GB2162441A - A composite structure, and method of forming same, and rotary element which comprises such a structure for air treatment apparatus - Google Patents

A composite structure, and method of forming same, and rotary element which comprises such a structure for air treatment apparatus Download PDF

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Publication number
GB2162441A
GB2162441A GB08515277A GB8515277A GB2162441A GB 2162441 A GB2162441 A GB 2162441A GB 08515277 A GB08515277 A GB 08515277A GB 8515277 A GB8515277 A GB 8515277A GB 2162441 A GB2162441 A GB 2162441A
Authority
GB
United Kingdom
Prior art keywords
substrate
rotary element
coating
adsorbent
composite structure
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.)
Withdrawn
Application number
GB08515277A
Other versions
GB8515277D0 (en
Inventor
Erling Berner
Makoto Takeshita
Hitoshi Sekiya
Taizoh Gotoh
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BERNER INT CO Ltd
Sumikei Aluminum Foil Co Ltd
Original Assignee
BERNER INT CO Ltd
Sumikei Aluminum Foil Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by BERNER INT CO Ltd, Sumikei Aluminum Foil Co Ltd filed Critical BERNER INT CO Ltd
Publication of GB8515277D0 publication Critical patent/GB8515277D0/en
Publication of GB2162441A publication Critical patent/GB2162441A/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
    • B01D53/06—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with moving adsorbents, e.g. rotating beds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/10—Inorganic adsorbents
    • B01D2253/106—Silica or silicates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/25—Coated, impregnated or composite adsorbents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/80—Water
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/26—Drying gases or vapours
    • B01D53/261—Drying gases or vapours by adsorption
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2203/00—Devices or apparatus used for air treatment
    • F24F2203/10—Rotary wheel
    • F24F2203/1032—Desiccant wheel
    • F24F2203/1036—Details

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Drying Of Gases (AREA)

Abstract

A composite structure, and method of forming same by enlarging its heat exchanging area, for use in fabricating an element for air treatment apparatus. The structure may include a substrate having irregular surface contours and a coating of an adsorbent composition overlying the substrate. <IMAGE>

Description

SPECIFICATION A composite structure, and method for forming same, and rotary element which comprises such a structure for air treatment apparatus This invention relates to a composite structure for use in fabricating a rotary element for air treatment apparatus and a method for forming the same.
Rotary elements for use in air treatment apparatus are well known. When the air treatment apparatus requires only a heat exchange device, the rotary element typically is formed of a thin metal base, such as aluminum foil, in a honeycomb structure to provide rigidity in the resultant structure. When it is desired to dry or otherwise control the humidity of air passing through the rotary element, the aluminum base may be coated with an adsorbent composition, such as silica gel, alumina, aluminum hydroxide and the like, which adsorbs moisture in the air.
One of the problems associated with adsorbent-coated rotary elements is that they often are ineffective when used at high levels of humidity in that condensate forms within the rotary element; the condensate tends to trap dust in the air with the result that the rotary element becomes clogged.
Theoretically it is possible to improve the efficiency of the rotary element by increasing the thickness of the adsorbent coating, but this measure tends to increase the static pressure loss of the air flowing through the rotary element. Further, as the adsordent coating increases in thickness, there is a greater tendency for the coating to peel away from the base or substrate material and thereby clog the rotary element.
The present invention overcomes the aforementioned problems associated with known adsorbent-coated rotary elements without any adverse effect on the static loss properties of the rotary element. In addition and surprisingly, the strength properties of the adsorbentcoated structure are improved by the present invention, thereby effecting cost savings because thinner substrate material may be used.
The present invention provides a composite structure for use in fabricating a rotary element for air treatment apparatus comprising: an embossed substrate defining irregular surface contours and being capable of receiving an adherent coating of an adsorbent composition; and a coating of an adsorbent composition overlying the substrate, the coating conforming to the irregular surface contours of the substrate. Preferably the substrate is aluminum foil and the adsorbent composition is silica gel.
The present invention also provides a method of forming a composite structure for use in fabricating a rotary element for air treatment apparatus comprising the steps of: embossing a substrate to provide the substrate with irregular surface contours; and depositing on the substrate an adsorbent composition.
Other details and advanages of the present invention will become apparent from the following detailed description taken with the accompanying drawings, in which: The Figure is an enlarged sectional view of the composite structure of the present invention.
Referring to the drawings, composite structure 10 is formed by first providing a flat piece of a substrate material 12 made of either organic or inorganic substances. Preferably substrate 12 is aluminum foil. The aluminum foil substrate 12 is first subjected to a well-known embossing operation whereby indentations are systematically formed in the surface by stamping to form the irregular surface contours shown in the Figure. After the embossing operation, the surface area of substrate 12 will have increased about 20 to 30%.
Next, embossed substrate 12 is coated with an adsorbent composition 14, such as silica gel, by any well-known deposition technique.
Because the surface area of substrate 12 was increased by the embossing step, the thickness of the adsorbent coating can be controlled to a minimum while maintaining an effective amount of adsorbent. Thus, the resultant composite structure does not increase the static loss of the air flowing through a honeycomb structure formed from the composite of the present invention.
Surprisingly, it has been found that the compressive strength in the direction of air flow through a honeycomb element made from a 30 micron thick piece of the structure of the present invention is equivalent to that of a flat adsorbent-coated structure 40 microns thick. This increase in strength thus affords the opportunity to use thinner aluminum foils with corresponding cost savings.
A rotary element formed of the composite structure of the present invention can increase the amount of adsorbent coating compared with flat coated structures while maintaining the adhesion of the adsorbent on the irregularly contoured surface, thereby enhancing the latent heat efficiency of the rotary element without increasing the static loss of the air flow passing through the element.
1. A composite structure for use in fabricating a rotary element for air treatment apparatus, comprising: an embossed substrate defining irregular surface contours and being capable of receiving an adherent coating of an absorbent comprosition; and a coating of an adsorbent composition overlying said substrate, said coating conforming to said irregu
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (11)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION A composite structure, and method for forming same, and rotary element which comprises such a structure for air treatment apparatus This invention relates to a composite structure for use in fabricating a rotary element for air treatment apparatus and a method for forming the same. Rotary elements for use in air treatment apparatus are well known. When the air treatment apparatus requires only a heat exchange device, the rotary element typically is formed of a thin metal base, such as aluminum foil, in a honeycomb structure to provide rigidity in the resultant structure. When it is desired to dry or otherwise control the humidity of air passing through the rotary element, the aluminum base may be coated with an adsorbent composition, such as silica gel, alumina, aluminum hydroxide and the like, which adsorbs moisture in the air. One of the problems associated with adsorbent-coated rotary elements is that they often are ineffective when used at high levels of humidity in that condensate forms within the rotary element; the condensate tends to trap dust in the air with the result that the rotary element becomes clogged. Theoretically it is possible to improve the efficiency of the rotary element by increasing the thickness of the adsorbent coating, but this measure tends to increase the static pressure loss of the air flowing through the rotary element. Further, as the adsordent coating increases in thickness, there is a greater tendency for the coating to peel away from the base or substrate material and thereby clog the rotary element. The present invention overcomes the aforementioned problems associated with known adsorbent-coated rotary elements without any adverse effect on the static loss properties of the rotary element. In addition and surprisingly, the strength properties of the adsorbentcoated structure are improved by the present invention, thereby effecting cost savings because thinner substrate material may be used. The present invention provides a composite structure for use in fabricating a rotary element for air treatment apparatus comprising: an embossed substrate defining irregular surface contours and being capable of receiving an adherent coating of an adsorbent composition; and a coating of an adsorbent composition overlying the substrate, the coating conforming to the irregular surface contours of the substrate. Preferably the substrate is aluminum foil and the adsorbent composition is silica gel. The present invention also provides a method of forming a composite structure for use in fabricating a rotary element for air treatment apparatus comprising the steps of: embossing a substrate to provide the substrate with irregular surface contours; and depositing on the substrate an adsorbent composition. Other details and advanages of the present invention will become apparent from the following detailed description taken with the accompanying drawings, in which: The Figure is an enlarged sectional view of the composite structure of the present invention. Referring to the drawings, composite structure 10 is formed by first providing a flat piece of a substrate material 12 made of either organic or inorganic substances. Preferably substrate 12 is aluminum foil. The aluminum foil substrate 12 is first subjected to a well-known embossing operation whereby indentations are systematically formed in the surface by stamping to form the irregular surface contours shown in the Figure. After the embossing operation, the surface area of substrate 12 will have increased about 20 to 30%. Next, embossed substrate 12 is coated with an adsorbent composition 14, such as silica gel, by any well-known deposition technique. Because the surface area of substrate 12 was increased by the embossing step, the thickness of the adsorbent coating can be controlled to a minimum while maintaining an effective amount of adsorbent. Thus, the resultant composite structure does not increase the static loss of the air flowing through a honeycomb structure formed from the composite of the present invention. Surprisingly, it has been found that the compressive strength in the direction of air flow through a honeycomb element made from a 30 micron thick piece of the structure of the present invention is equivalent to that of a flat adsorbent-coated structure 40 microns thick. This increase in strength thus affords the opportunity to use thinner aluminum foils with corresponding cost savings. A rotary element formed of the composite structure of the present invention can increase the amount of adsorbent coating compared with flat coated structures while maintaining the adhesion of the adsorbent on the irregularly contoured surface, thereby enhancing the latent heat efficiency of the rotary element without increasing the static loss of the air flow passing through the element. CLAIMS 1. A composite structure for use in fabricating a rotary element for air treatment apparatus, comprising: an embossed substrate defining irregular surface contours and being capable of receiving an adherent coating of an absorbent comprosition; and a coating of an adsorbent composition overlying said substrate, said coating conforming to said irregu lar surface contours of said substrate. 2. A structure as recited in Claim 1 wherein: said substrate is aluminium foil and said adsorbent composition is silica gel. 3. A composite structure substantially as hereinbefore described with reference to, and as illustrated in, the accompanying drawing. 4. A rotary element for air treatment apparatus, incorporating the composite structure according to claim 1, 2 or 3. 5. A method of forming a composite structure for use in fabricating a rotary element for air treatment apparatus, comprising the steps of: embossing a substance to provide said substrate with irregular surface contours; and depositing on said substrate an adherent coating of an adsorbent composition. 6. A method as recited in claim 5 wherein: said substrate is aluminium foil and said adsorbent composition is silica gel. 7. A method of forming a composite structure, substantially as hereinbefore described with reference to the accompanying drawing. CLAIMS Amendments to the claims have been filed, and have the following effect: Claims 1 to 7 above have been deleted or textually amended. New or textually amended claims have been filed as follows:
1. A structure for use in fabricating an element for air treatment apparatus, comprising: an embossed substrate defining irregular surface contours, whereby the compressive strength of said element is increased in the direction of air flow therethrough.
2. A structure as recited in claim 1, wherein said substrate is capable of receiving an adherent coating of an absorbent composition; and further including such a coating of an adsorbent composition overlying said substrate and conforming to said irregular surface contours thereof.
3. A structure as recited in claim 2 wherein: said substrate is aluminium foil and said adsorbent coating is silica gel.
4. A structure as recited in claim 2 or 3, and further including a moisture-absorbent composition present on said coating.
5. A composite structure substantially as hereinbefore described with reference to, and as illustrated in, the accompanying drawing.
6. A rotary element for air treatment apparatus, incorporating the composite structure according to claim 1, 2 or 3.
7. A method of forming a structure for use in fabricating an element for air treatment apparatus, comprising the step of embossing a substance to provide said substrate with irregular surface contours.
8. A method as recited in claim 7, and further comprising the step of depositing on said substrate an adherent coating of an adsorbent composition.
9. A method as recited in claim 8, and further comprising the step of adding a moisture-absorbing composition to said coating.
10. A method as recited in claim 8 or 9, wherein: said substrate is aluminium foil and said adsorbent composition is silica gel.
11. A method of forming a composite structure, substantially as hereinbefore described with reference to the accompanying drawing.
GB08515277A 1984-06-18 1985-06-17 A composite structure, and method of forming same, and rotary element which comprises such a structure for air treatment apparatus Withdrawn GB2162441A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12380984A JPS613994A (en) 1984-06-18 1984-06-18 Rotary element for total heat exchanger and/or dehumidifier

Publications (2)

Publication Number Publication Date
GB8515277D0 GB8515277D0 (en) 1985-07-17
GB2162441A true GB2162441A (en) 1986-02-05

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Family Applications (1)

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GB08515277A Withdrawn GB2162441A (en) 1984-06-18 1985-06-17 A composite structure, and method of forming same, and rotary element which comprises such a structure for air treatment apparatus

Country Status (6)

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JP (1) JPS613994A (en)
DE (1) DE3521696A1 (en)
FR (1) FR2565900B1 (en)
GB (1) GB2162441A (en)
NL (1) NL8501736A (en)
SE (1) SE8502994L (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4769053A (en) * 1987-03-26 1988-09-06 Semco Mfg., Inc. High efficiency sensible and latent heat exchange media with selected transfer for a total energy recovery wheel
JP6878698B2 (en) * 2018-06-27 2021-06-02 三菱電機株式会社 Heat exchanger and refrigeration cycle equipment

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB953207A (en) * 1959-07-10 1964-03-25 Munters Carl Georg Body for transfer of vapour and/or heat
GB1040061A (en) * 1962-01-30 1966-08-24 Munters Carl Georg Improvements in or relating to method of manufacturing exchanger packings and exchanger packings manufactured according to said method
GB1140042A (en) * 1965-03-02 1969-01-15 Munters Carl Georg A method for the manufacture of an exchanger packing intended for the exchange of heat and/or moisture between two fluids one at least of which is a gas
GB1478604A (en) * 1975-01-30 1977-07-06 Svenska Flaektfabriken Ab Combined heat and humidity exchange apparatus
GB1567239A (en) * 1976-05-13 1980-05-14 Munters Ab Carl Rotor for moisture and/or heat exchangers as well as method and apparatus for manufacture thereof
GB1581262A (en) * 1976-07-21 1980-12-10 Munters Ab Carl Rotor for regenerative moisture and/or heat exchanger

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH619622A5 (en) * 1978-01-20 1980-10-15 Pierre De Castella
JPS58198696A (en) * 1982-05-12 1983-11-18 Matsushita Electric Ind Co Ltd Heat exchange element

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB953207A (en) * 1959-07-10 1964-03-25 Munters Carl Georg Body for transfer of vapour and/or heat
GB1040061A (en) * 1962-01-30 1966-08-24 Munters Carl Georg Improvements in or relating to method of manufacturing exchanger packings and exchanger packings manufactured according to said method
GB1140042A (en) * 1965-03-02 1969-01-15 Munters Carl Georg A method for the manufacture of an exchanger packing intended for the exchange of heat and/or moisture between two fluids one at least of which is a gas
GB1478604A (en) * 1975-01-30 1977-07-06 Svenska Flaektfabriken Ab Combined heat and humidity exchange apparatus
GB1567239A (en) * 1976-05-13 1980-05-14 Munters Ab Carl Rotor for moisture and/or heat exchangers as well as method and apparatus for manufacture thereof
GB1581262A (en) * 1976-07-21 1980-12-10 Munters Ab Carl Rotor for regenerative moisture and/or heat exchanger

Also Published As

Publication number Publication date
DE3521696A1 (en) 1986-01-09
SE8502994D0 (en) 1985-06-17
GB8515277D0 (en) 1985-07-17
FR2565900B1 (en) 1989-03-31
FR2565900A1 (en) 1985-12-20
JPH059720B2 (en) 1993-02-05
NL8501736A (en) 1986-01-16
SE8502994L (en) 1985-12-19
JPS613994A (en) 1986-01-09

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