JPH063040A - Heat insulated box body - Google Patents

Abstract

PURPOSE:To enable the sealing of a gap between a heat insulated door and a heat insulated box completely by arranging a heat insulated box to be provided with a recess which abuts a soft packing on the outer circumference of a heat insulated door equipped with a switch section for turning ON or OFF an electromagnet and with a flange having an attraction section which the electromagnet abuts. CONSTITUTION:A soft packing 13 as elastic body comprising a thermoplastic resin foam or the like is provided on the outer circumference of a heat insulated door 3 while an electromagnet 14 which is magnetized or demagnetized by turning ON or OFF a switch section 15 is provided circumferentially. On the other hand, a flange 17 having a recess 18 abutting the soft packing 13 and an attraction part 19 abutting the electromagnet 14 are formed on a heat insulated box 2 having a front opening being opened or closed with the heat insulated door 3. Then, a user of a refrigerator closes the heat insulated door 3 and when the switch section 15 is turned 'ON', the electromagnet 14 has a magnetic force and gets closely on the attraction part 19 of the flange 17 while the soft packing part 13 gets closely on the recess 18. Thus, the heat insulated door 3 is closed tight on the heat insulated box 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat insulating box used for refrigerators, showcases and the like.

[0002]

2. Description of the Related Art In recent years, in order to reduce the power consumption of refrigerators, the total heat insulation performance of the heat insulation box, that is, the heat absorption amount of the whole heat insulation box is reduced, and it is also an important technology to improve the heat insulation between the heat insulation door and the heat insulation box. Has become.

An example of the above-described heat insulating box will be described below with reference to the drawings. 5 to 7 are examples of conventional heat insulation boxes with vinyl chloride magnet packing, 1 is a heat insulation box, 2 is a heat insulation box having an outer shell made of iron, 3 is a heat insulation door, 4 is the above-mentioned It is a magnet packing attached to the outer periphery of the heat insulation door (see FIG. 5). The magnet packing 4 is located between the anchor 5 fitted to the heat insulation door 3, the base 6 of the anchor, the magnet chamber 7 and the magnet 8 therein, and the upper side of the magnet chamber 7 and the base 6. It is composed of a plurality of air chambers 10 partitioned by a partition wall 9 having a thickness of about 0.5 mm, and a few fins 11 attached to the air chambers 10 (see FIG. 6), and between the heat insulation box 2 and the heat insulation door 3 of the refrigerator. It is sealed so that cold air inside the refrigerator does not leak out of the refrigerator (see FIG. 7). The minimum distance between the heat insulating box 2 and the heat insulating door 3 is about 10 mm at present.

The thermal conductivity of this magnet packing in the adiabatic direction is about 0.08 kcal / mh ° C., and the heat absorption amount accounts for about 20 to 30% of the heat absorption amount of the entire heat insulating box,
It is very important to save electricity in the refrigerator as well as to improve the heat insulating property of the heat insulating material 12. In recent years, the heat insulating property is improved by decreasing the height of the magnet packing 4 or increasing the number of the air chambers 9. We are taking measures.

By the way, a 400-liter class 4-door refrigerator has a heat absorption amount of about 100 kcal / h when the temperature difference between the inside and the outside is 40 degrees, of which 25% = 25 kcal / h passes through the magnet packing 4, which is extremely high. It turns out to be big. If you can make this 25kcal / h0,
There is an effect that the power consumption (JIS) of the refrigerator can be reduced by about 5 KWH / month. In Japanese Utility Model Laid-Open No. 58-174689, three to four air chambers 9 are provided to improve heat insulation.

[0006]

However, in order to improve the heat insulating property by reducing the height of the magnet packing 4 and increasing the number of the air chambers 9, the heat absorption amount of the whole heat insulating box 1 is reduced by about 10%. It is possible, but if the height is reduced too much, the elasticity of the magnet packing 4 will decrease, and the heat insulating door 3 is warped.
With the conventional flatness of about ± 3 mm, a gap is created between the magnet packing 4 and the heat insulating box 2 and the seal deteriorates, cold air leaks and the amount of heat absorbed increases, and this seal is also improved. Magnet packing to do 4
Even if a means such as increasing the magnetic force is used, the gap is eliminated, but this time, there is a problem that the force for opening the heat insulating door 3 becomes too large, which cannot be implemented. Further, if the number of air chambers 6 is increased too much, the number of partition walls 9 increases, the ratio of the vinyl chloride resin portion in the heat insulating direction increases, the resin heat conduction increases, and the heat absorption amount increases.

That is, although the heat absorption amount of the heat insulating box having the above-mentioned structure of the magnet packing 4 can be reduced to about 10%, there is a problem that the heat insulating property cannot be further improved.

In view of the above problems, the present invention improves the heat insulating property between the heat insulating door 3 and the heat insulating box 2 without increasing the force for opening the heat insulating door 3, that is, the amount of heat absorbed from the magnetic packing to the whole heat insulating box body 1 (about 20 to 30%) to the limit to provide a heat insulation box body 1 of a refrigerator with improved heat insulation performance.

[0009]

In order to achieve the above object, the heat insulating box body of the present invention has a soft packing on the outer circumference, and an electromagnet and a heat insulating door provided with a switch portion for turning on and off the electromagnet. A heat insulating box having a recess for contacting the soft packing and a flange having an adsorbing part for contacting the electromagnet is provided.

The heat-insulating box of the present invention has a soft packing on the outer periphery, and has an electromagnet, a heat-insulating door having a switch part for turning on and off the electromagnet, and a disposing position of the electromagnet is a hinge of the heat-insulating door. And a heat insulating box having a recess with which the soft packing is brought into contact and a flange having an attracting portion with which the electromagnet is brought into contact.

Further, the heat insulating box of the present invention has a soft packing on the outer periphery, an electromagnet, a heat insulating door provided with a switch portion for turning on / off the electromagnet and changing the polarity, and a recess abutting the soft packing. And a heat insulating box having a flange embedded with the electromagnet, which is integrated with the electromagnet.

The heat-insulating box of the present invention has a thin plate-like soft packing on the outer peripheral surface, and has an electromagnet, a heat-insulating door provided with a switch section for turning on and off the electromagnet, and the soft packing and the electromagnet. It comprises a heat insulating box having a flange having a suction portion in contact therewith, and the heat insulating door and the heat insulating box flange are in close contact with each other by sandwiching a thin plate-like soft packing in a closed state.

[0013]

According to the first aspect of the present invention, with the above-described structure, the electromagnet is operated, the heat insulating door is brought into close contact with the adsorption portion of the flange of the heat insulating box, and the soft packing on the outer circumference is brought into close contact with the recess of the flange of the heat insulating box. Since the gap between the heat insulating door and the heat insulating box can be completely sealed by soft packing and can be made small, the effect of improving the heat insulating performance between the heat insulating door and the heat insulating box can be obtained.

Further, by inserting an electromagnet arranged on the side opposite to the hinge, the electromagnet is made to work, and even if there is no magnet on the entire circumference, the heat insulating door is brought into close contact with the suction portion of the flange of the heat insulating box, and a soft packing on the outer circumference is provided. By closely contacting the recess of the flange of the heat insulation box, the space between the heat insulation door and the heat insulation box can be completely sealed with soft packing and can be made smaller,
The effect of improving the heat insulation performance between the heat insulation door and the heat insulation box can be obtained.

Also, by making the electromagnet "closed", the electromagnet works, and the heat insulating door is brought into close contact with the flange of the heat insulating box.
By closely fitting the soft packing on the outer periphery to the recess of the flange of the heat insulation box, the space between the heat insulation door and the heat insulation box can be completely sealed by the soft packing and can be made smaller, so the heat insulation performance between the heat insulation door and the heat insulation box can be improved. Also, since the polarity of the electromagnet can be changed, it is possible to open the heat-insulating door without using force by switching the switch, similarly to closing the heat-insulating door in the heat-insulating box.

Further, by inserting the electromagnet, the electromagnet is made to work so that the heat insulating door can be brought into close contact with the flange of the heat insulating box by sandwiching the thin plate-like soft packing, and the space between the heat insulating door and the heat insulating box can be completely sealed and brought into close contact. Therefore, the effect of improving the heat insulating performance between the heat insulating door and the heat insulating box can be obtained.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS.

The same components as those of the conventional example described with reference to FIGS. 5 to 7 are designated by the same reference numerals and detailed description thereof will be omitted.

A soft packing 13 is provided on the outer periphery of the heat insulating door 3 and is made of a soft urethane foam or silicone foam having a width of 5 to 15 mm and a height of about 10 mm, or a thermoplastic resin foam such as vinyl chloride or styrene. It is an elastic body. The thermal conductivity of the soft packing 13 itself is 0.03 kcal / m.
It is about h ℃.

Numeral 14 is an electromagnet arranged on the outer periphery,
The switch portion 15 and the electric wire 16 are connected. Electromagnet 1
Reference numeral 4 is an on / off state of the switch unit 15, which has or does not have a magnetic force. Further, 17 is a flange of the heat insulating box 2, 18 is a recess having a depth of 2 to 5 mm that comes into contact with the soft packing 13, and 19 is an adsorption portion that comes into contact with the electromagnet 14.

In this structure, when the user of the refrigerator tries to close the heat insulation door 3, the heat insulation door 3 is manually closed.
Further, when the switch portion 15 is turned “on” manually or by voice, the electromagnet 14 has magnetic force and the attraction portion 1 of the flange 17
9, the soft packing 13 is closely fitted to the recess 18,
The heat insulating door 3 is pressed against the heat insulating box 2 to close the door.

Here, the gap between the heat insulating door 3 and the heat insulating box 2 can be reduced to about 5 mm, which is half that of the conventional one, and the thermal conductivity of the soft packing 13 is the magnet packing 4.
Since it is about 30%, the heat absorption amount of the heat insulating box body 1 can be reduced by about 15%. That is, in the 400-liter class four-door refrigerator, the heat absorption amount can be reduced from the conventional 100 kcal / h to 85 kcal / h. It is possible to save about 3KWH / month for power saving.

Further, even when the heat insulating door 3 is warped by about ± 3 mm, the soft packing 13 is provided in the recess 18 with an electromagnet of 5 mm.
Since it is pressed down (that is, compressed by half), the gap between the heat insulating door 3 and the heat insulating box 2 is completely sealed, and when the user of the refrigerator tries to open the heat insulating door 3,
When the switch portion 15 is turned "off", the electromagnet 14 is cut off, and the repulsive force of the soft packing 13 compressed by a factor of 2 can open the door slightly without any great force.

The more the soft packing 13 is compressed to make the gap between the heat insulating door 3 and the heat insulating box 2 smaller, the better the heat insulating performance is. However, even when the heat insulating door 3 is warped by about ± 3 mm, even this specification is about 5 mm. Is the limit.

As described above, the soft packing 13 can be brought into close contact with the recess 18 of the heat insulating box 2 by the heat insulating door 3 provided with the electromagnet 14, and the heat insulating performance improving effect can be obtained.

A second embodiment will be described with reference to FIG.
Regarding the same configuration as the example described in FIGS. 1 and 5 to 7,
The same numbers are assigned and detailed explanations thereof are omitted.

Reference numeral 20 is a hinge in which the heat insulating door 3 is attached to the heat insulating box 2 and is rotatable, and 21 is an electromagnet installed on the side opposite to the hinge.

In this structure, when the heat insulating door 3 of the refrigerator is closed and the switch portion 15 is turned "on", the electromagnet 21 has a magnetic force to adsorb the adsorption portion 190 of the flange 17 and the soft packing 13 is brought into close contact with the recess 18. , Insulation door 3 to insulation box 2
Press against and close the door.

Conventionally, the magnet 8 is arranged all around the heat insulating door 3, but since the electromagnet 21 is arranged not on the hinge side or the upper and lower sides but on the side opposite to the hinge, it is most effective without the magnet on all sides. In addition, the soft packing 13 on the outer periphery can be brought into close contact with the recess 18 of the flange 17 of the heat insulating box 2.

As a result, the gap between the heat insulating door 3 and the heat insulating box 2 is
It can be narrowed to about 5 mm, which is half of the conventional one, and the thermal conductivity of the soft packing 13 is about 30% of that of the magnet packing 4.
It can be reduced by about 5%.

That is, in the 400-liter class 4-door refrigerator, the heat absorption amount can be reduced from the conventional 100 kcal / h to 85 kcal / h. It is possible to save about 3KWH / month for power saving. Further, even if the heat insulating door 3 is warped by about ± 3 mm, the soft packing 13 is pressed by the electromagnetic force about 5 mm into the recess 18 (that is, ½ compression). The gap seal is perfect, and when the user of the refrigerator tries to open the heat insulating door 3, when the switch 15 is turned "off", the electromagnet 14 is cut off and the soft packing 13 compressed by a half is repulsed. There is also the effect that the door can be opened slightly with force and opened without great force.

The more the soft packing 13 is compressed to make the gap between the heat insulating door 3 and the heat insulating box 2 smaller, the better the heat insulating performance is. However, when the heat insulating door 3 is warped by about ± 3 mm, this specification is about 5 mm. Is the limit.

As described above, since the electromagnets 21 are arranged not on the hinge side or on the upper and lower sides but on the side opposite to the hinges, the soft packing 13 on the outer circumference of the heat insulating door 3 is most effectively insulated even if there is no magnet on the entire circumference. It is possible to make close contact with the recess 18 of the second flange 17, and the effect of improving the heat insulation performance can be obtained.

A third embodiment will be described with reference to FIG.
The same components as those in the examples described with reference to FIGS. 1 to 2 and 5 to 7 are designated by the same reference numerals, and detailed description thereof will be omitted.

Reference numeral 22 is a switch unit capable of converting the polarity,
Reference numeral 23 is a pair of electromagnets arranged in the heat insulating box 2 and the heat insulating door 3.

In such a structure, the switch 2
2 is “closed”, the pair of electromagnets 23 is SN or N.
-At the S pole, an attractive force acts on the heat insulating box 2 and the heat insulating door 3, and the heat insulating door 3 is closed.
The heat insulation box 2 and the heat insulation door 3 repel each other by being magnetized to the -S or N-N pole, and the heat insulation door 3 opens.

That is, by closing the pair of electromagnets 23, the heat insulating door 3 is brought into close contact with the flange 17 of the heat insulating box 2 and the soft packing 13 on the outer circumference is brought into close contact with the recess 18 of the flange of the heat insulating box 3. Since the gap between the heat insulating door 3 and the heat insulating box 2 can be completely sealed by soft packing and can be made small, the effect of improving the heat insulating performance between the heat insulating door 3 and the heat insulating box 2 can be obtained. Further, since the electromagnet 23 can change the polarity, there is an effect that the heat insulating door 3 can be opened without using force by switching the switch, similarly to closing the heat insulating door 3 in the heat insulating box 2.

In the case of "closed", the soft packing 13 comes into close contact with the recess 18 and the heat insulating door 3 is pressed against the heat insulating box 2 to close it. Here, the gap between the heat insulation door 3 and the heat insulation box 2 is
It can be narrowed to about 5 mm, which is half of the conventional one, and the thermal conductivity of the soft packing 13 is about 30% of that of the magnet packing 4.
It can be reduced by about 5%. In other words, in the 400-liter class 4-door refrigerator, the conventional 100 kcal / h to 85 kc
The heat absorption can be reduced up to al / h. In power saving, about 3KWH /
The moon is also possible.

As described above, the switch section 2 capable of changing the polarity
By operating the pair of electromagnets 23 in 2, the gap between the heat insulating door 3 and the heat insulating box 2 can be completely sealed by the soft packing 13 and can be reduced, so that the heat insulating performance between the heat insulating door 3 and the heat insulating box 2 can be improved. The effect is obtained, and since the electromagnet 23 can change the polarity, the heat insulating door 3 can be opened without using force by switching the switch, similar to closing the heat insulating door 3 to the heat insulating box 2. Is obtained.

A fourth embodiment will be described with reference to FIG.
1 to 3 and 5 to 7, the same components as those described above are designated by the same reference numerals and detailed description thereof will be omitted.

Reference numeral 24 is a metal frame for forming a flat surface on the flange 25 side of the heat insulating box 2 on the outer periphery of the heat insulating door 3, and has a thickness of 5
A metal square bar of mm is welded to the frame body and assembled to give a flatness of ± 0.5 mm or less. The electromagnet 14 is joined to a part of the frame body 24. Reference numeral 26 is a thin plate-like soft packing made of a flexible urethane foam or silicone foam having a cross section of about 1 mm, or a thermoplastic resin foam such as vinyl chloride or styrene. Further, the flange 25 has no unevenness.

In such a structure, when the user of the refrigerator tries to close the heat insulation door 3, the heat insulation door 3 is manually closed, and the switch section 15 is turned on manually or by voice.
Then, the electromagnet 14 has a magnetic force and is brought into close contact with the attraction portion 19 of the flange 17, and the soft packing 26 is attached to the flange 17.
The heat insulating door 3 is pressed against the heat insulating box 2 to close it.

Here, the clearance between the heat insulating door 3 and the heat insulating box 2 should be narrowed to the flatness of ± 0.5 mm because the frame body 24 has a flat surface on the flange 25 side of the heat insulating box 2 on the outer circumference of the heat insulating door 3. The thickness of the soft packing 26 is 1 mm
The heat insulation door 3 can be brought into close contact with the heat insulation box 2 and closed.

This means that the conventional gap of about 10 mm can be reduced to 1 mm, and the heat absorption amount of the heat insulating box 1 is 20%.
It can be reduced to some extent. That is, by filling the gap between the heat insulating door 3 and the heat insulating box 2 to the limit of 1 mm by using the frame 24,
In the case of a 00-liter class 4-door refrigerator, the conventional 100
The heat absorption can be reduced from kcal / h to 80 kcal / h. In terms of power saving, about 4 KWH / month is possible, and the effect of improving the heat insulation performance between the heat insulation door 3 and the heat insulation box 2 can be obtained in the first or more aspects.

As described above, since the frame body 24 of the metal square bar forms a flat surface on the flange 25 side of the heat insulating box 2 on the outer circumference of the heat insulating door 3, the heat insulating door 3 is provided with a gap of 1 mm in thickness of the thin plate-like soft packing 26. Can be closed by closely contacting with the heat insulating box 2, and a dramatic effect of improving heat insulating performance between the heat insulating door 3 and the heat insulating box 2 can be obtained.

[0046]

As is apparent from the above description, according to the first aspect of the present invention, the heat insulating door having the soft packing on the outer periphery and having the electromagnet and the switch portion for turning the electromagnet on and off,
Since it is configured by a heat insulating box having a recess having a contact with the soft packing and a suction portion having a contact with the electromagnet, the electromagnet works by inserting the electromagnet, and the heat insulating door is connected to the flange of the heat insulating box. By tightly adhering to the suction part and adhering the soft packing on the outer periphery to the recess of the flange of the heat insulation box, the space between the heat insulation door and the heat insulation box can be completely sealed by the soft packing and can be made smaller,
The effect of improving the heat insulation performance between the heat insulation door and the heat insulation box can be obtained.

Further, by inserting an electromagnet arranged on the side opposite to the hinge, electromagnetic force is exerted, and even if there is no magnet on the entire circumference, the heat insulating door is brought into close contact with the suction portion of the flange of the heat insulating box, and a soft packing on the outer circumference is provided. Since the gap between the heat insulating door and the heat insulating box can be completely sealed by the soft packing and can be made small by closely contacting with the recess of the flange of the heat insulating box, the effect of improving the heat insulating performance between the heat insulating door and the heat insulating box can be obtained.

Also, by closing the electromagnet, the electromagnet works to bring the heat insulating door into close contact with the flange of the heat insulating box, and the soft packing on the outer circumference to come into close contact with the recess of the flange of the heat insulating box. The space between the heat-insulating boxes can be completely sealed with soft packing and can be made small, so that the heat-insulating performance between the heat-insulating door and the heat-insulating box can be improved, and since the electromagnets can change the polarity, the heat-insulating door is closed in the heat-insulating box. Similarly, by switching the switch, it is possible to open the heat insulation door without using force.

By inserting the electromagnet, the electromagnet is made to work, and the heat insulating door can be brought into close contact with the flange of the heat insulating box by sandwiching the thin plate-like soft packing, and the space between the heat insulating door and the heat insulating box can be completely sealed, and Since they can be in close contact with each other, the heat insulating performance between the heat insulating door and the heat insulating box can be improved.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a main part of a heat insulating box in an embodiment of the present invention.

FIG. 2 is a sectional perspective view of a main part of a heat insulating box in the second embodiment of the present invention.

FIG. 3 is a sectional view of an essential part of a heat insulating box in a third embodiment of the present invention.

FIG. 4 is a sectional perspective view of a main part of a heat insulating box in a fourth embodiment of the present invention.

FIG. 5 is a perspective view of a conventional heat insulating box.

FIG. 6 is a sectional view of a conventional magnet packing.

FIG. 7 is a cross-sectional view of the main part of the conventional heat insulating box taken along the line AA ′ in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Insulation box body 2 Insulation box 3 Insulation door 13 Soft packing 14 Electromagnet 15 Switch part 17 Flange 18 Recessed part 19 Adsorption part 20 Hinge 21 Electromagnet 22 arranged on the side opposite to the hinge 22 Polarity switchable part 23 Pair of electromagnets 24 Frame Body 26 Thin-plate soft packing

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazuo Shimabara 3-22 Takaidahondori, Higashi-Osaka City, Osaka Prefecture Matsushita Refrigerator Co., Ltd. (72) Inventor Toshio Kotori 3-22, Takaidahondori, Higashi-Osaka, Osaka Address: Matsushita Refrigerating Machinery Co., Ltd. (72) Inventor Nobuo Ohashi, 3-22 Takaida Hondori, Higashi-Osaka City, Osaka Prefecture Matsushita Refrigerating Machinery Co., Ltd. (72) Takuya Matsumoto 3-22, Takaidamoto-dori, Higashi-Osaka City, Osaka Matsushita Cold Machinery Co., Ltd. (72) Inventor Shingo Obata 3-22 Takaida Hondori, Higashi-Osaka City, Osaka Prefecture Matsushita Cold Machinery Co., Ltd. (72) Inventor Kazuhiro Moriyoshi 3-22 Takaida Hondori, East Osaka City, Osaka Matsushita Cold Machinery Within the corporation

Claims (4)

[Claims] 1. An adiabatic door having a soft packing on the outer periphery thereof and having an electromagnet and a switch portion for turning on and off the electromagnet,
An adiabatic box comprising a recess that abuts the soft packing and an adiabatic box that has a flange with an adsorbing portion that abuts the electromagnet. 2. An adiabatic door having an electromagnet and a switch part for turning on and off the electromagnet, the electromagnet having a soft packing on the outer periphery,
An insulating box body in which the electromagnet is disposed on the side opposite to the hinge of the adiabatic door, and further comprises a heat insulating box having a recess that abuts the soft packing and a flange having a suction portion that abuts the electromagnet. 3. An electromagnet having a soft packing on the outer periphery, an insulating door provided with an electromagnet, a switch section for turning on and off the electromagnet, and changing the polarity, a recess abutting the soft packing, and an electromagnet integrated with the electromagnet. And a heat insulating box having a buried flange. 4. A thin plate-like soft packing is provided on a flat surface of the outer circumference, and an electromagnet, a heat insulating door in which a switch part for turning on and off the electromagnet is arranged, and a flange having a suction part that abuts on the soft packing and the electromagnet. A heat insulating box body comprising a heat insulating box, wherein the heat insulating door and the heat insulating box flange are in close contact with each other with a thin plate-like soft packing interposed therebetween in a closed state.