US2884228A - Air conditioning units - Google Patents

Description

A ril 28, 1959 R. JORGE NSEN AIR pomarriowmc UNITS s Sheets-Sheet 1 Filed Jan. 3. 1956 p i 1959 R. JORGENSEN 2,884,228

AIR CONDITIONING UNITS Filed Jan. s, 1956 '5 Sheets-Sheet 2 12 I v /4Z IN VEN TOR. mnrr lilac/view I HTTOAIVEYS R. JOIR'GEN'SEN AIR CONDITIONING UNITS April 28, 1959 3 Sheets-Sheet 3 Filed Jan. 3, 1956 F/GIOT INVENTOR. Ross" JCIPENS'E/V I J BY I United States Patent 2,884,228 AIR CONDITIONING UNITS Robert Jorgensen, Kenmore, N.Y., assignor to Buffalo Forge Company, Buffalo, NY.

Application January 3, 1956, Serial No. 556,858

Claims. (Cl. 257-9) lvfy invention relates in general to air conditioning units and in particular to such units as are provided with temperature controls.

As is well known to those skilled in the art, the control of the air temperature in present day units may be accomplished by use of face dampers and of bypass dampers, which method requires either the addition of a bypass duct on the outside of the unit, a bypass duct separate from the unit, or the reduction of coil face area in the provision of an internal bypass duct. Furthermore, in some present day units it is necessary, because of the arrangement, to incorporate a heating coil with a face area equal to the face area of the cooling coil while in other arrangements it is possible to'incorporate a heating coil with somewhat less face area than that of the cooling coil but only at the expenses of additional cabinet W01 The principal object of my invention is to overcome the disadvantages above mentioned and to provide a unit of relatively compact structure at reduced cost.

Another object is to provide the cabinet with a cooling coil arranged at an angle, thereby providing a triangular space between the upper end of the coil and the outer wall of the cabinet which is utilized as a bypass duct without requiring any additional ducts or the reduction of the face areas of the coils.

A further object is to arrange the heating coil at an angle to the cooling coil thereby providing an air chamber between the coils.

Moreover, it has been an object to provide a structure in which the heating coil may have less face area than the cooling coil without the necessity of additional cabinet work, thereby insuring that the entire face areas of the cooling and heating coils will be exposed to the treated air.

While I have shown my invention as applied to central station equipment, it is obvious that it is applicable also to self-contained units. The above objects and advantages have been accomplished by the device shown in the accompanying drawings, of which:

Fig. 1 is a side sectional elevation of my invention;

Fig. 2 is a sectional plan view taken on line IIII of Fig. 1;

Fig. 3 shows in diagrammatic manner a device similar to that of Fig. 1 illustrating the use of a mixing box;

Figs. 4 to 6, inclusive, show in diagrammatic manner various forms of the invention in which the various parts are located in different positions; and

Fig. 7 is a diagrammatic view of a further modification of my device.

My device comprises a casing 10 preferably of rectangular shape having a short front wall 11 and a full length rear wall 12. A top 13 extends from the front 'wall to the rear wall, and the bottom 14 of the casing forms a pan. End walls 15 and 16 serve to enclose the casing. The casing is provided preferably with an extension 20 of rectangular shape arranged at right angles to the casing '10 and located below the lower end of the wall 11. This extension is bounded on the lower side of the bottom 14 and on the other side by a top wall 38, and provides an air inlet opening 21. Arranged in the inlet opening are filters 22 and this opening is divided substantially into a face opening 39 and a bypass opening 40. The casing '10 with the extension'20 shaped housing having the inlet opening in one leg forms an L- any suitable means.

thereof and the outlet opening in the other leg thereof. The legs of the casingare joined together at the inner and outer corners-47 and 48, respectively. Face dampers 23 are arranged in the face opening 39; and, as is customary, these face dampers are each provided with an actuating arm 24 each of which is pivotally secured to an actuating rod 25, whereby the dampers may be opened or closed in unison.

The casing is formed with a lower chamber 26 and with an upper chamber 27. The cooling coil 30 of my device is arranged in the lower chamber 26 of the cabinet and is inclined at an angle of substantially 45". This coil may be made in two sections 31 and 32, as shown in Fig. 1. Because of the angular arrangement of the cooling coil, theupper frame 33 of the coil 31 is spaced from the lower edge of the front wall 11 and from the inner corner 47 of the casing, thereby providing a bypass 34 extending from end to end of the casing. The upwardly extending frame 33 and the wall 35 form a partition dividing the upper chamber 27 from the lower chamber 26. The bypass opening is bounded on its lower side by a wall 36 which extends rearwardly to the frame 33 ofthe cooling coil 30. The entrance 40 to the bypass 34 is provided with an adjustable bypass damper 41 which is mounted upon a pivot 42. An arm 43 is car- Y ried by the pivot 42 and a link 45 serves to connect this arm-with an arm 44 carried by the pivot 46 of the upper face damper 23. Bygthis arrangement, when the face dampers are actuated to closed'positions, the bypass damper will be moved to openposition 'or vice versa, whereby the incoming air may be graduated to flow through the face dampers and/ or bypass dampers to suit existing conditions. I

Extending across the upper chamber of the casing from the wall 35 to the rear wall 12 of the unit is the heating coil 37 of my device. Obviously, air passing through the face dampers 23 will be projected against and passed through the cooling coils 31 and 32 and thence upwardly through the heating coil 37. It will be seen that in all forms of my invention, the cooling coil is arranged at an angle to the heating coil and is in spaced relation therewith, whereby an equalizing chamber 50 is provided which permits a smaller heating coil to be used while achieving a substantially equal distribution of air across the same, thereby economizing in the cost of construction. In the operation of my device, if the air passing through the cooling coil is below the desired temperature, the face dampers will be partiallyclosed and some air will be passed through the bypass 34 thereby bringing the air to the desired temperature. Obviously, the dampers are controlled by suitable and well known thermostat means (not shown), suitably located. The heating cycle may also be controlled by suitable thermostat means (not shown). Air is drawn into and through the casing by means of a centrifugal fan 51 which is actuated by The fan is connected to the space serviced by the unit by well known duct means (not shown).

The unit is shown in Fig. 3 as similar to that shown in Fig. 1 except that a mixing box 52 is located in front of the air inlet to the casing and it is provided with two inlet ducts 53 and 54, each provided with dampers 55, the duct 53 being connected to the room being serviced, and the inlet duct 54 being connected to air from outside atmosphere. Obviously, by means of the dampers 55, the desired amount of room air and fresh air may be supplied to the casing.

The form of invention shown in Fig. 4 illustrates a construction in which the filters are disposed in the mixing box and are arranged at an angle to each other. This form of invention also shows the face damper and bypass damper as located above the cooling coil and between this coil and the upper chamberof the casing.

Fig. shows a construction similar to Fig. 1 except that the mixing box is arranged above the casing and the fan is located in a horizontal extension of the casing which also contains the heating coil.

Fig. 6 shows a form of invention similar to that illustrated in Fig. 5 except that the heating coil is arranged on the inlet side of the cooling coil instead of the outlet side thereof, and the dampers are on the outlet side.

The modification shown in Fig. 7 is applicable to installation where various other forms of control are utilized, for instance, a modulation of the temperature of the heating and cooling medium supplied to the coil, or

the quantity of medium supplied thereto. In either of the above modifications, the bypass with the damper together with the face damper may be omitted. As shown in Fig. 7, a baffle 56 is provided which extends from the frame 33 of thecooling coil 30 to the adjacent part of the casing, whereby all of the air treated by the unit is passed through the coils. 7

While I have shown and described the cooling coil as being arranged at an angle of susbtantially 45, it is obvious that similar advantages may be accomplished by arranging the coil at a different angle, provided ample space is allowed at one end thereof for the bypass. Furthermore, my invention is applicable to units which are not provided with a heating coil.

These and other modifications of my invention may be made without departing from the spirit thereof or the scope of the appended claims, and I do not wish to be limited to the exact embodiment shown and described.

What is claimed is:

1. An air conditioning unit comprising a substantially L-shaped casing having an inlet opening formed in one leg thereof and an outlet opening formed in the other leg thereof, said leg portions being united at their inner and outer corners, a heating coil mounted in said casing, a cooling coil mounted in said casingin spaced relation to said heating coil and arranged at an angle of substantially 45 with the exposed face of said heating coil and with the walls of said casing, thereby forming an equalizing chamber between said coils, one end of said cooling coil being disposed substantially adjacent the inner corner of said leg portions, said cooling coil having a face area greater than the face area of said heating coil, said inlet opening comprising a face opening substantially equal in area to the projected area of said cooling coil and a bypass opening separate from and adjacent to said face opening, and means for causing circulation of air through said casing.

2. An air conditioning unit comprising a substantially L-shaped casing having an inlet opening formed in one leg thereof and an outlet opening formed in the other leg thereof, said leg portions being united at their inner and outer corners, a heating coil mounted in said casing, a cooling coil mounted in said casing in spaced relation to said heating coil and arranged at an angle of substantially 45 with the exposed face of said heating coil and with the walls of said casing, thereby forming an equalizing chamber between said coils, one end of said cooling coil being disposed substantially adjacent the inner corner of said leg portions, said cooling coil having a face area greater than the face area of said heating coil, a fixed partition arranged at the upper end of said cooling coil and arranged perpendicularly to the exposed face thereof, said inlet opening comprising a face opening substantially equal in area to the projected area of said cooling coil and a bypass opening separate from'and adjacent to said face opening, said partition terminating at said inlet passage and separating said face opening from said bypass opening, and means for causing circulation of air through said casing.

3. An air conditioning unit comprising a substantially 4 L-shaped casing having an inlet opening formed in one leg thereof and an outlet opening formed in the other leg thereof, said leg portions being united at their inner and outer corners, a heating coil mounted in said casing, a cooling coil mounted insaid casing in spaced relation to said heating coil and arranged at an angle of substantially 45 with the exposed face of said heatingcoil and with the walls of said casing, thereby forming an equalizing chamber between said coils, one end of said cooling coil being disposed substantially adjacent the inner corner of said leg portions, said heating coil having a face area substantially equal to the projected face area of said cooling coil, said inlet opening comprising a face openingsubstantially equal in area to the projected area of said cooling coil and a bypass opening separate from and adjacent to said face opening, and means for causing circulation of air through said casing.

4. An air conditioning unit comprising a substantially rectangular casing having walls formed with inlet and outlet passages arranged at substantially right angles to each other, said casing having inner and outer corners at 0pposite spaced points, a cooling coil mounted in said casing and having its exposed faces arranged at an angle of substantially 45 to the direction of flow of air through said inlet passage, said coil being located in the space between said corners, a fixed 'imperforate partition disposed at the upper end of said coil and extending substantially the width of said casing, said partition forming a wall defining a bypass opening, said partition being substantially perpendicular to the exposed faces of the coil and being opposite to and spaced from the inner corner of said casing at the inlet side thereof and thereby forming a bypass about said coil, said inlet passage having a face opening substantially equal in area to the projected face area of said cooling coil and separate from and'arranged adjacent said bypass opening, said partition terminating at said inlet passage, and means for causing circulation of air through said casing.

5. An air conditioning unit comprising a substantially rectangular casing having walls formed with inlet and outlet passages arranged at right angles to each other, a cooling coil inserted in said casing to substantially bisect the right angle and having its exposed faces arranged at a common angle of substantially 45 to the directions of flow of air both from said inlet passage and to said outlet passage for locating the cooling coil on a median plane between the two directions of air flow, a fixed imperforate partition disposed at the upper end of said coil and extending the longitudinal width of said casing, said partition being arranged substantially perpendicular to the exposed faces of the coil and being opposite to and spaced from the inner corner of said casing at the inlet side thereof, said inlet passage comprising a face opening substantially equal in area to the projected area of said cooling coil, said fixed imperforate partition defining a bypass opening about the cooling coil with its minimum face dimension intersecting the median plane, said partition terminating at said inlet passage and separating said face opening from said bypass opening, and means for causing circulation of air through said casing.

References Cited in the file of this patent UNITED STATES PATENTS 1,605,119. Lewis Nov. 2, 1926 1,849,061 Anderson Mar. 15, 1932 1,927,869 Downs Sept. 26, 1933 2,079,562 Olson et a1, May 4, 1937 2,093,691 Buder Sept. 21, 1937 2,283,928 Huggins May 26, 1942 2,327,663 Otis Aug. 24, 1943 2,739,794 Graham Mar. 27, 1956 2,743,908 Tanner May 1, 1956 FOREIGN PATENTS 379,663 :Great Britain Sept. 1, 1932

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