US2558345A - Condenser coil assembly - Google Patents

Description

June 26, 1951 H. a. DICKMAN CONDENSER COIL ASSEMBLY Fiied June so, 1948 IN V EN TOR.

Patented June 26, 1.951

UNITED STATES PATENT OFFICE CONDENSER COIL ASSEMBLY Harold G. Dickman, Pleasant Ridge, Mich.

Application June 30, 1948, Serial No. 36,254

4 Claims.

This invention relates to condensers particularly useful in mechanical refrigerators.

It has for its objects:

First, the production of a new and improved condenser coil or heat exchanger assembly which is highly eflicient in operation and which can be made easily and inexpensively.

Second, to provide such a condenser coil assembly in which the coil assembly, including the radiating surfaces, can be made of simple shapes which can be easily rolled from sheet metal and assembled to give an assembly having wall and projecting fins.

Third, to provide such an assembly which can be easily and simply installed on a refrigerator cabinet in such a way as to give highest efilciency in operation and without disfiguring the refrigerator.

Other objects and advantages will be apparent from the following description of the invention, which is shown in the accompanying drawings, in which i Fig. 1 is a partial perspective view of the improved coil assembly in place on the back of the cabinet of a mechanical refrigerator.

Fig. 2 is a partial perspective view of the other side of the coil assembly shown in Fig. 1.

Fig. 3 is a partial perspective view of one of the sheet metal units employed in making the assembly, and

Fig. 4 is a detailed partial sectional view taken on the line 4, 4 of Fig. 1.

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 resilient sheet metal members which provide heat dissipating surfaces and which, when in position, serve to form stacks to increase the efficiency of heat transfer and the convection currents employed for this.

The sheet metal members are preferably formed by cutting strips to the desired length and then rolling to form. They are so formed that their central portion provides a resilient clip to fit over the legs of the coil while also forming a fin and flue-forming member. They also have side members which combine, when the assembly is complete, to form a substantially continuous wall extending between the legs of the coil to permit the coil to be mounted on the back of a mechanical refrigerator without disfiguring it materially and in such a way as to produce the desired flue effect to assist the convection currents to cool the condenser.

The condenser is shown mounted in place on a mechanical refrigerator I in Fig. 1. The cabinet indicated generally at 2 has a back wall 3 on which the condenser unit is mounted.

The condenser unit consists of a series of straight, parallel legs 5, which are shown as part of a serpentine coil 4 which is here shown as continuous. The heat dissipating surfaces and lineforming members consist of the sheet metal members 6, each of which is formed with a resilient center portion 1 which has two walls 8 which are joined at 9. Near the free ends these walls are formed in semi-rounded fashion, as indicated at H], to receive the legs 5 of the tube 4. Extending from the free edges of the members 8 are members I l which lie in the same plane and unite to form a substantially continuous wall, as indicated at H in Fig. 1, when the unit is assembled.

The central portions I of the members extend from this Wall and form radiating fins. They also tend to form flue-like passages, indicated generally at l3, to eliminate eddy current and speed up the flow of air as it is heated and rises.

The members 8 are resilient and can be easily clipped onto the legs 5, where they are soldered or brazed, as indicated at H.

The unit is assembled by means of straps [5, which are attached to the members ll of the sheet metal members 6 by spot welding, as indicated at l6, thus holding the assembly rigidly in place. The brackets it are employed to mount the assembly on the back wall 3 of the refrigerator casing 2. They are provided with flanges ll, which are fastened by machine screws ill to the members l5. They also have flanges l8, which are fastened by screws I9 to the back wall of the cabinet. The wall 12 faces outwardly and the fins formed by the central portion I extend in toward the 'back wall of the cabinet.

When the unit is mounted on the refrigerator, the fins I serve as vertical partitions and the legs 5 of the tube 4 likewise extend vertically. This permits the air to pass upwardly through the unit without eddy currents, thus effectively and efficiently cooling the unit.

The unit can be simply and easily made. The members 6 are cut to length and thenrolled.

When the unit is assembled on the back of the refrigerator, the members H form a substantially continuous wall concealing the other portions of the unit, thus preventing any material disfiguration of the cabinet. The wall l2 also serves to confine the air as it passes upwardly, giving a flue action.

auasss The preferred form of the invention has been described above. It will be apparent to those skilled in the art that thecondenser 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 belng'intended only that the invention be limited to'that covered by the claims.

I claim:

1. In a mechanical refrigerator having a cabinet having a vertically-disposed wall and a condenser unit mounted on and spaced from said wall comprising a serpentine tube having a series of spaced, parallel vertically-extending legs a combination of a plurality of sheet metal members, one clipped on each leg, and comprising a pair of walls Joined at one edge and embracing a leg on their free edges to form a fin extending inwardly from said leg and a pair of fins extending in a plane between said legs to form a substantially flat wall with other such members.

2. In a mechanical refrigerator having a cabinet having a vertically-disposed wall and a condenser unit mounted on and spaced from said wall comprising a series of spaced, parallel verticallyextending legs a combination of a plurality of sheet metal members, one clipped on each leg, and comprising a pair of walls Joined at one edge and embracing-a leg on their free edges to form a fin extending inwardly from said leg and a pair of fins extending in a plane between said legs to form a substantially flatwallv with other such members.

3. A condenser coil assembly comprising a continuous serpentine tube having a series of spaced, parallel legs and a series of resilient heat transfer members, one clipped on each of said legs, each resilient member comprising a pair of walls joined together along one edge to form a resilient clip, each wall formed at its free edge to receive and'partially embrace it is clipped and each wall having at its free edge a substantially flat member extending laterally therefrom, said flat members all extending in substantially the same plane and forming a substantially continuous flat wall extendins between said legs., v 4. A heat exchanger coil assembly comprising a series of spaced, parallel legs and a series of resilient heat transfer members, one clipped on each of said legs, each resilient member oom-' prising a pair of walls Joined together along one edge to form a resilient clip, each wall formed at its free edge to receive and partially embrace the leg to which it is clipped and each wall having at its free edge a substantially flat member extending laterally therefrom, said flat members all extending in substantially the same plane and forming a substantially continuous flat wall extending between said legs.

HAROLD G. DICKMAN.

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

UNITED STATES Ps'rmrrs theleg towhich

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