DE1805264A1 - Heat exchanger - Google Patents

Description

OR.-INa. OIPL.-INa. M.SC. DIPL.-PMY «. OR. OIPL.-PHYS. HÖGER - LEGAL RIGHTS - GRIESSBACH - HAECKER PATENT LAWYERS IN STUTTGART

A 36 826 M ■ 1805264

o- 123

October 18, 1968

W. ROSENLEW- & CO., AB ₁ P ori, Pinnland

Heat from t from ehe r

The invention relates to a heat exchanger with tube walls which are arranged in a housing and fastened on the front side held outer tubes that pass a medium to be heated through the heat exchanger and with inside of the outer tubes coaxially extending into the wall of the outer tubes opening into the inner tubes, which is a partial flow of the transport the heat medium flowing around the outer pipes.

There are already heat exchangers or heating systems with double pipes known. In one of these known constructions, the outer of the double tubes is closed at the top,

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so that the medium flows in one direction through the inner tube and then in the opposite direction through the Outer pipe to flow back. The outer and inner pipes are attached to corresponding pipe walls. A disadvantage with this embodiment is that the heat transfer from Heat medium on the medium to be heated only possible on one side of the medium to be heated through the pipe walls is.

In another known construction, the outer pipes are fastened between two pipe walls and are open at their ends, while the inner tubes are arranged in the manner described above in the form of double tubes, the one The end is closed. The inner tubes are also attached to corresponding tube walls or plates. Since that too As the warming medium flows through the outer tubes, a heat exchange occurs from both tube sides, whereby the Performance of this heat exchange in relation to the previously described exchanger is much better. A disadvantage in this last-mentioned embodiment of a heat exchanger is, however, that the system is very complicated because of the necessary four tube plates is. Furthermore, difficult problems arise when sealing the Exchanger on and also the maintenance of this system is very costly and laborious.

The object of the present invention is to propose a structurally simpler heat exchanger which has the disadvantages the previously described exchanger avoids and still enables an optimal heat exchange.

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A 36 826 m
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October 18, 1968

The object is inventively achieved in that a heat medium in the heat exchanger introductory tube having a at the outer tubes annularly surrounding space adjacent manifold cap is in communication and further a arranged parallel to the tube wall distributor plate is provided in this annular space through which the heat medium in a first partial flow that flies through the inner tubes and can be divided into a second partial flow surrounding the outer tubes.

A heat exchanger constructed according to the invention has only two pipe walls or plates and an outer pipe which forms a unit with an inner pipe assigned to it, which makes it easier to change the tube. Also with regard to the pipe connections is the inventive Heat exchanger has been simplified, since only one inlet and outlet opening for the heat medium is necessary. In the outward ' Looking at the known heat exchanger described first, the heat exchanger according to the invention has the advantage that at a constant volume the capacity of the heat exchanger is increased from 50 to 60%. In other words, the heat exchanger can be reduced accordingly with the same capacity.

The following description of a preferred embodiment of the invention serves in connection with the enclosed

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8AD ORIGINAL

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Drawing showing a cross-section of a heat exchanger, further explanation.

The reference number 1 denotes a cylindrical housing of a heat exchanger which has cover plates 2, 3 on its end faces. On the cover 3 there is an inlet opening 4; through which the medium to be heated is introduced into the heat exchanger. The medium leaves the latter by a 5 are provided at the outlet end cover 3 in the housing 1 SWEi tube walls 6, 7 fitted _s in which a plurality of outer Rohen 8 in known manner are attached. Each of the outer tubes 8 is equipped with an inner tube 9 which runs coaxially in its interior and which has an inlet 10 and an outlet 11 which break through the wall of the outer tube. The inlet 10 and the outlet 11 can be produced, for example, by cutting off the pipe ends of the inner pipe 9 at an angle of ^ 5 °, with the cut, angled pipe ends being welded to the end section with the inner pipe 9 Outer tube 8 introduced. The outer tube 8 is already equipped with corresponding openings receiving the inlet 10 and the outlet 11. The inlet 10 and the outlet 11 of the inner tube are fitted into the outer tube in the area of the openings so that the inner tube 9 and the outer tube 8 are arranged coaxially one inside the other after welding. The outer tube 8 and the inner tube 9 coaxial with it thus form a solid structural unit. The au warming medium now flows through the hanging space formed by the tubes 8 and 9. The angled endata sections of the inner tube 9 bil in this case a certain flow resistance <, however, egg

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due to the flow-promoting, annular cross-section does not entail any significant disadvantages.

Steam is preferably provided as the heat medium, which is fed to the heat exchanger through a pipe 13 and once flows around the outer pipe 8 and on the other hand flows through the inner pipe. As can be seen from the drawing, the pipe is 13 connected to a distributor hood 12 arranged on the housing. The steam emitting the heat leaves the heat exchanger as condensate via an outlet 14 which is inside the two in the housing 1 vorgeaöienen pipe walls 6, 7 is arranged. To ensure that the steam is evenly distributed between the inner tubes 9 and the space surrounding the outer tubes 8, a distributor plate 15 is provided below of the inlet 10 of the inner tube 9 is arranged, and at such a distance that the ratio between the openings incorporated on the periphery above and below the distributor plate 15 provide the desired, even distribution of the heating medium results.

It is of course possible that the invention Heat exchanger divided and with lines or the like. can be equipped, through which the medium to be heated, after going through one of these subsections, to another subsection for the purpose of an additional Heating can be returned.

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Claims (1)

ο - 123 L October 18, 1968 ν Claim Heat exchanger with arranged in a housing, of tube walls attached to the end face held outer tubes that carry a medium to be heated through the heat exchanger pass through and with inside the outer tubes extending coaxially, opening into the wall of the outer tubes Inner tubes that transport a partial flow of the heat medium flowing around the outer tubes, characterized in that, that a pipe (13) introducing the heat medium into the heat exchanger with one to which the outer pipes (8) Annularly surrounding space adjoining distributor hood (12) is in connection and continues to be parallel to the Pipe wall (6,7) arranged distributor plate (15) is provided in this annular space, through which the heat medium into a first partial flow flowing through the inner tubes (9) and into a second partial flow surrounding the outer tubes (8) is divisible. 909821/0815