US2013134A - Evaporator - Google Patents

Description

Sept. 3, 1935. w. D. COLLINS EVAPORATOR Filed Aug. 10, 1932 2 Sheets-Sheet 1 '25 1 l 0 n w INVENTOR.

W. D. COLU NS w. D. COLLINS 2,013,134

EVAPORAT OR Sept. 3, 1935.

Filed Aug. 10, 1932 2 Sheets-Sheet 2 Ill . 1/7 A I I I g; I LA/' 11/1 J 2/1 1 1 W INVENTOR. W. D. COLL! NS a a I w ATTORNE Patented Sept... 3, 135

EVAPORATQR William ill. Collins, Evansville,

Servel, line, New "llorlt, N. in,

Delaware llnd., assignor to a corporation of Application August 10, 1932, Serial No. 628,140 to (Claims. (Cl. 62-126) This invention relates to cooling elements or evaporators for refrigerating apparatus.

A cooling element or evaporator, particularly in household refrigerators, must provide for freezing water to form ice cubes and also cool air in the storage compartment to a temperature suitable for the preservation of comestibles.

It is an object of this invention to provide an evaporator or cooling element providing full su face contact with the bottom of ice cube trays for direct conduction of heat from the water to be frozen and an extensive heat transfer surface for cooling air in the refrigerator, which coolinelernent is inexpensive, simple in construction, and very durable.

Other objects and advantages will be apparent from the following description taken in connection with the accompanying drawings, where- Fig. 1 is a front elevation illustrating one appli cation of the invention.

Fig. 2, a side elevation;

Fig. 3, a section on the line 3-3 of Fig. 2, and

Fig. 4. a section on the line t-i of Fig. 2.

An evaporator embodying the present invention comprises a header ill, and a seriestube M, which extends downwardly from the header and is wound about in a plurality of vertically spaced U-shaped loops it, with connecting plates it? across opposed sides of the loops to form shelves for ice trays and the like. The shelves or plates l3 are cast about the sides of the opposed loops toeffect satisfactory heat transfer, the metal employed being of high thermal conductivity. While there are shown three shelves it, it will be understood that the device may consist of any desired number. The other end 94 of the tube it is connected to a source of supply of liquid refrigerant as for example by means of a capillary tube or other liquid control device, not shown.

Refrigerant admitted in the lower end M of the tube It will pass through the respective horizontally spaced loops ii in series and into the header lit at the top of the evaporator from whence the gasified refrigerant is withdrawn through a suction line l5.

The shelves l3 are secured in fixed spaced relation by means of parallel vertical side fins l6,

connected at their upper extremities by parallel horizontal cross fins H, the shelves and side and upper cross fins being cast integrally and being provided with supporting studs l8 and l9, by means of which the device may be secured in place.

The header ill is formed separately from the main body of the device and in order to secure it in its proper associated relation the cross fins H are provided with a central, longitudinal trough or cradle 29 in which the header to is adapted to fit snugly, the trough being of substantially semi-cylindrical conformation. In

order to clamp the header it in the trough 2d,

yoke clamps are provided which extend across the header at opposite ends and are secured to ears 22 on the trough 2!) by means of bolts 23.

The above construction whereby two groups of plates are secured in edge to edge relation simplifies the manufacture of the evaporator materially and provides means for a rapid transfer of heat from trays or the like placed upon the shelves l3 as well as air circulating over the evaporator. With this type of tended to use a front plate and one or more side plates not shown, and to this end a number of brackets 26 are employed at the front of the device which cooperate with brackets 25 attached to the header for supporting a front plate. Bosses 26 are provided at the sides of the shelves it to which a face plate not shown may be secured by screws orother fastening means also not shown.

It will be apparent to those skilled in the art that various other changes may be made in "the construction and arrangement without departing from the spirit of the invention, and therefore the invention is not limited to that which is described in the specification and shown in the drawings,

but only as indicated in the appended claims.

What is claimed is:

1. An evaporator comprising a plurality of superposed shelf loops having opposed horizontal portions, a casting having said loops at least partially contained therein, integral article supporting webs extending across and connecting said casting adjacent said horizontal loop portions, and integral continuous fins on its side and top, a header of separate construction, and a relatively large cradle carried by the body for intimate contact with the header to provide good thermal contact therewith.

2. A cooling unit comprising a cast metal body having continuous fins extending on its side and top and with integral shelves, said cast metal body having portions of a series tube extending through and embedded in its wall at the side edges of the shelves, and an'independent header secured in good thermal contact with said body and having a connection with said tube.

3. A cooling unit comprising a. body cast with evaporator it is in upright heat radiating fins at each side connected by spaced shelf forming plates, the edges of the plates being disposed at an angle to the shelves, a header of independent construction, and a tube extending through said fins along each side edge of each shelf forming plate and connected to said header.

4. An evaporator comprising a cast metal body, means for securing a header in good thermal relation longitudinally of said body, said cast metal body having outwardly and downwardly extending fins for effecting heat transfer, a tube connected to the header and extending horizontally through the cast metal body and providing a plurality of substantially parallel side portions, said body also having integral webs connecting said side portions to form shelves.

5. An evaporator comprising a cast metal body having side portions formed of spaced upright fins for eifecting heat transfer and shelves forming the only connection between said side portions and having refrigerant passages extending along the edge of each shelf.

6. An evaporator comprising a body formed of cast metal and including a series of shelves, a series of fins located in edge to edge relation to said shelves and securing the shelves in spaced relation and providing air passages between the fins and shelves and a tube at the outer edge of each shelf, said tubes being connected in series.

7. A device of the class described comprising groups 01 plates secured in edge to edge relation to provide an open-work construction, one group forming shelves and another group forming heat absorbing fins, some of the plates of the group forming the shelves being provided with marginal refrigerant channels.

8. A cooling unit comprising a body cast with upright heat radiating fins at each side connected by spaced shelf forming plates, the edges of the plates and shelves being disposed at an angle of substantially 90, a header of independent construction, and a tube extending through said fins along each side edge of each shelf forming plate and connected to said header.

9. A cast metal cooling unit for a refrigerating system comprising a plurality of shelves disposed one above the other, upright spaced fins connected to said shelves in edge to edge relation and providing an open-work construction permitting substantially free circulation of air between said fins through said cooling unit and at the same time exposing a relatively large heat transfer surface to circulating air.

10. A cooling unit for a refrigerating system comprising a plurality of shelves disposed one above the other, upright spaced fins connected to said shelves in edge to edge relation and providing an open-work construction permitting substantially free circulation of air between said fins through said cooling unit and at the same time exposing a relatively large heat transfer surface to circulating air, and channels disposed in substantially the plane of one or more of said shelves.

WILLIAM D. COLLINS.

one or more refrigerant

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