JPH10259983A - Refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain a heat insulating property, durability and a property of design together at a high level by a method wherein the tips of fins positioned on the innermost side of a packing in respect to a refrigerator is brought into close contact with an inside-door plate of a door by bonding or fixing. SOLUTION: A packing 4 made mainly of soft vinyl chloride is fixed in a packing fixing groove 11 provided in the periphery of the rear of a box body 2 being opposite to the front thereof, in such a manner that a fixing part 4d of the base thereof is fitted in the groove. The packing 4 has a structure wherein a closing part 4a forming the surface near to the outside of a refrigerator comes into close contact with the front of the box body 2 to which it is opposed, by utilizing a magnetic force acting in a magnet 4b provided just inside the closing part 4a and in an outer box 5 of the box body 2 and also the elastic deformation in the height direction of the packing given by an air chamber formed inside, so that it may function for sealing when a door 3 is closed. Fins 4e formed on the in-refrigerator side of the pacing 4 comes into contact with the surface of an inner plate 10 of the refrigerator and functions for enhancing a heat insulating property in the width direction of the packing 4, together with the air chamber 4c formed inside the packing, due to air layers partitioned by these parts.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerator, and more particularly to a refrigerator in which cold air in a refrigerator is sealed by a packing provided between a box and a door.

[0002]

2. Description of the Related Art In general, refrigerators can be broadly classified into a heat-insulating container and a box and a door, which function as strength members, and a refrigeration cycle for cooling the inside of the refrigerator. In recent years, in order to reduce the power consumption of refrigerators, which has been strongly demanded in recent years, it is required to further improve the heat insulation performance of the box and the door together with the efficiency of the refrigeration cycle. It has become an important technical issue in the field. In order to improve the heat insulation performance of the box and door, it is necessary to reduce the amount of heat entering from outside through the wall of the box and door and the amount of heat entering around the packing provided between the box and the door. There is. The ratio of these heat infiltration amounts can be found in ASRAE Transactions (1994) 1351 to 1358 (ASHRAE
According to Trans. (1994) pp 1351-1358), it is estimated to be about 3 to 1, and the number is larger when passing through the wall of the former box or door because the surface area related to heat intrusion is larger.

However, urethane foam or vacuum heat insulating material having high heat insulating performance is already used inside the box or door, and an increase in wall thickness leads to a decrease in the internal volume of the container. Reduction of the amount of heat penetration tends to reach a plateau in terms of technology and cost. On the other hand, the amount of heat intrusion from around the packing is smaller than that of the former as described above, particularly because the surface area (cross-sectional area of the heat intrusion path) related to heat intrusion is small.

[0004] However, the packing and its surroundings are structurally and functionally restricted, so that the heat insulation performance per surface area is considerably lower than that of the former, and the amount of heat penetration of the former has been reduced, and the packing tends to reach a plateau. In one recent year,
In view of the technology and cost, attention has been paid to the reduction of the latter amount of heat penetration.

[0005] In order to reduce the amount of heat intrusion from the packing and its surroundings, several proposals have been made to improve the structure of a single packing.
As disclosed in Japanese Patent No. 1077 (Document 1), the packing 4 is made of a soft foamed resin having a specific cell structure and an excellent compression recovery rate instead of soft vinyl chloride, thereby improving the adhesion performance. There is also an attempt to lower the thermal conductivity of the material.

As another improvement of the single packing structure, a heat insulating performance is improved by inserting a soft urethane foam into the air chamber 4c of the packing as disclosed in JP-A-4-369377 (Document 2). And Japanese Patent Application Laid-Open
No. 3,371,786 (Reference 3),
In some cases, the heat insulation performance is improved by increasing the number of partitions of the air chamber provided in the packing and subdividing the partitions.

Further, a structure called a double packing structure is known as an improvement for reducing the amount of heat penetration by paying attention not only to the improvement of the packing alone but also to the periphery thereof. . This is to add a second packing of another element to the inside of the warehouse from the existing packing.
Regarding the improvement of the heat insulation performance by the double packing structure, an experimental result (Reference 4) is shown in the above-mentioned ASH AEA Transactions (1994), and the inside of the door, which is inside the packing from the packing, is shown. By further sealing the gap between the surface of the plate protruding inside the box and the surface of the inner box with heat insulating tape (made of soft foamed resin), the heat insulating performance of the packing and its surroundings is improved, and the power consumption of the refrigerator is reduced. This is a great effect of reducing by 3 to 7%.

Further, the second to fourth of the double packing structure
Japanese Patent Application Laid-Open No. 6-88669 (Reference 5), Japanese Patent Application Laid-Open No. 6-180179 (Reference 6), and Japanese Patent Application Laid-Open No. 6-180180 (Reference 7) disclose an improvement plan. The one described in Document 5 further includes a second packing attached to the inner side of the packing installed on the door inner plate on the four sides of the back of the door, which is closely adhered to the packing by elastic deformation of the packing. Packing and second on the outside and inside
The structure described in Document 6 is a structure in which the seal is sealed with a packing. A packing is additionally provided, and the surfaces of the front four sides of the box body and the inner box inside the refrigerator from the front side are sealed with packing and a second packing, respectively. For the partition between the storage compartments above and below the body,
Separately from the packing, a fin-shaped second packing is additionally provided on the partition inner plate on the inner side of the box from the front of the box, and the partition outer plate and the door inner plate of the door on the inner side of the box on the four sides of the front of the box are provided. The surface of the protruding portion is sealed with a packing and a second packing, respectively.

[0009]

In the method described in Document 1, the decrease in the thermal conductivity of the entire packing is smaller than that of the material of the packing because the air chamber and the magnet are not changed. Further, since the packing and its surrounding structure are not changed, the disadvantage that the effective path length is small and the cross-sectional area of the path is large is not improved.
Accordingly, the effect of reducing the amount of heat penetration by this method, that is, the effect of improving the heat insulating performance of the packing and its peripheral portion is small.

According to the proposal described in Document 2, the heat conductivity of the flexible urethane foam is larger than that of still air;
According to the plan described in Document 3, even if the air chamber is slightly subdivided, the thermal conductivity of the entire packing does not change much.
In addition, the structure other than the inside of the packing is the same, but the other drawbacks in heat invasion do not change. Therefore, these methods do not have the effect of reducing the amount of heat penetration, that is, the effect of improving the heat insulating performance of the packing and its surroundings.

Further, the second packing used in Reference 4 which describes a so-called double packing is a bare heat insulating tape, and has a clearly poor design and is not practical. The second packing is provided so as to seal the gap between the surface of the protruding portion of the door inner plate toward the inside of the refrigerator and the surface of the inner box. When the door is opened and closed, the packing is compressed and expanded in the height direction. When the door is closed, the surface, that is, the closed portion is slid to the opposite surface. In the case of the second packing made of a soft foamed resin, there is little problem of compression and extension deformation, but there is a high possibility that problems such as abrasion and damage occur when considering the low temperature for surface sliding. The second packing used in (1) also has a problem in durability.

[0012] The second packing described in Document 5 is arranged on the inner side of the door immediately next to the packing and installed on the door inner plate on the four sides of the back of the door, and seals the four sides of the front face of the box like the packing. The width of the front face of the box is small, and it is impossible to arrange separate packings side by side here. For this reason, the second packing is thin and narrow. In such a case,
The rate of change of the height of the packing due to the opening and closing operation of the door, that is, the distortion in the height direction is very large in the thin second packing as compared with the thick packing, so that the thin packing of the bent packing is broken. A problem on the durability of the device appears. In addition, if the thickness of the second packing is reduced to suppress the distortion in the height direction in consideration of the durability, the problem that the followability of the packing surface is reduced, the sealing function is weakened, and the heat insulation performance is reduced is conversely exhibited. Therefore, it is difficult to achieve both high heat insulation performance as a double packing structure and durability of the second packing.

[0013] In the technique disclosed in Document 5 having a double packing structure, when the door is closed, the second packing is fixed to a protruding portion of the door inner plate toward the inside of the storage, and the opposing inner box is fixed. The closed part comes into contact with the surface of. Since the gap between the surface of the protruding portion of the door inner plate toward the inside of the compartment and the surface of the inner box is narrow, the elastically deformable portion (the portion having an air chamber formed inside) excluding the fixing portion of the second packing is removed. The thickness must be particularly thin, and the problem of the durability of the second packing due to an increase in distortion occurs as in the method of Reference 4. Also, making the second packing thinner in terms of durability involves a decrease in heat insulation performance as in Reference 4, and it is difficult to achieve both heat insulation performance and durability with this method.

Further, in Document 6, the closing portion of the second packing is formed as a single long fin-shaped member obliquely protruding from the front surface of the box to the partition inner plate inside the storage, and the storage of the door inner plate is formed. The tip of the fin comes into contact with the surface of the inwardly protruding portion to perform a sealing action. In order to keep the long fin-shaped part durable, the fixing part of the second packing is now approximately 4
It is considerably wide along the surface of the partition inner plate, which crosses at 5 °, and the material of the entire second packing is also made of soft vinyl chloride or synthetic rubber. The configuration in which the vicinity of the front surface of the partition inner plate made of resin such as ABS is considerably covered with the fixing portion of the second packing made of a material having a lower gloss and texture is problematic in terms of design. It is also conceivable to improve the design by making the fixing portion of the second packing narrow as in Document 5, but the deformed portion of the second packing becomes thinner by the thickness of the fixing portion. It is not preferable because the same problem of durability as in the improvement plan appears. Therefore, in this method, there is a problem that it is difficult to achieve both durability and design of the second packing, even if high heat insulation performance can be ensured by the double packing structure.

Another problem common to the above-mentioned conventional proposals for improving the double packing structure is that the second packing is installed due to poor shape accuracy of the second packing, deformation with time, or wear of the closed portion. If the air-tightness is reduced even in a part of the four circumferences, the cold air in the refrigerator flows into the air layer between the packing and the second packing, and the temperature decreases and the thermal conductivity increases (convection increases This increases the value of the still air by several to ten times), which considerably impairs the heat insulating effect. Although it is expected that the reduction in the airtightness of the second packing will occur considerably if it is limited to a part, it is not considered in the above-mentioned respective improvement plans of the double packing structure, and is an effective countermeasure for the reduction in the heat insulation performance due to the reduction. Is also not shown.

From the above, in the conventional refrigerator in which the cold air in the refrigerator is sealed by the packing provided between the box and the door, regardless of whether it has a single packing structure or a double packing structure, There is no packing and its peripheral parts that can achieve a high level of durability and design at the same time as heat insulation performance suitable for each structure.

An object of the present invention is to provide a refrigerator provided with a packing and its peripheral portion capable of simultaneously achieving a high level of heat insulation performance, durability and design.

[0018]

SUMMARY OF THE INVENTION An object of the present invention comprises a box, one or more doors corresponding to storage compartments formed in the box, and packings provided around the back of the door. In the refrigerator, when the door is closed, at least four rounds of the front surface of the storage compartment of the box and the surface of the packing come into contact with each other to seal the cold air inside the box, This is achieved by adhering or fixing the tip of the fin located on the innermost side of the container to the door inner plate of the door.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of the packing and its peripheral parts in the refrigerator, the state of heat intrusion into them from the outside, and the problems related to the reduction of the amount of heat infiltration will be specifically described with reference to the drawings. FIG. 25 is a perspective view of the entire conventional refrigerator, in which a part of the door is opened so that the arrangement of the packing can be understood. FIG. 26 is a partial cross-sectional view of the vicinity of the packing with the door closed, of the refrigerator having the conventional packing, and FIG. 27 is a similar view of the refrigerator having the conventional packing and the second packing. It is sectional drawing.

In FIG. 25, the refrigerator 1 is basically composed of a box 2 having storage compartments formed therein, and a door 3 corresponding to the front of each storage compartment. It is opened and closed in the form of sliding by rails. Packing 4 is installed on the four sides of the back surface of the door 3, and the surface thereof comes into contact with the four sides of the front surface of the storage compartment of the opposing box 2 when the door 3 is closed, and the cool air in the refrigerator leaks out. In addition to maintaining the airtight state so as not to have a flat cross-sectional shape and having an air chamber inside, the width direction (from the outer side surface exposed to external air to the inner side surface exposed to cold air in the interior) Direction), the amount of heat penetration can be kept low.

FIG. 26 shows an example of a household refrigerator having a structure having a single packing structure in which each storage compartment is sealed with only one packing. It shows the details of the structure. In the description of the structure of the packing and its peripheral parts up to the embodiment of the present invention including this example, the object is limited to the packing between the upper, lower, left and right outer peripheral walls and the door of the simple box having the entire structure. The packing is installed between the partition wall and the door between the storage compartments arranged above and below the box in addition to the outer peripheral wall,
In this case, the two packings installed on the upper and lower doors are arranged side by side on a single partition wall, but the overall structure is slightly complicated. And can be similarly considered as an object related to the invention. In the following description, the typical structure and material of the current home refrigerator are shown. However, the description up to the embodiment of the present invention including this example also shows a new structure (such as resin material and vacuum insulation). Use the flexibility of the packing, even if the structure and material of some parts are different, such as refrigerators for large-scale use of materials and for commercial use (the doors keep the closed state of latches, etc.) If the function as a packing for sealing between the box and the door is the same, it can be similarly considered as an object related to the invention.

The outer peripheral wall of the box 2 has a structure in which an outer box 5 made of a steel plate and an inner box 6 made of a resin are integrated with each other mainly with a heat insulating member 7 made of hard urethane foam interposed therebetween. A dew-prevention heater 8 for preventing dew condensation on the surface of the outer box 5 is provided inside the outer side of the front side of the box opposite to the back side of the box. Door 3
Is a structure in which a door outer plate 9 mainly made of a steel plate and a door inner plate 10 made of a resin are integrated with a heat insulating member 7 made of a hard urethane foam interposed therebetween. The packing 4 mainly made of soft vinyl chloride is fixed to the packing fixing groove 11 on the four sides of the back surface facing the front surface of the box body 2 so as to fit the root portion thereof. When the door 3 is closed, the packing 4 is provided with a magnet 4b provided immediately inside the closing portion 4a and an outer box 5 (Ferromagnetic material because it is made of steel) and the air chamber 4 inside
By using the elastic deformation in the height direction of the packing which is enlarged by forming c, the closing portion 4a, which is the surface close to the outside of the refrigerator, is in close contact with the front surface of the opposing box body 2. The base of the packing 4 is integrally formed with the arrowhead-shaped fixing portion 4d and fixed to the above-mentioned packing fixing groove 11, and the fin 4e formed on the inner side surface of the packing 4 contacts the surface of the door inner plate 10. The air layer in the space A defined by them works together with the air chamber 4c inside the packing to enhance the heat insulation performance of the packing 4 in the width direction.

If the packing 4 has good airtightness and there is no leakage of cool air in the refrigerator when the door 3 is closed, heat infiltration from the packing and its surroundings into the refrigerator from the outside is caused by (1) the width of the packing. This is mainly caused by heat conduction in the direction of (2) the direction along the surface of the box, and (3) the direction along the back surface of the door. In the case of the current home refrigerator, the dimensions of the packing and its surroundings and the thermal conductivity are such that the width of the packing 4 is 20-4.
0 mm (including the fin portion, close to the path length of (1) and (2)), and the width of the closing portion 4a of the packing 4 is about 10 mm
(Close to the path length of (3)), the height of the packing 4 is about 1
0 mm, the gap between the protruding portion of the surface of the door inner plate 10 toward the inside of the refrigerator and the surface of the inner box 6 is about 5 mm (the sliding door 3 may have a small amount of protrusion of the door inner plate 10 into the refrigerator). The thin part of the packing 4 has a thickness of 0.5 to 1 mm and a thermal conductivity of 0.21 W / mK (value near 0 ° C. of soft vinyl chloride, temperature conditions are also common), the outer box 5 and the door Outer plate 9 is about 0.5 mm and 58 W / mK (steel), inner box 6 and door inner plate 10
Are 0.5-1 mm and 0.1-0.2 W / mK (resin),
The wall part of the box 2 and the door 3 is 30 to 40 mm and about 0.01
6 W / mK (hard urethane foam), and the thermal conductivity of the air chamber 4c and the air layer in the space A are about 0.024 W / mK (value of still air).

Regarding the path (1), the width of the packing 4, which is considered to be the original path length, is relatively large. However, actually, on the root side of the packing 4, only the fins 4e inside the refrigerator are in contact with the surface of the door inner plate 10, so that leakage of the cold air 12 in the refrigerator into the space A and the fixed part 4d is not caused. And a magnetic force is applied to the inner surface of the packing 4 by folding back of the outer box 5 which is turned around the inside of the storage to magnetize the magnet 4b on the surface side of the packing 4. Space B
It is believed that the effective path length on both sides is significantly reduced due to the cold air 12 flowing into the refrigerator. The thermal conductivity of the packing as a whole is as follows: the air chamber 4c, the thin portion, and the magnet 4b (a rubber magnet having a thermal conductivity of about 1 W / m).
K), which is a little small because it is in the middle of K), but the cross-sectional area of the path (the surface area of the heat penetration portion) is a product of the height of the packing 4 and the length of the circumference where the packing 4 is installed, and is large. Since the amount of heat penetration of each path is inversely proportional to the length of the path and proportional to the thermal conductivity and the cross-sectional area, the amount of heat penetration from the path of (1) is 3
It is thought that there are many in one route.

With respect to the route (2), the outside of the refrigerator (in a state of being exposed to outside air) and the inside of the refrigerator (where the cool air 12 flows into the refrigerator) from the portion where the closing portion 4a of the packing 4 of the outer box 5 contacts. It is conceivable that heat enters the space B) mainly due to heat conduction inside the plate of the outer box 5. The length of the path is almost
a, and the thickness of the outer box 5 is small (the product of the circumference of the packing is the cross-sectional area of the path), but the thermal conductivity is quite large. It is considered that the amount of heat infiltration from the substrate is as large as in the route (1). In addition, since the dew-prevention heater 8 is installed inside the outer box 5 near this path, a part of the heat is also transferred to the inside of the refrigerator by this path, so that the amount of heat penetration increases.

The route (3) is considered to mainly enter the heat along the surface of the base portion of the packing 4 by heat conduction inside the door inner plate 10. In this path, the effective path length is smaller than it should be due to the above-described leakage into the cold air 12 fixing portion 4d in the refrigerator. Because the rate is quite small,
Taken together, it is considered that the amount of heat penetration from this route is smaller than the other routes.

As described above, since the amount of heat penetration from the packing and its peripheral portion in the conventional refrigerator is large not only in the width direction of the packing 4 but also in the direction along the surface of the box body 2, it has already been described in total. It is considered that the value has reached a large value of about 1/4 of the heat penetration amount of the entire refrigerator.

In order to reduce the amount of heat penetration from such a packing and its surroundings, several proposals for improving the structure of a single packing have been conventionally proposed, one of which is disclosed in JP-A-63-311077. As disclosed, the material of the packing 4 is not a soft vinyl chloride but a soft foamed resin having a specific cell structure and an excellent compression recovery rate, thereby lowering the thermal conductivity of the material while improving the adhesion performance. There are things that try to do that. As can be seen from the above description, it is considered that the amount of heat entering from the path (2) tends to decrease due to the reduction in the thermal conductivity of the packing 4, but the reduction in the thermal conductivity of the packing as a whole is due to the air chamber 4c and the air chamber 4c. Since the portion of the magnet 4b does not change, the packing material is reduced compared to the reduction in the material of the packing, and the structure of the packing and its surroundings does not change, so that the disadvantage that the effective path length is small and the cross-sectional area of the path is large is also improved. Never. Therefore,
It is considered that the effect of reducing the amount of heat infiltration by this method, that is, the effect of improving the heat insulating performance of the packing and the surrounding area is small, and this method has not been practically used.

Further, as another improvement plan of the single packing structure, as disclosed in Japanese Patent Application Laid-Open No. 4-369377, a soft urethane foam is inserted into the air chamber 4c of the packing to improve the heat insulation performance. JP-A-4-37
As disclosed in Japanese Patent Publication No. 1786, there is a method of improving the heat insulation performance by increasing the number of partitions of the packing air chamber 4c and subdividing it. Referring to the above description of heat penetration, in these improvement plans, in the former case, the thermal conductivity of the flexible urethane foam (0.03 to 0.03
0.04 W / mK) is larger than the value of still air (about 0.024 W / mK as described above). In the latter case, even if the air chamber 4c is somewhat subdivided, the thermal conductivity of the entire packing is not so large. It is considered that there is no improvement in both because there is no change, and since there is no change in the structure other than the inside of the packing, which is common to both, there is no change in other heat penetration defects. Therefore, it is considered that these methods do not have the effect of reducing the amount of heat infiltration, that is, the effect of improving the heat insulating performance of the packing and its peripheral portion.

However, even in the above-mentioned conventional improvement plan of the single packing structure, there is no particular problem regarding the durability and the design if the selection of the target packing and the members and structures for the improvement are considered. It can be.

Further, the present invention is not limited to the improvement of the packing alone, but also focuses on the peripheral portion thereof to improve the heat intrusion amount. In some cases, a second packing of another element is added. As to the improvement of the heat insulation performance by the double packing structure, experimental results are shown in the above-cited ASH AA Transactions (1994). By further sealing the gap between the surface of the protruding portion toward the inside of the refrigerator and the surface of the inner box 6 with a heat insulating tape (made of a soft foamed resin), the heat insulating performance of the packing and its peripheral portion is improved, and the power consumption of the refrigerator is reduced by 3%. This is a great effect of reducing by about 7%. Such a double packing structure greatly improves the heat insulation performance by forming a closed air layer between the packing 4 and the second packing, thereby achieving the single packing structure described in the above description regarding heat penetration. (1) The width of the packing in the width direction and (2) the amount of heat infiltration in the direction along the surface of the box is reduced by suppressing the inflow of cool air inside the refrigerator, and the heat insulation effect by the closed air layer is newly improved. By being added to However, the second packing used in this experiment is a bare heat-insulating tape, and has a clearly poor design and is not practical. Also,
The second packing is provided so as to seal a gap between the surface of the protruding portion of the door inner plate 10 toward the inside of the storage and the surface of the inner box 6. When the door 3 is opened and closed, the packing is compressed in the height direction. The surface or the closed portion is slid to the opposing surface in the vicinity of the closed state of the door while being extended. In the case of the second packing made of a soft foamed resin, there is little problem of compression and extension deformation, but there is a high possibility that problems such as abrasion and damage occur when considering the low temperature for surface sliding. The second packing used in (1) also has a problem in durability.

Second to fourth conventional double packing structures
Japanese Patent Application Laid-Open Nos. 6-88669 and 6-180179, and 6-1801
No. 80 is disclosed. The second one is further provided with a second packing which is tightly adhered to the inner side of the packing 4 installed on the door inner plate 10 on the back four sides of the door 3 by elastic deformation of the packing. As shown in FIG. 27, the packing 4 and the packing 3 seal the outside of the warehouse and the inside of the warehouse with the packing 4 and the second packing, respectively.
Separately, a second packing 15 is additionally provided on a protruding portion of the door inner plate 10 which is on the inner side of the door and protrudes toward the inner side of the container, and is provided in close contact with the four sides of the front surface of the box 2 and the inner side of the container. The structure in which the surface of the inner box 6 is sealed with the packing 4 and the second packing 15 respectively, and the fourth one is mainly intended for the partition between the upper and lower storage compartments of the box body 2. Separately, a fin-shaped second packing is additionally provided on a partition inner plate on the inner side of the box from the front of the box 2, and the partition outer plate and the door inner plate 10 of the door 3, which constitute the four front sides of the box 2. In this configuration, the surfaces of the inwardly protruding portions are sealed with a packing 4 and a second packing, respectively.

In the second improvement plan of the double packing structure, the second packing is arranged on the inner side of the box immediately next to the packing 4 and installed on the door inner plate 10 on the four sides of the back surface of the door 3. This is a configuration that seals the front four circumferences. The width of the front surface of the box 2 is as narrow as about 30 to 40 mm, which is the same as the thickness of the box 2 already described, and it is somewhat impossible to arrange the separate packing 4 and the second packing side by side here. Also in the embodiment, the second packing is thin and narrow in width by fixing the surface of the door inner plate 10 to a slightly protruding portion. In such a case, the rate of change of the height of the packing due to the opening / closing operation of the door 3, that is, the distortion in the height direction is extremely large in the second packing thinner than the thick packing 4, so that the thin portion of the bent packing is It is considered that there is a problem in durability of the second packing such as breakage of the second packing. In addition, if the thickness of the second packing is reduced to suppress the distortion in the height direction in consideration of the durability, the problem that the followability of the packing surface is reduced, the sealing function is weakened, and the heat insulation performance is reduced is conversely exhibited. Therefore, in this method, it is difficult to achieve both the high heat insulation performance of the double packing structure shown in the above-described experiment and the durability of the second packing.

In the third improvement plan of the double packing structure, as shown in FIG. 27, when the door 3 is closed, the second packing 15 is fixed to the protruding portion of the door inner plate 10 to the inside of the refrigerator. 15c is fixed, and the closed portion 1 is
5a contacts. As described in the above description regarding heat intrusion, since the gap between the surface of the protruding portion of the door inner plate 10 and the surface of the inner box 6 is as small as about 5 mm, the fixing portion 15c of the second packing 15 is The thickness of the elastically deformable portion (the portion in which the air chamber 15b is formed) except for must be particularly thin, and the second packing 15 due to the large distortion as in the second method. It is thought that a problem on the durability of the steel sheet appears. Further, making the second packing thinner from the viewpoint of durability involves a decrease in heat insulation performance as in the case of the second system, so it is understood that it is difficult to achieve both heat insulation performance and durability in this system. Further, the second packing 15
In order to increase the thickness of the refrigerator, it is conceivable to shift the protruding portion of the door inner plate 10 toward the inside of the refrigerator toward the center of the door so as to widen the gap with the surface of the inner box 6. It is not preferable because another problem that the product is reduced appears. However, even in the second and third improvement plans described above, it can be considered that there is no problem with respect to the design property if consideration is given to the selection of the member and structure of the second packing 15 to be added.

In the fourth improvement of the double packing structure, the closed portion of the second packing is formed as a single long fin-shaped one projecting obliquely from the front surface of the box 2 onto the partition inner plate inside the storage. The tip of the fin abuts on the surface of the protruding portion of the door inner plate 10 toward the inside of the refrigerator to perform a sealing action. In order to keep the long fin-shaped part durable, in the embodiment of this improvement plan,
The fixing portion of the packing is considerably wide along the surface of the partition inner plate, which intersects the fin-shaped portion at about 45 °, and the material of the entire second packing is made of soft vinyl chloride or synthetic rubber. The configuration in which the vicinity of the front surface of the partition inner plate made of resin such as ABS is considerably covered with the fixing portion of the second packing made of a material having a lower gloss and texture is problematic in terms of design. It is also conceivable to improve the design by setting the fixed part of the second packing to be narrow as in the third improvement plan, but the deformed part of the second packing becomes thinner by the thickness of the fixed part. Thus, the same problem of durability as in the third improvement plan appears, which is not preferable. Therefore, in this method,
Even if high heat insulation performance can be ensured by the double packing structure, there is a problem that it is difficult to achieve both durability and design of the second packing.

Another problem common to the above-mentioned conventional proposals for improving the double packing structure is that the second packing is installed due to poor shape accuracy of the second packing, deformation over time, or wear of the closed portion. If the airtightness is reduced even in a part of the four circumferences, the cold air in the refrigerator flows into the air layer between the packing 4 and the second packing, and the temperature decreases and the thermal conductivity increases (convection The thermal insulation effect is considerably impaired due to the fact that the value increases several times to 10 times from the value of the still air. Although it is expected that the reduction in the airtightness of the second packing will occur considerably if it is limited to a part, it is not considered in the above-mentioned respective improvement plans of the double packing structure, and is an effective countermeasure for the reduction in the heat insulation performance due to the reduction. Is also not shown.

In each system of the present invention described below, the first to third systems are basically intended for refrigerators having a single packing structure, and the fourth to seventh systems are basically two refrigerators.
It is intended for refrigerators with a heavy packing structure,
The aim is to improve the packing and its surroundings to suit the purpose of the invention.

The refrigerator of the first type of the present invention comprises a box,
It has one or more doors corresponding to the storage compartment formed in the box, and packing provided on the four sides of the back surface of the door, and when the door is closed, at least the storage compartment of the box In a refrigerator having a structure in which cold air inside the box body is sealed by abutment of the front four circumferences and the surface of the packing, a tip of a fin located on the innermost side of the packing is a door inner plate of the door. It is characterized in that it is adhered to or adhered to.

Further, the refrigerator of the second type according to the present invention comprises a box, one or more doors corresponding to storage compartments formed in the box, and packings provided on four sides of the back of the door. A refrigerator having a structure in which when the door is closed, at least four rounds of the front surface of the storage compartment of the box and the surface of the packing come into contact with each other to seal cold air inside the box. The surface of the packing is divided into a portion closer to the outside of the refrigerator and a portion closer to the inside of the refrigerator for all or a part of the area facing the front four circumferences of the storage compartment of the box, and when the door is closed, The outer surface of the packing serves as a closing portion that seals the outer sides of the front four sides of the storage section of the box by magnetic force or deformation of the packing by elastic deformation of the packing itself, and the inner surface of the packing is the inner surface. Box storage area It is characterized in that the second blocking portion for sealing the front four sides of the compartment inner by the elastic deformation of the packing itself.

The refrigerator of the third type according to the present invention comprises a box, one or more doors corresponding to storage compartments formed in the box, and packings provided on four sides of the back surface of the door. A refrigerator having a structure in which when the door is closed, at least four rounds of the front surface of the storage compartment of the box and the surface of the packing come into contact with each other to seal cold air inside the box. In the case where the packing is extended along the door inner plate of the door from the front four circumferences to the inside of the warehouse from all or a part of the area facing the front four circumferences of the storage compartment of the box, and the door is closed, The outside surface of the packing of the packing serves as a closing portion that seals the outside of the storage on the front four sides of the storage section of the box by magnetic action or elastic deformation of the packing itself,
A part of the surface of the extended portion of the packing is located at the inner side of the four sides of the front side of the storage compartment of the box, at the inner side of the inner side of the box or at the four sides of the inner side of the inner box and the partition inner plate, and at the door. A second closing portion for sealing a gap with the door inner plate surface by elastic deformation of the packing itself, and an extended portion of the packing is fixed at a position inside the refrigerator from the second closing portion.

Further, the refrigerator of the fourth type of the present invention comprises a box, one or more doors corresponding to storage compartments formed in the box, and packings provided on four sides of the back of the door. Provided on the surface of the inner box of the box or the surface of the inner box and the partition inner plate corresponding to all or a part of the four circumferences of the storage section at a position inside the storage from the front of the storage section of the box. A second packing, wherein when the door is closed, four sides of the front surface of the storage compartment of the box and the surface of the packing come into contact with each other, and a position inside the warehouse from the four front surfaces of the storage compartment of the box. In the refrigerator, the surface of the door inner plate of the door and the surface of the second packing come into contact with each other due to elastic deformation of the packing itself, thereby sealing cold air inside the box body. The inner box surface of the box or inner box and partition inner plate The surface of the second packing is partially recessed, or the surface of the second packing is brought into contact with the surface of the door inner plate. The height is made larger than the gap between the surface of the inner box of the box around the installation position of the second packing or the surface of the inner box and the partition inner plate and the surface of the door inner plate of the door.

Further, in the refrigerator of the fourth type of the present invention, a box, one or more doors corresponding to storage compartments formed in the box, and four rounds on the back surface of the door are provided. A packing, and a second packing provided on the surface of the door inner plate of the door corresponding to all or a part of four circumferences of the storage compartment at a position inside the storage compartment from the front surface of the storage compartment of the box. When the door is closed, the front four circumferences of the storage compartment of the box and the surface of the packing come into contact with each other, and the inner box of the box at a position inside the warehouse from the four front circumferences of the storage compartment of the box. In a refrigerator having a structure in which a surface formed of a surface or an inner box and a partition inner plate and a surface of the second packing are in contact with each other by elastic deformation of the packing itself to seal cold air inside the box body, 2 Partially dent the surface of the door inner plate of the door. Or the height of the second packing is reduced by partially recessing the surface of the inner box or the surface formed of the inner box and the partitioning inner plate of the box body against which the surface of the second packing abuts. A gap between the surface of the inner box of the box around the installation position of the second packing or the surface of the inner box and the partition inner plate and the surface of the door inner plate of the door is also included.

Further, the refrigerator of the fifth type of the present invention comprises a box, one or more doors corresponding to storage compartments formed in the box, and packings provided on four sides of the back surface of the door. Provided on the surface of the inner box of the box or the surface of the inner box and the partition inner plate corresponding to all or a part of the four circumferences of the storage section at a position inside the storage from the front of the storage section of the box. A second packing, wherein when the door is closed, four sides of the front surface of the storage compartment of the box and the surface of the packing come into contact with each other, and a position inside the warehouse from the four front surfaces of the storage compartment of the box. In the refrigerator having a structure in which the surface of the inner plate of the door abuts against the surface of the second packing to seal the cool air inside the box, the sealing effect of the second packing is magnetic. It is obtained by deforming the packing by action It is.

Furthermore, in the refrigerator of the fifth type of the present invention, a box, one or more doors corresponding to storage compartments formed in the box, and four rounds of the back surface of the door are provided. A packing, and a second packing provided on the surface of the door inner plate of the door corresponding to all or a part of four circumferences of the storage compartment at a position inside the storage compartment from the front surface of the storage compartment of the box. When the door is closed, the front four circumferences of the storage compartment of the box and the surface of the packing come into contact with each other, and the inner box of the box at a position inside the warehouse from the four front circumferences of the storage compartment of the box. In a refrigerator having a structure in which a surface or an inner box and a surface formed of a partition inner plate and a surface of the second packing are in contact with each other to seal cold air inside the box, a sealing effect of the second packing is provided. Is obtained by the deformation of the packing by the action of magnetic force. Also include those characterized by.

A refrigerator according to a sixth embodiment of the present invention comprises a box, one or more doors corresponding to storage compartments formed in the box, and packings provided on four sides of the back surface of the door. Provided on the surface of the inner box of the box or on the surface of the inner box and the partition inner plate corresponding to all or a part of the four circumferences of the storage compartment at a position inside the storage compartment from the front or the front of the storage compartment of the box. When the door is closed, the front four circumferences of the storage compartment of the box and the surface of the packing are in contact with each other, and the inside of the storage compartment of the storage compartment of the box is inside the storage compartment. At a position, the surface of the door inner plate of the door and the surface of the second packing come into contact with each other to seal cold air inside the box body. 2 By having a mechanism to move or rotate the packing It is characterized in that to obtain the sealing effect of the serial second packing.

Further, in the refrigerator of the sixth type of the present invention, a box, one or more doors corresponding to storage compartments formed in the box, and four rounds of the back surface of the door are provided. A packing, and a second packing provided on the surface of the door inner plate of the door corresponding to all or a part of four circumferences of the storage compartment at a position inside the storage compartment from the front surface of the storage compartment of the box. When the door is closed, the four sides of the front of the storage compartment of the box come into contact with the surface of the packing, and the inner box of the box at a position inside the warehouse from the four fronts of the front of the storage compartment of the box. In a refrigerator having a structure in which a surface or an inner box and a surface formed of a partition inner plate and a surface of the second packing come into contact with each other to seal cold air inside the box, the second opening and closing operation is performed when the door is opened and closed. 2 Activating the mechanism to move or rotate the packing Also include those characterized by being so more to obtain a sealing effect of said second gasket.

Further, the refrigerator of the seventh system of the present invention is the refrigerator of the fourth to sixth systems,
The space between the surface of the inner box or the surface of the inner box and the partition inner plate and the surface of the door inner plate of the door partitioned by the packing and the second packing is referred to as a storage compartment of the box. Extending between the packing and the second packing so as to be further divided so as to divide the length of the circumference of the four circumferences, so as to be substantially orthogonal to the opposing side surfaces of the packing and the second packing; A plurality of compartment packings are provided on any one of the surface of the inner box of the box or the surface of the inner box and the partition inner plate and the surface of the door inner plate of the door and abutting on the other surface. It is characterized by:

As described above, the refrigerators of the first to third systems of the present invention are a new improvement system of the packing for the one having the single packing structure and the peripheral portion thereof as described above. Referring to the description of the heat penetration in the single packing structure made in the above technique, it can be understood that the operation of each configuration is as follows. First of the present invention
In the method (1), leakage of cold air in the refrigerator into the space A inside the fin and the fixing portion of the packing is prevented by bonding or fixing the tip of the fin inside the refrigerator. Thus, (1) the amount of heat infiltration in the width direction of the packing is reduced as compared with the related art while maintaining the original heat conduction path length on the packing base side, and the heat insulating performance of the packing is improved as compared with the related art. Also,
In the second method of the present invention, the division of the packing surface enhances the deformation followability of the second closing portion, which is closer to the inside of the refrigerator, particularly to the facing surface, so that the above-described space B is not formed, and the cold air flows into the refrigerator. No more. As a result, the original heat conduction path length on the packing surface side is maintained. (1) The amount of heat penetration in the width direction of the packing is reduced as compared with the conventional case, and the inner surface of the outer case made of steel plate is covered. In addition, since the heat conduction path becomes longer, the amount of heat penetration along the surface of the box is reduced as compared with the conventional case, and the heat insulating performance of the packing is improved as compared with the conventional case. In the third method of the present invention, a second closing portion is additionally provided at a portion of the packing extending to the inside of the refrigerator to restrict the inflow of cool air in the refrigerator. Thus, as in the case of the conventional double packing structure described above, the amount of heat penetration in the (1) packing width direction and (2) the direction along the surface of the box body in the single packing structure is reduced, and Since the heat insulating effect of the added air layer can also be used, the heat insulating performance of the packing and its peripheral portion is improved as compared with the conventional single packing structure. Further, in this method, the extension portion is fixed further inside the second closed portion, so that the second closed portion can be elastically deformed due to the fixed portion as seen in the conventional double packing structure described above. There is no danger that the parts become thin and cause durability problems. Although common to the first to third methods of the present invention, if the packing to be improved has no problem in terms of durability and design, and if each method can be appropriately adopted, in these methods, There is no new problem of durability and design.

Further, the refrigerators of the fourth to sixth systems according to the present invention are a new improvement system for packing having a double packing structure and peripheral parts thereof. Fourth Embodiment of the Present Invention
In the method of (2), the height of the second packing due to elastic deformation can be increased as compared with the conventional one by partially depressing the vicinity of the fixing portion of the second packing and the opposing surface. As a result, the durability, which has been a problem with the second packing of the conventional system, has been enhanced while suppressing the influence of a decrease in the storage capacity of the refrigerator within an acceptable range. In the fifth method of the present invention, the second packing is deformed by a magnetic force. Thus, the closing portion of the second packing is deformed only at the end of the door closing operation or at the beginning of the door opening operation due to the attraction force of the magnet and the ferromagnetic material, and the like, so that the second deformation due to the elastic deformation.
The height can be made smaller than in the case of the packing, and the problem of durability of the second packing as in the conventional method is eliminated. And
The sixth system of the present invention is a movable system having a mechanism for moving or rotating the second packing. As a result, the closing portion of the second packing moves only at the end of the door closing operation or at the beginning of the door opening operation to perform sealing or unsealing, so that the durability of the second packing as in the conventional method is achieved. Problem is gone. In addition, although common to the fourth to sixth systems of the present invention, the heat insulation performance of the packing and its surroundings is 2%.
Since there is no fundamental change in the heavy packing structure, it is as high as the conventional one, and if the object to be improved and the adoption of each system are appropriate, there will be no new design problem in these systems.

Further, the refrigerator of the seventh type of the present invention has a problem of heat insulation performance in the conventional double packing structure. Is applied to the refrigerators of the fourth to sixth systems of the present invention. In this method, the air layer between the packing and the second packing is divided into a plurality of portions by dividing the length of the circumference with the division packing.
Thereby, even if cold air flows into the compartment in a part of the air layer between the packing and the second packing, the other compartments are not affected, and the double packing structure as in the conventional one is obtained. The high heat insulation performance of the steel is not significantly impaired. Further, in this method, if an object to be improved or a partition packing to be added is appropriately selected from the viewpoint of durability and design, new problems of durability and design are not generated in this method.

The packing in the refrigerator of the first or second type of the present invention described above and the second packing in any of the refrigerators of the fourth to seventh types of the present invention can be applied in combination. In this case, it is apparent that the heat insulating performance of the packing and the peripheral portion thereof is improved, and that there is no problem in durability and design.

Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a first embodiment of a refrigerator of the first type according to the present invention, that is, a refrigerator having a structure in which a fin tip inside a refrigerator is adhered or fixed to a door inner plate surface with respect to a conventional single packing structure. FIG. 4 is a partial cross-sectional view showing the configuration and around a packing with a door closed. FIG. 2 is a similar partial sectional view of a second embodiment of the first type refrigerator according to the present invention.

The refrigerators of the first and second embodiments shown in FIGS. 1 and 2 are common to the following embodiments of the present invention. It is shown as packing between The structure of the packing and its peripheral portion is basically the same as that already described in connection with the prior art, and is as follows. The outer peripheral wall of the box 2 has a structure in which an outer case 5 made of a steel plate and an inner case 6 made of a resin are integrated with each other mainly with a heat insulating member 7 made of a hard urethane foam interposed therebetween. Is provided with a dew-prevention heater 8 inside. The door 3 has a structure in which a door outer plate 9 mainly made of a steel plate and a door inner plate 10 made of a resin are integrated with each other mainly with a heat insulating member 7 made of hard urethane foam interposed therebetween, and faces the front surface of the box body 2. A packing 4 mainly made of soft vinyl chloride is fixed to the packing fixing groove 11 on the four sides of the back surface so as to fit the fixing part 4d at the root thereof. Packing 4
The closing portion 4a performs a sealing action when the door 3 is closed.
The surface is located closer to the outside of the compartment by utilizing the magnetic force acting on the magnet 4b provided immediately inside and the outer box 5 of the box body 2 and the elastic deformation in the height direction of the packing by the air chamber 4c formed inside. The closing portion 4a is configured to be in close contact with the front surface of the opposing box body 2. The fins 4e formed on the inner side surface of the packing 4 come into contact with the surface of the door inner plate 10, and the air space defined by the fins 4e and the air chamber 4c inside the packing improve the heat insulation performance of the packing 4 in the width direction. It works to enhance.

However, in the case of the conventional single packing structure, the fin 4e only comes into contact with the surface of the door inner plate 10 mainly due to the elasticity of the fin. In this case, the cold air 12 in the refrigerator tends to leak from a place where contact is insufficient, and the amount of heat infiltration in the width direction of the packing (1) tends to be larger than originally due to a decrease in the path length on the packing root side. .

In the first embodiment of FIG. 1, the tip of the fin 4e is adhered to the surface of the door inner plate 10 with a packing fixing tape 19, while in the second embodiment of FIG.
e, the fixing projection 4f is slightly extended from the tip of the
Is fixed in the fixing hole 13 on the surface of the device. By bonding or fixing the tip of the fin 4e inside the packing of the packing 4 as described above, leakage of the cold air 12 inside the fin or into the packing fixing portion can be reliably prevented over the entire four circumferences where the packing is installed. Therefore, (1) the amount of heat penetration of the packing in the width direction is reduced, and the heat insulation performance of the packing 4 is improved as compared with the conventional one. In addition, if the packing to be improved has no problem in terms of durability and design, and if this method is properly adopted, there is no new problem in durability and design in this method.

As described above, according to the first method of the present invention, in the configuration of the single packing structure, the packing or the packing and the peripheral portion thereof which are capable of simultaneously achieving a high level of heat insulating performance, durability and designability are provided. Refrigerator can be realized.

Next, a second type refrigerator according to the present invention,
That is, a description will be given of a refrigerator having a structure in which the packing surface is divided toward the outside of the refrigerator and toward the inside of the refrigerator with respect to the conventional single packing structure. FIG. 3 is a partial cross-sectional view around the packing in a state where the door of the refrigerator in the first embodiment is closed, and FIGS. 4 and 5 are similar partial cross-sectional views of the refrigerator in the second and third embodiments. It is.

In the refrigerators of the first to third embodiments shown in FIGS. 3 to 5, the types of packings to be used and the structures of the packing and its peripheral parts other than the parts peculiar to this method are as follows.
This is the same as the case of the first method according to the present invention described above, and the description is omitted here. In this type of refrigerator, packing 4
Is divided into a closed portion 4a closer to the outside of the refrigerator and a second closed portion 4g closer to the inside of the refrigerator. In the first embodiment of FIG. 3, the second closed portion 4g has an air chamber 4c inside. In the second embodiment shown in FIG. 4, the second closing portion 4g has a buffer heat insulating member 14 (made of a soft foamed resin) together with the air chamber 4c inside,
In the third embodiment shown in FIG. 5, the second closing portion 4g has an air chamber 4c inside, and has a structure in which fine fin rows arranged in a direction to seal the cold air 12 in the refrigerator are formed on the surface. I have.

Due to the division of the surface of the packing 4, there is no fundamental change in the structure or the deformation mechanism at the closing portion 4a near the outside of the refrigerator, so that the sealing action does not change. On the other hand, referring to the description regarding heat penetration in the related art, the second closing portion 4g, which is the inner surface of the packing 4, is closer to the outer portion of the packing 4a.
The space B around the stepped portion due to the folding of the outer box 5 disappears, and the cold air 12 in the refrigerator does not flow there. As a result, the original heat conduction path length on the packing surface side is maintained. Since the heat conduction path becomes longer when covered, the heat penetration amount in the direction along the surface of the box (2) is reduced as compared with the conventional case, and the heat insulating performance of the packing 4 is improved as compared with the conventional case.

As the structure of the second closing portion 4g, the air chamber 4c and the cushioning heat insulating member 14 are provided inside, and the minute fin rows are formed on the surface. It is effective for In addition, if the packing to be improved has no problem in terms of durability and design, and if this method is properly adopted, there is no new problem in durability and design in this method.

As described above, according to the second system of the present invention, in the configuration of the single packing structure, the packing or the packing and its peripheral portion which can simultaneously achieve a high level of heat insulation performance, durability and designability are provided. Refrigerator can be realized.

Next, a third type refrigerator according to the present invention,
That is, a description will be given of a refrigerator having a configuration in which a second closing portion is added to a portion of the packing extending to the inside of the refrigerator in the conventional packing structure. FIG. 6 is a partial cross-sectional view around the packing in a state where the door of the refrigerator in the first embodiment is closed, and FIGS. 7 and 8 are similar partial cross-sectional views of the refrigerator in the second and third embodiments. It is.

In the refrigerators of the first to third embodiments shown in FIGS. 6 to 8, the types of packings to be used and the structures of the packing and its peripheral parts other than the parts peculiar to this method are the same as those of the present invention. The description is omitted here. In the refrigerator of this type, the packing 4 is extended to the inside of the refrigerator, and the extension 4h in the refrigerator is provided.
The space between the opposing surface of the inner box 6 is sealed by the second closing portion 4g which performs sealing by elastic deformation provided on a part of the surface of the inner box 6 so as to restrict the inflow of the cold air 12 in the refrigerator. I have. In the first embodiment of FIG. 6, the second closing portion 4g has a structure having an air chamber 4c inside, and in the second embodiment of FIG.
Instead of the closed portion 4g having no air chamber 4c inside, a structure in which minute fin rows arranged in a direction to seal the cold air 12 in the refrigerator are formed on the surface, and in the third embodiment of FIG. The 2 closed portion 4g has a structure having a buffer heat insulating member 14 instead of the air chamber 4c inside. Referring to the description related to heat intrusion in the conventional technology, (1) packing in a single packing structure as in the second method by adding the sealing action of the second closing portion 4g provided in the internal extension 4h. And (2) the amount of heat penetration in the direction along the surface of the box body is reduced, and the heat insulating effect of the air layer added as in the double packing structure can be used. The heat insulating performance of the packing and its surroundings is improved. Further, in this method, the fixing of the inside extension 4h is performed in the second
The fixing protrusion 4f is further attached to the door inner plate 10 on the inner side of the closed part 4g.
It is done by fitting it into the fixing hole 13 on the surface of
The elastically deformable portion of the second closing portion 4g does not become thin due to the thickness of the fixing portion as in the conventional double packing structure, and does not cause a problem of durability.

As the structure of the second closing portion 4g, the air chamber 4c and the cushioning heat insulating member 14 are provided in the inside or the fine fin rows are formed on the surface. It is effective for In addition, if the packing to be improved has no problem in terms of the design property and this method is properly adopted, no new design problem occurs in this method.

As described above, according to the third method of the present invention, in the structure of the single packing structure, the packing or the packing and its peripheral portion capable of simultaneously achieving a high level of heat insulation performance, durability and design can be provided. Refrigerator can be realized.

Next, a fourth type refrigerator according to the present invention,
That is, a refrigerator having a configuration in which the height of the second packing that abuts on the conventional double packing structure by elastic deformation is increased. FIG. 9 is a partial cross-sectional view around the packing of the refrigerator according to the first embodiment with the door closed, and FIGS. 10 to 12 are similar partial cross-sectional views of the refrigerator according to the second to fourth embodiments. It is.

In the refrigerators according to the first to fourth embodiments shown in FIGS. 9 to 12, the type of packing to be used and the structure of the packing other than the part peculiar to this method and the structure of the surrounding parts are the same as those of the present invention. 1 in the first method or 2
This is the same as the case of the heavy packing structure, and the description is omitted here. In this type of refrigerator, the second packing 15 is fixed both in the case where the second packing 15 is installed on the surface of the protruding portion of the door inner plate 10 into the refrigerator and on the inner surface of the inner box 6 on the four front sides. The second packing 1 that performs sealing action by elastic deformation by partially depressing the vicinity of the portion 15c, the fixing protrusion 15d, and the vicinity of the opposing surface where the closing portion 15a contacts.
The height of No. 5 can be increased as compared with the conventional double packing structure. In the first embodiment shown in FIG.
Reference numeral 5 denotes a structure provided on the surface of the door inner plate 10 and having an air chamber 15b therein. In the second embodiment shown in FIG.
Reference numeral 5 denotes a structure which is provided on the surface of the inner box 6 and has a row of minute fins arranged in a direction to seal the cold air 12 in the refrigerator instead of having the air chamber 15b therein, FIG. In the third embodiment, the second packing 15 is provided on the surface of the door inner plate 10 and has a buffer and heat insulating member 14 therein. In the fourth embodiment of FIG. , And has a structure in which a buffer heat insulating member 14 is provided inside and a fine fin row is formed in the closing portion 15a.

Referring to the description of the improvement of the double packing structure in the prior art, the surface of the protruding portion of the door inner plate 10 to which the second packing 15 acts to seal the inside of the door and the surface of the inner box 6 are described. The gap between the second packing 15 and the second packing 15 can be made larger than that, because the vicinity of the fixed portion and the vicinity of the opposing surface are partially depressed.
Since the rate of change in the height of the packing 15, that is, the distortion in the height direction, is reduced, there is no problem in terms of durability or compatibility between heat insulation performance and durability unlike the conventional double packing structure. Further, since only the vicinity of the fixing portion and the vicinity of the facing surface are only partially depressed, the influence of a decrease in the storage capacity of the refrigerator can be suppressed to an acceptable range. Second in each embodiment
As the structure of the packing 15, the air chamber 15 b and the cushioning heat insulating member 14 are provided inside, and the minute fin rows are formed on the surface. However, any of them is effective in giving the second packing 15 sufficient flexibility. is there. In addition, in this method, the heat insulation performance of the packing and its surroundings is basically the same as the double packing structure, so that it is as high as the conventional one.
If the object to be improved and the adoption of this method are appropriate, no new design problem arises in this method.

As described above, according to the fourth method of the present invention, in the structure of the double packing structure, the packing or the packing and its peripheral portion capable of simultaneously achieving a high level of heat insulation performance, durability and design can be achieved. A refrigerator equipped with the apparatus can be realized.

Next, a fifth type refrigerator according to the present invention,
That is, a refrigerator having a configuration in which the second packing is deformed by a magnetic force with respect to the conventional double packing structure will be described. FIG. 13 is a partial cross-sectional view of the packing around the refrigerator in the first embodiment with the door closed, and FIG. 14 is a similar partial cross-sectional view of the refrigerator in the second embodiment.

The first and second shown in FIG. 13 and FIG.
Also in the refrigerator according to the embodiment, the type of packing and the structure of the packing other than the part peculiar to this method and the structure of the surrounding parts are the double packing according to the first method according to the present invention and the conventional method. This is the same as the case of the structure improvement plan, and the description is omitted here. In this type of refrigerator, the second packing 15 is deformed by magnetic action. In the first embodiment of FIG. 13, the second packing 15 is installed on the surface of the protruding portion of the door inner plate 10 toward the inside of the compartment, and the magnet 15 f is fin-shaped except for the fixed portion 15 c inside the closed portion 15 a at the tip. In the second embodiment of FIG. 14, the second packing 15 is installed on the surface of the protruding portion of the door inner plate 10 to the inside of the refrigerator so that the closing portion 15 a is parallel to the closing portion 4 a of the packing 4. It has a structure having a magnet 15f and an air chamber 15b inside the closing portion 15a,
A magnetizing member 16 (made of a ferromagnetic material such as a steel plate) is provided on the surface of the inner box 6 at a portion facing the second packing 15.

Referring to the description of the improvement of the double packing structure in the prior art, the surface of the protruding portion of the door inner plate 10 into which the second packing 15 acts to seal and the surface of the inner box 6 are described. The gap between the magnet 15f and the magnetizing member 16 is
The sealing action can be performed with a small amount of deformation limited only at the end of the closing operation of the door 3 or at the beginning of the opening operation of the door 3 by the suction force of
There is no problem of compatibility between durability and heat insulating performance and durability as in the second packing due to elastic deformation that requires a certain degree of deformation for the sealing action. In addition, in this method, the heat insulation performance of the packing and its surroundings is basically the same as the double packing structure, so that it is as high as the conventional one.
If the object to be improved and the adoption of this method are appropriate, no new design problem arises in this method.

As described above, according to the fifth system of the present invention, in the structure of the double packing structure, the packing or the packing and its peripheral portion capable of simultaneously achieving a high level of heat insulating performance, durability and design can be achieved. A refrigerator equipped with the present invention can be realized.

Next, a sixth type refrigerator according to the present invention,
That is, a refrigerator of a movable type having a mechanism for moving or rotating the second packing with respect to the conventional double packing structure will be described. FIG. 15 and FIG.
FIGS. 17 and 18 are partial cross-sectional views of the packing around the refrigerator in the first embodiment with the door closed and the door open, and FIGS. 17 and 18 are similar partial cross-sectional views of the refrigerator in the second embodiment. FIG. 19 and FIG.
It is a similar partial sectional view of the refrigerator in the embodiment of the present invention,
FIGS. 21 and 22 are similar partial cross-sectional views of the refrigerator in the fourth embodiment, and FIG. 23 is a partial cross-sectional view around the packing with the door of the refrigerator closed in the fifth embodiment. .

The first to third shown in FIG. 15 to FIG.
Also in the refrigerator according to the embodiment, the type of packing and the structure of the packing other than the part peculiar to this method and the structure of the surrounding parts are the double packing according to the first method according to the present invention and the conventional method. This is the same as the case of the structure improvement plan, and the description is omitted here. This type of refrigerator is a movable type having a mechanism for moving or rotating the second packing.

In the first embodiment shown in FIGS. 15 and 16, the second movable packing 17 is installed on the surface of the protruding portion of the door inner plate 10 toward the inside of the storage, and the second movable packing 17 including the closing portion 17a is provided.
The movable packing 17 is rotatably fixed at a rotation fulcrum 17b. When the door 3 is closed, the movable packing 17 receives a counterclockwise force from the opposite drive unit 17c due to contact with the front surface of the inner box 6,
The sealing action is performed by contacting the surface of the inner box 6 which is the facing surface.
Conversely, when the door 3 is in the open state, the spring 17 is used instead of the drive unit 17c.
Due to the clockwise (arrow C) force from d, the door 3 is stored in the vicinity of the surface of the protruding portion of the door inner plate 10 of the door 3, so that the operation of the door 3 does not interfere.

In the second embodiment shown in FIGS. 17 and 18, the second movable packing 17 is installed at the corner between the front surface of the inner box 6 and the inner surface of the inner box, and rotates with the opening and closing of the door 3. Although the directions are opposite, the sealing action by rotation is substantially the same as in the first embodiment.

In the third embodiment shown in FIGS. 19 and 20, the second movable packing 17 is installed at the corner between the front surface of the inner box 6 and the inner surface of the inner box. The movable packing 17 can move within the guide 17e. In the closed state of the door 3, a spring 17d (which always pulls the second movable packing 17 back into the guide 17e) connected to the second movable packing 17 applies a force from the driving unit 17c (the surface of the door inner plate 10 of the door 3). The closed portion 17a contacts the surface of the door inner plate 10 which is the opposing surface of the door 3 and protrudes from the inner side of the door 3 to perform a sealing action. Conversely, when the door 3 is open, the drive unit 1
When the force of 7c disappears (moves in the direction of arrow D but moves away from the surface of the door inner plate 10), the closing portion 17a is stored near the surface of the inner box 6 by receiving the pulling force (in the direction of arrow C) from the spring 17d. Therefore, the operation of the door 3 is not hindered.

In the fourth embodiment shown in FIGS. 21 and 22, similarly to the third embodiment, the second movable packing 17 is provided.
Is installed at the corner between the front surface of the inner box 6 and the inner surface of the inner box 6 and performs a sealing action by moving the closing portion 17a as the door 3 opens and closes. Is slightly different in that the direction of the guide 17e is inclined.
In the fifth embodiment shown in FIG. 23, the second movable packing 17 is installed on the inner surface of the inner box 6 from the front surface thereof,
The second movable packing 17 including the closing portion 17a is
7b, which is rotatably fixed and has a closed portion 1 at the tip.
7a, a magnet 17f, a spring 17d near the rotation fulcrum 17b (always pulling the second movable packing 17 back into the inner box 6), and a surface of the door inner plate 10 at the protruding portion of the door 3, which is the opposing surface. Has a magnetized member 16.
In the closed state of the door 3, the attraction force of the magnet 17f and the magnetized member 16 exceeds the spring 17d, and the closing portion 17a abuts on the surface of the door inner plate 10 to perform a sealing action. The second movable packing 17 is only the force of
Since it is pulled back inside, there is no hindrance to the operation of the door 3.

Referring to the description of the improvement of the double packing structure in the prior art, the surface of the protruding portion of the door inner plate 10 in which the second movable packing 17 acts to seal the inner side of the inner box 6 and the inner box 6 are sealed. Although the gap with the surface is as small as about 5 mm, the closing portion 17a of the second movable packing 17 has a rotating or moving mechanism and moves only at the end of the closing operation of the door 3 or at the beginning of the opening operation of the door 3 to securely seal. Since the stopping action is performed, there is no problem such as durability or heat insulating performance and durability being compatible with the second packing due to elastic deformation that requires a certain degree of deformation for the sealing action. In addition, in this method, the heat insulation performance of the packing and the surrounding area is basically the same as the conventional one because there is no fundamental change in the double packing structure, and if the object to be improved and the adoption of this method are appropriate, this method is used. Does not cause any new design problem.

As described above, according to the sixth method of the present invention, in the structure of the double packing structure, the packing or the packing and its peripheral portion capable of simultaneously achieving a high level of heat insulating performance, durability and design can be achieved. A refrigerator equipped with the present invention can be realized.

Further, in the refrigerator of the seventh type of the present invention, that is, in the refrigerators of the fourth to sixth types of the present invention,
A refrigerator having a configuration in which a compartment packing is provided between a packing and a second packing will be described. FIG. 24 is a front view of the upper half of the refrigerator in the embodiment.

In the refrigerator of the embodiment shown in FIG. 24 as well, the type of packing and the structure of the packing other than the part peculiar to this method and the structure of the surrounding parts are the same as those of the first method according to the present invention and the conventional method. This is the same as the case of the improvement plan of the double packing structure in the technique described above, and the description is omitted here. In this system, between the packing 4 and the second packing 15 provided on the four sides of the back surface of the door 3 of the refrigerator 1 of the fourth system according to the present invention,
In this case, a partition packing 18 is provided which divides the circumference of the four storage compartments (in the direction of arrow E) in which both are installed and which extends substantially orthogonally to the side surfaces of both storage compartments. . The partition packing 18 allows the packing and the second
Because the air layer between the packing is divided into multiple parts,
Even if the airtightness decreases in a part of the second packing 15 and cold air in the refrigerator flows into a part of the air space between the packing 4 and the second packing 15, the influence is exerted on the other parts. In addition, the deterioration of the heat insulating performance as a double packing structure can be reduced as compared with the conventional one. Further, in this method, if an object to be improved or a partition packing to be added is appropriately selected from the viewpoint of durability and design, new problems of durability and design are not generated in this method.

As described above, according to the seventh system of the present invention, in the structure of the double packing structure, the packing or the packing and its peripheral portion capable of simultaneously achieving a high level of heat insulation performance, durability and design can be achieved. A refrigerator equipped with the present invention can be realized.

In the above description of the structure of the packing of the refrigerators of each type according to the present invention and the structure of the peripheral parts, the object is the packing between the upper, lower, left, and right outer peripheral walls of the box and the door, and the current household refrigerator. Limited to the case corresponding to the typical structure and material of However, as already mentioned in the prior art, even in the case of packing between the door and the partition wall between the storage compartments arranged vertically above and below the box, some of the structures are of a new or commercial type. -Even in the case of refrigerators made of different materials, as long as the function as the packing of sealing using flexibility or the like is the same, it can be similarly considered as an object related to the present invention.

[0086]

According to the refrigerator of the present invention, the problems of the heat insulation performance of the conventional independent packing structure and the problems of the heat insulation performance, durability and design of the conventional double packing structure can be effectively solved. Since it can be improved, it is possible to obtain a packing or a refrigerator provided with packing and its peripheral part, which can simultaneously achieve a high level of heat insulating performance, durability and design.

[Brief description of the drawings]

FIG. 1 shows a first embodiment of a first type refrigerator according to the present invention.
FIG. 4 is a partial cross-sectional view around the packing with the door closed in the embodiment of FIG.

FIG. 2 shows a second embodiment of the first type refrigerator according to the present invention.
FIG. 4 is a partial cross-sectional view around the packing with the door closed in the embodiment of FIG.

FIG. 3 shows a first type of the second type refrigerator according to the present invention.
FIG. 4 is a partial cross-sectional view around the packing with the door closed in the embodiment of FIG.

FIG. 4 shows a second type refrigerator according to the second embodiment of the present invention.
FIG. 4 is a partial cross-sectional view around the packing with the door closed in the embodiment of FIG.

FIG. 5 shows a third refrigerator in the second type refrigerator according to the present invention.
FIG. 4 is a partial cross-sectional view around the packing with the door closed in the embodiment of FIG.

FIG. 6 shows a first embodiment of the third type refrigerator according to the present invention.
FIG. 4 is a partial cross-sectional view around the packing with the door closed in the embodiment of FIG.

FIG. 7 shows a second embodiment of the third type refrigerator according to the present invention.
FIG. 4 is a partial cross-sectional view around the packing with the door closed in the embodiment of FIG.

FIG. 8 shows a third type refrigerator according to the present invention.
FIG. 4 is a partial cross-sectional view around the packing with the door closed in the embodiment of FIG.

FIG. 9 shows the first type of the fourth type refrigerator according to the present invention.
FIG. 4 is a partial cross-sectional view around the packing with the door closed in the embodiment of FIG.

FIG. 10 is a partial cross-sectional view of the vicinity of the packing with a door closed in a second embodiment of the fourth type refrigerator according to the present invention.

FIG. 11 is a partial cross-sectional view of the vicinity of a packing with a door closed in a third embodiment of the fourth type refrigerator according to the present invention.

FIG. 12 is a partial cross-sectional view of the vicinity of a packing with a door closed in a fourth embodiment of the fourth type refrigerator according to the present invention.

FIG. 13 is a partial cross-sectional view of the vicinity of the packing with the door closed in the first embodiment of the fifth type refrigerator according to the present invention.

FIG. 14 is a partial cross-sectional view of the vicinity of the packing with the door closed in the second embodiment of the fifth type refrigerator according to the present invention.

FIG. 15 is a partial cross-sectional view of the vicinity of packing with the door closed in the first embodiment of the refrigerator of the sixth system according to the present invention.

16 is a partial cross-sectional view of the refrigerator shown in FIG. 15 around a packing with a door opened.

FIG. 17 is a partial cross-sectional view of the vicinity of packing with a door closed in a second embodiment of the refrigerator of the sixth system according to the present invention.

18 is a partial cross-sectional view of the refrigerator shown in FIG. 17 around a packing with a door opened.

FIG. 19 is a partial cross-sectional view of the vicinity of packing with a door closed in a third embodiment of the refrigerator of the sixth system according to the present invention.

20 is a partial cross-sectional view of the refrigerator shown in FIG. 19 around a packing with a door opened.

FIG. 21 is a partial cross-sectional view of the vicinity of a packing with a door closed in a fourth embodiment of the refrigerator of the sixth system according to the present invention.

FIG. 22 is a partial cross-sectional view of the packing of the refrigerator of FIG. 21 with a door opened.

FIG. 23 is a partial cross-sectional view of the vicinity of packing with a door closed in a fifth embodiment of the refrigerator of the sixth system according to the present invention.

FIG. 24 is a front view of the upper half of the refrigerator in one embodiment of the refrigerator of the seventh type according to the present invention.

FIG. 25 is a perspective view of the entire conventional refrigerator.

FIG. 26 is a partial cross-sectional view of the packing around the packing in a state where the door is closed, of the refrigerator having the packing in the related art.

FIG. 27 is a partial cross-sectional view of the vicinity of the packing of the refrigerator provided with the conventional packing and the second packing with the door closed.

[Explanation of symbols]

2 ... box body, 3 ... door, 4 ... packing, 5 ... outer box, 6 ... inner box, 7 ... heat insulating member, 9 ... door outer plate, 14 ... cushioning heat insulating member, 1
5: second packing, 17: second movable packing, 18: partition packing.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor, Teruichi Ishioka 800, Tomita, Ohira-cho, Shimotsuga-gun, Tochigi Pref.

Claims (9)

[Claims] 1. A container comprising: a box, one or more doors corresponding to storage compartments formed in the box, and packings provided on four sides of a back surface of the door, wherein the door is closed. Is a refrigerator having a structure in which at least four rounds of the front surface of the storage compartment of the box and the surface of the packing are in contact with each other to seal cold air inside the box, and Characterized in that the end of the refrigerator is adhered or fixed to the door inner plate of the door. 2. A container having a box, one or more doors corresponding to storage compartments formed in the box, and packings provided on four sides of the back of the door, wherein the door is closed. A refrigerator having a structure in which at least four front faces of the storage compartment of the box and the surface of the packing are in contact with each other to seal cold air inside the box, The surface of the packing is divided into a part near the outside of the refrigerator and a part near the inside of the warehouse for all or a part of the facing area, and when the door is closed, the outside surface of the packing is closer to the outside of the box. The outer periphery of the storage compartment on the four front sides of the storage compartment becomes a closing portion for sealing by deformation of the packing by the action of magnetic force or the elastic deformation of the packing itself, and the inner surface of the packing is inside the compartment on the four front sides of the storage compartment of the box. The packing of the Refrigerator, characterized in that the second closing part is sealed with gender deformation. 3. A container comprising: a box; one or more doors corresponding to storage compartments formed in the box; and packings provided on four sides of a back surface of the door, wherein the door is closed. A refrigerator having a structure in which at least four front faces of the storage compartment of the box and the surface of the packing are in contact with each other to seal cold air inside the box, When the packing is extended along the door inner plate of the door from the front four circumferences to the inside of the warehouse for all or a part of the facing area, and when the door is closed, the outside surface of the packing is the box body. The outer periphery of the storage compartment on the front four sides of the storage compartment is closed by magnetic force or the elastic deformation of the packing itself, and a part of the surface of the extended portion of the packing is inside the storage compartment from the four front edges of the storage compartment of the box. At the position of the inner box of the box A second closing portion that seals the gap between the four circumferences or the four circumferences of the inner box and the partition inner plate and the surface of the door inner plate of the door by elastic deformation of the packing itself, and an extended portion of the packing is a second closing portion. A refrigerator, which is fixed at a position inside the refrigerator. 4. A box, one or more doors corresponding to storage compartments formed in the box, packings provided on the four sides of the back of the door, and a storage compartment from the front of the storage compartment of the box. A second packing provided on an inner box surface of the box body or an inner box and a surface formed of a partition inner plate corresponding to all or a part of the four circumferences of the storage compartment at an inner position; When closed, the front four circumferences of the storage compartment of the box and the surface of the packing abut against each other, and the surface of the door inner plate of the door at a position inside the warehouse from the front four circumferences of the storage compartment of the box, and In a refrigerator having a structure in which cold air inside the box body is sealed by abutting the surface of the second packing due to elastic deformation of the packing itself, the second packing may be formed on the inner box surface or the inner box of the box body. Partially recess the surface consisting of the inner plate Or by a surface of said second gasket has a shape that is recessed the door inner plate surface of the door abutting partly the height of the second gasket and the second
A refrigerator characterized by being larger than a gap between the surface of the inner box of the box body around the installation position of the packing or the surface of the inner box and the partition inner plate and the surface of the door inner plate of the door. 5. A box, one or more doors corresponding to storage compartments formed in the box, packings provided on the four sides of the back of the door, and a storage compartment from the front of the storage compartment of the box. A second packing provided on the surface of the door inner plate of the door corresponding to all or a part of the four circumferences of the storage compartment at an inner position, wherein the box is closed when the door is closed. The front four circumferences of the storage compartment and the surface of the packing are in contact with each other, and the inner box surface of the box or the surface formed of the inner box and the partition inner plate at a position inside the warehouse from the four front circumferences of the storage compartment of the box, In a refrigerator having a structure in which cold air inside the box is sealed by contacting the surface of the second packing with elastic deformation of the packing itself, the second packing is formed by partially removing the surface of the door inner plate of the door. The second packing is installed in a partially depressed state. The height of the second packing is reduced by partially depressing the inner box surface of the box body or the surface formed of the inner box and the partition inner plate with which the second packing comes into contact. A refrigerator characterized by being larger than a gap between a surface of an inner box or a surface formed of an inner box and a partition inner plate and a surface of a door inner plate of the door. 6. A box, one or more doors corresponding to storage compartments formed in the box, packing provided on four sides of the back surface of the door, and a storage compartment from the front of the storage compartment of the box. A second packing provided on an inner box surface of the box body or an inner box and a surface formed of a partition inner plate corresponding to all or a part of the four circumferences of the storage compartment at an inner position; When closed, the front four circumferences of the storage compartment of the box and the surface of the packing abut against each other, and the surface of the door inner plate of the door at a position inside the warehouse from the front four circumferences of the storage compartment of the box, and In a refrigerator having a structure in which cold air inside the box body is sealed by contact with the surface of the second packing, the sealing effect of the second packing is obtained by deformation of the packing by magnetic force. A refrigerator characterized by the following. 7. A box, one or more doors corresponding to storage compartments formed in the box, packings provided on four sides of the back surface of the door, and a storage compartment from the front of the storage compartment of the box. A second packing provided on the surface of the door inner plate of the door corresponding to all or a part of the four circumferences of the storage compartment at an inner position, wherein the box is closed when the door is closed. The front four circumferences of the storage compartment and the surface of the packing are in contact with each other, and the inner box surface of the box or the surface formed of the inner box and the partition inner plate at a position inside the warehouse from the four front circumferences of the storage compartment of the box, In a refrigerator having a structure in which cold air inside the box body is sealed by contact with the surface of the second packing, the sealing effect of the second packing is obtained by deformation of the packing by magnetic force. A refrigerator characterized by the following. 8. A box, one or more doors corresponding to storage compartments formed in the box, packings provided on four sides of the back of the door, and a front or front face of the storage compartment of the box. A second packing provided on the surface of the inner box or the inner box and a partition inner plate of the box corresponding to all or a part of the four circumferences of the storage compartment at a position further inside the storage compartment; When the door is closed, the front four circumferences of the storage compartment of the box abut against the surface of the packing, and the surface of the door inner plate of the door at a position inside the warehouse from the front four circumferences of the storage compartment of the box. A refrigerator that has a structure in which cold air inside the box body is sealed by contact between the second packing and the surface of the second packing, the mechanism having a mechanism for moving or rotating the second packing when the door is opened and closed. So that the sealing effect of the second packing is obtained. Refrigerator, characterized in that it was. 9. A box, one or more doors corresponding to storage compartments formed in the box, packing provided on the four sides of the back of the door, and a storage compartment from the front of the storage compartment of the box. A second packing provided on the surface of the door inner plate of the door corresponding to all or a part of the four circumferences of the storage compartment at an inner position, wherein the box is closed when the door is closed. The front four circumferences of the storage compartment and the surface of the packing are in contact with each other, and the inner box surface of the box or the surface formed of the inner box and the partition inner plate at a position inside the warehouse from the four front circumferences of the storage compartment of the box, In a refrigerator having a structure in which cold air inside the box body is sealed by contact with a surface of the second packing, by operating a mechanism for moving or rotating the second packing when the door is opened and closed. To obtain the sealing effect of the second packing Refrigerator, characterized in that was.