1. An insulator comprising:
a core material that retains a space;
a sheath material that has a gas barrier ability and encloses the core material therein in a decompressed and closed state; and
a gas adsorbent enclosed in the sheath material together with the core material, wherein
the gas adsorbent is a copper ion-exchanged ZSM-5 type zeolite compact which contains ZSM-5 type zeolite subjected to copper ion exchange and which is molded in such a manner that the density of the zeolite is higher than the density of the core material decompressed and sealed in the sheath material.
2. The insulator according to claim 1, wherein
the molding density of the ZSM-5 type zeolite in the gas adsorbent, which is subjected to copper ion exchange, is in a range of 0.9 to 1.4 gcm3.
3. The insulator according to claim 1, wherein
a nitrogen adsorption capacity of the gas adsorbent is 10 cm3g or more at normal temperature and normal pressure.
4. The insulator according to claim 1, wherein
the insulator includes as the gas adsorbent a sub-gas adsorbent that is used in combination with the copper ion-exchanged ZSM-5 type zeolite compact, and
the sub-gas adsorbent does not contain the copper ion-exchanged ZSM-5 type zeolite and is capable of adsorbing at least one of moisture and oxygen.
5. The insulator according to claim 4, wherein
in the gas adsorbent, the surface of at least a part of the copper ion-exchanged ZSM-5 type zeolite compact is covered with the sub-gas adsorbent.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
What is claimed is:
1. A projection apparatus comprising:
an optical unit for magnifying and projecting an image by using light of a light source,
reflecting means for reflecting said projected image from said optical unit, and
a screen projected with said projected image from said reflecting means from its rear surface, wherein:
said projection apparatus further includes a housing containing said light source and having a plurality of surfaces, and air exhausting means for discharging interior heat of said housing, and
at least one of air outlets is respectively provided on a plurality of surfaces of said housing on different surfaces from each other.
2. A projection apparatus as claimed in claim 1, wherein at least one of said air outlets is provided on a bottom surface side of said housing so as to form said passage of heat between an arrangement surface and a bottom surface when said housing is arranged.
3. A projection apparatus as claimed in claim 2, wherein at least one of said air outlets being provided on a rear surface side of said housing.
4. A projection apparatus as claimed in claim 1, wherein said air outlets include a first air outlet provided on a first surface out of a plurality of surfaces of said housing, and a second air outlet provided on a second surface except said first surface of said housing.
5. A cooling method of the projection apparatus which comprises:
an optical unit for magnifying and projecting an image by using light of a light source,
reflecting means for reflecting said projected image from said optical unit, and
a screen projected with said projected image from said reflecting means from its rear surface, wherein:
said projection apparatus further includes a housing containing said light source and having a plurality of surfaces, and air exhausting means for discharging interior heat of said housing, and
at least one of air outlets is respectively provided on a plurality of surfaces of said housing on different surfaces from each other.
6. A cooling method of the projection apparatus as claimed in claim 5, wherein at least one of said air outlets is provided on a bottom surface side of said housing so as to form said passage of heat between an arrangement surface and a bottom surface when said housing is arranged.
7. A cooling method of the projection apparatus as claimed in claim 6, wherein at least one of said air outlets being provided on a rear surface side of said housing.
8. A cooling method of the projection apparatus as claimed in claim 7, wherein said air outlets include a first air outlet provided on a first surface out of a plurality of surfaces of said housing, and a second air outlet provided on a second surface except said first surface of said housing.