DE1983063U - HEAT EXCHANGER. - Google Patents

Description

P.A.Q72 033 * -6.2.88

jf 19 344 / 17f Gm

IoV »Philips'Gloeilampenfabrieken, Eindhoven / Holland

Heat exchanger

The innovation relates to a heat exchanger having one or more channels through which a heat exchange f '-.,. medium can flow, and one or more / channels, through

another heat exchange medium can flow.

There is a great variety of known constructions this heat exchanger. In heat exchangers of this type, heat is between two or more in different Channels passed through media exchanged. It's ery. "■ ... wishes the temperatures of the on one side to be in the

Heat exchangers flowing in or leaving Media is as little different as possible. The efficiency of the heat exchanger is generally the better, the greater the amount of heat available for heat transfer Surface is »

An increase in the heat transfer surface generally leads to a very bulky construction, which is often the case "*" -. structural reasons are not acceptable.

To increase the heat transfer area without the.

'■■ ■:. Necessity of an extensive construction, is "before · * been struck, the ducts, of the heat exchanger with a package stacked on top of one another, more permeable to gas

... Layers, preferably of gauze of a material good

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Thermal conductivity j to be filled in. The packages are included in good thermal contact with an intermediate wall ge = "brought, e.g. by attaching the partition to the ^ package" is soldered. With this type of construction there is therefore a very large contact area between the medium and the gauze material. Nevertheless, there still remains a certain one Thermal resistance between the gauze and the partition, what resistance the heat flowing from one channel to the other must pass twice ", Eine Verrin" This thermal resistance would reduce the efficiency further improve the proposed heat exchanger »

The purpose of the furnace is to provide a heat exchanger with a very high efficiency and compact design, and is characterized in that the heat exchanger is assembled from a number of gauzes made of a material of good thermal conductivity, with one or more plates or plates between each pair of adjacent gauzes sheets of material relatively poor Thermal conductivity is disposed "speed (are) _s which plates or sheets provided with a hole pattern, and so between the gauzes to" - are ordered · that corresponding holes on opposed to each other ", said nidit lying between the holes parts of the plates or sheets that are separated from one another by gauze material adhere to one another *

This gives a heat exchanger with channels, the cross-section of which has the shape of the holes in the plates, the walls between the channels being sticky plate parts formed between the holes will «Dme gauzes extend through these walls. so that the heat transferred in a channel to a gauze

can flow through the gauze material to the other channel _e

In another advantageous embodiment of the innovation if the plates or sheets are made with a square pattern * - ger holes are provided, after which these holes are arranged in the stacking of the plates or sheets in such a way that that the sides of the squares are parallel to the -, -, -,

parallel

Direction of one set of wires of the gauze and in pairs / to the direction of the other set of wires of the gauze " ^:

In this way it is achieved that the wires of the gauze cut the intermediate wall perpendicularly, so that all wires are the same are heavily burdened and an optimal effect of the war " meaustausehers is achieved.

In a further advantageous training "there is the measure" material of sheets or sheets of paper impregnated with glue »It is advantageous to use a glue that first dries in the paper so that on it the sheets and gauzes can be conveniently stacked * The package is then heated and compressed. In doing so, adhesion and cooling take place ».

The plates or sheets can also consist of a thermosetting material as a whole, which by heating initially becomes plastic at a certain temperature and then eventually becomes plastic at a higher temperature. validly hardened »

3 ^{1 For} a further favorable design of the furnace, the package is compressed in a vacuum. This way, when the parts stick together, the

Plate between the holes air, is enclosed "The" These air inclusions can of course be the intermediate · = weaken wall. In the case of large (temperature differences, such air inclusions are particularly detrimental *

The innovation is explained in more detail using the drawing »It shows _ ■.

Figures »1 and 2 schematically _s not to scale an axial or q.uer extending section through a heat au jam" - shear concentric with each other channels.

the 'fig. 3 and 4 some parts of this heat from t from rather s on a larger scale 5

the ELg. 5 and 6 through two mutually perpendicular sections the effective part of a heat exchanger with ducts square cross-section., schematic and not to scale.,

Pig. 7 a variant of the heat exchanger according to FIGS. 5 and 6,

Fig. 8 how gauzes and sheets of paper are used in a teaching stacked up and pressed together.

In Pig »1, 1 denotes a housing, a heat exchanger <, In this case, a package is stacked one on top of the other. Gauze 2 housed, 'in which package a partition wall 3 is provided. The housing 1 is covered at both ends by a cover. 4 or »5 closed» in the cover 4 is a supply opening 6 for a medium and a discharge opening 7 for. the other medium is provided «, the cover 5 is with. . a discharge opening 8 and a supply opening 9 »

As shown in Pig »4 on an enlarged scale, the package 2 is produced in that a number of. Copper gauzes 10 and a number of paper rings 11 are alternately stacked on top of one another ». The paper rings are impregnated with glue. The package is warmed up a little, like that. that the glue is initially plastic, whereupon the whole thing is pressed together »the glue layers" of adjacent ones Paper rings "touch each other and" form a solid "Ver · = * "binding. Where there is gauze material, the paper-» Of course, don't wrestle with each other, but with the wire material. This results in a gauze package with an uninterrupted gas-tight wall 13. The selected material (paper) has a low thermal conductivity, so that there is no risk of heat transport occurring in the direction of flow. The copper guests » stretch across the formed wall so that the Heat from a medium through this copper gauze to the duct is performed, which is traversed by the other medium.

Instead of paper, rings made of plastic can also be made. turn, which initially becomes plastic when heated and then hardens.

Instead of copper, other active ingredients can also be used for the gauze a high coefficient of thermal conductivity can be used.

Although. "! Pig * 1, for example, has a heat exchanger shows two channels can of course by attaching * a majority of concentric rings comfortably a more « Duct heat exchangers are made · It is also possible in this way to make the outer wall of the package, out of paper to manufacture. . . -

A multi-channel heat exchanger with square holes Cross-section is shown schematically in the 3? Ig <, 5 and 6 «» represents »For the sake of clarity, only the gauze package is shown, set} while the lids are omitted o

The package 52 "consists of gauze 53 and paper plates 54 ° Die Paper plates are each with a pattern of square holes rather provided and are arranged in this way between the .Gazen j that the holes come to rest on top of each other »The sheets of paper are impregnated with glue. The package is, as shown in Hg. 8, in a teaching 55 housed and heated on it, - so that the glue becomes plastic and the surface layers of adjacent panels touch * A firm glue bond is formed between the panels «, or, wherever, gauze material between the Plates, a connection between the wire material. and the plates "Gas-tight partition walls 56 are thus formed that extend over the entire length of the package" With this design, not only the partition walls, but also the outer wall of the package are formed.

In the choice of gauzes and in the manufacture of the same it is arranged that they can be arranged with respect to the sheets of paper so that the sides of the squares run in pairs parallel to the wire direction of the gauze * From-Fig. 5 clearly shows that the wires then all perpendicular to the partition walls, causing the wires to all transfer the same amount of heat, so that one good effect of the heat exchanger is ensured »--This applies to the heat exchanger according to Tig »5 only for the .inner channels »Have the channels on the outer wall of course, a smaller surface area of the partition walls, through which heat is required, should, so that these

Wall surface and the gauzes that are passed through transfer more heat, must as "with the inner canals the lall is *

To make sure _? that lie on the outer wall Ka "ducts in Toezug of the flowing medium, a same intermediate walls toe rf laugh adhere., the surface of the cross section of the channels is reduced to half thereof of the channels 61 60, while the channels 62 on the EWC> points have only a quarter of the cross-section of the channels 61 (see I? ig »7) · The heat exchanger obtained in this way has a very good efficiency and a compact construction« «-. kind, the craze being the same everywhere. Amount of heat transported.

Protection claims

"8th-

Claims (2)

RA.072 033-6.2.B8 protection claims 1. heat exchanger? who has one or more channels? can be obtained by flowing a heat exchange medium _s and one or more _channels} by the other heat "exchange medium can flow, characterized ₉ that the heat exchanger is assembled from a number of gauzes of a material of good thermal conductivity, where" adjacent between each pair gauzes a , or several plates or sheets of a material with relatively poor thermal conductivity is (are) j which sheets or sheets are provided with a hole pattern and are arranged between the gauzes ₅ that corresponding holes are opposite one another ₉ where ** the holes between the holes are not covered by Ga "Zen material separate parts of the plates or sheets adhere to one another, ... ~ ■ 2. Heat exchanger according to claim 1, _P characterized in that the plates or sheets are made of paper and adhere to one another or to the intermediate material of the gas-permeable layer by a glue connection, so that a gas-tight wall between the Channels is present. 3 »Heat exchanger according to claim 1 or 2 _S wherein, the gas permeable layers are formed by gauzes, characterized« in that the plates or arches are provided with a pattern of square holes _? with the sides of the holes running in pairs in the direction of the wires of the gauze » 4 · Heat exchanger according to claim 1 _S 2 or 3? characterized by this _? that the gas-permeable layers of copper _s are preferably made of copper gauze "