JP2009137367A - Refrigerated car capable of suppressing generation of dew condensation in container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a refrigerated car capable of eliminating haze generated in a container in a short time and preventing breakage of a packaging container and degradation of a product caused by water content condensed in the container by attaching an aluminum porous plate with very high water-absorbing property in the container. <P>SOLUTION: An aluminum porous body is provided in the container of the refrigerated car, which is formed by pressing aluminum particles which are pulverized by a mechanical means having the average grain diameter being ≤200 μm and their surfaces being non-smooth with a pressure of 30-60 kg/cm<SP>2</SP>in a softening temperature range. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a refrigerated transport vehicle having a structure for preventing generation of haze and condensation that occurs when a container door is opened. In particular, the present invention relates to the occurrence of soot produced by mixing cold and warm air when the container door is opened in an ultra-refrigerated transport vehicle in which the temperature inside the container is required to be maintained at a lower temperature than that of a normal refrigerated transport vehicle. The present invention relates to a refrigerated transport vehicle that can instantaneously remove the mist and prevent destruction of the packaging container and product deterioration due to condensation.

When loading and unloading a refrigerated transport vehicle, outside warm air flows into the container, and the cool air inside the container and the outside warm air mix together, and the inside of the container becomes haze and becomes opaque. Such wrinkles generated in the container are not resolved in a short time, the visibility is poor and the loading / unloading of the cargo is inconvenient. Cause damage or destruction. In order to prevent the packaging container from being damaged due to condensation in the container of the refrigerated transport vehicle, a method using a condensed water absorbing sheet for a cargo storage room having the same size as the ceiling of the container (Patent Document 1), A method of covering the lower frame of the refrigerator mounted close to the ceiling with a heat insulating material such as an absorbent non-woven fabric (Patent Document 2) or urethane foam (Patent Document 3). A method of providing a working chamber for temporarily storing collected cargo to reduce outside air entry into the freezer compartment (Patent Document 4), or when the door of the freezer compartment is opened, the blower is operated to move upward from below the open portion. Various improvement methods such as a method of forming an air curtain by a flowing external airflow (Patent Document 5) have been known before this application.
Utility Model Registration No. 3079737 JP 2003-121044 A Japanese Utility Model Publication No. 06-53292 Japanese Patent Laid-Open No. 2002-2366 Japanese Patent Laid-Open No. 11-21309

  However, conventionally known methods for preventing damage to the packaging container due to condensation in the container of the refrigerated transport vehicle and deterioration of the product itself require that a condensed water absorbing sheet be set in the container in advance, It is only to suppress the fall of the dew condensation water in the lower frame of the container, and when loading and unloading the refrigerated transport vehicle, the outside warm air flows into the container and mixes with the cold air to cause condensation and cause condensation in the container. It was not possible to sufficiently prevent damage to packaging containers such as corrugated cardboard because the surface of the load became wet with condensed water. The present invention can instantly remove the soot generated in the container and prevent condensation even when the door of the container held at about minus 20 ° C., which is called a refrigerated transport vehicle, particularly a super refrigerated transport vehicle, is opened. A refrigerated transport vehicle having a container is provided.

In order to solve the above-mentioned problems, the present invention firstly provides a frozen body provided with an aluminum porous body made of aluminum fine particles having an average particle diameter of 200 μm or less and non-smooth surface, which is pulverized by mechanical means in a container. Provide transport vehicles.
Second, there is provided a refrigerated transport vehicle provided with an aluminum porous body made of aluminum fine particles having an average particle diameter of 100 μm or less and having a non-smooth surface pulverized by mechanical means in a container.
Thirdly, the present invention provides a refrigerated transport vehicle in which a porous aluminum body whose surface has a higher density than the core is used in the container.
Fourth, a refrigerated transport vehicle is provided in which a rectangular or rectangular aluminum porous body having a side length of 10 to 30 cm is provided in a container at intervals.
Fifth, a refrigerated transport vehicle is provided in which the distance between the porous aluminum bodies provided in the container becomes denser toward the rear.
Sixth, a refrigerated transport vehicle in which the bottom surface of the support member on the top surface of the container is inclined with respect to the horizontal direction is provided.

According to the invention of the first refrigerated transport vehicle, it is possible to prevent the generation of haze in the container which deteriorates the visibility even when the door of the low temperature container is opened, and the destruction of the packaging container and the product deterioration. It is possible to suppress the occurrence of condensate.
According to the invention of the second refrigerated transport vehicle, the generation of soot can be more effectively prevented and the occurrence of condensation in the container can be suppressed.
According to the invention of the third refrigerated transport vehicle, an aluminum porous body having high strength can be used in addition to the above effects.
According to the invention of the fourth refrigerated transport vehicle, it is possible to provide a refrigerated transport vehicle having an inexpensive and effective water absorption mechanism by providing the aluminum porous body at intervals.
According to the fifth refrigerated transport vehicle of the present invention, condensed water can be effectively absorbed by providing the aluminum porous plate densely at the rear of the container into which warm air flows.
According to the sixth refrigerated transport vehicle invention, the water absorbed by the porous aluminum body can be effectively drained by inclining the bottom surface of the support holding the porous aluminum body provided on the upper surface of the container with respect to the horizontal direction. .

The present invention eliminates the haze generated in the container in a short time by mounting a highly hygroscopic aluminum perforated plate in the container of the refrigerated transport vehicle and at the same time removes the packaging container due to moisture condensed in the container. The purpose is to prevent destruction and deterioration of the product. A highly hygroscopic aluminum perforated plate used in the present invention and its manufacturing method is a method in which aluminum fine particles having a non-smooth surface formed by a crushing method such as a crushing method and having a particle size of 200 μm or less, particularly a particle size of 100 μm or less are made of gold. It is molded by pressing at 30-60 kg / cm ² for 20 seconds to 120 seconds while heating to 550 to 650 ° C. which is a temperature range in which the aluminum fine particles are softened. A patent application has already been filed by the present applicant (Japanese Patent Application No. 2007-223804).

また、本願発明のアルミニウム多孔体は吸水量が大きいだけでなく表２に示されているように吸水速度が極めて早いという物性を有している。

本願発明はこの超高能率の吸水性を示すアルミニウム多孔体を冷凍輸送車のコンテナーの内部に取り付けることによりコンテナー内部を除湿するものであるが、本願発明のアルミニウム多孔体が設けられたコンテナーは吸水性が早くて吸水量が多いというだけでなく従来の吸水シートの様に製品を積み込む度に吸水性シートを設ける必要はないという点でも優れた特徴を有している。
本願発明の詳細を図１〜図４を用いてさらに詳細に説明する。 Since the aluminum porous body formed by such a specified method is pressurized at a softening temperature lower than the melting temperature, aluminum is a porous body having a structure formed of needle-like single crystals called whiskers, and the aluminum porous body Not only has a high strength, but also shows a large water absorption as compared with those formed using aluminum fine particles obtained by a thermal spraying method as shown in Table 1.

In addition, the aluminum porous body of the present invention has not only a large amount of water absorption but also has a property that the water absorption speed is extremely fast as shown in Table 2.

The present invention dehumidifies the inside of the container by attaching the aluminum porous body exhibiting ultra-high efficiency water absorption inside the container of the refrigerated transport vehicle, but the container provided with the aluminum porous body of the present invention is water-absorbing. It has an excellent feature not only in that it is fast and has a large amount of water absorption but also in that it is not necessary to provide a water-absorbing sheet every time a product is loaded as in the case of a conventional water-absorbing sheet.
Details of the present invention will be described in more detail with reference to FIGS.

  FIG. 1 schematically shows a cross-sectional view of an aluminum porous body (1) used in the present invention. As can be seen from FIG. 1, in the aluminum porous body (1), the pressure of the surface layer becomes higher than that of the core portion during molding, so that the density of the surface layer (2) is higher than the density of the core portion (3). Since the aluminum porous body (1) of the present invention is an aluminum porous body formed by pressurizing non-smooth aluminum fine particles crushed by mechanical means at a softening temperature, the crystal structure is maintained and the porosity is high. Water absorption is extremely high. The present invention uses an aluminum porous body (1) obtained by molding the specific aluminum fine particles under specific conditions. FIG. 2 is a perspective view showing an embodiment of the present invention in which a long aluminum porous body is provided inside the container. In FIG. 2, the container (4) is shown so that the internal structure of the container (4) can be clearly understood. The surrounding walls have been removed.

  A support (5) for supporting the aluminum porous body (1) is provided on the inner wall of the container (4), and the aluminum porous body (1) is locked by the support (5). In FIG. 2, the porous aluminum body (1) is locked only on one side of the container (4) so that the aspect in which the porous aluminum body (1) is provided in the container (4) can be clearly seen. A state in which only the support (5) is provided is shown on the side surface of. In FIG. 2, a long aluminum porous body (1) is shown. However, even if the aluminum porous body (1) is not formed by one long body, several pieces are joined together to form a long body. It may be formed. FIG. 3 is an enlarged view of the support (5) for supporting the porous aluminum body (1) on the side surface of the container (4), and is attached to the container (4) with an appropriate fixing tool (9) such as a bolt. The porous aluminum body (1) can be provided with a support (6) not only on the side surface of the container (4) but also on the upper surface of the container (4) as shown in FIG. FIG. 4 is an enlarged view of the support (6) that supports the porous aluminum body (1) provided on the upper surface of the container (4).

The support (6) provided on the upper surface of the container (4) has a V-shaped cross section. The support (6) having a V-shaped cross section is loaded with the porous aluminum body (1) to hold the porous aluminum body (1) and is provided with a notch (7) on one side or both sides. The porous aluminum body (1) absorbs moisture inside the container (4). In addition, the bottom of the V-shaped cross section shown in (8) of FIG. 4 uses the wind pressure from the cold air blower (10) so that the absorbed moisture does not fall, and is discharged to the rear of the container (4) through an appropriate outlet. To do.
Thus, the water | moisture content inside a container (4) is removed rapidly by arrange | positioning the aluminum porous body (1) supported by the support tool (5) at a suitable space | interval. In the present invention, it is preferable not to provide the aluminum porous body (1) at an appropriate interval, but to provide a close interval between the rear portion of the container (4), that is, a portion where the so-called door is opened and closed. Needless to say.

In the present invention, the porous aluminum body having good water absorption is provided inside the container of the refrigerated transport vehicle as described above, but the number and size of the aluminum porous body to be provided can be selected as appropriate. Needless to say, if the ratio of the area of the aluminum porous body in the interior increases, the effect of water absorption increases. However, in consideration of the cost of the aluminum porous body, the area of the aluminum porous body in the inner wall of the container is 20 ~ 60% is considered appropriate from the standpoint of effectiveness. The shape of the porous aluminum body is preferably a rectangular shape having a height of about 1 to 3 m and a width of about 10 to 30 cm, which is almost the same height as the container. Of course, when the length of the porous aluminum body is less than the length of the side surface of the container, the separately cut pieces are connected to make the length corresponding to the height of the side surface of the container. It is practical to provide this rectangular aluminum porous body on the side surface and upper surface of the container so as to have an area of 1/3 to 1/2 of the area of the container.
Below, the water absorption speed of a refrigerated transport vehicle that does not have a special dehumidifying mechanism in a container that is normally used compared to the present invention in which an aluminum porous body of 1/3 in area is provided on the top and side surfaces of the container is compared. Then it becomes as follows.

表３に示されているように本願発明の特殊な方法で成形したアルミニウム多孔体が設けられた冷凍輸送車は極めて良好な吸水性を示すことが示されている。 The aluminum material is pulverized by a crushing method to form fine particles having a particle size of 200 μm or less and 100 μm or less. Aluminum fine particles formed into fine particles of 100 μm or less and 200 μm or less are uniformly filled in a mold having a molding area of 918 mm × 1829 mm, respectively, and the surface temperature of the aluminum fine particles in the mold is set to about 600 ° C. using an infrared heating device. To heat for about 50 seconds. With the surface of the aluminum fine particles softened, the aluminum porous body having a thickness of 2 mm is formed by pressing with a pressure of 1000 tons (metric tons). This aluminum porous body was cut into a rectangle having a length of 1800 mm and a width of 100 mm to form an aluminum porous body. After opening the container door held at −20 ° C. for 10 minutes for the refrigerated transport vehicle and the normal refrigerated transport vehicle in which the molded aluminum porous body is provided on the side and top surfaces of the container so that the area becomes 1/3, the door is opened. Table 3 shows the time required to close and eliminate the haze.

As shown in Table 3, it is shown that the refrigerated transport vehicle provided with the porous aluminum body formed by the special method of the present invention exhibits extremely good water absorption.

It is sectional drawing of the aluminum porous body of this invention. It is the schematic diagram which provided the aluminum porous body in the container. This is a porous aluminum support provided on the side of the container. A porous aluminum support provided on the upper surface of the container.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Aluminum porous body 2 Surface layer of aluminum porous body 3 Core part of aluminum porous body 4 Container 5 Side surface support body of aluminum porous body 6 Upper surface support body of aluminum porous body 7 Notch part of upper surface support body 8 Bottom part of upper surface support body 9 Fixing 10 Cold air blower

Claims (6)

An aluminum porous body formed by pressing aluminum fine particles having an average particle diameter of 200 μm or less and having a non-smooth surface crushed by mechanical means at a softening temperature at a pressure of 30 to 60 kg / cm ² is placed inside the container. A refrigerated transport vehicle characterized by being provided.   2. The refrigerated transport vehicle according to claim 1, wherein the aluminum porous body is formed by using aluminum fine particles having an average particle diameter of 100 [mu] m or less, which are pulverized by mechanical means.   The refrigerated transport vehicle according to claim 1 or 2, wherein an aluminum porous body having a surface density larger than the core density is used.   The refrigerated transport vehicle according to any one of claims 1 to 3, wherein a rectangular or rectangular aluminum porous body having a side length of 10 to 30 cm is provided inside the container at an interval.   The refrigerated transport vehicle according to any one of claims 1 to 4, wherein the distance between the porous aluminum bodies provided on the side surfaces of the container becomes closer toward the rear. The refrigerated transport vehicle according to any one of claims 1 to 5, wherein the bottom surface of the holding member for holding the porous aluminum body provided on the upper surface of the container is inclined with respect to the horizontal direction.

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