US2550573A - Whirler spray nozzle with overhanging lip - Google Patents

Description

April 24, 1951 s, L'YMAN 2,550,573

WHIRLER SPRAY NOZZLE WITH OVERHANGING LIP Filed Oct. 5, 1946 iLi MWA/rm, Salma?? Lyman Patented Apr. 24, 1951 onirico srAres Param ortica vVHIRLER- SPRAY NOZZLE WITH., OVERHANGIN'GI. LIll Samueliliyman; Union; N. J., assigner toBuensod- Stacey, Inc.,.New York; N.. Y., a corporation of Delaware'- Applicationctober 5, 1946-Serial No. 701,514

(Cl. 29,9.;--11M lClaim. l.

My presentv invention relates tov spray nozzles Ofthe' type having a whirlingA chamber and' aims to provide certain improvements therein;

Various forms of" spray nozzles kwith whirling chambers have' heretofore been made and used for' special purposes includingv use in air condi'- tioning apparatus. Where used in air conditioning; apparatus` the. spray head of' the nozzle is usually designed' to discharge water inthe form of' a rotating hollow cone which, as' thel wall' of the cone thins out as it moves outwardly from the .spray heady will rupture and. break into' tendrils, and' then into drops which, in turn, are

atomi'zedby the action oi the air. In all nozzles of' this, type with which I am familiar, the apex angle of' the conical` spray doesnot exceed 90; thus providing but limited wetting area:` when used in. air conditioning apparatusor the like.

My invention has for'its primary object to provide nozzles of' the character setforth which will provide. conical' sprays ofA large apex angle and hence require fewer nozzles to wet a predetermined, area when disposed at a predetermined distance from said surface to be wetted. A further object is totprovide such nozzles which, in

ther object is to provide nozzles oi.- the'character set forth whichlwiliconsist of but two parts which are simple to manufacture and which can be readily-and cheaply assembled-i The' foregoing and other objects of my invent-i'brrnot specicallyenumerated' I'accomplish by providingy a nozzle` consisting of' a body member hav-ing a whirling chamber and 'a spray head having: an axial discharge passageI or oricehaving' a conical portionv` which mayy be either concentric or eccentric'with the axisv of the whirling chamber;I the conicaldischarge orice leading outwardly from said" whirling chamber. Preferably, the conical' discharge orice has an axial dimension which' is less than its diameter at the discharge end, and an apex. angle greaten thanA 909'.. Said, conical discharge orice mayv also have an overhanging lip at its discharge end for aiding in atomizing at least part of the water being discharged. The invention will be better understood from the detailed description which follows, when considered in connection with the accompanyingr drawings showing two embodiments. wherein:

Figure 1 is a top plan view, with a part thereof lli f a broken awa-y; ofi one form ofV spray. nozzle. em;- b'odfying' m-y7 invention. 1

Figi 2`-1is a sectiontaken substantially. along. the plane*v otY the lined- 2 ofF-ig. 1'.

Fig: 5l is a tcpl plan View with a part thereot broken away; of anotherv form ofV spray nozzle embodying-myv invention.

Fig. lV is a section taken substantially along the plane of the line 44. ofv Fig; 3.

Referring 'rst to-Figs; 1 and 2` of the drawing the nozzle therein disclosed comprises a subistantiallycylindrical housing lhaving a cylindrical whirling chamber Hl therein, theY open end ofV the housing` being internally screw-threaded as'indicated'atA l2 to' accommodate a spray head f3". `'The housing' l0 has` integrally formed and extending laterally therefrom, intermediate its ends and offset with respect tothe' axis of the housing, an inlet nipplev i4, the outer: end of' which. is externally formed with wrench-engaging Ysurfaces I5 and internally formed with screw@ threads I6. The inletY nipple has a passage or duct' l1 extending therethrough, which, at its inner endextends' substantially tangentially to the, cylindrical Wall of the chamber' ilr so that waterr underv pressure, upon entering the chamber H through said duct will be'caused' to follow the cylindrical wall of the chamber and thus be given a whirlingy motion.

The spray head I3 is of generally tubular form, has an' enlarged flange i8 at one end. an externally screw-threaded portion I9'below saidv ange for engagingv the screwethreadsl2 `of the housing; and* inwardly beyond" the screwethread'edportion i9' is of' reduced diameter as' indicated at 20", so

that whenY the spray head is screwethreadedly connected to the housing the inner end" of' the spray head will extend' into chamber l i in; spaced relation to the' cylindrical wall thereof, bevond the tangential'passage or duct I1 andin spaced' relation to the bottom ofthe chamber. -The' bore or orice through the' spray head" for a substantial portion of its length extending from its inner end' outwardly is cicylindrical form as shown at 2| and merges through a curvedisurf'ace 21a into a conical bore portion 22' which is ofv maximum diameter at the outer or discharge end ofthe spray head. Preferably, the axial dimension a` of the conical bore portion is less than the maximum diameter of said conical bore. The apex angle of the conical bore portion 22 may be of any desired degree, although it is preferable that said apex angle should be greater than 90 so as to provide a conical spray which will have a large base area at a relatively short distance from the spray head. I have found that a spray head with a conical bore apex angle of approximately 110 is especially suitable for nozzles for use in air conditioning apparatus.

In the embodiment of my invention shown in Figs. 3 and 4, a housing 23 has a generally cylindrical portion 29 which is internally screwthreaded at 25, and below said screw-threaded portion is formed with a flat bearing wall 26. Below the flatbearing wall the housing 23 has a Substantially cylindrical portion 27 eccentrically disposed in relation to the cylindrical portion 24 and is formedY with a cylindrical whirling chamber 28 which is eccentrically disposed with respect to the axis of the housing portion 24 in the same relation as is the cylindrical housing portion 2l. Integrally formed with the housing 23 and extending laterally therefrom is an inlet nipple 29 which is offset on the same side of the axes of the housing portions 24 and 2? and terminates in a sornewhatenlarged wrench-engaging end 30. The inlet nipplehas -extending therethrough an axial duct or passage 3|, which, at its inner end, leads into the chamber 28 and is substantially tangential to the cylindrical Wall thereof. 4At its outer end the passage 3l is enlarged and internally screw-threaded, as indicated at 32, to provide means for connection with a source of water supply.

Removably tted within the housing 23 by engagement with the screw-threads 25 is a spray head 33, the inner end of which is adapted to bear against the dat surface 26, said sprayhead having an axial bore therethrough, the inner end portion of which is of cylindrical form, as indicated at 34, and the outer portion of which is of generally conical form 35 leading from the cylindrical portion and extending outwardly with the greatest diameter of the cone adjacent the discharge end 'oi the spray head. In this embodiment as in Fig. 2, the axial dimension b of the conical portion 35 is less than the maximum diameter of the conical bore. Preferably; however, at the discharge end of the conical bore of the spray head said head is formed with an overhanging annular lip 35 the inner wall of which is of conical form in inverted relation to the conical discharge hassage'35.

Comparing Figs. 2 and 4, it will be noted that in Fig. 2 the discharge bore or orifice through the spray head is coaxial with the chamber H, and the cylindrical portion 2i of said spray head orice is of larger diameter than the inletpassage or duct Il, while in Fig. 4 the discharge passage or orice in the spray head is eccentric with respect tothe axis oi the chamber 2S and the cylindrical portion 34 of said passage is of smaller diameter than the inlet passage 3i. These dir"- erences in construction arise from the fact that the embodiment of my invention sho-wn in Figs. 1. and 2 is intended for low pressure operation, that is, with pressures between and 10 p. s. i., and the embodiment shown in Figs. 3 and 4 is intended for use with relatively high pressures, namely to 40 p. s. i. i

In the use of the nozzles hereinbefore described, water, upon being admitted under pressure into the respective chambers Il and 28,

is given a whirling or rotating action which causes the water to develop a vortex and pass outwardly through the cylindrical portion of the spray head and then, due to the centrifugal force of the water, along the conical portions thereof to be discharged in a conical spray. Although atomization of the discharged water cone will take place in both types of spray heads at varying distances from the discharge orioe depending upon the apex angle and the pressure of the water, the overhanging lip construction of Fig. 4 will serve to create additional atomization immediately beyond the discharge end of the spray head due to the breaking of a portion of the conical film of the water into droplets upon being forced over said inturned lip.

Although the particular nozzles herein disclosed are intended for use in air conditioning apparatus, the form shown in Figs. 1 and 2 for Vhumioliers and the form shown in Figs. 3 and 4 v for air washers, it is to be understood that no limitation is herein claimed for the use of the nozzles per se. y

It will be further understood that while I have shown and described certain preferred embodiments of my invention I do not wish to be limited to the specific constructional details disclosed, since these may be varied within the range of engineering and mechanical skill without departing from the spirit of my invention as dened in the appended claim.

What I claim is:

A spray nozzle comprising a housing having therein a whirl chamber for liquid, an inlet for the liquid into said chamber extending tangentially to the wall of the whirl chamber, and a spray head having an axial generally conical dischargeorice with its largest diameter in proximity to the discharge end, said discharge end of the spray head having an inwardly directed annular lip extending axially beyond the largest diameter end of the conical orice, the inner wall ofy the lip being tapered in opposed relation to the taper of the conical discharge orifice.

SAMUEL LYMAN.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 26,088 Button et a1. Nov. 15, 1859 1,078,433 Hadden et al Nov. 11, 1,913 1,504,000 `Simmons Aug. 5, 1924 1,625,042 McAldle Apr. 19, 1927 1,714,850 DeWhalley May 28, 1929 1,826,776 Gunther Oct. 13, 1931 1,931,792 Giordano Oct. 24, 1933 `1,961,498 V/ahlin June 5, 1934 1,964,255 YFaast June 26, 1934 2,247,897 `Wahlin July 1, 1941 FOREIGN PATENTS Number Country Date 24,870 Great Britain June 27, 1907

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