Patent
1990-02-09
1991-11-12
Joyce, Harold
981153, F23J 1100
Patent
active
050638343
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention concerns a focussed ventilation method and a focussed ventilation apparatus.
Focussed ventilation methods for removing air impurities are known in the art in which separate suction is focussed directly on a work space specific source of impurities. The air containing the impurities is thus treated by being drawn either into purification and/or heat recovery. Therefore, the impurities of the work space have been arranged to be moved for treatment.
SUMMARY OF THE INVENTION
Another of the invention is a focussed ventilation method of a novel kind in which the air containing impurities is arranged to be moved off from the work space so that it will not enter the respiratory zone of the person working in said work space.
As taught by the invention, the impure air of the work space is moved away with a means comprising a blower the equivalent generating an air flow, whereby the air or gas containing impurities, or the excess heat of said work space is drawn off from the work space by means of suction provided by the blower, and in which method the air or gas is removed from the vicinity of the means, being either treated or untreated. As taught by the invention, the impure air is moved with a focussed ventilation means into a collection zone, e.g. to the vicinity of the impurity limit in the adjacency of the ceiling of the room space, and/or is mixed with the room air in order to be diluted.
In another preferred embodiment of the invention the air is moved with a focussed ventilation means directly into another room space.
The room ventilation means of the invention is mainly characterized in that in the method impure air and/or gas, and/or excess heat is/are drawn off from the source of impurities of the work space in that it will not spread into the respiratory zone of the person working in said work space, and the impure air and/or gas, and/or excess heat is/are moved to a collection zone of the impure air and/or gas, and/or excess heat located in said room space, from which zone said impure air and/or gas, and/or excess heat is/are drawn to be further treated and/or led away, and/or from where it is mixed with the rest of the air of the room space for diluting the impurities and/or the excess heat.
The focussed ventilation apparatus of the invention is mainly characterized in that the focussed ventilation apparatus comprises a body envelope or intake member and a suction aperture therein, wherethrough the vented suction can be focussed directly on the source of impurities of the work space and which apparatus comprises a blower which provides suction, an outlet duct connected to the body envelope, whereby impurities and/or excess heat are drawn with the means so that it/they will not spread into the respiratory zone of the person working at said work space, and whereby the impure air and/or gas, and or excess heat is/are transmitted into a collection zone of impurities, from which said impurities are drawn to be treated further and/or conducted off and/or from where it is/they are diluted into the room space.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention is described in the following referring to certain advantageous embodiments of the invention presented in the figures of the drawings attached, but to which the invention is not intended to be exclusively confined.
FIG. 1 presents schematically a first advantageous embodiment of the method of the invention.
FIG. 2 presents a second advantageous embodiment of the method of the invention.
FIG. 3 presents a perspective view of the focussed ventilation apparatus used in the procedure of the invention.
FIG. 4 presents schematically a third advantageous embodiment of the method of the invention.
FIG. 5 presents schematically an embodiment of the procedure and the apparatus of the invention in which air is carried into the work spot and air from the work spot is removed from said work spot, and it is discharged into the same room space.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
In FIG. 1 is presented a fi
REFERENCES:
patent: 3343626 (1968-07-01), Braun et al.
patent: 3752056 (1973-08-01), Chamberlin et al.
patent: 4050368 (1977-09-01), Eakes
patent: 4268282 (1981-05-01), Mackenzie
Aalto Erkki
Eloranta Jouko
Pellinen Teuvo
Halton Oy
Joyce Harold
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