JP7246246B2 - Cooling system - Google Patents

Description

TECHNICAL FIELD The present invention relates to a cooling device having a magnetic gasket on the inner periphery of a door .

In a refrigerator, the inside of the refrigerator (hereinafter also referred to as the "inside") is insulated to maintain a low temperature. should be prevented from entering the chamber. For this reason, when the door is closed, it is required that the opening end face of the heat insulating box, which is the storage part, and the peripheral edge portion of the door contacting the opening end face are held in close contact over the entire circumference. Therefore, in a refrigerator, a flexible magnetic gasket is generally installed on the inner periphery of the door, and when the door is closed, the magnetic force of the magnetic gasket keeps the heat insulating box and the door in close contact with each other. there is

Refrigerators are operated continuously on a daily basis, unlike other household electrical appliances, so there is a strong demand for energy saving in refrigerators. For this reason, the magnet gasket has been devised to ensure that the heat insulating box body and the door are in close contact with each other over the entire circumference, and to prevent heat transfer from the magnet gasket to the interior of the refrigerator.

For example, by bringing the magnet of the magnetic gasket attached to the door into direct contact with the opening end face of the heat insulating box, the magnetic force (attractive force) acting on the opening end face is strengthened, and the door and the heat insulating box are in close contact with each other. Various structures have been disclosed (see, for example, Patent Document 1).

FIG. 7 is a cross-sectional view of a main part showing the state of close contact between the door and the open end face of the heat insulating box disclosed in Patent Document 1. As shown in FIG. The heat insulating box body shown in FIG. 7 is a refrigerator main body, and is composed of an outer box 70, an inner box 72, and a heat insulating material 71 filled between the outer box 70 and the inner box 72. there is A magnetic gasket 60 is attached to the peripheral edge of the back side of the door 50 (the side facing the open end face of the heat insulating box), while the peripheral edge of the front face (open end face) of the outer box 70 is made of a magnetic material. A flange portion 72a is provided. The magnet gasket 60 adheres to the flange portion 72a, so that the door 50 and the heat insulating box are brought into close contact via the magnet gasket 60. - 特許庁As a result, the space between the door 50 and the outer box 70 is effectively sealed, and the storage chamber 80 (inside) is thermally isolated from the outside. Furthermore, heat transfer between the interior and exterior of the refrigerator is suppressed by the heat insulating material 71 filled between the outer casing 70 and the inner casing 72 . With such a configuration, the inside of the storage chamber 80 is maintained at a predetermined temperature.

The door 50 includes a door inner plate 51 , a mounting groove 52 and a heat insulating material 71 , and a refrigerant pipe 90 is arranged near the outer box 70 inside the heat insulating box.

Here, the magnet gasket 60 includes a magnet holding portion 61 , a magnet 62 , a mounting portion 63 , and a bag-like portion 64 connecting the magnet holding portion 61 and the mounting portion 63 .

The magnet holding part 61 does not have a conventional bag-like shape into which a string-like magnet is inserted, but has a U-shaped cross-section with an open surface on the side of the heat insulating box that serves as an attracting surface. A wedge-shaped protrusion is integrally formed on the magnet holding portion 61 from the U-shaped bottom surface toward the magnet 62 . This wedge-shaped ridge is provided on the magnet gasket 60 over the entire circumference.

The magnet 62 is housed inside the magnet holding portion 61 . The magnet 62 is arranged so that the outer flat surface 62a exposed from the magnet holding portion 61 faces the open end surface of the heat insulating box when the door is closed. Further, an insertion groove with a narrow opening (entrance) is formed on the lower surface side of the magnet 62 . By fitting the wedge-shaped ridge of the magnet holding portion 61 into the fitting groove by utilizing its elasticity, the magnet 62 is attached so as not to slip out of the magnet holding portion 61 .

Two grooves 62b are provided on the outer flat surface 62a of the magnet 62, and heat conduction is suppressed by the air layer of the grooves 62b. Since the magnet 62 is in direct contact with the opening end face of the heat insulating box, a sufficient attractive force can be obtained without attenuation of the magnetic force.

Furthermore, in order to prevent heat from outside air from entering from the outside of the refrigerator due to the heat conduction of the magnet gasket itself, a magnet gasket with a block-shaped heat insulating material on the surface facing the outside of the refrigerator has been disclosed (for example, patent Reference 2). This magnet gasket has a hollow chamber, a magnet chamber on the solid side of the hollow chamber for heat insulation, and a block-shaped heat insulating material on the outer surface of the wall surface of the hollow chamber that is in contact with the air. With such a configuration, heat transmitted by heat conduction and convection of the air in the hollow room and heat transmitted through the magnet gasket itself are blocked by the heat insulating material, and the heat is suppressed from being transmitted to the inside of the refrigerator. Therefore, the cooling efficiency for cooling the inside of the heat insulating box can be improved.

In another prior example, in order to prevent external heat from entering the refrigerator from the vicinity of the magnet of the magnet gasket of the door, the magnet gasket has a configuration in which an air layer is provided between the magnet and the magnet holding portion. (see, for example, Patent Document 3). The refrigerator disclosed in Patent Document 3 has a refrigerator body, a door, and a magnet gasket on the peripheral edge of the door. The magnet gasket includes a mounting portion attached to the door, a magnet holding portion for holding a magnet therein, and a flexible portion connecting the mounting portion and the magnet holding portion in an expandable and contractable manner. This magnet gasket is characterized in that an air layer is formed inside the magnet holding portion between the magnet and the inner peripheral surface of the magnet holding portion.

As a result, the size of the magnet can be reduced while retaining the magnetic force of the attracting surface portion of the magnet, and the heat transferred to the magnet can be reduced from entering the refrigerator through the magnet holding portion.

JP 2005-188840 A JP 2009-109053 A JP 2011-237117 A

In the magnet gasket described in Patent Document 1 shown in FIG. 7, since the magnet 62 is in direct contact with the opening end face of the heat insulating box, a large magnetic force acts on the heat insulating box, and the magnet gasket 60 and the heat insulating box are separated from each other. It is possible to obtain the effect of increasing the suction force in. However, since the magnet 62 is in direct contact with the opening end face of the heat insulating box, there is a possibility that the magnet 62 will be chipped (damaged) as the number of times the door 50 is opened and closed increases. Furthermore, dust tends to accumulate in the recessed groove 62b of the magnet 62, and when the magnet 62 is brought into contact with the opening end face of the heat insulation box, the dust creates a gap between the magnet 62 and the opening end face of the heat insulation box. heat insulation performance is likely to decrease. Moreover, the magnet 62 may come off from the magnet holding portion 61 due to long-term use.

The magnetic gasket described in Patent Document 2 has a block-shaped heat insulating material on the surface of the wall surface of the hollow chamber that is in contact with the outside air. insulation. Therefore, the heat efficiency of the refrigerator can be improved. However, since the heat insulating material is thicker and more rigid than the gasket member (that is, the portion of the magnet gasket excluding the magnet and the heat insulating material), the flexibility of the magnet gasket as a whole is reduced. For this reason, it may be difficult for the magnet gasket to uniformly adhere to the opening end surface of the heat insulating box over the entire circumference. For this reason, the heat insulation performance of the magnet gasket may become insufficient.

In the magnet gasket described in Patent Document 3, an air layer is formed between the magnet and the magnet holding portion, so the heat transferred from the opening of the heat insulating box to the magnet is blocked by this air layer. be Therefore, it is possible to suppress the heat entering from the outside through the magnet gasket. However, if the air layer is provided inside the magnet holding portion, the thickness of the entire magnet gasket must be increased, or the magnet must be made thinner. If the thickness of the magnet gasket is increased, the gap between the heat-insulating box and the door becomes larger, which easily causes the inflow of outside air into the inside of the refrigerator and the outflow of cold air from the inside to the outside of the refrigerator. On the other hand, if the magnet is made thin, the magnetic force is weakened, making it difficult to evenly adhere the magnet gasket to the open end surface of the heat insulating box. For this reason, the heat insulation performance of the magnet gasket may become insufficient.

An object of the present disclosure is to solve the above-described problems of the prior art , and to improve the heat insulation performance of a cooling device.

A cooling device according to an aspect of the present disclosure includes a housing space that opens forward, a heat insulating box that surrounds the opening and has an open end face that faces forward, and the heat insulating box that allows the opening to be opened and closed. A door attached to the body, and a magnet gasket attached to an inner peripheral edge of the door facing the opening end face when the opening is closed, the magnet gasket holding the magnet and the magnet. a magnet holding portion; and a heat insulating sheet provided between the magnet and the magnet holding portion , wherein the magnet faces the door when the door closes the opening. It has a side plane, an opening side surface facing the opening end surface, and an inside side surface that connects the door side plane and the opening side surface on the inside in the width direction of the heat insulating box body, and the inside side surface is the When the door closes the opening, the direction facing the opening is a curved surface that gradually changes inward in the width direction from the door side plane toward the side surface of the opening, and the heat insulating sheet is , is one sheet, is formed with a constant thickness, and is arranged so as to be in contact with the door-side flat surface and the inner side surface of the chamber.

According to the present disclosure, it is possible to improve the heat insulation performance of the magnet gasket.

1 is a schematic perspective view of a refrigerator according to an embodiment of the present disclosure; FIG. FIG. 2 is a cross-sectional view of main parts taken along plane A in FIG. 1, showing the structures of a heat insulating box, a magnet gasket, and a door portion in the refrigerator according to the present embodiment. FIG. 4 is a diagram showing the structure of the magnet gasket in the refrigerator according to the present embodiment, and is a cross-sectional view cut in a direction perpendicular to the length direction. FIG. 4 is a diagram showing a state in which a magnet and a heat insulating sheet are attached to each other in the refrigerator according to the present embodiment, and is a cross-sectional view taken in a direction perpendicular to the length direction. The figure which shows the model area|region of the simulation which calculated the amount of heat which penetrated from a gasket peripheral part. FIG. 4 is an enlarged view of the magnet periphery of the gasket in the model area; The figure which shows the result (invasion heat amount) of a simulation. Sectional drawing which shows the modification of a magnet in the refrigerator which concerns on this Embodiment. Sectional drawing which shows an example of the conventional gasket structure.

A magnet gasket and a refrigerator according to embodiments of the present disclosure will be described below with reference to the drawings. The embodiments shown below are merely examples, and do not exclude various modifications and application of techniques that are not explicitly described in the following embodiments. Also, each configuration of the embodiments can be modified in various ways without departing from the spirit of the embodiments. Furthermore, each configuration of the embodiment can be selected or combined as needed.

In principle, the same elements are denoted by the same reference numerals throughout the drawings for describing the embodiments, and the description thereof may be omitted.

[1. composition]
In the following description, the side on which the doors 21 to 26 are located is referred to as the front, and the opposite side is referred to as the rear. In addition, left and right are defined based on the case of viewing from the front to the back. Both the left direction and the right direction are collectively referred to as the width direction. Further, the direction toward the widthwise center CL is referred to as the widthwise inner side, and the direction away from the widthwise center CL is referred to as the widthwise outer side.

[1-1. Refrigerator configuration]
Hereinafter, the overall configuration of the refrigerator 1 will be described with reference to FIG. FIG. 1 is a schematic perspective view of a refrigerator 1 (cooling device) according to an embodiment of the present disclosure.

The refrigerator 1 includes a heat insulating box body 10 having a storage space 10d (hereinafter also referred to as "inside") formed therein and opening to the front side, and a plurality of doors 21 attached to the heat insulating box body 10 so as to be openable and closable. 26, and a later-described magnet gasket 30 provided on the inner periphery of these doors 21-26. The interior 10d is partitioned by a partition plate (not shown) into a refrigerator compartment 11, a second freezer compartment 12, an ice making compartment 13, a first freezer compartment 14, and a vegetable compartment 15. .

The inner peripheral edges of the doors 21 to 26 refer to the outer peripheral edges of the surfaces facing the inside 10d when the doors 21 to 26 are closed. Further, the inner periphery of the doors 21 to 26 means the heat insulating box body 10, the refrigerating compartment 11, the second freezing compartment 12, the ice making compartment 13, the first The opening end face 10A of the freezer compartment 14 and the vegetable compartment 15 (that is, the surface around the opening, see FIG. 2) faces the magnet gasket 30 therebetween.

In the following description, the doors 21 to 26 will be referred to as the door 20 unless otherwise distinguished.

The insulating box body 10 has a refrigerating compartment 11 at its top, a second freezing compartment 12 and an ice making compartment 13 arranged side by side under the refrigerating compartment 11, a first freezing compartment 14 at its bottom, and an ice making compartment 13 at its bottom. The vegetable compartment 15 is arranged in the lower part.

In the present embodiment, the refrigerator compartment 11, the second freezer compartment 12, the ice making compartment 13, the first freezer compartment 14, and the vegetable compartment 15 are provided as described above. configuration is not limited. For example, if it is a device that stores and refrigerates refrigerated goods, such as a refrigerator having only a refrigerating compartment, a refrigerator having only a freezing compartment, a refrigerator having a refrigerating compartment and only one or three or more freezing compartments. Needless to say, it can be applied without any limitation.

Refrigerating compartment 11, second freezing compartment 12, ice making compartment 13, first freezing compartment 14 and vegetable compartment 15 have openings as described above. A door 20 is arranged in each opening. For example, the refrigerating chamber 11 has a rotating type refrigerating chamber right door 21 and a refrigerating chamber left door 22, and has a double door structure. Inside the refrigerator compartment 11, a refrigerator compartment shelf (not shown) and a refrigerator compartment case (not shown) are arranged. The second freezer compartment 12, the icemaker 13, the first freezer compartment 14, and the vegetable compartment 15 are drawer-type storage compartments, respectively. A door 25 and a vegetable compartment door 26 are integrally provided.

The temperature of the refrigerating compartment 11 is set to be in the range of about 1° C. to 5° C., which is a non-freezing temperature range for refrigerating storage. The temperature of the vegetable compartment 15 is set in a refrigerating temperature range equivalent to that of the refrigerating compartment 11 or in a range of about 2° C. to 7° C., which is a vegetable temperature range slightly higher than the refrigerating temperature range. The first freezer compartment 14 is normally set to a temperature range of about -22°C to -15°C for cryopreservation. C. to -25.degree. C. can also be set.

The temperature of the second freezer compartment 12 is set in the same freezer temperature range as that of the first freezer compartment 14 or in a temperature range of -20°C to -12°C, which is a temperature range slightly higher than the freezer temperature range. The ice-making compartment 13 makes and stores ice by an automatic ice-making machine (not shown) provided in the upper part of the compartment using water sent from a water storage tank (not shown) in the refrigerating compartment 11 .

The set temperature ranges in the refrigerator compartment 11, the second freezer compartment 12, the ice making compartment 13, the first freezer compartment 14, and the vegetable compartment 15 are examples of typical temperature ranges, and the It is not limited to the temperature range, and is appropriately set according to each usage pattern.

The refrigerator 1 has a machine room (not shown). This machine room accommodates high-pressure side components of the refrigeration cycle, such as a compressor and a dryer for removing moisture. A refrigeration cycle is a series of refrigerants comprising in sequence a compressor (not shown), a condenser (not shown), a pressure reducer capillary (not shown), and a cooler (not shown). It is formed from flow channels. For example, isobutane, which is a hydrocarbon-based refrigerant, is sealed as a refrigerant in this refrigerant flow path.

Note that the configuration of the refrigerating cycle of the refrigerator 1 of the present disclosure is not limited to the above configuration, and any configuration can be used as long as it generates cold air in the temperature range required for refrigeration and freezing. can also be used.

[1-2. Main parts of refrigerator and configuration of magnet gasket]
2 to 4, the configuration of the essential parts of the refrigerator 1 and the magnet gasket 30 will be described. FIG. 2 is a diagram showing the structure of the insulating box 10, the magnet gasket 30 and the door 20 in the refrigerator 1 according to the present embodiment, and is a cross-sectional view of the essential parts along plane A indicated by the dashed-dotted line in FIG. be. FIG. 3 is a view showing the structure of the magnet gasket 30 in the refrigerator 1 according to the present embodiment, and is a cross-sectional view (horizontal cross-sectional view) cut in a direction perpendicular to the length direction (extending direction of the magnet gasket 30). ). FIG. 4 is a diagram showing a state in which the magnet and the heat insulation sheet are stuck together in the refrigerator according to the present embodiment, and is a cross-sectional view taken in a direction perpendicular to the length direction.
As shown in FIG. 2, the heat insulating box body 10 includes an outer box 10a using a magnetic material (for example, steel plate), an inner box 10b molded from a resin such as ABS resin, and an outer box 10a and an inner box 10b. and a heat insulating member 10c such as a hard foamed polyurethane resin that fills the space between them while foaming.

In the refrigerator 1, when the refrigerating compartment 11 (see FIG. 1) and the like are cooled, part of the outer case 10a may also be cooled and dew condensation may occur in the outer case 10a. In order to prevent this, a heat radiation pipe 40 serving as a heat source is arranged inside the outer casing 10a as shown in FIG.

Note that the heat insulating member 10c is not limited to resin such as foamed polyurethane resin. For the heat insulating member 10c, any material having heat insulating properties such as a vacuum heat insulating material can be appropriately used.

As shown in FIG. 2, each door 20 includes a door outer plate 20a, a door inner plate 20b made of, for example, ABS resin, and a space between the door outer plate 20a and the door inner plate 20b. and a heat insulating member 20c such as rigid urethane foam to be filled. Further, in each door 20, a fitting groove 20d for fitting and fixing the mounting portion 33 of the magnet gasket 30 is also formed by recessing the door inner plate 20b.

The heat insulating member 20c is not limited to a resin such as polyurethane foam, like the heat insulating member 10c used for the heat insulating box 10. For example, a vacuum heat insulating material or the like may be used for the heat insulating member 20c.

As shown in FIG. 2, at the peripheral edge of each door 20 on the side of the storage room, the gap between the door 20 and the heat insulating box body 10 is sealed to prevent the leakage of cold air and the entry of heat from the outside air. A magnet gasket 30 is provided which is made by extruding a soft resin such as polyvinyl chloride.

The magnet gasket 30 is provided on a flexible magnet 31 , a magnet holding portion 32 , a mounting portion 33 , a connecting portion 34 connecting the magnet holding portion 32 and the mounting portion 33 , and the peripheral surface of the magnet 31 . and a heat insulating sheet 35.

The magnet holder 32 holds and incorporates the magnet 31 . This magnet holding portion 32 is different from the magnet holding portion 61 of Patent Document 1 described with reference to FIG. Specifically, the magnet holding portion 32 also covers the peripheral surface of the magnet 31 facing the open end surface 10A of the heat insulating box 10 when the door 20 is closed. That is, the magnet gasket 30 is configured such that the magnet 31 does not directly contact the opening end face 10A.

The mounting portion 33 engages with the fitting groove 20 d provided on the door 20 to fix the magnet gasket 30 to the door 20 . The connecting portion 34 has flexibility, and connects the magnet holding portion 32 and the mounting portion 33 in an expandable/contractible manner. The heat insulating sheet 35 is provided on a surface of the magnet 31 excluding at least "a surface that contacts the opening end surface 10A of the heat insulating box 10 via the magnet holding portion 32". The reason why the surface of the magnet 31 in contact with the opening end face 10A is excluded from the installation range of the heat insulating sheet 35 is that the magnetic force (adsorption force) acting between the magnet 31 and the opening end face 10A is reduced by the existence of the heat insulating sheet 35. This is to prevent it from decreasing. The heat insulating sheet 35 may be provided on a part of the surface of the magnet 31 contacting the open end surface 10A, as long as the necessary minimum airtightness and heat insulation of the door 20 can be secured.

The magnet holding portion 32, the mounting portion 33, and the connecting portion 34 are integrally formed by molding a soft resin such as polyvinyl chloride into a long cord shape. The magnet 31 is formed by mixing magnet powder and synthetic rubber, for example, and has flexibility.

Next, the structure of the magnet gasket 30 will be explained in more detail with reference to FIGS. 3 and 4. FIG. In the refrigerator 1 of the present embodiment, when the magnet 31 is held by the magnet holding portion 32, the heat insulating sheet 35 is provided with the inside end surface portion 31a (inside portion) of the magnet 31 and the door side flat portion 31b (door side portion). part).

The inside end face portion 31a is a part of the peripheral surface of the magnet 31 that is located inside in the width direction when the door 20 is closed. The door-side planar portion 31 b is a portion of the peripheral surface of the magnet 31 on the door 20 side.

A sheet material containing at least one of xerogel and aerogel can be used for the heat insulating sheet 35 . For example, the heat insulating sheet 35 may be a sheet material containing therein at least one of silica xerogel and silica aerogel in which nanofibers having a fiber diameter of 50 nm or less are dispersed. A sheet material supporting at least one of silica xerogel and silica aerogel has a low bulk density of 100 to 250 kg/m ³ . In addition, since the sheet material has fine pores smaller than the mean free path of air of 68 nm, it has a feature that heat conduction due to solid heat conduction and air convection is reduced. Therefore, the sheet material has a low thermal conductivity of 0.02 W/mK with a thickness of about 0.1 mm. In addition, even if the sheet material is subjected to a pressing force when closing the door 20, the heat insulation performance of the sheet material does not easily deteriorate.

By providing such a heat insulating sheet 35 between the magnet 31 and the magnet holding portion 32 and on the inside end surface portion 31a and the door side flat portion 31b of the magnet 31, the following effects can be obtained. . The heat from the radiating pipe 40 located outside the magnet gasket 30 in the width direction is transmitted to the magnet 31 via the outer case 10a of the heat insulating box body 10, and can be suppressed from being transferred to the inside of the refrigerator. Moreover, since the heat insulation sheet 35 has sufficient heat insulation performance even with a thickness of about 0.1 mm, it is not necessary to make the magnet 31 thinner by the thickness of the heat insulation sheet 35 . Therefore, it is possible to secure the adhesion of the heat insulating box 10 to the entire periphery of the outer case 10a without impairing the suction force to the heat insulating box 10. - 特許庁

The above configuration ensures the magnetic force (attractive force) acting between the magnet 31 and the opening end face 10A, and can maximize the heat insulation of the magnet 31 at the lowest cost. This will be described with reference to FIGS. 5A to 5C.

FIGS. 5A to 5C show the amount of heat entering from the outside of the refrigerator into the refrigerator through the periphery of the magnet gasket 30 during operation of the refrigerator when the heat insulating sheet 35 having a thickness of 0.1 mm is provided on each peripheral surface of the magnet 31. , shows the contents calculated by thermal fluid simulation. FIG. 5A is a diagram showing a model region on which thermal fluid simulation was performed. In the thermal fluid simulation, the amount of heat entering the dotted line portion (incoming heat amount calculation portion) C shown in FIG. 5A is calculated. FIG. 5B is an enlarged view of the magnet peripheral portion M of FIG. 5A. FIG. 5C is a table showing the results of calculation of the amount of heat entering the refrigerator under each condition. In FIG. 5C, when the amount of heat infiltration when there is no heat insulation sheet 35 around the magnet 31 is set to 100 (first line), how much heat is infiltrated when the heat insulation sheet 35 is provided on various peripheral surfaces. It shows what will happen.

When the heat insulating sheet 35 is provided on the entire peripheral surface of the magnet 31 (second row in FIG. 5C), the amount of heat entering the refrigerator is the smallest. However, in this case, a heat insulating sheet 35 with a thickness of 0.1 mm is provided on the surface that abuts against the opening end face 10A of the heat insulating box 10 via the magnet holding portion 32. As shown in FIG. Therefore, the space between the magnet 31 and the opening end face 10A is 0.1 mm, and the magnetic force (adsorption force) is reduced. In order to make up for this decrease in magnetic force with the thickness of the magnet, the thickness of the magnet 31 must be increased by 44%, and it is unrealistic to establish this configuration.

In addition, the heat insulating sheet 35 is provided on three surfaces (the inner side surface 31a, the outer side surface 31d, and the door side flat surface 31b) excluding the surface that contacts the opening end surface 10A of the heat insulating box 10 via the magnet holding portion 32. case (third line in FIG. 5C), and when the heat insulating sheet 35 is provided on two surfaces (inside side surface 31a, door side plane 31b) excluding the outside side surfaces 31c and 31d (fourth line in FIG. 5C, 31a and 31b), there is no difference in the amount of incoming heat. This is because the heat from the heat radiating pipe 40 is transferred to the magnet 31 via the outer case 10a of the heat insulating box body 10, and in order to suppress the heat transfer to the inside of the refrigerator, the heat insulating sheet 35 is placed around the magnet 31. It is shown that it is sufficient to provide them on the inner side surface of the chamber and the flat surface on the door side. In other words, it is most efficient to provide the heat insulating sheets 35 on the two surfaces, also for low cost production.

Note that when the insulating sheet is installed on one surface (the door-side flat surface 31b) (fifth line in FIG. 5C), the amount of heat entering the chamber is significantly different from when the insulating sheet 35 is not installed on the entire peripheral surface. Therefore, it does not provide a configuration that enhances heat insulation. Although illustration is omitted, the amount of heat entering the chamber when the heat insulating sheet 35 is installed only on the inner side surface 31a of the chamber is also greatly different from when the heat insulating sheet 35 is not installed on the entire peripheral surface. There is no

As the heat insulating sheet 35, an airgel layer in which airgel particles are further bonded with a rubber-based binder and coating layers are provided on both sides of the airgel layer can also be used. Such a heat insulating sheet has airgel particles bound by a rubber-based binder, so it has excellent flexibility and can be bent with a small radius of curvature. In addition, it is preferable to use silica airgel as the airgel in order to achieve low thermal conductivity. Also, increasing the amount of the rubber-based binder added can improve the flexibility of the heat insulating sheet 35, while the thermal conductivity of the heat insulating sheet 35 tends to increase. Therefore, it is preferable to reduce the amount of the rubber-based binder added as much as possible.

As a method for arranging the heat insulating sheet 35 between the magnet 31 and the magnet holding portion 32, as shown in FIG. can be manufactured to However, the present disclosure is not limited to this manufacturing method, and other known methods may be used.

[2. Action effect]
(1) According to the embodiment of the present disclosure, by providing the heat insulation sheet 35 on the peripheral surface of the magnet 31, the magnet holding portion 32 and the magnet gasket 30 do not need to be enlarged, and the magnet 31 to the magnet holding portion 32 can be Can suppress heat conduction. Therefore, the heat insulating property of the magnet gasket 30 can be improved, and heat can be prevented from entering the inside 10d.

(2) Since the heat insulating sheet 35 is provided on the inside end surface 31a and the door side flat portion 31b of the magnet 31, heat is efficiently transmitted from the outside of the refrigerator to the inside 10d through the magnet 31. can be suppressed.

(3) Since the heat insulation sheet 35 is not provided on the opening end face 10A side of the heat insulation box 10, the magnetic force acting on the opening end face 10A from the magnet 31 is not reduced. Therefore, the magnet gasket 30 can effectively attract the door 20 and the open end surface 10A of the heat insulation box 10. As shown in FIG.

(4) Since the heat insulating sheet 35 is made of a material containing xerogel or aerogel, the magnet holder can be made thinner than when an air layer is provided, and heat transfer to the interior of the refrigerator can be efficiently suppressed. .

[3. Modification]
(1) In the refrigerator 1 of the present embodiment, the heat insulating sheet 35 is arranged on the two surfaces of the magnet 31, that is, the door-side flat surface portion 31b and the inside end surface portion 31a, but the present disclosure is not limited to this. For example, the heat insulating sheet 35 may also be provided on the outer side surface 31d of the magnet 31, that is, on the outer side in the width direction when the door 20 is closed.

(2) FIG. 6 is a sectional view showing a modification of the magnet in refrigerator 1 according to the present embodiment. The magnet 311 of this modified example is used in place of the magnet 31 in the magnet gasket 30 shown in FIGS. The magnet 311 is formed by increasing the curvature radius of the heat insulating sheet 35 provided on the peripheral surface so that the heat insulating sheet 35 can be easily brought into close contact with the magnet 311 . Specifically, the magnet 311 is provided with a curved surface portion 311c between the door-side flat surface portion 311b and the inside end surface portion 311a. It has a structure in which the heat insulating sheet 35 is easily brought into close contact with.

By forming the curved surface portion 311c between the door-side flat portion 311b and the chamber-inside end surface portion 311a in this way, the heat insulating sheet 35 can be brought into close contact along the outer peripheral surface of the magnet 311, and the heat insulating performance of the heat insulating sheet 35 can be improved. can increase

In this case, the radius of curvature of the curved surface portion 311c may be appropriately set according to the thickness and flexibility of the heat insulating sheet 35 . In general, if the radius of curvature is approximately the same as the thickness of the heat insulating sheet 35, the heat insulating sheet 35 can be folded along the curved surface portion 311c. For example, if the insulating sheet has a structure in which silica airgel is evenly embedded in the voids of the fiber sheet, a thickness of 0.1 mm can be achieved. In the case of this thickness, the curvature radius of the curved surface portion 311c should be 0.1 mm or more. As the curved surface portion 311c, for example, a continuous curved surface portion may be formed from the center position of the door side flat surface portion 311b in the width direction (horizontal direction in FIG. 5) to the upper end portion of the inside end surface portion 311a.

When the insulation sheet 35 is also provided on the outer end surface portion 311d, a curved surface portion may be provided between the flat surface portion 311b on the door side and the outer end surface portion 311d.

INDUSTRIAL APPLICABILITY The present disclosure can contribute to energy saving by increasing the heat insulating performance between the heat insulating box body and the door, and can be applied to various fields of refrigerators that store refrigerated and frozen products.

1 Refrigerator (cooling device)
REFERENCE SIGNS LIST 10 heat insulation box 10A opening end face 10a outer box 10b inner box 10c heat insulation member 10d accommodation space 11 refrigerator compartment 12 second freezer compartment 13 ice making compartment 14 first freezer compartment 15 vegetable compartment 20 door 20a door outer plate 20b door inner plate 20c heat insulating member 20d fitting groove 21 refrigerating compartment right door 22 refrigerating compartment left door 23 second freezer compartment door 24 ice making compartment door 25 first freezer compartment door 26 vegetable compartment door 30 magnet gasket 31, 311 magnet 31a inner side surface 311a Inner end face (inside part)
31b Door-side plane 311b Door-side plane (door side)
31c outer side surface 311c curved surface portion 31d outer side surface 311d outer end surface portion 32 magnet holding portion 33 attachment portion 34 connection portion 35 heat insulating sheet 40 heat radiation pipe C heat intrusion calculation portion M magnet peripheral portion

Claims (4)

a heat insulating box having a storage space opening forward, surrounding the opening and having an open end face facing forward;
a door attached to the insulating box that allows the opening to be opened and closed;
a magnet gasket attached to the inner peripheral edge of the door facing the opening end face when the opening is closed,
The magnet gasket is
a magnet;
a magnet holder that holds the magnet;
a heat insulating sheet provided between the magnet and the magnet holding portion ;
In a state in which the door closes the opening, the magnet moves the door-side flat surface facing the door, the opening side surface facing the opening end surface, and the door-side flat surface and the opening side surface to the insulation box. Having an inner side surface that connects on the inner side in the width direction of the body,
The inner side surface of the storage is a curved surface that gradually changes inward in the width direction from the door side toward the opening side surface from the door side plane when the door closes the opening. and
The heat insulating sheet is a single sheet, is formed with a constant thickness, and is arranged so as to be in contact with the door-side flat surface and the inner side surface of the refrigerator.
Cooling system. The inner side surface of the storage has the maximum radius of curvature on the peripheral surface of the magnet,
A cooling device according to claim 1 . The heat insulating sheet is arranged to be bent over the door-side flat surface, the inner side surface of the refrigerator, and the outer side surface of the refrigerator when the door closes the opening. connecting the side plane and the opening side surface on the outside in the width direction;
A cooling device according to claim 1 . The heat insulating sheet is arranged to be bent over the door-side flat surface, the inner side surface of the refrigerator, the opening side surface, and the outer side surface of the refrigerator when the door closes the opening. connects the door-side flat surface and the opening side surface on the outside in the width direction,
A cooling device according to claim 1 .

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