US1752879A - Radiator - Google Patents

Description

April 1, 1930.

E. L. ANDERSON RADIATOR Filed Sept 15, 1928 4 Sheets-Sheet l mveu-ron EDWJED L .JNDEKJOM BY MML-+M AT'I'ORNEYQ Aga n 1, 1930.

E. .L. ANDERSON RADIATOR Filed Sept 15, 1928 4 Sheets-Sheet 2 [911281 L- INDEESGM 51 1mm -r JMZMW' ATTORNEY? April 1, 1930; E. L. ANDERSON RADIATOR Filed Sept. 15, 1928 4 Sheets-Sheet 5 M. awn 1m 7 R EN 0 WL M M m] n w Hlv HlY m N QE April 1, 1930. E. ANDERSON RADIATOR 1928 4 Sheets-Sheet 4 Filed Sept. 15

) NV E NT 0 R 520mm 1. ,M aesa/m ATTORNEY? Patented Apr. 1, 1930 UNITED STATES PATENT OFFICE EDWARD I0. ANDERSON, OF GROSS ILE, MICHIGAN, ASSIGNOR TO AMERICAN BLOWER CORPORATION, 013 DETROIT, MICHIGAN, A CORPORATION OF DELAWARE RADIATOR Application filed September 15, 1928. Serial No. 306,189,

My invention relates to radiators. It is the object of my invention to provide a radiator with a minimum of resistance to the flow of air over the radiating elements, and with the maximum of radiation of the heat to the air so flowing over the elements. Accordingly, it is my object to provide air guiding radiating plateson the heat tubes so arranged as to take advantage of the flow of air, to divide the air streams with the minimum of resistance, to eliminate eddying currents and back pressure, to facilitate the entrance of the air streams between the plates, and to then provide for the radiating of the heat from the plates into the air stream, thereby increasing the radiation from the pipes.

It is a further object of my invention to a provide steam pipes of a streamline configuration to fit with the air stream'as formed and guided between the plates and between the pipes.

Referring to the drawings :v Figure 1 1s a front elevation of the radiator. Figure 2 is a side elevation thereof. Figure 3 is an enlarged side elevation.

Fi re 4 is a plan view of one of the radiating p ates with the tubes in section.

Figure 5 is a section on the line 5-5 of Figure 4. Figure 6 is a section on the line 6-6 of Figure 4.

Figure 7 is an enlarged plan view of the construction shown in Figure 5.

Figure 8 is an enlarged plan view of the construction shown in Figure 6.

Figure 9 is an enlarged plan view of a portion of the heat radiating plate, showing the construction where the plate is struck-up, but closed, and struck-up, but open. Referring to the drawings, 1 and 2 designate headers for supporting the pipes conveying the steam, designated 3. The headers are supplied with the usual steam piplng 4 and 5. 45 These steam pipes which pass from header to header, are provided with an aerofoil section to streamlme them. The side of the pipe, in the direction of the incoming air, designated 6, is relatively blunt and streamlined, like theleading edges ofan aerofoil, while the trailing edge is sharper, as at 7. The air travels in the direction, as in Figure 4, from left to right, as indicated by the arrows.

Strung on these streamline pipes 3 is a plurality of spaced plates arranged in the plane of the air movement. These plates are of the same length but so threaded upon the steam pipes that one plate, such as 8, has its leada a ing edge 9 projecting further from the pipe, for instance, on'the left hand side than the leading edge 10 of the next adjacent plate, designated 11. a p The trailing edge of plate 8 is closer to the right-hand pip'ethan the trailing'edge of the next adjacent plate 11. Of course, the air may be driven from over the right-hand or left-hand side because-the construction is the same, and interchangeable." But for the purpose of discussion and description,we are assuming that the air is traveling from the left-- hand towards the right, 1

It will be notedthat the margins of these heat radiating plates 8 and 11 are provided with turned-over edges 9 and 10, which are blunt at the outer ends and are brought to a taper at the rear end to form an aerofoil section. The air, as shown in Figure 3, as it passes between the two'plates partakes of the form indicated by the dotted lines 12. l

I take advantage of this expansion after having entered .the plates and interpose at a suitable point within the two lates'8 on either side of the intermediate p ate 11, the streamline edge of the plate 11, which is also an aerofoil section, which serves to divide the air stream indicated by the dotted lines 12, into two air streams which pass by the narrow throat between the plate 8 and the aerofoil of the plate 11, where, as at 13, the d vided stream again expands. Thus the mln mum of resistance with the maximum of air distribution is accomplished.

' It will be understood that the success of a radiator of this type commercially depends upon the economy in moving a 'ven body of 95 air through the radiator, plus t e amount of radiation to the air that can be effected when the air has once been delivered, to the radiator and passed through it. I

This leads me to the second phase of my 100 invention, namely, the distribution of the the plane of the plates following the general line of air movement of the air between the streamlined steam tubes 3. I have found that heat is radiated by sharp edges so that by providing V-shaped extrusions in the surface of the plates 8 and 11 following the air stream I not only increase the area of the plate exposed to the air within a given area, but also provide the sharp edges for the distribution of the heat to the air.

I further find that by providing alternate ridges and slots with struck-up edges I am enabled to take advantage of the fact that there is some upward movement of the air through the slots particularly in the area adjacent the tubes 3. The open slots provide four radiating edges, while the closed struck-up portion provldes two radiating edges.

Referring to this construction in detail, it will be seen in Figure 5, as well as in Figure 4', that the struck-up ridges consist of inclined walls 14 and 15, which terminate in sharp edges 16 and 17. The open slot type shown in Figures 4, 6 and .8 provides inclined walls 14 and 15, with an opening 18 therebetween. This opening 18 has adjacent to it the sharp edges 16, 17, 19 and 20.

The air, in entering between the plates, increases in velocity due to the vena contracta eflect, and decreases in its velocity after passing the throat about two diameters. This effeet is again repeated in half values at point marked 13 on Figure 3.

a The action of these staggered plates is to -conform to the natural air flow in entering between plates, filling in what would otherwise be void space due to. the natural contraction, and following the actual lines of air force through these orifices. By staggering the plates the vena contracta loss for a given number'of plates is reduced one half. This vena contracta or entry loss is a fixed value which is thus overcome to a large extent by conforming to the natural flow of air in entering between plates.

I desire to comprehend within my invention such modifications as may be clearly embraced within my claims and the scope of my invention.

Having thus fully described my invention,

what I claim as new and desire to secure by Letters Patent, is:

1. In a radiator, a plurality of steam pipes,

a plurality of spaced heat radiating plates mounted thereon, said pipes being arranged in staggered relationship of streamline section, and said plates having their edges of streamline section, said edges being arranged alternatel outside pipes, all streamline edges being so positioned that the incoming air stream between a pair of edges furtherest from the pipes may expand to its maximum before being divided by the streamline edge of the intermediate plate, and a plurality of spaced ridges arranged in each plate between the pipes to radiate the heat from the edges of said ridges of said plates into the air stream.

2. In a radiator, a plurality of steam pipes, a plurality of spaced heat radiating plates mounted thereon, said pipes being arranged in staggered relationship of streamline section, and said plates having their edges of streamline section, said edges being arranged alternately at different distances from the outside pipes, all streamline edges being so positioned that the incoming air stream between a pair of edges furtherest from the pipes may expand to its maximum before being divided by the streamline edge of the inner inter mediate plate, and a plurality of spaced 'ridges arranged in each plate between the pipes to radiate the heat from the edges of said ridges of said plates into the air stream, said ridges being arranged in a sinuous path between the staggered pipes to follow the general direction of the air stream between the pipes.

3. In a radiator, a plurality of steam pipes, a plurality of spaced heat radiating plates mounted thereon, said pipes being arranged in staggered relationshi of streamline section, said plates having t eir edges of streamline section, said edges being arranged alternately at different distances from the outside pipes, all streamline edges being so positioned that the incoming air stream between a pair of edges furtherest from the pipes may expand to its maximum before being divided by the streamline edge of the inner intermediate plate, a plurality of spaced ridges arranged in each plate between the pipes to radiate the heat from the edges of said ridges of said plates into the air stream, said ridges being arranged in a sinuous path between the staggered pipes to follow the general direction of the air stream between the pipes, and slots arranged in saidplates having struck-up sharp edges.

4. In a radiator, a plurality of steam pipes, a plurality of spaced heat radiating plates mounted thereon, said pipes being arranged in parallel relationship of streamline section, and said plates having their edges of streamline section, said edges being arranged alternately at different distances from the outside pipes, all streamline edges being so positioned that the incoming air stream between a pair of edges furtherest from the pipes may expand to its maximum before being divided by the streamline edge of the inner intermediate plate, and a plurality of spaced at different distances from the ridges arranged in each plate between the pipes to radiate the heat from the edges of said ridges of said plates into the air stream.

5. In a radiator, a plurality of steam pipes,

a plurality of spaced heat radiating plates.

mounted thereon, said pipes being arranged in parallel relationship of streamline section, said edges being arranged alternately at different distances from the outside pipes, all streamline edges being so positioned that the incoming air stream between a pair of edges furtherest from the pipes may expand to its maximum before being divided by the streamline edgeof the inner intermediate plate, a plurality of spaced ridges arranged in each plate between the pipes to radiate the heat from the edges of said ridges of said plates into the air stream, said ridges being arranged in a sinuous path between the parallel pipes to follow the general direction of the air stream between the pipes, and slots arranged in said plates having struck-up sharp e ges. 1 1 p In testimony whereof, I afiix my signature.

EDWARD L. ANDERSON,

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