# US 5,216,224 A · Window with an improved parietodynamic effect

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- Number: US 5,216,224 A
- Document ID: US5216224A
- Status: Granted
- Kind: A
- Application number: 07/658,583
- Filed: 1991-02-21
- Granted: 1993-06-01
- Earliest claimed: 1990-02-21
- Assignees: Saint-Gobain Vitrage International; Acome
- Inventors: Jerome Kozies; Jacques Fremauy; Roland Brechot; Louis Legue
- Web page: https://patentgrep.com/patent/US5216224A

## CPC

- E06B 7/02: for providing ventilation, e.g. through double windows; Arrangement of ventilation roses (airflow control members per se F24F13/08)
- F24F 5/0075: {Systems using thermal walls, e.g. double window}
- E06B 2007/026: {with air flow between panes}
- F24F 2005/0078: {Double windows}
- Y02A 30/00: Adapting or protecting infrastructure or their operation
- Y02B 30/90: Passive houses; Double facade technology
- E06B: FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES (shades or blinds for greenhouses A01G9/22; curtains A47H; lids for car boots or bonnets B62D25/10; skylights E04B7/18; sunshades, awnings E04F10/00)
- F24F: AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING (removing dirt or fumes from areas where they are produced B08B15/00; vertical ducts for carrying away waste gases from buildings E04F17/02; tops for chimneys or ventilating shafts, terminals for flues F23L17/02)
- Y02A: TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02B: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS

## Abstract

The outer wall (19) of a heated room. In a variant, the air is heated by contact with the wall (19), which then is equipped with a Coanda effect air circulation (21). The air (24) is preheated before entering the room.

## Claims

### Claim 1

A process of thermal insulation of a room wall comprising inner and outer walls defining a space therebetween, comprising the steps of:
heating exterior air by flowing the exterior air in the space between said inner and outer walls, so as to draw heat from the space; and
causing the exterior air to flow downwardly along and substantially parallel to an internal surface of the inner wall,
whereby an external surface of the wall is cooled and the room is insulated by the Coanda effect.

### Claim 2

A process of thermal insulation of a room wall, comprising the steps of:
electrically heating the wall; and
causing exterior air to flow downwardly along and substantially parallel to an internal surface of the wall for insulating and cooling the wall by the Coanda effect,
whereby the downward air flow draws heat from the wall so that an external surface of the wall is cooled.

### Claim 3

An apparatus for thermal insulation of a room wall comprising inner and outer walls defining a space therebetween, comprising the steps of:
means for heating exterior air by flowing the exterior air in the space between said inner and outer walls, so as to draw heat from the space; and
means for causing the exterior air to flow downwardly along and substantially parallel to an internal surface of the inner wall,
whereby an external surface of the wall is cooled and the room is insulated by the Coanda effect.

### Claim 4

An apparatus for thermal insulation of a room wall comprising the steps of:
means for electrically heating the wall; and
means for causing exterior air to flow downwardly along and substantially parallel to an internal surface of the wall for insulating and cooling the wall by the Coanda effect,
whereby the downwardly air flow draws heat from the wall so that an external surface of the wall is cooled.

### Claim 5 (depends on 2)

The process of claim 2 wherein said room wall includes an electrically conductive heating layer.

### Claim 6 (depends on 1, 2)

The process of claim 1 or 2 wherein said room wall is transparent.

### Claim 7 (depends on 5)

The process of claim 5 wherein said room wall is transparent and said conductive layer is semi-transparent.

### Claim 8 (depends on 5)

The process of claim 5 wherein said conductive layer is on the external surface of the room wall and has an emissivity below 0.40.

### Claim 9 (depends on 8)

The process of claim 8 wherein said conductive layer includes at least one layer from the group consisting of: a metal and metal oxides obtained by pyrolysis of pulverulent organometallic compounds.

### Claim 10 (depends on 4)

The apparatus of claim 4 wherein said room wall comprises a double wall.

### Claim 11 (depends on 4)

The apparatus of claim 4 wherein said heating means comprises an electrically conductive heating layer on said room wall.

### Claim 12 (depends on 11)

The apparatus of claim 11 wherein said conductive layer is on the external surface of said room wall.

### Claim 13 (depends on 12)

The apparatus of claim 12 wherein said conductive layer has an emissivity below 0.40.

### Claim 14 (depends on 3)

The apparatus of claim 3 wherein said room wall is transparent.

### Claim 15 (depends on 11)

The apparatus of claim 11 wherein said conductive layer is obtained by pyrolysis of a product based on an organometallic salt.

### Claim 16 (depends on 15)

The apparatus of claim 15 wherein said conductive layer incorporates a fluorine doped tin oxide.