US1744772A - Refrigerating apparatus - Google Patents

Description

Jan. 28, 1930. J. G. KING REFRIGERATING APPARATUS Original Filed Nv. 24, 1925 2 sheds-sheet IIIIIIIIIIIIIIIIIIIIIIIIIINIIWMNMWIIIIIIHI Jan. 2s, 1930.`

J. G. KING REFRIGERATING 'APPARATUS Orlgnal Filed Nov. 24, 1925 2 Sheets-Sheet 2 v w Grundy/0 Patented Jan. 1930 i UNITED STATES PATENT OFFICE I G. KING, Ol' DAYTON, OHIO, ASSIGNOR, BY MESNE ASSIGNMENTS, TO IRIGIZD- AIRE CORPORATION, A CORPORATION OF IDEI'JAWASRJILy REFRIGERATING APPARATUS Application led November 24, 1925, Serial No. 71,170. Renewed September 22, 1927.

This invention relates to refrigerating apparatus and particularly to cooling units or evaporators.

One ofthe objects of the present invention 5 is to improve the general construction of the evaporator 'and to facilitate the manufacture thereof. A

More speccally it is one of the objects of the invention to provide a form of evaporator 1o which may be constructed substantially entirely of sheet metal and thus reduce the cost of manufacture.

One manner of carrying out the above object is to wrap a sheet of material to provide a hollow chamber. for receiving articles to be frozen or congealed and spacing the turns of the material to provide a chamber for refrigerant.

. Other and further objects of the present invention will be apparent from the following description, reference being had to the accompanying drawings, wherein a preferred form of embodiment of the present invention is clearly shown.

In the drawings:

Fig. 1 is a cross sectional view of the improved evaporator showing containers for water or the like in elevation.

Fig. 2 is a front view in elevation.

Fig. 3 is an elevational view of a connector ring, and

Fig. i is a sectional view taken on line 4 4 of Fig. 2 and showing ice trays in side elevation. e

Referring to the drawings, 20 is a header for receiving refrigerant. The header 20 is provided with an end plate 21 to which is connected a coupling 22 which is adapted to be connected with a condenser of a refri rating a certain amount of liquid rerigerantis nor-A mally maintained within the header 20. Gasiied refrigerant passes from the header 20 i through a tube 26 which is connected through the plate 21 with couphn'g 23.

apparatus, and a coupling 23 connectible with Adjacent the header 20, and connected to it,

preferably by a number of conduits or connections 27 in parallel circuit relation, is a refrigerant chamber 28 forming a chilling compartment or enclosure for ice making receptacles 33. This chamber is preferably formed vof thin sheet metal in the following manner. A sheet 29 is attached to the conduits 27 at a point roughly one fourth of its length from one end, and is then formed as by winding or rolling into a spiral having slightly more than two convolutlons. Each end edge of the sheet is sealed to the side of the sheet approximately at its center so as to space the convolutions from each other and close the space thus formed. This may be accomplished by sealing each end to a spacing bar 30 and sealing the spacing bar to the sheet near its middle. This arrangement provides a pair of hollow walls extending in opposite directions from the connections 27 and forming a substantially annular refrigerant chamber. The chamber may be closed at each end in any suitable manner, as by a spiral member 31 fitted into the spiral space between the convolutions and sealed to the sheet 29.

As shown, the chamber 28 is in close-coupled relationship with the header 20, being connected therewith by the short duct connections or couplings 27 at a pluralityof points along the length thereof. Chamber 28 is located below the header 20 and being in free communication therewith it is normally filled with liquid refrigerant and as a result of this the wall forming the chilling compartment is substantially at all times exposedv to the temperature of the liquid refrigerant,

which, becausey of the liquid'to metaLcontacttends to establish substantially uniformly cold temperatures for-the walls of the chilling compartment.

Brackets 32 are suitably secured'to the inner turn of sheet metal 29 and support containers 33 for water to be frozen vor for articles to be congealed. v

The evaporator as herein described is simple in construction and can be manufactured.' Y at a relatively low cost. -Itprovides a rela- Y tively cold portion for receiving ice 'trays or the like and also provides a large outer surface for cooling air.

While the for'm of embodiment of the present invention as herein disclosed, constitutes a preferred form, it is to be understood that other forms might be adopted all coming within the scope of the claims which follow.

What is claimed is as follows:

1. An evaporator for refrigerating apparatus comprising a single sheet of metal wound into a spiral coil, the end edges of the sheet being joined to the sides of the sheet to form a substantially annular chamber, the ends of the chamber being closed.

2. An evaporator for refrigerating apparatus comprising a single sheet of metal wound into a spiral coil, and a pair of spacing means each secured to one end edge of the sheet and to the side of the sheet to form a substantially annular chamber, the ends of the chamber being closed.

3. An eva orator for refrigerating apparatus comprising a single sheet of metal wound into a spiral coil, a pair of spacing means each secured to one end edge of the sheet and to the side of the sheet to form a substantially annular chamber and a pair of spiral members each interposed between adjacent ends of the spacing means and joined to the side edges of the sheet to close the chamber.

4. An evaporatorfor refrigerating apparatus comprising a single sheet of metal wound into a spiral coil, and spiral spacing members interposed between the convolutions of the sheet, said spacing members being fastened to the sheet to enclose a substantially annular chamber.

5. Refrigerating apparatus comprising, in combination, a cooling device comprising a header forming a reservoir for liquid refrigerant, one or more hollow7 sheet metal walls connected to the header, the walls being arranged to form a plurality of refrigerant circulating pathsin parallel circuit relation, port-means for admitting liquid refrigerant to said header, a second port-means for withdrawing refrigerant vapor therefrom, and means for maintaining in the cooling unit a level of liquid refrigerant at all times suicient to maintain liquid refrigerant in contact with said sheet metal walls up tothe height of the header whereby to establish substantially uniform wall temperatures opposite the liquid refrigerant.

6. Refrigerating apparatus comprising, in combination, a cooling device comprising a header forming a reservoir for liquid refrigerant, one or more hollow sheet metal walls connected to the header, the walls being arranged to form a plurality of refrigerant circulating paths in parallel circuit relation, said wall or walls forming an enclosure for an ice-making receptacle positioned below the header, port-means for admitting liquid refrigerant to said header, a second portmeans for withdrawing refrigerant vapor therefrom, and means for maintaining in the cooling unit a quantity of refrigerant suicient to keep substantially all of said wall or walls facing said enclosure under liquid and substantially uniformly exposed to the liquid temperature thereof.

7. Refrigerant liquid storage, control and evaporating means for a refrigerating apparatus, comprising in combination a fabricated unitary structure comprising a header providing a chamber for liquid and gaseous refrigerant, and a liquid evaporating chamber positioned below the header and comprising a pair of spaced shells, one of said shells being secured in close coupled relationship to the header and the space between the shells being closed at its ends and in communication with the liquid in the header, port-means for admitting liquid refrigerant to said header and for withdrawing refrigerant vapor therefrom, and means for maintaining in the evaporating means a level of liquid refrigerant sufficient to at all times maintaining said evaporating chamber! submerged in liquid refrigerant whereby to'expose the Walls thereof substantially uniformly to the temperature of the liquid refrigerant.

8. Refrigerant liquid storage, control and evaporating means for a refrigerating apparatus comprising in combination, a fabricated unitary structure comprising a header providing a chamber for liquid and gaseous refrigerant, and a liquid evaporating chamber positioned below the header and comprisa pair of shells spaced apart to form a in sustantially annular passage for liquid refrigerant and a cooling chamber within the shells, one of the shells being secured in closecoupled relationship to the header and said passage being in open communication with the li uid in the header, the Walls of said cooling c amber submerged in liquid refrigerant and substantially uniformly exposed to the liquid temperature thereof.

9. A refrigerating system, refrigerant liquid storage, control and evaporating means comprising, in combination, a fabricated unitary structure having a header providing a. chamber for liquid and gaseous refrigerant, and a liquid evaporating chamber connected with the header and comprising sheet metal walls rolled to provide inner and outer walls spaced to provide therebetween a liquid evaporating chamber, said inner and outer sheet metal walls being joined at their edges and so constructed and arranged so to form a refrigerating compartment extending through the structure and open at both ends, port means for admitting liquid refrigerant to the interior of said structure and for withdrawing vaporized refrigerant therefrom, and means for so controlling the level of liquid refrigerant as to maintain substantially the entire said inner sheet metal wall in contact with refrigerant and exposed to liquid refrigerant temperature.

l0. A refrigerating system, refrigerant liquid storage, control and evaporating means, comprising, in combination, a fabricated unitary structure having a header providing a chamber for liquid and gaseous refrigerant and evaporating means positioned below sai header and comprising sheet metal rolled to provide spaced-apart inner and outer walls joined together at both edges whereb to pro- Vide therebetween a shallow refyiigerant chamber forming an enclosure for a chilling compartment with said inner wall facing said compartment, means establishing communication between said header and the chamber of said evaporating means at a plurality of points along the length of the latter, and means for at all times maintainin a level of liquid refrigerant sufcient to su stantially submerge said inner wall facing the said chilling compartment..

11. A refrigerating system, refrigerant liquid storage, control and evaporating means, comprising, in combination, a fabricated unitary structure havin a horizontal header providing a chamber or liquid and gaseous refrigerant, and evaporating means positioned below and close to said header and 3G comprising sheet metal rolled to provide spaced-apart inner and outer walls joined together at both edges whereby to provide therebetween a shallow refrigerant chamber bounding with its inner wall a chilling compartment having its longitudinal axis horizontally disposed and parallel with the axis of said header, means establishing communication between the chambers of said header and said evaporating means along the length. thereof, port means for admitting refrigerant to and for withdrawing refrigerant from said chambers, and means for maintaining a level of liquid refrigerant in said chambers at all times sufficient to substantially submerge said inner walls of the chillin compartment whereby the wall of said c ing compartment is continuously maintained at liquid refrigerant temperatures.

In testimony whereof I hereto aix my sigso mm" Jnssn e KING

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