CH640042A5 - Heat exchanger - Google Patents

Description

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PATENT CLAIMS 6. Heat exchanger according to one of the preceding claims.

1. Heat exchanger with che in side-by-side surface, characterized in that the subdivision and grinding-shaped pipes for a medium, the order of the guide surfaces (5,6,13 to 17,20 to 28) of the pipes (40) in Channels (A, B, C, D, A ...) is made of prefabricated type, that the reversing loops of the tubes are laid pear-shaped plates (1) and have straight sections (3a, 3b, s), and that the greatest width of the pear-3c, 3d, ...) of the channels on their underside and the two shaped form about three times the center distances on the long sides are surrounded by heat-conducting sheets and is curved in adjacent straight channel sections (3a, 3b, 3c, 3d) Sections of the channels in reverse loops 7. Heat exchanger are deflected according to one of the preceding claims, wherein the curved channel sections (2a, che, characterized in that the subdivision and An-2b, 2c, 2d) for the reverse loops with guide surfaces (5, io Order of Guide surfaces are made in such a way that the er-6,13 to 17,20-29) are equipped, which would take overlap of the tube (40) in the reverse loop for the uprights of the tubes (40) in bending radii greater than or equal to the second turning point (11) of the preceding smallest allowable bending radius are formed, thereby characterized - reversing loop of the tube (40) and the second overlap - that between two channels (A, D), with their dung on the with respect to the center of the Pitch circle (12) straight channel sections (3a, 3d) at twice the distance of 15 from the straight channel sections (3a, 3b, 3c, 3d) the smallest allowable bending radius are arranged, two further lying side of the pitch circle (12), and that through that Channels (B, C) with their straight channel sections (3b, 3c) two overlaps a fitting (18,19,39) are arranged through, the distances between the straight the two strands of the tube (40) is included. Channel sections (3a, 3b, 3c, 3d) of the channels (A, D) and the 8th heat exchanger according to one of the preceding claims-further channels (B, C) are of the same size that the guide 20, characterized in that the pipe (40) continuously surfaces (5, 6, 13 to 17, 20 to 28) the curved channel in the form of a snake from one side edge of the mold plates (1) cuts (2a, 2b, 2c, 2d) with the permissible bending radius of the other is placed, with a maximum heating element pipe (40) writing a pitch circle (12) greater than or equal to 210 ° load requirement all straight duct sections (3a, 3), each of the straight duct sections (3a, 3b, 3b, 3c, 3d .. .) are consecutively occupied in succession and that 3c, 3d) is provided with a curved channel section (2a, 2b, 2c, 2d) 25, a separately guided rectilinear return (41) is provided, and in each case there are two adjacent curved channels.

channel sections (2a, 2b, 2c, 2d), two intersection points with one another 9. Heat exchanger according to one of Claims 1 to 7,

laterally outside the associated straight duct section, characterized in that in adjacent ducts (A to have sections (3a, 3b, 3c, 3d), and that the arrangement D) alternately feed and return are laid.

and subdivision of the guide surfaces (5, 6, 13 to 17.20 to 30 10. Heat exchanger according to one of claims 4 to 9,

28) is taken in such a way that when all straight lines are occupied by the fact that on the straight channel

Channel sections (3a, 3b, 3c, 3d ...) with pipes (40) adjacent sections (3a, 3b, 3c, 3d ...) distant side of the bearded reversing loops of the pipe (40) two intersection points on the front channel wall (31 ) an additional head channel (32)

with each other. intended for the intake and drain lines

2. Heat exchanger according to claim 1, characterized in that the walls of the head channel (32) are marked with breakthrough that the pitch circle has a loop (10) of approximately chen (33) for the introduction or execution of supply or Ablei-270 °, and that the distance between the straight lines or a straight passage of the pipes (40) verse channel sections (3a, 3b, 3c, 3d) is 12.9 cm. hen, and that in the area of the curved

3. Heat exchanger according to claim 1 or 2, thereby sections (2a, 2b, 2c, 2d ...) provided guide pieces for indicates that the tubes (40) through first guide surfaces 40, the tubes (40) with openings for one rectilinear perforations (5, 6) each of a straight channel section (3b) are provided for pipes (40) which lead straight to a first turning point (9a), then in the partial channel sections ( 3a, 3b, 3c, 3d ...) open.

circuit (12) and finally at a second turning point. 11. Heat exchanger according to one of the preceding claims.

at (11) in the respectively adjacent duct section (3c), characterized in that heat conducting plates are provided

leads, and that there are further guide surfaces (13 to 17, 20 45 hen, which a continuous plate, preferably

to 25) in the pitch circle (12) on the inside of the bend from the width of the respective mold plate (1), and channel-forming moldings (18, 19) in the form of a cut - that the straight Ka lying on the edge of a mold plate (1) -

surface of two circles, the radius of the circles nal sections each half the distance from the edge of the shape

the smallest permissible bending radius R] of the tubes (40) plate (1) speaks in comparison to the distance between adjacent ones and the intersection angle of the two circles is arranged smaller than 90 ° 50 straight duct sections, and that the loading

is. rich of the curved channel sections also with heat

4. Heat exchanger according to claim 3, characterized is provided marked baffles.

shows that in the area (2) of the curved channel sections (2a, 2b, 2c, 2d) one of its front ends defines _5

Rendered, transverse to the straight channel sections (3) is provided cavity (30), through which the part. The invention relates to a heat exchanger according to the circle (12) that the cavity (30) on its end face the preamble of claim 1.

through a rectilinear or corrugated channel wall Such heat exchangers are generally known and

(31) is limited, and that within the pitch circle (12) a further shaped piece of flooring has been used, in particular for liquid surface heating for the shaped pieces (18 and 19). According to the last

(39) the same shape is arranged. _ nits according to the state of the art are one of them

5. Heat exchanger according to claim 3 or 4, characterized in that the so-called bifilar laying technique is selected and indicates that the turning points (9a, 11) through the first len, according to the flexible pipes in such a way guided guide surfaces (5,6) and are arranged in one of the widths of the channels (A 65 and that the lines for the distance ahead and up to D) corresponding counter surfaces return of the heating medium are formed in their straight sections (8,9), which in pairs in the form of a pointed bo - Because they run alternately side by side and converge in their counterparts. Reversal areas at both ends of the straight area

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cross. Here, the flexible pipes are laid in channels of the prefabricated shaped plates and at least in their straight sections are enclosed on their underside and the two long sides by heat-conducting sheets.

From a functional point of view, such a surface heating system consists of the insulation level and the heat conduction and radiation level, the form plates made of non-heat-conducting material with the guide channels for guiding the flexible heating tubes and the heat transported through the heating tubes via the heat-conducting plates and a 10 radiation plate arranged above is emitted upwards.

In order to make it possible to adapt such a surface heating system to the heat requirements of the room to be heated, the heating pipes must be arranged in the mold plates at different intervals, with the heating pipes at larger intervals and with greater heat requirements per square meter with a lower specific heat requirement of the room in question must be arranged at shorter intervals in the mold plates. The lower limit of these distances is essentially given by the permissible bending radius of the flexible pipes, which can be made of plastic or copper.

The known bifilar laying technique (for example DE-25 AS 2 248 228) is such that a return pipe is arranged in the middle between two flow pipes running parallel to each other in the same plane, i.e. that the flow and return flow intersect in the middle of the center distance between two channels in the area of the curved channel sections. If possible, the coldest return is laid next to the hottest flow. However, this known type of surface heating has certain disadvantages, since it requires comparatively long heating start-up times and cannot exactly be described as having a high thermal output. The bifilar laying, i.e. the change between flow and return in the heating level leads to a short circuit of the heat output in the level of heat transfer on the top surface. It is therefore not only a heating output in the vertical direction, i.e. upwards, ge-40 delivers, but first a heat distribution to an increased extent in the plane, because the warm flow must first compensate for the colder return due to the available heat potential. This means that a large part of the heat output, which is contained in the heating medium of the flow, is transferred directly to the return line and cannot be available for the heating output. The bifilar laying technique is also comparatively complicated, since the correct sequence must be observed when installing.

Compared to the known prior art, the object of the invention is to create a heat exchanger of the type specified above, despite the downwardly limited bending radius of the tubes, which can be adapted to the highest heat outputs and is also quick-heating in a simple manner.

According to the invention, this object is achieved by the features specified in the characterizing part of patent claim 1.

Further advantageous developments result from the dependent claims.

An embodiment of the invention is explained below with reference to the drawing.

It shows:

FIG. 1 shows a top view of the right half of a shaped plate for a heat exchanger according to the invention, forming the area of the curved channel sections;

FIG. 2 shows a plan view of the left half of the mold plate according to FIG. 1 adjoining a parting line; and

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Figure 3 is a schematic example of laying the pipes in a heat exchanger according to the invention.

In the drawings, 1 denotes a molded plate made of heat-insulating material, which contains the area 2 of the curved channel sections for the pipelines. The mold plate 1 has generally designated channels A, B, C, D, which are formed by rectilinear channel sections 3, which merge into the actual area 2 of the curved channel sections at their upper end. 1 and 2, the center distance between the associated straight duct sections 3a and 3d of ducts A and D in the rectilinear area corresponds to the diameter of a circle, the radius of which is equal to the smallest permissible bending radius of the media-carrying pipes. In the field of such heat exchangers, the smallest permitted bending radius is the bending radius which is permissible without flattening the pipes on the outside of the bend and for free bending without a bend gauge or other aids for the respective pipe material. The rectilinear duct sections 3 are connected, depending on the room size, to shaped plates with only rectilinear duct sections, which are not shown in the drawings, however.

As shown in FIGS. 1 and 2, further channels B and C are provided between the channels A and D with their associated straight channel sections 3b and 3c, the distance between the channel sections 3a to 3d being constant and considerably below that mentioned by the smallest allowable bending radius is predetermined distance.

The embodiment shown in the drawings corresponds approximately to a scale of 1: 5 and is designed for a practical pipe spacing of at least 10 cm in the area of the straight duct sections, which was previously not possible with known heat exchangers of this type. This extremely dense covering of the molding plate 1 is achieved by the design of the area 2 of the curved channel sections and the resulting possible laying of the pipes, which will be discussed in more detail with reference to FIG. 3.

As can be seen from FIGS. 1 and 2, the rectilinear channel sections 3 in the region 2 of the curved channel sections initially merge into a fork 4, which runs on both sides of such a channel section 3 in a circular arc in accordance with the permissible bending radius on guide surfaces 5 and 6, which between two adjacent channel sections 3 lying raised material strips 7 are formed. Two guide surfaces 5, 6 of this type therefore form an arcuate contour with respect to a strip of material 7.

Opposite the guide surfaces 5, 6 there is provided a shaped body of complementary shape with counter surfaces 8, 9 such that in the fork 4 each of the channels A to D runs in an arc on both sides away from the central channel axis of the straight channel sections.

In the following consideration with reference to FIG. 1, the further course of the channel C in the area 2 of the curved channel sections with respect to the left side of the fork 4 will now be followed up.

When leaving the channel section formed by the guide surface 5 and counter surface 9, the channel C goes into a circular loop 10 at a first turning point 9a, which for reasons below is also a crossing point with the right half of the fork 4 of the channel section 3a lying to the left about which is hatched in FIG. 2 with respect to two adjacent channel sections 3, 3 'of channels B and C for reasons of clear illustration.

It is obvious that the loop 10 must have a loop angle greater than or equal to 210 °,

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in order to reach the above-mentioned tight distances of the channels A in order to reach several mold plates without disturbing the area of the to D in a straight line. In the case of the curved channel sections while maintaining the same clear exemplary embodiment, the re-looping distances of the channels A to D are to be able to be placed against one another,

angle, which is measured from the first inflection point 9a to have the channels A and B, which are on the edge in each case, of a second inflection point 11 (FIG. 2), approximately 5 the half section as the usual 270 °, the edge of the mold plate 1, which results in a spacing of the center axes of the channel-independent channels A to D from one another, so that when sections 3b, 3c are joined to one another, this leads to a distance of 10 cm. placed mold plates 1 a uniform undisturbed pattern

As shown in FIG. 2, the second turning point 11 also results. For anchoring the form plates I next to one another, at a point of intersection of the right branch of the fork 4, as can be seen in FIG. 2, a lower-lying material — the duct section 36 to the right of the duct section 3b — is provided, which strips into a corresponding one on the Un Section 3c of the channel C. on the front side of the opposite edge of the molding plate 1

As can be seen from FIG. 2, the recess 37 seen in hatching can be inserted. A similar pitch circle 12 on the inside of the radius through guide surfaces recess 38 is formed on the entire lower edge of the molds 13, 14, 15, 16 and 17, which provides the height of the side wall plate 1, by means of which the channels A exhibit. By overlaying such shaped plates (not shown) of the straight course of partial circles in accordance with the channel spacing, this is created in channels A to D.

Fig. 2 shown patterns, wherein the guide surfaces 13 and 17 As can also be seen from the drawings, are arranged on shaped pieces 18, 19, which in the top view within the pitch circle 12 between the shaped pieces sees the shape of the cut surface of two Have circles, 18 and 19 a further shaped piece 39 of the same type with the corresponding cutting angle being less than 90 °. The other guiding persons associated guide surfaces etc. are provided, surfaces 14, 15, 16 are also appropriately designed, which is used to arrange the occupancy of the ten island-shaped strips of material, which flat form plate provides the greatest possible flexibility, at least as far as it is concerned The height of the side wall of the channels A has the direction as well as the beginning of the assignment to ge-to D. ensure.

Likewise, the radius outside of a pitch circle 12 25 is defined in FIG. 3 as an example, the closest possible laying through guide surfaces 20-25, which is also shown in a snake shape. The medium-carrying speaking island-shaped strips of material are arranged. Pipe 40 is laid in the manner shown here, whereby in a practical embodiment, use 41 denotes the return, which is laid in the additional dung of plastic pipes made of polybutylene of 15.4 x 1.7 head channel 32. The dashed line 42 at-mm denotes the radii indicated in FIG. 2, namely the interior 30, for example, the outer wall of a room, on the inner radius Ri 129 mm and the outer radius R2151 mm. the laying is started. The tube 40 occurs as a

Likewise, the radii R3 and R4 of the guide surface run out, for example, at 43 and are dimensioned through the openings 26-29 of the fork 4. che 33 along a straight channel section 3 and on the end part, i.e. transverse to the main direction, the first reversing loop begins in the area 2 of the curved-straight channel sections 3, the pitch circle runs through a 35th channel section. As in FIG. 3, dashed lines at the front-side cavity 30, which is interpreted over the entire width, lie between the two regions of the curved plate 1 and which is guided by a straight line of channel sections over a considerable distance of pipes 40 in however, as seen from FIG. 2, the straight channel sections 3 are corrugated.

End wall 31 is limited. Furthermore, according to the view according to the reverse loop, the pipe 40 is opened again

Fig. 2 above the cavity 30 still a continuous 40 the other side of the room in the immediately adjacent channel-additional head channel 32 is provided, which is cut straight 3 and runs in the opposite-transverse to the plate 1 and for the reception of the area and the area curved duct sections have the same derivatives or a straight passage of the pipes reversing loop. Back to the first area in FIG. 3, the head channel 32, in particular in the case of which the pipe 40 crosses the preferred snake-shaped laying at the first turning point 9a, onto the further reversing loop and further above in the pitch circle 12 still referred to, the return takes up. corn the tube 40 of the first reversing loop. This pattern of the head channel 32 continues in its walls until, for example, the other end of the room has additional openings 33, which is the insertion or removal, after which the pipe 40 is returned as a return line 41 of inlets and outlets or the execution is straight.

Liniger tubes serve, these openings 33 as a straight-line. It is obvious that by choosing the wrap-around channels 34 are led into the bifurcations 4 and there angles of the pitch circle much closer distances than 10 cm open into the straight channel sections 3. between the tubes are possible. The one just described

As can be seen from the joint examination of FIG. 1, simple laying technique, in which progressively progresses from one and FIG. 2, which is worked together on one side of the room to another, the plate 1, which can already be separated above, provides 35 a practical advantage mentioned.

Tables embodiment around a plate of about 1 square meter, in After laying the areas of the curved channel-which in the embodiment shown in the straight section, the pipe loops lying in this before area 10 channels A to D arranged at a distance of 10 cm are still drawn through Inserts 44 (see FIG. 1) are of the same. It is obvious that, in addition to the densest possible material, such as the molding plate 1, the covering, in which each channel A is occupied, can also be used to make larger closings of the sections that have already been laid. A bifilar laying technique, for the sake of completeness it is pointed out that as described above, without changing the plate (not shown in the drawings), all types of 1 itself are also possible. Heat conducting sheets can be used, in particular

The parting line 35 consists of an approximately 5 mm wide 6J special heat-conducting sheets, as are preferred in the significant weakening of the material of the molding plate 1, on which these are described per see patent application P 29 32 551.7.

Depending on the size of the room, it can be easily broken or cut as a material for the mold plates. fireproof thermal insulation material used.

C.

3 sheets of drawings