US1779135A - Evaporator - Google Patents

Description

Oct. 21, 1930. LENMNG 1,779,135

EVAPORATOR File d June 1, 1929 L L, INVENTOR BY J lj- TORNEY Patented @ct. 21, 1930 UNITED STATES- PATENT OFFICE ALVAR LENNING, OF JACKSON BEIGH'IS, NEW YORK, .ASSIGNOR TO ELECTROL'UX SEBVEL CORPORATION, OF NEW YORK, N. Y., A CORPORATION OF DELAWARE EVAPOBATOR Application med June 1, 1929. Serial 110. 367,658.

My invention relates to refrigerators and more particularly to refrigerator. cabinetsand that portion of automatic refrigerating apparatus which is inside the food space of such cabinets... Such part is generally called the evaporator because it comprises that portion of the apparatus in which evaporation takes place to remove heat from the surroundings.

The object of my invention is to provide an evaporator which combines efficiency of heat transfer with adaptability to the food space for obtaining a maximum of effective food space and which is neat in appearance.

The nature of the invention will become apparent from consideration of the following description taken in connection with the accompanying drawing showing a preferred form of the invention, which drawing is a part of this specification.

On the accompanying drawing:

Fig. 1 is a sectional View of a refrigerator cabinet according to invention, looking downwardly and taken on line 1-1 of Fig. 2; and

Fig. 2 is an elevational sectional view taken on the line 22 of Fig. 1.

The refrigerator cabinet 10 comprises a food space 11 and an apparatus compartment 12. The food space is bounded by walls 13 and is surrounded by insulation 14. The apparatus compartment. contains parts of automatic refrigerating apparatus which may be of the type disclosed in Patent N 0. 1,609,334 granted December 7, 1926, to Von Platen and Munters.

The evaporator, designated generally by reference character 15 comprises a shell 16 which is preferably cylindrical in form and includes a number of discs 17 which are apertured with holes having raised rims for holding pools of refrigerant. The discs are arranged as in the aforesaid Patent No. 1,609,334 to give tortuous fiow of fluids. The shell is preferably made of steel. It is situatedto one side of the food space as shown in Fig. 1.

It may be supplied with a refrigerant and an inert gas into which the refrigerant diffuses, the gas mixture formed being withdrawn to the customary absorber.

The casting has a ,recess 20 curved to fit the I outer contour of shell 16 and arms 21 for securing the casting member to shell 16. The a heat transmitting means also comprises a back casting member 22 comprising a platelike web 23 which is of substantial hei ht as shown in Fig. 2 and which extends su%stantially across the entire food space. Member 22 extends to the right of shell 16 as shown and is curved to fit shell 16 and is provided with four or more bolt holes through which or into which bolts 24 are passed or screwed in order to pull member 21 toward member 22 and to clamp these members around shell 16. Web 23 extends substantially at right angles to the direction of extension of, member 18. On the forward side of web 23 is a series of vertical fins 25 which extend the full height of the web. Web 23 is supported at its outer end by one or more brackets 26. The shell 16 is supported principally by the conduits 27 and 28 which supply fluid thereto and conduct fiuid therefrom.

A series of fins 29 extend vertically on one side of the freezing compartment 19; the side nearer to web 23. A plate 30 extends in front of web 23 and to the left-hand side (as shown) of member 18, that is, to the food side of fins 29. Projections 31 are provided on the casting members to permit fastening plate 30 in place. A plate 32 is secured over the front of member 18 with an opening to give access to the freezing chamber. Plates 30 and 32 are preferably porcelained on the outside. Being spaced from web 23 and member 18, air passages 34 are provided for conducting air downwardly past the evaporator into the part of the food space below the evaporator. A cover may be placed over the front of the compartment 19, in which case the cover together with the plates 32 and 30 completely cover casting members from view and present a neat appearance.

My improved evaporator gives heat transmission to all parts of the food space and serves to evenly.,distribute the cold produced. At the same time the arrangement provides an eflicient circulation of air past the evaporator surface. Also, the evaporator is compact and provides a maximum of food space for the amount of extended surface.

Reference character 36 designates a shelf supported by the side wall 13 and by. hooks formed on members 31 midway of the side of the freezing chamber. For defrosting purposes a pan 37 is provided under web 23 which drains into a larger drain pan 38 under th shell and freezing chamber.

While I have shown and described one form of the invention it will be understood that the invention is not limited to the form shown and described, but is to be considered in the light of the appended claims taken in connection with the state of the prior art.

WVhat I claim is:

1. In combination-with a refrigerator cabinet having walls defining a food space, an evaporatoncomprising a shell in said food space, a front casting member comprising means for holding material to be frozen, a back casting member comprising a web and extending substantially across the food space and means for clamping the casting members to said shell.

2. In combination with a refrigerator cabinet having walls defining a food space, an evaporator comprising a vertically disposed cylindrical shell in said food space and to one side thereof, apertured discs within said shell for holding pools of refrigerant, a front casting member com rising means for holding material to be rozen, a back casting member comprising a web and extending substantially across the food space and means ffirnclamping the casting members to said s e 3. In combination with a refrigerator cabinet' having walls defining a food space, an evaporator comprising a shell in said food space to one side thereof, a front casting member comprising means for holding material to be frozen, vertically extending fins on said casting member, a back casting member comprising a narrow web of substantial ver tical extent and extending substantially, across the food space, vertically extending fins on said web and means for clamping the casting members to said shell.

4. In combination with a refrigerator cabinet having Walls defining a food space an I evaporator comprising a shell in said ood space and to one side thereof, a front casting member comprising means for holding ice trays, a back casting member comprising a web and extending substantially across the Mamas 7 food space, means for clamping the casting membersto said shell and a plate extending in front of said web and to the side of said front casting member adjacent thereto.

5. In combination with a refrigerator cabinet having Walls defining a food space, an evaporator comprising a shell in saidfood space and to one side thereof, a front casting member comprising means for holding material to be frozen extending forwardly of said shell and to one side of said food space, a back casting member comprising a Web and extending substantially across the food space, fins on the forward side of said web, fins on the side of the front casting member adj acent said-web, means for clamping castings to said'shell and a plate extending in front of the fins on the web and on the front casting member.

6. An evaporator comprising a shell, a casting member comprising means for holding material to be frozen extending outwardly from said shell, a second casting member comprising a plate-like web extending outwardly from said shell at substantially right angles to the extent of the first mentioned casting member from the shell and means for clamping said'casting members to said shell.

In testimony whereof I have afiixed my signature.

ALVAR LENNING.

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