JPS6219691A - Nonshrinkable expansible conduit for heat exchanger or similar article - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Those who are aware of the heat exchanger having the advantages and benefits provided by the present invention will be familiar to those skilled in the art.

The conduits currently known and used on the market are generally cylindrical throughout their length, which prevents them from being attached to the surroundings by the pressure of cooling fins thereon. These cylindrical conduits are arranged in sequence along different cross-sections from the heat exchanger with a number of small diameter conduits so that their volume and flow capacity can be increased: It has the additional drawbacks of troublesome installation and maximum functionality.

Other types of conduits in use on the market have an elongated shape with an oval or rectangular cross-section within which secondary cross-connections are intended solely to reinforce the structural strength of the conduit. The plate may or may not be perpendicular to the surface of the conduit. Although such conduits increase the volumetric capacity of the device by replacing a uniform cylindrical conduit, they have the disadvantage of requiring the attachment of cooling fins to be carried out by welding or similar means. This is due to the lateral installation of the cooling plate and its inability to withstand expansion caused by retraction around the conduit in the absence of lateral joints.

The present invention eliminates the aforementioned drawbacks, since when the conduit is expanded for the attachment of the cooling fins, the originally chevron-shaped transverse joints begin to gradually increase the corner clearance up to an angular deviation of /r00. Thus, the lateral joints, now in a flattened configuration, prevent the walls of the conduit from collapsing to their initial position, thereby increasing the volumetric capacity of the conduit.

The form, arrangement, and operation of the invention will now be described with reference to the accompanying drawings, but the invention is not limited to the illustrations of these drawings.

FIG. 1 illustrates the arrangement of the conduits l on the heat exchanger to the cooling fins. It is noteworthy that the conduit / is surrounded by fins 2VC at right angles thereto and all at similar distances from the conduit l along its axis. When the conduit l expands, it compresses tightly the co-cooling fins λ adjacent to the conduit wall 3Vi.

Figure 2 is a top view of the cross section of the heat radiator cut along the line A-A in Figure 1. What should be noted in Figure 2 is the width of the fins to be used for the width of the heat exchanger. The expanded conduit l, having a length determined by the number λ, is pressed circumferentially against the cooling fin 2 by expansion of the surface of the conduit between the pair of joints.

FIG. 3 illustrates the conduit 1 in an initial stage before expansion (illustrated in dashed lines) and when expanded and then compressing the cooling fin 2 tightly (illustrated in solid lines). Of note,
A horizontal joint has an initial chevron shape, with the area farthest from the peak or arc of the chevron placed approximately along an imaginary vertical location.

During assembly, the conduit l is expanded and then the compression of the cooling fins is performed to achieve installation, the angle of the joint is gradually increased to /10°, at which time the joint becomes flat. During the process,
The conduit wall 3 should be pressed against the edge of the adjacent cooling fin, and the attachment of the conduit wall to the edge of the fin should be done by welding or similar. Once the expansion process and the resulting attachment of the fins to the conduit have been completed, the VC prevents the walls of the conduit from collapsing back to their original position by the action of the joint; The fitting occupies a flat position at seven points along the entire length of the conduit's flow-carrying capacity.

Although this invention has been described above with respect to its most prominent features, each of the following claims describes the original form and features of this invention.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional front view of a heat exchanger showing the arrangement of conduits to the cooling fins, FIG.
FIG. 3 is a top view of the cross section taken at A, and is a top view showing the conduit before (broken line) and after expansion (solid line). In the figure, /Vi conduit, 2 is a cooling conduit. The fin, the 3Vi conduit wall, and the fin are horizontal joints. 146'. Procedural amendment (voluntary) September 17, 1985

Claims (1)

[Claims] 1. A tubular element having an elliptical or rectangular cross section;
Place a series of horizontal joints longitudinally in a cross section, and determine which joints have the shape of a chevron, with their vertices pointing towards the axis of the imaginary midplane; A heat exchanger characterized in that it becomes progressively wider and horizontal at 180°, expanding the conduits and compressing the adjacent cooling fins, thereby preventing the conduit walls from later contracting back to their original position. conduit for expansion without deflation of a device or similar device. 2. Expansion without contraction according to claim 1, characterized in that it has multiple lateral joints of various chevron angles determined by the length, width and type of material used to construct the conduit. conduit. 3. between each pair of lateral joints it has a side wall that can become slightly curved, so that the flow volume capacity is increased; A conduit of expansion without contraction as described in .