DE102016011254A1 - Bypass blocking device for heat exchangers - Google Patents

Abstract

The invention relates to a bypass blocking device for a heat transfer core (110) comprising at least one flat tube stack (160) constructed in the stacking direction (170), in which a first fluid flowing in the flat tubes (140) communicates with the flat tubes ( 140) flowing around the second fluid in heat exchange, which has a sheath (270) extending at least at one of the open transverse sides (230, 240) of the heat transfer core (110) in the stacking direction (170) from the bottom (260) to the top (250 ) of the heat transfer core (110) and at least partially extends along a longitudinal direction (150) of the heat transfer core (110). Has the sheath (270) transversely at least two in the stacking direction (170) extending contact areas (350) of the sheath (270) on the heat exchanger core (110) and at least one of the transverse side (230, 240) of the heat exchanger core (110) spaced and between two Arranged contact areas (350) (340), so a flowing between the housing (100) and the heat transfer core (110) bypassing flow of the second fluid can be significantly reduced or even completely prevented.

Description

The invention relates to a bypass blocking device for a heat transfer core, a heat transfer core or a heat exchanger with such a bypass blocking device.

From the US 2015/0260466 A1 a heat transfer core is known, which is composed of two flat tube stacks, which in turn consist of several stacked in the stacking direction flat tubes. In this case, comb-like partitions are used in the flat tube stack transverse side, the tines are connected to each other via a web, the tines are inserted into the formed between the flat tubes fluid channels. Due to such comb-like partitions, the fluid passages formed between the flat tubes are subdivided so that in the case of an at least partially cross-flow arrangement of the first fluid flowing in the flat tubes to the second fluid flowing around the flat tubes, the second fluid flows meandering through the heat transfer core. Now, if such a heat transfer core used in a housing, so may be formed due to the tolerances between the heat transfer core and the housing between the same gaps in which the second fluid forms a bypass current that passes the housing on the heat transfer core. Such a design of a bypass current is also promoted in that due to the partitions, the second fluid is at least partially discharged from the heat transfer core. Thus, the second fluid flowing out of the heat exchanger core must undergo a deflection in the region of the transverse sides in order to pass back into the heat exchanger core so that it can flow through it again in a meandering manner. By means of such gaps between the heat transfer core and the housing, a proportion of the second fluid flow can thus be withdrawn from the heat exchange, so that this adversely affects the efficiency of the heat exchanger.

The present invention is concerned with the problem of providing for a heat transfer core or for a heat exchanger, an improved or at least one alternative embodiment, which is characterized in particular by the use of a bypass blocking device, which prevents or at least occurring between the housing and the heat transfer core bypass currents can be reduced.

In one aspect of the invention, a bypass blocking device is proposed for a heat transfer core having at least one flat tube stack constructed of stacked flat tubes in which a second fluid circulating in the flat tube streams of the first fluid is in heat exchange with the second fluid flowing around the flat tubes, the bypass blocking device a shell which extends at least at one of the open transverse sides of the heat transfer core in the stacking direction from the bottom to the top of the heat transfer core and along a longitudinal direction of the heat transfer core at least partially, the shell transverse side at least two stacking contact areas of the shell to the heat transfer core and has at least one of the transverse side of the heat transfer core spaced and arranged between two contact areas curvature.

Advantageously, any bypass flows of the second fluid between the housing and the heat exchanger core in the installation position can be prevented or at least prevented by the use of such a bypass blocking device. Advantageously, such a curvature in the jacket of the bypass blocking device directs any second fluid flow emerging from the heat exchanger core back into the heat transfer core, since the curvature is limited by two contact areas which are in contact with the heat transfer core such that a flow occurs in the contact areas of the second fluid between the shell and the heat exchanger core can be largely prevented. As a result, all the second fluid entering the bulge is forcibly returned to the heat transfer core or a static state without flow occurs. Thus, however, a bypass flow of the second fluid between the heat transfer core and the housing can be reduced or prevented at least in such a region of a curvature arranged between two contact regions.

In this case, the direction of stacking of the heat exchanger is understood to mean the direction in which the flat tubes are stacked with their flat, broad sides within the respective flat tube stack. The longitudinal direction of the heat exchanger is to be understood as the direction in which the flat tubes or the heat exchanger extend from the inlet region of the first fluid to the outlet region of the first fluid. The term transverse direction is to be understood as meaning that direction which is perpendicular to the longitudinal direction and perpendicular to the stacking direction and accordingly represents in another definition the direction in which the flat tube stacks follow in the case of a plurality of flat tube stacks or in the case of only one flat tube stack the width of the flat tubes extends.

Under the wide, flat side of the flat tubes are the sides of the flat tubes to understand that in the longitudinal direction of the flat tubes and in Transverse direction of the flat tubes extend. As a short side of the flat tubes, the side is understood to extend in the longitudinal direction and in the stacking direction. The two front sides of the flat tubes are arranged in the region in which the first fluid flows into or flows out of the flat tube.

The open transverse sides of the heat exchanger core are to be understood as the sides of the heat exchanger core which extend in the stacking direction and in the longitudinal direction. They are therefore referred to as open, as are the openings for the entry or exit of the second fluid in the second fluid channels or from the second fluid channels, which are formed between the flat tubes on these pages. In this case, the heat transfer core has at least two open transverse sides and consequently, depending on the perspective, a left open transverse side and a right open transverse side or a first open transverse side and second open transverse side. These open transverse sides are hereinafter referred to as short sides. If the term is used on the transverse side, then this term is based on the fact that the respective component is arranged on one of the transverse sides.

Furthermore, the underside and the top of the flat tube stack are to be understood as meaning the sides of the flat tube stack which extend in the transverse direction and the longitudinal direction of the heat exchanger core, so that these sides are formed essentially by the broad, flat sides of the flat tube ends in the flat tube stack. It is unimportant for the present invention, which of the two above-described sides of the heat transfer core is referred to as the bottom or top, so that the terms can be used or changed as desired.

The front side of the heat exchanger core is understood to mean the remaining sides, in the area of which essentially the inlet or outlet of the first fluid is located in the flat tubes.

It is understood by flat tubes tubes whose width is greater than their height, in particular, the width is less than the length formed. If such flat tubes are stacked on one another with their flat, broad sides, the longitudinal direction of the individual flat tubes being aligned parallel to one another, a flat tube stack is understood to mean a stack of flat tubes of this type. In this case, the heat transfer core can only have such a flat tube stack or more of the same.

As the first fluid flowing in the flat tubes, an exhaust-containing fluid can be used, such as charge air with an exhaust gas component or exhaust gas with other admixed fluids.

As the second fluid may be used water or a hydrous mixture comprising, for example, antifreeze, glycol or other coolant additives.

The term sheathing is to be understood as a sheathing formed at least in sections in the circumferential direction for the heat transfer core, which extends at least on one of the open transverse sides from the lower side to the upper side of the heat transfer core. Consequently, the sheathing can be formed on one side transversely and, for example, be positioned or fixed on the heat exchanger core by means of a band or webs formed around the heat exchanger core and formed on the sheathing. However, it is also conceivable that the casing extends at least in sections in the longitudinal direction, stacking direction and / or transverse direction over further sides of the heat exchanger core.

Contact areas of the jacket on the heat exchanger core are areas of the jacket which come into contact with the heat exchanger core in such a way that a flow of the second fluid between the jacket and the heat exchanger core is largely suppressed. In this case, the contact region of the casing can at least partially be in direct contact with the heat transfer core or with other components of the heat transfer core such as a comb-like partition.

The term buckling means a recess formed on the casing between two contact regions, which forms a cavity between the casing and the heat exchanger core, so that the second fluid can flow through this cavity or the curvature.

Furthermore, the heat transfer core may have at least one comb-like partition whose tines are connected to one another via a web, the tines being arranged between at least some flat tubes.

Advantageously, the second fluid channels formed between the flat tubes can be subdivided by such a comb-like partition wall or its prongs in such a way that the second fluid flowing into these second fluid channels is forced to meander through the heat exchanger core. Accordingly, the second fluid flows at least in sections in the cross flow to the first fluid and in the region of the curvature in countercurrent or direct current to the first fluid. In the region of the curvature, a deflection of the second fluid is achieved, which emerges from the heat transfer core and at least partially and through the curvature back into the heat transfer core is returned. Through such a flow guidance of the second fluid, bypass flows of the second fluid flow can be at least reduced or completely prevented.

Here, a comb-like partition wall is understood to mean a web on which tines are formed perpendicular to the web, which can be introduced into the fluid channels formed between the flat tubes, so that the second fluid passages are subdivided at least in the area of the tines. In this case, such a comb-like partition may be formed of a similar or the same material as the material of the tubes, for example made of steel, stainless steel, aluminum or the like and be integrally connected to the heat transfer core. But it is also conceivable that the comb-like partition wall is formed as part of the sheath of the material of the sheath.

The term tines is understood to mean elongated structures projecting perpendicularly to the web. If such structures are formed directly opposite one another on the web, they belong to the same prong and are accordingly referred to as a prong.

Furthermore, the partition may be arranged at least transversely in a contact region of the casing on the heat exchanger.

Advantageously, thereby, the sheath in operative connection with the partitions support the meandering flow of the second fluid through the heat transfer core such that any bypass flows of the second fluid between the housing and the heat transfer core can be further reduced. Since the partition wall is arranged at least transversely in a contact region of the casing on the heat exchanger, the first fluid is introduced in a targeted manner in the region of the curvature by the partition wall. Thus, the second fluid can not flow into other areas. Due to the curvature, the second fluid is then returned to the heat transfer core and guided deeper into the heat transfer core by the subsequent partition wall. As a result, an undesirable outflow of the second fluid into another area is largely prevented. Consequently, in the interaction of the contact regions with the partitions, an almost complete deflection of the second fluid flow emerging from the heat transfer core in the region of the curvature can be achieved back into the heat transfer core. Thus, the meandering course of the second fluid flow is promoted by the curvature and / or the partitions such that any bypass streams of the second fluid can be advantageously prevented or at least reduced.

Furthermore, at least one comb-like partition wall can have an arrangement of the web on the first transverse side of the heat exchanger core.

Advantageously, at least on the first transverse side, a web of the heat transfer core can be arranged, wherein the web can, for example, in cooperation with a contact region of the jacket advantageously lead to a reduction of bypass currents of the second fluid between the heat transfer core and the housing.

Furthermore, additionally or alternatively, at least one comb-like partition wall can have an arrangement of the web on the second transverse side of the heat exchanger core.

Advantageously, therefore, on the second transverse side of the heat exchanger core, such a web, for example, in cooperation with a contact region of the jacket contribute to a reduction of bypass currents of the second fluid between the heat exchanger core and the housing.

Furthermore, a comb-like partition wall can have an arrangement of the web between two flat tube stacks of the heat exchanger core.

Advantageously, therefore, the web between two flat tube stacks can also be used advantageously by construction of a partition wall between the two flat tube stacks that the second fluid flow meanders also in terms of the respective second flat tube stack meandering the heat transfer core, as between the two flat tube stacks between the flat tubes and the flat tube stacks arranged fluid channel can be divided.

Furthermore, at least in sections, the prongs of at least one comb-like dividing wall can have an orientation perpendicular to the longitudinal direction of the heat exchanger core.

Advantageously, by such a vertical alignment of the tines each similar or equal channels are formed, so that the second fluid flow undisturbed meandering can flow through the heat transfer core.

Furthermore, at least in some sections, the prongs of at least one comb-like partition wall can have an oblique orientation to the longitudinal direction in the direction of the longitudinal direction.

Advantageously, by such an oblique orientation of the teeth of the meandering second fluid flow having a greater proportion of the flow in the longitudinal direction, wherein between two prongs each a nozzle-like constriction is formed, so that a stronger turbulence of the second fluid flow and associated greater turbulence in the second fluid flow can occur ,

Furthermore, at least in sections, the prongs of at least one comb-like dividing wall may have an oblique orientation to the longitudinal direction opposite to the longitudinal direction.

Advantageously, a stronger turbulence of the meandering second fluid flow and associated greater turbulence in the second fluid flow can also be formed in this case by the oblique arrangement of the tines.

Furthermore, at least one partition can have a material connection to the heat exchanger core.

Advantageously, by a cohesive design of the partition with the heat transfer core of the heat transfer core can be formed with stabilizing partitions, so that in the region of the partition walls, a dense and stable connection of the partition with the heat transfer core can be formed. On the other hand can advantageously be achieved due to the cohesive formation of the tines with the heat transfer core immovable positioning of the partitions in the heat transfer core, which can only be destroyed by an extremely high force. In addition, such with the heat transfer core cohesively connected partitions can increase the stability of the heat transfer core advantageous.

Furthermore, at least one partition may have a cohesive design with the jacket.

Advantageously, in this case, regardless of the heat transfer core and depending on the needs of each application additional or alternative partitions are formed in the heat transfer core, so that can be flexibly responded to the needs of the application by means of the sheath.

But it is also conceivable that both materially connected to the heat transfer core, as well as cohesively connected to the shroud partitions are used, so that at least a part of the partitions are accordingly tightly and firmly connected to the heat transfer core, while cohesively connected to the shroud partitions flexible in response can be used in addition to the particular application to achieve the respective desired flow behavior of the second fluid in the heat transfer core.

Furthermore, at least one tine of the comb-like partitions can extend in the transverse direction over 20% to 90% of the extent of the heat exchanger in the transverse direction in the region of the at least one tine.

Advantageously, can be achieved by such an extension of the tine in the transverse direction of the heat exchanger, the correspondingly desired meandering flow behavior of the second fluid stream in the heat transfer core.

It is also conceivable that at least one tine of the comb-like partition in the transverse direction over 30% to 90%, for example over 50% to 90%, in particular over 60% to 90%, and possibly over 60% to 80% of the extent of Heat exchanger extends in the transverse direction in the region of at least one tine.

Furthermore, the contact region of the sheath can be designed to be complementary to the heat transfer core in the contact region.

Advantageously, due to the complementary design, a high sealing capability of the contact region with regard to the second fluid flow can be achieved, so that bypass flows between the contact region and the heat transfer core can be largely prevented or at least reduced.

Here, a complementary embodiment is understood to mean that the surface of the casing facing the heat exchanger core essentially follows the contour of the heat exchanger core in the contact region. Accordingly, if a partition wall is used in the contact area on the heat transfer core, then the contact area with respect to its surface facing the heat transfer core essentially also follows the partition arranged in this area and consequently either the tine of the partition or the web of the partition.

Furthermore, the contact region may extend in the stacking direction from the underside to the top side of the heat exchanger core.

This can advantageously be ensured from the bottom to the top of the heat exchanger core, that the contact area in the region of its arrangement, the shell and the heat transfer core to each other so sealing off forms that transverse bypass currents on the heat transfer core can be largely prevented or at least reduced.

Furthermore, the sheath can have at least two components selected from the following group: a right sheath half, a left sheath half, a left sheath side, a right sheath side, a sheath underside, a sheath top side, a sheath shell, which has the form-fitting connection means selected from the following Group: a locking connection, a Verclipsverbindung are interconnected.

If, for example, the jacket consists of a right jacket half and a left jacket half, the two jacket halves can be fixed to one another via the connecting device to the heat transfer core, with the left jacket half and the right jacket half extending transversely at least from the bottom to the top of the heat exchanger core. But it is also conceivable that the shell halves are formed such that they have at the bottom and / or top of the heat transfer core an extent to at least the middle of the heat exchanger core, so that the right shell half together with the left shell half the heat transfer core at least in sections in the longitudinal direction and completely encompassed in the circumferential direction.

But it is also conceivable that the sheath is formed in four parts, so that a left shell side, a right shell side, a sheath underside, a shell top are connected via a plurality of connecting elements having connecting device, so that these four-part sheath at least partially in the longitudinal direction of the heat transfer core and in Completely encompasses the circumferential direction.

But it is also conceivable that a jacket shell is present, which comprises at least three sides of the heat exchanger core and in which either a left shell side, a right shell side, a shell underside or a shell top is connected via a connecting device with the shell shell, so that such a two-part Sheath the heat transfer core at least partially completely in the longitudinal direction and in the circumferential direction includes.

As a connection device, a latching connection or a clip connection can be used, wherein at least one latching lug is provided in a latching connection, which can engage in a recess of the complementary element of the connection device, so that the parts of the casing can be fixed to one another and fixed on the heat transfer core by means of the positive connection device ,

In a clip connection, a connecting element may be provided, which can be locked by an at least partially comprehensive clip within the clip, so that fixed in this case, the components of the shell to each other and therefore the shell can be positioned on the heat exchanger core.

Furthermore, the jacket on the first transverse side in the inlet region of the second fluid in the heat transfer core can have a recess extending at least from the underside to the top side.

Advantageously, by means of such a recess, the second fluid can be introduced in cross flow to the first fluid in the heat transfer core.

Here, the inlet region is understood to be the region in which the second fluid enters the heat exchanger core, the inlet region extending in the circumferential direction around the heat exchanger core. Consequently, the inlet area along the circumferential direction also extends to areas of the heat exchanger core, in which no recess is arranged. The term circumferential direction is understood to mean the direction that follows when one follows the circumference of the heat exchanger with the longitudinal axis as the axis of rotation or center.

Furthermore, the casing may have a curvature on the second transverse side in the inlet region of the second fluid.

Advantageously, the fluid flowing in the inlet region, which flows essentially in crossflow to the first fluid and consequently will flow out of the heat exchanger core on the second transverse side, can be returned through the bulge into the heat exchanger core, so that a possible bypass flow of the second fluid flow between the housing and the heat exchanger core can be largely prevented.

Furthermore, the jacket in the inlet region of the second fluid at the top and / or at the bottom can have an upstand extending in the stacking direction to the housing of the heat transfer core and extending transversely over the heat transfer core and extending in the longitudinal direction at least over the region of the recess.

Advantageously, by such a Aufkantung entering the inlet region in the heat exchanger core fluid flow, at least partially along the top and bottom of the heat transfer core along, are returned to the heat transfer core, as such a curb, which is disposed substantially between the top and the bottom of the heat exchanger core and the housing, prevent further flow of this part of the second fluid stream. As a result, this part of the second fluid stream is returned to the heat exchanger core, so that a bypass flow of the second fluid stream can be further reduced.

If the heat transfer core is constructed from two flat tube stacks, then it is expedient for the upstand to be arranged in the region of the gap between the two flat tube stacks, so that the part of the second fluid flow which flows on the top or bottom side of the heat transfer core intersects the gap between the two flat tube stacks can be routed back into the heat transfer core.

In this case, the upstand may be formed running obliquely to the stacking direction, in particular in the direction of the part of the second fluid stream flowing onto the upstand.

Advantageously, owing to this oblique design, the part of the second fluid stream which flows on the underside and top side of the heat exchanger core can be returned to the heat transfer core in a flow-favored manner.

In this case, an edge which is formed on the upper or lower side of the sheath and which extends in the direction of the housing is understood to mean an edge.

It is conceivable that the sheath is formed in the region of the top or bottom and in the region of the upstand from the top or bottom of the heat transfer core, so that even in a heat exchanger, consisting of only one flat tube stack, the part of the second fluid stream, the flows at the top and bottom in the inlet region, can be routed back into the heat transfer core and the example formed on the transverse side curvature.

Furthermore, the sheath can have at least one stiffening element, in particular a stiffening rib or a stiffening web, at least in the contact region.

Advantageously, due to these stiffening elements, the curvatures can be stiffened with respect to one another or the contact area can be reinforced in terms of stability, so that the sheathing can be made structurally more stable overall.

Here, a stiffening element is understood to mean a rib or web which can extend from the one arch to the subsequent arch in the area of the contact area, the area in which the stiffening elements are arranged having a greater extent in the longitudinal direction, as the contact area itself.

Furthermore, the sheath on the upper side and / or the underside may have at least one transverse rib extending at least partially over the heat exchanger core in the transverse direction.

Advantageously can be reduced or prevented by such transverse ribs on the underside or the top of the shell occurring in the region of the top and bottom bypass flows. For this purpose, the transverse ribs may be formed such that they lie substantially relatively close to the housing wall, so that they act as a flow obstacle against such a bypass current, whereby the bypass current in the region of the underside and the top of the heat exchanger core or the casing at least reduced, if not prevented.

Here, a transverse rib is understood as meaning an elongate accumulation of material whose length extends at least partially in the transverse direction of the heat exchanger core. In this case, it is understood, in a partial manner, that either the transverse rib extends at least in sections in the transverse direction or that the transverse rib is arranged at least at an angle of less than 45 ° to the transverse direction.

Furthermore, at least two transverse ribs on the left side and on the right side can be arranged offset from one another and connected to one another via an at least partially longitudinally extending web.

Advantageously, by means of such a through connection of two transverse ribs by means of a web on the underside or top side over the entire transverse direction a bypass blockage are constructed, so that the two offset transverse ribs build in connection with the web in the transverse direction over the entire extent of the heat transfer core a seal against the housing wall can.

Here, a web extending proportionately in the longitudinal direction is understood as meaning a web which extends at least in sections in the longitudinal direction or a web which is arranged at an angle of less than 45 ° to the longitudinal direction.

In a further aspect of the invention, a heat transfer core is proposed with a bypass blocking device as described above.

In this case, the advantages described above with regard to a bypass blocking can be achieved.

Furthermore, the heat transfer core may have a tube plate in which the flat tubes are inserted terminally and which is equipped at least with an inlet for the second fluid.

Advantageously, such a design of the tube bottom of the heat transfer core can also be supplied via the tube bottom with second fluid, so that at least one connection, namely that of the inlet of the second fluid, can be saved on the housing side.

It is understood by a tube plate a flange plate, or a plate with passages, wherein the flat tubes are inserted terminally in the passages. Furthermore, the tubesheet may still have fastening elements or be welded to other components.

Furthermore, the inlet for the second fluid can be arranged in the region of the recess of the casing.

Advantageously, the second fluid can thus be introduced via the tube bottom or via the inlet formed in the tube bottom in cross flow to the first fluid flow into the heat exchanger core via the recess, without the need for additional fluid channels.

In a further aspect of the invention, a heat exchanger with a heat transfer core as described above or with a bypass blocking device as described above is proposed.

Furthermore, at least one curvature of the casing can be in contact with a housing of the heat exchanger in which the heat exchanger core is arranged and through which the second fluid flows.

Advantageously, by such a contacting formation of the curvature or the bulges with the housing, any bypass current between the heat transfer core and the housing or in the gaps between the heat transfer core and the housing can be prevented, that the sheath the gaps between the heat transfer core and on the one hand fills the housing and that on the other hand, due to the curvatures, a deflection of the emerging from the heat exchanger core second fluid flows back into the heat exchanger core occurs. As a result, by means of a contacting formation of the bulges on the housing, a bypass flow of the second fluid flow can be further reduced.

In this case, the heat exchanger can have an obliquely, irregularly or conically extending housing.

Advantageously, even with such irregularly constructed housings, a heat transfer core can nevertheless be used, which is standardized and has a regular design. Any larger or smaller or different gaps between the heat exchanger core and the housing can be advantageously intercepted by a jacket adapted to the respective application and accordingly the bypass currents are reduced in a desired manner based on the respective application.

It show, each schematically:

1 a housing for a heat transfer core,

2 an associated heat transfer core with a jacket bypass bypass device,

3 the heat transfer core in a 180 ° rotated supervision,

4 an enlarged section of the heat exchanger core in the region of the casing,

5 an enlarged section of the heat transfer core in the inlet region of the second fluid,

6 a longitudinal section through the heat transfer core in installation position with the housing,

7 a cross section through the heat transfer core in the contact region of the jacket to the heat transfer core.

In a housing 100 , as in 1 shown, can be a heat transfer core 110 for example according to 2 be used. In this case, the housing forms 100 together with the heat transfer core 110 the heat exchanger 120 out.

The heat transfer core 110 can, as in 2 shown a bypass lock device 130 have, by means of the bypass currents, extending between the housing 100 and the Heat transfer core 110 can be trained, prevented or at least reduced.

The heat transfer core 110 is made of several flat tubes 140 constructed of a first fluid, not shown in the longitudinal direction 150 flow through the heat transfer core. Several flat tubes 140 are in the heat transfer core to at least one flat tube stack 160 stacked in the present case, the heat transfer core 110 from two flat tube stacks 160 is constructed. Here are within a flat tube stack 160 the flat tubes 140 along a stacking direction 170 Stacked arranged and the flat tube stack 160 along a transverse direction 180 of the heat transfer core 110 , Between the flat tubes 140 become second fluid channels 190 formed so that by means of the second fluid channels 190 the flat tubes 140 from that in the second fluid channels 190 flowing second fluid to flow around. The first fluid flows through the inside of the flat tubes 140 arranged first fluid channels 200 essentially through the interior of the flat tubes 140 be formed.

The heat transfer core 110 can with a tubesheet 210 be equipped, the unillustrated passages, in which the flat tubes 140 be used. For example, by soldering or welding the tube sheet 210 with the flat tubes 140 be connected cohesively. Furthermore, the tubesheet 210 still fasteners 220 have, by means of which the tube sheet 210 or the heat transfer core 110 with the housing 100 can be connected. Such fasteners 220 may be formed as holes as illustrated or in another embodiment as bolts.

The heat transfer core 110 has a first transverse side 230 on and a second transverse side 240 , where the first transverse side 230 and the second transverse side 240 are open with respect to the second fluid or the second fluid stream, so that the second fluid on the first transverse side 230 or over the second transverse side 240 in the heat transfer core 110 enter or from the heat transfer core 110 can escape. The transverse sides 240 . 250 extend in the longitudinal direction 150 and in the stacking direction 170 , Furthermore, the heat transfer core 110 another top 250 and a bottom 260 on. The top 250 or the bottom 260 are interchangeable with their name and extend longitudinally 150 and in the transverse direction 180 ,

The bypass lock device 130 according to 2 a two-part sheath 270 on, with the sheath 270 from a first shell half 280 and a second jacket half 290 is constructed. It is also conceivable that the sheath 270 only a first shell side, not shown, which is transverse to the underside 260 to the top 250 of the heat transfer core extends.

The two shell halves 280 . 290 can via a connecting device 300 be connected to each other. In this case, the connecting device 300 as Verrastverbindung, as in the 2 to 5 represented, be formed.

The first shell half 280 can in an inlet area 310 of the second fluid in the heat transfer core 110 a recess 320 arranged transversely, allowing the second fluid to cross flow to the first fluid in the heat transfer core 110 can flow in. In this inlet area 310 can the raw soil 220 at least one inlet 330 for the second fluid in the heat transfer core 110 exhibit.

As in 3 shown in the inlet area 310 the second jacket half 290 a vault 340 by means of which that from the heat transfer core 110 outflowing second fluid diverted and into the heat transfer core 110 can be returned.

As in the 2 . 3 . 4 . 5 shown on the shell halves 280 . 290 transverse contact areas 350 be formed, which is close to the heat transfer core 110 are positioned adjacent. Such contact areas 350 can use stiffening elements 360 in the form of stiffening ribs or stiffening webs, so that the shell halves 280 . 290 can be interpreted constructively stable overall.

Between the contact areas 360 are the vaults 340 arranged.

By the combination of vaults 340 and contact areas 350 and possibly by additional support by comb-like partitions 370 , such as in 7 can be achieved, that the second fluid flow 378 , like in the 4 shown meandering the heat transfer core 110 flows through.

So in the inlet area 310 , as in 5 shown, the incoming second fluid almost completely in the heat transfer core 110 is initiated, can on the second shell half 290 an upstand 380 be formed, extending to the housing 100 extends. Preferably, the upstand is 380 in the area of the gap 390 between two flat tube stacks 160 arranged so that due to the flow obstacle through the upstand 380 the second fluid, which is at the bottom 250 or at the top 250 between the heat transfer core 110 and the housing 100 flows into the heat transfer core 110 can be initiated.

In addition, on the sheathing 270 transverse ribs on the upper side or underside 400 be formed, with respect to the first shell half 280 and the second jacket half 290 offset from each other can be arranged, but by a longitudinally extending portion 410 can be connected to each other.

As in 6 can be shown by such transverse ribs 400 a bypass current on the bottom 260 or on the top 250 of the heat transfer core 110 prevented or at least reduced because the transverse ribs 400 may be formed such that they on the inner wall of the housing 100 issue.

Is also, as in the 6 shown the case 100 formed irregular or tapered, so may despite irregularity of the housing 100 a regular or a rectangular constructed heat transfer core 110 be used and the different sized gaps 415 between the heat transfer core 110 and the housing 100 by means of differently long trained transverse ribs 400 be balanced, so that despite the conical shape of the housing 100 and the regular or rectangular course of the heat transfer core 110 by means of the transverse ribs 400 a bypass current between the housing 100 and the heat transfer core 110 can be prevented or reduced.

In the 7 is a cross section through the heat transfer core 110 in a contact area 350 shown. Is in such a contact area 350 a comb-like partition 370 arranged, which are the second fluid channels 190 longitudinal 150 divided, so by means of such partitions 370 the meandering course of the second fluid stream 378 be further supported because of the dividing walls 370 the second fluid stream 378 again and again from the heat transfer core 110 is discharged. In this case, the contact area 350 so complementary to the heat transfer core 110 be formed that the contact area 350 close to the flat tubes 140 of the heat transfer core 110 is present and possibly also close to the partitions 370 ,

The comb-like partition 370 can from a jetty 420 be constructed of several prongs 430 which is between the flat tubes 140 are arranged. It can be a tine 430 only on one side of the bridge 420 be formed or on both sides of the bridge 420 protrude, as in 7 shown. In this case, the tine extends 430 with several flat tube stacks 160 over several flat tube stacks 160 ,

It is also conceivable that the tines 430 in the case of a transverse arrangement, not shown, of the web 420 only to one side in the flat tube stack 160 extend into it so that the bridge on a transverse side 240 . 250 is arranged. In this case, the contact area 350 also complementary to the jetty 420 the comb-like partition 370 be educated.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• US 2015/0260466 A1 [0002]

Claims (21)

Bypass blocking device for at least one of in the stacking direction ( 170 ) stacked flat tubes ( 140 ) constructed flat tube stack ( 160 ) heat transfer core ( 110 ), in which one in the flat tubes ( 140 ) flowing first fluid with the flat tubes ( 140 ) is in heat exchange around flowing second fluid, which is a sheath ( 270 ), which at least at one of the open transverse sides ( 230 . 240 ) of the heat transfer core ( 110 ) in the stacking direction ( 170 ) from the bottom ( 260 ) to the top ( 250 ) of the heat transfer core ( 110 ) and along a longitudinal direction ( 150 ) of the heat transfer core ( 110 ) extends at least partially, wherein the sheath ( 270 ) transversely at least two in the stacking direction ( 170 ) extending contact areas ( 350 ) of the sheath ( 270 ) to the heat transfer core ( 110 ) and at least one of the transverse side ( 230 . 240 ) of the heat transfer core ( 110 ) spaced and between two contact areas ( 350 ) vaulting ( 340 ) having. Bypass blocking device according to claim 1, wherein the heat transfer core ( 110 ) at least one comb-like partition wall ( 370 ) whose tines ( 430 ) over a bridge ( 420 ) and the tines ( 430 ) between at least some flat tubes ( 140 ) are arranged. Bypass blocking device according to claim 2, wherein the comb-like partition ( 370 ) at least transversely in a contact area ( 350 ) of the sheath ( 270 ) at the heat exchanger ( 110 ) is arranged. Bypass blocking device according to one or more of the preceding claims 2 to 3, wherein the at least one comb-like partition wall ( 370 ) an arrangement of the web ( 420 ) selected from the following group: An arrangement of the web ( 420 ) on the first transverse side ( 230 ) of the heat transfer core ( 110 ), an arrangement of the bridge ( 420 ) on the second transverse side ( 240 ) of the heat transfer core ( 110 ), an arrangement of the bridge ( 420 ) between two flat tube stacks ( 160 ) of the heat transfer core ( 110 ). Bypass blocking device according to one or more of the preceding claims 2 to 4, wherein at least in sections the tines ( 430 ) at least one comb-like partition wall ( 370 ) an orientation relative to the longitudinal direction ( 150 ) of the heat transfer core ( 110 ) selected from the following group: an orientation perpendicular to the longitudinal direction ( 150 ) of the heat transfer core ( 110 ), an oblique orientation to the longitudinal direction ( 150 ) in the direction of the longitudinal direction ( 150 ), an oblique orientation to the longitudinal direction ( 150 ) against the longitudinal direction ( 150 ). Bypass blocking device according to one or more of the preceding claims 2 to 5, wherein at least one comb-like partition ( 370 ) has a cohesive connection with at least one component selected from the following group: with the heat transfer core ( 110 ), with the sheath ( 270 ). Bypass blocking device according to one or more of the preceding claims 2 to 6, wherein at least one tine ( 430 ) of the comb-like partition ( 370 ) in the transverse direction ( 180 ) over 20-90% of the extension of the heat transfer core ( 110 ) in the transverse direction ( 180 ) in the region of the at least one tine ( 430 ). Bypass blocking device according to one or more of the preceding claims, wherein the contact region ( 350 ) of the sheath ( 270 ) complementary to the heat transfer core ( 110 ) in the contact area ( 350 ) is trained. Bypass blocking device according to one or more of the preceding claims, wherein the contact region ( 350 ) in the stacking direction ( 170 ) from the bottom ( 260 ) to the top ( 250 ) of the heat transfer core ( 110 ). Bypass blocking device according to one or more of the preceding claims, wherein the sheath ( 270 ) comprises at least two components selected from the following group: a first shell half ( 280 ), a second jacket half ( 290 ), a first shell side, a second shell side, a shell underside, a shell top side, a shell shell, which is positively connected by means of a connecting device ( 300 ) selected from the following group: a latch connection, a clip connection are connected together. Bypass blocking device according to one or more of the preceding claims, wherein the sheath ( 270 ) on the first transverse side ( 230 ) in the inlet area ( 310 ) of the second fluid in the heat transfer core ( 110 ) one at least from the bottom ( 260 ) to the top ( 250 ) of the heat transfer core ( 110 ) extending recess ( 320 ) having. Bypass blocking device according to one or more of the preceding claims, wherein the sheath ( 270 ) on the second transverse side ( 240 ) in the inlet area ( 310 ) of the second fluid a curvature ( 340 ) having. Bypass blocking device according to one or more of the preceding claims, wherein the sheath ( 270 ) in the inlet area ( 310 ) of the second fluid at a position selected from the following group: at the top ( 250 ), on the bottom ( 260 ) in the stacking direction ( 170 ) to the housing ( 100 ) of the heat transfer core ( 110 ) extending, in the transverse direction ( 180 ) over the heat transfer core ( 110 ) extending and longitudinally ( 150 ) at least over the area of the recess ( 320 ) extending upstand ( 380 ), wherein the upstand ( 380 ) obliquely to the stacking direction ( 170 ) may be formed running. Bypass blocking device according to one or more of the preceding claims, wherein the sheath ( 270 ) is at least partially formed of plastic. Bypass blocking device according to one or more of the preceding claims, wherein the sheath ( 270 ) at least in the contact area ( 350 ) at least one stiffening element ( 360 ), in particular a stiffening rib or a stiffening web. Bypass blocking device according to one or more of the preceding claims, wherein the sheath ( 270 ) on at least one side selected from the following group: the top side ( 250 ), the underside ( 260 ), at least one in the transverse direction ( 180 ) at least partially over the heat transfer core ( 110 ) extending transverse rib ( 400 ) having. Bypass blocking device according to one or more of the preceding claims, wherein at least two transverse ribs ( 400 ) are arranged on the left side and the right side offset from each other and at least partially in the longitudinal direction ( 150 ) extending section ( 410 ) are interconnected. Heat exchanger core with a bypass blocking device ( 130 ) according to one or more of the preceding claims, wherein the heat transfer core ( 110 ) a tube sheet ( 210 ), in which the flat tubes ( 140 ) are inserted terminally and with at least one inlet ( 330 ) is equipped for the second fluid. Heat exchanger core according to claim 18, wherein the inlet ( 330 ) for the second fluid in the region of the recess ( 320 ) of the sheath ( 270 ) is arranged. Heat exchanger with a heat transfer core ( 110 ) according to one or more of the preceding claims 18 to 19 or with a bypass blocking device ( 130 ) according to one or more of the preceding claims 1 to 17, wherein at least one curvature ( 340 ) of the sheath ( 270 ) with a housing ( 100 ) of the heat exchanger ( 120 ), in which the heat transfer core ( 110 ) is arranged and flows through the second fluid is in contact. Heat exchanger according to claim 20, wherein the heat exchanger ( 120 ) an oblique, irregular or tapered housing ( 100 ) having.

Images