Ventilation – Having both inlet and outlet airways – With air pump means
Reexamination Certificate
1999-09-23
2001-06-05
Lu, Jiping (Department: 3749)
Ventilation
Having both inlet and outlet airways
With air pump means
C454S235000, C454S244000
Reexamination Certificate
active
06241600
ABSTRACT:
FIELD OF THE INVENTION
This invention relates to a ventilation device for promoting air flows, and more particularly, to a ventilation device having a plurality of fans for producing air flows in opposite directions to one another.
BACKGROUND OF THE INVENTION
A conventional ventilation device is provided with a single fan which is rotated in a direction to ventilate a room by a air flow of a predetermined direction. However, if the room is in airtight condition, ventilation of the room is hindered due to the air resistance caused by such condition. Therefore, in order to effectively ventilate a room using a conventional ventilation device, a window or door of the room must be opened.
However, opening the window or door may cause dust or polluted air or even external noise coming in the room, which is unhealthy and unpleasant for people inside the room. Further, since the conventional ventilation device can only function to ventilate the air, another device or devices have to be used to clean the polluted air (air cleaner) and/or warm the air in the room (air conditioner).
SUMMARY OF THE INVENTION
Therefore, it is an object of the present invention to provide a ventilation device which can effectively ventilate a room in an airtight condition.
It is another object of the present invention to provide a ventilation device which can be used as an air cleaner or an air conditioner.
It is a further object of the present invention to provide a ventilation device which can produce two air flows in opposite directions to reduce air resistance when used in a room in an airtight condition.
It is a further object of the present invention to provide a ventilation device which can produce two or more air flows in directions different from one another to avoid interference between the air flows in either outside or inside of the room.
It is a further object of the present invention to provide a ventilation device which is able to achieve high ventilation efficiency with low cost.
In order to achieve the above objects, the present invention provides a ventilation device which is provided with a plurality of fans installed in the ventilation device wherein the plurality of fans are rotated in opposite directions to one another so that both incoming and outgoing air flows with the same or different degree are established.
The ventilation device preferably includes a first tubular body for mounting therein at least one of the fans, a second tubular body for mounting therein the other fan, a regulating plate for regulating a direction of the air flow, and an extending plate movably provided along an extended line of said regulating plate.
In another aspect, the ventilation device of the present invention for ventilating between inside and outside of the room includes a tubular body installing a first fan therein, an air duct for establishing an air flow path between the inside and outside of the room, and a fan compartment having a second fan therein wherein the fan compartment establishes a first air passage to the tubular body through a first air hole and further establishes a second air passage to the air duct through a second air hole, wherein the fan stored in the tubular body is rotated in a opposite direction from the rotating direction of the fan stored in the fan compartment. The ventilation device further includes a first plate to be inserted therein for either opening or closing the first air passage and a second plate to be inserted therein for either opening or closing the second air passage.
Preferably, the ventilation device of the present invention is provided with filters in combination with the fans for cleaning the polluted air in the room. The filter may be replaced with a heater so that the device can be used as a heating apparatus of the room.
According to the ventilation device of the present invention, the air resistance of the room caused in an airtight condition of the room by ventilation becomes small so that the room can be effectively ventilated.
Further, by providing air filters or heaters in combination with the plurality of fans, the ventilation device can be used as an air cleaner or an air conditioner.
REFERENCES:
patent: 2679795 (1954-06-01), Gieger
patent: 2732027 (1956-01-01), Wallin
patent: 3472148 (1969-10-01), Winnett
patent: 3722395 (1973-03-01), Courchesne
patent: 4336748 (1982-06-01), Martin et al.
patent: 5334091 (1994-08-01), Shih-Chin
Lu Jiping
Muramatsu & Associates
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