US2265112A

US2265112A - Ventilator

Info

Publication number: US2265112A
Application number: US331072A
Authority: US
Inventors: Davies Charles
Original assignee: Individual
Current assignee: Individual
Priority date: 1940-04-23
Filing date: 1940-04-23
Publication date: 1941-12-02
Anticipated expiration: 1958-12-02

Description

Dec. 2, 1941. r C DAVlEs 2,265,112

VENTILATOR Original Filed Aug. 1s 1954 INVENTOR CHARLES DA V/ES 'BY N? K ATTORNEY Patented Dec. 2, 1941 Y scams. (o1. 230-127-l .Thisiinventionrelates to ventilatorsof thetype intended to provide filteredair to .the'spacento be ventilated.

The primary object of this invention is to provide a ventilator furnishing a fully adequate flow of air.

Further important objects of this invention are to provide means to create a flow of air which shall be inherently noiseless in its operation; which shall deliver air in such manner as to avoid drafts; which shall be simple in structure and efficient in operation.

Other and further objects and advantages of my invention will become apparent from the description herein of various preferred embodiments of my invention, shown in the drawing in which:

The figure is a vertical cross-sectional view of a ventilator embodying my invention in preferred form.

My ventilator comprises a casing I of box-like or similar shape, adapted to be placed in a window or other opening of the room or other space to be ventilated and provided with the front and rear walls, 2 and 3 respectively. The rear wall 3 is provided with air inlet openings 4 protected from the weather by hoods 5, only one of each of the openings 4 and hoods 5 being shown. Inside the casing l and adjacent the rear wall 3 an air filter 6 is placed across the flow of air from the inlets 4.

The front wall is provided with a circular opening 1. A tube or duct 8 of approximately the same diameter as the opening 1 extends backwardly into the casing I to a convenient distance. An electric motor 9 is mounted the tube 8 by means of any convenient suspension as shown conventionally at [0.

The motor 9 is provided with a. shaft I l which drives the air impeller l2. The impeller comprises a front plate l3, to the rear of which the motor shaft is attached, a rear ring l4 and peripheral blades l5 held between the front l3 and the rear ring [4. A concave collecting and deflecting. bowl I6 is attached to the rear ring l4 and extends upwardly and forwardly over the impeller cage.

A stationary structure co-operating with the rotor structure above described is mounted at the mouth of the duct 8 by means of the flange ll fitting within the tube 8. A skirt l8 depends from the inner edge of the flange l1 and is curved forwardly to co-operate with the outer surface of the bowl IE, to provide a Venturi-like annular J6. -i'l1dlll fih9 outer edge of the flange. 1H an outwardly and forwardly flaring guide l9collects,

.-guides and. delivers to =,the roomall the; air. moved by theiimpeller. flat, plate .20,.substantially of the same dimensions as the plate 13, is placed at an appropriate distance in front of the latter; and may have its edge curved forwardly as at 2| to provide an annular air exit duct in co-operation with the bell I9. The plate may conveniently be mounted within the bell l9 by means of the spider 22.

In operation, when the impeller is rotated by the motor, air enters the inlets 4, passes through the filter 6 and enters the duct 8. Part ofthe air entering the duct passes through the impeller cage, and the remainder is drawn over the outer surface of the bowl IS. The air passing through the cage is collected by the bowl [6 and directed outwardly and forwardly. The air drawn over the outside of the bowl passes through the duct formed by I6 and I8 and joins the air from the impeller cage. The mingled air is received by the bell I9 and guided and delivered forwardly into the space to be ventilated in the form of a diverging, annular sheet diflused sufficiently to avoid the creation of drafts in spite of the large volume of air moved by the impeller. The arrows in the figure show the movement of the air through and in the vicinity of my device.

The provision of the plate 20 is a very important feature of my invention. It prevents the formation of a vacuum by the low pressure area at the center of the wheel while the edge of the plate co-operating with the collector bowl, determines thepressurecharacteristics of the pump. Thus the plate 20 functions, in a manner-comparable to that of the scroll in an ordinary centrifugal blower, to transform or convert velocity pressure into static pressure; and a good part of the efficiency of my pump arises therefrom.

It is clear that many variations in the application of my invention the ventilation of a room may be made without departing from its scope and spirit.

I claim:

1. An air pump comprising a centrifugal impeller wheel, a rotating collector and deflector extending over the periphery of the wheel, and

'a stationary plate placed parallel to and in front of the impeller wheel, said plate having its peripheral portion 'extending outwardly and forwardl'y, to block off the space in front of the said wheel.

'2. In apparatus of the class described, an air exit for air drawn over the exterior of the bowl duct, a centrifugal impeller wheel mounted to 3. In apparatus of the class described, an airmounted on and extending over the periphery of the impeller wheel, a stationarym'ember provided with a portion extending toward an'd.co" operating with the collector to form' an annular Venturi-like passage for air drawn over the outside of the collector, and an outwardly flaring portion adapted to receive and direct forwardly to rotate in said duct, a collector and deflector mounted on and extending over the periphery of the impeller wheel, a stationary member provided with a portion extending toward and co-operating with the collector to form an annular, Venturilike passage for air drawn over the outside of the collector and an outwardly flaring portion adapted to receive and direct forwardly air from the collector and from the said annular passage,

and stationary means to block off the space in front of the impeller wheel. duct, a centrifugal impeller wheel mounted to"- rotate in said duct, a collector and deflector centrifugal impeller mounted to rotate, means mounted on and extending forwardly over ithe 5. In an apparatus of the class described, a

periphery of the impeller to collect and dii ect forward air. delivered by the impeller, stationary peller, said means having portions co-operating with the collector means aforesaid to convert 1velocity pressure of the air moved by the'impeller -into static pressure.

CHARLES DAVIES. V