[특허]Solar collector comprising transparent hollow plastic microspheres as insulation material

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특허 상세정보

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내보내기 페이스북 공유 트위터 공유 카카오톡 공유

Solar collector comprising transparent hollow plastic microspheres as insulation material

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F24J-003/02
미국특허분류(USC)	126/443; 126/450
출원번호	US-0428923 (1982-09-30)
발명자 / 주소	Torobin, Leonard B.
대리인 / 주소	Carvellas, Perry
인용정보	피인용 횟수 : 67 인용 특허 : 10

초록
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The hollow plastic microspheres 17 are made by forming a liquid film of thermoplastic or thermosetting plastic composition across a coaxial blowing nozzle 5, applying a blowing gas 10 at a positive pressure to the inner surface of the plastic film to blow the film and form an elongated cylinder shaped liquid film 12 of plastic. A transverse jet 13 is used to direct an entraining fluid 14 over and around the blowing nozzle 5, at an angle to the axis of the blowing nozzle. The entraining fluid 14 as it passes over and around the blowing nozzle 5 fluid dynamically induces a pulsating or fluctuating pressure field at the opposite or lee side of the blowing nozzle in the wake or shadow of the coaxial blowing nozzle. The continued movement of the entraining fluid 14 over the elongated cylinder 12 produces asymmetric fluid drag forces on the cylinder and closes and detaches the elongated cylinder from the coaxial blowing nozzle and the detached cylinder by the action of surface tension forms into a spherical shape 17. The hollow plastic microspheres can be made from low heat conductivity plastic compositions and blown with a low heat conductivity gas and used to make improved insulation materials and composites and insulating systems. The hollow plastic microspheres 17 can be made to contain a thin transparent or reflective metal coating 20 deposited on the inner wall surface of the microspheres.

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1. A solar energy collector comprising an outer transparent cover and an inner cover, and having disposed there-between a black coated heat absorber and at least one heat exchange medium tube, wherein said outer cover consists of a transparent sheet comprising a mass of hollow plastic microspheres or a transparent panel comprising a mass of hollow plastic microspheres, wherein the microspheres in said sheet or panel are cemented together by fusion or sintering or bonded together with an organic or inorganic bonding agent or adhesive, said microspheres being of substantially uniform diameter of 500 to 6,000 microns and of substantially uniform wall thickness of 0.5 to 400 microns and said microspheres are free of latent solid or liquid blowing gas materials or gases and the walls of said microspheres are substantially free of holes, relatively thinned wall portions or sections and bubbles. 2. The solar energy collector of claim 1 wherein the microspheres in said sheet or the microspheres in said panel have deposited on the inner wall surface of the microspheres a thin metal coating. 3. The solar energy collector of claim 1 wherein the microspheres in said sheet or the microspheres in said panel contain a low heat conductivity gas. 4. The solar energy collector of claim 2 wherein the metal deposited on the inner wall surfaces of the microspheres is less than 100 .ANG. thick and is transparent to visible light. 5. The solar energy collector of claim 1 wherein the microspheres in said sheet or the microspheres in said panel have an oblate spheriod shape. 6. The solar energy collector of claim 1 wherein the microspheres in said sheet or the microspheres in said panel have deposited on the inner wall surfaces of said microspheres a thin metal transparent coating 25 to 95 .ANG. thick. 7. A solar energy collector comprising an outer transparent cover and an inner cover, and having disposed there-between a black coated heat absorber and at least one heat exchange medium tube, wherein said outer cover consists of a transparent sheet comprising a mass of hollow plastic microspheres or a transparent panel comprising a mass of hollow plastic microspheres, wherein the microspheres in said sheet or panel are cemented together by fusion or sintering or bonded together with an organic or inorganic bonding agent or adhesive, said microspheres being filamented microspheres having a diameter of 500 to 6,000 microns and having a wall thickness of 0.5 to 400 microns, said microspheres are free of latent solid or liquid blowing gas materials or gases and the walls of said microspheres are substantially free of holes, relatively thinned wall portions or sections and bubbles, and said microspheres are connected to each other by filament portions which are continuous with the microspheres and are of the same organic film forming material from which the microspheres are made. 8. The solar energy collector of claim 7 wherein the microspheres in said sheet or the microspheres in said panel have deposited on the inner wall surfaces thereof a thin metal coating. 9. The solar collector of claim 7 wherein the microspheres in said sheet or the microspheres in said panel contain a low heat conductivity gas. 10. The solar energy collector of claim 8 wherein the metal deposited on the inner wall surfaces of the microspheres is less than 100 .ANG. thick and transparent to visible light. 11. The solar energy collector of claim 7 wherein the microspheres in said sheet or the microspheres in said panel have an oblate spheroid shape. 12. The solar energy collector of claim 7 wherein the length of the connecting filaments connecting the microspheres in said sheet or the microspheres in said panel is substantially equal and is 2 to 20 times the diameter of the microspheres. 13. The solar energy collector of claim 7 wherein the length of the connecting filaments connecting the microspheres in said sheet or the microspheres in said panel is substantially equal and the diameter of the connecting filament is 1/2500 to 1/20 the diameter of the microspheres. 14. A solar energy collector comprising an outer transparent cover and an inner cover, and having disposed there-between a black coated heat absorber and at least one heat exchange medium tube, wherein there is disposed between said outer cover and said black coated heat absorber a first mass of transparent hollow plastic microspheres, and there is disposed between said black coated heat absorber tubes and said inner cover a second mass of hollow plastic microspheres, said first and second masses of hollow plastic microspheres being of substantially uniform diameter of 500 to 6,000 microns and of substantially uniform wall thickness of 0.5 to 400 microns and said microspheres are free of latent solid or liquid blowing gas materials or gases and the walls of said microspheres are substantially free of holes, relatively thinned wall portions or sections and bubbles. 15. The solar energy collector of claim 14 wherein said microspheres have deposited on the inner wall surfaces thereof a thin metal coating. 16. The solar energy collector of claim 14 wherein said microspheres contain a low heat conductivity gas. 17. The solar energy collector of claim 14 wherein said first mass of microspheres have deposited on the inner wall surfaces thereof a metal coating less than 100 .ANG. thick and transparent to visible light. 18. The solar energy collector of claim 14 wherein said second mass of microspheres have deposited on the inner wall surfaces thereof a metal coating more then 100 .ANG. thick and reflective of visible light. 19. The solar energy collector of claim 14 wherein said microspheres have an oblate spheriod shape. 20. The solar energy collector of claim 14 wherein said first and second masses of microspheres have deposited on the inner wall surfaces of the microspheres a thin metal transparent coating 25 to 95 .ANG. thick. 21. The solar energy collector of claim 14 wherein said second mass of microspheres have deposited on the inner wall surfaces thereof a thin metal reflective coating 105 to 600 .ANG. thick. 22. A solar energy collector comprising an outer transparent cover and an inner cover, and having disposed there-between a black coated heat absorber and at least one heat exchange medium tube, wherein there is disposed between said outer cover and said black coated heat absorber a first mass of transparent hollow plastic microspheres, and there is disposed between said black coated heat absorber tubes and said inner cover a second mass of hollow plastic microspheres, said first and second masses of hollow plastic microspheres being filamented microspheres having a diameter of 500 to 6,000 microns and having a wall thickness of 0.5 to 400 microns and said microspheres are connected to each other by filament portions which are continuous with the microspheres and are of the same organic film forming material from which the microspheres are made. 23. The solar energy collector of claim 22 wherein said microspheres have deposited on the inner wall surfaces thereof a thin metal coating. 24. The solar energy collector of claim 22 wherein said microspheres contain a low heat conductivity gas. 25. The solar energy collector of claim 22 wherein said first mass of microspheres have deposited on the inner wall surface thereof a metal coating less than 100 .ANG. thick and transparent to visible light. 26. The solar energy collector of claim 22 wherein said second mass of microspheres have deposited on the inner wall surfaces thereof a metal coating more than 100 .ANG. thick and reflective of visible light. 27. The solar energy collector of claim 22 wherein said microspheres have an oblate spheroid shape. 28. The solar energy collector of claim 22 wherein said first and second masses of microspheres have deposited on the inner wall surfaces of the microspheres a thin metal transparent coating 25 to 95 .ANG. thick. 29. The solar energy collector of claim 22 wherein the length of the connecting filaments connecting said microspheres is substantially equal and is 2 to 20 times the diameter of the microspheres. 30. The solar energy collector of claim 22 wherein the length of the connecting filaments connecting said microspheres is substantially equal and the diameter of the connecting filament is 1/2500 to 1/20 the diameter of the microspheres.

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Solar collector comprising transparent hollow plastic microspheres as insulation material

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Solar collector comprising transparent hollow plastic microspheres as insulation material

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