US1995167A - Evaporator - Google Patents

Description

March 19, 1935. s. s. BATTLES EVAPORATOR Filed Jan. 14, 1935 -37'EWAET 5. BATTL E5.

Patented Mar. 19, 1935 I 1,995,167 EVAPORATOR Stewart S. Battles, Chicago, Ill., assignor to Ingersoll Steel and Disc 00., Chicago, Ill.,- a corporation of Illinois Application January 14, 1933, Serial No. 651,715

13 Claims. (01. 62-126) UNITED STATES PATENT; OFFICE This invention relates to refrigeration and will pable of holding a tray or container 18 for mabe described as incorporated in a cooling unit terials to be refrigerated. The inner shell 15 as for a refrigerator and the method of constructillustrated in Figures and 6 has formed ading th me, jacent the rear end, an outwardly flared flange 5 An object of this invention is the provision of 19, for engagement by the ends 21 of the coil 6 an improved method of constructing a cooling loops. The outer shell 22 is similarlyformed of unit for a refrigerator so as to minimize the time a single sheet of metal and has formed thereon and labor required and to simplify and reduce an inwardly extending flange 23 forengagement the number of operations necessary for the proover the ends 24 of the coil loops. With the duction of an improved cooling unit. shells thus formed, the coil 25 formed of a single 0 Another object of this invention is the prometal tube by bending portions intermediate the vision of an improved method of constructing a ends, back and forth forming loops, shorter than cooling unit of two metal shells with an. ex-' the shells, and adapted for firm engagement with pansion coil interposed therebetween, in a manthe flanges 19 and 23 of the shells, is then placed ner to facilitate the assembly and insure eflicient upon the inner shell, with the ends 28 of the 15 heat transfer engagement between the expansion coil extending beyond the rear end of the shells. coil and the shells both on the outer and inner While the expansion coil is in this position, the faces of the coil and at the ends of the coil to outer shell is sleeved over the irmer shell and hold the coil permanently in position and to inthe coil, from the front end of the inner shell, crease the efliciency of the unit. until he fl n e 23 firmly engages the end 24 of 20 A further object is the provision of a cooling the coil loop. With the shells in this position, unit for a refrigerator comprising means intethe marginal edge at the front end of the inner gral with the sheet metal shells, for securely hold shell is rolled over the marginal edge 32 of the ing the ends of the coil loops in position adjacent outer shell thereby forming a reversely extending 5 the ends of the unit and providing means for flange 31 engaging over the marginal edge 32 of permanently sealing the shells together and to the outer shell. In a similar manner the marthe ends of the coil to prevent displacement of ginal edge of the outer shell at the rear endof the same and form an airtight space between the the unit is rolled over the marginal edge 35 of the shells in which the coil is disposed, which may inner shell, thus forming a reversely extending be evacuated to increase the eificiency of the enflange 34 engaging over the marginal edge 35 30 gagement between the coil and the shells. of the inner shell.

Other objects and advantages of this invention With the shells thus secured together by interwill become apparent from the following detail locking of the edges, they are sealed together by description together with the accompanying solder or similar readily fusible metal as indicated 35 drawing. 7 at 37 and 38. In order to, securely hold the coil 5 On the drawing: 25 in place, and to provide means for connecting Figure l is a top plan view of a cooling unit a pipe thereto, a suitable pipe coupler 41 is fitted for a refrigerator incorporating my invention. over each end of the coil and securely soldered Figure 2 is a vertical section through the unit, as illustrated at 42, 43 and 44, to the coil 25, to 4 taken on the line II-II of Fig. 1. the outer and inner shell 22 and 16 and to a rear Figure 3 is a side elevation of that shown in wall plate 45, thereby holding them all rigidly Figure 2 with portions of the outer shell broken together. The rear wall plate 45' is preferably away and portions shown insection. formed of a single sheet of metal, with an in- Figures 4, 5 and 6 are fragmentary sections wardly offset portion 46 engageable with the 45 illustrating details of construction which will be flange 19 on the irmer shell and with the flange 45 hereinafter described more in detail. 34 and the solder 38 as illustrated in Figure 6.

As shown on the drawing: The plate 45 is also provided with a flange 47,

The details of construction of this invention the rearward edge of which is sealed to the flange will be best understood from a description of 34 by solder as indicated at 48.

50 the method of constructing the same. The cool- In order to permanently press or collapse the 50 ing unit illustrated in the drawing comprises an shells 15 and 22 upon the coil 25, the shells are inner metal shell 15 which is preferably formed formed of relatively flexible material. A suitable. of a single sheet of metal having formed intesocket member 52 is sealed in the outer shell 22, grally therewith, inwardly extending corrugawhich socket member is adapted to receive a plug tions 16 which serve to support a shelf 17, ca- 53 or the like for closing the same. After the unit 55 has been otherwise completed, the air is evacuated from between the shells and 22 and the plug53placedinthesocket52tomaintaina vacuum between the shells and securely hold the shells in a firm and intimate contact with the coil 25.

Having described my invention together with the process of constructing the same, it will be understood by those skilled in the art, that various changes and modifications may be made without departing from the principle of the invention and I desire that the patent to be granted hereon shall not be limited in any manner except as necessitated by the prior art.

I claim as my invention:

1. In a cooling unit for a refrigerator, an inner metal shell and an outer metal shell, said shells being substantially rectangular in crosssection, a metal expansion coil disposed between the shells and including a plurality of longitudinally extending, loops, each said shell including a flanged portion snugly engaging the ends of the loops. means sealing the shells together at their marginal edges to form an air-tight space between the shells which may be evacuated.

2. In a cooling unit for a refrigerator, an inner metal shell and an outer metal shell, said shells being substantially rectangular in crosssection, a metal expansion coil disposed between the shells and including a plurality of longitudinally extending loops, each said shell including a flanged portion snugly engaging the ends of the loops, means sealing the shells together at their marginal edges to form an air-tight space between the shells which may be evacuated, the ends of the expansion coil extending from the shells and coupling means permanently sealed to the shells and to the ends of the coil.

3. In a cooling unit for a refrigerator, an inner metal shell and an outer metal shell, said shells being substantially rectangular in crosssection, a metal expansion coil disposed between the shells and including a plurality of longitudinally extending loops, each said shell including a flanged portion snugly engaging the ends of the loops, means sealing the shells together at their marginal edges to form an air-tight space between the shells which may be evacuated, a metal plate closing one end of the unit and soldered in place to form a permanent rear wall.

4. In a cooling unit for a refrigerator, an inner metal shell and an outer metal shell, said shells being substantially rectangular in crosssection, a metal expansion coil disposed between the shells and including a plurality of longitudinally extending loops, each said shell including a flanged portion snugly engaging the ends of the loops, means sealingthe shells together at their marginal edges to form an air-tight space between theshells which may be evacuated, the ends of the expansion coil extending from the shells, coupling means permanently sealed to the shells and to the ends of the coil, a metal plate closing the rear end ofthe unit and soldered in place to form a permanent wall.

5. In a cooling unit for a refrigerator, an inner metal shell and an outer metal shell, said shells being substantially rectangular in crosssection, a metal expansion coil disposed between the shells and including a plurality of longitudinally extending loops, each said shell including a flanged portion snugly engaging the ends of the loops, means sealing the shells together at their marginal edges to form an air-tight space between the shells which may be evacuated, and

means integral with the inner shell providing shelf-supports for holding materials to' be refrigerated.

6. In a cooling unit for a refrigerator, an inner metal shell and an outer metal shell, said shells being substantially rectangular in crosssection. a metal expansion coil disposed between the shells and,including a plurality of longitudinally extending loops, each said shell including a flanged portion snugly engaging the ends of the loops, means sealing the shells together at their marginal edges to form anair-tight space between the shells which may be evacuated, the ends of the expansion coil extending from the shells, coupling means permanently sealed to the shells and to the ends of the coil, and means integral with the inner shell providing shelf supports for holding materials to be refrigerated.

7. In a cooling unit for a refrigerator, an inner metal shell and an outer metal shell, said shells being substantially rectangular in crosssection, a metal expansion coil disposed between the shells and including a plurality of longitudinally extending loops, each said shell including a flanged portion snugly engaging the ends of the loops, means sealing the shells together at their marginal .edges to form an air-tight space between the shells-which may be evacuated, a metal plate closing one end of the unit and soldered in place to form'a permanent rear wall, and means integral with the inner shell providing shelf supports for holding materials to be refrigerated.

8. In a. cooling unit for a refrigerator, an inner metal shell and an outer metal shell, said shells being substantially rectangular in crosssection, a metal expansion coil disposed between the shells and including a plurality of longitudinally extending loops, the inner shell including an outwardly curved flange adjacent the rear end snugly fitting over the rear end of the coil loops, the outer shell including an inwardly curved flange adjacent the front end snugly fltting over the front end of the coil loops, the marginal edge of the inner shell at the front end reversely extending and engaging over the corresponding marginal edge of the outer shell, the marginal edge of the outer shell reversely extending and engaging over the corresponding edge of the inner shell, means for sealingly securing the shells together adjacent the ends of the coil loops to provide an air-tight space therebetween which may be evacuated. V

9. In a cooling unit for a refrigerator, an inner metal shell and an outer metal shell, said shells being substantially rectangular in crosssection, a metal expansion coil disposed between the shells and including a plurality of longitudinally extending loops, the inner shell including an outwardly curved flange adjacent the rear end snugly fitting over the rear end of the coil loops,

the outer shell including an inwardly curved flange adjacent the front end snugly fltting over the front end oi the coil loops, the marginal edge of the inner shell at the front end reversely extending and engaging over the corresponding marginal edge of the outer shell, means for sealingly securing the shells together adjacent the ends of the coil loops to provide an air-tight space therebetween which may be evacuated.

10. In a cooling unit for a refrigerator, an inner metal shell and an outer metal shell, said shells being substantially rectangular in crosssection, a metal expansion coil disposed between "the shells and including a plurality of longitudinally extending loops, the inner shell including an outwardly curved flange adjacent the rear end snugly fitting over the rear end of the coil loops, the outer shell including an inwardly curved flange adjacent the front end snugly fitting over the front end of the coil loops, the marginal edge of the inner shell at the front end reversely extending and engaging over the corresponding marginal edge of the outer shell, means for sealingly securing the shells together adjacent the ends of the coil loops to provide an airtight space therebetween which may be evacuated, the ends of the expansion coil extending from the shells and coupling means permanently sealed to the shells and to the ends of the coil.

11. In a cooling unit for a refrigerator, an inner metal shell and an outer metal shell, said shells being substantially rectangular in crosssection, a metal expansion coil disposed between the shells and including a plurality of longitudinallyextending loops, the inner shell including an outwardly curved flange adjacent the rear end snugly fitting over the rear end of the coil loops, the outer shell including an inwardly curved flange adjacent the front end snugly fitting over the front end of the coil loops, the marginal edge of the inner shell at the front end reversely extending and engaging over the corresponding marginal edge of the outer shell, the marginal edge of the outer shell reversely extending and engaging over the corresponding edge of the inner shell, means for sealingly securing the shells together adjacent the ends of the coil loops to provide an air-tight space therebetween which may be evacuated, the ends of the expansion coil extending from the shells, coupling means permanently sealed to the shells and to the ends of the coil, and a metal plate closing one end of the unit and soldered in position to form a permanent wall.

12. In a cooling unit for a refrigerator, an inner metal shell and an outer metal shell, said shells being substantially rectangular in crosssection, a metal expansion coil disposed between the shells and including a plurality of longitudinally extending loops, the inner shell including an outwardly curved flange adjacent the rear end snugly fitting over the rear end of the coil loops, the outer shell including an inwardly curved flange adjacent the front end snugly fitting over the front end of the coil loops, the marginal edge of the inner shell at the front end reversely extending and engaging over the corresponding marginal edge of the outer shell, means for sealingly securing the shells together adjacent the ends of the coil loops to provide an air-tight space therebetween which may be evacuated, the ends of the expansion coil extending from the shells, coupling means permanently sealed to the shells and to the ends of the'coil, a metal plate closing the rear end of the unit and permanently fixed in position to form a wall, and means integral with the inner shell providing shelf supports for holding materials to be refrigerated.

13. A cooling unit for a refrigerator comprising an inner metal shell and an outer metal shell in spaced relation from each other, each of said shells having a flange joined with the other shell to hold the same in spaced relation therefrom, and a metal expansion coil looped longitudinally between the shells and having curved portions thereof snugly engaging the flanges of the shells to hold the coil in position.

STEWART S. BATTLES.

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