DE1501666A1 - Pipe element for heat exchanger - Google Patents

Description

P 15 Ol 666.7 Berlin, September 18, 1968

E 146

Dr. -Ing. Heinrich pre-sale 1501666

1 Berlin 33 (Sihmargendorf). Davoser Str. 2b Pipe element for heat exchangers

The invention relates to a tubular element for heat exchangers, consisting of a preferably vertical, to a lower distributor and upper collector connected pipe with located inside the pipe termination and with several, in a heating medium flow protruding pipes connected in parallel in the coolant flow, oie in each case start from the vertical pipe below the termination point and above this open into the vertical pipe again.

In a known pipe element, several U-shaped pipes are based on a vertical pipe, with between the exit and Entry of these pipes in the vertical pipe a termination point is provided. The U-shaped tubes connected in parallel in the coolant flow form a heating surface with a certain height, but this height is more limited than the innermost U-shaped tube with its The connecting ends should be as close as possible to the end pieces in order to vertical pipe along its entire length to maintain cooling, and insofar as it is desired, the extension of the perpendicular To choose parts of the U-shaped pipes as small as possible in order to avoid the pipe sections that are in parallel flowed against by the heating means because of the worse Keep heat transfer short. This results in only a small amount of lift in the heating surface itself. However, they are greater ° Lifting heights desired, oa this a more secure coolant circulation

result,
ro

* >> In order to achieve this goal, a pipe element is described in the introduction

mentioned genus suggested that the connecting ends of each aer ^ pipes connected in parallel and bent to form a meander ribbon with a

at least half of the total height of the meander band are connected to a vertical pipe and the tube piece enclosed by the inlet point of the inner meander band pipe β and the termination point is connected to an unheated return line existing high lift height on the one hand and it is on the other hand the new documents iah. / _h >,> ~~. ..,.,., ^ uj α _υ * Anuujunusues. v.4. a. \ m

Cooling of the between the termination and the junctions of the Secured meander pipe located piece of the vertical pipe. The unheated return line is advantageously just below the confluence of the inner meander ribbon tube from the vertical tube and re-enters it just above the end parts. This creates a circuit through the vertical pipe section and the return line, which ensures adequate cooling, whereby it can also be recommended that the winding of the inner meander ribbon pipe, which is parallel to this vertical pipe section, close to the Place a vertical pipe in order to achieve a certain amount of shielding.

The subject matter of the invention is shown in an exemplary embodiment which shows a tubular element in view.

A vertical pipe 1 is connected to a lower manifold 2 and upper Collector 3 connected. Inside the tube i is a termination part

4 provided, below which several, parallel in the coolant flow switched tubes 5 go out. These tubes protrude into a heating medium flow and open again into the above the end parts 4 Tube 1 to discharge the working fluid to the collector 3. The pipes

5 are bent into a meander ribbon with a considerable amount of lift in the heating surface thus formed.

The connection ends of each tube 5 have a distance h from one another which corresponds to at least half of the total height H of the meander belt. The pipe section 1 * bounded by the junction of the inner meander tube 5 * and the termination point 4 is provided with an unheated return line 6 to maintain a coolant flow in this pipe section, which ^{branches off shortly below the junction of the inner meander tube 5 * from the pipe section I 1} and is short above the terminating parts 4 in the pipe piece I ¹ re-enters.

909822/0702

Claims (2)

line P 15 Ol 666.7 ^D ° ^Ö Berlin, m 9.1968 E 146 Claims (1.1 Pipe element for heat exchangers, consisting of a preferably vertical pipe connected to a lower distributor and an upper collector with a termination point located inside the pipe and with several pipes protruding into a heating medium flow and connected in parallel in the coolant flow, each of which is perpendicular below the termination point of eggs Extend tube and open again above this in the vertical tube, characterized in that the connecting ends of each of the parallel-connected tubes (5) bent to form a meander band with a distance of at least half the total height (H) of the meander band from the vertical pipe ^{(1) are connected and the pipe section (I 1} ) enclosed by the inlet point of the inner meander tube (5) and uer termination point (4) is provided with an unheated return line (6). 2. Pipe element according to claim 1, characterized in that the return line (6) starts just below oer Einmünüung oes inner meander ^{tube (5 1} ) from the vertical tube U) and just above oer end parts (4) re-enters oieses. 909822/0702 Blank page