JP2018044758A - Heat insulation box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a refrigerator that suppresses heat entering into a refrigerator from a heat radiation pipe for preventing dew condensation on a partition plate of a heat insulating box. A heat insulating box main body having a space, a door for sealing the space, and a partition plate for partitioning the space, the partition plate being a design plate arranged on the door side, and the design plate. A first plate part and a second plate part arranged at both ends of the design plate, a heat insulating material located in a region surrounded by the design plate, the first plate part and the second plate part, and the design plate, A heat insulation box including a heat insulator arranged between the first plate portion and at least one of the design plate and the second plate portion is used. [Selection diagram] Figure 2

Description

The present invention relates to a heat insulation box. In particular, the present invention relates to a structure of a partition part of a heat insulating box such as a refrigerator having a plurality of chambers.

A heat insulation box such as a refrigerator having a plurality of rooms is provided with a partition plate which is a resin molded product provided with a heat insulating material inside, and the rooms are partitioned into rooms with different environments such as temperature and humidity depending on the contents of storage such as food. Are divided.

  The strength of the heat insulation box is improved by installing this partition plate. The design plate on the opening side of the partition plate is formed in a U shape with a front design surface and an end bent at a right angle to the design surface.

  In addition, the design plate needs to be a magnetic body to which a magnet provided inside the packing is attached so that the packing provided on the door and the box body are held in a sealed state. Furthermore, since the design plate has a great influence on the strength improvement of the refrigerator, a low-priced and high-strength coated steel plate is used for the design plate.

  However, since the design plate is made of a coated steel plate having excellent thermal conductivity, heat flows from the outdoor high temperature region toward the indoor low temperature region. Thereby, while the heat insulation performance of a heat insulation box falls, the temperature of the design board itself falls below the dew point of external air (installation atmosphere of a refrigerator), and dew condensation arises.

  With respect to such a problem, Patent Document 1 takes measures to prevent the occurrence of condensation. FIG. 12 is a diagram showing a structure around a partition plate and a design plate of a conventional refrigerator in Patent Document 1. The partition plate 21 includes a heat insulating material 28, an upper plate 26, a lower plate 27, a heat radiating pipe 22, a heat storage layer 23, a design plate 25, an end portion 25 a of the design plate, and a heat insulating material 24.

  An upper plate 26 and a lower plate 27 are respectively disposed above and below a urethane foam heat insulating material 28 sealed from the rear portion of the refrigerator, and a heat radiating pipe 22 for radiating the refrigeration cycle is disposed on the front portion thereof. . The heat radiating pipe 22 is in contact with the design plate 25 through the heat storage layer 23. In order to prevent the urethane heat insulating material 28 from leaking to the front surface of the refrigerator, a solid flexible heat insulating material 24 made of foamed polystyrene or the like is provided. The heat insulating material 24 is pressed against the design plate 25 when encapsulating the urethane foam heat insulating material 28 from the back of the refrigerator. As a result, the temperature is raised above the dew point to prevent condensation.

  Patent Document 2 takes measures to increase the heat insulation of the refrigerator while preventing condensation and strengthening the partition plate.

  FIG. 13 is a diagram showing a structure around a partition plate and a design plate of a conventional refrigerator in Patent Document 2. In the partition plate 31, an upper plate 38 and a lower plate 39 are respectively arranged above and below a urethane foam heat insulating material 33 enclosed from the back side of the refrigerator. Further, between the upper plate 38 and the lower plate 39, a urethane foam heat insulating material 33 and a heat radiating pipe 32 are disposed. In addition to this, the solid flexible heat insulating material 34 made of foamed polystyrene or the like is separated to ensure the strength of the partition plate 31 and to prevent urethane from leaking to the front of the refrigerator when the foamed urethane heat insulating material 28 is sealed from the back of the refrigerator. A partition wall 36 is provided to prevent this.

  The heat radiating pipe 32 is in contact with the design plate 35. The design plate 35 does not directly contact the upper plate 38 and the lower plate 39 as in Patent Document 1, but the upper plate 38 via the overhanging end portion 35b so as to surround the hard heat insulating material 37. In contact with the lower plate 39. Further, the leg-shaped end 35c is also in contact with the rib portion 40 of the partition wall 36, so that the heat insulating property of the heat insulating box is provided by arranging the hard heat insulating material 37 while ensuring the strength of the partition plate 31 and preventing condensation. Is increasing.

JP-A-4-103984 Japanese Patent No. 2945553

  However, in the conventional refrigerator described in FIG. 12 of Patent Document 1, the penetration of heat into the refrigerator cabinet cannot be suppressed. The design plate 25 has end portions 25 a near the surfaces of the upper plate 26 and the lower plate 27 of the partition plate 21. As a result, the design plate 25 rises in temperature and dew condensation is prevented. However, the heat generated from the heat radiating pipe 22 is transmitted from the design plate 25 made of a steel plate having a high thermal conductivity to the end portion 25a, and the upper plate 26 and the lower plate 27 made of a resin having a high thermal conductivity. Through the route A in FIG. This causes the heat insulation performance of the heat insulation box to deteriorate.

  Further, the solid flexible heat insulating material 24 disposed in the vicinity of the heat radiating pipe 22 which is a heat source is made of polystyrene foam having a high thermal conductivity (approximately λ = 0.040 W / (m · K)), This is approximately twice the thermal conductivity (approximately λ = 0.024 W / (m · K)) of the urethane foam heat insulating material 28. This also reduces the heat insulation performance from the heat radiating pipe 22 to the end 25a of the design plate, the upper plate 26 and the lower plate 27 of the partition plate, and lowers the heat insulating performance of the heat insulating box.

  Further, even the conventional refrigerator described in FIG. 13 of Patent Document 2 cannot sufficiently suppress the intrusion of heat into the refrigerator cabinet. Since the design plate 35 is in contact with the upper plate 38 and the lower plate 39 through the overhang end portion 35b, the heat of the heat radiating pipe 32 is transferred from the front surface portion 35a through the overhang end portion 35b to the upper plate 38, It is transmitted to the lower plate 39 and enters the cabinet through the route B in FIG. Similarly, since the design plate 35 is in contact with the rib portion 40 of the partition wall through the leg-shaped end side 35c, the heat of the heat radiating pipe 32 is separated from the front surface portion 35a through the leg-shaped end side 35c. 13 is transmitted to the rib portion 40 and the partition wall 36, and enters the cabinet even in the route C in FIG. 13, which causes a decrease in the heat insulating performance of the refrigerator.

  Similarly to the case of Patent Document 1, the solid flexible heat insulating material 34 disposed in the vicinity of the heat radiating pipe 32 which is a heat source is made of polystyrene foam having a high thermal conductivity, and heat insulation of urethane foam. This is approximately twice the thermal conductivity of the material 33. This also lowers the heat insulation performance from the heat radiating pipe 32 to the leg-shaped edge 35c of the design plate and the partition wall 36 to the upper plate 38 and the lower plate 39 of the partition plate, thereby reducing the heat insulation performance of the heat insulation box.

  This invention solves the said conventional subject, and it aims at providing the heat insulation box which implement | achieved the prevention of dew condensation near a partition plate and suppressed the heat | fever which penetrate | invades into a refrigerator cabinet through a design board.

  In order to solve the above problems, a heat insulating box body having a space, a door for sealing the space, and a partition plate for partitioning the space, the partition plate is a design plate disposed on the door side, The first plate portion and the second plate portion disposed at both ends of the design plate, the heat insulating material located in the region surrounded by the design plate, the first plate portion, and the second plate portion, A heat insulating box including a heat insulator disposed between at least one of the design plate and the first plate portion and between the design plate and the second plate portion is used.

  According to the present invention, it is possible to prevent condensation in the vicinity of the partition plate, suppress heat entering the refrigerator cabinet through the design plate, and prevent urethane from leaking to the front of the refrigerator when encapsulating the urethane foam heat insulating material. Prevent and improve the thermal insulation performance of the refrigerator.

The figure which shows the structure of the heat insulation box of the refrigerator in Embodiment 1,2. 1 is a vertical cross-sectional view of the α part in FIG. 1 in the first embodiment. Diagram showing the cross-sectional structure of soft composite insulation (A) The figure which shows the structure before lamination | stacking of a soft composite heat insulating material, (b) The figure which shows the structure after lamination | stacking of a soft composite heat insulating material, (c) The figure which shows the structure after the gel hardening of a soft composite heat insulating material. The figure which shows the step which incorporates a design board between the upper board of the partition plate of the heat insulation box of the refrigerator in Embodiment 1, 2, 4, and a lower board. The figure which shows the screwing mechanism of the partition plate of the heat insulation box of the refrigerator in Embodiment 1, 2, 3, 4. Graph showing thermal conductivity change when pressing soft composite insulation and other insulation FIG. 1 is a longitudinal sectional view of the α part in FIG. FIG. 1 is a longitudinal sectional view of the part α in FIG. (A) The figure which shows the middle stage which puts the design board in Embodiment 3 in a partition plate, (b) The figure which shows after putting the design board in Embodiment 3 in a partition plate FIG. 1 is a longitudinal sectional view of the part α in FIG. Sectional drawing which shows the structure of the partition plate of the heat insulation box of the conventional refrigerator in patent document 1 Sectional drawing which shows the structure of the partition plate of the heat insulation box of the conventional refrigerator in patent document 2

Hereinafter, embodiments will be described with reference to the drawings.

(Embodiment 1)
1 is a perspective view showing a heat insulating box of a refrigerator according to Embodiment 1 of the present invention, FIG. 2 is a longitudinal sectional view of a part α in FIG. 1, and FIG. FIG.

<Configuration of heat insulation box 100>
In FIG. 1, a heat insulating box 100 of a refrigerator includes an outer box 5 made of metal such as a steel plate, an inner box 4 made of resin such as ABS (acrylonitrile butadiene styrene), and a space to be insulated in the inner box 4. It is comprised by the partition plate 1 which partitions off, and the door (not shown) which seals space. The outer box 5 and the inner box 4 are combined to form a heat insulating box body.

  The partition plate 1 divides the heat-insulated space into a first storage chamber 2 and a second storage chamber 3. For example, the 1st store room 2 is a refrigerator compartment, and the 2nd store room 3 is a freezer room. The partition plate 1 is arrange | positioned between each storage room from which a temperature zone differs.

<Configuration of partition plate 1>
In FIG. 2, the partition plate 1 has an upper plate 6 (first plate portion) and a lower plate 7 (second plate portion) on the upper and lower sides, and front portions of the upper plate 6 and the lower plate 7 (the front surface of the heat insulating box, the door). On the side), there is a U-shaped design board 10. On the design plate 15, a heat radiating pipe 9 (heat radiating portion) for preventing condensation is placed in contact. In addition, you may prevent dew condensation by another method instead of the heat radiating pipe 9. Further, the heat radiating pipe 9 may not be in the partition plate 1.

  The design plate 10 has a front surface portion 10a that appears on the front surface of the refrigerator, and a side surface portion 10b that is bent about 90 degrees from the front surface portion 10a and is arranged inside the refrigerator.

  A soft composite heat insulating material 11 (heat insulator) is sandwiched between the side surface portion 10b of the design plate 10, the upper plate 6 (first plate portion), and the lower plate 7 (second plate portion), and is compressed and fixed. The 1st board part 6, the heat insulator 11, and the side part 10b of the design board 10 are laminated | stacked. The heat insulator 11 is easily compressed.

  The upper plate 6 (first plate portion) and the lower plate 7 (second plate portion) are L-shaped, and are provided with an upper plate front surface portion 6a and a lower plate front surface portion 7a, respectively, on the front surface portion thereof. . In order to prevent heat conduction from the design plate 10 to the upper plate 6 (first plate portion) and the lower plate 7 (second plate portion), as shown in the dotted line in FIG. It is preferable to connect the upper plate 6 (first plate portion) and the lower plate 7 (second plate portion) only through the soft composite heat insulating material 11 (heat insulator). That is, it is preferable to leave a gap 50 so that the design plate 10 and the upper plate front surface portion 6a and the lower plate front surface portion 7a do not directly contact each other. The gap 50 is thinner than the thickness of the heat insulator 11.

  In addition, since the whole surface part of the upper board 6 (1st board part) and the lower board 7 (2nd board part) has a key bracket type upper board front part 6a and the lower board front part 7a, from the refrigerator front The soft composite heat insulating material 11 (heat insulator) is not clearly visible to the user. As a result, the beauty as a refrigerator can also be maintained. Further, urethane foam is interposed between the upper plate 6 (first plate portion) and the soft composite heat insulating material 11 (heat insulator), the heat radiating pipe 9 (heat radiating portion), the design plate 10 and the lower plate 7 (second plate portion). The heat insulating material 8 is filled.

  As a result, the 1st board part 6, the heat insulator 11, the side part 10b of the design board 10, and the heat radiating pipe 9 are laminated | stacked, or exist on a straight line. The heat insulator 11 can block the heat path.

<Configuration of soft composite heat insulating material 11 (heat insulating material)>
A soft composite heat insulating material 11 (heat insulator) shown in FIG. 3 is a composite of an airgel and a fiber structure. The soft composite heat insulating material 11 (heat insulator) includes the nonwoven fabric fiber 11c and the airgel 11d as constituent elements. The soft composite heat insulating material 11 has a laminated structure having a composite layer 11a of airgel and fiber in the center and a single fiber layer 11b above and below the composite layer 11a. In the soft composite heat insulating material 11, the airgel fiber composite layer 11a is not easily deformed, but the fiber single layer 11b can be deformed and is flexible.

  The airgel fiber composite layer 11a is obtained by combining an airgel with a fiber structure (for example, non-woven fabric), and the fiber structure is immersed in an airgel precursor, and is supercritically dried in the presence of the fiber structure or at atmospheric pressure. It is obtained by producing an airgel from the airgel precursor by drying.

  The airgel is a solid having an extremely high porosity (preferably a porosity of 99% or more) having many fine pores. More specifically, it is a substance having a structure in which silicon dioxide or the like is bonded in a bead shape and having many nanometer-level (for example, 2 to 50 nm) voids. Since it has nanometer-level pores and a lattice structure, it can reduce the mean free path of gas molecules, and there is very little heat conduction between gas molecules even at normal pressure, and the heat conductivity is very small. Is.

  The airgel is preferably an inorganic airgel made of a metal oxide such as silicon, aluminum, iron, copper, zirconium, hafnium, magnesium or yttrium, more preferably a silica airgel made of silicon dioxide.

  The fiber structure functions as a reinforcing material or support for reinforcing and supporting the airgel, and a soft woven fabric, a knitted fabric, a non-woven fabric, or the like is used to obtain a soft composite heat insulating material. . As a material of the fiber structure, inorganic fibers such as glass fibers can be used in addition to organic fibers such as polyester fibers.

  The heat insulating material thus obtained has a thermal conductivity equal to or lower than that of the urethane foam heat insulating material (approximately λ = 0.020 W / (m · K)), and is a material having a very high heat insulating property.

  The fiber single layer 11b consists of the said fiber structure which does not contain an airgel. It is preferable that the fiber single layer 11b mainly consists only of a fiber material. The fiber single layer 11b is designed by the creation of elasticity at the time of compression of the soft composite heat insulating material 11 (heat insulator) and the warp and undulation of the upper plate 6 (first plate portion) and the lower plate 7 (second plate portion). It is provided as a resilient layer for alleviating variation in the gap with the plate 10.

  In addition, the fiber single layer 11b of both sides contacts the upper board 6 and the design board 10, respectively. The fiber single layer 11b is compressed from both plates. The fiber single layer 11b is mainly compressed. However, since the thermal conductivity contributes greatly to the airgel fiber composite layer 11a, the thermal conductivity of the heat insulator 11 hardly changes even when compressed, and heat insulation can be maintained.

  The layer direction of the fiber single layer 11b and the airgel fiber composite layer 11a is the same as the direction of compression.

(Production method)
About the refrigerator comprised as mentioned above, the manufacturing method and effect are demonstrated below.

<Manufacture of soft composite heat insulating material 11 (heat insulating material)>
The manufacturing method of the soft composite heat insulating material 11 (heat insulator) is (1) sol preparation step, (2) impregnation step, (3) lamination step, (4) gelation step, (5) curing step, (6) acidic aqueous solution It consists of 8 steps of dipping step, (7) hydrophobizing step, and (8) drying step. Each step will be described below.

(1) Sol preparation process In the sol preparation process, there are a case where water glass is used as a raw material and a case where a high molar silicic acid aqueous solution is used. When water glass is used, sodium in the water glass is removed by an ion exchange resin or electrodialysis and acidified to form a sol, which is then polycondensed by adding a base as a catalyst to obtain a hydrogel. When high molar sodium silicate is used, an acid is added to the high molar aqueous silicic acid solution as a catalyst and polycondensed to obtain a hydrogel.

(2) Impregnation step The sol solution prepared in (1) is poured into the nonwoven fabric composed of PET, glass wool, rock wool, etc. having a thickness of 0.2 to 1.0 mm in an amount of 6.5 to 10 times the weight of the nonwoven fabric. Then, the nonwoven fabric is impregnated with the sol solution. In the impregnation method, the sol solution is spread on the film or the like with a certain thickness in advance, and the nonwoven fabric is covered with the sol solution so that the sol solution penetrates the nonwoven fabric.

(3) Lamination process A lamination structure is demonstrated using Fig.4 (a)-FIG.4 (c). By the process (2), the airgel fiber composite layer 11a in FIG. In the laminating step, a non-woven fabric is laminated and combined as the fiber single layer 11b.

  First, as shown in FIG. 4 (a), the airgel fiber composite layer 11a that has undergone the impregnation step of (2) is sandwiched as shown in FIG. . At this time, due to the osmotic pressure, a part of the sol component in the airgel fiber composite layer 11a penetrates (impregnates) into the nonwoven fabric which is the fiber single layer 11b.

(4) Gelation step After (3), the sol is gelled. The gelation temperature of the sol is preferably 20 to 90 ° C. When the gelation temperature is less than 20 ° C., heat necessary for the silicic acid monomer which is an active species of the reaction is not transmitted. For this reason, the growth of silica particles is not promoted. As a result, it takes time until the sol is sufficiently gelled. In addition, the strength of the generated gel (aerogel) is low, and it may shrink greatly during drying, and an airgel having a desired strength may not be obtained.

  On the other hand, when the gelation temperature exceeds 90 ° C., the growth of silica particles is remarkably promoted. As a result, water volatilization occurs rapidly, and water and hydrogel are separated. The volume of the hydrogel obtained by this decreases, and a silica airgel may not be obtained.

  The gelation time varies depending on the gelation temperature and the curing time after gelation described later, but is preferably 0.1 to 12 hours by adding the gelation time and the curing time described later. Further, the gelation time is preferably 0.1 to 1 hour from the viewpoint of achieving both performance (thermal conductivity) and production tact.

  When the gelation time is longer than 12 hours, the silica network is sufficiently strengthened. However, the longer the curing time, not only the productivity is lost, but also the gel shrinks. As a result, since the bulk density of the gel is increased, the thermal conductivity of the resulting soft composite heat insulating material 11 (heat insulator) is not good.

  In this way, by performing gelation, the strength and rigidity of the hydrogel wall are improved, and a hydrogel that does not easily shrink during drying can be obtained. Furthermore, as the sol is solidified in a gel state, the airgel soaked into the nonwoven fabric layer is solidified, and as shown in FIG. 4C, all layers are combined to form a laminate of the airgel fiber composite layer 11a and the fiber single layer 11b. Form a structure.

(5) Curing Process The curing process is a process in which the skeleton of silica is reinforced into a reinforced skeleton hydrogel after gelation. The curing temperature is preferably 50 to 100 ° C. When the curing temperature is less than 50 ° C., the dehydration condensation reaction is relatively slow, so that it is difficult to sufficiently strengthen the silica network within the target tact time when considering productivity.

  When the curing temperature is higher than 100 ° C., the water in the gel evaporates remarkably, so that the gel shrinks and dries, and the thermal conductivity increases.

  The curing time is preferably 0.1 to 12 hours, and more preferably 0.1 to 1 hour from the viewpoint of achieving both performance (thermal conductivity) and production tact.

  When the curing time is longer than 12 hours, the silica network is sufficiently strengthened. However, if the curing time is longer, not only the productivity is impaired, but also the gel shrinks and the bulk density increases. There is a problem that conductivity increases.

  By performing the curing in the range of 0.1 to 6 hours, it is possible to sufficiently strengthen the silica particle network while ensuring productivity.

(6) Acidic aqueous solution immersion step After the gel-nonwoven fabric complex is immersed in hydrochloric acid (6-12N), it is allowed to stand at room temperature for 23 minutes or longer to incorporate hydrochloric acid into the complex.

(7) Hydrophobization process For example, the composite of gel and non-woven fabric is immersed in a mixed solution of octamethyltrisiloxane, which is a silylating agent, and 2-propanol (IPA) as an alcohol, and placed in a constant temperature bath at 55 ° C. Let react for hours. When trimethylsiloxane bond starts to be formed, hydrochloric acid water is discharged from the gel sheet and separated into two liquids (siloxane in the upper layer and hydrochloric acid in the lower layer).

(8) Drying The gel / nonwoven fabric composite is transferred to a thermostat at 150 ° C. and dried for 2 hours (in the case of normal pressure drying).

  The soft composite heat insulating material 11 (heat insulator) is manufactured by the above process.

<Manufacture of partition plate 1>
The manufacturing method of the partition plate 1 is demonstrated using FIG.1, FIG.2, FIG.5 and FIG.

  In FIG. 1, after engaging the outer box 5 and the inner box 4, the part of the partition plate 1 in FIG. 1, as shown in FIG. 5, the heat radiating pipe 9 (heat radiating part) so as to contact the design plate 10. Is fixed to the lower surface of the upper plate 6 (first plate portion) of the partition plate 1 and the upper surface of the lower plate 7 (second plate portion) with tape or the like (not shown). The soft composite heat insulating material 11 (heat insulator) is installed.

  Next, the upper plate 6 (first plate portion) and the lower plate 7 (second plate portion) of the partition plate 1 temporarily fixed to the heat insulation box are slightly expanded up and down as shown in FIG. As shown in (2), the design plate 10 is moved between the soft composite heat insulating material 11 (heat insulator) installed on the upper plate 6 (first plate portion) and the lower plate 7 (second plate portion). Combine.

  As shown in the perspective view of FIG. 6, the upper plate 6 (first plate portion) (not shown) and the lower plate 7 (second plate portion) (not shown) are fixed to fix the position of the combined design plate 10. A screw (not shown) is attached to the mounting rib 12 of the partition plate 1 disposed at a part of the partition plate via a screw hole 13 on the design plate 10 disposed at the same position as the mounting rib 12. Then, the design plate 10 is fixed.

  Finally, foaming is performed between the outer box 5 and the inner box 4 from the back side of the heat insulating box 100 in FIG. 1, and between the upper plate 6 (first plate portion) and the lower plate 7 (second plate portion) in FIG. The partition plate 1 and the heat insulation box 100 are manufactured by pouring and curing the urethane heat insulating material 8.

  At this time, as shown in FIG. 2, the soft composite heat insulating material 11 (heat insulator) is compressed between the upper plate 6 (first plate portion) and the lower plate 7 (second plate portion) by the design plate 10. Since it is fixed, the heat insulating material 8 of urethane foam does not leak out to the front surface of the heat insulating box at the time of sealing.

  As a result, the heat insulating material 8 is surrounded by the heat insulating body 11, the design plate 10, the first plate portion 6, and the second plate portion 7.

<Effect of Embodiment 1>
As shown in FIG. 2, the heat of the heat radiating pipe 19 is transmitted from the front surface portion 10 a to the side surface portion 10 b of the design plate 10, and is effective in preventing condensation on the surface of the design plate 10. On the other hand, since the soft composite heat insulating material 11 (heat insulator) having high heat insulation is disposed next to the side surface portion 10b, heat is applied to the upper plate 6 (first plate portion) and the lower plate 7 of the partition plate 1. Intrusion of heat into the cabinet can be prevented regardless of (second plate portion).

  In particular, even when the soft composite heat insulating material 11 (heat insulating material) receives a compressive force (pressing force) and contracts, the thermal conductivity hardly changes.

  FIG. 7 shows the relationship between the pressure of the soft composite heat insulating material 11 (heat insulator) and the thermal conductivity. The soft composite heat insulating material 11 (heat insulating body) in the first embodiment, the heat insulating material made of foam resin having the same thickness as Comparative Example 1, and the resin heat insulating material having the same thickness as Comparative Example 2 were evaluated. The thermal conductivity of each sample was measured under various pressures.

  The heat insulating material made of foamed resin (Comparative Example 1) rises by 76% when a pressure of 500 kPa is applied to the initial thermal conductivity λ = 0.04 W / (m · K).

The heat insulating material made of resin (Comparative Example 2) rises by 45% when a pressure of 500 kPa is applied against the initial thermal conductivity λ = 0.05 W / (m · K).
On the other hand, the thermal conductivity of the soft composite heat insulating material 11 (Example) increases only by 15% when pressed at 500 kPa.

  Therefore, the soft composite heat insulating material 11 (heat insulator) is suitable for compression and fixing between the design plate 10 and the upper plate 6 (first plate portion) and the lower plate 7 (second plate portion). That is, even if the soft composite heat insulating material 11 (heat insulator) is compressed, the heat insulating effect does not decrease. The soft composite heat insulating material 11 (heat insulating material) is preferable as a heat insulating material.

  In addition, the soft composite heat insulating material 11 (heat insulator) is compressed and fixed between the design plate 10 and the upper plate 6 (first plate portion) and the lower plate 7 (second plate portion), as shown in FIG. As shown in (c), an elastic fiber single layer 11b corresponding to the variation in the gap between the upper plate 6 (first plate portion), the lower plate 7 (second plate portion) and the design plate 10 is provided. Yes.

  Thereby, the heat insulating material 34 (FIG. 13), the heat insulating material 24 (FIG. 12), the partition wall 36 (FIG. 13) made from the low thermal insulation used in the conventional refrigerator for preventing leakage of the heat insulating material 8 of urethane foam. 13) may not be used.

  Furthermore, in the partition plate 1 according to the first embodiment, the heat insulating material 8 made of urethane foam having high heat insulating properties can be sealed up to the vicinity of the heat radiating pipe 19. Therefore, the heat | fever which penetrate | invades in the store | warehouse | chamber via the upper board 6 (1st board part) and the lower board 7 (2nd board part) from the thermal radiation pipe 19 can also be prevented.

  Further, as shown in FIG. 2, since the entire surface of the upper plate 6 (first plate portion) and the lower plate 7 (second plate portion) of the partition plate 1 has a key bracket shape, the soft composite heat insulation from the front of the refrigerator. The material 11 (heat insulator) is not visible to the user, and the beauty as a refrigerator can be maintained.

  In addition, although the soft composite heat insulating material 11 (heat insulating body) is provided in two places, it should just exist in at least one side.

(Embodiment 2)
FIG. 8 is a longitudinal sectional view of the part α in FIG. FIG. 8 is a diagram corresponding to FIG. 2 of the first embodiment.

  The second embodiment differs from the first embodiment in the shapes of the design plate 15, the upper plate 61 (first plate portion), and the lower plate 71 in FIG. Matters not described are the same as those in the first embodiment.

<Configuration of Design Plate 15, Upper Plate 61 (First Plate Portion), Lower Plate 71 (Second Plate Portion)>
In FIG. 8, the design plate 15 is formed by forming a double bent portion 15b at the end by bending such as roll forming, and then an upper plate 61 (first plate portion) and a lower plate 71 (second plate). Are bent again so as to form a plane parallel to the part), and a bent flat part 15c is provided.

  In other words, the design plate 15 has a double structure at both ends, and has a protrusion on the inside, and the heat insulating material is held by the protrusion.

  The upper plate 61 (first plate portion) and the lower plate 71 (second plate portion) are provided with counterbore 61b and 71b (concave portions) in parallel with the design plate 10 so that the soft composite heat insulating material 11 (heat insulator) is accommodated. Provided.

  In addition, you may fix a heat insulator with two convex parts instead of counterbore (concave part).

  In order to prevent heat conduction from the design plate 15 to the upper plate 61 (first plate portion) and the lower plate 71 (second plate portion), the design plate 15 and the upper plate 61 (first plate portion), the lower plate. 71 (second plate portion) is connected only via the soft composite heat insulating material 11 (heat insulator), and directly the end 15a of the design plate 15, the upper plate 61 (first plate portion), the lower plate 71 ( It is preferable to leave a gap so that the second plate portions do not contact each other.

<Effect of Embodiment 2>
In addition to the effects shown in the first embodiment (condensation prevention effect, effect of suppressing heat intrusion into the cabinet), counterbore 61b and 71b are provided on the upper plate 61 (first plate portion) and the lower plate 71 (second plate portion). The presence of the bent portion in the design plate 15 can improve the positioning accuracy when the partition plate 1 of the soft composite heat insulating material 11 (heat insulator) is assembled.

  Further, as shown in FIG. 8, since the design plate 15 has a bent portion, the soft composite heat insulating material 11 (heat insulator) is not visible to the user from the front of the refrigerator, and the beauty as a refrigerator can be maintained.

(Embodiment 3)
FIG. 9 is a longitudinal sectional view of a part α in FIG. FIG. 9 is a diagram corresponding to FIG. 2 of the first embodiment.

  The third embodiment differs from the first embodiment in the shape of the design plate 16, the upper plate 62 (first plate portion), the lower plate 72 (second plate portion), and the manufacturing method (design) of the partition plate 1. This is a method of assembling the upper plate 62 (first plate portion) and the lower plate 72 (second plate portion) of the plate 16. Matters not described are the same as those in the first embodiment.

<Configuration of Design Plate 16, Upper Plate 62 (First Plate Portion), Lower Plate 72 (Second Plate Portion)>
In FIG. 9, the design plate 16 has a first step portion 16a and a second step portion 16b formed by two-step pressing or the like. On the front surfaces of the upper plate 62 (first plate portion) and the lower plate 72 (second plate portion), wrinkle return portions 62a and 72a are provided, respectively.

  In order to prevent heat conduction from the design plate 16 to the upper plate 62 (first plate portion) and the lower plate 72 (second plate portion), the design plate 16 and the upper plate 62 (first plate portion), the lower plate. 72 (second plate portion) is connected only through the soft composite heat insulating material 11 (heat insulator), and directly the first step portion 16a of the design plate 16, the upper plate wrinkle return portion 62a, and the lower plate wrinkle return portion. It is preferable to leave a gap so that 72a does not contact each other.

<Manufacture of Partition Plate 1 (Assembly Method on Upper Plate 62 (First Plate Portion) and Lower Plate 72 (Second Plate Portion)) of Design Plate 16>
FIG. 10A is a diagram showing an assembling stage into the design plate 16 between the upper plate 62 (first plate portion) and the lower plate 72 (second plate portion) of the partition plate 1. When the design plate 16 is pushed between the upper plate 62 (first plate portion) and the lower plate 72 (second plate portion) in the direction of the arrow, the upper and lower surfaces of the second step portion 16b of the design plate 16 are the upper plate 62. The first plate portion and the lower plate 72 (second plate portion) are pressed against the tapered portions 62a and 72a of the upper plate 62 (first plate portion) and the lower plate 72 (second plate portion). The opening widens. Thereby, the design board 16 can be arrange | positioned even to the part between the soft composite heat insulating materials 11 (heat insulator) installed in the upper board 62 (1st board part) and the lower board 72 (2nd board part). .

  FIG. 10B is a diagram illustrating the state after the assembly into the design plate 16 between the upper plate 62 (first plate portion) and the lower plate 72 (second plate portion) of the partition plate 1. When the second step portion 16b (stepped shape) of the design plate 16 is pushed deeper than the back return portions 62a and 72a of the upper plate 62 (first plate portion) and the lower plate 72 (second plate portion), The external force with respect to the return parts 62a and 72a is lost. At this time, the soft composite heat insulating material 11 (heat insulator) and the second stepped portion 16b of the design plate 16 come into contact with each other and are compressed and fixed by the springback. In manufacturing the partition plate 1, the other parts are the same as those in the first and second embodiments.

<Effect of Embodiment 3>
According to the third embodiment shown in FIG. 9, in addition to the effects shown in the first embodiment (condensation prevention effect, effect of suppressing heat penetration into the cabinet), the upper plate 62 (first plate portion), the lower plate 72 ( Second plate portion) By having the hook return portions 62a and 72a on the front surface portion, the manufacturing process of the partition plate 1, particularly the upper plate 62 (first plate portion) and the lower plate 72 (second plate portion) of the design plate 16 Integration between the two can be simplified. That is, in Embodiment 1 or 2, it is necessary to widen the openings of the upper plate and the lower plate in order to incorporate the design plate, but in this embodiment, the design plate 16 is used as the upper plate as described above. It is only necessary to push in between 62 (first plate portion) and the lower plate 72 (second plate portion).

  Further, as shown in FIG. 9, the soft composite heat insulating material 11 from the front of the refrigerator is provided by the presence of the hook return portions 62 a and 72 a on the front surface of the upper plate 62 (first plate portion) and the lower plate 72 (second plate portion). The (insulator) is not visible to the user, and the beauty as a refrigerator can be maintained.

(Embodiment 4)
FIG. 11 is a longitudinal sectional view of a part α in FIG. FIG. 9 is a diagram corresponding to FIG. 2 of the first embodiment.

  The present embodiment differs from the first embodiment in the shapes of the upper plate 63 (first plate portion) and the lower plate 73 (second plate portion) in FIG. The side surface portion 10b of the upper plate 63 (first plate portion) and the lower plate 73 (second plate portion) has a flat shape on the front surface (position where the design plate 10 is assembled). Matters not described are the same as those in the first embodiment.

<Effect of Embodiment 4>
In addition to the effects shown in the first embodiment (an anti-condensation effect and an effect of suppressing heat penetration into the cabinet), an upper plate 63 (first plate portion) and a lower plate 73 (second plate) can be configured with a flat plate as a base. Part) can be easily produced.

  Even in a simple manufacturing method, the soft composite heat insulating material 11 (heat insulator) is firmly compressed and fixed between the upper plate 63 (first plate portion), the lower plate 73 (second plate portion) and the design plate 10. Therefore, the urethane inside does not leak out.

  Although it is difficult to ensure aesthetics, it can be applied to refrigerators that do not place aesthetic importance, such as commercial refrigerators for commercial use and commercial refrigerators.

(as a whole)
The above embodiments can be combined.

  Moreover, although it was an example which makes the both ends of the design board 10 the same shape in the above, it is good also considering either one as embodiment. Alternatively, different embodiments may be used at both ends.

  As described above, the refrigerator according to the present invention is for improving the heat insulation properties of all cooling / heating devices (commercial refrigerators, commercial refrigerators, wine cellars, etc.) having a mechanism that divides a room in a plurality of temperature zones with partition plates. Is available.

DESCRIPTION OF SYMBOLS 1 Partition plate 2 1st storage chamber 3 2nd storage chamber 4 Inner box 5 Outer box 6 Upper board (1st board part)
6a Upper plate front portion 7 Lower plate (second plate portion)
7a Lower plate front part 8 Heat insulation material 9 Heat radiation pipe (heat radiation part)
DESCRIPTION OF SYMBOLS 10 Design board 10a Front part 10b Side part 11 Soft composite heat insulating material (heat insulator)
11a aerogel fiber composite layer 11b single fiber layer 11c non-woven fiber 11d airgel 12 mounting rib 13 screw hole 15 design plate 15a end 15b double bent portion 15c bent flat portion 16 design plate 16a first step portion 16b second step Part 19 Radiation pipe 21 Partition plate 22 Radiation pipe 23 Heat storage layer 24 Heat insulation material 25 Design plate 25a End part 26 Upper plate 27 Lower plate 28 Heat insulation material 31 Partition plate 32 Heat radiation pipe 33 Heat insulation material 34 Heat insulation material 35 Design plate 35a Front part 35b Overhang end portion 35c Leg-shaped end side 36 Partition wall 37 Heat insulating material 38 Upper plate 39 Lower plate 40 Rib portion 50 Clearance 61 Upper plate (first plate portion)
61b Counterbore 62 Upper plate (first plate part)
62a 鉤 Return part 63 Upper plate (first plate part)
71 Lower plate (second plate)
72 Lower plate (second plate part)
72a 鉤 Return part 73 Lower plate (second plate part)
99 Porosity 100 Insulation box

Claims (14)

An insulated box body having a space;
A door that seals the space;
A partition plate for partitioning the space,
The partition plate is
A design board arranged on the door side;
A first plate portion and a second plate portion arranged at both ends of the design plate,
A heat insulating material located in a region surrounded by the design plate, the first plate portion, and the second plate portion;
A heat insulating box including a heat insulator disposed between at least one of the design plate and the first plate portion and between the design plate and the second plate portion. The heat insulation box according to claim 1, wherein the partition plate further includes a heat radiating portion disposed in contact with the design plate. The heat insulation box according to claim 1 or 2, wherein the heat insulator is in a compressed state. The heat insulation box according to any one of claims 1 to 3, wherein there is a gap between the design plate and the first plate portion or the second plate portion, and there is no contact. The heat insulation box according to claim 4 with which said design board and said 1st board part or said 2nd board part contact only via said heat insulating material. The said heat insulating material is a heat insulation box of any one of Claims 1-5 enclosed with the said heat insulating body, the said design board, the 1st board part, and the 2nd board part. The heat insulation box of any one of Claims 1-6 on which the said 1st board part, the said heat insulator, and the said design board are laminated | stacked. The heat insulation box of any one of Claims 1-7 on which the said 1st board part, the said heat insulating body, the said design board, and the said thermal radiation part are laminated | stacked. The said clearance gap is a heat insulation box of any one of Claims 4-8 smaller than the thickness of the said heat insulating body. The said heat insulation body is a heat insulation box of any one of Claims 1-9 containing a fiber layer and the composite layer of a fiber and a heat insulation material. The design board has a U-shape,
The heat insulation box according to any one of claims 1 to 10, wherein the first plate portion or the second plate portion is L-shaped. The heat insulation box according to any one of claims 1 to 10, wherein either the first plate portion or the second plate portion has a concave portion or a convex portion in which the heat insulating material is disposed. 11. The heat insulating box according to claim 1, wherein one end of the design plate has a double structure, a protrusion is provided inside, and the heat insulating material is held by the protrusion. The heat insulating box according to claim 1, wherein one end of the design plate is stepped.

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