Rotary kinetic fluid motors or pumps – Working fluid passage or distributing means associated with... – Vane or deflector
Utility Patent
1999-08-10
2001-01-02
Look, Edward K. (Department: 3745)
Rotary kinetic fluid motors or pumps
Working fluid passage or distributing means associated with...
Vane or deflector
C415S212100, C415S214100
Utility Patent
active
06168378
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to ventilators used in building ventilation systems, and more particularly to air deflectors for use with such ventilators.
Ventilation systems are used to control the temperature and air quality in buildings. These ventilation systems include a number of exhaust ventilators spaced throughout the building to withdraw air from the rooms in the building. Removal of air from the rooms allows a separate heating and/or air conditioning system in the building to supply air to the rooms to effectively control the temperature within the building.
The ventilators connected to the ventilation system are normally located directly above the ceiling of the room so that the ventilator can withdraw air from the room by means of a fan or blower mounted in the ventilator. After the air is drawn into the ventilator by the blower, the air is then discharged from the ventilator by the blower through an outlet opening in the ventilator housing. The outlet opening is connected to a ventilation duct that extends throughout the building. The ventilation duct leads from the ventilator to the exterior of the building, allowing the air removed by the ventilator to be vented to the outside atmosphere.
The ventilator typically includes a blower assembly housed within a ventilator housing. The blower assembly comprises a scroll cage with air inlet openings on the sides thereof, and an air outlet opening at one end of the scroll cage. The scroll cage includes a blower wheel mounted therein and driven by an electric motor. The ventilator housing includes an outlet opening which is designed to mate with the outlet opening of the blower assembly.
Prior art ventilator housings are generally made with different sized outlet openings which may or may not be the same size as the outlet openings of the blower assembly housed therein. A ventilator housing having a smaller sized outlet opening than the blower assembly outlet opening causes a decrease in air flow and an increase in air turbulence, making the ventilation system very noisy and inefficient. In addition, it is desirable to use a common blower assembly in different ventilation housings to reduce the number of parts and production costs involved in manufacturing the ventilation systems. A larger, wider blower wheel that spins slower and moves a larger amount of air reduces vibration and noise within the system. Therefore, there is a need for a ventilation system that is quieter and more efficient than prior art systems.
To satisfy this need, a pair of air deflectors have been designed for attachment to the outlet opening of a blower assembly to act as a transition between the outlet opening of the blower assembly and the outlet opening of the ventilator housing to increase air flow, decrease air turbulence and decrease noise in the ventilation system.
SUMMARY OF THE INVENTION
The present invention provides a pair of air deflectors which are attached to the outlet opening of a blower assembly housed within a ventilator housing to accommodate multiple size outlets in the ventilator housing. The air deflectors are formed of a single piece of rigid material, such as metal. The air deflectors each include a front portion which attaches to a sidewall flange extending outwardly from the outlet opening of the blower assembly, a transition portion extending rearwardly and at an angle from the front portion, and a flange extending rearwardly from the transition portion which attaches to a sidewall of the blower assembly.
The air deflectors are comprised of a right side air deflector that is attached to the right side of the blower assembly outlet opening and a left side air deflector that is attached to the left side of the blower assembly outlet opening. The right and left side air deflectors are mirror images of each other. Each deflector has a front portion, a transition portion extending rearwardly and at an angle from the front portion, and a flange extending rearwardly from the transition portion. The front portion of each air deflector includes a hole extending therethrough for attaching the outlet opening of the blower assembly to the outlet opening of the ventilator housing with fasteners and the like.
The air deflectors are fixedly attached to each side of the blower assembly's outlet opening to decrease the width of the outlet opening and to provide a smooth transition for air flow from the blower assembly through the ventilator housing and into a ventilation duct attached to the ventilator housing.
Various other features, objects and advantages of the invention will be made apparent to those skilled in the art from the following drawings and detailed description of the invention.
REFERENCES:
patent: 1663998 (1928-03-01), Schmidt
patent: 2282015 (1942-05-01), Williams
patent: 3020829 (1962-02-01), Pearson
patent: 3874191 (1975-04-01), Hudson
Craw Gary J.
Karst Daniel L.
Andrus Sceales, Starke & Sawall
Broan-Nutone LLC
Look Edward K.
Nguyen Ninh
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