JPH01502213A - Heat exchanger - 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] Heat exchanger This invention relates to a large number of thermally conductive circular tubes arranged concentrically in a bundle, and Equipped with a large number of thermally conductive circular tubes arranged radially at equal intervals facing the Heat for exchanging heat between at least two media in the space formed between the circular tubes It concerns exchangers. In this case, as a connection to both media and As a permanent retainer for the above-mentioned circular tubes, multiple clamps of these circular tubes can be used to These distribution heads are used to distribute the media at the front of the tube. These dispensing heads are sealed, connected and radially stressed between the circular tubes. There are intermediate chambers arranged in a concentric distribution that lead the space to the connection.

A heat exchanger of this kind is known from DE 27 48 183. child Here, these distribution heads are directed towards the end of these heads opposite the bundle tube. It has been reduced in size to form multiple seating surfaces with steps attached to the torus. These Above the seat, a circular tube is inserted as an intermediate bearing of the sealing ring, and the axis of the distribution head It is in a fixed position relative to the direction stop. Internally, the dispensing heads are circumferentially adjacent. Only two adjacent spaces form an edge-shaped collection space.6 Both collection spaces form a radial penetrating space. Connects to each intermediate chamber to be connected between two adjacent circular tubes of the bundled circular tube via a through hole. It is tied. The blade-shaped collecting space is located in front of the distribution head facing the bundled circular pipe. Transition to two adjacent connections for two media that exchange heat with each other Pulling a zero-bundle circular tube axially between two permanent distribution heads is achieved by means of an internal circular tube. is introduced through a single central elongated rod that connects the two dispensing heads to each other. be exposed.

What is required in the above known structure is that the length of the circular tube in the bundled circular tube is from the outside to the inside. For example, when dismantling this heat exchanger for cleaning, it is difficult to remove it. A flow formed between adjacent circular tubes in a 0-bundle circular tube that is difficult to extract or line up. When it comes to the cross-sectional area, forming this distribution head, the final decision is made Therefore, the above-mentioned heat exchangers belonging to the known types can be used for other purposes requiring different flow cross-sections. It is impossible to equip it for the case. This known heat exchanger is centered Since it is necessary to combine them with a rod, this increases material costs and increases weight. Additional structures will be required.

However, a very problematic drawback of this known structure is that the medium used for heat exchange is The bodies are placed adjacent to each other on the circumference and are led to the distribution head via a completely separate gathering space. This distribution space is not fully utilized in terms of heat exchange ( This results in a significant loss of space and material for this heat exchange.

In addition, by arranging the gathering spaces facing each other, it is possible to When transferring to an extended adjacent heat exchange space, the medium is first gradually dispersed in the total heat exchange space. Since there is virtually no throughflow at each end of the heat exchanger, there is no dead zone for the flow. This results in a blank area. Within this region, the solid material introduced together with the medium collects Blockage may occur. This further means that each individual heat exchange space has one or two or three said collecting space only via radial holes interrupted in the cross section of the distribution head. required by being connected to Therefore, after driving for a long time, When disassembling this heat exchanger, the tube inside the tube is filled with solid material between its ends. risk or possibility of solidification in such a way that it can only be dismantled using force. occurs.

In the end, heat exchangers that are connected in series are installed intermediately and connected to each other via a circular pipe section, etc. The connection to the heat exchange medium extends parallel to the axis from the known distribution head. Requires connection fitting on the side. This also requires considerable materials, installation and assembly. costs.

Note table flat 1-502213 (3) Therefore, it is an object of this invention to provide the same distribution throat in a manner comparable to that of a bundle tube. contributes completely to the heat exchange output and is already in the distribution head via the entire circumference of the heat exchanger. It ensures the distribution of the medium carried out without blind spots and eliminates the expense of combining bundled tubes. Eliminates space-consuming pressure means between the redistribution heads and further reduces the need for existing components. belonging to the types mentioned at the beginning, which can be easily installed in various flow cross-sections with a large degree of maintenance. The purpose is to form a heat exchanger. Furthermore, in other configurations of the subject matter of the invention, the to easily and space-savingly interconnect heat exchangers connected together. It is necessary to design the distribution head.

The above problem can be solved by this invention starting from a heat exchanger belonging to the type mentioned at the beginning. It is resolved as follows. That is, any dispensing head has radially spaced Two approximately cylindrical concentric walls with parts connected to each other, and these at the circular tube. The ends of the dispensing head opposite to the ring space formed between the walls are joined together and the dispensing A front chamber cuts off the inside of the outer wall from the outside of the head and extends through the entire radial cross section. There is an outer wall in the first outer circular tube of the bundle circular tube that can generate and release axial pressure. A second circular tube connected and placed inside the outer circular tube toward the inner wall is formed by the inner wall. The third circular tube, which is inserted into the axial stopper and placed inside the second circular tube, Permanently connected to the tube and radially spaced from the interior wall into the space defined by the interior wall. inside the front chamber through an almost hollow cylindrical sleeve inserted in the axial direction of the inner wall. The inner space of the sleeve is pressed against the stopper, and the inner space of the sleeve is opened through the center opening of the inner wall. Connected to the front chamber, the ring space between the inner wall and the sleeve is placed near the end of the second circular tube. At the top of the radial jet section of the dispensing head there is a connection to one of the media; The other medium is connected to the front chamber via an opening in the outer wall.

The above configuration of the dispensing head according to the invention first of all affects the flow of the medium in the circumferential direction. On the other hand, between the outer wall and the inner wall, on the other hand, between the inner wall and the sleeve, and also the sleeve. thus providing a virtually uninterrupted flow cross-section within the entire distribution head. can already function fully as a heat exchanger, even when the media is in the distribution head. Since it is directly distributed over the entire circumference, there are no blind spots for the flow of the medium.

In this context, it may be advantageous to make the dispensing head from a thermally conductive material; Alternatively, it may be made of glass.

Furthermore, the bundled tube can be separated from the outer wall and the outer circle of this bundled tube in the simplest way using a dispensing head. Pressurization is applied through the connections between the tubes. This is because this connection allows the The bicylindrical tube and sleeve are pressed against the axial stop on the inner wall of the dispensing head and fixedly attached. This is because he is sitting. Furthermore, what this structural form brings about is that the individual circles of the bundled circular tube Because the length of the tubing increases from the outside in, the distribution head must be removed during disassembly. The end of each tube can be easily grasped and the tubes can be pulled out one after another. Can be done.

By stopping the inner third circular tube over one sleeve, this third circular tube Formed as a set of interchangeable cartridges. Therefore, the connection connection of the sleeve If only the size of the part matches the axial stopper on the inner wall at its seating part, Various cross-sections of the third circular tube can be interchanged and used without great difficulty.

Therefore, the flow cross-sectional area between the internal third circular pipe and the second circular pipe can be varied, and different On the other hand, by incorporating a different internal cross-section of the third internal circular pipe to meet the requirements. In particular, the design of the flow introduced into the interior of the third circular pipe, the stabilization of the cross-sectional area of the internal third circular pipe, or can be configured in various ways regarding fixation.

Finally, a dispensing head of the style according to the invention is very easily subject to X-ray inspection. Can be done. This is because the ring space between the outer wall and the inner wall is easily accessible, e.g. This is because it is possible to insert a lume. In this way, you can eliminate defects without incurring large expenses. The mounting head can be separated, which often results in cumbersome and costly problems. Defects can be removed.

It is effective to use air-tight intermediate bearings, one each facing radially outward. a band and a pressure ring with an approximately V-shaped cross section surrounding both bands from the outside. Center the first circular pipe and the outer wall by applying pressure to each other in the axial direction. be. In this case, in a manner known per se, the ends of the second circular tube and the sleeve are connected to the inner wall or It can be shut off by a sealing ring inserted into the ring groove of the sleeve.

Furthermore, it is advantageous if the outer and inner walls of the dispensing head are walls forming a radial jet section. They are connected to each other via at least one radial wall parallel to the axis. child A stable, high-load-bearing dispensing head that can be manufactured as a cast part is produced as follows. It is formed.

At the remaining points, radial walls or multiple a distribution head connecting the ring space between the first and second circular tubes over the wall thickness; change the dimensions of the latter ring space and easily influence the flow velocity in the latter ring space. . Otherwise, the same treatment can be applied to the wall thickness of the sleeve, or to the flow space inside the third tube. This is possible by selecting the internal cross-sectional area of the sleeve.

Inside the third circular tube of the bundled circular tube, facing the third circular tube and having a radial interval A separate fourth circular pipe can be arranged, and in this way the flow cross-sectional area inside the third circular pipe can be The flow velocity there can be effectively determined.

In this case, it is advantageous that the fourth round tube has a conical shut-off cap, which The cap and the fourth circular pipe are radially directed inside the end of the sleeve connected to the third circular pipe. radially to this sleeve by at least three grooves arranged parallel to the axis. It is supported both in the direction and in the axial direction. With the procedure described, the fourth round canal becomes the third It becomes an isolated exclusion body for the medium introduced into the inside of the circular tube.

In all cases described, the aforementioned circular tubes are corrugated with ring-shaped or screw-shaped corrugations. It is advantageous to form a circular tube and give wave-like disturbances inside the flow of the medium involved in heat exchange. It is. Obviously, other designs of circular tubes that increase the efficiency of heat exchange should also be made. Can be done.

Among other configurations of the invention, possible configurations according to the invention are as follows. Immediately In the case of heat exchangers that are connected one after the other, bundled circular tubes connect two successive units next to each other. Installed in parallel and facing each other, and installed side by side at the connection of the flow passages of the two units. The distribution head is combined into one structural unit, within which the distribution head is mounted on both sides. The front chamber and radial injection cross section are shown with the openings in the external wall of these front chambers omitted. , are directly integrated with each other.

By the above measures according to the present invention, when the heat exchanger according to the present invention is connected in series, The two dispensing heads installed in the Matching twin heads with qualitative characteristics. But both heads are heat exchanger The areas for the two media being mixed are reciprocated in a jam-twin fashion so that they are directly mixed. It is connected to In this way, there is no need for any extra connection/coupling means, and simultaneous The heat exchangers installed adjacent to each other are commonly supported by the distribution heads connected in this way, A structure is provided that holds the regular intervals. This means that one work process at a time This also applies, for example, to two heat exchangers manufactured as cast parts and connected to each other. The nature of the invention allows it to have all the advantages already explained.

Other features and details of the invention can be found in the following description of the embodiment shown in the drawings. Given based on.

In the drawing, FIG. 1 corresponds approximately to line 1-I in FIG. 4 at the end of a circular tube heat exchanger with distribution head. FIG.

FIG. 2 is a front view of the configuration shown in FIG. 1;

FIG. 5 is a cross-sectional view of the dispensing head taken approximately along line 1--2 of FIGS. 3 and 5;

5 is an axial cross-sectional view of the dispensing head generally taken along line IV-IV of FIGS. 4 and 5; FIG.

FIG. 5 is an axial cross-sectional view of the dispensing head along line V--■ of FIG. 3;

FIG. 6 is a detailed view of the inner sleeve of FIG. 1;

FIGS. 7 and 6 are cross-sectional views taken along line ■-■ in FIG.

FIG. 8 is a front view of the object shown in FIG. 6;

FIG. 9 is a developed view of the object according to FIG. 1 in a simplified form.

FIG. 10 is an axial cross-sectional view of two distribution heads configured as a double head.

FIG. 11 is a sectional view taken along line XI-XI in FIGS. 11 and 10;

FIG. 12 is a sectional view taken along the line xn-x■ in FIG. 10;

Figure 13: Simplified and partially cross-sectional view of two double-headed heat exchangers connected in series. Reproduction diagram.

FIG. 14 is a schematic cross-sectional view of three heat exchangers connected in series.

FIG. 15 is a simplified perspective view of a large number of circular tube heat exchangers arranged in series.

The distribution head 8, made as a cast part of thermally conductive material, has an outer wall 9 and an inner wall 10. Both walls maintain a constant radial spacing from each other and form a ring space. ing. This ring space is interrupted by radial walls 12 and 13. this place In this case, the radial wall connects the inner wall 10 and the outer wall 9 to each other. (Regarding this, 3 and 4), furthermore, on one side between said two walls, an inner wall 10 is provided. There is a connection 14 forming an outlet section 15 for the chamber 16 that reaches into the interior.

On the front side, between the outer wall 9 and the inner wall 10 there is a wall extending over the entire radial cross section of the distribution head 8. A front chamber 17 is formed. This front chamber is located on the front side of the cross section of the ring space 11. It is combined with

The front chamber 17 has an opening 18 in the outer wall 9 and a center opening 19 on the front side of the inner wall 10. Ru. In this case, the opening 19 connects the front chamber 17 to the interior space 16 .

At the free end, the outer wall 9 has a radially outward, ring-shaped rotating connection. It has 20. To this connection, an external circular tube 1 with the same radial connection is sealed. The stopper 22 is placed at an intermediate position. The connecting parts 20, 21, therefore the circular pipe 1 and the outer wall 9 is pressed in the axial direction by a pressure ring 23 having an approximately ■-shaped cross section, and is pressed in the radial direction. are centered with respect to each other. This pressure ring 23 is a public The connection between the circular tube 1 and the outer wall 9 of the dispensing head 8 can be opened in a known manner. can be done.

The circular tube 2 disposed inside the circular tube 1 has a stopper 2 at the screwed part of the free end of the inner wall 10. 4, and two sealing rings 25 inserted into the circumferential groove of this inner wall. It is cut off from the inner wall 10. Larger for circular tube 2 to improve stability A polished cylindrical sleeve 39 with wall strength is provided.

The circular tube 3 disposed coaxially inside the second circular tube has an inner wall 10 approximately equal in length to the axial direction. and is fixedly connected to a sleeve 26 disposed inside the inner wall 10 with radial spacing. It is. This sleeve 26 is seated with its free end in a cutout in the inner wall 10. , is stopped by a stopper 28 in the axial direction. Against the inner wall 10 of the end 27 of the sleeve 26 This interruption is again achieved by two sealing bodies 29 seated in the ring grooves of this free end 27. It is being done.

To install the same distribution head 8 at the left end (not shown) of the bundle tube, shape it as described above. The entire unit formed can be fixedly sealed with individual pressure rings 23 and connected to each other. You could think so. On the other hand, it is not very difficult to undo the pressure ring on this entire uni-nod. It can be opened without any problems and can be disassembled into individual parts for cleaning, for example.

Inside the circular tube 3, there is always a circular shape to form a ring cross section and as an exclusion body. A circular tube 4 equipped with a conical shut-off cap 30 is arranged. The blocking cap has a plurality of passages 31 running axially parallel to each other and oriented axially and radially inward. child These passages are connected to the sleeve 2 inside the same conical enlarged part 32 at the connection with the circular tube 3. It supports 6.

Depending on the size of the circular tube 4, the radial richness of the ring space 7 inside the circular tube 3 can be adjusted individually. It can be decided according to the needs of the case. Similarly, depending on the diameter of circular tube 3, the inside of circular tube 2 The size of the ring space can be matched to the sleeve 26 and selected structurally. can. The wall strength and shape of this sleeve allows the sleeve and inner walls to 10 between the ring space 33 on one side and the flow cross section 34 in the sleeve. The area can be determined and the flow rate of each medium passing through it can be controlled.

Obviously, the structure consists of the circular tube 3, the sleeve 26, and the parts disposed therein. The unit can be easily replaced with a structural unit of different dimensions, and is compatible with the flow conditions described above. The cross-sectional area can be converted.

FIG. 5 shows a groove 35 in the inner wall 10 for a sealing ring or a groove for a sealing ring 29. The radial circumferential passages 36, 37 flowing into the connections 3 and 4 between the grooves of the tube 26 are shown. . These passageways may be used to drain leaking liquids or to contain trapped liquids. It flows into the interior of the radiating wall 12 at an axis-parallel passage 38 .

Furthermore, FIG. 5 shows an alternative to the insert formed by the circular tube 3 and sleeve 26 of FIG. Alternatively, sleeve 26 may be used to illustrate that inserts of other structural design may be utilized. The end 27 of is shown in partially expanded form.

6-8, the sleeve 26 is again shown in detail with its ends 27 and 32 together. This is a clear indication. The radial depressions at this end have greater tightening than the middle area, so , balanced against the pressure created by the heat exchange medium in the area of the sleeve.

In the end 27 of said sleeve 26 there is also a ring groove 40 for a sealing ring 29. .

The ends 32 of the conically widened sleeve 26 are now arranged in four pieces evenly spaced around the circumference. It exhibits the already mentioned channel 31, which is arranged in a conical manner.

Next, Figure 9 shows the contents of Figure 1 as an expanded diagram once again, but here Connecting fittings 41 and 42 for the medium participating in the heat exchange, no longer shown in detail, This is the illustration once again. Here, the fitting tube 41 is connected to the opening 18, and the fitting tube 42 is connected to the opening 18. Connect to the exit section 15. Furthermore, this pressure ring is opened at the pressure ring 23. There is a pressure screw 43 that can be closed.

In the case of the heat exchanger described above, one of the media participating in the heat exchange is the outer wall 9 and the inner wall. The ring space 11 between the walls 10 and the ring space 5 between the circular tubes 1 and 2 are connected on one side. between the opening 19 in the wall 10 of the inner chamber 34 of the sleeve 26 and the circular tubes 3 and 4. The ring space on the other hand flows through the front chamber 17 and the opening 18.

The other heat exchange medium is in the ring space between the jet section 15, the inner wall 10 and the sleeve 26. 33 and the ring space 6 between the tubes 2 and 3. This process is well known Flows flatly or countercurrently. Thoroughly stir the medium involved in heat exchange inside the circular tubes 1 to 4. As can be seen from the drawing, these circular tubes are used as corrugated circular tubes for stirring. It is formed. In this case, this wave is effective when the screw is rotating as it advances. It is true. Naturally, these round tubes are polished at their ends to provide the necessary connection connections. The cross section has shifted to a cylindrical cross section.

Figures 10 to 12 show connections made by cross-sectional lines XI-X■ and xn-xn in Figure 10. A twin embodiment of the dispensing head described so far is shown in a top view and two cross-sectional views. be. This embodiment uses the two dispensing heads 8 of FIG. °Rotate and install with jet cross sections 15 in opposite directions, and It is ``melted''.

Thus, the distribution shown in FIG. This is described in considerable detail below.

The double distribution helad 45 has a twin-shaped outer circumferential shape in the same way as the outer wall 46 which has a twin-shaped outer circumferential shape. It is seated on the inner wall 47 of the periphery. In this case, both walls occupy a certain radial spacing, Ring spaces that are connected to each other because they are connected to the common anterior chamber 50. Form 48.49.

Here again, both ring spaces connect the outer wall 46 and the inner wall 47, so again radially It is interrupted by walls 51-54. In this case, the radial walls 51 and 53 already have As mentioned, there are holes for draining the leaking medium.

Inside the inner wall 47 forming the two openings 55 leading to the front chamber 50, here too Also, each sleeve 58.59 is inserted in the manner described above. Internal chambers 56, 57 are formed.

In this case, the internal chambers 56, 57 pass into the ejection cross-section, which now includes both internal chambers. It merges into a common through section 60 between the chambers. Sleeves 58 and 59 It is not shown in Figures 1 and 12.

The outer wall 46 has two adjacent circulation joints 61 and 62 on the side opposite the front chamber 50. is forming. Each of these joints has one bundled circular tube of the style described above. You can connect using the method described in . In this way, such two bundled circular tubes are further transformed into a bundled circular tube. mutually without the need for another permanent formation or additional connecting pieces. It is connected to the associated flow channel and connects the two heat exchangers, shown as bundled tubes, to each other.

The inner wall 47 and the sleeves 58 and 59, together with their passages 63 and 64, also connect the bundle tubes. As already explained, it is formed in a uniform manner in order to

FIG. 13 shows a simplified external view of two heat exchangers of the type according to the invention. The continuous connection state of two bundled circular tubes is shown. In this case, the two used for the heat exchanger The connection to the medium is via the RAD 8 to one distribution and also the connection of the two heat exchangers. is carried out via a dual distribution head 45. Out of this distribution head, just a portion The bundle tube shown in FIG.

FIG. 14 shows two media connected to two media 65 and 66 which are introduced into each other in countercurrent flow. Connect the intermediate heat exchanger between the first heat exchanger and the second heat exchanger with RAD 8 to one distribution A series connection of three heat exchangers with dual distribution rads 45 is shown. this In this case, when the distribution head is simultaneously and completely involved in the heat exchange, the controller There is clearly potential for compact and simple concatenation.

According to Fig. 14, a large number of heat exchangers are arranged in one plane, but Fig. 15 shows an oblique arrangement. The heat exchangers are tilted oppositely to each other in succession through the dual distribution head 45 in view. This shows the possibility of continuous connection to even planes of digits.

C two S international search report international search report EP 8700808 SA　20211

Claims (10)

[Claims] 1. As a connecting connection for media and as a permanent holder for several circular tubes These circular pipes are placed between the dispensing heads and the dispensing heads are used as a pipe. These circular tubes are sealed with a medium at the front and connected, and tension is applied in the axial direction. These circular pipes lead the space between them to the connecting joint and are arranged concentrically. an intermediate chamber formed between the circular tubes, and at least one tube introduced into the space formed between the circular tubes. To perform heat exchange between two media, they are kept radially apart from each other and bundled coaxially. In a heat exchanger equipped with a plurality of circular tubes made of thermally conductive material, The distribution heads (8, 45) are each arranged concentrically and radially spaced apart; two substantially cylindrical walls (9, 10, 46, 47) connected to each other at a portion; The ring space formed between the walls is joined at the end of the distribution head opposite the circular tube. and cut off towards the outside of the distribution head to cover the entire radial head cross-section inside the outer wall. It has one extending anterior chamber (17, 50), and the outer wall (9, 46) is the outer part of the bundle circular tube. The circular tube (1) is connected to the inner wall (10, 47), a second circular tube (2) placed inside the outer circular tube is formed by the inner wall. A third circular tube (inserted into the axial stopper (24) and placed inside the second circular tube) 3) is always connected to the second circular pipe and has a space (16, 56, 5) formed by the inner wall. 7) A substantially cylindrical sleeve (2 6, 58, 59) are tensioned inside the anterior chamber against the axial stop (28) on the inner wall. Under the force, the internal space (34) of the sleep passes through the central opening (19, 55) in the inner wall. The ring space (33) is connected to the front chamber through the sleeve, and the ring space (33) is connected to the second circular pipe between the inner wall and the sleeve. of the medium above the radial jet section (15, 60) of the distribution head located near the end. with a connection to one and the medium to the other via an opening (18) in the outer wall. A heat exchanger characterized in that it is connected to an antechamber. 2. The first circular pipe (1) and the outer wall (9, 46) are connected under the intermediate installation of the sealing body (22). one radially outwardly directed connection (20, 21, 61, 62) and both Via a pressure ring (23) with an approximately V-shaped cross section that surrounds the coupling part from the outside. claims characterized in that they are mutually centered and axially tensioned together; The heat exchanger according to item 1. 3. The end of the second circular tube (2) and the sleeve (26, 58, 59) are connected to the inner wall (9, 47 ) or the sealing ring (29, 35) inserted into the ring groove of the sleeve end (27). 2. The heat exchanger according to claim 1, wherein the heat exchanger is cut off by the heat exchanger. 4. The outer wall (9, 46) and inner wall (10, 47) of the distribution head (8, 45) a wall (14) forming a shaped jet cross section (15, 60) and an additional wall (14) parallel to the axial direction. They are connected to each other via radial walls (12, 13, 51, 52, 53, 54). The heat exchanger according to claim 1, characterized in that: 5. Inside the third circular tube (3) of the bundled circular tube, there is a radial interval opposite to this third circular tube. The heat according to claim 1, characterized in that a separate fourth circular pipe is provided to maintain the temperature. exchanger. 6. The fourth circular pipe has conical shutoff caps at both ends, and these shutoff caps and the fourth circular pipe is the end (32) of the sleeve (26, 58, 59) connected to the third circular pipe. through at least three radial passages (31, 63, 64) that are oriented inward and parallel to the axis. and is supported radially and axially opposite the sleep. The heat exchanger according to claim 5. 7. The circular pipes (1, 2, 3, 4) are ring-shaped or screw-shaped wavy circles. Any one of claims 1 to 6, characterized in that it is formed as a tube. Heat exchanger described in. 8. Claims 1 to 7, wherein the first circular tube is shorter in length than the second circular tube. The heat exchanger according to any one of paragraphs. 9. The end of the second circular tube (2) is fixedly connected to this circular tube and is larger than the circular tube material. characterized by being formed by a polished cylindrical sleeve (39) with wall strength The heat exchanger according to any one of claims 1 to 8. 10. When connecting heat exchangers in succession, the bundled tubes of two consecutive units must be adjacent to each other. and are arranged consecutively, with a portion located at the connection of the flow passages of both units. The front head is combined into a partial unit (45), and within this partial unit, The front chamber (50) on both sides and the radial jet section (60) form the outer wall (4) of the front chamber. 6) Omit the openings and partially transition directly into each other. The heat exchanger according to any one of claims 1 to 9, characterized in that: