JP2000314585A - Refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To save energy by reducing heat entering from an external part, in heat insulating constitution of a refrigerator. SOLUTION: A heat insulating door 46 is openably situated at the front opening part of a heat insulating box body 39, having a storage chamber 55 constituted at its internal part and the thickness of the heat insulating wall of a planar part 51 of the heat insulation door positioned opposite to a planar part 41 of the front edge of the heat insulating box body is decreased to a value lower than the reference heat insulation wall thickness of the heat insulating door 46 fronting on the interior of the refrigerating chamber 55. The front end part of the heat insulating box body 39 is cut through the reference wall thickness of the heat insulating door 46 and the distance of a throat 59 consisting of the front side of an inner box 44 and the outer side of a door inner plate 48 is lengthened, and penetration of outside air heat is decreased and energy is saved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerator box for reducing heat entering from the outside.

[0002]

2. Description of the Related Art In recent years, from the viewpoint of protection of the global environment, there has been an active movement to suppress the generation of carbon dioxide due to power generation and stop global warming. Conservation of energy by reducing power consumption is also urgently required for home appliances that are directly used by ordinary consumers on a daily basis, and the development of energy-saving technologies is one of the most demanding issues for refrigerators, which have a particularly high power consumption ratio among household appliances. Has become one.

[0003] The main themes of energy saving in refrigerators are to increase the efficiency of the refrigeration cycle and to enhance the heat insulation of the refrigerator itself. Of these, the refrigeration cycle has recently adopted inverter compressors and developed high-efficiency heat exchangers. The results are being dramatically improved.

[0004] On the other hand, the enhancement of the heat insulating property has been promoted mainly by improving the performance of the heat insulating material, and in recent years, some of them have been commercialized in combination with a vacuum heat insulating material.
It has a great effect on the penetration of external heat through the heat insulating wall. However, the intrusion of external heat into the refrigerator main body is most remarkable at the periphery of the main body opening where the heat insulation structure is cut off, and reduction of the invasion heat at this portion will be one focus in energy saving in the future.

Regarding the structure of the peripheral portion of the opening of the main body, examples of conventional refrigerators include Japanese Utility Model Laid-Open No. 4-110377 (referred to as Conventional Example 1), Japanese Patent Laid-Open No. 5-66084 (referred to as Conventional Example 2), and Japanese Patent Laid-Open Publication No. -180179 (Conventional Example 3)
And Japanese Patent Application Laid-Open No. H8-100985 (hereinafter referred to as Conventional Example 4).

Hereinafter, the conventional refrigerator will be described with reference to the drawings.

FIG. 9 is a cross-sectional view of the periphery of the opening of the main body of the first conventional example. In FIG. 9, reference numeral 1 denotes a heat insulating box of the refrigerator main body;
Is a heat insulating door, 3 is an outer box made of a steel plate of the heat insulating box 1,
The front end of the main body opening is folded inward to form a flange 4 on the front surface and a bag-like folded flange 5 on the back surface of the flange 4. Reference numeral 6 denotes a condensing pipe for preventing dew condensation on the periphery of the opening abutted on the bottom in the folded flange 5. Reference numeral 7 denotes an inside of the folded flange 5 having a front end face inserted into contact with the condensing pipe 6. It is a box. Numeral 8 denotes a seal member attached to the periphery of the opening of the heat insulating door 2. The seal member 8 has a flexible magnet 9 built into the inner surface thereof, which is mainly formed by extrusion molding of vinyl chloride.

[0008] Regarding the refrigerator configured as described above,
The operation will be described below.

When the heat-insulating door 2 is closed, the magnet 9 of the sealing member 8 is attracted to the flange 4 of the outer box 3 so that
The seal member 8 seals the space between the heat-insulating box 1 and the heat-insulating door 2 to prevent outside air from entering the storage.

FIG. 10 is a sectional view of the periphery of the opening of the main body of the conventional example 2. As shown in FIG. In FIG. 10, reference numeral 10 denotes a heat insulating box of the refrigerator main body, 11 denotes an outer box made of a steel plate of the heat insulating box 10, and a flange 12 is formed on a front surface, and a bag-shaped folded flange 13 is formed on a rear surface of the flange 12. ing. Reference numeral 14 denotes a condensation pipe for preventing dew condensation on the peripheral edge of the opening, which is accommodated in a space formed between the bottom of the folded flange 13 and the side surface of the outer box 11, and 15 has a front end face inserted into the folded flange 13. It is a box. 16 is an insulated door, 1
7 is a magnet 1 attached to the periphery of the opening of the heat insulating door.
8 seal members.

In the above-described configuration, the space between the heat-insulating box 10 and the heat-insulating door 16 is sealed by the magnet 18 of the sealing member 17 in the same manner as in the above-mentioned conventional example 1, so that outside air can be prevented from entering the inside of the refrigerator. To prevent.

FIG. 11 is a cross-sectional view of the periphery of the main body opening of the third conventional example. 11, reference numeral 19 denotes an insulating box of the refrigerator main body, 20 denotes an insulating door, 21 denotes an outer box made of a steel plate of the insulating box 19, and has a flange 22 on a front surface and a bag-shaped fold on a back surface of the flange 22. A flange 23 is formed. Reference numeral 24 denotes an inner box having a front end face inserted into the folded flange 23. Reference numeral 25 denotes a seal member attached to the periphery of the opening of the heat insulating door 20, and a flexible magnet 26 is provided on the inner surface. Reference numeral 27 denotes a resin door inner plate that extends into the refrigerator to form a door shelf. 28 is the door inner plate 2
The second seal member is attached to the side surface of the inner box 24 when the heat insulation door 20 is closed.

In the above configuration, when the heat insulating door 20 is closed, the magnet 26 of the seal member 25 is attracted to the flange 22 of the outer box 21 and the second seal member 28 is
4, the heat insulating box 19 and the heat insulating door 20 are brought into contact with each other.
The space between them is double sealed to enhance the effect of preventing outside air from entering the storage.

FIG. 12 is a cross-sectional view of the periphery of the opening of the main body of the fourth conventional example. In FIG. 12, reference numeral 29 denotes an insulating box of the refrigerator main body, reference numeral 30 denotes an insulating door, and reference numeral 31 denotes an outer box made of a steel plate of the insulating box 29. The front has a flange 32, and the back of the flange 32 has a bag-like folded shape. A flange 33 is formed. Reference numeral 34 denotes an inner box having a front end face inserted into the folded flange 33. Reference numeral 35 denotes a resin door inner plate that extends into the refrigerator to form a door shelf. Reference numeral 36 denotes a seal member attached to the periphery of the opening of the heat insulating door 30. The sealing member 36 does not have a magnet on the inner surface, and is configured to contact the front end surface of the inner box 34 when the heat insulating door is closed. 37 is the inner box 3
Reference numeral 4 denotes a magnet provided on the side surface near the front part, and 38 is a magnet provided on the side surface of the door inner plate 35, and is arranged so as to face each other and attract each other.

In the above-described configuration, when the heat insulating door 30 is closed, the sealing member 36 is pressed against the inner box 34 by the attraction of the magnets 37 and 38 so that the space between the heat insulating box 29 and the heat insulating door 30 is formed. Seals the space to prevent outside air from entering the storage. At this time, the sealing member 36 has a high thermal conductivity and is easy to induce external heat.
, And is in contact with the resin inner box 34 having a low thermal conductivity, so that the amount of heat entering the inside of the storage can be reduced.

[0016]

However, in the structure of the prior art 1, the magnet 9 of the seal member 8 is attracted to the flange 4 of the outer box 3 and the condensing pipe 6 is accommodated in the folded flange 5. In order to secure the dimension for inserting and fixing the tip of the inner box 7, it is necessary to extend the width of the flange 4 to the inside of the refrigerator and make it large, and the amount of intrusion of external heat through the steel plate having high thermal conductivity. There was a problem that there were many. In addition, there is also an inconvenience that the heat of the condensing pipe 6 in the folded flange 5 is conducted to the inside of the storage via the tip of the inner box 7.

In the configuration of the conventional example 2, the condensing pipe 14
Is not housed inside the return flange 13, heat intrusion into the inside of the refrigerator through the tip of the inner box 11 can be reduced. However, in order to adsorb the seal member 17 with the magnet 18, and It is necessary to extend the width of the flange 12 to the inside of the refrigerator to secure a dimension in which the front end of the inner box 11 is inserted and fixed in the return flange 13 after being arranged on the side surfaces of the return flange 13 and the outer box 11. Therefore, there is a problem that intrusion of external heat through a steel plate having high thermal conductivity is inevitable.

In the structure of the third conventional example, the heat penetration through the throat between the heat-insulating box 19 and the heat-insulating door 20 can be reduced by the double sealing structure by adding the second sealing material 25. The seal structure of the portion is the same as in Conventional Examples 1 and 2,
Since the width of the flange 22 of the outer box 21 is made large, there is a problem that heat invasion into the refrigerator due to heat conduction cannot be avoided.

Further, in the configuration of the conventional example 4, the magnet is not provided on the seal member 36 at the opening, and the pair of magnets 37 and 38 for performing the attracting action are provided at positions separated from the inside of the refrigerator and in different working directions. Although invasion heat due to heat conduction from the outer box flange 32 can be reduced, the pressure between the heat insulating box 29 and the heat insulating door 30 tends to widen due to insufficient pressure contact of the seal member 36. For this reason, there is a problem that intrusion of outside air heat through the seal member 36 tends to increase.

The present invention has been made to solve the conventional problems, and has as its object to reduce heat intrusion from outside the periphery of the opening of the main body to save energy.

In the prior art 3, since the inner box 24 extends without a large inclination in the depth direction of the inside of the box, especially on the handle side of the heat insulating door 20, the second seal member 28 is rotated by the door. Sealing is performed while contacting the side surface of the inner box 24 along the trajectory. If a secure seal is to be performed, damage to the second seal member 28, the weight of the door opening / closing operation, sliding noise, etc. The problems described above occurred, and there was a risk that the sealing would be insufficient if these problems were to be avoided.

A second object of the present invention is to reliably seal the throat between the inner box and the door inner plate without impairing the durability of the sealing member and the operability of opening and closing the door.

Further, in all the structures of the conventional examples 1 to 4, since the respective sealing members 8, 17, 22, 33 are located in front of the opening of the main body, the appearance from the side is poor. There were drawbacks.

A third object of the present invention is to provide a refrigerator having an improved external appearance and a good external appearance.

In all the structures of the conventional examples 1 to 4, the sealing members 8, 17, 22, and 33 need to be sealed on the front surface of the opening of the main body.
The wall thickness of the front part of 0, 19, 29 is correspondingly thick and the opening frontage is small. Therefore, the heat insulating doors 2, 16, 20,
When 30 was opened, there was an inconvenience that there was a feeling of oppression and the inside of the refrigerator could not be seen widely.

[0026] A fourth object of the present invention is that when the door is opened,
An object of the present invention is to provide a refrigerator in which the inside of the refrigerator can be seen widely without feeling a feeling of oppression.

[0027]

In order to achieve this object, a refrigerator according to the present invention is provided with a heat-insulating door which is openable and closable at a front opening of a heat-insulating box having a storage room therein. It consists of a flat part and a throat formed with the front side of the inner box of the heat-insulating box and the flat part formed on the periphery of the heat-insulating door and the outer surface of the door inner plate of the heat-insulating door facing each other. The thickness of the heat-insulating wall of the flat portion was made smaller than the standard heat-insulating wall thickness of the heat-insulating door facing the storage room.

As a result, heat entering from the periphery of the opening can be reduced, and energy can be saved.

[0029]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is directed to an insulation box formed by enclosing an outer box, an inner box, and a heat insulating material between the outer box and the inner box and having a front opening. A box, a storage room configured inside the heat-insulating box, a door outer plate, and a door inner plate,
A heat insulating door formed by enclosing a heat insulating material between the door outer plate and the door inner plate to open and close an opening of the heat insulating box; a flat portion of a front edge of the heat insulating box and a front side surface of the inner box; The thermal insulation comprises a flat portion formed on the periphery of the door and a throat formed with the outer surface of the door inner plate facing each other, and a heat insulating wall thickness of the flat portion formed on the peripheral edge of the heat insulating door facing the storage chamber. It is thinner than the standard insulation wall thickness of the door, and the front end of the heat insulation box penetrates into the reference wall thickness of the insulation door, so the throat distance can be extended without increasing the basic wall thickness, and the outside air heat Intrusion is reduced.

According to a second aspect of the present invention, in the first aspect of the present invention, the heat-insulating door is a rotary door that opens and closes an opening of the heat-insulating box by vertically supporting the side end with a hinge. In this case, the front end of the heat-insulating box is cut into the reference wall thickness of the heat-insulating door, so that the throat distance of the rotary door can be lengthened, and the invasion of outside air decreases.

According to a third aspect of the present invention, in the first aspect of the present invention, the heat-insulating door is a drawer-type door, and the front end of the heat-insulating box cuts into the reference wall thickness of the heat-insulating door. As a result, the throat distance of the pull-out door can be increased, and the intrusion of outside heat decreases.

[0032]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a refrigerator according to the present invention will be described below with reference to the drawings.

(Embodiment 1) FIG. 1 is a sectional view of the periphery of an opening of a main body of a refrigerator according to Embodiment 1 of the present invention. FIG. 2 is an external perspective view of the refrigerator according to the embodiment.

In FIGS. 1 and 2, reference numeral 39 denotes a heat insulating box of the refrigerator body. Reference numeral 40 denotes an outer box made of a steel plate of the heat insulating box body 39. By bending a front end face inward,
A flange 42 is provided on the front flat portion 41,
Is formed with a bag-shaped folded flange 43 on the back surface of.
Reference numeral 44 denotes a resin inner box made of a non-magnetic material formed by vacuum molding or the like and having a front end surface curved outwardly inserted into the folded flange 43. The heat insulating box 39 is formed by enclosing a heat insulating material 45 such as urethane foam in a space between the outer box 40 and the inner box 44.

On the other hand, reference numeral 46 denotes a heat insulating door. Reference numeral 47 denotes a door outer plate made of a steel plate or the like forming the outer surface of the heat insulating door 46, and its end is bent inward in a substantially U-shape. Reference numeral 48 denotes a door inner plate made of resin formed by vacuum molding or the like which forms the inner surface of the heat insulating door 46, and is integrally formed with a side wall 50 for fixing and supporting a door shelf 49 and the like. Then, after the end surface of the door inner plate 48 is overlapped with the end surface of the door outer plate 47 at the flat surface portion 51, a heat insulating material 52 such as urethane foam is sealed to form the heat insulating door 46. A side end of the heat-insulating door 46 is vertically supported by hinges 53 and 54 to form a rotatable door, which is attached to the front of the opening of the heat-insulating box 39 so as to be openable and closable.
Is formed.

Reference numeral 56 denotes a condensing pipe of the refrigeration cycle fixedly disposed at a predetermined distance from the flange 42 on the front side surface of the outer box 40 in order to prevent dew condensation on the periphery of the opening of the heat insulating box 39. . By not disposing the condensation pipe 56 in the folded flange 43 or in the space between the folded flange 43 and the side surface of the outer box 40, the width dimension of the flange 42 is fixed by inserting the front end face of the inner box 44 into the folded flange 43. It is only necessary to have the necessary dimensions for
It is as follows. If the gripping strength is increased by folding the front end face of the inner box 44 as shown in the figure or by deforming the bag shape of the folded flange of the outer box 40 together, it can be reduced to the range of 10 to 15 mm. .

Reference numeral 57 denotes a flat portion 4 on the front surface of the heat insulating box 39.
1 is an inclined portion formed in the inner box 44 continuously from
The inclination angle is set to be larger than the inclination angle toward the depth direction of the storage chamber 55 of the inner box 44 (generally less than 5 degrees with the draft angle of the urethane foaming jig minimized). The size of the inclination angle is determined by the wall thickness of the heat insulating box 39 and the width of the flat portion 41 if the depth of the inclined portion 57 is constant, but the width of the flat portion 41 is governed by the width of the flange 42. Therefore, the smaller the width of the flange 42, the larger the inclination angle.

For example, the slope 57 has a depth of 50 m.
m, when the wall thickness is 40 mm, the width of the flange 42 is 20 mm
The inclination angle is about 20 degrees, about 25 degrees at 15 mm, 10 m
m is about 30 degrees, and the depth of the slope 57 is 100 m
m, when the wall thickness is 40 mm, the width of the flange 42 is 20 m
m, the tilt angle is about 10 degrees, about 12.5 degrees at 15 mm,
It becomes about 15 degrees at 10 mm.

On the other hand, 58 is a storage room 55 of the heat insulating door 46.
The inclined portion is formed on the door inner plate 48 so as to be continuous with the flat portion 51 on the side periphery, and the inclined angle is substantially equal to the inclined angle of the inclined portion 57 of the inner box 44. By arranging the flat portion 41 of the heat insulating box 39 and the flat portion 51 of the heat insulating door 46, and the inclined portion 57 of the inner box 44 and the inclined portion 58 of the door inner plate 48 so as to face each other, A throat (narrow space) 59 is formed.

The wall thickness of the peripheral portion forming the flat portion 51 of the heat-insulating door 46 is smaller than the reference wall thickness facing the inside of the storage chamber 55, and the heat-insulating box is located within the reference wall thickness of the heat-insulating door 46. The throat 59 is formed with the front end of the body 39 biting.

Reference numeral 60 denotes a seal member attached to the inclined portion 58 of the door inner plate 48 of the heat-insulating door 46 over the entire periphery, and is formed by extrusion molding of vinyl chloride, silicon, or another elastomer material. The sealing member 60 is mounted by press-fitting its base into a concave portion 61 formed integrally when the door inner plate 48 of the inclined portion 58 is formed, and abuts against the inclined portion 57 of the inner box 44 when the heat insulating door 46 is closed. It is provided to be. Here, the depth of the inclined portion 58 can be made compact by containing the reference wall thickness facing the storage room 55 of the heat insulating door 46.

Reference numerals 62 and 63 denote a pair of magnetic bodies provided on the back surface of the inclined portion 57 of the inner box 44 and the inclined portion 58 of the door inner plate 48. The magnetic bodies 62 and 63 are, for example, permanent magnets processed into an appropriate shape and size. The magnetic bodies 62 and 63 are brought into close contact with a predetermined position by a positioning jig or the like before foaming of the heat insulating material, with their attracting polarities facing each other. Fixed.

Further, from the viewpoint of assemblability and cost, one of the magnetic members 62 and 63 is formed of a magnetized metal formed into a thin plate such as a steel plate, for example, and the inclined portion 57 of the inner box 44 or the door inner plate 48 is formed. There is also a case where it is closely fixed to the back surface of the inclined portion 58.

In the above configuration, when the heat insulating door 46 is closed, the sealing member 6 provided on the inclined portion 58 of the door inner plate 48 is provided.
0 abuts on the inclined portion 57 of the inner box 44 to seal the throat 59. At this time, the depth of the inclined portion 58 is
Of the side wall 50 for fixing the door shelf 49, the sealing member is normally rationally formed over the entire periphery including the upper end of the door without the side wall 50. 60 can be attached, which is convenient for the seal design.

Further, if an urging mechanism (for example, a suction mechanism, a latch mechanism, an elastic mechanism, a self-closing mechanism, etc.) for pressing the seal member 60 against the inclined portion 57 is used together, the sealing performance is further improved. In particular, when a pair of magnetic bodies 62 and 63 such as permanent magnets are opposed to the inclined portions 57 and 58 and used as a suction mechanism, a durable urging mechanism can be obtained relatively easily, which is convenient. In addition, even if one of the magnetic members 62 and 63 is made of a magnetized metal such as a steel plate, a substantially desired suction effect can be obtained, and the thinned plate and the processed shape having a high degree of freedom are advantageous in terms of ease of assembly and cost in the manufacturing process. is there. Note that the magnetic bodies 62 and 63 and the magnetized metal are not necessarily provided in the inclined portions 5.
It is not necessary to dispose the seal member 6 around the entire circumference of the seal members 6 and 58.
It may be partially disposed at a point effective for pressing the 0.

The seal of the throat 59 is formed by the inclined portion 57.
Therefore, the influence of the rotation trajectory of the heat insulating door 46 is suppressed, and a sealing component in the front-rear direction can be exerted, and sufficient sealing can be performed. In addition, since the inclination angle of the inclined portion 57 is set to be larger than the inclination angle in the depth direction of the inner box 44, the sealing performance is further improved, and the door closes like the conventional case having a small inclination angle. At this time, the seal is formed while being in contact with the inner box, so that the durability of the seal member 60 is not impaired, the opening / closing operation of the door becomes heavy, and no sliding noise is generated.

On the other hand, the sealing member is not in close contact with the flange 42 of the outer box 40 as in the prior art, and a part of the flange 42 is not exposed to the storage chamber 55 side. The incoming external heat does not directly enter the storage room 55 side, so that the amount of invading heat can be reduced. Flange 4
If the width dimension of No. 2 is reduced to the range of 10 to 15 mm, the amount of heat conduction can be further reduced, and the inclination angle of the above-mentioned inclined portion 57 can be advantageously increased.

Further, since the throat 59 is a small space, the convective heat transfer coefficient of the air before and after the seal member 60 is reduced, and the flow rate of the outside air heat through the seal member 60 is reduced. Further, since the attraction magnet is not built in the sealing member 60 as in the conventional case, the sealing member 6 can be formed.
The height of the throat 59 can be reduced by reducing the height of the zero.
Further, the front end of the heat-insulating box 39 is cut into the reference wall thickness of the heat-insulating door 46 so that the heat-insulating box 39 and the heat-insulating door 4
6, the continuous throat distance between the flat portions 41 and 51 and the inclined portions 57 and 58 can be increased, and the flow rate of outside air heat can be reduced.

As a result, the amount of heat entering the storage chamber 55 is reduced overall, the cooling load is reduced, and the operation time of the compressor is shortened. Power consumption can be reduced, and energy saving can be achieved.

Also, unlike the conventional case, the seal member 60 is not provided on the periphery of the opening, but is provided on the throat 59 of the inclined portions 57, 58 bent from the flat portions 41, 51. I can't see. Thereby, the aesthetic appearance from the side can be improved, and a good-looking refrigerator can be provided.

Further, since the inclined portion 58 is provided on the front surface of the inner box 44, the flat portion 41 of the opening is thinned, so that the inside of the storage chamber 55 can be seen wide when the heat insulating door 46 is opened.

In the present embodiment, the door outer plate 47 and the door inner plate 48 of the heat insulating door 46 are directly joined. However, in order to enhance the design effect, the door outer plate 47 and the door inner plate 48 are joined. The flat portion 51 may be formed with a resin sash interposed.
In addition, as an example of opening and closing the heat-insulating door, a rotary type was used,
It can be applied to a drawer type and other forms.

The outer box 40 and the inner box 44 are joined by inserting the front end of the inner box 44 into the bag-shaped folded flange 43.
Other joining methods such as a method of bonding and fixing the front end of No. 4 with an adhesive material such as hot melt may be used.

The arrangement of the condensation pipe 56 for preventing dew condensation is selected in accordance with the atmosphere around the opening and the degree of reduction in the surface temperature so that the heating amount is such that dew condensation does not occur. It is possible to use a part of the condenser piping arranged on the side instead of the dew condensation prevention pipe dedicated to the front edge of the opening as in the past, or to control the heating amount by using a heater as a heating element Therefore, it is sufficient that care can be taken so that unnecessary external heat is not transmitted to the front edge of the opening.

The width of the flange 42 is reduced by the inner box 44.
There is a limit from securing the fixed dimensions of and the strength of the outer box 40,
As the inclination angle of the inclined portion 57 governed by the width of the flange 42 increases, the reliability of the seal by the seal member 60 increases, and as the inclination angle decreases, the broken line between the inclined portion 57 and the side surface of the inner box 44 becomes less noticeable and has a good appearance. Therefore, an appropriate flange width and inclination angle may be set in consideration of the above-described various conditions.

The seal member 60 is attached to the inclined portion 58 of the door inner plate 48.
4 may be attached to the inclined portion 57.

(Embodiment 2) FIG. 3 is a sectional view of a periphery of an opening of a main body of a refrigerator according to Embodiment 2 of the present invention. In the following embodiments, the basic structure is the same as that of the first embodiment, and the basic structure is omitted from the description of the first embodiment, and only different components are described with new reference numerals.

In FIG. 3, reference numeral 64 denotes a heat insulating box, which has a configuration in which the magnetic body 62 is removed from the heat insulating box 39 of the first embodiment. Numeral 65 denotes a heat insulating door, and the magnetic material 66 is attached to the heat insulating door 46 of the first embodiment at a position opposite to the flange 42 of the heat insulating box 64 on the back surface of the peripheral flat portion 51 except for the magnetic material 63.

In the above configuration, when the heat insulating door 65 is closed, the suction action of the magnetic body 66 acts on the flange 42 made of a magnetized steel plate, and the heat insulating door 65 is drawn toward the heat insulating box 64. Therefore, the sealing member 60 provided on the inclined portion 58 of the door inner plate 48 is pressed against the inclined portion 57 of the inner box 44,
Seal the throat 59.

With such a configuration, not only the basic operation and effect of the shared portion shown in the first embodiment but also the following different effects can be obtained. That is, the flange 4
Since the magnetic material 2 can be used as a suction target of the magnetic material 66, a pair of magnetic materials is not required, and there is no need to newly provide a magnetized metal. It is also economical in terms of cost.

The magnetic member 66 does not necessarily need to be provided continuously around the periphery of the heat-insulating door 65.
It may be partially arranged in a range where the sealing property of 0 can be ensured.

(Embodiment 3) FIG. 4 is a sectional view of the periphery of an opening of a main body of a refrigerator according to Embodiment 3 of the present invention.

In FIG. 4, reference numeral 67 denotes a heat insulating box, which has a configuration in which the position of the magnetic body 68 is provided to face the seal member 60 with respect to the heat insulating box 39 of the first embodiment. Reference numeral 69 denotes a heat insulating door, which is the heat insulating door 46 of the first embodiment.
In contrast, the configuration is such that the position of the magnetic body 70 is attached to the back surface of the concave portion 61 of the door inner plate 48 in which the seal member 60 is accommodated. The magnetic members 68 and 70 are arranged on the same line with the seal member 60 interposed therebetween.

In the above configuration, when the heat insulating door 69 is closed, the magnetic body 68 and the magnetic body 70 are attracted to each other via the seal member 60, and the seal member 60 is pressed against the inclined portion 57 of the inner box 44. Then, the throat 59 is sealed.

With such a configuration, not only the basic functions and effects of the shared portion shown in the first embodiment but also the following different effects can be obtained. That is, since the magnetic members 68 and 70 attract each other with the seal member 60 interposed therebetween, the sealing direction and the suction direction coincide with each other, and the sealing property of the seal member 60 is ensured.

In the present embodiment, when the attraction force is reduced by increasing the distance between the magnetic bodies 68 and 70, it can be dealt with by increasing the magnetic force of the magnetic bodies 68 and 70.
Further, the magnetic bodies 68 and 70 do not necessarily have to be provided on the entire periphery of the heat-insulating box 67 and the heat-insulating door 69 continuously, and may be partially arranged as long as the sealing property of the seal member 60 can be ensured. Absent.

(Embodiment 4) FIG. 5 is a sectional view of a periphery of an opening of a main body of a refrigerator according to Embodiment 4 of the present invention.

In FIG. 5, reference numeral 71 denotes a heat insulating box, and the position of the magnetic body 72 fixed to the inner box 44 is provided in the heat insulating box 39 of the first embodiment so as to face the seal member 60. It has a configuration. Numeral 73 denotes a heat insulating door, and 74
Is a seal member. The sealing member 74 has a flexible magnetic body 75 on the upper inner surface serving as a sealing surface, and is arranged on the same line as the magnetic body 72.

In the above configuration, when the heat insulating door 73 is closed, the magnetic body 72 and the magnetic body 75 provided inside the seal member 74 are attracted to each other, and the seal member 74 is attracted to the inclined portion 57 of the inner box 44. Then, the throat 59 is sealed.

With such a configuration, not only the basic function and effect of the shared portion shown in the first embodiment but also the following different effects can be obtained. That is, the magnetic body 75 in the seal member 74 is sucked, and the magnetic bodies 72 and 75
Can be greatly reduced, so that the same reliable sealing performance as when the seal member 74 is directly sucked can be obtained. Further, since the magnetic body 75 can be mounted in the seal member 74 in advance, the work of incorporating the magnetic body in the manufacturing process is simplified.

In this embodiment, when the attractive force is reduced by increasing the distance between the magnetic members 68 and 70, it can be dealt with by increasing the magnetic force of the magnetic members 68 and 70.
Further, the magnetic bodies 68 and 70 do not necessarily have to be provided on the entire periphery of the heat-insulating box 67 and the heat-insulating door 69 continuously, and may be partially arranged as long as the sealing property of the seal member 60 can be ensured. Absent.

(Embodiment 5) FIG. 6 is a sectional view of a periphery of an opening of a main body of a refrigerator according to Embodiment 5 of the present invention.

In FIG. 6, reference numeral 76 denotes a heat insulating door, which is different from the heat insulating door 46 of the first embodiment in the structure of the door inner plate and the arrangement of the magnetic material. In addition to the concave portion 61 for accommodating the convex portion 60, the convex portion 78
Are integrally formed. Numeral 79 denotes a magnetic body mounted in the convex portion 78, which is provided so as to face the other magnetic body 62 provided on the inclined surface 57 of the inner box 44.

In the above configuration, when the heat insulating door 76 is closed, the magnetic members 62 and 79 are attracted to each other and the sealing member 6 is closed.
0 is pressed against the inclined portion 57 of the inner box 44 to seal the throat 59.

With such a configuration, not only the basic functions and effects of the shared portion shown in the first embodiment but also the following different effects can be obtained. That is, the magnetic material 79
Can be mounted at a desired position without any positioning trouble since it is housed in the convex portion 78. In addition, since the protrusion 78 protrudes into the throat 59, the distance between the magnetic bodies 62 and 79 is reduced, the suction force is increased, and the reliability of the seal is increased.

In this embodiment, the convex portion for mounting the magnetic body is provided on the inner plate side of the door.
It is also possible to provide the protrusion on the inner box side, or to provide both on the door inner plate and the inner box. The magnetic members 62 and 79 do not necessarily have to be provided continuously all around, and may be partially arranged as long as the sealing property of the seal member 60 can be ensured.

(Embodiment 6) FIG. 7 is a sectional view of the periphery of an opening of a main body of a refrigerator according to Embodiment 6 of the present invention.

In FIG. 7, reference numeral 80 denotes a heat insulating box, and a magnetic body 81 is provided at an intermediate position of the inclined portion 57 of the inner box 44 with respect to the heat insulating box 39 of the first embodiment. Reference numeral 82 denotes a heat insulating door, which is the heat insulating door 46 of the first embodiment.
In contrast, the structure of the door inner plate and the arrangement of the seal member and the magnetic body are different. Reference numeral 83 denotes a door inner plate of the heat-insulating door 82, in which two concave portions 84 and 85 are formed at a predetermined interval in the inclined portion 58, and a convex portion 86 is integrally formed continuously between the concave portions 84 and 85. Is formed. Reference numerals 87 and 88 denote sealing members housed and mounted in the concave portions 84 and 85, respectively, and 89 denotes a magnetic body mounted in the convex portion 86. The magnetic body 89 is arranged to face the magnetic body 81. Reference numeral 90 denotes an insulating space formed in the throat 59 and formed between the two seal members 87 and 88.

In the above configuration, when the heat insulating door 82 is closed, the magnetic members 81 and 89 are attracted to each other, and the two seal members 87 and 88 are almost evenly pressed against the inclined portion 57 of the inner box 44, and the throat is closed. 59 is double sealed.

With such a configuration, not only the basic function and effect of the shared portion shown in the first embodiment but also the following different effects can be obtained. In other words, the throat 59 sealing performance is reliably enhanced by the double sealing effect of the sealing members 87 and 88. Further, the insulating space 90 is a space having a small heat transfer coefficient with almost no convection, and also has a function of a buffer band for buffering a temperature difference between the inside and outside of the storage room, so that the invasion of outside air heat into the storage room 55 side is greatly reduced. Is done.

Further, since the magnetic body 89 is mounted by using the convex portion 86 formed integrally when forming the concave portions 84 and 85 for accommodating the two seal members 87 and 88, it is reasonable to include the positioning. This is also convenient on manufacturing facilities.

In this embodiment, the two seal members and the concave and convex portions for mounting the magnetic material are provided continuously. However, if a predetermined interval is required for the seal configuration, they may be arranged apart from each other. The two seal members and the uneven part for mounting the magnetic body are provided on the inner plate side of the door, but it is necessary to consider the appearance, but the uneven part is provided on the inner box side and the two seal members and the magnetic body are provided. You may. The magnetic bodies 81 and 89 do not necessarily have to be provided continuously all around, and may be partially arranged as long as the sealing properties of the seal members 87 and 88 can be ensured.

(Embodiment 7) FIG. 8 is a sectional view of a periphery of an opening of a main body of a refrigerator according to Embodiment 7 of the present invention.

In FIG. 8, reference numeral 91 denotes a heat insulating door, which is different from the heat insulating door 46 of the first embodiment in the structure of the sealing member. Reference numeral 92 denotes a sealing member made of a foamed heat insulating foam attached to the concave portion 61 of the door inner plate 48, and is formed of a material such as urethane or silicon.

In the above configuration, when the heat insulating door 91 is closed, the magnetic members 62 and 63 attract each other, the member 92 of the foaming heat insulating foam seal is pressed against the inclined portion 57 of the inner box 44, and the throat 59 is closed. Seal.

With such a configuration, not only the basic function and effect of the shared portion shown in the first embodiment but also the following different effects can be obtained. That is, since the seal member 92 does not incorporate a magnet therein, simple thick-wall molding is possible, and a foamed heat insulating foam having high heat insulating properties can be used. For this reason, the heat of external penetration flowing into the throat 59 can be greatly reduced.

In this embodiment, the seal member is provided on the inner plate side of the door. However, it is also possible to provide the seal member on the inner box side, although the appearance needs to be considered. Further, the magnetic bodies 62 and 63 do not necessarily have to be provided continuously over the entire circumference, and may be partially disposed as long as the sealing property of the seal member 92 can be ensured.

[0088]

As described above, according to the first aspect of the present invention, a heat-insulating door is provided at the front opening of a heat-insulating box having a storage room therein so as to be openable and closable, and a flat portion at the front edge of the heat-insulating box. And a throat formed by opposing the front surface of the inner box of the heat-insulating box and the outer surface of the door inner plate of the heat-insulating door to each other, and the flat surface formed on the periphery of the heat-insulating door. Because the thickness of the heat insulating wall of the section is thinner than the standard heat insulating wall thickness of the heat insulating door facing the storage room, the front end of the heat insulating box penetrates into the standard wall thickness of the heat insulating door, and the basic wall thickness is not increased and the throat distance Can be lengthened, and the intrusion of outside air heat can be reduced to save energy.

According to a second aspect of the present invention, in the first aspect of the invention, the heat-insulating door is a rotary door that opens and closes the opening of the heat-insulating box by vertically supporting the side end with a hinge. Therefore, the throat distance in the revolving door can be lengthened, the intrusion of outside air heat can be reduced, and energy can be saved.

According to a third aspect of the present invention, in the first aspect of the present invention, the heat-insulating door is a drawer-type door, and the throat distance in the drawer-type door can be increased.
Intrusion of outside air heat is reduced, and energy can be saved.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of a refrigerator according to a first embodiment of the present invention (a sectional view taken along line AA in FIG. 2).

FIG. 2 is a perspective view of Embodiment 1 of the refrigerator according to the present invention.

FIG. 3 is a sectional view of a main part of Embodiment 2 of the refrigerator according to the present invention.

FIG. 4 is a sectional view of a main part of a refrigerator according to a third embodiment of the present invention.

FIG. 5 is a sectional view of a main part of a fourth embodiment of the refrigerator according to the present invention.

FIG. 6 is a sectional view of a main part of a refrigerator according to a fifth embodiment of the present invention.

FIG. 7 is a sectional view of a main part of a refrigerator according to a sixth embodiment of the present invention.

FIG. 8 is a sectional view of a main part of a refrigerator according to a seventh embodiment of the present invention.

FIG. 9 is a cross-sectional view of a main part of the refrigerator of Conventional Example 1.

FIG. 10 is a cross-sectional view of a main part of a refrigerator of Conventional Example 2.

FIG. 11 is a cross-sectional view of a main part of a refrigerator of Conventional Example 3;

FIG. 12 is a cross-sectional view of a main part of a refrigerator of Conventional Example 4.

[Explanation of symbols]

 Reference Signs List 39 Insulated box 40 Outer box 41 Flat part of heat-insulated box 42 Flange 43 Folded flange 44 Inner box 46 Heat-insulated door 47 Door outer plate 48 Door inner plate 51 Flat part of heat-insulated door 55 Storage room 56 Condensation pipe (heating body) 57 Inclined portion of inner box 58 Inclined portion of door inner plate 59 Throat 60 Seal member 62, 63 Magnetic member 66 Magnetic member 68, 70 Magnetic member 72, 75 Magnetic member 74 Seal member 77 Door inner plate 78 Convex portion 79 Magnetic member 81, 89 magnetic body 83 door inner plate 84, 85 concave portion 86 convex portion 87, 88 seal member 92 seal member

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Kazue Yamato 4-5-2-5 Takaida Hondori, Higashi-Osaka City, Osaka Prefecture Inside Matsushita Refrigerating Machinery Co., Ltd. (72) Toshinori Noda 4-chome Takaida Moto-dori, Higashi Osaka City, Osaka Prefecture No.2 No.5 Matsushita Refrigeration Co., Ltd.

Claims (3)

[Claims] 1. An outer box, an inner box, an insulating box formed by enclosing a heat insulating material between the outer box and the inner box, and having an open front surface, and a storage formed inside the insulating box. A chamber, a door outer panel, a door inner panel, an insulating door formed between the door outer panel and the door inner panel by enclosing a heat insulating material to open and close an opening of the heat insulating box, and a front edge of the heat insulating box. And a throat formed by opposing a front surface of the inner box and a flat portion formed on a peripheral edge of the heat insulating door and an outer surface of the door inner plate, respectively, and a flat surface formed on a peripheral edge of the heat insulating door. A refrigerator characterized in that a thickness of a heat insulating wall of the portion is smaller than a standard heat insulating wall thickness of the heat insulating door facing the storage room. 2. The refrigerator according to claim 1, wherein the heat-insulating door is a rotary door that opens and closes an opening of the heat-insulating box by supporting a side end of the heat-insulating door vertically with a hinge. 3. The refrigerator according to claim 1, wherein the heat insulating door is a drawer type door.