US1896081A - Condenser - Google Patents

Description

Feb. 7, 1933. A, HAMPSON 1,896,081

CONDENSER Original Filed Oct. 10, 1927 Patented Feb. 7, 1933 UNITED STATES PATENT OFFICE EDWARD A. HAMPSON, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE HOOVER COMPANY,

A CORPORATION OF OHIO v CONDENSER Original application filed October 10, 1927, Serial No. 225,152, and in Great Britain July 5, 1929. Divided and this application filed October '19, 1929. Serial No. 400,782.

This invention relates to refrigeration units and more particularly to household units of the air-cooled condenser type.

An object of the invention is to improve the cooling effect on the parts of the unit by circulating air thereover in a novel manner and to provide a construction wherein the parts are so arranged as to facilitate the cooling action.

A further object of the invention is to provide a construction for a mechanical refrigeration unit such that not only the condenser, but also the compressor and motor thereof are cooled, means being provided for causing a positive circulation of air over all of these parts.

A further object is to provide a large effective area of surface contact between the condenser and the circulating air so as to cause a large amount of heat to be transferred from the condenser to the air.

The present invention is particularly concerned with the utilization of a fan for creating a forced draft of air as distinguished from a natural air circulation like that dis? closed in Figure 3 of my copending application Serial No. 225,152, filed October 10, 1927 from which the present application is a division.

Other objects and advantages will appear hereinafter.

In the drawing accompanying this application, Figure 1 is a longitudinal cross-sectional View of a refrigerating unit embodying the principles of the invention.

Figure 2 is a transverse cross-sectional view taken on the line 2-2 of the embodiment shown in Figure 1.

As shown in the drawing the apparatus comprises an electric motor 10, a compressor 12, a condenser and means for cooling these parts. The complete unit also includes an evaporator and an expansion valve, but since these parts do not form part of the present invention they are not shown herein and may be of any known construction.

The compressor 12 is connected to the evaporator (not shown) of the system by an inlet pipe 13 and discharges into an outlet pipe 14 which is connected to the inner coil 15 of the condenser by a pipe 15. In addition to the coiled pipe 15 the condenser also includes an outer coiled pipe 16, these two coils being concentrically disposed about the compressor and motor and extending from end to end thereof, as shown. The two, coils 15 and 16 are connected together by the pipe 16' shown in full lines in Fig. 1, and in dotted lines in Fig. 2. The outlet end of the condenser coil is shown at 16". Between the two coils 15 and 16, a shell 17 is provided this shell serving to separate the two sets of coils 15 and 16 and also serving to guide air current over the condenser coils. Outside of the outer condenser coil 16, there is provided a further shell 18, which also serves to direct air currents about the coils, the shell 18 being provided with a head 19 which head 19 further serves for directing the air currents relative to the coils.

The shaft of the electric motor 10 supports an air propelling member 20 shown as a centrifugal fan. While the fan as shown in the drawing, is connected to the end of the motor shaft remote from the compressor it will, of course, be perfectly obvious that the fan may be connected tothe drive shaft somewhere between the motor and the compressor casing, and that the fan may be of any type which will cause air to be propelled through the channels formed by shells l7 and 18 and head 19.

As shown, the motor 10 and compressor 12 are mounted on a base plate 21 in order that the unit may be conveniently mounted. Attached to the base, at the ends of the unit, plate bracket members 22 provide means for securing the unit to the structure upon which it is to be mounted.

When electric motor 10 is operating to drive compressor 12 and compress a refrigerant, fan 20 will be rotated and as shown in the drawing air will be drawn through the inner shell 17 from the compressor end, and in passing through this shell will more or less cool the compressor, the motor and the inner condenser coils, the air then passing into the space between shells l7 and 18 and back to the compressor'end to cool the outer condenser coil in its passage tln'ongh the space between the two shells lln order to prevent any appnecialile tendency to term a more 01' less closed ail-"circuit from the space between these shells back into the inner central space the lips of shells l?! and 18, at their open ends are shown. as somewhat tlared outwardly as at 23 so that the Warm air Will be directed from the central intake llfhile only one embodiment o the inven tion has been described in this app ication it is obvious that various changes may he made in the details of the construction. and an rangenient of parts Without departing from the spirit of the invention 01 the scope of the annexed claims I claim:

1. ln reti'ioeiatinp' a JilliLlJuS the comb? nation of a condenser including a plurality of concentrically disposed elements, each element having its radiating surlace arranged to describe a cylindrical surface, a c ylindiically shaped loaille interposed be; seen said elements and a tan adapted to circulate air over said elements in ditlcrent directions.

2. A condenser for a refrigeration unit, comprising a, plurality o'l coils substantially parallel one relative to another and adanted to surround a in otor coni oi'essoi' unit peripherally, means for connectinn said coils, and guide means including a ba tle between seid coils, for directing the ow of ain tliei'eovei'.

Signed. at Chicago, the county of Cook, and State of Illinois this 10th clay Uctoher A, D,

Images