JPH065575Y2 - Cooler with cool storage material for cool box - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a cooler containing a cold storage material for a cool box used for transporting frozen and refrigerated products.

(Prior art and its problems) Conventionally, a cold-storage container (cold roll box) for transporting refrigerated and refrigerated goods, which is equipped with a refrigerator and a cooler containing a cold storage material, has been known, but in order to maintain a low temperature for a long time, It is desired to further increase the cold storage capacity of the cooler.

The applicant of the present application has filed application No. 63-99331 for such a cooler. In this prior application, a large amount of regenerator material is enclosed in the cooler to increase the regenerator capacity, but since the inner heat exchange pipe and the regenerator material are in direct contact, the inner heat exchange pipe does not corrode. It is necessary to use expensive materials with strong corrosion resistance and to apply special surface treatments.

In addition, there is also known JP-B-63-137263 in which the internal heat exchange pipe is covered with a resin film, but since the resin film is interposed between the internal heat exchange pipe and the regenerator material, heat transfer efficiency is improved. bad.

Further, a pair of regenerator-containing containers, which are separably surface-joined, and grooves facing each other are provided on the respective surfaces to be surface-joined, and a heat exchange pipe is inserted through a through-hole formed by the grooves. Sho 63-142671 is also known, but since the through hole is formed by the groove part of the abutting part of the separable container, grease cannot be filled, and the space between the through hole and the heat exchange pipe cannot be filled. It is difficult to maintain the airtightness of the. Therefore, it is necessary to manufacture a precise mold, which increases the cost.

(Object of the Invention) An object of the present invention is to provide a cooler containing a cold storage material for a cool box, which can prevent corrosion of the internal heat exchange pipe while improving the cold storage capacity and heat transfer efficiency.

(Structure of the Invention) (1) Technical Means The present invention according to claim 1 is a cooler containing a regenerator material provided in an upper part of a cold insulation box having a refrigerator, and a hollow outer box which is a metal integrally molded product. The external box includes a fin integrally extending from an outer surface of the outer box, a regenerator material stored in a hollow interior of the outer box, and a metal internal heat exchange pipe thermally coupled to the regenerator material. Is integrally provided with a gutter having a U-shaped cross section that opens upward from the lower end thereof and a partition part that divides the inside of the outer box into two parts. A tubular portion and a thin plate portion that connects the tubular portions and divides the inside of the outer box into two parts are integrally provided, and the internal heat exchange pipe is fitted into the through hole of the tubular portion and With a regenerator material for a cool box characterized by filling the gap between It is 却器.

According to a second aspect of the present invention, in a cooler containing a regenerator material provided in an upper part of a cold insulation box having a refrigerator, a hollow outer casing made of metal, fins integrally extending from an outer surface of the outer casing, and the outer casing are provided. Of the cold storage material and a metal internal heat exchange pipe that is thermally connected to the cold storage material, and the outer box is a pair of hollow interiors that are integrally abutted against each other. Each of the mold members has a U-shaped trough that opens upward from the lower end thereof, an inner surface that defines a space in which the internal heat exchange pipe is piped at the abutting portion, and an inner surface. Providing integrally with a plurality of hook-shaped ribs that protrude and form a pair with the rib of the other mold member, and the shape of the rib is abutted against the inner surface of the other mold member at the time of abutting for plastic deformation, Internal heat in surface contact with the corresponding ribs on the mold A conversion pipe clamping a regenerator material containing cooler for cold storage box, characterized in that between and filled with thermally conductive grease into the gap between the rib and the internal heat exchange pipe between the rib and the inner surface.

(2) Action According to the invention of the first aspect of the present invention, the tubular portion forming the partition portion holds the internal heat exchange pipe and prevents the regenerator material from directly contacting the internal heat exchange pipe. Furthermore, the heat transfer grease maintains the airtightness between the outer peripheral surface of the metal internal heat exchange pipe and the through hole and transfers the cold heat from the metal internal heat exchange pipe from the metal partition to the regenerator material. .

According to the second aspect of the present invention, the rib of the mold material forming the outer box holds the internal heat exchange pipe and prevents the regenerator material from directly contacting the internal heat exchange pipe. Further, the metal ribs are plastically deformed at the time of abutment to hold the metal internal heat exchange pipes in a surface contact state. Moreover, the heat conductive grease maintains airtightness between the metal ribs and the outer peripheral surface of the metal inner heat exchange pipe, and between the ribs and the inner surface of the mold material, and at the same time, the heat conductive grease is removed from the metal inner heat exchange pipe. The cold heat of is transferred from the ribs made of metal and the wall portion forming the inner surface of the mold material to the cool storage material.

(First Embodiment) In FIGS. 1 to 6 showing the first embodiment, FIG. 1 is a front view of a cold insulation box adopting the present invention, and FIG. 2 is a view (II) of FIG. FIG. 3 is a cross-sectional view of the cooler outer box of the present invention, FIG. 4 is a front view of a cooler adopting the cooler outer box of FIG. 3, and FIG. , FIG. 6 is of FIG.
(VI) It is an arrow view.

In FIGS. 1 and 2 showing a cold insulation box (cold roll box) adopting the present invention, 10 is a box-shaped main body. An opening / closing door 11 is provided on the entire surface of the main body 10,
Inside is a cold room 12. A refrigerator 13 is provided in the lower portion of the main body 10 and can be conveyed by casters 14. A cooler 15 is provided above the cold storage chamber 12. The cooler 15 is provided with, for example, six cooler outer boxes 16 described below (only two are shown in FIG. 1). And each cooler outer box 16 is thermally connected by the internal heat exchange pipe 17 made of copper through which the refrigerant of the refrigerator 13 passes.

As shown in FIG. 3, the outer casing 16 of the cooler is a hollow integrally formed product made of aluminum, and the inside thereof is divided into left and right portions by a partition portion 18.
Has been divided. And the partition part 18 partitions the inside of the cooler outer case 16, and the cold storage material 21 is stored in this internal space. The cold storage material 21 is a highly corrosive inorganic salt such as calcium chloride or phosphate.

The partition portion 18 is, for example, four thin-walled cylindrical tubular portions 19
And a thin plate portion 20 that connects the cylindrical portions 19 in parallel. The tubular portions 19 are respectively in the front-rear direction of the cooler outer casing 16 (direction perpendicular to the paper surface of FIG. 3).
A through hole 22 extending to the inside is formed, and the internal heat exchange pipe 17 is fitted into the through hole 22. Through hole 22
Between the internal heat exchange pipe 17 and the heat transfer grease 23
(On the right side in FIG. 3) is filled with this heat transfer grease 23 and the outer peripheral surface of the internal heat exchange pipe 17 and the through hole 22.
The airtightness is maintained, and the cold heat from the internal heat exchange pipe 17 is more easily conducted from the tubular portion 19 to the regenerator material 21.

On both sides of the outer peripheral surface of the cooler outer casing 16, fins 24 inclined obliquely downward are integrally formed. Further, the lower part of the cooler outer casing 16 is recessed in an inverted V shape, and a gutter 25 is integrally formed at both lower ends thereof. The gutter 25 is formed in a shallow U-shaped cross section that opens upward, and the fin 2
It protrudes to the outside longer than 4. This makes fin 2
The water drops on the surface of No. 4 are received by the gutter 25, and the gutter 2
It is discharged to the outside by a pipe (not shown) connected to 5. Further, a heat insulating material 25a is attached to the lower surface of each gutter 25 to prevent dew condensation.

As shown in FIGS. 4 to 6, each cooler outer box 16
Are arranged in parallel with a space 26 therebetween and are connected by a bottom plate 27 and a side plate 28 made of aluminum, and one end portion of the cooler outer casing 16 is continuous with the side plate 28.

The internal heat exchange pipe 17 is formed in a U shape, is arranged in a space defined by the bottom plate 27 and the side plate 28, and a part of the internal heat exchange pipe 17 is fitted into the through hole 22 (FIG. 3) described above. .

In FIG. 4, reference numerals 30 to 33 are connecting pipes, which are joints of the internal heat exchange pipe 17 fitted in the through holes 22 (FIG. 3).

These connecting pipes 30 to 33 are connected to respective ends of the U-shaped internal heat exchange pipe 17 via spacer pipes (not shown), and their joints are brazed.

In FIG. 5, reference numeral 29 is an inlet for the cold storage material 21.

Further, in FIG. 6, reference numeral 10a is a cold storage chamber 12 (see FIGS. 1 and 2).
The side surface of the drawing), and the reference numeral 10b is a ceiling.

In the above configuration, when the cooler 15 stores the cold, the refrigerant cooled by the refrigerator 13 of FIG.
7, and this cold heat is conducted from the internal heat exchange pipe 17 to the regenerator material 21 via the heat transfer grease 23 and the tubular portion 19 shown on the right side in FIG. As a result, the cold storage material 21 freezes and stores cold, and the cold storage chamber 12 (FIGS. 1 and 2) is cooled by the cool air coming from the cold storage material 21 even in a place where the refrigerator 13 has no power supply.

According to the first embodiment, the partition 18 prevents the regenerator material 21 from coming into direct contact with the internal heat exchange pipe 17, so that a highly corrosive inorganic salt such as calcium chloride or phosphate is adopted as the regenerator material 21. However, the internal heat exchange pipe 17 can be prevented from corroding.

Further, the heat transfer grease 23 maintains the airtightness between the outer peripheral surface of the internal heat exchange pipe 17 and the through hole 22, and cools the internal heat exchange pipe 17 from the partition 18 to the cold storage material 2.
Therefore, even if there is a slight gap between the outer peripheral surface of the internal heat exchange pipe 17 and the through hole 22 when the respective parts are machined, high airtightness can be obtained by filling the heat transfer grease 23 when the assembly is completed. It is possible to transfer cold heat to the cold storage material 21 while holding the. Therefore, although the tolerance of the dimensional error of the cooler outer casing 16 is increased, the heat transfer efficiency is improved.

Further, according to the first embodiment, the fins 24 on the side wall of the cooler outer casing 16 are inclined obliquely downward, and a space 26 (FIGS. 4 and 5) is provided on both the left and right sides of the adjacent cooler outer casing 16. Are separated from each other, so that the cool air cooled by the fins 24 has an interval of 2
It flows downward through 6 to cool the inside of the cold insulation chamber 12 uniformly and efficiently.

Moreover, since the gutters 25 projecting longer than the fins 24 are integrally formed at both lower end portions of the cooler outer casing 16, water droplets condensed on the surfaces of the fins 24 are received by the gutters 25. It can be discharged to the outside by a pipe (not shown) connected to the gutter 25.

Further, in this embodiment, the heat insulating material 25 is provided on the lower surface of the gutter 25.
Since a is attached, dew does not form on the surface of the gutter 25.

(Second Embodiment) The cooler outer casing 40 shown in FIGS. 7 to 8 is formed by combining two hollow aluminum mold members 41 and 42. The mold members 41 and 42 are symmetrical so that they can be formed by the same mold. The cool storage material 21 is stored in the internal space of each of the mold members 41 and 42.

If the upper side of FIG. 7 is assumed to be the upper side, each mold member 41, 42
Has a pair of abutting portions 43 to 46 formed on the upper and lower ends thereof in close contact with each other, and the upper and lower joint portions of both mold members 41 and 42 are integrally connected by welding. Further, the fins 4 extending substantially horizontally from the outer surface of each of the mold members 41, 42.
1a and 42a are integrally formed.

One abutting portion 43, 45 of each pair is provided with convex portions 43a, 45a that project smoothly to the left and right (right side and left side in FIG. 7) to facilitate positioning, and the other abutting portion Four
4, 46 are provided with concave portions 44a, 46a which are in close contact with the corresponding convex portions 43a, 45a.

For example, four pairs of ribs 49 are provided on the inner surfaces 47 and 48 that define the space between the abutting portions 43 and 44 of each pair and the abutting portions 45 and 46.
To 56 are integrally formed.

The ribs 49 to 56 face each other in a vertically opposed manner, and each facing surface is curved in a hook shape having an arc surface so as to sandwich the internal heat exchange pipe 17 made of copper. Therefore, at the time of assembly, as shown by the arrow A in FIG. 8, the abutting portions 43 to 46 of the respective mold members 41 and 42 are abutted against each other, and the internal heat exchange pipe 17 is sandwiched between the ribs 49 to 56 and tightened. The ribs 49 to 56 plastically deform in the direction of arrow B from the shape indicated by the two-dot chain lines X and Y, and embrace the outer peripheral surface of the internal heat exchange pipe 17 in a surface contact state. Further, as shown in FIG. 7, heat transfer grease 23 is filled in the gaps between the ribs 49 to 56 and the inner surfaces 47 and 48. As a result, the heat transfer grease 23 is also filled in the gaps between the ribs 49 to 56 and the outer peripheral surface of the internal heat exchange pipe 17. Therefore, the cold heat of the internal heat exchange pipe 17 is not only conducted to the regenerator material 1 via the ribs 49 to 56, but also the wall portions constituting the inner surfaces 47, 48 of the respective mold members 41, 42 via the heat transfer grease 23. Is also transmitted from.

In FIG. 7, reference numerals 60 and 61 are gutters, and each of the mold members 41 and 4 is
It is a U-shaped integrally molded product with a shallow bottom that opens upward from the lower end of 2. Further, reference numerals 62 and 63 are roofs,
It is a shallow U-shaped integrally molded product that opens downward from the upper end of each mold member 41, 42. The heat insulating material 25a described in the first embodiment is attached to the lower surfaces of the gutters 60 and 61 and the upper surfaces of the roofs 62 and 63 to prevent dew condensation.

Also according to the structure of the second embodiment, the regenerator material 21 is configured so as not to come into direct contact with the internal heat exchange pipe 17. Therefore, as the regenerator material 21, inorganic salts having strong corrosive properties such as calcium chloride and phosphate are adopted. However, the internal heat exchange pipe 17
Can be prevented from corroding.

Moreover, since the metal ribs 49 to 56 are plastically deformed at the time of abutment and hold the internal heat exchange pipe 17 in a surface contact state, the ribs 49 to 56 are not in contact with the outer peripheral surface of the internal heat exchange pipe 17 at the time of forming parts.
Even if there is a slight gap between 56 to 56, by fitting the ribs 49 to 56 to the outer peripheral surface of the internal heat exchange pipe 17 upon completion of assembly, cold heat is transferred to the regenerator material 21 while maintaining high airtightness. can do. Therefore, although the tolerance of the dimensional error of the cooler outer casing 16 is increased, the heat transfer efficiency is improved.

Further, since the heat transfer grease 23 is also filled in the gaps between the ribs 49 to 56 and the outer peripheral surface of the internal heat exchange pipe 17,
The cold heat of the internal heat exchange pipe 17 is not only conducted to the regenerator material 21 via the ribs 49 to 56, but also from the wall portion forming the inner surfaces 47, 48 of the respective mold members 41, 42 via the heat conductive grease 21. Is also transmitted.

The cooler outer casing 16 is not limited to the case of being formed by the two mold members 41 and 42, but may be formed by combining a large number of mold members of two or more.

(Effects of the Invention) As described above, in the cooler containing a cold storage material for the cold storage box of the present invention, the cold storage material 21 is configured so as not to come into direct contact with the internal heat exchange pipe 17, so that calcium chloride is used as the cold storage material 21. Even if a highly corrosive inorganic salt such as phosphate is adopted, the internal heat exchange pipe 17 can be prevented from corroding. Therefore, the range of selection of the material of the internal heat exchange pipe 17 is widened, and the cost of the entire product can be reduced.

Further, according to the present invention, the integrally formed cooler outer box 16
Alternatively, since the cooler outer box 40 composed of the mold members 41 and 42 that are integrally connected is adopted, the heat transfer grease 23 can be filled in each gap. Therefore, the heat transfer grease 23 facilitates maintaining the airtightness of the fitting portion of the outer peripheral surface of the internal heat exchange pipe 17, and
The cold heat from the internal heat exchange pipe 17 is easily transferred to the regenerator material 21. Therefore, even if there is a slight gap in the fitting portion of the outer peripheral surface of the internal heat exchange pipe 17 when forming each component, by filling the heat transfer grease 23 when the assembly is completed,
Cold heat can be transferred to the cold storage material 21 while maintaining high airtightness. Therefore, the heat transfer efficiency is improved as much as possible even though the tolerance of the dimensional error of the cooler outer casings 16 and 40 is increased.

Therefore, according to the present invention, it is possible to provide an inexpensive cooler containing a cool storage box for a cool box, which can prevent corrosion of the internal heat exchange pipe 17 while improving the cool storage capacity and the heat transfer efficiency.

Further, according to the present invention, since the troughs 25, 60, 61 having a U-shaped cross section that opens upward from the lower ends of the mold members 41, 42 constituting the outer box 16 or 40 are provided, the outer boxes 16, 40 are provided.
Even if water droplets condense on the outer surface of the product, the product in the cold storage chamber 12 will not be splashed with water.

[Brief description of drawings]

FIG. 1 is a front view of a cool box adopting the present invention, and FIG.
FIG. 1 is a view taken from the arrow (II) of FIG. 1, FIG. 3 is a cross-sectional view of the cooler outer box of the present invention, and FIG. 4 is a front view of a cooler adopting the cooler outer box of FIG. FIG. 5 is a view taken in the direction of arrow V in FIG. 4, FIG. 6 is a view taken in the direction of arrow (VI) in FIG. 5, and FIG. 7 is a cross-sectional view of a cooler outer case showing another embodiment, and FIG. FIG. 7 is a partially enlarged view showing a main part of FIG. 7. 10 ... Main body of heat insulation cooling box, 12 ... Cooling room, 13 ... Refrigerator, 15 ... Cooler, 16, 40 ... Cooler outer box, 17 ... Internal heat exchange pipe, 18 ... Partition part, 19 ...
Cylindrical part, 20 ... Plate part, 21 ... Regenerator material, 22 ... Through hole, 23
… Heat transfer grease, 25, 60, 61… Gutter, 41, 42
... Mold material, 43-46 ... Abutting part, 47, 48 ... Inner surface, 49
~ 56 ~ rib

Claims (2)

[Scope of utility model registration request] 1. A cooler containing a regenerator material, which is provided in the upper part of a cold insulation box having a refrigerator, has a hollow outer casing which is an integrally molded product made of metal, fins which extend integrally from an outer surface of the outer casing, and the outer casing. A cold storage material stored in the hollow inside of the box, and an internal heat exchange pipe made of metal that is thermally connected to the cold storage material are provided, and the outer box is a gutter having a U-shaped cross section that opens upward from the lower end thereof. , A partition part that divides the inside of the outer box into two is integrally provided, and the partition part is a plurality of thin-walled cylindrical parts that are arranged in parallel to form a through hole, and the respective cylindrical parts are connected together with the respective cylindrical parts. A thin plate part that divides the inside of the outer box into two parts is integrally provided, and the internal heat exchange pipe is fitted into the through hole of this tubular part and the gap between the two parts is filled with heat conductive grease. Cooler with regenerator material for boxes. 2. A cooler containing a regenerator material, which is provided in the upper part of a cold insulation box having a refrigerator, has a hollow outer casing made of metal,
The outer box is provided with a fin extending integrally from the outer surface of the outer box, a regenerator material stored in the hollow inside of the outer box, and a metal internal heat exchange pipe thermally coupled to the regenerator material. , A pair of hollow metal mold members that are integrally abutted against each other, and each of the mold members has a U-shaped cross section that opens upward from its lower end and the internal heat at the abutting portion. An inner surface that defines a space in which the exchange pipe is piped, and a plurality of hook-shaped ribs that project from the inner surface and form a pair with the rib of the other mold material are integrally provided, and the shape of the rib is
By abutting against the inner surface of the other mold material at the time of abutting and plastically deforming, the internal heat exchange pipe is sandwiched in a surface contact state with the corresponding rib of the other mold material, and between the rib and the inner surface and between the ribs. A cooler containing a cold storage material for a cool box, characterized in that a heat transfer grease is filled in a gap between the heat exchange pipe and the internal heat exchange pipe.