US2474109A

US2474109A - Refrigerated fan guard

Info

Publication number: US2474109A
Application number: US687084A
Authority: US
Inventors: Nellie G Keller; William J Keller
Original assignee: Individual
Current assignee: Individual
Priority date: 1946-07-30
Filing date: 1946-07-30
Publication date: 1949-06-21
Anticipated expiration: 1966-06-21

Description

June 21, 1949. N. G. KELLER EI'AL 7 0 7 REFRIGERATED FAN GUARD Filed July 50, 1946 2 Sheets-Sheet 1 mmvroas: 2 v #54415 G/fELLEe BYW/LL/fl/V .1 #511512.

June 21, 1949. N. G. KELLER ETALY 2,474,109

' REFRIGERATED mm GUARD Filed July 30, 1946 '2'Sheets-Sheet 2 INVENIORS/ WELL/E 6 Kali EVE.

BW/MLMM Ji 44%.

Patented June 21, 1949 UNITED STATES PATENT bodying the features of the invention.

OFFICE REFRIGERATED FAN GUARD Nellie G. Keller and William J. Keller, St. Louis, Mo.

Application July 30, 1946, Serial No. 687,084 1 Claim. (01. 257259) This invention relates to electric fan guards, 'Fig. 2 is a sectional view taken on line 2-2 and, more particularly to a refrigerated fan of Fig. 1. guard. Fig. 3 is a rear elevation of the fan guard.

An object of the invention is to provide a re- Fi 4 is a side elevation of he f n ar frigerated fan guard embodying an evaporator of 5 Referring to the drawings, the fan blade guard a type wherein a continuous circulation, in a consists of a skeleton wire guard structure dessinuous path, can be maintained by using a liquid ignated, generally as A, and an evaporator des-' refrigerant. ignated, generally as B.

A further object of the invention is to provide The skeleton wire structure A in the embodian electric fan guard with an evaporator in, which m n h w pri s a p i y f spaced heat from a continuous passing flow of air therecentrically arran ed front W r rings I, 2 and for is chilled as it passes over and around the 3. a plurali y of sp e concentrically r n evaporator so that the temperature of the air r ar wir rings 4. 5 and 6, which ar spa a sui delivered by the fan blades will be reduced over ble di anc o he rear of the rin s 2 and the customary method of cooling withafan with- 16 3. A plura i y o Wire members including a cut an evaporator forming a part of the guard straight front section 1 having a cur ed Out r structure. end section 8, serve as connecting braces between According to the present invention, the evapthe fron n s I. Z and 3 and the rear Oute orator is an independent unit supported 'by a n h rings I, 2 a 3 a s y Secured skeleton wire fan guard providing thereby a cir- 20 to the section 1 and the ring 6 is suitably secured culatory system in a fan created air flow and to the free end of the curved section 8 by means within the bounds of the outside diameter of such, for instance, as solder, or spot welding. A the fan guard. suitable wire ring 9, which forms the outer diam- A further object of the invention is to provide eter of the skeleton guard, connects the curved an evaporator unit formed of tubing and desections 8 at the highest points thereof, and the signed to include a plurality of spaced sections, ring 9 is secured to the curved sections 8 by varying in length, connected by end bends, and means such, for instance, as solder, or spot weldhaving a general circular formation in front ing to further reinforce and strengthen the skelelevation. eton guard structure. A plurality of suitable A further object of the invention is to provide V-shaped wire members l0 having a loop, or a fan blade guard for electric fans with an fastener receiving eye II are secured to the rear evaporator, or cooling unit in which a liquified

rings

4, 5 and 6- The memb rs 0 ar i ly refrigerant is permitted to vaporize, and which s cured to t e ea

ngs

4, 5 a d 6 y means can be connected with either an absorption re- Such, for instance, as solder, or spot e d frigeration apparatus, or a refrigerating unit em- 86 h membe s l a adapted to be Secured t0 ploying a compressor, so that the flow f air an electric fan motor I: by means of suitable currents delivered by the fan blades will be fa rs l3 osupport the skeleton guard in D hi1] d sition relative to the motor and to the fan blades A further object of t invention is t 13 0- H which are housed within the guard structure d an arrangement of a fan bl d guard for 40 and driven by the motor for delivering a continuelectric fans and an evaporator, or cooling unit, 0118 flow of a y from the wherein a refrigerant is permitted to vaporize, he evapo ator desi na ed, gene a ly asB comand where the expansion of the refrigerant vapor prises a. sin le tub p p conduit, and, in 1Zhe absorbs heat from passing air to reduce the temdim Shown. includes a plurality of suitperature of air currents delivered by the fan ably spac d strai h ri n al o s r un blades. I! of various lengths on opposite sides of the With the above objects in view, together with horizontal center line of the evaporator. The such other objects and advantages as may subsections I! are connected at their ends by curved sequently appear, the invention resides in the bends ii, the outer ends of which are confined t and n th mbin tion, construction and within the bounds of the outside diameter of the arrangement of the parts hereinafter described skeleton guard A so that the evaporato W pand claimed. and illustrated by way of exampear as of round or circular outline in front and ple in the accompanying drawings, in which: rear elevation. .One of the end sections of the Fig. 1 is a front elevation of a fan guard emevaporator is preferably bent, as at IT, provid 4 ing thereby a rearwardly projecting section It suitable refrigeration apparatus, not shown, and the of the evaporator is bent, as at 19, providing thereby a rearwardly projecting section 20 for connection with the refrigeration apparatus. The refrigerant employed is introduced into one end. or the other of the evaporator from the refrigeration apparatus and permitted to vaporize in the sinuous circulatory path through the evaporator where the expansion of the refrigerant vapor will absorb heat from passing air delivered by the fan blades and thereby chill, cool, or in other words reduce the temperatureof the air delivered past the evaporator by means of the fan blades. The evaporator -is shown a'sdished due to curved bendportions being curvedrearwardly, as at 2|. From the foregoing description, it will be ape parent refrigerated air will pass from the evaporator and be carried therefrom into the room in front of the. fan.

The many advantages of the herein described invention will be apparent to those skilled in the art to which it appertains.

what we claim is:

An evaporator cofl adapted to bemounted upon and fixed to the front face of an electric fan guard, said coil comprising a single length of tubing formed to provide spaced straight horizontal runs of various lengths on opposite sides of the horizontal centerline of the evaporator, said runs connected at their ends bycurved bends, and the horizontal runs adjacent the curved bends beins curved rearwardly to arrange the curved bends to lie in a circular outline to the rear of the spaced straight horizontal runs.

NELLIE G. KEILER.

WILLIAM J. KELLER.

REFERENCES CITED The following rei'erenices are of record in the flle of this patent: I

UNITED STATES PATENTS Gardes Nov. 26, 1946