JP2015001329A - Heat insulation box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat insulation box which inhibits the deterioration of aesthetics thereby reducing the manufacturing costs.SOLUTION: In a heat insulation box, a foam heat insulation material 23 fills a space between an inner box 9 having opening parts on a front surface and an outer box 8 which covers the exterior side of the inner box 9. The inner box 9 includes: an extension part 28 extending from a periphery 27 of the opening parts 3a, 4a, 5a to the outer side; and a groove part 29 which is recessed in the extension part 28. The outer box 8 includes a front surface part 35 which covers a front surface of the groove part 29. A gas venting hole 30 for venting a gas when the foam heat insulation material 23 is foamed is provided on a bottom surface 29a of the groove part 29.

Description

  The present invention relates to a heat insulating box having a gas vent hole in a foam heat insulating material.

  A heat insulating box used in a conventional refrigerator or the like is disclosed in Patent Document 1. The heat insulating box has an inner box having an opening on the front surface and an outer box covering the outside of the inner box, and a foamed heat insulating material such as polyurethane foam is filled between the inner box and the outer box.

  An inlet is provided on the bottom surface of the heat insulating box, and a plurality of gas vent holes are provided in the extending portion extending outward from the peripheral edge of the opening of the inner box.

  A stock solution of foam heat insulating material is injected from the inlet, and the foam heat insulating material is filled between the inner box and the outer box. At this time, the gas generated between the outer box and the inner box is exhausted from the gas vent hole. Thereby, generation | occurrence | production of a void can be suppressed and a foaming heat insulating material can be filled.

JP 2011-196644 A

  According to the conventional heat insulation box, the foam heat insulating material may leak from the gas vent hole, and there is a problem that the manufacturing cost increases in order to remove the leaked foam heat insulating material. Furthermore, since the appearance is impaired by the gas vent hole, it is necessary to provide a member that covers the gas vent hole, and there is a problem that the manufacturing cost of the heat insulation box increases.

  An object of this invention is to provide the heat insulation box which can aim at reduction of manufacturing cost by suppressing the fall of aesthetics.

  In order to achieve the above object, the present invention provides a heat insulating box body in which a foam heat insulating material is filled between an inner box having an opening on the front surface and an outer box covering the outer side of the inner box. An extension part extending outward from the periphery of the part, and a groove part recessed in the extension part, and the outer box has a front part covering the front surface of the groove part, and the foam is formed on the bottom surface of the groove part. It is characterized by providing a gas vent hole when the heat insulating material is foamed.

  In the heat insulating box having the above-described configuration, the present invention includes a protrusion protruding rearward on the bottom surface of the groove and a holding portion bent continuously in a U shape on the front portion, and the holding portion is The front surface of the extended portion and the protrusion are sandwiched by elasticity.

  In the heat insulation box having the above-described configuration, the present invention further includes a partition part that partitions the interior of the inner box in the vertical direction to form a plurality of sections, and communicates with the groove and extends inward from the inner edge of the front part. The communication path is provided on the partition part or on the extension part adjacent to the partition part.

  Moreover, the present invention is characterized in that, in the heat insulation box having the above-described configuration, an injection port through which the foam heat insulating material is injected is provided on an upper surface or a bottom surface of the heat insulation box.

  According to the present invention, the outer box has a front surface portion that covers the front surface of the groove portion, and a gas vent hole is provided on the bottom surface of the groove portion. can do. Thereby, the fall of aesthetics can be suppressed and the manufacturing cost can be reduced.

Side surface sectional drawing which shows the refrigerator of 1st Embodiment of this invention. The perspective view of the heat insulation box of the refrigerator of 1st Embodiment of this invention. The top view of the heat insulation box of the refrigerator of a 1st embodiment of the present invention. The bottom view of the heat insulation box of the refrigerator of a 1st embodiment of the present invention. Bottom sectional view cut along line AA in FIG. The perspective view which removed the front part of the heat insulation box of the refrigerator of 1st Embodiment of this invention. The front view which expanded the X section of FIG. The front view which shows the communicating path of the heat insulation box of the refrigerator of 2nd Embodiment of this invention Side surface sectional drawing which shows the refrigerator of 3rd Embodiment of this invention. The perspective view which shows the heat insulation box of the refrigerator of 3rd Embodiment of this invention. Sectional drawing cut | disconnected by the BB line of FIG. E arrow view of FIG. Sectional drawing cut | disconnected by CC line of FIG. F arrow view of FIG. The rear view which shows the heat insulation box of the refrigerator of 3rd Embodiment of this invention. The perspective view which shows the heat insulation box of the refrigerator of 3rd Embodiment of this invention.

<First Embodiment>
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side sectional view showing the refrigerator 1 of the first embodiment. The refrigerator 1 has a heat insulating box 2 filled with a foam heat insulating material 23 such as polyurethane foam between the outer box 8 and the inner box 9.

  The heat insulation box 2 is provided with a refrigerator compartment 3, a freezer compartment 4, and a vegetable compartment 5 in order from above. The refrigerator compartment 3 and the freezer compartment 4 are partitioned by a partition 6 that is separately formed and assembled in the inner box 9, and the freezer compartment 4 and the vegetable compartment 5 are partitioned by a partition 7 that is separately formed and assembled in the inner box 9. It is done. The partition parts 6 and 7 are filled with a foam heat insulating material 23.

  The refrigerator compartment 3 stores stored items in a refrigerator, and the front opening 3a is opened and closed by a pivotable door 3b. The freezer 4 stores stored items in a frozen state, and the opening 4a on the front surface is opened and closed by a drawer-type door 4b formed integrally with a storage case 12 for storing the stored items.

  The vegetable room 5 stores stored items refrigerated at a refrigeration temperature higher than that of the refrigerated room 3, and stores vegetables and fruits. The front opening 5a of the vegetable compartment 5 is opened and closed by a drawer-type door 5b formed integrally with the storage case 10.

  A machine room 16 is provided on the back side of the vegetable room 5. The machine room 16 is provided with a compressor 17 that operates the refrigeration cycle. The rear surface of the machine room 16 is closed by a machine room cover (not shown).

  A cool air passage 21 through which cool air flows is provided behind the freezer compartment 4. A discharge port 21 a and a return port 21 b that face the freezer compartment 4 are opened in the cold air passage 21. A cooler 15 serving as a low temperature part of the refrigeration cycle is disposed in the cold air passage 21. A blower fan 14 is disposed above the cooler 15.

  Behind the refrigerator compartment 3 is provided a cold air passage 22 communicating with the cold air passage 21 via a damper (not shown). A discharge port 22 a facing the inside of the refrigerator compartment 3 is opened in the cold air passage 22. A conduction path (not shown) that leads to the vegetable compartment 5 is led out in the refrigerator compartment 3, and the cold air that has flowed out of the refrigerator compartment 3 is discharged to the vegetable compartment 5 through the conduction passage.

  FIG. 2 shows a perspective view of the heat insulation box 2 as viewed from the front. The inner box 9 is formed of a resin molded product, and the outer box 8 is formed of a steel plate. The outer box 8 is arranged on the outer side of the inner box 9 with a predetermined distance from the inner box 9, and a foam heat insulating material 23 is filled therebetween.

  The outer box 8 is configured by connecting a top plate 41, side plates 43 and 44 (see FIG. 4), a back plate 40 (see FIG. 3), and a bottom plate. The top plate 41, the side plates 43 and 44, the back plate 40, and the bottom plate 42 form the top surface, both side surfaces, the back surface, and the bottom surface of the heat insulating box 2, respectively.

  3 and 4 show a top view and a bottom view of the heat insulation box 2. The top plate 41 and the bottom plate 42 are respectively provided with inlets 18 and 19 through which a stock solution of the foam heat insulating material 23 is injected. When the heat insulation box 2 is large, a plurality of inlets 18 and 19 may be provided on the top plate 41 and the bottom plate 42, respectively. The heat insulating box 2 is arranged with the back plate 40 facing downward, and the stock solution of the foam heat insulating material 23 is injected from the injection ports 18 and 19.

  FIG. 5 shows a bottom cross-sectional view taken along line AA in FIG. The inner box 9 has an extending portion 28 extending outward from the peripheral edge 27 of the opening 3a (the same applies to the openings 4a and 5a). A groove 29 is recessed in the center of the extended portion 28, and a front surface 35 that covers the groove 29 is provided in the outer box 8.

  FIG. 6 shows a perspective view of the heat insulating box 2 with the front surface portion 35 omitted. 5 and 6, the groove 29 is formed in an annular shape along the peripheral wall of the heat insulating box 2. A gas vent hole 30 is opened on the bottom surface 29 a of the groove 29, and a protrusion 31 is provided on the back side of the groove 29.

  The gas vent hole 30 is disposed on the inner side (inner box 9 side) than the protruding portion 31 and is formed to have a size (for example, a diameter of 1 mm) such that the foam heat insulating material 23 does not leak. Thereby, the gas generated when the foam heat insulating material 23 is filled is exhausted from the gas vent hole 30 into the groove 29 as indicated by an arrow D1.

  At this time, even if the foam heat insulating material 23 leaks from the gas vent hole 30, it is held in the groove portion 29 and the groove portion 29 is covered by the front surface portion 35. For this reason, it is not necessary to remove the leaked foam heat insulating material 23.

  The front portion 35 is formed by bending the front end of the outer box 8 made of a metal plate inward. In addition, the outer box 8 is formed with a holding portion 36 that is continuous with the front surface portion 35. The holding portion 36 is formed by folding a metal plate forming the outer box 8 at the inner edge of the front portion 35 and further bending it in a U shape outside the extending portion 28.

  Since the holding portion 36 is formed in a U shape, the front surface 28a of the extending portion 28 and the protruding portion 31 are sandwiched by elasticity. As a result, the inner box 9 is held by the outer box 8, and the foam heat insulating material 23 is filled up to the inner surface side of the protruding portion 31.

  FIG. 7 shows an enlarged front view of a portion X in FIG. The extending portion 28 of the inner box 9 is provided with a communication passage 9b adjacent to the left and right ends of the partition portion 6 for communicating the openings 3a, 4a and the groove portion 29, respectively. Further, the communication path 9 b is provided adjacent to the left and right end portions of the partition portion 7. The front surface of the communication path 9 b is covered with the front surface portion 35.

  At this time, the front surface of the communication passage 9b inside the front surface portion 35 is exposed, but the communication passage 9b is adjacent to the partition portions 6 and 7, so that the communication passage 9b is not conspicuous, and a decrease in the appearance of the heat insulating box 2 can be suppressed. The gas filled in the groove 29 is exhausted into the openings 3a and 4a as shown by arrows D2 and D3 through the communication passage 9b.

  According to the present embodiment, since the gas vent hole 30 is provided in the bottom surface 29a of the groove 29 recessed in the extended portion 28 of the inner box 8, the foam heat insulating material 23 leaked from the gas vent hole 30 is held in the groove 29. Can do. Moreover, since the groove part 29 is covered with the front part 35 provided in the outer box 8, the leakage of the foam heat insulating material 23 is prevented. Therefore, it is not necessary to separately provide a cover for covering the gas vent hole 30, and the removal of the leaked foam heat insulating material 23 can be made unnecessary. Therefore, the cost of the heat insulation box 2 can be reduced.

  Further, since the holding portion 36 elastically holds between the front surface 28a of the extending portion 28 and the protruding portion 31, the inner box 9 can be easily held by the outer box 8.

  In addition, since the communication passage 9b is provided adjacent to the partition portions 6 and 7 that form a plurality of sections by dividing the inside of the inner box 9 in the vertical direction, the foam insulation 23 can be easily filled through the communication passage 9b. Gas can be exhausted, and the communication passage 9b can be made inconspicuous, so that the appearance of the heat insulating box 2 can be prevented from being deteriorated.

  Moreover, since the inlets 18 and 19 into which the foam heat insulating material 23 is injected are provided in the upper surface plate 41 (upper surface) or the bottom surface plate 42 (bottom surface) of the heat insulating box 2, the inlets 18 and 19 are located at positions where it is difficult to see from the user. The appearance quality of the heat insulation box 2 can be improved.

Second Embodiment
Next, the refrigerator 1 of 2nd Embodiment is demonstrated. In this embodiment, a communication path 37 is provided instead of the communication path 9b (see FIG. 7) of the first embodiment. Other parts are the same as those in the first embodiment. FIG. 8 is a front view of the right end portion of the partition portion 6 and the groove portion 29 (portion corresponding to the portion X in FIG. 6) of the heat insulation box 2 of the present embodiment. For convenience of explanation, the same parts as those in the first embodiment are denoted by the same reference numerals.

  A communication passage 37 that communicates with the groove 29 and extends inward from the inner edge of the front surface 35 is provided on the front surface of the partition 6. Further, a cover (not shown) that covers the front surface is provided on the front surface of the partition portion 6 at a predetermined distance from the partition portion 6. Thereby, gas is discharged in the directions of arrows D4 and D5 when foaming heat insulating material 23 is foamed through communication passage 37.

  Similarly, a communication path 37 is provided at the left end of the partition 6, and a communication path 37 is also provided at the left and right ends of the partition 7. In addition, you may provide the communication path 37 in the upper and lower surfaces of the partition parts 6 and 7. FIG.

  According to this embodiment, the partition portion 6 is provided with the communication passage 37 on the partition portion 6 that communicates with the groove portion 29 and extends inward from the inner edge of the front surface portion 35. At the time of foaming 23, the gas can be easily exhausted, and the communication passage 37 is made inconspicuous so that a decrease in the appearance of the heat insulating box 2 can be suppressed.

<Third Embodiment>
Next, the refrigerator 1 of 3rd Embodiment is demonstrated. The present embodiment is different from the first embodiment in the structure of the back surface portion 39 of the heat insulating box 2, and the other portions are the same as those in the first embodiment. 9 and 10 are side sectional views showing the heat insulation box 2 of the present embodiment, and perspective views seen from the back. For convenience of explanation, the same parts as those in the first embodiment are denoted by the same reference numerals.

  A vacuum heat insulating material 48 is provided between the outer box 8 and the inner box 9 on the back surface portion 39 of the heat insulating box 2. The vacuum heat insulating material 48 is formed in a substantially rectangular shape having a uniform thickness, and the upper end extends to the vicinity of the upper surface plate 41 and the lower end extends to the vicinity of the machine room 16.

  An inlet 45 is provided in the back plate 40 provided in the back portion 39. Four inlets 45 are provided at positions that do not overlap with the vacuum heat insulating material 48 when rear projected, and the stock solution of the foam heat insulating material 23 is injected from the respective injection ports 45.

  FIG. 11 shows a bottom cross-sectional view taken along line BB in FIG. 10, and FIG. 12 shows a view taken in the direction of arrow E in FIG. The side plate 44 is formed with a groove 44a extending in the vertical direction by bending the rear end into an S-shape.

  In the side wall 44c of the groove 44a, gas vent holes 44b are arranged in parallel in a predetermined size (diameter 1 to 1.5 mm) with a period y1 (about 100 to 200 mm) in the vertical direction. The U-shaped portion 44d at the end of the side wall 44c abuts on the back plate 40 and is formed in a U-shape.

  The back plate 40 has bent portions 40a that bend both side ends forward, and the bent portions 40a are inserted into the groove portions 44a. The bent portion 40a is provided with a protrusion 40b and a gas vent hole 40c in order from the back. The protrusions 40b have a diameter of about 0.5 to 1.0 mm and are arranged in parallel in the vertical direction with a period y3 (about 50 to 100 mm).

  A passage through which a gas at the time of foaming of the foam heat insulating material 23 is discharged by forming a predetermined gap between the bent portion 40a and the groove portion 44a by the tip of the protruding portion 40b contacting the side wall 44e of the groove portion 44a. 49 is formed.

  The gas vent holes 40c have a predetermined diameter (about 1 to 1.5 mm) and are arranged in parallel in the vertical direction with a period y2 (about 100 to 200 mm). The side-by-side direction (up-down direction) in which the gas vent holes 44b of the side plate 44 are arranged is the same as the side-by-side direction in which the gas vent holes 40c are arranged. About 100 mm).

  The distance y0 from the center of the gas vent holes 40c, 44b to the bottom of the groove 44a is about 1/3 of the depth of the groove 44a. Further, the opposing side plates 44 are formed in the same manner.

  13 shows a side cross-sectional view taken along line CC in FIG. 10, and FIG. 14 shows a view taken in the direction of arrow F in FIG. A handle member 46 is provided at the rear end of the upper surface plate 41. The handle member 46 has a handle 47 and a groove 46a. The handle 47 is recessed at the left and right ends of the back surface of the handle member 46. Thereby, the handle 47 can be gripped when the user moves the heat insulating box 2.

  The groove part 46a is formed by opening the lower part, and the upper end part 40f of the back plate 40 is inserted into the groove part 46a. The upper end portion 40f is provided with a V-shaped portion 40d, and the tip end portion of the V-shaped portion 40d is in contact with the side wall 46b of the groove portion 46a.

  In the lower wall 40e of the V-shaped portion 40d, a gas vent hole 40h is arranged in parallel with a predetermined diameter (about 1 to 1.5 mm) and a cycle y4 (about 50 to 100 mm) in the left-right direction. In addition, a predetermined gap is formed between the back side wall 46 c of the groove 46 a and the back plate 40. Thereby, the channel | path 50 where the gas at the time of foaming of the foam heat insulating material 23 is discharged | emitted is formed.

  FIG. 15 is a plan view showing a lower end portion of the back plate 40. A large number of gas vent holes 40k (1 to 1.5 mm in diameter) are provided at the lower end of the back plate 40. In the present embodiment, the first pattern formed by the five gas vent holes 40k is repeated in the left-right direction at a predetermined cycle y5 (for example, about 40 to 50 mm).

  In addition, at the left and right end portions of the back plate 40, the second pattern composed of the gas vent holes 40k having a smaller quantity than the first pattern is repeated at the cycle y5. Thereby, the density of the gas vent hole 40k in the central portion in the left-right direction is larger than that at both ends.

  The gas vent hole 40k is covered with a cover (not shown) of the machine room 16. Further, an interval y6 between the upper gas vent hole 40k and the lower gas vent hole 40k of each pattern is formed to be about 15 to 20 mm.

  In the heat insulation box 2 of the said structure, the heat insulation box 2 is arrange | positioned facing the back plate 40 upwards, and the undiluted | stock solution of the foam heat insulating material 23 is inject | poured from each inlet 45. At this time, when the foam heat insulating material 23 is filled between the inner box 9 and the outer box 8 and foams, gas is generated. At this time, the gas is discharged at the rear end of the side plate 44 from the passage 49 as shown by an arrow D6 through the gas vent holes 44b and 40c as shown in FIGS.

  As shown in FIGS. 13 and 16, the gas is discharged from the passage 50 at the upper end portion 40f of the back plate 40 through the gas vent hole 40h as shown by an arrow D7.

  Further, by controlling the injection amount from each injection port 45, the filling of the foam heat insulating material 23 is completed near the lower end of the back plate 40. For this reason, by providing a large number of gas vent holes 40k in the vicinity of the lower end of the back plate 40, the gas during filling can be reliably discharged as shown by the arrow D8.

  According to the present embodiment, the side plate 44 has the bent portions 40a formed by bending both side ends of the back plate 40 inserted in the groove portion 44a formed by bending the rear end. And the gas vent hole 44b is provided in the side wall 44c of the groove part 44a, and the gas vent hole 40c is provided in the bending part 40a.

  For this reason, since the gas vent hole 44b and the gas vent hole 40c are not exposed, it is not necessary to separately provide a member for covering them, and the cost of the heat insulating box 2 and the refrigerator 1 can be reduced by preventing a decrease in aesthetic appearance.

  At this time, the gas vent hole 44b and the gas vent hole 40c are arranged at positions where they do not overlap in the side projection. For this reason, the foam heat insulating material 23 exposed from the gas vent hole 44 b is held between the side wall 44 c and the bent portion 40 a, and exposure to the outside through the passage 49 is prevented.

  Further, a gas vent hole 40h is provided in the upper end portion 40f of the back plate 40 inserted in the groove portion 46a provided in the handle member 46. For this reason, since the gas vent hole 40h is not exposed, it is not necessary to separately provide a member for covering them, and it is possible to reduce the cost of the heat insulation box 2 and the refrigerator 1 by preventing a decrease in aesthetic appearance.

  Further, a gas vent hole 40k provided at the lower end of the back plate 40 is covered with a cover (not shown) of the machine chamber 16. For this reason, since the gas vent hole 40k is not exposed, it is not necessary to separately provide a member for covering them, and the cost of the heat insulating box 2 and the refrigerator 1 can be reduced by preventing a decrease in aesthetic appearance.

  According to this invention, it can utilize for the heat insulation box which has the gas vent hole of a foaming heat insulating material.

DESCRIPTION OF SYMBOLS 1 Refrigerator 2 Heat insulation box 3 Refrigerating room 3a Opening part 4 Freezing room 4a Opening part 5 Vegetable room 5a Opening part 6, 7 Partition part 8 Outer box 9 Inner box 9a Inner wall 9b Communication path 10 Storage case 11 Small case 12 Storage case 14 Blower fan 15 Cooler 16 Machine room 17 Compressor 18 Inlet 19 Inlet 20 Cold air passage 21 Cold air passage 22 Cold air passage 23 Foam insulation 27 Peripheral 28 Extension portion 28a Front surface 29 Groove portion 29a Bottom surface 30 Gas vent 31 Projection portion 35 Front surface Part 36 Holding part 37 Communication path 39 Back part 40 Back plate 40a Bent part 40b Protruding part 40c Gas vent hole 40d V-shaped part 40e Lower wall 40f Upper end part 40h Gas vent hole 40k Gas vent hole 41 Top face plate 42 Bottom face plate 43 Side face plate 44 Side face plate 44a Groove 44b Degassing hole 44c Side wall 44d U-shaped part 44e Side wall 45 Injection 46 the handle member 46a groove 46b side wall 46c side wall 47 handle 48 vacuum heat insulator 49 passage 50 passage

Claims (4)

In a heat insulation box filled with a foam heat insulating material between an inner box having an opening on the front surface and an outer box covering the outside of the inner box,
The inner box has an extending part extending outward from the periphery of the opening, and a groove part recessed in the extending part,
The heat insulation box which the said outer box has the front-surface part which covers the front surface of the said groove part, and provided the gas vent hole at the time of foaming of the said foam heat insulating material in the bottom face of the said groove part. Protruding portions projecting rearward on the bottom surface of the groove portion, and a holding portion bent continuously in a U shape on the front surface portion,
The heat insulation box according to claim 1, wherein the holding portion elastically holds the front surface of the extending portion and the protrusion.   A partition part that partitions the inside of the inner box in the vertical direction to form a plurality of sections is provided, and a communication path that communicates with the groove part and extends inward from the inner edge of the front surface part is adjacent to the partition part or adjacent to the partition part The heat insulating box according to claim 1, wherein the heat insulating box is provided on the extended portion.   The heat insulation box according to any one of claims 1 to 3, wherein an injection port through which the foam heat insulating material is injected is provided on an upper surface or a bottom surface of the heat insulation box.

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