JP2786966B2 - Cold storage - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat-insulating inner box having a space inside a heat-insulating outer box, and circulating cool air between the two boxes to store the room inside the inner box. To a low-temperature storage for indirectly cooling the storage.

[0002]

2. Description of the Related Art Conventionally, as shown in Japanese Patent Application No. 2-229341 previously filed by the applicant, a low-temperature storage chamber of this kind is provided with a heat conducting property at an interval inside an insulating outer box. The inner box is arranged, and the inside of the inner box is formed as a storage room, and cool air is circulated between the two boxes to indirectly cool the storage room from the inner box. Since the room is not cooled by direct invasion of cold air, drying is prevented, and therefore, it is possible to store fresh flowers and vegetables, which are preferably stored at high humidity, while maintaining the freshness of the flowers and vegetables.

[0003]

However, in order to dispose the side wall of the inner box with a space inside the side wall of the outer box, three types of spacers 100 as shown in FIGS.
101 and 102 were used. That is, each spacer is formed by bending a metal plate into a crank shape, and one end of the spacer 100 is screwed to the peripheral flange of the side wall 104 of the inner box as shown in FIGS.
As shown in FIG. 12, the spacer 101 is screwed at one end to a peripheral flange of the side wall 104 of the inner box, and is particularly used for maintaining the distance between the outer box as shown in FIG. At the corner portion, two side walls of the outer box constituting the corner are brought into contact with each other, and the side wall 104 of the inner box is contacted with the two side walls.
It is used to keep the distance between The spacer 10
3 is screwed and fixed to the side wall 104 of the inner box, or to both the green tuff panel 106 and the outer box as shown in FIG. 14, and is used to fix them at intervals to the outer box.

As described above, the conventional spacers 100 to 102 are used.
Are all fixed to the side wall 104 of the inner box by screws, so that the work of installing the inner box is extremely complicated. Further, the spacers 100 to 102 are also different from each other, and the use of the spacers at the time of construction requires skill, and there is a disadvantage that the parts management is complicated. In order to dispose the bottom wall 107 of the conventional inner box at an interval above the bottom wall 108 of the outer box, angles 109 and 110 are disposed on the bottom wall 108 so as to cross each other as shown in FIG. And this angle 110
The bottom wall 107 of the inner box was placed on top.

However, according to such a configuration, the bottom wall 10
7 is not easy to position, especially at the time of construction.
When working on the top, the position of the bottom wall 107 shifts,
It must be reworked in the middle of the work. Further, since the lower part of the side wall 104 of the inner box is not held, there is a disadvantage that the spacer 100 has to be attached to the lower end of the side wall 104 in the related art.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and improves the workability of the construction of a low-temperature storage in which an inner box having good thermal conductivity is arranged inside the outer box at intervals. The purpose is to let them.

[0007]

According to the first aspect of the present invention, a low-temperature refrigerator (1) comprises a heat-insulating outer box (2) comprising a top wall (2A), a bottom wall (2B) and side walls (2C-2F), and a predetermined inside of the outer box (2). Top wall 3A, bottom wall 3B, and side walls 3C to 3F arranged with an interval of
, The inner box 3 having good thermal conductivity forming the storage room 10 therein, the side walls 2C to 2F of the outer box 2, and the side walls 3C to 3C of the inner box 3
A space holding member (attachment) 32 for holding a space between the outer case 2 and the inner case 3 to cool the storage room 10 indirectly by circulating cool air between the outer case 2 and the inner case 3. The spacing member (attachment) 32 is provided at one end with the side walls 3C to 3F of the inner box 3.
The insertion portion 33 inserted into and engaged with the insertion portion (insertion hole) 31 formed in the inner box 3 and the side wall 3 of the inner box 3 together with the insertion portion 33.
A supporting portion (supporting piece) 34 for holding C to 3F, and a fixing portion (contact wall) 37 which is fixed to the side wall 2C to 2F of the outer box 2 in contact with the other end. Things.

The low-temperature storage 1 according to the second aspect of the present invention includes a heat-insulating outer box 2 including a top wall 2A, a bottom wall 2B, and side walls 2C to 2F, and a predetermined space inside the outer box 2. Consists of a top wall 3A, a bottom wall 3B, and side walls 3C to 3F,
A heat conductive inner box 3 forming a storage chamber 10 therein is provided, and cool air is circulated between the outer box 2 and the inner box 3 to store the storage chamber 1 therein.
0 is indirectly cooled, and the side wall 2C of the outer box 2
2F and the bottom wall 2B, the pressing member 23 is arranged at a corner portion, and the pressing member 23 is attached to the bottom wall 3B of the inner box 3.
It has a holding portion (groove) 24 into which the edge portion and the lower end portions of the side walls 3C to 3F are inserted and engaged.

[0009]

According to the low temperature storage 1 of the first aspect of the present invention, the insertion portion 33 at one end of the spacing member (attachment) 32 is inserted into the insertion portion (insertion hole) 31 of the side walls 3C to 3F of the inner box 3. , The insertion portion 33 together with the support portion (supporting piece) 34 sandwiches the side walls 3C to 3F of the inner box 3. As a result, the spacing member (attachment) 32 is attached to the side walls 3C to 3F of the inner box 3, and in this state, the spacing member (attachment) 32 is attached.
Is fixed to the side wall 2C of the outer box 2
2F, the side walls 3C to 3F of the inner box 3 can be fixed to the side walls 2C to 2F of the outer box 2 at a certain interval.

Further, according to the low-temperature refrigerator 1 of the second aspect of the present invention, the inside of the holding part (groove) 24 of the pressing member 23 disposed at the corner of the side walls 2C to 2F and the bottom wall 2B of the outer box 2 is formed. Since the bottom wall 3B edge of the box 3 is inserted and engaged, the position of the bottom wall 3B of the inner box 3 is uniquely determined. Further, the lower ends of the side walls 3C to 3F of the inner box 3 are also inserted into and engaged with the holding portions (grooves) 24 of the holding member 23, so that the lower ends of the side walls 3C to 3F can be maintained at intervals from the side walls 2C to 2F. The spacer at the lower part of the side walls 3C to 3F as in the related art can be omitted.

[0011]

Embodiments of the present invention will be described below in detail. FIG. 1 is an enlarged vertical sectional view of the low-temperature storage 1 showing attachment of the inner box 3, FIG. 2 is a schematic vertical cross-sectional view of the low-temperature storage 1, and FIG. The low-temperature refrigerator 1 is, for example, a prefabricated refrigerator, and includes a top wall 2A, a bottom wall 2B, front and rear and left and right side walls 2C, 2D formed of a single or a plurality of heat insulating panels having a convex portion or a concave portion at a connection portion with an adjacent panel. 2E, 2F, a heat-insulating outer box 2 comprising a box body, a top wall 3A, a bottom wall 3B, front and rear and left and right side walls 3C arranged at intervals inside the outer box 2; A box-shaped heat conductive inner box 3 made of 3D, 3E and 3F, and a storage room 10 hermetically sealed in the inner box 3
And a cool air circulation space 11 formed between the upper and lower, front, rear, left and right boxes 2, 3.

Each of the walls 3A, 3B, 3 constituting the inner box 3
C, 3D, 3E and 3F are each composed of a single or a plurality of panels made of a magnetic stainless steel plate containing iron, and a part of the side walls 3C to 3F adsorbs ethylene gas generated from stored articles. Equipped with the green tuff. In addition, the top wall 3A of the inner box 3 is gradually lowered left and right with the center at the top as a top, so that the top wall 3A
The water droplets adhering to the lower surface of A do not fall down as they are, but flow along the inner surfaces of the left and right side walls 3E and 3F. On the front wall 2D of the outer box 2, there are provided an article doorway 7 for taking in and out of stored products, for example, agricultural products such as fresh flowers and vegetables, and a heat insulating door 8 for closing the article doorway 7 so as to be able to open and close and making the storage room 10 closed. Is provided.

At the upper right end of the top wall 3A constituting the cool air circulation space 11, a cooler 12 represented by an evaporator constituting a part of a refrigeration cycle, a first fan comprising a blower fan and a blower fan motor. An internal cooling device 14 having a blower 13 is disposed, and a drainage device 15 including a heater-equipped drainage pipe or the like led out of the outer box 2 is connected to the bottom of the cooling device 14. ing.

The first blower 13 is operated intermittently by a temperature sensor (not shown) for detecting the temperature in the cool air circulation space 11 and exchanges heat with the cooler 12 to cool the cooled cool air. Blow out inside. That is, when the inside of the storage room 10 is cooled to, for example, 0 ° C., when the temperature in the cool air circulation space 11 becomes, for example, −3 ° C., the first blower 13
Is stopped and operated when the temperature reaches -1 ° C. on the other hand,
A second blower 18 is attached to the upper left end of the top wall 3A located on the leeward side of the first blower 13 and is constantly operated to circulate the cool air evenly in the cool air circulation space 11 as shown by arrows. . Thereby, the wall surface of the inner box 3 has an average of −
It is cooled to about 2 ° C., and the inside of the storage room 10 is indirectly cooled from the wall surface of the inner box 3 and is maintained at about 0 ° C. The drying in the storage room 10 is suppressed by such indirect cooling, and thus the storage room 10 is maintained at a high humidity. Therefore, the fresh flowers and vegetables can be stored with good freshness.

Here, in FIG. 1 and FIGS.
The construction procedure of each of the walls 3A to 3F will be described. After assembling the walls 2A to 2F of the outer case 2 and attaching the cooling device 14 and the second blower 18 to the outer case 2, first, the bottom wall 2B of the outer case 2 is placed on the bottom wall 2B in a direction orthogonal to the cold air circulation direction. The first angle 20 is fixed at a predetermined interval to the first angle 2.
The second angles 21 are attached at a predetermined interval in the direction of the cool air circulation on the upper side. A support member 22 is formed by these angles 20 and 21.

Next, a plurality of pressing members 23 as shown in FIG. 7 are arranged at predetermined intervals at corners formed by the bottom wall 2B and the side walls 2C to 2F of the outer box 2. The pressing member 23 has a rectangular shape opened rearward and upward and downward, and the upper portion of the front wall 23A is bent forward and then upward with a space between the front edges of the left and right walls 23B and 23C. Thus, a groove 24 having a predetermined width as a holding portion is formed. A notch 23D is formed at the center of the upper edge of the front wall 23A. The holding member 23 is configured such that the lower and rear edges of the left and right walls 23B and 23C
B and the side walls 2C to 2F. Next, the bottom wall 3B of the inner box 3 is placed on the support member 22, and a peripheral flange 26 bent downward at the peripheral edge thereof is inserted into the groove 24 of the pressing member 23 from above and engaged therewith. I do. Here, the bottom wall 3B is composed of a plurality of panels,
When 3 comes to the joint of the panel, the butted peripheral flange 26 is avoided at the notch 23D. The positioning of the bottom wall 3B is performed in this manner, and the bottom wall 3B is positioned.
The movement is restricted by the pressing member 23 at the periphery thereof, so that the position does not shift even if the operator gets on the bottom wall 3B for the subsequent construction work.

Next, the process moves to the front and rear left and right side walls 3C to 3F. As shown in the plan view of FIG. 5, on both sides of each of the side walls 3C to 3F, a folded back flange 28 is formed (only the left side wall 3E is shown in the figure).
A lower edge flange 29 extending downward is formed on the lower edge of C to 3F. Further, FIG.
As shown in the cross-sectional view of FIG. 5, a plurality of insertion holes 31 are formed as insertion portions. The side walls 3C to 3F are fixed to the inside of the outer box 2 with a space therebetween by a fixture 32 as a space holding member shown in FIG.

The attachment 32 is formed by injection molding a hard synthetic resin such as polycarbonate. The dimension from one end to the other end of the base 35 is a length suitable for constituting the cold air circulation space 11. Have been. One end of the attachment 32 has an arrowhead-shaped insertion portion 33 having a predetermined elasticity, and a rear portion behind the insertion portion 33 having a sufficient interval to absorb the thickness of the side walls 3C to 3F as a support portion. The support piece 34 is formed to face the insertion portion 33, and on the surface of the support piece 34 on the side of the insertion portion 33, ridges 36, 36 protruding so as to narrow the interval between the support portion 34 and the insertion portion 33. Two articles are formed. On the other hand, the other end of the fixture 32 has a base 3
5, a contact wall 37 as a fixed portion having a predetermined area is formed on a plane orthogonal to the longitudinal direction. The contact wall 37 has a portion extending at least upward from the base 35, and a through hole 38 for screwing is formed in an upper portion of the contact wall 37.

The insertion portion 33 of the mounting fixture 32 is connected to the side walls 3C to 3C.
It is inserted from the rear side into an insertion hole 31 formed in the folded flange 28 of the 3F, and is previously attached to the side walls 3C to 3F. At this time, since the insertion portion 33 having an arrowhead shape is inserted into the insertion hole 31 and then expanded by its restoring force, the insertion portion 33 is engaged with the insertion hole 31 as shown in FIG. Also, the ridges 36, 3 of the support piece 34,
6 is in close contact with the rear surface of the side walls 3C to 3F and sandwiches the side walls 3C to 3F together with the insertion portion 33, so that the gap between the fixture 32 and the side walls 3C to 3F is reduced, and as a result, there is a loose mounting. The tool 32 is prevented from falling down and the cool air leaking from the insertion hole 31 is prevented. As described above, since the attachment 32 is attached only by inserting and inserting the insertion portion 33 into the insertion hole 31, the attachment 32 to the side walls 3C to 3F is attached.
Is extremely easy to attach.

The attachments 32 are attached one by one to the respective insertion holes 31 of the side walls 3C to 3F.
The contact wall 37 of the fixture 32 attached to the insertion hole 31 located at the upper end portion of each of the side walls 3C to 3F as shown in FIG.
F, and the through hole 38 extends at least in the side wall 3.
It is located above C-3F. The rear surfaces of the side walls 3C to 3F to which the mounting fixture 32 is attached are opposed to the inside of the side walls 2C to 2F of the outer box 2 in an upright state, and the lower edge flange 29 is inserted into the groove 24 of the pressing member 23. FIG. 1 or FIG.
Insert and engage from above. Thereby, the side walls 3C-3
Since the distance between the lower end of F and the side walls 2C to 2F is held by the pressing member 23, the conventional spacer 10 shown in FIG.
0 can be eliminated (see FIG. 8).

Above that, the contact wall 37 of the fixture 32 attached to the side walls 3C to 3F is connected to the side walls 2C to 2C of the outer box 2.
Because the inner wall 3 abuts against the inner surface of the outer box 2, the distance between the side walls 3C to 3F of the inner box 3 and the side walls 2C to 2F of the outer box 2 is ensured. In this state, as described above, the contact wall 37 of the fixture 32 at the upper end extending above the upper end of the side walls 3C to 3F is screwed through the through hole 38 into the side wall 2C of the outer box 2 as shown in FIG. ２2F. Thus, the side walls 3C to 3F of the inner box 3 are attached to the inside of the side walls 2C to 2F of the outer box 2 with a space therebetween. Accordingly, the mounting member 32 at the upper end portion serves as a spacer for maintaining a space between the side walls 2C to 2F of the outer box 2 and the side walls 3C to 3F of the inner box 3, and also functions as a fixing member, and the lower mounting portion is provided. The tool 32 only serves as a spacer by abutting on the inner surfaces of the side walls 2C to 2F of the outer box 2, but in any case, the single-sided mounting tool 32 causes the side walls 3C to 3F.
Can be attached to the outer box 2.

After attaching the side walls 3C to 3F as described above, the upper edge flange 41 formed on the upper edge of the side walls 3C to 3F
The panel of the top wall 3A is placed on the top, and is fixed to the side walls 3C to 3F by the mounting bracket 42 and the screws 43, whereby the construction of the inner box 3 is completed.

[0023]

As described above in detail, according to the first aspect of the present invention, only the insertion portion at one end of the spacing member is inserted into and engaged with the insertion portion of the inner box side wall, and the insertion portion is together with the support portion. Since the gap holding member is attached to the inner box side wall while sandwiching the side wall of the inner box, it is extremely easy to attach the gap holding member to the inner box side wall. Further, in this state, by fixing the fixing portion at the other end of the space holding member to the side wall of the outer box and fixing it, the side wall of the inner box is fixed at a fixed interval to the side wall of the outer box. Therefore, the workability of the low-temperature storage can be significantly improved.

According to the second aspect of the present invention, the edge of the bottom wall of the inner box is inserted into and held by the holding portion of the pressing member disposed at the corner of the side wall and the bottom wall of the outer box. In addition, the position of the bottom wall of the inner box is uniquely determined, and the displacement during the construction work can be eliminated. Further, since the lower end of the side wall of the inner box can also be inserted and engaged with the holding portion of the holding member, the space between the lower end of the side wall and the side wall of the outer box is maintained. It is possible to significantly improve the workability of the construction of the low-temperature storage as a whole.

[Brief description of the drawings]

FIG. 1 is an enlarged vertical sectional view of a low-temperature storage for showing an inner box mounting structure.

FIG. 2 is a schematic vertical sectional view of a low-temperature storage.

FIG. 3 is a plan sectional view of a low-temperature storage;

FIG. 4 is a perspective view of an attachment.

FIG. 5 is an enlarged cross-sectional plan view of the low-temperature storage in a mounting part where the side wall of the inner box is mounted on the outer box.

FIG. 6 is an enlarged cross-sectional view of the inner box side wall of the insertion hole showing an engagement state between the attachment and the side wall of the inner box.

FIG. 7 is a perspective view of a pressing member.

FIG. 8 is an enlarged vertical sectional view of a low-temperature storage at a corner portion of a bottom wall and a side wall of the outer box.

FIG. 9 is a perspective view of a conventional spacer.

FIG. 10 is a perspective view of another conventional spacer.

FIG. 11 is a perspective view of yet another conventional spacer.

FIG. 12 is a perspective view of a side wall showing attachment of a side wall of a corner portion of a conventional inner box.

FIG. 13 is a perspective view of a side wall showing the mounting of the side wall of the conventional inner box.

FIG. 14 is a perspective view of a conventional panel with a green tuff showing installation of the panel.

FIG. 15 is an enlarged vertical sectional view of a corner portion of a bottom wall and a side wall of an outer box of a conventional low-temperature refrigerator.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Low-temperature storage 2 Outer case 3 Inner case 11 Cool air circulation space 14 Cooling device 23 Holding member 24 Groove 32 Mounting fixture 33 Insertion part 34 Supporting piece 37 Contact wall

Claims (2)

(57) [Claims] 1. A heat insulating outer box comprising a top wall, a bottom wall, and a side wall, and a top wall, a bottom wall, and a side wall disposed at predetermined intervals inside the outer box. A heat-conductive inner box forming a storage room, and an interval holding member for holding an interval between a side wall of the outer box and a side wall of the inner box are provided, and cool air is supplied between the outer box and the inner box. In a low-temperature refrigerator that circulates and cools the storage chamber indirectly, the spacing member is inserted at one end into and engaged with an inserted portion formed on a side wall of the inner box; A low-temperature storage having a support portion for holding the side wall of the inner box, and a fixing portion fixed to the other end in contact with the side wall of the outer box. 2. A heat insulating outer box comprising a top wall, a bottom wall, and a side wall, and a top wall, a bottom wall, and a side wall disposed at predetermined intervals inside the outer box. A low-temperature refrigerator that includes a heat conductive inner box forming a storage chamber and indirectly cools the storage chamber by circulating cool air between the outer box and the inner box; And a bottom wall, wherein a holding member is disposed at a corner formed by the holding member, and the holding member has a holding portion into which the bottom edge of the bottom wall and the lower end of the side wall of the inner box are inserted and engaged. Chiller.