JP4797387B2 - Insulator and refrigeration / refrigeration equipment or refrigeration equipment - Google Patents

Description

  The present invention relates to a heat insulator that can be used as a heat insulator such as a refrigerator, a heat insulating container, a vending machine, an electric water heater, an automobile, a railway vehicle, and a house.

  In recent years, energy saving is strongly desired from the viewpoint of preventing global warming, and energy saving is an urgent issue for household appliances. In particular, a heat insulating material having excellent heat insulating performance is required from the viewpoint of efficiently using heat in a heat and cold insulation device such as a refrigerator, a freezer, and a vending machine.

  As general heat insulating materials, fiber materials such as glass wool and foams such as urethane foam are used. However, in order to improve the heat insulation performance of these heat insulating materials, it is necessary to increase the thickness of the heat insulating material, and there is a limit to the space that can be filled with the heat insulating material, so when space saving and effective use of the space are necessary It cannot be applied.

  Therefore, a vacuum heat insulator has been proposed as a high performance heat insulating material. This is a heat insulator in which a core material serving as a spacer is inserted into a jacket material having a gas barrier property and the inside is sealed under reduced pressure.

  By increasing the degree of vacuum inside the vacuum heat insulating body, high performance heat insulating performance can be obtained, but the gas existing inside the vacuum heat insulating body is roughly divided into the following three types. One is the gas that cannot be evacuated when the vacuum heat insulator is manufactured, and the other is the gas generated from the core material and the jacket material after being vacuum-sealed (adsorbed to the core material and the jacket material). The remaining gas is a gas that passes through the jacket material and enters from the outside.

  In order to adsorb these gases, a method of filling a vacuum heat insulating material with an adsorbent has been devised.

  For example, there exists what adsorb | sucks the carbon dioxide and water | moisture content in a vacuum heat insulating body with the silica alumina etc. which are general purpose adsorption materials (for example, refer patent document 1).

  Moreover, there exists what adsorb | sucks the gas in a vacuum heat insulating body using Ba-Li alloy (for example, refer patent document 2).

By the way, one of the gases that are difficult to adsorb among the gases to be adsorbed by the adsorbent in the vacuum insulator is nitrogen. This is because the nitrogen molecule is a nonpolar molecule having a large binding energy of about 940 kJ / mol, and thus it is difficult to activate. However, nitrogen can be adsorbed by the Ba-Li alloy, and the degree of vacuum inside the vacuum heat insulator is maintained.
JP-A-61-103090 Japanese National Patent Publication No. 9-512088

  However, in the conventional configuration described in Patent Document 1, a gas having low activity such as nitrogen cannot be adsorbed.

  Further, in the conventional configuration described in Patent Document 2, it is possible to adsorb nitrogen at room temperature without requiring a heat treatment for activation, and further enhancement of activation and increase in capacity for nitrogen adsorption are desired. Ba is a deleterious substance-designated substance, and therefore, it is desired that it has no problem with respect to the environment and the human body for industrial use.

  This invention solves the said conventional subject, and it aims at providing the heat insulating body with favorable heat insulation performance by obtaining the adsorbent which can adsorb | suck the gas with low activity, such as nitrogen.

  Furthermore, it aims at providing what does not have a problem with respect to an environment or a human body.

In order to achieve the above object, the heat insulator of the present invention includes at least an adsorbent capable of adsorbing a gas and a gas barrier outer covering material covering the adsorbent, and the adsorbent includes at least Li, and a transition metal not to make Li intermetallic compound is a gas adsorption alloy formed by mixing by mechanical alloying, and the enthalpy of mixing of the two metals is rather greater than 0, between the two metal It is characterized in that at least a part is compatible .

  Thereby, the activity of Li capable of adsorbing nitrogen can be improved. Therefore, it is possible to obtain an alloy having a very high gas adsorption activity for nitrogen, which is a gas that is generally difficult to adsorb.

  In order not to form an intermetallic compound with each other and to alloy metals having a mixing enthalpy greater than 0 and improve the activity, mixing by mechanical alloying is an optimal method.

  Moreover, it is a heat insulator characterized by using an adsorbent capable of adsorbing moisture or oxygen separately from the gas adsorbing alloy together with the gas adsorbing alloy.

  The gas adsorption alloy of the present invention can adsorb moisture or oxygen, but an atmosphere with little moisture or oxygen is preferable in order to maintain adsorption activity for nitrogen and the like. Therefore, when the adsorption object is nitrogen or the like, it is preferable to use an adsorbent capable of adsorbing moisture or oxygen.

  Moreover, it has the core material which consists of a porous body in the space covered with the jacket material, It is characterized by the above-mentioned.

  As a result, for example, even if a thin metal plate or a laminate film such as plastic is used as the jacket material, the inner core material becomes a spacer and can withstand atmospheric compression, thereby reducing heat leaks transmitted through the jacket material. It becomes a heat insulator that can.

  Conventionally, many thermos bottles have a cylindrical shape in order to withstand atmospheric compression. However, since the present invention has a core material, a cylindrical shape, a flat plate shape, a rectangular parallelepiped shape, a box shape, etc. Any of various forms of insulation can be obtained.

  In addition, since the core material is provided as described above, the exhaust resistance during evacuation increases, and it may take time for evacuation or it may be difficult to achieve a predetermined degree of vacuum. However, by using a highly active gas adsorption alloy as in the present invention, it becomes possible to adsorb residual nitrogen and the like, for example, exhausting with a vacuum pump up to a certain degree of vacuum, and then the residual gas with the adsorbent of the present invention Thus, it is possible to obtain a heat insulator with high production efficiency, such as obtaining a predetermined degree of vacuum by adsorbing.

  Further, the heat insulating body is characterized in that the jacket material is a box containing metal.

  Unlike a planar heat insulator, it is difficult to uniformly reduce the pressure inside a box having a plurality of surfaces. Furthermore, when the distance between the walls inside the box is small, particularly when the thickness is 30 mm or less, it is difficult to reduce the pressure uniformly.

  However, by using a highly active gas adsorption alloy as in the present invention, it becomes possible to adsorb residual nitrogen and the like, so that the gas inside the box can be adsorbed and reduced in pressure uniformly, so that the heat insulation performance is high and the production efficiency is high. A high box heat insulator can be obtained.

  Also, a freezing / refrigeration apparatus or a cooling / heating apparatus comprising an inner box and an outer box, a heat insulator disposed in a space formed by the outer box and the inner box, and the space other than the heat insulator filled with a foam heat insulator It is.

  Refrigeration / refrigeration equipment or cold heat with excellent heat insulation performance by placing the heat insulation with excellent heat insulation performance of the present invention in the space consisting of the inner box and outer box and filling the other space with foam insulation. Equipment can be obtained.

The heat insulator of the present invention includes at least an adsorbent capable of adsorbing a gas and a gas barrier outer covering material covering the adsorbent, and the adsorbent does not form at least Li and an intermetallic compound with Li. a transition metal is a gas adsorption alloy formed by mixing by mechanical alloying, and the enthalpy of mixing of the two metals is rather greater than 0, the at least partially compatible between two metal happening Thus, it is possible to adsorb gases such as nitrogen, oxygen, hydrogen, carbon dioxide, carbon monoxide, and moisture in the heat insulator, and in particular, gases such as nitrogen, and improve heat insulation performance.

  That is, when making a vacuum heat insulator, it is possible to adsorb residual gas that cannot be evacuated, thereby reducing the initial thermal conductivity, and the gas that passes through the jacket material and enters from the outside over time. Therefore, the reliability over time can be improved.

  Further, for example, a heat insulator with high production efficiency can be obtained by a method such as evacuating with a vacuum pump until a certain degree of vacuum, and then adsorbing residual gas with the adsorbent of the present invention to obtain a predetermined degree of vacuum. Can do it.

The invention according to claim 1 includes at least an adsorbent capable of adsorbing a gas and a gas barrier outer covering material covering the adsorbent, wherein the adsorbent includes at least Li, Li, and an intermetallic compound. a gas adsorbing alloy and a transition metal formed by mixing by mechanical alloying is not made, and the enthalpy of mixing of the two metals is rather greater than 0, at least partially compatible between the two metal Is a thermal insulator characterized by

  The alloy here refers to a substance composed of two or more metals.

  Moreover, it can be confirmed from, for example, X-ray diffraction that metals do not form an intermetallic compound.

  Moreover, it is sufficient that at least two kinds of metals do not form an intermetallic compound. For example, one or more elements can be added, and the elements can form a compound with the metal.

  It can be confirmed from the phase diagram, for example, that the enthalpy of mixing is greater than 0, for example, from the fact that the lines do not intersect even if the temperature is raised to some extent as shown in FIG.

  The phase diagram of the metal species having an enthalpy of mixing greater than 0 includes a phase diagram representing a non-solid solution type or a eutectic type as shown in FIG.

  Examples of adsorbable gases include nitrogen, oxygen, hydrogen, water vapor, carbon monoxide, carbon dioxide, nitrogen oxides, sulfur oxides, hydrocarbons, and the like, but are not particularly specified.

  In addition, the term “adsorption” in this report includes absorption to the inside in addition to adsorption to the surface.

  Further, since the adsorbent described in the present invention is highly active, it can be adsorbed at normal temperature or lower, particularly in a low pressure region at room temperature or in an atmosphere of about 80 ° C. or lower.

  In addition, the usage form of the alloy includes powder, compression molding, pelletization, sheet form, thin film form, accommodation in another container, vapor deposition onto other substances, but is not particularly specified. .

  Further, as the jacket material, a laminate film having at least a heat fusion layer, a gas barrier layer, a protective layer, a container made of metal, plastic, glass, or the like, or a combination thereof can be used.

  In addition, such a heat insulating body creates a vacuum heat insulating space by inserting a gas adsorption alloy into the jacket material, evacuating the jacket material, and then sealing the jacket material. Maintain the degree of vacuum in the jacket material, or evacuate the jacket material to an industrially easily reachable degree, and then seal the jacket material. It works like a two-stage decompression by adsorbing gas with a gas adsorption alloy, or the gas adsorption alloy is sealed in a separate container and the inside of the jacket material is evacuated to a predetermined pressure, and then the gas adsorption alloy is By making it possible to communicate with the jacket material in some way, it is possible to work like a two-stage decompression while keeping the gas adsorption alloy more active, but the usage method is particularly specified Not what you want.

  Examples of transition metals having a mixed enthalpy greater than 0 with Li include Co, Cr, Cu, Fe, Hf, Mn, Mo, Nb, Ni, Ta, Ti, V, W, Y, and Zr.

  The transition metal content is preferably 5 mol% or more and 95 mol% or less.

  When the transition metal content is less than 5 mol% with respect to 100 mol% of the alloy, it becomes difficult to uniformly mix with the transition metal due to the increase in highly ductile Li, and when it exceeds 95 mol%, the highly active Li decreases. This is because the gas adsorption activity is reduced.

  That at least a part is compatible means that at least a part of the two metals cannot be physically separated. For example, a state in which a part of the boundary surface between two kinds of metals is mixed with metals at an atomic level is not limited thereto.

  “Mixing by mechanical alloying” refers to a mechanical mixing method and is not particularly specified. In order to produce a highly active gas adsorption alloy, it is preferable to perform mechanical alloying in an inert gas, for example, in an atmosphere of Ar, He, or the like.

The invention according to claim 2, the nitrogen adsorption amount of the gas adsorption alloy, cold, a heat insulation body according to claim 1, characterized in that at normal pressure is 10 cm 3 / ^g or more.

Nitrogen adsorption occurs even under reduced pressure, but it is sufficient to adsorb 10 cm ³ / g or more by measurement under normal temperature and normal pressure conditions around 25 ° C.

  The measuring method is not particularly specified, and known methods such as an adsorption capacity method and a gravimetric method can be used.

  In addition, by using such a gas adsorption alloy, the amount of nitrogen adsorption is large, so for example, the inside of the jacket material is evacuated with a vacuum pump to a degree of vacuum that is industrially easily reachable, and the remaining gas after that is gas adsorption alloy Adsorption can be performed more efficiently.

The invention according to claim 3, wherein with gas adsorption alloy, separate from the gas adsorption alloy, according to claim 1 or 2, characterized in that the moisture or oxygen in combination capable of adsorbing adsorbent It is a heat insulator.

  Examples of the adsorbent capable of adsorbing moisture or oxygen include calcium oxide, magnesium oxide, strontium oxide, barium oxide, zeolite, silica gel, unsaturated fatty acid, iron and iron compounds, but are not particularly specified. Multiple use is also possible.

  When using an adsorbent capable of adsorbing moisture or oxygen together with a gas adsorption alloy, these are separately or mixed in the space in the jacket material and arranged as a powder or a molded body, or a breathable container, etc. It is conceivable to use these separately or mixed and encapsulated, but it is not particularly specified.

The invention according to claim 4 is the heat insulator according to claim 3 , wherein at least one surface of the molded gas adsorption alloy is coated with an adsorbent capable of adsorbing moisture or oxygen. .

  The molded gas adsorption alloy may be compression molded, tableted, pelletized, or used in a state where powder is put in a separate container, or a product obtained by compression molding of at least one of them. It is only necessary to cover one surface with an adsorbent capable of adsorbing moisture or oxygen, and at least a part of one surface, or several surfaces or the entire surface may be covered.

  By adopting such a configuration, moisture, etc. is adsorbed with a general-purpose adsorbent, and then it is designed so that it is possible to adsorb gas efficiently, such as adsorbing gas that is harder to adsorb with gas adsorption alloy. Can do.

The invention according to claim 5 is characterized in that, in the space covered with the jacket material, in addition to the adsorbent capable of adsorbing gas, a core material made of a porous body is provided. It is a heat insulating body as described in any one of 1-4 .

  A core material made of a porous material is not particularly specified, such as fibers, powders, foamed resins, thin film laminates, or mixtures thereof, but is a fibrous material that tends to deteriorate in thermal conductivity due to gas. Use of a core material and a gas adsorption alloy is more effective.

Moreover, the invention according to claim 6 is the heat insulator according to any one of claims 1 to 5 , wherein the covering material is a box containing metal.

  The box containing metal is a plate made of stainless steel, iron, aluminum, or the like, or a plate made of plastic or the like on which metal is vapor-deposited.

The invention described in Claim 7 is a thermal insulator according to claim 6, wherein at least a portion of the distance between the walls of the box body portion is 30mm or less.

The invention according to claim 8 is a refrigeration / refrigeration apparatus or a refrigeration apparatus, characterized in that the heat insulator according to claim 6 or 7 is used as a heat insulation box for refrigeration / refrigeration or refrigeration.

The invention according to claim 9 includes an inner box and an outer box, and a heat insulator is disposed in a space formed by the outer box and the inner box, and a foam heat insulator is provided in the space other than the heat insulator. filled, the heat-insulating body is a refrigerated device or cool thermal device and having a heat-insulating body according to any one of claims 1 to 5.

  For example, when applied to a refrigerator, a vacuum heat insulating material is applied to the outer box side or the inner box side of the space between the outer box and the inner box of the refrigerator, and other spaces are filled with resin foam, or the vacuum heat insulating material and the foam are filled. There is no particular designation such that the heat insulating body integrally foamed with the resin body is disposed in the space between the outer box and the inner box of the refrigerator, is similarly used for the door portion, or is used for the partition plate.

  In addition, the refrigeration equipment and the cooling / heating equipment are shown as representatives of equipment that requires heat insulation at a room temperature from -30 ° C., which is an operating temperature range, and can be used for, for example, a cold car or a refrigerator using electronic cooling. . It also refers to cold / hot equipment that uses hot and cold heat up to higher temperatures, such as vending machines. Moreover, the apparatus which does not require motive power, such as a gas apparatus or a cooler box, is also included.

  Furthermore, it can also be used in a higher temperature region for heat insulation / heat storage / heat insulation, such as a heat insulation / heat storage exterior material of a personal computer, a jar pot, a rice cooker, or an automobile engine.

In the invention according to claim 10 , the refrigeration / refrigeration equipment or the cooling / heating equipment has a compressor, the adsorbent is disposed in the vicinity of the compressor, and the activity of the adsorbent is improved by heat from the compressor. The refrigeration / refrigeration apparatus or the refrigeration apparatus according to claim 8 or 9 , wherein the apparatus is capable of being made.

  Arranging the adsorbent in the vicinity of the compressor is not particularly specified that the adsorbent is not only placed in the same space but also approached, and a buffer is sandwiched or a wall is sandwiched.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a schematic diagram showing a heat insulator in Embodiment 1 of the present invention.

  In FIG. 1, a heat insulator 1 includes a gas adsorbing alloy 2, a container 3 for storing the gas adsorbing alloy 2, and a jacket material 4 composed of a metal double cylindrical container covering the gas adsorbing alloy 2 and the container 3. The inside of the jacket material 4 (the space between the double cylindrical containers) is decompressed.

  Li and Fe were used as the gas adsorption alloy 2. Li and Fe were mixed by mechanical alloying in a ball mill in an Ar atmosphere.

  Further, it was confirmed from the phase diagram of Li—Fe in FIG. 2 that the mixing enthalpy was larger than zero.

  Such metals cannot normally be obtained even if the temperature is raised, but they can be mixed with each other by mixing by mechanical alloying. The reason why they can be mixed with each other is that a part of the boundary surface between the two types of metals is nano-level and the metals are mixed with each other, and the compatibility occurs at the boundary surface between the two types of metals. I think.

  The evaluation results of gas adsorption in the heat insulator 1 are shown below. In the evaluation, the gas adsorption alloy sealed in the sealed container 3 is allowed to stand in the jacket material 4 made of a cylindrical container, and after the inside of the jacket material 4 is evacuated to about 1 kPa, the gas adsorption alloy 2 is sealed. The sealed container 3 was made to be air permeable so that the residual gas in the jacket material 4 could be adsorbed. When the pressure change in the jacket material was observed, the atmospheric pressure was changed from 1 kPa to 15 Pa.

(Embodiment 2)
FIG. 3 is a schematic diagram showing a heat insulator in the second embodiment of the present invention.

  In FIG. 3, the heat insulator 5 includes an adsorbent 6, a core material 7, and a jacket material 8 that covers the adsorbent 6 and the core material 7, and decompresses the inside of the jacket material 8.

  An inorganic fiber aggregate is used as the core material 7, and a laminate film composed of a heat fusion layer, a gas barrier layer, and a surface protective layer is used as the jacket material 8.

  4, 5 and 6 are schematic views showing the adsorbent 6 of the present embodiment.

  Example 1 uses an adsorbent 6A in which a gas adsorbing alloy 2 is put in a bag material 9 as shown in FIG. 4. In Example 2, as shown in FIG. 5, the gas adsorbing alloy 2 and moisture are used. The adsorbent 6B in which the adsorbent 10 is put in the container 11 is used, and in Example 3, the adsorbent 6C in which the gas adsorption alloy 2 is covered with the moisture adsorbent 10 is used as shown in FIG.

  FIG. 7 is a schematic diagram showing the heat insulator 12 in Example 4 of the second embodiment.

  Example 1 to Example 4 show the evaluation results of gas adsorption in a heat insulator with different types of adsorbents. In all the evaluations, the inside of the jacket material in which the adsorbent was left still was evacuated to about 1 kPa and sealed, and then the pressure change in the jacket material was observed.

  Further, after the pressure in the jacket material became minimum, it was left for a predetermined time, and the gas adsorption alloy 2 in the jacket material was taken out so as not to come into contact with the outside air. The gas adsorption alloy 2 was left in a closed system in a nitrogen atmosphere, and the pressure change in the system was observed to evaluate the remaining ability of each gas adsorption alloy 2 for nitrogen adsorption.

Example 1
As the adsorbent 6A, as shown in FIG. 4, a gas-absorbing alloy 2 enclosed in a breathable bag material 9 is used. The gas adsorption alloy 2 is the same as that shown in the first embodiment.

  When the adsorbent 6A was disposed in the jacket material, the atmospheric pressure was about 1 kPa to 15 Pa.

  Moreover, after leaving the heat insulating body 5 which became 15 Pa for a predetermined time, when the residual capability with respect to nitrogen adsorption | suction of the gas adsorption alloy 2 was evaluated, it confirmed that nitrogen was adsorb | sucked slightly.

(Example 2)
As the adsorbent 6B, as shown in FIG. 5, the gas adsorbing alloy 2 is placed at the bottom of a container 11 having an upper surface as an opening, and the adsorbent 6B is covered with a water adsorbent 10 made of calcium oxide and compression molded. It was.

  When the adsorbent 6B was disposed in the jacket material, the atmospheric pressure was about 1 kPa to 15 Pa.

  Moreover, after leaving the heat insulating body 5 which became 15 Pa for a predetermined time, when the residual capability with respect to nitrogen adsorption of the gas adsorption alloy 2 was evaluated, it confirmed that nitrogen was adsorb | sucked.

  This is presumably because the surroundings were covered with the moisture adsorbing material 10 and the container 11 as compared with Example 1, and moisture and the like were adsorbed by the moisture adsorbing material, so that the load on the gas adsorption alloy 2 was reduced.

(Example 3)
As the adsorbent 6C, as shown in FIG. 6, the periphery of the compression-adsorbed gas adsorption alloy 2 is further covered with a moisture adsorbent 10 made of calcium oxide and compression-molded.

  When the adsorbent 6C was disposed in the jacket material, the atmospheric pressure was about 1 kPa to 15 Pa.

  Moreover, after leaving the heat insulating body 5 which became 15 Pa for a predetermined time, when the residual capability with respect to nitrogen adsorption of the gas adsorption alloy 2 was evaluated, it confirmed that nitrogen was adsorb | sucked.

  This is thought to be because the load on the gas adsorption alloy 2 was reduced because the surroundings were covered with the moisture adsorbing material 10 as compared with Example 1, and moisture and the like were adsorbed by the moisture adsorbing material.

Example 4
As the heat insulator 12, as shown in FIG. 7, a material in which the gas adsorbing alloy 2 is enclosed in the bag material 9 and a material in which the moisture adsorbing material 10 is encapsulated in the bag material 9 are used separately. .

  When these adsorbents were disposed in the jacket material, the atmospheric pressure was about 1 kPa to 15 Pa.

  In addition, after the heat insulating body 12 having reached 15 Pa was left for a predetermined time, the residual capacity of the gas adsorption alloy 2 with respect to nitrogen adsorption was evaluated, and it was confirmed that nitrogen was adsorbed. It is inferior when compared.

  Next, the comparative example with respect to the heat insulating body of this invention is shown. The evaluation method is in accordance with Example 1.

(Comparative Example 1)
The comparative example with respect to the heat insulating body of this invention is shown. In FIG. 3, a Ni—Ti alloy was used as the adsorbent 6a. Ni and Ti were mechanically alloyed and mixed in a ball mill in an Ar atmosphere. As a result, the Ni-Ti alloy produced an intermetallic compound.

  When the adsorbent 6a was disposed in the jacket material, the atmospheric pressure hardly decreased from about 1 kPa.

(Embodiment 3)
FIG. 8 is a schematic diagram showing a heat insulator in the third embodiment of the present invention.

  In FIG. 8, the present embodiment is a combination of a heat insulator 13 and a heat insulator 14. The adsorbent 6B and the core material 7 have the same configuration as that shown in Example 2 of the second embodiment.

  The heat insulator 13 uses a box 15 in which a plurality of plate-shaped members made of stainless steel are processed to have a hollow inside. The heat insulator 14 is used as a door body.

  When the heat insulators 13 and 14 are formed, after the core material 7 made of the inorganic fiber aggregate and the adsorbent 6B are arranged inside the box, the inside of the box is evacuated and sealed.

  The time required for the internal pressure of the heat insulator 13 configured as described above to reach 50 Pa is less than one-fifth compared with the time required to reach 50 Pa only by vacuum evacuation, thereby improving production efficiency. Confirmed that it was possible.

(Embodiment 4)
FIG. 9 is a schematic diagram showing a refrigerator in the fourth embodiment of the present invention.

  In FIG. 9, the refrigerator 16 includes a heat insulation box 17 using the heat insulator 5 having the same configuration as that shown in Embodiment 2 as a heat insulator.

  The heat insulating box 17 has a heat insulating body 5 disposed on the outer box 18 side inside a box made of an outer box 18 made of iron plate and an inner box 19 made of plastic, and a space other than the heat insulating body 5 is hard. It is foam-filled with urethane foam 20.

  An evaporator 21 is disposed in the refrigerator 16, and the compressor 22, the condenser 23, and the capillary tube 24 are connected in an annular shape to form a refrigeration cycle.

  In addition, a door body 25 is attached to the refrigerator 16, a heat insulating body 5 is disposed inside the door body 25, and a space portion other than the heat insulating body 5 is foam-filled with a hard urethane foam 20.

  When the electric power consumption of the refrigerator 16 comprised in this way was measured, it was falling 30% from the refrigerator which does not mount | wear with the heat insulating body 5, and the heat insulation effect was confirmed.

  As described above, the heat insulator according to the present invention can improve the production efficiency and the heat insulation performance by making it possible to adsorb the gas in the heat insulator, in particular, the gas having lower activity. It can exhibit excellent heat insulation performance, and can be applied to all types of heat insulation such as hot and cold equipment such as refrigerators and refrigerators, and objects to be protected from heat and cold.

1 is a schematic perspective view showing a heat insulator in Embodiment 1 of the present invention. Li-Fe phase diagram Schematic sectional view showing a heat insulator in Embodiment 2 of the present invention. Schematic sectional view showing an example of an adsorbent used for a heat insulating material in Embodiment 2 of the present invention Schematic sectional drawing which shows another example of the adsorbent used for the heat insulating material in Embodiment 2 of this invention Schematic sectional drawing which shows another example of the adsorbent used for the heat insulating material in Embodiment 2 of this invention. Schematic sectional view showing a heat insulator in Embodiment 2 of the present invention. Schematic sectional view showing a heat insulator in Embodiment 3 of the present invention. Schematic sectional view showing a refrigerator according to Embodiment 4 of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Heat insulator 2 Gas adsorption alloy 3 Container 4 Cover material 5 Heat insulator 6 Adsorbent material 7 Core material 8 Cover material 9 Bag material 10 Moisture adsorbent material 11 Container 12 Heat insulator 13 Heat insulator 14 Heat insulator 15 Box 16 Refrigerator 17 Heat insulation box 18 Outer box 19 Inner box 20 Hard urethane foam 22 Compressor 25 Door body

Claims (10)

At least an adsorbent capable of adsorbing gas and a gas barrier outer covering material covering the adsorbent, and the adsorbent is mechanically alloyed with at least Li and a transition metal that does not form an intermetallic compound with Li. a gas adsorption alloy formed by mixing with, and the enthalpy of mixing of the two metals is rather greater than 0, and at least some of which have occurred compatible between the two metal Insulation. The heat insulating body according to claim 1 , wherein the nitrogen adsorption amount of the gas adsorption alloy is 10 cm ³ / g or more at normal temperature and normal pressure. Wherein with gas adsorption alloy, it said separate from the gas adsorption alloy, heat insulation body according to claim 1 or 2 moisture or oxygen, characterized in that in combination capable of adsorbing adsorbent. The heat insulator according to claim 3 , wherein at least one surface of the molded gas adsorption alloy is covered with an adsorbent capable of adsorbing moisture or oxygen. The covered space in the outer covering material, in addition to the adsorbable adsorbent gas, according to any one of claims 1 to 4, characterized in that it comprises a core made of a porous material Insulation. The heat insulating body according to any one of claims 1 to 5 , wherein the covering material is a box containing metal. The heat insulating body according to claim 6 , wherein a distance between at least some of the walls inside the box is 30 mm or less. A refrigeration / refrigeration apparatus or a refrigeration apparatus, wherein the heat insulator according to claim 6 or 7 is used as a heat insulation box for refrigeration / refrigeration or refrigeration. An inner box and an outer box are provided, a heat insulator is arranged in a space formed by the outer box and the inner box, and the space other than the heat insulator is filled with a foam heat insulator, and the heat insulator is from claim 1. A refrigeration / refrigeration apparatus or a refrigeration apparatus comprising the heat insulator according to any one of claims 5 to 6. Claim 8 wherein the frozen, chilled equipment or cool thermal device has a compressor, the adsorbent is disposed in the vicinity of the compressor, the heat from the compressor, characterized in that to enable improved activity of the adsorbent Or the freezing / refrigeration apparatus or refrigeration equipment of 9 .

Images