US2373496A - Ventilator - Google Patents

Description

April 10, 1945.

PIIII'IIIIII H. T. PAISTE, JR

VENTILATOR Filed Sept 8, 1941 s Sheets-Sheet 2 p 1945. H. TQPAIS'TE, 4R 2,373,496

VENTILATOR Filed Sept.,8, 1941 s SheeiS-Sheet s .Zhvarzfor WKM trol.

Patented Apr. 10, 1945 VENTILATOR Henry T. Paiste, J r., Villanova, Pa., assignor to Philco Radio and Television Corporation, Philadelphia, Pa., a corporation of Delaware Application September 8, 1941,,Serial No. 410.067

6 Claims.

This invention relates to ventilating units, and has especial reference to self-contained, portable units adapted for ready installation on a window sill. More particularly, the invention relates to ventilators of the above type which employ power driven fan means and provide for selective control of air circulation by the manipulation of dampers.

It is the primary object of the present invention to improve and simplify, the construction and assembly of such ventilators, and to provide a unit having novel air circulation control means, which is easy to operate and is constructed in such a way as to improve the fan efficiency.

Another object of the invention is to provide a ventilator in which the fan scroll is formed in part by the cabinet structure and in part by adjustable air-control dampers which are highly eificient and susceptible of easy and positive con- A further object of the invention residesin the provision of a unified control means for the dampers, of such a naturethat the direction and quantity of the moving air may be either simultaneously or independently varied.

A still further object of the invention is to provide a ventilator which may be easily assembled from relatively inexpensive materials, and which is of, such a constructional arrangement that the motor and its associated fan units may be readily inserted into or withdrawn from the casing to effect installation, adjustments or repairs.

Other objects and advantages of the invention will be best understood b considering the following detailed description in the light of the accompanying drawings, in which doors or dampers and the control linkage therefor; andillustrates one of the scroll partitions:

Fig. is a detail sectional view taken along line 55 of Fig. 3; and

Figs. 6 to 9 are diagrammatic views showing the air fiow resulting from different adjustments of the, control dampers. I I

.With' particular reference to Figs. 1, 2 and 3 of the, drawings, it will be seen that the ventilator comprises a cabinet having a curved scroll-forming roof portion' I preferably formedof wood veneer. Suitably configured side panels 2, as

shown. extend along the side of the ventilator from the front to the rear thereof. A unitary grill member 3 covers the front of the cabinet, and may be detachably fastened to the side panels 2 and base member 4, as by means of recessed screws 5.

Although the ventilator is portable, as pointed out above, and may be used Wherever it is convenient to do so, it is particularly well suited to permanent installation, as on a window sill. For this purpose, there is provided a sash basing strip 6 which extends horizontally across the top of the cabinet immediately behind the curved scroll portion I. The upper surface of thisstrip is adapted to cooperate with and support the lower edge of the window sash (not shown). A rear closure door I is slidingly fitted-in vertical tracks "8, inwardly of a suitable rain hood 9. As it appears in Figs. 1 and 2, this slidig door is equipped with a suitable hinge la, which may be of the piano-hinge type. This hinge permits the door 1 to fold backward against the roof portion I, when the door is in the open position. It will be obvious that the ventilator must be fixed-with.

relation to the window frame or sill, and that side adaptor panels will be necessary if the window is wider than the ventilator. However, as this mounting is not a part of the present invention. and may be done in any convenient way, it is not necessary to illustrate it. The interior construction of the unit will no be described with particular reference to Figs. 2. 3 and 4 of the drawings. A motor l0, located centrall of the device, is supported by brackets ll fixed to a pedestal block I 2, through which passes a damper control rod 13. The motor is provided with short shaft extensions 14-14 to which are fixed a pair of fans l5l5. For efilciency and quiet operation a squirrel-cagefan isemployed, that is, one in which air is supplied to the fan along the shaft axis, and is discharged outwardly through the blading, as indicated by the arrows in Fig. 3.

An air cleaning filter l6, of spun glass or the like, is provided. The interior of the ventilator is divided into three compartments, one for the motor and the others for the fans, by a pair of partitions I1--l'l of scroll shape. These partitions conform with the contour of roof member I and, as most clearly appears in Fig. 4. are provided with a generally central aperture I8 of a diameter equal to that of the fans I 5. As may be seen by a comparison of Figs. 2 and 4, these partitions define the general scroll shape which has the type employed. Each partition is provided with a forward vertical edge which resides closely adjacent the front grill member s. To facilitate assembly of the device, each partition member is further provided with a removable insert IE adapted to be fixed thereto, as by means of screws as. Reference to Fig. 2 will show that with this type of construction the cabinet may be completely fabricated at one zone of an assembly line, after which the motor and its associated fans may be readily inserted as a unit at another zone of the line. At this later stage of as semlbly, with the motor already fastened to its mounting block, it is a relatively simple matter to insert the shafts i l into the partition slots, move the motor up into place in the cabinet, and allow the mounting block to swing downwardly into position in contact with the floor plate 4. Fastening the block to said plate and screwing the inserts l9 into place completes the motor and fan installation.

Referring now to the air control means, it will be seen that the device is provided with pairs of front and rear damper doors 2l-2l and 22-22 respectively. The vertically disposed front doors are mounted for horizontal sliding movement beitween grill member 3 and a. pair of scroll filler pieces 23-23 as by means of a track 2311; while the rear dampers, shaped to the configuration of the scroll partitions, are mounted for horizontal sliding movement by means of tracks 24 and 25 (see Fig. 2), and extend from the floor to the curved roof member, to close and complete the scroll shape. As will be clear from the description of operation, in at least two of their positions of adjustment, these curved rear doors cooperate with the roof member I to form a part of the fan scroll.

Each of the four doors is equipped with a movable arm 28. The arms are pivotally connected to the doors as at 21, and have their other ends pinned to a door actuatinglever 28 which, in the case of the curved rear doors, is fixed to the actuating shaft l3 (see Fig. 4). The actuating lever of the forward pair of doors is fixed to a short hollow shaft 29 of larger diameter than shaft l3 and mounted concentrically therewith. .As will be apparent from Fig. 5, shafts l3 and 29 are provided with external control knobs 30 and 3|, respectively, the knobs being positioned to permit either simultaneous or independent variation of the setting of the two shafts.

The various types of operation of which the device is capable' will now be discussed, and will be best understood by considering Figs. 4 and 6 to 9.

Figs. 6 to 9 illustrate diagrammatically the four fundamental conditions of operation, and in discussing these flgures, the upper edge of each diagram will be considered the outdoors side of the units, while the lower edge represents the indoors side.

knob on the front panel is turned to the on position, and both of the control knobs 30 and 3| are turned counter-clockwise until the pairs of damper doors reach the positions shown in 6. In this position of adjustment (and with the vertical sliding door 1 open) air will fiow through the filter into the central chamber, thence along the blower axis into each of the fan chambers. and will be expelled into the room through the side louvers in panel 3. It will be understood that the air is actually thrown outwardly through the blading (the motor always turns in the same direction) and is'forced into the room by the cooperating scroll throughan opening in either the back or the front thereof, depending upon the g iiustment of the dampers.

To exhaust the highest possible amount of air from the room, the knobs 3t and it are turned in the clockwise direction until the control clampers have reached the position shown in Fig. Z. As will be readily apparent from the figure, the room air enters the unit through the central part of the grillwork, flows along the axes of the blowers through the apertures is provided in the partitions l1, and is again expelled from the fan chambers.

Fig. 8 illustrates the damper adjustment necessary to effect simultaneous two-way flow of the air. In view of the preceding explanations, further elucidation of this figure is not necessary, except to point out that the air coming from both sides of the unit is entering the central chamber, the fan chambers still being used purely for expulsion.

To effect recirculation of the room air, the doors are moved to the positions shown in Fig. 9. When this adjustment has been made, and the sliding door I closed, the unit will cause a substantial circulation of air within the room.

From the foregoing description, it will be seen that the invention provides a novel ventilating device capable of a number of different types of operations in which the fan scroll is formed in part by the main structural elements of the cabinet itself, and in part by adjustable air-control dampers which are highly efficient and susceptible of easy and positive control. In addition, the damper control means is conveniently arranged, readily adjustable and positive in its action.

It will also be apparent that the invention provides a ventilating unit which, although portable and highly compact, may be easily assembled from relatively inexpensive materials, and the power unit of which is accessibleand may be readily removed, should repairs be necessary.

The ventilator illustrated may be modified in certain respects without departing from the spirit of the invention. For example, the number and arrangement of the various chambers might be altered, the fans might be driven from some external source, rather than the motor shown, etc. Moreover, it will be clear that the invention is not to 'be understood as being limited to the use of scroll-shaped dampers in the rear of the ventilator only, but that this principle may be applied to the front damper doors as well, if such should be desired. However, it will be understood that the invention contemplates such changes and modifications as may fall within the scope of the appended claims.

I claim: I

1. In a ventilator, a casing having air ingress and egress openings therein, air-propelling means within said casing, a plurality of adjustable dampers for controlling the flow of air through said openings, and actuating means for the respective dampers including a pair of concentric dampers forming a portion of the scroll wall control elements each operable by a separate manual control member, said members being constructed and arranged to enable simultaneous or individual adjustment of said dampers.

3. In a ventilator capable of moving air both into and out of a space to be ventilated, the combination of a substantially scroll-shaped casing divided to provide separate inlet and exhaust chambers, a passage between said chambers, said chambers being of generally scroll shape and said exhaust chamber having air propelling means therein, each of said inlet and exhaust chambers having an opening communicating with the atmosphere and an opening communicating with the space to be ventilated, and a pair of dampers,

each damper being adapted to cooperate selectively with one of the openings in the inlet chamber and with one of the openings in the exhaust chamber, one of said dampers being mounted for translational movement to effect selective cooperation with said two chambers and constituting a portion of said scroll-shaped casing when in cooperation with either of said chambers.

a 4. In a ventilator, the combination of a casing divided to provide separate inlet and exhaust chambers, a passage between said chambers, said exhaust chamber being of generally scroll-shape and having air propelling means therein, both said inlet and exhaust chambers having openings respectively communicating with the atmosphere and with a space to be ventilated, a pair of dampers, each damper being constructed and arranged to cooperate with one of the openings in the inlet chamber and with one of the openings in the exhaust chamber, and means providing selective control or the positions or said dampers, whereby air may be moved under the influence of the propelling means both into and out of the space to be ventilated, said damper control means comprises two concentric control elements, each operable by means or a separate manual control member, said members being constructed and arranged to provide for either simultaneous or independent variation of the positions or said dampers, at least one of said when in one of itspositions of adjustment.

5. In a ventilating unit capable of moving air both into and out of a space to be ventilated, a blower chamber, a blower in said chamber, an

air intake chamber communicating with said blower chamber for delivery of air to the blower, each of said intake and blower chambers having a pair. of openings communicating respectively with the atmosphere and with the space to be ventilated, a pair of dampers operatively associated respectively with the two sets of corresponding openings of said pairs, each damper being mounted for edgewise translational move-' ment between two terminal positions in one of which it closes one of the openings of the associated set sand in the other of which it closes the other opening of. said set, and said dampers being operative in positions intermediate said terminal positions to simultaneously partially close both of the openings of the associated set and in varying relative degrees depending on said position, said dampers thereby providing for regulated movements of air under influence of the blower either into or out of the space to be ventilated or both into and out of the said space simultaneously.

6. In a ventilator, the combination of a casing divided to provide separate inlet and exhaust chambers, a port between said chambers, said exhaust chamber being of generally scroll shape and having air-propelling means therein, each of said inlet and exhaust chambers having a pair of openings respectively communicating with the atmosphere and with the space to be ventilated, a pair of dampers operatively associated respectively with the two sets of corresponding openings of said pairs, each damper being mounted for edgewise translational movement between two terminal positions in one of which it closes one of the openings or the asosciated set and in the other or which it closes the other opening of said set, and said dampers being operative in positions intermediate said terminal positions to simultaneously partially close both of the open: ings of the associated set and in varying relative degrees depending on said position, said dampers thereby providing for movements of air under influence o! the propelling means either into or out of the space to be ventilated or both into and out of the said sets simultaneously, at least one of said dampers forming a portion of the scroll wall when i'n certain of its positions of adiustment.

HENRY '1. PAISTE, Js.

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