temperature difference depending on the place.

この冷凍庫1は、黒鉛シート4と金属シート5を貼り付けることによって既存の冷凍庫を流用して構成することもできる。この場合、すでに貼り合わせた黒鉛シート4と金属シート5を側壁21又は天井22に貼り付ければよい。黒鉛シート4と金属シート5は軽量であるので、それらは取り扱い易く、作業が容易になる。更には、冷凍庫1は、トラックの通常のコンテナを改造して構成することも可能である。この場合、冷凍機3を設置し、コンテナの内側に断熱層を設けて、黒鉛シート4と金属シート5を側壁21又は天井22に貼り付ければよい。この断熱層には、通気性のないものは勿論、通気性の有るものや、単にほぼ密封された状態の空気層を用いることができ、この場合、金属シート4は庫内と断熱層との間の空気の移動を阻止する役目もすることになる。   This freezer 1 can also be constituted by diverting an existing freezer by attaching a graphite sheet 4 and a metal sheet 5. In this case, the graphite sheet 4 and the metal sheet 5 that have already been bonded together may be bonded to the side wall 21 or the ceiling 22. Since the graphite sheet 4 and the metal sheet 5 are lightweight, they are easy to handle and work. Furthermore, the freezer 1 can be configured by modifying a normal container of a truck. In this case, the refrigerator 3 is installed, a heat insulating layer is provided inside the container, and the graphite sheet 4 and the metal sheet 5 may be attached to the side wall 21 or the ceiling 22. As this heat insulating layer, a non-breathable one can be used as well as a breathable one or a substantially sealed air layer. In this case, the metal sheet 4 is formed between the inside and the heat insulating layer. It also serves to prevent air movement between them.

図3は、左側壁21b、右側壁21c、天井22、リア扉24の全面に黒鉛シート4と金属シート5を貼り付けた冷凍庫1(曲線a)と、比較例としてその黒鉛シート4と金属シート5を貼り付ける前の状態の冷凍庫(曲線b)を比較したものであって、冷凍機3を稼働させてからの温度の変化を示すものである。冷凍庫1の庫内の大きさは、約1.8m×1.8m×4.1mである。曲線a、bはともに、左側壁21bにおいて前側壁21a及び床23とで形成する角部の近傍箇所(図1中のA)と、右側壁21cにおいて前側壁21a及び床23とで形成する角部の近傍箇所(図1中のB)の温度の平均を取ったものである。これらの箇所は、冷凍機3から吹き出された冷気が対流して届くのが最も遠いので、庫内において通常、温度が最も下がり難い箇所である。   FIG. 3 shows a freezer 1 (curve a) in which a graphite sheet 4 and a metal sheet 5 are attached to the entire left side wall 21b, right side wall 21c, ceiling 22, and rear door 24, and the graphite sheet 4 and metal sheet as a comparative example. 5 is a comparison of the freezer (curve b) in a state before pasting 5 and shows a change in temperature after the refrigerator 3 is operated. The size of the freezer 1 is about 1.8 m × 1.8 m × 4.1 m. Curves a and b are both corners formed by the front side wall 21a and the floor 23 in the left side wall 21b and the corners formed by the front side wall 21a and the floor 23 in the right side wall 21c. This is the average of the temperatures in the vicinity of the part (B in FIG. 1). These places are the places where the cold air blown out from the refrigerator 3 reaches the farthest, so that the temperature is usually the lowest in the cabinet.

図3より、180分経過すると、曲線aは約−12℃に到達しているが、曲線bは約−7℃である。これより、温度が下がり難い箇所において、黒鉛シート4と金属シート5を貼り付けた冷凍庫1は、それらを貼り付ける前の状態の冷凍庫よりも急速に温度が下がっていることが分かる。よって、冷凍庫1では、場所による温度差を少なくしつつ急速に庫内の温度を下げることができる。   From FIG. 3, after 180 minutes, the curve a reaches about −12 ° C., but the curve b is about −7 ° C. From this, it can be seen that the temperature of the freezer 1 to which the graphite sheet 4 and the metal sheet 5 are pasted is lowered more rapidly than the freezer in a state before they are pasted at a place where the temperature is difficult to fall. Therefore, in the freezer 1, the temperature in the refrigerator can be rapidly lowered while reducing the temperature difference depending on the place.

以上、本発明の実施形態に係る冷凍庫について説明したが、本発明は、上述の実施形態に記載したものに限られることなく、特許請求の範囲に記載した事項の範囲内でのさまざまな設計変更が可能である。例えば、黒鉛シート4と金属シート5は、側壁21と天井22とリア扉24の全部に貼り付けることも可能であり、また、逆に、場合に応じて、天井22やリア扉24では省略したり、側壁21の一部で省略したりすることも可能である。   As mentioned above, although the freezer which concerns on embodiment of this invention was demonstrated, this invention is not restricted to what was described in the above-mentioned embodiment, Various design changes within the range of the matter described in the claim Is possible. For example, the graphite sheet 4 and the metal sheet 5 can be attached to all of the side wall 21, the ceiling 22, and the rear door 24, and conversely, depending on circumstances, the graphite sheet 4 and the metal sheet 5 may be omitted from the ceiling 22 and the rear door 24. It is also possible to omit a part of the side wall 21.

また、側壁21又は天井22において、荷物或いは人に接触しないような部分などでは、金属シート5を省略して、黒鉛シート4が庫内に露出しているようにすることも可能である。   Further, the metal sheet 5 may be omitted at the side wall 21 or the ceiling 22 where it does not come into contact with luggage or people, and the graphite sheet 4 may be exposed in the cabinet.

また、冷凍機3によって庫内の温度が下げられる冷凍庫ならば、冷凍車以外の用途にも適用可能である。   Moreover, if it is a freezer in which the temperature in a store | warehouse | chamber is lowered | hung with the refrigerator 3, it is applicable also to uses other than a freezing vehicle.

1 冷凍庫
21 側壁
22 天井
3 冷凍機
4 黒鉛シート
5 金属シート
1 Freezer 21 Side Wall 22 Ceiling 3 Refrigerator 4 Graphite Sheet 5 Metal Sheet

Claims (1)

庫内に冷気を吹き出す冷凍機が設けられており、
少なくとも側壁に金属層を介さずに熱拡散率が高い黒鉛シートが貼り付けられ、かつ、該黒鉛シートに金属シートが貼り付けられ、該金属シートが庫内に露出しており、
庫内の冷気は、前記金属シートを介して前記黒鉛シートの熱を吸収し、該黒鉛シートにおける面方向の熱拡散によって周辺の温度を下げることを特徴とする冷凍車
There is a refrigerator that blows out cold air in the cabinet,
A graphite sheet having a high thermal diffusivity is attached to at least the side wall without a metal layer, and a metal sheet is attached to the graphite sheet, and the metal sheet is exposed in the cabinet,
Cool air in the refrigerator, the metal via the sheet to absorb heat from the graphite sheet, refrigerator car, characterized in that lowering the temperature around the thermal diffusion in the plane direction of the graphite sheet.
JP2015037204A 2015-02-26 2015-02-26 Frozen car Active JP6033348B2 (en)

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JP2004028434A (en) * 2002-06-25 2004-01-29 Isuzu Motors Ltd Paneling
KR200320685Y1 (en) * 2003-05-01 2003-07-22 (주)아이에스디지털 Makeup refrigerator having inside cooker of carbon molding panel
JP2005210035A (en) * 2004-01-26 2005-08-04 Otsuka Denki Kk Graphite composite material
JP4069079B2 (en) * 2004-01-08 2008-03-26 ダウ化工株式会社 Refrigerated or cold car storage
JP2007168550A (en) * 2005-12-21 2007-07-05 Toyota Auto Body Co Ltd Outer wall structure of vehicle
JP2009099878A (en) * 2007-10-19 2009-05-07 Hitachi Ltd Heat sink and its manufacturing method
JP5194232B2 (en) * 2007-11-07 2013-05-08 北川工業株式会社 Thermally conductive material and method for producing the same
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