US1782628A - Refrigerating apparatus - Google Patents

Description

Nov. 25, 193.0, 1 o. c. OLSEN 1,782,628 REFRIGERATING APPARATUS V Filed zso, 1927 s Sheets- Sheet 1 I fittomu,

NOV. 25," 1930. r v c EN v 1,782,628 REFRIGERATING APPARATUS Filed Aug. 30, 1927 s Shuts-Sheet 2 Nov. 25, 1930. o. c. OLSEN REFRIGERATING APPARATUS Filed Aug. 30, 1927 s shaw -sheet a attouuqs Patented Nov. 25,1930

" PATEN 3 OFFICE our. 6. oLsmr, or DAYTON, OHIO, .AssIe voR or rwo-rnmns 'ro rnnynounim coir- IPANY, or WARREN, OHIO,

n CORPORATION or 01110 nnrnxennarme APPARATUS Application fl ed August so, 1927. Serial1l'o.216,392,

' This invention relates to improvements in refrigerating systems, and particularly to that part of a system which is designed to whereby it becomes accessible Whenever the .freezing compartment is made accessible,

be placed within the refrigerator and which Is referred to hereinafteras the refrigerating unit.

One of the objects of the invention is the provision of a refri erating unit having a control mechanism W ich shall be readily accessible. n v

'Another' object of the inventionis the location of the control mechanism upon a removsaid end the front end of the freezing compartment,

as by the opening of a door of the refrigerator.

/ anism, 7 after.

eraliy designated 16. From the latter liquid refr gerant under low pressure flows through a coil of pipe 17, constituting the evaporating c'oil within which are arranged the'freezing trays 18, while the gas given off by evaporation fiows from the opposite end of the coil 17 into the flOflUChtlIllbBI of the control mechas will more clearly 'appear herein- The upper portions of the various loops of the coil 17 are clamped in position by a rod or bar 19 inthe upper edge or edges of which are formed notches 20'to receive, the

pipe loops, together with a rod or bar 21 having curved extremities, the two bars 19 and 21 being secured together and clamped upon the loops of the coil 17 by means ofmachine screws 22: The bar 21 is of some little width Other objects, and objects relating to de- 'and supports upon its upper surface legs 23,

tails of construction, will appear as I proceed with the description of that embodiment of the invention which, for the purposes of the present application, I have illustrated in the accompanying drawings, in which: i v l V .Figure 1-is a front elevational View of a refrigerating unit embodying my control mechanism. a

Figure 2 is a side elevational view of the same. a e a 5 Figure 3 is a cross sectional view on a larger scale of the cover plate of the float chamber and certain associated parts, the

view being taken substantially on the line 3-3 'of Figure 1.

Figure 41, is a detail vertical sectional view a of one of the connectors for the system, and

Figure 5 is a diagrammatic illustrationof a refrigerating systemembodying my invention. a

Similar'reference characters refer to like" parts throughout the views;

n it and to deliver it through pipe 12 into a con- Referring first to Figure 5 of the drawings,

the refrigerating system there shownembodies a compressor pump 10 ada ted-'to receive expanded gas through pipe 1 ,,to compress densin'g coil 13. .The lower end of condensing coil 13 empties into a liquid receiver 14, from p which apipe 15c'ontaining a'hand valve 15" leads back to.;..t he control mechanism, genscrews 24.

which are secured to the bar by fiat headed plate 28 is provide therefor and removably secured thereto by stud bolts29 whichpass into threaded-holes i-n bosses 30 on the casing. The closure plate 28 carries all of the control mechanism. a

Somewhat below its center the cover plate 28 is provided withsa threaded'opening 31 for the reception of a connector plug 32 at the upper end of the pipe 15' leading from the condenser'coil 13. The plug 32 is provided centrally with a constricted passage '33 controlled by a needle valve 1 34: also mounted'in the plug and urged away from its seat in the passage 33 by a coil sprifig 35, bearing on the head of the valve which is of a size to fit a flanged ca '34'" that is slidv able in a guide hole 36 of t 'e' plate 28. The guide hole 36 extends through the plate into a cavity 37 formed in the rear side thereof. The clearance between-the head of the valve 34 andthe-wall of the guide opening-36 af-; fords some connection between, the cavity 37 and the valve, but I prefer to'provide-"a m brackets the bell crank 54 is formed like a bail and is further unobstructed passage 38. The head .of the valve is pressed by-the spring 35 against a diaphragm 39, which forms the rear wall of the cavity 37, being clamped at its periphery against an annular shoulder 40 by a rib 42 on a circular plate 41 of considerably smaller diameter than the plate 28 and secured thereto by suitable means, as by a screws 43. The diaphragm 39 is movable outwardly by aRstemj44, provided with a large head 45,

and at its 'rear end with a bifurcation 46 which straddles a pin 47 mounted in a bifurcated lever 48 which is xiivoted at 49 in brackets50 on the plate 41. he up r end of the lever 48 is pivotally connects at 51 with a short link 52 which is in turn ivoted at 53 to the short arm of a bell crank ever 54 mounted at 55 on a pivot carried by a second pair of 56 on the'plate 41. The rear end of attached to a metal float 57.

Leading from the cavity 37 there is a passage 58 extending into a socket59 in the forward side of the plate 28. The socket 59registers with a short transverse passage 60 in a special connector member'61 which I find it desirable to employ, although a simpler connector would serve the purpose.

The connector 61 has a pair of integral at taching lugs 62 through which securing studs 63 extend into threaded openings 64. The passage 60 connectswith a cavity'65 and thence an axial passage :66 with the intake end of the coil of p e17. The up er end of the passage 66 is adapted tobe c osed by a valve piece 67, onthe end ofa valve stem 68 which is threaded for upand down adjust? ment in the connector member, .the smooth 0 portion of the stem running through a packing 69 which is held in place by a gland 70. The upper end of the stem 68 1s squared, as shown at 71, for the receptionof an operatmg wrench. When,the valve piece 67 is threaded upwardly to the limit of its move- "Opera tio n e0 When the apparatusis assembled and it is desired to introduce refrigerant, the plug 76 in the special connector 61 is removed and a connection made between the refrigerant supply apparatus and the threaded socket 75'. Charging of the apparatus then frigerant in the proceeds, and when it is completed the valve stem 68 is threaded upwardly until the passage 72 is closedby the valve piece 67, when the connection from the refrigerant supply may be broken and the plug 76 replace Now with the valve piece 67 in its upper position free flow of refrigerant is permitted from passa e 60 to passage 66, and thence to coil 17. en in the course of the operation -of the apparatus it becomes necessary to replenish the sup ly of refrigerant, the .same procedure maybe followed, except that the valve 67 must be caused to close the passage 72 before the plug 76 is removed.

- Gaseous refrigerant is condensed in the coil 13, due to ressure exerted by the compressor 10, an flows as liquid under heavy pressure up to the constructed passage 33 in plug 32. Assumin that the valve 34 is not tightly seated at the time, liquid moves in small quantities past the valve into the cavity 37' and through passage 58 and socket 59 into passage 60 ofthe connector 61 and thence through cavity 65 and passage 66 into coil 17.. After passing the expansion valve 34 the duced. ile circulating throu h the coil 17, more or less of "the liquid re igerant -is converted into a and this gas flows. into the float chamber in 'casing 25-throu h connector 27, after which f it is drawn 0 'through connector' 78 and pipe 11 back to the compressor 10. When the level .in the float chamberis suflicientIy -high,'the float 57 tilts the bell crank 54 on its pivot 55, actuating link 52 and lever 48 to causepin 47 to move the stem to the left, as viewed in Fi re 2, and to move'valve 34 to closed fpositionthrough the intermediac of diaph agm. 39; When the liquid leve descends,v us to evaporation, the'stem 44 is retracted somewhat and the sprin 35 then acts to move the valve 34 to the right' slightly and the flow of liquid into coil 17 is resumed and continued until the float 57 again rises sufiiciently to close the expansion ressure of the liquid is much re-.

s, thus absorbing heat;

valve 34. The coil 17 is, therefore, flooded at all times.

The refrigerating unit of this apparatus is so designed that all of the working parts are located upon the .plate 28, and this is positioned in the front of the unit so that repairs or replacements may be made with a minimum oflabor and expense. The expansion valve, which is perhaps theelement requiring the greatest amount of servicing ma .be removed, inspected and repaired wit out the removal 0 the plate 28. When this is to be done the hand valve 15' is closed and the stem 68 is screwed down until the valve piece 67 closes the passage .66. The

pipe 15 may thenbe disconnected from plug 32 and the latter unscrewed and removed a with the loss of but a small part of the re-. system. v

7 mg, sald closure having an opening therei the casing sai casing, an expansion valve or controlling the intake end of said evaporator mount- Having thus described myinvention what I claim as new is: v

1. In a refrigerating system, an evapora tor, control mechanism comprising a casing open atone end, said casing havmg a connection with the delivery end only of said eva orator, a closure for the 0 en end of ed outside of said casing, afloat in said casthrough, a diaphragm sealing said opening, and operative connections between said float and diaphragm within the casing and between said dlaphragm and valve outside of for controlling the operation. of said valve.

2. In a refrigerating system, an evaporator, afreezing compartment within said evaporator accessible from the front end thereof, controlling mechanism mounted outside of said evaporator near the front end thereof and directly mechanism 'compris ng-a casing open at its front end, said casing havin a connection with the delivery end only 0 said evaporator, a closure for said casing, an expansion valve adapted to admit refrigerant to the intake end of said evaporator, a float in said casing, said closure having an openin therethrough, a' diaphragm sealing sai opening, and operative connections between said float and diaphra within the casing and between said diap ragm and valve outside of the casing for controlling the operation of said valve. I

3. In a refrigerating system, embodying means for circulating refri erant, acasing comprising a float chamber or the reception of refrigerant, a float in .said chamber, a closure for one end of said chamber, a diaphragm in said closure, an expansion valve mounted upon said closure outside of said diaphra and operative connections mounte valve from said float through the intermediacy of said dia hragm.

liereof, I hereunto afiix my In testimony w signature.

. OLAF C. OLSEN.

adjacent thereto, said on said closure for actuating said

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