US1813692A - Air conditioning apparatus - Google Patents

Description

S. M. ANDERSON AIR CONDITIONING APPARATUS July 7, 1931.

Patented July 7, 1931 STATES PATENT OFFICE SAMUEL M. ANDERSON, OF HYDE PARK, MASSACHUSETTS, ASSIGNOR TO B. F. STURTE- VANT COMPANY, OF HYDE PARK, MASSACHUSETTS, A CORPORATION OF MASSA- CHUSETTS AIR CONDITIONING APPARATUS Application mea June 11,

The present invention relates to air conditioning apparatus such as heaters, coolers, humidifiers, and the like.

The object of the present invention is to reorganize and improve air conditioning apparatus particularly with a view to fiexibility of construction and assembly, whereby stock units may be assembled and combined in any desired number.

w. With this object in view, the present invention consists of the air conditioning apparatus hereinafter described and particularly defined in the claims.

The drawing is an elevation partly in sec- E tion of air conditioning apparatus embodying the features of the present invention.

The invention comprises a plurality of units which include one or more humidiiers or Washers and one or more temperature controlling units such as heaters or coolers. As

shown in the drawing, the invention is embodied in an apparatus having a single humidifier and a single heater. The humidifier or Washer is indicated at 2 and is of the general type disclosed in my co-pending application Serial No. 323,951, filed December 5, 1928.

Briefly, this type of Washer comprises a plurality of rows of nozzles 4 each including 3@ a number of air tubes 6 associated with water tubes 8. The air and Water tubes have 0pposed openings whereby the suction produced y the passage of air across the openings of the Water tubes acts to disperse the Water in a tine spray through the chamber.

The washer is provided with an inlet filter 10 and an outlet filter 12. These lters are primarily for the purpose of eliminating dust and entrained particles of water. These ilters may be of any suitable form but are preferably of metal wool presenting a large number of interstices through which the air may pass in tortuous paths, On the inlet side of the washer is a propeller fan 14 driven by a motor 16.

Following the Washer is an air heater indicated generally at 18. Inasmuch as it is 'delsirable to manufacture certain standard forms of units for assembly in any desired y 5@ combination, each unit is supplied with its 1929. Serial No. 370,069.

own fan. Thus, for the heater there is provided a fan 2O of sufficient size to overcome the resistance of the heater. The fan is driven by a motor 22. As shown in the dra-wing, the fan 14 1s of sufiicient slze to overcomeV the resistance of the washer and the filters while the fan 20 is large enough to overcome the resistance of the heater. By the use of individual fans, each unit may be constructed and designed to operate with a fan of a certain size and the assembly need not be altered to permit the addition of other units as would be necessary if fans of different sizes were employed to overcome the resistances of a variable number of units.

The operation of propeller fans in series has proven difficult because of the fact that each fan produces a spin in the fluid. This spin is a necessary incident to work done by the fan. In fact, the amount of spin increases as the power output of the fan increases. The presence of a spin component in the inlet of a fan, however, introduces difficulties in the operation. Thus, when two fans are mounted for series operation, the spinning air from the first fan necessarily passes to the inlet of the second fan. If both fans rotate in the same direction, the capacity of the second fan for overcoming resistance is materially reduced, whereas if they rotate in opposite directions, the tendency is for the second fan to take an excessive proportion of the load.

According to the present invention, the filters 10 and 12 not only serve the purpose of removing dust and entrained water from the air, but also damp out the spin component of velocity so that the air fiows to the second fan in substantially a straight axial stream. Inasmuch as the lters are of some thickness, they effectively prevent the transverse flow of air to which the spin component gives rise. Thus, the resistance `to transverse fiow is sufticiently high to remove the spin without, however, interposing an excessive resistance in the path of general axial flow of the fluid.

Although the preferred form of nozzle is of the type described in the oopending application above referred to, the present -invention is not limited to such specific nozzle but may' employ any suitablelwater -spraying or atomizing means.

The invention having been thus described, what is cl uned is: (A

l. Air conditioning apparatus comprising a pluralityof airA conditioning units including a humidifier unit, a propeller fan for each unit, the humidifier unit being disposed between successive fans, and means located between the fans for damping the spin velocity :'ntroduced into the air stream of vthe rst 2. Air conditioning apparatus comprising a plurality of air conditioning units including a humidiier unit, a propeller fan for each unit, the humidifier unit being disposed between' successive fans and includinga filter for removing dust and entrained water particles and having a high resistance to transverse fiow of air to remove the spin from the air stream introduced by one of the fans.

3. Air conditioning apparatus comprising an air washer unit, a temperature controlling unit, a fan for each unit, the washer unit being disposed between the fans and including a ilter for removing dust and entrained water and for damping the spin velocity introduced into the air stream by the first fan.

In testimony whereor`- I have signed my naine to this specifica-tion.

SAMUEL M. ANDERSON.

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