JP2004333124A - Refrigerator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a refrigerator using vacuum heat insulation material, in which appearance of outer surfaces where the vacuum heat insulation material is applied is improved. <P>SOLUTION: A plurality of pores 78 are linearly provided in a case 62 to correspond to parts where the vacuum heat insulation material is disposed. Gas in cavity parts between the vacuum heat insulation material 65 and the case 62 as causes for deformation of the case due to surface unevenness, warping, etc., in the vacuum heat insulation material 65 is smoothly discharged through the pores 78 outward. Expansion or contraction in the cavity parts due to change of peripheral temperature is prevented, thereby deformation of the outer surfaces of the case 62 is prevented where the vacuum heat insulation material 65 is disposed. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

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

  In recent years, there has been a method of using a vacuum insulation material having high heat insulation performance as a means of improving the heat insulation performance of a refrigerator in order to save energy and space of the refrigerator. It is urgently necessary to improve the heat insulating performance by maximizing the use of a vacuum heat insulating material having a heat insulating performance several to ten times that of the foam within an appropriate range. On the other hand, when vacuum insulation is applied to the heat insulation box of a refrigerator with multiple layers of hard urethane foam, there is a problem that the appearance of the heat insulation box is deformed due to the difference in the shrinkage ratio between the hard urethane foam and the vacuum insulation. Had. As means for solving the above-mentioned problems, there is known one described in Patent Document 1.

  Hereinafter, the conventional refrigerator will be described with reference to the drawings.

  FIG. 24 is a sectional view of a door arranged at a front opening of a conventional refrigerator, and FIG. 25 is an enlarged view of a portion A in FIG.

5 and 6, reference numeral 1 denotes a metal outer plate, 2 denotes a synthetic resin door frame, 3 denotes a synthetic resin inner box, 4 denotes a foamed heat insulating material, and 5 denotes a vacuum heat insulating material. Reference numeral 6 denotes a release paper inserted between the vacuum heat insulating material 5 and the outer plate 1, and is formed larger than the vacuum heat insulating material 5. Therefore, since the vacuum heat insulating material 5 is located on the inner surface of the outer plate 1 via the release paper 6, the foam heat insulating material 4 contracts after the foam heat insulating material 4 is foamed. By forming a gap x between the outer plate 1 and the release paper 6, the deformation of the outer plate 1 is prevented.
Japanese Utility Model Publication No. 61-141690

  However, in the refrigerator described in the above-mentioned conventional example, although the appearance deformation of the outer plate can be prevented, a gap is generated between the outer plate and the foamed heat insulating material, so that the user may touch it. However, there is a problem that the tactile sensation is deteriorated due to sticking of the outer plate.

  The present invention has been made in view of the above circumstances, and provides a refrigerator that has good external appearance and does not impair tactile sensation even when a vacuum heat insulating material is used.

  In order to solve the above-mentioned problem, a refrigerator according to the present invention is a refrigerator including a rigid urethane foam and a vacuum heat insulating material between an outer box and an inner box, wherein the vacuum heat insulating material is provided in the outer box, and the vacuum heat insulating material is provided. The pores that expand and contract due to the temperature change of the voids generated between the material and the outer box and release the gas that causes the appearance deformation to the outside of the refrigerator correspond only to the arrangement portion of the vacuum heat insulating material. It is provided on the outer surface of the outer box.

  According to the present invention, since the gas in the gap between the vacuum heat insulating material and the outer box is smoothly discharged through the pores to the outside of the chamber, expansion and contraction of the gap due to a change in ambient temperature do not occur, and the vacuum Deformation of the outer surface of the outer box of the heat insulating material placement portion can be prevented.

  ADVANTAGE OF THE INVENTION According to the refrigerator of this invention, expansion and contraction of the foaming gas which accumulates in the space | gap between the arrangement | positioning part of a vacuum heat insulating material and an outer case by the change of an ambient temperature do not generate | occur | produce, and the outer surface of the outer case of a vacuum heat insulating material mounting part does not occur. Can be prevented from being deformed.

  The invention according to claim 1 of the present invention is directed to a refrigerator including a rigid urethane foam and a vacuum heat insulator between an outer box and an inner box, wherein the vacuum heat insulator is disposed in the outer box, and the vacuum heat insulator is provided. The pores, which expand and contract due to the temperature change of the gap generated between the outer case and the outer box and release the gas which is a factor of external deformation to the outside of the refrigerator, correspond to only the portion where the vacuum heat insulating material is provided. It is provided on the outer surface of the box.

  According to the present invention, since the gas in the gap between the vacuum heat insulating material and the outer box is smoothly discharged through the pores to the outside of the chamber, expansion and contraction of the gap due to a change in ambient temperature do not occur, and the vacuum Deformation of the outer surface of the outer box of the heat insulating material placement portion can be prevented.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, about the same structure as a conventional one, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted. The present invention is not limited by the embodiment.

(Embodiment 1)
FIG. 1 is a front view of a refrigerator according to a first embodiment of the present invention, FIG. 2 is a side sectional view of the refrigerator of the embodiment, FIG. 3 is a front sectional view of the refrigerator of the embodiment, and FIG. It is a principal part expanded sectional view of the refrigerator of the form.

  In the figure, reference numeral 10 denotes a refrigerator body, in which a space formed by an inner box 11 made of a synthetic resin such as ABS and an outer box 12 made of a metal such as an iron plate is filled with rigid urethane foam 13. Numeral 14 denotes a heat insulating partition wall, in which a refrigerator compartment 15 and a vegetable compartment 16 are formed above the heat insulating partition wall 14, and a switching room 17, an ice making room 18 and a freezing room 19 are formed below. Reference numeral 20 denotes a machine room arranged below the rear part of the refrigerator main body 10 and inside which a compressor 21 is arranged. 22 is a refrigeration cooler, 23 is a refrigeration blower, 24 is a refrigeration cooler, 25 is a refrigeration blower, and 26 is a condenser provided on the bottom of the refrigerator main body 10.

  At the front opening of the refrigerator body 10, a hinge-type refrigerator compartment door 27 that pivots around one end, a drawer-type vegetable compartment door 28, a switching compartment door 29, an ice making compartment door 30, a freezer compartment, respectively. A door 31 is provided. Reference numerals 32, 33, 34, 35, 36, 37, 38, 39, 40, 41 denote vacuum heat insulators, which together with the rigid urethane foam 13 constitute the refrigerator body 10.

  Here, the vacuum heat insulating materials 32, 33, 34, and 36 are attached in contact with the top surface, the back surface, the side surface, and the inside of the machine room constituting surface of the outer box 11, respectively. The vacuum heat insulating material 35 is attached in contact with the bottom surface of the inner box 12. Further, the vacuum heat insulating material 37 is provided in the heat insulating partition wall 14.

  Further, inside the hinge-type refrigerator compartment door 27 disposed at the front opening of the refrigerator body 10, a vacuum heat insulating material 38 is provided so as to be in contact with the inner box, and the drawer-type vegetable compartment door 28 and the switching compartment door 29 are provided. Inside the freezer compartment door 31, vacuum heat insulators 39, 40, and 41 are respectively disposed so as to be located between the outer iron plate and the inner box of each door.

  The thickness of the heat insulating wall of the heat insulating box formed of the rigid urethane foam 13 and the vacuum heat insulating materials 33, 34, 35, and 36 surrounding the freezing room 19 and the switching room 17 in the freezing area is the wall of the opening except the door. A heat insulating wall of a heat insulating box formed of hard urethane foam 13 and vacuum heat insulating materials 32, 33, 34 surrounding a refrigerator room 15 and a vegetable room 16 in a refrigerator region in a distribution of 25 to 50 mm including a thin portion. The thickness has a distribution of 25 to 40 mm excluding the door and including the thin wall portion of the opening.

  As described above, due to the configuration in which the vacuum heat insulating material is disposed on both sides, the top surface, the back surface, the bottom surface, and the front surface of the refrigerator body 10, the coverage of the vacuum heat insulating material with respect to the surface area of the outer box is 50%. Over 80%.

  The reason why the covering rate of the vacuum heat insulating material is set to be more than 50% and equal to or less than 80% is that when a large amount of the vacuum heat insulating material is provided and the covering rate is to be increased to the maximum, components not shown in the refrigerator main body 10 or special In a portion having a structure (such as an uneven shape, a pipe, and a drain pipe installation portion), a special form of vacuum heat insulating material is required, or the workability of attaching the vacuum heat insulating material becomes extremely poor.

  For this reason, even if it is attempted to dispose the vacuum heat insulating material over approximately 80% of the surface area of the outer box 11, the above-mentioned use efficiency will be poor and the use value will be saturated. The effect of improving the heat insulation performance is significantly reduced.

  Therefore, the effect of using a large amount of vacuum heat insulating material does not saturate and the utility value is reduced by limiting the coverage of the vacuum heat insulating material to the surface area of the outer box 11 to 80% as in the present embodiment. In a high state, the heat absorption load can be effectively suppressed, and the energy saving effect can be enhanced.

  The 80% coverage is achieved by providing a large-sized vacuum heat insulating material that can cover almost all of the sides, top, back, bottom, and front surfaces of the heat insulation box. Can be realized well.

  For this reason, the use of this heat-insulating box does not cause the investment effect to be significantly reduced due to the use of a non-standard form of vacuum heat-insulating material and the work of disposing the heat-insulating box at a portion where the work efficiency is low. The value as the life cycle cost can be increased without breaking the balance between the increase in the initial cost and the reduction in the running cost due to energy saving.

  Further, if the surface area of the outer box 12 exceeds about 50% by arranging from the place where the passing heat gradient is large inside and outside the heat insulating box, the heat absorption load of the heat insulating box can be effectively suppressed. Energy saving effect.

  In FIG. 4, reference numeral 78 denotes pores previously arranged on the outer surface of the outer box 62 by a press or the like. Are provided.

  In the above configuration, the gas in the gap between the vacuum heat insulating material 65 and the outer case 62, which is a factor of deformation of the outer case due to unevenness and warpage of the surface of the vacuum heat insulator 65, is smoothly discharged to the outside through the pores 78. Therefore, expansion and contraction of the gap due to a change in ambient temperature do not occur, and deformation of the outer surface of the outer box 62 of the portion where the vacuum heat insulating material 65 is provided can be prevented.

  The arrangement of the pores 78 is not limited to a straight line, but may be a curved line or a polygonal line.

  INDUSTRIAL APPLICABILITY As described above, the refrigerator according to the present invention can visually reduce the appearance deformation of the outer box surface, and is effective in maintaining the appearance quality of equipment having a heat insulating box using a vacuum heat insulating material.

Front view of refrigerator according to Embodiment 1 of the present invention Side sectional view of the refrigerator of the embodiment Front sectional view of the refrigerator of the embodiment Main part enlarged sectional view of the refrigerator of the embodiment Sectional view of a door arranged at the front opening of a conventional refrigerator Part A enlarged view of FIG.

Explanation of reference numerals

DESCRIPTION OF SYMBOLS 10 Refrigerator 11 Inner box 12, 62 Outer box 13, 75 Hard urethane foam 27 Refrigerator room door 28 Vegetable room door 29 Switching room door 30 Ice making room door 31 Freezing room door 32, 33, 34, 35, 36 , 37, 38, 38a, 38b, 39, 40, 41, 65 Vacuum insulation 78 pores

Claims (1)

In a refrigerator provided with a rigid urethane foam and a vacuum heat insulating material between an outer case and an inner case, the vacuum heat insulator is disposed in the outer case, and a void formed between the vacuum heat insulator and the outer case is formed. Refrigerator characterized in that pores are provided on the outer surface of the outer box, corresponding to only the portion where the vacuum heat insulating material is provided, for releasing gas, which expands and contracts due to a temperature change and causes a change in appearance, to the outside of the refrigerator. .

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