JP2018168949A - Vacuum heat insulation housing and refrigerator - Google Patents

Abstract

To provide a vacuum heat insulation housing capable of improving productivity and maintaining heat insulation performance for a long period of time.SOLUTION: A vacuum heat insulation housing includes an outer plate 3a, an inner plate 3c, and a vacuum heat insulation body 3b disposed inside the outer plate 3a and the inner plate 3c. The vacuum heat insulation body 3b is provided with a core material 3bc and an adsorbing member 3bb in its inner part. The adsorbing member 3bb is disposed on the high-temperature side of the vacuum heat insulation body 3b and is structured to vacuum-seal the inner part thereof with a seal member 3ba and a base member 3bd, so that the adsorbing member 3bb disposed on the core material inside the vacuum heat insulation body is disposed on the outer plate side (high-temperature side) of the core material, and thereby a refrigeration chamber door 3 is made to have a high adsorption rate due to the adsorption rate of the adsorbing member 3bb and an environmental temperature feature, and the degree of vacuum in the vacuum heat insulation body can be maintained for a long period of time in a condition where the refrigerator is assembled and operated.SELECTED DRAWING: Figure 12

Description

  The present invention relates to a vacuum heat insulating housing used for a refrigerator or the like.

In recent years, there has been an active movement to promote energy saving as a countermeasure against global warming, which is a global environmental problem, and the performance of heat insulation technology is expected to evolve. Conventionally, as shown in FIGS. 16 and 17, this type of heat insulation technology is provided in contact with the vacuum heat insulation panel 34 provided in the space inside the door frame 30 and the side surface of the door frame 30. Further, a technique has been proposed in which the heat insulation performance is improved by using the structure having the reinforcing member 35. In addition, the vacuum heat insulation panel 34 means the structure which improved the heat insulation performance by making the inside of a plate-shaped container into a vacuum (for example, refer patent document 1).

JP 2013-119966 A

  However, in the above-described conventional configuration, only the structure having the vacuum heat insulation panel 34 and the reinforcing member 35 provided in contact with the side surface of the door frame body 30 in the space inside the door frame body 30 is disclosed, and is generated inside the vacuum panel 34. There is no consideration for air, water, gas, or air, water, or gas entering from the outside, and the internal vacuum cannot be maintained for a long period of time.

  The present invention solves the above-described conventional problems, and an object of the present invention is to provide a vacuum heat insulating casing capable of improving productivity and keeping heat insulating performance for a long time.

  In order to solve the above-described conventional problems, the vacuum heat insulating housing of the present invention includes an outer plate, an inner plate, and a vacuum heat insulating body disposed inside the outer plate and the inner plate. The vacuum heat insulating body includes a core material and an adsorbing member inside, and the adsorbing member is disposed on a high temperature side of the vacuum heat insulating body and has a structure in which the inside is vacuum-sealed with a seal member and a base member. .

  Thereby, since the adsorption member arranged on the core material in the vacuum heat insulating body is arranged on the outer plate side (high temperature side) of the core material, the vacuum heat insulating casing (door body) From the environmental temperature characteristics, the adsorption rate can be increased, the refrigerator can be assembled, and the degree of vacuum in the vacuum insulation body can be maintained for a long period of time while the refrigerator is operated.

  Since the vacuum heat insulation housing | casing (door body) of this invention can maintain the vacuum degree in a vacuum heat insulation body over a long term in the state which drive | operated the refrigerator, a highly reliable refrigerator can be provided.

The perspective view of the refrigerator provided with the vacuum heat insulation housing | casing in Embodiment 1 of this invention. The perspective view of the refrigerator compartment door provided with the vacuum heat insulation housing | casing in Embodiment 1 of this invention. Sectional drawing of the refrigerator compartment door provided with the vacuum heat insulation housing | casing in Embodiment 1 of this invention. Section A enlarged sectional view of FIG. 3 in Embodiment 1 of the present invention Exploded view of parts of refrigerator compartment door according to Embodiment 1 of the present invention Section B enlarged sectional view of FIG. 5 in Embodiment 1 of the present invention Sectional drawing of the vacuum heat insulating body in Embodiment 1 of this invention Section C enlarged sectional view of FIG. 7 in Embodiment 1 of the present invention Exploded view of parts of vacuum insulator in embodiment 1 of the present invention Section D enlarged sectional view of FIG. 9 in Embodiment 1 of the present invention The perspective view of the core material and reinforcement member of the vacuum heat insulation housing | casing in Embodiment 1 of this invention The perspective view of the core material and adsorption member of the vacuum heat insulation housing | casing in Embodiment 2 of this invention The relationship diagram of the environmental temperature and adsorption speed of the adsorption member arrange | positioned at the core material of the vacuum heat insulation housing | casing in Embodiment 2 of this invention Foaming mold diagram of core material of vacuum heat insulating casing in Embodiment 3 of the present invention Foaming mold exploded view of the core material of the vacuum heat insulating casing in Embodiment 3 of the present invention Exploded view of conventional vacuum insulation housing parts Sectional view of a conventional vacuum insulation housing

  1st invention is equipped with the outer plate | board, the inner plate | board, the said outer plate, and the vacuum heat insulating body arrange | positioned inside the said inner plate, and the said vacuum heat insulating body has a core material and an adsorption | suction member inside. The suction member is arranged on the high temperature side of the vacuum heat insulator, and the inside of the vacuum heat insulator is vacuum-sealed with a seal member and a base member. Because it is arranged on the outer plate side (high temperature side) of the core material, the vacuum heat insulating housing (door body) can increase the adsorption speed from the adsorption speed and environmental temperature characteristics of the adsorption member, and the refrigerator is assembled. And the vacuum degree in a vacuum heat insulation body can be maintained over a long term in the state which operated the refrigerator.

  According to a second invention, in the first invention, the core member is formed of an open-cell urethane foam that is a porous structure, and includes an adsorption member recess in which the adsorption member is disposed. It can be easily arranged, and a shortage during the assembly process can be prevented.

  According to a third invention, in the first or second invention, the adsorbing member adsorbs water, air, gas generated inside the vacuum heat insulating casing, or water, air, gas entering from the outside. By keeping the degree of vacuum in the vacuum heat insulating body for a long time, the heat insulating performance can also be maintained for a long time.

  4th invention is a refrigerator provided with the vacuum heat insulation housing | casing in any one of 1st to 3rd, can provide heat insulation performance over a long term, and provides a reliable refrigerator. it can.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In all the drawings, the same or corresponding parts are denoted by the same reference numerals, and redundant description may be omitted. Further, in all the drawings, components for explaining the present invention are extracted and illustrated, and the other components may be omitted from illustration. Furthermore, the present invention is not limited to the following embodiments.

(Embodiment 1)
1 is a perspective view of a refrigerator provided with a vacuum heat insulating casing in Embodiment 1 of the present invention, FIG. 2 is a perspective view of a refrigerator compartment door including a vacuum insulating casing in Embodiment 1 of the present invention, FIG. FIG. 4 is a sectional view of the refrigerator compartment door provided with the vacuum heat insulating casing in Embodiment 1 of the present invention, FIG. 4 is an enlarged sectional view of part A of FIG. 3, and FIG. FIG. 6 is an enlarged cross-sectional view of part B of FIG. 5, FIG. 7 is a cross-sectional view of the vacuum heat insulator in Embodiment 1 of the present invention, FIG. 8 is an enlarged cross-sectional view of part C of FIG. FIG. 10 is an enlarged sectional view of a part D in FIG. 9 and FIG. 11 is a view of the core material and the reinforcing member of the vacuum heat insulating casing according to the first embodiment of the present invention. It is a perspective view.

  In FIG. 1, the refrigerator 1 has a configuration in which a refrigerator main body 2, a refrigerator compartment door 3, an ice making compartment door 4, a vegetable compartment door 5, and a freezer compartment door 6 forming an appearance are arranged. In FIG. 2, the refrigerator compartment door 3 has a configuration in which an outer plate 3a and an inner plate 3c are arranged.

  Next, the configuration of the refrigerator compartment door 3 will be described. 3-5, the refrigerator compartment door 3 is provided with the outer plate 3a, the inner plate 3c, and the vacuum heat insulator 3b arrange | positioned inside the outer plate 3a and the inner plate 3c. The periphery of the refrigerator compartment door 3 is provided with a gasket 3d that seals the inside and outside of the refrigerator 1.

  Moreover, as shown in FIG. 6, the inner plate 3c of the refrigerator compartment door 3 is integrally formed by injection molding of an inner plate cabinet interior 15 and an inner plate outer peripheral portion 14 constituting the side portion of the refrigerator compartment door 3. ing.

  The inner plate 3c has an uneven thickness structure in which the thickness T2 of the outer peripheral portion which is the outside of the refrigerator compartment is larger than the thickness T1 of the inside of the refrigerator which is the refrigerator compartment side. Specifically, the inner plate outer peripheral portion 14 which is outside the refrigerator compartment from the thickness T1 of the inner plate interior 15 inside the inner plate 3c inside the inner plate 3c with the recess 13 for fixing the anchor portion 12 of the gasket 3d as a boundary. The wall thickness T2 is increased.

  As shown in FIGS. 7 and 8, the vacuum heat insulating body 3b of the refrigerator compartment door 3, which is a vacuum heat insulating casing, includes a core member 3bc and a reinforcing member 3bca inside, and the inside is formed by the seal member 3ba and the base member 3bd. It has a vacuum sealed structure.

  The core material 3bc and the reinforcing member 3bca are integrally formed. Specifically, the reinforcing member 3bca arranged in the vacuum heat insulating body 3b is set in advance in the foaming mold when the open cell urethane as the core material 3bc is foam-molded in the foaming mold. It is constructed integrally with open cell urethane.

  As shown in FIGS. 9 to 11, the core material 3bc of the vacuum heat insulating body 3b includes a reinforcing member 3bca formed by integral foaming and an adsorbing member 3bb, and an adsorbing member recess 3bcb and a reinforcing member in a part of the core material 3bc. The member position locating pin mark is provided. Specifically, the reinforcing members 3bca are arranged in pairs in the longitudinal direction of the core member 3bc on the left and right sides of the inner side on the inner plate 3c side. And the reinforcement member 3bca is formed in the curved surface shape along the convex part 10 from the plane part inside the store | warehouse | chamber of the core material 3bc. Further, the flange portion 11 is formed by bending the end portion in the short direction of the reinforcing member 3bca, and the flange portion 11 is arranged so as to extend into the core material 3bc.

  The core member 3bc in the vacuum heat insulating body 3b is formed with a plurality of suction member recesses 3bcb for housing the suction member 3bb on the outer plate 3a side. The suction member recess 3bcb is provided for positioning and quantity control of the suction member 3bb during the vacuum sealing assembly operation of the vacuum heat insulating body 3b.

  In addition, a reinforcing member positioning pin mark 3bcc is provided for easy understanding of the positioning when the reinforcing member 3bca is set in the urethane foam mold during the foam molding of the core material 3bc.

  The reinforcing member 3bca is made of a material that is less likely to change due to thermal contraction than the core material 3bc, for example, a metallic sheet metal.

  The base member 3bd is formed by stacking thermoplastic resins of different materials.

The sealing member 3ba is formed by laminating both surfaces of an aluminum foil with a resin film.

  About the vacuum heat insulation housing | casing comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  First, the “sledge phenomenon” of the refrigerator compartment door 3 will be described. The heat insulation structure of the refrigerator compartment door 3 and the gasket 3d block the heat inside and outside the refrigerator body 2 and the temperature inside the refrigerator compartment is cooled to a predetermined temperature by controlling the temperature of the refrigeration system.

  Here, in order to briefly explain the “sled phenomenon”, particularly when the temperature in summer is high, thermal expansion occurs due to the outside air temperature of 30-40 ° C. in the outside environment of the refrigerator compartment, and the room temperature inside the refrigerator compartment is about 0-10. When the temperature is controlled in the range of ° C. and thermal contraction occurs, the cold room door 3 is subjected to a force that generates “sledge” so that the outside of the refrigerator swells.

  However, in the present embodiment, the inner plate 3c has an uneven thickness structure in which the thickness T2 of the outer peripheral portion that is outside the refrigerator compartment is larger than the thickness T1 inside the refrigerator that is the refrigerator compartment side. Specifically, the inner plate outer peripheral portion 14 which is outside the refrigerator compartment from the thickness T1 of the inner plate interior 15 inside the inner plate 3c inside the inner plate 3c with the recess 13 for fixing the anchor portion 12 of the gasket 3d as a boundary. Since the wall thickness T2 is increased, the thermal contraction inside the inner plate 3c can be reduced, and the thermal contraction generated inside and outside the refrigerator compartment can be reduced, so that the entire refrigerator compartment door 3 can be prevented from warping. .

  Moreover, in this Embodiment, the vacuum heat insulating body 3b of the refrigerator compartment door 3 which is a vacuum heat insulation housing | casing is equipped with the core material 3bc and the reinforcement member 3bca inside, and the inside is evacuated by the sealing member 3ba and the base member 3bd. Since it has a hermetically sealed structure, the bending rigidity of the vacuum heat insulating body 3b is improved, the inside is further vacuum-sealed, and the rigidity is increased, so that heat shrinkage caused by a temperature difference between the inside and outside of the refrigerator can be reduced, and the refrigerator compartment The warpage of the entire door 3 can be suppressed.

  Further, when the core material 3bc is formed, the reinforcing member 3bca is integrally formed at the same time as the foaming of the open cell urethane, so that the core material 3bc and the reinforcing member 3bca are integrally formed, and the bending rigidity of the vacuum heat insulating body 3b is improved. In addition, warpage of the entire refrigerator compartment door 3 can be suppressed.

  Further, since the reinforcing member 3bca uses a material that is less likely to change due to thermal contraction than the core material 3bc, such as a metal sheet metal, the bending rigidity of the vacuum heat insulating body 3b is more reliably improved, and the refrigerator door 3 Overall warpage can be suppressed.

  Further, the base member 3bd constituting the vacuum heat insulating body 3b is formed by laminating thermoplastic resins with different materials and has a gas barrier property such as water or air, so it can be formed into a free shape by vacuum forming or the like. In addition, since the intrusion of gas such as water and air from the outside after vacuum sealing can be prevented and the degree of vacuum can be maintained, the heat insulation performance can be maintained for a long time.

  The sealing member 3ba constituting the vacuum heat insulating body 3b is laminated by laminating both surfaces of an ultrathin aluminum foil with a resin film, and has a gas barrier property such as water or air. Insulation performance can be maintained for a long time because the infiltration of gas such as air and air can be prevented and the degree of vacuum can be maintained.

  Further, the adsorbing member 3bb accommodated in the vacuum heat insulating body 3b can adsorb water or air generated inside the vacuum heat insulating housing or water or air entering from the outside after vacuum sealing. Heat generation performance can be maintained for a long time because gas such as water or air that has been generated from the inside or from the outside is adsorbed and the degree of vacuum is not deteriorated.

Further, the suction member recess 3bcb of the core material 3bc provided in the vacuum heat insulator 3b is formed by the vacuum heat insulator 3.
It is provided for positioning and quantity control during the vacuum sealing assembly work of b.

  The reinforcing member positioning pin mark 3bcc is for facilitating positioning when the reinforcing member 3bca is set in the urethane foam mold during foam molding of the core material 3bc.

  The suction member recess 3bcb of the core 3bc provided in the vacuum heat insulating body 3b and the reinforcing member positioning pin mark 3bcc for facilitating positioning when the reinforcing member 3bca is set in the urethane foam mold are both assembled. It is possible to reliably perform work efficiency and timeless production.

  Further, the adsorbing member 3bb adsorbs water or air generated inside the vacuum heat insulating body 3b or water or air entering from the outside, so that the vacuum degree of the vacuum heat insulating body 3b can be maintained for a long time. Thermal insulation performance can be maintained for a long time.

  Note that. In this Embodiment, although demonstrated using the refrigerator compartment door 3, it is not limited to this, It can apply also to the ice-making compartment door 4, the vegetable compartment door 5, the freezer compartment door 6, etc. FIG.

(Embodiment 2)
FIG. 12 is a perspective view of the core member and the adsorbing member constituting the vacuum heat insulating body of the vacuum heat insulating housing in the second embodiment of the present invention, and FIG. 13 is the vacuum of the vacuum heat insulating housing in the second embodiment of the present invention. It is a graph which shows the relationship between the environmental temperature of the adsorption | suction member arrange | positioned in a heat insulation body, and adsorption speed. Note that the same components as those of the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  In FIG. 12, an adsorbing member 3bb is arranged on the outer plate 3a side (high temperature side) in the vacuum heat insulating body 3b. Specifically, a plurality of suction member recesses 3bcb for housing the suction member 3bb are provided on the outer plate 3a side (high temperature side) of the core member 3bc in the vacuum heat insulator 3b. The suction member recess 3bcb is provided for positioning and quantity control of the suction member 3bb during the vacuum sealing assembly work of the vacuum heat insulating body 3b.

  Further, the core material 3bc is formed of an open cell urethane foam which is a porous structure. When the core material 3bc is formed, an adsorbing member recess 3bcb for accommodating the adsorbing member 3bb at the same time as the open cell urethane foaming is formed. The

  Further, the adsorbing member 3bb adsorbs water or air generated inside the vacuum heat insulating body 3b or water or air entering from the outside.

  FIG. 13 is a graph showing the relationship between the environmental temperature of the adsorption member and the adsorption speed, and shows that the higher the temperature, the faster the adsorption speed.

  About the vacuum heat insulation housing | casing comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  The adsorption member 3bb arranged on the core material 3bc in the vacuum heat insulating body 3b is arranged on the outer plate 3a side (high temperature side) of the core material 3bc. Therefore, the adsorption member 3bb is adsorbed from the adsorption speed and environmental temperature characteristics of the adsorption member 3bb. The speed can be increased, the refrigerator is assembled, and the degree of vacuum in the vacuum heat insulating body 3b can be maintained over a long period of time while the refrigerator is operated, so that the reliability of the refrigerator can be improved.

  Further, the core material 3bc is formed of an open cell urethane foam which is a porous structure. When the core material 3bc is formed, an adsorbing member recess 3bcb for accommodating the adsorbing member 3bb at the same time as the open cell urethane foaming is formed. Therefore, the adsorbing member 3bb can be easily arranged, and a shortage during the assembly process can be prevented.

  In addition, by housing the suction member 3bb in the suction member recess 3bcb, the assembling property of the refrigerator compartment door 3 can be improved without causing unevenness between the core material 3bc and the outer plate 3a.

  Further, the adsorbing member 3bb adsorbs water or air generated inside the vacuum heat insulating body 3b, or water or air entering from the outside, so that heat insulation can be achieved by maintaining the degree of vacuum in the vacuum heat insulating body 3b for a long time. Performance can be maintained for a long time.

(Embodiment 3)
FIG. 14 is a configuration diagram of a foam molding die of the core material of the vacuum heat insulating casing according to Embodiment 3 of the present invention, and FIG. 15 is a diagram of the core material and the foam molding die of the vacuum insulating casing according to Embodiment 3 of the present invention. FIG. Note that the same components as those in the first and second embodiments are denoted by the same reference numerals, and detailed description thereof is omitted.

  Hereinafter, the open-cell foaming mold 7 of open-cell foamed urethane will be described.

  As shown in FIG. 14, the open-cell foaming mold 7 of open-cell foamed urethane has an upper and lower divided structure of a foam-molded upper mold 7a and a foam-molded lower mold 7b.

  Further, as shown in FIG. 15, the foam-molded upper mold 7a and the foam-molded lower mold 7b have a plurality of divided structures. Specifically, the portion of the foam molding upper mold 7a where the adsorbing member recess 3bcb is formed is the upper surface split mold 7ab, and the mating surface is the split mold line. Further, the foam molding lower mold 7b is a divided mold that is a part corresponding to the corner of the core 3bc as a lower surface divided mold 7ba (four faces) obtained by dividing each side part, and is a diagonal line (slanted side) as a mating face. The line.

  With the above configuration, the gas generated during foam molding of open-cell urethane can be easily released, and there is a gas venting effect in the alignment of the foam molding upper mold 7a and the foam molding lower mold 7b. In addition, it is possible to mold a foam-molded product that does not have a lack of wall due to poor gas escape.

  In addition, the foam molding upper die 7a has a plurality of divided structures and facilitates the escape of gas generated during foam molding of open-cell urethane, so the foam shape does not have a lack of gas due to poor gas escape on the surface shape of the molded product. The product can be molded.

  In addition, the foam molding lower mold 7b has a plurality of divided structures to facilitate the escape of gas generated during foam molding of open-celled urethane, so that foam molding does not have a lack of thickness due to poor gas escape on the surface shape of the molded product. The product can be molded.

  In addition, the surface of the molded product after the molding of open-cell urethane facilitates the escape of gas generated during the foam molding of open-cell urethane due to the mold division structure, so that burrs are generated in the degassed traces. Therefore, it is possible to mold a foam molded product in which the surface shape of the molded product does not have a lack of wall due to poor gas escape.

  As described above, the vacuum heat insulating casing of the present invention can be applied not only to a refrigerator but also to a heat insulating structure such as an automobile, a heat pump water heater, an electric water heater, a rice cooker, a bathtub, an outer wall or a roof of a house.

DESCRIPTION OF SYMBOLS 1 Refrigerator 2 Refrigerator main body 3 Refrigeration room door (vacuum insulation housing)
3a outer plate 3b vacuum insulator 3ba sealing member 3bb adsorbing member 3bc core material 3bca reinforcing member 3bcb adsorbing member recess 3bcc reinforcing plate positioning pin mark 3bd base member 3c inner plate 3d gasket 4 ice chamber door 5 freezer compartment door 6 freezer compartment door 6 Door 7 Open-cell foaming mold 7a Foam molding upper mold 7ab Upper surface split mold 7b Foam molding lower mold 7ba Lower surface split mold 10 Convex part 11 Flange part 12 Anchor part 13 Concave part 14 Inner plate outer peripheral part 15 Inner plate interior

Claims (4)

An outer plate, an inner plate, and a vacuum heat insulator disposed inside the outer plate and the inner plate, the vacuum heat insulator including a core material and an adsorbing member inside, the suction The member is arranged on the high temperature side of the vacuum heat insulating body, and has a structure in which the inside is vacuum-sealed with a seal member and a base member. 2. The vacuum heat insulating casing according to claim 1, wherein the core material is formed of an open-cell urethane foam that is a porous structure, and includes a suction member recess in which the suction member is disposed. 3. The vacuum heat insulating casing according to claim 1, wherein the adsorption member adsorbs water, air, or gas generated inside the vacuum heat insulating casing, or water, air, or gas that enters from the outside. . The refrigerator provided with the vacuum heat insulation housing | casing as described in any one of Claim 1 to 3.

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