US2610039A - Refrigerator condenser coil assembly - Google Patents

Description

Sept. 9, 1952 H. G. DICKMAN 2,610,039

REFRIGERATOR CONDENSER COIL ASSEMBLY Filed June 30, 1948 JNVENTOR. //4POA0 G D/cA MA/v fizhww 3 Sheets-Sheet l INVENTOR.

3 Sheets-Sheet 2 ATTO/P/VA'VS 7 /74/POA0 6 D/CK/VWA/ H G DICKMAN REFRIGERATOR CONDENSER COIL ASSEMBLY Sept. 9, 1952 Filed June 30, 1948 Sept. 9, 1952 H. G. DICKMAN 2,610,039

REFRIGERATOR CONDENSER COIL ASSEMBLY Filed June 30, 1948 3 Sheets-Sheet 3 INVEN TOR. 614F040 v G fl/c/mm/v Patenteci Sept. 9, 1952 ASSEMBLY uamacrmckman, Pleasant Ridge. Mich. "npplicati'cn June s 0, 194's, seriar'uo: 36,253

is "invention r'lat'es' to eoiitleiisers primarily useful m coiinectibm with mechanical re'frigera- 'li irstl the production of a new:

heat excha'ng l inexpensively; i Seconw t p'rtivide SUGh 'ai -GGH which-samba simply;'and easily assembled from mnedmetal shapes w-hic-h canfbeproduced mos t inexpensively and whi'ch are particul'a rly adapted*ifor assem- 'lal-yuin-t the coil :to lprovi'de a wall lconstruction, extra radiation surfaces for dissipating 'h'eat ajnd a stack arrangement and -flue action to assist in causing a circulation of air through the coil.

Third, to provide suclva-coir-Which can be made up as a unit and applied -'toa standard mechanical refrigerator cabinet will an incon1- spicuous mannerand insucha way as to give highest emciencym operation.

Other objects and advantages will be apparent from the -fiillowing-- descriptien otthe invention, which is shown-inthe accompanying drawings, in which FF ig. l zista perspective View-of a me 'riical ref fiigra tor with the-improved coil ins-talled thereon. i

-. Fig. :2 .isxca perspective viewi "the coil -as's'embly showing how the tparts ;-are ;assembled.

Fig. 3 is a detailed partial sectional view taken on theli'ne 3, 3 of Fig. 2. I p f *Fig; 4- is -a--perspective"of the"assembly"itaken fi'omthe iipposite side of Fig.2;and

Fig. 5 is a perspective view of one of the sheet metal units employed in making up the assembly.

The condenser unit which comprises this invention is made up of a coil, which can be a continuous serpentine coil, having a series of straight, parallel legs, between which are disposed hollow, open-end sheet metal members which provide heat dissipating surfaces and which, when disposed vertically, serve as stacks or fiues which greatly increase the efliciency of the condenser by increasing the flow of the air past the heat transfer surfaces and thecoils. The hollow tubular sheet metal members are formed from sheet metal strips cut to length, preferably by rolling. They are preferably so formed that each has a flat side which, in combination with the other fiat sides, forms a continuous wall extending between the legs of the coil, thus providing an integral surface which may assist in confining the air to give flue action and which can be exposed when the unit is mounted ona refrigerator withdimproved out disfiguring the same, thus eliminating-the necessity --1dr any 'cencealing walls. The sheet metal r'nembers- 1 preferably slotted longitudii ally I to 'p'rovi'de' resiliericy which materially aids in assembling the iiriit -and in' maintaining 'the tube ana holldws'heet metal -meinb ers *in engagement during manufacturing "and thereafter. The side walls of the hollow members are cenf-ormed to the tube so afs tofit-therearound sc that" when they a1 bra'aed or sold-red' together=there-wi11 be adequate new-transfer from" I the tubes to 'the sheet metal members. In practica -the assembly meuzited witlr -the legs "of the tub'e' and =the she'e't metarm'ern ers erteriding vertically. These members -thus ffect i become stacks or 5 flues which a'ssist n he circulation of the; aimand eliminate any He'dtiy curre'n'ts which might tend to slow:ddwrnthe 'flow ot air past the coil. 1

i In: the drawings the unit is shcwn installedon a mechanical acme-cram I whicl-iistshown in a back perspective View, with' th'e coil asse'mbly fastened to the back wall 2 of the ca'bihea w hich is indica't'edgenerally at3. i

#:Ifhe condenser consists traseaes o'f straight, parallel legs; 5; which are shown as-part or the serpentine ctube': d'iwhic'h here s'hown as continuous. i h Between ad j aoent; "iparallel legs 1 5 are inserted the-.lopen-end ifsheet :-metal 1 "members 6. Ihese members -arevpreferably cut to the-length desired f 0121 anwgivemasseiribly. and theniformed b;y -rolling. hEachi memberxhas a flat base 1 which, with the. :fiat'sbases 11' et the Mother members, forms 1 a continuous wall 8 extending between the legs 5 of the tube 4. Side walls 9 extend from the base 1. Near the base 1 each side wall is formed with a half-round In to fit the legs 5 of the tube. The side wall then extends away from the base as shown at H in Figs. 3 and 5, to a central longitudinal slot I2 forming a substantially closed tube which is open at its ends and which in the vertical position serves as a stack with the: walls serving as heat transfer surfaces.

The longitudinal slot provides resiliency in the sheet metal members s that they can be easily assembled in the unit by sliding them between the legs 5. How this is done is indicated in Fig. 2, the arrow showing the direction in which the sheet metal members are pushed for assembly.

The assembled tubes and sheet metal members are joined by brazing or soldering, as indicated at I3. A suitable supporting frame consists of a series of metal straps M to which the flat bases I are attached as by spot welding, as indicated at I5. Bracket members It are provided for atand adjacent the legs, said Walls being shaped near the base to fit around the adjacent leg and extending between the legs and beyond the plane thereof to form hollow flues parallel to said legs. the free edges of said walls extending into proximity to one another but being unconnected whereby said wall members may be flexed on insertion between legs to conform to irregularities in said serpentine tube to establish and maintain contact between each of said wall and the adjav cent leg throughout the length of said wall withj out deforming said tube.

members 6 extend toward the wall of the cabinet.

' Y serpentine tube having a series of spaced straight They are thus protected and concealed and are held in spaced relationship from the rear wall of the cabinet providing an air space through which air can circulate. The circulation is caused by convection and the air passing upwardly through the unit and the lines or stacks eliminates the.

heat from the condenser and efiiciently cools the unit.

The unit can be manufactured simply and inexpensively because of the nature of the sheet metal members 6 which canbe cut to length, then formed by rolling and then assembled, making it possible to assembleany desired size of unit depending upon the length oftube bent into the serpentine form.

The condenser is highly efficient in operation. It is possible to run under very high back pressure and at very high temperatures with cooling to lower temperatures. p

The preferred form of the invention has been described above. It will be apparent to those skilled in the art that the condenser of this invention may be changed in form without departing from this invention. Although the preferred form has been described, there is no intention of limiting the invention to this form, it being intended only that the invention be limited to that covered by the claims.

Iclaim:

1. A condenser unit comprising a continuous serpentine tube having a series of spaced straight parallellegs interconnected by bights in the .tube and having fitted between said legs and in contact therewith for substantially their entire length a. series of nonintegral sheet metal members each comprising a substantially fiat base, which, with the bases of adjacent members, forms a flat wall section joining said legs and each memberhaving side walls extending fromthe sides of the baseand substantially perpendicular thereto 2. A condenser unit comprising a continuous parallel legs interconnected by bights in the tube and having fitted between said legs and in contact therewith for substantially their entire length a series of nonintegral sheet metal members each comprising a substantially fiat base, which, with the bases of adjacent members. forms a flat wall section joining said legs and each member having side walls extending from the sides of the base and substantially perpendicular thereto and adjacent the legs, said walls extending between the legs and beyond the plane thereof to form hollow flues parallel to said legs, the free edges of said walls extending into proximity to one-another but being unconnected whereby said wall members may be flexed on insertion betweenlegs to conform to irregularities in said serpentine tube to establish and maintain contact between each of said walls and the adjacent. leg throughout the length of said wall without deforming said tube.

HAROLD G. DICKMAN,

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,961,070 Murphy May 29, 1934 2,071,182 Steenstrup Feb. 16, 1937- 2,090,417 Hull Aug. 17, 1937 2,123,366 Kehr et al. July 12, 1938 2,279,272 Anderson et al. Apr. 7, 1942 2,430,774 Lynn Nov. 11, 1947 2,482,951 Vonk Sept. 27, 1949 FOREIGN PATENTS Number Country Date 403,899 Great Britain Jan. 4, 1934 55,406 Sweden Apr. 2, 1921

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