JP2009109053A - Gasket - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a gasket capable of being used in a refrigerator and the like and having superior heat insulating performance. <P>SOLUTION: This gasket 101 is made of vinyl chloride, and comprises a hollow room 102 and a magnetic room 103. A magnet 104 is disposed in the magnetic room 103. A wall surface of the hollow room 102 has a cut to insert a part of a heat insulating material 105. An insertion portion 106 having a wedge shape at its tip is disposed at a lower portion of the hollow room 102. A wall surface of a cabinet 107 is formed by charging a urethane foam heat insulating material 110 between an outer case made of steel sheet and an inner case 109 made of ABS. A vacuum heat insulating material may be buried when the urethane foam heat insulating material 110 is thinned. A mounting groove 112 for inserting the insertion portion 106 and fixing the gasket 101 to a door 111 is formed on a peripheral edge portion of the door 111. Thus heat exchange between the wall surface of the hollow room 102 of the gasket 101 and the outside air can be suppressed. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a gasket used for a refrigerator, a showcase and the like.

  In recent years, there has been a strong demand for energy consumption reduction for refrigeration equipment such as refrigerators and vending machines and thermal equipment such as jar pots, and efforts for thermal insulation design have been actively conducted. Taking a refrigerator as an example, the heat that enters from the outside through the wall surface into the refrigerator cooled to a predetermined refrigeration or freezing temperature can be suppressed by improving the performance of the heat insulating material. For this reason, a vacuum heat insulating material having a heat insulation performance of several tens of times that of a urethane foam heat insulating material generally used in the refrigerator wall surface has been developed, and the intrusion heat from the wall surface has been greatly reduced.

  Another intrusion heat is heat that enters from the gap between the cabinet and the door on the front of the refrigerator. For this reason, the peripheral edge of the door is provided with a gasket to close the gap, thereby reducing the intrusion heat. Some gaskets have a mechanism in which a magnet is embedded, and the door is attracted to the cabinet by the magnetic force to close the door. At this time, there is a method of reducing the amount of intrusion heat by providing a heat insulating air layer on the gasket (see, for example, Patent Document 1).

FIG. 4 is a cross-sectional view of a conventional refrigerator gasket. This gasket is formed of two sections, a first section 2 and a second section 3 that overlap the lower chamber wall surface of the cavity chamber 1, and the flexible urethane foam 4 is opened by opening the two sections. Is inserted into the cavity chamber 1. In inserting the flexible urethane foam 4, first, the first section 2 and the second section 3 are opened, and the flexible urethane foam 4 is inserted into the cavity chamber 1 through the opening. Thus, the operation is simple, and the productivity can be greatly improved as compared with the case where two pieces are not provided, and a gasket excellent in heat insulation performance can be provided.
Japanese Patent No. 3164837

  However, although the heat insulation performance in the hollow chamber 1 can be improved in the above-described conventional configuration, there is a problem that heat permeates from the high temperature side to the low temperature side due to the heat conduction of the gasket itself.

  An object of this invention is to provide the gasket excellent in the heat insulation performance.

  In order to achieve the above object, the gasket of the present invention includes a hollow chamber, a magnet chamber at the upper portion of the hollow chamber, and a heat insulating material on a surface in contact with air outside the wall surface of the hollow chamber.

  As a result, when heat is transferred from the high temperature side to the low temperature side through the gasket, the heat transferred by the heat conduction and convection of the air in the cavity chamber and the heat transferred by the gasket itself are blocked by the heat insulating material. In addition, since the gasket is provided with the magnet chamber, the gasket is in close contact with the metal casing by magnetic force, so that the inflow and outflow of air from the gap can be suppressed, and the heat intrusion into the space with the temperature difference between the gaskets can be prevented. Can be suppressed.

  According to the gasket of the present invention, a cabinet having a hollow chamber, a magnet chamber at an upper portion of the hollow chamber, and a heat insulating material on a surface in contact with air outside the wall surface of the hollow chamber, and a cabinet having the opening and the opening The heat intrusion from the gasket can be reduced for a heat insulating box composed of doors that close the door. For this reason, even if the inside of a box is cooled or heated, the thermal efficiency can be improved.

  The invention of the gasket according to claim 1 is provided with a hollow chamber, a magnet chamber in the upper portion of the hollow chamber, and a heat insulating material on a surface in contact with the air outside the hollow chamber wall surface. The amount of heat exchange with the outside air can be suppressed. In addition, since it has a magnet, it is in close contact with the metal casing by its magnetic force, so the gap between the gasket and the metal casing can be reduced, so the amount of air flowing in and out of the gap can be reduced, and the insulation performance of the gasket can be improved. .

  The invention of a gasket according to claim 2 is the invention according to claim 1, wherein a heat insulating material is provided on a side having high air heat transfer coefficient in a surface in contact with air outside the cavity wall surface. Since the heat insulating material is provided on the side where the amount of heat exchange between the gasket and air is large, the heat transfer amount can be suppressed, so that the heat insulating performance of the gasket can be further improved.

  The invention of the gasket according to claim 3 is the invention according to claim 1 or 2, wherein a notch is provided in a part of the wall surface of the cavity chamber, and a part of the heat insulating material is inserted into the notch. A wall surface area can be reduced and a heat insulating material can be provided. For this reason, since the contact area of a hollow chamber wall surface and a heat insulating material, ie, a heat transfer area, can be reduced, the heat insulation performance of a gasket can further be improved.

  The invention of the gasket according to claim 4 is the invention according to any one of claims 1 to 3, wherein the heat insulating material is a vacuum heat insulating material in which a gas barrier resin box is filled with a core material and sealed under reduced pressure. Therefore, the heat insulating performance of the heat insulating material can be improved, and the heat transfer amount passing through the heat insulating material can be suppressed, so that the heat insulating performance of the gasket can be further improved.

  The invention of the gasket according to claim 5 is the invention according to any one of claims 1 to 3, wherein the heat insulating material is a core material that is a glass fiber laminate in a jacket material made of a gas barrier film. Since the heat insulating performance of the heat insulating material can be improved and the amount of heat transferred through the heat insulating material can be suppressed, the heat insulating performance of the gasket can be further improved.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Further, the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a cross-sectional view showing a gasket and its peripheral portion according to Embodiment 1 of the present invention. FIG. 2 is a cross-sectional view of a vacuum heat insulating material in which a gas core resin box is filled with a powder core material and sealed under reduced pressure in the gasket of the same embodiment. FIG. 3 is a cross-sectional view of a vacuum heat insulating material that is sealed under reduced pressure by inserting a glass fiber core material into a gas barrier outer covering material in the gasket of the same embodiment.

  A gasket 101 shown in FIG. 1 is made of vinyl chloride and includes a hollow chamber 102 and a magnet chamber 103. A magnet 104 is disposed in the magnet chamber 103. The wall surface of the hollow chamber 102 has a cut, and a part of the heat insulating material 105 is inserted therein. At the lower part of the hollow chamber 102, an insertion part 106 having a wedge-shaped tip is provided.

  The wall surface of the cabinet 107 is formed by filling a urethane foam heat insulating material 110 between an outer box 108 made of steel plate and an inner box 109 made of ABS. In addition, when making the urethane foam heat insulating material 110 thin, it is good to embed a vacuum heat insulating material.

  An attachment groove 112 for inserting the insertion portion 106 and fixing the gasket 101 to the door 111 is provided at the peripheral edge of the door 111.

  As shown in FIG. 2, the heat insulating material 105 is sealed by filling a powder core material 114 in a resin box 113 having a gas barrier property and reducing the inside to 10 Pa or less. The powder core material 114 is a fine powder having a primary particle diameter of 5 to 20 nanometers, and has a space ratio of 90% or more when filled.

  As shown in FIG. 3, the heat insulating material 105 is filled with a core material 116 made by baking glass fibers into a jacket material 115 made of a laminate film having gas barrier properties, and the inside is reduced to 10 Pa or less. And may be sealed. Moreover, the influence by residual moisture can be reduced by enclosing the moisture adsorbing material 117.

  As described above, the cavity chamber 102 is provided with the magnet chamber 103 in the upper portion of the cavity chamber 102, and the heat insulating material 105 is provided on the surface in contact with the air outside the wall surface of the cavity chamber 102. And the amount of heat exchange with the air of the outside can be controlled. Further, since the magnet 101 is provided, the magnet 101 is in close contact with the metal casing, so that the gap between the gasket 101 and the metal casing can be reduced, so that the amount of air flowing in and out of the gap can be reduced. Performance can be improved.

  The gasket concerning this invention has a heat insulating material in the surface which a gasket and air contact, and can suppress the amount of heat transfer. For this reason, the heat insulation effect of a refrigerator, a showcase, etc. improves, it can be used for the heat insulation of the various cold insulation and the heat insulation apparatus which are drive | operated by an electrical energy, and also the opening-and-closing part of a house etc.

Sectional drawing which shows the gasket and its peripheral part in Embodiment 1 of this invention Sectional drawing of the vacuum heat insulating material which filled the powder core material inside the gas-barrier resin box in the gasket of the same embodiment, and was sealed under reduced pressure Sectional drawing of the vacuum heat insulating material which inserted the glass fiber core material in the gas-barrier outer covering material in the gasket of the embodiment, and sealed under reduced pressure Sectional view of a conventional refrigerator gasket

Explanation of symbols

DESCRIPTION OF SYMBOLS 101 Gasket 102 Cavity chamber 103 Magnet chamber 105 Heat insulation material 113 Gas barrier resin box 114 Core material (powder)
115 Gas barrier outer covering material (laminate film)
116 Core material (glass fiber)

Claims (5)

  A gasket comprising: a cavity chamber; a magnet chamber in an upper portion of the cavity chamber; and a heat insulating material on a surface in contact with air outside the cavity chamber wall surface.   The gasket according to claim 1, wherein a heat insulating material is provided on a side having a high heat transfer coefficient of air among the surfaces in contact with air outside the wall surface of the hollow chamber.   The gasket according to claim 1 or 2, wherein a cut is provided in a part of the wall surface of the hollow chamber, and a part of the heat insulating material is inserted into the cut.   The gasket according to any one of claims 1 to 3, wherein the heat insulating material is a vacuum heat insulating material filled with a core material in a gas barrier resin box and sealed under reduced pressure.   The heat insulating material is a vacuum heat insulating material that is sealed under reduced pressure by inserting a core material, which is a glass fiber laminate, into a jacket material made of a gas barrier film. The gasket as described in.

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