JP2008175467A - Refrigerator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a refrigerator capable of reducing cost, by eliminating complicatedness of a manufacturing process such as separately arranging a magnetic plate on an attraction surface to the body side of a magnet gasket, by restraining thermal influence on the storage inside temperature by avoiding an extension piece of an outer box in a joining part in front of the outer box and an inner box in approaching the inside of a storage. <P>SOLUTION: A collar part 2a in the inside direction being the attraction surface of the magnet gasket 11 installed in a peripheral edge part on the inside of a door 12, is formed on the peripheral edge of at least the upper side and the right-left sides of the outer box 2 in a front opening part. The extension piece 2d is formed by further bending the edge of the collar part backward, and the edge of the outward collar part 4a formed on the front opening part peripheral edge of the inner box is extended backward by being spliced to the extension piece of the outer box collar part, and the outer box and the inner box are joined by running a locking piece 4c formed by further bending a rear end part outward, along the edge of the outer box extension piece. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a refrigerator having an improved inner / outer box coupling structure of a front opening of a main body so as to suppress heat leakage inside and outside the cabinet.

  In general, in household refrigerators, a foam insulation is filled between the outer box and the inner box to form a heat insulation box, and the front opening of the storage room is closed with a heat insulating door and attached to the inner periphery of the door The magnet gasket is adsorbed on the flange formed on the peripheral edge of the opening of the outer box to block the air flow between the door and the main body and suppress the heat leakage inside and outside the cabinet.

  Conventionally, as shown in FIG. 3, the inner and outer box connecting portion has a groove having a U-shaped cross section in the width center direction forming a flange portion (32 a) provided at the periphery of the front opening of the outer box (32). (43) The outer flange (34a) formed in the front opening of the inner box (34) is inserted into the inner box (43) to join the inner and outer boxes, and the U-shaped groove (43) and the outer box side wall (32b) ) Is provided with a dew-proof pipe (44) that forms part of the refrigeration cycle and through which the high-temperature gas refrigerant circulates.

  The dew-proof pipe (44) is a flange of the outer box made of steel plate in the vicinity of the magnet gasket (41) on the back surface of the storage chamber (36) opening (39), which is the most heat leaking part as a refrigerator ( 32a) is cooled below the dew point temperature under the influence of the low-temperature air in the storage chamber, and acts as a heating body for preventing condensation from the heel part (32a) to the outer outer box surface.

  The configuration of the outer box collar (32a) in the above is because the dew-proof pipe (44) is disposed on the back surface thereof, and further overlapped with the surface of the inner box collar (34a) over a predetermined distance, It is necessary to extend inward for a considerable distance from the outer wall (32b) of the outer box, and at the same time, a bent piece inside the hook (32a) to hold the hook (34a) of the inner box (32c) also extends into the heat insulating wall (33), so that the flange (32a) extending inside the warehouse and the bent piece (32c) extending into the heat insulating wall (33) are attached to the dew-proof pipe ( 44) is heated by the heat conduction action, and heat is propagated through the heat insulating material (33) as understood from the temperature distribution contour (contour lines) drawn by a broken line in the heat insulating material (33) of FIG. As a result, the air temperature in the storage chamber (36) rises due to this thermal effect, and there is a harmful effect of increasing power consumption to cool the temperature rise. It was.

On the other hand, as shown in FIG. 4, a U-shaped groove (63) opening forward is formed on the outer side of the front portion of the outer box (52), and the peripheral edge of the front opening of the inner box (54) is formed. An engagement piece (54b) bent further rearward from the outward flange (54a) formed on the outer casing (52) is provided, and the engagement piece (54b) is formed into a U-shaped groove (63) of the outer box (52). There is an invention that is held between the two (see Patent Document 1). If it is this structure, since the collar part (32a) of the outer box shown in the said FIG. 3 does not extend inside a store | warehouse | chamber, there exists an advantage which can make the heat conduction inside and outside a store | chamber small.
Japanese Utility Model Publication No. 58-28283

  However, in the configuration described in Patent Document 1, installation of a dew proof pipe for preventing condensation on the surface of the outer box (52) is not taken into consideration, and the outer box made of a steel plate that becomes a magnetic body ( 52) does not face the gasket (61), and the gasket (61) faces the flange (54a) of the synthetic resin inner box (54), so the gasket is closed when the door (59) is closed. In order to attract the magnet portion (61b) of (61) to the main body side, it is essential to attach a ferromagnetic plate to the back surface of the flange portion (54a) of the inner box (54), which complicates the manufacturing process. At the same time, there was a problem that the cost was high.

  The present invention has been made in consideration of the above points, and avoids the extension of the outer box at the joint portion at the front surface between the outer box and the inner box from approaching the inside of the box, and the heat to the inside temperature. An object of the present invention is to provide a refrigerator capable of reducing the cost while suppressing the influence and eliminating the complexity of the manufacturing process such as separately providing a magnetic plate on the adsorption surface of the magnet gasket on the main body side. And

  In order to solve the above-mentioned problems, the present invention combines an outer box that forms an outer shell and an inner box that forms a storage chamber, and forms a heat insulating box by filling a foam insulation between the inner and outer boxes. In the refrigerator in which the front opening of the heat insulation box is closed with a door so that it can be freely opened and closed, at least the upper side and the left and right sides of the outer box in the front opening, and the magnet gasket attached to the inner edge of the door; Forming an inward eaves portion and further bending the end edge of the eaves portion backward to form an extension piece, and the outward eaves end formed on the periphery of the front opening of the inner box An engaging portion formed by attaching an edge to the extension piece of the flange portion of the outer box and extending rearward and bending the rear end portion thereof outward is along the edge of the extension piece of the outer box. The outer box and the inner box are combined with each other.

  According to the refrigerator of the present invention, it is possible to avoid the proximity of the extension piece of the outer box collar part to the inner side of the box and suppress the thermal influence on the temperature inside the box, and to obtain an effective heat shut-off performance. The attracting surface of the magnet part can be effectively formed in the outer box, and the manufacturing process can be eliminated and the cost can be reduced.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The refrigerator main body (1) which shows the schematic longitudinal cross-sectional view in FIG. 1 is a heat insulation box in which a storage space is formed by an inner box (4) provided via an outer box (2) and a heat insulating material (3). It is configured, and the front opening of the storage space is divided by several insulated partition walls (5) to form a plurality of independent spaces in the cabinet, each of which is a refrigerator room (6) or vegetable room (7) Cooling control is performed to a predetermined temperature range suitable for the storage temperature of food such as the freezer compartment (8).

  Opening doors such as a refrigerator door (9) and a freezer door (10) are provided at the opening of each storage room, and in each door, the refrigerator door (9) is one side of the front opening. The hinges attached to the upper and lower sides of the hinge are pivotally supported by pivoting one side thereof, but the freezer compartment (8) and other storage compartment doors are formed in a drawer type.

  A magnet gasket (11) is attached to the periphery of the back surface of each door. As an example, as shown in FIG. 2, which is an enlarged cross-sectional view of a closed state in the left side portion of the refrigerator compartment (6), the magnet gasket (11) includes an outer box (2 ) And the inner box (4) and the door inner plate (12) forming the back of the refrigerator compartment door (9) is hermetically sealed to form a refrigerator compartment formed of the inner box (4). (6) The inside and outside are thermally shut off, and a raw material for foam insulation such as urethane foam is injected between the inside and outside boxes to prevent heat leakage in combination with the foam filled insulation (3). 6) The inside is kept at a predetermined refrigeration temperature.

  The structure of the magnet gasket (11) is basically the same in any of the above-described storage chamber doors. The magnet (11a) is made of a long string-like soft body having a rectangular cross section formed by mixing soft rubber and magnetic powder. ) Has a cross-sectional shape composed of a magnet portion (11b) inserted and held, an attachment portion (11c) to the door inner plate (12) side, and a thin bag-like portion (11d) that connects these in a stretchable manner, A frame shaped along the periphery of the back surface of the door (9) by cutting an extruded long piece of soft synthetic resin into a long string shape with an inclination angle of 45 degrees, and abutting the end faces to heat welding. It was formed.

  The attachment portion (11c) has a wedge-shaped anchor shape protruding downward from the thick base, and is fitted into an attachment groove (12a) formed by undercutting on the four peripheral edges of the door inner plate (12). By doing so, the gasket (11) is held so as not to come out.

  The bag-like part (11d) is formed by connecting the magnet part (11b) and the attachment part (11c) with a thin-walled material to form a bag, and the bag-like part (11d) forms a magnet gasket (11). 2 can be expanded and contracted in the vertical direction in FIG. 2, which is the opening and closing direction of the door (9), absorbs the adsorption force of the magnet part (11b) when the door is opened, relaxes the opening force, and magnets (11a) when the door is closed Has a buffering effect of the amount of splashing on the outer casing collar (2a) and the closing force.

  The magnet part (11b) has a shape that is located on the outside with respect to the position of the attachment part (11c) to the door inner side (12), that is, outward in both the width direction and the ceiling direction, and closes the refrigerator door (9). Sometimes, it is formed so as to be adsorbed to the flange (2a) of the outer box at the periphery of the opening of the main body, and the soft fin (11e) extending to the inner side of the bag-like part (11d) connected to the inner side of the box The heat insulating effect is increased by providing a plurality of heat insulating spaces between the inside and the outside of the cabinet by abutting the tip thereof with the step (12b) inside the door.

  The magnet gasket (11) formed in this manner has a surface of the flange portion (2a) in which the magnet portion (11b) forms the front opening of the thin steel plate outer box (2) by the magnetic force of the magnet (11a). By adsorbing, the space between the refrigerator compartment (6) and the outside of the refrigerator is hermetically sealed and the heat is shut off. The gasket mounting portion (11c) is not limited to the configuration in which the gasket is fitted into the mounting groove (12a) of the door inner plate as described above, and may be an adhesive or screw fixing method. A structure in which a gasket made of resin is integrally formed may be used.

  Thus, the flange (2a) of the outer box (2) to which the magnet gasket (11) is adsorbed is directed inward from the front side openings of both side walls (2b) and the ceiling surface (2c) of the outer box. The magnet portion (11b), which is an attracting portion when the door is closed, is formed to have a width that can be attracted to the minimum, and the edge of the flange portion (2a) is further bent in the vertical direction further by a predetermined length to extend the extension piece. (2d) is formed.

  And the outward flange part (4a) formed in the front opening periphery of the inner box (4) made of synthetic resin made into a box shape by vacuum forming or the like is the front surface of the flange part (2a) of the outer box The front opening of the refrigerator compartment (6) is formed in substantially the same plane as that, and the outward edge thereof is attached to the extension piece (2d) of the outer box so as to extend rearward. And a rear end portion thereof is bent outward to form a locking portion (4c), which is engaged with an end edge of the extension piece (2d) of the outer box to thereby form the outer portion. The box (2) and the inner box (4) are combined.

  According to this configuration, when the door is closed, as shown in FIG. 2, the front surface of the flange portion (2a) of the outer box is covered with the magnet portion (11b) of the magnet gasket (11), and the flange portion (4a of the inner box) ) Is similarly covered with the bag-like portion (11d) and the soft fin (11e), and there is only a small gap on the front surface of each flange (2a) (4a). Can eliminate the low-temperature air in the refrigerating chamber (6) from entering the air gap, thereby preventing the cooling action to the outer box collar (2a) and further suppressing heat leakage inside and outside the cabinet. It is something that can be done.

  When the inner and outer boxes are assembled and manufactured, the inner box (4) is inserted from the front opening side of the outer box (2) formed in a box shape, and the locking portion (4c) of the inner box is used as an extension piece of the outer box. By pushing to the rear of (2d) using the respective elasticity, the locking portion (4c) is locked to the rear end of the extension piece (2d), and the inner and outer boxes can be joined. In addition, apart from the above, the outwardly bent dimension of the locking portion (4c) of the inner box (4) is made longer or further bent to cover the end of the extension piece (2d) of the outer box. The inner box (4) may be inserted into the inside through the rear opening of the outer box (2) and coupled together.

  The magnet part (11b) in the magnet gasket (11) is shaped to be located outside the position of the attachment part (11c) to the door inner side (12), and when the refrigerator door (9) is closed, the opening of the main body is opened. It is formed so as to be attracted to the flange (2a) of the outer box at the periphery of the part. At this time, the magnet gasket (11) is projected from the projection space of both side walls (2b) and the ceiling surface (2c) of the outer box. The bag-shaped part (11d) is designed so as not to protrude outward.

  As a result, the magnet part (11b) can be positioned more deviated from the outside as compared with the conventional configuration, and it is not necessary to provide a ferromagnetic material or the like as a separate part compared to the conventional structure, thus simplifying the manufacturing process. In addition, the cost can be reduced, and even the narrow flange portion (2a) can be secured by adhering with a sufficient overlapping width, and the hermetic sealing action when the door is closed can be performed reliably.

  When the door is closed, the magnet portion (11b) of the magnet gasket (11) covers most of the surface area of the flange portion (2a) of the outer box and enters the inside of the steel plate flange portion (2a) which is a good heat conductor. The soft fin (11e) covers the surface of the collar (4a) of the inner box connected to the collar (2a) of the outer box, so that the low temperature air in the refrigerator compartment (6) It is possible to cool the flange (2a) of the outer box and suppress heat leakage from the outside due to heat conduction. Therefore, the temperature in the storage room can be effectively maintained, and the power consumption can be reduced.

  Further, the U-shaped groove (13) formed by the outer box side wall (2b), the flange (2a) and the extension piece (2d) forms a part of the refrigeration cycle, and the high temperature and high pressure from the compressor. A dew-proof pipe (14) that circulates and condenses the gas refrigerant is disposed over the periphery of the refrigerator compartment (6), and the above-mentioned coagulant is added by adding a slight bend to the straight part or using a spacer. It arrange | positions in the heat exchange relationship with each surface of the outer box (2) which forms a character-shaped groove (13).

  With this configuration, the extension piece (2d) of the outer box flange part (2a) that engages with the locking part (4c) of the inner box flange part (4a) is used as the heat insulating wall (3) close to the outer box side wall (2b). Therefore, even if the temperature rises due to heat conduction from the dew-proof pipe (14), the heat insulation of the heat insulating wall (3) is not sufficient as the conventional temperature distribution shown in FIG. The dew-proof pipe (14) can effectively transfer the heat to the vicinity of the flange (2a) of the outer box to warm the surface of the outer box (2), and the dew-proof pipe (14 ) And the magnet part (11b) of the magnet gasket are close to each other, so the heat of the dew proof pipe (14) is also conducted to the refrigerator compartment door (9) side through the magnet gasket (11) to dissipate heat. This also contributes to the suppression of condensation on the door side.

  Furthermore, as described above, the outer box collar (2a) has a structure that is difficult to be cooled by the low-temperature air in the cabinet, so that the temperature difference between the inside and outside of the cabinet becomes large as in the summer when the atmosphere is high temperature and high humidity. Even so, it is possible to effectively prevent the condensation of the outer box surface outside the collar part (2a) that is cooled below the dew point temperature.

  The present invention is configured as described above, and effectively suppresses heat leakage between the inside of the refrigerator compartment (6) and the outside of the refrigerator without impairing the attractive force when the door is closed by the magnet gasket (11), thereby improving the cooling efficiency. Power consumption can be reduced, and condensation on the outer box surface can be prevented.

  The dew-proof pipe (14) is installed in the U-shaped groove (13) of the outer box (2) at a stage before being joined to the inner box (4), and the foam insulation after the inner and outer boxes are joined. By fixing the material (3) to form a heat insulation box, it is fixed at a predetermined position in the heat insulation wall.

  And in the said Example, although the relationship structure of the collar part (2a) of the outer box and the collar part (4a) of an inner box in a front opening part was demonstrated with the example of the refrigerator compartment (6), Needless to say, the present invention may be applied to other storage room configurations such as the vegetable room (7) and the freezing room (8).

It is a longitudinal cross-sectional view which shows the outline of the refrigerator in this invention. It is an expansion cross-sectional view of the inner / outer box coupling portion configuration showing one embodiment of the present invention. FIG. 3 is a cross-sectional view showing a conventional inner / outer joint configuration of the same part as FIG. It is a cross-sectional view showing still another conventional inner / outer box coupling portion configuration.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Refrigerator main body 2 Outer box 2a Outer box collar part 2b Outer box side wall 2d Extension piece 3 Heat insulation layer 4 Inner box 4a Eaves part 4b Extension part 4c Locking part 6 Refrigeration room 9 Refrigeration room door
11 Magnet gasket 11a Magnet 11b Magnet part
11c Mounting part 11d Bag-shaped part 11e Soft fin
12 Door inner plate 12a Mounting groove 12b Step
13 U-shaped groove 14 Dew prevention pipe

Claims (3)

  The outer box that forms the outer shell and the inner box that forms the storage chamber are joined together, and a foam insulation is filled between the inner and outer boxes to form a heat insulation box, and the front opening of the heat insulation box can be opened and closed with a door. In the refrigerator configured to be closed, an inward flange serving as an adsorption surface of a magnet gasket attached to the inner peripheral edge of the door is formed on at least the upper and left and right edges of the outer box in the front opening. The edge of the collar is further bent backward to form an extension piece, and the edge of the collar toward the outside formed on the periphery of the front opening of the inner box is used as the extension piece of the collar of the outer box. The outer box and the inner box are joined by extending the rearward end and bending the rear end part to the outer side, along the edge of the extension piece of the outer box. A refrigerator characterized by that.   2. The refrigerator according to claim 1, wherein the magnet portion of the magnet gasket is positioned outside the attachment portion to the door and is attracted to the flange portion of the outer box when the door is closed.   3. The refrigerator according to claim 1, wherein a dew-proof heater is disposed in a U-shaped groove formed by the outer box side wall, the flange portion, and the extension piece in a heat exchange relationship with the outer box surface.

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