JP6200742B2 - refrigerator - Google Patents

Description

  The present invention relates to a refrigerator.

  Reducing the power consumption of refrigerators is becoming increasingly important, so it is important to review power-saving points in refrigerator design. Reducing heat leakage from the inside of the refrigerator is directly connected to power saving for refrigerators, and in recent years, refrigerators equipped with foamed polyurethane foam and vacuum heat insulating materials and equipped with high heat insulating performance and refrigerators with heat insulating doors have become widespread. ing.

  As a related technology of a refrigerator using such a vacuum heat insulating material, for example, JP 2010-14001 A (Patent Document 1), JP 2012-63403 A (Patent Document 2), and JP 2011-89734 A. (Patent Document 3).

  Patent Document 1 discloses a refrigerator in which a vacuum heat insulating material is disposed over the entire inner surface of a back plate excluding a foam heat insulating material injection port (Claim 7).

  Further, Patent Document 2 discloses a configuration in which a notch portion is provided in the vacuum heat insulating material so as not to overlap the foamed heat insulating material inlet (reference numeral 31a in FIG. 5).

  Patent Document 3 discloses a configuration in which two vacuum heat insulating materials are provided in an overlapping manner.

  Furthermore, it is well known to those skilled in the art that when a vacuum heat insulating material is disposed in a refrigerator, a rectangular vacuum heat insulating material is widely used.

JP 2010-14001 A JP 2012-63403 A JP 2011-89734 A

  The vacuum heat insulating material is in the form of a plate that is sealed by evacuating the outer packaging material. If the outer edge of the vacuum heat insulating material is suddenly changed, such as corners and round corners, the vacuum heat insulating material may be damaged due to stress concentration caused by evacuation of the vacuum heat insulating material, etc. There is a risk of becoming. Furthermore, since the vacuum heat insulating material is usually manufactured as a rectangular shape, it is necessary to process the other shape, which causes an increase in cost.

  In the heat insulating box of the refrigerator, the surface on which the injection port of the polyurethane foam is provided, for example, the vacuum heat insulating material provided on the back side is provided with a vacuum heat insulating material as wide as possible on the surface having the injection port in view of heat insulation performance, and vacuum The shape is such that the heat insulating material does not overlap the inlet.

  For example, in Patent Document 1, the outer edge is changed to a substantially right angle in order to avoid overlapping with the injection port after widely disposing the vacuum heat insulating material (FIG. 4, paragraph 0044, etc.). Therefore, although the coverage rate of the vacuum insulation material application surface is improved, the corners that cause vacuum leakage increase, the reliability as a refrigerator is reduced, and the processing cost of the vacuum insulation material is required. There was a possibility.

  Moreover, since the vacuum heat insulating material of patent document 2 arrange | positions in order to avoid a sharp change of an outer edge in order to avoid the abrupt change of an outer edge, the cover of the injection hole vicinity cannot be implement | achieved, As a result, the cover of a vacuum heat insulating material There was a problem that the rate decreased.

  Moreover, although patent document 3 discloses the aspect in which one vacuum heat insulating material overlaps with the other vacuum heat insulating material, it does not consider the relationship with the injection port, so as to improve the coverage ratio while avoiding the injection port. It does not indicate the shape or arrangement of the vacuum heat insulating material.

  Then, this invention provides the refrigerator with high reliability with respect to a vacuum leak etc., ensuring the heat insulation performance of the heat insulating material with respect to the surface in which the inlet was provided.

This invention is made | formed in view of the said situation, Comprising: It is a refrigerator provided with the surface which has an injection port which inject | pours a polyurethane foam, Comprising : On the said surface, a 1st vacuum heat insulating material and a 2nd vacuum A heat insulating material, and the first vacuum heat insulating material and the second vacuum heat insulating material are provided without blocking the inlet, and the first vacuum heat insulating material and the second vacuum heat insulating material are connected to each other. some overlap portion is formed by overlapping the second portion other than the overlapped portion of the vacuum heat insulating material of have a cover that covers the injection port near the second vacuum heat insulator bend The portion other than the overlapping portion of the second vacuum heat insulating material is substantially in contact with or pasted to the inner surface of the back wall constituting the heat insulating box .

  ADVANTAGE OF THE INVENTION According to this invention, the reliability with respect to a vacuum leak etc. can be provided, ensuring the heat insulation performance of the heat insulating material with respect to the surface in which the inlet was provided.

  Problems, configurations, and effects other than those described above will be clarified by the following description of embodiments.

It is a front view of the refrigerator which concerns on 1st embodiment. It is AA sectional drawing of FIG. It is the perspective view which turned up the back of the refrigerator which mounts the vacuum heat insulating material as a reference example in the process leading to this invention. It is a longitudinal cross-sectional view of the refrigerator carrying the vacuum heat insulating material as a reference example in the process leading to this invention. It is a rear view of the refrigerator as a reference example in the process leading to the present invention. It is a figure which shows arrangement | positioning of the vacuum heat insulating material of 1st embodiment. It is a figure explaining the overlap part which concerns on 1st embodiment. It is a figure explaining arrangement | positioning of the vacuum heat insulating material of the refrigerator which concerns on 3rd embodiment. It is a figure explaining arrangement | positioning of the vacuum heat insulating material of the refrigerator which concerns on 4th embodiment. It is a figure explaining the overlap part which concerns on 5th embodiment.

  The configuration of a refrigerator equipped with a vacuum heat insulating material as a reference example in the process leading to the present invention will be described with reference to FIGS. Hereinafter, portions where the outer edge changes rapidly, such as corners and round corners of the vacuum heat insulating material, are also referred to as “corners”.

  FIG. 3 is a perspective view with the back of a refrigerator equipped with a vacuum heat insulating material as a reference example in the process leading to the present invention facing up. A side wall vacuum heat insulating material 21 is inserted into the side wall 20 of the heat insulating box 1a (not shown). Four inlets 22 are opened in the back wall 17. The injection port 22 is a portion into which a nozzle for injecting the foamed polyurethane foam 19 (shown in FIG. 2) into the heat insulating box 1a can be inserted. Below the inlet 22 of the heat insulation box 1a, there is a step portion where the machine room 10 is provided.

  The first vacuum heat insulating material 18 as a reference example stored in the back wall 17 as a reference example in the process of the present invention has an inclined portion 18a, and two inlets 22 are located outside the inclined portion 18a. The two remaining in the corners of 17 are located. That is, the entire inlet 22 is not blocked by the first vacuum heat insulating material 18.

  FIG. 4 is a longitudinal sectional view of a refrigerator equipped with a vacuum heat insulating material as a reference example in the process leading to the present invention.

  FIG. 5 is a rear view of a refrigerator as a reference example in the process leading to the present invention.

  In FIG. 4, the entire auxiliary vacuum heat insulating material 18 ′ is attached to the first vacuum heat insulating material 18 so as to overlap. For this reason, in the arrangement of the vacuum heat insulating material as a reference example in the process leading to the present invention, the heat insulation performance can be improved by the overlapping portion described later, but the corners and the like increase by using a plurality of vacuum heat insulating materials. Nevertheless, the vacuum heat insulating material coverage on the back wall 17 side cannot be improved.

  In this way, in the process leading to the present invention, the cooler 8 is provided on the surface facing the cooler 8 by overlapping the vacuum heat insulating material so as to overlap the cooler 8 in the rear view of the refrigerator. The heat leakage from can be reduced.

  In the above embodiment, the first vacuum heat insulating material 18 is processed in order to avoid the two inlets 22 on the machine room 10 side. However, in order not to cause a corner or the like whose outer edge changes suddenly, it is relatively far away. Therefore, it is difficult to improve the cover ratio in the vicinity of the inlet 22 on the machine room 10 side. In addition, two inclined portions are provided and stacked as a second vacuum heat insulating material (auxiliary vacuum heat insulating material 18 ') in a rectangular shape at a position corresponding to the cooler 8 where it is desired to further improve heat insulation. The sum of the numbers is 10.

[First embodiment]
Hereinafter, although the refrigerator which concerns on 1st embodiment is demonstrated referring an accompanying drawing, it is not necessarily restricted to this, A various well-known structure is employable in the range which does not affect the thought of this invention.

  FIG. 1 is a front view of the refrigerator according to the present embodiment.

  2 is a cross-sectional view taken along the line AA in FIG.

  In FIG. 1, the refrigerator main body 1 is arranged as a storage room in the order of a refrigerator room 2, an ice making room 3, an upper freezing room 4, a lower freezing room 5, and a vegetable room 6 side by side with the ice making room 3. Each of these storage chambers is provided with doors 2a, 3a, 4a, 5a, 6a for closing the front opening. Two doors 2a that close the front opening of the refrigerator compartment 2 are rotatably held by a hinge 2b, and are opened and closed in a door-to-door manner. The other doors 3a, 4a, 5a, 6a are drawer-type doors that move in the front-rear direction and close the openings of the storage chambers.

  In FIG. 2, a cooler chamber 7 is formed inside the refrigerator main body 1, and a cooler 8 is accommodated in the cooler chamber 7. A machine room 10 is provided at a position facing the back side of the vegetable room 6 and separated from the heat insulation wall 9, and a compressor 11 is installed in the machine room 10. Although the compressor 11 and the cooler 8 are not shown, a condenser and a capillary tube are sequentially connected by a refrigerant pipe to constitute a refrigeration cycle.

  A cool air circulation fan 12 is attached to the upper part of the cooler 8. The cold air circulation fan 12 is for forcedly circulating the cold air cooled by the cooler 8 to the refrigerator compartment 2, the ice making chamber 3, the upper freezer compartment 4, the lower freezer compartment 5, and the vegetable compartment 6 for cooling. A damper 13 is attached to the downstream side of the cool air circulation fan 12. The damper 13 is for distributing the cold air blown out by the cold air circulation fan 12 to each storage chamber. The operation of the damper 13 is controlled using an output from an operation board (not shown) as an input.

  The front surface of the refrigerator compartment 2 is closed with a refrigerator compartment door 2a. The front surface of the ice making chamber 3 is closed by an ice making chamber door 3a (shown in FIG. 1). The front surface of the upper freezer compartment 4 is closed with an upper freezer compartment door 4a. The front surface of the lower freezer compartment 5 is closed with a first freezer compartment door 5a. The front surface of the vegetable compartment 6 is closed with a vegetable compartment door 6a.

  The top wall vacuum heat insulating material 14 is accommodated in the top wall 2c of the refrigerator compartment 2. A partition wall vacuum heat insulating material 15 is accommodated in a partition wall 6 b that partitions the lower freezer compartment 5 and the vegetable compartment 6. A bottom wall vacuum heat insulating material 16 is accommodated in a heat insulating wall 9 between the vegetable room 6 and the machine room 10. A first vacuum heat insulating material 18 is accommodated in the back wall 17 at the back of each storage chamber 2, 3, 4, 5, 6. The vacuum heat insulating materials 13 to 16 and 18 housed in each wall are used in combination with the polyurethane foam foam 19.

  In FIG. 2, the overlap between the first vacuum heat insulating material 18 and the second vacuum heat insulating material 23 is omitted, but details thereof will be apparent from FIGS. 5 to 10 described later. The arrangement of the first vacuum heat insulating material 18 and the second vacuum heat insulating material 23 is the surface opposite to the cooler 8 on the back wall 17 provided with the inlet 22 (outer box 17b) as in this embodiment. May be affixed to the side surface), or may be affixed to the surface on which the cooler 8 is attached (the surface on the inner box 17a side), from the viewpoint of ease of application of the vacuum heat insulating material. The surface on the outer box 17b side is preferable, and the surface on the inner box 17a side is preferable from the viewpoint of heat insulation performance. Further, the first vacuum heat insulating material 18 and the second vacuum heat insulating material 23 may be installed without being attached, but in that case, from the viewpoint of suppressing the heat bridge phenomenon, for example, foaming of foamed polyurethane foam or the like. When filling the heat insulating material, care should be taken not to place the vacuum heat insulating material over the surface opposite to the cooler 8 and the surface on the side where the cooler 8 is attached.

  As described with reference to FIG. 2, the cooler 8 is attached in the cooler chamber 7. The refrigeration cycle mounted in the refrigerator is connected by piping in the order of a compressor, a condenser, a capillary tube, and a cooler. During this refrigeration cycle, the cooler is a part that generates cool air distributed to each storage room centering on the freezer compartment of the refrigerator, and has a low temperature in the range of about −20 ° C. to −40 ° C. Is attached to the side. Therefore, in the refrigerator, the portion where the cooler is arranged is a portion where the temperature difference from the outside air is large, and if heat leakage from this portion is reduced, significant power saving can be achieved.

  FIG. 6 is a view showing the arrangement of the vacuum heat insulating material of the first embodiment.

  As for the vacuum heat insulating material of the surface in which the inlet 22 in this embodiment is provided, both the 1st vacuum heat insulating material 18 and the 2nd vacuum heat insulating material 23 are substantially rectangular shapes. In this way, the sum of the number of corners and round corners can be suppressed, and the vacuum insulation can be suppressed, while the vacuum heat insulating material that is normally manufactured in a rectangular shape can be used as it is, thereby reducing processing costs. .

  FIG. 7 is a diagram illustrating the overlapping portion 23a according to the first embodiment.

  A first vacuum heat insulating material 18 is affixed to the inner surface of the back wall 17 constituting the heat insulating box 1a using a known method such as hot melt or double-sided tape. The first vacuum heat insulating material 18 does not overlap the inlet 22. Further, if the inlet 22 and the cooler 8 do not overlap in the front view of the surface on which the inlet 22 is provided, a vacuum heat insulating material that must be avoided from overlapping with the inlet 22 is provided in the cooler 8. It can arrange | position so that the corresponding range may be covered widely, and it is preferable from a viewpoint which can suppress a heat leak efficiently.

  The second vacuum heat insulating material 23 forms a bent portion 23c. Thereby, since parts other than the overlapping part 23a of the second vacuum heat insulating material 23 are substantially in contact with the inner surface of the back wall 17 and can be preferably attached, it is preferable in that the flow of the foamed polyurethane foam is not hindered.

  The second vacuum heat insulating material 23 is overlapped with, for example, a part of the first vacuum heat insulating material 18 joined by hot melt or double-sided tape or the like, and overlaps the two vacuum heat insulating materials (overlapping portion 23a). Preferably, it overlaps with a part of the cooler 8, more preferably with the whole in the front view of the back wall 17. The laminated relationship of the two vacuum heat insulating materials with respect to the overlapping portion 23a is not limited to the above, and may be a laminated relationship in which the first vacuum heat insulating material and the second vacuum heat insulating material are reversed. In this case, a 1st vacuum heat insulating material will be equipped with the bending part 23c. In addition, the 2nd vacuum heat insulating material 23 and the 1st vacuum heat insulating material 18 (up-down direction in the figure) are the length which does not reach the machine room 10, for example.

  According to this embodiment, while suppressing the number of corners and round corners of the vacuum heat insulating material, the coverage of the vacuum heat insulating material on the surface where the inlet 22 is provided is increased to further suppress heat leakage. Is possible. Furthermore, since one vacuum heat insulating material overlaps a part of the other vacuum heat insulating material, the heat insulating power in the overlapping portion 23a is excellent, and the inlet 22 is not subjected to any special processing on the vacuum heat insulating material. The coverage rate can be increased while avoiding the above.

[Second Embodiment]
The second embodiment is the same as the configuration of the first embodiment except for the following points.

  On the other hand, the vacuum heat insulating material on the surface where the injection port 22 is provided in the present embodiment is, for example, the first vacuum heat insulating material 18 in the vicinity of the injection port 22 and an inclined portion 18a (non-parallel to the long side of the back wall 17). The taper portion is provided with a substantially pentagonal shape, and on the other hand, for example, the second vacuum heat insulating material 23 is formed with a substantially rectangular shape. In this way, by arranging one vacuum heat insulating material having a substantially pentagonal shape so that the vicinity of the injection port 22 is tapered, overlapping with the injection port 22 is avoided, and the range of the overlapping portion 23a is enlarged. And it is preferable from a viewpoint which can arrange | position so that a coverage rate may be enlarged. In the substantially pentagonal vacuum heat insulating material, two apexes on the side close to the machine room 10 are made the same from the arrangement of the substantially hexagonal vacuum heat insulating material in FIG. This is the arrangement obtained (not shown).

  Also according to the present embodiment, the sum of the corners and the like is increased as compared with the first embodiment, but the same effects as in the first embodiment can be achieved in other respects. Further, compared with the first embodiment, the range of the overlapping portion 23a is enlarged, and the coverage of the vacuum heat insulating material on the surface provided with the inlet 22 is the same as that of the cover portion 26 in the third embodiment described later. Therefore, it can be further raised.

[Third embodiment]
The configuration of the third embodiment is the same as the configuration of the first to second embodiments except for the following points.

  Drawing 8 is a figure explaining arrangement of the vacuum heat insulating material of the refrigerator concerning a 3rd embodiment.

  One of the vacuum heat insulating materials of the present embodiment is a substantially hexagonal vacuum heat insulating material provided so that the inclined portion 18a (tapered portion) is positioned in the vicinity of the inlet 22, and the other is substantially rectangular. In this case, since it is possible to increase the area of the overlapping portion (overlap portion 23a) of the two vacuum heat insulating materials, it is possible to further improve the heat insulation performance and is preferable from the viewpoint of firmly bonding the overlap portion 23a. . At least a part of the remaining part other than the overlapping part 23 a of the second vacuum heat insulating material 23 forms a cover part 26.

  The bent portion 23c can be formed, for example, by pressing the second vacuum heat insulating material 23 using a mold. By filling a foam heat insulating material such as polyurethane foam 19 between the outer box 24 and the inner box 25, the first vacuum heat insulating material 18 and the second vacuum heat insulating material 23 are firmly fixed by the foaming effect. can do.

  According to the present embodiment, for example, the main hexagonal shape and the substantially rectangular shape of the two vacuum heat insulating materials are overlapped while avoiding the overlap with the inlet 22 of the vacuum heat insulating material. Compared with the technology in the process leading to the invention, as shown in FIG. 8, the first vacuum heat insulating material 18 does not cover and the second vacuum heat insulating material 23 covers the vicinity of the inlet 22 (cover portion). 26) can be newly covered, and the area of the overlapping portion 23a, which is the overlapping portion of the two sheets, can be secured widely.

  In addition, although illustration is abbreviate | omitted in 1st embodiment mentioned above, the inlet which the 1st vacuum heat insulating material 18 does not cover and the 2nd vacuum heat insulating material 23 covers similarly to this embodiment. A portion near 22 is a cover portion 26.

  Also according to the present embodiment, the sum of the corners and the like is increased as compared with the first embodiment, but the same effects as in the first embodiment can be achieved in other respects. Furthermore, compared to the first to second embodiments, the area of the overlapping portion 23a and the coverage rate can be further increased.

[Fourth embodiment]
The configuration of the fourth embodiment is the same as the configuration of the first to third embodiments except for the following points.

  FIG. 9 is a diagram for explaining the arrangement of the vacuum heat insulating material of the refrigerator according to the fourth embodiment of the present invention.

  An arc notch 23b is formed by a gentle curve so as not to cover the inlet 22. Further, the vertical direction of the second vacuum heat insulating material 23 is a rectangular shape having a length that does not reach the machine room 10. The overlapping portion 23 a where the first vacuum heat insulating material 18 and the second vacuum heat insulating material 23 overlap has substantially the same area as the evaporator 8 or a wide area.

  According to this embodiment, the same effect as that of the first embodiment can be obtained. Furthermore, compared with the first to third embodiments, the area of the overlapping portion 23a and the coverage rate can be further increased. Further, since the first vacuum heat insulating material 18 avoids the inlet 22 and the arc notch portion is formed by a gentle curve, there is no corner portion, and vacuum leakage can be further reduced.

[Fifth embodiment]
The configuration according to the fifth embodiment is the same as the configurations of the first to fourth embodiments except for the following points.

  FIG. 10 is a diagram for explaining an overlapping portion 23a according to the fifth embodiment.

  In FIG. 10, the first vacuum heat insulating material 18 is configured by, for example, laminating three raw cottons 18b (three layers of raw cotton) in the thickness direction. On the other hand, the part in the overlap part 23a of the 2nd vacuum heat insulating material 23 is made thinner than the thickness of the 1st vacuum heat insulating material 18, for example, is comprised by two raw cotton 23c (two-layer raw cotton). Thereby, it is possible to reduce the difference between the thickness of the vacuum insulating material in the overlapping portion 23a and other portions. The thickness adjustment is not limited to the above as long as the difference between the thickness of the overlapping portion 23a and the thickness of the other portion is reduced. For example, the overlapping portion of the first vacuum heat insulating material 18 and the second vacuum heat insulating material 23 The thickness at 23a may be made thinner than the other parts so that the overlapping part 23a and the thickness of the vacuum heat insulating material at the other parts are substantially the same or the same.

  Thereby, in this embodiment, the difference of the total thickness of the vacuum heat insulating material in the overlap part 23a and the thickness of the vacuum heat insulating material of the other part can be made small, and it flows between the outer box 24 and the inner box 25. It is possible to prevent the flow of the foamed polyurethane foam 19 from being hindered.

  As described above, according to the present embodiment, the flow path of the foamed polyurethane foam can be secured, so that the occurrence of unfilled foamed polyurethane foam and the like can be prevented.

  As described above, according to each embodiment, it is possible to provide a refrigerator with high reliability against vacuum leakage or the like while increasing the coverage of the heat insulating wall on the surface side provided with the inlet by the vacuum heat insulating material.

DESCRIPTION OF SYMBOLS 1 ... Refrigerator main body 1a ... Heat insulation box 2 ... Refrigeration room 2a ... Refrigeration room door 2b ... Hinge 2c ... Ceiling wall 3 ... Ice making room 3a ... Ice making room door,
4 ... Upper freezer 4a ... Upper freezer door 4b ... Partition wall 5 ... Lower freezer 5a ... Lower freezer door 6 ... Vegetable room 6a ... Vegetable room door 7 ... Cooler room 8 ... Cooler 9 ... Thermal insulation Wall 10 ... Machine room 11 ... Compressor 12 ... Cold air circulation fan 13 ... Damper 14 ... Vacuum heat insulating material 15 for top wall ... Vacuum heat insulating material 16 for partition wall ... Vacuum heat insulating material 17 for bottom wall ... Back wall 17a ... Inner box 17b ... Outer box 18 ... first vacuum heat insulating material 18 '... auxiliary vacuum heat insulating material 18a ... inclined portion 18b ... raw cotton 19 ... foamed polyurethane foam 20 ... side wall 21 ... side wall vacuum heat insulating material 22 ... inlet 23 ... second vacuum Insulating material 23a ... Overlapping part 23b ... Notch part 23c ... Bent part 24 ... Outer box 25 ... Inner box 26 ... Cover part

Claims (5)

A refrigerator having a surface having an inlet for injecting foamed polyurethane foam ,
On the surface, a first vacuum heat insulating material and a second vacuum heat insulating material are provided,
Providing the first vacuum heat insulating material and the second vacuum heat insulating material without blocking the inlet;
The first vacuum heat insulating material and the second vacuum heat insulating material overlap each other to form an overlapping portion, and the portions other than the overlapping portion of the second vacuum heat insulating material cover the vicinity of the inlet. a cover unit that possess,
The second vacuum heat insulating material forms a bent portion, and the portions other than the overlapping portion of the second vacuum heat insulating material are substantially in contact with or attached to the inner surface of the back wall constituting the heat insulating box. Refrigerator.   2. The refrigerator according to claim 1, wherein a thickness of the overlapping portion is thinner than a sum of thicknesses of the first vacuum heat insulating material and the second vacuum heat insulating material other than the overlapping portion. A cooler is provided on the back side of the refrigerator,
Providing the first vacuum heat insulating material and the second vacuum heat insulating material on the back side from the cooler;
The overlapping portion, in a front view of the overlapping portion, characterized in that there part or the Do heavy whole of the cooler, refrigerator according to claim 2.   4. The refrigerator according to claim 1, wherein one of the first vacuum heat insulating material and the second vacuum heat insulating material includes an inclined portion at a position in the vicinity of the inlet. 5.   The refrigerator according to any one of claims 1 to 3, wherein the first vacuum heat insulating material and the second vacuum heat insulating material have a substantially rectangular shape.