JPH07269780A - Vacuum heat insulating body and manufacture thereof - Google Patents
Vacuum heat insulating body and manufacture thereofInfo
- Publication number
- JPH07269780A JPH07269780A JP6061297A JP6129794A JPH07269780A JP H07269780 A JPH07269780 A JP H07269780A JP 6061297 A JP6061297 A JP 6061297A JP 6129794 A JP6129794 A JP 6129794A JP H07269780 A JPH07269780 A JP H07269780A
- Authority
- JP
- Japan
- Prior art keywords
- heat insulating
- vacuum
- adsorbent
- insulating material
- container
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Thermal Insulation (AREA)
- Refrigerator Housings (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、真空断熱体において、
特に真空断熱体の真空度低下を防止するための技術に関
する。BACKGROUND OF THE INVENTION The present invention relates to a vacuum heat insulator,
In particular, the present invention relates to a technique for preventing a vacuum degree of a vacuum heat insulator from lowering.
【０００２】[0002]
【従来の技術】真空断熱体は、非通気性を有する外装体
内に真空且つ気密状態で断熱材を充填した構成になって
おり、外装体内に断熱材を充填する工程と外装体内を真
空引きする工程と外装体を密閉する工程とを順次行うこ
とにより形成される。この種真空断熱体においては、外
装体内の真空度が劣化すると断熱性能が低下してしまう
ので、外装体内を極力小さな圧力に保持しておかなくて
はならない。2. Description of the Related Art A vacuum heat insulator has a structure in which a heat insulating material is filled in a vacuum and airtight state in a non-air permeable outer body, and a step of filling the outer body with the heat insulating material and evacuating the outer body. It is formed by sequentially performing the steps and the step of sealing the outer package. In this type of vacuum heat insulator, the heat insulation performance is deteriorated when the degree of vacuum inside the outer package deteriorates. Therefore, it is necessary to keep the pressure inside the outer package as small as possible.
【０００３】[0003]
【発明が解決しようとする課題】ところで、外装体に充
填する断熱材には若干量の水分が含まれており、上記従
来の真空断熱体においては、残留水分の気化に伴い外装
体内の真空度が劣化し、ひいては、断熱性能が低下して
しまう虞れがあった。By the way, the heat insulating material filled in the exterior body contains a small amount of water. In the conventional vacuum heat insulation body described above, the degree of vacuum in the exterior body is increased as the residual water vaporizes. May deteriorate, and eventually the heat insulating performance may decrease.
【０００４】本発明は上記事情に鑑みてなされたもので
あり、その目的は、断熱性能の低下を極力防止すること
ができる真空断熱体および真空断熱体の製造方法を提供
することにある。The present invention has been made in view of the above circumstances, and an object thereof is to provide a vacuum heat insulator and a method for manufacturing the vacuum heat insulator, which can prevent deterioration of heat insulation performance as much as possible.
【０００５】[0005]
【課題を解決するための手段】請求項１記載の発明は、
非通気性を有する外装体と、この外装体内に真空且つ気
密状態で充填された断熱材とを備えた真空断熱体におい
て、前記断熱材には、予め脱水された水分を吸着するた
めの吸着剤が混入されているところに特徴を有する。請
求項２記載の発明は、請求項１記載の断熱体を製造する
ための方法において、脱水化された吸着剤を容器内に真
空且つ気密状態で充填する工程と、吸着剤が収容された
容器および断熱材を外装体内に真空且つ気密状態で充填
する工程と、前記容器を破壊して前記断熱材に前記吸着
剤を混入する工程とを備えたところに特徴を有する。The invention according to claim 1 is
A vacuum heat insulating body comprising a non-air-permeable outer body and a heat insulating material filled in the outer body in a vacuum and airtight state, wherein the heat insulating material is an adsorbent for adsorbing water dehydrated in advance. It has a feature in that is mixed. According to a second aspect of the present invention, in the method for producing the heat insulating body according to the first aspect, a step of filling a dehydrated adsorbent in a container in a vacuum and airtight state, and a container accommodating the adsorbent And a step of filling the heat insulating material into the outer package in a vacuum and airtight state, and a step of destroying the container and mixing the adsorbent with the heat insulating material.
【０００６】[0006]
【作用】請求項１記載の手段によれば、脱水された吸着
剤が断熱材に混入されているため、水分が吸着剤により
吸着され、外装体内の圧力上昇が抑止される。従って、
外装体内の真空度が劣化することを防止でき、その結
果、断熱性能の低下も防止できる。請求項２記載の手段
によれば、脱水化された吸着剤を容器内に充填した後、
この容器および断熱材を外装体内に充填して容器を破壊
するので、容器破壊後の外装体内は脱水化された吸着剤
が断熱材に混入した形態となり、断熱材の水分が効果的
に吸着される。According to the means of the first aspect, since the dehydrated adsorbent is mixed in the heat insulating material, moisture is adsorbed by the adsorbent and the pressure rise in the outer package is suppressed. Therefore,
It is possible to prevent the degree of vacuum inside the exterior body from deteriorating, and as a result, it is possible to prevent a decrease in heat insulation performance. According to the means of claim 2, after filling the dehydrated adsorbent into the container,
Since the container and the heat insulating material are filled into the outer casing to destroy the container, the dehydrated adsorbent is mixed with the heat insulating material in the outer body after the container is destroyed, and the moisture of the heat insulating material is effectively absorbed. It
【０００７】[0007]
【実施例】以下、本発明を冷蔵庫の断熱パネルに適用し
た一実施例について、図面を参照しながら説明する。ま
ず、断熱パネル１の完成形態を示す図１において、容器
状をなす外装体２は、２枚のフィルム３の周縁部を接合
することから形成されており、各フィルム３は、通気遮
断用の金属箔を２枚のプラスチックフィルムでサンドイ
ッチした３層構造をなしている。そして、各フィルムを
構成するプラスチックフィルムのうち内側に位置するも
のは熱可塑性プラスチックを基材としており、２枚のフ
ィルム３相互間は、これら熱可塑性プラスチックフィル
ムを熱圧着することにより密閉にされている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a heat insulating panel of a refrigerator will be described below with reference to the drawings. First, in FIG. 1 showing the completed form of the heat insulating panel 1, the container-shaped outer casing 2 is formed by joining the peripheral portions of two films 3, and each film 3 is for ventilation blocking. It has a three-layer structure in which a metal foil is sandwiched between two plastic films. Among the plastic films forming each film, the one located inside is made of thermoplastics as a base material, and the two films 3 are hermetically sealed by thermocompression-bonding these thermoplastic films. There is.
【０００８】外装体２の内部には充填体４が収容されて
いる。この充填体４は、紙や不織布等の通気性部材から
なる内袋４ａおよび内袋４ａの内部に充填された粉末シ
リカ等の断熱材４ｂを備えたものであり、内袋４ａの内
部には断熱材４ｂの他にガラス製の容器５が収容され、
容器５内には、予めは脱水された吸着剤６が充填されて
いる。この吸着剤６は外装体２内の水分を吸着するため
のものであり、細孔径５Ａのモレキュラシーブスからな
る。そして、容器５は、その封止部５ａが折損されるこ
とにより断熱材４ｂ内に開放され、これにより、断熱材
４ｂに吸着剤６が混入した形態になっている。A filling body 4 is housed inside the exterior body 2. The filling body 4 includes an inner bag 4a made of a breathable material such as paper or non-woven fabric and a heat insulating material 4b such as powder silica filled in the inner bag 4a. A glass container 5 is housed in addition to the heat insulating material 4b,
The container 5 is filled with the adsorbent 6 that has been dehydrated in advance. The adsorbent 6 is for adsorbing the moisture in the exterior body 2 and is made of molecular sieves having a pore diameter of 5A. Then, the container 5 is opened into the heat insulating material 4b by breaking the sealing portion 5a, and thus the adsorbent 6 is mixed in the heat insulating material 4b.
【０００９】尚、吸着剤６の充填量は、吸着剤６の吸着
能力および断熱材４ｂの含有水分量を考慮し、断熱材４
ｂの含有水分を吸着し得る最小の値に止めることが好ま
しい。例えば、断熱材４ｂは１ｗｔ％程度の水分を有し
ているため、断熱材４ｂの充填量を２００ｇとすると、
外装体２の残留水分量は、２００ｇ×１（ｗｔ％）＝２
ｇになる。これに対し、吸着剤６の吸着能力が２００
（ｍｇ／ｇ）であれば、２ｇの水分を吸着可能なよう
に、吸着剤６の充填量を１０ｇに設定する。The filling amount of the adsorbent 6 is determined in consideration of the adsorption capacity of the adsorbent 6 and the water content of the heat insulating material 4b.
It is preferable to keep the water content of b to the minimum value that can be adsorbed. For example, since the heat insulating material 4b has a water content of about 1 wt%, if the filling amount of the heat insulating material 4b is 200 g,
The residual water content of the outer package 2 is 200 g × 1 (wt%) = 2
It becomes g. In contrast, the adsorption capacity of the adsorbent 6 is 200
If it is (mg / g), the filling amount of the adsorbent 6 is set to 10 g so that 2 g of water can be adsorbed.
【００１０】次に、真空断熱パネル１のリーク検査装置
の構成を図２に基づいて説明する。平板状をなす下ケー
ス７の上側には上ケース８が設けられている。この上ケ
ース８は、アクチュエータ（図示せず）により上下動可
能にされており、下降されることに伴い下ケース７のシ
ール部７ａに圧接され、下ケース７との間で密閉室９を
形成する。また、密閉室９内には熱圧着装置１０が設け
られている。この熱圧着装置１０は、上下動可能な上部
挟持体１０ａおよび固定配置された下部挟持体１０ｂを
主体に構成されたものであり、所定温度まで昇温された
上下挟持体１０ａ，１０ｂにより真空断熱パネル１のフ
ィルム３，３を押え込み、両者を熱圧着する。即ち、こ
のリーク検査装置は断熱パネル１の製造装置も兼用して
いる。Next, the structure of the leak inspection device for the vacuum heat insulation panel 1 will be described with reference to FIG. An upper case 8 is provided on the upper side of the lower case 7 having a flat plate shape. The upper case 8 can be moved up and down by an actuator (not shown), and when it is lowered, it is pressed against the seal portion 7a of the lower case 7 to form a closed chamber 9 with the lower case 7. To do. A thermocompression bonding device 10 is provided in the closed chamber 9. The thermocompression bonding apparatus 10 is mainly composed of an upper sandwiching body 10a that is vertically movable and a lower sandwiching body 10b that is fixedly arranged, and is vacuum insulated by the upper and lower sandwiching bodies 10a and 10b heated to a predetermined temperature. The films 3 and 3 of the panel 1 are pressed in, and both are thermocompression bonded. That is, this leak inspection device also serves as a manufacturing device for the heat insulation panel 1.
【００１１】密閉室９にはパイプ１１ａおよび１１ｂが
接続されている。そして、左側のパイプ１１ａには、真
空ポンプを主体とする真空引き装置１２が接続されてお
り、真空引き装置１２が作動すると、密閉室９内が真空
引きされる。また、右側のパイプ１１ｂには、ヘリウム
ボンベを主体とするヘリウム注入装置１３が接続されて
おり、ヘリウム注入装置１３が作動すると、密閉室９内
にヘリウムガスが加圧注入される。Pipes 11a and 11b are connected to the closed chamber 9. Then, the left pipe 11a is connected to a vacuuming device 12 mainly composed of a vacuum pump, and when the vacuuming device 12 operates, the inside of the closed chamber 9 is vacuumed. A helium injection device 13 mainly composed of a helium cylinder is connected to the right pipe 11b, and when the helium injection device 13 operates, helium gas is injected under pressure into the closed chamber 9.
【００１２】左側のパイプ１１ａにはパイプ１１ｃが接
続されている。このパイプ１１ｃには、質量分析器を主
体とするヘリウム検出装置１４が接続されており、密閉
室９内のヘリウムはヘリウム検出装置１４により検出さ
れる。尚、パイプ１１ａ〜１１ｃには、それら各経路を
開閉するためのバルブ１５ａ〜１５ｃが介在されてお
り、後述するように、真空引き装置１２による真空引き
操作，ヘリウム注入装置１３によるヘリウム注入操作，
ヘリウム検出装置１４によるヘリウム検出操作は、バル
ブ１５ａ〜１５ｃの開放に連動して行われる。A pipe 11c is connected to the left pipe 11a. A helium detection device 14 mainly including a mass spectrometer is connected to the pipe 11c, and the helium in the closed chamber 9 is detected by the helium detection device 14. The pipes 11a to 11c are provided with valves 15a to 15c for opening and closing the respective paths, and as will be described later, a vacuum evacuation device 12 performs a vacuum evacuation operation, a helium injection device 13 performs a helium injection operation,
The helium detection operation by the helium detection device 14 is performed in conjunction with the opening of the valves 15a to 15c.
【００１３】次に、真空断熱パネル１の製造方法および
リーク検査方法について説明する。まず、図３の（ａ）
に示すように、容器５内に吸着剤６を投入する。そし
て、（ｂ）に示すように、容器５を加熱しながら真空排
気することにより、吸着剤６の脱水化および容器５内の
真空化を行う。この後、（ｃ）に示すように、容器５の
上部を加熱することにより、容器５を溶融して封止部５
ａを形成する。以上の操作が終了したら、（ｄ）に示す
ように、容器５および断熱材４ｂを内袋４ａ内に収容し
て充填体４を形成する。これと共に、（ａ´）に示すよ
うに、フィルム３，３を重ね、（ｂ´）に示すように、
その３辺を熱圧着することにより外装体２を形成し、
（ｅ）に示すように、この外装体２の熱圧着されていな
い残りの１辺から、（ｄ）工程で形成した充填体４を収
容する。Next, a method for manufacturing the vacuum heat insulating panel 1 and a leak inspection method will be described. First, (a) of FIG.
As shown in, the adsorbent 6 is put into the container 5. Then, as shown in (b), the container 5 is evacuated while being heated, whereby the adsorbent 6 is dehydrated and the container 5 is evacuated. Thereafter, as shown in (c), by heating the upper portion of the container 5, the container 5 is melted and the sealing portion 5
a is formed. When the above operation is completed, as shown in (d), the container 5 and the heat insulating material 4b are housed in the inner bag 4a to form the filling body 4. Along with this, as shown in (a '), the films 3 and 3 are overlapped, and as shown in (b'),
The outer body 2 is formed by thermocompression bonding the three sides,
As shown in (e), the filling body 4 formed in the step (d) is accommodated from the remaining one side of the exterior body 2 which is not thermocompression bonded.
【００１４】（ｅ）工程が終了したら、図２において、
上ケース８を上昇させることにより密閉室９を開放し、
この密閉室９内に外装体２をセットする。そして、バル
ブ１５ａを開放し且つバルブ１５ｂ，１５ｃを閉塞した
状態で真空引き装置１２を作動させ、密閉室９内を真空
化する。次に、熱圧着装置１０の上部挟持体１０ａを下
降させることにより、フィルム３，３の熱圧着されてい
ない１辺を上下部挟持体１０ａ，１０ｂ間で押え込み、
該１辺を接合する。尚、熱圧着装置１０による接合条件
はフィルム３の種類等により異なるが、実験的には、上
下部挟持体１０ａ，１０ｂの温度ｔ＝１５０〜２３０°
Ｃ，加圧力Ｐ＝１〜４ｋｇ／ｃｍ２ ，加圧時間Ｔ＝
２．５秒といった条件下で圧着を行えば、良好な接合結
果を得ることができる。After the step (e) is completed, in FIG.
Open the closed chamber 9 by raising the upper case 8,
The exterior body 2 is set in the closed chamber 9. Then, with the valve 15a open and the valves 15b and 15c closed, the evacuation device 12 is operated to evacuate the closed chamber 9. Next, by lowering the upper sandwiching body 10a of the thermocompression bonding apparatus 10, one side of the films 3 and 3 which is not thermocompression bonded is clamped between the upper and lower sandwiching bodies 10a and 10b,
The one side is joined. Although the bonding conditions by the thermocompression bonding apparatus 10 differ depending on the type of the film 3 and the like, experimentally, the temperature t of the upper and lower sandwiching bodies 10a and 10b is 150 to 230 °.
C, pressing force P = 1 to 4 kg / cm 2 , pressurizing time T =
If the pressure bonding is performed under the condition of 2.5 seconds, a good bonding result can be obtained.
【００１５】以上の操作により真空断熱パネル１の製造
が終了したら、真空断熱パネル１のリークテストを行う
べく、バルブ１５ａおよび１５ｂを閉塞し、バルブ１５
ｃを開放し、ヘリウム注入装置１４を作動させることに
より、密閉室９内にヘリウムガスを加圧注入する。この
場合、断熱パネル１にリーク部分があれば、そのリーク
部分を通して外装体２内にヘリウムガスが注入されるこ
とになる。尚、ヘリウムガスを注入するにあたっては、
注入圧力が高く且つ注入時間が長い程、微小なリーク部
分にヘリウムガスを流通させることができて有利である
が、実験的には、注入圧力Ｐ1 ＝１．０５ｋｇ／ｃｍ
２ ，注入時間Ｔ1 ＝１０ｓｅｃ程度であれば、微小な
リーク部分にもヘリウムガスを十分に流通させることが
できる。After the manufacture of the vacuum insulation panel 1 is completed by the above operation, the valves 15a and 15b are closed and the valve 15 is closed in order to perform a leak test of the vacuum insulation panel 1.
By opening c and operating the helium injection device 14, helium gas is injected under pressure into the closed chamber 9. In this case, if the heat insulating panel 1 has a leak portion, the helium gas is injected into the exterior body 2 through the leak portion. When injecting helium gas,
As the injection pressure is higher and the injection time is longer, it is advantageous that the helium gas can be circulated through the minute leak portion. However, experimentally, the injection pressure P1 = 1.05 kg / cm.
2. If the injection time T1 is about 10 sec, the helium gas can be sufficiently circulated even in the minute leak portion.
【００１６】ヘリウムガスの注入作業が終了したら、密
閉室９内のヘリウムガスを回収し、再び真空引き装置１
２を作動させることにより、密閉室９内を真空引きす
る。この場合、真空断熱パネル１にリーク部分がなけれ
ば、密閉室９内から全てのヘリウムガスが回収される。
また、真空断熱パネル１にリーク部分があれば、そのリ
ーク部分から真空断熱パネル１内に加圧注入されたヘリ
ウムガスが密閉室９内に残っていることになる。After the injection work of the helium gas is completed, the helium gas in the closed chamber 9 is recovered, and the vacuum evacuation device 1 is again used.
By activating 2, the inside of the closed chamber 9 is evacuated. In this case, if there is no leak part in the vacuum heat insulating panel 1, all the helium gas is recovered from the sealed chamber 9.
If the vacuum heat insulating panel 1 has a leak portion, the helium gas pressurized and injected into the vacuum heat insulating panel 1 from the leak portion remains in the closed chamber 9.
【００１７】密閉室９内を真空引きしたら、バルブ１５
ａおよび１５ｃを閉塞し、バルブ１５ｂを開放し、ヘリ
ウム検出装置１４によりヘリウムガスの検出を行う。こ
の場合、真空断熱パネル１にリーク部分がなければ、密
閉室９内にヘリウムガスがなく、検出結果は「ヘリウム
無」になる。また、真空断熱パネル１にリーク部分があ
れば、密閉室９内にヘリウムガスがあり、検出結果は
「ヘリウム有」になるので、これらヘリウムガスの有無
に基づいて製品を選別する。リーク検査が終了したら、
密閉室９内を大気圧に戻した後、密閉室９を開放して真
空断熱パネル１を取出す。そして、真空断熱パネル１の
外部から圧力を加えることにより、図１に二点鎖線で示
すように、ガラス容器５の封止部５ａを折損する。これ
により、ガラス容器５が断熱材４ｂ内に開放され、断熱
材４ｂに充填材６が混入した形態の製品が製造される。When the inside of the closed chamber 9 is evacuated, the valve 15
The valves a and 15c are closed, the valve 15b is opened, and the helium detector 14 detects helium gas. In this case, if there is no leak part in the vacuum heat insulating panel 1, there is no helium gas in the closed chamber 9, and the detection result is “no helium”. Further, if there is a leak portion in the vacuum heat insulating panel 1, helium gas exists in the closed chamber 9 and the detection result is “with helium”. Therefore, products are selected based on the presence or absence of these helium gases. When the leak inspection is finished,
After returning the atmospheric pressure to the closed chamber 9, the closed chamber 9 is opened and the vacuum heat insulating panel 1 is taken out. Then, by applying pressure from the outside of the vacuum heat insulating panel 1, the sealing portion 5a of the glass container 5 is broken as shown by the chain double-dashed line in FIG. As a result, the glass container 5 is opened into the heat insulating material 4b, and a product in a form in which the filler 6 is mixed in the heat insulating material 4b is manufactured.
【００１８】上記実施例によれば、断熱材４ｂには若干
量の水分が含まれており、例えば、断熱材４ｂの含有水
分率を１ｗｔ％，充填量を２００ｇとすると、外装体２
内にある残留水分量は、２００ｇ×１ｗｔ％＝２ｇとな
り、この２ｇの水分は水蒸気量に換算すると、（２／１
８）×２２４００＝２４９０ｃｃ（但し、０°Ｃ，７６
０ｍｍＨｇ）にも達する。しかしながら、予め脱水され
た吸着剤６が断熱材４ｂに混入されているため、外装体
２内の水分が吸着剤６により吸着され、外装体２内の圧
力上昇が抑止される。従って、外装体２内の真空度が劣
化することを防止でき、その結果、断熱性能の低下も防
止できる。According to the above-described embodiment, the heat insulating material 4b contains a small amount of water. For example, when the moisture content of the heat insulating material 4b is 1 wt% and the filling amount is 200 g, the outer package 2 is formed.
The amount of residual water inside is 200 g × 1 wt% = 2 g, and when this 2 g of water is converted to the amount of water vapor, it becomes (2/1
8) × 22400 = 2490 cc (however, 0 ° C., 76
It reaches 0 mmHg). However, since the adsorbent 6 that has been dehydrated in advance is mixed in the heat insulating material 4b, the moisture in the exterior body 2 is adsorbed by the adsorbent 6 and the pressure increase in the exterior body 2 is suppressed. Therefore, it is possible to prevent the degree of vacuum in the exterior body 2 from being deteriorated, and as a result, it is also possible to prevent deterioration of the heat insulating performance.
【００１９】ところで、真空断熱パネル１を製造するに
あたっては、吸着剤６を内袋４ａに直接投入することが
考えられるが、この場合、投入時に吸着剤６が水分を吸
着してしまい、その吸着能力が低下する虞れがある。こ
の点本実施例では、脱水化された吸着剤６を容器５内に
密閉且つ真空状態で充填し、この容器５を外装体２内に
収容した後容器５を破壊するようにしたので、吸着剤６
は、水分を吸着していない状態で外装体２内に収容され
ることになる。その結果、水分が効果的に吸着されるよ
うになり、ひいては、断熱性能の低下をより確実に防止
できる。In the meantime, when manufacturing the vacuum heat insulating panel 1, it is considered that the adsorbent 6 is directly charged into the inner bag 4a. In this case, however, the adsorbent 6 adsorbs moisture at the time of charging, and the adsorption There is a risk that the ability will decrease. In this regard, in this embodiment, the dehydrated adsorbent 6 is filled in the container 5 in a closed and vacuum state, the container 5 is housed in the exterior body 2, and then the container 5 is destroyed. Agent 6
Will be accommodated in the exterior body 2 in a state in which moisture is not adsorbed. As a result, the moisture is effectively absorbed, and as a result, the deterioration of the heat insulating performance can be prevented more reliably.
【００２０】また、冷蔵庫に適用される真空断熱パネル
１においては、必要な断熱性能を維持するため、真空断
熱パネル１内の圧力を次のように維持することが好まし
い。 製造時……１Ｔｏｒｒ以下，１０年経過後…５Ｔｏｒｒ
以下 ここで、外装体２の内容積を１０００ｃｃ，断熱材４ｂ
の充填率を８０％とすると、外装体２の空間容積は２０
０ｃｃになる。従って、外装体２内の残留気体量は、 製造時…２００×（１／７６０）＝０．２６ｃｃ １０年経過後…２００×（５／７６０）＝１．３ｃｃ 上記２つの気体量から許容リーク量を計算すると、
（１．３−０．２６）／１０年＝３×１０−９ｃｃ／ｓ
ｅｃになる。従来では、このような小さなリークを、真
空容器中に収容した真空断熱パネル１の変形量から検査
するようにしていたため、検査を行い難いという事情が
あった。この点、本実施例では、ヘリウムリークテスト
により真空断熱パネル１のリーク検査を行うようにした
ので、小さなリークであっても簡単確実に発見すること
ができる。Further, in the vacuum heat insulation panel 1 applied to the refrigerator, in order to maintain the necessary heat insulation performance, it is preferable to maintain the pressure in the vacuum heat insulation panel 1 as follows. During manufacturing: 1 Torr or less, after 10 years: 5 Torr
Hereafter, the internal volume of the exterior body 2 is 1000 cc, and the heat insulating material 4b
If the filling rate is 80%, the space volume of the exterior body 2 is 20%.
It becomes 0cc. Therefore, the amount of residual gas in the outer package 2 is as follows: 200 × (1/760) = 0.26 cc at the time of manufacture ... 200 × (5/760) = 1.3 cc after 10 years have passed. Calculating the amount,
(1.3−0.26) / 10 years = 3 × 10 −9 cc / s
It becomes ec. Conventionally, such a small leak is inspected based on the deformation amount of the vacuum heat insulating panel 1 housed in the vacuum container, which makes it difficult to inspect. In this respect, in the present embodiment, the helium leak test is used to perform the leak inspection of the vacuum heat insulating panel 1, so that even a small leak can be easily and surely found.
【００２１】尚、上記実施例においては、所定量の吸着
剤６を１個の容器５内に充填する構成としたが、複数の
容器５内に分割して充填するようにしても良い。また、
上記実施例においては、吸着剤６としてモレキュラシー
ブスを用いたが、これに限定されるものではなく、例え
ばシリカゲル等であっても良いが、吸着剤６の充填量を
少なくして断熱材の充填量を多くするといった点から、
極力粒子径の小さなものを用いて吸着剤６の充填率を小
さくすることが好ましい。また、上記実施例において
は、本発明を冷蔵庫の真空断熱パネル１に適用したが、
これに限定されるものではなく、他の断熱体に広く適用
して実施することができる。Although a predetermined amount of the adsorbent 6 is filled in one container 5 in the above embodiment, the adsorbent 6 may be filled in a plurality of containers 5 separately. Also,
In the above embodiment, molecular sieves were used as the adsorbent 6, but the adsorbent 6 is not limited to this, and silica gel or the like may be used. In terms of increasing the amount,
It is preferable to reduce the filling rate of the adsorbent 6 by using particles having a particle size as small as possible. Further, in the above embodiment, the present invention is applied to the vacuum heat insulation panel 1 of the refrigerator,
The present invention is not limited to this and can be widely applied to other heat insulators.
【００２２】[0022]
【発明の効果】以上の説明から明らかなように、本発明
によれば次のような優れた効果を奏する。請求項１記載
の断熱体によれば、脱水された吸着剤が断熱材に混入さ
れているため、外装体内の圧力上昇を抑止することがで
きる。従って、外装体内の真空度が劣化することを防止
でき、その結果、断熱性能の低下も防止できる。請求項
２記載の断熱体の製造方法によれば、水分を吸着してい
ない状態の吸着剤を外装体内に収容することができるの
で、外装体内の水分が効果的に吸着されるようになり、
その結果、断熱性能の低下をより確実に防止できる。As is apparent from the above description, the present invention has the following excellent effects. According to the heat insulator of the first aspect, since the dehydrated adsorbent is mixed in the heat insulator, it is possible to suppress the pressure increase in the exterior body. Therefore, it is possible to prevent the degree of vacuum in the exterior body from being deteriorated, and as a result, it is possible to prevent deterioration of the heat insulating performance. According to the method for manufacturing a heat insulator of claim 2, since the adsorbent in a state in which moisture is not adsorbed can be accommodated in the outer package, the moisture in the outer package can be effectively absorbed.
As a result, it is possible to more reliably prevent a decrease in heat insulation performance.
【図１】本発明の一実施例を示す真空断熱パネルの断面
図FIG. 1 is a sectional view of a vacuum heat insulating panel showing an embodiment of the present invention.
【図２】真空断熱パネルの製造方法を説明するための図FIG. 2 is a diagram for explaining a method for manufacturing a vacuum heat insulating panel.
【図３】真空断熱パネルの製造装置およびリーク検査装
置を概略的に示す図FIG. 3 is a diagram schematically showing a vacuum insulation panel manufacturing apparatus and a leak inspection apparatus.
１は真空断熱パネル、２は外装体、４ｂは断熱材、５は
容器、６は吸着剤を示す。1 is a vacuum heat insulation panel, 2 is an exterior body, 4b is a heat insulating material, 5 is a container, and 6 is an adsorbent.
Claims (2)
内に真空且つ気密状態で充填された断熱材とを備えたも
のにおいて、前記断熱材には、予め脱水された水分を吸
着するための吸着剤が混入されていることを特徴とする
真空断熱体。1. A non-breathable exterior body, and a heat insulating material filled in the exterior body in a vacuum and airtight state, wherein the heat insulating material adsorbs dehydrated water in advance. A vacuum heat insulator characterized by being mixed with the adsorbent of.
方法において、 脱水化された吸着剤を容器内に真空且つ気密状態で充填
する工程と、 吸着剤が収容された容器および断熱材を外装体内に真空
且つ気密状態で充填する工程と、 前記容器を破壊して前記断熱材に前記吸着剤を混入する
工程とを備えてなる真空断熱体の製造方法。2. A method for manufacturing a heat insulator according to claim 1, wherein a dehydrated adsorbent is filled in a container in a vacuum and airtight state, a container containing the adsorbent and a heat insulating material. A method of manufacturing a vacuum heat insulating body, comprising: a step of filling the outer package in a vacuum and airtight state; and a step of destroying the container and mixing the adsorbent with the heat insulating material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6061297A JPH07269780A (en) | 1994-03-30 | 1994-03-30 | Vacuum heat insulating body and manufacture thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6061297A JPH07269780A (en) | 1994-03-30 | 1994-03-30 | Vacuum heat insulating body and manufacture thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07269780A true JPH07269780A (en) | 1995-10-20 |
Family
ID=13167125
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6061297A Pending JPH07269780A (en) | 1994-03-30 | 1994-03-30 | Vacuum heat insulating body and manufacture thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07269780A (en) |
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| JP2003065490A (en) * | 2001-08-29 | 2003-03-05 | Zojirushi Corp | Method of manufacturing heat insulator |
| JP2007162824A (en) * | 2005-12-14 | 2007-06-28 | Matsushita Electric Ind Co Ltd | Vacuum heat insulation material, and heat insulation box using vacuum heat insulation material |
| WO2010029730A1 (en) * | 2008-09-10 | 2010-03-18 | パナソニック株式会社 | Vacuum heat insulation material and manufacturing method therefor |
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1994
- 1994-03-30 JP JP6061297A patent/JPH07269780A/en active Pending
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| JP2011153713A (en) * | 1998-09-30 | 2011-08-11 | Cabot Corp | Vacuum heat insulation panel and method of manufacturing the same |
| JP2003065490A (en) * | 2001-08-29 | 2003-03-05 | Zojirushi Corp | Method of manufacturing heat insulator |
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| WO2010029730A1 (en) * | 2008-09-10 | 2010-03-18 | パナソニック株式会社 | Vacuum heat insulation material and manufacturing method therefor |
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| CN103370120A (en) * | 2011-02-14 | 2013-10-23 | 松下电器产业株式会社 | Gas adsorption device and vacuum heat insulating material provided therewith |
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| JP2017198324A (en) * | 2016-04-28 | 2017-11-02 | 三星電子株式会社Ｓａｍｓｕｎｇ Ｅｌｅｃｔｒｏｎｉｃｓ Ｃｏ．，Ｌｔｄ． | Heat insulation material, vacuum heat insulation material, method for manufacturing the same, and refrigerator including the same |
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