JP2009287850A - Refrigerator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a refrigerator preventing leakage of cold air and appearance failure and having excellent quality by making jumping of a door gasket appropriate and preventing lowering of the door gasket when it is used at a lower edge of a door to prevent collision with a step with a double flange. <P>SOLUTION: The door gasket 20 is provided with: a magnet insertion part 27 to which a magnet 31 is inserted; an anchor part 23 for mounting the door gasket 20 on the door back face; a mounting part 33 formed integrally with the anchor part 23; a first bellows part 21 provided between the magnet insertion part 27 and the mounting part 33, positioned on the door outermost side and having an approximately U-shaped cross section protruded toward the door outer side; a second bellows part 22a provided between the magnet insertion part 27 and the mounting part 33, positioned on the door inner side from the first bellows part 21 and having an approximately U-shaped cross section protruded toward the door inner side; and a connecting part 24 for connecting the second bellows part 2a to the mounting part 33. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a refrigerator. More specifically, the present invention relates to a door gasket that performs cold air sealing of a refrigerator door.

  When the door is opened, the conventional refrigerator rotates counterclockwise around the support shaft, and the door gasket gradually moves inward from the state of being in close contact with the double flange of the outer box and is built into the door gasket. The magnet is released away from the double flange.

When the door closes, it rotates clockwise around the support shaft, the door gasket approaches from the inside to the outside of the double flange, the magnet built in the door gasket is adsorbed, and the door gasket adhesion part Is in close contact with the double flange to prevent cold air leakage (see, for example, Patent Documents 1 and 2).
JP 2004-162988 A (6th page, FIG. 6) Japanese Patent Laid-Open No. 8-128776

  However, in the refrigerator described in Patent Document 1, the peripheral length (the length of the curve in the cross section) of the door inner bellows portion is made longer than the door outer bellows portion of the door gasket, and the door inner bellows portion has a cross-sectional shape that is easy to extend. Therefore, the inner bellows portion of the door is likely to fall downward due to the weight of the magnet, and a problem arises in that a gap is generated between the door inner plate and the fin of the door gasket, causing cold air to circulate.

  In addition, the conventional refrigerator rotates clockwise around the support shaft when the door is closed, and the door gasket magnet is adsorbed to the double flange from the inside to the outside of the heat insulation box. There is a door gasket outer corner, and there is a step between the double flanges protruding from the inner box of the heat insulation box.

  In the conventional refrigerator, when the door gasket jumps to the double flange, the door closes due to the sectional shape of the outer bellows portion of the door that is longer than the inner bellows portion of the door (the length of the curved line in the cross section). Sometimes the outer corner of the door gasket door tends to approach the double flange.

  Further, when the clearance between the heat insulating box and the door is small, or when the door gasket is high, the door gasket door outer corner may collide with the step of the double flange. When the door is further closed, the door gasket contact portion is caught inside the double flange, and when the door is closed, the door gasket contact portion does not contact the double flange, causing problems such as cold air leakage and appearance defects. Occurs.

  This invention has been made to solve the above-described problems. When the door gasket is made to fly properly and used on the lower side of the door, the door gasket is less likely to be lowered. An object of the present invention is to provide a refrigerator with excellent quality that does not collide with a step and has no cold air leakage and appearance defects.

The refrigerator according to the present invention has a magnet that is attracted to the periphery of the opening of the heat insulation box, and a refrigerator in which a door gasket made of a soft resin that prevents outflow of cool air inside the cabinet is attached to the back of the door,
The door gasket is
A magnet insertion part for inserting the magnet;
An anchor portion for attaching the door gasket to the back surface of the door;
An attachment part formed integrally with the anchor part;
A telescopic first bellows portion provided between the magnet insertion portion and the attachment portion, located on the outermost side of the door, having a substantially U-shaped cross section and projecting toward the outer side of the door; ,
Extendable and retractable, provided between the magnet insertion portion and the mounting portion, located inside the door from the first bellows portion, having a substantially U-shaped cross-section and projecting toward the inside of the door A second bellows,
A linking portion that connects the second bellows portion to the attachment portion is provided.

  The refrigerator according to the present invention includes a connecting portion that connects the second bellows portion to the mounting portion, so that the door gasket located on the lower side of the door is less deformed by its own weight than the conventional door gasket, and the door A gap is formed between the gasket and the door, and it is possible to avoid the outflow of cold air to the outside of the cabinet.

Embodiment 1 FIG.
1 to 6 show the first embodiment, FIG. 1 is a perspective view of the refrigerator, FIG. 2 is a perspective view seen from the front side of the right door 5 of the refrigerator compartment, and FIG. 3 is a ZZ cross section of FIG. 4 is a sectional view of the door gasket 20, FIG. 5 is a sectional enlarged view of the vicinity of the door gasket 20 in the middle of closing the refrigerator compartment right door 5, and FIG. 6 is a door gasket 20 at the lower side of the refrigerator compartment right door 5. It is the schematic of the deformation | transformation by dead weight. FIG. 7 is a schematic view of deformation due to the weight of the door gasket 20 on the lower side of the conventional refrigerator right door 5 shown for comparison.

  The configuration of an example of the refrigerator 100 will be described with reference to FIG. The refrigerator 100 is formed by filling a heat insulating material between a steel plate outer box 1 and a resin inner box 2 (see FIG. 3), and has a box-shaped heat insulation having an opening on one side (front surface). A box 30 is provided. The inside of the heat insulation box 30 is partitioned into a plurality of chambers by a partition member.

  The refrigerator 100 shown in FIG. 1 is an example partitioned into five rooms. A refrigerator room is formed in the upper part, an ice making room on the left side of the center, a freezer room on the lower left side, and a vegetable room on the lower right side. In this specification, left and right are defined as left and right when the refrigerator 100 is viewed from the front.

  The door of the refrigerator compartment located in the upper part of the refrigerator 100 is a rotary door, and is a double door separated into left and right refrigerator compartment left doors 4 (an example of doors) and refrigerator compartment right doors 5 (an example of doors).

  The ice making room door 6 (an example of a door) located on the left side of the center of the refrigerator 100 is also a rotary door.

  The freezer compartment door 7 (an example of a door) located on the lower left side of the refrigerator 100 is also a rotary door.

  The vegetable compartment door 8 (an example of a door) located on the lower right side of the refrigerator 100 is also a rotary door.

  The refrigerator 100 generates cold air that cools each chamber by a refrigeration cycle using a compressor (not shown). In an evaporator (not shown) of the refrigeration cycle, cold air is generated by heat exchange between the refrigerant and air. At this time, moisture in the air condenses in the evaporator and eventually becomes frost. The frost adhering to the evaporator is periodically melted using, for example, an electric heater in order to maintain the performance of the evaporator, and stored in an evaporating dish (not shown). For example, the defrost water stored in the evaporating dish is heated and evaporated by a condenser of a refrigeration cycle.

  The evaporating dish is disposed at the bottom of the refrigerator 100. In order to prevent the evaporating dish from being seen from the outside, an evaporating dish cover 9 is provided on the front surface of the lowermost evaporating dish of the refrigerator 100.

  With reference to FIG. 2, the structure of the refrigerator door right door 5 which is one of the doors of the refrigerator 100 will be described. Since the other doors have the same configuration, description thereof is omitted.

  The refrigerator compartment right door 5 includes a steel door outer plate 11 constituting the front design surface, a resin door inner plate 12 (see FIG. 3) constituting the door inner surface, and one side of the left end of the door outer plate 11. First, a door box body whose upper and lower ends are opened is formed by the handle 13 that is fitted into the handle.

  Next, the upper door cap 14 is attached to the upper end of the door box with the upper and lower ends opened, and the lower door cap 15 is attached to the lower end of the door box to form the door box.

  Furthermore, the inside of the door box body is filled with a foam heat insulating material to form a door heat insulating box body of the refrigerator compartment right door 5. The other parts (door gasket 20 (see FIG. 3) and the like) are attached to the door heat insulation box to complete the refrigerator door right door 5.

  As shown in FIG. 3, the refrigerator compartment right door 5 is attached to the heat insulation box 30 using a hinge (not shown). The refrigerator door right door 5 is opened by rotating counterclockwise (in FIG. 3) about the support shaft 17.

  A door gasket insertion groove 16 into which the door gasket 20 is fitted is provided on the inner side of the outer peripheral edge portion of the door inner plate 12 constituting the refrigerator compartment right door 5. The door gasket insertion groove 16 is formed in a square shape along the outer peripheral edge of the door inner plate 12.

  A door gasket 20 is fitted in the door gasket insertion groove 16 of the door inner plate 12 to prevent the cold air in the refrigerator compartment from flowing out.

  Although the structure of the door gasket 20 will be described later, when the right door 5 of the refrigerator compartment is closed, the magnet 31 incorporated in the door gasket 20 is formed on the front surface of the outer casing 1 made of steel plate of the heat insulating box 30. 3 is struck by magnetic force, and the door gasket contact portion 25 is in close contact with the double flange 3.

  Since the double flange 3 formed on the front surface of the outer casing 1 made of steel plate of the heat insulating box 30 is bent twice, the front end of the double flange 3 protrudes ahead of the front surface of the inner box 2. This portion is referred to as a step 10.

  As a heat source that prevents the double flange 3, which is partially exposed to the inside of the refrigerator compartment, from being cooled on the back of the double flange 3 formed on the front surface of the outer box 1 by the cool air in the refrigerator compartment and causing condensation. A high-temperature refrigerant pipe 32 that is a part of the condenser in the refrigeration cycle is provided. The refrigerant pipe 32 is fitted in the recess of the inner box 2.

  The configuration of the door gasket 20 will be described with reference to FIG. The door gasket 20 is made by extrusion molding of vinyl chloride resin, elastomer resin (an example of soft resin) or the like. The door gasket 20 includes a magnet insertion portion 27 into which a magnet 31 having a substantially rectangular cross section is inserted.

  A surface facing the double flange 3 formed on the front surface of the outer box 1 of the magnet insertion portion 27 is referred to as a door gasket contact portion 25.

  On the opposite side of the magnet insertion portion 27, an anchor portion 23 (attachment portion to the refrigerator door right door 5) to be fitted in the door gasket insertion groove 16 of the door inner plate 12 is provided.

  The base of the anchor part 23 is an attachment part 33 formed in a direction substantially perpendicular to the anchor part 23. The attachment portion 33 is integral with the anchor portion 23.

The magnet insertion part 27 and the attachment part 33 are connected by the bellows parts (1) to (4) which can be expanded and contracted as follows.
(1) 1st bellows part 21
The first bellows portion 21 is formed on the outermost door side. The cross-sectional shape is substantially U-shaped and is convex toward the outside of the door.
(2) 2nd bellows part 22a
The second bellows part 22 a is formed on the door inner side than the first bellows part 21. The cross-sectional shape is a long and narrow U-shape, and is convex toward the inside of the door.
(3) Third bellows portion 22b
The third bellows part 22b is formed so as to surround the second bellows part 22a further inside the door than the second bellows part 22a. Similar to the second bellows portion 22a, the cross-sectional shape is substantially U-shaped and is convex toward the inside of the door.
(4) Connecting part 24
The second bellows part 22 a and the third bellows part 22 b are connected by a connecting part 24. The second bellows portion 22 a and the attachment portion 33 may be directly connected by the connecting portion 24. By providing the connecting portion 24, the fulcrum of deformation of the second bellows portion 22a moves from the connecting portion to the base mounting portion 33 to the connecting portion with the connecting portion 24. Therefore, the amount of deformation of the second bellows portion 22a is smaller than that without the connecting portion 24.

  The thickness of each bellows portion (including the connecting portion 24) (the thickness of the vinyl chloride resin constituting each bellows portion (including the connecting portion 24)) is about 0.3 to 0.4 mm. The thickness of the vinyl chloride resin of the first bellows portion 21 is larger than the thickness of the vinyl chloride resin of other bellows portions. The reason will be described later.

  Further, the circumference in the cross section of the first bellows portion 21 (the total length of the U shape in the cross section) is the circumference in the cross section of the second bellows portion 22a and the third bellows portion 22b (the U shape in the cross section). Shorter than the total length). The reason will be described later.

  A plurality of flexible fin pieces 34 are provided on the inner surface of the third bellows portion 22b. The fin piece 34 abuts against the door inner plate 12 and prevents the cold air from flowing out of the outside of the cabinet when the anchor portion 23 is loosened to create a gap, for example.

  The first bellows portion 21 and the second bellows portion 22a form a bag-like portion.

Here, the essential requirements for the configuration of the door gasket 20 are summarized.
(1) Magnet insertion part 27;
(2) Magnet 31;
(3) anchor portion 23;
(4) mounting portion 33;
(5) first bellows portion 21;
(6) 2nd bellows part 22a;
(7) Tie portion 24.

  That is, the third bellows portion 22b may not be provided. The 3rd bellows part 22b is provided in order to improve the heat insulation inside and outside a store | warehouse | chamber further. When the third bellows portion 22 b is not used, the connecting portion 24 connects the second bellows portion 22 a and the attachment portion 33. Moreover, the fin piece 34 is provided in the 2nd bellows part 22a.

  FIG. 5 is an enlarged partial cross-sectional view of the vicinity of the door gasket 20 in the middle of closing of the refrigerator compartment right door 5. In FIG. 5, an angle formed by the door gasket contact portion 25 of the door gasket 20 and the front surface of the double flange 3 of the outer box 1 is defined as an incident angle θ.

  The circumference in the cross section of the first bellows portion 21 (the total length of the U shape in the cross section) is the circumference in the cross section of the second bellows portion 22a and the third bellows portion 22b (the total length of the U shape in the cross section). ) And the thickness of the vinyl chloride resin of the first bellows portion 21 is thicker than the thickness of the vinyl chloride resin of the other bellows portions. When the closing operation is performed and the magnet 31 of the door gasket 20 jumps to the front surface of the double flange 3 of the outer box 1, the first bellows portion 21 extends in the front direction of the double flange 3 of the outer box 1. While being suppressed, the second bellows part 22a and the third bellows part 22b extend.

  Therefore, when closing the refrigerator door right door 5, the possibility that the door gasket outer corner portion 26 of the door gasket 20 collides with the step 10 of the double flange 3 of the outer box 1 is reduced.

  Further, by suppressing the first bellows portion 21 from extending in the front direction of the double flange 3 of the outer box 1, the door gasket 20 of the door gasket 20 and the front surface of the double flange 3 of the outer box 1 are suppressed. The incident angle θ, which is the angle formed by As a result, the timing at which the door gasket contact portion 25 contacts the front surface of the double flange 3 of the outer box 1 is delayed. Therefore, the movement amount to the door outer side after the door gasket contact | adherence part 25 closely_contact | adheres to the front surface of the double flange 3 of the outer box 1 becomes small. When the movement amount is small, the door gasket 20 is not easily twisted, the sliding distance of the door gasket contact portion 25 is reduced, and the sliding noise can be reduced.

  The circumference of the first bellows portion 21 in the cross section (the total length of the U-shape in the cross section) is the circumference of the second bellows portion 22a and the third bellows portion 22b (the U shape in the cross section). And the thickness of the first bellows portion 21 is thicker than the thickness of the other bellows portions, so that the operation of closing the right refrigerator door 5 is performed. When the magnet 31 of the gasket 20 jumps to the front surface of the double flange 3 of the outer box 1, the first bellows portion 21 is restrained from extending in the front direction of the double flange 3 of the outer box 1, and the first The second bellows portion 22a and the third bellows portion 22b extend, but the second bellows portion 22a and the third bellows portion 22b extend too much, and the incident angle θ (see FIG. 5) becomes negative, and the door gasket contact portion On the contrary, there is a possibility that the timing at which 25 is brought into close contact with the front surface of the double flange 3 of the outer box 1 is accelerated.However, since there is a connecting portion 24 that connects between the second bellows portion 22a and the third bellows portion 22b or between the second bellows portion 22a and the mounting portion 33, the second bellows portion 22a, the second bellows portion 22a, If the third bellows portion 22b extends too much, the incident angle θ becomes negative, and it can be avoided that the timing at which the door gasket contact portion 25 contacts the front surface of the double flange 3 of the outer box 1 is shortened.

  The door gasket 20 located on the lower side of the right refrigerator door 5 is greatly deformed by the weight of the magnet 31.

  FIG. 7 shows a modification of the door gasket 20 located on the lower side of the conventional refrigerator right door 5 shown for comparison. Since the conventional door gasket 20 does not connect the second bellows part 22a and the third bellows part 22b or the second bellows part 22a and the attachment part 33 by the connecting part 24, the magnet It is greatly deformed by its own weight.

  Therefore, a gap is formed between the fin piece 34 and the door inner plate 12, and the outflow of cold air to the outside occurs.

  The door gasket 20 of the present embodiment connects the second bellows part 22a and the third bellows part 22b or the second bellows part 22a and the attachment part 33 with a connecting part 24. . When the connecting portion 24 is not provided, the second bellows portion 22a is deformed with the connecting portion to the base mounting portion 33 as a fulcrum, but when the connecting portion 24 is provided, the second accordion portion 22a has a deformation supporting point. Then, it moves from the connecting portion to the base mounting portion 33 to the connecting portion with the connecting portion 24. Therefore, as shown in FIG. 6, compared to the conventional door gasket 20, the door gasket 20 located on the lower side of the refrigerator door right door 5 is less deformed, and a gap is formed between the fin piece 34 and the door inner plate 12. It is possible to avoid the outflow of cold air to the outside.

  As described above, according to the present embodiment, the circumference of the first bellows portion 21 in the cross section (the total length of the U-shape in the cross section) is set to the second bellows portion 22a and the third bellows portion 22b. Since it is shorter than the circumferential length in the cross section (the total length of the U-shape in the cross section), and since the thickness of the first bellows portion 21 is thicker than the thickness of the other bellows portions, it is refrigerated. When the operation of closing the room right door 5 is performed and the magnet 31 of the door gasket 20 jumps to the front surface of the double flange 3 of the outer box 1, the front surface of the double flange 3 of the outer box 1 of the first bellows portion 21. As the second bellows part 22a and the third bellows part 22b extend, the door gasket outer corner 26 of the door gasket 20 is exposed to the outside when the right door 5 is closed. The possibility of colliding with the step 10 of the double flange 3 of the box 1 is reduced.

  Further, since there is a connecting portion 24 that connects between the second bellows portion 22a and the third bellows portion 22b or between the second bellows portion 22a and the attachment portion 33, the second bellows portion 22a, It is possible to avoid the timing at which the accordion portion 22b of the No. 3 is extended too much and the incident angle θ becomes negative and the door gasket contact portion 25 comes into close contact with the front surface of the double flange 3 of the outer box 1 on the contrary.

  Further, by suppressing the first bellows portion 21 from extending in the front direction of the double flange 3 of the outer box 1, the door gasket 20 of the door gasket 20 and the front surface of the double flange 3 of the outer box 1 are suppressed. When the incident angle θ, which is an angle between the door gasket and the door gasket, the timing at which the door gasket contact portion 25 contacts the front surface of the double flange 3 of the outer box 1 is delayed. Accordingly, the amount of movement to the outside of the door after the door gasket contact portion 25 is in close contact with the front surface of the double flange 3 of the outer box 1 is reduced, the door gasket 20 is not easily twisted, and the door gasket contact portion 25 slides. The distance can be reduced and the sliding noise can be reduced.

  Moreover, since the door gasket 20 has connected between the 2nd bellows part 22a and the 3rd bellows part 22b, or between the 2nd bellows part 22a and the attachment part 33 with the connection part 24, it is conventional. The door gasket 20 located on the lower side of the right door 5 of the refrigerator compartment is less deformed than the door gasket 20 of this type, and there is a gap between the fin piece 34 and the door inner plate 12 so that cold air flows out of the cabinet. Can be avoided.

  In the above description, as an example of the refrigerator 100, the refrigerator is partitioned into five chambers, and a refrigerator compartment is formed in the upper part, an ice making room in the central left side, a freezing room in the lower left side, and a vegetable room in the lower right side. Although explained, the form of a refrigerator is not ask | required. Any form of refrigerator may be used.

  Further, although the rotary door has been described as an example, the present embodiment can also be applied to a drawer door.

  Further, the door gasket 20 has an anchor portion connecting the connecting portion 24 connecting the second bellows portion 22a and the third bellows portion 22b or between the second bellows portion 22a and the mounting portion 33. Although it is provided on the upper side of 23 (see FIG. 4), it may not be on the upper side of the anchor portion 23.

  Moreover, although the magnet insertion part 27 is provided in the door outer side rather than the anchor part 23, the position of the magnet insertion part 27 may be anywhere.

  Moreover, although the extrusion molding of the vinyl chloride resin has been described as an example, the present embodiment can be applied to the extrusion molding of the elastomer resin.

FIG. 5 shows the first embodiment and is a perspective view of the refrigerator. FIG. 5 shows the first embodiment, and is a perspective view seen from the front side of the refrigerator door right door 5. FIG. 3 shows the first embodiment, and is a partially enlarged view of the ZZ cross section of FIG. FIG. 3 shows the first embodiment, and is a cross-sectional view of the door gasket 20. FIG. 5 is a diagram showing the first embodiment, and is a partially enlarged cross-sectional view in the vicinity of a door gasket 20 in the middle of closing of the refrigerator door right door 5. FIG. 5 shows the first embodiment, and is a schematic view of deformation due to the weight of the door gasket 20 on the lower side of the right refrigerator door 5. The schematic of the deformation | transformation by the dead weight of the door gasket 20 in the lower side of the conventional refrigerator right door 5 shown for a comparison.

Explanation of symbols

  1 outer box, 2 inner box, 3 double flange, 4 refrigerator compartment left door, 5 refrigerator compartment right door, 6 ice compartment door, 7 freezer compartment door, 8 vegetable compartment door, 9 evaporating dish cover, 10 steps, 11 door Outer plate, 12 Door inner plate, 13 Handle, 14 Door upper cap, 15 Door lower cap, 16 Door gasket insertion groove, 17 Support shaft, 20 Door gasket, 21 First bellows portion, 22a Second bellow portion, 22b 3rd bellows part, 23 anchor part, 24 joint part, 25 door gasket adhesion part, 26 door gasket outer corner part, 27 magnet insertion part, 30 heat insulation box, 31 magnet, 32 refrigerant piping, 33 attachment part, 34 fin One piece, 100 refrigerator.

Claims (5)

In a refrigerator that has a magnet that adsorbs to the periphery of the opening of the heat insulation box, and that is attached to the back of the door with a soft resin door gasket that prevents outflow of cool air inside the cabinet,
The door gasket is
A magnet insertion part for inserting the magnet;
An anchor portion for attaching the door gasket to the back surface of the door;
An attachment part formed integrally with the anchor part;
A telescopic first bellows portion provided between the magnet insertion portion and the attachment portion, located on the outermost side of the door, having a substantially U-shaped cross section and projecting toward the outer side of the door; ,
Extendable and retractable, provided between the magnet insertion portion and the mounting portion, located inside the door from the first bellows portion, having a substantially U-shaped cross-section and projecting toward the inside of the door A second bellows,
A refrigerator comprising a connecting portion that connects the second bellows portion to the attachment portion.   An expansion / contraction that is located further inside the door than the second bellows portion, is formed so as to surround the second bellows portion, has a substantially U-shaped cross-section, and is convex toward the inside of the door The refrigerator according to claim 1, further comprising a free third bellows portion.   3. The refrigerator according to claim 2, wherein the connecting portion connects the second bellows portion and the third bellows.   The refrigerator according to any one of claims 1 to 3, wherein a circumference of the first bellows portion in a cross section is shorter than a circumference of the second bellows portion or the third bellows. .   5. The thickness of the soft resin of the first bellows portion is made thicker than the thickness of the soft resin of the second bellows portion or the third bellows portion. Refrigerator.

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