CA1172089A - Ventilation method and apparatus - Google Patents
Ventilation method and apparatusInfo
- Publication number
- CA1172089A CA1172089A CA000393282A CA393282A CA1172089A CA 1172089 A CA1172089 A CA 1172089A CA 000393282 A CA000393282 A CA 000393282A CA 393282 A CA393282 A CA 393282A CA 1172089 A CA1172089 A CA 1172089A
- Authority
- CA
- Canada
- Prior art keywords
- balloon
- fan
- room
- opening
- air
- 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.)
- Expired
Links
Landscapes
- Ventilation (AREA)
Abstract
Abstract:
The invention relates to a method and apparatus for the temporary ventilation of a room and is especially adapted for the removal of harmful substances during painting or other work in the room. A fan blows air from the room through an inflatable balloon that is placed in an opening, e.g., a window, in a wall of the room. The balloon has at least one exhaust opening to the exterior that is dimensioned so that an overpressure is built up inside the balloon sufficient to keep it inflated and in engagement with the periphery of the opening.
The invention relates to a method and apparatus for the temporary ventilation of a room and is especially adapted for the removal of harmful substances during painting or other work in the room. A fan blows air from the room through an inflatable balloon that is placed in an opening, e.g., a window, in a wall of the room. The balloon has at least one exhaust opening to the exterior that is dimensioned so that an overpressure is built up inside the balloon sufficient to keep it inflated and in engagement with the periphery of the opening.
Description
:~L7~89 Ventilation method and apparatus The present invention relates to a method and apparatus for the temporary ventilation of a room. A fan is arranged to transfer air from the room through an existing opening, e.g., door or window, in a wall thereof.
Such temporary ventilation of a room would be required, for example, to remove harmful solvents from the room when painting or similar work is in progress. An increasing problem in connection with such work is the volatile and often very harmful solvents now used in paints. To prevent the concentration of solvents in the air from becoming too high an effective air exchange must be provided. This is normally achieved by opening a window and/or doors to create a draft. Apart from the fact that the direction of this draft is not controllable, it often causes discomfort to the persons exposed to it.
The object of the present invention is to provide a method and apparatus for avoiding this problem by providing controlled ventilation of a room through an open window or another opening in the room without appreciably influencing adjacent rooms.
In practicing the invention a fan is used for transporting the ventilating air. On its way from the room the ventilating air is caused to pass into a balloon placed in the opening.
This balloon is arranged so that it is inflated and seals against the periphery of the opening whereby to separate the room from the exterior. In the preferred embodiment a flexible hose connects the fan to the balloon. On its side ~' facing the exterior the balloon is provided with exhaust holes so dimensioned that the balloon is kept inflated to an extent sufficient to seal against the edges of the opening.
An embodiment of the invention is described below with reference to the attached drawing.
In the drawing 1 refers to the room that is to be ventilated, 2 to the ceiling of the room, 3 to its floor and 4 to a wall, preferably an outer wall having a window 5 with a window frame 6.
On the floor 3 there is a fan stand 7 in which is mounted a cylindrical fan housing 8. In the lower part of the fan housing 8 there is an axial fan 9 with a driving motor 10. The fan housing 8 has a net 11 across its bottom surface. Also above the fan 9 there is a net 12, above which there is an empty space 13.
A flexible hose 14 is connected to the upper part of the fan housing and leads to an inflatable balloon 15. The hose and balloon can preferably be made from the same material - and also in one piece - e.g., from an essentially air tight textile, so-called spinnaker cloth. The hose and the balloon can be stored in the space 13 when the apparatus is not in use.
The balloon 15 is placed in the window opening 5 and by means of the fan 9 inflated so that it engages the window frame 6. From the balloon the ventilating air passes out through holes 16 in the outer wall of the balloon. These holes are of restricted size so that an overpressure will build up in the balloon sufficient to keep it in engagement with the frame 6. Replacement air to the room 1 can be brought in from adjacent rooms, stairways or the like.
By means of this apparatus a room can be ventilated through an open window opening that is sealed by the balloon using the internal pressure of the exhaust air transported by the fan. The apparatus thus has the same function as if the fan were mounted in a board sealing the window opening, i.e., air is exhausted through the opening without letting outside air back into the room. The apparatus can be handled simply, is flexible and adaptable. The low location of the fan 9 in the fan stand 7 on the floor results in the relatively heavy, gaseous solvents, which tend to stay near the floor, being caught by the fan and blown out through the hose 14 and the balloon 15.
- Apart from venting gaseous solvents and the like the apparatus is also useful in transferring solid particles, such as air-borne dust particles, from a room.
Such temporary ventilation of a room would be required, for example, to remove harmful solvents from the room when painting or similar work is in progress. An increasing problem in connection with such work is the volatile and often very harmful solvents now used in paints. To prevent the concentration of solvents in the air from becoming too high an effective air exchange must be provided. This is normally achieved by opening a window and/or doors to create a draft. Apart from the fact that the direction of this draft is not controllable, it often causes discomfort to the persons exposed to it.
The object of the present invention is to provide a method and apparatus for avoiding this problem by providing controlled ventilation of a room through an open window or another opening in the room without appreciably influencing adjacent rooms.
In practicing the invention a fan is used for transporting the ventilating air. On its way from the room the ventilating air is caused to pass into a balloon placed in the opening.
This balloon is arranged so that it is inflated and seals against the periphery of the opening whereby to separate the room from the exterior. In the preferred embodiment a flexible hose connects the fan to the balloon. On its side ~' facing the exterior the balloon is provided with exhaust holes so dimensioned that the balloon is kept inflated to an extent sufficient to seal against the edges of the opening.
An embodiment of the invention is described below with reference to the attached drawing.
In the drawing 1 refers to the room that is to be ventilated, 2 to the ceiling of the room, 3 to its floor and 4 to a wall, preferably an outer wall having a window 5 with a window frame 6.
On the floor 3 there is a fan stand 7 in which is mounted a cylindrical fan housing 8. In the lower part of the fan housing 8 there is an axial fan 9 with a driving motor 10. The fan housing 8 has a net 11 across its bottom surface. Also above the fan 9 there is a net 12, above which there is an empty space 13.
A flexible hose 14 is connected to the upper part of the fan housing and leads to an inflatable balloon 15. The hose and balloon can preferably be made from the same material - and also in one piece - e.g., from an essentially air tight textile, so-called spinnaker cloth. The hose and the balloon can be stored in the space 13 when the apparatus is not in use.
The balloon 15 is placed in the window opening 5 and by means of the fan 9 inflated so that it engages the window frame 6. From the balloon the ventilating air passes out through holes 16 in the outer wall of the balloon. These holes are of restricted size so that an overpressure will build up in the balloon sufficient to keep it in engagement with the frame 6. Replacement air to the room 1 can be brought in from adjacent rooms, stairways or the like.
By means of this apparatus a room can be ventilated through an open window opening that is sealed by the balloon using the internal pressure of the exhaust air transported by the fan. The apparatus thus has the same function as if the fan were mounted in a board sealing the window opening, i.e., air is exhausted through the opening without letting outside air back into the room. The apparatus can be handled simply, is flexible and adaptable. The low location of the fan 9 in the fan stand 7 on the floor results in the relatively heavy, gaseous solvents, which tend to stay near the floor, being caught by the fan and blown out through the hose 14 and the balloon 15.
- Apart from venting gaseous solvents and the like the apparatus is also useful in transferring solid particles, such as air-borne dust particles, from a room.
Claims (6)
1. A method of ventilating a room using a fan for trans-ferring air from the room through an opening in a wall thereof, characterized in that the air is passed through a balloon placed in the opening, exit of the air from the balloon to the exterior taking place under such resistance that an overpressure is built up in the balloon, said overpressure being sufficiently great to inflate the balloon and keep it in engagement with the periphery of the opening.
2. Apparatus for ventilating a room comprising a fan, an inflatable balloon connected to receive air from the fan and to be placed in an opening in a wall of the room, said balloon having at least one exhaust opening dimen-sioned so that when air passes into the balloon from the fan an overpressure is built up in the balloon to keep it inflated and in a substantially sealing relation to the periphery of the opening.
3. Apparatus according to claim 2, wherein the balloon merges into or is connected to a flexible hose that is connected to a housing in which the fan is mounted.
4. Apparatus according to claim 3, wherein the fan housing is a straight circlar cylinder and is supported by a stand adapted to stand on the floor of the room and to keep the fan housing substantially vertically oriented and spaced above but near the floor.
5. An apparatus according to claim 4, wherein the fan is mounted in the lower part of the housing, the housing above the fan being provided with a space the bottom of which is terminated by a net, said space being adapted for storing the balloon and the hose when the apparatus is not in use.
6. Apparatus according to any one of the claims 2 to 4, wherein at least the balloon is of an essentially air tight textile material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000393282A CA1172089A (en) | 1981-12-29 | 1981-12-29 | Ventilation method and apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000393282A CA1172089A (en) | 1981-12-29 | 1981-12-29 | Ventilation method and apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1172089A true CA1172089A (en) | 1984-08-07 |
Family
ID=4121719
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000393282A Expired CA1172089A (en) | 1981-12-29 | 1981-12-29 | Ventilation method and apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1172089A (en) |
-
1981
- 1981-12-29 CA CA000393282A patent/CA1172089A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEC | Expiry (correction) | ||
| MKEX | Expiry |