WO2017168571A1 - 冷蔵庫およびその製造方法 - Google Patents

冷蔵庫およびその製造方法 Download PDF

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Publication number
WO2017168571A1
WO2017168571A1 PCT/JP2016/060153 JP2016060153W WO2017168571A1 WO 2017168571 A1 WO2017168571 A1 WO 2017168571A1 JP 2016060153 W JP2016060153 W JP 2016060153W WO 2017168571 A1 WO2017168571 A1 WO 2017168571A1
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WO
WIPO (PCT)
Prior art keywords
heat insulating
insulating material
vacuum heat
refrigerator
inner box
Prior art date
Application number
PCT/JP2016/060153
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English (en)
French (fr)
Japanese (ja)
Inventor
右侑 兼松
俊 齋藤
Original Assignee
三菱電機株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to CN201690000308.9U priority Critical patent/CN207180153U/zh
Priority to PCT/JP2016/060153 priority patent/WO2017168571A1/ja
Priority to JP2018507887A priority patent/JP6683246B2/ja
Publication of WO2017168571A1 publication Critical patent/WO2017168571A1/ja

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D23/00—General constructional features
    • F25D23/06—Walls
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D23/00—General constructional features
    • F25D23/08—Parts formed wholly or mainly of plastics materials

Definitions

  • the present invention relates to a refrigerator provided with a vacuum heat insulating material and a manufacturing method thereof.
  • a vacuum heat insulating material used in a refrigerator is fixed to an inner box or an outer box by applying a rubber-based hot melt to the entire surface of the bonding surface.
  • a method of applying a rubber hot melt to the entire surface of the vacuum heat insulating material for example, a method of transferring the hot melt by passing a plate-shaped vacuum heat insulating material through a roll as in the heat insulating casing disclosed in Patent Document 1 is known. It has been.
  • the vacuum heat insulating material which has the three-dimensional shape which gave the bending process cannot let a roll pass. Then, like the refrigerator disclosed by patent document 2, for example, the sheet
  • the viscosity of the styrene rubber hot melt is lowered by the heating of the heat insulating casing until the heat insulation casing is filled with the hard urethane foam heat insulating material and the foaming process. Due to factors, the vacuum heat insulating material disposed on the bottom surface of the inner box may be peeled off from the inner box and fall.
  • the present invention has been made in order to solve the above-described problems, and the vacuum heat insulating material disposed on the bottom surface of the inner box until the filling and foaming process of the hard urethane foam heat insulating material of the heat insulating casing is included.
  • An object of the present invention is to provide a refrigerator that can be prevented from falling off the box.
  • the refrigerator according to the present invention includes an outer box, an inner box which is housed in the outer box and forms an internal space with the outer box, and is L bonded to the inner box within the inner space.
  • an adhesive provided on the surface.
  • the adhesive is provided in a linear shape, a dot shape, or a wavy shape in the stress concentration region of the L-shaped vacuum heat insulating material.
  • the vacuum heat insulating material is not peeled off from the inner box and dropped until the filling and foaming process of the hard urethane foam heat insulating material of the heat insulating casing.
  • (A) is a front view of a vacuum heat insulating material provided with a linear styrene rubber hot melt
  • (B) is a plan view of (A).
  • (A) is a front view of the vacuum heat insulating material of the refrigerator which concerns on Embodiment 2 of this invention
  • (B) is a top view of (A).
  • (A) is a front view of the vacuum heat insulating material of the refrigerator which concerns on Embodiment 3 of this invention
  • (B) is a top view of (A).
  • (A) is a front view of the vacuum heat insulating material of the refrigerator which concerns on Embodiment 4 of this invention
  • (B) is a top view of (A).
  • (A) is a front view of the vacuum heat insulating material of the refrigerator which concerns on Embodiment 5 of this invention
  • (B) is a top view of (A).
  • (A) is a front view of the vacuum heat insulating material of the refrigerator which concerns on Embodiment 6 of this invention
  • (B) is a top view of (A).
  • FIG. 1 is a cross-sectional view of the refrigerator according to Embodiment 1 of the present invention as viewed from the side.
  • FIG. 2 is an explanatory view showing an assembling process of the refrigerator according to Embodiment 1 of the present invention.
  • the refrigerator 4 is divided into a refrigerating room 11, an ice making room / switching room 12, a freezing room 13, and a vegetable room 14 by a first partition wall 8, a second partition wall 9, and a third partition wall 10. .
  • a refrigerator compartment 11 is formed at the top, and an ice making room and switching room 12, a freezer compartment 13, and a storage room having a vegetable compartment 14 at the bottom are formed in order from the top.
  • the refrigerator compartment 11 is divided into the upper part of the 1st partition 8, and is maintained at the refrigerator temperature (about +5 degreeC).
  • the ice making chamber and the switching chamber 12 are divided into a space formed by a lower portion of the first partition wall 8 and an upper portion of the second partition wall 9.
  • the ice making chamber has a freezing temperature (about ⁇ 20 ° C.) and the switching chamber has a supercooling temperature (approximately -7 to 0 ° C).
  • the freezer compartment 13 is divided into a space formed by the lower part of the second partition wall 9 and the third partition wall 10, and is maintained at a freezing temperature (about ⁇ 20 ° C.).
  • the vegetable compartment 14 is divided into the lower part of the 3rd partition 10, and is maintained at the refrigerator temperature (about +5 degreeC).
  • the first partition wall 8, the second partition wall 9, and the third partition wall 10 do not have to be disposed if there is no temperature difference between the rooms.
  • the order and configuration of the refrigerator compartment 11, the ice making compartment and the switching compartment 12, the freezer compartment 13 and the vegetable compartment 14 are not limited to the illustrated embodiment, and are implemented in various variations.
  • the refrigerator 4 is composed of an outer box 5 that forms a ceiling and both side surfaces of a refrigerator 4 by bending a metal such as an iron plate into a U shape, and a synthetic resin such as ABS.
  • the main body is composed of an inner box 6 that is inserted and forms an internal space with the outer box.
  • Vacuum heat insulating materials 20, 21, and 23 are respectively disposed in the inner space between the outer box 5 and the inner box 6 on the top, back, and bottom of the refrigerator 4, and a hard urethane foam heat insulating material is provided in the surrounding gap. 7 is filled.
  • the inner box 6 has a three-dimensional shape in which the rear portion of the bottom wall 6A rises in a stepped manner, and a machine room 15 is formed on the back surface of the bottom wall 6A.
  • a compressor 16 and a condenser 18 are disposed inside the machine room 15.
  • a cooler 17 is provided at the rear of the freezer compartment 13 to cool the refrigerator compartment 11, the ice making room and switching room 12, the freezer compartment 13, and the vegetable compartment 14 to a predetermined temperature range.
  • the refrigeration cycle is constructed by connecting the cooler 17, the compressor 16, and the condenser 18 with a pipe.
  • FIG. 3 is an explanatory view showing an outline of the manufacturing process of the vacuum heat insulating material for the refrigerator according to Embodiment 1 of the present invention.
  • the core material 3 of the inorganic fiber aggregate is inserted into the inside of the jacket material 2 made of a gas barrier film, and then the inside of the jacket material 2 is evacuated. It is a configuration.
  • the vacuum heat insulating materials 20 and 23 disposed on the bottom surface and the top surface of the inner box 6 of the refrigerator 4 have a shape obtained by bending the plate-shaped vacuum heat insulating material 1 shown in FIG. 3 into an L shape.
  • the vacuum heat insulating materials 20 and 23 disposed on the bottom surface and the top surface of the inner box 6 of the refrigerator 4 are formed in an L shape.
  • the refrigerator 4 is provided with an electronic control board 19 for operation control on the back of the ceiling.
  • the electronic control board 19 is a self-heating component. Therefore, it is preferable to arrange a vacuum heat insulating material 20 having a higher heat insulating effect than urethane between the inner box 6 and the electronic control board 19.
  • the refrigerator 4 has a heat radiating pipe (not shown) disposed on the ceiling, it is preferable to dispose the vacuum heat insulating material 20 between the heat radiating pipe and the inner box 6.
  • the vacuum heat insulating material 20 disposed on the top surface of the refrigerator 4 is formed by bending the plate-shaped vacuum heat insulating material 1 into an L shape, and is applied to the outer box 5 by applying a styrene rubber hot melt.
  • the ceiling of the refrigerator 4 and the electronic control board 19 are covered at the same time. That is, the manufacturing cost can be reduced by making the vacuum heat insulating material 20 L-shaped.
  • the L-shaped vacuum heat insulating material 20 is not limited to the shape which bent the bending part, For example, it can also implement as a curved shape.
  • a vacuum heat insulating material 23 may be disposed between the inner box 6 and the machine room 15. preferable. Then, the vacuum heat insulating material 23 arrange
  • the bending part of the L-shaped vacuum heat insulating material 20 can also be implemented as a curved shape, for example.
  • the vacuum heat insulating material 21 disposed on the back surface of the refrigerator 4 is bonded to the back metal component 22 by applying a styrene rubber hot melt.
  • the vacuum heat insulating material 23 is installed on the floor surface of the inner box 6, the floor surface of the refrigerator 4 is covered with a floor surface metal component 24, and then the casing is raised, Screw the flange etc. At this time, the vacuum heat insulating material 23 installed on the floor surface of the refrigerator 4 has its own weight acting in the vertical direction that is the falling direction.
  • FIG. 4A is a front view of the L-shaped vacuum heat insulating material
  • FIG. 4B is a plan view of the L-shaped vacuum heat insulating material
  • FIG. 4C is an inner box of the L-shaped vacuum heat insulating material.
  • FIG. 6 is a distribution diagram of stress applied to an adhesive when surface bonding is performed.
  • the horizontal axis indicates the position of the bonding surface
  • the vertical axis indicates the load stress.
  • the load stress of the adhesive when the inner box 6 and the vacuum heat insulating material 20 are in surface contact is highest at the L-shaped bending start position ( ⁇ max ) and thereafter. It gradually decreases.
  • ⁇ max L-shaped bending start position
  • the stress concentration region Y is a stress (a ⁇ ⁇ max ) obtained by multiplying the maximum stress ( ⁇ max ) in the entire region by a predetermined value a obtained by experiment or calculation. It refers to the above stress region.
  • the predetermined value a and the stress concentration region Y are determined by the length L of the vacuum heat insulating material 23, the length A of the portion in contact with the inner box 6, and the length B of the bent portion.
  • the stress distribution when the inner box 6 and the vacuum heat insulating material 23 are surface bonded is determined by the A and B dimensions shown in FIG. .
  • the predetermined value a is about 0.28 to 0.32, so the stress concentration region Y is about 112 mm to 128 mm. Therefore, the stress concentration region Y is 112 mm to 128 mm from the bending start position. If the size of the stress concentration region Y is 120 mm, it is effective to provide the styrene rubber-based hot melt 30 in the region of 280 mm to 400 mm from the end face of the vacuum heat insulating material 23. Therefore, since the stress concentration region Y is 128 mm when the predetermined value a is 0.32, it may be 128 mm or more, and the adhesive may be applied assuming that the dimension B is 150 mm or more.
  • the inner box 6 made of a synthetic resin such as ABS has a heat resistant temperature of about 70 degrees, whereas the styrene rubber hot melt is heated to a high temperature of about 180 degrees at the time of application to increase the viscosity. It is in. Therefore, the styrene rubber hot melt cannot be applied directly to the inner box 6. Therefore, when the inner box 6 and the vacuum heat insulating material 23 are bonded, a styrene rubber-based hot melt is applied to the surface of the vacuum heat insulating material 23 and cooled to 60 ° C. or less which is a heat resistant temperature zone of a synthetic resin such as ABS. It is necessary to do from.
  • the styrene rubber hot melt after cooling has a reduced viscosity and a low adhesive strength.
  • the vacuum heat insulating material 23 formed in an L shape for example, there is a problem that the vacuum heat insulating material is peeled off from the arrangement position and dropped from the inner box 6 because the load on the adhesive is not uniform.
  • the styrene rubber hot melt is an inexpensive material compared to the double-sided adhesive tape, it is suitable for bonding the vacuum heat insulating materials 20, 21, and 23.
  • a vacuum heat insulating material subjected to bending is bonded with a styrene rubber hot melt
  • a method of applying a linearly formed styrene rubber hot melt at equal intervals is known.
  • the plate-like vacuum heat insulating material 1 is bent into an L shape and bonded with the styrene rubber-based hot melt 30, it is difficult to bend it with an adhesive surface in manufacturing,
  • a styrene rubber hot melt is applied.
  • FIG. 5 (A) is a front view of a vacuum heat insulating material provided with a linear styrene rubber hot melt
  • FIG. 5 (B) is a plan view of (A).
  • the adhesive which consists of a linear styrene rubber-type hot melt 30 in the stress concentration area
  • a plurality of rows are provided at predetermined intervals to reinforce the adhesive force between the vacuum heat insulating material 23 and the inner box 6.
  • the styrene rubber hot melt 30 is formed by moving the hot melt coating nozzle in a straight line directly above the L-shaped vacuum heat insulating material 23 or moving the vacuum heat insulating material 23 in a straight line and discharging the nozzle. It is formed into a linear shape by passing the curtain of the melt 30.
  • the vacuum heat insulating material 23 coated with the linear styrene rubber hot melt 30 is bonded to the floor surface of the inner box 6 that moves on the assembly conveyor of the refrigerator 4. Then, the floor surface of the refrigerator 4 is covered with a floor metal component 24 and a compressor stand 25 for installing the compressor 16 is attached. Thereafter, the casing is once stood up, and the flange of the refrigerator 4 is screwed or the like, and is again placed horizontally.
  • the back metal part 22 is covered and the hard urethane foam heat insulating material 7 is filled and foamed from the urethane inlet 26 to form a heat insulating casing.
  • the inner box 6 is covered with the outer box 5, the back metal part 22, and the floor metal part 24.
  • the L-shaped vacuum heat insulating material 23 disposed on the bottom surface of the inner box 6 is firmly bonded to the inner box 6, so that the hard urethane foam heat insulation of the heat insulating casing is provided.
  • the vacuum heat insulating material 23 is not peeled off from the inner box 6 and dropped until the filling and foaming steps of the material 7.
  • the refrigerator 4 of Embodiment 1 is the structure provided only in the stress concentration area
  • FIG. 6 (A) is a front view of the vacuum heat insulating material of the refrigerator according to Embodiment 2 of the present invention
  • FIG. 6 (B) is a plan view of FIG. 6 (A).
  • the description is abbreviate
  • the refrigerator 4 of the second embodiment has a configuration in which a styrene rubber-based hot melt 31 as an adhesive is provided in a dot shape in the stress concentration region Y of the L-shaped vacuum heat insulating material 23.
  • the dot-like styrene rubber hot melt 31 is applied to the vacuum heat insulating material 23 by opening and closing a valve of a hot melt application nozzle.
  • Other configurations are the same as those of the refrigerator of the first embodiment.
  • a styrene rubber-based hot melt 31 is provided in a dot shape in the stress concentration region Y of the vacuum heat insulating material 23 so that the adhesive force between the vacuum heat insulating material 23 and the inner box 6 is strengthened. Therefore, compared with the linear styrene rubber hot melt 30 described in the first embodiment, the density can be changed two-dimensionally with respect to the load stress, and the adhesive strength can be increased more effectively. Can do.
  • the refrigerator 4 of Embodiment 2 is the structure provided only in the stress concentration area
  • region Y which is a location which requires the styrene rubber type hot melt 31, it can reduce a material to use and there exists an economical effect.
  • FIG. 7A is a front view of a vacuum heat insulating material for a refrigerator according to Embodiment 3 of the present invention
  • FIG. 7B is a plan view of FIG. 7A.
  • the description is abbreviate
  • the refrigerator 4 of Embodiment 3 has a configuration in which a styrene rubber-based hot melt 32 as an adhesive is provided in a wavy line in the stress concentration region Y of the L-shaped vacuum heat insulating material 23.
  • a styrene rubber-based hot melt 32 as an adhesive is provided in a wavy line in the stress concentration region Y of the L-shaped vacuum heat insulating material 23.
  • four rows of wavy styrene rubber-based hot melts 32 are provided at predetermined intervals.
  • Other configurations are the same as those of the refrigerator of the first embodiment.
  • the wavy styrene rubber hot melt 32 is applied by moving the hot melt application nozzle in a wavy shape immediately above the vacuum heat insulating material 23.
  • the vacuum heat insulating material 23 is moved in a wavy line and applied through a hot melt curtain discharged from a hot melt application nozzle.
  • the styrene rubber hot melt 32 is provided in a wavy shape in the stress concentration region Y of the vacuum heat insulating material 23 so that the adhesive force between the vacuum heat insulating material 23 and the inner box 6 is enhanced. Therefore, the adhesive strength can be increased regardless of the direction of the load. That is, since the L-shaped vacuum heat insulating material 23 is firmly bonded to the inner box 6, the L-shaped vacuum heat insulating material 23 is peeled off and dropped from the inner box 6 until the filling and foaming process of the hard urethane foam heat insulating material 7 of the heat insulating housing. There is no. Moreover, since the refrigerator 4 of Embodiment 3 is the structure provided only in the stress concentration area
  • FIG. 8A is a front view of a vacuum heat insulating material for a refrigerator according to Embodiment 4 of the present invention
  • FIG. 8B is a plan view of FIG. 8A.
  • the description is abbreviate
  • the linear styrene rubber-based hot melt 30 described in the first embodiment has a plurality of rows (with a predetermined interval) in the stress concentration region Y of the L-shaped vacuum heat insulating material 23 (
  • a second linear styrene rubber hot melt 33 having a coating density lower than that of the styrene rubber hot melt 30 provided in the stress concentration region Y is provided in the non-stress concentration region X.
  • a plurality of rows (three rows in the illustrated example) are provided at predetermined intervals.
  • the refrigerator 4 of the fourth embodiment has a configuration in which the application density of the styrene rubber hot melts 30 and 33 on the bonding surface Z of the vacuum heat insulating material 23 is increased.
  • Other configurations are the same as those of the refrigerator of the first embodiment.
  • the linear styrene rubber hot melt 30 is provided in the stress concentration region Y of the vacuum heat insulating material 23, and the second linear styrene rubber hot melt is also provided in the non-stress concentration region X. 33 is provided to strengthen the adhesive force. That is, the L-shaped vacuum heat insulating material 23 is firmly bonded to the inner box 6 and is not peeled off and dropped from the inner box 6 until the filling and foaming process of the hard urethane foam heat insulating material 7 of the heat insulating casing. Moreover, since the refrigerator 4 of Embodiment 4 is the structure which concentratedly provided in the stress concentration area
  • FIG. 9 (A) is a front view of the vacuum heat insulating material for a refrigerator according to Embodiment 5 of the present invention
  • FIG. 9 (B) is a plan view of FIG. 9 (A).
  • the description is abbreviate
  • the dot-shaped styrene rubber hot melt 31 described in the second embodiment is provided in the stress concentration region Y of the L-shaped vacuum heat insulating material 23, and further, the non-stress concentration region X
  • a second dot-like styrene rubber hot melt 34 having a lower coating density than the dot-like styrene rubber hot melt 31 provided in the stress concentration region Y is provided. That is, the refrigerator 4 of the fifth embodiment has a configuration in which the application density of the styrene rubber hot melts 31 and 34 on the bonding surface Z of the vacuum heat insulating material 23 is increased. Other configurations are the same as those of the refrigerator 4 of the first embodiment.
  • the refrigerator 4 according to the fifth embodiment is provided with the dot-like styrene rubber hot melt 31 in the stress concentration region Y of the vacuum heat insulating material 23 and the second dot-like styrene rubber hot melt also in the non-stress concentration region X. 34 is provided to strengthen the adhesive force. That is, the L-shaped vacuum heat insulating material 23 is firmly bonded to the inner box 6 and is not peeled off and dropped from the inner box 6 until the filling and foaming process of the hard urethane foam heat insulating material 7 of the heat insulating casing.
  • the refrigerator 4 of Embodiment 5 is the structure which concentratedly provided in the stress concentration area
  • FIG. 10 (A) is a front view of a vacuum heat insulating material for a refrigerator according to Embodiment 6 of the present invention
  • FIG. 10 (B) is a plan view of FIG. 10 (A).
  • the description is abbreviate
  • the wavy styrene rubber hot melt 32 described in the third embodiment has a plurality of rows (with a predetermined interval) in the stress concentration region Y of the L-shaped vacuum heat insulating material 23.
  • the second wavy styrene rubber system having a coating density lower than that of the wavy styrene rubber hot melt 32 provided in the stress concentration area Y in the non-stress concentration area X.
  • the hot melt 35 is provided in a plurality of rows (two rows in the illustrated example) at predetermined intervals.
  • the refrigerator 4 of the sixth embodiment has a configuration in which the application density of the styrene rubber hot melts 32 and 35 on the bonding surface Z of the vacuum heat insulating material 23 is increased.
  • Other configurations are the same as those of the refrigerator 4 of the first embodiment.
  • a wavy styrene rubber hot melt 32 is provided in the stress concentration region Y of the vacuum heat insulating material 23, and a second wavy styrene rubber hot melt 35 is provided in the non-stress concentration region X. It is provided to strengthen the adhesive strength. That is, the L-shaped vacuum heat insulating material 23 is firmly bonded to the inner box 6 and is not peeled off and dropped from the inner box 6 until the filling and foaming process of the hard urethane foam heat insulating material 7 of the heat insulating casing.
  • the refrigerator 4 of Embodiment 6 is the structure which concentratedly provided in the stress concentration area
  • the present invention has been described above based on the embodiment, the present invention is not limited to the configuration of the embodiment described above.
  • the present invention can be carried out in a configuration in which any one of a linear styrene rubber hot melt 30, a dot styrene rubber hot melt 31, and a wavy styrene rubber hot melt 32 is provided. Modifications can be made as appropriate within the scope of the technology. In short, it should be noted that the scope of the present invention also includes the scope of various changes, applications, and uses made by those skilled in the art as needed.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
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PCT/JP2016/060153 2016-03-29 2016-03-29 冷蔵庫およびその製造方法 WO2017168571A1 (ja)

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CN201690000308.9U CN207180153U (zh) 2016-03-29 2016-03-29 冰箱
PCT/JP2016/060153 WO2017168571A1 (ja) 2016-03-29 2016-03-29 冷蔵庫およびその製造方法
JP2018507887A JP6683246B2 (ja) 2016-03-29 2016-03-29 冷蔵庫およびその製造方法

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JP2019015476A (ja) * 2017-07-10 2019-01-31 パナソニックＩｐマネジメント株式会社 真空断熱筐体

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