JP2002213869A - Heat insulating box and its manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the production cost of a heat insulating box. SOLUTION: A heat insulating box 18 is provided by foam filling a heat insulating material 18C between an outer box 18B and an inner box 18A, and comprises a drain outlet 62 formed in a bottom wall of the inner box and a cover member 63, that closes the drain outlet freely to open and close.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat insulating box constituting, for example, a main body of a commercial cooling storage, and a method of manufacturing the same.

[0002]

2. Description of the Related Art Conventionally, a commercial cold storage such as a commercial freezer or a high-humidity and low-temperature storage has an inner box made of a steel plate (stainless steel) incorporated in an outer box, and a heat insulating material such as foamed polyurethane is provided between the two boxes. The main body is composed of a heat-insulating box filled with a material.

[0003]

On the other hand, in the commercial freezer and the like, since the inside of the refrigerator is in a very low temperature and dry state, it is not necessary to discharge the wastewater from the refrigerator. There is no need to configure a path. However, in the high-humidity low-temperature storage and the like, since the inside of the heat-insulating box becomes high in humidity, it is necessary to form a drainage port on the bottom surface to form a drainage path.

Conventionally, an insulated box without a drain port and an insulated box with a drain port have been manufactured according to the use of such a commercial cooling storage, respectively, and there has been a problem that the production cost has increased.

[0005] The present invention has been made to solve such a conventional technical problem, and has as its object to reduce the production cost of a heat insulating box.

[0006]

According to a first aspect of the present invention, there is provided a heat insulating box formed by foaming and filling a heat insulating material between an outer box and an inner box, and formed on a bottom wall of the inner box. A drain port and a lid member attached to the inner box and closing the drain port so that the drain port can be opened and closed are provided.

According to the first aspect of the present invention, in a heat insulating box body formed by foaming and filling a heat insulating material between an outer box and an inner box, a drain port formed in a bottom wall of the inner box, A lid member that is attached and closes the drain port so as to be openable and closable. By closing the drain port of the inner box with this lid member, there is no drain port, that is, no drain path is required. An insulated box can be configured. When the drainage path is configured, the lid member is removed, the outer box and the heat insulating material corresponding to the drainage port of the inner box are removed, and a passage communicating between the inside and the outside of the heat insulating box through the drainage port is formed. It can be easily formed.

[0008] This eliminates the need to separately manufacture the heat-insulating box depending on the presence or absence of the drainage path, thereby making it possible to significantly reduce the production cost.

A heat insulating box according to a second aspect of the present invention is characterized in that the drain box of the inner box is connected to a drain socket for drainage.

According to the second aspect of the present invention, in addition to the above, a drain socket for drainage can be connected to the drain port of the inner box, so that workability in forming a drainage path is further improved. It is.

[0011] The method for manufacturing a heat-insulating box of the invention according to claim 3 is as follows.
A drain port is formed in the bottom wall of the inner box, and a lid member is attached to the inner box to close the drain port so that it can be opened and closed, and the inner box is incorporated in the outer box to foam a heat insulating material between the two boxes. It is characterized by filling.

According to a fourth aspect of the present invention, there is provided a method of manufacturing a heat insulating box.
In addition to the above, after foam filling of the heat insulating material, the lid member is removed from the inner box, the outer box and the heat insulating material corresponding to the drain port are removed, and a drain socket for drain is connected to the drain port. It is characterized by doing.

According to the third aspect of the present invention, a drain port is formed in the bottom wall of the inner box, and a lid member is attached to the inner box to close the drain port so that it can be opened and closed. Since the heat-insulating box body is manufactured by foaming and filling the heat-insulating material between the two boxes in the case where the lid member is attached to the inner box, there is no drain port, that is, a drain path is not required. It becomes an insulated box.

In the case of forming a drainage path, the lid member is removed from the inner box as in claim 4, and the outer box and the heat insulating material corresponding to the drain port are removed.
By connecting a drain socket for drainage to the drain port, an insulating box body having a drain path communicating between the inside and the outside of the insulating box body via the drain port is obtained.

This eliminates the need to separately manufacture the heat-insulating box body depending on the presence or absence of the drainage path, thereby making it possible to significantly reduce the production cost.

[0016]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows a vertical side view of a vertical commercial freezer R as an embodiment to which the present invention is applied. The freezer R of the embodiment is installed in, for example, a kitchen of a hotel or a restaurant, and has a heat-insulating box 18 opened at the front.
Constitutes the main body. The heat insulation box 18 includes an outer box 18B made of a steel plate such as stainless steel, and
An inner box 18A incorporated in the outer box 18B, and a polyurethane heat insulating material 18C filled between the inner and outer boxes 18A and 18B by an in-situ foaming method. The interior of the heat-insulating box 18 (the inner box 18A) is a storage room 20.

Further, a cooling device 24 is provided in the upper part of the storage room 20.
Cooler 35 is attached, and by the cooler 35 and a blower 36 attached near the cooler 35,
The inside of the storage room 20 is cooled to a predetermined temperature. In the drawing, 37 attached below the cooler 35 and the blower 36 is a partition plate for partitioning the inside of the storage room 20 from the cooling room 38 to which the cooler 35 is attached. The rear of the partition plate 37 is opened. Thereby, the blower 3
The cold air sucked from the storage chamber 20 into the cooling chamber 38 from 6 is exchanged with the cooler 35 and then discharged from the rear of the cooling chamber 38.

Further, a machine room 27 is defined on the top surface of the heat insulating box 18 by a front panel 25 and panels constituting both side surfaces and a rear surface. A cooling device 24 is formed in the machine room 27. A compressor 28, a condenser 29 and the like are installed, and together with the cooler 35, constitute a well-known refrigerant circuit of the cooling device 24. Reference numeral 30 denotes a condenser blower.

On the other hand, the front opening 22 of the storage room 20 (insulated box 18) is vertically divided at the center by a horizontal partition 23. The upper and lower openings 22 of the storage room 20 partitioned by the middle partition 23 are closed by two sets of double doors 2 so as to be openable and closable.

On the other hand, at the center of the back of the storage room 20,
A rear shelf support 12 is provided vertically. Further, on both side surfaces of the storage room 20, shelf supports 13 are provided at front and rear portions, respectively, and extend vertically. These rear shelf supports 1
A plurality of engagement holes 13 </ b> A (only the shelf support 13 is shown) are vertically formed in each of the second shelf support 13 and the shelf support 13, and a shelf 15 is provided in the rear shelf support 12 and the shelf support 13. It is erected multiple times above and below.

Here, spacers 40 are provided on the back side of the storage room 20 on both sides of the rear shelf support 12. The spacer 40 is a pillar member made of a hard synthetic resin formed to extend from above the upper ends of the rear shelf columns 12 and 13 to below the lower ends of the rear shelf columns 12 and 13. .
The spacer 40 is hollow inside, and the upper and lower ends are open. Incidentally, in the drawing, reference numeral 51 denotes an underlay.

When the cooling device 24 is operated, the cooling chamber 38
The cool air that has been heat-exchanged with the cooler 35 is discharged to the storage room 20 by the blower 36 from an opening formed behind the partition plate 37. The cool air discharged from the cooling chamber 38 partially falls between the shelf 15 constituted by the spacer 40 attached to the back of the storage room 20 and the back of the storage room 20. Further, a part of the cool air passes through the spacer 40 and is discharged to the lower part of the storage room 20. The remaining cool air is circulated into the storage room 20 as it is. Thereby, the inside of the storage room 20 is-
It is cooled to a freezing temperature such as 20 ° C.

In this case, since the spacing member 40 is provided on the back surface of the storage room 20 as described above, even if an article stored in a large storage case such as a cardboard is placed on the shelf 15, for example. It is possible to prevent the cool air passage between the shelf 15 and the back of the storage room 20 from being blocked by the article.

Thus, a cool air passage can be reliably secured between the shelf 15 and the back of the storage room 20.
The cool air discharged from the cooling chamber 38 can be easily supplied to the lower part of the storage chamber 20, and the cooling effect can be improved.

The spacer 40 is provided at the center of the rear shelf support 12.
, Which can efficiently and reliably prevent the blockage of the cool air passage by the article, so that the cooling effect of the lower portion of the storage room 20 can be further improved.

Furthermore, a part of the cool air passes through the spacer 40 and is directly supplied to the lower part of the storage room 20, so that the storage room 2
The inside of 0 is more uniformly cooled. In this way, the cool air that has dropped from the upper part of the storage room 20 to the bottom surface of the storage room 20 goes forward from the bottom surface of the storage room 20, rises and is sucked by the blower 36.

Next, the structure and manufacturing method of the heat insulating box 18 of the freezer R will be described. Bottom wall 1 of heat insulation box 18
In the central front part of the bottom wall 69 of the inner box 18A constituting 80,
As shown in FIG. 2, a circular concave portion 61 which is concave downward is formed, and a drain port 62 is formed in the concave portion 61. The drain port 62 is closed and opened by a circular resin lid member 63. This lid member 63
Has a peripheral flange 64 protruding downward from the peripheral portion, and an engaging claw 66 protruding downward with an interval inside thereof. The engagement claws 66 may be a series of annular ones or a plurality of separate ones protruding.

When manufacturing the heat insulating box 18,
First, the engaging claw 66 of the lid member 63 is connected to the drain port 6 of the inner box 18A.
The cover member 63 is attached to the inner box 18A by engaging with the storage box 20 from the storage room 20 side (upper side) in a detachable manner. At this time, the tip of the peripheral flange 64 of the lid member 63 is
Close to the upper surface, the upper surface of the lid member 63 is located at the upper part in the recess 61. The outer surface of the peripheral flange 64 and the recess 6
A seal material 67 (RTV or the like) is provided in a gap between the inner surfaces (upper surfaces) of the first device 1. As a result, the drain port 62 is
And completely sealed. Also, the engagement claws 66
A space 68 surrounded by the lid member 63 and the inner box 18 </ b> A is formed between the outer peripheral flange 64 and the peripheral flange 64.

As described above, the inner box 18A is assembled into the outer box 18B with the drain port 62 of the inner box 18A closed by the lid member 63. After the inner box 18A is assembled into the outer box 18B, the lid member 63 may be attached. And outer box 1
Insulation material 18 between the inner box 8B and the inner box 18A (including the lid member 63).
By foaming and filling C, the heat insulating box 18 is completed. In this state, the drain port 62 of the inner box 18A is
And the lid member 63 substantially fills the recess 61 of the inner box 18A, so that the heat insulating box 18 is no different from a heat insulating box without a drain port.

Further, in this case, the heat insulating material 18C is provided in the outer box 18B.
And the inner box 18A and the lid member 63 are adhered and integrated with each other. However, since the drain port 62 of the inner box 18A is sealed by the peripheral flange 64 of the lid member 63 and the sealing material 67, the heat insulating material 18C is There is no leakage to the upper surface of the wall 180.
In particular, since the space 68 is formed between the engaging claw 66 of the lid member 63 and the peripheral flange 64 as described above, the engaging claw 6
Even if the heat insulating material 18C leaks from the six portions to the peripheral flange 64 side, the heat insulating material 18C is stopped in the space 68. As a result, leakage of the heat insulating material 18C from the drain port 62 is effectively prevented.

Next, a case where the heat insulating box 18 is used for a high-humidity low-temperature storage will be described with reference to FIGS. FIG. 3 shows a vertical side view of the high humidity low temperature storage R1 of the embodiment. The main body of the high humidity and low temperature storage R1 in FIG.
Inside, a storage box 103 having good thermal conductivity and opened forward at a predetermined interval is provided. The storage box 103 is formed by screwing a heat conductive plate such as a stainless steel plate with a screw, and sealing the joint surface with a sealing material. A lower storage room 106 is formed below the storage room 105.

The storage box 103 and the inner box 1 of the heat insulation box 18
8A and the inside of the partition 104 are formed as a series of ducts 108 as a cool air passage.
09, the discharge side duct 108A and the return side duct 10
8B.

At the front opening of the heat-insulating box 18, a column 110 extending vertically is attached, and the partition 104 and the column 110 are mounted.
The front openings of the upper and lower storage chambers 105 and 106 which are partitioned by the upper and lower storage chambers 105 and 106 are a pair of upper and lower double door insulated doors 111.
And 112, respectively, so that they can be opened and closed freely.

A compressor 117, a condenser 118, and a blower 119 for the condenser constituting the refrigeration unit 116 in this case are installed on the top wall of the heat insulating box 18 in the same manner as described above. Grill 12 with
Concealed by one. Further, a cooler 122 constituting the refrigeration device 116 is mounted in the heat insulating box 18 and faces the duct 108 above the storage box 103, and is formed in a drain pan 123 below the cooler 122 (not shown). A blower 124 is mounted in the duct 108 in front of the cooler 122 corresponding to the fan cover.

When the blower 124 is operated, the cooler 12
The cold air cooled in 2 is supplied to the duct 108 as indicated by an arrow in FIG.
Is discharged to the discharge side duct 108A, flows downward and laterally from the upper surface of the storage box 103, flows into the partition 104, makes a U-turn, flows down the lower side, and flows below the bottom of the storage box 103. Then, the refrigerant flows into the return duct 108B, rises the return duct 108B, and returns to the suction side of the cooler 122 to perform circulation. The wall of the storage box 103 is cooled by the cooling air circulation, and the storage box 1 is placed in the upper and lower storage rooms 105 and 106.
It is indirectly cooled from the wall of No. 03. As described above, the upper and lower storage chambers 105 and 106 are indirectly cooled by the wall surface of the storage box 103, and the inside of the upper and lower storage chambers 105 and 106 is, for example, −5 ° C. due to the evaporating action of moisture from foods and the like stored therein and moisture entering from the outside. It is configured to be cooled and maintained at a high humidity of 80% to 90% within a range of from to + 13 ° C.

The upper surface 103A of the storage box 103 is inclined rearward and low.
A lower dew receiving plate 130 is disposed rearward along the slope at a predetermined interval below 3A. Also,
In the upper part of the lower storage chamber 106, a dew receiving plate 131 which is inclined rearward and lower at a predetermined interval below the lower surface of the partition part 104 is also arranged. In addition, the partition unit 104 includes the upper and lower storage rooms 1.
A communication pipe 132 communicating with the lower storage chamber 10 is provided, which communicates with the storage chambers 10 and 05 and is opened above the dew receiving plate 131.
A drainage path 133 for draining drain water in the upper and lower storage chambers 105 and 106 and the duct 108 is formed in the storage box 103 at the bottom of the container. 134 is the upper and lower storage room 1
It is a shelf for placing foods installed in 05 and 106.

Next, a procedure for forming the above-described drainage path 133 in the high-humidity low-temperature storage R1 will be described. First, before attaching the storage box 103 as described above, the engaging claw 66 of the lid member 63 is removed from the drain port 62 of the inner box 18A,
The lid member 63 and the sealing material 67 are removed from the inner box 18A. Next, the drain port 62 of the inner box 18A is drilled or the like.
A hole 181 is made in the outer box 18B at a portion corresponding to
8C is removed (see FIG. 4).

Next, a resin-made cylindrical drain socket 71 is inserted into the drain port 62 from the upper side of the inner box 18A, and the nut member 73 is inserted from below (the hole 181 side of the outer box 18B) through the sealing member 72. It is connected and fixed to the periphery of the drain port 62. Thus, the inside and outside of the heat insulating box 18 are communicated via the drain socket 71 of the drain port 62.

A communication pipe 74 is attached to the bottom of the lower storage chamber 106 and inserted into the drain socket 71 at intervals. On the other hand, a drain hose 76 is inserted into and connected to the lower end of the drain socket 71 from the hole 181. As a result, the drain passage 133 is formed, and the drain water in the lower storage chamber 106 enters the drain hose 76 via the communication pipe 74 via the drain socket 71, and the drain water in the duct 108 passes from the drain socket 71 to the drain hose 76. And will be discharged.

As described above, according to the present invention, the inner box 18A
A drain port 62 is formed in the bottom wall 69 of the first box, and a lid member 63 is attached to the inner box 18A to close the drain port 62 so as to be openable and closable.
Since the heat insulating box 18 is manufactured by foam-filling the heat insulating material 18C between the inner box 18A and the inner box 18B.
In the state attached to A, there is no heat-dissipating port, that is, a heat-insulating box constituting the freezer R that does not require a drainage path.

When the drainage path 133 is constructed as in the high-humidity and low-temperature storage R1 described above, the lid member 63 is removed from the inner box 18A, and the outer box 18B and the heat insulating material 18C corresponding to the outlet 62 are removed. By removing and connecting the drain socket 71 to the drain port 62,
Drainage path 133 that communicates the inside and outside of the heat insulating box 18 through the
It becomes the heat insulation box provided with.

Accordingly, it is not necessary to separately manufacture the heat insulating box body depending on the presence or absence of the drain passage 133, and it is possible to significantly reduce the production cost.

In the embodiment, the commercial freezer R and the high-humidity / low-temperature storage R1 have been described as examples, but it goes without saying that the heat-insulating box 18 in the present invention can be applied to other various storages. Further, in the embodiment, the drain socket 71 is connected to the drain port 62. However, the invention is not limited thereto, and a drain hose 76 may be directly attached to the drain port 62. In the embodiment, the heat insulating material 18C is also filled in the lid member 63. However, the present invention is not limited thereto, and a portion corresponding to the drain port 62 may be separately formed heat insulating material. May be inserted between the lid member 63 and the outer box 18B, and the formed heat insulating material may be removed together with the lid member 63 when the hole 181 is made in the outer box 18B.

[0044]

As described above in detail, according to the first aspect of the present invention, in a heat insulating box formed by foaming and filling a heat insulating material between an outer box and an inner box, a drain formed on a bottom wall of the inner box is provided. Since the mouth and the lid attached to the inner box and closing the drain port so that the drain port can be opened and closed, by closing the drain port of the inner box with this lid member, there is no drain port, that is, In addition, a heat insulating box that does not require a drainage path can be configured. When the drainage path is configured, the lid member is removed, the outer box and the heat insulating material corresponding to the drainage port of the inner box are removed, and a passage communicating between the inside and the outside of the heat insulating box through the drainage port is formed. It can be easily formed.

This eliminates the need to separately manufacture the heat-insulating box depending on the presence or absence of the drainage path, thereby making it possible to significantly reduce the production cost.

According to the second aspect of the present invention, in addition to the above, a drain socket for drainage can be connected to the drain port of the inner box, so that the workability in forming the drainage path is further improved. It is.

According to the third aspect of the present invention, a drain port is formed in the bottom wall of the inner box, and a lid member is attached to the inner box to close the drain port so that it can be opened and closed. Since the heat-insulating box body is manufactured by foaming and filling the heat-insulating material between the two boxes in the case where the lid member is attached to the inner box, there is no drain port, that is, a drain path is not required. It becomes an insulated box.

In the case of forming a drain passage, the lid member is removed from the inner box as in claim 4, and the outer box and the heat insulating material corresponding to the drain port are removed.
By connecting a drain socket for drainage to the drain port, an insulating box body having a drainage path communicating between the inside and the outside of the insulating box body via the drain port is obtained.

This eliminates the necessity of separately manufacturing the heat-insulating box depending on the presence or absence of the drainage path, and makes it possible to significantly reduce the production cost.

[Brief description of the drawings]

FIG. 1 is a vertical side view of a commercial freezer to which the present invention is applied.

FIG. 2 is an enlarged sectional view of a bottom wall portion of a heat insulating box of the commercial freezer of FIG.

FIG. 3 is a vertical side view of a high-humidity low-temperature storage to which the present invention is applied.

FIG. 4 is an enlarged sectional view of a bottom wall portion of a heat insulating box of the high-humidity low-temperature storage of FIG. 3;

[Explanation of symbols]

 R Commercial freezer R1 High-humidity low-temperature storage 18 Insulated box 18A Inner box 18B Outer box 18C Insulation material 62 Drainage port 63 Cover member 71 Drain socket 133 Drainage route

Claims (4)

[Claims] 1. An insulating box body formed by foaming and filling a heat insulating material between an outer box and an inner box, comprising: a drain port formed in a bottom wall of the inner box; and a drain port attached to the inner box. A heat insulating box, comprising: a lid member that is openably and closably closed. 2. The heat insulation box according to claim 1, wherein a drain socket for drainage can be connected to a drain port of the inner box. 3. A drain port is formed in a bottom wall of the inner box, and a lid member is attached to the inner box to close the drain port so as to be openable and closable. A method for producing a heat-insulating box, characterized in that a heat-insulating material is foam-filled. 4. After foam filling of the heat insulating material, the lid member is removed from the inner box, the outer box and the heat insulating material corresponding to the drain port are removed, and a drain socket for drain is provided at the drain port. The method for manufacturing a heat insulating box according to claim 3, wherein the connection is performed.