US1938801A

US1938801A - Ventilating and air conditioning device

Info

Publication number: US1938801A
Application number: US552174A
Authority: US
Inventors: Roland B Bourne; Hiram H Maxim
Original assignee: Maxim Silencer Co
Current assignee: Maxim Silencer Co
Priority date: 1931-07-21
Filing date: 1931-07-21
Publication date: 1933-12-12
Anticipated expiration: 1950-12-12

Description

Dec. 12, 1933. R. B. BOURNE Er AL VENTILATING AND AIR CONDITIONING DEVICE Filed July 21, 1931 Patented Dec. 12, 1933 UNITED STATES PATENT OFFICE VENTILATING AND AIR CONDITIONING DEVICE Connecticut Application July 21, 1931. Serial No. 552,174

6 Claims.

This invention relates to ventilators of the type adapted to be installed as a unit in connection with a wall opening to furnish a supply of suitably conditioned air to a room or compartment. One purpose of the invention is to provide a compact suitably proportioned unit adapted to be positioned within a room or Within the outside wall of a room and to further provide for the ltering and heating or cooling of the air drawn through it as well as to attenuate l any street or other noises which4 might otherwise come through the unit.

It has been found that in devices of this character best results are obtained when a certain order or sequence is observed in the conditioning operations on the incoming air. With four elements involved, namely air moving means such as a fan blower, an air filter, an air heater or cooler, and a sound attenuator, we have found it of advantage to first pass the air through the filter, thus preventing dirt and soot from depositing on' the other three elements. The next element in sequence should be the fan, since it is desirable to use the sound attenuating means to intercept fan noise as well as the street noises. The sound attenuating system should come next, it being desirable to place the heating or cooling element last to avoid the passage of hot air through the sound attenuating system since the acoustic properties of the materials used to line the passages of the sound attenuator might, in the case of some materials, be altered or impaired by exposure over a substantial length of time to the heated air. This arrangement has further advantages in making possible a more even load- 3 ing of the air moving means and greater elliciency in the lter and sound attenuating systems.

In the accompanying drawing, which illustrates one embodiment of our invention:

4 Fig. 1 shows a perspective view of the device looking, from the room or front side, parts being brokenaway to disclose the interior arrangement;

Fig. 2 is a front elevation with the front wall removed;

Fig. 3 is a rear elevation with the rear wall removed;

Fig. 4 is a transverse sectional view, substantially on line 4--4 of Fig. 2; and 50 Fig. 5 is a fragmentary sectional view of one of the sound attenuating portions on a larger scale,

showing the sound attenuating covering.

Referring to the drawing, the unit is shown as comprising a rectangular casing 1 divided longitudinally by a partition 2 into two compartments. The compartment adjacent the rear or outer wall contains the air :filter and fan units and the inner compartment houses the sound attenuating system and the air temperature controlling means.

Air is admitted to the casing l through an elongated opening 4 in the rear wa'll and is dellected downwardly, by a curved plate 5, to and through the air lter. The filter comprises a web 6 of 65 crepe paper, muslin or the like, supported in zigzag formation on rods '7.secured to the rear wall of the casing, the zigzag formation presenting a substantial filter area and a more ellicient filter action. The large area presented by this arrangement of the filter web also makes it possible to control in some degree the humidity of the air issuing from the device by a suitable choice of liltering material. From the lter the air, as indicated by the arrows in Fig. 3, is drawn into the ends of two horizontally positioned fan blowers 9, simultaneously driven from opposite ends of the motorshaft of a motor l0 positioned between the blowers. These fan blowers may be of any suitable typel andare therefore not shown gn in detail. The air is discharged from the blowers through openings 11 in partition 2 into the sound attenuation system, which comprises two units, one for each opening l1. The openings 11 discharge into upwardly directed passages 12 formed 85' by curved plates 8 and vertical plates 13, the passages 12 being centrally divided above the openings 11 by plates14 which connect at their top with oppositely curving plates 15 having downwardly extending extensions 16 which with curved 90 bottom plates 17, connected to plates 13, and a central partition 18 and the ends of the casing 1 form upwardly opening tortuous passageways 20, as bestvshown in Fig. 2. These passageways are@ lined with any suitable sound attenuating ma- '95 terial 21, such as felt, as indicated in Fig. 5. The lining material is not shown by separate lines in the other gures as such showing would tend to confuse the disclosure.

-The air heating or cooling unit is positioned directly above and across the openings of pas-- sageways 20 and comprises a plurality of pipes 22 extending between manifold chambers 23 at the ends of casing 1, and steam or hot water is circulated through pipes 22 by fittings 25 which may be connected to the heating system of the building, or a suitable refrigerant is circulated through the pipes where cooling rather than heating of the air is desired. The conditioned air is discharged from the casing through elongated no opening 26 in the top of the casing. In one convenient form of installation, the device is positioned in the wall below a window with opening 26 discharging through a'suitable grille set in the window sill. In other installations, opening 26 may be provided with a hood or an adjustable closure to meet the requirements of the particular installation. Since the treatment of opening 26 will depend on theconditions of a given installation, and does not concern the principles of construction and mode of operation of the device itself, specic disclosure thereof is omitted from the drawing.

In order to make possible the convenient servicing of the various parts of the device, the front plate 28 of the casing lis detachably held in place as by bolts or screws 29, and the various plates and partitions which go to make up the passageways 20 are secured to and are removed with the plate 28. The lower part of central partition 2 is hinged as at 30 (see Figs. 1 and 4) to swing inwardly of the room so that when front plate 28 with the sound attenuating structure has been removed, direct and easy access is had to the ltcr and fan units permitting renewal or cleaning of the lter web and proper maintenance of the fan blowers and their motor.

As will be clear from the above description and drawing, the casing presents an airway from the exterior to the interior of the room and, in operation, air drawn in through openings 4.- and through the filter 6 by the fan blowers 9 passes through openings 11 into the sound attenuating system which presents a total offour sound attenuating passageways. From the .attenuating system the air passes around the temperature controlling pipes v2,2 and'enters the room through the opening 26 formed in'the top of the casing.

What we claim is:

1. A ventilator and air conditioning unit which comprises a casing having inlet and outlet openings, means adjacent the inlet opening for filtering the entering air, means adjacent the outlet opening for controlling the temperature of the air as it leaves the casing, a plurality of tortuous sound attenuating passages positioned in the airway intermediate the air ltering means and the air temperature controlling means and air moving means positioned in the casing to draw air through the air ltering means and discharge it into'the sound attenuating passages. f

l2. A ventilator and air conditioning unit which comprises a casing divided into front and rear compartments respectively provided with an outlet opening and an inlet opening, air filtering means positioned adjacent the inlet opening, air

moving means positioned in-the rear compartment adapted to draw air through the inlet opening and lter means, tortuous, sound attenuating passages formed in the front compartment and communicating between the air moving means and the outlet opening, and air temperature controlling means associated with the outlet opening.

3. A ventilator and air conditioning unit which comprises a casing divided longitudinally into front and rear compartments, an inlet opening formed in the casing for admitting air to the rear compartment, air ltering means positioned adjacent said opening, aiL moving m'eans positioned in the rear compartment below the ltering means adapted to draw air through the inlet opening and filter means and discharge it into the front cornpartment, an outlet opening formed in the casing, tortuous sound attenuating passages positioned in the front compartment through which the air passes from. the air moving means to the outlet opening, and air temperature controlling ,means positioned betweenl the sound attenuating passages and the outlet opening.

4. A ventilator and air conditioning unit which comprises a casing, divided longitudinally into front and rear compartments, an opening formed in the rear wall of the casing to admit air to the rear compartment, an air lter positioned in the rear compartment adjacent said opening, a plurality of fan blowers positioned in the rear compartment below the air lter adapted to draw air through said opening and air iilter, a plurality of tortuous sound attenuating passages positioned in the front compartment and in communication with the fan blowers, an opening in the top of the casing and temperature controlling means positioned in the front compartment between the sound attenuating passages and the last named openingto regulate the temperature of the air as it issues from the casing.

5. A Ventilating and air conditioning unit which comprises a casing having front and rear Walls and an intermediate hinged partition dividing the casing into front and rear compartments, said front wall being removable, an opening formed in the rear wall adjacent the top of the casingto admit air to the rear compartment, a strip of air filtering material positioned in zigzag formation lengthwise of the rear compartment immediately below said opening, a plurality of fan blowers positioned adjacent the bottom of the rear compartment and adapted to draw air through said opening and said ltering material, a plurality of openings formed in Athe intermediate partition through which the air is discharged by the fan blowers into the front compartment, a plurality of partitions secured toand carried by the removable front vwall of Vthe casing forming a plurality of tortuos sound attenuating passages in `the i ront compartment, an opening formed in the top of the casing, and pipes positioned longitudinally of the front compartment 'to regulate the temperature of the air as it passes from the sound attenuating passages to the last named opening.

6. A Ventilating and air conditioning unit which i ROLAND B. BOURNE. HIRAM H. MAXIM.