US1924525A - Method of cooling liquids - Google Patents

Description

Aug. 29, 1933. H. w; TAYLOR ET AL 1,924,525

METHOD OF V COOLING LIQUIDS original' Filedqune 3o, 1927 Hnssr wrana/e .MM5 r-imrh' vses f 55 coil of double pipe of any desired length, the coil.

Patented Aug. 29, 1933 "UNITED `STATES PAT-:Nr

OFFICE 1,924,525 METHOD or COOLING LrQUms Halsey'W. Taylor, Warren, and James T. Smith,`

Cleveland, Ohio; said Smith assignor to The -Halsey W. Taylor CompanyWarren, Ohio, a

corporation of Ohio Original application June 30, 1927, Serial No.

Divided and this application October 1,1928. serial No. 309,592

1 claim. `(ci. 62-116) On Oct. 30th, 1928 as Patent N0. 1,689,461 `0fv which this application is a division.

Thus, in the accompanying drawing, Fig. 1

is a sectional View of a drinking fountain and cooling apparatus with which the present method may be practiced, and Fig. 2 is a sectional view of a cooling pipe or tube used in thatparobjects of the present method is to cool thewater lin graduated degree to the desired low temperature by causing it to flow in a relatively long attenuated stream in heat exchangerelation with a relatively long attenuated stream of refrigerant, preferably by counterow. A further object is to effect water cooling in the way herein described whereby heavy irregular demands may be properly taken care of inexpensively by a small and compact refrigerating apparatus adapted to operate automatically. Another object is to produce water cooling as herevinafter set forth without endangering the apparatus itself or the persons drinking water dispensed by the apparatus should freezing of the water occur due to accidental malfunction of the automatic refrigerating apparatus.

As shown, the cooling appliance A is installed in a drinking fountain and water dispensing' cabinet B, which cabinet may be of any desired construction Or design. Suitable refrigerating apcabinet, the showing being in part diagrammatic. It should be understood, however, that the refrigerating appliance or operating unit C may be located outside of the cabinet, more or less remotely therefrom, as is the practice in some may be either air or water-cooled. In brief, appliance C may be of any known type or kind adapted to supply the water cooling appliance or coil A with a liquid or gaseousrefrigerant, and preferably I use mechanism whereby refrigerating operations are controlledautomati cally, either by the pressure or temperature produced in the system.l l

The water cooling appliance A consists of a pliances Q, are also contained in the base of this installations, and that the compressor thereof -as a whole being of 4a diameter adapted to be confined Within-a compartment 2 in cabinet B beneath a top 3 carrying an Overflow bowl 4 for a fountain head or nozzle 5. A valve 6 may be used to control the flow of water to nozzle 5, or this valve may be omitted when a continuous flow is desired. v In the present instance, a faucet 7 is also connected to a discharge fitting 8 having pipe connection with the water discharge head,.9 of cooling coil A, and which coil is composed of two sleeved pipes 10 and 11, respective-v ly. The inner pipe 10 is of somewhat smaller diameter externally than the internal diameter of outer pipe 11 to provide a relatively narrow passage 12 through which a thin film or body of Water or other liquid to be cooled may flow in constant contact with inner pipe 10. The refrigerant is caused to flow through the 4inner pipe in a direction counter to the iiow of water through passage 12, and inthe present instance the refrigerant intake end of. pipe 10 passes through head`9 and connects with an expansion valve 14. A small pipe 1-5 conducts a, liquid refrigerant from a condensing unit 16 to expansion valve 14, and the evaporating refrigerant passes from the expansion valve to inner pipe 10 and thence to the lower or outlet end 17 of this pipe Where connected to the compressor 18 for return to the condensing unit 16. The water to be cooled is'conducted by a pipe 19 to a hollow head 20 on the outlet end of vinner pipe 10 and thence through the entrance to outer pipe 11 where connected to said head, the water flowing upwardly in a thin body through an annular space or passage 12 between the inner and outer pipes 10 and 11, respectively.

The life and operativeness of such a double coil is largely dependent upon the size of the water circulating spaceor passage 12. By making thi's space very narrow the water may be caused to flow in a thin film or layer over pipe 10 containing the/refrigerant, so that the heat may be readily and quickly removed. The velocity of flow of the water is also increased, which is useful in `breaking up high resistance at the surface of inner pipe 11 where the actual heat transfer takes place. Moreover, a narrow water passage or series of small passages will not perice body formed in the passage will not expand 'outer pipe 12 beyond the pipe itself. In

its own elastic limit, that is, beyond the elastic limit of the metal wall of this way rupture of the outer pipe is prevented in case the thin sheet of water should freeze solidly due to accidental malfunction of the automatic refrigerating appliances C.

Outer pipe 11 is preferably ilud or corrugated to provide a seriesof spacing and contacting ribs 21, whereby the two pipes are spaced uniformly in respect to each other. or corrugations extend longitudinally of pipe 11 but may be spirally formed therein. and in 'addition to serving as spacing elements they also serve other useful purposes, that is, they provide yielding or flexible places in the circular wall to permit the pipe to expand without rupture should ice form Theseutes` and expand within passage lil,

and they also extend the heat exchange area of the inner pipe 'at numerous radial places culate with advantageous cooling results.

What we claim is:

A method of vcooling a liquid under draft, consisting in forming a tubular stream of liquid and subdividing said tubular stream .into separate individual streams andco-incidently passing a refrigerating fluid centrally through said tubular stream and in establishing heat exchange relations with each stream intermediate the respective streams of liquid.

HALSEY W. TAYLOR. JAMES T. SMITH.

Images