US2029890A

US2029890A - Condenser for refrigerating machines

Info

Publication number: US2029890A
Application number: US755559A
Authority: US
Inventors: Delbert F Newman
Original assignee: General Electric Co
Current assignee: General Electric Co
Priority date: 1934-12-01
Filing date: 1934-12-01
Publication date: 1936-02-04
Anticipated expiration: 1953-02-04

Description

Feb. 4, 1936. D. F. NEWMAN CONDENSER FOR REFRIGERATING MACEINES Fiied Dec. 1, 19:54

Fig.2.

v Inventor; Delbert F.Newman.,.

orne

Patented Feb. 4 1936 GONDENSER FOR MAC REFRIGERATING HINES Delbert F. Newman, Schenectady, N. Y., assignor to General Electric Company, a corporation of New York Application December 1,

1934, Serial No. 755,559

10 Claims. (Cl. 25736) My invention relates to air cooled condensers of the type arranged'to surround a casing of a-- refrigerating machine and carried on a heat conducting support extending about the casing.

An object of my invention is to provide an aircooled condenser of the type referred to above for refrigerating machines which provides a rela. tively large heat dissipating surface within a relatively small space about the'casing and which is provided with smooth exterior surfaces which are easily cleaned and attractive in appearance.

A further object of my invention is to provide an air cooled condenser of the type referred to above for refrigerating machines, which is ru ged in construction and economical in manufacture.

Further objects and advantages of my invention will become apparent as the following description proceeds and the features of novelty which characterize my invention will be pointed out with particularityin' the claims annexed to and forming a part of this specification.

For a better understanding of my invention, ref erence may be'had to the accompanying drawing in which Fig. 1 is afront elevation of a re-" frigerating machine adapted to cool a refrigerator cabinet or the like, the refrigerating machine having an air cooled condenser embodying my invention; Fig. 2 En perspective view, partly in section, of the air cooled condenser and casing shown in Fig. 1, and Fig.3 is a fragmentary sectional view of the upper portion of the air cooled condenser shown in Fig. 2.

- Referring to the drawing, in Fig. 1 I have shown an hermetically sealed casing l containing a motor driven compressor unit, which supplies compressed refrigerant to an air cooled condenser I! embodying my invention. The compressed refrigerant is liquefied in the condenser II and flows t ough a conduit l2 to a flow-controlling 40 float v ve l3 from which it passes through the liquid line H to a flooded type evaporator IS. The evaporator I5 is supported on the lower side of anupper removable wall it of a refrigerator cabinet. The liquid refrigerant passing to evaporator I5 is vaporized by the absorption. of heat from the interior of the refrigerator cabinet in which the evaporator I5 is located, the vaporized re-' frigerant being collected in headers ll of the evaporator l5. The vaporized refrigerant collected in the headers fl above the level of the liquid refrigerant therein is drawn off through the suction line 8 by the motor driven compressor'in the casing l0.

The air cooled condenser II, which embodies 55 ,my invention, includes an imperforate cylindrical member made of sheets of metal l9 and 20, as best shown in Fig. 2. Complementary sinuous indentatidns l9 and 20 are formed in the sheets I!) and 20, respectively, the sheets l9 and 20 are then secured together in face engagement by 5 welding or otherwise securing them tog ther along their edges and between the indent tions formed therein. The welding may be in the form of a line weld or a series of closely spaced spot welds. The sheets are then bent into the form of m a cylinder and their ends secured together by weldingor otherwise, along a seam 22. When so assembled with the indentations in. one sheet registering with those in the other, the sheets l9 and 20 define a sinuous refrigerant passage 2| between their opposed faces which extends substantially about the cylindrical member.

A zig-zag annulus of fins 23,-made of good heat conducting material, extends about the hermetically sealed casing H), a series of slots 25 being formed in the outer edge of the annulus 23. A heatdissipating refrigerant conduit 24 is provided in the form of a helix which surrounds the casing ID and is supported in the slots 25 in the annulus 23. 25

In' assembling the condenser construction described the refrigerant conduit 24 is wound about the annulus 23 in the slots 25 formed therein. The inside diameter of the imperforate cylindrical member made up of sheets I9 and 20 is made 30 somewhat smaller than the outside diameter of the annulus 23 so that the cylindrical member may be be force-fitted on the annulus. .The inside diameter of the annulus 23 is preferably arranged to be slightly smaller than the outside diameter 35 of the casing l0. when the cylindrical memberis in position on the annulus. The assembled cylindrical member and annulus may then be for cefitted on the casing l0. Good 'heat conducting contact is thus provided betweenthe casing l0 and 40 the annulus 23 and between the annulus 23 and the cylindrical member made up of sheets l9 and 20.

Gaseous'refrigerant compressed by the motor driven compressor unit contained in the casing Ill enters the refrigerant conduit 24 at inlet connection 26, passes through the heat dissipating' refrigerant conduit 24 and enters the refrigerant passage 2| at 21. After circulating through the refrigerant passage 2| the condensed refrigerant leaves the air cooled condenser ,ll through the liquid line l2. In the operation of the refrigerating machine described, heat is dissipated from the casing Hi, the annulus 23, and the cylindrical member made up of sheets l9 and by air circulating upwardly between the casing and thecylindrical member, the air being cir-' culated by natural draft.

In this construction a large amount of heat may be readily dissipated from the casing I0 not only to the surrounding air, but also through the annulus 23 to the air circulating over the surface thereof. Also a large amount of heat may be dissipated from the refrigerant as it passes in series through the conduit 24 and the passage 2|, the heat passing through the walls of the conduit and passage to the circulating air,' It will be noted that the annulus 23 is also in good heat conducting contact with the refrigerant conduit 24 and refrigerant passage 2|, and as a result heat is transferred from the walls of the conduit and passage to the annulus 23 and then to the surrounding air. The slots 25 in the annulus 23, in which the refrigerant conduit 24 is supported, ar m'ade deep enough so that the conduit 24 is supported in ap'ortion of the annulus 23 which v is at a sufliciently low temperature to cool the conduit. As best shown in Fig. 3 the refrigerant the appended claims to cover all modifications within the spirit and scope of my invention.

What I claim as new and desire to secure by Letters Patent of the United States, is: 40

air cooled condenser including a cylindrical member surrounding said casing in spaced relation thereto, a-support of heat conducting material connecting said casing and said cylindrical mem-' ber, anda heat-dissipating refrigerant-conduit carried by said support intermediate said casing and said cylindrical member and extending about said casing.

2. A refrigerating machine having a'casing', an air cooled condenser including a zig-zag annulus of heat conducting material surrounding said casing, an imperforate cylindrical member secured to the periphery of said annulus, and a heat-dissipating refrigerant conduit carried ,by said annulus intermediate said casing and said cylindrical member and extending about said;

casing.

- 3. A refrigerating machine having a casing, an air cooled condenser including an imperforate cylindrical member surrounding said casing in spaced relation thereto, said cylindrical member including a plurality of sheets having juxtaposed faces and defining a sinuous refrigerant passage .betyveentheir juxtaposed faces, a support of heat conducting material connecting said casing and ;,said' cylindrical member, and a heat-dissipating refrigerant conduit connected to said refrigerant passage, said conduit being carried by said support'intermediate said casing and said cylindrical member and extending about said casing.

4. A refrigerating machine having a casing, an air 0 led condenser including a zig-zag annulus -of' heat conducting material surrounding said casing, an imperforate cylindrical member secured -to the periphery of said annulus, said stru'ction shown and described, and I intend in.

1. A refrigerating machine having a casing, an

cylindrical member including a plurality of sheets having juxtaposed faces and defining a sinuous refrigerant passage between their juxtaposed faces, and a heat-dissipating refrigerant conduit connected to said refrigerant passage, said con- 5 duit being carried by said annulus intermediate said casing and said cylindrical member and extending about said casing.

5. A refrigerating machine having a casing, an air cooled condenser including a zig-zag annulus of heat conducting material surrounding said casing and provided with a series of slots in the outwardly projecting portions of said annulus, an, imperforate cylindrical member secured to the periphery of said annulus, said cylindrical member including a plurality of sheets having juxtaposed faces and defining a sinuous refrigerant passage between their juxtaposed faces, said refrigerant passage being positioned adjacent the sections of said annulus intermediate said slots, and a heat-dissipating refrigerant conduit connected to said refrigerant passage and supported in said slots.

6. A refrigerating machine having a casing, an air cooled condenser including an imperforate cylindrical member surrounding said casing in spaced relation thereto, said cylindrical member including contacting metallic sheets joined together in face engagement, at least one of said sheets having a sinuous indentation formed therein cooperating with the other of said sheets to form a sinuous refrigerant passage extending about said cylindrical member,-supporting means of heat conducting material connecting said casing and said cylindrical member, and a heat-dissipating refrigerant conduit connected to said together in face engagement, at least one of said I air cooled condenser including a zig-zag annulus sheets having a.- sinuous indentation formed therein cooperating with the other of said sheets to form a sinuous refrigerant passage extending about said cylindrical member and lying adjacent the sections of said annulus intermediate said slots, and an extended heat-dissipating refrigerant conduit connected to said refrigerant pas- 56 sage and supported in said slots.

8. A refrigerating machine having a casing, an

air cooled condenser including an imperforate cylindrical member surrounding said casing in spaced relation thereto, supporting means of heat conducting material connecting said casing and said cylindrical member, and a heat-dissipating refrigerant conduit extending about said casing in heat-transfer relationship with said supporting means intermediate said casing and said cylindrical member and positioned on a portion of said supporting means which is at a sufliciently low temperature to cool said conduit. Y i 9. A refrigerating machine having a casing, an

70 of heat conducting material surrounding said c sing, an imperforate cylindrical member sec ed to "the periphery of said annulus; said cylindrical member including a plurality of sheets having juxtaposed faces and defining a sinuous refrig- 75 erant passage between their juxtaposedfaces, and a heat dissipating refrigerant conduit connected to said refrigerant passage and supported by said annulus intermediate said casing and said cylindrical member andextending about said casing on a portion of said annulus at a sufliciently low temperature to cool said conduit.

10. A refrigerating machine having a casing,

an air cooled condenser including a zig-zag annulus, an imperforate cylindrical member se- 1 cured to the periphery of said annulus, said cylindrical member including contacting metallic sheets joined together in face engagement; at least one of said sheets having a sinuous indenta tion found thereincooperating with the other of said sheets to form a sinuous refrigerant passage extending about said cylindrical member said refrigerant passage being'positioned adjacent the sections of said annulus intermediate said slots', and a heatdissipating refrigerant conduit connected to said refrigerant passage and supported in said slots at a portion of said annulus at a sufficiently lowtemperature to cool said conduit.

DELBERT F. NEWMAN.