US1955837A

US1955837A - Method of making alpha refrigerator element

Info

Publication number: US1955837A
Application number: US336435A
Authority: US
Inventors: Anthony J Scholl
Original assignee: Frigidaire Corp
Current assignee: Frigidaire Corp
Priority date: 1929-01-31
Filing date: 1929-01-31
Publication date: 1934-04-24
Anticipated expiration: 1951-04-24

Description

April 24, 1934. A. J. SCHOLL METHOD OF MAKING A REFRIGERATOR ELEMENT Filed Jan. 51, 1929 2 Sheets-Sheet l WWQ/M l I l I l i I April 24, 1934. A. J. SCHOLL METHOD OF MAKING A REFRIGERATOR ELEMENT 2 Sheets-Sheet 2 Filed Jan. 31, 1929 attoz w new Patented Apr. 24, 1934 PATENT; OFFICE METHOD OF MAKING A REFRIGERATOR ELEMENT I Anthony J. Scholl, Dayton, Ohio, assignor to Corporation. Dayton, Ohio, a corporation of Delaware Application 'January 31, 1923, Serial No. 338,435

8 Claims.

This'invention relates to refrigerating apparatus and more particularly to an element and a method of manufacturing said element for said refrigerating apparatus.

An object of the invention is to provide a method of manufacturing a refrigerating element which element comprises a plurality of spaced fins placed on a serpentine coil.

Another object is to reduce manufacturing cost of condensers for refrigerating apparatus.

Another object is to form a condenser without the use of expensive apparatus.

Another object is to form a new condenser.

Further objects and advantages of the present invention will be apparent from the following description, reference being had to the accompanying drawings; wherein a preferred form of the invention is clearly shown.

In the drawings:

Fig. 1 is a top plan view of the condenser in the casing in which it is first formed.

Fig. 2 is a cross section on line 22 of Fig. 1.

Fig. 3 is a side view of the condenser removed from-the casing in which it is formed.

Fig. 4 is an end view of the condenser in Fig. 3.

Fig. 5 is an enlarged bottom view of the lower left hand portion of the condenser in Fig. 1.

Fig. 6 is an end view of Fig. 5.

It has hitherto been customary in the manu facture of a finned serpentine condenser to use expensive dies in placing the fins upon the tubing of such a condenser. Sometimes the condenser has been built up in sections with the result that labor costs have increased due both to the additional assembly and to the necessary close inspection for leaks at the places where the tubes are joined. An object of this invention is to do away with expensive dies used in the manufacture of condensers while still maintaining an efiicient integrallyformed tube for the refrigerant. A preferred form of apparatus for carrying out the method of the invention is disclosed in Fig. 1. A seamless coiled tube forming preferably a serpentine coil 10, preferably formed from a straight tube by making the bends or loops 11 alternating with parallel straight runs of tubing, is placed upon one or more supports or standards 13 having slots 14 for the reception of the coil 10. The coil and the supports are placed within the casing 15 having the front 17, rear 18 and the

sides

19 and 20. The

sides

19 and 20 have slots 21 on the inner side for guiding the fins into position. These slots or guides may take any other form but ofcourse are most easily formed in the manner shown. A wider slot 22ior guide is formed on either side of the slots 21 in the side 19. A

still wider slot 23 is formed in the side 20 at either end of the slots 21. The fins 12 are preferably formed as a thin rectangular sheet of metal stamped from any suitable sheet material. These fins 12 haveslots 26 in one side for the reception of the tube'or coil 10. About the central circular portion of the slot is formed the semi-cylindrical flanges 25 to make an extensive surface contact of the fins and coil. These fins are placed in the slots 21 with their slots 26 faced downward and then are pushed downward in any convenient manner over the serpentine coil 10 and into tight frictional engagement therewith. This may be done by a machine such as a press or by a hand implement as desired. End supports 16 having the base angles 24 are placed on the coil 10 at the same time and in similar manner as the fins 12. The coil 10 with its fins 12 and supports 16 is then removed from the casing or box 15. It is then preferred to fasten the fins and supports more securely upon the tube 10 preferably by providing an unbroken metallic bond between them. This can .be done more conveniently by soldering and more quickly by dipping the structure disclosed in Fig..3'into suitable fluxes and a solder bath.

\ The result is therefore a finned serpentine condenser quicklyand easily formed without the use of expensive dies for forcingthe fins upon the serpentine coils of the tube. It is obvious that the guides and supports and shape of the casing in Fig. 1 may be varied without departing from the spirit of the invention.

While the form of embodiment of the invention as herein disclosed constitutes a preferred form,

'it is to be understood that other forms might be fins to cause a frictional jointure of said coil and fins and soldering said coil and fins.

2. The method of manufacturing a refrigerator element which comprises forming a tube into a continuous serpentine coil without transverse seams and having more than one bend and alternate straight runs, spacing a plurality of fins having slotted edges, and simultaneously forcing the slots of all of said fins and the runs of the coil tohaying 8mm edges, and aimultamously farming the slats m an @22 mid me mm a? the em; Zagether by :mmmze in time, m the 28m and milks musfia iricticnai mini-me @i ma am? wmazim; mm. mm and oppusite direc