JPS63306397A - Plate-shaped 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 Field of the Invention The present invention relates to a plate-shaped heat exchanger, which has continuous upper and lower closing walls and longitudinal webs integrally connected to the walls. A plurality of flow passages for the heat transfer medium are formed separately between the two closing walls, and within the free end area of the heat exchanger there is a collecting conduit formed entirely between the transverse passages. The collecting conduit is connected to the individual flow passages, which are tightly closed to the outside and have built-in inlet and outlet pipes for the heat transfer medium. Concerning the type of thing that is being done.

BACKGROUND OF THE INVENTION In a plate-shaped heat exchanger of the type mentioned above, which is known from DE 32 41 842, the connection for the inlet conduit to the transverse channel is designed as a flat nozzle. The connection of the flat nozzle to this transverse passage is effected by pushing the nozzle closely into the free end of the heat exchanger in axial alignment with its flow opening.

A disadvantage of this known heat exchanger is that, at the free end of the heat exchanger plate, the collecting pipes forming the transverse passages are connected to a longitudinally extending web between the upper extension of the heat exchanger and the lower closing wall. It is formed by the partial removal of . At this time, the transverse web between both closing walls is cut to the appropriate length or removed, and each end of both closing walls is then connected under heat and pressure and possibly adhesively. They are closely interconnected by intervening members. Into the horizontal passage formed in this way, the heat transfer medium flows in due to pressure through all the valves of the inlet conduits, is diffused in the horizontal passage, and is then separated by a longitudinally extending web. The flow passes through each flow passage to a cross passage at the opposite free end of the heat exchanger plate, in which an outflow conduit for the heat transfer medium is contained.

Pressure loading of the cross passages by the heat transfer medium has unfavorable consequences.
That is, when the transverse channels are loaded with pressure, their ends act as target tearing points in the area of the cut in the web, and the pressure of the heat transfer medium in the axial direction causes the web to separate and form the flow channels of the heat exchange plate. This may result in tearing. As a result, the pressure load capacity of the heat exchange plate as a whole becomes relatively small δ.

OBJECTS OF THE INVENTION It is therefore an object of the invention to improve a plate heat exchanger of the type mentioned at the outset in order to improve the axial direction of the webs in the region of the free end to form all the transverse passages and to form all the separation of the flow passages. The purpose of this invention is to avoid the incision of the web and thereby prevent the occurrence of large tearing of the web within the area of the incision during pressure loading.

According to the invention, the above-mentioned problem is achieved in that the collecting pipe is formed as an elongated hollow body and rests on the closing wall of the heat exchanger plate in the corresponding end area, and The problem is solved by completely or partially removing the closed wall region located below the hollow region of the joint, leaving the web behind, so that the hollow region is also connected to the flow channel in this region. Ta.

Embodiment According to an advantageous embodiment of the invention, the elongated hollow body of the collecting conduit is a tubular element, which element has an axially extending opening and a continuous flange-shaped part at the free end of the opening. A protrusion is formed integrally with the tubular member, and the tubular member is closed at its end face. This flange-like extension may be directed inwardly or outwardly.

The tubular element can also be mounted in a plane on the associated closing wall, the inner part of the tubular element forming the transverse channel being able to flow through the heat exchange plate through the wall opening extending in the axial direction. Directly connected to the passage δ.

The tubular element can also be mounted in steps on the associated closing wall, with one continuous flange in the connection structure of the tubular element and the heat exchanger plate to ensure a tight flow path to the surroundings. It may be possible to form the closure simultaneously.

Furthermore, it is advantageous if the inlet and outlet conduits for the heat transfer medium are closely connected axially or radially to the direction of the flow path into the collecting conduit.

This makes it possible to create an optimal inflow of the individual flow channels even in wide heat exchanger plates.

(7') The tubular elements can be connected to the respective surfaces of the heat exchanger plates on both sides, i.e. facing each other or alternately, if necessary.

Advantages of the invention An advantage of the invention is that the longitudinal webs separating the entire flow path of the heat exchanger plate are prevented from being torn apart significantly within the axial cut at the free end of the heat exchanger plate. In the prior art, a transverse passage was formed within the cut range of the plate. According to the invention, each closing wall of the heat exchanger plate is removed only at the corresponding surface within one view of the tubular member forming the conduit. This removal therefore takes place only up to the point where the corresponding closing wall of the heat exchanger plate is pierced. In this case, as soon as the respective opening is formed in the flow channel of the heat exchanger plate, the corresponding penetration forming process ends, so that also within the area of the penetration opening there remains a web which separates all the flow channels from each other. I am forced to do it. This process therefore leaves only the flow channels open on one side. A tubular element is subsequently arranged in the area of the one-sided opening of this flow channel, with an axially extending wall opening of the tubular element being provided above said opening leading into the flow channel.

A tight connection of the heat exchanger plate to the associated closing wall then takes place in the area of the flange-like projection of the tubular part. This connection takes place, for example, by welding, and any type of welding such as ultrasonic welding, friction welding, hot tow welding, etc. can be used. The only prerequisite is a tight type of coupling to the heat exchange medium. Furthermore, even if the heat exchange medium is gas! In order to be compatible with liquids, the connection between the flange-like projection of the tubular part and the associated surface of the closing wall must be formed in a fluid-tight and gas-tight manner.

The connection between the tubular element and the heat exchanger plate is also possible in a planar manner, so that the heat exchanger plate should additionally be closed at its free end in an air-tight and liquid-tight manner. However, the connection of the tubular elements can also be made such that the heat exchanger plate is cut at an angle, for example in the area of its free end, and the 7 flange-like projections of the tubular element coincide with the upper closing wall of the heat exchanger plate on the one hand and with the upper closing wall on the other hand. This may also be done by tightly joining the lower closing wall on the oblique plane. In this case, the upper flange extension is tightly connected to the outer cut surface of the upper closing wall, and the lower flange extension to the inner cut surface of the lower closure wall. In this case, each web of the flow channel is now cut in the 9-mentioned inclined plane.

However, the arrangement of the tubular elements on the heat exchange plate can also be carried out stepwise, with one flanged extension on the upper surface of the upper closing wall and the other flanged extension, for example, on the lower closing wall. on the inner surface of the valve, and in both cases it is closely connected to the closing wall.

Furthermore, in all the abovementioned connection methods, each end face of the tubular element is connected with the respective wall surface of the heat exchanger plate with the same degree of sealing, and likewise the inner diameter of the respective tubular element relative to the outside is It is no surprise that it is tightly closed.

Embodiment FIG. 1 shows a collecting conduit 1 as a hollow body with one side open.
is shown. This collecting conduit 1 has a semicircular shape and, within the area of its wall opening 2, has at its free end a flange-like projection 3. It has 4tl-. The hollow body is tightly closed to the outside in a region 5.6 on the end face. The collecting conduit 1 shown in FIG. 1 is constructed in one piece, for example as an injection molded part.

However, it is also conceivable for the collecting conduit 1 to be manufactured in one piece, for example by blow molding. In this case, it is also possible to produce double conduits and separate them in the area of the contact surface after production. Furthermore, it is also conceivable to close the ready-made tube part tightly at its end face by means of the area 5.6.

In the second example, the end of the heat exchange plate 7 to which the collecting conduit 1 is attached is shown in partial cross section. As can be seen from this figure, the flange-like projection 3.4 is in close contact with the upper closing wall 71 of the heat exchanger plate 7. This upper closing wall 71 is removed in an area 72, ie below the wall opening 2 of the collecting conduit 1, so that the area 'g4+j of the collecting conduit 1 is directly connected to the heat exchanger plate through the entire area 72. 7 flow passages. The free end 73 of the heat exchanger plate 7 is connected in a gas-tight and liquid-tight manner to the upper closing wall 71 of the heat exchanger plate 7 via the flanged projections 3, 4. In the illustrated example, it is also closed air-tightly and liquid-tightly.

In the example shown in FIG. 3, a diagonal cut surface is formed on the free end 73 of the heat exchange plate 7, and a collecting conduit 1 is formed on the slope 74.
is tightly attached. In this case, the flange-like projection 3 of the collecting pipe 1 is tightly connected to the outer region of the upper closing wall 71, and the flange-like projection 4 is also tightly connected to the inner region of the lower closing wall 75. tightly coupled.

The partial sectional view in FIG. 3 shows the web 7 in the heat exchanger plate
6 is shown, the web 76 adjoining the inner chamber 2 of the collecting conduit 1 with its cross section 74. Each of the other webs 76 of the heat exchange plate 7 is likewise shaped with an oblique cut surface, so that in this example a structural shape is formed in the cross-sectional area when viewed from above, in which the web T6 Each flow passage terminates in an oblique cut area 74.

Furthermore, in the example shown in FIG. 4, the collecting conduit 1 is stepped and rests on the end of the heat exchanger plate. In this case, in the area of the inner opening 2 of the collecting conduit 1 the upper closing wall 71
are suitably removed, thereby forming a remaining cross-section of webs 76 upwardly towards the inner openings 2 of the collecting conduits 1, so that the inner openings 2 of the collecting conduits 1 are connected to the individual webs 7.
6 are directly connected to each flow passage between the two. The flange-shaped projection 3 rests closely on the surface of the upper closing wall 71. The flange-like projection 4 is designed in a step-like manner and extends downwardly with a web 76 into the area of the lower closing wall 75 and is again connected in an air-tight and liquid-tight manner at the rib. If the welding process is selected for this connection,
During the welding operation, the web 76 is flattened until the step shown in FIG. 4 is formed, for example. The bath contacting material of the web T6 then flows into the flow channel in the area of the flange-like projection 4, located below it, and also into this rear closure, in which the gas-tight and liquid-tight connection of the collecting conduit is carried out. Form a closure. The flange-like projection 4 can be welded down until it reaches the inner region of the lower closing wall 75.

The connection between the inner opening 2 of the collecting conduit 1 and the flow channel of the heat exchanger plate 7 can be achieved, for example, by opening a corresponding area of the upper closing wall 71 over the width of the inner opening 20 towards the flow channel and This can be done by bend-out milling in such a way that the resulting web cross-section is maintained.

Such a structure is shown in FIG. In this processing method, no further tearing occurs in the notch area formed in the thin line direction of the Unidef 6 by the axial incision, which is a disadvantage in the prior art. The same applies to the example of FIG. 3, in which the web 76 is cut out in accordance with the bevel 74. Similarly, in Figure 2,
A construction is shown in which the upper j closing wall 71 is cut to each web within -02 of the inside.

It is also within the scope of the invention that the upper closing wall 71 is not completely cut out, but holes or punchings of any cross-section are formed in the closing wall, for example via a plurality of flow channels, and above these Attach the collecting conduit 1, and then install the conduit 1 within it.
It is also possible to connect the inner chambers 2 directly to the flow channels of the heat exchanger plate 7 via the openings.

According to the invention, the inflow and outflow conduits for the introduction of the heat transfer medium into the collecting conduit 1 are provided, for example, in the collecting conduit 1 such that the heat transfer medium flows through the collecting conduit in the axial direction with respect to the flow direction of the channel. It can be arranged so as to be guided within the 1. However, the influx
The outlet conduit can also be connected to the collecting conduit 1 perpendicularly to the flow direction of the flow channels of the heat exchanger plate 7 or via an end region 5.6.

According to the one-sided arrangement of the collecting conduit 1 to the heat exchange plate 7:
Such a heat exchange plate 7 is laid, for example, in a planar manner towards the top, while in this case a collecting conduit 1 protruding in the lower area, for example the insulation material required as a heat exchange plate for this laying. It is possible to project into a preformed passageway located within. In this way, it is possible, for example, with the heat exchange plate 7 to provide underfloor heating over a large area, which area lies completely planar in the upward direction.

In this case, the individual heat exchange plates 7 can be connected to each other via suitable inlet and outlet conduits and to the thermoformer via inlet and outlet conduits for the heat transfer medium.

If the heat exchange plates 7 are designed with very large dimensions, it is advantageously possible to arrange the collecting conduits 1 section by section in close spatial proximity to one another. This advantageously makes it possible, for example for heating at low temperatures, to heat individual segments of the longitudinal heat exchange plate 70 without having to flow a heat exchange medium through the length of the plate 7 . This avoids excessive cooling of the heat exchange medium over too long flow distances.

[Brief explanation of the drawing]

The drawings show a plurality of embodiments of the heat exchange plate according to the present invention, and FIG. 1 is a partially cutaway perspective view of a collecting conduit as a closed hollow body with only one side open. , FIG. 2 is a sectional view showing the end of a heat exchange plate with a collecting conduit mounted thereon, and FIG. 3 shows a heat exchange plate with an obliquely cut end region and a collecting pipe mounted on the slope. FIG. 4 is a sectional view of the end of a heat exchanger plate with a stepped end region and a collecting conduit mounted on the step. DESCRIPTION OF SYMBOLS 1... Collection conduit, 2... Wall opening, 3.4... Protrusion part, 5.6.72... Range, 7... Heat exchange plate, 71.75... Closing wall, 73...Free end, 74
...Diagonal cut surface, 76... Web Fig. 3 1 - Collection pipe 2 - Wall opening a - Container replacement door 1 - Closing wall Fig. 4 72 - Range 76 - Wear procedure Written amendment (method) September 11, 1986

Claims (1)

[Scope of Claims] 1. A plate-shaped heat exchanger, comprising continuous upper and lower closing walls, and a vertically long web integrally connected to the walls between the two closing walls. A collection conduit is arranged in the free end region of the heat exchanger having a plurality of separately formed flow channels for the heat transfer medium and forming a cross channel, the collection In those types in which the individual flow channels are connected to the conduits and the collective channels are closed tightly to the outside and have integrated inlet and outlet conduits for the heat transfer medium, the collective The conduit (1) is formed as an elongated hollow body and rests on the closing wall (71) of the heat exchanger plate (7) in the corresponding end region, and the hollow of the collecting conduit (1) The closing wall region (72) located below the chamber (2) is completely or partially removed, leaving the web (76), so that the hollow chamber (2) is also removed in this region.
) is connected to a flow channel. 2. The vertically elongated hollow body of the collecting pipe (1) is a tubular member, and this member has an opening on one side extending in the axial direction, and a continuous flange-like protrusion (3 ,
2. Plate-shaped heat exchanger according to claim 1, characterized in that the tubular elements (4) are integrally formed and the tubular elements are tightly closed at their end faces (5, 6). 3. Plate-shaped heat exchanger according to claim 1, in which the collecting pipes (1) are mounted tightly in a planar manner on the associated closing wall (71). 4. Plate-shaped heat exchanger according to claim 1, in which the collecting conduits (1) are mounted in steps on the associated closing wall (71). 5. The collecting pipes installed in tiers are connected to the heat exchange plate (7
5. Plate-shaped heat exchanger according to claim 4, which is designed as a closure for tight closure of the free end of a plate. 6. The inflow and outflow conduits for the heat transfer medium are closely connected in the collecting conduit (1) axially or radially with respect to the direction of the flow path. The plate-shaped heat exchanger according to any one of items 5 to 5. 7. The collecting conduit (1) is connected to the closing wall (71) with arbitrary distribution.
) The plate-shaped heat exchanger according to claim 3, which is mounted on the plate-shaped heat exchanger according to claim 3.