JP6272113B2 - refrigerator - Google Patents

Description

  The present invention relates to a refrigerator provided with a vacuum heat insulating material.

  In recent years, various efforts have been made for resource saving, energy saving, and particularly power saving from the viewpoint of global environmental protection and safety of nuclear power plants.

  In refrigerators, in addition to energy saving, a large capacity for food storage space is required. In addition to rigid urethane foam, which is a conventional foam insulation, vacuum insulation that has low thermal conductivity and can greatly improve insulation performance. It is important to have a large area, thickness, and thickness of vacuum insulation material.

  In particular, when a storage case for assembling a substrate is arranged near the refrigerator ceiling, the shape of the wall is complicated, and if a flat vacuum heat insulating material is arranged, the area covered with the vacuum heat insulating material becomes small. Therefore, a wider area can be covered with one vacuum heat insulating material by bending and arranging the vacuum heat insulating material (see, for example, Patent Document 1 or 2).

  Also, at this time, the heat sink pipe is placed in the outer box, and the vacuum heat insulating material is arranged between the outer box and the inner box, so that the condensation capacity of the refrigerator is improved and the heat radiation from the heat sink pipe is Therefore, it is possible to efficiently dissipate heat (see, for example, Patent Document 1).

JP 2009-228917 A JP 2011-38713 A

  In recent years, energy saving thinking has increased, and in order to further reduce the amount of power consumption of the refrigerator, it is required to improve the heat insulating performance, that is, to apply more vacuum heat insulating material superior in heat insulation than hard urethane foam, and thicker.

  On the other hand, in the refrigerator described in Patent Document 1 or 2, a vacuum heat insulating material is fixed not to the inner box side but to the outer box side in order to avoid an interior light provided on the ceiling surface of the inner box. That is, in the refrigerator described in Patent Document 1, the vacuum heat insulating material is fixed to the outer box by interposing a sheet of polyethylene foam between the ceiling surface of the outer box and the vacuum heat insulating material. Moreover, in the refrigerator of patent document 2, the vacuum heat insulating material is being fixed to the outer box by interposing a spacer between the ceiling surface of the outer box and the vacuum heat insulating material.

  However, in the refrigerator described in Patent Document 1 or 2, since the polyethylene foam sheet or the spacer is interposed between the outer box and the vacuum heat insulating material, the vacuum heat insulating material needs to be thinned by the thickness, and the heat insulating performance is reduced. There is a possibility that it cannot be secured sufficiently. Moreover, in the refrigerator described in Patent Document 1, since the polyethylene foam sheet has a higher thermal conductivity than the hard urethane foam, it may be more difficult to ensure the heat insulating performance.

  The present invention has been made in view of the above, and in a refrigerator in which an interior lamp is disposed on the ceiling of the inner box and a storage case and a heat radiating pipe are disposed on the outer box, sufficient heat insulation performance can be ensured. The object is to provide a possible refrigerator.

In order to solve the above-described problems and achieve the object, a refrigerator according to the present invention includes a plurality of vacuum heat insulating materials disposed in a space formed between an outer box and an inner box, and a foam heat insulating material. Is provided in the upper part of the back surface of the outer box, the storage case storing the control board, and the ceiling of the inner box, and the inside of the concave depression as viewed from the inner side of the inner box The inner lamp that is disposed between the storage case and the inner lamp, the heat radiation pipe that is fixed to the inner ceiling surface of the outer box, and the bottom portion of the recess Covering from the outside the recess in which the interior lamp is disposed by being in contact with the ceiling surface of the outside of the box, and bent at the edge of the storage case side of the recess along the recess, the recess and the storage The case is fixed in contact with the outer ceiling surface of the inner box and the heat dissipation Covering the type from the inside, are arranged further above is bent along the housing case in contact with the outer surface of the inner box formed in response to the storage case, one vacuum covering the housing case from the inside A heat insulating material , wherein the one vacuum heat insulating material is a portion of the inner box and the outer box other than the portion fixed to the outer ceiling surface of the inner box between the recess and the storage case. It is characterized by not being fixed to either .

  Advantageous Effects of Invention According to the present invention, there is an effect that it is possible to ensure sufficient heat insulation performance in a refrigerator in which an interior lamp is disposed on the ceiling of the inner box and a storage case and a heat radiating pipe are disposed on the outer box.

1 is a front view showing a configuration of a refrigerator according to Embodiment 1. FIG. FIG. 2 is a cross-sectional view taken along the line AA of FIG. FIG. 3 is a rear perspective view of the outer box of the refrigerator. FIG. 4 is an enlarged view of the ceiling portion of FIG. FIG. 5 is a schematic diagram showing the configuration of the vacuum heat insulating material. FIG. 6 is an enlarged view of the ceiling portion of the refrigerator in the second embodiment.

  Embodiments of a refrigerator according to the present invention will be described below in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

Embodiment 1 FIG.
1 is a front view showing the configuration of the refrigerator according to the present embodiment, FIG. 2 is a cross-sectional view taken along the line AA of FIG. 1, and FIG. 3 is a rear perspective view of the outer box of the refrigerator. FIG. 4 is an enlarged view of the ceiling portion of FIG.

  As shown in FIGS. 1 to 4, the refrigerator 1 includes a metal outer box 2 and a resin inner box 3. The outer box 2 includes a ceiling surface, a bottom surface, both side surfaces, and a back surface. Similarly, the inner box 3 includes a ceiling surface, a bottom surface, both side surfaces, and a back surface. 2 and 4, the thicknesses of the outer box 2 and the inner box 3 are not shown. In addition, a plurality of vacuum heat insulating materials 5a and 5b are disposed in a space formed between the outer box 2 and the inner box 3, and are further filled with a hard urethane foam 4 which is a foam heat insulating material. 2 shows a vacuum heat insulating material 5a fixed to the ceiling surface of the inner box 3 and a vacuum heat insulating material 5b fixed to the back surface of the outer box 2. Hereinafter, the vacuum heat insulating materials 5a and 5b are collectively referred to as “vacuum heat insulating material 5”.

  The refrigerator 1 is divided into a refrigerator compartment 6, a freezer compartment 7, a vegetable compartment 8, and a machine room 9. A concave depression 10 is provided on the inner ceiling of the inner box 3 as viewed from the inside of the refrigerator compartment 6, and an interior lamp 11 is disposed in the depression 10, and the inner box 3 is covered so as to cover the interior lamp 11. A cover 31 is attached. The interior lamp 11 is disposed on the door side of the refrigerator 1 (the front side of the inner box 3).

  In addition, a storage case 13 for storing a control board 12 for controlling the operation of the refrigerator 1 is provided at the upper back of the outer box 2 and at the rear of the ceiling surface. Specifically, a concave portion 30 having an inclined surface that sinks rearward is provided at the rear portion of the ceiling surface of the outer box 2 (FIG. 3), and a triangular prism-shaped storage case 13 is disposed so as to fill the concave portion 30. (FIG. 2). The control board 12 is arrange | positioned so that it may incline with respect to both the ceiling surface and the back surface of the outer case 2, for example. In addition, the shape of the recessed part 30 and the storage case 13, and the arrangement | positioning aspect of the control board 12 are not limited to the example of illustration.

  Further, as an element constituting the refrigeration cycle, a compressor 14 is disposed in the machine room 9, a cooler 15 is disposed on the back side of the freezer room 7, and the side, back, and ceiling of the outer box 2 are externally provided. A heat radiating pipe 16 for releasing heat is provided, and the refrigerant flows through these pipes, whereby the refrigerator compartment 6, the freezer compartment 7, and the vegetable compartment 8 are cooled. In FIG. 2, the cross sections of the heat radiating pipes 16 connected to each other are shown in two places.

  At this time, by disposing more heat radiating pipes 16, the amount of heat radiated from the heat radiating pipes 16 is increased, so that the energy of the refrigerant can be reduced and the temperature of the cooler 15 can be lowered. Thus, the inside of the refrigerator 1 can be cooled.

  In the manufacture of the refrigerator 1, the vacuum heat insulating material 5 is fixed to the outer box 2 or the inner box 3 in advance, and the urethane injection provided on the back side is provided with the back side of the refrigerator 1 facing upward as shown in FIG. 3. By injecting the raw material of the liquid rigid urethane foam 4 from the inlet 17 and carrying out integral foaming, the space formed by the outer box 2 and the inner box 3 can be filled with the rigid urethane foam 4, such as rails. The gap can not be filled with the vacuum heat insulating material can be filled with the heat insulating material.

  Here, since the heat conductivity of the vacuum heat insulating material 5 is 0.0015 to 0.003 W / mK while the heat conductivity of the rigid urethane foam 4 is 0.018 to 0.025 W / mK, the vacuum heat insulating material 5 By mounting more, it is possible to provide the refrigerator 1 with more excellent heat insulation performance.

  As shown in FIG. 4, the heat radiating pipe 16 is disposed between the interior lamp 11 and the storage case 13 and is fixed to the ceiling surface inside the outer box 2. The heat radiating pipe 16 can be directly fixed to the ceiling surface by, for example, aluminum tape.

  Between the ceiling surface on the inner side of the outer box 2 and the ceiling surface on the outer side of the inner box 3, a single plate-like vacuum heat insulating material 5 a having a substantially constant thickness is disposed. The vacuum heat insulating material 5a is arrange | positioned along the ceiling surface of the inner box 3 toward the back side from the front side of the refrigerator 1. As shown in FIG.

  Specifically, the vacuum heat insulating material 5 a covers the recess 10 in which the interior lamp 11 is disposed from the outside, covers the heat radiating pipe 16 fixed to the ceiling surface inside the outer box 2 from the inside, and the control board 12. Is disposed so as to cover the storage case 13 including That is, when the interior light 11 is viewed from the direction perpendicular to the ceiling surface of the outer box 2 from the exterior to the interior, the recess 10 in which the interior lamp 11 is disposed is formed by the vacuum heat insulating material 5a. The heat radiating pipe 16 is covered with the vacuum heat insulating material 5a when the heat radiating pipe 16 is viewed from a direction perpendicular to the ceiling surface of the outer box 2 from the inside to the outside of the box. The storage case 13 including the control board 12 is covered with the vacuum heat insulating material 5a when viewed in a plan view from the direction perpendicular to the control board 12 from the inside to the outside of the room.

  The vacuum heat insulating material 5 a is in contact with the outer ceiling surface of the inner box 3 constituting the bottom surface portion of the recess 10, and is bent along the recess 10 at the edge portion of the recess 10 on the storage case 13 side. Is in contact with the outer ceiling surface of the inner box 3, is further bent along the storage case 13, and is disposed in contact with the outer surface of the inner box 3 formed according to the storage case 13. In addition, the vacuum heat insulating material 5a is extended by a certain length on the front side with a space substantially equal to the depth of the depression 10 between the vacuum insulation 5a and the ceiling surface outside the inner box 3 on the front side. ing.

  Further, the vacuum heat insulating material 5 a is fixed to the ceiling surface outside the inner box 3 on a flat surface between the recess 10 and the storage case 13. In FIG. 4, the fixing range of the vacuum heat insulating material 5 a to the inner box 3 is indicated by A. The vacuum heat insulating material 5a is fixed to the inner box 3 by double-sided tape or hot melt, for example. In the fixed range A, the space | interval which can arrange | position the thermal radiation pipe 16 is ensured between the ceiling surface inside the outer case 2, and the vacuum heat insulating material 5a. Note that the vacuum heat insulating material 5 a is not fixed to either the inner box 3 or the outer box 2 at a place other than the fixing range A.

  In the illustrated example, the vacuum heat insulating material 5a has three bent portions. That is, the vacuum heat insulating material 5a is first bent from the front side to the back side in order at the edge of the recess 10 on the storage case 13 side in order at the inner box 3 side and the outer box 2 side in two places, and then stored. It is bent to the inner box 3 side before the case 13.

  The effect of this Embodiment is demonstrated. In the present embodiment, the heat radiating pipe 16 and the control board 12 fixed to the ceiling surface inside the outer box 2 are covered with the vacuum heat insulating material 5a in plan view. In this way, by disposing the vacuum heat insulating material 5a so as to cover the control board 12 and the heat radiating pipe 16 serving as a heat radiating source, the heat released from the control board 12 and the heat radiating pipe 16 can enter the chamber. Since it can prevent, the heat insulation performance of the refrigerator 1 can be improved.

  Here, when the heat radiation pipe 16 and the control board 12 fixed to the ceiling of the outer box 2 are covered with the vacuum heat insulating material 5a, the vacuum heat insulating material 5a is divided into two pieces, one covering the heat radiation pipe 16 and the other covering the control board 12. It is conceivable to divide and arrange them, but if this is done, a gap is generated between the two vacuum heat insulating materials, and the amount of heat penetration increases, so that the heat insulating performance decreases.

  Therefore, in the present embodiment, by simultaneously covering both the heat radiating pipe 16 and the control board 12 with one vacuum heat insulating material 5a bent along the storage case 13 as shown in FIG. In addition, the increase in cost due to the increase in the number of vacuum heat insulating materials to two can be suppressed.

  Moreover, in this Embodiment, the hollow 10 in which the interior lamp | ramp 11 is arrange | positioned is also covered simultaneously with the single vacuum heat insulating material 5a. Thus, the heat insulation performance of the refrigerator 1 can be improved more efficiently by simultaneously covering the depression 10 of the interior lamp 11 where the heat insulation thickness is thinner and the heat flow rate is larger than other places.

  Here, since the heat radiating pipe 16 is fixed to the outer box 2 and the interior lamp 11 is fixed to the inner box 3, the location of the outer box 2 is larger than the diameter of the heat radiating pipe 16 at the location where the heat radiating pipe 16 is disposed. It is necessary to secure a space between the inner ceiling surface and the vacuum heat insulating material 5a, and conversely, at the place where the interior lamp 11 is disposed, the outer ceiling surface of the inner box 3 is more than the depth of the recess 10. And a space between the vacuum heat insulating material 5a must be ensured.

  Therefore, in the present embodiment, as shown in FIG. 4, the vacuum heat insulating material 5a is bent along the internal light 11 and fixed to the inner box 3, so that the internal light 11 is formed by one vacuum heat insulating material 5a. It is possible to simultaneously cover the recess 10 and the heat radiating pipe 16 arranged.

  Further, in the present embodiment, the vacuum heat insulating material 5a is fixed to the inner box 3, whereas in the refrigerator described in Patent Document 1 or 2, the vacuum heat insulating material has polyethylene foam or spacers on the ceiling of the outer box. Is fixed through. When polyethylene foam or a spacer is used for fixing the vacuum heat insulating material, there is a possibility that the thickness of the vacuum heat insulating material may be limited by the length, but in this embodiment, the vacuum heat insulating material 5a Since it is not necessary to use a polyethylene foam or a spacer for fixing to the box 3, it is not necessary to make the vacuum heat insulating material 5a thin due to the influence of the polyethylene foam or the spacer, and the heat insulating performance can be further improved.

  In addition, if the vacuum heat insulating material 5a is fixed to the outer box 2 directly or via a spacer or the like before filling with the rigid urethane foam 4, the vacuum heat insulating material 5a is removed from the outer box 2 during the assembly when the adhesion is insufficient. There is a concern of peeling off and falling, and in particular, when the vacuum heat insulating material 5a is bent, the area that can be bonded with hot melt or double-sided tape becomes smaller, so the possibility of dropping increases. On the other hand, in this embodiment, since the vacuum heat insulating material 5a is fixed to the inner box 3, there is no fear of the vacuum heat insulating material 5a dropping in the first place.

  Here, the structure of the vacuum heat insulating material 5 is demonstrated. FIG. 5 is a schematic diagram showing the configuration of the vacuum heat insulating material. As shown in FIG. 5, the vacuum heat insulating material 5 is made of a plurality of layers such as nylon as a protective layer, polyethylene terephthalate or ethylene vinyl alcohol on which aluminum foil or aluminum as a gas barrier layer is deposited, and polyethylene as a seal layer. A core material 19 such as glass wool that keeps the shape of the vacuum heat insulating material 5 and a gas adsorbent 20 such as calcium oxide that adsorbs a gas such as water vapor are inserted into a bag made of the laminated film 18 that is configured. The inside is decompressed to 5 Pa or less and sealed.

  In general, in a conventional refrigerator, the aluminum foil used as a gas barrier layer or the polyethylene terephthalate or ethylene vinyl alcohol layer on which aluminum is deposited contains a metal and thus has a high thermal conductivity. In other words, a heat bridge phenomenon occurs in which heat travels through the laminate film 18.

  On the other hand, in the refrigerator 1 according to the present embodiment, since the vacuum heat insulating material 5a is attached to the inner box 3, the distance between the heat insulating control board 12 or the heat radiating pipe 16 and the vacuum heat insulating material 5a is increased. The amount of heat reaching the laminate film 18 is reduced, the heat bridge phenomenon is suppressed, and the heat insulation performance can be further improved.

  As described above, according to the present embodiment, in the refrigerator 1 in which the interior lamp 11 is disposed on the ceiling of the inner box 3 and the storage case 13 and the heat radiating pipe 16 are disposed in the outer box 2, sufficient heat insulating performance is achieved. Can be secured.

Embodiment 2. FIG.
FIG. 6 is an enlarged view of the ceiling portion of the refrigerator in the present embodiment. In FIG. 6, the same components as those shown in FIG. 4 are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 6, the vacuum heat insulating material 5 a is in contact with the ceiling surface inside the outer box 2 on the front side of the refrigerator 1 from the bent portion at the edge of the recess 10 on the storage case 13 side. In FIG. 6, this contact range is indicated by B.

  That is, the thickness of the vacuum heat insulating material 5a is equal to the distance between the ceiling surface on the outer side of the inner box 3 constituting the bottom surface portion of the recess 10 and the ceiling surface on the inner side of the outer box 2 facing the inner wall. The material 5 a is in contact with both the outer box 2 and the inner box 3 at the position where the recess 10 is disposed.

  Further, the vacuum heat insulating material 5 a is not fixed to either the outer box 2 or the inner box 3 except the fixing range A. In the fixed range A, the vacuum heat insulating material 5a is bonded to the inner box 3 by, for example, a double-sided tape or hot melt. Other configurations of the present embodiment are the same as those of the first embodiment.

  In the present embodiment, the vacuum heat insulating material 5 a is in contact with both the ceiling surface on the outer side of the inner box 3 and the ceiling surface on the inner side of the outer box 2 constituting the bottom surface portion of the recess 10 at the position where the recess 10 is disposed. Therefore, compared with FIG. 4 of Embodiment 1, the thickness of the vacuum heat insulating material 5a is increased as much as possible. According to such a configuration, since the thermal conductivity of the rigid urethane foam 4 is 0.018 to 0.025 W / mK, the thermal conductivity of the vacuum heat insulating material 5 is 0.0015 to 0.003 W / mK. The heat insulation performance can be further improved.

  Further, in the present embodiment, the vacuum heat insulating material 5 a is in contact with the outer box 2 and the inner box 3 on the front side of the refrigerator 1 with respect to the recess 10 and is not fixed to either. For example, if the vacuum heat insulating material 5 and the outer box 2 or the inner box 3 are not bonded to each other on the side surface, there is a possibility that the strength of the box cannot be sufficiently secured. Even if the inner box 3 is not bonded, there is no influence on the strength of the box.

  Further, by not adhering the vacuum heat insulating material 5a to both the recess 10 portion of the inner box 3 and the outer box 2, even if the bending position and the bending angle of the vacuum heat insulating material 5a vary, the fixing range A of the inner box 3 can be ensured. Can be glued. Thereby, since the vacuum heat insulating material 5a can be stably moved away from the control board 12 or the heat radiating pipe 16 which is a heat source, the amount of heat reaching the laminate film 18 is reduced, the heat bridge phenomenon is suppressed, and the heat insulating performance is further improved. Can be made.

  Moreover, there is no functional problem even if the hard urethane foam 4 is spread between the vacuum heat insulating material 5a and the outer box 2 and between the vacuum heat insulating material 5a and the recess 10 portion of the inner box 3.

  In addition, in this Embodiment, compared with FIG. 4 of Embodiment 1, it demonstrated that the thermal insulation performance could be improved further by increasing the thickness of the vacuum heat insulating material 5a as much as possible. However, in FIG. 4 of Embodiment 1, when sufficient heat insulation performance of the refrigerator 1 has already been obtained, the size of the inner box 3 is increased without changing the thickness of the vacuum heat insulating material 5a. It can also be as shown in FIG. In this case, the capacity | capacitance of the refrigerator 1 can be increased, ensuring the heat insulation performance.

  The present invention is useful as a refrigerator.

  DESCRIPTION OF SYMBOLS 1 Refrigerator, 2 Outer box, 3 Inner box, 4 Hard urethane foam, 5, 5a, 5b Vacuum heat insulating material, 6 Refrigeration room, 7 Freezing room, 8 Vegetable room, 9 Machine room, 10 Recess, 11 Interior light, 12 Control board, 13 storage case, 14 compressor, 15 cooler, 16 heat radiating pipe, 17 urethane inlet, 18 laminate film, 19 core material, 20 gas adsorbent, 30 recess, 31 cover.

Claims (4)

A refrigerator in which a plurality of vacuum heat insulating materials are arranged in a space formed between an outer box and an inner box and filled with a foam heat insulating material,
A storage case provided at the upper back of the outer box and storing a control board;
An interior lamp provided on the ceiling of the inner box and disposed in a concave depression as seen from the inside of the inner box ,
A heat dissipating pipe disposed between the storage case and the interior lamp, and fixed to a ceiling surface inside the outer box,
Covering from the outside the recess, which is disposed in contact with the outer ceiling surface of the inner box constituting the bottom surface of the recess and the interior lamp is disposed, and at the edge of the recess on the storage case side, the recess And bent between the recess and the storage case so as to be in contact with and fixed to the outer ceiling surface of the inner box to cover the heat radiating pipe from the inside, and further bent along the storage case. A vacuum heat insulating material that is arranged in contact with the outer surface of the inner box and covers the storage case from the inside;
With
The one vacuum heat insulating material is not fixed to either the inner box or the outer box, except for a portion fixed to the ceiling surface outside the inner box between the recess and the storage case. A refrigerator characterized by that. The one vacuum heat insulating material is extended to the front side with a certain distance from the ceiling surface on the outer side of the inner box at a distance equal to the depth of the depression on the front side from the depression. The refrigerator according to claim 1.   The one piece of vacuum heat insulating material is bent at two locations in order from the front side to the back side of the refrigerator at the inner case side and the outer box side at the edge of the recess on the storage case side. The refrigerator according to claim 1 or 2, wherein the refrigerator is bent toward the inner box before the case.   The one vacuum heat insulating material is in contact with both the ceiling surface on the outer side of the inner box and the ceiling surface on the inner side of the outer box constituting the bottom surface portion of the depression at the position where the depression is disposed. The refrigerator according to any one of claims 1 to 3.

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